1 /* Macros to enable writing native and generic ELF access code. 2 Copyright (C) 2003 Red Hat, Inc. 3 Written by Ulrich Drepper <drepper (at) redhat.com>, 2003. 4 5 This program is Open Source software; you can redistribute it and/or 6 modify it under the terms of the Open Software License version 1.0 as 7 published by the Open Source Initiative. 8 9 You should have received a copy of the Open Software License along 10 with this program; if not, you may obtain a copy of the Open Software 11 License version 1.0 from http://www.opensource.org/licenses/osl.php or 12 by writing the Open Source Initiative c/o Lawrence Rosen, Esq., 13 3001 King Ranch Road, Ukiah, CA 95482. */ 14 15 #ifdef HAVE_CONFIG_H 16 # include <config.h> 17 #endif 18 19 #include <libebl.h> 20 21 22 /* By default the linker is handling all architectures. But it can 23 be configured to be a native-only linker. */ 24 #if NATIVE_ELF == 32 25 /* 32-bit only. */ 26 # define XElf_Ehdr Elf32_Ehdr 27 # define XElf_Shdr Elf32_Shdr 28 # define XElf_Off Elf32_Off 29 # define XElf_Addr Elf32_Addr 30 # define XElf_Half Elf32_Half 31 # define XElf_Word Elf32_Word 32 # define XElf_Xword Elf32_Word 33 # define XElf_Sxword Elf32_Sword 34 # define XElf_Versym Elf32_Versym 35 # define XElf_Sym Elf32_Sym 36 # define XElf_Rel Elf32_Rel 37 # define XElf_Rela Elf32_Rela 38 39 # define XElf_Ehdr_vardef(name) Elf32_Ehdr *name 40 # define xelf_getehdr(elf, name) name = elf32_getehdr (elf) 41 # define xelf_getehdr_copy(elf, name, copy) \ 42 (copy) = *(name = elf32_getehdr (elf)) 43 # define xelf_newehdr(elf, klass) elf32_newehdr (elf) 44 # define xelf_update_ehdr(elf, ehdr) \ 45 /* nothing */ ((void) (elf), (void) (ehdr), 1) 46 47 # define xelf_getclass(elf) ELFCLASS32 48 49 # define XElf_Phdr_vardef(name) Elf32_Phdr *name 50 # define xelf_newphdr(elf, n) elf32_newphdr (elf, n) 51 # define xelf_getphdr(elf, idx, name) name = elf32_getphdr (elf) + idx 52 # define xelf_getphdr_ptr(elf, idx, name) name = elf32_getphdr (elf) + idx 53 # define xelf_update_phdr(elf, idx, phdr) \ 54 /* nothing */ ((void) (elf), (void) (idx), (void) (phdr), 1) 55 56 # define XElf_Shdr_vardef(name) Elf32_Shdr *name 57 # define xelf_getshdr(scn, name) name = elf32_getshdr (scn) 58 # define xelf_getshdr_copy(scn, name, copy) \ 59 (copy) = *(name = elf32_getshdr (scn)) 60 # define xelf_update_shdr(scn, shdr) \ 61 /* nothing */ ((void) (scn), (void) (shdr), 1) 62 63 # define XElf_Sym_vardef(name) Elf32_Sym *name 64 # define xelf_getsym(data, idx, name) \ 65 name = &((Elf32_Sym *) (data)->d_buf)[idx] 66 # define xelf_getsym_ptr(data, idx, name) \ 67 name = &((Elf32_Sym *) (data)->d_buf)[idx] 68 # define xelf_getsymshndx(data, ndxdata, idx, name1, name2) \ 69 (name1 = &((Elf32_Sym *) ((data)->d_buf))[idx]); \ 70 name2 = (unlikely ((ndxdata) != NULL) \ 71 ? ((Elf32_Word *) ((ndxdata)->d_buf))[idx] : 0) 72 # define xelf_update_sym(data, idx, sym) \ 73 /* nothing */ ((void) (data), (void) (idx), (void) (sym), 1) 74 # define xelf_update_symshndx(data, ndxdata, idx, name1, name2, datachanged) \ 75 if (datachanged) \ 76 ((Elf32_Sym *) ((data)->d_buf))[idx] = *name1; \ 77 if (unlikely (ndxdata != NULL)) \ 78 ((Elf32_Word *) ((ndxdata)->d_buf))[idx] = name2 79 80 # define XElf_Versym_vardef(name) Elf32_Versym name 81 # define xelf_getversym_copy(data, idx, name) \ 82 (name = ((Elf32_Versym *) ((data)->d_buf))[idx], &name) 83 84 # define XElf_Dyn_vardef(name) Elf32_Dyn *name 85 # define xelf_getdyn(data, idx, name) \ 86 name = &((Elf32_Dyn *) ((data)->d_buf))[idx] 87 # define xelf_getdyn_ptr(data, idx, name) \ 88 name = &((Elf32_Dyn *) ((data)->d_buf))[idx] 89 # define xelf_update_dyn(data, idx, name) \ 90 /* nothing */ ((void) (data), (void) (idx), (void) (name), 1) 91 92 # define XElf_Rel_vardef(name) Elf32_Rel *name 93 # define xelf_getrel(data, idx, name) \ 94 name = &((Elf32_Rel *) ((data)->d_buf))[idx] 95 # define xelf_getrel_ptr(data, idx, name) \ 96 name = &((Elf32_Rel *) ((data)->d_buf))[idx] 97 # define xelf_update_rel(data, idx, name) \ 98 /* nothing */ ((void) (data), (void) (idx), (void) (name), 1) 99 100 # define XElf_Rela_vardef(name) Elf32_Rela *name 101 # define xelf_getrela(data, idx, name) \ 102 name = &((Elf32_Rela *) ((data)->d_buf))[idx] 103 # define xelf_getrela_ptr(data, idx, name) \ 104 name = &((Elf32_Rela *) ((data)->d_buf))[idx] 105 # define xelf_update_rela(data, idx, name) \ 106 /* nothing */ ((void) (data), (void) (idx), (void) (name), 1) 107 108 # define XElf_Verdef_vardef(name) Elf32_Verdef *name 109 # define xelf_getverdef(data, offset, name) \ 110 name = ((Elf32_Verdef *) ((char *) ((data)->d_buf) + (offset))) 111 112 # define XElf_Verdaux_vardef(name) Elf32_Verdaux *name 113 # define xelf_getverdaux(data, offset, name) \ 114 name = ((Elf32_Verdaux *) ((char *) ((data)->d_buf) + (offset))) 115 116 # define XELF_ST_TYPE(info) ELF32_ST_TYPE (info) 117 # define XELF_ST_BIND(info) ELF32_ST_BIND (info) 118 # define XELF_ST_INFO(bind, type) ELF32_ST_INFO (bind, type) 119 # define XELF_ST_VISIBILITY(info) ELF32_ST_VISIBILITY (info) 120 121 # define XELF_R_SYM(info) ELF32_R_SYM (info) 122 # define XELF_R_TYPE(info) ELF32_R_TYPE (info) 123 # define XELF_R_INFO(sym, type) ELF32_R_INFO (sym, type) 124 125 # define xelf_fsize(elf, type, cnt) \ 126 (__builtin_constant_p (type) \ 127 ? ({ size_t fsize; \ 128 switch (type) \ 129 { \ 130 case ELF_T_BYTE: fsize = 1; break; \ 131 case ELF_T_ADDR: fsize = sizeof (Elf32_Addr); break; \ 132 case ELF_T_DYN: fsize = sizeof (Elf32_Dyn); break; \ 133 case ELF_T_EHDR: fsize = sizeof (Elf32_Ehdr); break; \ 134 case ELF_T_HALF: fsize = sizeof (Elf32_Half); break; \ 135 case