| 1 | /* BFD back-end for HP PA-RISC ELF files. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | Original code by |
| 6 | Center for Software Science |
| 7 | Department of Computer Science |
| 8 | University of Utah |
| 9 | Largely rewritten by Alan Modra <alan@linuxcare.com.au> |
| 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 26 | |
| 27 | #include "bfd.h" |
| 28 | #include "sysdep.h" |
| 29 | #include "libbfd.h" |
| 30 | #include "elf-bfd.h" |
| 31 | #include "elf/hppa.h" |
| 32 | #include "libhppa.h" |
| 33 | #include "elf32-hppa.h" |
| 34 | #define ARCH_SIZE 32 |
| 35 | #include "elf-hppa.h" |
| 36 | #include "elf32-hppa.h" |
| 37 | |
| 38 | /* In order to gain some understanding of code in this file without |
| 39 | knowing all the intricate details of the linker, note the |
| 40 | following: |
| 41 | |
| 42 | Functions named elf32_hppa_* are called by external routines, other |
| 43 | functions are only called locally. elf32_hppa_* functions appear |
| 44 | in this file more or less in the order in which they are called |
| 45 | from external routines. eg. elf32_hppa_check_relocs is called |
| 46 | early in the link process, elf32_hppa_finish_dynamic_sections is |
| 47 | one of the last functions. */ |
| 48 | |
| 49 | /* We use two hash tables to hold information for linking PA ELF objects. |
| 50 | |
| 51 | The first is the elf32_hppa_link_hash_table which is derived |
| 52 | from the standard ELF linker hash table. We use this as a place to |
| 53 | attach other hash tables and static information. |
| 54 | |
| 55 | The second is the stub hash table which is derived from the |
| 56 | base BFD hash table. The stub hash table holds the information |
| 57 | necessary to build the linker stubs during a link. |
| 58 | |
| 59 | There are a number of different stubs generated by the linker. |
| 60 | |
| 61 | Long branch stub: |
| 62 | : ldil LR'X,%r1 |
| 63 | : be,n RR'X(%sr4,%r1) |
| 64 | |
| 65 | PIC long branch stub: |
| 66 | : b,l .+8,%r1 |
| 67 | : addil LR'X - ($PIC_pcrel$0 - 4),%r1 |
| 68 | : be,n RR'X - ($PIC_pcrel$0 - 8)(%sr4,%r1) |
| 69 | |
| 70 | Import stub to call shared library routine from normal object file |
| 71 | (single sub-space version) |
| 72 | : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point |
| 73 | : ldw RR'lt_ptr+ltoff(%r1),%r21 |
| 74 | : bv %r0(%r21) |
| 75 | : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value. |
| 76 | |
| 77 | Import stub to call shared library routine from shared library |
| 78 | (single sub-space version) |
| 79 | : addil LR'ltoff,%r19 ; get procedure entry point |
| 80 | : ldw RR'ltoff(%r1),%r21 |
| 81 | : bv %r0(%r21) |
| 82 | : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value. |
| 83 | |
| 84 | Import stub to call shared library routine from normal object file |
| 85 | (multiple sub-space support) |
| 86 | : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point |
| 87 | : ldw RR'lt_ptr+ltoff(%r1),%r21 |
| 88 | : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value. |
| 89 | : ldsid (%r21),%r1 |
| 90 | : mtsp %r1,%sr0 |
| 91 | : be 0(%sr0,%r21) ; branch to target |
| 92 | : stw %rp,-24(%sp) ; save rp |
| 93 | |
| 94 | Import stub to call shared library routine from shared library |
| 95 | (multiple sub-space support) |
| 96 | : addil LR'ltoff,%r19 ; get procedure entry point |
| 97 | : ldw RR'ltoff(%r1),%r21 |
| 98 | : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value. |
| 99 | : ldsid (%r21),%r1 |
| 100 | : mtsp %r1,%sr0 |
| 101 | : be 0(%sr0,%r21) ; branch to target |
| 102 | : stw %rp,-24(%sp) ; save rp |
| 103 | |
| 104 | Export stub to return from shared lib routine (multiple sub-space support) |
| 105 | One of these is created for each exported procedure in a shared |
| 106 | library (and stored in the shared lib). Shared lib routines are |
| 107 | called via the first instruction in the export stub so that we can |
| 108 | do an inter-space return. Not required for single sub-space. |
| 109 | : bl,n X,%rp ; trap the return |
| 110 | : nop |
| 111 | : ldw -24(%sp),%rp ; restore the original rp |
| 112 | : ldsid (%rp),%r1 |
| 113 | : mtsp %r1,%sr0 |
| 114 | : be,n 0(%sr0,%rp) ; inter-space return */ |
| 115 | |
| 116 | #define PLT_ENTRY_SIZE 8 |
| 117 | #define PLABEL_PLT_ENTRY_SIZE PLT_ENTRY_SIZE |
| 118 | #define GOT_ENTRY_SIZE 4 |
| 119 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| 120 | |
| 121 | static const bfd_byte plt_stub[] = |
| 122 | { |
| 123 | 0x0e, 0x80, 0x10, 0x96, /* 1: ldw 0(%r20),%r22 */ |
| 124 | 0xea, 0xc0, 0xc0, 0x00, /* bv %r0(%r22) */ |
| 125 | 0x0e, 0x88, 0x10, 0x95, /* ldw 4(%r20),%r21 */ |
| 126 | #define PLT_STUB_ENTRY (3*4) |
| 127 | 0xea, 0x9f, 0x1f, 0xdd, /* b,l 1b,%r20 */ |
| 128 | 0xd6, 0x80, 0x1c, 0x1e, /* depi 0,31,2,%r20 */ |
| 129 | 0x00, 0xc0, 0xff, 0xee, /* 9: .word fixup_func */ |
| 130 | 0xde, 0xad, 0xbe, 0xef /* .word fixup_ltp */ |
| 131 | }; |
| 132 | |
| 133 | /* Section name for stubs is the associated section name plus this |
| 134 | string. */ |
| 135 | #define STUB_SUFFIX ".stub" |
| 136 | |
| 137 | /* Setting the following non-zero makes all long branch stubs |
| 138 | generated during a shared link of the PIC variety. This saves on |
| 139 | relocs, but costs one extra instruction per stub. */ |
| 140 | #ifndef LONG_BRANCH_PIC_IN_SHLIB |
| 141 | #define LONG_BRANCH_PIC_IN_SHLIB 1 |
| 142 | #endif |
| 143 | |
| 144 | /* Set this non-zero to use import stubs instead of long branch stubs |
| 145 | where a .plt entry exists for the symbol. This is a fairly useless |
| 146 | option as import stubs are bigger than PIC long branch stubs. */ |
| 147 | #ifndef LONG_BRANCH_VIA_PLT |
| 148 | #define LONG_BRANCH_VIA_PLT 0 |
| 149 | #endif |
| 150 | |
| 151 | /* We don't need to copy any PC- or GP-relative dynamic relocs into a |
| 152 | shared object's dynamic section. All the relocs of the limited |
| 153 | class we are interested in, are absolute. See check_relocs. */ |
| 154 | #ifndef IS_ABSOLUTE_RELOC |
| 155 | #define IS_ABSOLUTE_RELOC(r_type) 1 |
| 156 | #endif |
| 157 | |
| 158 | enum elf32_hppa_stub_type { |
| 159 | hppa_stub_long_branch, |
| 160 | hppa_stub_long_branch_shared, |
| 161 | hppa_stub_import, |
| 162 | hppa_stub_import_shared, |
| 163 | hppa_stub_export, |
| 164 | hppa_stub_none |
| 165 | }; |
| 166 | |
| 167 | struct elf32_hppa_stub_hash_entry { |
| 168 | |
| 169 | /* Base hash table entry structure. */ |
| 170 | struct bfd_hash_entry root; |
| 171 | |
| 172 | /* The stub section. */ |
| 173 | asection *stub_sec; |
| 174 | |
| 175 | #if ! LONG_BRANCH_PIC_IN_SHLIB |
| 176 | /* It's associated reloc section. */ |
| 177 | asection *reloc_sec; |
| 178 | #endif |
| 179 | |
| 180 | /* Offset within stub_sec of the beginning of this stub. */ |
| 181 | bfd_vma stub_offset; |
| 182 | |
| 183 | /* Given the symbol's value and its section we can determine its final |
| 184 | value when building the stubs (so the stub knows where to jump. */ |
| 185 | bfd_vma target_value; |
| 186 | asection *target_section; |
| 187 | |
| 188 | enum elf32_hppa_stub_type stub_type; |
| 189 | |
| 190 | /* The symbol table entry, if any, that this was derived from. */ |
| 191 | struct elf32_hppa_link_hash_entry *h; |
| 192 | |
| 193 | /* Where this stub is being called from, or, in the case of combined |
| 194 | stub sections, the first input section in the group. */ |
| 195 | asection *id_sec; |
| 196 | }; |
| 197 | |
| 198 | struct elf32_hppa_link_hash_entry { |
| 199 | |
| 200 | struct elf_link_hash_entry elf; |
| 201 | |
| 202 | /* A pointer to the most recently used stub hash entry against this |
| 203 | symbol. */ |
| 204 | struct elf32_hppa_stub_hash_entry *stub_cache; |
| 205 | |
| 206 | #if ! LONG_BRANCH_PIC_IN_SHLIB |
| 207 | /* Used to track whether we have allocated space for a long branch |
| 208 | stub relocation for this symbol in the given section. */ |
| 209 | asection *stub_reloc_sec; |
| 210 | #endif |
| 211 | |
| 212 | /* Used to count relocations for delayed sizing of relocation |
| 213 | sections. */ |
| 214 | struct elf32_hppa_dyn_reloc_entry { |
| 215 | |
| 216 | /* Next relocation in the chain. */ |
| 217 | struct elf32_hppa_dyn_reloc_entry *next; |
| 218 | |
| 219 | /* The section in dynobj. */ |
| 220 | asection *section; |
| 221 | |
| 222 | /* Number of relocs copied in this section. */ |
| 223 | bfd_size_type count; |
| 224 | } *reloc_entries; |
| 225 | |
| 226 | /* Set during a static link if we detect a function is PIC. */ |
| 227 | unsigned int maybe_pic_call:1; |
| 228 | |
| 229 | /* Set if the only reason we need a .plt entry is for a non-PIC to |
| 230 | PIC function call. */ |
| 231 | unsigned int pic_call:1; |
| 232 | |
| 233 | /* Set if this symbol is used by a plabel reloc. */ |
| 234 | unsigned int plabel:1; |
| 235 | |
| 236 | /* Set if this symbol is an init or fini function and thus should |
| 237 | use an absolute reloc. */ |
| 238 | unsigned int plt_abs:1; |
| 239 | }; |
| 240 | |
| 241 | struct elf32_hppa_link_hash_table { |
| 242 | |
| 243 | /* The main hash table. */ |
| 244 | struct elf_link_hash_table root; |
| 245 | |
| 246 | /* The stub hash table. */ |
| 247 | struct bfd_hash_table stub_hash_table; |
| 248 | |
| 249 | /* Linker stub bfd. */ |
| 250 | bfd *stub_bfd; |
| 251 | |
| 252 | /* Linker call-backs. */ |
| 253 | asection * (*add_stub_section) PARAMS ((const char *, asection *)); |
| 254 | void (*layout_sections_again) PARAMS ((void)); |
| 255 | |
| 256 | /* Array to keep track of which stub sections have been created, and |
| 257 | information on stub grouping. */ |
| 258 | struct map_stub { |
| 259 | /* This is the section to which stubs in the group will be |
| 260 | attached. */ |
| 261 | asection *link_sec; |
| 262 | /* The stub section. */ |
| 263 | asection *stub_sec; |
| 264 | #if ! LONG_BRANCH_PIC_IN_SHLIB |
| 265 | /* The stub section's reloc section. */ |
| 266 | asection *reloc_sec; |
| 267 | #endif |
| 268 | } *stub_group; |
| 269 | |
| 270 | /* Short-cuts to get to dynamic linker sections. */ |
| 271 | asection *sgot; |
| 272 | asection *srelgot; |
| 273 | asection *splt; |
| 274 | asection *srelplt; |
| 275 | asection *sdynbss; |
| 276 | asection *srelbss; |
| 277 | |
| 278 | /* Used during a final link to store the base of the text and data |
| 279 | segments so that we can perform SEGREL relocations. */ |
| 280 | bfd_vma text_segment_base; |
| 281 | bfd_vma data_segment_base; |
| 282 | |
| 283 | /* Whether we support multiple sub-spaces for shared libs. */ |
| 284 | unsigned int multi_subspace:1; |
| 285 | |
| 286 | /* Flags set when PCREL12F and PCREL17F branches detected. Used to |
| 287 | select suitable defaults for the stub group size. */ |
| 288 | unsigned int has_12bit_branch:1; |
| 289 | unsigned int has_17bit_branch:1; |
| 290 | |
| 291 | /* Set if we need a .plt stub to support lazy dynamic linking. */ |
| 292 | unsigned int need_plt_stub:1; |
| 293 | }; |
| 294 | |
| 295 | /* Various hash macros and functions. */ |
| 296 | #define hppa_link_hash_table(p) \ |
| 297 | ((struct elf32_hppa_link_hash_table *) ((p)->hash)) |
| 298 | |
| 299 | #define hppa_stub_hash_lookup(table, string, create, copy) \ |
| 300 | ((struct elf32_hppa_stub_hash_entry *) \ |
| 301 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 302 | |
| 303 | static struct bfd_hash_entry *stub_hash_newfunc |
| 304 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 305 | |
| 306 | static struct bfd_hash_entry *hppa_link_hash_newfunc |
| 307 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 308 | |
| 309 | static struct bfd_link_hash_table *elf32_hppa_link_hash_table_create |
| 310 | PARAMS ((bfd *)); |
| 311 | |
| 312 | /* Stub handling functions. */ |
| 313 | static char *hppa_stub_name |
| 314 | PARAMS ((const asection *, const asection *, |
| 315 | const struct elf32_hppa_link_hash_entry *, |
| 316 | const Elf_Internal_Rela *)); |
| 317 | |
| 318 | static struct elf32_hppa_stub_hash_entry *hppa_get_stub_entry |
| 319 | PARAMS ((const asection *, const asection *, |
| 320 | struct elf32_hppa_link_hash_entry *, |
| 321 | const Elf_Internal_Rela *, |
| 322 | struct elf32_hppa_link_hash_table *)); |
| 323 | |
| 324 | static struct elf32_hppa_stub_hash_entry *hppa_add_stub |
| 325 | PARAMS ((const char *, asection *, struct elf32_hppa_link_hash_table *)); |
| 326 | |
| 327 | static enum elf32_hppa_stub_type hppa_type_of_stub |
| 328 | PARAMS ((asection *, const Elf_Internal_Rela *, |
| 329 | struct elf32_hppa_link_hash_entry *, bfd_vma)); |
| 330 | |
| 331 | static boolean hppa_build_one_stub |
| 332 | PARAMS ((struct bfd_hash_entry *, PTR)); |
| 333 | |
| 334 | static boolean hppa_size_one_stub |
| 335 | PARAMS ((struct bfd_hash_entry *, PTR)); |
| 336 | |
| 337 | /* BFD and elf backend functions. */ |
| 338 | static boolean elf32_hppa_object_p PARAMS ((bfd *)); |
| 339 | |
| 340 | static boolean elf32_hppa_add_symbol_hook |
| 341 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, |
| 342 | const char **, flagword *, asection **, bfd_vma *)); |
| 343 | |
| 344 | static boolean elf32_hppa_create_dynamic_sections |
| 345 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 346 | |
| 347 | static boolean elf32_hppa_check_relocs |
| 348 | PARAMS ((bfd *, struct bfd_link_info *, |
| 349 | asection *, const Elf_Internal_Rela *)); |
| 350 | |
| 351 | static asection *elf32_hppa_gc_mark_hook |
| 352 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, |
| 353 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
| 354 | |
| 355 | static boolean elf32_hppa_gc_sweep_hook |
| 356 | PARAMS ((bfd *, struct bfd_link_info *, |
| 357 | asection *, const Elf_Internal_Rela *)); |
| 358 | |
| 359 | static void elf32_hppa_hide_symbol |
| 360 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 361 | |
| 362 | static boolean elf32_hppa_adjust_dynamic_symbol |
| 363 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 364 | |
| 365 | static boolean hppa_handle_PIC_calls |
| 366 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 367 | |
| 368 | static boolean allocate_plt_and_got_and_discard_relocs |
| 369 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 370 | |
| 371 | static boolean clobber_millicode_symbols |
| 372 | PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *)); |
| 373 | |
| 374 | static boolean elf32_hppa_size_dynamic_sections |
| 375 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 376 | |
| 377 | static boolean elf32_hppa_final_link |
| 378 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 379 | |
| 380 | static void hppa_record_segment_addr |
| 381 | PARAMS ((bfd *, asection *, PTR)); |
| 382 | |
| 383 | static bfd_reloc_status_type final_link_relocate |
| 384 | PARAMS ((asection *, bfd_byte *, const Elf_Internal_Rela *, |
| 385 | bfd_vma, struct elf32_hppa_link_hash_table *, asection *, |
| 386 | struct elf32_hppa_link_hash_entry *)); |
| 387 | |
| 388 | static boolean elf32_hppa_relocate_section |
| 389 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, |
| 390 | bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| 391 | |
| 392 | static int hppa_unwind_entry_compare |
| 393 | PARAMS ((const PTR, const PTR)); |
| 394 | |
| 395 | static boolean elf32_hppa_finish_dynamic_symbol |
| 396 | PARAMS ((bfd *, struct bfd_link_info *, |
| 397 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
| 398 | |
| 399 | static boolean elf32_hppa_finish_dynamic_sections |
| 400 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 401 | |
| 402 | static void elf32_hppa_post_process_headers |
| 403 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 404 | |
| 405 | static int elf32_hppa_elf_get_symbol_type |
| 406 | PARAMS ((Elf_Internal_Sym *, int)); |
| 407 | |
| 408 | /* Assorted hash table functions. */ |
| 409 | |
| 410 | /* Initialize an entry in the stub hash table. */ |
| 411 | |
| 412 | static struct bfd_hash_entry * |
| 413 | stub_hash_newfunc (entry, table, string) |
| 414 | struct bfd_hash_entry *entry; |
| 415 | struct bfd_hash_table *table; |
| 416 | const char *string; |
| 417 | { |
| 418 | struct elf32_hppa_stub_hash_entry *ret; |
| 419 | |
| 420 | ret = (struct elf32_hppa_stub_hash_entry *) entry; |
| 421 | |
| 422 | /* Allocate the structure if it has not already been allocated by a |
| 423 | subclass. */ |
| 424 | if (ret == NULL) |
| 425 | { |
| 426 | ret = ((struct elf32_hppa_stub_hash_entry *) |
| 427 | bfd_hash_allocate (table, |
| 428 | sizeof (struct elf32_hppa_stub_hash_entry))); |
| 429 | if (ret == NULL) |
| 430 | return NULL; |
| 431 | } |
| 432 | |
| 433 | /* Call the allocation method of the superclass. */ |
| 434 | ret = ((struct elf32_hppa_stub_hash_entry *) |
| 435 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); |
| 436 | |
| 437 | if (ret) |
| 438 | { |
| 439 | /* Initialize the local fields. */ |
| 440 | ret->stub_sec = NULL; |
| 441 | #if ! LONG_BRANCH_PIC_IN_SHLIB |
| 442 | ret->reloc_sec = NULL; |
| 443 | #endif |
| 444 | ret->stub_offset = 0; |
| 445 | ret->target_value = 0; |
| 446 | ret->target_section = NULL; |
| 447 | ret->stub_type = hppa_stub_long_branch; |
| 448 | ret->h = NULL; |
| 449 | ret->id_sec = NULL; |
| 450 | } |
| 451 | |
| 452 | return (struct bfd_hash_entry *) ret; |
| 453 | } |
| 454 | |
| 455 | /* Initialize an entry in the link hash table. */ |
| 456 | |
| 457 | static struct bfd_hash_entry * |
| 458 | hppa_link_hash_newfunc (entry, table, string) |
| 459 | struct bfd_hash_entry *entry; |
| 460 | struct bfd_hash_table *table; |
| 461 | const char *string; |
| 462 | { |
| 463 | struct elf32_hppa_link_hash_entry *ret; |
| 464 | |
| 465 | ret = (struct elf32_hppa_link_hash_entry *) entry; |
| 466 | |
| 467 | /* Allocate the structure if it has not already been allocated by a |
| 468 | subclass. */ |
| 469 | if (ret == NULL) |
| 470 | { |
| 471 | ret = ((struct elf32_hppa_link_hash_entry *) |
| 472 | bfd_hash_allocate (table, |
| 473 | sizeof (struct elf32_hppa_link_hash_entry))); |
| 474 | if (ret == NULL) |
| 475 | return NULL; |
| 476 | } |
| 477 | |
| 478 | /* Call the allocation method of the superclass. */ |
| 479 | ret = ((struct elf32_hppa_link_hash_entry *) |
| 480 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 481 | table, string)); |
| 482 | |
| 483 | if (ret) |
| 484 | { |
| 485 | /* Initialize the local fields. */ |
| 486 | #if ! LONG_BRANCH_PIC_IN_SHLIB |
| 487 | ret->stub_reloc_sec = NULL; |
| 488 | #endif |
| 489 | ret->stub_cache = NULL; |
| 490 | ret->reloc_entries = NULL; |
| 491 | ret->maybe_pic_call = 0; |
| 492 | ret->pic_call = 0; |
| 493 | ret->plabel = 0; |
| 494 | ret->plt_abs = 0; |
| 495 | } |
| 496 | |
| 497 | return (struct bfd_hash_entry *) ret; |
| 498 | } |
| 499 | |
| 500 | /* Create the derived linker hash table. The PA ELF port uses the derived |
| 501 | hash table to keep information specific to the PA ELF linker (without |
| 502 | using static variables). */ |
| 503 | |
| 504 | static struct bfd_link_hash_table * |
| 505 | elf32_hppa_link_hash_table_create (abfd) |
| 506 | bfd *abfd; |
| 507 | { |
| 508 | struct elf32_hppa_link_hash_table *ret; |
| 509 | bfd_size_type amt = sizeof (*ret); |
| 510 | |
| 511 | ret = (struct elf32_hppa_link_hash_table *) bfd_alloc (abfd, amt); |
| 512 | if (ret == NULL) |
| 513 | return NULL; |
| 514 | |
| 515 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, hppa_link_hash_newfunc)) |
| 516 | { |
| 517 | bfd_release (abfd, ret); |
| 518 | return NULL; |
| 519 | } |
| 520 | |
| 521 | /* Init the stub hash table too. */ |
| 522 | if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc)) |
| 523 | return NULL; |
| 524 | |
| 525 | ret->stub_bfd = NULL; |
| 526 | ret->add_stub_section = NULL; |
| 527 | ret->layout_sections_again = NULL; |
| 528 | ret->stub_group = NULL; |
| 529 | ret->sgot = NULL; |
| 530 | ret->srelgot = NULL; |
| 531 | ret->splt = NULL; |
| 532 | ret->srelplt = NULL; |
| 533 | ret->sdynbss = NULL; |
| 534 | ret->srelbss = NULL; |
| 535 | ret->text_segment_base = (bfd_vma) -1; |
| 536 | ret->data_segment_base = (bfd_vma) -1; |
| 537 | ret->multi_subspace = 0; |
| 538 | ret->has_12bit_branch = 0; |
| 539 | ret->has_17bit_branch = 0; |
| 540 | ret->need_plt_stub = 0; |
| 541 | |
| 542 | return &ret->root.root; |
| 543 | } |
| 544 | |
| 545 | /* Build a name for an entry in the stub hash table. */ |
| 546 | |
| 547 | static char * |
| 548 | hppa_stub_name (input_section, sym_sec, hash, rel) |
| 549 | const asection *input_section; |
| 550 | const asection *sym_sec; |
| 551 | const struct elf32_hppa_link_hash_entry *hash; |
| 552 | const Elf_Internal_Rela *rel; |
| 553 | { |
| 554 | char *stub_name; |
| 555 | bfd_size_type len; |
| 556 | |
| 557 | if (hash) |
| 558 | { |
| 559 | len = 8 + 1 + strlen (hash->elf.root.root.string) + 1 + 8 + 1; |
| 560 | stub_name = bfd_malloc (len); |
