xref: /freebsd/usr.bin/elfdump/elfdump.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*-
2  * Copyright (c) 2003 David O'Brien.  All rights reserved.
3  * Copyright (c) 2001 Jake Burkholder
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
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.
14  *
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
25  * SUCH DAMAGE.
26  */
27 
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30 
31 #include <sys/types.h>
32 #include <sys/elf32.h>
33 #include <sys/elf64.h>
34 #include <sys/endian.h>
35 #include <sys/mman.h>
36 #include <sys/stat.h>
37 #include <err.h>
38 #include <fcntl.h>
39 #include <inttypes.h>
40 #include <stddef.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <unistd.h>
45 
46 #define	ED_DYN		(1<<0)
47 #define	ED_EHDR		(1<<1)
48 #define	ED_GOT		(1<<2)
49 #define	ED_HASH		(1<<3)
50 #define	ED_INTERP	(1<<4)
51 #define	ED_NOTE		(1<<5)
52 #define	ED_PHDR		(1<<6)
53 #define	ED_REL		(1<<7)
54 #define	ED_SHDR		(1<<8)
55 #define	ED_SYMTAB	(1<<9)
56 #define	ED_ALL		((1<<10)-1)
57 
58 #define	elf_get_addr	elf_get_quad
59 #define	elf_get_off	elf_get_quad
60 #define	elf_get_size	elf_get_quad
61 
62 enum elf_member {
63 	D_TAG = 1, D_PTR, D_VAL,
64 
65 	E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY,
66 	E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE,
67 	E_SHNUM, E_SHSTRNDX,
68 
69 	N_NAMESZ, N_DESCSZ, N_TYPE,
70 
71 	P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS,
72 	P_ALIGN,
73 
74 	SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK,
75 	SH_INFO, SH_ADDRALIGN, SH_ENTSIZE,
76 
77 	ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX,
78 
79 	R_OFFSET, R_INFO,
80 
81 	RA_OFFSET, RA_INFO, RA_ADDEND
82 };
83 
84 typedef enum elf_member elf_member_t;
85 
86 int elf32_offsets[] = {
87 	0,
88 
89 	offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr),
90 	offsetof(Elf32_Dyn, d_un.d_val),
91 
92 	offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
93 	offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
94 	offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
95 	offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine),
96 	offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry),
97 	offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff),
98 	offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize),
99 	offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum),
100 	offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum),
101 	offsetof(Elf32_Ehdr, e_shstrndx),
102 
103 	offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
104 	offsetof(Elf_Note, n_type),
105 
106 	offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset),
107 	offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr),
108 	offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz),
109 	offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align),
110 
111 	offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type),
112 	offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr),
113 	offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size),
114 	offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info),
115 	offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize),
116 
117 	offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value),
118 	offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info),
119 	offsetof(Elf32_Sym, st_shndx),
120 
121 	offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info),
122 
123 	offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info),
124 	offsetof(Elf32_Rela, r_addend)
125 };
126 
127 int elf64_offsets[] = {
128 	0,
129 
130 	offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr),
131 	offsetof(Elf64_Dyn, d_un.d_val),
132 
133 	offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
134 	offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
135 	offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
136 	offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine),
137 	offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry),
138 	offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff),
