| 1 | /* Support for the generic parts of COFF, for BFD. |
| 2 | Copyright (C) 1990-2017 Free Software Foundation, Inc. |
| 3 | Written by Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | /* Most of this hacked by Steve Chamberlain, sac@cygnus.com. |
| 23 | Split out of coffcode.h by Ian Taylor, ian@cygnus.com. */ |
| 24 | |
| 25 | /* This file contains COFF code that is not dependent on any |
| 26 | particular COFF target. There is only one version of this file in |
| 27 | libbfd.a, so no target specific code may be put in here. Or, to |
| 28 | put it another way, |
| 29 | |
| 30 | ********** DO NOT PUT TARGET SPECIFIC CODE IN THIS FILE ********** |
| 31 | |
| 32 | If you need to add some target specific behaviour, add a new hook |
| 33 | function to bfd_coff_backend_data. |
| 34 | |
| 35 | Some of these functions are also called by the ECOFF routines. |
| 36 | Those functions may not use any COFF specific information, such as |
| 37 | coff_data (abfd). */ |
| 38 | |
| 39 | #include "sysdep.h" |
| 40 | #include "bfd.h" |
| 41 | #include "libbfd.h" |
| 42 | #include "coff/internal.h" |
| 43 | #include "libcoff.h" |
| 44 | |
| 45 | /* Take a section header read from a coff file (in HOST byte order), |
| 46 | and make a BFD "section" out of it. This is used by ECOFF. */ |
| 47 | |
| 48 | static bfd_boolean |
| 49 | make_a_section_from_file (bfd *abfd, |
| 50 | struct internal_scnhdr *hdr, |
| 51 | unsigned int target_index) |
| 52 | { |
| 53 | asection *return_section; |
| 54 | char *name; |
| 55 | bfd_boolean result = TRUE; |
| 56 | flagword flags; |
| 57 | |
| 58 | name = NULL; |
| 59 | |
| 60 | /* Handle long section names as in PE. On reading, we want to |
| 61 | accept long names if the format permits them at all, regardless |
| 62 | of the current state of the flag that dictates if we would generate |
| 63 | them in outputs; this construct checks if that is the case by |
| 64 | attempting to set the flag, without changing its state; the call |
| 65 | will fail for formats that do not support long names at all. */ |
| 66 | if (bfd_coff_set_long_section_names (abfd, bfd_coff_long_section_names (abfd)) |
| 67 | && hdr->s_name[0] == '/') |
| 68 | { |
| 69 | char buf[SCNNMLEN]; |
| 70 | long strindex; |
| 71 | char *p; |
| 72 | const char *strings; |
| 73 | |
| 74 | /* Flag that this BFD uses long names, even though the format might |
| 75 | expect them to be off by default. This won't directly affect the |
| 76 | format of any output BFD created from this one, but the information |
| 77 | can be used to decide what to do. */ |
| 78 | bfd_coff_set_long_section_names (abfd, TRUE); |
| 79 | memcpy (buf, hdr->s_name + 1, SCNNMLEN - 1); |
| 80 | buf[SCNNMLEN - 1] = '\0'; |
| 81 | strindex = strtol (buf, &p, 10); |
| 82 | if (*p == '\0' && strindex >= 0) |
| 83 | { |
| 84 | strings = _bfd_coff_read_string_table (abfd); |
| 85 | if (strings == NULL) |
| 86 | return FALSE; |
| 87 | if ((bfd_size_type)(strindex + 2) >= obj_coff_strings_len (abfd)) |
| 88 | return FALSE; |
| 89 | strings += strindex; |
| 90 | name = (char *) bfd_alloc (abfd, |
| 91 | (bfd_size_type) strlen (strings) + 1 + 1); |
| 92 | if (name == NULL) |
| 93 | return FALSE; |
| 94 | strcpy (name, strings); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | if (name == NULL) |
| 99 | { |
| 100 | /* Assorted wastage to null-terminate the name, thanks AT&T! */ |
| 101 | name = (char *) bfd_alloc (abfd, |
| 102 | (bfd_size_type) sizeof (hdr->s_name) + 1 + 1); |
| 103 | if (name == NULL) |
| 104 | return FALSE; |
| 105 | strncpy (name, (char *) &hdr->s_name[0], sizeof (hdr->s_name)); |
| 106 | name[sizeof (hdr->s_name)] = 0; |
| 107 | } |
| 108 | |
| 109 | return_section = bfd_make_section_anyway (abfd, name); |
| 110 | if (return_section == NULL) |
| 111 | return FALSE; |
| 112 | |
| 113 | return_section->vma = hdr->s_vaddr; |
| 114 | return_section->lma = hdr->s_paddr; |
| 115 | return_section->size = hdr->s_size; |
| 116 | return_section->filepos = hdr->s_scnptr; |
| 117 | return_section->rel_filepos = hdr->s_relptr; |
| 118 | return_section->reloc_count = hdr->s_nreloc; |
| 119 | |
| 120 | bfd_coff_set_alignment_hook (abfd, return_section, hdr); |
| 121 | |
| 122 | return_section->line_filepos = hdr->s_lnnoptr; |
| 123 | |
| 124 | return_section->lineno_count = hdr->s_nlnno; |
| 125 | return_section->userdata = NULL; |
| 126 | return_section->next = NULL; |
| 127 | return_section->target_index = target_index; |
| 128 | |
| 129 | if (! bfd_coff_styp_to_sec_flags_hook (abfd, hdr, name, return_section, |
| 130 | & flags)) |
| 131 | result = FALSE; |
| 132 | |
| 133 | return_section->flags = flags; |
| 134 | |
| 135 | /* At least on i386-coff, the line number count for a shared library |
| 136 | section must be ignored. */ |
| 137 | if ((return_section->flags & SEC_COFF_SHARED_LIBRARY) != 0) |
| 138 | return_section->lineno_count = 0; |
| 139 | |
| 140 | if (hdr->s_nreloc != 0) |
| 141 | return_section->flags |= SEC_RELOC; |
| 142 | /* FIXME: should this check 'hdr->s_size > 0'. */ |
| 143 | if (hdr->s_scnptr != 0) |
| 144 | return_section->flags |= SEC_HAS_CONTENTS; |
| 145 | |
| 146 | /* Compress/decompress DWARF debug sections with names: .debug_* and |
| 147 | .zdebug_*, after the section flags is set. */ |
| 148 | if ((flags & SEC_DEBUGGING) |
| 149 | && strlen (name) > 7 |
| 150 | && ((name[1] == 'd' && name[6] == '_') |
| 151 | || (strlen (name) > 8 && name[1] == 'z' && name[7] == '_'))) |
| 152 | { |
| 153 | enum { nothing, compress, decompress } action = nothing; |
| 154 | char *new_name = NULL; |
| 155 | |
| 156 | if (bfd_is_section_compressed (abfd, return_section)) |
| 157 | { |
| 158 | /* Compressed section. Check if we should decompress. */ |
| 159 | if ((abfd->flags & BFD_DECOMPRESS)) |
| 160 | action = decompress; |
| 161 | } |
| 162 | else if (!bfd_is_section_compressed (abfd, return_section)) |
| 163 | { |
| 164 | /* Normal section. Check if we should compress. */ |
| 165 | if ((abfd->flags & BFD_COMPRESS) && return_section->size != 0) |
| 166 | action = compress; |
| 167 | } |
| 168 | |
| 169 | switch (action) |
| 170 | { |
| 171 | case nothing: |
| 172 | break; |
| 173 | case compress: |
| 174 | if (!bfd_init_section_compress_status (abfd, return_section)) |
| 175 | { |
| 176 | _bfd_error_handler |
| 177 | /* xgettext: c-format */ |
| 178 | (_("%B: unable to initialize compress status for section %s"), |
| 179 | abfd, name); |
| 180 | return FALSE; |
| 181 | } |
| 182 | if (return_section->compress_status == COMPRESS_SECTION_DONE) |
| 183 | { |
| 184 | if (name[1] != 'z') |
| 185 | { |
| 186 | unsigned int len = strlen (name); |
| 187 | |
| 188 | new_name = bfd_alloc (abfd, len + 2); |
| 189 | if (new_name == NULL) |
| 190 | return FALSE; |
| 191 | new_name[0] = '.'; |
| 192 | new_name[1] = 'z'; |
| 193 | memcpy (new_name + 2, name + 1, len); |
| 194 | } |
| 195 | } |
| 196 | break; |
| 197 | case decompress: |
| 198 | if (!bfd_init_section_decompress_status (abfd, return_section)) |
| 199 | { |
| 200 | _bfd_error_handler |
| 201 | /* xgettext: c-format */ |
| 202 | (_("%B: unable to initialize decompress status for section %s"), |
| 203 | abfd, name); |
| 204 | return FALSE; |
| 205 | } |
| 206 | if (name[1] == 'z') |
| 207 | { |
| 208 | unsigned int len = strlen (name); |
| 209 | |
| 210 | new_name = bfd_alloc (abfd, len); |
| 211 | if (new_name == NULL) |
| 212 | return FALSE; |
| 213 | new_name[0] = '.'; |
| 214 | memcpy (new_name + 1, name + 2, len - 1); |
| 215 | } |
| 216 | break; |
| 217 | } |
| 218 | if (new_name != NULL) |
| 219 | bfd_rename_section (abfd, return_section, new_name); |
| 220 | } |
| 221 | |
| 222 | return result; |
| 223 | } |
| 224 | |
| 225 | /* Read in a COFF object and make it into a BFD. This is used by |
| 226 | ECOFF as well. */ |
| 227 | const bfd_target * |
| 228 | coff_real_object_p (bfd *, |
| 229 | unsigned, |
| 230 | struct internal_filehdr *, |
| 231 | struct internal_aouthdr *); |
| 232 | const bfd_target * |
| 233 | coff_real_object_p (bfd *abfd, |
| 234 | unsigned nscns, |
| 235 | struct internal_filehdr *internal_f, |
| 236 | struct internal_aouthdr *internal_a) |
| 237 | { |
| 238 | flagword oflags = abfd->flags; |
| 239 | bfd_vma ostart = bfd_get_start_address (abfd); |
| 240 | void * tdata; |
| 241 | void * tdata_save; |
| 242 | bfd_size_type readsize; /* Length of file_info. */ |
| 243 | unsigned int scnhsz; |
| 244 | char *external_sections; |
| 245 | |
| 246 | if (!(internal_f->f_flags & F_RELFLG)) |
| 247 | abfd->flags |= HAS_RELOC; |
| 248 | if ((internal_f->f_flags & F_EXEC)) |
| 249 | abfd->flags |= EXEC_P; |
| 250 | if (!(internal_f->f_flags & F_LNNO)) |
| 251 | abfd->flags |= HAS_LINENO; |
| 252 | if (!(internal_f->f_flags & F_LSYMS)) |
| 253 | abfd->flags |= HAS_LOCALS; |
| 254 | |
| 255 | /* FIXME: How can we set D_PAGED correctly? */ |
| 256 | if ((internal_f->f_flags & F_EXEC) != 0) |
| 257 | abfd->flags |= D_PAGED; |
| 258 | |
| 259 | bfd_get_symcount (abfd) = internal_f->f_nsyms; |
| 260 | if (internal_f->f_nsyms) |
| 261 | abfd->flags |= HAS_SYMS; |
| 262 | |
| 263 | if (internal_a != (struct internal_aouthdr *) NULL) |
| 264 | bfd_get_start_address (abfd) = internal_a->entry; |
| 265 | else |
| 266 | bfd_get_start_address (abfd) = 0; |
| 267 | |
| 268 | /* Set up the tdata area. ECOFF uses its own routine, and overrides |
| 269 | abfd->flags. */ |
| 270 | tdata_save = abfd->tdata.any; |
| 271 | tdata = bfd_coff_mkobject_hook (abfd, (void *) internal_f, (void *) internal_a); |
| 272 | if (tdata == NULL) |
| 273 | goto fail2; |
| 274 | |
| 275 | scnhsz = bfd_coff_scnhsz (abfd); |
| 276 | readsize = (bfd_size_type) nscns * scnhsz; |
| 277 | external_sections = (char *) bfd_alloc (abfd, readsize); |
| 278 | if (!external_sections) |
| 279 | goto fail; |
| 280 | |
| 281 | if (bfd_bread ((void *) external_sections, readsize, abfd) != readsize) |
| 282 | goto fail; |
| 283 | |
| 284 | /* Set the arch/mach *before* swapping in sections; section header swapping |
| 285 | may depend on arch/mach info. */ |
| 286 | if (! bfd_coff_set_arch_mach_hook (abfd, (void *) internal_f)) |
| 287 | goto fail; |
| 288 | |
| 289 | /* Now copy data as required; construct all asections etc. */ |
| 290 | if (nscns != 0) |
| 291 | { |
| 292 | unsigned int i; |
| 293 | for (i = 0; i < nscns; i++) |
| 294 | { |
| 295 | struct internal_scnhdr tmp; |
| 296 | bfd_coff_swap_scnhdr_in (abfd, |
| 297 | (void *) (external_sections + i * scnhsz), |
| 298 | (void *) & tmp); |
| 299 | if (! make_a_section_from_file (abfd, &tmp, i + 1)) |
| 300 | goto fail; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | return abfd->xvec; |
| 305 | |
| 306 | fail: |
| 307 | bfd_release (abfd, tdata); |
| 308 | fail2: |
| 309 | abfd->tdata.any = tdata_save; |
| 310 | abfd->flags = oflags; |
| 311 | bfd_get_start_address (abfd) = ostart; |
| 312 | return (const bfd_target *) NULL; |
| 313 | } |
| 314 | |
| 315 | /* Turn a COFF file into a BFD, but fail with bfd_error_wrong_format if it is |
| 316 | not a COFF file. This is also used by ECOFF. */ |
| 317 | |
| 318 | const bfd_target * |
| 319 | coff_object_p (bfd *abfd) |
| 320 | { |
| 321 | bfd_size_type filhsz; |
| 322 | bfd_size_type aoutsz; |
| 323 | unsigned int nscns; |
| 324 | void * filehdr; |
| 325 | struct internal_filehdr internal_f; |
| 326 | struct internal_aouthdr internal_a; |
| 327 | |
| 328 | /* Figure out how much to read. */ |
| 329 | filhsz = bfd_coff_filhsz (abfd); |
| 330 | aoutsz = bfd_coff_aoutsz (abfd); |
| 331 | |
| 332 | filehdr = bfd_alloc (abfd, filhsz); |
| 333 | if (filehdr == NULL) |
| 334 | return NULL; |
| 335 | if (bfd_bread (filehdr, filhsz, abfd) != filhsz) |
| 336 | { |
| 337 | if (bfd_get_error () != bfd_error_system_call) |
| 338 | bfd_set_error (bfd_error_wrong_format); |
| 339 | bfd_release (abfd, filehdr); |
| 340 | return NULL; |
| 341 | } |
| 342 | bfd_coff_swap_filehdr_in (abfd, filehdr, &internal_f); |
| 343 | bfd_release (abfd, filehdr); |
| 344 | |
| 345 | /* The XCOFF format has two sizes for the f_opthdr. SMALL_AOUTSZ |
| 346 | (less than aoutsz) used in object files and AOUTSZ (equal to |
| 347 | aoutsz) in executables. The bfd_coff_swap_aouthdr_in function |
| 348 | expects this header to be aoutsz bytes in length, so we use that |
| 349 | value in the call to bfd_alloc below. But we must be careful to |
| 350 | only read in f_opthdr bytes in the call to bfd_bread. We should |
| 351 | also attempt to catch corrupt or non-COFF binaries with a strange |
| 352 | value for f_opthdr. */ |
| 353 | if (! bfd_coff_bad_format_hook (abfd, &internal_f) |
| 354 | || internal_f.f_opthdr > aoutsz) |
| 355 | { |
| 356 | bfd_set_error (bfd_error_wrong_format); |
| 357 | return NULL; |
| 358 | } |
| 359 | nscns = internal_f.f_nscns; |
| 360 | |
| 361 | if (internal_f.f_opthdr) |
| 362 | { |
| 363 | void * opthdr; |
| 364 | |
| 365 | opthdr = bfd_alloc (abfd, aoutsz); |
| 366 | if (opthdr == NULL) |
| 367 | return NULL; |
| 368 | if (bfd_bread (opthdr, (bfd_size_type) internal_f.f_opthdr, abfd) |
| 369 | != internal_f.f_opthdr) |
| 370 | { |
| 371 | bfd_release (abfd, opthdr); |
| 372 | return NULL; |
| 373 | } |
| 374 | /* PR 17512: file: 11056-1136-0.004. */ |
| 375 | if (internal_f.f_opthdr < aoutsz) |
| 376 | memset (((char *) opthdr) + internal_f.f_opthdr, 0, aoutsz - internal_f.f_opthdr); |
| 377 | |
| 378 | bfd_coff_swap_aouthdr_in (abfd, opthdr, (void *) &internal_a); |
| 379 | bfd_release (abfd, opthdr); |
| 380 | } |
| 381 | |
| 382 | return coff_real_object_p (abfd, nscns, &internal_f, |
| 383 | (internal_f.f_opthdr != 0 |
| 384 | ? &internal_a |
| 385 | : (struct internal_aouthdr *) NULL)); |
| 386 | } |
| 387 | |
| 388 | /* Get the BFD section from a COFF symbol section number. */ |
| 389 | |
| 390 | asection * |
| 391 | coff_section_from_bfd_index (bfd *abfd, int section_index) |
| 392 | { |
| 393 | struct bfd_section *answer = abfd->sections; |
| 394 | |
| 395 | if (section_index == N_ABS) |
| 396 | return bfd_abs_section_ptr; |
| 397 | if (section_index == N_UNDEF) |
