1 #include <stdio.h>
2 #include <stdarg.h>
3 #include <stdlib.h>
4 #include <stdint.h>
5 #include <string.h>
6 #include <errno.h>
7 #include <unistd.h>
8 #include <elf.h>
9 #include <byteswap.h>
10 #define USE_BSD
11 #include <endian.h>
12 #include <regex.h>
13
14 static void die(char *fmt, ...);
15
16 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
17 static Elf32_Ehdr ehdr;
18 static unsigned long reloc_count, reloc_idx;
19 static unsigned long *relocs;
20
21 struct section {
22 Elf32_Shdr shdr;
23 struct section *link;
24 Elf32_Sym *symtab;
25 Elf32_Rel *reltab;
26 char *strtab;
27 };
28 static struct section *secs;
29
30 /*
31 * Following symbols have been audited. There values are constant and do
32 * not change if bzImage is loaded at a different physical address than
33 * the address for which it has been compiled. Don't warn user about
34 * absolute relocations present w.r.t these symbols.
35 */
36 static const char abs_sym_regex[] =
37 "^(xen_irq_disable_direct_reloc$|"
38 "xen_save_fl_direct_reloc$|"
39 "VDSO|"
40 "__crc_)";
41 static regex_t abs_sym_regex_c;
is_abs_reloc(const char * sym_name)42 static int is_abs_reloc(const char *sym_name)
43 {
44 return !regexec(&abs_sym_regex_c, sym_name, 0, NULL, 0);
45 }
46
47 /*
48 * These symbols are known to be relative, even if the linker marks them
49 * as absolute (typically defined outside any section in the linker script.)
50 */
51 static const char rel_sym_regex[] =
52 "^_end$";
53 static regex_t rel_sym_regex_c;
is_rel_reloc(const char * sym_name)54 static int is_rel_reloc(const char *sym_name)
55 {
56 return !regexec(&rel_sym_regex_c, sym_name, 0, NULL, 0);
57 }
58
regex_init(void)59 static void regex_init(void)
60 {
61 char errbuf[128];
62 int err;
63
64 err = regcomp(&abs_sym_regex_c, abs_sym_regex,
65 REG_EXTENDED|REG_NOSUB);
66 if (err) {
67 regerror(err, &abs_sym_regex_c, errbuf, sizeof errbuf);
68 die("%s", errbuf);
69 }
70
71 err = regcomp(&rel_sym_regex_c, rel_sym_regex,
72 REG_EXTENDED|REG_NOSUB);
73 if (err) {
74 regerror(err, &rel_sym_regex_c, errbuf, sizeof errbuf);
75 die("%s", errbuf);
76 }
77 }
78
die(char * fmt,...)79 static void die(char *fmt, ...)
80 {
81 va_list ap;
82 va_start(ap, fmt);
83 vfprintf(stderr, fmt, ap);
84 va_end(ap);
85 exit(1);
86 }
87
sym_type(unsigned type)88 static const char *sym_type(unsigned type)
89 {
90 static const char *type_name[] = {
91 #define SYM_TYPE(X) [X] = #X
92 SYM_TYPE(STT_NOTYPE),
93 SYM_TYPE(STT_OBJECT),
94 SYM_TYPE(STT_FUNC),
95 SYM_TYPE(STT_SECTION),
96 SYM_TYPE(STT_FILE),
97 SYM_TYPE(STT_COMMON),
98 SYM_TYPE(STT_TLS),
99 #undef SYM_TYPE
100 };
101 const char *name = "unknown sym type name";
102 if (type < ARRAY_SIZE(type_name)) {
103 name = type_name[type];
104 }
105 return name;
106 }
107
sym_bind(unsigned bind)108 static const char *sym_bind(unsigned bind)
109 {
110 static const char *bind_name[] = {
111 #define SYM_BIND(X) [X] = #X
112 SYM_BIND(STB_LOCAL),
113 SYM_BIND(STB_GLOBAL),
114 SYM_BIND(STB_WEAK),
115 #undef SYM_BIND
116 };
117 const char *name = "unknown sym bind name";