| 561 | if (stub_name != NULL) |
| 562 | { |
| 563 | sprintf (stub_name, "%08x_%s+%x", |
| 564 | input_section->id & 0xffffffff, |
| 565 | hash->elf.root.root.string, |
| 566 | (int) rel->r_addend & 0xffffffff); |
| 567 | } |
| 568 | } |
| 569 | else |
| 570 | { |
| 571 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; |
| 572 | stub_name = bfd_malloc (len); |
| 573 | if (stub_name != NULL) |
| 574 | { |
| 575 | sprintf (stub_name, "%08x_%x:%x+%x", |
| 576 | input_section->id & 0xffffffff, |
| 577 | sym_sec->id & 0xffffffff, |
| 578 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, |
| 579 | (int) rel->r_addend & 0xffffffff); |
| 580 | } |
| 581 | } |
| 582 | return stub_name; |
| 583 | } |
| 584 | |
| 585 | /* Look up an entry in the stub hash. Stub entries are cached because |
| 586 | creating the stub name takes a bit of time. */ |
| 587 | |
| 588 | static struct elf32_hppa_stub_hash_entry * |
| 589 | hppa_get_stub_entry (input_section, sym_sec, hash, rel, hplink) |
| 590 | const asection *input_section; |
| 591 | const asection *sym_sec; |
| 592 | struct elf32_hppa_link_hash_entry *hash; |
| 593 | const Elf_Internal_Rela *rel; |
| 594 | struct elf32_hppa_link_hash_table *hplink; |
| 595 | { |
| 596 | struct elf32_hppa_stub_hash_entry *stub_entry; |
| 597 | const asection *id_sec; |
| 598 | |
| 599 | /* If this input section is part of a group of sections sharing one |
| 600 | stub section, then use the id of the first section in the group. |
| 601 | Stub names need to include a section id, as there may well be |
| 602 | more than one stub used to reach say, printf, and we need to |
| 603 | distinguish between them. */ |
| 604 | id_sec = hplink->stub_group[input_section->id].link_sec; |
| 605 | |
| 606 | if (hash != NULL && hash->stub_cache != NULL |
| 607 | && hash->stub_cache->h == hash |
| 608 | && hash->stub_cache->id_sec == id_sec) |
| 609 | { |
| 610 | stub_entry = hash->stub_cache; |
| 611 | } |
| 612 | else |
| 613 | { |
| 614 | char *stub_name; |
| 615 | |
| 616 | stub_name = hppa_stub_name (id_sec, sym_sec, hash, rel); |
| 617 | if (stub_name == NULL) |
| 618 | return NULL; |
| 619 | |
| 620 | stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table, |
| 621 | stub_name, false, false); |
| 622 | if (stub_entry == NULL) |
| 623 | { |
| 624 | if (hash == NULL || hash->elf.root.type != bfd_link_hash_undefweak) |
| 625 | (*_bfd_error_handler) (_("%s(%s+0x%lx): cannot find stub entry %s"), |
| 626 | bfd_get_filename (input_section->owner), |
| 627 | input_section->name, |
| 628 | (long) rel->r_offset, |
| 629 | stub_name); |
| 630 | } |
| 631 | else |
| 632 | { |
| 633 | if (hash != NULL) |
| 634 | hash->stub_cache = stub_entry; |
| 635 | } |
| 636 | |
| 637 | free (stub_name); |
| 638 | } |
| 639 | |
| 640 | return stub_entry; |
| 641 | } |
| 642 | |
| 643 | /* Add a new stub entry to the stub hash. Not all fields of the new |
| 644 | stub entry are initialised. */ |
| 645 | |
| 646 | static struct elf32_hppa_stub_hash_entry * |
| 647 | hppa_add_stub (stub_name, section, hplink) |
| 648 | const char *stub_name; |
| 649 | asection *section; |
| 650 | struct elf32_hppa_link_hash_table *hplink; |
| 651 | { |
| 652 | asection *link_sec; |
| 653 | asection *stub_sec; |
| 654 | struct elf32_hppa_stub_hash_entry *stub_entry; |
| 655 | |
| 656 | link_sec = hplink->stub_group[section->id].link_sec; |
| 657 | stub_sec = hplink->stub_group[section->id].stub_sec; |
| 658 | if (stub_sec == NULL) |
| 659 | { |
| 660 | stub_sec = hplink->stub_group[link_sec->id].stub_sec; |
| 661 | if (stub_sec == NULL) |
| 662 | { |
| 663 | bfd_size_type len; |
| 664 | char *s_name; |
| 665 | |
| 666 | len = strlen (link_sec->name) + sizeof (STUB_SUFFIX); |
| 667 | s_name = bfd_alloc (hplink->stub_bfd, len); |
| 668 | if (s_name == NULL) |
| 669 | return NULL; |
| 670 | |
| 671 | strcpy (s_name, link_sec->name); |
| 672 | strcpy (s_name + len - sizeof (STUB_SUFFIX), STUB_SUFFIX); |
| 673 | stub_sec = (*hplink->add_stub_section) (s_name, link_sec); |
| 674 | if (stub_sec == NULL) |
| 675 | return NULL; |
| 676 | hplink->stub_group[link_sec->id].stub_sec = stub_sec; |
| 677 | } |
| 678 | hplink->stub_group[section->id].stub_sec = stub_sec; |
| 679 | } |
| 680 | |
| 681 | /* Enter this entry into the linker stub hash table. */ |
| 682 | stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table, stub_name, |
| 683 | true, false); |
| 684 | if (stub_entry == NULL) |
| 685 | { |
| 686 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), |
| 687 | bfd_get_filename (section->owner), |
| 688 | stub_name); |
| 689 | return NULL; |
| 690 | } |
| 691 | |
| 692 | stub_entry->stub_sec = stub_sec; |
| 693 | #if ! LONG_BRANCH_PIC_IN_SHLIB |
| 694 | stub_entry->reloc_sec = hplink->stub_group[section->id].reloc_sec; |
| 695 | #endif |
| 696 | stub_entry->stub_offset = 0; |
| 697 | stub_entry->id_sec = link_sec; |
| 698 | return stub_entry; |
| 699 | } |
| 700 | |
| 701 | /* Determine the type of stub needed, if any, for a call. */ |
| 702 | |
| 703 | static enum elf32_hppa_stub_type |
| 704 | hppa_type_of_stub (input_sec, rel, hash, destination) |
| 705 | asection *input_sec; |
| 706 | const Elf_Internal_Rela *rel; |
| 707 | struct elf32_hppa_link_hash_entry *hash; |
| 708 | bfd_vma destination; |
| 709 | { |
| 710 | bfd_vma location; |
| 711 | bfd_vma branch_offset; |
| 712 | bfd_vma max_branch_offset; |
| 713 | unsigned int r_type; |
| 714 | |
| 715 | if (hash != NULL |
| 716 | && (((hash->elf.root.type == bfd_link_hash_defined |
| 717 | || hash->elf.root.type == bfd_link_hash_defweak) |
| 718 | && hash->elf.root.u.def.section->output_section == NULL) |
| 719 | || (hash->elf.root.type == bfd_link_hash_defweak |
| 720 | && hash->elf.dynindx != -1 |
| 721 | && hash->elf.plt.offset != (bfd_vma) -1) |
| 722 | || hash->elf.root.type == bfd_link_hash_undefweak |
| 723 | || hash->elf.root.type == bfd_link_hash_undefined |
| 724 | || (hash->maybe_pic_call && !(input_sec->flags & SEC_HAS_GOT_REF)))) |
| 725 | { |
| 726 | /* If output_section is NULL, then it's a symbol defined in a |
| 727 | shared library. We will need an import stub. Decide between |
| 728 | hppa_stub_import and hppa_stub_import_shared later. For |
| 729 | shared links we need stubs for undefined or weak syms too; |
| 730 | They will presumably be resolved by the dynamic linker. */ |
| 731 | return hppa_stub_import; |
| 732 | } |
| 733 | |
| 734 | /* Determine where the call point is. */ |
| 735 | location = (input_sec->output_offset |
| 736 | + input_sec->output_section->vma |
| 737 | + rel->r_offset); |
| 738 | |
| 739 | branch_offset = destination - location - 8; |
| 740 | r_type = ELF32_R_TYPE (rel->r_info); |
| 741 | |
| 742 | /* Determine if a long branch stub is needed. parisc branch offsets |
| 743 | are relative to the second instruction past the branch, ie. +8 |
| 744 | bytes on from the branch instruction location. The offset is |
| 745 | signed and counts in units of 4 bytes. */ |
| 746 | if (r_type == (unsigned int) R_PARISC_PCREL17F) |
| 747 | { |
| 748 | max_branch_offset = (1 << (17-1)) << 2; |
| 749 | } |
| 750 | else if (r_type == (unsigned int) R_PARISC_PCREL12F) |
| 751 | { |
| 752 | max_branch_offset = (1 << (12-1)) << 2; |
| 753 | } |
| 754 | else /* R_PARISC_PCREL22F. */ |
| 755 | { |
| 756 | max_branch_offset = (1 << (22-1)) << 2; |
| 757 | } |
| 758 | |
| 759 | if (branch_offset + max_branch_offset >= 2*max_branch_offset) |
| 760 | { |
| 761 | #if LONG_BRANCH_VIA_PLT |
| 762 | if (hash != NULL |
| 763 | && hash->elf.dynindx != -1 |
| 764 | && hash->elf.plt.offset != (bfd_vma) -1 |
| 765 | && hash->elf.type != STT_PARISC_MILLI) |
| 766 | { |
| 767 | /* If we are doing a shared link and find we need a long |
| 768 | branch stub, then go via the .plt if possible. */ |
| 769 | return hppa_stub_import; |
| 770 | } |
| 771 | else |
| 772 | #endif |
| 773 | return hppa_stub_long_branch; |
| 774 | } |
| 775 | return hppa_stub_none; |
| 776 | } |
| 777 | |
| 778 | /* Build one linker stub as defined by the stub hash table entry GEN_ENTRY. |
| 779 | IN_ARG contains the link info pointer. */ |
| 780 | |
| 781 | #define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */ |
| 782 | #define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */ |
| 783 | |
| 784 | #define BL_R1 0xe8200000 /* b,l .+8,%r1 */ |
| 785 | #define ADDIL_R1 0x28200000 /* addil LR'XXX,%r1,%r1 */ |
| 786 | #define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */ |
| 787 | |
| 788 | #define ADDIL_DP 0x2b600000 /* addil LR'XXX,%dp,%r1 */ |
| 789 | #define LDW_R1_R21 0x48350000 /* ldw RR'XXX(%sr0,%r1),%r21 */ |
| 790 | #define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */ |
| 791 | #define LDW_R1_R19 0x48330000 /* ldw RR'XXX(%sr0,%r1),%r19 */ |
| 792 | |
| 793 | #define ADDIL_R19 0x2a600000 /* addil LR'XXX,%r19,%r1 */ |
| 794 | #define LDW_R1_DP 0x483b0000 /* ldw RR'XXX(%sr0,%r1),%dp */ |
| 795 | |
| 796 | #define LDSID_R21_R1 0x02a010a1 /* ldsid (%sr0,%r21),%r1 */ |
| 797 | #define MTSP_R1 0x00011820 /* mtsp %r1,%sr0 */ |
| 798 | #define BE_SR0_R21 0xe2a00000 /* be 0(%sr0,%r21) */ |
| 799 | #define STW_RP 0x6bc23fd1 /* stw %rp,-24(%sr0,%sp) */ |
| 800 | |
| 801 | #define BL_RP 0xe8400002 /* b,l,n XXX,%rp */ |
| 802 | #define NOP 0x08000240 /* nop */ |
| 803 | #define LDW_RP 0x4bc23fd1 /* ldw -24(%sr0,%sp),%rp */ |
| 804 | #define LDSID_RP_R1 0x004010a1 /* ldsid (%sr0,%rp),%r1 */ |
| 805 | #define BE_SR0_RP 0xe0400002 /* be,n 0(%sr0,%rp) */ |
| 806 | |
| 807 | #ifndef R19_STUBS |
| 808 | #define R19_STUBS 1 |
| 809 | #endif |
| 810 | |
| 811 | #if R19_STUBS |
| 812 | #define LDW_R1_DLT LDW_R1_R19 |
| 813 | #else |
| 814 | #define LDW_R1_DLT LDW_R1_DP |
| 815 | #endif |
| 816 | |
| 817 | static boolean |
| 818 | hppa_build_one_stub (gen_entry, in_arg) |
| 819 | struct bfd_hash_entry *gen_entry; |
| 820 | PTR in_arg; |
| 821 | { |
| 822 | struct elf32_hppa_stub_hash_entry *stub_entry; |
| 823 | struct bfd_link_info *info; |
| 824 | struct elf32_hppa_link_hash_table *hplink; |
| 825 | asection *stub_sec; |
| 826 | bfd *stub_bfd; |
| 827 | bfd_byte *loc; |
| 828 | bfd_vma sym_value; |
| 829 | bfd_vma insn; |
| 830 | bfd_vma off; |
| 831 | int val; |
| 832 | int size; |
| 833 | |
| 834 | /* Massage our args to the form they really have. */ |
| 835 | stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry; |
| 836 | info = (struct bfd_link_info *) in_arg; |
| 837 | |
| 838 | hplink = hppa_link_hash_table (info); |
| 839 | stub_sec = stub_entry->stub_sec; |
| 840 | |
| 841 | /* Make a note of the offset within the stubs for this entry. */ |
| 842 | stub_entry->stub_offset = stub_sec->_raw_size; |
| 843 | loc = stub_sec->contents + stub_entry->stub_offset; |
| 844 | |
| 845 | stub_bfd = stub_sec->owner; |
| 846 | |
| 847 | switch (stub_entry->stub_type) |
| 848 | { |
| 849 | case hppa_stub_long_branch: |
| 850 | /* Create the long branch. A long branch is formed with "ldil" |
| 851 | loading the upper bits of the target address into a register, |
| 852 | then branching with "be" which adds in the lower bits. |
| 853 | The "be" has its delay slot nullified. */ |
| 854 | sym_value = (stub_entry->target_value |
| 855 | + stub_entry->target_section->output_offset |
| 856 | + stub_entry->target_section->output_section->vma); |
| 857 | |
| 858 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel); |
| 859 | insn = hppa_rebuild_insn ((int) LDIL_R1, val, 21); |
| 860 | bfd_put_32 (stub_bfd, insn, loc); |
| 861 | |
| 862 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel) >> 2; |
| 863 | insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17); |
| 864 | bfd_put_32 (stub_bfd, insn, loc + 4); |
| 865 | |
| 866 | #if ! LONG_BRANCH_PIC_IN_SHLIB |
| 867 | if (info->shared) |
| 868 | { |
| 869 | /* Output a dynamic relocation for this stub. We only |
| 870 | output one PCREL21L reloc per stub, trusting that the |
| 871 | dynamic linker will also fix the implied PCREL17R for the |
| 872 | second instruction. PCREL21L dynamic relocs had better |
| 873 | never be emitted for some other purpose... */ |
| 874 | asection *srel; |
| 875 | Elf_Internal_Rela outrel; |
| 876 | |
| 877 | if (stub_entry->h == NULL) |
| 878 | { |
| 879 | (*_bfd_error_handler) |
| 880 | (_("%s(%s+0x%lx): cannot relocate %s, recompile with -ffunction-sections"), |
| 881 | bfd_get_filename (stub_entry->target_section->owner), |
| 882 | stub_sec->name, |
| 883 | (long) stub_entry->stub_offset, |
| 884 | stub_entry->root.string); |
| 885 | bfd_set_error (bfd_error_bad_value); |
| 886 | return false; |
| 887 | } |
| 888 | |
| 889 | srel = stub_entry->reloc_sec; |
| 890 | if (srel == NULL) |
| 891 | { |
| 892 | (*_bfd_error_handler) |
| 893 | (_("Could not find relocation section for %s"), |
| 894 | stub_sec->name); |
| 895 | bfd_set_error (bfd_error_bad_value); |
| 896 | return false; |
| 897 | } |
| 898 | |
| 899 | outrel.r_offset = (stub_entry->stub_offset |
| 900 | + stub_sec->output_offset |
| 901 | + stub_sec->output_section->vma); |
| 902 | outrel.r_info = ELF32_R_INFO (0, R_PARISC_PCREL21L); |
| 903 | outrel.r_addend = sym_value; |
| 904 | bfd_elf32_swap_reloca_out (stub_sec->output_section->owner, |
| 905 | &outrel, |
| 906 | ((Elf32_External_Rela *) |
| 907 | srel->contents + srel->reloc_count)); |
| 908 | ++srel->reloc_count; |
| 909 | } |
| 910 | #endif |
| 911 | size = 8; |
| 912 | break; |
| 913 | |
| 914 | case hppa_stub_long_branch_shared: |
| 915 | /* Branches are relative. This is where we are going to. */ |
| 916 | sym_value = (stub_entry->target_value |
| 917 | + stub_entry->target_section->output_offset |
| 918 | + stub_entry->target_section->output_section->vma); |
| 919 | |
| 920 | /* And this is where we are coming from, more or less. */ |
| 921 | sym_value -= (stub_entry->stub_offset |
| 922 | + stub_sec->output_offset |
| 923 | + stub_sec->output_section->vma); |
| 924 | |
| 925 | bfd_put_32 (stub_bfd, (bfd_vma) BL_R1, loc); |
| 926 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_lrsel); |
| 927 | insn = hppa_rebuild_insn ((int) ADDIL_R1, val, 21); |
| 928 | bfd_put_32 (stub_bfd, insn, loc + 4); |
| 929 | |
| 930 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_rrsel) >> 2; |
| 931 | insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17); |
| 932 | bfd_put_32 (stub_bfd, insn, loc + 8); |
| 933 | size = 12; |
| 934 | break; |
| 935 | |
| 936 | case hppa_stub_import: |
| 937 | case hppa_stub_import_shared: |
| 938 | off = stub_entry->h->elf.plt.offset; |
| 939 | if (off >= (bfd_vma) -2) |
| 940 | abort (); |
| 941 | |
| 942 | off &= ~ (bfd_vma) 1; |
| 943 | sym_value = (off |
| 944 | + hplink->splt->output_offset |
| 945 | + hplink->splt->output_section->vma |
| 946 | - elf_gp (hplink->splt->output_section->owner)); |
| 947 | |
| 948 | insn = ADDIL_DP; |
| 949 | #if R19_STUBS |
| 950 | if (stub_entry->stub_type == hppa_stub_import_shared) |
| 951 | insn = ADDIL_R19; |
| 952 | #endif |
| 953 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel), |
| 954 | insn = hppa_rebuild_insn ((int) insn, val, 21); |
| 955 | bfd_put_32 (stub_bfd, insn, loc); |
| 956 | |
| 957 | /* It is critical to use lrsel/rrsel here because we are using |
| 958 | two different offsets (+0 and +4) from sym_value. If we use |
| 959 | lsel/rsel then with unfortunate sym_values we will round |
| 960 | sym_value+4 up to the next 2k block leading to a mis-match |
| 961 | between the lsel and rsel value. */ |
| 962 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel); |
| 963 | insn = hppa_rebuild_insn ((int) LDW_R1_R21, val, 14); |
| 964 | bfd_put_32 (stub_bfd, insn, loc + 4); |
| 965 | |
| 966 | if (hplink->multi_subspace) |
| 967 | { |
| 968 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel); |
| 969 | insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14); |
| 970 | bfd_put_32 (stub_bfd, insn, loc + 8); |
| 971 | |
| 972 | bfd_put_32 (stub_bfd, (bfd_vma) LDSID_R21_R1, loc + 12); |
| 973 | bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16); |
| 974 | bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_R21, loc + 20); |
| 975 | bfd_put_32 (stub_bfd, (bfd_vma) STW_RP, loc + 24); |
| 976 | |
| 977 | size = 28; |
| 978 | } |
| 979 | else |
| 980 | { |
| 981 | bfd_put_32 (stub_bfd, (bfd_vma) BV_R0_R21, loc + 8); |
| 982 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel); |
| 983 | insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14); |
| 984 | bfd_put_32 (stub_bfd, insn, loc + 12); |
| 985 | |
| 986 | size = 16; |
| 987 | } |
| 988 | |
| 989 | if (!info->shared |
| 990 | && stub_entry->h != NULL |
| 991 | && stub_entry->h->pic_call) |
| 992 | { |
| 993 | /* Build the .plt entry needed to call a PIC function from |
| 994 | statically linked code. We don't need any relocs. */ |
| 995 | bfd *dynobj; |
| 996 | struct elf32_hppa_link_hash_entry *eh; |
| 997 | bfd_vma value; |
| 998 | |
| 999 | dynobj = hplink->root.dynobj; |
| 1000 | eh = (struct elf32_hppa_link_hash_entry *) stub_entry->h; |
| 1001 | |
| 1002 | if (eh->elf.root.type != bfd_link_hash_defined |
| 1003 | && eh->elf.root.type != bfd_link_hash_defweak) |
| 1004 | abort (); |
| 1005 | |
| 1006 | value = (eh->elf.root.u.def.value |
| 1007 | + eh->elf.root.u.def.section->output_offset |
| 1008 | + eh->elf.root.u.def.section->output_section->vma); |
| 1009 | |
| 1010 | /* Fill in the entry in the procedure linkage table. |
| 1011 | |
| 1012 | The format of a plt entry is |
| 1013 | <funcaddr> |
| 1014 | <__gp>. */ |
| 1015 | |
| 1016 | bfd_put_32 (hplink->splt->owner, value, |
| 1017 | hplink->splt->contents + off); |
| 1018 | value = elf_gp (hplink->splt->output_section->owner); |
| 1019 | bfd_put_32 (hplink->splt->owner, value, |
| 1020 | hplink->splt->contents + off + 4); |
| 1021 | } |
| 1022 | break; |
| 1023 | |
| 1024 | case hppa_stub_export: |
| 1025 | /* Branches are relative. This is where we are going to. */ |
| 1026 | sym_value = (stub_entry->target_value |
| 1027 | + stub_entry->target_section->output_offset |
| 1028 | + stub_entry->target_section->output_section->vma); |
| 1029 | |
| 1030 | /* And this is where we are coming from. */ |
| 1031 | sym_value -= (stub_entry->stub_offset |
| 1032 | + stub_sec->output_offset |
| 1033 | + stub_sec->output_section->vma); |
| 1034 | |
| 1035 | if (sym_value - 8 + 0x40000 >= 0x80000) |
| 1036 | { |
| 1037 | (*_bfd_error_handler) |
| 1038 | (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"), |
| 1039 | bfd_get_filename (stub_entry->target_section->owner), |
| 1040 | stub_sec->name, |
| 1041 | (long) stub_entry->stub_offset, |
| 1042 | stub_entry->root.string); |
| 1043 | bfd_set_error (bfd_error_bad_value); |
| 1044 | return false; |
| 1045 | } |
| 1046 | |
| 1047 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_fsel) >> 2; |
| 1048 | insn = hppa_rebuild_insn ((int) BL_RP, val, 17); |
| 1049 | bfd_put_32 (stub_bfd, insn, loc); |
| 1050 | |
| 1051 | bfd_put_32 (stub_bfd, (bfd_vma) NOP, loc + 4); |
| 1052 | bfd_put_32 (stub_bfd, (bfd_vma) LDW_RP, loc + 8); |
| 1053 | bfd_put_32 (stub_bfd, (bfd_vma) LDSID_RP_R1, loc + 12); |
| 1054 | bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16); |
| 1055 | bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_RP, loc + 20); |
| 1056 | |
| 1057 | /* Point the function symbol at the stub. */ |
| 1058 | stub_entry->h->elf.root.u.def.section = stub_sec; |
| 1059 | stub_entry->h->elf.root.u.def.value = stub_sec->_raw_size; |
| 1060 | |
| 1061 | size = 24; |
| 1062 | break; |
| 1063 | |
| 1064 | default: |
| 1065 | BFD_FAIL (); |
| 1066 | return false; |
| 1067 | } |
| 1068 | |
| 1069 | stub_sec->_raw_size += size; |
| 1070 | return true; |
| 1071 | } |
| 1072 | |
| 1073 | #undef LDIL_R1 |
| 1074 | #undef BE_SR4_R1 |
| 1075 | #undef BL_R1 |
| 1076 | #undef ADDIL_R1 |
| 1077 | #undef DEPI_R1 |
| 1078 | #undef ADDIL_DP |
| 1079 | #undef LDW_R1_R21 |
| 1080 | #undef LDW_R1_DLT |
| 1081 | #undef LDW_R1_R19 |
| 1082 | #undef ADDIL_R19 |
| 1083 | #undef LDW_R1_DP |
| 1084 | #undef LDSID_R21_R1 |
| 1085 | #undef MTSP_R1 |
| 1086 | #undef BE_SR0_R21 |
| 1087 | #undef STW_RP |
| 1088 | #undef BV_R0_R21 |
| 1089 | #undef BL_RP |
| 1090 | #undef NOP |
| 1091 | #undef LDW_RP |
| 1092 | #undef LDSID_RP_R1 |
| 1093 | #undef BE_SR0_RP |
| 1094 | |
| 1095 | /* As above, but don't actually build the stub. Just bump offset so |
| 1096 | we know stub section sizes. */ |
| 1097 | |
| 1098 | static boolean |
| 1099 | hppa_size_one_stub (gen_entry, in_arg) |
| 1100 | struct bfd_hash_entry *gen_entry; |
| 1101 | PTR in_arg; |
| 1102 | { |
| 1103 | struct elf32_hppa_stub_hash_entry *stub_entry; |
| 1104 | struct elf32_hppa_link_hash_table *hplink; |
| 1105 | int size; |
| 1106 | |
| 1107 | /* Massage our args to the form they really have. */ |
| 1108 | stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry; |
