Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame^] | 1 | /* Internal interfaces for libelf. |
| 2 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2005 Red Hat, Inc. |
| 3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 1998. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation, version 2. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software Foundation, |
| 16 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 17 | |
| 18 | #ifndef _LIBELFP_H |
| 19 | #define _LIBELFP_H 1 |
| 20 | |
| 21 | #include <ar.h> |
| 22 | #include <gelf.h> |
| 23 | #include <stdint.h> |
| 24 | |
| 25 | /* gettext helper macros. */ |
| 26 | #define _(Str) dgettext ("libelf", Str) |
| 27 | |
| 28 | |
| 29 | /* Helper Macros to write 32 bit and 64 bit functions. */ |
| 30 | #define __elfw2_(Bits, Name) __elf##Bits##_##Name |
| 31 | #define elfw2_(Bits, Name) elf##Bits##_##Name |
| 32 | #define ElfW2_(Bits, Name) Elf##Bits##_##Name |
| 33 | #define ELFW2_(Bits, Name) ELF##Bits##_##Name |
| 34 | #define ELFW_(Name, Bits) Name##Bits |
| 35 | #define __elfw2(Bits, Name) __elfw2_(Bits, Name) |
| 36 | #define elfw2(Bits, Name) elfw2_(Bits, Name) |
| 37 | #define ElfW2(Bits, Name) ElfW2_(Bits, Name) |
| 38 | #define ELFW2(Bits, Name) ELFW2_(Bits, Name) |
| 39 | #define ELFW(Name, Bits) ELFW_(Name, Bits) |
| 40 | |
| 41 | |
| 42 | /* Sizes of the external types, for 32 bits objects. */ |
| 43 | #define ELF32_FSZ_ADDR 4 |
| 44 | #define ELF32_FSZ_OFF 4 |
| 45 | #define ELF32_FSZ_HALF 2 |
| 46 | #define ELF32_FSZ_WORD 4 |
| 47 | #define ELF32_FSZ_SWORD 4 |
| 48 | #define ELF32_FSZ_XWORD 8 |
| 49 | #define ELF32_FSZ_SXWORD 8 |
| 50 | |
| 51 | /* Same for 64 bits objects. */ |
| 52 | #define ELF64_FSZ_ADDR 8 |
| 53 | #define ELF64_FSZ_OFF 8 |
| 54 | #define ELF64_FSZ_HALF 2 |
| 55 | #define ELF64_FSZ_WORD 4 |
| 56 | #define ELF64_FSZ_SWORD 4 |
| 57 | #define ELF64_FSZ_XWORD 8 |
| 58 | #define ELF64_FSZ_SXWORD 8 |
| 59 | |
| 60 | |
| 61 | /* This is an extension of the ELF_F_* enumeration. The values here are |
| 62 | not part of the library interface, they are only used internally. */ |
| 63 | enum |
| 64 | { |
| 65 | ELF_F_MMAPPED = 0x40, |
| 66 | ELF_F_MALLOCED = 0x80, |
| 67 | ELF_F_FILEDATA = 0x100 |
| 68 | }; |
| 69 | |
| 70 | |
| 71 | /* Get definition of all the external types. */ |
| 72 | #include "exttypes.h" |
| 73 | |
| 74 | |
| 75 | /* Error values. */ |
| 76 | enum |
| 77 | { |
| 78 | ELF_E_NOERROR = 0, |
| 79 | ELF_E_UNKNOWN_ERROR, |
| 80 | ELF_E_UNKNOWN_VERSION, |
| 81 | ELF_E_UNKNOWN_TYPE, |
| 82 | ELF_E_INVALID_HANDLE, |
| 83 | ELF_E_SOURCE_SIZE, |
| 84 | ELF_E_DEST_SIZE, |
| 85 | ELF_E_INVALID_ENCODING, |
| 86 | ELF_E_NOMEM, |
| 87 | ELF_E_INVALID_FILE, |
| 88 | ELF_E_INVALID_OP, |
| 89 | ELF_E_NO_VERSION, |
| 90 | ELF_E_INVALID_CMD, |
| 91 | ELF_E_RANGE, |
| 92 | ELF_E_ARCHIVE_FMAG, |
| 93 | ELF_E_INVALID_ARCHIVE, |
| 94 | ELF_E_NO_ARCHIVE, |
| 95 | ELF_E_NO_INDEX, |
| 96 | ELF_E_READ_ERROR, |
| 97 | ELF_E_WRITE_ERROR, |
| 98 | ELF_E_INVALID_CLASS, |
| 99 | ELF_E_INVALID_INDEX, |
| 100 | ELF_E_INVALID_OPERAND, |
