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Commit | Line | Data |
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f8621c6a MP |
1 | /* |
2 | * Copyright (c) 2016 Martin Pieuchot <mpi@openbsd.org> | |
3 | * | |
4 | * Permission to use, copy, modify, and distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #include <sys/param.h> | |
18 | #include <sys/types.h> | |
19 | #include <sys/stat.h> | |
20 | #include <sys/exec_elf.h> | |
21 | #include <sys/mman.h> | |
37e1dc0c | 22 | #include <sys/ctf.h> |
f8621c6a MP |
23 | |
24 | #include <err.h> | |
25 | #include <fcntl.h> | |
26 | #include <locale.h> | |
27 | #include <stdio.h> | |
28 | #include <stdint.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
31 | #include <unistd.h> | |
32 | ||
33 | #ifdef ZLIB | |
34 | #include <zlib.h> | |
35 | #endif /* ZLIB */ | |
36 | ||
74b86e22 MP |
37 | #ifndef nitems |
38 | #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0])) | |
39 | #endif | |
40 | ||
f8621c6a MP |
41 | #define DUMP_OBJECT (1 << 0) |
42 | #define DUMP_FUNCTION (1 << 1) | |
43 | #define DUMP_HEADER (1 << 2) | |
751fc09a | 44 | #define DUMP_LABEL (1 << 3) |
80c28199 | 45 | #define DUMP_STRTAB (1 << 4) |
74b86e22 MP |
46 | #define DUMP_STATISTIC (1 << 5) |
47 | #define DUMP_TYPE (1 << 6) | |
f8621c6a | 48 | |
c1bd258a | 49 | int dump(const char *, uint8_t); |
f8621c6a MP |
50 | int isctf(const char *, size_t); |
51 | __dead void usage(void); | |
52 | ||
c1bd258a | 53 | int ctf_dump(const char *, size_t, uint8_t); |
74b86e22 MP |
54 | unsigned int ctf_dump_type(struct ctf_header *, const char *, off_t, |
55 | unsigned int, unsigned int); | |
56 | const char *ctf_kind2name(unsigned short); | |
e7e4276e | 57 | const char *ctf_enc2name(unsigned short); |
f8621c6a MP |
58 | const char *ctf_off2name(struct ctf_header *, const char *, off_t, |
59 | unsigned int); | |
60 | ||
c1bd258a | 61 | int elf_dump(const char *, size_t, uint8_t); |
c36bfc0c MP |
62 | const char *elf_idx2sym(size_t *, unsigned char); |
63 | ||
64 | /* elf.c */ | |
65 | int iself(const char *, size_t); | |
f8621c6a MP |
66 | int elf_getshstrtab(const char *, size_t, const char **, size_t *); |
67 | int elf_getsymtab(const char *, const char *, size_t, | |
68 | const Elf_Sym **, size_t *); | |
2ef38d60 MP |
69 | int elf_getsection(const char *, const char *, const char *, |
70 | size_t, const char **, size_t *); | |
f8621c6a MP |
71 | |
72 | #ifdef ZLIB | |
73 | char *decompress(const char *, size_t, off_t); | |
74 | #endif /* ZLIB */ | |
75 | ||
76 | int | |
77 | main(int argc, char *argv[]) | |
78 | { | |
79 | const char *filename; | |
c1bd258a | 80 | uint8_t flags = 0; |
f8621c6a MP |
81 | int ch, error = 0; |
82 | ||
83 | setlocale(LC_ALL, ""); | |
84 | ||
53477564 | 85 | while ((ch = getopt(argc, argv, "dfhlst")) != -1) { |
f8621c6a | 86 | switch (ch) { |
9fe3b2c8 MP |
87 | case 'd': |
88 | flags |= DUMP_OBJECT; | |
