/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.206 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 1.206 2008/12/30 13:34:46 vapier 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 1.206 2008/12/30 13:34:46 vapier 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
73static int match_bits = 0; 64static int match_bits = 0;
74static unsigned int match_perms = 0; 65static unsigned int match_perms = 0;
75static caddr_t ldcache = 0; 66static void *ldcache = NULL;
76static size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
77static unsigned long setpax = 0UL; 68static unsigned long setpax = 0UL;
78 69
79static int has_objdump = 0; 70static int has_objdump = 0;
80 71
81/* find the path to a file by name */ 72/* find the path to a file by name */
82static char *which(const char *fname) 73static char *which(const char *fname)
83{ 74{
84 static char fullpath[BUFSIZ]; 75 static char fullpath[__PAX_UTILS_PATH_MAX];
85 char *path, *p; 76 char *path, *p;
86 77
87 path = getenv("PATH"); 78 path = getenv("PATH");
88 if (!path) 79 if (!path)
89 return NULL; 80 return NULL;
128 119
129/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
130static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
131{ 122{
132 /* 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
133#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
134 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
135 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
136 /* debug sections */ \
137 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
138 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
139 /* runtime sections */ \
140 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
141 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
142 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
143 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
144 } else { \ 138 } else \
145 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
146 } \
147 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
148 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
149 } else { \ 144 } else \
150 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
151 } \
152 } 146 }
153 GET_SYMTABS(32) 147 GET_SYMTABS(32)
154 GET_SYMTABS(64) 148 GET_SYMTABS(64)
155} 149}
156 150
280 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
281 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
282 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
283 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
284 char *str; \ 278 char *str; \
285 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
286 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
287 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
288 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
289 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
290 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
345 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
346 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
347 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; \
348 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
349 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
350 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
351 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
352 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)*/ \
353 *found_textrel = 1; \ 347 *found_textrel = 1; \
354 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
355 return (be_wewy_wewy_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
400 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
401 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
402 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
403 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
404 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
405 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
406 rela = NULL; \ 400 rela = NULL; \
407 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
408 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
409 rel = NULL; \ 403 rel = NULL; \
410 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
411 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
412 } else \ 406 } else \
413 continue; \ 407 continue; \
414 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
415 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
430 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
431 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
432 } else \ 426 } else \
433 *found_textrels = 1; \ 427 *found_textrels = 1; \
434 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
435 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
436 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
437 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
438 continue; \ 432 continue; \
439 } \ 433 } \
440 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
441 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
444 sym = NULL; \ 438 sym = NULL; \
445 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
446 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
447 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
448 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
449 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)); \
450 else \ 444 else \
451 printf("(memory/data?)"); \ 445 printf("(memory/data?)"); \
452 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
453 /* 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 */ \
454 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
455 func = NULL; \ 449 func = NULL; \
456 offset_tmp = 0; \ 450 offset_tmp = 0; \
457 while (sym_max--) { \ 451 while (sym_max--) { \
458 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) { \
459 func = sym; \ 453 func = sym; \
