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