118 if (bind < ARRAY_SIZE(bind_name)) {
119 name = bind_name[bind];
120 }
121 return name;
122 }
123
sym_visibility(unsigned visibility)124 static const char *sym_visibility(unsigned visibility)
125 {
126 static const char *visibility_name[] = {
127 #define SYM_VISIBILITY(X) [X] = #X
128 SYM_VISIBILITY(STV_DEFAULT),
129 SYM_VISIBILITY(STV_INTERNAL),
130 SYM_VISIBILITY(STV_HIDDEN),
131 SYM_VISIBILITY(STV_PROTECTED),
132 #undef SYM_VISIBILITY
133 };
134 const char *name = "unknown sym visibility name";
135 if (visibility < ARRAY_SIZE(visibility_name)) {
136 name = visibility_name[visibility];
137 }
138 return name;
139 }
140
rel_type(unsigned type)141 static const char *rel_type(unsigned type)
142 {
143 static const char *type_name[] = {
144 #define REL_TYPE(X) [X] = #X
145 REL_TYPE(R_386_NONE),
146 REL_TYPE(R_386_32),
147 REL_TYPE(R_386_PC32),
148 REL_TYPE(R_386_GOT32),
149 REL_TYPE(R_386_PLT32),
150 REL_TYPE(R_386_COPY),
151 REL_TYPE(R_386_GLOB_DAT),
152 REL_TYPE(R_386_JMP_SLOT),
153 REL_TYPE(R_386_RELATIVE),
154 REL_TYPE(R_386_GOTOFF),
155 REL_TYPE(R_386_GOTPC),
156 #undef REL_TYPE
157 };
158 const char *name = "unknown type rel type name";
159 if (type < ARRAY_SIZE(type_name) && type_name[type]) {
160 name = type_name[type];
161 }
162 return name;
163 }
164
sec_name(unsigned shndx)165 static const char *sec_name(unsigned shndx)
166 {
167 const char *sec_strtab;
168 const char *name;
169 sec_strtab = secs[ehdr.e_shstrndx].strtab;
170 name = "<noname>";
171 if (shndx < ehdr.e_shnum) {
172 name = sec_strtab + secs[shndx].shdr.sh_name;
173 }
174 else if (shndx == SHN_ABS) {
175 name = "ABSOLUTE";
176 }
177 else if (shndx == SHN_COMMON) {
178 name = "COMMON";
179 }
180 return name;
181 }
182
sym_name(const char * sym_strtab,Elf32_Sym * sym)183 static const char *sym_name(const char *sym_strtab, Elf32_Sym *sym)
184 {
185 const char *name;
186 name = "<noname>";
187 if (sym->st_name) {
188 name = sym_strtab + sym->st_name;
189 }
190 else {
191 name = sec_name(secs[sym->st_shndx].shdr.sh_name);
192 }
193 return name;
194 }
195
196
197
198 #if BYTE_ORDER == LITTLE_ENDIAN
199 #define le16_to_cpu(val) (val)
200 #define le32_to_cpu(val) (val)
201 #endif
202 #if BYTE_ORDER == BIG_ENDIAN
203 #define le16_to_cpu(val) bswap_16(val)
204 #define le32_to_cpu(val) bswap_32(val)
205 #endif
206
elf16_to_cpu(uint16_t val)207 static uint16_t elf16_to_cpu(uint16_t val)
208 {
209 return le16_to_cpu(val);
210 }
211
elf32_to_cpu(uint32_t val)212 static uint32_t elf32_to_cpu(uint32_t val)
213 {
214 return le32_to_cpu(val);
215 }
216
read_ehdr(FILE * fp)217 static void read_ehdr(FILE *fp)
218 {
219 if (fread(&ehdr, sizeof(ehdr), 1, fp) != 1) {
220 die("Cannot read ELF header: %s\n",
221 strerror(errno));
222 }
223 if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) {
224 die("No ELF magic\n");
225 }
226 if (ehdr.e_ident[EI_CLASS] != ELFCLASS32) {
227 die("Not a 32 bit executable\n");
228 }
229 if (ehdr.e_ident[EI_DATA] != ELFDATA2LSB) {
230 die("Not a LSB ELF executable\n");
231 }
232 if (ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
