2 * SPDX-License-Identifier: BSD-2-Clause
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 #include <sys/types.h>
33 #include <sys/capsicum.h>
34 #include <sys/elf32.h>
35 #include <sys/elf64.h>
36 #include <sys/endian.h>
39 #include <capsicum_helpers.h>
51 #define ED_EHDR (1<<1)
53 #define ED_HASH (1<<3)
54 #define ED_INTERP (1<<4)
55 #define ED_NOTE (1<<5)
56 #define ED_PHDR (1<<6)
58 #define ED_SHDR (1<<8)
59 #define ED_SYMTAB (1<<9)
60 #define ED_ALL ((1<<10)-1)
61 #define ED_IS_ELF (1<<10) /* Exclusive with other flags */
63 #define elf_get_addr elf_get_quad
64 #define elf_get_off elf_get_quad
65 #define elf_get_size elf_get_quad
68 D_TAG = 1, D_PTR, D_VAL,
70 E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY,
71 E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE,
74 N_NAMESZ, N_DESCSZ, N_TYPE,
76 P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS,
79 SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK,
80 SH_INFO, SH_ADDRALIGN, SH_ENTSIZE,
82 ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX,
86 RA_OFFSET, RA_INFO, RA_ADDEND
89 typedef enum elf_member elf_member_t;
91 static int elf32_offsets[] = {
94 offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr),
95 offsetof(Elf32_Dyn, d_un.d_val),
97 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
98 offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
99 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
100 offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine),
101 offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry),
102 offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff),
103 offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize),
104 offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum),
105 offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum),
106 offsetof(Elf32_Ehdr, e_shstrndx),
108 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
109 offsetof(Elf_Note, n_type),
111 offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset),
112 offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr),
113 offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz),
114 offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align),
116 offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type),
117 offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr),
118 offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size),
119 offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info),
120 offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize),
122 offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value),
123 offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info),
124 offsetof(Elf32_Sym, st_shndx),
126 offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info),
128 offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info),
129 offsetof(Elf32_Rela, r_addend)
132 static int elf64_offsets[] = {
135 offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr),
136 offsetof(Elf64_Dyn, d_un.d_val),
138 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
139 offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
140 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
141 offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine),
142 offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry),
143 offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff),
144 offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize),
145 offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum),
146 offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum),
147 offsetof(Elf64_Ehdr, e_shstrndx),
149 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