473 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 467 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
474 if (be_verbose && has_objdump) { \ 468 if (be_verbose && has_objdump) { \
475 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \ 469 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
476 char *sysbuf; \ 470 char *sysbuf; \
477 size_t syslen; \ 471 size_t syslen; \
472 int sysret; \
478 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"; \
479 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \ 474 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
480 sysbuf = xmalloc(syslen); \ 475 sysbuf = xmalloc(syslen); \
481 if (end_addr < r_offset) \ 476 if (end_addr < r_offset) \
482 /* not uncommon when things are optimized out */ \ 477 /* not uncommon when things are optimized out */ \
485 (unsigned long)offset_tmp, \ 480 (unsigned long)offset_tmp, \
486 (unsigned long)end_addr, \ 481 (unsigned long)end_addr, \
487 elf->filename, \ 482 elf->filename, \
488 (unsigned long)r_offset); \ 483 (unsigned long)r_offset); \
489 fflush(stdout); \ 484 fflush(stdout); \
490 system(sysbuf); \ 485 sysret = system(sysbuf); \
491 fflush(stdout); \ 486 fflush(stdout); \
492 free(sysbuf); \ 487 free(sysbuf); \
493 } \ 488 } \
494 } \ 489 } \
495 } } 490 } }
500 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);
501 496
502 return NULL; 497 return NULL;
503} 498}
504 499
505static void rpath_security_checks(elfobj *, char *, const char *);
506static 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)
507{ 501{
508 struct stat st; 502 struct stat st;
509 switch (*item) { 503 switch (*item) {
510 case '/': break; 504 case '/': break;
526 break; 520 break;
527 } 521 }
528} 522}
529static 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)
530{ 524{
531 unsigned long i, s; 525 unsigned long i;
532 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
533 void *strtbl_void; 527 void *strtbl_void;
534 528
535 if (!show_rpath) return; 529 if (!show_rpath) return;
536 530
551 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
552 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; \
553 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
554 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
555 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
556 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
557 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
558 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
559 r = &rpath; \ 553 r = &rpath; \
560 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
561 r = &runpath; \ 555 r = &runpath; \
565 } \ 559 } \
566 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
567 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
568 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
569 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
570 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
571 /* 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 */ \
572 if (fix_elf) \ 566 if (fix_elf) \
573 offset = strlen(*r); \ 567 offset = strlen(*r); \
574 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
575 if (be_quiet) { \ 569 if (be_quiet) { \
581 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
582 while (start) { \ 576 while (start) { \
583 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
584 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
585 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
586 if (use_ldcache) \ 580 if (use_ldcache) { \
587 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
588 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
589 *r = end; \ 585 *r = end; \
590 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
591 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
592 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
593 (*r)++; \ 589 (*r)++; \
594 break; \ 590 break; \
595 } \ 591 } \
592 } \
596 if (!*r || !end) \ 593 if (!*r || !end) \
597 break; \ 594 break; \
598 else \ 595 else \
599 start = start + len + 1; \ 596 start = start + len + 1; \
600 } \ 597 } \
685#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
686#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
687#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
688#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
689 686
690static char *lookup_cache_lib(elfobj *, char *);
691
692#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
693 688
694static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
695{ 690{
696 int fd = 0; 691 int fd;
697 char *strs; 692 char *strs;
698 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
699 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
700 struct stat st; 695 struct stat st;
701 696
702 typedef struct { 697 typedef struct {
703 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
704 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
714 libentry_t *libent; 709 libentry_t *libent;
715 710
716 if (fname == NULL) 711 if (fname == NULL)
717 return NULL; 712 return NULL;
718 713
719 if (ldcache == 0) { 714 if (ldcache == NULL) {
720 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)
721 return NULL; 720 return NULL;
722 721
723 /* 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 */
724 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
725 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
726
727 close(fd); 725 close(fd);
728 726
729 if (ldcache == MAP_FAILED) { 727 if (ldcache == MAP_FAILED) {
730 ldcache = 0; 728 ldcache = NULL;
731 return NULL; 729 return NULL;
732 } 730 }
733 731
734 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;
735 return NULL; 737 return NULL;
736 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
737 return NULL;
738 } 738 }
739 } else
740 header = ldcache;
739 741
740 header = (header_t *) ldcache;
741 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
742 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
