2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2003 David O'Brien. All rights reserved.
5 * Copyright (c) 2001 Jake Burkholder
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/types.h>
35 #include <sys/capsicum.h>
36 #include <sys/elf32.h>
37 #include <sys/elf64.h>
38 #include <sys/endian.h>
41 #include <capsicum_helpers.h>
53 #define ED_EHDR (1<<1)
55 #define ED_HASH (1<<3)
56 #define ED_INTERP (1<<4)
57 #define ED_NOTE (1<<5)
58 #define ED_PHDR (1<<6)
60 #define ED_SHDR (1<<8)
61 #define ED_SYMTAB (1<<9)
62 #define ED_ALL ((1<<10)-1)
64 #define elf_get_addr elf_get_quad
65 #define elf_get_off elf_get_quad
66 #define elf_get_size elf_get_quad
69 D_TAG = 1, D_PTR, D_VAL,
71 E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY,
72 E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE,
75 N_NAMESZ, N_DESCSZ, N_TYPE,
77 P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS,
80 SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK,
81 SH_INFO, SH_ADDRALIGN, SH_ENTSIZE,
83 ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX,
87 RA_OFFSET, RA_INFO, RA_ADDEND
90 typedef enum elf_member elf_member_t;
92 static int elf32_offsets[] = {
95 offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr),
96 offsetof(Elf32_Dyn, d_un.d_val),
98 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
99 offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
100 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
101 offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine),
102 offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry),
103 offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff),
104 offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize),
105 offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum),
106 offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum),
107 offsetof(Elf32_Ehdr, e_shstrndx),
109 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
110 offsetof(Elf_Note, n_type),
112 offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset),
113 offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr),
114 offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz),
115 offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align),
117 offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type),
118 offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr),
119 offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size),
120 offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info),
121 offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize),
123 offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value),
124 offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info),
125 offsetof(Elf32_Sym, st_shndx),
127 offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info),
129 offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info),
130 offsetof(Elf32_Rela, r_addend)
133 static int elf64_offsets[] = {
136 offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr),
137 offsetof(Elf64_Dyn, d_un.d_val),
139 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
140 offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
141 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
142 offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine),
143 offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry),
144 offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff),
145 offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize),
146 offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum),
147 offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum),
148 offsetof(Elf64_Ehdr, e_shstrndx),
150 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
151 offsetof(Elf_Note, n_type),
153 offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset),
154 offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr),
155 offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz),
156 offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align),