89 | break; | |
acada86d MP |
90 | case 'f': |
91 | flags |= DUMP_FUNCTION; | |
92 | break; | |
f8621c6a MP |
93 | case 'h': |
94 | flags |= DUMP_HEADER; | |
95 | break; | |
751fc09a MP |
96 | case 'l': |
97 | flags |= DUMP_LABEL; | |
98 | break; | |
80c28199 MP |
99 | case 's': |
100 | flags |= DUMP_STRTAB; | |
101 | break; | |
74b86e22 MP |
102 | case 't': |
103 | flags |= DUMP_TYPE; | |
104 | break; | |
f8621c6a MP |
105 | default: |
106 | usage(); | |
107 | } | |
108 | } | |
109 | ||
110 | argc -= optind; | |
111 | argv += optind; | |
112 | ||
c1bd258a MP |
113 | /* Dump everything by default */ |
114 | if (flags == 0) | |
115 | flags = 0xff; | |
116 | ||
f8621c6a MP |
117 | while ((filename = *argv++) != NULL) |
118 | error |= dump(filename, flags); | |
119 | ||
120 | return error; | |
121 | } | |
122 | ||
123 | int | |
c1bd258a | 124 | dump(const char *path, uint8_t flags) |
f8621c6a MP |
125 | { |
126 | struct stat st; | |
127 | int fd, error = 1; | |
128 | char *p; | |
129 | ||
130 | fd = open(path, O_RDONLY); | |
131 | if (fd == -1) { | |
132 | warn("open"); | |
133 | return 1; | |
134 | } | |
135 | if (fstat(fd, &st) == -1) { | |
136 | warn("fstat"); | |
137 | return 1; | |
138 | } | |
139 | if (st.st_size < (off_t)sizeof(struct ctf_header)) { | |
140 | warnx("file too small to be CTF"); | |
141 | return 1; | |
142 | } | |
143 | if ((uintmax_t)st.st_size > SIZE_MAX) { | |
144 | warnx("file too big to fit memory"); | |
145 | return 1; | |
146 | } | |
147 | ||
148 | p = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
149 | if (p == MAP_FAILED) | |
150 | err(1, "mmap"); | |
151 | ||
152 | if (iself(p, st.st_size)) { | |
153 | error = elf_dump(p, st.st_size, flags); | |
154 | } else if (isctf(p, st.st_size)) { | |
155 | error = ctf_dump(p, st.st_size, flags); | |
156 | } | |
157 | ||
158 | munmap(p, st.st_size); | |
159 | close(fd); | |
160 | ||
161 | return error; | |
162 | } | |
163 | ||
f8621c6a MP |
164 | const char *strtab; |
165 | const Elf_Sym *symtab; | |
166 | size_t strtabsize, nsymb; | |
167 | ||
9fe3b2c8 MP |
168 | const char * |
169 | elf_idx2sym(size_t *idx, unsigned char type) | |
170 | { | |
171 | const Elf_Sym *st; | |
172 | size_t i; | |
173 | ||
174 | for (i = *idx + 1; i < nsymb; i++) { | |
175 | st = &symtab[i]; | |
176 | ||
177 | if (ELF_ST_TYPE(st->st_info) != type) | |
178 | continue; | |
179 | ||
180 | *idx = i; | |
181 | return strtab + st->st_name; | |
182 | } | |
183 | ||
184 | return NULL; | |
185 | } | |
186 | ||
f8621c6a | 187 | int |
c1bd258a | 188 | elf_dump(const char *p, size_t filesize, uint8_t flags) |
f8621c6a MP |
189 | { |
190 | Elf_Ehdr *eh = (Elf_Ehdr *)p; | |
191 | Elf_Shdr *sh; | |
192 | const char *shstrtab; | |
193 | size_t i, shstrtabsize; | |
194 | ||
195 | /* Find section header string table location and size. */ | |
196 | if (elf_getshstrtab(p, filesize, &shstrtab, &shstrtabsize)) | |
