/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.188 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 1.188 2007/08/31 17:45:24 solar 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 1.188 2007/08/31 17:45:24 solar 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;
40static char dir_crossmount = 1; 28static char dir_crossmount = 1;
41static char show_pax = 0; 29static char show_pax = 0;
42static char show_perms = 0; 30static char show_perms = 0;
31static char show_size = 0;
43static char show_phdr = 0; 32static char show_phdr = 0;
44static char show_textrel = 0; 33static char show_textrel = 0;
45static char show_rpath = 0; 34static char show_rpath = 0;
46static char show_needed = 0; 35static char show_needed = 0;
47static char show_interp = 0; 36static char show_interp = 0;
48static char show_bind = 0; 37static char show_bind = 0;
49static char show_soname = 0; 38static char show_soname = 0;
50static char show_textrels = 0; 39static char show_textrels = 0;
51static char show_banner = 1; 40static char show_banner = 1;
52static char show_endian = 0; 41static char show_endian = 0;
42static char show_osabi = 0;
43static char show_eabi = 0;
53static char be_quiet = 0; 44static char be_quiet = 0;
54static char be_verbose = 0; 45static char be_verbose = 0;
55static char be_wewy_wewy_quiet = 0; 46static char be_wewy_wewy_quiet = 0;
56static char be_semi_verbose = 0; 47static char be_semi_verbose = 0;
57static char *find_sym = NULL, *versioned_symname = NULL; 48static char *find_sym = NULL;
58static char *find_lib = NULL; 49static char *find_lib = NULL;
50static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
59static char *find_section = NULL; 51static char *find_section = NULL;
52static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
60static char *out_format = NULL; 53static char *out_format = NULL;
61static char *search_path = NULL; 54static char *search_path = NULL;
62static char fix_elf = 0; 55static char fix_elf = 0;
63static char g_match = 0; 56static char g_match = 0;
64static char use_ldcache = 0; 57static char use_ldcache = 0;
65 58
66static char **qa_textrels = NULL; 59static char **qa_textrels = NULL;
67static char **qa_execstack = NULL; 60static char **qa_execstack = NULL;
68static char **qa_wx_load = NULL; 61static char **qa_wx_load = NULL;
62static char *root;
69 63
70int match_bits = 0; 64static int match_bits = 0;
71unsigned int match_perms = 0; 65static unsigned int match_perms = 0;
72caddr_t ldcache = 0; 66static void *ldcache = NULL;
73size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
74unsigned long setpax = 0UL; 68static unsigned long setpax = 0UL;
75 69
76int has_objdump = 0; 70static int has_objdump = 0;
77
78static char *getstr_perms(const char *fname);
79static char *getstr_perms(const char *fname)
80{
81 struct stat st;
82 static char buf[8];
83
84 if ((stat(fname, &st)) == (-1))
85 return (char *) "";
86
87 snprintf(buf, sizeof(buf), "%o", st.st_mode);
88
89 return (char *) buf + 2;
90}
91 71
92/* find the path to a file by name */ 72/* find the path to a file by name */
93static char *which(const char *fname) 73static char *which(const char *fname)
94{ 74{
95 static char fullpath[BUFSIZ]; 75 static char fullpath[__PAX_UTILS_PATH_MAX];
96 char *path, *p; 76 char *path, *p;
97 77
98 path = getenv("PATH"); 78 path = getenv("PATH");
99 if (!path) 79 if (!path)
100 return NULL; 80 return NULL;
101 81
102 path = xstrdup(path); 82 path = xstrdup(path);
103 while ((p = strrchr(path, ':')) != NULL) { 83 while ((p = strrchr(path, ':')) != NULL) {
104 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname); 84 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
105 *p = 0; 85 *p = 0;
106 if (access(fullpath, R_OK) != (-1)) { 86 if (access(fullpath, R_OK) != -1) {
107 free(path); 87 free(path);
108 return (char *) fullpath; 88 return fullpath;
109 } 89 }
110 } 90 }
111 free(path); 91 free(path);
112 return NULL; 92 return NULL;
113} 93}
118 regex_t preg; 98 regex_t preg;
119 int ret; 99 int ret;
120 100
121 if ((match == NULL) || (regex == NULL)) 101 if ((match == NULL) || (regex == NULL))
122 return EXIT_FAILURE; 102 return EXIT_FAILURE;
123
124 103
125 if ((ret = regcomp(&preg, regex, cflags))) { 104 if ((ret = regcomp(&preg, regex, cflags))) {
126 char err[256]; 105 char err[256];
127 106
128 if (regerror(ret, &preg, err, sizeof(err))) 107 if (regerror(ret, &preg, err, sizeof(err)))
140 119
141/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
142static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
143{ 122{
144 /* 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
145#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
146 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
147 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
148 /* debug sections */ \
149 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
150 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
151 /* runtime sections */ \
152 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
153 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
154 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
155 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
156 } else { \ 138 } else \
157 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
158 } \
159 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
160 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
161 } else { \ 144 } else \
