| 1 | /* MIPS-specific support for ELF |
| 2 | Copyright (C) 1993-2020 Free Software Foundation, Inc. |
| 3 | |
| 4 | Most of the information added by Ian Lance Taylor, Cygnus Support, |
| 5 | <ian@cygnus.com>. |
| 6 | N32/64 ABI support added by Mark Mitchell, CodeSourcery, LLC. |
| 7 | <mark@codesourcery.com> |
| 8 | Traditional MIPS targets support added by Koundinya.K, Dansk Data |
| 9 | Elektronik & Operations Research Group. <kk@ddeorg.soft.net> |
| 10 | |
| 11 | This file is part of BFD, the Binary File Descriptor library. |
| 12 | |
| 13 | This program is free software; you can redistribute it and/or modify |
| 14 | it under the terms of the GNU General Public License as published by |
| 15 | the Free Software Foundation; either version 3 of the License, or |
| 16 | (at your option) any later version. |
| 17 | |
| 18 | This program is distributed in the hope that it will be useful, |
| 19 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | GNU General Public License for more details. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License |
| 24 | along with this program; if not, write to the Free Software |
| 25 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 26 | MA 02110-1301, USA. */ |
| 27 | |
| 28 | |
| 29 | /* This file handles functionality common to the different MIPS ABI's. */ |
| 30 | |
| 31 | #include "sysdep.h" |
| 32 | #include "bfd.h" |
| 33 | #include "libbfd.h" |
| 34 | #include "libiberty.h" |
| 35 | #include "elf-bfd.h" |
| 36 | #include "ecoff-bfd.h" |
| 37 | #include "elfxx-mips.h" |
| 38 | #include "elf/mips.h" |
| 39 | #include "elf-vxworks.h" |
| 40 | #include "dwarf2.h" |
| 41 | |
| 42 | /* Get the ECOFF swapping routines. */ |
| 43 | #include "coff/sym.h" |
| 44 | #include "coff/symconst.h" |
| 45 | #include "coff/ecoff.h" |
| 46 | #include "coff/mips.h" |
| 47 | |
| 48 | #include "hashtab.h" |
| 49 | |
| 50 | /* Types of TLS GOT entry. */ |
| 51 | enum mips_got_tls_type { |
| 52 | GOT_TLS_NONE, |
| 53 | GOT_TLS_GD, |
| 54 | GOT_TLS_LDM, |
| 55 | GOT_TLS_IE |
| 56 | }; |
| 57 | |
| 58 | /* This structure is used to hold information about one GOT entry. |
| 59 | There are four types of entry: |
| 60 | |
| 61 | (1) an absolute address |
| 62 | requires: abfd == NULL |
| 63 | fields: d.address |
| 64 | |
| 65 | (2) a SYMBOL + OFFSET address, where SYMBOL is local to an input bfd |
| 66 | requires: abfd != NULL, symndx >= 0, tls_type != GOT_TLS_LDM |
| 67 | fields: abfd, symndx, d.addend, tls_type |
| 68 | |
| 69 | (3) a SYMBOL address, where SYMBOL is not local to an input bfd |
| 70 | requires: abfd != NULL, symndx == -1 |
| 71 | fields: d.h, tls_type |
| 72 | |
| 73 | (4) a TLS LDM slot |
| 74 | requires: abfd != NULL, symndx == 0, tls_type == GOT_TLS_LDM |
| 75 | fields: none; there's only one of these per GOT. */ |
| 76 | struct mips_got_entry |
| 77 | { |
| 78 | /* One input bfd that needs the GOT entry. */ |
| 79 | bfd *abfd; |
| 80 | /* The index of the symbol, as stored in the relocation r_info, if |
| 81 | we have a local symbol; -1 otherwise. */ |
| 82 | long symndx; |
| 83 | union |
| 84 | { |
| 85 | /* If abfd == NULL, an address that must be stored in the got. */ |
| 86 | bfd_vma address; |
| 87 | /* If abfd != NULL && symndx != -1, the addend of the relocation |
| 88 | that should be added to the symbol value. */ |
| 89 | bfd_vma addend; |
| 90 | /* If abfd != NULL && symndx == -1, the hash table entry |
| 91 | corresponding to a symbol in the GOT. The symbol's entry |
| 92 | is in the local area if h->global_got_area is GGA_NONE, |
| 93 | otherwise it is in the global area. */ |
| 94 | struct mips_elf_link_hash_entry *h; |
| 95 | } d; |
| 96 | |
| 97 | /* The TLS type of this GOT entry. An LDM GOT entry will be a local |
| 98 | symbol entry with r_symndx == 0. */ |
| 99 | unsigned char tls_type; |
| 100 | |
| 101 | /* True if we have filled in the GOT contents for a TLS entry, |
| 102 | and created the associated relocations. */ |
| 103 | unsigned char tls_initialized; |
| 104 | |
| 105 | /* The offset from the beginning of the .got section to the entry |
| 106 | corresponding to this symbol+addend. If it's a global symbol |
| 107 | whose offset is yet to be decided, it's going to be -1. */ |
| 108 | long gotidx; |
| 109 | }; |
| 110 | |
| 111 | /* This structure represents a GOT page reference from an input bfd. |
| 112 | Each instance represents a symbol + ADDEND, where the representation |
| 113 | of the symbol depends on whether it is local to the input bfd. |
| 114 | If it is, then SYMNDX >= 0, and the symbol has index SYMNDX in U.ABFD. |
| 115 | Otherwise, SYMNDX < 0 and U.H points to the symbol's hash table entry. |
| 116 | |
| 117 | Page references with SYMNDX >= 0 always become page references |
| 118 | in the output. Page references with SYMNDX < 0 only become page |
| 119 | references if the symbol binds locally; in other cases, the page |
| 120 | reference decays to a global GOT reference. */ |
| 121 | struct mips_got_page_ref |
| 122 | { |
| 123 | long symndx; |
| 124 | union |
| 125 | { |
| 126 | struct mips_elf_link_hash_entry *h; |
| 127 | bfd *abfd; |
| 128 | } u; |
| 129 | bfd_vma addend; |
| 130 | }; |
| 131 | |
| 132 | /* This structure describes a range of addends: [MIN_ADDEND, MAX_ADDEND]. |
| 133 | The structures form a non-overlapping list that is sorted by increasing |
| 134 | MIN_ADDEND. */ |
| 135 | struct mips_got_page_range |
| 136 | { |
| 137 | struct mips_got_page_range *next; |
| 138 | bfd_signed_vma min_addend; |
| 139 | bfd_signed_vma max_addend; |
| 140 | }; |
| 141 | |
| 142 | /* This structure describes the range of addends that are applied to page |
| 143 | relocations against a given section. */ |
| 144 | struct mips_got_page_entry |
| 145 | { |
| 146 | /* The section that these entries are based on. */ |
| 147 | asection *sec; |
| 148 | /* The ranges for this page entry. */ |
| 149 | struct mips_got_page_range *ranges; |
| 150 | /* The maximum number of page entries needed for RANGES. */ |
| 151 | bfd_vma num_pages; |
| 152 | }; |
| 153 | |
| 154 | /* This structure is used to hold .got information when linking. */ |
| 155 | |
| 156 | struct mips_got_info |
| 157 | { |
| 158 | /* The number of global .got entries. */ |
| 159 | unsigned int global_gotno; |
| 160 | /* The number of global .got entries that are in the GGA_RELOC_ONLY area. */ |
| 161 | unsigned int reloc_only_gotno; |
| 162 | /* The number of .got slots used for TLS. */ |
| 163 | unsigned int tls_gotno; |
| 164 | /* The first unused TLS .got entry. Used only during |
| 165 | mips_elf_initialize_tls_index. */ |
| 166 | unsigned int tls_assigned_gotno; |
| 167 | /* The number of local .got entries, eventually including page entries. */ |
| 168 | unsigned int local_gotno; |
| 169 | /* The maximum number of page entries needed. */ |
| 170 | unsigned int page_gotno; |
| 171 | /* The number of relocations needed for the GOT entries. */ |
| 172 | unsigned int relocs; |
| 173 | /* The first unused local .got entry. */ |
| 174 | unsigned int assigned_low_gotno; |
| 175 | /* The last unused local .got entry. */ |
| 176 | unsigned int assigned_high_gotno; |
| 177 | /* A hash table holding members of the got. */ |
| 178 | struct htab *got_entries; |
| 179 | /* A hash table holding mips_got_page_ref structures. */ |
| 180 | struct htab *got_page_refs; |
| 181 | /* A hash table of mips_got_page_entry structures. */ |
| 182 | struct htab *got_page_entries; |
| 183 | /* In multi-got links, a pointer to the next got (err, rather, most |
| 184 | of the time, it points to the previous got). */ |
| 185 | struct mips_got_info *next; |
| 186 | }; |
| 187 | |
| 188 | /* Structure passed when merging bfds' gots. */ |
| 189 | |
| 190 | struct mips_elf_got_per_bfd_arg |
| 191 | { |
| 192 | /* The output bfd. */ |
| 193 | bfd *obfd; |
| 194 | /* The link information. */ |
| 195 | struct bfd_link_info *info; |
| 196 | /* A pointer to the primary got, i.e., the one that's going to get |
| 197 | the implicit relocations from DT_MIPS_LOCAL_GOTNO and |
| 198 | DT_MIPS_GOTSYM. */ |
| 199 | struct mips_got_info *primary; |
| 200 | /* A non-primary got we're trying to merge with other input bfd's |
| 201 | gots. */ |
| 202 | struct mips_got_info *current; |
| 203 | /* The maximum number of got entries that can be addressed with a |
| 204 | 16-bit offset. */ |
| 205 | unsigned int max_count; |
| 206 | /* The maximum number of page entries needed by each got. */ |
| 207 | unsigned int max_pages; |
| 208 | /* The total number of global entries which will live in the |
| 209 | primary got and be automatically relocated. This includes |
| 210 | those not referenced by the primary GOT but included in |
| 211 | the "master" GOT. */ |
| 212 | unsigned int global_count; |
| 213 | }; |
| 214 | |
| 215 | /* A structure used to pass information to htab_traverse callbacks |
| 216 | when laying out the GOT. */ |
| 217 | |
| 218 | struct mips_elf_traverse_got_arg |
| 219 | { |
| 220 | struct bfd_link_info *info; |
| 221 | struct mips_got_info *g; |
| 222 | int value; |
| 223 | }; |
| 224 | |
| 225 | struct _mips_elf_section_data |
| 226 | { |
| 227 | struct bfd_elf_section_data elf; |
| 228 | union |
| 229 | { |
| 230 | bfd_byte *tdata; |
| 231 | } u; |
| 232 | }; |
| 233 | |
| 234 | #define mips_elf_section_data(sec) \ |
| 235 | ((struct _mips_elf_section_data *) elf_section_data (sec)) |
| 236 | |
| 237 | #define is_mips_elf(bfd) \ |
| 238 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| 239 | && elf_tdata (bfd) != NULL \ |
| 240 | && elf_object_id (bfd) == MIPS_ELF_DATA) |
| 241 | |
| 242 | /* The ABI says that every symbol used by dynamic relocations must have |
| 243 | a global GOT entry. Among other things, this provides the dynamic |
| 244 | linker with a free, directly-indexed cache. The GOT can therefore |
| 245 | contain symbols that are not referenced by GOT relocations themselves |
| 246 | (in other words, it may have symbols that are not referenced by things |
| 247 | like R_MIPS_GOT16 and R_MIPS_GOT_PAGE). |
| 248 | |
| 249 | GOT relocations are less likely to overflow if we put the associated |
| 250 | GOT entries towards the beginning. We therefore divide the global |
| 251 | GOT entries into two areas: "normal" and "reloc-only". Entries in |
| 252 | the first area can be used for both dynamic relocations and GP-relative |
| 253 | accesses, while those in the "reloc-only" area are for dynamic |
| 254 | relocations only. |
| 255 | |
| 256 | These GGA_* ("Global GOT Area") values are organised so that lower |
| 257 | values are more general than higher values. Also, non-GGA_NONE |
| 258 | values are ordered by the position of the area in the GOT. */ |
| 259 | #define GGA_NORMAL 0 |
| 260 | #define GGA_RELOC_ONLY 1 |
| 261 | #define GGA_NONE 2 |
| 262 | |
| 263 | /* Information about a non-PIC interface to a PIC function. There are |
| 264 | two ways of creating these interfaces. The first is to add: |
| 265 | |
| 266 | lui $25,%hi(func) |
| 267 | addiu $25,$25,%lo(func) |
| 268 | |
| 269 | immediately before a PIC function "func". The second is to add: |
| 270 | |
| 271 | lui $25,%hi(func) |
| 272 | j func |
| 273 | addiu $25,$25,%lo(func) |
| 274 | |
| 275 | to a separate trampoline section. |
| 276 | |
| 277 | Stubs of the first kind go in a new section immediately before the |
| 278 | target function. Stubs of the second kind go in a single section |
| 279 | pointed to by the hash table's "strampoline" field. */ |
| 280 | struct mips_elf_la25_stub { |
| 281 | /* The generated section that contains this stub. */ |
| 282 | asection *stub_section; |
| 283 | |
| 284 | /* The offset of the stub from the start of STUB_SECTION. */ |
| 285 | bfd_vma offset; |
| 286 | |
| 287 | /* One symbol for the original function. Its location is available |
| 288 | in H->root.root.u.def. */ |
| 289 | struct mips_elf_link_hash_entry *h; |
| 290 | }; |
| 291 | |
| 292 | /* Macros for populating a mips_elf_la25_stub. */ |
| 293 | |
| 294 | #define LA25_LUI(VAL) (0x3c190000 | (VAL)) /* lui t9,VAL */ |
| 295 | #define LA25_J(VAL) (0x08000000 | (((VAL) >> 2) & 0x3ffffff)) /* j VAL */ |
| 296 | #define LA25_BC(VAL) (0xc8000000 | (((VAL) >> 2) & 0x3ffffff)) /* bc VAL */ |
| 297 | #define LA25_ADDIU(VAL) (0x27390000 | (VAL)) /* addiu t9,t9,VAL */ |
| 298 | #define LA25_LUI_MICROMIPS(VAL) \ |
| 299 | (0x41b90000 | (VAL)) /* lui t9,VAL */ |
| 300 | #define LA25_J_MICROMIPS(VAL) \ |
| 301 | (0xd4000000 | (((VAL) >> 1) & 0x3ffffff)) /* j VAL */ |
| 302 | #define LA25_ADDIU_MICROMIPS(VAL) \ |
| 303 | (0x33390000 | (VAL)) /* addiu t9,t9,VAL */ |
| 304 | |
| 305 | /* This structure is passed to mips_elf_sort_hash_table_f when sorting |
| 306 | the dynamic symbols. */ |
| 307 | |
| 308 | struct mips_elf_hash_sort_data |
| 309 | { |
| 310 | /* The symbol in the global GOT with the lowest dynamic symbol table |
| 311 | index. */ |
| 312 | struct elf_link_hash_entry *low; |
| 313 | /* The least dynamic symbol table index corresponding to a non-TLS |
| 314 | symbol with a GOT entry. */ |
| 315 | bfd_size_type min_got_dynindx; |
| 316 | /* The greatest dynamic symbol table index corresponding to a symbol |
| 317 | with a GOT entry that is not referenced (e.g., a dynamic symbol |
| 318 | with dynamic relocations pointing to it from non-primary GOTs). */ |
| 319 | bfd_size_type max_unref_got_dynindx; |
| 320 | /* The greatest dynamic symbol table index corresponding to a local |
| 321 | symbol. */ |
| 322 | bfd_size_type max_local_dynindx; |
| 323 | /* The greatest dynamic symbol table index corresponding to an external |
| 324 | symbol without a GOT entry. */ |
| 325 | bfd_size_type max_non_got_dynindx; |
| 326 | /* If non-NULL, output BFD for .MIPS.xhash finalization. */ |
| 327 | bfd *output_bfd; |
| 328 | /* If non-NULL, pointer to contents of .MIPS.xhash for filling in |
| 329 | real final dynindx. */ |
| 330 | bfd_byte *mipsxhash; |
| 331 | }; |
| 332 | |
| 333 | /* We make up to two PLT entries if needed, one for standard MIPS code |
| 334 | and one for compressed code, either a MIPS16 or microMIPS one. We |
| 335 | keep a separate record of traditional lazy-binding stubs, for easier |
| 336 | processing. */ |
| 337 | |
| 338 | struct plt_entry |
| 339 | { |
| 340 | /* Traditional SVR4 stub offset, or -1 if none. */ |
| 341 | bfd_vma stub_offset; |
| 342 | |
| 343 | /* Standard PLT entry offset, or -1 if none. */ |
| 344 | bfd_vma mips_offset; |
| 345 | |
| 346 | /* Compressed PLT entry offset, or -1 if none. */ |
| 347 | bfd_vma comp_offset; |
| 348 | |
| 349 | /* The corresponding .got.plt index, or -1 if none. */ |
| 350 | bfd_vma gotplt_index; |
| 351 | |
| 352 | /* Whether we need a standard PLT entry. */ |
| 353 | unsigned int need_mips : 1; |
| 354 | |
| 355 | /* Whether we need a compressed PLT entry. */ |
| 356 | unsigned int need_comp : 1; |
| 357 | }; |
| 358 | |
| 359 | /* The MIPS ELF linker needs additional information for each symbol in |
| 360 | the global hash table. */ |
| 361 | |
| 362 | struct mips_elf_link_hash_entry |
| 363 | { |
| 364 | struct elf_link_hash_entry root; |
| 365 | |
| 366 | /* External symbol information. */ |
| 367 | EXTR esym; |
| 368 | |
| 369 | /* The la25 stub we have created for ths symbol, if any. */ |
| 370 | struct mips_elf_la25_stub *la25_stub; |
| 371 | |
| 372 | /* Number of R_MIPS_32, R_MIPS_REL32, or R_MIPS_64 relocs against |
| 373 | this symbol. */ |
| 374 | unsigned int possibly_dynamic_relocs; |
| 375 | |
| 376 | /* If there is a stub that 32 bit functions should use to call this |
| 377 | 16 bit function, this points to the section containing the stub. */ |
| 378 | asection *fn_stub; |
| 379 | |
| 380 | /* If there is a stub that 16 bit functions should use to call this |
| 381 | 32 bit function, this points to the section containing the stub. */ |
| 382 | asection *call_stub; |
| 383 | |
| 384 | /* This is like the call_stub field, but it is used if the function |
| 385 | being called returns a floating point value. */ |
| 386 | asection *call_fp_stub; |
| 387 | |
| 388 | /* If non-zero, location in .MIPS.xhash to write real final dynindx. */ |
| 389 | bfd_vma mipsxhash_loc; |
| 390 | |
| 391 | /* The highest GGA_* value that satisfies all references to this symbol. */ |
| 392 | unsigned int global_got_area : 2; |
| 393 | |
| 394 | /* True if all GOT relocations against this symbol are for calls. This is |
| 395 | a looser condition than no_fn_stub below, because there may be other |
| 396 | non-call non-GOT relocations against the symbol. */ |
| 397 | unsigned int got_only_for_calls : 1; |
| 398 | |
| 399 | /* True if one of the relocations described by possibly_dynamic_relocs |
| 400 | is against a readonly section. */ |
| 401 | unsigned int readonly_reloc : 1; |
| 402 | |
| 403 | /* True if there is a relocation against this symbol that must be |
| 404 | resolved by the static linker (in other words, if the relocation |
| 405 | cannot possibly be made dynamic). */ |
| 406 | unsigned int has_static_relocs : 1; |
| 407 | |
| 408 | /* True if we must not create a .MIPS.stubs entry for this symbol. |
| 409 | This is set, for example, if there are relocations related to |
| 410 | taking the function's address, i.e. any but R_MIPS_CALL*16 ones. |
| 411 | See "MIPS ABI Supplement, 3rd Edition", p. 4-20. */ |
| 412 | unsigned int no_fn_stub : 1; |
| 413 | |
| 414 | /* Whether we need the fn_stub; this is true if this symbol appears |
| 415 | in any relocs other than a 16 bit call. */ |
| 416 | unsigned int need_fn_stub : 1; |
| 417 | |
| 418 | /* True if this symbol is referenced by branch relocations from |
| 419 | any non-PIC input file. This is used to determine whether an |
| 420 | la25 stub is required. */ |
| 421 | unsigned int has_nonpic_branches : 1; |
| 422 | |
| 423 | /* Does this symbol need a traditional MIPS lazy-binding stub |
| 424 | (as opposed to a PLT entry)? */ |
| 425 | unsigned int needs_lazy_stub : 1; |
| 426 | |
| 427 | /* Does this symbol resolve to a PLT entry? */ |
| 428 | unsigned int use_plt_entry : 1; |
| 429 | }; |
| 430 | |
| 431 | /* MIPS ELF linker hash table. */ |
| 432 | |
| 433 | struct mips_elf_link_hash_table |
| 434 | { |
| 435 | struct elf_link_hash_table root; |
| 436 | |
| 437 | /* The number of .rtproc entries. */ |
| 438 | bfd_size_type procedure_count; |
| 439 | |
| 440 | /* The size of the .compact_rel section (if SGI_COMPAT). */ |
| 441 | bfd_size_type compact_rel_size; |
| 442 | |
| 443 | /* This flag indicates that the value of DT_MIPS_RLD_MAP dynamic entry |
| 444 | is set to the address of __rld_obj_head as in IRIX5 and IRIX6. */ |
| 445 | bfd_boolean use_rld_obj_head; |
| 446 | |
| 447 | /* The __rld_map or __rld_obj_head symbol. */ |
| 448 | struct elf_link_hash_entry *rld_symbol; |
| 449 | |
| 450 | /* This is set if we see any mips16 stub sections. */ |
| 451 | bfd_boolean mips16_stubs_seen; |
| 452 | |
| 453 | /* True if we can generate copy relocs and PLTs. */ |
| 454 | bfd_boolean use_plts_and_copy_relocs; |
| 455 | |
| 456 | /* True if we can only use 32-bit microMIPS instructions. */ |
| 457 | bfd_boolean insn32; |
| 458 | |
| 459 | /* True if we suppress checks for invalid branches between ISA modes. */ |
| 460 | bfd_boolean ignore_branch_isa; |
| 461 | |
| 462 | /* True if we are targetting R6 compact branches. */ |
| 463 | bfd_boolean compact_branches; |
| 464 | |
| 465 | /* True if we're generating code for VxWorks. */ |
| 466 | bfd_boolean is_vxworks; |
| 467 | |
| 468 | /* True if we already reported the small-data section overflow. */ |
| 469 | bfd_boolean small_data_overflow_reported; |
| 470 | |
| 471 | /* True if we use the special `__gnu_absolute_zero' symbol. */ |
| 472 | bfd_boolean use_absolute_zero; |
| 473 | |
| 474 | /* True if we have been configured for a GNU target. */ |
| 475 | bfd_boolean gnu_target; |
| 476 | |
| 477 | /* Shortcuts to some dynamic sections, or NULL if they are not |
| 478 | being used. */ |
| 479 | asection *srelplt2; |
| 480 | asection *sstubs; |
| 481 | |
| 482 | /* The master GOT information. */ |
| 483 | struct mips_got_info *got_info; |
| 484 | |
| 485 | /* The global symbol in the GOT with the lowest index in the dynamic |
| 486 | symbol table. */ |
| 487 | struct elf_link_hash_entry *global_gotsym; |
| 488 | |
| 489 | /* The size of the PLT header in bytes. */ |
| 490 | bfd_vma plt_header_size; |
| 491 | |
| 492 | /* The size of a standard PLT entry in bytes. */ |
| 493 | bfd_vma plt_mips_entry_size; |
| 494 | |
| 495 | /* The size of a compressed PLT entry in bytes. */ |
| 496 | bfd_vma plt_comp_entry_size; |
| 497 | |
| 498 | /* The offset of the next standard PLT entry to create. */ |
| 499 | bfd_vma plt_mips_offset; |
| 500 | |
| 501 | /* The offset of the next compressed PLT entry to create. */ |
| 502 | bfd_vma plt_comp_offset; |
| 503 | |
| 504 | /* The index of the next .got.plt entry to create. */ |
| 505 | bfd_vma plt_got_index; |
| 506 | |
| 507 | /* The number of functions that need a lazy-binding stub. */ |
| 508 | bfd_vma lazy_stub_count; |
| 509 | |
| 510 | /* The size of a function stub entry in bytes. */ |
| 511 | bfd_vma function_stub_size; |
| 512 | |
| 513 | /* The number of reserved entries at the beginning of the GOT. */ |
| 514 | unsigned int reserved_gotno; |
| 515 | |
| 516 | /* The section used for mips_elf_la25_stub trampolines. |
| 517 | See the comment above that structure for details. */ |
| 518 | asection *strampoline; |
| 519 | |
| 520 | /* A table of mips_elf_la25_stubs, indexed by (input_section, offset) |
| 521 | pairs. */ |
| 522 | htab_t la25_stubs; |
| 523 | |
| 524 | /* A function FN (NAME, IS, OS) that creates a new input section |
| 525 | called NAME and links it to output section OS. If IS is nonnull, |
| 526 | the new section should go immediately before it, otherwise it |
| 527 | should go at the (current) beginning of OS. |
| 528 | |
| 529 | The function returns the new section on success, otherwise it |
| 530 | returns null. */ |
| 531 | asection *(*add_stub_section) (const char *, asection *, asection *); |
| 532 | |
| 533 | /* Small local sym cache. */ |
| 534 | struct sym_cache sym_cache; |
| 535 | |
| 536 | /* Is the PLT header compressed? */ |
| 537 | unsigned int plt_header_is_comp : 1; |
| 538 | }; |
| 539 | |
| 540 | /* Get the MIPS ELF linker hash table from a link_info structure. */ |
| 541 | |
| 542 | #define mips_elf_hash_table(p) \ |
| 543 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 544 | == MIPS_ELF_DATA ? ((struct mips_elf_link_hash_table *) ((p)->hash)) : NULL) |
| 545 | |
| 546 | /* A structure used to communicate with htab_traverse callbacks. */ |
| 547 | struct mips_htab_traverse_info |
| 548 | { |
| 549 | /* The usual link-wide information. */ |
| 550 | struct bfd_link_info *info; |
| 551 | bfd *output_bfd; |
| 552 | |
| 553 | /* Starts off FALSE and is set to TRUE if the link should be aborted. */ |
| 554 | bfd_boolean error; |
| 555 | }; |
| 556 | |
| 557 | /* MIPS ELF private object data. */ |
| 558 | |
| 559 | struct mips_elf_obj_tdata |
| 560 | { |
| 561 | /* Generic ELF private object data. */ |
| 562 | struct elf_obj_tdata root; |
| 563 | |
| 564 | /* Input BFD providing Tag_GNU_MIPS_ABI_FP attribute for output. */ |
| 565 | bfd *abi_fp_bfd; |
| 566 | |
| 567 | /* Input BFD providing Tag_GNU_MIPS_ABI_MSA attribute for output. */ |
| 568 | bfd *abi_msa_bfd; |
| 569 | |
| 570 | /* The abiflags for this object. */ |
| 571 | Elf_Internal_ABIFlags_v0 abiflags; |
| 572 | bfd_boolean abiflags_valid; |
| 573 | |
| 574 | /* The GOT requirements of input bfds. */ |
| 575 | struct mips_got_info *got; |
| 576 | |
| 577 | /* Used by _bfd_mips_elf_find_nearest_line. The structure could be |
| 578 | included directly in this one, but there's no point to wasting |
| 579 | the memory just for the infrequently called find_nearest_line. */ |
| 580 | struct mips_elf_find_line *find_line_info; |
| 581 | |
| 582 | /* An array of stub sections indexed by symbol number. */ |
| 583 | asection **local_stubs; |
| 584 | asection **local_call_stubs; |
| 585 | |
| 586 | /* The Irix 5 support uses two virtual sections, which represent |
| 587 | text/data symbols defined in dynamic objects. */ |
| 588 | asymbol *elf_data_symbol; |
| 589 | asymbol *elf_text_symbol; |
| 590 | asection *elf_data_section; |
| 591 | asection *elf_text_section; |
| 592 | }; |
| 593 | |
| 594 | /* Get MIPS ELF private object data from BFD's tdata. */ |
| 595 | |
| 596 | #define mips_elf_tdata(bfd) \ |
| 597 | ((struct mips_elf_obj_tdata *) (bfd)->tdata.any) |
| 598 | |
| 599 | #define TLS_RELOC_P(r_type) \ |
| 600 | (r_type == R_MIPS_TLS_DTPMOD32 \ |
| 601 | || r_type == R_MIPS_TLS_DTPMOD64 \ |
| 602 | || r_type == R_MIPS_TLS_DTPREL32 \ |
| 603 | || r_type == R_MIPS_TLS_DTPREL64 \ |
| 604 | || r_type == R_MIPS_TLS_GD \ |
| 605 | || r_type == R_MIPS_TLS_LDM \ |
| 606 | || r_type == R_MIPS_TLS_DTPREL_HI16 \ |
| 607 | || r_type == R_MIPS_TLS_DTPREL_LO16 \ |
| 608 | || r_type == R_MIPS_TLS_GOTTPREL \ |
| 609 | || r_type == R_MIPS_TLS_TPREL32 \ |
| 610 | || r_type == R_MIPS_TLS_TPREL64 \ |
| 611 | || r_type == R_MIPS_TLS_TPREL_HI16 \ |
| 612 | || r_type == R_MIPS_TLS_TPREL_LO16 \ |
| 613 | || r_type == R_MIPS16_TLS_GD \ |
| 614 | || r_type == R_MIPS16_TLS_LDM \ |
| 615 | || r_type == R_MIPS16_TLS_DTPREL_HI16 \ |
| 616 | || r_type == R_MIPS16_TLS_DTPREL_LO16 \ |
| 617 | || r_type == R_MIPS16_TLS_GOTTPREL \ |
| 618 | || r_type == R_MIPS16_TLS_TPREL_HI16 \ |
| 619 | || r_type == R_MIPS16_TLS_TPREL_LO16 \ |
| 620 | || r_type == R_MICROMIPS_TLS_GD \ |
| 621 | || r_type == R_MICROMIPS_TLS_LDM \ |
| 622 | || r_type == R_MICROMIPS_TLS_DTPREL_HI16 \ |
| 623 | || r_type == R_MICROMIPS_TLS_DTPREL_LO16 \ |
| 624 | || r_type == R_MICROMIPS_TLS_GOTTPREL \ |
| 625 | || r_type == R_MICROMIPS_TLS_TPREL_HI16 \ |
| 626 | || r_type == R_MICROMIPS_TLS_TPREL_LO16) |
| 627 | |
| 628 | /* Structure used to pass information to mips_elf_output_extsym. */ |
| 629 | |
| 630 | struct extsym_info |
| 631 | { |
| 632 | bfd *abfd; |
| 633 | struct bfd_link_info *info; |
| 634 | struct ecoff_debug_info *debug; |
| 635 | const struct ecoff_debug_swap *swap; |
| 636 | bfd_boolean failed; |
| 637 | }; |
| 638 | |
| 639 | /* The names of the runtime procedure table symbols used on IRIX5. */ |
| 640 | |
| 641 | static const char * const mips_elf_dynsym_rtproc_names[] = |
| 642 | { |
| 643 | "_procedure_table", |
| 644 | "_procedure_string_table", |
| 645 | "_procedure_table_size", |
| 646 | NULL |
| 647 | }; |
| 648 | |
| 649 | /* These structures are used to generate the .compact_rel section on |
| 650 | IRIX5. */ |
| 651 | |
| 652 | typedef struct |
| 653 | { |
| 654 | unsigned long id1; /* Always one? */ |
| 655 | unsigned long num; /* Number of compact relocation entries. */ |
| 656 | unsigned long id2; /* Always two? */ |
| 657 | unsigned long offset; /* The file offset of the first relocation. */ |
| 658 | unsigned long reserved0; /* Zero? */ |
| 659 | unsigned long reserved1; /* Zero? */ |
| 660 | } Elf32_compact_rel; |
| 661 | |
| 662 | typedef struct |
| 663 | { |
| 664 | bfd_byte id1[4]; |
| 665 | bfd_byte num[4]; |
| 666 | bfd_byte id2[4]; |
| 667 | bfd_byte offset[4]; |
| 668 | bfd_byte reserved0[4]; |
| 669 | bfd_byte reserved1[4]; |
| 670 | } Elf32_External_compact_rel; |
| 671 | |
| 672 | typedef struct |
| 673 | { |
| 674 | unsigned int ctype : 1; /* 1: long 0: short format. See below. */ |
| 675 | unsigned int rtype : 4; /* Relocation types. See below. */ |
| 676 | unsigned int dist2to : 8; |
| 677 | unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */ |
| 678 | unsigned long konst; /* KONST field. See below. */ |
| 679 | unsigned long vaddr; /* VADDR to be relocated. */ |
| 680 | } Elf32_crinfo; |
| 681 | |
| 682 | typedef struct |
| 683 | { |
| 684 | unsigned int ctype : 1; /* 1: long 0: short format. See below. */ |
| 685 | unsigned int rtype : 4; /* Relocation types. See below. */ |
| 686 | unsigned int dist2to : 8; |
| 687 | unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */ |
| 688 | unsigned long konst; /* KONST field. See below. */ |
| 689 | } Elf32_crinfo2; |
| 690 | |
| 691 | typedef struct |
| 692 | { |
| 693 | bfd_byte info[4]; |
| 694 | bfd_byte konst[4]; |
| 695 | bfd_byte vaddr[4]; |
| 696 | } Elf32_External_crinfo; |
| 697 | |
| 698 | typedef struct |
| 699 | { |
| 700 | bfd_byte info[4]; |
| 701 | bfd_byte konst[4]; |
| 702 | } Elf32_External_crinfo2; |
| 703 | |
| 704 | /* These are the constants used to swap the bitfields in a crinfo. */ |
| 705 | |
| 706 | #define CRINFO_CTYPE (0x1) |
| 707 | #define CRINFO_CTYPE_SH (31) |
| 708 | #define CRINFO_RTYPE (0xf) |
| 709 | #define CRINFO_RTYPE_SH (27) |
| 710 | #define CRINFO_DIST2TO (0xff) |
| 711 | #define CRINFO_DIST2TO_SH (19) |
| 712 | #define CRINFO_RELVADDR (0x7ffff) |
| 713 | #define CRINFO_RELVADDR_SH (0) |
| 714 | |
| 715 | /* A compact relocation info has long (3 words) or short (2 words) |
| 716 | formats. A short format doesn't have VADDR field and relvaddr |
| 717 | fields contains ((VADDR - vaddr of the previous entry) >> 2). */ |
| 718 | #define CRF_MIPS_LONG 1 |
| 719 | #define CRF_MIPS_SHORT 0 |
| 720 | |
| 721 | /* There are 4 types of compact relocation at least. The value KONST |
| 722 | has different meaning for each type: |
| 723 | |
| 724 | (type) (konst) |
| 725 | CT_MIPS_REL32 Address in data |
| 726 | CT_MIPS_WORD Address in word (XXX) |
| 727 | CT_MIPS_GPHI_LO GP - vaddr |
| 728 | CT_MIPS_JMPAD Address to jump |
| 729 | */ |
| 730 | |
| 731 | #define CRT_MIPS_REL32 0xa |
| 732 | #define CRT_MIPS_WORD 0xb |
| 733 | #define CRT_MIPS_GPHI_LO 0xc |
| 734 | #define CRT_MIPS_JMPAD 0xd |
| 735 | |
| 736 | #define mips_elf_set_cr_format(x,format) ((x).ctype = (format)) |
| 737 | #define mips_elf_set_cr_type(x,type) ((x).rtype = (type)) |
| 738 | #define mips_elf_set_cr_dist2to(x,v) ((x).dist2to = (v)) |
| 739 | #define mips_elf_set_cr_relvaddr(x,d) ((x).relvaddr = (d)<<2) |
| 740 | \f |
| 741 | /* The structure of the runtime procedure descriptor created by the |
| 742 | loader for use by the static exception system. */ |
| 743 | |
| 744 | typedef struct runtime_pdr { |
| 745 | bfd_vma adr; /* Memory address of start of procedure. */ |
| 746 | long regmask; /* Save register mask. */ |
| 747 | long regoffset; /* Save register offset. */ |
| 748 | long fregmask; /* Save floating point register mask. */ |
| 749 | long fregoffset; /* Save floating point register offset. */ |
| 750 | long frameoffset; /* Frame size. */ |
| 751 | short framereg; /* Frame pointer register. */ |
| 752 | short pcreg; /* Offset or reg of return pc. */ |
| 753 | long irpss; /* Index into the runtime string table. */ |
| 754 | long reserved; |
| 755 | struct exception_info *exception_info;/* Pointer to exception array. */ |
| 756 | } RPDR, *pRPDR; |
| 757 | #define cbRPDR sizeof (RPDR) |
| 758 | #define rpdNil ((pRPDR) 0) |
| 759 | \f |
| 760 | static struct mips_got_entry *mips_elf_create_local_got_entry |
| 761 | (bfd *, struct bfd_link_info *, bfd *, bfd_vma, unsigned long, |
| 762 | struct mips_elf_link_hash_entry *, int); |
| 763 | static bfd_boolean mips_elf_sort_hash_table_f |
| 764 | (struct mips_elf_link_hash_entry *, void *); |
| 765 | static bfd_vma mips_elf_high |
| 766 | (bfd_vma); |
| 767 | static bfd_boolean mips_elf_create_dynamic_relocation |
| 768 | (bfd *, struct bfd_link_info *, const Elf_Internal_Rela *, |
| 769 | struct mips_elf_link_hash_entry *, asection *, bfd_vma, |
| 770 | bfd_vma *, asection *); |
| 771 | static bfd_vma mips_elf_adjust_gp |
| 772 | (bfd *, struct mips_got_info *, bfd *); |
| 773 | |
| 774 | /* This will be used when we sort the dynamic relocation records. */ |
| 775 | static bfd *reldyn_sorting_bfd; |
| 776 | |
| 777 | /* True if ABFD is for CPUs with load interlocking that include |
| 778 | non-MIPS1 CPUs and R3900. */ |
| 779 | #define LOAD_INTERLOCKS_P(abfd) \ |
| 780 | ( ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) != E_MIPS_ARCH_1) \ |
| 781 | || ((elf_elfheader (abfd)->e_flags & EF_MIPS_MACH) == E_MIPS_MACH_3900)) |
| 782 | |
| 783 | /* True if ABFD is for CPUs that are faster if JAL is converted to BAL. |
| 784 | This should be safe for all architectures. We enable this predicate |
| 785 | for RM9000 for now. */ |
| 786 | #define JAL_TO_BAL_P(abfd) \ |
| 787 | ((elf_elfheader (abfd)->e_flags & EF_MIPS_MACH) == E_MIPS_MACH_9000) |
| 788 | |
| 789 | /* True if ABFD is for CPUs that are faster if JALR is converted to BAL. |
| 790 | This should be safe for all architectures. We enable this predicate for |
| 791 | all CPUs. */ |
| 792 | #define JALR_TO_BAL_P(abfd) 1 |
| 793 | |
| 794 | /* True if ABFD is for CPUs that are faster if JR is converted to B. |
| 795 | This should be safe for all architectures. We enable this predicate for |
| 796 | all CPUs. */ |
| 797 | #define JR_TO_B_P(abfd) 1 |
| 798 | |
| 799 | /* True if ABFD is a PIC object. */ |
| 800 | #define PIC_OBJECT_P(abfd) \ |
| 801 | ((elf_elfheader (abfd)->e_flags & EF_MIPS_PIC) != 0) |
| 802 | |
| 803 | /* Nonzero if ABFD is using the O32 ABI. */ |
| 804 | #define ABI_O32_P(abfd) \ |
| 805 | ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_O32) |
| 806 | |
| 807 | /* Nonzero if ABFD is using the N32 ABI. */ |
| 808 | #define ABI_N32_P(abfd) \ |
| 809 | ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0) |
| 810 | |
| 811 | /* Nonzero if ABFD is using the N64 ABI. */ |
| 812 | #define ABI_64_P(abfd) \ |
| 813 | (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64) |
| 814 | |
| 815 | /* Nonzero if ABFD is using NewABI conventions. */ |
| 816 | #define NEWABI_P(abfd) (ABI_N32_P (abfd) || ABI_64_P (abfd)) |
| 817 | |
| 818 | /* Nonzero if ABFD has microMIPS code. */ |
| 819 | #define MICROMIPS_P(abfd) \ |
| 820 | ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_MICROMIPS) != 0) |
| 821 | |
| 822 | /* Nonzero if ABFD is MIPS R6. */ |
| 823 | #define MIPSR6_P(abfd) \ |
| 824 | ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32R6 \ |
| 825 | || (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_64R6) |
| 826 | |
| 827 | /* The IRIX compatibility level we are striving for. */ |
| 828 | #define IRIX_COMPAT(abfd) \ |
| 829 | (get_elf_backend_data (abfd)->elf_backend_mips_irix_compat (abfd)) |
| 830 | |
| 831 | /* Whether we are trying to be compatible with IRIX at all. */ |
| 832 | #define SGI_COMPAT(abfd) \ |
| 833 | (IRIX_COMPAT (abfd) != ict_none) |
| 834 | |
| 835 | /* The name of the options section. */ |
| 836 | #define MIPS_ELF_OPTIONS_SECTION_NAME(abfd) \ |
| 837 | (NEWABI_P (abfd) ? ".MIPS.options" : ".options") |
| 838 | |
| 839 | /* True if NAME is the recognized name of any SHT_MIPS_OPTIONS section. |
| 840 | Some IRIX system files do not use MIPS_ELF_OPTIONS_SECTION_NAME. */ |
| 841 | #define MIPS_ELF_OPTIONS_SECTION_NAME_P(NAME) \ |
| 842 | (strcmp (NAME, ".MIPS.options") == 0 || strcmp (NAME, ".options") == 0) |
| 843 | |
| 844 | /* True if NAME is the recognized name of any SHT_MIPS_ABIFLAGS section. */ |
| 845 | #define MIPS_ELF_ABIFLAGS_SECTION_NAME_P(NAME) \ |
| 846 | (strcmp (NAME, ".MIPS.abiflags") == 0) |
| 847 | |
| 848 | /* Whether the section is readonly. */ |
| 849 | #define MIPS_ELF_READONLY_SECTION(sec) \ |
| 850 | ((sec->flags & (SEC_ALLOC | SEC_LOAD | SEC_READONLY)) \ |
| 851 | == (SEC_ALLOC | SEC_LOAD | SEC_READONLY)) |
| 852 | |
| 853 | /* The name of the stub section. */ |
| 854 | #define MIPS_ELF_STUB_SECTION_NAME(abfd) ".MIPS.stubs" |
| 855 | |
| 856 | /* The size of an external REL relocation. */ |
| 857 | #define MIPS_ELF_REL_SIZE(abfd) \ |
| 858 | (get_elf_backend_data (abfd)->s->sizeof_rel) |
| 859 | |
| 860 | /* The size of an external RELA relocation. */ |
| 861 | #define MIPS_ELF_RELA_SIZE(abfd) \ |
| 862 | (get_elf_backend_data (abfd)->s->sizeof_rela) |
| 863 | |
| 864 | /* The size of an external dynamic table entry. */ |
| 865 | #define MIPS_ELF_DYN_SIZE(abfd) \ |
| 866 | (get_elf_backend_data (abfd)->s->sizeof_dyn) |
| 867 | |
| 868 | /* The size of a GOT entry. */ |
| 869 | #define MIPS_ELF_GOT_SIZE(abfd) \ |
| 870 | (get_elf_backend_data (abfd)->s->arch_size / 8) |
| 871 | |
| 872 | /* The size of the .rld_map section. */ |
| 873 | #define MIPS_ELF_RLD_MAP_SIZE(abfd) \ |
| 874 | (get_elf_backend_data (abfd)->s->arch_size / 8) |
| 875 | |
| 876 | /* The size of a symbol-table entry. */ |
| 877 | #define MIPS_ELF_SYM_SIZE(abfd) \ |
| 878 | (get_elf_backend_data (abfd)->s->sizeof_sym) |
| 879 | |
| 880 | /* The default alignment for sections, as a power of two. */ |
| 881 | #define MIPS_ELF_LOG_FILE_ALIGN(abfd) \ |
| 882 | (get_elf_backend_data (abfd)->s->log_file_align) |
| 883 | |
| 884 | /* Get word-sized data. */ |
| 885 | #define MIPS_ELF_GET_WORD(abfd, ptr) \ |
| 886 | (ABI_64_P (abfd) ? bfd_get_64 (abfd, ptr) : bfd_get_32 (abfd, ptr)) |
| 887 | |
| 888 | /* Put out word-sized data. */ |
| 889 | #define MIPS_ELF_PUT_WORD(abfd, val, ptr) \ |
| 890 | (ABI_64_P (abfd) \ |
| 891 | ? bfd_put_64 (abfd, val, ptr) \ |
| 892 | : bfd_put_32 (abfd, val, ptr)) |
| 893 | |
| 894 | /* The opcode for word-sized loads (LW or LD). */ |
| 895 | #define MIPS_ELF_LOAD_WORD(abfd) \ |
| 896 | (ABI_64_P (abfd) ? 0xdc000000 : 0x8c000000) |
| 897 | |
| 898 | /* Add a dynamic symbol table-entry. */ |
| 899 | #define MIPS_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \ |
| 900 | _bfd_elf_add_dynamic_entry (info, tag, val) |
| 901 | |
| 902 | #define MIPS_ELF_RTYPE_TO_HOWTO(abfd, rtype, rela) \ |
| 903 | (get_elf_backend_data (abfd)->elf_backend_mips_rtype_to_howto (abfd, rtype, rela)) |
| 904 | |
| 905 | /* The name of the dynamic relocation section. */ |
| 906 | #define MIPS_ELF_REL_DYN_NAME(INFO) \ |
| 907 | (mips_elf_hash_table (INFO)->is_vxworks ? ".rela.dyn" : ".rel.dyn") |
| 908 | |
| 909 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
| 910 | from smaller values. Start with zero, widen, *then* decrement. */ |
| 911 | #define MINUS_ONE (((bfd_vma)0) - 1) |
| 912 | #define MINUS_TWO (((bfd_vma)0) - 2) |
| 913 | |
| 914 | /* The value to write into got[1] for SVR4 targets, to identify it is |
| 915 | a GNU object. The dynamic linker can then use got[1] to store the |
| 916 | module pointer. */ |
| 917 | #define MIPS_ELF_GNU_GOT1_MASK(abfd) \ |
| 918 | ((bfd_vma) 1 << (ABI_64_P (abfd) ? 63 : 31)) |
| 919 | |
| 920 | /* The offset of $gp from the beginning of the .got section. */ |
| 921 | #define ELF_MIPS_GP_OFFSET(INFO) \ |
| 922 | (mips_elf_hash_table (INFO)->is_vxworks ? 0x0 : 0x7ff0) |
| 923 | |
| 924 | /* The maximum size of the GOT for it to be addressable using 16-bit |
| 925 | offsets from $gp. */ |
| 926 | #define MIPS_ELF_GOT_MAX_SIZE(INFO) (ELF_MIPS_GP_OFFSET (INFO) + 0x7fff) |
| 927 | |
| 928 | /* Instructions which appear in a stub. */ |
| 929 | #define STUB_LW(abfd) \ |
| 930 | ((ABI_64_P (abfd) \ |
| 931 | ? 0xdf998010 /* ld t9,0x8010(gp) */ \ |
| 932 | : 0x8f998010)) /* lw t9,0x8010(gp) */ |
| 933 | #define STUB_MOVE 0x03e07825 /* or t7,ra,zero */ |
| 934 | #define STUB_LUI(VAL) (0x3c180000 + (VAL)) /* lui t8,VAL */ |
| 935 | #define STUB_JALR 0x0320f809 /* jalr ra,t9 */ |
| 936 | #define STUB_JALRC 0xf8190000 /* jalrc ra,t9 */ |
| 937 | #define STUB_ORI(VAL) (0x37180000 + (VAL)) /* ori t8,t8,VAL */ |
| 938 | #define STUB_LI16U(VAL) (0x34180000 + (VAL)) /* ori t8,zero,VAL unsigned */ |
| 939 | #define STUB_LI16S(abfd, VAL) \ |
| 940 | ((ABI_64_P (abfd) \ |
| 941 | ? (0x64180000 + (VAL)) /* daddiu t8,zero,VAL sign extended */ \ |
| 942 | : (0x24180000 + (VAL)))) /* addiu t8,zero,VAL sign extended */ |
| 943 | |
| 944 | /* Likewise for the microMIPS ASE. */ |
| 945 | #define STUB_LW_MICROMIPS(abfd) \ |
| 946 | (ABI_64_P (abfd) \ |
| 947 | ? 0xdf3c8010 /* ld t9,0x8010(gp) */ \ |
| 948 | : 0xff3c8010) /* lw t9,0x8010(gp) */ |
| 949 | #define STUB_MOVE_MICROMIPS 0x0dff /* move t7,ra */ |
| 950 | #define STUB_MOVE32_MICROMIPS 0x001f7a90 /* or t7,ra,zero */ |
| 951 | #define STUB_LUI_MICROMIPS(VAL) \ |
| 952 | (0x41b80000 + (VAL)) /* lui t8,VAL */ |
| 953 | #define STUB_JALR_MICROMIPS 0x45d9 /* jalr t9 */ |
| 954 | #define STUB_JALR32_MICROMIPS 0x03f90f3c /* jalr ra,t9 */ |
| 955 | #define STUB_ORI_MICROMIPS(VAL) \ |
| 956 | (0x53180000 + (VAL)) /* ori t8,t8,VAL */ |
| 957 | #define STUB_LI16U_MICROMIPS(VAL) \ |
| 958 | (0x53000000 + (VAL)) /* ori t8,zero,VAL unsigned */ |
| 959 | #define STUB_LI16S_MICROMIPS(abfd, VAL) \ |
| 960 | (ABI_64_P (abfd) \ |
| 961 | ? 0x5f000000 + (VAL) /* daddiu t8,zero,VAL sign extended */ \ |
| 962 | : 0x33000000 + (VAL)) /* addiu t8,zero,VAL sign extended */ |
| 963 | |
| 964 | #define MIPS_FUNCTION_STUB_NORMAL_SIZE 16 |
| 965 | #define MIPS_FUNCTION_STUB_BIG_SIZE 20 |
| 966 | #define MICROMIPS_FUNCTION_STUB_NORMAL_SIZE 12 |
| 967 | #define MICROMIPS_FUNCTION_STUB_BIG_SIZE 16 |
| 968 | #define MICROMIPS_INSN32_FUNCTION_STUB_NORMAL_SIZE 16 |
| 969 | #define MICROMIPS_INSN32_FUNCTION_STUB_BIG_SIZE 20 |
| 970 | |
| 971 | /* The name of the dynamic interpreter. This is put in the .interp |
| 972 | section. */ |
| 973 | |
| 974 | #define ELF_DYNAMIC_INTERPRETER(abfd) \ |
| 975 | (ABI_N32_P (abfd) ? "/usr/lib32/libc.so.1" \ |
| 976 | : ABI_64_P (abfd) ? "/usr/lib64/libc.so.1" \ |
| 977 | : "/usr/lib/libc.so.1") |
| 978 | |
| 979 | #ifdef BFD64 |
| 980 | #define MNAME(bfd,pre,pos) \ |
| 981 | (ABI_64_P (bfd) ? CONCAT4 (pre,64,_,pos) : CONCAT4 (pre,32,_,pos)) |
| 982 | #define ELF_R_SYM(bfd, i) \ |
| 983 | (ABI_64_P (bfd) ? ELF64_R_SYM (i) : ELF32_R_SYM (i)) |
| 984 | #define ELF_R_TYPE(bfd, i) \ |
| 985 | (ABI_64_P (bfd) ? ELF64_MIPS_R_TYPE (i) : ELF32_R_TYPE (i)) |
| 986 | #define ELF_R_INFO(bfd, s, t) \ |
| 987 | (ABI_64_P (bfd) ? ELF64_R_INFO (s, t) : ELF32_R_INFO (s, t)) |
| 988 | #else |
| 989 | #define MNAME(bfd,pre,pos) CONCAT4 (pre,32,_,pos) |
| 990 | #define ELF_R_SYM(bfd, i) \ |
| 991 | (ELF32_R_SYM (i)) |
| 992 | #define ELF_R_TYPE(bfd, i) \ |
| 993 | (ELF32_R_TYPE (i)) |
| 994 | #define ELF_R_INFO(bfd, s, t) \ |
| 995 | (ELF32_R_INFO (s, t)) |
| 996 | #endif |
| 997 | \f |
| 998 | /* The mips16 compiler uses a couple of special sections to handle |
| 999 | floating point arguments. |
| 1000 | |
| 1001 | Section names that look like .mips16.fn.FNNAME contain stubs that |
| 1002 | copy floating point arguments from the fp regs to the gp regs and |
| 1003 | then jump to FNNAME. If any 32 bit function calls FNNAME, the |
| 1004 | call should be redirected to the stub instead. If no 32 bit |
| 1005 | function calls FNNAME, the stub should be discarded. We need to |
| 1006 | consider any reference to the function, not just a call, because |
| 1007 | if the address of the function is taken we will need the stub, |
| 1008 | since the address might be passed to a 32 bit function. |
| 1009 | |
| 1010 | Section names that look like .mips16.call.FNNAME contain stubs |
| 1011 | that copy floating point arguments from the gp regs to the fp |
| 1012 | regs and then jump to FNNAME. If FNNAME is a 32 bit function, |
| 1013 | then any 16 bit function that calls FNNAME should be redirected |
| 1014 | to the stub instead. If FNNAME is not a 32 bit function, the |
| 1015 | stub should be discarded. |
| 1016 | |
| 1017 | .mips16.call.fp.FNNAME sections are similar, but contain stubs |
| 1018 | which call FNNAME and then copy the return value from the fp regs |
| 1019 | to the gp regs. These stubs store the return value in $18 while |
| 1020 | calling FNNAME; any function which might call one of these stubs |
| 1021 | must arrange to save $18 around the call. (This case is not |
| 1022 | needed for 32 bit functions that call 16 bit functions, because |
| 1023 | 16 bit functions always return floating point values in both |
| 1024 | $f0/$f1 and $2/$3.) |
| 1025 | |
| 1026 | Note that in all cases FNNAME might be defined statically. |
| 1027 | Therefore, FNNAME is not used literally. Instead, the relocation |
| 1028 | information will indicate which symbol the section is for. |
| 1029 | |
| 1030 | We record any stubs that we find in the symbol table. */ |
| 1031 | |
| 1032 | #define FN_STUB ".mips16.fn." |
| 1033 | #define CALL_STUB ".mips16.call." |
| 1034 | #define CALL_FP_STUB ".mips16.call.fp." |
| 1035 | |
| 1036 | #define FN_STUB_P(name) CONST_STRNEQ (name, FN_STUB) |
| 1037 | #define CALL_STUB_P(name) CONST_STRNEQ (name, CALL_STUB) |
| 1038 | #define CALL_FP_STUB_P(name) CONST_STRNEQ (name, CALL_FP_STUB) |
| 1039 | \f |
| 1040 | /* The format of the first PLT entry in an O32 executable. */ |
| 1041 | static const bfd_vma mips_o32_exec_plt0_entry[] = |
| 1042 | { |
| 1043 | 0x3c1c0000, /* lui $28, %hi(&GOTPLT[0]) */ |
| 1044 | 0x8f990000, /* lw $25, %lo(&GOTPLT[0])($28) */ |
| 1045 | 0x279c0000, /* addiu $28, $28, %lo(&GOTPLT[0]) */ |
| 1046 | 0x031cc023, /* subu $24, $24, $28 */ |
| 1047 | 0x03e07825, /* or t7, ra, zero */ |
| 1048 | 0x0018c082, /* srl $24, $24, 2 */ |
| 1049 | 0x0320f809, /* jalr $25 */ |
| 1050 | 0x2718fffe /* subu $24, $24, 2 */ |
| 1051 | }; |
| 1052 | |
| 1053 | /* The format of the first PLT entry in an O32 executable using compact |
| 1054 | jumps. */ |
| 1055 | static const bfd_vma mipsr6_o32_exec_plt0_entry_compact[] = |
| 1056 | { |
| 1057 | 0x3c1c0000, /* lui $28, %hi(&GOTPLT[0]) */ |
| 1058 | 0x8f990000, /* lw $25, %lo(&GOTPLT[0])($28) */ |
| 1059 | 0x279c0000, /* addiu $28, $28, %lo(&GOTPLT[0]) */ |
| 1060 | 0x031cc023, /* subu $24, $24, $28 */ |
| 1061 | 0x03e07821, /* move $15, $31 # 32-bit move (addu) */ |
| 1062 | 0x0018c082, /* srl $24, $24, 2 */ |
| 1063 | 0x2718fffe, /* subu $24, $24, 2 */ |
| 1064 | 0xf8190000 /* jalrc $25 */ |
| 1065 | }; |
| 1066 | |
| 1067 | /* The format of the first PLT entry in an N32 executable. Different |
| 1068 | because gp ($28) is not available; we use t2 ($14) instead. */ |
| 1069 | static const bfd_vma mips_n32_exec_plt0_entry[] = |
| 1070 | { |
| 1071 | 0x3c0e0000, /* lui $14, %hi(&GOTPLT[0]) */ |
| 1072 | 0x8dd90000, /* lw $25, %lo(&GOTPLT[0])($14) */ |
| 1073 | 0x25ce0000, /* addiu $14, $14, %lo(&GOTPLT[0]) */ |
| 1074 | 0x030ec023, /* subu $24, $24, $14 */ |
| 1075 | 0x03e07825, /* or t7, ra, zero */ |
| 1076 | 0x0018c082, /* srl $24, $24, 2 */ |
| 1077 | 0x0320f809, /* jalr $25 */ |
| 1078 | 0x2718fffe /* subu $24, $24, 2 */ |
| 1079 | }; |
| 1080 | |
| 1081 | /* The format of the first PLT entry in an N32 executable using compact |
| 1082 | jumps. Different because gp ($28) is not available; we use t2 ($14) |
| 1083 | instead. */ |
| 1084 | static const bfd_vma mipsr6_n32_exec_plt0_entry_compact[] = |
| 1085 | { |
| 1086 | 0x3c0e0000, /* lui $14, %hi(&GOTPLT[0]) */ |
| 1087 | 0x8dd90000, /* lw $25, %lo(&GOTPLT[0])($14) */ |
| 1088 | 0x25ce0000, /* addiu $14, $14, %lo(&GOTPLT[0]) */ |
| 1089 | 0x030ec023, /* subu $24, $24, $14 */ |
| 1090 | 0x03e07821, /* move $15, $31 # 32-bit move (addu) */ |
| 1091 | 0x0018c082, /* srl $24, $24, 2 */ |
| 1092 | 0x2718fffe, /* subu $24, $24, 2 */ |
| 1093 | 0xf8190000 /* jalrc $25 */ |
| 1094 | }; |
| 1095 | |
| 1096 | /* The format of the first PLT entry in an N64 executable. Different |
| 1097 | from N32 because of the increased size of GOT entries. */ |
| 1098 | static const bfd_vma mips_n64_exec_plt0_entry[] = |
| 1099 | { |
| 1100 | 0x3c0e0000, /* lui $14, %hi(&GOTPLT[0]) */ |
| 1101 | 0xddd90000, /* ld $25, %lo(&GOTPLT[0])($14) */ |
| 1102 | 0x25ce0000, /* addiu $14, $14, %lo(&GOTPLT[0]) */ |
| 1103 | 0x030ec023, /* subu $24, $24, $14 */ |
| 1104 | 0x03e07825, /* or t7, ra, zero */ |
| 1105 | 0x0018c0c2, /* srl $24, $24, 3 */ |
| 1106 | 0x0320f809, /* jalr $25 */ |
| 1107 | 0x2718fffe /* subu $24, $24, 2 */ |
| 1108 | }; |
| 1109 | |
| 1110 | /* The format of the first PLT entry in an N64 executable using compact |
| 1111 | jumps. Different from N32 because of the increased size of GOT |
| 1112 | entries. */ |
| 1113 | static const bfd_vma mipsr6_n64_exec_plt0_entry_compact[] = |
| 1114 | { |
| 1115 | 0x3c0e0000, /* lui $14, %hi(&GOTPLT[0]) */ |
| 1116 | 0xddd90000, /* ld $25, %lo(&GOTPLT[0])($14) */ |
| 1117 | 0x25ce0000, /* addiu $14, $14, %lo(&GOTPLT[0]) */ |
| 1118 | 0x030ec023, /* subu $24, $24, $14 */ |
| 1119 | 0x03e0782d, /* move $15, $31 # 64-bit move (daddu) */ |
| 1120 | 0x0018c0c2, /* srl $24, $24, 3 */ |
| 1121 | 0x2718fffe, /* subu $24, $24, 2 */ |
| 1122 | 0xf8190000 /* jalrc $25 */ |
| 1123 | }; |
| 1124 | |
| 1125 | |
| 1126 | /* The format of the microMIPS first PLT entry in an O32 executable. |
| 1127 | We rely on v0 ($2) rather than t8 ($24) to contain the address |
| 1128 | of the GOTPLT entry handled, so this stub may only be used when |
| 1129 | all the subsequent PLT entries are microMIPS code too. |
| 1130 | |
| 1131 | The trailing NOP is for alignment and correct disassembly only. */ |
| 1132 | static const bfd_vma micromips_o32_exec_plt0_entry[] = |
| 1133 | { |
| 1134 | 0x7980, 0x0000, /* addiupc $3, (&GOTPLT[0]) - . */ |
| 1135 | 0xff23, 0x0000, /* lw $25, 0($3) */ |
| 1136 | 0x0535, /* subu $2, $2, $3 */ |
| 1137 | 0x2525, /* srl $2, $2, 2 */ |
| 1138 | 0x3302, 0xfffe, /* subu $24, $2, 2 */ |
| 1139 | 0x0dff, /* move $15, $31 */ |
| 1140 | 0x45f9, /* jalrs $25 */ |
| 1141 | 0x0f83, /* move $28, $3 */ |
| 1142 | 0x0c00 /* nop */ |
| 1143 | }; |
| 1144 | |
| 1145 | /* The format of the microMIPS first PLT entry in an O32 executable |
| 1146 | in the insn32 mode. */ |
| 1147 | static const bfd_vma micromips_insn32_o32_exec_plt0_entry[] = |
| 1148 | { |
| 1149 | 0x41bc, 0x0000, /* lui $28, %hi(&GOTPLT[0]) */ |
| 1150 | 0xff3c, 0x0000, /* lw $25, %lo(&GOTPLT[0])($28) */ |
| 1151 | 0x339c, 0x0000, /* addiu $28, $28, %lo(&GOTPLT[0]) */ |
| 1152 | 0x0398, 0xc1d0, /* subu $24, $24, $28 */ |
| 1153 | 0x001f, 0x7a90, /* or $15, $31, zero */ |
| 1154 | 0x0318, 0x1040, /* srl $24, $24, 2 */ |
| 1155 | 0x03f9, 0x0f3c, /* jalr $25 */ |
| 1156 | 0x3318, 0xfffe /* subu $24, $24, 2 */ |
| 1157 | }; |
| 1158 | |
| 1159 | /* The format of subsequent standard PLT entries. */ |
| 1160 | static const bfd_vma mips_exec_plt_entry[] = |
| 1161 | { |
| 1162 | 0x3c0f0000, /* lui $15, %hi(.got.plt entry) */ |
| 1163 | 0x01f90000, /* l[wd] $25, %lo(.got.plt entry)($15) */ |
| 1164 | 0x25f80000, /* addiu $24, $15, %lo(.got.plt entry) */ |
| 1165 | 0x03200008 /* jr $25 */ |
| 1166 | }; |
| 1167 | |
| 1168 | static const bfd_vma mipsr6_exec_plt_entry[] = |
| 1169 | { |
| 1170 | 0x3c0f0000, /* lui $15, %hi(.got.plt entry) */ |
| 1171 | 0x01f90000, /* l[wd] $25, %lo(.got.plt entry)($15) */ |
| 1172 | 0x25f80000, /* addiu $24, $15, %lo(.got.plt entry) */ |
| 1173 | 0x03200009 /* jr $25 */ |
| 1174 | }; |
| 1175 | |
| 1176 | static const bfd_vma mipsr6_exec_plt_entry_compact[] = |
| 1177 | { |
| 1178 | 0x3c0f0000, /* lui $15, %hi(.got.plt entry) */ |
| 1179 | 0x01f90000, /* l[wd] $25, %lo(.got.plt entry)($15) */ |
| 1180 | 0x25f80000, /* addiu $24, $15, %lo(.got.plt entry) */ |
| 1181 | 0xd8190000 /* jic $25, 0 */ |
| 1182 | }; |
| 1183 | |
| 1184 | /* The format of subsequent MIPS16 o32 PLT entries. We use v0 ($2) |
| 1185 | and v1 ($3) as temporaries because t8 ($24) and t9 ($25) are not |
| 1186 | directly addressable. */ |
| 1187 | static const bfd_vma mips16_o32_exec_plt_entry[] = |
| 1188 | { |
| 1189 | 0xb203, /* lw $2, 12($pc) */ |
| 1190 | 0x9a60, /* lw $3, 0($2) */ |
| 1191 | 0x651a, /* move $24, $2 */ |
| 1192 | 0xeb00, /* jr $3 */ |
| 1193 | 0x653b, /* move $25, $3 */ |
| 1194 | 0x6500, /* nop */ |
| 1195 | 0x0000, 0x0000 /* .word (.got.plt entry) */ |
| 1196 | }; |
| 1197 | |
| 1198 | /* The format of subsequent microMIPS o32 PLT entries. We use v0 ($2) |
| 1199 | as a temporary because t8 ($24) is not addressable with ADDIUPC. */ |
| 1200 | static const bfd_vma micromips_o32_exec_plt_entry[] = |
| 1201 | { |
| 1202 | 0x7900, 0x0000, /* addiupc $2, (.got.plt entry) - . */ |
| 1203 | 0xff22, 0x0000, /* lw $25, 0($2) */ |
| 1204 | 0x4599, /* jr $25 */ |
| 1205 | 0x0f02 /* move $24, $2 */ |
| 1206 | }; |
| 1207 | |
| 1208 | /* The format of subsequent microMIPS o32 PLT entries in the insn32 mode. */ |
| 1209 | static const bfd_vma micromips_insn32_o32_exec_plt_entry[] = |
| 1210 | { |
| 1211 | 0x41af, 0x0000, /* lui $15, %hi(.got.plt entry) */ |
| 1212 | 0xff2f, 0x0000, /* lw $25, %lo(.got.plt entry)($15) */ |
| 1213 | 0x0019, 0x0f3c, /* jr $25 */ |
| 1214 | 0x330f, 0x0000 /* addiu $24, $15, %lo(.got.plt entry) */ |
| 1215 | }; |
| 1216 | |
| 1217 | /* The format of the first PLT entry in a VxWorks executable. */ |
| 1218 | static const bfd_vma mips_vxworks_exec_plt0_entry[] = |
| 1219 | { |
| 1220 | 0x3c190000, /* lui t9, %hi(_GLOBAL_OFFSET_TABLE_) */ |
| 1221 | 0x27390000, /* addiu t9, t9, %lo(_GLOBAL_OFFSET_TABLE_) */ |
| 1222 | 0x8f390008, /* lw t9, 8(t9) */ |
| 1223 | 0x00000000, /* nop */ |
| 1224 | 0x03200008, /* jr t9 */ |
| 1225 | 0x00000000 /* nop */ |
| 1226 | }; |
| 1227 | |
| 1228 | /* The format of subsequent PLT entries. */ |
| 1229 | static const bfd_vma mips_vxworks_exec_plt_entry[] = |
| 1230 | { |
| 1231 | 0x10000000, /* b .PLT_resolver */ |
| 1232 | 0x24180000, /* li t8, <pltindex> */ |
| 1233 | 0x3c190000, /* lui t9, %hi(<.got.plt slot>) */ |
| 1234 | 0x27390000, /* addiu t9, t9, %lo(<.got.plt slot>) */ |
| 1235 | 0x8f390000, /* lw t9, 0(t9) */ |
| 1236 | 0x00000000, /* nop */ |
| 1237 | 0x03200008, /* jr t9 */ |
| 1238 | 0x00000000 /* nop */ |
| 1239 | }; |
| 1240 | |
| 1241 | /* The format of the first PLT entry in a VxWorks shared object. */ |
| 1242 | static const bfd_vma mips_vxworks_shared_plt0_entry[] = |
| 1243 | { |
| 1244 | 0x8f990008, /* lw t9, 8(gp) */ |
| 1245 | 0x00000000, /* nop */ |
| 1246 | 0x03200008, /* jr t9 */ |
| 1247 | 0x00000000, /* nop */ |
| 1248 | 0x00000000, /* nop */ |
| 1249 | 0x00000000 /* nop */ |
| 1250 | }; |
| 1251 | |
| 1252 | /* The format of subsequent PLT entries. */ |
| 1253 | static const bfd_vma mips_vxworks_shared_plt_entry[] = |
| 1254 | { |
| 1255 | 0x10000000, /* b .PLT_resolver */ |
| 1256 | 0x24180000 /* li t8, <pltindex> */ |
| 1257 | }; |
| 1258 | \f |
| 1259 | /* microMIPS 32-bit opcode helper installer. */ |
| 1260 | |
| 1261 | static void |
| 1262 | bfd_put_micromips_32 (const bfd *abfd, bfd_vma opcode, bfd_byte *ptr) |
| 1263 | { |
| 1264 | bfd_put_16 (abfd, (opcode >> 16) & 0xffff, ptr); |
| 1265 | bfd_put_16 (abfd, opcode & 0xffff, ptr + 2); |
| 1266 | } |
| 1267 | |
| 1268 | /* microMIPS 32-bit opcode helper retriever. */ |
| 1269 | |
| 1270 | static bfd_vma |
| 1271 | bfd_get_micromips_32 (const bfd *abfd, const bfd_byte *ptr) |
| 1272 | { |
| 1273 | return (bfd_get_16 (abfd, ptr) << 16) | bfd_get_16 (abfd, ptr + 2); |
| 1274 | } |
| 1275 | \f |
| 1276 | /* Look up an entry in a MIPS ELF linker hash table. */ |
| 1277 | |
| 1278 | #define mips_elf_link_hash_lookup(table, string, create, copy, follow) \ |
| 1279 | ((struct mips_elf_link_hash_entry *) \ |
| 1280 | elf_link_hash_lookup (&(table)->root, (string), (create), \ |
| 1281 | (copy), (follow))) |
| 1282 | |
| 1283 | /* Traverse a MIPS ELF linker hash table. */ |
| 1284 | |
| 1285 | #define mips_elf_link_hash_traverse(table, func, info) \ |
| 1286 | (elf_link_hash_traverse \ |
| 1287 | (&(table)->root, \ |
| 1288 | (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ |
| 1289 | (info))) |
| 1290 | |
| 1291 | /* Find the base offsets for thread-local storage in this object, |
| 1292 | for GD/LD and IE/LE respectively. */ |
| 1293 | |
| 1294 | #define TP_OFFSET 0x7000 |
| 1295 | #define DTP_OFFSET 0x8000 |
| 1296 | |
| 1297 | static bfd_vma |
| 1298 | dtprel_base (struct bfd_link_info *info) |
| 1299 | { |
| 1300 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 1301 | if (elf_hash_table (info)->tls_sec == NULL) |
| 1302 | return 0; |
| 1303 | return elf_hash_table (info)->tls_sec->vma + DTP_OFFSET; |
| 1304 | } |
| 1305 | |
| 1306 | static bfd_vma |
| 1307 | tprel_base (struct bfd_link_info *info) |
| 1308 | { |
| 1309 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 1310 | if (elf_hash_table (info)->tls_sec == NULL) |
| 1311 | return 0; |
| 1312 | return elf_hash_table (info)->tls_sec->vma + TP_OFFSET; |
| 1313 | } |
| 1314 | |
| 1315 | /* Create an entry in a MIPS ELF linker hash table. */ |
| 1316 | |
| 1317 | static struct bfd_hash_entry * |
| 1318 | mips_elf_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 1319 | struct bfd_hash_table *table, const char *string) |
| 1320 | { |
| 1321 | struct mips_elf_link_hash_entry *ret = |
| 1322 | (struct mips_elf_link_hash_entry *) entry; |
| 1323 | |
| 1324 | /* Allocate the structure if it has not already been allocated by a |
| 1325 | subclass. */ |
| 1326 | if (ret == NULL) |
| 1327 | ret = bfd_hash_allocate (table, sizeof (struct mips_elf_link_hash_entry)); |
| 1328 | if (ret == NULL) |
| 1329 | return (struct bfd_hash_entry *) ret; |
| 1330 | |
| 1331 | /* Call the allocation method of the superclass. */ |
| 1332 | ret = ((struct mips_elf_link_hash_entry *) |
| 1333 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 1334 | table, string)); |
| 1335 | if (ret != NULL) |
| 1336 | { |
| 1337 | /* Set local fields. */ |
| 1338 | memset (&ret->esym, 0, sizeof (EXTR)); |
| 1339 | /* We use -2 as a marker to indicate that the information has |
| 1340 | not been set. -1 means there is no associated ifd. */ |
| 1341 | ret->esym.ifd = -2; |
| 1342 | ret->la25_stub = 0; |
| 1343 | ret->possibly_dynamic_relocs = 0; |
| 1344 | ret->fn_stub = NULL; |
| 1345 | ret->call_stub = NULL; |
| 1346 | ret->call_fp_stub = NULL; |
| 1347 | ret->mipsxhash_loc = 0; |
| 1348 | ret->global_got_area = GGA_NONE; |
| 1349 | ret->got_only_for_calls = TRUE; |
| 1350 | ret->readonly_reloc = FALSE; |
| 1351 | ret->has_static_relocs = FALSE; |
| 1352 | ret->no_fn_stub = FALSE; |
| 1353 | ret->need_fn_stub = FALSE; |
| 1354 | ret->has_nonpic_branches = FALSE; |
| 1355 | ret->needs_lazy_stub = FALSE; |
| 1356 | ret->use_plt_entry = FALSE; |
| 1357 | } |
| 1358 | |
| 1359 | return (struct bfd_hash_entry *) ret; |
| 1360 | } |
| 1361 | |
| 1362 | /* Allocate MIPS ELF private object data. */ |
| 1363 | |
| 1364 | bfd_boolean |
| 1365 | _bfd_mips_elf_mkobject (bfd *abfd) |
| 1366 | { |
| 1367 | return bfd_elf_allocate_object (abfd, sizeof (struct mips_elf_obj_tdata), |
| 1368 | MIPS_ELF_DATA); |
| 1369 | } |
| 1370 | |
| 1371 | bfd_boolean |
| 1372 | _bfd_mips_elf_new_section_hook (bfd *abfd, asection *sec) |
| 1373 | { |
| 1374 | if (!sec->used_by_bfd) |
| 1375 | { |
| 1376 | struct _mips_elf_section_data *sdata; |
| 1377 | size_t amt = sizeof (*sdata); |
| 1378 | |
| 1379 | sdata = bfd_zalloc (abfd, amt); |
| 1380 | if (sdata == NULL) |
| 1381 | return FALSE; |
| 1382 | sec->used_by_bfd = sdata; |
| 1383 | } |
| 1384 | |
| 1385 | return _bfd_elf_new_section_hook (abfd, sec); |
| 1386 | } |
| 1387 | \f |
| 1388 | /* Read ECOFF debugging information from a .mdebug section into a |
| 1389 | ecoff_debug_info structure. */ |
| 1390 | |
| 1391 | bfd_boolean |
| 1392 | _bfd_mips_elf_read_ecoff_info (bfd *abfd, asection *section, |
| 1393 | struct ecoff_debug_info *debug) |
| 1394 | { |
| 1395 | HDRR *symhdr; |
| 1396 | const struct ecoff_debug_swap *swap; |
| 1397 | char *ext_hdr; |
| 1398 | |
| 1399 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 1400 | memset (debug, 0, sizeof (*debug)); |
| 1401 | |
| 1402 | ext_hdr = bfd_malloc (swap->external_hdr_size); |
| 1403 | if (ext_hdr == NULL && swap->external_hdr_size != 0) |
| 1404 | goto error_return; |
| 1405 | |
| 1406 | if (! bfd_get_section_contents (abfd, section, ext_hdr, 0, |
| 1407 | swap->external_hdr_size)) |
| 1408 | goto error_return; |
| 1409 | |
| 1410 | symhdr = &debug->symbolic_header; |
| 1411 | (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); |
| 1412 | |
| 1413 | /* The symbolic header contains absolute file offsets and sizes to |
| 1414 | read. */ |
| 1415 | #define READ(ptr, offset, count, size, type) \ |
| 1416 | do \ |
| 1417 | { \ |
| 1418 | size_t amt; \ |
| 1419 | debug->ptr = NULL; \ |
| 1420 | if (symhdr->count == 0) \ |
| 1421 | break; \ |
| 1422 | if (_bfd_mul_overflow (size, symhdr->count, &amt)) \ |
| 1423 | { \ |
| 1424 | bfd_set_error (bfd_error_file_too_big); \ |
| 1425 | goto error_return; \ |
| 1426 | } \ |
| 1427 | if (bfd_seek (abfd, symhdr->offset, SEEK_SET) != 0) \ |
| 1428 | goto error_return; \ |
| 1429 | debug->ptr = (type) _bfd_malloc_and_read (abfd, amt, amt); \ |
| 1430 | if (debug->ptr == NULL) \ |
| 1431 | goto error_return; \ |
| 1432 | } while (0) |
| 1433 | |
| 1434 | READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); |
| 1435 | READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, void *); |
| 1436 | READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, void *); |
| 1437 | READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, void *); |
| 1438 | READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, void *); |
| 1439 | READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), |
| 1440 | union aux_ext *); |
| 1441 | READ (ss, cbSsOffset, issMax, sizeof (char), char *); |
| 1442 | READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); |
| 1443 | READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, void *); |
| 1444 | READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, void *); |
| 1445 | READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, void *); |
| 1446 | #undef READ |
| 1447 | |
| 1448 | debug->fdr = NULL; |
| 1449 | |
| 1450 | return TRUE; |
| 1451 | |
| 1452 | error_return: |
| 1453 | if (ext_hdr != NULL) |
| 1454 | free (ext_hdr); |
| 1455 | if (debug->line != NULL) |
| 1456 | free (debug->line); |
| 1457 | if (debug->external_dnr != NULL) |
| 1458 | free (debug->external_dnr); |
| 1459 | if (debug->external_pdr != NULL) |
| 1460 | free (debug->external_pdr); |
| 1461 | if (debug->external_sym != NULL) |
| 1462 | free (debug->external_sym); |
| 1463 | if (debug->external_opt != NULL) |
| 1464 | free (debug->external_opt); |
| 1465 | if (debug->external_aux != NULL) |
| 1466 | free (debug->external_aux); |
| 1467 | if (debug->ss != NULL) |
| 1468 | free (debug->ss); |
| 1469 | if (debug->ssext != NULL) |
| 1470 | free (debug->ssext); |
| 1471 | if (debug->external_fdr != NULL) |
| 1472 | free (debug->external_fdr); |
| 1473 | if (debug->external_rfd != NULL) |
| 1474 | free (debug->external_rfd); |
| 1475 | if (debug->external_ext != NULL) |
| 1476 | free (debug->external_ext); |
| 1477 | return FALSE; |
| 1478 | } |
| 1479 | \f |
| 1480 | /* Swap RPDR (runtime procedure table entry) for output. */ |
| 1481 | |
| 1482 | static void |
| 1483 | ecoff_swap_rpdr_out (bfd *abfd, const RPDR *in, struct rpdr_ext *ex) |
| 1484 | { |
| 1485 | H_PUT_S32 (abfd, in->adr, ex->p_adr); |
| 1486 | H_PUT_32 (abfd, in->regmask, ex->p_regmask); |
| 1487 | H_PUT_32 (abfd, in->regoffset, ex->p_regoffset); |
| 1488 | H_PUT_32 (abfd, in->fregmask, ex->p_fregmask); |
| 1489 | H_PUT_32 (abfd, in->fregoffset, ex->p_fregoffset); |
| 1490 | H_PUT_32 (abfd, in->frameoffset, ex->p_frameoffset); |
| 1491 | |
| 1492 | H_PUT_16 (abfd, in->framereg, ex->p_framereg); |
| 1493 | H_PUT_16 (abfd, in->pcreg, ex->p_pcreg); |
| 1494 | |
| 1495 | H_PUT_32 (abfd, in->irpss, ex->p_irpss); |
| 1496 | } |
| 1497 | |
| 1498 | /* Create a runtime procedure table from the .mdebug section. */ |
| 1499 | |
| 1500 | static bfd_boolean |
| 1501 | mips_elf_create_procedure_table (void *handle, bfd *abfd, |
| 1502 | struct bfd_link_info *info, asection *s, |
| 1503 | struct ecoff_debug_info *debug) |
| 1504 | { |
| 1505 | const struct ecoff_debug_swap *swap; |
| 1506 | HDRR *hdr = &debug->symbolic_header; |
| 1507 | RPDR *rpdr, *rp; |
| 1508 | struct rpdr_ext *erp; |
| 1509 | void *rtproc; |
| 1510 | struct pdr_ext *epdr; |
| 1511 | struct sym_ext *esym; |
| 1512 | char *ss, **sv; |
| 1513 | char *str; |
| 1514 | bfd_size_type size; |
| 1515 | bfd_size_type count; |
| 1516 | unsigned long sindex; |
| 1517 | unsigned long i; |
| 1518 | PDR pdr; |
| 1519 | SYMR sym; |
| 1520 | const char *no_name_func = _("static procedure (no name)"); |
| 1521 | |
| 1522 | epdr = NULL; |
| 1523 | rpdr = NULL; |
| 1524 | esym = NULL; |
| 1525 | ss = NULL; |
| 1526 | sv = NULL; |
| 1527 | |
| 1528 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 1529 | |
| 1530 | sindex = strlen (no_name_func) + 1; |
| 1531 | count = hdr->ipdMax; |
| 1532 | if (count > 0) |
| 1533 | { |
| 1534 | size = swap->external_pdr_size; |
| 1535 | |
| 1536 | epdr = bfd_malloc (size * count); |
| 1537 | if (epdr == NULL) |
| 1538 | goto error_return; |
| 1539 | |
| 1540 | if (! _bfd_ecoff_get_accumulated_pdr (handle, (bfd_byte *) epdr)) |
| 1541 | goto error_return; |
| 1542 | |
| 1543 | size = sizeof (RPDR); |
| 1544 | rp = rpdr = bfd_malloc (size * count); |
| 1545 | if (rpdr == NULL) |
| 1546 | goto error_return; |
| 1547 | |
| 1548 | size = sizeof (char *); |
| 1549 | sv = bfd_malloc (size * count); |
| 1550 | if (sv == NULL) |
| 1551 | goto error_return; |
| 1552 | |
| 1553 | count = hdr->isymMax; |
| 1554 | size = swap->external_sym_size; |
| 1555 | esym = bfd_malloc (size * count); |
| 1556 | if (esym == NULL) |
| 1557 | goto error_return; |
| 1558 | |
| 1559 | if (! _bfd_ecoff_get_accumulated_sym (handle, (bfd_byte *) esym)) |
| 1560 | goto error_return; |
| 1561 | |
| 1562 | count = hdr->issMax; |
| 1563 | ss = bfd_malloc (count); |
| 1564 | if (ss == NULL) |
| 1565 | goto error_return; |
| 1566 | if (! _bfd_ecoff_get_accumulated_ss (handle, (bfd_byte *) ss)) |
| 1567 | goto error_return; |
| 1568 | |
| 1569 | count = hdr->ipdMax; |
| 1570 | for (i = 0; i < (unsigned long) count; i++, rp++) |
| 1571 | { |
| 1572 | (*swap->swap_pdr_in) (abfd, epdr + i, &pdr); |
| 1573 | (*swap->swap_sym_in) (abfd, &esym[pdr.isym], &sym); |
| 1574 | rp->adr = sym.value; |
| 1575 | rp->regmask = pdr.regmask; |
| 1576 | rp->regoffset = pdr.regoffset; |
| 1577 | rp->fregmask = pdr.fregmask; |
| 1578 | rp->fregoffset = pdr.fregoffset; |
| 1579 | rp->frameoffset = pdr.frameoffset; |
| 1580 | rp->framereg = pdr.framereg; |
| 1581 | rp->pcreg = pdr.pcreg; |
| 1582 | rp->irpss = sindex; |
| 1583 | sv[i] = ss + sym.iss; |
| 1584 | sindex += strlen (sv[i]) + 1; |
| 1585 | } |
| 1586 | } |
| 1587 | |
| 1588 | size = sizeof (struct rpdr_ext) * (count + 2) + sindex; |
| 1589 | size = BFD_ALIGN (size, 16); |
| 1590 | rtproc = bfd_alloc (abfd, size); |
| 1591 | if (rtproc == NULL) |
| 1592 | { |
| 1593 | mips_elf_hash_table (info)->procedure_count = 0; |
| 1594 | goto error_return; |
| 1595 | } |
| 1596 | |
| 1597 | mips_elf_hash_table (info)->procedure_count = count + 2; |
| 1598 | |
| 1599 | erp = rtproc; |
| 1600 | memset (erp, 0, sizeof (struct rpdr_ext)); |
| 1601 | erp++; |
| 1602 | str = (char *) rtproc + sizeof (struct rpdr_ext) * (count + 2); |
| 1603 | strcpy (str, no_name_func); |
| 1604 | str += strlen (no_name_func) + 1; |
| 1605 | for (i = 0; i < count; i++) |
| 1606 | { |
| 1607 | ecoff_swap_rpdr_out (abfd, rpdr + i, erp + i); |
| 1608 | strcpy (str, sv[i]); |
| 1609 | str += strlen (sv[i]) + 1; |
| 1610 | } |
| 1611 | H_PUT_S32 (abfd, -1, (erp + count)->p_adr); |
| 1612 | |
| 1613 | /* Set the size and contents of .rtproc section. */ |
| 1614 | s->size = size; |
| 1615 | s->contents = rtproc; |
| 1616 | |
| 1617 | /* Skip this section later on (I don't think this currently |
| 1618 | matters, but someday it might). */ |
| 1619 | s->map_head.link_order = NULL; |
| 1620 | |
| 1621 | if (epdr != NULL) |
| 1622 | free (epdr); |
| 1623 | if (rpdr != NULL) |
| 1624 | free (rpdr); |
| 1625 | if (esym != NULL) |
| 1626 | free (esym); |
| 1627 | if (ss != NULL) |
| 1628 | free (ss); |
| 1629 | if (sv != NULL) |
| 1630 | free (sv); |
| 1631 | |
| 1632 | return TRUE; |
| 1633 | |
| 1634 | error_return: |
| 1635 | if (epdr != NULL) |
| 1636 | free (epdr); |
| 1637 | if (rpdr != NULL) |
| 1638 | free (rpdr); |
| 1639 | if (esym != NULL) |
| 1640 | free (esym); |
| 1641 | if (ss != NULL) |
| 1642 | free (ss); |
| 1643 | if (sv != NULL) |
| 1644 | free (sv); |
| 1645 | return FALSE; |
| 1646 | } |
| 1647 | \f |
| 1648 | /* We're going to create a stub for H. Create a symbol for the stub's |
| 1649 | value and size, to help make the disassembly easier to read. */ |
| 1650 | |
| 1651 | static bfd_boolean |
| 1652 | mips_elf_create_stub_symbol (struct bfd_link_info *info, |
| 1653 | struct mips_elf_link_hash_entry *h, |
| 1654 | const char *prefix, asection *s, bfd_vma value, |
| 1655 | bfd_vma size) |
| 1656 | { |
| 1657 | bfd_boolean micromips_p = ELF_ST_IS_MICROMIPS (h->root.other); |
| 1658 | struct bfd_link_hash_entry *bh; |
| 1659 | struct elf_link_hash_entry *elfh; |
| 1660 | char *name; |
| 1661 | bfd_boolean res; |
| 1662 | |
| 1663 | if (micromips_p) |
| 1664 | value |= 1; |
| 1665 | |
| 1666 | /* Create a new symbol. */ |
| 1667 | name = concat (prefix, h->root.root.root.string, NULL); |
| 1668 | bh = NULL; |
| 1669 | res = _bfd_generic_link_add_one_symbol (info, s->owner, name, |
| 1670 | BSF_LOCAL, s, value, NULL, |
| 1671 | TRUE, FALSE, &bh); |
| 1672 | free (name); |
| 1673 | if (! res) |
| 1674 | return FALSE; |
| 1675 | |
| 1676 | /* Make it a local function. */ |
| 1677 | elfh = (struct elf_link_hash_entry *) bh; |
| 1678 | elfh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| 1679 | elfh->size = size; |
| 1680 | elfh->forced_local = 1; |
| 1681 | if (micromips_p) |
| 1682 | elfh->other = ELF_ST_SET_MICROMIPS (elfh->other); |
| 1683 | return TRUE; |
| 1684 | } |
| 1685 | |
| 1686 | /* We're about to redefine H. Create a symbol to represent H's |
| 1687 | current value and size, to help make the disassembly easier |
| 1688 | to read. */ |
| 1689 | |
| 1690 | static bfd_boolean |
| 1691 | mips_elf_create_shadow_symbol (struct bfd_link_info *info, |
| 1692 | struct mips_elf_link_hash_entry *h, |
| 1693 | const char *prefix) |
| 1694 | { |
| 1695 | struct bfd_link_hash_entry *bh; |
| 1696 | struct elf_link_hash_entry *elfh; |
| 1697 | char *name; |
| 1698 | asection *s; |
| 1699 | bfd_vma value; |
| 1700 | bfd_boolean res; |
| 1701 | |
| 1702 | /* Read the symbol's value. */ |
| 1703 | BFD_ASSERT (h->root.root.type == bfd_link_hash_defined |
| 1704 | || h->root.root.type == bfd_link_hash_defweak); |
| 1705 | s = h->root.root.u.def.section; |
| 1706 | value = h->root.root.u.def.value; |
| 1707 | |
| 1708 | /* Create a new symbol. */ |
| 1709 | name = concat (prefix, h->root.root.root.string, NULL); |
| 1710 | bh = NULL; |
| 1711 | res = _bfd_generic_link_add_one_symbol (info, s->owner, name, |
| 1712 | BSF_LOCAL, s, value, NULL, |
| 1713 | TRUE, FALSE, &bh); |
| 1714 | free (name); |
| 1715 | if (! res) |
| 1716 | return FALSE; |
| 1717 | |
| 1718 | /* Make it local and copy the other attributes from H. */ |
| 1719 | elfh = (struct elf_link_hash_entry *) bh; |
| 1720 | elfh->type = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (h->root.type)); |
| 1721 | elfh->other = h->root.other; |
| 1722 | elfh->size = h->root.size; |
| 1723 | elfh->forced_local = 1; |
| 1724 | return TRUE; |
| 1725 | } |
| 1726 | |
| 1727 | /* Return TRUE if relocations in SECTION can refer directly to a MIPS16 |
| 1728 | function rather than to a hard-float stub. */ |
| 1729 | |
| 1730 | static bfd_boolean |
| 1731 | section_allows_mips16_refs_p (asection *section) |
| 1732 | { |
| 1733 | const char *name; |
| 1734 | |
| 1735 | name = bfd_section_name (section); |
| 1736 | return (FN_STUB_P (name) |
| 1737 | || CALL_STUB_P (name) |
| 1738 | || CALL_FP_STUB_P (name) |
| 1739 | || strcmp (name, ".pdr") == 0); |
| 1740 | } |
| 1741 | |
| 1742 | /* [RELOCS, RELEND) are the relocations against SEC, which is a MIPS16 |
| 1743 | stub section of some kind. Return the R_SYMNDX of the target |
| 1744 | function, or 0 if we can't decide which function that is. */ |
| 1745 | |
| 1746 | static unsigned long |
| 1747 | mips16_stub_symndx (const struct elf_backend_data *bed, |
| 1748 | asection *sec ATTRIBUTE_UNUSED, |
| 1749 | const Elf_Internal_Rela *relocs, |
| 1750 | const Elf_Internal_Rela *relend) |
| 1751 | { |
| 1752 | int int_rels_per_ext_rel = bed->s->int_rels_per_ext_rel; |
| 1753 | const Elf_Internal_Rela *rel; |
| 1754 | |
| 1755 | /* Trust the first R_MIPS_NONE relocation, if any, but not a subsequent |
| 1756 | one in a compound relocation. */ |
| 1757 | for (rel = relocs; rel < relend; rel += int_rels_per_ext_rel) |
| 1758 | if (ELF_R_TYPE (sec->owner, rel->r_info) == R_MIPS_NONE) |
| 1759 | return ELF_R_SYM (sec->owner, rel->r_info); |
| 1760 | |
| 1761 | /* Otherwise trust the first relocation, whatever its kind. This is |
| 1762 | the traditional behavior. */ |
| 1763 | if (relocs < relend) |
| 1764 | return ELF_R_SYM (sec->owner, relocs->r_info); |
| 1765 | |
| 1766 | return 0; |
| 1767 | } |
| 1768 | |
| 1769 | /* Check the mips16 stubs for a particular symbol, and see if we can |
| 1770 | discard them. */ |
| 1771 | |
| 1772 | static void |
| 1773 | mips_elf_check_mips16_stubs (struct bfd_link_info *info, |
| 1774 | struct mips_elf_link_hash_entry *h) |
| 1775 | { |
| 1776 | /* Dynamic symbols must use the standard call interface, in case other |
| 1777 | objects try to call them. */ |
| 1778 | if (h->fn_stub != NULL |
| 1779 | && h->root.dynindx != -1) |
| 1780 | { |
| 1781 | mips_elf_create_shadow_symbol (info, h, ".mips16."); |
| 1782 | h->need_fn_stub = TRUE; |
| 1783 | } |
| 1784 | |
| 1785 | if (h->fn_stub != NULL |
| 1786 | && ! h->need_fn_stub) |
| 1787 | { |
| 1788 | /* We don't need the fn_stub; the only references to this symbol |
| 1789 | are 16 bit calls. Clobber the size to 0 to prevent it from |
| 1790 | being included in the link. */ |
| 1791 | h->fn_stub->size = 0; |
| 1792 | h->fn_stub->flags &= ~SEC_RELOC; |
| 1793 | h->fn_stub->reloc_count = 0; |
| 1794 | h->fn_stub->flags |= SEC_EXCLUDE; |
| 1795 | h->fn_stub->output_section = bfd_abs_section_ptr; |
| 1796 | } |
| 1797 | |
| 1798 | if (h->call_stub != NULL |
| 1799 | && ELF_ST_IS_MIPS16 (h->root.other)) |
| 1800 | { |
| 1801 | /* We don't need the call_stub; this is a 16 bit function, so |
| 1802 | calls from other 16 bit functions are OK. Clobber the size |
| 1803 | to 0 to prevent it from being included in the link. */ |
| 1804 | h->call_stub->size = 0; |
| 1805 | h->call_stub->flags &= ~SEC_RELOC; |
| 1806 | h->call_stub->reloc_count = 0; |
| 1807 | h->call_stub->flags |= SEC_EXCLUDE; |
| 1808 | h->call_stub->output_section = bfd_abs_section_ptr; |
| 1809 | } |
| 1810 | |
| 1811 | if (h->call_fp_stub != NULL |
| 1812 | && ELF_ST_IS_MIPS16 (h->root.other)) |
| 1813 | { |
| 1814 | /* We don't need the call_stub; this is a 16 bit function, so |
| 1815 | calls from other 16 bit functions are OK. Clobber the size |
| 1816 | to 0 to prevent it from being included in the link. */ |
| 1817 | h->call_fp_stub->size = 0; |
| 1818 | h->call_fp_stub->flags &= ~SEC_RELOC; |
| 1819 | h->call_fp_stub->reloc_count = 0; |
| 1820 | h->call_fp_stub->flags |= SEC_EXCLUDE; |
| 1821 | h->call_fp_stub->output_section = bfd_abs_section_ptr; |
| 1822 | } |
| 1823 | } |
| 1824 | |
| 1825 | /* Hashtable callbacks for mips_elf_la25_stubs. */ |
| 1826 | |
| 1827 | static hashval_t |
| 1828 | mips_elf_la25_stub_hash (const void *entry_) |
| 1829 | { |
| 1830 | const struct mips_elf_la25_stub *entry; |
| 1831 | |
| 1832 | entry = (struct mips_elf_la25_stub *) entry_; |
| 1833 | return entry->h->root.root.u.def.section->id |
| 1834 | + entry->h->root.root.u.def.value; |
| 1835 | } |
| 1836 | |
| 1837 | static int |
| 1838 | mips_elf_la25_stub_eq (const void *entry1_, const void *entry2_) |
| 1839 | { |
| 1840 | const struct mips_elf_la25_stub *entry1, *entry2; |
| 1841 | |
| 1842 | entry1 = (struct mips_elf_la25_stub *) entry1_; |
| 1843 | entry2 = (struct mips_elf_la25_stub *) entry2_; |
| 1844 | return ((entry1->h->root.root.u.def.section |
| 1845 | == entry2->h->root.root.u.def.section) |
| 1846 | && (entry1->h->root.root.u.def.value |
| 1847 | == entry2->h->root.root.u.def.value)); |
| 1848 | } |
| 1849 | |
| 1850 | /* Called by the linker to set up the la25 stub-creation code. FN is |
| 1851 | the linker's implementation of add_stub_function. Return true on |
| 1852 | success. */ |
| 1853 | |
| 1854 | bfd_boolean |
| 1855 | _bfd_mips_elf_init_stubs (struct bfd_link_info *info, |
| 1856 | asection *(*fn) (const char *, asection *, |
| 1857 | asection *)) |
| 1858 | { |
| 1859 | struct mips_elf_link_hash_table *htab; |
| 1860 | |
| 1861 | htab = mips_elf_hash_table (info); |
| 1862 | if (htab == NULL) |
| 1863 | return FALSE; |
| 1864 | |
| 1865 | htab->add_stub_section = fn; |
| 1866 | htab->la25_stubs = htab_try_create (1, mips_elf_la25_stub_hash, |
| 1867 | mips_elf_la25_stub_eq, NULL); |
| 1868 | if (htab->la25_stubs == NULL) |
| 1869 | return FALSE; |
| 1870 | |
| 1871 | return TRUE; |
| 1872 | } |
| 1873 | |
| 1874 | /* Return true if H is a locally-defined PIC function, in the sense |
| 1875 | that it or its fn_stub might need $25 to be valid on entry. |
| 1876 | Note that MIPS16 functions set up $gp using PC-relative instructions, |
| 1877 | so they themselves never need $25 to be valid. Only non-MIPS16 |
| 1878 | entry points are of interest here. */ |
| 1879 | |
| 1880 | static bfd_boolean |
| 1881 | mips_elf_local_pic_function_p (struct mips_elf_link_hash_entry *h) |
| 1882 | { |
| 1883 | return ((h->root.root.type == bfd_link_hash_defined |
| 1884 | || h->root.root.type == bfd_link_hash_defweak) |
| 1885 | && h->root.def_regular |
| 1886 | && !bfd_is_abs_section (h->root.root.u.def.section) |
| 1887 | && !bfd_is_und_section (h->root.root.u.def.section) |
| 1888 | && (!ELF_ST_IS_MIPS16 (h->root.other) |
| 1889 | || (h->fn_stub && h->need_fn_stub)) |
| 1890 | && (PIC_OBJECT_P (h->root.root.u.def.section->owner) |
| 1891 | || ELF_ST_IS_MIPS_PIC (h->root.other))); |
| 1892 | } |
| 1893 | |
| 1894 | /* Set *SEC to the input section that contains the target of STUB. |
| 1895 | Return the offset of the target from the start of that section. */ |
| 1896 | |
| 1897 | static bfd_vma |
| 1898 | mips_elf_get_la25_target (struct mips_elf_la25_stub *stub, |
| 1899 | asection **sec) |
| 1900 | { |
| 1901 | if (ELF_ST_IS_MIPS16 (stub->h->root.other)) |
| 1902 | { |
| 1903 | BFD_ASSERT (stub->h->need_fn_stub); |
| 1904 | *sec = stub->h->fn_stub; |
| 1905 | return 0; |
| 1906 | } |
| 1907 | else |
| 1908 | { |
| 1909 | *sec = stub->h->root.root.u.def.section; |
| 1910 | return stub->h->root.root.u.def.value; |
| 1911 | } |
| 1912 | } |
| 1913 | |
| 1914 | /* STUB describes an la25 stub that we have decided to implement |
| 1915 | by inserting an LUI/ADDIU pair before the target function. |
| 1916 | Create the section and redirect the function symbol to it. */ |
| 1917 | |
| 1918 | static bfd_boolean |
| 1919 | mips_elf_add_la25_intro (struct mips_elf_la25_stub *stub, |
| 1920 | struct bfd_link_info *info) |
| 1921 | { |
| 1922 | struct mips_elf_link_hash_table *htab; |
| 1923 | char *name; |
| 1924 | asection *s, *input_section; |
| 1925 | unsigned int align; |
| 1926 | |
| 1927 | htab = mips_elf_hash_table (info); |
| 1928 | if (htab == NULL) |
| 1929 | return FALSE; |
| 1930 | |
| 1931 | /* Create a unique name for the new section. */ |
| 1932 | name = bfd_malloc (11 + sizeof (".text.stub.")); |
| 1933 | if (name == NULL) |
| 1934 | return FALSE; |
| 1935 | sprintf (name, ".text.stub.%d", (int) htab_elements (htab->la25_stubs)); |
| 1936 | |
| 1937 | /* Create the section. */ |
| 1938 | mips_elf_get_la25_target (stub, &input_section); |
| 1939 | s = htab->add_stub_section (name, input_section, |
| 1940 | input_section->output_section); |
| 1941 | if (s == NULL) |
| 1942 | return FALSE; |
| 1943 | |
| 1944 | /* Make sure that any padding goes before the stub. */ |
| 1945 | align = input_section->alignment_power; |
| 1946 | if (!bfd_set_section_alignment (s, align)) |
| 1947 | return FALSE; |
| 1948 | if (align > 3) |
| 1949 | s->size = (1 << align) - 8; |
| 1950 | |
| 1951 | /* Create a symbol for the stub. */ |
| 1952 | mips_elf_create_stub_symbol (info, stub->h, ".pic.", s, s->size, 8); |
| 1953 | stub->stub_section = s; |
| 1954 | stub->offset = s->size; |
| 1955 | |
| 1956 | /* Allocate room for it. */ |
| 1957 | s->size += 8; |
| 1958 | return TRUE; |
| 1959 | } |
| 1960 | |
| 1961 | /* STUB describes an la25 stub that we have decided to implement |
| 1962 | with a separate trampoline. Allocate room for it and redirect |
| 1963 | the function symbol to it. */ |
| 1964 | |
| 1965 | static bfd_boolean |
| 1966 | mips_elf_add_la25_trampoline (struct mips_elf_la25_stub *stub, |
| 1967 | struct bfd_link_info *info) |
| 1968 | { |
| 1969 | struct mips_elf_link_hash_table *htab; |
| 1970 | asection *s; |
| 1971 | |
| 1972 | htab = mips_elf_hash_table (info); |
| 1973 | if (htab == NULL) |
| 1974 | return FALSE; |
| 1975 | |
| 1976 | /* Create a trampoline section, if we haven't already. */ |
| 1977 | s = htab->strampoline; |
| 1978 | if (s == NULL) |
| 1979 | { |
| 1980 | asection *input_section = stub->h->root.root.u.def.section; |
| 1981 | s = htab->add_stub_section (".text", NULL, |
