| 1 | /* Assorted BFD support routines, only used internally. |
| 2 | Copyright (C) 1990-2020 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 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "libbfd.h" |
| 25 | |
| 26 | #ifndef HAVE_GETPAGESIZE |
| 27 | #define getpagesize() 2048 |
| 28 | #endif |
| 29 | |
| 30 | /* |
| 31 | SECTION |
| 32 | Implementation details |
| 33 | |
| 34 | SUBSECTION |
| 35 | Internal functions |
| 36 | |
| 37 | DESCRIPTION |
| 38 | These routines are used within BFD. |
| 39 | They are not intended for export, but are documented here for |
| 40 | completeness. |
| 41 | */ |
| 42 | |
| 43 | bfd_boolean |
| 44 | _bfd_bool_bfd_false (bfd *abfd ATTRIBUTE_UNUSED) |
| 45 | { |
| 46 | return FALSE; |
| 47 | } |
| 48 | |
| 49 | bfd_boolean |
| 50 | _bfd_bool_bfd_asymbol_false (bfd *abfd ATTRIBUTE_UNUSED, |
| 51 | asymbol *sym ATTRIBUTE_UNUSED) |
| 52 | { |
| 53 | return FALSE; |
| 54 | } |
| 55 | |
| 56 | /* A routine which is used in target vectors for unsupported |
| 57 | operations. */ |
| 58 | |
| 59 | bfd_boolean |
| 60 | _bfd_bool_bfd_false_error (bfd *ignore ATTRIBUTE_UNUSED) |
| 61 | { |
| 62 | bfd_set_error (bfd_error_invalid_operation); |
| 63 | return FALSE; |
| 64 | } |
| 65 | |
| 66 | bfd_boolean |
| 67 | _bfd_bool_bfd_link_false_error (bfd *abfd, |
| 68 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 69 | { |
| 70 | return _bfd_bool_bfd_false_error (abfd); |
| 71 | } |
| 72 | |
| 73 | /* A routine which is used in target vectors for supported operations |
| 74 | which do not actually do anything. */ |
| 75 | |
| 76 | bfd_boolean |
| 77 | _bfd_bool_bfd_true (bfd *ignore ATTRIBUTE_UNUSED) |
| 78 | { |
| 79 | return TRUE; |
| 80 | } |
| 81 | |
| 82 | bfd_boolean |
| 83 | _bfd_bool_bfd_link_true (bfd *abfd ATTRIBUTE_UNUSED, |
| 84 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 85 | { |
| 86 | return TRUE; |
| 87 | } |
| 88 | |
| 89 | bfd_boolean |
| 90 | _bfd_bool_bfd_bfd_true (bfd *ibfd ATTRIBUTE_UNUSED, |
| 91 | bfd *obfd ATTRIBUTE_UNUSED) |
| 92 | { |
| 93 | return TRUE; |
| 94 | } |
| 95 | |
| 96 | bfd_boolean |
| 97 | _bfd_bool_bfd_uint_true (bfd *abfd ATTRIBUTE_UNUSED, |
| 98 | unsigned int flags ATTRIBUTE_UNUSED) |
| 99 | { |
| 100 | return TRUE; |
| 101 | } |
| 102 | |
| 103 | bfd_boolean |
| 104 | _bfd_bool_bfd_asection_bfd_asection_true (bfd *ibfd ATTRIBUTE_UNUSED, |
| 105 | asection *isec ATTRIBUTE_UNUSED, |
| 106 | bfd *obfd ATTRIBUTE_UNUSED, |
| 107 | asection *osec ATTRIBUTE_UNUSED) |
| 108 | { |
| 109 | return TRUE; |
| 110 | } |
| 111 | |
| 112 | bfd_boolean |
| 113 | _bfd_bool_bfd_asymbol_bfd_asymbol_true (bfd *ibfd ATTRIBUTE_UNUSED, |
| 114 | asymbol *isym ATTRIBUTE_UNUSED, |
| 115 | bfd *obfd ATTRIBUTE_UNUSED, |
| 116 | asymbol *osym ATTRIBUTE_UNUSED) |
| 117 | { |
| 118 | return TRUE; |
| 119 | } |
| 120 | |
| 121 | bfd_boolean |
| 122 | _bfd_bool_bfd_ptr_true (bfd *abfd ATTRIBUTE_UNUSED, |
| 123 | void *ptr ATTRIBUTE_UNUSED) |
| 124 | { |
| 125 | return TRUE; |
| 126 | } |
| 127 | |
| 128 | /* A routine which is used in target vectors for unsupported |
| 129 | operations which return a pointer value. */ |
| 130 | |
| 131 | void * |
| 132 | _bfd_ptr_bfd_null_error (bfd *ignore ATTRIBUTE_UNUSED) |
| 133 | { |
| 134 | bfd_set_error (bfd_error_invalid_operation); |
| 135 | return NULL; |
| 136 | } |
| 137 | |
| 138 | int |
| 139 | _bfd_int_bfd_0 (bfd *ignore ATTRIBUTE_UNUSED) |
| 140 | { |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | unsigned int |
| 145 | _bfd_uint_bfd_0 (bfd *ignore ATTRIBUTE_UNUSED) |
| 146 | { |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | long |
| 151 | _bfd_long_bfd_0 (bfd *ignore ATTRIBUTE_UNUSED) |
| 152 | { |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | /* A routine which is used in target vectors for unsupported |
| 157 | operations which return -1 on error. */ |
| 158 | |
| 159 | long |
| 160 | _bfd_long_bfd_n1_error (bfd *ignore_abfd ATTRIBUTE_UNUSED) |
| 161 | { |
| 162 | bfd_set_error (bfd_error_invalid_operation); |
| 163 | return -1; |
| 164 | } |
| 165 | |
| 166 | void |
| 167 | _bfd_void_bfd (bfd *ignore ATTRIBUTE_UNUSED) |
| 168 | { |
| 169 | } |
| 170 | |
| 171 | void |
| 172 | _bfd_void_bfd_link (bfd *abfd ATTRIBUTE_UNUSED, |
| 173 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 174 | { |
| 175 | } |
| 176 | |
| 177 | void |
| 178 | _bfd_void_bfd_asection (bfd *abfd ATTRIBUTE_UNUSED, |
| 179 | asection *sec ATTRIBUTE_UNUSED) |
| 180 | { |
| 181 | } |
| 182 | |
| 183 | long |