233 die("Unknown ELF version\n");
234 }
235 /* Convert the fields to native endian */
236 ehdr.e_type = elf16_to_cpu(ehdr.e_type);
237 ehdr.e_machine = elf16_to_cpu(ehdr.e_machine);
238 ehdr.e_version = elf32_to_cpu(ehdr.e_version);
239 ehdr.e_entry = elf32_to_cpu(ehdr.e_entry);
240 ehdr.e_phoff = elf32_to_cpu(ehdr.e_phoff);
241 ehdr.e_shoff = elf32_to_cpu(ehdr.e_shoff);
242 ehdr.e_flags = elf32_to_cpu(ehdr.e_flags);
243 ehdr.e_ehsize = elf16_to_cpu(ehdr.e_ehsize);
244 ehdr.e_phentsize = elf16_to_cpu(ehdr.e_phentsize);
245 ehdr.e_phnum = elf16_to_cpu(ehdr.e_phnum);
246 ehdr.e_shentsize = elf16_to_cpu(ehdr.e_shentsize);
247 ehdr.e_shnum = elf16_to_cpu(ehdr.e_shnum);
248 ehdr.e_shstrndx = elf16_to_cpu(ehdr.e_shstrndx);
249
250 if ((ehdr.e_type != ET_EXEC) && (ehdr.e_type != ET_DYN)) {
251 die("Unsupported ELF header type\n");
252 }
253 if (ehdr.e_machine != EM_386) {
254 die("Not for x86\n");
255 }
256 if (ehdr.e_version != EV_CURRENT) {
257 die("Unknown ELF version\n");
258 }
259 if (ehdr.e_ehsize != sizeof(Elf32_Ehdr)) {
260 die("Bad Elf header size\n");
261 }
262 if (ehdr.e_phentsize != sizeof(Elf32_Phdr)) {
263 die("Bad program header entry\n");
264 }
265 if (ehdr.e_shentsize != sizeof(Elf32_Shdr)) {
266 die("Bad section header entry\n");
267 }
268 if (ehdr.e_shstrndx >= ehdr.e_shnum) {
269 die("String table index out of bounds\n");
270 }
271 }
272
read_shdrs(FILE * fp)273 static void read_shdrs(FILE *fp)
274 {
275 int i;
276 Elf32_Shdr shdr;
277
278 secs = calloc(ehdr.e_shnum, sizeof(struct section));
279 if (!secs) {
280 die("Unable to allocate %d section headers\n",
281 ehdr.e_shnum);
282 }
283 if (fseek(fp, ehdr.e_shoff, SEEK_SET) < 0) {
284 die("Seek to %d failed: %s\n",
285 ehdr.e_shoff, strerror(errno));
286 }
287 for (i = 0; i < ehdr.e_shnum; i++) {
288 struct section *sec = &secs[i];
289 if (fread(&shdr, sizeof shdr, 1, fp) != 1)
290 die("Cannot read ELF section headers %d/%d: %s\n",
291 i, ehdr.e_shnum, strerror(errno));
292 sec->shdr.sh_name = elf32_to_cpu(shdr.sh_name);
293 sec->shdr.sh_type = elf32_to_cpu(shdr.sh_type);
294 sec->shdr.sh_flags = elf32_to_cpu(shdr.sh_flags);
295 sec->shdr.sh_addr = elf32_to_cpu(shdr.sh_addr);
296 sec->shdr.sh_offset = elf32_to_cpu(shdr.sh_offset);
297 sec->shdr.sh_size = elf32_to_cpu(shdr.sh_size);
298 sec->shdr.sh_link = elf32_to_cpu(shdr.sh_link);
299 sec->shdr.sh_info = elf32_to_cpu(shdr.sh_info);
300 sec->shdr.sh_addralign = elf32_to_cpu(shdr.sh_addralign);
301 sec->shdr.sh_entsize = elf32_to_cpu(shdr.sh_entsize);
302 if (sec->shdr.sh_link < ehdr.e_shnum)
303 sec->link = &secs[sec->shdr.sh_link];
304 }
305
306 }
307
read_strtabs(FILE * fp)308 static void read_strtabs(FILE *fp)
309 {
310 int i;
311 for (i = 0; i < ehdr.e_shnum; i++) {
312 struct section *sec = &secs[i];
313 if (sec->shdr.sh_type != SHT_STRTAB) {
314 continue;
315 }
316 sec->strtab = malloc(sec->shdr.sh_size);
317 if (!sec->strtab) {
318 die("malloc of %d bytes for strtab failed\n",
319 sec->shdr.sh_size);
320 }
321 if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
322 die("Seek to %d failed: %s\n",
