/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.205 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 1.205 2008/12/30 13:13:15 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 1.205 2008/12/30 13:13:15 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
81static const char *getstr_perms(const char *fname)
82{
83 struct stat st;
84 static char buf[8];
85
86 if (stat(fname, &st) == -1)
87 return "";
88
89 snprintf(buf, sizeof(buf), "%o", st.st_mode);
90
91 return buf + 2;
92}
93
94/* find the path to a file by name */ 72/* find the path to a file by name */
95static char *which(const char *fname) 73static char *which(const char *fname)
96{ 74{
97 static char fullpath[BUFSIZ]; 75 static char fullpath[__PAX_UTILS_PATH_MAX];
98 char *path, *p; 76 char *path, *p;
99 77
100 path = getenv("PATH"); 78 path = getenv("PATH");
101 if (!path) 79 if (!path)
102 return NULL; 80 return NULL;
141 119
142/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
143static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
144{ 122{
145 /* 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
146#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
147 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
148 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
149 /* debug sections */ \
150 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
151 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
152 /* runtime sections */ \
153 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
154 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
155 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
156 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
157 } else { \ 138 } else \
158 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
159 } \
160 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
161 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
162 } else { \ 144 } else \
163 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
164 } \
165 } 146 }
166 GET_SYMTABS(32) 147 GET_SYMTABS(32)
167 GET_SYMTABS(64) 148 GET_SYMTABS(64)
168} 149}
169 150
293 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
294 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
295 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
296 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
297 char *str; \ 278 char *str; \
298 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
299 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
300 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
301 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
302 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
303 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
358 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
359 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
360 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; \
361 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
362 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
363 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
364 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
365 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)*/ \
366 *found_textrel = 1; \ 347 *found_textrel = 1; \
367 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
368 return (be_wewy_wewy_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
413 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
414 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
415 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
416 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
417 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
418 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
419 rela = NULL; \ 400 rela = NULL; \
420 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
421 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
422 rel = NULL; \ 403 rel = NULL; \
423 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
424 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
425 } else \ 406 } else \
426 continue; \ 407 continue; \
427 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
428 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
443 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
444 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
445 } else \ 426 } else \
446 *found_textrels = 1; \ 427 *found_textrels = 1; \
447 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
448 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
449 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
450 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
451 continue; \ 432 continue; \
452 } \ 433 } \
453 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
454 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
457 sym = NULL; \ 438 sym = NULL; \
458 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
459 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
460 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
461 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
462 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)); \
463 else \ 444 else \
464 printf("(memory/data?)"); \ 445 printf("(memory/data?)"); \
465 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
466 /* 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 */ \
467 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
468 func = NULL; \ 449 func = NULL; \
469 offset_tmp = 0; \ 450 offset_tmp = 0; \
470 while (sym_max--) { \ 451 while (sym_max--) { \
471 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) { \
472 func = sym; \ 453 func = sym; \
486 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 467 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
