/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.198 Revision 1.229
1/* 1/*
2 * Copyright 2003-2007 Gentoo Foundation 2 * Copyright 2003-2007 Gentoo Foundation
3 * Distributed under the terms of the GNU General Public License v2 3 * Distributed under the terms of the GNU General Public License v2
4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.198 2008/11/17 18:09:55 flameeyes Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $
5 * 5 *
6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10static const char *rcsid = "$Id: scanelf.c,v 1.198 2008/11/17 18:09:55 flameeyes Exp $"; 10static const char *rcsid = "$Id: scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $";
11const char * const argv0 = "scanelf"; 11const char argv0[] = "scanelf";
12 12
13#include "paxinc.h" 13#include "paxinc.h"
14 14
15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
16 16
17/* prototypes */ 17/* prototypes */
18static int file_matches_list(const char *filename, char **matchlist); 18static int file_matches_list(const char *filename, char **matchlist);
19static int scanelf_elfobj(elfobj *elf);
20static int scanelf_elf(const char *filename, int fd, size_t len);
21static int scanelf_archive(const char *filename, int fd, size_t len);
22static int scanelf_file(const char *filename, const struct stat *st_cache);
23static int scanelf_dir(const char *path);
24static void scanelf_ldpath(void);
25static void scanelf_envpath(void);
26static void usage(int status);
27static char **get_split_env(const char *envvar);
28static void parseenv(void);
29static int parseargs(int argc, char *argv[]);
30static int rematch(const char *regex, const char *match, int cflags);
31 19
32/* variables to control behavior */ 20/* variables to control behavior */
33static char match_etypes[126] = ""; 21static char *match_etypes = NULL;
34static char *ldpaths[256]; 22static array_t _ldpaths = array_init_decl, *ldpaths = &_ldpaths;
35static char scan_ldpath = 0; 23static char scan_ldpath = 0;
36static char scan_envpath = 0; 24static char scan_envpath = 0;
37static char scan_symlink = 1; 25static char scan_symlink = 1;
38static char scan_archives = 0; 26static char scan_archives = 0;
39static char dir_recurse = 0; 27static char dir_recurse = 0;
57static char be_verbose = 0; 45static char be_verbose = 0;
58static char be_wewy_wewy_quiet = 0; 46static char be_wewy_wewy_quiet = 0;
59static char be_semi_verbose = 0; 47static char be_semi_verbose = 0;
60static char *find_sym = NULL; 48static char *find_sym = NULL;
61static char *find_lib = NULL; 49static char *find_lib = NULL;
50static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
62static char *find_section = NULL; 51static char *find_section = NULL;
52static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
63static char *out_format = NULL; 53static char *out_format = NULL;
64static char *search_path = NULL; 54static char *search_path = NULL;
65static char fix_elf = 0; 55static char fix_elf = 0;
66static char g_match = 0; 56static char g_match = 0;
67static char use_ldcache = 0; 57static char use_ldcache = 0;
68 58
69static char **qa_textrels = NULL; 59static char **qa_textrels = NULL;
70static char **qa_execstack = NULL; 60static char **qa_execstack = NULL;
71static char **qa_wx_load = NULL; 61static char **qa_wx_load = NULL;
62static char *root;
72 63
73int match_bits = 0; 64static int match_bits = 0;
74unsigned int match_perms = 0; 65static unsigned int match_perms = 0;
75caddr_t ldcache = 0; 66static void *ldcache = NULL;
76size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
77unsigned long setpax = 0UL; 68static unsigned long setpax = 0UL;
78 69
79int has_objdump = 0; 70static int has_objdump = 0;
80
81static char *getstr_perms(const char *fname);
82static char *getstr_perms(const char *fname)
83{
84 struct stat st;
85 static char buf[8];
86
87 if ((stat(fname, &st)) == (-1))
88 return (char *) "";
89
90 snprintf(buf, sizeof(buf), "%o", st.st_mode);
91
92 return (char *) buf + 2;
93}
94 71
95/* find the path to a file by name */ 72/* find the path to a file by name */
96static char *which(const char *fname) 73static char *which(const char *fname)
97{ 74{
98 static char fullpath[BUFSIZ]; 75 static char fullpath[__PAX_UTILS_PATH_MAX];
99 char *path, *p; 76 char *path, *p;
100 77
101 path = getenv("PATH"); 78 path = getenv("PATH");
102 if (!path) 79 if (!path)
103 return NULL; 80 return NULL;
104 81
105 path = xstrdup(path); 82 path = xstrdup(path);
106 while ((p = strrchr(path, ':')) != NULL) { 83 while ((p = strrchr(path, ':')) != NULL) {
107 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname); 84 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
108 *p = 0; 85 *p = 0;
109 if (access(fullpath, R_OK) != (-1)) { 86 if (access(fullpath, R_OK) != -1) {
110 free(path); 87 free(path);
111 return (char *) fullpath; 88 return fullpath;
112 } 89 }
113 } 90 }
114 free(path); 91 free(path);
115 return NULL; 92 return NULL;
116} 93}
142 119
143/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
144static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
145{ 122{
146 /* find the best SHT_DYNSYM and SHT_STRTAB sections */ 123 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
124
125 /* debug sections */
126 void *symtab = elf_findsecbyname(elf, ".symtab");
127 void *strtab = elf_findsecbyname(elf, ".strtab");
128 /* runtime sections */
129 void *dynsym = elf_findsecbyname(elf, ".dynsym");
130 void *dynstr = elf_findsecbyname(elf, ".dynstr");
131
147#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
148 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
149 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
150 /* debug sections */ \
151 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
152 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
153 /* runtime sections */ \
154 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
155 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
156 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
157 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
158 } else { \ 138 } else \
159 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
160 } \
161 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
162 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
163 } else { \ 144 } else \
164 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
165 } \
166 } 146 }
167 GET_SYMTABS(32) 147 GET_SYMTABS(32)
168 GET_SYMTABS(64) 148 GET_SYMTABS(64)
169} 149}
170 150
294 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
295 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
296 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
297 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
298 char *str; \ 278 char *str; \
299 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
300 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
301 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
302 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
303 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
304 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
359 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
360 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
361 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 341 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
362 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
363 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
364 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
365 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
366 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 346 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
367 *found_textrel = 1; \ 347 *found_textrel = 1; \
368 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
369 return (be_wewy_wewy_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
414 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
415 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
416 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
417 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