| 101 | ELF_E_INVALID_SECTION, |
| 102 | ELF_E_INVALID_COMMAND, |
| 103 | ELF_E_WRONG_ORDER_EHDR, |
| 104 | ELF_E_FD_DISABLED, |
| 105 | ELF_E_FD_MISMATCH, |
| 106 | ELF_E_OFFSET_RANGE, |
| 107 | ELF_E_NOT_NUL_SECTION, |
| 108 | ELF_E_DATA_MISMATCH, |
| 109 | ELF_E_INVALID_SECTION_HEADER, |
| 110 | ELF_E_INVALID_DATA, |
| 111 | ELF_E_DATA_ENCODING, |
| 112 | ELF_E_SECTION_TOO_SMALL, |
| 113 | ELF_E_INVALID_ALIGN, |
| 114 | ELF_E_INVALID_SHENTSIZE, |
| 115 | ELF_E_UPDATE_RO, |
| 116 | ELF_E_NOFILE, |
| 117 | ELF_E_GROUP_NOT_REL, |
| 118 | ELF_E_INVALID_PHDR, |
| 119 | ELF_E_NO_PHDR, |
| 120 | /* Keep this as the last entry. */ |
| 121 | ELF_E_NUM |
| 122 | }; |
| 123 | |
| 124 | |
| 125 | /* The visible `Elf_Data' type is not sufficent for some operations due |
| 126 | to a misdesigned interface. Extend it for internal purposes. */ |
| 127 | typedef struct |
| 128 | { |
| 129 | Elf_Data d; |
| 130 | Elf_Scn *s; |
| 131 | } Elf_Data_Scn; |
| 132 | |
| 133 | |
| 134 | /* List of `Elf_Data' descriptors. This is what makes up the section |
| 135 | contents. */ |
| 136 | typedef struct Elf_Data_List |
| 137 | { |
| 138 | /* `data' *must* be the first element in the struct. */ |
| 139 | Elf_Data_Scn data; |
| 140 | struct Elf_Data_List *next; |
| 141 | int flags; |
| 142 | } Elf_Data_List; |
| 143 | |
| 144 | |
| 145 | /* Descriptor for ELF section. */ |
| 146 | struct Elf_Scn |
| 147 | { |
| 148 | /* We have to distinguish several different situations: |
| 149 | |
| 150 | 1. the section is user created. Therefore there is no file or memory |
| 151 | region to read the data from. Here we have two different subcases: |
| 152 | |
| 153 | a) data was not yet added (before the first `elf_newdata' call) |
| 154 | |
| 155 | b) at least one data set is available |
| 156 | |
| 157 | 2. this is a section from a file/memory region. We have to read the |
| 158 | current content in one data block if we have to. But we don't |
| 159 | read the data until it is necessary. So we have the subcases: |
| 160 | |
| 161 | a) the section in the file has size zero (for whatever reason) |
| 162 | |
| 163 | b) the data of the file is not (yet) read |
| 164 | |
| 165 | c) the data is read and available. |
| 166 | |
| 167 | In addition to this we have different data sets, the raw and the converted |
| 168 | data. This distinction only exists for the data read from the file. |
| 169 | All user-added data set (all but the first when read from the file or |
| 170 | all of them for user-create sections) are the same in both formats. |
| 171 | We don't create the converted data before it is necessary. |
| 172 | |
| 173 | The `data_read' element signals whether data is available in the |
| 174 | raw format. |
| 175 | |
| 176 | If there is data from the file/memory region or if read one data |
| 177 | set is added the `rawdata_list_read' pointer in non-NULL and points |
| 178 | to the last filled data set. `raw_datalist_rear' is therefore NULL |
| 179 | only if there is no data set at all. |
| 180 | |
| 181 | This so far allows to distinguish all but two cases (given that the |