| 1109 | hplink = (struct elf32_hppa_link_hash_table *) in_arg; |
| 1110 | |
| 1111 | if (stub_entry->stub_type == hppa_stub_long_branch) |
| 1112 | { |
| 1113 | #if ! LONG_BRANCH_PIC_IN_SHLIB |
| 1114 | if (stub_entry->reloc_sec != NULL) |
| 1115 | stub_entry->reloc_sec->_raw_size += sizeof (Elf32_External_Rela); |
| 1116 | #endif |
| 1117 | size = 8; |
| 1118 | } |
| 1119 | else if (stub_entry->stub_type == hppa_stub_long_branch_shared) |
| 1120 | size = 12; |
| 1121 | else if (stub_entry->stub_type == hppa_stub_export) |
| 1122 | size = 24; |
| 1123 | else /* hppa_stub_import or hppa_stub_import_shared. */ |
| 1124 | { |
| 1125 | if (hplink->multi_subspace) |
| 1126 | size = 28; |
| 1127 | else |
| 1128 | size = 16; |
| 1129 | } |
| 1130 | |
| 1131 | stub_entry->stub_sec->_raw_size += size; |
| 1132 | return true; |
| 1133 | } |
| 1134 | |
| 1135 | /* Return nonzero if ABFD represents an HPPA ELF32 file. |
| 1136 | Additionally we set the default architecture and machine. */ |
| 1137 | |
| 1138 | static boolean |
| 1139 | elf32_hppa_object_p (abfd) |
| 1140 | bfd *abfd; |
| 1141 | { |
| 1142 | Elf_Internal_Ehdr * i_ehdrp; |
| 1143 | unsigned int flags; |
| 1144 | |
| 1145 | i_ehdrp = elf_elfheader (abfd); |
| 1146 | if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0) |
| 1147 | { |
| 1148 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_LINUX) |
| 1149 | return false; |
| 1150 | } |
| 1151 | else |
| 1152 | { |
| 1153 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX) |
| 1154 | return false; |
| 1155 | } |
| 1156 | |
| 1157 | flags = i_ehdrp->e_flags; |
| 1158 | switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE)) |
| 1159 | { |
| 1160 | case EFA_PARISC_1_0: |
| 1161 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10); |
| 1162 | case EFA_PARISC_1_1: |
| 1163 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11); |
| 1164 | case EFA_PARISC_2_0: |
| 1165 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20); |
| 1166 | case EFA_PARISC_2_0 | EF_PARISC_WIDE: |
| 1167 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25); |
| 1168 | } |
| 1169 | return true; |
| 1170 | } |
| 1171 | |
| 1172 | /* Undo the generic ELF code's subtraction of section->vma from the |
| 1173 | value of each external symbol. */ |
| 1174 | |
| 1175 | static boolean |
| 1176 | elf32_hppa_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| 1177 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1178 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1179 | const Elf_Internal_Sym *sym ATTRIBUTE_UNUSED; |
| 1180 | const char **namep ATTRIBUTE_UNUSED; |
| 1181 | flagword *flagsp ATTRIBUTE_UNUSED; |
| 1182 | asection **secp; |
| 1183 | bfd_vma *valp; |
| 1184 | { |
| 1185 | *valp += (*secp)->vma; |
| 1186 | return true; |
| 1187 | } |
| 1188 | |
| 1189 | /* Create the .plt and .got sections, and set up our hash table |
| 1190 | short-cuts to various dynamic sections. */ |
| 1191 | |
| 1192 | static boolean |
| 1193 | elf32_hppa_create_dynamic_sections (abfd, info) |
| 1194 | bfd *abfd; |
| 1195 | struct bfd_link_info *info; |
| 1196 | { |
| 1197 | struct elf32_hppa_link_hash_table *hplink; |
| 1198 | |
| 1199 | /* Don't try to create the .plt and .got twice. */ |
| 1200 | hplink = hppa_link_hash_table (info); |
| 1201 | if (hplink->splt != NULL) |
| 1202 | return true; |
| 1203 | |
| 1204 | /* Call the generic code to do most of the work. */ |
| 1205 | if (! _bfd_elf_create_dynamic_sections (abfd, info)) |
| 1206 | return false; |
| 1207 | |
| 1208 | hplink->splt = bfd_get_section_by_name (abfd, ".plt"); |
| 1209 | hplink->srelplt = bfd_get_section_by_name (abfd, ".rela.plt"); |
| 1210 | |
| 1211 | hplink->sgot = bfd_get_section_by_name (abfd, ".got"); |
| 1212 | hplink->srelgot = bfd_make_section (abfd, ".rela.got"); |
| 1213 | if (hplink->srelgot == NULL |
| 1214 | || ! bfd_set_section_flags (abfd, hplink->srelgot, |
| 1215 | (SEC_ALLOC |
| 1216 | | SEC_LOAD |
| 1217 | | SEC_HAS_CONTENTS |
| 1218 | | SEC_IN_MEMORY |
| 1219 | | SEC_LINKER_CREATED |
| 1220 | | SEC_READONLY)) |
| 1221 | || ! bfd_set_section_alignment (abfd, hplink->srelgot, 2)) |
| 1222 | return false; |
| 1223 | |
| 1224 | hplink->sdynbss = bfd_get_section_by_name (abfd, ".dynbss"); |
| 1225 | hplink->srelbss = bfd_get_section_by_name (abfd, ".rela.bss"); |
| 1226 | |
| 1227 | return true; |
| 1228 | } |
| 1229 | |
| 1230 | /* Look through the relocs for a section during the first phase, and |
| 1231 | allocate space in the global offset table or procedure linkage |
| 1232 | table. At this point we haven't necessarily read all the input |
| 1233 | files. */ |
| 1234 | |
| 1235 | static boolean |
| 1236 | elf32_hppa_check_relocs (abfd, info, sec, relocs) |
| 1237 | bfd *abfd; |
| 1238 | struct bfd_link_info *info; |
| 1239 | asection *sec; |
| 1240 | const Elf_Internal_Rela *relocs; |
| 1241 | { |
| 1242 | bfd *dynobj; |
| 1243 | Elf_Internal_Shdr *symtab_hdr; |
| 1244 | struct elf_link_hash_entry **sym_hashes; |
| 1245 | bfd_signed_vma *local_got_refcounts; |
| 1246 | const Elf_Internal_Rela *rel; |
| 1247 | const Elf_Internal_Rela *rel_end; |
| 1248 | struct elf32_hppa_link_hash_table *hplink; |
| 1249 | asection *sreloc; |
| 1250 | asection *stubreloc; |
| 1251 | |
| 1252 | if (info->relocateable) |
| 1253 | return true; |
| 1254 | |
| 1255 | hplink = hppa_link_hash_table (info); |
| 1256 | dynobj = hplink->root.dynobj; |
| 1257 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1258 | sym_hashes = elf_sym_hashes (abfd); |
| 1259 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1260 | sreloc = NULL; |
| 1261 | stubreloc = NULL; |
| 1262 | |
| 1263 | rel_end = relocs + sec->reloc_count; |
| 1264 | for (rel = relocs; rel < rel_end; rel++) |
| 1265 | { |
| 1266 | enum { |
| 1267 | NEED_GOT = 1, |
| 1268 | NEED_PLT = 2, |
| 1269 | NEED_DYNREL = 4, |
| 1270 | #if LONG_BRANCH_PIC_IN_SHLIB |
| 1271 | NEED_STUBREL = 0, /* We won't be needing them in this case. */ |
| 1272 | #else |
| 1273 | NEED_STUBREL = 8, |
| 1274 | #endif |
| 1275 | PLT_PLABEL = 16 |
| 1276 | }; |
| 1277 | |
| 1278 | unsigned int r_symndx, r_type; |
| 1279 | struct elf32_hppa_link_hash_entry *h; |
| 1280 | int need_entry; |
| 1281 | |
| 1282 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1283 | |
| 1284 | if (r_symndx < symtab_hdr->sh_info) |
| 1285 | h = NULL; |
| 1286 | else |
| 1287 | h = ((struct elf32_hppa_link_hash_entry *) |
| 1288 | sym_hashes[r_symndx - symtab_hdr->sh_info]); |
| 1289 | |
| 1290 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1291 | |
| 1292 | switch (r_type) |
| 1293 | { |
| 1294 | case R_PARISC_DLTIND14F: |
| 1295 | case R_PARISC_DLTIND14R: |
| 1296 | case R_PARISC_DLTIND21L: |
| 1297 | /* This symbol requires a global offset table entry. */ |
| 1298 | need_entry = NEED_GOT; |
| 1299 | |
| 1300 | /* Mark this section as containing PIC code. */ |
| 1301 | sec->flags |= SEC_HAS_GOT_REF; |
| 1302 | break; |
| 1303 | |
| 1304 | case R_PARISC_PLABEL14R: /* "Official" procedure labels. */ |
| 1305 | case R_PARISC_PLABEL21L: |
| 1306 | case R_PARISC_PLABEL32: |
| 1307 | /* If the addend is non-zero, we break badly. */ |
| 1308 | if (rel->r_addend != 0) |
| 1309 | abort (); |
| 1310 | |
| 1311 | /* If we are creating a shared library, then we need to |
| 1312 | create a PLT entry for all PLABELs, because PLABELs with |
| 1313 | local symbols may be passed via a pointer to another |
| 1314 | object. Additionally, output a dynamic relocation |
| 1315 | pointing to the PLT entry. |
| 1316 | For executables, the original 32-bit ABI allowed two |
| 1317 | different styles of PLABELs (function pointers): For |
| 1318 | global functions, the PLABEL word points into the .plt |
| 1319 | two bytes past a (function address, gp) pair, and for |
| 1320 | local functions the PLABEL points directly at the |
| 1321 | function. The magic +2 for the first type allows us to |
| 1322 | differentiate between the two. As you can imagine, this |
| 1323 | is a real pain when it comes to generating code to call |
| 1324 | functions indirectly or to compare function pointers. |
| 1325 | We avoid the mess by always pointing a PLABEL into the |
| 1326 | .plt, even for local functions. */ |
| 1327 | need_entry = PLT_PLABEL | NEED_PLT | NEED_DYNREL; |
| 1328 | break; |
| 1329 | |
| 1330 | case R_PARISC_PCREL12F: |
| 1331 | hplink->has_12bit_branch = 1; |
| 1332 | /* Fall thru. */ |
| 1333 | case R_PARISC_PCREL17C: |
| 1334 | case R_PARISC_PCREL17F: |
| 1335 | hplink->has_17bit_branch = 1; |
| 1336 | /* Fall thru. */ |
| 1337 | case R_PARISC_PCREL22F: |
| 1338 | /* Function calls might need to go through the .plt, and |
| 1339 | might require long branch stubs. */ |
| 1340 | if (h == NULL) |
| 1341 | { |
| 1342 | /* We know local syms won't need a .plt entry, and if |
| 1343 | they need a long branch stub we can't guarantee that |
| 1344 | we can reach the stub. So just flag an error later |
| 1345 | if we're doing a shared link and find we need a long |
| 1346 | branch stub. */ |
| 1347 | continue; |
| 1348 | } |
| 1349 | else |
| 1350 | { |
| 1351 | /* Global symbols will need a .plt entry if they remain |
| 1352 | global, and in most cases won't need a long branch |
| 1353 | stub. Unfortunately, we have to cater for the case |
| 1354 | where a symbol is forced local by versioning, or due |
| 1355 | to symbolic linking, and we lose the .plt entry. */ |
| 1356 | need_entry = NEED_PLT | NEED_STUBREL; |
| 1357 | if (h->elf.type == STT_PARISC_MILLI) |
| 1358 | need_entry = NEED_STUBREL; |
| 1359 | } |
| 1360 | break; |
| 1361 | |
| 1362 | case R_PARISC_SEGBASE: /* Used to set segment base. */ |
| 1363 | case R_PARISC_SEGREL32: /* Relative reloc, used for unwind. */ |
| 1364 | case R_PARISC_PCREL14F: /* PC relative load/store. */ |
| 1365 | case R_PARISC_PCREL14R: |
| 1366 | case R_PARISC_PCREL17R: /* External branches. */ |
| 1367 | case R_PARISC_PCREL21L: /* As above, and for load/store too. */ |
| 1368 | /* We don't need to propagate the relocation if linking a |
| 1369 | shared object since these are section relative. */ |
| 1370 | continue; |
| 1371 | |
| 1372 | case R_PARISC_DPREL14F: /* Used for gp rel data load/store. */ |
| 1373 | case R_PARISC_DPREL14R: |
| 1374 | case R_PARISC_DPREL21L: |
| 1375 | if (info->shared) |
| 1376 | { |
| 1377 | (*_bfd_error_handler) |
| 1378 | (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"), |
| 1379 | bfd_get_filename (abfd), |
| 1380 | elf_hppa_howto_table[r_type].name); |
| 1381 | bfd_set_error (bfd_error_bad_value); |
| 1382 | return false; |
| 1383 | } |
| 1384 | /* Fall through. */ |
| 1385 | |
| 1386 | case R_PARISC_DIR17F: /* Used for external branches. */ |
| 1387 | case R_PARISC_DIR17R: |
| 1388 | case R_PARISC_DIR14F: /* Used for load/store from absolute locn. */ |
| 1389 | case R_PARISC_DIR14R: |
| 1390 | case R_PARISC_DIR21L: /* As above, and for ext branches too. */ |
| 1391 | #if 1 |
| 1392 | /* Help debug shared library creation. Any of the above |
| 1393 | relocs can be used in shared libs, but they may cause |
| 1394 | pages to become unshared. */ |
| 1395 | if (info->shared) |
| 1396 | { |
| 1397 | (*_bfd_error_handler) |
| 1398 | (_("%s: relocation %s should not be used when making a shared object; recompile with -fPIC"), |
| 1399 | bfd_get_filename (abfd), |
| 1400 | elf_hppa_howto_table[r_type].name); |
| 1401 | } |
| 1402 | /* Fall through. */ |
| 1403 | #endif |
| 1404 | |
| 1405 | case R_PARISC_DIR32: /* .word relocs. */ |
| 1406 | /* We may want to output a dynamic relocation later. */ |
| 1407 | need_entry = NEED_DYNREL; |
| 1408 | break; |
| 1409 | |
| 1410 | /* This relocation describes the C++ object vtable hierarchy. |
| 1411 | Reconstruct it for later use during GC. */ |
| 1412 | case R_PARISC_GNU_VTINHERIT: |
| 1413 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, |
| 1414 | &h->elf, rel->r_offset)) |
| 1415 | return false; |
| 1416 | continue; |
| 1417 | |
| 1418 | /* This relocation describes which C++ vtable entries are actually |
| 1419 | used. Record for later use during GC. */ |
| 1420 | case R_PARISC_GNU_VTENTRY: |
| 1421 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, |
| 1422 | &h->elf, rel->r_addend)) |
| 1423 | return false; |
| 1424 | continue; |
| 1425 | |
| 1426 | default: |
| 1427 | continue; |
| 1428 | } |
| 1429 | |
| 1430 | /* Now carry out our orders. */ |
| 1431 | if (need_entry & NEED_GOT) |
| 1432 | { |
| 1433 | /* Allocate space for a GOT entry, as well as a dynamic |
| 1434 | relocation for this entry. */ |
| 1435 | if (dynobj == NULL) |
| 1436 | hplink->root.dynobj = dynobj = abfd; |
| 1437 | |
| 1438 | if (hplink->sgot == NULL) |
| 1439 | { |
| 1440 | if (! elf32_hppa_create_dynamic_sections (dynobj, info)) |
| 1441 | return false; |
| 1442 | } |
| 1443 | |
| 1444 | if (h != NULL) |
| 1445 | { |
| 1446 | if (h->elf.got.refcount == -1) |
| 1447 | h->elf.got.refcount = 1; |
| 1448 | else |
| 1449 | h->elf.got.refcount += 1; |
| 1450 | } |
| 1451 | else |
| 1452 | { |
| 1453 | /* This is a global offset table entry for a local symbol. */ |
| 1454 | if (local_got_refcounts == NULL) |
| 1455 | { |
| 1456 | bfd_size_type size; |
| 1457 | |
| 1458 | /* Allocate space for local got offsets and local |
| 1459 | plt offsets. Done this way to save polluting |
| 1460 | elf_obj_tdata with another target specific |
| 1461 | pointer. */ |
| 1462 | size = symtab_hdr->sh_info; |
| 1463 | size *= 2 * sizeof (bfd_signed_vma); |
| 1464 | local_got_refcounts = ((bfd_signed_vma *) |
| 1465 | bfd_alloc (abfd, size)); |
| 1466 | if (local_got_refcounts == NULL) |
| 1467 | return false; |
| 1468 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 1469 | memset (local_got_refcounts, -1, (size_t) size); |
| 1470 | } |
| 1471 | if (local_got_refcounts[r_symndx] == -1) |
| 1472 | local_got_refcounts[r_symndx] = 1; |
| 1473 | else |
| 1474 | local_got_refcounts[r_symndx] += 1; |
| 1475 | } |
| 1476 | } |
| 1477 | |
| 1478 | if (need_entry & NEED_PLT) |
| 1479 | { |
| 1480 | /* If we are creating a shared library, and this is a reloc |
| 1481 | against a weak symbol or a global symbol in a dynamic |
| 1482 | object, then we will be creating an import stub and a |
| 1483 | .plt entry for the symbol. Similarly, on a normal link |
| 1484 | to symbols defined in a dynamic object we'll need the |
| 1485 | import stub and a .plt entry. We don't know yet whether |
| 1486 | the symbol is defined or not, so make an entry anyway and |
| 1487 | clean up later in adjust_dynamic_symbol. */ |
| 1488 | if ((sec->flags & SEC_ALLOC) != 0) |
| 1489 | { |
| 1490 | if (h != NULL) |
| 1491 | { |
| 1492 | if (h->elf.plt.refcount == -1) |
| 1493 | { |
| 1494 | h->elf.plt.refcount = 1; |
| 1495 | h->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 1496 | } |
| 1497 | else |
| 1498 | h->elf.plt.refcount += 1; |
| 1499 | |
| 1500 | /* If this .plt entry is for a plabel, mark it so |
| 1501 | that adjust_dynamic_symbol will keep the entry |
| 1502 | even if it appears to be local. */ |
| 1503 | if (need_entry & PLT_PLABEL) |
| 1504 | h->plabel = 1; |
| 1505 | } |
| 1506 | else if (need_entry & PLT_PLABEL) |
| 1507 | { |
| 1508 | bfd_signed_vma *local_plt_refcounts; |
| 1509 | |
| 1510 | if (local_got_refcounts == NULL) |
| 1511 | { |
| 1512 | bfd_size_type size; |
| 1513 | |
| 1514 | /* Allocate space for local got offsets and local |
| 1515 | plt offsets. */ |
| 1516 | size = symtab_hdr->sh_info; |
| 1517 | size *= 2 * sizeof (bfd_signed_vma); |
| 1518 | local_got_refcounts = ((bfd_signed_vma *) |
| 1519 | bfd_alloc (abfd, size)); |
| 1520 | if (local_got_refcounts == NULL) |
| 1521 | return false; |
| 1522 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 1523 | memset (local_got_refcounts, -1, (size_t) size); |
| 1524 | } |
| 1525 | local_plt_refcounts = (local_got_refcounts |
| 1526 | + symtab_hdr->sh_info); |
| 1527 | if (local_plt_refcounts[r_symndx] == -1) |
| 1528 | local_plt_refcounts[r_symndx] = 1; |
| 1529 | else |
| 1530 | local_plt_refcounts[r_symndx] += 1; |
| 1531 | } |
| 1532 | } |
| 1533 | } |
| 1534 | |
| 1535 | if (need_entry & (NEED_DYNREL | NEED_STUBREL)) |
| 1536 | { |
| 1537 | /* Flag this symbol as having a non-got, non-plt reference |
| 1538 | so that we generate copy relocs if it turns out to be |
| 1539 | dynamic. */ |
| 1540 | if (need_entry == NEED_DYNREL |
| 1541 | && h != NULL |
| 1542 | && !info->shared |
| 1543 | && (sec->flags & SEC_READONLY) != 0) |
| 1544 | h->elf.elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; |
| 1545 | |
| 1546 | /* If we are creating a shared library then we need to copy |
| 1547 | the reloc into the shared library. However, if we are |
| 1548 | linking with -Bsymbolic, we need only copy absolute |
| 1549 | relocs or relocs against symbols that are not defined in |
| 1550 | an object we are including in the link. PC- or DP- or |
| 1551 | DLT-relative relocs against any local sym or global sym |
| 1552 | with DEF_REGULAR set, can be discarded. At this point we |
| 1553 | have not seen all the input files, so it is possible that |
| 1554 | DEF_REGULAR is not set now but will be set later (it is |
| 1555 | never cleared). We account for that possibility below by |
| 1556 | storing information in the reloc_entries field of the |
| 1557 | hash table entry. |
| 1558 | |
| 1559 | A similar situation to the -Bsymbolic case occurs when |
| 1560 | creating shared libraries and symbol visibility changes |
| 1561 | render the symbol local. |
| 1562 | |
| 1563 | As it turns out, all the relocs we will be creating here |
| 1564 | are absolute, so we cannot remove them on -Bsymbolic |
| 1565 | links or visibility changes anyway. A STUB_REL reloc |
| 1566 | is absolute too, as in that case it is the reloc in the |
| 1567 | stub we will be creating, rather than copying the PCREL |
| 1568 | reloc in the branch. |
| 1569 | |
| 1570 | If on the other hand, we are creating an executable, we |
| 1571 | may need to keep relocations for symbols satisfied by a |
| 1572 | dynamic library if we manage to avoid copy relocs for the |
| 1573 | symbol. */ |
| 1574 | if ((info->shared |
| 1575 | && (sec->flags & SEC_ALLOC) != 0 |
| 1576 | && (IS_ABSOLUTE_RELOC (r_type) |
| 1577 | || (h != NULL |
| 1578 | && (!info->symbolic |
| 1579 | || h->elf.root.type == bfd_link_hash_defweak |
| 1580 | || (h->elf.elf_link_hash_flags |
| 1581 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| 1582 | || (!info->shared |
| 1583 | && (sec->flags & SEC_ALLOC) != 0 |
| 1584 | && h != NULL |
| 1585 | && (h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| 1586 | && (h->elf.root.type == bfd_link_hash_defweak |
| 1587 | || (h->elf.elf_link_hash_flags |
| 1588 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) |
| 1589 | { |
| 1590 | boolean doit; |
| 1591 | asection *srel; |
| 1592 | |
| 1593 | srel = sreloc; |
| 1594 | if ((need_entry & NEED_STUBREL)) |
| 1595 | srel = stubreloc; |
| 1596 | |
| 1597 | /* Create a reloc section in dynobj and make room for |
| 1598 | this reloc. */ |
| 1599 | if (srel == NULL) |
| 1600 | { |
| 1601 | char *name; |
| 1602 | |
| 1603 | if (dynobj == NULL) |
| 1604 | hplink->root.dynobj = dynobj = abfd; |
| 1605 | |
| 1606 | name = bfd_elf_string_from_elf_section |
| 1607 | (abfd, |
| 1608 | elf_elfheader (abfd)->e_shstrndx, |
| 1609 | elf_section_data (sec)->rel_hdr.sh_name); |
| 1610 | if (name == NULL) |
| 1611 | { |
| 1612 | (*_bfd_error_handler) |
| 1613 | (_("Could not find relocation section for %s"), |
| 1614 | sec->name); |
| 1615 | bfd_set_error (bfd_error_bad_value); |
| 1616 | return false; |
| 1617 | } |
| 1618 | |
| 1619 | if ((need_entry & NEED_STUBREL)) |
| 1620 | { |
| 1621 | bfd_size_type len = strlen (name) + sizeof (STUB_SUFFIX); |
| 1622 | char *newname = bfd_malloc (len); |
| 1623 | |
| 1624 | if (newname == NULL) |
| 1625 | return false; |
| 1626 | strcpy (newname, name); |
| 1627 | strcpy (newname + len - sizeof (STUB_SUFFIX), |
| 1628 | STUB_SUFFIX); |
| 1629 | name = newname; |
| 1630 | } |
| 1631 | |
| 1632 | srel = bfd_get_section_by_name (dynobj, name); |
| 1633 | if (srel == NULL) |
| 1634 | { |
| 1635 | flagword flags; |
| 1636 | |
| 1637 | srel = bfd_make_section (dynobj, name); |
| 1638 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| 1639 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 1640 | if ((sec->flags & SEC_ALLOC) != 0) |
| 1641 | flags |= SEC_ALLOC | SEC_LOAD; |
| 1642 | if (srel == NULL |
| 1643 | || !bfd_set_section_flags (dynobj, srel, flags) |
| 1644 | || !bfd_set_section_alignment (dynobj, srel, 2)) |
| 1645 | return false; |
| 1646 | } |
| 1647 | else if ((need_entry & NEED_STUBREL)) |
| 1648 | free (name); |
| 1649 | |
| 1650 | if ((need_entry & NEED_STUBREL)) |
| 1651 | stubreloc = srel; |
| 1652 | else |
