| 1 | /* ELF attributes support (based on ARM EABI attributes). |
| 2 | Copyright 2005, 2006, 2007 |
| 3 | Free Software Foundation, Inc. |
| 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 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "libiberty.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "elf-bfd.h" |
| 27 | |
| 28 | /* Return the number of bytes needed by I in uleb128 format. */ |
| 29 | static int |
| 30 | uleb128_size (unsigned int i) |
| 31 | { |
| 32 | int size; |
| 33 | size = 1; |
| 34 | while (i >= 0x80) |
| 35 | { |
| 36 | i >>= 7; |
| 37 | size++; |
| 38 | } |
| 39 | return size; |
| 40 | } |
| 41 | |
| 42 | /* Return TRUE if the attribute has the default value (0/""). */ |
| 43 | static bfd_boolean |
| 44 | is_default_attr (obj_attribute *attr) |
| 45 | { |
| 46 | if ((attr->type & 1) && attr->i != 0) |
| 47 | return FALSE; |
| 48 | if ((attr->type & 2) && attr->s && *attr->s) |
| 49 | return FALSE; |
| 50 | |
| 51 | return TRUE; |
| 52 | } |
| 53 | |
| 54 | /* Return the size of a single attribute. */ |
| 55 | static bfd_vma |
| 56 | obj_attr_size (int tag, obj_attribute *attr) |
| 57 | { |
| 58 | bfd_vma size; |
| 59 | |
| 60 | if (is_default_attr (attr)) |
| 61 | return 0; |
| 62 | |
| 63 | size = uleb128_size (tag); |
| 64 | if (attr->type & 1) |
| 65 | size += uleb128_size (attr->i); |
| 66 | if (attr->type & 2) |
| 67 | size += strlen ((char *)attr->s) + 1; |
| 68 | return size; |
| 69 | } |
| 70 | |
| 71 | /* Return the vendor name for a given object attributes section. */ |
| 72 | static const char * |
| 73 | vendor_obj_attr_name (bfd *abfd, int vendor) |
| 74 | { |
| 75 | return (vendor == OBJ_ATTR_PROC |
| 76 | ? get_elf_backend_data (abfd)->obj_attrs_vendor |
| 77 | : "gnu"); |
| 78 | } |
| 79 | |
| 80 | /* Return the size of the object attributes section for VENDOR |
| 81 | (OBJ_ATTR_PROC or OBJ_ATTR_GNU), or 0 if there are no attributes |
| 82 | for that vendor to record and the vendor is OBJ_ATTR_GNU. */ |
| 83 | static bfd_vma |
| 84 | vendor_obj_attr_size (bfd *abfd, int vendor) |
| 85 | { |
| 86 | bfd_vma size; |
| 87 | obj_attribute *attr; |
| 88 | obj_attribute_list *list; |
| 89 | int i; |
| 90 | const char *vendor_name = vendor_obj_attr_name (abfd, vendor); |
| 91 | |
| 92 | if (!vendor_name) |
| 93 | return 0; |
| 94 | |
| 95 | attr = elf_known_obj_attributes (abfd)[vendor]; |
| 96 | size = 0; |
| 97 | for (i = 4; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++) |
| 98 | size += obj_attr_size (i, &attr[i]); |
| 99 | |
| 100 | for (list = elf_other_obj_attributes (abfd)[vendor]; |
| 101 | list; |
| 102 | list = list->next) |
| 103 | size += obj_attr_size (list->tag, &list->attr); |
| 104 | |
| 105 | /* <size> <vendor_name> NUL 0x1 <size> */ |
| 106 | return ((size || vendor == OBJ_ATTR_PROC) |
| 107 | ? size + 10 + strlen (vendor_name) |
| 108 | : 0); |
| 109 | } |
| 110 | |
| 111 | /* Return the size of the object attributes section. */ |
| 112 | bfd_vma |
| 113 | bfd_elf_obj_attr_size (bfd *abfd) |
| 114 | { |
| 115 | bfd_vma size; |
| 116 | |
| 117 | size = vendor_obj_attr_size (abfd, OBJ_ATTR_PROC); |
| 118 | size += vendor_obj_attr_size (abfd, OBJ_ATTR_GNU); |
| 119 | |
| 120 | /* 'A' <sections for each vendor> */ |
