| 1 | /* Alpha specific support for 64-bit ELF |
| 2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
| 3 | 2006 Free Software Foundation, Inc. |
| 4 | Contributed by Richard Henderson <rth@tamu.edu>. |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | /* We need a published ABI spec for this. Until one comes out, don't |
| 23 | assume this'll remain unchanged forever. */ |
| 24 | |
| 25 | #include "bfd.h" |
| 26 | #include "sysdep.h" |
| 27 | #include "libbfd.h" |
| 28 | #include "elf-bfd.h" |
| 29 | |
| 30 | #include "elf/alpha.h" |
| 31 | |
| 32 | #define ALPHAECOFF |
| 33 | |
| 34 | #define NO_COFF_RELOCS |
| 35 | #define NO_COFF_SYMBOLS |
| 36 | #define NO_COFF_LINENOS |
| 37 | |
| 38 | /* Get the ECOFF swapping routines. Needed for the debug information. */ |
| 39 | #include "coff/internal.h" |
| 40 | #include "coff/sym.h" |
| 41 | #include "coff/symconst.h" |
| 42 | #include "coff/ecoff.h" |
| 43 | #include "coff/alpha.h" |
| 44 | #include "aout/ar.h" |
| 45 | #include "libcoff.h" |
| 46 | #include "libecoff.h" |
| 47 | #define ECOFF_64 |
| 48 | #include "ecoffswap.h" |
| 49 | |
| 50 | \f |
| 51 | /* Instruction data for plt generation and relaxation. */ |
| 52 | |
| 53 | #define OP_LDA 0x08 |
| 54 | #define OP_LDAH 0x09 |
| 55 | #define OP_LDQ 0x29 |
| 56 | #define OP_BR 0x30 |
| 57 | #define OP_BSR 0x34 |
| 58 | |
| 59 | #define INSN_LDA (OP_LDA << 26) |
| 60 | #define INSN_LDAH (OP_LDAH << 26) |
| 61 | #define INSN_LDQ (OP_LDQ << 26) |
| 62 | #define INSN_BR (OP_BR << 26) |
| 63 | |
| 64 | #define INSN_ADDQ 0x40000400 |
| 65 | #define INSN_RDUNIQ 0x0000009e |
| 66 | #define INSN_SUBQ 0x40000520 |
| 67 | #define INSN_S4SUBQ 0x40000560 |
| 68 | #define INSN_UNOP 0x2ffe0000 |
| 69 | |
| 70 | #define INSN_JSR 0x68004000 |
| 71 | #define INSN_JMP 0x68000000 |
| 72 | #define INSN_JSR_MASK 0xfc00c000 |
| 73 | |
| 74 | #define INSN_A(I,A) (I | (A << 21)) |
| 75 | #define INSN_AB(I,A,B) (I | (A << 21) | (B << 16)) |
| 76 | #define INSN_ABC(I,A,B,C) (I | (A << 21) | (B << 16) | C) |
| 77 | #define INSN_ABO(I,A,B,O) (I | (A << 21) | (B << 16) | ((O) & 0xffff)) |
| 78 | #define INSN_AD(I,A,D) (I | (A << 21) | (((D) >> 2) & 0x1fffff)) |
| 79 | |
| 80 | /* PLT/GOT Stuff */ |
| 81 | |
| 82 | /* Set by ld emulation. Putting this into the link_info or hash structure |
| 83 | is simply working too hard. */ |
| 84 | #ifdef USE_SECUREPLT |
| 85 | bfd_boolean elf64_alpha_use_secureplt = TRUE; |
| 86 | #else |
| 87 | bfd_boolean elf64_alpha_use_secureplt = FALSE; |
| 88 | #endif |
| 89 | |
| 90 | #define OLD_PLT_HEADER_SIZE 32 |
| 91 | #define OLD_PLT_ENTRY_SIZE 12 |
| 92 | #define NEW_PLT_HEADER_SIZE 36 |
| 93 | #define NEW_PLT_ENTRY_SIZE 4 |
| 94 | |
| 95 | #define PLT_HEADER_SIZE \ |
| 96 | (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE) |
| 97 | #define PLT_ENTRY_SIZE \ |
| 98 | (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE) |
| 99 | |
| 100 | #define MAX_GOT_SIZE (64*1024) |
| 101 | |
| 102 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so" |
| 103 | \f |
| 104 | struct alpha_elf_link_hash_entry |
| 105 | { |
| 106 | struct elf_link_hash_entry root; |
| 107 | |
| 108 | /* External symbol information. */ |
| 109 | EXTR esym; |
| 110 | |
| 111 | /* Cumulative flags for all the .got entries. */ |
| 112 | int flags; |
| 113 | |
| 114 | /* Contexts in which a literal was referenced. */ |
| 115 | #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01 |
| 116 | #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02 |
| 117 | #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04 |
| 118 | #define ALPHA_ELF_LINK_HASH_LU_JSR 0x08 |
| 119 | #define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10 |
| 120 | #define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20 |
| 121 | #define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40 |
| 122 | #define ALPHA_ELF_LINK_HASH_LU_PLT 0x38 |
| 123 | #define ALPHA_ELF_LINK_HASH_TLS_IE 0x80 |
| 124 | |
| 125 | /* Used to implement multiple .got subsections. */ |
| 126 | struct alpha_elf_got_entry |
| 127 | { |
| 128 | struct alpha_elf_got_entry *next; |
| 129 | |
| 130 | /* Which .got subsection? */ |
| 131 | bfd *gotobj; |
| 132 | |
| 133 | /* The addend in effect for this entry. */ |
| 134 | bfd_vma addend; |
| 135 | |
| 136 | /* The .got offset for this entry. */ |
| 137 | int got_offset; |
| 138 | |
| 139 | /* The .plt offset for this entry. */ |
| 140 | int plt_offset; |
| 141 | |
| 142 | /* How many references to this entry? */ |
| 143 | int use_count; |
| 144 | |
| 145 | /* The relocation type of this entry. */ |
| 146 | unsigned char reloc_type; |
| 147 | |
| 148 | /* How a LITERAL is used. */ |
| 149 | unsigned char flags; |
| 150 | |
| 151 | /* Have we initialized the dynamic relocation for this entry? */ |
| 152 | unsigned char reloc_done; |
| 153 | |
| 154 | /* Have we adjusted this entry for SEC_MERGE? */ |
| 155 | unsigned char reloc_xlated; |
| 156 | } *got_entries; |
| 157 | |
| 158 | /* Used to count non-got, non-plt relocations for delayed sizing |
| 159 | of relocation sections. */ |
| 160 | struct alpha_elf_reloc_entry |
| 161 | { |
| 162 | struct alpha_elf_reloc_entry *next; |
| 163 | |
| 164 | /* Which .reloc section? */ |
| 165 | asection *srel; |
| 166 | |
| 167 | /* What kind of relocation? */ |
| 168 | unsigned int rtype; |
| 169 | |
| 170 | /* Is this against read-only section? */ |
| 171 | unsigned int reltext : 1; |
| 172 | |
| 173 | /* How many did we find? */ |
| 174 | unsigned long count; |
| 175 | } *reloc_entries; |
| 176 | }; |
| 177 | |
| 178 | /* Alpha ELF linker hash table. */ |
| 179 | |
| 180 | struct alpha_elf_link_hash_table |
| 181 | { |
| 182 | struct elf_link_hash_table root; |
| 183 | |
| 184 | /* The head of a list of .got subsections linked through |
| 185 | alpha_elf_tdata(abfd)->got_link_next. */ |
| 186 | bfd *got_list; |
| 187 | }; |
| 188 | |
| 189 | /* Look up an entry in a Alpha ELF linker hash table. */ |
| 190 | |
| 191 | #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \ |
| 192 | ((struct alpha_elf_link_hash_entry *) \ |
| 193 | elf_link_hash_lookup (&(table)->root, (string), (create), \ |
| 194 | (copy), (follow))) |
| 195 | |
| 196 | /* Traverse a Alpha ELF linker hash table. */ |
| 197 | |
| 198 | #define alpha_elf_link_hash_traverse(table, func, info) \ |
| 199 | (elf_link_hash_traverse \ |
| 200 | (&(table)->root, \ |
| 201 | (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \ |
| 202 | (info))) |
| 203 | |
| 204 | /* Get the Alpha ELF linker hash table from a link_info structure. */ |
| 205 | |
| 206 | #define alpha_elf_hash_table(p) \ |
| 207 | ((struct alpha_elf_link_hash_table *) ((p)->hash)) |
| 208 | |
| 209 | /* Get the object's symbols as our own entry type. */ |
| 210 | |
| 211 | #define alpha_elf_sym_hashes(abfd) \ |
| 212 | ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd)) |
| 213 | |
| 214 | /* Should we do dynamic things to this symbol? This differs from the |
| 215 | generic version in that we never need to consider function pointer |
| 216 | equality wrt PLT entries -- we don't create a PLT entry if a symbol's |
| 217 | address is ever taken. */ |
| 218 | |
| 219 | static inline bfd_boolean |
| 220 | alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, |
| 221 | struct bfd_link_info *info) |
| 222 | { |
| 223 | return _bfd_elf_dynamic_symbol_p (h, info, 0); |
| 224 | } |
| 225 | |
| 226 | /* Create an entry in a Alpha ELF linker hash table. */ |
| 227 | |
| 228 | static struct bfd_hash_entry * |
| 229 | elf64_alpha_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 230 | struct bfd_hash_table *table, |
| 231 | const char *string) |
| 232 | { |
| 233 | struct alpha_elf_link_hash_entry *ret = |
| 234 | (struct alpha_elf_link_hash_entry *) entry; |
| 235 | |
| 236 | /* Allocate the structure if it has not already been allocated by a |
| 237 | subclass. */ |
| 238 | if (ret == (struct alpha_elf_link_hash_entry *) NULL) |
| 239 | ret = ((struct alpha_elf_link_hash_entry *) |
| 240 | bfd_hash_allocate (table, |
| 241 | sizeof (struct alpha_elf_link_hash_entry))); |
| 242 | if (ret == (struct alpha_elf_link_hash_entry *) NULL) |
| 243 | return (struct bfd_hash_entry *) ret; |
| 244 | |
| 245 | /* Call the allocation method of the superclass. */ |
| 246 | ret = ((struct alpha_elf_link_hash_entry *) |
| 247 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 248 | table, string)); |
| 249 | if (ret != (struct alpha_elf_link_hash_entry *) NULL) |
| 250 | { |
| 251 | /* Set local fields. */ |
| 252 | memset (&ret->esym, 0, sizeof (EXTR)); |
| 253 | /* We use -2 as a marker to indicate that the information has |
| 254 | not been set. -1 means there is no associated ifd. */ |
| 255 | ret->esym.ifd = -2; |
| 256 | ret->flags = 0; |
| 257 | ret->got_entries = NULL; |
| 258 | ret->reloc_entries = NULL; |
| 259 | } |
| 260 | |
| 261 | return (struct bfd_hash_entry *) ret; |
| 262 | } |
| 263 | |
| 264 | /* Create a Alpha ELF linker hash table. */ |
| 265 | |
| 266 | static struct bfd_link_hash_table * |
| 267 | elf64_alpha_bfd_link_hash_table_create (bfd *abfd) |
| 268 | { |
| 269 | struct alpha_elf_link_hash_table *ret; |
| 270 | bfd_size_type amt = sizeof (struct alpha_elf_link_hash_table); |
| 271 | |
| 272 | ret = (struct alpha_elf_link_hash_table *) bfd_zmalloc (amt); |
| 273 | if (ret == (struct alpha_elf_link_hash_table *) NULL) |
| 274 | return NULL; |
| 275 | |
| 276 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 277 | elf64_alpha_link_hash_newfunc, |
| 278 | sizeof (struct alpha_elf_link_hash_entry))) |
| 279 | { |
| 280 | free (ret); |
| 281 | return NULL; |
| 282 | } |
| 283 | |
| 284 | return &ret->root.root; |
| 285 | } |
| 286 | \f |
| 287 | /* We have some private fields hanging off of the elf_tdata structure. */ |
| 288 | |
| 289 | struct alpha_elf_obj_tdata |
| 290 | { |
| 291 | struct elf_obj_tdata root; |
| 292 | |
| 293 | /* For every input file, these are the got entries for that object's |
| 294 | local symbols. */ |
| 295 | struct alpha_elf_got_entry ** local_got_entries; |
| 296 | |
| 297 | /* For every input file, this is the object that owns the got that |
| 298 | this input file uses. */ |
| 299 | bfd *gotobj; |
| 300 | |
| 301 | /* For every got, this is a linked list through the objects using this got */ |
| 302 | bfd *in_got_link_next; |
| 303 | |
| 304 | /* For every got, this is a link to the next got subsegment. */ |
| 305 | bfd *got_link_next; |
| 306 | |
| 307 | /* For every got, this is the section. */ |
| 308 | asection *got; |
| 309 | |
| 310 | /* For every got, this is it's total number of words. */ |
| 311 | int total_got_size; |
| 312 | |
| 313 | /* For every got, this is the sum of the number of words required |
| 314 | to hold all of the member object's local got. */ |
| 315 | int local_got_size; |
| 316 | }; |
| 317 | |
| 318 | #define alpha_elf_tdata(abfd) \ |
| 319 | ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any) |
| 320 | |
| 321 | static bfd_boolean |
| 322 | elf64_alpha_mkobject (bfd *abfd) |
| 323 | { |
| 324 | if (abfd->tdata.any == NULL) |
| 325 | { |
| 326 | bfd_size_type amt = sizeof (struct alpha_elf_obj_tdata); |
| 327 | abfd->tdata.any = bfd_zalloc (abfd, amt); |
| 328 | if (abfd->tdata.any == NULL) |
| 329 | return FALSE; |
| 330 | } |
| 331 | return bfd_elf_mkobject (abfd); |
| 332 | } |
| 333 | |
| 334 | static bfd_boolean |
| 335 | elf64_alpha_object_p (bfd *abfd) |
| 336 | { |
| 337 | /* Set the right machine number for an Alpha ELF file. */ |
| 338 | return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0); |
| 339 | } |
| 340 | \f |
| 341 | /* A relocation function which doesn't do anything. */ |
| 342 | |
| 343 | static bfd_reloc_status_type |
| 344 | elf64_alpha_reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc, |
| 345 | asymbol *sym ATTRIBUTE_UNUSED, |
| 346 | PTR data ATTRIBUTE_UNUSED, asection *sec, |
| 347 | bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) |
| 348 | { |
| 349 | if (output_bfd) |
| 350 | reloc->address += sec->output_offset; |
| 351 | return bfd_reloc_ok; |
| 352 | } |
| 353 | |
| 354 | /* A relocation function used for an unsupported reloc. */ |
| 355 | |
| 356 | static bfd_reloc_status_type |
| 357 | elf64_alpha_reloc_bad (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc, |
| 358 | asymbol *sym ATTRIBUTE_UNUSED, |
| 359 | PTR data ATTRIBUTE_UNUSED, asection *sec, |
| 360 | bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) |
| 361 | { |
| 362 | if (output_bfd) |
| 363 | reloc->address += sec->output_offset; |
| 364 | return bfd_reloc_notsupported; |
| 365 | } |
| 366 | |
| 367 | /* Do the work of the GPDISP relocation. */ |
| 368 | |
| 369 | static bfd_reloc_status_type |
| 370 | elf64_alpha_do_reloc_gpdisp (bfd *abfd, bfd_vma gpdisp, bfd_byte *p_ldah, |
| 371 | bfd_byte *p_lda) |
| 372 | { |
| 373 | bfd_reloc_status_type ret = bfd_reloc_ok; |
| 374 | bfd_vma addend; |
| 375 | unsigned long i_ldah, i_lda; |
| 376 | |
| 377 | i_ldah = bfd_get_32 (abfd, p_ldah); |
| 378 | i_lda = bfd_get_32 (abfd, p_lda); |
| 379 | |
| 380 | /* Complain if the instructions are not correct. */ |
| 381 | if (((i_ldah >> 26) & 0x3f) != 0x09 |
| 382 | || ((i_lda >> 26) & 0x3f) != 0x08) |
| 383 | ret = bfd_reloc_dangerous; |
| 384 | |
| 385 | /* Extract the user-supplied offset, mirroring the sign extensions |
| 386 | that the instructions perform. */ |
| 387 | addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff); |
| 388 | addend = (addend ^ 0x80008000) - 0x80008000; |
| 389 | |
| 390 | gpdisp += addend; |
| 391 | |
| 392 | if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000 |
| 393 | || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000) |
| 394 | ret = bfd_reloc_overflow; |
| 395 | |
| 396 | /* compensate for the sign extension again. */ |
| 397 | i_ldah = ((i_ldah & 0xffff0000) |
| 398 | | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff)); |
| 399 | i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff); |
| 400 | |
| 401 | bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah); |
| 402 | bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda); |
| 403 | |
| 404 | return ret; |
| 405 | } |
| 406 | |
| 407 | /* The special function for the GPDISP reloc. */ |
| 408 | |
| 409 | static bfd_reloc_status_type |
| 410 | elf64_alpha_reloc_gpdisp (bfd *abfd, arelent *reloc_entry, |
| 411 | asymbol *sym ATTRIBUTE_UNUSED, PTR data, |
| 412 | asection *input_section, bfd *output_bfd, |
| 413 | char **err_msg) |
| 414 | { |
| 415 | bfd_reloc_status_type ret; |
| 416 | bfd_vma gp, relocation; |
| 417 | bfd_vma high_address; |
| 418 | bfd_byte *p_ldah, *p_lda; |
| 419 | |
| 420 | /* Don't do anything if we're not doing a final link. */ |
| 421 | if (output_bfd) |
| 422 | { |
| 423 | reloc_entry->address += input_section->output_offset; |
| 424 | return bfd_reloc_ok; |
| 425 | } |
| 426 | |
| 427 | high_address = bfd_get_section_limit (abfd, input_section); |
| 428 | if (reloc_entry->address > high_address |
| 429 | || reloc_entry->address + reloc_entry->addend > high_address) |
| 430 | return bfd_reloc_outofrange; |
| 431 | |
| 432 | /* The gp used in the portion of the output object to which this |
| 433 | input object belongs is cached on the input bfd. */ |
| 434 | gp = _bfd_get_gp_value (abfd); |
| 435 | |
| 436 | relocation = (input_section->output_section->vma |
| 437 | + input_section->output_offset |
| 438 | + reloc_entry->address); |
| 439 | |
| 440 | p_ldah = (bfd_byte *) data + reloc_entry->address; |
| 441 | p_lda = p_ldah + reloc_entry->addend; |
| 442 | |
| 443 | ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda); |
| 444 | |
| 445 | /* Complain if the instructions are not correct. */ |
| 446 | if (ret == bfd_reloc_dangerous) |
| 447 | *err_msg = _("GPDISP relocation did not find ldah and lda instructions"); |
| 448 | |
| 449 | return ret; |
| 450 | } |
| 451 | |
| 452 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
| 453 | from smaller values. Start with zero, widen, *then* decrement. */ |
| 454 | #define MINUS_ONE (((bfd_vma)0) - 1) |
| 455 | |
| 456 | #define SKIP_HOWTO(N) \ |
| 457 | HOWTO(N, 0, 0, 0, 0, 0, 0, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0) |
| 458 | |
| 459 | static reloc_howto_type elf64_alpha_howto_table[] = |
| 460 | { |
| 461 | HOWTO (R_ALPHA_NONE, /* type */ |
| 462 | 0, /* rightshift */ |
| 463 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 464 | 8, /* bitsize */ |
| 465 | TRUE, /* pc_relative */ |
| 466 | 0, /* bitpos */ |
| 467 | complain_overflow_dont, /* complain_on_overflow */ |
| 468 | elf64_alpha_reloc_nil, /* special_function */ |
| 469 | "NONE", /* name */ |
| 470 | FALSE, /* partial_inplace */ |
| 471 | 0, /* src_mask */ |
| 472 | 0, /* dst_mask */ |
| 473 | TRUE), /* pcrel_offset */ |
| 474 | |
| 475 | /* A 32 bit reference to a symbol. */ |
| 476 | HOWTO (R_ALPHA_REFLONG, /* type */ |
| 477 | 0, /* rightshift */ |
| 478 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 479 | 32, /* bitsize */ |
| 480 | FALSE, /* pc_relative */ |
| 481 | 0, /* bitpos */ |
| 482 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 483 | 0, /* special_function */ |
| 484 | "REFLONG", /* name */ |
| 485 | FALSE, /* partial_inplace */ |
| 486 | 0xffffffff, /* src_mask */ |
| 487 | 0xffffffff, /* dst_mask */ |
| 488 | FALSE), /* pcrel_offset */ |
| 489 | |
| 490 | /* A 64 bit reference to a symbol. */ |
| 491 | HOWTO (R_ALPHA_REFQUAD, /* type */ |
| 492 | 0, /* rightshift */ |
| 493 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 494 | 64, /* bitsize */ |
| 495 | FALSE, /* pc_relative */ |
| 496 | 0, /* bitpos */ |
| 497 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 498 | 0, /* special_function */ |
| 499 | "REFQUAD", /* name */ |
| 500 | FALSE, /* partial_inplace */ |
| 501 | MINUS_ONE, /* src_mask */ |
| 502 | MINUS_ONE, /* dst_mask */ |
| 503 | FALSE), /* pcrel_offset */ |
| 504 | |
| 505 | /* A 32 bit GP relative offset. This is just like REFLONG except |
| 506 | that when the value is used the value of the gp register will be |
| 507 | added in. */ |
| 508 | HOWTO (R_ALPHA_GPREL32, /* type */ |
| 509 | 0, /* rightshift */ |
| 510 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 511 | 32, /* bitsize */ |
| 512 | FALSE, /* pc_relative */ |
| 513 | 0, /* bitpos */ |
| 514 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 515 | 0, /* special_function */ |
| 516 | "GPREL32", /* name */ |
| 517 | FALSE, /* partial_inplace */ |
| 518 | 0xffffffff, /* src_mask */ |
| 519 | 0xffffffff, /* dst_mask */ |
| 520 | FALSE), /* pcrel_offset */ |
| 521 | |
| 522 | /* Used for an instruction that refers to memory off the GP register. */ |
| 523 | HOWTO (R_ALPHA_LITERAL, /* type */ |
| 524 | 0, /* rightshift */ |
| 525 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 526 | 16, /* bitsize */ |
| 527 | FALSE, /* pc_relative */ |
| 528 | 0, /* bitpos */ |
| 529 | complain_overflow_signed, /* complain_on_overflow */ |
| 530 | 0, /* special_function */ |
| 531 | "ELF_LITERAL", /* name */ |
| 532 | FALSE, /* partial_inplace */ |
| 533 | 0xffff, /* src_mask */ |
| 534 | 0xffff, /* dst_mask */ |
| 535 | FALSE), /* pcrel_offset */ |
| 536 | |
| 537 | /* This reloc only appears immediately following an ELF_LITERAL reloc. |
| 538 | It identifies a use of the literal. The symbol index is special: |
| 539 | 1 means the literal address is in the base register of a memory |
| 540 | format instruction; 2 means the literal address is in the byte |
| 541 | offset register of a byte-manipulation instruction; 3 means the |
| 542 | literal address is in the target register of a jsr instruction. |
| 543 | This does not actually do any relocation. */ |
| 544 | HOWTO (R_ALPHA_LITUSE, /* type */ |
| 545 | 0, /* rightshift */ |
| 546 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 547 | 32, /* bitsize */ |
| 548 | FALSE, /* pc_relative */ |
| 549 | 0, /* bitpos */ |
| 550 | complain_overflow_dont, /* complain_on_overflow */ |
| 551 | elf64_alpha_reloc_nil, /* special_function */ |
| 552 | "LITUSE", /* name */ |
| 553 | FALSE, /* partial_inplace */ |
| 554 | 0, /* src_mask */ |
| 555 | 0, /* dst_mask */ |
| 556 | FALSE), /* pcrel_offset */ |
| 557 | |
| 558 | /* Load the gp register. This is always used for a ldah instruction |
| 559 | which loads the upper 16 bits of the gp register. The symbol |
| 560 | index of the GPDISP instruction is an offset in bytes to the lda |
| 561 | instruction that loads the lower 16 bits. The value to use for |
| 562 | the relocation is the difference between the GP value and the |
| 563 | current location; the load will always be done against a register |
| 564 | holding the current address. |
| 565 | |
| 566 | NOTE: Unlike ECOFF, partial in-place relocation is not done. If |
| 567 | any offset is present in the instructions, it is an offset from |
| 568 | the register to the ldah instruction. This lets us avoid any |
| 569 | stupid hackery like inventing a gp value to do partial relocation |
| 570 | against. Also unlike ECOFF, we do the whole relocation off of |
| 571 | the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd, |
| 572 | space consuming bit, that, since all the information was present |
| 573 | in the GPDISP_HI16 reloc. */ |
| 574 | HOWTO (R_ALPHA_GPDISP, /* type */ |
| 575 | 16, /* rightshift */ |
| 576 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 577 | 16, /* bitsize */ |
| 578 | FALSE, /* pc_relative */ |
| 579 | 0, /* bitpos */ |
| 580 | complain_overflow_dont, /* complain_on_overflow */ |
| 581 | elf64_alpha_reloc_gpdisp, /* special_function */ |
| 582 | "GPDISP", /* name */ |
| 583 | FALSE, /* partial_inplace */ |
| 584 | 0xffff, /* src_mask */ |
| 585 | 0xffff, /* dst_mask */ |
| 586 | TRUE), /* pcrel_offset */ |
| 587 | |
| 588 | /* A 21 bit branch. */ |
| 589 | HOWTO (R_ALPHA_BRADDR, /* type */ |
| 590 | 2, /* rightshift */ |
| 591 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 592 | 21, /* bitsize */ |
| 593 | TRUE, /* pc_relative */ |
| 594 | 0, /* bitpos */ |
| 595 | complain_overflow_signed, /* complain_on_overflow */ |
| 596 | 0, /* special_function */ |
| 597 | "BRADDR", /* name */ |
| 598 | FALSE, /* partial_inplace */ |
| 599 | 0x1fffff, /* src_mask */ |
| 600 | 0x1fffff, /* dst_mask */ |
| 601 | TRUE), /* pcrel_offset */ |
| 602 | |
| 603 | /* A hint for a jump to a register. */ |
| 604 | HOWTO (R_ALPHA_HINT, /* type */ |
| 605 | 2, /* rightshift */ |
| 606 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 607 | 14, /* bitsize */ |
| 608 | TRUE, /* pc_relative */ |
| 609 | 0, /* bitpos */ |
| 610 | complain_overflow_dont, /* complain_on_overflow */ |
| 611 | 0, /* special_function */ |
| 612 | "HINT", /* name */ |
| 613 | FALSE, /* partial_inplace */ |
| 614 | 0x3fff, /* src_mask */ |
| 615 | 0x3fff, /* dst_mask */ |
| 616 | TRUE), /* pcrel_offset */ |
| 617 | |
| 618 | /* 16 bit PC relative offset. */ |
| 619 | HOWTO (R_ALPHA_SREL16, /* type */ |
| 620 | 0, /* rightshift */ |
| 621 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 622 | 16, /* bitsize */ |
| 623 | TRUE, /* pc_relative */ |
| 624 | 0, /* bitpos */ |
| 625 | complain_overflow_signed, /* complain_on_overflow */ |
| 626 | 0, /* special_function */ |
| 627 | "SREL16", /* name */ |
| 628 | FALSE, /* partial_inplace */ |
| 629 | 0xffff, /* src_mask */ |
| 630 | 0xffff, /* dst_mask */ |
| 631 | TRUE), /* pcrel_offset */ |
| 632 | |
| 633 | /* 32 bit PC relative offset. */ |
| 634 | HOWTO (R_ALPHA_SREL32, /* type */ |
| 635 | 0, /* rightshift */ |
| 636 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 637 | 32, /* bitsize */ |
| 638 | TRUE, /* pc_relative */ |
| 639 | 0, /* bitpos */ |
| 640 | complain_overflow_signed, /* complain_on_overflow */ |
| 641 | 0, /* special_function */ |
| 642 | "SREL32", /* name */ |
| 643 | FALSE, /* partial_inplace */ |
| 644 | 0xffffffff, /* src_mask */ |
| 645 | 0xffffffff, /* dst_mask */ |
| 646 | TRUE), /* pcrel_offset */ |
| 647 | |
| 648 | /* A 64 bit PC relative offset. */ |
| 649 | HOWTO (R_ALPHA_SREL64, /* type */ |
| 650 | 0, /* rightshift */ |
| 651 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 652 | 64, /* bitsize */ |