158 offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type),
159 offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr),
160 offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size),
161 offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info),
162 offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize),
164 offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value),
165 offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info),
166 offsetof(Elf64_Sym, st_shndx),
168 offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info),
170 offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info),
171 offsetof(Elf64_Rela, r_addend)
174 /* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */
176 d_tags(u_int64_t tag)
178 static char unknown_tag[48];
181 case DT_NULL: return "DT_NULL";
182 case DT_NEEDED: return "DT_NEEDED";
183 case DT_PLTRELSZ: return "DT_PLTRELSZ";
184 case DT_PLTGOT: return "DT_PLTGOT";
185 case DT_HASH: return "DT_HASH";
186 case DT_STRTAB: return "DT_STRTAB";
187 case DT_SYMTAB: return "DT_SYMTAB";
188 case DT_RELA: return "DT_RELA";
189 case DT_RELASZ: return "DT_RELASZ";
190 case DT_RELAENT: return "DT_RELAENT";
191 case DT_STRSZ: return "DT_STRSZ";
192 case DT_SYMENT: return "DT_SYMENT";
193 case DT_INIT: return "DT_INIT";
194 case DT_FINI: return "DT_FINI";
195 case DT_SONAME: return "DT_SONAME";
196 case DT_RPATH: return "DT_RPATH";
197 case DT_SYMBOLIC: return "DT_SYMBOLIC";
198 case DT_REL: return "DT_REL";
199 case DT_RELSZ: return "DT_RELSZ";
200 case DT_RELENT: return "DT_RELENT";
201 case DT_PLTREL: return "DT_PLTREL";
202 case DT_DEBUG: return "DT_DEBUG";
203 case DT_TEXTREL: return "DT_TEXTREL";
204 case DT_JMPREL: return "DT_JMPREL";
205 case DT_BIND_NOW: return "DT_BIND_NOW";
206 case DT_INIT_ARRAY: return "DT_INIT_ARRAY";
207 case DT_FINI_ARRAY: return "DT_FINI_ARRAY";
208 case DT_INIT_ARRAYSZ: return "DT_INIT_ARRAYSZ";
209 case DT_FINI_ARRAYSZ: return "DT_FINI_ARRAYSZ";
210 case DT_RUNPATH: return "DT_RUNPATH";
211 case DT_FLAGS: return "DT_FLAGS";
212 case DT_PREINIT_ARRAY: return "DT_PREINIT_ARRAY"; /* XXX DT_ENCODING */
213 case DT_PREINIT_ARRAYSZ:return "DT_PREINIT_ARRAYSZ";
214 /* 0x6000000D - 0x6ffff000 operating system-specific semantics */
215 case 0x6ffffdf5: return "DT_GNU_PRELINKED";
216 case 0x6ffffdf6: return "DT_GNU_CONFLICTSZ";
217 case 0x6ffffdf7: return "DT_GNU_LIBLISTSZ";
218 case 0x6ffffdf8: return "DT_SUNW_CHECKSUM";
219 case DT_PLTPADSZ: return "DT_PLTPADSZ";
220 case DT_MOVEENT: return "DT_MOVEENT";
221 case DT_MOVESZ: return "DT_MOVESZ";
222 case DT_FEATURE: return "DT_FEATURE";
223 case DT_POSFLAG_1: return "DT_POSFLAG_1";
224 case DT_SYMINSZ: return "DT_SYMINSZ";
225 case DT_SYMINENT : return "DT_SYMINENT (DT_VALRNGHI)";
226 case DT_ADDRRNGLO: return "DT_ADDRRNGLO";
227 case DT_GNU_HASH: return "DT_GNU_HASH";
228 case 0x6ffffef8: return "DT_GNU_CONFLICT";
229 case 0x6ffffef9: return "DT_GNU_LIBLIST";
230 case DT_CONFIG: return "DT_CONFIG";
231 case DT_DEPAUDIT: return "DT_DEPAUDIT";
232 case DT_AUDIT: return "DT_AUDIT";
233 case DT_PLTPAD: return "DT_PLTPAD";
234 case DT_MOVETAB: return "DT_MOVETAB";
235 case DT_SYMINFO : return "DT_SYMINFO (DT_ADDRRNGHI)";
236 case DT_RELACOUNT: return "DT_RELACOUNT";
237 case DT_RELCOUNT: return "DT_RELCOUNT";
238 case DT_FLAGS_1: return "DT_FLAGS_1";
239 case DT_VERDEF: return "DT_VERDEF";
240 case DT_VERDEFNUM: return "DT_VERDEFNUM";
241 case DT_VERNEED: return "DT_VERNEED";
242 case DT_VERNEEDNUM: return "DT_VERNEEDNUM";
243 case 0x6ffffff0: return "DT_GNU_VERSYM";
244 /* 0x70000000 - 0x7fffffff processor-specific semantics */
245 case 0x70000000: return "DT_IA_64_PLT_RESERVE";
246 case DT_AUXILIARY: return "DT_AUXILIARY";
247 case DT_USED: return "DT_USED";
248 case DT_FILTER: return "DT_FILTER";
250 snprintf(unknown_tag, sizeof(unknown_tag),
251 "ERROR: TAG NOT DEFINED -- tag 0x%jx", (uintmax_t)tag);
252 return (unknown_tag);
256 e_machines(u_int mach)
258 static char machdesc[64];
261 case EM_NONE: return "EM_NONE";