| 121 | return (size ? size + 1 : 0); |
| 122 | } |
| 123 | |
| 124 | /* Write VAL in uleb128 format to P, returning a pointer to the |
| 125 | following byte. */ |
| 126 | static bfd_byte * |
| 127 | write_uleb128 (bfd_byte *p, unsigned int val) |
| 128 | { |
| 129 | bfd_byte c; |
| 130 | do |
| 131 | { |
| 132 | c = val & 0x7f; |
| 133 | val >>= 7; |
| 134 | if (val) |
| 135 | c |= 0x80; |
| 136 | *(p++) = c; |
| 137 | } |
| 138 | while (val); |
| 139 | return p; |
| 140 | } |
| 141 | |
| 142 | /* Write attribute ATTR to butter P, and return a pointer to the following |
| 143 | byte. */ |
| 144 | static bfd_byte * |
| 145 | write_obj_attribute (bfd_byte *p, int tag, obj_attribute *attr) |
| 146 | { |
| 147 | /* Suppress default entries. */ |
| 148 | if (is_default_attr (attr)) |
| 149 | return p; |
| 150 | |
| 151 | p = write_uleb128 (p, tag); |
| 152 | if (attr->type & 1) |
| 153 | p = write_uleb128 (p, attr->i); |
| 154 | if (attr->type & 2) |
| 155 | { |
| 156 | int len; |
| 157 | |
| 158 | len = strlen (attr->s) + 1; |
| 159 | memcpy (p, attr->s, len); |
| 160 | p += len; |
| 161 | } |
| 162 | |
| 163 | return p; |
| 164 | } |
| 165 | |
| 166 | /* Write the contents of the object attributes section (length SIZE) |
| 167 | for VENDOR to CONTENTS. */ |
| 168 | static void |
| 169 | vendor_set_obj_attr_contents (bfd *abfd, bfd_byte *contents, bfd_vma size, |
| 170 | int vendor) |
| 171 | { |
| 172 | bfd_byte *p; |
| 173 | obj_attribute *attr; |
| 174 | obj_attribute_list *list; |
| 175 | int i; |
| 176 | const char *vendor_name = vendor_obj_attr_name (abfd, vendor); |
| 177 | size_t vendor_length = strlen (vendor_name) + 1; |
| 178 | |
| 179 | p = contents; |
| 180 | bfd_put_32 (abfd, size, p); |
| 181 | p += 4; |
| 182 | memcpy (p, vendor_name, vendor_length); |
| 183 | p += vendor_length; |
| 184 | *(p++) = Tag_File; |
| 185 | bfd_put_32 (abfd, size - 4 - vendor_length, p); |
| 186 | p += 4; |
| 187 | |
| 188 | attr = elf_known_obj_attributes (abfd)[vendor]; |
| 189 | for (i = 4; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++) |
| 190 | p = write_obj_attribute (p, i, &attr[i]); |
| 191 | |
| 192 | for (list = elf_other_obj_attributes (abfd)[vendor]; |
| 193 | list; |
| 194 | list = list->next) |
| 195 | p = write_obj_attribute (p, list->tag, &list->attr); |
| 196 | } |
| 197 | |
| 198 | /* Write the contents of the object attributes section to CONTENTS. */ |
| 199 | void |
| 200 | bfd_elf_set_obj_attr_contents (bfd *abfd, bfd_byte *contents, bfd_vma size) |
| 201 | { |
| 202 | bfd_byte *p; |
| 203 | int vendor; |
| 204 | bfd_vma my_size; |
| 205 | |
| 206 | p = contents; |
| 207 | *(p++) = 'A'; |
| 208 | my_size = 1; |
| 209 | for (vendor = OBJ_ATTR_FIRST; vendor <= OBJ_ATTR_LAST; vendor++) |
| 210 | { |
| 211 | bfd_vma vendor_size = vendor_obj_attr_size (abfd, vendor); |
| 212 | if (vendor_size) |
| 213 | vendor_set_obj_attr_contents (abfd, p, vendor_size, vendor); |
| 214 | p += vendor_size; |
| 215 | my_size += vendor_size; |
| 216 | } |
| 217 | |
| 218 | if (size != my_size) |
| 219 | abort (); |
| 220 | } |
| 221 | |
| 222 | /* Allocate/find an object attribute. */ |
| 223 | static obj_attribute * |
