1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2003 David O'Brien. All rights reserved. 5 * Copyright (c) 2001 Jake Burkholder 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/types.h> 31 32 #include <sys/capsicum.h> 33 #include <sys/elf32.h> 34 #include <sys/elf64.h> 35 #include <sys/endian.h> 36 #include <sys/mman.h> 37 #include <sys/stat.h> 38 #include <capsicum_helpers.h> 39 #include <err.h> 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <inttypes.h> 43 #include <stddef.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 49 #define ED_DYN (1<<0) 50 #define ED_EHDR (1<<1) 51 #define ED_GOT (1<<2) 52 #define ED_HASH (1<<3) 53 #define ED_INTERP (1<<4) 54 #define ED_NOTE (1<<5) 55 #define ED_PHDR (1<<6) 56 #define ED_REL (1<<7) 57 #define ED_SHDR (1<<8) 58 #define ED_SYMTAB (1<<9) 59 #define ED_ALL ((1<<10)-1) 60 #define ED_IS_ELF (1<<10) /* Exclusive with other flags */ 61 62 #define elf_get_addr elf_get_quad 63 #define elf_get_off elf_get_quad 64 #define elf_get_size elf_get_quad 65 66 enum elf_member { 67 D_TAG = 1, D_PTR, D_VAL, 68 69 E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY, 70 E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE, 71 E_SHNUM, E_SHSTRNDX, 72 73 N_NAMESZ, N_DESCSZ, N_TYPE, 74 75 P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS, 76 P_ALIGN, 77 78 SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK, 79 SH_INFO, SH_ADDRALIGN, SH_ENTSIZE, 80 81 ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX, 82 83 R_OFFSET, R_INFO, 84 85 RA_OFFSET, RA_INFO, RA_ADDEND 86 }; 87 88 typedef enum elf_member elf_member_t; 89 90 static int elf32_offsets[] = { 91 0, 92 93 offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr), 94 offsetof(Elf32_Dyn, d_un.d_val), 95 96 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]), 97 offsetof(Elf32_Ehdr, e_ident[EI_DATA]), 98 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]), 99 offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine), 100 offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry), 101 offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff), 102 offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize), 103 offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum), 104 offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum), 105 offsetof(Elf32_Ehdr, e_shstrndx), 106 107 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz), 108 offsetof(Elf_Note, n_type), 109 110 offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset), 111 offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr), 112 offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz), 113 offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align), 114 115 offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type), 116 offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr), 117 offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size), 118 offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info), 119 offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize), 120 121 offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value), 122 offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info), 123 offsetof(Elf32_Sym, st_shndx), 124 125 offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info), 126 127 offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info), 128 offsetof(Elf32_Rela, r_addend) 129 }; 130 131 static int elf64_offsets[] = { 132 0, 133 134 offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr), 135 offsetof(Elf64_Dyn, d_un.d_val), 136 137 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]), 138 offsetof(Elf32_Ehdr, e_ident[EI_DATA]), 139 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]), 140 offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine), 141 offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry), 142 offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff), 143 offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize), 144 offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum), 145 offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum), 146 offsetof(Elf64_Ehdr, e_shstrndx), 147 148 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz), 149 offsetof(Elf_Note, n_type), 150 151 offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset), 152 offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr), 153 offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz), 154 offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align), 155 156 offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type), 157 offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr), 158 offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size), 