| 398 | return bfd_und_section_ptr; |
| 399 | if (section_index == N_DEBUG) |
| 400 | return bfd_abs_section_ptr; |
| 401 | |
| 402 | while (answer) |
| 403 | { |
| 404 | if (answer->target_index == section_index) |
| 405 | return answer; |
| 406 | answer = answer->next; |
| 407 | } |
| 408 | |
| 409 | /* We should not reach this point, but the SCO 3.2v4 /lib/libc_s.a |
| 410 | has a bad symbol table in biglitpow.o. */ |
| 411 | return bfd_und_section_ptr; |
| 412 | } |
| 413 | |
| 414 | /* Get the upper bound of a COFF symbol table. */ |
| 415 | |
| 416 | long |
| 417 | coff_get_symtab_upper_bound (bfd *abfd) |
| 418 | { |
| 419 | if (!bfd_coff_slurp_symbol_table (abfd)) |
| 420 | return -1; |
| 421 | |
| 422 | return (bfd_get_symcount (abfd) + 1) * (sizeof (coff_symbol_type *)); |
| 423 | } |
| 424 | |
| 425 | /* Canonicalize a COFF symbol table. */ |
| 426 | |
| 427 | long |
| 428 | coff_canonicalize_symtab (bfd *abfd, asymbol **alocation) |
| 429 | { |
| 430 | unsigned int counter; |
| 431 | coff_symbol_type *symbase; |
| 432 | coff_symbol_type **location = (coff_symbol_type **) alocation; |
| 433 | |
| 434 | if (!bfd_coff_slurp_symbol_table (abfd)) |
| 435 | return -1; |
| 436 | |
| 437 | symbase = obj_symbols (abfd); |
| 438 | counter = bfd_get_symcount (abfd); |
| 439 | while (counter-- > 0) |
| 440 | *location++ = symbase++; |
| 441 | |
| 442 | *location = NULL; |
| 443 | |
| 444 | return bfd_get_symcount (abfd); |
| 445 | } |
| 446 | |
| 447 | /* Get the name of a symbol. The caller must pass in a buffer of size |
| 448 | >= SYMNMLEN + 1. */ |
| 449 | |
| 450 | const char * |
| 451 | _bfd_coff_internal_syment_name (bfd *abfd, |
| 452 | const struct internal_syment *sym, |
| 453 | char *buf) |
| 454 | { |
| 455 | /* FIXME: It's not clear this will work correctly if sizeof |
| 456 | (_n_zeroes) != 4. */ |
| 457 | if (sym->_n._n_n._n_zeroes != 0 |
| 458 | || sym->_n._n_n._n_offset == 0) |
| 459 | { |
| 460 | memcpy (buf, sym->_n._n_name, SYMNMLEN); |
| 461 | buf[SYMNMLEN] = '\0'; |
| 462 | return buf; |
| 463 | } |
| 464 | else |
| 465 | { |
| 466 | const char *strings; |
| 467 | |
| 468 | BFD_ASSERT (sym->_n._n_n._n_offset >= STRING_SIZE_SIZE); |
| 469 | strings = obj_coff_strings (abfd); |
| 470 | if (strings == NULL) |
| 471 | { |
| 472 | strings = _bfd_coff_read_string_table (abfd); |
| 473 | if (strings == NULL) |
| 474 | return NULL; |
| 475 | } |
| 476 | /* PR 17910: Only check for string overflow if the length has been set. |
| 477 | Some DLLs, eg those produced by Visual Studio, may not set the length field. */ |
| 478 | if (obj_coff_strings_len (abfd) > 0 |
| 479 | && sym->_n._n_n._n_offset >= obj_coff_strings_len (abfd)) |
| 480 | return NULL; |
| 481 | return strings + sym->_n._n_n._n_offset; |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | /* Read in and swap the relocs. This returns a buffer holding the |
| 486 | relocs for section SEC in file ABFD. If CACHE is TRUE and |
| 487 | INTERNAL_RELOCS is NULL, the relocs read in will be saved in case |
| 488 | the function is called again. If EXTERNAL_RELOCS is not NULL, it |
| 489 | is a buffer large enough to hold the unswapped relocs. If |
| 490 | INTERNAL_RELOCS is not NULL, it is a buffer large enough to hold |
| 491 | the swapped relocs. If REQUIRE_INTERNAL is TRUE, then the return |
| 492 | value must be INTERNAL_RELOCS. The function returns NULL on error. */ |
| 493 | |
| 494 | struct internal_reloc * |
| 495 | _bfd_coff_read_internal_relocs (bfd *abfd, |
| 496 | asection *sec, |
| 497 | bfd_boolean cache, |
| 498 | bfd_byte *external_relocs, |
| 499 | bfd_boolean require_internal, |
| 500 | struct internal_reloc *internal_relocs) |
| 501 | { |
| 502 | bfd_size_type relsz; |
| 503 | bfd_byte *free_external = NULL; |
| 504 | struct internal_reloc *free_internal = NULL; |
| 505 | bfd_byte *erel; |
| 506 | bfd_byte *erel_end; |
| 507 | struct internal_reloc *irel; |
| 508 | bfd_size_type amt; |
| 509 | |
| 510 | if (sec->reloc_count == 0) |
| 511 | return internal_relocs; /* Nothing to do. */ |
| 512 | |
| 513 | if (coff_section_data (abfd, sec) != NULL |
| 514 | && coff_section_data (abfd, sec)->relocs != NULL) |
| 515 | { |
| 516 | if (! require_internal) |
| 517 | return coff_section_data (abfd, sec)->relocs; |
| 518 | memcpy (internal_relocs, coff_section_data (abfd, sec)->relocs, |
| 519 | sec->reloc_count * sizeof (struct internal_reloc)); |
| 520 | return internal_relocs; |
| 521 | } |
| 522 | |
| 523 | relsz = bfd_coff_relsz (abfd); |
| 524 | |
| 525 | amt = sec->reloc_count * relsz; |
| 526 | if (external_relocs == NULL) |
| 527 | { |
| 528 | free_external = (bfd_byte *) bfd_malloc (amt); |
| 529 | if (free_external == NULL) |
| 530 | goto error_return; |
| 531 | external_relocs = free_external; |
| 532 | } |
| 533 | |
| 534 | if (bfd_seek (abfd, sec->rel_filepos, SEEK_SET) != 0 |
| 535 | || bfd_bread (external_relocs, amt, abfd) != amt) |
| 536 | goto error_return; |
| 537 | |
| 538 | if (internal_relocs == NULL) |
| 539 | { |
| 540 | amt = sec->reloc_count; |
| 541 | amt *= sizeof (struct internal_reloc); |
| 542 | free_internal = (struct internal_reloc *) bfd_malloc (amt); |
| 543 | if (free_internal == NULL) |
| 544 | goto error_return; |
| 545 | internal_relocs = free_internal; |
| 546 | } |
| 547 | |
| 548 | /* Swap in the relocs. */ |
| 549 | erel = external_relocs; |
| 550 | erel_end = erel + relsz * sec->reloc_count; |
| 551 | irel = internal_relocs; |
| 552 | for (; erel < erel_end; erel += relsz, irel++) |
| 553 | bfd_coff_swap_reloc_in (abfd, (void *) erel, (void *) irel); |
| 554 | |
| 555 | if (free_external != NULL) |
| 556 | { |
| 557 | free (free_external); |
| 558 | free_external = NULL; |
| 559 | } |
| 560 | |
| 561 | if (cache && free_internal != NULL) |
| 562 | { |
| 563 | if (coff_section_data (abfd, sec) == NULL) |
| 564 | { |
| 565 | amt = sizeof (struct coff_section_tdata); |
| 566 | sec->used_by_bfd = bfd_zalloc (abfd, amt); |
| 567 | if (sec->used_by_bfd == NULL) |
| 568 | goto error_return; |
| 569 | coff_section_data (abfd, sec)->contents = NULL; |
| 570 | } |
| 571 | coff_section_data (abfd, sec)->relocs = free_internal; |
| 572 | } |
| 573 | |
| 574 | return internal_relocs; |
| 575 | |
| 576 | error_return: |
| 577 | if (free_external != NULL) |
| 578 | free (free_external); |
| 579 | if (free_internal != NULL) |
| 580 | free (free_internal); |
| 581 | return NULL; |
| 582 | } |
| 583 | |
| 584 | /* Set lineno_count for the output sections of a COFF file. */ |
| 585 | |
| 586 | int |
| 587 | coff_count_linenumbers (bfd *abfd) |
| 588 | { |
| 589 | unsigned int limit = bfd_get_symcount (abfd); |
| 590 | unsigned int i; |
| 591 | int total = 0; |
| 592 | asymbol **p; |
| 593 | asection *s; |
| 594 | |
| 595 | if (limit == 0) |
| 596 | { |
| 597 | /* This may be from the backend linker, in which case the |
| 598 | lineno_count in the sections is correct. */ |
| 599 | for (s = abfd->sections; s != NULL; s = s->next) |
| 600 | total += s->lineno_count; |
| 601 | return total; |
| 602 | } |
| 603 | |
| 604 | for (s = abfd->sections; s != NULL; s = s->next) |
| 605 | BFD_ASSERT (s->lineno_count == 0); |
| 606 | |
| 607 | for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) |
| 608 | { |
| 609 | asymbol *q_maybe = *p; |
| 610 | |
| 611 | if (bfd_family_coff (bfd_asymbol_bfd (q_maybe))) |
| 612 | { |
| 613 | coff_symbol_type *q = coffsymbol (q_maybe); |
| 614 | |
| 615 | /* The AIX 4.1 compiler can sometimes generate line numbers |
| 616 | attached to debugging symbols. We try to simply ignore |
| 617 | those here. */ |
| 618 | if (q->lineno != NULL |
| 619 | && q->symbol.section->owner != NULL) |
| 620 | { |
| 621 | /* This symbol has line numbers. Increment the owning |
| 622 | section's linenumber count. */ |
| 623 | alent *l = q->lineno; |
| 624 | |
| 625 | do |
| 626 | { |
| 627 | asection * sec = q->symbol.section->output_section; |
| 628 | |
| 629 | /* Do not try to update fields in read-only sections. */ |
| 630 | if (! bfd_is_const_section (sec)) |
| 631 | sec->lineno_count ++; |
| 632 | |
| 633 | ++total; |
| 634 | ++l; |
| 635 | } |
| 636 | while (l->line_number != 0); |
| 637 | } |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | return total; |
| 642 | } |
| 643 | |
| 644 | static void |
| 645 | fixup_symbol_value (bfd *abfd, |
| 646 | coff_symbol_type *coff_symbol_ptr, |
| 647 | struct internal_syment *syment) |
| 648 | { |
| 649 | /* Normalize the symbol flags. */ |
| 650 | if (coff_symbol_ptr->symbol.section |
| 651 | && bfd_is_com_section (coff_symbol_ptr->symbol.section)) |
| 652 | { |
| 653 | /* A common symbol is undefined with a value. */ |
| 654 | syment->n_scnum = N_UNDEF; |
| 655 | syment->n_value = coff_symbol_ptr->symbol.value; |
| 656 | } |
| 657 | else if ((coff_symbol_ptr->symbol.flags & BSF_DEBUGGING) != 0 |
| 658 | && (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING_RELOC) == 0) |
| 659 | { |
| 660 | syment->n_value = coff_symbol_ptr->symbol.value; |
| 661 | } |
| 662 | else if (bfd_is_und_section (coff_symbol_ptr->symbol.section)) |
| 663 | { |
| 664 | syment->n_scnum = N_UNDEF; |
| 665 | syment->n_value = 0; |
| 666 | } |
| 667 | /* FIXME: Do we need to handle the absolute section here? */ |
| 668 | else |
| 669 | { |
| 670 | if (coff_symbol_ptr->symbol.section) |
| 671 | { |
| 672 | syment->n_scnum = |
| 673 | coff_symbol_ptr->symbol.section->output_section->target_index; |
| 674 | |
| 675 | syment->n_value = (coff_symbol_ptr->symbol.value |
| 676 | + coff_symbol_ptr->symbol.section->output_offset); |
| 677 | if (! obj_pe (abfd)) |
| 678 | { |
| 679 | syment->n_value += (syment->n_sclass == C_STATLAB) |
| 680 | ? coff_symbol_ptr->symbol.section->output_section->lma |
| 681 | : coff_symbol_ptr->symbol.section->output_section->vma; |
| 682 | } |
| 683 | } |
| 684 | else |
| 685 | { |
| 686 | BFD_ASSERT (0); |
| 687 | /* This can happen, but I don't know why yet (steve@cygnus.com) */ |
| 688 | syment->n_scnum = N_ABS; |
| 689 | syment->n_value = coff_symbol_ptr->symbol.value; |
| 690 | } |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | /* Run through all the symbols in the symbol table and work out what |
| 695 | their indexes into the symbol table will be when output. |
| 696 | |
| 697 | Coff requires that each C_FILE symbol points to the next one in the |
| 698 | chain, and that the last one points to the first external symbol. We |
| 699 | do that here too. */ |
| 700 | |
| 701 | bfd_boolean |
| 702 | coff_renumber_symbols (bfd *bfd_ptr, int *first_undef) |
| 703 | { |
| 704 | unsigned int symbol_count = bfd_get_symcount (bfd_ptr); |
| 705 | asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols; |
| 706 | unsigned int native_index = 0; |
| 707 | struct internal_syment *last_file = NULL; |
| 708 | unsigned int symbol_index; |
| 709 | |
| 710 | /* COFF demands that undefined symbols come after all other symbols. |
| 711 | Since we don't need to impose this extra knowledge on all our |
| 712 | client programs, deal with that here. Sort the symbol table; |
| 713 | just move the undefined symbols to the end, leaving the rest |
| 714 | alone. The O'Reilly book says that defined global symbols come |
| 715 | at the end before the undefined symbols, so we do that here as |
| 716 | well. */ |
| 717 | /* @@ Do we have some condition we could test for, so we don't always |
| 718 | have to do this? I don't think relocatability is quite right, but |
| 719 | I'm not certain. [raeburn:19920508.1711EST] */ |
| 720 | { |
| 721 | asymbol **newsyms; |
| 722 | unsigned int i; |
| 723 | bfd_size_type amt; |
| 724 | |
| 725 | amt = sizeof (asymbol *) * ((bfd_size_type) symbol_count + 1); |
| 726 | newsyms = (asymbol **) bfd_alloc (bfd_ptr, amt); |
| 727 | if (!newsyms) |
| 728 | return FALSE; |
| 729 | bfd_ptr->outsymbols = newsyms; |
| 730 | for (i = 0; i < symbol_count; i++) |
| 731 | if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) != 0 |
| 732 | || (!bfd_is_und_section (symbol_ptr_ptr[i]->section) |
| 733 | && !bfd_is_com_section (symbol_ptr_ptr[i]->section) |
| 734 | && ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) != 0 |
| 735 | || ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK)) |
| 736 | == 0)))) |
| 737 | *newsyms++ = symbol_ptr_ptr[i]; |
| 738 | |
| 739 | for (i = 0; i < symbol_count; i++) |
| 740 | if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0 |
| 741 | && !bfd_is_und_section (symbol_ptr_ptr[i]->section) |
| 742 | && (bfd_is_com_section (symbol_ptr_ptr[i]->section) |
| 743 | || ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) == 0 |
| 744 | && ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK)) |
| 745 | != 0)))) |
| 746 | *newsyms++ = symbol_ptr_ptr[i]; |
| 747 | |
| 748 | *first_undef = newsyms - bfd_ptr->outsymbols; |
| 749 | |
| 750 | for (i = 0; i < symbol_count; i++) |
| 751 | if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0 |
| 752 | && bfd_is_und_section (symbol_ptr_ptr[i]->section)) |
| 753 | *newsyms++ = symbol_ptr_ptr[i]; |
| 754 | *newsyms = (asymbol *) NULL; |
| 755 | symbol_ptr_ptr = bfd_ptr->outsymbols; |
| 756 | } |
| 757 | |
| 758 | for (symbol_index = 0; symbol_index < symbol_count; symbol_index++) |
| 759 | { |
| 760 | coff_symbol_type *coff_symbol_ptr; |
| 761 | |
| 762 | coff_symbol_ptr = coff_symbol_from (symbol_ptr_ptr[symbol_index]); |
| 763 | symbol_ptr_ptr[symbol_index]->udata.i = symbol_index; |
| 764 | if (coff_symbol_ptr && coff_symbol_ptr->native) |
| 765 | { |
| 766 | combined_entry_type *s = coff_symbol_ptr->native; |
| 767 | int i; |
| 768 | |
| 769 | BFD_ASSERT (s->is_sym); |
| 770 | if (s->u.syment.n_sclass == C_FILE) |
| 771 | { |
| 772 | if (last_file != NULL) |
| 773 | last_file->n_value = native_index; |
| 774 | last_file = &(s->u.syment); |
| 775 | } |
| 776 | else |
| 777 | /* Modify the symbol values according to their section and |
| 778 | type. */ |
| 779 | fixup_symbol_value (bfd_ptr, coff_symbol_ptr, &(s->u.syment)); |
| 780 | |
| 781 | for (i = 0; i < s->u.syment.n_numaux + 1; i++) |