| 1982 | input_section->output_section); |
| 1983 | if (s == NULL || !bfd_set_section_alignment (s, 4)) |
| 1984 | return FALSE; |
| 1985 | htab->strampoline = s; |
| 1986 | } |
| 1987 | |
| 1988 | /* Create a symbol for the stub. */ |
| 1989 | mips_elf_create_stub_symbol (info, stub->h, ".pic.", s, s->size, 16); |
| 1990 | stub->stub_section = s; |
| 1991 | stub->offset = s->size; |
| 1992 | |
| 1993 | /* Allocate room for it. */ |
| 1994 | s->size += 16; |
| 1995 | return TRUE; |
| 1996 | } |
| 1997 | |
| 1998 | /* H describes a symbol that needs an la25 stub. Make sure that an |
| 1999 | appropriate stub exists and point H at it. */ |
| 2000 | |
| 2001 | static bfd_boolean |
| 2002 | mips_elf_add_la25_stub (struct bfd_link_info *info, |
| 2003 | struct mips_elf_link_hash_entry *h) |
| 2004 | { |
| 2005 | struct mips_elf_link_hash_table *htab; |
| 2006 | struct mips_elf_la25_stub search, *stub; |
| 2007 | bfd_boolean use_trampoline_p; |
| 2008 | asection *s; |
| 2009 | bfd_vma value; |
| 2010 | void **slot; |
| 2011 | |
| 2012 | /* Describe the stub we want. */ |
| 2013 | search.stub_section = NULL; |
| 2014 | search.offset = 0; |
| 2015 | search.h = h; |
| 2016 | |
| 2017 | /* See if we've already created an equivalent stub. */ |
| 2018 | htab = mips_elf_hash_table (info); |
| 2019 | if (htab == NULL) |
| 2020 | return FALSE; |
| 2021 | |
| 2022 | slot = htab_find_slot (htab->la25_stubs, &search, INSERT); |
| 2023 | if (slot == NULL) |
| 2024 | return FALSE; |
| 2025 | |
| 2026 | stub = (struct mips_elf_la25_stub *) *slot; |
| 2027 | if (stub != NULL) |
| 2028 | { |
| 2029 | /* We can reuse the existing stub. */ |
| 2030 | h->la25_stub = stub; |
| 2031 | return TRUE; |
| 2032 | } |
| 2033 | |
| 2034 | /* Create a permanent copy of ENTRY and add it to the hash table. */ |
| 2035 | stub = bfd_malloc (sizeof (search)); |
| 2036 | if (stub == NULL) |
| 2037 | return FALSE; |
| 2038 | *stub = search; |
| 2039 | *slot = stub; |
| 2040 | |
| 2041 | /* Prefer to use LUI/ADDIU stubs if the function is at the beginning |
| 2042 | of the section and if we would need no more than 2 nops. */ |
| 2043 | value = mips_elf_get_la25_target (stub, &s); |
| 2044 | if (ELF_ST_IS_MICROMIPS (stub->h->root.other)) |
| 2045 | value &= ~1; |
| 2046 | use_trampoline_p = (value != 0 || s->alignment_power > 4); |
| 2047 | |
| 2048 | h->la25_stub = stub; |
| 2049 | return (use_trampoline_p |
| 2050 | ? mips_elf_add_la25_trampoline (stub, info) |
| 2051 | : mips_elf_add_la25_intro (stub, info)); |
| 2052 | } |
| 2053 | |
| 2054 | /* A mips_elf_link_hash_traverse callback that is called before sizing |
| 2055 | sections. DATA points to a mips_htab_traverse_info structure. */ |
| 2056 | |
| 2057 | static bfd_boolean |
| 2058 | mips_elf_check_symbols (struct mips_elf_link_hash_entry *h, void *data) |
| 2059 | { |
| 2060 | struct mips_htab_traverse_info *hti; |
| 2061 | |
| 2062 | hti = (struct mips_htab_traverse_info *) data; |
| 2063 | if (!bfd_link_relocatable (hti->info)) |
| 2064 | mips_elf_check_mips16_stubs (hti->info, h); |
| 2065 | |
| 2066 | if (mips_elf_local_pic_function_p (h)) |
| 2067 | { |
| 2068 | /* PR 12845: If H is in a section that has been garbage |
| 2069 | collected it will have its output section set to *ABS*. */ |
| 2070 | if (bfd_is_abs_section (h->root.root.u.def.section->output_section)) |
| 2071 | return TRUE; |
| 2072 | |
| 2073 | /* H is a function that might need $25 to be valid on entry. |
| 2074 | If we're creating a non-PIC relocatable object, mark H as |
| 2075 | being PIC. If we're creating a non-relocatable object with |
| 2076 | non-PIC branches and jumps to H, make sure that H has an la25 |
| 2077 | stub. */ |
| 2078 | if (bfd_link_relocatable (hti->info)) |
| 2079 | { |
| 2080 | if (!PIC_OBJECT_P (hti->output_bfd)) |
| 2081 | h->root.other = ELF_ST_SET_MIPS_PIC (h->root.other); |
| 2082 | } |
| 2083 | else if (h->has_nonpic_branches && !mips_elf_add_la25_stub (hti->info, h)) |
| 2084 | { |
| 2085 | hti->error = TRUE; |
| 2086 | return FALSE; |
| 2087 | } |
| 2088 | } |
| 2089 | return TRUE; |
| 2090 | } |
| 2091 | \f |
| 2092 | /* R_MIPS16_26 is used for the mips16 jal and jalx instructions. |
| 2093 | Most mips16 instructions are 16 bits, but these instructions |
| 2094 | are 32 bits. |
| 2095 | |
| 2096 | The format of these instructions is: |
| 2097 | |
| 2098 | +--------------+--------------------------------+ |
| 2099 | | JALX | X| Imm 20:16 | Imm 25:21 | |
| 2100 | +--------------+--------------------------------+ |
| 2101 | | Immediate 15:0 | |
| 2102 | +-----------------------------------------------+ |
| 2103 | |
| 2104 | JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx. |
| 2105 | Note that the immediate value in the first word is swapped. |
| 2106 | |
| 2107 | When producing a relocatable object file, R_MIPS16_26 is |
| 2108 | handled mostly like R_MIPS_26. In particular, the addend is |
| 2109 | stored as a straight 26-bit value in a 32-bit instruction. |
| 2110 | (gas makes life simpler for itself by never adjusting a |
| 2111 | R_MIPS16_26 reloc to be against a section, so the addend is |
| 2112 | always zero). However, the 32 bit instruction is stored as 2 |
| 2113 | 16-bit values, rather than a single 32-bit value. In a |
| 2114 | big-endian file, the result is the same; in a little-endian |
| 2115 | file, the two 16-bit halves of the 32 bit value are swapped. |
| 2116 | This is so that a disassembler can recognize the jal |
| 2117 | instruction. |
| 2118 | |
| 2119 | When doing a final link, R_MIPS16_26 is treated as a 32 bit |
| 2120 | instruction stored as two 16-bit values. The addend A is the |
| 2121 | contents of the targ26 field. The calculation is the same as |
| 2122 | R_MIPS_26. When storing the calculated value, reorder the |
| 2123 | immediate value as shown above, and don't forget to store the |
| 2124 | value as two 16-bit values. |
| 2125 | |
| 2126 | To put it in MIPS ABI terms, the relocation field is T-targ26-16, |
| 2127 | defined as |
| 2128 | |
| 2129 | big-endian: |
| 2130 | +--------+----------------------+ |
| 2131 | | | | |
| 2132 | | | targ26-16 | |
| 2133 | |31 26|25 0| |
| 2134 | +--------+----------------------+ |
| 2135 | |
| 2136 | little-endian: |
| 2137 | +----------+------+-------------+ |
| 2138 | | | | | |
| 2139 | | sub1 | | sub2 | |
| 2140 | |0 9|10 15|16 31| |
| 2141 | +----------+--------------------+ |
| 2142 | where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is |
| 2143 | ((sub1 << 16) | sub2)). |
| 2144 | |
| 2145 | When producing a relocatable object file, the calculation is |
| 2146 | (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2) |
| 2147 | When producing a fully linked file, the calculation is |
| 2148 | let R = (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2) |
| 2149 | ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff) |
| 2150 | |
| 2151 | The table below lists the other MIPS16 instruction relocations. |
| 2152 | Each one is calculated in the same way as the non-MIPS16 relocation |
| 2153 | given on the right, but using the extended MIPS16 layout of 16-bit |
| 2154 | immediate fields: |
| 2155 | |
| 2156 | R_MIPS16_GPREL R_MIPS_GPREL16 |
| 2157 | R_MIPS16_GOT16 R_MIPS_GOT16 |
| 2158 | R_MIPS16_CALL16 R_MIPS_CALL16 |
| 2159 | R_MIPS16_HI16 R_MIPS_HI16 |
| 2160 | R_MIPS16_LO16 R_MIPS_LO16 |
| 2161 | |
| 2162 | A typical instruction will have a format like this: |
| 2163 | |
| 2164 | +--------------+--------------------------------+ |
| 2165 | | EXTEND | Imm 10:5 | Imm 15:11 | |
| 2166 | +--------------+--------------------------------+ |
| 2167 | | Major | rx | ry | Imm 4:0 | |
| 2168 | +--------------+--------------------------------+ |
| 2169 | |
| 2170 | EXTEND is the five bit value 11110. Major is the instruction |
| 2171 | opcode. |
| 2172 | |
| 2173 | All we need to do here is shuffle the bits appropriately. |
| 2174 | As above, the two 16-bit halves must be swapped on a |
| 2175 | little-endian system. |
| 2176 | |
| 2177 | Finally R_MIPS16_PC16_S1 corresponds to R_MIPS_PC16, however the |
| 2178 | relocatable field is shifted by 1 rather than 2 and the same bit |
| 2179 | shuffling is done as with the relocations above. */ |
| 2180 | |
| 2181 | static inline bfd_boolean |
| 2182 | mips16_reloc_p (int r_type) |
| 2183 | { |
| 2184 | switch (r_type) |
| 2185 | { |
| 2186 | case R_MIPS16_26: |
| 2187 | case R_MIPS16_GPREL: |
| 2188 | case R_MIPS16_GOT16: |
| 2189 | case R_MIPS16_CALL16: |
| 2190 | case R_MIPS16_HI16: |
| 2191 | case R_MIPS16_LO16: |
| 2192 | case R_MIPS16_TLS_GD: |
| 2193 | case R_MIPS16_TLS_LDM: |
| 2194 | case R_MIPS16_TLS_DTPREL_HI16: |
| 2195 | case R_MIPS16_TLS_DTPREL_LO16: |
| 2196 | case R_MIPS16_TLS_GOTTPREL: |
| 2197 | case R_MIPS16_TLS_TPREL_HI16: |
| 2198 | case R_MIPS16_TLS_TPREL_LO16: |
| 2199 | case R_MIPS16_PC16_S1: |
| 2200 | return TRUE; |
| 2201 | |
| 2202 | default: |
| 2203 | return FALSE; |
| 2204 | } |
| 2205 | } |
| 2206 | |
| 2207 | /* Check if a microMIPS reloc. */ |
| 2208 | |
| 2209 | static inline bfd_boolean |
| 2210 | micromips_reloc_p (unsigned int r_type) |
| 2211 | { |
| 2212 | return r_type >= R_MICROMIPS_min && r_type < R_MICROMIPS_max; |
| 2213 | } |
| 2214 | |
| 2215 | /* Similar to MIPS16, the two 16-bit halves in microMIPS must be swapped |
| 2216 | on a little-endian system. This does not apply to R_MICROMIPS_PC7_S1 |
| 2217 | and R_MICROMIPS_PC10_S1 relocs that apply to 16-bit instructions. */ |
| 2218 | |
| 2219 | static inline bfd_boolean |
| 2220 | micromips_reloc_shuffle_p (unsigned int r_type) |
| 2221 | { |
| 2222 | return (micromips_reloc_p (r_type) |
| 2223 | && r_type != R_MICROMIPS_PC7_S1 |
| 2224 | && r_type != R_MICROMIPS_PC10_S1); |
| 2225 | } |
| 2226 | |
| 2227 | static inline bfd_boolean |
| 2228 | got16_reloc_p (int r_type) |
| 2229 | { |
| 2230 | return (r_type == R_MIPS_GOT16 |
| 2231 | || r_type == R_MIPS16_GOT16 |
| 2232 | || r_type == R_MICROMIPS_GOT16); |
| 2233 | } |
| 2234 | |
| 2235 | static inline bfd_boolean |
| 2236 | call16_reloc_p (int r_type) |
| 2237 | { |
| 2238 | return (r_type == R_MIPS_CALL16 |
| 2239 | || r_type == R_MIPS16_CALL16 |
| 2240 | || r_type == R_MICROMIPS_CALL16); |
| 2241 | } |
| 2242 | |
| 2243 | static inline bfd_boolean |
| 2244 | got_disp_reloc_p (unsigned int r_type) |
| 2245 | { |
| 2246 | return r_type == R_MIPS_GOT_DISP || r_type == R_MICROMIPS_GOT_DISP; |
| 2247 | } |
| 2248 | |
| 2249 | static inline bfd_boolean |
| 2250 | got_page_reloc_p (unsigned int r_type) |
| 2251 | { |
| 2252 | return r_type == R_MIPS_GOT_PAGE || r_type == R_MICROMIPS_GOT_PAGE; |
| 2253 | } |
| 2254 | |
| 2255 | static inline bfd_boolean |
| 2256 | got_lo16_reloc_p (unsigned int r_type) |
| 2257 | { |
| 2258 | return r_type == R_MIPS_GOT_LO16 || r_type == R_MICROMIPS_GOT_LO16; |
| 2259 | } |
| 2260 | |
| 2261 | static inline bfd_boolean |
| 2262 | call_hi16_reloc_p (unsigned int r_type) |
| 2263 | { |
| 2264 | return r_type == R_MIPS_CALL_HI16 || r_type == R_MICROMIPS_CALL_HI16; |
| 2265 | } |
| 2266 | |
| 2267 | static inline bfd_boolean |
| 2268 | call_lo16_reloc_p (unsigned int r_type) |
| 2269 | { |
| 2270 | return r_type == R_MIPS_CALL_LO16 || r_type == R_MICROMIPS_CALL_LO16; |
| 2271 | } |
| 2272 | |
| 2273 | static inline bfd_boolean |
| 2274 | hi16_reloc_p (int r_type) |
| 2275 | { |
| 2276 | return (r_type == R_MIPS_HI16 |
| 2277 | || r_type == R_MIPS16_HI16 |
| 2278 | || r_type == R_MICROMIPS_HI16 |
| 2279 | || r_type == R_MIPS_PCHI16); |
| 2280 | } |
| 2281 | |
| 2282 | static inline bfd_boolean |
| 2283 | lo16_reloc_p (int r_type) |
| 2284 | { |
| 2285 | return (r_type == R_MIPS_LO16 |
| 2286 | || r_type == R_MIPS16_LO16 |
| 2287 | || r_type == R_MICROMIPS_LO16 |
| 2288 | || r_type == R_MIPS_PCLO16); |
| 2289 | } |
| 2290 | |
| 2291 | static inline bfd_boolean |
| 2292 | mips16_call_reloc_p (int r_type) |
| 2293 | { |
| 2294 | return r_type == R_MIPS16_26 || r_type == R_MIPS16_CALL16; |
| 2295 | } |
| 2296 | |
| 2297 | static inline bfd_boolean |
| 2298 | jal_reloc_p (int r_type) |
| 2299 | { |
| 2300 | return (r_type == R_MIPS_26 |
| 2301 | || r_type == R_MIPS16_26 |
| 2302 | || r_type == R_MICROMIPS_26_S1); |
| 2303 | } |
| 2304 | |
| 2305 | static inline bfd_boolean |
| 2306 | b_reloc_p (int r_type) |
| 2307 | { |
| 2308 | return (r_type == R_MIPS_PC26_S2 |
| 2309 | || r_type == R_MIPS_PC21_S2 |
| 2310 | || r_type == R_MIPS_PC16 |
| 2311 | || r_type == R_MIPS_GNU_REL16_S2 |
| 2312 | || r_type == R_MIPS16_PC16_S1 |
| 2313 | || r_type == R_MICROMIPS_PC16_S1 |
| 2314 | || r_type == R_MICROMIPS_PC10_S1 |
| 2315 | || r_type == R_MICROMIPS_PC7_S1); |
| 2316 | } |
| 2317 | |
| 2318 | static inline bfd_boolean |
| 2319 | aligned_pcrel_reloc_p (int r_type) |
| 2320 | { |
| 2321 | return (r_type == R_MIPS_PC18_S3 |
| 2322 | || r_type == R_MIPS_PC19_S2); |
| 2323 | } |
| 2324 | |
| 2325 | static inline bfd_boolean |
| 2326 | branch_reloc_p (int r_type) |
| 2327 | { |
| 2328 | return (r_type == R_MIPS_26 |
| 2329 | || r_type == R_MIPS_PC26_S2 |
| 2330 | || r_type == R_MIPS_PC21_S2 |
| 2331 | || r_type == R_MIPS_PC16 |
| 2332 | || r_type == R_MIPS_GNU_REL16_S2); |
| 2333 | } |
| 2334 | |
| 2335 | static inline bfd_boolean |
| 2336 | mips16_branch_reloc_p (int r_type) |
| 2337 | { |
| 2338 | return (r_type == R_MIPS16_26 |
| 2339 | || r_type == R_MIPS16_PC16_S1); |
| 2340 | } |
| 2341 | |
| 2342 | static inline bfd_boolean |
| 2343 | micromips_branch_reloc_p (int r_type) |
| 2344 | { |
| 2345 | return (r_type == R_MICROMIPS_26_S1 |
| 2346 | || r_type == R_MICROMIPS_PC16_S1 |
| 2347 | || r_type == R_MICROMIPS_PC10_S1 |
| 2348 | || r_type == R_MICROMIPS_PC7_S1); |
| 2349 | } |
| 2350 | |
| 2351 | static inline bfd_boolean |
| 2352 | tls_gd_reloc_p (unsigned int r_type) |
| 2353 | { |
| 2354 | return (r_type == R_MIPS_TLS_GD |
| 2355 | || r_type == R_MIPS16_TLS_GD |
| 2356 | || r_type == R_MICROMIPS_TLS_GD); |
| 2357 | } |
| 2358 | |
| 2359 | static inline bfd_boolean |
| 2360 | tls_ldm_reloc_p (unsigned int r_type) |
| 2361 | { |
| 2362 | return (r_type == R_MIPS_TLS_LDM |
| 2363 | || r_type == R_MIPS16_TLS_LDM |
| 2364 | || r_type == R_MICROMIPS_TLS_LDM); |
| 2365 | } |
| 2366 | |
| 2367 | static inline bfd_boolean |
| 2368 | tls_gottprel_reloc_p (unsigned int r_type) |
| 2369 | { |
| 2370 | return (r_type == R_MIPS_TLS_GOTTPREL |
| 2371 | || r_type == R_MIPS16_TLS_GOTTPREL |
| 2372 | || r_type == R_MICROMIPS_TLS_GOTTPREL); |
| 2373 | } |
| 2374 | |
| 2375 | void |
| 2376 | _bfd_mips_elf_reloc_unshuffle (bfd *abfd, int r_type, |
| 2377 | bfd_boolean jal_shuffle, bfd_byte *data) |
| 2378 | { |
| 2379 | bfd_vma first, second, val; |
| 2380 | |
| 2381 | if (!mips16_reloc_p (r_type) && !micromips_reloc_shuffle_p (r_type)) |
| 2382 | return; |
| 2383 | |
| 2384 | /* Pick up the first and second halfwords of the instruction. */ |
| 2385 | first = bfd_get_16 (abfd, data); |
| 2386 | second = bfd_get_16 (abfd, data + 2); |
| 2387 | if (micromips_reloc_p (r_type) || (r_type == R_MIPS16_26 && !jal_shuffle)) |
| 2388 | val = first << 16 | second; |
| 2389 | else if (r_type != R_MIPS16_26) |
| 2390 | val = (((first & 0xf800) << 16) | ((second & 0xffe0) << 11) |
| 2391 | | ((first & 0x1f) << 11) | (first & 0x7e0) | (second & 0x1f)); |
| 2392 | else |
| 2393 | val = (((first & 0xfc00) << 16) | ((first & 0x3e0) << 11) |
| 2394 | | ((first & 0x1f) << 21) | second); |
| 2395 | bfd_put_32 (abfd, val, data); |
| 2396 | } |
| 2397 | |
| 2398 | void |
| 2399 | _bfd_mips_elf_reloc_shuffle (bfd *abfd, int r_type, |
| 2400 | bfd_boolean jal_shuffle, bfd_byte *data) |
| 2401 | { |
| 2402 | bfd_vma first, second, val; |
| 2403 | |
| 2404 | if (!mips16_reloc_p (r_type) && !micromips_reloc_shuffle_p (r_type)) |
| 2405 | return; |
| 2406 | |
| 2407 | val = bfd_get_32 (abfd, data); |
| 2408 | if (micromips_reloc_p (r_type) || (r_type == R_MIPS16_26 && !jal_shuffle)) |
| 2409 | { |
| 2410 | second = val & 0xffff; |
| 2411 | first = val >> 16; |
| 2412 | } |
| 2413 | else if (r_type != R_MIPS16_26) |
| 2414 | { |
| 2415 | second = ((val >> 11) & 0xffe0) | (val & 0x1f); |
| 2416 | first = ((val >> 16) & 0xf800) | ((val >> 11) & 0x1f) | (val & 0x7e0); |
| 2417 | } |
| 2418 | else |
| 2419 | { |
| 2420 | second = val & 0xffff; |
| 2421 | first = ((val >> 16) & 0xfc00) | ((val >> 11) & 0x3e0) |
| 2422 | | ((val >> 21) & 0x1f); |
| 2423 | } |
| 2424 | bfd_put_16 (abfd, second, data + 2); |
| 2425 | bfd_put_16 (abfd, first, data); |
| 2426 | } |
| 2427 | |
| 2428 | bfd_reloc_status_type |
| 2429 | _bfd_mips_elf_gprel16_with_gp (bfd *abfd, asymbol *symbol, |
| 2430 | arelent *reloc_entry, asection *input_section, |
| 2431 | bfd_boolean relocatable, void *data, bfd_vma gp) |
| 2432 | { |
| 2433 | bfd_vma relocation; |
| 2434 | bfd_signed_vma val; |
| 2435 | bfd_reloc_status_type status; |
| 2436 | |
| 2437 | if (bfd_is_com_section (symbol->section)) |
| 2438 | relocation = 0; |
| 2439 | else |
| 2440 | relocation = symbol->value; |
| 2441 | |
| 2442 | relocation += symbol->section->output_section->vma; |
| 2443 | relocation += symbol->section->output_offset; |
| 2444 | |
| 2445 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 2446 | return bfd_reloc_outofrange; |
| 2447 | |
| 2448 | /* Set val to the offset into the section or symbol. */ |
| 2449 | val = reloc_entry->addend; |
| 2450 | |
| 2451 | _bfd_mips_elf_sign_extend (val, 16); |
| 2452 | |
| 2453 | /* Adjust val for the final section location and GP value. If we |
| 2454 | are producing relocatable output, we don't want to do this for |
| 2455 | an external symbol. */ |
| 2456 | if (! relocatable |
| 2457 | || (symbol->flags & BSF_SECTION_SYM) != 0) |
| 2458 | val += relocation - gp; |
| 2459 | |
| 2460 | if (reloc_entry->howto->partial_inplace) |
| 2461 | { |
| 2462 | status = _bfd_relocate_contents (reloc_entry->howto, abfd, val, |
| 2463 | (bfd_byte *) data |
| 2464 | + reloc_entry->address); |
| 2465 | if (status != bfd_reloc_ok) |
| 2466 | return status; |
| 2467 | } |
| 2468 | else |
| 2469 | reloc_entry->addend = val; |
| 2470 | |
| 2471 | if (relocatable) |
| 2472 | reloc_entry->address += input_section->output_offset; |
| 2473 | |
| 2474 | return bfd_reloc_ok; |
| 2475 | } |
| 2476 | |
| 2477 | /* Used to store a REL high-part relocation such as R_MIPS_HI16 or |
| 2478 | R_MIPS_GOT16. REL is the relocation, INPUT_SECTION is the section |
| 2479 | that contains the relocation field and DATA points to the start of |
| 2480 | INPUT_SECTION. */ |
| 2481 | |
| 2482 | struct mips_hi16 |
| 2483 | { |
| 2484 | struct mips_hi16 *next; |
| 2485 | bfd_byte *data; |
| 2486 | asection *input_section; |
| 2487 | arelent rel; |
| 2488 | }; |
| 2489 | |
| 2490 | /* FIXME: This should not be a static variable. */ |
| 2491 | |
| 2492 | static struct mips_hi16 *mips_hi16_list; |
| 2493 | |
| 2494 | /* A howto special_function for REL *HI16 relocations. We can only |
| 2495 | calculate the correct value once we've seen the partnering |
| 2496 | *LO16 relocation, so just save the information for later. |
| 2497 | |
| 2498 | The ABI requires that the *LO16 immediately follow the *HI16. |
| 2499 | However, as a GNU extension, we permit an arbitrary number of |
| 2500 | *HI16s to be associated with a single *LO16. This significantly |
| 2501 | simplies the relocation handling in gcc. */ |
| 2502 | |
| 2503 | bfd_reloc_status_type |
| 2504 | _bfd_mips_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, |
| 2505 | asymbol *symbol ATTRIBUTE_UNUSED, void *data, |
| 2506 | asection *input_section, bfd *output_bfd, |
| 2507 | char **error_message ATTRIBUTE_UNUSED) |
| 2508 | { |
| 2509 | struct mips_hi16 *n; |
| 2510 | |
| 2511 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 2512 | return bfd_reloc_outofrange; |
| 2513 | |
| 2514 | n = bfd_malloc (sizeof *n); |
| 2515 | if (n == NULL) |
| 2516 | return bfd_reloc_outofrange; |
| 2517 | |
| 2518 | n->next = mips_hi16_list; |
| 2519 | n->data = data; |
| 2520 | n->input_section = input_section; |
| 2521 | n->rel = *reloc_entry; |
| 2522 | mips_hi16_list = n; |
| 2523 | |
| 2524 | if (output_bfd != NULL) |
| 2525 | reloc_entry->address += input_section->output_offset; |
| 2526 | |
| 2527 | return bfd_reloc_ok; |
| 2528 | } |
| 2529 | |
| 2530 | /* A howto special_function for REL R_MIPS*_GOT16 relocations. This is just |
| 2531 | like any other 16-bit relocation when applied to global symbols, but is |
| 2532 | treated in the same as R_MIPS_HI16 when applied to local symbols. */ |
| 2533 | |
| 2534 | bfd_reloc_status_type |
| 2535 | _bfd_mips_elf_got16_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 2536 | void *data, asection *input_section, |
| 2537 | bfd *output_bfd, char **error_message) |
| 2538 | { |
| 2539 | if ((symbol->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 |
| 2540 | || bfd_is_und_section (bfd_asymbol_section (symbol)) |
| 2541 | || bfd_is_com_section (bfd_asymbol_section (symbol))) |
| 2542 | /* The relocation is against a global symbol. */ |
| 2543 | return _bfd_mips_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 2544 | input_section, output_bfd, |
| 2545 | error_message); |
| 2546 | |
| 2547 | return _bfd_mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, |
| 2548 | input_section, output_bfd, error_message); |
| 2549 | } |
| 2550 | |
| 2551 | /* A howto special_function for REL *LO16 relocations. The *LO16 itself |
| 2552 | is a straightforward 16 bit inplace relocation, but we must deal with |
| 2553 | any partnering high-part relocations as well. */ |
| 2554 | |
| 2555 | bfd_reloc_status_type |
| 2556 | _bfd_mips_elf_lo16_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 2557 | void *data, asection *input_section, |
| 2558 | bfd *output_bfd, char **error_message) |
| 2559 | { |
| 2560 | bfd_vma vallo; |
| 2561 | bfd_byte *location = (bfd_byte *) data + reloc_entry->address; |
| 2562 | |
| 2563 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 2564 | return bfd_reloc_outofrange; |
| 2565 | |
| 2566 | _bfd_mips_elf_reloc_unshuffle (abfd, reloc_entry->howto->type, FALSE, |
| 2567 | location); |
| 2568 | vallo = bfd_get_32 (abfd, location); |
| 2569 | _bfd_mips_elf_reloc_shuffle (abfd, reloc_entry->howto->type, FALSE, |
| 2570 | location); |
| 2571 | |
| 2572 | while (mips_hi16_list != NULL) |
| 2573 | { |
| 2574 | bfd_reloc_status_type ret; |
| 2575 | struct mips_hi16 *hi; |
| 2576 | |
| 2577 | hi = mips_hi16_list; |
| 2578 | |
| 2579 | /* R_MIPS*_GOT16 relocations are something of a special case. We |
| 2580 | want to install the addend in the same way as for a R_MIPS*_HI16 |
| 2581 | relocation (with a rightshift of 16). However, since GOT16 |
| 2582 | relocations can also be used with global symbols, their howto |
| 2583 | has a rightshift of 0. */ |
| 2584 | if (hi->rel.howto->type == R_MIPS_GOT16) |
| 2585 | hi->rel.howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, R_MIPS_HI16, FALSE); |
| 2586 | else if (hi->rel.howto->type == R_MIPS16_GOT16) |
| 2587 | hi->rel.howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, R_MIPS16_HI16, FALSE); |
| 2588 | else if (hi->rel.howto->type == R_MICROMIPS_GOT16) |
| 2589 | hi->rel.howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, R_MICROMIPS_HI16, FALSE); |
| 2590 | |
| 2591 | /* VALLO is a signed 16-bit number. Bias it by 0x8000 so that any |
| 2592 | carry or borrow will induce a change of +1 or -1 in the high part. */ |
| 2593 | hi->rel.addend += (vallo + 0x8000) & 0xffff; |
| 2594 | |
| 2595 | ret = _bfd_mips_elf_generic_reloc (abfd, &hi->rel, symbol, hi->data, |
| 2596 | hi->input_section, output_bfd, |
| 2597 | error_message); |
| 2598 | if (ret != bfd_reloc_ok) |
| 2599 | return ret; |
| 2600 | |
| 2601 | mips_hi16_list = hi->next; |
| 2602 | free (hi); |
| 2603 | } |
| 2604 | |
| 2605 | return _bfd_mips_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 2606 | input_section, output_bfd, |
| 2607 | error_message); |
| 2608 | } |
| 2609 | |
| 2610 | /* A generic howto special_function. This calculates and installs the |
| 2611 | relocation itself, thus avoiding the oft-discussed problems in |
| 2612 | bfd_perform_relocation and bfd_install_relocation. */ |
| 2613 | |
| 2614 | bfd_reloc_status_type |
| 2615 | _bfd_mips_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, |
| 2616 | asymbol *symbol, void *data ATTRIBUTE_UNUSED, |
| 2617 | asection *input_section, bfd *output_bfd, |
| 2618 | char **error_message ATTRIBUTE_UNUSED) |
| 2619 | { |
| 2620 | bfd_signed_vma val; |
| 2621 | bfd_reloc_status_type status; |
| 2622 | bfd_boolean relocatable; |
| 2623 | |
| 2624 | relocatable = (output_bfd != NULL); |
| 2625 | |
| 2626 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 2627 | return bfd_reloc_outofrange; |
| 2628 | |
| 2629 | /* Build up the field adjustment in VAL. */ |
| 2630 | val = 0; |
| 2631 | if (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0) |
| 2632 | { |
| 2633 | /* Either we're calculating the final field value or we have a |
| 2634 | relocation against a section symbol. Add in the section's |
| 2635 | offset or address. */ |
| 2636 | val += symbol->section->output_section->vma; |
| 2637 | val += symbol->section->output_offset; |
| 2638 | } |
| 2639 | |
| 2640 | if (!relocatable) |
| 2641 | { |
| 2642 | /* We're calculating the final field value. Add in the symbol's value |
| 2643 | and, if pc-relative, subtract the address of the field itself. */ |
| 2644 | val += symbol->value; |
| 2645 | if (reloc_entry->howto->pc_relative) |
| 2646 | { |
| 2647 | val -= input_section->output_section->vma; |
| 2648 | val -= input_section->output_offset; |
| 2649 | val -= reloc_entry->address; |
| 2650 | } |
| 2651 | } |
| 2652 | |
| 2653 | /* VAL is now the final adjustment. If we're keeping this relocation |
| 2654 | in the output file, and if the relocation uses a separate addend, |
| 2655 | we just need to add VAL to that addend. Otherwise we need to add |
| 2656 | VAL to the relocation field itself. */ |
| 2657 | if (relocatable && !reloc_entry->howto->partial_inplace) |
| 2658 | reloc_entry->addend += val; |
| 2659 | else |
| 2660 | { |
| 2661 | bfd_byte *location = (bfd_byte *) data + reloc_entry->address; |
| 2662 | |
| 2663 | /* Add in the separate addend, if any. */ |
| 2664 | val += reloc_entry->addend; |
| 2665 | |
| 2666 | /* Add VAL to the relocation field. */ |
| 2667 | _bfd_mips_elf_reloc_unshuffle (abfd, reloc_entry->howto->type, FALSE, |
| 2668 | location); |
| 2669 | status = _bfd_relocate_contents (reloc_entry->howto, abfd, val, |
| 2670 | location); |
| 2671 | _bfd_mips_elf_reloc_shuffle (abfd, reloc_entry->howto->type, FALSE, |
| 2672 | location); |
| 2673 | |
| 2674 | if (status != bfd_reloc_ok) |
| 2675 | return status; |
| 2676 | } |
| 2677 | |
| 2678 | if (relocatable) |
| 2679 | reloc_entry->address += input_section->output_offset; |
| 2680 | |
| 2681 | return bfd_reloc_ok; |
| 2682 | } |
| 2683 | \f |
| 2684 | /* Swap an entry in a .gptab section. Note that these routines rely |
| 2685 | on the equivalence of the two elements of the union. */ |
| 2686 | |
| 2687 | static void |
| 2688 | bfd_mips_elf32_swap_gptab_in (bfd *abfd, const Elf32_External_gptab *ex, |
| 2689 | Elf32_gptab *in) |
| 2690 | { |
| 2691 | in->gt_entry.gt_g_value = H_GET_32 (abfd, ex->gt_entry.gt_g_value); |
| 2692 | in->gt_entry.gt_bytes = H_GET_32 (abfd, ex->gt_entry.gt_bytes); |
| 2693 | } |
| 2694 | |
| 2695 | static void |
| 2696 | bfd_mips_elf32_swap_gptab_out (bfd *abfd, const Elf32_gptab *in, |
| 2697 | Elf32_External_gptab *ex) |
| 2698 | { |
| 2699 | H_PUT_32 (abfd, in->gt_entry.gt_g_value, ex->gt_entry.gt_g_value); |
| 2700 | H_PUT_32 (abfd, in->gt_entry.gt_bytes, ex->gt_entry.gt_bytes); |
| 2701 | } |
| 2702 | |
| 2703 | static void |
| 2704 | bfd_elf32_swap_compact_rel_out (bfd *abfd, const Elf32_compact_rel *in, |
| 2705 | Elf32_External_compact_rel *ex) |
| 2706 | { |
| 2707 | H_PUT_32 (abfd, in->id1, ex->id1); |
| 2708 | H_PUT_32 (abfd, in->num, ex->num); |
| 2709 | H_PUT_32 (abfd, in->id2, ex->id2); |
| 2710 | H_PUT_32 (abfd, in->offset, ex->offset); |
| 2711 | H_PUT_32 (abfd, in->reserved0, ex->reserved0); |
| 2712 | H_PUT_32 (abfd, in->reserved1, ex->reserved1); |
| 2713 | } |
| 2714 | |
| 2715 | static void |
| 2716 | bfd_elf32_swap_crinfo_out (bfd *abfd, const Elf32_crinfo *in, |
| 2717 | Elf32_External_crinfo *ex) |
| 2718 | { |
| 2719 | unsigned long l; |
| 2720 | |
| 2721 | l = (((in->ctype & CRINFO_CTYPE) << CRINFO_CTYPE_SH) |
| 2722 | | ((in->rtype & CRINFO_RTYPE) << CRINFO_RTYPE_SH) |
| 2723 | | ((in->dist2to & CRINFO_DIST2TO) << CRINFO_DIST2TO_SH) |
| 2724 | | ((in->relvaddr & CRINFO_RELVADDR) << CRINFO_RELVADDR_SH)); |
| 2725 | H_PUT_32 (abfd, l, ex->info); |
| 2726 | H_PUT_32 (abfd, in->konst, ex->konst); |
| 2727 | H_PUT_32 (abfd, in->vaddr, ex->vaddr); |
| 2728 | } |
| 2729 | \f |
| 2730 | /* A .reginfo section holds a single Elf32_RegInfo structure. These |
| 2731 | routines swap this structure in and out. They are used outside of |
| 2732 | BFD, so they are globally visible. */ |
| 2733 | |
| 2734 | void |
| 2735 | bfd_mips_elf32_swap_reginfo_in (bfd *abfd, const Elf32_External_RegInfo *ex, |
| 2736 | Elf32_RegInfo *in) |
| 2737 | { |
| 2738 | in->ri_gprmask = H_GET_32 (abfd, ex->ri_gprmask); |
| 2739 | in->ri_cprmask[0] = H_GET_32 (abfd, ex->ri_cprmask[0]); |
| 2740 | in->ri_cprmask[1] = H_GET_32 (abfd, ex->ri_cprmask[1]); |
| 2741 | in->ri_cprmask[2] = H_GET_32 (abfd, ex->ri_cprmask[2]); |
| 2742 | in->ri_cprmask[3] = H_GET_32 (abfd, ex->ri_cprmask[3]); |
| 2743 | in->ri_gp_value = H_GET_32 (abfd, ex->ri_gp_value); |
| 2744 | } |
| 2745 | |
| 2746 | void |
| 2747 | bfd_mips_elf32_swap_reginfo_out (bfd *abfd, const Elf32_RegInfo *in, |
| 2748 | Elf32_External_RegInfo *ex) |
| 2749 | { |
| 2750 | H_PUT_32 (abfd, in->ri_gprmask, ex->ri_gprmask); |
| 2751 | H_PUT_32 (abfd, in->ri_cprmask[0], ex->ri_cprmask[0]); |
| 2752 | H_PUT_32 (abfd, in->ri_cprmask[1], ex->ri_cprmask[1]); |
| 2753 | H_PUT_32 (abfd, in->ri_cprmask[2], ex->ri_cprmask[2]); |
| 2754 | H_PUT_32 (abfd, in->ri_cprmask[3], ex->ri_cprmask[3]); |
| 2755 | H_PUT_32 (abfd, in->ri_gp_value, ex->ri_gp_value); |
| 2756 | } |
| 2757 | |
| 2758 | /* In the 64 bit ABI, the .MIPS.options section holds register |
| 2759 | information in an Elf64_Reginfo structure. These routines swap |
| 2760 | them in and out. They are globally visible because they are used |
| 2761 | outside of BFD. These routines are here so that gas can call them |
| 2762 | without worrying about whether the 64 bit ABI has been included. */ |
| 2763 | |
| 2764 | void |
| 2765 | bfd_mips_elf64_swap_reginfo_in (bfd *abfd, const Elf64_External_RegInfo *ex, |
| 2766 | Elf64_Internal_RegInfo *in) |
| 2767 | { |
| 2768 | in->ri_gprmask = H_GET_32 (abfd, ex->ri_gprmask); |
| 2769 | in->ri_pad = H_GET_32 (abfd, ex->ri_pad); |
| 2770 | in->ri_cprmask[0] = H_GET_32 (abfd, ex->ri_cprmask[0]); |
| 2771 | in->ri_cprmask[1] = H_GET_32 (abfd, ex->ri_cprmask[1]); |
| 2772 | in->ri_cprmask[2] = H_GET_32 (abfd, ex->ri_cprmask[2]); |
| 2773 | in->ri_cprmask[3] = H_GET_32 (abfd, ex->ri_cprmask[3]); |
| 2774 | in->ri_gp_value = H_GET_64 (abfd, ex->ri_gp_value); |
| 2775 | } |
| 2776 | |
| 2777 | void |
| 2778 | bfd_mips_elf64_swap_reginfo_out (bfd *abfd, const Elf64_Internal_RegInfo *in, |
| 2779 | Elf64_External_RegInfo *ex) |
| 2780 | { |
| 2781 | H_PUT_32 (abfd, in->ri_gprmask, ex->ri_gprmask); |
| 2782 | H_PUT_32 (abfd, in->ri_pad, ex->ri_pad); |
| 2783 | H_PUT_32 (abfd, in->ri_cprmask[0], ex->ri_cprmask[0]); |
| 2784 | H_PUT_32 (abfd, in->ri_cprmask[1], ex->ri_cprmask[1]); |
| 2785 | H_PUT_32 (abfd, in->ri_cprmask[2], ex->ri_cprmask[2]); |
| 2786 | H_PUT_32 (abfd, in->ri_cprmask[3], ex->ri_cprmask[3]); |
| 2787 | H_PUT_64 (abfd, in->ri_gp_value, ex->ri_gp_value); |
| 2788 | } |
| 2789 | |
| 2790 | /* Swap in an options header. */ |
| 2791 | |
| 2792 | void |
| 2793 | bfd_mips_elf_swap_options_in (bfd *abfd, const Elf_External_Options *ex, |
| 2794 | Elf_Internal_Options *in) |
| 2795 | { |
| 2796 | in->kind = H_GET_8 (abfd, ex->kind); |
| 2797 | in->size = H_GET_8 (abfd, ex->size); |
| 2798 | in->section = H_GET_16 (abfd, ex->section); |
| 2799 | in->info = H_GET_32 (abfd, ex->info); |
| 2800 | } |
| 2801 | |
| 2802 | /* Swap out an options header. */ |
| 2803 | |
| 2804 | void |
| 2805 | bfd_mips_elf_swap_options_out (bfd *abfd, const Elf_Internal_Options *in, |
| 2806 | Elf_External_Options *ex) |
| 2807 | { |
| 2808 | H_PUT_8 (abfd, in->kind, ex->kind); |
| 2809 | H_PUT_8 (abfd, in->size, ex->size); |
| 2810 | H_PUT_16 (abfd, in->section, ex->section); |
| 2811 | H_PUT_32 (abfd, in->info, ex->info); |
| 2812 | } |
| 2813 | |
| 2814 | /* Swap in an abiflags structure. */ |
| 2815 | |
| 2816 | void |
| 2817 | bfd_mips_elf_swap_abiflags_v0_in (bfd *abfd, |
| 2818 | const Elf_External_ABIFlags_v0 *ex, |
| 2819 | Elf_Internal_ABIFlags_v0 *in) |
| 2820 | { |
| 2821 | in->version = H_GET_16 (abfd, ex->version); |
| 2822 | in->isa_level = H_GET_8 (abfd, ex->isa_level); |
| 2823 | in->isa_rev = H_GET_8 (abfd, ex->isa_rev); |
| 2824 | in->gpr_size = H_GET_8 (abfd, ex->gpr_size); |
| 2825 | in->cpr1_size = H_GET_8 (abfd, ex->cpr1_size); |
| 2826 | in->cpr2_size = H_GET_8 (abfd, ex->cpr2_size); |
| 2827 | in->fp_abi = H_GET_8 (abfd, ex->fp_abi); |
| 2828 | in->isa_ext = H_GET_32 (abfd, ex->isa_ext); |
| 2829 | in->ases = H_GET_32 (abfd, ex->ases); |
| 2830 | in->flags1 = H_GET_32 (abfd, ex->flags1); |
| 2831 | in->flags2 = H_GET_32 (abfd, ex->flags2); |
| 2832 | } |
| 2833 | |
| 2834 | /* Swap out an abiflags structure. */ |
| 2835 | |
| 2836 | void |
| 2837 | bfd_mips_elf_swap_abiflags_v0_out (bfd *abfd, |
| 2838 | const Elf_Internal_ABIFlags_v0 *in, |
| 2839 | Elf_External_ABIFlags_v0 *ex) |
| 2840 | { |
| 2841 | H_PUT_16 (abfd, in->version, ex->version); |
| 2842 | H_PUT_8 (abfd, in->isa_level, ex->isa_level); |
| 2843 | H_PUT_8 (abfd, in->isa_rev, ex->isa_rev); |
| 2844 | H_PUT_8 (abfd, in->gpr_size, ex->gpr_size); |
| 2845 | H_PUT_8 (abfd, in->cpr1_size, ex->cpr1_size); |
| 2846 | H_PUT_8 (abfd, in->cpr2_size, ex->cpr2_size); |
| 2847 | H_PUT_8 (abfd, in->fp_abi, ex->fp_abi); |
| 2848 | H_PUT_32 (abfd, in->isa_ext, ex->isa_ext); |
| 2849 | H_PUT_32 (abfd, in->ases, ex->ases); |
| 2850 | H_PUT_32 (abfd, in->flags1, ex->flags1); |
| 2851 | H_PUT_32 (abfd, in->flags2, ex->flags2); |
| 2852 | } |
| 2853 | \f |
| 2854 | /* This function is called via qsort() to sort the dynamic relocation |
| 2855 | entries by increasing r_symndx value. */ |
| 2856 | |
| 2857 | static int |
| 2858 | sort_dynamic_relocs (const void *arg1, const void *arg2) |
| 2859 | { |
| 2860 | Elf_Internal_Rela int_reloc1; |
| 2861 | Elf_Internal_Rela int_reloc2; |
| 2862 | int diff; |
| 2863 | |
| 2864 | bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg1, &int_reloc1); |
| 2865 | bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg2, &int_reloc2); |
| 2866 | |
| 2867 | diff = ELF32_R_SYM (int_reloc1.r_info) - ELF32_R_SYM (int_reloc2.r_info); |
| 2868 | if (diff != 0) |
| 2869 | return diff; |
| 2870 | |
| 2871 | if (int_reloc1.r_offset < int_reloc2.r_offset) |
| 2872 | return -1; |
| 2873 | if (int_reloc1.r_offset > int_reloc2.r_offset) |
| 2874 | return 1; |
| 2875 | return 0; |
| 2876 | } |
| 2877 | |
| 2878 | /* Like sort_dynamic_relocs, but used for elf64 relocations. */ |
| 2879 | |
| 2880 | static int |
| 2881 | sort_dynamic_relocs_64 (const void *arg1 ATTRIBUTE_UNUSED, |
| 2882 | const void *arg2 ATTRIBUTE_UNUSED) |
| 2883 | { |
| 2884 | #ifdef BFD64 |
| 2885 | Elf_Internal_Rela int_reloc1[3]; |
| 2886 | Elf_Internal_Rela int_reloc2[3]; |
| 2887 | |
| 2888 | (*get_elf_backend_data (reldyn_sorting_bfd)->s->swap_reloc_in) |
| 2889 | (reldyn_sorting_bfd, arg1, int_reloc1); |
| 2890 | (*get_elf_backend_data (reldyn_sorting_bfd)->s->swap_reloc_in) |
| 2891 | (reldyn_sorting_bfd, arg2, int_reloc2); |
| 2892 | |
| 2893 | if (ELF64_R_SYM (int_reloc1[0].r_info) < ELF64_R_SYM (int_reloc2[0].r_info)) |
| 2894 | return -1; |
| 2895 | if (ELF64_R_SYM (int_reloc1[0].r_info) > ELF64_R_SYM (int_reloc2[0].r_info)) |
| 2896 | return 1; |
| 2897 | |
| 2898 | if (int_reloc1[0].r_offset < int_reloc2[0].r_offset) |
| 2899 | return -1; |
| 2900 | if (int_reloc1[0].r_offset > int_reloc2[0].r_offset) |
| 2901 | return 1; |
| 2902 | return 0; |
| 2903 | #else |
| 2904 | abort (); |
| 2905 | #endif |
| 2906 | } |
| 2907 | |
| 2908 | |
| 2909 | /* This routine is used to write out ECOFF debugging external symbol |
| 2910 | information. It is called via mips_elf_link_hash_traverse. The |
| 2911 | ECOFF external symbol information must match the ELF external |
| 2912 | symbol information. Unfortunately, at this point we don't know |
| 2913 | whether a symbol is required by reloc information, so the two |
| 2914 | tables may wind up being different. We must sort out the external |
| 2915 | symbol information before we can set the final size of the .mdebug |
| 2916 | section, and we must set the size of the .mdebug section before we |
| 2917 | can relocate any sections, and we can't know which symbols are |
| 2918 | required by relocation until we relocate the sections. |
| 2919 | Fortunately, it is relatively unlikely that any symbol will be |
| 2920 | stripped but required by a reloc. In particular, it can not happen |
| 2921 | when generating a final executable. */ |
| 2922 | |
| 2923 | static bfd_boolean |
| 2924 | mips_elf_output_extsym (struct mips_elf_link_hash_entry *h, void *data) |
| 2925 | { |
| 2926 | struct extsym_info *einfo = data; |
| 2927 | bfd_boolean strip; |
| 2928 | asection *sec, *output_section; |
| 2929 | |
| 2930 | if (h->root.indx == -2) |
| 2931 | strip = FALSE; |
| 2932 | else if ((h->root.def_dynamic |
| 2933 | || h->root.ref_dynamic |
| 2934 | || h->root.type == bfd_link_hash_new) |
| 2935 | && !h->root.def_regular |
| 2936 | && !h->root.ref_regular) |
| 2937 | strip = TRUE; |
| 2938 | else if (einfo->info->strip == strip_all |
| 2939 | || (einfo->info->strip == strip_some |
| 2940 | && bfd_hash_lookup (einfo->info->keep_hash, |
| 2941 | h->root.root.root.string, |
| 2942 | FALSE, FALSE) == NULL)) |
| 2943 | strip = TRUE; |
| 2944 | else |
| 2945 | strip = FALSE; |
| 2946 | |
| 2947 | if (strip) |
| 2948 | return TRUE; |
| 2949 | |
| 2950 | if (h->esym.ifd == -2) |
| 2951 | { |
| 2952 | h->esym.jmptbl = 0; |
| 2953 | h->esym.cobol_main = 0; |
| 2954 | h->esym.weakext = 0; |
| 2955 | h->esym.reserved = 0; |
| 2956 | h->esym.ifd = ifdNil; |
| 2957 | h->esym.asym.value = 0; |
| 2958 | h->esym.asym.st = stGlobal; |
| 2959 | |
| 2960 | if (h->root.root.type == bfd_link_hash_undefined |
| 2961 | || h->root.root.type == bfd_link_hash_undefweak) |
| 2962 | { |
| 2963 | const char *name; |
| 2964 | |
| 2965 | /* Use undefined class. Also, set class and type for some |
| 2966 | special symbols. */ |
| 2967 | name = h->root.root.root.string; |
| 2968 | if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0 |
| 2969 | || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0) |
| 2970 | { |
| 2971 | h->esym.asym.sc = scData; |
| 2972 | h->esym.asym.st = stLabel; |
| 2973 | h->esym.asym.value = 0; |
| 2974 | } |
| 2975 | else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0) |
| 2976 | { |
| 2977 | h->esym.asym.sc = scAbs; |
| 2978 | h->esym.asym.st = stLabel; |
| 2979 | h->esym.asym.value = |
| 2980 | mips_elf_hash_table (einfo->info)->procedure_count; |
| 2981 | } |
| 2982 | else |
| 2983 | h->esym.asym.sc = scUndefined; |
| 2984 | } |
| 2985 | else if (h->root.root.type != bfd_link_hash_defined |
| 2986 | && h->root.root.type != bfd_link_hash_defweak) |
| 2987 | h->esym.asym.sc = scAbs; |
| 2988 | else |
| 2989 | { |
| 2990 | const char *name; |
| 2991 | |
| 2992 | sec = h->root.root.u.def.section; |
| 2993 | output_section = sec->output_section; |
| 2994 | |
| 2995 | /* When making a shared library and symbol h is the one from |
| 2996 | the another shared library, OUTPUT_SECTION may be null. */ |
| 2997 | if (output_section == NULL) |
| 2998 | h->esym.asym.sc = scUndefined; |
| 2999 | else |
| 3000 | { |
| 3001 | name = bfd_section_name (output_section); |
| 3002 | |
| 3003 | if (strcmp (name, ".text") == 0) |
| 3004 | h->esym.asym.sc = scText; |
| 3005 | else if (strcmp (name, ".data") == 0) |
| 3006 | h->esym.asym.sc = scData; |
| 3007 | else if (strcmp (name, ".sdata") == 0) |
| 3008 | h->esym.asym.sc = scSData; |
| 3009 | else if (strcmp (name, ".rodata") == 0 |
| 3010 | || strcmp (name, ".rdata") == 0) |
| 3011 | h->esym.asym.sc = scRData; |
| 3012 | else if (strcmp (name, ".bss") == 0) |
| 3013 | h->esym.asym.sc = scBss; |
| 3014 | else if (strcmp (name, ".sbss") == 0) |
| 3015 | h->esym.asym.sc = scSBss; |
| 3016 | else if (strcmp (name, ".init") == 0) |
| 3017 | h->esym.asym.sc = scInit; |
| 3018 | else if (strcmp (name, ".fini") == 0) |
| 3019 | h->esym.asym.sc = scFini; |
| 3020 | else |
| 3021 | h->esym.asym.sc = scAbs; |
| 3022 | } |
| 3023 | } |
| 3024 | |
| 3025 | h->esym.asym.reserved = 0; |
| 3026 | h->esym.asym.index = indexNil; |
| 3027 | } |
| 3028 | |
| 3029 | if (h->root.root.type == bfd_link_hash_common) |
| 3030 | h->esym.asym.value = h->root.root.u.c.size; |
| 3031 | else if (h->root.root.type == bfd_link_hash_defined |
| 3032 | || h->root.root.type == bfd_link_hash_defweak) |
| 3033 | { |
| 3034 | if (h->esym.asym.sc == scCommon) |
| 3035 | h->esym.asym.sc = scBss; |
| 3036 | else if (h->esym.asym.sc == scSCommon) |
| 3037 | h->esym.asym.sc = scSBss; |
| 3038 | |
| 3039 | sec = h->root.root.u.def.section; |
| 3040 | output_section = sec->output_section; |
| 3041 | if (output_section != NULL) |
| 3042 | h->esym.asym.value = (h->root.root.u.def.value |
| 3043 | + sec->output_offset |
| 3044 | + output_section->vma); |
| 3045 | else |
| 3046 | h->esym.asym.value = 0; |
| 3047 | } |
| 3048 | else |
| 3049 | { |
| 3050 | struct mips_elf_link_hash_entry *hd = h; |
| 3051 | |
| 3052 | while (hd->root.root.type == bfd_link_hash_indirect) |
| 3053 | hd = (struct mips_elf_link_hash_entry *)h->root.root.u.i.link; |
| 3054 | |
| 3055 | if (hd->needs_lazy_stub) |
| 3056 | { |
| 3057 | BFD_ASSERT (hd->root.plt.plist != NULL); |
| 3058 | BFD_ASSERT (hd->root.plt.plist->stub_offset != MINUS_ONE); |
| 3059 | /* Set type and value for a symbol with a function stub. */ |
| 3060 | h->esym.asym.st = stProc; |
| 3061 | sec = hd->root.root.u.def.section; |
| 3062 | if (sec == NULL) |
| 3063 | h->esym.asym.value = 0; |
| 3064 | else |
| 3065 | { |
| 3066 | output_section = sec->output_section; |
| 3067 | if (output_section != NULL) |
| 3068 | h->esym.asym.value = (hd->root.plt.plist->stub_offset |
| 3069 | + sec->output_offset |
| 3070 | + output_section->vma); |
| 3071 | else |
| 3072 | h->esym.asym.value = 0; |
| 3073 | } |
| 3074 | } |
| 3075 | } |
| 3076 | |
| 3077 | if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, |
| 3078 | h->root.root.root.string, |
| 3079 | &h->esym)) |
| 3080 | { |
| 3081 | einfo->failed = TRUE; |
| 3082 | return FALSE; |
| 3083 | } |
| 3084 | |
| 3085 | return TRUE; |
| 3086 | } |
| 3087 | |
| 3088 | /* A comparison routine used to sort .gptab entries. */ |
| 3089 | |
| 3090 | static int |
| 3091 | gptab_compare (const void *p1, const void *p2) |
| 3092 | { |
| 3093 | const Elf32_gptab *a1 = p1; |
| 3094 | const Elf32_gptab *a2 = p2; |
| 3095 | |
| 3096 | return a1->gt_entry.gt_g_value - a2->gt_entry.gt_g_value; |
| 3097 | } |
| 3098 | \f |
| 3099 | /* Functions to manage the got entry hash table. */ |
| 3100 | |
| 3101 | /* Use all 64 bits of a bfd_vma for the computation of a 32-bit |
| 3102 | hash number. */ |
| 3103 | |
| 3104 | static INLINE hashval_t |
| 3105 | mips_elf_hash_bfd_vma (bfd_vma addr) |
| 3106 | { |
| 3107 | #ifdef BFD64 |
| 3108 | return addr + (addr >> 32); |
| 3109 | #else |
| 3110 | return addr; |
| 3111 | #endif |
| 3112 | } |
| 3113 | |
| 3114 | static hashval_t |
| 3115 | mips_elf_got_entry_hash (const void *entry_) |
| 3116 | { |
| 3117 | const struct mips_got_entry *entry = (struct mips_got_entry *)entry_; |
| 3118 | |
| 3119 | return (entry->symndx |
| 3120 | + ((entry->tls_type == GOT_TLS_LDM) << 18) |
| 3121 | + (entry->tls_type == GOT_TLS_LDM ? 0 |
| 3122 | : !entry->abfd ? mips_elf_hash_bfd_vma (entry->d.address) |
| 3123 | : entry->symndx >= 0 ? (entry->abfd->id |
| 3124 | + mips_elf_hash_bfd_vma (entry->d.addend)) |
| 3125 | : entry->d.h->root.root.root.hash)); |
| 3126 | } |
| 3127 | |
| 3128 | static int |
| 3129 | mips_elf_got_entry_eq (const void *entry1, const void *entry2) |
| 3130 | { |
| 3131 | const struct mips_got_entry *e1 = (struct mips_got_entry *)entry1; |
| 3132 | const struct mips_got_entry *e2 = (struct mips_got_entry *)entry2; |
| 3133 | |
| 3134 | return (e1->symndx == e2->symndx |
| 3135 | && e1->tls_type == e2->tls_type |
| 3136 | && (e1->tls_type == GOT_TLS_LDM ? TRUE |
| 3137 | : !e1->abfd ? !e2->abfd && e1->d.address == e2->d.address |
| 3138 | : e1->symndx >= 0 ? (e1->abfd == e2->abfd |
| 3139 | && e1->d.addend == e2->d.addend) |
| 3140 | : e2->abfd && e1->d.h == e2->d.h)); |
| 3141 | } |
| 3142 | |
| 3143 | static hashval_t |
| 3144 | mips_got_page_ref_hash (const void *ref_) |
| 3145 | { |
| 3146 | const struct mips_got_page_ref *ref; |
| 3147 | |
| 3148 | ref = (const struct mips_got_page_ref *) ref_; |
| 3149 | return ((ref->symndx >= 0 |
| 3150 | ? (hashval_t) (ref->u.abfd->id + ref->symndx) |
| 3151 | : ref->u.h->root.root.root.hash) |
| 3152 | + mips_elf_hash_bfd_vma (ref->addend)); |
| 3153 | } |
| 3154 | |
| 3155 | static int |
| 3156 | mips_got_page_ref_eq (const void *ref1_, const void *ref2_) |
| 3157 | { |
| 3158 | const struct mips_got_page_ref *ref1, *ref2; |
| 3159 | |
| 3160 | ref1 = (const struct mips_got_page_ref *) ref1_; |
| 3161 | ref2 = (const struct mips_got_page_ref *) ref2_; |
| 3162 | return (ref1->symndx == ref2->symndx |
| 3163 | && (ref1->symndx < 0 |
| 3164 | ? ref1->u.h == ref2->u.h |
| 3165 | : ref1->u.abfd == ref2->u.abfd) |
| 3166 | && ref1->addend == ref2->addend); |
| 3167 | } |
| 3168 | |
| 3169 | static hashval_t |
| 3170 | mips_got_page_entry_hash (const void *entry_) |
| 3171 | { |
| 3172 | const struct mips_got_page_entry *entry; |
| 3173 | |
| 3174 | entry = (const struct mips_got_page_entry *) entry_; |
| 3175 | return entry->sec->id; |
| 3176 | } |
| 3177 | |
| 3178 | static int |
| 3179 | mips_got_page_entry_eq (const void *entry1_, const void *entry2_) |
| 3180 | { |
| 3181 | const struct mips_got_page_entry *entry1, *entry2; |
| 3182 | |
| 3183 | entry1 = (const struct mips_got_page_entry *) entry1_; |
| 3184 | entry2 = (const struct mips_got_page_entry *) entry2_; |
| 3185 | return entry1->sec == entry2->sec; |
| 3186 | } |
| 3187 | \f |
| 3188 | /* Create and return a new mips_got_info structure. */ |
| 3189 | |
| 3190 | static struct mips_got_info * |
| 3191 | mips_elf_create_got_info (bfd *abfd) |
| 3192 | { |
| 3193 | struct mips_got_info *g; |
| 3194 | |
| 3195 | g = bfd_zalloc (abfd, sizeof (struct mips_got_info)); |
| 3196 | if (g == NULL) |
| 3197 | return NULL; |
| 3198 | |
| 3199 | g->got_entries = htab_try_create (1, mips_elf_got_entry_hash, |
| 3200 | mips_elf_got_entry_eq, NULL); |
| 3201 | if (g->got_entries == NULL) |
| 3202 | return NULL; |
| 3203 | |
| 3204 | g->got_page_refs = htab_try_create (1, mips_got_page_ref_hash, |
| 3205 | mips_got_page_ref_eq, NULL); |
| 3206 | if (g->got_page_refs == NULL) |
| 3207 | return NULL; |
| 3208 | |
| 3209 | return g; |
| 3210 | } |
| 3211 | |
| 3212 | /* Return the GOT info for input bfd ABFD, trying to create a new one if |
| 3213 | CREATE_P and if ABFD doesn't already have a GOT. */ |
| 3214 | |
| 3215 | static struct mips_got_info * |
| 3216 | mips_elf_bfd_got (bfd *abfd, bfd_boolean create_p) |
| 3217 | { |
| 3218 | struct mips_elf_obj_tdata *tdata; |
| 3219 | |
| 3220 | if (!is_mips_elf (abfd)) |
| 3221 | return NULL; |
| 3222 | |
| 3223 | tdata = mips_elf_tdata (abfd); |
| 3224 | if (!tdata->got && create_p) |
| 3225 | tdata->got = mips_elf_create_got_info (abfd); |
| 3226 | return tdata->got; |
| 3227 | } |
| 3228 | |
| 3229 | /* Record that ABFD should use output GOT G. */ |
| 3230 | |
| 3231 | static void |
| 3232 | mips_elf_replace_bfd_got (bfd *abfd, struct mips_got_info *g) |
| 3233 | { |
| 3234 | struct mips_elf_obj_tdata *tdata; |
| 3235 | |
| 3236 | BFD_ASSERT (is_mips_elf (abfd)); |
| 3237 | tdata = mips_elf_tdata (abfd); |
| 3238 | if (tdata->got) |
| 3239 | { |
| 3240 | /* The GOT structure itself and the hash table entries are |
| 3241 | allocated to a bfd, but the hash tables aren't. */ |
| 3242 | htab_delete (tdata->got->got_entries); |
| 3243 | htab_delete (tdata->got->got_page_refs); |
| 3244 | if (tdata->got->got_page_entries) |
| 3245 | htab_delete (tdata->got->got_page_entries); |
| 3246 | } |
| 3247 | tdata->got = g; |
| 3248 | } |
| 3249 | |
| 3250 | /* Return the dynamic relocation section. If it doesn't exist, try to |
| 3251 | create a new it if CREATE_P, otherwise return NULL. Also return NULL |
| 3252 | if creation fails. */ |
| 3253 | |
| 3254 | static asection * |
| 3255 | mips_elf_rel_dyn_section (struct bfd_link_info *info, bfd_boolean create_p) |
| 3256 | { |
| 3257 | const char *dname; |
| 3258 | asection *sreloc; |
| 3259 | bfd *dynobj; |
| 3260 | |
| 3261 | dname = MIPS_ELF_REL_DYN_NAME (info); |
| 3262 | dynobj = elf_hash_table (info)->dynobj; |
| 3263 | sreloc = bfd_get_linker_section (dynobj, dname); |
| 3264 | if (sreloc == NULL && create_p) |
| 3265 | { |
| 3266 | sreloc = bfd_make_section_anyway_with_flags (dynobj, dname, |
| 3267 | (SEC_ALLOC |
| 3268 | | SEC_LOAD |
| 3269 | | SEC_HAS_CONTENTS |
| 3270 | | SEC_IN_MEMORY |
| 3271 | | SEC_LINKER_CREATED |
| 3272 | | SEC_READONLY)); |
| 3273 | if (sreloc == NULL |
| 3274 | || !bfd_set_section_alignment (sreloc, |
| 3275 | MIPS_ELF_LOG_FILE_ALIGN (dynobj))) |
| 3276 | return NULL; |
| 3277 | } |
| 3278 | return sreloc; |
| 3279 | } |
| 3280 | |
| 3281 | /* Return the GOT_TLS_* type required by relocation type R_TYPE. */ |
| 3282 | |
| 3283 | static int |
| 3284 | mips_elf_reloc_tls_type (unsigned int r_type) |
| 3285 | { |
| 3286 | if (tls_gd_reloc_p (r_type)) |
| 3287 | return GOT_TLS_GD; |
| 3288 | |
| 3289 | if (tls_ldm_reloc_p (r_type)) |
| 3290 | return GOT_TLS_LDM; |
| 3291 | |
| 3292 | if (tls_gottprel_reloc_p (r_type)) |
| 3293 | return GOT_TLS_IE; |
| 3294 | |
| 3295 | return GOT_TLS_NONE; |
| 3296 | } |
| 3297 | |
| 3298 | /* Return the number of GOT slots needed for GOT TLS type TYPE. */ |
| 3299 | |
| 3300 | static int |
| 3301 | mips_tls_got_entries (unsigned int type) |
| 3302 | { |
| 3303 | switch (type) |
| 3304 | { |
| 3305 | case GOT_TLS_GD: |
| 3306 | case GOT_TLS_LDM: |
| 3307 | return 2; |
| 3308 | |
| 3309 | case GOT_TLS_IE: |
| 3310 | return 1; |
| 3311 | |
| 3312 | case GOT_TLS_NONE: |
| 3313 | return 0; |
| 3314 | } |
| 3315 | abort (); |
| 3316 | } |
| 3317 | |
| 3318 | /* Count the number of relocations needed for a TLS GOT entry, with |
| 3319 | access types from TLS_TYPE, and symbol H (or a local symbol if H |
| 3320 | is NULL). */ |
| 3321 | |
| 3322 | static int |
| 3323 | mips_tls_got_relocs (struct bfd_link_info *info, unsigned char tls_type, |
| 3324 | struct elf_link_hash_entry *h) |
| 3325 | { |
| 3326 | int indx = 0; |
| 3327 | bfd_boolean need_relocs = FALSE; |
| 3328 | bfd_boolean dyn = elf_hash_table (info)->dynamic_sections_created; |
| 3329 | |
| 3330 | if (h != NULL |
| 3331 | && h->dynindx != -1 |
| 3332 | && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
| 3333 | && (bfd_link_dll (info) || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 3334 | indx = h->dynindx; |
| 3335 | |
| 3336 | if ((bfd_link_dll (info) || indx != 0) |
| 3337 | && (h == NULL |
| 3338 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 3339 | || h->root.type != bfd_link_hash_undefweak)) |
| 3340 | need_relocs = TRUE; |
| 3341 | |
| 3342 | if (!need_relocs) |
| 3343 | return 0; |
| 3344 | |
| 3345 | switch (tls_type) |
| 3346 | { |
| 3347 | case GOT_TLS_GD: |
| 3348 | return indx != 0 ? 2 : 1; |
| 3349 | |
| 3350 | case GOT_TLS_IE: |
| 3351 | return 1; |
| 3352 | |
| 3353 | case GOT_TLS_LDM: |
| 3354 | return bfd_link_dll (info) ? 1 : 0; |
| 3355 | |
| 3356 | default: |
| 3357 | return 0; |
| 3358 | } |
| 3359 | } |
| 3360 | |
| 3361 | /* Add the number of GOT entries and TLS relocations required by ENTRY |
| 3362 | to G. */ |
| 3363 | |
| 3364 | static void |
| 3365 | mips_elf_count_got_entry (struct bfd_link_info *info, |
| 3366 | struct mips_got_info *g, |
| 3367 | struct mips_got_entry *entry) |
| 3368 | { |
| 3369 | if (entry->tls_type) |
| 3370 | { |
| 3371 | g->tls_gotno += mips_tls_got_entries (entry->tls_type); |
| 3372 | g->relocs += mips_tls_got_relocs (info, entry->tls_type, |
| 3373 | entry->symndx < 0 |
| 3374 | ? &entry->d.h->root : NULL); |
| 3375 | } |
| 3376 | else if (entry->symndx >= 0 || entry->d.h->global_got_area == GGA_NONE) |
| 3377 | g->local_gotno += 1; |
| 3378 | else |
| 3379 | g->global_gotno += 1; |
| 3380 | } |
| 3381 | |
| 3382 | /* Output a simple dynamic relocation into SRELOC. */ |
| 3383 | |
| 3384 | static void |
| 3385 | mips_elf_output_dynamic_relocation (bfd *output_bfd, |
| 3386 | asection *sreloc, |
| 3387 | unsigned long reloc_index, |
| 3388 | unsigned long indx, |
| 3389 | int r_type, |
| 3390 | bfd_vma offset) |
| 3391 | { |
| 3392 | Elf_Internal_Rela rel[3]; |
| 3393 | |
| 3394 | memset (rel, 0, sizeof (rel)); |
| 3395 | |
| 3396 | rel[0].r_info = ELF_R_INFO (output_bfd, indx, r_type); |
| 3397 | rel[0].r_offset = rel[1].r_offset = rel[2].r_offset = offset; |
| 3398 | |
| 3399 | if (ABI_64_P (output_bfd)) |
| 3400 | { |
| 3401 | (*get_elf_backend_data (output_bfd)->s->swap_reloc_out) |
| 3402 | (output_bfd, &rel[0], |
| 3403 | (sreloc->contents |
| 3404 | + reloc_index * sizeof (Elf64_Mips_External_Rel))); |
| 3405 | } |
| 3406 | else |
| 3407 | bfd_elf32_swap_reloc_out |
| 3408 | (output_bfd, &rel[0], |
| 3409 | (sreloc->contents |
| 3410 | + reloc_index * sizeof (Elf32_External_Rel))); |
| 3411 | } |
| 3412 | |
| 3413 | /* Initialize a set of TLS GOT entries for one symbol. */ |
| 3414 | |
| 3415 | static void |
| 3416 | mips_elf_initialize_tls_slots (bfd *abfd, struct bfd_link_info *info, |
| 3417 | struct mips_got_entry *entry, |
| 3418 | struct mips_elf_link_hash_entry *h, |
| 3419 | bfd_vma value) |
| 3420 | { |
| 3421 | bfd_boolean dyn = elf_hash_table (info)->dynamic_sections_created; |
| 3422 | struct mips_elf_link_hash_table *htab; |
| 3423 | int indx; |
| 3424 | asection *sreloc, *sgot; |
| 3425 | bfd_vma got_offset, got_offset2; |
| 3426 | bfd_boolean need_relocs = FALSE; |
| 3427 | |
| 3428 | htab = mips_elf_hash_table (info); |
| 3429 | if (htab == NULL) |
| 3430 | return; |
| 3431 | |
| 3432 | sgot = htab->root.sgot; |
| 3433 | |
| 3434 | indx = 0; |
| 3435 | if (h != NULL |
| 3436 | && h->root.dynindx != -1 |
| 3437 | && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), &h->root) |
| 3438 | && (bfd_link_dll (info) || !SYMBOL_REFERENCES_LOCAL (info, &h->root))) |
| 3439 | indx = h->root.dynindx; |
| 3440 | |
| 3441 | if (entry->tls_initialized) |
| 3442 | return; |
| 3443 | |
| 3444 | if ((bfd_link_dll (info) || indx != 0) |
| 3445 | && (h == NULL |
| 3446 | || ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT |
| 3447 | || h->root.type != bfd_link_hash_undefweak)) |
| 3448 | need_relocs = TRUE; |
| 3449 | |
| 3450 | /* MINUS_ONE means the symbol is not defined in this object. It may not |
| 3451 | be defined at all; assume that the value doesn't matter in that |
| 3452 | case. Otherwise complain if we would use the value. */ |
| 3453 | BFD_ASSERT (value != MINUS_ONE || (indx != 0 && need_relocs) |
| 3454 | || h->root.root.type == bfd_link_hash_undefweak); |
| 3455 | |
| 3456 | /* Emit necessary relocations. */ |
| 3457 | sreloc = mips_elf_rel_dyn_section (info, FALSE); |
| 3458 | got_offset = entry->gotidx; |
| 3459 | |
| 3460 | switch (entry->tls_type) |
| 3461 | { |
| 3462 | case GOT_TLS_GD: |
| 3463 | /* General Dynamic. */ |
| 3464 | got_offset2 = got_offset + MIPS_ELF_GOT_SIZE (abfd); |
| 3465 | |
| 3466 | if (need_relocs) |
| 3467 | { |
| 3468 | mips_elf_output_dynamic_relocation |
| 3469 | (abfd, sreloc, sreloc->reloc_count++, indx, |
| 3470 | ABI_64_P (abfd) ? R_MIPS_TLS_DTPMOD64 : R_MIPS_TLS_DTPMOD32, |
| 3471 | sgot->output_offset + sgot->output_section->vma + got_offset); |
| 3472 | |
| 3473 | if (indx) |
| 3474 | mips_elf_output_dynamic_relocation |
| 3475 | (abfd, sreloc, sreloc->reloc_count++, indx, |
| 3476 | ABI_64_P (abfd) ? R_MIPS_TLS_DTPREL64 : R_MIPS_TLS_DTPREL32, |
| 3477 | sgot->output_offset + sgot->output_section->vma + got_offset2); |
| 3478 | else |
| 3479 | MIPS_ELF_PUT_WORD (abfd, value - dtprel_base (info), |
| 3480 | sgot->contents + got_offset2); |
| 3481 | } |
| 3482 | else |
| 3483 | { |
| 3484 | MIPS_ELF_PUT_WORD (abfd, 1, |
| 3485 | sgot->contents + got_offset); |
| 3486 | MIPS_ELF_PUT_WORD (abfd, value - dtprel_base (info), |
| 3487 | sgot->contents + got_offset2); |
| 3488 | } |
| 3489 | break; |
| 3490 | |
| 3491 | case GOT_TLS_IE: |
| 3492 | /* Initial Exec model. */ |
| 3493 | if (need_relocs) |
| 3494 | { |
| 3495 | if (indx == 0) |
| 3496 | MIPS_ELF_PUT_WORD (abfd, value - elf_hash_table (info)->tls_sec->vma, |
| 3497 | sgot->contents + got_offset); |
| 3498 | else |
| 3499 | MIPS_ELF_PUT_WORD (abfd, 0, |
| 3500 | sgot->contents + got_offset); |
| 3501 | |
| 3502 | mips_elf_output_dynamic_relocation |
| 3503 | (abfd, sreloc, sreloc->reloc_count++, indx, |
| 3504 | ABI_64_P (abfd) ? R_MIPS_TLS_TPREL64 : R_MIPS_TLS_TPREL32, |
| 3505 | sgot->output_offset + sgot->output_section->vma + got_offset); |
| 3506 | } |
| 3507 | else |
| 3508 | MIPS_ELF_PUT_WORD (abfd, value - tprel_base (info), |
| 3509 | sgot->contents + got_offset); |
| 3510 | break; |
| 3511 | |
| 3512 | case GOT_TLS_LDM: |
| 3513 | /* The initial offset is zero, and the LD offsets will include the |
| 3514 | bias by DTP_OFFSET. */ |
| 3515 | MIPS_ELF_PUT_WORD (abfd, 0, |
| 3516 | sgot->contents + got_offset |
| 3517 | + MIPS_ELF_GOT_SIZE (abfd)); |
| 3518 | |
| 3519 | if (!bfd_link_dll (info)) |
| 3520 | MIPS_ELF_PUT_WORD (abfd, 1, |
| 3521 | sgot->contents + got_offset); |
| 3522 | else |
| 3523 | mips_elf_output_dynamic_relocation |
| 3524 | (abfd, sreloc, sreloc->reloc_count++, indx, |
| 3525 | ABI_64_P (abfd) ? R_MIPS_TLS_DTPMOD64 : R_MIPS_TLS_DTPMOD32, |
| 3526 | sgot->output_offset + sgot->output_section->vma + got_offset); |
| 3527 | break; |
| 3528 | |
| 3529 | default: |
| 3530 | abort (); |
| 3531 | } |
| 3532 | |
| 3533 | entry->tls_initialized = TRUE; |
| 3534 | } |
| 3535 | |
| 3536 | /* Return the offset from _GLOBAL_OFFSET_TABLE_ of the .got.plt entry |
| 3537 | for global symbol H. .got.plt comes before the GOT, so the offset |
| 3538 | will be negative. */ |
| 3539 | |
| 3540 | static bfd_vma |
| 3541 | mips_elf_gotplt_index (struct bfd_link_info *info, |
| 3542 | struct elf_link_hash_entry *h) |
| 3543 | { |
| 3544 | bfd_vma got_address, got_value; |
| 3545 | struct mips_elf_link_hash_table *htab; |
| 3546 | |
| 3547 | htab = mips_elf_hash_table (info); |
| 3548 | BFD_ASSERT (htab != NULL); |
| 3549 | |
| 3550 | BFD_ASSERT (h->plt.plist != NULL); |
| 3551 | BFD_ASSERT (h->plt.plist->gotplt_index != MINUS_ONE); |
| 3552 | |
| 3553 | /* Calculate the address of the associated .got.plt entry. */ |
| 3554 | got_address = (htab->root.sgotplt->output_section->vma |
| 3555 | + htab->root.sgotplt->output_offset |
| 3556 | + (h->plt.plist->gotplt_index |
| 3557 | * MIPS_ELF_GOT_SIZE (info->output_bfd))); |
| 3558 | |
| 3559 | /* Calculate the value of _GLOBAL_OFFSET_TABLE_. */ |
| 3560 | got_value = (htab->root.hgot->root.u.def.section->output_section->vma |
| 3561 | + htab->root.hgot->root.u.def.section->output_offset |
| 3562 | + htab->root.hgot->root.u.def.value); |
| 3563 | |
| 3564 | return got_address - got_value; |
| 3565 | } |
| 3566 | |
| 3567 | /* Return the GOT offset for address VALUE. If there is not yet a GOT |
| 3568 | entry for this value, create one. If R_SYMNDX refers to a TLS symbol, |
| 3569 | create a TLS GOT entry instead. Return -1 if no satisfactory GOT |
| 3570 | offset can be found. */ |
| 3571 | |
| 3572 | static bfd_vma |
| 3573 | mips_elf_local_got_index (bfd *abfd, bfd *ibfd, struct bfd_link_info *info, |
| 3574 | bfd_vma value, unsigned long r_symndx, |
| 3575 | struct mips_elf_link_hash_entry *h, int r_type) |
| 3576 | { |
| 3577 | struct mips_elf_link_hash_table *htab; |
| 3578 | struct mips_got_entry *entry; |
| 3579 | |
| 3580 | htab = mips_elf_hash_table (info); |
| 3581 | BFD_ASSERT (htab != NULL); |
| 3582 | |
| 3583 | entry = mips_elf_create_local_got_entry (abfd, info, ibfd, value, |
| 3584 | r_symndx, h, r_type); |
| 3585 | if (!entry) |
| 3586 | return MINUS_ONE; |
| 3587 | |
| 3588 | if (entry->tls_type) |
| 3589 | mips_elf_initialize_tls_slots (abfd, info, entry, h, value); |
| 3590 | return entry->gotidx; |
| 3591 | } |
| 3592 | |
| 3593 | /* Return the GOT index of global symbol H in the primary GOT. */ |
| 3594 | |
| 3595 | static bfd_vma |
| 3596 | mips_elf_primary_global_got_index (bfd *obfd, struct bfd_link_info *info, |
| 3597 | struct elf_link_hash_entry *h) |
| 3598 | { |
| 3599 | struct mips_elf_link_hash_table *htab; |
| 3600 | long global_got_dynindx; |
| 3601 | struct mips_got_info *g; |
| 3602 | bfd_vma got_index; |
| 3603 | |
| 3604 | htab = mips_elf_hash_table (info); |
| 3605 | BFD_ASSERT (htab != NULL); |
| 3606 | |
| 3607 | global_got_dynindx = 0; |
| 3608 | if (htab->global_gotsym != NULL) |
| 3609 | global_got_dynindx = htab->global_gotsym->dynindx; |
| 3610 | |
| 3611 | /* Once we determine the global GOT entry with the lowest dynamic |
| 3612 | symbol table index, we must put all dynamic symbols with greater |
| 3613 | indices into the primary GOT. That makes it easy to calculate the |
| 3614 | GOT offset. */ |
| 3615 | BFD_ASSERT (h->dynindx >= global_got_dynindx); |
| 3616 | g = mips_elf_bfd_got (obfd, FALSE); |
| 3617 | got_index = ((h->dynindx - global_got_dynindx + g->local_gotno) |
| 3618 | * MIPS_ELF_GOT_SIZE (obfd)); |
| 3619 | BFD_ASSERT (got_index < htab->root.sgot->size); |
| 3620 | |
| 3621 | return got_index; |
| 3622 | } |
| 3623 | |
| 3624 | /* Return the GOT index for the global symbol indicated by H, which is |
| 3625 | referenced by a relocation of type R_TYPE in IBFD. */ |
| 3626 | |
| 3627 | static bfd_vma |
| 3628 | mips_elf_global_got_index (bfd *obfd, struct bfd_link_info *info, bfd *ibfd, |
| 3629 | struct elf_link_hash_entry *h, int r_type) |
| 3630 | { |
| 3631 | struct mips_elf_link_hash_table *htab; |
| 3632 | struct mips_got_info *g; |
| 3633 | struct mips_got_entry lookup, *entry; |
| 3634 | bfd_vma gotidx; |
| 3635 | |
| 3636 | htab = mips_elf_hash_table (info); |
| 3637 | BFD_ASSERT (htab != NULL); |
| 3638 | |
| 3639 | g = mips_elf_bfd_got (ibfd, FALSE); |
| 3640 | BFD_ASSERT (g); |
| 3641 | |
| 3642 | lookup.tls_type = mips_elf_reloc_tls_type (r_type); |
| 3643 | if (!lookup.tls_type && g == mips_elf_bfd_got (obfd, FALSE)) |
| 3644 | return mips_elf_primary_global_got_index (obfd, info, h); |
| 3645 | |
| 3646 | lookup.abfd = ibfd; |
| 3647 | lookup.symndx = -1; |
| 3648 | lookup.d.h = (struct mips_elf_link_hash_entry *) h; |
| 3649 | entry = htab_find (g->got_entries, &lookup); |
| 3650 | BFD_ASSERT (entry); |
| 3651 | |
| 3652 | gotidx = entry->gotidx; |
| 3653 | BFD_ASSERT (gotidx > 0 && gotidx < htab->root.sgot->size); |
| 3654 | |
| 3655 | if (lookup.tls_type) |
| 3656 | { |
| 3657 | bfd_vma value = MINUS_ONE; |
| 3658 | |
| 3659 | if ((h->root.type == bfd_link_hash_defined |
| 3660 | || h->root.type == bfd_link_hash_defweak) |
| 3661 | && h->root.u.def.section->output_section) |
| 3662 | value = (h->root.u.def.value |
| 3663 | + h->root.u.def.section->output_offset |
| 3664 | + h->root.u.def.section->output_section->vma); |
| 3665 | |
| 3666 | mips_elf_initialize_tls_slots (obfd, info, entry, lookup.d.h, value); |
| 3667 | } |
| 3668 | return gotidx; |
| 3669 | } |
| 3670 | |
| 3671 | /* Find a GOT page entry that points to within 32KB of VALUE. These |
| 3672 | entries are supposed to be placed at small offsets in the GOT, i.e., |
| 3673 | within 32KB of GP. Return the index of the GOT entry, or -1 if no |
| 3674 | entry could be created. If OFFSETP is nonnull, use it to return the |
| 3675 | offset of the GOT entry from VALUE. */ |
| 3676 | |
| 3677 | static bfd_vma |
| 3678 | mips_elf_got_page (bfd *abfd, bfd *ibfd, struct bfd_link_info *info, |
| 3679 | bfd_vma value, bfd_vma *offsetp) |
| 3680 | { |
| 3681 | bfd_vma page, got_index; |
| 3682 | struct mips_got_entry *entry; |
| 3683 | |
| 3684 | page = (value + 0x8000) & ~(bfd_vma) 0xffff; |
| 3685 | entry = mips_elf_create_local_got_entry (abfd, info, ibfd, page, 0, |
| 3686 | NULL, R_MIPS_GOT_PAGE); |
| 3687 | |
| 3688 | if (!entry) |
| 3689 | return MINUS_ONE; |
| 3690 | |
| 3691 | got_index = entry->gotidx; |
| 3692 | |
| 3693 | if (offsetp) |
| 3694 | *offsetp = value - entry->d.address; |
| 3695 | |
| 3696 | return got_index; |
| 3697 | } |
| 3698 | |
| 3699 | /* Find a local GOT entry for an R_MIPS*_GOT16 relocation against VALUE. |
| 3700 | EXTERNAL is true if the relocation was originally against a global |
| 3701 | symbol that binds locally. */ |
| 3702 | |
| 3703 | static bfd_vma |
| 3704 | mips_elf_got16_entry (bfd *abfd, bfd *ibfd, struct bfd_link_info *info, |
| 3705 | bfd_vma value, bfd_boolean external) |
| 3706 | { |
| 3707 | struct mips_got_entry *entry; |
| 3708 | |
| 3709 | /* GOT16 relocations against local symbols are followed by a LO16 |
| 3710 | relocation; those against global symbols are not. Thus if the |
| 3711 | symbol was originally local, the GOT16 relocation should load the |
| 3712 | equivalent of %hi(VALUE), otherwise it should load VALUE itself. */ |
| 3713 | if (! external) |
| 3714 | value = mips_elf_high (value) << 16; |
| 3715 | |
| 3716 | /* It doesn't matter whether the original relocation was R_MIPS_GOT16, |
| 3717 | R_MIPS16_GOT16, R_MIPS_CALL16, etc. The format of the entry is the |
| 3718 | same in all cases. */ |
| 3719 | entry = mips_elf_create_local_got_entry (abfd, info, ibfd, value, 0, |
| 3720 | NULL, R_MIPS_GOT16); |
| 3721 | if (entry) |
| 3722 | return entry->gotidx; |
| 3723 | else |
| 3724 | return MINUS_ONE; |
| 3725 | } |
| 3726 | |
| 3727 | /* Returns the offset for the entry at the INDEXth position |
| 3728 | in the GOT. */ |
| 3729 | |
| 3730 | static bfd_vma |
| 3731 | mips_elf_got_offset_from_index (struct bfd_link_info *info, bfd *output_bfd, |
| 3732 | bfd *input_bfd, bfd_vma got_index) |
| 3733 | { |
| 3734 | struct mips_elf_link_hash_table *htab; |
| 3735 | asection *sgot; |
| 3736 | bfd_vma gp; |
| 3737 | |
| 3738 | htab = mips_elf_hash_table (info); |
| 3739 | BFD_ASSERT (htab != NULL); |
| 3740 | |
| 3741 | sgot = htab->root.sgot; |
| 3742 | gp = _bfd_get_gp_value (output_bfd) |
| 3743 | + mips_elf_adjust_gp (output_bfd, htab->got_info, input_bfd); |
| 3744 | |
| 3745 | return sgot->output_section->vma + sgot->output_offset + got_index - gp; |
| 3746 | } |
| 3747 | |
| 3748 | /* Create and return a local GOT entry for VALUE, which was calculated |
| 3749 | from a symbol belonging to INPUT_SECTON. Return NULL if it could not |
| 3750 | be created. If R_SYMNDX refers to a TLS symbol, create a TLS entry |
| 3751 | instead. */ |
| 3752 | |
| 3753 | static struct mips_got_entry * |
| 3754 | mips_elf_create_local_got_entry (bfd *abfd, struct bfd_link_info *info, |
| 3755 | bfd *ibfd, bfd_vma value, |
| 3756 | unsigned long r_symndx, |
| 3757 | struct mips_elf_link_hash_entry *h, |
| 3758 | int r_type) |
| 3759 | { |
| 3760 | struct mips_got_entry lookup, *entry; |
| 3761 | void **loc; |
| 3762 | struct mips_got_info *g; |
| 3763 | struct mips_elf_link_hash_table *htab; |
| 3764 | bfd_vma gotidx; |
| 3765 | |
| 3766 | htab = mips_elf_hash_table (info); |
| 3767 | BFD_ASSERT (htab != NULL); |
| 3768 | |
| 3769 | g = mips_elf_bfd_got (ibfd, FALSE); |
| 3770 | if (g == NULL) |
| 3771 | { |
| 3772 | g = mips_elf_bfd_got (abfd, FALSE); |
| 3773 | BFD_ASSERT (g != NULL); |
| 3774 | } |
| 3775 | |
| 3776 | /* This function shouldn't be called for symbols that live in the global |
| 3777 | area of the GOT. */ |
| 3778 | BFD_ASSERT (h == NULL || h->global_got_area == GGA_NONE); |
| 3779 | |
| 3780 | lookup.tls_type = mips_elf_reloc_tls_type (r_type); |
| 3781 | if (lookup.tls_type) |
| 3782 | { |
| 3783 | lookup.abfd = ibfd; |
| 3784 | if (tls_ldm_reloc_p (r_type)) |
| 3785 | { |
| 3786 | lookup.symndx = 0; |
| 3787 | lookup.d.addend = 0; |
| 3788 | } |
| 3789 | else if (h == NULL) |
| 3790 | { |
| 3791 | lookup.symndx = r_symndx; |
| 3792 | lookup.d.addend = 0; |
| 3793 | } |
| 3794 | else |
| 3795 | { |
| 3796 | lookup.symndx = -1; |
| 3797 | lookup.d.h = h; |
| 3798 | } |
| 3799 | |
| 3800 | entry = (struct mips_got_entry *) htab_find (g->got_entries, &lookup); |
| 3801 | BFD_ASSERT (entry); |
| 3802 | |
| 3803 | gotidx = entry->gotidx; |
| 3804 | BFD_ASSERT (gotidx > 0 && gotidx < htab->root.sgot->size); |
| 3805 | |
| 3806 | return entry; |
| 3807 | } |
| 3808 | |
| 3809 | lookup.abfd = NULL; |
| 3810 | lookup.symndx = -1; |
| 3811 | lookup.d.address = value; |
| 3812 | loc = htab_find_slot (g->got_entries, &lookup, INSERT); |
| 3813 | if (!loc) |
| 3814 | return NULL; |
| 3815 | |
| 3816 | entry = (struct mips_got_entry *) *loc; |
| 3817 | if (entry) |
| 3818 | return entry; |
| 3819 | |
| 3820 | if (g->assigned_low_gotno > g->assigned_high_gotno) |
| 3821 | { |
| 3822 | /* We didn't allocate enough space in the GOT. */ |
| 3823 | _bfd_error_handler |
| 3824 | (_("not enough GOT space for local GOT entries")); |
| 3825 | bfd_set_error (bfd_error_bad_value); |
| 3826 | return NULL; |
| 3827 | } |
| 3828 | |
| 3829 | entry = (struct mips_got_entry *) bfd_alloc (abfd, sizeof (*entry)); |
| 3830 | if (!entry) |
| 3831 | return NULL; |
| 3832 | |
| 3833 | if (got16_reloc_p (r_type) |
| 3834 | || call16_reloc_p (r_type) |
| 3835 | || got_page_reloc_p (r_type) |
| 3836 | || got_disp_reloc_p (r_type)) |
| 3837 | lookup.gotidx = MIPS_ELF_GOT_SIZE (abfd) * g->assigned_low_gotno++; |
| 3838 | else |
| 3839 | lookup.gotidx = MIPS_ELF_GOT_SIZE (abfd) * g->assigned_high_gotno--; |
| 3840 | |
| 3841 | *entry = lookup; |
| 3842 | *loc = entry; |
| 3843 | |
| 3844 | MIPS_ELF_PUT_WORD (abfd, value, htab->root.sgot->contents + entry->gotidx); |
| 3845 | |
| 3846 | /* These GOT entries need a dynamic relocation on VxWorks. */ |
| 3847 | if (htab->is_vxworks) |
| 3848 | { |
| 3849 | Elf_Internal_Rela outrel; |
| 3850 | asection *s; |
| 3851 | bfd_byte *rloc; |
| 3852 | bfd_vma got_address; |
| 3853 | |
| 3854 | s = mips_elf_rel_dyn_section (info, FALSE); |
| 3855 | got_address = (htab->root.sgot->output_section->vma |
| 3856 | + htab->root.sgot->output_offset |
| 3857 | + entry->gotidx); |
| 3858 | |
| 3859 | rloc = s->contents + (s->reloc_count++ * sizeof (Elf32_External_Rela)); |
| 3860 | outrel.r_offset = got_address; |
| 3861 | outrel.r_info = ELF32_R_INFO (STN_UNDEF, R_MIPS_32); |
| 3862 | outrel.r_addend = value; |
| 3863 | bfd_elf32_swap_reloca_out (abfd, &outrel, rloc); |
| 3864 | } |
| 3865 | |
| 3866 | return entry; |
| 3867 | } |
| 3868 | |
| 3869 | /* Return the number of dynamic section symbols required by OUTPUT_BFD. |
| 3870 | The number might be exact or a worst-case estimate, depending on how |
| 3871 | much information is available to elf_backend_omit_section_dynsym at |
| 3872 | the current linking stage. */ |
| 3873 | |
| 3874 | static bfd_size_type |
| 3875 | count_section_dynsyms (bfd *output_bfd, struct bfd_link_info *info) |
| 3876 | { |
| 3877 | bfd_size_type count; |
| 3878 | |
| 3879 | count = 0; |
| 3880 | if (bfd_link_pic (info) |
| 3881 | || elf_hash_table (info)->is_relocatable_executable) |
| 3882 | { |
| 3883 | asection *p; |
| 3884 | const struct elf_backend_data *bed; |
| 3885 | |
| 3886 | bed = get_elf_backend_data (output_bfd); |
| 3887 | for (p = output_bfd->sections; p ; p = p->next) |
| 3888 | if ((p->flags & SEC_EXCLUDE) == 0 |
| 3889 | && (p->flags & SEC_ALLOC) != 0 |
| 3890 | && elf_hash_table (info)->dynamic_relocs |
| 3891 | && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) |
| 3892 | ++count; |
| 3893 | } |
| 3894 | return count; |
| 3895 | } |
| 3896 | |
| 3897 | /* Sort the dynamic symbol table so that symbols that need GOT entries |
| 3898 | appear towards the end. */ |
| 3899 | |
| 3900 | static bfd_boolean |
| 3901 | mips_elf_sort_hash_table (bfd *abfd, struct bfd_link_info *info) |
| 3902 | { |
| 3903 | struct mips_elf_link_hash_table *htab; |
| 3904 | struct mips_elf_hash_sort_data hsd; |
| 3905 | struct mips_got_info *g; |
| 3906 | |
| 3907 | htab = mips_elf_hash_table (info); |
| 3908 | BFD_ASSERT (htab != NULL); |
| 3909 | |
| 3910 | if (htab->root.dynsymcount == 0) |
| 3911 | return TRUE; |
| 3912 | |
| 3913 | g = htab->got_info; |
| 3914 | if (g == NULL) |
| 3915 | return TRUE; |
| 3916 | |
| 3917 | hsd.low = NULL; |
| 3918 | hsd.max_unref_got_dynindx |
| 3919 | = hsd.min_got_dynindx |
| 3920 | = (htab->root.dynsymcount - g->reloc_only_gotno); |
| 3921 | /* Add 1 to local symbol indices to account for the mandatory NULL entry |
| 3922 | at the head of the table; see `_bfd_elf_link_renumber_dynsyms'. */ |
| 3923 | hsd.max_local_dynindx = count_section_dynsyms (abfd, info) + 1; |
| 3924 | hsd.max_non_got_dynindx = htab->root.local_dynsymcount + 1; |
| 3925 | hsd.output_bfd = abfd; |
| 3926 | if (htab->root.dynobj != NULL |
| 3927 | && htab->root.dynamic_sections_created |
| 3928 | && info->emit_gnu_hash) |
| 3929 | { |
| 3930 | asection *s = bfd_get_linker_section (htab->root.dynobj, ".MIPS.xhash"); |
| 3931 | BFD_ASSERT (s != NULL); |
| 3932 | hsd.mipsxhash = s->contents; |
| 3933 | BFD_ASSERT (hsd.mipsxhash != NULL); |
| 3934 | } |
| 3935 | else |
| 3936 | hsd.mipsxhash = NULL; |
| 3937 | mips_elf_link_hash_traverse (htab, mips_elf_sort_hash_table_f, &hsd); |
| 3938 | |
| 3939 | /* There should have been enough room in the symbol table to |
| 3940 | accommodate both the GOT and non-GOT symbols. */ |
| 3941 | BFD_ASSERT (hsd.max_local_dynindx <= htab->root.local_dynsymcount + 1); |
| 3942 | BFD_ASSERT (hsd.max_non_got_dynindx <= hsd.min_got_dynindx); |
| 3943 | BFD_ASSERT (hsd.max_unref_got_dynindx == htab->root.dynsymcount); |
| 3944 | BFD_ASSERT (htab->root.dynsymcount - hsd.min_got_dynindx == g->global_gotno); |
| 3945 | |
| 3946 | /* Now we know which dynamic symbol has the lowest dynamic symbol |
| 3947 | table index in the GOT. */ |
| 3948 | htab->global_gotsym = hsd.low; |
| 3949 | |
| 3950 | return TRUE; |
| 3951 | } |
| 3952 | |
| 3953 | /* If H needs a GOT entry, assign it the highest available dynamic |
| 3954 | index. Otherwise, assign it the lowest available dynamic |
| 3955 | index. */ |
| 3956 | |
| 3957 | static bfd_boolean |
| 3958 | mips_elf_sort_hash_table_f (struct mips_elf_link_hash_entry *h, void *data) |
| 3959 | { |
| 3960 | struct mips_elf_hash_sort_data *hsd = data; |
| 3961 | |
| 3962 | /* Symbols without dynamic symbol table entries aren't interesting |
| 3963 | at all. */ |
| 3964 | if (h->root.dynindx == -1) |
| 3965 | return TRUE; |
| 3966 | |
| 3967 | switch (h->global_got_area) |
| 3968 | { |
| 3969 | case GGA_NONE: |
| 3970 | if (h->root.forced_local) |
| 3971 | h->root.dynindx = hsd->max_local_dynindx++; |
| 3972 | else |
| 3973 | h->root.dynindx = hsd->max_non_got_dynindx++; |
| 3974 | break; |
| 3975 | |
| 3976 | case GGA_NORMAL: |
| 3977 | h->root.dynindx = --hsd->min_got_dynindx; |
| 3978 | hsd->low = (struct elf_link_hash_entry *) h; |
| 3979 | break; |
| 3980 | |
| 3981 | case GGA_RELOC_ONLY: |
| 3982 | if (hsd->max_unref_got_dynindx == hsd->min_got_dynindx) |
| 3983 | hsd->low = (struct elf_link_hash_entry *) h; |
| 3984 | h->root.dynindx = hsd->max_unref_got_dynindx++; |
| 3985 | break; |
| 3986 | } |
| 3987 | |
| 3988 | /* Populate the .MIPS.xhash translation table entry with |
| 3989 | the symbol dynindx. */ |
| 3990 | if (h->mipsxhash_loc != 0 && hsd->mipsxhash != NULL) |
| 3991 | bfd_put_32 (hsd->output_bfd, h->root.dynindx, |
| 3992 | hsd->mipsxhash + h->mipsxhash_loc); |
| 3993 | |
| 3994 | return TRUE; |
| 3995 | } |
| 3996 | |
| 3997 | /* Record that input bfd ABFD requires a GOT entry like *LOOKUP |
| 3998 | (which is owned by the caller and shouldn't be added to the |
| 3999 | hash table directly). */ |
| 4000 | |
| 4001 | static bfd_boolean |
| 4002 | mips_elf_record_got_entry (struct bfd_link_info *info, bfd *abfd, |
| 4003 | struct mips_got_entry *lookup) |
| 4004 | { |
| 4005 | struct mips_elf_link_hash_table *htab; |
| 4006 | struct mips_got_entry *entry; |
| 4007 | struct mips_got_info *g; |
| 4008 | void **loc, **bfd_loc; |
| 4009 | |
| 4010 | /* Make sure there's a slot for this entry in the master GOT. */ |
| 4011 | htab = mips_elf_hash_table (info); |
| 4012 | g = htab->got_info; |
| 4013 | loc = htab_find_slot (g->got_entries, lookup, INSERT); |
| 4014 | if (!loc) |
| 4015 | return FALSE; |
| 4016 | |
| 4017 | /* Populate the entry if it isn't already. */ |
| 4018 | entry = (struct mips_got_entry *) *loc; |
| 4019 | if (!entry) |
| 4020 | { |
| 4021 | entry = (struct mips_got_entry *) bfd_alloc (abfd, sizeof (*entry)); |
| 4022 | if (!entry) |
| 4023 | return FALSE; |
| 4024 | |
| 4025 | lookup->tls_initialized = FALSE; |
| 4026 | lookup->gotidx = -1; |
| 4027 | *entry = *lookup; |
| 4028 | *loc = entry; |
| 4029 | } |
| 4030 | |
| 4031 | /* Reuse the same GOT entry for the BFD's GOT. */ |
| 4032 | g = mips_elf_bfd_got (abfd, TRUE); |
| 4033 | if (!g) |
| 4034 | return FALSE; |
| 4035 | |
| 4036 | bfd_loc = htab_find_slot (g->got_entries, lookup, INSERT); |
| 4037 | if (!bfd_loc) |
| 4038 | return FALSE; |
| 4039 | |
| 4040 | if (!*bfd_loc) |
| 4041 | *bfd_loc = entry; |
| 4042 | return TRUE; |
| 4043 | } |
| 4044 | |
| 4045 | /* ABFD has a GOT relocation of type R_TYPE against H. Reserve a GOT |
| 4046 | entry for it. FOR_CALL is true if the caller is only interested in |
| 4047 | using the GOT entry for calls. */ |
| 4048 | |
| 4049 | static bfd_boolean |
| 4050 | mips_elf_record_global_got_symbol (struct elf_link_hash_entry *h, |
| 4051 | bfd *abfd, struct bfd_link_info *info, |
| 4052 | bfd_boolean for_call, int r_type) |
| 4053 | { |
| 4054 | struct mips_elf_link_hash_table *htab; |
| 4055 | struct mips_elf_link_hash_entry *hmips; |
| 4056 | struct mips_got_entry entry; |
| 4057 | unsigned char tls_type; |
| 4058 | |
| 4059 | htab = mips_elf_hash_table (info); |
| 4060 | BFD_ASSERT (htab != NULL); |
| 4061 | |
| 4062 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 4063 | if (!for_call) |
| 4064 | hmips->got_only_for_calls = FALSE; |
| 4065 | |
| 4066 | /* A global symbol in the GOT must also be in the dynamic symbol |
| 4067 | table. */ |
| 4068 | if (h->dynindx == -1) |
| 4069 | { |
| 4070 | switch (ELF_ST_VISIBILITY (h->other)) |
| 4071 | { |
| 4072 | case STV_INTERNAL: |
| 4073 | case STV_HIDDEN: |
| 4074 | _bfd_mips_elf_hide_symbol (info, h, TRUE); |
| 4075 | break; |
| 4076 | } |
| 4077 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 4078 | return FALSE; |
| 4079 | } |
| 4080 | |
| 4081 | tls_type = mips_elf_reloc_tls_type (r_type); |
| 4082 | if (tls_type == GOT_TLS_NONE && hmips->global_got_area > GGA_NORMAL) |
| 4083 | hmips->global_got_area = GGA_NORMAL; |
| 4084 | |
| 4085 | entry.abfd = abfd; |
| 4086 | entry.symndx = -1; |
| 4087 | entry.d.h = (struct mips_elf_link_hash_entry *) h; |
| 4088 | entry.tls_type = tls_type; |
| 4089 | return mips_elf_record_got_entry (info, abfd, &entry); |
| 4090 | } |
| 4091 | |
| 4092 | /* ABFD has a GOT relocation of type R_TYPE against symbol SYMNDX + ADDEND, |
| 4093 | where SYMNDX is a local symbol. Reserve a GOT entry for it. */ |
| 4094 | |
| 4095 | static bfd_boolean |
| 4096 | mips_elf_record_local_got_symbol (bfd *abfd, long symndx, bfd_vma addend, |
| 4097 | struct bfd_link_info *info, int r_type) |
| 4098 | { |
| 4099 | struct mips_elf_link_hash_table *htab; |
| 4100 | struct mips_got_info *g; |
| 4101 | struct mips_got_entry entry; |
| 4102 | |
| 4103 | htab = mips_elf_hash_table (info); |
| 4104 | BFD_ASSERT (htab != NULL); |
| 4105 | |
| 4106 | g = htab->got_info; |
| 4107 | BFD_ASSERT (g != NULL); |
| 4108 | |
| 4109 | entry.abfd = abfd; |
| 4110 | entry.symndx = symndx; |
| 4111 | entry.d.addend = addend; |
| 4112 | entry.tls_type = mips_elf_reloc_tls_type (r_type); |
| 4113 | return mips_elf_record_got_entry (info, abfd, &entry); |
| 4114 | } |
| 4115 | |
| 4116 | /* Record that ABFD has a page relocation against SYMNDX + ADDEND. |
| 4117 | H is the symbol's hash table entry, or null if SYMNDX is local |
| 4118 | to ABFD. */ |
| 4119 | |
| 4120 | static bfd_boolean |
| 4121 | mips_elf_record_got_page_ref (struct bfd_link_info *info, bfd *abfd, |
| 4122 | long symndx, struct elf_link_hash_entry *h, |