743 744
744 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
745 /* 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
746 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
747 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
748 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
749 continue; 751 continue;
750 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
751 continue; 753 continue;
752 754
753 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
754 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
755 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
756 } 761 }
762
757 return buf; 763 return buf;
758} 764}
765
759#elif defined(__NetBSD__) 766#elif defined(__NetBSD__)
760static char *lookup_cache_lib(elfobj *elf, char *fname) 767static char *lookup_cache_lib(elfobj *elf, char *fname)
761{ 768{
762 static char buf[__PAX_UTILS_PATH_MAX] = ""; 769 static char buf[__PAX_UTILS_PATH_MAX] = "";
763 static struct stat st; 770 static struct stat st;
764 771 size_t n;
765 char **ldpath; 772 char *ldpath;
766 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 773
774 array_for_each(ldpath, n, ldpath) {
767 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))
768 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 */
769 777
770 if (stat(buf, &st) != 0) 778 if (stat(buf, &st) != 0)
771 continue; /* if the lib doesn't exist in *ldpath, look further */ 779 continue; /* if the lib doesn't exist in *ldpath, look further */
772 780
796 unsigned long i; 804 unsigned long i;
797 char *needed; 805 char *needed;
798 void *strtbl_void; 806 void *strtbl_void;
799 char *p; 807 char *p;
800 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
801 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
802 815
803 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
804 817
805 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
806#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
808 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
809 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
810 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
811 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
812 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 */ \
813 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
814 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; \
815 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
816 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 */ \
817 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
818 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
819 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
820 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
821 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
822 ++dyn; \ 840 ++dyn; \
823 continue; \ 841 continue; \
824 } \ 842 } \
825 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
826 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
827 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
828 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
829 if (use_ldcache) \ 848 if (use_ldcache) \
830 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
831 needed = p; \ 850 needed = p; \
832 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
833 } \ 852 } \
834 *found_needed = 1; \ 853 *found_needed = 1; \
835 } else { \ 854 } else { \
836 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)) { \
837 *found_lib = 1; \ 864 *found_lib = 1; \
838 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
839 } \ 866 } \
840 } \ 867 } \
841 } \ 868 } \
842 ++dyn; \ 869 ++dyn; \
843 } \ 870 } \
888 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
889 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; \
890 dynamic = 1; \ 917 dynamic = 1; \
891 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
892 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
893 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
894 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
895 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
896 (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)) \
897 { \ 924 { \
898 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
911 /* 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 */
912 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))))) {
913 return NULL; 940 return NULL;
914 } else { 941 } else {
915 *found_bind = 1; 942 *found_bind = 1;
916 return (char *) (dynamic ? "LAZY" : "STATIC"); 943 return (char *)(dynamic ? "LAZY" : "STATIC");
917 } 944 }
918} 945}
919static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
920{ 947{
921 unsigned long i; 948 unsigned long i;
939 return NULL; \ 966 return NULL; \
940 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
941 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; \
942 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
943 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
944 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
945 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
946 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
947 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
948 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
949 ++dyn; \ 976 ++dyn; \
950 continue; \ 977 continue; \
951 } \ 978 } \
952 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
953 *found_soname = 1; \ 980 *found_soname = 1; \
954 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
955 } \ 982 } \
956 ++dyn; \ 983 ++dyn; \
957 } \ 984 } \
961 } 988 }
962 989
963 return NULL; 990 return NULL;
964} 991}
965 992
966static int scanelf_match_symname(const char *symname, const char *tomatch) { 993/*
967 /* We do things differently when checking with regexp */ 994 * We support the symbol form:
968 if (g_match) { 995 * [%[modifiers]%][[+-]<symbol name>][,[.....]]