197 | return 1; | |
198 | ||
199 | /* Find symbol table location and number of symbols. */ | |
200 | if (elf_getsymtab(p, shstrtab, shstrtabsize, &symtab, &nsymb)) | |
201 | warnx("symbol table not found"); | |
202 | ||
203 | /* Find string table location and size. */ | |
2ef38d60 | 204 | if (elf_getsection(p, ELF_STRTAB, shstrtab, shstrtabsize, &strtab, &strtabsize)) |
f8621c6a MP |
205 | warnx("string table not found"); |
206 | ||
207 | /* Find CTF section and dump it. */ | |
208 | for (i = 0; i < eh->e_shnum; i++) { | |
209 | sh = (Elf_Shdr *)(p + eh->e_shoff + i * eh->e_shentsize); | |
210 | ||
211 | if ((sh->sh_link >= eh->e_shnum) || | |
212 | (sh->sh_name >= shstrtabsize)) | |
213 | continue; | |
214 | ||
6d70f1d9 | 215 | if (strncmp(shstrtab + sh->sh_name, ELF_CTF, strlen(ELF_CTF))) |
f8621c6a MP |
216 | continue; |
217 | ||
218 | if (!isctf(p + sh->sh_offset, sh->sh_size)) | |
219 | break; | |
220 | ||
221 | return ctf_dump(p + sh->sh_offset, sh->sh_size, flags); | |
222 | } | |
223 | ||
6d70f1d9 | 224 | warnx("%s section not found", ELF_CTF); |
f8621c6a MP |
225 | return 1; |
226 | } | |
227 | ||
228 | int | |
229 | isctf(const char *p, size_t filesize) | |
230 | { | |
231 | struct ctf_header *cth = (struct ctf_header *)p; | |
232 | off_t dlen = cth->cth_stroff + cth->cth_strlen; | |
233 | ||
234 | if (cth->cth_magic != CTF_MAGIC || cth->cth_version != CTF_VERSION) | |
235 | return 0; | |
236 | ||
237 | if (dlen > filesize && !(cth->cth_flags & CTF_F_COMPRESS)) { | |
238 | warnx("bogus file size"); | |
239 | return 0; | |
240 | } | |
241 | ||
242 | if ((cth->cth_lbloff & 3) || (cth->cth_objtoff & 1) || | |
243 | (cth->cth_funcoff & 1) || (cth->cth_typeoff & 3)) { | |
244 | warnx("wrongly aligned offset"); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | if ((cth->cth_lbloff >= dlen) || (cth->cth_objtoff >= dlen) || | |
249 | (cth->cth_funcoff >= dlen) || (cth->cth_typeoff >= dlen)) { | |
250 | warnx("truncated file"); | |
251 | return 0; | |
252 | } | |
253 | ||
254 | if ((cth->cth_lbloff > cth->cth_objtoff) || | |
255 | (cth->cth_objtoff > cth->cth_funcoff) || | |
256 | (cth->cth_funcoff > cth->cth_typeoff) || | |
257 | (cth->cth_typeoff > cth->cth_stroff)) { | |
258 | warnx("corrupted file"); | |
259 | return 0; | |
260 | } | |
261 | ||
262 | return 1; | |
263 | } | |
264 | ||
265 | int | |
c1bd258a | 266 | ctf_dump(const char *p, size_t size, uint8_t flags) |
f8621c6a MP |
267 | { |
268 | struct ctf_header *cth = (struct ctf_header *)p; | |
f8621c6a | 269 | off_t dlen = cth->cth_stroff + cth->cth_strlen; |
b51bd0d8 | 270 | char *data; |
f8621c6a MP |
271 | |
272 | if (cth->cth_flags & CTF_F_COMPRESS) { | |
273 | data = decompress(p + sizeof(*cth), size - sizeof(*cth), dlen); | |
274 | if (data == NULL) | |
275 | return 1; | |
b51bd0d8 MP |
276 | } else { |
277 | data = (char *)p + sizeof(*cth); | |
f8621c6a MP |
278 | } |
279 | ||