418 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
419 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
420 rela = NULL; \ 400 rela = NULL; \
421 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
422 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
423 rel = NULL; \ 403 rel = NULL; \
424 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
425 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
426 } else \ 406 } else \
427 continue; \ 407 continue; \
428 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
429 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
444 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
445 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
446 } else \ 426 } else \
447 *found_textrels = 1; \ 427 *found_textrels = 1; \
448 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
449 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
450 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
451 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
452 continue; \ 432 continue; \
453 } \ 433 } \
454 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
455 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
458 sym = NULL; \ 438 sym = NULL; \
459 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
460 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
461 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
462 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
463 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \ 443 printf("%s", elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
464 else \ 444 else \
465 printf("(memory/data?)"); \ 445 printf("(memory/data?)"); \
466 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
467 /* now try to find the closest symbol that this rel is probably in */ \ 447 /* now try to find the closest symbol that this rel is probably in */ \
468 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
469 func = NULL; \ 449 func = NULL; \
470 offset_tmp = 0; \ 450 offset_tmp = 0; \
471 while (sym_max--) { \ 451 while (sym_max--) { \
472 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \ 452 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
473 func = sym; \ 453 func = sym; \
487 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 467 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
488 if (be_verbose && has_objdump) { \ 468 if (be_verbose && has_objdump) { \
489 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \ 469 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
490 char *sysbuf; \ 470 char *sysbuf; \
491 size_t syslen; \ 471 size_t syslen; \
472 int sysret; \
492 const char sysfmt[] = "objdump -r -R -d -w -l --start-address=0x%lX --stop-address=0x%lX %s | grep --color -i -C 3 '.*[[:space:]]%lX:[[:space:]]*R_.*'\n"; \ 473 const char sysfmt[] = "objdump -r -R -d -w -l --start-address=0x%lX --stop-address=0x%lX %s | grep --color -i -C 3 '.*[[:space:]]%lX:[[:space:]]*R_.*'\n"; \
493 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \ 474 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
494 sysbuf = xmalloc(syslen); \ 475 sysbuf = xmalloc(syslen); \
495 if (end_addr < r_offset) \ 476 if (end_addr < r_offset) \
496 /* not uncommon when things are optimized out */ \ 477 /* not uncommon when things are optimized out */ \
499 (unsigned long)offset_tmp, \ 480 (unsigned long)offset_tmp, \
500 (unsigned long)end_addr, \ 481 (unsigned long)end_addr, \
501 elf->filename, \ 482 elf->filename, \
502 (unsigned long)r_offset); \ 483 (unsigned long)r_offset); \
503 fflush(stdout); \ 484 fflush(stdout); \
504 system(sysbuf); \ 485 sysret = system(sysbuf); \
505 fflush(stdout); \ 486 fflush(stdout); \
506 free(sysbuf); \ 487 free(sysbuf); \
507 } \ 488 } \
508 } \ 489 } \
509 } } 490 } }
514 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename); 495 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
515 496
516 return NULL; 497 return NULL;
517} 498}
518 499
519static void rpath_security_checks(elfobj *, char *, const char *);
520static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type) 500static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
521{ 501{
522 struct stat st; 502 struct stat st;
523 switch (*item) { 503 switch (*item) {
524 case '/': break; 504 case '/': break;
540 break; 520 break;
541 } 521 }
542} 522}
543static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) 523static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
544{ 524{
545 unsigned long i, s; 525 unsigned long i;
546 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
547 void *strtbl_void; 527 void *strtbl_void;
548 528
549 if (!show_rpath) return; 529 if (!show_rpath) return;
550 530
565 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
566 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 546 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
567 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
568 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
569 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
570 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
571 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
572 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
573 r = &rpath; \ 553 r = &rpath; \
574 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
575 r = &runpath; \ 555 r = &runpath; \
579 } \ 559 } \
580 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
581 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
582 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
583 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
584 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
585 /* cache the length in case we need to nuke this section later on */ \ 565 /* cache the length in case we need to nuke this section later on */ \
586 if (fix_elf) \ 566 if (fix_elf) \
587 offset = strlen(*r); \ 567 offset = strlen(*r); \
588 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
589 if (be_quiet) { \ 569 if (be_quiet) { \
595 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
596 while (start) { \ 576 while (start) { \
597 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
598 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
599 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
600 if (use_ldcache) \ 580 if (use_ldcache) { \
601 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
602 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
603 *r = end; \ 585 *r = end; \
604 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
605 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
606 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
607 (*r)++; \ 589 (*r)++; \
608 break; \ 590 break; \
609 } \ 591 } \
592 } \
610 if (!*r || !end) \ 593 if (!*r || !end) \
611 break; \ 594 break; \
612 else \ 595 else \
613 start = start + len + 1; \ 596 start = start + len + 1; \
614 } \ 597 } \
699#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
700#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
701#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
702#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
703 686
704static char *lookup_cache_lib(elfobj *, char *);
705
706#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
707 688
708static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
709{ 690{
710 int fd = 0; 691 int fd;
711 char *strs; 692 char *strs;
712 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
713 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
714 struct stat st; 695 struct stat st;
715 696
716 typedef struct { 697 typedef struct {
717 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
718 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
728 libentry_t *libent; 709 libentry_t *libent;
729 710
730 if (fname == NULL) 711 if (fname == NULL)
731 return NULL; 712 return NULL;
732 713
733 if (ldcache == 0) { 714 if (ldcache == NULL) {
734 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1) 715 if (stat(cachefile, &st))
716 return NULL;
717
718 fd = open(cachefile, O_RDONLY);
719 if (fd == -1)
735 return NULL; 720 return NULL;