159 offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info), 160 offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize), 161 162 offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value), 163 offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info), 164 offsetof(Elf64_Sym, st_shndx), 165 166 offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info), 167 168 offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info), 169 offsetof(Elf64_Rela, r_addend) 170 }; 171 172 /* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */ 173 static const char * 174 d_tags(u_int64_t tag) 175 { 176 static char unknown_tag[48]; 177 178 switch (tag) { 179 case DT_NULL: return "DT_NULL"; 180 case DT_NEEDED: return "DT_NEEDED"; 181 case DT_PLTRELSZ: return "DT_PLTRELSZ"; 182 case DT_PLTGOT: return "DT_PLTGOT"; 183 case DT_HASH: return "DT_HASH"; 184 case DT_STRTAB: return "DT_STRTAB"; 185 case DT_SYMTAB: return "DT_SYMTAB"; 186 case DT_RELA: return "DT_RELA"; 187 case DT_RELASZ: return "DT_RELASZ"; 188 case DT_RELAENT: return "DT_RELAENT"; 189 case DT_STRSZ: return "DT_STRSZ"; 190 case DT_SYMENT: return "DT_SYMENT"; 191 case DT_INIT: return "DT_INIT"; 192 case DT_FINI: return "DT_FINI"; 193 case DT_SONAME: return "DT_SONAME"; 194 case DT_RPATH: return "DT_RPATH"; 195 case DT_SYMBOLIC: return "DT_SYMBOLIC"; 196 case DT_REL: return "DT_REL"; 197 case DT_RELSZ: return "DT_RELSZ"; 198 case DT_RELENT: return "DT_RELENT"; 199 case DT_PLTREL: return "DT_PLTREL"; 200 case DT_DEBUG: return "DT_DEBUG"; 201 case DT_TEXTREL: return "DT_TEXTREL"; 202 case DT_JMPREL: return "DT_JMPREL"; 203 case DT_BIND_NOW: return "DT_BIND_NOW"; 204 case DT_INIT_ARRAY: return "DT_INIT_ARRAY"; 205 case DT_FINI_ARRAY: return "DT_FINI_ARRAY"; 206 case DT_INIT_ARRAYSZ: return "DT_INIT_ARRAYSZ"; 207 case DT_FINI_ARRAYSZ: return "DT_FINI_ARRAYSZ"; 208 case DT_RUNPATH: return "DT_RUNPATH"; 209 case DT_FLAGS: return "DT_FLAGS"; 210 case DT_PREINIT_ARRAY: return "DT_PREINIT_ARRAY"; /* XXX DT_ENCODING */ 211 case DT_PREINIT_ARRAYSZ:return "DT_PREINIT_ARRAYSZ"; 212 /* 0x6000000D - 0x6ffff000 operating system-specific semantics */ 213 case 0x6ffffdf5: return "DT_GNU_PRELINKED"; 214 case 0x6ffffdf6: return "DT_GNU_CONFLICTSZ"; 215 case 0x6ffffdf7: return "DT_GNU_LIBLISTSZ"; 216 case 0x6ffffdf8: return "DT_SUNW_CHECKSUM"; 217 case DT_PLTPADSZ: return "DT_PLTPADSZ"; 218 case DT_MOVEENT: return "DT_MOVEENT"; 219 case DT_MOVESZ: return "DT_MOVESZ"; 220 case DT_FEATURE: return "DT_FEATURE"; 221 case DT_POSFLAG_1: return "DT_POSFLAG_1"; 222 case DT_SYMINSZ: return "DT_SYMINSZ"; 223 case DT_SYMINENT : return "DT_SYMINENT (DT_VALRNGHI)"; 224 case DT_ADDRRNGLO: return "DT_ADDRRNGLO"; 225 case DT_GNU_HASH: return "DT_GNU_HASH"; 226 case 0x6ffffef8: return "DT_GNU_CONFLICT"; 227 case 0x6ffffef9: return "DT_GNU_LIBLIST"; 228 case DT_CONFIG: return "DT_CONFIG"; 229 case DT_DEPAUDIT: return "DT_DEPAUDIT"; 230 case DT_AUDIT: return "DT_AUDIT"; 231 case DT_PLTPAD: return "DT_PLTPAD"; 232 case DT_MOVETAB: return "DT_MOVETAB"; 233 case DT_SYMINFO : return "DT_SYMINFO (DT_ADDRRNGHI)"; 234 case DT_RELACOUNT: return "DT_RELACOUNT"; 235 case DT_RELCOUNT: return "DT_RELCOUNT"; 236 case DT_FLAGS_1: return "DT_FLAGS_1"; 237 case DT_VERDEF: return "DT_VERDEF"; 238 case DT_VERDEFNUM: return "DT_VERDEFNUM"; 239 case DT_VERNEED: return "DT_VERNEED"; 240 case DT_VERNEEDNUM: return "DT_VERNEEDNUM"; 241 case 0x6ffffff0: return "DT_GNU_VERSYM"; 242 /* 0x70000000 - 0x7fffffff processor-specific semantics */ 243 case 0x70000000: return "DT_IA_64_PLT_RESERVE"; 244 case DT_AUXILIARY: return "DT_AUXILIARY"; 245 case DT_USED: return "DT_USED"; 246 case DT_FILTER: return "DT_FILTER"; 247 } 248 snprintf(unknown_tag, sizeof(unknown_tag), 249 "ERROR: TAG NOT DEFINED -- tag 0x%jx", (uintmax_t)tag); 250 return (unknown_tag); 251 } 252 253 static const char * 254 e_machines(u_int mach) 255 { 256 static char machdesc[64]; 257 258 switch (mach) { 259 case EM_NONE: return "EM_NONE"; 260 case EM_M32: return "EM_M32"; 261 case EM_SPARC: return "EM_SPARC"; 262 case EM_386: return "EM_386"; 263 case EM_68K: return "EM_68K"; 264 case EM_88K: return "EM_88K"; 265 case EM_IAMCU: return "EM_IAMCU"; 266 case EM_860: return "EM_860"; 267 case EM_MIPS: return "EM_MIPS"; 268 case EM_PPC: return "EM_PPC"; 269 case EM_PPC64: return "EM_PPC64"; 270 case EM_ARM: return "EM_ARM"; 271 case EM_ALPHA: return "EM_ALPHA (legacy)"; 272 case EM_SPARCV9:return "EM_SPARCV9"; 273 case EM_IA_64: return "EM_IA_64"; 274 case EM_X86_64: return "EM_X86_64"; 275 case EM_AARCH64:return "EM_AARCH64"; 276 case EM_RISCV: return "EM_RISCV"; 277 } 278 snprintf(machdesc, sizeof(machdesc), 279 "(unknown machine) -- type 0x%x", mach); 280 return (machdesc); 281 } 282 283 static const char *e_types[] = { 284 "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE" 285 }; 286 287 static const char *ei_versions[] = { 288 "EV_NONE", "EV_CURRENT" 289 }; 290 291 static const char *ei_classes[] = { 292 "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64" 293 }; 294 295 static const char *ei_data[] = { 296 "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB" 297 }; 298 299 static const char *ei_abis[256] = { 300 "ELFOSABI_NONE", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX", 301 "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX", 302 "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64", 303 "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD", 304 [255] = "ELFOSABI_STANDALONE" 305 }; 306 307 static const char *p_types[] = { 308 "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE", 309 "PT_SHLIB", "PT_PHDR", "PT_TLS" 310 }; 311 312 static const char *p_flags[] = { 313 "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R", 314 "PF_X|PF_W|PF_R" 315 }; 316 317 #define NT_ELEM(x) [x] = #x, 318 static const char *nt_types[] = { 319 "", 320 NT_ELEM(NT_FREEBSD_ABI_TAG) 321 NT_ELEM(NT_FREEBSD_NOINIT_TAG) 322 NT_ELEM(NT_FREEBSD_ARCH_TAG) 323 NT_ELEM(NT_FREEBSD_FEATURE_CTL) 324 }; 325 326 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */ 327 static const char * 328 sh_types(uint64_t machine, uint64_t sht) { 329 static char unknown_buf[64]; 330 331 if (sht < 0x60000000) { 332 switch (sht) { 333 case SHT_NULL: return "SHT_NULL"; 334 case SHT_PROGBITS: return "SHT_PROGBITS"; 335 case SHT_SYMTAB: return "SHT_SYMTAB"; 336 case SHT_STRTAB: return "SHT_STRTAB"; 337 case SHT_RELA: return "SHT_RELA"; 338 case SHT_HASH: return "SHT_HASH"; 339 case SHT_DYNAMIC: return "SHT_DYNAMIC"; 340 case SHT_NOTE: return "SHT_NOTE"; 341 case SHT_NOBITS: return "SHT_NOBITS"; 342 case SHT_REL: return "SHT_REL"; 343 case SHT_SHLIB: return "SHT_SHLIB"; 344 case SHT_DYNSYM: return "SHT_DYNSYM"; 345 case SHT_INIT_ARRAY: return "SHT_INIT_ARRAY"; 346 case SHT_FINI_ARRAY: return "SHT_FINI_ARRAY"; 347 case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY"; 348 case SHT_GROUP: return "SHT_GROUP"; 349 case SHT_SYMTAB_SHNDX: return "SHT_SYMTAB_SHNDX"; 350 } 351 snprintf(unknown_buf, sizeof(unknown_buf), 352 "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht); 353 return (unknown_buf); 354 } else if (sht < 0x70000000) { 355 /* 0x60000000-0x6fffffff operating system-specific semantics */ 356 switch (sht) { 357 case 0x6ffffff0: return "XXX:VERSYM"; 358 case SHT_SUNW_dof: return "SHT_SUNW_dof"; 359 case SHT_GNU_HASH: return "SHT_GNU_HASH"; 360 case 0x6ffffff7: return "SHT_GNU_LIBLIST"; 361 case 0x6ffffffc: return "XXX:VERDEF"; 362 case SHT_SUNW_verdef: return "SHT_SUNW(GNU)_verdef"; 363 case SHT_SUNW_verneed: return "SHT_SUNW(GNU)_verneed"; 364 case SHT_SUNW_versym: return "SHT_SUNW(GNU)_versym"; 365 } 366 snprintf(unknown_buf, sizeof(unknown_buf), 367 "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED", 368 (uintmax_t)sht); 369 return (unknown_buf); 370 } else if (sht < 0x80000000) { 371 /* 0x70000000-0x7fffffff processor-specific semantics */ 372 switch (machine) { 373 case EM_ARM: 374 switch (sht) { 375 case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX"; 376 case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP"; 377 case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES"; 378 case SHT_ARM_DEBUGOVERLAY: 379 return "SHT_ARM_DEBUGOVERLAY"; 380 case SHT_ARM_OVERLAYSECTION: 381 return "SHT_ARM_OVERLAYSECTION"; 382 } 383 break; 384 case EM_IA_64: 385 switch (sht) { 386 case 0x70000000: return "SHT_IA_64_EXT"; 387 case 0x70000001: return "SHT_IA_64_UNWIND"; 388 } 389 break; 390 case EM_MIPS: 391 switch (sht) { 392 case SHT_MIPS_REGINFO: return "SHT_MIPS_REGINFO"; 393 case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS"; 394 case SHT_MIPS_ABIFLAGS: return "SHT_MIPS_ABIFLAGS"; 395 } 396 break; 397 } 398 switch (sht) { 399 case 0x7ffffffd: return "XXX:AUXILIARY"; 400 case 0x7fffffff: return "XXX:FILTER"; 401 } 402 snprintf(unknown_buf, sizeof(unknown_buf), 403 "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED", 404 (uintmax_t)sht); 405 return (unknown_buf); 406 } else { 407 /* 0x80000000-0xffffffff application programs */ 408 snprintf(unknown_buf, sizeof(unknown_buf), 409 "ERROR: SHT 0x%jx NOT DEFINED", 410 (uintmax_t)sht); 411 return (unknown_buf); 412 } 413 } 414 415 static const char *sh_flags[] = { 416 "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR", 417 "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR", 418 "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR" 419 }; 420 421 static const char * 422 st_type(unsigned