2 * Copyright (c) 2003 David O'Brien. All rights reserved.
3 * Copyright (c) 2001 Jake Burkholder
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
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)
62 #define elf_get_addr elf_get_quad
63 #define elf_get_off elf_get_quad
64 #define elf_get_size elf_get_quad
67 D_TAG = 1, D_PTR, D_VAL,
69 E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY,
70 E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE,
73 N_NAMESZ, N_DESCSZ, N_TYPE,
75 P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS,
78 SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK,
79 SH_INFO, SH_ADDRALIGN, SH_ENTSIZE,
81 ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX,
85 RA_OFFSET, RA_INFO, RA_ADDEND
88 typedef enum elf_member elf_member_t;
90 static int elf32_offsets[] = {
93 offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr),
94 offsetof(Elf32_Dyn, d_un.d_val),
96 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
97 offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
98 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
99 offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine),
100 offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry),
101 offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff),
102 offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize),
103 offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum),
104 offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum),
105 offsetof(Elf32_Ehdr, e_shstrndx),
107 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
108 offsetof(Elf_Note, n_type),
110 offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset),
111 offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr),
112 offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz),
113 offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align),
115 offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type),
116 offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr),
117 offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size),
118 offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info),
119 offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize),
121 offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value),
122 offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info),
123 offsetof(Elf32_Sym, st_shndx),
125 offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info),
127 offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info),
128 offsetof(Elf32_Rela, r_addend)
131 static int elf64_offsets[] = {
134 offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr),
135 offsetof(Elf64_Dyn, d_un.d_val),
137 offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
138 offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
139 offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
140 offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine),
141 offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry),
142 offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff),
143 offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize),
144 offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum),
145 offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum),
146 offsetof(Elf64_Ehdr, e_shstrndx),
148 offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
149 offsetof(Elf_Note, n_type),
151 offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset),
152 offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr),
153 offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz),
154 offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align),
156 offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type),
157 offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr),
158 offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size),
159 offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info),
160 offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize),