| 184 | _bfd_norelocs_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, |
| 185 | asection *sec ATTRIBUTE_UNUSED) |
| 186 | { |
| 187 | return sizeof (arelent *); |
| 188 | } |
| 189 | |
| 190 | long |
| 191 | _bfd_norelocs_canonicalize_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 192 | asection *sec ATTRIBUTE_UNUSED, |
| 193 | arelent **relptr, |
| 194 | asymbol **symbols ATTRIBUTE_UNUSED) |
| 195 | { |
| 196 | *relptr = NULL; |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | void |
| 201 | _bfd_norelocs_set_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 202 | asection *sec ATTRIBUTE_UNUSED, |
| 203 | arelent **relptr ATTRIBUTE_UNUSED, |
| 204 | unsigned int count ATTRIBUTE_UNUSED) |
| 205 | { |
| 206 | /* Do nothing. */ |
| 207 | } |
| 208 | |
| 209 | bfd_boolean |
| 210 | _bfd_nocore_core_file_matches_executable_p |
| 211 | (bfd *ignore_core_bfd ATTRIBUTE_UNUSED, |
| 212 | bfd *ignore_exec_bfd ATTRIBUTE_UNUSED) |
| 213 | { |
| 214 | bfd_set_error (bfd_error_invalid_operation); |
| 215 | return FALSE; |
| 216 | } |
| 217 | |
| 218 | /* Routine to handle core_file_failing_command entry point for targets |
| 219 | without core file support. */ |
| 220 | |
| 221 | char * |
| 222 | _bfd_nocore_core_file_failing_command (bfd *ignore_abfd ATTRIBUTE_UNUSED) |
| 223 | { |
| 224 | bfd_set_error (bfd_error_invalid_operation); |
| 225 | return NULL; |
| 226 | } |
| 227 | |
| 228 | /* Routine to handle core_file_failing_signal entry point for targets |
| 229 | without core file support. */ |
| 230 | |
| 231 | int |
| 232 | _bfd_nocore_core_file_failing_signal (bfd *ignore_abfd ATTRIBUTE_UNUSED) |
| 233 | { |
| 234 | bfd_set_error (bfd_error_invalid_operation); |
| 235 | return 0; |
| 236 | } |
| 237 | |
| 238 | /* Routine to handle the core_file_pid entry point for targets without |
| 239 | core file support. */ |
| 240 | |
| 241 | int |
| 242 | _bfd_nocore_core_file_pid (bfd *ignore_abfd ATTRIBUTE_UNUSED) |
| 243 | { |
| 244 | bfd_set_error (bfd_error_invalid_operation); |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | bfd_cleanup |
| 249 | _bfd_dummy_target (bfd *ignore_abfd ATTRIBUTE_UNUSED) |
| 250 | { |
| 251 | bfd_set_error (bfd_error_wrong_format); |
| 252 | return 0; |
| 253 | } |
| 254 | \f |
| 255 | /* Allocate memory using malloc. */ |
| 256 | |
| 257 | #ifndef SSIZE_MAX |
| 258 | #define SSIZE_MAX ((size_t) -1 >> 1) |
| 259 | #endif |
| 260 | |
| 261 | void * |
| 262 | bfd_malloc (bfd_size_type size) |
| 263 | { |
| 264 | void *ptr; |
| 265 | size_t sz = (size_t) size; |
| 266 | |
| 267 | if (size != sz |
| 268 | /* This is to pacify memory checkers like valgrind. */ |
| 269 | || sz > SSIZE_MAX) |
| 270 | { |
| 271 | bfd_set_error (bfd_error_no_memory); |
| 272 | return NULL; |
| 273 | } |
| 274 | |
| 275 | ptr = malloc (sz); |
| 276 | if (ptr == NULL && sz != 0) |
| 277 | bfd_set_error (bfd_error_no_memory); |
| 278 | |
| 279 | return ptr; |
| 280 | } |
| 281 | |
| 282 | void * |
| 283 | bfd_realloc (void *ptr, bfd_size_type size) |
| 284 | { |
| 285 | void *ret; |
| 286 | size_t sz = (size_t) size; |
| 287 | |
| 288 | if (ptr == NULL) |
| 289 | return bfd_malloc (size); |
| 290 | |
| 291 | if (size != sz |
| 292 | /* This is to pacify memory checkers like valgrind. */ |
| 293 | || sz > SSIZE_MAX) |
| 294 | { |
| 295 | bfd_set_error (bfd_error_no_memory); |
| 296 | return NULL; |
| 297 | } |
| 298 | |
| 299 | ret = realloc (ptr, sz); |
| 300 | |
| 301 | if (ret == NULL && sz != 0) |
| 302 | bfd_set_error (bfd_error_no_memory); |
| 303 | |
| 304 | return ret; |
| 305 | } |
| 306 | |
| 307 | /* Reallocate memory using realloc. |
| 308 | If this fails the pointer is freed before returning. */ |
| 309 | |
| 310 | void * |
| 311 | bfd_realloc_or_free (void *ptr, bfd_size_type size) |
| 312 | { |
| 313 | void *ret = bfd_realloc (ptr, size); |
| 314 | |
| 315 | if (ret == NULL && ptr != NULL) |
| 316 | free (ptr); |
| 317 | |
| 318 | return ret; |
| 319 | } |
| 320 | |
| 321 | /* Allocate memory using malloc and clear it. */ |
| 322 | |
| 323 | void * |
| 324 | bfd_zmalloc (bfd_size_type size) |
| 325 | { |
| 326 | void *ptr = bfd_malloc (size); |
| 327 | |
| 328 | if (ptr != NULL && size > 0) |
| 329 | memset (ptr, 0, (size_t) size); |
| 330 | |
| 331 | return ptr; |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | INTERNAL_FUNCTION |
| 336 | bfd_write_bigendian_4byte_int |
| 337 | |
| 338 | SYNOPSIS |
| 339 | bfd_boolean bfd_write_bigendian_4byte_int (bfd *, unsigned int); |
| 340 | |
| 341 | DESCRIPTION |