| 1653 | sreloc = srel; |
| 1654 | } |
| 1655 | |
| 1656 | #if ! LONG_BRANCH_PIC_IN_SHLIB |
| 1657 | /* If this is a function call, we only need one dynamic |
| 1658 | reloc for the stub as all calls to a particular |
| 1659 | function will go through the same stub. Actually, a |
| 1660 | long branch stub needs two relocations, but we count |
| 1661 | on some intelligence on the part of the dynamic |
| 1662 | linker. */ |
| 1663 | if ((need_entry & NEED_STUBREL)) |
| 1664 | { |
| 1665 | doit = h->stub_reloc_sec != stubreloc; |
| 1666 | h->stub_reloc_sec = stubreloc; |
| 1667 | } |
| 1668 | else |
| 1669 | #endif |
| 1670 | doit = 1; |
| 1671 | |
| 1672 | if (doit) |
| 1673 | { |
| 1674 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 1675 | |
| 1676 | /* Keep track of relocations we have entered for |
| 1677 | this global symbol, so that we can discard them |
| 1678 | later if necessary. */ |
| 1679 | if (!info->shared |
| 1680 | || (h != NULL |
| 1681 | && (! IS_ABSOLUTE_RELOC (rtype) |
| 1682 | || (need_entry & NEED_STUBREL)))) |
| 1683 | { |
| 1684 | struct elf32_hppa_dyn_reloc_entry *p; |
| 1685 | |
| 1686 | for (p = h->reloc_entries; p != NULL; p = p->next) |
| 1687 | if (p->section == srel) |
| 1688 | break; |
| 1689 | |
| 1690 | if (p == NULL) |
| 1691 | { |
| 1692 | p = ((struct elf32_hppa_dyn_reloc_entry *) |
| 1693 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
| 1694 | if (p == NULL) |
| 1695 | return false; |
| 1696 | p->next = h->reloc_entries; |
| 1697 | h->reloc_entries = p; |
| 1698 | p->section = srel; |
| 1699 | p->count = 0; |
| 1700 | } |
| 1701 | |
| 1702 | /* NEED_STUBREL and NEED_DYNREL are never both |
| 1703 | set. Leave the count at zero for the |
| 1704 | NEED_STUBREL case as we only ever have one |
| 1705 | stub reloc per section per symbol, and this |
| 1706 | simplifies code to discard unneeded relocs. */ |
| 1707 | if (! (need_entry & NEED_STUBREL)) |
| 1708 | ++p->count; |
| 1709 | } |
| 1710 | } |
| 1711 | } |
| 1712 | } |
| 1713 | } |
| 1714 | |
| 1715 | return true; |
| 1716 | } |
| 1717 | |
| 1718 | /* Return the section that should be marked against garbage collection |
| 1719 | for a given relocation. */ |
| 1720 | |
| 1721 | static asection * |
| 1722 | elf32_hppa_gc_mark_hook (abfd, info, rel, h, sym) |
| 1723 | bfd *abfd; |
| 1724 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1725 | Elf_Internal_Rela *rel; |
| 1726 | struct elf_link_hash_entry *h; |
| 1727 | Elf_Internal_Sym *sym; |
| 1728 | { |
| 1729 | if (h != NULL) |
| 1730 | { |
| 1731 | switch ((unsigned int) ELF32_R_TYPE (rel->r_info)) |
| 1732 | { |
| 1733 | case R_PARISC_GNU_VTINHERIT: |
| 1734 | case R_PARISC_GNU_VTENTRY: |
| 1735 | break; |
| 1736 | |
| 1737 | default: |
| 1738 | switch (h->root.type) |
| 1739 | { |
| 1740 | case bfd_link_hash_defined: |
| 1741 | case bfd_link_hash_defweak: |
| 1742 | return h->root.u.def.section; |
| 1743 | |
| 1744 | case bfd_link_hash_common: |
| 1745 | return h->root.u.c.p->section; |
| 1746 | |
| 1747 | default: |
| 1748 | break; |
| 1749 | } |
| 1750 | } |
| 1751 | } |
| 1752 | else |
| 1753 | { |
| 1754 | if (!(elf_bad_symtab (abfd) |
| 1755 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) |
| 1756 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) |
| 1757 | && sym->st_shndx != SHN_COMMON)) |
| 1758 | { |
| 1759 | return bfd_section_from_elf_index (abfd, sym->st_shndx); |
| 1760 | } |
| 1761 | } |
| 1762 | |
| 1763 | return NULL; |
| 1764 | } |
| 1765 | |
| 1766 | /* Update the got and plt entry reference counts for the section being |
| 1767 | removed. */ |
| 1768 | |
| 1769 | static boolean |
| 1770 | elf32_hppa_gc_sweep_hook (abfd, info, sec, relocs) |
| 1771 | bfd *abfd; |
| 1772 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1773 | asection *sec; |
| 1774 | const Elf_Internal_Rela *relocs; |
| 1775 | { |
| 1776 | Elf_Internal_Shdr *symtab_hdr; |
| 1777 | struct elf_link_hash_entry **sym_hashes; |
| 1778 | bfd_signed_vma *local_got_refcounts; |
| 1779 | bfd_signed_vma *local_plt_refcounts; |
| 1780 | const Elf_Internal_Rela *rel, *relend; |
| 1781 | unsigned long r_symndx; |
| 1782 | struct elf_link_hash_entry *h; |
| 1783 | struct elf32_hppa_link_hash_table *hplink; |
| 1784 | bfd *dynobj; |
| 1785 | |
| 1786 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1787 | sym_hashes = elf_sym_hashes (abfd); |
| 1788 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1789 | local_plt_refcounts = local_got_refcounts; |
| 1790 | if (local_plt_refcounts != NULL) |
| 1791 | local_plt_refcounts += symtab_hdr->sh_info; |
| 1792 | hplink = hppa_link_hash_table (info); |
| 1793 | dynobj = hplink->root.dynobj; |
| 1794 | if (dynobj == NULL) |
| 1795 | return true; |
| 1796 | |
| 1797 | relend = relocs + sec->reloc_count; |
| 1798 | for (rel = relocs; rel < relend; rel++) |
| 1799 | switch ((unsigned int) ELF32_R_TYPE (rel->r_info)) |
| 1800 | { |
| 1801 | case R_PARISC_DLTIND14F: |
| 1802 | case R_PARISC_DLTIND14R: |
| 1803 | case R_PARISC_DLTIND21L: |
| 1804 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1805 | if (r_symndx >= symtab_hdr->sh_info) |
| 1806 | { |
| 1807 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1808 | if (h->got.refcount > 0) |
| 1809 | h->got.refcount -= 1; |
| 1810 | } |
| 1811 | else if (local_got_refcounts != NULL) |
| 1812 | { |
| 1813 | if (local_got_refcounts[r_symndx] > 0) |
| 1814 | local_got_refcounts[r_symndx] -= 1; |
| 1815 | } |
| 1816 | break; |
| 1817 | |
| 1818 | case R_PARISC_PCREL12F: |
| 1819 | case R_PARISC_PCREL17C: |
| 1820 | case R_PARISC_PCREL17F: |
| 1821 | case R_PARISC_PCREL22F: |
| 1822 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1823 | if (r_symndx >= symtab_hdr->sh_info) |
| 1824 | { |
| 1825 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1826 | if (h->plt.refcount > 0) |
| 1827 | h->plt.refcount -= 1; |
| 1828 | } |
| 1829 | break; |
| 1830 | |
| 1831 | case R_PARISC_PLABEL14R: |
| 1832 | case R_PARISC_PLABEL21L: |
| 1833 | case R_PARISC_PLABEL32: |
| 1834 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1835 | if (r_symndx >= symtab_hdr->sh_info) |
| 1836 | { |
| 1837 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1838 | if (h->plt.refcount > 0) |
| 1839 | h->plt.refcount -= 1; |
| 1840 | } |
| 1841 | else if (local_plt_refcounts != NULL) |
| 1842 | { |
| 1843 | if (local_plt_refcounts[r_symndx] > 0) |
| 1844 | local_plt_refcounts[r_symndx] -= 1; |
| 1845 | } |
| 1846 | break; |
| 1847 | |
| 1848 | default: |
| 1849 | break; |
| 1850 | } |
| 1851 | |
| 1852 | return true; |
| 1853 | } |
| 1854 | |
| 1855 | /* Our own version of hide_symbol, so that we can keep plt entries for |
| 1856 | plabels. */ |
| 1857 | |
| 1858 | static void |
| 1859 | elf32_hppa_hide_symbol (info, h) |
| 1860 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1861 | struct elf_link_hash_entry *h; |
| 1862 | { |
| 1863 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) |
| 1864 | h->dynindx = -1; |
| 1865 | if (! ((struct elf32_hppa_link_hash_entry *) h)->plabel) |
| 1866 | { |
| 1867 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 1868 | h->plt.offset = (bfd_vma) -1; |
| 1869 | } |
| 1870 | } |
| 1871 | |
| 1872 | /* This is the condition under which elf32_hppa_finish_dynamic_symbol |
| 1873 | will be called from elflink.h. If elflink.h doesn't call our |
| 1874 | finish_dynamic_symbol routine, we'll need to do something about |
| 1875 | initializing any .plt and .got entries in elf32_hppa_relocate_section. */ |
| 1876 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ |
| 1877 | ((DYN) \ |
| 1878 | && ((INFO)->shared \ |
| 1879 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ |
| 1880 | && ((H)->dynindx != -1 \ |
| 1881 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) |
| 1882 | |
| 1883 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1884 | regular object. The current definition is in some section of the |
| 1885 | dynamic object, but we're not including those sections. We have to |
| 1886 | change the definition to something the rest of the link can |
| 1887 | understand. */ |
| 1888 | |
| 1889 | static boolean |
| 1890 | elf32_hppa_adjust_dynamic_symbol (info, h) |
| 1891 | struct bfd_link_info *info; |
| 1892 | struct elf_link_hash_entry *h; |
| 1893 | { |
| 1894 | bfd *dynobj; |
| 1895 | struct elf32_hppa_link_hash_table *hplink; |
| 1896 | asection *s; |
| 1897 | |
| 1898 | hplink = hppa_link_hash_table (info); |
| 1899 | dynobj = hplink->root.dynobj; |
| 1900 | |
| 1901 | /* If this is a function, put it in the procedure linkage table. We |
| 1902 | will fill in the contents of the procedure linkage table later, |
| 1903 | when we know the address of the .got section. */ |
| 1904 | if (h->type == STT_FUNC |
| 1905 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 1906 | { |
| 1907 | if (!info->shared |
| 1908 | && h->plt.refcount > 0 |
| 1909 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
| 1910 | && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0) |
| 1911 | { |
| 1912 | ((struct elf32_hppa_link_hash_entry *) h)->maybe_pic_call = 1; |
| 1913 | } |
| 1914 | |
| 1915 | if (h->plt.refcount <= 0 |
| 1916 | || ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
| 1917 | && h->root.type != bfd_link_hash_defweak |
| 1918 | && ! ((struct elf32_hppa_link_hash_entry *) h)->plabel |
| 1919 | && (!info->shared || info->symbolic))) |
| 1920 | { |
| 1921 | /* The .plt entry is not needed when: |
| 1922 | a) Garbage collection has removed all references to the |
| 1923 | symbol, or |
| 1924 | b) We know for certain the symbol is defined in this |
| 1925 | object, and it's not a weak definition, nor is the symbol |
| 1926 | used by a plabel relocation. Either this object is the |
| 1927 | application or we are doing a shared symbolic link. */ |
| 1928 | |
| 1929 | /* As a special sop to the hppa ABI, we keep a .plt entry |
| 1930 | for functions in sections containing PIC code. */ |
| 1931 | if (((struct elf32_hppa_link_hash_entry *) h)->maybe_pic_call) |
| 1932 | ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1; |
| 1933 | else |
| 1934 | { |
| 1935 | h->plt.offset = (bfd_vma) -1; |
| 1936 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 1937 | } |
| 1938 | } |
| 1939 | |
| 1940 | return true; |
| 1941 | } |
| 1942 | |
| 1943 | /* If this is a weak symbol, and there is a real definition, the |
| 1944 | processor independent code will have arranged for us to see the |
| 1945 | real definition first, and we can just use the same value. */ |
| 1946 | if (h->weakdef != NULL) |
| 1947 | { |
| 1948 | if (h->weakdef->root.type != bfd_link_hash_defined |
| 1949 | && h->weakdef->root.type != bfd_link_hash_defweak) |
| 1950 | abort (); |
| 1951 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 1952 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 1953 | return true; |
| 1954 | } |
| 1955 | |
| 1956 | /* This is a reference to a symbol defined by a dynamic object which |
| 1957 | is not a function. */ |
| 1958 | |
| 1959 | /* If we are creating a shared library, we must presume that the |
| 1960 | only references to the symbol are via the global offset table. |
| 1961 | For such cases we need not do anything here; the relocations will |
| 1962 | be handled correctly by relocate_section. */ |
| 1963 | if (info->shared) |
| 1964 | return true; |
| 1965 | |
| 1966 | /* If there are no references to this symbol that do not use the |
| 1967 | GOT, we don't need to generate a copy reloc. */ |
| 1968 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) |
| 1969 | return true; |
| 1970 | |
| 1971 | /* We must allocate the symbol in our .dynbss section, which will |
| 1972 | become part of the .bss section of the executable. There will be |
| 1973 | an entry for this symbol in the .dynsym section. The dynamic |
| 1974 | object will contain position independent code, so all references |
| 1975 | from the dynamic object to this symbol will go through the global |
| 1976 | offset table. The dynamic linker will use the .dynsym entry to |
| 1977 | determine the address it must put in the global offset table, so |
| 1978 | both the dynamic object and the regular object will refer to the |
| 1979 | same memory location for the variable. */ |
| 1980 | |
| 1981 | s = hplink->sdynbss; |
| 1982 | |
| 1983 | /* We must generate a COPY reloc to tell the dynamic linker to |
| 1984 | copy the initial value out of the dynamic object and into the |
| 1985 | runtime process image. We need to remember the offset into the |
| 1986 | .rela.bss section we are going to use. */ |
| 1987 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 1988 | { |
| 1989 | asection *srel; |
| 1990 | |
| 1991 | srel = hplink->srelbss; |
| 1992 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 1993 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| 1994 | } |
| 1995 | |
| 1996 | { |
| 1997 | /* We need to figure out the alignment required for this symbol. I |
| 1998 | have no idea how other ELF linkers handle this. */ |
| 1999 | unsigned int power_of_two; |
| 2000 | |
| 2001 | power_of_two = bfd_log2 (h->size); |
| 2002 | if (power_of_two > 3) |
| 2003 | power_of_two = 3; |
| 2004 | |
| 2005 | /* Apply the required alignment. */ |
| 2006 | s->_raw_size = BFD_ALIGN (s->_raw_size, |
| 2007 | (bfd_size_type) (1 << power_of_two)); |
| 2008 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 2009 | { |
| 2010 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 2011 | return false; |
| 2012 | } |
| 2013 | } |
| 2014 | /* Define the symbol as being at this point in the section. */ |
| 2015 | h->root.u.def.section = s; |
| 2016 | h->root.u.def.value = s->_raw_size; |
| 2017 | |
| 2018 | /* Increment the section size to make room for the symbol. */ |
| 2019 | s->_raw_size += h->size; |
| 2020 | |
| 2021 | return true; |
| 2022 | } |
| 2023 | |
| 2024 | /* Called via elf_link_hash_traverse to create .plt entries for an |
| 2025 | application that uses statically linked PIC functions. Similar to |
| 2026 | the first part of elf32_hppa_adjust_dynamic_symbol. */ |
| 2027 | |
| 2028 | static boolean |
| 2029 | hppa_handle_PIC_calls (h, inf) |
| 2030 | struct elf_link_hash_entry *h; |
| 2031 | PTR inf ATTRIBUTE_UNUSED; |
| 2032 | { |
| 2033 | if (! (h->plt.refcount > 0 |
| 2034 | && (h->root.type == bfd_link_hash_defined |
| 2035 | || h->root.type == bfd_link_hash_defweak) |
| 2036 | && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0)) |
| 2037 | { |
| 2038 | h->plt.offset = (bfd_vma) -1; |
| 2039 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 2040 | return true; |
| 2041 | } |
| 2042 | |
| 2043 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 2044 | ((struct elf32_hppa_link_hash_entry *) h)->maybe_pic_call = 1; |
| 2045 | ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1; |
| 2046 | |
| 2047 | return true; |
| 2048 | } |
| 2049 | |
| 2050 | /* Allocate space in .plt, .got and associated reloc sections for |
| 2051 | global syms. */ |
| 2052 | |
| 2053 | static boolean |
| 2054 | allocate_plt_and_got_and_discard_relocs (h, inf) |
| 2055 | struct elf_link_hash_entry *h; |
| 2056 | PTR inf; |
| 2057 | { |
| 2058 | struct bfd_link_info *info; |
| 2059 | struct elf32_hppa_link_hash_table *hplink; |
| 2060 | asection *s; |
| 2061 | struct elf32_hppa_link_hash_entry *eh; |
| 2062 | |
| 2063 | if (h->root.type == bfd_link_hash_indirect |
| 2064 | || h->root.type == bfd_link_hash_warning) |
| 2065 | return true; |
| 2066 | |
| 2067 | info = (struct bfd_link_info *) inf; |
| 2068 | hplink = hppa_link_hash_table (info); |
| 2069 | if ((hplink->root.dynamic_sections_created |
| 2070 | && h->plt.refcount > 0) |
| 2071 | || ((struct elf32_hppa_link_hash_entry *) h)->pic_call) |
| 2072 | { |
| 2073 | /* Make sure this symbol is output as a dynamic symbol. |
| 2074 | Undefined weak syms won't yet be marked as dynamic. */ |
| 2075 | if (h->dynindx == -1 |
| 2076 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 |
| 2077 | && h->type != STT_PARISC_MILLI |
| 2078 | && !((struct elf32_hppa_link_hash_entry *) h)->pic_call) |
| 2079 | { |
| 2080 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 2081 | return false; |
| 2082 | } |
| 2083 | |
| 2084 | /* Make an entry in the .plt section. */ |
| 2085 | s = hplink->splt; |
| 2086 | h->plt.offset = s->_raw_size; |
| 2087 | if (PLABEL_PLT_ENTRY_SIZE != PLT_ENTRY_SIZE |
| 2088 | && ((struct elf32_hppa_link_hash_entry *) h)->plabel |
| 2089 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| 2090 | { |
| 2091 | /* Add some extra space for the dynamic linker to use. */ |
| 2092 | s->_raw_size += PLABEL_PLT_ENTRY_SIZE; |
| 2093 | } |
| 2094 | else |
| 2095 | s->_raw_size += PLT_ENTRY_SIZE; |
| 2096 | |
| 2097 | if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call |
| 2098 | && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) |
| 2099 | { |
| 2100 | /* We also need to make an entry in the .rela.plt section. */ |
| 2101 | hplink->srelplt->_raw_size += sizeof (Elf32_External_Rela); |
| 2102 | hplink->need_plt_stub = 1; |
| 2103 | } |
| 2104 | } |
| 2105 | else |
| 2106 | { |
| 2107 | h->plt.offset = (bfd_vma) -1; |
| 2108 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 2109 | } |
| 2110 | |
| 2111 | if (h->got.refcount > 0) |
| 2112 | { |
| 2113 | boolean dyn; |
| 2114 | |
| 2115 | /* Make sure this symbol is output as a dynamic symbol. |
| 2116 | Undefined weak syms won't yet be marked as dynamic. */ |
| 2117 | if (h->dynindx == -1 |
| 2118 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 |
| 2119 | && h->type != STT_PARISC_MILLI) |
| 2120 | { |
| 2121 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 2122 | return false; |
| 2123 | } |
| 2124 | |
| 2125 | s = hplink->sgot; |
| 2126 | h->got.offset = s->_raw_size; |
| 2127 | s->_raw_size += GOT_ENTRY_SIZE; |
| 2128 | dyn = hplink->root.dynamic_sections_created; |
| 2129 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) |
| 2130 | hplink->srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 2131 | } |
| 2132 | else |
| 2133 | h->got.offset = (bfd_vma) -1; |
| 2134 | |
| 2135 | /* If this is a -Bsymbolic shared link, then we need to discard all |
| 2136 | space allocated for dynamic relocs against symbols defined in a |
| 2137 | regular object. For the normal shared case, discard space for |
| 2138 | relocs that have become local due to symbol visibility changes. |
| 2139 | For the non-shared case, discard space for symbols which turn out |
| 2140 | to need copy relocs or are not dynamic. We also need to lose |
| 2141 | relocs we've allocated for long branch stubs if we know we won't |
| 2142 | be generating a stub. */ |
| 2143 | |
| 2144 | eh = (struct elf32_hppa_link_hash_entry *) h; |
| 2145 | if (eh->reloc_entries == NULL) |
| 2146 | return true; |
| 2147 | |
| 2148 | /* First handle the non-shared case. */ |
| 2149 | if (!info->shared |
| 2150 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| 2151 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 2152 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 2153 | || (hplink->root.dynamic_sections_created |
| 2154 | && (h->root.type == bfd_link_hash_undefweak |
| 2155 | || h->root.type == bfd_link_hash_undefined)))) |
| 2156 | { |
| 2157 | /* Make sure this symbol is output as a dynamic symbol. |
| 2158 | Undefined weak syms won't yet be marked as dynamic. */ |
| 2159 | if (h->dynindx == -1 |
| 2160 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 |
| 2161 | && h->type != STT_PARISC_MILLI) |
| 2162 | { |
| 2163 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 2164 | return false; |
| 2165 | } |
| 2166 | |
| 2167 | /* If that succeeded, we know we'll be keeping all the relocs. */ |
| 2168 | if (h->dynindx != -1) |
| 2169 | return true; |
| 2170 | } |
| 2171 | |
| 2172 | #if ! LONG_BRANCH_PIC_IN_SHLIB && LONG_BRANCH_VIA_PLT |
| 2173 | /* Handle the stub reloc case. If we have a plt entry for the |
| 2174 | function, we won't be needing long branch stubs. c->count will |
| 2175 | only be zero for stub relocs, which provides a handy way of |
| 2176 | flagging these relocs, and means we need do nothing special for |
| 2177 | the forced local and symbolic link case. */ |
| 2178 | if (eh->stub_reloc_sec != NULL |
| 2179 | && eh->elf.plt.offset != (bfd_vma) -1) |
| 2180 | { |
| 2181 | struct elf32_hppa_dyn_reloc_entry *c; |
| 2182 | |
| 2183 | for (c = eh->reloc_entries; c != NULL; c = c->next) |
| 2184 | if (c->count == 0) |
| 2185 | c->section->_raw_size -= sizeof (Elf32_External_Rela); |
| 2186 | } |
| 2187 | #endif |
| 2188 | |
| 2189 | /* Discard any relocs in the non-shared case. For the shared case, |
| 2190 | if a symbol has been forced local or we have found a regular |
| 2191 | definition for the symbolic link case, then we won't be needing |
