i2c: davinci: Free requested IRQ in remove
[pandora-kernel.git] / arch / x86 / boot / compressed / relocs.c
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;
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;
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
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
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
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
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
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
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
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
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
207 static uint16_t elf16_to_cpu(uint16_t val)
208 {
209         return le16_to_cpu(val);
210 }
211
212 static uint32_t elf32_to_cpu(uint32_t val)
213 {
214         return le32_to_cpu(val);
215 }
216
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
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
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
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
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
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                 int j;
406
407                 if (sec->shdr.sh_type != SHT_SYMTAB) {
408                         continue;
409                 }
410                 sym_strtab = sec->link->strtab;
411                 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Sym); j++) {
412                         Elf32_Sym *sym;
413                         const char *name;
414                         sym = &sec->symtab[j];
415                         name = sym_name(sym_strtab, sym);
416                         if (sym->st_shndx != SHN_ABS) {
417                                 continue;
418                         }
419                         printf("%5d %08x %5d %10s %10s %12s %s\n",
420                                 j, sym->st_value, sym->st_size,
421                                 sym_type(ELF32_ST_TYPE(sym->st_info)),
422                                 sym_bind(ELF32_ST_BIND(sym->st_info)),
423                                 sym_visibility(ELF32_ST_VISIBILITY(sym->st_other)),
424                                 name);
425                 }
426         }
427         printf("\n");
428 }
429
430 static void print_absolute_relocs(void)
431 {
432         int i, printed = 0;
433
434         for (i = 0; i < ehdr.e_shnum; i++) {
435                 struct section *sec = &secs[i];
436                 struct section *sec_applies, *sec_symtab;
437                 char *sym_strtab;
438                 Elf32_Sym *sh_symtab;
439                 int j;
440                 if (sec->shdr.sh_type != SHT_REL) {
441                         continue;
442                 }
443                 sec_symtab  = sec->link;
444                 sec_applies = &secs[sec->shdr.sh_info];
445                 if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) {
446                         continue;
447                 }
448                 sh_symtab  = sec_symtab->symtab;
449                 sym_strtab = sec_symtab->link->strtab;
450                 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Rel); j++) {
451                         Elf32_Rel *rel;
452                         Elf32_Sym *sym;
453                         const char *name;
454                         rel = &sec->reltab[j];
455                         sym = &sh_symtab[ELF32_R_SYM(rel->r_info)];
456                         name = sym_name(sym_strtab, sym);
457                         if (sym->st_shndx != SHN_ABS) {
458                                 continue;
459                         }
460
461                         /* Absolute symbols are not relocated if bzImage is
462                          * loaded at a non-compiled address. Display a warning
463                          * to user at compile time about the absolute
464                          * relocations present.
465                          *
466                          * User need to audit the code to make sure
467                          * some symbols which should have been section
468                          * relative have not become absolute because of some
469                          * linker optimization or wrong programming usage.
470                          *
471                          * Before warning check if this absolute symbol
472                          * relocation is harmless.
473                          */
474                         if (is_abs_reloc(name) || is_rel_reloc(name))
475                                 continue;
476
477                         if (!printed) {
478                                 printf("WARNING: Absolute relocations"
479                                         " present\n");
480                                 printf("Offset     Info     Type     Sym.Value "
481                                         "Sym.Name\n");
482                                 printed = 1;
483                         }
484
485                         printf("%08x %08x %10s %08x  %s\n",
486                                 rel->r_offset,
487                                 rel->r_info,
488                                 rel_type(ELF32_R_TYPE(rel->r_info)),
489                                 sym->st_value,
490                                 name);
491                 }
492         }
493
494         if (printed)
495                 printf("\n");
496 }
497
498 static void walk_relocs(void (*visit)(Elf32_Rel *rel, Elf32_Sym *sym))
499 {
500         int i;
501         /* Walk through the relocations */
502         for (i = 0; i < ehdr.e_shnum; i++) {
503                 char *sym_strtab;
504                 Elf32_Sym *sh_symtab;
505                 struct section *sec_applies, *sec_symtab;
506                 int j;
507                 struct section *sec = &secs[i];
508
509                 if (sec->shdr.sh_type != SHT_REL) {
510                         continue;
511                 }
512                 sec_symtab  = sec->link;
513                 sec_applies = &secs[sec->shdr.sh_info];
514                 if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) {
515                         continue;
516                 }
517                 sh_symtab = sec_symtab->symtab;
518                 sym_strtab = sec_symtab->link->strtab;
519                 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Rel); j++) {
520                         Elf32_Rel *rel;
521                         Elf32_Sym *sym;
522                         unsigned r_type;
523                         rel = &sec->reltab[j];
524                         sym = &sh_symtab[ELF32_R_SYM(rel->r_info)];
525                         r_type = ELF32_R_TYPE(rel->r_info);
526                         /* Don't visit relocations to absolute symbols */
527                         if (sym->st_shndx == SHN_ABS &&
528                             !is_rel_reloc(sym_name(sym_strtab, sym))) {
529                                 continue;
530                         }
531                         switch (r_type) {
532                         case R_386_NONE:
533                         case R_386_PC32:
534                                 /*
535                                  * NONE can be ignored and and PC relative
536                                  * relocations don't need to be adjusted.