150 offsetof(Elf_Note, n_type),
152 offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset),
153 offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr),
154 offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz),
155 offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align),
157 offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type),
158 offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr),
159 offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size),
160 offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info),
161 offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize),
163 offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value),
164 offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info),
165 offsetof(Elf64_Sym, st_shndx),
167 offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info),
169 offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info),
170 offsetof(Elf64_Rela, r_addend)
173 /* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */
175 d_tags(u_int64_t tag)
177 static char unknown_tag[48];
180 case DT_NULL: return "DT_NULL";
181 case DT_NEEDED: return "DT_NEEDED";
182 case DT_PLTRELSZ: return "DT_PLTRELSZ";
183 case DT_PLTGOT: return "DT_PLTGOT";
184 case DT_HASH: return "DT_HASH";
185 case DT_STRTAB: return "DT_STRTAB";
186 case DT_SYMTAB: return "DT_SYMTAB";
187 case DT_RELA: return "DT_RELA";
188 case DT_RELASZ: return "DT_RELASZ";
189 case DT_RELAENT: return "DT_RELAENT";
190 case DT_STRSZ: return "DT_STRSZ";
191 case DT_SYMENT: return "DT_SYMENT";
192 case DT_INIT: return "DT_INIT";
193 case DT_FINI: return "DT_FINI";
194 case DT_SONAME: return "DT_SONAME";
195 case DT_RPATH: return "DT_RPATH";
196 case DT_SYMBOLIC: return "DT_SYMBOLIC";
197 case DT_REL: return "DT_REL";
198 case DT_RELSZ: return "DT_RELSZ";
199 case DT_RELENT: return "DT_RELENT";
200 case DT_PLTREL: return "DT_PLTREL";
201 case DT_DEBUG: return "DT_DEBUG";
202 case DT_TEXTREL: return "DT_TEXTREL";
203 case DT_JMPREL: return "DT_JMPREL";
204 case DT_BIND_NOW: return "DT_BIND_NOW";
205 case DT_INIT_ARRAY: return "DT_INIT_ARRAY";
206 case DT_FINI_ARRAY: return "DT_FINI_ARRAY";
207 case DT_INIT_ARRAYSZ: return "DT_INIT_ARRAYSZ";
208 case DT_FINI_ARRAYSZ: return "DT_FINI_ARRAYSZ";
209 case DT_RUNPATH: return "DT_RUNPATH";
210 case DT_FLAGS: return "DT_FLAGS";
211 case DT_PREINIT_ARRAY: return "DT_PREINIT_ARRAY"; /* XXX DT_ENCODING */
212 case DT_PREINIT_ARRAYSZ:return "DT_PREINIT_ARRAYSZ";
213 /* 0x6000000D - 0x6ffff000 operating system-specific semantics */
214 case 0x6ffffdf5: return "DT_GNU_PRELINKED";
215 case 0x6ffffdf6: return "DT_GNU_CONFLICTSZ";
216 case 0x6ffffdf7: return "DT_GNU_LIBLISTSZ";
217 case 0x6ffffdf8: return "DT_SUNW_CHECKSUM";
218 case DT_PLTPADSZ: return "DT_PLTPADSZ";
219 case DT_MOVEENT: return "DT_MOVEENT";
220 case DT_MOVESZ: return "DT_MOVESZ";
221 case DT_FEATURE: return "DT_FEATURE";
222 case DT_POSFLAG_1: return "DT_POSFLAG_1";
223 case DT_SYMINSZ: return "DT_SYMINSZ";
224 case DT_SYMINENT : return "DT_SYMINENT (DT_VALRNGHI)";
225 case DT_ADDRRNGLO: return "DT_ADDRRNGLO";
226 case DT_GNU_HASH: return "DT_GNU_HASH";
227 case 0x6ffffef8: return "DT_GNU_CONFLICT";
228 case 0x6ffffef9: return "DT_GNU_LIBLIST";
229 case DT_CONFIG: return "DT_CONFIG";
230 case DT_DEPAUDIT: return "DT_DEPAUDIT";
231 case DT_AUDIT: return "DT_AUDIT";
232 case DT_PLTPAD: return "DT_PLTPAD";
233 case DT_MOVETAB: return "DT_MOVETAB";
234 case DT_SYMINFO : return "DT_SYMINFO (DT_ADDRRNGHI)";
235 case DT_RELACOUNT: return "DT_RELACOUNT";
236 case DT_RELCOUNT: return "DT_RELCOUNT";
237 case DT_FLAGS_1: return "DT_FLAGS_1";