| 182 | `rawdata_list' and `data_list' entries are initialized to zero) is |
| 183 | between not yet loaded data from the file/memory region and a section |
| 184 | with zero size and type ELF_T_BYTE. */ |
| 185 | Elf_Data_List data_list; /* List of data buffers. */ |
| 186 | Elf_Data_List *data_list_rear; /* Pointer to the rear of the data list. */ |
| 187 | |
| 188 | Elf_Data_Scn rawdata; /* Uninterpreted data of the section. */ |
| 189 | |
| 190 | int data_read; /* Nonzero if the section was created by the |
| 191 | user or if the data from the file/memory |
| 192 | is read. */ |
| 193 | |
| 194 | size_t index; /* Index of this section. */ |
| 195 | struct Elf *elf; /* The underlying ELF file. */ |
| 196 | |
| 197 | union |
| 198 | { |
| 199 | Elf32_Shdr *e32; /* Pointer to 32bit section header. */ |
| 200 | Elf64_Shdr *e64; /* Pointer to 64bit section header. */ |
| 201 | } shdr; |
| 202 | |
| 203 | unsigned int shdr_flags; /* Section header modified? */ |
| 204 | unsigned int flags; /* Section changed in size? */ |
| 205 | |
| 206 | char *rawdata_base; /* The unmodified data of the section. */ |
| 207 | char *data_base; /* The converted data of the section. */ |
| 208 | |
| 209 | struct Elf_ScnList *list; /* Pointer the the section list element the |
| 210 | data is in. */ |
| 211 | }; |
| 212 | |
| 213 | |
| 214 | /* List of section. */ |
| 215 | typedef struct Elf_ScnList |
| 216 | { |
| 217 | unsigned int cnt; /* Number of elements of 'data' used. */ |
| 218 | unsigned int max; /* Number of elements of 'data' allocated. */ |
| 219 | struct Elf_ScnList *next; /* Next block of sections. */ |
| 220 | struct Elf_Scn data[0]; /* Section data. */ |
| 221 | } Elf_ScnList; |
| 222 | |
| 223 | |
| 224 | /* The ELF descriptor. */ |
| 225 | struct Elf |
| 226 | { |
| 227 | /* What kind of file is underneath (ELF file, archive...). */ |
| 228 | Elf_Kind kind; |
| 229 | |
| 230 | /* Command used to create this descriptor. */ |
| 231 | Elf_Cmd cmd; |
| 232 | |
| 233 | /* The binary class. */ |
| 234 | unsigned int class; |
| 235 | |
| 236 | /* The used file descriptor. -1 if not available anymore. */ |
| 237 | int fildes; |
| 238 | |
| 239 | /* Offset in the archive this file starts or zero. */ |
| 240 | off_t start_offset; |
| 241 | |
| 242 | /* Size of the file in the archive or the entire file size, or ~0 |
| 243 | for an (yet) unknown size. */ |
| 244 | size_t maximum_size; |
| 245 | |
| 246 | /* Address to which the file was mapped. NULL if not mapped. */ |
| 247 | void *map_address; |
| 248 | |
| 249 | /* Describes the way the memory was allocated and if the dirty bit is |
| 250 | signalled it means that the whole file has to be rewritten since |
| 251 | the layout changed. */ |
| 252 | int flags; |
| 253 | |
| 254 | /* When created for an archive member this points to the descriptor |
| 255 | for the archive. */ |
| 256 | Elf *parent; |
| 257 | |
| 258 | /* Lock to handle multithreaded programs. */ |
| 259 | rwlock_define (,lock); |
| 260 | |
| 261 | /* Reference counting for the descriptor. */ |
| 262 | int ref_count; |
| 263 | |