323 sec->shdr.sh_offset, strerror(errno));
324 }
325 if (fread(sec->strtab, 1, sec->shdr.sh_size, fp)
326 != sec->shdr.sh_size) {
327 die("Cannot read symbol table: %s\n",
328 strerror(errno));
329 }
330 }
331 }
332
read_symtabs(FILE * fp)333 static void read_symtabs(FILE *fp)
334 {
335 int i,j;
336 for (i = 0; i < ehdr.e_shnum; i++) {
337 struct section *sec = &secs[i];
338 if (sec->shdr.sh_type != SHT_SYMTAB) {
339 continue;
340 }
341 sec->symtab = malloc(sec->shdr.sh_size);
342 if (!sec->symtab) {
343 die("malloc of %d bytes for symtab failed\n",
344 sec->shdr.sh_size);
345 }
346 if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
347 die("Seek to %d failed: %s\n",
348 sec->shdr.sh_offset, strerror(errno));
349 }
350 if (fread(sec->symtab, 1, sec->shdr.sh_size, fp)
351 != sec->shdr.sh_size) {
352 die("Cannot read symbol table: %s\n",
353 strerror(errno));
354 }
355 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Sym); j++) {
356 Elf32_Sym *sym = &sec->symtab[j];
357 sym->st_name = elf32_to_cpu(sym->st_name);
358 sym->st_value = elf32_to_cpu(sym->st_value);
359 sym->st_size = elf32_to_cpu(sym->st_size);
360 sym->st_shndx = elf16_to_cpu(sym->st_shndx);
361 }
362 }
363 }
364
365
read_relocs(FILE * fp)366 static void read_relocs(FILE *fp)
367 {
368 int i,j;
369 for (i = 0; i < ehdr.e_shnum; i++) {
370 struct section *sec = &secs[i];
371 if (sec->shdr.sh_type != SHT_REL) {
372 continue;
373 }
374 sec->reltab = malloc(sec->shdr.sh_size);
375 if (!sec->reltab) {
376 die("malloc of %d bytes for relocs failed\n",
377 sec->shdr.sh_size);
378 }
379 if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
380 die("Seek to %d failed: %s\n",
381 sec->shdr.sh_offset, strerror(errno));
382 }
383 if (fread(sec->reltab, 1, sec->shdr.sh_size, fp)
384 != sec->shdr.sh_size) {
385 die("Cannot read symbol table: %s\n",
386 strerror(errno));
387 }
388 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Rel); j++) {
389 Elf32_Rel *rel = &sec->reltab[j];
390 rel->r_offset = elf32_to_cpu(rel->r_offset);
391 rel->r_info = elf32_to_cpu(rel->r_info);
392 }
393 }
394 }
395
396
print_absolute_symbols(void)397 static void print_absolute_symbols(void)
398 {
399 int i;
400 printf("Absolute symbols\n");
401 printf(" Num: Value Size Type Bind Visibility Name\n");
402 for (i = 0; i < ehdr.e_shnum; i++) {
403 struct section *sec = &secs[i];
404 char *sym_strtab;
405 Elf32_Sym *sh_symtab;
406 int j;
407
408 if (sec->shdr.sh_type != SHT_SYMTAB) {
409 continue;
410 }
411 sh_symtab = sec->symtab;
412 sym_strtab = sec->link->strtab;
413 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Sym); j++) {
414 Elf32_Sym *sym;
415 const char *name;
416 sym = &sec->symtab[j];
417 name = sym_name(sym_strtab, sym);
418 if (sym->st_shndx != SHN_ABS) {
419 continue;
420 }
421 printf("%5d %08x %5d %10s %10s %12s %s\n",
422 j, sym->st_value, sym->st_size,
423 sym_type(ELF32_ST_TYPE(sym->st_info)),
424 sym_bind(ELF32_ST_BIND(sym->st_info)),
425 sym_visibility(ELF32_ST_VISIBILITY(sym->st_other)),
426 name);
427 }
428 }
429 printf("\n");
430 }