| 224 | elf_new_obj_attr (bfd *abfd, int vendor, int tag) |
| 225 | { |
| 226 | obj_attribute *attr; |
| 227 | obj_attribute_list *list; |
| 228 | obj_attribute_list *p; |
| 229 | obj_attribute_list **lastp; |
| 230 | |
| 231 | |
| 232 | if (tag < NUM_KNOWN_OBJ_ATTRIBUTES) |
| 233 | { |
| 234 | /* Knwon tags are preallocated. */ |
| 235 | attr = &elf_known_obj_attributes (abfd)[vendor][tag]; |
| 236 | } |
| 237 | else |
| 238 | { |
| 239 | /* Create a new tag. */ |
| 240 | list = (obj_attribute_list *) |
| 241 | bfd_alloc (abfd, sizeof (obj_attribute_list)); |
| 242 | memset (list, 0, sizeof (obj_attribute_list)); |
| 243 | list->tag = tag; |
| 244 | /* Keep the tag list in order. */ |
| 245 | lastp = &elf_other_obj_attributes (abfd)[vendor]; |
| 246 | for (p = *lastp; p; p = p->next) |
| 247 | { |
| 248 | if (tag < p->tag) |
| 249 | break; |
| 250 | lastp = &p->next; |
| 251 | } |
| 252 | list->next = *lastp; |
| 253 | *lastp = list; |
| 254 | attr = &list->attr; |
| 255 | } |
| 256 | |
| 257 | return attr; |
| 258 | } |
| 259 | |
| 260 | /* Return the value of an integer object attribute. */ |
| 261 | int |
| 262 | bfd_elf_get_obj_attr_int (bfd *abfd, int vendor, int tag) |
| 263 | { |
| 264 | obj_attribute_list *p; |
| 265 | |
| 266 | if (tag < NUM_KNOWN_OBJ_ATTRIBUTES) |
| 267 | { |
| 268 | /* Knwon tags are preallocated. */ |
| 269 | return elf_known_obj_attributes (abfd)[vendor][tag].i; |
| 270 | } |
| 271 | else |
| 272 | { |
| 273 | for (p = elf_other_obj_attributes (abfd)[vendor]; |
| 274 | p; |
| 275 | p = p->next) |
| 276 | { |
| 277 | if (tag == p->tag) |
| 278 | return p->attr.i; |
| 279 | if (tag < p->tag) |
| 280 | break; |
| 281 | } |
| 282 | return 0; |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | /* Add an integer object attribute. */ |
| 287 | void |
| 288 | bfd_elf_add_obj_attr_int (bfd *abfd, int vendor, int tag, unsigned int i) |
| 289 | { |
| 290 | obj_attribute *attr; |
| 291 | |
| 292 | attr = elf_new_obj_attr (abfd, vendor, tag); |
| 293 | attr->type = 1; |
| 294 | attr->i = i; |
| 295 | } |
| 296 | |
| 297 | /* Duplicate an object attribute string value. */ |
| 298 | char * |
| 299 | _bfd_elf_attr_strdup (bfd *abfd, const char * s) |
| 300 | { |
| 301 | char * p; |
| 302 | int len; |
| 303 | |
| 304 | len = strlen (s) + 1; |
| 305 | p = (char *) bfd_alloc (abfd, len); |
| 306 | return memcpy (p, s, len); |
| 307 | } |
| 308 | |
| 309 | /* Add a string object attribute. */ |
| 310 | void |
| 311 | bfd_elf_add_obj_attr_string (bfd *abfd, int vendor, int tag, const char *s) |
| 312 | { |
| 313 | obj_attribute *attr; |
| 314 | |
| 315 | attr = elf_new_obj_attr (abfd, vendor, tag); |
| 316 | attr->type = 2; |
| 317 | attr->s = _bfd_elf_attr_strdup (abfd, s); |
| 318 | } |
| 319 | |
| 320 | /* Add a Tag_compatibility object attribute. */ |
| 321 | void |
| 322 | bfd_elf_add_obj_attr_compat (bfd *abfd, int vendor, unsigned int i, |
| 323 | const char *s) |
| 324 | { |
| 325 | obj_attribute_list *list; |
| 326 | obj_attribute_list *p; |
| 327 | obj_attribute_list **lastp; |
| 328 | |
| 329 | list = (obj_attribute_list *) |
| 330 | bfd_alloc (abfd, sizeof (obj_attribute_list)); |
| 331 | memset (list, 0, sizeof (obj_attribute_list)); |
| 332 | list->tag = Tag_compatibility; |