736 721
737 /* cache these values so we only map/unmap the cache file once */ 722 /* cache these values so we only map/unmap the cache file once */
738 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
739 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
740
741 close(fd); 725 close(fd);
742 726
743 if (ldcache == (caddr_t)-1) { 727 if (ldcache == MAP_FAILED) {
744 ldcache = 0; 728 ldcache = NULL;
745 return NULL; 729 return NULL;
746 } 730 }
747 731
748 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN)) 732 if (memcmp(header->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN) ||
733 memcmp(header->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
734 {
735 munmap(ldcache, ldcache_size);
736 ldcache = NULL;
749 return NULL; 737 return NULL;
750 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
751 return NULL;
752 } 738 }
739 } else
740 header = ldcache;
753 741
754 header = (header_t *) ldcache;
755 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
756 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
757 744
758 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
759 /* this should be more fine grained, but for now we assume that 746 /* This should be more fine grained, but for now we assume that
760 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
761 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
762 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
763 continue; 751 continue;
764 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
765 continue; 753 continue;
766 754
767 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
768 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
769 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
770 } 761 }
762
771 return buf; 763 return buf;
772} 764}
765
773#elif defined(__NetBSD__) 766#elif defined(__NetBSD__)
774static char *lookup_cache_lib(elfobj *elf, char *fname) 767static char *lookup_cache_lib(elfobj *elf, char *fname)
775{ 768{
776 static char buf[__PAX_UTILS_PATH_MAX] = ""; 769 static char buf[__PAX_UTILS_PATH_MAX] = "";
777 static struct stat st; 770 static struct stat st;
778 771 size_t n;
779 char **ldpath; 772 char *ldpath;
780 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 773
774 array_for_each(ldpath, n, ldpath) {
781 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", *ldpath, fname) >= sizeof(buf)) 775 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", ldpath, fname) >= sizeof(buf))
782 continue; /* if the pathname is too long, or something went wrong, ignore */ 776 continue; /* if the pathname is too long, or something went wrong, ignore */
783 777
784 if (stat(buf, &st) != 0) 778 if (stat(buf, &st) != 0)
785 continue; /* if the lib doesn't exist in *ldpath, look further */ 779 continue; /* if the lib doesn't exist in *ldpath, look further */
786 780
810 unsigned long i; 804 unsigned long i;
811 char *needed; 805 char *needed;
812 void *strtbl_void; 806 void *strtbl_void;
813 char *p; 807 char *p;
814 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
815 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
816 815
817 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
818 817
819 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
820#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
822 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
823 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
824 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
825 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
826 Elf ## B ## _Off offset; \ 825 Elf ## B ## _Off offset; \
826 size_t matched = 0; \
827 /* Walk all the program headers to find the PT_DYNAMIC */ \
827 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
828 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 829 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) \
830 continue; \
829 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
830 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 832 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) \
833 continue; \
834 /* Walk all the dynamic tags to find NEEDED entries */ \
831 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
832 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
833 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
834 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
835 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
836 ++dyn; \ 840 ++dyn; \
837 continue; \ 841 continue; \
838 } \ 842 } \
839 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
840 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
841 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
842 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
843 if (use_ldcache) \ 848 if (use_ldcache) \
844 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
845 needed = p; \ 850 needed = p; \
846 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
847 } \ 852 } \
848 *found_needed = 1; \ 853 *found_needed = 1; \
849 } else { \ 854 } else { \
850 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \ 855 /* -N -> print matching entries */ \
856 size_t n; \
857 const char *find_lib_name; \
858 \
859 array_for_each(find_lib_arr, n, find_lib_name) \
860 if (!strcmp(find_lib_name, needed)) \
861 ++matched; \
862 \
863 if (matched == array_cnt(find_lib_arr)) { \
851 *found_lib = 1; \ 864 *found_lib = 1; \
852 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
853 } \ 866 } \
854 } \ 867 } \
855 } \ 868 } \
856 ++dyn; \ 869 ++dyn; \
857 } \ 870 } \
902 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
903 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 916 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
904 dynamic = 1; \ 917 dynamic = 1; \
905 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
906 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
907 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
908 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
909 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
910 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \ 923 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
911 { \ 924 { \
912 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
925 /* don't output anything if quiet mode and the ELF is static or not setuid */ 938 /* don't output anything if quiet mode and the ELF is static or not setuid */
926 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) { 939 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
927 return NULL; 940 return NULL;
928 } else { 941 } else {
929 *found_bind = 1; 942 *found_bind = 1;
930 return (char *) (dynamic ? "LAZY" : "STATIC"); 943 return (char *)(dynamic ? "LAZY" : "STATIC");
931 } 944 }
932} 945}
933static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
934{ 947{
935 unsigned long i; 948 unsigned long i;
953 return NULL; \ 966 return NULL; \
954 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
955 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 968 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
956 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
957 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
958 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
959 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
960 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
961 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
962 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
963 ++dyn; \ 976 ++dyn; \
964 continue; \ 977 continue; \
965 } \ 978 } \
966 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
967 *found_soname = 1; \ 980 *found_soname = 1; \
968 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
969 } \ 982 } \
970 ++dyn; \ 983 ++dyn; \
971 } \ 984 } \
975 } 988 }
976 989
977 return NULL; 990 return NULL;
978} 991}
979 992
980static int scanelf_match_symname(const char *symname, const char *tomatch) { 993/*
981 /* We do things differently when checking with regexp */ 994 * We support the symbol form:
982 if (g_match) { 995 * [%[modifiers]%][[+-]<symbol name>][,[.....]]