| 653 | TRUE, /* pc_relative */ |
| 654 | 0, /* bitpos */ |
| 655 | complain_overflow_signed, /* complain_on_overflow */ |
| 656 | 0, /* special_function */ |
| 657 | "SREL64", /* name */ |
| 658 | FALSE, /* partial_inplace */ |
| 659 | MINUS_ONE, /* src_mask */ |
| 660 | MINUS_ONE, /* dst_mask */ |
| 661 | TRUE), /* pcrel_offset */ |
| 662 | |
| 663 | /* Skip 12 - 16; deprecated ECOFF relocs. */ |
| 664 | SKIP_HOWTO (12), |
| 665 | SKIP_HOWTO (13), |
| 666 | SKIP_HOWTO (14), |
| 667 | SKIP_HOWTO (15), |
| 668 | SKIP_HOWTO (16), |
| 669 | |
| 670 | /* The high 16 bits of the displacement from GP to the target. */ |
| 671 | HOWTO (R_ALPHA_GPRELHIGH, |
| 672 | 0, /* rightshift */ |
| 673 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 674 | 16, /* bitsize */ |
| 675 | FALSE, /* pc_relative */ |
| 676 | 0, /* bitpos */ |
| 677 | complain_overflow_signed, /* complain_on_overflow */ |
| 678 | 0, /* special_function */ |
| 679 | "GPRELHIGH", /* name */ |
| 680 | FALSE, /* partial_inplace */ |
| 681 | 0xffff, /* src_mask */ |
| 682 | 0xffff, /* dst_mask */ |
| 683 | FALSE), /* pcrel_offset */ |
| 684 | |
| 685 | /* The low 16 bits of the displacement from GP to the target. */ |
| 686 | HOWTO (R_ALPHA_GPRELLOW, |
| 687 | 0, /* rightshift */ |
| 688 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 689 | 16, /* bitsize */ |
| 690 | FALSE, /* pc_relative */ |
| 691 | 0, /* bitpos */ |
| 692 | complain_overflow_dont, /* complain_on_overflow */ |
| 693 | 0, /* special_function */ |
| 694 | "GPRELLOW", /* name */ |
| 695 | FALSE, /* partial_inplace */ |
| 696 | 0xffff, /* src_mask */ |
| 697 | 0xffff, /* dst_mask */ |
| 698 | FALSE), /* pcrel_offset */ |
| 699 | |
| 700 | /* A 16-bit displacement from the GP to the target. */ |
| 701 | HOWTO (R_ALPHA_GPREL16, |
| 702 | 0, /* rightshift */ |
| 703 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 704 | 16, /* bitsize */ |
| 705 | FALSE, /* pc_relative */ |
| 706 | 0, /* bitpos */ |
| 707 | complain_overflow_signed, /* complain_on_overflow */ |
| 708 | 0, /* special_function */ |
| 709 | "GPREL16", /* name */ |
| 710 | FALSE, /* partial_inplace */ |
| 711 | 0xffff, /* src_mask */ |
| 712 | 0xffff, /* dst_mask */ |
| 713 | FALSE), /* pcrel_offset */ |
| 714 | |
| 715 | /* Skip 20 - 23; deprecated ECOFF relocs. */ |
| 716 | SKIP_HOWTO (20), |
| 717 | SKIP_HOWTO (21), |
| 718 | SKIP_HOWTO (22), |
| 719 | SKIP_HOWTO (23), |
| 720 | |
| 721 | /* Misc ELF relocations. */ |
| 722 | |
| 723 | /* A dynamic relocation to copy the target into our .dynbss section. */ |
| 724 | /* Not generated, as all Alpha objects use PIC, so it is not needed. It |
| 725 | is present because every other ELF has one, but should not be used |
| 726 | because .dynbss is an ugly thing. */ |
| 727 | HOWTO (R_ALPHA_COPY, |
| 728 | 0, |
| 729 | 0, |
| 730 | 0, |
| 731 | FALSE, |
| 732 | 0, |
| 733 | complain_overflow_dont, |
| 734 | bfd_elf_generic_reloc, |
| 735 | "COPY", |
| 736 | FALSE, |
| 737 | 0, |
| 738 | 0, |
| 739 | TRUE), |
| 740 | |
| 741 | /* A dynamic relocation for a .got entry. */ |
| 742 | HOWTO (R_ALPHA_GLOB_DAT, |
| 743 | 0, |
| 744 | 0, |
| 745 | 0, |
| 746 | FALSE, |
| 747 | 0, |
| 748 | complain_overflow_dont, |
| 749 | bfd_elf_generic_reloc, |
| 750 | "GLOB_DAT", |
| 751 | FALSE, |
| 752 | 0, |
| 753 | 0, |
| 754 | TRUE), |
| 755 | |
| 756 | /* A dynamic relocation for a .plt entry. */ |
| 757 | HOWTO (R_ALPHA_JMP_SLOT, |
| 758 | 0, |
| 759 | 0, |
| 760 | 0, |
| 761 | FALSE, |
| 762 | 0, |
| 763 | complain_overflow_dont, |
| 764 | bfd_elf_generic_reloc, |
| 765 | "JMP_SLOT", |
| 766 | FALSE, |
| 767 | 0, |
| 768 | 0, |
| 769 | TRUE), |
| 770 | |
| 771 | /* A dynamic relocation to add the base of the DSO to a 64-bit field. */ |
| 772 | HOWTO (R_ALPHA_RELATIVE, |
| 773 | 0, |
| 774 | 0, |
| 775 | 0, |
| 776 | FALSE, |
| 777 | 0, |
| 778 | complain_overflow_dont, |
| 779 | bfd_elf_generic_reloc, |
| 780 | "RELATIVE", |
| 781 | FALSE, |
| 782 | 0, |
| 783 | 0, |
| 784 | TRUE), |
| 785 | |
| 786 | /* A 21 bit branch that adjusts for gp loads. */ |
| 787 | HOWTO (R_ALPHA_BRSGP, /* type */ |
| 788 | 2, /* rightshift */ |
| 789 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 790 | 21, /* bitsize */ |
| 791 | TRUE, /* pc_relative */ |
| 792 | 0, /* bitpos */ |
| 793 | complain_overflow_signed, /* complain_on_overflow */ |
| 794 | 0, /* special_function */ |
| 795 | "BRSGP", /* name */ |
| 796 | FALSE, /* partial_inplace */ |
| 797 | 0x1fffff, /* src_mask */ |
| 798 | 0x1fffff, /* dst_mask */ |
| 799 | TRUE), /* pcrel_offset */ |
| 800 | |
| 801 | /* Creates a tls_index for the symbol in the got. */ |
| 802 | HOWTO (R_ALPHA_TLSGD, /* type */ |
| 803 | 0, /* rightshift */ |
| 804 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 805 | 16, /* bitsize */ |
| 806 | FALSE, /* pc_relative */ |
| 807 | 0, /* bitpos */ |
| 808 | complain_overflow_signed, /* complain_on_overflow */ |
| 809 | 0, /* special_function */ |
| 810 | "TLSGD", /* name */ |
| 811 | FALSE, /* partial_inplace */ |
| 812 | 0xffff, /* src_mask */ |
| 813 | 0xffff, /* dst_mask */ |
| 814 | FALSE), /* pcrel_offset */ |
| 815 | |
| 816 | /* Creates a tls_index for the (current) module in the got. */ |
| 817 | HOWTO (R_ALPHA_TLSLDM, /* type */ |
| 818 | 0, /* rightshift */ |
| 819 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 820 | 16, /* bitsize */ |
| 821 | FALSE, /* pc_relative */ |
| 822 | 0, /* bitpos */ |
| 823 | complain_overflow_signed, /* complain_on_overflow */ |
| 824 | 0, /* special_function */ |
| 825 | "TLSLDM", /* name */ |
| 826 | FALSE, /* partial_inplace */ |
| 827 | 0xffff, /* src_mask */ |
| 828 | 0xffff, /* dst_mask */ |
| 829 | FALSE), /* pcrel_offset */ |
| 830 | |
| 831 | /* A dynamic relocation for a DTP module entry. */ |
| 832 | HOWTO (R_ALPHA_DTPMOD64, /* type */ |
| 833 | 0, /* rightshift */ |
| 834 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 835 | 64, /* bitsize */ |
| 836 | FALSE, /* pc_relative */ |
| 837 | 0, /* bitpos */ |
| 838 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 839 | 0, /* special_function */ |
| 840 | "DTPMOD64", /* name */ |
| 841 | FALSE, /* partial_inplace */ |
| 842 | MINUS_ONE, /* src_mask */ |
| 843 | MINUS_ONE, /* dst_mask */ |
| 844 | FALSE), /* pcrel_offset */ |
| 845 | |
| 846 | /* Creates a 64-bit offset in the got for the displacement |
| 847 | from DTP to the target. */ |
| 848 | HOWTO (R_ALPHA_GOTDTPREL, /* type */ |
| 849 | 0, /* rightshift */ |
| 850 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 851 | 16, /* bitsize */ |
| 852 | FALSE, /* pc_relative */ |
| 853 | 0, /* bitpos */ |
| 854 | complain_overflow_signed, /* complain_on_overflow */ |
| 855 | 0, /* special_function */ |
| 856 | "GOTDTPREL", /* name */ |
| 857 | FALSE, /* partial_inplace */ |
| 858 | 0xffff, /* src_mask */ |
| 859 | 0xffff, /* dst_mask */ |
| 860 | FALSE), /* pcrel_offset */ |
| 861 | |
| 862 | /* A dynamic relocation for a displacement from DTP to the target. */ |
| 863 | HOWTO (R_ALPHA_DTPREL64, /* type */ |
| 864 | 0, /* rightshift */ |
| 865 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 866 | 64, /* bitsize */ |
| 867 | FALSE, /* pc_relative */ |
| 868 | 0, /* bitpos */ |
| 869 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 870 | 0, /* special_function */ |
| 871 | "DTPREL64", /* name */ |
| 872 | FALSE, /* partial_inplace */ |
| 873 | MINUS_ONE, /* src_mask */ |
| 874 | MINUS_ONE, /* dst_mask */ |
| 875 | FALSE), /* pcrel_offset */ |
| 876 | |
| 877 | /* The high 16 bits of the displacement from DTP to the target. */ |
| 878 | HOWTO (R_ALPHA_DTPRELHI, /* type */ |
| 879 | 0, /* rightshift */ |
| 880 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 881 | 16, /* bitsize */ |
| 882 | FALSE, /* pc_relative */ |
| 883 | 0, /* bitpos */ |
| 884 | complain_overflow_signed, /* complain_on_overflow */ |
| 885 | 0, /* special_function */ |
| 886 | "DTPRELHI", /* name */ |
| 887 | FALSE, /* partial_inplace */ |
| 888 | 0xffff, /* src_mask */ |
| 889 | 0xffff, /* dst_mask */ |
| 890 | FALSE), /* pcrel_offset */ |
| 891 | |
| 892 | /* The low 16 bits of the displacement from DTP to the target. */ |
| 893 | HOWTO (R_ALPHA_DTPRELLO, /* type */ |
| 894 | 0, /* rightshift */ |
| 895 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 896 | 16, /* bitsize */ |
| 897 | FALSE, /* pc_relative */ |
| 898 | 0, /* bitpos */ |
| 899 | complain_overflow_dont, /* complain_on_overflow */ |
| 900 | 0, /* special_function */ |
| 901 | "DTPRELLO", /* name */ |
| 902 | FALSE, /* partial_inplace */ |
| 903 | 0xffff, /* src_mask */ |
| 904 | 0xffff, /* dst_mask */ |
| 905 | FALSE), /* pcrel_offset */ |
| 906 | |
| 907 | /* A 16-bit displacement from DTP to the target. */ |
| 908 | HOWTO (R_ALPHA_DTPREL16, /* type */ |
| 909 | 0, /* rightshift */ |
| 910 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 911 | 16, /* bitsize */ |
| 912 | FALSE, /* pc_relative */ |
| 913 | 0, /* bitpos */ |
| 914 | complain_overflow_signed, /* complain_on_overflow */ |
| 915 | 0, /* special_function */ |
| 916 | "DTPREL16", /* name */ |
| 917 | FALSE, /* partial_inplace */ |
| 918 | 0xffff, /* src_mask */ |
| 919 | 0xffff, /* dst_mask */ |
| 920 | FALSE), /* pcrel_offset */ |
| 921 | |
| 922 | /* Creates a 64-bit offset in the got for the displacement |
| 923 | from TP to the target. */ |
| 924 | HOWTO (R_ALPHA_GOTTPREL, /* type */ |
| 925 | 0, /* rightshift */ |
| 926 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 927 | 16, /* bitsize */ |
| 928 | FALSE, /* pc_relative */ |
| 929 | 0, /* bitpos */ |
| 930 | complain_overflow_signed, /* complain_on_overflow */ |
| 931 | 0, /* special_function */ |
| 932 | "GOTTPREL", /* name */ |
| 933 | FALSE, /* partial_inplace */ |
| 934 | 0xffff, /* src_mask */ |
| 935 | 0xffff, /* dst_mask */ |
| 936 | FALSE), /* pcrel_offset */ |
| 937 | |
| 938 | /* A dynamic relocation for a displacement from TP to the target. */ |
| 939 | HOWTO (R_ALPHA_TPREL64, /* type */ |
| 940 | 0, /* rightshift */ |
| 941 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 942 | 64, /* bitsize */ |
| 943 | FALSE, /* pc_relative */ |
| 944 | 0, /* bitpos */ |
| 945 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 946 | 0, /* special_function */ |
| 947 | "TPREL64", /* name */ |
| 948 | FALSE, /* partial_inplace */ |
| 949 | MINUS_ONE, /* src_mask */ |
| 950 | MINUS_ONE, /* dst_mask */ |
| 951 | FALSE), /* pcrel_offset */ |
| 952 | |
| 953 | /* The high 16 bits of the displacement from TP to the target. */ |
| 954 | HOWTO (R_ALPHA_TPRELHI, /* type */ |
| 955 | 0, /* rightshift */ |
| 956 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 957 | 16, /* bitsize */ |
| 958 | FALSE, /* pc_relative */ |
| 959 | 0, /* bitpos */ |
| 960 | complain_overflow_signed, /* complain_on_overflow */ |
| 961 | 0, /* special_function */ |
| 962 | "TPRELHI", /* name */ |
| 963 | FALSE, /* partial_inplace */ |
| 964 | 0xffff, /* src_mask */ |
| 965 | 0xffff, /* dst_mask */ |
| 966 | FALSE), /* pcrel_offset */ |
| 967 | |
| 968 | /* The low 16 bits of the displacement from TP to the target. */ |
| 969 | HOWTO (R_ALPHA_TPRELLO, /* type */ |
| 970 | 0, /* rightshift */ |
| 971 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 972 | 16, /* bitsize */ |
| 973 | FALSE, /* pc_relative */ |
| 974 | 0, /* bitpos */ |
| 975 | complain_overflow_dont, /* complain_on_overflow */ |
| 976 | 0, /* special_function */ |
| 977 | "TPRELLO", /* name */ |
| 978 | FALSE, /* partial_inplace */ |
| 979 | 0xffff, /* src_mask */ |
| 980 | 0xffff, /* dst_mask */ |
| 981 | FALSE), /* pcrel_offset */ |
| 982 | |
| 983 | /* A 16-bit displacement from TP to the target. */ |
| 984 | HOWTO (R_ALPHA_TPREL16, /* type */ |
| 985 | 0, /* rightshift */ |
| 986 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 987 | 16, /* bitsize */ |
| 988 | FALSE, /* pc_relative */ |
| 989 | 0, /* bitpos */ |
| 990 | complain_overflow_signed, /* complain_on_overflow */ |
| 991 | 0, /* special_function */ |
| 992 | "TPREL16", /* name */ |
| 993 | FALSE, /* partial_inplace */ |
| 994 | 0xffff, /* src_mask */ |
| 995 | 0xffff, /* dst_mask */ |
| 996 | FALSE), /* pcrel_offset */ |
| 997 | }; |
| 998 | |
| 999 | /* A mapping from BFD reloc types to Alpha ELF reloc types. */ |
| 1000 | |
| 1001 | struct elf_reloc_map |
| 1002 | { |
| 1003 | bfd_reloc_code_real_type bfd_reloc_val; |
| 1004 | int elf_reloc_val; |
| 1005 | }; |
| 1006 | |
| 1007 | static const struct elf_reloc_map elf64_alpha_reloc_map[] = |
| 1008 | { |
| 1009 | {BFD_RELOC_NONE, R_ALPHA_NONE}, |
| 1010 | {BFD_RELOC_32, R_ALPHA_REFLONG}, |
| 1011 | {BFD_RELOC_64, R_ALPHA_REFQUAD}, |
| 1012 | {BFD_RELOC_CTOR, R_ALPHA_REFQUAD}, |
| 1013 | {BFD_RELOC_GPREL32, R_ALPHA_GPREL32}, |
| 1014 | {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL}, |
| 1015 | {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE}, |
| 1016 | {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP}, |
| 1017 | {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR}, |
| 1018 | {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT}, |
| 1019 | {BFD_RELOC_16_PCREL, R_ALPHA_SREL16}, |
| 1020 | {BFD_RELOC_32_PCREL, R_ALPHA_SREL32}, |
| 1021 | {BFD_RELOC_64_PCREL, R_ALPHA_SREL64}, |
| 1022 | {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH}, |
| 1023 | {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW}, |
| 1024 | {BFD_RELOC_GPREL16, R_ALPHA_GPREL16}, |
| 1025 | {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP}, |
| 1026 | {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD}, |
| 1027 | {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM}, |
| 1028 | {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64}, |
| 1029 | {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL}, |
| 1030 | {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64}, |
| 1031 | {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI}, |
| 1032 | {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO}, |
| 1033 | {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16}, |
| 1034 | {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL}, |
| 1035 | {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64}, |
| 1036 | {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI}, |
| 1037 | {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO}, |
| 1038 | {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16}, |
| 1039 | }; |
| 1040 | |
| 1041 | /* Given a BFD reloc type, return a HOWTO structure. */ |
| 1042 | |
| 1043 | static reloc_howto_type * |
| 1044 | elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1045 | bfd_reloc_code_real_type code) |
| 1046 | { |
| 1047 | const struct elf_reloc_map *i, *e; |
| 1048 | i = e = elf64_alpha_reloc_map; |
| 1049 | e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map); |
| 1050 | for (; i != e; ++i) |
| 1051 | { |
| 1052 | if (i->bfd_reloc_val == code) |
| 1053 | return &elf64_alpha_howto_table[i->elf_reloc_val]; |
| 1054 | } |
| 1055 | return 0; |
| 1056 | } |
| 1057 | |
| 1058 | /* Given an Alpha ELF reloc type, fill in an arelent structure. */ |
| 1059 | |
| 1060 | static void |
| 1061 | elf64_alpha_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
| 1062 | Elf_Internal_Rela *dst) |
| 1063 | { |
| 1064 | unsigned r_type = ELF64_R_TYPE(dst->r_info); |
| 1065 | BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max); |
| 1066 | cache_ptr->howto = &elf64_alpha_howto_table[r_type]; |
| 1067 | } |
| 1068 | |
| 1069 | /* These two relocations create a two-word entry in the got. */ |
| 1070 | #define alpha_got_entry_size(r_type) \ |
| 1071 | (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8) |
| 1072 | |
| 1073 | /* This is PT_TLS segment p_vaddr. */ |
| 1074 | #define alpha_get_dtprel_base(info) \ |
| 1075 | (elf_hash_table (info)->tls_sec->vma) |
| 1076 | |
| 1077 | /* Main program TLS (whose template starts at PT_TLS p_vaddr) |
| 1078 | is assigned offset round(16, PT_TLS p_align). */ |
| 1079 | #define alpha_get_tprel_base(info) \ |
| 1080 | (elf_hash_table (info)->tls_sec->vma \ |
| 1081 | - align_power ((bfd_vma) 16, \ |
| 1082 | elf_hash_table (info)->tls_sec->alignment_power)) |
| 1083 | \f |
| 1084 | /* Handle an Alpha specific section when reading an object file. This |
| 1085 | is called when bfd_section_from_shdr finds a section with an unknown |
| 1086 | type. |
| 1087 | FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure |
| 1088 | how to. */ |
| 1089 | |
| 1090 | static bfd_boolean |
| 1091 | elf64_alpha_section_from_shdr (bfd *abfd, |
| 1092 | Elf_Internal_Shdr *hdr, |
| 1093 | const char *name, |
| 1094 | int shindex) |
| 1095 | { |
| 1096 | asection *newsect; |
| 1097 | |
| 1098 | /* There ought to be a place to keep ELF backend specific flags, but |
| 1099 | at the moment there isn't one. We just keep track of the |
| 1100 | sections by their name, instead. Fortunately, the ABI gives |
| 1101 | suggested names for all the MIPS specific sections, so we will |
| 1102 | probably get away with this. */ |
| 1103 | switch (hdr->sh_type) |
| 1104 | { |
| 1105 | case SHT_ALPHA_DEBUG: |
| 1106 | if (strcmp (name, ".mdebug") != 0) |
| 1107 | return FALSE; |
| 1108 | break; |
| 1109 | default: |
| 1110 | return FALSE; |
| 1111 | } |
| 1112 | |
| 1113 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 1114 | return FALSE; |
| 1115 | newsect = hdr->bfd_section; |
| 1116 | |
| 1117 | if (hdr->sh_type == SHT_ALPHA_DEBUG) |
| 1118 | { |
| 1119 | if (! bfd_set_section_flags (abfd, newsect, |
| 1120 | (bfd_get_section_flags (abfd, newsect) |
| 1121 | | SEC_DEBUGGING))) |
| 1122 | return FALSE; |
| 1123 | } |
| 1124 | |
| 1125 | return TRUE; |
| 1126 | } |
| 1127 | |
| 1128 | /* Convert Alpha specific section flags to bfd internal section flags. */ |
| 1129 | |
| 1130 | static bfd_boolean |
| 1131 | elf64_alpha_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) |
| 1132 | { |
| 1133 | if (hdr->sh_flags & SHF_ALPHA_GPREL) |
| 1134 | *flags |= SEC_SMALL_DATA; |
| 1135 | |
| 1136 | return TRUE; |
| 1137 | } |
| 1138 | |
| 1139 | /* Set the correct type for an Alpha ELF section. We do this by the |
| 1140 | section name, which is a hack, but ought to work. */ |
| 1141 | |
| 1142 | static bfd_boolean |
| 1143 | elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec) |
| 1144 | { |
| 1145 | register const char *name; |
| 1146 | |
| 1147 | name = bfd_get_section_name (abfd, sec); |
| 1148 | |
| 1149 | if (strcmp (name, ".mdebug") == 0) |
| 1150 | { |
| 1151 | hdr->sh_type = SHT_ALPHA_DEBUG; |
| 1152 | /* In a shared object on Irix 5.3, the .mdebug section has an |
| 1153 | entsize of 0. FIXME: Does this matter? */ |
| 1154 | if ((abfd->flags & DYNAMIC) != 0 ) |
| 1155 | hdr->sh_entsize = 0; |
| 1156 | else |
| 1157 | hdr->sh_entsize = 1; |
| 1158 | } |
| 1159 | else if ((sec->flags & SEC_SMALL_DATA) |
| 1160 | || strcmp (name, ".sdata") == 0 |
| 1161 | || strcmp (name, ".sbss") == 0 |
| 1162 | || strcmp (name, ".lit4") == 0 |
| 1163 | || strcmp (name, ".lit8") == 0) |
| 1164 | hdr->sh_flags |= SHF_ALPHA_GPREL; |
| 1165 | |
| 1166 | return TRUE; |
| 1167 | } |
| 1168 | |
| 1169 | /* Hook called by the linker routine which adds symbols from an object |
| 1170 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 1171 | |
| 1172 | static bfd_boolean |
| 1173 | elf64_alpha_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, |
| 1174 | Elf_Internal_Sym *sym, |
| 1175 | const char **namep ATTRIBUTE_UNUSED, |
| 1176 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 1177 | asection **secp, bfd_vma *valp) |
| 1178 | { |
| 1179 | if (sym->st_shndx == SHN_COMMON |
| 1180 | && !info->relocatable |
| 1181 | && sym->st_size <= elf_gp_size (abfd)) |
| 1182 | { |
| 1183 | /* Common symbols less than or equal to -G nn bytes are |
| 1184 | automatically put into .sbss. */ |
| 1185 | |
| 1186 | asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); |
| 1187 | |
| 1188 | if (scomm == NULL) |
| 1189 | { |
| 1190 | scomm = bfd_make_section_with_flags (abfd, ".scommon", |
| 1191 | (SEC_ALLOC |
| 1192 | | SEC_IS_COMMON |
| 1193 | | SEC_LINKER_CREATED)); |
| 1194 | if (scomm == NULL) |
| 1195 | return FALSE; |
| 1196 | } |
| 1197 | |
| 1198 | *secp = scomm; |
| 1199 | *valp = sym->st_size; |
| 1200 | } |
| 1201 | |
| 1202 | return TRUE; |
| 1203 | } |
| 1204 | |
| 1205 | /* Create the .got section. */ |
| 1206 | |
| 1207 | static bfd_boolean |
| 1208 | elf64_alpha_create_got_section (bfd *abfd, |
| 1209 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 1210 | { |
| 1211 | flagword flags; |
| 1212 | asection *s; |
| 1213 | |
| 1214 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 1215 | | SEC_LINKER_CREATED); |
| 1216 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
| 1217 | if (s == NULL |
| 1218 | || !bfd_set_section_alignment (abfd, s, 3)) |
| 1219 | return FALSE; |
| 1220 | |
| 1221 | alpha_elf_tdata (abfd)->got = s; |
| 1222 | |
| 1223 | /* Make sure the object's gotobj is set to itself so that we default |
| 1224 | to every object with its own .got. We'll merge .gots later once |
| 1225 | we've collected each object's info. */ |
| 1226 | alpha_elf_tdata (abfd)->gotobj = abfd; |
| 1227 | |
| 1228 | return TRUE; |
| 1229 | } |
| 1230 | |
| 1231 | /* Create all the dynamic sections. */ |
| 1232 | |
| 1233 | static bfd_boolean |
| 1234 | elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 1235 | { |
| 1236 | asection *s; |
| 1237 | flagword flags; |
| 1238 | struct elf_link_hash_entry *h; |
| 1239 | |
| 1240 | /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */ |
| 1241 | |
| 1242 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 1243 | | SEC_LINKER_CREATED |
| 1244 | | (elf64_alpha_use_secureplt ? SEC_READONLY : 0)); |
| 1245 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", flags); |
| 1246 | if (s == NULL || ! bfd_set_section_alignment (abfd, s, 4)) |
| 1247 | return FALSE; |
| 1248 | |
| 1249 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
| 1250 | .plt section. */ |
| 1251 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
| 1252 | "_PROCEDURE_LINKAGE_TABLE_"); |
| 1253 | elf_hash_table (info)->hplt = h; |
| 1254 | if (h == NULL) |
| 1255 | return FALSE; |
| 1256 | |
| 1257 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 1258 | | SEC_LINKER_CREATED | SEC_READONLY); |
| 1259 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.plt", flags); |
| 1260 | if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3)) |
| 1261 | return FALSE; |
| 1262 | |
| 1263 | if (elf64_alpha_use_secureplt) |
| 1264 | { |
| 1265 | flags = SEC_ALLOC | SEC_LINKER_CREATED; |
| 1266 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
| 1267 | if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3)) |
| 1268 | return FALSE; |
| 1269 | } |
| 1270 | |
| 1271 | /* We may or may not have created a .got section for this object, but |
| 1272 | we definitely havn't done the rest of the work. */ |
| 1273 | |
| 1274 | if (alpha_elf_tdata(abfd)->gotobj == NULL) |
| 1275 | { |
| 1276 | if (!elf64_alpha_create_got_section (abfd, info)) |
| 1277 | return FALSE; |
| 1278 | } |
| 1279 | |
| 1280 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 1281 | | SEC_LINKER_CREATED | SEC_READONLY); |
| 1282 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.got", flags); |
| 1283 | if (s == NULL |
| 1284 | || !bfd_set_section_alignment (abfd, s, 3)) |
| 1285 | return FALSE; |
| 1286 | |
| 1287 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the |
| 1288 | dynobj's .got section. We don't do this in the linker script |
| 1289 | because we don't want to define the symbol if we are not creating |
| 1290 | a global offset table. */ |
| 1291 | h = _bfd_elf_define_linkage_sym (abfd, info, alpha_elf_tdata(abfd)->got, |
| 1292 | "_GLOBAL_OFFSET_TABLE_"); |
| 1293 | elf_hash_table (info)->hgot = h; |
| 1294 | if (h == NULL) |
| 1295 | return FALSE; |
| 1296 | |
| 1297 | return TRUE; |
| 1298 | } |
| 1299 | \f |
| 1300 | /* Read ECOFF debugging information from a .mdebug section into a |
| 1301 | ecoff_debug_info structure. */ |
| 1302 | |
| 1303 | static bfd_boolean |
| 1304 | elf64_alpha_read_ecoff_info (bfd *abfd, asection *section, |
| 1305 | struct ecoff_debug_info *debug) |
