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#include <tools/le_byteshift.h>
14
15static void die(char *fmt, ...);
16
17#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
18static Elf32_Ehdr ehdr;
19static unsigned long reloc_count, reloc_idx;
20static unsigned long *relocs;
21static unsigned long reloc16_count, reloc16_idx;
22static unsigned long *relocs16;
23
24struct section {
25 Elf32_Shdr shdr;
26 struct section *link;
27 Elf32_Sym *symtab;
28 Elf32_Rel *reltab;
29 char *strtab;
30};
31static struct section *secs;
32
33enum symtype {
34 S_ABS,
35 S_REL,
36 S_SEG,
37 S_LIN,
38 S_NSYMTYPES
39};
40
41static const char * const sym_regex_kernel[S_NSYMTYPES] = {
42
43
44
45
46
47
48 [S_ABS] =
49 "^(xen_irq_disable_direct_reloc$|"
50 "xen_save_fl_direct_reloc$|"
51 "VDSO|"
52 "__crc_)",
53
54
55
56
57
58 [S_REL] =
59 "^(__init_(begin|end)|"
60 "__x86_cpu_dev_(start|end)|"
61 "(__parainstructions|__alt_instructions)(|_end)|"
62 "(__iommu_table|__apicdrivers|__smp_locks)(|_end)|"
63 "__(start|end)_pci_.*|"
64 "__(start|end)_builtin_fw|"
65 "__(start|stop)___ksymtab(|_gpl|_unused|_unused_gpl|_gpl_future)|"
66 "__(start|stop)___kcrctab(|_gpl|_unused|_unused_gpl|_gpl_future)|"
67 "__(start|stop)___param|"
68 "__(start|stop)___modver|"
69 "__(start|stop)___bug_table|"
70 "__tracedata_(start|end)|"
71 "__(start|stop)_notes|"
72 "__end_rodata|"
73 "__initramfs_start|"
74 "(jiffies|jiffies_64)|"
75 "_end)$"
76};
77
78
79static const char * const sym_regex_realmode[S_NSYMTYPES] = {
80
81
82
83
84 [S_REL] =
85 "^pa_",
86
87
88
89
90 [S_SEG] =
91 "^real_mode_seg$",
92
93
94
95
96
97 [S_LIN] =
98 "^pa_",
99};
100
101static const char * const *sym_regex;
102
103static regex_t sym_regex_c[S_NSYMTYPES];
104static int is_reloc(enum symtype type, const char *sym_name)
105{
106 return sym_regex[type] &&
107 !regexec(&sym_regex_c[type], sym_name, 0, NULL, 0);
108}
109
110static void regex_init(int use_real_mode)
111{
112 char errbuf[128];
113 int err;
114 int i;
115
116 if (use_real_mode)
117 sym_regex = sym_regex_realmode;
118 else
119 sym_regex = sym_regex_kernel;
120
121 for (i = 0; i < S_NSYMTYPES; i++) {
122 if (!sym_regex[i])
123 continue;
124
125 err = regcomp(&sym_regex_c[i], sym_regex[i],
126 REG_EXTENDED|REG_NOSUB);
127
128 if (err) {
129 regerror(err, &sym_regex_c[i], errbuf, sizeof errbuf);
130 die("%s", errbuf);
131 }
132 }
133}
134
135static void die(char *fmt, ...)