487 if (be_verbose && has_objdump) { \ 468 if (be_verbose && has_objdump) { \
488 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \ 469 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
489 char *sysbuf; \ 470 char *sysbuf; \
490 size_t syslen; \ 471 size_t syslen; \
472 int sysret; \
491 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"; \
492 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \ 474 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
493 sysbuf = xmalloc(syslen); \ 475 sysbuf = xmalloc(syslen); \
494 if (end_addr < r_offset) \ 476 if (end_addr < r_offset) \
495 /* not uncommon when things are optimized out */ \ 477 /* not uncommon when things are optimized out */ \
498 (unsigned long)offset_tmp, \ 480 (unsigned long)offset_tmp, \
499 (unsigned long)end_addr, \ 481 (unsigned long)end_addr, \
500 elf->filename, \ 482 elf->filename, \
501 (unsigned long)r_offset); \ 483 (unsigned long)r_offset); \
502 fflush(stdout); \ 484 fflush(stdout); \
503 system(sysbuf); \ 485 sysret = system(sysbuf); \
504 fflush(stdout); \ 486 fflush(stdout); \
505 free(sysbuf); \ 487 free(sysbuf); \
506 } \ 488 } \
507 } \ 489 } \
508 } } 490 } }
513 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);
514 496
515 return NULL; 497 return NULL;
516} 498}
517 499
518static void rpath_security_checks(elfobj *, char *, const char *);
519static 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)
520{ 501{
521 struct stat st; 502 struct stat st;
522 switch (*item) { 503 switch (*item) {
523 case '/': break; 504 case '/': break;
539 break; 520 break;
540 } 521 }
541} 522}
542static 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)
543{ 524{
544 unsigned long i, s; 525 unsigned long i;
545 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
546 void *strtbl_void; 527 void *strtbl_void;
547 528
548 if (!show_rpath) return; 529 if (!show_rpath) return;
549 530
564 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
565 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; \
566 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
567 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
568 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
569 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
570 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
571 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
572 r = &rpath; \ 553 r = &rpath; \
573 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
574 r = &runpath; \ 555 r = &runpath; \
578 } \ 559 } \
579 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
580 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
581 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
582 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
583 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
584 /* 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 */ \
585 if (fix_elf) \ 566 if (fix_elf) \
586 offset = strlen(*r); \ 567 offset = strlen(*r); \
587 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
588 if (be_quiet) { \ 569 if (be_quiet) { \
594 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
595 while (start) { \ 576 while (start) { \
596 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
597 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
598 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
599 if (use_ldcache) \ 580 if (use_ldcache) { \
600 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
601 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
602 *r = end; \ 585 *r = end; \
603 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
604 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
605 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
606 (*r)++; \ 589 (*r)++; \
607 break; \ 590 break; \
608 } \ 591 } \
592 } \
609 if (!*r || !end) \ 593 if (!*r || !end) \
610 break; \ 594 break; \
611 else \ 595 else \
612 start = start + len + 1; \ 596 start = start + len + 1; \
613 } \ 597 } \
698#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
699#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
700#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
701#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
702 686
703static char *lookup_cache_lib(elfobj *, char *);
704
705#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
706 688
707static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
708{ 690{
709 int fd = 0; 691 int fd;
710 char *strs; 692 char *strs;
711 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
712 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
713 struct stat st; 695 struct stat st;
714 696
715 typedef struct { 697 typedef struct {
716 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
717 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
727 libentry_t *libent; 709 libentry_t *libent;
728 710
729 if (fname == NULL) 711 if (fname == NULL)
730 return NULL; 712 return NULL;
731 713
732 if (ldcache == 0) { 714 if (ldcache == NULL) {
733 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)
734 return NULL; 720 return NULL;
735 721
736 /* 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 */
737 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
738 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
739
740 close(fd); 725 close(fd);
741 726
742 if (ldcache == MAP_FAILED) { 727 if (ldcache == MAP_FAILED) {
743 ldcache = 0; 728 ldcache = NULL;
744 return NULL; 729 return NULL;
745 } 730 }
746 731
747 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;
748 return NULL; 737 return NULL;
749 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
750 return NULL;
751 } 738 }
739 } else
740 header = ldcache;
752 741
753 header = (header_t *) ldcache;
754 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