139 	offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize),
140 	offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum),
141 	offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum),
142 	offsetof(Elf64_Ehdr, e_shstrndx),
143 
144 	offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
145 	offsetof(Elf_Note, n_type),
146 
147 	offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset),
148 	offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr),
149 	offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz),
150 	offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align),
151 
152 	offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type),
153 	offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr),
154 	offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size),
155 	offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info),
156 	offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize),
157 
158 	offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value),
159 	offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info),
160 	offsetof(Elf64_Sym, st_shndx),
161 
162 	offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info),
163 
164 	offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info),
165 	offsetof(Elf64_Rela, r_addend)
166 };
167 
168 /* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */
169 static const char *
170 d_tags(u_int64_t tag) {
171 	switch (tag) {
172 	case 0: return "DT_NULL";
173 	case 1: return "DT_NEEDED";
174 	case 2: return "DT_PLTRELSZ";
175 	case 3: return "DT_PLTGOT";
176 	case 4: return "DT_HASH";
177 	case 5: return "DT_STRTAB";
178 	case 6: return "DT_SYMTAB";
179 	case 7: return "DT_RELA";
180 	case 8: return "DT_RELASZ";
181 	case 9: return "DT_RELAENT";
182 	case 10: return "DT_STRSZ";
183 	case 11: return "DT_SYMENT";
184 	case 12: return "DT_INIT";
185 	case 13: return "DT_FINI";
186 	case 14: return "DT_SONAME";
187 	case 15: return "DT_RPATH";
188 	case 16: return "DT_SYMBOLIC";
189 	case 17: return "DT_REL";
190 	case 18: return "DT_RELSZ";
191 	case 19: return "DT_RELENT";
192 	case 20: return "DT_PLTREL";
193 	case 21: return "DT_DEBUG";
194 	case 22: return "DT_TEXTREL";
195 	case 23: return "DT_JMPREL";
196 	case 24: return "DT_BIND_NOW";
197 	case 25: return "DT_INIT_ARRAY";
198 	case 26: return "DT_FINI_ARRAY";
199 	case 27: return "DT_INIT_ARRAYSZ";
200 	case 28: return "DT_FINI_ARRAYSZ";
201 	case 29: return "DT_RUNPATH";
202 	case 30: return "DT_FLAGS";
203 	case 32: return "DT_PREINIT_ARRAY"; /* XXX: DT_ENCODING */
204 	case 33: return "DT_PREINIT_ARRAYSZ";
205 	/* 0x6000000D - 0x6ffff000 operating system-specific semantics */
206 	case 0x6ffffdf5: return "DT_GNU_PRELINKED";
207 	case 0x6ffffdf6: return "DT_GNU_CONFLICTSZ";
208 	case 0x6ffffdf7: return "DT_GNU_LIBLISTSZ";
209 	case 0x6ffffdf8: return "DT_SUNW_CHECKSUM";
210 	case 0x6ffffdf9: return "DT_PLTPADSZ";
211 	case 0x6ffffdfa: return "DT_MOVEENT";
212 	case 0x6ffffdfb: return "DT_MOVESZ";
213 	case 0x6ffffdfc: return "DT_FEATURE";
214 	case 0x6ffffdfd: return "DT_POSFLAG_1";
215 	case 0x6ffffdfe: return "DT_SYMINSZ";
216 	case 0x6ffffdff: return "DT_SYMINENT (DT_VALRNGHI)";
217 	case 0x6ffffe00: return "DT_ADDRRNGLO";
218 	case 0x6ffffef8: return "DT_GNU_CONFLICT";
219 	case 0x6ffffef9: return "DT_GNU_LIBLIST";
220 	case 0x6ffffefa: return "DT_SUNW_CONFIG";
221 	case 0x6ffffefb: return "DT_SUNW_DEPAUDIT";
222 	case 0x6ffffefc: return "DT_SUNW_AUDIT";
223 	case 0x6ffffefd: return "DT_SUNW_PLTPAD";
224 	case 0x6ffffefe: return "DT_SUNW_MOVETAB";
225 	case 0x6ffffeff: return "DT_SYMINFO (DT_ADDRRNGHI)";
226 	case 0x6ffffff9: return "DT_RELACOUNT";
227 	case 0x6ffffffa: return "DT_RELCOUNT";
228 	case 0x6ffffffb: return "DT_FLAGS_1";
229 	case 0x6ffffffc: return "DT_VERDEF";
230 	case 0x6ffffffd: return "DT_VERDEFNUM";
231 	case 0x6ffffffe: return "DT_VERNEED";
232 	case 0x6fffffff: return "DT_VERNEEDNUM";
233 	case 0x6ffffff0: return "DT_GNU_VERSYM";
234 	/* 0x70000000 - 0x7fffffff processor-specific semantics */
235 	case 0x70000000: return "DT_IA_64_PLT_RESERVE";
236 	case 0x7ffffffd: return "DT_SUNW_AUXILIARY";
237 	case 0x7ffffffe: return "DT_SUNW_USED";