136{
137 va_list ap;
138 va_start(ap, fmt);
139 vfprintf(stderr, fmt, ap);
140 va_end(ap);
141 exit(1);
142}
143
144static const char *sym_type(unsigned type)
145{
146 static const char *type_name[] = {
147#define SYM_TYPE(X) [X] = #X
148 SYM_TYPE(STT_NOTYPE),
149 SYM_TYPE(STT_OBJECT),
150 SYM_TYPE(STT_FUNC),
151 SYM_TYPE(STT_SECTION),
152 SYM_TYPE(STT_FILE),
153 SYM_TYPE(STT_COMMON),
154 SYM_TYPE(STT_TLS),
155#undef SYM_TYPE
156 };
157 const char *name = "unknown sym type name";
158 if (type < ARRAY_SIZE(type_name)) {
159 name = type_name[type];
160 }
161 return name;
162}
163
164static const char *sym_bind(unsigned bind)
165{
166 static const char *bind_name[] = {
167#define SYM_BIND(X) [X] = #X
168 SYM_BIND(STB_LOCAL),
169 SYM_BIND(STB_GLOBAL),
170 SYM_BIND(STB_WEAK),
171#undef SYM_BIND
172 };
173 const char *name = "unknown sym bind name";
174 if (bind < ARRAY_SIZE(bind_name)) {
175 name = bind_name[bind];
176 }
177 return name;
178}
179
180static const char *sym_visibility(unsigned visibility)
181{
182 static const char *visibility_name[] = {
183#define SYM_VISIBILITY(X) [X] = #X
184 SYM_VISIBILITY(STV_DEFAULT),
185 SYM_VISIBILITY(STV_INTERNAL),
186 SYM_VISIBILITY(STV_HIDDEN),
187 SYM_VISIBILITY(STV_PROTECTED),
188#undef SYM_VISIBILITY
189 };
190 const char *name = "unknown sym visibility name";
191 if (visibility < ARRAY_SIZE(visibility_name)) {
192 name = visibility_name[visibility];
193 }
194 return name;
195}
196
197static const char *rel_type(unsigned type)
198{
199 static const char *type_name[] = {
200#define REL_TYPE(X) [X] = #X
201 REL_TYPE(R_386_NONE),
202 REL_TYPE(R_386_32),
203 REL_TYPE(R_386_PC32),
204 REL_TYPE(R_386_GOT32),
205 REL_TYPE(R_386_PLT32),
206 REL_TYPE(R_386_COPY),
207 REL_TYPE(R_386_GLOB_DAT),
208 REL_TYPE(R_386_JMP_SLOT),
209 REL_TYPE(R_386_RELATIVE),
210 REL_TYPE(R_386_GOTOFF),
211 REL_TYPE(R_386_GOTPC),
212 REL_TYPE(R_386_8),
213 REL_TYPE(R_386_PC8),
214 REL_TYPE(R_386_16),
215 REL_TYPE(R_386_PC16),
216#undef REL_TYPE
217 };
218 const char *name = "unknown type rel type name";
219 if (type < ARRAY_SIZE(type_name) && type_name[type]) {
220 name = type_name[type];
221 }
222 return name;
223}
224
225static const char *sec_name(unsigned shndx)
226{
227 const char *sec_strtab;
228 const char *name;
229 sec_strtab = secs[ehdr.e_shstrndx].strtab;
230 name = "<noname>";
231 if (shndx < ehdr.e_shnum) {
232 name = sec_strtab + secs[shndx].shdr.sh_name;
233 }
234 else if (shndx == SHN_ABS) {
235 name = "ABSOLUTE";
236 }
237 else if (shndx == SHN_COMMON) {
238 name = "COMMON";
239 }
240 return name;
241}
242
243static const char *sym_name(const char *sym_strtab, Elf32_Sym *sym)
244{
245 const char *name;
246 name = "<noname>";
247 if (sym->st_name) {
248 name = sym_strtab + sym->st_name;
249 }
250 else {
251 name = sec_name(sym->st_shndx);
252 }
253 return name;
254}
255
256
257
258#if BYTE_ORDER == LITTLE_ENDIAN
259#define le16_to_cpu(val) (val)
260#define le32_to_cpu(val) (val)
261#endif
262#if BYTE_ORDER == BIG_ENDIAN
263#define le16_to_cpu(val) bswap_16(val)
264#define le32_to_cpu(val) bswap_32(val)
265#endif
266
267static uint16_t elf16_to_cpu(uint16_t val)
268{
269 return le16_to_cpu(val);
270}
271
272static uint32_t elf32_to_cpu(uint32_t val)
273{
274 return le32_to_cpu(val);
275}
276
277static void read_ehdr(FILE *fp)
278{
279 if (fread(&ehdr, sizeof(ehdr), 1, fp) != 1) {
280 die("Cannot read ELF header: %s\n",