162 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
163 } \
164 } 146 }
165 GET_SYMTABS(32) 147 GET_SYMTABS(32)
166 GET_SYMTABS(64) 148 GET_SYMTABS(64)
167} 149}
168 150
197 } \ 179 } \
198 } 180 }
199 SHOW_PAX(32) 181 SHOW_PAX(32)
200 SHOW_PAX(64) 182 SHOW_PAX(64)
201 } 183 }
202
203 184
204 if (fix_elf && setpax) { 185 if (fix_elf && setpax) {
205 /* set the chpax settings */ 186 /* set the chpax settings */
206 if (elf->elf_class == ELFCLASS32) { 187 if (elf->elf_class == ELFCLASS32) {
207 if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC) 188 if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC)
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 == (caddr_t)-1) { 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
793 788
794 /* not found in any path */ 789 /* not found in any path */
795 return NULL; 790 return NULL;
796} 791}
797#else 792#else
793#ifdef __ELF__
798#warning Cache support not implemented for your target 794#warning Cache support not implemented for your target
795#endif
799static char *lookup_cache_lib(elfobj *elf, char *fname) 796static char *lookup_cache_lib(elfobj *elf, char *fname)
800{ 797{
801 return NULL; 798 return NULL;
802} 799}
803#endif 800#endif
807 unsigned long i; 804 unsigned long i;
808 char *needed; 805 char *needed;
809 void *strtbl_void; 806 void *strtbl_void;
810 char *p; 807 char *p;
811 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
812 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
813 815
814 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
815 817
816 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
817#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
819 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
820 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
821 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
822 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
823 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 */ \
824 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
825 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; \
826 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
827 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 */ \
828 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
829 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
830 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
831 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
832 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
833 ++dyn; \ 840 ++dyn; \
834 continue; \ 841 continue; \
835 } \ 842 } \
836 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
837 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
838 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
839 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
840 if (use_ldcache) \ 848 if (use_ldcache) \
841 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
842 needed = p; \ 850 needed = p; \
843 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
844 } \ 852 } \
845 *found_needed = 1; \ 853 *found_needed = 1; \
846 } else { \ 854 } else { \
847 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)) { \
848 *found_lib = 1; \ 864 *found_lib = 1; \
849 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
850 } \ 866 } \
851 } \ 867 } \
852 } \ 868 } \
853 ++dyn; \ 869 ++dyn; \
854 } \ 870 } \
899 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
900 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; \
901 dynamic = 1; \ 917 dynamic = 1; \
902 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
903 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
904 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
905 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
906 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
907 (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)) \
908 { \ 924 { \
909 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
922 /* 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 */
923 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))))) {
924 return NULL; 940 return NULL;
925 } else { 941 } else {
926 *found_bind = 1; 942 *found_bind = 1;
927 return (char *) (dynamic ? "LAZY" : "STATIC"); 943 return (char *)(dynamic ? "LAZY" : "STATIC");
928 } 944 }
929} 945}
930static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
931{ 947{
932 unsigned long i; 948 unsigned long i;
950 return NULL; \ 966 return NULL; \
951 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
952 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; \
953 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
954 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
955 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
956 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
957 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
958 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
959 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
960 ++dyn; \ 976 ++dyn; \
961 continue; \ 977 continue; \
962 } \ 978 } \
963 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
964 *found_soname = 1; \ 980 *found_soname = 1; \
965 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
966 } \ 982 } \
967 ++dyn; \ 983 ++dyn; \
968 } \ 984 } \
972 } 988 }
973 989
974 return NULL; 990 return NULL;
975} 991}
976 992
993/*
994 * We support the symbol form:
995 * [%[modifiers]%][[+-]<symbol name>][,[.....]]