431
print_absolute_relocs(void)432 static void print_absolute_relocs(void)
433 {
434 int i, printed = 0;
435
436 for (i = 0; i < ehdr.e_shnum; i++) {
437 struct section *sec = &secs[i];
438 struct section *sec_applies, *sec_symtab;
439 char *sym_strtab;
440 Elf32_Sym *sh_symtab;
441 int j;
442 if (sec->shdr.sh_type != SHT_REL) {
443 continue;
444 }
445 sec_symtab = sec->link;
446 sec_applies = &secs[sec->shdr.sh_info];
447 if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) {
448 continue;
449 }
450 sh_symtab = sec_symtab->symtab;
451 sym_strtab = sec_symtab->link->strtab;
452 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Rel); j++) {
453 Elf32_Rel *rel;
454 Elf32_Sym *sym;
455 const char *name;
456 rel = &sec->reltab[j];
457 sym = &sh_symtab[ELF32_R_SYM(rel->r_info)];
458 name = sym_name(sym_strtab, sym);
459 if (sym->st_shndx != SHN_ABS) {
460 continue;
461 }
462
463 /* Absolute symbols are not relocated if bzImage is
464 * loaded at a non-compiled address. Display a warning
465 * to user at compile time about the absolute
466 * relocations present.
467 *
468 * User need to audit the code to make sure
469 * some symbols which should have been section
470 * relative have not become absolute because of some
471 * linker optimization or wrong programming usage.
472 *
473 * Before warning check if this absolute symbol
474 * relocation is harmless.
475 */
476 if (is_abs_reloc(name) || is_rel_reloc(name))
477 continue;
478
479 if (!printed) {
480 printf("WARNING: Absolute relocations"
481 " present\n");
482 printf("Offset Info Type Sym.Value "
483 "Sym.Name\n");
484 printed = 1;
485 }
486
487 printf("%08x %08x %10s %08x %s\n",
488 rel->r_offset,
489 rel->r_info,
490 rel_type(ELF32_R_TYPE(rel->r_info)),
491 sym->st_value,
492 name);
493 }
494 }
495
496 if (printed)
497 printf("\n");
498 }
499
walk_relocs(void (* visit)(Elf32_Rel * rel,Elf32_Sym * sym))500 static void walk_relocs(void (*visit)(Elf32_Rel *rel, Elf32_Sym *sym))
501 {
502 int i;
503 /* Walk through the relocations */
504 for (i = 0; i < ehdr.e_shnum; i++) {
505 char *sym_strtab;
506 Elf32_Sym *sh_symtab;
507 struct section *sec_applies, *sec_symtab;
508 int j;
509 struct section *sec = &secs[i];
510
511 if (sec->shdr.sh_type != SHT_REL) {
512 continue;
513 }
514 sec_symtab = sec->link;
515 sec_applies = &secs[sec->shdr.sh_info];
516 if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) {
517 continue;
518 }
519 sh_symtab = sec_symtab->symtab;
520 sym_strtab = sec_symtab->link->strtab;
521 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Rel); j++) {
522 Elf32_Rel *rel;
523 Elf32_Sym *sym;
524 unsigned r_type;
525 rel = &sec->reltab[j];
526 sym = &sh_symtab[ELF32_R_SYM(rel->r_info)];
527 r_type = ELF32_R_TYPE(rel->r_info);
528 /* Don't visit relocations to absolute symbols */
529 if (sym->st_shndx == SHN_ABS &&
530 !is_rel_reloc(sym_name(sym_strtab, sym))) {
531 continue;
532 }
533 switch (r_type) {
534 case R_386_NONE:
535 case R_386_PC32:
536 /*
537 * NONE can be ignored and and PC relative
538 * relocations don't need to be adjusted.