969 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
970 } 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 */
971 const size_t symname_len = strlen(symname); 1129 const size_t len = strlen(this_sym);
972 return (strncmp(symname, tomatch, symname_len) == 0 && 1130 if (!(strncmp(this_sym, symname, len) == 0 &&
973 /* Accept unversioned symbol names */ 1131 /* Accept unversioned symbol names */
974 (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;
975 } 1149 }
976} 1150 } while (next_sym);
977 1151
1152 return;
1153
1154 matched:
1155 *found_sym = 1;
1156 if (next_sym)
1157 next_sym[-1] = saved;
1158}
1159
978static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
979{ 1161{
980 unsigned long i; 1162 unsigned long i;
981 char *ret; 1163 char *ret;
982 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
983 1165
984 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
985 ret = find_sym; 1167 ret = NULL;
986 1168
987 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
988 1170
989 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
990#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
991 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
992 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
993 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
994 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)); \
995 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
996 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
997 if (cnt) \ 1180 if (cnt) \
998 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
999 for (i = 0; i < cnt; ++i) { \ 1182 for (i = 0; i < cnt; ++i) { \
1000 if ((void*)sym > (void*)elf->data_end) { \ 1183 if ((void*)sym > elf->data_end) { \
1001 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \ 1184 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1002 goto break_out; \ 1185 goto break_out; \
1003 } \ 1186 } \
1004 if (sym->st_name) { \ 1187 if (sym->st_name) { \
1005 /* make sure the symbol name is in acceptable memory range */ \ 1188 /* make sure the symbol name is in acceptable memory range */ \
1006 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
1007 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
1008 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
1009 ++sym; \ 1192 ++sym; \
1010 continue; \ 1193 continue; \
1011 } \ 1194 } \
1012 /* debug display ... show all symbols and some extra info */ \ 1195 scanelf_match_symname(elf, found_sym, \
1013 if (0 && g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \ 1196 &ret, &ret_len, symname, \
1014 printf("%s(%s) %5lX %15s %s %s\n", \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
1015 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
1016 elf->base_filename, \ 1199 EGET(sym->st_shndx), \
1017 (unsigned long)sym->st_size, \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
1018 get_elfstttype(sym->st_info), \ 1201 EGET(sym->st_size)); \
1019 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1020 *found_sym = 1; \
1021 } else { \
1022 /* allow the user to specify a comma delimited list of symbols to search for */ \
1023 char *this_sym, *next_sym; \
1024 next_sym = ret; \
1025 while (next_sym) { \
1026 this_sym = next_sym; \
1027 if ((next_sym = strchr(this_sym, ','))) \
1028 next_sym += 1; /* Skip the comma */ \
1029 /* do we want a defined symbol ? */ \
1030 if (*this_sym == '+') { \
1031 if (sym->st_shndx == SHN_UNDEF) \
1032 continue; \
1033 ++this_sym; \
1034 /* do we want an undefined symbol ? */ \
1035 } else if (*this_sym == '-') { \
1036 if (sym->st_shndx != SHN_UNDEF) \
1037 continue; \
1038 ++this_sym; \
1039 } \
1040 if (next_sym) /* Copy it so that we don't have to worry about the final , */ \
1041 this_sym = strndup(this_sym, next_sym-this_sym); \
1042 /* ok, lets compare the name now */ \
1043 if (scanelf_match_symname(this_sym, symname)) { \
1044 if (be_semi_verbose) { \
1045 char buf[126]; \
1046 snprintf(buf, sizeof(buf), "%lX %s %s", \
1047 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1048 ret = buf; \
1049 } else \
1050 ret = symname; \
1051 (*found_sym)++; \
1052 goto break_out; \
1053 } \
1054 if (next_sym) free(this_sym); \
1055 } \
1056 } \
1057 } \ 1202 } \
1058 ++sym; \ 1203 ++sym; \
1059 } } 1204 } }
1060 FIND_SYM(32) 1205 FIND_SYM(32)
1061 FIND_SYM(64) 1206 FIND_SYM(64)
1067 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
1068 return ret; 1213 return ret;
1069 if (be_quiet) 1214 if (be_quiet)
1070 return NULL; 1215 return NULL;
1071 else 1216 else
1072 return (char *)" - "; 1217 return " - ";
1073} 1218}
1074 1219
1075static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1076{ 1221{
1077 if (!find_section) 1222 if (!find_section)
1078 return NULL; 1223 return NULL;
1079 1224
1080#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
1081 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1082 int invert; \ 1228 int invert; \
1229 const char *section_name; \
1083 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1084 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
1085 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1086 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)) \
1087 *found_section = 1; \ 1241 *found_section = 1; \