238 	case 0x7fffffff: return "DT_SUNW_FILTER";
239 	default: return "ERROR: TAG NOT DEFINED";
240 	}
241 }
242 
243 static const char *
244 e_machines(u_int mach)
245 {
246 	static char machdesc[64];
247 
248 	switch (mach) {
249 	case EM_NONE:	return "EM_NONE";
250 	case EM_M32:	return "EM_M32";
251 	case EM_SPARC:	return "EM_SPARC";
252 	case EM_386:	return "EM_386";
253 	case EM_68K:	return "EM_68K";
254 	case EM_88K:	return "EM_88K";
255 	case EM_860:	return "EM_860";
256 	case EM_MIPS:	return "EM_MIPS";
257 	case EM_PPC:	return "EM_PPC";
258 	case EM_ARM:	return "EM_ARM";
259 	case EM_ALPHA:	return "EM_ALPHA (legacy)";
260 	case EM_SPARCV9:return "EM_SPARCV9";
261 	case EM_IA_64:	return "EM_IA_64";
262 	case EM_X86_64:	return "EM_X86_64";
263 	}
264 	snprintf(machdesc, sizeof(machdesc),
265 	    "(unknown machine) -- type 0x%x", mach);
266 	return (machdesc);
267 }
268 
269 const char *e_types[] = {
270 	"ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE"
271 };
272 
273 const char *ei_versions[] = {
274 	"EV_NONE", "EV_CURRENT"
275 };
276 
277 const char *ei_classes[] = {
278 	"ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
279 };
280 
281 const char *ei_data[] = {
282 	"ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
283 };
284 
285 const char *ei_abis[] = {
286 	"ELFOSABI_SYSV", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
287 	"ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS",
288 	"ELFOSABI_MONTEREY", "ELFOSABI_IRIX", "ELFOSABI_FREEBSD",
289 	"ELFOSABI_TRU64", "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD"
290 };
291 
292 const char *p_types[] = {
293 	"PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE",
294 	"PT_SHLIB", "PT_PHDR", "PT_TLS"
295 };
296 
297 const char *p_flags[] = {
298 	"", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R",
299 	"PF_X|PF_W|PF_R"
300 };
301 
302 /* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
303 static const char *
304 sh_types(u_int64_t sht) {
305 	switch (sht) {
306 	case 0:	return "SHT_NULL";
307 	case 1: return "SHT_PROGBITS";
308 	case 2: return "SHT_SYMTAB";
309 	case 3: return "SHT_STRTAB";
310 	case 4: return "SHT_RELA";
311 	case 5: return "SHT_HASH";
312 	case 6: return "SHT_DYNAMIC";
313 	case 7: return "SHT_NOTE";
314 	case 8: return "SHT_NOBITS";
315 	case 9: return "SHT_REL";
316 	case 10: return "SHT_SHLIB";
317 	case 11: return "SHT_DYNSYM";
318 	case 14: return "SHT_INIT_ARRAY";
319 	case 15: return "SHT_FINI_ARRAY";
320 	case 16: return "SHT_PREINIT_ARRAY";
321 	case 17: return "SHT_GROUP";
322 	case 18: return "SHT_SYMTAB_SHNDX";
323 	/* 0x60000000 - 0x6fffffff operating system-specific semantics */
324 	case 0x6ffffff0: return "XXX:VERSYM";
325 	case 0x6ffffff7: return "SHT_GNU_LIBLIST";
326 	case 0x6ffffffc: return "XXX:VERDEF";
327 	case 0x6ffffffd: return "SHT_SUNW(GNU)_verdef";
328 	case 0x6ffffffe: return "SHT_SUNW(GNU)_verneed";
329 	case 0x6fffffff: return "SHT_SUNW(GNU)_versym";
330 	/* 0x70000000 - 0x7fffffff processor-specific semantics */
331 	case 0x70000000: return "SHT_IA_64_EXT";
332 	case 0x70000001: return "SHT_IA_64_UNWIND";
333 	case 0x7ffffffd: return "XXX:AUXILIARY";
334 	case 0x7fffffff: return "XXX:FILTER";
335 	/* 0x80000000 - 0xffffffff application programs */
336 	default: return "ERROR: SHT NOT DEFINED";
337 	}
338 }
339 
340 const char *sh_flags[] = {
341 	"", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
342 	"SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
343 	"SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
344 };
345 
346 const char *st_types[] = {
347 	"STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE"
348 };
349 
350 const char *st_bindings[] = {
351 	"STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
352 };
353 
354 char *dynstr;
355 char *shstrtab;
356 char *strtab;
357 FILE *out;
358 
359 u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
360 u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member);
361 u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
362 u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
363 u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
364 