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
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 */
1129 const size_t len = strlen(this_sym);
1130 if (!(strncmp(this_sym, symname, len) == 0 &&
1131 /* Accept unversioned symbol names */
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;
1149 }
1150 } while (next_sym);
1151
1152 return;
1153
1154 matched:
1155 *found_sym = 1;
1156 if (next_sym)
1157 next_sym[-1] = saved;
1158}
1159
977static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
978{ 1161{
979 unsigned long i; 1162 unsigned long i;
980 char *ret; 1163 char *ret;
981 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
982 1165
983 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
984 ret = find_sym; 1167 ret = NULL;
985 1168
986 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
987 1170
988 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
989#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
990 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
991 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
992 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
993 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)); \
994 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
995 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
996 if (cnt) \ 1180 if (cnt) \
997 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
998 for (i = 0; i < cnt; ++i) { \ 1182 for (i = 0; i < cnt; ++i) { \
1183 if ((void*)sym > elf->data_end) { \
1184 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1185 goto break_out; \
1186 } \
999 if (sym->st_name) { \ 1187 if (sym->st_name) { \
1000 /* make sure the symbol name is in acceptable memory range */ \ 1188 /* make sure the symbol name is in acceptable memory range */ \
1001 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
1002 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
1003 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
1004 ++sym; \ 1192 ++sym; \
1005 continue; \ 1193 continue; \
1006 } \ 1194 } \
1007 /* debug display ... show all symbols and some extra info */ \ 1195 scanelf_match_symname(elf, found_sym, \
1008 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \ 1196 &ret, &ret_len, symname, \
1009 printf("%s(%s) %5lX %15s %s %s\n", \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
1010 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
1011 elf->base_filename, \ 1199 EGET(sym->st_shndx), \
1012 (unsigned long)sym->st_size, \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
1013 get_elfstttype(sym->st_info), \ 1201 EGET(sym->st_size)); \
1014 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1015 *found_sym = 1; \
1016 } else { \
1017 /* allow the user to specify a comma delimited list of symbols to search for */ \
1018 char *this_sym, *this_sym_ver, *next_sym; \
1019 this_sym = ret; \
1020 this_sym_ver = versioned_symname; \
1021 do { \
1022 next_sym = strchr(this_sym, ','); \
1023 if (next_sym == NULL) \
1024 next_sym = this_sym + strlen(this_sym); \
1025 /* do we want a defined symbol ? */ \
1026 if (*this_sym == '+') { \
1027 if (sym->st_shndx == SHN_UNDEF) \
1028 goto skip_this_sym##B; \
1029 ++this_sym; \
1030 ++this_sym_ver; \
1031 /* do we want an undefined symbol ? */ \
1032 } else if (*this_sym == '-') { \
1033 if (sym->st_shndx != SHN_UNDEF) \
1034 goto skip_this_sym##B; \
1035 ++this_sym; \
1036 ++this_sym_ver; \
1037 } \
1038 /* ok, lets compare the name now */ \
1039 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
1040 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
1041 if (be_semi_verbose) { \
1042 char buf[126]; \
1043 snprintf(buf, sizeof(buf), "%lX %s %s", \
1044 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1045 ret = buf; \
1046 } else \
1047 ret = this_sym; \
1048 (*found_sym)++; \
1049 goto break_out; \
1050 } \
1051 skip_this_sym##B: this_sym = next_sym + 1; \
1052 } while (*next_sym != '\0'); \
1053 } \
1054 } \ 1202 } \
1055 ++sym; \ 1203 ++sym; \
1056 } } 1204 } }
1057 FIND_SYM(32) 1205 FIND_SYM(32)
1058 FIND_SYM(64) 1206 FIND_SYM(64)
1064 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
1065 return ret; 1213 return ret;
1066 if (be_quiet) 1214 if (be_quiet)
1067 return NULL; 1215 return NULL;
1068 else 1216 else
1069 return (char *)" - "; 1217 return " - ";
1070} 1218}
1071 1219
1072
1073static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1074{ 1221{
1075 if (!find_section) 1222 if (!find_section)
1076 return NULL; 1223 return NULL;
1077 1224
1078#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
1079 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1080 int invert; \ 1228 int invert; \
1229 const char *section_name; \
1081 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1082 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