238 case DT_VERDEF: return "DT_VERDEF";
239 case DT_VERDEFNUM: return "DT_VERDEFNUM";
240 case DT_VERNEED: return "DT_VERNEED";
241 case DT_VERNEEDNUM: return "DT_VERNEEDNUM";
242 case 0x6ffffff0: return "DT_GNU_VERSYM";
243 /* 0x70000000 - 0x7fffffff processor-specific semantics */
244 case 0x70000000: return "DT_IA_64_PLT_RESERVE";
245 case DT_AUXILIARY: return "DT_AUXILIARY";
246 case DT_USED: return "DT_USED";
247 case DT_FILTER: return "DT_FILTER";
249 snprintf(unknown_tag, sizeof(unknown_tag),
250 "ERROR: TAG NOT DEFINED -- tag 0x%jx", (uintmax_t)tag);
251 return (unknown_tag);
255 e_machines(u_int mach)
257 static char machdesc[64];
260 case EM_NONE: return "EM_NONE";
261 case EM_M32: return "EM_M32";
262 case EM_SPARC: return "EM_SPARC";
263 case EM_386: return "EM_386";
264 case EM_68K: return "EM_68K";
265 case EM_88K: return "EM_88K";
266 case EM_IAMCU: return "EM_IAMCU";
267 case EM_860: return "EM_860";
268 case EM_MIPS: return "EM_MIPS";
269 case EM_PPC: return "EM_PPC";
270 case EM_PPC64: return "EM_PPC64";
271 case EM_ARM: return "EM_ARM";
272 case EM_ALPHA: return "EM_ALPHA (legacy)";
273 case EM_SPARCV9:return "EM_SPARCV9";
274 case EM_IA_64: return "EM_IA_64";
275 case EM_X86_64: return "EM_X86_64";
276 case EM_AARCH64:return "EM_AARCH64";
277 case EM_RISCV: return "EM_RISCV";
279 snprintf(machdesc, sizeof(machdesc),
280 "(unknown machine) -- type 0x%x", mach);
284 static const char *e_types[] = {
285 "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE"
288 static const char *ei_versions[] = {
289 "EV_NONE", "EV_CURRENT"
292 static const char *ei_classes[] = {
293 "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
296 static const char *ei_data[] = {
297 "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
300 static const char *ei_abis[256] = {
301 "ELFOSABI_NONE", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
302 "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX",
303 "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64",
304 "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD",
305 [255] = "ELFOSABI_STANDALONE"
308 static const char *p_types[] = {
309 "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE",
310 "PT_SHLIB", "PT_PHDR", "PT_TLS"
313 static const char *p_flags[] = {
314 "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R",
318 #define NT_ELEM(x) [x] = #x,
319 static const char *nt_types[] = {
321 NT_ELEM(NT_FREEBSD_ABI_TAG)
322 NT_ELEM(NT_FREEBSD_NOINIT_TAG)
323 NT_ELEM(NT_FREEBSD_ARCH_TAG)
324 NT_ELEM(NT_FREEBSD_FEATURE_CTL)
327 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
329 sh_types(uint64_t machine, uint64_t sht) {
330 static char unknown_buf[64];
332 if (sht < 0x60000000) {
334 case SHT_NULL: return "SHT_NULL";
335 case SHT_PROGBITS: return "SHT_PROGBITS";
336 case SHT_SYMTAB: return "SHT_SYMTAB";
337 case SHT_STRTAB: return "SHT_STRTAB";
338 case SHT_RELA: return "SHT_RELA";
339 case SHT_HASH: return "SHT_HASH";
340 case SHT_DYNAMIC: return "SHT_DYNAMIC";
341 case SHT_NOTE: return "SHT_NOTE";
342 case SHT_NOBITS: return "SHT_NOBITS";
343 case SHT_REL: return "SHT_REL";
344 case SHT_SHLIB: return "SHT_SHLIB";
345 case SHT_DYNSYM: return "SHT_DYNSYM";
346 case SHT_INIT_ARRAY: return "SHT_INIT_ARRAY";
347 case SHT_FINI_ARRAY: return "SHT_FINI_ARRAY";
348 case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY";
349 case SHT_GROUP: return "SHT_GROUP";
350 case SHT_SYMTAB_SHNDX: return "SHT_SYMTAB_SHNDX";
352 snprintf(unknown_buf, sizeof(unknown_buf),
353 "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht);
354 return (unknown_buf);
355 } else if (sht < 0x70000000) {
356 /* 0x60000000-0x6fffffff operating system-specific semantics */