| 342 | Write a 4 byte integer @var{i} to the output BFD @var{abfd}, in big |
| 343 | endian order regardless of what else is going on. This is useful in |
| 344 | archives. |
| 345 | |
| 346 | */ |
| 347 | bfd_boolean |
| 348 | bfd_write_bigendian_4byte_int (bfd *abfd, unsigned int i) |
| 349 | { |
| 350 | bfd_byte buffer[4]; |
| 351 | bfd_putb32 ((bfd_vma) i, buffer); |
| 352 | return bfd_bwrite (buffer, (bfd_size_type) 4, abfd) == 4; |
| 353 | } |
| 354 | |
| 355 | \f |
| 356 | /** The do-it-yourself (byte) sex-change kit */ |
| 357 | |
| 358 | /* The middle letter e.g. get<b>short indicates Big or Little endian |
| 359 | target machine. It doesn't matter what the byte order of the host |
| 360 | machine is; these routines work for either. */ |
| 361 | |
| 362 | /* FIXME: Should these take a count argument? |
| 363 | Answer (gnu@cygnus.com): No, but perhaps they should be inline |
| 364 | functions in swap.h #ifdef __GNUC__. |
| 365 | Gprof them later and find out. */ |
| 366 | |
| 367 | /* |
| 368 | FUNCTION |
| 369 | bfd_put_size |
| 370 | FUNCTION |
| 371 | bfd_get_size |
| 372 | |
| 373 | DESCRIPTION |
| 374 | These macros as used for reading and writing raw data in |
| 375 | sections; each access (except for bytes) is vectored through |
| 376 | the target format of the BFD and mangled accordingly. The |
| 377 | mangling performs any necessary endian translations and |
| 378 | removes alignment restrictions. Note that types accepted and |
| 379 | returned by these macros are identical so they can be swapped |
| 380 | around in macros---for example, @file{libaout.h} defines <<GET_WORD>> |
| 381 | to either <<bfd_get_32>> or <<bfd_get_64>>. |
| 382 | |
| 383 | In the put routines, @var{val} must be a <<bfd_vma>>. If we are on a |
| 384 | system without prototypes, the caller is responsible for making |
| 385 | sure that is true, with a cast if necessary. We don't cast |
| 386 | them in the macro definitions because that would prevent <<lint>> |
| 387 | or <<gcc -Wall>> from detecting sins such as passing a pointer. |
| 388 | To detect calling these with less than a <<bfd_vma>>, use |
| 389 | <<gcc -Wconversion>> on a host with 64 bit <<bfd_vma>>'s. |
| 390 | |
| 391 | . |
| 392 | .{* Byte swapping macros for user section data. *} |
| 393 | . |
| 394 | .#define bfd_put_8(abfd, val, ptr) \ |
| 395 | . ((void) (*((unsigned char *) (ptr)) = (val) & 0xff)) |
| 396 | .#define bfd_put_signed_8 \ |
| 397 | . bfd_put_8 |
| 398 | .#define bfd_get_8(abfd, ptr) \ |
| 399 | . ((bfd_vma) *(const unsigned char *) (ptr) & 0xff) |
| 400 | .#define bfd_get_signed_8(abfd, ptr) \ |
| 401 | . ((((bfd_signed_vma) *(const unsigned char *) (ptr) & 0xff) ^ 0x80) - 0x80) |
| 402 | . |
| 403 | .#define bfd_put_16(abfd, val, ptr) \ |
| 404 | . BFD_SEND (abfd, bfd_putx16, ((val),(ptr))) |
| 405 | .#define bfd_put_signed_16 \ |
| 406 | . bfd_put_16 |
| 407 | .#define bfd_get_16(abfd, ptr) \ |
| 408 | . BFD_SEND (abfd, bfd_getx16, (ptr)) |
| 409 | .#define bfd_get_signed_16(abfd, ptr) \ |
| 410 | . BFD_SEND (abfd, bfd_getx_signed_16, (ptr)) |
| 411 | . |
| 412 | .#define bfd_put_24(abfd, val, ptr) \ |
| 413 | . do \ |
| 414 | . if (bfd_big_endian (abfd)) \ |
| 415 | . bfd_putb24 ((val), (ptr)); \ |
| 416 | . else \ |
| 417 | . bfd_putl24 ((val), (ptr)); \ |
| 418 | . while (0) |
| 419 | . |
| 420 | .bfd_vma bfd_getb24 (const void *p); |
| 421 | .bfd_vma bfd_getl24 (const void *p); |
| 422 | . |
| 423 | .#define bfd_get_24(abfd, ptr) \ |
| 424 | . (bfd_big_endian (abfd) ? bfd_getb24 (ptr) : bfd_getl24 (ptr)) |
| 425 | . |
| 426 | .#define bfd_put_32(abfd, val, ptr) \ |
| 427 | . BFD_SEND (abfd, bfd_putx32, ((val),(ptr))) |
| 428 | .#define bfd_put_signed_32 \ |
| 429 | . bfd_put_32 |
| 430 | .#define bfd_get_32(abfd, ptr) \ |
| 431 | . BFD_SEND (abfd, bfd_getx32, (ptr)) |
| 432 | .#define bfd_get_signed_32(abfd, ptr) \ |
| 433 | . BFD_SEND (abfd, bfd_getx_signed_32, (ptr)) |
| 434 | . |
| 435 | .#define bfd_put_64(abfd, val, ptr) \ |
| 436 | . BFD_SEND (abfd, bfd_putx64, ((val), (ptr))) |
| 437 | .#define bfd_put_signed_64 \ |
| 438 | . bfd_put_64 |
| 439 | .#define bfd_get_64(abfd, ptr) \ |
| 440 | . BFD_SEND (abfd, bfd_getx64, (ptr)) |
| 441 | .#define bfd_get_signed_64(abfd, ptr) \ |
| 442 | . BFD_SEND (abfd, bfd_getx_signed_64, (ptr)) |
| 443 | . |
| 444 | .#define bfd_get(bits, abfd, ptr) \ |
| 445 | . ((bits) == 8 ? bfd_get_8 (abfd, ptr) \ |
| 446 | . : (bits) == 16 ? bfd_get_16 (abfd, ptr) \ |
| 447 | . : (bits) == 32 ? bfd_get_32 (abfd, ptr) \ |