| 2192 | any relocs. */ |
| 2193 | if (!info->shared |
| 2194 | || ((eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
| 2195 | && ((eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 |
| 2196 | || info->symbolic))) |
| 2197 | { |
| 2198 | struct elf32_hppa_dyn_reloc_entry *c; |
| 2199 | |
| 2200 | for (c = eh->reloc_entries; c != NULL; c = c->next) |
| 2201 | c->section->_raw_size -= c->count * sizeof (Elf32_External_Rela); |
| 2202 | } |
| 2203 | |
| 2204 | return true; |
| 2205 | } |
| 2206 | |
| 2207 | /* This function is called via elf_link_hash_traverse to force |
| 2208 | millicode symbols local so they do not end up as globals in the |
| 2209 | dynamic symbol table. We ought to be able to do this in |
| 2210 | adjust_dynamic_symbol, but our adjust_dynamic_symbol is not called |
| 2211 | for all dynamic symbols. Arguably, this is a bug in |
| 2212 | elf_adjust_dynamic_symbol. */ |
| 2213 | |
| 2214 | static boolean |
| 2215 | clobber_millicode_symbols (h, info) |
| 2216 | struct elf_link_hash_entry *h; |
| 2217 | struct bfd_link_info *info; |
| 2218 | { |
| 2219 | /* We only want to remove these from the dynamic symbol table. |
| 2220 | Therefore we do not leave ELF_LINK_FORCED_LOCAL set. */ |
| 2221 | if (h->type == STT_PARISC_MILLI) |
| 2222 | { |
| 2223 | unsigned short oldflags = h->elf_link_hash_flags; |
| 2224 | h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; |
| 2225 | elf32_hppa_hide_symbol (info, h); |
| 2226 | h->elf_link_hash_flags &= ~ELF_LINK_FORCED_LOCAL; |
| 2227 | h->elf_link_hash_flags |= oldflags & ELF_LINK_FORCED_LOCAL; |
| 2228 | } |
| 2229 | return true; |
| 2230 | } |
| 2231 | |
| 2232 | /* Set the sizes of the dynamic sections. */ |
| 2233 | |
| 2234 | static boolean |
| 2235 | elf32_hppa_size_dynamic_sections (output_bfd, info) |
| 2236 | bfd *output_bfd; |
| 2237 | struct bfd_link_info *info; |
| 2238 | { |
| 2239 | struct elf32_hppa_link_hash_table *hplink; |
| 2240 | bfd *dynobj; |
| 2241 | bfd *i; |
| 2242 | asection *s; |
| 2243 | boolean relocs; |
| 2244 | boolean reltext; |
| 2245 | |
| 2246 | hplink = hppa_link_hash_table (info); |
| 2247 | dynobj = hplink->root.dynobj; |
| 2248 | if (dynobj == NULL) |
| 2249 | abort (); |
| 2250 | |
| 2251 | if (hplink->root.dynamic_sections_created) |
| 2252 | { |
| 2253 | /* Set the contents of the .interp section to the interpreter. */ |
| 2254 | if (! info->shared) |
| 2255 | { |
| 2256 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 2257 | if (s == NULL) |
| 2258 | abort (); |
| 2259 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 2260 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 2261 | } |
| 2262 | |
| 2263 | /* Force millicode symbols local. */ |
| 2264 | elf_link_hash_traverse (&hplink->root, |
| 2265 | clobber_millicode_symbols, |
| 2266 | info); |
| 2267 | } |
| 2268 | else |
| 2269 | { |
| 2270 | /* Run through the function symbols, looking for any that are |
| 2271 | PIC, and allocate space for the necessary .plt entries so |
| 2272 | that %r19 will be set up. */ |
| 2273 | if (! info->shared) |
| 2274 | elf_link_hash_traverse (&hplink->root, |
| 2275 | hppa_handle_PIC_calls, |
| 2276 | info); |
| 2277 | } |
| 2278 | |
| 2279 | /* Set up .got and .plt offsets for local syms. */ |
| 2280 | for (i = info->input_bfds; i; i = i->link_next) |
| 2281 | { |
| 2282 | bfd_signed_vma *local_got; |
| 2283 | bfd_signed_vma *end_local_got; |
| 2284 | bfd_signed_vma *local_plt; |
| 2285 | bfd_signed_vma *end_local_plt; |
| 2286 | bfd_size_type locsymcount; |
| 2287 | Elf_Internal_Shdr *symtab_hdr; |
| 2288 | asection *srel; |
| 2289 | |
| 2290 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) |
| 2291 | continue; |
| 2292 | |
| 2293 | local_got = elf_local_got_refcounts (i); |
| 2294 | if (!local_got) |
| 2295 | continue; |
| 2296 | |
| 2297 | symtab_hdr = &elf_tdata (i)->symtab_hdr; |
| 2298 | locsymcount = symtab_hdr->sh_info; |
| 2299 | end_local_got = local_got + locsymcount; |
| 2300 | s = hplink->sgot; |
| 2301 | srel = hplink->srelgot; |
| 2302 | for (; local_got < end_local_got; ++local_got) |
| 2303 | { |
| 2304 | if (*local_got > 0) |
| 2305 | { |
| 2306 | *local_got = s->_raw_size; |
| 2307 | s->_raw_size += GOT_ENTRY_SIZE; |
| 2308 | if (info->shared) |
| 2309 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 2310 | } |
| 2311 | else |
| 2312 | *local_got = (bfd_vma) -1; |
| 2313 | } |
| 2314 | |
| 2315 | local_plt = end_local_got; |
| 2316 | end_local_plt = local_plt + locsymcount; |
| 2317 | if (! hplink->root.dynamic_sections_created) |
| 2318 | { |
| 2319 | /* Won't be used, but be safe. */ |
| 2320 | for (; local_plt < end_local_plt; ++local_plt) |
| 2321 | *local_plt = (bfd_vma) -1; |
| 2322 | } |
| 2323 | else |
| 2324 | { |
| 2325 | s = hplink->splt; |
| 2326 | srel = hplink->srelplt; |
| 2327 | for (; local_plt < end_local_plt; ++local_plt) |
| 2328 | { |
| 2329 | if (*local_plt > 0) |
| 2330 | { |
| 2331 | *local_plt = s->_raw_size; |
| 2332 | s->_raw_size += PLT_ENTRY_SIZE; |
| 2333 | if (info->shared) |
| 2334 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 2335 | } |
| 2336 | else |
| 2337 | *local_plt = (bfd_vma) -1; |
| 2338 | } |
| 2339 | } |
| 2340 | } |
| 2341 | |
| 2342 | /* Allocate global sym .plt and .got entries. Also discard all |
| 2343 | unneeded relocs. */ |
| 2344 | elf_link_hash_traverse (&hplink->root, |
| 2345 | allocate_plt_and_got_and_discard_relocs, |
| 2346 | (PTR) info); |
| 2347 | |
| 2348 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 2349 | determined the sizes of the various dynamic sections. Allocate |
| 2350 | memory for them. */ |
| 2351 | relocs = false; |
| 2352 | reltext = false; |
| 2353 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 2354 | { |
| 2355 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 2356 | continue; |
| 2357 | |
| 2358 | if (s == hplink->splt) |
| 2359 | { |
| 2360 | if (hplink->need_plt_stub) |
| 2361 | { |
| 2362 | /* Make space for the plt stub at the end of the .plt |
| 2363 | section. We want this stub right at the end, up |
| 2364 | against the .got section. */ |
| 2365 | int gotalign = bfd_section_alignment (dynobj, hplink->sgot); |
| 2366 | int pltalign = bfd_section_alignment (dynobj, s); |
| 2367 | bfd_size_type mask; |
| 2368 | |
| 2369 | if (gotalign > pltalign) |
| 2370 | bfd_set_section_alignment (dynobj, s, gotalign); |
| 2371 | mask = ((bfd_size_type) 1 << gotalign) - 1; |
| 2372 | s->_raw_size = (s->_raw_size + sizeof (plt_stub) + mask) & ~mask; |
| 2373 | } |
| 2374 | } |
| 2375 | else if (s == hplink->sgot) |
| 2376 | ; |
| 2377 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
| 2378 | { |
| 2379 | if (s->_raw_size != 0) |
| 2380 | { |
| 2381 | asection *target; |
| 2382 | const char *outname; |
| 2383 | |
| 2384 | /* Remember whether there are any reloc sections other |
| 2385 | than .rela.plt. */ |
| 2386 | if (s != hplink->srelplt) |
| 2387 | relocs = true; |
| 2388 | |
| 2389 | /* If this relocation section applies to a read only |
| 2390 | section, then we probably need a DT_TEXTREL entry. */ |
| 2391 | outname = bfd_get_section_name (output_bfd, |
| 2392 | s->output_section); |
| 2393 | target = bfd_get_section_by_name (output_bfd, outname + 5); |
| 2394 | if (target != NULL |
| 2395 | && (target->flags & SEC_READONLY) != 0 |
| 2396 | && (target->flags & SEC_ALLOC) != 0) |
| 2397 | reltext = true; |
| 2398 | |
| 2399 | /* We use the reloc_count field as a counter if we need |
| 2400 | to copy relocs into the output file. */ |
| 2401 | s->reloc_count = 0; |
| 2402 | } |
| 2403 | } |
| 2404 | else |
| 2405 | { |
| 2406 | /* It's not one of our sections, so don't allocate space. */ |
| 2407 | continue; |
| 2408 | } |
| 2409 | |
| 2410 | if (s->_raw_size == 0) |
| 2411 | { |
| 2412 | /* If we don't need this section, strip it from the |
| 2413 | output file. This is mostly to handle .rela.bss and |
| 2414 | .rela.plt. We must create both sections in |
| 2415 | create_dynamic_sections, because they must be created |
| 2416 | before the linker maps input sections to output |
| 2417 | sections. The linker does that before |
| 2418 | adjust_dynamic_symbol is called, and it is that |
| 2419 | function which decides whether anything needs to go |
| 2420 | into these sections. */ |
| 2421 | _bfd_strip_section_from_output (info, s); |
| 2422 | continue; |
| 2423 | } |
| 2424 | |
| 2425 | /* Allocate memory for the section contents. Zero it, because |
| 2426 | we may not fill in all the reloc sections. */ |
| 2427 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| 2428 | if (s->contents == NULL && s->_raw_size != 0) |
| 2429 | return false; |
| 2430 | } |
| 2431 | |
| 2432 | if (hplink->root.dynamic_sections_created) |
| 2433 | { |
| 2434 | /* Like IA-64 and HPPA64, always create a DT_PLTGOT. It |
| 2435 | actually has nothing to do with the PLT, it is how we |
| 2436 | communicate the LTP value of a load module to the dynamic |
| 2437 | linker. */ |
| 2438 | #define add_dynamic_entry(TAG, VAL) \ |
| 2439 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) |
| 2440 | |
| 2441 | if (!add_dynamic_entry (DT_PLTGOT, 0)) |
| 2442 | return false; |
| 2443 | |
| 2444 | /* Add some entries to the .dynamic section. We fill in the |
| 2445 | values later, in elf32_hppa_finish_dynamic_sections, but we |
| 2446 | must add the entries now so that we get the correct size for |
| 2447 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 2448 | dynamic linker and used by the debugger. */ |
| 2449 | if (!info->shared) |
| 2450 | { |
| 2451 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 2452 | return false; |
| 2453 | } |
| 2454 | |
| 2455 | if (hplink->srelplt->_raw_size != 0) |
| 2456 | { |
| 2457 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) |
| 2458 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 2459 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 2460 | return false; |
| 2461 | } |
| 2462 | |
| 2463 | if (relocs) |
| 2464 | { |
| 2465 | if (!add_dynamic_entry (DT_RELA, 0) |
| 2466 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 2467 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 2468 | return false; |
| 2469 | } |
| 2470 | |
| 2471 | if (reltext) |
| 2472 | { |
| 2473 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 2474 | return false; |
| 2475 | info->flags |= DF_TEXTREL; |
| 2476 | } |
| 2477 | } |
| 2478 | #undef add_dynamic_entry |
| 2479 | |
| 2480 | return true; |
| 2481 | } |
| 2482 | |
| 2483 | /* External entry points for sizing and building linker stubs. */ |
| 2484 | |
| 2485 | /* Determine and set the size of the stub section for a final link. |
| 2486 | |
| 2487 | The basic idea here is to examine all the relocations looking for |
| 2488 | PC-relative calls to a target that is unreachable with a "bl" |
| 2489 | instruction. */ |
| 2490 | |
| 2491 | boolean |
| 2492 | elf32_hppa_size_stubs (output_bfd, stub_bfd, info, multi_subspace, group_size, |
| 2493 | add_stub_section, layout_sections_again) |
| 2494 | bfd *output_bfd; |
| 2495 | bfd *stub_bfd; |
| 2496 | struct bfd_link_info *info; |
| 2497 | boolean multi_subspace; |
| 2498 | bfd_signed_vma group_size; |
| 2499 | asection * (*add_stub_section) PARAMS ((const char *, asection *)); |
| 2500 | void (*layout_sections_again) PARAMS ((void)); |
| 2501 | { |
| 2502 | bfd *input_bfd; |
| 2503 | asection *section; |
| 2504 | asection **input_list, **list; |
| 2505 | Elf_Internal_Sym *local_syms, **all_local_syms; |
| 2506 | unsigned int bfd_indx, bfd_count; |
| 2507 | int top_id, top_index; |
| 2508 | struct elf32_hppa_link_hash_table *hplink; |
| 2509 | bfd_size_type stub_group_size; |
| 2510 | boolean stubs_always_before_branch; |
| 2511 | boolean stub_changed = 0; |
| 2512 | boolean ret = 0; |
| 2513 | bfd_size_type amt; |
| 2514 | |
| 2515 | hplink = hppa_link_hash_table (info); |
| 2516 | |
| 2517 | /* Stash our params away. */ |
| 2518 | hplink->stub_bfd = stub_bfd; |
| 2519 | hplink->multi_subspace = multi_subspace; |
| 2520 | hplink->add_stub_section = add_stub_section; |
| 2521 | hplink->layout_sections_again = layout_sections_again; |
| 2522 | stubs_always_before_branch = group_size < 0; |
| 2523 | if (group_size < 0) |
| 2524 | stub_group_size = -group_size; |
| 2525 | else |
| 2526 | stub_group_size = group_size; |
| 2527 | if (stub_group_size == 1) |
| 2528 | { |
| 2529 | /* Default values. */ |
| 2530 | stub_group_size = 8000000; |
| 2531 | if (hplink->has_17bit_branch || hplink->multi_subspace) |
| 2532 | stub_group_size = 250000; |
| 2533 | if (hplink->has_12bit_branch) |
| 2534 | stub_group_size = 7812; |
| 2535 | } |
| 2536 | |
| 2537 | /* Count the number of input BFDs and find the top input section id. */ |
| 2538 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| 2539 | input_bfd != NULL; |
| 2540 | input_bfd = input_bfd->link_next) |
| 2541 | { |
| 2542 | bfd_count += 1; |
| 2543 | for (section = input_bfd->sections; |
| 2544 | section != NULL; |
| 2545 | section = section->next) |
| 2546 | { |
| 2547 | if (top_id < section->id) |
| 2548 | top_id = section->id; |
| 2549 | } |
| 2550 | } |
| 2551 | |
| 2552 | amt = sizeof (struct map_stub) * (top_id + 1); |
| 2553 | hplink->stub_group = (struct map_stub *) bfd_zmalloc (amt); |
| 2554 | if (hplink->stub_group == NULL) |
| 2555 | return false; |
| 2556 | |
| 2557 | /* Make a list of input sections for each output section included in |
| 2558 | the link. |
| 2559 | |
| 2560 | We can't use output_bfd->section_count here to find the top output |
| 2561 | section index as some sections may have been removed, and |
| 2562 | _bfd_strip_section_from_output doesn't renumber the indices. */ |
| 2563 | for (section = output_bfd->sections, top_index = 0; |
| 2564 | section != NULL; |
| 2565 | section = section->next) |
| 2566 | { |
| 2567 | if (top_index < section->index) |
| 2568 | top_index = section->index; |
| 2569 | } |
| 2570 | |
| 2571 | amt = sizeof (asection *) * (top_index + 1); |
| 2572 | input_list = (asection **) bfd_malloc (amt); |
| 2573 | if (input_list == NULL) |
| 2574 | return false; |
| 2575 | |
| 2576 | /* For sections we aren't interested in, mark their entries with a |
| 2577 | value we can check later. */ |
| 2578 | list = input_list + top_index; |
| 2579 | do |
| 2580 | *list = bfd_abs_section_ptr; |
| 2581 | while (list-- != input_list); |
| 2582 | |
| 2583 | for (section = output_bfd->sections; |
| 2584 | section != NULL; |
| 2585 | section = section->next) |
| 2586 | { |
| 2587 | if ((section->flags & SEC_CODE) != 0) |
| 2588 | input_list[section->index] = NULL; |
| 2589 | } |
| 2590 | |
| 2591 | /* Now actually build the lists. */ |
| 2592 | for (input_bfd = info->input_bfds; |
| 2593 | input_bfd != NULL; |
| 2594 | input_bfd = input_bfd->link_next) |
| 2595 | { |
| 2596 | for (section = input_bfd->sections; |
| 2597 | section != NULL; |
| 2598 | section = section->next) |
| 2599 | { |
| 2600 | if (section->output_section != NULL |
| 2601 | && section->output_section->owner == output_bfd |
| 2602 | && section->output_section->index <= top_index) |
| 2603 | { |
| 2604 | list = input_list + section->output_section->index; |
| 2605 | if (*list != bfd_abs_section_ptr) |
| 2606 | { |
| 2607 | /* Steal the link_sec pointer for our list. */ |
| 2608 | #define PREV_SEC(sec) (hplink->stub_group[(sec)->id].link_sec) |
| 2609 | /* This happens to make the list in reverse order, |
| 2610 | which is what we want. */ |
| 2611 | PREV_SEC (section) = *list; |
| 2612 | *list = section; |
| 2613 | } |
| 2614 | } |
| 2615 | } |
| 2616 | } |
| 2617 | |
| 2618 | /* See whether we can group stub sections together. Grouping stub |
| 2619 | sections may result in fewer stubs. More importantly, we need to |
| 2620 | put all .init* and .fini* stubs at the beginning of the .init or |
| 2621 | .fini output sections respectively, because glibc splits the |
| 2622 | _init and _fini functions into multiple parts. Putting a stub in |
| 2623 | the middle of a function is not a good idea. */ |
| 2624 | list = input_list + top_index; |
| 2625 | do |
| 2626 | { |
| 2627 | asection *tail = *list; |
| 2628 | if (tail == bfd_abs_section_ptr) |
| 2629 | continue; |
| 2630 | while (tail != NULL) |
| 2631 | { |
| 2632 | asection *curr; |
| 2633 | asection *prev; |
| 2634 | bfd_size_type total; |
| 2635 | |
| 2636 | curr = tail; |
| 2637 | if (tail->_cooked_size) |
| 2638 | total = tail->_cooked_size; |
| 2639 | else |
| 2640 | total = tail->_raw_size; |
| 2641 | while ((prev = PREV_SEC (curr)) != NULL |
| 2642 | && ((total += curr->output_offset - prev->output_offset) |
| 2643 | < stub_group_size)) |
| 2644 | curr = prev; |
| 2645 | |
| 2646 | /* OK, the size from the start of CURR to the end is less |
| 2647 | than 250000 bytes and thus can be handled by one stub |
| 2648 | section. (or the tail section is itself larger than |
| 2649 | 250000 bytes, in which case we may be toast.) |
| 2650 | We should really be keeping track of the total size of |
| 2651 | stubs added here, as stubs contribute to the final output |
| 2652 | section size. That's a little tricky, and this way will |
| 2653 | only break if stubs added total more than 12144 bytes, or |
| 2654 | 1518 long branch stubs. It seems unlikely for more than |
| 2655 | 1518 different functions to be called, especially from |
| 2656 | code only 250000 bytes long. */ |
| 2657 | do |
| 2658 | { |
| 2659 | prev = PREV_SEC (tail); |
| 2660 | /* Set up this stub group. */ |
| 2661 | hplink->stub_group[tail->id].link_sec = curr; |
| 2662 | } |
| 2663 | while (tail != curr && (tail = prev) != NULL); |
| 2664 | |
| 2665 | /* But wait, there's more! Input sections up to 250000 |
| 2666 | bytes before the stub section can be handled by it too. */ |
| 2667 | if (!stubs_always_before_branch) |
| 2668 | { |
| 2669 | total = 0; |
| 2670 | while (prev != NULL |
| 2671 | && ((total += tail->output_offset - prev->output_offset) |
| 2672 | < stub_group_size)) |
| 2673 | { |
| 2674 | tail = prev; |
| 2675 | prev = PREV_SEC (tail); |
| 2676 | hplink->stub_group[tail->id].link_sec = curr; |
| 2677 | } |
| 2678 | } |
| 2679 | tail = prev; |
| 2680 | } |
| 2681 | } |
| 2682 | while (list-- != input_list); |
| 2683 | free (input_list); |
| 2684 | #undef PREV_SEC |
| 2685 | |
| 2686 | /* We want to read in symbol extension records only once. To do this |
| 2687 | we need to read in the local symbols in parallel and save them for |
| 2688 | later use; so hold pointers to the local symbols in an array. */ |
| 2689 | amt = sizeof (Elf_Internal_Sym *) * bfd_count; |
| 2690 | all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt); |
| 2691 | if (all_local_syms == NULL) |
| 2692 | return false; |
| 2693 | |
| 2694 | /* Walk over all the input BFDs, swapping in local symbols. |
| 2695 | If we are creating a shared library, create hash entries for the |
| 2696 | export stubs. */ |
| 2697 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
| 2698 | input_bfd != NULL; |
| 2699 | input_bfd = input_bfd->link_next, bfd_indx++) |
| 2700 | { |
| 2701 | Elf_Internal_Shdr *symtab_hdr; |
| 2702 | Elf_Internal_Sym *isym; |
| 2703 | Elf32_External_Sym *ext_syms, *esym, *end_sy; |
| 2704 | bfd_size_type sec_size; |
| 2705 | |
| 2706 | /* We'll need the symbol table in a second. */ |
| 2707 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2708 | if (symtab_hdr->sh_info == 0) |
| 2709 | continue; |
| 2710 | |
| 2711 | /* We need an array of the local symbols attached to the input bfd. |
| 2712 | Unfortunately, we're going to have to read & swap them in. */ |
| 2713 | sec_size = symtab_hdr->sh_info; |
| 2714 | sec_size *= sizeof (Elf_Internal_Sym); |
| 2715 | local_syms = (Elf_Internal_Sym *) bfd_malloc (sec_size); |
| 2716 | if (local_syms == NULL) |
| 2717 | { |
| 2718 | goto error_ret_free_local; |
| 2719 | } |
| 2720 | all_local_syms[bfd_indx] = local_syms; |
| 2721 | sec_size = symtab_hdr->sh_info; |
| 2722 | sec_size *= sizeof (Elf32_External_Sym); |
| 2723 | ext_syms = (Elf32_External_Sym *) bfd_malloc (sec_size); |
| 2724 | if (ext_syms == NULL) |
| 2725 | { |
| 2726 | goto error_ret_free_local; |
| 2727 | } |
| 2728 | |
| 2729 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 |
| 2730 | || (bfd_bread (ext_syms, sec_size, input_bfd) != sec_size)) |
| 2731 | { |
| 2732 | free (ext_syms); |
| 2733 | goto error_ret_free_local; |
| 2734 | } |
| 2735 | |
| 2736 | /* Swap the local symbols in. */ |
| 2737 | isym = local_syms; |
| 2738 | esym = ext_syms; |
| 2739 | for (end_sy = esym + symtab_hdr->sh_info; esym < end_sy; esym++, isym++) |
| 2740 | bfd_elf32_swap_symbol_in (input_bfd, esym, isym); |
| 2741 | |
| 2742 | /* Now we can free the external symbols. */ |
| 2743 | free (ext_syms); |
| 2744 | |
| 2745 | #if ! LONG_BRANCH_PIC_IN_SHLIB |