358 case 0x6ffffff0: return "XXX:VERSYM";
359 case SHT_SUNW_dof: return "SHT_SUNW_dof";
360 case SHT_GNU_HASH: return "SHT_GNU_HASH";
361 case 0x6ffffff7: return "SHT_GNU_LIBLIST";
362 case 0x6ffffffc: return "XXX:VERDEF";
363 case SHT_SUNW_verdef: return "SHT_SUNW(GNU)_verdef";
364 case SHT_SUNW_verneed: return "SHT_SUNW(GNU)_verneed";
365 case SHT_SUNW_versym: return "SHT_SUNW(GNU)_versym";
367 snprintf(unknown_buf, sizeof(unknown_buf),
368 "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED",
370 return (unknown_buf);
371 } else if (sht < 0x80000000) {
372 /* 0x70000000-0x7fffffff processor-specific semantics */
376 case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX";
377 case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP";
378 case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES";
379 case SHT_ARM_DEBUGOVERLAY:
380 return "SHT_ARM_DEBUGOVERLAY";
381 case SHT_ARM_OVERLAYSECTION:
382 return "SHT_ARM_OVERLAYSECTION";
387 case 0x70000000: return "SHT_IA_64_EXT";
388 case 0x70000001: return "SHT_IA_64_UNWIND";
393 case SHT_MIPS_REGINFO: return "SHT_MIPS_REGINFO";
394 case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS";
395 case SHT_MIPS_ABIFLAGS: return "SHT_MIPS_ABIFLAGS";
400 case 0x7ffffffd: return "XXX:AUXILIARY";
401 case 0x7fffffff: return "XXX:FILTER";
403 snprintf(unknown_buf, sizeof(unknown_buf),
404 "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED",
406 return (unknown_buf);
408 /* 0x80000000-0xffffffff application programs */
409 snprintf(unknown_buf, sizeof(unknown_buf),
410 "ERROR: SHT 0x%jx NOT DEFINED",
412 return (unknown_buf);
416 static const char *sh_flags[] = {
417 "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
418 "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
419 "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
423 st_type(unsigned int mach, unsigned int type)
425 static char s_type[32];
428 case STT_NOTYPE: return "STT_NOTYPE";
429 case STT_OBJECT: return "STT_OBJECT";
430 case STT_FUNC: return "STT_FUNC";
431 case STT_SECTION: return "STT_SECTION";
432 case STT_FILE: return "STT_FILE";
433 case STT_COMMON: return "STT_COMMON";
434 case STT_TLS: return "STT_TLS";
436 if (mach == EM_SPARCV9)
437 return "STT_SPARC_REGISTER";
440 snprintf(s_type, sizeof(s_type), "<unknown: %#x>", type);
444 static const char *st_bindings[] = {
445 "STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
449 static char *shstrtab;
453 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
454 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base,
455 elf_member_t member);
457 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
459 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
460 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
462 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh);
463 static void elf_print_phdr(Elf32_Ehdr *e, void *p);
464 static void elf_print_shdr(Elf32_Ehdr *e, void *sh);
465 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
466 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
467 static void elf_print_rel(Elf32_Ehdr *e, void *r);
468 static void elf_print_rela(Elf32_Ehdr *e, void *ra);
469 static void elf_print_interp(Elf32_Ehdr *e, void *p);
470 static void elf_print_got(Elf32_Ehdr *e, void *sh);
471 static void elf_print_hash(Elf32_Ehdr *e, void *sh);
472 static void elf_print_note(Elf32_Ehdr *e, void *sh);
474 static void usage(void) __dead2;
477 * Helpers for ELF files with shnum or shstrndx values that don't fit in the
478 * ELF header. If the values are too large then an escape value is used to
479 * indicate that the actual value is found in one of section 0's fields.