| 782 | s[i].offset = native_index++; |
| 783 | } |
| 784 | else |
| 785 | native_index++; |
| 786 | } |
| 787 | |
| 788 | obj_conv_table_size (bfd_ptr) = native_index; |
| 789 | |
| 790 | return TRUE; |
| 791 | } |
| 792 | |
| 793 | /* Run thorough the symbol table again, and fix it so that all |
| 794 | pointers to entries are changed to the entries' index in the output |
| 795 | symbol table. */ |
| 796 | |
| 797 | void |
| 798 | coff_mangle_symbols (bfd *bfd_ptr) |
| 799 | { |
| 800 | unsigned int symbol_count = bfd_get_symcount (bfd_ptr); |
| 801 | asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols; |
| 802 | unsigned int symbol_index; |
| 803 | |
| 804 | for (symbol_index = 0; symbol_index < symbol_count; symbol_index++) |
| 805 | { |
| 806 | coff_symbol_type *coff_symbol_ptr; |
| 807 | |
| 808 | coff_symbol_ptr = coff_symbol_from (symbol_ptr_ptr[symbol_index]); |
| 809 | if (coff_symbol_ptr && coff_symbol_ptr->native) |
| 810 | { |
| 811 | int i; |
| 812 | combined_entry_type *s = coff_symbol_ptr->native; |
| 813 | |
| 814 | BFD_ASSERT (s->is_sym); |
| 815 | if (s->fix_value) |
| 816 | { |
| 817 | /* FIXME: We should use a union here. */ |
| 818 | s->u.syment.n_value = |
| 819 | (bfd_hostptr_t) ((combined_entry_type *) |
| 820 | ((bfd_hostptr_t) s->u.syment.n_value))->offset; |
| 821 | s->fix_value = 0; |
| 822 | } |
| 823 | if (s->fix_line) |
| 824 | { |
| 825 | /* The value is the offset into the line number entries |
| 826 | for the symbol's section. On output, the symbol's |
| 827 | section should be N_DEBUG. */ |
| 828 | s->u.syment.n_value = |
| 829 | (coff_symbol_ptr->symbol.section->output_section->line_filepos |
| 830 | + s->u.syment.n_value * bfd_coff_linesz (bfd_ptr)); |
| 831 | coff_symbol_ptr->symbol.section = |
| 832 | coff_section_from_bfd_index (bfd_ptr, N_DEBUG); |
| 833 | BFD_ASSERT (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING); |
| 834 | } |
| 835 | for (i = 0; i < s->u.syment.n_numaux; i++) |
| 836 | { |
| 837 | combined_entry_type *a = s + i + 1; |
| 838 | |
| 839 | BFD_ASSERT (! a->is_sym); |
| 840 | if (a->fix_tag) |
| 841 | { |
| 842 | a->u.auxent.x_sym.x_tagndx.l = |
| 843 | a->u.auxent.x_sym.x_tagndx.p->offset; |
| 844 | a->fix_tag = 0; |
| 845 | } |
| 846 | if (a->fix_end) |
| 847 | { |
| 848 | a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l = |
| 849 | a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p->offset; |
| 850 | a->fix_end = 0; |
| 851 | } |
| 852 | if (a->fix_scnlen) |
| 853 | { |
| 854 | a->u.auxent.x_csect.x_scnlen.l = |
| 855 | a->u.auxent.x_csect.x_scnlen.p->offset; |
| 856 | a->fix_scnlen = 0; |
| 857 | } |
| 858 | } |
| 859 | } |
| 860 | } |
| 861 | } |
| 862 | |
| 863 | static void |
| 864 | coff_fix_symbol_name (bfd *abfd, |
| 865 | asymbol *symbol, |
| 866 | combined_entry_type *native, |
| 867 | bfd_size_type *string_size_p, |
| 868 | asection **debug_string_section_p, |
| 869 | bfd_size_type *debug_string_size_p) |
| 870 | { |
| 871 | unsigned int name_length; |
| 872 | union internal_auxent *auxent; |
| 873 | char *name = (char *) (symbol->name); |
| 874 | |
| 875 | if (name == NULL) |
| 876 | { |
| 877 | /* COFF symbols always have names, so we'll make one up. */ |
| 878 | symbol->name = "strange"; |
| 879 | name = (char *) symbol->name; |
| 880 | } |
| 881 | name_length = strlen (name); |
| 882 | |
| 883 | BFD_ASSERT (native->is_sym); |
| 884 | if (native->u.syment.n_sclass == C_FILE |
| 885 | && native->u.syment.n_numaux > 0) |
| 886 | { |
| 887 | unsigned int filnmlen; |
| 888 | |
| 889 | if (bfd_coff_force_symnames_in_strings (abfd)) |
| 890 | { |
| 891 | native->u.syment._n._n_n._n_offset = |
| 892 | (*string_size_p + STRING_SIZE_SIZE); |
| 893 | native->u.syment._n._n_n._n_zeroes = 0; |
| 894 | *string_size_p += 6; /* strlen(".file") + 1 */ |
| 895 | } |
| 896 | else |
| 897 | strncpy (native->u.syment._n._n_name, ".file", SYMNMLEN); |
| 898 | |
| 899 | BFD_ASSERT (! (native + 1)->is_sym); |
| 900 | auxent = &(native + 1)->u.auxent; |
| 901 | |
| 902 | filnmlen = bfd_coff_filnmlen (abfd); |
| 903 | |
| 904 | if (bfd_coff_long_filenames (abfd)) |
| 905 | { |
| 906 | if (name_length <= filnmlen) |
| 907 | strncpy (auxent->x_file.x_fname, name, filnmlen); |
| 908 | else |
| 909 | { |
| 910 | auxent->x_file.x_n.x_offset = *string_size_p + STRING_SIZE_SIZE; |
| 911 | auxent->x_file.x_n.x_zeroes = 0; |
| 912 | *string_size_p += name_length + 1; |
| 913 | } |
| 914 | } |
| 915 | else |
| 916 | { |
| 917 | strncpy (auxent->x_file.x_fname, name, filnmlen); |
| 918 | if (name_length > filnmlen) |
| 919 | name[filnmlen] = '\0'; |
| 920 | } |
| 921 | } |
| 922 | else |
| 923 | { |
| 924 | if (name_length <= SYMNMLEN && !bfd_coff_force_symnames_in_strings (abfd)) |
| 925 | /* This name will fit into the symbol neatly. */ |
| 926 | strncpy (native->u.syment._n._n_name, symbol->name, SYMNMLEN); |
| 927 | |
| 928 | else if (!bfd_coff_symname_in_debug (abfd, &native->u.syment)) |
| 929 | { |
| 930 | native->u.syment._n._n_n._n_offset = (*string_size_p |
| 931 | + STRING_SIZE_SIZE); |
| 932 | native->u.syment._n._n_n._n_zeroes = 0; |
| 933 | *string_size_p += name_length + 1; |
| 934 | } |
| 935 | else |
| 936 | { |
| 937 | file_ptr filepos; |
| 938 | bfd_byte buf[4]; |
| 939 | int prefix_len = bfd_coff_debug_string_prefix_length (abfd); |
| 940 | |
| 941 | /* This name should be written into the .debug section. For |
| 942 | some reason each name is preceded by a two byte length |
| 943 | and also followed by a null byte. FIXME: We assume that |
| 944 | the .debug section has already been created, and that it |
| 945 | is large enough. */ |
| 946 | if (*debug_string_section_p == (asection *) NULL) |
| 947 | *debug_string_section_p = bfd_get_section_by_name (abfd, ".debug"); |
| 948 | filepos = bfd_tell (abfd); |
| 949 | if (prefix_len == 4) |
| 950 | bfd_put_32 (abfd, (bfd_vma) (name_length + 1), buf); |
| 951 | else |
| 952 | bfd_put_16 (abfd, (bfd_vma) (name_length + 1), buf); |
| 953 | |
| 954 | if (!bfd_set_section_contents (abfd, |
| 955 | *debug_string_section_p, |
| 956 | (void *) buf, |
| 957 | (file_ptr) *debug_string_size_p, |
| 958 | (bfd_size_type) prefix_len) |
| 959 | || !bfd_set_section_contents (abfd, |
| 960 | *debug_string_section_p, |
| 961 | (void *) symbol->name, |
| 962 | (file_ptr) (*debug_string_size_p |
| 963 | + prefix_len), |
| 964 | (bfd_size_type) name_length + 1)) |
| 965 | abort (); |
| 966 | if (bfd_seek (abfd, filepos, SEEK_SET) != 0) |
| 967 | abort (); |
| 968 | native->u.syment._n._n_n._n_offset = |
| 969 | *debug_string_size_p + prefix_len; |
| 970 | native->u.syment._n._n_n._n_zeroes = 0; |
| 971 | *debug_string_size_p += name_length + 1 + prefix_len; |
| 972 | } |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | /* We need to keep track of the symbol index so that when we write out |
| 977 | the relocs we can get the index for a symbol. This method is a |
| 978 | hack. FIXME. */ |
| 979 | |
| 980 | #define set_index(symbol, idx) ((symbol)->udata.i = (idx)) |
| 981 | |
| 982 | /* Write a symbol out to a COFF file. */ |
| 983 | |
| 984 | static bfd_boolean |
| 985 | coff_write_symbol (bfd *abfd, |
| 986 | asymbol *symbol, |
| 987 | combined_entry_type *native, |
| 988 | bfd_vma *written, |
| 989 | bfd_size_type *string_size_p, |
| 990 | asection **debug_string_section_p, |
| 991 | bfd_size_type *debug_string_size_p) |
| 992 | { |
| 993 | unsigned int numaux = native->u.syment.n_numaux; |
| 994 | int type = native->u.syment.n_type; |
| 995 | int n_sclass = (int) native->u.syment.n_sclass; |
| 996 | asection *output_section = symbol->section->output_section |
| 997 | ? symbol->section->output_section |
| 998 | : symbol->section; |
| 999 | void * buf; |
| 1000 | bfd_size_type symesz; |
| 1001 | |
| 1002 | BFD_ASSERT (native->is_sym); |
| 1003 | |
| 1004 | if (native->u.syment.n_sclass == C_FILE) |
| 1005 | symbol->flags |= BSF_DEBUGGING; |
| 1006 | |
| 1007 | if (symbol->flags & BSF_DEBUGGING |
| 1008 | && bfd_is_abs_section (symbol->section)) |
| 1009 | native->u.syment.n_scnum = N_DEBUG; |
| 1010 | |
| 1011 | else if (bfd_is_abs_section (symbol->section)) |
| 1012 | native->u.syment.n_scnum = N_ABS; |
| 1013 | |
| 1014 | else if (bfd_is_und_section (symbol->section)) |
| 1015 | native->u.syment.n_scnum = N_UNDEF; |
| 1016 | |
| 1017 | else |
| 1018 | native->u.syment.n_scnum = |
| 1019 | output_section->target_index; |
| 1020 | |
| 1021 | coff_fix_symbol_name (abfd, symbol, native, string_size_p, |
| 1022 | debug_string_section_p, debug_string_size_p); |
| 1023 | |
| 1024 | symesz = bfd_coff_symesz (abfd); |
| 1025 | buf = bfd_alloc (abfd, symesz); |
| 1026 | if (!buf) |
| 1027 | return FALSE; |
| 1028 | bfd_coff_swap_sym_out (abfd, &native->u.syment, buf); |
| 1029 | if (bfd_bwrite (buf, symesz, abfd) != symesz) |
| 1030 | return FALSE; |
| 1031 | bfd_release (abfd, buf); |
| 1032 | |
| 1033 | if (native->u.syment.n_numaux > 0) |
| 1034 | { |
| 1035 | bfd_size_type auxesz; |
| 1036 | unsigned int j; |
| 1037 | |
| 1038 | auxesz = bfd_coff_auxesz (abfd); |
| 1039 | buf = bfd_alloc (abfd, auxesz); |
| 1040 | if (!buf) |
| 1041 | return FALSE; |
| 1042 | for (j = 0; j < native->u.syment.n_numaux; j++) |
| 1043 | { |
| 1044 | BFD_ASSERT (! (native + j + 1)->is_sym); |
| 1045 | bfd_coff_swap_aux_out (abfd, |
| 1046 | &((native + j + 1)->u.auxent), |
| 1047 | type, n_sclass, (int) j, |
| 1048 | native->u.syment.n_numaux, |
| 1049 | buf); |
| 1050 | if (bfd_bwrite (buf, auxesz, abfd) != auxesz) |
| 1051 | return FALSE; |
| 1052 | } |
| 1053 | bfd_release (abfd, buf); |
| 1054 | } |
| 1055 | |
| 1056 | /* Store the index for use when we write out the relocs. */ |
| 1057 | set_index (symbol, *written); |
| 1058 | |
| 1059 | *written += numaux + 1; |
| 1060 | return TRUE; |
| 1061 | } |
| 1062 | |
| 1063 | /* Write out a symbol to a COFF file that does not come from a COFF |
| 1064 | file originally. This symbol may have been created by the linker, |
| 1065 | or we may be linking a non COFF file to a COFF file. */ |
| 1066 | |
| 1067 | bfd_boolean |
| 1068 | coff_write_alien_symbol (bfd *abfd, |
| 1069 | asymbol *symbol, |
| 1070 | struct internal_syment *isym, |
| 1071 | union internal_auxent *iaux, |
| 1072 | bfd_vma *written, |
| 1073 | bfd_size_type *string_size_p, |
| 1074 | asection **debug_string_section_p, |
| 1075 | bfd_size_type *debug_string_size_p) |
| 1076 | { |
| 1077 | combined_entry_type *native; |
| 1078 | combined_entry_type dummy[2]; |
| 1079 | asection *output_section = symbol->section->output_section |
| 1080 | ? symbol->section->output_section |
| 1081 | : symbol->section; |
| 1082 | struct bfd_link_info *link_info = coff_data (abfd)->link_info; |
| 1083 | bfd_boolean ret; |
| 1084 | |
| 1085 | if ((!link_info || link_info->strip_discarded) |
| 1086 | && !bfd_is_abs_section (symbol->section) |
| 1087 | && symbol->section->output_section == bfd_abs_section_ptr) |
| 1088 | { |
| 1089 | symbol->name = ""; |
| 1090 | if (isym != NULL) |
| 1091 | memset (isym, 0, sizeof (*isym)); |
| 1092 | return TRUE; |
| 1093 | } |
| 1094 | native = dummy; |
| 1095 | native->is_sym = TRUE; |
| 1096 | native[1].is_sym = FALSE; |
| 1097 | native->u.syment.n_type = T_NULL; |
| 1098 | native->u.syment.n_flags = 0; |
| 1099 | native->u.syment.n_numaux = 0; |
| 1100 | if (bfd_is_und_section (symbol->section)) |
| 1101 | { |
| 1102 | native->u.syment.n_scnum = N_UNDEF; |
| 1103 | native->u.syment.n_value = symbol->value; |
| 1104 | } |
| 1105 | else if (bfd_is_com_section (symbol->section)) |
| 1106 | { |
| 1107 | native->u.syment.n_scnum = N_UNDEF; |
| 1108 | native->u.syment.n_value = symbol->value; |
| 1109 | } |
| 1110 | else if (symbol->flags & BSF_FILE) |
| 1111 | { |
| 1112 | native->u.syment.n_scnum = N_DEBUG; |
| 1113 | native->u.syment.n_numaux = 1; |
| 1114 | } |
| 1115 | else if (symbol->flags & BSF_DEBUGGING) |
| 1116 | { |
| 1117 | /* There isn't much point to writing out a debugging symbol |
| 1118 | unless we are prepared to convert it into COFF debugging |
| 1119 | format. So, we just ignore them. We must clobber the symbol |
| 1120 | name to keep it from being put in the string table. */ |
| 1121 | symbol->name = ""; |
| 1122 | if (isym != NULL) |
| 1123 | memset (isym, 0, sizeof (*isym)); |
| 1124 | return TRUE; |
| 1125 | } |
| 1126 | else |
| 1127 | { |
| 1128 | native->u.syment.n_scnum = output_section->target_index; |
| 1129 | native->u.syment.n_value = (symbol->value |
| 1130 | + symbol->section->output_offset); |
| 1131 | if (! obj_pe (abfd)) |
| 1132 | native->u.syment.n_value += output_section->vma; |
| 1133 | |
| 1134 | /* Copy the any flags from the file header into the symbol. |
| 1135 | FIXME: Why? */ |
| 1136 | { |
| 1137 | coff_symbol_type *c = coff_symbol_from (symbol); |
| 1138 | if (c != (coff_symbol_type *) NULL) |
| 1139 | native->u.syment.n_flags = bfd_asymbol_bfd (&c->symbol)->flags; |
| 1140 | } |
| 1141 | } |
| 1142 | |
| 1143 | native->u.syment.n_type = 0; |
| 1144 | if (symbol->flags & BSF_FILE) |
| 1145 | native->u.syment.n_sclass = C_FILE; |
| 1146 | else if (symbol->flags & BSF_LOCAL) |
| 1147 | native->u.syment.n_sclass = C_STAT; |
| 1148 | else if (symbol->flags & BSF_WEAK) |
| 1149 | native->u.syment.n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT; |
| 1150 | else |
| 1151 | native->u.syment.n_sclass = C_EXT; |
| 1152 | |
| 1153 | ret = coff_write_symbol (abfd, symbol, native, written, string_size_p, |
| 1154 | debug_string_section_p, debug_string_size_p); |
| 1155 | if (isym != NULL) |
| 1156 | *isym = native->u.syment; |
| 1157 | if (iaux != NULL && native->u.syment.n_numaux) |
| 1158 | *iaux = native[1].u.auxent; |
| 1159 | return ret; |
| 1160 | } |
| 1161 | |
| 1162 | /* Write a native symbol to a COFF file. */ |
| 1163 | |
| 1164 | static bfd_boolean |
| 1165 | coff_write_native_symbol (bfd *abfd, |
| 1166 | coff_symbol_type *symbol, |
| 1167 | bfd_vma *written, |
| 1168 | bfd_size_type *string_size_p, |
| 1169 | asection **debug_string_section_p, |
| 1170 | bfd_size_type *debug_string_size_p) |
| 1171 | { |