983 return rematch(symname, tomatch, REG_EXTENDED) == 0; 996 * If the symbol name is empty, then all symbols are matched.
997 * If the symbol name is a glob ("*"), then all symbols are dumped (debug).
998 * Do not rely on this output format at all.
999 * Otherwise the symbol name is used to search (either regex or string compare).
1000 * If the first char of the symbol name is a plus ("+"), then only match
1001 * defined symbols. If it's a minus ("-"), only match undefined symbols.
1002 * Putting modifiers in between the percent signs allows for more in depth
1003 * filters. There are groups of modifiers. If you don't specify a member
1004 * of a group, then all types in that group are matched. The current
1005 * groups and their types are:
1006 * STT group: STT_NOTYPE:n STT_OBJECT:o STT_FUNC:f SST_FILE:F
1007 * STB group: STB_LOCAL:l STB_GLOBAL:g STB_WEAK:w
1008 * SHN group: SHN_UNDEF:u SHN_ABS:a SHN_COMMON:c {defined}:d
1009 * The "defined" value in the SHN group does not correspond to a SHN_xxx define.
1010 * You can search for multiple symbols at once by seperating with a comma (",").
1011 *
1012 * Some examples:
1013 * ELFs with a weak function "foo":
1014 * scanelf -s %wf%foo <ELFs>
1015 * ELFs that define the symbol "main":
1016 * scanelf -s +main <ELFs>
1017 * scanelf -s %d%main <ELFs>
1018 * ELFs that refer to the undefined symbol "brk":
1019 * scanelf -s -brk <ELFs>
1020 * scanelf -s %u%brk <ELFs>
1021 * All global defined objects in an ELF:
1022 * scanelf -s %ogd% <ELF>
1023 */
1024static void
1025scanelf_match_symname(elfobj *elf, char *found_sym, char **ret, size_t *ret_len, const char *symname,
1026 unsigned int stt, unsigned int stb, unsigned int shn, unsigned long size)
1027{
1028 char *this_sym, *next_sym, saved = saved;
1029
1030 /* allow the user to specify a comma delimited list of symbols to search for */
1031 next_sym = NULL;
1032 do {
1033 bool inc_notype, inc_object, inc_func, inc_file,
1034 inc_local, inc_global, inc_weak,
1035 inc_def, inc_undef, inc_abs, inc_common;
1036
1037 if (next_sym) {
1038 next_sym[-1] = saved;
1039 this_sym = next_sym;
1040 } else
1041 this_sym = find_sym;
1042 if ((next_sym = strchr(this_sym, ','))) {
1043 /* make parsing easier by killing the comma temporarily */
1044 saved = *next_sym;
1045 *next_sym = '\0';
1046 next_sym += 1;
1047 }
1048
1049 /* symbol selection! */
1050 inc_notype = inc_object = inc_func = inc_file = \
1051 inc_local = inc_global = inc_weak = \
1052 inc_def = inc_undef = inc_abs = inc_common = \
1053 (*this_sym != '%');
1054
1055 /* parse the contents of %...% */
1056 if (!inc_notype) {
1057 while (*(this_sym++)) {
1058 if (*this_sym == '%') {
1059 ++this_sym;
1060 break;
1061 }
1062 switch (*this_sym) {
1063 case 'n': inc_notype = true; break;
1064 case 'o': inc_object = true; break;
1065 case 'f': inc_func = true; break;
1066 case 'F': inc_file = true; break;
1067 case 'l': inc_local = true; break;
1068 case 'g': inc_global = true; break;
1069 case 'w': inc_weak = true; break;
1070 case 'd': inc_def = true; break;
1071 case 'u': inc_undef = true; break;
1072 case 'a': inc_abs = true; break;
1073 case 'c': inc_common = true; break;
1074 default: err("invalid symbol selector '%c'", *this_sym);
1075 }
1076 }
1077
1078 /* If no types are matched, not match all */
1079 if (!inc_notype && !inc_object && !inc_func && !inc_file)
1080 inc_notype = inc_object = inc_func = inc_file = true;
1081 if (!inc_local && !inc_global && !inc_weak)
1082 inc_local = inc_global = inc_weak = true;
1083 if (!inc_def && !inc_undef && !inc_abs && !inc_common)
1084 inc_def = inc_undef = inc_abs = inc_common = true;
1085
1086 /* backwards compat for defined/undefined short hand */
1087 } else if (*this_sym == '+') {
1088 inc_undef = false;
1089 ++this_sym;
1090 } else if (*this_sym == '-') {
1091 inc_def = inc_abs = inc_common = false;
1092 ++this_sym;
1093 }
1094
1095 /* filter symbols */
1096 if ((!inc_notype && stt == STT_NOTYPE) || \
1097 (!inc_object && stt == STT_OBJECT) || \
1098 (!inc_func && stt == STT_FUNC ) || \
1099 (!inc_file && stt == STT_FILE ) || \
1100 (!inc_local && stb == STB_LOCAL ) || \
1101 (!inc_global && stb == STB_GLOBAL) || \
1102 (!inc_weak && stb == STB_WEAK ) || \
1103 (!inc_def && shn && shn < SHN_LORESERVE) || \
1104 (!inc_undef && shn == SHN_UNDEF ) || \
1105 (!inc_abs && shn == SHN_ABS ) || \
1106 (!inc_common && shn == SHN_COMMON))
1107 continue;
1108
1109 if (*this_sym == '*') {
1110 /* a "*" symbol gets you debug output */
1111 printf("%s(%s) %5lX %15s %15s %15s %s\n",
1112 ((*found_sym == 0) ? "\n\t" : "\t"),
1113 elf->base_filename,
1114 size,
1115 get_elfstttype(stt),
1116 get_elfstbtype(stb),
1117 get_elfshntype(shn),
1118 symname);
1119 goto matched;
1120
984 } else { 1121 } else {
1122 if (g_match) {
1123 /* regex match the symbol */
1124 if (rematch(this_sym, symname, REG_EXTENDED) != 0)
1125 continue;
1126
1127 } else if (*this_sym) {
1128 /* give empty symbols a "pass", else do a normal compare */
985 const size_t symname_len = strlen(symname); 1129 const size_t len = strlen(this_sym);
986 return (strncmp(symname, tomatch, symname_len) == 0 && 1130 if (!(strncmp(this_sym, symname, len) == 0 &&
987 /* Accept unversioned symbol names */ 1131 /* Accept unversioned symbol names */
988 (tomatch[symname_len] == '\0' || tomatch[symname_len] == '@')); 1132 (symname[len] == '\0' || symname[len] == '@')))
1133 continue;
1134 }
1135
1136 if (be_semi_verbose) {
1137 char buf[1024];
1138 snprintf(buf, sizeof(buf), "%lX %s %s",
1139 size,
1140 get_elfstttype(stt),
1141 this_sym);
1142 *ret = xstrdup(buf);
1143 } else {
1144 if (*ret) xchrcat(ret, ',', ret_len);
1145 xstrcat(ret, symname, ret_len);
1146 }
1147
1148 goto matched;
989 } 1149 }
990} 1150 } while (next_sym);
991 1151
1152 return;
1153
1154 matched:
1155 *found_sym = 1;
1156 if (next_sym)
1157 next_sym[-1] = saved;
1158}
1159