1083 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1084 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)) \
1085 *found_section = 1; \ 1241 *found_section = 1; \
1086 } 1242 }
1087 FIND_SECTION(32) 1243 FIND_SECTION(32)
1088 FIND_SECTION(64) 1244 FIND_SECTION(64)
1089 1245
1094 return find_section; 1250 return find_section;
1095 1251
1096 if (be_quiet) 1252 if (be_quiet)
1097 return NULL; 1253 return NULL;
1098 else 1254 else
1099 return (char *)" - "; 1255 return " - ";
1100} 1256}
1101 1257
1102/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1103#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1104static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1105{ 1261{
1106 unsigned long i; 1262 unsigned long i;
1107 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1108 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
1147 case 'r': prints("RPATH "); break; 1303 case 'r': prints("RPATH "); break;
1148 case 'M': prints("CLASS "); break; 1304 case 'M': prints("CLASS "); break;
1149 case 'n': prints("NEEDED "); break; 1305 case 'n': prints("NEEDED "); break;
1150 case 'i': prints("INTERP "); break; 1306 case 'i': prints("INTERP "); break;
1151 case 'b': prints("BIND "); break; 1307 case 'b': prints("BIND "); break;
1308 case 'Z': prints("SIZE "); break;
1152 case 'S': prints("SONAME "); break; 1309 case 'S': prints("SONAME "); break;
1153 case 's': prints("SYM "); break; 1310 case 's': prints("SYM "); break;
1154 case 'N': prints("LIB "); break; 1311 case 'N': prints("LIB "); break;
1155 case 'T': prints("TEXTRELS "); break; 1312 case 'T': prints("TEXTRELS "); break;
1156 case 'k': prints("SECTION "); break; 1313 case 'k': prints("SECTION "); break;
1157 case 'a': prints("ARCH "); break; 1314 case 'a': prints("ARCH "); break;
1315 case 'I': prints("OSABI "); break;
1316 case 'Y': prints("EABI "); break;
1158 case 'O': prints("PERM "); break; 1317 case 'O': prints("PERM "); break;
1159 case 'D': prints("ENDIAN "); break; 1318 case 'D': prints("ENDIAN "); break;
1160 default: warnf("'%c' has no title ?", out_format[i]); 1319 default: warnf("'%c' has no title ?", out_format[i]);
1161 } 1320 }
1162 } 1321 }
1168 1327
1169 /* dump all the good stuff */ 1328 /* dump all the good stuff */
1170 for (i = 0; out_format[i]; ++i) { 1329 for (i = 0; out_format[i]; ++i) {
1171 const char *out; 1330 const char *out;
1172 const char *tmp; 1331 const char *tmp;
1173 1332 static char ubuf[sizeof(unsigned long)*2];
1174 if (!IS_MODIFIER(out_format[i])) { 1333 if (!IS_MODIFIER(out_format[i])) {
1175 xchrcat(&out_buffer, out_format[i], &out_len); 1334 xchrcat(&out_buffer, out_format[i], &out_len);
1176 continue; 1335 continue;
1177 } 1336 }
1178 1337
1216 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1217 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;
1218 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;
1219 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;
1220 case 'D': out = get_endian(elf); break; 1379 case 'D': out = get_endian(elf); break;
1221 case 'O': out = getstr_perms(elf->filename); break; 1380 case 'O': out = strfileperms(elf->filename); break;
1222 case 'n': 1381 case 'n':
1223 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;
1224 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1225 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1226 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1227 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1386 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1228 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1387 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1229 case 'a': out = get_elfemtype(elf); break; 1388 case 'a': out = get_elfemtype(elf); break;
1389 case 'I': out = get_elfosabi(elf); break;
1390 case 'Y': out = get_elf_eabi(elf); break;
1391 case 'Z': snprintf(ubuf, sizeof(ubuf), "%lu", (unsigned long)elf->len); out = ubuf; break;;
1230 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1231 } 1393 }
1232 if (out) { 1394 if (out)
1233 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1234 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1235 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1236 else
1237 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1238 }
1239 } 1396 }
1240 1397
1241#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1242 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1243 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1275 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1276 goto label_done; 1433 goto label_done;
1277 break; 1434 break;
1278 default: break; 1435 default: break;
1279 } 1436 }
1280 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1281 char sbuf[126]; 1438 char sbuf[126];