| 1172 | combined_entry_type *native = symbol->native; |
| 1173 | alent *lineno = symbol->lineno; |
| 1174 | struct bfd_link_info *link_info = coff_data (abfd)->link_info; |
| 1175 | |
| 1176 | if ((!link_info || link_info->strip_discarded) |
| 1177 | && !bfd_is_abs_section (symbol->symbol.section) |
| 1178 | && symbol->symbol.section->output_section == bfd_abs_section_ptr) |
| 1179 | { |
| 1180 | symbol->symbol.name = ""; |
| 1181 | return TRUE; |
| 1182 | } |
| 1183 | |
| 1184 | BFD_ASSERT (native->is_sym); |
| 1185 | /* If this symbol has an associated line number, we must store the |
| 1186 | symbol index in the line number field. We also tag the auxent to |
| 1187 | point to the right place in the lineno table. */ |
| 1188 | if (lineno && !symbol->done_lineno && symbol->symbol.section->owner != NULL) |
| 1189 | { |
| 1190 | unsigned int count = 0; |
| 1191 | |
| 1192 | lineno[count].u.offset = *written; |
| 1193 | if (native->u.syment.n_numaux) |
| 1194 | { |
| 1195 | union internal_auxent *a = &((native + 1)->u.auxent); |
| 1196 | |
| 1197 | a->x_sym.x_fcnary.x_fcn.x_lnnoptr = |
| 1198 | symbol->symbol.section->output_section->moving_line_filepos; |
| 1199 | } |
| 1200 | |
| 1201 | /* Count and relocate all other linenumbers. */ |
| 1202 | count++; |
| 1203 | while (lineno[count].line_number != 0) |
| 1204 | { |
| 1205 | lineno[count].u.offset += |
| 1206 | (symbol->symbol.section->output_section->vma |
| 1207 | + symbol->symbol.section->output_offset); |
| 1208 | count++; |
| 1209 | } |
| 1210 | symbol->done_lineno = TRUE; |
| 1211 | |
| 1212 | if (! bfd_is_const_section (symbol->symbol.section->output_section)) |
| 1213 | symbol->symbol.section->output_section->moving_line_filepos += |
| 1214 | count * bfd_coff_linesz (abfd); |
| 1215 | } |
| 1216 | |
| 1217 | return coff_write_symbol (abfd, &(symbol->symbol), native, written, |
| 1218 | string_size_p, debug_string_section_p, |
| 1219 | debug_string_size_p); |
| 1220 | } |
| 1221 | |
| 1222 | static void |
| 1223 | null_error_handler (const char *fmt ATTRIBUTE_UNUSED, |
| 1224 | va_list ap ATTRIBUTE_UNUSED) |
| 1225 | { |
| 1226 | } |
| 1227 | |
| 1228 | /* Write out the COFF symbols. */ |
| 1229 | |
| 1230 | bfd_boolean |
| 1231 | coff_write_symbols (bfd *abfd) |
| 1232 | { |
| 1233 | bfd_size_type string_size; |
| 1234 | asection *debug_string_section; |
| 1235 | bfd_size_type debug_string_size; |
| 1236 | unsigned int i; |
| 1237 | unsigned int limit = bfd_get_symcount (abfd); |
| 1238 | bfd_vma written = 0; |
| 1239 | asymbol **p; |
| 1240 | |
| 1241 | string_size = 0; |
| 1242 | debug_string_section = NULL; |
| 1243 | debug_string_size = 0; |
| 1244 | |
| 1245 | /* If this target supports long section names, they must be put into |
| 1246 | the string table. This is supported by PE. This code must |
| 1247 | handle section names just as they are handled in |
| 1248 | coff_write_object_contents. */ |
| 1249 | if (bfd_coff_long_section_names (abfd)) |
| 1250 | { |
| 1251 | asection *o; |
| 1252 | |
| 1253 | for (o = abfd->sections; o != NULL; o = o->next) |
| 1254 | { |
| 1255 | size_t len; |
| 1256 | |
| 1257 | len = strlen (o->name); |
| 1258 | if (len > SCNNMLEN) |
| 1259 | string_size += len + 1; |
| 1260 | } |
| 1261 | } |
| 1262 | |
| 1263 | /* Seek to the right place. */ |
| 1264 | if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0) |
| 1265 | return FALSE; |
| 1266 | |
| 1267 | /* Output all the symbols we have. */ |
| 1268 | written = 0; |
| 1269 | for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) |
| 1270 | { |
| 1271 | asymbol *symbol = *p; |
| 1272 | coff_symbol_type *c_symbol = coff_symbol_from (symbol); |
| 1273 | |
| 1274 | if (c_symbol == (coff_symbol_type *) NULL |
| 1275 | || c_symbol->native == (combined_entry_type *) NULL) |
| 1276 | { |
| 1277 | if (!coff_write_alien_symbol (abfd, symbol, NULL, NULL, &written, |
| 1278 | &string_size, &debug_string_section, |
| 1279 | &debug_string_size)) |
| 1280 | return FALSE; |
| 1281 | } |
| 1282 | else |
| 1283 | { |
| 1284 | if (coff_backend_info (abfd)->_bfd_coff_classify_symbol != NULL) |
| 1285 | { |
| 1286 | bfd_error_handler_type current_error_handler; |
| 1287 | enum coff_symbol_classification sym_class; |
| 1288 | unsigned char *n_sclass; |
| 1289 | |
| 1290 | /* Suppress error reporting by bfd_coff_classify_symbol. |
| 1291 | Error messages can be generated when we are processing a local |
| 1292 | symbol which has no associated section and we do not have to |
| 1293 | worry about this, all we need to know is that it is local. */ |
| 1294 | current_error_handler = bfd_set_error_handler (null_error_handler); |
| 1295 | BFD_ASSERT (c_symbol->native->is_sym); |
| 1296 | sym_class = bfd_coff_classify_symbol (abfd, |
| 1297 | &c_symbol->native->u.syment); |
| 1298 | (void) bfd_set_error_handler (current_error_handler); |
| 1299 | |
| 1300 | n_sclass = &c_symbol->native->u.syment.n_sclass; |
| 1301 | |
| 1302 | /* If the symbol class has been changed (eg objcopy/ld script/etc) |
| 1303 | we cannot retain the existing sclass from the original symbol. |
| 1304 | Weak symbols only have one valid sclass, so just set it always. |
| 1305 | If it is not local class and should be, set it C_STAT. |
| 1306 | If it is global and not classified as global, or if it is |
| 1307 | weak (which is also classified as global), set it C_EXT. */ |
| 1308 | |
| 1309 | if (symbol->flags & BSF_WEAK) |
| 1310 | *n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT; |
| 1311 | else if (symbol->flags & BSF_LOCAL && sym_class != COFF_SYMBOL_LOCAL) |
| 1312 | *n_sclass = C_STAT; |
| 1313 | else if (symbol->flags & BSF_GLOBAL |
| 1314 | && (sym_class != COFF_SYMBOL_GLOBAL |
| 1315 | #ifdef COFF_WITH_PE |
| 1316 | || *n_sclass == C_NT_WEAK |
| 1317 | #endif |
| 1318 | || *n_sclass == C_WEAKEXT)) |
| 1319 | c_symbol->native->u.syment.n_sclass = C_EXT; |
| 1320 | } |
| 1321 | |
| 1322 | if (!coff_write_native_symbol (abfd, c_symbol, &written, |
| 1323 | &string_size, &debug_string_section, |
| 1324 | &debug_string_size)) |
| 1325 | return FALSE; |
| 1326 | } |
| 1327 | } |
| 1328 | |
| 1329 | obj_raw_syment_count (abfd) = written; |
| 1330 | |
| 1331 | /* Now write out strings. */ |
| 1332 | if (string_size != 0) |
| 1333 | { |
| 1334 | unsigned int size = string_size + STRING_SIZE_SIZE; |
| 1335 | bfd_byte buffer[STRING_SIZE_SIZE]; |
| 1336 | |
| 1337 | #if STRING_SIZE_SIZE == 4 |
| 1338 | H_PUT_32 (abfd, size, buffer); |
| 1339 | #else |
| 1340 | #error Change H_PUT_32 |
| 1341 | #endif |
| 1342 | if (bfd_bwrite ((void *) buffer, (bfd_size_type) sizeof (buffer), abfd) |
| 1343 | != sizeof (buffer)) |
| 1344 | return FALSE; |
| 1345 | |
| 1346 | /* Handle long section names. This code must handle section |
| 1347 | names just as they are handled in coff_write_object_contents. */ |
| 1348 | if (bfd_coff_long_section_names (abfd)) |
| 1349 | { |
| 1350 | asection *o; |
| 1351 | |
| 1352 | for (o = abfd->sections; o != NULL; o = o->next) |
| 1353 | { |
| 1354 | size_t len; |
| 1355 | |
| 1356 | len = strlen (o->name); |
| 1357 | if (len > SCNNMLEN) |
| 1358 | { |
| 1359 | if (bfd_bwrite (o->name, (bfd_size_type) (len + 1), abfd) |
| 1360 | != len + 1) |
| 1361 | return FALSE; |
| 1362 | } |
| 1363 | } |
| 1364 | } |
| 1365 | |
| 1366 | for (p = abfd->outsymbols, i = 0; |
| 1367 | i < limit; |
| 1368 | i++, p++) |
| 1369 | { |
| 1370 | asymbol *q = *p; |
| 1371 | size_t name_length = strlen (q->name); |
| 1372 | coff_symbol_type *c_symbol = coff_symbol_from (q); |
| 1373 | size_t maxlen; |
| 1374 | |
| 1375 | /* Figure out whether the symbol name should go in the string |
| 1376 | table. Symbol names that are short enough are stored |
| 1377 | directly in the syment structure. File names permit a |
| 1378 | different, longer, length in the syment structure. On |
| 1379 | XCOFF, some symbol names are stored in the .debug section |
| 1380 | rather than in the string table. */ |
| 1381 | |
| 1382 | if (c_symbol == NULL |
| 1383 | || c_symbol->native == NULL) |
| 1384 | /* This is not a COFF symbol, so it certainly is not a |
| 1385 | file name, nor does it go in the .debug section. */ |
| 1386 | maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN; |
| 1387 | |
| 1388 | else if (! c_symbol->native->is_sym) |
| 1389 | maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN; |
| 1390 | |
| 1391 | else if (bfd_coff_symname_in_debug (abfd, |
| 1392 | &c_symbol->native->u.syment)) |
| 1393 | /* This symbol name is in the XCOFF .debug section. |
| 1394 | Don't write it into the string table. */ |
| 1395 | maxlen = name_length; |
| 1396 | |
| 1397 | else if (c_symbol->native->u.syment.n_sclass == C_FILE |
| 1398 | && c_symbol->native->u.syment.n_numaux > 0) |
| 1399 | { |
| 1400 | if (bfd_coff_force_symnames_in_strings (abfd)) |
| 1401 | { |
| 1402 | if (bfd_bwrite (".file", (bfd_size_type) 6, abfd) != 6) |
| 1403 | return FALSE; |
| 1404 | } |
| 1405 | maxlen = bfd_coff_filnmlen (abfd); |
| 1406 | } |
| 1407 | else |
| 1408 | maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN; |
| 1409 | |
| 1410 | if (name_length > maxlen) |
| 1411 | { |
| 1412 | if (bfd_bwrite ((void *) (q->name), (bfd_size_type) name_length + 1, |
| 1413 | abfd) != name_length + 1) |
| 1414 | return FALSE; |
| 1415 | } |
| 1416 | } |
| 1417 | } |
| 1418 | else |
| 1419 | { |
| 1420 | /* We would normally not write anything here, but we'll write |
| 1421 | out 4 so that any stupid coff reader which tries to read the |
| 1422 | string table even when there isn't one won't croak. */ |
| 1423 | unsigned int size = STRING_SIZE_SIZE; |
| 1424 | bfd_byte buffer[STRING_SIZE_SIZE]; |
| 1425 | |
| 1426 | #if STRING_SIZE_SIZE == 4 |
| 1427 | H_PUT_32 (abfd, size, buffer); |
| 1428 | #else |
| 1429 | #error Change H_PUT_32 |
| 1430 | #endif |
| 1431 | if (bfd_bwrite ((void *) buffer, (bfd_size_type) STRING_SIZE_SIZE, abfd) |
| 1432 | != STRING_SIZE_SIZE) |
| 1433 | return FALSE; |
| 1434 | } |
| 1435 | |
| 1436 | /* Make sure the .debug section was created to be the correct size. |
| 1437 | We should create it ourselves on the fly, but we don't because |
| 1438 | BFD won't let us write to any section until we know how large all |
| 1439 | the sections are. We could still do it by making another pass |
| 1440 | over the symbols. FIXME. */ |
| 1441 | BFD_ASSERT (debug_string_size == 0 |
| 1442 | || (debug_string_section != (asection *) NULL |
| 1443 | && (BFD_ALIGN (debug_string_size, |
| 1444 | 1 << debug_string_section->alignment_power) |
| 1445 | == debug_string_section->size))); |
| 1446 | |
| 1447 | return TRUE; |
| 1448 | } |
| 1449 | |
| 1450 | bfd_boolean |
| 1451 | coff_write_linenumbers (bfd *abfd) |
| 1452 | { |
| 1453 | asection *s; |
| 1454 | bfd_size_type linesz; |
| 1455 | void * buff; |
| 1456 | |
| 1457 | linesz = bfd_coff_linesz (abfd); |
| 1458 | buff = bfd_alloc (abfd, linesz); |
| 1459 | if (!buff) |
| 1460 | return FALSE; |
| 1461 | for (s = abfd->sections; s != (asection *) NULL; s = s->next) |
| 1462 | { |
| 1463 | if (s->lineno_count) |
| 1464 | { |
| 1465 | asymbol **q = abfd->outsymbols; |
| 1466 | if (bfd_seek (abfd, s->line_filepos, SEEK_SET) != 0) |
| 1467 | return FALSE; |
| 1468 | /* Find all the linenumbers in this section. */ |
| 1469 | while (*q) |
| 1470 | { |
| 1471 | asymbol *p = *q; |
| 1472 | if (p->section->output_section == s) |
| 1473 | { |
| 1474 | alent *l = |
| 1475 | BFD_SEND (bfd_asymbol_bfd (p), _get_lineno, |
| 1476 | (bfd_asymbol_bfd (p), p)); |
| 1477 | if (l) |
| 1478 | { |
| 1479 | /* Found a linenumber entry, output. */ |
| 1480 | struct internal_lineno out; |
| 1481 | |
| 1482 | memset ((void *) & out, 0, sizeof (out)); |
| 1483 | out.l_lnno = 0; |
| 1484 | out.l_addr.l_symndx = l->u.offset; |
| 1485 | bfd_coff_swap_lineno_out (abfd, &out, buff); |
| 1486 | if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd) |
| 1487 | != linesz) |
| 1488 | return FALSE; |
| 1489 | l++; |
| 1490 | while (l->line_number) |
| 1491 | { |
| 1492 | out.l_lnno = l->line_number; |
| 1493 | out.l_addr.l_symndx = l->u.offset; |
| 1494 | bfd_coff_swap_lineno_out (abfd, &out, buff); |
| 1495 | if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd) |
| 1496 | != linesz) |
| 1497 | return FALSE; |
| 1498 | l++; |
| 1499 | } |
| 1500 | } |
| 1501 | } |
| 1502 | q++; |
| 1503 | } |
| 1504 | } |
| 1505 | } |
| 1506 | bfd_release (abfd, buff); |
| 1507 | return TRUE; |
| 1508 | } |
| 1509 | |
| 1510 | alent * |
| 1511 | coff_get_lineno (bfd *ignore_abfd ATTRIBUTE_UNUSED, asymbol *symbol) |
| 1512 | { |
| 1513 | return coffsymbol (symbol)->lineno; |
| 1514 | } |
| 1515 | |
| 1516 | /* This function transforms the offsets into the symbol table into |
| 1517 | pointers to syments. */ |
| 1518 | |
| 1519 | static void |
| 1520 | coff_pointerize_aux (bfd *abfd, |
| 1521 | combined_entry_type *table_base, |
| 1522 | combined_entry_type *symbol, |
| 1523 | unsigned int indaux, |
| 1524 | combined_entry_type *auxent) |
| 1525 | { |
| 1526 | unsigned int type = symbol->u.syment.n_type; |
| 1527 | unsigned int n_sclass = symbol->u.syment.n_sclass; |
| 1528 | |
| 1529 | BFD_ASSERT (symbol->is_sym); |
| 1530 | if (coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook) |
| 1531 | { |
| 1532 | if ((*coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook) |
| 1533 | (abfd, table_base, symbol, indaux, auxent)) |
| 1534 | return; |
| 1535 | } |
| 1536 | |
| 1537 | /* Don't bother if this is a file or a section. */ |
| 1538 | if (n_sclass == C_STAT && type == T_NULL) |
| 1539 | return; |
| 1540 | if (n_sclass == C_FILE) |
| 1541 | return; |
| 1542 | |
| 1543 | BFD_ASSERT (! auxent->is_sym); |
| 1544 | /* Otherwise patch up. */ |
| 1545 | #define N_TMASK coff_data (abfd)->local_n_tmask |
| 1546 | #define N_BTSHFT coff_data (abfd)->local_n_btshft |
| 1547 | |
| 1548 | if ((ISFCN (type) || ISTAG (n_sclass) || n_sclass == C_BLOCK |
| 1549 | || n_sclass == C_FCN) |
| 1550 | && auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l > 0) |
| 1551 | { |