262 case EM_M32: return "EM_M32";
263 case EM_SPARC: return "EM_SPARC";
264 case EM_386: return "EM_386";
265 case EM_68K: return "EM_68K";
266 case EM_88K: return "EM_88K";
267 case EM_IAMCU: return "EM_IAMCU";
268 case EM_860: return "EM_860";
269 case EM_MIPS: return "EM_MIPS";
270 case EM_PPC: return "EM_PPC";
271 case EM_PPC64: return "EM_PPC64";
272 case EM_ARM: return "EM_ARM";
273 case EM_ALPHA: return "EM_ALPHA (legacy)";
274 case EM_SPARCV9:return "EM_SPARCV9";
275 case EM_IA_64: return "EM_IA_64";
276 case EM_X86_64: return "EM_X86_64";
277 case EM_AARCH64:return "EM_AARCH64";
278 case EM_RISCV: return "EM_RISCV";
280 snprintf(machdesc, sizeof(machdesc),
281 "(unknown machine) -- type 0x%x", mach);
285 static const char *e_types[] = {
286 "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE"
289 static const char *ei_versions[] = {
290 "EV_NONE", "EV_CURRENT"
293 static const char *ei_classes[] = {
294 "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
297 static const char *ei_data[] = {
298 "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
301 static const char *ei_abis[256] = {
302 "ELFOSABI_NONE", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
303 "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX",
304 "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64",
305 "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD",
306 [255] = "ELFOSABI_STANDALONE"
309 static const char *p_types[] = {
310 "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE",
311 "PT_SHLIB", "PT_PHDR", "PT_TLS"
314 static const char *p_flags[] = {
315 "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R",
319 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
321 sh_types(uint64_t machine, uint64_t sht) {
322 static char unknown_buf[64];
324 if (sht < 0x60000000) {
326 case SHT_NULL: return "SHT_NULL";
327 case SHT_PROGBITS: return "SHT_PROGBITS";
328 case SHT_SYMTAB: return "SHT_SYMTAB";
329 case SHT_STRTAB: return "SHT_STRTAB";
330 case SHT_RELA: return "SHT_RELA";
331 case SHT_HASH: return "SHT_HASH";
332 case SHT_DYNAMIC: return "SHT_DYNAMIC";
333 case SHT_NOTE: return "SHT_NOTE";
334 case SHT_NOBITS: return "SHT_NOBITS";
335 case SHT_REL: return "SHT_REL";
336 case SHT_SHLIB: return "SHT_SHLIB";
337 case SHT_DYNSYM: return "SHT_DYNSYM";
338 case SHT_INIT_ARRAY: return "SHT_INIT_ARRAY";
339 case SHT_FINI_ARRAY: return "SHT_FINI_ARRAY";
340 case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY";
341 case SHT_GROUP: return "SHT_GROUP";
342 case SHT_SYMTAB_SHNDX: return "SHT_SYMTAB_SHNDX";
344 snprintf(unknown_buf, sizeof(unknown_buf),
345 "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht);
346 return (unknown_buf);
347 } else if (sht < 0x70000000) {
348 /* 0x60000000-0x6fffffff operating system-specific semantics */
350 case 0x6ffffff0: return "XXX:VERSYM";
351 case SHT_SUNW_dof: return "SHT_SUNW_dof";
352 case SHT_GNU_HASH: return "SHT_GNU_HASH";
353 case 0x6ffffff7: return "SHT_GNU_LIBLIST";
354 case 0x6ffffffc: return "XXX:VERDEF";
355 case SHT_SUNW_verdef: return "SHT_SUNW(GNU)_verdef";
356 case SHT_SUNW_verneed: return "SHT_SUNW(GNU)_verneed";
357 case SHT_SUNW_versym: return "SHT_SUNW(GNU)_versym";
359 snprintf(unknown_buf, sizeof(unknown_buf),
360 "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED",
362 return (unknown_buf);
363 } else if (sht < 0x80000000) {
364 /* 0x70000000-0x7fffffff processor-specific semantics */
368 case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX";
369 case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP";
370 case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES";
371 case SHT_ARM_DEBUGOVERLAY:
372 return "SHT_ARM_DEBUGOVERLAY";
373 case SHT_ARM_OVERLAYSECTION:
374 return "SHT_ARM_OVERLAYSECTION";
379 case 0x70000000: return "SHT_IA_64_EXT";
380 case 0x70000001: return "SHT_IA_64_UNWIND";
385 case SHT_MIPS_REGINFO: return "SHT_MIPS_REGINFO";
386 case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS";