281 strerror(errno));
282 }
283 if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) {
284 die("No ELF magic\n");
285 }
286 if (ehdr.e_ident[EI_CLASS] != ELFCLASS32) {
287 die("Not a 32 bit executable\n");
288 }
289 if (ehdr.e_ident[EI_DATA] != ELFDATA2LSB) {
290 die("Not a LSB ELF executable\n");
291 }
292 if (ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
293 die("Unknown ELF version\n");
294 }
295
296 ehdr.e_type = elf16_to_cpu(ehdr.e_type);
297 ehdr.e_machine = elf16_to_cpu(ehdr.e_machine);
298 ehdr.e_version = elf32_to_cpu(ehdr.e_version);
299 ehdr.e_entry = elf32_to_cpu(ehdr.e_entry);
300 ehdr.e_phoff = elf32_to_cpu(ehdr.e_phoff);
301 ehdr.e_shoff = elf32_to_cpu(ehdr.e_shoff);
302 ehdr.e_flags = elf32_to_cpu(ehdr.e_flags);
303 ehdr.e_ehsize = elf16_to_cpu(ehdr.e_ehsize);
304 ehdr.e_phentsize = elf16_to_cpu(ehdr.e_phentsize);
305 ehdr.e_phnum = elf16_to_cpu(ehdr.e_phnum);
306 ehdr.e_shentsize = elf16_to_cpu(ehdr.e_shentsize);
307 ehdr.e_shnum = elf16_to_cpu(ehdr.e_shnum);
308 ehdr.e_shstrndx = elf16_to_cpu(ehdr.e_shstrndx);
309
310 if ((ehdr.e_type != ET_EXEC) && (ehdr.e_type != ET_DYN)) {
311 die("Unsupported ELF header type\n");
312 }
313 if (ehdr.e_machine != EM_386) {
314 die("Not for x86\n");
315 }
316 if (ehdr.e_version != EV_CURRENT) {
317 die("Unknown ELF version\n");
318 }
319 if (ehdr.e_ehsize != sizeof(Elf32_Ehdr)) {
320 die("Bad Elf header size\n");
321 }
322 if (ehdr.e_phentsize != sizeof(Elf32_Phdr)) {
323 die("Bad program header entry\n");
324 }
325 if (ehdr.e_shentsize != sizeof(Elf32_Shdr)) {
326 die("Bad section header entry\n");
327 }
328 if (ehdr.e_shstrndx >= ehdr.e_shnum) {
329 die("String table index out of bounds\n");
330 }
331}
332
333static void read_shdrs(FILE *fp)
334{
335 int i;
336 Elf32_Shdr shdr;
337
338 secs = calloc(ehdr.e_shnum, sizeof(struct section));
339 if (!secs) {
340 die("Unable to allocate %d section headers\n",
341 ehdr.e_shnum);
342 }
343 if (fseek(fp, ehdr.e_shoff, SEEK_SET) < 0) {
344 die("Seek to %d failed: %s\n",
345 ehdr.e_shoff, strerror(errno));
346 }
347 for (i = 0; i < ehdr.e_shnum; i++) {
348 struct section *sec = &secs[i];
349 if (fread(&shdr, sizeof shdr, 1, fp) != 1)
350 die("Cannot read ELF section headers %d/%d: %s\n",
351 i, ehdr.e_shnum, strerror(errno));
352 sec->shdr.sh_name = elf32_to_cpu(shdr.sh_name);
353 sec->shdr.sh_type = elf32_to_cpu(shdr.sh_type);
354 sec->shdr.sh_flags = elf32_to_cpu(shdr.sh_flags);
355 sec->shdr.sh_addr = elf32_to_cpu(shdr.sh_addr);
356 sec->shdr.sh_offset = elf32_to_cpu(shdr.sh_offset);
357 sec->shdr.sh_size = elf32_to_cpu(shdr.sh_size);
358 sec->shdr.sh_link = elf32_to_cpu(shdr.sh_link);
359 sec->shdr.sh_info = elf32_to_cpu(shdr.sh_info);
360 sec->shdr.sh_addralign = elf32_to_cpu(shdr.sh_addralign);
361 sec->shdr.sh_entsize = elf32_to_cpu(shdr.sh_entsize);
362 if (sec->shdr.sh_link < ehdr.e_shnum)
363 sec->link = &secs[sec->shdr.sh_link];
364 }
365
366}
367
368static void read_strtabs(FILE *fp)
369{
370 int i;
371 for (i = 0; i < ehdr.e_shnum; i++) {
372 struct section *sec = &secs[i];
373 if (sec->shdr.sh_type != SHT_STRTAB) {
374 continue;
375 }
376 sec->strtab = malloc(sec->shdr.sh_size);
377 if (!sec->strtab) {
378 die("malloc of %d bytes for strtab failed\n",
379 sec->shdr.sh_size);
380 }
381 if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
382 die("Seek to %d failed: %s\n",
383 sec->shdr.sh_offset, strerror(errno));