482 elf_get_shnum(Elf32_Ehdr *e, void *sh)
486 shnum = elf_get_quarter(e, e, E_SHNUM);
488 shnum = elf_get_word(e, (char *)sh, SH_SIZE);
493 elf_get_shstrndx(Elf32_Ehdr *e, void *sh)
497 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
498 if (shstrndx == SHN_XINDEX)
499 shstrndx = elf_get_word(e, (char *)sh, SH_LINK);
504 main(int ac, char **av)
529 while ((ch = getopt(ac, av, "acdEeiGhnprsw:")) != -1)
568 if ((out = fopen(optarg, "w")) == NULL)
569 err(1, "%s", optarg);
570 cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
571 if (caph_rights_limit(fileno(out), &rights) < 0)
572 err(1, "unable to limit rights for %s", optarg);
580 if (ac == 0 || flags == 0 || ((flags & ED_IS_ELF) &&
581 (ac != 1 || (flags & ~ED_IS_ELF) || out != stdout)))
583 if ((fd = open(*av, O_RDONLY)) < 0 ||
586 if ((size_t)sb.st_size < sizeof(Elf32_Ehdr)) {
587 if (flags & ED_IS_ELF)
589 errx(1, "not an elf file");
591 cap_rights_init(&rights, CAP_MMAP_R);
592 if (caph_rights_limit(fd, &rights) < 0)
593 err(1, "unable to limit rights for %s", *av);
594 cap_rights_init(&rights);
595 if (caph_rights_limit(STDIN_FILENO, &rights) < 0 ||
596 caph_limit_stdout() < 0 || caph_limit_stderr() < 0) {
597 err(1, "unable to limit rights for stdio");
599 if (caph_enter() < 0)
600 err(1, "unable to enter capability mode");
601 e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
605 if (flags & ED_IS_ELF)
607 errx(1, "not an elf file");
608 } else if (flags & ED_IS_ELF)
610 phoff = elf_get_off(e, e, E_PHOFF);
611 shoff = elf_get_off(e, e, E_SHOFF);
612 phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
613 phnum = elf_get_quarter(e, e, E_PHNUM);
614 shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
615 p = (char *)e + phoff;
617 sh = (char *)e + shoff;
618 shnum = elf_get_shnum(e, sh);
619 shstrndx = elf_get_shstrndx(e, sh);
620 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
622 shstrtab = (char *)e + offset;
629 for (i = 0; (u_int64_t)i < shnum; i++) {
630 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
631 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
632 if (strcmp(shstrtab + name, ".strtab") == 0)
633 strtab = (char *)e + offset;
634 if (strcmp(shstrtab + name, ".dynstr") == 0)
635 dynstr = (char *)e + offset;
638 elf_print_ehdr(e, sh);
640 elf_print_phdr(e, p);
642 elf_print_shdr(e, sh);
643 for (i = 0; (u_int64_t)i < phnum; i++) {
644 v = (char *)p + i * phentsize;
645 type = elf_get_word(e, v, P_TYPE);
648 if (flags & ED_INTERP)
649 elf_print_interp(e, v);
660 for (i = 0; (u_int64_t)i < shnum; i++) {
661 v = (char *)sh + i * shentsize;
662 type = elf_get_word(e, v, SH_TYPE);
665 if (flags & ED_SYMTAB)
666 elf_print_symtab(e, v, strtab);
670 elf_print_dynamic(e, v);
674 elf_print_rela(e, v);
681 name = elf_get_word(e, v, SH_NAME);
682 if (flags & ED_NOTE &&
683 strcmp(shstrtab + name, ".note.tag") == 0)
684 elf_print_note(e, v);
687 if (flags & ED_SYMTAB)
688 elf_print_symtab(e, v, dynstr);
691 name = elf_get_word(e, v, SH_NAME);
692 if (flags & ED_GOT &&
693 strcmp(shstrtab + name, ".got") == 0)
698 elf_print_hash(e, v);
712 elf_print_ehdr(Elf32_Ehdr *e, void *sh)
731 class = elf_get_byte(e, e, E_CLASS);
732 data = elf_get_byte(e, e, E_DATA);
733 osabi = elf_get_byte(e, e, E_OSABI);
734 type = elf_get_quarter(e, e, E_TYPE);
735 machine = elf_get_quarter(e, e, E_MACHINE);
736 version = elf_get_word(e, e, E_VERSION);
737 entry = elf_get_addr(e, e, E_ENTRY);
738 phoff = elf_get_off(e, e, E_PHOFF);