| 264 | struct Elf *next; /* Used in list of archive descriptors. */ |
| 265 | |
| 266 | union |
| 267 | { |
| 268 | struct |
| 269 | { |
| 270 | int ehdr_flags; /* Flags (dirty) for ELF header. */ |
| 271 | int phdr_flags; /* Flags (dirty|malloc) for program header. */ |
| 272 | int shdr_malloced; /* Nonzero if shdr array was allocated. */ |
| 273 | |
| 274 | /* The next fields are only useful when testing for ==/!= NULL. */ |
| 275 | void *ehdr; |
| 276 | void *shdr; |
| 277 | void *phdr; |
| 278 | |
| 279 | Elf_ScnList *scns_last; /* Last element in the section list. |
| 280 | If NULL the data has not yet been |
| 281 | read from the file. */ |
| 282 | unsigned int scnincr; /* Number of sections allocate the last |
| 283 | time. */ |
| 284 | off64_t sizestr_offset; /* Offset of the size string in the parent |
| 285 | if this is an archive member. */ |
| 286 | } elf; |
| 287 | |
| 288 | struct |
| 289 | { |
| 290 | int ehdr_flags; /* Flags (dirty) for ELF header. */ |
| 291 | int phdr_flags; /* Flags (dirty|malloc) for program header. */ |
| 292 | int shdr_malloced; /* Nonzero if shdr array was allocated. */ |
| 293 | |
| 294 | Elf32_Ehdr *ehdr; /* Pointer to the ELF header. This is |
| 295 | never malloced. */ |
| 296 | Elf32_Shdr *shdr; /* Used when reading from a file. */ |
| 297 | Elf32_Phdr *phdr; /* Pointer to the program header array. */ |
| 298 | Elf_ScnList *scns_last; /* Last element in the section list. |
| 299 | If NULL the data has not yet been |
| 300 | read from the file. */ |
| 301 | unsigned int scnincr; /* Number of sections allocate the last |
| 302 | time. */ |
| 303 | off64_t sizestr_offset; /* Offset of the size string in the parent |
| 304 | if this is an archive member. */ |
| 305 | Elf32_Ehdr ehdr_mem; /* Memory used for ELF header when not |
| 306 | mmaped. */ |
| 307 | char __e32scnspad[sizeof (Elf64_Ehdr) - sizeof (Elf32_Ehdr)]; |
| 308 | |
| 309 | /* The section array. */ |
| 310 | Elf_ScnList scns; |
| 311 | } elf32; |
| 312 | |
| 313 | struct |
| 314 | { |
| 315 | int ehdr_flags; /* Flags (dirty) for ELF header. */ |
| 316 | int phdr_flags; /* Flags (dirty|malloc) for program header. */ |
| 317 | int shdr_malloced; /* Nonzero if shdr array was allocated. */ |
| 318 | |
| 319 | Elf64_Ehdr *ehdr; /* Pointer to the ELF header. This is |
| 320 | never malloced. */ |
| 321 | Elf64_Shdr *shdr; /* Used when reading from a file. */ |
| 322 | Elf64_Phdr *phdr; /* Pointer to the program header array. */ |
| 323 | Elf_ScnList *scns_last; /* Last element in the section list. |
| 324 | If NULL the data has not yet been |
| 325 | read from the file. */ |
| 326 | unsigned int scnincr; /* Number of sections allocate the last |
| 327 | time. */ |
| 328 | off64_t sizestr_offset; /* Offset of the size string in the parent |
| 329 | if this is an archive member. */ |
| 330 | Elf64_Ehdr ehdr_mem; /* Memory used for ELF header when not |
| 331 | mmaped. */ |
| 332 | |
| 333 | /* The section array. */ |
| 334 | Elf_ScnList scns; |
| 335 | } elf64; |
| 336 | |
| 337 | struct |
| 338 | { |
| 339 | int has_index; /* Set when file has index. 0 means |