int mach, unsigned int type) 423 { 424 static char s_type[32]; 425 426 switch (type) { 427 case STT_NOTYPE: return "STT_NOTYPE"; 428 case STT_OBJECT: return "STT_OBJECT"; 429 case STT_FUNC: return "STT_FUNC"; 430 case STT_SECTION: return "STT_SECTION"; 431 case STT_FILE: return "STT_FILE"; 432 case STT_COMMON: return "STT_COMMON"; 433 case STT_TLS: return "STT_TLS"; 434 case 13: 435 if (mach == EM_SPARCV9) 436 return "STT_SPARC_REGISTER"; 437 break; 438 } 439 snprintf(s_type, sizeof(s_type), "<unknown: %#x>", type); 440 return (s_type); 441 } 442 443 static const char *st_bindings[] = { 444 "STB_LOCAL", "STB_GLOBAL", "STB_WEAK" 445 }; 446 447 static char *dynstr; 448 static char *shstrtab; 449 static char *strtab; 450 static FILE *out; 451 452 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member); 453 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base, 454 elf_member_t member); 455 #if 0 456 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member); 457 #endif 458 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member); 459 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member); 460 461 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh); 462 static void elf_print_phdr(Elf32_Ehdr *e, void *p); 463 static void elf_print_shdr(Elf32_Ehdr *e, void *sh); 464 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str); 465 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh); 466 static void elf_print_rel(Elf32_Ehdr *e, void *r); 467 static void elf_print_rela(Elf32_Ehdr *e, void *ra); 468 static void elf_print_interp(Elf32_Ehdr *e, void *p); 469 static void elf_print_got(Elf32_Ehdr *e, void *sh); 470 static void elf_print_hash(Elf32_Ehdr *e, void *sh); 471 static void elf_print_note(Elf32_Ehdr *e, void *sh); 472 473 static void usage(void) __dead2; 474 475 /* 476 * Helpers for ELF files with shnum or shstrndx values that don't fit in the 477 * ELF header. If the values are too large then an escape value is used to 478 * indicate that the actual value is found in one of section 0's fields. 479 */ 480 static uint64_t 481 elf_get_shnum(Elf32_Ehdr *e, void *sh) 482 { 483 uint64_t shnum; 484 485 shnum = elf_get_quarter(e, e, E_SHNUM); 486 if (shnum == 0) 487 shnum = elf_get_word(e, (char *)sh, SH_SIZE); 488 return shnum; 489 } 490 491 static uint64_t 492 elf_get_shstrndx(Elf32_Ehdr *e, void *sh) 493 { 494 uint64_t shstrndx; 495 496 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX); 497 if (shstrndx == SHN_XINDEX) 498 shstrndx = elf_get_word(e, (char *)sh, SH_LINK); 499 return shstrndx; 500 } 501 502 int 503 main(int ac, char **av) 504 { 505 cap_rights_t rights; 506 u_int64_t phoff; 507 u_int64_t shoff; 508 u_int64_t phentsize; 509 u_int64_t phnum; 510 u_int64_t shentsize; 511 u_int64_t shnum; 512 u_int64_t shstrndx; 513 u_int64_t offset; 514 u_int64_t name; 515 u_int64_t type; 516 struct stat sb; 517 u_int flags; 518 Elf32_Ehdr *e; 519 void *p; 520 void *sh; 521 void *v; 522 int fd; 523 int ch; 524 int i; 525 526 out = stdout; 527 flags = 0; 528 while ((ch = getopt(ac, av, "acdEeiGhnprsw:")) != -1) 529 switch (ch) { 530 case 'a': 531 flags = ED_ALL; 532 break; 533 case 'c': 534 flags |= ED_SHDR; 535 break; 536 case 'd': 537 flags |= ED_DYN; 538 break; 539 case 'E': 540 flags = ED_IS_ELF; 541 break; 542 case 'e': 543 flags |= ED_EHDR; 544 break; 545 case 'i': 546 flags |= ED_INTERP; 547 break; 548 case 'G': 549 flags |= ED_GOT; 550 break; 551 case 'h': 552 flags |= ED_HASH; 553 break; 554 case 'n': 555 flags |= ED_NOTE; 556 break; 557 case 'p': 558 flags |= ED_PHDR; 559 break; 560 case 'r': 561 flags |= ED_REL; 562 break; 563 case 's': 564 flags |= ED_SYMTAB; 565 break; 566 case 'w': 567 if ((out = fopen(optarg, "w")) == NULL) 568 err(1, "%s", optarg); 569 cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE); 570 if (caph_rights_limit(fileno(out), &rights) < 0) 571 err(1, "unable to limit rights for %s", optarg); 572 break; 573 case '?': 574 default: 575 usage(); 576 } 577 ac -= optind; 578 av += optind; 579 if (ac == 0 || flags == 0 || ((flags & ED_IS_ELF) && 580 (ac != 1 || (flags & ~ED_IS_ELF) || out != stdout))) 581 usage(); 582 if ((fd = open(*av, O_RDONLY)) < 0 || 583 fstat(fd, &sb) < 0) 584 err(1, "%s", *av); 585 if ((size_t)sb.st_size < sizeof(Elf32_Ehdr)) { 586 if (flags & ED_IS_ELF) 587 exit(1); 588 errx(1, "not an elf file"); 589 } 590 cap_rights_init(&rights, CAP_MMAP_R); 591 if (caph_rights_limit(fd, &rights) < 0) 592 err(1, "unable to limit rights for %s", *av); 593 cap_rights_init(&rights); 594 if (caph_rights_limit(STDIN_FILENO, &rights) < 0 || 595 caph_limit_stdout() < 0 || caph_limit_stderr() < 0) { 596 err(1, "unable to limit rights for stdio"); 597 } 598 if (caph_enter() < 