739 shoff = elf_get_off(e, e, E_SHOFF);
740 flags = elf_get_word(e, e, E_FLAGS);
741 ehsize = elf_get_quarter(e, e, E_EHSIZE);
742 phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
743 phnum = elf_get_quarter(e, e, E_PHNUM);
744 shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
745 fprintf(out, "\nelf header:\n");
747 fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
749 fprintf(out, "\te_type: %s\n", e_types[type]);
750 fprintf(out, "\te_machine: %s\n", e_machines(machine));
751 fprintf(out, "\te_version: %s\n", ei_versions[version]);
752 fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
753 fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
754 fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
755 fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
756 fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
757 fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
758 fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
759 fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
761 shnum = elf_get_shnum(e, sh);
762 shstrndx = elf_get_shstrndx(e, sh);
763 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
764 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
769 elf_print_phdr(Elf32_Ehdr *e, void *p)
784 phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
785 phnum = elf_get_quarter(e, e, E_PHNUM);
786 fprintf(out, "\nprogram header:\n");
787 for (i = 0; (u_int64_t)i < phnum; i++) {
788 v = (char *)p + i * phentsize;
789 type = elf_get_word(e, v, P_TYPE);
790 offset = elf_get_off(e, v, P_OFFSET);
791 vaddr = elf_get_addr(e, v, P_VADDR);
792 paddr = elf_get_addr(e, v, P_PADDR);
793 filesz = elf_get_size(e, v, P_FILESZ);
794 memsz = elf_get_size(e, v, P_MEMSZ);
795 flags = elf_get_word(e, v, P_FLAGS);
796 align = elf_get_size(e, v, P_ALIGN);
798 fprintf(out, "entry: %d\n", i);
799 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
800 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
801 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
802 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
803 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
804 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
805 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
806 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
811 elf_print_shdr(Elf32_Ehdr *e, void *sh)
830 fprintf(out, "\nNo section headers\n");
834 machine = elf_get_quarter(e, e, E_MACHINE);
835 shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
836 shnum = elf_get_shnum(e, sh);
837 fprintf(out, "\nsection header:\n");
838 for (i = 0; (u_int64_t)i < shnum; i++) {
839 v = (char *)sh + i * shentsize;
840 name = elf_get_word(e, v, SH_NAME);
841 type = elf_get_word(e, v, SH_TYPE);
842 flags = elf_get_word(e, v, SH_FLAGS);
843 addr = elf_get_addr(e, v, SH_ADDR);
844 offset = elf_get_off(e, v, SH_OFFSET);
845 size = elf_get_size(e, v, SH_SIZE);
846 shlink = elf_get_word(e, v, SH_LINK);
847 info = elf_get_word(e, v, SH_INFO);
848 addralign = elf_get_size(e, v, SH_ADDRALIGN);
849 entsize = elf_get_size(e, v, SH_ENTSIZE);
851 fprintf(out, "entry: %d\n", i);
852 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
853 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type));
854 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
855 fprintf(out, "\tsh_addr: %#jx\n", addr);
856 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
857 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