| 1306 | { |
| 1307 | HDRR *symhdr; |
| 1308 | const struct ecoff_debug_swap *swap; |
| 1309 | char *ext_hdr = NULL; |
| 1310 | |
| 1311 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 1312 | memset (debug, 0, sizeof (*debug)); |
| 1313 | |
| 1314 | ext_hdr = (char *) bfd_malloc (swap->external_hdr_size); |
| 1315 | if (ext_hdr == NULL && swap->external_hdr_size != 0) |
| 1316 | goto error_return; |
| 1317 | |
| 1318 | if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, |
| 1319 | swap->external_hdr_size)) |
| 1320 | goto error_return; |
| 1321 | |
| 1322 | symhdr = &debug->symbolic_header; |
| 1323 | (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); |
| 1324 | |
| 1325 | /* The symbolic header contains absolute file offsets and sizes to |
| 1326 | read. */ |
| 1327 | #define READ(ptr, offset, count, size, type) \ |
| 1328 | if (symhdr->count == 0) \ |
| 1329 | debug->ptr = NULL; \ |
| 1330 | else \ |
| 1331 | { \ |
| 1332 | bfd_size_type amt = (bfd_size_type) size * symhdr->count; \ |
| 1333 | debug->ptr = (type) bfd_malloc (amt); \ |
| 1334 | if (debug->ptr == NULL) \ |
| 1335 | goto error_return; \ |
| 1336 | if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ |
| 1337 | || bfd_bread (debug->ptr, amt, abfd) != amt) \ |
| 1338 | goto error_return; \ |
| 1339 | } |
| 1340 | |
| 1341 | READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); |
| 1342 | READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR); |
| 1343 | READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR); |
| 1344 | READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR); |
| 1345 | READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR); |
| 1346 | READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), |
| 1347 | union aux_ext *); |
| 1348 | READ (ss, cbSsOffset, issMax, sizeof (char), char *); |
| 1349 | READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); |
| 1350 | READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR); |
| 1351 | READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR); |
| 1352 | READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR); |
| 1353 | #undef READ |
| 1354 | |
| 1355 | debug->fdr = NULL; |
| 1356 | |
| 1357 | return TRUE; |
| 1358 | |
| 1359 | error_return: |
| 1360 | if (ext_hdr != NULL) |
| 1361 | free (ext_hdr); |
| 1362 | if (debug->line != NULL) |
| 1363 | free (debug->line); |
| 1364 | if (debug->external_dnr != NULL) |
| 1365 | free (debug->external_dnr); |
| 1366 | if (debug->external_pdr != NULL) |
| 1367 | free (debug->external_pdr); |
| 1368 | if (debug->external_sym != NULL) |
| 1369 | free (debug->external_sym); |
| 1370 | if (debug->external_opt != NULL) |
| 1371 | free (debug->external_opt); |
| 1372 | if (debug->external_aux != NULL) |
| 1373 | free (debug->external_aux); |
| 1374 | if (debug->ss != NULL) |
| 1375 | free (debug->ss); |
| 1376 | if (debug->ssext != NULL) |
| 1377 | free (debug->ssext); |
| 1378 | if (debug->external_fdr != NULL) |
| 1379 | free (debug->external_fdr); |
| 1380 | if (debug->external_rfd != NULL) |
| 1381 | free (debug->external_rfd); |
| 1382 | if (debug->external_ext != NULL) |
| 1383 | free (debug->external_ext); |
| 1384 | return FALSE; |
| 1385 | } |
| 1386 | |
| 1387 | /* Alpha ELF local labels start with '$'. */ |
| 1388 | |
| 1389 | static bfd_boolean |
| 1390 | elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name) |
| 1391 | { |
| 1392 | return name[0] == '$'; |
| 1393 | } |
| 1394 | |
| 1395 | /* Alpha ELF follows MIPS ELF in using a special find_nearest_line |
| 1396 | routine in order to handle the ECOFF debugging information. We |
| 1397 | still call this mips_elf_find_line because of the slot |
| 1398 | find_line_info in elf_obj_tdata is declared that way. */ |
| 1399 | |
| 1400 | struct mips_elf_find_line |
| 1401 | { |
| 1402 | struct ecoff_debug_info d; |
| 1403 | struct ecoff_find_line i; |
| 1404 | }; |
| 1405 | |
| 1406 | static bfd_boolean |
| 1407 | elf64_alpha_find_nearest_line (bfd *abfd, asection *section, asymbol **symbols, |
| 1408 | bfd_vma offset, const char **filename_ptr, |
| 1409 | const char **functionname_ptr, |
| 1410 | unsigned int *line_ptr) |
| 1411 | { |
| 1412 | asection *msec; |
| 1413 | |
| 1414 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, |
| 1415 | filename_ptr, functionname_ptr, |
| 1416 | line_ptr, 0, |
| 1417 | &elf_tdata (abfd)->dwarf2_find_line_info)) |
| 1418 | return TRUE; |
| 1419 | |
| 1420 | msec = bfd_get_section_by_name (abfd, ".mdebug"); |
| 1421 | if (msec != NULL) |
| 1422 | { |
| 1423 | flagword origflags; |
| 1424 | struct mips_elf_find_line *fi; |
| 1425 | const struct ecoff_debug_swap * const swap = |
| 1426 | get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 1427 | |
| 1428 | /* If we are called during a link, alpha_elf_final_link may have |
| 1429 | cleared the SEC_HAS_CONTENTS field. We force it back on here |
| 1430 | if appropriate (which it normally will be). */ |
| 1431 | origflags = msec->flags; |
| 1432 | if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS) |
| 1433 | msec->flags |= SEC_HAS_CONTENTS; |
| 1434 | |
| 1435 | fi = elf_tdata (abfd)->find_line_info; |
| 1436 | if (fi == NULL) |
| 1437 | { |
| 1438 | bfd_size_type external_fdr_size; |
| 1439 | char *fraw_src; |
| 1440 | char *fraw_end; |
| 1441 | struct fdr *fdr_ptr; |
| 1442 | bfd_size_type amt = sizeof (struct mips_elf_find_line); |
| 1443 | |
| 1444 | fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt); |
| 1445 | if (fi == NULL) |
| 1446 | { |
| 1447 | msec->flags = origflags; |
| 1448 | return FALSE; |
| 1449 | } |
| 1450 | |
| 1451 | if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d)) |
| 1452 | { |
| 1453 | msec->flags = origflags; |
| 1454 | return FALSE; |
| 1455 | } |
| 1456 | |
| 1457 | /* Swap in the FDR information. */ |
| 1458 | amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr); |
| 1459 | fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt); |
| 1460 | if (fi->d.fdr == NULL) |
| 1461 | { |
| 1462 | msec->flags = origflags; |
| 1463 | return FALSE; |
| 1464 | } |
| 1465 | external_fdr_size = swap->external_fdr_size; |
| 1466 | fdr_ptr = fi->d.fdr; |
| 1467 | fraw_src = (char *) fi->d.external_fdr; |
| 1468 | fraw_end = (fraw_src |
| 1469 | + fi->d.symbolic_header.ifdMax * external_fdr_size); |
| 1470 | for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) |
| 1471 | (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr); |
| 1472 | |
| 1473 | elf_tdata (abfd)->find_line_info = fi; |
| 1474 | |
| 1475 | /* Note that we don't bother to ever free this information. |
| 1476 | find_nearest_line is either called all the time, as in |
| 1477 | objdump -l, so the information should be saved, or it is |
| 1478 | rarely called, as in ld error messages, so the memory |
| 1479 | wasted is unimportant. Still, it would probably be a |
| 1480 | good idea for free_cached_info to throw it away. */ |
| 1481 | } |
| 1482 | |
| 1483 | if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, |
| 1484 | &fi->i, filename_ptr, functionname_ptr, |
| 1485 | line_ptr)) |
| 1486 | { |
| 1487 | msec->flags = origflags; |
| 1488 | return TRUE; |
| 1489 | } |
| 1490 | |
| 1491 | msec->flags = origflags; |
| 1492 | } |
| 1493 | |
| 1494 | /* Fall back on the generic ELF find_nearest_line routine. */ |
| 1495 | |
| 1496 | return _bfd_elf_find_nearest_line (abfd, section, symbols, offset, |
| 1497 | filename_ptr, functionname_ptr, |
| 1498 | line_ptr); |
| 1499 | } |
| 1500 | \f |
| 1501 | /* Structure used to pass information to alpha_elf_output_extsym. */ |
| 1502 | |
| 1503 | struct extsym_info |
| 1504 | { |
| 1505 | bfd *abfd; |
| 1506 | struct bfd_link_info *info; |
| 1507 | struct ecoff_debug_info *debug; |
| 1508 | const struct ecoff_debug_swap *swap; |
| 1509 | bfd_boolean failed; |
| 1510 | }; |
| 1511 | |
| 1512 | static bfd_boolean |
| 1513 | elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry *h, PTR data) |
| 1514 | { |
| 1515 | struct extsym_info *einfo = (struct extsym_info *) data; |
| 1516 | bfd_boolean strip; |
| 1517 | asection *sec, *output_section; |
| 1518 | |
| 1519 | if (h->root.root.type == bfd_link_hash_warning) |
| 1520 | h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; |
| 1521 | |
| 1522 | if (h->root.indx == -2) |
| 1523 | strip = FALSE; |
| 1524 | else if ((h->root.def_dynamic |
| 1525 | || h->root.ref_dynamic |
| 1526 | || h->root.root.type == bfd_link_hash_new) |
| 1527 | && !h->root.def_regular |
| 1528 | && !h->root.ref_regular) |
| 1529 | strip = TRUE; |
| 1530 | else if (einfo->info->strip == strip_all |
| 1531 | || (einfo->info->strip == strip_some |
| 1532 | && bfd_hash_lookup (einfo->info->keep_hash, |
| 1533 | h->root.root.root.string, |
| 1534 | FALSE, FALSE) == NULL)) |
| 1535 | strip = TRUE; |
| 1536 | else |
| 1537 | strip = FALSE; |
| 1538 | |
| 1539 | if (strip) |
| 1540 | return TRUE; |
| 1541 | |
| 1542 | if (h->esym.ifd == -2) |
| 1543 | { |
| 1544 | h->esym.jmptbl = 0; |
| 1545 | h->esym.cobol_main = 0; |
| 1546 | h->esym.weakext = 0; |
| 1547 | h->esym.reserved = 0; |
| 1548 | h->esym.ifd = ifdNil; |
| 1549 | h->esym.asym.value = 0; |
| 1550 | h->esym.asym.st = stGlobal; |
| 1551 | |
| 1552 | if (h->root.root.type != bfd_link_hash_defined |
| 1553 | && h->root.root.type != bfd_link_hash_defweak) |
| 1554 | h->esym.asym.sc = scAbs; |
| 1555 | else |
| 1556 | { |
| 1557 | const char *name; |
| 1558 | |
| 1559 | sec = h->root.root.u.def.section; |
| 1560 | output_section = sec->output_section; |
| 1561 | |
| 1562 | /* When making a shared library and symbol h is the one from |
| 1563 | the another shared library, OUTPUT_SECTION may be null. */ |
| 1564 | if (output_section == NULL) |
| 1565 | h->esym.asym.sc = scUndefined; |
| 1566 | else |
| 1567 | { |
| 1568 | name = bfd_section_name (output_section->owner, output_section); |
| 1569 | |
| 1570 | if (strcmp (name, ".text") == 0) |
| 1571 | h->esym.asym.sc = scText; |
| 1572 | else if (strcmp (name, ".data") == 0) |
| 1573 | h->esym.asym.sc = scData; |
| 1574 | else if (strcmp (name, ".sdata") == 0) |
| 1575 | h->esym.asym.sc = scSData; |
| 1576 | else if (strcmp (name, ".rodata") == 0 |
| 1577 | || strcmp (name, ".rdata") == 0) |
| 1578 | h->esym.asym.sc = scRData; |
| 1579 | else if (strcmp (name, ".bss") == 0) |
| 1580 | h->esym.asym.sc = scBss; |
| 1581 | else if (strcmp (name, ".sbss") == 0) |
| 1582 | h->esym.asym.sc = scSBss; |
| 1583 | else if (strcmp (name, ".init") == 0) |
| 1584 | h->esym.asym.sc = scInit; |
| 1585 | else if (strcmp (name, ".fini") == 0) |
| 1586 | h->esym.asym.sc = scFini; |
| 1587 | else |
| 1588 | h->esym.asym.sc = scAbs; |
| 1589 | } |
| 1590 | } |
| 1591 | |
| 1592 | h->esym.asym.reserved = 0; |
| 1593 | h->esym.asym.index = indexNil; |
| 1594 | } |
| 1595 | |
| 1596 | if (h->root.root.type == bfd_link_hash_common) |
| 1597 | h->esym.asym.value = h->root.root.u.c.size; |
| 1598 | else if (h->root.root.type == bfd_link_hash_defined |
| 1599 | || h->root.root.type == bfd_link_hash_defweak) |
| 1600 | { |
| 1601 | if (h->esym.asym.sc == scCommon) |
| 1602 | h->esym.asym.sc = scBss; |
| 1603 | else if (h->esym.asym.sc == scSCommon) |
| 1604 | h->esym.asym.sc = scSBss; |
| 1605 | |
| 1606 | sec = h->root.root.u.def.section; |
| 1607 | output_section = sec->output_section; |
| 1608 | if (output_section != NULL) |
| 1609 | h->esym.asym.value = (h->root.root.u.def.value |
| 1610 | + sec->output_offset |
| 1611 | + output_section->vma); |
| 1612 | else |
| 1613 | h->esym.asym.value = 0; |
| 1614 | } |
| 1615 | |
| 1616 | if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, |
| 1617 | h->root.root.root.string, |
| 1618 | &h->esym)) |
| 1619 | { |
| 1620 | einfo->failed = TRUE; |
| 1621 | return FALSE; |
| 1622 | } |
| 1623 | |
| 1624 | return TRUE; |
| 1625 | } |
| 1626 | \f |
| 1627 | /* Search for and possibly create a got entry. */ |
| 1628 | |
| 1629 | static struct alpha_elf_got_entry * |
| 1630 | get_got_entry (bfd *abfd, struct alpha_elf_link_hash_entry *h, |
| 1631 | unsigned long r_type, unsigned long r_symndx, |
| 1632 | bfd_vma r_addend) |
| 1633 | { |
| 1634 | struct alpha_elf_got_entry *gotent; |
| 1635 | struct alpha_elf_got_entry **slot; |
| 1636 | |
| 1637 | if (h) |
| 1638 | slot = &h->got_entries; |
| 1639 | else |
| 1640 | { |
| 1641 | /* This is a local .got entry -- record for merge. */ |
| 1642 | |
| 1643 | struct alpha_elf_got_entry **local_got_entries; |
| 1644 | |
| 1645 | local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; |
| 1646 | if (!local_got_entries) |
| 1647 | { |
| 1648 | bfd_size_type size; |
| 1649 | Elf_Internal_Shdr *symtab_hdr; |
| 1650 | |
| 1651 | symtab_hdr = &elf_tdata(abfd)->symtab_hdr; |
| 1652 | size = symtab_hdr->sh_info; |
| 1653 | size *= sizeof (struct alpha_elf_got_entry *); |
| 1654 | |
| 1655 | local_got_entries |
| 1656 | = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size); |
| 1657 | if (!local_got_entries) |
| 1658 | return NULL; |
| 1659 | |
| 1660 | alpha_elf_tdata (abfd)->local_got_entries = local_got_entries; |
| 1661 | } |
| 1662 | |
| 1663 | slot = &local_got_entries[r_symndx]; |
| 1664 | } |
| 1665 | |
| 1666 | for (gotent = *slot; gotent ; gotent = gotent->next) |
| 1667 | if (gotent->gotobj == abfd |
| 1668 | && gotent->reloc_type == r_type |
| 1669 | && gotent->addend == r_addend) |
| 1670 | break; |
| 1671 | |
| 1672 | if (!gotent) |
| 1673 | { |
| 1674 | int entry_size; |
| 1675 | bfd_size_type amt; |
| 1676 | |
| 1677 | amt = sizeof (struct alpha_elf_got_entry); |
| 1678 | gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt); |
| 1679 | if (!gotent) |
| 1680 | return NULL; |
| 1681 | |
| 1682 | gotent->gotobj = abfd; |
| 1683 | gotent->addend = r_addend; |
| 1684 | gotent->got_offset = -1; |
| 1685 | gotent->plt_offset = -1; |
| 1686 | gotent->use_count = 1; |
| 1687 | gotent->reloc_type = r_type; |
| 1688 | gotent->reloc_done = 0; |
| 1689 | gotent->reloc_xlated = 0; |
| 1690 | |
| 1691 | gotent->next = *slot; |
| 1692 | *slot = gotent; |
| 1693 | |
| 1694 | entry_size = alpha_got_entry_size (r_type); |
| 1695 | alpha_elf_tdata (abfd)->total_got_size += entry_size; |
| 1696 | if (!h) |
| 1697 | alpha_elf_tdata(abfd)->local_got_size += entry_size; |
| 1698 | } |
| 1699 | else |
| 1700 | gotent->use_count += 1; |
| 1701 | |
| 1702 | return gotent; |
| 1703 | } |
| 1704 | |
| 1705 | static bfd_boolean |
| 1706 | elf64_alpha_want_plt (struct alpha_elf_link_hash_entry *ah) |
| 1707 | { |
| 1708 | return ((ah->root.type == STT_FUNC |
| 1709 | || ah->root.root.type == bfd_link_hash_undefweak |
| 1710 | || ah->root.root.type == bfd_link_hash_undefined) |
| 1711 | && (ah->flags & ALPHA_ELF_LINK_HASH_LU_PLT) != 0 |
| 1712 | && (ah->flags & ~ALPHA_ELF_LINK_HASH_LU_PLT) == 0); |
| 1713 | } |
| 1714 | |
| 1715 | /* Handle dynamic relocations when doing an Alpha ELF link. */ |
| 1716 | |
| 1717 | static bfd_boolean |
| 1718 | elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 1719 | asection *sec, const Elf_Internal_Rela *relocs) |
| 1720 | { |
| 1721 | bfd *dynobj; |
| 1722 | asection *sreloc; |
| 1723 | const char *rel_sec_name; |
| 1724 | Elf_Internal_Shdr *symtab_hdr; |
| 1725 | struct alpha_elf_link_hash_entry **sym_hashes; |
| 1726 | const Elf_Internal_Rela *rel, *relend; |
| 1727 | bfd_size_type amt; |
| 1728 | |
| 1729 | if (info->relocatable) |
| 1730 | return TRUE; |
| 1731 | |
| 1732 | /* Don't do anything special with non-loaded, non-alloced sections. |
| 1733 | In particular, any relocs in such sections should not affect GOT |
| 1734 | and PLT reference counting (ie. we don't allow them to create GOT |
| 1735 | or PLT entries), there's no possibility or desire to optimize TLS |
| 1736 | relocs, and there's not much point in propagating relocs to shared |
| 1737 | libs that the dynamic linker won't relocate. */ |
| 1738 | if ((sec->flags & SEC_ALLOC) == 0) |
| 1739 | return TRUE; |
| 1740 | |
| 1741 | dynobj = elf_hash_table(info)->dynobj; |
| 1742 | if (dynobj == NULL) |
| 1743 | elf_hash_table(info)->dynobj = dynobj = abfd; |
| 1744 | |
| 1745 | sreloc = NULL; |
| 1746 | rel_sec_name = NULL; |
| 1747 | symtab_hdr = &elf_tdata(abfd)->symtab_hdr; |
| 1748 | sym_hashes = alpha_elf_sym_hashes(abfd); |
| 1749 | |
| 1750 | relend = relocs + sec->reloc_count; |
| 1751 | for (rel = relocs; rel < relend; ++rel) |
| 1752 | { |
| 1753 | enum { |
| 1754 | NEED_GOT = 1, |
| 1755 | NEED_GOT_ENTRY = 2, |
| 1756 | NEED_DYNREL = 4 |
| 1757 | }; |
| 1758 | |
| 1759 | unsigned long r_symndx, r_type; |
| 1760 | struct alpha_elf_link_hash_entry *h; |
| 1761 | unsigned int gotent_flags; |
| 1762 | bfd_boolean maybe_dynamic; |
| 1763 | unsigned int need; |
| 1764 | bfd_vma addend; |
| 1765 | |
| 1766 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 1767 | if (r_symndx < symtab_hdr->sh_info) |
| 1768 | h = NULL; |
| 1769 | else |
| 1770 | { |
| 1771 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1772 | |
| 1773 | while (h->root.root.type == bfd_link_hash_indirect |
| 1774 | || h->root.root.type == bfd_link_hash_warning) |
| 1775 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
| 1776 | |
| 1777 | h->root.ref_regular = 1; |
| 1778 | } |
| 1779 | |
| 1780 | /* We can only get preliminary data on whether a symbol is |
| 1781 | locally or externally defined, as not all of the input files |
| 1782 | have yet been processed. Do something with what we know, as |
| 1783 | this may help reduce memory usage and processing time later. */ |
| 1784 | maybe_dynamic = FALSE; |
| 1785 | if (h && ((info->shared |
| 1786 | && (!info->symbolic |
| 1787 | || info->unresolved_syms_in_shared_libs == RM_IGNORE)) |
| 1788 | || !h->root.def_regular |
| 1789 | || h->root.root.type == bfd_link_hash_defweak)) |
| 1790 | maybe_dynamic = TRUE; |
| 1791 | |
| 1792 | need = 0; |
| 1793 | gotent_flags = 0; |
| 1794 | r_type = ELF64_R_TYPE (rel->r_info); |
| 1795 | addend = rel->r_addend; |
| 1796 | |
| 1797 | switch (r_type) |
| 1798 | { |
| 1799 | case R_ALPHA_LITERAL: |
| 1800 | need = NEED_GOT | NEED_GOT_ENTRY; |
| 1801 | |
| 1802 | /* Remember how this literal is used from its LITUSEs. |
| 1803 | This will be important when it comes to decide if we can |
| 1804 | create a .plt entry for a function symbol. */ |
| 1805 | while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE) |
| 1806 | if (rel->r_addend >= 1 && rel->r_addend <= 6) |
| 1807 | gotent_flags |= 1 << rel->r_addend; |
| 1808 | --rel; |
| 1809 | |
| 1810 | /* No LITUSEs -- presumably the address is used somehow. */ |
| 1811 | if (gotent_flags == 0) |
| 1812 | gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR; |
| 1813 | break; |
| 1814 | |
| 1815 | case R_ALPHA_GPDISP: |
| 1816 | case R_ALPHA_GPREL16: |
| 1817 | case R_ALPHA_GPREL32: |
| 1818 | case R_ALPHA_GPRELHIGH: |
| 1819 | case R_ALPHA_GPRELLOW: |
| 1820 | case R_ALPHA_BRSGP: |
| 1821 | need = NEED_GOT; |
| 1822 | break; |
| 1823 | |
| 1824 | case R_ALPHA_REFLONG: |
| 1825 | case R_ALPHA_REFQUAD: |
| 1826 | if (info->shared || maybe_dynamic) |
| 1827 | need = NEED_DYNREL; |
| 1828 | break; |
| 1829 | |
| 1830 | case R_ALPHA_TLSLDM: |
| 1831 | /* The symbol for a TLSLDM reloc is ignored. Collapse the |
| 1832 | reloc to the 0 symbol so that they all match. */ |
| 1833 | r_symndx = 0; |
| 1834 | h = 0; |
| 1835 | maybe_dynamic = FALSE; |
| 1836 | /* FALLTHRU */ |
| 1837 | |
| 1838 | case R_ALPHA_TLSGD: |
| 1839 | case R_ALPHA_GOTDTPREL: |
| 1840 | need = NEED_GOT | NEED_GOT_ENTRY; |
| 1841 | break; |
| 1842 | |
| 1843 | case R_ALPHA_GOTTPREL: |
| 1844 | need = NEED_GOT | NEED_GOT_ENTRY; |
| 1845 | gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE; |
| 1846 | if (info->shared) |
| 1847 | info->flags |= DF_STATIC_TLS; |
| 1848 | break; |
| 1849 | |
| 1850 | case R_ALPHA_TPREL64: |
| 1851 | if (info->shared || maybe_dynamic) |
| 1852 | need = NEED_DYNREL; |
| 1853 | if (info->shared) |
| 1854 | info->flags |= DF_STATIC_TLS; |
| 1855 | break; |
| 1856 | } |
| 1857 | |
| 1858 | if (need & NEED_GOT) |
| 1859 | { |
| 1860 | if (alpha_elf_tdata(abfd)->gotobj == NULL) |
| 1861 | { |
| 1862 | if (!elf64_alpha_create_got_section (abfd, info)) |
| 1863 | return FALSE; |
| 1864 | } |
| 1865 | } |
| 1866 | |
| 1867 | if (need & NEED_GOT_ENTRY) |
| 1868 | { |
| 1869 | struct alpha_elf_got_entry *gotent; |
| 1870 | |
| 1871 | gotent = get_got_entry (abfd, h, r_type, r_symndx, addend); |
| 1872 | if (!gotent) |
| 1873 | return FALSE; |
| 1874 | |
| 1875 | if (gotent_flags) |
| 1876 | { |
| 1877 | gotent->flags |= gotent_flags; |
| 1878 | if (h) |
| 1879 | { |
| 1880 | gotent_flags |= h->flags; |
| 1881 | h->flags = gotent_flags; |
| 1882 | |
| 1883 | /* Make a guess as to whether a .plt entry is needed. */ |
| 1884 | /* ??? It appears that we won't make it into |
| 1885 | adjust_dynamic_symbol for symbols that remain |
| 1886 | totally undefined. Copying this check here means |
| 1887 | we can create a plt entry for them too. */ |
| 1888 | h->root.needs_plt |
| 1889 | = (maybe_dynamic && elf64_alpha_want_plt (h)); |
| 1890 | } |
| 1891 | } |
| 1892 | } |
| 1893 | |
| 1894 | if (need & NEED_DYNREL) |
| 1895 | { |
| 1896 | if (rel_sec_name == NULL) |
| 1897 | { |
| 1898 | rel_sec_name = (bfd_elf_string_from_elf_section |
| 1899 | (abfd, elf_elfheader(abfd)->e_shstrndx, |
| 1900 | elf_section_data(sec)->rel_hdr.sh_name)); |
| 1901 | if (rel_sec_name == NULL) |
| 1902 | return FALSE; |
| 1903 | |
| 1904 | BFD_ASSERT (CONST_STRNEQ (rel_sec_name, ".rela") |
| 1905 | && strcmp (bfd_get_section_name (abfd, sec), |
| 1906 | rel_sec_name+5) == 0); |
| 1907 | } |
| 1908 | |
| 1909 | /* We need to create the section here now whether we eventually |
| 1910 | use it or not so that it gets mapped to an output section by |
| 1911 | the linker. If not used, we'll kill it in |
| 1912 | size_dynamic_sections. */ |
| 1913 | if (sreloc == NULL) |
| 1914 | { |
| 1915 | sreloc = bfd_get_section_by_name (dynobj, rel_sec_name); |
| 1916 | if (sreloc == NULL) |
| 1917 | { |
| 1918 | flagword flags; |
| 1919 | |
| 1920 | flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 1921 | | SEC_LINKER_CREATED | SEC_READONLY); |
| 1922 | if (sec->flags & SEC_ALLOC) |
| 1923 | flags |= SEC_ALLOC | SEC_LOAD; |
| 1924 | sreloc = bfd_make_section_with_flags (dynobj, |
| 1925 | rel_sec_name, |
| 1926 | flags); |
| 1927 | if (sreloc == NULL |
| 1928 | || !bfd_set_section_alignment (dynobj, sreloc, 3)) |
| 1929 | return FALSE; |
| 1930 | } |
| 1931 | } |
| 1932 | |
| 1933 | if (h) |
| 1934 | { |
| 1935 | /* Since we havn't seen all of the input symbols yet, we |
| 1936 | don't know whether we'll actually need a dynamic relocation |
| 1937 | entry for this reloc. So make a record of it. Once we |
| 1938 | find out if this thing needs dynamic relocation we'll |
| 1939 | expand the relocation sections by the appropriate amount. */ |
| 1940 | |
| 1941 | struct alpha_elf_reloc_entry *rent; |
| 1942 | |
| 1943 | for (rent = h->reloc_entries; rent; rent = rent->next) |
| 1944 | if (rent->rtype == r_type && rent->srel == sreloc) |
| 1945 | break; |
| 1946 | |
| 1947 | if (!rent) |
| 1948 | { |
| 1949 | amt = sizeof (struct alpha_elf_reloc_entry); |
| 1950 | rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt); |
| 1951 | if (!rent) |
| 1952 | return FALSE; |
| 1953 | |
| 1954 | rent->srel = sreloc; |
| 1955 | rent->rtype = r_type; |
| 1956 | rent->count = 1; |
| 1957 | rent->reltext = (sec->flags & SEC_READONLY) != 0; |
| 1958 | |
| 1959 | rent->next = h->reloc_entries; |
| 1960 | h->reloc_entries = rent; |
| 1961 | } |
| 1962 | else |
| 1963 | rent->count++; |
| 1964 | } |
| 1965 | else if (info->shared) |
| 1966 | { |
| 1967 | /* If this is a shared library, and the section is to be |
| 1968 | loaded into memory, we need a RELATIVE reloc. */ |
| 1969 | sreloc->size += sizeof (Elf64_External_Rela); |
| 1970 | if (sec->flags & SEC_READONLY) |
| 1971 | info->flags |= DF_TEXTREL; |
| 1972 | } |
| 1973 | } |
| 1974 | } |
| 1975 | |
| 1976 | return TRUE; |
| 1977 | } |
| 1978 | |
| 1979 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1980 | regular object. The current definition is in some section of the |