755 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
756 744
757 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
758 /* 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
759 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
760 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
761 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
762 continue; 751 continue;
763 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
764 continue; 753 continue;
765 754
766 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
767 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
768 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
769 } 761 }
762
770 return buf; 763 return buf;
771} 764}
765
772#elif defined(__NetBSD__) 766#elif defined(__NetBSD__)
773static char *lookup_cache_lib(elfobj *elf, char *fname) 767static char *lookup_cache_lib(elfobj *elf, char *fname)
774{ 768{
775 static char buf[__PAX_UTILS_PATH_MAX] = ""; 769 static char buf[__PAX_UTILS_PATH_MAX] = "";
776 static struct stat st; 770 static struct stat st;
777 771 size_t n;
778 char **ldpath; 772 char *ldpath;
779 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 773
774 array_for_each(ldpath, n, ldpath) {
780 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))
781 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 */
782 777
783 if (stat(buf, &st) != 0) 778 if (stat(buf, &st) != 0)
784 continue; /* if the lib doesn't exist in *ldpath, look further */ 779 continue; /* if the lib doesn't exist in *ldpath, look further */
785 780
809 unsigned long i; 804 unsigned long i;
810 char *needed; 805 char *needed;
811 void *strtbl_void; 806 void *strtbl_void;
812 char *p; 807 char *p;
813 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
814 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
815 815
816 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
817 817
818 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
819#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
821 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
825 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 */ \
826 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
827 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; \
828 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
829 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 */ \
830 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
831 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
832 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
833 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
834 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
835 ++dyn; \ 840 ++dyn; \
836 continue; \ 841 continue; \
837 } \ 842 } \
838 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
839 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
840 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
841 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
842 if (use_ldcache) \ 848 if (use_ldcache) \
843 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
844 needed = p; \ 850 needed = p; \
845 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
846 } \ 852 } \
847 *found_needed = 1; \ 853 *found_needed = 1; \
848 } else { \ 854 } else { \
849 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)) { \
850 *found_lib = 1; \ 864 *found_lib = 1; \
851 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
852 } \ 866 } \
853 } \ 867 } \
854 } \ 868 } \
855 ++dyn; \ 869 ++dyn; \
856 } \ 870 } \
901 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
902 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; \
903 dynamic = 1; \ 917 dynamic = 1; \
904 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
905 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
906 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
907 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
908 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
909 (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)) \
910 { \ 924 { \
911 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
924 /* 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 */
925 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))))) {
926 return NULL; 940 return NULL;
927 } else { 941 } else {
928 *found_bind = 1; 942 *found_bind = 1;
929 return (char *) (dynamic ? "LAZY" : "STATIC"); 943 return (char *)(dynamic ? "LAZY" : "STATIC");
930 } 944 }
931} 945}
932static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
933{ 947{
934 unsigned long i; 948 unsigned long i;
952 return NULL; \ 966 return NULL; \
953 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
954 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; \
955 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
956 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
957 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
958 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
959 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
960 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
961 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
962 ++dyn; \ 976 ++dyn; \
963 continue; \ 977 continue; \
964 } \ 978 } \
965 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
966 *found_soname = 1; \ 980 *found_soname = 1; \
967 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
968 } \ 982 } \
969 ++dyn; \ 983 ++dyn; \
970 } \ 984 } \
974 } 988 }
975 989
976 return NULL; 990 return NULL;
977} 991}
978 992
979static int scanelf_match_symname(const char *symname, const char *tomatch) { 993/*
980 /* We do things differently when checking with regexp */ 994 * We support the symbol form:
981 if (g_match) { 995 * [%[modifiers]%][[+-]<symbol name>][,[.....]]