858 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
859 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
860 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
861 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
866 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
880 machine = elf_get_quarter(e, e, E_MACHINE);
881 offset = elf_get_off(e, sh, SH_OFFSET);
882 entsize = elf_get_size(e, sh, SH_ENTSIZE);
883 size = elf_get_size(e, sh, SH_SIZE);
884 name = elf_get_word(e, sh, SH_NAME);
885 len = size / entsize;
886 fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
887 for (i = 0; i < len; i++) {
888 st = (char *)e + offset + i * entsize;
889 name = elf_get_word(e, st, ST_NAME);
890 value = elf_get_addr(e, st, ST_VALUE);
891 size = elf_get_size(e, st, ST_SIZE);
892 info = elf_get_byte(e, st, ST_INFO);
893 shndx = elf_get_quarter(e, st, ST_SHNDX);
895 fprintf(out, "entry: %d\n", i);
896 fprintf(out, "\tst_name: %s\n", str + name);
897 fprintf(out, "\tst_value: %#jx\n", value);
898 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
899 fprintf(out, "\tst_info: %s %s\n",
900 st_type(machine, ELF32_ST_TYPE(info)),
901 st_bindings[ELF32_ST_BIND(info)]);
902 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
907 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
918 offset = elf_get_off(e, sh, SH_OFFSET);
919 entsize = elf_get_size(e, sh, SH_ENTSIZE);
920 size = elf_get_size(e, sh, SH_SIZE);
921 fprintf(out, "\ndynamic:\n");
922 for (i = 0; (u_int64_t)i < size / entsize; i++) {
923 d = (char *)e + offset + i * entsize;
924 tag = elf_get_size(e, d, D_TAG);
925 ptr = elf_get_size(e, d, D_PTR);
926 val = elf_get_addr(e, d, D_VAL);
928 fprintf(out, "entry: %d\n", i);
929 fprintf(out, "\td_tag: %s\n", d_tags(tag));
934 fprintf(out, "\td_val: %s\n", dynstr + val);
945 fprintf(out, "\td_val: %jd\n", (intmax_t)val);
955 fprintf(out, "\td_ptr: %#jx\n", ptr);
967 elf_print_rela(Elf32_Ehdr *e, void *sh)
979 offset = elf_get_off(e, sh, SH_OFFSET);
980 entsize = elf_get_size(e, sh, SH_ENTSIZE);
981 size = elf_get_size(e, sh, SH_SIZE);
982 name = elf_get_word(e, sh, SH_NAME);
983 v = (char *)e + offset;
984 fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
985 for (i = 0; (u_int64_t)i < size / entsize; i++) {
986 ra = (char *)v + i * entsize;
987 offset = elf_get_addr(e, ra, RA_OFFSET);
988 info = elf_get_word(e, ra, RA_INFO);
989 addend = elf_get_off(e, ra, RA_ADDEND);
991 fprintf(out, "entry: %d\n", i);
992 fprintf(out, "\tr_offset: %#jx\n", offset);
993 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
994 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
999 elf_print_rel(Elf32_Ehdr *e, void *sh)
1010 offset = elf_get_off(e, sh, SH_OFFSET);
1011 entsize = elf_get_size(e, sh, SH_ENTSIZE);
1012 size = elf_get_size(e, sh, SH_SIZE);
1013 name = elf_get_word(e, sh, SH_NAME);
1014 v = (char *)e + offset;
1015 fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
1016 for (i = 0; (u_int64_t)i < size / entsize; i++) {
1017 r = (char *)v + i * entsize;
1018 offset = elf_get_addr(e, r, R_OFFSET);
1019 info = elf_get_word(e, r, R_INFO);
1021 fprintf(out, "entry: %d\n", i);
1022 fprintf(out, "\tr_offset: %#jx\n", offset);
1023 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
1028 elf_print_interp(Elf32_Ehdr *e, void *p)
1033 offset = elf_get_off(e, p, P_OFFSET);
1034 s = (char *)e + offset;
1035 fprintf(out, "\ninterp:\n");
1036 fprintf(out, "\t%s\n", s);
1040 elf_print_got(Elf32_Ehdr *e, void *sh)