539 */
540 break;
541 case R_386_32:
542 /* Visit relocations that need to be adjusted */
543 visit(rel, sym);
544 break;
545 default:
546 die("Unsupported relocation type: %s (%d)\n",
547 rel_type(r_type), r_type);
548 break;
549 }
550 }
551 }
552 }
553
count_reloc(Elf32_Rel * rel,Elf32_Sym * sym)554 static void count_reloc(Elf32_Rel *rel, Elf32_Sym *sym)
555 {
556 reloc_count += 1;
557 }
558
collect_reloc(Elf32_Rel * rel,Elf32_Sym * sym)559 static void collect_reloc(Elf32_Rel *rel, Elf32_Sym *sym)
560 {
561 /* Remember the address that needs to be adjusted. */
562 relocs[reloc_idx++] = rel->r_offset;
563 }
564
cmp_relocs(const void * va,const void * vb)565 static int cmp_relocs(const void *va, const void *vb)
566 {
567 const unsigned long *a, *b;
568 a = va; b = vb;
569 return (*a == *b)? 0 : (*a > *b)? 1 : -1;
570 }
571
emit_relocs(int as_text)572 static void emit_relocs(int as_text)
573 {
574 int i;
575 /* Count how many relocations I have and allocate space for them. */
576 reloc_count = 0;
577 walk_relocs(count_reloc);
578 relocs = malloc(reloc_count * sizeof(relocs[0]));
579 if (!relocs) {
580 die("malloc of %d entries for relocs failed\n",
581 reloc_count);
582 }
583 /* Collect up the relocations */
584 reloc_idx = 0;
585 walk_relocs(collect_reloc);
586
587 /* Order the relocations for more efficient processing */
588 qsort(relocs, reloc_count, sizeof(relocs[0]), cmp_relocs);
589
590 /* Print the relocations */
591 if (as_text) {
592 /* Print the relocations in a form suitable that
593 * gas will like.
594 */
595 printf(".section \".data.reloc\",\"a\"\n");
596 printf(".balign 4\n");
597 for (i = 0; i < reloc_count; i++) {
598 printf("\t .long 0x%08lx\n", relocs[i]);
599 }
600 printf("\n");
601 }
602 else {
603 unsigned char buf[4];
604 /* Print a stop */
605 fwrite("\0\0\0\0", 4, 1, stdout);
606 /* Now print each relocation */
607 for (i = 0; i < reloc_count; i++) {
608 buf[0] = (relocs[i] >> 0) & 0xff;
609 buf[1] = (relocs[i] >> 8) & 0xff;
610 buf[2] = (relocs[i] >> 16) & 0xff;
611 buf[3] = (relocs[i] >> 24) & 0xff;
612 fwrite(buf, 4, 1, stdout);
613 }
614 }
615 }
616
usage(void)617 static void usage(void)
618 {
619 die("relocs [--abs-syms |--abs-relocs | --text] vmlinux\n");
620 }
621
main(int argc,char ** argv)622 int main(int argc, char **argv)
623 {
624 int show_absolute_syms, show_absolute_relocs;
625 int as_text;
626 const char *fname;
627 FILE *fp;
628 int i;
629
630 regex_init();
631
632 show_absolute_syms = 0;
633 show_absolute_relocs = 0;
634 as_text = 0;
635 fname = NULL;
636 for (i = 1; i < argc; i++) {
637 char *arg = argv[i];
638 if (*arg == '-') {
639 if (strcmp(argv[1], "--abs-syms") == 0) {
640 show_absolute_syms = 1;
641 continue;
642 }
643
644 if (strcmp(argv[1], "--abs-relocs") == 0) {
645 show_absolute_relocs = 1;
646 continue;
647 }
648 else if (strcmp(argv[1], "--text") == 0) {
649 as_text = 1;
650 continue;
651 }
652 }
653 else if (!fname) {
654 fname = arg;
655 continue;
656 }
657 usage();
658 }
659 if (!fname) {
660 usage();
661 }
662 fp = fopen(fname, "r");
663 if (!fp) {
664 die("Cannot open %s: %s\n",
665 fname, strerror(errno));
666 }
667 read_ehdr(fp);
668 read_shdrs(fp);
669 read_strtabs(fp);
670 read_symtabs(fp);
671 read_relocs(fp);
672 if (show_absolute_syms) {
673 print_absolute_symbols();
674 return 0;
675 }
676 if (show_absolute_relocs) {
677 print_absolute_relocs();
678 return 0;
679 }
680 emit_relocs(as_text);
681 return 0;
682 }
683