365 void elf_print_ehdr(Elf32_Ehdr *e);
366 void elf_print_phdr(Elf32_Ehdr *e, void *p);
367 void elf_print_shdr(Elf32_Ehdr *e, void *sh);
368 void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
369 void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
370 void elf_print_rel(Elf32_Ehdr *e, void *r);
371 void elf_print_rela(Elf32_Ehdr *e, void *ra);
372 void elf_print_interp(Elf32_Ehdr *e, void *p);
373 void elf_print_got(Elf32_Ehdr *e, void *sh);
374 void elf_print_hash(Elf32_Ehdr *e, void *sh);
375 void elf_print_note(Elf32_Ehdr *e, void *sh);
376 
377 void usage(void);
378 
379 int
380 main(int ac, char **av)
381 {
382 	u_int64_t phoff;
383 	u_int64_t shoff;
384 	u_int64_t phentsize;
385 	u_int64_t phnum;
386 	u_int64_t shentsize;
387 	u_int64_t shnum;
388 	u_int64_t shstrndx;
389 	u_int64_t offset;
390 	u_int64_t name;
391 	u_int64_t type;
392 	struct stat sb;
393 	u_int flags;
394 	Elf32_Ehdr *e;
395 	void *p;
396 	void *sh;
397 	void *v;
398 	int fd;
399 	int ch;
400 	int i;
401 
402 	out = stdout;
403 	flags = 0;
404 	while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1)
405 		switch (ch) {
406 		case 'a':
407 			flags = ED_ALL;
408 			break;
409 		case 'c':
410 			flags |= ED_SHDR;
411 			break;
412 		case 'd':
413 			flags |= ED_DYN;
414 			break;
415 		case 'e':
416 			flags |= ED_EHDR;
417 			break;
418 		case 'i':
419 			flags |= ED_INTERP;
420 			break;
421 		case 'G':
422 			flags |= ED_GOT;
423 			break;
424 		case 'h':
425 			flags |= ED_HASH;
426 			break;
427 		case 'n':
428 			flags |= ED_NOTE;
429 			break;
430 		case 'p':
431 			flags |= ED_PHDR;
432 			break;
433 		case 'r':
434 			flags |= ED_REL;
435 			break;
436 		case 's':
437 			flags |= ED_SYMTAB;
438 			break;
439 		case 'w':
440 			if ((out = fopen(optarg, "w")) == NULL)
441 				err(1, "%s", optarg);
442 			break;
443 		case '?':
444 		default:
445 			usage();
446 		}
447 	ac -= optind;
448 	av += optind;
449 	if (ac == 0 || flags == 0)
450 		usage();
451 	if ((fd = open(*av, O_RDONLY)) < 0 ||
452 	    fstat(fd, &sb) < 0)
453 		err(1, "%s", *av);
454 	e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
455 	if (e == MAP_FAILED)
456 		err(1, NULL);
457 	if (!IS_ELF(*(Elf32_Ehdr *)e))
458 		errx(1, "not an elf file");
459 	phoff = elf_get_off(e, e, E_PHOFF);
460 	shoff = elf_get_off(e, e, E_SHOFF);
461 	phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
462 	phnum = elf_get_quarter(e, e, E_PHNUM);
463 	shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
464 	shnum = elf_get_quarter(e, e, E_SHNUM);
465 	shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
466 	p = (char *)e + phoff;
467 	sh = (char *)e + shoff;
468 	offset = elf_get_off(e, (char *)sh + shstrndx * shentsize, SH_OFFSET);
469 	shstrtab = (char *)e + offset;
470 	for (i = 0; (u_int64_t)i < shnum; i++) {
471 		name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
472 		offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
473 		if (strcmp(shstrtab + name, ".strtab") == 0)
474 			strtab = (char *)e + offset;
475 		if (strcmp(shstrtab + name, ".dynstr") == 0)
476 			dynstr = (char *)e + offset;
477 	}
478 	if (flags & ED_EHDR)
479 		elf_print_ehdr(e);
480 	if (flags & ED_PHDR)
481 		elf_print_phdr(e, p);
482 	if (flags & ED_SHDR)
483 		elf_print_shdr(e, sh);
484 	for (i = 0; (u_int64_t)i < phnum; i++) {
485 		v = (char *)p + i * phentsize;
486 		type = elf_get_word(e, v, P_TYPE);
487 		switch (type) {
488 		case PT_INTERP:
489 			if (flags & ED_INTERP)
490 				elf_print_interp(e, v);
491 			break;
492 		case PT_NULL:
493 		case PT_LOAD:
494 		case PT_DYNAMIC:
495 		case PT_NOTE:
496 		case PT_SHLIB:
497 		case PT_PHDR:
498 			break;
499 		}
500 	}
501 	for (i = 0; (u_int64_t)i < shnum; i++) {
502 		v = (char *)sh + i * shentsize;
503 		type = elf_get_word(e, v, SH_TYPE);
504 		switch (type) {
505 		case SHT_SYMTAB:
506 			if (flags & ED_SYMTAB)
507 				elf_print_symtab(e, v, strtab);
508 			break;
509 		case SHT_DYNAMIC:
510 			if (flags & ED_DYN)
511 				elf_print_dynamic(e, v);
512 			break;
513 		case SHT_RELA:
514 			if (flags & ED_REL)
515 				elf_print_rela(e, v);
516 			break;
517 		case SHT_REL:
518 			if (flags & ED_REL)