ELF_T_OFF: fsize = sizeof (Elf32_Off); break; \ 136 case ELF_T_PHDR: fsize = sizeof (Elf32_Phdr); break; \ 137 case ELF_T_RELA: fsize = sizeof (Elf32_Rela); break; \ 138 case ELF_T_REL: fsize = sizeof (Elf32_Rel); break; \ 139 case ELF_T_SHDR: fsize = sizeof (Elf32_Shdr); break; \ 140 case ELF_T_SWORD: fsize = sizeof (Elf32_Sword); break; \ 141 case ELF_T_SYM: fsize = sizeof (Elf32_Sym); break; \ 142 case ELF_T_WORD: fsize = sizeof (Elf32_Word); break; \ 143 case ELF_T_XWORD: fsize = sizeof (Elf32_Xword); break; \ 144 case ELF_T_SXWORD: fsize = sizeof (Elf32_Sxword); break; \ 145 case ELF_T_VDEF: fsize = sizeof (Elf32_Verdef); break; \ 146 case ELF_T_VDAUX: fsize = sizeof (Elf32_Verdaux); break; \ 147 case ELF_T_VNEED: fsize = sizeof (Elf32_Verneed); break; \ 148 case ELF_T_VNAUX: fsize = sizeof (Elf32_Vernaux); break; \ 149 case ELF_T_NHDR: fsize = sizeof (Elf32_Nhdr); break; \ 150 case ELF_T_SYMINFO: fsize = sizeof (Elf32_Syminfo); break; \ 151 case ELF_T_MOVE: fsize = sizeof (Elf32_Move); break; \ 152 default: fsize = 0; break; \ 153 } \ 154 fsize * (cnt); }) \ 155 : gelf_fsize (elf, type, cnt, EV_CURRENT)) 156 #elif NATIVE_ELF == 64 157 /* 64-bit only. */ 158 # define XElf_Ehdr Elf64_Ehdr 159 # define XElf_Shdr Elf64_Shdr 160 # define XElf_Addr Elf64_Addr 161 # define XElf_Half Elf64_Half 162 # define XElf_Off Elf64_Off 163 # define XElf_Word Elf64_Word 164 # define XElf_Xword Elf64_Xword 165 # define XElf_Sxword Elf64_Sxword 166 # define XElf_Versym Elf64_Versym 167 # define XElf_Sym Elf64_Sym 168 # define XElf_Rel Elf64_Rel 169 # define XElf_Rela Elf64_Rela 170 171 # define XElf_Ehdr_vardef(name) Elf64_Ehdr *name 172 # define xelf_getehdr(elf, name) name = elf64_getehdr (elf) 173 # define xelf_getehdr_copy(elf, name, copy) \ 174 (copy) = *(name = elf64_getehdr (elf)) 175 # define xelf_newehdr(elf, klass) elf64_newehdr (elf) 176 # define xelf_update_ehdr(elf, ehdr) \ 177 /* nothing */ ((void) (elf), (void) (ehdr), 1) 178 179 # define xelf_getclass(elf) ELFCLASS32 180 181 # define XElf_Phdr_vardef(name) Elf64_Phdr *name 182 # define xelf_newphdr(elf, n) elf64_newphdr (elf, n) 183 # define xelf_getphdr(elf, idx, name) name = elf64_getphdr (elf) + idx 184 # define xelf_getphdr_ptr(elf, idx, name) name = elf64_getphdr (elf) + idx 185 # define xelf_update_phdr(elf, idx, phdr) \ 186 /* nothing */ ((void) (elf), (void) (idx), (void) (phdr), 1) 187 188 # define XElf_Shdr_vardef(name) Elf64_Shdr *name 189 # define xelf_getshdr(scn, name) name = elf64_getshdr (scn) 190 # define xelf_getshdr_copy(scn, name, copy) \ 191 (copy) = *(name = elf64_getshdr (scn)) 192 # define xelf_update_shdr(scn, shdr) \ 193 /* nothing */ ((void) (scn), (void) (shdr), 1) 194 195 # define XElf_Sym_vardef(name) Elf64_Sym *name 196 # define xelf_getsym(data, idx, name) \ 197 name = &((Elf64_Sym *) (data)->d_buf)[idx] 198 # define xelf_getsym_ptr(data, idx, name) \ 199 name = &((Elf64_Sym *) (data)->d_buf)[idx] 200 # define xelf_getsymshndx(data, ndxdata, idx, name1, name2) \ 201 (name1 = &((Elf64_Sym *) ((data)->d_buf))[idx]); \ 202 name2 = (unlikely ((ndxdata) != NULL) \ 203 ? ((Elf32_Word *) ((ndxdata)->d_buf))[idx] : 0) 204 # define xelf_update_sym(data, idx, sym) \ 205 /* nothing */ ((void) (data), (void) (idx), (void) (sym), 1) 206 # define xelf_update_symshndx(data, ndxdata, idx, name1, name2, datachanged) \ 207 if (datachanged) \ 208 ((Elf64_Sym *) ((data)->d_buf))[idx] = *name1; \ 209 if (ndxdata != NULL) \ 210 (((Elf32_Word *) ((ndxdata)->d_buf))[idx] = name2) 211 212 # define XElf_Versym_vardef(name) Elf64_Versym name 213 # define xelf_getversym_copy(data, idx, name) \ 214 (name = ((Elf64_Versym *) ((data)->d_buf))[idx], (&name)) 215 216 # define XElf_Dyn_vardef(name) Elf64_Dyn *name 217 # define xelf_getdyn(data, idx, name) \ 218 name = &((Elf64_Dyn *) ((data)->d_buf))[idx] 219 # define xelf_getdyn_ptr(data, idx, name) \ 220 name = &((Elf64_Dyn *) ((data)->d_buf))[idx] 221 # define xelf_update_dyn(data, idx, name) \ 222 /* nothing */ ((void) (data), (void) (idx), (void) (name), 1) 223 224 # define XElf_Rel_vardef(name) Elf64_Rel *name 225 # define xelf_getrel(data, idx, name) \ 226 name = &((Elf64_Rel *) ((data)->d_buf))[idx] 227 # define xelf_getrel_ptr(data, idx, name) \ 228 name = &((Elf64_Rel *) ((data)->d_buf))[idx] 229 # define xelf_update_rel(data, idx, name) \ 230 /* nothing */ ((void) (data), (void) (idx), (void) (name), 1) 231 232 # define XElf_Rela_vardef(name) Elf64_Rela *name 233 # define xelf_getrela(data, idx, name) \ 234 name = &((Elf64_Rela *) ((data)->d_buf))[idx] 235 # define xelf_getrela_ptr(data, idx, name) \ 236 name = &((Elf64_Rela *) ((data)->d_buf))[idx] 237 # define xelf_update_rela(data, idx, name) \ 238 /* nothing */ ((void) (data), (void) (idx), (void) (name), 1) 239 240 # define XElf_Verdef_vardef(name) Elf64_Verdef *name 241 # define xelf_getverdef(data, offset, name) \ 242 name = ((Elf64_Verdef *) ((char *) ((data)->d_buf) + (offset))) 243 244 # define XElf_Verdaux_vardef(name) Elf64_Verdaux *name 245 # define xelf_getverdaux(data, offset, name) \ 246 name = ((Elf64_Verdaux *) ((char *) ((data)->d_buf) + (offset))) 247 248 # define XELF_ST_TYPE(info) ELF64_ST_TYPE (info) 249 # define XELF_ST_BIND(info) ELF64_ST_BIND (info) 250 # define XELF_ST_INFO(bind, type) ELF64_ST_INFO (bind, type) 251 # define XELF_ST_VISIBILITY(info) ELF64_ST_VISIBILITY (info) 252 253 # define XELF_R_SYM(info) ELF64_R_SYM (info) 254 # define XELF_R_TYPE(info) ELF64_R_TYPE (info) 255 # define XELF_R_INFO(sym, type) ELF64_R_INFO (sym, type) 256 257 # define xelf_fsize(elf, type, cnt) \ 258 (__builtin_constant_p (type) \ 259 ? ({ size_t fsize; \ 260 