| 4123 | bfd_signed_vma addend) |
| 4124 | { |
| 4125 | struct mips_elf_link_hash_table *htab; |
| 4126 | struct mips_got_info *g1, *g2; |
| 4127 | struct mips_got_page_ref lookup, *entry; |
| 4128 | void **loc, **bfd_loc; |
| 4129 | |
| 4130 | htab = mips_elf_hash_table (info); |
| 4131 | BFD_ASSERT (htab != NULL); |
| 4132 | |
| 4133 | g1 = htab->got_info; |
| 4134 | BFD_ASSERT (g1 != NULL); |
| 4135 | |
| 4136 | if (h) |
| 4137 | { |
| 4138 | lookup.symndx = -1; |
| 4139 | lookup.u.h = (struct mips_elf_link_hash_entry *) h; |
| 4140 | } |
| 4141 | else |
| 4142 | { |
| 4143 | lookup.symndx = symndx; |
| 4144 | lookup.u.abfd = abfd; |
| 4145 | } |
| 4146 | lookup.addend = addend; |
| 4147 | loc = htab_find_slot (g1->got_page_refs, &lookup, INSERT); |
| 4148 | if (loc == NULL) |
| 4149 | return FALSE; |
| 4150 | |
| 4151 | entry = (struct mips_got_page_ref *) *loc; |
| 4152 | if (!entry) |
| 4153 | { |
| 4154 | entry = bfd_alloc (abfd, sizeof (*entry)); |
| 4155 | if (!entry) |
| 4156 | return FALSE; |
| 4157 | |
| 4158 | *entry = lookup; |
| 4159 | *loc = entry; |
| 4160 | } |
| 4161 | |
| 4162 | /* Add the same entry to the BFD's GOT. */ |
| 4163 | g2 = mips_elf_bfd_got (abfd, TRUE); |
| 4164 | if (!g2) |
| 4165 | return FALSE; |
| 4166 | |
| 4167 | bfd_loc = htab_find_slot (g2->got_page_refs, &lookup, INSERT); |
| 4168 | if (!bfd_loc) |
| 4169 | return FALSE; |
| 4170 | |
| 4171 | if (!*bfd_loc) |
| 4172 | *bfd_loc = entry; |
| 4173 | |
| 4174 | return TRUE; |
| 4175 | } |
| 4176 | |
| 4177 | /* Add room for N relocations to the .rel(a).dyn section in ABFD. */ |
| 4178 | |
| 4179 | static void |
| 4180 | mips_elf_allocate_dynamic_relocations (bfd *abfd, struct bfd_link_info *info, |
| 4181 | unsigned int n) |
| 4182 | { |
| 4183 | asection *s; |
| 4184 | struct mips_elf_link_hash_table *htab; |
| 4185 | |
| 4186 | htab = mips_elf_hash_table (info); |
| 4187 | BFD_ASSERT (htab != NULL); |
| 4188 | |
| 4189 | s = mips_elf_rel_dyn_section (info, FALSE); |
| 4190 | BFD_ASSERT (s != NULL); |
| 4191 | |
| 4192 | if (htab->is_vxworks) |
| 4193 | s->size += n * MIPS_ELF_RELA_SIZE (abfd); |
| 4194 | else |
| 4195 | { |
| 4196 | if (s->size == 0) |
| 4197 | { |
| 4198 | /* Make room for a null element. */ |
| 4199 | s->size += MIPS_ELF_REL_SIZE (abfd); |
| 4200 | ++s->reloc_count; |
| 4201 | } |
| 4202 | s->size += n * MIPS_ELF_REL_SIZE (abfd); |
| 4203 | } |
| 4204 | } |
| 4205 | \f |
| 4206 | /* A htab_traverse callback for GOT entries, with DATA pointing to a |
| 4207 | mips_elf_traverse_got_arg structure. Count the number of GOT |
| 4208 | entries and TLS relocs. Set DATA->value to true if we need |
| 4209 | to resolve indirect or warning symbols and then recreate the GOT. */ |
| 4210 | |
| 4211 | static int |
| 4212 | mips_elf_check_recreate_got (void **entryp, void *data) |
| 4213 | { |
| 4214 | struct mips_got_entry *entry; |
| 4215 | struct mips_elf_traverse_got_arg *arg; |
| 4216 | |
| 4217 | entry = (struct mips_got_entry *) *entryp; |
| 4218 | arg = (struct mips_elf_traverse_got_arg *) data; |
| 4219 | if (entry->abfd != NULL && entry->symndx == -1) |
| 4220 | { |
| 4221 | struct mips_elf_link_hash_entry *h; |
| 4222 | |
| 4223 | h = entry->d.h; |
| 4224 | if (h->root.root.type == bfd_link_hash_indirect |
| 4225 | || h->root.root.type == bfd_link_hash_warning) |
| 4226 | { |
| 4227 | arg->value = TRUE; |
| 4228 | return 0; |
| 4229 | } |
| 4230 | } |
| 4231 | mips_elf_count_got_entry (arg->info, arg->g, entry); |
| 4232 | return 1; |
| 4233 | } |
| 4234 | |
| 4235 | /* A htab_traverse callback for GOT entries, with DATA pointing to a |
| 4236 | mips_elf_traverse_got_arg structure. Add all entries to DATA->g, |
| 4237 | converting entries for indirect and warning symbols into entries |
| 4238 | for the target symbol. Set DATA->g to null on error. */ |
| 4239 | |
| 4240 | static int |
| 4241 | mips_elf_recreate_got (void **entryp, void *data) |
| 4242 | { |
| 4243 | struct mips_got_entry new_entry, *entry; |
| 4244 | struct mips_elf_traverse_got_arg *arg; |
| 4245 | void **slot; |
| 4246 | |
| 4247 | entry = (struct mips_got_entry *) *entryp; |
| 4248 | arg = (struct mips_elf_traverse_got_arg *) data; |
| 4249 | if (entry->abfd != NULL |
| 4250 | && entry->symndx == -1 |
| 4251 | && (entry->d.h->root.root.type == bfd_link_hash_indirect |
| 4252 | || entry->d.h->root.root.type == bfd_link_hash_warning)) |
| 4253 | { |
| 4254 | struct mips_elf_link_hash_entry *h; |
| 4255 | |
| 4256 | new_entry = *entry; |
| 4257 | entry = &new_entry; |
| 4258 | h = entry->d.h; |
| 4259 | do |
| 4260 | { |
| 4261 | BFD_ASSERT (h->global_got_area == GGA_NONE); |
| 4262 | h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link; |
| 4263 | } |
| 4264 | while (h->root.root.type == bfd_link_hash_indirect |
| 4265 | || h->root.root.type == bfd_link_hash_warning); |
| 4266 | entry->d.h = h; |
| 4267 | } |
| 4268 | slot = htab_find_slot (arg->g->got_entries, entry, INSERT); |
| 4269 | if (slot == NULL) |
| 4270 | { |
| 4271 | arg->g = NULL; |
| 4272 | return 0; |
| 4273 | } |
| 4274 | if (*slot == NULL) |
| 4275 | { |
| 4276 | if (entry == &new_entry) |
| 4277 | { |
| 4278 | entry = bfd_alloc (entry->abfd, sizeof (*entry)); |
| 4279 | if (!entry) |
| 4280 | { |
| 4281 | arg->g = NULL; |
| 4282 | return 0; |
| 4283 | } |
| 4284 | *entry = new_entry; |
| 4285 | } |
| 4286 | *slot = entry; |
| 4287 | mips_elf_count_got_entry (arg->info, arg->g, entry); |
| 4288 | } |
| 4289 | return 1; |
| 4290 | } |
| 4291 | |
| 4292 | /* Return the maximum number of GOT page entries required for RANGE. */ |
| 4293 | |
| 4294 | static bfd_vma |
| 4295 | mips_elf_pages_for_range (const struct mips_got_page_range *range) |
| 4296 | { |
| 4297 | return (range->max_addend - range->min_addend + 0x1ffff) >> 16; |
| 4298 | } |
| 4299 | |
| 4300 | /* Record that G requires a page entry that can reach SEC + ADDEND. */ |
| 4301 | |
| 4302 | static bfd_boolean |
| 4303 | mips_elf_record_got_page_entry (struct mips_elf_traverse_got_arg *arg, |
| 4304 | asection *sec, bfd_signed_vma addend) |
| 4305 | { |
| 4306 | struct mips_got_info *g = arg->g; |
| 4307 | struct mips_got_page_entry lookup, *entry; |
| 4308 | struct mips_got_page_range **range_ptr, *range; |
| 4309 | bfd_vma old_pages, new_pages; |
| 4310 | void **loc; |
| 4311 | |
| 4312 | /* Find the mips_got_page_entry hash table entry for this section. */ |
| 4313 | lookup.sec = sec; |
| 4314 | loc = htab_find_slot (g->got_page_entries, &lookup, INSERT); |
| 4315 | if (loc == NULL) |
| 4316 | return FALSE; |
| 4317 | |
| 4318 | /* Create a mips_got_page_entry if this is the first time we've |
| 4319 | seen the section. */ |
| 4320 | entry = (struct mips_got_page_entry *) *loc; |
| 4321 | if (!entry) |
| 4322 | { |
| 4323 | entry = bfd_zalloc (arg->info->output_bfd, sizeof (*entry)); |
| 4324 | if (!entry) |
| 4325 | return FALSE; |
| 4326 | |
| 4327 | entry->sec = sec; |
| 4328 | *loc = entry; |
| 4329 | } |
| 4330 | |
| 4331 | /* Skip over ranges whose maximum extent cannot share a page entry |
| 4332 | with ADDEND. */ |
| 4333 | range_ptr = &entry->ranges; |
| 4334 | while (*range_ptr && addend > (*range_ptr)->max_addend + 0xffff) |
| 4335 | range_ptr = &(*range_ptr)->next; |
| 4336 | |
| 4337 | /* If we scanned to the end of the list, or found a range whose |
| 4338 | minimum extent cannot share a page entry with ADDEND, create |
| 4339 | a new singleton range. */ |
| 4340 | range = *range_ptr; |
| 4341 | if (!range || addend < range->min_addend - 0xffff) |
| 4342 | { |
| 4343 | range = bfd_zalloc (arg->info->output_bfd, sizeof (*range)); |
| 4344 | if (!range) |
| 4345 | return FALSE; |
| 4346 | |
| 4347 | range->next = *range_ptr; |
| 4348 | range->min_addend = addend; |
| 4349 | range->max_addend = addend; |
| 4350 | |
| 4351 | *range_ptr = range; |
| 4352 | entry->num_pages++; |
| 4353 | g->page_gotno++; |
| 4354 | return TRUE; |
| 4355 | } |
| 4356 | |
| 4357 | /* Remember how many pages the old range contributed. */ |
| 4358 | old_pages = mips_elf_pages_for_range (range); |
| 4359 | |
| 4360 | /* Update the ranges. */ |
| 4361 | if (addend < range->min_addend) |
| 4362 | range->min_addend = addend; |
| 4363 | else if (addend > range->max_addend) |
| 4364 | { |
| 4365 | if (range->next && addend >= range->next->min_addend - 0xffff) |
| 4366 | { |
| 4367 | old_pages += mips_elf_pages_for_range (range->next); |
| 4368 | range->max_addend = range->next->max_addend; |
| 4369 | range->next = range->next->next; |
| 4370 | } |
| 4371 | else |
| 4372 | range->max_addend = addend; |
| 4373 | } |
| 4374 | |
| 4375 | /* Record any change in the total estimate. */ |
| 4376 | new_pages = mips_elf_pages_for_range (range); |
| 4377 | if (old_pages != new_pages) |
| 4378 | { |
| 4379 | entry->num_pages += new_pages - old_pages; |
| 4380 | g->page_gotno += new_pages - old_pages; |
| 4381 | } |
| 4382 | |
| 4383 | return TRUE; |
| 4384 | } |
| 4385 | |
| 4386 | /* A htab_traverse callback for which *REFP points to a mips_got_page_ref |
| 4387 | and for which DATA points to a mips_elf_traverse_got_arg. Work out |
| 4388 | whether the page reference described by *REFP needs a GOT page entry, |
| 4389 | and record that entry in DATA->g if so. Set DATA->g to null on failure. */ |
| 4390 | |
| 4391 | static bfd_boolean |
| 4392 | mips_elf_resolve_got_page_ref (void **refp, void *data) |
| 4393 | { |
| 4394 | struct mips_got_page_ref *ref; |
| 4395 | struct mips_elf_traverse_got_arg *arg; |
| 4396 | struct mips_elf_link_hash_table *htab; |
| 4397 | asection *sec; |
| 4398 | bfd_vma addend; |
| 4399 | |
| 4400 | ref = (struct mips_got_page_ref *) *refp; |
| 4401 | arg = (struct mips_elf_traverse_got_arg *) data; |
| 4402 | htab = mips_elf_hash_table (arg->info); |
| 4403 | |
| 4404 | if (ref->symndx < 0) |
| 4405 | { |
| 4406 | struct mips_elf_link_hash_entry *h; |
| 4407 | |
| 4408 | /* Global GOT_PAGEs decay to GOT_DISP and so don't need page entries. */ |
| 4409 | h = ref->u.h; |
| 4410 | if (!SYMBOL_REFERENCES_LOCAL (arg->info, &h->root)) |
| 4411 | return 1; |
| 4412 | |
| 4413 | /* Ignore undefined symbols; we'll issue an error later if |
| 4414 | appropriate. */ |
| 4415 | if (!((h->root.root.type == bfd_link_hash_defined |
| 4416 | || h->root.root.type == bfd_link_hash_defweak) |
| 4417 | && h->root.root.u.def.section)) |
| 4418 | return 1; |
| 4419 | |
| 4420 | sec = h->root.root.u.def.section; |
| 4421 | addend = h->root.root.u.def.value + ref->addend; |
| 4422 | } |
| 4423 | else |
| 4424 | { |
| 4425 | Elf_Internal_Sym *isym; |
| 4426 | |
| 4427 | /* Read in the symbol. */ |
| 4428 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, ref->u.abfd, |
| 4429 | ref->symndx); |
| 4430 | if (isym == NULL) |
| 4431 | { |
| 4432 | arg->g = NULL; |
| 4433 | return 0; |
| 4434 | } |
| 4435 | |
| 4436 | /* Get the associated input section. */ |
| 4437 | sec = bfd_section_from_elf_index (ref->u.abfd, isym->st_shndx); |
| 4438 | if (sec == NULL) |
| 4439 | { |
| 4440 | arg->g = NULL; |
| 4441 | return 0; |
| 4442 | } |
| 4443 | |
| 4444 | /* If this is a mergable section, work out the section and offset |
| 4445 | of the merged data. For section symbols, the addend specifies |
| 4446 | of the offset _of_ the first byte in the data, otherwise it |
| 4447 | specifies the offset _from_ the first byte. */ |
| 4448 | if (sec->flags & SEC_MERGE) |
| 4449 | { |
| 4450 | void *secinfo; |
| 4451 | |
| 4452 | secinfo = elf_section_data (sec)->sec_info; |
| 4453 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) |
| 4454 | addend = _bfd_merged_section_offset (ref->u.abfd, &sec, secinfo, |
| 4455 | isym->st_value + ref->addend); |
| 4456 | else |
| 4457 | addend = _bfd_merged_section_offset (ref->u.abfd, &sec, secinfo, |
| 4458 | isym->st_value) + ref->addend; |
| 4459 | } |
| 4460 | else |
| 4461 | addend = isym->st_value + ref->addend; |
| 4462 | } |
| 4463 | if (!mips_elf_record_got_page_entry (arg, sec, addend)) |
| 4464 | { |
| 4465 | arg->g = NULL; |
| 4466 | return 0; |
| 4467 | } |
| 4468 | return 1; |
| 4469 | } |
| 4470 | |
| 4471 | /* If any entries in G->got_entries are for indirect or warning symbols, |
| 4472 | replace them with entries for the target symbol. Convert g->got_page_refs |
| 4473 | into got_page_entry structures and estimate the number of page entries |
| 4474 | that they require. */ |
| 4475 | |
| 4476 | static bfd_boolean |
| 4477 | mips_elf_resolve_final_got_entries (struct bfd_link_info *info, |
| 4478 | struct mips_got_info *g) |
| 4479 | { |
| 4480 | struct mips_elf_traverse_got_arg tga; |
| 4481 | struct mips_got_info oldg; |
| 4482 | |
| 4483 | oldg = *g; |
| 4484 | |
| 4485 | tga.info = info; |
| 4486 | tga.g = g; |
| 4487 | tga.value = FALSE; |
| 4488 | htab_traverse (g->got_entries, mips_elf_check_recreate_got, &tga); |
| 4489 | if (tga.value) |
| 4490 | { |
| 4491 | *g = oldg; |
| 4492 | g->got_entries = htab_create (htab_size (oldg.got_entries), |
| 4493 | mips_elf_got_entry_hash, |
| 4494 | mips_elf_got_entry_eq, NULL); |
| 4495 | if (!g->got_entries) |
| 4496 | return FALSE; |
| 4497 | |
| 4498 | htab_traverse (oldg.got_entries, mips_elf_recreate_got, &tga); |
| 4499 | if (!tga.g) |
| 4500 | return FALSE; |
| 4501 | |
| 4502 | htab_delete (oldg.got_entries); |
| 4503 | } |
| 4504 | |
| 4505 | g->got_page_entries = htab_try_create (1, mips_got_page_entry_hash, |
| 4506 | mips_got_page_entry_eq, NULL); |
| 4507 | if (g->got_page_entries == NULL) |
| 4508 | return FALSE; |
| 4509 | |
| 4510 | tga.info = info; |
| 4511 | tga.g = g; |
| 4512 | htab_traverse (g->got_page_refs, mips_elf_resolve_got_page_ref, &tga); |
| 4513 | |
| 4514 | return TRUE; |
| 4515 | } |
| 4516 | |
| 4517 | /* Return true if a GOT entry for H should live in the local rather than |
| 4518 | global GOT area. */ |
| 4519 | |
| 4520 | static bfd_boolean |
| 4521 | mips_use_local_got_p (struct bfd_link_info *info, |
| 4522 | struct mips_elf_link_hash_entry *h) |
| 4523 | { |
| 4524 | /* Symbols that aren't in the dynamic symbol table must live in the |
| 4525 | local GOT. This includes symbols that are completely undefined |
| 4526 | and which therefore don't bind locally. We'll report undefined |
| 4527 | symbols later if appropriate. */ |
| 4528 | if (h->root.dynindx == -1) |
| 4529 | return TRUE; |
| 4530 | |
| 4531 | /* Absolute symbols, if ever they need a GOT entry, cannot ever go |
| 4532 | to the local GOT, as they would be implicitly relocated by the |
| 4533 | base address by the dynamic loader. */ |
| 4534 | if (bfd_is_abs_symbol (&h->root.root)) |
| 4535 | return FALSE; |
| 4536 | |
| 4537 | /* Symbols that bind locally can (and in the case of forced-local |
| 4538 | symbols, must) live in the local GOT. */ |
| 4539 | if (h->got_only_for_calls |
| 4540 | ? SYMBOL_CALLS_LOCAL (info, &h->root) |
| 4541 | : SYMBOL_REFERENCES_LOCAL (info, &h->root)) |
| 4542 | return TRUE; |
| 4543 | |
| 4544 | /* If this is an executable that must provide a definition of the symbol, |
| 4545 | either though PLTs or copy relocations, then that address should go in |
| 4546 | the local rather than global GOT. */ |
| 4547 | if (bfd_link_executable (info) && h->has_static_relocs) |
| 4548 | return TRUE; |
| 4549 | |
| 4550 | return FALSE; |
| 4551 | } |
| 4552 | |
| 4553 | /* A mips_elf_link_hash_traverse callback for which DATA points to the |
| 4554 | link_info structure. Decide whether the hash entry needs an entry in |
| 4555 | the global part of the primary GOT, setting global_got_area accordingly. |
| 4556 | Count the number of global symbols that are in the primary GOT only |
| 4557 | because they have relocations against them (reloc_only_gotno). */ |
| 4558 | |
| 4559 | static int |
| 4560 | mips_elf_count_got_symbols (struct mips_elf_link_hash_entry *h, void *data) |
| 4561 | { |
| 4562 | struct bfd_link_info *info; |
| 4563 | struct mips_elf_link_hash_table *htab; |
| 4564 | struct mips_got_info *g; |
| 4565 | |
| 4566 | info = (struct bfd_link_info *) data; |
| 4567 | htab = mips_elf_hash_table (info); |
| 4568 | g = htab->got_info; |
| 4569 | if (h->global_got_area != GGA_NONE) |
| 4570 | { |
| 4571 | /* Make a final decision about whether the symbol belongs in the |
| 4572 | local or global GOT. */ |
| 4573 | if (mips_use_local_got_p (info, h)) |
| 4574 | /* The symbol belongs in the local GOT. We no longer need this |
| 4575 | entry if it was only used for relocations; those relocations |
| 4576 | will be against the null or section symbol instead of H. */ |
| 4577 | h->global_got_area = GGA_NONE; |
| 4578 | else if (htab->is_vxworks |
| 4579 | && h->got_only_for_calls |
| 4580 | && h->root.plt.plist->mips_offset != MINUS_ONE) |
| 4581 | /* On VxWorks, calls can refer directly to the .got.plt entry; |
| 4582 | they don't need entries in the regular GOT. .got.plt entries |
| 4583 | will be allocated by _bfd_mips_elf_adjust_dynamic_symbol. */ |
| 4584 | h->global_got_area = GGA_NONE; |
| 4585 | else if (h->global_got_area == GGA_RELOC_ONLY) |
| 4586 | { |
| 4587 | g->reloc_only_gotno++; |
| 4588 | g->global_gotno++; |
| 4589 | } |
| 4590 | } |
| 4591 | return 1; |
| 4592 | } |
| 4593 | \f |
| 4594 | /* A htab_traverse callback for GOT entries. Add each one to the GOT |
| 4595 | given in mips_elf_traverse_got_arg DATA. Clear DATA->G on error. */ |
| 4596 | |
| 4597 | static int |
| 4598 | mips_elf_add_got_entry (void **entryp, void *data) |
| 4599 | { |
| 4600 | struct mips_got_entry *entry; |
| 4601 | struct mips_elf_traverse_got_arg *arg; |
| 4602 | void **slot; |
| 4603 | |
| 4604 | entry = (struct mips_got_entry *) *entryp; |
| 4605 | arg = (struct mips_elf_traverse_got_arg *) data; |
| 4606 | slot = htab_find_slot (arg->g->got_entries, entry, INSERT); |
| 4607 | if (!slot) |
| 4608 | { |
| 4609 | arg->g = NULL; |
| 4610 | return 0; |
| 4611 | } |
| 4612 | if (!*slot) |
| 4613 | { |
| 4614 | *slot = entry; |
| 4615 | mips_elf_count_got_entry (arg->info, arg->g, entry); |
| 4616 | } |
| 4617 | return 1; |
| 4618 | } |
| 4619 | |
| 4620 | /* A htab_traverse callback for GOT page entries. Add each one to the GOT |
| 4621 | given in mips_elf_traverse_got_arg DATA. Clear DATA->G on error. */ |
| 4622 | |
| 4623 | static int |
| 4624 | mips_elf_add_got_page_entry (void **entryp, void *data) |
| 4625 | { |
| 4626 | struct mips_got_page_entry *entry; |
| 4627 | struct mips_elf_traverse_got_arg *arg; |
| 4628 | void **slot; |
| 4629 | |
| 4630 | entry = (struct mips_got_page_entry *) *entryp; |
| 4631 | arg = (struct mips_elf_traverse_got_arg *) data; |
| 4632 | slot = htab_find_slot (arg->g->got_page_entries, entry, INSERT); |
| 4633 | if (!slot) |
| 4634 | { |
| 4635 | arg->g = NULL; |
| 4636 | return 0; |
| 4637 | } |
| 4638 | if (!*slot) |
| 4639 | { |
| 4640 | *slot = entry; |
| 4641 | arg->g->page_gotno += entry->num_pages; |
| 4642 | } |
| 4643 | return 1; |
| 4644 | } |
| 4645 | |
| 4646 | /* Consider merging FROM, which is ABFD's GOT, into TO. Return -1 if |
| 4647 | this would lead to overflow, 1 if they were merged successfully, |
| 4648 | and 0 if a merge failed due to lack of memory. (These values are chosen |
| 4649 | so that nonnegative return values can be returned by a htab_traverse |
| 4650 | callback.) */ |
| 4651 | |
| 4652 | static int |
| 4653 | mips_elf_merge_got_with (bfd *abfd, struct mips_got_info *from, |
| 4654 | struct mips_got_info *to, |
| 4655 | struct mips_elf_got_per_bfd_arg *arg) |
| 4656 | { |
| 4657 | struct mips_elf_traverse_got_arg tga; |
| 4658 | unsigned int estimate; |
| 4659 | |
| 4660 | /* Work out how many page entries we would need for the combined GOT. */ |
| 4661 | estimate = arg->max_pages; |
| 4662 | if (estimate >= from->page_gotno + to->page_gotno) |
| 4663 | estimate = from->page_gotno + to->page_gotno; |
| 4664 | |
| 4665 | /* And conservatively estimate how many local and TLS entries |
| 4666 | would be needed. */ |
| 4667 | estimate += from->local_gotno + to->local_gotno; |
| 4668 | estimate += from->tls_gotno + to->tls_gotno; |
| 4669 | |
| 4670 | /* If we're merging with the primary got, any TLS relocations will |
| 4671 | come after the full set of global entries. Otherwise estimate those |
| 4672 | conservatively as well. */ |
| 4673 | if (to == arg->primary && from->tls_gotno + to->tls_gotno) |
| 4674 | estimate += arg->global_count; |
| 4675 | else |
| 4676 | estimate += from->global_gotno + to->global_gotno; |
| 4677 | |
| 4678 | /* Bail out if the combined GOT might be too big. */ |
| 4679 | if (estimate > arg->max_count) |
| 4680 | return -1; |
| 4681 | |
| 4682 | /* Transfer the bfd's got information from FROM to TO. */ |
| 4683 | tga.info = arg->info; |
| 4684 | tga.g = to; |
| 4685 | htab_traverse (from->got_entries, mips_elf_add_got_entry, &tga); |
| 4686 | if (!tga.g) |
| 4687 | return 0; |
| 4688 | |
| 4689 | htab_traverse (from->got_page_entries, mips_elf_add_got_page_entry, &tga); |
| 4690 | if (!tga.g) |
| 4691 | return 0; |
| 4692 | |
| 4693 | mips_elf_replace_bfd_got (abfd, to); |
| 4694 | return 1; |
| 4695 | } |
| 4696 | |
| 4697 | /* Attempt to merge GOT G, which belongs to ABFD. Try to use as much |
| 4698 | as possible of the primary got, since it doesn't require explicit |
| 4699 | dynamic relocations, but don't use bfds that would reference global |
| 4700 | symbols out of the addressable range. Failing the primary got, |
| 4701 | attempt to merge with the current got, or finish the current got |
| 4702 | and then make make the new got current. */ |
| 4703 | |
| 4704 | static bfd_boolean |
| 4705 | mips_elf_merge_got (bfd *abfd, struct mips_got_info *g, |
| 4706 | struct mips_elf_got_per_bfd_arg *arg) |
| 4707 | { |
| 4708 | unsigned int estimate; |
| 4709 | int result; |
| 4710 | |
| 4711 | if (!mips_elf_resolve_final_got_entries (arg->info, g)) |
| 4712 | return FALSE; |
| 4713 | |
| 4714 | /* Work out the number of page, local and TLS entries. */ |
| 4715 | estimate = arg->max_pages; |
| 4716 | if (estimate > g->page_gotno) |
| 4717 | estimate = g->page_gotno; |
| 4718 | estimate += g->local_gotno + g->tls_gotno; |
| 4719 | |
| 4720 | /* We place TLS GOT entries after both locals and globals. The globals |
| 4721 | for the primary GOT may overflow the normal GOT size limit, so be |
| 4722 | sure not to merge a GOT which requires TLS with the primary GOT in that |
| 4723 | case. This doesn't affect non-primary GOTs. */ |
| 4724 | estimate += (g->tls_gotno > 0 ? arg->global_count : g->global_gotno); |
| 4725 | |
| 4726 | if (estimate <= arg->max_count) |
| 4727 | { |
| 4728 | /* If we don't have a primary GOT, use it as |
| 4729 | a starting point for the primary GOT. */ |
| 4730 | if (!arg->primary) |
| 4731 | { |
| 4732 | arg->primary = g; |
| 4733 | return TRUE; |
| 4734 | } |
| 4735 | |
| 4736 | /* Try merging with the primary GOT. */ |
| 4737 | result = mips_elf_merge_got_with (abfd, g, arg->primary, arg); |
| 4738 | if (result >= 0) |
| 4739 | return result; |
| 4740 | } |
| 4741 | |
| 4742 | /* If we can merge with the last-created got, do it. */ |
| 4743 | if (arg->current) |
| 4744 | { |
| 4745 | result = mips_elf_merge_got_with (abfd, g, arg->current, arg); |
| 4746 | if (result >= 0) |
| 4747 | return result; |
| 4748 | } |
| 4749 | |
| 4750 | /* Well, we couldn't merge, so create a new GOT. Don't check if it |
| 4751 | fits; if it turns out that it doesn't, we'll get relocation |
| 4752 | overflows anyway. */ |
| 4753 | g->next = arg->current; |
| 4754 | arg->current = g; |
| 4755 | |
| 4756 | return TRUE; |
| 4757 | } |
| 4758 | |
| 4759 | /* ENTRYP is a hash table entry for a mips_got_entry. Set its gotidx |
| 4760 | to GOTIDX, duplicating the entry if it has already been assigned |
| 4761 | an index in a different GOT. */ |
| 4762 | |
| 4763 | static bfd_boolean |
| 4764 | mips_elf_set_gotidx (void **entryp, long gotidx) |
| 4765 | { |
| 4766 | struct mips_got_entry *entry; |
| 4767 | |
| 4768 | entry = (struct mips_got_entry *) *entryp; |
| 4769 | if (entry->gotidx > 0) |
| 4770 | { |
| 4771 | struct mips_got_entry *new_entry; |
| 4772 | |
| 4773 | new_entry = bfd_alloc (entry->abfd, sizeof (*entry)); |
| 4774 | if (!new_entry) |
| 4775 | return FALSE; |
| 4776 | |
| 4777 | *new_entry = *entry; |
| 4778 | *entryp = new_entry; |
| 4779 | entry = new_entry; |
| 4780 | } |
| 4781 | entry->gotidx = gotidx; |
| 4782 | return TRUE; |
| 4783 | } |
| 4784 | |
| 4785 | /* Set the TLS GOT index for the GOT entry in ENTRYP. DATA points to a |
| 4786 | mips_elf_traverse_got_arg in which DATA->value is the size of one |
| 4787 | GOT entry. Set DATA->g to null on failure. */ |
| 4788 | |
| 4789 | static int |
| 4790 | mips_elf_initialize_tls_index (void **entryp, void *data) |
| 4791 | { |
| 4792 | struct mips_got_entry *entry; |
| 4793 | struct mips_elf_traverse_got_arg *arg; |
| 4794 | |
| 4795 | /* We're only interested in TLS symbols. */ |
| 4796 | entry = (struct mips_got_entry *) *entryp; |
| 4797 | if (entry->tls_type == GOT_TLS_NONE) |
| 4798 | return 1; |
| 4799 | |
| 4800 | arg = (struct mips_elf_traverse_got_arg *) data; |
| 4801 | if (!mips_elf_set_gotidx (entryp, arg->value * arg->g->tls_assigned_gotno)) |
| 4802 | { |
| 4803 | arg->g = NULL; |
| 4804 | return 0; |
| 4805 | } |
| 4806 | |
| 4807 | /* Account for the entries we've just allocated. */ |
| 4808 | arg->g->tls_assigned_gotno += mips_tls_got_entries (entry->tls_type); |
| 4809 | return 1; |
| 4810 | } |
| 4811 | |
| 4812 | /* A htab_traverse callback for GOT entries, where DATA points to a |
| 4813 | mips_elf_traverse_got_arg. Set the global_got_area of each global |
| 4814 | symbol to DATA->value. */ |
| 4815 | |
| 4816 | static int |
| 4817 | mips_elf_set_global_got_area (void **entryp, void *data) |
| 4818 | { |
| 4819 | struct mips_got_entry *entry; |
| 4820 | struct mips_elf_traverse_got_arg *arg; |
| 4821 | |
| 4822 | entry = (struct mips_got_entry *) *entryp; |
| 4823 | arg = (struct mips_elf_traverse_got_arg *) data; |
| 4824 | if (entry->abfd != NULL |
| 4825 | && entry->symndx == -1 |
| 4826 | && entry->d.h->global_got_area != GGA_NONE) |
| 4827 | entry->d.h->global_got_area = arg->value; |
| 4828 | return 1; |
| 4829 | } |
| 4830 | |
| 4831 | /* A htab_traverse callback for secondary GOT entries, where DATA points |
| 4832 | to a mips_elf_traverse_got_arg. Assign GOT indices to global entries |
| 4833 | and record the number of relocations they require. DATA->value is |
| 4834 | the size of one GOT entry. Set DATA->g to null on failure. */ |
| 4835 | |
| 4836 | static int |
| 4837 | mips_elf_set_global_gotidx (void **entryp, void *data) |
| 4838 | { |
| 4839 | struct mips_got_entry *entry; |
| 4840 | struct mips_elf_traverse_got_arg *arg; |
| 4841 | |
| 4842 | entry = (struct mips_got_entry *) *entryp; |
| 4843 | arg = (struct mips_elf_traverse_got_arg *) data; |
| 4844 | if (entry->abfd != NULL |
| 4845 | && entry->symndx == -1 |
| 4846 | && entry->d.h->global_got_area != GGA_NONE) |
| 4847 | { |
| 4848 | if (!mips_elf_set_gotidx (entryp, arg->value * arg->g->assigned_low_gotno)) |
| 4849 | { |
| 4850 | arg->g = NULL; |
| 4851 | return 0; |
| 4852 | } |
| 4853 | arg->g->assigned_low_gotno += 1; |
| 4854 | |
| 4855 | if (bfd_link_pic (arg->info) |
| 4856 | || (elf_hash_table (arg->info)->dynamic_sections_created |
| 4857 | && entry->d.h->root.def_dynamic |
| 4858 | && !entry->d.h->root.def_regular)) |
| 4859 | arg->g->relocs += 1; |
| 4860 | } |
| 4861 | |
| 4862 | return 1; |
| 4863 | } |
| 4864 | |
| 4865 | /* A htab_traverse callback for GOT entries for which DATA is the |
| 4866 | bfd_link_info. Forbid any global symbols from having traditional |
| 4867 | lazy-binding stubs. */ |
| 4868 | |
| 4869 | static int |
| 4870 | mips_elf_forbid_lazy_stubs (void **entryp, void *data) |
| 4871 | { |
| 4872 | struct bfd_link_info *info; |
| 4873 | struct mips_elf_link_hash_table *htab; |
| 4874 | struct mips_got_entry *entry; |
| 4875 | |
| 4876 | entry = (struct mips_got_entry *) *entryp; |
| 4877 | info = (struct bfd_link_info *) data; |
| 4878 | htab = mips_elf_hash_table (info); |
| 4879 | BFD_ASSERT (htab != NULL); |
| 4880 | |
| 4881 | if (entry->abfd != NULL |
| 4882 | && entry->symndx == -1 |
| 4883 | && entry->d.h->needs_lazy_stub) |
| 4884 | { |
| 4885 | entry->d.h->needs_lazy_stub = FALSE; |
| 4886 | htab->lazy_stub_count--; |
| 4887 | } |
| 4888 | |
| 4889 | return 1; |
| 4890 | } |
| 4891 | |
| 4892 | /* Return the offset of an input bfd IBFD's GOT from the beginning of |
| 4893 | the primary GOT. */ |
| 4894 | static bfd_vma |
| 4895 | mips_elf_adjust_gp (bfd *abfd, struct mips_got_info *g, bfd *ibfd) |
| 4896 | { |
| 4897 | if (!g->next) |
| 4898 | return 0; |
| 4899 | |
| 4900 | g = mips_elf_bfd_got (ibfd, FALSE); |
| 4901 | if (! g) |
| 4902 | return 0; |
| 4903 | |
| 4904 | BFD_ASSERT (g->next); |
| 4905 | |
| 4906 | g = g->next; |
| 4907 | |
| 4908 | return (g->local_gotno + g->global_gotno + g->tls_gotno) |
| 4909 | * MIPS_ELF_GOT_SIZE (abfd); |
| 4910 | } |
| 4911 | |
| 4912 | /* Turn a single GOT that is too big for 16-bit addressing into |
| 4913 | a sequence of GOTs, each one 16-bit addressable. */ |
| 4914 | |
| 4915 | static bfd_boolean |
| 4916 | mips_elf_multi_got (bfd *abfd, struct bfd_link_info *info, |
| 4917 | asection *got, bfd_size_type pages) |
| 4918 | { |
| 4919 | struct mips_elf_link_hash_table *htab; |
| 4920 | struct mips_elf_got_per_bfd_arg got_per_bfd_arg; |
| 4921 | struct mips_elf_traverse_got_arg tga; |
| 4922 | struct mips_got_info *g, *gg; |
| 4923 | unsigned int assign, needed_relocs; |
| 4924 | bfd *dynobj, *ibfd; |
| 4925 | |
| 4926 | dynobj = elf_hash_table (info)->dynobj; |
| 4927 | htab = mips_elf_hash_table (info); |
| 4928 | BFD_ASSERT (htab != NULL); |
| 4929 | |
| 4930 | g = htab->got_info; |
| 4931 | |
| 4932 | got_per_bfd_arg.obfd = abfd; |
| 4933 | got_per_bfd_arg.info = info; |
| 4934 | got_per_bfd_arg.current = NULL; |
| 4935 | got_per_bfd_arg.primary = NULL; |
| 4936 | got_per_bfd_arg.max_count = ((MIPS_ELF_GOT_MAX_SIZE (info) |
| 4937 | / MIPS_ELF_GOT_SIZE (abfd)) |
| 4938 | - htab->reserved_gotno); |
| 4939 | got_per_bfd_arg.max_pages = pages; |
| 4940 | /* The number of globals that will be included in the primary GOT. |
| 4941 | See the calls to mips_elf_set_global_got_area below for more |
| 4942 | information. */ |
| 4943 | got_per_bfd_arg.global_count = g->global_gotno; |
| 4944 | |
| 4945 | /* Try to merge the GOTs of input bfds together, as long as they |
| 4946 | don't seem to exceed the maximum GOT size, choosing one of them |
| 4947 | to be the primary GOT. */ |
| 4948 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) |
| 4949 | { |
| 4950 | gg = mips_elf_bfd_got (ibfd, FALSE); |
| 4951 | if (gg && !mips_elf_merge_got (ibfd, gg, &got_per_bfd_arg)) |
| 4952 | return FALSE; |
| 4953 | } |
| 4954 | |
| 4955 | /* If we do not find any suitable primary GOT, create an empty one. */ |
| 4956 | if (got_per_bfd_arg.primary == NULL) |
| 4957 | g->next = mips_elf_create_got_info (abfd); |
| 4958 | else |
| 4959 | g->next = got_per_bfd_arg.primary; |
| 4960 | g->next->next = got_per_bfd_arg.current; |
| 4961 | |
| 4962 | /* GG is now the master GOT, and G is the primary GOT. */ |
| 4963 | gg = g; |
| 4964 | g = g->next; |
| 4965 | |
| 4966 | /* Map the output bfd to the primary got. That's what we're going |
| 4967 | to use for bfds that use GOT16 or GOT_PAGE relocations that we |
| 4968 | didn't mark in check_relocs, and we want a quick way to find it. |
| 4969 | We can't just use gg->next because we're going to reverse the |
| 4970 | list. */ |
| 4971 | mips_elf_replace_bfd_got (abfd, g); |
| 4972 | |
| 4973 | /* Every symbol that is referenced in a dynamic relocation must be |
| 4974 | present in the primary GOT, so arrange for them to appear after |
| 4975 | those that are actually referenced. */ |
| 4976 | gg->reloc_only_gotno = gg->global_gotno - g->global_gotno; |
| 4977 | g->global_gotno = gg->global_gotno; |
| 4978 | |
| 4979 | tga.info = info; |
| 4980 | tga.value = GGA_RELOC_ONLY; |
| 4981 | htab_traverse (gg->got_entries, mips_elf_set_global_got_area, &tga); |
| 4982 | tga.value = GGA_NORMAL; |
| 4983 | htab_traverse (g->got_entries, mips_elf_set_global_got_area, &tga); |
| 4984 | |
| 4985 | /* Now go through the GOTs assigning them offset ranges. |
| 4986 | [assigned_low_gotno, local_gotno[ will be set to the range of local |
| 4987 | entries in each GOT. We can then compute the end of a GOT by |
| 4988 | adding local_gotno to global_gotno. We reverse the list and make |
| 4989 | it circular since then we'll be able to quickly compute the |
| 4990 | beginning of a GOT, by computing the end of its predecessor. To |
| 4991 | avoid special cases for the primary GOT, while still preserving |
| 4992 | assertions that are valid for both single- and multi-got links, |
| 4993 | we arrange for the main got struct to have the right number of |
| 4994 | global entries, but set its local_gotno such that the initial |
| 4995 | offset of the primary GOT is zero. Remember that the primary GOT |
| 4996 | will become the last item in the circular linked list, so it |
| 4997 | points back to the master GOT. */ |
| 4998 | gg->local_gotno = -g->global_gotno; |
| 4999 | gg->global_gotno = g->global_gotno; |
| 5000 | gg->tls_gotno = 0; |
| 5001 | assign = 0; |
| 5002 | gg->next = gg; |
| 5003 | |
| 5004 | do |
| 5005 | { |
| 5006 | struct mips_got_info *gn; |
| 5007 | |
| 5008 | assign += htab->reserved_gotno; |
| 5009 | g->assigned_low_gotno = assign; |
| 5010 | g->local_gotno += assign; |
| 5011 | g->local_gotno += (pages < g->page_gotno ? pages : g->page_gotno); |
| 5012 | g->assigned_high_gotno = g->local_gotno - 1; |
| 5013 | assign = g->local_gotno + g->global_gotno + g->tls_gotno; |
| 5014 | |
| 5015 | /* Take g out of the direct list, and push it onto the reversed |
| 5016 | list that gg points to. g->next is guaranteed to be nonnull after |
| 5017 | this operation, as required by mips_elf_initialize_tls_index. */ |
| 5018 | gn = g->next; |
| 5019 | g->next = gg->next; |
| 5020 | gg->next = g; |
| 5021 | |
| 5022 | /* Set up any TLS entries. We always place the TLS entries after |
| 5023 | all non-TLS entries. */ |
| 5024 | g->tls_assigned_gotno = g->local_gotno + g->global_gotno; |
| 5025 | tga.g = g; |
| 5026 | tga.value = MIPS_ELF_GOT_SIZE (abfd); |
| 5027 | htab_traverse (g->got_entries, mips_elf_initialize_tls_index, &tga); |
| 5028 | if (!tga.g) |
| 5029 | return FALSE; |
| 5030 | BFD_ASSERT (g->tls_assigned_gotno == assign); |
| 5031 | |
| 5032 | /* Move onto the next GOT. It will be a secondary GOT if nonull. */ |
| 5033 | g = gn; |
| 5034 | |
| 5035 | /* Forbid global symbols in every non-primary GOT from having |
| 5036 | lazy-binding stubs. */ |
| 5037 | if (g) |
| 5038 | htab_traverse (g->got_entries, mips_elf_forbid_lazy_stubs, info); |
| 5039 | } |
| 5040 | while (g); |
| 5041 | |
| 5042 | got->size = assign * MIPS_ELF_GOT_SIZE (abfd); |
| 5043 | |
| 5044 | needed_relocs = 0; |
| 5045 | for (g = gg->next; g && g->next != gg; g = g->next) |
| 5046 | { |
| 5047 | unsigned int save_assign; |
| 5048 | |
| 5049 | /* Assign offsets to global GOT entries and count how many |
| 5050 | relocations they need. */ |
| 5051 | save_assign = g->assigned_low_gotno; |
| 5052 | g->assigned_low_gotno = g->local_gotno; |
| 5053 | tga.info = info; |
| 5054 | tga.value = MIPS_ELF_GOT_SIZE (abfd); |
| 5055 | tga.g = g; |
| 5056 | htab_traverse (g->got_entries, mips_elf_set_global_gotidx, &tga); |
| 5057 | if (!tga.g) |
| 5058 | return FALSE; |
| 5059 | BFD_ASSERT (g->assigned_low_gotno == g->local_gotno + g->global_gotno); |
| 5060 | g->assigned_low_gotno = save_assign; |
| 5061 | |
| 5062 | if (bfd_link_pic (info)) |
| 5063 | { |
| 5064 | g->relocs += g->local_gotno - g->assigned_low_gotno; |
| 5065 | BFD_ASSERT (g->assigned_low_gotno == g->next->local_gotno |
| 5066 | + g->next->global_gotno |
| 5067 | + g->next->tls_gotno |
| 5068 | + htab->reserved_gotno); |
| 5069 | } |
| 5070 | needed_relocs += g->relocs; |
| 5071 | } |
| 5072 | needed_relocs += g->relocs; |
| 5073 | |
| 5074 | if (needed_relocs) |
| 5075 | mips_elf_allocate_dynamic_relocations (dynobj, info, |
| 5076 | needed_relocs); |
| 5077 | |
| 5078 | return TRUE; |
| 5079 | } |
| 5080 | |
| 5081 | \f |
| 5082 | /* Returns the first relocation of type r_type found, beginning with |
| 5083 | RELOCATION. RELEND is one-past-the-end of the relocation table. */ |
| 5084 | |
| 5085 | static const Elf_Internal_Rela * |
| 5086 | mips_elf_next_relocation (bfd *abfd ATTRIBUTE_UNUSED, unsigned int r_type, |
| 5087 | const Elf_Internal_Rela *relocation, |
| 5088 | const Elf_Internal_Rela *relend) |
| 5089 | { |
| 5090 | unsigned long r_symndx = ELF_R_SYM (abfd, relocation->r_info); |
| 5091 | |
| 5092 | while (relocation < relend) |
| 5093 | { |
| 5094 | if (ELF_R_TYPE (abfd, relocation->r_info) == r_type |
| 5095 | && ELF_R_SYM (abfd, relocation->r_info) == r_symndx) |
| 5096 | return relocation; |
| 5097 | |
| 5098 | ++relocation; |
| 5099 | } |
| 5100 | |
| 5101 | /* We didn't find it. */ |
| 5102 | return NULL; |
| 5103 | } |
| 5104 | |
| 5105 | /* Return whether an input relocation is against a local symbol. */ |
| 5106 | |
| 5107 | static bfd_boolean |
| 5108 | mips_elf_local_relocation_p (bfd *input_bfd, |
| 5109 | const Elf_Internal_Rela *relocation, |
| 5110 | asection **local_sections) |
| 5111 | { |
| 5112 | unsigned long r_symndx; |
| 5113 | Elf_Internal_Shdr *symtab_hdr; |
| 5114 | size_t extsymoff; |
| 5115 | |
| 5116 | r_symndx = ELF_R_SYM (input_bfd, relocation->r_info); |
| 5117 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 5118 | extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info; |
| 5119 | |
| 5120 | if (r_symndx < extsymoff) |
| 5121 | return TRUE; |
| 5122 | if (elf_bad_symtab (input_bfd) && local_sections[r_symndx] != NULL) |
| 5123 | return TRUE; |
| 5124 | |
| 5125 | return FALSE; |
| 5126 | } |
| 5127 | \f |
| 5128 | /* Sign-extend VALUE, which has the indicated number of BITS. */ |
| 5129 | |
| 5130 | bfd_vma |
| 5131 | _bfd_mips_elf_sign_extend (bfd_vma value, int bits) |
| 5132 | { |
| 5133 | if (value & ((bfd_vma) 1 << (bits - 1))) |
| 5134 | /* VALUE is negative. */ |
| 5135 | value |= ((bfd_vma) - 1) << bits; |
| 5136 | |
| 5137 | return value; |
| 5138 | } |
| 5139 | |
| 5140 | /* Return non-zero if the indicated VALUE has overflowed the maximum |
| 5141 | range expressible by a signed number with the indicated number of |
| 5142 | BITS. */ |
| 5143 | |
| 5144 | static bfd_boolean |
| 5145 | mips_elf_overflow_p (bfd_vma value, int bits) |
| 5146 | { |
| 5147 | bfd_signed_vma svalue = (bfd_signed_vma) value; |
| 5148 | |
| 5149 | if (svalue > (1 << (bits - 1)) - 1) |
| 5150 | /* The value is too big. */ |
| 5151 | return TRUE; |
| 5152 | else if (svalue < -(1 << (bits - 1))) |
| 5153 | /* The value is too small. */ |
| 5154 | return TRUE; |
| 5155 | |
| 5156 | /* All is well. */ |
| 5157 | return FALSE; |
| 5158 | } |
| 5159 | |
| 5160 | /* Calculate the %high function. */ |
| 5161 | |
| 5162 | static bfd_vma |
| 5163 | mips_elf_high (bfd_vma value) |
| 5164 | { |
| 5165 | return ((value + (bfd_vma) 0x8000) >> 16) & 0xffff; |
| 5166 | } |
| 5167 | |
| 5168 | /* Calculate the %higher function. */ |
| 5169 | |
| 5170 | static bfd_vma |
| 5171 | mips_elf_higher (bfd_vma value ATTRIBUTE_UNUSED) |
| 5172 | { |
| 5173 | #ifdef BFD64 |
| 5174 | return ((value + (bfd_vma) 0x80008000) >> 32) & 0xffff; |
| 5175 | #else |
| 5176 | abort (); |
| 5177 | return MINUS_ONE; |
| 5178 | #endif |
| 5179 | } |
| 5180 | |
| 5181 | /* Calculate the %highest function. */ |
| 5182 | |
| 5183 | static bfd_vma |
| 5184 | mips_elf_highest (bfd_vma value ATTRIBUTE_UNUSED) |
| 5185 | { |
| 5186 | #ifdef BFD64 |
| 5187 | return ((value + (((bfd_vma) 0x8000 << 32) | 0x80008000)) >> 48) & 0xffff; |
| 5188 | #else |
| 5189 | abort (); |
| 5190 | return MINUS_ONE; |
| 5191 | #endif |
| 5192 | } |
| 5193 | \f |
| 5194 | /* Create the .compact_rel section. */ |
| 5195 | |
| 5196 | static bfd_boolean |
| 5197 | mips_elf_create_compact_rel_section |
| 5198 | (bfd *abfd, struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 5199 | { |
| 5200 | flagword flags; |
| 5201 | register asection *s; |
| 5202 | |
| 5203 | if (bfd_get_linker_section (abfd, ".compact_rel") == NULL) |
| 5204 | { |
| 5205 | flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| 5206 | | SEC_READONLY); |
| 5207 | |
| 5208 | s = bfd_make_section_anyway_with_flags (abfd, ".compact_rel", flags); |
| 5209 | if (s == NULL |
| 5210 | || !bfd_set_section_alignment (s, MIPS_ELF_LOG_FILE_ALIGN (abfd))) |
| 5211 | return FALSE; |
| 5212 | |
| 5213 | s->size = sizeof (Elf32_External_compact_rel); |
| 5214 | } |
| 5215 | |
| 5216 | return TRUE; |
| 5217 | } |
| 5218 | |
| 5219 | /* Create the .got section to hold the global offset table. */ |
| 5220 | |
| 5221 | static bfd_boolean |
| 5222 | mips_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
| 5223 | { |
| 5224 | flagword flags; |
| 5225 | register asection *s; |
| 5226 | struct elf_link_hash_entry *h; |
| 5227 | struct bfd_link_hash_entry *bh; |
| 5228 | struct mips_elf_link_hash_table *htab; |
| 5229 | |
| 5230 | htab = mips_elf_hash_table (info); |
| 5231 | BFD_ASSERT (htab != NULL); |
| 5232 | |
| 5233 | /* This function may be called more than once. */ |
| 5234 | if (htab->root.sgot) |
| 5235 | return TRUE; |
| 5236 | |
| 5237 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 5238 | | SEC_LINKER_CREATED); |
| 5239 | |
| 5240 | /* We have to use an alignment of 2**4 here because this is hardcoded |
| 5241 | in the function stub generation and in the linker script. */ |
| 5242 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
| 5243 | if (s == NULL |
| 5244 | || !bfd_set_section_alignment (s, 4)) |
| 5245 | return FALSE; |
| 5246 | htab->root.sgot = s; |
| 5247 | |
| 5248 | /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the |
| 5249 | linker script because we don't want to define the symbol if we |
| 5250 | are not creating a global offset table. */ |
| 5251 | bh = NULL; |
| 5252 | if (! (_bfd_generic_link_add_one_symbol |
| 5253 | (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, |
| 5254 | 0, NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
| 5255 | return FALSE; |
| 5256 | |
| 5257 | h = (struct elf_link_hash_entry *) bh; |
| 5258 | h->non_elf = 0; |
| 5259 | h->def_regular = 1; |
| 5260 | h->type = STT_OBJECT; |
| 5261 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; |
| 5262 | elf_hash_table (info)->hgot = h; |
| 5263 | |
| 5264 | if (bfd_link_pic (info) |
| 5265 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5266 | return FALSE; |
| 5267 | |
| 5268 | htab->got_info = mips_elf_create_got_info (abfd); |
| 5269 | mips_elf_section_data (s)->elf.this_hdr.sh_flags |
| 5270 | |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; |
| 5271 | |
| 5272 | /* We also need a .got.plt section when generating PLTs. */ |
| 5273 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", |
| 5274 | SEC_ALLOC | SEC_LOAD |
| 5275 | | SEC_HAS_CONTENTS |
| 5276 | | SEC_IN_MEMORY |
| 5277 | | SEC_LINKER_CREATED); |
| 5278 | if (s == NULL) |
| 5279 | return FALSE; |
| 5280 | htab->root.sgotplt = s; |
| 5281 | |
| 5282 | return TRUE; |
| 5283 | } |
| 5284 | \f |
| 5285 | /* Return true if H refers to the special VxWorks __GOTT_BASE__ or |
| 5286 | __GOTT_INDEX__ symbols. These symbols are only special for |
| 5287 | shared objects; they are not used in executables. */ |
| 5288 | |
| 5289 | static bfd_boolean |
| 5290 | is_gott_symbol (struct bfd_link_info *info, struct elf_link_hash_entry *h) |
| 5291 | { |
| 5292 | return (mips_elf_hash_table (info)->is_vxworks |
| 5293 | && bfd_link_pic (info) |
| 5294 | && (strcmp (h->root.root.string, "__GOTT_BASE__") == 0 |
| 5295 | || strcmp (h->root.root.string, "__GOTT_INDEX__") == 0)); |
| 5296 | } |
| 5297 | |
| 5298 | /* Return TRUE if a relocation of type R_TYPE from INPUT_BFD might |
| 5299 | require an la25 stub. See also mips_elf_local_pic_function_p, |
| 5300 | which determines whether the destination function ever requires a |
| 5301 | stub. */ |
| 5302 | |
| 5303 | static bfd_boolean |
| 5304 | mips_elf_relocation_needs_la25_stub (bfd *input_bfd, int r_type, |
| 5305 | bfd_boolean target_is_16_bit_code_p) |
| 5306 | { |
| 5307 | /* We specifically ignore branches and jumps from EF_PIC objects, |
| 5308 | where the onus is on the compiler or programmer to perform any |
| 5309 | necessary initialization of $25. Sometimes such initialization |
| 5310 | is unnecessary; for example, -mno-shared functions do not use |
| 5311 | the incoming value of $25, and may therefore be called directly. */ |
| 5312 | if (PIC_OBJECT_P (input_bfd)) |
| 5313 | return FALSE; |
| 5314 | |
| 5315 | switch (r_type) |
| 5316 | { |
| 5317 | case R_MIPS_26: |
| 5318 | case R_MIPS_PC16: |
| 5319 | case R_MIPS_PC21_S2: |
| 5320 | case R_MIPS_PC26_S2: |
| 5321 | case R_MICROMIPS_26_S1: |
| 5322 | case R_MICROMIPS_PC7_S1: |
| 5323 | case R_MICROMIPS_PC10_S1: |
| 5324 | case R_MICROMIPS_PC16_S1: |
| 5325 | case R_MICROMIPS_PC23_S2: |
| 5326 | return TRUE; |
| 5327 | |
| 5328 | case R_MIPS16_26: |
| 5329 | return !target_is_16_bit_code_p; |
| 5330 | |
| 5331 | default: |
| 5332 | return FALSE; |
| 5333 | } |
| 5334 | } |
| 5335 | \f |
| 5336 | /* Obtain the field relocated by RELOCATION. */ |
| 5337 | |
| 5338 | static bfd_vma |
| 5339 | mips_elf_obtain_contents (reloc_howto_type *howto, |
| 5340 | const Elf_Internal_Rela *relocation, |
| 5341 | bfd *input_bfd, bfd_byte *contents) |
| 5342 | { |
| 5343 | bfd_vma x = 0; |
| 5344 | bfd_byte *location = contents + relocation->r_offset; |
| 5345 | unsigned int size = bfd_get_reloc_size (howto); |
| 5346 | |
| 5347 | /* Obtain the bytes. */ |
| 5348 | if (size != 0) |
| 5349 | x = bfd_get (8 * size, input_bfd, location); |
| 5350 | |
| 5351 | return x; |
| 5352 | } |
| 5353 | |
| 5354 | /* Store the field relocated by RELOCATION. */ |
| 5355 | |
| 5356 | static void |
| 5357 | mips_elf_store_contents (reloc_howto_type *howto, |
| 5358 | const Elf_Internal_Rela *relocation, |
| 5359 | bfd *input_bfd, bfd_byte *contents, bfd_vma x) |
| 5360 | { |
| 5361 | bfd_byte *location = contents + relocation->r_offset; |
| 5362 | unsigned int size = bfd_get_reloc_size (howto); |
| 5363 | |
| 5364 | /* Put the value into the output. */ |
| 5365 | if (size != 0) |
| 5366 | bfd_put (8 * size, input_bfd, x, location); |
| 5367 | } |
| 5368 | |
| 5369 | /* Try to patch a load from GOT instruction in CONTENTS pointed to by |
| 5370 | RELOCATION described by HOWTO, with a move of 0 to the load target |
| 5371 | register, returning TRUE if that is successful and FALSE otherwise. |
| 5372 | If DOIT is FALSE, then only determine it patching is possible and |
| 5373 | return status without actually changing CONTENTS. |
| 5374 | */ |
| 5375 | |
| 5376 | static bfd_boolean |
| 5377 | mips_elf_nullify_got_load (bfd *input_bfd, bfd_byte *contents, |
| 5378 | const Elf_Internal_Rela *relocation, |
| 5379 | reloc_howto_type *howto, bfd_boolean doit) |
| 5380 | { |
| 5381 | int r_type = ELF_R_TYPE (input_bfd, relocation->r_info); |
| 5382 | bfd_byte *location = contents + relocation->r_offset; |
| 5383 | bfd_boolean nullified = TRUE; |
| 5384 | bfd_vma x; |
| 5385 | |
| 5386 | _bfd_mips_elf_reloc_unshuffle (input_bfd, r_type, FALSE, location); |
| 5387 | |
| 5388 | /* Obtain the current value. */ |
| 5389 | x = mips_elf_obtain_contents (howto, relocation, input_bfd, contents); |
| 5390 | |
| 5391 | /* Note that in the unshuffled MIPS16 encoding RX is at bits [21:19] |
| 5392 | while RY is at bits [18:16] of the combined 32-bit instruction word. */ |
| 5393 | if (mips16_reloc_p (r_type) |
| 5394 | && (((x >> 22) & 0x3ff) == 0x3d3 /* LW */ |
| 5395 | || ((x >> 22) & 0x3ff) == 0x3c7)) /* LD */ |
| 5396 | x = (0x3cd << 22) | (x & (7 << 16)) << 3; /* LI */ |
| 5397 | else if (micromips_reloc_p (r_type) |
| 5398 | && ((x >> 26) & 0x37) == 0x37) /* LW/LD */ |
| 5399 | x = (0xc << 26) | (x & (0x1f << 21)); /* ADDIU */ |
| 5400 | else if (((x >> 26) & 0x3f) == 0x23 /* LW */ |
| 5401 | || ((x >> 26) & 0x3f) == 0x37) /* LD */ |
| 5402 | x = (0x9 << 26) | (x & (0x1f << 16)); /* ADDIU */ |
| 5403 | else |
| 5404 | nullified = FALSE; |
| 5405 | |
| 5406 | /* Put the value into the output. */ |
| 5407 | if (doit && nullified) |
| 5408 | mips_elf_store_contents (howto, relocation, input_bfd, contents, x); |
| 5409 | |
| 5410 | _bfd_mips_elf_reloc_shuffle (input_bfd, r_type, FALSE, location); |
| 5411 | |
| 5412 | return nullified; |
| 5413 | } |
| 5414 | |
| 5415 | /* Calculate the value produced by the RELOCATION (which comes from |
| 5416 | the INPUT_BFD). The ADDEND is the addend to use for this |
| 5417 | RELOCATION; RELOCATION->R_ADDEND is ignored. |
| 5418 | |
| 5419 | The result of the relocation calculation is stored in VALUEP. |
| 5420 | On exit, set *CROSS_MODE_JUMP_P to true if the relocation field |
| 5421 | is a MIPS16 or microMIPS jump to standard MIPS code, or vice versa. |
| 5422 | |
| 5423 | This function returns bfd_reloc_continue if the caller need take no |
| 5424 | further action regarding this relocation, bfd_reloc_notsupported if |
| 5425 | something goes dramatically wrong, bfd_reloc_overflow if an |
| 5426 | overflow occurs, and bfd_reloc_ok to indicate success. */ |
| 5427 | |
| 5428 | static bfd_reloc_status_type |
| 5429 | mips_elf_calculate_relocation (bfd *abfd, bfd *input_bfd, |
| 5430 | asection *input_section, bfd_byte *contents, |
| 5431 | struct bfd_link_info *info, |
| 5432 | const Elf_Internal_Rela *relocation, |
| 5433 | bfd_vma addend, reloc_howto_type *howto, |
| 5434 | Elf_Internal_Sym *local_syms, |
| 5435 | asection **local_sections, bfd_vma *valuep, |
| 5436 | const char **namep, |
| 5437 | bfd_boolean *cross_mode_jump_p, |
| 5438 | bfd_boolean save_addend) |
| 5439 | { |
| 5440 | /* The eventual value we will return. */ |
| 5441 | bfd_vma value; |
| 5442 | /* The address of the symbol against which the relocation is |
| 5443 | occurring. */ |
| 5444 | bfd_vma symbol = 0; |
| 5445 | /* The final GP value to be used for the relocatable, executable, or |
| 5446 | shared object file being produced. */ |
| 5447 | bfd_vma gp; |
| 5448 | /* The place (section offset or address) of the storage unit being |
| 5449 | relocated. */ |
| 5450 | bfd_vma p; |
| 5451 | /* The value of GP used to create the relocatable object. */ |
| 5452 | bfd_vma gp0; |
| 5453 | /* The offset into the global offset table at which the address of |
| 5454 | the relocation entry symbol, adjusted by the addend, resides |
| 5455 | during execution. */ |
| 5456 | bfd_vma g = MINUS_ONE; |
| 5457 | /* The section in which the symbol referenced by the relocation is |
| 5458 | located. */ |
| 5459 | asection *sec = NULL; |
| 5460 | struct mips_elf_link_hash_entry *h = NULL; |
| 5461 | /* TRUE if the symbol referred to by this relocation is a local |
| 5462 | symbol. */ |
| 5463 | bfd_boolean local_p, was_local_p; |
| 5464 | /* TRUE if the symbol referred to by this relocation is a section |
| 5465 | symbol. */ |
| 5466 | bfd_boolean section_p = FALSE; |
| 5467 | /* TRUE if the symbol referred to by this relocation is "_gp_disp". */ |
| 5468 | bfd_boolean gp_disp_p = FALSE; |
| 5469 | /* TRUE if the symbol referred to by this relocation is |
| 5470 | "__gnu_local_gp". */ |
| 5471 | bfd_boolean gnu_local_gp_p = FALSE; |
| 5472 | Elf_Internal_Shdr *symtab_hdr; |
| 5473 | size_t extsymoff; |
| 5474 | unsigned long r_symndx; |
| 5475 | int r_type; |
| 5476 | /* TRUE if overflow occurred during the calculation of the |
| 5477 | relocation value. */ |
| 5478 | bfd_boolean overflowed_p; |
| 5479 | /* TRUE if this relocation refers to a MIPS16 function. */ |
| 5480 | bfd_boolean target_is_16_bit_code_p = FALSE; |
| 5481 | bfd_boolean target_is_micromips_code_p = FALSE; |
| 5482 | struct mips_elf_link_hash_table *htab; |
| 5483 | bfd *dynobj; |
| 5484 | bfd_boolean resolved_to_zero; |
| 5485 | |
| 5486 | dynobj = elf_hash_table (info)->dynobj; |
| 5487 | htab = mips_elf_hash_table (info); |
| 5488 | BFD_ASSERT (htab != NULL); |
| 5489 | |
| 5490 | /* Parse the relocation. */ |
| 5491 | r_symndx = ELF_R_SYM (input_bfd, relocation->r_info); |
| 5492 | r_type = ELF_R_TYPE (input_bfd, relocation->r_info); |
| 5493 | p = (input_section->output_section->vma |
| 5494 | + input_section->output_offset |
| 5495 | + relocation->r_offset); |
| 5496 | |
| 5497 | /* Assume that there will be no overflow. */ |
| 5498 | overflowed_p = FALSE; |
| 5499 | |
| 5500 | /* Figure out whether or not the symbol is local, and get the offset |
| 5501 | used in the array of hash table entries. */ |
| 5502 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 5503 | local_p = mips_elf_local_relocation_p (input_bfd, relocation, |
| 5504 | local_sections); |
| 5505 | was_local_p = local_p; |
| 5506 | if (! elf_bad_symtab (input_bfd)) |
| 5507 | extsymoff = symtab_hdr->sh_info; |
| 5508 | else |
| 5509 | { |
| 5510 | /* The symbol table does not follow the rule that local symbols |
| 5511 | must come before globals. */ |
| 5512 | extsymoff = 0; |
| 5513 | } |
| 5514 | |
| 5515 | /* Figure out the value of the symbol. */ |
| 5516 | if (local_p) |
| 5517 | { |
| 5518 | bfd_boolean micromips_p = MICROMIPS_P (abfd); |
| 5519 | Elf_Internal_Sym *sym; |
| 5520 | |
| 5521 | sym = local_syms + r_symndx; |
| 5522 | sec = local_sections[r_symndx]; |
| 5523 | |
| 5524 | section_p = ELF_ST_TYPE (sym->st_info) == STT_SECTION; |
| 5525 | |
| 5526 | symbol = sec->output_section->vma + sec->output_offset; |
| 5527 | if (!section_p || (sec->flags & SEC_MERGE)) |
| 5528 | symbol += sym->st_value; |
| 5529 | if ((sec->flags & SEC_MERGE) && section_p) |
| 5530 | { |
| 5531 | addend = _bfd_elf_rel_local_sym (abfd, sym, &sec, addend); |
| 5532 | addend -= symbol; |
| 5533 | addend += sec->output_section->vma + sec->output_offset; |
| 5534 | } |
| 5535 | |
| 5536 | /* MIPS16/microMIPS text labels should be treated as odd. */ |
| 5537 | if (ELF_ST_IS_COMPRESSED (sym->st_other)) |
| 5538 | ++symbol; |
| 5539 | |
| 5540 | /* Record the name of this symbol, for our caller. */ |
| 5541 | *namep = bfd_elf_string_from_elf_section (input_bfd, |
| 5542 | symtab_hdr->sh_link, |
| 5543 | sym->st_name); |
| 5544 | if (*namep == NULL || **namep == '\0') |
| 5545 | *namep = bfd_section_name (sec); |
| 5546 | |
| 5547 | /* For relocations against a section symbol and ones against no |
| 5548 | symbol (absolute relocations) infer the ISA mode from the addend. */ |
| 5549 | if (section_p || r_symndx == STN_UNDEF) |
| 5550 | { |
| 5551 | target_is_16_bit_code_p = (addend & 1) && !micromips_p; |
| 5552 | target_is_micromips_code_p = (addend & 1) && micromips_p; |
| 5553 | } |
| 5554 | /* For relocations against an absolute symbol infer the ISA mode |
| 5555 | from the value of the symbol plus addend. */ |
| 5556 | else if (bfd_is_abs_section (sec)) |
| 5557 | { |
| 5558 | target_is_16_bit_code_p = ((symbol + addend) & 1) && !micromips_p; |
| 5559 | target_is_micromips_code_p = ((symbol + addend) & 1) && micromips_p; |
| 5560 | } |
| 5561 | /* Otherwise just use the regular symbol annotation available. */ |
| 5562 | else |
| 5563 | { |
| 5564 | target_is_16_bit_code_p = ELF_ST_IS_MIPS16 (sym->st_other); |
| 5565 | target_is_micromips_code_p = ELF_ST_IS_MICROMIPS (sym->st_other); |
| 5566 | } |
| 5567 | } |
| 5568 | else |
| 5569 | { |
| 5570 | /* ??? Could we use RELOC_FOR_GLOBAL_SYMBOL here ? */ |
| 5571 | |
| 5572 | /* For global symbols we look up the symbol in the hash-table. */ |
| 5573 | h = ((struct mips_elf_link_hash_entry *) |
| 5574 | elf_sym_hashes (input_bfd) [r_symndx - extsymoff]); |
| 5575 | /* Find the real hash-table entry for this symbol. */ |
| 5576 | while (h->root.root.type == bfd_link_hash_indirect |
| 5577 | || h->root.root.type == bfd_link_hash_warning) |
| 5578 | h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link; |
| 5579 | |
| 5580 | /* Record the name of this symbol, for our caller. */ |
| 5581 | *namep = h->root.root.root.string; |
| 5582 | |
| 5583 | /* See if this is the special _gp_disp symbol. Note that such a |
| 5584 | symbol must always be a global symbol. */ |
| 5585 | if (strcmp (*namep, "_gp_disp") == 0 |
| 5586 | && ! NEWABI_P (input_bfd)) |
| 5587 | { |
| 5588 | /* Relocations against _gp_disp are permitted only with |
| 5589 | R_MIPS_HI16 and R_MIPS_LO16 relocations. */ |
| 5590 | if (!hi16_reloc_p (r_type) && !lo16_reloc_p (r_type)) |
| 5591 | return bfd_reloc_notsupported; |
| 5592 | |
| 5593 | gp_disp_p = TRUE; |
| 5594 | } |
| 5595 | /* See if this is the special _gp symbol. Note that such a |
| 5596 | symbol must always be a global symbol. */ |
| 5597 | else if (strcmp (*namep, "__gnu_local_gp") == 0) |
| 5598 | gnu_local_gp_p = TRUE; |
| 5599 | |
| 5600 | |
| 5601 | /* If this symbol is defined, calculate its address. Note that |
| 5602 | _gp_disp is a magic symbol, always implicitly defined by the |
| 5603 | linker, so it's inappropriate to check to see whether or not |
| 5604 | its defined. */ |
| 5605 | else if ((h->root.root.type == bfd_link_hash_defined |
| 5606 | || h->root.root.type == bfd_link_hash_defweak) |
| 5607 | && h->root.root.u.def.section) |
| 5608 | { |
| 5609 | sec = h->root.root.u.def.section; |
| 5610 | if (sec->output_section) |
| 5611 | symbol = (h->root.root.u.def.value |
| 5612 | + sec->output_section->vma |
| 5613 | + sec->output_offset); |
| 5614 | else |
| 5615 | symbol = h->root.root.u.def.value; |
| 5616 | } |
| 5617 | else if (h->root.root.type == bfd_link_hash_undefweak) |
| 5618 | /* We allow relocations against undefined weak symbols, giving |
| 5619 | it the value zero, so that you can undefined weak functions |
| 5620 | and check to see if they exist by looking at their |
| 5621 | addresses. */ |
| 5622 | symbol = 0; |
| 5623 | else if (info->unresolved_syms_in_objects == RM_IGNORE |
| 5624 | && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT) |
| 5625 | symbol = 0; |
| 5626 | else if (strcmp (*namep, SGI_COMPAT (input_bfd) |
| 5627 | ? "_DYNAMIC_LINK" : "_DYNAMIC_LINKING") == 0) |
| 5628 | { |
| 5629 | /* If this is a dynamic link, we should have created a |
| 5630 | _DYNAMIC_LINK symbol or _DYNAMIC_LINKING(for normal mips) symbol |
| 5631 | in _bfd_mips_elf_create_dynamic_sections. |
| 5632 | Otherwise, we should define the symbol with a value of 0. |
| 5633 | FIXME: It should probably get into the symbol table |
| 5634 | somehow as well. */ |
| 5635 | BFD_ASSERT (! bfd_link_pic (info)); |
| 5636 | BFD_ASSERT (bfd_get_section_by_name (abfd, ".dynamic") == NULL); |
| 5637 | symbol = 0; |
| 5638 | } |
| 5639 | else if (ELF_MIPS_IS_OPTIONAL (h->root.other)) |
| 5640 | { |
| 5641 | /* This is an optional symbol - an Irix specific extension to the |
| 5642 | ELF spec. Ignore it for now. |
| 5643 | XXX - FIXME - there is more to the spec for OPTIONAL symbols |
| 5644 | than simply ignoring them, but we do not handle this for now. |
| 5645 | For information see the "64-bit ELF Object File Specification" |
| 5646 | which is available from here: |
| 5647 | http://techpubs.sgi.com/library/manuals/4000/007-4658-001/pdf/007-4658-001.pdf */ |
| 5648 | symbol = 0; |
| 5649 | } |
| 5650 | else |
| 5651 | { |
| 5652 | bfd_boolean reject_undefined |
| 5653 | = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR |
| 5654 | || ELF_ST_VISIBILITY (h->root.other) != STV_DEFAULT); |
| 5655 | |
| 5656 | (*info->callbacks->undefined_symbol) |
| 5657 | (info, h->root.root.root.string, input_bfd, |
| 5658 | input_section, relocation->r_offset, reject_undefined); |
| 5659 | |
| 5660 | if (reject_undefined) |
| 5661 | return bfd_reloc_undefined; |
| 5662 | |
| 5663 | symbol = 0; |
| 5664 | } |
| 5665 | |
| 5666 | target_is_16_bit_code_p = ELF_ST_IS_MIPS16 (h->root.other); |
| 5667 | target_is_micromips_code_p = ELF_ST_IS_MICROMIPS (h->root.other); |
| 5668 | } |
| 5669 | |
| 5670 | /* If this is a reference to a 16-bit function with a stub, we need |
| 5671 | to redirect the relocation to the stub unless: |
| 5672 | |
| 5673 | (a) the relocation is for a MIPS16 JAL; |
| 5674 | |
| 5675 | (b) the relocation is for a MIPS16 PIC call, and there are no |
| 5676 | non-MIPS16 uses of the GOT slot; or |
| 5677 | |
| 5678 | (c) the section allows direct references to MIPS16 functions. */ |
| 5679 | if (r_type != R_MIPS16_26 |
| 5680 | && !bfd_link_relocatable (info) |
| 5681 | && ((h != NULL |
| 5682 | && h->fn_stub != NULL |
| 5683 | && (r_type != R_MIPS16_CALL16 || h->need_fn_stub)) |
| 5684 | || (local_p |
| 5685 | && mips_elf_tdata (input_bfd)->local_stubs != NULL |
| 5686 | && mips_elf_tdata (input_bfd)->local_stubs[r_symndx] != NULL)) |
| 5687 | && !section_allows_mips16_refs_p (input_section)) |
| 5688 | { |
| 5689 | /* This is a 32- or 64-bit call to a 16-bit function. We should |
| 5690 | have already noticed that we were going to need the |
| 5691 | stub. */ |
| 5692 | if (local_p) |
| 5693 | { |
| 5694 | sec = mips_elf_tdata (input_bfd)->local_stubs[r_symndx]; |
| 5695 | value = 0; |
| 5696 | } |
| 5697 | else |
| 5698 | { |
| 5699 | BFD_ASSERT (h->need_fn_stub); |
| 5700 | if (h->la25_stub) |
| 5701 | { |
| 5702 | /* If a LA25 header for the stub itself exists, point to the |
| 5703 | prepended LUI/ADDIU sequence. */ |
| 5704 | sec = h->la25_stub->stub_section; |
| 5705 | value = h->la25_stub->offset; |
| 5706 | } |
| 5707 | else |
| 5708 | { |
| 5709 | sec = h->fn_stub; |
| 5710 | value = 0; |
| 5711 | } |
| 5712 | } |
| 5713 | |
| 5714 | symbol = sec->output_section->vma + sec->output_offset + value; |
| 5715 | /* The target is 16-bit, but the stub isn't. */ |
| 5716 | target_is_16_bit_code_p = FALSE; |
| 5717 | } |
| 5718 | /* If this is a MIPS16 call with a stub, that is made through the PLT or |
| 5719 | to a standard MIPS function, we need to redirect the call to the stub. |
| 5720 | Note that we specifically exclude R_MIPS16_CALL16 from this behavior; |
| 5721 | indirect calls should use an indirect stub instead. */ |
| 5722 | else if (r_type == R_MIPS16_26 && !bfd_link_relocatable (info) |
| 5723 | && ((h != NULL && (h->call_stub != NULL || h->call_fp_stub != NULL)) |
| 5724 | || (local_p |
| 5725 | && mips_elf_tdata (input_bfd)->local_call_stubs != NULL |
| 5726 | && mips_elf_tdata (input_bfd)->local_call_stubs[r_symndx] != NULL)) |
| 5727 | && ((h != NULL && h->use_plt_entry) || !target_is_16_bit_code_p)) |
| 5728 | { |
| 5729 | if (local_p) |
| 5730 | sec = mips_elf_tdata (input_bfd)->local_call_stubs[r_symndx]; |
| 5731 | else |
| 5732 | { |
| 5733 | /* If both call_stub and call_fp_stub are defined, we can figure |
| 5734 | out which one to use by checking which one appears in the input |
| 5735 | file. */ |
| 5736 | if (h->call_stub != NULL && h->call_fp_stub != NULL) |
| 5737 | { |
| 5738 | asection *o; |
| 5739 | |
| 5740 | sec = NULL; |
| 5741 | for (o = input_bfd->sections; o != NULL; o = o->next) |
| 5742 | { |
| 5743 | if (CALL_FP_STUB_P (bfd_section_name (o))) |
| 5744 | { |
| 5745 | sec = h->call_fp_stub; |
| 5746 | break; |
| 5747 | } |
| 5748 | } |
| 5749 | if (sec == NULL) |
| 5750 | sec = h->call_stub; |
| 5751 | } |
| 5752 | else if (h->call_stub != NULL) |
| 5753 | sec = h->call_stub; |
| 5754 | else |
| 5755 | sec = h->call_fp_stub; |
| 5756 | } |
| 5757 | |
| 5758 | BFD_ASSERT (sec->size > 0); |
| 5759 | symbol = sec->output_section->vma + sec->output_offset; |
| 5760 | } |
| 5761 | /* If this is a direct call to a PIC function, redirect to the |
| 5762 | non-PIC stub. */ |
| 5763 | else if (h != NULL && h->la25_stub |
| 5764 | && mips_elf_relocation_needs_la25_stub (input_bfd, r_type, |
| 5765 | target_is_16_bit_code_p)) |
| 5766 | { |
| 5767 | symbol = (h->la25_stub->stub_section->output_section->vma |
| 5768 | + h->la25_stub->stub_section->output_offset |
| 5769 | + h->la25_stub->offset); |
| 5770 | if (ELF_ST_IS_MICROMIPS (h->root.other)) |
| 5771 | symbol |= 1; |
| 5772 | } |
| 5773 | /* For direct MIPS16 and microMIPS calls make sure the compressed PLT |
| 5774 | entry is used if a standard PLT entry has also been made. In this |
| 5775 | case the symbol will have been set by mips_elf_set_plt_sym_value |
| 5776 | to point to the standard PLT entry, so redirect to the compressed |
| 5777 | one. */ |
| 5778 | else if ((mips16_branch_reloc_p (r_type) |
| 5779 | || micromips_branch_reloc_p (r_type)) |
| 5780 | && !bfd_link_relocatable (info) |
| 5781 | && h != NULL |
| 5782 | && h->use_plt_entry |
| 5783 | && h->root.plt.plist->comp_offset != MINUS_ONE |
| 5784 | && h->root.plt.plist->mips_offset != MINUS_ONE) |
| 5785 | { |
| 5786 | bfd_boolean micromips_p = MICROMIPS_P (abfd); |
| 5787 | |
| 5788 | sec = htab->root.splt; |
| 5789 | symbol = (sec->output_section->vma |
| 5790 | + sec->output_offset |
| 5791 | + htab->plt_header_size |
| 5792 | + htab->plt_mips_offset |
| 5793 | + h->root.plt.plist->comp_offset |
| 5794 | + 1); |
| 5795 | |
| 5796 | target_is_16_bit_code_p = !micromips_p; |
| 5797 | target_is_micromips_code_p = micromips_p; |
| 5798 | } |
| 5799 | |
| 5800 | /* Make sure MIPS16 and microMIPS are not used together. */ |
| 5801 | if ((mips16_branch_reloc_p (r_type) && target_is_micromips_code_p) |
| 5802 | || (micromips_branch_reloc_p (r_type) && target_is_16_bit_code_p)) |
| 5803 | { |
| 5804 | _bfd_error_handler |
| 5805 | (_("MIPS16 and microMIPS functions cannot call each other")); |
| 5806 | return bfd_reloc_notsupported; |
| 5807 | } |
| 5808 | |
| 5809 | /* Calls from 16-bit code to 32-bit code and vice versa require the |
| 5810 | mode change. However, we can ignore calls to undefined weak symbols, |
| 5811 | which should never be executed at runtime. This exception is important |
| 5812 | because the assembly writer may have "known" that any definition of the |
| 5813 | symbol would be 16-bit code, and that direct jumps were therefore |
| 5814 | acceptable. */ |
| 5815 | *cross_mode_jump_p = (!bfd_link_relocatable (info) |
| 5816 | && !(h && h->root.root.type == bfd_link_hash_undefweak) |
| 5817 | && ((mips16_branch_reloc_p (r_type) |
| 5818 | && !target_is_16_bit_code_p) |
| 5819 | || (micromips_branch_reloc_p (r_type) |
| 5820 | && !target_is_micromips_code_p) |
| 5821 | || ((branch_reloc_p (r_type) |
| 5822 | || r_type == R_MIPS_JALR) |
| 5823 | && (target_is_16_bit_code_p |
| 5824 | || target_is_micromips_code_p)))); |
| 5825 | |
| 5826 | resolved_to_zero = (h != NULL |
| 5827 | && UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->root)); |
| 5828 | |
| 5829 | switch (r_type) |
| 5830 | { |
| 5831 | case R_MIPS16_CALL16: |
| 5832 | case R_MIPS16_GOT16: |
| 5833 | case R_MIPS_CALL16: |
| 5834 | case R_MIPS_GOT16: |
| 5835 | case R_MIPS_GOT_PAGE: |
| 5836 | case R_MIPS_GOT_DISP: |
| 5837 | case R_MIPS_GOT_LO16: |
| 5838 | case R_MIPS_CALL_LO16: |
| 5839 | case R_MICROMIPS_CALL16: |
| 5840 | case R_MICROMIPS_GOT16: |
| 5841 | case R_MICROMIPS_GOT_PAGE: |
| 5842 | case R_MICROMIPS_GOT_DISP: |
| 5843 | case R_MICROMIPS_GOT_LO16: |
| 5844 | case R_MICROMIPS_CALL_LO16: |
| 5845 | if (resolved_to_zero |
| 5846 | && !bfd_link_relocatable (info) |
| 5847 | && mips_elf_nullify_got_load (input_bfd, contents, |
| 5848 | relocation, howto, TRUE)) |
| 5849 | return bfd_reloc_continue; |
| 5850 | |
| 5851 | /* Fall through. */ |
| 5852 | case R_MIPS_GOT_HI16: |
| 5853 | case R_MIPS_CALL_HI16: |
| 5854 | case R_MICROMIPS_GOT_HI16: |
| 5855 | case R_MICROMIPS_CALL_HI16: |
| 5856 | if (resolved_to_zero |
| 5857 | && htab->use_absolute_zero |
| 5858 | && bfd_link_pic (info)) |
| 5859 | { |
| 5860 | /* Redirect to the special `__gnu_absolute_zero' symbol. */ |
| 5861 | h = mips_elf_link_hash_lookup (htab, "__gnu_absolute_zero", |
| 5862 | FALSE, FALSE, FALSE); |
| 5863 | BFD_ASSERT (h != NULL); |
| 5864 | } |
| 5865 | break; |
| 5866 | } |
| 5867 | |
| 5868 | local_p = (h == NULL || mips_use_local_got_p (info, h)); |
| 5869 | |
| 5870 | gp0 = _bfd_get_gp_value (input_bfd); |
| 5871 | gp = _bfd_get_gp_value (abfd); |
| 5872 | if (htab->got_info) |
| 5873 | gp += mips_elf_adjust_gp (abfd, htab->got_info, input_bfd); |
| 5874 | |
| 5875 | if (gnu_local_gp_p) |
| 5876 | symbol = gp; |
| 5877 | |
| 5878 | /* Global R_MIPS_GOT_PAGE/R_MICROMIPS_GOT_PAGE relocations are equivalent |
| 5879 | to R_MIPS_GOT_DISP/R_MICROMIPS_GOT_DISP. The addend is applied by the |
| 5880 | corresponding R_MIPS_GOT_OFST/R_MICROMIPS_GOT_OFST. */ |
| 5881 | if (got_page_reloc_p (r_type) && !local_p) |
| 5882 | { |
| 5883 | r_type = (micromips_reloc_p (r_type) |
| 5884 | ? R_MICROMIPS_GOT_DISP : R_MIPS_GOT_DISP); |
| 5885 | addend = 0; |
| 5886 | } |
| 5887 | |
| 5888 | /* If we haven't already determined the GOT offset, and we're going |
| 5889 | to need it, get it now. */ |
| 5890 | switch (r_type) |
| 5891 | { |
| 5892 | case R_MIPS16_CALL16: |
| 5893 | case R_MIPS16_GOT16: |
| 5894 | case R_MIPS_CALL16: |
| 5895 | case R_MIPS_GOT16: |
| 5896 | case R_MIPS_GOT_DISP: |
| 5897 | case R_MIPS_GOT_HI16: |
| 5898 | case R_MIPS_CALL_HI16: |
| 5899 | case R_MIPS_GOT_LO16: |
| 5900 | case R_MIPS_CALL_LO16: |
| 5901 | case R_MICROMIPS_CALL16: |
| 5902 | case R_MICROMIPS_GOT16: |
| 5903 | case R_MICROMIPS_GOT_DISP: |
| 5904 | case R_MICROMIPS_GOT_HI16: |
| 5905 | case R_MICROMIPS_CALL_HI16: |
| 5906 | case R_MICROMIPS_GOT_LO16: |
| 5907 | case R_MICROMIPS_CALL_LO16: |
| 5908 | case R_MIPS_TLS_GD: |
| 5909 | case R_MIPS_TLS_GOTTPREL: |
| 5910 | case R_MIPS_TLS_LDM: |
| 5911 | case R_MIPS16_TLS_GD: |
| 5912 | case R_MIPS16_TLS_GOTTPREL: |
| 5913 | case R_MIPS16_TLS_LDM: |
| 5914 | case R_MICROMIPS_TLS_GD: |
| 5915 | case R_MICROMIPS_TLS_GOTTPREL: |
| 5916 | case R_MICROMIPS_TLS_LDM: |
| 5917 | /* Find the index into the GOT where this value is located. */ |
| 5918 | if (tls_ldm_reloc_p (r_type)) |
| 5919 | { |
| 5920 | g = mips_elf_local_got_index (abfd, input_bfd, info, |
| 5921 | 0, 0, NULL, r_type); |
| 5922 | if (g == MINUS_ONE) |
| 5923 | return bfd_reloc_outofrange; |
| 5924 | } |
| 5925 | else if (!local_p) |
| 5926 | { |
| 5927 | /* On VxWorks, CALL relocations should refer to the .got.plt |
| 5928 | entry, which is initialized to point at the PLT stub. */ |
| 5929 | if (htab->is_vxworks |
| 5930 | && (call_hi16_reloc_p (r_type) |
| 5931 | || call_lo16_reloc_p (r_type) |
| 5932 | || call16_reloc_p (r_type))) |
| 5933 | { |
| 5934 | BFD_ASSERT (addend == 0); |
| 5935 | BFD_ASSERT (h->root.needs_plt); |
| 5936 | g = mips_elf_gotplt_index (info, &h->root); |
| 5937 | } |
| 5938 | else |
| 5939 | { |
| 5940 | BFD_ASSERT (addend == 0); |
| 5941 | g = mips_elf_global_got_index (abfd, info, input_bfd, |
| 5942 | &h->root, r_type); |
| 5943 | if (!TLS_RELOC_P (r_type) |
| 5944 | && !elf_hash_table (info)->dynamic_sections_created) |
| 5945 | /* This is a static link. We must initialize the GOT entry. */ |
| 5946 | MIPS_ELF_PUT_WORD (dynobj, symbol, htab->root.sgot->contents + g); |
| 5947 | } |
| 5948 | } |
| 5949 | else if (!htab->is_vxworks |
| 5950 | && (call16_reloc_p (r_type) || got16_reloc_p (r_type))) |
| 5951 | /* The calculation below does not involve "g". */ |
| 5952 | break; |
| 5953 | else |
| 5954 | { |
| 5955 | g = mips_elf_local_got_index (abfd, input_bfd, info, |
| 5956 | symbol + addend, r_symndx, h, r_type); |
| 5957 | if (g == MINUS_ONE) |
| 5958 | return bfd_reloc_outofrange; |
| 5959 | } |
| 5960 | |
| 5961 | /* Convert GOT indices to actual offsets. */ |
| 5962 | g = mips_elf_got_offset_from_index (info, abfd, input_bfd, g); |
| 5963 | break; |
| 5964 | } |
| 5965 | |
| 5966 | /* Relocations against the VxWorks __GOTT_BASE__ and __GOTT_INDEX__ |
| 5967 | symbols are resolved by the loader. Add them to .rela.dyn. */ |
| 5968 | if (h != NULL && is_gott_symbol (info, &h->root)) |
| 5969 | { |
| 5970 | Elf_Internal_Rela outrel; |
| 5971 | bfd_byte *loc; |
| 5972 | asection *s; |
| 5973 | |
| 5974 | s = mips_elf_rel_dyn_section (info, FALSE); |
| 5975 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 5976 | |
| 5977 | outrel.r_offset = (input_section->output_section->vma |
| 5978 | + input_section->output_offset |
| 5979 | + relocation->r_offset); |
| 5980 | outrel.r_info = ELF32_R_INFO (h->root.dynindx, r_type); |
| 5981 | outrel.r_addend = addend; |
| 5982 | bfd_elf32_swap_reloca_out (abfd, &outrel, loc); |
| 5983 | |
| 5984 | /* If we've written this relocation for a readonly section, |
| 5985 | we need to set DF_TEXTREL again, so that we do not delete the |
| 5986 | DT_TEXTREL tag. */ |
| 5987 | if (MIPS_ELF_READONLY_SECTION (input_section)) |
| 5988 | info->flags |= DF_TEXTREL; |
| 5989 | |
| 5990 | *valuep = 0; |
| 5991 | return bfd_reloc_ok; |
| 5992 | } |
| 5993 | |
| 5994 | /* Figure out what kind of relocation is being performed. */ |
| 5995 | switch (r_type) |
| 5996 | { |
| 5997 | case R_MIPS_NONE: |
| 5998 | return bfd_reloc_continue; |
| 5999 | |
| 6000 | case R_MIPS_16: |
| 6001 | if (howto->partial_inplace) |
| 6002 | addend = _bfd_mips_elf_sign_extend (addend, 16); |
| 6003 | value = symbol + addend; |
| 6004 | overflowed_p = mips_elf_overflow_p (value, 16); |
| 6005 | break; |
| 6006 | |
| 6007 | case R_MIPS_32: |
| 6008 | case R_MIPS_REL32: |
| 6009 | case R_MIPS_64: |
| 6010 | if ((bfd_link_pic (info) |
| 6011 | || (htab->root.dynamic_sections_created |
| 6012 | && h != NULL |
| 6013 | && h->root.def_dynamic |
| 6014 | && !h->root.def_regular |
| 6015 | && !h->has_static_relocs)) |
| 6016 | && r_symndx != STN_UNDEF |
| 6017 | && (h == NULL |
| 6018 | || h->root.root.type != bfd_link_hash_undefweak |
| 6019 | || (ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT |
| 6020 | && !resolved_to_zero)) |
| 6021 | && (input_section->flags & SEC_ALLOC) != 0) |
| 6022 | { |
| 6023 | /* If we're creating a shared library, then we can't know |
| 6024 | where the symbol will end up. So, we create a relocation |
| 6025 | record in the output, and leave the job up to the dynamic |
| 6026 | linker. We must do the same for executable references to |
| 6027 | shared library symbols, unless we've decided to use copy |
| 6028 | relocs or PLTs instead. */ |
| 6029 | value = addend; |
| 6030 | if (!mips_elf_create_dynamic_relocation (abfd, |
| 6031 | info, |
| 6032 | relocation, |
| 6033 | h, |
| 6034 | sec, |
| 6035 | symbol, |
| 6036 | &value, |
| 6037 | input_section)) |
| 6038 | return bfd_reloc_undefined; |
| 6039 | } |
| 6040 | else |
| 6041 | { |
| 6042 | if (r_type != R_MIPS_REL32) |
| 6043 | value = symbol + addend; |
| 6044 | else |
| 6045 | value = addend; |
| 6046 | } |
| 6047 | value &= howto->dst_mask; |
| 6048 | break; |
| 6049 | |
| 6050 | case R_MIPS_PC32: |
| 6051 | value = symbol + addend - p; |
| 6052 | value &= howto->dst_mask; |
| 6053 | break; |
| 6054 | |
| 6055 | case R_MIPS16_26: |
| 6056 | /* The calculation for R_MIPS16_26 is just the same as for an |
| 6057 | R_MIPS_26. It's only the storage of the relocated field into |
| 6058 | the output file that's different. That's handled in |
| 6059 | mips_elf_perform_relocation. So, we just fall through to the |
| 6060 | R_MIPS_26 case here. */ |
| 6061 | case R_MIPS_26: |
| 6062 | case R_MICROMIPS_26_S1: |
| 6063 | { |
| 6064 | unsigned int shift; |
| 6065 | |
| 6066 | /* Shift is 2, unusually, for microMIPS JALX. */ |
| 6067 | shift = (!*cross_mode_jump_p && r_type == R_MICROMIPS_26_S1) ? 1 : 2; |
| 6068 | |
| 6069 | if (howto->partial_inplace && !section_p) |
| 6070 | value = _bfd_mips_elf_sign_extend (addend, 26 + shift); |
| 6071 | else |
| 6072 | value = addend; |
| 6073 | value += symbol; |
| 6074 | |
| 6075 | /* Make sure the target of a jump is suitably aligned. Bit 0 must |
| 6076 | be the correct ISA mode selector except for weak undefined |
| 6077 | symbols. */ |
| 6078 | if ((was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6079 | && (*cross_mode_jump_p |
| 6080 | ? (value & 3) != (r_type == R_MIPS_26) |
| 6081 | : (value & ((1 << shift) - 1)) != (r_type != R_MIPS_26))) |
| 6082 | return bfd_reloc_outofrange; |
| 6083 | |
| 6084 | value >>= shift; |
| 6085 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6086 | overflowed_p = (value >> 26) != ((p + 4) >> (26 + shift)); |
| 6087 | value &= howto->dst_mask; |
| 6088 | } |
| 6089 | break; |
| 6090 | |
| 6091 | case R_MIPS_TLS_DTPREL_HI16: |
| 6092 | case R_MIPS16_TLS_DTPREL_HI16: |
| 6093 | case R_MICROMIPS_TLS_DTPREL_HI16: |
| 6094 | value = (mips_elf_high (addend + symbol - dtprel_base (info)) |
| 6095 | & howto->dst_mask); |
| 6096 | break; |
| 6097 | |
| 6098 | case R_MIPS_TLS_DTPREL_LO16: |
| 6099 | case R_MIPS_TLS_DTPREL32: |
| 6100 | case R_MIPS_TLS_DTPREL64: |
| 6101 | case R_MIPS16_TLS_DTPREL_LO16: |
| 6102 | case R_MICROMIPS_TLS_DTPREL_LO16: |
| 6103 | value = (symbol + addend - dtprel_base (info)) & howto->dst_mask; |
| 6104 | break; |
| 6105 | |
| 6106 | case R_MIPS_TLS_TPREL_HI16: |
| 6107 | case R_MIPS16_TLS_TPREL_HI16: |
| 6108 | case R_MICROMIPS_TLS_TPREL_HI16: |
| 6109 | value = (mips_elf_high (addend + symbol - tprel_base (info)) |
| 6110 | & howto->dst_mask); |
| 6111 | break; |
| 6112 | |
| 6113 | case R_MIPS_TLS_TPREL_LO16: |
| 6114 | case R_MIPS_TLS_TPREL32: |
| 6115 | case R_MIPS_TLS_TPREL64: |
| 6116 | case R_MIPS16_TLS_TPREL_LO16: |
| 6117 | case R_MICROMIPS_TLS_TPREL_LO16: |
| 6118 | value = (symbol + addend - tprel_base (info)) & howto->dst_mask; |
| 6119 | break; |
| 6120 | |
| 6121 | case R_MIPS_HI16: |
| 6122 | case R_MIPS16_HI16: |
| 6123 | case R_MICROMIPS_HI16: |
| 6124 | if (!gp_disp_p) |
| 6125 | { |
| 6126 | value = mips_elf_high (addend + symbol); |
| 6127 | value &= howto->dst_mask; |
| 6128 | } |
| 6129 | else |
| 6130 | { |
| 6131 | /* For MIPS16 ABI code we generate this sequence |
| 6132 | 0: li $v0,%hi(_gp_disp) |
| 6133 | 4: addiupc $v1,%lo(_gp_disp) |
| 6134 | 8: sll $v0,16 |
| 6135 | 12: addu $v0,$v1 |
| 6136 | 14: move $gp,$v0 |
| 6137 | So the offsets of hi and lo relocs are the same, but the |
| 6138 | base $pc is that used by the ADDIUPC instruction at $t9 + 4. |
| 6139 | ADDIUPC clears the low two bits of the instruction address, |
| 6140 | so the base is ($t9 + 4) & ~3. */ |
| 6141 | if (r_type == R_MIPS16_HI16) |
| 6142 | value = mips_elf_high (addend + gp - ((p + 4) & ~(bfd_vma) 0x3)); |
| 6143 | /* The microMIPS .cpload sequence uses the same assembly |
| 6144 | instructions as the traditional psABI version, but the |
| 6145 | incoming $t9 has the low bit set. */ |
| 6146 | else if (r_type == R_MICROMIPS_HI16) |
| 6147 | value = mips_elf_high (addend + gp - p - 1); |
| 6148 | else |
| 6149 | value = mips_elf_high (addend + gp - p); |
| 6150 | } |
| 6151 | break; |
| 6152 | |
| 6153 | case R_MIPS_LO16: |
| 6154 | case R_MIPS16_LO16: |
| 6155 | case R_MICROMIPS_LO16: |
| 6156 | case R_MICROMIPS_HI0_LO16: |
| 6157 | if (!gp_disp_p) |
| 6158 | value = (symbol + addend) & howto->dst_mask; |
| 6159 | else |
| 6160 | { |
| 6161 | /* See the comment for R_MIPS16_HI16 above for the reason |
| 6162 | for this conditional. */ |
| 6163 | if (r_type == R_MIPS16_LO16) |
| 6164 | value = addend + gp - (p & ~(bfd_vma) 0x3); |
| 6165 | else if (r_type == R_MICROMIPS_LO16 |
| 6166 | || r_type == R_MICROMIPS_HI0_LO16) |
| 6167 | value = addend + gp - p + 3; |
| 6168 | else |
| 6169 | value = addend + gp - p + 4; |
| 6170 | /* The MIPS ABI requires checking the R_MIPS_LO16 relocation |
| 6171 | for overflow. But, on, say, IRIX5, relocations against |
| 6172 | _gp_disp are normally generated from the .cpload |
| 6173 | pseudo-op. It generates code that normally looks like |
| 6174 | this: |
| 6175 | |
| 6176 | lui $gp,%hi(_gp_disp) |
| 6177 | addiu $gp,$gp,%lo(_gp_disp) |
| 6178 | addu $gp,$gp,$t9 |
| 6179 | |
| 6180 | Here $t9 holds the address of the function being called, |
| 6181 | as required by the MIPS ELF ABI. The R_MIPS_LO16 |
| 6182 | relocation can easily overflow in this situation, but the |
| 6183 | R_MIPS_HI16 relocation will handle the overflow. |
| 6184 | Therefore, we consider this a bug in the MIPS ABI, and do |
| 6185 | not check for overflow here. */ |
| 6186 | } |
| 6187 | break; |
| 6188 | |
| 6189 | case R_MIPS_LITERAL: |
| 6190 | case R_MICROMIPS_LITERAL: |
| 6191 | /* Because we don't merge literal sections, we can handle this |
| 6192 | just like R_MIPS_GPREL16. In the long run, we should merge |
| 6193 | shared literals, and then we will need to additional work |
| 6194 | here. */ |
| 6195 | |
| 6196 | /* Fall through. */ |
| 6197 | |
| 6198 | case R_MIPS16_GPREL: |
| 6199 | /* The R_MIPS16_GPREL performs the same calculation as |
| 6200 | R_MIPS_GPREL16, but stores the relocated bits in a different |
| 6201 | order. We don't need to do anything special here; the |
| 6202 | differences are handled in mips_elf_perform_relocation. */ |
| 6203 | case R_MIPS_GPREL16: |
| 6204 | case R_MICROMIPS_GPREL7_S2: |
| 6205 | case R_MICROMIPS_GPREL16: |
| 6206 | /* Only sign-extend the addend if it was extracted from the |
| 6207 | instruction. If the addend was separate, leave it alone, |