280 | if (flags & DUMP_HEADER) { | |
6befd992 MP |
281 | printf(" cth_magic = 0x%04x\n", cth->cth_magic); |
282 | printf(" cth_version = %d\n", cth->cth_version); | |
283 | printf(" cth_flags = 0x%02x\n", cth->cth_flags); | |
284 | printf(" cth_parlabel = %s\n", | |
f8621c6a | 285 | ctf_off2name(cth, data, dlen, cth->cth_parname)); |
6befd992 | 286 | printf(" cth_parname = %s\n", |
f8621c6a | 287 | ctf_off2name(cth, data, dlen, cth->cth_parname)); |
6befd992 MP |
288 | printf(" cth_lbloff = %d\n", cth->cth_lbloff); |
289 | printf(" cth_objtoff = %d\n", cth->cth_objtoff); | |
290 | printf(" cth_funcoff = %d\n", cth->cth_funcoff); | |
291 | printf(" cth_typeoff = %d\n", cth->cth_typeoff); | |
292 | printf(" cth_stroff = %d\n", cth->cth_stroff); | |
293 | printf(" cth_strlen = %d\n", cth->cth_strlen); | |
294 | printf("\n"); | |
f8621c6a MP |
295 | } |
296 | ||
751fc09a MP |
297 | if (flags & DUMP_LABEL) { |
298 | unsigned int lbloff = cth->cth_lbloff; | |
299 | struct ctf_lblent *ctl; | |
300 | ||
301 | while (lbloff < cth->cth_objtoff) { | |
302 | ctl = (struct ctf_lblent *)(data + lbloff); | |
303 | ||
6befd992 | 304 | printf(" %5u %s\n", ctl->ctl_typeidx, |
751fc09a MP |
305 | ctf_off2name(cth, data, dlen, ctl->ctl_label)); |
306 | ||
307 | lbloff += sizeof(*ctl); | |
308 | } | |
6befd992 | 309 | printf("\n"); |
751fc09a MP |
310 | } |
311 | ||
9fe3b2c8 MP |
312 | if (flags & DUMP_OBJECT) { |
313 | unsigned int objtoff = cth->cth_objtoff; | |
314 | size_t idx = 0, i = 0; | |
315 | unsigned short *dsp; | |
316 | const char *s; | |
317 | int l; | |
318 | ||
319 | while (objtoff < cth->cth_funcoff) { | |
320 | dsp = (unsigned short *)(data + objtoff); | |
321 | ||
6befd992 | 322 | l = printf(" [%zu] %u", i++, *dsp); |
9fe3b2c8 | 323 | if ((s = elf_idx2sym(&idx, STT_OBJECT)) != NULL) |
86e1759d | 324 | printf("%*s %s (%zu)\n", (14 - l), "", s, idx); |
9fe3b2c8 MP |
325 | else |
326 | printf("\n"); | |
327 | ||
328 | objtoff += sizeof(*dsp); | |
329 | } | |
ac25938b | 330 | printf("\n"); |
9fe3b2c8 MP |
331 | } |
332 | ||
acada86d MP |
333 | if (flags & DUMP_FUNCTION) { |
334 | unsigned short *fsp, kind, vlen; | |
ae3b8a21 | 335 | size_t idx = 0, i = -1; |
acada86d MP |
336 | const char *s; |
337 | int l; | |
338 | ||
339 | fsp = (unsigned short *)(data + cth->cth_funcoff); | |
340 | while (fsp < (unsigned short *)(data + cth->cth_typeoff)) { | |
341 | kind = CTF_INFO_KIND(*fsp); | |
342 | vlen = CTF_INFO_VLEN(*fsp); | |
ae3b8a21 | 343 | s = elf_idx2sym(&idx, STT_FUNC); |
acada86d | 344 | fsp++; |
ae3b8a21 | 345 | i++; |
acada86d MP |
346 | |
347 | if (kind == CTF_K_UNKNOWN && vlen == 0) | |
348 | continue; | |
349 | ||
ae3b8a21 MP |
350 | l = printf(" [%zu] FUNC ", i); |
351 | if (s != NULL) | |
86e1759d | 352 | printf("(%s)", s); |
acada86d MP |
353 | printf(" returns: %u args: (", *fsp++); |
354 | while (vlen-- > 0) | |
355 | printf("%u%s", *fsp++, (vlen > 0) ? ", " : ""); | |