162 offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value),
163 offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info),
164 offsetof(Elf64_Sym, st_shndx),
166 offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info),
168 offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info),
169 offsetof(Elf64_Rela, r_addend)
172 /* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */
174 d_tags(u_int64_t tag)
176 static char unknown_tag[48];
179 case DT_NULL: return "DT_NULL";
180 case DT_NEEDED: return "DT_NEEDED";
181 case DT_PLTRELSZ: return "DT_PLTRELSZ";
182 case DT_PLTGOT: return "DT_PLTGOT";
183 case DT_HASH: return "DT_HASH";
184 case DT_STRTAB: return "DT_STRTAB";
185 case DT_SYMTAB: return "DT_SYMTAB";
186 case DT_RELA: return "DT_RELA";
187 case DT_RELASZ: return "DT_RELASZ";
188 case DT_RELAENT: return "DT_RELAENT";
189 case DT_STRSZ: return "DT_STRSZ";
190 case DT_SYMENT: return "DT_SYMENT";
191 case DT_INIT: return "DT_INIT";
192 case DT_FINI: return "DT_FINI";
193 case DT_SONAME: return "DT_SONAME";
194 case DT_RPATH: return "DT_RPATH";
195 case DT_SYMBOLIC: return "DT_SYMBOLIC";
196 case DT_REL: return "DT_REL";
197 case DT_RELSZ: return "DT_RELSZ";
198 case DT_RELENT: return "DT_RELENT";
199 case DT_PLTREL: return "DT_PLTREL";
200 case DT_DEBUG: return "DT_DEBUG";
201 case DT_TEXTREL: return "DT_TEXTREL";
202 case DT_JMPREL: return "DT_JMPREL";
203 case DT_BIND_NOW: return "DT_BIND_NOW";
204 case DT_INIT_ARRAY: return "DT_INIT_ARRAY";
205 case DT_FINI_ARRAY: return "DT_FINI_ARRAY";
206 case DT_INIT_ARRAYSZ: return "DT_INIT_ARRAYSZ";
207 case DT_FINI_ARRAYSZ: return "DT_FINI_ARRAYSZ";
208 case DT_RUNPATH: return "DT_RUNPATH";
209 case DT_FLAGS: return "DT_FLAGS";
210 case DT_PREINIT_ARRAY: return "DT_PREINIT_ARRAY"; /* XXX DT_ENCODING */
211 case DT_PREINIT_ARRAYSZ:return "DT_PREINIT_ARRAYSZ";
212 /* 0x6000000D - 0x6ffff000 operating system-specific semantics */
213 case 0x6ffffdf5: return "DT_GNU_PRELINKED";
214 case 0x6ffffdf6: return "DT_GNU_CONFLICTSZ";
215 case 0x6ffffdf7: return "DT_GNU_LIBLISTSZ";
216 case 0x6ffffdf8: return "DT_SUNW_CHECKSUM";
217 case DT_PLTPADSZ: return "DT_PLTPADSZ";
218 case DT_MOVEENT: return "DT_MOVEENT";
219 case DT_MOVESZ: return "DT_MOVESZ";
220 case DT_FEATURE: return "DT_FEATURE";
221 case DT_POSFLAG_1: return "DT_POSFLAG_1";
222 case DT_SYMINSZ: return "DT_SYMINSZ";
223 case DT_SYMINENT : return "DT_SYMINENT (DT_VALRNGHI)";
224 case DT_ADDRRNGLO: return "DT_ADDRRNGLO";
225 case DT_GNU_HASH: return "DT_GNU_HASH";
226 case 0x6ffffef8: return "DT_GNU_CONFLICT";
227 case 0x6ffffef9: return "DT_GNU_LIBLIST";
228 case DT_CONFIG: return "DT_CONFIG";
229 case DT_DEPAUDIT: return "DT_DEPAUDIT";
230 case DT_AUDIT: return "DT_AUDIT";
231 case DT_PLTPAD: return "DT_PLTPAD";
232 case DT_MOVETAB: return "DT_MOVETAB";
233 case DT_SYMINFO : return "DT_SYMINFO (DT_ADDRRNGHI)";
234 case DT_RELACOUNT: return "DT_RELACOUNT";
235 case DT_RELCOUNT: return "DT_RELCOUNT";
236 case DT_FLAGS_1: return "DT_FLAGS_1";
237 case DT_VERDEF: return "DT_VERDEF";
238 case DT_VERDEFNUM: return "DT_VERDEFNUM";
239 case DT_VERNEED: return "DT_VERNEED";
240 case DT_VERNEEDNUM: return "DT_VERNEEDNUM";
241 case 0x6ffffff0: return "DT_GNU_VERSYM";
242 /* 0x70000000 - 0x7fffffff processor-specific semantics */
243 case 0x70000000: return "DT_IA_64_PLT_RESERVE";
244 case DT_AUXILIARY: return "DT_AUXILIARY";
245 case DT_USED: return "DT_USED";
246 case DT_FILTER: return "DT_FILTER";
248 snprintf(unknown_tag, sizeof(unknown_tag),
249 "ERROR: TAG NOT DEFINED -- tag 0x%jx", (uintmax_t)tag);
250 return (unknown_tag);
254 e_machines(u_int mach)
256 static char machdesc[64];
259 case EM_NONE: return "EM_NONE";
260 case EM_M32: return "EM_M32";
261 case EM_SPARC: return "EM_SPARC";
262 case EM_386: return "EM_386";
263 case EM_68K: return "EM_68K";
264 case EM_88K: return "EM_88K";
265 case EM_IAMCU: return "EM_IAMCU";
266 case EM_860: return "EM_860";