| 1552 | auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p = |
| 1553 | table_base + auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l; |
| 1554 | auxent->fix_end = 1; |
| 1555 | } |
| 1556 | /* A negative tagndx is meaningless, but the SCO 3.2v4 cc can |
| 1557 | generate one, so we must be careful to ignore it. */ |
| 1558 | if (auxent->u.auxent.x_sym.x_tagndx.l > 0) |
| 1559 | { |
| 1560 | auxent->u.auxent.x_sym.x_tagndx.p = |
| 1561 | table_base + auxent->u.auxent.x_sym.x_tagndx.l; |
| 1562 | auxent->fix_tag = 1; |
| 1563 | } |
| 1564 | } |
| 1565 | |
| 1566 | /* Allocate space for the ".debug" section, and read it. |
| 1567 | We did not read the debug section until now, because |
| 1568 | we didn't want to go to the trouble until someone needed it. */ |
| 1569 | |
| 1570 | static char * |
| 1571 | build_debug_section (bfd *abfd, asection ** sect_return) |
| 1572 | { |
| 1573 | char *debug_section; |
| 1574 | file_ptr position; |
| 1575 | bfd_size_type sec_size; |
| 1576 | |
| 1577 | asection *sect = bfd_get_section_by_name (abfd, ".debug"); |
| 1578 | |
| 1579 | if (!sect) |
| 1580 | { |
| 1581 | bfd_set_error (bfd_error_no_debug_section); |
| 1582 | return NULL; |
| 1583 | } |
| 1584 | |
| 1585 | sec_size = sect->size; |
| 1586 | debug_section = (char *) bfd_alloc (abfd, sec_size); |
| 1587 | if (debug_section == NULL) |
| 1588 | return NULL; |
| 1589 | |
| 1590 | /* Seek to the beginning of the `.debug' section and read it. |
| 1591 | Save the current position first; it is needed by our caller. |
| 1592 | Then read debug section and reset the file pointer. */ |
| 1593 | |
| 1594 | position = bfd_tell (abfd); |
| 1595 | if (bfd_seek (abfd, sect->filepos, SEEK_SET) != 0 |
| 1596 | || bfd_bread (debug_section, sec_size, abfd) != sec_size |
| 1597 | || bfd_seek (abfd, position, SEEK_SET) != 0) |
| 1598 | return NULL; |
| 1599 | |
| 1600 | * sect_return = sect; |
| 1601 | return debug_section; |
| 1602 | } |
| 1603 | |
| 1604 | /* Return a pointer to a malloc'd copy of 'name'. 'name' may not be |
| 1605 | \0-terminated, but will not exceed 'maxlen' characters. The copy *will* |
| 1606 | be \0-terminated. */ |
| 1607 | |
| 1608 | static char * |
| 1609 | copy_name (bfd *abfd, char *name, size_t maxlen) |
| 1610 | { |
| 1611 | size_t len; |
| 1612 | char *newname; |
| 1613 | |
| 1614 | for (len = 0; len < maxlen; ++len) |
| 1615 | if (name[len] == '\0') |
| 1616 | break; |
| 1617 | |
| 1618 | if ((newname = (char *) bfd_alloc (abfd, (bfd_size_type) len + 1)) == NULL) |
| 1619 | return NULL; |
| 1620 | |
| 1621 | strncpy (newname, name, len); |
| 1622 | newname[len] = '\0'; |
| 1623 | return newname; |
| 1624 | } |
| 1625 | |
| 1626 | /* Read in the external symbols. */ |
| 1627 | |
| 1628 | bfd_boolean |
| 1629 | _bfd_coff_get_external_symbols (bfd *abfd) |
| 1630 | { |
| 1631 | bfd_size_type symesz; |
| 1632 | bfd_size_type size; |
| 1633 | void * syms; |
| 1634 | |
| 1635 | if (obj_coff_external_syms (abfd) != NULL) |
| 1636 | return TRUE; |
| 1637 | |
| 1638 | symesz = bfd_coff_symesz (abfd); |
| 1639 | |
| 1640 | size = obj_raw_syment_count (abfd) * symesz; |
| 1641 | if (size == 0) |
| 1642 | return TRUE; |
| 1643 | /* Check for integer overflow and for unreasonable symbol counts. */ |
| 1644 | if (size < obj_raw_syment_count (abfd) |
| 1645 | || (bfd_get_file_size (abfd) > 0 |
| 1646 | && size > bfd_get_file_size (abfd))) |
| 1647 | |
| 1648 | { |
| 1649 | _bfd_error_handler (_("%B: corrupt symbol count: %#Lx"), |
| 1650 | abfd, obj_raw_syment_count (abfd)); |
| 1651 | return FALSE; |
| 1652 | } |
| 1653 | |
| 1654 | syms = bfd_malloc (size); |
| 1655 | if (syms == NULL) |
| 1656 | { |
| 1657 | /* PR 21013: Provide an error message when the alloc fails. */ |
| 1658 | _bfd_error_handler (_("%B: not enough memory to allocate space for %#Lx symbols of size %#Lx"), |
| 1659 | abfd, obj_raw_syment_count (abfd), symesz); |
| 1660 | return FALSE; |
| 1661 | } |
| 1662 | |
| 1663 | if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 |
| 1664 | || bfd_bread (syms, size, abfd) != size) |
| 1665 | { |
| 1666 | if (syms != NULL) |
| 1667 | free (syms); |
| 1668 | return FALSE; |
| 1669 | } |
| 1670 | |
| 1671 | obj_coff_external_syms (abfd) = syms; |
| 1672 | return TRUE; |
| 1673 | } |
| 1674 | |
| 1675 | /* Read in the external strings. The strings are not loaded until |
| 1676 | they are needed. This is because we have no simple way of |
| 1677 | detecting a missing string table in an archive. If the strings |
| 1678 | are loaded then the STRINGS and STRINGS_LEN fields in the |
| 1679 | coff_tdata structure will be set. */ |
| 1680 | |
| 1681 | const char * |
| 1682 | _bfd_coff_read_string_table (bfd *abfd) |
| 1683 | { |
| 1684 | char extstrsize[STRING_SIZE_SIZE]; |
| 1685 | bfd_size_type strsize; |
| 1686 | char *strings; |
| 1687 | file_ptr pos; |
| 1688 | |
| 1689 | if (obj_coff_strings (abfd) != NULL) |
| 1690 | return obj_coff_strings (abfd); |
| 1691 | |
| 1692 | if (obj_sym_filepos (abfd) == 0) |
| 1693 | { |
| 1694 | bfd_set_error (bfd_error_no_symbols); |
| 1695 | return NULL; |
| 1696 | } |
| 1697 | |
| 1698 | pos = obj_sym_filepos (abfd); |
| 1699 | pos += obj_raw_syment_count (abfd) * bfd_coff_symesz (abfd); |
| 1700 | if (bfd_seek (abfd, pos, SEEK_SET) != 0) |
| 1701 | return NULL; |
| 1702 | |
| 1703 | if (bfd_bread (extstrsize, (bfd_size_type) sizeof extstrsize, abfd) |
| 1704 | != sizeof extstrsize) |
| 1705 | { |
| 1706 | if (bfd_get_error () != bfd_error_file_truncated) |
| 1707 | return NULL; |
| 1708 | |
| 1709 | /* There is no string table. */ |
| 1710 | strsize = STRING_SIZE_SIZE; |
| 1711 | } |
| 1712 | else |
| 1713 | { |
| 1714 | #if STRING_SIZE_SIZE == 4 |
| 1715 | strsize = H_GET_32 (abfd, extstrsize); |
| 1716 | #else |
| 1717 | #error Change H_GET_32 |
| 1718 | #endif |
| 1719 | } |
| 1720 | |
| 1721 | if (strsize < STRING_SIZE_SIZE) |
| 1722 | { |
| 1723 | _bfd_error_handler |
| 1724 | /* xgettext: c-format */ |
| 1725 | (_("%B: bad string table size %Lu"), abfd, strsize); |
| 1726 | bfd_set_error (bfd_error_bad_value); |
| 1727 | return NULL; |
| 1728 | } |
| 1729 | |
| 1730 | strings = (char *) bfd_malloc (strsize + 1); |
| 1731 | if (strings == NULL) |
| 1732 | return NULL; |
| 1733 | |
| 1734 | /* PR 17521 file: 079-54929-0.004. |
| 1735 | A corrupt file could contain an index that points into the first |
| 1736 | STRING_SIZE_SIZE bytes of the string table, so make sure that |
| 1737 | they are zero. */ |
| 1738 | memset (strings, 0, STRING_SIZE_SIZE); |
| 1739 | |
| 1740 | if (bfd_bread (strings + STRING_SIZE_SIZE, strsize - STRING_SIZE_SIZE, abfd) |
| 1741 | != strsize - STRING_SIZE_SIZE) |
| 1742 | { |
| 1743 | free (strings); |
| 1744 | return NULL; |
| 1745 | } |
| 1746 | |
| 1747 | obj_coff_strings (abfd) = strings; |
| 1748 | obj_coff_strings_len (abfd) = strsize; |
| 1749 | /* Terminate the string table, just in case. */ |
| 1750 | strings[strsize] = 0; |
| 1751 | return strings; |
| 1752 | } |
| 1753 | |
| 1754 | /* Free up the external symbols and strings read from a COFF file. */ |
| 1755 | |
| 1756 | bfd_boolean |
| 1757 | _bfd_coff_free_symbols (bfd *abfd) |
| 1758 | { |
| 1759 | if (! bfd_family_coff (abfd)) |
| 1760 | return FALSE; |
| 1761 | |
| 1762 | if (obj_coff_external_syms (abfd) != NULL |
| 1763 | && ! obj_coff_keep_syms (abfd)) |
| 1764 | { |
| 1765 | free (obj_coff_external_syms (abfd)); |
| 1766 | obj_coff_external_syms (abfd) = NULL; |
| 1767 | } |
| 1768 | |
| 1769 | if (obj_coff_strings (abfd) != NULL |
| 1770 | && ! obj_coff_keep_strings (abfd)) |
| 1771 | { |
| 1772 | free (obj_coff_strings (abfd)); |
| 1773 | obj_coff_strings (abfd) = NULL; |
| 1774 | obj_coff_strings_len (abfd) = 0; |
| 1775 | } |
| 1776 | |
| 1777 | return TRUE; |
| 1778 | } |
| 1779 | |
| 1780 | /* Read a symbol table into freshly bfd_allocated memory, swap it, and |
| 1781 | knit the symbol names into a normalized form. By normalized here I |
| 1782 | mean that all symbols have an n_offset pointer that points to a null- |
| 1783 | terminated string. */ |
| 1784 | |
| 1785 | combined_entry_type * |
| 1786 | coff_get_normalized_symtab (bfd *abfd) |
| 1787 | { |
| 1788 | combined_entry_type *internal; |
| 1789 | combined_entry_type *internal_ptr; |
| 1790 | combined_entry_type *symbol_ptr; |
| 1791 | combined_entry_type *internal_end; |
| 1792 | size_t symesz; |
| 1793 | char *raw_src; |
| 1794 | char *raw_end; |
| 1795 | const char *string_table = NULL; |
| 1796 | asection * debug_sec = NULL; |
| 1797 | char *debug_sec_data = NULL; |
| 1798 | bfd_size_type size; |
| 1799 | |
| 1800 | if (obj_raw_syments (abfd) != NULL) |
| 1801 | return obj_raw_syments (abfd); |
| 1802 | |
| 1803 | if (! _bfd_coff_get_external_symbols (abfd)) |
| 1804 | return NULL; |
| 1805 | |
| 1806 | size = obj_raw_syment_count (abfd) * sizeof (combined_entry_type); |
| 1807 | /* Check for integer overflow. */ |
| 1808 | if (size < obj_raw_syment_count (abfd)) |
| 1809 | return NULL; |
| 1810 | internal = (combined_entry_type *) bfd_zalloc (abfd, size); |
| 1811 | if (internal == NULL && size != 0) |
| 1812 | return NULL; |
| 1813 | internal_end = internal + obj_raw_syment_count (abfd); |
| 1814 | |
| 1815 | raw_src = (char *) obj_coff_external_syms (abfd); |
| 1816 | |
| 1817 | /* Mark the end of the symbols. */ |
| 1818 | symesz = bfd_coff_symesz (abfd); |
| 1819 | raw_end = (char *) raw_src + obj_raw_syment_count (abfd) * symesz; |
| 1820 | |
| 1821 | /* FIXME SOMEDAY. A string table size of zero is very weird, but |
| 1822 | probably possible. If one shows up, it will probably kill us. */ |
| 1823 | |
| 1824 | /* Swap all the raw entries. */ |
| 1825 | for (internal_ptr = internal; |
| 1826 | raw_src < raw_end; |
| 1827 | raw_src += symesz, internal_ptr++) |
| 1828 | { |
| 1829 | unsigned int i; |
| 1830 | |
| 1831 | bfd_coff_swap_sym_in (abfd, (void *) raw_src, |
| 1832 | (void *) & internal_ptr->u.syment); |
| 1833 | symbol_ptr = internal_ptr; |
| 1834 | internal_ptr->is_sym = TRUE; |
| 1835 | |
| 1836 | /* PR 17512: file: 1353-1166-0.004. */ |
| 1837 | if (symbol_ptr->u.syment.n_sclass == C_FILE |
| 1838 | && symbol_ptr->u.syment.n_numaux > 0 |
| 1839 | && raw_src + symesz + symbol_ptr->u.syment.n_numaux |
| 1840 | * symesz > raw_end) |
| 1841 | { |
| 1842 | bfd_release (abfd, internal); |
| 1843 | return NULL; |
| 1844 | } |
| 1845 | |
| 1846 | for (i = 0; |
| 1847 | i < symbol_ptr->u.syment.n_numaux; |
| 1848 | i++) |
| 1849 | { |
| 1850 | internal_ptr++; |
| 1851 | /* PR 17512: Prevent buffer overrun. */ |
| 1852 | if (internal_ptr >= internal_end) |
| 1853 | { |
| 1854 | bfd_release (abfd, internal); |
| 1855 | return NULL; |
| 1856 | } |
| 1857 | |
| 1858 | raw_src += symesz; |
| 1859 | bfd_coff_swap_aux_in (abfd, (void *) raw_src, |
| 1860 | symbol_ptr->u.syment.n_type, |
| 1861 | symbol_ptr->u.syment.n_sclass, |
| 1862 | (int) i, symbol_ptr->u.syment.n_numaux, |
| 1863 | &(internal_ptr->u.auxent)); |
| 1864 | |
| 1865 | internal_ptr->is_sym = FALSE; |
| 1866 | coff_pointerize_aux (abfd, internal, symbol_ptr, i, |
| 1867 | internal_ptr); |
| 1868 | } |
| 1869 | } |
| 1870 | |
| 1871 | /* Free the raw symbols, but not the strings (if we have them). */ |
| 1872 | obj_coff_keep_strings (abfd) = TRUE; |
| 1873 | if (! _bfd_coff_free_symbols (abfd)) |
| 1874 | return NULL; |
| 1875 | |
| 1876 | for (internal_ptr = internal; internal_ptr < internal_end; |
| 1877 | internal_ptr++) |
| 1878 | { |
| 1879 | BFD_ASSERT (internal_ptr->is_sym); |
| 1880 | |
| 1881 | if (internal_ptr->u.syment.n_sclass == C_FILE |
| 1882 | && internal_ptr->u.syment.n_numaux > 0) |
| 1883 | { |
| 1884 | combined_entry_type * aux = internal_ptr + 1; |
| 1885 | |
| 1886 | /* Make a file symbol point to the name in the auxent, since |
| 1887 | the text ".file" is redundant. */ |
| 1888 | BFD_ASSERT (! aux->is_sym); |
| 1889 | |
| 1890 | if (aux->u.auxent.x_file.x_n.x_zeroes == 0) |
| 1891 | { |
| 1892 | /* The filename is a long one, point into the string table. */ |
| 1893 | if (string_table == NULL) |
| 1894 | { |
| 1895 | string_table = _bfd_coff_read_string_table (abfd); |
| 1896 | if (string_table == NULL) |
| 1897 | return NULL; |
| 1898 | } |
| 1899 | |
| 1900 | if ((bfd_size_type)(aux->u.auxent.x_file.x_n.x_offset) |
| 1901 | >= obj_coff_strings_len (abfd)) |
| 1902 | internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) _("<corrupt>"); |
| 1903 | else |
| 1904 | internal_ptr->u.syment._n._n_n._n_offset = |
| 1905 | (bfd_hostptr_t) (string_table + (aux->u.auxent.x_file.x_n.x_offset)); |
| 1906 | } |
| 1907 | else |
| 1908 | { |
| 1909 | /* Ordinary short filename, put into memory anyway. The |
| 1910 | Microsoft PE tools sometimes store a filename in |
| 1911 | multiple AUX entries. */ |
| 1912 | if (internal_ptr->u.syment.n_numaux > 1 |
| 1913 | && coff_data (abfd)->pe) |
| 1914 | internal_ptr->u.syment._n._n_n._n_offset = |
| 1915 | (bfd_hostptr_t) |
| 1916 | copy_name (abfd, |
| 1917 | aux->u.auxent.x_file.x_fname, |
| 1918 | internal_ptr->u.syment.n_numaux * symesz); |
| 1919 | else |
| 1920 | internal_ptr->u.syment._n._n_n._n_offset = |
| 1921 | ((bfd_hostptr_t) |
| 1922 | copy_name (abfd, |
| 1923 | aux->u.auxent.x_file.x_fname, |
| 1924 | (size_t) bfd_coff_filnmlen (abfd))); |
| 1925 | } |
| 1926 | } |
| 1927 | else |
| 1928 | { |
| 1929 | if (internal_ptr->u.syment._n._n_n._n_zeroes != 0) |
| 1930 | { |
| 1931 | /* This is a "short" name. Make it long. */ |
| 1932 | size_t i; |
| 1933 | char *newstring; |
| 1934 | |
| 1935 | /* Find the length of this string without walking into memory |
| 1936 | that isn't ours. */ |
| 1937 | for (i = 0; i < 8; ++i) |
| 1938 | if (internal_ptr->u.syment._n._n_name[i] == '\0') |
| 1939 | break; |
| 1940 | |
| 1941 | newstring = (char *) bfd_zalloc (abfd, (bfd_size_type) (i + 1)); |
| 1942 | if (newstring == NULL) |
| 1943 | return NULL; |
| 1944 | strncpy (newstring, internal_ptr->u.syment._n._n_name, i); |
| 1945 | internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) newstring; |
| 1946 | internal_ptr->u.syment._n._n_n._n_zeroes = 0; |