537                                  */
538                                 break;
539                         case R_386_32:
540                                 /* Visit relocations that need to be adjusted */
541                                 visit(rel, sym);
542                                 break;
543                         default:
544                                 die("Unsupported relocation type: %s (%d)\n",
545                                     rel_type(r_type), r_type);
546                                 break;
547                         }
548                 }
549         }
550 }
551
552 static void count_reloc(Elf32_Rel *rel, Elf32_Sym *sym)
553 {
554         reloc_count += 1;
555 }
556
557 static void collect_reloc(Elf32_Rel *rel, Elf32_Sym *sym)
558 {
559         /* Remember the address that needs to be adjusted. */
560         relocs[reloc_idx++] = rel->r_offset;
561 }
562
563 static int cmp_relocs(const void *va, const void *vb)
564 {
565         const unsigned long *a, *b;
566         a = va; b = vb;
567         return (*a == *b)? 0 : (*a > *b)? 1 : -1;
568 }
569
570 static void emit_relocs(int as_text)
571 {
572         int i;
573         /* Count how many relocations I have and allocate space for them. */
574         reloc_count = 0;
575         walk_relocs(count_reloc);
576         relocs = malloc(reloc_count * sizeof(relocs[0]));
577         if (!relocs) {
578                 die("malloc of %d entries for relocs failed\n",
579                         reloc_count);
580         }
581         /* Collect up the relocations */
582         reloc_idx = 0;
583         walk_relocs(collect_reloc);
584
585         /* Order the relocations for more efficient processing */
586         qsort(relocs, reloc_count, sizeof(relocs[0]), cmp_relocs);
587
588         /* Print the relocations */
589         if (as_text) {
590                 /* Print the relocations in a form suitable that
591                  * gas will like.
592                  */
593                 printf(".section \".data.reloc\",\"a\"\n");
594                 printf(".balign 4\n");
595                 for (i = 0; i < reloc_count; i++) {
596                         printf("\t .long 0x%08lx\n", relocs[i]);
597                 }
598                 printf("\n");
599         }
600         else {
601                 unsigned char buf[4];
602                 /* Print a stop */
603                 fwrite("\0\0\0\0", 4, 1, stdout);
604                 /* Now print each relocation */
605                 for (i = 0; i < reloc_count; i++) {
606                         buf[0] = (relocs[i] >>  0) & 0xff;
607                         buf[1] = (relocs[i] >>  8) & 0xff;
608                         buf[2] = (relocs[i] >> 16) & 0xff;
609                         buf[3] = (relocs[i] >> 24) & 0xff;
610                         fwrite(buf, 4, 1, stdout);
611                 }
612         }
613 }
614
615 static void usage(void)
616 {
617         die("relocs [--abs-syms |--abs-relocs | --text] vmlinux\n");
618 }
619
620 int main(int argc, char **argv)
621 {
622         int show_absolute_syms, show_absolute_relocs;
623         int as_text;
624         const char *fname;
625         FILE *fp;
626         int i;
627
628         regex_init();
629
630         show_absolute_syms = 0;
631         show_absolute_relocs = 0;
632         as_text = 0;
633         fname = NULL;
634         for (i = 1; i < argc; i++) {
635                 char *arg = argv[i];
636                 if (*arg == '-') {
637                         if (strcmp(argv[1], "--abs-syms") == 0) {
638                                 show_absolute_syms = 1;
639                                 continue;
640                         }
641
642                         if (strcmp(argv[1], "--abs-relocs") == 0) {
643                                 show_absolute_relocs = 1;
644                                 continue;
645                         }
646                         else if (strcmp(argv[1], "--text") == 0) {
647                                 as_text = 1;
648                                 continue;
649                         }
650                 }
651                 else if (!fname) {
652                         fname = arg;
653                         continue;
654                 }
655                 usage();
656         }
657         if (!fname) {
658                 usage();
659         }
660         fp = fopen(fname, "r");
661         if (!fp) {
662                 die("Cannot open %s: %s\n",
663                         fname, strerror(errno));
664         }
665         read_ehdr(fp);
666         read_shdrs(fp);
667         read_strtabs(fp);
668         read_symtabs(fp);
669         read_relocs(fp);
670         if (show_absolute_syms) {
671                 print_absolute_symbols();
672                 return 0;
673         }
674         if (show_absolute_relocs) {
675                 print_absolute_relocs();
676                 return 0;
677         }
678         emit_relocs(as_text);
679         return 0;
680 }