| 2746 | /* If this is a shared link, find all the stub reloc sections. */ |
| 2747 | if (info->shared) |
| 2748 | for (section = input_bfd->sections; |
| 2749 | section != NULL; |
| 2750 | section = section->next) |
| 2751 | { |
| 2752 | char *name; |
| 2753 | asection *reloc_sec; |
| 2754 | |
| 2755 | name = bfd_malloc ((bfd_size_type) strlen (section->name) |
| 2756 | + sizeof STUB_SUFFIX |
| 2757 | + 5); |
| 2758 | if (name == NULL) |
| 2759 | return false; |
| 2760 | sprintf (name, ".rela%s%s", section->name, STUB_SUFFIX); |
| 2761 | reloc_sec = bfd_get_section_by_name (hplink->root.dynobj, name); |
| 2762 | hplink->stub_group[section->id].reloc_sec = reloc_sec; |
| 2763 | free (name); |
| 2764 | } |
| 2765 | #endif |
| 2766 | |
| 2767 | if (info->shared && hplink->multi_subspace) |
| 2768 | { |
| 2769 | struct elf_link_hash_entry **sym_hashes; |
| 2770 | struct elf_link_hash_entry **end_hashes; |
| 2771 | unsigned int symcount; |
| 2772 | |
| 2773 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 2774 | - symtab_hdr->sh_info); |
| 2775 | sym_hashes = elf_sym_hashes (input_bfd); |
| 2776 | end_hashes = sym_hashes + symcount; |
| 2777 | |
| 2778 | /* Look through the global syms for functions; We need to |
| 2779 | build export stubs for all globally visible functions. */ |
| 2780 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 2781 | { |
| 2782 | struct elf32_hppa_link_hash_entry *hash; |
| 2783 | |
| 2784 | hash = (struct elf32_hppa_link_hash_entry *) *sym_hashes; |
| 2785 | |
| 2786 | while (hash->elf.root.type == bfd_link_hash_indirect |
| 2787 | || hash->elf.root.type == bfd_link_hash_warning) |
| 2788 | hash = ((struct elf32_hppa_link_hash_entry *) |
| 2789 | hash->elf.root.u.i.link); |
| 2790 | |
| 2791 | /* At this point in the link, undefined syms have been |
| 2792 | resolved, so we need to check that the symbol was |
| 2793 | defined in this BFD. */ |
| 2794 | if ((hash->elf.root.type == bfd_link_hash_defined |
| 2795 | || hash->elf.root.type == bfd_link_hash_defweak) |
| 2796 | && hash->elf.type == STT_FUNC |
| 2797 | && hash->elf.root.u.def.section->output_section != NULL |
| 2798 | && (hash->elf.root.u.def.section->output_section->owner |
| 2799 | == output_bfd) |
| 2800 | && hash->elf.root.u.def.section->owner == input_bfd |
| 2801 | && (hash->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) |
| 2802 | && !(hash->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) |
| 2803 | && ELF_ST_VISIBILITY (hash->elf.other) == STV_DEFAULT) |
| 2804 | { |
| 2805 | asection *sec; |
| 2806 | const char *stub_name; |
| 2807 | struct elf32_hppa_stub_hash_entry *stub_entry; |
| 2808 | |
| 2809 | sec = hash->elf.root.u.def.section; |
| 2810 | stub_name = hash->elf.root.root.string; |
| 2811 | stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table, |
| 2812 | stub_name, |
| 2813 | false, false); |
| 2814 | if (stub_entry == NULL) |
| 2815 | { |
| 2816 | stub_entry = hppa_add_stub (stub_name, sec, hplink); |
| 2817 | if (!stub_entry) |
| 2818 | goto error_ret_free_local; |
| 2819 | |
| 2820 | stub_entry->target_value = hash->elf.root.u.def.value; |
| 2821 | stub_entry->target_section = hash->elf.root.u.def.section; |
| 2822 | stub_entry->stub_type = hppa_stub_export; |
| 2823 | stub_entry->h = hash; |
| 2824 | stub_changed = 1; |
| 2825 | } |
| 2826 | else |
| 2827 | { |
| 2828 | (*_bfd_error_handler) (_("%s: duplicate export stub %s"), |
| 2829 | bfd_get_filename (input_bfd), |
| 2830 | stub_name); |
| 2831 | } |
| 2832 | } |
| 2833 | } |
| 2834 | } |
| 2835 | } |
| 2836 | |
| 2837 | while (1) |
| 2838 | { |
| 2839 | asection *stub_sec; |
| 2840 | |
| 2841 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
| 2842 | input_bfd != NULL; |
| 2843 | input_bfd = input_bfd->link_next, bfd_indx++) |
| 2844 | { |
| 2845 | Elf_Internal_Shdr *symtab_hdr; |
| 2846 | |
| 2847 | /* We'll need the symbol table in a second. */ |
| 2848 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2849 | if (symtab_hdr->sh_info == 0) |
| 2850 | continue; |
| 2851 | |
| 2852 | local_syms = all_local_syms[bfd_indx]; |
| 2853 | |
| 2854 | /* Walk over each section attached to the input bfd. */ |
| 2855 | for (section = input_bfd->sections; |
| 2856 | section != NULL; |
| 2857 | section = section->next) |
| 2858 | { |
| 2859 | Elf_Internal_Shdr *input_rel_hdr; |
| 2860 | Elf32_External_Rela *external_relocs, *erelaend, *erela; |
| 2861 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 2862 | |
| 2863 | /* If there aren't any relocs, then there's nothing more |
| 2864 | to do. */ |
| 2865 | if ((section->flags & SEC_RELOC) == 0 |
| 2866 | || section->reloc_count == 0) |
| 2867 | continue; |
| 2868 | |
| 2869 | /* If this section is a link-once section that will be |
| 2870 | discarded, then don't create any stubs. */ |
| 2871 | if (section->output_section == NULL |
| 2872 | || section->output_section->owner != output_bfd) |
| 2873 | continue; |
| 2874 | |
| 2875 | /* Allocate space for the external relocations. */ |
| 2876 | amt = section->reloc_count; |
| 2877 | amt *= sizeof (Elf32_External_Rela); |
| 2878 | external_relocs = (Elf32_External_Rela *) bfd_malloc (amt); |
| 2879 | if (external_relocs == NULL) |
| 2880 | { |
| 2881 | goto error_ret_free_local; |
| 2882 | } |
| 2883 | |
| 2884 | /* Likewise for the internal relocations. */ |
| 2885 | amt = section->reloc_count; |
| 2886 | amt *= sizeof (Elf_Internal_Rela); |
| 2887 | internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); |
| 2888 | if (internal_relocs == NULL) |
| 2889 | { |
| 2890 | free (external_relocs); |
| 2891 | goto error_ret_free_local; |
| 2892 | } |
| 2893 | |
| 2894 | /* Read in the external relocs. */ |
| 2895 | input_rel_hdr = &elf_section_data (section)->rel_hdr; |
| 2896 | if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0 |
| 2897 | || bfd_bread (external_relocs, |
| 2898 | input_rel_hdr->sh_size, |
| 2899 | input_bfd) != input_rel_hdr->sh_size) |
| 2900 | { |
| 2901 | free (external_relocs); |
| 2902 | error_ret_free_internal: |
| 2903 | free (internal_relocs); |
| 2904 | goto error_ret_free_local; |
| 2905 | } |
| 2906 | |
| 2907 | /* Swap in the relocs. */ |
| 2908 | erela = external_relocs; |
| 2909 | erelaend = erela + section->reloc_count; |
| 2910 | irela = internal_relocs; |
| 2911 | for (; erela < erelaend; erela++, irela++) |
| 2912 | bfd_elf32_swap_reloca_in (input_bfd, erela, irela); |
| 2913 | |
| 2914 | /* We're done with the external relocs, free them. */ |
| 2915 | free (external_relocs); |
| 2916 | |
| 2917 | /* Now examine each relocation. */ |
| 2918 | irela = internal_relocs; |
| 2919 | irelaend = irela + section->reloc_count; |
| 2920 | for (; irela < irelaend; irela++) |
| 2921 | { |
| 2922 | unsigned int r_type, r_indx; |
| 2923 | enum elf32_hppa_stub_type stub_type; |
| 2924 | struct elf32_hppa_stub_hash_entry *stub_entry; |
| 2925 | asection *sym_sec; |
| 2926 | bfd_vma sym_value; |
| 2927 | bfd_vma destination; |
| 2928 | struct elf32_hppa_link_hash_entry *hash; |
| 2929 | char *stub_name; |
| 2930 | const asection *id_sec; |
| 2931 | |
| 2932 | r_type = ELF32_R_TYPE (irela->r_info); |
| 2933 | r_indx = ELF32_R_SYM (irela->r_info); |
| 2934 | |
| 2935 | if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED) |
| 2936 | { |
| 2937 | bfd_set_error (bfd_error_bad_value); |
| 2938 | goto error_ret_free_internal; |
| 2939 | } |
| 2940 | |
| 2941 | /* Only look for stubs on call instructions. */ |
| 2942 | if (r_type != (unsigned int) R_PARISC_PCREL12F |
| 2943 | && r_type != (unsigned int) R_PARISC_PCREL17F |
| 2944 | && r_type != (unsigned int) R_PARISC_PCREL22F) |
| 2945 | continue; |
| 2946 | |
| 2947 | /* Now determine the call target, its name, value, |
| 2948 | section. */ |
| 2949 | sym_sec = NULL; |
| 2950 | sym_value = 0; |
| 2951 | destination = 0; |
| 2952 | hash = NULL; |
| 2953 | if (r_indx < symtab_hdr->sh_info) |
| 2954 | { |
| 2955 | /* It's a local symbol. */ |
| 2956 | Elf_Internal_Sym *sym; |
| 2957 | Elf_Internal_Shdr *hdr; |
| 2958 | |
| 2959 | sym = local_syms + r_indx; |
| 2960 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; |
| 2961 | sym_sec = hdr->bfd_section; |
| 2962 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 2963 | sym_value = sym->st_value; |
| 2964 | destination = (sym_value + irela->r_addend |
| 2965 | + sym_sec->output_offset |
| 2966 | + sym_sec->output_section->vma); |
| 2967 | } |
| 2968 | else |
| 2969 | { |
| 2970 | /* It's an external symbol. */ |
| 2971 | int e_indx; |
| 2972 | |
| 2973 | e_indx = r_indx - symtab_hdr->sh_info; |
| 2974 | hash = ((struct elf32_hppa_link_hash_entry *) |
| 2975 | elf_sym_hashes (input_bfd)[e_indx]); |
| 2976 | |
| 2977 | while (hash->elf.root.type == bfd_link_hash_indirect |
| 2978 | || hash->elf.root.type == bfd_link_hash_warning) |
| 2979 | hash = ((struct elf32_hppa_link_hash_entry *) |
| 2980 | hash->elf.root.u.i.link); |
| 2981 | |
| 2982 | if (hash->elf.root.type == bfd_link_hash_defined |
| 2983 | || hash->elf.root.type == bfd_link_hash_defweak) |
| 2984 | { |
| 2985 | sym_sec = hash->elf.root.u.def.section; |
| 2986 | sym_value = hash->elf.root.u.def.value; |
| 2987 | if (sym_sec->output_section != NULL) |
| 2988 | destination = (sym_value + irela->r_addend |
| 2989 | + sym_sec->output_offset |
| 2990 | + sym_sec->output_section->vma); |
| 2991 | } |
| 2992 | else if (hash->elf.root.type == bfd_link_hash_undefweak) |
| 2993 | { |
| 2994 | if (! info->shared) |
| 2995 | continue; |
| 2996 | } |
| 2997 | else if (hash->elf.root.type == bfd_link_hash_undefined) |
| 2998 | { |
| 2999 | if (! (info->shared |
| 3000 | && !info->no_undefined |
| 3001 | && (ELF_ST_VISIBILITY (hash->elf.other) |
| 3002 | == STV_DEFAULT))) |
| 3003 | continue; |
| 3004 | } |
| 3005 | else |
| 3006 | { |
| 3007 | bfd_set_error (bfd_error_bad_value); |
| 3008 | goto error_ret_free_internal; |
| 3009 | } |
| 3010 | } |
| 3011 | |
| 3012 | /* Determine what (if any) linker stub is needed. */ |
| 3013 | stub_type = hppa_type_of_stub (section, irela, hash, |
| 3014 | destination); |
| 3015 | if (stub_type == hppa_stub_none) |
| 3016 | continue; |
| 3017 | |
| 3018 | /* Support for grouping stub sections. */ |
| 3019 | id_sec = hplink->stub_group[section->id].link_sec; |
| 3020 | |
| 3021 | /* Get the name of this stub. */ |
| 3022 | stub_name = hppa_stub_name (id_sec, sym_sec, hash, irela); |
| 3023 | if (!stub_name) |
| 3024 | goto error_ret_free_internal; |
| 3025 | |
| 3026 | stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table, |
| 3027 | stub_name, |
| 3028 | false, false); |
| 3029 | if (stub_entry != NULL) |
| 3030 | { |
| 3031 | /* The proper stub has already been created. */ |
| 3032 | free (stub_name); |
| 3033 | continue; |
| 3034 | } |
| 3035 | |
| 3036 | stub_entry = hppa_add_stub (stub_name, section, hplink); |
| 3037 | if (stub_entry == NULL) |
| 3038 | { |
| 3039 | free (stub_name); |
| 3040 | goto error_ret_free_local; |
| 3041 | } |
| 3042 | |
| 3043 | stub_entry->target_value = sym_value; |
| 3044 | stub_entry->target_section = sym_sec; |
| 3045 | stub_entry->stub_type = stub_type; |
| 3046 | if (info->shared) |
| 3047 | { |
| 3048 | if (stub_type == hppa_stub_import) |
| 3049 | stub_entry->stub_type = hppa_stub_import_shared; |
| 3050 | else if (stub_type == hppa_stub_long_branch |
| 3051 | && (LONG_BRANCH_PIC_IN_SHLIB || hash == NULL)) |
| 3052 | stub_entry->stub_type = hppa_stub_long_branch_shared; |
| 3053 | } |
| 3054 | stub_entry->h = hash; |
| 3055 | stub_changed = 1; |
| 3056 | } |
| 3057 | |
| 3058 | /* We're done with the internal relocs, free them. */ |
| 3059 | free (internal_relocs); |
| 3060 | } |
| 3061 | } |
| 3062 | |
| 3063 | if (!stub_changed) |
| 3064 | break; |
| 3065 | |
| 3066 | /* OK, we've added some stubs. Find out the new size of the |
| 3067 | stub sections. */ |
| 3068 | for (stub_sec = hplink->stub_bfd->sections; |
| 3069 | stub_sec != NULL; |
| 3070 | stub_sec = stub_sec->next) |
| 3071 | { |
| 3072 | stub_sec->_raw_size = 0; |
| 3073 | stub_sec->_cooked_size = 0; |
| 3074 | } |
| 3075 | #if ! LONG_BRANCH_PIC_IN_SHLIB |
| 3076 | { |
| 3077 | int i; |
| 3078 | |
| 3079 | for (i = top_id; i >= 0; --i) |
| 3080 | { |
| 3081 | /* This will probably hit the same section many times.. */ |
| 3082 | stub_sec = hplink->stub_group[i].reloc_sec; |
| 3083 | if (stub_sec != NULL) |
| 3084 | { |
| 3085 | stub_sec->_raw_size = 0; |
| 3086 | stub_sec->_cooked_size = 0; |
| 3087 | } |
| 3088 | } |
| 3089 | } |
| 3090 | #endif |
| 3091 | |
| 3092 | bfd_hash_traverse (&hplink->stub_hash_table, |
| 3093 | hppa_size_one_stub, |
| 3094 | hplink); |
| 3095 | |
| 3096 | /* Ask the linker to do its stuff. */ |
| 3097 | (*hplink->layout_sections_again) (); |
| 3098 | stub_changed = 0; |
| 3099 | } |
| 3100 | |
| 3101 | ret = 1; |
| 3102 | |
| 3103 | error_ret_free_local: |
| 3104 | while (bfd_count-- > 0) |
| 3105 | if (all_local_syms[bfd_count]) |
| 3106 | free (all_local_syms[bfd_count]); |
| 3107 | free (all_local_syms); |
| 3108 | |
| 3109 | return ret; |
| 3110 | } |
| 3111 | |
| 3112 | /* For a final link, this function is called after we have sized the |
| 3113 | stubs to provide a value for __gp. */ |
| 3114 | |
| 3115 | boolean |
| 3116 | elf32_hppa_set_gp (abfd, info) |
| 3117 | bfd *abfd; |
| 3118 | struct bfd_link_info *info; |
| 3119 | { |
| 3120 | struct elf32_hppa_link_hash_table *hplink; |
| 3121 | struct elf_link_hash_entry *h; |
| 3122 | asection *sec; |
| 3123 | bfd_vma gp_val; |
| 3124 | |
| 3125 | hplink = hppa_link_hash_table (info); |
| 3126 | h = elf_link_hash_lookup (&hplink->root, "$global$", |
| 3127 | false, false, false); |
| 3128 | |
| 3129 | if (h != NULL |
| 3130 | && (h->root.type == bfd_link_hash_defined |
| 3131 | || h->root.type == bfd_link_hash_defweak)) |
| 3132 | { |
| 3133 | gp_val = h->root.u.def.value; |
| 3134 | sec = h->root.u.def.section; |
| 3135 | } |
| 3136 | else |
| 3137 | { |
| 3138 | /* Choose to point our LTP at, in this order, one of .plt, .got, |
| 3139 | or .data, if these sections exist. In the case of choosing |
| 3140 | .plt try to make the LTP ideal for addressing anywhere in the |
| 3141 | .plt or .got with a 14 bit signed offset. Typically, the end |
| 3142 | of the .plt is the start of the .got, so choose .plt + 0x2000 |
| 3143 | if either the .plt or .got is larger than 0x2000. If both |
| 3144 | the .plt and .got are smaller than 0x2000, choose the end of |
| 3145 | the .plt section. */ |
| 3146 | |
| 3147 | sec = hplink->splt; |
| 3148 | if (sec != NULL) |
| 3149 | { |
| 3150 | gp_val = sec->_raw_size; |
| 3151 | if (gp_val > 0x2000 |
| 3152 | || (hplink->sgot && hplink->sgot->_raw_size > 0x2000)) |
| 3153 | { |
| 3154 | gp_val = 0x2000; |
| 3155 | } |
| 3156 | } |
| 3157 | else |
| 3158 | { |
| 3159 | gp_val = 0; |
| 3160 | sec = hplink->sgot; |
| 3161 | if (sec != NULL) |
| 3162 | { |
| 3163 | /* We know we don't have a .plt. If .got is large, |
| 3164 | offset our LTP. */ |
| 3165 | if (sec->_raw_size > 0x2000) |
| 3166 | gp_val = 0x2000; |
| 3167 | } |
| 3168 | else |
| 3169 | { |
| 3170 | /* No .plt or .got. Who cares what the LTP is? */ |
| 3171 | sec = bfd_get_section_by_name (abfd, ".data"); |
| 3172 | } |
| 3173 | } |
| 3174 | |
| 3175 | if (h != NULL) |
| 3176 | { |
| 3177 | h->root.type = bfd_link_hash_defined; |
| 3178 | h->root.u.def.value = gp_val; |
| 3179 | if (sec != NULL) |
| 3180 | h->root.u.def.section = sec; |
| 3181 | else |
| 3182 | h->root.u.def.section = bfd_abs_section_ptr; |
| 3183 | } |
| 3184 | } |
| 3185 | |
| 3186 | if (sec != NULL && sec->output_section != NULL) |
| 3187 | gp_val += sec->output_section->vma + sec->output_offset; |
| 3188 | |
| 3189 | elf_gp (abfd) = gp_val; |
| 3190 | return true; |
| 3191 | } |
| 3192 | |
| 3193 | /* Build all the stubs associated with the current output file. The |
| 3194 | stubs are kept in a hash table attached to the main linker hash |
| 3195 | table. We also set up the .plt entries for statically linked PIC |
| 3196 | functions here. This function is called via hppaelf_finish in the |
| 3197 | linker. */ |
| 3198 | |
| 3199 | boolean |
| 3200 | elf32_hppa_build_stubs (info) |
| 3201 | struct bfd_link_info *info; |
| 3202 | { |
| 3203 | asection *stub_sec; |
| 3204 | struct bfd_hash_table *table; |
| 3205 | struct elf32_hppa_link_hash_table *hplink; |
| 3206 | |
| 3207 | hplink = hppa_link_hash_table (info); |
| 3208 | |
| 3209 | for (stub_sec = hplink->stub_bfd->sections; |
| 3210 | stub_sec != NULL; |
| 3211 | stub_sec = stub_sec->next) |
| 3212 | { |
| 3213 | bfd_size_type size; |
| 3214 | |
| 3215 | /* Allocate memory to hold the linker stubs. */ |
| 3216 | size = stub_sec->_raw_size; |
| 3217 | stub_sec->contents = (unsigned char *) bfd_zalloc (hplink->stub_bfd, |
| 3218 | size); |
| 3219 | if (stub_sec->contents == NULL && size != 0) |
| 3220 | return false; |
| 3221 | stub_sec->_raw_size = 0; |
| 3222 | } |
| 3223 | |
| 3224 | /* Build the stubs as directed by the stub hash table. */ |
| 3225 | table = &hplink->stub_hash_table; |
| 3226 | bfd_hash_traverse (table, hppa_build_one_stub, info); |
| 3227 | |
| 3228 | return true; |
| 3229 | } |
| 3230 | |
| 3231 | /* Perform a final link. */ |
| 3232 | |
| 3233 | static boolean |
| 3234 | elf32_hppa_final_link (abfd, info) |
| 3235 | bfd *abfd; |
| 3236 | struct bfd_link_info *info; |
| 3237 | { |
| 3238 | asection *s; |
| 3239 | |
| 3240 | /* Invoke the regular ELF linker to do all the work. */ |
| 3241 | if (!bfd_elf32_bfd_final_link (abfd, info)) |
| 3242 | return false; |
| 3243 | |
| 3244 | /* If we're producing a final executable, sort the contents of the |
| 3245 | unwind section. Magic section names, but this is much safer than |
| 3246 | having elf32_hppa_relocate_section remember where SEGREL32 relocs |
| 3247 | occurred. Consider what happens if someone inept creates a |
| 3248 | linker script that puts unwind information in .text. */ |
| 3249 | s = bfd_get_section_by_name (abfd, ".PARISC.unwind"); |
| 3250 | if (s != NULL) |
| 3251 | { |
| 3252 | bfd_size_type size; |
| 3253 | char *contents; |
| 3254 | |
| 3255 | size = s->_raw_size; |
| 3256 | contents = bfd_malloc (size); |
| 3257 | if (contents == NULL) |
| 3258 | return false; |
| 3259 | |
| 3260 | if (! bfd_get_section_contents (abfd, s, contents, (file_ptr) 0, size)) |
| 3261 | return false; |
| 3262 | |
| 3263 | qsort (contents, (size_t) (size / 16), 16, hppa_unwind_entry_compare); |
| 3264 | |
| 3265 | if (! bfd_set_section_contents (abfd, s, contents, (file_ptr) 0, size)) |
| 3266 | return false; |
| 3267 | } |
| 3268 | return true; |
| 3269 | } |
| 3270 | |
| 3271 | /* Record the lowest address for the data and text segments. */ |
| 3272 | |
| 3273 | static void |
| 3274 | hppa_record_segment_addr (abfd, section, data) |
| 3275 | bfd *abfd ATTRIBUTE_UNUSED; |
| 3276 | asection *section; |
| 3277 | PTR data; |
| 3278 | { |
| 3279 | struct elf32_hppa_link_hash_table *hplink; |
| 3280 | |
| 3281 | hplink = (struct elf32_hppa_link_hash_table *) data; |
| 3282 | |
| 3283 | if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 3284 | { |
| 3285 | bfd_vma value = section->vma - section->filepos; |
| 3286 | |
| 3287 | if ((section->flags & SEC_READONLY) != 0) |
| 3288 | { |
| 3289 | if (value < hplink->text_segment_base) |
| 3290 | hplink->text_segment_base = value; |
| 3291 | } |
| 3292 | else |
| 3293 | { |
| 3294 | if (value < hplink->data_segment_base) |
| 3295 | hplink->data_segment_base = value; |
| 3296 | } |
| 3297 | } |
| 3298 | } |
| 3299 | |
| 3300 | /* Perform a relocation as part of a final link. */ |
| 3301 | |
| 3302 | static bfd_reloc_status_type |
| 3303 | final_link_relocate (input_section, contents, rel, value, hplink, sym_sec, h) |
| 3304 | asection *input_section; |
| 3305 | bfd_byte *contents; |
| 3306 | const Elf_Internal_Rela *rel; |
| 3307 | bfd_vma value; |
| 3308 | struct elf32_hppa_link_hash_table *hplink; |
| 3309 | asection *sym_sec; |
| 3310 | struct elf32_hppa_link_hash_entry *h; |
| 3311 | { |
| 3312 | int insn; |
| 3313 | unsigned int r_type = ELF32_R_TYPE (rel->r_info); |
| 3314 | reloc_howto_type *howto = elf_hppa_howto_table + r_type; |
| 3315 | int r_format = howto->bitsize; |
| 3316 | enum hppa_reloc_field_selector_type_alt r_field; |
| 3317 | bfd *input_bfd = input_section->owner; |
| 3318 | bfd_vma offset = rel->r_offset; |
| 3319 | bfd_vma max_branch_offset = 0; |
| 3320 | bfd_byte *hit_data = contents + offset; |
| 3321 | bfd_signed_vma addend = rel->r_addend; |
| 3322 | bfd_vma location; |
| 3323 | struct elf32_hppa_stub_hash_entry *stub_entry = NULL; |
| 3324 | int val; |
| 3325 | |
| 3326 | if (r_type == R_PARISC_NONE) |
| 3327 | return bfd_reloc_ok; |
| 3328 | |
| 3329 | insn = bfd_get_32 (input_bfd, hit_data); |
| 3330 | |