| 1947 | } |
| 1948 | else if (internal_ptr->u.syment._n._n_n._n_offset == 0) |
| 1949 | internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) ""; |
| 1950 | else if (!bfd_coff_symname_in_debug (abfd, &internal_ptr->u.syment)) |
| 1951 | { |
| 1952 | /* Long name already. Point symbol at the string in the |
| 1953 | table. */ |
| 1954 | if (string_table == NULL) |
| 1955 | { |
| 1956 | string_table = _bfd_coff_read_string_table (abfd); |
| 1957 | if (string_table == NULL) |
| 1958 | return NULL; |
| 1959 | } |
| 1960 | if (internal_ptr->u.syment._n._n_n._n_offset >= obj_coff_strings_len (abfd) |
| 1961 | || string_table + internal_ptr->u.syment._n._n_n._n_offset < string_table) |
| 1962 | internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) _("<corrupt>"); |
| 1963 | else |
| 1964 | internal_ptr->u.syment._n._n_n._n_offset = |
| 1965 | ((bfd_hostptr_t) |
| 1966 | (string_table |
| 1967 | + internal_ptr->u.syment._n._n_n._n_offset)); |
| 1968 | } |
| 1969 | else |
| 1970 | { |
| 1971 | /* Long name in debug section. Very similar. */ |
| 1972 | if (debug_sec_data == NULL) |
| 1973 | debug_sec_data = build_debug_section (abfd, & debug_sec); |
| 1974 | if (debug_sec_data != NULL) |
| 1975 | { |
| 1976 | BFD_ASSERT (debug_sec != NULL); |
| 1977 | /* PR binutils/17512: Catch out of range offsets into the debug data. */ |
| 1978 | if (internal_ptr->u.syment._n._n_n._n_offset > debug_sec->size |
| 1979 | || debug_sec_data + internal_ptr->u.syment._n._n_n._n_offset < debug_sec_data) |
| 1980 | internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) _("<corrupt>"); |
| 1981 | else |
| 1982 | internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) |
| 1983 | (debug_sec_data + internal_ptr->u.syment._n._n_n._n_offset); |
| 1984 | } |
| 1985 | else |
| 1986 | internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) ""; |
| 1987 | } |
| 1988 | } |
| 1989 | internal_ptr += internal_ptr->u.syment.n_numaux; |
| 1990 | } |
| 1991 | |
| 1992 | obj_raw_syments (abfd) = internal; |
| 1993 | BFD_ASSERT (obj_raw_syment_count (abfd) |
| 1994 | == (unsigned int) (internal_ptr - internal)); |
| 1995 | |
| 1996 | return internal; |
| 1997 | } |
| 1998 | |
| 1999 | long |
| 2000 | coff_get_reloc_upper_bound (bfd *abfd, sec_ptr asect) |
| 2001 | { |
| 2002 | if (bfd_get_format (abfd) != bfd_object) |
| 2003 | { |
| 2004 | bfd_set_error (bfd_error_invalid_operation); |
| 2005 | return -1; |
| 2006 | } |
| 2007 | return (asect->reloc_count + 1) * sizeof (arelent *); |
| 2008 | } |
| 2009 | |
| 2010 | asymbol * |
| 2011 | coff_make_empty_symbol (bfd *abfd) |
| 2012 | { |
| 2013 | bfd_size_type amt = sizeof (coff_symbol_type); |
| 2014 | coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_zalloc (abfd, amt); |
| 2015 | |
| 2016 | if (new_symbol == NULL) |
| 2017 | return NULL; |
| 2018 | new_symbol->symbol.section = 0; |
| 2019 | new_symbol->native = NULL; |
| 2020 | new_symbol->lineno = NULL; |
| 2021 | new_symbol->done_lineno = FALSE; |
| 2022 | new_symbol->symbol.the_bfd = abfd; |
| 2023 | |
| 2024 | return & new_symbol->symbol; |
| 2025 | } |
| 2026 | |
| 2027 | /* Make a debugging symbol. */ |
| 2028 | |
| 2029 | asymbol * |
| 2030 | coff_bfd_make_debug_symbol (bfd *abfd, |
| 2031 | void * ptr ATTRIBUTE_UNUSED, |
| 2032 | unsigned long sz ATTRIBUTE_UNUSED) |
| 2033 | { |
| 2034 | bfd_size_type amt = sizeof (coff_symbol_type); |
| 2035 | coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_alloc (abfd, amt); |
| 2036 | |
| 2037 | if (new_symbol == NULL) |
| 2038 | return NULL; |
| 2039 | /* @@ The 10 is a guess at a plausible maximum number of aux entries |
| 2040 | (but shouldn't be a constant). */ |
| 2041 | amt = sizeof (combined_entry_type) * 10; |
| 2042 | new_symbol->native = (combined_entry_type *) bfd_zalloc (abfd, amt); |
| 2043 | if (!new_symbol->native) |
| 2044 | return NULL; |
| 2045 | new_symbol->native->is_sym = TRUE; |
| 2046 | new_symbol->symbol.section = bfd_abs_section_ptr; |
| 2047 | new_symbol->symbol.flags = BSF_DEBUGGING; |
| 2048 | new_symbol->lineno = NULL; |
| 2049 | new_symbol->done_lineno = FALSE; |
| 2050 | new_symbol->symbol.the_bfd = abfd; |
| 2051 | |
| 2052 | return & new_symbol->symbol; |
| 2053 | } |
| 2054 | |
| 2055 | void |
| 2056 | coff_get_symbol_info (bfd *abfd, asymbol *symbol, symbol_info *ret) |
| 2057 | { |
| 2058 | bfd_symbol_info (symbol, ret); |
| 2059 | |
| 2060 | if (coffsymbol (symbol)->native != NULL |
| 2061 | && coffsymbol (symbol)->native->fix_value |
| 2062 | && coffsymbol (symbol)->native->is_sym) |
| 2063 | ret->value = coffsymbol (symbol)->native->u.syment.n_value - |
| 2064 | (bfd_hostptr_t) obj_raw_syments (abfd); |
| 2065 | } |
| 2066 | |
| 2067 | /* Print out information about COFF symbol. */ |
| 2068 | |
| 2069 | void |
| 2070 | coff_print_symbol (bfd *abfd, |
| 2071 | void * filep, |
| 2072 | asymbol *symbol, |
| 2073 | bfd_print_symbol_type how) |
| 2074 | { |
| 2075 | FILE * file = (FILE *) filep; |
| 2076 | |
| 2077 | switch (how) |
| 2078 | { |
| 2079 | case bfd_print_symbol_name: |
| 2080 | fprintf (file, "%s", symbol->name); |
| 2081 | break; |
| 2082 | |
| 2083 | case bfd_print_symbol_more: |
| 2084 | fprintf (file, "coff %s %s", |
| 2085 | coffsymbol (symbol)->native ? "n" : "g", |
| 2086 | coffsymbol (symbol)->lineno ? "l" : " "); |
| 2087 | break; |
| 2088 | |
| 2089 | case bfd_print_symbol_all: |
| 2090 | if (coffsymbol (symbol)->native) |
| 2091 | { |
| 2092 | bfd_vma val; |
| 2093 | unsigned int aux; |
| 2094 | combined_entry_type *combined = coffsymbol (symbol)->native; |
| 2095 | combined_entry_type *root = obj_raw_syments (abfd); |
| 2096 | struct lineno_cache_entry *l = coffsymbol (symbol)->lineno; |
| 2097 | |
| 2098 | fprintf (file, "[%3ld]", (long) (combined - root)); |
| 2099 | |
| 2100 | /* PR 17512: file: 079-33786-0.001:0.1. */ |
| 2101 | if (combined < obj_raw_syments (abfd) |
| 2102 | || combined >= obj_raw_syments (abfd) + obj_raw_syment_count (abfd)) |
| 2103 | { |
| 2104 | fprintf (file, _("<corrupt info> %s"), symbol->name); |
| 2105 | break; |
| 2106 | } |
| 2107 | |
| 2108 | BFD_ASSERT (combined->is_sym); |
| 2109 | if (! combined->fix_value) |
| 2110 | val = (bfd_vma) combined->u.syment.n_value; |
| 2111 | else |
| 2112 | val = combined->u.syment.n_value - (bfd_hostptr_t) root; |
| 2113 | |
| 2114 | fprintf (file, "(sec %2d)(fl 0x%02x)(ty %3x)(scl %3d) (nx %d) 0x", |
| 2115 | combined->u.syment.n_scnum, |
| 2116 | combined->u.syment.n_flags, |
| 2117 | combined->u.syment.n_type, |
| 2118 | combined->u.syment.n_sclass, |
| 2119 | combined->u.syment.n_numaux); |
| 2120 | bfd_fprintf_vma (abfd, file, val); |
| 2121 | fprintf (file, " %s", symbol->name); |
| 2122 | |
| 2123 | for (aux = 0; aux < combined->u.syment.n_numaux; aux++) |
| 2124 | { |
| 2125 | combined_entry_type *auxp = combined + aux + 1; |
| 2126 | long tagndx; |
| 2127 | |
| 2128 | BFD_ASSERT (! auxp->is_sym); |
| 2129 | if (auxp->fix_tag) |
| 2130 | tagndx = auxp->u.auxent.x_sym.x_tagndx.p - root; |
| 2131 | else |
| 2132 | tagndx = auxp->u.auxent.x_sym.x_tagndx.l; |
| 2133 | |
| 2134 | fprintf (file, "\n"); |
| 2135 | |
| 2136 | if (bfd_coff_print_aux (abfd, file, root, combined, auxp, aux)) |
| 2137 | continue; |
| 2138 | |
| 2139 | switch (combined->u.syment.n_sclass) |
| 2140 | { |
| 2141 | case C_FILE: |
| 2142 | fprintf (file, "File "); |
| 2143 | break; |
| 2144 | |
| 2145 | case C_STAT: |
| 2146 | if (combined->u.syment.n_type == T_NULL) |
| 2147 | /* Probably a section symbol ? */ |
| 2148 | { |
| 2149 | fprintf (file, "AUX scnlen 0x%lx nreloc %d nlnno %d", |
| 2150 | (unsigned long) auxp->u.auxent.x_scn.x_scnlen, |
| 2151 | auxp->u.auxent.x_scn.x_nreloc, |
| 2152 | auxp->u.auxent.x_scn.x_nlinno); |
| 2153 | if (auxp->u.auxent.x_scn.x_checksum != 0 |
| 2154 | || auxp->u.auxent.x_scn.x_associated != 0 |
| 2155 | || auxp->u.auxent.x_scn.x_comdat != 0) |
| 2156 | fprintf (file, " checksum 0x%lx assoc %d comdat %d", |
| 2157 | auxp->u.auxent.x_scn.x_checksum, |
| 2158 | auxp->u.auxent.x_scn.x_associated, |
| 2159 | auxp->u.auxent.x_scn.x_comdat); |
| 2160 | break; |
| 2161 | } |
| 2162 | /* Fall through. */ |
| 2163 | case C_EXT: |
| 2164 | case C_AIX_WEAKEXT: |
| 2165 | if (ISFCN (combined->u.syment.n_type)) |
| 2166 | { |
| 2167 | long next, llnos; |
| 2168 | |
| 2169 | if (auxp->fix_end) |
| 2170 | next = (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p |
| 2171 | - root); |
| 2172 | else |
| 2173 | next = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l; |
| 2174 | llnos = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| 2175 | fprintf (file, |
| 2176 | "AUX tagndx %ld ttlsiz 0x%lx lnnos %ld next %ld", |
| 2177 | tagndx, |
| 2178 | (unsigned long) auxp->u.auxent.x_sym.x_misc.x_fsize, |
| 2179 | llnos, next); |
| 2180 | break; |
| 2181 | } |
| 2182 | /* Fall through. */ |
| 2183 | default: |
| 2184 | fprintf (file, "AUX lnno %d size 0x%x tagndx %ld", |
| 2185 | auxp->u.auxent.x_sym.x_misc.x_lnsz.x_lnno, |
| 2186 | auxp->u.auxent.x_sym.x_misc.x_lnsz.x_size, |
| 2187 | tagndx); |
| 2188 | if (auxp->fix_end) |
| 2189 | fprintf (file, " endndx %ld", |
| 2190 | ((long) |
| 2191 | (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p |
| 2192 | - root))); |
| 2193 | break; |
| 2194 | } |
| 2195 | } |
| 2196 | |
| 2197 | if (l) |
| 2198 | { |
| 2199 | fprintf (file, "\n%s :", l->u.sym->name); |
| 2200 | l++; |
| 2201 | while (l->line_number) |
| 2202 | { |
| 2203 | if (l->line_number > 0) |
| 2204 | { |
| 2205 | fprintf (file, "\n%4d : ", l->line_number); |
| 2206 | bfd_fprintf_vma (abfd, file, l->u.offset + symbol->section->vma); |
| 2207 | } |
| 2208 | l++; |
| 2209 | } |
| 2210 | } |
| 2211 | } |
| 2212 | else |
| 2213 | { |
| 2214 | bfd_print_symbol_vandf (abfd, (void *) file, symbol); |
| 2215 | fprintf (file, " %-5s %s %s %s", |
| 2216 | symbol->section->name, |
| 2217 | coffsymbol (symbol)->native ? "n" : "g", |
| 2218 | coffsymbol (symbol)->lineno ? "l" : " ", |
| 2219 | symbol->name); |
| 2220 | } |
| 2221 | } |
| 2222 | } |
| 2223 | |
| 2224 | /* Return whether a symbol name implies a local symbol. In COFF, |
| 2225 | local symbols generally start with ``.L''. Most targets use this |
| 2226 | function for the is_local_label_name entry point, but some may |
| 2227 | override it. */ |
| 2228 | |
| 2229 | bfd_boolean |
| 2230 | _bfd_coff_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, |
| 2231 | const char *name) |
| 2232 | { |
| 2233 | return name[0] == '.' && name[1] == 'L'; |
| 2234 | } |
| 2235 | |
| 2236 | /* Provided a BFD, a section and an offset (in bytes, not octets) into the |
| 2237 | section, calculate and return the name of the source file and the line |
| 2238 | nearest to the wanted location. */ |
| 2239 | |
| 2240 | bfd_boolean |
| 2241 | coff_find_nearest_line_with_names (bfd *abfd, |
| 2242 | asymbol **symbols, |
| 2243 | asection *section, |
| 2244 | bfd_vma offset, |
| 2245 | const char **filename_ptr, |
| 2246 | const char **functionname_ptr, |
| 2247 | unsigned int *line_ptr, |
| 2248 | const struct dwarf_debug_section *debug_sections) |
| 2249 | { |
| 2250 | bfd_boolean found; |
| 2251 | unsigned int i; |
| 2252 | unsigned int line_base; |
| 2253 | coff_data_type *cof = coff_data (abfd); |
| 2254 | /* Run through the raw syments if available. */ |
| 2255 | combined_entry_type *p; |
| 2256 | combined_entry_type *pend; |
| 2257 | alent *l; |
| 2258 | struct coff_section_tdata *sec_data; |
| 2259 | bfd_size_type amt; |
| 2260 | |
| 2261 | /* Before looking through the symbol table, try to use a .stab |
| 2262 | section to find the information. */ |
| 2263 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
| 2264 | &found, filename_ptr, |
| 2265 | functionname_ptr, line_ptr, |
| 2266 | &coff_data(abfd)->line_info)) |
| 2267 | return FALSE; |
| 2268 | |
| 2269 | if (found) |
| 2270 | return TRUE; |
| 2271 | |
| 2272 | /* Also try examining DWARF2 debugging information. */ |
| 2273 | if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, |
| 2274 | filename_ptr, functionname_ptr, |
| 2275 | line_ptr, NULL, debug_sections, 0, |
| 2276 | &coff_data(abfd)->dwarf2_find_line_info)) |
| 2277 | return TRUE; |
| 2278 | |
| 2279 | sec_data = coff_section_data (abfd, section); |
| 2280 | |
| 2281 | /* If the DWARF lookup failed, but there is DWARF information available |
| 2282 | then the problem might be that the file has been rebased. This tool |
| 2283 | changes the VMAs of all the sections, but it does not update the DWARF |
| 2284 | information. So try again, using a bias against the address sought. */ |
| 2285 | if (coff_data (abfd)->dwarf2_find_line_info != NULL) |
| 2286 | { |
| 2287 | bfd_signed_vma bias; |
| 2288 | |
| 2289 | /* Create a cache of the result for the next call. */ |
| 2290 | if (sec_data == NULL && section->owner == abfd) |
| 2291 | { |
| 2292 | amt = sizeof (struct coff_section_tdata); |
| 2293 | section->used_by_bfd = bfd_zalloc (abfd, amt); |
| 2294 | sec_data = (struct coff_section_tdata *) section->used_by_bfd; |
| 2295 | } |
| 2296 | |
| 2297 | if (sec_data != NULL && sec_data->saved_bias) |
| 2298 | bias = sec_data->saved_bias; |
| 2299 | else |
| 2300 | { |
| 2301 | bias = _bfd_dwarf2_find_symbol_bias (symbols, |
| 2302 | & coff_data (abfd)->dwarf2_find_line_info); |
| 2303 | if (sec_data) |
| 2304 | { |
| 2305 | sec_data->saved_bias = TRUE; |
| 2306 | sec_data->bias = bias; |
| 2307 | } |
| 2308 | } |
| 2309 | |
| 2310 | if (bias |
| 2311 | && _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, |
| 2312 | offset + bias, |
| 2313 | filename_ptr, functionname_ptr, |
| 2314 | line_ptr, NULL, debug_sections, 0, |
| 2315 | &coff_data(abfd)->dwarf2_find_line_info)) |
| 2316 | return TRUE; |
| 2317 | } |
| 2318 | |
| 2319 | *filename_ptr = 0; |
| 2320 | *functionname_ptr = 0; |
| 2321 | *line_ptr = 0; |
| 2322 | |
| 2323 | /* Don't try and find line numbers in a non coff file. */ |
| 2324 | if (!bfd_family_coff (abfd)) |
| 2325 | return FALSE; |
| 2326 | |
| 2327 | if (cof == NULL) |
| 2328 | return FALSE; |
