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