| 3331 | /* Find out where we are and where we're going. */ |
| 3332 | location = (offset + |
| 3333 | input_section->output_offset + |
| 3334 | input_section->output_section->vma); |
| 3335 | |
| 3336 | switch (r_type) |
| 3337 | { |
| 3338 | case R_PARISC_PCREL12F: |
| 3339 | case R_PARISC_PCREL17F: |
| 3340 | case R_PARISC_PCREL22F: |
| 3341 | /* If this is a call to a function defined in another dynamic |
| 3342 | library, or if it is a call to a PIC function in the same |
| 3343 | object, or if this is a shared link and it is a call to a |
| 3344 | weak symbol which may or may not be in the same object, then |
| 3345 | find the import stub in the stub hash. */ |
| 3346 | if (sym_sec == NULL |
| 3347 | || sym_sec->output_section == NULL |
| 3348 | || (h != NULL |
| 3349 | && ((h->maybe_pic_call |
| 3350 | && !(input_section->flags & SEC_HAS_GOT_REF)) |
| 3351 | || (h->elf.root.type == bfd_link_hash_defweak |
| 3352 | && h->elf.dynindx != -1 |
| 3353 | && h->elf.plt.offset != (bfd_vma) -1)))) |
| 3354 | { |
| 3355 | stub_entry = hppa_get_stub_entry (input_section, sym_sec, |
| 3356 | h, rel, hplink); |
| 3357 | if (stub_entry != NULL) |
| 3358 | { |
| 3359 | value = (stub_entry->stub_offset |
| 3360 | + stub_entry->stub_sec->output_offset |
| 3361 | + stub_entry->stub_sec->output_section->vma); |
| 3362 | addend = 0; |
| 3363 | } |
| 3364 | else if (sym_sec == NULL && h != NULL |
| 3365 | && h->elf.root.type == bfd_link_hash_undefweak) |
| 3366 | { |
| 3367 | /* It's OK if undefined weak. Calls to undefined weak |
| 3368 | symbols behave as if the "called" function |
| 3369 | immediately returns. We can thus call to a weak |
| 3370 | function without first checking whether the function |
| 3371 | is defined. */ |
| 3372 | value = location; |
| 3373 | addend = 8; |
| 3374 | } |
| 3375 | else |
| 3376 | return bfd_reloc_notsupported; |
| 3377 | } |
| 3378 | /* Fall thru. */ |
| 3379 | |
| 3380 | case R_PARISC_PCREL21L: |
| 3381 | case R_PARISC_PCREL17C: |
| 3382 | case R_PARISC_PCREL17R: |
| 3383 | case R_PARISC_PCREL14R: |
| 3384 | case R_PARISC_PCREL14F: |
| 3385 | /* Make it a pc relative offset. */ |
| 3386 | value -= location; |
| 3387 | addend -= 8; |
| 3388 | break; |
| 3389 | |
| 3390 | case R_PARISC_DPREL21L: |
| 3391 | case R_PARISC_DPREL14R: |
| 3392 | case R_PARISC_DPREL14F: |
| 3393 | /* For all the DP relative relocations, we need to examine the symbol's |
| 3394 | section. If it's a code section, then "data pointer relative" makes |
| 3395 | no sense. In that case we don't adjust the "value", and for 21 bit |
| 3396 | addil instructions, we change the source addend register from %dp to |
| 3397 | %r0. This situation commonly arises when a variable's "constness" |
| 3398 | is declared differently from the way the variable is defined. For |
| 3399 | instance: "extern int foo" with foo defined as "const int foo". */ |
| 3400 | if (sym_sec == NULL) |
| 3401 | break; |
| 3402 | if ((sym_sec->flags & SEC_CODE) != 0) |
| 3403 | { |
| 3404 | if ((insn & ((0x3f << 26) | (0x1f << 21))) |
| 3405 | == (((int) OP_ADDIL << 26) | (27 << 21))) |
| 3406 | { |
| 3407 | insn &= ~ (0x1f << 21); |
| 3408 | #if 1 /* debug them. */ |
| 3409 | (*_bfd_error_handler) |
| 3410 | (_("%s(%s+0x%lx): fixing %s"), |
| 3411 | bfd_get_filename (input_bfd), |
| 3412 | input_section->name, |
| 3413 | (long) rel->r_offset, |
| 3414 | howto->name); |
| 3415 | #endif |
| 3416 | } |
| 3417 | /* Now try to make things easy for the dynamic linker. */ |
| 3418 | |
| 3419 | break; |
| 3420 | } |
| 3421 | /* Fall thru. */ |
| 3422 | |
| 3423 | case R_PARISC_DLTIND21L: |
| 3424 | case R_PARISC_DLTIND14R: |
| 3425 | case R_PARISC_DLTIND14F: |
| 3426 | value -= elf_gp (input_section->output_section->owner); |
| 3427 | break; |
| 3428 | |
| 3429 | case R_PARISC_SEGREL32: |
| 3430 | if ((sym_sec->flags & SEC_CODE) != 0) |
| 3431 | value -= hplink->text_segment_base; |
| 3432 | else |
| 3433 | value -= hplink->data_segment_base; |
| 3434 | break; |
| 3435 | |
| 3436 | default: |
| 3437 | break; |
| 3438 | } |
| 3439 | |
| 3440 | switch (r_type) |
| 3441 | { |
| 3442 | case R_PARISC_DIR32: |
| 3443 | case R_PARISC_DIR14F: |
| 3444 | case R_PARISC_DIR17F: |
| 3445 | case R_PARISC_PCREL17C: |
| 3446 | case R_PARISC_PCREL14F: |
| 3447 | case R_PARISC_DPREL14F: |
| 3448 | case R_PARISC_PLABEL32: |
| 3449 | case R_PARISC_DLTIND14F: |
| 3450 | case R_PARISC_SEGBASE: |
| 3451 | case R_PARISC_SEGREL32: |
| 3452 | r_field = e_fsel; |
| 3453 | break; |
| 3454 | |
| 3455 | case R_PARISC_DIR21L: |
| 3456 | case R_PARISC_PCREL21L: |
| 3457 | case R_PARISC_DPREL21L: |
| 3458 | case R_PARISC_PLABEL21L: |
| 3459 | case R_PARISC_DLTIND21L: |
| 3460 | r_field = e_lrsel; |
| 3461 | break; |
| 3462 | |
| 3463 | case R_PARISC_DIR17R: |
| 3464 | case R_PARISC_PCREL17R: |
| 3465 | case R_PARISC_DIR14R: |
| 3466 | case R_PARISC_PCREL14R: |
| 3467 | case R_PARISC_DPREL14R: |
| 3468 | case R_PARISC_PLABEL14R: |
| 3469 | case R_PARISC_DLTIND14R: |
| 3470 | r_field = e_rrsel; |
| 3471 | break; |
| 3472 | |
| 3473 | case R_PARISC_PCREL12F: |
| 3474 | case R_PARISC_PCREL17F: |
| 3475 | case R_PARISC_PCREL22F: |
| 3476 | r_field = e_fsel; |
| 3477 | |
| 3478 | if (r_type == (unsigned int) R_PARISC_PCREL17F) |
| 3479 | { |
| 3480 | max_branch_offset = (1 << (17-1)) << 2; |
| 3481 | } |
| 3482 | else if (r_type == (unsigned int) R_PARISC_PCREL12F) |
| 3483 | { |
| 3484 | max_branch_offset = (1 << (12-1)) << 2; |
| 3485 | } |
| 3486 | else |
| 3487 | { |
| 3488 | max_branch_offset = (1 << (22-1)) << 2; |
| 3489 | } |
| 3490 | |
| 3491 | /* sym_sec is NULL on undefined weak syms or when shared on |
| 3492 | undefined syms. We've already checked for a stub for the |
| 3493 | shared undefined case. */ |
| 3494 | if (sym_sec == NULL) |
| 3495 | break; |
| 3496 | |
| 3497 | /* If the branch is out of reach, then redirect the |
| 3498 | call to the local stub for this function. */ |
| 3499 | if (value + addend + max_branch_offset >= 2*max_branch_offset) |
| 3500 | { |
| 3501 | stub_entry = hppa_get_stub_entry (input_section, sym_sec, |
| 3502 | h, rel, hplink); |
| 3503 | if (stub_entry == NULL) |
| 3504 | return bfd_reloc_notsupported; |
| 3505 | |
| 3506 | /* Munge up the value and addend so that we call the stub |
| 3507 | rather than the procedure directly. */ |
| 3508 | value = (stub_entry->stub_offset |
| 3509 | + stub_entry->stub_sec->output_offset |
| 3510 | + stub_entry->stub_sec->output_section->vma |
| 3511 | - location); |
| 3512 | addend = -8; |
| 3513 | } |
| 3514 | break; |
| 3515 | |
| 3516 | /* Something we don't know how to handle. */ |
| 3517 | default: |
| 3518 | return bfd_reloc_notsupported; |
| 3519 | } |
| 3520 | |
| 3521 | /* Make sure we can reach the stub. */ |
| 3522 | if (max_branch_offset != 0 |
| 3523 | && value + addend + max_branch_offset >= 2*max_branch_offset) |
| 3524 | { |
| 3525 | (*_bfd_error_handler) |
| 3526 | (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"), |
| 3527 | bfd_get_filename (input_bfd), |
| 3528 | input_section->name, |
| 3529 | (long) rel->r_offset, |
| 3530 | stub_entry->root.string); |
| 3531 | return bfd_reloc_notsupported; |
| 3532 | } |
| 3533 | |
| 3534 | val = hppa_field_adjust (value, addend, r_field); |
| 3535 | |
| 3536 | switch (r_type) |
| 3537 | { |
| 3538 | case R_PARISC_PCREL12F: |
| 3539 | case R_PARISC_PCREL17C: |
| 3540 | case R_PARISC_PCREL17F: |
| 3541 | case R_PARISC_PCREL17R: |
| 3542 | case R_PARISC_PCREL22F: |
| 3543 | case R_PARISC_DIR17F: |
| 3544 | case R_PARISC_DIR17R: |
| 3545 | /* This is a branch. Divide the offset by four. |
| 3546 | Note that we need to decide whether it's a branch or |
| 3547 | otherwise by inspecting the reloc. Inspecting insn won't |
| 3548 | work as insn might be from a .word directive. */ |
| 3549 | val >>= 2; |
| 3550 | break; |
| 3551 | |
| 3552 | default: |
| 3553 | break; |
| 3554 | } |
| 3555 | |
| 3556 | insn = hppa_rebuild_insn (insn, val, r_format); |
| 3557 | |
| 3558 | /* Update the instruction word. */ |
| 3559 | bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data); |
| 3560 | return bfd_reloc_ok; |
| 3561 | } |
| 3562 | |
| 3563 | /* Relocate an HPPA ELF section. */ |
| 3564 | |
| 3565 | static boolean |
| 3566 | elf32_hppa_relocate_section (output_bfd, info, input_bfd, input_section, |
| 3567 | contents, relocs, local_syms, local_sections) |
| 3568 | bfd *output_bfd; |
| 3569 | struct bfd_link_info *info; |
| 3570 | bfd *input_bfd; |
| 3571 | asection *input_section; |
| 3572 | bfd_byte *contents; |
| 3573 | Elf_Internal_Rela *relocs; |
| 3574 | Elf_Internal_Sym *local_syms; |
| 3575 | asection **local_sections; |
| 3576 | { |
| 3577 | bfd *dynobj; |
| 3578 | bfd_vma *local_got_offsets; |
| 3579 | struct elf32_hppa_link_hash_table *hplink; |
| 3580 | Elf_Internal_Shdr *symtab_hdr; |
| 3581 | Elf_Internal_Rela *rel; |
| 3582 | Elf_Internal_Rela *relend; |
| 3583 | asection *sreloc; |
| 3584 | |
| 3585 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 3586 | |
| 3587 | hplink = hppa_link_hash_table (info); |
| 3588 | dynobj = hplink->root.dynobj; |
| 3589 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 3590 | sreloc = NULL; |
| 3591 | |
| 3592 | rel = relocs; |
| 3593 | relend = relocs + input_section->reloc_count; |
| 3594 | for (; rel < relend; rel++) |
| 3595 | { |
| 3596 | unsigned int r_type; |
| 3597 | reloc_howto_type *howto; |
| 3598 | unsigned int r_symndx; |
| 3599 | struct elf32_hppa_link_hash_entry *h; |
| 3600 | Elf_Internal_Sym *sym; |
| 3601 | asection *sym_sec; |
| 3602 | bfd_vma relocation; |
| 3603 | bfd_reloc_status_type r; |
| 3604 | const char *sym_name; |
| 3605 | boolean plabel; |
| 3606 | bfd_vma off; |
| 3607 | |
| 3608 | r_type = ELF32_R_TYPE (rel->r_info); |
| 3609 | if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED) |
| 3610 | { |
| 3611 | bfd_set_error (bfd_error_bad_value); |
| 3612 | return false; |
| 3613 | } |
| 3614 | if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY |
| 3615 | || r_type == (unsigned int) R_PARISC_GNU_VTINHERIT) |
| 3616 | continue; |
| 3617 | |
| 3618 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3619 | |
| 3620 | if (info->relocateable) |
| 3621 | { |
| 3622 | /* This is a relocateable link. We don't have to change |
| 3623 | anything, unless the reloc is against a section symbol, |
| 3624 | in which case we have to adjust according to where the |
| 3625 | section symbol winds up in the output section. */ |
| 3626 | if (r_symndx < symtab_hdr->sh_info) |
| 3627 | { |
| 3628 | sym = local_syms + r_symndx; |
| 3629 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 3630 | { |
| 3631 | sym_sec = local_sections[r_symndx]; |
| 3632 | rel->r_addend += sym_sec->output_offset; |
| 3633 | } |
| 3634 | } |
| 3635 | continue; |
| 3636 | } |
| 3637 | |
| 3638 | /* This is a final link. */ |
| 3639 | h = NULL; |
| 3640 | sym = NULL; |
| 3641 | sym_sec = NULL; |
| 3642 | if (r_symndx < symtab_hdr->sh_info) |
| 3643 | { |
| 3644 | /* This is a local symbol, h defaults to NULL. */ |
| 3645 | sym = local_syms + r_symndx; |
| 3646 | sym_sec = local_sections[r_symndx]; |
| 3647 | relocation = ((ELF_ST_TYPE (sym->st_info) == STT_SECTION |
| 3648 | ? 0 : sym->st_value) |
| 3649 | + sym_sec->output_offset |
| 3650 | + sym_sec->output_section->vma); |
| 3651 | } |
| 3652 | else |
| 3653 | { |
| 3654 | int indx; |
| 3655 | |
| 3656 | /* It's a global; Find its entry in the link hash. */ |
| 3657 | indx = r_symndx - symtab_hdr->sh_info; |
| 3658 | h = ((struct elf32_hppa_link_hash_entry *) |
| 3659 | elf_sym_hashes (input_bfd)[indx]); |
| 3660 | while (h->elf.root.type == bfd_link_hash_indirect |
| 3661 | || h->elf.root.type == bfd_link_hash_warning) |
| 3662 | h = (struct elf32_hppa_link_hash_entry *) h->elf.root.u.i.link; |
| 3663 | |
| 3664 | relocation = 0; |
| 3665 | if (h->elf.root.type == bfd_link_hash_defined |
| 3666 | || h->elf.root.type == bfd_link_hash_defweak) |
| 3667 | { |
| 3668 | sym_sec = h->elf.root.u.def.section; |
| 3669 | /* If sym_sec->output_section is NULL, then it's a |
| 3670 | symbol defined in a shared library. */ |
| 3671 | if (sym_sec->output_section != NULL) |
| 3672 | relocation = (h->elf.root.u.def.value |
| 3673 | + sym_sec->output_offset |
| 3674 | + sym_sec->output_section->vma); |
| 3675 | } |
| 3676 | else if (h->elf.root.type == bfd_link_hash_undefweak) |
| 3677 | ; |
| 3678 | else if (info->shared && !info->no_undefined |
| 3679 | && ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT |
| 3680 | && h->elf.type != STT_PARISC_MILLI) |
| 3681 | { |
| 3682 | if (info->symbolic) |
| 3683 | if (!((*info->callbacks->undefined_symbol) |
| 3684 | (info, h->elf.root.root.string, input_bfd, |
| 3685 | input_section, rel->r_offset, false))) |
| 3686 | return false; |
| 3687 | } |
| 3688 | else |
| 3689 | { |
| 3690 | if (!((*info->callbacks->undefined_symbol) |
| 3691 | (info, h->elf.root.root.string, input_bfd, |
| 3692 | input_section, rel->r_offset, true))) |
| 3693 | return false; |
| 3694 | } |
| 3695 | } |
| 3696 | |
| 3697 | /* Do any required modifications to the relocation value, and |
| 3698 | determine what types of dynamic info we need to output, if |
| 3699 | any. */ |
| 3700 | plabel = 0; |
| 3701 | switch (r_type) |
| 3702 | { |
| 3703 | case R_PARISC_DLTIND14F: |
| 3704 | case R_PARISC_DLTIND14R: |
| 3705 | case R_PARISC_DLTIND21L: |
| 3706 | /* Relocation is to the entry for this symbol in the global |
| 3707 | offset table. */ |
| 3708 | if (h != NULL) |
| 3709 | { |
| 3710 | boolean dyn; |
| 3711 | |
| 3712 | off = h->elf.got.offset; |
| 3713 | dyn = hplink->root.dynamic_sections_created; |
| 3714 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, &h->elf)) |
| 3715 | { |
| 3716 | /* This is actually a static link, or it is a |
| 3717 | -Bsymbolic link and the symbol is defined |
| 3718 | locally, or the symbol was forced to be local |
| 3719 | because of a version file. We must initialize |
| 3720 | this entry in the global offset table. Since the |
| 3721 | offset must always be a multiple of 4, we use the |
| 3722 | least significant bit to record whether we have |
| 3723 | initialized it already. |
| 3724 | |
| 3725 | When doing a dynamic link, we create a .rela.got |
| 3726 | relocation entry to initialize the value. This |
| 3727 | is done in the finish_dynamic_symbol routine. */ |
| 3728 | if ((off & 1) != 0) |
| 3729 | off &= ~1; |
| 3730 | else |
| 3731 | { |
| 3732 | bfd_put_32 (output_bfd, relocation, |
| 3733 | hplink->sgot->contents + off); |
| 3734 | h->elf.got.offset |= 1; |
| 3735 | } |
| 3736 | } |
| 3737 | } |
| 3738 | else |
| 3739 | { |
| 3740 | /* Local symbol case. */ |
| 3741 | if (local_got_offsets == NULL) |
| 3742 | abort (); |
| 3743 | |
| 3744 | off = local_got_offsets[r_symndx]; |
| 3745 | |
| 3746 | /* The offset must always be a multiple of 4. We use |
| 3747 | the least significant bit to record whether we have |
| 3748 | already generated the necessary reloc. */ |
| 3749 | if ((off & 1) != 0) |
| 3750 | off &= ~1; |
| 3751 | else |
| 3752 | { |
| 3753 | bfd_put_32 (output_bfd, relocation, |
| 3754 | hplink->sgot->contents + off); |
| 3755 | |
| 3756 | if (info->shared) |
| 3757 | { |
| 3758 | /* Output a dynamic relocation for this GOT |
| 3759 | entry. In this case it is relative to the |
| 3760 | base of the object because the symbol index |
| 3761 | is zero. */ |
| 3762 | Elf_Internal_Rela outrel; |
| 3763 | asection *srelgot = hplink->srelgot; |
| 3764 | |
| 3765 | outrel.r_offset = (off |
| 3766 | + hplink->sgot->output_offset |
| 3767 | + hplink->sgot->output_section->vma); |
| 3768 | outrel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32); |
| 3769 | outrel.r_addend = relocation; |
| 3770 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 3771 | ((Elf32_External_Rela *) |
| 3772 | srelgot->contents |
| 3773 | + srelgot->reloc_count)); |
| 3774 | ++srelgot->reloc_count; |
| 3775 | } |
| 3776 | |
| 3777 | local_got_offsets[r_symndx] |= 1; |
| 3778 | } |
| 3779 | } |
| 3780 | |
| 3781 | if (off >= (bfd_vma) -2) |
| 3782 | abort (); |
| 3783 | |
| 3784 | /* Add the base of the GOT to the relocation value. */ |
| 3785 | relocation = (off |
| 3786 | + hplink->sgot->output_offset |
| 3787 | + hplink->sgot->output_section->vma); |
| 3788 | break; |
| 3789 | |
| 3790 | case R_PARISC_SEGREL32: |
| 3791 | /* If this is the first SEGREL relocation, then initialize |
| 3792 | the segment base values. */ |
| 3793 | if (hplink->text_segment_base == (bfd_vma) -1) |
| 3794 | bfd_map_over_sections (output_bfd, |
| 3795 | hppa_record_segment_addr, |
| 3796 | hplink); |
| 3797 | break; |
| 3798 | |
| 3799 | case R_PARISC_PLABEL14R: |
| 3800 | case R_PARISC_PLABEL21L: |
| 3801 | case R_PARISC_PLABEL32: |
| 3802 | if (hplink->root.dynamic_sections_created) |
| 3803 | { |
| 3804 | /* If we have a global symbol with a PLT slot, then |
| 3805 | redirect this relocation to it. */ |
| 3806 | if (h != NULL) |
| 3807 | { |
| 3808 | off = h->elf.plt.offset; |
| 3809 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, &h->elf)) |
| 3810 | { |
| 3811 | /* In a non-shared link, adjust_dynamic_symbols |
| 3812 | isn't called for symbols forced local. We |
| 3813 | need to write out the plt entry here. */ |
| 3814 | if ((off & 1) != 0) |
| 3815 | off &= ~1; |
| 3816 | else |
| 3817 | { |
| 3818 | bfd_put_32 (output_bfd, |
| 3819 | relocation, |
| 3820 | hplink->splt->contents + off); |
| 3821 | bfd_put_32 (output_bfd, |
| 3822 | elf_gp (hplink->splt->output_section->owner), |
| 3823 | hplink->splt->contents + off + 4); |
| 3824 | h->elf.plt.offset |= 1; |
| 3825 | } |
| 3826 | } |
| 3827 | } |
| 3828 | else |
| 3829 | { |
| 3830 | bfd_vma *local_plt_offsets; |
| 3831 | |
| 3832 | if (local_got_offsets == NULL) |
| 3833 | abort (); |
| 3834 | |
| 3835 | local_plt_offsets = local_got_offsets + symtab_hdr->sh_info; |
| 3836 | off = local_plt_offsets[r_symndx]; |
| 3837 | |
| 3838 | /* As for the local .got entry case, we use the last |
| 3839 | bit to record whether we've already initialised |
| 3840 | this local .plt entry. */ |
| 3841 | if ((off & 1) != 0) |
| 3842 | off &= ~1; |
| 3843 | else |
| 3844 | { |
| 3845 | bfd_put_32 (output_bfd, |
| 3846 | relocation, |
| 3847 | hplink->splt->contents + off); |
| 3848 | bfd_put_32 (output_bfd, |
| 3849 | elf_gp (hplink->splt->output_section->owner), |
| 3850 | hplink->splt->contents + off + 4); |
| 3851 | |
| 3852 | if (info->shared) |
| 3853 | { |
| 3854 | /* Output a dynamic IPLT relocation for this |
| 3855 | PLT entry. */ |
| 3856 | Elf_Internal_Rela outrel; |
| 3857 | asection *srelplt = hplink->srelplt; |
| 3858 | |
| 3859 | outrel.r_offset = (off |
| 3860 | + hplink->splt->output_offset |
| 3861 | + hplink->splt->output_section->vma); |
| 3862 | outrel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT); |
| 3863 | outrel.r_addend = relocation; |
| 3864 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 3865 | ((Elf32_External_Rela *) |
| 3866 | srelplt->contents |
| 3867 | + srelplt->reloc_count)); |
| 3868 | ++srelplt->reloc_count; |
| 3869 | } |
| 3870 | |
| 3871 | local_plt_offsets[r_symndx] |= 1; |
| 3872 | } |
| 3873 | } |
| 3874 | |
| 3875 | if (off >= (bfd_vma) -2) |
| 3876 | abort (); |
| 3877 | |
| 3878 | /* PLABELs contain function pointers. Relocation is to |
| 3879 | the entry for the function in the .plt. The magic +2 |
| 3880 | offset signals to $$dyncall that the function pointer |
| 3881 | is in the .plt and thus has a gp pointer too. |
| 3882 | Exception: Undefined PLABELs should have a value of |
| 3883 | zero. */ |
| 3884 | if (h == NULL |
| 3885 | || (h->elf.root.type != bfd_link_hash_undefweak |
| 3886 | && h->elf.root.type != bfd_link_hash_undefined)) |
| 3887 | { |
| 3888 | relocation = (off |
| 3889 | + hplink->splt->output_offset |
| 3890 | + hplink->splt->output_section->vma |
| 3891 | + 2); |
| 3892 | } |
| 3893 | plabel = 1; |
| 3894 | } |
| 3895 | /* Fall through and possibly emit a dynamic relocation. */ |
| 3896 | |
| 3897 | case R_PARISC_DIR17F: |
| 3898 | case R_PARISC_DIR17R: |
| 3899 | case R_PARISC_DIR14F: |
| 3900 | case R_PARISC_DIR14R: |
| 3901 | case R_PARISC_DIR21L: |
| 3902 | case R_PARISC_DPREL14F: |
| 3903 | case R_PARISC_DPREL14R: |
| 3904 | case R_PARISC_DPREL21L: |
| 3905 | case R_PARISC_DIR32: |
| 3906 | /* The reloc types handled here and this conditional |
| 3907 | expression must match the code in ..check_relocs and |
| 3908 | ..discard_relocs. ie. We need exactly the same condition |
| 3909 | as in ..check_relocs, with some extra conditions (dynindx |
| 3910 | test in this case) to cater for relocs removed by |
| 3911 | ..discard_relocs. If you squint, the non-shared test |
| 3912 | here does indeed match the one in ..check_relocs, the |