519 				elf_print_rel(e, v);
520 			break;
521 		case SHT_NOTE:
522 			name = elf_get_word(e, v, SH_NAME);
523 			if (flags & ED_NOTE &&
524 			    strcmp(shstrtab + name, ".note.ABI-tag") == 0)
525 				elf_print_note(e, v);
526 			break;
527 		case SHT_DYNSYM:
528 			if (flags & ED_SYMTAB)
529 				elf_print_symtab(e, v, dynstr);
530 			break;
531 		case SHT_PROGBITS:
532 			name = elf_get_word(e, v, SH_NAME);
533 			if (flags & ED_GOT &&
534 			    strcmp(shstrtab + name, ".got") == 0)
535 				elf_print_got(e, v);
536 			break;
537 		case SHT_HASH:
538 			if (flags & ED_HASH)
539 				elf_print_hash(e, v);
540 			break;
541 		case SHT_NULL:
542 		case SHT_STRTAB:
543 		case SHT_NOBITS:
544 		case SHT_SHLIB:
545 			break;
546 		}
547 	}
548 
549 	return 0;
550 }
551 
552 void
553 elf_print_ehdr(Elf32_Ehdr *e)
554 {
555 	u_int64_t class;
556 	u_int64_t data;
557 	u_int64_t osabi;
558 	u_int64_t type;
559 	u_int64_t machine;
560 	u_int64_t version;
561 	u_int64_t entry;
562 	u_int64_t phoff;
563 	u_int64_t shoff;
564 	u_int64_t flags;
565 	u_int64_t ehsize;
566 	u_int64_t phentsize;
567 	u_int64_t phnum;
568 	u_int64_t shentsize;
569 	u_int64_t shnum;
570 	u_int64_t shstrndx;
571 
572 	class = elf_get_byte(e, e, E_CLASS);
573 	data = elf_get_byte(e, e, E_DATA);
574 	osabi = elf_get_byte(e, e, E_OSABI);
575 	type = elf_get_quarter(e, e, E_TYPE);
576 	machine = elf_get_quarter(e, e, E_MACHINE);
577 	version = elf_get_word(e, e, E_VERSION);
578 	entry = elf_get_addr(e, e, E_ENTRY);
579 	phoff = elf_get_off(e, e, E_PHOFF);
580 	shoff = elf_get_off(e, e, E_SHOFF);
581 	flags = elf_get_word(e, e, E_FLAGS);
582 	ehsize = elf_get_quarter(e, e, E_EHSIZE);
583 	phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
584 	phnum = elf_get_quarter(e, e, E_PHNUM);
585 	shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
586 	shnum = elf_get_quarter(e, e, E_SHNUM);
587 	shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
588 	fprintf(out, "\nelf header:\n");
589 	fprintf(out, "\n");
590 	fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
591 	    ei_abis[osabi]);
592 	fprintf(out, "\te_type: %s\n", e_types[type]);
593 	fprintf(out, "\te_machine: %s\n", e_machines(machine));
594 	fprintf(out, "\te_version: %s\n", ei_versions[version]);
595 	fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
596 	fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
597 	fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
598 	fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
599 	fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
600 	fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
601 	fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
602 	fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
603 	fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
604 	fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
605 }
606 
607 void
608 elf_print_phdr(Elf32_Ehdr *e, void *p)
609 {
610 	u_int64_t phentsize;
611 	u_int64_t phnum;
612 	u_int64_t type;
613 	u_int64_t offset;
614 	u_int64_t vaddr;
615 	u_int64_t paddr;
616 	u_int64_t filesz;
617 	u_int64_t memsz;
618 	u_int64_t flags;
619 	u_int64_t align;
620 	void *v;
621 	int i;
622 
623 	phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
624 	phnum = elf_get_quarter(e, e, E_PHNUM);
625 	fprintf(out, "\nprogram header:\n");
626 	for (i = 0; (u_int64_t)i < phnum; i++) {
627 		v = (char *)p + i * phentsize;
628 		type = elf_get_word(e, v, P_TYPE);
629 		offset = elf_get_off(e, v, P_OFFSET);
630 		vaddr = elf_get_addr(e, v, P_VADDR);
631 		paddr = elf_get_addr(e, v, P_PADDR);
632 		filesz = elf_get_size(e, v, P_FILESZ);
633 		memsz = elf_get_size(e, v, P_MEMSZ);
634 		flags = elf_get_word(e, v, P_FLAGS);
635 		align = elf_get_size(e, v, P_ALIGN);
636 		fprintf(out, "\n");
637 		fprintf(out, "entry: %d\n", i);
638 		fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
639 		fprintf(out, "\tp_offset: %jd\n", (intmax_t)offset);
640 		fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
641 		fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
642 		fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
643 		fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
