/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.166 Revision 1.229
1/* 1/*
2 * Copyright 2003-2006 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 1.166 2006/12/11 03:31:54 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 2003-2006 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2006 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 1.229 2011/09/27 19:29:19 vapier Exp $";
11const char argv0[] = "scanelf";
12
10#include "paxinc.h" 13#include "paxinc.h"
11
12static const char *rcsid = "$Id: scanelf.c,v 1.166 2006/12/11 03:31:54 vapier Exp $";
13#define argv0 "scanelf"
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 char *xstrdup(const char *s);
31static void *xmalloc(size_t size);
32static void *xrealloc(void *ptr, size_t size);
33static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
34#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
35static inline void xchrcat(char **dst, const char append, size_t *curr_len);
36 19
37/* variables to control behavior */ 20/* variables to control behavior */
38static char match_etypes[126] = ""; 21static char *match_etypes = NULL;
39static char *ldpaths[256]; 22static array_t _ldpaths = array_init_decl, *ldpaths = &_ldpaths;
40static char scan_ldpath = 0; 23static char scan_ldpath = 0;
41static char scan_envpath = 0; 24static char scan_envpath = 0;
42static char scan_symlink = 1; 25static char scan_symlink = 1;
43static char scan_archives = 0; 26static char scan_archives = 0;
44static char dir_recurse = 0; 27static char dir_recurse = 0;
45static char dir_crossmount = 1; 28static char dir_crossmount = 1;
46static char show_pax = 0; 29static char show_pax = 0;
30static char show_perms = 0;
31static char show_size = 0;
47static char show_phdr = 0; 32static char show_phdr = 0;
48static char show_textrel = 0; 33static char show_textrel = 0;
49static char show_rpath = 0; 34static char show_rpath = 0;
50static char show_needed = 0; 35static char show_needed = 0;
51static char show_interp = 0; 36static char show_interp = 0;
52static char show_bind = 0; 37static char show_bind = 0;
53static char show_soname = 0; 38static char show_soname = 0;
54static char show_textrels = 0; 39static char show_textrels = 0;
55static char show_banner = 1; 40static char show_banner = 1;
41static char show_endian = 0;
42static char show_osabi = 0;
43static char show_eabi = 0;
56static char be_quiet = 0; 44static char be_quiet = 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, *versioned_symname = 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 gmatch = 0; 56static char g_match = 0;
67static char use_ldcache = 0; 57static char use_ldcache = 0;
68 58
69static char **qa_textrels = NULL; 59static char **qa_textrels = NULL;
70static char **qa_execstack = NULL; 60static char **qa_execstack = NULL;
71static char **qa_wx_load = NULL; 61static char **qa_wx_load = NULL;
62static char *root;
72 63
73int match_bits = 0; 64static int match_bits = 0;
74caddr_t ldcache = 0; 65static unsigned int match_perms = 0;
66static void *ldcache = NULL;
75size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
76unsigned long setpax = 0UL; 68static unsigned long setpax = 0UL;
77 69
70static int has_objdump = 0;
78 71
72/* find the path to a file by name */
73static char *which(const char *fname)
74{
75 static char fullpath[__PAX_UTILS_PATH_MAX];
76 char *path, *p;
77
78 path = getenv("PATH");
79 if (!path)
80 return NULL;
81
82 path = xstrdup(path);
83 while ((p = strrchr(path, ':')) != NULL) {
84 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
85 *p = 0;
86 if (access(fullpath, R_OK) != -1) {
87 free(path);
88 return fullpath;
89 }
90 }
91 free(path);
92 return NULL;
93}
94
95/* 1 on failure. 0 otherwise */
96static int rematch(const char *regex, const char *match, int cflags)
97{
98 regex_t preg;
99 int ret;
100
101 if ((match == NULL) || (regex == NULL))
102 return EXIT_FAILURE;
103
104 if ((ret = regcomp(&preg, regex, cflags))) {
105 char err[256];
106
107 if (regerror(ret, &preg, err, sizeof(err)))
108 fprintf(stderr, "regcomp failed: %s", err);
109 else
110 fprintf(stderr, "regcomp failed");
111
112 return EXIT_FAILURE;
113 }
114 ret = regexec(&preg, match, 0, NULL, 0);
115 regfree(&preg);
116
117 return ret;
118}
79 119
80/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
81static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
82{ 122{
83 /* 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
84#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
85 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
86 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
87 /* debug sections */ \
88 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
89 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
90 /* runtime sections */ \
91 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
92 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
93 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
94 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
95 } else { \ 138 } else \
96 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
97 } \
98 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
99 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
100 } else { \ 144 } else \
101 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
102 } \
103 } 146 }
104 GET_SYMTABS(32) 147 GET_SYMTABS(32)
105 GET_SYMTABS(64) 148 GET_SYMTABS(64)
106} 149}
107 150
136 } \ 179 } \
137 } 180 }
138 SHOW_PAX(32) 181 SHOW_PAX(32)
139 SHOW_PAX(64) 182 SHOW_PAX(64)
140 } 183 }
141
142 184
143 if (fix_elf && setpax) { 185 if (fix_elf && setpax) {
144 /* set the chpax settings */ 186 /* set the chpax settings */
145 if (elf->elf_class == ELFCLASS32) { 187 if (elf->elf_class == ELFCLASS32) {
146 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)
205 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 247 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
206 found = found_relro; \ 248 found = found_relro; \
207 offset = 4; \ 249 offset = 4; \
208 check_flags = PF_X; \ 250 check_flags = PF_X; \
209 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 251 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