1282 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1283 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1284 char *p; 1441 char *p;
1285 while ((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1310 1467
1311 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1312 if (ar == NULL) 1469 if (ar == NULL)
1313 return 1; 1470 return 1;
1314 1471
1315 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0); 1472 ar_buffer = mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1316 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");
1317 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);
1318 if (elf) { 1478 if (elf) {
1319 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1320 unreadelf(elf); 1480 unreadelf(elf);
1321 } 1481 }
1322 } 1482 }
1356 1516
1357 close(fd); 1517 close(fd);
1358 return 0; 1518 return 0;
1359} 1519}
1360 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
1361/* 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 */
1362static int scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1363{ 1533{
1364 register DIR *dir; 1534 register DIR *dir;
1365 register struct dirent *dentry; 1535 register struct dirent *dentry;
1366 struct stat st_top, st; 1536 struct stat st_top, st;
1367 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1368 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1369 int ret = 0; 1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1370 1543
1371 /* make sure path exists */ 1544 /* make sure path exists */
1372 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1373 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1374 return 1; 1547 return 1;
1438static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1439{ 1612{
1440 FILE *fp = NULL; 1613 FILE *fp = NULL;
1441 char *p; 1614 char *p;
1442 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1443 1617
1444 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1445 return i;
1446 1619
1447 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1448 return i; 1621 return i;
1449 1622
1450 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1451 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1452 *p = 0; 1625 *p = 0;
1453 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1454 *p = 0; 1627 *p = 0;
1455#ifdef __linux__ 1628
1456 /* recursive includes of the same file will make this segfault. */ 1629 /* recursive includes of the same file will make this segfault. */
1457 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1458 glob64_t gl; 1631 glob_t gl;
1459 size_t x; 1632 size_t x;
1460 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1461 1634
1462 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1463 1638
1464 if (path[8] != '/') 1639 if (path[8] != '/')
1465 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1466 else 1641 else
1467 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1468 1643
1469 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1470 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1471 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1472 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1473 continue; 1648 continue;
1474 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1475 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1476 globfree64(&gl);
1477 return i;
1478 }
1479 } 1650 }
1480 globfree64 (&gl); 1651 globfree(&gl);
1481 continue; 1652 continue;
1482 } 1653 }
1483 } 1654 }
1484#endif 1655
1485 if (*path != '/') 1656 if (*path != '/')
1486 continue; 1657 continue;
1487 1658
1488 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1489
1490 if (i + 1 == ARRAY_SIZE(ldpaths))
1491 break;
1492 } 1660 }
1493 ldpaths[i] = NULL;
1494 1661
1495 fclose(fp); 1662 fclose(fp);
1496 return i; 1663 return i;
1497} 1664}
1498 1665
1499#elif defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1500 1667
1501static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1502{ 1669{
1503 FILE *fp = NULL; 1670 FILE *fp = NULL;
1504 char *b = NULL, *p; 1671 char *b = NULL, *p;
1505 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1506 1674
1507 if (i + 1 == ARRAY_SIZE(ldpaths)) 1675 fname = maybe_add_root(fname, _fname);
1508 return i;
1509 1676
1510 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1511 return i; 1678 return i;
1512 1679
1513 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1524 free(b); 1691 free(b);
1525 return i; 1692 return i;
1526 } 1693 }
1527 1694
1528 while ((p = strsep(&b, ":"))) { 1695 while ((p = strsep(&b, ":"))) {
1529 if (*p == '\0') continue; 1696 if (*p == '\0')
1530 ldpaths[i++] = xstrdup(p); 1697 continue;
1531 1698 xarraypush(ldpaths, p, strlen(p));
1532 if (i + 1 == ARRAY_SIZE(ldpaths))
1533 break;
1534 } 1699 }
1535 ldpaths[i] = NULL;
1536 1700
1537 free(b); 1701 free(b);
1538 fclose(fp); 1702 fclose(fp);