| 6208 | otherwise we may lose significant bits. */ |
| 6209 | if (howto->partial_inplace) |
| 6210 | addend = _bfd_mips_elf_sign_extend (addend, 16); |
| 6211 | value = symbol + addend - gp; |
| 6212 | /* If the symbol was local, any earlier relocatable links will |
| 6213 | have adjusted its addend with the gp offset, so compensate |
| 6214 | for that now. Don't do it for symbols forced local in this |
| 6215 | link, though, since they won't have had the gp offset applied |
| 6216 | to them before. */ |
| 6217 | if (was_local_p) |
| 6218 | value += gp0; |
| 6219 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6220 | overflowed_p = mips_elf_overflow_p (value, 16); |
| 6221 | break; |
| 6222 | |
| 6223 | case R_MIPS16_GOT16: |
| 6224 | case R_MIPS16_CALL16: |
| 6225 | case R_MIPS_GOT16: |
| 6226 | case R_MIPS_CALL16: |
| 6227 | case R_MICROMIPS_GOT16: |
| 6228 | case R_MICROMIPS_CALL16: |
| 6229 | /* VxWorks does not have separate local and global semantics for |
| 6230 | R_MIPS*_GOT16; every relocation evaluates to "G". */ |
| 6231 | if (!htab->is_vxworks && local_p) |
| 6232 | { |
| 6233 | value = mips_elf_got16_entry (abfd, input_bfd, info, |
| 6234 | symbol + addend, !was_local_p); |
| 6235 | if (value == MINUS_ONE) |
| 6236 | return bfd_reloc_outofrange; |
| 6237 | value |
| 6238 | = mips_elf_got_offset_from_index (info, abfd, input_bfd, value); |
| 6239 | overflowed_p = mips_elf_overflow_p (value, 16); |
| 6240 | break; |
| 6241 | } |
| 6242 | |
| 6243 | /* Fall through. */ |
| 6244 | |
| 6245 | case R_MIPS_TLS_GD: |
| 6246 | case R_MIPS_TLS_GOTTPREL: |
| 6247 | case R_MIPS_TLS_LDM: |
| 6248 | case R_MIPS_GOT_DISP: |
| 6249 | case R_MIPS16_TLS_GD: |
| 6250 | case R_MIPS16_TLS_GOTTPREL: |
| 6251 | case R_MIPS16_TLS_LDM: |
| 6252 | case R_MICROMIPS_TLS_GD: |
| 6253 | case R_MICROMIPS_TLS_GOTTPREL: |
| 6254 | case R_MICROMIPS_TLS_LDM: |
| 6255 | case R_MICROMIPS_GOT_DISP: |
| 6256 | value = g; |
| 6257 | overflowed_p = mips_elf_overflow_p (value, 16); |
| 6258 | break; |
| 6259 | |
| 6260 | case R_MIPS_GPREL32: |
| 6261 | value = (addend + symbol + gp0 - gp); |
| 6262 | if (!save_addend) |
| 6263 | value &= howto->dst_mask; |
| 6264 | break; |
| 6265 | |
| 6266 | case R_MIPS_PC16: |
| 6267 | case R_MIPS_GNU_REL16_S2: |
| 6268 | if (howto->partial_inplace) |
| 6269 | addend = _bfd_mips_elf_sign_extend (addend, 18); |
| 6270 | |
| 6271 | /* No need to exclude weak undefined symbols here as they resolve |
| 6272 | to 0 and never set `*cross_mode_jump_p', so this alignment check |
| 6273 | will never trigger for them. */ |
| 6274 | if (*cross_mode_jump_p |
| 6275 | ? ((symbol + addend) & 3) != 1 |
| 6276 | : ((symbol + addend) & 3) != 0) |
| 6277 | return bfd_reloc_outofrange; |
| 6278 | |
| 6279 | value = symbol + addend - p; |
| 6280 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6281 | overflowed_p = mips_elf_overflow_p (value, 18); |
| 6282 | value >>= howto->rightshift; |
| 6283 | value &= howto->dst_mask; |
| 6284 | break; |
| 6285 | |
| 6286 | case R_MIPS16_PC16_S1: |
| 6287 | if (howto->partial_inplace) |
| 6288 | addend = _bfd_mips_elf_sign_extend (addend, 17); |
| 6289 | |
| 6290 | if ((was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6291 | && (*cross_mode_jump_p |
| 6292 | ? ((symbol + addend) & 3) != 0 |
| 6293 | : ((symbol + addend) & 1) == 0)) |
| 6294 | return bfd_reloc_outofrange; |
| 6295 | |
| 6296 | value = symbol + addend - p; |
| 6297 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6298 | overflowed_p = mips_elf_overflow_p (value, 17); |
| 6299 | value >>= howto->rightshift; |
| 6300 | value &= howto->dst_mask; |
| 6301 | break; |
| 6302 | |
| 6303 | case R_MIPS_PC21_S2: |
| 6304 | if (howto->partial_inplace) |
| 6305 | addend = _bfd_mips_elf_sign_extend (addend, 23); |
| 6306 | |
| 6307 | if ((symbol + addend) & 3) |
| 6308 | return bfd_reloc_outofrange; |
| 6309 | |
| 6310 | value = symbol + addend - p; |
| 6311 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6312 | overflowed_p = mips_elf_overflow_p (value, 23); |
| 6313 | value >>= howto->rightshift; |
| 6314 | value &= howto->dst_mask; |
| 6315 | break; |
| 6316 | |
| 6317 | case R_MIPS_PC26_S2: |
| 6318 | if (howto->partial_inplace) |
| 6319 | addend = _bfd_mips_elf_sign_extend (addend, 28); |
| 6320 | |
| 6321 | if ((symbol + addend) & 3) |
| 6322 | return bfd_reloc_outofrange; |
| 6323 | |
| 6324 | value = symbol + addend - p; |
| 6325 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6326 | overflowed_p = mips_elf_overflow_p (value, 28); |
| 6327 | value >>= howto->rightshift; |
| 6328 | value &= howto->dst_mask; |
| 6329 | break; |
| 6330 | |
| 6331 | case R_MIPS_PC18_S3: |
| 6332 | if (howto->partial_inplace) |
| 6333 | addend = _bfd_mips_elf_sign_extend (addend, 21); |
| 6334 | |
| 6335 | if ((symbol + addend) & 7) |
| 6336 | return bfd_reloc_outofrange; |
| 6337 | |
| 6338 | value = symbol + addend - ((p | 7) ^ 7); |
| 6339 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6340 | overflowed_p = mips_elf_overflow_p (value, 21); |
| 6341 | value >>= howto->rightshift; |
| 6342 | value &= howto->dst_mask; |
| 6343 | break; |
| 6344 | |
| 6345 | case R_MIPS_PC19_S2: |
| 6346 | if (howto->partial_inplace) |
| 6347 | addend = _bfd_mips_elf_sign_extend (addend, 21); |
| 6348 | |
| 6349 | if ((symbol + addend) & 3) |
| 6350 | return bfd_reloc_outofrange; |
| 6351 | |
| 6352 | value = symbol + addend - p; |
| 6353 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6354 | overflowed_p = mips_elf_overflow_p (value, 21); |
| 6355 | value >>= howto->rightshift; |
| 6356 | value &= howto->dst_mask; |
| 6357 | break; |
| 6358 | |
| 6359 | case R_MIPS_PCHI16: |
| 6360 | value = mips_elf_high (symbol + addend - p); |
| 6361 | value &= howto->dst_mask; |
| 6362 | break; |
| 6363 | |
| 6364 | case R_MIPS_PCLO16: |
| 6365 | if (howto->partial_inplace) |
| 6366 | addend = _bfd_mips_elf_sign_extend (addend, 16); |
| 6367 | value = symbol + addend - p; |
| 6368 | value &= howto->dst_mask; |
| 6369 | break; |
| 6370 | |
| 6371 | case R_MICROMIPS_PC7_S1: |
| 6372 | if (howto->partial_inplace) |
| 6373 | addend = _bfd_mips_elf_sign_extend (addend, 8); |
| 6374 | |
| 6375 | if ((was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6376 | && (*cross_mode_jump_p |
| 6377 | ? ((symbol + addend + 2) & 3) != 0 |
| 6378 | : ((symbol + addend + 2) & 1) == 0)) |
| 6379 | return bfd_reloc_outofrange; |
| 6380 | |
| 6381 | value = symbol + addend - p; |
| 6382 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6383 | overflowed_p = mips_elf_overflow_p (value, 8); |
| 6384 | value >>= howto->rightshift; |
| 6385 | value &= howto->dst_mask; |
| 6386 | break; |
| 6387 | |
| 6388 | case R_MICROMIPS_PC10_S1: |
| 6389 | if (howto->partial_inplace) |
| 6390 | addend = _bfd_mips_elf_sign_extend (addend, 11); |
| 6391 | |
| 6392 | if ((was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6393 | && (*cross_mode_jump_p |
| 6394 | ? ((symbol + addend + 2) & 3) != 0 |
| 6395 | : ((symbol + addend + 2) & 1) == 0)) |
| 6396 | return bfd_reloc_outofrange; |
| 6397 | |
| 6398 | value = symbol + addend - p; |
| 6399 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6400 | overflowed_p = mips_elf_overflow_p (value, 11); |
| 6401 | value >>= howto->rightshift; |
| 6402 | value &= howto->dst_mask; |
| 6403 | break; |
| 6404 | |
| 6405 | case R_MICROMIPS_PC16_S1: |
| 6406 | if (howto->partial_inplace) |
| 6407 | addend = _bfd_mips_elf_sign_extend (addend, 17); |
| 6408 | |
| 6409 | if ((was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6410 | && (*cross_mode_jump_p |
| 6411 | ? ((symbol + addend) & 3) != 0 |
| 6412 | : ((symbol + addend) & 1) == 0)) |
| 6413 | return bfd_reloc_outofrange; |
| 6414 | |
| 6415 | value = symbol + addend - p; |
| 6416 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6417 | overflowed_p = mips_elf_overflow_p (value, 17); |
| 6418 | value >>= howto->rightshift; |
| 6419 | value &= howto->dst_mask; |
| 6420 | break; |
| 6421 | |
| 6422 | case R_MICROMIPS_PC23_S2: |
| 6423 | if (howto->partial_inplace) |
| 6424 | addend = _bfd_mips_elf_sign_extend (addend, 25); |
| 6425 | value = symbol + addend - ((p | 3) ^ 3); |
| 6426 | if (was_local_p || h->root.root.type != bfd_link_hash_undefweak) |
| 6427 | overflowed_p = mips_elf_overflow_p (value, 25); |
| 6428 | value >>= howto->rightshift; |
| 6429 | value &= howto->dst_mask; |
| 6430 | break; |
| 6431 | |
| 6432 | case R_MIPS_GOT_HI16: |
| 6433 | case R_MIPS_CALL_HI16: |
| 6434 | case R_MICROMIPS_GOT_HI16: |
| 6435 | case R_MICROMIPS_CALL_HI16: |
| 6436 | /* We're allowed to handle these two relocations identically. |
| 6437 | The dynamic linker is allowed to handle the CALL relocations |
| 6438 | differently by creating a lazy evaluation stub. */ |
| 6439 | value = g; |
| 6440 | value = mips_elf_high (value); |
| 6441 | value &= howto->dst_mask; |
| 6442 | break; |
| 6443 | |
| 6444 | case R_MIPS_GOT_LO16: |
| 6445 | case R_MIPS_CALL_LO16: |
| 6446 | case R_MICROMIPS_GOT_LO16: |
| 6447 | case R_MICROMIPS_CALL_LO16: |
| 6448 | value = g & howto->dst_mask; |
| 6449 | break; |
| 6450 | |
| 6451 | case R_MIPS_GOT_PAGE: |
| 6452 | case R_MICROMIPS_GOT_PAGE: |
| 6453 | value = mips_elf_got_page (abfd, input_bfd, info, symbol + addend, NULL); |
| 6454 | if (value == MINUS_ONE) |
| 6455 | return bfd_reloc_outofrange; |
| 6456 | value = mips_elf_got_offset_from_index (info, abfd, input_bfd, value); |
| 6457 | overflowed_p = mips_elf_overflow_p (value, 16); |
| 6458 | break; |
| 6459 | |
| 6460 | case R_MIPS_GOT_OFST: |
| 6461 | case R_MICROMIPS_GOT_OFST: |
| 6462 | if (local_p) |
| 6463 | mips_elf_got_page (abfd, input_bfd, info, symbol + addend, &value); |
| 6464 | else |
| 6465 | value = addend; |
| 6466 | overflowed_p = mips_elf_overflow_p (value, 16); |
| 6467 | break; |
| 6468 | |
| 6469 | case R_MIPS_SUB: |
| 6470 | case R_MICROMIPS_SUB: |
| 6471 | value = symbol - addend; |
| 6472 | value &= howto->dst_mask; |
| 6473 | break; |
| 6474 | |
| 6475 | case R_MIPS_HIGHER: |
| 6476 | case R_MICROMIPS_HIGHER: |
| 6477 | value = mips_elf_higher (addend + symbol); |
| 6478 | value &= howto->dst_mask; |
| 6479 | break; |
| 6480 | |
| 6481 | case R_MIPS_HIGHEST: |
| 6482 | case R_MICROMIPS_HIGHEST: |
| 6483 | value = mips_elf_highest (addend + symbol); |
| 6484 | value &= howto->dst_mask; |
| 6485 | break; |
| 6486 | |
| 6487 | case R_MIPS_SCN_DISP: |
| 6488 | case R_MICROMIPS_SCN_DISP: |
| 6489 | value = symbol + addend - sec->output_offset; |
| 6490 | value &= howto->dst_mask; |
| 6491 | break; |
| 6492 | |
| 6493 | case R_MIPS_JALR: |
| 6494 | case R_MICROMIPS_JALR: |
| 6495 | /* This relocation is only a hint. In some cases, we optimize |
| 6496 | it into a bal instruction. But we don't try to optimize |
| 6497 | when the symbol does not resolve locally. */ |
| 6498 | if (h != NULL && !SYMBOL_CALLS_LOCAL (info, &h->root)) |
| 6499 | return bfd_reloc_continue; |
| 6500 | /* We can't optimize cross-mode jumps either. */ |
| 6501 | if (*cross_mode_jump_p) |
| 6502 | return bfd_reloc_continue; |
| 6503 | value = symbol + addend; |
| 6504 | /* Neither we can non-instruction-aligned targets. */ |
| 6505 | if (r_type == R_MIPS_JALR ? (value & 3) != 0 : (value & 1) == 0) |
| 6506 | return bfd_reloc_continue; |
| 6507 | break; |
| 6508 | |
| 6509 | case R_MIPS_PJUMP: |
| 6510 | case R_MIPS_GNU_VTINHERIT: |
| 6511 | case R_MIPS_GNU_VTENTRY: |
| 6512 | /* We don't do anything with these at present. */ |
| 6513 | return bfd_reloc_continue; |
| 6514 | |
| 6515 | default: |
| 6516 | /* An unrecognized relocation type. */ |
| 6517 | return bfd_reloc_notsupported; |
| 6518 | } |
| 6519 | |
| 6520 | /* Store the VALUE for our caller. */ |
| 6521 | *valuep = value; |
| 6522 | return overflowed_p ? bfd_reloc_overflow : bfd_reloc_ok; |
| 6523 | } |
| 6524 | |
| 6525 | /* It has been determined that the result of the RELOCATION is the |
| 6526 | VALUE. Use HOWTO to place VALUE into the output file at the |
| 6527 | appropriate position. The SECTION is the section to which the |
| 6528 | relocation applies. |
| 6529 | CROSS_MODE_JUMP_P is true if the relocation field |
| 6530 | is a MIPS16 or microMIPS jump to standard MIPS code, or vice versa. |
| 6531 | |
| 6532 | Returns FALSE if anything goes wrong. */ |
| 6533 | |
| 6534 | static bfd_boolean |
| 6535 | mips_elf_perform_relocation (struct bfd_link_info *info, |
| 6536 | reloc_howto_type *howto, |
| 6537 | const Elf_Internal_Rela *relocation, |
| 6538 | bfd_vma value, bfd *input_bfd, |
| 6539 | asection *input_section, bfd_byte *contents, |
| 6540 | bfd_boolean cross_mode_jump_p) |
| 6541 | { |
| 6542 | bfd_vma x; |
| 6543 | bfd_byte *location; |
| 6544 | int r_type = ELF_R_TYPE (input_bfd, relocation->r_info); |
| 6545 | |
| 6546 | /* Figure out where the relocation is occurring. */ |
| 6547 | location = contents + relocation->r_offset; |
| 6548 | |
| 6549 | _bfd_mips_elf_reloc_unshuffle (input_bfd, r_type, FALSE, location); |
| 6550 | |
| 6551 | /* Obtain the current value. */ |
| 6552 | x = mips_elf_obtain_contents (howto, relocation, input_bfd, contents); |
| 6553 | |
| 6554 | /* Clear the field we are setting. */ |
| 6555 | x &= ~howto->dst_mask; |
| 6556 | |
| 6557 | /* Set the field. */ |
| 6558 | x |= (value & howto->dst_mask); |
| 6559 | |
| 6560 | /* Detect incorrect JALX usage. If required, turn JAL or BAL into JALX. */ |
| 6561 | if (!cross_mode_jump_p && jal_reloc_p (r_type)) |
| 6562 | { |
| 6563 | bfd_vma opcode = x >> 26; |
| 6564 | |
| 6565 | if (r_type == R_MIPS16_26 ? opcode == 0x7 |
| 6566 | : r_type == R_MICROMIPS_26_S1 ? opcode == 0x3c |
| 6567 | : opcode == 0x1d) |
| 6568 | { |
| 6569 | info->callbacks->einfo |
| 6570 | (_("%X%H: unsupported JALX to the same ISA mode\n"), |
| 6571 | input_bfd, input_section, relocation->r_offset); |
| 6572 | return TRUE; |
| 6573 | } |
| 6574 | } |
| 6575 | if (cross_mode_jump_p && jal_reloc_p (r_type)) |
| 6576 | { |
| 6577 | bfd_boolean ok; |
| 6578 | bfd_vma opcode = x >> 26; |
| 6579 | bfd_vma jalx_opcode; |
| 6580 | |
| 6581 | /* Check to see if the opcode is already JAL or JALX. */ |
| 6582 | if (r_type == R_MIPS16_26) |
| 6583 | { |
| 6584 | ok = ((opcode == 0x6) || (opcode == 0x7)); |
| 6585 | jalx_opcode = 0x7; |
| 6586 | } |
| 6587 | else if (r_type == R_MICROMIPS_26_S1) |
| 6588 | { |
| 6589 | ok = ((opcode == 0x3d) || (opcode == 0x3c)); |
| 6590 | jalx_opcode = 0x3c; |
| 6591 | } |
| 6592 | else |
| 6593 | { |
| 6594 | ok = ((opcode == 0x3) || (opcode == 0x1d)); |
| 6595 | jalx_opcode = 0x1d; |
| 6596 | } |
| 6597 | |
| 6598 | /* If the opcode is not JAL or JALX, there's a problem. We cannot |
| 6599 | convert J or JALS to JALX. */ |
| 6600 | if (!ok) |
| 6601 | { |
| 6602 | info->callbacks->einfo |
| 6603 | (_("%X%H: unsupported jump between ISA modes; " |
| 6604 | "consider recompiling with interlinking enabled\n"), |
| 6605 | input_bfd, input_section, relocation->r_offset); |
| 6606 | return TRUE; |
| 6607 | } |
| 6608 | |
| 6609 | /* Make this the JALX opcode. */ |
| 6610 | x = (x & ~(0x3fu << 26)) | (jalx_opcode << 26); |
| 6611 | } |
| 6612 | else if (cross_mode_jump_p && b_reloc_p (r_type)) |
| 6613 | { |
| 6614 | bfd_boolean ok = FALSE; |
| 6615 | bfd_vma opcode = x >> 16; |
| 6616 | bfd_vma jalx_opcode = 0; |
| 6617 | bfd_vma sign_bit = 0; |
| 6618 | bfd_vma addr; |
| 6619 | bfd_vma dest; |
| 6620 | |
| 6621 | if (r_type == R_MICROMIPS_PC16_S1) |
| 6622 | { |
| 6623 | ok = opcode == 0x4060; |
| 6624 | jalx_opcode = 0x3c; |
| 6625 | sign_bit = 0x10000; |
| 6626 | value <<= 1; |
| 6627 | } |
| 6628 | else if (r_type == R_MIPS_PC16 || r_type == R_MIPS_GNU_REL16_S2) |
| 6629 | { |
| 6630 | ok = opcode == 0x411; |
| 6631 | jalx_opcode = 0x1d; |
| 6632 | sign_bit = 0x20000; |
| 6633 | value <<= 2; |
| 6634 | } |
| 6635 | |
| 6636 | if (ok && !bfd_link_pic (info)) |
| 6637 | { |
| 6638 | addr = (input_section->output_section->vma |
| 6639 | + input_section->output_offset |
| 6640 | + relocation->r_offset |
| 6641 | + 4); |
| 6642 | dest = (addr |
| 6643 | + (((value & ((sign_bit << 1) - 1)) ^ sign_bit) - sign_bit)); |
| 6644 | |
| 6645 | if ((addr >> 28) << 28 != (dest >> 28) << 28) |
| 6646 | { |
| 6647 | info->callbacks->einfo |
| 6648 | (_("%X%H: cannot convert branch between ISA modes " |
| 6649 | "to JALX: relocation out of range\n"), |
| 6650 | input_bfd, input_section, relocation->r_offset); |
| 6651 | return TRUE; |
| 6652 | } |
| 6653 | |
| 6654 | /* Make this the JALX opcode. */ |
| 6655 | x = ((dest >> 2) & 0x3ffffff) | jalx_opcode << 26; |
| 6656 | } |
| 6657 | else if (!mips_elf_hash_table (info)->ignore_branch_isa) |
| 6658 | { |
| 6659 | info->callbacks->einfo |
| 6660 | (_("%X%H: unsupported branch between ISA modes\n"), |
| 6661 | input_bfd, input_section, relocation->r_offset); |
| 6662 | return TRUE; |
| 6663 | } |
| 6664 | } |
| 6665 | |
| 6666 | /* Try converting JAL to BAL and J(AL)R to B(AL), if the target is in |
| 6667 | range. */ |
| 6668 | if (!bfd_link_relocatable (info) |
| 6669 | && !cross_mode_jump_p |
| 6670 | && ((JAL_TO_BAL_P (input_bfd) |
| 6671 | && r_type == R_MIPS_26 |
| 6672 | && (x >> 26) == 0x3) /* jal addr */ |
| 6673 | || (JALR_TO_BAL_P (input_bfd) |
| 6674 | && r_type == R_MIPS_JALR |
| 6675 | && x == 0x0320f809) /* jalr t9 */ |
| 6676 | || (JR_TO_B_P (input_bfd) |
| 6677 | && r_type == R_MIPS_JALR |
| 6678 | && (x & ~1) == 0x03200008))) /* jr t9 / jalr zero, t9 */ |
| 6679 | { |
| 6680 | bfd_vma addr; |
| 6681 | bfd_vma dest; |
| 6682 | bfd_signed_vma off; |
| 6683 | |
| 6684 | addr = (input_section->output_section->vma |
| 6685 | + input_section->output_offset |
| 6686 | + relocation->r_offset |
| 6687 | + 4); |
| 6688 | if (r_type == R_MIPS_26) |
| 6689 | dest = (value << 2) | ((addr >> 28) << 28); |
| 6690 | else |
| 6691 | dest = value; |
| 6692 | off = dest - addr; |
| 6693 | if (off <= 0x1ffff && off >= -0x20000) |
| 6694 | { |
| 6695 | if ((x & ~1) == 0x03200008) /* jr t9 / jalr zero, t9 */ |
| 6696 | x = 0x10000000 | (((bfd_vma) off >> 2) & 0xffff); /* b addr */ |
| 6697 | else |
| 6698 | x = 0x04110000 | (((bfd_vma) off >> 2) & 0xffff); /* bal addr */ |
| 6699 | } |
| 6700 | } |
| 6701 | |
| 6702 | /* Put the value into the output. */ |
| 6703 | mips_elf_store_contents (howto, relocation, input_bfd, contents, x); |
| 6704 | |
| 6705 | _bfd_mips_elf_reloc_shuffle (input_bfd, r_type, !bfd_link_relocatable (info), |
| 6706 | location); |
| 6707 | |
| 6708 | return TRUE; |
| 6709 | } |
| 6710 | \f |
| 6711 | /* Create a rel.dyn relocation for the dynamic linker to resolve. REL |
| 6712 | is the original relocation, which is now being transformed into a |
| 6713 | dynamic relocation. The ADDENDP is adjusted if necessary; the |
| 6714 | caller should store the result in place of the original addend. */ |
| 6715 | |
| 6716 | static bfd_boolean |
| 6717 | mips_elf_create_dynamic_relocation (bfd *output_bfd, |
| 6718 | struct bfd_link_info *info, |
| 6719 | const Elf_Internal_Rela *rel, |
| 6720 | struct mips_elf_link_hash_entry *h, |
| 6721 | asection *sec, bfd_vma symbol, |
| 6722 | bfd_vma *addendp, asection *input_section) |
| 6723 | { |
| 6724 | Elf_Internal_Rela outrel[3]; |
| 6725 | asection *sreloc; |
| 6726 | bfd *dynobj; |
| 6727 | int r_type; |
| 6728 | long indx; |
| 6729 | bfd_boolean defined_p; |
| 6730 | struct mips_elf_link_hash_table *htab; |
| 6731 | |
| 6732 | htab = mips_elf_hash_table (info); |
| 6733 | BFD_ASSERT (htab != NULL); |
| 6734 | |
| 6735 | r_type = ELF_R_TYPE (output_bfd, rel->r_info); |
| 6736 | dynobj = elf_hash_table (info)->dynobj; |
| 6737 | sreloc = mips_elf_rel_dyn_section (info, FALSE); |
| 6738 | BFD_ASSERT (sreloc != NULL); |
| 6739 | BFD_ASSERT (sreloc->contents != NULL); |
| 6740 | BFD_ASSERT (sreloc->reloc_count * MIPS_ELF_REL_SIZE (output_bfd) |
| 6741 | < sreloc->size); |
| 6742 | |
| 6743 | outrel[0].r_offset = |
| 6744 | _bfd_elf_section_offset (output_bfd, info, input_section, rel[0].r_offset); |
| 6745 | if (ABI_64_P (output_bfd)) |
| 6746 | { |
| 6747 | outrel[1].r_offset = |
| 6748 | _bfd_elf_section_offset (output_bfd, info, input_section, rel[1].r_offset); |
| 6749 | outrel[2].r_offset = |
| 6750 | _bfd_elf_section_offset (output_bfd, info, input_section, rel[2].r_offset); |
| 6751 | } |
| 6752 | |
| 6753 | if (outrel[0].r_offset == MINUS_ONE) |
| 6754 | /* The relocation field has been deleted. */ |
| 6755 | return TRUE; |
| 6756 | |
| 6757 | if (outrel[0].r_offset == MINUS_TWO) |
| 6758 | { |
| 6759 | /* The relocation field has been converted into a relative value of |
| 6760 | some sort. Functions like _bfd_elf_write_section_eh_frame expect |
| 6761 | the field to be fully relocated, so add in the symbol's value. */ |
| 6762 | *addendp += symbol; |
| 6763 | return TRUE; |
| 6764 | } |
| 6765 | |
| 6766 | /* We must now calculate the dynamic symbol table index to use |
| 6767 | in the relocation. */ |
| 6768 | if (h != NULL && ! SYMBOL_REFERENCES_LOCAL (info, &h->root)) |
| 6769 | { |
| 6770 | BFD_ASSERT (htab->is_vxworks || h->global_got_area != GGA_NONE); |
| 6771 | indx = h->root.dynindx; |
| 6772 | if (SGI_COMPAT (output_bfd)) |
| 6773 | defined_p = h->root.def_regular; |
| 6774 | else |
| 6775 | /* ??? glibc's ld.so just adds the final GOT entry to the |
| 6776 | relocation field. It therefore treats relocs against |
| 6777 | defined symbols in the same way as relocs against |
| 6778 | undefined symbols. */ |
| 6779 | defined_p = FALSE; |
| 6780 | } |
| 6781 | else |
| 6782 | { |
| 6783 | if (sec != NULL && bfd_is_abs_section (sec)) |
| 6784 | indx = 0; |
| 6785 | else if (sec == NULL || sec->owner == NULL) |
| 6786 | { |
| 6787 | bfd_set_error (bfd_error_bad_value); |
| 6788 | return FALSE; |
| 6789 | } |
| 6790 | else |
| 6791 | { |
| 6792 | indx = elf_section_data (sec->output_section)->dynindx; |
| 6793 | if (indx == 0) |
| 6794 | { |
| 6795 | asection *osec = htab->root.text_index_section; |
| 6796 | indx = elf_section_data (osec)->dynindx; |
| 6797 | } |
| 6798 | if (indx == 0) |
| 6799 | abort (); |
| 6800 | } |
| 6801 | |
| 6802 | /* Instead of generating a relocation using the section |
| 6803 | symbol, we may as well make it a fully relative |
| 6804 | relocation. We want to avoid generating relocations to |
| 6805 | local symbols because we used to generate them |
| 6806 | incorrectly, without adding the original symbol value, |
| 6807 | which is mandated by the ABI for section symbols. In |
| 6808 | order to give dynamic loaders and applications time to |
| 6809 | phase out the incorrect use, we refrain from emitting |
| 6810 | section-relative relocations. It's not like they're |
| 6811 | useful, after all. This should be a bit more efficient |
| 6812 | as well. */ |
| 6813 | /* ??? Although this behavior is compatible with glibc's ld.so, |
| 6814 | the ABI says that relocations against STN_UNDEF should have |
| 6815 | a symbol value of 0. Irix rld honors this, so relocations |
| 6816 | against STN_UNDEF have no effect. */ |
| 6817 | if (!SGI_COMPAT (output_bfd)) |
| 6818 | indx = 0; |
| 6819 | defined_p = TRUE; |
| 6820 | } |
| 6821 | |
| 6822 | /* If the relocation was previously an absolute relocation and |
| 6823 | this symbol will not be referred to by the relocation, we must |
| 6824 | adjust it by the value we give it in the dynamic symbol table. |
| 6825 | Otherwise leave the job up to the dynamic linker. */ |
| 6826 | if (defined_p && r_type != R_MIPS_REL32) |
| 6827 | *addendp += symbol; |
| 6828 | |
| 6829 | if (htab->is_vxworks) |
| 6830 | /* VxWorks uses non-relative relocations for this. */ |
| 6831 | outrel[0].r_info = ELF32_R_INFO (indx, R_MIPS_32); |
| 6832 | else |
| 6833 | /* The relocation is always an REL32 relocation because we don't |
| 6834 | know where the shared library will wind up at load-time. */ |
| 6835 | outrel[0].r_info = ELF_R_INFO (output_bfd, (unsigned long) indx, |
| 6836 | R_MIPS_REL32); |
| 6837 | |
| 6838 | /* For strict adherence to the ABI specification, we should |
| 6839 | generate a R_MIPS_64 relocation record by itself before the |
| 6840 | _REL32/_64 record as well, such that the addend is read in as |
| 6841 | a 64-bit value (REL32 is a 32-bit relocation, after all). |
| 6842 | However, since none of the existing ELF64 MIPS dynamic |
| 6843 | loaders seems to care, we don't waste space with these |
| 6844 | artificial relocations. If this turns out to not be true, |
| 6845 | mips_elf_allocate_dynamic_relocation() should be tweaked so |
| 6846 | as to make room for a pair of dynamic relocations per |
| 6847 | invocation if ABI_64_P, and here we should generate an |
| 6848 | additional relocation record with R_MIPS_64 by itself for a |
| 6849 | NULL symbol before this relocation record. */ |
| 6850 | outrel[1].r_info = ELF_R_INFO (output_bfd, 0, |
| 6851 | ABI_64_P (output_bfd) |
| 6852 | ? R_MIPS_64 |
| 6853 | : R_MIPS_NONE); |
| 6854 | outrel[2].r_info = ELF_R_INFO (output_bfd, 0, R_MIPS_NONE); |
| 6855 | |
| 6856 | /* Adjust the output offset of the relocation to reference the |
| 6857 | correct location in the output file. */ |
| 6858 | outrel[0].r_offset += (input_section->output_section->vma |
| 6859 | + input_section->output_offset); |
| 6860 | outrel[1].r_offset += (input_section->output_section->vma |
| 6861 | + input_section->output_offset); |
| 6862 | outrel[2].r_offset += (input_section->output_section->vma |
| 6863 | + input_section->output_offset); |
| 6864 | |
| 6865 | /* Put the relocation back out. We have to use the special |
| 6866 | relocation outputter in the 64-bit case since the 64-bit |
| 6867 | relocation format is non-standard. */ |
| 6868 | if (ABI_64_P (output_bfd)) |
| 6869 | { |
| 6870 | (*get_elf_backend_data (output_bfd)->s->swap_reloc_out) |
| 6871 | (output_bfd, &outrel[0], |
| 6872 | (sreloc->contents |
| 6873 | + sreloc->reloc_count * sizeof (Elf64_Mips_External_Rel))); |
| 6874 | } |
| 6875 | else if (htab->is_vxworks) |
| 6876 | { |
| 6877 | /* VxWorks uses RELA rather than REL dynamic relocations. */ |
| 6878 | outrel[0].r_addend = *addendp; |
| 6879 | bfd_elf32_swap_reloca_out |
| 6880 | (output_bfd, &outrel[0], |
| 6881 | (sreloc->contents |
| 6882 | + sreloc->reloc_count * sizeof (Elf32_External_Rela))); |
| 6883 | } |
| 6884 | else |
| 6885 | bfd_elf32_swap_reloc_out |
| 6886 | (output_bfd, &outrel[0], |
| 6887 | (sreloc->contents + sreloc->reloc_count * sizeof (Elf32_External_Rel))); |
| 6888 | |
| 6889 | /* We've now added another relocation. */ |
| 6890 | ++sreloc->reloc_count; |
| 6891 | |
| 6892 | /* Make sure the output section is writable. The dynamic linker |
| 6893 | will be writing to it. */ |
| 6894 | elf_section_data (input_section->output_section)->this_hdr.sh_flags |
| 6895 | |= SHF_WRITE; |
| 6896 | |
| 6897 | /* On IRIX5, make an entry of compact relocation info. */ |
| 6898 | if (IRIX_COMPAT (output_bfd) == ict_irix5) |
| 6899 | { |
| 6900 | asection *scpt = bfd_get_linker_section (dynobj, ".compact_rel"); |
| 6901 | bfd_byte *cr; |
| 6902 | |
| 6903 | if (scpt) |
| 6904 | { |
| 6905 | Elf32_crinfo cptrel; |
| 6906 | |
| 6907 | mips_elf_set_cr_format (cptrel, CRF_MIPS_LONG); |
| 6908 | cptrel.vaddr = (rel->r_offset |
| 6909 | + input_section->output_section->vma |
| 6910 | + input_section->output_offset); |
| 6911 | if (r_type == R_MIPS_REL32) |
| 6912 | mips_elf_set_cr_type (cptrel, CRT_MIPS_REL32); |
| 6913 | else |
| 6914 | mips_elf_set_cr_type (cptrel, CRT_MIPS_WORD); |
| 6915 | mips_elf_set_cr_dist2to (cptrel, 0); |
| 6916 | cptrel.konst = *addendp; |
| 6917 | |
| 6918 | cr = (scpt->contents |
| 6919 | + sizeof (Elf32_External_compact_rel)); |
| 6920 | mips_elf_set_cr_relvaddr (cptrel, 0); |
| 6921 | bfd_elf32_swap_crinfo_out (output_bfd, &cptrel, |
| 6922 | ((Elf32_External_crinfo *) cr |
| 6923 | + scpt->reloc_count)); |
| 6924 | ++scpt->reloc_count; |
| 6925 | } |
| 6926 | } |
| 6927 | |
| 6928 | /* If we've written this relocation for a readonly section, |
| 6929 | we need to set DF_TEXTREL again, so that we do not delete the |
| 6930 | DT_TEXTREL tag. */ |
| 6931 | if (MIPS_ELF_READONLY_SECTION (input_section)) |
| 6932 | info->flags |= DF_TEXTREL; |
| 6933 | |
| 6934 | return TRUE; |
| 6935 | } |
| 6936 | \f |
| 6937 | /* Return the MACH for a MIPS e_flags value. */ |
| 6938 | |
| 6939 | unsigned long |
| 6940 | _bfd_elf_mips_mach (flagword flags) |
| 6941 | { |
| 6942 | switch (flags & EF_MIPS_MACH) |
| 6943 | { |
| 6944 | case E_MIPS_MACH_3900: |
| 6945 | return bfd_mach_mips3900; |
| 6946 | |
| 6947 | case E_MIPS_MACH_4010: |
| 6948 | return bfd_mach_mips4010; |
| 6949 | |
| 6950 | case E_MIPS_MACH_4100: |
| 6951 | return bfd_mach_mips4100; |
| 6952 | |
| 6953 | case E_MIPS_MACH_4111: |
| 6954 | return bfd_mach_mips4111; |
| 6955 | |
| 6956 | case E_MIPS_MACH_4120: |
| 6957 | return bfd_mach_mips4120; |
| 6958 | |
| 6959 | case E_MIPS_MACH_4650: |
| 6960 | return bfd_mach_mips4650; |
| 6961 | |
| 6962 | case E_MIPS_MACH_5400: |
| 6963 | return bfd_mach_mips5400; |
| 6964 | |
| 6965 | case E_MIPS_MACH_5500: |
| 6966 | return bfd_mach_mips5500; |
| 6967 | |
| 6968 | case E_MIPS_MACH_5900: |
| 6969 | return bfd_mach_mips5900; |
| 6970 | |
| 6971 | case E_MIPS_MACH_9000: |
| 6972 | return bfd_mach_mips9000; |
| 6973 | |
| 6974 | case E_MIPS_MACH_SB1: |
| 6975 | return bfd_mach_mips_sb1; |
| 6976 | |
| 6977 | case E_MIPS_MACH_LS2E: |
| 6978 | return bfd_mach_mips_loongson_2e; |
| 6979 | |
| 6980 | case E_MIPS_MACH_LS2F: |
| 6981 | return bfd_mach_mips_loongson_2f; |
| 6982 | |
| 6983 | case E_MIPS_MACH_GS464: |
| 6984 | return bfd_mach_mips_gs464; |
| 6985 | |
| 6986 | case E_MIPS_MACH_GS464E: |
| 6987 | return bfd_mach_mips_gs464e; |
| 6988 | |
| 6989 | case E_MIPS_MACH_GS264E: |
| 6990 | return bfd_mach_mips_gs264e; |
| 6991 | |
| 6992 | case E_MIPS_MACH_OCTEON3: |
| 6993 | return bfd_mach_mips_octeon3; |
| 6994 | |
| 6995 | case E_MIPS_MACH_OCTEON2: |
| 6996 | return bfd_mach_mips_octeon2; |
| 6997 | |
| 6998 | case E_MIPS_MACH_OCTEON: |
| 6999 | return bfd_mach_mips_octeon; |
| 7000 | |
| 7001 | case E_MIPS_MACH_XLR: |
| 7002 | return bfd_mach_mips_xlr; |
| 7003 | |
| 7004 | case E_MIPS_MACH_IAMR2: |
| 7005 | return bfd_mach_mips_interaptiv_mr2; |
| 7006 | |
| 7007 | default: |
| 7008 | switch (flags & EF_MIPS_ARCH) |
| 7009 | { |
| 7010 | default: |
| 7011 | case E_MIPS_ARCH_1: |
| 7012 | return bfd_mach_mips3000; |
| 7013 | |
| 7014 | case E_MIPS_ARCH_2: |
| 7015 | return bfd_mach_mips6000; |
| 7016 | |
| 7017 | case E_MIPS_ARCH_3: |
| 7018 | return bfd_mach_mips4000; |
| 7019 | |
| 7020 | case E_MIPS_ARCH_4: |
| 7021 | return bfd_mach_mips8000; |
| 7022 | |
| 7023 | case E_MIPS_ARCH_5: |
| 7024 | return bfd_mach_mips5; |
| 7025 | |
| 7026 | case E_MIPS_ARCH_32: |
| 7027 | return bfd_mach_mipsisa32; |
| 7028 | |
| 7029 | case E_MIPS_ARCH_64: |
| 7030 | return bfd_mach_mipsisa64; |
| 7031 | |
| 7032 | case E_MIPS_ARCH_32R2: |
| 7033 | return bfd_mach_mipsisa32r2; |
| 7034 | |
| 7035 | case E_MIPS_ARCH_64R2: |
| 7036 | return bfd_mach_mipsisa64r2; |
| 7037 | |
| 7038 | case E_MIPS_ARCH_32R6: |
| 7039 | return bfd_mach_mipsisa32r6; |
| 7040 | |
| 7041 | case E_MIPS_ARCH_64R6: |
| 7042 | return bfd_mach_mipsisa64r6; |
| 7043 | } |
| 7044 | } |
| 7045 | |
| 7046 | return 0; |
| 7047 | } |
| 7048 | |
| 7049 | /* Return printable name for ABI. */ |
| 7050 | |
| 7051 | static INLINE char * |
| 7052 | elf_mips_abi_name (bfd *abfd) |
| 7053 | { |
| 7054 | flagword flags; |
| 7055 | |
| 7056 | flags = elf_elfheader (abfd)->e_flags; |
| 7057 | switch (flags & EF_MIPS_ABI) |
| 7058 | { |
| 7059 | case 0: |
| 7060 | if (ABI_N32_P (abfd)) |
| 7061 | return "N32"; |
| 7062 | else if (ABI_64_P (abfd)) |
| 7063 | return "64"; |
| 7064 | else |
| 7065 | return "none"; |
| 7066 | case E_MIPS_ABI_O32: |
| 7067 | return "O32"; |
| 7068 | case E_MIPS_ABI_O64: |
| 7069 | return "O64"; |
| 7070 | case E_MIPS_ABI_EABI32: |
| 7071 | return "EABI32"; |
| 7072 | case E_MIPS_ABI_EABI64: |
| 7073 | return "EABI64"; |
| 7074 | default: |
| 7075 | return "unknown abi"; |
| 7076 | } |
| 7077 | } |
| 7078 | \f |
| 7079 | /* MIPS ELF uses two common sections. One is the usual one, and the |
| 7080 | other is for small objects. All the small objects are kept |
| 7081 | together, and then referenced via the gp pointer, which yields |
| 7082 | faster assembler code. This is what we use for the small common |
| 7083 | section. This approach is copied from ecoff.c. */ |
| 7084 | static asection mips_elf_scom_section; |
| 7085 | static asymbol mips_elf_scom_symbol; |
| 7086 | static asymbol *mips_elf_scom_symbol_ptr; |
| 7087 | |
| 7088 | /* MIPS ELF also uses an acommon section, which represents an |
| 7089 | allocated common symbol which may be overridden by a |
| 7090 | definition in a shared library. */ |
| 7091 | static asection mips_elf_acom_section; |
| 7092 | static asymbol mips_elf_acom_symbol; |
| 7093 | static asymbol *mips_elf_acom_symbol_ptr; |
| 7094 | |
| 7095 | /* This is used for both the 32-bit and the 64-bit ABI. */ |
| 7096 | |
| 7097 | void |
| 7098 | _bfd_mips_elf_symbol_processing (bfd *abfd, asymbol *asym) |
| 7099 | { |
| 7100 | elf_symbol_type *elfsym; |
| 7101 | |
| 7102 | /* Handle the special MIPS section numbers that a symbol may use. */ |
| 7103 | elfsym = (elf_symbol_type *) asym; |
| 7104 | switch (elfsym->internal_elf_sym.st_shndx) |
| 7105 | { |
| 7106 | case SHN_MIPS_ACOMMON: |
| 7107 | /* This section is used in a dynamically linked executable file. |
| 7108 | It is an allocated common section. The dynamic linker can |
| 7109 | either resolve these symbols to something in a shared |
| 7110 | library, or it can just leave them here. For our purposes, |
| 7111 | we can consider these symbols to be in a new section. */ |
| 7112 | if (mips_elf_acom_section.name == NULL) |
| 7113 | { |
| 7114 | /* Initialize the acommon section. */ |
| 7115 | mips_elf_acom_section.name = ".acommon"; |
| 7116 | mips_elf_acom_section.flags = SEC_ALLOC; |
| 7117 | mips_elf_acom_section.output_section = &mips_elf_acom_section; |
| 7118 | mips_elf_acom_section.symbol = &mips_elf_acom_symbol; |
| 7119 | mips_elf_acom_section.symbol_ptr_ptr = &mips_elf_acom_symbol_ptr; |
| 7120 | mips_elf_acom_symbol.name = ".acommon"; |
| 7121 | mips_elf_acom_symbol.flags = BSF_SECTION_SYM; |
| 7122 | mips_elf_acom_symbol.section = &mips_elf_acom_section; |
| 7123 | mips_elf_acom_symbol_ptr = &mips_elf_acom_symbol; |
| 7124 | } |
| 7125 | asym->section = &mips_elf_acom_section; |
| 7126 | break; |
| 7127 | |
| 7128 | case SHN_COMMON: |
| 7129 | /* Common symbols less than the GP size are automatically |
| 7130 | treated as SHN_MIPS_SCOMMON symbols on IRIX5. */ |
| 7131 | if (asym->value > elf_gp_size (abfd) |
| 7132 | || ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_TLS |
| 7133 | || IRIX_COMPAT (abfd) == ict_irix6) |
| 7134 | break; |
| 7135 | /* Fall through. */ |
| 7136 | case SHN_MIPS_SCOMMON: |
| 7137 | if (mips_elf_scom_section.name == NULL) |
| 7138 | { |
| 7139 | /* Initialize the small common section. */ |
| 7140 | mips_elf_scom_section.name = ".scommon"; |
| 7141 | mips_elf_scom_section.flags = SEC_IS_COMMON; |
| 7142 | mips_elf_scom_section.output_section = &mips_elf_scom_section; |
| 7143 | mips_elf_scom_section.symbol = &mips_elf_scom_symbol; |
| 7144 | mips_elf_scom_section.symbol_ptr_ptr = &mips_elf_scom_symbol_ptr; |
| 7145 | mips_elf_scom_symbol.name = ".scommon"; |
| 7146 | mips_elf_scom_symbol.flags = BSF_SECTION_SYM; |
| 7147 | mips_elf_scom_symbol.section = &mips_elf_scom_section; |
| 7148 | mips_elf_scom_symbol_ptr = &mips_elf_scom_symbol; |
| 7149 | } |
| 7150 | asym->section = &mips_elf_scom_section; |
| 7151 | asym->value = elfsym->internal_elf_sym.st_size; |
| 7152 | break; |
| 7153 | |
| 7154 | case SHN_MIPS_SUNDEFINED: |
| 7155 | asym->section = bfd_und_section_ptr; |
| 7156 | break; |
| 7157 | |
| 7158 | case SHN_MIPS_TEXT: |
| 7159 | { |
| 7160 | asection *section = bfd_get_section_by_name (abfd, ".text"); |
| 7161 | |
| 7162 | if (section != NULL) |
| 7163 | { |
| 7164 | asym->section = section; |
| 7165 | /* MIPS_TEXT is a bit special, the address is not an offset |
| 7166 | to the base of the .text section. So subtract the section |
| 7167 | base address to make it an offset. */ |
| 7168 | asym->value -= section->vma; |
| 7169 | } |
| 7170 | } |
| 7171 | break; |
| 7172 | |
| 7173 | case SHN_MIPS_DATA: |
| 7174 | { |
| 7175 | asection *section = bfd_get_section_by_name (abfd, ".data"); |
| 7176 | |
| 7177 | if (section != NULL) |
| 7178 | { |
| 7179 | asym->section = section; |
| 7180 | /* MIPS_DATA is a bit special, the address is not an offset |
| 7181 | to the base of the .data section. So subtract the section |
| 7182 | base address to make it an offset. */ |
| 7183 | asym->value -= section->vma; |
| 7184 | } |
| 7185 | } |
| 7186 | break; |
| 7187 | } |
| 7188 | |
| 7189 | /* If this is an odd-valued function symbol, assume it's a MIPS16 |
| 7190 | or microMIPS one. */ |
| 7191 | if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_FUNC |
| 7192 | && (asym->value & 1) != 0) |
| 7193 | { |
| 7194 | asym->value--; |
| 7195 | if (MICROMIPS_P (abfd)) |
| 7196 | elfsym->internal_elf_sym.st_other |
| 7197 | = ELF_ST_SET_MICROMIPS (elfsym->internal_elf_sym.st_other); |
| 7198 | else |
| 7199 | elfsym->internal_elf_sym.st_other |
| 7200 | = ELF_ST_SET_MIPS16 (elfsym->internal_elf_sym.st_other); |
| 7201 | } |
| 7202 | } |
| 7203 | \f |
| 7204 | /* Implement elf_backend_eh_frame_address_size. This differs from |
| 7205 | the default in the way it handles EABI64. |
| 7206 | |
| 7207 | EABI64 was originally specified as an LP64 ABI, and that is what |
| 7208 | -mabi=eabi normally gives on a 64-bit target. However, gcc has |
| 7209 | historically accepted the combination of -mabi=eabi and -mlong32, |
| 7210 | and this ILP32 variation has become semi-official over time. |
| 7211 | Both forms use elf32 and have pointer-sized FDE addresses. |
| 7212 | |
| 7213 | If an EABI object was generated by GCC 4.0 or above, it will have |
| 7214 | an empty .gcc_compiled_longXX section, where XX is the size of longs |
| 7215 | in bits. Unfortunately, ILP32 objects generated by earlier compilers |
| 7216 | have no special marking to distinguish them from LP64 objects. |
| 7217 | |
| 7218 | We don't want users of the official LP64 ABI to be punished for the |
| 7219 | existence of the ILP32 variant, but at the same time, we don't want |
| 7220 | to mistakenly interpret pre-4.0 ILP32 objects as being LP64 objects. |
| 7221 | We therefore take the following approach: |
| 7222 | |
| 7223 | - If ABFD contains a .gcc_compiled_longXX section, use it to |
| 7224 | determine the pointer size. |
| 7225 | |
| 7226 | - Otherwise check the type of the first relocation. Assume that |
| 7227 | the LP64 ABI is being used if the relocation is of type R_MIPS_64. |
| 7228 | |
| 7229 | - Otherwise punt. |
| 7230 | |
| 7231 | The second check is enough to detect LP64 objects generated by pre-4.0 |
| 7232 | compilers because, in the kind of output generated by those compilers, |
| 7233 | the first relocation will be associated with either a CIE personality |
| 7234 | routine or an FDE start address. Furthermore, the compilers never |
| 7235 | used a special (non-pointer) encoding for this ABI. |
| 7236 | |
| 7237 | Checking the relocation type should also be safe because there is no |
| 7238 | reason to use R_MIPS_64 in an ILP32 object. Pre-4.0 compilers never |
| 7239 | did so. */ |
| 7240 | |
| 7241 | unsigned int |
| 7242 | _bfd_mips_elf_eh_frame_address_size (bfd *abfd, const asection *sec) |
| 7243 | { |
| 7244 | if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64) |
| 7245 | return 8; |
| 7246 | if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI64) |
| 7247 | { |
| 7248 | bfd_boolean long32_p, long64_p; |
| 7249 | |
| 7250 | long32_p = bfd_get_section_by_name (abfd, ".gcc_compiled_long32") != 0; |
| 7251 | long64_p = bfd_get_section_by_name (abfd, ".gcc_compiled_long64") != 0; |
| 7252 | if (long32_p && long64_p) |
| 7253 | return 0; |
| 7254 | if (long32_p) |
| 7255 | return 4; |
| 7256 | if (long64_p) |
| 7257 | return 8; |
| 7258 | |
| 7259 | if (sec->reloc_count > 0 |
| 7260 | && elf_section_data (sec)->relocs != NULL |
| 7261 | && (ELF32_R_TYPE (elf_section_data (sec)->relocs[0].r_info) |
| 7262 | == R_MIPS_64)) |
| 7263 | return 8; |
| 7264 | |
| 7265 | return 0; |
| 7266 | } |
| 7267 | return 4; |
| 7268 | } |
| 7269 | \f |
| 7270 | /* There appears to be a bug in the MIPSpro linker that causes GOT_DISP |
| 7271 | relocations against two unnamed section symbols to resolve to the |
| 7272 | same address. For example, if we have code like: |
| 7273 | |
| 7274 | lw $4,%got_disp(.data)($gp) |
| 7275 | lw $25,%got_disp(.text)($gp) |
| 7276 | jalr $25 |
| 7277 | |
| 7278 | then the linker will resolve both relocations to .data and the program |
| 7279 | will jump there rather than to .text. |
| 7280 | |
| 7281 | We can work around this problem by giving names to local section symbols. |
| 7282 | This is also what the MIPSpro tools do. */ |
| 7283 | |
| 7284 | bfd_boolean |
| 7285 | _bfd_mips_elf_name_local_section_symbols (bfd *abfd) |
| 7286 | { |
| 7287 | return SGI_COMPAT (abfd); |
| 7288 | } |
| 7289 | \f |
| 7290 | /* Work over a section just before writing it out. This routine is |
| 7291 | used by both the 32-bit and the 64-bit ABI. FIXME: We recognize |
| 7292 | sections that need the SHF_MIPS_GPREL flag by name; there has to be |
| 7293 | a better way. */ |
| 7294 | |
| 7295 | bfd_boolean |
| 7296 | _bfd_mips_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *hdr) |
| 7297 | { |
| 7298 | if (hdr->sh_type == SHT_MIPS_REGINFO |
| 7299 | && hdr->sh_size > 0) |
| 7300 | { |
| 7301 | bfd_byte buf[4]; |
| 7302 | |
| 7303 | BFD_ASSERT (hdr->contents == NULL); |
| 7304 | |
| 7305 | if (hdr->sh_size != sizeof (Elf32_External_RegInfo)) |
| 7306 | { |
| 7307 | _bfd_error_handler |
| 7308 | (_("%pB: incorrect `.reginfo' section size; " |
| 7309 | "expected %" PRIu64 ", got %" PRIu64), |
| 7310 | abfd, (uint64_t) sizeof (Elf32_External_RegInfo), |
| 7311 | (uint64_t) hdr->sh_size); |
| 7312 | bfd_set_error (bfd_error_bad_value); |
| 7313 | return FALSE; |
| 7314 | } |
| 7315 | |
| 7316 | if (bfd_seek (abfd, |
| 7317 | hdr->sh_offset + sizeof (Elf32_External_RegInfo) - 4, |
| 7318 | SEEK_SET) != 0) |
| 7319 | return FALSE; |
| 7320 | H_PUT_32 (abfd, elf_gp (abfd), buf); |
| 7321 | if (bfd_bwrite (buf, 4, abfd) != 4) |
| 7322 | return FALSE; |
| 7323 | } |
| 7324 | |
| 7325 | if (hdr->sh_type == SHT_MIPS_OPTIONS |
| 7326 | && hdr->bfd_section != NULL |
| 7327 | && mips_elf_section_data (hdr->bfd_section) != NULL |
| 7328 | && mips_elf_section_data (hdr->bfd_section)->u.tdata != NULL) |
| 7329 | { |
| 7330 | bfd_byte *contents, *l, *lend; |
| 7331 | |
| 7332 | /* We stored the section contents in the tdata field in the |
| 7333 | set_section_contents routine. We save the section contents |
| 7334 | so that we don't have to read them again. |
| 7335 | At this point we know that elf_gp is set, so we can look |
| 7336 | through the section contents to see if there is an |
| 7337 | ODK_REGINFO structure. */ |
| 7338 | |
| 7339 | contents = mips_elf_section_data (hdr->bfd_section)->u.tdata; |
| 7340 | l = contents; |
| 7341 | lend = contents + hdr->sh_size; |
| 7342 | while (l + sizeof (Elf_External_Options) <= lend) |
| 7343 | { |
| 7344 | Elf_Internal_Options intopt; |
| 7345 | |
| 7346 | bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l, |
| 7347 | &intopt); |
| 7348 | if (intopt.size < sizeof (Elf_External_Options)) |
| 7349 | { |
| 7350 | _bfd_error_handler |
| 7351 | /* xgettext:c-format */ |
| 7352 | (_("%pB: warning: bad `%s' option size %u smaller than" |
| 7353 | " its header"), |
| 7354 | abfd, MIPS_ELF_OPTIONS_SECTION_NAME (abfd), intopt.size); |
| 7355 | break; |
| 7356 | } |
| 7357 | if (ABI_64_P (abfd) && intopt.kind == ODK_REGINFO) |
| 7358 | { |
| 7359 | bfd_byte buf[8]; |
| 7360 | |
| 7361 | if (bfd_seek (abfd, |
| 7362 | (hdr->sh_offset |
| 7363 | + (l - contents) |
| 7364 | + sizeof (Elf_External_Options) |
| 7365 | + (sizeof (Elf64_External_RegInfo) - 8)), |
| 7366 | SEEK_SET) != 0) |
| 7367 | return FALSE; |
| 7368 | H_PUT_64 (abfd, elf_gp (abfd), buf); |
| 7369 | if (bfd_bwrite (buf, 8, abfd) != 8) |
| 7370 | return FALSE; |
| 7371 | } |
| 7372 | else if (intopt.kind == ODK_REGINFO) |
| 7373 | { |
| 7374 | bfd_byte buf[4]; |
| 7375 | |
| 7376 | if (bfd_seek (abfd, |
| 7377 | (hdr->sh_offset |
| 7378 | + (l - contents) |
| 7379 | + sizeof (Elf_External_Options) |
| 7380 | + (sizeof (Elf32_External_RegInfo) - 4)), |
| 7381 | SEEK_SET) != 0) |
| 7382 | return FALSE; |
| 7383 | H_PUT_32 (abfd, elf_gp (abfd), buf); |
| 7384 | if (bfd_bwrite (buf, 4, abfd) != 4) |
| 7385 | return FALSE; |
| 7386 | } |
| 7387 | l += intopt.size; |
| 7388 | } |
| 7389 | } |
| 7390 | |
| 7391 | if (hdr->bfd_section != NULL) |
| 7392 | { |
| 7393 | const char *name = bfd_section_name (hdr->bfd_section); |
| 7394 | |
| 7395 | /* .sbss is not handled specially here because the GNU/Linux |
| 7396 | prelinker can convert .sbss from NOBITS to PROGBITS and |
| 7397 | changing it back to NOBITS breaks the binary. The entry in |
| 7398 | _bfd_mips_elf_special_sections will ensure the correct flags |
| 7399 | are set on .sbss if BFD creates it without reading it from an |
| 7400 | input file, and without special handling here the flags set |
| 7401 | on it in an input file will be followed. */ |
| 7402 | if (strcmp (name, ".sdata") == 0 |
| 7403 | || strcmp (name, ".lit8") == 0 |
| 7404 | || strcmp (name, ".lit4") == 0) |
| 7405 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; |
| 7406 | else if (strcmp (name, ".srdata") == 0) |
| 7407 | hdr->sh_flags |= SHF_ALLOC | SHF_MIPS_GPREL; |
| 7408 | else if (strcmp (name, ".compact_rel") == 0) |
| 7409 | hdr->sh_flags = 0; |
| 7410 | else if (strcmp (name, ".rtproc") == 0) |
| 7411 | { |
| 7412 | if (hdr->sh_addralign != 0 && hdr->sh_entsize == 0) |
| 7413 | { |
| 7414 | unsigned int adjust; |
| 7415 | |
| 7416 | adjust = hdr->sh_size % hdr->sh_addralign; |
| 7417 | if (adjust != 0) |
| 7418 | hdr->sh_size += hdr->sh_addralign - adjust; |
| 7419 | } |
| 7420 | } |
| 7421 | } |
| 7422 | |
| 7423 | return TRUE; |
| 7424 | } |
| 7425 | |
| 7426 | /* Handle a MIPS specific section when reading an object file. This |
| 7427 | is called when elfcode.h finds a section with an unknown type. |
| 7428 | This routine supports both the 32-bit and 64-bit ELF ABI. */ |
| 7429 | |
| 7430 | bfd_boolean |
| 7431 | _bfd_mips_elf_section_from_shdr (bfd *abfd, |
| 7432 | Elf_Internal_Shdr *hdr, |
| 7433 | const char *name, |
| 7434 | int shindex) |
| 7435 | { |
| 7436 | flagword flags = 0; |
| 7437 | |
| 7438 | /* There ought to be a place to keep ELF backend specific flags, but |
| 7439 | at the moment there isn't one. We just keep track of the |
| 7440 | sections by their name, instead. Fortunately, the ABI gives |
| 7441 | suggested names for all the MIPS specific sections, so we will |
| 7442 | probably get away with this. */ |
| 7443 | switch (hdr->sh_type) |
| 7444 | { |
| 7445 | case SHT_MIPS_LIBLIST: |
| 7446 | if (strcmp (name, ".liblist") != 0) |
| 7447 | return FALSE; |
| 7448 | break; |
| 7449 | case SHT_MIPS_MSYM: |
| 7450 | if (strcmp (name, ".msym") != 0) |
| 7451 | return FALSE; |
| 7452 | break; |
| 7453 | case SHT_MIPS_CONFLICT: |
| 7454 | if (strcmp (name, ".conflict") != 0) |
| 7455 | return FALSE; |
| 7456 | break; |
| 7457 | case SHT_MIPS_GPTAB: |
| 7458 | if (! CONST_STRNEQ (name, ".gptab.")) |
| 7459 | return FALSE; |
| 7460 | break; |
| 7461 | case SHT_MIPS_UCODE: |
| 7462 | if (strcmp (name, ".ucode") != 0) |
| 7463 | return FALSE; |
| 7464 | break; |
| 7465 | case SHT_MIPS_DEBUG: |
| 7466 | if (strcmp (name, ".mdebug") != 0) |
| 7467 | return FALSE; |
| 7468 | flags = SEC_DEBUGGING; |
| 7469 | break; |
| 7470 | case SHT_MIPS_REGINFO: |
| 7471 | if (strcmp (name, ".reginfo") != 0 |
| 7472 | || hdr->sh_size != sizeof (Elf32_External_RegInfo)) |
| 7473 | return FALSE; |
| 7474 | flags = (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_SIZE); |
| 7475 | break; |
| 7476 | case SHT_MIPS_IFACE: |
| 7477 | if (strcmp (name, ".MIPS.interfaces") != 0) |
| 7478 | return FALSE; |
| 7479 | break; |
| 7480 | case SHT_MIPS_CONTENT: |
| 7481 | if (! CONST_STRNEQ (name, ".MIPS.content")) |
| 7482 | return FALSE; |
| 7483 | break; |
| 7484 | case SHT_MIPS_OPTIONS: |
| 7485 | if (!MIPS_ELF_OPTIONS_SECTION_NAME_P (name)) |
| 7486 | return FALSE; |
| 7487 | break; |
| 7488 | case SHT_MIPS_ABIFLAGS: |
| 7489 | if (!MIPS_ELF_ABIFLAGS_SECTION_NAME_P (name)) |
| 7490 | return FALSE; |
| 7491 | flags = (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_SIZE); |
| 7492 | break; |
| 7493 | case SHT_MIPS_DWARF: |
| 7494 | if (! CONST_STRNEQ (name, ".debug_") |
| 7495 | && ! CONST_STRNEQ (name, ".zdebug_")) |
| 7496 | return FALSE; |
| 7497 | break; |
| 7498 | case SHT_MIPS_SYMBOL_LIB: |
| 7499 | if (strcmp (name, ".MIPS.symlib") != 0) |
| 7500 | return FALSE; |
| 7501 | break; |
| 7502 | case SHT_MIPS_EVENTS: |
| 7503 | if (! CONST_STRNEQ (name, ".MIPS.events") |
| 7504 | && ! CONST_STRNEQ (name, ".MIPS.post_rel")) |
| 7505 | return FALSE; |
| 7506 | break; |
| 7507 | case SHT_MIPS_XHASH: |
| 7508 | if (strcmp (name, ".MIPS.xhash") != 0) |
| 7509 | return FALSE; |
| 7510 | default: |
| 7511 | break; |
| 7512 | } |
| 7513 | |
| 7514 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 7515 | return FALSE; |
| 7516 | |
| 7517 | if (hdr->sh_flags & SHF_MIPS_GPREL) |
| 7518 | flags |= SEC_SMALL_DATA; |
| 7519 | |
| 7520 | if (flags) |
| 7521 | { |
| 7522 | if (!bfd_set_section_flags (hdr->bfd_section, |
| 7523 | (bfd_section_flags (hdr->bfd_section) |
| 7524 | | flags))) |
| 7525 | return FALSE; |
| 7526 | } |
| 7527 | |
| 7528 | if (hdr->sh_type == SHT_MIPS_ABIFLAGS) |
| 7529 | { |
| 7530 | Elf_External_ABIFlags_v0 ext; |
| 7531 | |
| 7532 | if (! bfd_get_section_contents (abfd, hdr->bfd_section, |
| 7533 | &ext, 0, sizeof ext)) |
| 7534 | return FALSE; |
| 7535 | bfd_mips_elf_swap_abiflags_v0_in (abfd, &ext, |
| 7536 | &mips_elf_tdata (abfd)->abiflags); |
| 7537 | if (mips_elf_tdata (abfd)->abiflags.version != 0) |
| 7538 | return FALSE; |
| 7539 | mips_elf_tdata (abfd)->abiflags_valid = TRUE; |
| 7540 | } |
| 7541 | |
| 7542 | /* FIXME: We should record sh_info for a .gptab section. */ |
| 7543 | |
| 7544 | /* For a .reginfo section, set the gp value in the tdata information |
| 7545 | from the contents of this section. We need the gp value while |
| 7546 | processing relocs, so we just get it now. The .reginfo section |
| 7547 | is not used in the 64-bit MIPS ELF ABI. */ |
| 7548 | if (hdr->sh_type == SHT_MIPS_REGINFO) |
| 7549 | { |
| 7550 | Elf32_External_RegInfo ext; |
| 7551 | Elf32_RegInfo s; |
| 7552 | |
| 7553 | if (! bfd_get_section_contents (abfd, hdr->bfd_section, |
| 7554 | &ext, 0, sizeof ext)) |
| 7555 | return FALSE; |
| 7556 | bfd_mips_elf32_swap_reginfo_in (abfd, &ext, &s); |
| 7557 | elf_gp (abfd) = s.ri_gp_value; |
| 7558 | } |
| 7559 | |
| 7560 | /* For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and |
| 7561 | set the gp value based on what we find. We may see both |
| 7562 | SHT_MIPS_REGINFO and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case, |
| 7563 | they should agree. */ |
| 7564 | if (hdr->sh_type == SHT_MIPS_OPTIONS) |
| 7565 | { |
| 7566 | bfd_byte *contents, *l, *lend; |
| 7567 | |
| 7568 | contents = bfd_malloc (hdr->sh_size); |
| 7569 | if (contents == NULL) |
| 7570 | return FALSE; |
| 7571 | if (! bfd_get_section_contents (abfd, hdr->bfd_section, contents, |
| 7572 | 0, hdr->sh_size)) |
| 7573 | { |
| 7574 | free (contents); |
| 7575 | return FALSE; |
| 7576 | } |
| 7577 | l = contents; |
| 7578 | lend = contents + hdr->sh_size; |
| 7579 | while (l + sizeof (Elf_External_Options) <= lend) |
| 7580 | { |
| 7581 | Elf_Internal_Options intopt; |
| 7582 | |
| 7583 | bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l, |
| 7584 | &intopt); |
| 7585 | if (intopt.size < sizeof (Elf_External_Options)) |
| 7586 | { |
| 7587 | _bfd_error_handler |
| 7588 | /* xgettext:c-format */ |
| 7589 | (_("%pB: warning: bad `%s' option size %u smaller than" |
| 7590 | " its header"), |
| 7591 | abfd, MIPS_ELF_OPTIONS_SECTION_NAME (abfd), intopt.size); |
| 7592 | break; |
| 7593 | } |
| 7594 | if (ABI_64_P (abfd) && intopt.kind == ODK_REGINFO) |
| 7595 | { |
| 7596 | Elf64_Internal_RegInfo intreg; |
| 7597 | |
| 7598 | bfd_mips_elf64_swap_reginfo_in |
| 7599 | (abfd, |
| 7600 | ((Elf64_External_RegInfo *) |
| 7601 | (l + sizeof (Elf_External_Options))), |
| 7602 | &intreg); |
| 7603 | elf_gp (abfd) = intreg.ri_gp_value; |
| 7604 | } |
| 7605 | else if (intopt.kind == ODK_REGINFO) |
| 7606 | { |
| 7607 | Elf32_RegInfo intreg; |
| 7608 | |
| 7609 | bfd_mips_elf32_swap_reginfo_in |
| 7610 | (abfd, |
| 7611 | ((Elf32_External_RegInfo *) |
| 7612 | (l + sizeof (Elf_External_Options))), |
| 7613 | &intreg); |
| 7614 | elf_gp (abfd) = intreg.ri_gp_value; |
| 7615 | } |
| 7616 | l += intopt.size; |
| 7617 | } |
| 7618 | free (contents); |
| 7619 | } |
| 7620 | |
| 7621 | return TRUE; |
| 7622 | } |
| 7623 | |
| 7624 | /* Set the correct type for a MIPS ELF section. We do this by the |
| 7625 | section name, which is a hack, but ought to work. This routine is |
| 7626 | used by both the 32-bit and the 64-bit ABI. */ |
| 7627 | |
| 7628 | bfd_boolean |
| 7629 | _bfd_mips_elf_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec) |
| 7630 | { |
| 7631 | const char *name = bfd_section_name (sec); |
| 7632 | |
| 7633 | if (strcmp (name, ".liblist") == 0) |
| 7634 | { |
| 7635 | hdr->sh_type = SHT_MIPS_LIBLIST; |
| 7636 | hdr->sh_info = sec->size / sizeof (Elf32_Lib); |
| 7637 | /* The sh_link field is set in final_write_processing. */ |
| 7638 | } |
| 7639 | else if (strcmp (name, ".conflict") == 0) |
| 7640 | hdr->sh_type = SHT_MIPS_CONFLICT; |
| 7641 | else if (CONST_STRNEQ (name, ".gptab.")) |
| 7642 | { |
| 7643 | hdr->sh_type = SHT_MIPS_GPTAB; |
| 7644 | hdr->sh_entsize = sizeof (Elf32_External_gptab); |
| 7645 | /* The sh_info field is set in final_write_processing. */ |
| 7646 | } |
| 7647 | else if (strcmp (name, ".ucode") == 0) |
| 7648 | hdr->sh_type = SHT_MIPS_UCODE; |
| 7649 | else if (strcmp (name, ".mdebug") == 0) |
| 7650 | { |
| 7651 | hdr->sh_type = SHT_MIPS_DEBUG; |
| 7652 | /* In a shared object on IRIX 5.3, the .mdebug section has an |
| 7653 | entsize of 0. FIXME: Does this matter? */ |
| 7654 | if (SGI_COMPAT (abfd) && (abfd->flags & DYNAMIC) != 0) |
| 7655 | hdr->sh_entsize = 0; |
| 7656 | else |
| 7657 | hdr->sh_entsize = 1; |
| 7658 | } |
| 7659 | else if (strcmp (name, ".reginfo") == 0) |
| 7660 | { |
| 7661 | hdr->sh_type = SHT_MIPS_REGINFO; |
| 7662 | /* In a shared object on IRIX 5.3, the .reginfo section has an |
| 7663 | entsize of 0x18. FIXME: Does this matter? */ |
| 7664 | if (SGI_COMPAT (abfd)) |
| 7665 | { |
| 7666 | if ((abfd->flags & DYNAMIC) != 0) |
| 7667 | hdr->sh_entsize = sizeof (Elf32_External_RegInfo); |
| 7668 | else |
| 7669 | hdr->sh_entsize = 1; |
| 7670 | } |
| 7671 | else |
| 7672 | hdr->sh_entsize = sizeof (Elf32_External_RegInfo); |
| 7673 | } |
| 7674 | else if (SGI_COMPAT (abfd) |
| 7675 | && (strcmp (name, ".hash") == 0 |
| 7676 | || strcmp (name, ".dynamic") == 0 |
| 7677 | || strcmp (name, ".dynstr") == 0)) |
| 7678 | { |
| 7679 | if (SGI_COMPAT (abfd)) |
| 7680 | hdr->sh_entsize = 0; |
| 7681 | #if 0 |
| 7682 | /* This isn't how the IRIX6 linker behaves. */ |
| 7683 | hdr->sh_info = SIZEOF_MIPS_DYNSYM_SECNAMES; |
| 7684 | #endif |
| 7685 | } |
| 7686 | else if (strcmp (name, ".got") == 0 |
| 7687 | || strcmp (name, ".srdata") == 0 |
| 7688 | || strcmp (name, ".sdata") == 0 |
| 7689 | || strcmp (name, ".sbss") == 0 |
| 7690 | || strcmp (name, ".lit4") == 0 |
| 7691 | || strcmp (name, ".lit8") == 0) |
| 7692 | hdr->sh_flags |= SHF_MIPS_GPREL; |
| 7693 | else if (strcmp (name, ".MIPS.interfaces") == 0) |
| 7694 | { |
| 7695 | hdr->sh_type = SHT_MIPS_IFACE; |
| 7696 | hdr->sh_flags |= SHF_MIPS_NOSTRIP; |
| 7697 | } |
| 7698 | else if (CONST_STRNEQ (name, ".MIPS.content")) |
| 7699 | { |
| 7700 | hdr->sh_type = SHT_MIPS_CONTENT; |
| 7701 | hdr->sh_flags |= SHF_MIPS_NOSTRIP; |
| 7702 | /* The sh_info field is set in final_write_processing. */ |
| 7703 | } |
| 7704 | else if (MIPS_ELF_OPTIONS_SECTION_NAME_P (name)) |
| 7705 | { |
| 7706 | hdr->sh_type = SHT_MIPS_OPTIONS; |
| 7707 | hdr->sh_entsize = 1; |
| 7708 | hdr->sh_flags |= SHF_MIPS_NOSTRIP; |
| 7709 | } |
| 7710 | else if (CONST_STRNEQ (name, ".MIPS.abiflags")) |
| 7711 | { |
| 7712 | hdr->sh_type = SHT_MIPS_ABIFLAGS; |
| 7713 | hdr->sh_entsize = sizeof (Elf_External_ABIFlags_v0); |
| 7714 | } |
| 7715 | else if (CONST_STRNEQ (name, ".debug_") |
| 7716 | || CONST_STRNEQ (name, ".zdebug_")) |
| 7717 | { |
| 7718 | hdr->sh_type = SHT_MIPS_DWARF; |
| 7719 | |
| 7720 | /* Irix facilities such as libexc expect a single .debug_frame |
| 7721 | per executable, the system ones have NOSTRIP set and the linker |
| 7722 | doesn't merge sections with different flags so ... */ |
| 7723 | if (SGI_COMPAT (abfd) && CONST_STRNEQ (name, ".debug_frame")) |
| 7724 | hdr->sh_flags |= SHF_MIPS_NOSTRIP; |
| 7725 | } |
| 7726 | else if (strcmp (name, ".MIPS.symlib") == 0) |
| 7727 | { |
| 7728 | hdr->sh_type = SHT_MIPS_SYMBOL_LIB; |
| 7729 | /* The sh_link and sh_info fields are set in |
| 7730 | final_write_processing. */ |
| 7731 | } |
| 7732 | else if (CONST_STRNEQ (name, ".MIPS.events") |
| 7733 | || CONST_STRNEQ (name, ".MIPS.post_rel")) |
| 7734 | { |
| 7735 | hdr->sh_type = SHT_MIPS_EVENTS; |
| 7736 | hdr->sh_flags |= SHF_MIPS_NOSTRIP; |
| 7737 | /* The sh_link field is set in final_write_processing. */ |
| 7738 | } |
| 7739 | else if (strcmp (name, ".msym") == 0) |
| 7740 | { |
| 7741 | hdr->sh_type = SHT_MIPS_MSYM; |
| 7742 | hdr->sh_flags |= SHF_ALLOC; |
| 7743 | hdr->sh_entsize = 8; |
| 7744 | } |
| 7745 | else if (strcmp (name, ".MIPS.xhash") == 0) |
| 7746 | { |
| 7747 | hdr->sh_type = SHT_MIPS_XHASH; |
| 7748 | hdr->sh_flags |= SHF_ALLOC; |
| 7749 | hdr->sh_entsize = get_elf_backend_data(abfd)->s->arch_size == 64 ? 0 : 4; |
| 7750 | } |
| 7751 | |
| 7752 | /* The generic elf_fake_sections will set up REL_HDR using the default |
| 7753 | kind of relocations. We used to set up a second header for the |
| 7754 | non-default kind of relocations here, but only NewABI would use |
| 7755 | these, and the IRIX ld doesn't like resulting empty RELA sections. |
| 7756 | Thus we create those header only on demand now. */ |
| 7757 | |
| 7758 | return TRUE; |
| 7759 | } |
| 7760 | |
| 7761 | /* Given a BFD section, try to locate the corresponding ELF section |
| 7762 | index. This is used by both the 32-bit and the 64-bit ABI. |
| 7763 | Actually, it's not clear to me that the 64-bit ABI supports these, |
| 7764 | but for non-PIC objects we will certainly want support for at least |
| 7765 | the .scommon section. */ |
| 7766 | |
| 7767 | bfd_boolean |
| 7768 | _bfd_mips_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
| 7769 | asection *sec, int *retval) |
| 7770 | { |
| 7771 | if (strcmp (bfd_section_name (sec), ".scommon") == 0) |
| 7772 | { |
| 7773 | *retval = SHN_MIPS_SCOMMON; |
| 7774 | return TRUE; |
| 7775 | } |
| 7776 | if (strcmp (bfd_section_name (sec), ".acommon") == 0) |
| 7777 | { |
| 7778 | *retval = SHN_MIPS_ACOMMON; |
| 7779 | return TRUE; |
| 7780 | } |
| 7781 | return FALSE; |
| 7782 | } |
| 7783 | \f |
| 7784 | /* Hook called by the linker routine which adds symbols from an object |
| 7785 | file. We must handle the special MIPS section numbers here. */ |
| 7786 | |
| 7787 | bfd_boolean |
| 7788 | _bfd_mips_elf_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, |
| 7789 | Elf_Internal_Sym *sym, const char **namep, |
| 7790 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 7791 | asection **secp, bfd_vma *valp) |
| 7792 | { |
| 7793 | if (SGI_COMPAT (abfd) |
| 7794 | && (abfd->flags & DYNAMIC) != 0 |
| 7795 | && strcmp (*namep, "_rld_new_interface") == 0) |
| 7796 | { |
| 7797 | /* Skip IRIX5 rld entry name. */ |
| 7798 | *namep = NULL; |
| 7799 | return TRUE; |
| 7800 | } |
| 7801 | |
| 7802 | /* Shared objects may have a dynamic symbol '_gp_disp' defined as |
| 7803 | a SECTION *ABS*. This causes ld to think it can resolve _gp_disp |
| 7804 | by setting a DT_NEEDED for the shared object. Since _gp_disp is |
| 7805 | a magic symbol resolved by the linker, we ignore this bogus definition |
| 7806 | of _gp_disp. New ABI objects do not suffer from this problem so this |
| 7807 | is not done for them. */ |
| 7808 | if (!NEWABI_P(abfd) |
| 7809 | && (sym->st_shndx == SHN_ABS) |
| 7810 | && (strcmp (*namep, "_gp_disp") == 0)) |
| 7811 | { |
| 7812 | *namep = NULL; |
| 7813 | return TRUE; |
| 7814 | } |
| 7815 | |
| 7816 | switch (sym->st_shndx) |
| 7817 | { |
| 7818 | case SHN_COMMON: |
| 7819 | /* Common symbols less than the GP size are automatically |
| 7820 | treated as SHN_MIPS_SCOMMON symbols. */ |
| 7821 | if (sym->st_size > elf_gp_size (abfd) |
| 7822 | || ELF_ST_TYPE (sym->st_info) == STT_TLS |
| 7823 | || IRIX_COMPAT (abfd) == ict_irix6) |
| 7824 | break; |
| 7825 | /* Fall through. */ |
| 7826 | case SHN_MIPS_SCOMMON: |
| 7827 | *secp = bfd_make_section_old_way (abfd, ".scommon"); |
| 7828 | (*secp)->flags |= SEC_IS_COMMON; |
| 7829 | *valp = sym->st_size; |
| 7830 | break; |
| 7831 | |
| 7832 | case SHN_MIPS_TEXT: |
| 7833 | /* This section is used in a shared object. */ |
| 7834 | if (mips_elf_tdata (abfd)->elf_text_section == NULL) |
| 7835 | { |
| 7836 | asymbol *elf_text_symbol; |
| 7837 | asection *elf_text_section; |
| 7838 | size_t amt = sizeof (asection); |
| 7839 | |
| 7840 | elf_text_section = bfd_zalloc (abfd, amt); |
| 7841 | if (elf_text_section == NULL) |
| 7842 | return FALSE; |
| 7843 | |
| 7844 | amt = sizeof (asymbol); |
| 7845 | elf_text_symbol = bfd_zalloc (abfd, amt); |
| 7846 | if (elf_text_symbol == NULL) |
| 7847 | return FALSE; |
| 7848 | |
| 7849 | /* Initialize the section. */ |
| 7850 | |
| 7851 | mips_elf_tdata (abfd)->elf_text_section = elf_text_section; |
| 7852 | mips_elf_tdata (abfd)->elf_text_symbol = elf_text_symbol; |
| 7853 | |
| 7854 | elf_text_section->symbol = elf_text_symbol; |
| 7855 | elf_text_section->symbol_ptr_ptr = &mips_elf_tdata (abfd)->elf_text_symbol; |
| 7856 | |
| 7857 | elf_text_section->name = ".text"; |
| 7858 | elf_text_section->flags = SEC_NO_FLAGS; |
| 7859 | elf_text_section->output_section = NULL; |
| 7860 | elf_text_section->owner = abfd; |
| 7861 | elf_text_symbol->name = ".text"; |
| 7862 | elf_text_symbol->flags = BSF_SECTION_SYM | BSF_DYNAMIC; |
| 7863 | elf_text_symbol->section = elf_text_section; |
| 7864 | } |
| 7865 | /* This code used to do *secp = bfd_und_section_ptr if |
| 7866 | bfd_link_pic (info). I don't know why, and that doesn't make sense, |
| 7867 | so I took it out. */ |
| 7868 | *secp = mips_elf_tdata (abfd)->elf_text_section; |
| 7869 | break; |
| 7870 | |
| 7871 | case SHN_MIPS_ACOMMON: |
| 7872 | /* Fall through. XXX Can we treat this as allocated data? */ |
| 7873 | case SHN_MIPS_DATA: |
| 7874 | /* This section is used in a shared object. */ |
| 7875 | if (mips_elf_tdata (abfd)->elf_data_section == NULL) |
| 7876 | { |
| 7877 | asymbol *elf_data_symbol; |
| 7878 | asection *elf_data_section; |
| 7879 | size_t amt = sizeof (asection); |
| 7880 | |
| 7881 | elf_data_section = bfd_zalloc (abfd, amt); |
| 7882 | if (elf_data_section == NULL) |
| 7883 | return FALSE; |
| 7884 | |
| 7885 | amt = sizeof (asymbol); |
| 7886 | elf_data_symbol = bfd_zalloc (abfd, amt); |
| 7887 | if (elf_data_symbol == NULL) |
| 7888 | return FALSE; |
| 7889 | |
| 7890 | /* Initialize the section. */ |
| 7891 | |
| 7892 | mips_elf_tdata (abfd)->elf_data_section = elf_data_section; |
| 7893 | mips_elf_tdata (abfd)->elf_data_symbol = elf_data_symbol; |
| 7894 | |
| 7895 | elf_data_section->symbol = elf_data_symbol; |
| 7896 | elf_data_section->symbol_ptr_ptr = &mips_elf_tdata (abfd)->elf_data_symbol; |
| 7897 | |
| 7898 | elf_data_section->name = ".data"; |
| 7899 | elf_data_section->flags = SEC_NO_FLAGS; |
| 7900 | elf_data_section->output_section = NULL; |
| 7901 | elf_data_section->owner = abfd; |
| 7902 | elf_data_symbol->name = ".data"; |
| 7903 | elf_data_symbol->flags = BSF_SECTION_SYM | BSF_DYNAMIC; |
| 7904 | elf_data_symbol->section = elf_data_section; |
| 7905 | } |
| 7906 | /* This code used to do *secp = bfd_und_section_ptr if |
| 7907 | bfd_link_pic (info). I don't know why, and that doesn't make sense, |
| 7908 | so I took it out. */ |
| 7909 | *secp = mips_elf_tdata (abfd)->elf_data_section; |
| 7910 | break; |
| 7911 | |
| 7912 | case SHN_MIPS_SUNDEFINED: |
| 7913 | *secp = bfd_und_section_ptr; |
| 7914 | break; |
| 7915 | } |
| 7916 | |
| 7917 | if (SGI_COMPAT (abfd) |
| 7918 | && ! bfd_link_pic (info) |
| 7919 | && info->output_bfd->xvec == abfd->xvec |
| 7920 | && strcmp (*namep, "__rld_obj_head") == 0) |
| 7921 | { |
| 7922 | struct elf_link_hash_entry *h; |
| 7923 | struct bfd_link_hash_entry *bh; |
| 7924 | |
| 7925 | /* Mark __rld_obj_head as dynamic. */ |
| 7926 | bh = NULL; |
| 7927 | if (! (_bfd_generic_link_add_one_symbol |
| 7928 | (info, abfd, *namep, BSF_GLOBAL, *secp, *valp, NULL, FALSE, |
| 7929 | get_elf_backend_data (abfd)->collect, &bh))) |
| 7930 | return FALSE; |
| 7931 | |
| 7932 | h = (struct elf_link_hash_entry *) bh; |
| 7933 | h->non_elf = 0; |
| 7934 | h->def_regular = 1; |
| 7935 | h->type = STT_OBJECT; |
| 7936 | |
| 7937 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 7938 | return FALSE; |
| 7939 | |
| 7940 | mips_elf_hash_table (info)->use_rld_obj_head = TRUE; |
| 7941 | mips_elf_hash_table (info)->rld_symbol = h; |
| 7942 | } |
| 7943 | |
| 7944 | /* If this is a mips16 text symbol, add 1 to the value to make it |
| 7945 | odd. This will cause something like .word SYM to come up with |
| 7946 | the right value when it is loaded into the PC. */ |
| 7947 | if (ELF_ST_IS_COMPRESSED (sym->st_other)) |
| 7948 | ++*valp; |
| 7949 | |
| 7950 | return TRUE; |
| 7951 | } |
| 7952 | |
| 7953 | /* This hook function is called before the linker writes out a global |
| 7954 | symbol. We mark symbols as small common if appropriate. This is |
| 7955 | also where we undo the increment of the value for a mips16 symbol. */ |
| 7956 | |
| 7957 | int |
| 7958 | _bfd_mips_elf_link_output_symbol_hook |
| 7959 | (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 7960 | const char *name ATTRIBUTE_UNUSED, Elf_Internal_Sym *sym, |
| 7961 | asection *input_sec, struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) |
| 7962 | { |
| 7963 | /* If we see a common symbol, which implies a relocatable link, then |
| 7964 | if a symbol was small common in an input file, mark it as small |
| 7965 | common in the output file. */ |
| 7966 | if (sym->st_shndx == SHN_COMMON |
| 7967 | && strcmp (input_sec->name, ".scommon") == 0) |
| 7968 | sym->st_shndx = SHN_MIPS_SCOMMON; |
| 7969 | |
| 7970 | if (ELF_ST_IS_COMPRESSED (sym->st_other)) |
| 7971 | sym->st_value &= ~1; |
| 7972 | |
| 7973 | return 1; |
| 7974 | } |
| 7975 | \f |
| 7976 | /* Functions for the dynamic linker. */ |
| 7977 | |
| 7978 | /* Create dynamic sections when linking against a dynamic object. */ |
| 7979 | |
| 7980 | bfd_boolean |
| 7981 | _bfd_mips_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 7982 | { |
| 7983 | struct elf_link_hash_entry *h; |
| 7984 | struct bfd_link_hash_entry *bh; |
| 7985 | flagword flags; |
| 7986 | register asection *s; |
| 7987 | const char * const *namep; |
| 7988 | struct mips_elf_link_hash_table *htab; |
| 7989 | |
| 7990 | htab = mips_elf_hash_table (info); |
| 7991 | BFD_ASSERT (htab != NULL); |
| 7992 | |
| 7993 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 7994 | | SEC_LINKER_CREATED | SEC_READONLY); |
| 7995 | |
| 7996 | /* The psABI requires a read-only .dynamic section, but the VxWorks |
| 7997 | EABI doesn't. */ |
| 7998 | if (!htab->is_vxworks) |
| 7999 | { |
| 8000 | s = bfd_get_linker_section (abfd, ".dynamic"); |
| 8001 | if (s != NULL) |
| 8002 | { |
| 8003 | if (!bfd_set_section_flags (s, flags)) |
| 8004 | return FALSE; |
| 8005 | } |
| 8006 | } |
| 8007 | |
| 8008 | /* We need to create .got section. */ |
| 8009 | if (!mips_elf_create_got_section (abfd, info)) |
| 8010 | return FALSE; |
| 8011 | |
| 8012 | if (! mips_elf_rel_dyn_section (info, TRUE)) |
| 8013 | return FALSE; |
| 8014 | |
| 8015 | /* Create .stub section. */ |
| 8016 | s = bfd_make_section_anyway_with_flags (abfd, |
| 8017 | MIPS_ELF_STUB_SECTION_NAME (abfd), |
| 8018 | flags | SEC_CODE); |
| 8019 | if (s == NULL |
| 8020 | || !bfd_set_section_alignment (s, MIPS_ELF_LOG_FILE_ALIGN (abfd))) |
| 8021 | return FALSE; |
| 8022 | htab->sstubs = s; |
| 8023 | |
| 8024 | if (!mips_elf_hash_table (info)->use_rld_obj_head |
| 8025 | && bfd_link_executable (info) |
| 8026 | && bfd_get_linker_section (abfd, ".rld_map") == NULL) |
| 8027 | { |
| 8028 | s = bfd_make_section_anyway_with_flags (abfd, ".rld_map", |
| 8029 | flags &~ (flagword) SEC_READONLY); |
| 8030 | if (s == NULL |
| 8031 | || !bfd_set_section_alignment (s, MIPS_ELF_LOG_FILE_ALIGN (abfd))) |
| 8032 | return FALSE; |
| 8033 | } |
| 8034 | |
| 8035 | /* Create .MIPS.xhash section. */ |
| 8036 | if (info->emit_gnu_hash) |
| 8037 | s = bfd_make_section_anyway_with_flags (abfd, ".MIPS.xhash", |
| 8038 | flags | SEC_READONLY); |
| 8039 | |
| 8040 | /* On IRIX5, we adjust add some additional symbols and change the |
| 8041 | alignments of several sections. There is no ABI documentation |
| 8042 | indicating that this is necessary on IRIX6, nor any evidence that |
| 8043 | the linker takes such action. */ |
| 8044 | if (IRIX_COMPAT (abfd) == ict_irix5) |
| 8045 | { |
| 8046 | for (namep = mips_elf_dynsym_rtproc_names; *namep != NULL; namep++) |
| 8047 | { |
| 8048 | bh = NULL; |
| 8049 | if (! (_bfd_generic_link_add_one_symbol |
| 8050 | (info, abfd, *namep, BSF_GLOBAL, bfd_und_section_ptr, 0, |
| 8051 | NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
| 8052 | return FALSE; |
| 8053 | |
| 8054 | h = (struct elf_link_hash_entry *) bh; |
| 8055 | h->mark = 1; |
| 8056 | h->non_elf = 0; |
| 8057 | h->def_regular = 1; |
| 8058 | h->type = STT_SECTION; |
| 8059 | |
| 8060 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 8061 | return FALSE; |
| 8062 | } |
| 8063 | |
| 8064 | /* We need to create a .compact_rel section. */ |
| 8065 | if (SGI_COMPAT (abfd)) |
| 8066 | { |
| 8067 | if (!mips_elf_create_compact_rel_section (abfd, info)) |
| 8068 | return FALSE; |
| 8069 | } |
| 8070 | |
| 8071 | /* Change alignments of some sections. */ |
| 8072 | s = bfd_get_linker_section (abfd, ".hash"); |
| 8073 | if (s != NULL) |
| 8074 | bfd_set_section_alignment (s, MIPS_ELF_LOG_FILE_ALIGN (abfd)); |
| 8075 | |
| 8076 | s = bfd_get_linker_section (abfd, ".dynsym"); |
| 8077 | if (s != NULL) |
| 8078 | bfd_set_section_alignment (s, MIPS_ELF_LOG_FILE_ALIGN (abfd)); |
| 8079 | |
| 8080 | s = bfd_get_linker_section (abfd, ".dynstr"); |
| 8081 | if (s != NULL) |
| 8082 | bfd_set_section_alignment (s, MIPS_ELF_LOG_FILE_ALIGN (abfd)); |
| 8083 | |
| 8084 | /* ??? */ |
| 8085 | s = bfd_get_section_by_name (abfd, ".reginfo"); |
| 8086 | if (s != NULL) |
| 8087 | bfd_set_section_alignment (s, MIPS_ELF_LOG_FILE_ALIGN (abfd)); |
| 8088 | |
| 8089 | s = bfd_get_linker_section (abfd, ".dynamic"); |
| 8090 | if (s != NULL) |
| 8091 | bfd_set_section_alignment (s, MIPS_ELF_LOG_FILE_ALIGN (abfd)); |
| 8092 | } |
| 8093 | |
| 8094 | if (bfd_link_executable (info)) |
| 8095 | { |
| 8096 | const char *name; |
| 8097 | |
| 8098 | name = SGI_COMPAT (abfd) ? "_DYNAMIC_LINK" : "_DYNAMIC_LINKING"; |
| 8099 | bh = NULL; |
| 8100 | if (!(_bfd_generic_link_add_one_symbol |
| 8101 | (info, abfd, name, BSF_GLOBAL, bfd_abs_section_ptr, 0, |
| 8102 | NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
| 8103 | return FALSE; |
| 8104 | |
| 8105 | h = (struct elf_link_hash_entry *) bh; |
| 8106 | h->non_elf = 0; |
| 8107 | h->def_regular = 1; |
| 8108 | h->type = STT_SECTION; |
| 8109 | |
| 8110 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 8111 | return FALSE; |
| 8112 | |
| 8113 | if (! mips_elf_hash_table (info)->use_rld_obj_head) |
| 8114 | { |
| 8115 | /* __rld_map is a four byte word located in the .data section |
| 8116 | and is filled in by the rtld to contain a pointer to |
| 8117 | the _r_debug structure. Its symbol value will be set in |
| 8118 | _bfd_mips_elf_finish_dynamic_symbol. */ |
| 8119 | s = bfd_get_linker_section (abfd, ".rld_map"); |
| 8120 | BFD_ASSERT (s != NULL); |
| 8121 | |
| 8122 | name = SGI_COMPAT (abfd) ? "__rld_map" : "__RLD_MAP"; |
| 8123 | bh = NULL; |
| 8124 | if (!(_bfd_generic_link_add_one_symbol |
| 8125 | (info, abfd, name, BSF_GLOBAL, s, 0, NULL, FALSE, |
| 8126 | get_elf_backend_data (abfd)->collect, &bh))) |
| 8127 | return FALSE; |
| 8128 | |
| 8129 | h = (struct elf_link_hash_entry *) bh; |
| 8130 | h->non_elf = 0; |
| 8131 | h->def_regular = 1; |
| 8132 | h->type = STT_OBJECT; |
| 8133 | |
| 8134 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 8135 | return FALSE; |
| 8136 | mips_elf_hash_table (info)->rld_symbol = h; |
| 8137 | } |
| 8138 | } |
| 8139 | |
| 8140 | /* Create the .plt, .rel(a).plt, .dynbss and .rel(a).bss sections. |
| 8141 | Also, on VxWorks, create the _PROCEDURE_LINKAGE_TABLE_ symbol. */ |
| 8142 | if (!_bfd_elf_create_dynamic_sections (abfd, info)) |
| 8143 | return FALSE; |
| 8144 | |
| 8145 | /* Do the usual VxWorks handling. */ |
| 8146 | if (htab->is_vxworks |
| 8147 | && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) |
| 8148 | return FALSE; |
| 8149 | |
| 8150 | return TRUE; |
| 8151 | } |
| 8152 | \f |
| 8153 | /* Return true if relocation REL against section SEC is a REL rather than |
| 8154 | RELA relocation. RELOCS is the first relocation in the section and |
| 8155 | ABFD is the bfd that contains SEC. */ |
| 8156 | |
| 8157 | static bfd_boolean |
| 8158 | mips_elf_rel_relocation_p (bfd *abfd, asection *sec, |
| 8159 | const Elf_Internal_Rela *relocs, |
| 8160 | const Elf_Internal_Rela *rel) |
| 8161 | { |
| 8162 | Elf_Internal_Shdr *rel_hdr; |
| 8163 | const struct elf_backend_data *bed; |
| 8164 | |
| 8165 | /* To determine which flavor of relocation this is, we depend on the |
| 8166 | fact that the INPUT_SECTION's REL_HDR is read before RELA_HDR. */ |
| 8167 | rel_hdr = elf_section_data (sec)->rel.hdr; |
| 8168 | if (rel_hdr == NULL) |
| 8169 | return FALSE; |
| 8170 | bed = get_elf_backend_data (abfd); |
| 8171 | return ((size_t) (rel - relocs) |
| 8172 | < NUM_SHDR_ENTRIES (rel_hdr) * bed->s->int_rels_per_ext_rel); |
| 8173 | } |
| 8174 | |
| 8175 | /* Read the addend for REL relocation REL, which belongs to bfd ABFD. |
| 8176 | HOWTO is the relocation's howto and CONTENTS points to the contents |
| 8177 | of the section that REL is against. */ |
| 8178 | |
| 8179 | static bfd_vma |
| 8180 | mips_elf_read_rel_addend (bfd *abfd, const Elf_Internal_Rela *rel, |
| 8181 | reloc_howto_type *howto, bfd_byte *contents) |
| 8182 | { |
| 8183 | bfd_byte *location; |
| 8184 | unsigned int r_type; |
| 8185 | bfd_vma addend; |
| 8186 | bfd_vma bytes; |
| 8187 | |
| 8188 | r_type = ELF_R_TYPE (abfd, rel->r_info); |
| 8189 | location = contents + rel->r_offset; |
| 8190 | |
| 8191 | /* Get the addend, which is stored in the input file. */ |
| 8192 | _bfd_mips_elf_reloc_unshuffle (abfd, r_type, FALSE, location); |
| 8193 | bytes = mips_elf_obtain_contents (howto, rel, abfd, contents); |
| 8194 | _bfd_mips_elf_reloc_shuffle (abfd, r_type, FALSE, location); |
| 8195 | |
| 8196 | addend = bytes & howto->src_mask; |
| 8197 | |
| 8198 | /* Shift is 2, unusually, for microMIPS JALX. Adjust the addend |
| 8199 | accordingly. */ |
| 8200 | if (r_type == R_MICROMIPS_26_S1 && (bytes >> 26) == 0x3c) |
| 8201 | addend <<= 1; |
| 8202 | |
| 8203 | return addend; |
| 8204 | } |
| 8205 | |
| 8206 | /* REL is a relocation in ABFD that needs a partnering LO16 relocation |
| 8207 | and *ADDEND is the addend for REL itself. Look for the LO16 relocation |
| 8208 | and update *ADDEND with the final addend. Return true on success |
| 8209 | or false if the LO16 could not be found. RELEND is the exclusive |
| 8210 | upper bound on the relocations for REL's section. */ |
| 8211 | |
| 8212 | static bfd_boolean |
| 8213 | mips_elf_add_lo16_rel_addend (bfd *abfd, |
| 8214 | const Elf_Internal_Rela *rel, |
| 8215 | const Elf_Internal_Rela *relend, |
| 8216 | bfd_byte *contents, bfd_vma *addend) |
| 8217 | { |
| 8218 | unsigned int r_type, lo16_type; |
| 8219 | const Elf_Internal_Rela *lo16_relocation; |
| 8220 | reloc_howto_type *lo16_howto; |
| 8221 | bfd_vma l; |
| 8222 | |
| 8223 | r_type = ELF_R_TYPE (abfd, rel->r_info); |
| 8224 | if (mips16_reloc_p (r_type)) |
| 8225 | lo16_type = R_MIPS16_LO16; |
| 8226 | else if (micromips_reloc_p (r_type)) |
| 8227 | lo16_type = R_MICROMIPS_LO16; |
| 8228 | else if (r_type == R_MIPS_PCHI16) |
| 8229 | lo16_type = R_MIPS_PCLO16; |
| 8230 | else |
| 8231 | lo16_type = R_MIPS_LO16; |
| 8232 | |
| 8233 | /* The combined value is the sum of the HI16 addend, left-shifted by |
| 8234 | sixteen bits, and the LO16 addend, sign extended. (Usually, the |
| 8235 | code does a `lui' of the HI16 value, and then an `addiu' of the |
| 8236 | LO16 value.) |
| 8237 | |
| 8238 | Scan ahead to find a matching LO16 relocation. |
| 8239 | |
| 8240 | According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must |
| 8241 | be immediately following. However, for the IRIX6 ABI, the next |
| 8242 | relocation may be a composed relocation consisting of several |
| 8243 | relocations for the same address. In that case, the R_MIPS_LO16 |
| 8244 | relocation may occur as one of these. We permit a similar |
| 8245 | extension in general, as that is useful for GCC. |
| 8246 | |
| 8247 | In some cases GCC dead code elimination removes the LO16 but keeps |
| 8248 | the corresponding HI16. This is strictly speaking a violation of |
| 8249 | the ABI but not immediately harmful. */ |
| 8250 | lo16_relocation = mips_elf_next_relocation (abfd, lo16_type, rel, relend); |
| 8251 | if (lo16_relocation == NULL) |
| 8252 | return FALSE; |
| 8253 | |
| 8254 | /* Obtain the addend kept there. */ |
| 8255 | lo16_howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, lo16_type, FALSE); |
| 8256 | l = mips_elf_read_rel_addend (abfd, lo16_relocation, lo16_howto, contents); |
| 8257 | |
| 8258 | l <<= lo16_howto->rightshift; |
| 8259 | l = _bfd_mips_elf_sign_extend (l, 16); |
| 8260 | |
| 8261 | *addend <<= 16; |
| 8262 | *addend += l; |
| 8263 | return TRUE; |
| 8264 | } |
| 8265 | |
| 8266 | /* Try to read the contents of section SEC in bfd ABFD. Return true and |
| 8267 | store the contents in *CONTENTS on success. Assume that *CONTENTS |
| 8268 | already holds the contents if it is nonull on entry. */ |
| 8269 | |
| 8270 | static bfd_boolean |
| 8271 | mips_elf_get_section_contents (bfd *abfd, asection *sec, bfd_byte **contents) |
| 8272 | { |
| 8273 | if (*contents) |
| 8274 | return TRUE; |
| 8275 | |
| 8276 | /* Get cached copy if it exists. */ |
| 8277 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 8278 | { |
| 8279 | *contents = elf_section_data (sec)->this_hdr.contents; |
| 8280 | return TRUE; |
| 8281 | } |
| 8282 | |
| 8283 | return bfd_malloc_and_get_section (abfd, sec, contents); |
| 8284 | } |
| 8285 | |
| 8286 | /* Make a new PLT record to keep internal data. */ |
| 8287 | |
| 8288 | static struct plt_entry * |
| 8289 | mips_elf_make_plt_record (bfd *abfd) |
| 8290 | { |
| 8291 | struct plt_entry *entry; |
| 8292 | |
| 8293 | entry = bfd_zalloc (abfd, sizeof (*entry)); |
| 8294 | if (entry == NULL) |
| 8295 | return NULL; |
| 8296 | |
| 8297 | entry->stub_offset = MINUS_ONE; |
| 8298 | entry->mips_offset = MINUS_ONE; |
| 8299 | entry->comp_offset = MINUS_ONE; |
| 8300 | entry->gotplt_index = MINUS_ONE; |
| 8301 | return entry; |
| 8302 | } |
| 8303 | |
| 8304 | /* Define the special `__gnu_absolute_zero' symbol. We only need this |
| 8305 | for PIC code, as otherwise there is no load-time relocation involved |
| 8306 | and local GOT entries whose value is zero at static link time will |
| 8307 | retain their value at load time. */ |
| 8308 | |
| 8309 | static bfd_boolean |
| 8310 | mips_elf_define_absolute_zero (bfd *abfd, struct bfd_link_info *info, |
| 8311 | struct mips_elf_link_hash_table *htab, |
| 8312 | unsigned int r_type) |
| 8313 | { |
| 8314 | union |
| 8315 | { |
| 8316 | struct elf_link_hash_entry *eh; |
| 8317 | struct bfd_link_hash_entry *bh; |
| 8318 | } |
| 8319 | hzero; |
| 8320 | |
| 8321 | BFD_ASSERT (!htab->use_absolute_zero); |
| 8322 | BFD_ASSERT (bfd_link_pic (info)); |