210 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \ 252 if (EGET(ehdr->e_type) == ET_DYN || EGET(ehdr->e_type) == ET_EXEC) \
211 if (multi_load++ > max_pt_load) \ 253 if (multi_load++ > max_pt_load) \
212 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \ 254 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
213 if (file_matches_list(elf->filename, qa_wx_load)) \ 255 if (file_matches_list(elf->filename, qa_wx_load)) \
214 continue; \ 256 continue; \
215 found = found_load; \ 257 found = found_load; \
232 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
233 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
234 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
235 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
236 char *str; \ 278 char *str; \
237 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
238 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
239 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
240 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
241 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
242 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
273 return NULL; 315 return NULL;
274 else 316 else
275 return ret; 317 return ret;
276} 318}
277 319
320/*
321 * See if this ELF contains a DT_TEXTREL tag in any of its
322 * PT_DYNAMIC sections.
323 */
278static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 324static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
279{ 325{
280 static const char *ret = "TEXTREL"; 326 static const char *ret = "TEXTREL";
281 unsigned long i; 327 unsigned long i;
282 328
290 Elf ## B ## _Dyn *dyn; \ 336 Elf ## B ## _Dyn *dyn; \
291 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 337 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
292 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 338 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
293 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
294 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
295 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 341 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
296 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
297 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
298 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
299 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
300 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)*/ \
301 *found_textrel = 1; \ 347 *found_textrel = 1; \
302 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
303 return (be_wewy_wewy_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
312 if (be_quiet || be_wewy_wewy_quiet) 358 if (be_quiet || be_wewy_wewy_quiet)
313 return NULL; 359 return NULL;
314 else 360 else
315 return " - "; 361 return " - ";
316} 362}
363
364/*
365 * Scan the .text section to see if there are any relocations in it.
366 * Should rewrite this to check PT_LOAD sections that are marked
367 * Executable rather than the section named '.text'.
368 */
317static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) 369static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
318{ 370{
319 unsigned long s, r, rmax; 371 unsigned long s, r, rmax;
320 void *symtab_void, *strtab_void, *text_void; 372 void *symtab_void, *strtab_void, *text_void;
321 373
342 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
343 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
344 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
345 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
346 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
347 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
348 rela = NULL; \ 400 rela = NULL; \
349 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
350 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
351 rel = NULL; \ 403 rel = NULL; \
352 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
353 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
354 } else \ 406 } else \
355 continue; \ 407 continue; \
356 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
357 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
372 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
373 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
374 } else \ 426 } else \
375 *found_textrels = 1; \ 427 *found_textrels = 1; \
376 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
377 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
378 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
379 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
380 continue; \ 432 continue; \
381 } \ 433 } \
382 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
383 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
386 sym = NULL; \ 438 sym = NULL; \
387 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
388 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
389 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
390 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
391 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)); \
392 else \ 444 else \
393 printf("(memory/fake?)"); \ 445 printf("(memory/data?)"); \
394 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
395 /* 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 */ \
396 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
397 func = NULL; \ 449 func = NULL; \
398 offset_tmp = 0; \ 450 offset_tmp = 0; \
399 while (sym_max--) { \ 451 while (sym_max--) { \
400 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) { \
401 func = sym; \ 453 func = sym; \
402 offset_tmp = EGET(sym->st_value); \ 454 offset_tmp = EGET(sym->st_value); \
403 } \ 455 } \
404 ++sym; \ 456 ++sym; \
405 } \ 457 } \
406 printf(" in "); \ 458 printf(" in "); \
407 if (func && func->st_name) \ 459 if (func && func->st_name) { \
408 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \ 460 const char *func_name = elf->data + EGET(strtab->sh_offset) + EGET(func->st_name); \
461 if (r_offset > EGET(func->st_size)) \
462 printf("(optimized out: previous %s)", func_name); \
409 else \ 463 else \
410 printf("(NULL: fake?)"); \ 464 printf("%s", func_name); \
465 } else \
466 printf("(optimized out)"); \
411 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 467 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