switch (type) \ 261 { \ 262 case ELF_T_BYTE: fsize = 1; break; \ 263 case ELF_T_ADDR: fsize = sizeof (Elf64_Addr); break; \ 264 case ELF_T_DYN: fsize = sizeof (Elf64_Dyn); break; \ 265 case ELF_T_EHDR: fsize = sizeof (Elf64_Ehdr); break; \ 266 case ELF_T_HALF: fsize = sizeof (Elf64_Half); break; \ 267 case ELF_T_OFF: fsize = sizeof (Elf64_Off); break; \ 268 case ELF_T_PHDR: fsize = sizeof (Elf64_Phdr); break; \ 269 case ELF_T_RELA: fsize = sizeof (Elf64_Rela); break; \ 270 case ELF_T_REL: fsize = sizeof (Elf64_Rel); break; \ 271 case ELF_T_SHDR: fsize = sizeof (Elf64_Shdr); break; \ 272 case ELF_T_SWORD: fsize = sizeof (Elf64_Sword); break; \ 273 case ELF_T_SYM: fsize = sizeof (Elf64_Sym); break; \ 274 case ELF_T_WORD: fsize = sizeof (Elf64_Word); break; \ 275 case ELF_T_XWORD: fsize = sizeof (Elf64_Xword); break; \ 276 case ELF_T_SXWORD: fsize = sizeof (Elf64_Sxword); break; \ 277 case ELF_T_VDEF: fsize = sizeof (Elf64_Verdef); break; \ 278 case ELF_T_VDAUX: fsize = sizeof (Elf64_Verdaux); break; \ 279 case ELF_T_VNEED: fsize = sizeof (Elf64_Verneed); break; \ 280 case ELF_T_VNAUX: fsize = sizeof (Elf64_Vernaux); break; \ 281 case ELF_T_NHDR: fsize = sizeof (Elf64_Nhdr); break; \ 282 case ELF_T_SYMINFO: fsize = sizeof (Elf64_Syminfo); break; \ 283 case ELF_T_MOVE: fsize = sizeof (Elf64_Move); break; \ 284 default: fsize = 0; break; \ 285 } \ 286 fsize * (cnt); }) \ 287 : gelf_fsize (elf, type, cnt, EV_CURRENT)) 288 #else 289 # include <gelf.h> 290 291 /* Generic linker. */ 292 # define XElf_Ehdr GElf_Ehdr 293 # define XElf_Shdr GElf_Shdr 294 # define XElf_Addr GElf_Addr 295 # define XElf_Half GElf_Half 296 # define XElf_Off GElf_Off 297 # define XElf_Word GElf_Word 298 # define XElf_Xword GElf_Xword 299 # define XElf_Sxword GElf_Sxword 300 # define XElf_Versym GElf_Versym 301 # define XElf_Sym GElf_Sym 302 # define XElf_Rel GElf_Rel 303 # define XElf_Rela GElf_Rela 304 305 # define XElf_Ehdr_vardef(name) GElf_Ehdr name##_mem; GElf_Ehdr *name 306 # define xelf_getehdr(elf, name) name = gelf_getehdr (elf, &name##_mem) 307 # define xelf_getehdr_copy(elf, name, copy) \ 308 name = gelf_getehdr (elf, &(copy)) 309 # define xelf_newehdr(elf, klass) gelf_newehdr (elf, klass) 310 # define xelf_update_ehdr(elf, ehdr) gelf_update_ehdr (elf, ehdr) 311 312 # define xelf_getclass(elf) gelf_getclass (elf) 313 314 # define XElf_Phdr_vardef(name) GElf_Phdr name##_mem; GElf_Phdr *name 315 # define xelf_newphdr(elf, n) gelf_newphdr (elf, n) 316 # define xelf_getphdr(elf, idx, name) \ 317 name = gelf_getphdr (elf, idx, &name##_mem) 318 # define xelf_getphdr_ptr(elf, idx, name) \ 319 name = &name##_mem 320 # define xelf_update_phdr(elf, idx, phdr) \ 321 gelf_update_phdr (elf, idx, phdr) 322 323 # define XElf_Shdr_vardef(name) GElf_Shdr name##_mem; GElf_Shdr *name 324 # define xelf_getshdr(scn, name) name = gelf_getshdr (scn, &name##_mem) 325 # define xelf_getshdr_copy(scn, name, copy) \ 326 name = gelf_getshdr (scn, &(copy)) 327 # define xelf_update_shdr(scn, shdr) gelf_update_shdr (scn, shdr) 328 329 # define XElf_Sym_vardef(name) GElf_Sym name##_mem; GElf_Sym *name 330 # define xelf_getsym(data, idx, name) \ 331 name = gelf_getsym (data, idx, &name##_mem) 332 # define xelf_getsym_ptr(data, idx, name) \ 333 name = &name##_mem 334 # define xelf_getsymshndx(data, ndxdata, idx, name1, name2) \ 335 name1 = gelf_getsymshndx (data, ndxdata, idx, &name1##_mem, &(name2)) 336 # define xelf_update_sym(data, idx, sym) gelf_update_sym (data, idx, sym) 337 # define xelf_update_symshndx(data, ndxdata, idx, name1, name2, datachanged) \ 338 gelf_update_symshndx (data, ndxdata, idx, name1, name2) 339 340 # define XElf_Versym_vardef(name) GElf_Versym name 341 # define xelf_getversym_copy(data, idx, name) \ 342 gelf_getversym (data, idx, &name) 343 344 # define XElf_Dyn_vardef(name) GElf_Dyn name##_mem; GElf_Dyn *name 345 # define xelf_getdyn(data, idx, name) \ 346 name = gelf_getdyn (data, idx, &name##_mem) 347 # define xelf_getdyn_ptr(data, idx, name) \ 348 name = &name##_mem 349 # define xelf_update_dyn(data, idx, name) \ 350 gelf_update_dyn (data, idx, name) 351 352 # define XElf_Rel_vardef(name) GElf_Rel name##_mem; GElf_Rel *name 353 # define xelf_getrel(data, idx, name) \ 354 name = gelf_getrel (data, idx, &name##_mem) 355 # define xelf_getrel_ptr(data, idx, name) \ 356 name = &name##_mem 357 # define xelf_update_rel(data, idx, name) \ 358 gelf_update_rel (data, idx, name) 359 360 # define XElf_Rela_vardef(name) GElf_Rela name##_mem; GElf_Rela *name 361 # define xelf_getrela(data, idx, name) \ 362 name = gelf_getrela (data, idx, &name##_mem) 363 # define xelf_getrela_ptr(data, idx, name) \ 364 name = &name##_mem 365 # define xelf_update_rela(data, idx, name) \ 366 gelf_update_rela (data, idx, name) 367 368 # define XElf_Verdef_vardef(name) GElf_Verdef name##_mem; GElf_Verdef *name 369 # define xelf_getverdef(data, offset, name) \ 370 name = gelf_getverdef (data, offset, &name##_mem) 371 372 # define XElf_Verdaux_vardef(name) GElf_Verdaux name##_mem; GElf_Verdaux *name 373 # define xelf_getverdaux(data, offset, name) \ 374 name = gelf_getverdaux (data, offset, &name##_mem) 375 376 # define XELF_ST_TYPE(info) GELF_ST_TYPE (info) 377 # define XELF_ST_BIND(info) GELF_ST_BIND (info) 378 # define XELF_ST_INFO(bind, type) GELF_ST_INFO (bind, type) 379 # define XELF_ST_VISIBILITY(info) GELF_ST_VISIBILITY (info) 380 381 # define XELF_R_SYM(info) GELF_R_SYM (info) 382 # define XELF_R_TYPE(info) GELF_R_TYPE (info) 383 # define XELF_R_INFO(sym, type) GELF_R_INFO (sym, type) 384 385 # define xelf_fsize(elf, type, cnt) \ 386 gelf_fsize (elf, type, cnt, EV_CURRENT) 387 #endif 388