267 case EM_MIPS: return "EM_MIPS";
268 case EM_PPC: return "EM_PPC";
269 case EM_PPC64: return "EM_PPC64";
270 case EM_ARM: return "EM_ARM";
271 case EM_ALPHA: return "EM_ALPHA (legacy)";
272 case EM_SPARCV9:return "EM_SPARCV9";
273 case EM_IA_64: return "EM_IA_64";
274 case EM_X86_64: return "EM_X86_64";
275 case EM_AARCH64:return "EM_AARCH64";
276 case EM_RISCV: return "EM_RISCV";
278 snprintf(machdesc, sizeof(machdesc),
279 "(unknown machine) -- type 0x%x", mach);
283 static const char *e_types[] = {
284 "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE"
287 static const char *ei_versions[] = {
288 "EV_NONE", "EV_CURRENT"
291 static const char *ei_classes[] = {
292 "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
295 static const char *ei_data[] = {
296 "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
299 static const char *ei_abis[256] = {
300 "ELFOSABI_NONE", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
301 "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX",
302 "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64",
303 "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD",
304 [255] = "ELFOSABI_STANDALONE"
307 static const char *p_types[] = {
308 "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE",
309 "PT_SHLIB", "PT_PHDR", "PT_TLS"
312 static const char *p_flags[] = {
313 "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R",
317 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
319 sh_types(uint64_t machine, uint64_t sht) {
320 static char unknown_buf[64];
322 if (sht < 0x60000000) {
324 case SHT_NULL: return "SHT_NULL";
325 case SHT_PROGBITS: return "SHT_PROGBITS";
326 case SHT_SYMTAB: return "SHT_SYMTAB";
327 case SHT_STRTAB: return "SHT_STRTAB";
328 case SHT_RELA: return "SHT_RELA";
329 case SHT_HASH: return "SHT_HASH";
330 case SHT_DYNAMIC: return "SHT_DYNAMIC";
331 case SHT_NOTE: return "SHT_NOTE";
332 case SHT_NOBITS: return "SHT_NOBITS";
333 case SHT_REL: return "SHT_REL";
334 case SHT_SHLIB: return "SHT_SHLIB";
335 case SHT_DYNSYM: return "SHT_DYNSYM";
336 case SHT_INIT_ARRAY: return "SHT_INIT_ARRAY";
337 case SHT_FINI_ARRAY: return "SHT_FINI_ARRAY";
338 case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY";
339 case SHT_GROUP: return "SHT_GROUP";
340 case SHT_SYMTAB_SHNDX: return "SHT_SYMTAB_SHNDX";
342 snprintf(unknown_buf, sizeof(unknown_buf),
343 "ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht);
344 return (unknown_buf);
345 } else if (sht < 0x70000000) {
346 /* 0x60000000-0x6fffffff operating system-specific semantics */
348 case 0x6ffffff0: return "XXX:VERSYM";
349 case SHT_SUNW_dof: return "SHT_SUNW_dof";
350 case SHT_GNU_HASH: return "SHT_GNU_HASH";
351 case 0x6ffffff7: return "SHT_GNU_LIBLIST";
352 case 0x6ffffffc: return "XXX:VERDEF";
353 case SHT_SUNW_verdef: return "SHT_SUNW(GNU)_verdef";
354 case SHT_SUNW_verneed: return "SHT_SUNW(GNU)_verneed";
355 case SHT_SUNW_versym: return "SHT_SUNW(GNU)_versym";
357 snprintf(unknown_buf, sizeof(unknown_buf),
358 "ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED",
360 return (unknown_buf);
361 } else if (sht < 0x80000000) {
362 /* 0x70000000-0x7fffffff processor-specific semantics */
366 case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX";
367 case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP";
368 case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES";
369 case SHT_ARM_DEBUGOVERLAY:
370 return "SHT_ARM_DEBUGOVERLAY";
371 case SHT_ARM_OVERLAYSECTION:
372 return "SHT_ARM_OVERLAYSECTION";
377 case 0x70000000: return "SHT_IA_64_EXT";
378 case 0x70000001: return "SHT_IA_64_UNWIND";
383 case SHT_MIPS_REGINFO: return "SHT_MIPS_REGINFO";
384 case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS";
385 case SHT_MIPS_ABIFLAGS: return "SHT_MIPS_ABIFLAGS";
390 case 0x7ffffffd: return "XXX:AUXILIARY";
391 case 0x7fffffff: return "XXX:FILTER";
393 snprintf(unknown_buf, sizeof(unknown_buf),
394 "ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED",