1088 } 1242 }
1089 FIND_SECTION(32) 1243 FIND_SECTION(32)
1090 FIND_SECTION(64) 1244 FIND_SECTION(64)
1091 1245
1096 return find_section; 1250 return find_section;
1097 1251
1098 if (be_quiet) 1252 if (be_quiet)
1099 return NULL; 1253 return NULL;
1100 else 1254 else
1101 return (char *)" - "; 1255 return " - ";
1102} 1256}
1103 1257
1104/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1105#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1106static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1107{ 1261{
1108 unsigned long i; 1262 unsigned long i;
1109 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1110 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
1235 case 'I': out = get_elfosabi(elf); break; 1389 case 'I': out = get_elfosabi(elf); break;
1236 case 'Y': out = get_elf_eabi(elf); break; 1390 case 'Y': out = get_elf_eabi(elf); break;
1237 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;;
1238 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1239 } 1393 }
1240 if (out) { 1394 if (out)
1241 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1242 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1243 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1244 else
1245 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1246 }
1247 } 1396 }
1248 1397
1249#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1250 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1251 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1283 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1284 goto label_done; 1433 goto label_done;
1285 break; 1434 break;
1286 default: break; 1435 default: break;
1287 } 1436 }
1288 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1289 char sbuf[126]; 1438 char sbuf[126];
1290 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1291 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1292 char *p; 1441 char *p;
1293 while ((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1319 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1320 if (ar == NULL) 1469 if (ar == NULL)
1321 return 1; 1470 return 1;
1322 1471
1323 ar_buffer = 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);
1324 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");
1325 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);
1326 if (elf) { 1478 if (elf) {
1327 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1328 unreadelf(elf); 1480 unreadelf(elf);
1329 } 1481 }
1330 } 1482 }
1364 1516
1365 close(fd); 1517 close(fd);
1366 return 0; 1518 return 0;
1367} 1519}
1368 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
1369/* 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 */
1370static int scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1371{ 1533{
1372 register DIR *dir; 1534 register DIR *dir;
1373 register struct dirent *dentry; 1535 register struct dirent *dentry;
1374 struct stat st_top, st; 1536 struct stat st_top, st;
1375 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1376 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1377 int ret = 0; 1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1378 1543
1379 /* make sure path exists */ 1544 /* make sure path exists */
1380 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1381 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1382 return 1; 1547 return 1;
1446static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1447{ 1612{
1448 FILE *fp = NULL; 1613 FILE *fp = NULL;
1449 char *p; 1614 char *p;
1450 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1451 1617
1452 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1453 return i;
1454 1619
1455 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1456 return i; 1621 return i;
1457 1622
1458 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1459 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1460 *p = 0; 1625 *p = 0;
1461 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1462 *p = 0; 1627 *p = 0;
1463#ifdef __linux__ 1628
1464 /* recursive includes of the same file will make this segfault. */ 1629 /* recursive includes of the same file will make this segfault. */
1465 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1466 glob64_t gl; 1631 glob_t gl;
1467 size_t x; 1632 size_t x;
1468 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1469 1634
1470 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1471 1638
1472 if (path[8] != '/') 1639 if (path[8] != '/')
1473 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1474 else 1641 else
1475 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1476 1643
1477 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1478 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1479 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1480 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1481 continue; 1648 continue;
1482 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1483 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1484 globfree64(&gl);
1485 return i;
1486 }
1487 } 1650 }
1488 globfree64 (&gl); 1651 globfree(&gl);
1489 continue; 1652 continue;
1490 } 1653 }
1491 } 1654 }
1492#endif 1655
1493 if (*path != '/') 1656 if (*path != '/')
1494 continue; 1657 continue;