0) 599 err(1, "unable to enter capability mode"); 600 e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0); 601 if (e == MAP_FAILED) 602 err(1, NULL); 603 if (!IS_ELF(*e)) { 604 if (flags & ED_IS_ELF) 605 exit(1); 606 errx(1, "not an elf file"); 607 } else if (flags & ED_IS_ELF) 608 exit (0); 609 phoff = elf_get_off(e, e, E_PHOFF); 610 shoff = elf_get_off(e, e, E_SHOFF); 611 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 612 phnum = elf_get_quarter(e, e, E_PHNUM); 613 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 614 p = (char *)e + phoff; 615 if (shoff > 0) { 616 sh = (char *)e + shoff; 617 shnum = elf_get_shnum(e, sh); 618 shstrndx = elf_get_shstrndx(e, sh); 619 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize, 620 SH_OFFSET); 621 shstrtab = (char *)e + offset; 622 } else { 623 sh = NULL; 624 shnum = 0; 625 shstrndx = 0; 626 shstrtab = NULL; 627 } 628 for (i = 0; (u_int64_t)i < shnum; i++) { 629 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME); 630 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET); 631 if (strcmp(shstrtab + name, ".strtab") == 0) 632 strtab = (char *)e + offset; 633 if (strcmp(shstrtab + name, ".dynstr") == 0) 634 dynstr = (char *)e + offset; 635 } 636 if (flags & ED_EHDR) 637 elf_print_ehdr(e, sh); 638 if (flags & ED_PHDR) 639 elf_print_phdr(e, p); 640 if (flags & ED_SHDR) 641 elf_print_shdr(e, sh); 642 for (i = 0; (u_int64_t)i < phnum; i++) { 643 v = (char *)p + i * phentsize; 644 type = elf_get_word(e, v, P_TYPE); 645 switch (type) { 646 case PT_INTERP: 647 if (flags & ED_INTERP) 648 elf_print_interp(e, v); 649 break; 650 case PT_NULL: 651 case PT_LOAD: 652 case PT_DYNAMIC: 653 case PT_NOTE: 654 case PT_SHLIB: 655 case PT_PHDR: 656 break; 657 } 658 } 659 for (i = 0; (u_int64_t)i < shnum; i++) { 660 v = (char *)sh + i * shentsize; 661 type = elf_get_word(e, v, SH_TYPE); 662 switch (type) { 663 case SHT_SYMTAB: 664 if (flags & ED_SYMTAB) 665 elf_print_symtab(e, v, strtab); 666 break; 667 case SHT_DYNAMIC: 668 if (flags & ED_DYN) 669 elf_print_dynamic(e, v); 670 break; 671 case SHT_RELA: 672 if (flags & ED_REL) 673 elf_print_rela(e, v); 674 break; 675 case SHT_REL: 676 if (flags & ED_REL) 677 elf_print_rel(e, v); 678 break; 679 case SHT_NOTE: 680 name = elf_get_word(e, v, SH_NAME); 681 if (flags & ED_NOTE && 682 strcmp(shstrtab + name, ".note.tag") == 0) 683 elf_print_note(e, v); 684 break; 685 case SHT_DYNSYM: 686 if (flags & ED_SYMTAB) 687 elf_print_symtab(e, v, dynstr); 688 break; 689 case SHT_PROGBITS: 690 name = elf_get_word(e, v, SH_NAME); 691 if (flags & ED_GOT && 692 strcmp(shstrtab + name, ".got") == 0) 693 elf_print_got(e, v); 694 break; 695 case SHT_HASH: 696 if (flags & ED_HASH) 697 elf_print_hash(e, v); 698 break; 699 case SHT_NULL: 700 case SHT_STRTAB: 701 case SHT_NOBITS: 702 case SHT_SHLIB: 703 break; 704 } 705 } 706 707 return 0; 708 } 709 710 static void 711 elf_print_ehdr(Elf32_Ehdr *e, void *sh) 712 { 713 u_int64_t class; 714 u_int64_t data; 715 u_int64_t osabi; 716 u_int64_t type; 717 u_int64_t machine; 718 u_int64_t version; 719 u_int64_t entry; 720 u_int64_t phoff; 721 u_int64_t shoff; 722 u_int64_t flags; 723 u_int64_t ehsize; 724 u_int64_t phentsize; 725 u_int64_t phnum; 726 u_int64_t shentsize; 727 u_int64_t shnum; 728 u_int64_t shstrndx; 729 730 class = elf_get_byte(e, e, E_CLASS); 731 data = elf_get_byte(e, e, E_DATA); 732 osabi = elf_get_byte(e, e, E_OSABI); 733 type = elf_get_quarter(e, e, E_TYPE); 734 machine = elf_get_quarter(e, e, E_MACHINE); 735 version = elf_get_word(e, e, E_VERSION); 736 entry = elf_get_addr(e, e, E_ENTRY); 737 phoff = elf_get_off(e, e, E_PHOFF); 738 shoff = elf_get_off(e, e, E_SHOFF); 739 flags = elf_get_word(e, e, E_FLAGS); 740 ehsize = elf_get_quarter(e, e, E_EHSIZE); 741 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 742 phnum = elf_get_quarter(e, e, E_PHNUM); 743 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 744 fprintf(out, "\nelf header:\n"); 745 fprintf(out, "\n"); 746 fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data], 747 ei_abis[osabi]); 748 fprintf(out, "\te_type: %s\n", e_types[type]); 749 fprintf(out, "\te_machine: %s\n", e_machines(machine)); 750 fprintf(out, "\te_version: %s\n", ei_versions[version]); 751 fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry); 752 fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff); 753 fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff); 754 fprintf(out, "\te_flags: %jd\n", (intmax_t)flags); 755 fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize); 756 fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize); 757 fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum); 758 fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize); 