| 340 | undecided, > 0 means it has one. */ |
| 341 | Elf_Arsym *ar_sym; /* Symbol table returned by elf_getarsym. */ |
| 342 | size_t ar_sym_num; /* Number of entries in `ar_sym'. */ |
| 343 | char *long_names; /* If no index is available but long names |
| 344 | are used this elements points to the data.*/ |
| 345 | size_t long_names_len; /* Length of the long name table. */ |
| 346 | off_t offset; /* Offset in file we are currently at. |
| 347 | elf_next() advances this to the next |
| 348 | member of the archive. */ |
| 349 | Elf_Arhdr elf_ar_hdr; /* Structure returned by 'elf_getarhdr'. */ |
| 350 | struct ar_hdr ar_hdr; /* Header read from file. */ |
| 351 | char ar_name[16]; /* NUL terminated ar_name of elf_ar_hdr. */ |
| 352 | char raw_name[17]; /* This is a buffer for the NUL terminated |
| 353 | named raw_name used in the elf_ar_hdr. */ |
| 354 | struct Elf *children; /* List of all descriptors for this archive. */ |
| 355 | } ar; |
| 356 | } state; |
| 357 | |
| 358 | /* There absolutely never must be anything following the union. */ |
| 359 | }; |
| 360 | |
| 361 | |
| 362 | /* Type of the conversion functions. These functions will convert the |
| 363 | byte order. */ |
| 364 | typedef void (*xfct_t) (void *, const void *, size_t, int); |
| 365 | |
| 366 | /* The table with the function pointers. */ |
| 367 | extern const xfct_t __elf_xfctstom[EV_NUM - 1][EV_NUM - 1][ELFCLASSNUM - 1][ELF_T_NUM] attribute_hidden; |
| 368 | extern const xfct_t __elf_xfctstof[EV_NUM - 1][EV_NUM - 1][ELFCLASSNUM - 1][ELF_T_NUM] attribute_hidden; |
| 369 | |
| 370 | |
| 371 | /* Array with sizes of the external types indexed by ELF version, binary |
| 372 | class, and type. */ |
| 373 | extern const size_t __libelf_type_sizes[EV_NUM - 1][ELFCLASSNUM - 1][ELF_T_NUM] attribute_hidden; |
| 374 | /* We often have to access the size for a type in the current version. */ |
| 375 | #if EV_NUM != 2 |
| 376 | # define elf_typesize(class,type,n) \ |
| 377 | elfw2(class,fsize) (type, n, __libelf_version) |
| 378 | #else |
| 379 | # define elf_typesize(class,type,n) \ |
| 380 | (__libelf_type_sizes[EV_CURRENT - 1][ELFW(ELFCLASS,class) - 1][type] * n) |
| 381 | #endif |
| 382 | |
| 383 | /* Currently selected version of the ELF specification. */ |
| 384 | extern unsigned int __libelf_version attribute_hidden; |
| 385 | |
| 386 | /* The byte value used for filling gaps. */ |
| 387 | extern int __libelf_fill_byte attribute_hidden; |
| 388 | |
| 389 | /* Nonzero if the version was set. */ |
| 390 | extern int __libelf_version_initialized attribute_hidden; |
| 391 | |
| 392 | |
| 393 | /* The libelf API does not have such a function but it is still useful. |
| 394 | Get the memory size for the given type. |
| 395 | |
| 396 | These functions cannot be marked internal since they are aliases |
| 397 | of the export elfXX_fsize functions.*/ |
| 398 | extern size_t __elf32_msize (Elf_Type __type, size_t __count, |
| 399 | unsigned int __version); |
| 400 | extern size_t __elf64_msize (Elf_Type __type, size_t __count, |