| 8323 | |
| 8324 | hzero.bh = NULL; |
| 8325 | if (!_bfd_generic_link_add_one_symbol (info, abfd, "__gnu_absolute_zero", |
| 8326 | BSF_GLOBAL, bfd_abs_section_ptr, 0, |
| 8327 | NULL, FALSE, FALSE, &hzero.bh)) |
| 8328 | return FALSE; |
| 8329 | |
| 8330 | BFD_ASSERT (hzero.bh != NULL); |
| 8331 | hzero.eh->size = 0; |
| 8332 | hzero.eh->type = STT_NOTYPE; |
| 8333 | hzero.eh->other = STV_PROTECTED; |
| 8334 | hzero.eh->def_regular = 1; |
| 8335 | hzero.eh->non_elf = 0; |
| 8336 | |
| 8337 | if (!mips_elf_record_global_got_symbol (hzero.eh, abfd, info, TRUE, r_type)) |
| 8338 | return FALSE; |
| 8339 | |
| 8340 | htab->use_absolute_zero = TRUE; |
| 8341 | |
| 8342 | return TRUE; |
| 8343 | } |
| 8344 | |
| 8345 | /* Look through the relocs for a section during the first phase, and |
| 8346 | allocate space in the global offset table and record the need for |
| 8347 | standard MIPS and compressed procedure linkage table entries. */ |
| 8348 | |
| 8349 | bfd_boolean |
| 8350 | _bfd_mips_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 8351 | asection *sec, const Elf_Internal_Rela *relocs) |
| 8352 | { |
| 8353 | const char *name; |
| 8354 | bfd *dynobj; |
| 8355 | Elf_Internal_Shdr *symtab_hdr; |
| 8356 | struct elf_link_hash_entry **sym_hashes; |
| 8357 | size_t extsymoff; |
| 8358 | const Elf_Internal_Rela *rel; |
| 8359 | const Elf_Internal_Rela *rel_end; |
| 8360 | asection *sreloc; |
| 8361 | const struct elf_backend_data *bed; |
| 8362 | struct mips_elf_link_hash_table *htab; |
| 8363 | bfd_byte *contents; |
| 8364 | bfd_vma addend; |
| 8365 | reloc_howto_type *howto; |
| 8366 | |
| 8367 | if (bfd_link_relocatable (info)) |
| 8368 | return TRUE; |
| 8369 | |
| 8370 | htab = mips_elf_hash_table (info); |
| 8371 | BFD_ASSERT (htab != NULL); |
| 8372 | |
| 8373 | dynobj = elf_hash_table (info)->dynobj; |
| 8374 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 8375 | sym_hashes = elf_sym_hashes (abfd); |
| 8376 | extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info; |
| 8377 | |
| 8378 | bed = get_elf_backend_data (abfd); |
| 8379 | rel_end = relocs + sec->reloc_count; |
| 8380 | |
| 8381 | /* Check for the mips16 stub sections. */ |
| 8382 | |
| 8383 | name = bfd_section_name (sec); |
| 8384 | if (FN_STUB_P (name)) |
| 8385 | { |
| 8386 | unsigned long r_symndx; |
| 8387 | |
| 8388 | /* Look at the relocation information to figure out which symbol |
| 8389 | this is for. */ |
| 8390 | |
| 8391 | r_symndx = mips16_stub_symndx (bed, sec, relocs, rel_end); |
| 8392 | if (r_symndx == 0) |
| 8393 | { |
| 8394 | _bfd_error_handler |
| 8395 | /* xgettext:c-format */ |
| 8396 | (_("%pB: warning: cannot determine the target function for" |
| 8397 | " stub section `%s'"), |
| 8398 | abfd, name); |
| 8399 | bfd_set_error (bfd_error_bad_value); |
| 8400 | return FALSE; |
| 8401 | } |
| 8402 | |
| 8403 | if (r_symndx < extsymoff |
| 8404 | || sym_hashes[r_symndx - extsymoff] == NULL) |
| 8405 | { |
| 8406 | asection *o; |
| 8407 | |
| 8408 | /* This stub is for a local symbol. This stub will only be |
| 8409 | needed if there is some relocation in this BFD, other |
| 8410 | than a 16 bit function call, which refers to this symbol. */ |
| 8411 | for (o = abfd->sections; o != NULL; o = o->next) |
| 8412 | { |
| 8413 | Elf_Internal_Rela *sec_relocs; |
| 8414 | const Elf_Internal_Rela *r, *rend; |
| 8415 | |
| 8416 | /* We can ignore stub sections when looking for relocs. */ |
| 8417 | if ((o->flags & SEC_RELOC) == 0 |
| 8418 | || o->reloc_count == 0 |
| 8419 | || section_allows_mips16_refs_p (o)) |
| 8420 | continue; |
| 8421 | |
| 8422 | sec_relocs |
| 8423 | = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, |
| 8424 | info->keep_memory); |
| 8425 | if (sec_relocs == NULL) |
| 8426 | return FALSE; |
| 8427 | |
| 8428 | rend = sec_relocs + o->reloc_count; |
| 8429 | for (r = sec_relocs; r < rend; r++) |
| 8430 | if (ELF_R_SYM (abfd, r->r_info) == r_symndx |
| 8431 | && !mips16_call_reloc_p (ELF_R_TYPE (abfd, r->r_info))) |
| 8432 | break; |
| 8433 | |
| 8434 | if (elf_section_data (o)->relocs != sec_relocs) |
| 8435 | free (sec_relocs); |
| 8436 | |
| 8437 | if (r < rend) |
| 8438 | break; |
| 8439 | } |
| 8440 | |
| 8441 | if (o == NULL) |
| 8442 | { |
| 8443 | /* There is no non-call reloc for this stub, so we do |
| 8444 | not need it. Since this function is called before |
| 8445 | the linker maps input sections to output sections, we |
| 8446 | can easily discard it by setting the SEC_EXCLUDE |
| 8447 | flag. */ |
| 8448 | sec->flags |= SEC_EXCLUDE; |
| 8449 | return TRUE; |
| 8450 | } |
| 8451 | |
| 8452 | /* Record this stub in an array of local symbol stubs for |
| 8453 | this BFD. */ |
| 8454 | if (mips_elf_tdata (abfd)->local_stubs == NULL) |
| 8455 | { |
| 8456 | unsigned long symcount; |
| 8457 | asection **n; |
| 8458 | bfd_size_type amt; |
| 8459 | |
| 8460 | if (elf_bad_symtab (abfd)) |
| 8461 | symcount = NUM_SHDR_ENTRIES (symtab_hdr); |
| 8462 | else |
| 8463 | symcount = symtab_hdr->sh_info; |
| 8464 | amt = symcount * sizeof (asection *); |
| 8465 | n = bfd_zalloc (abfd, amt); |
| 8466 | if (n == NULL) |
| 8467 | return FALSE; |
| 8468 | mips_elf_tdata (abfd)->local_stubs = n; |
| 8469 | } |
| 8470 | |
| 8471 | sec->flags |= SEC_KEEP; |
| 8472 | mips_elf_tdata (abfd)->local_stubs[r_symndx] = sec; |
| 8473 | |
| 8474 | /* We don't need to set mips16_stubs_seen in this case. |
| 8475 | That flag is used to see whether we need to look through |
| 8476 | the global symbol table for stubs. We don't need to set |
| 8477 | it here, because we just have a local stub. */ |
| 8478 | } |
| 8479 | else |
| 8480 | { |
| 8481 | struct mips_elf_link_hash_entry *h; |
| 8482 | |
| 8483 | h = ((struct mips_elf_link_hash_entry *) |
| 8484 | sym_hashes[r_symndx - extsymoff]); |
| 8485 | |
| 8486 | while (h->root.root.type == bfd_link_hash_indirect |
| 8487 | || h->root.root.type == bfd_link_hash_warning) |
| 8488 | h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link; |
| 8489 | |
| 8490 | /* H is the symbol this stub is for. */ |
| 8491 | |
| 8492 | /* If we already have an appropriate stub for this function, we |
| 8493 | don't need another one, so we can discard this one. Since |
| 8494 | this function is called before the linker maps input sections |
| 8495 | to output sections, we can easily discard it by setting the |
| 8496 | SEC_EXCLUDE flag. */ |
| 8497 | if (h->fn_stub != NULL) |
| 8498 | { |
| 8499 | sec->flags |= SEC_EXCLUDE; |
| 8500 | return TRUE; |
| 8501 | } |
| 8502 | |
| 8503 | sec->flags |= SEC_KEEP; |
| 8504 | h->fn_stub = sec; |
| 8505 | mips_elf_hash_table (info)->mips16_stubs_seen = TRUE; |
| 8506 | } |
| 8507 | } |
| 8508 | else if (CALL_STUB_P (name) || CALL_FP_STUB_P (name)) |
| 8509 | { |
| 8510 | unsigned long r_symndx; |
| 8511 | struct mips_elf_link_hash_entry *h; |
| 8512 | asection **loc; |
| 8513 | |
| 8514 | /* Look at the relocation information to figure out which symbol |
| 8515 | this is for. */ |
| 8516 | |
| 8517 | r_symndx = mips16_stub_symndx (bed, sec, relocs, rel_end); |
| 8518 | if (r_symndx == 0) |
| 8519 | { |
| 8520 | _bfd_error_handler |
| 8521 | /* xgettext:c-format */ |
| 8522 | (_("%pB: warning: cannot determine the target function for" |
| 8523 | " stub section `%s'"), |
| 8524 | abfd, name); |
| 8525 | bfd_set_error (bfd_error_bad_value); |
| 8526 | return FALSE; |
| 8527 | } |
| 8528 | |
| 8529 | if (r_symndx < extsymoff |
| 8530 | || sym_hashes[r_symndx - extsymoff] == NULL) |
| 8531 | { |
| 8532 | asection *o; |
| 8533 | |
| 8534 | /* This stub is for a local symbol. This stub will only be |
| 8535 | needed if there is some relocation (R_MIPS16_26) in this BFD |
| 8536 | that refers to this symbol. */ |
| 8537 | for (o = abfd->sections; o != NULL; o = o->next) |
| 8538 | { |
| 8539 | Elf_Internal_Rela *sec_relocs; |
| 8540 | const Elf_Internal_Rela *r, *rend; |
| 8541 | |
| 8542 | /* We can ignore stub sections when looking for relocs. */ |
| 8543 | if ((o->flags & SEC_RELOC) == 0 |
| 8544 | || o->reloc_count == 0 |
| 8545 | || section_allows_mips16_refs_p (o)) |
| 8546 | continue; |
| 8547 | |
| 8548 | sec_relocs |
| 8549 | = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, |
| 8550 | info->keep_memory); |
| 8551 | if (sec_relocs == NULL) |
| 8552 | return FALSE; |
| 8553 | |
| 8554 | rend = sec_relocs + o->reloc_count; |
| 8555 | for (r = sec_relocs; r < rend; r++) |
| 8556 | if (ELF_R_SYM (abfd, r->r_info) == r_symndx |
| 8557 | && ELF_R_TYPE (abfd, r->r_info) == R_MIPS16_26) |
| 8558 | break; |
| 8559 | |
| 8560 | if (elf_section_data (o)->relocs != sec_relocs) |
| 8561 | free (sec_relocs); |
| 8562 | |
| 8563 | if (r < rend) |
| 8564 | break; |
| 8565 | } |
| 8566 | |
| 8567 | if (o == NULL) |
| 8568 | { |
| 8569 | /* There is no non-call reloc for this stub, so we do |
| 8570 | not need it. Since this function is called before |
| 8571 | the linker maps input sections to output sections, we |
| 8572 | can easily discard it by setting the SEC_EXCLUDE |
| 8573 | flag. */ |
| 8574 | sec->flags |= SEC_EXCLUDE; |
| 8575 | return TRUE; |
| 8576 | } |
| 8577 | |
| 8578 | /* Record this stub in an array of local symbol call_stubs for |
| 8579 | this BFD. */ |
| 8580 | if (mips_elf_tdata (abfd)->local_call_stubs == NULL) |
| 8581 | { |
| 8582 | unsigned long symcount; |
| 8583 | asection **n; |
| 8584 | bfd_size_type amt; |
| 8585 | |
| 8586 | if (elf_bad_symtab (abfd)) |
| 8587 | symcount = NUM_SHDR_ENTRIES (symtab_hdr); |
| 8588 | else |
| 8589 | symcount = symtab_hdr->sh_info; |
| 8590 | amt = symcount * sizeof (asection *); |
| 8591 | n = bfd_zalloc (abfd, amt); |
| 8592 | if (n == NULL) |
| 8593 | return FALSE; |
| 8594 | mips_elf_tdata (abfd)->local_call_stubs = n; |
| 8595 | } |
| 8596 | |
| 8597 | sec->flags |= SEC_KEEP; |
| 8598 | mips_elf_tdata (abfd)->local_call_stubs[r_symndx] = sec; |
| 8599 | |
| 8600 | /* We don't need to set mips16_stubs_seen in this case. |
| 8601 | That flag is used to see whether we need to look through |
| 8602 | the global symbol table for stubs. We don't need to set |
| 8603 | it here, because we just have a local stub. */ |
| 8604 | } |
| 8605 | else |
| 8606 | { |
| 8607 | h = ((struct mips_elf_link_hash_entry *) |
| 8608 | sym_hashes[r_symndx - extsymoff]); |
| 8609 | |
| 8610 | /* H is the symbol this stub is for. */ |
| 8611 | |
| 8612 | if (CALL_FP_STUB_P (name)) |
| 8613 | loc = &h->call_fp_stub; |
| 8614 | else |
| 8615 | loc = &h->call_stub; |
| 8616 | |
| 8617 | /* If we already have an appropriate stub for this function, we |
| 8618 | don't need another one, so we can discard this one. Since |
| 8619 | this function is called before the linker maps input sections |
| 8620 | to output sections, we can easily discard it by setting the |
| 8621 | SEC_EXCLUDE flag. */ |
| 8622 | if (*loc != NULL) |
| 8623 | { |
| 8624 | sec->flags |= SEC_EXCLUDE; |
| 8625 | return TRUE; |
| 8626 | } |
| 8627 | |
| 8628 | sec->flags |= SEC_KEEP; |
| 8629 | *loc = sec; |
| 8630 | mips_elf_hash_table (info)->mips16_stubs_seen = TRUE; |
| 8631 | } |
| 8632 | } |
| 8633 | |
| 8634 | sreloc = NULL; |
| 8635 | contents = NULL; |
| 8636 | for (rel = relocs; rel < rel_end; ++rel) |
| 8637 | { |
| 8638 | unsigned long r_symndx; |
| 8639 | unsigned int r_type; |
| 8640 | struct elf_link_hash_entry *h; |
| 8641 | bfd_boolean can_make_dynamic_p; |
| 8642 | bfd_boolean call_reloc_p; |
| 8643 | bfd_boolean constrain_symbol_p; |
| 8644 | |
| 8645 | r_symndx = ELF_R_SYM (abfd, rel->r_info); |
| 8646 | r_type = ELF_R_TYPE (abfd, rel->r_info); |
| 8647 | |
| 8648 | if (r_symndx < extsymoff) |
| 8649 | h = NULL; |
| 8650 | else if (r_symndx >= extsymoff + NUM_SHDR_ENTRIES (symtab_hdr)) |
| 8651 | { |
| 8652 | _bfd_error_handler |
| 8653 | /* xgettext:c-format */ |
| 8654 | (_("%pB: malformed reloc detected for section %s"), |
| 8655 | abfd, name); |
| 8656 | bfd_set_error (bfd_error_bad_value); |
| 8657 | return FALSE; |
| 8658 | } |
| 8659 | else |
| 8660 | { |
| 8661 | h = sym_hashes[r_symndx - extsymoff]; |
| 8662 | if (h != NULL) |
| 8663 | { |
| 8664 | while (h->root.type == bfd_link_hash_indirect |
| 8665 | || h->root.type == bfd_link_hash_warning) |
| 8666 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 8667 | } |
| 8668 | } |
| 8669 | |
| 8670 | /* Set CAN_MAKE_DYNAMIC_P to true if we can convert this |
| 8671 | relocation into a dynamic one. */ |
| 8672 | can_make_dynamic_p = FALSE; |
| 8673 | |
| 8674 | /* Set CALL_RELOC_P to true if the relocation is for a call, |
| 8675 | and if pointer equality therefore doesn't matter. */ |
| 8676 | call_reloc_p = FALSE; |
| 8677 | |
| 8678 | /* Set CONSTRAIN_SYMBOL_P if we need to take the relocation |
| 8679 | into account when deciding how to define the symbol. |
| 8680 | Relocations in nonallocatable sections such as .pdr and |
| 8681 | .debug* should have no effect. */ |
| 8682 | constrain_symbol_p = ((sec->flags & SEC_ALLOC) != 0); |
| 8683 | |
| 8684 | switch (r_type) |
| 8685 | { |
| 8686 | case R_MIPS_CALL16: |
| 8687 | case R_MIPS_CALL_HI16: |
| 8688 | case R_MIPS_CALL_LO16: |
| 8689 | case R_MIPS16_CALL16: |
| 8690 | case R_MICROMIPS_CALL16: |
| 8691 | case R_MICROMIPS_CALL_HI16: |
| 8692 | case R_MICROMIPS_CALL_LO16: |
| 8693 | call_reloc_p = TRUE; |
| 8694 | /* Fall through. */ |
| 8695 | |
| 8696 | case R_MIPS_GOT16: |
| 8697 | case R_MIPS_GOT_LO16: |
| 8698 | case R_MIPS_GOT_PAGE: |
| 8699 | case R_MIPS_GOT_DISP: |
| 8700 | case R_MIPS16_GOT16: |
| 8701 | case R_MICROMIPS_GOT16: |
| 8702 | case R_MICROMIPS_GOT_LO16: |
| 8703 | case R_MICROMIPS_GOT_PAGE: |
| 8704 | case R_MICROMIPS_GOT_DISP: |
| 8705 | /* If we have a symbol that will resolve to zero at static link |
| 8706 | time and it is used by a GOT relocation applied to code we |
| 8707 | cannot relax to an immediate zero load, then we will be using |
| 8708 | the special `__gnu_absolute_zero' symbol whose value is zero |
| 8709 | at dynamic load time. We ignore HI16-type GOT relocations at |
| 8710 | this stage, because their handling will depend entirely on |
| 8711 | the corresponding LO16-type GOT relocation. */ |
| 8712 | if (!call_hi16_reloc_p (r_type) |
| 8713 | && h != NULL |
| 8714 | && bfd_link_pic (info) |
| 8715 | && !htab->use_absolute_zero |
| 8716 | && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 8717 | { |
| 8718 | bfd_boolean rel_reloc; |
| 8719 | |
| 8720 | if (!mips_elf_get_section_contents (abfd, sec, &contents)) |
| 8721 | return FALSE; |
| 8722 | |
| 8723 | rel_reloc = mips_elf_rel_relocation_p (abfd, sec, relocs, rel); |
| 8724 | howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, r_type, !rel_reloc); |
| 8725 | |
| 8726 | if (!mips_elf_nullify_got_load (abfd, contents, rel, howto, |
| 8727 | FALSE)) |
| 8728 | if (!mips_elf_define_absolute_zero (abfd, info, htab, r_type)) |
| 8729 | return FALSE; |
| 8730 | } |
| 8731 | |
| 8732 | /* Fall through. */ |
| 8733 | case R_MIPS_GOT_HI16: |
| 8734 | case R_MIPS_GOT_OFST: |
| 8735 | case R_MIPS_TLS_GOTTPREL: |
| 8736 | case R_MIPS_TLS_GD: |
| 8737 | case R_MIPS_TLS_LDM: |
| 8738 | case R_MIPS16_TLS_GOTTPREL: |
| 8739 | case R_MIPS16_TLS_GD: |
| 8740 | case R_MIPS16_TLS_LDM: |
| 8741 | case R_MICROMIPS_GOT_HI16: |
| 8742 | case R_MICROMIPS_GOT_OFST: |
| 8743 | case R_MICROMIPS_TLS_GOTTPREL: |
| 8744 | case R_MICROMIPS_TLS_GD: |
| 8745 | case R_MICROMIPS_TLS_LDM: |
| 8746 | if (dynobj == NULL) |
| 8747 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 8748 | if (!mips_elf_create_got_section (dynobj, info)) |
| 8749 | return FALSE; |
| 8750 | if (htab->is_vxworks && !bfd_link_pic (info)) |
| 8751 | { |
| 8752 | _bfd_error_handler |
| 8753 | /* xgettext:c-format */ |
| 8754 | (_("%pB: GOT reloc at %#" PRIx64 " not expected in executables"), |
| 8755 | abfd, (uint64_t) rel->r_offset); |
| 8756 | bfd_set_error (bfd_error_bad_value); |
| 8757 | return FALSE; |
| 8758 | } |
| 8759 | can_make_dynamic_p = TRUE; |
| 8760 | break; |
| 8761 | |
| 8762 | case R_MIPS_NONE: |
| 8763 | case R_MIPS_JALR: |
| 8764 | case R_MICROMIPS_JALR: |
| 8765 | /* These relocations have empty fields and are purely there to |
| 8766 | provide link information. The symbol value doesn't matter. */ |
| 8767 | constrain_symbol_p = FALSE; |
| 8768 | break; |
| 8769 | |
| 8770 | case R_MIPS_GPREL16: |
| 8771 | case R_MIPS_GPREL32: |
| 8772 | case R_MIPS16_GPREL: |
| 8773 | case R_MICROMIPS_GPREL16: |
| 8774 | /* GP-relative relocations always resolve to a definition in a |
| 8775 | regular input file, ignoring the one-definition rule. This is |
| 8776 | important for the GP setup sequence in NewABI code, which |
| 8777 | always resolves to a local function even if other relocations |
| 8778 | against the symbol wouldn't. */ |
| 8779 | constrain_symbol_p = FALSE; |
| 8780 | break; |
| 8781 | |
| 8782 | case R_MIPS_32: |
| 8783 | case R_MIPS_REL32: |
| 8784 | case R_MIPS_64: |
| 8785 | /* In VxWorks executables, references to external symbols |
| 8786 | must be handled using copy relocs or PLT entries; it is not |
| 8787 | possible to convert this relocation into a dynamic one. |
| 8788 | |
| 8789 | For executables that use PLTs and copy-relocs, we have a |
| 8790 | choice between converting the relocation into a dynamic |
| 8791 | one or using copy relocations or PLT entries. It is |
| 8792 | usually better to do the former, unless the relocation is |
| 8793 | against a read-only section. */ |
| 8794 | if ((bfd_link_pic (info) |
| 8795 | || (h != NULL |
| 8796 | && !htab->is_vxworks |
| 8797 | && strcmp (h->root.root.string, "__gnu_local_gp") != 0 |
| 8798 | && !(!info->nocopyreloc |
| 8799 | && !PIC_OBJECT_P (abfd) |
| 8800 | && MIPS_ELF_READONLY_SECTION (sec)))) |
| 8801 | && (sec->flags & SEC_ALLOC) != 0) |
| 8802 | { |
| 8803 | can_make_dynamic_p = TRUE; |
| 8804 | if (dynobj == NULL) |
| 8805 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 8806 | } |
| 8807 | break; |
| 8808 | |
| 8809 | case R_MIPS_26: |
| 8810 | case R_MIPS_PC16: |
| 8811 | case R_MIPS_PC21_S2: |
| 8812 | case R_MIPS_PC26_S2: |
| 8813 | case R_MIPS16_26: |
| 8814 | case R_MIPS16_PC16_S1: |
| 8815 | case R_MICROMIPS_26_S1: |
| 8816 | case R_MICROMIPS_PC7_S1: |
| 8817 | case R_MICROMIPS_PC10_S1: |
| 8818 | case R_MICROMIPS_PC16_S1: |
| 8819 | case R_MICROMIPS_PC23_S2: |
| 8820 | call_reloc_p = TRUE; |
| 8821 | break; |
| 8822 | } |
| 8823 | |
| 8824 | if (h) |
| 8825 | { |
| 8826 | if (constrain_symbol_p) |
| 8827 | { |
| 8828 | if (!can_make_dynamic_p) |
| 8829 | ((struct mips_elf_link_hash_entry *) h)->has_static_relocs = 1; |
| 8830 | |
| 8831 | if (!call_reloc_p) |
| 8832 | h->pointer_equality_needed = 1; |
| 8833 | |
| 8834 | /* We must not create a stub for a symbol that has |
| 8835 | relocations related to taking the function's address. |
| 8836 | This doesn't apply to VxWorks, where CALL relocs refer |
| 8837 | to a .got.plt entry instead of a normal .got entry. */ |
| 8838 | if (!htab->is_vxworks && (!can_make_dynamic_p || !call_reloc_p)) |
| 8839 | ((struct mips_elf_link_hash_entry *) h)->no_fn_stub = TRUE; |
| 8840 | } |
| 8841 | |
| 8842 | /* Relocations against the special VxWorks __GOTT_BASE__ and |
| 8843 | __GOTT_INDEX__ symbols must be left to the loader. Allocate |
| 8844 | room for them in .rela.dyn. */ |
| 8845 | if (is_gott_symbol (info, h)) |
| 8846 | { |
| 8847 | if (sreloc == NULL) |
| 8848 | { |
| 8849 | sreloc = mips_elf_rel_dyn_section (info, TRUE); |
| 8850 | if (sreloc == NULL) |
| 8851 | return FALSE; |
| 8852 | } |
| 8853 | mips_elf_allocate_dynamic_relocations (dynobj, info, 1); |
| 8854 | if (MIPS_ELF_READONLY_SECTION (sec)) |
| 8855 | /* We tell the dynamic linker that there are |
| 8856 | relocations against the text segment. */ |
| 8857 | info->flags |= DF_TEXTREL; |
| 8858 | } |
| 8859 | } |
| 8860 | else if (call_lo16_reloc_p (r_type) |
| 8861 | || got_lo16_reloc_p (r_type) |
| 8862 | || got_disp_reloc_p (r_type) |
| 8863 | || (got16_reloc_p (r_type) && htab->is_vxworks)) |
| 8864 | { |
| 8865 | /* We may need a local GOT entry for this relocation. We |
| 8866 | don't count R_MIPS_GOT_PAGE because we can estimate the |
| 8867 | maximum number of pages needed by looking at the size of |
| 8868 | the segment. Similar comments apply to R_MIPS*_GOT16 and |
| 8869 | R_MIPS*_CALL16, except on VxWorks, where GOT relocations |
| 8870 | always evaluate to "G". We don't count R_MIPS_GOT_HI16, or |
| 8871 | R_MIPS_CALL_HI16 because these are always followed by an |
| 8872 | R_MIPS_GOT_LO16 or R_MIPS_CALL_LO16. */ |
| 8873 | if (!mips_elf_record_local_got_symbol (abfd, r_symndx, |
| 8874 | rel->r_addend, info, r_type)) |
| 8875 | return FALSE; |
| 8876 | } |
| 8877 | |
| 8878 | if (h != NULL |
| 8879 | && mips_elf_relocation_needs_la25_stub (abfd, r_type, |
| 8880 | ELF_ST_IS_MIPS16 (h->other))) |
| 8881 | ((struct mips_elf_link_hash_entry *) h)->has_nonpic_branches = TRUE; |
| 8882 | |
| 8883 | switch (r_type) |
| 8884 | { |
| 8885 | case R_MIPS_CALL16: |
| 8886 | case R_MIPS16_CALL16: |
| 8887 | case R_MICROMIPS_CALL16: |
| 8888 | if (h == NULL) |
| 8889 | { |
| 8890 | _bfd_error_handler |
| 8891 | /* xgettext:c-format */ |
| 8892 | (_("%pB: CALL16 reloc at %#" PRIx64 " not against global symbol"), |
| 8893 | abfd, (uint64_t) rel->r_offset); |
| 8894 | bfd_set_error (bfd_error_bad_value); |
| 8895 | return FALSE; |
| 8896 | } |
| 8897 | /* Fall through. */ |
| 8898 | |
| 8899 | case R_MIPS_CALL_HI16: |
| 8900 | case R_MIPS_CALL_LO16: |
| 8901 | case R_MICROMIPS_CALL_HI16: |
| 8902 | case R_MICROMIPS_CALL_LO16: |
| 8903 | if (h != NULL) |
| 8904 | { |
| 8905 | /* Make sure there is room in the regular GOT to hold the |
| 8906 | function's address. We may eliminate it in favour of |
| 8907 | a .got.plt entry later; see mips_elf_count_got_symbols. */ |
| 8908 | if (!mips_elf_record_global_got_symbol (h, abfd, info, TRUE, |
| 8909 | r_type)) |
| 8910 | return FALSE; |
| 8911 | |
| 8912 | /* We need a stub, not a plt entry for the undefined |
| 8913 | function. But we record it as if it needs plt. See |
| 8914 | _bfd_elf_adjust_dynamic_symbol. */ |
| 8915 | h->needs_plt = 1; |
| 8916 | h->type = STT_FUNC; |
| 8917 | } |
| 8918 | break; |
| 8919 | |
| 8920 | case R_MIPS_GOT_PAGE: |
| 8921 | case R_MICROMIPS_GOT_PAGE: |
| 8922 | case R_MIPS16_GOT16: |
| 8923 | case R_MIPS_GOT16: |
| 8924 | case R_MIPS_GOT_HI16: |
| 8925 | case R_MIPS_GOT_LO16: |
| 8926 | case R_MICROMIPS_GOT16: |
| 8927 | case R_MICROMIPS_GOT_HI16: |
| 8928 | case R_MICROMIPS_GOT_LO16: |
| 8929 | if (!h || got_page_reloc_p (r_type)) |
| 8930 | { |
| 8931 | /* This relocation needs (or may need, if h != NULL) a |
| 8932 | page entry in the GOT. For R_MIPS_GOT_PAGE we do not |
| 8933 | know for sure until we know whether the symbol is |
| 8934 | preemptible. */ |
| 8935 | if (mips_elf_rel_relocation_p (abfd, sec, relocs, rel)) |
| 8936 | { |
| 8937 | if (!mips_elf_get_section_contents (abfd, sec, &contents)) |
| 8938 | return FALSE; |
| 8939 | howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, r_type, FALSE); |
| 8940 | addend = mips_elf_read_rel_addend (abfd, rel, |
| 8941 | howto, contents); |
| 8942 | if (got16_reloc_p (r_type)) |
| 8943 | mips_elf_add_lo16_rel_addend (abfd, rel, rel_end, |
| 8944 | contents, &addend); |
| 8945 | else |
| 8946 | addend <<= howto->rightshift; |
| 8947 | } |
| 8948 | else |
| 8949 | addend = rel->r_addend; |
| 8950 | if (!mips_elf_record_got_page_ref (info, abfd, r_symndx, |
| 8951 | h, addend)) |
| 8952 | return FALSE; |
| 8953 | |
| 8954 | if (h) |
| 8955 | { |
| 8956 | struct mips_elf_link_hash_entry *hmips = |
| 8957 | (struct mips_elf_link_hash_entry *) h; |
| 8958 | |
| 8959 | /* This symbol is definitely not overridable. */ |
| 8960 | if (hmips->root.def_regular |
| 8961 | && ! (bfd_link_pic (info) && ! info->symbolic |
| 8962 | && ! hmips->root.forced_local)) |
| 8963 | h = NULL; |
| 8964 | } |
| 8965 | } |
| 8966 | /* If this is a global, overridable symbol, GOT_PAGE will |
| 8967 | decay to GOT_DISP, so we'll need a GOT entry for it. */ |
| 8968 | /* Fall through. */ |
| 8969 | |
| 8970 | case R_MIPS_GOT_DISP: |
| 8971 | case R_MICROMIPS_GOT_DISP: |
| 8972 | if (h && !mips_elf_record_global_got_symbol (h, abfd, info, |
| 8973 | FALSE, r_type)) |
| 8974 | return FALSE; |
| 8975 | break; |
| 8976 | |
| 8977 | case R_MIPS_TLS_GOTTPREL: |
| 8978 | case R_MIPS16_TLS_GOTTPREL: |
| 8979 | case R_MICROMIPS_TLS_GOTTPREL: |
| 8980 | if (bfd_link_pic (info)) |
| 8981 | info->flags |= DF_STATIC_TLS; |
| 8982 | /* Fall through */ |
| 8983 | |
| 8984 | case R_MIPS_TLS_LDM: |
| 8985 | case R_MIPS16_TLS_LDM: |
| 8986 | case R_MICROMIPS_TLS_LDM: |
| 8987 | if (tls_ldm_reloc_p (r_type)) |
| 8988 | { |
| 8989 | r_symndx = STN_UNDEF; |
| 8990 | h = NULL; |
| 8991 | } |
| 8992 | /* Fall through */ |
| 8993 | |
| 8994 | case R_MIPS_TLS_GD: |
| 8995 | case R_MIPS16_TLS_GD: |
| 8996 | case R_MICROMIPS_TLS_GD: |
| 8997 | /* This symbol requires a global offset table entry, or two |
| 8998 | for TLS GD relocations. */ |
| 8999 | if (h != NULL) |
| 9000 | { |
| 9001 | if (!mips_elf_record_global_got_symbol (h, abfd, info, |
| 9002 | FALSE, r_type)) |
| 9003 | return FALSE; |
| 9004 | } |
| 9005 | else |
| 9006 | { |
| 9007 | if (!mips_elf_record_local_got_symbol (abfd, r_symndx, |
| 9008 | rel->r_addend, |
| 9009 | info, r_type)) |
| 9010 | return FALSE; |
| 9011 | } |
| 9012 | break; |
| 9013 | |
| 9014 | case R_MIPS_32: |
| 9015 | case R_MIPS_REL32: |
| 9016 | case R_MIPS_64: |
| 9017 | /* In VxWorks executables, references to external symbols |
| 9018 | are handled using copy relocs or PLT stubs, so there's |
| 9019 | no need to add a .rela.dyn entry for this relocation. */ |
| 9020 | if (can_make_dynamic_p) |
| 9021 | { |
| 9022 | if (sreloc == NULL) |
| 9023 | { |
| 9024 | sreloc = mips_elf_rel_dyn_section (info, TRUE); |
| 9025 | if (sreloc == NULL) |
| 9026 | return FALSE; |
| 9027 | } |
| 9028 | if (bfd_link_pic (info) && h == NULL) |
| 9029 | { |
| 9030 | /* When creating a shared object, we must copy these |
| 9031 | reloc types into the output file as R_MIPS_REL32 |
| 9032 | relocs. Make room for this reloc in .rel(a).dyn. */ |
| 9033 | mips_elf_allocate_dynamic_relocations (dynobj, info, 1); |
| 9034 | if (MIPS_ELF_READONLY_SECTION (sec)) |
| 9035 | /* We tell the dynamic linker that there are |
| 9036 | relocations against the text segment. */ |
| 9037 | info->flags |= DF_TEXTREL; |
| 9038 | } |
| 9039 | else |
| 9040 | { |
| 9041 | struct mips_elf_link_hash_entry *hmips; |
| 9042 | |
| 9043 | /* For a shared object, we must copy this relocation |
| 9044 | unless the symbol turns out to be undefined and |
| 9045 | weak with non-default visibility, in which case |
| 9046 | it will be left as zero. |
| 9047 | |
| 9048 | We could elide R_MIPS_REL32 for locally binding symbols |
| 9049 | in shared libraries, but do not yet do so. |
| 9050 | |
| 9051 | For an executable, we only need to copy this |
| 9052 | reloc if the symbol is defined in a dynamic |
| 9053 | object. */ |
| 9054 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 9055 | ++hmips->possibly_dynamic_relocs; |
| 9056 | if (MIPS_ELF_READONLY_SECTION (sec)) |
| 9057 | /* We need it to tell the dynamic linker if there |
| 9058 | are relocations against the text segment. */ |
| 9059 | hmips->readonly_reloc = TRUE; |
| 9060 | } |
| 9061 | } |
| 9062 | |
| 9063 | if (SGI_COMPAT (abfd)) |
| 9064 | mips_elf_hash_table (info)->compact_rel_size += |
| 9065 | sizeof (Elf32_External_crinfo); |
| 9066 | break; |
| 9067 | |
| 9068 | case R_MIPS_26: |
| 9069 | case R_MIPS_GPREL16: |
| 9070 | case R_MIPS_LITERAL: |
| 9071 | case R_MIPS_GPREL32: |
| 9072 | case R_MICROMIPS_26_S1: |
| 9073 | case R_MICROMIPS_GPREL16: |
| 9074 | case R_MICROMIPS_LITERAL: |
| 9075 | case R_MICROMIPS_GPREL7_S2: |
| 9076 | if (SGI_COMPAT (abfd)) |
| 9077 | mips_elf_hash_table (info)->compact_rel_size += |
| 9078 | sizeof (Elf32_External_crinfo); |
| 9079 | break; |
| 9080 | |
| 9081 | /* This relocation describes the C++ object vtable hierarchy. |
| 9082 | Reconstruct it for later use during GC. */ |
| 9083 | case R_MIPS_GNU_VTINHERIT: |
| 9084 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 9085 | return FALSE; |
| 9086 | break; |
| 9087 | |
| 9088 | /* This relocation describes which C++ vtable entries are actually |
| 9089 | used. Record for later use during GC. */ |
| 9090 | case R_MIPS_GNU_VTENTRY: |
| 9091 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
| 9092 | return FALSE; |
| 9093 | break; |
| 9094 | |
| 9095 | default: |
| 9096 | break; |
| 9097 | } |
| 9098 | |
| 9099 | /* Record the need for a PLT entry. At this point we don't know |
| 9100 | yet if we are going to create a PLT in the first place, but |
| 9101 | we only record whether the relocation requires a standard MIPS |
| 9102 | or a compressed code entry anyway. If we don't make a PLT after |
| 9103 | all, then we'll just ignore these arrangements. Likewise if |
| 9104 | a PLT entry is not created because the symbol is satisfied |
| 9105 | locally. */ |
| 9106 | if (h != NULL |
| 9107 | && (branch_reloc_p (r_type) |
| 9108 | || mips16_branch_reloc_p (r_type) |
| 9109 | || micromips_branch_reloc_p (r_type)) |
| 9110 | && !SYMBOL_CALLS_LOCAL (info, h)) |
| 9111 | { |
| 9112 | if (h->plt.plist == NULL) |
| 9113 | h->plt.plist = mips_elf_make_plt_record (abfd); |
| 9114 | if (h->plt.plist == NULL) |
| 9115 | return FALSE; |
| 9116 | |
| 9117 | if (branch_reloc_p (r_type)) |
| 9118 | h->plt.plist->need_mips = TRUE; |
| 9119 | else |
| 9120 | h->plt.plist->need_comp = TRUE; |
| 9121 | } |
| 9122 | |
| 9123 | /* See if this reloc would need to refer to a MIPS16 hard-float stub, |
| 9124 | if there is one. We only need to handle global symbols here; |
| 9125 | we decide whether to keep or delete stubs for local symbols |
| 9126 | when processing the stub's relocations. */ |
| 9127 | if (h != NULL |
| 9128 | && !mips16_call_reloc_p (r_type) |
| 9129 | && !section_allows_mips16_refs_p (sec)) |
| 9130 | { |
| 9131 | struct mips_elf_link_hash_entry *mh; |
| 9132 | |
| 9133 | mh = (struct mips_elf_link_hash_entry *) h; |
| 9134 | mh->need_fn_stub = TRUE; |
| 9135 | } |
| 9136 | |
| 9137 | /* Refuse some position-dependent relocations when creating a |
| 9138 | shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're |
| 9139 | not PIC, but we can create dynamic relocations and the result |
| 9140 | will be fine. Also do not refuse R_MIPS_LO16, which can be |
| 9141 | combined with R_MIPS_GOT16. */ |
| 9142 | if (bfd_link_pic (info)) |
| 9143 | { |
| 9144 | switch (r_type) |
| 9145 | { |
| 9146 | case R_MIPS_TLS_TPREL_HI16: |
| 9147 | case R_MIPS16_TLS_TPREL_HI16: |
| 9148 | case R_MICROMIPS_TLS_TPREL_HI16: |
| 9149 | case R_MIPS_TLS_TPREL_LO16: |
| 9150 | case R_MIPS16_TLS_TPREL_LO16: |
| 9151 | case R_MICROMIPS_TLS_TPREL_LO16: |
| 9152 | /* These are okay in PIE, but not in a shared library. */ |
| 9153 | if (bfd_link_executable (info)) |
| 9154 | break; |
| 9155 | |
| 9156 | /* FALLTHROUGH */ |
| 9157 | |
| 9158 | case R_MIPS16_HI16: |
| 9159 | case R_MIPS_HI16: |
| 9160 | case R_MIPS_HIGHER: |
| 9161 | case R_MIPS_HIGHEST: |
| 9162 | case R_MICROMIPS_HI16: |
| 9163 | case R_MICROMIPS_HIGHER: |
| 9164 | case R_MICROMIPS_HIGHEST: |
| 9165 | /* Don't refuse a high part relocation if it's against |
| 9166 | no symbol (e.g. part of a compound relocation). */ |
| 9167 | if (r_symndx == STN_UNDEF) |
| 9168 | break; |
| 9169 | |
| 9170 | /* Likewise an absolute symbol. */ |
| 9171 | if (h != NULL && bfd_is_abs_symbol (&h->root)) |
| 9172 | break; |
| 9173 | |
| 9174 | /* R_MIPS_HI16 against _gp_disp is used for $gp setup, |
| 9175 | and has a special meaning. */ |
| 9176 | if (!NEWABI_P (abfd) && h != NULL |
| 9177 | && strcmp (h->root.root.string, "_gp_disp") == 0) |
| 9178 | break; |
| 9179 | |
| 9180 | /* Likewise __GOTT_BASE__ and __GOTT_INDEX__ on VxWorks. */ |
| 9181 | if (is_gott_symbol (info, h)) |
| 9182 | break; |
| 9183 | |
| 9184 | /* FALLTHROUGH */ |
| 9185 | |
| 9186 | case R_MIPS16_26: |
| 9187 | case R_MIPS_26: |
| 9188 | case R_MICROMIPS_26_S1: |
| 9189 | howto = MIPS_ELF_RTYPE_TO_HOWTO (abfd, r_type, NEWABI_P (abfd)); |
| 9190 | /* An error for unsupported relocations is raised as part |
| 9191 | of the above search, so we can skip the following. */ |
| 9192 | if (howto != NULL) |
| 9193 | info->callbacks->einfo |
| 9194 | /* xgettext:c-format */ |
| 9195 | (_("%X%H: relocation %s against `%s' cannot be used" |
| 9196 | " when making a shared object; recompile with -fPIC\n"), |
| 9197 | abfd, sec, rel->r_offset, howto->name, |
| 9198 | (h) ? h->root.root.string : "a local symbol"); |
| 9199 | break; |
| 9200 | default: |
| 9201 | break; |
| 9202 | } |
| 9203 | } |
| 9204 | } |
| 9205 | |
| 9206 | return TRUE; |
| 9207 | } |
| 9208 | \f |
| 9209 | /* Allocate space for global sym dynamic relocs. */ |
| 9210 | |
| 9211 | static bfd_boolean |
| 9212 | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| 9213 | { |
| 9214 | struct bfd_link_info *info = inf; |
| 9215 | bfd *dynobj; |
| 9216 | struct mips_elf_link_hash_entry *hmips; |
| 9217 | struct mips_elf_link_hash_table *htab; |
| 9218 | |
| 9219 | htab = mips_elf_hash_table (info); |
| 9220 | BFD_ASSERT (htab != NULL); |
| 9221 | |
| 9222 | dynobj = elf_hash_table (info)->dynobj; |
| 9223 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 9224 | |
| 9225 | /* VxWorks executables are handled elsewhere; we only need to |
| 9226 | allocate relocations in shared objects. */ |
| 9227 | if (htab->is_vxworks && !bfd_link_pic (info)) |
| 9228 | return TRUE; |
| 9229 | |
| 9230 | /* Ignore indirect symbols. All relocations against such symbols |
| 9231 | will be redirected to the target symbol. */ |
| 9232 | if (h->root.type == bfd_link_hash_indirect) |
| 9233 | return TRUE; |
| 9234 | |
| 9235 | /* If this symbol is defined in a dynamic object, or we are creating |
| 9236 | a shared library, we will need to copy any R_MIPS_32 or |
| 9237 | R_MIPS_REL32 relocs against it into the output file. */ |
| 9238 | if (! bfd_link_relocatable (info) |
| 9239 | && hmips->possibly_dynamic_relocs != 0 |
| 9240 | && (h->root.type == bfd_link_hash_defweak |
| 9241 | || (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
| 9242 | || bfd_link_pic (info))) |
| 9243 | { |
| 9244 | bfd_boolean do_copy = TRUE; |
| 9245 | |
| 9246 | if (h->root.type == bfd_link_hash_undefweak) |
| 9247 | { |
| 9248 | /* Do not copy relocations for undefined weak symbols that |
| 9249 | we are not going to export. */ |
| 9250 | if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 9251 | do_copy = FALSE; |
| 9252 | |
| 9253 | /* Make sure undefined weak symbols are output as a dynamic |
| 9254 | symbol in PIEs. */ |
| 9255 | else if (h->dynindx == -1 && !h->forced_local) |
| 9256 | { |
| 9257 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 9258 | return FALSE; |
| 9259 | } |
| 9260 | } |
| 9261 | |
| 9262 | if (do_copy) |
| 9263 | { |
| 9264 | /* Even though we don't directly need a GOT entry for this symbol, |
| 9265 | the SVR4 psABI requires it to have a dynamic symbol table |
| 9266 | index greater that DT_MIPS_GOTSYM if there are dynamic |
| 9267 | relocations against it. |
| 9268 | |
| 9269 | VxWorks does not enforce the same mapping between the GOT |
| 9270 | and the symbol table, so the same requirement does not |
| 9271 | apply there. */ |
| 9272 | if (!htab->is_vxworks) |
| 9273 | { |
| 9274 | if (hmips->global_got_area > GGA_RELOC_ONLY) |
| 9275 | hmips->global_got_area = GGA_RELOC_ONLY; |
| 9276 | hmips->got_only_for_calls = FALSE; |
| 9277 | } |
| 9278 | |
| 9279 | mips_elf_allocate_dynamic_relocations |
| 9280 | (dynobj, info, hmips->possibly_dynamic_relocs); |
| 9281 | if (hmips->readonly_reloc) |
| 9282 | /* We tell the dynamic linker that there are relocations |
| 9283 | against the text segment. */ |
| 9284 | info->flags |= DF_TEXTREL; |
| 9285 | } |
| 9286 | } |
| 9287 | |
| 9288 | return TRUE; |
| 9289 | } |
| 9290 | |
| 9291 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 9292 | regular object. The current definition is in some section of the |
| 9293 | dynamic object, but we're not including those sections. We have to |
| 9294 | change the definition to something the rest of the link can |
| 9295 | understand. */ |
| 9296 | |
| 9297 | bfd_boolean |
| 9298 | _bfd_mips_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 9299 | struct elf_link_hash_entry *h) |
| 9300 | { |
| 9301 | bfd *dynobj; |
| 9302 | struct mips_elf_link_hash_entry *hmips; |
| 9303 | struct mips_elf_link_hash_table *htab; |
| 9304 | asection *s, *srel; |
| 9305 | |
| 9306 | htab = mips_elf_hash_table (info); |
| 9307 | BFD_ASSERT (htab != NULL); |
| 9308 | |
| 9309 | dynobj = elf_hash_table (info)->dynobj; |
| 9310 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 9311 | |
| 9312 | /* Make sure we know what is going on here. */ |
| 9313 | BFD_ASSERT (dynobj != NULL |
| 9314 | && (h->needs_plt |
| 9315 | || h->is_weakalias |
| 9316 | || (h->def_dynamic |
| 9317 | && h->ref_regular |
| 9318 | && !h->def_regular))); |
| 9319 | |
| 9320 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 9321 | |
| 9322 | /* If there are call relocations against an externally-defined symbol, |
| 9323 | see whether we can create a MIPS lazy-binding stub for it. We can |
| 9324 | only do this if all references to the function are through call |
| 9325 | relocations, and in that case, the traditional lazy-binding stubs |
| 9326 | are much more efficient than PLT entries. |
| 9327 | |
| 9328 | Traditional stubs are only available on SVR4 psABI-based systems; |
| 9329 | VxWorks always uses PLTs instead. */ |
| 9330 | if (!htab->is_vxworks && h->needs_plt && !hmips->no_fn_stub) |
| 9331 | { |
| 9332 | if (! elf_hash_table (info)->dynamic_sections_created) |
| 9333 | return TRUE; |
| 9334 | |
| 9335 | /* If this symbol is not defined in a regular file, then set |
| 9336 | the symbol to the stub location. This is required to make |
| 9337 | function pointers compare as equal between the normal |
| 9338 | executable and the shared library. */ |
| 9339 | if (!h->def_regular |
| 9340 | && !bfd_is_abs_section (htab->sstubs->output_section)) |
| 9341 | { |
| 9342 | hmips->needs_lazy_stub = TRUE; |
| 9343 | htab->lazy_stub_count++; |
| 9344 | return TRUE; |
| 9345 | } |
| 9346 | } |
| 9347 | /* As above, VxWorks requires PLT entries for externally-defined |
| 9348 | functions that are only accessed through call relocations. |
| 9349 | |
| 9350 | Both VxWorks and non-VxWorks targets also need PLT entries if there |
| 9351 | are static-only relocations against an externally-defined function. |
| 9352 | This can technically occur for shared libraries if there are |
| 9353 | branches to the symbol, although it is unlikely that this will be |
| 9354 | used in practice due to the short ranges involved. It can occur |
| 9355 | for any relative or absolute relocation in executables; in that |
| 9356 | case, the PLT entry becomes the function's canonical address. */ |
| 9357 | else if (((h->needs_plt && !hmips->no_fn_stub) |
| 9358 | || (h->type == STT_FUNC && hmips->has_static_relocs)) |
| 9359 | && htab->use_plts_and_copy_relocs |
| 9360 | && !SYMBOL_CALLS_LOCAL (info, h) |
| 9361 | && !(ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 9362 | && h->root.type == bfd_link_hash_undefweak)) |
| 9363 | { |
| 9364 | bfd_boolean micromips_p = MICROMIPS_P (info->output_bfd); |
| 9365 | bfd_boolean newabi_p = NEWABI_P (info->output_bfd); |
| 9366 | |
| 9367 | /* If this is the first symbol to need a PLT entry, then make some |
| 9368 | basic setup. Also work out PLT entry sizes. We'll need them |
| 9369 | for PLT offset calculations. */ |
| 9370 | if (htab->plt_mips_offset + htab->plt_comp_offset == 0) |
| 9371 | { |
| 9372 | BFD_ASSERT (htab->root.sgotplt->size == 0); |
| 9373 | BFD_ASSERT (htab->plt_got_index == 0); |
| 9374 | |
| 9375 | /* If we're using the PLT additions to the psABI, each PLT |
| 9376 | entry is 16 bytes and the PLT0 entry is 32 bytes. |
| 9377 | Encourage better cache usage by aligning. We do this |
| 9378 | lazily to avoid pessimizing traditional objects. */ |
| 9379 | if (!htab->is_vxworks |
| 9380 | && !bfd_set_section_alignment (htab->root.splt, 5)) |
| 9381 | return FALSE; |
| 9382 | |
| 9383 | /* Make sure that .got.plt is word-aligned. We do this lazily |
| 9384 | for the same reason as above. */ |
| 9385 | if (!bfd_set_section_alignment (htab->root.sgotplt, |
| 9386 | MIPS_ELF_LOG_FILE_ALIGN (dynobj))) |
| 9387 | return FALSE; |
| 9388 | |
| 9389 | /* On non-VxWorks targets, the first two entries in .got.plt |
| 9390 | are reserved. */ |
| 9391 | if (!htab->is_vxworks) |
| 9392 | htab->plt_got_index |
| 9393 | += (get_elf_backend_data (dynobj)->got_header_size |
| 9394 | / MIPS_ELF_GOT_SIZE (dynobj)); |
| 9395 | |
| 9396 | /* On VxWorks, also allocate room for the header's |
| 9397 | .rela.plt.unloaded entries. */ |
| 9398 | if (htab->is_vxworks && !bfd_link_pic (info)) |
| 9399 | htab->srelplt2->size += 2 * sizeof (Elf32_External_Rela); |
| 9400 | |
| 9401 | /* Now work out the sizes of individual PLT entries. */ |
| 9402 | if (htab->is_vxworks && bfd_link_pic (info)) |
| 9403 | htab->plt_mips_entry_size |
| 9404 | = 4 * ARRAY_SIZE (mips_vxworks_shared_plt_entry); |
| 9405 | else if (htab->is_vxworks) |
| 9406 | htab->plt_mips_entry_size |
| 9407 | = 4 * ARRAY_SIZE (mips_vxworks_exec_plt_entry); |
| 9408 | else if (newabi_p) |
| 9409 | htab->plt_mips_entry_size |
| 9410 | = 4 * ARRAY_SIZE (mips_exec_plt_entry); |
| 9411 | else if (!micromips_p) |
| 9412 | { |
| 9413 | htab->plt_mips_entry_size |
| 9414 | = 4 * ARRAY_SIZE (mips_exec_plt_entry); |
| 9415 | htab->plt_comp_entry_size |
| 9416 | = 2 * ARRAY_SIZE (mips16_o32_exec_plt_entry); |
| 9417 | } |
| 9418 | else if (htab->insn32) |
| 9419 | { |
| 9420 | htab->plt_mips_entry_size |
| 9421 | = 4 * ARRAY_SIZE (mips_exec_plt_entry); |
| 9422 | htab->plt_comp_entry_size |
| 9423 | = 2 * ARRAY_SIZE (micromips_insn32_o32_exec_plt_entry); |
| 9424 | } |
| 9425 | else |
| 9426 | { |
| 9427 | htab->plt_mips_entry_size |
| 9428 | = 4 * ARRAY_SIZE (mips_exec_plt_entry); |
| 9429 | htab->plt_comp_entry_size |
| 9430 | = 2 * ARRAY_SIZE (micromips_o32_exec_plt_entry); |
| 9431 | } |
| 9432 | } |
| 9433 | |
| 9434 | if (h->plt.plist == NULL) |
| 9435 | h->plt.plist = mips_elf_make_plt_record (dynobj); |
| 9436 | if (h->plt.plist == NULL) |
| 9437 | return FALSE; |
| 9438 | |
| 9439 | /* There are no defined MIPS16 or microMIPS PLT entries for VxWorks, |
| 9440 | n32 or n64, so always use a standard entry there. |
| 9441 | |
| 9442 | If the symbol has a MIPS16 call stub and gets a PLT entry, then |
| 9443 | all MIPS16 calls will go via that stub, and there is no benefit |
| 9444 | to having a MIPS16 entry. And in the case of call_stub a |
| 9445 | standard entry actually has to be used as the stub ends with a J |
| 9446 | instruction. */ |
| 9447 | if (newabi_p |
| 9448 | || htab->is_vxworks |
| 9449 | || hmips->call_stub |
| 9450 | || hmips->call_fp_stub) |
| 9451 | { |
| 9452 | h->plt.plist->need_mips = TRUE; |
| 9453 | h->plt.plist->need_comp = FALSE; |
| 9454 | } |
| 9455 | |
| 9456 | /* Otherwise, if there are no direct calls to the function, we |
| 9457 | have a free choice of whether to use standard or compressed |
| 9458 | entries. Prefer microMIPS entries if the object is known to |
| 9459 | contain microMIPS code, so that it becomes possible to create |
| 9460 | pure microMIPS binaries. Prefer standard entries otherwise, |
| 9461 | because MIPS16 ones are no smaller and are usually slower. */ |
| 9462 | if (!h->plt.plist->need_mips && !h->plt.plist->need_comp) |
| 9463 | { |
| 9464 | if (micromips_p) |
| 9465 | h->plt.plist->need_comp = TRUE; |
| 9466 | else |
| 9467 | h->plt.plist->need_mips = TRUE; |
| 9468 | } |
| 9469 | |
| 9470 | if (h->plt.plist->need_mips) |
| 9471 | { |
| 9472 | h->plt.plist->mips_offset = htab->plt_mips_offset; |
| 9473 | htab->plt_mips_offset += htab->plt_mips_entry_size; |
| 9474 | } |
| 9475 | if (h->plt.plist->need_comp) |
| 9476 | { |
| 9477 | h->plt.plist->comp_offset = htab->plt_comp_offset; |
| 9478 | htab->plt_comp_offset += htab->plt_comp_entry_size; |
| 9479 | } |
| 9480 | |
| 9481 | /* Reserve the corresponding .got.plt entry now too. */ |
| 9482 | h->plt.plist->gotplt_index = htab->plt_got_index++; |
| 9483 | |
| 9484 | /* If the output file has no definition of the symbol, set the |
| 9485 | symbol's value to the address of the stub. */ |
| 9486 | if (!bfd_link_pic (info) && !h->def_regular) |
| 9487 | hmips->use_plt_entry = TRUE; |
| 9488 | |
| 9489 | /* Make room for the R_MIPS_JUMP_SLOT relocation. */ |
| 9490 | htab->root.srelplt->size += (htab->is_vxworks |
| 9491 | ? MIPS_ELF_RELA_SIZE (dynobj) |
| 9492 | : MIPS_ELF_REL_SIZE (dynobj)); |
| 9493 | |
| 9494 | /* Make room for the .rela.plt.unloaded relocations. */ |
| 9495 | if (htab->is_vxworks && !bfd_link_pic (info)) |
| 9496 | htab->srelplt2->size += 3 * sizeof (Elf32_External_Rela); |
| 9497 | |
| 9498 | /* All relocations against this symbol that could have been made |
| 9499 | dynamic will now refer to the PLT entry instead. */ |
| 9500 | hmips->possibly_dynamic_relocs = 0; |
| 9501 | |
| 9502 | return TRUE; |
| 9503 | } |
| 9504 | |
| 9505 | /* If this is a weak symbol, and there is a real definition, the |
| 9506 | processor independent code will have arranged for us to see the |
| 9507 | real definition first, and we can just use the same value. */ |
| 9508 | if (h->is_weakalias) |
| 9509 | { |
| 9510 | struct elf_link_hash_entry *def = weakdef (h); |
| 9511 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| 9512 | h->root.u.def.section = def->root.u.def.section; |
| 9513 | h->root.u.def.value = def->root.u.def.value; |
| 9514 | return TRUE; |
| 9515 | } |
| 9516 | |
| 9517 | /* Otherwise, there is nothing further to do for symbols defined |
| 9518 | in regular objects. */ |
| 9519 | if (h->def_regular) |
| 9520 | return TRUE; |
| 9521 | |
| 9522 | /* There's also nothing more to do if we'll convert all relocations |
| 9523 | against this symbol into dynamic relocations. */ |
| 9524 | if (!hmips->has_static_relocs) |
| 9525 | return TRUE; |
| 9526 | |
| 9527 | /* We're now relying on copy relocations. Complain if we have |
| 9528 | some that we can't convert. */ |
| 9529 | if (!htab->use_plts_and_copy_relocs || bfd_link_pic (info)) |
| 9530 | { |
| 9531 | _bfd_error_handler (_("non-dynamic relocations refer to " |
| 9532 | "dynamic symbol %s"), |
| 9533 | h->root.root.string); |
| 9534 | bfd_set_error (bfd_error_bad_value); |
| 9535 | return FALSE; |
| 9536 | } |
| 9537 | |
| 9538 | /* We must allocate the symbol in our .dynbss section, which will |
| 9539 | become part of the .bss section of the executable. There will be |
| 9540 | an entry for this symbol in the .dynsym section. The dynamic |
| 9541 | object will contain position independent code, so all references |
| 9542 | from the dynamic object to this symbol will go through the global |
| 9543 | offset table. The dynamic linker will use the .dynsym entry to |
| 9544 | determine the address it must put in the global offset table, so |
| 9545 | both the dynamic object and the regular object will refer to the |
| 9546 | same memory location for the variable. */ |
| 9547 | |
| 9548 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
| 9549 | { |
| 9550 | s = htab->root.sdynrelro; |
| 9551 | srel = htab->root.sreldynrelro; |
| 9552 | } |
| 9553 | else |
| 9554 | { |
| 9555 | s = htab->root.sdynbss; |
| 9556 | srel = htab->root.srelbss; |
| 9557 | } |
| 9558 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 9559 | { |
| 9560 | if (htab->is_vxworks) |
| 9561 | srel->size += sizeof (Elf32_External_Rela); |
| 9562 | else |
| 9563 | mips_elf_allocate_dynamic_relocations (dynobj, info, 1); |
| 9564 | h->needs_copy = 1; |
| 9565 | } |
| 9566 | |
| 9567 | /* All relocations against this symbol that could have been made |
| 9568 | dynamic will now refer to the local copy instead. */ |
| 9569 | hmips->possibly_dynamic_relocs = 0; |
| 9570 | |
| 9571 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| 9572 | } |
| 9573 | \f |
| 9574 | /* This function is called after all the input files have been read, |
| 9575 | and the input sections have been assigned to output sections. We |
| 9576 | check for any mips16 stub sections that we can discard. */ |
| 9577 | |
| 9578 | bfd_boolean |
| 9579 | _bfd_mips_elf_always_size_sections (bfd *output_bfd, |
| 9580 | struct bfd_link_info *info) |
| 9581 | { |
| 9582 | asection *sect; |
| 9583 | struct mips_elf_link_hash_table *htab; |
| 9584 | struct mips_htab_traverse_info hti; |
| 9585 | |
| 9586 | htab = mips_elf_hash_table (info); |
| 9587 | BFD_ASSERT (htab != NULL); |
| 9588 | |
| 9589 | /* The .reginfo section has a fixed size. */ |
| 9590 | sect = bfd_get_section_by_name (output_bfd, ".reginfo"); |
| 9591 | if (sect != NULL) |
| 9592 | { |
| 9593 | bfd_set_section_size (sect, sizeof (Elf32_External_RegInfo)); |
| 9594 | sect->flags |= SEC_FIXED_SIZE | SEC_HAS_CONTENTS; |
| 9595 | } |
| 9596 | |
| 9597 | /* The .MIPS.abiflags section has a fixed size. */ |
| 9598 | sect = bfd_get_section_by_name (output_bfd, ".MIPS.abiflags"); |
| 9599 | if (sect != NULL) |
| 9600 | { |
| 9601 | bfd_set_section_size (sect, sizeof (Elf_External_ABIFlags_v0)); |
| 9602 | sect->flags |= SEC_FIXED_SIZE | SEC_HAS_CONTENTS; |
| 9603 | } |
| 9604 | |
| 9605 | hti.info = info; |
| 9606 | hti.output_bfd = output_bfd; |
| 9607 | hti.error = FALSE; |
| 9608 | mips_elf_link_hash_traverse (mips_elf_hash_table (info), |
| 9609 | mips_elf_check_symbols, &hti); |
| 9610 | if (hti.error) |
| 9611 | return FALSE; |
| 9612 | |
| 9613 | return TRUE; |
| 9614 | } |
| 9615 | |
| 9616 | /* If the link uses a GOT, lay it out and work out its size. */ |
| 9617 | |
| 9618 | static bfd_boolean |
| 9619 | mips_elf_lay_out_got (bfd *output_bfd, struct bfd_link_info *info) |
| 9620 | { |
| 9621 | bfd *dynobj; |
| 9622 | asection *s; |
| 9623 | struct mips_got_info *g; |
| 9624 | bfd_size_type loadable_size = 0; |
| 9625 | bfd_size_type page_gotno; |
| 9626 | bfd *ibfd; |
| 9627 | struct mips_elf_traverse_got_arg tga; |
| 9628 | struct mips_elf_link_hash_table *htab; |
| 9629 | |
| 9630 | htab = mips_elf_hash_table (info); |
| 9631 | BFD_ASSERT (htab != NULL); |
| 9632 | |
| 9633 | s = htab->root.sgot; |
| 9634 | if (s == NULL) |
| 9635 | return TRUE; |
| 9636 | |
| 9637 | dynobj = elf_hash_table (info)->dynobj; |
| 9638 | g = htab->got_info; |
| 9639 | |
| 9640 | /* Allocate room for the reserved entries. VxWorks always reserves |
| 9641 | 3 entries; other objects only reserve 2 entries. */ |
| 9642 | BFD_ASSERT (g->assigned_low_gotno == 0); |
| 9643 | if (htab->is_vxworks) |
| 9644 | htab->reserved_gotno = 3; |
| 9645 | else |
| 9646 | htab->reserved_gotno = 2; |
| 9647 | g->local_gotno += htab->reserved_gotno; |
| 9648 | g->assigned_low_gotno = htab->reserved_gotno; |
| 9649 | |
| 9650 | /* Decide which symbols need to go in the global part of the GOT and |
| 9651 | count the number of reloc-only GOT symbols. */ |
| 9652 | mips_elf_link_hash_traverse (htab, mips_elf_count_got_symbols, info); |
| 9653 | |
| 9654 | if (!mips_elf_resolve_final_got_entries (info, g)) |
| 9655 | return FALSE; |
| 9656 | |
| 9657 | /* Calculate the total loadable size of the output. That |
| 9658 | will give us the maximum number of GOT_PAGE entries |
| 9659 | required. */ |
| 9660 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) |
| 9661 | { |
| 9662 | asection *subsection; |
| 9663 | |
| 9664 | for (subsection = ibfd->sections; |
| 9665 | subsection; |
| 9666 | subsection = subsection->next) |
| 9667 | { |
| 9668 | if ((subsection->flags & SEC_ALLOC) == 0) |
| 9669 | continue; |
| 9670 | loadable_size += ((subsection->size + 0xf) |
| 9671 | &~ (bfd_size_type) 0xf); |
| 9672 | } |
| 9673 | } |
| 9674 | |
| 9675 | if (htab->is_vxworks) |
| 9676 | /* There's no need to allocate page entries for VxWorks; R_MIPS*_GOT16 |
| 9677 | relocations against local symbols evaluate to "G", and the EABI does |
| 9678 | not include R_MIPS_GOT_PAGE. */ |
| 9679 | page_gotno = 0; |
| 9680 | else |
| 9681 | /* Assume there are two loadable segments consisting of contiguous |
| 9682 | sections. Is 5 enough? */ |
| 9683 | page_gotno = (loadable_size >> 16) + 5; |
| 9684 | |
| 9685 | /* Choose the smaller of the two page estimates; both are intended to be |
| 9686 | conservative. */ |
| 9687 | if (page_gotno > g->page_gotno) |
| 9688 | page_gotno = g->page_gotno; |
| 9689 | |
| 9690 | g->local_gotno += page_gotno; |
| 9691 | g->assigned_high_gotno = g->local_gotno - 1; |
| 9692 | |
| 9693 | s->size += g->local_gotno * MIPS_ELF_GOT_SIZE (output_bfd); |
| 9694 | s->size += g->global_gotno * MIPS_ELF_GOT_SIZE (output_bfd); |
| 9695 | s->size += g->tls_gotno * MIPS_ELF_GOT_SIZE (output_bfd); |
| 9696 | |
| 9697 | /* VxWorks does not support multiple GOTs. It initializes $gp to |
| 9698 | __GOTT_BASE__[__GOTT_INDEX__], the value of which is set by the |
| 9699 | dynamic loader. */ |
| 9700 | if (!htab->is_vxworks && s->size > MIPS_ELF_GOT_MAX_SIZE (info)) |
| 9701 | { |
| 9702 | if (!mips_elf_multi_got (output_bfd, info, s, page_gotno)) |
| 9703 | return FALSE; |
| 9704 | } |
| 9705 | else |
| 9706 | { |
| 9707 | /* Record that all bfds use G. This also has the effect of freeing |
| 9708 | the per-bfd GOTs, which we no longer need. */ |
| 9709 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) |
| 9710 | if (mips_elf_bfd_got (ibfd, FALSE)) |
| 9711 | mips_elf_replace_bfd_got (ibfd, g); |
| 9712 | mips_elf_replace_bfd_got (output_bfd, g); |
| 9713 | |
| 9714 | /* Set up TLS entries. */ |
| 9715 | g->tls_assigned_gotno = g->global_gotno + g->local_gotno; |
| 9716 | tga.info = info; |
| 9717 | tga.g = g; |
| 9718 | tga.value = MIPS_ELF_GOT_SIZE (output_bfd); |
| 9719 | htab_traverse (g->got_entries, mips_elf_initialize_tls_index, &tga); |
| 9720 | if (!tga.g) |
| 9721 | return FALSE; |
| 9722 | BFD_ASSERT (g->tls_assigned_gotno |
| 9723 | == g->global_gotno + g->local_gotno + g->tls_gotno); |
| 9724 | |
| 9725 | /* Each VxWorks GOT entry needs an explicit relocation. */ |
| 9726 | if (htab->is_vxworks && bfd_link_pic (info)) |
| 9727 | g->relocs += g->global_gotno + g->local_gotno - htab->reserved_gotno; |
| 9728 | |
| 9729 | /* Allocate room for the TLS relocations. */ |
| 9730 | if (g->relocs) |
| 9731 | mips_elf_allocate_dynamic_relocations (dynobj, info, g->relocs); |
| 9732 | } |
| 9733 | |
| 9734 | return TRUE; |
| 9735 | } |
| 9736 | |
| 9737 | /* Estimate the size of the .MIPS.stubs section. */ |
| 9738 | |
| 9739 | static void |
| 9740 | mips_elf_estimate_stub_size (bfd *output_bfd, struct bfd_link_info *info) |
| 9741 | { |
| 9742 | struct mips_elf_link_hash_table *htab; |
| 9743 | bfd_size_type dynsymcount; |
| 9744 | |
| 9745 | htab = mips_elf_hash_table (info); |
| 9746 | BFD_ASSERT (htab != NULL); |
| 9747 | |
| 9748 | if (htab->lazy_stub_count == 0) |
| 9749 | return; |
| 9750 | |
| 9751 | /* IRIX rld assumes that a function stub isn't at the end of the .text |
| 9752 | section, so add a dummy entry to the end. */ |
| 9753 | htab->lazy_stub_count++; |
| 9754 | |
| 9755 | /* Get a worst-case estimate of the number of dynamic symbols needed. |
| 9756 | At this point, dynsymcount does not account for section symbols |
| 9757 | and count_section_dynsyms may overestimate the number that will |
| 9758 | be needed. */ |
| 9759 | dynsymcount = (elf_hash_table (info)->dynsymcount |
| 9760 | + count_section_dynsyms (output_bfd, info)); |
| 9761 | |
| 9762 | /* Determine the size of one stub entry. There's no disadvantage |
| 9763 | from using microMIPS code here, so for the sake of pure-microMIPS |
| 9764 | binaries we prefer it whenever there's any microMIPS code in |
| 9765 | output produced at all. This has a benefit of stubs being |
| 9766 | shorter by 4 bytes each too, unless in the insn32 mode. */ |
| 9767 | if (!MICROMIPS_P (output_bfd)) |
| 9768 | htab->function_stub_size = (dynsymcount > 0x10000 |
| 9769 | ? MIPS_FUNCTION_STUB_BIG_SIZE |
| 9770 | : MIPS_FUNCTION_STUB_NORMAL_SIZE); |
| 9771 | else if (htab->insn32) |
| 9772 | htab->function_stub_size = (dynsymcount > 0x10000 |
| 9773 | ? MICROMIPS_INSN32_FUNCTION_STUB_BIG_SIZE |
| 9774 | : MICROMIPS_INSN32_FUNCTION_STUB_NORMAL_SIZE); |
| 9775 | else |
| 9776 | htab->function_stub_size = (dynsymcount > 0x10000 |
| 9777 | ? MICROMIPS_FUNCTION_STUB_BIG_SIZE |
| 9778 | : MICROMIPS_FUNCTION_STUB_NORMAL_SIZE); |
| 9779 | |
| 9780 | htab->sstubs->size = htab->lazy_stub_count * htab->function_stub_size; |
| 9781 | } |
| 9782 | |
| 9783 | /* A mips_elf_link_hash_traverse callback for which DATA points to a |
| 9784 | mips_htab_traverse_info. If H needs a traditional MIPS lazy-binding |
| 9785 | stub, allocate an entry in the stubs section. */ |
| 9786 | |
| 9787 | static bfd_boolean |
| 9788 | mips_elf_allocate_lazy_stub (struct mips_elf_link_hash_entry *h, void *data) |
| 9789 | { |
| 9790 | struct mips_htab_traverse_info *hti = data; |
| 9791 | struct mips_elf_link_hash_table *htab; |
| 9792 | struct bfd_link_info *info; |
| 9793 | bfd *output_bfd; |
| 9794 | |
| 9795 | info = hti->info; |
| 9796 | output_bfd = hti->output_bfd; |
| 9797 | htab = mips_elf_hash_table (info); |
| 9798 | BFD_ASSERT (htab != NULL); |
| 9799 | |
| 9800 | if (h->needs_lazy_stub) |
| 9801 | { |
| 9802 | bfd_boolean micromips_p = MICROMIPS_P (output_bfd); |
| 9803 | unsigned int other = micromips_p ? STO_MICROMIPS : 0; |
| 9804 | bfd_vma isa_bit = micromips_p; |
| 9805 | |
| 9806 | BFD_ASSERT (htab->root.dynobj != NULL); |
| 9807 | if (h->root.plt.plist == NULL) |
| 9808 | h->root.plt.plist = mips_elf_make_plt_record (htab->sstubs->owner); |
| 9809 | if (h->root.plt.plist == NULL) |
| 9810 | { |
| 9811 | hti->error = TRUE; |
| 9812 | return FALSE; |
| 9813 | } |
| 9814 | h->root.root.u.def.section = htab->sstubs; |
| 9815 | h->root.root.u.def.value = htab->sstubs->size + isa_bit; |
| 9816 | h->root.plt.plist->stub_offset = htab->sstubs->size; |
| 9817 | h->root.other = other; |
| 9818 | htab->sstubs->size += htab->function_stub_size; |
| 9819 | } |
| 9820 | return TRUE; |
| 9821 | } |
| 9822 | |
| 9823 | /* Allocate offsets in the stubs section to each symbol that needs one. |
| 9824 | Set the final size of the .MIPS.stub section. */ |
| 9825 | |
| 9826 | static bfd_boolean |
| 9827 | mips_elf_lay_out_lazy_stubs (struct bfd_link_info *info) |
| 9828 | { |
| 9829 | bfd *output_bfd = info->output_bfd; |
| 9830 | bfd_boolean micromips_p = MICROMIPS_P (output_bfd); |
| 9831 | unsigned int other = micromips_p ? STO_MICROMIPS : 0; |
| 9832 | bfd_vma isa_bit = micromips_p; |
| 9833 | struct mips_elf_link_hash_table *htab; |
| 9834 | struct mips_htab_traverse_info hti; |
| 9835 | struct elf_link_hash_entry *h; |
| 9836 | bfd *dynobj; |
| 9837 | |
| 9838 | htab = mips_elf_hash_table (info); |
| 9839 | BFD_ASSERT (htab != NULL); |
| 9840 | |
| 9841 | if (htab->lazy_stub_count == 0) |
| 9842 | return TRUE; |
| 9843 | |
| 9844 | htab->sstubs->size = 0; |
| 9845 | hti.info = info; |
| 9846 | hti.output_bfd = output_bfd; |
| 9847 | hti.error = FALSE; |
| 9848 | mips_elf_link_hash_traverse (htab, mips_elf_allocate_lazy_stub, &hti); |
| 9849 | if (hti.error) |
| 9850 | return FALSE; |
| 9851 | htab->sstubs->size += htab->function_stub_size; |
| 9852 | BFD_ASSERT (htab->sstubs->size |
| 9853 | == htab->lazy_stub_count * htab->function_stub_size); |
| 9854 | |
| 9855 | dynobj = elf_hash_table (info)->dynobj; |
| 9856 | BFD_ASSERT (dynobj != NULL); |
| 9857 | h = _bfd_elf_define_linkage_sym (dynobj, info, htab->sstubs, "_MIPS_STUBS_"); |
| 9858 | if (h == NULL) |
| 9859 | return FALSE; |
| 9860 | h->root.u.def.value = isa_bit; |
| 9861 | h->other = other; |
| 9862 | h->type = STT_FUNC; |
| 9863 | |
| 9864 | return TRUE; |
| 9865 | } |
| 9866 | |
| 9867 | /* A mips_elf_link_hash_traverse callback for which DATA points to a |
| 9868 | bfd_link_info. If H uses the address of a PLT entry as the value |
| 9869 | of the symbol, then set the entry in the symbol table now. Prefer |
| 9870 | a standard MIPS PLT entry. */ |
| 9871 | |
| 9872 | static bfd_boolean |
| 9873 | mips_elf_set_plt_sym_value (struct mips_elf_link_hash_entry *h, void *data) |
| 9874 | { |
| 9875 | struct bfd_link_info *info = data; |
| 9876 | bfd_boolean micromips_p = MICROMIPS_P (info->output_bfd); |
| 9877 | struct mips_elf_link_hash_table *htab; |
| 9878 | unsigned int other; |
| 9879 | bfd_vma isa_bit; |
| 9880 | bfd_vma val; |
| 9881 | |
| 9882 | htab = mips_elf_hash_table (info); |
| 9883 | BFD_ASSERT (htab != NULL); |
| 9884 | |
| 9885 | if (h->use_plt_entry) |
| 9886 | { |
| 9887 | BFD_ASSERT (h->root.plt.plist != NULL); |
| 9888 | BFD_ASSERT (h->root.plt.plist->mips_offset != MINUS_ONE |
| 9889 | || h->root.plt.plist->comp_offset != MINUS_ONE); |
| 9890 | |
| 9891 | val = htab->plt_header_size; |
| 9892 | if (h->root.plt.plist->mips_offset != MINUS_ONE) |
| 9893 | { |
| 9894 | isa_bit = 0; |
| 9895 | val += h->root.plt.plist->mips_offset; |
| 9896 | other = 0; |
| 9897 | } |
| 9898 | else |
| 9899 | { |
| 9900 | isa_bit = 1; |
| 9901 | val += htab->plt_mips_offset + h->root.plt.plist->comp_offset; |
| 9902 | other = micromips_p ? STO_MICROMIPS : STO_MIPS16; |
| 9903 | } |
| 9904 | val += isa_bit; |
| 9905 | /* For VxWorks, point at the PLT load stub rather than the lazy |
| 9906 | resolution stub; this stub will become the canonical function |
| 9907 | address. */ |
| 9908 | if (htab->is_vxworks) |
| 9909 | val += 8; |
| 9910 | |
| 9911 | h->root.root.u.def.section = htab->root.splt; |
| 9912 | h->root.root.u.def.value = val; |
| 9913 | h->root.other = other; |
| 9914 | } |
| 9915 | |
| 9916 | return TRUE; |
| 9917 | } |
| 9918 | |
| 9919 | /* Set the sizes of the dynamic sections. */ |
| 9920 | |
| 9921 | bfd_boolean |
| 9922 | _bfd_mips_elf_size_dynamic_sections (bfd *output_bfd, |
| 9923 | struct bfd_link_info *info) |
| 9924 | { |
| 9925 | bfd *dynobj; |
| 9926 | asection *s, *sreldyn; |
| 9927 | bfd_boolean reltext; |
| 9928 | struct mips_elf_link_hash_table *htab; |
| 9929 | |
| 9930 | htab = mips_elf_hash_table (info); |
| 9931 | BFD_ASSERT (htab != NULL); |
| 9932 | dynobj = elf_hash_table (info)->dynobj; |
| 9933 | BFD_ASSERT (dynobj != NULL); |
| 9934 | |
| 9935 | if (elf_hash_table (info)->dynamic_sections_created) |
| 9936 | { |
| 9937 | /* Set the contents of the .interp section to the interpreter. */ |
| 9938 | if (bfd_link_executable (info) && !info->nointerp) |
| 9939 | { |
| 9940 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 9941 | BFD_ASSERT (s != NULL); |
| 9942 | s->size |
| 9943 | = strlen (ELF_DYNAMIC_INTERPRETER (output_bfd)) + 1; |
| 9944 | s->contents |
| 9945 | = (bfd_byte *) ELF_DYNAMIC_INTERPRETER (output_bfd); |
| 9946 | } |
| 9947 | |
| 9948 | /* Figure out the size of the PLT header if we know that we |
| 9949 | are using it. For the sake of cache alignment always use |
| 9950 | a standard header whenever any standard entries are present |
| 9951 | even if microMIPS entries are present as well. This also |
| 9952 | lets the microMIPS header rely on the value of $v0 only set |
| 9953 | by microMIPS entries, for a small size reduction. |
| 9954 | |
| 9955 | Set symbol table entry values for symbols that use the |
| 9956 | address of their PLT entry now that we can calculate it. |
| 9957 | |
| 9958 | Also create the _PROCEDURE_LINKAGE_TABLE_ symbol if we |
| 9959 | haven't already in _bfd_elf_create_dynamic_sections. */ |
| 9960 | if (htab->root.splt && htab->plt_mips_offset + htab->plt_comp_offset != 0) |
| 9961 | { |
| 9962 | bfd_boolean micromips_p = (MICROMIPS_P (output_bfd) |
| 9963 | && !htab->plt_mips_offset); |
| 9964 | unsigned int other = micromips_p ? STO_MICROMIPS : 0; |
| 9965 | bfd_vma isa_bit = micromips_p; |
| 9966 | struct elf_link_hash_entry *h; |
| 9967 | bfd_vma size; |
| 9968 | |
| 9969 | BFD_ASSERT (htab->use_plts_and_copy_relocs); |
| 9970 | BFD_ASSERT (htab->root.sgotplt->size == 0); |
| 9971 | BFD_ASSERT (htab->root.splt->size == 0); |
| 9972 | |
| 9973 | if (htab->is_vxworks && bfd_link_pic (info)) |
| 9974 | size = 4 * ARRAY_SIZE (mips_vxworks_shared_plt0_entry); |
| 9975 | else if (htab->is_vxworks) |
| 9976 | size = 4 * ARRAY_SIZE (mips_vxworks_exec_plt0_entry); |
| 9977 | else if (ABI_64_P (output_bfd)) |
| 9978 | size = 4 * ARRAY_SIZE (mips_n64_exec_plt0_entry); |
| 9979 | else if (ABI_N32_P (output_bfd)) |
| 9980 | size = 4 * ARRAY_SIZE (mips_n32_exec_plt0_entry); |
| 9981 | else if (!micromips_p) |
| 9982 | size = 4 * ARRAY_SIZE (mips_o32_exec_plt0_entry); |
| 9983 | else if (htab->insn32) |
| 9984 | size = 2 * ARRAY_SIZE (micromips_insn32_o32_exec_plt0_entry); |
| 9985 | else |
| 9986 | size = 2 * ARRAY_SIZE (micromips_o32_exec_plt0_entry); |
| 9987 | |
| 9988 | htab->plt_header_is_comp = micromips_p; |
| 9989 | htab->plt_header_size = size; |
| 9990 | htab->root.splt->size = (size |
| 9991 | + htab->plt_mips_offset |
| 9992 | + htab->plt_comp_offset); |
| 9993 | htab->root.sgotplt->size = (htab->plt_got_index |
| 9994 | * MIPS_ELF_GOT_SIZE (dynobj)); |
| 9995 | |
| 9996 | mips_elf_link_hash_traverse (htab, mips_elf_set_plt_sym_value, info); |
| 9997 | |
| 9998 | if (htab->root.hplt == NULL) |
| 9999 | { |
| 10000 | h = _bfd_elf_define_linkage_sym (dynobj, info, htab->root.splt, |
| 10001 | "_PROCEDURE_LINKAGE_TABLE_"); |
| 10002 | htab->root.hplt = h; |
| 10003 | if (h == NULL) |
| 10004 | return FALSE; |
| 10005 | } |
| 10006 | |
| 10007 | h = htab->root.hplt; |
| 10008 | h->root.u.def.value = isa_bit; |
| 10009 | h->other = other; |
| 10010 | h->type = STT_FUNC; |
| 10011 | } |
| 10012 | } |
| 10013 | |
| 10014 | /* Allocate space for global sym dynamic relocs. */ |
| 10015 | elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); |
| 10016 | |
| 10017 | mips_elf_estimate_stub_size (output_bfd, info); |
| 10018 | |
| 10019 | if (!mips_elf_lay_out_got (output_bfd, info)) |
| 10020 | return FALSE; |
| 10021 | |
| 10022 | mips_elf_lay_out_lazy_stubs (info); |
| 10023 | |
| 10024 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 10025 | determined the sizes of the various dynamic sections. Allocate |
| 10026 | memory for them. */ |
| 10027 | reltext = FALSE; |
| 10028 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 10029 | { |
| 10030 | const char *name; |
| 10031 | |
| 10032 | /* It's OK to base decisions on the section name, because none |
| 10033 | of the dynobj section names depend upon the input files. */ |
| 10034 | name = bfd_section_name (s); |
| 10035 | |
| 10036 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 10037 | continue; |
| 10038 | |
| 10039 | if (CONST_STRNEQ (name, ".rel")) |
| 10040 | { |
| 10041 | if (s->size != 0) |
| 10042 | { |
| 10043 | const char *outname; |
| 10044 | asection *target; |
| 10045 | |
| 10046 | /* If this relocation section applies to a read only |
| 10047 | section, then we probably need a DT_TEXTREL entry. |
| 10048 | If the relocation section is .rel(a).dyn, we always |
| 10049 | assert a DT_TEXTREL entry rather than testing whether |
| 10050 | there exists a relocation to a read only section or |
| 10051 | not. */ |
| 10052 | outname = bfd_section_name (s->output_section); |
| 10053 | target = bfd_get_section_by_name (output_bfd, outname + 4); |
| 10054 | if ((target != NULL |
| 10055 | && (target->flags & SEC_READONLY) != 0 |
| 10056 | && (target->flags & SEC_ALLOC) != 0) |
| 10057 | || strcmp (outname, MIPS_ELF_REL_DYN_NAME (info)) == 0) |
| 10058 | reltext = TRUE; |
| 10059 | |
| 10060 | /* We use the reloc_count field as a counter if we need |
| 10061 | to copy relocs into the output file. */ |
| 10062 | if (strcmp (name, MIPS_ELF_REL_DYN_NAME (info)) != 0) |
| 10063 | s->reloc_count = 0; |
| 10064 | |
| 10065 | /* If combreloc is enabled, elf_link_sort_relocs() will |
| 10066 | sort relocations, but in a different way than we do, |
| 10067 | and before we're done creating relocations. Also, it |
| 10068 | will move them around between input sections' |
| 10069 | relocation's contents, so our sorting would be |
| 10070 | broken, so don't let it run. */ |
| 10071 | info->combreloc = 0; |
| 10072 | } |
| 10073 | } |
| 10074 | else if (bfd_link_executable (info) |
| 10075 | && ! mips_elf_hash_table (info)->use_rld_obj_head |
| 10076 | && CONST_STRNEQ (name, ".rld_map")) |
| 10077 | { |
| 10078 | /* We add a room for __rld_map. It will be filled in by the |
| 10079 | rtld to contain a pointer to the _r_debug structure. */ |
| 10080 | s->size += MIPS_ELF_RLD_MAP_SIZE (output_bfd); |
| 10081 | } |
| 10082 | else if (SGI_COMPAT (output_bfd) |
| 10083 | && CONST_STRNEQ (name, ".compact_rel")) |
| 10084 | s->size += mips_elf_hash_table (info)->compact_rel_size; |
| 10085 | else if (s == htab->root.splt) |
| 10086 | { |
| 10087 | /* If the last PLT entry has a branch delay slot, allocate |
| 10088 | room for an extra nop to fill the delay slot. This is |
| 10089 | for CPUs without load interlocking. */ |
| 10090 | if (! LOAD_INTERLOCKS_P (output_bfd) |
| 10091 | && ! htab->is_vxworks && s->size > 0) |
| 10092 | s->size += 4; |
| 10093 | } |
| 10094 | else if (! CONST_STRNEQ (name, ".init") |
| 10095 | && s != htab->root.sgot |
| 10096 | && s != htab->root.sgotplt |
| 10097 | && s != htab->sstubs |
| 10098 | && s != htab->root.sdynbss |
| 10099 | && s != htab->root.sdynrelro) |
| 10100 | { |
| 10101 | /* It's not one of our sections, so don't allocate space. */ |
| 10102 | continue; |
| 10103 | } |
| 10104 | |
| 10105 | if (s->size == 0) |
| 10106 | { |
| 10107 | s->flags |= SEC_EXCLUDE; |
| 10108 | continue; |
| 10109 | } |
| 10110 | |
| 10111 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 10112 | continue; |
| 10113 | |
| 10114 | /* Allocate memory for the section contents. */ |
| 10115 | s->contents = bfd_zalloc (dynobj, s->size); |
| 10116 | if (s->contents == NULL) |
| 10117 | { |
| 10118 | bfd_set_error (bfd_error_no_memory); |
| 10119 | return FALSE; |
| 10120 | } |
| 10121 | } |
| 10122 | |
| 10123 | if (elf_hash_table (info)->dynamic_sections_created) |
| 10124 | { |
| 10125 | /* Add some entries to the .dynamic section. We fill in the |
| 10126 | values later, in _bfd_mips_elf_finish_dynamic_sections, but we |
| 10127 | must add the entries now so that we get the correct size for |
| 10128 | the .dynamic section. */ |
| 10129 | |
| 10130 | /* SGI object has the equivalence of DT_DEBUG in the |
| 10131 | DT_MIPS_RLD_MAP entry. This must come first because glibc |
| 10132 | only fills in DT_MIPS_RLD_MAP (not DT_DEBUG) and some tools |
| 10133 | may only look at the first one they see. */ |
| 10134 | if (!bfd_link_pic (info) |
| 10135 | && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_MAP, 0)) |
| 10136 | return FALSE; |
| 10137 | |
| 10138 | if (bfd_link_executable (info) |
| 10139 | && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_MAP_REL, 0)) |
| 10140 | return FALSE; |
| 10141 | |
| 10142 | /* The DT_DEBUG entry may be filled in by the dynamic linker and |
| 10143 | used by the debugger. */ |
| 10144 | if (bfd_link_executable (info) |
| 10145 | && !SGI_COMPAT (output_bfd) |
| 10146 | && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0)) |
| 10147 | return FALSE; |
| 10148 | |
| 10149 | if (reltext && (SGI_COMPAT (output_bfd) || htab->is_vxworks)) |
| 10150 | info->flags |= DF_TEXTREL; |
| 10151 | |
| 10152 | if ((info->flags & DF_TEXTREL) != 0) |
| 10153 | { |
| 10154 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_TEXTREL, 0)) |
| 10155 | return FALSE; |
| 10156 | |
| 10157 | /* Clear the DF_TEXTREL flag. It will be set again if we |
| 10158 | write out an actual text relocation; we may not, because |
| 10159 | at this point we do not know whether e.g. any .eh_frame |
| 10160 | absolute relocations have been converted to PC-relative. */ |
| 10161 | info->flags &= ~DF_TEXTREL; |
| 10162 | } |
| 10163 | |
| 10164 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTGOT, 0)) |
| 10165 | return FALSE; |
| 10166 | |
| 10167 | sreldyn = mips_elf_rel_dyn_section (info, FALSE); |
| 10168 | if (htab->is_vxworks) |
| 10169 | { |
| 10170 | /* VxWorks uses .rela.dyn instead of .rel.dyn. It does not |
| 10171 | use any of the DT_MIPS_* tags. */ |
| 10172 | if (sreldyn && sreldyn->size > 0) |
| 10173 | { |
| 10174 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELA, 0)) |
| 10175 | return FALSE; |
| 10176 | |
| 10177 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELASZ, 0)) |
| 10178 | return FALSE; |
| 10179 | |
| 10180 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELAENT, 0)) |
| 10181 | return FALSE; |
| 10182 | } |
| 10183 | } |
| 10184 | else |
| 10185 | { |
| 10186 | if (sreldyn && sreldyn->size > 0 |
| 10187 | && !bfd_is_abs_section (sreldyn->output_section)) |
| 10188 | { |
| 10189 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_REL, 0)) |
| 10190 | return FALSE; |
| 10191 | |
| 10192 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELSZ, 0)) |
| 10193 | return FALSE; |
| 10194 | |
| 10195 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELENT, 0)) |
| 10196 | return FALSE; |
| 10197 | } |
| 10198 | |
| 10199 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_VERSION, 0)) |
| 10200 | return FALSE; |
| 10201 | |
| 10202 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_FLAGS, 0)) |
| 10203 | return FALSE; |
| 10204 | |
| 10205 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_BASE_ADDRESS, 0)) |
| 10206 | return FALSE; |
| 10207 | |
| 10208 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_LOCAL_GOTNO, 0)) |
| 10209 | return FALSE; |
| 10210 | |
| 10211 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_SYMTABNO, 0)) |
| 10212 | return FALSE; |
| 10213 | |
| 10214 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_UNREFEXTNO, 0)) |
| 10215 | return FALSE; |
| 10216 | |
| 10217 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_GOTSYM, 0)) |
| 10218 | return FALSE; |
| 10219 | |
| 10220 | if (info->emit_gnu_hash |
| 10221 | && ! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_XHASH, 0)) |
| 10222 | return FALSE; |
| 10223 | |
| 10224 | if (IRIX_COMPAT (dynobj) == ict_irix5 |
| 10225 | && ! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_HIPAGENO, 0)) |
| 10226 | return FALSE; |
| 10227 | |
| 10228 | if (IRIX_COMPAT (dynobj) == ict_irix6 |
| 10229 | && (bfd_get_section_by_name |
| 10230 | (output_bfd, MIPS_ELF_OPTIONS_SECTION_NAME (dynobj))) |
| 10231 | && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_OPTIONS, 0)) |
| 10232 | return FALSE; |
| 10233 | } |
| 10234 | if (htab->root.splt->size > 0) |
| 10235 | { |
| 10236 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTREL, 0)) |
| 10237 | return FALSE; |
| 10238 | |
| 10239 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_JMPREL, 0)) |
| 10240 | return FALSE; |
| 10241 | |
| 10242 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTRELSZ, 0)) |
| 10243 | return FALSE; |
| 10244 | |
| 10245 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_PLTGOT, 0)) |
| 10246 | return FALSE; |
| 10247 | } |
| 10248 | if (htab->is_vxworks |
| 10249 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
| 10250 | return FALSE; |
| 10251 | } |
| 10252 | |
| 10253 | return TRUE; |
| 10254 | } |
| 10255 | \f |
| 10256 | /* REL is a relocation in INPUT_BFD that is being copied to OUTPUT_BFD. |
| 10257 | Adjust its R_ADDEND field so that it is correct for the output file. |
| 10258 | LOCAL_SYMS and LOCAL_SECTIONS are arrays of INPUT_BFD's local symbols |
| 10259 | and sections respectively; both use symbol indexes. */ |
| 10260 | |
| 10261 | static void |
| 10262 | mips_elf_adjust_addend (bfd *output_bfd, struct bfd_link_info *info, |
| 10263 | bfd *input_bfd, Elf_Internal_Sym *local_syms, |
| 10264 | asection **local_sections, Elf_Internal_Rela *rel) |
| 10265 | { |
| 10266 | unsigned int r_type, r_symndx; |
| 10267 | Elf_Internal_Sym *sym; |
| 10268 | asection *sec; |
| 10269 | |
| 10270 | if (mips_elf_local_relocation_p (input_bfd, rel, local_sections)) |
| 10271 | { |
| 10272 | r_type = ELF_R_TYPE (output_bfd, rel->r_info); |
| 10273 | if (gprel16_reloc_p (r_type) |
| 10274 | || r_type == R_MIPS_GPREL32 |
| 10275 | || literal_reloc_p (r_type)) |
| 10276 | { |
| 10277 | rel->r_addend += _bfd_get_gp_value (input_bfd); |
| 10278 | rel->r_addend -= _bfd_get_gp_value (output_bfd); |
| 10279 | } |
| 10280 | |
| 10281 | r_symndx = ELF_R_SYM (output_bfd, rel->r_info); |
| 10282 | sym = local_syms + r_symndx; |
| 10283 | |
| 10284 | /* Adjust REL's addend to account for section merging. */ |
| 10285 | if (!bfd_link_relocatable (info)) |
| 10286 | { |
| 10287 | sec = local_sections[r_symndx]; |
| 10288 | _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 10289 | } |
| 10290 | |
| 10291 | /* This would normally be done by the rela_normal code in elflink.c. */ |
| 10292 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 10293 | rel->r_addend += local_sections[r_symndx]->output_offset; |
| 10294 | } |
| 10295 | } |
| 10296 | |
| 10297 | /* Handle relocations against symbols from removed linkonce sections, |
| 10298 | or sections discarded by a linker script. We use this wrapper around |
| 10299 | RELOC_AGAINST_DISCARDED_SECTION to handle triplets of compound relocs |
| 10300 | on 64-bit ELF targets. In this case for any relocation handled, which |
| 10301 | always be the first in a triplet, the remaining two have to be processed |
| 10302 | together with the first, even if they are R_MIPS_NONE. It is the symbol |
| 10303 | index referred by the first reloc that applies to all the three and the |
| 10304 | remaining two never refer to an object symbol. And it is the final |
| 10305 | relocation (the last non-null one) that determines the output field of |
| 10306 | the whole relocation so retrieve the corresponding howto structure for |
| 10307 | the relocatable field to be cleared by RELOC_AGAINST_DISCARDED_SECTION. |
| 10308 | |
| 10309 | Note that RELOC_AGAINST_DISCARDED_SECTION is a macro that uses "continue" |
| 10310 | and therefore requires to be pasted in a loop. It also defines a block |
| 10311 | and does not protect any of its arguments, hence the extra brackets. */ |
| 10312 | |
| 10313 | static void |
| 10314 | mips_reloc_against_discarded_section (bfd *output_bfd, |
| 10315 | struct bfd_link_info *info, |
| 10316 | bfd *input_bfd, asection *input_section, |
| 10317 | Elf_Internal_Rela **rel, |
| 10318 | const Elf_Internal_Rela **relend, |
| 10319 | bfd_boolean rel_reloc, |
| 10320 | reloc_howto_type *howto, |
| 10321 | bfd_byte *contents) |
| 10322 | { |
| 10323 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
| 10324 | int count = bed->s->int_rels_per_ext_rel; |
| 10325 | unsigned int r_type; |
| 10326 | int i; |
| 10327 | |
| 10328 | for (i = count - 1; i > 0; i--) |
| 10329 | { |
| 10330 | r_type = ELF_R_TYPE (output_bfd, (*rel)[i].r_info); |
| 10331 | if (r_type != R_MIPS_NONE) |
| 10332 | { |
| 10333 | howto = MIPS_ELF_RTYPE_TO_HOWTO (input_bfd, r_type, !rel_reloc); |
| 10334 | break; |
| 10335 | } |
| 10336 | } |
| 10337 | do |
| 10338 | { |
| 10339 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 10340 | (*rel), count, (*relend), |
| 10341 | howto, i, contents); |
| 10342 | } |
| 10343 | while (0); |
| 10344 | } |
| 10345 | |
| 10346 | /* Relocate a MIPS ELF section. */ |
| 10347 | |
| 10348 | bfd_boolean |
| 10349 | _bfd_mips_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
| 10350 | bfd *input_bfd, asection *input_section, |
| 10351 | bfd_byte *contents, Elf_Internal_Rela *relocs, |
| 10352 | Elf_Internal_Sym *local_syms, |
| 10353 | asection **local_sections) |
| 10354 | { |
| 10355 | Elf_Internal_Rela *rel; |
| 10356 | const Elf_Internal_Rela *relend; |
| 10357 | bfd_vma addend = 0; |
| 10358 | bfd_boolean use_saved_addend_p = FALSE; |
| 10359 | |
| 10360 | relend = relocs + input_section->reloc_count; |
| 10361 | for (rel = relocs; rel < relend; ++rel) |
| 10362 | { |
| 10363 | const char *name; |
| 10364 | bfd_vma value = 0; |
| 10365 | reloc_howto_type *howto; |
| 10366 | bfd_boolean cross_mode_jump_p = FALSE; |
| 10367 | /* TRUE if the relocation is a RELA relocation, rather than a |
| 10368 | REL relocation. */ |
| 10369 | bfd_boolean rela_relocation_p = TRUE; |
| 10370 | unsigned int r_type = ELF_R_TYPE (output_bfd, rel->r_info); |
| 10371 | const char *msg; |
| 10372 | unsigned long r_symndx; |
| 10373 | asection *sec; |
| 10374 | Elf_Internal_Shdr *symtab_hdr; |
| 10375 | struct elf_link_hash_entry *h; |
| 10376 | bfd_boolean rel_reloc; |
| 10377 | |
| 10378 | rel_reloc = (NEWABI_P (input_bfd) |
| 10379 | && mips_elf_rel_relocation_p (input_bfd, input_section, |
| 10380 | relocs, rel)); |
| 10381 | /* Find the relocation howto for this relocation. */ |