356 | printf(")\n"); | |
357 | } | |
6befd992 | 358 | printf("\n"); |
acada86d MP |
359 | } |
360 | ||
11b30cfc MP |
361 | if (flags & DUMP_TYPE) { |
362 | unsigned int idx = 1, offset = cth->cth_typeoff; | |
363 | ||
364 | while (offset < cth->cth_stroff) { | |
365 | offset += ctf_dump_type(cth, data, dlen, offset, idx++); | |
366 | } | |
367 | printf("\n"); | |
368 | } | |
369 | ||
80c28199 MP |
370 | if (flags & DUMP_STRTAB) { |
371 | unsigned int offset = 0; | |
372 | const char *str; | |
373 | ||
374 | while (offset < cth->cth_strlen) { | |
3093320c | 375 | str = ctf_off2name(cth, data, dlen, offset); |
80c28199 | 376 | |
6befd992 | 377 | printf(" [%u] ", offset); |
3093320c | 378 | if (strcmp(str, "(anon)")) |
80c28199 MP |
379 | offset += printf("%s\n", str); |
380 | else { | |
381 | printf("\\0\n"); | |
382 | offset++; | |
383 | } | |
384 | } | |
6befd992 | 385 | printf("\n"); |
80c28199 MP |
386 | } |
387 | ||
f8621c6a MP |
388 | if (cth->cth_flags & CTF_F_COMPRESS) |
389 | free(data); | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
74b86e22 MP |
394 | unsigned int |
395 | ctf_dump_type(struct ctf_header *cth, const char *data, off_t dlen, | |
396 | unsigned int offset, unsigned int idx) | |
397 | { | |
5cae2a5e | 398 | const char *p = data + offset; |
23543ec6 | 399 | const struct ctf_type *ctt = (struct ctf_type *)p; |
e7e4276e MP |
400 | const struct ctf_array *cta; |
401 | unsigned short *argp, i, kind, vlen, root; | |
23543ec6 | 402 | unsigned int eob, toff; |
74b86e22 MP |
403 | uint64_t size; |
404 | const char *name, *kname; | |
405 | ||
74b86e22 MP |
406 | kind = CTF_INFO_KIND(ctt->ctt_info); |
407 | vlen = CTF_INFO_VLEN(ctt->ctt_info); | |
408 | root = CTF_INFO_ISROOT(ctt->ctt_info); | |
409 | name = ctf_off2name(cth, data, dlen, ctt->ctt_name); | |
410 | ||
411 | if (root) | |
6befd992 | 412 | printf(" <%u> ", idx); |
74b86e22 | 413 | else |
6befd992 | 414 | printf(" [%u] ", idx); |
74b86e22 MP |
415 | |
416 | if ((kname = ctf_kind2name(kind)) != NULL) | |
417 | printf("%s %s", kname, name); | |
418 | ||
419 | if (ctt->ctt_size <= CTF_MAX_SIZE) { | |
420 | size = ctt->ctt_size; | |
421 | toff = sizeof(struct ctf_stype); | |
422 | } else { | |
423 | size = CTF_TYPE_LSIZE(ctt); | |
424 | toff = sizeof(struct ctf_type); | |
425 | } | |
426 | ||
427 | switch (kind) { | |
428 | case CTF_K_UNKNOWN: | |
429 | case CTF_K_FORWARD: | |
430 | break; | |
431 | case CTF_K_INTEGER: | |
e7e4276e | 432 | eob = *((unsigned int *)(p + toff)); |
23543ec6 | 433 | toff += sizeof(unsigned int); |
e7e4276e MP |
434 | printf(" encoding=%s offset=%u bits=%u", |
435 | ctf_enc2name(CTF_INT_ENCODING(eob)), CTF_INT_OFFSET(eob), | |
23543ec6 | 436 | CTF_INT_BITS(eob)); |
74b86e22 MP |
437 | break; |
438 | case CTF_K_FLOAT: | |
e7e4276e | 439 | eob = *((unsigned int *)(p + toff)); |
23543ec6 MP |
440 | toff += sizeof(unsigned int); |