| 1981 | dynamic object, but we're not including those sections. We have to |
| 1982 | change the definition to something the rest of the link can |
| 1983 | understand. */ |
| 1984 | |
| 1985 | static bfd_boolean |
| 1986 | elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 1987 | struct elf_link_hash_entry *h) |
| 1988 | { |
| 1989 | bfd *dynobj; |
| 1990 | asection *s; |
| 1991 | struct alpha_elf_link_hash_entry *ah; |
| 1992 | |
| 1993 | dynobj = elf_hash_table(info)->dynobj; |
| 1994 | ah = (struct alpha_elf_link_hash_entry *)h; |
| 1995 | |
| 1996 | /* Now that we've seen all of the input symbols, finalize our decision |
| 1997 | about whether this symbol should get a .plt entry. Irritatingly, it |
| 1998 | is common for folk to leave undefined symbols in shared libraries, |
| 1999 | and they still expect lazy binding; accept undefined symbols in lieu |
| 2000 | of STT_FUNC. */ |
| 2001 | if (alpha_elf_dynamic_symbol_p (h, info) && elf64_alpha_want_plt (ah)) |
| 2002 | { |
| 2003 | h->needs_plt = TRUE; |
| 2004 | |
| 2005 | s = bfd_get_section_by_name(dynobj, ".plt"); |
| 2006 | if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info)) |
| 2007 | return FALSE; |
| 2008 | |
| 2009 | /* We need one plt entry per got subsection. Delay allocation of |
| 2010 | the actual plt entries until size_plt_section, called from |
| 2011 | size_dynamic_sections or during relaxation. */ |
| 2012 | |
| 2013 | return TRUE; |
| 2014 | } |
| 2015 | else |
| 2016 | h->needs_plt = FALSE; |
| 2017 | |
| 2018 | /* If this is a weak symbol, and there is a real definition, the |
| 2019 | processor independent code will have arranged for us to see the |
| 2020 | real definition first, and we can just use the same value. */ |
| 2021 | if (h->u.weakdef != NULL) |
| 2022 | { |
| 2023 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 2024 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 2025 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 2026 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 2027 | return TRUE; |
| 2028 | } |
| 2029 | |
| 2030 | /* This is a reference to a symbol defined by a dynamic object which |
| 2031 | is not a function. The Alpha, since it uses .got entries for all |
| 2032 | symbols even in regular objects, does not need the hackery of a |
| 2033 | .dynbss section and COPY dynamic relocations. */ |
| 2034 | |
| 2035 | return TRUE; |
| 2036 | } |
| 2037 | |
| 2038 | /* Symbol versioning can create new symbols, and make our old symbols |
| 2039 | indirect to the new ones. Consolidate the got and reloc information |
| 2040 | in these situations. */ |
| 2041 | |
| 2042 | static bfd_boolean |
| 2043 | elf64_alpha_merge_ind_symbols (struct alpha_elf_link_hash_entry *hi, |
| 2044 | PTR dummy ATTRIBUTE_UNUSED) |
| 2045 | { |
| 2046 | struct alpha_elf_link_hash_entry *hs; |
| 2047 | |
| 2048 | if (hi->root.root.type != bfd_link_hash_indirect) |
| 2049 | return TRUE; |
| 2050 | hs = hi; |
| 2051 | do { |
| 2052 | hs = (struct alpha_elf_link_hash_entry *)hs->root.root.u.i.link; |
| 2053 | } while (hs->root.root.type == bfd_link_hash_indirect); |
| 2054 | |
| 2055 | /* Merge the flags. Whee. */ |
| 2056 | |
| 2057 | hs->flags |= hi->flags; |
| 2058 | |
| 2059 | /* Merge the .got entries. Cannibalize the old symbol's list in |
| 2060 | doing so, since we don't need it anymore. */ |
| 2061 | |
| 2062 | if (hs->got_entries == NULL) |
| 2063 | hs->got_entries = hi->got_entries; |
| 2064 | else |
| 2065 | { |
| 2066 | struct alpha_elf_got_entry *gi, *gs, *gin, *gsh; |
| 2067 | |
| 2068 | gsh = hs->got_entries; |
| 2069 | for (gi = hi->got_entries; gi ; gi = gin) |
| 2070 | { |
| 2071 | gin = gi->next; |
| 2072 | for (gs = gsh; gs ; gs = gs->next) |
| 2073 | if (gi->gotobj == gs->gotobj |
| 2074 | && gi->reloc_type == gs->reloc_type |
| 2075 | && gi->addend == gs->addend) |
| 2076 | { |
| 2077 | gi->use_count += gs->use_count; |
| 2078 | goto got_found; |
| 2079 | } |
| 2080 | gi->next = hs->got_entries; |
| 2081 | hs->got_entries = gi; |
| 2082 | got_found:; |
| 2083 | } |
| 2084 | } |
| 2085 | hi->got_entries = NULL; |
| 2086 | |
| 2087 | /* And similar for the reloc entries. */ |
| 2088 | |
| 2089 | if (hs->reloc_entries == NULL) |
| 2090 | hs->reloc_entries = hi->reloc_entries; |
| 2091 | else |
| 2092 | { |
| 2093 | struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh; |
| 2094 | |
| 2095 | rsh = hs->reloc_entries; |
| 2096 | for (ri = hi->reloc_entries; ri ; ri = rin) |
| 2097 | { |
| 2098 | rin = ri->next; |
| 2099 | for (rs = rsh; rs ; rs = rs->next) |
| 2100 | if (ri->rtype == rs->rtype && ri->srel == rs->srel) |
| 2101 | { |
| 2102 | rs->count += ri->count; |
| 2103 | goto found_reloc; |
| 2104 | } |
| 2105 | ri->next = hs->reloc_entries; |
| 2106 | hs->reloc_entries = ri; |
| 2107 | found_reloc:; |
| 2108 | } |
| 2109 | } |
| 2110 | hi->reloc_entries = NULL; |
| 2111 | |
| 2112 | return TRUE; |
| 2113 | } |
| 2114 | |
| 2115 | /* Is it possible to merge two object file's .got tables? */ |
| 2116 | |
| 2117 | static bfd_boolean |
| 2118 | elf64_alpha_can_merge_gots (bfd *a, bfd *b) |
| 2119 | { |
| 2120 | int total = alpha_elf_tdata (a)->total_got_size; |
| 2121 | bfd *bsub; |
| 2122 | |
| 2123 | /* Trivial quick fallout test. */ |
| 2124 | if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE) |
| 2125 | return TRUE; |
| 2126 | |
| 2127 | /* By their nature, local .got entries cannot be merged. */ |
| 2128 | if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE) |
| 2129 | return FALSE; |
| 2130 | |
| 2131 | /* Failing the common trivial comparison, we must effectively |
| 2132 | perform the merge. Not actually performing the merge means that |
| 2133 | we don't have to store undo information in case we fail. */ |
| 2134 | for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) |
| 2135 | { |
| 2136 | struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub); |
| 2137 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr; |
| 2138 | int i, n; |
| 2139 | |
| 2140 | n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; |
| 2141 | for (i = 0; i < n; ++i) |
| 2142 | { |
| 2143 | struct alpha_elf_got_entry *ae, *be; |
| 2144 | struct alpha_elf_link_hash_entry *h; |
| 2145 | |
| 2146 | h = hashes[i]; |
| 2147 | while (h->root.root.type == bfd_link_hash_indirect |
| 2148 | || h->root.root.type == bfd_link_hash_warning) |
| 2149 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
| 2150 | |
| 2151 | for (be = h->got_entries; be ; be = be->next) |
| 2152 | { |
| 2153 | if (be->use_count == 0) |
| 2154 | continue; |
| 2155 | if (be->gotobj != b) |
| 2156 | continue; |
| 2157 | |
| 2158 | for (ae = h->got_entries; ae ; ae = ae->next) |
| 2159 | if (ae->gotobj == a |
| 2160 | && ae->reloc_type == be->reloc_type |
| 2161 | && ae->addend == be->addend) |
| 2162 | goto global_found; |
| 2163 | |
| 2164 | total += alpha_got_entry_size (be->reloc_type); |
| 2165 | if (total > MAX_GOT_SIZE) |
| 2166 | return FALSE; |
| 2167 | global_found:; |
| 2168 | } |
| 2169 | } |
| 2170 | } |
| 2171 | |
| 2172 | return TRUE; |
| 2173 | } |
| 2174 | |
| 2175 | /* Actually merge two .got tables. */ |
| 2176 | |
| 2177 | static void |
| 2178 | elf64_alpha_merge_gots (bfd *a, bfd *b) |
| 2179 | { |
| 2180 | int total = alpha_elf_tdata (a)->total_got_size; |
| 2181 | bfd *bsub; |
| 2182 | |
| 2183 | /* Remember local expansion. */ |
| 2184 | { |
| 2185 | int e = alpha_elf_tdata (b)->local_got_size; |
| 2186 | total += e; |
| 2187 | alpha_elf_tdata (a)->local_got_size += e; |
| 2188 | } |
| 2189 | |
| 2190 | for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) |
| 2191 | { |
| 2192 | struct alpha_elf_got_entry **local_got_entries; |
| 2193 | struct alpha_elf_link_hash_entry **hashes; |
| 2194 | Elf_Internal_Shdr *symtab_hdr; |
| 2195 | int i, n; |
| 2196 | |
| 2197 | /* Let the local .got entries know they are part of a new subsegment. */ |
| 2198 | local_got_entries = alpha_elf_tdata (bsub)->local_got_entries; |
| 2199 | if (local_got_entries) |
| 2200 | { |
| 2201 | n = elf_tdata (bsub)->symtab_hdr.sh_info; |
| 2202 | for (i = 0; i < n; ++i) |
| 2203 | { |
| 2204 | struct alpha_elf_got_entry *ent; |
| 2205 | for (ent = local_got_entries[i]; ent; ent = ent->next) |
| 2206 | ent->gotobj = a; |
| 2207 | } |
| 2208 | } |
| 2209 | |
| 2210 | /* Merge the global .got entries. */ |
| 2211 | hashes = alpha_elf_sym_hashes (bsub); |
| 2212 | symtab_hdr = &elf_tdata (bsub)->symtab_hdr; |
| 2213 | |
| 2214 | n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; |
| 2215 | for (i = 0; i < n; ++i) |
| 2216 | { |
| 2217 | struct alpha_elf_got_entry *ae, *be, **pbe, **start; |
| 2218 | struct alpha_elf_link_hash_entry *h; |
| 2219 | |
| 2220 | h = hashes[i]; |
| 2221 | while (h->root.root.type == bfd_link_hash_indirect |
| 2222 | || h->root.root.type == bfd_link_hash_warning) |
| 2223 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
| 2224 | |
| 2225 | pbe = start = &h->got_entries; |
| 2226 | while ((be = *pbe) != NULL) |
| 2227 | { |
| 2228 | if (be->use_count == 0) |
| 2229 | { |
| 2230 | *pbe = be->next; |
| 2231 | memset (be, 0xa5, sizeof (*be)); |
| 2232 | goto kill; |
| 2233 | } |
| 2234 | if (be->gotobj != b) |
| 2235 | goto next; |
| 2236 | |
| 2237 | for (ae = *start; ae ; ae = ae->next) |
| 2238 | if (ae->gotobj == a |
| 2239 | && ae->reloc_type == be->reloc_type |
| 2240 | && ae->addend == be->addend) |
| 2241 | { |
| 2242 | ae->flags |= be->flags; |
| 2243 | ae->use_count += be->use_count; |
| 2244 | *pbe = be->next; |
| 2245 | memset (be, 0xa5, sizeof (*be)); |
| 2246 | goto kill; |
| 2247 | } |
| 2248 | be->gotobj = a; |
| 2249 | total += alpha_got_entry_size (be->reloc_type); |
| 2250 | |
| 2251 | next:; |
| 2252 | pbe = &be->next; |
| 2253 | kill:; |
| 2254 | } |
| 2255 | } |
| 2256 | |
| 2257 | alpha_elf_tdata (bsub)->gotobj = a; |
| 2258 | } |
| 2259 | alpha_elf_tdata (a)->total_got_size = total; |
| 2260 | |
| 2261 | /* Merge the two in_got chains. */ |
| 2262 | { |
| 2263 | bfd *next; |
| 2264 | |
| 2265 | bsub = a; |
| 2266 | while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL) |
| 2267 | bsub = next; |
| 2268 | |
| 2269 | alpha_elf_tdata (bsub)->in_got_link_next = b; |
| 2270 | } |
| 2271 | } |
| 2272 | |
| 2273 | /* Calculate the offsets for the got entries. */ |
| 2274 | |
| 2275 | static bfd_boolean |
| 2276 | elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h, |
| 2277 | PTR arg ATTRIBUTE_UNUSED) |
| 2278 | { |
| 2279 | struct alpha_elf_got_entry *gotent; |
| 2280 | |
| 2281 | if (h->root.root.type == bfd_link_hash_warning) |
| 2282 | h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; |
| 2283 | |
| 2284 | for (gotent = h->got_entries; gotent; gotent = gotent->next) |
| 2285 | if (gotent->use_count > 0) |
| 2286 | { |
| 2287 | struct alpha_elf_obj_tdata *td; |
| 2288 | bfd_size_type *plge; |
| 2289 | |
| 2290 | td = alpha_elf_tdata (gotent->gotobj); |
| 2291 | plge = &td->got->size; |
| 2292 | gotent->got_offset = *plge; |
| 2293 | *plge += alpha_got_entry_size (gotent->reloc_type); |
| 2294 | } |
| 2295 | |
| 2296 | return TRUE; |
| 2297 | } |
| 2298 | |
| 2299 | static void |
| 2300 | elf64_alpha_calc_got_offsets (struct bfd_link_info *info) |
| 2301 | { |
| 2302 | bfd *i, *got_list = alpha_elf_hash_table(info)->got_list; |
| 2303 | |
| 2304 | /* First, zero out the .got sizes, as we may be recalculating the |
| 2305 | .got after optimizing it. */ |
| 2306 | for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) |
| 2307 | alpha_elf_tdata(i)->got->size = 0; |
| 2308 | |
| 2309 | /* Next, fill in the offsets for all the global entries. */ |
| 2310 | alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), |
| 2311 | elf64_alpha_calc_got_offsets_for_symbol, |
| 2312 | NULL); |
| 2313 | |
| 2314 | /* Finally, fill in the offsets for the local entries. */ |
| 2315 | for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) |
| 2316 | { |
| 2317 | bfd_size_type got_offset = alpha_elf_tdata(i)->got->size; |
| 2318 | bfd *j; |
| 2319 | |
| 2320 | for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) |
| 2321 | { |
| 2322 | struct alpha_elf_got_entry **local_got_entries, *gotent; |
| 2323 | int k, n; |
| 2324 | |
| 2325 | local_got_entries = alpha_elf_tdata(j)->local_got_entries; |
| 2326 | if (!local_got_entries) |
| 2327 | continue; |
| 2328 | |
| 2329 | for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) |
| 2330 | for (gotent = local_got_entries[k]; gotent; gotent = gotent->next) |
| 2331 | if (gotent->use_count > 0) |
| 2332 | { |
| 2333 | gotent->got_offset = got_offset; |
| 2334 | got_offset += alpha_got_entry_size (gotent->reloc_type); |
| 2335 | } |
| 2336 | } |
| 2337 | |
| 2338 | alpha_elf_tdata(i)->got->size = got_offset; |
| 2339 | } |
| 2340 | } |
| 2341 | |
| 2342 | /* Constructs the gots. */ |
| 2343 | |
| 2344 | static bfd_boolean |
| 2345 | elf64_alpha_size_got_sections (struct bfd_link_info *info) |
| 2346 | { |
| 2347 | bfd *i, *got_list, *cur_got_obj = NULL; |
| 2348 | int something_changed = 0; |
| 2349 | |
| 2350 | got_list = alpha_elf_hash_table (info)->got_list; |
| 2351 | |
| 2352 | /* On the first time through, pretend we have an existing got list |
| 2353 | consisting of all of the input files. */ |
| 2354 | if (got_list == NULL) |
| 2355 | { |
| 2356 | for (i = info->input_bfds; i ; i = i->link_next) |
| 2357 | { |
| 2358 | bfd *this_got = alpha_elf_tdata (i)->gotobj; |
| 2359 | if (this_got == NULL) |
| 2360 | continue; |
| 2361 | |
| 2362 | /* We are assuming no merging has yet occurred. */ |
| 2363 | BFD_ASSERT (this_got == i); |
| 2364 | |
| 2365 | if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE) |
| 2366 | { |
| 2367 | /* Yikes! A single object file has too many entries. */ |
| 2368 | (*_bfd_error_handler) |
| 2369 | (_("%B: .got subsegment exceeds 64K (size %d)"), |
| 2370 | i, alpha_elf_tdata (this_got)->total_got_size); |
| 2371 | return FALSE; |
| 2372 | } |
| 2373 | |
| 2374 | if (got_list == NULL) |
| 2375 | got_list = this_got; |
| 2376 | else |
| 2377 | alpha_elf_tdata(cur_got_obj)->got_link_next = this_got; |
| 2378 | cur_got_obj = this_got; |
| 2379 | } |
| 2380 | |
| 2381 | /* Strange degenerate case of no got references. */ |
| 2382 | if (got_list == NULL) |
| 2383 | return TRUE; |
| 2384 | |
| 2385 | alpha_elf_hash_table (info)->got_list = got_list; |
| 2386 | |
| 2387 | /* Force got offsets to be recalculated. */ |
| 2388 | something_changed = 1; |
| 2389 | } |
| 2390 | |
| 2391 | cur_got_obj = got_list; |
| 2392 | i = alpha_elf_tdata(cur_got_obj)->got_link_next; |
| 2393 | while (i != NULL) |
| 2394 | { |
| 2395 | if (elf64_alpha_can_merge_gots (cur_got_obj, i)) |
| 2396 | { |
| 2397 | elf64_alpha_merge_gots (cur_got_obj, i); |
| 2398 | |
| 2399 | alpha_elf_tdata(i)->got->size = 0; |
| 2400 | i = alpha_elf_tdata(i)->got_link_next; |
| 2401 | alpha_elf_tdata(cur_got_obj)->got_link_next = i; |
| 2402 | |
| 2403 | something_changed = 1; |
| 2404 | } |
| 2405 | else |
| 2406 | { |
| 2407 | cur_got_obj = i; |
| 2408 | i = alpha_elf_tdata(i)->got_link_next; |
| 2409 | } |
| 2410 | } |
| 2411 | |
| 2412 | /* Once the gots have been merged, fill in the got offsets for |
| 2413 | everything therein. */ |
| 2414 | if (1 || something_changed) |
| 2415 | elf64_alpha_calc_got_offsets (info); |
| 2416 | |
| 2417 | return TRUE; |
| 2418 | } |
| 2419 | |
| 2420 | static bfd_boolean |
| 2421 | elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h, PTR data) |
| 2422 | { |
| 2423 | asection *splt = (asection *) data; |
| 2424 | struct alpha_elf_got_entry *gotent; |
| 2425 | bfd_boolean saw_one = FALSE; |
| 2426 | |
| 2427 | /* If we didn't need an entry before, we still don't. */ |
| 2428 | if (!h->root.needs_plt) |
| 2429 | return TRUE; |
| 2430 | |
| 2431 | /* For each LITERAL got entry still in use, allocate a plt entry. */ |
| 2432 | for (gotent = h->got_entries; gotent ; gotent = gotent->next) |
| 2433 | if (gotent->reloc_type == R_ALPHA_LITERAL |
| 2434 | && gotent->use_count > 0) |
| 2435 | { |
| 2436 | if (splt->size == 0) |
| 2437 | splt->size = PLT_HEADER_SIZE; |
| 2438 | gotent->plt_offset = splt->size; |
| 2439 | splt->size += PLT_ENTRY_SIZE; |
| 2440 | saw_one = TRUE; |
| 2441 | } |
| 2442 | |
| 2443 | /* If there weren't any, there's no longer a need for the PLT entry. */ |
| 2444 | if (!saw_one) |
| 2445 | h->root.needs_plt = FALSE; |
| 2446 | |
| 2447 | return TRUE; |
| 2448 | } |
| 2449 | |
| 2450 | /* Called from relax_section to rebuild the PLT in light of |
| 2451 | potential changes in the function's status. */ |
| 2452 | |
| 2453 | static bfd_boolean |
| 2454 | elf64_alpha_size_plt_section (struct bfd_link_info *info) |
| 2455 | { |
| 2456 | asection *splt, *spltrel, *sgotplt; |
| 2457 | unsigned long entries; |
| 2458 | bfd *dynobj; |
| 2459 | |
| 2460 | dynobj = elf_hash_table(info)->dynobj; |
| 2461 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2462 | if (splt == NULL) |
| 2463 | return TRUE; |
| 2464 | |
| 2465 | splt->size = 0; |
| 2466 | |
| 2467 | alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), |
| 2468 | elf64_alpha_size_plt_section_1, splt); |
| 2469 | |
| 2470 | /* Every plt entry requires a JMP_SLOT relocation. */ |
| 2471 | spltrel = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 2472 | if (splt->size) |
| 2473 | { |
| 2474 | if (elf64_alpha_use_secureplt) |
| 2475 | entries = (splt->size - NEW_PLT_HEADER_SIZE) / NEW_PLT_ENTRY_SIZE; |
| 2476 | else |
| 2477 | entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE; |
| 2478 | } |
| 2479 | else |
| 2480 | entries = 0; |
| 2481 | spltrel->size = entries * sizeof (Elf64_External_Rela); |
| 2482 | |
| 2483 | /* When using the secureplt, we need two words somewhere in the data |
| 2484 | segment for the dynamic linker to tell us where to go. This is the |
| 2485 | entire contents of the .got.plt section. */ |
| 2486 | if (elf64_alpha_use_secureplt) |
| 2487 | { |
| 2488 | sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 2489 | sgotplt->size = entries ? 16 : 0; |
| 2490 | } |
| 2491 | |
| 2492 | return TRUE; |
| 2493 | } |
| 2494 | |
| 2495 | static bfd_boolean |
| 2496 | elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 2497 | struct bfd_link_info *info) |
| 2498 | { |
| 2499 | bfd *i; |
| 2500 | |
| 2501 | if (info->relocatable) |
| 2502 | return TRUE; |
| 2503 | |
| 2504 | /* First, take care of the indirect symbols created by versioning. */ |
| 2505 | alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), |
| 2506 | elf64_alpha_merge_ind_symbols, |
| 2507 | NULL); |
| 2508 | |
| 2509 | if (!elf64_alpha_size_got_sections (info)) |
| 2510 | return FALSE; |
| 2511 | |
| 2512 | /* Allocate space for all of the .got subsections. */ |
| 2513 | i = alpha_elf_hash_table (info)->got_list; |
| 2514 | for ( ; i ; i = alpha_elf_tdata(i)->got_link_next) |
| 2515 | { |
| 2516 | asection *s = alpha_elf_tdata(i)->got; |
| 2517 | if (s->size > 0) |
| 2518 | { |
| 2519 | s->contents = (bfd_byte *) bfd_zalloc (i, s->size); |
| 2520 | if (s->contents == NULL) |
| 2521 | return FALSE; |
| 2522 | } |
| 2523 | } |
| 2524 | |
| 2525 | return TRUE; |
| 2526 | } |
| 2527 | |
| 2528 | /* The number of dynamic relocations required by a static relocation. */ |
| 2529 | |
| 2530 | static int |
| 2531 | alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared) |
| 2532 | { |
| 2533 | switch (r_type) |
| 2534 | { |
| 2535 | /* May appear in GOT entries. */ |
| 2536 | case R_ALPHA_TLSGD: |
| 2537 | return (dynamic ? 2 : shared ? 1 : 0); |
| 2538 | case R_ALPHA_TLSLDM: |
| 2539 | return shared; |
| 2540 | case R_ALPHA_LITERAL: |
| 2541 | case R_ALPHA_GOTTPREL: |
| 2542 | return dynamic || shared; |
| 2543 | case R_ALPHA_GOTDTPREL: |
| 2544 | return dynamic; |
| 2545 | |
| 2546 | /* May appear in data sections. */ |
| 2547 | case R_ALPHA_REFLONG: |
| 2548 | case R_ALPHA_REFQUAD: |
| 2549 | case R_ALPHA_TPREL64: |
| 2550 | return dynamic || shared; |
| 2551 | |
| 2552 | /* Everything else is illegal. We'll issue an error during |
| 2553 | relocate_section. */ |
| 2554 | default: |
| 2555 | return 0; |
| 2556 | } |
| 2557 | } |
| 2558 | |
| 2559 | /* Work out the sizes of the dynamic relocation entries. */ |
| 2560 | |
| 2561 | static bfd_boolean |
| 2562 | elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry *h, |
| 2563 | struct bfd_link_info *info) |
| 2564 | { |
| 2565 | bfd_boolean dynamic; |
| 2566 | struct alpha_elf_reloc_entry *relent; |
| 2567 | unsigned long entries; |
| 2568 | |
| 2569 | if (h->root.root.type == bfd_link_hash_warning) |
| 2570 | h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; |
| 2571 | |
| 2572 | /* If the symbol was defined as a common symbol in a regular object |
| 2573 | file, and there was no definition in any dynamic object, then the |
| 2574 | linker will have allocated space for the symbol in a common |
| 2575 | section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been |
| 2576 | set. This is done for dynamic symbols in |
| 2577 | elf_adjust_dynamic_symbol but this is not done for non-dynamic |
| 2578 | symbols, somehow. */ |
| 2579 | if (!h->root.def_regular |
| 2580 | && h->root.ref_regular |
| 2581 | && !h->root.def_dynamic |
| 2582 | && (h->root.root.type == bfd_link_hash_defined |
| 2583 | || h->root.root.type == bfd_link_hash_defweak) |
| 2584 | && !(h->root.root.u.def.section->owner->flags & DYNAMIC)) |
| 2585 | h->root.def_regular = 1; |
| 2586 | |
| 2587 | /* If the symbol is dynamic, we'll need all the relocations in their |
| 2588 | natural form. If this is a shared object, and it has been forced |
| 2589 | local, we'll need the same number of RELATIVE relocations. */ |
| 2590 | dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); |
| 2591 | |
| 2592 | /* If the symbol is a hidden undefined weak, then we never have any |
| 2593 | relocations. Avoid the loop which may want to add RELATIVE relocs |
| 2594 | based on info->shared. */ |
| 2595 | if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) |
| 2596 | return TRUE; |
| 2597 | |
| 2598 | for (relent = h->reloc_entries; relent; relent = relent->next) |
| 2599 | { |
| 2600 | entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic, |
| 2601 | info->shared); |
| 2602 | if (entries) |
| 2603 | { |
| 2604 | relent->srel->size += |
| 2605 | entries * sizeof (Elf64_External_Rela) * relent->count; |
| 2606 | if (relent->reltext) |
| 2607 | info->flags |= DT_TEXTREL; |
| 2608 | } |
| 2609 | } |
| 2610 | |
| 2611 | return TRUE; |
| 2612 | } |
| 2613 | |
| 2614 | /* Subroutine of elf64_alpha_size_rela_got_section for doing the |
| 2615 | global symbols. */ |
| 2616 | |
| 2617 | static bfd_boolean |
| 2618 | elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry *h, |
| 2619 | struct bfd_link_info *info) |
| 2620 | { |
| 2621 | bfd_boolean dynamic; |
| 2622 | struct alpha_elf_got_entry *gotent; |
| 2623 | unsigned long entries; |
| 2624 | |
| 2625 | if (h->root.root.type == bfd_link_hash_warning) |
| 2626 | h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; |
| 2627 | |
| 2628 | /* If we're using a plt for this symbol, then all of its relocations |
| 2629 | for its got entries go into .rela.plt. */ |
| 2630 | if (h->root.needs_plt) |
| 2631 | return TRUE; |
| 2632 | |
| 2633 | /* If the symbol is dynamic, we'll need all the relocations in their |
| 2634 | natural form. If this is a shared object, and it has been forced |
| 2635 | local, we'll need the same number of RELATIVE relocations. */ |
| 2636 | dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); |
| 2637 | |
| 2638 | /* If the symbol is a hidden undefined weak, then we never have any |
| 2639 | relocations. Avoid the loop which may want to add RELATIVE relocs |
| 2640 | based on info->shared. */ |
| 2641 | if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) |
| 2642 | return TRUE; |
| 2643 | |
| 2644 | entries = 0; |
| 2645 | for (gotent = h->got_entries; gotent ; gotent = gotent->next) |
| 2646 | if (gotent->use_count > 0) |
| 2647 | entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type, |
| 2648 | dynamic, info->shared); |
| 2649 | |
| 2650 | if (entries > 0) |
| 2651 | { |