1495 1658
1496 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1497
1498 if (i + 1 == ARRAY_SIZE(ldpaths))
1499 break;
1500 } 1660 }
1501 ldpaths[i] = NULL;
1502 1661
1503 fclose(fp); 1662 fclose(fp);
1504 return i; 1663 return i;
1505} 1664}
1506 1665
1507#elif defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1508 1667
1509static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1510{ 1669{
1511 FILE *fp = NULL; 1670 FILE *fp = NULL;
1512 char *b = NULL, *p; 1671 char *b = NULL, *p;
1513 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1514 1674
1515 if (i + 1 == ARRAY_SIZE(ldpaths)) 1675 fname = maybe_add_root(fname, _fname);
1516 return i;
1517 1676
1518 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1519 return i; 1678 return i;
1520 1679
1521 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1532 free(b); 1691 free(b);
1533 return i; 1692 return i;
1534 } 1693 }
1535 1694
1536 while ((p = strsep(&b, ":"))) { 1695 while ((p = strsep(&b, ":"))) {
1537 if (*p == '\0') continue; 1696 if (*p == '\0')
1538 ldpaths[i++] = xstrdup(p); 1697 continue;
1539 1698 xarraypush(ldpaths, p, strlen(p));
1540 if (i + 1 == ARRAY_SIZE(ldpaths))
1541 break;
1542 } 1699 }
1543 ldpaths[i] = NULL;
1544 1700
1545 free(b); 1701 free(b);
1546 fclose(fp); 1702 fclose(fp);
1547 return i; 1703 return i;
1548} 1704}
1551#ifdef __ELF__ 1707#ifdef __ELF__
1552#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1553#endif 1709#endif
1554static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1555{ 1711{
1556 memset(ldpaths, 0x00, sizeof(ldpaths));
1557 return 0; 1712 return 0;
1558} 1713}
1559#endif 1714#endif
1560 1715
1561/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1562static void scanelf_ldpath(void) 1717static void scanelf_ldpath(void)
1563{ 1718{
1564 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1565 int i = 0; 1722 int i = 0;
1566 1723
1567 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1568 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1569 1726
1570 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1571 1728
1572 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1573 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1574 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1575 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1576 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1577 ++i; 1734 ++i;
1578 } 1735 }
1579 1736
1580 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1581 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1598 } 1755 }
1599 1756
1600 free(path); 1757 free(path);
1601} 1758}
1602 1759
1603/* 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 */
1604#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"
1605#define a_argument required_argument 1762#define a_argument required_argument
1606static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1607 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1608 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1609 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1610 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1611 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1612 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1613 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1637 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1638 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1639 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1640 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1641 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1642 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1643 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1644 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1645 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1646}; 1805};
1647 1806
1648static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1649 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1650 "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)",
1651 "Scan directories recursively", 1811 "Scan directories recursively",
1652 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1653 "Don't scan symlinks", 1813 "Don't scan symlinks",
1654 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1655 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1664 "Print BIND information", 1824 "Print BIND information",
1665 "Print SONAME information", 1825 "Print SONAME information",
1666 "Find a specified symbol", 1826 "Find a specified symbol",
1667 "Find a specified section", 1827 "Find a specified section",
1668 "Find a specified library", 1828 "Find a specified library",
1669 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1670 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1671 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1672 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1673 "Print Endianness", 1833 "Print Endianness",
1674 "Print OSABI", 1834 "Print OSABI",
1675 "Print EABI (EM_ARM Only)", 1835 "Print EABI (EM_ARM Only)",
1676 "Print only ELF files matching octal permissions", 1836 "Print only ELF files matching octal permissions",
1677 "Print ELF file size", 1837 "Print ELF file size",