396 return (unknown_buf);
398 /* 0x80000000-0xffffffff application programs */
399 snprintf(unknown_buf, sizeof(unknown_buf),
400 "ERROR: SHT 0x%jx NOT DEFINED",
402 return (unknown_buf);
406 static const char *sh_flags[] = {
407 "", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
408 "SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
409 "SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
413 st_type(unsigned int mach, unsigned int type)
415 static char s_type[32];
418 case STT_NOTYPE: return "STT_NOTYPE";
419 case STT_OBJECT: return "STT_OBJECT";
420 case STT_FUNC: return "STT_FUNC";
421 case STT_SECTION: return "STT_SECTION";
422 case STT_FILE: return "STT_FILE";
423 case STT_COMMON: return "STT_COMMON";
424 case STT_TLS: return "STT_TLS";
426 if (mach == EM_SPARCV9)
427 return "STT_SPARC_REGISTER";
430 snprintf(s_type, sizeof(s_type), "<unknown: %#x>", type);
434 static const char *st_bindings[] = {
435 "STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
439 static char *shstrtab;
443 static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
444 static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base,
445 elf_member_t member);
447 static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
449 static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
450 static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
452 static void elf_print_ehdr(Elf32_Ehdr *e, void *sh);
453 static void elf_print_phdr(Elf32_Ehdr *e, void *p);
454 static void elf_print_shdr(Elf32_Ehdr *e, void *sh);
455 static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
456 static void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
457 static void elf_print_rel(Elf32_Ehdr *e, void *r);
458 static void elf_print_rela(Elf32_Ehdr *e, void *ra);
459 static void elf_print_interp(Elf32_Ehdr *e, void *p);
460 static void elf_print_got(Elf32_Ehdr *e, void *sh);
461 static void elf_print_hash(Elf32_Ehdr *e, void *sh);
462 static void elf_print_note(Elf32_Ehdr *e, void *sh);
464 static void usage(void);
467 * Helpers for ELF files with shnum or shstrndx values that don't fit in the
468 * ELF header. If the values are too large then an escape value is used to
469 * indicate that the actual value is found in one of section 0's fields.
472 elf_get_shnum(Elf32_Ehdr *e, void *sh)
476 shnum = elf_get_quarter(e, e, E_SHNUM);
478 shnum = elf_get_word(e, (char *)sh, SH_SIZE);
483 elf_get_shstrndx(Elf32_Ehdr *e, void *sh)
487 shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
488 if (shstrndx == SHN_XINDEX)
489 shstrndx = elf_get_word(e, (char *)sh, SH_LINK);
494 main(int ac, char **av)
519 while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1)
555 if ((out = fopen(optarg, "w")) == NULL)
556 err(1, "%s", optarg);
557 cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
558 if (cap_rights_limit(fileno(out), &rights) < 0 && errno != ENOSYS)
559 err(1, "unable to limit rights for %s", optarg);
567 if (ac == 0 || flags == 0)
569 if ((fd = open(*av, O_RDONLY)) < 0 ||
572 cap_rights_init(&rights, CAP_MMAP_R);
573 if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS)
574 err(1, "unable to limit rights for %s", *av);
575 cap_rights_init(&rights);
576 if ((cap_rights_limit(STDIN_FILENO, &rights) < 0 && errno != ENOSYS) ||
577 caph_limit_stdout() < 0 || caph_limit_stderr() < 0) {
578 err(1, "unable to limit rights for stdio");
580 if (cap_enter() < 0 && errno != ENOSYS)
581 err(1, "unable to enter capability mode");
582 e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
585 if (!IS_ELF(*(Elf32_Ehdr *)e))
586 errx(1, "not an elf file");
587 phoff = elf_get_off(e, e, E_PHOFF);
588 shoff = elf_get_off(e, e, E_SHOFF);
589 phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
590 phnum = elf_get_quarter(e, e, E_PHNUM);
591 shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
592 p = (char *)e + phoff;
594 sh = (char *)e + shoff;
595 shnum = elf_get_shnum(e, sh);