387 case SHT_MIPS_ABIFLAGS: return "SHT_MIPS_ABIFLAGS";
392 case 0x7ffffffd: return "XXX:AUXILIARY";
393 case 0x7fffffff: return "XXX:FILTER";
395 snprintf(unknown_buf, sizeof(unknown_buf),
396 "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED",
398 return (unknown_buf);
400 /* 0x80000000-0xffffffff application programs */
401 snprintf(unknown_buf, sizeof(unknown_buf),
402 "ERROR: SHT 0x%jx NOT DEFINED",
404 return (unknown_buf);
408 static const char *sh_flags[] = {
409 "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
410 "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
411 "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
415 st_type(unsigned int mach, unsigned int type)
417 static char s_type[32];
420 case STT_NOTYPE: return "STT_NOTYPE";
421 case STT_OBJECT: return "STT_OBJECT";
422 case STT_FUNC: return "STT_FUNC";
423 case STT_SECTION: return "STT_SECTION";
424 case STT_FILE: return "STT_FILE";
425 case STT_COMMON: return "STT_COMMON";
426 case STT_TLS: return "STT_TLS";
428 if (mach == EM_SPARCV9)
429 return "STT_SPARC_REGISTER";
432 snprintf(s_type, sizeof(s_type), "<unknown: %#x>", type);
436 static const char *st_bindings[] = {
437 "STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
441 static char *shstrtab;
445 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
446 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base,
447 elf_member_t member);
449 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
451 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
452 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
454 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh);
455 static void elf_print_phdr(Elf32_Ehdr *e, void *p);
456 static void elf_print_shdr(Elf32_Ehdr *e, void *sh);
457 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
458 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
459 static void elf_print_rel(Elf32_Ehdr *e, void *r);
460 static void elf_print_rela(Elf32_Ehdr *e, void *ra);
461 static void elf_print_interp(Elf32_Ehdr *e, void *p);
462 static void elf_print_got(Elf32_Ehdr *e, void *sh);
463 static void elf_print_hash(Elf32_Ehdr *e, void *sh);
464 static void elf_print_note(Elf32_Ehdr *e, void *sh);
466 static void usage(void);
469 * Helpers for ELF files with shnum or shstrndx values that don't fit in the
470 * ELF header. If the values are too large then an escape value is used to
471 * indicate that the actual value is found in one of section 0's fields.
474 elf_get_shnum(Elf32_Ehdr *e, void *sh)
478 shnum = elf_get_quarter(e, e, E_SHNUM);
480 shnum = elf_get_word(e, (char *)sh, SH_SIZE);
485 elf_get_shstrndx(Elf32_Ehdr *e, void *sh)
489 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
490 if (shstrndx == SHN_XINDEX)
491 shstrndx = elf_get_word(e, (char *)sh, SH_LINK);
496 main(int ac, char **av)
521 while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1)
557 if ((out = fopen(optarg, "w")) == NULL)
558 err(1, "%s", optarg);
559 cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
560 if (cap_rights_limit(fileno(out), &rights) < 0 && errno != ENOSYS)
561 err(1, "unable to limit rights for %s", optarg);
569 if (ac == 0 || flags == 0)
571 if ((fd = open(*av, O_RDONLY)) < 0 ||
574 cap_rights_init(&rights, CAP_MMAP_R);
575 if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS)
576 err(1, "unable to limit rights for %s", *av);
577 cap_rights_init(&rights);
578 if ((cap_rights_limit(STDIN_FILENO, &rights) < 0 && errno != ENOSYS) ||
579 caph_limit_stdout() < 0 || caph_limit_stderr() < 0) {
580 err(1, "unable to limit rights for stdio");
582 if (caph_enter() < 0)
583 err(1, "unable to enter capability mode");
584 e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
587 if (!IS_ELF(*(Elf32_Ehdr *)e))
588 errx(1, "not an elf file");
589 phoff = elf_get_off(e, e, E_PHOFF);
590 shoff = elf_get_off(e, e, E_SHOFF);
591 phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
592 phnum = elf_get_quarter(e, e, E_PHNUM);
593 shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