| 10382 | howto = MIPS_ELF_RTYPE_TO_HOWTO (input_bfd, r_type, !rel_reloc); |
| 10383 | |
| 10384 | r_symndx = ELF_R_SYM (input_bfd, rel->r_info); |
| 10385 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 10386 | if (mips_elf_local_relocation_p (input_bfd, rel, local_sections)) |
| 10387 | { |
| 10388 | sec = local_sections[r_symndx]; |
| 10389 | h = NULL; |
| 10390 | } |
| 10391 | else |
| 10392 | { |
| 10393 | unsigned long extsymoff; |
| 10394 | |
| 10395 | extsymoff = 0; |
| 10396 | if (!elf_bad_symtab (input_bfd)) |
| 10397 | extsymoff = symtab_hdr->sh_info; |
| 10398 | h = elf_sym_hashes (input_bfd) [r_symndx - extsymoff]; |
| 10399 | while (h->root.type == bfd_link_hash_indirect |
| 10400 | || h->root.type == bfd_link_hash_warning) |
| 10401 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 10402 | |
| 10403 | sec = NULL; |
| 10404 | if (h->root.type == bfd_link_hash_defined |
| 10405 | || h->root.type == bfd_link_hash_defweak) |
| 10406 | sec = h->root.u.def.section; |
| 10407 | } |
| 10408 | |
| 10409 | if (sec != NULL && discarded_section (sec)) |
| 10410 | { |
| 10411 | mips_reloc_against_discarded_section (output_bfd, info, input_bfd, |
| 10412 | input_section, &rel, &relend, |
| 10413 | rel_reloc, howto, contents); |
| 10414 | continue; |
| 10415 | } |
| 10416 | |
| 10417 | if (r_type == R_MIPS_64 && ! NEWABI_P (input_bfd)) |
| 10418 | { |
| 10419 | /* Some 32-bit code uses R_MIPS_64. In particular, people use |
| 10420 | 64-bit code, but make sure all their addresses are in the |
| 10421 | lowermost or uppermost 32-bit section of the 64-bit address |
| 10422 | space. Thus, when they use an R_MIPS_64 they mean what is |
| 10423 | usually meant by R_MIPS_32, with the exception that the |
| 10424 | stored value is sign-extended to 64 bits. */ |
| 10425 | howto = MIPS_ELF_RTYPE_TO_HOWTO (input_bfd, R_MIPS_32, FALSE); |
| 10426 | |
| 10427 | /* On big-endian systems, we need to lie about the position |
| 10428 | of the reloc. */ |
| 10429 | if (bfd_big_endian (input_bfd)) |
| 10430 | rel->r_offset += 4; |
| 10431 | } |
| 10432 | |
| 10433 | if (!use_saved_addend_p) |
| 10434 | { |
| 10435 | /* If these relocations were originally of the REL variety, |
| 10436 | we must pull the addend out of the field that will be |
| 10437 | relocated. Otherwise, we simply use the contents of the |
| 10438 | RELA relocation. */ |
| 10439 | if (mips_elf_rel_relocation_p (input_bfd, input_section, |
| 10440 | relocs, rel)) |
| 10441 | { |
| 10442 | rela_relocation_p = FALSE; |
| 10443 | addend = mips_elf_read_rel_addend (input_bfd, rel, |
| 10444 | howto, contents); |
| 10445 | if (hi16_reloc_p (r_type) |
| 10446 | || (got16_reloc_p (r_type) |
| 10447 | && mips_elf_local_relocation_p (input_bfd, rel, |
| 10448 | local_sections))) |
| 10449 | { |
| 10450 | if (!mips_elf_add_lo16_rel_addend (input_bfd, rel, relend, |
| 10451 | contents, &addend)) |
| 10452 | { |
| 10453 | if (h) |
| 10454 | name = h->root.root.string; |
| 10455 | else |
| 10456 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
| 10457 | local_syms + r_symndx, |
| 10458 | sec); |
| 10459 | _bfd_error_handler |
| 10460 | /* xgettext:c-format */ |
| 10461 | (_("%pB: can't find matching LO16 reloc against `%s'" |
| 10462 | " for %s at %#" PRIx64 " in section `%pA'"), |
| 10463 | input_bfd, name, |
| 10464 | howto->name, (uint64_t) rel->r_offset, input_section); |
| 10465 | } |
| 10466 | } |
| 10467 | else |
| 10468 | addend <<= howto->rightshift; |
| 10469 | } |
| 10470 | else |
| 10471 | addend = rel->r_addend; |
| 10472 | mips_elf_adjust_addend (output_bfd, info, input_bfd, |
| 10473 | local_syms, local_sections, rel); |
| 10474 | } |
| 10475 | |
| 10476 | if (bfd_link_relocatable (info)) |
| 10477 | { |
| 10478 | if (r_type == R_MIPS_64 && ! NEWABI_P (output_bfd) |
| 10479 | && bfd_big_endian (input_bfd)) |
| 10480 | rel->r_offset -= 4; |
| 10481 | |
| 10482 | if (!rela_relocation_p && rel->r_addend) |
| 10483 | { |
| 10484 | addend += rel->r_addend; |
| 10485 | if (hi16_reloc_p (r_type) || got16_reloc_p (r_type)) |
| 10486 | addend = mips_elf_high (addend); |
| 10487 | else if (r_type == R_MIPS_HIGHER) |
| 10488 | addend = mips_elf_higher (addend); |
| 10489 | else if (r_type == R_MIPS_HIGHEST) |
| 10490 | addend = mips_elf_highest (addend); |
| 10491 | else |
| 10492 | addend >>= howto->rightshift; |
| 10493 | |
| 10494 | /* We use the source mask, rather than the destination |
| 10495 | mask because the place to which we are writing will be |
| 10496 | source of the addend in the final link. */ |
| 10497 | addend &= howto->src_mask; |
| 10498 | |
| 10499 | if (r_type == R_MIPS_64 && ! NEWABI_P (output_bfd)) |
| 10500 | /* See the comment above about using R_MIPS_64 in the 32-bit |
| 10501 | ABI. Here, we need to update the addend. It would be |
| 10502 | possible to get away with just using the R_MIPS_32 reloc |
| 10503 | but for endianness. */ |
| 10504 | { |
| 10505 | bfd_vma sign_bits; |
| 10506 | bfd_vma low_bits; |
| 10507 | bfd_vma high_bits; |
| 10508 | |
| 10509 | if (addend & ((bfd_vma) 1 << 31)) |
| 10510 | #ifdef BFD64 |
| 10511 | sign_bits = ((bfd_vma) 1 << 32) - 1; |
| 10512 | #else |
| 10513 | sign_bits = -1; |
| 10514 | #endif |
| 10515 | else |
| 10516 | sign_bits = 0; |
| 10517 | |
| 10518 | /* If we don't know that we have a 64-bit type, |
| 10519 | do two separate stores. */ |
| 10520 | if (bfd_big_endian (input_bfd)) |
| 10521 | { |
| 10522 | /* Store the sign-bits (which are most significant) |
| 10523 | first. */ |
| 10524 | low_bits = sign_bits; |
| 10525 | high_bits = addend; |
| 10526 | } |
| 10527 | else |
| 10528 | { |
| 10529 | low_bits = addend; |
| 10530 | high_bits = sign_bits; |
| 10531 | } |
| 10532 | bfd_put_32 (input_bfd, low_bits, |
| 10533 | contents + rel->r_offset); |
| 10534 | bfd_put_32 (input_bfd, high_bits, |
| 10535 | contents + rel->r_offset + 4); |
| 10536 | continue; |
| 10537 | } |
| 10538 | |
| 10539 | if (! mips_elf_perform_relocation (info, howto, rel, addend, |
| 10540 | input_bfd, input_section, |
| 10541 | contents, FALSE)) |
| 10542 | return FALSE; |
| 10543 | } |
| 10544 | |
| 10545 | /* Go on to the next relocation. */ |
| 10546 | continue; |
| 10547 | } |
| 10548 | |
| 10549 | /* In the N32 and 64-bit ABIs there may be multiple consecutive |
| 10550 | relocations for the same offset. In that case we are |
| 10551 | supposed to treat the output of each relocation as the addend |
| 10552 | for the next. */ |
| 10553 | if (rel + 1 < relend |
| 10554 | && rel->r_offset == rel[1].r_offset |
| 10555 | && ELF_R_TYPE (input_bfd, rel[1].r_info) != R_MIPS_NONE) |
| 10556 | use_saved_addend_p = TRUE; |
| 10557 | else |
| 10558 | use_saved_addend_p = FALSE; |
| 10559 | |
| 10560 | /* Figure out what value we are supposed to relocate. */ |
| 10561 | switch (mips_elf_calculate_relocation (output_bfd, input_bfd, |
| 10562 | input_section, contents, |
| 10563 | info, rel, addend, howto, |
| 10564 | local_syms, local_sections, |
| 10565 | &value, &name, &cross_mode_jump_p, |
| 10566 | use_saved_addend_p)) |
| 10567 | { |
| 10568 | case bfd_reloc_continue: |
| 10569 | /* There's nothing to do. */ |
| 10570 | continue; |
| 10571 | |
| 10572 | case bfd_reloc_undefined: |
| 10573 | /* mips_elf_calculate_relocation already called the |
| 10574 | undefined_symbol callback. There's no real point in |
| 10575 | trying to perform the relocation at this point, so we |
| 10576 | just skip ahead to the next relocation. */ |
| 10577 | continue; |
| 10578 | |
| 10579 | case bfd_reloc_notsupported: |
| 10580 | msg = _("internal error: unsupported relocation error"); |
| 10581 | info->callbacks->warning |
| 10582 | (info, msg, name, input_bfd, input_section, rel->r_offset); |
| 10583 | return FALSE; |
| 10584 | |
| 10585 | case bfd_reloc_overflow: |
| 10586 | if (use_saved_addend_p) |
| 10587 | /* Ignore overflow until we reach the last relocation for |
| 10588 | a given location. */ |
| 10589 | ; |
| 10590 | else |
| 10591 | { |
| 10592 | struct mips_elf_link_hash_table *htab; |
| 10593 | |
| 10594 | htab = mips_elf_hash_table (info); |
| 10595 | BFD_ASSERT (htab != NULL); |
| 10596 | BFD_ASSERT (name != NULL); |
| 10597 | if (!htab->small_data_overflow_reported |
| 10598 | && (gprel16_reloc_p (howto->type) |
| 10599 | || literal_reloc_p (howto->type))) |
| 10600 | { |
| 10601 | msg = _("small-data section exceeds 64KB;" |
| 10602 | " lower small-data size limit (see option -G)"); |
| 10603 | |
| 10604 | htab->small_data_overflow_reported = TRUE; |
| 10605 | (*info->callbacks->einfo) ("%P: %s\n", msg); |
| 10606 | } |
| 10607 | (*info->callbacks->reloc_overflow) |
| 10608 | (info, NULL, name, howto->name, (bfd_vma) 0, |
| 10609 | input_bfd, input_section, rel->r_offset); |
| 10610 | } |
| 10611 | break; |
| 10612 | |
| 10613 | case bfd_reloc_ok: |
| 10614 | break; |
| 10615 | |
| 10616 | case bfd_reloc_outofrange: |
| 10617 | msg = NULL; |
| 10618 | if (jal_reloc_p (howto->type)) |
| 10619 | msg = (cross_mode_jump_p |
| 10620 | ? _("cannot convert a jump to JALX " |
| 10621 | "for a non-word-aligned address") |
| 10622 | : (howto->type == R_MIPS16_26 |
| 10623 | ? _("jump to a non-word-aligned address") |
| 10624 | : _("jump to a non-instruction-aligned address"))); |
| 10625 | else if (b_reloc_p (howto->type)) |
| 10626 | msg = (cross_mode_jump_p |
| 10627 | ? _("cannot convert a branch to JALX " |
| 10628 | "for a non-word-aligned address") |
| 10629 | : _("branch to a non-instruction-aligned address")); |
| 10630 | else if (aligned_pcrel_reloc_p (howto->type)) |
| 10631 | msg = _("PC-relative load from unaligned address"); |
| 10632 | if (msg) |
| 10633 | { |
| 10634 | info->callbacks->einfo |
| 10635 | ("%X%H: %s\n", input_bfd, input_section, rel->r_offset, msg); |
| 10636 | break; |
| 10637 | } |
| 10638 | /* Fall through. */ |
| 10639 | |
| 10640 | default: |
| 10641 | abort (); |
| 10642 | break; |
| 10643 | } |
| 10644 | |
| 10645 | /* If we've got another relocation for the address, keep going |
| 10646 | until we reach the last one. */ |
| 10647 | if (use_saved_addend_p) |
| 10648 | { |
| 10649 | addend = value; |
| 10650 | continue; |
| 10651 | } |
| 10652 | |
| 10653 | if (r_type == R_MIPS_64 && ! NEWABI_P (output_bfd)) |
| 10654 | /* See the comment above about using R_MIPS_64 in the 32-bit |
| 10655 | ABI. Until now, we've been using the HOWTO for R_MIPS_32; |
| 10656 | that calculated the right value. Now, however, we |
| 10657 | sign-extend the 32-bit result to 64-bits, and store it as a |
| 10658 | 64-bit value. We are especially generous here in that we |
| 10659 | go to extreme lengths to support this usage on systems with |
| 10660 | only a 32-bit VMA. */ |
| 10661 | { |
| 10662 | bfd_vma sign_bits; |
| 10663 | bfd_vma low_bits; |
| 10664 | bfd_vma high_bits; |
| 10665 | |
| 10666 | if (value & ((bfd_vma) 1 << 31)) |
| 10667 | #ifdef BFD64 |
| 10668 | sign_bits = ((bfd_vma) 1 << 32) - 1; |
| 10669 | #else |
| 10670 | sign_bits = -1; |
| 10671 | #endif |
| 10672 | else |
| 10673 | sign_bits = 0; |
| 10674 | |
| 10675 | /* If we don't know that we have a 64-bit type, |
| 10676 | do two separate stores. */ |
| 10677 | if (bfd_big_endian (input_bfd)) |
| 10678 | { |
| 10679 | /* Undo what we did above. */ |
| 10680 | rel->r_offset -= 4; |
| 10681 | /* Store the sign-bits (which are most significant) |
| 10682 | first. */ |
| 10683 | low_bits = sign_bits; |
| 10684 | high_bits = value; |
| 10685 | } |
| 10686 | else |
| 10687 | { |
| 10688 | low_bits = value; |
| 10689 | high_bits = sign_bits; |
| 10690 | } |
| 10691 | bfd_put_32 (input_bfd, low_bits, |
| 10692 | contents + rel->r_offset); |
| 10693 | bfd_put_32 (input_bfd, high_bits, |
| 10694 | contents + rel->r_offset + 4); |
| 10695 | continue; |
| 10696 | } |
| 10697 | |
| 10698 | /* Actually perform the relocation. */ |
| 10699 | if (! mips_elf_perform_relocation (info, howto, rel, value, |
| 10700 | input_bfd, input_section, |
| 10701 | contents, cross_mode_jump_p)) |
| 10702 | return FALSE; |
| 10703 | } |
| 10704 | |
| 10705 | return TRUE; |
| 10706 | } |
| 10707 | \f |
| 10708 | /* A function that iterates over each entry in la25_stubs and fills |
| 10709 | in the code for each one. DATA points to a mips_htab_traverse_info. */ |
| 10710 | |
| 10711 | static int |
| 10712 | mips_elf_create_la25_stub (void **slot, void *data) |
| 10713 | { |
| 10714 | struct mips_htab_traverse_info *hti; |
| 10715 | struct mips_elf_link_hash_table *htab; |
| 10716 | struct mips_elf_la25_stub *stub; |
| 10717 | asection *s; |
| 10718 | bfd_byte *loc; |
| 10719 | bfd_vma offset, target, target_high, target_low; |
| 10720 | bfd_vma branch_pc; |
| 10721 | bfd_signed_vma pcrel_offset = 0; |
| 10722 | |
| 10723 | stub = (struct mips_elf_la25_stub *) *slot; |
| 10724 | hti = (struct mips_htab_traverse_info *) data; |
| 10725 | htab = mips_elf_hash_table (hti->info); |
| 10726 | BFD_ASSERT (htab != NULL); |
| 10727 | |
| 10728 | /* Create the section contents, if we haven't already. */ |
| 10729 | s = stub->stub_section; |
| 10730 | loc = s->contents; |
| 10731 | if (loc == NULL) |
| 10732 | { |
| 10733 | loc = bfd_malloc (s->size); |
| 10734 | if (loc == NULL) |
| 10735 | { |
| 10736 | hti->error = TRUE; |
| 10737 | return FALSE; |
| 10738 | } |
| 10739 | s->contents = loc; |
| 10740 | } |
| 10741 | |
| 10742 | /* Work out where in the section this stub should go. */ |
| 10743 | offset = stub->offset; |
| 10744 | |
| 10745 | /* We add 8 here to account for the LUI/ADDIU instructions |
| 10746 | before the branch instruction. This cannot be moved down to |
| 10747 | where pcrel_offset is calculated as 's' is updated in |
| 10748 | mips_elf_get_la25_target. */ |
| 10749 | branch_pc = s->output_section->vma + s->output_offset + offset + 8; |
| 10750 | |
| 10751 | /* Work out the target address. */ |
| 10752 | target = mips_elf_get_la25_target (stub, &s); |
| 10753 | target += s->output_section->vma + s->output_offset; |
| 10754 | |
| 10755 | target_high = ((target + 0x8000) >> 16) & 0xffff; |
| 10756 | target_low = (target & 0xffff); |
| 10757 | |
| 10758 | /* Calculate the PC of the compact branch instruction (for the case where |
| 10759 | compact branches are used for either microMIPSR6 or MIPSR6 with |
| 10760 | compact branches. Add 4-bytes to account for BC using the PC of the |
| 10761 | next instruction as the base. */ |
| 10762 | pcrel_offset = target - (branch_pc + 4); |
| 10763 | |
| 10764 | if (stub->stub_section != htab->strampoline) |
| 10765 | { |
| 10766 | /* This is a simple LUI/ADDIU stub. Zero out the beginning |
| 10767 | of the section and write the two instructions at the end. */ |
| 10768 | memset (loc, 0, offset); |
| 10769 | loc += offset; |
| 10770 | if (ELF_ST_IS_MICROMIPS (stub->h->root.other)) |
| 10771 | { |
| 10772 | bfd_put_micromips_32 (hti->output_bfd, |
| 10773 | LA25_LUI_MICROMIPS (target_high), |
| 10774 | loc); |
| 10775 | bfd_put_micromips_32 (hti->output_bfd, |
| 10776 | LA25_ADDIU_MICROMIPS (target_low), |
| 10777 | loc + 4); |
| 10778 | } |
| 10779 | else |
| 10780 | { |
| 10781 | bfd_put_32 (hti->output_bfd, LA25_LUI (target_high), loc); |
| 10782 | bfd_put_32 (hti->output_bfd, LA25_ADDIU (target_low), loc + 4); |
| 10783 | } |
| 10784 | } |
| 10785 | else |
| 10786 | { |
| 10787 | /* This is trampoline. */ |
| 10788 | loc += offset; |
| 10789 | if (ELF_ST_IS_MICROMIPS (stub->h->root.other)) |
| 10790 | { |
| 10791 | bfd_put_micromips_32 (hti->output_bfd, |
| 10792 | LA25_LUI_MICROMIPS (target_high), loc); |
| 10793 | bfd_put_micromips_32 (hti->output_bfd, |
| 10794 | LA25_J_MICROMIPS (target), loc + 4); |
| 10795 | bfd_put_micromips_32 (hti->output_bfd, |
| 10796 | LA25_ADDIU_MICROMIPS (target_low), loc + 8); |
| 10797 | bfd_put_32 (hti->output_bfd, 0, loc + 12); |
| 10798 | } |
| 10799 | else |
| 10800 | { |
| 10801 | bfd_put_32 (hti->output_bfd, LA25_LUI (target_high), loc); |
| 10802 | if (MIPSR6_P (hti->output_bfd) && htab->compact_branches) |
| 10803 | { |
| 10804 | bfd_put_32 (hti->output_bfd, LA25_ADDIU (target_low), loc + 4); |
| 10805 | bfd_put_32 (hti->output_bfd, LA25_BC (pcrel_offset), loc + 8); |
| 10806 | } |
| 10807 | else |
| 10808 | { |
| 10809 | bfd_put_32 (hti->output_bfd, LA25_J (target), loc + 4); |
| 10810 | bfd_put_32 (hti->output_bfd, LA25_ADDIU (target_low), loc + 8); |
| 10811 | } |
| 10812 | bfd_put_32 (hti->output_bfd, 0, loc + 12); |
| 10813 | } |
| 10814 | } |
| 10815 | return TRUE; |
| 10816 | } |
| 10817 | |
| 10818 | /* If NAME is one of the special IRIX6 symbols defined by the linker, |
| 10819 | adjust it appropriately now. */ |
| 10820 | |
| 10821 | static void |
| 10822 | mips_elf_irix6_finish_dynamic_symbol (bfd *abfd ATTRIBUTE_UNUSED, |
| 10823 | const char *name, Elf_Internal_Sym *sym) |
| 10824 | { |
| 10825 | /* The linker script takes care of providing names and values for |
| 10826 | these, but we must place them into the right sections. */ |
| 10827 | static const char* const text_section_symbols[] = { |
| 10828 | "_ftext", |
| 10829 | "_etext", |
| 10830 | "__dso_displacement", |
| 10831 | "__elf_header", |
| 10832 | "__program_header_table", |
| 10833 | NULL |
| 10834 | }; |
| 10835 | |
| 10836 | static const char* const data_section_symbols[] = { |
| 10837 | "_fdata", |
| 10838 | "_edata", |
| 10839 | "_end", |
| 10840 | "_fbss", |
| 10841 | NULL |
| 10842 | }; |
| 10843 | |
| 10844 | const char* const *p; |
| 10845 | int i; |
| 10846 | |
| 10847 | for (i = 0; i < 2; ++i) |
| 10848 | for (p = (i == 0) ? text_section_symbols : data_section_symbols; |
| 10849 | *p; |
| 10850 | ++p) |
| 10851 | if (strcmp (*p, name) == 0) |
| 10852 | { |
| 10853 | /* All of these symbols are given type STT_SECTION by the |
| 10854 | IRIX6 linker. */ |
| 10855 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 10856 | sym->st_other = STO_PROTECTED; |
| 10857 | |
| 10858 | /* The IRIX linker puts these symbols in special sections. */ |
| 10859 | if (i == 0) |
| 10860 | sym->st_shndx = SHN_MIPS_TEXT; |
| 10861 | else |
| 10862 | sym->st_shndx = SHN_MIPS_DATA; |
| 10863 | |
| 10864 | break; |
| 10865 | } |
| 10866 | } |
| 10867 | |
| 10868 | /* Finish up dynamic symbol handling. We set the contents of various |
| 10869 | dynamic sections here. */ |
| 10870 | |
| 10871 | bfd_boolean |
| 10872 | _bfd_mips_elf_finish_dynamic_symbol (bfd *output_bfd, |
| 10873 | struct bfd_link_info *info, |
| 10874 | struct elf_link_hash_entry *h, |
| 10875 | Elf_Internal_Sym *sym) |
| 10876 | { |
| 10877 | bfd *dynobj; |
| 10878 | asection *sgot; |
| 10879 | struct mips_got_info *g, *gg; |
| 10880 | const char *name; |
| 10881 | int idx; |
| 10882 | struct mips_elf_link_hash_table *htab; |
| 10883 | struct mips_elf_link_hash_entry *hmips; |
| 10884 | |
| 10885 | htab = mips_elf_hash_table (info); |
| 10886 | BFD_ASSERT (htab != NULL); |
| 10887 | dynobj = elf_hash_table (info)->dynobj; |
| 10888 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 10889 | |
| 10890 | BFD_ASSERT (!htab->is_vxworks); |
| 10891 | |
| 10892 | if (h->plt.plist != NULL |
| 10893 | && (h->plt.plist->mips_offset != MINUS_ONE |
| 10894 | || h->plt.plist->comp_offset != MINUS_ONE)) |
| 10895 | { |
| 10896 | /* We've decided to create a PLT entry for this symbol. */ |
| 10897 | bfd_byte *loc; |
| 10898 | bfd_vma header_address, got_address; |
| 10899 | bfd_vma got_address_high, got_address_low, load; |
| 10900 | bfd_vma got_index; |
| 10901 | bfd_vma isa_bit; |
| 10902 | |
| 10903 | got_index = h->plt.plist->gotplt_index; |
| 10904 | |
| 10905 | BFD_ASSERT (htab->use_plts_and_copy_relocs); |
| 10906 | BFD_ASSERT (h->dynindx != -1); |
| 10907 | BFD_ASSERT (htab->root.splt != NULL); |
| 10908 | BFD_ASSERT (got_index != MINUS_ONE); |
| 10909 | BFD_ASSERT (!h->def_regular); |
| 10910 | |
| 10911 | /* Calculate the address of the PLT header. */ |
| 10912 | isa_bit = htab->plt_header_is_comp; |
| 10913 | header_address = (htab->root.splt->output_section->vma |
| 10914 | + htab->root.splt->output_offset + isa_bit); |
| 10915 | |
| 10916 | /* Calculate the address of the .got.plt entry. */ |
| 10917 | got_address = (htab->root.sgotplt->output_section->vma |
| 10918 | + htab->root.sgotplt->output_offset |
| 10919 | + got_index * MIPS_ELF_GOT_SIZE (dynobj)); |
| 10920 | |
| 10921 | got_address_high = ((got_address + 0x8000) >> 16) & 0xffff; |
| 10922 | got_address_low = got_address & 0xffff; |
| 10923 | |
| 10924 | /* The PLT sequence is not safe for N64 if .got.plt entry's address |
| 10925 | cannot be loaded in two instructions. */ |
| 10926 | if (ABI_64_P (output_bfd) |
| 10927 | && ((got_address + 0x80008000) & ~(bfd_vma) 0xffffffff) != 0) |
| 10928 | { |
| 10929 | _bfd_error_handler |
| 10930 | /* xgettext:c-format */ |
| 10931 | (_("%pB: `%pA' entry VMA of %#" PRIx64 " outside the 32-bit range " |
| 10932 | "supported; consider using `-Ttext-segment=...'"), |
| 10933 | output_bfd, |
| 10934 | htab->root.sgotplt->output_section, |
| 10935 | (int64_t) got_address); |
| 10936 | bfd_set_error (bfd_error_no_error); |
| 10937 | return FALSE; |
| 10938 | } |
| 10939 | |
| 10940 | /* Initially point the .got.plt entry at the PLT header. */ |
| 10941 | loc = (htab->root.sgotplt->contents |
| 10942 | + got_index * MIPS_ELF_GOT_SIZE (dynobj)); |
| 10943 | if (ABI_64_P (output_bfd)) |
| 10944 | bfd_put_64 (output_bfd, header_address, loc); |
| 10945 | else |
| 10946 | bfd_put_32 (output_bfd, header_address, loc); |
| 10947 | |
| 10948 | /* Now handle the PLT itself. First the standard entry (the order |
| 10949 | does not matter, we just have to pick one). */ |
| 10950 | if (h->plt.plist->mips_offset != MINUS_ONE) |
| 10951 | { |
| 10952 | const bfd_vma *plt_entry; |
| 10953 | bfd_vma plt_offset; |
| 10954 | |
| 10955 | plt_offset = htab->plt_header_size + h->plt.plist->mips_offset; |
| 10956 | |
| 10957 | BFD_ASSERT (plt_offset <= htab->root.splt->size); |
| 10958 | |
| 10959 | /* Find out where the .plt entry should go. */ |
| 10960 | loc = htab->root.splt->contents + plt_offset; |
| 10961 | |
| 10962 | /* Pick the load opcode. */ |
| 10963 | load = MIPS_ELF_LOAD_WORD (output_bfd); |
| 10964 | |
| 10965 | /* Fill in the PLT entry itself. */ |
| 10966 | |
| 10967 | if (MIPSR6_P (output_bfd)) |
| 10968 | plt_entry = htab->compact_branches ? mipsr6_exec_plt_entry_compact |
| 10969 | : mipsr6_exec_plt_entry; |
| 10970 | else |
| 10971 | plt_entry = mips_exec_plt_entry; |
| 10972 | bfd_put_32 (output_bfd, plt_entry[0] | got_address_high, loc); |
| 10973 | bfd_put_32 (output_bfd, plt_entry[1] | got_address_low | load, |
| 10974 | loc + 4); |
| 10975 | |
| 10976 | if (! LOAD_INTERLOCKS_P (output_bfd) |
| 10977 | || (MIPSR6_P (output_bfd) && htab->compact_branches)) |
| 10978 | { |
| 10979 | bfd_put_32 (output_bfd, plt_entry[2] | got_address_low, loc + 8); |
| 10980 | bfd_put_32 (output_bfd, plt_entry[3], loc + 12); |
| 10981 | } |
| 10982 | else |
| 10983 | { |
| 10984 | bfd_put_32 (output_bfd, plt_entry[3], loc + 8); |
| 10985 | bfd_put_32 (output_bfd, plt_entry[2] | got_address_low, |
| 10986 | loc + 12); |
| 10987 | } |
| 10988 | } |
| 10989 | |
| 10990 | /* Now the compressed entry. They come after any standard ones. */ |
| 10991 | if (h->plt.plist->comp_offset != MINUS_ONE) |
| 10992 | { |
| 10993 | bfd_vma plt_offset; |
| 10994 | |
| 10995 | plt_offset = (htab->plt_header_size + htab->plt_mips_offset |
| 10996 | + h->plt.plist->comp_offset); |
| 10997 | |
| 10998 | BFD_ASSERT (plt_offset <= htab->root.splt->size); |
| 10999 | |
| 11000 | /* Find out where the .plt entry should go. */ |
| 11001 | loc = htab->root.splt->contents + plt_offset; |
| 11002 | |
| 11003 | /* Fill in the PLT entry itself. */ |
| 11004 | if (!MICROMIPS_P (output_bfd)) |
| 11005 | { |
| 11006 | const bfd_vma *plt_entry = mips16_o32_exec_plt_entry; |
| 11007 | |
| 11008 | bfd_put_16 (output_bfd, plt_entry[0], loc); |
| 11009 | bfd_put_16 (output_bfd, plt_entry[1], loc + 2); |
| 11010 | bfd_put_16 (output_bfd, plt_entry[2], loc + 4); |
| 11011 | bfd_put_16 (output_bfd, plt_entry[3], loc + 6); |
| 11012 | bfd_put_16 (output_bfd, plt_entry[4], loc + 8); |
| 11013 | bfd_put_16 (output_bfd, plt_entry[5], loc + 10); |
| 11014 | bfd_put_32 (output_bfd, got_address, loc + 12); |
| 11015 | } |
| 11016 | else if (htab->insn32) |
| 11017 | { |
| 11018 | const bfd_vma *plt_entry = micromips_insn32_o32_exec_plt_entry; |
| 11019 | |
| 11020 | bfd_put_16 (output_bfd, plt_entry[0], loc); |
| 11021 | bfd_put_16 (output_bfd, got_address_high, loc + 2); |
| 11022 | bfd_put_16 (output_bfd, plt_entry[2], loc + 4); |
| 11023 | bfd_put_16 (output_bfd, got_address_low, loc + 6); |
| 11024 | bfd_put_16 (output_bfd, plt_entry[4], loc + 8); |
| 11025 | bfd_put_16 (output_bfd, plt_entry[5], loc + 10); |
| 11026 | bfd_put_16 (output_bfd, plt_entry[6], loc + 12); |
| 11027 | bfd_put_16 (output_bfd, got_address_low, loc + 14); |
| 11028 | } |
| 11029 | else |
| 11030 | { |
| 11031 | const bfd_vma *plt_entry = micromips_o32_exec_plt_entry; |
| 11032 | bfd_signed_vma gotpc_offset; |
| 11033 | bfd_vma loc_address; |
| 11034 | |
| 11035 | BFD_ASSERT (got_address % 4 == 0); |
| 11036 | |
| 11037 | loc_address = (htab->root.splt->output_section->vma |
| 11038 | + htab->root.splt->output_offset + plt_offset); |
| 11039 | gotpc_offset = got_address - ((loc_address | 3) ^ 3); |
| 11040 | |
| 11041 | /* ADDIUPC has a span of +/-16MB, check we're in range. */ |
| 11042 | if (gotpc_offset + 0x1000000 >= 0x2000000) |
| 11043 | { |
| 11044 | _bfd_error_handler |
| 11045 | /* xgettext:c-format */ |
| 11046 | (_("%pB: `%pA' offset of %" PRId64 " from `%pA' " |
| 11047 | "beyond the range of ADDIUPC"), |
| 11048 | output_bfd, |
| 11049 | htab->root.sgotplt->output_section, |
| 11050 | (int64_t) gotpc_offset, |
| 11051 | htab->root.splt->output_section); |
| 11052 | bfd_set_error (bfd_error_no_error); |
| 11053 | return FALSE; |
| 11054 | } |
| 11055 | bfd_put_16 (output_bfd, |
| 11056 | plt_entry[0] | ((gotpc_offset >> 18) & 0x7f), loc); |
| 11057 | bfd_put_16 (output_bfd, (gotpc_offset >> 2) & 0xffff, loc + 2); |
| 11058 | bfd_put_16 (output_bfd, plt_entry[2], loc + 4); |
| 11059 | bfd_put_16 (output_bfd, plt_entry[3], loc + 6); |
| 11060 | bfd_put_16 (output_bfd, plt_entry[4], loc + 8); |
| 11061 | bfd_put_16 (output_bfd, plt_entry[5], loc + 10); |
| 11062 | } |
| 11063 | } |
| 11064 | |
| 11065 | /* Emit an R_MIPS_JUMP_SLOT relocation against the .got.plt entry. */ |
| 11066 | mips_elf_output_dynamic_relocation (output_bfd, htab->root.srelplt, |
| 11067 | got_index - 2, h->dynindx, |
| 11068 | R_MIPS_JUMP_SLOT, got_address); |
| 11069 | |
| 11070 | /* We distinguish between PLT entries and lazy-binding stubs by |
| 11071 | giving the former an st_other value of STO_MIPS_PLT. Set the |
| 11072 | flag and leave the value if there are any relocations in the |
| 11073 | binary where pointer equality matters. */ |
| 11074 | sym->st_shndx = SHN_UNDEF; |
| 11075 | if (h->pointer_equality_needed) |
| 11076 | sym->st_other = ELF_ST_SET_MIPS_PLT (sym->st_other); |
| 11077 | else |
| 11078 | { |
| 11079 | sym->st_value = 0; |
| 11080 | sym->st_other = 0; |
| 11081 | } |
| 11082 | } |
| 11083 | |
| 11084 | if (h->plt.plist != NULL && h->plt.plist->stub_offset != MINUS_ONE) |
| 11085 | { |
| 11086 | /* We've decided to create a lazy-binding stub. */ |
| 11087 | bfd_boolean micromips_p = MICROMIPS_P (output_bfd); |
| 11088 | unsigned int other = micromips_p ? STO_MICROMIPS : 0; |
| 11089 | bfd_vma stub_size = htab->function_stub_size; |
| 11090 | bfd_byte stub[MIPS_FUNCTION_STUB_BIG_SIZE]; |
| 11091 | bfd_vma isa_bit = micromips_p; |
| 11092 | bfd_vma stub_big_size; |
| 11093 | |
| 11094 | if (!micromips_p) |
| 11095 | stub_big_size = MIPS_FUNCTION_STUB_BIG_SIZE; |
| 11096 | else if (htab->insn32) |
| 11097 | stub_big_size = MICROMIPS_INSN32_FUNCTION_STUB_BIG_SIZE; |
| 11098 | else |
| 11099 | stub_big_size = MICROMIPS_FUNCTION_STUB_BIG_SIZE; |
| 11100 | |
| 11101 | /* This symbol has a stub. Set it up. */ |
| 11102 | |
| 11103 | BFD_ASSERT (h->dynindx != -1); |
| 11104 | |
| 11105 | BFD_ASSERT (stub_size == stub_big_size || h->dynindx <= 0xffff); |
| 11106 | |
| 11107 | /* Values up to 2^31 - 1 are allowed. Larger values would cause |
| 11108 | sign extension at runtime in the stub, resulting in a negative |
| 11109 | index value. */ |
| 11110 | if (h->dynindx & ~0x7fffffff) |
| 11111 | return FALSE; |
| 11112 | |
| 11113 | /* Fill the stub. */ |
| 11114 | if (micromips_p) |
| 11115 | { |
| 11116 | idx = 0; |
| 11117 | bfd_put_micromips_32 (output_bfd, STUB_LW_MICROMIPS (output_bfd), |
| 11118 | stub + idx); |
| 11119 | idx += 4; |
| 11120 | if (htab->insn32) |
| 11121 | { |
| 11122 | bfd_put_micromips_32 (output_bfd, |
| 11123 | STUB_MOVE32_MICROMIPS, stub + idx); |
| 11124 | idx += 4; |
| 11125 | } |
| 11126 | else |
| 11127 | { |
| 11128 | bfd_put_16 (output_bfd, STUB_MOVE_MICROMIPS, stub + idx); |
| 11129 | idx += 2; |
| 11130 | } |
| 11131 | if (stub_size == stub_big_size) |
| 11132 | { |
| 11133 | long dynindx_hi = (h->dynindx >> 16) & 0x7fff; |
| 11134 | |
| 11135 | bfd_put_micromips_32 (output_bfd, |
| 11136 | STUB_LUI_MICROMIPS (dynindx_hi), |
| 11137 | stub + idx); |
| 11138 | idx += 4; |
| 11139 | } |
| 11140 | if (htab->insn32) |
| 11141 | { |
| 11142 | bfd_put_micromips_32 (output_bfd, STUB_JALR32_MICROMIPS, |
| 11143 | stub + idx); |
| 11144 | idx += 4; |
| 11145 | } |
| 11146 | else |
| 11147 | { |
| 11148 | bfd_put_16 (output_bfd, STUB_JALR_MICROMIPS, stub + idx); |
| 11149 | idx += 2; |
| 11150 | } |
| 11151 | |
| 11152 | /* If a large stub is not required and sign extension is not a |
| 11153 | problem, then use legacy code in the stub. */ |
| 11154 | if (stub_size == stub_big_size) |
| 11155 | bfd_put_micromips_32 (output_bfd, |
| 11156 | STUB_ORI_MICROMIPS (h->dynindx & 0xffff), |
| 11157 | stub + idx); |
| 11158 | else if (h->dynindx & ~0x7fff) |
| 11159 | bfd_put_micromips_32 (output_bfd, |
| 11160 | STUB_LI16U_MICROMIPS (h->dynindx & 0xffff), |
| 11161 | stub + idx); |
| 11162 | else |
| 11163 | bfd_put_micromips_32 (output_bfd, |
| 11164 | STUB_LI16S_MICROMIPS (output_bfd, |
| 11165 | h->dynindx), |
| 11166 | stub + idx); |
| 11167 | } |
| 11168 | else |
| 11169 | { |
| 11170 | idx = 0; |
| 11171 | bfd_put_32 (output_bfd, STUB_LW (output_bfd), stub + idx); |
| 11172 | idx += 4; |
| 11173 | bfd_put_32 (output_bfd, STUB_MOVE, stub + idx); |
| 11174 | idx += 4; |
| 11175 | if (stub_size == stub_big_size) |
| 11176 | { |
| 11177 | bfd_put_32 (output_bfd, STUB_LUI ((h->dynindx >> 16) & 0x7fff), |
| 11178 | stub + idx); |
| 11179 | idx += 4; |
| 11180 | } |
| 11181 | |
| 11182 | if (!(MIPSR6_P (output_bfd) && htab->compact_branches)) |
| 11183 | { |
| 11184 | bfd_put_32 (output_bfd, STUB_JALR, stub + idx); |
| 11185 | idx += 4; |
| 11186 | } |
| 11187 | |
| 11188 | /* If a large stub is not required and sign extension is not a |
| 11189 | problem, then use legacy code in the stub. */ |
| 11190 | if (stub_size == stub_big_size) |
| 11191 | bfd_put_32 (output_bfd, STUB_ORI (h->dynindx & 0xffff), |
| 11192 | stub + idx); |
| 11193 | else if (h->dynindx & ~0x7fff) |
| 11194 | bfd_put_32 (output_bfd, STUB_LI16U (h->dynindx & 0xffff), |
| 11195 | stub + idx); |
| 11196 | else |
| 11197 | bfd_put_32 (output_bfd, STUB_LI16S (output_bfd, h->dynindx), |
| 11198 | stub + idx); |
| 11199 | idx += 4; |
| 11200 | |
| 11201 | if (MIPSR6_P (output_bfd) && htab->compact_branches) |
| 11202 | bfd_put_32 (output_bfd, STUB_JALRC, stub + idx); |
| 11203 | } |
| 11204 | |
| 11205 | BFD_ASSERT (h->plt.plist->stub_offset <= htab->sstubs->size); |
| 11206 | memcpy (htab->sstubs->contents + h->plt.plist->stub_offset, |
| 11207 | stub, stub_size); |
| 11208 | |
| 11209 | /* Mark the symbol as undefined. stub_offset != -1 occurs |
| 11210 | only for the referenced symbol. */ |
| 11211 | sym->st_shndx = SHN_UNDEF; |
| 11212 | |
| 11213 | /* The run-time linker uses the st_value field of the symbol |
| 11214 | to reset the global offset table entry for this external |
| 11215 | to its stub address when unlinking a shared object. */ |
| 11216 | sym->st_value = (htab->sstubs->output_section->vma |
| 11217 | + htab->sstubs->output_offset |
| 11218 | + h->plt.plist->stub_offset |
| 11219 | + isa_bit); |
| 11220 | sym->st_other = other; |
| 11221 | } |
| 11222 | |
| 11223 | /* If we have a MIPS16 function with a stub, the dynamic symbol must |
| 11224 | refer to the stub, since only the stub uses the standard calling |
| 11225 | conventions. */ |
| 11226 | if (h->dynindx != -1 && hmips->fn_stub != NULL) |
| 11227 | { |
| 11228 | BFD_ASSERT (hmips->need_fn_stub); |
| 11229 | sym->st_value = (hmips->fn_stub->output_section->vma |
| 11230 | + hmips->fn_stub->output_offset); |
| 11231 | sym->st_size = hmips->fn_stub->size; |
| 11232 | sym->st_other = ELF_ST_VISIBILITY (sym->st_other); |
| 11233 | } |
| 11234 | |
| 11235 | BFD_ASSERT (h->dynindx != -1 |
| 11236 | || h->forced_local); |
| 11237 | |
| 11238 | sgot = htab->root.sgot; |
| 11239 | g = htab->got_info; |
| 11240 | BFD_ASSERT (g != NULL); |
| 11241 | |
| 11242 | /* Run through the global symbol table, creating GOT entries for all |
| 11243 | the symbols that need them. */ |
| 11244 | if (hmips->global_got_area != GGA_NONE) |
| 11245 | { |
| 11246 | bfd_vma offset; |
| 11247 | bfd_vma value; |
| 11248 | |
| 11249 | value = sym->st_value; |
| 11250 | offset = mips_elf_primary_global_got_index (output_bfd, info, h); |
| 11251 | MIPS_ELF_PUT_WORD (output_bfd, value, sgot->contents + offset); |
| 11252 | } |
| 11253 | |
| 11254 | if (hmips->global_got_area != GGA_NONE && g->next) |
| 11255 | { |
| 11256 | struct mips_got_entry e, *p; |
| 11257 | bfd_vma entry; |
| 11258 | bfd_vma offset; |
| 11259 | |
| 11260 | gg = g; |
| 11261 | |
| 11262 | e.abfd = output_bfd; |
| 11263 | e.symndx = -1; |
| 11264 | e.d.h = hmips; |
| 11265 | e.tls_type = GOT_TLS_NONE; |
| 11266 | |
| 11267 | for (g = g->next; g->next != gg; g = g->next) |
| 11268 | { |
| 11269 | if (g->got_entries |
| 11270 | && (p = (struct mips_got_entry *) htab_find (g->got_entries, |
| 11271 | &e))) |
| 11272 | { |
| 11273 | offset = p->gotidx; |
| 11274 | BFD_ASSERT (offset > 0 && offset < htab->root.sgot->size); |
| 11275 | if (bfd_link_pic (info) |
| 11276 | || (elf_hash_table (info)->dynamic_sections_created |
| 11277 | && p->d.h != NULL |
| 11278 | && p->d.h->root.def_dynamic |
| 11279 | && !p->d.h->root.def_regular)) |
| 11280 | { |
| 11281 | /* Create an R_MIPS_REL32 relocation for this entry. Due to |
| 11282 | the various compatibility problems, it's easier to mock |
| 11283 | up an R_MIPS_32 or R_MIPS_64 relocation and leave |
| 11284 | mips_elf_create_dynamic_relocation to calculate the |
| 11285 | appropriate addend. */ |
| 11286 | Elf_Internal_Rela rel[3]; |
| 11287 | |
| 11288 | memset (rel, 0, sizeof (rel)); |
| 11289 | if (ABI_64_P (output_bfd)) |
| 11290 | rel[0].r_info = ELF_R_INFO (output_bfd, 0, R_MIPS_64); |
| 11291 | else |
| 11292 | rel[0].r_info = ELF_R_INFO (output_bfd, 0, R_MIPS_32); |
| 11293 | rel[0].r_offset = rel[1].r_offset = rel[2].r_offset = offset; |
| 11294 | |
| 11295 | entry = 0; |
| 11296 | if (! (mips_elf_create_dynamic_relocation |
| 11297 | (output_bfd, info, rel, |
| 11298 | e.d.h, NULL, sym->st_value, &entry, sgot))) |
| 11299 | return FALSE; |
| 11300 | } |
| 11301 | else |
| 11302 | entry = sym->st_value; |
| 11303 | MIPS_ELF_PUT_WORD (output_bfd, entry, sgot->contents + offset); |
| 11304 | } |
| 11305 | } |
| 11306 | } |
| 11307 | |
| 11308 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 11309 | name = h->root.root.string; |
| 11310 | if (h == elf_hash_table (info)->hdynamic |
| 11311 | || h == elf_hash_table (info)->hgot) |
| 11312 | sym->st_shndx = SHN_ABS; |
| 11313 | else if (strcmp (name, "_DYNAMIC_LINK") == 0 |
| 11314 | || strcmp (name, "_DYNAMIC_LINKING") == 0) |
| 11315 | { |
| 11316 | sym->st_shndx = SHN_ABS; |
| 11317 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 11318 | sym->st_value = 1; |
| 11319 | } |
| 11320 | else if (SGI_COMPAT (output_bfd)) |
| 11321 | { |
| 11322 | if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0 |
| 11323 | || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0) |
| 11324 | { |
| 11325 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 11326 | sym->st_other = STO_PROTECTED; |
| 11327 | sym->st_value = 0; |
| 11328 | sym->st_shndx = SHN_MIPS_DATA; |
| 11329 | } |
| 11330 | else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0) |
| 11331 | { |
| 11332 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 11333 | sym->st_other = STO_PROTECTED; |
| 11334 | sym->st_value = mips_elf_hash_table (info)->procedure_count; |
| 11335 | sym->st_shndx = SHN_ABS; |
| 11336 | } |
| 11337 | else if (sym->st_shndx != SHN_UNDEF && sym->st_shndx != SHN_ABS) |
| 11338 | { |
| 11339 | if (h->type == STT_FUNC) |
| 11340 | sym->st_shndx = SHN_MIPS_TEXT; |
| 11341 | else if (h->type == STT_OBJECT) |
| 11342 | sym->st_shndx = SHN_MIPS_DATA; |
| 11343 | } |
| 11344 | } |
| 11345 | |
| 11346 | /* Emit a copy reloc, if needed. */ |
| 11347 | if (h->needs_copy) |
| 11348 | { |
| 11349 | asection *s; |
| 11350 | bfd_vma symval; |
| 11351 | |
| 11352 | BFD_ASSERT (h->dynindx != -1); |
| 11353 | BFD_ASSERT (htab->use_plts_and_copy_relocs); |
| 11354 | |
| 11355 | s = mips_elf_rel_dyn_section (info, FALSE); |
| 11356 | symval = (h->root.u.def.section->output_section->vma |
| 11357 | + h->root.u.def.section->output_offset |
| 11358 | + h->root.u.def.value); |
| 11359 | mips_elf_output_dynamic_relocation (output_bfd, s, s->reloc_count++, |
| 11360 | h->dynindx, R_MIPS_COPY, symval); |
| 11361 | } |
| 11362 | |
| 11363 | /* Handle the IRIX6-specific symbols. */ |
| 11364 | if (IRIX_COMPAT (output_bfd) == ict_irix6) |
| 11365 | mips_elf_irix6_finish_dynamic_symbol (output_bfd, name, sym); |
| 11366 | |
| 11367 | /* Keep dynamic compressed symbols odd. This allows the dynamic linker |
| 11368 | to treat compressed symbols like any other. */ |
| 11369 | if (ELF_ST_IS_MIPS16 (sym->st_other)) |
| 11370 | { |
| 11371 | BFD_ASSERT (sym->st_value & 1); |
| 11372 | sym->st_other -= STO_MIPS16; |
| 11373 | } |
| 11374 | else if (ELF_ST_IS_MICROMIPS (sym->st_other)) |
| 11375 | { |
| 11376 | BFD_ASSERT (sym->st_value & 1); |
| 11377 | sym->st_other -= STO_MICROMIPS; |
| 11378 | } |
| 11379 | |
| 11380 | return TRUE; |
| 11381 | } |
| 11382 | |
| 11383 | /* Likewise, for VxWorks. */ |
| 11384 | |
| 11385 | bfd_boolean |
| 11386 | _bfd_mips_vxworks_finish_dynamic_symbol (bfd *output_bfd, |
| 11387 | struct bfd_link_info *info, |
| 11388 | struct elf_link_hash_entry *h, |
| 11389 | Elf_Internal_Sym *sym) |
| 11390 | { |
| 11391 | bfd *dynobj; |
| 11392 | asection *sgot; |
| 11393 | struct mips_got_info *g; |
| 11394 | struct mips_elf_link_hash_table *htab; |
| 11395 | struct mips_elf_link_hash_entry *hmips; |
| 11396 | |
| 11397 | htab = mips_elf_hash_table (info); |
| 11398 | BFD_ASSERT (htab != NULL); |
| 11399 | dynobj = elf_hash_table (info)->dynobj; |
| 11400 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 11401 | |
| 11402 | if (h->plt.plist != NULL && h->plt.plist->mips_offset != MINUS_ONE) |
| 11403 | { |
| 11404 | bfd_byte *loc; |
| 11405 | bfd_vma plt_address, got_address, got_offset, branch_offset; |
| 11406 | Elf_Internal_Rela rel; |
| 11407 | static const bfd_vma *plt_entry; |
| 11408 | bfd_vma gotplt_index; |
| 11409 | bfd_vma plt_offset; |
| 11410 | |
| 11411 | plt_offset = htab->plt_header_size + h->plt.plist->mips_offset; |
| 11412 | gotplt_index = h->plt.plist->gotplt_index; |
| 11413 | |
| 11414 | BFD_ASSERT (h->dynindx != -1); |
| 11415 | BFD_ASSERT (htab->root.splt != NULL); |
| 11416 | BFD_ASSERT (gotplt_index != MINUS_ONE); |
| 11417 | BFD_ASSERT (plt_offset <= htab->root.splt->size); |
| 11418 | |
| 11419 | /* Calculate the address of the .plt entry. */ |
| 11420 | plt_address = (htab->root.splt->output_section->vma |
| 11421 | + htab->root.splt->output_offset |
| 11422 | + plt_offset); |
| 11423 | |
| 11424 | /* Calculate the address of the .got.plt entry. */ |
| 11425 | got_address = (htab->root.sgotplt->output_section->vma |
| 11426 | + htab->root.sgotplt->output_offset |
| 11427 | + gotplt_index * MIPS_ELF_GOT_SIZE (output_bfd)); |
| 11428 | |
| 11429 | /* Calculate the offset of the .got.plt entry from |
| 11430 | _GLOBAL_OFFSET_TABLE_. */ |
| 11431 | got_offset = mips_elf_gotplt_index (info, h); |
| 11432 | |
| 11433 | /* Calculate the offset for the branch at the start of the PLT |
| 11434 | entry. The branch jumps to the beginning of .plt. */ |
| 11435 | branch_offset = -(plt_offset / 4 + 1) & 0xffff; |
| 11436 | |
| 11437 | /* Fill in the initial value of the .got.plt entry. */ |
| 11438 | bfd_put_32 (output_bfd, plt_address, |
| 11439 | (htab->root.sgotplt->contents |
| 11440 | + gotplt_index * MIPS_ELF_GOT_SIZE (output_bfd))); |
| 11441 | |
| 11442 | /* Find out where the .plt entry should go. */ |
| 11443 | loc = htab->root.splt->contents + plt_offset; |
| 11444 | |
| 11445 | if (bfd_link_pic (info)) |
| 11446 | { |
| 11447 | plt_entry = mips_vxworks_shared_plt_entry; |
| 11448 | bfd_put_32 (output_bfd, plt_entry[0] | branch_offset, loc); |
| 11449 | bfd_put_32 (output_bfd, plt_entry[1] | gotplt_index, loc + 4); |
| 11450 | } |
| 11451 | else |
| 11452 | { |
| 11453 | bfd_vma got_address_high, got_address_low; |
| 11454 | |
| 11455 | plt_entry = mips_vxworks_exec_plt_entry; |
| 11456 | got_address_high = ((got_address + 0x8000) >> 16) & 0xffff; |
| 11457 | got_address_low = got_address & 0xffff; |
| 11458 | |
| 11459 | bfd_put_32 (output_bfd, plt_entry[0] | branch_offset, loc); |
| 11460 | bfd_put_32 (output_bfd, plt_entry[1] | gotplt_index, loc + 4); |
| 11461 | bfd_put_32 (output_bfd, plt_entry[2] | got_address_high, loc + 8); |
| 11462 | bfd_put_32 (output_bfd, plt_entry[3] | got_address_low, loc + 12); |
| 11463 | bfd_put_32 (output_bfd, plt_entry[4], loc + 16); |
| 11464 | bfd_put_32 (output_bfd, plt_entry[5], loc + 20); |
| 11465 | bfd_put_32 (output_bfd, plt_entry[6], loc + 24); |
| 11466 | bfd_put_32 (output_bfd, plt_entry[7], loc + 28); |
| 11467 | |
| 11468 | loc = (htab->srelplt2->contents |
| 11469 | + (gotplt_index * 3 + 2) * sizeof (Elf32_External_Rela)); |
| 11470 | |
| 11471 | /* Emit a relocation for the .got.plt entry. */ |
| 11472 | rel.r_offset = got_address; |
| 11473 | rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_MIPS_32); |
| 11474 | rel.r_addend = plt_offset; |
| 11475 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 11476 | |
| 11477 | /* Emit a relocation for the lui of %hi(<.got.plt slot>). */ |
| 11478 | loc += sizeof (Elf32_External_Rela); |
| 11479 | rel.r_offset = plt_address + 8; |
| 11480 | rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_HI16); |
| 11481 | rel.r_addend = got_offset; |
| 11482 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 11483 | |
| 11484 | /* Emit a relocation for the addiu of %lo(<.got.plt slot>). */ |
| 11485 | loc += sizeof (Elf32_External_Rela); |
| 11486 | rel.r_offset += 4; |
| 11487 | rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_LO16); |
| 11488 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 11489 | } |
| 11490 | |
| 11491 | /* Emit an R_MIPS_JUMP_SLOT relocation against the .got.plt entry. */ |
| 11492 | loc = (htab->root.srelplt->contents |
| 11493 | + gotplt_index * sizeof (Elf32_External_Rela)); |
| 11494 | rel.r_offset = got_address; |
| 11495 | rel.r_info = ELF32_R_INFO (h->dynindx, R_MIPS_JUMP_SLOT); |
| 11496 | rel.r_addend = 0; |
| 11497 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 11498 | |
| 11499 | if (!h->def_regular) |
| 11500 | sym->st_shndx = SHN_UNDEF; |
| 11501 | } |
| 11502 | |
| 11503 | BFD_ASSERT (h->dynindx != -1 || h->forced_local); |
| 11504 | |
| 11505 | sgot = htab->root.sgot; |
| 11506 | g = htab->got_info; |
| 11507 | BFD_ASSERT (g != NULL); |
| 11508 | |
| 11509 | /* See if this symbol has an entry in the GOT. */ |
| 11510 | if (hmips->global_got_area != GGA_NONE) |
| 11511 | { |
| 11512 | bfd_vma offset; |
| 11513 | Elf_Internal_Rela outrel; |
| 11514 | bfd_byte *loc; |
| 11515 | asection *s; |
| 11516 | |
| 11517 | /* Install the symbol value in the GOT. */ |
| 11518 | offset = mips_elf_primary_global_got_index (output_bfd, info, h); |
| 11519 | MIPS_ELF_PUT_WORD (output_bfd, sym->st_value, sgot->contents + offset); |
| 11520 | |
| 11521 | /* Add a dynamic relocation for it. */ |
| 11522 | s = mips_elf_rel_dyn_section (info, FALSE); |
| 11523 | loc = s->contents + (s->reloc_count++ * sizeof (Elf32_External_Rela)); |
| 11524 | outrel.r_offset = (sgot->output_section->vma |
| 11525 | + sgot->output_offset |
| 11526 | + offset); |
| 11527 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_MIPS_32); |
| 11528 | outrel.r_addend = 0; |
| 11529 | bfd_elf32_swap_reloca_out (dynobj, &outrel, loc); |
| 11530 | } |
| 11531 | |
| 11532 | /* Emit a copy reloc, if needed. */ |
| 11533 | if (h->needs_copy) |
| 11534 | { |
| 11535 | Elf_Internal_Rela rel; |
| 11536 | asection *srel; |
| 11537 | bfd_byte *loc; |
| 11538 | |
| 11539 | BFD_ASSERT (h->dynindx != -1); |
| 11540 | |
| 11541 | rel.r_offset = (h->root.u.def.section->output_section->vma |
| 11542 | + h->root.u.def.section->output_offset |
| 11543 | + h->root.u.def.value); |
| 11544 | rel.r_info = ELF32_R_INFO (h->dynindx, R_MIPS_COPY); |
| 11545 | rel.r_addend = 0; |
| 11546 | if (h->root.u.def.section == htab->root.sdynrelro) |
| 11547 | srel = htab->root.sreldynrelro; |
| 11548 | else |
| 11549 | srel = htab->root.srelbss; |
| 11550 | loc = srel->contents + srel->reloc_count * sizeof (Elf32_External_Rela); |
| 11551 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 11552 | ++srel->reloc_count; |
| 11553 | } |
| 11554 | |
| 11555 | /* If this is a mips16/microMIPS symbol, force the value to be even. */ |
| 11556 | if (ELF_ST_IS_COMPRESSED (sym->st_other)) |
| 11557 | sym->st_value &= ~1; |
| 11558 | |
| 11559 | return TRUE; |
| 11560 | } |
| 11561 | |
| 11562 | /* Write out a plt0 entry to the beginning of .plt. */ |
| 11563 | |
| 11564 | static bfd_boolean |
| 11565 | mips_finish_exec_plt (bfd *output_bfd, struct bfd_link_info *info) |
| 11566 | { |
| 11567 | bfd_byte *loc; |
| 11568 | bfd_vma gotplt_value, gotplt_value_high, gotplt_value_low; |
| 11569 | static const bfd_vma *plt_entry; |
| 11570 | struct mips_elf_link_hash_table *htab; |
| 11571 | |
| 11572 | htab = mips_elf_hash_table (info); |
| 11573 | BFD_ASSERT (htab != NULL); |
| 11574 | |
| 11575 | if (ABI_64_P (output_bfd)) |
| 11576 | plt_entry = (htab->compact_branches |
| 11577 | ? mipsr6_n64_exec_plt0_entry_compact |
| 11578 | : mips_n64_exec_plt0_entry); |
| 11579 | else if (ABI_N32_P (output_bfd)) |
| 11580 | plt_entry = (htab->compact_branches |
| 11581 | ? mipsr6_n32_exec_plt0_entry_compact |
| 11582 | : mips_n32_exec_plt0_entry); |
| 11583 | else if (!htab->plt_header_is_comp) |
| 11584 | plt_entry = (htab->compact_branches |
| 11585 | ? mipsr6_o32_exec_plt0_entry_compact |
| 11586 | : mips_o32_exec_plt0_entry); |
| 11587 | else if (htab->insn32) |
| 11588 | plt_entry = micromips_insn32_o32_exec_plt0_entry; |
| 11589 | else |
| 11590 | plt_entry = micromips_o32_exec_plt0_entry; |
| 11591 | |
| 11592 | /* Calculate the value of .got.plt. */ |
| 11593 | gotplt_value = (htab->root.sgotplt->output_section->vma |
| 11594 | + htab->root.sgotplt->output_offset); |
| 11595 | gotplt_value_high = ((gotplt_value + 0x8000) >> 16) & 0xffff; |
| 11596 | gotplt_value_low = gotplt_value & 0xffff; |
| 11597 | |
| 11598 | /* The PLT sequence is not safe for N64 if .got.plt's address can |
| 11599 | not be loaded in two instructions. */ |
| 11600 | if (ABI_64_P (output_bfd) |
| 11601 | && ((gotplt_value + 0x80008000) & ~(bfd_vma) 0xffffffff) != 0) |
| 11602 | { |
| 11603 | _bfd_error_handler |
| 11604 | /* xgettext:c-format */ |
| 11605 | (_("%pB: `%pA' start VMA of %#" PRIx64 " outside the 32-bit range " |
| 11606 | "supported; consider using `-Ttext-segment=...'"), |
| 11607 | output_bfd, |
| 11608 | htab->root.sgotplt->output_section, |
| 11609 | (int64_t) gotplt_value); |
| 11610 | bfd_set_error (bfd_error_no_error); |
| 11611 | return FALSE; |
| 11612 | } |
| 11613 | |
| 11614 | /* Install the PLT header. */ |
| 11615 | loc = htab->root.splt->contents; |
| 11616 | if (plt_entry == micromips_o32_exec_plt0_entry) |
| 11617 | { |
| 11618 | bfd_vma gotpc_offset; |
| 11619 | bfd_vma loc_address; |
| 11620 | size_t i; |
| 11621 | |
| 11622 | BFD_ASSERT (gotplt_value % 4 == 0); |
| 11623 | |
| 11624 | loc_address = (htab->root.splt->output_section->vma |
| 11625 | + htab->root.splt->output_offset); |
| 11626 | gotpc_offset = gotplt_value - ((loc_address | 3) ^ 3); |
| 11627 | |
| 11628 | /* ADDIUPC has a span of +/-16MB, check we're in range. */ |
| 11629 | if (gotpc_offset + 0x1000000 >= 0x2000000) |
| 11630 | { |
| 11631 | _bfd_error_handler |
| 11632 | /* xgettext:c-format */ |
| 11633 | (_("%pB: `%pA' offset of %" PRId64 " from `%pA' " |
| 11634 | "beyond the range of ADDIUPC"), |
| 11635 | output_bfd, |
| 11636 | htab->root.sgotplt->output_section, |
| 11637 | (int64_t) gotpc_offset, |
| 11638 | htab->root.splt->output_section); |
| 11639 | bfd_set_error (bfd_error_no_error); |
| 11640 | return FALSE; |
| 11641 | } |
| 11642 | bfd_put_16 (output_bfd, |
| 11643 | plt_entry[0] | ((gotpc_offset >> 18) & 0x7f), loc); |
| 11644 | bfd_put_16 (output_bfd, (gotpc_offset >> 2) & 0xffff, loc + 2); |
| 11645 | for (i = 2; i < ARRAY_SIZE (micromips_o32_exec_plt0_entry); i++) |
| 11646 | bfd_put_16 (output_bfd, plt_entry[i], loc + (i * 2)); |
| 11647 | } |
| 11648 | else if (plt_entry == micromips_insn32_o32_exec_plt0_entry) |
| 11649 | { |
| 11650 | size_t i; |
| 11651 | |
| 11652 | bfd_put_16 (output_bfd, plt_entry[0], loc); |
| 11653 | bfd_put_16 (output_bfd, gotplt_value_high, loc + 2); |
| 11654 | bfd_put_16 (output_bfd, plt_entry[2], loc + 4); |
| 11655 | bfd_put_16 (output_bfd, gotplt_value_low, loc + 6); |
| 11656 | bfd_put_16 (output_bfd, plt_entry[4], loc + 8); |
| 11657 | bfd_put_16 (output_bfd, gotplt_value_low, loc + 10); |
| 11658 | for (i = 6; i < ARRAY_SIZE (micromips_insn32_o32_exec_plt0_entry); i++) |
| 11659 | bfd_put_16 (output_bfd, plt_entry[i], loc + (i * 2)); |
| 11660 | } |
| 11661 | else |
| 11662 | { |
| 11663 | bfd_put_32 (output_bfd, plt_entry[0] | gotplt_value_high, loc); |
| 11664 | bfd_put_32 (output_bfd, plt_entry[1] | gotplt_value_low, loc + 4); |
| 11665 | bfd_put_32 (output_bfd, plt_entry[2] | gotplt_value_low, loc + 8); |
| 11666 | bfd_put_32 (output_bfd, plt_entry[3], loc + 12); |
| 11667 | bfd_put_32 (output_bfd, plt_entry[4], loc + 16); |
| 11668 | bfd_put_32 (output_bfd, plt_entry[5], loc + 20); |
| 11669 | bfd_put_32 (output_bfd, plt_entry[6], loc + 24); |
| 11670 | bfd_put_32 (output_bfd, plt_entry[7], loc + 28); |
| 11671 | } |
| 11672 | |
| 11673 | return TRUE; |
| 11674 | } |
| 11675 | |
| 11676 | /* Install the PLT header for a VxWorks executable and finalize the |
| 11677 | contents of .rela.plt.unloaded. */ |
| 11678 | |
| 11679 | static void |
| 11680 | mips_vxworks_finish_exec_plt (bfd *output_bfd, struct bfd_link_info *info) |
| 11681 | { |
| 11682 | Elf_Internal_Rela rela; |
| 11683 | bfd_byte *loc; |
| 11684 | bfd_vma got_value, got_value_high, got_value_low, plt_address; |
| 11685 | static const bfd_vma *plt_entry; |
| 11686 | struct mips_elf_link_hash_table *htab; |
| 11687 | |
| 11688 | htab = mips_elf_hash_table (info); |
| 11689 | BFD_ASSERT (htab != NULL); |
| 11690 | |
| 11691 | plt_entry = mips_vxworks_exec_plt0_entry; |
| 11692 | |
| 11693 | /* Calculate the value of _GLOBAL_OFFSET_TABLE_. */ |
| 11694 | got_value = (htab->root.hgot->root.u.def.section->output_section->vma |
| 11695 | + htab->root.hgot->root.u.def.section->output_offset |
| 11696 | + htab->root.hgot->root.u.def.value); |
| 11697 | |
| 11698 | got_value_high = ((got_value + 0x8000) >> 16) & 0xffff; |
| 11699 | got_value_low = got_value & 0xffff; |
| 11700 | |
| 11701 | /* Calculate the address of the PLT header. */ |
| 11702 | plt_address = (htab->root.splt->output_section->vma |
| 11703 | + htab->root.splt->output_offset); |
| 11704 | |
| 11705 | /* Install the PLT header. */ |
| 11706 | loc = htab->root.splt->contents; |
| 11707 | bfd_put_32 (output_bfd, plt_entry[0] | got_value_high, loc); |
| 11708 | bfd_put_32 (output_bfd, plt_entry[1] | got_value_low, loc + 4); |
| 11709 | bfd_put_32 (output_bfd, plt_entry[2], loc + 8); |
| 11710 | bfd_put_32 (output_bfd, plt_entry[3], loc + 12); |
| 11711 | bfd_put_32 (output_bfd, plt_entry[4], loc + 16); |
| 11712 | bfd_put_32 (output_bfd, plt_entry[5], loc + 20); |
| 11713 | |
| 11714 | /* Output the relocation for the lui of %hi(_GLOBAL_OFFSET_TABLE_). */ |
| 11715 | loc = htab->srelplt2->contents; |
| 11716 | rela.r_offset = plt_address; |
| 11717 | rela.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_HI16); |
| 11718 | rela.r_addend = 0; |
| 11719 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 11720 | loc += sizeof (Elf32_External_Rela); |
| 11721 | |
| 11722 | /* Output the relocation for the following addiu of |
| 11723 | %lo(_GLOBAL_OFFSET_TABLE_). */ |
| 11724 | rela.r_offset += 4; |
| 11725 | rela.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_LO16); |
| 11726 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 11727 | loc += sizeof (Elf32_External_Rela); |
| 11728 | |
| 11729 | /* Fix up the remaining relocations. They may have the wrong |
| 11730 | symbol index for _G_O_T_ or _P_L_T_ depending on the order |
| 11731 | in which symbols were output. */ |
| 11732 | while (loc < htab->srelplt2->contents + htab->srelplt2->size) |
| 11733 | { |
| 11734 | Elf_Internal_Rela rel; |
| 11735 | |
| 11736 | bfd_elf32_swap_reloca_in (output_bfd, loc, &rel); |
| 11737 | rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_MIPS_32); |
| 11738 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 11739 | loc += sizeof (Elf32_External_Rela); |
| 11740 | |
| 11741 | bfd_elf32_swap_reloca_in (output_bfd, loc, &rel); |
| 11742 | rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_HI16); |
| 11743 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 11744 | loc += sizeof (Elf32_External_Rela); |
| 11745 | |
| 11746 | bfd_elf32_swap_reloca_in (output_bfd, loc, &rel); |
| 11747 | rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_MIPS_LO16); |
| 11748 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 11749 | loc += sizeof (Elf32_External_Rela); |
| 11750 | } |
| 11751 | } |
| 11752 | |
| 11753 | /* Install the PLT header for a VxWorks shared library. */ |
| 11754 | |
| 11755 | static void |
| 11756 | mips_vxworks_finish_shared_plt (bfd *output_bfd, struct bfd_link_info *info) |
| 11757 | { |
| 11758 | unsigned int i; |
| 11759 | struct mips_elf_link_hash_table *htab; |
| 11760 | |
| 11761 | htab = mips_elf_hash_table (info); |
| 11762 | BFD_ASSERT (htab != NULL); |
| 11763 | |
| 11764 | /* We just need to copy the entry byte-by-byte. */ |
| 11765 | for (i = 0; i < ARRAY_SIZE (mips_vxworks_shared_plt0_entry); i++) |
| 11766 | bfd_put_32 (output_bfd, mips_vxworks_shared_plt0_entry[i], |
| 11767 | htab->root.splt->contents + i * 4); |
| 11768 | } |
| 11769 | |
| 11770 | /* Finish up the dynamic sections. */ |
| 11771 | |
| 11772 | bfd_boolean |
| 11773 | _bfd_mips_elf_finish_dynamic_sections (bfd *output_bfd, |
| 11774 | struct bfd_link_info *info) |
| 11775 | { |
| 11776 | bfd *dynobj; |
| 11777 | asection *sdyn; |
| 11778 | asection *sgot; |
| 11779 | struct mips_got_info *gg, *g; |
| 11780 | struct mips_elf_link_hash_table *htab; |
| 11781 | |
| 11782 | htab = mips_elf_hash_table (info); |
| 11783 | BFD_ASSERT (htab != NULL); |
| 11784 | |
| 11785 | dynobj = elf_hash_table (info)->dynobj; |
| 11786 | |
| 11787 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 11788 | |
| 11789 | sgot = htab->root.sgot; |
| 11790 | gg = htab->got_info; |
| 11791 | |
| 11792 | if (elf_hash_table (info)->dynamic_sections_created) |
| 11793 | { |
| 11794 | bfd_byte *b; |
| 11795 | int dyn_to_skip = 0, dyn_skipped = 0; |
| 11796 | |
| 11797 | BFD_ASSERT (sdyn != NULL); |
| 11798 | BFD_ASSERT (gg != NULL); |
| 11799 | |
| 11800 | g = mips_elf_bfd_got (output_bfd, FALSE); |
| 11801 | BFD_ASSERT (g != NULL); |
| 11802 | |
| 11803 | for (b = sdyn->contents; |
| 11804 | b < sdyn->contents + sdyn->size; |
| 11805 | b += MIPS_ELF_DYN_SIZE (dynobj)) |
| 11806 | { |
| 11807 | Elf_Internal_Dyn dyn; |
| 11808 | const char *name; |
| 11809 | size_t elemsize; |
| 11810 | asection *s; |
| 11811 | bfd_boolean swap_out_p; |
| 11812 | |
| 11813 | /* Read in the current dynamic entry. */ |
| 11814 | (*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn); |
| 11815 | |
| 11816 | /* Assume that we're going to modify it and write it out. */ |
| 11817 | swap_out_p = TRUE; |
| 11818 | |
| 11819 | switch (dyn.d_tag) |
| 11820 | { |
| 11821 | case DT_RELENT: |
| 11822 | dyn.d_un.d_val = MIPS_ELF_REL_SIZE (dynobj); |
| 11823 | break; |
| 11824 | |
| 11825 | case DT_RELAENT: |
| 11826 | BFD_ASSERT (htab->is_vxworks); |
| 11827 | dyn.d_un.d_val = MIPS_ELF_RELA_SIZE (dynobj); |
| 11828 | break; |
| 11829 | |
| 11830 | case DT_STRSZ: |
| 11831 | /* Rewrite DT_STRSZ. */ |
| 11832 | dyn.d_un.d_val = |
| 11833 | _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
| 11834 | break; |
| 11835 | |
| 11836 | case DT_PLTGOT: |
| 11837 | s = htab->root.sgot; |
| 11838 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 11839 | break; |
| 11840 | |
| 11841 | case DT_MIPS_PLTGOT: |
| 11842 | s = htab->root.sgotplt; |
| 11843 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 11844 | break; |
| 11845 | |
| 11846 | case DT_MIPS_RLD_VERSION: |
| 11847 | dyn.d_un.d_val = 1; /* XXX */ |
| 11848 | break; |
| 11849 | |
| 11850 | case DT_MIPS_FLAGS: |
| 11851 | dyn.d_un.d_val = RHF_NOTPOT; /* XXX */ |
| 11852 | break; |
| 11853 | |
| 11854 | case DT_MIPS_TIME_STAMP: |
| 11855 | { |
| 11856 | time_t t; |
| 11857 | time (&t); |
| 11858 | dyn.d_un.d_val = t; |
| 11859 | } |
| 11860 | break; |
| 11861 | |
| 11862 | case DT_MIPS_ICHECKSUM: |
| 11863 | /* XXX FIXME: */ |
| 11864 | swap_out_p = FALSE; |
| 11865 | break; |
| 11866 | |
| 11867 | case DT_MIPS_IVERSION: |
| 11868 | /* XXX FIXME: */ |
| 11869 | swap_out_p = FALSE; |
| 11870 | break; |
| 11871 | |
| 11872 | case DT_MIPS_BASE_ADDRESS: |
| 11873 | s = output_bfd->sections; |
| 11874 | BFD_ASSERT (s != NULL); |
| 11875 | dyn.d_un.d_ptr = s->vma & ~(bfd_vma) 0xffff; |
| 11876 | break; |
| 11877 | |
| 11878 | case DT_MIPS_LOCAL_GOTNO: |
| 11879 | dyn.d_un.d_val = g->local_gotno; |
| 11880 | break; |
| 11881 | |
| 11882 | case DT_MIPS_UNREFEXTNO: |
| 11883 | /* The index into the dynamic symbol table which is the |
| 11884 | entry of the first external symbol that is not |
| 11885 | referenced within the same object. */ |
| 11886 | dyn.d_un.d_val = bfd_count_sections (output_bfd) + 1; |
| 11887 | break; |
| 11888 | |
| 11889 | case DT_MIPS_GOTSYM: |
| 11890 | if (htab->global_gotsym) |
| 11891 | { |
| 11892 | dyn.d_un.d_val = htab->global_gotsym->dynindx; |
| 11893 | break; |
| 11894 | } |
| 11895 | /* In case if we don't have global got symbols we default |
| 11896 | to setting DT_MIPS_GOTSYM to the same value as |
| 11897 | DT_MIPS_SYMTABNO. */ |
| 11898 | /* Fall through. */ |
| 11899 | |
| 11900 | case DT_MIPS_SYMTABNO: |
| 11901 | name = ".dynsym"; |
| 11902 | elemsize = MIPS_ELF_SYM_SIZE (output_bfd); |
| 11903 | s = bfd_get_linker_section (dynobj, name); |
| 11904 | |
| 11905 | if (s != NULL) |
| 11906 | dyn.d_un.d_val = s->size / elemsize; |
| 11907 | else |
| 11908 | dyn.d_un.d_val = 0; |
| 11909 | break; |
| 11910 | |
| 11911 | case DT_MIPS_HIPAGENO: |
| 11912 | dyn.d_un.d_val = g->local_gotno - htab->reserved_gotno; |
| 11913 | break; |
| 11914 | |
| 11915 | case DT_MIPS_RLD_MAP: |
| 11916 | { |
| 11917 | struct elf_link_hash_entry *h; |
| 11918 | h = mips_elf_hash_table (info)->rld_symbol; |
| 11919 | if (!h) |
| 11920 | { |
| 11921 | dyn_to_skip = MIPS_ELF_DYN_SIZE (dynobj); |
| 11922 | swap_out_p = FALSE; |
| 11923 | break; |
| 11924 | } |
| 11925 | s = h->root.u.def.section; |
| 11926 | |
| 11927 | /* The MIPS_RLD_MAP tag stores the absolute address of the |
| 11928 | debug pointer. */ |
| 11929 | dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset |
| 11930 | + h->root.u.def.value); |
| 11931 | } |
| 11932 | break; |
| 11933 | |
| 11934 | case DT_MIPS_RLD_MAP_REL: |
| 11935 | { |
| 11936 | struct elf_link_hash_entry *h; |
| 11937 | bfd_vma dt_addr, rld_addr; |
| 11938 | h = mips_elf_hash_table (info)->rld_symbol; |
| 11939 | if (!h) |
| 11940 | { |
| 11941 | dyn_to_skip = MIPS_ELF_DYN_SIZE (dynobj); |
| 11942 | swap_out_p = FALSE; |
| 11943 | break; |
| 11944 | } |
| 11945 | s = h->root.u.def.section; |
| 11946 | |
| 11947 | /* The MIPS_RLD_MAP_REL tag stores the offset to the debug |
| 11948 | pointer, relative to the address of the tag. */ |
| 11949 | dt_addr = (sdyn->output_section->vma + sdyn->output_offset |
| 11950 | + (b - sdyn->contents)); |
| 11951 | rld_addr = (s->output_section->vma + s->output_offset |
| 11952 | + h->root.u.def.value); |
| 11953 | dyn.d_un.d_ptr = rld_addr - dt_addr; |
| 11954 | } |
| 11955 | break; |
| 11956 | |
| 11957 | case DT_MIPS_OPTIONS: |
| 11958 | s = (bfd_get_section_by_name |
| 11959 | (output_bfd, MIPS_ELF_OPTIONS_SECTION_NAME (output_bfd))); |
| 11960 | dyn.d_un.d_ptr = s->vma; |
| 11961 | break; |
| 11962 | |
| 11963 | case DT_PLTREL: |
| 11964 | BFD_ASSERT (htab->use_plts_and_copy_relocs); |
| 11965 | if (htab->is_vxworks) |
| 11966 | dyn.d_un.d_val = DT_RELA; |
| 11967 | else |
| 11968 | dyn.d_un.d_val = DT_REL; |
| 11969 | break; |
| 11970 | |
| 11971 | case DT_PLTRELSZ: |
| 11972 | BFD_ASSERT (htab->use_plts_and_copy_relocs); |
| 11973 | dyn.d_un.d_val = htab->root.srelplt->size; |
| 11974 | break; |
| 11975 | |
| 11976 | case DT_JMPREL: |
| 11977 | BFD_ASSERT (htab->use_plts_and_copy_relocs); |
| 11978 | dyn.d_un.d_ptr = (htab->root.srelplt->output_section->vma |
| 11979 | + htab->root.srelplt->output_offset); |
| 11980 | break; |
| 11981 | |
| 11982 | case DT_TEXTREL: |
| 11983 | /* If we didn't need any text relocations after all, delete |
| 11984 | the dynamic tag. */ |
| 11985 | if (!(info->flags & DF_TEXTREL)) |
| 11986 | { |
| 11987 | dyn_to_skip = MIPS_ELF_DYN_SIZE (dynobj); |
| 11988 | swap_out_p = FALSE; |
| 11989 | } |
| 11990 | break; |
| 11991 | |
| 11992 | case DT_FLAGS: |
| 11993 | /* If we didn't need any text relocations after all, clear |
| 11994 | DF_TEXTREL from DT_FLAGS. */ |
| 11995 | if (!(info->flags & DF_TEXTREL)) |
| 11996 | dyn.d_un.d_val &= ~DF_TEXTREL; |
| 11997 | else |
| 11998 | swap_out_p = FALSE; |
| 11999 | break; |
| 12000 | |
| 12001 | case DT_MIPS_XHASH: |
| 12002 | name = ".MIPS.xhash"; |
| 12003 | s = bfd_get_linker_section (dynobj, name); |
| 12004 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 12005 | break; |
| 12006 | |
| 12007 | default: |
| 12008 | swap_out_p = FALSE; |
| 12009 | if (htab->is_vxworks |
| 12010 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
| 12011 | swap_out_p = TRUE; |
| 12012 | break; |
| 12013 | } |
| 12014 | |
| 12015 | if (swap_out_p || dyn_skipped) |
| 12016 | (*get_elf_backend_data (dynobj)->s->swap_dyn_out) |
| 12017 | (dynobj, &dyn, b - dyn_skipped); |
| 12018 | |
| 12019 | if (dyn_to_skip) |
| 12020 | { |
| 12021 | dyn_skipped += dyn_to_skip; |
| 12022 | dyn_to_skip = 0; |
| 12023 | } |
| 12024 | } |
| 12025 | |
| 12026 | /* Wipe out any trailing entries if we shifted down a dynamic tag. */ |
| 12027 | if (dyn_skipped > 0) |
| 12028 | memset (b - dyn_skipped, 0, dyn_skipped); |
| 12029 | } |
| 12030 | |
| 12031 | if (sgot != NULL && sgot->size > 0 |
| 12032 | && !bfd_is_abs_section (sgot->output_section)) |
| 12033 | { |
| 12034 | if (htab->is_vxworks) |
| 12035 | { |
| 12036 | /* The first entry of the global offset table points to the |
| 12037 | ".dynamic" section. The second is initialized by the |
| 12038 | loader and contains the shared library identifier. |
| 12039 | The third is also initialized by the loader and points |
| 12040 | to the lazy resolution stub. */ |
| 12041 | MIPS_ELF_PUT_WORD (output_bfd, |
| 12042 | sdyn->output_offset + sdyn->output_section->vma, |
| 12043 | sgot->contents); |
| 12044 | MIPS_ELF_PUT_WORD (output_bfd, 0, |
| 12045 | sgot->contents + MIPS_ELF_GOT_SIZE (output_bfd)); |
| 12046 | MIPS_ELF_PUT_WORD (output_bfd, 0, |
| 12047 | sgot->contents |
| 12048 | + 2 * MIPS_ELF_GOT_SIZE (output_bfd)); |
| 12049 | } |
| 12050 | else |
| 12051 | { |
| 12052 | /* The first entry of the global offset table will be filled at |
| 12053 | runtime. The second entry will be used by some runtime loaders. |
| 12054 | This isn't the case of IRIX rld. */ |
| 12055 | MIPS_ELF_PUT_WORD (output_bfd, (bfd_vma) 0, sgot->contents); |
| 12056 | MIPS_ELF_PUT_WORD (output_bfd, MIPS_ELF_GNU_GOT1_MASK (output_bfd), |
| 12057 | sgot->contents + MIPS_ELF_GOT_SIZE (output_bfd)); |
| 12058 | } |
| 12059 | |
| 12060 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize |
| 12061 | = MIPS_ELF_GOT_SIZE (output_bfd); |
| 12062 | } |
| 12063 | |
| 12064 | /* Generate dynamic relocations for the non-primary gots. */ |
| 12065 | if (gg != NULL && gg->next) |
| 12066 | { |
| 12067 | Elf_Internal_Rela rel[3]; |
| 12068 | bfd_vma addend = 0; |
| 12069 | |
| 12070 | memset (rel, 0, sizeof (rel)); |
| 12071 | rel[0].r_info = ELF_R_INFO (output_bfd, 0, R_MIPS_REL32); |
| 12072 | |
| 12073 | for (g = gg->next; g->next != gg; g = g->next) |
| 12074 | { |
| 12075 | bfd_vma got_index = g->next->local_gotno + g->next->global_gotno |
| 12076 | + g->next->tls_gotno; |
| 12077 | |
| 12078 | MIPS_ELF_PUT_WORD (output_bfd, 0, sgot->contents |
| 12079 | + got_index++ * MIPS_ELF_GOT_SIZE (output_bfd)); |
| 12080 | MIPS_ELF_PUT_WORD (output_bfd, MIPS_ELF_GNU_GOT1_MASK (output_bfd), |
| 12081 | sgot->contents |
| 12082 | + got_index++ * MIPS_ELF_GOT_SIZE (output_bfd)); |
| 12083 | |
| 12084 | if (! bfd_link_pic (info)) |
| 12085 | continue; |
| 12086 | |
| 12087 | for (; got_index < g->local_gotno; got_index++) |
| 12088 | { |
| 12089 | if (got_index >= g->assigned_low_gotno |
| 12090 | && got_index <= g->assigned_high_gotno) |
| 12091 | continue; |
| 12092 | |
| 12093 | rel[0].r_offset = rel[1].r_offset = rel[2].r_offset |
| 12094 | = got_index * MIPS_ELF_GOT_SIZE (output_bfd); |
| 12095 | if (!(mips_elf_create_dynamic_relocation |
| 12096 | (output_bfd, info, rel, NULL, |
| 12097 | bfd_abs_section_ptr, |
| 12098 | 0, &addend, sgot))) |
| 12099 | return FALSE; |
| 12100 | BFD_ASSERT (addend == 0); |
| 12101 | } |
| 12102 | } |
| 12103 | } |
| 12104 | |
| 12105 | /* The generation of dynamic relocations for the non-primary gots |
| 12106 | adds more dynamic relocations. We cannot count them until |
| 12107 | here. */ |
| 12108 | |
| 12109 | if (elf_hash_table (info)->dynamic_sections_created) |
| 12110 | { |
| 12111 | bfd_byte *b; |
| 12112 | bfd_boolean swap_out_p; |
| 12113 | |
| 12114 | BFD_ASSERT (sdyn != NULL); |
| 12115 | |
| 12116 | for (b = sdyn->contents; |
| 12117 | b < sdyn->contents + sdyn->size; |
| 12118 | b += MIPS_ELF_DYN_SIZE (dynobj)) |
| 12119 | { |
| 12120 | Elf_Internal_Dyn dyn; |
| 12121 | asection *s; |
| 12122 | |
| 12123 | /* Read in the current dynamic entry. */ |
| 12124 | (*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn); |
| 12125 | |
| 12126 | /* Assume that we're going to modify it and write it out. */ |
| 12127 | swap_out_p = TRUE; |
| 12128 | |
| 12129 | switch (dyn.d_tag) |
| 12130 | { |
| 12131 | case DT_RELSZ: |
| 12132 | /* Reduce DT_RELSZ to account for any relocations we |
| 12133 | decided not to make. This is for the n64 irix rld, |
| 12134 | which doesn't seem to apply any relocations if there |
| 12135 | are trailing null entries. */ |
| 12136 | s = mips_elf_rel_dyn_section (info, FALSE); |
| 12137 | dyn.d_un.d_val = (s->reloc_count |
| 12138 | * (ABI_64_P (output_bfd) |
| 12139 | ? sizeof (Elf64_Mips_External_Rel) |
| 12140 | : sizeof (Elf32_External_Rel))); |
| 12141 | /* Adjust the section size too. Tools like the prelinker |
| 12142 | can reasonably expect the values to the same. */ |
| 12143 | BFD_ASSERT (!bfd_is_abs_section (s->output_section)); |
| 12144 | elf_section_data (s->output_section)->this_hdr.sh_size |
| 12145 | = dyn.d_un.d_val; |
| 12146 | break; |
| 12147 | |
| 12148 | default: |
| 12149 | swap_out_p = FALSE; |
| 12150 | break; |
| 12151 | } |
| 12152 | |
| 12153 | if (swap_out_p) |
| 12154 | (*get_elf_backend_data (dynobj)->s->swap_dyn_out) |
| 12155 | (dynobj, &dyn, b); |
| 12156 | } |
| 12157 | } |
| 12158 | |
| 12159 | { |
| 12160 | asection *s; |
| 12161 | Elf32_compact_rel cpt; |
| 12162 | |
| 12163 | if (SGI_COMPAT (output_bfd)) |
| 12164 | { |
| 12165 | /* Write .compact_rel section out. */ |
| 12166 | s = bfd_get_linker_section (dynobj, ".compact_rel"); |
| 12167 | if (s != NULL) |
| 12168 | { |
| 12169 | cpt.id1 = 1; |
| 12170 | cpt.num = s->reloc_count; |
| 12171 | cpt.id2 = 2; |
| 12172 | cpt.offset = (s->output_section->filepos |
| 12173 | + sizeof (Elf32_External_compact_rel)); |
| 12174 | cpt.reserved0 = 0; |
| 12175 | cpt.reserved1 = 0; |
| 12176 | bfd_elf32_swap_compact_rel_out (output_bfd, &cpt, |
| 12177 | ((Elf32_External_compact_rel *) |
| 12178 | s->contents)); |
| 12179 | |
| 12180 | /* Clean up a dummy stub function entry in .text. */ |
| 12181 | if (htab->sstubs != NULL) |
| 12182 | { |
| 12183 | file_ptr dummy_offset; |
| 12184 | |
| 12185 | BFD_ASSERT (htab->sstubs->size >= htab->function_stub_size); |
| 12186 | dummy_offset = htab->sstubs->size - htab->function_stub_size; |
| 12187 | memset (htab->sstubs->contents + dummy_offset, 0, |
| 12188 | htab->function_stub_size); |
| 12189 | } |
| 12190 | } |
| 12191 | } |
| 12192 | |
| 12193 | /* The psABI says that the dynamic relocations must be sorted in |
| 12194 | increasing order of r_symndx. The VxWorks EABI doesn't require |
| 12195 | this, and because the code below handles REL rather than RELA |
| 12196 | relocations, using it for VxWorks would be outright harmful. */ |
| 12197 | if (!htab->is_vxworks) |
| 12198 | { |
| 12199 | s = mips_elf_rel_dyn_section (info, FALSE); |
| 12200 | if (s != NULL |
| 12201 | && s->size > (bfd_vma)2 * MIPS_ELF_REL_SIZE (output_bfd)) |
| 12202 | { |
| 12203 | reldyn_sorting_bfd = output_bfd; |
| 12204 | |
| 12205 | if (ABI_64_P (output_bfd)) |
| 12206 | qsort ((Elf64_External_Rel *) s->contents + 1, |
| 12207 | s->reloc_count - 1, sizeof (Elf64_Mips_External_Rel), |
| 12208 | sort_dynamic_relocs_64); |
| 12209 | else |
| 12210 | qsort ((Elf32_External_Rel *) s->contents + 1, |
| 12211 | s->reloc_count - 1, sizeof (Elf32_External_Rel), |
| 12212 | sort_dynamic_relocs); |
| 12213 | } |
| 12214 | } |
| 12215 | } |
| 12216 | |
| 12217 | if (htab->root.splt && htab->root.splt->size > 0) |
| 12218 | { |
| 12219 | if (htab->is_vxworks) |
| 12220 | { |
| 12221 | if (bfd_link_pic (info)) |
| 12222 | mips_vxworks_finish_shared_plt (output_bfd, info); |
| 12223 | else |
| 12224 | mips_vxworks_finish_exec_plt (output_bfd, info); |
| 12225 | } |
| 12226 | else |
| 12227 | { |
| 12228 | BFD_ASSERT (!bfd_link_pic (info)); |
| 12229 | if (!mips_finish_exec_plt (output_bfd, info)) |
| 12230 | return FALSE; |
| 12231 | } |
| 12232 | } |
| 12233 | return TRUE; |
| 12234 | } |
| 12235 | |
| 12236 | |
| 12237 | /* Set ABFD's EF_MIPS_ARCH and EF_MIPS_MACH flags. */ |
| 12238 | |
| 12239 | static void |
| 12240 | mips_set_isa_flags (bfd *abfd) |
| 12241 | { |
| 12242 | flagword val; |
| 12243 | |
| 12244 | switch (bfd_get_mach (abfd)) |
| 12245 | { |
| 12246 | default: |
| 12247 | if (ABI_N32_P (abfd) || ABI_64_P (abfd)) |
| 12248 | val = E_MIPS_ARCH_3; |
| 12249 | else |
| 12250 | val = E_MIPS_ARCH_1; |
| 12251 | break; |
| 12252 | |
| 12253 | case bfd_mach_mips3000: |
| 12254 | val = E_MIPS_ARCH_1; |
| 12255 | break; |
| 12256 | |
| 12257 | case bfd_mach_mips3900: |
| 12258 | val = E_MIPS_ARCH_1 | E_MIPS_MACH_3900; |
| 12259 | break; |
| 12260 | |
| 12261 | case bfd_mach_mips6000: |
| 12262 | val = E_MIPS_ARCH_2; |
| 12263 | break; |
| 12264 | |
| 12265 | case bfd_mach_mips4010: |
| 12266 | val = E_MIPS_ARCH_2 | E_MIPS_MACH_4010; |
| 12267 | break; |
| 12268 | |
| 12269 | case bfd_mach_mips4000: |
| 12270 | case bfd_mach_mips4300: |
| 12271 | case bfd_mach_mips4400: |
| 12272 | case bfd_mach_mips4600: |
| 12273 | val = E_MIPS_ARCH_3; |
| 12274 | break; |
| 12275 | |
| 12276 | case bfd_mach_mips4100: |
| 12277 | val = E_MIPS_ARCH_3 | E_MIPS_MACH_4100; |
| 12278 | break; |
| 12279 | |
| 12280 | case bfd_mach_mips4111: |
| 12281 | val = E_MIPS_ARCH_3 | E_MIPS_MACH_4111; |
| 12282 | break; |
| 12283 | |
| 12284 | case bfd_mach_mips4120: |
| 12285 | val = E_MIPS_ARCH_3 | E_MIPS_MACH_4120; |
| 12286 | break; |
| 12287 | |
| 12288 | case bfd_mach_mips4650: |
| 12289 | val = E_MIPS_ARCH_3 | E_MIPS_MACH_4650; |
| 12290 | break; |
| 12291 | |
| 12292 | case bfd_mach_mips5400: |
| 12293 | val = E_MIPS_ARCH_4 | E_MIPS_MACH_5400; |
| 12294 | break; |
| 12295 | |
| 12296 | case bfd_mach_mips5500: |
| 12297 | val = E_MIPS_ARCH_4 | E_MIPS_MACH_5500; |
| 12298 | break; |
| 12299 | |
| 12300 | case bfd_mach_mips5900: |
| 12301 | val = E_MIPS_ARCH_3 | E_MIPS_MACH_5900; |
| 12302 | break; |
| 12303 | |
| 12304 | case bfd_mach_mips9000: |
| 12305 | val = E_MIPS_ARCH_4 | E_MIPS_MACH_9000; |
| 12306 | break; |
| 12307 | |
| 12308 | case bfd_mach_mips5000: |
| 12309 | case bfd_mach_mips7000: |
| 12310 | case bfd_mach_mips8000: |
| 12311 | case bfd_mach_mips10000: |
| 12312 | case bfd_mach_mips12000: |
| 12313 | case bfd_mach_mips14000: |
| 12314 | case bfd_mach_mips16000: |
| 12315 | val = E_MIPS_ARCH_4; |
| 12316 | break; |
| 12317 | |
| 12318 | case bfd_mach_mips5: |
| 12319 | val = E_MIPS_ARCH_5; |
| 12320 | break; |
| 12321 | |
| 12322 | case bfd_mach_mips_loongson_2e: |
| 12323 | val = E_MIPS_ARCH_3 | E_MIPS_MACH_LS2E; |
| 12324 | break; |
| 12325 | |
| 12326 | case bfd_mach_mips_loongson_2f: |
| 12327 | val = E_MIPS_ARCH_3 | E_MIPS_MACH_LS2F; |
| 12328 | break; |
| 12329 | |
| 12330 | case bfd_mach_mips_sb1: |
| 12331 | val = E_MIPS_ARCH_64 | E_MIPS_MACH_SB1; |
| 12332 | break; |
| 12333 | |
| 12334 | case bfd_mach_mips_gs464: |
| 12335 | val = E_MIPS_ARCH_64R2 | E_MIPS_MACH_GS464; |
| 12336 | break; |
| 12337 | |
| 12338 | case bfd_mach_mips_gs464e: |
| 12339 | val = E_MIPS_ARCH_64R2 | E_MIPS_MACH_GS464E; |
| 12340 | break; |
| 12341 | |
| 12342 | case bfd_mach_mips_gs264e: |
| 12343 | val = E_MIPS_ARCH_64R2 | E_MIPS_MACH_GS264E; |
| 12344 | break; |
| 12345 | |
| 12346 | case bfd_mach_mips_octeon: |
| 12347 | case bfd_mach_mips_octeonp: |
| 12348 | val = E_MIPS_ARCH_64R2 | E_MIPS_MACH_OCTEON; |
| 12349 | break; |
| 12350 | |
| 12351 | case bfd_mach_mips_octeon3: |
| 12352 | val = E_MIPS_ARCH_64R2 | E_MIPS_MACH_OCTEON3; |
| 12353 | break; |
| 12354 | |
| 12355 | case bfd_mach_mips_xlr: |
| 12356 | val = E_MIPS_ARCH_64 | E_MIPS_MACH_XLR; |
| 12357 | break; |
| 12358 | |
| 12359 | case bfd_mach_mips_octeon2: |
| 12360 | val = E_MIPS_ARCH_64R2 | E_MIPS_MACH_OCTEON2; |
| 12361 | break; |
| 12362 | |
| 12363 | case bfd_mach_mipsisa32: |
| 12364 | val = E_MIPS_ARCH_32; |
| 12365 | break; |
| 12366 | |
| 12367 | case bfd_mach_mipsisa64: |
| 12368 | val = E_MIPS_ARCH_64; |
| 12369 | break; |
| 12370 | |
| 12371 | case bfd_mach_mipsisa32r2: |
| 12372 | case bfd_mach_mipsisa32r3: |
| 12373 | case bfd_mach_mipsisa32r5: |
| 12374 | val = E_MIPS_ARCH_32R2; |
| 12375 | break; |
| 12376 | |
| 12377 | case bfd_mach_mips_interaptiv_mr2: |
| 12378 | val = E_MIPS_ARCH_32R2 | E_MIPS_MACH_IAMR2; |
| 12379 | break; |
| 12380 | |
| 12381 | case bfd_mach_mipsisa64r2: |
| 12382 | case bfd_mach_mipsisa64r3: |
| 12383 | case bfd_mach_mipsisa64r5: |
| 12384 | val = E_MIPS_ARCH_64R2; |
| 12385 | break; |
| 12386 | |
| 12387 | case bfd_mach_mipsisa32r6: |
| 12388 | val = E_MIPS_ARCH_32R6; |
| 12389 | break; |
| 12390 | |
| 12391 | case bfd_mach_mipsisa64r6: |
| 12392 | val = E_MIPS_ARCH_64R6; |
| 12393 | break; |
| 12394 | } |
| 12395 | elf_elfheader (abfd)->e_flags &= ~(EF_MIPS_ARCH | EF_MIPS_MACH); |
| 12396 | elf_elfheader (abfd)->e_flags |= val; |
| 12397 | |
| 12398 | } |
| 12399 | |
| 12400 | |
| 12401 | /* Whether to sort relocs output by ld -r or ld --emit-relocs, by r_offset. |
| 12402 | Don't do so for code sections. We want to keep ordering of HI16/LO16 |
| 12403 | as is. On the other hand, elf-eh-frame.c processing requires .eh_frame |
| 12404 | relocs to be sorted. */ |
| 12405 | |
| 12406 | bfd_boolean |
| 12407 | _bfd_mips_elf_sort_relocs_p (asection *sec) |
| 12408 | { |
| 12409 | return (sec->flags & SEC_CODE) == 0; |
| 12410 | } |
| 12411 | |
| 12412 | |
| 12413 | /* The final processing done just before writing out a MIPS ELF object |
| 12414 | file. This gets the MIPS architecture right based on the machine |
| 12415 | number. This is used by both the 32-bit and the 64-bit ABI. */ |
| 12416 | |
| 12417 | void |
| 12418 | _bfd_mips_final_write_processing (bfd *abfd) |
| 12419 | { |
| 12420 | unsigned int i; |
| 12421 | Elf_Internal_Shdr **hdrpp; |
| 12422 | const char *name; |
| 12423 | asection *sec; |
| 12424 | |
| 12425 | /* Keep the existing EF_MIPS_MACH and EF_MIPS_ARCH flags if the former |
| 12426 | is nonzero. This is for compatibility with old objects, which used |
| 12427 | a combination of a 32-bit EF_MIPS_ARCH and a 64-bit EF_MIPS_MACH. */ |
| 12428 | if ((elf_elfheader (abfd)->e_flags & EF_MIPS_MACH) == 0) |
| 12429 | mips_set_isa_flags (abfd); |
| 12430 | |
| 12431 | /* Set the sh_info field for .gptab sections and other appropriate |
| 12432 | info for each special section. */ |
| 12433 | for (i = 1, hdrpp = elf_elfsections (abfd) + 1; |
| 12434 | i < elf_numsections (abfd); |
| 12435 | i++, hdrpp++) |
| 12436 | { |
| 12437 | switch ((*hdrpp)->sh_type) |
| 12438 | { |
| 12439 | case SHT_MIPS_MSYM: |
| 12440 | case SHT_MIPS_LIBLIST: |
| 12441 | sec = bfd_get_section_by_name (abfd, ".dynstr"); |
| 12442 | if (sec != NULL) |
| 12443 | (*hdrpp)->sh_link = elf_section_data (sec)->this_idx; |
| 12444 | break; |
| 12445 | |
| 12446 | case SHT_MIPS_GPTAB: |
| 12447 | BFD_ASSERT ((*hdrpp)->bfd_section != NULL); |
| 12448 | name = bfd_section_name ((*hdrpp)->bfd_section); |
| 12449 | BFD_ASSERT (name != NULL |
| 12450 | && CONST_STRNEQ (name, ".gptab.")); |
| 12451 | sec = bfd_get_section_by_name (abfd, name + sizeof ".gptab" - 1); |
| 12452 | BFD_ASSERT (sec != NULL); |
| 12453 | (*hdrpp)->sh_info = elf_section_data (sec)->this_idx; |
| 12454 | break; |
| 12455 | |
| 12456 | case SHT_MIPS_CONTENT: |
| 12457 | BFD_ASSERT ((*hdrpp)->bfd_section != NULL); |
| 12458 | name = bfd_section_name ((*hdrpp)->bfd_section); |
| 12459 | BFD_ASSERT (name != NULL |
| 12460 | && CONST_STRNEQ (name, ".MIPS.content")); |
| 12461 | sec = bfd_get_section_by_name (abfd, |
| 12462 | name + sizeof ".MIPS.content" - 1); |
| 12463 | BFD_ASSERT (sec != NULL); |
| 12464 | (*hdrpp)->sh_link = elf_section_data (sec)->this_idx; |
| 12465 | break; |
| 12466 | |
| 12467 | case SHT_MIPS_SYMBOL_LIB: |
| 12468 | sec = bfd_get_section_by_name (abfd, ".dynsym"); |
| 12469 | if (sec != NULL) |
| 12470 | (*hdrpp)->sh_link = elf_section_data (sec)->this_idx; |
| 12471 | sec = bfd_get_section_by_name (abfd, ".liblist"); |
| 12472 | if (sec != NULL) |
| 12473 | (*hdrpp)->sh_info = elf_section_data (sec)->this_idx; |
| 12474 | break; |
| 12475 | |
| 12476 | case SHT_MIPS_EVENTS: |
| 12477 | BFD_ASSERT ((*hdrpp)->bfd_section != NULL); |
| 12478 | name = bfd_section_name ((*hdrpp)->bfd_section); |
| 12479 | BFD_ASSERT (name != NULL); |
| 12480 | if (CONST_STRNEQ (name, ".MIPS.events")) |
| 12481 | sec = bfd_get_section_by_name (abfd, |
| 12482 | name + sizeof ".MIPS.events" - 1); |
| 12483 | else |
| 12484 | { |
| 12485 | BFD_ASSERT (CONST_STRNEQ (name, ".MIPS.post_rel")); |
| 12486 | sec = bfd_get_section_by_name (abfd, |
| 12487 | (name |
| 12488 | + sizeof ".MIPS.post_rel" - 1)); |
| 12489 | } |
| 12490 | BFD_ASSERT (sec != NULL); |
| 12491 | (*hdrpp)->sh_link = elf_section_data (sec)->this_idx; |
| 12492 | break; |
| 12493 | |
| 12494 | case SHT_MIPS_XHASH: |
| 12495 | sec = bfd_get_section_by_name (abfd, ".dynsym"); |
| 12496 | if (sec != NULL) |
| 12497 | (*hdrpp)->sh_link = elf_section_data (sec)->this_idx; |
| 12498 | } |
| 12499 | } |
| 12500 | } |
| 12501 | |
| 12502 | bfd_boolean |
| 12503 | _bfd_mips_elf_final_write_processing (bfd *abfd) |
| 12504 | { |
| 12505 | _bfd_mips_final_write_processing (abfd); |
| 12506 | return _bfd_elf_final_write_processing (abfd); |
| 12507 | } |
| 12508 | \f |
| 12509 | /* When creating an IRIX5 executable, we need REGINFO and RTPROC |
| 12510 | segments. */ |
| 12511 | |
| 12512 | int |
| 12513 | _bfd_mips_elf_additional_program_headers (bfd *abfd, |
| 12514 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 12515 | { |
| 12516 | asection *s; |