596 shstrndx = elf_get_shstrndx(e, sh);
597 offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
599 shstrtab = (char *)e + offset;
606 for (i = 0; (u_int64_t)i < shnum; i++) {
607 name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
608 offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
609 if (strcmp(shstrtab + name, ".strtab") == 0)
610 strtab = (char *)e + offset;
611 if (strcmp(shstrtab + name, ".dynstr") == 0)
612 dynstr = (char *)e + offset;
615 elf_print_ehdr(e, sh);
617 elf_print_phdr(e, p);
619 elf_print_shdr(e, sh);
620 for (i = 0; (u_int64_t)i < phnum; i++) {
621 v = (char *)p + i * phentsize;
622 type = elf_get_word(e, v, P_TYPE);
625 if (flags & ED_INTERP)
626 elf_print_interp(e, v);
637 for (i = 0; (u_int64_t)i < shnum; i++) {
638 v = (char *)sh + i * shentsize;
639 type = elf_get_word(e, v, SH_TYPE);
642 if (flags & ED_SYMTAB)
643 elf_print_symtab(e, v, strtab);
647 elf_print_dynamic(e, v);
651 elf_print_rela(e, v);
658 name = elf_get_word(e, v, SH_NAME);
659 if (flags & ED_NOTE &&
660 strcmp(shstrtab + name, ".note.ABI-tag") == 0)
661 elf_print_note(e, v);
664 if (flags & ED_SYMTAB)
665 elf_print_symtab(e, v, dynstr);
668 name = elf_get_word(e, v, SH_NAME);
669 if (flags & ED_GOT &&
670 strcmp(shstrtab + name, ".got") == 0)
675 elf_print_hash(e, v);
689 elf_print_ehdr(Elf32_Ehdr *e, void *sh)
708 class = elf_get_byte(e, e, E_CLASS);
709 data = elf_get_byte(e, e, E_DATA);
710 osabi = elf_get_byte(e, e, E_OSABI);
711 type = elf_get_quarter(e, e, E_TYPE);
712 machine = elf_get_quarter(e, e, E_MACHINE);
713 version = elf_get_word(e, e, E_VERSION);
714 entry = elf_get_addr(e, e, E_ENTRY);
715 phoff = elf_get_off(e, e, E_PHOFF);
716 shoff = elf_get_off(e, e, E_SHOFF);
717 flags = elf_get_word(e, e, E_FLAGS);
718 ehsize = elf_get_quarter(e, e, E_EHSIZE);
719 phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
720 phnum = elf_get_quarter(e, e, E_PHNUM);
721 shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
722 fprintf(out, "\nelf header:\n");
724 fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
726 fprintf(out, "\te_type: %s\n", e_types[type]);
727 fprintf(out, "\te_machine: %s\n", e_machines(machine));
728 fprintf(out, "\te_version: %s\n", ei_versions[version]);
729 fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
730 fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
731 fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
732 fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
733 fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
734 fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
735 fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
736 fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
738 shnum = elf_get_shnum(e, sh);
739 shstrndx = elf_get_shstrndx(e, sh);
740 fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
741 fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
746 elf_print_phdr(Elf32_Ehdr *e, void *p)
761 phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
762 phnum = elf_get_quarter(e, e, E_PHNUM);
763 fprintf(out, "\nprogram header:\n");
764 for (i = 0; (u_int64_t)i < phnum; i++) {
765 v = (char *)p + i * phentsize;
766 type = elf_get_word(e, v, P_TYPE);
767 offset = elf_get_off(e, v, P_OFFSET);
768 vaddr = elf_get_addr(e, v, P_VADDR);
769 paddr = elf_get_addr(e, v, P_PADDR);
770 filesz = elf_get_size(e, v, P_FILESZ);
771 memsz = elf_get_size(e, v, P_MEMSZ);
772 flags = elf_get_word(e, v, P_FLAGS);
773 align = elf_get_size(e, v, P_ALIGN);
775 fprintf(out, "entry: %d\n", i);
776 fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
777 fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
778 fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
779 fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
780 fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
781 fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
782 fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