992static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
993{ 1161{
994 unsigned long i; 1162 unsigned long i;
995 char *ret; 1163 char *ret;
996 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
997 1165
998 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
999 ret = find_sym; 1167 ret = NULL;
1000 1168
1001 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
1002 1170
1003 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
1004#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
1005 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
1006 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
1007 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
1008 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 1176 Elf ## B ## _Sym *sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
1009 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
1010 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
1011 if (cnt) \ 1180 if (cnt) \
1012 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
1013 for (i = 0; i < cnt; ++i) { \ 1182 for (i = 0; i < cnt; ++i) { \
1014 if ((void*)sym > (void*)elf->data_end) { \ 1183 if ((void*)sym > elf->data_end) { \
1015 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \ 1184 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1016 goto break_out; \ 1185 goto break_out; \
1017 } \ 1186 } \
1018 if (sym->st_name) { \ 1187 if (sym->st_name) { \
1019 /* make sure the symbol name is in acceptable memory range */ \ 1188 /* make sure the symbol name is in acceptable memory range */ \
1020 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
1021 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
1022 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
1023 ++sym; \ 1192 ++sym; \
1024 continue; \ 1193 continue; \
1025 } \ 1194 } \
1026 /* debug display ... show all symbols and some extra info */ \ 1195 scanelf_match_symname(elf, found_sym, \
1027 if (0 && g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \ 1196 &ret, &ret_len, symname, \
1028 printf("%s(%s) %5lX %15s %s %s\n", \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
1029 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
1030 elf->base_filename, \ 1199 EGET(sym->st_shndx), \
1031 (unsigned long)sym->st_size, \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
1032 get_elfstttype(sym->st_info), \ 1201 EGET(sym->st_size)); \
1033 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1034 *found_sym = 1; \
1035 } else { \
1036 /* allow the user to specify a comma delimited list of symbols to search for */ \
1037 char *this_sym, *next_sym; \
1038 next_sym = ret; \
1039 while (next_sym) { \
1040 this_sym = next_sym; \
1041 if ((next_sym = strchr(this_sym, ','))) \
1042 next_sym += 1; /* Skip the comma */ \
1043 /* do we want a defined symbol ? */ \
1044 if (*this_sym == '+') { \
1045 if (sym->st_shndx == SHN_UNDEF) \
1046 continue; \
1047 ++this_sym; \
1048 /* do we want an undefined symbol ? */ \
1049 } else if (*this_sym == '-') { \
1050 if (sym->st_shndx != SHN_UNDEF) \
1051 continue; \
1052 ++this_sym; \
1053 } \
1054 if (next_sym) /* Copy it so that we don't have to worry about the final , */ \
1055 this_sym = strndup(this_sym, next_sym-this_sym); \
1056 /* ok, lets compare the name now */ \
1057 if (scanelf_match_symname(this_sym, symname)) { \
1058 if (be_semi_verbose) { \
1059 char buf[126]; \
1060 snprintf(buf, sizeof(buf), "%lX %s %s", \
1061 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1062 ret = buf; \
1063 } else \
1064 ret = symname; \
1065 (*found_sym)++; \
1066 goto break_out; \
1067 } \
1068 if (next_sym) free(this_sym); \
1069 } \
1070 } \
1071 } \ 1202 } \
1072 ++sym; \ 1203 ++sym; \
1073 } } 1204 } }
1074 FIND_SYM(32) 1205 FIND_SYM(32)
1075 FIND_SYM(64) 1206 FIND_SYM(64)
1081 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
1082 return ret; 1213 return ret;
1083 if (be_quiet) 1214 if (be_quiet)
1084 return NULL; 1215 return NULL;
1085 else 1216 else
1086 return (char *)" - "; 1217 return " - ";
1087} 1218}
1088 1219
1089static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1090{ 1221{
1091 if (!find_section) 1222 if (!find_section)
1092 return NULL; 1223 return NULL;
1093 1224
1094#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
1095 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1096 int invert; \ 1228 int invert; \
1229 const char *section_name; \
1097 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1098 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
1099 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1100 if ((section == NULL && invert) || (section != NULL && !invert)) \ 1236 if ((section == NULL && invert) || (section != NULL && !invert)) \
1237 ++matched; \
1238 } \
1239 \
1240 if (matched == array_cnt(find_section_arr)) \
1101 *found_section = 1; \ 1241 *found_section = 1; \
1102 } 1242 }
1103 FIND_SECTION(32) 1243 FIND_SECTION(32)
1104 FIND_SECTION(64) 1244 FIND_SECTION(64)
1105 1245
1110 return find_section; 1250 return find_section;
1111 1251
1112 if (be_quiet) 1252 if (be_quiet)
1113 return NULL; 1253 return NULL;
1114 else 1254 else
1115 return (char *)" - "; 1255 return " - ";
1116} 1256}
1117 1257
1118/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1119#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1120static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1121{ 1261{
1122 unsigned long i; 1262 unsigned long i;
1123 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1124 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
1235 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1236 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break; 1376 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