| 2652 | bfd *dynobj = elf_hash_table(info)->dynobj; |
| 2653 | asection *srel = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2654 | BFD_ASSERT (srel != NULL); |
| 2655 | srel->size += sizeof (Elf64_External_Rela) * entries; |
| 2656 | } |
| 2657 | |
| 2658 | return TRUE; |
| 2659 | } |
| 2660 | |
| 2661 | /* Set the sizes of the dynamic relocation sections. */ |
| 2662 | |
| 2663 | static bfd_boolean |
| 2664 | elf64_alpha_size_rela_got_section (struct bfd_link_info *info) |
| 2665 | { |
| 2666 | unsigned long entries; |
| 2667 | bfd *i, *dynobj; |
| 2668 | asection *srel; |
| 2669 | |
| 2670 | /* Shared libraries often require RELATIVE relocs, and some relocs |
| 2671 | require attention for the main application as well. */ |
| 2672 | |
| 2673 | entries = 0; |
| 2674 | for (i = alpha_elf_hash_table(info)->got_list; |
| 2675 | i ; i = alpha_elf_tdata(i)->got_link_next) |
| 2676 | { |
| 2677 | bfd *j; |
| 2678 | |
| 2679 | for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) |
| 2680 | { |
| 2681 | struct alpha_elf_got_entry **local_got_entries, *gotent; |
| 2682 | int k, n; |
| 2683 | |
| 2684 | local_got_entries = alpha_elf_tdata(j)->local_got_entries; |
| 2685 | if (!local_got_entries) |
| 2686 | continue; |
| 2687 | |
| 2688 | for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) |
| 2689 | for (gotent = local_got_entries[k]; |
| 2690 | gotent ; gotent = gotent->next) |
| 2691 | if (gotent->use_count > 0) |
| 2692 | entries += (alpha_dynamic_entries_for_reloc |
| 2693 | (gotent->reloc_type, 0, info->shared)); |
| 2694 | } |
| 2695 | } |
| 2696 | |
| 2697 | dynobj = elf_hash_table(info)->dynobj; |
| 2698 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2699 | if (!srel) |
| 2700 | { |
| 2701 | BFD_ASSERT (entries == 0); |
| 2702 | return TRUE; |
| 2703 | } |
| 2704 | srel->size = sizeof (Elf64_External_Rela) * entries; |
| 2705 | |
| 2706 | /* Now do the non-local symbols. */ |
| 2707 | alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), |
| 2708 | elf64_alpha_size_rela_got_1, info); |
| 2709 | |
| 2710 | return TRUE; |
| 2711 | } |
| 2712 | |
| 2713 | /* Set the sizes of the dynamic sections. */ |
| 2714 | |
| 2715 | static bfd_boolean |
| 2716 | elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 2717 | struct bfd_link_info *info) |
| 2718 | { |
| 2719 | bfd *dynobj; |
| 2720 | asection *s; |
| 2721 | bfd_boolean relplt; |
| 2722 | |
| 2723 | dynobj = elf_hash_table(info)->dynobj; |
| 2724 | BFD_ASSERT(dynobj != NULL); |
| 2725 | |
| 2726 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2727 | { |
| 2728 | /* Set the contents of the .interp section to the interpreter. */ |
| 2729 | if (info->executable) |
| 2730 | { |
| 2731 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 2732 | BFD_ASSERT (s != NULL); |
| 2733 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 2734 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 2735 | } |
| 2736 | |
| 2737 | /* Now that we've seen all of the input files, we can decide which |
| 2738 | symbols need dynamic relocation entries and which don't. We've |
| 2739 | collected information in check_relocs that we can now apply to |
| 2740 | size the dynamic relocation sections. */ |
| 2741 | alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), |
| 2742 | elf64_alpha_calc_dynrel_sizes, info); |
| 2743 | |
| 2744 | elf64_alpha_size_rela_got_section (info); |
| 2745 | elf64_alpha_size_plt_section (info); |
| 2746 | } |
| 2747 | /* else we're not dynamic and by definition we don't need such things. */ |
| 2748 | |
| 2749 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 2750 | determined the sizes of the various dynamic sections. Allocate |
| 2751 | memory for them. */ |
| 2752 | relplt = FALSE; |
| 2753 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 2754 | { |
| 2755 | const char *name; |
| 2756 | |
| 2757 | if (!(s->flags & SEC_LINKER_CREATED)) |
| 2758 | continue; |
| 2759 | |
| 2760 | /* It's OK to base decisions on the section name, because none |
| 2761 | of the dynobj section names depend upon the input files. */ |
| 2762 | name = bfd_get_section_name (dynobj, s); |
| 2763 | |
| 2764 | if (CONST_STRNEQ (name, ".rela")) |
| 2765 | { |
| 2766 | if (s->size != 0) |
| 2767 | { |
| 2768 | if (strcmp (name, ".rela.plt") == 0) |
| 2769 | relplt = TRUE; |
| 2770 | |
| 2771 | /* We use the reloc_count field as a counter if we need |
| 2772 | to copy relocs into the output file. */ |
| 2773 | s->reloc_count = 0; |
| 2774 | } |
| 2775 | } |
| 2776 | else if (! CONST_STRNEQ (name, ".got") |
| 2777 | && strcmp (name, ".plt") != 0 |
| 2778 | && strcmp (name, ".dynbss") != 0) |
| 2779 | { |
| 2780 | /* It's not one of our dynamic sections, so don't allocate space. */ |
| 2781 | continue; |
| 2782 | } |
| 2783 | |
| 2784 | if (s->size == 0) |
| 2785 | { |
| 2786 | /* If we don't need this section, strip it from the output file. |
| 2787 | This is to handle .rela.bss and .rela.plt. We must create it |
| 2788 | in create_dynamic_sections, because it must be created before |
| 2789 | the linker maps input sections to output sections. The |
| 2790 | linker does that before adjust_dynamic_symbol is called, and |
| 2791 | it is that function which decides whether anything needs to |
| 2792 | go into these sections. */ |
| 2793 | s->flags |= SEC_EXCLUDE; |
| 2794 | } |
| 2795 | else if ((s->flags & SEC_HAS_CONTENTS) != 0) |
| 2796 | { |
| 2797 | /* Allocate memory for the section contents. */ |
| 2798 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 2799 | if (s->contents == NULL) |
| 2800 | return FALSE; |
| 2801 | } |
| 2802 | } |
| 2803 | |
| 2804 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2805 | { |
| 2806 | /* Add some entries to the .dynamic section. We fill in the |
| 2807 | values later, in elf64_alpha_finish_dynamic_sections, but we |
| 2808 | must add the entries now so that we get the correct size for |
| 2809 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 2810 | dynamic linker and used by the debugger. */ |
| 2811 | #define add_dynamic_entry(TAG, VAL) \ |
| 2812 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 2813 | |
| 2814 | if (info->executable) |
| 2815 | { |
| 2816 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 2817 | return FALSE; |
| 2818 | } |
| 2819 | |
| 2820 | if (relplt) |
| 2821 | { |
| 2822 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 2823 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 2824 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 2825 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 2826 | return FALSE; |
| 2827 | |
| 2828 | if (elf64_alpha_use_secureplt |
| 2829 | && !add_dynamic_entry (DT_ALPHA_PLTRO, 1)) |
| 2830 | return FALSE; |
| 2831 | } |
| 2832 | |
| 2833 | if (!add_dynamic_entry (DT_RELA, 0) |
| 2834 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 2835 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) |
| 2836 | return FALSE; |
| 2837 | |
| 2838 | if (info->flags & DF_TEXTREL) |
| 2839 | { |
| 2840 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 2841 | return FALSE; |
| 2842 | } |
| 2843 | } |
| 2844 | #undef add_dynamic_entry |
| 2845 | |
| 2846 | return TRUE; |
| 2847 | } |
| 2848 | \f |
| 2849 | /* These functions do relaxation for Alpha ELF. |
| 2850 | |
| 2851 | Currently I'm only handling what I can do with existing compiler |
| 2852 | and assembler support, which means no instructions are removed, |
| 2853 | though some may be nopped. At this time GCC does not emit enough |
| 2854 | information to do all of the relaxing that is possible. It will |
| 2855 | take some not small amount of work for that to happen. |
| 2856 | |
| 2857 | There are a couple of interesting papers that I once read on this |
| 2858 | subject, that I cannot find references to at the moment, that |
| 2859 | related to Alpha in particular. They are by David Wall, then of |
| 2860 | DEC WRL. */ |
| 2861 | |
| 2862 | struct alpha_relax_info |
| 2863 | { |
| 2864 | bfd *abfd; |
| 2865 | asection *sec; |
| 2866 | bfd_byte *contents; |
| 2867 | Elf_Internal_Shdr *symtab_hdr; |
| 2868 | Elf_Internal_Rela *relocs, *relend; |
| 2869 | struct bfd_link_info *link_info; |
| 2870 | bfd_vma gp; |
| 2871 | bfd *gotobj; |
| 2872 | asection *tsec; |
| 2873 | struct alpha_elf_link_hash_entry *h; |
| 2874 | struct alpha_elf_got_entry **first_gotent; |
| 2875 | struct alpha_elf_got_entry *gotent; |
| 2876 | bfd_boolean changed_contents; |
| 2877 | bfd_boolean changed_relocs; |
| 2878 | unsigned char other; |
| 2879 | }; |
| 2880 | |
| 2881 | static Elf_Internal_Rela * |
| 2882 | elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela *rel, |
| 2883 | Elf_Internal_Rela *relend, |
| 2884 | bfd_vma offset, int type) |
| 2885 | { |
| 2886 | while (rel < relend) |
| 2887 | { |
| 2888 | if (rel->r_offset == offset |
| 2889 | && ELF64_R_TYPE (rel->r_info) == (unsigned int) type) |
| 2890 | return rel; |
| 2891 | ++rel; |
| 2892 | } |
| 2893 | return NULL; |
| 2894 | } |
| 2895 | |
| 2896 | static bfd_boolean |
| 2897 | elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval, |
| 2898 | Elf_Internal_Rela *irel, unsigned long r_type) |
| 2899 | { |
| 2900 | unsigned int insn; |
| 2901 | bfd_signed_vma disp; |
| 2902 | |
| 2903 | /* Get the instruction. */ |
| 2904 | insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); |
| 2905 | |
| 2906 | if (insn >> 26 != OP_LDQ) |
| 2907 | { |
| 2908 | reloc_howto_type *howto = elf64_alpha_howto_table + r_type; |
| 2909 | ((*_bfd_error_handler) |
| 2910 | ("%B: %A+0x%lx: warning: %s relocation against unexpected insn", |
| 2911 | info->abfd, info->sec, |
| 2912 | (unsigned long) irel->r_offset, howto->name)); |
| 2913 | return TRUE; |
| 2914 | } |
| 2915 | |
| 2916 | /* Can't relax dynamic symbols. */ |
| 2917 | if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) |
| 2918 | return TRUE; |
| 2919 | |
| 2920 | /* Can't use local-exec relocations in shared libraries. */ |
| 2921 | if (r_type == R_ALPHA_GOTTPREL && info->link_info->shared) |
| 2922 | return TRUE; |
| 2923 | |
| 2924 | if (r_type == R_ALPHA_LITERAL) |
| 2925 | { |
| 2926 | /* Look for nice constant addresses. This includes the not-uncommon |
| 2927 | special case of 0 for undefweak symbols. */ |
| 2928 | if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak) |
| 2929 | || (!info->link_info->shared |
| 2930 | && (symval >= (bfd_vma)-0x8000 || symval < 0x8000))) |
| 2931 | { |
| 2932 | disp = 0; |
| 2933 | insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); |
| 2934 | insn |= (symval & 0xffff); |
| 2935 | r_type = R_ALPHA_NONE; |
| 2936 | } |
| 2937 | else |
| 2938 | { |
| 2939 | disp = symval - info->gp; |
| 2940 | insn = (OP_LDA << 26) | (insn & 0x03ff0000); |
| 2941 | r_type = R_ALPHA_GPREL16; |
| 2942 | } |
| 2943 | } |
| 2944 | else |
| 2945 | { |
| 2946 | bfd_vma dtp_base, tp_base; |
| 2947 | |
| 2948 | BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); |
| 2949 | dtp_base = alpha_get_dtprel_base (info->link_info); |
| 2950 | tp_base = alpha_get_tprel_base (info->link_info); |
| 2951 | disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base); |
| 2952 | |
| 2953 | insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); |
| 2954 | |
| 2955 | switch (r_type) |
| 2956 | { |
| 2957 | case R_ALPHA_GOTDTPREL: |
| 2958 | r_type = R_ALPHA_DTPREL16; |
| 2959 | break; |
| 2960 | case R_ALPHA_GOTTPREL: |
| 2961 | r_type = R_ALPHA_TPREL16; |
| 2962 | break; |
| 2963 | default: |
| 2964 | BFD_ASSERT (0); |
| 2965 | return FALSE; |
| 2966 | } |
| 2967 | } |
| 2968 | |
| 2969 | if (disp < -0x8000 || disp >= 0x8000) |
| 2970 | return TRUE; |
| 2971 | |
| 2972 | bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset); |
| 2973 | info->changed_contents = TRUE; |
| 2974 | |
| 2975 | /* Reduce the use count on this got entry by one, possibly |
| 2976 | eliminating it. */ |
| 2977 | if (--info->gotent->use_count == 0) |
| 2978 | { |
| 2979 | int sz = alpha_got_entry_size (r_type); |
| 2980 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; |
| 2981 | if (!info->h) |
| 2982 | alpha_elf_tdata (info->gotobj)->local_got_size -= sz; |
| 2983 | } |
| 2984 | |
| 2985 | /* Smash the existing GOT relocation for its 16-bit immediate pair. */ |
| 2986 | irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type); |
| 2987 | info->changed_relocs = TRUE; |
| 2988 | |
| 2989 | /* ??? Search forward through this basic block looking for insns |
| 2990 | that use the target register. Stop after an insn modifying the |
| 2991 | register is seen, or after a branch or call. |
| 2992 | |
| 2993 | Any such memory load insn may be substituted by a load directly |
| 2994 | off the GP. This allows the memory load insn to be issued before |
| 2995 | the calculated GP register would otherwise be ready. |
| 2996 | |
| 2997 | Any such jsr insn can be replaced by a bsr if it is in range. |
| 2998 | |
| 2999 | This would mean that we'd have to _add_ relocations, the pain of |
| 3000 | which gives one pause. */ |
| 3001 | |
| 3002 | return TRUE; |
| 3003 | } |
| 3004 | |
| 3005 | static bfd_vma |
| 3006 | elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval) |
| 3007 | { |
| 3008 | /* If the function has the same gp, and we can identify that the |
| 3009 | function does not use its function pointer, we can eliminate the |
| 3010 | address load. */ |
| 3011 | |
| 3012 | /* If the symbol is marked NOPV, we are being told the function never |
| 3013 | needs its procedure value. */ |
| 3014 | if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV) |
| 3015 | return symval; |
| 3016 | |
| 3017 | /* If the symbol is marked STD_GP, we are being told the function does |
| 3018 | a normal ldgp in the first two words. */ |
| 3019 | else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD) |
| 3020 | ; |
| 3021 | |
| 3022 | /* Otherwise, we may be able to identify a GP load in the first two |
| 3023 | words, which we can then skip. */ |
| 3024 | else |
| 3025 | { |
| 3026 | Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp; |
| 3027 | bfd_vma ofs; |
| 3028 | |
| 3029 | /* Load the relocations from the section that the target symbol is in. */ |
| 3030 | if (info->sec == info->tsec) |
| 3031 | { |
| 3032 | tsec_relocs = info->relocs; |
| 3033 | tsec_relend = info->relend; |
| 3034 | tsec_free = NULL; |
| 3035 | } |
| 3036 | else |
| 3037 | { |
| 3038 | tsec_relocs = (_bfd_elf_link_read_relocs |
| 3039 | (info->abfd, info->tsec, (PTR) NULL, |
| 3040 | (Elf_Internal_Rela *) NULL, |
| 3041 | info->link_info->keep_memory)); |
| 3042 | if (tsec_relocs == NULL) |
| 3043 | return 0; |
| 3044 | tsec_relend = tsec_relocs + info->tsec->reloc_count; |
| 3045 | tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs); |
| 3046 | } |
| 3047 | |
| 3048 | /* Recover the symbol's offset within the section. */ |
| 3049 | ofs = (symval - info->tsec->output_section->vma |
| 3050 | - info->tsec->output_offset); |
| 3051 | |
| 3052 | /* Look for a GPDISP reloc. */ |
| 3053 | gpdisp = (elf64_alpha_find_reloc_at_ofs |
| 3054 | (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP)); |
| 3055 | |
| 3056 | if (!gpdisp || gpdisp->r_addend != 4) |
| 3057 | { |
| 3058 | if (tsec_free) |
| 3059 | free (tsec_free); |
| 3060 | return 0; |
| 3061 | } |
| 3062 | if (tsec_free) |
| 3063 | free (tsec_free); |
| 3064 | } |
| 3065 | |
| 3066 | /* We've now determined that we can skip an initial gp load. Verify |
| 3067 | that the call and the target use the same gp. */ |
| 3068 | if (info->link_info->hash->creator != info->tsec->owner->xvec |
| 3069 | || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj) |
| 3070 | return 0; |
| 3071 | |
| 3072 | return symval + 8; |
| 3073 | } |
| 3074 | |
| 3075 | static bfd_boolean |
| 3076 | elf64_alpha_relax_with_lituse (struct alpha_relax_info *info, |
| 3077 | bfd_vma symval, Elf_Internal_Rela *irel) |
| 3078 | { |
| 3079 | Elf_Internal_Rela *urel, *irelend = info->relend; |
| 3080 | int flags, count, i; |
| 3081 | bfd_signed_vma disp; |
| 3082 | bfd_boolean fits16; |
| 3083 | bfd_boolean fits32; |
| 3084 | bfd_boolean lit_reused = FALSE; |
| 3085 | bfd_boolean all_optimized = TRUE; |
| 3086 | unsigned int lit_insn; |
| 3087 | |
| 3088 | lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); |
| 3089 | if (lit_insn >> 26 != OP_LDQ) |
| 3090 | { |
| 3091 | ((*_bfd_error_handler) |
| 3092 | ("%B: %A+0x%lx: warning: LITERAL relocation against unexpected insn", |
| 3093 | info->abfd, info->sec, |
| 3094 | (unsigned long) irel->r_offset)); |
| 3095 | return TRUE; |
| 3096 | } |
| 3097 | |
| 3098 | /* Can't relax dynamic symbols. */ |
| 3099 | if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) |
| 3100 | return TRUE; |
| 3101 | |
| 3102 | /* Summarize how this particular LITERAL is used. */ |
| 3103 | for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count) |
| 3104 | { |
| 3105 | if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE) |
| 3106 | break; |
| 3107 | if (urel->r_addend <= 6) |
| 3108 | flags |= 1 << urel->r_addend; |
| 3109 | } |
| 3110 | |
| 3111 | /* A little preparation for the loop... */ |
| 3112 | disp = symval - info->gp; |
| 3113 | |
| 3114 | for (urel = irel+1, i = 0; i < count; ++i, ++urel) |
| 3115 | { |
| 3116 | unsigned int insn; |
| 3117 | int insn_disp; |
| 3118 | bfd_signed_vma xdisp; |
| 3119 | |
| 3120 | insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset); |
| 3121 | |
| 3122 | switch (urel->r_addend) |
| 3123 | { |
| 3124 | case LITUSE_ALPHA_ADDR: |
| 3125 | default: |
| 3126 | /* This type is really just a placeholder to note that all |
| 3127 | uses cannot be optimized, but to still allow some. */ |
| 3128 | all_optimized = FALSE; |
| 3129 | break; |
| 3130 | |
| 3131 | case LITUSE_ALPHA_BASE: |
| 3132 | /* We can always optimize 16-bit displacements. */ |
| 3133 | |
| 3134 | /* Extract the displacement from the instruction, sign-extending |
| 3135 | it if necessary, then test whether it is within 16 or 32 bits |
| 3136 | displacement from GP. */ |
| 3137 | insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000; |
| 3138 | |
| 3139 | xdisp = disp + insn_disp; |
| 3140 | fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000); |
| 3141 | fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 |
| 3142 | && xdisp < 0x7fff8000); |
| 3143 | |
| 3144 | if (fits16) |
| 3145 | { |
| 3146 | /* Take the op code and dest from this insn, take the base |
| 3147 | register from the literal insn. Leave the offset alone. */ |
| 3148 | insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000); |
| 3149 | urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
| 3150 | R_ALPHA_GPREL16); |
| 3151 | urel->r_addend = irel->r_addend; |
| 3152 | info->changed_relocs = TRUE; |
| 3153 | |
| 3154 | bfd_put_32 (info->abfd, (bfd_vma) insn, |
| 3155 | info->contents + urel->r_offset); |
| 3156 | info->changed_contents = TRUE; |
| 3157 | } |
| 3158 | |
| 3159 | /* If all mem+byte, we can optimize 32-bit mem displacements. */ |
| 3160 | else if (fits32 && !(flags & ~6)) |
| 3161 | { |
| 3162 | /* FIXME: sanity check that lit insn Ra is mem insn Rb. */ |
| 3163 | |
| 3164 | irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
| 3165 | R_ALPHA_GPRELHIGH); |
| 3166 | lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000); |
| 3167 | bfd_put_32 (info->abfd, (bfd_vma) lit_insn, |
| 3168 | info->contents + irel->r_offset); |
| 3169 | lit_reused = TRUE; |
| 3170 | info->changed_contents = TRUE; |
| 3171 | |
| 3172 | urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
| 3173 | R_ALPHA_GPRELLOW); |
| 3174 | urel->r_addend = irel->r_addend; |
| 3175 | info->changed_relocs = TRUE; |
| 3176 | } |
| 3177 | else |
| 3178 | all_optimized = FALSE; |
| 3179 | break; |
| 3180 | |
| 3181 | case LITUSE_ALPHA_BYTOFF: |
| 3182 | /* We can always optimize byte instructions. */ |
| 3183 | |
| 3184 | /* FIXME: sanity check the insn for byte op. Check that the |
| 3185 | literal dest reg is indeed Rb in the byte insn. */ |
| 3186 | |
| 3187 | insn &= ~ (unsigned) 0x001ff000; |
| 3188 | insn |= ((symval & 7) << 13) | 0x1000; |
| 3189 | |
| 3190 | urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 3191 | urel->r_addend = 0; |
| 3192 | info->changed_relocs = TRUE; |
| 3193 | |
| 3194 | bfd_put_32 (info->abfd, (bfd_vma) insn, |
| 3195 | info->contents + urel->r_offset); |
| 3196 | info->changed_contents = TRUE; |
| 3197 | break; |
| 3198 | |
| 3199 | case LITUSE_ALPHA_JSR: |
| 3200 | case LITUSE_ALPHA_TLSGD: |
| 3201 | case LITUSE_ALPHA_TLSLDM: |
| 3202 | case LITUSE_ALPHA_JSRDIRECT: |
| 3203 | { |
| 3204 | bfd_vma optdest, org; |
| 3205 | bfd_signed_vma odisp; |
| 3206 | |
| 3207 | /* For undefined weak symbols, we're mostly interested in getting |
| 3208 | rid of the got entry whenever possible, so optimize this to a |
| 3209 | use of the zero register. */ |
| 3210 | if (info->h && info->h->root.root.type == bfd_link_hash_undefweak) |
| 3211 | { |
| 3212 | insn |= 31 << 16; |
| 3213 | bfd_put_32 (info->abfd, (bfd_vma) insn, |
| 3214 | info->contents + urel->r_offset); |
| 3215 | |
| 3216 | info->changed_contents = TRUE; |
| 3217 | break; |
| 3218 | } |
| 3219 | |
| 3220 | /* If not zero, place to jump without needing pv. */ |
| 3221 | optdest = elf64_alpha_relax_opt_call (info, symval); |
| 3222 | org = (info->sec->output_section->vma |
| 3223 | + info->sec->output_offset |
| 3224 | + urel->r_offset + 4); |
| 3225 | odisp = (optdest ? optdest : symval) - org; |
| 3226 | |
| 3227 | if (odisp >= -0x400000 && odisp < 0x400000) |
| 3228 | { |
| 3229 | Elf_Internal_Rela *xrel; |
| 3230 | |
| 3231 | /* Preserve branch prediction call stack when possible. */ |
| 3232 | if ((insn & INSN_JSR_MASK) == INSN_JSR) |
| 3233 | insn = (OP_BSR << 26) | (insn & 0x03e00000); |
| 3234 | else |
| 3235 | insn = (OP_BR << 26) | (insn & 0x03e00000); |
| 3236 | |
| 3237 | urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
| 3238 | R_ALPHA_BRADDR); |
| 3239 | urel->r_addend = irel->r_addend; |
| 3240 | |
| 3241 | if (optdest) |
| 3242 | urel->r_addend += optdest - symval; |
| 3243 | else |
| 3244 | all_optimized = FALSE; |
| 3245 | |
| 3246 | bfd_put_32 (info->abfd, (bfd_vma) insn, |
| 3247 | info->contents + urel->r_offset); |
| 3248 | |
| 3249 | /* Kill any HINT reloc that might exist for this insn. */ |
| 3250 | xrel = (elf64_alpha_find_reloc_at_ofs |
| 3251 | (info->relocs, info->relend, urel->r_offset, |
| 3252 | R_ALPHA_HINT)); |
| 3253 | if (xrel) |
| 3254 | xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 3255 | |
| 3256 | info->changed_contents = TRUE; |
| 3257 | info->changed_relocs = TRUE; |
| 3258 | } |
| 3259 | else |
| 3260 | all_optimized = FALSE; |
| 3261 | |
| 3262 | /* Even if the target is not in range for a direct branch, |
| 3263 | if we share a GP, we can eliminate the gp reload. */ |
| 3264 | if (optdest) |
| 3265 | { |
| 3266 | Elf_Internal_Rela *gpdisp |
| 3267 | = (elf64_alpha_find_reloc_at_ofs |
| 3268 | (info->relocs, irelend, urel->r_offset + 4, |
| 3269 | R_ALPHA_GPDISP)); |
| 3270 | if (gpdisp) |
| 3271 | { |
| 3272 | bfd_byte *p_ldah = info->contents + gpdisp->r_offset; |
| 3273 | bfd_byte *p_lda = p_ldah + gpdisp->r_addend; |
| 3274 | unsigned int ldah = bfd_get_32 (info->abfd, p_ldah); |
| 3275 | unsigned int lda = bfd_get_32 (info->abfd, p_lda); |
| 3276 | |
| 3277 | /* Verify that the instruction is "ldah $29,0($26)". |
| 3278 | Consider a function that ends in a noreturn call, |
| 3279 | and that the next function begins with an ldgp, |
| 3280 | and that by accident there is no padding between. |
| 3281 | In that case the insn would use $27 as the base. */ |
| 3282 | if (ldah == 0x27ba0000 && lda == 0x23bd0000) |
| 3283 | { |
| 3284 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah); |
| 3285 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda); |
| 3286 | |
| 3287 | gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 3288 | info->changed_contents = TRUE; |
| 3289 | info->changed_relocs = TRUE; |
| 3290 | } |
| 3291 | } |
| 3292 | } |
| 3293 | } |
| 3294 | break; |
| 3295 | } |
| 3296 | } |
| 3297 | |
| 3298 | /* If all cases were optimized, we can reduce the use count on this |