644 		fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
645 		fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
646 	}
647 }
648 
649 void
650 elf_print_shdr(Elf32_Ehdr *e, void *sh)
651 {
652 	u_int64_t shentsize;
653 	u_int64_t shnum;
654 	u_int64_t name;
655 	u_int64_t type;
656 	u_int64_t flags;
657 	u_int64_t addr;
658 	u_int64_t offset;
659 	u_int64_t size;
660 	u_int64_t shlink;
661 	u_int64_t info;
662 	u_int64_t addralign;
663 	u_int64_t entsize;
664 	void *v;
665 	int i;
666 
667 	shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
668 	shnum = elf_get_quarter(e, e, E_SHNUM);
669 	fprintf(out, "\nsection header:\n");
670 	for (i = 0; (u_int64_t)i < shnum; i++) {
671 		v = (char *)sh + i * shentsize;
672 		name = elf_get_word(e, v, SH_NAME);
673 		type = elf_get_word(e, v, SH_TYPE);
674 		flags = elf_get_word(e, v, SH_FLAGS);
675 		addr = elf_get_addr(e, v, SH_ADDR);
676 		offset = elf_get_off(e, v, SH_OFFSET);
677 		size = elf_get_size(e, v, SH_SIZE);
678 		shlink = elf_get_word(e, v, SH_LINK);
679 		info = elf_get_word(e, v, SH_INFO);
680 		addralign = elf_get_size(e, v, SH_ADDRALIGN);
681 		entsize = elf_get_size(e, v, SH_ENTSIZE);
682 		fprintf(out, "\n");
683 		fprintf(out, "entry: %d\n", i);
684 		fprintf(out, "\tsh_name: %s\n", shstrtab + name);
685 		fprintf(out, "\tsh_type: %s\n", sh_types(type));
686 		fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
687 		fprintf(out, "\tsh_addr: %#jx\n", addr);
688 		fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
689 		fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
690 		fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
691 		fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
692 		fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
693 		fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
694 	}
695 }
696 
697 void
698 elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
699 {
700 	u_int64_t offset;
701 	u_int64_t entsize;
702 	u_int64_t size;
703 	u_int64_t name;
704 	u_int64_t value;
705 	u_int64_t info;
706 	u_int64_t shndx;
707 	void *st;
708 	int len;
709 	int i;
710 
711 	offset = elf_get_off(e, sh, SH_OFFSET);
712 	entsize = elf_get_size(e, sh, SH_ENTSIZE);
713 	size = elf_get_size(e, sh, SH_SIZE);
714 	name = elf_get_word(e, sh, SH_NAME);
715 	len = size / entsize;
716 	fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
717 	for (i = 0; i < len; i++) {
718 		st = (char *)e + offset + i * entsize;
719 		name = elf_get_word(e, st, ST_NAME);
720 		value = elf_get_addr(e, st, ST_VALUE);
721 		size = elf_get_size(e, st, ST_SIZE);
722 		info = elf_get_byte(e, st, ST_INFO);
723 		shndx = elf_get_quarter(e, st, ST_SHNDX);
724 		fprintf(out, "\n");
725 		fprintf(out, "entry: %d\n", i);
726 		fprintf(out, "\tst_name: %s\n", str + name);
727 		fprintf(out, "\tst_value: %#jx\n", value);
728 		fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
729 		fprintf(out, "\tst_info: %s %s\n",
730 		    st_types[ELF32_ST_TYPE(info)],
731 		    st_bindings[ELF32_ST_BIND(info)]);
732 		fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
733 	}
734 }
735 
736 void
737 elf_print_dynamic(Elf32_Ehdr *e, void *sh)
738 {
739 	u_int64_t offset;
740 	u_int64_t entsize;
741 	u_int64_t size;
742 	int64_t tag;
743 	u_int64_t ptr;
744 	u_int64_t val;
745 	void *d;
746 	int i;
747 
748 	offset = elf_get_off(e, sh, SH_OFFSET);
749 	entsize = elf_get_size(e, sh, SH_ENTSIZE);
750 	size = elf_get_size(e, sh, SH_SIZE);
751 	fprintf(out, "\ndynamic:\n");
752 	for (i = 0; (u_int64_t)i < size / entsize; i++) {
753 		d = (char *)e + offset + i * entsize;
754 		tag = elf_get_size(e, d, D_TAG);
755 		ptr = elf_get_size(e, d, D_PTR);
756 		val = elf_get_addr(e, d, D_VAL);
757 		fprintf(out, "\n");
758 		fprintf(out, "entry: %d\n", i);
759 		fprintf(out, "\td_tag: %s\n", d_tags(tag));
760 		switch (tag) {
761 		case DT_NEEDED:
762 		case DT_SONAME:
763 		case DT_RPATH:
764 			fprintf(out, "\td_val: %s\n", dynstr + val);
765 			break;
766 		case DT_PLTRELSZ:
767 		case DT_RELA:
768 		case DT_RELASZ:
769 		case DT_RELAENT:
770 		case DT_STRSZ:
771 		case DT_SYMENT:
772 		case DT_RELSZ:
773 		case DT_RELENT:
774 		case DT_PLTREL:
775 			fprintf(out, "\td_val: %jd\n", (intmax_t)val);
776 			break;
777 		case DT_PLTGOT:
778 		case DT_HASH:
779 		case DT_STRTAB:
780 		case DT_SYMTAB:
781 		case DT_INIT:
782 		case DT_FINI:
783 		case DT_REL:
784 		case DT_JMPREL:
785 			fprintf(out, "\td_ptr: %#jx\n", ptr);
786 			break;
787 		case DT_NULL:
788 		case DT_SYMBOLIC:
789 		case DT_DEBUG:
790 		case DT_TEXTREL:
791 			break;
792 		}
793 	}
794 }
795 
796 void
797 elf_print_rela(Elf32_Ehdr *e, void *sh)
798 {
799 	u_int64_t offset;
800 	u_int64_t entsize;
801 	u_int64_t size;
802 	u_int64_t name;
803 	u_int64_t info;
804 	int64_t addend;
805 	void *ra;
806 	void *v;
807 	int i;
808 
809 	offset = elf_get_off(e, sh, SH_OFFSET);
810 	entsize = elf_get_size(e, sh, SH_ENTSIZE);
811 	size = elf_get_size(e, sh, SH_SIZE);
812 	name = elf_get_word(e, sh, SH_NAME);
813 	v = (char *)e + offset;
814 	fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
815 	for (i = 0; (u_int64_t)i < size / entsize; i++) {
816 		ra = (char *)v + i * entsize;
817 		offset = elf_get_addr(e, ra, RA_OFFSET);
818 		info = elf_get_word(e, ra, RA_INFO);
819 		addend = elf_get_off(e, ra, RA_ADDEND);
820 		fprintf(out, "\n");
821 		fprintf(out, "entry: %d\n", i);
822 		fprintf(out, "\tr_offset: %#jx\n", offset);
823 		fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
824 		fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
825 	}
826 }
827 
828 void
829 elf_print_rel(Elf32_Ehdr *e, void *sh)
830 {
831 	u_int64_t offset;
832 	u_int64_t entsize;
833 	u_int64_t size;
834 	u_int64_t name;
835 	u_int64_t info;
836 	void *r;
837 	void *v;
838 	int i;
839 
840 	offset = elf_get_off(e, sh, SH_OFFSET);
841 	entsize = elf_get_size(e, sh, SH_ENTSIZE);
842 	size = elf_get_size(e, sh, SH_SIZE);
843 	name = elf_get_word(e, sh, SH_NAME);
844 	v = (char *)e + offset;
845 	fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
846 	for (i = 0; (u_int64_t)i < size / entsize; i++) {
847 		r = (char *)v + i * entsize;
848 		offset = elf_get_addr(e, r, R_OFFSET);
849 		info = elf_get_word(e, r, R_INFO);
850 		fprintf(out, "\n");
851 		fprintf(out, "entry: %d\n", i);
852 		fprintf(out, "\tr_offset: %#jx\n", offset);
853 		fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
854 	}
855 }
856 
857 void
858 elf_print_interp(Elf32_Ehdr *e, void *p)
859 {
860 	u_int64_t offset;
861 	char *s;
862 
863 	offset = elf_get_off(e, p, P_OFFSET);
864 	s = (char *)e + offset;
865 	fprintf(out, "\ninterp:\n");
866 	fprintf(out, "\t%s\n", s);
867 }
868 
869 void
870 elf_print_got(Elf32_Ehdr *e, void *sh)
871 {
872 	u_int64_t offset;
873 	u_int64_t addralign;
874 	u_int64_t size;
875 	u_int64_t addr;
876 	void *v;
877 	int i;
878 
879 	offset = elf_get_off(e, sh, SH_OFFSET);
880 	addralign = elf_get_size(e, sh, SH_ADDRALIGN);
881 	size = elf_get_size(e, sh, SH_SIZE);
882 	v = (char *)e + offset;
883 	fprintf(out, "\nglobal offset table:\n");
884 	for (i = 0; (u_int64_t)i < size / addralign; i++) {
885 		addr = elf_get_addr(e, (char *)v + i * addralign, 0);
886 		fprintf(out, "\n");
887 		fprintf(out, "entry: %d\n", i);
888 		fprintf(out, "\t%#jx\n", addr);
889 	}
890 }
891 
892 void
893 elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
894 {
895 }
896 
897 void
898 elf_print_note(Elf32_Ehdr *e, void *sh)
899 {
900 	u_int64_t offset;
901 	u_int64_t size;
902 	u_int64_t name;
903 	u_int32_t namesz;
904 	u_int32_t descsz;
905 	u_int32_t type;
906 	u_int32_t desc;
907 	char *n, *s;
908 
909 	offset = elf_get_off(e, sh, SH_OFFSET);
910 	size = elf_get_size(e, sh, SH_SIZE);
911 	name = elf_get_word(e, sh, SH_NAME);
912 	n = (char *)e + offset;
913 	fprintf(out, "\nnote (%s):\n", shstrtab + name);
914  	while (n < ((char *)e + offset + size)) {
915 		namesz = elf_get_word(e, n, N_NAMESZ);
916 		descsz = elf_get_word(e, n, N_DESCSZ);
917 		type = elf_get_word(e, n, N_TYPE);
918  		s = n + sizeof(Elf_Note);
919  		desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
920 		fprintf(out, "\t%s %d\n", s, desc);
921 		n += sizeof(Elf_Note) + namesz + descsz;
922 	}
923 }
924 
925 u_int64_t
926 elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
927 {
928 	u_int64_t val;