1237 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 1377 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1238 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break; 1378 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1239 case 'D': out = get_endian(elf); break; 1379 case 'D': out = get_endian(elf); break;
1240 case 'O': out = getstr_perms(elf->filename); break; 1380 case 'O': out = strfileperms(elf->filename); break;
1241 case 'n': 1381 case 'n':
1242 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; 1382 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
1243 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1244 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1245 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1249 case 'I': out = get_elfosabi(elf); break; 1389 case 'I': out = get_elfosabi(elf); break;
1250 case 'Y': out = get_elf_eabi(elf); break; 1390 case 'Y': out = get_elf_eabi(elf); break;
1251 case 'Z': snprintf(ubuf, sizeof(ubuf), "%lu", (unsigned long)elf->len); out = ubuf; break;; 1391 case 'Z': snprintf(ubuf, sizeof(ubuf), "%lu", (unsigned long)elf->len); out = ubuf; break;;
1252 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1253 } 1393 }
1254 if (out) { 1394 if (out)
1255 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1256 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1257 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1258 else
1259 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1260 }
1261 } 1396 }
1262 1397
1263#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1264 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1265 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1297 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1298 goto label_done; 1433 goto label_done;
1299 break; 1434 break;
1300 default: break; 1435 default: break;
1301 } 1436 }
1302 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1303 char sbuf[126]; 1438 char sbuf[126];
1304 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1305 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1306 char *p; 1441 char *p;
1307 while ((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1332 1467
1333 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1334 if (ar == NULL) 1469 if (ar == NULL)
1335 return 1; 1470 return 1;
1336 1471
1337 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0); 1472 ar_buffer = mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1338 while ((m=ar_next(ar)) != NULL) { 1473 while ((m = ar_next(ar)) != NULL) {
1474 off_t cur_pos = lseek(fd, 0, SEEK_CUR);
1475 if (cur_pos == -1)
1476 errp("lseek() failed");
1339 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size); 1477 elf = readelf_buffer(m->name, ar_buffer + cur_pos, m->size);
1340 if (elf) { 1478 if (elf) {
1341 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1342 unreadelf(elf); 1480 unreadelf(elf);
1343 } 1481 }
1344 } 1482 }
1378 1516
1379 close(fd); 1517 close(fd);
1380 return 0; 1518 return 0;
1381} 1519}
1382 1520
1521static const char *maybe_add_root(const char *fname, char *buf)
1522{
1523 if (root && strncmp(fname, root, strlen(root))) {
1524 strcpy(buf, root);
1525 strncat(buf, fname, __PAX_UTILS_PATH_MAX - strlen(root) - 1);
1526 fname = buf;
1527 }
1528 return fname;
1529}
1530
1383/* scan a directory for ET_EXEC files and print when we find one */ 1531/* scan a directory for ET_EXEC files and print when we find one */
1384static int scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1385{ 1533{
1386 register DIR *dir; 1534 register DIR *dir;
1387 register struct dirent *dentry; 1535 register struct dirent *dentry;
1388 struct stat st_top, st; 1536 struct stat st_top, st;
1389 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1390 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1391 int ret = 0; 1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1392 1543
1393 /* make sure path exists */ 1544 /* make sure path exists */
1394 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1395 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1396 return 1; 1547 return 1;
1460static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1461{ 1612{
1462 FILE *fp = NULL; 1613 FILE *fp = NULL;
1463 char *p; 1614 char *p;
1464 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1465 1617
1466 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1467 return i;
1468 1619
1469 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1470 return i; 1621 return i;
1471 1622
1472 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1473 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1474 *p = 0; 1625 *p = 0;
1475 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1476 *p = 0; 1627 *p = 0;
1477#ifdef __linux__ 1628
1478 /* recursive includes of the same file will make this segfault. */ 1629 /* recursive includes of the same file will make this segfault. */
1479 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1480 glob64_t gl; 1631 glob_t gl;
1481 size_t x; 1632 size_t x;
1482 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1483 1634
1484 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1485 1638
1486 if (path[8] != '/') 1639 if (path[8] != '/')
1487 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1488 else 1641 else
1489 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1490 1643
1491 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1492 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1493 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1494 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1495 continue; 1648 continue;
1496 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1497 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1498 globfree64(&gl);
1499 return i;
1500 }
1501 } 1650 }
1502 globfree64 (&gl); 1651 globfree(&gl);
1503 continue; 1652 continue;
1504 } 1653 }
1505 } 1654 }
1506#endif 1655
1507 if (*path != '/') 1656 if (*path != '/')
1508 continue; 1657 continue;
1509 1658