| 3299 | got entry by one, possibly eliminating it. */ |
| 3300 | if (all_optimized) |
| 3301 | { |
| 3302 | if (--info->gotent->use_count == 0) |
| 3303 | { |
| 3304 | int sz = alpha_got_entry_size (R_ALPHA_LITERAL); |
| 3305 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; |
| 3306 | if (!info->h) |
| 3307 | alpha_elf_tdata (info->gotobj)->local_got_size -= sz; |
| 3308 | } |
| 3309 | |
| 3310 | /* If the literal instruction is no longer needed (it may have been |
| 3311 | reused. We can eliminate it. */ |
| 3312 | /* ??? For now, I don't want to deal with compacting the section, |
| 3313 | so just nop it out. */ |
| 3314 | if (!lit_reused) |
| 3315 | { |
| 3316 | irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 3317 | info->changed_relocs = TRUE; |
| 3318 | |
| 3319 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, |
| 3320 | info->contents + irel->r_offset); |
| 3321 | info->changed_contents = TRUE; |
| 3322 | } |
| 3323 | |
| 3324 | return TRUE; |
| 3325 | } |
| 3326 | else |
| 3327 | return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL); |
| 3328 | } |
| 3329 | |
| 3330 | static bfd_boolean |
| 3331 | elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval, |
| 3332 | Elf_Internal_Rela *irel, bfd_boolean is_gd) |
| 3333 | { |
| 3334 | bfd_byte *pos[5]; |
| 3335 | unsigned int insn; |
| 3336 | Elf_Internal_Rela *gpdisp, *hint; |
| 3337 | bfd_boolean dynamic, use_gottprel, pos1_unusable; |
| 3338 | unsigned long new_symndx; |
| 3339 | |
| 3340 | dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info); |
| 3341 | |
| 3342 | /* If a TLS symbol is accessed using IE at least once, there is no point |
| 3343 | to use dynamic model for it. */ |
| 3344 | if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE)) |
| 3345 | ; |
| 3346 | |
| 3347 | /* If the symbol is local, and we've already committed to DF_STATIC_TLS, |
| 3348 | then we might as well relax to IE. */ |
| 3349 | else if (info->link_info->shared && !dynamic |
| 3350 | && (info->link_info->flags & DF_STATIC_TLS)) |
| 3351 | ; |
| 3352 | |
| 3353 | /* Otherwise we must be building an executable to do anything. */ |
| 3354 | else if (info->link_info->shared) |
| 3355 | return TRUE; |
| 3356 | |
| 3357 | /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and |
| 3358 | the matching LITUSE_TLS relocations. */ |
| 3359 | if (irel + 2 >= info->relend) |
| 3360 | return TRUE; |
| 3361 | if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL |
| 3362 | || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE |
| 3363 | || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM)) |
| 3364 | return TRUE; |
| 3365 | |
| 3366 | /* There must be a GPDISP relocation positioned immediately after the |
| 3367 | LITUSE relocation. */ |
| 3368 | gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, |
| 3369 | irel[2].r_offset + 4, R_ALPHA_GPDISP); |
| 3370 | if (!gpdisp) |
| 3371 | return TRUE; |
| 3372 | |
| 3373 | pos[0] = info->contents + irel[0].r_offset; |
| 3374 | pos[1] = info->contents + irel[1].r_offset; |
| 3375 | pos[2] = info->contents + irel[2].r_offset; |
| 3376 | pos[3] = info->contents + gpdisp->r_offset; |
| 3377 | pos[4] = pos[3] + gpdisp->r_addend; |
| 3378 | pos1_unusable = FALSE; |
| 3379 | |
| 3380 | /* Generally, the positions are not allowed to be out of order, lest the |
| 3381 | modified insn sequence have different register lifetimes. We can make |
| 3382 | an exception when pos 1 is adjacent to pos 0. */ |
| 3383 | if (pos[1] + 4 == pos[0]) |
| 3384 | { |
| 3385 | bfd_byte *tmp = pos[0]; |
| 3386 | pos[0] = pos[1]; |
| 3387 | pos[1] = tmp; |
| 3388 | } |
| 3389 | else if (pos[1] < pos[0]) |
| 3390 | pos1_unusable = TRUE; |
| 3391 | if (pos[1] >= pos[2] || pos[2] >= pos[3]) |
| 3392 | return TRUE; |
| 3393 | |
| 3394 | /* Reduce the use count on the LITERAL relocation. Do this before we |
| 3395 | smash the symndx when we adjust the relocations below. */ |
| 3396 | { |
| 3397 | struct alpha_elf_got_entry *lit_gotent; |
| 3398 | struct alpha_elf_link_hash_entry *lit_h; |
| 3399 | unsigned long indx; |
| 3400 | |
| 3401 | BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info); |
| 3402 | indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info; |
| 3403 | lit_h = alpha_elf_sym_hashes (info->abfd)[indx]; |
| 3404 | |
| 3405 | while (lit_h->root.root.type == bfd_link_hash_indirect |
| 3406 | || lit_h->root.root.type == bfd_link_hash_warning) |
| 3407 | lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link; |
| 3408 | |
| 3409 | for (lit_gotent = lit_h->got_entries; lit_gotent ; |
| 3410 | lit_gotent = lit_gotent->next) |
| 3411 | if (lit_gotent->gotobj == info->gotobj |
| 3412 | && lit_gotent->reloc_type == R_ALPHA_LITERAL |
| 3413 | && lit_gotent->addend == irel[1].r_addend) |
| 3414 | break; |
| 3415 | BFD_ASSERT (lit_gotent); |
| 3416 | |
| 3417 | if (--lit_gotent->use_count == 0) |
| 3418 | { |
| 3419 | int sz = alpha_got_entry_size (R_ALPHA_LITERAL); |
| 3420 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; |
| 3421 | } |
| 3422 | } |
| 3423 | |
| 3424 | /* Change |
| 3425 | |
| 3426 | lda $16,x($gp) !tlsgd!1 |
| 3427 | ldq $27,__tls_get_addr($gp) !literal!1 |
| 3428 | jsr $26,($27),__tls_get_addr !lituse_tlsgd!1 |
| 3429 | ldah $29,0($26) !gpdisp!2 |
| 3430 | lda $29,0($29) !gpdisp!2 |
| 3431 | to |
| 3432 | ldq $16,x($gp) !gottprel |
| 3433 | unop |
| 3434 | call_pal rduniq |
| 3435 | addq $16,$0,$0 |
| 3436 | unop |
| 3437 | or the first pair to |
| 3438 | lda $16,x($gp) !tprel |
| 3439 | unop |
| 3440 | or |
| 3441 | ldah $16,x($gp) !tprelhi |
| 3442 | lda $16,x($16) !tprello |
| 3443 | |
| 3444 | as appropriate. */ |
| 3445 | |
| 3446 | use_gottprel = FALSE; |
| 3447 | new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : 0; |
| 3448 | switch (!dynamic && !info->link_info->shared) |
| 3449 | { |
| 3450 | case 1: |
| 3451 | { |
| 3452 | bfd_vma tp_base; |
| 3453 | bfd_signed_vma disp; |
| 3454 | |
| 3455 | BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); |
| 3456 | tp_base = alpha_get_tprel_base (info->link_info); |
| 3457 | disp = symval - tp_base; |
| 3458 | |
| 3459 | if (disp >= -0x8000 && disp < 0x8000) |
| 3460 | { |
| 3461 | insn = (OP_LDA << 26) | (16 << 21) | (31 << 16); |
| 3462 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); |
| 3463 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); |
| 3464 | |
| 3465 | irel[0].r_offset = pos[0] - info->contents; |
| 3466 | irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16); |
| 3467 | irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 3468 | break; |
| 3469 | } |
| 3470 | else if (disp >= -(bfd_signed_vma) 0x80000000 |
| 3471 | && disp < (bfd_signed_vma) 0x7fff8000 |
| 3472 | && !pos1_unusable) |
| 3473 | { |
| 3474 | insn = (OP_LDAH << 26) | (16 << 21) | (31 << 16); |
| 3475 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); |
| 3476 | insn = (OP_LDA << 26) | (16 << 21) | (16 << 16); |
| 3477 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]); |
| 3478 | |
| 3479 | irel[0].r_offset = pos[0] - info->contents; |
| 3480 | irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI); |
| 3481 | irel[1].r_offset = pos[1] - info->contents; |
| 3482 | irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO); |
| 3483 | break; |
| 3484 | } |
| 3485 | } |
| 3486 | /* FALLTHRU */ |
| 3487 | |
| 3488 | default: |
| 3489 | use_gottprel = TRUE; |
| 3490 | |
| 3491 | insn = (OP_LDQ << 26) | (16 << 21) | (29 << 16); |
| 3492 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); |
| 3493 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); |
| 3494 | |
| 3495 | irel[0].r_offset = pos[0] - info->contents; |
| 3496 | irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL); |
| 3497 | irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 3498 | break; |
| 3499 | } |
| 3500 | |
| 3501 | bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]); |
| 3502 | |
| 3503 | insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0); |
| 3504 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]); |
| 3505 | |
| 3506 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]); |
| 3507 | |
| 3508 | irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 3509 | gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 3510 | |
| 3511 | hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, |
| 3512 | irel[2].r_offset, R_ALPHA_HINT); |
| 3513 | if (hint) |
| 3514 | hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 3515 | |
| 3516 | info->changed_contents = TRUE; |
| 3517 | info->changed_relocs = TRUE; |
| 3518 | |
| 3519 | /* Reduce the use count on the TLSGD/TLSLDM relocation. */ |
| 3520 | if (--info->gotent->use_count == 0) |
| 3521 | { |
| 3522 | int sz = alpha_got_entry_size (info->gotent->reloc_type); |
| 3523 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; |
| 3524 | if (!info->h) |
| 3525 | alpha_elf_tdata (info->gotobj)->local_got_size -= sz; |
| 3526 | } |
| 3527 | |
| 3528 | /* If we've switched to a GOTTPREL relocation, increment the reference |
| 3529 | count on that got entry. */ |
| 3530 | if (use_gottprel) |
| 3531 | { |
| 3532 | struct alpha_elf_got_entry *tprel_gotent; |
| 3533 | |
| 3534 | for (tprel_gotent = *info->first_gotent; tprel_gotent ; |
| 3535 | tprel_gotent = tprel_gotent->next) |
| 3536 | if (tprel_gotent->gotobj == info->gotobj |
| 3537 | && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL |
| 3538 | && tprel_gotent->addend == irel->r_addend) |
| 3539 | break; |
| 3540 | if (tprel_gotent) |
| 3541 | tprel_gotent->use_count++; |
| 3542 | else |
| 3543 | { |
| 3544 | if (info->gotent->use_count == 0) |
| 3545 | tprel_gotent = info->gotent; |
| 3546 | else |
| 3547 | { |
| 3548 | tprel_gotent = (struct alpha_elf_got_entry *) |
| 3549 | bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry)); |
| 3550 | if (!tprel_gotent) |
| 3551 | return FALSE; |
| 3552 | |
| 3553 | tprel_gotent->next = *info->first_gotent; |
| 3554 | *info->first_gotent = tprel_gotent; |
| 3555 | |
| 3556 | tprel_gotent->gotobj = info->gotobj; |
| 3557 | tprel_gotent->addend = irel->r_addend; |
| 3558 | tprel_gotent->got_offset = -1; |
| 3559 | tprel_gotent->reloc_done = 0; |
| 3560 | tprel_gotent->reloc_xlated = 0; |
| 3561 | } |
| 3562 | |
| 3563 | tprel_gotent->use_count = 1; |
| 3564 | tprel_gotent->reloc_type = R_ALPHA_GOTTPREL; |
| 3565 | } |
| 3566 | } |
| 3567 | |
| 3568 | return TRUE; |
| 3569 | } |
| 3570 | |
| 3571 | static bfd_boolean |
| 3572 | elf64_alpha_relax_section (bfd *abfd, asection *sec, |
| 3573 | struct bfd_link_info *link_info, bfd_boolean *again) |
| 3574 | { |
| 3575 | Elf_Internal_Shdr *symtab_hdr; |
| 3576 | Elf_Internal_Rela *internal_relocs; |
| 3577 | Elf_Internal_Rela *irel, *irelend; |
| 3578 | Elf_Internal_Sym *isymbuf = NULL; |
| 3579 | struct alpha_elf_got_entry **local_got_entries; |
| 3580 | struct alpha_relax_info info; |
| 3581 | |
| 3582 | /* We are not currently changing any sizes, so only one pass. */ |
| 3583 | *again = FALSE; |
| 3584 | |
| 3585 | if (link_info->relocatable |
| 3586 | || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC)) |
| 3587 | != (SEC_CODE | SEC_RELOC | SEC_ALLOC)) |
| 3588 | || sec->reloc_count == 0) |
| 3589 | return TRUE; |
| 3590 | |
| 3591 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 3592 | local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; |
| 3593 | |
| 3594 | /* Load the relocations for this section. */ |
| 3595 | internal_relocs = (_bfd_elf_link_read_relocs |
| 3596 | (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
| 3597 | link_info->keep_memory)); |
| 3598 | if (internal_relocs == NULL) |
| 3599 | return FALSE; |
| 3600 | |
| 3601 | memset(&info, 0, sizeof (info)); |
| 3602 | info.abfd = abfd; |
| 3603 | info.sec = sec; |
| 3604 | info.link_info = link_info; |
| 3605 | info.symtab_hdr = symtab_hdr; |
| 3606 | info.relocs = internal_relocs; |
| 3607 | info.relend = irelend = internal_relocs + sec->reloc_count; |
| 3608 | |
| 3609 | /* Find the GP for this object. Do not store the result back via |
| 3610 | _bfd_set_gp_value, since this could change again before final. */ |
| 3611 | info.gotobj = alpha_elf_tdata (abfd)->gotobj; |
| 3612 | if (info.gotobj) |
| 3613 | { |
| 3614 | asection *sgot = alpha_elf_tdata (info.gotobj)->got; |
| 3615 | info.gp = (sgot->output_section->vma |
| 3616 | + sgot->output_offset |
| 3617 | + 0x8000); |
| 3618 | } |
| 3619 | |
| 3620 | /* Get the section contents. */ |
| 3621 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 3622 | info.contents = elf_section_data (sec)->this_hdr.contents; |
| 3623 | else |
| 3624 | { |
| 3625 | if (!bfd_malloc_and_get_section (abfd, sec, &info.contents)) |
| 3626 | goto error_return; |
| 3627 | } |
| 3628 | |
| 3629 | for (irel = internal_relocs; irel < irelend; irel++) |
| 3630 | { |
| 3631 | bfd_vma symval; |
| 3632 | struct alpha_elf_got_entry *gotent; |
| 3633 | unsigned long r_type = ELF64_R_TYPE (irel->r_info); |
| 3634 | unsigned long r_symndx = ELF64_R_SYM (irel->r_info); |
| 3635 | |
| 3636 | /* Early exit for unhandled or unrelaxable relocations. */ |
| 3637 | switch (r_type) |
| 3638 | { |
| 3639 | case R_ALPHA_LITERAL: |
| 3640 | case R_ALPHA_GPRELHIGH: |
| 3641 | case R_ALPHA_GPRELLOW: |
| 3642 | case R_ALPHA_GOTDTPREL: |
| 3643 | case R_ALPHA_GOTTPREL: |
| 3644 | case R_ALPHA_TLSGD: |
| 3645 | break; |
| 3646 | |
| 3647 | case R_ALPHA_TLSLDM: |
| 3648 | /* The symbol for a TLSLDM reloc is ignored. Collapse the |
| 3649 | reloc to the 0 symbol so that they all match. */ |
| 3650 | r_symndx = 0; |
| 3651 | break; |
| 3652 | |
| 3653 | default: |
| 3654 | continue; |
| 3655 | } |
| 3656 | |
| 3657 | /* Get the value of the symbol referred to by the reloc. */ |
| 3658 | if (r_symndx < symtab_hdr->sh_info) |
| 3659 | { |
| 3660 | /* A local symbol. */ |
| 3661 | Elf_Internal_Sym *isym; |
| 3662 | |
| 3663 | /* Read this BFD's local symbols. */ |
| 3664 | if (isymbuf == NULL) |
| 3665 | { |
| 3666 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 3667 | if (isymbuf == NULL) |
| 3668 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 3669 | symtab_hdr->sh_info, 0, |
| 3670 | NULL, NULL, NULL); |
| 3671 | if (isymbuf == NULL) |
| 3672 | goto error_return; |
| 3673 | } |
| 3674 | |
| 3675 | isym = isymbuf + r_symndx; |
| 3676 | |
| 3677 | /* Given the symbol for a TLSLDM reloc is ignored, this also |
| 3678 | means forcing the symbol value to the tp base. */ |
| 3679 | if (r_type == R_ALPHA_TLSLDM) |
| 3680 | { |
| 3681 | info.tsec = bfd_abs_section_ptr; |
| 3682 | symval = alpha_get_tprel_base (info.link_info); |
| 3683 | } |
| 3684 | else |
| 3685 | { |
| 3686 | symval = isym->st_value; |
| 3687 | if (isym->st_shndx == SHN_UNDEF) |
| 3688 | continue; |
| 3689 | else if (isym->st_shndx == SHN_ABS) |
| 3690 | info.tsec = bfd_abs_section_ptr; |
| 3691 | else if (isym->st_shndx == SHN_COMMON) |
| 3692 | info.tsec = bfd_com_section_ptr; |
| 3693 | else |
| 3694 | info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 3695 | } |
| 3696 | |
| 3697 | info.h = NULL; |
| 3698 | info.other = isym->st_other; |
| 3699 | if (local_got_entries) |
| 3700 | info.first_gotent = &local_got_entries[r_symndx]; |
| 3701 | else |
| 3702 | { |
| 3703 | info.first_gotent = &info.gotent; |
| 3704 | info.gotent = NULL; |
| 3705 | } |
| 3706 | } |
| 3707 | else |
| 3708 | { |
| 3709 | unsigned long indx; |
| 3710 | struct alpha_elf_link_hash_entry *h; |
| 3711 | |
| 3712 | indx = r_symndx - symtab_hdr->sh_info; |
| 3713 | h = alpha_elf_sym_hashes (abfd)[indx]; |
| 3714 | BFD_ASSERT (h != NULL); |
| 3715 | |
| 3716 | while (h->root.root.type == bfd_link_hash_indirect |
| 3717 | || h->root.root.type == bfd_link_hash_warning) |
| 3718 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
| 3719 | |
| 3720 | /* If the symbol is undefined, we can't do anything with it. */ |
| 3721 | if (h->root.root.type == bfd_link_hash_undefined) |
| 3722 | continue; |
| 3723 | |
| 3724 | /* If the symbol isn't defined in the current module, |
| 3725 | again we can't do anything. */ |
| 3726 | if (h->root.root.type == bfd_link_hash_undefweak) |
| 3727 | { |
| 3728 | info.tsec = bfd_abs_section_ptr; |
| 3729 | symval = 0; |
| 3730 | } |
| 3731 | else if (!h->root.def_regular) |
| 3732 | { |
| 3733 | /* Except for TLSGD relocs, which can sometimes be |
| 3734 | relaxed to GOTTPREL relocs. */ |
| 3735 | if (r_type != R_ALPHA_TLSGD) |
| 3736 | continue; |
| 3737 | info.tsec = bfd_abs_section_ptr; |
| 3738 | symval = 0; |
| 3739 | } |
| 3740 | else |
| 3741 | { |
| 3742 | info.tsec = h->root.root.u.def.section; |
| 3743 | symval = h->root.root.u.def.value; |
| 3744 | } |
| 3745 | |
| 3746 | info.h = h; |
| 3747 | info.other = h->root.other; |
| 3748 | info.first_gotent = &h->got_entries; |
| 3749 | } |
| 3750 | |
| 3751 | /* Search for the got entry to be used by this relocation. */ |
| 3752 | for (gotent = *info.first_gotent; gotent ; gotent = gotent->next) |
| 3753 | if (gotent->gotobj == info.gotobj |
| 3754 | && gotent->reloc_type == r_type |
| 3755 | && gotent->addend == irel->r_addend) |
| 3756 | break; |
| 3757 | info.gotent = gotent; |
| 3758 | |
| 3759 | symval += info.tsec->output_section->vma + info.tsec->output_offset; |
| 3760 | symval += irel->r_addend; |
| 3761 | |
| 3762 | switch (r_type) |
| 3763 | { |
| 3764 | case R_ALPHA_LITERAL: |
| 3765 | BFD_ASSERT(info.gotent != NULL); |
| 3766 | |
| 3767 | /* If there exist LITUSE relocations immediately following, this |
| 3768 | opens up all sorts of interesting optimizations, because we |
| 3769 | now know every location that this address load is used. */ |
| 3770 | if (irel+1 < irelend |
| 3771 | && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE) |
| 3772 | { |
| 3773 | if (!elf64_alpha_relax_with_lituse (&info, symval, irel)) |
| 3774 | goto error_return; |
| 3775 | } |
| 3776 | else |
| 3777 | { |
| 3778 | if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) |
| 3779 | goto error_return; |
| 3780 | } |
| 3781 | break; |
| 3782 | |
| 3783 | case R_ALPHA_GOTDTPREL: |
| 3784 | case R_ALPHA_GOTTPREL: |
| 3785 | BFD_ASSERT(info.gotent != NULL); |
| 3786 | if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) |
| 3787 | goto error_return; |
| 3788 | break; |
| 3789 | |
| 3790 | case R_ALPHA_TLSGD: |
| 3791 | case R_ALPHA_TLSLDM: |
| 3792 | BFD_ASSERT(info.gotent != NULL); |
| 3793 | if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel, |
| 3794 | r_type == R_ALPHA_TLSGD)) |
| 3795 | goto error_return; |
| 3796 | break; |
| 3797 | } |
| 3798 | } |
| 3799 | |
| 3800 | if (!elf64_alpha_size_plt_section (link_info)) |
| 3801 | return FALSE; |
| 3802 | if (!elf64_alpha_size_got_sections (link_info)) |
| 3803 | return FALSE; |
| 3804 | if (!elf64_alpha_size_rela_got_section (link_info)) |
| 3805 | return FALSE; |
| 3806 | |
| 3807 | if (isymbuf != NULL |
| 3808 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 3809 | { |
| 3810 | if (!link_info->keep_memory) |
| 3811 | free (isymbuf); |
| 3812 | else |
| 3813 | { |
| 3814 | /* Cache the symbols for elf_link_input_bfd. */ |
| 3815 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3816 | } |
| 3817 | } |
| 3818 | |
| 3819 | if (info.contents != NULL |
| 3820 | && elf_section_data (sec)->this_hdr.contents != info.contents) |
| 3821 | { |
| 3822 | if (!info.changed_contents && !link_info->keep_memory) |
| 3823 | free (info.contents); |
| 3824 | else |
| 3825 | { |
| 3826 | /* Cache the section contents for elf_link_input_bfd. */ |
| 3827 | elf_section_data (sec)->this_hdr.contents = info.contents; |
| 3828 | } |
| 3829 | } |
| 3830 | |
| 3831 | if (elf_section_data (sec)->relocs != internal_relocs) |
| 3832 | { |
| 3833 | if (!info.changed_relocs) |
| 3834 | free (internal_relocs); |
| 3835 | else |
| 3836 | elf_section_data (sec)->relocs = internal_relocs; |
| 3837 | } |
| 3838 | |
| 3839 | *again = info.changed_contents || info.changed_relocs; |
| 3840 | |
| 3841 | return TRUE; |
| 3842 | |
| 3843 | error_return: |
| 3844 | if (isymbuf != NULL |
| 3845 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 3846 | free (isymbuf); |
| 3847 | if (info.contents != NULL |
| 3848 | && elf_section_data (sec)->this_hdr.contents != info.contents) |
| 3849 | free (info.contents); |
| 3850 | if (internal_relocs != NULL |
| 3851 | && elf_section_data (sec)->relocs != internal_relocs) |
| 3852 | free (internal_relocs); |
| 3853 | return FALSE; |
| 3854 | } |
| 3855 | \f |
| 3856 | /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET) |
| 3857 | into the next available slot in SREL. */ |
| 3858 | |
| 3859 | static void |
| 3860 | elf64_alpha_emit_dynrel (bfd *abfd, struct bfd_link_info *info, |
| 3861 | asection *sec, asection *srel, bfd_vma offset, |
| 3862 | long dynindx, long rtype, bfd_vma addend) |
| 3863 | { |
| 3864 | Elf_Internal_Rela outrel; |
| 3865 | bfd_byte *loc; |
| 3866 | |
| 3867 | BFD_ASSERT (srel != NULL); |
| 3868 | |
| 3869 | outrel.r_info = ELF64_R_INFO (dynindx, rtype); |
| 3870 | outrel.r_addend = addend; |
| 3871 | |
| 3872 | offset = _bfd_elf_section_offset (abfd, info, sec, offset); |
| 3873 | if ((offset | 1) != (bfd_vma) -1) |
| 3874 | outrel.r_offset = sec->output_section->vma + sec->output_offset + offset; |
| 3875 | else |
| 3876 | memset (&outrel, 0, sizeof (outrel)); |
| 3877 | |
| 3878 | loc = srel->contents; |
| 3879 | loc += srel->reloc_count++ * sizeof (Elf64_External_Rela); |
| 3880 | bfd_elf64_swap_reloca_out (abfd, &outrel, loc); |
| 3881 | BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count <= srel->size); |
| 3882 | } |
| 3883 | |
| 3884 | /* Relocate an Alpha ELF section for a relocatable link. |
| 3885 | |
| 3886 | We don't have to change anything unless the reloc is against a section |
| 3887 | symbol, in which case we have to adjust according to where the section |
| 3888 | symbol winds up in the output section. */ |
| 3889 | |
| 3890 | static bfd_boolean |
| 3891 | elf64_alpha_relocate_section_r (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 3892 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 3893 | bfd *input_bfd, asection *input_section, |
| 3894 | bfd_byte *contents ATTRIBUTE_UNUSED, |
| 3895 | Elf_Internal_Rela *relocs, |
| 3896 | Elf_Internal_Sym *local_syms, |
| 3897 | asection **local_sections) |
| 3898 | { |
| 3899 | unsigned long symtab_hdr_sh_info; |
| 3900 | Elf_Internal_Rela *rel; |
| 3901 | Elf_Internal_Rela *relend; |
| 3902 | bfd_boolean ret_val = TRUE; |
| 3903 | |
| 3904 | symtab_hdr_sh_info = elf_tdata (input_bfd)->symtab_hdr.sh_info; |
| 3905 | |
| 3906 | relend = relocs + input_section->reloc_count; |
| 3907 | for (rel = relocs; rel < relend; rel++) |
| 3908 | { |
| 3909 | unsigned long r_symndx; |
| 3910 | Elf_Internal_Sym *sym; |
| 3911 | asection *sec; |
| 3912 | unsigned long r_type; |
| 3913 | |
| 3914 | r_type = ELF64_R_TYPE(rel->r_info); |
| 3915 | if (r_type >= R_ALPHA_max) |
| 3916 | { |
| 3917 | (*_bfd_error_handler) |
| 3918 | (_("%B: unknown relocation type %d"), |
| 3919 | input_bfd, (int) r_type); |
| 3920 | bfd_set_error (bfd_error_bad_value); |
| 3921 | ret_val = FALSE; |
| 3922 | continue; |
| 3923 | } |
| 3924 | |
| 3925 | r_symndx = ELF64_R_SYM(rel->r_info); |
| 3926 | |
| 3927 | /* The symbol associated with GPDISP and LITUSE is |
| 3928 | immaterial. Only the addend is significant. */ |
| 3929 | if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE) |
| 3930 | continue; |
| 3931 | |
| 3932 | if (r_symndx < symtab_hdr_sh_info) |
| 3933 | { |
| 3934 | sym = local_syms + r_symndx; |
| 3935 | if (ELF_ST_TYPE(sym->st_info) == STT_SECTION) |
| 3936 | { |
| 3937 | sec = local_sections[r_symndx]; |
| 3938 | rel->r_addend += sec->output_offset + sym->st_value; |
| 3939 | } |
| 3940 | } |
| 3941 | } |
| 3942 | |
| 3943 | return ret_val; |
| 3944 | } |
| 3945 | |
| 3946 | /* Relocate an Alpha ELF section. */ |
| 3947 | |
| 3948 | static bfd_boolean |
| 3949 | elf64_alpha_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
| 3950 | bfd *input_bfd, asection *input_section, |
| 3951 | bfd_byte *contents, Elf_Internal_Rela *relocs, |
| 3952 | Elf_Internal_Sym *local_syms, |
| 3953 | asection **local_sections) |
| 3954 | { |