384 }
385 if (fread(sec->strtab, 1, sec->shdr.sh_size, fp)
386 != sec->shdr.sh_size) {
387 die("Cannot read symbol table: %s\n",
388 strerror(errno));
389 }
390 }
391}
392
393static void read_symtabs(FILE *fp)
394{
395 int i,j;
396 for (i = 0; i < ehdr.e_shnum; i++) {
397 struct section *sec = &secs[i];
398 if (sec->shdr.sh_type != SHT_SYMTAB) {
399 continue;
400 }
401 sec->symtab = malloc(sec->shdr.sh_size);
402 if (!sec->symtab) {
403 die("malloc of %d bytes for symtab failed\n",
404 sec->shdr.sh_size);
405 }
406 if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
407 die("Seek to %d failed: %s\n",
408 sec->shdr.sh_offset, strerror(errno));
409 }
410 if (fread(sec->symtab, 1, sec->shdr.sh_size, fp)
411 != sec->shdr.sh_size) {
412 die("Cannot read symbol table: %s\n",
413 strerror(errno));
414 }
415 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Sym); j++) {
416 Elf32_Sym *sym = &sec->symtab[j];
417 sym->st_name = elf32_to_cpu(sym->st_name);
418 sym->st_value = elf32_to_cpu(sym->st_value);
419 sym->st_size = elf32_to_cpu(sym->st_size);
420 sym->st_shndx = elf16_to_cpu(sym->st_shndx);
421 }
422 }
423}
424
425
426static void read_relocs(FILE *fp)
427{
428 int i,j;
429 for (i = 0; i < ehdr.e_shnum; i++) {
430 struct section *sec = &secs[i];
431 if (sec->shdr.sh_type != SHT_REL) {
432 continue;
433 }
434 sec->reltab = malloc(sec->shdr.sh_size);
435 if (!sec->reltab) {
436 die("malloc of %d bytes for relocs failed\n",
437 sec->shdr.sh_size);
438 }
439 if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
440 die("Seek to %d failed: %s\n",
441 sec->shdr.sh_offset, strerror(errno));
442 }
443 if (fread(sec->reltab, 1, sec->shdr.sh_size, fp)
444 != sec->shdr.sh_size) {
445 die("Cannot read symbol table: %s\n",
446 strerror(errno));
447 }
448 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Rel); j++) {
449 Elf32_Rel *rel = &sec->reltab[j];
450 rel->r_offset = elf32_to_cpu(rel->r_offset);
451 rel->r_info = elf32_to_cpu(rel->r_info);
452 }
453 }
454}
455
456
457static void print_absolute_symbols(void)
458{
459 int i;
460 printf("Absolute symbols\n");
461 printf(" Num: Value Size Type Bind Visibility Name\n");
462 for (i = 0; i < ehdr.e_shnum; i++) {
463 struct section *sec = &secs[i];
464 char *sym_strtab;
465 int j;
466
467 if (sec->shdr.sh_type != SHT_SYMTAB) {
468 continue;
469 }
470 sym_strtab = sec->link->strtab;
471 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Sym); j++) {
472 Elf32_Sym *sym;
473 const char *name;
474 sym = &sec->symtab[j];
475 name = sym_name(sym_strtab, sym);
476 if (sym->st_shndx != SHN_ABS) {
477 continue;
478 }
479 printf("%5d %08x %5d %10s %10s %12s %s\n",
480 j, sym->st_value, sym->st_size,
481 sym_type(ELF32_ST_TYPE(sym->st_info)),
482 sym_bind(ELF32_ST_BIND(sym->st_info)),
483 sym_visibility(ELF32_ST_VISIBILITY(sym->st_other)),
484 name);
485 }
486 }
487 printf("\n");
488}
489
490static void print_absolute_relocs(void)
491{
492 int i, printed = 0;
493
494 for (i = 0; i < ehdr.e_shnum; i++) {
495 struct section *sec = &secs[i];
496 struct section *sec_applies, *sec_symtab;
497 char *sym_strtab;
498 Elf32_Sym *sh_symtab;
499 int j;
500 if (sec->shdr.sh_type != SHT_REL) {
501 continue;
502 }
503 sec_symtab = sec->link;
504 sec_applies = &secs[sec->shdr.sh_info];
505 if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) {
506 continue;
507 }
508 sh_symtab = sec_symtab->symtab;