594 p = (char *)e + phoff;
596 sh = (char *)e + shoff;
597 shnum = elf_get_shnum(e, sh);
598 shstrndx = elf_get_shstrndx(e, sh);
599 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
601 shstrtab = (char *)e + offset;
608 for (i = 0; (u_int64_t)i < shnum; i++) {
609 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
610 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
611 if (strcmp(shstrtab + name, ".strtab") == 0)
612 strtab = (char *)e + offset;
613 if (strcmp(shstrtab + name, ".dynstr") == 0)
614 dynstr = (char *)e + offset;
617 elf_print_ehdr(e, sh);
619 elf_print_phdr(e, p);
621 elf_print_shdr(e, sh);
622 for (i = 0; (u_int64_t)i < phnum; i++) {
623 v = (char *)p + i * phentsize;
624 type = elf_get_word(e, v, P_TYPE);
627 if (flags & ED_INTERP)
628 elf_print_interp(e, v);
639 for (i = 0; (u_int64_t)i < shnum; i++) {
640 v = (char *)sh + i * shentsize;
641 type = elf_get_word(e, v, SH_TYPE);
644 if (flags & ED_SYMTAB)
645 elf_print_symtab(e, v, strtab);
649 elf_print_dynamic(e, v);
653 elf_print_rela(e, v);
660 name = elf_get_word(e, v, SH_NAME);
661 if (flags & ED_NOTE &&
662 strcmp(shstrtab + name, ".note.tag") == 0)
663 elf_print_note(e, v);
666 if (flags & ED_SYMTAB)
667 elf_print_symtab(e, v, dynstr);
670 name = elf_get_word(e, v, SH_NAME);
671 if (flags & ED_GOT &&
672 strcmp(shstrtab + name, ".got") == 0)
677 elf_print_hash(e, v);
691 elf_print_ehdr(Elf32_Ehdr *e, void *sh)
710 class = elf_get_byte(e, e, E_CLASS);
711 data = elf_get_byte(e, e, E_DATA);
712 osabi = elf_get_byte(e, e, E_OSABI);
713 type = elf_get_quarter(e, e, E_TYPE);
714 machine = elf_get_quarter(e, e, E_MACHINE);
715 version = elf_get_word(e, e, E_VERSION);
716 entry = elf_get_addr(e, e, E_ENTRY);
717 phoff = elf_get_off(e, e, E_PHOFF);
718 shoff = elf_get_off(e, e, E_SHOFF);
719 flags = elf_get_word(e, e, E_FLAGS);
720 ehsize = elf_get_quarter(e, e, E_EHSIZE);
721 phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
722 phnum = elf_get_quarter(e, e, E_PHNUM);
723 shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
724 fprintf(out, "\nelf header:\n");
726 fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
728 fprintf(out, "\te_type: %s\n", e_types[type]);
729 fprintf(out, "\te_machine: %s\n", e_machines(machine));
730 fprintf(out, "\te_version: %s\n", ei_versions[version]);
731 fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
732 fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
733 fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
734 fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
735 fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
736 fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
737 fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
738 fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
740 shnum = elf_get_shnum(e, sh);
741 shstrndx = elf_get_shstrndx(e, sh);
742 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
743 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
748 elf_print_phdr(Elf32_Ehdr *e, void *p)
763 phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
764 phnum = elf_get_quarter(e, e, E_PHNUM);
765 fprintf(out, "\nprogram header:\n");
766 for (i = 0; (u_int64_t)i < phnum; i++) {
767 v = (char *)p + i * phentsize;
768 type = elf_get_word(e, v, P_TYPE);
769 offset = elf_get_off(e, v, P_OFFSET);
770 vaddr = elf_get_addr(e, v, P_VADDR);
771 paddr = elf_get_addr(e, v, P_PADDR);
772 filesz = elf_get_size(e, v, P_FILESZ);
773 memsz = elf_get_size(e, v, P_MEMSZ);
774 flags = elf_get_word(e, v, P_FLAGS);
775 align = elf_get_size(e, v, P_ALIGN);
777 fprintf(out, "entry: %d\n", i);
778 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
779 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
780 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
781 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
782 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
783 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