| 2329 | |
| 2330 | /* Find the first C_FILE symbol. */ |
| 2331 | p = cof->raw_syments; |
| 2332 | if (!p) |
| 2333 | return FALSE; |
| 2334 | |
| 2335 | pend = p + cof->raw_syment_count; |
| 2336 | while (p < pend) |
| 2337 | { |
| 2338 | BFD_ASSERT (p->is_sym); |
| 2339 | if (p->u.syment.n_sclass == C_FILE) |
| 2340 | break; |
| 2341 | p += 1 + p->u.syment.n_numaux; |
| 2342 | } |
| 2343 | |
| 2344 | if (p < pend) |
| 2345 | { |
| 2346 | bfd_vma sec_vma; |
| 2347 | bfd_vma maxdiff; |
| 2348 | |
| 2349 | /* Look through the C_FILE symbols to find the best one. */ |
| 2350 | sec_vma = bfd_get_section_vma (abfd, section); |
| 2351 | *filename_ptr = (char *) p->u.syment._n._n_n._n_offset; |
| 2352 | maxdiff = (bfd_vma) 0 - (bfd_vma) 1; |
| 2353 | while (1) |
| 2354 | { |
| 2355 | bfd_vma file_addr; |
| 2356 | combined_entry_type *p2; |
| 2357 | |
| 2358 | for (p2 = p + 1 + p->u.syment.n_numaux; |
| 2359 | p2 < pend; |
| 2360 | p2 += 1 + p2->u.syment.n_numaux) |
| 2361 | { |
| 2362 | BFD_ASSERT (p2->is_sym); |
| 2363 | if (p2->u.syment.n_scnum > 0 |
| 2364 | && (section |
| 2365 | == coff_section_from_bfd_index (abfd, |
| 2366 | p2->u.syment.n_scnum))) |
| 2367 | break; |
| 2368 | if (p2->u.syment.n_sclass == C_FILE) |
| 2369 | { |
| 2370 | p2 = pend; |
| 2371 | break; |
| 2372 | } |
| 2373 | } |
| 2374 | if (p2 >= pend) |
| 2375 | break; |
| 2376 | |
| 2377 | file_addr = (bfd_vma) p2->u.syment.n_value; |
| 2378 | /* PR 11512: Include the section address of the function name symbol. */ |
| 2379 | if (p2->u.syment.n_scnum > 0) |
| 2380 | file_addr += coff_section_from_bfd_index (abfd, |
| 2381 | p2->u.syment.n_scnum)->vma; |
| 2382 | /* We use <= MAXDIFF here so that if we get a zero length |
| 2383 | file, we actually use the next file entry. */ |
| 2384 | if (p2 < pend |
| 2385 | && offset + sec_vma >= file_addr |
| 2386 | && offset + sec_vma - file_addr <= maxdiff) |
| 2387 | { |
| 2388 | *filename_ptr = (char *) p->u.syment._n._n_n._n_offset; |
| 2389 | maxdiff = offset + sec_vma - p2->u.syment.n_value; |
| 2390 | } |
| 2391 | |
| 2392 | /* Avoid endless loops on erroneous files by ensuring that |
| 2393 | we always move forward in the file. */ |
| 2394 | if (p >= cof->raw_syments + p->u.syment.n_value) |
| 2395 | break; |
| 2396 | |
| 2397 | p = cof->raw_syments + p->u.syment.n_value; |
| 2398 | if (p > pend || p->u.syment.n_sclass != C_FILE) |
| 2399 | break; |
| 2400 | } |
| 2401 | } |
| 2402 | |
| 2403 | if (section->lineno_count == 0) |
| 2404 | { |
| 2405 | *functionname_ptr = NULL; |
| 2406 | *line_ptr = 0; |
| 2407 | return TRUE; |
| 2408 | } |
| 2409 | |
| 2410 | /* Now wander though the raw linenumbers of the section. |
| 2411 | If we have been called on this section before, and the offset |
| 2412 | we want is further down then we can prime the lookup loop. */ |
| 2413 | if (sec_data != NULL |
| 2414 | && sec_data->i > 0 |
| 2415 | && offset >= sec_data->offset) |
| 2416 | { |
| 2417 | i = sec_data->i; |
| 2418 | *functionname_ptr = sec_data->function; |
| 2419 | line_base = sec_data->line_base; |
| 2420 | } |
| 2421 | else |
| 2422 | { |
| 2423 | i = 0; |
| 2424 | line_base = 0; |
| 2425 | } |
| 2426 | |
| 2427 | if (section->lineno != NULL) |
| 2428 | { |
| 2429 | bfd_vma last_value = 0; |
| 2430 | |
| 2431 | l = §ion->lineno[i]; |
| 2432 | |
| 2433 | for (; i < section->lineno_count; i++) |
| 2434 | { |
| 2435 | if (l->line_number == 0) |
| 2436 | { |
| 2437 | /* Get the symbol this line number points at. */ |
| 2438 | coff_symbol_type *coff = (coff_symbol_type *) (l->u.sym); |
| 2439 | if (coff->symbol.value > offset) |
| 2440 | break; |
| 2441 | |
| 2442 | *functionname_ptr = coff->symbol.name; |
| 2443 | last_value = coff->symbol.value; |
| 2444 | if (coff->native) |
| 2445 | { |
| 2446 | combined_entry_type *s = coff->native; |
| 2447 | |
| 2448 | BFD_ASSERT (s->is_sym); |
| 2449 | s = s + 1 + s->u.syment.n_numaux; |
| 2450 | |
| 2451 | /* In XCOFF a debugging symbol can follow the |
| 2452 | function symbol. */ |
| 2453 | if (s->u.syment.n_scnum == N_DEBUG) |
| 2454 | s = s + 1 + s->u.syment.n_numaux; |
| 2455 | |
| 2456 | /* S should now point to the .bf of the function. */ |
| 2457 | if (s->u.syment.n_numaux) |
| 2458 | { |
| 2459 | /* The linenumber is stored in the auxent. */ |
| 2460 | union internal_auxent *a = &((s + 1)->u.auxent); |
| 2461 | |
| 2462 | line_base = a->x_sym.x_misc.x_lnsz.x_lnno; |
| 2463 | *line_ptr = line_base; |
| 2464 | } |
| 2465 | } |
| 2466 | } |
| 2467 | else |
| 2468 | { |
| 2469 | if (l->u.offset > offset) |
| 2470 | break; |
| 2471 | *line_ptr = l->line_number + line_base - 1; |
| 2472 | } |
| 2473 | l++; |
| 2474 | } |
| 2475 | |
| 2476 | /* If we fell off the end of the loop, then assume that this |
| 2477 | symbol has no line number info. Otherwise, symbols with no |
| 2478 | line number info get reported with the line number of the |
| 2479 | last line of the last symbol which does have line number |
| 2480 | info. We use 0x100 as a slop to account for cases where the |
| 2481 | last line has executable code. */ |
| 2482 | if (i >= section->lineno_count |
| 2483 | && last_value != 0 |
| 2484 | && offset - last_value > 0x100) |
| 2485 | { |
| 2486 | *functionname_ptr = NULL; |
| 2487 | *line_ptr = 0; |
| 2488 | } |
| 2489 | } |
| 2490 | |
| 2491 | /* Cache the results for the next call. */ |
| 2492 | if (sec_data == NULL && section->owner == abfd) |
| 2493 | { |
| 2494 | amt = sizeof (struct coff_section_tdata); |
| 2495 | section->used_by_bfd = bfd_zalloc (abfd, amt); |
| 2496 | sec_data = (struct coff_section_tdata *) section->used_by_bfd; |
| 2497 | } |
| 2498 | |
| 2499 | if (sec_data != NULL) |
| 2500 | { |
| 2501 | sec_data->offset = offset; |
| 2502 | sec_data->i = i - 1; |
| 2503 | sec_data->function = *functionname_ptr; |
| 2504 | sec_data->line_base = line_base; |
| 2505 | } |
| 2506 | |
| 2507 | return TRUE; |
| 2508 | } |
| 2509 | |
| 2510 | bfd_boolean |
| 2511 | coff_find_nearest_line (bfd *abfd, |
| 2512 | asymbol **symbols, |
| 2513 | asection *section, |
| 2514 | bfd_vma offset, |
| 2515 | const char **filename_ptr, |
| 2516 | const char **functionname_ptr, |
| 2517 | unsigned int *line_ptr, |
| 2518 | unsigned int *discriminator_ptr) |
| 2519 | { |
| 2520 | if (discriminator_ptr) |
| 2521 | *discriminator_ptr = 0; |
| 2522 | return coff_find_nearest_line_with_names (abfd, symbols, section, offset, |
| 2523 | filename_ptr, functionname_ptr, |
| 2524 | line_ptr, dwarf_debug_sections); |
| 2525 | } |
| 2526 | |
| 2527 | bfd_boolean |
| 2528 | coff_find_inliner_info (bfd *abfd, |
| 2529 | const char **filename_ptr, |
| 2530 | const char **functionname_ptr, |
| 2531 | unsigned int *line_ptr) |
| 2532 | { |
| 2533 | bfd_boolean found; |
| 2534 | |
| 2535 | found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr, |
| 2536 | functionname_ptr, line_ptr, |
| 2537 | &coff_data(abfd)->dwarf2_find_line_info); |
| 2538 | return (found); |
| 2539 | } |
| 2540 | |
| 2541 | int |
| 2542 | coff_sizeof_headers (bfd *abfd, struct bfd_link_info *info) |
| 2543 | { |
| 2544 | size_t size; |
| 2545 | |
| 2546 | if (!bfd_link_relocatable (info)) |
| 2547 | size = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd); |
| 2548 | else |
| 2549 | size = bfd_coff_filhsz (abfd); |
| 2550 | |
| 2551 | size += abfd->section_count * bfd_coff_scnhsz (abfd); |
| 2552 | return size; |
| 2553 | } |
| 2554 | |
| 2555 | /* Change the class of a coff symbol held by BFD. */ |
| 2556 | |
| 2557 | bfd_boolean |
| 2558 | bfd_coff_set_symbol_class (bfd * abfd, |
| 2559 | asymbol * symbol, |
| 2560 | unsigned int symbol_class) |
| 2561 | { |
| 2562 | coff_symbol_type * csym; |
| 2563 | |
| 2564 | csym = coff_symbol_from (symbol); |
| 2565 | if (csym == NULL) |
| 2566 | { |
| 2567 | bfd_set_error (bfd_error_invalid_operation); |
| 2568 | return FALSE; |
| 2569 | } |
| 2570 | else if (csym->native == NULL) |
| 2571 | { |
| 2572 | /* This is an alien symbol which no native coff backend data. |
| 2573 | We cheat here by creating a fake native entry for it and |
| 2574 | then filling in the class. This code is based on that in |
| 2575 | coff_write_alien_symbol(). */ |
| 2576 | |
| 2577 | combined_entry_type * native; |
| 2578 | bfd_size_type amt = sizeof (* native); |
| 2579 | |
| 2580 | native = (combined_entry_type *) bfd_zalloc (abfd, amt); |
| 2581 | if (native == NULL) |
| 2582 | return FALSE; |
| 2583 | |
| 2584 | native->is_sym = TRUE; |
| 2585 | native->u.syment.n_type = T_NULL; |
| 2586 | native->u.syment.n_sclass = symbol_class; |
| 2587 | |
| 2588 | if (bfd_is_und_section (symbol->section)) |
| 2589 | { |
| 2590 | native->u.syment.n_scnum = N_UNDEF; |
| 2591 | native->u.syment.n_value = symbol->value; |
| 2592 | } |
| 2593 | else if (bfd_is_com_section (symbol->section)) |
| 2594 | { |
| 2595 | native->u.syment.n_scnum = N_UNDEF; |
| 2596 | native->u.syment.n_value = symbol->value; |
| 2597 | } |
| 2598 | else |
| 2599 | { |
| 2600 | native->u.syment.n_scnum = |
| 2601 | symbol->section->output_section->target_index; |
| 2602 | native->u.syment.n_value = (symbol->value |
| 2603 | + symbol->section->output_offset); |
| 2604 | if (! obj_pe (abfd)) |
| 2605 | native->u.syment.n_value += symbol->section->output_section->vma; |
| 2606 | |
| 2607 | /* Copy the any flags from the file header into the symbol. |
| 2608 | FIXME: Why? */ |
| 2609 | native->u.syment.n_flags = bfd_asymbol_bfd (& csym->symbol)->flags; |
| 2610 | } |
| 2611 | |
| 2612 | csym->native = native; |
| 2613 | } |
| 2614 | else |
| 2615 | csym->native->u.syment.n_sclass = symbol_class; |
| 2616 | |
| 2617 | return TRUE; |
| 2618 | } |
| 2619 | |
| 2620 | bfd_boolean |
| 2621 | _bfd_coff_section_already_linked (bfd *abfd, |
| 2622 | asection *sec, |
| 2623 | struct bfd_link_info *info) |
| 2624 | { |
| 2625 | flagword flags; |
| 2626 | const char *name, *key; |
| 2627 | struct bfd_section_already_linked *l; |
| 2628 | struct bfd_section_already_linked_hash_entry *already_linked_list; |
| 2629 | struct coff_comdat_info *s_comdat; |
| 2630 | |
| 2631 | flags = sec->flags; |
| 2632 | if ((flags & SEC_LINK_ONCE) == 0) |
| 2633 | return FALSE; |
| 2634 | |
| 2635 | /* The COFF backend linker doesn't support group sections. */ |
| 2636 | if ((flags & SEC_GROUP) != 0) |
| 2637 | return FALSE; |
| 2638 | |
| 2639 | name = bfd_get_section_name (abfd, sec); |
| 2640 | s_comdat = bfd_coff_get_comdat_section (abfd, sec); |
| 2641 | |
| 2642 | if (s_comdat != NULL) |
| 2643 | key = s_comdat->name; |
| 2644 | else |
| 2645 | { |
| 2646 | if (CONST_STRNEQ (name, ".gnu.linkonce.") |
| 2647 | && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
| 2648 | key++; |
| 2649 | else |
| 2650 | /* FIXME: gcc as of 2011-09 emits sections like .text$<key>, |
| 2651 | .xdata$<key> and .pdata$<key> only the first of which has a |
| 2652 | comdat key. Should these all match the LTO IR key? */ |
| 2653 | key = name; |
| 2654 | } |
| 2655 | |
| 2656 | already_linked_list = bfd_section_already_linked_table_lookup (key); |
| 2657 | |
| 2658 | for (l = already_linked_list->entry; l != NULL; l = l->next) |
| 2659 | { |
| 2660 | struct coff_comdat_info *l_comdat; |
| 2661 | |
| 2662 | l_comdat = bfd_coff_get_comdat_section (l->sec->owner, l->sec); |
| 2663 | |
| 2664 | /* The section names must match, and both sections must be |
| 2665 | comdat and have the same comdat name, or both sections must |
| 2666 | be non-comdat. LTO IR plugin sections are an exception. They |
| 2667 | are always named .gnu.linkonce.t.<key> (<key> is some string) |
| 2668 | and match any comdat section with comdat name of <key>, and |
| 2669 | any linkonce section with the same suffix, ie. |
| 2670 | .gnu.linkonce.*.<key>. */ |
| 2671 | if (((s_comdat != NULL) == (l_comdat != NULL) |
| 2672 | && strcmp (name, l->sec->name) == 0) |
| 2673 | || (l->sec->owner->flags & BFD_PLUGIN) != 0) |
| 2674 | { |
| 2675 | /* The section has already been linked. See if we should |
| 2676 | issue a warning. */ |
| 2677 | return _bfd_handle_already_linked (sec, l, info); |
| 2678 | } |
| 2679 | } |
| 2680 | |
| 2681 | /* This is the first section with this name. Record it. */ |
| 2682 | if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
| 2683 | info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
| 2684 | return FALSE; |
| 2685 | } |
| 2686 | |
| 2687 | /* Initialize COOKIE for input bfd ABFD. */ |
| 2688 | |
| 2689 | static bfd_boolean |
| 2690 | init_reloc_cookie (struct coff_reloc_cookie *cookie, |
| 2691 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 2692 | bfd *abfd) |
| 2693 | { |
| 2694 | /* Sometimes the symbol table does not yet have been loaded here. */ |
| 2695 | bfd_coff_slurp_symbol_table (abfd); |
| 2696 | |
| 2697 | cookie->abfd = abfd; |
| 2698 | cookie->sym_hashes = obj_coff_sym_hashes (abfd); |
| 2699 | |
| 2700 | cookie->symbols = obj_symbols (abfd); |
| 2701 | |
| 2702 | return TRUE; |
| 2703 | } |
| 2704 | |
| 2705 | /* Free the memory allocated by init_reloc_cookie, if appropriate. */ |
| 2706 | |
| 2707 | static void |
| 2708 | fini_reloc_cookie (struct coff_reloc_cookie *cookie ATTRIBUTE_UNUSED, |
| 2709 | bfd *abfd ATTRIBUTE_UNUSED) |
| 2710 | { |
| 2711 | /* Nothing to do. */ |
| 2712 | } |
| 2713 | |
| 2714 | /* Initialize the relocation information in COOKIE for input section SEC |
| 2715 | of input bfd ABFD. */ |
| 2716 | |
| 2717 | static bfd_boolean |
| 2718 | init_reloc_cookie_rels (struct coff_reloc_cookie *cookie, |
| 2719 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 2720 | bfd *abfd, |
| 2721 | asection *sec) |
| 2722 | { |
| 2723 | if (sec->reloc_count == 0) |
| 2724 | { |
| 2725 | cookie->rels = NULL; |
| 2726 | cookie->relend = NULL; |
| 2727 | cookie->rel = NULL; |
| 2728 | return TRUE; |
| 2729 | } |
| 2730 | |
| 2731 | cookie->rels = _bfd_coff_read_internal_relocs (abfd, sec, FALSE, NULL, 0, NULL); |
| 2732 | |
| 2733 | if (cookie->rels == NULL) |
| 2734 | return FALSE; |
| 2735 | |
| 2736 | cookie->rel = cookie->rels; |
| 2737 | cookie->relend = (cookie->rels + sec->reloc_count); |