1539 return i; 1703 return i;
1540} 1704}
1541 1705
1542#else 1706#else
1543 1707#ifdef __ELF__
1544#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1709#endif
1545static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1546{ 1711{
1547 memset(ldpaths, 0x00, sizeof(ldpaths)); 1712 return 0;
1548} 1713}
1549
1550#endif 1714#endif
1551 1715
1552/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1553static void scanelf_ldpath(void) 1717static void scanelf_ldpath(void)
1554{ 1718{
1555 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1556 int i = 0; 1722 int i = 0;
1557 1723
1558 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1559 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1560 1726
1561 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1562 1728
1563 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1564 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1565 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1566 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1567 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1568 ++i; 1734 ++i;
1569 } 1735 }
1570 1736
1571 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1572 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1589 } 1755 }
1590 1756
1591 free(path); 1757 free(path);
1592} 1758}
1593 1759
1594
1595/* usage / invocation handling functions */ /* Free Flags: c d j u w C G H I J K P Q U W Y Z */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1596#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DO:BhV" 1761#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZCBhV"
1597#define a_argument required_argument 1762#define a_argument required_argument
1598static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1599 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1600 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1601 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1602 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1603 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1604 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1605 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1619 {"gmatch", no_argument, NULL, 'g'}, 1785 {"gmatch", no_argument, NULL, 'g'},
1620 {"textrels", no_argument, NULL, 'T'}, 1786 {"textrels", no_argument, NULL, 'T'},
1621 {"etype", a_argument, NULL, 'E'}, 1787 {"etype", a_argument, NULL, 'E'},
1622 {"bits", a_argument, NULL, 'M'}, 1788 {"bits", a_argument, NULL, 'M'},
1623 {"endian", no_argument, NULL, 'D'}, 1789 {"endian", no_argument, NULL, 'D'},
1790 {"osabi", no_argument, NULL, 'I'},
1791 {"eabi", no_argument, NULL, 'Y'},
1624 {"perms", a_argument, NULL, 'O'}, 1792 {"perms", a_argument, NULL, 'O'},
1793 {"size", no_argument, NULL, 'Z'},
1625 {"all", no_argument, NULL, 'a'}, 1794 {"all", no_argument, NULL, 'a'},
1626 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1627 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1628 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1629 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1630 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1631 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1632 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1633 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1634 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1635}; 1805};
1636 1806
1637static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1638 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1639 "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)",
1640 "Scan directories recursively", 1811 "Scan directories recursively",
1641 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1642 "Don't scan symlinks", 1813 "Don't scan symlinks",
1643 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1644 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1653 "Print BIND information", 1824 "Print BIND information",
1654 "Print SONAME information", 1825 "Print SONAME information",
1655 "Find a specified symbol", 1826 "Find a specified symbol",
1656 "Find a specified section", 1827 "Find a specified section",
1657 "Find a specified library", 1828 "Find a specified library",
1658 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1659 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1660 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1661 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1662 "Print Endianness", 1833 "Print Endianness",
1834 "Print OSABI",
1835 "Print EABI (EM_ARM Only)",
1663 "Print only ELF files matching octal permissions", 1836 "Print only ELF files matching octal permissions",
1664 "Print all scanned info (-x -e -t -r -b)\n", 1837 "Print ELF file size",
1838 "Print all useful/simple info\n",
1665 "Only output 'bad' things", 1839 "Only output 'bad' things",