| 448 | . : (bits) == 64 ? bfd_get_64 (abfd, ptr) \ |
| 449 | . : (abort (), (bfd_vma) - 1)) |
| 450 | . |
| 451 | .#define bfd_put(bits, abfd, val, ptr) \ |
| 452 | . ((bits) == 8 ? bfd_put_8 (abfd, val, ptr) \ |
| 453 | . : (bits) == 16 ? bfd_put_16 (abfd, val, ptr) \ |
| 454 | . : (bits) == 32 ? bfd_put_32 (abfd, val, ptr) \ |
| 455 | . : (bits) == 64 ? bfd_put_64 (abfd, val, ptr) \ |
| 456 | . : (abort (), (void) 0)) |
| 457 | . |
| 458 | */ |
| 459 | |
| 460 | /* |
| 461 | FUNCTION |
| 462 | bfd_h_put_size |
| 463 | bfd_h_get_size |
| 464 | |
| 465 | DESCRIPTION |
| 466 | These macros have the same function as their <<bfd_get_x>> |
| 467 | brethren, except that they are used for removing information |
| 468 | for the header records of object files. Believe it or not, |
| 469 | some object files keep their header records in big endian |
| 470 | order and their data in little endian order. |
| 471 | . |
| 472 | .{* Byte swapping macros for file header data. *} |
| 473 | . |
| 474 | .#define bfd_h_put_8(abfd, val, ptr) \ |
| 475 | . bfd_put_8 (abfd, val, ptr) |
| 476 | .#define bfd_h_put_signed_8(abfd, val, ptr) \ |
| 477 | . bfd_put_8 (abfd, val, ptr) |
| 478 | .#define bfd_h_get_8(abfd, ptr) \ |
| 479 | . bfd_get_8 (abfd, ptr) |
| 480 | .#define bfd_h_get_signed_8(abfd, ptr) \ |
| 481 | . bfd_get_signed_8 (abfd, ptr) |
| 482 | . |
| 483 | .#define bfd_h_put_16(abfd, val, ptr) \ |
| 484 | . BFD_SEND (abfd, bfd_h_putx16, (val, ptr)) |
| 485 | .#define bfd_h_put_signed_16 \ |
| 486 | . bfd_h_put_16 |
| 487 | .#define bfd_h_get_16(abfd, ptr) \ |
| 488 | . BFD_SEND (abfd, bfd_h_getx16, (ptr)) |
| 489 | .#define bfd_h_get_signed_16(abfd, ptr) \ |
| 490 | . BFD_SEND (abfd, bfd_h_getx_signed_16, (ptr)) |
| 491 | . |
| 492 | .#define bfd_h_put_32(abfd, val, ptr) \ |
| 493 | . BFD_SEND (abfd, bfd_h_putx32, (val, ptr)) |
| 494 | .#define bfd_h_put_signed_32 \ |
| 495 | . bfd_h_put_32 |
| 496 | .#define bfd_h_get_32(abfd, ptr) \ |
| 497 | . BFD_SEND (abfd, bfd_h_getx32, (ptr)) |
| 498 | .#define bfd_h_get_signed_32(abfd, ptr) \ |
| 499 | . BFD_SEND (abfd, bfd_h_getx_signed_32, (ptr)) |
| 500 | . |
| 501 | .#define bfd_h_put_64(abfd, val, ptr) \ |
| 502 | . BFD_SEND (abfd, bfd_h_putx64, (val, ptr)) |
| 503 | .#define bfd_h_put_signed_64 \ |
| 504 | . bfd_h_put_64 |
| 505 | .#define bfd_h_get_64(abfd, ptr) \ |
| 506 | . BFD_SEND (abfd, bfd_h_getx64, (ptr)) |
| 507 | .#define bfd_h_get_signed_64(abfd, ptr) \ |
| 508 | . BFD_SEND (abfd, bfd_h_getx_signed_64, (ptr)) |
| 509 | . |
| 510 | .{* Aliases for the above, which should eventually go away. *} |
| 511 | . |
| 512 | .#define H_PUT_64 bfd_h_put_64 |
| 513 | .#define H_PUT_32 bfd_h_put_32 |
| 514 | .#define H_PUT_16 bfd_h_put_16 |
| 515 | .#define H_PUT_8 bfd_h_put_8 |
| 516 | .#define H_PUT_S64 bfd_h_put_signed_64 |
| 517 | .#define H_PUT_S32 bfd_h_put_signed_32 |
| 518 | .#define H_PUT_S16 bfd_h_put_signed_16 |
| 519 | .#define H_PUT_S8 bfd_h_put_signed_8 |
| 520 | .#define H_GET_64 bfd_h_get_64 |
| 521 | .#define H_GET_32 bfd_h_get_32 |
| 522 | .#define H_GET_16 bfd_h_get_16 |
| 523 | .#define H_GET_8 bfd_h_get_8 |
| 524 | .#define H_GET_S64 bfd_h_get_signed_64 |
| 525 | .#define H_GET_S32 bfd_h_get_signed_32 |
| 526 | .#define H_GET_S16 bfd_h_get_signed_16 |
| 527 | .#define H_GET_S8 bfd_h_get_signed_8 |
| 528 | . |
| 529 | .*/ |
| 530 | |
| 531 | /* Sign extension to bfd_signed_vma. */ |
| 532 | #define COERCE16(x) (((bfd_vma) (x) ^ 0x8000) - 0x8000) |
| 533 | #define COERCE32(x) (((bfd_vma) (x) ^ 0x80000000) - 0x80000000) |
| 534 | #define COERCE64(x) \ |
| 535 | (((bfd_uint64_t) (x) ^ ((bfd_uint64_t) 1 << 63)) - ((bfd_uint64_t) 1 << 63)) |
| 536 | |
| 537 | bfd_vma |
| 538 | bfd_getb16 (const void *p) |
| 539 | { |
| 540 | const bfd_byte *addr = (const bfd_byte *) p; |
| 541 | return (addr[0] << 8) | addr[1]; |
| 542 | } |
| 543 | |
| 544 | bfd_vma |
| 545 | bfd_getl16 (const void *p) |
| 546 | { |
| 547 | const bfd_byte *addr = (const bfd_byte *) p; |
| 548 | return (addr[1] << 8) | addr[0]; |
| 549 | } |
| 550 | |
| 551 | bfd_signed_vma |
| 552 | bfd_getb_signed_16 (const void *p) |
| 553 | { |
| 554 | const bfd_byte *addr = (const bfd_byte *) p; |
| 555 | return COERCE16 ((addr[0] << 8) | addr[1]); |
| 556 | } |
| 557 | |
| 558 | bfd_signed_vma |
| 559 | bfd_getl_signed_16 (const void *p) |
| 560 | { |
| 561 | const bfd_byte *addr = (const bfd_byte *) p; |
| 562 | return COERCE16 ((addr[1] << 8) | addr[0]); |
| 563 | } |
| 564 | |
| 565 | void |