441 | printf(" encoding=0x%x offset=%u bits=%u", | |
442 | CTF_FP_ENCODING(eob), CTF_FP_OFFSET(eob), CTF_FP_BITS(eob)); | |
74b86e22 MP |
443 | break; |
444 | case CTF_K_ARRAY: | |
e7e4276e MP |
445 | cta = (struct ctf_array *)(p + toff); |
446 | printf(" content: %u index: %u nelems: %u\n", cta->cta_contents, | |
447 | cta->cta_index, cta->cta_nelems); | |
23543ec6 | 448 | toff += sizeof(struct ctf_array); |
74b86e22 MP |
449 | break; |
450 | case CTF_K_FUNCTION: | |
e7e4276e MP |
451 | argp = (unsigned short *)(p + toff); |
452 | printf(" returns: %u args: (%u", ctt->ctt_type, *argp); | |
453 | for (i = 1; i < vlen; i++) { | |
454 | argp++; | |
455 | printf(", %u", *argp); | |
456 | } | |
457 | printf(")"); | |
23543ec6 | 458 | toff += (vlen + (vlen & 1)) * sizeof(unsigned short); |
74b86e22 MP |
459 | break; |
460 | case CTF_K_STRUCT: | |
461 | case CTF_K_UNION: | |
23543ec6 MP |
462 | printf(" (%llu bytes)\n", size); |
463 | ||
464 | if (size < CTF_LSTRUCT_THRESH) { | |
465 | for (i = 0; i < vlen; i++) { | |
466 | struct ctf_member *ctm; | |
467 | ||
468 | ctm = (struct ctf_member *)(p + toff); | |
469 | toff += sizeof(struct ctf_member); | |
470 | ||
471 | printf("\t%s type=%u off=%u\n", | |
472 | ctf_off2name(cth, data, dlen, | |
473 | ctm->ctm_name), | |
474 | ctm->ctm_type, ctm->ctm_offset); | |
475 | } | |
476 | } else { | |
477 | for (i = 0; i < vlen; i++) { | |
478 | struct ctf_lmember *ctlm; | |
479 | ||
480 | ctlm = (struct ctf_lmember *)(p + toff); | |
481 | toff += sizeof(struct ctf_lmember); | |
482 | ||
483 | printf("\t%s type=%u off=%llu\n", | |
484 | ctf_off2name(cth, data, dlen, | |
485 | ctlm->ctlm_name), | |
486 | ctlm->ctlm_type, CTF_LMEM_OFFSET(ctlm)); | |
487 | } | |
488 | } | |
74b86e22 MP |
489 | break; |
490 | case CTF_K_ENUM: | |
23543ec6 MP |
491 | printf("\n"); |
492 | for (i = 0; i < vlen; i++) { | |
493 | struct ctf_enum *cte; | |
494 | ||
495 | cte = (struct ctf_enum *)(p + toff); | |
496 | toff += sizeof(struct ctf_enum); | |
497 | ||
498 | printf("\t%s = %u\n", | |
499 | ctf_off2name(cth, data, dlen, cte->cte_name), | |
500 | cte->cte_value); | |
501 | } | |
74b86e22 MP |
502 | break; |
503 | case CTF_K_POINTER: | |
74b86e22 MP |
504 | case CTF_K_TYPEDEF: |
505 | case CTF_K_VOLATILE: | |
506 | case CTF_K_CONST: | |
507 | case CTF_K_RESTRICT: | |
508 | printf(" refers to %u", ctt->ctt_type); | |
509 | break; | |
510 | default: | |
511 | errx(1, "incorrect type %u at offset %u", kind, offset); | |
512 | } | |
513 | ||
514 | printf("\n"); | |
515 | ||
23543ec6 | 516 | return toff; |
74b86e22 MP |
517 | } |
518 | ||
519 | const char * | |
520 | ctf_kind2name(unsigned short kind) | |
521 | { | |
522 | static const char *kind_name[] = { NULL, "INTEGER", "FLOAT", "POINTER", | |
e7e4276e | 523 | "ARRAY", "FUNCTION", "STRUCT", "UNION", "ENUM", "FORWARD", |
74b86e22 MP |
524 | "TYPEDEF", "VOLATILE", "CONST", "RESTRICT" }; |
525 | ||