509 sym_strtab = sec_symtab->link->strtab;
510 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Rel); j++) {
511 Elf32_Rel *rel;
512 Elf32_Sym *sym;
513 const char *name;
514 rel = &sec->reltab[j];
515 sym = &sh_symtab[ELF32_R_SYM(rel->r_info)];
516 name = sym_name(sym_strtab, sym);
517 if (sym->st_shndx != SHN_ABS) {
518 continue;
519 }
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534 if (is_reloc(S_ABS, name) || is_reloc(S_REL, name))
535 continue;
536
537 if (!printed) {
538 printf("WARNING: Absolute relocations"
539 " present\n");
540 printf("Offset Info Type Sym.Value "
541 "Sym.Name\n");
542 printed = 1;
543 }
544
545 printf("%08x %08x %10s %08x %s\n",
546 rel->r_offset,
547 rel->r_info,
548 rel_type(ELF32_R_TYPE(rel->r_info)),
549 sym->st_value,
550 name);
551 }
552 }
553
554 if (printed)
555 printf("\n");
556}
557
558static void walk_relocs(void (*visit)(Elf32_Rel *rel, Elf32_Sym *sym),
559 int use_real_mode)
560{
561 int i;
562
563 for (i = 0; i < ehdr.e_shnum; i++) {
564 char *sym_strtab;
565 Elf32_Sym *sh_symtab;
566 struct section *sec_applies, *sec_symtab;
567 int j;
568 struct section *sec = &secs[i];
569
570 if (sec->shdr.sh_type != SHT_REL) {
571 continue;
572 }
573 sec_symtab = sec->link;
574 sec_applies = &secs[sec->shdr.sh_info];
575 if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) {
576 continue;
577 }
578 sh_symtab = sec_symtab->symtab;
579 sym_strtab = sec_symtab->link->strtab;
580 for (j = 0; j < sec->shdr.sh_size/sizeof(Elf32_Rel); j++) {
581 Elf32_Rel *rel;
582 Elf32_Sym *sym;
583 unsigned r_type;
584 const char *symname;
585 int shn_abs;
586
587 rel = &sec->reltab[j];
588 sym = &sh_symtab[ELF32_R_SYM(rel->r_info)];
589 r_type = ELF32_R_TYPE(rel->r_info);
590
591 shn_abs = sym->st_shndx == SHN_ABS;
592
593 switch (r_type) {
594 case R_386_NONE:
595 case R_386_PC32:
596 case R_386_PC16:
597 case R_386_PC8:
598
599
600
601
602 break;
603
604 case R_386_16:
605 symname = sym_name(sym_strtab, sym);
606 if (!use_real_mode)
607 goto bad;
608 if (shn_abs) {
609 if (is_reloc(S_ABS, symname))
610 break;
611 else if (!is_reloc(S_SEG, symname))
612 goto bad;
613 } else {
614 if (is_reloc(S_LIN, symname))
615 goto bad;
616 else
617 break;
618 }
619 visit(rel, sym);
620 break;
621
622 case R_386_32:
623 symname = sym_name(sym_strtab, sym);
624 if (shn_abs) {
625 if (is_reloc(S_ABS, symname))
626 break;
627 else if (!is_reloc(S_REL, symname))
628 goto bad;
629 } else {
630 if (use_real_mode &&
631 !is_reloc(S_LIN, symname))
632 break;
633 }
634 visit(rel, sym);
635 break;
636 default:
637 die("Unsupported relocation type: %s (%d)\n",
638 rel_type(r_type), r_type);
639 break;
640 bad:
641 symname = sym_name(sym_strtab, sym);
642 die("Invalid %s %s relocation: %s\n",
643 shn_abs ? "absolute" : "relative",
644 rel_type(r_type), symname);
645 }
646 }
647 }
648}
649
650static void count_reloc(Elf32_Rel *rel, Elf32_Sym *sym)
651{
652 if (ELF32_R_TYPE(rel->r_info) == R_386_16)
653 reloc16_count++;
654 else
655 reloc_count++;
656}
657
658static void collect_reloc(Elf32_Rel *rel, Elf32_Sym *sym)
659{
660
661 if (ELF32_R_TYPE(rel->r_info) == R_386_16)
662 relocs16[reloc16_idx++] = rel->r_offset;
663 else
664 relocs[reloc_idx++] = rel->r_offset;
665}
666
667static int cmp_relocs(const void *va, const void *vb)
668{
669 const unsigned long *a, *b;
670 a = va; b = vb;
671 return (*a == *b)? 0 : (*a > *b)? 1 : -1;
672}
673