468 if (be_verbose && has_objdump) { \
469 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
470 char *sysbuf; \
471 size_t syslen; \
472 int sysret; \
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"; \
474 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
475 sysbuf = xmalloc(syslen); \
476 if (end_addr < r_offset) \
477 /* not uncommon when things are optimized out */ \
478 end_addr = r_offset + 0x100; \
479 snprintf(sysbuf, syslen, sysfmt, \
480 (unsigned long)offset_tmp, \
481 (unsigned long)end_addr, \
482 elf->filename, \
483 (unsigned long)r_offset); \
484 fflush(stdout); \
485 sysret = system(sysbuf); \
486 fflush(stdout); \
487 free(sysbuf); \
488 } \
412 } \ 489 } \
413 } } 490 } }
414 SHOW_TEXTRELS(32) 491 SHOW_TEXTRELS(32)
415 SHOW_TEXTRELS(64) 492 SHOW_TEXTRELS(64)
416 } 493 }
418 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);
419 496
420 return NULL; 497 return NULL;
421} 498}
422 499
423static void rpath_security_checks(elfobj *, char *, const char *);
424static 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)
425{ 501{
426 struct stat st; 502 struct stat st;
427 switch (*item) { 503 switch (*item) {
428 case '/': break; 504 case '/': break;
435 break; 511 break;
436 case '$': 512 case '$':
437 if (fstat(elf->fd, &st) != -1) 513 if (fstat(elf->fd, &st) != -1)
438 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 514 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
439 warnf("Security problem with %s='%s' in %s with mode set of %o", 515 warnf("Security problem with %s='%s' in %s with mode set of %o",
440 dt_type, item, elf->filename, st.st_mode & 07777); 516 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
441 break; 517 break;
442 default: 518 default:
443 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename); 519 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
444 break; 520 break;
445 } 521 }
446} 522}
447static 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)
448{ 524{
449 unsigned long i, s; 525 unsigned long i;
450 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
451 void *strtbl_void; 527 void *strtbl_void;
452 528
453 if (!show_rpath) return; 529 if (!show_rpath) return;
454 530
465 Elf ## B ## _Off offset; \ 541 Elf ## B ## _Off offset; \
466 Elf ## B ## _Xword word; \ 542 Elf ## B ## _Xword word; \
467 /* Scan all the program headers */ \ 543 /* Scan all the program headers */ \
468 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 544 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
469 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
470 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 546 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
471 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
472 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
473 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
474 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
475 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
476 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
477 r = &rpath; \ 553 r = &rpath; \
478 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
479 r = &runpath; \ 555 r = &runpath; \
483 } \ 559 } \
484 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
485 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
486 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
487 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
488 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
489 /* 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 */ \
490 if (fix_elf) \ 566 if (fix_elf) \
491 offset = strlen(*r); \ 567 offset = strlen(*r); \
492 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
493 if (be_quiet) { \ 569 if (be_quiet) { \
499 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
500 while (start) { \ 576 while (start) { \
501 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
502 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
503 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
504 if (use_ldcache) \ 580 if (use_ldcache) { \
505 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
506 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
507 *r = end; \ 585 *r = end; \
508 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
509 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
510 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
511 (*r)++; \ 589 (*r)++; \
512 break; \ 590 break; \
513 } \ 591 } \
592 } \
514 if (!*r || !end) \ 593 if (!*r || !end) \
515 break; \ 594 break; \
516 else \ 595 else \
517 start = start + len + 1; \ 596 start = start + len + 1; \
518 } \ 597 } \
603#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
604#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
605#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
606#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
607 686
608static char *lookup_cache_lib(elfobj *, char *);
609
610#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
611 688
612static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
613{ 690{
614 int fd = 0; 691 int fd;
615 char *strs; 692 char *strs;
616 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
617 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
618 struct stat st; 695 struct stat st;
619 696
620 typedef struct { 697 typedef struct {
621 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
622 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
632 libentry_t *libent; 709 libentry_t *libent;
633 710
634 if (fname == NULL) 711 if (fname == NULL)
635 return NULL; 712 return NULL;
636 713
637 if (ldcache == 0) { 714 if (ldcache == NULL) {
638 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)
639 return NULL; 720 return NULL;
640 721
641 /* 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 */
642 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
643 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
644
645 close(fd); 725 close(fd);
646 726
647 if (ldcache == (caddr_t)-1) { 727 if (ldcache == MAP_FAILED) {
648 ldcache = 0; 728 ldcache = NULL;
649 return NULL; 729 return NULL;
650 } 730 }
651 731
652 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;