929 
930 	val = 0;
931 	switch (e->e_ident[EI_CLASS]) {
932 	case ELFCLASS32:
933 		val = ((char *)base)[elf32_offsets[member]];
934 		break;
935 	case ELFCLASS64:
936 		val = ((char *)base)[elf64_offsets[member]];
937 		break;
938 	case ELFCLASSNONE:
939 		errx(1, "invalid class");
940 	}
941 
942 	return val;
943 }
944 
945 u_int64_t
946 elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
947 {
948 	u_int64_t val;
949 
950 	val = 0;
951 	switch (e->e_ident[EI_CLASS]) {
952 	case ELFCLASS32:
953 		base = (char *)base + elf32_offsets[member];
954 		switch (e->e_ident[EI_DATA]) {
955 		case ELFDATA2MSB:
956 			val = be16dec(base);
957 			break;
958 		case ELFDATA2LSB:
959 			val = le16dec(base);
960 			break;
961 		case ELFDATANONE:
962 			errx(1, "invalid data format");
963 		}
964 		break;
965 	case ELFCLASS64:
966 		base = (char *)base + elf64_offsets[member];
967 		switch (e->e_ident[EI_DATA]) {
968 		case ELFDATA2MSB:
969 			val = be16dec(base);
970 			break;
971 		case ELFDATA2LSB:
972 			val = le16dec(base);
973 			break;
974 		case ELFDATANONE:
975 			errx(1, "invalid data format");
976 		}
977 		break;
978 	case ELFCLASSNONE:
979 		errx(1, "invalid class");
980 	}
981 
982 	return val;
983 }
984 
985 u_int64_t
986 elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
987 {
988 	u_int64_t val;
989 
990 	val = 0;
991 	switch (e->e_ident[EI_CLASS]) {
992 	case ELFCLASS32:
993 		base = (char *)base + elf32_offsets[member];
994 		switch (e->e_ident[EI_DATA]) {
995 		case ELFDATA2MSB:
996 			val = be16dec(base);
997 			break;
998 		case ELFDATA2LSB:
999 			val = le16dec(base);
1000 			break;
1001 		case ELFDATANONE:
1002 			errx(1, "invalid data format");
1003 		}
1004 		break;
1005 	case ELFCLASS64:
1006 		base = (char *)base + elf64_offsets[member];
1007 		switch (e->e_ident[EI_DATA]) {
1008 		case ELFDATA2MSB:
1009 			val = be32dec(base);
1010 			break;
1011 		case ELFDATA2LSB:
1012 			val = le32dec(base);
1013 			break;
1014 		case ELFDATANONE:
1015 			errx(1, "invalid data format");
1016 		}
1017 		break;
1018 	case ELFCLASSNONE:
1019 		errx(1, "invalid class");
1020 	}
1021 
1022 	return val;
1023 }
1024 
1025 u_int64_t
1026 elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
1027 {
1028 	u_int64_t val;
1029 
1030 	val = 0;
1031 	switch (e->e_ident[EI_CLASS]) {
1032 	case ELFCLASS32:
1033 		base = (char *)base + elf32_offsets[member];
1034 		switch (e->e_ident[EI_DATA]) {
1035 		case ELFDATA2MSB:
1036 			val = be32dec(base);
1037 			break;
1038 		case ELFDATA2LSB:
1039 			val = le32dec(base);
1040 			break;
1041 		case ELFDATANONE:
1042 			errx(1, "invalid data format");
1043 		}
1044 		break;
1045 	case ELFCLASS64:
1046 		base = (char *)base + elf64_offsets[member];
1047 		switch (e->e_ident[EI_DATA]) {
1048 		case ELFDATA2MSB:
1049 			val = be32dec(base);
1050 			break;
1051 		case ELFDATA2LSB:
1052 			val = le32dec(base);
1053 			break;
1054 		case ELFDATANONE:
1055 			errx(1, "invalid data format");
1056 		}
1057 		break;
1058 	case ELFCLASSNONE:
1059 		errx(1, "invalid class");
1060 	}
1061 
1062 	return val;
1063 }
1064 
1065 u_int64_t
1066 elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
1067 {
1068 	u_int64_t val;
1069 
1070 	val = 0;
1071 	switch (e->e_ident[EI_CLASS]) {
1072 	case ELFCLASS32:
1073 		base = (char *)base + elf32_offsets[member];
1074 		switch (e->e_ident[EI_DATA]) {
1075 		case ELFDATA2MSB:
1076 			val = be32dec(base);
1077 			break;
1078 		case ELFDATA2LSB:
1079 			val = le32dec(base);
1080 			break;
1081 		case ELFDATANONE:
1082 			errx(1, "invalid data format");
1083 		}
1084 		break;
1085 	case ELFCLASS64:
1086 		base = (char *)base + elf64_offsets[member];
1087 		switch (e->e_ident[EI_DATA]) {
1088 		case ELFDATA2MSB:
1089 			val = be64dec(base);
1090 			break;
1091 		case ELFDATA2LSB:
1092 			val = le64dec(base);
1093 			break;
1094 		case ELFDATANONE:
1095 			errx(1, "invalid data format");
1096 		}
1097 		break;
1098 	case ELFCLASSNONE:
1099 		errx(1, "invalid class");
1100 	}
1101 
1102 	return val;
1103 }
1104 
1105 void
1106 usage(void)
1107 {
1108 	fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n");
1109 	exit(1);
1110 }
1111