674static int write32(unsigned int v, FILE *f)
675{
676 unsigned char buf[4];
677
678 put_unaligned_le32(v, buf);
679 return fwrite(buf, 1, 4, f) == 4 ? 0 : -1;
680}
681
682static void emit_relocs(int as_text, int use_real_mode)
683{
684 int i;
685
686 reloc_count = 0;
687 walk_relocs(count_reloc, use_real_mode);
688 relocs = malloc(reloc_count * sizeof(relocs[0]));
689 if (!relocs) {
690 die("malloc of %d entries for relocs failed\n",
691 reloc_count);
692 }
693
694 relocs16 = malloc(reloc16_count * sizeof(relocs[0]));
695 if (!relocs16) {
696 die("malloc of %d entries for relocs16 failed\n",
697 reloc16_count);
698 }
699
700 reloc_idx = 0;
701 walk_relocs(collect_reloc, use_real_mode);
702
703 if (reloc16_count && !use_real_mode)
704 die("Segment relocations found but --realmode not specified\n");
705
706
707 qsort(relocs, reloc_count, sizeof(relocs[0]), cmp_relocs);
708 qsort(relocs16, reloc16_count, sizeof(relocs16[0]), cmp_relocs);
709
710
711 if (as_text) {
712
713
714
715 printf(".section \".data.reloc\",\"a\"\n");
716 printf(".balign 4\n");
717 if (use_real_mode) {
718 printf("\t.long %lu\n", reloc16_count);
719 for (i = 0; i < reloc16_count; i++)
720 printf("\t.long 0x%08lx\n", relocs16[i]);
721 printf("\t.long %lu\n", reloc_count);
722 for (i = 0; i < reloc_count; i++) {
723 printf("\t.long 0x%08lx\n", relocs[i]);
724 }
725 } else {
726
727 printf("\t.long 0x%08lx\n", (unsigned long)0);
728 for (i = 0; i < reloc_count; i++) {
729 printf("\t.long 0x%08lx\n", relocs[i]);
730 }
731 }
732
733 printf("\n");
734 }
735 else {
736 if (use_real_mode) {
737 write32(reloc16_count, stdout);
738 for (i = 0; i < reloc16_count; i++)
739 write32(relocs16[i], stdout);
740 write32(reloc_count, stdout);
741
742
743 for (i = 0; i < reloc_count; i++)
744 write32(relocs[i], stdout);
745 } else {
746
747 write32(0, stdout);
748
749
750 for (i = 0; i < reloc_count; i++) {
751 write32(relocs[i], stdout);
752 }
753 }
754 }
755}
756
757static void usage(void)
758{
759 die("relocs [--abs-syms|--abs-relocs|--text|--realmode] vmlinux\n");
760}
761
762int main(int argc, char **argv)
763{
764 int show_absolute_syms, show_absolute_relocs;
765 int as_text, use_real_mode;
766 const char *fname;
767 FILE *fp;
768 int i;
769
770 show_absolute_syms = 0;
771 show_absolute_relocs = 0;
772 as_text = 0;
773 use_real_mode = 0;
774 fname = NULL;
775 for (i = 1; i < argc; i++) {
776 char *arg = argv[i];
777 if (*arg == '-') {
778 if (strcmp(arg, "--abs-syms") == 0) {
779 show_absolute_syms = 1;
780 continue;
781 }
782 if (strcmp(arg, "--abs-relocs") == 0) {
783 show_absolute_relocs = 1;
784 continue;
785 }
786 if (strcmp(arg, "--text") == 0) {
787 as_text = 1;
788 continue;
789 }
790 if (strcmp(arg, "--realmode") == 0) {
791 use_real_mode = 1;
792 continue;
793 }
794 }
795 else if (!fname) {
796 fname = arg;
797 continue;
798 }
799 usage();
800 }
801 if (!fname) {
802 usage();
803 }
804 regex_init(use_real_mode);
805 fp = fopen(fname, "r");
806 if (!fp) {
807 die("Cannot open %s: %s\n",
808 fname, strerror(errno));
809 }
810 read_ehdr(fp);
811 read_shdrs(fp);
812 read_strtabs(fp);
813 read_symtabs(fp);
814 read_relocs(fp);
815 if (show_absolute_syms) {
816 print_absolute_symbols();
817 goto out;
818 }
819 if (show_absolute_relocs) {
820 print_absolute_relocs();
821 goto out;
822 }
823 emit_relocs(as_text, use_real_mode);
824out:
825 fclose(fp);
826 return 0;
827}
828