982 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
983 } 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 */
984 const size_t symname_len = strlen(symname); 1129 const size_t len = strlen(this_sym);
985 return (strncmp(symname, tomatch, symname_len) == 0 && 1130 if (!(strncmp(this_sym, symname, len) == 0 &&
986 /* Accept unversioned symbol names */ 1131 /* Accept unversioned symbol names */
987 (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;
988 } 1149 }
989} 1150 } while (next_sym);
990 1151
1152 return;
1153
1154 matched:
1155 *found_sym = 1;
1156 if (next_sym)
1157 next_sym[-1] = saved;
1158}
1159
991static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
992{ 1161{
993 unsigned long i; 1162 unsigned long i;
994 char *ret; 1163 char *ret;
995 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
996 1165
997 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
998 ret = find_sym; 1167 ret = NULL;
999 1168
1000 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
1001 1170
1002 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
1003#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
1004 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
1005 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
1006 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
1007 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)); \
1008 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
1009 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
1010 if (cnt) \ 1180 if (cnt) \
1011 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
1012 for (i = 0; i < cnt; ++i) { \ 1182 for (i = 0; i < cnt; ++i) { \
1013 if ((void*)sym > (void*)elf->data_end) { \ 1183 if ((void*)sym > elf->data_end) { \
1014 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \ 1184 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1015 goto break_out; \ 1185 goto break_out; \
1016 } \ 1186 } \
1017 if (sym->st_name) { \ 1187 if (sym->st_name) { \
1018 /* make sure the symbol name is in acceptable memory range */ \ 1188 /* make sure the symbol name is in acceptable memory range */ \
1019 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
1020 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
1021 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
1022 ++sym; \ 1192 ++sym; \
1023 continue; \ 1193 continue; \
1024 } \ 1194 } \
1025 /* debug display ... show all symbols and some extra info */ \ 1195 scanelf_match_symname(elf, found_sym, \
1026 if (0 && g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \ 1196 &ret, &ret_len, symname, \
1027 printf("%s(%s) %5lX %15s %s %s\n", \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
1028 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
1029 elf->base_filename, \ 1199 EGET(sym->st_shndx), \
1030 (unsigned long)sym->st_size, \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
1031 get_elfstttype(sym->st_info), \ 1201 EGET(sym->st_size)); \
1032 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1033 *found_sym = 1; \
1034 } else { \
1035 /* allow the user to specify a comma delimited list of symbols to search for */ \
1036 char *this_sym, *next_sym; \
1037 next_sym = ret; \
1038 while (next_sym) { \
1039 this_sym = next_sym; \
1040 if ((next_sym = strchr(this_sym, ','))) \
1041 next_sym += 1; /* Skip the comma */ \
1042 /* do we want a defined symbol ? */ \
1043 if (*this_sym == '+') { \
1044 if (sym->st_shndx == SHN_UNDEF) \
1045 continue; \
1046 ++this_sym; \
1047 /* do we want an undefined symbol ? */ \
1048 } else if (*this_sym == '-') { \
1049 if (sym->st_shndx != SHN_UNDEF) \
1050 continue; \
1051 ++this_sym; \
1052 } \
1053 if (next_sym) /* Copy it so that we don't have to worry about the final , */ \
1054 this_sym = strndup(this_sym, next_sym-this_sym); \
1055 /* ok, lets compare the name now */ \
1056 if (scanelf_match_symname(this_sym, symname)) { \
1057 if (be_semi_verbose) { \
1058 char buf[126]; \
1059 snprintf(buf, sizeof(buf), "%lX %s %s", \
1060 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1061 ret = buf; \
1062 } else \
1063 ret = symname; \
1064 (*found_sym)++; \
1065 goto break_out; \
1066 } \
1067 if (next_sym) free(this_sym); \
1068 } \
1069 } \
1070 } \ 1202 } \
1071 ++sym; \ 1203 ++sym; \
1072 } } 1204 } }
1073 FIND_SYM(32) 1205 FIND_SYM(32)
1074 FIND_SYM(64) 1206 FIND_SYM(64)
1080 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
1081 return ret; 1213 return ret;
1082 if (be_quiet) 1214 if (be_quiet)
1083 return NULL; 1215 return NULL;
1084 else 1216 else
1085 return (char *)" - "; 1217 return " - ";
1086} 1218}
1087 1219
1088static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1089{ 1221{
1090 if (!find_section) 1222 if (!find_section)
1091 return NULL; 1223 return NULL;
1092 1224
1093#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
1094 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1095 int invert; \ 1228 int invert; \
1229 const char *section_name; \
1096 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1097 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
1098 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1099 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)) \
1100 *found_section = 1; \ 1241 *found_section = 1; \
1101 } 1242 }
1102 FIND_SECTION(32) 1243 FIND_SECTION(32)
1103 FIND_SECTION(64) 1244 FIND_SECTION(64)
1104 1245
1109 return find_section; 1250 return find_section;