| 566 | bfd_putb16 (bfd_vma data, void *p) |
| 567 | { |
| 568 | bfd_byte *addr = (bfd_byte *) p; |
| 569 | addr[0] = (data >> 8) & 0xff; |
| 570 | addr[1] = data & 0xff; |
| 571 | } |
| 572 | |
| 573 | void |
| 574 | bfd_putl16 (bfd_vma data, void *p) |
| 575 | { |
| 576 | bfd_byte *addr = (bfd_byte *) p; |
| 577 | addr[0] = data & 0xff; |
| 578 | addr[1] = (data >> 8) & 0xff; |
| 579 | } |
| 580 | |
| 581 | void |
| 582 | bfd_putb24 (bfd_vma data, void *p) |
| 583 | { |
| 584 | bfd_byte *addr = (bfd_byte *) p; |
| 585 | addr[0] = (data >> 16) & 0xff; |
| 586 | addr[1] = (data >> 8) & 0xff; |
| 587 | addr[2] = data & 0xff; |
| 588 | } |
| 589 | |
| 590 | void |
| 591 | bfd_putl24 (bfd_vma data, void *p) |
| 592 | { |
| 593 | bfd_byte *addr = (bfd_byte *) p; |
| 594 | addr[0] = data & 0xff; |
| 595 | addr[1] = (data >> 8) & 0xff; |
| 596 | addr[2] = (data >> 16) & 0xff; |
| 597 | } |
| 598 | |
| 599 | bfd_vma |
| 600 | bfd_getb24 (const void *p) |
| 601 | { |
| 602 | const bfd_byte *addr = (const bfd_byte *) p; |
| 603 | unsigned long v; |
| 604 | |
| 605 | v = (unsigned long) addr[0] << 16; |
| 606 | v |= (unsigned long) addr[1] << 8; |
| 607 | v |= (unsigned long) addr[2]; |
| 608 | return v; |
| 609 | } |
| 610 | |
| 611 | bfd_vma |
| 612 | bfd_getl24 (const void *p) |
| 613 | { |
| 614 | const bfd_byte *addr = (const bfd_byte *) p; |
| 615 | unsigned long v; |
| 616 | |
| 617 | v = (unsigned long) addr[0]; |
| 618 | v |= (unsigned long) addr[1] << 8; |
| 619 | v |= (unsigned long) addr[2] << 16; |
| 620 | return v; |
| 621 | } |
| 622 | |
| 623 | bfd_vma |
| 624 | bfd_getb32 (const void *p) |
| 625 | { |
| 626 | const bfd_byte *addr = (const bfd_byte *) p; |
| 627 | unsigned long v; |
| 628 | |
| 629 | v = (unsigned long) addr[0] << 24; |
| 630 | v |= (unsigned long) addr[1] << 16; |
| 631 | v |= (unsigned long) addr[2] << 8; |
| 632 | v |= (unsigned long) addr[3]; |
| 633 | return v; |
| 634 | } |
| 635 | |
| 636 | bfd_vma |
| 637 | bfd_getl32 (const void *p) |
| 638 | { |
| 639 | const bfd_byte *addr = (const bfd_byte *) p; |
| 640 | unsigned long v; |
| 641 | |
| 642 | v = (unsigned long) addr[0]; |
| 643 | v |= (unsigned long) addr[1] << 8; |
| 644 | v |= (unsigned long) addr[2] << 16; |
| 645 | v |= (unsigned long) addr[3] << 24; |
| 646 | return v; |
| 647 | } |
| 648 | |
| 649 | bfd_signed_vma |
| 650 | bfd_getb_signed_32 (const void *p) |
| 651 | { |
| 652 | const bfd_byte *addr = (const bfd_byte *) p; |
| 653 | unsigned long v; |
| 654 | |
| 655 | v = (unsigned long) addr[0] << 24; |
| 656 | v |= (unsigned long) addr[1] << 16; |
| 657 | v |= (unsigned long) addr[2] << 8; |
| 658 | v |= (unsigned long) addr[3]; |
| 659 | return COERCE32 (v); |
| 660 | } |
| 661 | |
| 662 | bfd_signed_vma |
| 663 | bfd_getl_signed_32 (const void *p) |
| 664 | { |
| 665 | const bfd_byte *addr = (const bfd_byte *) p; |
| 666 | unsigned long v; |
| 667 | |
| 668 | v = (unsigned long) addr[0]; |
| 669 | v |= (unsigned long) addr[1] << 8; |
| 670 | v |= (unsigned long) addr[2] << 16; |
| 671 | v |= (unsigned long) addr[3] << 24; |
| 672 | return COERCE32 (v); |
| 673 | } |
| 674 | |
| 675 | bfd_uint64_t |
| 676 | bfd_getb64 (const void *p ATTRIBUTE_UNUSED) |
| 677 | { |
| 678 | #ifdef BFD_HOST_64_BIT |
| 679 | const bfd_byte *addr = (const bfd_byte *) p; |
| 680 | bfd_uint64_t v; |
| 681 | |
| 682 | v = addr[0]; v <<= 8; |
| 683 | v |= addr[1]; v <<= 8; |
| 684 | v |= addr[2]; v <<= 8; |
| 685 | v |= addr[3]; v <<= 8; |
| 686 | v |= addr[4]; v <<= 8; |
| 687 | v |= addr[5]; v <<= 8; |
| 688 | v |= addr[6]; v <<= 8; |
| 689 | v |= addr[7]; |
| 690 | |
| 691 | return v; |
| 692 | #else |
| 693 | BFD_FAIL(); |
| 694 | return 0; |
| 695 | #endif |
| 696 | } |
| 697 | |
| 698 | bfd_uint64_t |
| 699 | bfd_getl64 (const void *p ATTRIBUTE_UNUSED) |
| 700 | { |
| 701 | #ifdef BFD_HOST_64_BIT |
| 702 | const bfd_byte *addr = (const bfd_byte *) p; |
| 703 | bfd_uint64_t v; |
| 704 | |
| 705 | v = addr[7]; v <<= 8; |
| 706 | v |= addr[6]; v <<= 8; |
| 707 | v |= addr[5]; v <<= 8; |
| 708 | v |= addr[4]; v <<= 8; |
| 709 | v |= addr[3]; v <<= 8; |
| 710 | v |= addr[2]; v <<= 8; |
| 711 | v |= addr[1]; v <<= 8; |
| 712 | v |= addr[0]; |
| 713 | |
| 714 | return v; |
| 715 | #else |
| 716 | BFD_FAIL(); |
| 717 | return 0; |
| 718 | #endif |
| 719 | |
| 720 | } |
| 721 | |
| 722 | bfd_int64_t |
| 723 | bfd_getb_signed_64 (const void *p ATTRIBUTE_UNUSED) |
| 724 | { |
| 725 | #ifdef BFD_HOST_64_BIT |
| 726 | const bfd_byte *addr = (const bfd_byte *) p; |
| 727 | bfd_uint64_t v; |