1678 "Print all scanned info (-x -e -t -r -b)\n", 1838 "Print all useful/simple info\n",
1679 "Only output 'bad' things", 1839 "Only output 'bad' things",
1680 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1681 "Use specified format for output", 1841 "Use specified format for output",
1682 "Read input stream from a filename", 1842 "Read input stream from a filename",
1683 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1684 "Don't display the header", 1845 "Don't display the header",
1685 "Print this help and exit", 1846 "Print this help and exit",
1686 "Print version and exit", 1847 "Print version and exit",
1687 NULL 1848 NULL
1688}; 1849};
1695 "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);
1696 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1697 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1698 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1699 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",
1700 long_opts[i].name, opts_help[i]); 1864 long_opts[i].name, opts_help[i]);
1701 else 1865 else
1702 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1703 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1704 1868
1735 case 'f': 1899 case 'f':
1736 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");
1737 from_file = optarg; 1901 from_file = optarg;
1738 break; 1902 break;
1739 case 'E': 1903 case 'E':
1740 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1741 break; 1905 break;
1742 case 'M': 1906 case 'M':
1743 match_bits = atoi(optarg); 1907 match_bits = atoi(optarg);
1744 if (match_bits == 0) { 1908 if (match_bits == 0) {
1745 if (strcmp(optarg, "ELFCLASS32") == 0) 1909 if (strcmp(optarg, "ELFCLASS32") == 0)
1756 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1757 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1758 break; 1922 break;
1759 } 1923 }
1760 case 'k': 1924 case 'k':
1761 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1762 find_section = optarg;
1763 break; 1926 break;
1764 case 's': { 1927 case 's': {
1765 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");
1766 find_sym = optarg; 1929 find_sym = optarg;
1767 break; 1930 break;
1768 } 1931 }
1769 case 'N': { 1932 case 'N':
1770 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1771 find_lib = optarg;
1772 break; 1934 break;
1773 }
1774
1775 case 'F': { 1935 case 'F': {
1776 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");
1777 out_format = optarg; 1937 out_format = optarg;
1778 break; 1938 break;
1779 } 1939 }
1823 case 'Z': show_size = 1; break; 1983 case 'Z': show_size = 1; break;
1824 case 'g': g_match = 1; break; 1984 case 'g': g_match = 1; break;
1825 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1826 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1827 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1828 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1829 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1830 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1831 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1832 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1844 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1845 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;
1846 case 'D': show_endian = 1; break; 2007 case 'D': show_endian = 1; break;
1847 case 'I': show_osabi = 1; break; 2008 case 'I': show_osabi = 1; break;
1848 case 'Y': show_eabi = 1; break; 2009 case 'Y': show_eabi = 1; break;
2010 case 128:
2011 root = optarg;
2012 break;
1849 case ':': 2013 case ':':
1850 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1851 case '?': 2015 case '?':
1852 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1853 default: 2017 default:
1856 } 2020 }
1857 if (show_textrels && be_verbose) { 2021 if (show_textrels && be_verbose) {
1858 if (which("objdump") != NULL) 2022 if (which("objdump") != NULL)
1859 has_objdump = 1; 2023 has_objdump = 1;
1860 } 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);
1861 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1862 if (out_format) { 2031 if (out_format) {
1863 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1864 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1865 show_textrels = show_perms = show_endian = show_size = \ 2034 show_textrels = show_perms = show_endian = show_size = \
1944 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1945 ret = scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1946 } 2115 }
1947 2116
1948 /* clean up */ 2117 /* clean up */
1949 for (i = 0; ldpaths[i]; ++i)
1950 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1951 2123
1952 if (ldcache != 0) 2124 if (ldcache != 0)
1953 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1954 return ret; 2126 return ret;
1955} 2127}
1988 return envvals; 2160 return envvals;
1989} 2161}
1990 2162
1991static void parseenv(void) 2163static void parseenv(void)
1992{ 2164{
2165 color_init(false);
1993 qa_textrels = get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
1994 qa_execstack = get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
1995 qa_wx_load = get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
1996} 2169}
1997 2170

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