653 return NULL; 737 return NULL;
654 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
655 return NULL;
656 } 738 }
739 } else
740 header = ldcache;
657 741
658 header = (header_t *) ldcache;
659 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
660 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
661 744
662 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
663 /* 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
664 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
665 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
666 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
667 continue; 751 continue;
668 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
669 continue; 753 continue;
670 754
671 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
672 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
673 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
674 } 761 }
762
675 return buf; 763 return buf;
676} 764}
765
677#elif defined(__NetBSD__) 766#elif defined(__NetBSD__)
678static char *lookup_cache_lib(elfobj *elf, char *fname) 767static char *lookup_cache_lib(elfobj *elf, char *fname)
679{ 768{
680 static char buf[__PAX_UTILS_PATH_MAX] = ""; 769 static char buf[__PAX_UTILS_PATH_MAX] = "";
681 static struct stat st; 770 static struct stat st;
682 771 size_t n;
683 char **ldpath; 772 char *ldpath;
684 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 773
774 array_for_each(ldpath, n, ldpath) {
685 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))
686 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 */
687 777
688 if (stat(buf, &st) != 0) 778 if (stat(buf, &st) != 0)
689 continue; /* if the lib doesn't exist in *ldpath, look further */ 779 continue; /* if the lib doesn't exist in *ldpath, look further */
690 780
698 788
699 /* not found in any path */ 789 /* not found in any path */
700 return NULL; 790 return NULL;
701} 791}
702#else 792#else
793#ifdef __ELF__
703#warning Cache support not implemented for your target 794#warning Cache support not implemented for your target
795#endif
704static char *lookup_cache_lib(elfobj *elf, char *fname) 796static char *lookup_cache_lib(elfobj *elf, char *fname)
705{ 797{
706 return NULL; 798 return NULL;
707} 799}
708#endif 800#endif
712 unsigned long i; 804 unsigned long i;
713 char *needed; 805 char *needed;
714 void *strtbl_void; 806 void *strtbl_void;
715 char *p; 807 char *p;
716 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
717 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
718 815
719 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
720 817
721 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
722#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
724 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
725 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
726 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
727 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
728 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 */ \
729 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
730 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 829 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) \
830 continue; \
731 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
732 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 */ \
733 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
734 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
735 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
736 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
737 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
738 ++dyn; \ 840 ++dyn; \
739 continue; \ 841 continue; \
740 } \ 842 } \
741 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
742 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
743 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
744 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
745 if (use_ldcache) \ 848 if (use_ldcache) \
746 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
747 needed = p; \ 850 needed = p; \
748 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
749 } \ 852 } \
750 *found_needed = 1; \ 853 *found_needed = 1; \
751 } else { \ 854 } else { \
752 if (!strncmp(find_lib, needed, strlen( !gmatch ? 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)) { \
753 *found_lib = 1; \ 864 *found_lib = 1; \
754 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
755 } \ 866 } \
756 } \ 867 } \
757 } \ 868 } \
758 ++dyn; \ 869 ++dyn; \
759 } \ 870 } \
800 Elf ## B ## _Dyn *dyn; \ 911 Elf ## B ## _Dyn *dyn; \
801 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 912 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
802 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 913 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
803 Elf ## B ## _Off offset; \ 914 Elf ## B ## _Off offset; \
804 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
805 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 916 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
806 dynamic = 1; \ 917 dynamic = 1; \
807 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
808 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
809 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
810 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
811 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
812 (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)) \
813 { \ 924 { \
814 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
827 /* 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 */
828 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))))) {
829 return NULL; 940 return NULL;
830 } else { 941 } else {
831 *found_bind = 1; 942 *found_bind = 1;
832 return (char *) (dynamic ? "LAZY" : "STATIC"); 943 return (char *)(dynamic ? "LAZY" : "STATIC");
833 } 944 }
834} 945}
835static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
836{ 947{
837 unsigned long i; 948 unsigned long i;
849 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 960 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
850 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 961 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