759 if (sh != NULL) { 760 shnum = elf_get_shnum(e, sh); 761 shstrndx = elf_get_shstrndx(e, sh); 762 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum); 763 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx); 764 } 765 } 766 767 static void 768 elf_print_phdr(Elf32_Ehdr *e, void *p) 769 { 770 u_int64_t phentsize; 771 u_int64_t phnum; 772 u_int64_t type; 773 u_int64_t offset; 774 u_int64_t vaddr; 775 u_int64_t paddr; 776 u_int64_t filesz; 777 u_int64_t memsz; 778 u_int64_t flags; 779 u_int64_t align; 780 void *v; 781 int i; 782 783 phentsize = elf_get_quarter(e, e, E_PHENTSIZE); 784 phnum = elf_get_quarter(e, e, E_PHNUM); 785 fprintf(out, "\nprogram header:\n"); 786 for (i = 0; (u_int64_t)i < phnum; i++) { 787 v = (char *)p + i * phentsize; 788 type = elf_get_word(e, v, P_TYPE); 789 offset = elf_get_off(e, v, P_OFFSET); 790 vaddr = elf_get_addr(e, v, P_VADDR); 791 paddr = elf_get_addr(e, v, P_PADDR); 792 filesz = elf_get_size(e, v, P_FILESZ); 793 memsz = elf_get_size(e, v, P_MEMSZ); 794 flags = elf_get_word(e, v, P_FLAGS); 795 align = elf_get_size(e, v, P_ALIGN); 796 fprintf(out, "\n"); 797 fprintf(out, "entry: %d\n", i); 798 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]); 799 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset); 800 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr); 801 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr); 802 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz); 803 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz); 804 fprintf(out, "\tp_flags: %s\n", p_flags[flags]); 805 fprintf(out, "\tp_align: %jd\n", (intmax_t)align); 806 } 807 } 808 809 static void 810 elf_print_shdr(Elf32_Ehdr *e, void *sh) 811 { 812 u_int64_t shentsize; 813 u_int64_t shnum; 814 u_int64_t name; 815 u_int64_t type; 816 u_int64_t flags; 817 u_int64_t addr; 818 u_int64_t offset; 819 u_int64_t size; 820 u_int64_t shlink; 821 u_int64_t info; 822 u_int64_t addralign; 823 u_int64_t entsize; 824 u_int64_t machine; 825 void *v; 826 int i; 827 828 if (sh == NULL) { 829 fprintf(out, "\nNo section headers\n"); 830 return; 831 } 832 833 machine = elf_get_quarter(e, e, E_MACHINE); 834 shentsize = elf_get_quarter(e, e, E_SHENTSIZE); 835 shnum = elf_get_shnum(e, sh); 836 fprintf(out, "\nsection header:\n"); 837 for (i = 0; (u_int64_t)i < shnum; i++) { 838 v = (char *)sh + i * shentsize; 839 name = elf_get_word(e, v, SH_NAME); 840 type = elf_get_word(e, v, SH_TYPE); 841 flags = elf_get_word(e, v, SH_FLAGS); 842 addr = elf_get_addr(e, v, SH_ADDR); 843 offset = elf_get_off(e, v, SH_OFFSET); 844 size = elf_get_size(e, v, SH_SIZE); 845 shlink = elf_get_word(e, v, SH_LINK); 846 info = elf_get_word(e, v, SH_INFO); 847 addralign = elf_get_size(e, v, SH_ADDRALIGN); 848 entsize = elf_get_size(e, v, SH_ENTSIZE); 849 fprintf(out, "\n"); 850 fprintf(out, "entry: %d\n", i); 851 fprintf(out, "\tsh_name: %s\n", shstrtab + name); 852 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type)); 853 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]); 854 fprintf(out, "\tsh_addr: %#jx\n", addr); 855 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset); 856 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size); 857 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink); 858 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info); 859 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign); 860 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize); 861 } 862 } 863 864 static void 865 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str) 866 { 867 u_int64_t machine; 868 u_int64_t offset; 869 u_int64_t entsize; 870 u_int64_t size; 871 u_int64_t name; 872 u_int64_t value; 873 u_int64_t info; 874 u_int64_t shndx; 875 void *st; 876 int len; 877 int i; 878 879 machine = elf_get_quarter(e, e, E_MACHINE); 880 offset = elf_get_off(e, sh, SH_OFFSET); 881 entsize = elf_get_size(e, sh, SH_ENTSIZE); 882 size = elf_get_size(e, sh, SH_SIZE); 883 name = elf_get_word(e, sh, SH_NAME); 884 len = size / entsize; 885 fprintf(out, "\nsymbol table (%s):\n", shstrtab + name); 886 for (i = 0; i < len; i++) { 887 st = (char *)e + offset + i * entsize; 888 name = elf_get_word(e, st, ST_NAME); 889 value = elf_get_addr(e, st, ST_VALUE); 890 size = elf_get_size(e, st, ST_SIZE); 891 info = elf_get_byte(e, st, ST_INFO); 892 shndx = elf_get_quarter(e, st, ST_SHNDX); 893 fprintf(out, "\n"); 894 fprintf(out, "entry: %d\n", i); 895 fprintf(out, "\tst_name: %s\n", str + name); 896 fprintf(out, "\tst_value: %#jx\n", value); 897 fprintf(out, "\tst_size: %jd\n", (intmax_t)size); 898 fprintf(out, "\tst_info: %s %s\n", 899 st_type(machine, ELF32_ST_TYPE(info)), 900 st_bindings[ELF32_ST_BIND(info)]); 901 