1110 1251
1111 if (be_quiet) 1252 if (be_quiet)
1112 return NULL; 1253 return NULL;
1113 else 1254 else
1114 return (char *)" - "; 1255 return " - ";
1115} 1256}
1116 1257
1117/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1118#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1119static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1120{ 1261{
1121 unsigned long i; 1262 unsigned long i;
1122 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1123 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
1234 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1235 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;
1236 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;
1237 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;
1238 case 'D': out = get_endian(elf); break; 1379 case 'D': out = get_endian(elf); break;
1239 case 'O': out = getstr_perms(elf->filename); break; 1380 case 'O': out = strfileperms(elf->filename); break;
1240 case 'n': 1381 case 'n':
1241 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;
1242 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1243 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1244 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1248 case 'I': out = get_elfosabi(elf); break; 1389 case 'I': out = get_elfosabi(elf); break;
1249 case 'Y': out = get_elf_eabi(elf); break; 1390 case 'Y': out = get_elf_eabi(elf); break;
1250 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;;
1251 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1252 } 1393 }
1253 if (out) { 1394 if (out)
1254 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1255 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1256 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1257 else
1258 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1259 }
1260 } 1396 }
1261 1397
1262#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1263 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1264 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1296 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1297 goto label_done; 1433 goto label_done;
1298 break; 1434 break;
1299 default: break; 1435 default: break;
1300 } 1436 }
1301 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1302 char sbuf[126]; 1438 char sbuf[126];
1303 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1304 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1305 char *p; 1441 char *p;
1306 while ((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1332 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1333 if (ar == NULL) 1469 if (ar == NULL)
1334 return 1; 1470 return 1;
1335 1471
1336 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);
1337 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");
1338 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);
1339 if (elf) { 1478 if (elf) {
1340 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1341 unreadelf(elf); 1480 unreadelf(elf);
1342 } 1481 }
1343 } 1482 }
1377 1516
1378 close(fd); 1517 close(fd);
1379 return 0; 1518 return 0;
1380} 1519}
1381 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
1382/* 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 */
1383static int scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1384{ 1533{
1385 register DIR *dir; 1534 register DIR *dir;
1386 register struct dirent *dentry; 1535 register struct dirent *dentry;
1387 struct stat st_top, st; 1536 struct stat st_top, st;
1388 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1389 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1390 int ret = 0; 1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1391 1543
1392 /* make sure path exists */ 1544 /* make sure path exists */
1393 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1394 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1395 return 1; 1547 return 1;
1459static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1460{ 1612{
1461 FILE *fp = NULL; 1613 FILE *fp = NULL;
1462 char *p; 1614 char *p;
1463 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1464 1617
1465 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1466 return i;
1467 1619
1468 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1469 return i; 1621 return i;
1470 1622
1471 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1472 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1473 *p = 0; 1625 *p = 0;
1474 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1475 *p = 0; 1627 *p = 0;
1476#ifdef __linux__ 1628
1477 /* recursive includes of the same file will make this segfault. */ 1629 /* recursive includes of the same file will make this segfault. */
1478 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1479 glob64_t gl; 1631 glob_t gl;
1480 size_t x; 1632 size_t x;
1481 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1482 1634
1483 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1484 1638
1485 if (path[8] != '/') 1639 if (path[8] != '/')
1486 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1487 else 1641 else
1488 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1489 1643
1490 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1491 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1492 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1493 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1494 continue; 1648 continue;