| 333 | list->attr.type = 3; |
| 334 | list->attr.i = i; |
| 335 | list->attr.s = _bfd_elf_attr_strdup (abfd, s); |
| 336 | |
| 337 | lastp = &elf_other_obj_attributes (abfd)[vendor]; |
| 338 | for (p = *lastp; p; p = p->next) |
| 339 | { |
| 340 | int cmp; |
| 341 | if (p->tag != Tag_compatibility) |
| 342 | break; |
| 343 | cmp = strcmp(s, p->attr.s); |
| 344 | if (cmp < 0 || (cmp == 0 && i < p->attr.i)) |
| 345 | break; |
| 346 | lastp = &p->next; |
| 347 | } |
| 348 | list->next = *lastp; |
| 349 | *lastp = list; |
| 350 | } |
| 351 | |
| 352 | /* Copy the object attributes from IBFD to OBFD. */ |
| 353 | void |
| 354 | _bfd_elf_copy_obj_attributes (bfd *ibfd, bfd *obfd) |
| 355 | { |
| 356 | obj_attribute *in_attr; |
| 357 | obj_attribute *out_attr; |
| 358 | obj_attribute_list *list; |
| 359 | int i; |
| 360 | int vendor; |
| 361 | |
| 362 | for (vendor = OBJ_ATTR_FIRST; vendor <= OBJ_ATTR_LAST; vendor++) |
| 363 | { |
| 364 | in_attr = &elf_known_obj_attributes (ibfd)[vendor][4]; |
| 365 | out_attr = &elf_known_obj_attributes (obfd)[vendor][4]; |
| 366 | for (i = 4; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++) |
| 367 | { |
| 368 | out_attr->type = in_attr->type; |
| 369 | out_attr->i = in_attr->i; |
| 370 | if (in_attr->s && *in_attr->s) |
| 371 | out_attr->s = _bfd_elf_attr_strdup (obfd, in_attr->s); |
| 372 | in_attr++; |
| 373 | out_attr++; |
| 374 | } |
| 375 | |
| 376 | for (list = elf_other_obj_attributes (ibfd)[vendor]; |
| 377 | list; |
| 378 | list = list->next) |
| 379 | { |
| 380 | in_attr = &list->attr; |
| 381 | switch (in_attr->type) |
| 382 | { |
| 383 | case 1: |
| 384 | bfd_elf_add_obj_attr_int (obfd, vendor, list->tag, in_attr->i); |
| 385 | break; |
| 386 | case 2: |
| 387 | bfd_elf_add_obj_attr_string (obfd, vendor, list->tag, |
| 388 | in_attr->s); |
| 389 | break; |
| 390 | case 3: |
| 391 | bfd_elf_add_obj_attr_compat (obfd, vendor, in_attr->i, |
| 392 | in_attr->s); |
| 393 | break; |
| 394 | default: |
| 395 | abort (); |
| 396 | } |
| 397 | } |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | /* Determine whether a GNU object attribute tag takes an integer, a |
| 402 | string or both. */ |
| 403 | static int |
| 404 | gnu_obj_attrs_arg_type (int tag) |
| 405 | { |
| 406 | /* Except for Tag_compatibility, for GNU attributes we follow the |
| 407 | same rule ARM ones > 32 follow: odd-numbered tags take strings |
| 408 | and even-numbered tags take integers. In addition, tag & 2 is |
| 409 | nonzero for architecture-independent tags and zero for |
| 410 | architecture-dependent ones. */ |
| 411 | if (tag == Tag_compatibility) |
| 412 | return 3; |
| 413 | else |
| 414 | return (tag & 1) != 0 ? 2 : 1; |
| 415 | } |
| 416 | |
| 417 | /* Determine what arguments an attribute tag takes. */ |
| 418 | int |
| 419 | _bfd_elf_obj_attrs_arg_type (bfd *abfd, int vendor, int tag) |
| 420 | { |
| 421 | switch (vendor) |
| 422 | { |
| 423 | case OBJ_ATTR_PROC: |
| 424 | return get_elf_backend_data (abfd)->obj_attrs_arg_type (tag); |
| 425 | break; |
| 426 | case OBJ_ATTR_GNU: |
| 427 | return gnu_obj_attrs_arg_type (tag); |
| 428 | break; |
| 429 | default: |