| 3955 | Elf_Internal_Shdr *symtab_hdr; |
| 3956 | Elf_Internal_Rela *rel; |
| 3957 | Elf_Internal_Rela *relend; |
| 3958 | asection *sgot, *srel, *srelgot; |
| 3959 | bfd *dynobj, *gotobj; |
| 3960 | bfd_vma gp, tp_base, dtp_base; |
| 3961 | struct alpha_elf_got_entry **local_got_entries; |
| 3962 | bfd_boolean ret_val; |
| 3963 | |
| 3964 | /* Handle relocatable links with a smaller loop. */ |
| 3965 | if (info->relocatable) |
| 3966 | return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, |
| 3967 | input_section, contents, relocs, |
| 3968 | local_syms, local_sections); |
| 3969 | |
| 3970 | /* This is a final link. */ |
| 3971 | |
| 3972 | ret_val = TRUE; |
| 3973 | |
| 3974 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 3975 | |
| 3976 | dynobj = elf_hash_table (info)->dynobj; |
| 3977 | if (dynobj) |
| 3978 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 3979 | else |
| 3980 | srelgot = NULL; |
| 3981 | |
| 3982 | if (input_section->flags & SEC_ALLOC) |
| 3983 | { |
| 3984 | const char *section_name; |
| 3985 | section_name = (bfd_elf_string_from_elf_section |
| 3986 | (input_bfd, elf_elfheader(input_bfd)->e_shstrndx, |
| 3987 | elf_section_data(input_section)->rel_hdr.sh_name)); |
| 3988 | BFD_ASSERT(section_name != NULL); |
| 3989 | srel = bfd_get_section_by_name (dynobj, section_name); |
| 3990 | } |
| 3991 | else |
| 3992 | srel = NULL; |
| 3993 | |
| 3994 | /* Find the gp value for this input bfd. */ |
| 3995 | gotobj = alpha_elf_tdata (input_bfd)->gotobj; |
| 3996 | if (gotobj) |
| 3997 | { |
| 3998 | sgot = alpha_elf_tdata (gotobj)->got; |
| 3999 | gp = _bfd_get_gp_value (gotobj); |
| 4000 | if (gp == 0) |
| 4001 | { |
| 4002 | gp = (sgot->output_section->vma |
| 4003 | + sgot->output_offset |
| 4004 | + 0x8000); |
| 4005 | _bfd_set_gp_value (gotobj, gp); |
| 4006 | } |
| 4007 | } |
| 4008 | else |
| 4009 | { |
| 4010 | sgot = NULL; |
| 4011 | gp = 0; |
| 4012 | } |
| 4013 | |
| 4014 | local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries; |
| 4015 | |
| 4016 | if (elf_hash_table (info)->tls_sec != NULL) |
| 4017 | { |
| 4018 | dtp_base = alpha_get_dtprel_base (info); |
| 4019 | tp_base = alpha_get_tprel_base (info); |
| 4020 | } |
| 4021 | else |
| 4022 | dtp_base = tp_base = 0; |
| 4023 | |
| 4024 | relend = relocs + input_section->reloc_count; |
| 4025 | for (rel = relocs; rel < relend; rel++) |
| 4026 | { |
| 4027 | struct alpha_elf_link_hash_entry *h = NULL; |
| 4028 | struct alpha_elf_got_entry *gotent; |
| 4029 | bfd_reloc_status_type r; |
| 4030 | reloc_howto_type *howto; |
| 4031 | unsigned long r_symndx; |
| 4032 | Elf_Internal_Sym *sym = NULL; |
| 4033 | asection *sec = NULL; |
| 4034 | bfd_vma value; |
| 4035 | bfd_vma addend; |
| 4036 | bfd_boolean dynamic_symbol_p; |
| 4037 | bfd_boolean undef_weak_ref = FALSE; |
| 4038 | unsigned long r_type; |
| 4039 | |
| 4040 | r_type = ELF64_R_TYPE(rel->r_info); |
| 4041 | if (r_type >= R_ALPHA_max) |
| 4042 | { |
| 4043 | (*_bfd_error_handler) |
| 4044 | (_("%B: unknown relocation type %d"), |
| 4045 | input_bfd, (int) r_type); |
| 4046 | bfd_set_error (bfd_error_bad_value); |
| 4047 | ret_val = FALSE; |
| 4048 | continue; |
| 4049 | } |
| 4050 | |
| 4051 | howto = elf64_alpha_howto_table + r_type; |
| 4052 | r_symndx = ELF64_R_SYM(rel->r_info); |
| 4053 | |
| 4054 | /* The symbol for a TLSLDM reloc is ignored. Collapse the |
| 4055 | reloc to the 0 symbol so that they all match. */ |
| 4056 | if (r_type == R_ALPHA_TLSLDM) |
| 4057 | r_symndx = 0; |
| 4058 | |
| 4059 | if (r_symndx < symtab_hdr->sh_info) |
| 4060 | { |
| 4061 | asection *msec; |
| 4062 | sym = local_syms + r_symndx; |
| 4063 | sec = local_sections[r_symndx]; |
| 4064 | msec = sec; |
| 4065 | value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel); |
| 4066 | |
| 4067 | /* If this is a tp-relative relocation against sym 0, |
| 4068 | this is hackery from relax_section. Force the value to |
| 4069 | be the tls module base. */ |
| 4070 | if (r_symndx == 0 |
| 4071 | && (r_type == R_ALPHA_TLSLDM |
| 4072 | || r_type == R_ALPHA_GOTTPREL |
| 4073 | || r_type == R_ALPHA_TPREL64 |
| 4074 | || r_type == R_ALPHA_TPRELHI |
| 4075 | || r_type == R_ALPHA_TPRELLO |
| 4076 | || r_type == R_ALPHA_TPREL16)) |
| 4077 | value = dtp_base; |
| 4078 | |
| 4079 | if (local_got_entries) |
| 4080 | gotent = local_got_entries[r_symndx]; |
| 4081 | else |
| 4082 | gotent = NULL; |
| 4083 | |
| 4084 | /* Need to adjust local GOT entries' addends for SEC_MERGE |
| 4085 | unless it has been done already. */ |
| 4086 | if ((sec->flags & SEC_MERGE) |
| 4087 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION |
| 4088 | && sec->sec_info_type == ELF_INFO_TYPE_MERGE |
| 4089 | && gotent |
| 4090 | && !gotent->reloc_xlated) |
| 4091 | { |
| 4092 | struct alpha_elf_got_entry *ent; |
| 4093 | |
| 4094 | for (ent = gotent; ent; ent = ent->next) |
| 4095 | { |
| 4096 | ent->reloc_xlated = 1; |
| 4097 | if (ent->use_count == 0) |
| 4098 | continue; |
| 4099 | msec = sec; |
| 4100 | ent->addend = |
| 4101 | _bfd_merged_section_offset (output_bfd, &msec, |
| 4102 | elf_section_data (sec)-> |
| 4103 | sec_info, |
| 4104 | sym->st_value + ent->addend); |
| 4105 | ent->addend -= sym->st_value; |
| 4106 | ent->addend += msec->output_section->vma |
| 4107 | + msec->output_offset |
| 4108 | - sec->output_section->vma |
| 4109 | - sec->output_offset; |
| 4110 | } |
| 4111 | } |
| 4112 | |
| 4113 | dynamic_symbol_p = FALSE; |
| 4114 | } |
| 4115 | else |
| 4116 | { |
| 4117 | bfd_boolean warned; |
| 4118 | bfd_boolean unresolved_reloc; |
| 4119 | struct elf_link_hash_entry *hh; |
| 4120 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
| 4121 | |
| 4122 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 4123 | r_symndx, symtab_hdr, sym_hashes, |
| 4124 | hh, sec, value, |
| 4125 | unresolved_reloc, warned); |
| 4126 | |
| 4127 | if (warned) |
| 4128 | continue; |
| 4129 | |
| 4130 | if (value == 0 |
| 4131 | && ! unresolved_reloc |
| 4132 | && hh->root.type == bfd_link_hash_undefweak) |
| 4133 | undef_weak_ref = TRUE; |
| 4134 | |
| 4135 | h = (struct alpha_elf_link_hash_entry *) hh; |
| 4136 | dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info); |
| 4137 | gotent = h->got_entries; |
| 4138 | } |
| 4139 | |
| 4140 | addend = rel->r_addend; |
| 4141 | value += addend; |
| 4142 | |
| 4143 | /* Search for the proper got entry. */ |
| 4144 | for (; gotent ; gotent = gotent->next) |
| 4145 | if (gotent->gotobj == gotobj |
| 4146 | && gotent->reloc_type == r_type |
| 4147 | && gotent->addend == addend) |
| 4148 | break; |
| 4149 | |
| 4150 | switch (r_type) |
| 4151 | { |
| 4152 | case R_ALPHA_GPDISP: |
| 4153 | { |
| 4154 | bfd_byte *p_ldah, *p_lda; |
| 4155 | |
| 4156 | BFD_ASSERT(gp != 0); |
| 4157 | |
| 4158 | value = (input_section->output_section->vma |
| 4159 | + input_section->output_offset |
| 4160 | + rel->r_offset); |
| 4161 | |
| 4162 | p_ldah = contents + rel->r_offset; |
| 4163 | p_lda = p_ldah + rel->r_addend; |
| 4164 | |
| 4165 | r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - value, |
| 4166 | p_ldah, p_lda); |
| 4167 | } |
| 4168 | break; |
| 4169 | |
| 4170 | case R_ALPHA_LITERAL: |
| 4171 | BFD_ASSERT(sgot != NULL); |
| 4172 | BFD_ASSERT(gp != 0); |
| 4173 | BFD_ASSERT(gotent != NULL); |
| 4174 | BFD_ASSERT(gotent->use_count >= 1); |
| 4175 | |
| 4176 | if (!gotent->reloc_done) |
| 4177 | { |
| 4178 | gotent->reloc_done = 1; |
| 4179 | |
| 4180 | bfd_put_64 (output_bfd, value, |
| 4181 | sgot->contents + gotent->got_offset); |
| 4182 | |
| 4183 | /* If the symbol has been forced local, output a |
| 4184 | RELATIVE reloc, otherwise it will be handled in |
| 4185 | finish_dynamic_symbol. */ |
| 4186 | if (info->shared && !dynamic_symbol_p && !undef_weak_ref) |
| 4187 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, |
| 4188 | gotent->got_offset, 0, |
| 4189 | R_ALPHA_RELATIVE, value); |
| 4190 | } |
| 4191 | |
| 4192 | value = (sgot->output_section->vma |
| 4193 | + sgot->output_offset |
| 4194 | + gotent->got_offset); |
| 4195 | value -= gp; |
| 4196 | goto default_reloc; |
| 4197 | |
| 4198 | case R_ALPHA_GPREL32: |
| 4199 | /* If the target section was a removed linkonce section, |
| 4200 | r_symndx will be zero. In this case, assume that the |
| 4201 | switch will not be used, so don't fill it in. If we |
| 4202 | do nothing here, we'll get relocation truncated messages, |
| 4203 | due to the placement of the application above 4GB. */ |
| 4204 | if (r_symndx == 0) |
| 4205 | { |
| 4206 | r = bfd_reloc_ok; |
| 4207 | break; |
| 4208 | } |
| 4209 | /* FALLTHRU */ |
| 4210 | |
| 4211 | case R_ALPHA_GPREL16: |
| 4212 | case R_ALPHA_GPRELLOW: |
| 4213 | if (dynamic_symbol_p) |
| 4214 | { |
| 4215 | (*_bfd_error_handler) |
| 4216 | (_("%B: gp-relative relocation against dynamic symbol %s"), |
| 4217 | input_bfd, h->root.root.root.string); |
| 4218 | ret_val = FALSE; |
| 4219 | } |
| 4220 | BFD_ASSERT(gp != 0); |
| 4221 | value -= gp; |
| 4222 | goto default_reloc; |
| 4223 | |
| 4224 | case R_ALPHA_GPRELHIGH: |
| 4225 | if (dynamic_symbol_p) |
| 4226 | { |
| 4227 | (*_bfd_error_handler) |
| 4228 | (_("%B: gp-relative relocation against dynamic symbol %s"), |
| 4229 | input_bfd, h->root.root.root.string); |
| 4230 | ret_val = FALSE; |
| 4231 | } |
| 4232 | BFD_ASSERT(gp != 0); |
| 4233 | value -= gp; |
| 4234 | value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); |
| 4235 | goto default_reloc; |
| 4236 | |
| 4237 | case R_ALPHA_HINT: |
| 4238 | /* A call to a dynamic symbol is definitely out of range of |
| 4239 | the 16-bit displacement. Don't bother writing anything. */ |
| 4240 | if (dynamic_symbol_p) |
| 4241 | { |
| 4242 | r = bfd_reloc_ok; |
| 4243 | break; |
| 4244 | } |
| 4245 | /* The regular PC-relative stuff measures from the start of |
| 4246 | the instruction rather than the end. */ |
| 4247 | value -= 4; |
| 4248 | goto default_reloc; |
| 4249 | |
| 4250 | case R_ALPHA_BRADDR: |
| 4251 | if (dynamic_symbol_p) |
| 4252 | { |
| 4253 | (*_bfd_error_handler) |
| 4254 | (_("%B: pc-relative relocation against dynamic symbol %s"), |
| 4255 | input_bfd, h->root.root.root.string); |
| 4256 | ret_val = FALSE; |
| 4257 | } |
| 4258 | /* The regular PC-relative stuff measures from the start of |
| 4259 | the instruction rather than the end. */ |
| 4260 | value -= 4; |
| 4261 | goto default_reloc; |
| 4262 | |
| 4263 | case R_ALPHA_BRSGP: |
| 4264 | { |
| 4265 | int other; |
| 4266 | const char *name; |
| 4267 | |
| 4268 | /* The regular PC-relative stuff measures from the start of |
| 4269 | the instruction rather than the end. */ |
| 4270 | value -= 4; |
| 4271 | |
| 4272 | /* The source and destination gp must be the same. Note that |
| 4273 | the source will always have an assigned gp, since we forced |
| 4274 | one in check_relocs, but that the destination may not, as |
| 4275 | it might not have had any relocations at all. Also take |
| 4276 | care not to crash if H is an undefined symbol. */ |
| 4277 | if (h != NULL && sec != NULL |
| 4278 | && alpha_elf_tdata (sec->owner)->gotobj |
| 4279 | && gotobj != alpha_elf_tdata (sec->owner)->gotobj) |
| 4280 | { |
| 4281 | (*_bfd_error_handler) |
| 4282 | (_("%B: change in gp: BRSGP %s"), |
| 4283 | input_bfd, h->root.root.root.string); |
| 4284 | ret_val = FALSE; |
| 4285 | } |
| 4286 | |
| 4287 | /* The symbol should be marked either NOPV or STD_GPLOAD. */ |
| 4288 | if (h != NULL) |
| 4289 | other = h->root.other; |
| 4290 | else |
| 4291 | other = sym->st_other; |
| 4292 | switch (other & STO_ALPHA_STD_GPLOAD) |
| 4293 | { |
| 4294 | case STO_ALPHA_NOPV: |
| 4295 | break; |
| 4296 | case STO_ALPHA_STD_GPLOAD: |
| 4297 | value += 8; |
| 4298 | break; |
| 4299 | default: |
| 4300 | if (h != NULL) |
| 4301 | name = h->root.root.root.string; |
| 4302 | else |
| 4303 | { |
| 4304 | name = (bfd_elf_string_from_elf_section |
| 4305 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 4306 | if (name == NULL) |
| 4307 | name = _("<unknown>"); |
| 4308 | else if (name[0] == 0) |
| 4309 | name = bfd_section_name (input_bfd, sec); |
| 4310 | } |
| 4311 | (*_bfd_error_handler) |
| 4312 | (_("%B: !samegp reloc against symbol without .prologue: %s"), |
| 4313 | input_bfd, name); |
| 4314 | ret_val = FALSE; |
| 4315 | break; |
| 4316 | } |
| 4317 | |
| 4318 | goto default_reloc; |
| 4319 | } |
| 4320 | |
| 4321 | case R_ALPHA_REFLONG: |
| 4322 | case R_ALPHA_REFQUAD: |
| 4323 | case R_ALPHA_DTPREL64: |
| 4324 | case R_ALPHA_TPREL64: |
| 4325 | { |
| 4326 | long dynindx, dyntype = r_type; |
| 4327 | bfd_vma dynaddend; |
| 4328 | |
| 4329 | /* Careful here to remember RELATIVE relocations for global |
| 4330 | variables for symbolic shared objects. */ |
| 4331 | |
| 4332 | if (dynamic_symbol_p) |
| 4333 | { |
| 4334 | BFD_ASSERT(h->root.dynindx != -1); |
| 4335 | dynindx = h->root.dynindx; |
| 4336 | dynaddend = addend; |
| 4337 | addend = 0, value = 0; |
| 4338 | } |
| 4339 | else if (r_type == R_ALPHA_DTPREL64) |
| 4340 | { |
| 4341 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
| 4342 | value -= dtp_base; |
| 4343 | goto default_reloc; |
| 4344 | } |
| 4345 | else if (r_type == R_ALPHA_TPREL64) |
| 4346 | { |
| 4347 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
| 4348 | if (!info->shared) |
| 4349 | { |
| 4350 | value -= tp_base; |
| 4351 | goto default_reloc; |
| 4352 | } |
| 4353 | dynindx = 0; |
| 4354 | dynaddend = value - dtp_base; |
| 4355 | } |
| 4356 | else if (info->shared |
| 4357 | && r_symndx != 0 |
| 4358 | && (input_section->flags & SEC_ALLOC) |
| 4359 | && !undef_weak_ref) |
| 4360 | { |
| 4361 | if (r_type == R_ALPHA_REFLONG) |
| 4362 | { |
| 4363 | (*_bfd_error_handler) |
| 4364 | (_("%B: unhandled dynamic relocation against %s"), |
| 4365 | input_bfd, |
| 4366 | h->root.root.root.string); |
| 4367 | ret_val = FALSE; |
| 4368 | } |
| 4369 | dynindx = 0; |
| 4370 | dyntype = R_ALPHA_RELATIVE; |
| 4371 | dynaddend = value; |
| 4372 | } |
| 4373 | else |
| 4374 | goto default_reloc; |
| 4375 | |
| 4376 | if (input_section->flags & SEC_ALLOC) |
| 4377 | elf64_alpha_emit_dynrel (output_bfd, info, input_section, |
| 4378 | srel, rel->r_offset, dynindx, |
| 4379 | dyntype, dynaddend); |
| 4380 | } |
| 4381 | goto default_reloc; |
| 4382 | |
| 4383 | case R_ALPHA_SREL16: |
| 4384 | case R_ALPHA_SREL32: |
| 4385 | case R_ALPHA_SREL64: |
| 4386 | if (dynamic_symbol_p) |
| 4387 | { |
| 4388 | (*_bfd_error_handler) |
| 4389 | (_("%B: pc-relative relocation against dynamic symbol %s"), |
| 4390 | input_bfd, h->root.root.root.string); |
| 4391 | ret_val = FALSE; |
| 4392 | } |
| 4393 | else if ((info->shared || info->pie) && undef_weak_ref) |
| 4394 | { |
| 4395 | (*_bfd_error_handler) |
| 4396 | (_("%B: pc-relative relocation against undefined weak symbol %s"), |
| 4397 | input_bfd, h->root.root.root.string); |
| 4398 | ret_val = FALSE; |
| 4399 | } |
| 4400 | |
| 4401 | |
| 4402 | /* ??? .eh_frame references to discarded sections will be smashed |
| 4403 | to relocations against SHN_UNDEF. The .eh_frame format allows |
| 4404 | NULL to be encoded as 0 in any format, so this works here. */ |
| 4405 | if (r_symndx == 0) |
| 4406 | howto = (elf64_alpha_howto_table |
| 4407 | + (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG)); |
| 4408 | goto default_reloc; |
| 4409 | |
| 4410 | case R_ALPHA_TLSLDM: |
| 4411 | /* Ignore the symbol for the relocation. The result is always |
| 4412 | the current module. */ |
| 4413 | dynamic_symbol_p = 0; |
| 4414 | /* FALLTHRU */ |
| 4415 | |
| 4416 | case R_ALPHA_TLSGD: |
| 4417 | if (!gotent->reloc_done) |
| 4418 | { |
| 4419 | gotent->reloc_done = 1; |
| 4420 | |
| 4421 | /* Note that the module index for the main program is 1. */ |
| 4422 | bfd_put_64 (output_bfd, !info->shared && !dynamic_symbol_p, |
| 4423 | sgot->contents + gotent->got_offset); |
| 4424 | |
| 4425 | /* If the symbol has been forced local, output a |
| 4426 | DTPMOD64 reloc, otherwise it will be handled in |
| 4427 | finish_dynamic_symbol. */ |
| 4428 | if (info->shared && !dynamic_symbol_p) |
| 4429 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, |
| 4430 | gotent->got_offset, 0, |
| 4431 | R_ALPHA_DTPMOD64, 0); |
| 4432 | |
| 4433 | if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM) |
| 4434 | value = 0; |
| 4435 | else |
| 4436 | { |
| 4437 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
| 4438 | value -= dtp_base; |
| 4439 | } |
| 4440 | bfd_put_64 (output_bfd, value, |
| 4441 | sgot->contents + gotent->got_offset + 8); |
| 4442 | } |
| 4443 | |
| 4444 | value = (sgot->output_section->vma |
| 4445 | + sgot->output_offset |
| 4446 | + gotent->got_offset); |
| 4447 | value -= gp; |
| 4448 | goto default_reloc; |
| 4449 | |
| 4450 | case R_ALPHA_DTPRELHI: |
| 4451 | case R_ALPHA_DTPRELLO: |
| 4452 | case R_ALPHA_DTPREL16: |
| 4453 | if (dynamic_symbol_p) |
| 4454 | { |
| 4455 | (*_bfd_error_handler) |
| 4456 | (_("%B: dtp-relative relocation against dynamic symbol %s"), |
| 4457 | input_bfd, h->root.root.root.string); |
| 4458 | ret_val = FALSE; |
| 4459 | } |
| 4460 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
| 4461 | value -= dtp_base; |
| 4462 | if (r_type == R_ALPHA_DTPRELHI) |
| 4463 | value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); |
| 4464 | goto default_reloc; |
| 4465 | |
| 4466 | case R_ALPHA_TPRELHI: |
| 4467 | case R_ALPHA_TPRELLO: |
| 4468 | case R_ALPHA_TPREL16: |
| 4469 | if (info->shared) |
| 4470 | { |
| 4471 | (*_bfd_error_handler) |
| 4472 | (_("%B: TLS local exec code cannot be linked into shared objects"), |
| 4473 | input_bfd); |
| 4474 | ret_val = FALSE; |
| 4475 | } |
| 4476 | else if (dynamic_symbol_p) |
| 4477 | { |
| 4478 | (*_bfd_error_handler) |
| 4479 | (_("%B: tp-relative relocation against dynamic symbol %s"), |
| 4480 | input_bfd, h->root.root.root.string); |
| 4481 | ret_val = FALSE; |
| 4482 | } |
| 4483 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
| 4484 | value -= tp_base; |
| 4485 | if (r_type == R_ALPHA_TPRELHI) |
| 4486 | value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); |
| 4487 | goto default_reloc; |
| 4488 | |
| 4489 | case R_ALPHA_GOTDTPREL: |
| 4490 | case R_ALPHA_GOTTPREL: |
| 4491 | BFD_ASSERT(sgot != NULL); |
| 4492 | BFD_ASSERT(gp != 0); |
| 4493 | BFD_ASSERT(gotent != NULL); |
| 4494 | BFD_ASSERT(gotent->use_count >= 1); |
| 4495 | |
| 4496 | if (!gotent->reloc_done) |
| 4497 | { |
| 4498 | gotent->reloc_done = 1; |
| 4499 | |
| 4500 | if (dynamic_symbol_p) |
| 4501 | value = 0; |
| 4502 | else |
| 4503 | { |
| 4504 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
| 4505 | if (r_type == R_ALPHA_GOTDTPREL) |
| 4506 | value -= dtp_base; |
| 4507 | else if (!info->shared) |
| 4508 | value -= tp_base; |
| 4509 | else |
| 4510 | { |
| 4511 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, |
| 4512 | gotent->got_offset, 0, |
| 4513 | R_ALPHA_TPREL64, |
| 4514 | value - dtp_base); |
| 4515 | value = 0; |
| 4516 | } |
| 4517 | } |
| 4518 | bfd_put_64 (output_bfd, value, |
| 4519 | sgot->contents + gotent->got_offset); |
| 4520 | } |
| 4521 | |
| 4522 | value = (sgot->output_section->vma |
| 4523 | + sgot->output_offset |
| 4524 | + gotent->got_offset); |
| 4525 | value -= gp; |
| 4526 | goto default_reloc; |
| 4527 | |
| 4528 | default: |
| 4529 | default_reloc: |
| 4530 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 4531 | contents, rel->r_offset, value, 0); |
| 4532 | break; |
| 4533 | } |
| 4534 | |
| 4535 | switch (r) |
| 4536 | { |
| 4537 | case bfd_reloc_ok: |
| 4538 | break; |
| 4539 | |
| 4540 | case bfd_reloc_overflow: |
| 4541 | { |
| 4542 | const char *name; |
| 4543 | |
| 4544 | /* Don't warn if the overflow is due to pc relative reloc |
| 4545 | against discarded section. Section optimization code should |
| 4546 | handle it. */ |
| 4547 | |
| 4548 | if (r_symndx < symtab_hdr->sh_info |
| 4549 | && sec != NULL && howto->pc_relative |
| 4550 | && elf_discarded_section (sec)) |
| 4551 | break; |
| 4552 | |
| 4553 | if (h != NULL) |
| 4554 | name = NULL; |
| 4555 | else |
| 4556 | { |
| 4557 | name = (bfd_elf_string_from_elf_section |
| 4558 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 4559 | if (name == NULL) |
| 4560 | return FALSE; |
| 4561 | if (*name == '\0') |
| 4562 | name = bfd_section_name (input_bfd, sec); |
| 4563 | } |
| 4564 | if (! ((*info->callbacks->reloc_overflow) |
| 4565 | (info, (h ? &h->root.root : NULL), name, howto->name, |
| 4566 | (bfd_vma) 0, input_bfd, input_section, |
| 4567 | rel->r_offset))) |
| 4568 | ret_val = FALSE; |
| 4569 | } |
| 4570 | break; |
| 4571 | |
| 4572 | default: |
| 4573 | case bfd_reloc_outofrange: |
| 4574 | abort (); |
| 4575 | } |
| 4576 | } |
| 4577 | |
| 4578 | return ret_val; |
| 4579 | } |
| 4580 | |
| 4581 | /* Finish up dynamic symbol handling. We set the contents of various |
| 4582 | dynamic sections here. */ |
| 4583 | |
| 4584 | static bfd_boolean |
| 4585 | elf64_alpha_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, |
| 4586 | struct elf_link_hash_entry *h, |
| 4587 | Elf_Internal_Sym *sym) |
| 4588 | { |
| 4589 | struct alpha_elf_link_hash_entry *ah = (struct alpha_elf_link_hash_entry *)h; |
| 4590 | bfd *dynobj = elf_hash_table(info)->dynobj; |
| 4591 | |
| 4592 | if (h->needs_plt) |
| 4593 | { |
| 4594 | /* Fill in the .plt entry for this symbol. */ |
| 4595 | asection *splt, *sgot, *srel; |
| 4596 | Elf_Internal_Rela outrel; |
| 4597 | bfd_byte *loc; |
| 4598 | bfd_vma got_addr, plt_addr; |
| 4599 | bfd_vma plt_index; |
| 4600 | struct alpha_elf_got_entry *gotent; |
| 4601 | |
| 4602 | BFD_ASSERT (h->dynindx != -1); |
| 4603 | |
| 4604 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 4605 | BFD_ASSERT (splt != NULL); |
| 4606 | srel = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 4607 | BFD_ASSERT (srel != NULL); |
| 4608 | |
| 4609 | for (gotent = ah->got_entries; gotent ; gotent = gotent->next) |
| 4610 | if (gotent->reloc_type == R_ALPHA_LITERAL |
| 4611 | && gotent->use_count > 0) |
| 4612 | { |
| 4613 | unsigned int insn; |
| 4614 | int disp; |
| 4615 | |
| 4616 | sgot = alpha_elf_tdata (gotent->gotobj)->got; |
| 4617 | BFD_ASSERT (sgot != NULL); |
| 4618 | |
| 4619 | BFD_ASSERT (gotent->got_offset != -1); |
| 4620 | BFD_ASSERT (gotent->plt_offset != -1); |
| 4621 | |
| 4622 | got_addr = (sgot->output_section->vma |
| 4623 | + sgot->output_offset |
| 4624 | + gotent->got_offset); |
| 4625 | plt_addr = (splt->output_section->vma |
| 4626 | + splt->output_offset |
| 4627 | + gotent->plt_offset); |
| 4628 | |
| 4629 | plt_index = (gotent->plt_offset-PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; |
| 4630 | |
| 4631 | /* Fill in the entry in the procedure linkage table. */ |
| 4632 | if (elf64_alpha_use_secureplt) |
| 4633 | { |
| 4634 | disp = (PLT_HEADER_SIZE - 4) - (gotent->plt_offset + 4); |
| 4635 | insn = INSN_AD (INSN_BR, 31, disp); |
| 4636 | bfd_put_32 (output_bfd, insn, |
| 4637 | splt->contents + gotent->plt_offset); |
| 4638 | |
| 4639 | plt_index = ((gotent->plt_offset - NEW_PLT_HEADER_SIZE) |
| 4640 | / NEW_PLT_ENTRY_SIZE); |
| 4641 | } |
| 4642 | else |
| 4643 | { |
| 4644 | disp = -(gotent->plt_offset + 4); |
| 4645 | insn = INSN_AD (INSN_BR, 28, disp); |
| 4646 | bfd_put_32 (output_bfd, insn, |
| 4647 | splt->contents + gotent->plt_offset); |
| 4648 | bfd_put_32 (output_bfd, INSN_UNOP, |
| 4649 | splt->contents + gotent->plt_offset + 4); |
| 4650 | bfd_put_32 (output_bfd, INSN_UNOP, |
| 4651 | splt->contents + gotent->plt_offset + 8); |
| 4652 | |
| 4653 | plt_index = ((gotent->plt_offset - OLD_PLT_HEADER_SIZE) |
| 4654 | / OLD_PLT_ENTRY_SIZE); |
| 4655 | } |
| 4656 | |
| 4657 | /* Fill in the entry in the .rela.plt section. */ |
| 4658 | outrel.r_offset = got_addr; |
| 4659 | outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT); |
| 4660 | outrel.r_addend = 0; |
| 4661 | |
| 4662 | loc = srel->contents + plt_index * sizeof (Elf64_External_Rela); |
| 4663 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 4664 | |
| 4665 | /* Fill in the entry in the .got. */ |
| 4666 | bfd_put_64 (output_bfd, plt_addr, |
| 4667 | sgot->contents + gotent->got_offset); |
| 4668 | } |