| 401 | unsigned int __version); |
| 402 | |
| 403 | |
| 404 | /* Create Elf descriptor from memory image. */ |
| 405 | extern Elf *__libelf_read_mmaped_file (int fildes, void *map_address, |
| 406 | off_t offset, size_t maxsize, |
| 407 | Elf_Cmd cmd, Elf *parent) |
| 408 | internal_function; |
| 409 | |
| 410 | /* Set error value. */ |
| 411 | extern void __libelf_seterrno (int value) internal_function; |
| 412 | |
| 413 | /* Get the next archive header. */ |
| 414 | extern int __libelf_next_arhdr (Elf *elf) internal_function; |
| 415 | |
| 416 | /* Read all of the file associated with the descriptor. */ |
| 417 | extern char *__libelf_readall (Elf *elf) internal_function; |
| 418 | |
| 419 | /* Read the complete section table and convert the byte order if necessary. */ |
| 420 | extern int __libelf_readsections (Elf *elf) internal_function; |
| 421 | |
| 422 | /* Store the information for the raw data in the `rawdata_list' element. */ |
| 423 | extern int __libelf_set_rawdata (Elf_Scn *scn) internal_function; |
| 424 | |
| 425 | |
| 426 | /* Helper functions for elf_update. */ |
| 427 | extern off_t __elf32_updatenull (Elf *elf, int *change_bop, size_t shnum) |
| 428 | internal_function; |
| 429 | extern off_t __elf64_updatenull (Elf *elf, int *change_bop, size_t shnum) |
| 430 | internal_function; |
| 431 | |
| 432 | extern int __elf32_updatemmap (Elf *elf, int change_bo, size_t shnum) |
| 433 | internal_function; |
| 434 | extern int __elf64_updatemmap (Elf *elf, int change_bo, size_t shnum) |
| 435 | internal_function; |
| 436 | extern int __elf32_updatefile (Elf *elf, int change_bo, size_t shnum) |
| 437 | internal_function; |
| 438 | extern int __elf64_updatefile (Elf *elf, int change_bo, size_t shnum) |
| 439 | internal_function; |
| 440 | |
| 441 | |
| 442 | /* Alias for exported functions to avoid PLT entries. */ |
| 443 | extern int __elf_end_internal (Elf *__elf); |
| 444 | extern Elf *__elf_begin_internal (int __fildes, Elf_Cmd __cmd, Elf *__ref) |
| 445 | attribute_hidden; |
| 446 | extern Elf32_Ehdr *__elf32_getehdr_internal (Elf *__elf) attribute_hidden; |
| 447 | extern Elf64_Ehdr *__elf64_getehdr_internal (Elf *__elf) attribute_hidden; |
| 448 | extern Elf32_Ehdr *__elf32_newehdr_internal (Elf *__elf) attribute_hidden; |
| 449 | extern Elf64_Ehdr *__elf64_newehdr_internal (Elf *__elf) attribute_hidden; |
| 450 | extern Elf32_Phdr *__elf32_getphdr_internal (Elf *__elf) attribute_hidden; |
| 451 | extern Elf64_Phdr *__elf64_getphdr_internal (Elf *__elf) attribute_hidden; |
| 452 | extern Elf32_Phdr *__elf32_newphdr_internal (Elf *__elf, size_t __cnt) |
| 453 | attribute_hidden; |
| 454 | extern Elf64_Phdr *__elf64_newphdr_internal (Elf *__elf, size_t __cnt) |
| 455 | attribute_hidden; |
| 456 | extern int __elf_getshnum_internal (Elf *__elf, size_t *__dst) |
| 457 | attribute_hidden; |
| 458 | extern int __elf_getshstrndx_internal (Elf *__elf, size_t *__dst) |
| 459 | attribute_hidden; |
| 460 | extern Elf32_Shdr *__elf32_getshdr_internal (Elf_Scn *__scn) attribute_hidden; |
| 461 | extern Elf64_Shdr *__elf64_getshdr_internal (Elf_Scn *__scn) attribute_hidden; |