| 430 | abort (); |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | /* Parse an object attributes section. */ |
| 435 | void |
| 436 | _bfd_elf_parse_attributes (bfd *abfd, Elf_Internal_Shdr * hdr) |
| 437 | { |
| 438 | bfd_byte *contents; |
| 439 | bfd_byte *p; |
| 440 | bfd_vma len; |
| 441 | const char *std_section; |
| 442 | |
| 443 | contents = bfd_malloc (hdr->sh_size); |
| 444 | if (!contents) |
| 445 | return; |
| 446 | if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0, |
| 447 | hdr->sh_size)) |
| 448 | { |
| 449 | free (contents); |
| 450 | return; |
| 451 | } |
| 452 | p = contents; |
| 453 | std_section = get_elf_backend_data (abfd)->obj_attrs_vendor; |
| 454 | if (*(p++) == 'A') |
| 455 | { |
| 456 | len = hdr->sh_size - 1; |
| 457 | while (len > 0) |
| 458 | { |
| 459 | int namelen; |
| 460 | bfd_vma section_len; |
| 461 | int vendor; |
| 462 | |
| 463 | section_len = bfd_get_32 (abfd, p); |
| 464 | p += 4; |
| 465 | if (section_len > len) |
| 466 | section_len = len; |
| 467 | len -= section_len; |
| 468 | namelen = strlen ((char *)p) + 1; |
| 469 | section_len -= namelen + 4; |
| 470 | if (std_section && strcmp ((char *)p, std_section) == 0) |
| 471 | vendor = OBJ_ATTR_PROC; |
| 472 | else if (strcmp ((char *)p, "gnu") == 0) |
| 473 | vendor = OBJ_ATTR_GNU; |
| 474 | else |
| 475 | { |
| 476 | /* Other vendor section. Ignore it. */ |
| 477 | p += namelen + section_len; |
| 478 | continue; |
| 479 | } |
| 480 | |
| 481 | p += namelen; |
| 482 | while (section_len > 0) |
| 483 | { |
| 484 | int tag; |
| 485 | unsigned int n; |
| 486 | unsigned int val; |
| 487 | bfd_vma subsection_len; |
| 488 | bfd_byte *end; |
| 489 | |
| 490 | tag = read_unsigned_leb128 (abfd, p, &n); |
| 491 | p += n; |
| 492 | subsection_len = bfd_get_32 (abfd, p); |
| 493 | p += 4; |
| 494 | if (subsection_len > section_len) |
| 495 | subsection_len = section_len; |
| 496 | section_len -= subsection_len; |
| 497 | subsection_len -= n + 4; |
| 498 | end = p + subsection_len; |
| 499 | switch (tag) |
| 500 | { |
| 501 | case Tag_File: |
| 502 | while (p < end) |
| 503 | { |
| 504 | int type; |
| 505 | |
| 506 | tag = read_unsigned_leb128 (abfd, p, &n); |
| 507 | p += n; |
| 508 | type = _bfd_elf_obj_attrs_arg_type (abfd, vendor, tag); |
| 509 | switch (type) |
| 510 | { |
| 511 | case 3: |
| 512 | val = read_unsigned_leb128 (abfd, p, &n); |
| 513 | p += n; |
| 514 | bfd_elf_add_obj_attr_compat (abfd, vendor, val, |
| 515 | (char *)p); |
| 516 | p += strlen ((char *)p) + 1; |
| 517 | break; |
| 518 | case 2: |
| 519 | bfd_elf_add_obj_attr_string (abfd, vendor, tag, |
| 520 | (char *)p); |
| 521 | p += strlen ((char *)p) + 1; |
| 522 | break; |
| 523 | case 1: |
| 524 | val = read_unsigned_leb128 (abfd, p, &n); |
| 525 | p += n; |
| 526 | bfd_elf_add_obj_attr_int (abfd, vendor, tag, val); |
| 527 | break; |
| 528 | default: |
| 529 | abort (); |
| 530 | } |
| 531 | } |
| 532 | break; |
| 533 | case Tag_Section: |
| 534 | case Tag_Symbol: |
| 535 | /* Don't have anywhere convenient to attach these. |
| 536 | Fall through for now. */ |
| 537 | default: |
| 538 | /* Ignore things we don't kow about. */ |
| 539 | p += subsection_len; |
| 540 | subsection_len = 0; |
| 541 | break; |
| 542 | } |
| 543 | } |
| 544 | } |
| 545 | } |