| 728 | |
| 729 | v = addr[0]; v <<= 8; |
| 730 | v |= addr[1]; v <<= 8; |
| 731 | v |= addr[2]; v <<= 8; |
| 732 | v |= addr[3]; v <<= 8; |
| 733 | v |= addr[4]; v <<= 8; |
| 734 | v |= addr[5]; v <<= 8; |
| 735 | v |= addr[6]; v <<= 8; |
| 736 | v |= addr[7]; |
| 737 | |
| 738 | return COERCE64 (v); |
| 739 | #else |
| 740 | BFD_FAIL(); |
| 741 | return 0; |
| 742 | #endif |
| 743 | } |
| 744 | |
| 745 | bfd_int64_t |
| 746 | bfd_getl_signed_64 (const void *p ATTRIBUTE_UNUSED) |
| 747 | { |
| 748 | #ifdef BFD_HOST_64_BIT |
| 749 | const bfd_byte *addr = (const bfd_byte *) p; |
| 750 | bfd_uint64_t v; |
| 751 | |
| 752 | v = addr[7]; v <<= 8; |
| 753 | v |= addr[6]; v <<= 8; |
| 754 | v |= addr[5]; v <<= 8; |
| 755 | v |= addr[4]; v <<= 8; |
| 756 | v |= addr[3]; v <<= 8; |
| 757 | v |= addr[2]; v <<= 8; |
| 758 | v |= addr[1]; v <<= 8; |
| 759 | v |= addr[0]; |
| 760 | |
| 761 | return COERCE64 (v); |
| 762 | #else |
| 763 | BFD_FAIL(); |
| 764 | return 0; |
| 765 | #endif |
| 766 | } |
| 767 | |
| 768 | void |
| 769 | bfd_putb32 (bfd_vma data, void *p) |
| 770 | { |
| 771 | bfd_byte *addr = (bfd_byte *) p; |
| 772 | addr[0] = (data >> 24) & 0xff; |
| 773 | addr[1] = (data >> 16) & 0xff; |
| 774 | addr[2] = (data >> 8) & 0xff; |
| 775 | addr[3] = data & 0xff; |
| 776 | } |
| 777 | |
| 778 | void |
| 779 | bfd_putl32 (bfd_vma data, void *p) |
| 780 | { |
| 781 | bfd_byte *addr = (bfd_byte *) p; |
| 782 | addr[0] = data & 0xff; |
| 783 | addr[1] = (data >> 8) & 0xff; |
| 784 | addr[2] = (data >> 16) & 0xff; |
| 785 | addr[3] = (data >> 24) & 0xff; |
| 786 | } |
| 787 | |
| 788 | void |
| 789 | bfd_putb64 (bfd_uint64_t data ATTRIBUTE_UNUSED, void *p ATTRIBUTE_UNUSED) |
| 790 | { |
| 791 | #ifdef BFD_HOST_64_BIT |
| 792 | bfd_byte *addr = (bfd_byte *) p; |
| 793 | addr[0] = (data >> (7*8)) & 0xff; |
| 794 | addr[1] = (data >> (6*8)) & 0xff; |
| 795 | addr[2] = (data >> (5*8)) & 0xff; |
| 796 | addr[3] = (data >> (4*8)) & 0xff; |
| 797 | addr[4] = (data >> (3*8)) & 0xff; |
| 798 | addr[5] = (data >> (2*8)) & 0xff; |
| 799 | addr[6] = (data >> (1*8)) & 0xff; |
| 800 | addr[7] = (data >> (0*8)) & 0xff; |
| 801 | #else |
| 802 | BFD_FAIL(); |
| 803 | #endif |
| 804 | } |
| 805 | |
| 806 | void |
| 807 | bfd_putl64 (bfd_uint64_t data ATTRIBUTE_UNUSED, void *p ATTRIBUTE_UNUSED) |
| 808 | { |
| 809 | #ifdef BFD_HOST_64_BIT |
| 810 | bfd_byte *addr = (bfd_byte *) p; |
| 811 | addr[7] = (data >> (7*8)) & 0xff; |
| 812 | addr[6] = (data >> (6*8)) & 0xff; |
| 813 | addr[5] = (data >> (5*8)) & 0xff; |
| 814 | addr[4] = (data >> (4*8)) & 0xff; |
| 815 | addr[3] = (data >> (3*8)) & 0xff; |
| 816 | addr[2] = (data >> (2*8)) & 0xff; |
| 817 | addr[1] = (data >> (1*8)) & 0xff; |
| 818 | addr[0] = (data >> (0*8)) & 0xff; |
| 819 | #else |
| 820 | BFD_FAIL(); |
| 821 | #endif |
| 822 | } |
| 823 | |
| 824 | void |
| 825 | bfd_put_bits (bfd_uint64_t data, void *p, int bits, bfd_boolean big_p) |
| 826 | { |
| 827 | bfd_byte *addr = (bfd_byte *) p; |
| 828 | int i; |
| 829 | int bytes; |
| 830 | |
| 831 | if (bits % 8 != 0) |
| 832 | abort (); |
| 833 | |
| 834 | bytes = bits / 8; |
| 835 | for (i = 0; i < bytes; i++) |
| 836 | { |
| 837 | int addr_index = big_p ? bytes - i - 1 : i; |
| 838 | |
| 839 | addr[addr_index] = data & 0xff; |
| 840 | data >>= 8; |
| 841 | } |
| 842 | } |
| 843 | |
| 844 | bfd_uint64_t |
| 845 | bfd_get_bits (const void *p, int bits, bfd_boolean big_p) |
| 846 | { |
| 847 | const bfd_byte *addr = (const bfd_byte *) p; |
| 848 | bfd_uint64_t data; |
| 849 | int i; |
| 850 | int bytes; |
| 851 | |
| 852 | if (bits % 8 != 0) |
| 853 | abort (); |
| 854 | |
| 855 | data = 0; |
| 856 | bytes = bits / 8; |
| 857 | for (i = 0; i < bytes; i++) |
| 858 | { |
| 859 | int addr_index = big_p ? i : bytes - i - 1; |
| 860 | |
| 861 | data = (data << 8) | addr[addr_index]; |
| 862 | } |
| 863 | |
| 864 | return data; |
| 865 | } |
| 866 | \f |
| 867 | /* Default implementation */ |
| 868 | |
| 869 | bfd_boolean |
| 870 | _bfd_generic_get_section_contents (bfd *abfd, |
| 871 | sec_ptr section, |
| 872 | void *location, |
| 873 | file_ptr offset, |
| 874 | bfd_size_type count) |
| 875 | { |
| 876 | bfd_size_type sz; |
| 877 | if (count == 0) |
| 878 | return TRUE; |
| 879 | |
| 880 | if (section->compress_status != COMPRESS_SECTION_NONE) |
| 881 | { |
| 882 | _bfd_error_handler |
| 883 | /* xgettext:c-format */ |
| 884 | (_("%pB: unable to get decompressed section %pA"), |
| 885 | abfd, section); |
| 886 | bfd_set_error (bfd_error_invalid_operation); |