1510 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1511
1512 if (i + 1 == ARRAY_SIZE(ldpaths))
1513 break;
1514 } 1660 }
1515 ldpaths[i] = NULL;
1516 1661
1517 fclose(fp); 1662 fclose(fp);
1518 return i; 1663 return i;
1519} 1664}
1520 1665
1521#elif defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1522 1667
1523static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1524{ 1669{
1525 FILE *fp = NULL; 1670 FILE *fp = NULL;
1526 char *b = NULL, *p; 1671 char *b = NULL, *p;
1527 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1528 1674
1529 if (i + 1 == ARRAY_SIZE(ldpaths)) 1675 fname = maybe_add_root(fname, _fname);
1530 return i;
1531 1676
1532 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1533 return i; 1678 return i;
1534 1679
1535 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1546 free(b); 1691 free(b);
1547 return i; 1692 return i;
1548 } 1693 }
1549 1694
1550 while ((p = strsep(&b, ":"))) { 1695 while ((p = strsep(&b, ":"))) {
1551 if (*p == '\0') continue; 1696 if (*p == '\0')
1552 ldpaths[i++] = xstrdup(p); 1697 continue;
1553 1698 xarraypush(ldpaths, p, strlen(p));
1554 if (i + 1 == ARRAY_SIZE(ldpaths))
1555 break;
1556 } 1699 }
1557 ldpaths[i] = NULL;
1558 1700
1559 free(b); 1701 free(b);
1560 fclose(fp); 1702 fclose(fp);
1561 return i; 1703 return i;
1562} 1704}
1565#ifdef __ELF__ 1707#ifdef __ELF__
1566#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1567#endif 1709#endif
1568static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1569{ 1711{
1570 memset(ldpaths, 0x00, sizeof(ldpaths));
1571 return 0; 1712 return 0;
1572} 1713}
1573#endif 1714#endif
1574 1715
1575/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1576static void scanelf_ldpath(void) 1717static void scanelf_ldpath(void)
1577{ 1718{
1578 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1579 int i = 0; 1722 int i = 0;
1580 1723
1581 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1582 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1583 1726
1584 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1585 1728
1586 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1587 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1588 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1589 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1590 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1591 ++i; 1734 ++i;
1592 } 1735 }
1593 1736
1594 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1595 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1612 } 1755 }
1613 1756
1614 free(path); 1757 free(path);
1615} 1758}
1616 1759
1617/* usage / invocation handling functions */ /* Free Flags: c d j u w C G H J K P Q U W */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1618#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZBhV" 1761#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZCBhV"
1619#define a_argument required_argument 1762#define a_argument required_argument
1620static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1621 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1622 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1623 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1624 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1625 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1626 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1627 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1651 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1652 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1653 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1654 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1655 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1656 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1657 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1658 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1659 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1660}; 1805};
1661 1806
1662static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1663 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1664 "Scan all directories in /etc/ld.so.conf", 1809 "Scan all directories in /etc/ld.so.conf",
1810 "Root directory (use with -l or -p)",
1665 "Scan directories recursively", 1811 "Scan directories recursively",
1666 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1667 "Don't scan symlinks", 1813 "Don't scan symlinks",
1668 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1669 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1678 "Print BIND information", 1824 "Print BIND information",
1679 "Print SONAME information", 1825 "Print SONAME information",
1680 "Find a specified symbol", 1826 "Find a specified symbol",
1681 "Find a specified section", 1827 "Find a specified section",
1682 "Find a specified library", 1828 "Find a specified library",
1683 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1684 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1685 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1686 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1687 "Print Endianness", 1833 "Print Endianness",
1688 "Print OSABI", 1834 "Print OSABI",
1689 "Print EABI (EM_ARM Only)", 1835 "Print EABI (EM_ARM Only)",
1690 "Print only ELF files matching octal permissions", 1836 "Print only ELF files matching octal permissions",
1691 "Print ELF file size", 1837 "Print ELF file size",
1692 "Print all scanned info (-x -e -t -r -b)\n", 1838 "Print all useful/simple info\n",
1693 "Only output 'bad' things", 1839 "Only output 'bad' things",
1694 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1695 "Use specified format for output", 1841 "Use specified format for output",
1696 "Read input stream from a filename", 1842 "Read input stream from a filename",
1697 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1698 "Don't display the header", 1845 "Don't display the header",