| 462 | extern Elf_Scn *__elf_getscn_internal (Elf *__elf, size_t __index) |
| 463 | attribute_hidden; |
| 464 | extern Elf_Scn *__elf_nextscn_internal (Elf *__elf, Elf_Scn *__scn) |
| 465 | attribute_hidden; |
| 466 | extern Elf_Data *__elf_getdata_internal (Elf_Scn *__scn, Elf_Data *__data) |
| 467 | attribute_hidden; |
| 468 | extern Elf_Data *__elf_rawdata_internal (Elf_Scn *__scn, Elf_Data *__data) |
| 469 | attribute_hidden; |
| 470 | extern char *__elf_strptr_internal (Elf *__elf, size_t __index, |
| 471 | size_t __offset) attribute_hidden; |
| 472 | extern Elf_Data *__elf32_xlatetom_internal (Elf_Data *__dest, |
| 473 | const Elf_Data *__src, |
| 474 | unsigned int __encode) |
| 475 | attribute_hidden; |
| 476 | extern Elf_Data *__elf64_xlatetom_internal (Elf_Data *__dest, |
| 477 | const Elf_Data *__src, |
| 478 | unsigned int __encode) |
| 479 | attribute_hidden; |
| 480 | extern Elf_Data *__elf32_xlatetof_internal (Elf_Data *__dest, |
| 481 | const Elf_Data *__src, |
| 482 | unsigned int __encode) |
| 483 | attribute_hidden; |
| 484 | extern Elf_Data *__elf64_xlatetof_internal (Elf_Data *__dest, |
| 485 | const Elf_Data *__src, |
| 486 | unsigned int __encode) |
| 487 | attribute_hidden; |
| 488 | extern unsigned int __elf_version_internal (unsigned int __version) |
| 489 | attribute_hidden; |
| 490 | extern unsigned long int __elf_hash_internal (const char *__string) |
| 491 | __attribute__ ((__pure__, visibility ("hidden"))); |
| 492 | extern long int __elf32_checksum_internal (Elf *__elf) attribute_hidden; |
| 493 | extern long int __elf64_checksum_internal (Elf *__elf) attribute_hidden; |
| 494 | |
| 495 | |
| 496 | extern GElf_Ehdr *__gelf_getehdr_internal (Elf *__elf, GElf_Ehdr *__dest); |
| 497 | extern size_t __gelf_fsize_internal (Elf *__elf, Elf_Type __type, |
| 498 | size_t __count, unsigned int __version) |
| 499 | attribute_hidden; |
| 500 | extern GElf_Shdr *__gelf_getshdr_internal (Elf_Scn *__scn, GElf_Shdr *__dst) |
| 501 | attribute_hidden; |
| 502 | extern GElf_Sym *__gelf_getsym_internal (Elf_Data *__data, int __ndx, |
| 503 | GElf_Sym *__dst) attribute_hidden; |
| 504 | |
| 505 | |
| 506 | extern uint32_t __libelf_crc32 (uint32_t crc, unsigned char *buf, size_t len) |
| 507 | attribute_hidden; |
| 508 | |
| 509 | |
| 510 | /* We often have to update a flag iff a value changed. Make this |
| 511 | convenient. None of the parameters must have a side effect. */ |
| 512 | #ifdef __GNUC__ |
| 513 | # define update_if_changed(var, exp, flag) \ |
| 514 | do { \ |
| 515 | __typeof__ (var) *_var = &(var); \ |
| 516 | __typeof__ (exp) _exp = (exp); \ |
| 517 | if (*_var != _exp) \ |
| 518 | { \ |
| 519 | *_var = _exp; \ |
| 520 | (flag) |= ELF_F_DIRTY; \ |
| 521 | } \ |
| 522 | } while (0) |
| 523 | #else |
| 524 | # define update_if_changed(var, exp, flag) \ |
| 525 | do { \ |
| 526 | if ((var) != (exp)) \ |
| 527 | { \ |
| 528 | (var) = (exp); \ |
| 529 | (flag) |= ELF_F_DIRTY; \ |
| 530 | } \ |
| 531 | } while (0) |
| 532 | #endif |
| 533 | |
| 534 | #endif /* libelfP.h */ |