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx); 902 } 903 } 904 905 static void 906 elf_print_dynamic(Elf32_Ehdr *e, void *sh) 907 { 908 u_int64_t offset; 909 u_int64_t entsize; 910 u_int64_t size; 911 int64_t tag; 912 u_int64_t ptr; 913 u_int64_t val; 914 void *d; 915 int i; 916 917 offset = elf_get_off(e, sh, SH_OFFSET); 918 entsize = elf_get_size(e, sh, SH_ENTSIZE); 919 size = elf_get_size(e, sh, SH_SIZE); 920 fprintf(out, "\ndynamic:\n"); 921 for (i = 0; (u_int64_t)i < size / entsize; i++) { 922 d = (char *)e + offset + i * entsize; 923 tag = elf_get_size(e, d, D_TAG); 924 ptr = elf_get_size(e, d, D_PTR); 925 val = elf_get_addr(e, d, D_VAL); 926 fprintf(out, "\n"); 927 fprintf(out, "entry: %d\n", i); 928 fprintf(out, "\td_tag: %s\n", d_tags(tag)); 929 switch (tag) { 930 case DT_NEEDED: 931 case DT_SONAME: 932 case DT_RPATH: 933 fprintf(out, "\td_val: %s\n", dynstr + val); 934 break; 935 case DT_PLTRELSZ: 936 case DT_RELA: 937 case DT_RELASZ: 938 case DT_RELAENT: 939 case DT_STRSZ: 940 case DT_SYMENT: 941 case DT_RELSZ: 942 case DT_RELENT: 943 case DT_PLTREL: 944 fprintf(out, "\td_val: %jd\n", (intmax_t)val); 945 break; 946 case DT_PLTGOT: 947 case DT_HASH: 948 case DT_STRTAB: 949 case DT_SYMTAB: 950 case DT_INIT: 951 case DT_FINI: 952 case DT_REL: 953 case DT_JMPREL: 954 fprintf(out, "\td_ptr: %#jx\n", ptr); 955 break; 956 case DT_NULL: 957 case DT_SYMBOLIC: 958 case DT_DEBUG: 959 case DT_TEXTREL: 960 break; 961 } 962 } 963 } 964 965 static void 966 elf_print_rela(Elf32_Ehdr *e, void *sh) 967 { 968 u_int64_t offset; 969 u_int64_t entsize; 970 u_int64_t size; 971 u_int64_t name; 972 u_int64_t info; 973 int64_t addend; 974 void *ra; 975 void *v; 976 int i; 977 978 offset = elf_get_off(e, sh, SH_OFFSET); 979 entsize = elf_get_size(e, sh, SH_ENTSIZE); 980 size = elf_get_size(e, sh, SH_SIZE); 981 name = elf_get_word(e, sh, SH_NAME); 982 v = (char *)e + offset; 983 fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name); 984 for (i = 0; (u_int64_t)i < size / entsize; i++) { 985 ra = (char *)v + i * entsize; 986 offset = elf_get_addr(e, ra, RA_OFFSET); 987 info = elf_get_word(e, ra, RA_INFO); 988 addend = elf_get_off(e, ra, RA_ADDEND); 989 fprintf(out, "\n"); 990 fprintf(out, "entry: %d\n", i); 991 fprintf(out, "\tr_offset: %#jx\n", offset); 992 fprintf(out, "\tr_info: %jd\n", (intmax_t)info); 993 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend); 994 } 995 } 996 997 static void 998 elf_print_rel(Elf32_Ehdr *e, void *sh) 999 { 1000 u_int64_t offset; 1001 u_int64_t entsize; 1002 u_int64_t size; 1003 u_int64_t name; 1004 u_int64_t info; 1005 void *r; 1006 void *v; 1007 int i; 1008 1009 offset = elf_get_off(e, sh, SH_OFFSET); 1010 entsize = elf_get_size(e, sh, SH_ENTSIZE); 1011 size = elf_get_size(e, sh, SH_SIZE); 1012 name = elf_get_word(e, sh, SH_NAME); 1013 v = (char *)e + offset; 1014 fprintf(out, "\nrelocation (%s):\n", shstrtab + name); 1015 for (i = 0; (u_int64_t)i < size / entsize; i++) { 1016 r = (char *)v + i * entsize; 1017 offset = elf_get_addr(e, r, R_OFFSET); 1018 info = elf_get_word(e, r, R_INFO); 1019 fprintf(out, "\n"); 1020 fprintf(out, "entry: %d\n", i); 1021 fprintf(out, "\tr_offset: %#jx\n", offset); 1022 fprintf(out, "\tr_info: %jd\n", (intmax_t)info); 1023 } 1024 } 1025 1026 static void 1027 elf_print_interp(Elf32_Ehdr *e, void *p) 1028 { 1029 u_int64_t offset; 1030 char *s; 1031 1032 offset = elf_get_off(e, p, P_OFFSET); 1033 s = (char *)e + offset; 1034 fprintf(out, "\ninterp:\n"); 1035 fprintf(out, "\t%s\n", s); 1036 } 1037 1038 static void 1039 elf_print_got(Elf32_Ehdr *e, void *sh) 1040 { 1041 u_int64_t offset; 1042 u_int64_t addralign; 1043 u_int64_t size; 1044 u_int64_t addr; 1045 void *v; 1046 int i; 1047 1048 offset = elf_get_off(e, sh, SH_OFFSET); 1049 addralign = elf_get_size(e, sh, SH_ADDRALIGN); 1050 size = elf_get_size(e, sh, SH_SIZE); 1051 v = (char *)e + offset; 1052 fprintf(out, "\nglobal offset table:\n"); 1053 for (i = 0; (u_int64_t)i < size / addralign; i++) { 1054 addr = elf_get_addr(e, (char *)v + i * addralign, 0); 1055 fprintf(out, "\n"); 1056 fprintf(out, "entry: %d\n", i); 1057 fprintf(out, "\t%#jx\n", addr); 1058 } 1059 } 1060 1061 static void 1062 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused) 1063 { 1064 } 1065 1066 static void 1067 elf_print_note(Elf32_Ehdr *e, void *sh) 1068 { 1069 u_int64_t offset; 1070 u_int64_t size; 1071 u_int64_t name; 1072 u_int32_t namesz; 1073 u_int32_t descsz; 1074 u_int32_t desc; 1075 u_int32_t type; 1076 char *n, *s; 1077 const char *nt_type; 1078 1079 offset = elf_get_off(e, sh, SH_OFFSET); 1080 size = elf_get_size(e, sh, SH_SIZE); 1081 name = elf_get_word(e, sh, SH_NAME); 1082 n = (char *)e + offset; 1083 fprintf(out, "\nnote (%s):\n", shstrtab + name); 1084 while (n < ((char *)e + offset + size)) { 1085 namesz = elf_get_word(e, n, N_NAMESZ); 1086 descsz = elf_get_word(e, n, N_DESCSZ); 1087 type = elf_get_word(e, n, N_TYPE); 1088 if (type < nitems(nt_types) && nt_types[type] != NULL) 1089 nt_type = nt_types[type]; 1090 else 1091 nt_type = "Unknown type"; 1092 s = n + sizeof(Elf_Note); 1093 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0); 1094 fprintf(out, "\t%s %d (%s)\n", s, desc, nt_type); 1095 n += sizeof(Elf_Note) + namesz + descsz; 1096 } 1097 } 1098 1099 static u_int64_t 1100 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member) 1101 { 1102 u_int64_t val; 1103 1104 val = 0; 1105 switch (e->e_ident[EI_CLASS]) { 1106 case ELFCLASS32: 1107 val = ((uint8_t *)base)[elf32_offsets[member]]; 1108 break; 1109 case ELFCLASS64: 1110 val = ((uint8_t *)base)[elf64_offsets[member]]; 1111 break; 1112 case ELFCLASSNONE: 1113 errx(1, "invalid class"); 1114 } 1115 1116 return val; 1117 } 1118 1119 static u_int64_t 1120 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member) 1121 { 1122 u_int64_t val; 1123 1124 val = 0; 1125 switch (e->e_ident[EI_CLASS]) { 1126 case ELFCLASS32: 1127 base = (char *)base + elf32_offsets[member]; 1128 switch (e->e_ident[EI_DATA]) { 1129 case ELFDATA2MSB: 1130 val = be16dec(base); 1131 break; 1132 case ELFDATA2LSB: 1133 val = le16dec(base); 1134 break; 1135 case ELFDATANONE: 1136 errx(1, "invalid data format"); 1137 } 1138 break; 1139 case ELFCLASS64: 1140 base = (char *)base + elf64_offsets[member]; 1141 switch (e->e_ident[EI_DATA]) { 1142 case ELFDATA2MSB: 1143 val = be16dec(base); 1144 break; 1145 case ELFDATA2LSB: 1146 val = le16dec(base); 1147 break; 1148 case ELFDATANONE: 1149 errx(1, "invalid data format"); 1150 } 1151 break; 1152 case ELFCLASSNONE: 1153 errx(1, "invalid class"); 1154 } 1155 1156 return val; 1157 } 1158 1159 #if 0 1160 static u_int64_t 1161 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member) 1162 { 1163 u_int64_t val; 1164 1165 val = 0; 1166 switch (e->e_ident[EI_CLASS]) { 1167 case ELFCLASS32: 1168 base = (char *)base + elf32_offsets[member]; 1169 switch (e->e_ident[EI_DATA]) { 1170 case ELFDATA2MSB: 1171 val = be16dec(base); 1172 break; 1173 case ELFDATA2LSB: 1174 val = le16dec(base); 1175 break; 1176 case ELFDATANONE: 1177 errx(1, "invalid data format"); 1178 } 1179 break; 1180 case ELFCLASS64: 1181 base = (char *)base + elf64_offsets[member]; 1182 switch (e->e_ident[EI_DATA]) { 1183 case ELFDATA2MSB: 1184 val = be32dec(base); 1185 break; 1186 case ELFDATA2LSB: 1187 val = le32dec(base); 1188 break; 1189 case ELFDATANONE: 1190 errx(1, "invalid data format"); 1191 } 1192 break; 1193 case ELFCLASSNONE: 1194 errx(1, "invalid class"); 1195 } 1196 1197 return val; 1198 } 1199 #endif 1200 1201 static u_int64_t 1202 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member) 1203 { 1204 u_int64_t val; 1205 1206 val = 0; 1207 switch (e->e_ident[EI_CLASS]) { 1208 case ELFCLASS32: 1209 base = (char *)base + elf32_offsets[member]; 1210 switch (e->e_ident[EI_DATA]) { 1211 case ELFDATA2MSB: 1212 val = be32dec(base); 1213 break; 1214 case ELFDATA2LSB: 1215 val = le32dec(base); 1216 break; 1217 case ELFDATANONE: 1218 errx(1, "invalid data format"); 1219 } 1220 break; 1221 case ELFCLASS64: 1222 base = (char *)base + elf64_offsets[member]; 1223 switch (e->e_ident[EI_DATA]) { 1224 case ELFDATA2MSB: 1225 val = be32dec(base); 1226 break; 1227 case ELFDATA2LSB: 1228 val = le32dec(base); 1229 break; 1230 case ELFDATANONE: 1231 errx(1, "invalid data format"); 1232 } 1233 break; 1234 case ELFCLASSNONE: 1235 errx(1, "invalid class"); 1236 } 1237 1238 return val; 1239 } 1240 1241 static u_int64_t 1242 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member) 1243 { 1244 u_int64_t val; 1245 1246 val = 0; 1247 switch (e->e_ident[EI_CLASS]) { 1248 case ELFCLASS32: 1249 base = (char *)base + elf32_offsets[member]; 1250 switch (e->e_ident[EI_DATA]) { 1251 case ELFDATA2MSB: 1252 val = be32dec(base); 1253 break; 1254 case ELFDATA2LSB: 1255 val = le32dec(base); 1256 break; 1257 case ELFDATANONE: 1258 errx(1, "invalid data format"); 1259 } 1260 break; 1261 case ELFCLASS64: 1262 base = (char *)base + elf64_offsets[member]; 1263 switch (e->e_ident[EI_DATA]) { 1264 case ELFDATA2MSB: 1265 val = be64dec(base); 1266 break; 1267 case ELFDATA2LSB: 1268 val = le64dec(base); 1269 break; 1270 case ELFDATANONE: 1271 errx(1, "invalid data format"); 1272 } 1273 break; 1274 case ELFCLASSNONE: 1275 errx(1, "invalid class"); 1276 } 1277 1278 return val; 1279 } 1280 1281 static void 1282 usage(void) 1283 { 1284 fprintf(stderr, 1285 "usage: elfdump -a | -E | -cdeGhinprs [-w file] file\n"); 1286 exit(1); 1287 } 1288