851 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 962 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
852 Elf ## B ## _Off offset; \ 963 Elf ## B ## _Off offset; \
853 /* only look for soname in shared objects */ \ 964 /* only look for soname in shared objects */ \
854 if (ehdr->e_type != ET_DYN) \ 965 if (EGET(ehdr->e_type) != ET_DYN) \
855 return NULL; \ 966 return NULL; \
856 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
857 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 968 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
858 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
859 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
860 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
861 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
862 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
863 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
864 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
865 ++dyn; \ 976 ++dyn; \
866 continue; \ 977 continue; \
867 } \ 978 } \
868 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
869 *found_soname = 1; \ 980 *found_soname = 1; \
870 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
871 } \ 982 } \
872 ++dyn; \ 983 ++dyn; \
873 } \ 984 } \
876 SHOW_SONAME(64) 987 SHOW_SONAME(64)
877 } 988 }
878 989
879 return NULL; 990 return NULL;
880} 991}
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
881static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
882{ 1161{
883 unsigned long i; 1162 unsigned long i;
884 char *ret; 1163 char *ret;
885 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
886 1165
887 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
888 ret = find_sym; 1167 ret = NULL;
889 1168
890 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
891 1170
892 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
893#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
894 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
895 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
896 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
897 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)); \
898 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
899 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
900 if (cnt) \ 1180 if (cnt) \
901 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
902 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 } \
903 if (sym->st_name) { \ 1187 if (sym->st_name) { \
904 /* make sure the symbol name is in acceptable memory range */ \ 1188 /* make sure the symbol name is in acceptable memory range */ \
905 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
906 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
907 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
908 ++sym; \ 1192 ++sym; \
909 continue; \ 1193 continue; \
910 } \ 1194 } \
911 /* debug display ... show all symbols and some extra info */ \ 1195 scanelf_match_symname(elf, found_sym, \
912 if (*ret == '*') { \ 1196 &ret, &ret_len, symname, \
913 printf("%s(%s) %5lX %15s %s\n", \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
914 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
915 elf->base_filename, \ 1199 EGET(sym->st_shndx), \
916 (unsigned long)sym->st_size, \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
917 get_elfstttype(sym->st_info), \ 1201 EGET(sym->st_size)); \
918 symname); \
919 *found_sym = 1; \
920 } else { \
921 /* allow the user to specify a comma delimited list of symbols to search for */ \
922 char *this_sym, *this_sym_ver, *next_sym; \
923 this_sym = ret; \
924 this_sym_ver = versioned_symname; \
925 do { \
926 next_sym = strchr(this_sym, ','); \
927 if (next_sym == NULL) \
928 next_sym = this_sym + strlen(this_sym); \
929 /* do we want a defined symbol ? */ \
930 if (*this_sym == '+') { \
931 if (sym->st_shndx == SHN_UNDEF) \
932 goto skip_this_sym##B; \
933 ++this_sym; \
934 ++this_sym_ver; \
935 /* do we want an undefined symbol ? */ \
936 } else if (*this_sym == '-') { \
937 if (sym->st_shndx != SHN_UNDEF) \
938 goto skip_this_sym##B; \
939 ++this_sym; \
940 ++this_sym_ver; \
941 } \
942 /* ok, lets compare the name now */ \
943 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
944 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
945 if (be_semi_verbose) { \
946 char buf[126]; \
947 snprintf(buf, sizeof(buf), "%lX %s %s", \
948 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
949 ret = buf; \
950 } else \
951 ret = this_sym; \
952 (*found_sym)++; \
953 goto break_out; \
954 } \
955 skip_this_sym##B: this_sym = next_sym + 1; \
956 } while (*next_sym != '\0'); \
957 } \
958 } \ 1202 } \
959 ++sym; \ 1203 ++sym; \
960 } } 1204 } }
961 FIND_SYM(32) 1205 FIND_SYM(32)
962 FIND_SYM(64) 1206 FIND_SYM(64)
968 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
969 return ret; 1213 return ret;
970 if (be_quiet) 1214 if (be_quiet)
971 return NULL; 1215 return NULL;
972 else 1216 else
973 return (char *)" - "; 1217 return " - ";
974} 1218}
975 1219
976
977static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
978{ 1221{
979 if (!find_section) 1222 if (!find_section)
980 return NULL; 1223 return NULL;
981 1224
982#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
983 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
984 int invert; \ 1228 int invert; \
1229 const char *section_name; \
985 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
986 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
987 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
988 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)) \
989 *found_section = 1; \ 1241 *found_section = 1; \
990 } 1242 }
991 FIND_SECTION(32) 1243 FIND_SECTION(32)
992 FIND_SECTION(64) 1244 FIND_SECTION(64)
993 1245
998 return find_section; 1250 return find_section;
999 1251
1000 if (be_quiet) 1252 if (be_quiet)
1001 return NULL; 1253 return NULL;
1002 else 1254 else
1003 return (char *)" - "; 1255 return " - ";
1004} 1256}
1005 1257
1006/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1007#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1008static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1009{ 1261{