784 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
785 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
790 elf_print_shdr(Elf32_Ehdr *e, void *sh)
809 fprintf(out, "\nNo section headers\n");
813 machine = elf_get_quarter(e, e, E_MACHINE);
814 shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
815 shnum = elf_get_shnum(e, sh);
816 fprintf(out, "\nsection header:\n");
817 for (i = 0; (u_int64_t)i < shnum; i++) {
818 v = (char *)sh + i * shentsize;
819 name = elf_get_word(e, v, SH_NAME);
820 type = elf_get_word(e, v, SH_TYPE);
821 flags = elf_get_word(e, v, SH_FLAGS);
822 addr = elf_get_addr(e, v, SH_ADDR);
823 offset = elf_get_off(e, v, SH_OFFSET);
824 size = elf_get_size(e, v, SH_SIZE);
825 shlink = elf_get_word(e, v, SH_LINK);
826 info = elf_get_word(e, v, SH_INFO);
827 addralign = elf_get_size(e, v, SH_ADDRALIGN);
828 entsize = elf_get_size(e, v, SH_ENTSIZE);
830 fprintf(out, "entry: %d\n", i);
831 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
832 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type));
833 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
834 fprintf(out, "\tsh_addr: %#jx\n", addr);
835 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
836 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
837 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
838 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
839 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
840 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
845 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
859 machine = elf_get_quarter(e, e, E_MACHINE);
860 offset = elf_get_off(e, sh, SH_OFFSET);
861 entsize = elf_get_size(e, sh, SH_ENTSIZE);
862 size = elf_get_size(e, sh, SH_SIZE);
863 name = elf_get_word(e, sh, SH_NAME);
864 len = size / entsize;
865 fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
866 for (i = 0; i < len; i++) {
867 st = (char *)e + offset + i * entsize;
868 name = elf_get_word(e, st, ST_NAME);
869 value = elf_get_addr(e, st, ST_VALUE);
870 size = elf_get_size(e, st, ST_SIZE);
871 info = elf_get_byte(e, st, ST_INFO);
872 shndx = elf_get_quarter(e, st, ST_SHNDX);
874 fprintf(out, "entry: %d\n", i);
875 fprintf(out, "\tst_name: %s\n", str + name);
876 fprintf(out, "\tst_value: %#jx\n", value);
877 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
878 fprintf(out, "\tst_info: %s %s\n",
879 st_type(machine, ELF32_ST_TYPE(info)),
880 st_bindings[ELF32_ST_BIND(info)]);
881 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
886 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
897 offset = elf_get_off(e, sh, SH_OFFSET);
898 entsize = elf_get_size(e, sh, SH_ENTSIZE);
899 size = elf_get_size(e, sh, SH_SIZE);
900 fprintf(out, "\ndynamic:\n");
901 for (i = 0; (u_int64_t)i < size / entsize; i++) {
902 d = (char *)e + offset + i * entsize;
903 tag = elf_get_size(e, d, D_TAG);
904 ptr = elf_get_size(e, d, D_PTR);
905 val = elf_get_addr(e, d, D_VAL);
907 fprintf(out, "entry: %d\n", i);
908 fprintf(out, "\td_tag: %s\n", d_tags(tag));
913 fprintf(out, "\td_val: %s\n", dynstr + val);
924 fprintf(out, "\td_val: %jd\n", (intmax_t)val);
934 fprintf(out, "\td_ptr: %#jx\n", ptr);
946 elf_print_rela(Elf32_Ehdr *e, void *sh)
958 offset = elf_get_off(e, sh, SH_OFFSET);
959 entsize = elf_get_size(e, sh, SH_ENTSIZE);
960 size = elf_get_size(e, sh, SH_SIZE);
961 name = elf_get_word(e, sh, SH_NAME);
962 v = (char *)e + offset;
963 fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
964 for (i = 0; (u_int64_t)i < size / entsize; i++) {
965 ra = (char *)v + i * entsize;
966 offset = elf_get_addr(e, ra, RA_OFFSET);
967 info = elf_get_word(e, ra, RA_INFO);
968 addend = elf_get_off(e, ra, RA_ADDEND);
970 fprintf(out, "entry: %d\n", i);
971 fprintf(out, "\tr_offset: %#jx\n", offset);
972 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
973 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
978 elf_print_rel(Elf32_Ehdr *e, void *sh)
989 offset = elf_get_off(e, sh, SH_OFFSET);