| 12517 | int ret = 0; |
| 12518 | |
| 12519 | /* See if we need a PT_MIPS_REGINFO segment. */ |
| 12520 | s = bfd_get_section_by_name (abfd, ".reginfo"); |
| 12521 | if (s && (s->flags & SEC_LOAD)) |
| 12522 | ++ret; |
| 12523 | |
| 12524 | /* See if we need a PT_MIPS_ABIFLAGS segment. */ |
| 12525 | if (bfd_get_section_by_name (abfd, ".MIPS.abiflags")) |
| 12526 | ++ret; |
| 12527 | |
| 12528 | /* See if we need a PT_MIPS_OPTIONS segment. */ |
| 12529 | if (IRIX_COMPAT (abfd) == ict_irix6 |
| 12530 | && bfd_get_section_by_name (abfd, |
| 12531 | MIPS_ELF_OPTIONS_SECTION_NAME (abfd))) |
| 12532 | ++ret; |
| 12533 | |
| 12534 | /* See if we need a PT_MIPS_RTPROC segment. */ |
| 12535 | if (IRIX_COMPAT (abfd) == ict_irix5 |
| 12536 | && bfd_get_section_by_name (abfd, ".dynamic") |
| 12537 | && bfd_get_section_by_name (abfd, ".mdebug")) |
| 12538 | ++ret; |
| 12539 | |
| 12540 | /* Allocate a PT_NULL header in dynamic objects. See |
| 12541 | _bfd_mips_elf_modify_segment_map for details. */ |
| 12542 | if (!SGI_COMPAT (abfd) |
| 12543 | && bfd_get_section_by_name (abfd, ".dynamic")) |
| 12544 | ++ret; |
| 12545 | |
| 12546 | return ret; |
| 12547 | } |
| 12548 | |
| 12549 | /* Modify the segment map for an IRIX5 executable. */ |
| 12550 | |
| 12551 | bfd_boolean |
| 12552 | _bfd_mips_elf_modify_segment_map (bfd *abfd, |
| 12553 | struct bfd_link_info *info) |
| 12554 | { |
| 12555 | asection *s; |
| 12556 | struct elf_segment_map *m, **pm; |
| 12557 | size_t amt; |
| 12558 | |
| 12559 | /* If there is a .reginfo section, we need a PT_MIPS_REGINFO |
| 12560 | segment. */ |
| 12561 | s = bfd_get_section_by_name (abfd, ".reginfo"); |
| 12562 | if (s != NULL && (s->flags & SEC_LOAD) != 0) |
| 12563 | { |
| 12564 | for (m = elf_seg_map (abfd); m != NULL; m = m->next) |
| 12565 | if (m->p_type == PT_MIPS_REGINFO) |
| 12566 | break; |
| 12567 | if (m == NULL) |
| 12568 | { |
| 12569 | amt = sizeof *m; |
| 12570 | m = bfd_zalloc (abfd, amt); |
| 12571 | if (m == NULL) |
| 12572 | return FALSE; |
| 12573 | |
| 12574 | m->p_type = PT_MIPS_REGINFO; |
| 12575 | m->count = 1; |
| 12576 | m->sections[0] = s; |
| 12577 | |
| 12578 | /* We want to put it after the PHDR and INTERP segments. */ |
| 12579 | pm = &elf_seg_map (abfd); |
| 12580 | while (*pm != NULL |
| 12581 | && ((*pm)->p_type == PT_PHDR |
| 12582 | || (*pm)->p_type == PT_INTERP)) |
| 12583 | pm = &(*pm)->next; |
| 12584 | |
| 12585 | m->next = *pm; |
| 12586 | *pm = m; |
| 12587 | } |
| 12588 | } |
| 12589 | |
| 12590 | /* If there is a .MIPS.abiflags section, we need a PT_MIPS_ABIFLAGS |
| 12591 | segment. */ |
| 12592 | s = bfd_get_section_by_name (abfd, ".MIPS.abiflags"); |
| 12593 | if (s != NULL && (s->flags & SEC_LOAD) != 0) |
| 12594 | { |
| 12595 | for (m = elf_seg_map (abfd); m != NULL; m = m->next) |
| 12596 | if (m->p_type == PT_MIPS_ABIFLAGS) |
| 12597 | break; |
| 12598 | if (m == NULL) |
| 12599 | { |
| 12600 | amt = sizeof *m; |
| 12601 | m = bfd_zalloc (abfd, amt); |
| 12602 | if (m == NULL) |
| 12603 | return FALSE; |
| 12604 | |
| 12605 | m->p_type = PT_MIPS_ABIFLAGS; |
| 12606 | m->count = 1; |
| 12607 | m->sections[0] = s; |
| 12608 | |
| 12609 | /* We want to put it after the PHDR and INTERP segments. */ |
| 12610 | pm = &elf_seg_map (abfd); |
| 12611 | while (*pm != NULL |
| 12612 | && ((*pm)->p_type == PT_PHDR |
| 12613 | || (*pm)->p_type == PT_INTERP)) |
| 12614 | pm = &(*pm)->next; |
| 12615 | |
| 12616 | m->next = *pm; |
| 12617 | *pm = m; |
| 12618 | } |
| 12619 | } |
| 12620 | |
| 12621 | /* For IRIX 6, we don't have .mdebug sections, nor does anything but |
| 12622 | .dynamic end up in PT_DYNAMIC. However, we do have to insert a |
| 12623 | PT_MIPS_OPTIONS segment immediately following the program header |
| 12624 | table. */ |
| 12625 | if (NEWABI_P (abfd) |
| 12626 | /* On non-IRIX6 new abi, we'll have already created a segment |
| 12627 | for this section, so don't create another. I'm not sure this |
| 12628 | is not also the case for IRIX 6, but I can't test it right |
| 12629 | now. */ |
| 12630 | && IRIX_COMPAT (abfd) == ict_irix6) |
| 12631 | { |
| 12632 | for (s = abfd->sections; s; s = s->next) |
| 12633 | if (elf_section_data (s)->this_hdr.sh_type == SHT_MIPS_OPTIONS) |
| 12634 | break; |
| 12635 | |
| 12636 | if (s) |
| 12637 | { |
| 12638 | struct elf_segment_map *options_segment; |
| 12639 | |
| 12640 | pm = &elf_seg_map (abfd); |
| 12641 | while (*pm != NULL |
| 12642 | && ((*pm)->p_type == PT_PHDR |
| 12643 | || (*pm)->p_type == PT_INTERP)) |
| 12644 | pm = &(*pm)->next; |
| 12645 | |
| 12646 | if (*pm == NULL || (*pm)->p_type != PT_MIPS_OPTIONS) |
| 12647 | { |
| 12648 | amt = sizeof (struct elf_segment_map); |
| 12649 | options_segment = bfd_zalloc (abfd, amt); |
| 12650 | options_segment->next = *pm; |
| 12651 | options_segment->p_type = PT_MIPS_OPTIONS; |
| 12652 | options_segment->p_flags = PF_R; |
| 12653 | options_segment->p_flags_valid = TRUE; |
| 12654 | options_segment->count = 1; |
| 12655 | options_segment->sections[0] = s; |
| 12656 | *pm = options_segment; |
| 12657 | } |
| 12658 | } |
| 12659 | } |
| 12660 | else |
| 12661 | { |
| 12662 | if (IRIX_COMPAT (abfd) == ict_irix5) |
| 12663 | { |
| 12664 | /* If there are .dynamic and .mdebug sections, we make a room |
| 12665 | for the RTPROC header. FIXME: Rewrite without section names. */ |
| 12666 | if (bfd_get_section_by_name (abfd, ".interp") == NULL |
| 12667 | && bfd_get_section_by_name (abfd, ".dynamic") != NULL |
| 12668 | && bfd_get_section_by_name (abfd, ".mdebug") != NULL) |
| 12669 | { |
| 12670 | for (m = elf_seg_map (abfd); m != NULL; m = m->next) |
| 12671 | if (m->p_type == PT_MIPS_RTPROC) |
| 12672 | break; |
| 12673 | if (m == NULL) |
| 12674 | { |
| 12675 | amt = sizeof *m; |
| 12676 | m = bfd_zalloc (abfd, amt); |
| 12677 | if (m == NULL) |
| 12678 | return FALSE; |
| 12679 | |
| 12680 | m->p_type = PT_MIPS_RTPROC; |
| 12681 | |
| 12682 | s = bfd_get_section_by_name (abfd, ".rtproc"); |
| 12683 | if (s == NULL) |
| 12684 | { |
| 12685 | m->count = 0; |
| 12686 | m->p_flags = 0; |
| 12687 | m->p_flags_valid = 1; |
| 12688 | } |
| 12689 | else |
| 12690 | { |
| 12691 | m->count = 1; |
| 12692 | m->sections[0] = s; |
| 12693 | } |
| 12694 | |
| 12695 | /* We want to put it after the DYNAMIC segment. */ |
| 12696 | pm = &elf_seg_map (abfd); |
| 12697 | while (*pm != NULL && (*pm)->p_type != PT_DYNAMIC) |
| 12698 | pm = &(*pm)->next; |
| 12699 | if (*pm != NULL) |
| 12700 | pm = &(*pm)->next; |
| 12701 | |
| 12702 | m->next = *pm; |
| 12703 | *pm = m; |
| 12704 | } |
| 12705 | } |
| 12706 | } |
| 12707 | /* On IRIX5, the PT_DYNAMIC segment includes the .dynamic, |
| 12708 | .dynstr, .dynsym, and .hash sections, and everything in |
| 12709 | between. */ |
| 12710 | for (pm = &elf_seg_map (abfd); *pm != NULL; |
| 12711 | pm = &(*pm)->next) |
| 12712 | if ((*pm)->p_type == PT_DYNAMIC) |
| 12713 | break; |
| 12714 | m = *pm; |
| 12715 | /* GNU/Linux binaries do not need the extended PT_DYNAMIC section. |
| 12716 | glibc's dynamic linker has traditionally derived the number of |
| 12717 | tags from the p_filesz field, and sometimes allocates stack |
| 12718 | arrays of that size. An overly-big PT_DYNAMIC segment can |
| 12719 | be actively harmful in such cases. Making PT_DYNAMIC contain |
| 12720 | other sections can also make life hard for the prelinker, |
| 12721 | which might move one of the other sections to a different |
| 12722 | PT_LOAD segment. */ |
| 12723 | if (SGI_COMPAT (abfd) |
| 12724 | && m != NULL |
| 12725 | && m->count == 1 |
| 12726 | && strcmp (m->sections[0]->name, ".dynamic") == 0) |
| 12727 | { |
| 12728 | static const char *sec_names[] = |
| 12729 | { |
| 12730 | ".dynamic", ".dynstr", ".dynsym", ".hash" |
| 12731 | }; |
| 12732 | bfd_vma low, high; |
| 12733 | unsigned int i, c; |
| 12734 | struct elf_segment_map *n; |
| 12735 | |
| 12736 | low = ~(bfd_vma) 0; |
| 12737 | high = 0; |
| 12738 | for (i = 0; i < sizeof sec_names / sizeof sec_names[0]; i++) |
| 12739 | { |
| 12740 | s = bfd_get_section_by_name (abfd, sec_names[i]); |
| 12741 | if (s != NULL && (s->flags & SEC_LOAD) != 0) |
| 12742 | { |
| 12743 | bfd_size_type sz; |
| 12744 | |
| 12745 | if (low > s->vma) |
| 12746 | low = s->vma; |
| 12747 | sz = s->size; |
| 12748 | if (high < s->vma + sz) |
| 12749 | high = s->vma + sz; |
| 12750 | } |
| 12751 | } |
| 12752 | |
| 12753 | c = 0; |
| 12754 | for (s = abfd->sections; s != NULL; s = s->next) |
| 12755 | if ((s->flags & SEC_LOAD) != 0 |
| 12756 | && s->vma >= low |
| 12757 | && s->vma + s->size <= high) |
| 12758 | ++c; |
| 12759 | |
| 12760 | amt = sizeof *n - sizeof (asection *) + c * sizeof (asection *); |
| 12761 | n = bfd_zalloc (abfd, amt); |
| 12762 | if (n == NULL) |
| 12763 | return FALSE; |
| 12764 | *n = *m; |
| 12765 | n->count = c; |
| 12766 | |
| 12767 | i = 0; |
| 12768 | for (s = abfd->sections; s != NULL; s = s->next) |
| 12769 | { |
| 12770 | if ((s->flags & SEC_LOAD) != 0 |
| 12771 | && s->vma >= low |
| 12772 | && s->vma + s->size <= high) |
| 12773 | { |
| 12774 | n->sections[i] = s; |
| 12775 | ++i; |
| 12776 | } |
| 12777 | } |
| 12778 | |
| 12779 | *pm = n; |
| 12780 | } |
| 12781 | } |
| 12782 | |
| 12783 | /* Allocate a spare program header in dynamic objects so that tools |
| 12784 | like the prelinker can add an extra PT_LOAD entry. |
| 12785 | |
| 12786 | If the prelinker needs to make room for a new PT_LOAD entry, its |
| 12787 | standard procedure is to move the first (read-only) sections into |
| 12788 | the new (writable) segment. However, the MIPS ABI requires |
| 12789 | .dynamic to be in a read-only segment, and the section will often |
| 12790 | start within sizeof (ElfNN_Phdr) bytes of the last program header. |
| 12791 | |
| 12792 | Although the prelinker could in principle move .dynamic to a |
| 12793 | writable segment, it seems better to allocate a spare program |
| 12794 | header instead, and avoid the need to move any sections. |
| 12795 | There is a long tradition of allocating spare dynamic tags, |
| 12796 | so allocating a spare program header seems like a natural |
| 12797 | extension. |
| 12798 | |
| 12799 | If INFO is NULL, we may be copying an already prelinked binary |
| 12800 | with objcopy or strip, so do not add this header. */ |
| 12801 | if (info != NULL |
| 12802 | && !SGI_COMPAT (abfd) |
| 12803 | && bfd_get_section_by_name (abfd, ".dynamic")) |
| 12804 | { |
| 12805 | for (pm = &elf_seg_map (abfd); *pm != NULL; pm = &(*pm)->next) |
| 12806 | if ((*pm)->p_type == PT_NULL) |
| 12807 | break; |
| 12808 | if (*pm == NULL) |
| 12809 | { |
| 12810 | m = bfd_zalloc (abfd, sizeof (*m)); |
| 12811 | if (m == NULL) |
| 12812 | return FALSE; |
| 12813 | |
| 12814 | m->p_type = PT_NULL; |
| 12815 | *pm = m; |
| 12816 | } |
| 12817 | } |
| 12818 | |
| 12819 | return TRUE; |
| 12820 | } |
| 12821 | \f |
| 12822 | /* Return the section that should be marked against GC for a given |
| 12823 | relocation. */ |
| 12824 | |
| 12825 | asection * |
| 12826 | _bfd_mips_elf_gc_mark_hook (asection *sec, |
| 12827 | struct bfd_link_info *info, |
| 12828 | Elf_Internal_Rela *rel, |
| 12829 | struct elf_link_hash_entry *h, |
| 12830 | Elf_Internal_Sym *sym) |
| 12831 | { |
| 12832 | /* ??? Do mips16 stub sections need to be handled special? */ |
| 12833 | |
| 12834 | if (h != NULL) |
| 12835 | switch (ELF_R_TYPE (sec->owner, rel->r_info)) |
| 12836 | { |
| 12837 | case R_MIPS_GNU_VTINHERIT: |
| 12838 | case R_MIPS_GNU_VTENTRY: |
| 12839 | return NULL; |
| 12840 | } |
| 12841 | |
| 12842 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 12843 | } |
| 12844 | |
| 12845 | /* Prevent .MIPS.abiflags from being discarded with --gc-sections. */ |
| 12846 | |
| 12847 | bfd_boolean |
| 12848 | _bfd_mips_elf_gc_mark_extra_sections (struct bfd_link_info *info, |
| 12849 | elf_gc_mark_hook_fn gc_mark_hook) |
| 12850 | { |
| 12851 | bfd *sub; |
| 12852 | |
| 12853 | _bfd_elf_gc_mark_extra_sections (info, gc_mark_hook); |
| 12854 | |
| 12855 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
| 12856 | { |
| 12857 | asection *o; |
| 12858 | |
| 12859 | if (! is_mips_elf (sub)) |
| 12860 | continue; |
| 12861 | |
| 12862 | for (o = sub->sections; o != NULL; o = o->next) |
| 12863 | if (!o->gc_mark |
| 12864 | && MIPS_ELF_ABIFLAGS_SECTION_NAME_P (bfd_section_name (o))) |
| 12865 | { |
| 12866 | if (!_bfd_elf_gc_mark (info, o, gc_mark_hook)) |
| 12867 | return FALSE; |
| 12868 | } |
| 12869 | } |
| 12870 | |
| 12871 | return TRUE; |
| 12872 | } |
| 12873 | \f |
| 12874 | /* Copy data from a MIPS ELF indirect symbol to its direct symbol, |
| 12875 | hiding the old indirect symbol. Process additional relocation |
| 12876 | information. Also called for weakdefs, in which case we just let |
| 12877 | _bfd_elf_link_hash_copy_indirect copy the flags for us. */ |
| 12878 | |
| 12879 | void |
| 12880 | _bfd_mips_elf_copy_indirect_symbol (struct bfd_link_info *info, |
| 12881 | struct elf_link_hash_entry *dir, |
| 12882 | struct elf_link_hash_entry *ind) |
| 12883 | { |
| 12884 | struct mips_elf_link_hash_entry *dirmips, *indmips; |
| 12885 | |
| 12886 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 12887 | |
| 12888 | dirmips = (struct mips_elf_link_hash_entry *) dir; |
| 12889 | indmips = (struct mips_elf_link_hash_entry *) ind; |
| 12890 | /* Any absolute non-dynamic relocations against an indirect or weak |
| 12891 | definition will be against the target symbol. */ |
| 12892 | if (indmips->has_static_relocs) |
| 12893 | dirmips->has_static_relocs = TRUE; |
| 12894 | |
| 12895 | if (ind->root.type != bfd_link_hash_indirect) |
| 12896 | return; |
| 12897 | |
| 12898 | dirmips->possibly_dynamic_relocs += indmips->possibly_dynamic_relocs; |
| 12899 | if (indmips->readonly_reloc) |
| 12900 | dirmips->readonly_reloc = TRUE; |
| 12901 | if (indmips->no_fn_stub) |
| 12902 | dirmips->no_fn_stub = TRUE; |
| 12903 | if (indmips->fn_stub) |
| 12904 | { |
| 12905 | dirmips->fn_stub = indmips->fn_stub; |
| 12906 | indmips->fn_stub = NULL; |
| 12907 | } |
| 12908 | if (indmips->need_fn_stub) |
| 12909 | { |
| 12910 | dirmips->need_fn_stub = TRUE; |
| 12911 | indmips->need_fn_stub = FALSE; |
| 12912 | } |
| 12913 | if (indmips->call_stub) |
| 12914 | { |
| 12915 | dirmips->call_stub = indmips->call_stub; |
| 12916 | indmips->call_stub = NULL; |
| 12917 | } |
| 12918 | if (indmips->call_fp_stub) |
| 12919 | { |
| 12920 | dirmips->call_fp_stub = indmips->call_fp_stub; |
| 12921 | indmips->call_fp_stub = NULL; |
| 12922 | } |
| 12923 | if (indmips->global_got_area < dirmips->global_got_area) |
| 12924 | dirmips->global_got_area = indmips->global_got_area; |
| 12925 | if (indmips->global_got_area < GGA_NONE) |
| 12926 | indmips->global_got_area = GGA_NONE; |
| 12927 | if (indmips->has_nonpic_branches) |
| 12928 | dirmips->has_nonpic_branches = TRUE; |
| 12929 | } |
| 12930 | |
| 12931 | /* Take care of the special `__gnu_absolute_zero' symbol and ignore attempts |
| 12932 | to hide it. It has to remain global (it will also be protected) so as to |
| 12933 | be assigned a global GOT entry, which will then remain unchanged at load |
| 12934 | time. */ |
| 12935 | |
| 12936 | void |
| 12937 | _bfd_mips_elf_hide_symbol (struct bfd_link_info *info, |
| 12938 | struct elf_link_hash_entry *entry, |
| 12939 | bfd_boolean force_local) |
| 12940 | { |
| 12941 | struct mips_elf_link_hash_table *htab; |
| 12942 | |
| 12943 | htab = mips_elf_hash_table (info); |
| 12944 | BFD_ASSERT (htab != NULL); |
| 12945 | if (htab->use_absolute_zero |
| 12946 | && strcmp (entry->root.root.string, "__gnu_absolute_zero") == 0) |
| 12947 | return; |
| 12948 | |
| 12949 | _bfd_elf_link_hash_hide_symbol (info, entry, force_local); |
| 12950 | } |
| 12951 | \f |
| 12952 | #define PDR_SIZE 32 |
| 12953 | |
| 12954 | bfd_boolean |
| 12955 | _bfd_mips_elf_discard_info (bfd *abfd, struct elf_reloc_cookie *cookie, |
| 12956 | struct bfd_link_info *info) |
| 12957 | { |
| 12958 | asection *o; |
| 12959 | bfd_boolean ret = FALSE; |
| 12960 | unsigned char *tdata; |
| 12961 | size_t i, skip; |
| 12962 | |
| 12963 | o = bfd_get_section_by_name (abfd, ".pdr"); |
| 12964 | if (! o) |
| 12965 | return FALSE; |
| 12966 | if (o->size == 0) |
| 12967 | return FALSE; |
| 12968 | if (o->size % PDR_SIZE != 0) |
| 12969 | return FALSE; |
| 12970 | if (o->output_section != NULL |
| 12971 | && bfd_is_abs_section (o->output_section)) |
| 12972 | return FALSE; |
| 12973 | |
| 12974 | tdata = bfd_zmalloc (o->size / PDR_SIZE); |
| 12975 | if (! tdata) |
| 12976 | return FALSE; |
| 12977 | |
| 12978 | cookie->rels = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, |
| 12979 | info->keep_memory); |
| 12980 | if (!cookie->rels) |
| 12981 | { |
| 12982 | free (tdata); |
| 12983 | return FALSE; |
| 12984 | } |
| 12985 | |
| 12986 | cookie->rel = cookie->rels; |
| 12987 | cookie->relend = cookie->rels + o->reloc_count; |
| 12988 | |
| 12989 | for (i = 0, skip = 0; i < o->size / PDR_SIZE; i ++) |
| 12990 | { |
| 12991 | if (bfd_elf_reloc_symbol_deleted_p (i * PDR_SIZE, cookie)) |
| 12992 | { |
| 12993 | tdata[i] = 1; |
| 12994 | skip ++; |
| 12995 | } |
| 12996 | } |
| 12997 | |
| 12998 | if (skip != 0) |
| 12999 | { |
| 13000 | mips_elf_section_data (o)->u.tdata = tdata; |
| 13001 | if (o->rawsize == 0) |
| 13002 | o->rawsize = o->size; |
| 13003 | o->size -= skip * PDR_SIZE; |
| 13004 | ret = TRUE; |
| 13005 | } |
| 13006 | else |
| 13007 | free (tdata); |
| 13008 | |
| 13009 | if (! info->keep_memory) |
| 13010 | free (cookie->rels); |
| 13011 | |
| 13012 | return ret; |
| 13013 | } |
| 13014 | |
| 13015 | bfd_boolean |
| 13016 | _bfd_mips_elf_ignore_discarded_relocs (asection *sec) |
| 13017 | { |
| 13018 | if (strcmp (sec->name, ".pdr") == 0) |
| 13019 | return TRUE; |
| 13020 | return FALSE; |
| 13021 | } |
| 13022 | |
| 13023 | bfd_boolean |
| 13024 | _bfd_mips_elf_write_section (bfd *output_bfd, |
| 13025 | struct bfd_link_info *link_info ATTRIBUTE_UNUSED, |
| 13026 | asection *sec, bfd_byte *contents) |
| 13027 | { |
| 13028 | bfd_byte *to, *from, *end; |
| 13029 | int i; |
| 13030 | |
| 13031 | if (strcmp (sec->name, ".pdr") != 0) |
| 13032 | return FALSE; |
| 13033 | |
| 13034 | if (mips_elf_section_data (sec)->u.tdata == NULL) |
| 13035 | return FALSE; |
| 13036 | |
| 13037 | to = contents; |
| 13038 | end = contents + sec->size; |
| 13039 | for (from = contents, i = 0; |
| 13040 | from < end; |
| 13041 | from += PDR_SIZE, i++) |
| 13042 | { |
| 13043 | if ((mips_elf_section_data (sec)->u.tdata)[i] == 1) |
| 13044 | continue; |
| 13045 | if (to != from) |
| 13046 | memcpy (to, from, PDR_SIZE); |
| 13047 | to += PDR_SIZE; |
| 13048 | } |
| 13049 | bfd_set_section_contents (output_bfd, sec->output_section, contents, |
| 13050 | sec->output_offset, sec->size); |
| 13051 | return TRUE; |
| 13052 | } |
| 13053 | \f |
| 13054 | /* microMIPS code retains local labels for linker relaxation. Omit them |
| 13055 | from output by default for clarity. */ |
| 13056 | |
| 13057 | bfd_boolean |
| 13058 | _bfd_mips_elf_is_target_special_symbol (bfd *abfd, asymbol *sym) |
| 13059 | { |
| 13060 | return _bfd_elf_is_local_label_name (abfd, sym->name); |
| 13061 | } |
| 13062 | |
| 13063 | /* MIPS ELF uses a special find_nearest_line routine in order the |
| 13064 | handle the ECOFF debugging information. */ |
| 13065 | |
| 13066 | struct mips_elf_find_line |
| 13067 | { |
| 13068 | struct ecoff_debug_info d; |
| 13069 | struct ecoff_find_line i; |
| 13070 | }; |
| 13071 | |
| 13072 | bfd_boolean |
| 13073 | _bfd_mips_elf_find_nearest_line (bfd *abfd, asymbol **symbols, |
| 13074 | asection *section, bfd_vma offset, |
| 13075 | const char **filename_ptr, |
| 13076 | const char **functionname_ptr, |
| 13077 | unsigned int *line_ptr, |
| 13078 | unsigned int *discriminator_ptr) |
| 13079 | { |
| 13080 | asection *msec; |
| 13081 | |
| 13082 | if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, |
| 13083 | filename_ptr, functionname_ptr, |
| 13084 | line_ptr, discriminator_ptr, |
| 13085 | dwarf_debug_sections, |
| 13086 | &elf_tdata (abfd)->dwarf2_find_line_info) |
| 13087 | == 1) |
| 13088 | return TRUE; |
| 13089 | |
| 13090 | if (_bfd_dwarf1_find_nearest_line (abfd, symbols, section, offset, |
| 13091 | filename_ptr, functionname_ptr, |
| 13092 | line_ptr)) |
| 13093 | { |
| 13094 | if (!*functionname_ptr) |
| 13095 | _bfd_elf_find_function (abfd, symbols, section, offset, |
| 13096 | *filename_ptr ? NULL : filename_ptr, |
| 13097 | functionname_ptr); |
| 13098 | return TRUE; |
| 13099 | } |
| 13100 | |
| 13101 | msec = bfd_get_section_by_name (abfd, ".mdebug"); |
| 13102 | if (msec != NULL) |
| 13103 | { |
| 13104 | flagword origflags; |
| 13105 | struct mips_elf_find_line *fi; |
| 13106 | const struct ecoff_debug_swap * const swap = |
| 13107 | get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 13108 | |
| 13109 | /* If we are called during a link, mips_elf_final_link may have |
| 13110 | cleared the SEC_HAS_CONTENTS field. We force it back on here |
| 13111 | if appropriate (which it normally will be). */ |
| 13112 | origflags = msec->flags; |
| 13113 | if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS) |
| 13114 | msec->flags |= SEC_HAS_CONTENTS; |
| 13115 | |
| 13116 | fi = mips_elf_tdata (abfd)->find_line_info; |
| 13117 | if (fi == NULL) |
| 13118 | { |
| 13119 | bfd_size_type external_fdr_size; |
| 13120 | char *fraw_src; |
| 13121 | char *fraw_end; |
| 13122 | struct fdr *fdr_ptr; |
| 13123 | bfd_size_type amt = sizeof (struct mips_elf_find_line); |
| 13124 | |
| 13125 | fi = bfd_zalloc (abfd, amt); |
| 13126 | if (fi == NULL) |
| 13127 | { |
| 13128 | msec->flags = origflags; |
| 13129 | return FALSE; |
| 13130 | } |
| 13131 | |
| 13132 | if (! _bfd_mips_elf_read_ecoff_info (abfd, msec, &fi->d)) |
| 13133 | { |
| 13134 | msec->flags = origflags; |
| 13135 | return FALSE; |
| 13136 | } |
| 13137 | |
| 13138 | /* Swap in the FDR information. */ |
| 13139 | amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr); |
| 13140 | fi->d.fdr = bfd_alloc (abfd, amt); |
| 13141 | if (fi->d.fdr == NULL) |
| 13142 | { |
| 13143 | msec->flags = origflags; |
| 13144 | return FALSE; |
| 13145 | } |
| 13146 | external_fdr_size = swap->external_fdr_size; |
| 13147 | fdr_ptr = fi->d.fdr; |
| 13148 | fraw_src = (char *) fi->d.external_fdr; |
| 13149 | fraw_end = (fraw_src |
| 13150 | + fi->d.symbolic_header.ifdMax * external_fdr_size); |
| 13151 | for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) |
| 13152 | (*swap->swap_fdr_in) (abfd, fraw_src, fdr_ptr); |
| 13153 | |
| 13154 | mips_elf_tdata (abfd)->find_line_info = fi; |
| 13155 | |
| 13156 | /* Note that we don't bother to ever free this information. |
| 13157 | find_nearest_line is either called all the time, as in |
| 13158 | objdump -l, so the information should be saved, or it is |
| 13159 | rarely called, as in ld error messages, so the memory |
| 13160 | wasted is unimportant. Still, it would probably be a |
| 13161 | good idea for free_cached_info to throw it away. */ |
| 13162 | } |
| 13163 | |
| 13164 | if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, |
| 13165 | &fi->i, filename_ptr, functionname_ptr, |
| 13166 | line_ptr)) |
| 13167 | { |
| 13168 | msec->flags = origflags; |
| 13169 | return TRUE; |
| 13170 | } |
| 13171 | |
| 13172 | msec->flags = origflags; |
| 13173 | } |
| 13174 | |
| 13175 | /* Fall back on the generic ELF find_nearest_line routine. */ |
| 13176 | |
| 13177 | return _bfd_elf_find_nearest_line (abfd, symbols, section, offset, |
| 13178 | filename_ptr, functionname_ptr, |
| 13179 | line_ptr, discriminator_ptr); |
| 13180 | } |
| 13181 | |
| 13182 | bfd_boolean |
| 13183 | _bfd_mips_elf_find_inliner_info (bfd *abfd, |
| 13184 | const char **filename_ptr, |
| 13185 | const char **functionname_ptr, |
| 13186 | unsigned int *line_ptr) |
| 13187 | { |
| 13188 | bfd_boolean found; |
| 13189 | found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr, |
| 13190 | functionname_ptr, line_ptr, |
| 13191 | & elf_tdata (abfd)->dwarf2_find_line_info); |
| 13192 | return found; |
| 13193 | } |
| 13194 | |
| 13195 | \f |
| 13196 | /* When are writing out the .options or .MIPS.options section, |
| 13197 | remember the bytes we are writing out, so that we can install the |
| 13198 | GP value in the section_processing routine. */ |
| 13199 | |
| 13200 | bfd_boolean |
| 13201 | _bfd_mips_elf_set_section_contents (bfd *abfd, sec_ptr section, |
| 13202 | const void *location, |
| 13203 | file_ptr offset, bfd_size_type count) |
| 13204 | { |
| 13205 | if (MIPS_ELF_OPTIONS_SECTION_NAME_P (section->name)) |
| 13206 | { |
| 13207 | bfd_byte *c; |
| 13208 | |
| 13209 | if (elf_section_data (section) == NULL) |
| 13210 | { |
| 13211 | size_t amt = sizeof (struct bfd_elf_section_data); |
| 13212 | section->used_by_bfd = bfd_zalloc (abfd, amt); |
| 13213 | if (elf_section_data (section) == NULL) |
| 13214 | return FALSE; |
| 13215 | } |
| 13216 | c = mips_elf_section_data (section)->u.tdata; |
| 13217 | if (c == NULL) |
| 13218 | { |
| 13219 | c = bfd_zalloc (abfd, section->size); |
| 13220 | if (c == NULL) |
| 13221 | return FALSE; |
| 13222 | mips_elf_section_data (section)->u.tdata = c; |
| 13223 | } |
| 13224 | |
| 13225 | memcpy (c + offset, location, count); |
| 13226 | } |
| 13227 | |
| 13228 | return _bfd_elf_set_section_contents (abfd, section, location, offset, |
| 13229 | count); |
| 13230 | } |
| 13231 | |
| 13232 | /* This is almost identical to bfd_generic_get_... except that some |
| 13233 | MIPS relocations need to be handled specially. Sigh. */ |
| 13234 | |
| 13235 | bfd_byte * |
| 13236 | _bfd_elf_mips_get_relocated_section_contents |
| 13237 | (bfd *abfd, |
| 13238 | struct bfd_link_info *link_info, |
| 13239 | struct bfd_link_order *link_order, |
| 13240 | bfd_byte *data, |
| 13241 | bfd_boolean relocatable, |
| 13242 | asymbol **symbols) |
| 13243 | { |
| 13244 | /* Get enough memory to hold the stuff */ |
| 13245 | bfd *input_bfd = link_order->u.indirect.section->owner; |
| 13246 | asection *input_section = link_order->u.indirect.section; |
| 13247 | bfd_size_type sz; |
| 13248 | |
| 13249 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); |
| 13250 | arelent **reloc_vector = NULL; |
| 13251 | long reloc_count; |
| 13252 | |
| 13253 | if (reloc_size < 0) |
| 13254 | goto error_return; |
| 13255 | |
| 13256 | reloc_vector = bfd_malloc (reloc_size); |
| 13257 | if (reloc_vector == NULL && reloc_size != 0) |
| 13258 | goto error_return; |
| 13259 | |
| 13260 | /* read in the section */ |
| 13261 | sz = input_section->rawsize ? input_section->rawsize : input_section->size; |
| 13262 | if (!bfd_get_section_contents (input_bfd, input_section, data, 0, sz)) |
| 13263 | goto error_return; |
| 13264 | |
| 13265 | reloc_count = bfd_canonicalize_reloc (input_bfd, |
| 13266 | input_section, |
| 13267 | reloc_vector, |
| 13268 | symbols); |
| 13269 | if (reloc_count < 0) |
| 13270 | goto error_return; |
| 13271 | |
| 13272 | if (reloc_count > 0) |
| 13273 | { |
| 13274 | arelent **parent; |
| 13275 | /* for mips */ |
| 13276 | int gp_found; |
| 13277 | bfd_vma gp = 0x12345678; /* initialize just to shut gcc up */ |
| 13278 | |
| 13279 | { |
| 13280 | struct bfd_hash_entry *h; |
| 13281 | struct bfd_link_hash_entry *lh; |
| 13282 | /* Skip all this stuff if we aren't mixing formats. */ |
| 13283 | if (abfd && input_bfd |
| 13284 | && abfd->xvec == input_bfd->xvec) |
| 13285 | lh = 0; |
| 13286 | else |
| 13287 | { |
| 13288 | h = bfd_hash_lookup (&link_info->hash->table, "_gp", FALSE, FALSE); |
| 13289 | lh = (struct bfd_link_hash_entry *) h; |
| 13290 | } |
| 13291 | lookup: |
| 13292 | if (lh) |
| 13293 | { |
| 13294 | switch (lh->type) |
| 13295 | { |
| 13296 | case bfd_link_hash_undefined: |
| 13297 | case bfd_link_hash_undefweak: |
| 13298 | case bfd_link_hash_common: |
| 13299 | gp_found = 0; |
| 13300 | break; |
| 13301 | case bfd_link_hash_defined: |
| 13302 | case bfd_link_hash_defweak: |
| 13303 | gp_found = 1; |
| 13304 | gp = lh->u.def.value; |
| 13305 | break; |
| 13306 | case bfd_link_hash_indirect: |
| 13307 | case bfd_link_hash_warning: |
| 13308 | lh = lh->u.i.link; |
| 13309 | /* @@FIXME ignoring warning for now */ |
| 13310 | goto lookup; |
| 13311 | case bfd_link_hash_new: |
| 13312 | default: |
| 13313 | abort (); |
| 13314 | } |
| 13315 | } |
| 13316 | else |
| 13317 | gp_found = 0; |
| 13318 | } |
| 13319 | /* end mips */ |
| 13320 | for (parent = reloc_vector; *parent != NULL; parent++) |
| 13321 | { |
| 13322 | char *error_message = NULL; |
| 13323 | bfd_reloc_status_type r; |
| 13324 | |
| 13325 | /* Specific to MIPS: Deal with relocation types that require |
| 13326 | knowing the gp of the output bfd. */ |
| 13327 | asymbol *sym = *(*parent)->sym_ptr_ptr; |
| 13328 | |
| 13329 | /* If we've managed to find the gp and have a special |
| 13330 | function for the relocation then go ahead, else default |
| 13331 | to the generic handling. */ |
| 13332 | if (gp_found |
| 13333 | && (*parent)->howto->special_function |
| 13334 | == _bfd_mips_elf32_gprel16_reloc) |
| 13335 | r = _bfd_mips_elf_gprel16_with_gp (input_bfd, sym, *parent, |
| 13336 | input_section, relocatable, |
| 13337 | data, gp); |
| 13338 | else |
| 13339 | r = bfd_perform_relocation (input_bfd, *parent, data, |
| 13340 | input_section, |
| 13341 | relocatable ? abfd : NULL, |
| 13342 | &error_message); |
| 13343 | |
| 13344 | if (relocatable) |
| 13345 | { |
| 13346 | asection *os = input_section->output_section; |
| 13347 | |
| 13348 | /* A partial link, so keep the relocs */ |
| 13349 | os->orelocation[os->reloc_count] = *parent; |
| 13350 | os->reloc_count++; |
| 13351 | } |
| 13352 | |
| 13353 | if (r != bfd_reloc_ok) |
| 13354 | { |
| 13355 | switch (r) |
| 13356 | { |
| 13357 | case bfd_reloc_undefined: |
| 13358 | (*link_info->callbacks->undefined_symbol) |
| 13359 | (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), |
| 13360 | input_bfd, input_section, (*parent)->address, TRUE); |
| 13361 | break; |
| 13362 | case bfd_reloc_dangerous: |
| 13363 | BFD_ASSERT (error_message != NULL); |
| 13364 | (*link_info->callbacks->reloc_dangerous) |
| 13365 | (link_info, error_message, |
| 13366 | input_bfd, input_section, (*parent)->address); |
| 13367 | break; |
| 13368 | case bfd_reloc_overflow: |
| 13369 | (*link_info->callbacks->reloc_overflow) |
| 13370 | (link_info, NULL, |
| 13371 | bfd_asymbol_name (*(*parent)->sym_ptr_ptr), |
| 13372 | (*parent)->howto->name, (*parent)->addend, |
| 13373 | input_bfd, input_section, (*parent)->address); |
| 13374 | break; |
| 13375 | case bfd_reloc_outofrange: |
| 13376 | default: |
| 13377 | abort (); |
| 13378 | break; |
| 13379 | } |
| 13380 | |
| 13381 | } |
| 13382 | } |
| 13383 | } |
| 13384 | if (reloc_vector != NULL) |
| 13385 | free (reloc_vector); |
| 13386 | return data; |
| 13387 | |
| 13388 | error_return: |
| 13389 | if (reloc_vector != NULL) |
| 13390 | free (reloc_vector); |
| 13391 | return NULL; |
| 13392 | } |
| 13393 | \f |
| 13394 | static bfd_boolean |
| 13395 | mips_elf_relax_delete_bytes (bfd *abfd, |
| 13396 | asection *sec, bfd_vma addr, int count) |
| 13397 | { |
| 13398 | Elf_Internal_Shdr *symtab_hdr; |
| 13399 | unsigned int sec_shndx; |
| 13400 | bfd_byte *contents; |
| 13401 | Elf_Internal_Rela *irel, *irelend; |
| 13402 | Elf_Internal_Sym *isym; |
| 13403 | Elf_Internal_Sym *isymend; |
| 13404 | struct elf_link_hash_entry **sym_hashes; |
| 13405 | struct elf_link_hash_entry **end_hashes; |
| 13406 | struct elf_link_hash_entry **start_hashes; |
| 13407 | unsigned int symcount; |
| 13408 | |
| 13409 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 13410 | contents = elf_section_data (sec)->this_hdr.contents; |
| 13411 | |
| 13412 | irel = elf_section_data (sec)->relocs; |
| 13413 | irelend = irel + sec->reloc_count; |
| 13414 | |
| 13415 | /* Actually delete the bytes. */ |
| 13416 | memmove (contents + addr, contents + addr + count, |
| 13417 | (size_t) (sec->size - addr - count)); |
| 13418 | sec->size -= count; |
| 13419 | |
| 13420 | /* Adjust all the relocs. */ |
| 13421 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| 13422 | { |
| 13423 | /* Get the new reloc address. */ |
| 13424 | if (irel->r_offset > addr) |
| 13425 | irel->r_offset -= count; |
| 13426 | } |
| 13427 | |
| 13428 | BFD_ASSERT (addr % 2 == 0); |
| 13429 | BFD_ASSERT (count % 2 == 0); |
| 13430 | |
| 13431 | /* Adjust the local symbols defined in this section. */ |
| 13432 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 13433 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 13434 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
| 13435 | if (isym->st_shndx == sec_shndx && isym->st_value > addr) |
| 13436 | isym->st_value -= count; |
| 13437 | |
| 13438 | /* Now adjust the global symbols defined in this section. */ |
| 13439 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 13440 | - symtab_hdr->sh_info); |
| 13441 | sym_hashes = start_hashes = elf_sym_hashes (abfd); |
| 13442 | end_hashes = sym_hashes + symcount; |
| 13443 | |
| 13444 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 13445 | { |
| 13446 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 13447 | |
| 13448 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 13449 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 13450 | && sym_hash->root.u.def.section == sec) |
| 13451 | { |
| 13452 | bfd_vma value = sym_hash->root.u.def.value; |
| 13453 | |
| 13454 | if (ELF_ST_IS_MICROMIPS (sym_hash->other)) |
| 13455 | value &= MINUS_TWO; |
| 13456 | if (value > addr) |
| 13457 | sym_hash->root.u.def.value -= count; |
| 13458 | } |
| 13459 | } |
| 13460 | |
| 13461 | return TRUE; |
| 13462 | } |
| 13463 | |
| 13464 | |
| 13465 | /* Opcodes needed for microMIPS relaxation as found in |
| 13466 | opcodes/micromips-opc.c. */ |
| 13467 | |
| 13468 | struct opcode_descriptor { |
| 13469 | unsigned long match; |
| 13470 | unsigned long mask; |
| 13471 | }; |
| 13472 | |
| 13473 | /* The $ra register aka $31. */ |
| 13474 | |
| 13475 | #define RA 31 |
| 13476 | |
| 13477 | /* 32-bit instruction format register fields. */ |
| 13478 | |
| 13479 | #define OP32_SREG(opcode) (((opcode) >> 16) & 0x1f) |
| 13480 | #define OP32_TREG(opcode) (((opcode) >> 21) & 0x1f) |
| 13481 | |
| 13482 | /* Check if a 5-bit register index can be abbreviated to 3 bits. */ |
| 13483 | |
| 13484 | #define OP16_VALID_REG(r) \ |
| 13485 | ((2 <= (r) && (r) <= 7) || (16 <= (r) && (r) <= 17)) |
| 13486 | |
| 13487 | |
| 13488 | /* 32-bit and 16-bit branches. */ |
| 13489 | |
| 13490 | static const struct opcode_descriptor b_insns_32[] = { |
| 13491 | { /* "b", "p", */ 0x40400000, 0xffff0000 }, /* bgez 0 */ |
| 13492 | { /* "b", "p", */ 0x94000000, 0xffff0000 }, /* beq 0, 0 */ |
| 13493 | { 0, 0 } /* End marker for find_match(). */ |
| 13494 | }; |
| 13495 | |
| 13496 | static const struct opcode_descriptor bc_insn_32 = |
| 13497 | { /* "bc(1|2)(ft)", "N,p", */ 0x42800000, 0xfec30000 }; |
| 13498 | |
| 13499 | static const struct opcode_descriptor bz_insn_32 = |
| 13500 | { /* "b(g|l)(e|t)z", "s,p", */ 0x40000000, 0xff200000 }; |
| 13501 | |
| 13502 | static const struct opcode_descriptor bzal_insn_32 = |
| 13503 | { /* "b(ge|lt)zal", "s,p", */ 0x40200000, 0xffa00000 }; |
| 13504 | |
| 13505 | static const struct opcode_descriptor beq_insn_32 = |
| 13506 | { /* "b(eq|ne)", "s,t,p", */ 0x94000000, 0xdc000000 }; |
| 13507 | |
| 13508 | static const struct opcode_descriptor b_insn_16 = |
| 13509 | { /* "b", "mD", */ 0xcc00, 0xfc00 }; |
| 13510 | |
| 13511 | static const struct opcode_descriptor bz_insn_16 = |
| 13512 | { /* "b(eq|ne)z", "md,mE", */ 0x8c00, 0xdc00 }; |
| 13513 | |
| 13514 | |
| 13515 | /* 32-bit and 16-bit branch EQ and NE zero. */ |
| 13516 | |
| 13517 | /* NOTE: All opcode tables have BEQ/BNE in the same order: first the |
| 13518 | eq and second the ne. This convention is used when replacing a |
| 13519 | 32-bit BEQ/BNE with the 16-bit version. */ |
| 13520 | |
| 13521 | #define BZC32_REG_FIELD(r) (((r) & 0x1f) << 16) |
| 13522 | |
| 13523 | static const struct opcode_descriptor bz_rs_insns_32[] = { |
| 13524 | { /* "beqz", "s,p", */ 0x94000000, 0xffe00000 }, |
| 13525 | { /* "bnez", "s,p", */ 0xb4000000, 0xffe00000 }, |
| 13526 | { 0, 0 } /* End marker for find_match(). */ |
| 13527 | }; |
| 13528 | |
| 13529 | static const struct opcode_descriptor bz_rt_insns_32[] = { |
| 13530 | { /* "beqz", "t,p", */ 0x94000000, 0xfc01f000 }, |
| 13531 | { /* "bnez", "t,p", */ 0xb4000000, 0xfc01f000 }, |
| 13532 | { 0, 0 } /* End marker for find_match(). */ |
| 13533 | }; |
| 13534 | |
| 13535 | static const struct opcode_descriptor bzc_insns_32[] = { |
| 13536 | { /* "beqzc", "s,p", */ 0x40e00000, 0xffe00000 }, |
| 13537 | { /* "bnezc", "s,p", */ 0x40a00000, 0xffe00000 }, |
| 13538 | { 0, 0 } /* End marker for find_match(). */ |
| 13539 | }; |
| 13540 | |
| 13541 | static const struct opcode_descriptor bz_insns_16[] = { |
| 13542 | { /* "beqz", "md,mE", */ 0x8c00, 0xfc00 }, |
| 13543 | { /* "bnez", "md,mE", */ 0xac00, 0xfc00 }, |
| 13544 | { 0, 0 } /* End marker for find_match(). */ |
| 13545 | }; |
| 13546 | |
| 13547 | /* Switch between a 5-bit register index and its 3-bit shorthand. */ |
| 13548 | |
| 13549 | #define BZ16_REG(opcode) ((((((opcode) >> 7) & 7) + 0x1e) & 0xf) + 2) |
| 13550 | #define BZ16_REG_FIELD(r) (((r) & 7) << 7) |
| 13551 | |
| 13552 | |
| 13553 | /* 32-bit instructions with a delay slot. */ |
| 13554 | |
| 13555 | static const struct opcode_descriptor jal_insn_32_bd16 = |
| 13556 | { /* "jals", "a", */ 0x74000000, 0xfc000000 }; |
| 13557 | |
| 13558 | static const struct opcode_descriptor jal_insn_32_bd32 = |
| 13559 | { /* "jal", "a", */ 0xf4000000, 0xfc000000 }; |
| 13560 | |
| 13561 | static const struct opcode_descriptor jal_x_insn_32_bd32 = |
| 13562 | { /* "jal[x]", "a", */ 0xf0000000, 0xf8000000 }; |
| 13563 | |
| 13564 | static const struct opcode_descriptor j_insn_32 = |
| 13565 | { /* "j", "a", */ 0xd4000000, 0xfc000000 }; |
| 13566 | |
| 13567 | static const struct opcode_descriptor jalr_insn_32 = |
| 13568 | { /* "jalr[.hb]", "t,s", */ 0x00000f3c, 0xfc00efff }; |
| 13569 | |
| 13570 | /* This table can be compacted, because no opcode replacement is made. */ |
| 13571 | |
| 13572 | static const struct opcode_descriptor ds_insns_32_bd16[] = { |
| 13573 | { /* "jals", "a", */ 0x74000000, 0xfc000000 }, |
| 13574 | |
| 13575 | { /* "jalrs[.hb]", "t,s", */ 0x00004f3c, 0xfc00efff }, |
| 13576 | { /* "b(ge|lt)zals", "s,p", */ 0x42200000, 0xffa00000 }, |
| 13577 | |
| 13578 | { /* "b(g|l)(e|t)z", "s,p", */ 0x40000000, 0xff200000 }, |
| 13579 | { /* "b(eq|ne)", "s,t,p", */ 0x94000000, 0xdc000000 }, |
| 13580 | { /* "j", "a", */ 0xd4000000, 0xfc000000 }, |
| 13581 | { 0, 0 } /* End marker for find_match(). */ |
| 13582 | }; |
| 13583 | |
| 13584 | /* This table can be compacted, because no opcode replacement is made. */ |
| 13585 | |
| 13586 | static const struct opcode_descriptor ds_insns_32_bd32[] = { |
| 13587 | { /* "jal[x]", "a", */ 0xf0000000, 0xf8000000 }, |
| 13588 | |
| 13589 | { /* "jalr[.hb]", "t,s", */ 0x00000f3c, 0xfc00efff }, |
| 13590 | { /* "b(ge|lt)zal", "s,p", */ 0x40200000, 0xffa00000 }, |
| 13591 | { 0, 0 } /* End marker for find_match(). */ |
| 13592 | }; |
| 13593 | |
| 13594 | |
| 13595 | /* 16-bit instructions with a delay slot. */ |
| 13596 | |
| 13597 | static const struct opcode_descriptor jalr_insn_16_bd16 = |
| 13598 | { /* "jalrs", "my,mj", */ 0x45e0, 0xffe0 }; |
| 13599 | |
| 13600 | static const struct opcode_descriptor jalr_insn_16_bd32 = |
| 13601 | { /* "jalr", "my,mj", */ 0x45c0, 0xffe0 }; |
| 13602 | |
| 13603 | static const struct opcode_descriptor jr_insn_16 = |
| 13604 | { /* "jr", "mj", */ 0x4580, 0xffe0 }; |
| 13605 | |
| 13606 | #define JR16_REG(opcode) ((opcode) & 0x1f) |
| 13607 | |
| 13608 | /* This table can be compacted, because no opcode replacement is made. */ |
| 13609 | |
| 13610 | static const struct opcode_descriptor ds_insns_16_bd16[] = { |
| 13611 | { /* "jalrs", "my,mj", */ 0x45e0, 0xffe0 }, |
| 13612 | |
| 13613 | { /* "b", "mD", */ 0xcc00, 0xfc00 }, |
| 13614 | { /* "b(eq|ne)z", "md,mE", */ 0x8c00, 0xdc00 }, |
| 13615 | { /* "jr", "mj", */ 0x4580, 0xffe0 }, |
| 13616 | { 0, 0 } /* End marker for find_match(). */ |
| 13617 | }; |
| 13618 | |
| 13619 | |
| 13620 | /* LUI instruction. */ |
| 13621 | |
| 13622 | static const struct opcode_descriptor lui_insn = |
| 13623 | { /* "lui", "s,u", */ 0x41a00000, 0xffe00000 }; |
| 13624 | |
| 13625 | |
| 13626 | /* ADDIU instruction. */ |
| 13627 | |
| 13628 | static const struct opcode_descriptor addiu_insn = |
| 13629 | { /* "addiu", "t,r,j", */ 0x30000000, 0xfc000000 }; |
| 13630 | |
| 13631 | static const struct opcode_descriptor addiupc_insn = |
| 13632 | { /* "addiu", "mb,$pc,mQ", */ 0x78000000, 0xfc000000 }; |
| 13633 | |
| 13634 | #define ADDIUPC_REG_FIELD(r) \ |
| 13635 | (((2 <= (r) && (r) <= 7) ? (r) : ((r) - 16)) << 23) |
| 13636 | |
| 13637 | |
| 13638 | /* Relaxable instructions in a JAL delay slot: MOVE. */ |
| 13639 | |
| 13640 | /* The 16-bit move has rd in 9:5 and rs in 4:0. The 32-bit moves |
| 13641 | (ADDU, OR) have rd in 15:11 and rs in 10:16. */ |
| 13642 | #define MOVE32_RD(opcode) (((opcode) >> 11) & 0x1f) |
| 13643 | #define MOVE32_RS(opcode) (((opcode) >> 16) & 0x1f) |
| 13644 | |
| 13645 | #define MOVE16_RD_FIELD(r) (((r) & 0x1f) << 5) |
| 13646 | #define MOVE16_RS_FIELD(r) (((r) & 0x1f) ) |
| 13647 | |
| 13648 | static const struct opcode_descriptor move_insns_32[] = { |
| 13649 | { /* "move", "d,s", */ 0x00000290, 0xffe007ff }, /* or d,s,$0 */ |
| 13650 | { /* "move", "d,s", */ 0x00000150, 0xffe007ff }, /* addu d,s,$0 */ |
| 13651 | { 0, 0 } /* End marker for find_match(). */ |
| 13652 | }; |
| 13653 | |
| 13654 | static const struct opcode_descriptor move_insn_16 = |
| 13655 | { /* "move", "mp,mj", */ 0x0c00, 0xfc00 }; |
| 13656 | |
| 13657 | |
| 13658 | /* NOP instructions. */ |
| 13659 | |
| 13660 | static const struct opcode_descriptor nop_insn_32 = |
| 13661 | { /* "nop", "", */ 0x00000000, 0xffffffff }; |
| 13662 | |
| 13663 | static const struct opcode_descriptor nop_insn_16 = |
| 13664 | { /* "nop", "", */ 0x0c00, 0xffff }; |
| 13665 | |
| 13666 | |
| 13667 | /* Instruction match support. */ |
| 13668 | |
| 13669 | #define MATCH(opcode, insn) ((opcode & insn.mask) == insn.match) |
| 13670 | |
| 13671 | static int |
| 13672 | find_match (unsigned long opcode, const struct opcode_descriptor insn[]) |
| 13673 | { |
| 13674 | unsigned long indx; |
| 13675 | |
| 13676 | for (indx = 0; insn[indx].mask != 0; indx++) |
| 13677 | if (MATCH (opcode, insn[indx])) |
| 13678 | return indx; |
| 13679 | |
| 13680 | return -1; |
| 13681 | } |
| 13682 | |
| 13683 | |
| 13684 | /* Branch and delay slot decoding support. */ |
| 13685 | |
| 13686 | /* If PTR points to what *might* be a 16-bit branch or jump, then |
| 13687 | return the minimum length of its delay slot, otherwise return 0. |
| 13688 | Non-zero results are not definitive as we might be checking against |
| 13689 | the second half of another instruction. */ |
| 13690 | |
| 13691 | static int |
| 13692 | check_br16_dslot (bfd *abfd, bfd_byte *ptr) |
| 13693 | { |
| 13694 | unsigned long opcode; |
| 13695 | int bdsize; |
| 13696 | |
| 13697 | opcode = bfd_get_16 (abfd, ptr); |
| 13698 | if (MATCH (opcode, jalr_insn_16_bd32) != 0) |
| 13699 | /* 16-bit branch/jump with a 32-bit delay slot. */ |
| 13700 | bdsize = 4; |
| 13701 | else if (MATCH (opcode, jalr_insn_16_bd16) != 0 |
| 13702 | || find_match (opcode, ds_insns_16_bd16) >= 0) |
| 13703 | /* 16-bit branch/jump with a 16-bit delay slot. */ |
| 13704 | bdsize = 2; |
| 13705 | else |
| 13706 | /* No delay slot. */ |
| 13707 | bdsize = 0; |
| 13708 | |
| 13709 | return bdsize; |
| 13710 | } |
| 13711 | |
| 13712 | /* If PTR points to what *might* be a 32-bit branch or jump, then |
| 13713 | return the minimum length of its delay slot, otherwise return 0. |
| 13714 | Non-zero results are not definitive as we might be checking against |
| 13715 | the second half of another instruction. */ |
| 13716 | |
| 13717 | static int |
| 13718 | check_br32_dslot (bfd *abfd, bfd_byte *ptr) |
| 13719 | { |
| 13720 | unsigned long opcode; |
| 13721 | int bdsize; |
| 13722 | |
| 13723 | opcode = bfd_get_micromips_32 (abfd, ptr); |
| 13724 | if (find_match (opcode, ds_insns_32_bd32) >= 0) |
| 13725 | /* 32-bit branch/jump with a 32-bit delay slot. */ |
| 13726 | bdsize = 4; |
| 13727 | else if (find_match (opcode, ds_insns_32_bd16) >= 0) |
| 13728 | /* 32-bit branch/jump with a 16-bit delay slot. */ |
| 13729 | bdsize = 2; |
| 13730 | else |
| 13731 | /* No delay slot. */ |
| 13732 | bdsize = 0; |
| 13733 | |
| 13734 | return bdsize; |
| 13735 | } |
| 13736 | |
| 13737 | /* If PTR points to a 16-bit branch or jump with a 32-bit delay slot |
| 13738 | that doesn't fiddle with REG, then return TRUE, otherwise FALSE. */ |
| 13739 | |
| 13740 | static bfd_boolean |
| 13741 | check_br16 (bfd *abfd, bfd_byte *ptr, unsigned long reg) |
| 13742 | { |
| 13743 | unsigned long opcode; |
| 13744 | |
| 13745 | opcode = bfd_get_16 (abfd, ptr); |
| 13746 | if (MATCH (opcode, b_insn_16) |
| 13747 | /* B16 */ |
| 13748 | || (MATCH (opcode, jr_insn_16) && reg != JR16_REG (opcode)) |
| 13749 | /* JR16 */ |
| 13750 | || (MATCH (opcode, bz_insn_16) && reg != BZ16_REG (opcode)) |
| 13751 | /* BEQZ16, BNEZ16 */ |
| 13752 | || (MATCH (opcode, jalr_insn_16_bd32) |
| 13753 | /* JALR16 */ |
| 13754 | && reg != JR16_REG (opcode) && reg != RA)) |
| 13755 | return TRUE; |
| 13756 | |
| 13757 | return FALSE; |
| 13758 | } |
| 13759 | |
| 13760 | /* If PTR points to a 32-bit branch or jump that doesn't fiddle with REG, |
| 13761 | then return TRUE, otherwise FALSE. */ |
| 13762 | |
| 13763 | static bfd_boolean |
| 13764 | check_br32 (bfd *abfd, bfd_byte *ptr, unsigned long reg) |
| 13765 | { |
| 13766 | unsigned long opcode; |
| 13767 | |
| 13768 | opcode = bfd_get_micromips_32 (abfd, ptr); |
| 13769 | if (MATCH (opcode, j_insn_32) |
| 13770 | /* J */ |
| 13771 | || MATCH (opcode, bc_insn_32) |
| 13772 | /* BC1F, BC1T, BC2F, BC2T */ |
| 13773 | || (MATCH (opcode, jal_x_insn_32_bd32) && reg != RA) |
| 13774 | /* JAL, JALX */ |
| 13775 | || (MATCH (opcode, bz_insn_32) && reg != OP32_SREG (opcode)) |
| 13776 | /* BGEZ, BGTZ, BLEZ, BLTZ */ |
| 13777 | || (MATCH (opcode, bzal_insn_32) |
| 13778 | /* BGEZAL, BLTZAL */ |
| 13779 | && reg != OP32_SREG (opcode) && reg != RA) |
| 13780 | || ((MATCH (opcode, jalr_insn_32) || MATCH (opcode, beq_insn_32)) |
| 13781 | /* JALR, JALR.HB, BEQ, BNE */ |
| 13782 | && reg != OP32_SREG (opcode) && reg != OP32_TREG (opcode))) |
| 13783 | return TRUE; |
| 13784 | |
| 13785 | return FALSE; |
| 13786 | } |
| 13787 | |
| 13788 | /* If the instruction encoding at PTR and relocations [INTERNAL_RELOCS, |
| 13789 | IRELEND) at OFFSET indicate that there must be a compact branch there, |
| 13790 | then return TRUE, otherwise FALSE. */ |
| 13791 | |
| 13792 | static bfd_boolean |
| 13793 | check_relocated_bzc (bfd *abfd, const bfd_byte *ptr, bfd_vma offset, |
| 13794 | const Elf_Internal_Rela *internal_relocs, |
| 13795 | const Elf_Internal_Rela *irelend) |
| 13796 | { |
| 13797 | const Elf_Internal_Rela *irel; |
| 13798 | unsigned long opcode; |
| 13799 | |
| 13800 | opcode = bfd_get_micromips_32 (abfd, ptr); |
| 13801 | if (find_match (opcode, bzc_insns_32) < 0) |
| 13802 | return FALSE; |
| 13803 | |
| 13804 | for (irel = internal_relocs; irel < irelend; irel++) |
| 13805 | if (irel->r_offset == offset |
| 13806 | && ELF32_R_TYPE (irel->r_info) == R_MICROMIPS_PC16_S1) |
| 13807 | return TRUE; |
| 13808 | |
| 13809 | return FALSE; |
| 13810 | } |
| 13811 | |
| 13812 | /* Bitsize checking. */ |
| 13813 | #define IS_BITSIZE(val, N) \ |
| 13814 | (((((val) & ((1ULL << (N)) - 1)) ^ (1ULL << ((N) - 1))) \ |
| 13815 | - (1ULL << ((N) - 1))) == (val)) |
| 13816 | |
| 13817 | \f |
| 13818 | bfd_boolean |
| 13819 | _bfd_mips_elf_relax_section (bfd *abfd, asection *sec, |
| 13820 | struct bfd_link_info *link_info, |
| 13821 | bfd_boolean *again) |
| 13822 | { |
| 13823 | bfd_boolean insn32 = mips_elf_hash_table (link_info)->insn32; |
| 13824 | Elf_Internal_Shdr *symtab_hdr; |
| 13825 | Elf_Internal_Rela *internal_relocs; |
| 13826 | Elf_Internal_Rela *irel, *irelend; |
| 13827 | bfd_byte *contents = NULL; |
| 13828 | Elf_Internal_Sym *isymbuf = NULL; |
| 13829 | |
| 13830 | /* Assume nothing changes. */ |
| 13831 | *again = FALSE; |
| 13832 | |
| 13833 | /* We don't have to do anything for a relocatable link, if |
| 13834 | this section does not have relocs, or if this is not a |
| 13835 | code section. */ |
| 13836 | |
| 13837 | if (bfd_link_relocatable (link_info) |
| 13838 | || (sec->flags & SEC_RELOC) == 0 |
| 13839 | || sec->reloc_count == 0 |
| 13840 | || (sec->flags & SEC_CODE) == 0) |
| 13841 | return TRUE; |
| 13842 | |
| 13843 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 13844 | |
| 13845 | /* Get a copy of the native relocations. */ |
| 13846 | internal_relocs = (_bfd_elf_link_read_relocs |
| 13847 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, |
| 13848 | link_info->keep_memory)); |
| 13849 | if (internal_relocs == NULL) |
| 13850 | goto error_return; |
| 13851 | |
| 13852 | /* Walk through them looking for relaxing opportunities. */ |
| 13853 | irelend = internal_relocs + sec->reloc_count; |
| 13854 | for (irel = internal_relocs; irel < irelend; irel++) |
| 13855 | { |
| 13856 | unsigned long r_symndx = ELF32_R_SYM (irel->r_info); |
| 13857 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); |
| 13858 | bfd_boolean target_is_micromips_code_p; |
| 13859 | unsigned long opcode; |
| 13860 | bfd_vma symval; |
| 13861 | bfd_vma pcrval; |
| 13862 | bfd_byte *ptr; |
| 13863 | int fndopc; |
| 13864 | |
| 13865 | /* The number of bytes to delete for relaxation and from where |
| 13866 | to delete these bytes starting at irel->r_offset. */ |
| 13867 | int delcnt = 0; |
| 13868 | int deloff = 0; |
| 13869 | |
| 13870 | /* If this isn't something that can be relaxed, then ignore |
| 13871 | this reloc. */ |
| 13872 | if (r_type != R_MICROMIPS_HI16 |
| 13873 | && r_type != R_MICROMIPS_PC16_S1 |
| 13874 | && r_type != R_MICROMIPS_26_S1) |
| 13875 | continue; |
| 13876 | |
| 13877 | /* Get the section contents if we haven't done so already. */ |
| 13878 | if (contents == NULL) |
| 13879 | { |
| 13880 | /* Get cached copy if it exists. */ |
| 13881 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 13882 | contents = elf_section_data (sec)->this_hdr.contents; |
| 13883 | /* Go get them off disk. */ |
| 13884 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 13885 | goto error_return; |
| 13886 | } |
| 13887 | ptr = contents + irel->r_offset; |
| 13888 | |
| 13889 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 13890 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| 13891 | { |
| 13892 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 13893 | if (isymbuf == NULL) |
| 13894 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 13895 | symtab_hdr->sh_info, 0, |
| 13896 | NULL, NULL, NULL); |
| 13897 | if (isymbuf == NULL) |
| 13898 | goto error_return; |
| 13899 | } |
| 13900 | |
| 13901 | /* Get the value of the symbol referred to by the reloc. */ |
| 13902 | if (r_symndx < symtab_hdr->sh_info) |
| 13903 | { |
| 13904 | /* A local symbol. */ |
| 13905 | Elf_Internal_Sym *isym; |
| 13906 | asection *sym_sec; |
| 13907 | |
| 13908 | isym = isymbuf + r_symndx; |
| 13909 | if (isym->st_shndx == SHN_UNDEF) |
| 13910 | sym_sec = bfd_und_section_ptr; |
| 13911 | else if (isym->st_shndx == SHN_ABS) |
| 13912 | sym_sec = bfd_abs_section_ptr; |
| 13913 | else if (isym->st_shndx == SHN_COMMON) |
| 13914 | sym_sec = bfd_com_section_ptr; |
| 13915 | else |
| 13916 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 13917 | symval = (isym->st_value |
| 13918 | + sym_sec->output_section->vma |
| 13919 | + sym_sec->output_offset); |
| 13920 | target_is_micromips_code_p = ELF_ST_IS_MICROMIPS (isym->st_other); |
| 13921 | } |
| 13922 | else |
| 13923 | { |
| 13924 | unsigned long indx; |
| 13925 | struct elf_link_hash_entry *h; |
| 13926 | |
| 13927 | /* An external symbol. */ |
| 13928 | indx = r_symndx - symtab_hdr->sh_info; |
| 13929 | h = elf_sym_hashes (abfd)[indx]; |
| 13930 | BFD_ASSERT (h != NULL); |
| 13931 | |
| 13932 | if (h->root.type != bfd_link_hash_defined |
| 13933 | && h->root.type != bfd_link_hash_defweak) |
| 13934 | /* This appears to be a reference to an undefined |
| 13935 | symbol. Just ignore it -- it will be caught by the |
| 13936 | regular reloc processing. */ |
| 13937 | continue; |
| 13938 | |
| 13939 | symval = (h->root.u.def.value |
| 13940 | + h->root.u.def.section->output_section->vma |
| 13941 | + h->root.u.def.section->output_offset); |
| 13942 | target_is_micromips_code_p = (!h->needs_plt |
| 13943 | && ELF_ST_IS_MICROMIPS (h->other)); |
| 13944 | } |
| 13945 | |
| 13946 | |
| 13947 | /* For simplicity of coding, we are going to modify the |
| 13948 | section contents, the section relocs, and the BFD symbol |
| 13949 | table. We must tell the rest of the code not to free up this |
| 13950 | information. It would be possible to instead create a table |
| 13951 | of changes which have to be made, as is done in coff-mips.c; |
| 13952 | that would be more work, but would require less memory when |
| 13953 | the linker is run. */ |
| 13954 | |
| 13955 | /* Only 32-bit instructions relaxed. */ |
| 13956 | if (irel->r_offset + 4 > sec->size) |
| 13957 | continue; |
| 13958 | |
| 13959 | opcode = bfd_get_micromips_32 (abfd, ptr); |
| 13960 | |
| 13961 | /* This is the pc-relative distance from the instruction the |
| 13962 | relocation is applied to, to the symbol referred. */ |
| 13963 | pcrval = (symval |
| 13964 | - (sec->output_section->vma + sec->output_offset) |
| 13965 | - irel->r_offset); |
| 13966 | |
| 13967 | /* R_MICROMIPS_HI16 / LUI relaxation to nil, performing relaxation |
| 13968 | of corresponding R_MICROMIPS_LO16 to R_MICROMIPS_HI0_LO16 or |
| 13969 | R_MICROMIPS_PC23_S2. The R_MICROMIPS_PC23_S2 condition is |
| 13970 | |
| 13971 | (symval % 4 == 0 && IS_BITSIZE (pcrval, 25)) |
| 13972 | |
| 13973 | where pcrval has first to be adjusted to apply against the LO16 |
| 13974 | location (we make the adjustment later on, when we have figured |
| 13975 | out the offset). */ |
| 13976 | if (r_type == R_MICROMIPS_HI16 && MATCH (opcode, lui_insn)) |
| 13977 | { |
| 13978 | bfd_boolean bzc = FALSE; |
| 13979 | unsigned long nextopc; |
| 13980 | unsigned long reg; |
| 13981 | bfd_vma offset; |
| 13982 | |
| 13983 | /* Give up if the previous reloc was a HI16 against this symbol |
| 13984 | too. */ |
| 13985 | if (irel > internal_relocs |
| 13986 | && ELF32_R_TYPE (irel[-1].r_info) == R_MICROMIPS_HI16 |
| 13987 | && ELF32_R_SYM (irel[-1].r_info) == r_symndx) |
| 13988 | continue; |
| 13989 | |
| 13990 | /* Or if the next reloc is not a LO16 against this symbol. */ |
| 13991 | if (irel + 1 >= irelend |
| 13992 | || ELF32_R_TYPE (irel[1].r_info) != R_MICROMIPS_LO16 |
| 13993 | || ELF32_R_SYM (irel[1].r_info) != r_symndx) |
| 13994 | continue; |
| 13995 | |
| 13996 | /* Or if the second next reloc is a LO16 against this symbol too. */ |
| 13997 | if (irel + 2 >= irelend |
| 13998 | && ELF32_R_TYPE (irel[2].r_info) == R_MICROMIPS_LO16 |
| 13999 | && ELF32_R_SYM (irel[2].r_info) == r_symndx) |
| 14000 | continue; |
| 14001 | |
| 14002 | /* See if the LUI instruction *might* be in a branch delay slot. |
| 14003 | We check whether what looks like a 16-bit branch or jump is |
| 14004 | actually an immediate argument to a compact branch, and let |
| 14005 | it through if so. */ |
| 14006 | if (irel->r_offset >= 2 |
| 14007 | && check_br16_dslot (abfd, ptr - 2) |
| 14008 | && !(irel->r_offset >= 4 |
| 14009 | && (bzc = check_relocated_bzc (abfd, |
| 14010 | ptr - 4, irel->r_offset - 4, |
| 14011 | internal_relocs, irelend)))) |
| 14012 | continue; |
| 14013 | if (irel->r_offset >= 4 |
| 14014 | && !bzc |
| 14015 | && check_br32_dslot (abfd, ptr - 4)) |
| 14016 | continue; |
| 14017 | |
| 14018 | reg = OP32_SREG (opcode); |
| 14019 | |
| 14020 | /* We only relax adjacent instructions or ones separated with |
| 14021 | a branch or jump that has a delay slot. The branch or jump |
| 14022 | must not fiddle with the register used to hold the address. |
| 14023 | Subtract 4 for the LUI itself. */ |
| 14024 | offset = irel[1].r_offset - irel[0].r_offset; |
| 14025 | switch (offset - 4) |
| 14026 | { |
| 14027 | case 0: |
| 14028 | break; |
| 14029 | case 2: |
| 14030 | if (check_br16 (abfd, ptr + 4, reg)) |
| 14031 | break; |
| 14032 | continue; |
| 14033 | case 4: |
| 14034 | if (check_br32 (abfd, ptr + 4, reg)) |
| 14035 | break; |
| 14036 | continue; |
| 14037 | default: |
| 14038 | continue; |
| 14039 | } |
| 14040 | |
| 14041 | nextopc = bfd_get_micromips_32 (abfd, contents + irel[1].r_offset); |
| 14042 | |
| 14043 | /* Give up unless the same register is used with both |
| 14044 | relocations. */ |
| 14045 | if (OP32_SREG (nextopc) != reg) |
| 14046 | continue; |
| 14047 | |
| 14048 | /* Now adjust pcrval, subtracting the offset to the LO16 reloc |
| 14049 | and rounding up to take masking of the two LSBs into account. */ |
| 14050 | pcrval = ((pcrval - offset + 3) | 3) ^ 3; |
| 14051 | |
| 14052 | /* R_MICROMIPS_LO16 relaxation to R_MICROMIPS_HI0_LO16. */ |
| 14053 | if (IS_BITSIZE (symval, 16)) |
| 14054 | { |
| 14055 | /* Fix the relocation's type. */ |
| 14056 | irel[1].r_info = ELF32_R_INFO (r_symndx, R_MICROMIPS_HI0_LO16); |
| 14057 | |
| 14058 | /* Instructions using R_MICROMIPS_LO16 have the base or |
| 14059 | source register in bits 20:16. This register becomes $0 |
| 14060 | (zero) as the result of the R_MICROMIPS_HI16 being 0. */ |
| 14061 | nextopc &= ~0x001f0000; |
| 14062 | bfd_put_16 (abfd, (nextopc >> 16) & 0xffff, |
| 14063 | contents + irel[1].r_offset); |
| 14064 | } |
| 14065 | |
| 14066 | /* R_MICROMIPS_LO16 / ADDIU relaxation to R_MICROMIPS_PC23_S2. |
| 14067 | We add 4 to take LUI deletion into account while checking |
| 14068 | the PC-relative distance. */ |
| 14069 | else if (symval % 4 == 0 |
| 14070 | && IS_BITSIZE (pcrval + 4, 25) |
| 14071 | && MATCH (nextopc, addiu_insn) |
| 14072 | && OP32_TREG (nextopc) == OP32_SREG (nextopc) |
| 14073 | && OP16_VALID_REG (OP32_TREG (nextopc))) |
| 14074 | { |
| 14075 | /* Fix the relocation's type. */ |
| 14076 | irel[1].r_info = ELF32_R_INFO (r_symndx, R_MICROMIPS_PC23_S2); |
| 14077 | |
| 14078 | /* Replace ADDIU with the ADDIUPC version. */ |
| 14079 | nextopc = (addiupc_insn.match |
| 14080 | | ADDIUPC_REG_FIELD (OP32_TREG (nextopc))); |
| 14081 | |
| 14082 | bfd_put_micromips_32 (abfd, nextopc, |
| 14083 | contents + irel[1].r_offset); |
| 14084 | } |
| 14085 | |
| 14086 | /* Can't do anything, give up, sigh... */ |
| 14087 | else |
| 14088 | continue; |
| 14089 | |
| 14090 | /* Fix the relocation's type. */ |
| 14091 | irel->r_info = ELF32_R_INFO (r_symndx, R_MIPS_NONE); |
| 14092 | |
| 14093 | /* Delete the LUI instruction: 4 bytes at irel->r_offset. */ |
| 14094 | delcnt = 4; |
| 14095 | deloff = 0; |
| 14096 | } |
| 14097 | |
| 14098 | /* Compact branch relaxation -- due to the multitude of macros |
| 14099 | employed by the compiler/assembler, compact branches are not |
| 14100 | always generated. Obviously, this can/will be fixed elsewhere, |
| 14101 | but there is no drawback in double checking it here. */ |
| 14102 | else if (r_type == R_MICROMIPS_PC16_S1 |
| 14103 | && irel->r_offset + 5 < sec->size |
| 14104 | && ((fndopc = find_match (opcode, bz_rs_insns_32)) >= 0 |
| 14105 | || (fndopc = find_match (opcode, bz_rt_insns_32)) >= 0) |
| 14106 | && ((!insn32 |
| 14107 | && (delcnt = MATCH (bfd_get_16 (abfd, ptr + 4), |
| 14108 | nop_insn_16) ? 2 : 0)) |
| 14109 | || (irel->r_offset + 7 < sec->size |
| 14110 | && (delcnt = MATCH (bfd_get_micromips_32 (abfd, |
| 14111 | ptr + 4), |
| 14112 | nop_insn_32) ? 4 : 0)))) |
| 14113 | { |
| 14114 | unsigned long reg; |
| 14115 | |
| 14116 | reg = OP32_SREG (opcode) ? OP32_SREG (opcode) : OP32_TREG (opcode); |
| 14117 | |
| 14118 | /* Replace BEQZ/BNEZ with the compact version. */ |
| 14119 | opcode = (bzc_insns_32[fndopc].match |
| 14120 | | BZC32_REG_FIELD (reg) |
| 14121 | | (opcode & 0xffff)); /* Addend value. */ |
| 14122 | |
| 14123 | bfd_put_micromips_32 (abfd, opcode, ptr); |
| 14124 | |
| 14125 | /* Delete the delay slot NOP: two or four bytes from |
| 14126 | irel->offset + 4; delcnt has already been set above. */ |
| 14127 | deloff = 4; |
| 14128 | } |
| 14129 | |
| 14130 | /* R_MICROMIPS_PC16_S1 relaxation to R_MICROMIPS_PC10_S1. We need |
| 14131 | to check the distance from the next instruction, so subtract 2. */ |
| 14132 | else if (!insn32 |
| 14133 | && r_type == R_MICROMIPS_PC16_S1 |
| 14134 | && IS_BITSIZE (pcrval - 2, 11) |
| 14135 | && find_match (opcode, b_insns_32) >= 0) |
| 14136 | { |
| 14137 | /* Fix the relocation's type. */ |
| 14138 | irel->r_info = ELF32_R_INFO (r_symndx, R_MICROMIPS_PC10_S1); |
| 14139 | |
| 14140 | /* Replace the 32-bit opcode with a 16-bit opcode. */ |
| 14141 | bfd_put_16 (abfd, |
| 14142 | (b_insn_16.match |
| 14143 | | (opcode & 0x3ff)), /* Addend value. */ |
| 14144 | ptr); |
| 14145 | |
| 14146 | /* Delete 2 bytes from irel->r_offset + 2. */ |
| 14147 | delcnt = 2; |
| 14148 | deloff = 2; |
| 14149 | } |
| 14150 | |
| 14151 | /* R_MICROMIPS_PC16_S1 relaxation to R_MICROMIPS_PC7_S1. We need |
| 14152 | to check the distance from the next instruction, so subtract 2. */ |
| 14153 | else if (!insn32 |
| 14154 | && r_type == R_MICROMIPS_PC16_S1 |
| 14155 | && IS_BITSIZE (pcrval - 2, 8) |
| 14156 | && (((fndopc = find_match (opcode, bz_rs_insns_32)) >= 0 |
| 14157 | && OP16_VALID_REG (OP32_SREG (opcode))) |
| 14158 | || ((fndopc = find_match (opcode, bz_rt_insns_32)) >= 0 |
| 14159 | && OP16_VALID_REG (OP32_TREG (opcode))))) |
| 14160 | { |
| 14161 | unsigned long reg; |
| 14162 | |
| 14163 | reg = OP32_SREG (opcode) ? OP32_SREG (opcode) : OP32_TREG (opcode); |
| 14164 | |
| 14165 | /* Fix the relocation's type. */ |
| 14166 | irel->r_info = ELF32_R_INFO (r_symndx, R_MICROMIPS_PC7_S1); |
| 14167 | |
| 14168 | /* Replace the 32-bit opcode with a 16-bit opcode. */ |
| 14169 | bfd_put_16 (abfd, |
| 14170 | (bz_insns_16[fndopc].match |
| 14171 | | BZ16_REG_FIELD (reg) |
| 14172 | | (opcode & 0x7f)), /* Addend value. */ |
| 14173 | ptr); |
| 14174 | |
| 14175 | /* Delete 2 bytes from irel->r_offset + 2. */ |
| 14176 | delcnt = 2; |
| 14177 | deloff = 2; |
| 14178 | } |
| 14179 | |
| 14180 | /* R_MICROMIPS_26_S1 -- JAL to JALS relaxation for microMIPS targets. */ |
| 14181 | else if (!insn32 |
| 14182 | && r_type == R_MICROMIPS_26_S1 |
| 14183 | && target_is_micromips_code_p |
| 14184 | && irel->r_offset + 7 < sec->size |
| 14185 | && MATCH (opcode, jal_insn_32_bd32)) |
| 14186 | { |
| 14187 | unsigned long n32opc; |
| 14188 | bfd_boolean relaxed = FALSE; |
| 14189 | |
| 14190 | n32opc = bfd_get_micromips_32 (abfd, ptr + 4); |
| 14191 | |
| 14192 | if (MATCH (n32opc, nop_insn_32)) |
| 14193 | { |
| 14194 | /* Replace delay slot 32-bit NOP with a 16-bit NOP. */ |
| 14195 | bfd_put_16 (abfd, nop_insn_16.match, ptr + 4); |
| 14196 | |
| 14197 | relaxed = TRUE; |
| 14198 | } |
| 14199 | else if (find_match (n32opc, move_insns_32) >= 0) |
| 14200 | { |
| 14201 | /* Replace delay slot 32-bit MOVE with 16-bit MOVE. */ |
| 14202 | bfd_put_16 (abfd, |
| 14203 | (move_insn_16.match |
| 14204 | | MOVE16_RD_FIELD (MOVE32_RD (n32opc)) |
| 14205 | | MOVE16_RS_FIELD (MOVE32_RS (n32opc))), |
| 14206 | ptr + 4); |
| 14207 | |
| 14208 | relaxed = TRUE; |
| 14209 | } |
| 14210 | /* Other 32-bit instructions relaxable to 16-bit |
| 14211 | instructions will be handled here later. */ |
| 14212 | |
| 14213 | if (relaxed) |
| 14214 | { |
| 14215 | /* JAL with 32-bit delay slot that is changed to a JALS |
| 14216 | with 16-bit delay slot. */ |
| 14217 | bfd_put_micromips_32 (abfd, jal_insn_32_bd16.match, ptr); |
| 14218 | |
| 14219 | /* Delete 2 bytes from irel->r_offset + 6. */ |
| 14220 | delcnt = 2; |
| 14221 | deloff = 6; |
| 14222 | } |
| 14223 | } |
| 14224 | |
| 14225 | if (delcnt != 0) |
| 14226 | { |
| 14227 | /* Note that we've changed the relocs, section contents, etc. */ |
| 14228 | elf_section_data (sec)->relocs = internal_relocs; |
| 14229 | elf_section_data (sec)->this_hdr.contents = contents; |
| 14230 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 14231 | |
| 14232 | /* Delete bytes depending on the delcnt and deloff. */ |
| 14233 | if (!mips_elf_relax_delete_bytes (abfd, sec, |
| 14234 | irel->r_offset + deloff, delcnt)) |
| 14235 | goto error_return; |
| 14236 | |
| 14237 | /* That will change things, so we should relax again. |
| 14238 | Note that this is not required, and it may be slow. */ |
| 14239 | *again = TRUE; |
| 14240 | } |
| 14241 | } |
| 14242 | |
| 14243 | if (isymbuf != NULL |
| 14244 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 14245 | { |
| 14246 | if (! link_info->keep_memory) |
| 14247 | free (isymbuf); |
| 14248 | else |
| 14249 | { |
| 14250 | /* Cache the symbols for elf_link_input_bfd. */ |
| 14251 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 14252 | } |
| 14253 | } |
| 14254 | |
| 14255 | if (contents != NULL |
| 14256 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 14257 | { |
| 14258 | if (! link_info->keep_memory) |
| 14259 | free (contents); |
| 14260 | else |
| 14261 | { |
| 14262 | /* Cache the section contents for elf_link_input_bfd. */ |
| 14263 | elf_section_data (sec)->this_hdr.contents = contents; |
| 14264 | } |
| 14265 | } |
| 14266 | |
| 14267 | if (internal_relocs != NULL |
| 14268 | && elf_section_data (sec)->relocs != internal_relocs) |
| 14269 | free (internal_relocs); |
| 14270 | |
| 14271 | return TRUE; |
| 14272 | |
| 14273 | error_return: |
| 14274 | if (isymbuf != NULL |
| 14275 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 14276 | free (isymbuf); |
| 14277 | if (contents != NULL |
| 14278 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 14279 | free (contents); |
| 14280 | if (internal_relocs != NULL |
| 14281 | && elf_section_data (sec)->relocs != internal_relocs) |
| 14282 | free (internal_relocs); |
| 14283 | |
| 14284 | return FALSE; |
| 14285 | } |
| 14286 | \f |
| 14287 | /* Create a MIPS ELF linker hash table. */ |
| 14288 | |
| 14289 | struct bfd_link_hash_table * |
| 14290 | _bfd_mips_elf_link_hash_table_create (bfd *abfd) |
| 14291 | { |
| 14292 | struct mips_elf_link_hash_table *ret; |
| 14293 | size_t amt = sizeof (struct mips_elf_link_hash_table); |
| 14294 | |
| 14295 | ret = bfd_zmalloc (amt); |
| 14296 | if (ret == NULL) |
| 14297 | return NULL; |
| 14298 | |
| 14299 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 14300 | mips_elf_link_hash_newfunc, |
| 14301 | sizeof (struct mips_elf_link_hash_entry), |
| 14302 | MIPS_ELF_DATA)) |
| 14303 | { |
| 14304 | free (ret); |
| 14305 | return NULL; |
| 14306 | } |
| 14307 | ret->root.init_plt_refcount.plist = NULL; |
| 14308 | ret->root.init_plt_offset.plist = NULL; |
| 14309 | |
| 14310 | return &ret->root.root; |
| 14311 | } |
| 14312 | |
| 14313 | /* Likewise, but indicate that the target is VxWorks. */ |
| 14314 | |
| 14315 | struct bfd_link_hash_table * |
| 14316 | _bfd_mips_vxworks_link_hash_table_create (bfd *abfd) |
| 14317 | { |
| 14318 | struct bfd_link_hash_table *ret; |
| 14319 | |
| 14320 | ret = _bfd_mips_elf_link_hash_table_create (abfd); |
| 14321 | if (ret) |
| 14322 | { |
| 14323 | struct mips_elf_link_hash_table *htab; |
| 14324 | |
| 14325 | htab = (struct mips_elf_link_hash_table *) ret; |
| 14326 | htab->use_plts_and_copy_relocs = TRUE; |
| 14327 | htab->is_vxworks = TRUE; |
| 14328 | } |
| 14329 | return ret; |
| 14330 | } |
| 14331 | |
| 14332 | /* A function that the linker calls if we are allowed to use PLTs |
| 14333 | and copy relocs. */ |
| 14334 | |
| 14335 | void |
| 14336 | _bfd_mips_elf_use_plts_and_copy_relocs (struct bfd_link_info *info) |
| 14337 | { |
| 14338 | mips_elf_hash_table (info)->use_plts_and_copy_relocs = TRUE; |
| 14339 | } |
| 14340 | |
| 14341 | /* A function that the linker calls to select between all or only |
| 14342 | 32-bit microMIPS instructions, and between making or ignoring |
| 14343 | branch relocation checks for invalid transitions between ISA modes. |
| 14344 | Also record whether we have been configured for a GNU target. */ |
| 14345 | |
| 14346 | void |
| 14347 | _bfd_mips_elf_linker_flags (struct bfd_link_info *info, bfd_boolean insn32, |
| 14348 | bfd_boolean ignore_branch_isa, |
| 14349 | bfd_boolean gnu_target) |
| 14350 | { |
| 14351 | mips_elf_hash_table (info)->insn32 = insn32; |
| 14352 | mips_elf_hash_table (info)->ignore_branch_isa = ignore_branch_isa; |
| 14353 | mips_elf_hash_table (info)->gnu_target = gnu_target; |
| 14354 | } |
| 14355 | |
| 14356 | /* A function that the linker calls to enable use of compact branches in |
| 14357 | linker generated code for MIPSR6. */ |
| 14358 | |
| 14359 | void |
| 14360 | _bfd_mips_elf_compact_branches (struct bfd_link_info *info, bfd_boolean on) |
| 14361 | { |
| 14362 | mips_elf_hash_table (info)->compact_branches = on; |
| 14363 | } |
| 14364 | |
| 14365 | \f |
| 14366 | /* Structure for saying that BFD machine EXTENSION extends BASE. */ |
| 14367 | |
| 14368 | struct mips_mach_extension |
| 14369 | { |
| 14370 | unsigned long extension, base; |
| 14371 | }; |
| 14372 | |
| 14373 | |
| 14374 | /* An array describing how BFD machines relate to one another. The entries |
| 14375 | are ordered topologically with MIPS I extensions listed last. */ |
| 14376 | |
| 14377 | static const struct mips_mach_extension mips_mach_extensions[] = |
| 14378 | { |
| 14379 | /* MIPS64r2 extensions. */ |
| 14380 | { bfd_mach_mips_octeon3, bfd_mach_mips_octeon2 }, |
| 14381 | { bfd_mach_mips_octeon2, bfd_mach_mips_octeonp }, |
| 14382 | { bfd_mach_mips_octeonp, bfd_mach_mips_octeon }, |
| 14383 | { bfd_mach_mips_octeon, bfd_mach_mipsisa64r2 }, |
| 14384 | { bfd_mach_mips_gs264e, bfd_mach_mips_gs464e }, |
| 14385 | { bfd_mach_mips_gs464e, bfd_mach_mips_gs464 }, |
| 14386 | { bfd_mach_mips_gs464, bfd_mach_mipsisa64r2 }, |
| 14387 | |
| 14388 | /* MIPS64 extensions. */ |
| 14389 | { bfd_mach_mipsisa64r2, bfd_mach_mipsisa64 }, |
| 14390 | { bfd_mach_mips_sb1, bfd_mach_mipsisa64 }, |
| 14391 | { bfd_mach_mips_xlr, bfd_mach_mipsisa64 }, |
| 14392 | |
| 14393 | /* MIPS V extensions. */ |
| 14394 | { bfd_mach_mipsisa64, bfd_mach_mips5 }, |
| 14395 | |
| 14396 | /* R10000 extensions. */ |
| 14397 | { bfd_mach_mips12000, bfd_mach_mips10000 }, |
| 14398 | { bfd_mach_mips14000, bfd_mach_mips10000 }, |
| 14399 | { bfd_mach_mips16000, bfd_mach_mips10000 }, |
| 14400 | |
| 14401 | /* R5000 extensions. Note: the vr5500 ISA is an extension of the core |
| 14402 | vr5400 ISA, but doesn't include the multimedia stuff. It seems |
| 14403 | better to allow vr5400 and vr5500 code to be merged anyway, since |
| 14404 | many libraries will just use the core ISA. Perhaps we could add |
| 14405 | some sort of ASE flag if this ever proves a problem. */ |
| 14406 | { bfd_mach_mips5500, bfd_mach_mips5400 }, |
| 14407 | { bfd_mach_mips5400, bfd_mach_mips5000 }, |
| 14408 | |
| 14409 | /* MIPS IV extensions. */ |
| 14410 | { bfd_mach_mips5, bfd_mach_mips8000 }, |
| 14411 | { bfd_mach_mips10000, bfd_mach_mips8000 }, |
| 14412 | { bfd_mach_mips5000, bfd_mach_mips8000 }, |
| 14413 | { bfd_mach_mips7000, bfd_mach_mips8000 }, |
| 14414 | { bfd_mach_mips9000, bfd_mach_mips8000 }, |
| 14415 | |
| 14416 | /* VR4100 extensions. */ |
| 14417 | { bfd_mach_mips4120, bfd_mach_mips4100 }, |
| 14418 | { bfd_mach_mips4111, bfd_mach_mips4100 }, |
| 14419 | |
| 14420 | /* MIPS III extensions. */ |
| 14421 | { bfd_mach_mips_loongson_2e, bfd_mach_mips4000 }, |
| 14422 | { bfd_mach_mips_loongson_2f, bfd_mach_mips4000 }, |
| 14423 | { bfd_mach_mips8000, bfd_mach_mips4000 }, |
| 14424 | { bfd_mach_mips4650, bfd_mach_mips4000 }, |
| 14425 | { bfd_mach_mips4600, bfd_mach_mips4000 }, |
| 14426 | { bfd_mach_mips4400, bfd_mach_mips4000 }, |
| 14427 | { bfd_mach_mips4300, bfd_mach_mips4000 }, |
| 14428 | { bfd_mach_mips4100, bfd_mach_mips4000 }, |
| 14429 | { bfd_mach_mips5900, bfd_mach_mips4000 }, |
| 14430 | |
| 14431 | /* MIPS32r3 extensions. */ |
| 14432 | { bfd_mach_mips_interaptiv_mr2, bfd_mach_mipsisa32r3 }, |
| 14433 | |
| 14434 | /* MIPS32r2 extensions. */ |
| 14435 | { bfd_mach_mipsisa32r3, bfd_mach_mipsisa32r2 }, |
| 14436 | |
| 14437 | /* MIPS32 extensions. */ |
| 14438 | { bfd_mach_mipsisa32r2, bfd_mach_mipsisa32 }, |
| 14439 | |
| 14440 | /* MIPS II extensions. */ |
| 14441 | { bfd_mach_mips4000, bfd_mach_mips6000 }, |
| 14442 | { bfd_mach_mipsisa32, bfd_mach_mips6000 }, |
| 14443 | { bfd_mach_mips4010, bfd_mach_mips6000 }, |
| 14444 | |
| 14445 | /* MIPS I extensions. */ |
| 14446 | { bfd_mach_mips6000, bfd_mach_mips3000 }, |
| 14447 | { bfd_mach_mips3900, bfd_mach_mips3000 } |
| 14448 | }; |
| 14449 | |
| 14450 | /* Return true if bfd machine EXTENSION is an extension of machine BASE. */ |
| 14451 | |
| 14452 | static bfd_boolean |
| 14453 | mips_mach_extends_p (unsigned long base, unsigned long extension) |
| 14454 | { |
| 14455 | size_t i; |
| 14456 | |
| 14457 | if (extension == base) |
| 14458 | return TRUE; |
| 14459 | |
| 14460 | if (base == bfd_mach_mipsisa32 |
| 14461 | && mips_mach_extends_p (bfd_mach_mipsisa64, extension)) |
| 14462 | return TRUE; |
| 14463 | |
| 14464 | if (base == bfd_mach_mipsisa32r2 |
| 14465 | && mips_mach_extends_p (bfd_mach_mipsisa64r2, extension)) |
| 14466 | return TRUE; |
| 14467 | |
| 14468 | for (i = 0; i < ARRAY_SIZE (mips_mach_extensions); i++) |
| 14469 | if (extension == mips_mach_extensions[i].extension) |
| 14470 | { |
| 14471 | extension = mips_mach_extensions[i].base; |
| 14472 | if (extension == base) |
| 14473 | return TRUE; |
| 14474 | } |
| 14475 | |
| 14476 | return FALSE; |
| 14477 | } |
| 14478 | |
| 14479 | /* Return the BFD mach for each .MIPS.abiflags ISA Extension. */ |
| 14480 | |
| 14481 | static unsigned long |
| 14482 | bfd_mips_isa_ext_mach (unsigned int isa_ext) |
| 14483 | { |
| 14484 | switch (isa_ext) |
| 14485 | { |
| 14486 | case AFL_EXT_3900: return bfd_mach_mips3900; |
| 14487 | case AFL_EXT_4010: return bfd_mach_mips4010; |
| 14488 | case AFL_EXT_4100: return bfd_mach_mips4100; |
| 14489 | case AFL_EXT_4111: return bfd_mach_mips4111; |
| 14490 | case AFL_EXT_4120: return bfd_mach_mips4120; |
| 14491 | case AFL_EXT_4650: return bfd_mach_mips4650; |
| 14492 | case AFL_EXT_5400: return bfd_mach_mips5400; |
| 14493 | case AFL_EXT_5500: return bfd_mach_mips5500; |
| 14494 | case AFL_EXT_5900: return bfd_mach_mips5900; |
| 14495 | case AFL_EXT_10000: return bfd_mach_mips10000; |
| 14496 | case AFL_EXT_LOONGSON_2E: return bfd_mach_mips_loongson_2e; |
| 14497 | case AFL_EXT_LOONGSON_2F: return bfd_mach_mips_loongson_2f; |
| 14498 | case AFL_EXT_SB1: return bfd_mach_mips_sb1; |
| 14499 | case AFL_EXT_OCTEON: return bfd_mach_mips_octeon; |
| 14500 | case AFL_EXT_OCTEONP: return bfd_mach_mips_octeonp; |
| 14501 | case AFL_EXT_OCTEON2: return bfd_mach_mips_octeon2; |
| 14502 | case AFL_EXT_XLR: return bfd_mach_mips_xlr; |
| 14503 | default: return bfd_mach_mips3000; |
| 14504 | } |
| 14505 | } |
| 14506 | |
| 14507 | /* Return the .MIPS.abiflags value representing each ISA Extension. */ |
| 14508 | |
| 14509 | unsigned int |
| 14510 | bfd_mips_isa_ext (bfd *abfd) |
| 14511 | { |
| 14512 | switch (bfd_get_mach (abfd)) |
| 14513 | { |
| 14514 | case bfd_mach_mips3900: return AFL_EXT_3900; |
| 14515 | case bfd_mach_mips4010: return AFL_EXT_4010; |
| 14516 | case bfd_mach_mips4100: return AFL_EXT_4100; |
| 14517 | case bfd_mach_mips4111: return AFL_EXT_4111; |
| 14518 | case bfd_mach_mips4120: return AFL_EXT_4120; |
| 14519 | case bfd_mach_mips4650: return AFL_EXT_4650; |
| 14520 | case bfd_mach_mips5400: return AFL_EXT_5400; |
| 14521 | case bfd_mach_mips5500: return AFL_EXT_5500; |
| 14522 | case bfd_mach_mips5900: return AFL_EXT_5900; |
| 14523 | case bfd_mach_mips10000: return AFL_EXT_10000; |
| 14524 | case bfd_mach_mips_loongson_2e: return AFL_EXT_LOONGSON_2E; |
| 14525 | case bfd_mach_mips_loongson_2f: return AFL_EXT_LOONGSON_2F; |
| 14526 | case bfd_mach_mips_sb1: return AFL_EXT_SB1; |
| 14527 | case bfd_mach_mips_octeon: return AFL_EXT_OCTEON; |
| 14528 | case bfd_mach_mips_octeonp: return AFL_EXT_OCTEONP; |
| 14529 | case bfd_mach_mips_octeon3: return AFL_EXT_OCTEON3; |
| 14530 | case bfd_mach_mips_octeon2: return AFL_EXT_OCTEON2; |
| 14531 | case bfd_mach_mips_xlr: return AFL_EXT_XLR; |
| 14532 | case bfd_mach_mips_interaptiv_mr2: |
| 14533 | return AFL_EXT_INTERAPTIV_MR2; |
| 14534 | default: return 0; |
| 14535 | } |
| 14536 | } |
| 14537 | |
| 14538 | /* Encode ISA level and revision as a single value. */ |
| 14539 | #define LEVEL_REV(LEV,REV) ((LEV) << 3 | (REV)) |
| 14540 | |
| 14541 | /* Decode a single value into level and revision. */ |
| 14542 | #define ISA_LEVEL(LEVREV) ((LEVREV) >> 3) |
| 14543 | #define ISA_REV(LEVREV) ((LEVREV) & 0x7) |
| 14544 | |
| 14545 | /* Update the isa_level, isa_rev, isa_ext fields of abiflags. */ |
| 14546 | |
| 14547 | static void |
| 14548 | update_mips_abiflags_isa (bfd *abfd, Elf_Internal_ABIFlags_v0 *abiflags) |
| 14549 | { |
| 14550 | int new_isa = 0; |
| 14551 | switch (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) |
| 14552 | { |
| 14553 | case E_MIPS_ARCH_1: new_isa = LEVEL_REV (1, 0); break; |
| 14554 | case E_MIPS_ARCH_2: new_isa = LEVEL_REV (2, 0); break; |
| 14555 | case E_MIPS_ARCH_3: new_isa = LEVEL_REV (3, 0); break; |
| 14556 | case E_MIPS_ARCH_4: new_isa = LEVEL_REV (4, 0); break; |
| 14557 | case E_MIPS_ARCH_5: new_isa = LEVEL_REV (5, 0); break; |
| 14558 | case E_MIPS_ARCH_32: new_isa = LEVEL_REV (32, 1); break; |
| 14559 | case E_MIPS_ARCH_32R2: new_isa = LEVEL_REV (32, 2); break; |
| 14560 | case E_MIPS_ARCH_32R6: new_isa = LEVEL_REV (32, 6); break; |
| 14561 | case E_MIPS_ARCH_64: new_isa = LEVEL_REV (64, 1); break; |
| 14562 | case E_MIPS_ARCH_64R2: new_isa = LEVEL_REV (64, 2); break; |
| 14563 | case E_MIPS_ARCH_64R6: new_isa = LEVEL_REV (64, 6); break; |
| 14564 | default: |
| 14565 | _bfd_error_handler |
| 14566 | /* xgettext:c-format */ |
| 14567 | (_("%pB: unknown architecture %s"), |
| 14568 | abfd, bfd_printable_name (abfd)); |
| 14569 | } |
| 14570 | |
| 14571 | if (new_isa > LEVEL_REV (abiflags->isa_level, abiflags->isa_rev)) |
| 14572 | { |
| 14573 | abiflags->isa_level = ISA_LEVEL (new_isa); |
| 14574 | abiflags->isa_rev = ISA_REV (new_isa); |
| 14575 | } |
| 14576 | |
| 14577 | /* Update the isa_ext if ABFD describes a further extension. */ |
| 14578 | if (mips_mach_extends_p (bfd_mips_isa_ext_mach (abiflags->isa_ext), |
| 14579 | bfd_get_mach (abfd))) |
| 14580 | abiflags->isa_ext = bfd_mips_isa_ext (abfd); |
| 14581 | } |
| 14582 | |
| 14583 | /* Return true if the given ELF header flags describe a 32-bit binary. */ |
| 14584 | |
| 14585 | static bfd_boolean |
| 14586 | mips_32bit_flags_p (flagword flags) |
| 14587 | { |
| 14588 | return ((flags & EF_MIPS_32BITMODE) != 0 |
| 14589 | || (flags & EF_MIPS_ABI) == E_MIPS_ABI_O32 |
| 14590 | || (flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI32 |
| 14591 | || (flags & EF_MIPS_ARCH) == E_MIPS_ARCH_1 |
| 14592 | || (flags & EF_MIPS_ARCH) == E_MIPS_ARCH_2 |
| 14593 | || (flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32 |
| 14594 | || (flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32R2 |
| 14595 | || (flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32R6); |
| 14596 | } |
| 14597 | |
| 14598 | /* Infer the content of the ABI flags based on the elf header. */ |
| 14599 | |
| 14600 | static void |
| 14601 | infer_mips_abiflags (bfd *abfd, Elf_Internal_ABIFlags_v0* abiflags) |
| 14602 | { |
| 14603 | obj_attribute *in_attr; |
| 14604 | |
| 14605 | memset (abiflags, 0, sizeof (Elf_Internal_ABIFlags_v0)); |
| 14606 | update_mips_abiflags_isa (abfd, abiflags); |
| 14607 | |
| 14608 | if (mips_32bit_flags_p (elf_elfheader (abfd)->e_flags)) |
| 14609 | abiflags->gpr_size = AFL_REG_32; |
| 14610 | else |
| 14611 | abiflags->gpr_size = AFL_REG_64; |
| 14612 | |
| 14613 | abiflags->cpr1_size = AFL_REG_NONE; |
| 14614 | |
| 14615 | in_attr = elf_known_obj_attributes (abfd)[OBJ_ATTR_GNU]; |
| 14616 | abiflags->fp_abi = in_attr[Tag_GNU_MIPS_ABI_FP].i; |
| 14617 | |
| 14618 | if (abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_SINGLE |
| 14619 | || abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_XX |
| 14620 | || (abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_DOUBLE |
| 14621 | && abiflags->gpr_size == AFL_REG_32)) |