| 546 | free (contents); |
| 547 | } |
| 548 | |
| 549 | /* Merge common object attributes from IBFD into OBFD. Raise an error |
| 550 | if there are conflicting attributes. Any processor-specific |
| 551 | attributes have already been merged. This must be called from the |
| 552 | bfd_elfNN_bfd_merge_private_bfd_data hook for each individual |
| 553 | target, along with any target-specific merging. Because there are |
| 554 | no common attributes other than Tag_compatibility at present, and |
| 555 | non-"gnu" Tag_compatibility is not expected in "gnu" sections, this |
| 556 | is not presently called for targets without their own |
| 557 | attributes. */ |
| 558 | |
| 559 | bfd_boolean |
| 560 | _bfd_elf_merge_object_attributes (bfd *ibfd, bfd *obfd) |
| 561 | { |
| 562 | obj_attribute *in_attr; |
| 563 | obj_attribute *out_attr; |
| 564 | obj_attribute_list *in_list; |
| 565 | obj_attribute_list *out_list; |
| 566 | int vendor; |
| 567 | |
| 568 | /* The only common attribute is currently Tag_compatibility, |
| 569 | accepted in both processor and "gnu" sections. */ |
| 570 | for (vendor = OBJ_ATTR_FIRST; vendor <= OBJ_ATTR_LAST; vendor++) |
| 571 | { |
| 572 | in_list = elf_other_obj_attributes (ibfd)[vendor]; |
| 573 | out_list = elf_other_obj_attributes (ibfd)[vendor]; |
| 574 | while (in_list && in_list->tag == Tag_compatibility) |
| 575 | { |
| 576 | in_attr = &in_list->attr; |
| 577 | if (in_attr->i == 0) |
| 578 | continue; |
| 579 | if (in_attr->i == 1 && strcmp (in_attr->s, "gnu") != 0) |
| 580 | { |
| 581 | _bfd_error_handler |
| 582 | (_("ERROR: %B: Must be processed by '%s' toolchain"), |
| 583 | ibfd, in_attr->s); |
| 584 | return FALSE; |
| 585 | } |
| 586 | if (!out_list || out_list->tag != Tag_compatibility |
| 587 | || strcmp (in_attr->s, out_list->attr.s) != 0) |
| 588 | { |
| 589 | /* Add this compatibility tag to the output. */ |
| 590 | bfd_elf_add_proc_attr_compat (obfd, in_attr->i, in_attr->s); |
| 591 | continue; |
| 592 | } |
| 593 | out_attr = &out_list->attr; |
| 594 | /* Check all the input tags with the same identifier. */ |
| 595 | for (;;) |
| 596 | { |
| 597 | if (out_list->tag != Tag_compatibility |
| 598 | || in_attr->i != out_attr->i |
| 599 | || strcmp (in_attr->s, out_attr->s) != 0) |
| 600 | { |
| 601 | _bfd_error_handler |
| 602 | (_("ERROR: %B: Incompatible object tag '%s':%d"), |
| 603 | ibfd, in_attr->s, in_attr->i); |
| 604 | return FALSE; |
| 605 | } |
| 606 | in_list = in_list->next; |
| 607 | if (in_list->tag != Tag_compatibility |
| 608 | || strcmp (in_attr->s, in_list->attr.s) != 0) |
| 609 | break; |
| 610 | in_attr = &in_list->attr; |
| 611 | out_list = out_list->next; |
| 612 | if (out_list) |
| 613 | out_attr = &out_list->attr; |
| 614 | } |
| 615 | |
| 616 | /* Check the output doesn't have extra tags with this identifier. */ |
| 617 | if (out_list && out_list->tag == Tag_compatibility |
| 618 | && strcmp (in_attr->s, out_list->attr.s) == 0) |
| 619 | { |
| 620 | _bfd_error_handler |
| 621 | (_("ERROR: %B: Incompatible object tag '%s':%d"), |
| 622 | ibfd, in_attr->s, out_list->attr.i); |
| 623 | return FALSE; |
| 624 | } |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | return TRUE; |
| 629 | } |