1043 u_int64_t addralign;
1049 offset = elf_get_off(e, sh, SH_OFFSET);
1050 addralign = elf_get_size(e, sh, SH_ADDRALIGN);
1051 size = elf_get_size(e, sh, SH_SIZE);
1052 v = (char *)e + offset;
1053 fprintf(out, "\nglobal offset table:\n");
1054 for (i = 0; (u_int64_t)i < size / addralign; i++) {
1055 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
1057 fprintf(out, "entry: %d\n", i);
1058 fprintf(out, "\t%#jx\n", addr);
1063 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
1068 elf_print_note(Elf32_Ehdr *e, void *sh)
1078 const char *nt_type;
1080 offset = elf_get_off(e, sh, SH_OFFSET);
1081 size = elf_get_size(e, sh, SH_SIZE);
1082 name = elf_get_word(e, sh, SH_NAME);
1083 n = (char *)e + offset;
1084 fprintf(out, "\nnote (%s):\n", shstrtab + name);
1085 while (n < ((char *)e + offset + size)) {
1086 namesz = elf_get_word(e, n, N_NAMESZ);
1087 descsz = elf_get_word(e, n, N_DESCSZ);
1088 type = elf_get_word(e, n, N_TYPE);
1089 if (type < nitems(nt_types) && nt_types[type] != NULL)
1090 nt_type = nt_types[type];
1092 nt_type = "Unknown type";
1093 s = n + sizeof(Elf_Note);
1094 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
1095 fprintf(out, "\t%s %d (%s)\n", s, desc, nt_type);
1096 n += sizeof(Elf_Note) + namesz + descsz;
1101 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
1106 switch (e->e_ident[EI_CLASS]) {
1108 val = ((uint8_t *)base)[elf32_offsets[member]];
1111 val = ((uint8_t *)base)[elf64_offsets[member]];
1114 errx(1, "invalid class");
1121 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
1126 switch (e->e_ident[EI_CLASS]) {
1128 base = (char *)base + elf32_offsets[member];
1129 switch (e->e_ident[EI_DATA]) {
1131 val = be16dec(base);
1134 val = le16dec(base);
1137 errx(1, "invalid data format");
1141 base = (char *)base + elf64_offsets[member];
1142 switch (e->e_ident[EI_DATA]) {
1144 val = be16dec(base);
1147 val = le16dec(base);
1150 errx(1, "invalid data format");
1154 errx(1, "invalid class");
1162 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
1167 switch (e->e_ident[EI_CLASS]) {
1169 base = (char *)base + elf32_offsets[member];
1170 switch (e->e_ident[EI_DATA]) {
1172 val = be16dec(base);
1175 val = le16dec(base);
1178 errx(1, "invalid data format");
1182 base = (char *)base + elf64_offsets[member];
1183 switch (e->e_ident[EI_DATA]) {
1185 val = be32dec(base);
1188 val = le32dec(base);
1191 errx(1, "invalid data format");
1195 errx(1, "invalid class");
1203 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1208 switch (e->e_ident[EI_CLASS]) {
1210 base = (char *)base + elf32_offsets[member];
1211 switch (e->e_ident[EI_DATA]) {
1213 val = be32dec(base);
1216 val = le32dec(base);
1219 errx(1, "invalid data format");
1223 base = (char *)base + elf64_offsets[member];
1224 switch (e->e_ident[EI_DATA]) {
1226 val = be32dec(base);
1229 val = le32dec(base);
1232 errx(1, "invalid data format");
1236 errx(1, "invalid class");
1243 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1248 switch (e->e_ident[EI_CLASS]) {
1250 base = (char *)base + elf32_offsets[member];
1251 switch (e->e_ident[EI_DATA]) {
1253 val = be32dec(base);
1256 val = le32dec(base);
1259 errx(1, "invalid data format");
1263 base = (char *)base + elf64_offsets[member];
1264 switch (e->e_ident[EI_DATA]) {
1266 val = be64dec(base);
1269 val = le64dec(base);
1272 errx(1, "invalid data format");
1276 errx(1, "invalid class");
1286 "usage: elfdump -a | -E | -cdeGhinprs [-w file] file\n");