783 fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
788 elf_print_shdr(Elf32_Ehdr *e, void *sh)
807 fprintf(out, "\nNo section headers\n");
811 machine = elf_get_quarter(e, e, E_MACHINE);
812 shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
813 shnum = elf_get_shnum(e, sh);
814 fprintf(out, "\nsection header:\n");
815 for (i = 0; (u_int64_t)i < shnum; i++) {
816 v = (char *)sh + i * shentsize;
817 name = elf_get_word(e, v, SH_NAME);
818 type = elf_get_word(e, v, SH_TYPE);
819 flags = elf_get_word(e, v, SH_FLAGS);
820 addr = elf_get_addr(e, v, SH_ADDR);
821 offset = elf_get_off(e, v, SH_OFFSET);
822 size = elf_get_size(e, v, SH_SIZE);
823 shlink = elf_get_word(e, v, SH_LINK);
824 info = elf_get_word(e, v, SH_INFO);
825 addralign = elf_get_size(e, v, SH_ADDRALIGN);
826 entsize = elf_get_size(e, v, SH_ENTSIZE);
828 fprintf(out, "entry: %d\n", i);
829 fprintf(out, "\tsh_name: %s\n", shstrtab + name);
830 fprintf(out, "\tsh_type: %s\n", sh_types(machine, type));
831 fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
832 fprintf(out, "\tsh_addr: %#jx\n", addr);
833 fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
834 fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
835 fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
836 fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
837 fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
838 fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
843 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
857 machine = elf_get_quarter(e, e, E_MACHINE);
858 offset = elf_get_off(e, sh, SH_OFFSET);
859 entsize = elf_get_size(e, sh, SH_ENTSIZE);
860 size = elf_get_size(e, sh, SH_SIZE);
861 name = elf_get_word(e, sh, SH_NAME);
862 len = size / entsize;
863 fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
864 for (i = 0; i < len; i++) {
865 st = (char *)e + offset + i * entsize;
866 name = elf_get_word(e, st, ST_NAME);
867 value = elf_get_addr(e, st, ST_VALUE);
868 size = elf_get_size(e, st, ST_SIZE);
869 info = elf_get_byte(e, st, ST_INFO);
870 shndx = elf_get_quarter(e, st, ST_SHNDX);
872 fprintf(out, "entry: %d\n", i);
873 fprintf(out, "\tst_name: %s\n", str + name);
874 fprintf(out, "\tst_value: %#jx\n", value);
875 fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
876 fprintf(out, "\tst_info: %s %s\n",
877 st_type(machine, ELF32_ST_TYPE(info)),
878 st_bindings[ELF32_ST_BIND(info)]);
879 fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
884 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
895 offset = elf_get_off(e, sh, SH_OFFSET);
896 entsize = elf_get_size(e, sh, SH_ENTSIZE);
897 size = elf_get_size(e, sh, SH_SIZE);
898 fprintf(out, "\ndynamic:\n");
899 for (i = 0; (u_int64_t)i < size / entsize; i++) {
900 d = (char *)e + offset + i * entsize;
901 tag = elf_get_size(e, d, D_TAG);
902 ptr = elf_get_size(e, d, D_PTR);
903 val = elf_get_addr(e, d, D_VAL);
905 fprintf(out, "entry: %d\n", i);
906 fprintf(out, "\td_tag: %s\n", d_tags(tag));
911 fprintf(out, "\td_val: %s\n", dynstr + val);
922 fprintf(out, "\td_val: %jd\n", (intmax_t)val);
932 fprintf(out, "\td_ptr: %#jx\n", ptr);
944 elf_print_rela(Elf32_Ehdr *e, void *sh)
956 offset = elf_get_off(e, sh, SH_OFFSET);
957 entsize = elf_get_size(e, sh, SH_ENTSIZE);
958 size = elf_get_size(e, sh, SH_SIZE);
959 name = elf_get_word(e, sh, SH_NAME);
960 v = (char *)e + offset;
961 fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
962 for (i = 0; (u_int64_t)i < size / entsize; i++) {
963 ra = (char *)v + i * entsize;
964 offset = elf_get_addr(e, ra, RA_OFFSET);
965 info = elf_get_word(e, ra, RA_INFO);
966 addend = elf_get_off(e, ra, RA_ADDEND);
968 fprintf(out, "entry: %d\n", i);
969 fprintf(out, "\tr_offset: %#jx\n", offset);
970 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
971 fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
976 elf_print_rel(Elf32_Ehdr *e, void *sh)
987 offset = elf_get_off(e, sh, SH_OFFSET);
988 entsize = elf_get_size(e, sh, SH_ENTSIZE);