1010 unsigned long i; 1262 unsigned long i;
1011 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1012 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
1026 printf("%s: scanning file\n", elf->filename); 1278 printf("%s: scanning file\n", elf->filename);
1027 1279
1028 /* init output buffer */ 1280 /* init output buffer */
1029 if (!out_buffer) { 1281 if (!out_buffer) {
1030 out_len = sizeof(char) * 80; 1282 out_len = sizeof(char) * 80;
1031 out_buffer = (char*)xmalloc(out_len); 1283 out_buffer = xmalloc(out_len);
1032 } 1284 }
1033 *out_buffer = '\0'; 1285 *out_buffer = '\0';
1034 1286
1035 /* show the header */ 1287 /* show the header */
1036 if (!be_quiet && show_banner) { 1288 if (!be_quiet && show_banner) {
1047 case 'o': prints(" TYPE "); break; 1299 case 'o': prints(" TYPE "); break;
1048 case 'x': prints(" PAX "); break; 1300 case 'x': prints(" PAX "); break;
1049 case 'e': prints("STK/REL/PTL "); break; 1301 case 'e': prints("STK/REL/PTL "); break;
1050 case 't': prints("TEXTREL "); break; 1302 case 't': prints("TEXTREL "); break;
1051 case 'r': prints("RPATH "); break; 1303 case 'r': prints("RPATH "); break;
1304 case 'M': prints("CLASS "); break;
1052 case 'n': prints("NEEDED "); break; 1305 case 'n': prints("NEEDED "); break;
1053 case 'i': prints("INTERP "); break; 1306 case 'i': prints("INTERP "); break;
1054 case 'b': prints("BIND "); break; 1307 case 'b': prints("BIND "); break;
1308 case 'Z': prints("SIZE "); break;
1055 case 'S': prints("SONAME "); break; 1309 case 'S': prints("SONAME "); break;
1056 case 's': prints("SYM "); break; 1310 case 's': prints("SYM "); break;
1057 case 'N': prints("LIB "); break; 1311 case 'N': prints("LIB "); break;
1058 case 'T': prints("TEXTRELS "); break; 1312 case 'T': prints("TEXTRELS "); break;
1059 case 'k': prints("SECTION "); break; 1313 case 'k': prints("SECTION "); break;
1060 case 'a': prints("ARCH "); break; 1314 case 'a': prints("ARCH "); break;
1315 case 'I': prints("OSABI "); break;
1316 case 'Y': prints("EABI "); break;
1317 case 'O': prints("PERM "); break;
1318 case 'D': prints("ENDIAN "); break;
1061 default: warnf("'%c' has no title ?", out_format[i]); 1319 default: warnf("'%c' has no title ?", out_format[i]);
1062 } 1320 }
1063 } 1321 }
1064 if (!found_file) prints("FILE "); 1322 if (!found_file) prints("FILE ");
1065 prints("\n"); 1323 prints("\n");
1069 1327
1070 /* dump all the good stuff */ 1328 /* dump all the good stuff */
1071 for (i = 0; out_format[i]; ++i) { 1329 for (i = 0; out_format[i]; ++i) {
1072 const char *out; 1330 const char *out;
1073 const char *tmp; 1331 const char *tmp;
1074 1332 static char ubuf[sizeof(unsigned long)*2];
1075 if (!IS_MODIFIER(out_format[i])) { 1333 if (!IS_MODIFIER(out_format[i])) {
1076 xchrcat(&out_buffer, out_format[i], &out_len); 1334 xchrcat(&out_buffer, out_format[i], &out_len);
1077 continue; 1335 continue;
1078 } 1336 }
1079 1337
1115 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1373 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1116 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break; 1374 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
1117 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1118 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;
1119 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;
1378 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1379 case 'D': out = get_endian(elf); break;
1380 case 'O': out = strfileperms(elf->filename); break;
1120 case 'n': 1381 case 'n':
1121 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;
1122 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1123 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1124 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1125 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1386 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1126 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1387 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1127 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;;
1128 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1129 } 1393 }
1130 if (out) { 1394 if (out)
1131 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1132 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1133 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1134 else
1135 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1136 }
1137 } 1396 }
1138 1397
1139#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1140 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1141 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1173 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1174 goto label_done; 1433 goto label_done;
1175 break; 1434 break;
1176 default: break; 1435 default: break;
1177 } 1436 }
1178 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1179 char sbuf[126]; 1438 char sbuf[126];
1180 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1181 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1182 char *p; 1441 char *p;
1183 while((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1184 *p = 0; 1443 *p = 0;
1185 if (etype_lookup(p+1) == get_etype(elf)) 1444 if (etype_lookup(p+1) == get_etype(elf))
1186 goto label_ret; 1445 goto label_ret;
1187 } 1446 }
1188 } 1447 }
1208 1467
1209 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1210 if (ar == NULL) 1469 if (ar == NULL)
1211 return 1; 1470 return 1;
1212 1471
1213 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);
1214 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");
1215 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);
1216 if (elf) { 1478 if (elf) {
1217 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1218 unreadelf(elf); 1480 unreadelf(elf);
1219 } 1481 }
1220 } 1482 }
1239 if (!S_ISREG(st->st_mode)) { 1501 if (!S_ISREG(st->st_mode)) {
1240 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1502 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1241 return 1; 1503 return 1;
1242 } 1504 }
1243 1505
1506 if (match_perms) {
1507 if ((st->st_mode | match_perms) != st->st_mode)
1508 return 1;
1509 }
1244 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1510 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1245 return 1; 1511 return 1;