526 | if (kind >= nitems(kind_name)) | |
527 | return NULL; | |
528 | ||
529 | return kind_name[kind]; | |
530 | } | |
531 | ||
e7e4276e MP |
532 | const char * |
533 | ctf_enc2name(unsigned short enc) | |
534 | { | |
535 | static const char *enc_name[] = { "SIGNED", "CHAR", "SIGNED CHAR", | |
536 | "BOOL", "SIGNED BOOL" }; | |
537 | static char invalid[7]; | |
538 | ||
539 | if (enc == CTF_INT_VARARGS) | |
540 | return "VARARGS"; | |
541 | ||
542 | if (enc > 0 && enc < nitems(enc_name)) | |
543 | return enc_name[enc - 1]; | |
544 | ||
545 | snprintf(invalid, sizeof(invalid), "0x%x", enc); | |
546 | return invalid; | |
547 | } | |
548 | ||
f8621c6a MP |
549 | const char * |
550 | ctf_off2name(struct ctf_header *cth, const char *data, off_t dlen, | |
551 | unsigned int offset) | |
552 | { | |
553 | const char *name; | |
554 | ||
555 | if (CTF_NAME_STID(offset) != CTF_STRTAB_0) | |
556 | return "external"; | |
557 | ||
558 | if (CTF_NAME_OFFSET(offset) >= cth->cth_strlen) | |
559 | return "exceeds strlab"; | |
560 | ||
561 | if (cth->cth_stroff + CTF_NAME_OFFSET(offset) >= dlen) | |
562 | return "invalid"; | |
563 | ||
564 | name = data + cth->cth_stroff + CTF_NAME_OFFSET(offset); | |
565 | if (*name == '\0') | |
566 | return "(anon)"; | |
567 | ||
568 | return name; | |
569 | } | |
570 | ||
571 | char * | |
572 | decompress(const char *buf, size_t size, off_t len) | |
573 | { | |
574 | #ifdef ZLIB | |
575 | z_stream stream; | |
576 | char *data; | |
577 | int error; | |
578 | ||
579 | data = malloc(len); | |
580 | if (data == NULL) { | |
581 | warn(NULL); | |
582 | return NULL; | |
583 | } | |
584 | ||
585 | memset(&stream, 0, sizeof(stream)); | |
586 | stream.next_in = (void *)buf; | |
587 | stream.avail_in = size; | |
588 | stream.next_out = data; | |
589 | stream.avail_out = len; | |
590 | ||
591 | if ((error = inflateInit(&stream)) != Z_OK) { | |
592 | warnx("zlib inflateInit failed: %s", zError(error)); | |
593 | goto exit; | |
594 | } | |
595 | ||
596 | if ((error = inflate(&stream, Z_FINISH)) != Z_STREAM_END) { | |
597 | warnx("zlib inflate failed: %s", zError(error)); | |
8aa77ab4 | 598 | inflateEnd(&stream); |
f8621c6a MP |
599 | goto exit; |
600 | } | |
601 | ||
602 | if ((error = inflateEnd(&stream)) != Z_OK) { | |
603 | warnx("zlib inflateEnd failed: %s", zError(error)); | |
604 | goto exit; | |
605 | } | |
606 | ||
607 | if (stream.total_out != len) { | |
608 | warnx("decompression failed: %llu != %llu", | |
609 | stream.total_out, len); | |
610 | goto exit; | |
611 | } | |
612 | ||
613 | return data; | |
614 | ||
615 | exit: | |
616 | free(data); | |
617 | #endif /* ZLIB */ | |
618 | return NULL; | |
619 | } | |
620 | ||
621 | __dead void | |
622 | usage(void) | |
623 | { | |
624 | extern char *__progname; | |
625 | ||
53477564 | 626 | fprintf(stderr, "usage: %s [-dfhlst] [file ...]\n", |
f8621c6a MP |
627 | __progname); |
628 | exit(1); | |
629 | } | |
630 |