| 2738 | return TRUE; |
| 2739 | } |
| 2740 | |
| 2741 | /* Free the memory allocated by init_reloc_cookie_rels, |
| 2742 | if appropriate. */ |
| 2743 | |
| 2744 | static void |
| 2745 | fini_reloc_cookie_rels (struct coff_reloc_cookie *cookie, |
| 2746 | asection *sec) |
| 2747 | { |
| 2748 | if (cookie->rels |
| 2749 | /* PR 20401. The relocs may not have been cached, so check first. |
| 2750 | If the relocs were loaded by init_reloc_cookie_rels() then this |
| 2751 | will be the case. FIXME: Would performance be improved if the |
| 2752 | relocs *were* cached ? */ |
| 2753 | && coff_section_data (NULL, sec) |
| 2754 | && coff_section_data (NULL, sec)->relocs != cookie->rels) |
| 2755 | free (cookie->rels); |
| 2756 | } |
| 2757 | |
| 2758 | /* Initialize the whole of COOKIE for input section SEC. */ |
| 2759 | |
| 2760 | static bfd_boolean |
| 2761 | init_reloc_cookie_for_section (struct coff_reloc_cookie *cookie, |
| 2762 | struct bfd_link_info *info, |
| 2763 | asection *sec) |
| 2764 | { |
| 2765 | if (!init_reloc_cookie (cookie, info, sec->owner)) |
| 2766 | return FALSE; |
| 2767 | |
| 2768 | if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec)) |
| 2769 | { |
| 2770 | fini_reloc_cookie (cookie, sec->owner); |
| 2771 | return FALSE; |
| 2772 | } |
| 2773 | return TRUE; |
| 2774 | } |
| 2775 | |
| 2776 | /* Free the memory allocated by init_reloc_cookie_for_section, |
| 2777 | if appropriate. */ |
| 2778 | |
| 2779 | static void |
| 2780 | fini_reloc_cookie_for_section (struct coff_reloc_cookie *cookie, |
| 2781 | asection *sec) |
| 2782 | { |
| 2783 | fini_reloc_cookie_rels (cookie, sec); |
| 2784 | fini_reloc_cookie (cookie, sec->owner); |
| 2785 | } |
| 2786 | |
| 2787 | static asection * |
| 2788 | _bfd_coff_gc_mark_hook (asection *sec, |
| 2789 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 2790 | struct internal_reloc *rel ATTRIBUTE_UNUSED, |
| 2791 | struct coff_link_hash_entry *h, |
| 2792 | struct internal_syment *sym) |
| 2793 | { |
| 2794 | if (h != NULL) |
| 2795 | { |
| 2796 | switch (h->root.type) |
| 2797 | { |
| 2798 | case bfd_link_hash_defined: |
| 2799 | case bfd_link_hash_defweak: |
| 2800 | return h->root.u.def.section; |
| 2801 | |
| 2802 | case bfd_link_hash_common: |
| 2803 | return h->root.u.c.p->section; |
| 2804 | |
| 2805 | case bfd_link_hash_undefweak: |
| 2806 | if (h->symbol_class == C_NT_WEAK && h->numaux == 1) |
| 2807 | { |
| 2808 | /* PE weak externals. A weak symbol may include an auxiliary |
| 2809 | record indicating that if the weak symbol is not resolved, |
| 2810 | another external symbol is used instead. */ |
| 2811 | struct coff_link_hash_entry *h2 = |
| 2812 | h->auxbfd->tdata.coff_obj_data->sym_hashes[ |
| 2813 | h->aux->x_sym.x_tagndx.l]; |
| 2814 | |
| 2815 | if (h2 && h2->root.type != bfd_link_hash_undefined) |
| 2816 | return h2->root.u.def.section; |
| 2817 | } |
| 2818 | break; |
| 2819 | |
| 2820 | case bfd_link_hash_undefined: |
| 2821 | default: |
| 2822 | break; |
| 2823 | } |
| 2824 | return NULL; |
| 2825 | } |
| 2826 | |
| 2827 | return coff_section_from_bfd_index (sec->owner, sym->n_scnum); |
| 2828 | } |
| 2829 | |
| 2830 | /* COOKIE->rel describes a relocation against section SEC, which is |
| 2831 | a section we've decided to keep. Return the section that contains |
| 2832 | the relocation symbol, or NULL if no section contains it. */ |
| 2833 | |
| 2834 | static asection * |
| 2835 | _bfd_coff_gc_mark_rsec (struct bfd_link_info *info, asection *sec, |
| 2836 | coff_gc_mark_hook_fn gc_mark_hook, |
| 2837 | struct coff_reloc_cookie *cookie) |
| 2838 | { |
| 2839 | struct coff_link_hash_entry *h; |
| 2840 | |
| 2841 | h = cookie->sym_hashes[cookie->rel->r_symndx]; |
| 2842 | if (h != NULL) |
| 2843 | { |
| 2844 | while (h->root.type == bfd_link_hash_indirect |
| 2845 | || h->root.type == bfd_link_hash_warning) |
| 2846 | h = (struct coff_link_hash_entry *) h->root.u.i.link; |
| 2847 | |
| 2848 | return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL); |
| 2849 | } |
| 2850 | |
| 2851 | return (*gc_mark_hook) (sec, info, cookie->rel, NULL, |
| 2852 | &(cookie->symbols |
| 2853 | + obj_convert (sec->owner)[cookie->rel->r_symndx])->native->u.syment); |
| 2854 | } |
| 2855 | |
| 2856 | static bfd_boolean _bfd_coff_gc_mark |
| 2857 | (struct bfd_link_info *, asection *, coff_gc_mark_hook_fn); |
| 2858 | |
| 2859 | /* COOKIE->rel describes a relocation against section SEC, which is |
| 2860 | a section we've decided to keep. Mark the section that contains |
| 2861 | the relocation symbol. */ |
| 2862 | |
| 2863 | static bfd_boolean |
| 2864 | _bfd_coff_gc_mark_reloc (struct bfd_link_info *info, |
| 2865 | asection *sec, |
| 2866 | coff_gc_mark_hook_fn gc_mark_hook, |
| 2867 | struct coff_reloc_cookie *cookie) |
| 2868 | { |
| 2869 | asection *rsec; |
| 2870 | |
| 2871 | rsec = _bfd_coff_gc_mark_rsec (info, sec, gc_mark_hook, cookie); |
| 2872 | if (rsec && !rsec->gc_mark) |
| 2873 | { |
| 2874 | if (bfd_get_flavour (rsec->owner) != bfd_target_coff_flavour) |
| 2875 | rsec->gc_mark = 1; |
| 2876 | else if (!_bfd_coff_gc_mark (info, rsec, gc_mark_hook)) |
| 2877 | return FALSE; |
| 2878 | } |
| 2879 | return TRUE; |
| 2880 | } |
| 2881 | |
| 2882 | /* The mark phase of garbage collection. For a given section, mark |
| 2883 | it and any sections in this section's group, and all the sections |
| 2884 | which define symbols to which it refers. */ |
| 2885 | |
| 2886 | static bfd_boolean |
| 2887 | _bfd_coff_gc_mark (struct bfd_link_info *info, |
| 2888 | asection *sec, |
| 2889 | coff_gc_mark_hook_fn gc_mark_hook) |
| 2890 | { |
| 2891 | bfd_boolean ret = TRUE; |
| 2892 | |
| 2893 | sec->gc_mark = 1; |
| 2894 | |
| 2895 | /* Look through the section relocs. */ |
| 2896 | if ((sec->flags & SEC_RELOC) != 0 |
| 2897 | && sec->reloc_count > 0) |
| 2898 | { |
| 2899 | struct coff_reloc_cookie cookie; |
| 2900 | |
| 2901 | if (!init_reloc_cookie_for_section (&cookie, info, sec)) |
| 2902 | ret = FALSE; |
| 2903 | else |
| 2904 | { |
| 2905 | for (; cookie.rel < cookie.relend; cookie.rel++) |
| 2906 | { |
| 2907 | if (!_bfd_coff_gc_mark_reloc (info, sec, gc_mark_hook, &cookie)) |
| 2908 | { |
| 2909 | ret = FALSE; |
| 2910 | break; |
| 2911 | } |
| 2912 | } |
| 2913 | fini_reloc_cookie_for_section (&cookie, sec); |
| 2914 | } |
| 2915 | } |
| 2916 | |
| 2917 | return ret; |
| 2918 | } |
| 2919 | |
| 2920 | static bfd_boolean |
| 2921 | _bfd_coff_gc_mark_extra_sections (struct bfd_link_info *info, |
| 2922 | coff_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED) |
| 2923 | { |
| 2924 | bfd *ibfd; |
| 2925 | |
| 2926 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 2927 | { |
| 2928 | asection *isec; |
| 2929 | bfd_boolean some_kept; |
| 2930 | |
| 2931 | if (bfd_get_flavour (ibfd) != bfd_target_coff_flavour) |
| 2932 | continue; |
| 2933 | |
| 2934 | /* Ensure all linker created sections are kept, and see whether |
| 2935 | any other section is already marked. */ |
| 2936 | some_kept = FALSE; |
| 2937 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
| 2938 | { |
| 2939 | if ((isec->flags & SEC_LINKER_CREATED) != 0) |
| 2940 | isec->gc_mark = 1; |
| 2941 | else if (isec->gc_mark) |
| 2942 | some_kept = TRUE; |
| 2943 | } |
| 2944 | |
| 2945 | /* If no section in this file will be kept, then we can |
| 2946 | toss out debug sections. */ |
| 2947 | if (!some_kept) |
| 2948 | continue; |
| 2949 | |
| 2950 | /* Keep debug and special sections like .comment when they are |
| 2951 | not part of a group, or when we have single-member groups. */ |
| 2952 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
| 2953 | if ((isec->flags & SEC_DEBUGGING) != 0 |
| 2954 | || (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0) |
| 2955 | isec->gc_mark = 1; |
| 2956 | } |
| 2957 | return TRUE; |
| 2958 | } |
| 2959 | |
| 2960 | /* Sweep symbols in swept sections. Called via coff_link_hash_traverse. */ |
| 2961 | |
| 2962 | static bfd_boolean |
| 2963 | coff_gc_sweep_symbol (struct coff_link_hash_entry *h, |
| 2964 | void *data ATTRIBUTE_UNUSED) |
| 2965 | { |
| 2966 | if (h->root.type == bfd_link_hash_warning) |
| 2967 | h = (struct coff_link_hash_entry *) h->root.u.i.link; |
| 2968 | |
| 2969 | if ((h->root.type == bfd_link_hash_defined |
| 2970 | || h->root.type == bfd_link_hash_defweak) |
| 2971 | && !h->root.u.def.section->gc_mark |
| 2972 | && !(h->root.u.def.section->owner->flags & DYNAMIC)) |
| 2973 | { |
| 2974 | /* Do our best to hide the symbol. */ |
| 2975 | h->root.u.def.section = bfd_und_section_ptr; |
| 2976 | h->symbol_class = C_HIDDEN; |
| 2977 | } |
| 2978 | |
| 2979 | return TRUE; |
| 2980 | } |
| 2981 | |
| 2982 | /* The sweep phase of garbage collection. Remove all garbage sections. */ |
| 2983 | |
| 2984 | typedef bfd_boolean (*gc_sweep_hook_fn) |
| 2985 | (bfd *, struct bfd_link_info *, asection *, const struct internal_reloc *); |
| 2986 | |
| 2987 | static bfd_boolean |
| 2988 | coff_gc_sweep (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) |
| 2989 | { |
| 2990 | bfd *sub; |
| 2991 | |
| 2992 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
| 2993 | { |
| 2994 | asection *o; |
| 2995 | |
| 2996 | if (bfd_get_flavour (sub) != bfd_target_coff_flavour) |
| 2997 | continue; |
| 2998 | |
| 2999 | for (o = sub->sections; o != NULL; o = o->next) |
| 3000 | { |
| 3001 | /* Keep debug and special sections. */ |
| 3002 | if ((o->flags & (SEC_DEBUGGING | SEC_LINKER_CREATED)) != 0 |
| 3003 | || (o->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0) |
| 3004 | o->gc_mark = 1; |
| 3005 | else if (CONST_STRNEQ (o->name, ".idata") |
| 3006 | || CONST_STRNEQ (o->name, ".pdata") |
| 3007 | || CONST_STRNEQ (o->name, ".xdata") |
| 3008 | || CONST_STRNEQ (o->name, ".rsrc")) |
| 3009 | o->gc_mark = 1; |
| 3010 | |
| 3011 | if (o->gc_mark) |
| 3012 | continue; |
| 3013 | |
| 3014 | /* Skip sweeping sections already excluded. */ |
| 3015 | if (o->flags & SEC_EXCLUDE) |
| 3016 | continue; |
| 3017 | |
| 3018 | /* Since this is early in the link process, it is simple |
| 3019 | to remove a section from the output. */ |
| 3020 | o->flags |= SEC_EXCLUDE; |
| 3021 | |
| 3022 | if (info->print_gc_sections && o->size != 0) |
| 3023 | /* xgettext: c-format */ |
| 3024 | _bfd_error_handler (_("Removing unused section '%A' in file '%B'"), |
| 3025 | o, sub); |
| 3026 | |
| 3027 | #if 0 |
| 3028 | /* But we also have to update some of the relocation |
| 3029 | info we collected before. */ |
| 3030 | if (gc_sweep_hook |
| 3031 | && (o->flags & SEC_RELOC) != 0 |
| 3032 | && o->reloc_count > 0 |
| 3033 | && !bfd_is_abs_section (o->output_section)) |
| 3034 | { |
| 3035 | struct internal_reloc *internal_relocs; |
| 3036 | bfd_boolean r; |
| 3037 | |
| 3038 | internal_relocs |
| 3039 | = _bfd_coff_link_read_relocs (o->owner, o, NULL, NULL, |
| 3040 | info->keep_memory); |
| 3041 | if (internal_relocs == NULL) |
| 3042 | return FALSE; |
| 3043 | |
| 3044 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); |
| 3045 | |
| 3046 | if (coff_section_data (o)->relocs != internal_relocs) |
| 3047 | free (internal_relocs); |
| 3048 | |
| 3049 | if (!r) |
| 3050 | return FALSE; |
| 3051 | } |
| 3052 | #endif |
| 3053 | } |
| 3054 | } |
| 3055 | |
| 3056 | /* Remove the symbols that were in the swept sections from the dynamic |
| 3057 | symbol table. */ |
| 3058 | coff_link_hash_traverse (coff_hash_table (info), coff_gc_sweep_symbol, |
| 3059 | NULL); |
| 3060 | |
| 3061 | return TRUE; |
| 3062 | } |
| 3063 | |
| 3064 | /* Keep all sections containing symbols undefined on the command-line, |
| 3065 | and the section containing the entry symbol. */ |
| 3066 | |
| 3067 | static void |
| 3068 | _bfd_coff_gc_keep (struct bfd_link_info *info) |
| 3069 | { |
| 3070 | struct bfd_sym_chain *sym; |
| 3071 | |
| 3072 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) |
| 3073 | { |
| 3074 | struct coff_link_hash_entry *h; |
| 3075 | |
| 3076 | h = coff_link_hash_lookup (coff_hash_table (info), sym->name, |
| 3077 | FALSE, FALSE, FALSE); |
| 3078 | |
| 3079 | if (h != NULL |
| 3080 | && (h->root.type == bfd_link_hash_defined |
| 3081 | || h->root.type == bfd_link_hash_defweak) |
| 3082 | && !bfd_is_abs_section (h->root.u.def.section)) |
| 3083 | h->root.u.def.section->flags |= SEC_KEEP; |
| 3084 | } |
| 3085 | } |
| 3086 | |
| 3087 | /* Do mark and sweep of unused sections. */ |
| 3088 | |
| 3089 | bfd_boolean |
| 3090 | bfd_coff_gc_sections (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) |
| 3091 | { |
| 3092 | bfd *sub; |
| 3093 | |
| 3094 | /* FIXME: Should we implement this? */ |
| 3095 | #if 0 |
| 3096 | const bfd_coff_backend_data *bed = coff_backend_info (abfd); |
| 3097 | |
| 3098 | if (!bed->can_gc_sections |
| 3099 | || !is_coff_hash_table (info->hash)) |
| 3100 | { |
| 3101 | _bfd_error_handler(_("Warning: gc-sections option ignored")); |
| 3102 | return TRUE; |
| 3103 | } |
| 3104 | #endif |
| 3105 | |
| 3106 | _bfd_coff_gc_keep (info); |
| 3107 | |
| 3108 | /* Grovel through relocs to find out who stays ... */ |
| 3109 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
| 3110 | { |
| 3111 | asection *o; |
| 3112 | |
| 3113 | if (bfd_get_flavour (sub) != bfd_target_coff_flavour) |
| 3114 | continue; |
| 3115 | |
| 3116 | for (o = sub->sections; o != NULL; o = o->next) |
| 3117 | { |
| 3118 | if (((o->flags & (SEC_EXCLUDE | SEC_KEEP)) == SEC_KEEP |
| 3119 | || CONST_STRNEQ (o->name, ".vectors") |
| 3120 | || CONST_STRNEQ (o->name, ".ctors") |
| 3121 | || CONST_STRNEQ (o->name, ".dtors")) |
| 3122 | && !o->gc_mark) |
| 3123 | { |
| 3124 | if (!_bfd_coff_gc_mark (info, o, _bfd_coff_gc_mark_hook)) |
| 3125 | return FALSE; |
| 3126 | } |
| 3127 | } |
| 3128 | } |
| 3129 | |
| 3130 | /* Allow the backend to mark additional target specific sections. */ |
| 3131 | _bfd_coff_gc_mark_extra_sections (info, _bfd_coff_gc_mark_hook); |
| 3132 | |
| 3133 | /* ... and mark SEC_EXCLUDE for those that go. */ |
| 3134 | return coff_gc_sweep (abfd, info); |
| 3135 | } |