1495 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1496 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1497 globfree64(&gl);
1498 return i;
1499 }
1500 } 1650 }
1501 globfree64 (&gl); 1651 globfree(&gl);
1502 continue; 1652 continue;
1503 } 1653 }
1504 } 1654 }
1505#endif 1655
1506 if (*path != '/') 1656 if (*path != '/')
1507 continue; 1657 continue;
1508 1658
1509 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1510
1511 if (i + 1 == ARRAY_SIZE(ldpaths))
1512 break;
1513 } 1660 }
1514 ldpaths[i] = NULL;
1515 1661
1516 fclose(fp); 1662 fclose(fp);
1517 return i; 1663 return i;
1518} 1664}
1519 1665
1520#elif defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1521 1667
1522static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1523{ 1669{
1524 FILE *fp = NULL; 1670 FILE *fp = NULL;
1525 char *b = NULL, *p; 1671 char *b = NULL, *p;
1526 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1527 1674
1528 if (i + 1 == ARRAY_SIZE(ldpaths)) 1675 fname = maybe_add_root(fname, _fname);
1529 return i;
1530 1676
1531 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1532 return i; 1678 return i;
1533 1679
1534 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1545 free(b); 1691 free(b);
1546 return i; 1692 return i;
1547 } 1693 }
1548 1694
1549 while ((p = strsep(&b, ":"))) { 1695 while ((p = strsep(&b, ":"))) {
1550 if (*p == '\0') continue; 1696 if (*p == '\0')
1551 ldpaths[i++] = xstrdup(p); 1697 continue;
1552 1698 xarraypush(ldpaths, p, strlen(p));
1553 if (i + 1 == ARRAY_SIZE(ldpaths))
1554 break;
1555 } 1699 }
1556 ldpaths[i] = NULL;
1557 1700
1558 free(b); 1701 free(b);
1559 fclose(fp); 1702 fclose(fp);
1560 return i; 1703 return i;
1561} 1704}
1564#ifdef __ELF__ 1707#ifdef __ELF__
1565#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1566#endif 1709#endif
1567static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1568{ 1711{
1569 memset(ldpaths, 0x00, sizeof(ldpaths));
1570 return 0; 1712 return 0;
1571} 1713}
1572#endif 1714#endif
1573 1715
1574/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1575static void scanelf_ldpath(void) 1717static void scanelf_ldpath(void)
1576{ 1718{
1577 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1578 int i = 0; 1722 int i = 0;
1579 1723
1580 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1581 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1582 1726
1583 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1584 1728
1585 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1586 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1587 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1588 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1589 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1590 ++i; 1734 ++i;
1591 } 1735 }
1592 1736
1593 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1594 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1611 } 1755 }
1612 1756
1613 free(path); 1757 free(path);
1614} 1758}
1615 1759
1616/* 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 */
1617#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"
1618#define a_argument required_argument 1762#define a_argument required_argument
1619static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1620 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1621 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1622 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1623 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1624 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1625 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1626 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1650 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1651 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1652 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1653 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1654 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1655 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1656 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1657 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1658 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1659}; 1805};
1660 1806
1661static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1662 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1663 "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)",
1664 "Scan directories recursively", 1811 "Scan directories recursively",
1665 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1666 "Don't scan symlinks", 1813 "Don't scan symlinks",
1667 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1668 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1677 "Print BIND information", 1824 "Print BIND information",
1678 "Print SONAME information", 1825 "Print SONAME information",
1679 "Find a specified symbol", 1826 "Find a specified symbol",
1680 "Find a specified section", 1827 "Find a specified section",
1681 "Find a specified library", 1828 "Find a specified library",
1682 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1683 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1684 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1685 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1686 "Print Endianness", 1833 "Print Endianness",
1687 "Print OSABI", 1834 "Print OSABI",
1688 "Print EABI (EM_ARM Only)", 1835 "Print EABI (EM_ARM Only)",