| 3913 | difference being that here we test DEF_DYNAMIC as well as |
| 3914 | !DEF_REGULAR. All common syms end up with !DEF_REGULAR, |
| 3915 | which is why we can't use just that test here. |
| 3916 | Conversely, DEF_DYNAMIC can't be used in check_relocs as |
| 3917 | there all files have not been loaded. */ |
| 3918 | if ((info->shared |
| 3919 | && (input_section->flags & SEC_ALLOC) != 0 |
| 3920 | && (IS_ABSOLUTE_RELOC (r_type) |
| 3921 | || (h != NULL |
| 3922 | && h->elf.dynindx != -1 |
| 3923 | && (!info->symbolic |
| 3924 | || (h->elf.elf_link_hash_flags |
| 3925 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| 3926 | || (!info->shared |
| 3927 | && (input_section->flags & SEC_ALLOC) != 0 |
| 3928 | && h != NULL |
| 3929 | && h->elf.dynindx != -1 |
| 3930 | && (h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| 3931 | && (((h->elf.elf_link_hash_flags |
| 3932 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 3933 | && (h->elf.elf_link_hash_flags |
| 3934 | & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 3935 | || h->elf.root.type == bfd_link_hash_undefweak |
| 3936 | || h->elf.root.type == bfd_link_hash_undefined))) |
| 3937 | { |
| 3938 | Elf_Internal_Rela outrel; |
| 3939 | boolean skip; |
| 3940 | |
| 3941 | /* When generating a shared object, these relocations |
| 3942 | are copied into the output file to be resolved at run |
| 3943 | time. */ |
| 3944 | |
| 3945 | if (sreloc == NULL) |
| 3946 | { |
| 3947 | const char *name; |
| 3948 | |
| 3949 | name = (bfd_elf_string_from_elf_section |
| 3950 | (input_bfd, |
| 3951 | elf_elfheader (input_bfd)->e_shstrndx, |
| 3952 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 3953 | if (name == NULL) |
| 3954 | return false; |
| 3955 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 3956 | if (sreloc == NULL) |
| 3957 | abort (); |
| 3958 | } |
| 3959 | |
| 3960 | outrel.r_offset = rel->r_offset; |
| 3961 | outrel.r_addend = rel->r_addend; |
| 3962 | skip = false; |
| 3963 | if (elf_section_data (input_section)->stab_info != NULL) |
| 3964 | { |
| 3965 | off = (_bfd_stab_section_offset |
| 3966 | (output_bfd, &hplink->root.stab_info, |
| 3967 | input_section, |
| 3968 | &elf_section_data (input_section)->stab_info, |
| 3969 | rel->r_offset)); |
| 3970 | if (off == (bfd_vma) -1) |
| 3971 | skip = true; |
| 3972 | outrel.r_offset = off; |
| 3973 | } |
| 3974 | |
| 3975 | outrel.r_offset += (input_section->output_offset |
| 3976 | + input_section->output_section->vma); |
| 3977 | |
| 3978 | if (skip) |
| 3979 | { |
| 3980 | memset (&outrel, 0, sizeof (outrel)); |
| 3981 | } |
| 3982 | else if (h != NULL |
| 3983 | && h->elf.dynindx != -1 |
| 3984 | && (plabel |
| 3985 | || !IS_ABSOLUTE_RELOC (r_type) |
| 3986 | || !info->shared |
| 3987 | || !info->symbolic |
| 3988 | || (h->elf.elf_link_hash_flags |
| 3989 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 3990 | { |
| 3991 | outrel.r_info = ELF32_R_INFO (h->elf.dynindx, r_type); |
| 3992 | } |
| 3993 | else /* It's a local symbol, or one marked to become local. */ |
| 3994 | { |
| 3995 | int indx = 0; |
| 3996 | |
| 3997 | /* Add the absolute offset of the symbol. */ |
| 3998 | outrel.r_addend += relocation; |
| 3999 | |
| 4000 | /* Global plabels need to be processed by the |
| 4001 | dynamic linker so that functions have at most one |
| 4002 | fptr. For this reason, we need to differentiate |
| 4003 | between global and local plabels, which we do by |
| 4004 | providing the function symbol for a global plabel |
| 4005 | reloc, and no symbol for local plabels. */ |
| 4006 | if (! plabel |
| 4007 | && sym_sec != NULL |
| 4008 | && sym_sec->output_section != NULL |
| 4009 | && ! bfd_is_abs_section (sym_sec)) |
| 4010 | { |
| 4011 | indx = elf_section_data (sym_sec->output_section)->dynindx; |
| 4012 | /* We are turning this relocation into one |
| 4013 | against a section symbol, so subtract out the |
| 4014 | output section's address but not the offset |
| 4015 | of the input section in the output section. */ |
| 4016 | outrel.r_addend -= sym_sec->output_section->vma; |
| 4017 | } |
| 4018 | |
| 4019 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 4020 | } |
| 4021 | #if 0 |
| 4022 | /* EH info can cause unaligned DIR32 relocs. |
| 4023 | Tweak the reloc type for the dynamic linker. */ |
| 4024 | if (r_type == R_PARISC_DIR32 && (outrel.r_offset & 3) != 0) |
| 4025 | outrel.r_info = ELF32_R_INFO (ELF32_R_SYM (outrel.r_info), |
| 4026 | R_PARISC_DIR32U); |
| 4027 | #endif |
| 4028 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 4029 | ((Elf32_External_Rela *) |
| 4030 | sreloc->contents |
| 4031 | + sreloc->reloc_count)); |
| 4032 | ++sreloc->reloc_count; |
| 4033 | } |
| 4034 | break; |
| 4035 | |
| 4036 | default: |
| 4037 | break; |
| 4038 | } |
| 4039 | |
| 4040 | r = final_link_relocate (input_section, contents, rel, relocation, |
| 4041 | hplink, sym_sec, h); |
| 4042 | |
| 4043 | if (r == bfd_reloc_ok) |
| 4044 | continue; |
| 4045 | |
| 4046 | if (h != NULL) |
| 4047 | sym_name = h->elf.root.root.string; |
| 4048 | else |
| 4049 | { |
| 4050 | sym_name = bfd_elf_string_from_elf_section (input_bfd, |
| 4051 | symtab_hdr->sh_link, |
| 4052 | sym->st_name); |
| 4053 | if (sym_name == NULL) |
| 4054 | return false; |
| 4055 | if (*sym_name == '\0') |
| 4056 | sym_name = bfd_section_name (input_bfd, sym_sec); |
| 4057 | } |
| 4058 | |
| 4059 | howto = elf_hppa_howto_table + r_type; |
| 4060 | |
| 4061 | if (r == bfd_reloc_undefined || r == bfd_reloc_notsupported) |
| 4062 | { |
| 4063 | (*_bfd_error_handler) |
| 4064 | (_("%s(%s+0x%lx): cannot handle %s for %s"), |
| 4065 | bfd_get_filename (input_bfd), |
| 4066 | input_section->name, |
| 4067 | (long) rel->r_offset, |
| 4068 | howto->name, |
| 4069 | sym_name); |
| 4070 | } |
| 4071 | else |
| 4072 | { |
| 4073 | if (!((*info->callbacks->reloc_overflow) |
| 4074 | (info, sym_name, howto->name, (bfd_vma) 0, |
| 4075 | input_bfd, input_section, rel->r_offset))) |
| 4076 | return false; |
| 4077 | } |
| 4078 | } |
| 4079 | |
| 4080 | return true; |
| 4081 | } |
| 4082 | |
| 4083 | /* Comparison function for qsort to sort unwind section during a |
| 4084 | final link. */ |
| 4085 | |
| 4086 | static int |
| 4087 | hppa_unwind_entry_compare (a, b) |
| 4088 | const PTR a; |
| 4089 | const PTR b; |
| 4090 | { |
| 4091 | const bfd_byte *ap, *bp; |
| 4092 | unsigned long av, bv; |
| 4093 | |
| 4094 | ap = (const bfd_byte *) a; |
| 4095 | av = (unsigned long) ap[0] << 24; |
| 4096 | av |= (unsigned long) ap[1] << 16; |
| 4097 | av |= (unsigned long) ap[2] << 8; |
| 4098 | av |= (unsigned long) ap[3]; |
| 4099 | |
| 4100 | bp = (const bfd_byte *) b; |
| 4101 | bv = (unsigned long) bp[0] << 24; |
| 4102 | bv |= (unsigned long) bp[1] << 16; |
| 4103 | bv |= (unsigned long) bp[2] << 8; |
| 4104 | bv |= (unsigned long) bp[3]; |
| 4105 | |
| 4106 | return av < bv ? -1 : av > bv ? 1 : 0; |
| 4107 | } |
| 4108 | |
| 4109 | /* Finish up dynamic symbol handling. We set the contents of various |
| 4110 | dynamic sections here. */ |
| 4111 | |
| 4112 | static boolean |
| 4113 | elf32_hppa_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 4114 | bfd *output_bfd; |
| 4115 | struct bfd_link_info *info; |
| 4116 | struct elf_link_hash_entry *h; |
| 4117 | Elf_Internal_Sym *sym; |
| 4118 | { |
| 4119 | struct elf32_hppa_link_hash_table *hplink; |
| 4120 | bfd *dynobj; |
| 4121 | |
| 4122 | hplink = hppa_link_hash_table (info); |
| 4123 | dynobj = hplink->root.dynobj; |
| 4124 | |
| 4125 | if (h->plt.offset != (bfd_vma) -1) |
| 4126 | { |
| 4127 | bfd_vma value; |
| 4128 | |
| 4129 | if (h->plt.offset & 1) |
| 4130 | abort (); |
| 4131 | |
| 4132 | /* This symbol has an entry in the procedure linkage table. Set |
| 4133 | it up. |
| 4134 | |
| 4135 | The format of a plt entry is |
| 4136 | <funcaddr> |
| 4137 | <__gp> |
| 4138 | */ |
| 4139 | value = 0; |
| 4140 | if (h->root.type == bfd_link_hash_defined |
| 4141 | || h->root.type == bfd_link_hash_defweak) |
| 4142 | { |
| 4143 | value = h->root.u.def.value; |
| 4144 | if (h->root.u.def.section->output_section != NULL) |
| 4145 | value += (h->root.u.def.section->output_offset |
| 4146 | + h->root.u.def.section->output_section->vma); |
| 4147 | } |
| 4148 | |
| 4149 | if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call) |
| 4150 | { |
| 4151 | Elf_Internal_Rela rel; |
| 4152 | |
| 4153 | /* Create a dynamic IPLT relocation for this entry. */ |
| 4154 | rel.r_offset = (h->plt.offset |
| 4155 | + hplink->splt->output_offset |
| 4156 | + hplink->splt->output_section->vma); |
| 4157 | if (! ((struct elf32_hppa_link_hash_entry *) h)->plt_abs |
| 4158 | && h->dynindx != -1) |
| 4159 | { |
| 4160 | /* To support lazy linking, the function pointer is |
| 4161 | initialised to point to a special stub stored at the |
| 4162 | end of the .plt. This is not done for plt entries |
| 4163 | with a base-relative dynamic relocation. */ |
| 4164 | value = (hplink->splt->output_offset |
| 4165 | + hplink->splt->output_section->vma |
| 4166 | + hplink->splt->_raw_size |
| 4167 | - sizeof (plt_stub) |
| 4168 | + PLT_STUB_ENTRY); |
| 4169 | rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_IPLT); |
| 4170 | rel.r_addend = 0; |
| 4171 | } |
| 4172 | else |
| 4173 | { |
| 4174 | /* This symbol has been marked to become local, and is |
| 4175 | used by a plabel so must be kept in the .plt. */ |
| 4176 | rel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT); |
| 4177 | rel.r_addend = value; |
| 4178 | } |
| 4179 | |
| 4180 | bfd_elf32_swap_reloca_out (hplink->splt->output_section->owner, |
| 4181 | &rel, |
| 4182 | ((Elf32_External_Rela *) |
| 4183 | hplink->srelplt->contents |
| 4184 | + hplink->srelplt->reloc_count)); |
| 4185 | hplink->srelplt->reloc_count++; |
| 4186 | } |
| 4187 | |
| 4188 | bfd_put_32 (hplink->splt->owner, |
| 4189 | value, |
| 4190 | hplink->splt->contents + h->plt.offset); |
| 4191 | bfd_put_32 (hplink->splt->owner, |
| 4192 | elf_gp (hplink->splt->output_section->owner), |
| 4193 | hplink->splt->contents + h->plt.offset + 4); |
| 4194 | if (PLABEL_PLT_ENTRY_SIZE != PLT_ENTRY_SIZE |
| 4195 | && ((struct elf32_hppa_link_hash_entry *) h)->plabel |
| 4196 | && h->dynindx != -1) |
| 4197 | { |
| 4198 | memset (hplink->splt->contents + h->plt.offset + 8, |
| 4199 | 0, PLABEL_PLT_ENTRY_SIZE - PLT_ENTRY_SIZE); |
| 4200 | } |
| 4201 | |
| 4202 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 4203 | { |
| 4204 | /* Mark the symbol as undefined, rather than as defined in |
| 4205 | the .plt section. Leave the value alone. */ |
| 4206 | sym->st_shndx = SHN_UNDEF; |
| 4207 | } |
| 4208 | } |
| 4209 | |
| 4210 | if (h->got.offset != (bfd_vma) -1) |
| 4211 | { |
| 4212 | Elf_Internal_Rela rel; |
| 4213 | |
| 4214 | /* This symbol has an entry in the global offset table. Set it |
| 4215 | up. */ |
| 4216 | |
| 4217 | rel.r_offset = ((h->got.offset &~ (bfd_vma) 1) |
| 4218 | + hplink->sgot->output_offset |
| 4219 | + hplink->sgot->output_section->vma); |
| 4220 | |
| 4221 | /* If this is a -Bsymbolic link and the symbol is defined |
| 4222 | locally or was forced to be local because of a version file, |
| 4223 | we just want to emit a RELATIVE reloc. The entry in the |
| 4224 | global offset table will already have been initialized in the |
| 4225 | relocate_section function. */ |
| 4226 | if (info->shared |
| 4227 | && (info->symbolic || h->dynindx == -1) |
| 4228 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| 4229 | { |
| 4230 | rel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32); |
| 4231 | rel.r_addend = (h->root.u.def.value |
| 4232 | + h->root.u.def.section->output_offset |
| 4233 | + h->root.u.def.section->output_section->vma); |
| 4234 | } |
| 4235 | else |
| 4236 | { |
| 4237 | if ((h->got.offset & 1) != 0) |
| 4238 | abort (); |
| 4239 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
| 4240 | hplink->sgot->contents + h->got.offset); |
| 4241 | rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_DIR32); |
| 4242 | rel.r_addend = 0; |
| 4243 | } |
| 4244 | |
| 4245 | bfd_elf32_swap_reloca_out (output_bfd, &rel, |
| 4246 | ((Elf32_External_Rela *) |
| 4247 | hplink->srelgot->contents |
| 4248 | + hplink->srelgot->reloc_count)); |
| 4249 | ++hplink->srelgot->reloc_count; |
| 4250 | } |
| 4251 | |
| 4252 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| 4253 | { |
| 4254 | asection *s; |
| 4255 | Elf_Internal_Rela rel; |
| 4256 | |
| 4257 | /* This symbol needs a copy reloc. Set it up. */ |
| 4258 | |
| 4259 | if (! (h->dynindx != -1 |
| 4260 | && (h->root.type == bfd_link_hash_defined |
| 4261 | || h->root.type == bfd_link_hash_defweak))) |
| 4262 | abort (); |
| 4263 | |
| 4264 | s = hplink->srelbss; |
| 4265 | |
| 4266 | rel.r_offset = (h->root.u.def.value |
| 4267 | + h->root.u.def.section->output_offset |
| 4268 | + h->root.u.def.section->output_section->vma); |
| 4269 | rel.r_addend = 0; |
| 4270 | rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_COPY); |
| 4271 | bfd_elf32_swap_reloca_out (output_bfd, &rel, |
| 4272 | ((Elf32_External_Rela *) s->contents |
| 4273 | + s->reloc_count)); |
| 4274 | ++s->reloc_count; |
| 4275 | } |
| 4276 | |
| 4277 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 4278 | if (h->root.root.string[0] == '_' |
| 4279 | && (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 4280 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)) |
| 4281 | { |
| 4282 | sym->st_shndx = SHN_ABS; |
| 4283 | } |
| 4284 | |
| 4285 | return true; |
| 4286 | } |
| 4287 | |
| 4288 | /* Finish up the dynamic sections. */ |
| 4289 | |
| 4290 | static boolean |
| 4291 | elf32_hppa_finish_dynamic_sections (output_bfd, info) |
| 4292 | bfd *output_bfd; |
| 4293 | struct bfd_link_info *info; |
| 4294 | { |
| 4295 | bfd *dynobj; |
| 4296 | struct elf32_hppa_link_hash_table *hplink; |
| 4297 | asection *sdyn; |
| 4298 | |
| 4299 | hplink = hppa_link_hash_table (info); |
| 4300 | dynobj = hplink->root.dynobj; |
| 4301 | |
| 4302 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 4303 | |
| 4304 | if (hplink->root.dynamic_sections_created) |
| 4305 | { |
| 4306 | Elf32_External_Dyn *dyncon, *dynconend; |
| 4307 | |
| 4308 | if (sdyn == NULL) |
| 4309 | abort (); |
| 4310 | |
| 4311 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 4312 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 4313 | for (; dyncon < dynconend; dyncon++) |
| 4314 | { |
| 4315 | Elf_Internal_Dyn dyn; |
| 4316 | asection *s; |
| 4317 | |
| 4318 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 4319 | |
| 4320 | switch (dyn.d_tag) |
| 4321 | { |
| 4322 | default: |
| 4323 | break; |
| 4324 | |
| 4325 | case DT_PLTGOT: |
| 4326 | /* Use PLTGOT to set the GOT register. */ |
| 4327 | dyn.d_un.d_ptr = elf_gp (output_bfd); |
| 4328 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4329 | break; |
| 4330 | |
| 4331 | case DT_JMPREL: |
| 4332 | s = hplink->srelplt; |
| 4333 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 4334 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4335 | break; |
| 4336 | |
| 4337 | case DT_PLTRELSZ: |
| 4338 | s = hplink->srelplt; |
| 4339 | if (s->_cooked_size != 0) |
| 4340 | dyn.d_un.d_val = s->_cooked_size; |
| 4341 | else |
| 4342 | dyn.d_un.d_val = s->_raw_size; |
| 4343 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4344 | break; |
| 4345 | } |
| 4346 | } |
| 4347 | } |
| 4348 | |
| 4349 | if (hplink->sgot != NULL && hplink->sgot->_raw_size != 0) |
| 4350 | { |
| 4351 | /* Fill in the first entry in the global offset table. |
| 4352 | We use it to point to our dynamic section, if we have one. */ |
| 4353 | bfd_put_32 (output_bfd, |
| 4354 | (sdyn != NULL |
| 4355 | ? sdyn->output_section->vma + sdyn->output_offset |
| 4356 | : (bfd_vma) 0), |
| 4357 | hplink->sgot->contents); |
| 4358 | |
| 4359 | /* The second entry is reserved for use by the dynamic linker. */ |
| 4360 | memset (hplink->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE); |
| 4361 | |
| 4362 | /* Set .got entry size. */ |
| 4363 | elf_section_data (hplink->sgot->output_section) |
| 4364 | ->this_hdr.sh_entsize = GOT_ENTRY_SIZE; |
| 4365 | } |
| 4366 | |
| 4367 | if (hplink->splt != NULL && hplink->splt->_raw_size != 0) |
| 4368 | { |
| 4369 | /* Set plt entry size. */ |
| 4370 | elf_section_data (hplink->splt->output_section) |
| 4371 | ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; |
| 4372 | |
| 4373 | if (hplink->need_plt_stub) |
| 4374 | { |
| 4375 | /* Set up the .plt stub. */ |
| 4376 | memcpy (hplink->splt->contents |
| 4377 | + hplink->splt->_raw_size - sizeof (plt_stub), |
| 4378 | plt_stub, sizeof (plt_stub)); |
| 4379 | |
| 4380 | if ((hplink->splt->output_offset |
| 4381 | + hplink->splt->output_section->vma |
| 4382 | + hplink->splt->_raw_size) |
| 4383 | != (hplink->sgot->output_offset |
| 4384 | + hplink->sgot->output_section->vma)) |
| 4385 | { |
| 4386 | (*_bfd_error_handler) |
| 4387 | (_(".got section not immediately after .plt section")); |
| 4388 | return false; |
| 4389 | } |
| 4390 | } |
| 4391 | } |
| 4392 | |
| 4393 | return true; |
| 4394 | } |
| 4395 | |
| 4396 | /* Tweak the OSABI field of the elf header. */ |
| 4397 | |
| 4398 | static void |
| 4399 | elf32_hppa_post_process_headers (abfd, link_info) |
| 4400 | bfd *abfd; |
| 4401 | struct bfd_link_info *link_info ATTRIBUTE_UNUSED; |
| 4402 | { |
| 4403 | Elf_Internal_Ehdr * i_ehdrp; |
| 4404 | |
| 4405 | i_ehdrp = elf_elfheader (abfd); |
| 4406 | |
| 4407 | if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0) |
| 4408 | { |
| 4409 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX; |
| 4410 | } |
| 4411 | else |
| 4412 | { |
| 4413 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_HPUX; |
| 4414 | } |
| 4415 | } |
| 4416 | |
| 4417 | /* Called when writing out an object file to decide the type of a |
| 4418 | symbol. */ |
| 4419 | static int |
| 4420 | elf32_hppa_elf_get_symbol_type (elf_sym, type) |
| 4421 | Elf_Internal_Sym *elf_sym; |
| 4422 | int type; |
| 4423 | { |
| 4424 | if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI) |
| 4425 | return STT_PARISC_MILLI; |
| 4426 | else |
| 4427 | return type; |
| 4428 | } |
| 4429 | |
| 4430 | /* Misc BFD support code. */ |
| 4431 | #define bfd_elf32_bfd_is_local_label_name elf_hppa_is_local_label_name |
| 4432 | #define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup |
| 4433 | #define elf_info_to_howto elf_hppa_info_to_howto |
| 4434 | #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel |
| 4435 | |
| 4436 | /* Stuff for the BFD linker. */ |
| 4437 | #define bfd_elf32_bfd_final_link elf32_hppa_final_link |
| 4438 | #define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create |
| 4439 | #define elf_backend_add_symbol_hook elf32_hppa_add_symbol_hook |
| 4440 | #define elf_backend_adjust_dynamic_symbol elf32_hppa_adjust_dynamic_symbol |
| 4441 | #define elf_backend_check_relocs elf32_hppa_check_relocs |
| 4442 | #define elf_backend_create_dynamic_sections elf32_hppa_create_dynamic_sections |
| 4443 | #define elf_backend_fake_sections elf_hppa_fake_sections |
| 4444 | #define elf_backend_relocate_section elf32_hppa_relocate_section |
| 4445 | #define elf_backend_hide_symbol elf32_hppa_hide_symbol |
| 4446 | #define elf_backend_finish_dynamic_symbol elf32_hppa_finish_dynamic_symbol |
| 4447 | #define elf_backend_finish_dynamic_sections elf32_hppa_finish_dynamic_sections |
| 4448 | #define elf_backend_size_dynamic_sections elf32_hppa_size_dynamic_sections |
| 4449 | #define elf_backend_gc_mark_hook elf32_hppa_gc_mark_hook |
| 4450 | #define elf_backend_gc_sweep_hook elf32_hppa_gc_sweep_hook |
| 4451 | #define elf_backend_object_p elf32_hppa_object_p |
| 4452 | #define elf_backend_final_write_processing elf_hppa_final_write_processing |
| 4453 | #define elf_backend_post_process_headers elf32_hppa_post_process_headers |
| 4454 | #define elf_backend_get_symbol_type elf32_hppa_elf_get_symbol_type |
| 4455 | |
| 4456 | #define elf_backend_can_gc_sections 1 |
| 4457 | #define elf_backend_plt_alignment 2 |
| 4458 | #define elf_backend_want_got_plt 0 |
| 4459 | #define elf_backend_plt_readonly 0 |
| 4460 | #define elf_backend_want_plt_sym 0 |
| 4461 | #define elf_backend_got_header_size 8 |
| 4462 | |
| 4463 | #define TARGET_BIG_SYM bfd_elf32_hppa_vec |
| 4464 | #define TARGET_BIG_NAME "elf32-hppa" |
| 4465 | #define ELF_ARCH bfd_arch_hppa |
| 4466 | #define ELF_MACHINE_CODE EM_PARISC |
| 4467 | #define ELF_MAXPAGESIZE 0x1000 |
| 4468 | |
| 4469 | #include "elf32-target.h" |
| 4470 | |
| 4471 | #undef TARGET_BIG_SYM |
| 4472 | #define TARGET_BIG_SYM bfd_elf32_hppa_linux_vec |
| 4473 | #undef TARGET_BIG_NAME |
| 4474 | #define TARGET_BIG_NAME "elf32-hppa-linux" |
| 4475 | |
| 4476 | #define INCLUDED_TARGET_FILE 1 |
| 4477 | #include "elf32-target.h" |