1246 1512
1247 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives) 1513 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1248 /* if it isn't an ELF, maybe it's an .a archive */ 1514 /* if it isn't an ELF, maybe it's an .a archive */
1249 scanelf_archive(filename, fd, st->st_size); 1515 scanelf_archive(filename, fd, st->st_size);
1250 1516
1251 close(fd); 1517 close(fd);
1252 return 0; 1518 return 0;
1519}
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;
1253} 1529}
1254 1530
1255/* 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 */
1256static int scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1257{ 1533{
1258 register DIR *dir; 1534 register DIR *dir;
1259 register struct dirent *dentry; 1535 register struct dirent *dentry;
1260 struct stat st_top, st; 1536 struct stat st_top, st;
1261 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1262 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1263 int ret = 0; 1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1264 1543
1265 /* make sure path exists */ 1544 /* make sure path exists */
1266 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1267 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1268 return 1; 1547 return 1;
1332static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1333{ 1612{
1334 FILE *fp = NULL; 1613 FILE *fp = NULL;
1335 char *p; 1614 char *p;
1336 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1337 1617
1338 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1339 return i;
1340 1619
1341 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1342 return i; 1621 return i;
1343 1622
1344 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1345 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1346 *p = 0; 1625 *p = 0;
1347 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1348 *p = 0; 1627 *p = 0;
1349#ifdef __linux__ 1628
1350 // recursive includes of the same file will make this segfault. 1629 /* recursive includes of the same file will make this segfault. */
1351 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1352 glob64_t gl; 1631 glob_t gl;
1353 size_t x; 1632 size_t x;
1354 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1355 1634
1356 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1357 1638
1358 if (path[8] != '/') 1639 if (path[8] != '/')
1359 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1360 else 1641 else
1361 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1362 1643
1363 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1364 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1365 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1366 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1367 continue; 1648 continue;
1368 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1369 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1370 globfree64(&gl);
1371 return i;
1372 }
1373 } 1650 }
1374 globfree64 (&gl); 1651 globfree(&gl);
1375 continue; 1652 continue;
1376 } 1653 }
1377 } 1654 }
1378#endif 1655
1379 if (*path != '/') 1656 if (*path != '/')
1380 continue; 1657 continue;
1381 1658
1382 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1383
1384 if (i + 1 == ARRAY_SIZE(ldpaths))
1385 break;
1386 } 1660 }
1387 ldpaths[i] = NULL;
1388 1661
1389 fclose(fp); 1662 fclose(fp);
1390 return i; 1663 return i;
1391} 1664}
1392 1665
1393#elif defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1394 1667
1395static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1396{ 1669{
1397 FILE *fp = NULL; 1670 FILE *fp = NULL;
1398 char *b = NULL, *p; 1671 char *b = NULL, *p;
1399 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1400 1674
1401 if (i + 1 == ARRAY_SIZE(ldpaths)) 1675 fname = maybe_add_root(fname, _fname);
1402 return i;
1403 1676
1404 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1405 return i; 1678 return i;
1406 1679
1407 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1410 { 1683 {
1411 fclose(fp); 1684 fclose(fp);
1412 return i; 1685 return i;
1413 } 1686 }
1414 1687
1415 b = (char*)malloc(hdr.dirlistlen+1); 1688 b = xmalloc(hdr.dirlistlen + 1);
1416 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) { 1689 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1417 fclose(fp); 1690 fclose(fp);
1418 free(b); 1691 free(b);
1419 return i; 1692 return i;
1420 } 1693 }
1421 1694
1422 while ((p = strsep(&b, ":"))) { 1695 while ((p = strsep(&b, ":"))) {
1423 if (*p == '\0') continue; 1696 if (*p == '\0')
1424 ldpaths[i++] = xstrdup(p); 1697 continue;
1425 1698 xarraypush(ldpaths, p, strlen(p));
1426 if (i + 1 == ARRAY_SIZE(ldpaths))
1427 break;
1428 } 1699 }
1429 ldpaths[i] = NULL;
1430 1700
1431 free(b); 1701 free(b);
1432 fclose(fp); 1702 fclose(fp);
1433 return i; 1703 return i;
1434} 1704}
1435 1705
1436#else 1706#else
1437 1707#ifdef __ELF__
1438#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1709#endif
1439static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1440{ 1711{
1441 memset(ldpaths, 0x00, sizeof(ldpaths)); 1712 return 0;
1442} 1713}
1443
1444#endif 1714#endif
1445 1715
1446/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1447static void scanelf_ldpath() 1717static void scanelf_ldpath(void)
1448{ 1718{
1449 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1450 int i = 0; 1722 int i = 0;
1451 1723
1452 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1453 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1454 1726
1455 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1456 1728
1457 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1458 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1459 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1460 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1461 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1462 ++i; 1734 ++i;
1463 } 1735 }
1464 1736
1465 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1466 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1467 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1739 if (!scan_ull) scanelf_dir("/usr/local/lib");
1468} 1740}
1469 1741
1470/* scan env PATH for paths */ 1742/* scan env PATH for paths */