1689 "Print only ELF files matching octal permissions", 1836 "Print only ELF files matching octal permissions",
1690 "Print ELF file size", 1837 "Print ELF file size",
1691 "Print all scanned info (-x -e -t -r -b)\n", 1838 "Print all useful/simple info\n",
1692 "Only output 'bad' things", 1839 "Only output 'bad' things",
1693 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1694 "Use specified format for output", 1841 "Use specified format for output",
1695 "Read input stream from a filename", 1842 "Read input stream from a filename",
1696 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1697 "Don't display the header", 1845 "Don't display the header",
1698 "Print this help and exit", 1846 "Print this help and exit",
1699 "Print version and exit", 1847 "Print version and exit",
1700 NULL 1848 NULL
1701}; 1849};
1708 "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);
1709 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1710 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1711 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1712 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",
1713 long_opts[i].name, opts_help[i]); 1864 long_opts[i].name, opts_help[i]);
1714 else 1865 else
1715 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1716 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1717 1868
1748 case 'f': 1899 case 'f':
1749 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");
1750 from_file = optarg; 1901 from_file = optarg;
1751 break; 1902 break;
1752 case 'E': 1903 case 'E':
1753 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1754 break; 1905 break;
1755 case 'M': 1906 case 'M':
1756 match_bits = atoi(optarg); 1907 match_bits = atoi(optarg);
1757 if (match_bits == 0) { 1908 if (match_bits == 0) {
1758 if (strcmp(optarg, "ELFCLASS32") == 0) 1909 if (strcmp(optarg, "ELFCLASS32") == 0)
1769 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1770 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1771 break; 1922 break;
1772 } 1923 }
1773 case 'k': 1924 case 'k':
1774 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1775 find_section = optarg;
1776 break; 1926 break;
1777 case 's': { 1927 case 's': {
1778 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");
1779 find_sym = optarg; 1929 find_sym = optarg;
1780 break; 1930 break;
1781 } 1931 }
1782 case 'N': { 1932 case 'N':
1783 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1784 find_lib = optarg;
1785 break; 1934 break;
1786 }
1787
1788 case 'F': { 1935 case 'F': {
1789 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");
1790 out_format = optarg; 1937 out_format = optarg;
1791 break; 1938 break;
1792 } 1939 }
1836 case 'Z': show_size = 1; break; 1983 case 'Z': show_size = 1; break;
1837 case 'g': g_match = 1; break; 1984 case 'g': g_match = 1; break;
1838 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1839 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1840 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1841 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1842 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1843 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1844 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1845 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1857 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1858 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;
1859 case 'D': show_endian = 1; break; 2007 case 'D': show_endian = 1; break;
1860 case 'I': show_osabi = 1; break; 2008 case 'I': show_osabi = 1; break;
1861 case 'Y': show_eabi = 1; break; 2009 case 'Y': show_eabi = 1; break;
2010 case 128:
2011 root = optarg;
2012 break;
1862 case ':': 2013 case ':':
1863 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1864 case '?': 2015 case '?':
1865 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1866 default: 2017 default:
1869 } 2020 }
1870 if (show_textrels && be_verbose) { 2021 if (show_textrels && be_verbose) {
1871 if (which("objdump") != NULL) 2022 if (which("objdump") != NULL)
1872 has_objdump = 1; 2023 has_objdump = 1;
1873 } 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);
1874 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1875 if (out_format) { 2031 if (out_format) {
1876 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1877 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1878 show_textrels = show_perms = show_endian = show_size = \ 2034 show_textrels = show_perms = show_endian = show_size = \
1957 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1958 ret = scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1959 } 2115 }
1960 2116
1961 /* clean up */ 2117 /* clean up */
1962 for (i = 0; ldpaths[i]; ++i)
1963 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1964 2123
1965 if (ldcache != 0) 2124 if (ldcache != 0)
1966 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1967 return ret; 2126 return ret;
1968} 2127}
2001 return envvals; 2160 return envvals;
2002} 2161}
2003 2162
2004static void parseenv(void) 2163static void parseenv(void)
2005{ 2164{
2165 color_init(false);
2006 qa_textrels = get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
2007 qa_execstack = get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
2008 qa_wx_load = get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
2009} 2169}
2010 2170

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