| 887 | return FALSE; |
| 888 | } |
| 889 | |
| 890 | /* We do allow reading of a section after bfd_final_link has |
| 891 | written the contents out to disk. In that situation, rawsize is |
| 892 | just a stale version of size, so ignore it. Otherwise we must be |
| 893 | reading an input section, where rawsize, if different to size, |
| 894 | is the on-disk size. */ |
| 895 | if (abfd->direction != write_direction && section->rawsize != 0) |
| 896 | sz = section->rawsize; |
| 897 | else |
| 898 | sz = section->size; |
| 899 | if (offset + count < count |
| 900 | || offset + count > sz |
| 901 | || (abfd->my_archive != NULL |
| 902 | && !bfd_is_thin_archive (abfd->my_archive) |
| 903 | && ((ufile_ptr) section->filepos + offset + count |
| 904 | > arelt_size (abfd)))) |
| 905 | { |
| 906 | bfd_set_error (bfd_error_invalid_operation); |
| 907 | return FALSE; |
| 908 | } |
| 909 | |
| 910 | if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 |
| 911 | || bfd_bread (location, count, abfd) != count) |
| 912 | return FALSE; |
| 913 | |
| 914 | return TRUE; |
| 915 | } |
| 916 | |
| 917 | bfd_boolean |
| 918 | _bfd_generic_get_section_contents_in_window |
| 919 | (bfd *abfd ATTRIBUTE_UNUSED, |
| 920 | sec_ptr section ATTRIBUTE_UNUSED, |
| 921 | bfd_window *w ATTRIBUTE_UNUSED, |
| 922 | file_ptr offset ATTRIBUTE_UNUSED, |
| 923 | bfd_size_type count ATTRIBUTE_UNUSED) |
| 924 | { |
| 925 | #ifdef USE_MMAP |
| 926 | bfd_size_type sz; |
| 927 | |
| 928 | if (count == 0) |
| 929 | return TRUE; |
| 930 | if (abfd->xvec->_bfd_get_section_contents |
| 931 | != _bfd_generic_get_section_contents) |
| 932 | { |
| 933 | /* We don't know what changes the bfd's get_section_contents |
| 934 | method may have to make. So punt trying to map the file |
| 935 | window, and let get_section_contents do its thing. */ |
| 936 | /* @@ FIXME : If the internal window has a refcount of 1 and was |
| 937 | allocated with malloc instead of mmap, just reuse it. */ |
| 938 | bfd_free_window (w); |
| 939 | w->i = bfd_zmalloc (sizeof (bfd_window_internal)); |
| 940 | if (w->i == NULL) |
| 941 | return FALSE; |
| 942 | w->i->data = bfd_malloc (count); |
| 943 | if (w->i->data == NULL) |
| 944 | { |
| 945 | free (w->i); |
| 946 | w->i = NULL; |
| 947 | return FALSE; |
| 948 | } |
| 949 | w->i->mapped = 0; |
| 950 | w->i->refcount = 1; |
| 951 | w->size = w->i->size = count; |
| 952 | w->data = w->i->data; |
| 953 | return bfd_get_section_contents (abfd, section, w->data, offset, count); |
| 954 | } |
| 955 | if (abfd->direction != write_direction && section->rawsize != 0) |
| 956 | sz = section->rawsize; |
| 957 | else |
| 958 | sz = section->size; |
| 959 | if (offset + count < count |
| 960 | || offset + count > sz |
| 961 | || (abfd->my_archive != NULL |
| 962 | && !bfd_is_thin_archive (abfd->my_archive) |
| 963 | && ((ufile_ptr) section->filepos + offset + count |
| 964 | > arelt_size (abfd))) |
| 965 | || ! bfd_get_file_window (abfd, section->filepos + offset, count, w, |
| 966 | TRUE)) |
| 967 | return FALSE; |
| 968 | return TRUE; |
| 969 | #else |
| 970 | abort (); |
| 971 | #endif |
| 972 | } |
| 973 | |
| 974 | /* This generic function can only be used in implementations where creating |
| 975 | NEW sections is disallowed. It is useful in patching existing sections |
| 976 | in read-write files, though. See other set_section_contents functions |
| 977 | to see why it doesn't work for new sections. */ |
| 978 | bfd_boolean |
| 979 | _bfd_generic_set_section_contents (bfd *abfd, |
| 980 | sec_ptr section, |
| 981 | const void *location, |
| 982 | file_ptr offset, |
| 983 | bfd_size_type count) |
| 984 | { |
| 985 | if (count == 0) |
| 986 | return TRUE; |
| 987 | |
| 988 | if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 |
| 989 | || bfd_bwrite (location, count, abfd) != count) |
| 990 | return FALSE; |
| 991 | |
| 992 | return TRUE; |
| 993 | } |
| 994 | |
| 995 | /* |
| 996 | INTERNAL_FUNCTION |
| 997 | bfd_log2 |
| 998 | |
| 999 | SYNOPSIS |
| 1000 | unsigned int bfd_log2 (bfd_vma x); |
| 1001 | |
| 1002 | DESCRIPTION |
| 1003 | Return the log base 2 of the value supplied, rounded up. E.g., an |
| 1004 | @var{x} of 1025 returns 11. A @var{x} of 0 returns 0. |
| 1005 | */ |
| 1006 | |
| 1007 | unsigned int |
| 1008 | bfd_log2 (bfd_vma x) |
| 1009 | { |
| 1010 | unsigned int result = 0; |
| 1011 | |
| 1012 | if (x <= 1) |
| 1013 | return result; |
| 1014 | --x; |
| 1015 | do |
| 1016 | ++result; |
| 1017 | while ((x >>= 1) != 0); |