1666 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1667 "Use specified format for output", 1841 "Use specified format for output",
1668 "Read input stream from a filename", 1842 "Read input stream from a filename",
1669 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1670 "Don't display the header", 1845 "Don't display the header",
1671 "Print this help and exit", 1846 "Print this help and exit",
1672 "Print version and exit", 1847 "Print version and exit",
1673 NULL 1848 NULL
1674}; 1849};
1681 "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);
1682 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1683 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1684 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1685 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",
1686 long_opts[i].name, opts_help[i]); 1864 long_opts[i].name, opts_help[i]);
1687 else 1865 else
1688 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1689 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1690 1868
1721 case 'f': 1899 case 'f':
1722 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");
1723 from_file = optarg; 1901 from_file = optarg;
1724 break; 1902 break;
1725 case 'E': 1903 case 'E':
1726 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1727 break; 1905 break;
1728 case 'M': 1906 case 'M':
1729 match_bits = atoi(optarg); 1907 match_bits = atoi(optarg);
1730 if (match_bits == 0) { 1908 if (match_bits == 0) {
1731 if (strcmp(optarg, "ELFCLASS32") == 0) 1909 if (strcmp(optarg, "ELFCLASS32") == 0)
1733 if (strcmp(optarg, "ELFCLASS64") == 0) 1911 if (strcmp(optarg, "ELFCLASS64") == 0)
1734 match_bits = 64; 1912 match_bits = 64;
1735 } 1913 }
1736 break; 1914 break;
1737 case 'O': 1915 case 'O':
1738 if (sscanf(optarg, "%o", &match_perms) == (-1)) 1916 if (sscanf(optarg, "%o", &match_perms) == -1)
1739 match_bits = 0; 1917 match_bits = 0;
1740 break; 1918 break;
1741 case 'o': { 1919 case 'o': {
1742 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1743 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1744 break; 1922 break;
1745 } 1923 }
1746 case 'k': 1924 case 'k':
1747 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1748 find_section = optarg;
1749 break; 1926 break;
1750 case 's': { 1927 case 's': {
1751 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");
1752 find_sym = optarg; 1929 find_sym = optarg;
1753 versioned_symname = xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1754 sprintf(versioned_symname, "%s@", find_sym);
1755 break; 1930 break;
1756 } 1931 }
1757 case 'N': { 1932 case 'N':
1758 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1759 find_lib = optarg;
1760 break; 1934 break;
1761 }
1762
1763 case 'F': { 1935 case 'F': {
1764 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");
1765 out_format = optarg; 1937 out_format = optarg;
1766 break; 1938 break;
1767 } 1939 }
1806 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1978 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1807 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1979 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1808 setpax = flags; 1980 setpax = flags;
1809 break; 1981 break;
1810 } 1982 }
1983 case 'Z': show_size = 1; break;
1811 case 'g': g_match = 1; break; 1984 case 'g': g_match = 1; break;
1812 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1813 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1814 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1815 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1816 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1817 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1818 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1819 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1829 case 'T': show_textrels = 1; break; 2003 case 'T': show_textrels = 1; break;
1830 case 'q': be_quiet = 1; break; 2004 case 'q': be_quiet = 1; break;
1831 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1832 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;
1833 case 'D': show_endian = 1; break; 2007 case 'D': show_endian = 1; break;
2008 case 'I': show_osabi = 1; break;
2009 case 'Y': show_eabi = 1; break;
2010 case 128:
2011 root = optarg;
2012 break;
1834 case ':': 2013 case ':':
1835 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1836 case '?': 2015 case '?':
1837 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1838 default: 2017 default:
1841 } 2020 }
1842 if (show_textrels && be_verbose) { 2021 if (show_textrels && be_verbose) {
1843 if (which("objdump") != NULL) 2022 if (which("objdump") != NULL)
1844 has_objdump = 1; 2023 has_objdump = 1;
1845 } 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);
1846 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1847 if (out_format) { 2031 if (out_format) {