989 size = elf_get_size(e, sh, SH_SIZE);
990 name = elf_get_word(e, sh, SH_NAME);
991 v = (char *)e + offset;
992 fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
993 for (i = 0; (u_int64_t)i < size / entsize; i++) {
994 r = (char *)v + i * entsize;
995 offset = elf_get_addr(e, r, R_OFFSET);
996 info = elf_get_word(e, r, R_INFO);
998 fprintf(out, "entry: %d\n", i);
999 fprintf(out, "\tr_offset: %#jx\n", offset);
1000 fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
1005 elf_print_interp(Elf32_Ehdr *e, void *p)
1010 offset = elf_get_off(e, p, P_OFFSET);
1011 s = (char *)e + offset;
1012 fprintf(out, "\ninterp:\n");
1013 fprintf(out, "\t%s\n", s);
1017 elf_print_got(Elf32_Ehdr *e, void *sh)
1020 u_int64_t addralign;
1026 offset = elf_get_off(e, sh, SH_OFFSET);
1027 addralign = elf_get_size(e, sh, SH_ADDRALIGN);
1028 size = elf_get_size(e, sh, SH_SIZE);
1029 v = (char *)e + offset;
1030 fprintf(out, "\nglobal offset table:\n");
1031 for (i = 0; (u_int64_t)i < size / addralign; i++) {
1032 addr = elf_get_addr(e, (char *)v + i * addralign, 0);
1034 fprintf(out, "entry: %d\n", i);
1035 fprintf(out, "\t%#jx\n", addr);
1040 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
1045 elf_print_note(Elf32_Ehdr *e, void *sh)
1055 offset = elf_get_off(e, sh, SH_OFFSET);
1056 size = elf_get_size(e, sh, SH_SIZE);
1057 name = elf_get_word(e, sh, SH_NAME);
1058 n = (char *)e + offset;
1059 fprintf(out, "\nnote (%s):\n", shstrtab + name);
1060 while (n < ((char *)e + offset + size)) {
1061 namesz = elf_get_word(e, n, N_NAMESZ);
1062 descsz = elf_get_word(e, n, N_DESCSZ);
1063 s = n + sizeof(Elf_Note);
1064 desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
1065 fprintf(out, "\t%s %d\n", s, desc);
1066 n += sizeof(Elf_Note) + namesz + descsz;
1071 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
1076 switch (e->e_ident[EI_CLASS]) {
1078 val = ((uint8_t *)base)[elf32_offsets[member]];
1081 val = ((uint8_t *)base)[elf64_offsets[member]];
1084 errx(1, "invalid class");
1091 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
1096 switch (e->e_ident[EI_CLASS]) {
1098 base = (char *)base + elf32_offsets[member];
1099 switch (e->e_ident[EI_DATA]) {
1101 val = be16dec(base);
1104 val = le16dec(base);
1107 errx(1, "invalid data format");
1111 base = (char *)base + elf64_offsets[member];
1112 switch (e->e_ident[EI_DATA]) {
1114 val = be16dec(base);
1117 val = le16dec(base);
1120 errx(1, "invalid data format");
1124 errx(1, "invalid class");
1132 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
1137 switch (e->e_ident[EI_CLASS]) {
1139 base = (char *)base + elf32_offsets[member];
1140 switch (e->e_ident[EI_DATA]) {
1142 val = be16dec(base);
1145 val = le16dec(base);
1148 errx(1, "invalid data format");
1152 base = (char *)base + elf64_offsets[member];
1153 switch (e->e_ident[EI_DATA]) {
1155 val = be32dec(base);
1158 val = le32dec(base);
1161 errx(1, "invalid data format");
1165 errx(1, "invalid class");
1173 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1178 switch (e->e_ident[EI_CLASS]) {
1180 base = (char *)base + elf32_offsets[member];
1181 switch (e->e_ident[EI_DATA]) {
1183 val = be32dec(base);
1186 val = le32dec(base);
1189 errx(1, "invalid data format");
1193 base = (char *)base + elf64_offsets[member];
1194 switch (e->e_ident[EI_DATA]) {
1196 val = be32dec(base);
1199 val = le32dec(base);
1202 errx(1, "invalid data format");
1206 errx(1, "invalid class");
1213 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1218 switch (e->e_ident[EI_CLASS]) {
1220 base = (char *)base + elf32_offsets[member];
1221 switch (e->e_ident[EI_DATA]) {
1223 val = be32dec(base);
1226 val = le32dec(base);
1229 errx(1, "invalid data format");
1233 base = (char *)base + elf64_offsets[member];
1234 switch (e->e_ident[EI_DATA]) {
1236 val = be64dec(base);
1239 val = le64dec(base);
1242 errx(1, "invalid data format");
1246 errx(1, "invalid class");
1255 fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n");