| 1018 | return result; |
| 1019 | } |
| 1020 | |
| 1021 | bfd_boolean |
| 1022 | bfd_generic_is_local_label_name (bfd *abfd, const char *name) |
| 1023 | { |
| 1024 | char locals_prefix = (bfd_get_symbol_leading_char (abfd) == '_') ? 'L' : '.'; |
| 1025 | |
| 1026 | return name[0] == locals_prefix; |
| 1027 | } |
| 1028 | |
| 1029 | /* Give a warning at runtime if someone compiles code which calls |
| 1030 | old routines. */ |
| 1031 | |
| 1032 | void |
| 1033 | _bfd_warn_deprecated (const char *what, |
| 1034 | const char *file, |
| 1035 | int line, |
| 1036 | const char *func) |
| 1037 | { |
| 1038 | /* Poor man's tracking of functions we've already warned about. */ |
| 1039 | static size_t mask = 0; |
| 1040 | |
| 1041 | if (~(size_t) func & ~mask) |
| 1042 | { |
| 1043 | fflush (stdout); |
| 1044 | /* Note: separate sentences in order to allow |
| 1045 | for translation into other languages. */ |
| 1046 | if (func) |
| 1047 | /* xgettext:c-format */ |
| 1048 | fprintf (stderr, _("Deprecated %s called at %s line %d in %s\n"), |
| 1049 | what, file, line, func); |
| 1050 | else |
| 1051 | fprintf (stderr, _("Deprecated %s called\n"), what); |
| 1052 | fflush (stderr); |
| 1053 | mask |= ~(size_t) func; |
| 1054 | } |
| 1055 | } |
| 1056 | |
| 1057 | /* Helper function for reading uleb128 encoded data. */ |
| 1058 | |
| 1059 | bfd_vma |
| 1060 | _bfd_read_unsigned_leb128 (bfd *abfd ATTRIBUTE_UNUSED, |
| 1061 | bfd_byte *buf, |
| 1062 | unsigned int *bytes_read_ptr) |
| 1063 | { |
| 1064 | bfd_vma result; |
| 1065 | unsigned int num_read; |
| 1066 | unsigned int shift; |
| 1067 | unsigned char byte; |
| 1068 | |
| 1069 | result = 0; |
| 1070 | shift = 0; |
| 1071 | num_read = 0; |
| 1072 | do |
| 1073 | { |
| 1074 | byte = bfd_get_8 (abfd, buf); |
| 1075 | buf++; |
| 1076 | num_read++; |
| 1077 | result |= (((bfd_vma) byte & 0x7f) << shift); |
| 1078 | shift += 7; |
| 1079 | } |
| 1080 | while (byte & 0x80); |
| 1081 | *bytes_read_ptr = num_read; |
| 1082 | return result; |
| 1083 | } |
| 1084 | |
| 1085 | /* Read in a LEB128 encoded value from ABFD starting at DATA. |
| 1086 | If SIGN is true, return a signed LEB128 value. |
| 1087 | If LENGTH_RETURN is not NULL, return in it the number of bytes read. |
| 1088 | No bytes will be read at address END or beyond. */ |
| 1089 | |
| 1090 | bfd_vma |
| 1091 | _bfd_safe_read_leb128 (bfd *abfd ATTRIBUTE_UNUSED, |
| 1092 | bfd_byte *data, |
| 1093 | unsigned int *length_return, |
| 1094 | bfd_boolean sign, |
| 1095 | const bfd_byte * const end) |
| 1096 | { |
| 1097 | bfd_vma result = 0; |
| 1098 | unsigned int num_read = 0; |
| 1099 | unsigned int shift = 0; |
| 1100 | unsigned char byte = 0; |
| 1101 | |
| 1102 | while (data < end) |
| 1103 | { |
| 1104 | byte = bfd_get_8 (abfd, data); |
| 1105 | data++; |
| 1106 | num_read++; |
| 1107 | |
| 1108 | result |= ((bfd_vma) (byte & 0x7f)) << shift; |
| 1109 | |
| 1110 | shift += 7; |
| 1111 | if ((byte & 0x80) == 0) |
| 1112 | break; |
| 1113 | } |
| 1114 | |
| 1115 | if (length_return != NULL) |
| 1116 | *length_return = num_read; |
| 1117 | |
| 1118 | if (sign && (shift < 8 * sizeof (result)) && (byte & 0x40)) |
| 1119 | result |= -((bfd_vma) 1 << shift); |
| 1120 | |
| 1121 | return result; |
| 1122 | } |
| 1123 | |
| 1124 | /* Helper function for reading sleb128 encoded data. */ |
| 1125 | |
| 1126 | bfd_signed_vma |
| 1127 | _bfd_read_signed_leb128 (bfd *abfd ATTRIBUTE_UNUSED, |
| 1128 | bfd_byte *buf, |
| 1129 | unsigned int *bytes_read_ptr) |
| 1130 | { |
| 1131 | bfd_vma result; |
| 1132 | unsigned int shift; |
| 1133 | unsigned int num_read; |
| 1134 | unsigned char byte; |
| 1135 | |
| 1136 | result = 0; |
| 1137 | shift = 0; |
| 1138 | num_read = 0; |
| 1139 | do |
| 1140 | { |
| 1141 | byte = bfd_get_8 (abfd, buf); |
| 1142 | buf ++; |
| 1143 | num_read ++; |
| 1144 | result |= (((bfd_vma) byte & 0x7f) << shift); |
| 1145 | shift += 7; |
| 1146 | } |
| 1147 | while (byte & 0x80); |
| 1148 | if (shift < 8 * sizeof (result) && (byte & 0x40)) |
| 1149 | result |= (((bfd_vma) -1) << shift); |
| 1150 | *bytes_read_ptr = num_read; |
| 1151 | return result; |
| 1152 | } |
| 1153 | |
| 1154 | bfd_boolean |
| 1155 | _bfd_generic_init_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED, |
| 1156 | asection *isec ATTRIBUTE_UNUSED, |
| 1157 | bfd *obfd ATTRIBUTE_UNUSED, |
| 1158 | asection *osec ATTRIBUTE_UNUSED, |
| 1159 | struct bfd_link_info *link_info ATTRIBUTE_UNUSED) |
| 1160 | { |
| 1161 | return TRUE; |
| 1162 | } |