| 14622 | abiflags->cpr1_size = AFL_REG_32; |
| 14623 | else if (abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_DOUBLE |
| 14624 | || abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_64 |
| 14625 | || abiflags->fp_abi == Val_GNU_MIPS_ABI_FP_64A) |
| 14626 | abiflags->cpr1_size = AFL_REG_64; |
| 14627 | |
| 14628 | abiflags->cpr2_size = AFL_REG_NONE; |
| 14629 | |
| 14630 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_MDMX) |
| 14631 | abiflags->ases |= AFL_ASE_MDMX; |
| 14632 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_M16) |
| 14633 | abiflags->ases |= AFL_ASE_MIPS16; |
| 14634 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_MICROMIPS) |
| 14635 | abiflags->ases |= AFL_ASE_MICROMIPS; |
| 14636 | |
| 14637 | if (abiflags->fp_abi != Val_GNU_MIPS_ABI_FP_ANY |
| 14638 | && abiflags->fp_abi != Val_GNU_MIPS_ABI_FP_SOFT |
| 14639 | && abiflags->fp_abi != Val_GNU_MIPS_ABI_FP_64A |
| 14640 | && abiflags->isa_level >= 32 |
| 14641 | && abiflags->ases != AFL_ASE_LOONGSON_EXT) |
| 14642 | abiflags->flags1 |= AFL_FLAGS1_ODDSPREG; |
| 14643 | } |
| 14644 | |
| 14645 | /* We need to use a special link routine to handle the .reginfo and |
| 14646 | the .mdebug sections. We need to merge all instances of these |
| 14647 | sections together, not write them all out sequentially. */ |
| 14648 | |
| 14649 | bfd_boolean |
| 14650 | _bfd_mips_elf_final_link (bfd *abfd, struct bfd_link_info *info) |
| 14651 | { |
| 14652 | asection *o; |
| 14653 | struct bfd_link_order *p; |
| 14654 | asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec; |
| 14655 | asection *rtproc_sec, *abiflags_sec; |
| 14656 | Elf32_RegInfo reginfo; |
| 14657 | struct ecoff_debug_info debug; |
| 14658 | struct mips_htab_traverse_info hti; |
| 14659 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 14660 | const struct ecoff_debug_swap *swap = bed->elf_backend_ecoff_debug_swap; |
| 14661 | HDRR *symhdr = &debug.symbolic_header; |
| 14662 | void *mdebug_handle = NULL; |
| 14663 | asection *s; |
| 14664 | EXTR esym; |
| 14665 | unsigned int i; |
| 14666 | bfd_size_type amt; |
| 14667 | struct mips_elf_link_hash_table *htab; |
| 14668 | |
| 14669 | static const char * const secname[] = |
| 14670 | { |
| 14671 | ".text", ".init", ".fini", ".data", |
| 14672 | ".rodata", ".sdata", ".sbss", ".bss" |
| 14673 | }; |
| 14674 | static const int sc[] = |
| 14675 | { |
| 14676 | scText, scInit, scFini, scData, |
| 14677 | scRData, scSData, scSBss, scBss |
| 14678 | }; |
| 14679 | |
| 14680 | htab = mips_elf_hash_table (info); |
| 14681 | BFD_ASSERT (htab != NULL); |
| 14682 | |
| 14683 | /* Sort the dynamic symbols so that those with GOT entries come after |
| 14684 | those without. */ |
| 14685 | if (!mips_elf_sort_hash_table (abfd, info)) |
| 14686 | return FALSE; |
| 14687 | |
| 14688 | /* Create any scheduled LA25 stubs. */ |
| 14689 | hti.info = info; |
| 14690 | hti.output_bfd = abfd; |
| 14691 | hti.error = FALSE; |
| 14692 | htab_traverse (htab->la25_stubs, mips_elf_create_la25_stub, &hti); |
| 14693 | if (hti.error) |
| 14694 | return FALSE; |
| 14695 | |
| 14696 | /* Get a value for the GP register. */ |
| 14697 | if (elf_gp (abfd) == 0) |
| 14698 | { |
| 14699 | struct bfd_link_hash_entry *h; |
| 14700 | |
| 14701 | h = bfd_link_hash_lookup (info->hash, "_gp", FALSE, FALSE, TRUE); |
| 14702 | if (h != NULL && h->type == bfd_link_hash_defined) |
| 14703 | elf_gp (abfd) = (h->u.def.value |
| 14704 | + h->u.def.section->output_section->vma |
| 14705 | + h->u.def.section->output_offset); |
| 14706 | else if (htab->is_vxworks |
| 14707 | && (h = bfd_link_hash_lookup (info->hash, |
| 14708 | "_GLOBAL_OFFSET_TABLE_", |
| 14709 | FALSE, FALSE, TRUE)) |
| 14710 | && h->type == bfd_link_hash_defined) |
| 14711 | elf_gp (abfd) = (h->u.def.section->output_section->vma |
| 14712 | + h->u.def.section->output_offset |
| 14713 | + h->u.def.value); |
| 14714 | else if (bfd_link_relocatable (info)) |
| 14715 | { |
| 14716 | bfd_vma lo = MINUS_ONE; |
| 14717 | |
| 14718 | /* Find the GP-relative section with the lowest offset. */ |
| 14719 | for (o = abfd->sections; o != NULL; o = o->next) |
| 14720 | if (o->vma < lo |
| 14721 | && (elf_section_data (o)->this_hdr.sh_flags & SHF_MIPS_GPREL)) |
| 14722 | lo = o->vma; |
| 14723 | |
| 14724 | /* And calculate GP relative to that. */ |
| 14725 | elf_gp (abfd) = lo + ELF_MIPS_GP_OFFSET (info); |
| 14726 | } |
| 14727 | else |
| 14728 | { |
| 14729 | /* If the relocate_section function needs to do a reloc |
| 14730 | involving the GP value, it should make a reloc_dangerous |
| 14731 | callback to warn that GP is not defined. */ |
| 14732 | } |
| 14733 | } |
| 14734 | |
| 14735 | /* Go through the sections and collect the .reginfo and .mdebug |
| 14736 | information. */ |
| 14737 | abiflags_sec = NULL; |
| 14738 | reginfo_sec = NULL; |
| 14739 | mdebug_sec = NULL; |
| 14740 | gptab_data_sec = NULL; |
| 14741 | gptab_bss_sec = NULL; |
| 14742 | for (o = abfd->sections; o != NULL; o = o->next) |
| 14743 | { |
| 14744 | if (strcmp (o->name, ".MIPS.abiflags") == 0) |
| 14745 | { |
| 14746 | /* We have found the .MIPS.abiflags section in the output file. |
| 14747 | Look through all the link_orders comprising it and remove them. |
| 14748 | The data is merged in _bfd_mips_elf_merge_private_bfd_data. */ |
| 14749 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
| 14750 | { |
| 14751 | asection *input_section; |
| 14752 | |
| 14753 | if (p->type != bfd_indirect_link_order) |
| 14754 | { |
| 14755 | if (p->type == bfd_data_link_order) |
| 14756 | continue; |
| 14757 | abort (); |
| 14758 | } |
| 14759 | |
| 14760 | input_section = p->u.indirect.section; |
| 14761 | |
| 14762 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 14763 | elf_link_input_bfd ignores this section. */ |
| 14764 | input_section->flags &= ~SEC_HAS_CONTENTS; |
| 14765 | } |
| 14766 | |
| 14767 | /* Size has been set in _bfd_mips_elf_always_size_sections. */ |
| 14768 | BFD_ASSERT(o->size == sizeof (Elf_External_ABIFlags_v0)); |
| 14769 | |
| 14770 | /* Skip this section later on (I don't think this currently |
| 14771 | matters, but someday it might). */ |
| 14772 | o->map_head.link_order = NULL; |
| 14773 | |
| 14774 | abiflags_sec = o; |
| 14775 | } |
| 14776 | |
| 14777 | if (strcmp (o->name, ".reginfo") == 0) |
| 14778 | { |
| 14779 | memset (®info, 0, sizeof reginfo); |
| 14780 | |
| 14781 | /* We have found the .reginfo section in the output file. |
| 14782 | Look through all the link_orders comprising it and merge |
| 14783 | the information together. */ |
| 14784 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
| 14785 | { |
| 14786 | asection *input_section; |
| 14787 | bfd *input_bfd; |
| 14788 | Elf32_External_RegInfo ext; |
| 14789 | Elf32_RegInfo sub; |
| 14790 | bfd_size_type sz; |
| 14791 | |
| 14792 | if (p->type != bfd_indirect_link_order) |
| 14793 | { |
| 14794 | if (p->type == bfd_data_link_order) |
| 14795 | continue; |
| 14796 | abort (); |
| 14797 | } |
| 14798 | |
| 14799 | input_section = p->u.indirect.section; |
| 14800 | input_bfd = input_section->owner; |
| 14801 | |
| 14802 | sz = (input_section->size < sizeof (ext) |
| 14803 | ? input_section->size : sizeof (ext)); |
| 14804 | memset (&ext, 0, sizeof (ext)); |
| 14805 | if (! bfd_get_section_contents (input_bfd, input_section, |
| 14806 | &ext, 0, sz)) |
| 14807 | return FALSE; |
| 14808 | |
| 14809 | bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub); |
| 14810 | |
| 14811 | reginfo.ri_gprmask |= sub.ri_gprmask; |
| 14812 | reginfo.ri_cprmask[0] |= sub.ri_cprmask[0]; |
| 14813 | reginfo.ri_cprmask[1] |= sub.ri_cprmask[1]; |
| 14814 | reginfo.ri_cprmask[2] |= sub.ri_cprmask[2]; |
| 14815 | reginfo.ri_cprmask[3] |= sub.ri_cprmask[3]; |
| 14816 | |
| 14817 | /* ri_gp_value is set by the function |
| 14818 | `_bfd_mips_elf_section_processing' when the section is |
| 14819 | finally written out. */ |
| 14820 | |
| 14821 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 14822 | elf_link_input_bfd ignores this section. */ |
| 14823 | input_section->flags &= ~SEC_HAS_CONTENTS; |
| 14824 | } |
| 14825 | |
| 14826 | /* Size has been set in _bfd_mips_elf_always_size_sections. */ |
| 14827 | BFD_ASSERT(o->size == sizeof (Elf32_External_RegInfo)); |
| 14828 | |
| 14829 | /* Skip this section later on (I don't think this currently |
| 14830 | matters, but someday it might). */ |
| 14831 | o->map_head.link_order = NULL; |
| 14832 | |
| 14833 | reginfo_sec = o; |
| 14834 | } |
| 14835 | |
| 14836 | if (strcmp (o->name, ".mdebug") == 0) |
| 14837 | { |
| 14838 | struct extsym_info einfo; |
| 14839 | bfd_vma last; |
| 14840 | |
| 14841 | /* We have found the .mdebug section in the output file. |
| 14842 | Look through all the link_orders comprising it and merge |
| 14843 | the information together. */ |
| 14844 | symhdr->magic = swap->sym_magic; |
| 14845 | /* FIXME: What should the version stamp be? */ |
| 14846 | symhdr->vstamp = 0; |
| 14847 | symhdr->ilineMax = 0; |
| 14848 | symhdr->cbLine = 0; |
| 14849 | symhdr->idnMax = 0; |
| 14850 | symhdr->ipdMax = 0; |
| 14851 | symhdr->isymMax = 0; |
| 14852 | symhdr->ioptMax = 0; |
| 14853 | symhdr->iauxMax = 0; |
| 14854 | symhdr->issMax = 0; |
| 14855 | symhdr->issExtMax = 0; |
| 14856 | symhdr->ifdMax = 0; |
| 14857 | symhdr->crfd = 0; |
| 14858 | symhdr->iextMax = 0; |
| 14859 | |
| 14860 | /* We accumulate the debugging information itself in the |
| 14861 | debug_info structure. */ |
| 14862 | debug.line = NULL; |
| 14863 | debug.external_dnr = NULL; |
| 14864 | debug.external_pdr = NULL; |
| 14865 | debug.external_sym = NULL; |
| 14866 | debug.external_opt = NULL; |
| 14867 | debug.external_aux = NULL; |
| 14868 | debug.ss = NULL; |
| 14869 | debug.ssext = debug.ssext_end = NULL; |
| 14870 | debug.external_fdr = NULL; |
| 14871 | debug.external_rfd = NULL; |
| 14872 | debug.external_ext = debug.external_ext_end = NULL; |
| 14873 | |
| 14874 | mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); |
| 14875 | if (mdebug_handle == NULL) |
| 14876 | return FALSE; |
| 14877 | |
| 14878 | esym.jmptbl = 0; |
| 14879 | esym.cobol_main = 0; |
| 14880 | esym.weakext = 0; |
| 14881 | esym.reserved = 0; |
| 14882 | esym.ifd = ifdNil; |
| 14883 | esym.asym.iss = issNil; |
| 14884 | esym.asym.st = stLocal; |
| 14885 | esym.asym.reserved = 0; |
| 14886 | esym.asym.index = indexNil; |
| 14887 | last = 0; |
| 14888 | for (i = 0; i < sizeof (secname) / sizeof (secname[0]); i++) |
| 14889 | { |
| 14890 | esym.asym.sc = sc[i]; |
| 14891 | s = bfd_get_section_by_name (abfd, secname[i]); |
| 14892 | if (s != NULL) |
| 14893 | { |
| 14894 | esym.asym.value = s->vma; |
| 14895 | last = s->vma + s->size; |
| 14896 | } |
| 14897 | else |
| 14898 | esym.asym.value = last; |
| 14899 | if (!bfd_ecoff_debug_one_external (abfd, &debug, swap, |
| 14900 | secname[i], &esym)) |
| 14901 | return FALSE; |
| 14902 | } |
| 14903 | |
| 14904 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
| 14905 | { |
| 14906 | asection *input_section; |
| 14907 | bfd *input_bfd; |
| 14908 | const struct ecoff_debug_swap *input_swap; |
| 14909 | struct ecoff_debug_info input_debug; |
| 14910 | char *eraw_src; |
| 14911 | char *eraw_end; |
| 14912 | |
| 14913 | if (p->type != bfd_indirect_link_order) |
| 14914 | { |
| 14915 | if (p->type == bfd_data_link_order) |
| 14916 | continue; |
| 14917 | abort (); |
| 14918 | } |
| 14919 | |
| 14920 | input_section = p->u.indirect.section; |
| 14921 | input_bfd = input_section->owner; |
| 14922 | |
| 14923 | if (!is_mips_elf (input_bfd)) |
| 14924 | { |
| 14925 | /* I don't know what a non MIPS ELF bfd would be |
| 14926 | doing with a .mdebug section, but I don't really |
| 14927 | want to deal with it. */ |
| 14928 | continue; |
| 14929 | } |
| 14930 | |
| 14931 | input_swap = (get_elf_backend_data (input_bfd) |
| 14932 | ->elf_backend_ecoff_debug_swap); |
| 14933 | |
| 14934 | BFD_ASSERT (p->size == input_section->size); |
| 14935 | |
| 14936 | /* The ECOFF linking code expects that we have already |
| 14937 | read in the debugging information and set up an |
| 14938 | ecoff_debug_info structure, so we do that now. */ |
| 14939 | if (! _bfd_mips_elf_read_ecoff_info (input_bfd, input_section, |
| 14940 | &input_debug)) |
| 14941 | return FALSE; |
| 14942 | |
| 14943 | if (! (bfd_ecoff_debug_accumulate |
| 14944 | (mdebug_handle, abfd, &debug, swap, input_bfd, |
| 14945 | &input_debug, input_swap, info))) |
| 14946 | return FALSE; |
| 14947 | |
| 14948 | /* Loop through the external symbols. For each one with |
| 14949 | interesting information, try to find the symbol in |
| 14950 | the linker global hash table and save the information |
| 14951 | for the output external symbols. */ |
| 14952 | eraw_src = input_debug.external_ext; |
| 14953 | eraw_end = (eraw_src |
| 14954 | + (input_debug.symbolic_header.iextMax |
| 14955 | * input_swap->external_ext_size)); |
| 14956 | for (; |
| 14957 | eraw_src < eraw_end; |
| 14958 | eraw_src += input_swap->external_ext_size) |
| 14959 | { |
| 14960 | EXTR ext; |
| 14961 | const char *name; |
| 14962 | struct mips_elf_link_hash_entry *h; |
| 14963 | |
| 14964 | (*input_swap->swap_ext_in) (input_bfd, eraw_src, &ext); |
| 14965 | if (ext.asym.sc == scNil |
| 14966 | || ext.asym.sc == scUndefined |
| 14967 | || ext.asym.sc == scSUndefined) |
| 14968 | continue; |
| 14969 | |
| 14970 | name = input_debug.ssext + ext.asym.iss; |
| 14971 | h = mips_elf_link_hash_lookup (mips_elf_hash_table (info), |
| 14972 | name, FALSE, FALSE, TRUE); |
| 14973 | if (h == NULL || h->esym.ifd != -2) |
| 14974 | continue; |
| 14975 | |
| 14976 | if (ext.ifd != -1) |
| 14977 | { |
| 14978 | BFD_ASSERT (ext.ifd |
| 14979 | < input_debug.symbolic_header.ifdMax); |
| 14980 | ext.ifd = input_debug.ifdmap[ext.ifd]; |
| 14981 | } |
| 14982 | |
| 14983 | h->esym = ext; |
| 14984 | } |
| 14985 | |
| 14986 | /* Free up the information we just read. */ |
| 14987 | free (input_debug.line); |
| 14988 | free (input_debug.external_dnr); |
| 14989 | free (input_debug.external_pdr); |
| 14990 | free (input_debug.external_sym); |
| 14991 | free (input_debug.external_opt); |
| 14992 | free (input_debug.external_aux); |
| 14993 | free (input_debug.ss); |
| 14994 | free (input_debug.ssext); |
| 14995 | free (input_debug.external_fdr); |
| 14996 | free (input_debug.external_rfd); |
| 14997 | free (input_debug.external_ext); |
| 14998 | |
| 14999 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 15000 | elf_link_input_bfd ignores this section. */ |
| 15001 | input_section->flags &= ~SEC_HAS_CONTENTS; |
| 15002 | } |
| 15003 | |
| 15004 | if (SGI_COMPAT (abfd) && bfd_link_pic (info)) |
| 15005 | { |
| 15006 | /* Create .rtproc section. */ |
| 15007 | rtproc_sec = bfd_get_linker_section (abfd, ".rtproc"); |
| 15008 | if (rtproc_sec == NULL) |
| 15009 | { |
| 15010 | flagword flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 15011 | | SEC_LINKER_CREATED | SEC_READONLY); |
| 15012 | |
| 15013 | rtproc_sec = bfd_make_section_anyway_with_flags (abfd, |
| 15014 | ".rtproc", |
| 15015 | flags); |
| 15016 | if (rtproc_sec == NULL |
| 15017 | || !bfd_set_section_alignment (rtproc_sec, 4)) |
| 15018 | return FALSE; |
| 15019 | } |
| 15020 | |
| 15021 | if (! mips_elf_create_procedure_table (mdebug_handle, abfd, |
| 15022 | info, rtproc_sec, |
| 15023 | &debug)) |
| 15024 | return FALSE; |
| 15025 | } |
| 15026 | |
| 15027 | /* Build the external symbol information. */ |
| 15028 | einfo.abfd = abfd; |
| 15029 | einfo.info = info; |
| 15030 | einfo.debug = &debug; |
| 15031 | einfo.swap = swap; |
| 15032 | einfo.failed = FALSE; |
| 15033 | mips_elf_link_hash_traverse (mips_elf_hash_table (info), |
| 15034 | mips_elf_output_extsym, &einfo); |
| 15035 | if (einfo.failed) |
| 15036 | return FALSE; |
| 15037 | |
| 15038 | /* Set the size of the .mdebug section. */ |
| 15039 | o->size = bfd_ecoff_debug_size (abfd, &debug, swap); |
| 15040 | |
| 15041 | /* Skip this section later on (I don't think this currently |
| 15042 | matters, but someday it might). */ |
| 15043 | o->map_head.link_order = NULL; |
| 15044 | |
| 15045 | mdebug_sec = o; |
| 15046 | } |
| 15047 | |
| 15048 | if (CONST_STRNEQ (o->name, ".gptab.")) |
| 15049 | { |
| 15050 | const char *subname; |
| 15051 | unsigned int c; |
| 15052 | Elf32_gptab *tab; |
| 15053 | Elf32_External_gptab *ext_tab; |
| 15054 | unsigned int j; |
| 15055 | |
| 15056 | /* The .gptab.sdata and .gptab.sbss sections hold |
| 15057 | information describing how the small data area would |
| 15058 | change depending upon the -G switch. These sections |
| 15059 | not used in executables files. */ |
| 15060 | if (! bfd_link_relocatable (info)) |
| 15061 | { |
| 15062 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
| 15063 | { |
| 15064 | asection *input_section; |
| 15065 | |
| 15066 | if (p->type != bfd_indirect_link_order) |
| 15067 | { |
| 15068 | if (p->type == bfd_data_link_order) |
| 15069 | continue; |
| 15070 | abort (); |
| 15071 | } |
| 15072 | |
| 15073 | input_section = p->u.indirect.section; |
| 15074 | |
| 15075 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 15076 | elf_link_input_bfd ignores this section. */ |
| 15077 | input_section->flags &= ~SEC_HAS_CONTENTS; |
| 15078 | } |
| 15079 | |
| 15080 | /* Skip this section later on (I don't think this |
| 15081 | currently matters, but someday it might). */ |
| 15082 | o->map_head.link_order = NULL; |
| 15083 | |
| 15084 | /* Really remove the section. */ |
| 15085 | bfd_section_list_remove (abfd, o); |
| 15086 | --abfd->section_count; |
| 15087 | |
| 15088 | continue; |
| 15089 | } |
| 15090 | |
| 15091 | /* There is one gptab for initialized data, and one for |
| 15092 | uninitialized data. */ |
| 15093 | if (strcmp (o->name, ".gptab.sdata") == 0) |
| 15094 | gptab_data_sec = o; |
| 15095 | else if (strcmp (o->name, ".gptab.sbss") == 0) |
| 15096 | gptab_bss_sec = o; |
| 15097 | else |
| 15098 | { |
| 15099 | _bfd_error_handler |
| 15100 | /* xgettext:c-format */ |
| 15101 | (_("%pB: illegal section name `%pA'"), abfd, o); |
| 15102 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 15103 | return FALSE; |
| 15104 | } |
| 15105 | |
| 15106 | /* The linker script always combines .gptab.data and |
| 15107 | .gptab.sdata into .gptab.sdata, and likewise for |
| 15108 | .gptab.bss and .gptab.sbss. It is possible that there is |
| 15109 | no .sdata or .sbss section in the output file, in which |
| 15110 | case we must change the name of the output section. */ |
| 15111 | subname = o->name + sizeof ".gptab" - 1; |
| 15112 | if (bfd_get_section_by_name (abfd, subname) == NULL) |
| 15113 | { |
| 15114 | if (o == gptab_data_sec) |
| 15115 | o->name = ".gptab.data"; |
| 15116 | else |
| 15117 | o->name = ".gptab.bss"; |
| 15118 | subname = o->name + sizeof ".gptab" - 1; |
| 15119 | BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL); |
| 15120 | } |
| 15121 | |
| 15122 | /* Set up the first entry. */ |
| 15123 | c = 1; |
| 15124 | amt = c * sizeof (Elf32_gptab); |
| 15125 | tab = bfd_malloc (amt); |
| 15126 | if (tab == NULL) |
| 15127 | return FALSE; |
| 15128 | tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd); |
| 15129 | tab[0].gt_header.gt_unused = 0; |
| 15130 | |
| 15131 | /* Combine the input sections. */ |
| 15132 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
| 15133 | { |
| 15134 | asection *input_section; |
| 15135 | bfd *input_bfd; |
| 15136 | bfd_size_type size; |
| 15137 | unsigned long last; |
| 15138 | bfd_size_type gpentry; |
| 15139 | |
| 15140 | if (p->type != bfd_indirect_link_order) |
| 15141 | { |
| 15142 | if (p->type == bfd_data_link_order) |
| 15143 | continue; |
| 15144 | abort (); |
| 15145 | } |
| 15146 | |
| 15147 | input_section = p->u.indirect.section; |
| 15148 | input_bfd = input_section->owner; |
| 15149 | |
| 15150 | /* Combine the gptab entries for this input section one |
| 15151 | by one. We know that the input gptab entries are |
| 15152 | sorted by ascending -G value. */ |
| 15153 | size = input_section->size; |
| 15154 | last = 0; |
| 15155 | for (gpentry = sizeof (Elf32_External_gptab); |
| 15156 | gpentry < size; |
| 15157 | gpentry += sizeof (Elf32_External_gptab)) |
| 15158 | { |
| 15159 | Elf32_External_gptab ext_gptab; |
| 15160 | Elf32_gptab int_gptab; |
| 15161 | unsigned long val; |
| 15162 | unsigned long add; |
| 15163 | bfd_boolean exact; |
| 15164 | unsigned int look; |
| 15165 | |
| 15166 | if (! (bfd_get_section_contents |
| 15167 | (input_bfd, input_section, &ext_gptab, gpentry, |
| 15168 | sizeof (Elf32_External_gptab)))) |
| 15169 | { |
| 15170 | free (tab); |
| 15171 | return FALSE; |
| 15172 | } |
| 15173 | |
| 15174 | bfd_mips_elf32_swap_gptab_in (input_bfd, &ext_gptab, |
| 15175 | &int_gptab); |
| 15176 | val = int_gptab.gt_entry.gt_g_value; |
| 15177 | add = int_gptab.gt_entry.gt_bytes - last; |
| 15178 | |
| 15179 | exact = FALSE; |
| 15180 | for (look = 1; look < c; look++) |
| 15181 | { |
| 15182 | if (tab[look].gt_entry.gt_g_value >= val) |
| 15183 | tab[look].gt_entry.gt_bytes += add; |
| 15184 | |
| 15185 | if (tab[look].gt_entry.gt_g_value == val) |
| 15186 | exact = TRUE; |
| 15187 | } |
| 15188 | |
| 15189 | if (! exact) |
| 15190 | { |
| 15191 | Elf32_gptab *new_tab; |
| 15192 | unsigned int max; |
| 15193 | |
| 15194 | /* We need a new table entry. */ |
| 15195 | amt = (bfd_size_type) (c + 1) * sizeof (Elf32_gptab); |
| 15196 | new_tab = bfd_realloc (tab, amt); |
| 15197 | if (new_tab == NULL) |
| 15198 | { |
| 15199 | free (tab); |
| 15200 | return FALSE; |
| 15201 | } |
| 15202 | tab = new_tab; |
| 15203 | tab[c].gt_entry.gt_g_value = val; |
| 15204 | tab[c].gt_entry.gt_bytes = add; |
| 15205 | |
| 15206 | /* Merge in the size for the next smallest -G |
| 15207 | value, since that will be implied by this new |
| 15208 | value. */ |
| 15209 | max = 0; |
| 15210 | for (look = 1; look < c; look++) |
| 15211 | { |
| 15212 | if (tab[look].gt_entry.gt_g_value < val |
| 15213 | && (max == 0 |
| 15214 | || (tab[look].gt_entry.gt_g_value |
| 15215 | > tab[max].gt_entry.gt_g_value))) |
| 15216 | max = look; |
| 15217 | } |
| 15218 | if (max != 0) |
| 15219 | tab[c].gt_entry.gt_bytes += |
| 15220 | tab[max].gt_entry.gt_bytes; |
| 15221 | |
| 15222 | ++c; |
| 15223 | } |
| 15224 | |
| 15225 | last = int_gptab.gt_entry.gt_bytes; |
| 15226 | } |
| 15227 | |
| 15228 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 15229 | elf_link_input_bfd ignores this section. */ |
| 15230 | input_section->flags &= ~SEC_HAS_CONTENTS; |
| 15231 | } |
| 15232 | |
| 15233 | /* The table must be sorted by -G value. */ |
| 15234 | if (c > 2) |
| 15235 | qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare); |
| 15236 | |
| 15237 | /* Swap out the table. */ |
| 15238 | amt = (bfd_size_type) c * sizeof (Elf32_External_gptab); |
| 15239 | ext_tab = bfd_alloc (abfd, amt); |
| 15240 | if (ext_tab == NULL) |
| 15241 | { |
| 15242 | free (tab); |
| 15243 | return FALSE; |
| 15244 | } |
| 15245 | |
| 15246 | for (j = 0; j < c; j++) |
| 15247 | bfd_mips_elf32_swap_gptab_out (abfd, tab + j, ext_tab + j); |
| 15248 | free (tab); |
| 15249 | |
| 15250 | o->size = c * sizeof (Elf32_External_gptab); |
| 15251 | o->contents = (bfd_byte *) ext_tab; |
| 15252 | |
| 15253 | /* Skip this section later on (I don't think this currently |
| 15254 | matters, but someday it might). */ |
| 15255 | o->map_head.link_order = NULL; |
| 15256 | } |
| 15257 | } |
| 15258 | |
| 15259 | /* Invoke the regular ELF backend linker to do all the work. */ |
| 15260 | if (!bfd_elf_final_link (abfd, info)) |
| 15261 | return FALSE; |
| 15262 | |
| 15263 | /* Now write out the computed sections. */ |
| 15264 | |
| 15265 | if (abiflags_sec != NULL) |
| 15266 | { |
| 15267 | Elf_External_ABIFlags_v0 ext; |
| 15268 | Elf_Internal_ABIFlags_v0 *abiflags; |
| 15269 | |
| 15270 | abiflags = &mips_elf_tdata (abfd)->abiflags; |
| 15271 | |
| 15272 | /* Set up the abiflags if no valid input sections were found. */ |
| 15273 | if (!mips_elf_tdata (abfd)->abiflags_valid) |
| 15274 | { |
| 15275 | infer_mips_abiflags (abfd, abiflags); |
| 15276 | mips_elf_tdata (abfd)->abiflags_valid = TRUE; |
| 15277 | } |
| 15278 | bfd_mips_elf_swap_abiflags_v0_out (abfd, abiflags, &ext); |
| 15279 | if (! bfd_set_section_contents (abfd, abiflags_sec, &ext, 0, sizeof ext)) |
| 15280 | return FALSE; |
| 15281 | } |
| 15282 | |
| 15283 | if (reginfo_sec != NULL) |
| 15284 | { |
| 15285 | Elf32_External_RegInfo ext; |
| 15286 | |
| 15287 | bfd_mips_elf32_swap_reginfo_out (abfd, ®info, &ext); |
| 15288 | if (! bfd_set_section_contents (abfd, reginfo_sec, &ext, 0, sizeof ext)) |
| 15289 | return FALSE; |
| 15290 | } |
| 15291 | |
| 15292 | if (mdebug_sec != NULL) |
| 15293 | { |
| 15294 | BFD_ASSERT (abfd->output_has_begun); |
| 15295 | if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, |
| 15296 | swap, info, |
| 15297 | mdebug_sec->filepos)) |
| 15298 | return FALSE; |
| 15299 | |
| 15300 | bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); |
| 15301 | } |
| 15302 | |
| 15303 | if (gptab_data_sec != NULL) |
| 15304 | { |
| 15305 | if (! bfd_set_section_contents (abfd, gptab_data_sec, |
| 15306 | gptab_data_sec->contents, |
| 15307 | 0, gptab_data_sec->size)) |
| 15308 | return FALSE; |
| 15309 | } |
| 15310 | |
| 15311 | if (gptab_bss_sec != NULL) |
| 15312 | { |
| 15313 | if (! bfd_set_section_contents (abfd, gptab_bss_sec, |
| 15314 | gptab_bss_sec->contents, |
| 15315 | 0, gptab_bss_sec->size)) |
| 15316 | return FALSE; |
| 15317 | } |
| 15318 | |
| 15319 | if (SGI_COMPAT (abfd)) |
| 15320 | { |
| 15321 | rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc"); |
| 15322 | if (rtproc_sec != NULL) |
| 15323 | { |
| 15324 | if (! bfd_set_section_contents (abfd, rtproc_sec, |
| 15325 | rtproc_sec->contents, |
| 15326 | 0, rtproc_sec->size)) |
| 15327 | return FALSE; |
| 15328 | } |
| 15329 | } |
| 15330 | |
| 15331 | return TRUE; |
| 15332 | } |
| 15333 | \f |
| 15334 | /* Merge object file header flags from IBFD into OBFD. Raise an error |
| 15335 | if there are conflicting settings. */ |
| 15336 | |
| 15337 | static bfd_boolean |
| 15338 | mips_elf_merge_obj_e_flags (bfd *ibfd, struct bfd_link_info *info) |
| 15339 | { |
| 15340 | bfd *obfd = info->output_bfd; |
| 15341 | struct mips_elf_obj_tdata *out_tdata = mips_elf_tdata (obfd); |
| 15342 | flagword old_flags; |
| 15343 | flagword new_flags; |
| 15344 | bfd_boolean ok; |
| 15345 | |
| 15346 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 15347 | elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_NOREORDER; |
| 15348 | old_flags = elf_elfheader (obfd)->e_flags; |
| 15349 | |
| 15350 | /* Check flag compatibility. */ |
| 15351 | |
| 15352 | new_flags &= ~EF_MIPS_NOREORDER; |
| 15353 | old_flags &= ~EF_MIPS_NOREORDER; |
| 15354 | |
| 15355 | /* Some IRIX 6 BSD-compatibility objects have this bit set. It |
| 15356 | doesn't seem to matter. */ |
| 15357 | new_flags &= ~EF_MIPS_XGOT; |
| 15358 | old_flags &= ~EF_MIPS_XGOT; |
| 15359 | |
| 15360 | /* MIPSpro generates ucode info in n64 objects. Again, we should |
| 15361 | just be able to ignore this. */ |
| 15362 | new_flags &= ~EF_MIPS_UCODE; |
| 15363 | old_flags &= ~EF_MIPS_UCODE; |
| 15364 | |
| 15365 | /* DSOs should only be linked with CPIC code. */ |
| 15366 | if ((ibfd->flags & DYNAMIC) != 0) |
| 15367 | new_flags |= EF_MIPS_PIC | EF_MIPS_CPIC; |
| 15368 | |
| 15369 | if (new_flags == old_flags) |
| 15370 | return TRUE; |
| 15371 | |
| 15372 | ok = TRUE; |
| 15373 | |
| 15374 | if (((new_flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) != 0) |
| 15375 | != ((old_flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) != 0)) |
| 15376 | { |
| 15377 | _bfd_error_handler |
| 15378 | (_("%pB: warning: linking abicalls files with non-abicalls files"), |
| 15379 | ibfd); |
| 15380 | ok = TRUE; |
| 15381 | } |
| 15382 | |
| 15383 | if (new_flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) |
| 15384 | elf_elfheader (obfd)->e_flags |= EF_MIPS_CPIC; |
| 15385 | if (! (new_flags & EF_MIPS_PIC)) |
| 15386 | elf_elfheader (obfd)->e_flags &= ~EF_MIPS_PIC; |
| 15387 | |
| 15388 | new_flags &= ~ (EF_MIPS_PIC | EF_MIPS_CPIC); |
| 15389 | old_flags &= ~ (EF_MIPS_PIC | EF_MIPS_CPIC); |
| 15390 | |
| 15391 | /* Compare the ISAs. */ |
| 15392 | if (mips_32bit_flags_p (old_flags) != mips_32bit_flags_p (new_flags)) |
| 15393 | { |
| 15394 | _bfd_error_handler |
| 15395 | (_("%pB: linking 32-bit code with 64-bit code"), |
| 15396 | ibfd); |
| 15397 | ok = FALSE; |
| 15398 | } |
| 15399 | else if (!mips_mach_extends_p (bfd_get_mach (ibfd), bfd_get_mach (obfd))) |
| 15400 | { |
| 15401 | /* OBFD's ISA isn't the same as, or an extension of, IBFD's. */ |
| 15402 | if (mips_mach_extends_p (bfd_get_mach (obfd), bfd_get_mach (ibfd))) |
| 15403 | { |
| 15404 | /* Copy the architecture info from IBFD to OBFD. Also copy |
| 15405 | the 32-bit flag (if set) so that we continue to recognise |
| 15406 | OBFD as a 32-bit binary. */ |
| 15407 | bfd_set_arch_info (obfd, bfd_get_arch_info (ibfd)); |
| 15408 | elf_elfheader (obfd)->e_flags &= ~(EF_MIPS_ARCH | EF_MIPS_MACH); |
| 15409 | elf_elfheader (obfd)->e_flags |
| 15410 | |= new_flags & (EF_MIPS_ARCH | EF_MIPS_MACH | EF_MIPS_32BITMODE); |
| 15411 | |
| 15412 | /* Update the ABI flags isa_level, isa_rev, isa_ext fields. */ |
| 15413 | update_mips_abiflags_isa (obfd, &out_tdata->abiflags); |
| 15414 | |
| 15415 | /* Copy across the ABI flags if OBFD doesn't use them |
| 15416 | and if that was what caused us to treat IBFD as 32-bit. */ |
| 15417 | if ((old_flags & EF_MIPS_ABI) == 0 |
| 15418 | && mips_32bit_flags_p (new_flags) |
| 15419 | && !mips_32bit_flags_p (new_flags & ~EF_MIPS_ABI)) |
| 15420 | elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_ABI; |
| 15421 | } |
| 15422 | else |
| 15423 | { |
| 15424 | /* The ISAs aren't compatible. */ |
| 15425 | _bfd_error_handler |
| 15426 | /* xgettext:c-format */ |
| 15427 | (_("%pB: linking %s module with previous %s modules"), |
| 15428 | ibfd, |
| 15429 | bfd_printable_name (ibfd), |
| 15430 | bfd_printable_name (obfd)); |
| 15431 | ok = FALSE; |
| 15432 | } |
| 15433 | } |
| 15434 | |
| 15435 | new_flags &= ~(EF_MIPS_ARCH | EF_MIPS_MACH | EF_MIPS_32BITMODE); |
| 15436 | old_flags &= ~(EF_MIPS_ARCH | EF_MIPS_MACH | EF_MIPS_32BITMODE); |
| 15437 | |
| 15438 | /* Compare ABIs. The 64-bit ABI does not use EF_MIPS_ABI. But, it |
| 15439 | does set EI_CLASS differently from any 32-bit ABI. */ |
| 15440 | if ((new_flags & EF_MIPS_ABI) != (old_flags & EF_MIPS_ABI) |
| 15441 | || (elf_elfheader (ibfd)->e_ident[EI_CLASS] |
| 15442 | != elf_elfheader (obfd)->e_ident[EI_CLASS])) |
| 15443 | { |
| 15444 | /* Only error if both are set (to different values). */ |
| 15445 | if (((new_flags & EF_MIPS_ABI) && (old_flags & EF_MIPS_ABI)) |
| 15446 | || (elf_elfheader (ibfd)->e_ident[EI_CLASS] |
| 15447 | != elf_elfheader (obfd)->e_ident[EI_CLASS])) |
| 15448 | { |
| 15449 | _bfd_error_handler |
| 15450 | /* xgettext:c-format */ |
| 15451 | (_("%pB: ABI mismatch: linking %s module with previous %s modules"), |
| 15452 | ibfd, |
| 15453 | elf_mips_abi_name (ibfd), |
| 15454 | elf_mips_abi_name (obfd)); |
| 15455 | ok = FALSE; |
| 15456 | } |
| 15457 | new_flags &= ~EF_MIPS_ABI; |
| 15458 | old_flags &= ~EF_MIPS_ABI; |
| 15459 | } |
| 15460 | |
| 15461 | /* Compare ASEs. Forbid linking MIPS16 and microMIPS ASE modules together |
| 15462 | and allow arbitrary mixing of the remaining ASEs (retain the union). */ |
| 15463 | if ((new_flags & EF_MIPS_ARCH_ASE) != (old_flags & EF_MIPS_ARCH_ASE)) |
| 15464 | { |
| 15465 | int old_micro = old_flags & EF_MIPS_ARCH_ASE_MICROMIPS; |
| 15466 | int new_micro = new_flags & EF_MIPS_ARCH_ASE_MICROMIPS; |
| 15467 | int old_m16 = old_flags & EF_MIPS_ARCH_ASE_M16; |
| 15468 | int new_m16 = new_flags & EF_MIPS_ARCH_ASE_M16; |
| 15469 | int micro_mis = old_m16 && new_micro; |
| 15470 | int m16_mis = old_micro && new_m16; |
| 15471 | |
| 15472 | if (m16_mis || micro_mis) |
| 15473 | { |
| 15474 | _bfd_error_handler |
| 15475 | /* xgettext:c-format */ |
| 15476 | (_("%pB: ASE mismatch: linking %s module with previous %s modules"), |
| 15477 | ibfd, |
| 15478 | m16_mis ? "MIPS16" : "microMIPS", |
| 15479 | m16_mis ? "microMIPS" : "MIPS16"); |
| 15480 | ok = FALSE; |
| 15481 | } |
| 15482 | |
| 15483 | elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_ARCH_ASE; |
| 15484 | |
| 15485 | new_flags &= ~ EF_MIPS_ARCH_ASE; |
| 15486 | old_flags &= ~ EF_MIPS_ARCH_ASE; |
| 15487 | } |
| 15488 | |
| 15489 | /* Compare NaN encodings. */ |
| 15490 | if ((new_flags & EF_MIPS_NAN2008) != (old_flags & EF_MIPS_NAN2008)) |
| 15491 | { |
| 15492 | /* xgettext:c-format */ |
| 15493 | _bfd_error_handler (_("%pB: linking %s module with previous %s modules"), |
| 15494 | ibfd, |
| 15495 | (new_flags & EF_MIPS_NAN2008 |
| 15496 | ? "-mnan=2008" : "-mnan=legacy"), |
| 15497 | (old_flags & EF_MIPS_NAN2008 |
| 15498 | ? "-mnan=2008" : "-mnan=legacy")); |
| 15499 | ok = FALSE; |
| 15500 | new_flags &= ~EF_MIPS_NAN2008; |
| 15501 | old_flags &= ~EF_MIPS_NAN2008; |
| 15502 | } |
| 15503 | |
| 15504 | /* Compare FP64 state. */ |
| 15505 | if ((new_flags & EF_MIPS_FP64) != (old_flags & EF_MIPS_FP64)) |
| 15506 | { |
| 15507 | /* xgettext:c-format */ |
| 15508 | _bfd_error_handler (_("%pB: linking %s module with previous %s modules"), |
| 15509 | ibfd, |
| 15510 | (new_flags & EF_MIPS_FP64 |
| 15511 | ? "-mfp64" : "-mfp32"), |
| 15512 | (old_flags & EF_MIPS_FP64 |
| 15513 | ? "-mfp64" : "-mfp32")); |
| 15514 | ok = FALSE; |
| 15515 | new_flags &= ~EF_MIPS_FP64; |
| 15516 | old_flags &= ~EF_MIPS_FP64; |
| 15517 | } |
| 15518 | |
| 15519 | /* Warn about any other mismatches */ |
| 15520 | if (new_flags != old_flags) |
| 15521 | { |
| 15522 | /* xgettext:c-format */ |
| 15523 | _bfd_error_handler |
| 15524 | (_("%pB: uses different e_flags (%#x) fields than previous modules " |
| 15525 | "(%#x)"), |
| 15526 | ibfd, new_flags, old_flags); |
| 15527 | ok = FALSE; |
| 15528 | } |
| 15529 | |
| 15530 | return ok; |
| 15531 | } |
| 15532 | |
| 15533 | /* Merge object attributes from IBFD into OBFD. Raise an error if |
| 15534 | there are conflicting attributes. */ |
| 15535 | static bfd_boolean |
| 15536 | mips_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info) |
| 15537 | { |
| 15538 | bfd *obfd = info->output_bfd; |
| 15539 | obj_attribute *in_attr; |
| 15540 | obj_attribute *out_attr; |
| 15541 | bfd *abi_fp_bfd; |
| 15542 | bfd *abi_msa_bfd; |
| 15543 | |
| 15544 | abi_fp_bfd = mips_elf_tdata (obfd)->abi_fp_bfd; |
| 15545 | in_attr = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; |
| 15546 | if (!abi_fp_bfd && in_attr[Tag_GNU_MIPS_ABI_FP].i != Val_GNU_MIPS_ABI_FP_ANY) |
| 15547 | mips_elf_tdata (obfd)->abi_fp_bfd = ibfd; |
| 15548 | |
| 15549 | abi_msa_bfd = mips_elf_tdata (obfd)->abi_msa_bfd; |
| 15550 | if (!abi_msa_bfd |
| 15551 | && in_attr[Tag_GNU_MIPS_ABI_MSA].i != Val_GNU_MIPS_ABI_MSA_ANY) |
| 15552 | mips_elf_tdata (obfd)->abi_msa_bfd = ibfd; |
| 15553 | |
| 15554 | if (!elf_known_obj_attributes_proc (obfd)[0].i) |
| 15555 | { |
| 15556 | /* This is the first object. Copy the attributes. */ |
| 15557 | _bfd_elf_copy_obj_attributes (ibfd, obfd); |
| 15558 | |
| 15559 | /* Use the Tag_null value to indicate the attributes have been |
| 15560 | initialized. */ |
| 15561 | elf_known_obj_attributes_proc (obfd)[0].i = 1; |
| 15562 | |
| 15563 | return TRUE; |
| 15564 | } |
| 15565 | |
| 15566 | /* Check for conflicting Tag_GNU_MIPS_ABI_FP attributes and merge |
| 15567 | non-conflicting ones. */ |
| 15568 | out_attr = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; |
| 15569 | if (in_attr[Tag_GNU_MIPS_ABI_FP].i != out_attr[Tag_GNU_MIPS_ABI_FP].i) |
| 15570 | { |
| 15571 | int out_fp, in_fp; |
| 15572 | |
| 15573 | out_fp = out_attr[Tag_GNU_MIPS_ABI_FP].i; |
| 15574 | in_fp = in_attr[Tag_GNU_MIPS_ABI_FP].i; |
| 15575 | out_attr[Tag_GNU_MIPS_ABI_FP].type = 1; |
| 15576 | if (out_fp == Val_GNU_MIPS_ABI_FP_ANY) |
| 15577 | out_attr[Tag_GNU_MIPS_ABI_FP].i = in_fp; |
| 15578 | else if (out_fp == Val_GNU_MIPS_ABI_FP_XX |
| 15579 | && (in_fp == Val_GNU_MIPS_ABI_FP_DOUBLE |
| 15580 | || in_fp == Val_GNU_MIPS_ABI_FP_64 |
| 15581 | || in_fp == Val_GNU_MIPS_ABI_FP_64A)) |
| 15582 | { |
| 15583 | mips_elf_tdata (obfd)->abi_fp_bfd = ibfd; |
| 15584 | out_attr[Tag_GNU_MIPS_ABI_FP].i = in_attr[Tag_GNU_MIPS_ABI_FP].i; |
| 15585 | } |
| 15586 | else if (in_fp == Val_GNU_MIPS_ABI_FP_XX |
| 15587 | && (out_fp == Val_GNU_MIPS_ABI_FP_DOUBLE |
| 15588 | || out_fp == Val_GNU_MIPS_ABI_FP_64 |
| 15589 | || out_fp == Val_GNU_MIPS_ABI_FP_64A)) |
| 15590 | /* Keep the current setting. */; |
| 15591 | else if (out_fp == Val_GNU_MIPS_ABI_FP_64A |
| 15592 | && in_fp == Val_GNU_MIPS_ABI_FP_64) |
| 15593 | { |
| 15594 | mips_elf_tdata (obfd)->abi_fp_bfd = ibfd; |
| 15595 | out_attr[Tag_GNU_MIPS_ABI_FP].i = in_attr[Tag_GNU_MIPS_ABI_FP].i; |
| 15596 | } |
| 15597 | else if (in_fp == Val_GNU_MIPS_ABI_FP_64A |
| 15598 | && out_fp == Val_GNU_MIPS_ABI_FP_64) |
| 15599 | /* Keep the current setting. */; |
| 15600 | else if (in_fp != Val_GNU_MIPS_ABI_FP_ANY) |
| 15601 | { |
| 15602 | const char *out_string, *in_string; |
| 15603 | |
| 15604 | out_string = _bfd_mips_fp_abi_string (out_fp); |
| 15605 | in_string = _bfd_mips_fp_abi_string (in_fp); |
| 15606 | /* First warn about cases involving unrecognised ABIs. */ |
| 15607 | if (!out_string && !in_string) |
| 15608 | /* xgettext:c-format */ |
| 15609 | _bfd_error_handler |
| 15610 | (_("warning: %pB uses unknown floating point ABI %d " |
| 15611 | "(set by %pB), %pB uses unknown floating point ABI %d"), |
| 15612 | obfd, out_fp, abi_fp_bfd, ibfd, in_fp); |
| 15613 | else if (!out_string) |
| 15614 | _bfd_error_handler |
| 15615 | /* xgettext:c-format */ |
| 15616 | (_("warning: %pB uses unknown floating point ABI %d " |
| 15617 | "(set by %pB), %pB uses %s"), |
| 15618 | obfd, out_fp, abi_fp_bfd, ibfd, in_string); |
| 15619 | else if (!in_string) |
| 15620 | _bfd_error_handler |
| 15621 | /* xgettext:c-format */ |
| 15622 | (_("warning: %pB uses %s (set by %pB), " |
| 15623 | "%pB uses unknown floating point ABI %d"), |
| 15624 | obfd, out_string, abi_fp_bfd, ibfd, in_fp); |
| 15625 | else |
| 15626 | { |
| 15627 | /* If one of the bfds is soft-float, the other must be |
| 15628 | hard-float. The exact choice of hard-float ABI isn't |
| 15629 | really relevant to the error message. */ |
| 15630 | if (in_fp == Val_GNU_MIPS_ABI_FP_SOFT) |
| 15631 | out_string = "-mhard-float"; |
| 15632 | else if (out_fp == Val_GNU_MIPS_ABI_FP_SOFT) |
| 15633 | in_string = "-mhard-float"; |
| 15634 | _bfd_error_handler |
| 15635 | /* xgettext:c-format */ |
| 15636 | (_("warning: %pB uses %s (set by %pB), %pB uses %s"), |
| 15637 | obfd, out_string, abi_fp_bfd, ibfd, in_string); |
| 15638 | } |
| 15639 | } |
| 15640 | } |
| 15641 | |
| 15642 | /* Check for conflicting Tag_GNU_MIPS_ABI_MSA attributes and merge |
| 15643 | non-conflicting ones. */ |
| 15644 | if (in_attr[Tag_GNU_MIPS_ABI_MSA].i != out_attr[Tag_GNU_MIPS_ABI_MSA].i) |
| 15645 | { |
| 15646 | out_attr[Tag_GNU_MIPS_ABI_MSA].type = 1; |
| 15647 | if (out_attr[Tag_GNU_MIPS_ABI_MSA].i == Val_GNU_MIPS_ABI_MSA_ANY) |
| 15648 | out_attr[Tag_GNU_MIPS_ABI_MSA].i = in_attr[Tag_GNU_MIPS_ABI_MSA].i; |
| 15649 | else if (in_attr[Tag_GNU_MIPS_ABI_MSA].i != Val_GNU_MIPS_ABI_MSA_ANY) |
| 15650 | switch (out_attr[Tag_GNU_MIPS_ABI_MSA].i) |
| 15651 | { |
| 15652 | case Val_GNU_MIPS_ABI_MSA_128: |
| 15653 | _bfd_error_handler |
| 15654 | /* xgettext:c-format */ |
| 15655 | (_("warning: %pB uses %s (set by %pB), " |
| 15656 | "%pB uses unknown MSA ABI %d"), |
| 15657 | obfd, "-mmsa", abi_msa_bfd, |
| 15658 | ibfd, in_attr[Tag_GNU_MIPS_ABI_MSA].i); |
| 15659 | break; |
| 15660 | |
| 15661 | default: |
| 15662 | switch (in_attr[Tag_GNU_MIPS_ABI_MSA].i) |
| 15663 | { |
| 15664 | case Val_GNU_MIPS_ABI_MSA_128: |
| 15665 | _bfd_error_handler |
| 15666 | /* xgettext:c-format */ |
| 15667 | (_("warning: %pB uses unknown MSA ABI %d " |
| 15668 | "(set by %pB), %pB uses %s"), |
| 15669 | obfd, out_attr[Tag_GNU_MIPS_ABI_MSA].i, |
| 15670 | abi_msa_bfd, ibfd, "-mmsa"); |
| 15671 | break; |
| 15672 | |
| 15673 | default: |
| 15674 | _bfd_error_handler |
| 15675 | /* xgettext:c-format */ |
| 15676 | (_("warning: %pB uses unknown MSA ABI %d " |
| 15677 | "(set by %pB), %pB uses unknown MSA ABI %d"), |
| 15678 | obfd, out_attr[Tag_GNU_MIPS_ABI_MSA].i, |
| 15679 | abi_msa_bfd, ibfd, in_attr[Tag_GNU_MIPS_ABI_MSA].i); |
| 15680 | break; |
| 15681 | } |
| 15682 | } |
| 15683 | } |
| 15684 | |
| 15685 | /* Merge Tag_compatibility attributes and any common GNU ones. */ |
| 15686 | return _bfd_elf_merge_object_attributes (ibfd, info); |
| 15687 | } |
| 15688 | |
| 15689 | /* Merge object ABI flags from IBFD into OBFD. Raise an error if |
| 15690 | there are conflicting settings. */ |
| 15691 | |
| 15692 | static bfd_boolean |
| 15693 | mips_elf_merge_obj_abiflags (bfd *ibfd, bfd *obfd) |
| 15694 | { |
| 15695 | obj_attribute *out_attr = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; |
| 15696 | struct mips_elf_obj_tdata *out_tdata = mips_elf_tdata (obfd); |
| 15697 | struct mips_elf_obj_tdata *in_tdata = mips_elf_tdata (ibfd); |
| 15698 | |
| 15699 | /* Update the output abiflags fp_abi using the computed fp_abi. */ |
| 15700 | out_tdata->abiflags.fp_abi = out_attr[Tag_GNU_MIPS_ABI_FP].i; |
| 15701 | |
| 15702 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
| 15703 | /* Merge abiflags. */ |
| 15704 | out_tdata->abiflags.isa_level = max (out_tdata->abiflags.isa_level, |
| 15705 | in_tdata->abiflags.isa_level); |
| 15706 | out_tdata->abiflags.isa_rev = max (out_tdata->abiflags.isa_rev, |
| 15707 | in_tdata->abiflags.isa_rev); |
| 15708 | out_tdata->abiflags.gpr_size = max (out_tdata->abiflags.gpr_size, |
| 15709 | in_tdata->abiflags.gpr_size); |
| 15710 | out_tdata->abiflags.cpr1_size = max (out_tdata->abiflags.cpr1_size, |
| 15711 | in_tdata->abiflags.cpr1_size); |
| 15712 | out_tdata->abiflags.cpr2_size = max (out_tdata->abiflags.cpr2_size, |
| 15713 | in_tdata->abiflags.cpr2_size); |
| 15714 | #undef max |
| 15715 | out_tdata->abiflags.ases |= in_tdata->abiflags.ases; |
| 15716 | out_tdata->abiflags.flags1 |= in_tdata->abiflags.flags1; |
| 15717 | |
| 15718 | return TRUE; |
| 15719 | } |
| 15720 | |
| 15721 | /* Merge backend specific data from an object file to the output |
| 15722 | object file when linking. */ |
| 15723 | |
| 15724 | bfd_boolean |
| 15725 | _bfd_mips_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 15726 | { |
| 15727 | bfd *obfd = info->output_bfd; |
| 15728 | struct mips_elf_obj_tdata *out_tdata; |
| 15729 | struct mips_elf_obj_tdata *in_tdata; |
| 15730 | bfd_boolean null_input_bfd = TRUE; |
| 15731 | asection *sec; |
| 15732 | bfd_boolean ok; |
| 15733 | |
| 15734 | /* Check if we have the same endianness. */ |
| 15735 | if (! _bfd_generic_verify_endian_match (ibfd, info)) |
| 15736 | { |
| 15737 | _bfd_error_handler |
| 15738 | (_("%pB: endianness incompatible with that of the selected emulation"), |
| 15739 | ibfd); |
| 15740 | return FALSE; |
| 15741 | } |
| 15742 | |
| 15743 | if (!is_mips_elf (ibfd) || !is_mips_elf (obfd)) |
| 15744 | return TRUE; |
| 15745 | |
| 15746 | in_tdata = mips_elf_tdata (ibfd); |
| 15747 | out_tdata = mips_elf_tdata (obfd); |
| 15748 | |
| 15749 | if (strcmp (bfd_get_target (ibfd), bfd_get_target (obfd)) != 0) |
| 15750 | { |
| 15751 | _bfd_error_handler |
| 15752 | (_("%pB: ABI is incompatible with that of the selected emulation"), |
| 15753 | ibfd); |
| 15754 | return FALSE; |
| 15755 | } |
| 15756 | |
| 15757 | /* Check to see if the input BFD actually contains any sections. If not, |
| 15758 | then it has no attributes, and its flags may not have been initialized |
| 15759 | either, but it cannot actually cause any incompatibility. */ |
| 15760 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 15761 | { |
| 15762 | /* Ignore synthetic sections and empty .text, .data and .bss sections |
| 15763 | which are automatically generated by gas. Also ignore fake |
| 15764 | (s)common sections, since merely defining a common symbol does |
| 15765 | not affect compatibility. */ |
| 15766 | if ((sec->flags & SEC_IS_COMMON) == 0 |
| 15767 | && strcmp (sec->name, ".reginfo") |
| 15768 | && strcmp (sec->name, ".mdebug") |
| 15769 | && (sec->size != 0 |
| 15770 | || (strcmp (sec->name, ".text") |
| 15771 | && strcmp (sec->name, ".data") |
| 15772 | && strcmp (sec->name, ".bss")))) |
| 15773 | { |
| 15774 | null_input_bfd = FALSE; |
| 15775 | break; |
| 15776 | } |
| 15777 | } |
| 15778 | if (null_input_bfd) |
| 15779 | return TRUE; |
| 15780 | |
| 15781 | /* Populate abiflags using existing information. */ |
| 15782 | if (in_tdata->abiflags_valid) |
| 15783 | { |
| 15784 | obj_attribute *in_attr = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; |
| 15785 | Elf_Internal_ABIFlags_v0 in_abiflags; |
| 15786 | Elf_Internal_ABIFlags_v0 abiflags; |
| 15787 | |
| 15788 | /* Set up the FP ABI attribute from the abiflags if it is not already |
| 15789 | set. */ |
| 15790 | if (in_attr[Tag_GNU_MIPS_ABI_FP].i == Val_GNU_MIPS_ABI_FP_ANY) |
| 15791 | in_attr[Tag_GNU_MIPS_ABI_FP].i = in_tdata->abiflags.fp_abi; |
| 15792 | |
| 15793 | infer_mips_abiflags (ibfd, &abiflags); |
| 15794 | in_abiflags = in_tdata->abiflags; |
| 15795 | |
| 15796 | /* It is not possible to infer the correct ISA revision |
| 15797 | for R3 or R5 so drop down to R2 for the checks. */ |
| 15798 | if (in_abiflags.isa_rev == 3 || in_abiflags.isa_rev == 5) |
| 15799 | in_abiflags.isa_rev = 2; |
| 15800 | |
| 15801 | if (LEVEL_REV (in_abiflags.isa_level, in_abiflags.isa_rev) |
| 15802 | < LEVEL_REV (abiflags.isa_level, abiflags.isa_rev)) |
| 15803 | _bfd_error_handler |
| 15804 | (_("%pB: warning: inconsistent ISA between e_flags and " |
| 15805 | ".MIPS.abiflags"), ibfd); |
| 15806 | if (abiflags.fp_abi != Val_GNU_MIPS_ABI_FP_ANY |
| 15807 | && in_abiflags.fp_abi != abiflags.fp_abi) |
| 15808 | _bfd_error_handler |
| 15809 | (_("%pB: warning: inconsistent FP ABI between .gnu.attributes and " |
| 15810 | ".MIPS.abiflags"), ibfd); |
| 15811 | if ((in_abiflags.ases & abiflags.ases) != abiflags.ases) |
| 15812 | _bfd_error_handler |
| 15813 | (_("%pB: warning: inconsistent ASEs between e_flags and " |
| 15814 | ".MIPS.abiflags"), ibfd); |
| 15815 | /* The isa_ext is allowed to be an extension of what can be inferred |
| 15816 | from e_flags. */ |
| 15817 | if (!mips_mach_extends_p (bfd_mips_isa_ext_mach (abiflags.isa_ext), |
| 15818 | bfd_mips_isa_ext_mach (in_abiflags.isa_ext))) |
| 15819 | _bfd_error_handler |
| 15820 | (_("%pB: warning: inconsistent ISA extensions between e_flags and " |
| 15821 | ".MIPS.abiflags"), ibfd); |
| 15822 | if (in_abiflags.flags2 != 0) |
| 15823 | _bfd_error_handler |
| 15824 | (_("%pB: warning: unexpected flag in the flags2 field of " |
| 15825 | ".MIPS.abiflags (0x%lx)"), ibfd, |
| 15826 | in_abiflags.flags2); |
| 15827 | } |
| 15828 | else |
| 15829 | { |
| 15830 | infer_mips_abiflags (ibfd, &in_tdata->abiflags); |
| 15831 | in_tdata->abiflags_valid = TRUE; |
| 15832 | } |
| 15833 | |
| 15834 | if (!out_tdata->abiflags_valid) |
| 15835 | { |
| 15836 | /* Copy input abiflags if output abiflags are not already valid. */ |
| 15837 | out_tdata->abiflags = in_tdata->abiflags; |
| 15838 | out_tdata->abiflags_valid = TRUE; |
| 15839 | } |
| 15840 | |
| 15841 | if (! elf_flags_init (obfd)) |
| 15842 | { |
| 15843 | elf_flags_init (obfd) = TRUE; |
| 15844 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
| 15845 | elf_elfheader (obfd)->e_ident[EI_CLASS] |
| 15846 | = elf_elfheader (ibfd)->e_ident[EI_CLASS]; |
| 15847 | |
| 15848 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 15849 | && (bfd_get_arch_info (obfd)->the_default |
| 15850 | || mips_mach_extends_p (bfd_get_mach (obfd), |
| 15851 | bfd_get_mach (ibfd)))) |
| 15852 | { |
| 15853 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), |
| 15854 | bfd_get_mach (ibfd))) |
| 15855 | return FALSE; |
| 15856 | |
| 15857 | /* Update the ABI flags isa_level, isa_rev and isa_ext fields. */ |
| 15858 | update_mips_abiflags_isa (obfd, &out_tdata->abiflags); |
| 15859 | } |
| 15860 | |
| 15861 | ok = TRUE; |
| 15862 | } |
| 15863 | else |
| 15864 | ok = mips_elf_merge_obj_e_flags (ibfd, info); |
| 15865 | |
| 15866 | ok = mips_elf_merge_obj_attributes (ibfd, info) && ok; |
| 15867 | |
| 15868 | ok = mips_elf_merge_obj_abiflags (ibfd, obfd) && ok; |
| 15869 | |
| 15870 | if (!ok) |
| 15871 | { |
| 15872 | bfd_set_error (bfd_error_bad_value); |
| 15873 | return FALSE; |
| 15874 | } |
| 15875 | |
| 15876 | return TRUE; |
| 15877 | } |
| 15878 | |
| 15879 | /* Function to keep MIPS specific file flags like as EF_MIPS_PIC. */ |
| 15880 | |
| 15881 | bfd_boolean |
| 15882 | _bfd_mips_elf_set_private_flags (bfd *abfd, flagword flags) |
| 15883 | { |
| 15884 | BFD_ASSERT (!elf_flags_init (abfd) |
| 15885 | || elf_elfheader (abfd)->e_flags == flags); |
| 15886 | |
| 15887 | elf_elfheader (abfd)->e_flags = flags; |
| 15888 | elf_flags_init (abfd) = TRUE; |
| 15889 | return TRUE; |
| 15890 | } |
| 15891 | |
| 15892 | char * |
| 15893 | _bfd_mips_elf_get_target_dtag (bfd_vma dtag) |
| 15894 | { |
| 15895 | switch (dtag) |
| 15896 | { |
| 15897 | default: return ""; |
| 15898 | case DT_MIPS_RLD_VERSION: |
| 15899 | return "MIPS_RLD_VERSION"; |
| 15900 | case DT_MIPS_TIME_STAMP: |
| 15901 | return "MIPS_TIME_STAMP"; |
| 15902 | case DT_MIPS_ICHECKSUM: |
| 15903 | return "MIPS_ICHECKSUM"; |
| 15904 | case DT_MIPS_IVERSION: |
| 15905 | return "MIPS_IVERSION"; |
| 15906 | case DT_MIPS_FLAGS: |
| 15907 | return "MIPS_FLAGS"; |
| 15908 | case DT_MIPS_BASE_ADDRESS: |
| 15909 | return "MIPS_BASE_ADDRESS"; |
| 15910 | case DT_MIPS_MSYM: |
| 15911 | return "MIPS_MSYM"; |
| 15912 | case DT_MIPS_CONFLICT: |
| 15913 | return "MIPS_CONFLICT"; |
| 15914 | case DT_MIPS_LIBLIST: |
| 15915 | return "MIPS_LIBLIST"; |
| 15916 | case DT_MIPS_LOCAL_GOTNO: |
| 15917 | return "MIPS_LOCAL_GOTNO"; |
| 15918 | case DT_MIPS_CONFLICTNO: |
| 15919 | return "MIPS_CONFLICTNO"; |
| 15920 | case DT_MIPS_LIBLISTNO: |
| 15921 | return "MIPS_LIBLISTNO"; |
| 15922 | case DT_MIPS_SYMTABNO: |
| 15923 | return "MIPS_SYMTABNO"; |
| 15924 | case DT_MIPS_UNREFEXTNO: |
| 15925 | return "MIPS_UNREFEXTNO"; |
| 15926 | case DT_MIPS_GOTSYM: |
| 15927 | return "MIPS_GOTSYM"; |
| 15928 | case DT_MIPS_HIPAGENO: |
| 15929 | return "MIPS_HIPAGENO"; |
| 15930 | case DT_MIPS_RLD_MAP: |
| 15931 | return "MIPS_RLD_MAP"; |
| 15932 | case DT_MIPS_RLD_MAP_REL: |
| 15933 | return "MIPS_RLD_MAP_REL"; |
| 15934 | case DT_MIPS_DELTA_CLASS: |
| 15935 | return "MIPS_DELTA_CLASS"; |
| 15936 | case DT_MIPS_DELTA_CLASS_NO: |
| 15937 | return "MIPS_DELTA_CLASS_NO"; |
| 15938 | case DT_MIPS_DELTA_INSTANCE: |
| 15939 | return "MIPS_DELTA_INSTANCE"; |
| 15940 | case DT_MIPS_DELTA_INSTANCE_NO: |
| 15941 | return "MIPS_DELTA_INSTANCE_NO"; |
| 15942 | case DT_MIPS_DELTA_RELOC: |
| 15943 | return "MIPS_DELTA_RELOC"; |
| 15944 | case DT_MIPS_DELTA_RELOC_NO: |
| 15945 | return "MIPS_DELTA_RELOC_NO"; |
| 15946 | case DT_MIPS_DELTA_SYM: |
| 15947 | return "MIPS_DELTA_SYM"; |
| 15948 | case DT_MIPS_DELTA_SYM_NO: |
| 15949 | return "MIPS_DELTA_SYM_NO"; |
| 15950 | case DT_MIPS_DELTA_CLASSSYM: |
| 15951 | return "MIPS_DELTA_CLASSSYM"; |
| 15952 | case DT_MIPS_DELTA_CLASSSYM_NO: |
| 15953 | return "MIPS_DELTA_CLASSSYM_NO"; |
| 15954 | case DT_MIPS_CXX_FLAGS: |
| 15955 | return "MIPS_CXX_FLAGS"; |
| 15956 | case DT_MIPS_PIXIE_INIT: |
| 15957 | return "MIPS_PIXIE_INIT"; |
| 15958 | case DT_MIPS_SYMBOL_LIB: |
| 15959 | return "MIPS_SYMBOL_LIB"; |
| 15960 | case DT_MIPS_LOCALPAGE_GOTIDX: |
| 15961 | return "MIPS_LOCALPAGE_GOTIDX"; |
| 15962 | case DT_MIPS_LOCAL_GOTIDX: |
| 15963 | return "MIPS_LOCAL_GOTIDX"; |
| 15964 | case DT_MIPS_HIDDEN_GOTIDX: |
| 15965 | return "MIPS_HIDDEN_GOTIDX"; |
| 15966 | case DT_MIPS_PROTECTED_GOTIDX: |
| 15967 | return "MIPS_PROTECTED_GOT_IDX"; |
| 15968 | case DT_MIPS_OPTIONS: |
| 15969 | return "MIPS_OPTIONS"; |
| 15970 | case DT_MIPS_INTERFACE: |
| 15971 | return "MIPS_INTERFACE"; |
| 15972 | case DT_MIPS_DYNSTR_ALIGN: |
| 15973 | return "DT_MIPS_DYNSTR_ALIGN"; |
| 15974 | case DT_MIPS_INTERFACE_SIZE: |
| 15975 | return "DT_MIPS_INTERFACE_SIZE"; |
| 15976 | case DT_MIPS_RLD_TEXT_RESOLVE_ADDR: |
| 15977 | return "DT_MIPS_RLD_TEXT_RESOLVE_ADDR"; |
| 15978 | case DT_MIPS_PERF_SUFFIX: |
| 15979 | return "DT_MIPS_PERF_SUFFIX"; |
| 15980 | case DT_MIPS_COMPACT_SIZE: |
| 15981 | return "DT_MIPS_COMPACT_SIZE"; |
| 15982 | case DT_MIPS_GP_VALUE: |
| 15983 | return "DT_MIPS_GP_VALUE"; |
| 15984 | case DT_MIPS_AUX_DYNAMIC: |
| 15985 | return "DT_MIPS_AUX_DYNAMIC"; |
| 15986 | case DT_MIPS_PLTGOT: |
| 15987 | return "DT_MIPS_PLTGOT"; |
| 15988 | case DT_MIPS_RWPLT: |
| 15989 | return "DT_MIPS_RWPLT"; |
| 15990 | case DT_MIPS_XHASH: |
| 15991 | return "DT_MIPS_XHASH"; |
| 15992 | } |
| 15993 | } |
| 15994 | |
| 15995 | /* Return the meaning of Tag_GNU_MIPS_ABI_FP value FP, or null if |
| 15996 | not known. */ |
| 15997 | |
| 15998 | const char * |
| 15999 | _bfd_mips_fp_abi_string (int fp) |
| 16000 | { |
| 16001 | switch (fp) |
| 16002 | { |
| 16003 | /* These strings aren't translated because they're simply |
| 16004 | option lists. */ |
| 16005 | case Val_GNU_MIPS_ABI_FP_DOUBLE: |
| 16006 | return "-mdouble-float"; |
| 16007 | |
| 16008 | case Val_GNU_MIPS_ABI_FP_SINGLE: |
| 16009 | return "-msingle-float"; |
| 16010 | |
| 16011 | case Val_GNU_MIPS_ABI_FP_SOFT: |
| 16012 | return "-msoft-float"; |
| 16013 | |
| 16014 | case Val_GNU_MIPS_ABI_FP_OLD_64: |
| 16015 | return _("-mips32r2 -mfp64 (12 callee-saved)"); |
| 16016 | |
| 16017 | case Val_GNU_MIPS_ABI_FP_XX: |
| 16018 | return "-mfpxx"; |
| 16019 | |
| 16020 | case Val_GNU_MIPS_ABI_FP_64: |
| 16021 | return "-mgp32 -mfp64"; |
| 16022 | |
| 16023 | case Val_GNU_MIPS_ABI_FP_64A: |
| 16024 | return "-mgp32 -mfp64 -mno-odd-spreg"; |
| 16025 | |
| 16026 | default: |
| 16027 | return 0; |
| 16028 | } |
| 16029 | } |
| 16030 | |
| 16031 | static void |
| 16032 | print_mips_ases (FILE *file, unsigned int mask) |
| 16033 | { |
| 16034 | if (mask & AFL_ASE_DSP) |
| 16035 | fputs ("\n\tDSP ASE", file); |
| 16036 | if (mask & AFL_ASE_DSPR2) |
| 16037 | fputs ("\n\tDSP R2 ASE", file); |
| 16038 | if (mask & AFL_ASE_DSPR3) |
| 16039 | fputs ("\n\tDSP R3 ASE", file); |
| 16040 | if (mask & AFL_ASE_EVA) |
| 16041 | fputs ("\n\tEnhanced VA Scheme", file); |
| 16042 | if (mask & AFL_ASE_MCU) |
| 16043 | fputs ("\n\tMCU (MicroController) ASE", file); |
| 16044 | if (mask & AFL_ASE_MDMX) |
| 16045 | fputs ("\n\tMDMX ASE", file); |
| 16046 | if (mask & AFL_ASE_MIPS3D) |
| 16047 | fputs ("\n\tMIPS-3D ASE", file); |
| 16048 | if (mask & AFL_ASE_MT) |
| 16049 | fputs ("\n\tMT ASE", file); |
| 16050 | if (mask & AFL_ASE_SMARTMIPS) |
| 16051 | fputs ("\n\tSmartMIPS ASE", file); |
| 16052 | if (mask & AFL_ASE_VIRT) |
| 16053 | fputs ("\n\tVZ ASE", file); |
| 16054 | if (mask & AFL_ASE_MSA) |
| 16055 | fputs ("\n\tMSA ASE", file); |
| 16056 | if (mask & AFL_ASE_MIPS16) |
| 16057 | fputs ("\n\tMIPS16 ASE", file); |
| 16058 | if (mask & AFL_ASE_MICROMIPS) |
| 16059 | fputs ("\n\tMICROMIPS ASE", file); |
| 16060 | if (mask & AFL_ASE_XPA) |
| 16061 | fputs ("\n\tXPA ASE", file); |
| 16062 | if (mask & AFL_ASE_MIPS16E2) |
| 16063 | fputs ("\n\tMIPS16e2 ASE", file); |
| 16064 | if (mask & AFL_ASE_CRC) |
| 16065 | fputs ("\n\tCRC ASE", file); |
| 16066 | if (mask & AFL_ASE_GINV) |
| 16067 | fputs ("\n\tGINV ASE", file); |
| 16068 | if (mask & AFL_ASE_LOONGSON_MMI) |
| 16069 | fputs ("\n\tLoongson MMI ASE", file); |
| 16070 | if (mask & AFL_ASE_LOONGSON_CAM) |
| 16071 | fputs ("\n\tLoongson CAM ASE", file); |
| 16072 | if (mask & AFL_ASE_LOONGSON_EXT) |
| 16073 | fputs ("\n\tLoongson EXT ASE", file); |
| 16074 | if (mask & AFL_ASE_LOONGSON_EXT2) |
| 16075 | fputs ("\n\tLoongson EXT2 ASE", file); |
| 16076 | if (mask == 0) |
| 16077 | fprintf (file, "\n\t%s", _("None")); |
| 16078 | else if ((mask & ~AFL_ASE_MASK) != 0) |
| 16079 | fprintf (stdout, "\n\t%s (%x)", _("Unknown"), mask & ~AFL_ASE_MASK); |
| 16080 | } |
| 16081 | |
| 16082 | static void |
| 16083 | print_mips_isa_ext (FILE *file, unsigned int isa_ext) |
| 16084 | { |
| 16085 | switch (isa_ext) |
| 16086 | { |
| 16087 | case 0: |
| 16088 | fputs (_("None"), file); |
| 16089 | break; |
| 16090 | case AFL_EXT_XLR: |
| 16091 | fputs ("RMI XLR", file); |
| 16092 | break; |
| 16093 | case AFL_EXT_OCTEON3: |
| 16094 | fputs ("Cavium Networks Octeon3", file); |
| 16095 | break; |
| 16096 | case AFL_EXT_OCTEON2: |
| 16097 | fputs ("Cavium Networks Octeon2", file); |
| 16098 | break; |
| 16099 | case AFL_EXT_OCTEONP: |
| 16100 | fputs ("Cavium Networks OcteonP", file); |
| 16101 | break; |
| 16102 | case AFL_EXT_OCTEON: |
| 16103 | fputs ("Cavium Networks Octeon", file); |
| 16104 | break; |
| 16105 | case AFL_EXT_5900: |
| 16106 | fputs ("Toshiba R5900", file); |
| 16107 | break; |
| 16108 | case AFL_EXT_4650: |
| 16109 | fputs ("MIPS R4650", file); |
| 16110 | break; |
| 16111 | case AFL_EXT_4010: |
| 16112 | fputs ("LSI R4010", file); |
| 16113 | break; |
| 16114 | case AFL_EXT_4100: |
| 16115 | fputs ("NEC VR4100", file); |
| 16116 | break; |
| 16117 | case AFL_EXT_3900: |
| 16118 | fputs ("Toshiba R3900", file); |
| 16119 | break; |
| 16120 | case AFL_EXT_10000: |
| 16121 | fputs ("MIPS R10000", file); |
| 16122 | break; |
| 16123 | case AFL_EXT_SB1: |
| 16124 | fputs ("Broadcom SB-1", file); |
| 16125 | break; |
| 16126 | case AFL_EXT_4111: |
| 16127 | fputs ("NEC VR4111/VR4181", file); |
| 16128 | break; |
| 16129 | case AFL_EXT_4120: |
| 16130 | fputs ("NEC VR4120", file); |
| 16131 | break; |
| 16132 | case AFL_EXT_5400: |
| 16133 | fputs ("NEC VR5400", file); |
| 16134 | break; |
| 16135 | case AFL_EXT_5500: |
| 16136 | fputs ("NEC VR5500", file); |
| 16137 | break; |
| 16138 | case AFL_EXT_LOONGSON_2E: |
| 16139 | fputs ("ST Microelectronics Loongson 2E", file); |
| 16140 | break; |
| 16141 | case AFL_EXT_LOONGSON_2F: |
| 16142 | fputs ("ST Microelectronics Loongson 2F", file); |
| 16143 | break; |
| 16144 | case AFL_EXT_INTERAPTIV_MR2: |
| 16145 | fputs ("Imagination interAptiv MR2", file); |
| 16146 | break; |
| 16147 | default: |
| 16148 | fprintf (file, "%s (%d)", _("Unknown"), isa_ext); |
| 16149 | break; |
| 16150 | } |
| 16151 | } |
| 16152 | |
| 16153 | static void |
| 16154 | print_mips_fp_abi_value (FILE *file, int val) |
| 16155 | { |
| 16156 | switch (val) |
| 16157 | { |
| 16158 | case Val_GNU_MIPS_ABI_FP_ANY: |
| 16159 | fprintf (file, _("Hard or soft float\n")); |
| 16160 | break; |
| 16161 | case Val_GNU_MIPS_ABI_FP_DOUBLE: |
| 16162 | fprintf (file, _("Hard float (double precision)\n")); |
| 16163 | break; |
| 16164 | case Val_GNU_MIPS_ABI_FP_SINGLE: |
| 16165 | fprintf (file, _("Hard float (single precision)\n")); |
| 16166 | break; |
| 16167 | case Val_GNU_MIPS_ABI_FP_SOFT: |
| 16168 | fprintf (file, _("Soft float\n")); |
| 16169 | break; |
| 16170 | case Val_GNU_MIPS_ABI_FP_OLD_64: |
| 16171 | fprintf (file, _("Hard float (MIPS32r2 64-bit FPU 12 callee-saved)\n")); |
| 16172 | break; |
| 16173 | case Val_GNU_MIPS_ABI_FP_XX: |
| 16174 | fprintf (file, _("Hard float (32-bit CPU, Any FPU)\n")); |
| 16175 | break; |
| 16176 | case Val_GNU_MIPS_ABI_FP_64: |
| 16177 | fprintf (file, _("Hard float (32-bit CPU, 64-bit FPU)\n")); |
| 16178 | break; |
| 16179 | case Val_GNU_MIPS_ABI_FP_64A: |
| 16180 | fprintf (file, _("Hard float compat (32-bit CPU, 64-bit FPU)\n")); |
| 16181 | break; |
| 16182 | default: |
| 16183 | fprintf (file, "??? (%d)\n", val); |
| 16184 | break; |
| 16185 | } |
| 16186 | } |
| 16187 | |
| 16188 | static int |
| 16189 | get_mips_reg_size (int reg_size) |
| 16190 | { |
| 16191 | return (reg_size == AFL_REG_NONE) ? 0 |
| 16192 | : (reg_size == AFL_REG_32) ? 32 |
| 16193 | : (reg_size == AFL_REG_64) ? 64 |
| 16194 | : (reg_size == AFL_REG_128) ? 128 |
| 16195 | : -1; |
| 16196 | } |
| 16197 | |
| 16198 | bfd_boolean |
| 16199 | _bfd_mips_elf_print_private_bfd_data (bfd *abfd, void *ptr) |
| 16200 | { |
| 16201 | FILE *file = ptr; |
| 16202 | |
| 16203 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 16204 | |
| 16205 | /* Print normal ELF private data. */ |
| 16206 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 16207 | |
| 16208 | /* xgettext:c-format */ |
| 16209 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 16210 | |
| 16211 | if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_O32) |
| 16212 | fprintf (file, _(" [abi=O32]")); |
| 16213 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_O64) |
| 16214 | fprintf (file, _(" [abi=O64]")); |
| 16215 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI32) |
| 16216 | fprintf (file, _(" [abi=EABI32]")); |
| 16217 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI64) |
| 16218 | fprintf (file, _(" [abi=EABI64]")); |
| 16219 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI)) |
| 16220 | fprintf (file, _(" [abi unknown]")); |
| 16221 | else if (ABI_N32_P (abfd)) |
| 16222 | fprintf (file, _(" [abi=N32]")); |
| 16223 | else if (ABI_64_P (abfd)) |
| 16224 | fprintf (file, _(" [abi=64]")); |
| 16225 | else |
| 16226 | fprintf (file, _(" [no abi set]")); |
| 16227 | |
| 16228 | if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_1) |
| 16229 | fprintf (file, " [mips1]"); |
| 16230 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_2) |
| 16231 | fprintf (file, " [mips2]"); |
| 16232 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_3) |
| 16233 | fprintf (file, " [mips3]"); |
| 16234 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_4) |
| 16235 | fprintf (file, " [mips4]"); |
| 16236 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_5) |
| 16237 | fprintf (file, " [mips5]"); |
| 16238 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32) |
| 16239 | fprintf (file, " [mips32]"); |
| 16240 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_64) |
| 16241 | fprintf (file, " [mips64]"); |
| 16242 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32R2) |
| 16243 | fprintf (file, " [mips32r2]"); |
| 16244 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_64R2) |
| 16245 | fprintf (file, " [mips64r2]"); |
| 16246 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32R6) |
| 16247 | fprintf (file, " [mips32r6]"); |
| 16248 | else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_64R6) |
| 16249 | fprintf (file, " [mips64r6]"); |
| 16250 | else |
| 16251 | fprintf (file, _(" [unknown ISA]")); |
| 16252 | |
| 16253 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_MDMX) |
| 16254 | fprintf (file, " [mdmx]"); |
| 16255 | |
| 16256 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_M16) |
| 16257 | fprintf (file, " [mips16]"); |
| 16258 | |
| 16259 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH_ASE_MICROMIPS) |
| 16260 | fprintf (file, " [micromips]"); |
| 16261 | |
| 16262 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_NAN2008) |
| 16263 | fprintf (file, " [nan2008]"); |
| 16264 | |
| 16265 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_FP64) |
| 16266 | fprintf (file, " [old fp64]"); |
| 16267 | |
| 16268 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_32BITMODE) |
| 16269 | fprintf (file, " [32bitmode]"); |
| 16270 | else |
| 16271 | fprintf (file, _(" [not 32bitmode]")); |
| 16272 | |
| 16273 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_NOREORDER) |
| 16274 | fprintf (file, " [noreorder]"); |
| 16275 | |
| 16276 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_PIC) |
| 16277 | fprintf (file, " [PIC]"); |
| 16278 | |
| 16279 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_CPIC) |
| 16280 | fprintf (file, " [CPIC]"); |
| 16281 | |
| 16282 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_XGOT) |
| 16283 | fprintf (file, " [XGOT]"); |
| 16284 | |
| 16285 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_UCODE) |
| 16286 | fprintf (file, " [UCODE]"); |
| 16287 | |
| 16288 | fputc ('\n', file); |
| 16289 | |
| 16290 | if (mips_elf_tdata (abfd)->abiflags_valid) |
| 16291 | { |
| 16292 | Elf_Internal_ABIFlags_v0 *abiflags = &mips_elf_tdata (abfd)->abiflags; |
| 16293 | fprintf (file, "\nMIPS ABI Flags Version: %d\n", abiflags->version); |
| 16294 | fprintf (file, "\nISA: MIPS%d", abiflags->isa_level); |
| 16295 | if (abiflags->isa_rev > 1) |
| 16296 | fprintf (file, "r%d", abiflags->isa_rev); |
| 16297 | fprintf (file, "\nGPR size: %d", |
| 16298 | get_mips_reg_size (abiflags->gpr_size)); |
| 16299 | fprintf (file, "\nCPR1 size: %d", |
| 16300 | get_mips_reg_size (abiflags->cpr1_size)); |
| 16301 | fprintf (file, "\nCPR2 size: %d", |
| 16302 | get_mips_reg_size (abiflags->cpr2_size)); |
| 16303 | fputs ("\nFP ABI: ", file); |
| 16304 | print_mips_fp_abi_value (file, abiflags->fp_abi); |
| 16305 | fputs ("ISA Extension: ", file); |
| 16306 | print_mips_isa_ext (file, abiflags->isa_ext); |
| 16307 | fputs ("\nASEs:", file); |
| 16308 | print_mips_ases (file, abiflags->ases); |
| 16309 | fprintf (file, "\nFLAGS 1: %8.8lx", abiflags->flags1); |
| 16310 | fprintf (file, "\nFLAGS 2: %8.8lx", abiflags->flags2); |
| 16311 | fputc ('\n', file); |
| 16312 | } |
| 16313 | |
| 16314 | return TRUE; |
| 16315 | } |
| 16316 | |
| 16317 | const struct bfd_elf_special_section _bfd_mips_elf_special_sections[] = |
| 16318 | { |
| 16319 | { STRING_COMMA_LEN (".lit4"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL }, |
| 16320 | { STRING_COMMA_LEN (".lit8"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL }, |
| 16321 | { STRING_COMMA_LEN (".mdebug"), 0, SHT_MIPS_DEBUG, 0 }, |
| 16322 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL }, |
| 16323 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_MIPS_GPREL }, |
| 16324 | { STRING_COMMA_LEN (".ucode"), 0, SHT_MIPS_UCODE, 0 }, |
| 16325 | { STRING_COMMA_LEN (".MIPS.xhash"), 0, SHT_MIPS_XHASH, SHF_ALLOC }, |
| 16326 | { NULL, 0, 0, 0, 0 } |
| 16327 | }; |
| 16328 | |
| 16329 | /* Merge non visibility st_other attributes. Ensure that the |
| 16330 | STO_OPTIONAL flag is copied into h->other, even if this is not a |
| 16331 | definiton of the symbol. */ |
| 16332 | void |
| 16333 | _bfd_mips_elf_merge_symbol_attribute (struct elf_link_hash_entry *h, |
| 16334 | const Elf_Internal_Sym *isym, |
| 16335 | bfd_boolean definition, |
| 16336 | bfd_boolean dynamic ATTRIBUTE_UNUSED) |
| 16337 | { |
| 16338 | if ((isym->st_other & ~ELF_ST_VISIBILITY (-1)) != 0) |
| 16339 | { |
| 16340 | unsigned char other; |
| 16341 | |
| 16342 | other = (definition ? isym->st_other : h->other); |
| 16343 | other &= ~ELF_ST_VISIBILITY (-1); |
| 16344 | h->other = other | ELF_ST_VISIBILITY (h->other); |
| 16345 | } |
| 16346 | |
| 16347 | if (!definition |
| 16348 | && ELF_MIPS_IS_OPTIONAL (isym->st_other)) |
| 16349 | h->other |= STO_OPTIONAL; |
| 16350 | } |
| 16351 | |
| 16352 | /* Decide whether an undefined symbol is special and can be ignored. |
| 16353 | This is the case for OPTIONAL symbols on IRIX. */ |
| 16354 | bfd_boolean |
| 16355 | _bfd_mips_elf_ignore_undef_symbol (struct elf_link_hash_entry *h) |
| 16356 | { |
| 16357 | return ELF_MIPS_IS_OPTIONAL (h->other) ? TRUE : FALSE; |
| 16358 | } |
| 16359 | |
| 16360 | bfd_boolean |
| 16361 | _bfd_mips_elf_common_definition (Elf_Internal_Sym *sym) |
| 16362 | { |
| 16363 | return (sym->st_shndx == SHN_COMMON |
| 16364 | || sym->st_shndx == SHN_MIPS_ACOMMON |
| 16365 | || sym->st_shndx == SHN_MIPS_SCOMMON); |
| 16366 | } |
| 16367 | |
| 16368 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 16369 | or (bfd_vma) -1 if it should not be included. */ |
| 16370 | |
| 16371 | bfd_vma |
| 16372 | _bfd_mips_elf_plt_sym_val (bfd_vma i, const asection *plt, |
| 16373 | const arelent *rel ATTRIBUTE_UNUSED) |
| 16374 | { |
| 16375 | return (plt->vma |
| 16376 | + 4 * ARRAY_SIZE (mips_o32_exec_plt0_entry) |
| 16377 | + i * 4 * ARRAY_SIZE (mips_exec_plt_entry)); |
| 16378 | } |
| 16379 | |
| 16380 | /* Build a table of synthetic symbols to represent the PLT. As with MIPS16 |
| 16381 | and microMIPS PLT slots we may have a many-to-one mapping between .plt |
| 16382 | and .got.plt and also the slots may be of a different size each we walk |
| 16383 | the PLT manually fetching instructions and matching them against known |
| 16384 | patterns. To make things easier standard MIPS slots, if any, always come |
| 16385 | first. As we don't create proper ELF symbols we use the UDATA.I member |
| 16386 | of ASYMBOL to carry ISA annotation. The encoding used is the same as |
| 16387 | with the ST_OTHER member of the ELF symbol. */ |
| 16388 | |
| 16389 | long |
| 16390 | _bfd_mips_elf_get_synthetic_symtab (bfd *abfd, |
| 16391 | long symcount ATTRIBUTE_UNUSED, |
| 16392 | asymbol **syms ATTRIBUTE_UNUSED, |
| 16393 | long dynsymcount, asymbol **dynsyms, |
| 16394 | asymbol **ret) |
| 16395 | { |
| 16396 | static const char pltname[] = "_PROCEDURE_LINKAGE_TABLE_"; |
| 16397 | static const char microsuffix[] = "@micromipsplt"; |
| 16398 | static const char m16suffix[] = "@mips16plt"; |
| 16399 | static const char mipssuffix[] = "@plt"; |
| 16400 | |
| 16401 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
| 16402 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 16403 | bfd_boolean micromips_p = MICROMIPS_P (abfd); |
| 16404 | Elf_Internal_Shdr *hdr; |
| 16405 | bfd_byte *plt_data; |
| 16406 | bfd_vma plt_offset; |
| 16407 | unsigned int other; |
| 16408 | bfd_vma entry_size; |
| 16409 | bfd_vma plt0_size; |
| 16410 | asection *relplt; |
| 16411 | bfd_vma opcode; |
| 16412 | asection *plt; |
| 16413 | asymbol *send; |
| 16414 | size_t size; |
| 16415 | char *names; |
| 16416 | long counti; |
| 16417 | arelent *p; |
| 16418 | asymbol *s; |
| 16419 | char *nend; |
| 16420 | long count; |
| 16421 | long pi; |
| 16422 | long i; |
| 16423 | long n; |
| 16424 | |
| 16425 | *ret = NULL; |
| 16426 | |
| 16427 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0 || dynsymcount <= 0) |
| 16428 | return 0; |
| 16429 | |
| 16430 | relplt = bfd_get_section_by_name (abfd, ".rel.plt"); |
| 16431 | if (relplt == NULL) |
| 16432 | return 0; |
| 16433 | |
| 16434 | hdr = &elf_section_data (relplt)->this_hdr; |
| 16435 | if (hdr->sh_link != elf_dynsymtab (abfd) || hdr->sh_type != SHT_REL) |
| 16436 | return 0; |
| 16437 | |
| 16438 | plt = bfd_get_section_by_name (abfd, ".plt"); |
| 16439 | if (plt == NULL) |
| 16440 | return 0; |
| 16441 | |
| 16442 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
| 16443 | if (!(*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) |
| 16444 | return -1; |
| 16445 | p = relplt->relocation; |
| 16446 | |
| 16447 | /* Calculating the exact amount of space required for symbols would |
| 16448 | require two passes over the PLT, so just pessimise assuming two |
| 16449 | PLT slots per relocation. */ |
| 16450 | count = relplt->size / hdr->sh_entsize; |
| 16451 | counti = count * bed->s->int_rels_per_ext_rel; |
| 16452 | size = 2 * count * sizeof (asymbol); |
| 16453 | size += count * (sizeof (mipssuffix) + |
| 16454 | (micromips_p ? sizeof (microsuffix) : sizeof (m16suffix))); |
| 16455 | for (pi = 0; pi < counti; pi += bed->s->int_rels_per_ext_rel) |
| 16456 | size += 2 * strlen ((*p[pi].sym_ptr_ptr)->name); |
| 16457 | |
| 16458 | /* Add the size of "_PROCEDURE_LINKAGE_TABLE_" too. */ |
| 16459 | size += sizeof (asymbol) + sizeof (pltname); |
| 16460 | |
| 16461 | if (!bfd_malloc_and_get_section (abfd, plt, &plt_data)) |
| 16462 | return -1; |
| 16463 | |
| 16464 | if (plt->size < 16) |
| 16465 | return -1; |
| 16466 | |
| 16467 | s = *ret = bfd_malloc (size); |
| 16468 | if (s == NULL) |
| 16469 | return -1; |
| 16470 | send = s + 2 * count + 1; |
| 16471 | |
| 16472 | names = (char *) send; |
| 16473 | nend = (char *) s + size; |
| 16474 | n = 0; |
| 16475 | |
| 16476 | opcode = bfd_get_micromips_32 (abfd, plt_data + 12); |
| 16477 | if (opcode == 0x3302fffe) |
| 16478 | { |
| 16479 | if (!micromips_p) |
| 16480 | return -1; |
| 16481 | plt0_size = 2 * ARRAY_SIZE (micromips_o32_exec_plt0_entry); |
| 16482 | other = STO_MICROMIPS; |
| 16483 | } |
| 16484 | else if (opcode == 0x0398c1d0) |
| 16485 | { |
| 16486 | if (!micromips_p) |
| 16487 | return -1; |
| 16488 | plt0_size = 2 * ARRAY_SIZE (micromips_insn32_o32_exec_plt0_entry); |
| 16489 | other = STO_MICROMIPS; |
| 16490 | } |
| 16491 | else |
| 16492 | { |
| 16493 | plt0_size = 4 * ARRAY_SIZE (mips_o32_exec_plt0_entry); |
| 16494 | other = 0; |
| 16495 | } |
| 16496 | |
| 16497 | s->the_bfd = abfd; |
| 16498 | s->flags = BSF_SYNTHETIC | BSF_FUNCTION | BSF_LOCAL; |
| 16499 | s->section = plt; |
| 16500 | s->value = 0; |
| 16501 | s->name = names; |
| 16502 | s->udata.i = other; |
| 16503 | memcpy (names, pltname, sizeof (pltname)); |
| 16504 | names += sizeof (pltname); |
| 16505 | ++s, ++n; |
| 16506 | |
| 16507 | pi = 0; |
| 16508 | for (plt_offset = plt0_size; |
| 16509 | plt_offset + 8 <= plt->size && s < send; |
| 16510 | plt_offset += entry_size) |
| 16511 | { |
| 16512 | bfd_vma gotplt_addr; |
| 16513 | const char *suffix; |
| 16514 | bfd_vma gotplt_hi; |
| 16515 | bfd_vma gotplt_lo; |
| 16516 | size_t suffixlen; |
| 16517 | |
| 16518 | opcode = bfd_get_micromips_32 (abfd, plt_data + plt_offset + 4); |
| 16519 | |
| 16520 | /* Check if the second word matches the expected MIPS16 instruction. */ |
| 16521 | if (opcode == 0x651aeb00) |
| 16522 | { |
| 16523 | if (micromips_p) |
| 16524 | return -1; |
| 16525 | /* Truncated table??? */ |
| 16526 | if (plt_offset + 16 > plt->size) |
| 16527 | break; |
| 16528 | gotplt_addr = bfd_get_32 (abfd, plt_data + plt_offset + 12); |
| 16529 | entry_size = 2 * ARRAY_SIZE (mips16_o32_exec_plt_entry); |
| 16530 | suffixlen = sizeof (m16suffix); |
| 16531 | suffix = m16suffix; |
| 16532 | other = STO_MIPS16; |
| 16533 | } |
| 16534 | /* Likewise the expected microMIPS instruction (no insn32 mode). */ |
| 16535 | else if (opcode == 0xff220000) |
| 16536 | { |
| 16537 | if (!micromips_p) |
| 16538 | return -1; |
| 16539 | gotplt_hi = bfd_get_16 (abfd, plt_data + plt_offset) & 0x7f; |
| 16540 | gotplt_lo = bfd_get_16 (abfd, plt_data + plt_offset + 2) & 0xffff; |
| 16541 | gotplt_hi = ((gotplt_hi ^ 0x40) - 0x40) << 18; |
| 16542 | gotplt_lo <<= 2; |
| 16543 | gotplt_addr = gotplt_hi + gotplt_lo; |
| 16544 | gotplt_addr += ((plt->vma + plt_offset) | 3) ^ 3; |
| 16545 | entry_size = 2 * ARRAY_SIZE (micromips_o32_exec_plt_entry); |
| 16546 | suffixlen = sizeof (microsuffix); |
| 16547 | suffix = microsuffix; |
| 16548 | other = STO_MICROMIPS; |
| 16549 | } |
| 16550 | /* Likewise the expected microMIPS instruction (insn32 mode). */ |
| 16551 | else if ((opcode & 0xffff0000) == 0xff2f0000) |
| 16552 | { |
| 16553 | gotplt_hi = bfd_get_16 (abfd, plt_data + plt_offset + 2) & 0xffff; |
| 16554 | gotplt_lo = bfd_get_16 (abfd, plt_data + plt_offset + 6) & 0xffff; |
| 16555 | gotplt_hi = ((gotplt_hi ^ 0x8000) - 0x8000) << 16; |
| 16556 | gotplt_lo = (gotplt_lo ^ 0x8000) - 0x8000; |
| 16557 | gotplt_addr = gotplt_hi + gotplt_lo; |
| 16558 | entry_size = 2 * ARRAY_SIZE (micromips_insn32_o32_exec_plt_entry); |
| 16559 | suffixlen = sizeof (microsuffix); |
| 16560 | suffix = microsuffix; |
| 16561 | other = STO_MICROMIPS; |
| 16562 | } |
| 16563 | /* Otherwise assume standard MIPS code. */ |
| 16564 | else |
| 16565 | { |
| 16566 | gotplt_hi = bfd_get_32 (abfd, plt_data + plt_offset) & 0xffff; |
| 16567 | gotplt_lo = bfd_get_32 (abfd, plt_data + plt_offset + 4) & 0xffff; |
| 16568 | gotplt_hi = ((gotplt_hi ^ 0x8000) - 0x8000) << 16; |
| 16569 | gotplt_lo = (gotplt_lo ^ 0x8000) - 0x8000; |
| 16570 | gotplt_addr = gotplt_hi + gotplt_lo; |
| 16571 | entry_size = 4 * ARRAY_SIZE (mips_exec_plt_entry); |
| 16572 | suffixlen = sizeof (mipssuffix); |
| 16573 | suffix = mipssuffix; |
| 16574 | other = 0; |
| 16575 | } |
| 16576 | /* Truncated table??? */ |
| 16577 | if (plt_offset + entry_size > plt->size) |
| 16578 | break; |
| 16579 | |
| 16580 | for (i = 0; |
| 16581 | i < count && p[pi].address != gotplt_addr; |
| 16582 | i++, pi = (pi + bed->s->int_rels_per_ext_rel) % counti); |
| 16583 | |
| 16584 | if (i < count) |
| 16585 | { |
| 16586 | size_t namelen; |
| 16587 | size_t len; |
| 16588 | |
| 16589 | *s = **p[pi].sym_ptr_ptr; |
| 16590 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since |
| 16591 | we are defining a symbol, ensure one of them is set. */ |
| 16592 | if ((s->flags & BSF_LOCAL) == 0) |
| 16593 | s->flags |= BSF_GLOBAL; |
| 16594 | s->flags |= BSF_SYNTHETIC; |
| 16595 | s->section = plt; |
| 16596 | s->value = plt_offset; |
| 16597 | s->name = names; |
| 16598 | s->udata.i = other; |
| 16599 | |
| 16600 | len = strlen ((*p[pi].sym_ptr_ptr)->name); |
| 16601 | namelen = len + suffixlen; |
| 16602 | if (names + namelen > nend) |
| 16603 | break; |
| 16604 | |
| 16605 | memcpy (names, (*p[pi].sym_ptr_ptr)->name, len); |
| 16606 | names += len; |
| 16607 | memcpy (names, suffix, suffixlen); |
| 16608 | names += suffixlen; |
| 16609 | |
| 16610 | ++s, ++n; |
| 16611 | pi = (pi + bed->s->int_rels_per_ext_rel) % counti; |
| 16612 | } |
| 16613 | } |
| 16614 | |
| 16615 | free (plt_data); |
| 16616 | |
| 16617 | return n; |
| 16618 | } |
| 16619 | |
| 16620 | /* Return the ABI flags associated with ABFD if available. */ |
| 16621 | |
| 16622 | Elf_Internal_ABIFlags_v0 * |
| 16623 | bfd_mips_elf_get_abiflags (bfd *abfd) |
| 16624 | { |
| 16625 | struct mips_elf_obj_tdata *tdata = mips_elf_tdata (abfd); |
| 16626 | |
| 16627 | return tdata->abiflags_valid ? &tdata->abiflags : NULL; |
| 16628 | } |
| 16629 | |
| 16630 | /* MIPS libc ABI versions, used with the EI_ABIVERSION ELF file header |
| 16631 | field. Taken from `libc-abis.h' generated at GNU libc build time. |
| 16632 | Using a MIPS_ prefix as other libc targets use different values. */ |
| 16633 | enum |
| 16634 | { |
| 16635 | MIPS_LIBC_ABI_DEFAULT = 0, |
| 16636 | MIPS_LIBC_ABI_MIPS_PLT, |
| 16637 | MIPS_LIBC_ABI_UNIQUE, |
| 16638 | MIPS_LIBC_ABI_MIPS_O32_FP64, |
| 16639 | MIPS_LIBC_ABI_ABSOLUTE, |
| 16640 | MIPS_LIBC_ABI_XHASH, |
| 16641 | MIPS_LIBC_ABI_MAX |
| 16642 | }; |
| 16643 | |
| 16644 | bfd_boolean |
| 16645 | _bfd_mips_init_file_header (bfd *abfd, struct bfd_link_info *link_info) |
| 16646 | { |
| 16647 | struct mips_elf_link_hash_table *htab = NULL; |
| 16648 | Elf_Internal_Ehdr *i_ehdrp; |
| 16649 | |
| 16650 | if (!_bfd_elf_init_file_header (abfd, link_info)) |
| 16651 | return FALSE; |
| 16652 | |
| 16653 | i_ehdrp = elf_elfheader (abfd); |
| 16654 | if (link_info) |
| 16655 | { |
| 16656 | htab = mips_elf_hash_table (link_info); |
| 16657 | BFD_ASSERT (htab != NULL); |
| 16658 | } |
| 16659 | |
| 16660 | if (htab != NULL && htab->use_plts_and_copy_relocs && !htab->is_vxworks) |
| 16661 | i_ehdrp->e_ident[EI_ABIVERSION] = MIPS_LIBC_ABI_MIPS_PLT; |
| 16662 | |
| 16663 | if (mips_elf_tdata (abfd)->abiflags.fp_abi == Val_GNU_MIPS_ABI_FP_64 |
| 16664 | || mips_elf_tdata (abfd)->abiflags.fp_abi == Val_GNU_MIPS_ABI_FP_64A) |
| 16665 | i_ehdrp->e_ident[EI_ABIVERSION] = MIPS_LIBC_ABI_MIPS_O32_FP64; |
| 16666 | |
| 16667 | /* Mark that we need support for absolute symbols in the dynamic loader. */ |
| 16668 | if (htab != NULL && htab->use_absolute_zero && htab->gnu_target) |
| 16669 | i_ehdrp->e_ident[EI_ABIVERSION] = MIPS_LIBC_ABI_ABSOLUTE; |
| 16670 | |
| 16671 | /* Mark that we need support for .MIPS.xhash in the dynamic linker, |
| 16672 | if it is the only hash section that will be created. */ |
| 16673 | if (link_info && link_info->emit_gnu_hash && !link_info->emit_hash) |
| 16674 | i_ehdrp->e_ident[EI_ABIVERSION] = MIPS_LIBC_ABI_XHASH; |
| 16675 | return TRUE; |
| 16676 | } |
| 16677 | |
| 16678 | int |
| 16679 | _bfd_mips_elf_compact_eh_encoding |
| 16680 | (struct bfd_link_info *link_info ATTRIBUTE_UNUSED) |
| 16681 | { |
| 16682 | return DW_EH_PE_pcrel | DW_EH_PE_sdata4; |
| 16683 | } |
| 16684 | |
| 16685 | /* Return the opcode for can't unwind. */ |
| 16686 | |
| 16687 | int |
| 16688 | _bfd_mips_elf_cant_unwind_opcode |
| 16689 | (struct bfd_link_info *link_info ATTRIBUTE_UNUSED) |
| 16690 | { |
| 16691 | return COMPACT_EH_CANT_UNWIND_OPCODE; |
| 16692 | } |
| 16693 | |
| 16694 | /* Record a position XLAT_LOC in the xlat translation table, associated with |
| 16695 | the hash entry H. The entry in the translation table will later be |
| 16696 | populated with the real symbol dynindx. */ |
| 16697 | |
| 16698 | void |
| 16699 | _bfd_mips_elf_record_xhash_symbol (struct elf_link_hash_entry *h, |
| 16700 | bfd_vma xlat_loc) |
| 16701 | { |
| 16702 | struct mips_elf_link_hash_entry *hmips; |
| 16703 | |
| 16704 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 16705 | hmips->mipsxhash_loc = xlat_loc; |
| 16706 | } |