| 4669 | } |
| 4670 | else if (alpha_elf_dynamic_symbol_p (h, info)) |
| 4671 | { |
| 4672 | /* Fill in the dynamic relocations for this symbol's .got entries. */ |
| 4673 | asection *srel; |
| 4674 | struct alpha_elf_got_entry *gotent; |
| 4675 | |
| 4676 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 4677 | BFD_ASSERT (srel != NULL); |
| 4678 | |
| 4679 | for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries; |
| 4680 | gotent != NULL; |
| 4681 | gotent = gotent->next) |
| 4682 | { |
| 4683 | asection *sgot; |
| 4684 | long r_type; |
| 4685 | |
| 4686 | if (gotent->use_count == 0) |
| 4687 | continue; |
| 4688 | |
| 4689 | sgot = alpha_elf_tdata (gotent->gotobj)->got; |
| 4690 | |
| 4691 | r_type = gotent->reloc_type; |
| 4692 | switch (r_type) |
| 4693 | { |
| 4694 | case R_ALPHA_LITERAL: |
| 4695 | r_type = R_ALPHA_GLOB_DAT; |
| 4696 | break; |
| 4697 | case R_ALPHA_TLSGD: |
| 4698 | r_type = R_ALPHA_DTPMOD64; |
| 4699 | break; |
| 4700 | case R_ALPHA_GOTDTPREL: |
| 4701 | r_type = R_ALPHA_DTPREL64; |
| 4702 | break; |
| 4703 | case R_ALPHA_GOTTPREL: |
| 4704 | r_type = R_ALPHA_TPREL64; |
| 4705 | break; |
| 4706 | case R_ALPHA_TLSLDM: |
| 4707 | default: |
| 4708 | abort (); |
| 4709 | } |
| 4710 | |
| 4711 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, |
| 4712 | gotent->got_offset, h->dynindx, |
| 4713 | r_type, gotent->addend); |
| 4714 | |
| 4715 | if (gotent->reloc_type == R_ALPHA_TLSGD) |
| 4716 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, |
| 4717 | gotent->got_offset + 8, h->dynindx, |
| 4718 | R_ALPHA_DTPREL64, gotent->addend); |
| 4719 | } |
| 4720 | } |
| 4721 | |
| 4722 | /* Mark some specially defined symbols as absolute. */ |
| 4723 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 4724 | || h == elf_hash_table (info)->hgot |
| 4725 | || h == elf_hash_table (info)->hplt) |
| 4726 | sym->st_shndx = SHN_ABS; |
| 4727 | |
| 4728 | return TRUE; |
| 4729 | } |
| 4730 | |
| 4731 | /* Finish up the dynamic sections. */ |
| 4732 | |
| 4733 | static bfd_boolean |
| 4734 | elf64_alpha_finish_dynamic_sections (bfd *output_bfd, |
| 4735 | struct bfd_link_info *info) |
| 4736 | { |
| 4737 | bfd *dynobj; |
| 4738 | asection *sdyn; |
| 4739 | |
| 4740 | dynobj = elf_hash_table (info)->dynobj; |
| 4741 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 4742 | |
| 4743 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4744 | { |
| 4745 | asection *splt, *sgotplt, *srelaplt; |
| 4746 | Elf64_External_Dyn *dyncon, *dynconend; |
| 4747 | bfd_vma plt_vma, gotplt_vma; |
| 4748 | |
| 4749 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 4750 | srelaplt = bfd_get_section_by_name (output_bfd, ".rela.plt"); |
| 4751 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 4752 | |
| 4753 | plt_vma = splt->output_section->vma + splt->output_offset; |
| 4754 | |
| 4755 | gotplt_vma = 0; |
| 4756 | if (elf64_alpha_use_secureplt) |
| 4757 | { |
| 4758 | sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 4759 | BFD_ASSERT (sgotplt != NULL); |
| 4760 | if (sgotplt->size > 0) |
| 4761 | gotplt_vma = sgotplt->output_section->vma + sgotplt->output_offset; |
| 4762 | } |
| 4763 | |
| 4764 | dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| 4765 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
| 4766 | for (; dyncon < dynconend; dyncon++) |
| 4767 | { |
| 4768 | Elf_Internal_Dyn dyn; |
| 4769 | |
| 4770 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| 4771 | |
| 4772 | switch (dyn.d_tag) |
| 4773 | { |
| 4774 | case DT_PLTGOT: |
| 4775 | dyn.d_un.d_ptr |
| 4776 | = elf64_alpha_use_secureplt ? gotplt_vma : plt_vma; |
| 4777 | break; |
| 4778 | case DT_PLTRELSZ: |
| 4779 | dyn.d_un.d_val = srelaplt ? srelaplt->size : 0; |
| 4780 | break; |
| 4781 | case DT_JMPREL: |
| 4782 | dyn.d_un.d_ptr = srelaplt ? srelaplt->vma : 0; |
| 4783 | break; |
| 4784 | |
| 4785 | case DT_RELASZ: |
| 4786 | /* My interpretation of the TIS v1.1 ELF document indicates |
| 4787 | that RELASZ should not include JMPREL. This is not what |
| 4788 | the rest of the BFD does. It is, however, what the |
| 4789 | glibc ld.so wants. Do this fixup here until we found |
| 4790 | out who is right. */ |
| 4791 | if (srelaplt) |
| 4792 | dyn.d_un.d_val -= srelaplt->size; |
| 4793 | break; |
| 4794 | } |
| 4795 | |
| 4796 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4797 | } |
| 4798 | |
| 4799 | /* Initialize the plt header. */ |
| 4800 | if (splt->size > 0) |
| 4801 | { |
| 4802 | unsigned int insn; |
| 4803 | int ofs; |
| 4804 | |
| 4805 | if (elf64_alpha_use_secureplt) |
| 4806 | { |
| 4807 | ofs = gotplt_vma - (plt_vma + PLT_HEADER_SIZE); |
| 4808 | |
| 4809 | insn = INSN_ABC (INSN_SUBQ, 27, 28, 25); |
| 4810 | bfd_put_32 (output_bfd, insn, splt->contents); |
| 4811 | |
| 4812 | insn = INSN_ABO (INSN_LDAH, 28, 28, (ofs + 0x8000) >> 16); |
| 4813 | bfd_put_32 (output_bfd, insn, splt->contents + 4); |
| 4814 | |
| 4815 | insn = INSN_ABC (INSN_S4SUBQ, 25, 25, 25); |
| 4816 | bfd_put_32 (output_bfd, insn, splt->contents + 8); |
| 4817 | |
| 4818 | insn = INSN_ABO (INSN_LDA, 28, 28, ofs); |
| 4819 | bfd_put_32 (output_bfd, insn, splt->contents + 12); |
| 4820 | |
| 4821 | insn = INSN_ABO (INSN_LDQ, 27, 28, 0); |
| 4822 | bfd_put_32 (output_bfd, insn, splt->contents + 16); |
| 4823 | |
| 4824 | insn = INSN_ABC (INSN_ADDQ, 25, 25, 25); |
| 4825 | bfd_put_32 (output_bfd, insn, splt->contents + 20); |
| 4826 | |
| 4827 | insn = INSN_ABO (INSN_LDQ, 28, 28, 8); |
| 4828 | bfd_put_32 (output_bfd, insn, splt->contents + 24); |
| 4829 | |
| 4830 | insn = INSN_AB (INSN_JMP, 31, 27); |
| 4831 | bfd_put_32 (output_bfd, insn, splt->contents + 28); |
| 4832 | |
| 4833 | insn = INSN_AD (INSN_BR, 28, -PLT_HEADER_SIZE); |
| 4834 | bfd_put_32 (output_bfd, insn, splt->contents + 32); |
| 4835 | } |
| 4836 | else |
| 4837 | { |
| 4838 | insn = INSN_AD (INSN_BR, 27, 0); /* br $27, .+4 */ |
| 4839 | bfd_put_32 (output_bfd, insn, splt->contents); |
| 4840 | |
| 4841 | insn = INSN_ABO (INSN_LDQ, 27, 27, 12); |
| 4842 | bfd_put_32 (output_bfd, insn, splt->contents + 4); |
| 4843 | |
| 4844 | insn = INSN_UNOP; |
| 4845 | bfd_put_32 (output_bfd, insn, splt->contents + 8); |
| 4846 | |
| 4847 | insn = INSN_AB (INSN_JMP, 27, 27); |
| 4848 | bfd_put_32 (output_bfd, insn, splt->contents + 12); |
| 4849 | |
| 4850 | /* The next two words will be filled in by ld.so. */ |
| 4851 | bfd_put_64 (output_bfd, 0, splt->contents + 16); |
| 4852 | bfd_put_64 (output_bfd, 0, splt->contents + 24); |
| 4853 | } |
| 4854 | |
| 4855 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0; |
| 4856 | } |
| 4857 | } |
| 4858 | |
| 4859 | return TRUE; |
| 4860 | } |
| 4861 | |
| 4862 | /* We need to use a special link routine to handle the .mdebug section. |
| 4863 | We need to merge all instances of these sections together, not write |
| 4864 | them all out sequentially. */ |
| 4865 | |
| 4866 | static bfd_boolean |
| 4867 | elf64_alpha_final_link (bfd *abfd, struct bfd_link_info *info) |
| 4868 | { |
| 4869 | asection *o; |
| 4870 | struct bfd_link_order *p; |
| 4871 | asection *mdebug_sec; |
| 4872 | struct ecoff_debug_info debug; |
| 4873 | const struct ecoff_debug_swap *swap |
| 4874 | = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 4875 | HDRR *symhdr = &debug.symbolic_header; |
| 4876 | PTR mdebug_handle = NULL; |
| 4877 | |
| 4878 | /* Go through the sections and collect the mdebug information. */ |
| 4879 | mdebug_sec = NULL; |
| 4880 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
| 4881 | { |
| 4882 | if (strcmp (o->name, ".mdebug") == 0) |
| 4883 | { |
| 4884 | struct extsym_info einfo; |
| 4885 | |
| 4886 | /* We have found the .mdebug section in the output file. |
| 4887 | Look through all the link_orders comprising it and merge |
| 4888 | the information together. */ |
| 4889 | symhdr->magic = swap->sym_magic; |
| 4890 | /* FIXME: What should the version stamp be? */ |
| 4891 | symhdr->vstamp = 0; |
| 4892 | symhdr->ilineMax = 0; |
| 4893 | symhdr->cbLine = 0; |
| 4894 | symhdr->idnMax = 0; |
| 4895 | symhdr->ipdMax = 0; |
| 4896 | symhdr->isymMax = 0; |
| 4897 | symhdr->ioptMax = 0; |
| 4898 | symhdr->iauxMax = 0; |
| 4899 | symhdr->issMax = 0; |
| 4900 | symhdr->issExtMax = 0; |
| 4901 | symhdr->ifdMax = 0; |
| 4902 | symhdr->crfd = 0; |
| 4903 | symhdr->iextMax = 0; |
| 4904 | |
| 4905 | /* We accumulate the debugging information itself in the |
| 4906 | debug_info structure. */ |
| 4907 | debug.line = NULL; |
| 4908 | debug.external_dnr = NULL; |
| 4909 | debug.external_pdr = NULL; |
| 4910 | debug.external_sym = NULL; |
| 4911 | debug.external_opt = NULL; |
| 4912 | debug.external_aux = NULL; |
| 4913 | debug.ss = NULL; |
| 4914 | debug.ssext = debug.ssext_end = NULL; |
| 4915 | debug.external_fdr = NULL; |
| 4916 | debug.external_rfd = NULL; |
| 4917 | debug.external_ext = debug.external_ext_end = NULL; |
| 4918 | |
| 4919 | mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); |
| 4920 | if (mdebug_handle == (PTR) NULL) |
| 4921 | return FALSE; |
| 4922 | |
| 4923 | if (1) |
| 4924 | { |
| 4925 | asection *s; |
| 4926 | EXTR esym; |
| 4927 | bfd_vma last = 0; |
| 4928 | unsigned int i; |
| 4929 | static const char * const name[] = |
| 4930 | { |
| 4931 | ".text", ".init", ".fini", ".data", |
| 4932 | ".rodata", ".sdata", ".sbss", ".bss" |
| 4933 | }; |
| 4934 | static const int sc[] = { scText, scInit, scFini, scData, |
| 4935 | scRData, scSData, scSBss, scBss }; |
| 4936 | |
| 4937 | esym.jmptbl = 0; |
| 4938 | esym.cobol_main = 0; |
| 4939 | esym.weakext = 0; |
| 4940 | esym.reserved = 0; |
| 4941 | esym.ifd = ifdNil; |
| 4942 | esym.asym.iss = issNil; |
| 4943 | esym.asym.st = stLocal; |
| 4944 | esym.asym.reserved = 0; |
| 4945 | esym.asym.index = indexNil; |
| 4946 | for (i = 0; i < 8; i++) |
| 4947 | { |
| 4948 | esym.asym.sc = sc[i]; |
| 4949 | s = bfd_get_section_by_name (abfd, name[i]); |
| 4950 | if (s != NULL) |
| 4951 | { |
| 4952 | esym.asym.value = s->vma; |
| 4953 | last = s->vma + s->size; |
| 4954 | } |
| 4955 | else |
| 4956 | esym.asym.value = last; |
| 4957 | |
| 4958 | if (! bfd_ecoff_debug_one_external (abfd, &debug, swap, |
| 4959 | name[i], &esym)) |
| 4960 | return FALSE; |
| 4961 | } |
| 4962 | } |
| 4963 | |
| 4964 | for (p = o->map_head.link_order; |
| 4965 | p != (struct bfd_link_order *) NULL; |
| 4966 | p = p->next) |
| 4967 | { |
| 4968 | asection *input_section; |
| 4969 | bfd *input_bfd; |
| 4970 | const struct ecoff_debug_swap *input_swap; |
| 4971 | struct ecoff_debug_info input_debug; |
| 4972 | char *eraw_src; |
| 4973 | char *eraw_end; |
| 4974 | |
| 4975 | if (p->type != bfd_indirect_link_order) |
| 4976 | { |
| 4977 | if (p->type == bfd_data_link_order) |
| 4978 | continue; |
| 4979 | abort (); |
| 4980 | } |
| 4981 | |
| 4982 | input_section = p->u.indirect.section; |
| 4983 | input_bfd = input_section->owner; |
| 4984 | |
| 4985 | if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour |
| 4986 | || (get_elf_backend_data (input_bfd) |
| 4987 | ->elf_backend_ecoff_debug_swap) == NULL) |
| 4988 | { |
| 4989 | /* I don't know what a non ALPHA ELF bfd would be |
| 4990 | doing with a .mdebug section, but I don't really |
| 4991 | want to deal with it. */ |
| 4992 | continue; |
| 4993 | } |
| 4994 | |
| 4995 | input_swap = (get_elf_backend_data (input_bfd) |
| 4996 | ->elf_backend_ecoff_debug_swap); |
| 4997 | |
| 4998 | BFD_ASSERT (p->size == input_section->size); |
| 4999 | |
| 5000 | /* The ECOFF linking code expects that we have already |
| 5001 | read in the debugging information and set up an |
| 5002 | ecoff_debug_info structure, so we do that now. */ |
| 5003 | if (!elf64_alpha_read_ecoff_info (input_bfd, input_section, |
| 5004 | &input_debug)) |
| 5005 | return FALSE; |
| 5006 | |
| 5007 | if (! (bfd_ecoff_debug_accumulate |
| 5008 | (mdebug_handle, abfd, &debug, swap, input_bfd, |
| 5009 | &input_debug, input_swap, info))) |
| 5010 | return FALSE; |
| 5011 | |
| 5012 | /* Loop through the external symbols. For each one with |
| 5013 | interesting information, try to find the symbol in |
| 5014 | the linker global hash table and save the information |
| 5015 | for the output external symbols. */ |
| 5016 | eraw_src = input_debug.external_ext; |
| 5017 | eraw_end = (eraw_src |
| 5018 | + (input_debug.symbolic_header.iextMax |
| 5019 | * input_swap->external_ext_size)); |
| 5020 | for (; |
| 5021 | eraw_src < eraw_end; |
| 5022 | eraw_src += input_swap->external_ext_size) |
| 5023 | { |
| 5024 | EXTR ext; |
| 5025 | const char *name; |
| 5026 | struct alpha_elf_link_hash_entry *h; |
| 5027 | |
| 5028 | (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext); |
| 5029 | if (ext.asym.sc == scNil |
| 5030 | || ext.asym.sc == scUndefined |
| 5031 | || ext.asym.sc == scSUndefined) |
| 5032 | continue; |
| 5033 | |
| 5034 | name = input_debug.ssext + ext.asym.iss; |
| 5035 | h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info), |
| 5036 | name, FALSE, FALSE, TRUE); |
| 5037 | if (h == NULL || h->esym.ifd != -2) |
| 5038 | continue; |
| 5039 | |
| 5040 | if (ext.ifd != -1) |
| 5041 | { |
| 5042 | BFD_ASSERT (ext.ifd |
| 5043 | < input_debug.symbolic_header.ifdMax); |
| 5044 | ext.ifd = input_debug.ifdmap[ext.ifd]; |
| 5045 | } |
| 5046 | |
| 5047 | h->esym = ext; |
| 5048 | } |
| 5049 | |
| 5050 | /* Free up the information we just read. */ |
| 5051 | free (input_debug.line); |
| 5052 | free (input_debug.external_dnr); |
| 5053 | free (input_debug.external_pdr); |
| 5054 | free (input_debug.external_sym); |
| 5055 | free (input_debug.external_opt); |
| 5056 | free (input_debug.external_aux); |
| 5057 | free (input_debug.ss); |
| 5058 | free (input_debug.ssext); |
| 5059 | free (input_debug.external_fdr); |
| 5060 | free (input_debug.external_rfd); |
| 5061 | free (input_debug.external_ext); |
| 5062 | |
| 5063 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 5064 | elf_link_input_bfd ignores this section. */ |
| 5065 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 5066 | } |
| 5067 | |
| 5068 | /* Build the external symbol information. */ |
| 5069 | einfo.abfd = abfd; |
| 5070 | einfo.info = info; |
| 5071 | einfo.debug = &debug; |
| 5072 | einfo.swap = swap; |
| 5073 | einfo.failed = FALSE; |
| 5074 | elf_link_hash_traverse (elf_hash_table (info), |
| 5075 | elf64_alpha_output_extsym, |
| 5076 | (PTR) &einfo); |
| 5077 | if (einfo.failed) |
| 5078 | return FALSE; |
| 5079 | |
| 5080 | /* Set the size of the .mdebug section. */ |
| 5081 | o->size = bfd_ecoff_debug_size (abfd, &debug, swap); |
| 5082 | |
| 5083 | /* Skip this section later on (I don't think this currently |
| 5084 | matters, but someday it might). */ |
| 5085 | o->map_head.link_order = (struct bfd_link_order *) NULL; |
| 5086 | |
| 5087 | mdebug_sec = o; |
| 5088 | } |
| 5089 | } |
| 5090 | |
| 5091 | /* Invoke the regular ELF backend linker to do all the work. */ |
| 5092 | if (! bfd_elf_final_link (abfd, info)) |
| 5093 | return FALSE; |
| 5094 | |
| 5095 | /* Now write out the computed sections. */ |
| 5096 | |
| 5097 | /* The .got subsections... */ |
| 5098 | { |
| 5099 | bfd *i, *dynobj = elf_hash_table(info)->dynobj; |
| 5100 | for (i = alpha_elf_hash_table(info)->got_list; |
| 5101 | i != NULL; |
| 5102 | i = alpha_elf_tdata(i)->got_link_next) |
| 5103 | { |
| 5104 | asection *sgot; |
| 5105 | |
| 5106 | /* elf_bfd_final_link already did everything in dynobj. */ |
| 5107 | if (i == dynobj) |
| 5108 | continue; |
| 5109 | |
| 5110 | sgot = alpha_elf_tdata(i)->got; |
| 5111 | if (! bfd_set_section_contents (abfd, sgot->output_section, |
| 5112 | sgot->contents, |
| 5113 | (file_ptr) sgot->output_offset, |
| 5114 | sgot->size)) |
| 5115 | return FALSE; |
| 5116 | } |
| 5117 | } |
| 5118 | |
| 5119 | if (mdebug_sec != (asection *) NULL) |
| 5120 | { |
| 5121 | BFD_ASSERT (abfd->output_has_begun); |
| 5122 | if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, |
| 5123 | swap, info, |
| 5124 | mdebug_sec->filepos)) |
| 5125 | return FALSE; |
| 5126 | |
| 5127 | bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); |
| 5128 | } |
| 5129 | |
| 5130 | return TRUE; |
| 5131 | } |
| 5132 | |
| 5133 | static enum elf_reloc_type_class |
| 5134 | elf64_alpha_reloc_type_class (const Elf_Internal_Rela *rela) |
| 5135 | { |
| 5136 | switch ((int) ELF64_R_TYPE (rela->r_info)) |
| 5137 | { |
| 5138 | case R_ALPHA_RELATIVE: |
| 5139 | return reloc_class_relative; |
| 5140 | case R_ALPHA_JMP_SLOT: |
| 5141 | return reloc_class_plt; |
| 5142 | case R_ALPHA_COPY: |
| 5143 | return reloc_class_copy; |
| 5144 | default: |
| 5145 | return reloc_class_normal; |
| 5146 | } |
| 5147 | } |
| 5148 | \f |
| 5149 | static const struct bfd_elf_special_section elf64_alpha_special_sections[] = |
| 5150 | { |
| 5151 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, |
| 5152 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, |
| 5153 | { NULL, 0, 0, 0, 0 } |
| 5154 | }; |
| 5155 | |
| 5156 | /* ECOFF swapping routines. These are used when dealing with the |
| 5157 | .mdebug section, which is in the ECOFF debugging format. Copied |
| 5158 | from elf32-mips.c. */ |
| 5159 | static const struct ecoff_debug_swap |
| 5160 | elf64_alpha_ecoff_debug_swap = |
| 5161 | { |
| 5162 | /* Symbol table magic number. */ |
| 5163 | magicSym2, |
| 5164 | /* Alignment of debugging information. E.g., 4. */ |
| 5165 | 8, |
| 5166 | /* Sizes of external symbolic information. */ |
| 5167 | sizeof (struct hdr_ext), |
| 5168 | sizeof (struct dnr_ext), |
| 5169 | sizeof (struct pdr_ext), |
| 5170 | sizeof (struct sym_ext), |
| 5171 | sizeof (struct opt_ext), |
| 5172 | sizeof (struct fdr_ext), |
| 5173 | sizeof (struct rfd_ext), |
| 5174 | sizeof (struct ext_ext), |
| 5175 | /* Functions to swap in external symbolic data. */ |
| 5176 | ecoff_swap_hdr_in, |
| 5177 | ecoff_swap_dnr_in, |
| 5178 | ecoff_swap_pdr_in, |
| 5179 | ecoff_swap_sym_in, |
| 5180 | ecoff_swap_opt_in, |
| 5181 | ecoff_swap_fdr_in, |
| 5182 | ecoff_swap_rfd_in, |
| 5183 | ecoff_swap_ext_in, |
| 5184 | _bfd_ecoff_swap_tir_in, |
| 5185 | _bfd_ecoff_swap_rndx_in, |
| 5186 | /* Functions to swap out external symbolic data. */ |
| 5187 | ecoff_swap_hdr_out, |
| 5188 | ecoff_swap_dnr_out, |
| 5189 | ecoff_swap_pdr_out, |
| 5190 | ecoff_swap_sym_out, |
| 5191 | ecoff_swap_opt_out, |
| 5192 | ecoff_swap_fdr_out, |
| 5193 | ecoff_swap_rfd_out, |
| 5194 | ecoff_swap_ext_out, |
| 5195 | _bfd_ecoff_swap_tir_out, |
| 5196 | _bfd_ecoff_swap_rndx_out, |
| 5197 | /* Function to read in symbolic data. */ |
| 5198 | elf64_alpha_read_ecoff_info |
| 5199 | }; |
| 5200 | \f |
| 5201 | /* Use a non-standard hash bucket size of 8. */ |
| 5202 | |
| 5203 | static const struct elf_size_info alpha_elf_size_info = |
| 5204 | { |
| 5205 | sizeof (Elf64_External_Ehdr), |
| 5206 | sizeof (Elf64_External_Phdr), |
| 5207 | sizeof (Elf64_External_Shdr), |
| 5208 | sizeof (Elf64_External_Rel), |
| 5209 | sizeof (Elf64_External_Rela), |
| 5210 | sizeof (Elf64_External_Sym), |
| 5211 | sizeof (Elf64_External_Dyn), |
| 5212 | sizeof (Elf_External_Note), |
| 5213 | 8, |
| 5214 | 1, |
| 5215 | 64, 3, |
| 5216 | ELFCLASS64, EV_CURRENT, |
| 5217 | bfd_elf64_write_out_phdrs, |
| 5218 | bfd_elf64_write_shdrs_and_ehdr, |
| 5219 | bfd_elf64_write_relocs, |
| 5220 | bfd_elf64_swap_symbol_in, |
| 5221 | bfd_elf64_swap_symbol_out, |
| 5222 | bfd_elf64_slurp_reloc_table, |
| 5223 | bfd_elf64_slurp_symbol_table, |
| 5224 | bfd_elf64_swap_dyn_in, |
| 5225 | bfd_elf64_swap_dyn_out, |
| 5226 | bfd_elf64_swap_reloc_in, |
| 5227 | bfd_elf64_swap_reloc_out, |
| 5228 | bfd_elf64_swap_reloca_in, |
| 5229 | bfd_elf64_swap_reloca_out |
| 5230 | }; |
| 5231 | |
| 5232 | #define TARGET_LITTLE_SYM bfd_elf64_alpha_vec |
| 5233 | #define TARGET_LITTLE_NAME "elf64-alpha" |
| 5234 | #define ELF_ARCH bfd_arch_alpha |
| 5235 | #define ELF_MACHINE_CODE EM_ALPHA |
| 5236 | #define ELF_MAXPAGESIZE 0x10000 |
| 5237 | #define ELF_COMMONPAGESIZE 0x2000 |
| 5238 | |
| 5239 | #define bfd_elf64_bfd_link_hash_table_create \ |
| 5240 | elf64_alpha_bfd_link_hash_table_create |
| 5241 | |
| 5242 | #define bfd_elf64_bfd_reloc_type_lookup \ |
| 5243 | elf64_alpha_bfd_reloc_type_lookup |
| 5244 | #define elf_info_to_howto \ |
| 5245 | elf64_alpha_info_to_howto |
| 5246 | |
| 5247 | #define bfd_elf64_mkobject \ |
| 5248 | elf64_alpha_mkobject |
| 5249 | #define elf_backend_object_p \ |
| 5250 | elf64_alpha_object_p |
| 5251 | |
| 5252 | #define elf_backend_section_from_shdr \ |
| 5253 | elf64_alpha_section_from_shdr |
| 5254 | #define elf_backend_section_flags \ |
| 5255 | elf64_alpha_section_flags |
| 5256 | #define elf_backend_fake_sections \ |
| 5257 | elf64_alpha_fake_sections |
| 5258 | |
| 5259 | #define bfd_elf64_bfd_is_local_label_name \ |
| 5260 | elf64_alpha_is_local_label_name |
| 5261 | #define bfd_elf64_find_nearest_line \ |
| 5262 | elf64_alpha_find_nearest_line |
| 5263 | #define bfd_elf64_bfd_relax_section \ |
| 5264 | elf64_alpha_relax_section |
| 5265 | |
| 5266 | #define elf_backend_add_symbol_hook \ |
| 5267 | elf64_alpha_add_symbol_hook |
| 5268 | #define elf_backend_check_relocs \ |
| 5269 | elf64_alpha_check_relocs |
| 5270 | #define elf_backend_create_dynamic_sections \ |
| 5271 | elf64_alpha_create_dynamic_sections |
| 5272 | #define elf_backend_adjust_dynamic_symbol \ |
| 5273 | elf64_alpha_adjust_dynamic_symbol |
| 5274 | #define elf_backend_always_size_sections \ |
| 5275 | elf64_alpha_always_size_sections |
| 5276 | #define elf_backend_size_dynamic_sections \ |
| 5277 | elf64_alpha_size_dynamic_sections |
| 5278 | #define elf_backend_omit_section_dynsym \ |
| 5279 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) |
| 5280 | #define elf_backend_relocate_section \ |
| 5281 | elf64_alpha_relocate_section |
| 5282 | #define elf_backend_finish_dynamic_symbol \ |
| 5283 | elf64_alpha_finish_dynamic_symbol |
| 5284 | #define elf_backend_finish_dynamic_sections \ |
| 5285 | elf64_alpha_finish_dynamic_sections |
| 5286 | #define bfd_elf64_bfd_final_link \ |
| 5287 | elf64_alpha_final_link |
| 5288 | #define elf_backend_reloc_type_class \ |
| 5289 | elf64_alpha_reloc_type_class |
| 5290 | |
| 5291 | #define elf_backend_ecoff_debug_swap \ |
| 5292 | &elf64_alpha_ecoff_debug_swap |
| 5293 | |
| 5294 | #define elf_backend_size_info \ |
| 5295 | alpha_elf_size_info |
| 5296 | |
| 5297 | #define elf_backend_special_sections \ |
| 5298 | elf64_alpha_special_sections |
| 5299 | |
| 5300 | /* A few constants that determine how the .plt section is set up. */ |
| 5301 | #define elf_backend_want_got_plt 0 |
| 5302 | #define elf_backend_plt_readonly 0 |
| 5303 | #define elf_backend_want_plt_sym 1 |
| 5304 | #define elf_backend_got_header_size 0 |
| 5305 | |
| 5306 | #include "elf64-target.h" |
| 5307 | \f |
| 5308 | /* FreeBSD support. */ |
| 5309 | |
| 5310 | #undef TARGET_LITTLE_SYM |
| 5311 | #define TARGET_LITTLE_SYM bfd_elf64_alpha_freebsd_vec |
| 5312 | #undef TARGET_LITTLE_NAME |
| 5313 | #define TARGET_LITTLE_NAME "elf64-alpha-freebsd" |
| 5314 | |
| 5315 | /* The kernel recognizes executables as valid only if they carry a |
| 5316 | "FreeBSD" label in the ELF header. So we put this label on all |
| 5317 | executables and (for simplicity) also all other object files. */ |
| 5318 | |
| 5319 | static void |
| 5320 | elf64_alpha_fbsd_post_process_headers (bfd * abfd, |
| 5321 | struct bfd_link_info * link_info ATTRIBUTE_UNUSED) |
| 5322 | { |
| 5323 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |
| 5324 | |
| 5325 | i_ehdrp = elf_elfheader (abfd); |
| 5326 | |
| 5327 | /* Put an ABI label supported by FreeBSD >= 4.1. */ |
| 5328 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD; |
| 5329 | #ifdef OLD_FREEBSD_ABI_LABEL |
| 5330 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ |
| 5331 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); |
| 5332 | #endif |
| 5333 | } |
| 5334 | |
| 5335 | #undef elf_backend_post_process_headers |
| 5336 | #define elf_backend_post_process_headers \ |
| 5337 | elf64_alpha_fbsd_post_process_headers |
| 5338 | |
| 5339 | #undef elf64_bed |
| 5340 | #define elf64_bed elf64_alpha_fbsd_bed |
| 5341 | |
| 5342 | #include "elf64-target.h" |