1848 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1849 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1850 show_textrels = show_perms = show_endian = 0; 2034 show_textrels = show_perms = show_endian = show_size = \
2035 show_osabi = show_eabi = 0;
1851 for (i = 0; out_format[i]; ++i) { 2036 for (i = 0; out_format[i]; ++i) {
1852 if (!IS_MODIFIER(out_format[i])) continue; 2037 if (!IS_MODIFIER(out_format[i])) continue;
1853 2038
1854 switch (out_format[++i]) { 2039 switch (out_format[++i]) {
1855 case '+': break; 2040 case '+': break;
1862 case 's': break; 2047 case 's': break;
1863 case 'N': break; 2048 case 'N': break;
1864 case 'o': break; 2049 case 'o': break;
1865 case 'a': break; 2050 case 'a': break;
1866 case 'M': break; 2051 case 'M': break;
2052 case 'Z': show_size = 1; break;
1867 case 'D': show_endian = 1; break; 2053 case 'D': show_endian = 1; break;
2054 case 'I': show_osabi = 1; break;
2055 case 'Y': show_eabi = 1; break;
1868 case 'O': show_perms = 1; break; 2056 case 'O': show_perms = 1; break;
1869 case 'x': show_pax = 1; break; 2057 case 'x': show_pax = 1; break;
1870 case 'e': show_phdr = 1; break; 2058 case 'e': show_phdr = 1; break;
1871 case 't': show_textrel = 1; break; 2059 case 't': show_textrel = 1; break;
1872 case 'r': show_rpath = 1; break; 2060 case 'r': show_rpath = 1; break;
1883 2071
1884 /* construct our default format */ 2072 /* construct our default format */
1885 } else { 2073 } else {
1886 size_t fmt_len = 30; 2074 size_t fmt_len = 30;
1887 out_format = xmalloc(sizeof(char) * fmt_len); 2075 out_format = xmalloc(sizeof(char) * fmt_len);
2076 *out_format = '\0';
1888 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2077 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1889 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 2078 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1890 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len); 2079 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
2080 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
1891 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len); 2081 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
2082 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
2083 if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1892 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2084 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1893 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2085 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1894 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2086 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1895 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2087 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1896 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2088 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1921 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1922 ret = scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1923 } 2115 }
1924 2116
1925 /* clean up */ 2117 /* clean up */
1926 free(versioned_symname);
1927 for (i = 0; ldpaths[i]; ++i)
1928 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1929 2123
1930 if (ldcache != 0) 2124 if (ldcache != 0)
1931 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1932 return ret; 2126 return ret;
1933} 2127}
1966 return envvals; 2160 return envvals;
1967} 2161}
1968 2162
1969static void parseenv(void) 2163static void parseenv(void)
1970{ 2164{
2165 color_init(false);
1971 qa_textrels = get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
1972 qa_execstack = get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
1973 qa_wx_load = get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
1974} 2169}
1975 2170
1980 free(qa_textrels); 2175 free(qa_textrels);
1981 free(qa_execstack); 2176 free(qa_execstack);
1982 free(qa_wx_load); 2177 free(qa_wx_load);
1983} 2178}
1984#endif 2179#endif
1985
1986 2180
1987int main(int argc, char *argv[]) 2181int main(int argc, char *argv[])
1988{ 2182{
1989 int ret; 2183 int ret;
1990 if (argc < 2) 2184 if (argc < 2)
1999 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD"); 2193 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
2000#endif 2194#endif
2001 return ret; 2195 return ret;
2002} 2196}
2003 2197
2004
2005/* Match filename against entries in matchlist, return TRUE 2198/* Match filename against entries in matchlist, return TRUE
2006 * if the file is listed */ 2199 * if the file is listed */
2007static int file_matches_list(const char *filename, char **matchlist) 2200static int file_matches_list(const char *filename, char **matchlist)
2008{ 2201{
2009 char **file; 2202 char **file;

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