1699 "Print this help and exit", 1846 "Print this help and exit",
1700 "Print version and exit", 1847 "Print version and exit",
1701 NULL 1848 NULL
1702}; 1849};
1709 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0); 1856 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1710 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1711 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1712 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1713 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 1860 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1861 long_opts[i].name, opts_help[i]);
1862 else if (long_opts[i].val > '~')
1863 printf(" --%-7s <arg> * %s\n",
1714 long_opts[i].name, opts_help[i]); 1864 long_opts[i].name, opts_help[i]);
1715 else 1865 else
1716 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1717 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1718 1868
1749 case 'f': 1899 case 'f':
1750 if (from_file) warn("You prob don't want to specify -f twice"); 1900 if (from_file) warn("You prob don't want to specify -f twice");
1751 from_file = optarg; 1901 from_file = optarg;
1752 break; 1902 break;
1753 case 'E': 1903 case 'E':
1754 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1755 break; 1905 break;
1756 case 'M': 1906 case 'M':
1757 match_bits = atoi(optarg); 1907 match_bits = atoi(optarg);
1758 if (match_bits == 0) { 1908 if (match_bits == 0) {
1759 if (strcmp(optarg, "ELFCLASS32") == 0) 1909 if (strcmp(optarg, "ELFCLASS32") == 0)
1761 if (strcmp(optarg, "ELFCLASS64") == 0) 1911 if (strcmp(optarg, "ELFCLASS64") == 0)
1762 match_bits = 64; 1912 match_bits = 64;
1763 } 1913 }
1764 break; 1914 break;
1765 case 'O': 1915 case 'O':
1766 if (sscanf(optarg, "%o", &match_perms) == (-1)) 1916 if (sscanf(optarg, "%o", &match_perms) == -1)
1767 match_bits = 0; 1917 match_bits = 0;
1768 break; 1918 break;
1769 case 'o': { 1919 case 'o': {
1770 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1771 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1772 break; 1922 break;
1773 } 1923 }
1774 case 'k': 1924 case 'k':
1775 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1776 find_section = optarg;
1777 break; 1926 break;
1778 case 's': { 1927 case 's': {
1779 if (find_sym) warn("You prob don't want to specify -s twice"); 1928 if (find_sym) warn("You prob don't want to specify -s twice");
1780 find_sym = optarg; 1929 find_sym = optarg;
1781 break; 1930 break;
1782 } 1931 }
1783 case 'N': { 1932 case 'N':
1784 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1785 find_lib = optarg;
1786 break; 1934 break;
1787 }
1788
1789 case 'F': { 1935 case 'F': {
1790 if (out_format) warn("You prob don't want to specify -F twice"); 1936 if (out_format) warn("You prob don't want to specify -F twice");
1791 out_format = optarg; 1937 out_format = optarg;
1792 break; 1938 break;
1793 } 1939 }
1837 case 'Z': show_size = 1; break; 1983 case 'Z': show_size = 1; break;
1838 case 'g': g_match = 1; break; 1984 case 'g': g_match = 1; break;
1839 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1840 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1841 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1842 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1843 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1844 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1845 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1846 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1858 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1859 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break; 2006 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1860 case 'D': show_endian = 1; break; 2007 case 'D': show_endian = 1; break;
1861 case 'I': show_osabi = 1; break; 2008 case 'I': show_osabi = 1; break;
1862 case 'Y': show_eabi = 1; break; 2009 case 'Y': show_eabi = 1; break;
2010 case 128:
2011 root = optarg;
2012 break;
1863 case ':': 2013 case ':':
1864 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1865 case '?': 2015 case '?':
1866 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1867 default: 2017 default:
1870 } 2020 }
1871 if (show_textrels && be_verbose) { 2021 if (show_textrels && be_verbose) {
1872 if (which("objdump") != NULL) 2022 if (which("objdump") != NULL)
1873 has_objdump = 1; 2023 has_objdump = 1;
1874 } 2024 }
2025 /* flatten arrays for display */
2026 if (array_cnt(find_lib_arr))
2027 find_lib = array_flatten_str(find_lib_arr);
2028 if (array_cnt(find_section_arr))
2029 find_section = array_flatten_str(find_section_arr);
1875 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1876 if (out_format) { 2031 if (out_format) {
1877 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1878 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1879 show_textrels = show_perms = show_endian = show_size = \ 2034 show_textrels = show_perms = show_endian = show_size = \
1958 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1959 ret = scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1960 } 2115 }
1961 2116
1962 /* clean up */ 2117 /* clean up */
1963 for (i = 0; ldpaths[i]; ++i)
1964 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1965 2123
1966 if (ldcache != 0) 2124 if (ldcache != 0)
1967 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1968 return ret; 2126 return ret;
1969} 2127}
2002 return envvals; 2160 return envvals;
2003} 2161}
2004 2162
2005static void parseenv(void) 2163static void parseenv(void)
2006{ 2164{
2165 color_init(false);
2007 qa_textrels = get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
2008 qa_execstack = get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
2009 qa_wx_load = get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
2010} 2169}
2011 2170

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