990 entsize = elf_get_size(e, sh, SH_ENTSIZE);
991 size = elf_get_size(e, sh, SH_SIZE);
992 name = elf_get_word(e, sh, SH_NAME);
993 v = (char *)e + offset;
994 fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
995 for (i = 0; (u_int64_t)i < size / entsize; i++) {
996 r = (char *)v + i * entsize;
997 offset = elf_get_addr(e, r, R_OFFSET);
998 info = elf_get_word(e, r, R_INFO);
1000 fprintf(out, "entry: %d\n", i);
1001 fprintf(out, "\tr_offset: %#jx\n", offset);
1002 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
1007 elf_print_interp(Elf32_Ehdr *e, void *p)
1012 offset = elf_get_off(e, p, P_OFFSET);
1013 s = (char *)e + offset;
1014 fprintf(out, "\ninterp:\n");
1015 fprintf(out, "\t%s\n", s);
1019 elf_print_got(Elf32_Ehdr *e, void *sh)
1022 u_int64_t addralign;
1028 offset = elf_get_off(e, sh, SH_OFFSET);
1029 addralign = elf_get_size(e, sh, SH_ADDRALIGN);
1030 size = elf_get_size(e, sh, SH_SIZE);
1031 v = (char *)e + offset;
1032 fprintf(out, "\nglobal offset table:\n");
1033 for (i = 0; (u_int64_t)i < size / addralign; i++) {
1034 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
1036 fprintf(out, "entry: %d\n", i);
1037 fprintf(out, "\t%#jx\n", addr);
1042 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
1047 elf_print_note(Elf32_Ehdr *e, void *sh)
1057 offset = elf_get_off(e, sh, SH_OFFSET);
1058 size = elf_get_size(e, sh, SH_SIZE);
1059 name = elf_get_word(e, sh, SH_NAME);
1060 n = (char *)e + offset;
1061 fprintf(out, "\nnote (%s):\n", shstrtab + name);
1062 while (n < ((char *)e + offset + size)) {
1063 namesz = elf_get_word(e, n, N_NAMESZ);
1064 descsz = elf_get_word(e, n, N_DESCSZ);
1065 s = n + sizeof(Elf_Note);
1066 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
1067 fprintf(out, "\t%s %d\n", s, desc);
1068 n += sizeof(Elf_Note) + namesz + descsz;
1073 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
1078 switch (e->e_ident[EI_CLASS]) {
1080 val = ((uint8_t *)base)[elf32_offsets[member]];
1083 val = ((uint8_t *)base)[elf64_offsets[member]];
1086 errx(1, "invalid class");
1093 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
1098 switch (e->e_ident[EI_CLASS]) {
1100 base = (char *)base + elf32_offsets[member];
1101 switch (e->e_ident[EI_DATA]) {
1103 val = be16dec(base);
1106 val = le16dec(base);
1109 errx(1, "invalid data format");
1113 base = (char *)base + elf64_offsets[member];
1114 switch (e->e_ident[EI_DATA]) {
1116 val = be16dec(base);
1119 val = le16dec(base);
1122 errx(1, "invalid data format");
1126 errx(1, "invalid class");
1134 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
1139 switch (e->e_ident[EI_CLASS]) {
1141 base = (char *)base + elf32_offsets[member];
1142 switch (e->e_ident[EI_DATA]) {
1144 val = be16dec(base);
1147 val = le16dec(base);
1150 errx(1, "invalid data format");
1154 base = (char *)base + elf64_offsets[member];
1155 switch (e->e_ident[EI_DATA]) {
1157 val = be32dec(base);
1160 val = le32dec(base);
1163 errx(1, "invalid data format");
1167 errx(1, "invalid class");
1175 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1180 switch (e->e_ident[EI_CLASS]) {
1182 base = (char *)base + elf32_offsets[member];
1183 switch (e->e_ident[EI_DATA]) {
1185 val = be32dec(base);
1188 val = le32dec(base);
1191 errx(1, "invalid data format");
1195 base = (char *)base + elf64_offsets[member];
1196 switch (e->e_ident[EI_DATA]) {
1198 val = be32dec(base);
1201 val = le32dec(base);
1204 errx(1, "invalid data format");
1208 errx(1, "invalid class");
1215 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1220 switch (e->e_ident[EI_CLASS]) {
1222 base = (char *)base + elf32_offsets[member];
1223 switch (e->e_ident[EI_DATA]) {
1225 val = be32dec(base);
1228 val = le32dec(base);
1231 errx(1, "invalid data format");
1235 base = (char *)base + elf64_offsets[member];
1236 switch (e->e_ident[EI_DATA]) {
1238 val = be64dec(base);
1241 val = le64dec(base);
1244 errx(1, "invalid data format");
1248 errx(1, "invalid class");
1257 fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n");