1471static void scanelf_envpath() 1743static void scanelf_envpath(void)
1472{ 1744{
1473 char *path, *p; 1745 char *path, *p;
1474 1746
1475 path = getenv("PATH"); 1747 path = getenv("PATH");
1476 if (!path) 1748 if (!path)
1483 } 1755 }
1484 1756
1485 free(path); 1757 free(path);
1486} 1758}
1487 1759
1488/* usage / invocation handling functions */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1489#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:BhV" 1761#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZCBhV"
1490#define a_argument required_argument 1762#define a_argument required_argument
1491static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1492 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1493 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1494 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1495 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1496 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1497 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1498 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1511 {"lib", a_argument, NULL, 'N'}, 1784 {"lib", a_argument, NULL, 'N'},
1512 {"gmatch", no_argument, NULL, 'g'}, 1785 {"gmatch", no_argument, NULL, 'g'},
1513 {"textrels", no_argument, NULL, 'T'}, 1786 {"textrels", no_argument, NULL, 'T'},
1514 {"etype", a_argument, NULL, 'E'}, 1787 {"etype", a_argument, NULL, 'E'},
1515 {"bits", a_argument, NULL, 'M'}, 1788 {"bits", a_argument, NULL, 'M'},
1789 {"endian", no_argument, NULL, 'D'},
1790 {"osabi", no_argument, NULL, 'I'},
1791 {"eabi", no_argument, NULL, 'Y'},
1792 {"perms", a_argument, NULL, 'O'},
1793 {"size", no_argument, NULL, 'Z'},
1516 {"all", no_argument, NULL, 'a'}, 1794 {"all", no_argument, NULL, 'a'},
1517 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1518 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1519 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1520 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1521 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1522 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1523 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1524 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1525 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1526}; 1805};
1527 1806
1528static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1529 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1530 "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)",
1531 "Scan directories recursively", 1811 "Scan directories recursively",
1532 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1533 "Don't scan symlinks", 1813 "Don't scan symlinks",
1534 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1535 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1544 "Print BIND information", 1824 "Print BIND information",
1545 "Print SONAME information", 1825 "Print SONAME information",
1546 "Find a specified symbol", 1826 "Find a specified symbol",
1547 "Find a specified section", 1827 "Find a specified section",
1548 "Find a specified library", 1828 "Find a specified library",
1549 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1550 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1551 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1552 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1553 "Print all scanned info (-x -e -t -r -b)\n", 1833 "Print Endianness",
1834 "Print OSABI",
1835 "Print EABI (EM_ARM Only)",
1836 "Print only ELF files matching octal permissions",
1837 "Print ELF file size",
1838 "Print all useful/simple info\n",
1554 "Only output 'bad' things", 1839 "Only output 'bad' things",
1555 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1556 "Use specified format for output", 1841 "Use specified format for output",
1557 "Read input stream from a filename", 1842 "Read input stream from a filename",
1558 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1559 "Don't display the header", 1845 "Don't display the header",
1560 "Print this help and exit", 1846 "Print this help and exit",
1561 "Print version and exit", 1847 "Print version and exit",
1562 NULL 1848 NULL
1563}; 1849};
1571 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1572 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1573 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1574 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 1860 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1575 long_opts[i].name, opts_help[i]); 1861 long_opts[i].name, opts_help[i]);
1862 else if (long_opts[i].val > '~')
1863 printf(" --%-7s <arg> * %s\n",
1864 long_opts[i].name, opts_help[i]);
1576 else 1865 else
1577 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1578 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1579 1868
1580 if (status != EXIT_SUCCESS) 1869 puts("\nFor more information, see the scanelf(1) manpage");
1581 exit(status);
1582
1583 puts("\nThe format modifiers for the -F option are:");
1584 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1585 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1586 puts(" i INTERP \tb BIND \ts symbol");
1587 puts(" N library \to Type \tT TEXTRELs");
1588 puts(" S SONAME \tk section \ta arch");
1589 puts(" p filename (with search path removed)");
1590 puts(" f filename (short name/basename)");
1591 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1592
1593 puts("\nELF Etypes:");
1594 print_etypes(stdout);
1595
1596 exit(status); 1870 exit(status);
1597} 1871}
1598 1872
1599/* parse command line arguments and preform needed actions */ 1873/* parse command line arguments and preform needed actions */
1600#define do_pax_state(option, flag) \ 1874#define do_pax_state(option, flag) \
1625 case 'f': 1899 case 'f':
1626 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");
1627 from_file = optarg; 1901 from_file = optarg;
1628 break; 1902 break;
1629 case 'E': 1903 case 'E':
1630 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1631 break; 1905 break;
1632 case 'M': 1906 case 'M':
1633 match_bits = atoi(optarg); 1907 match_bits = atoi(optarg);
1908 if (match_bits == 0) {
1909 if (strcmp(optarg, "ELFCLASS32") == 0)
1910 match_bits = 32;
1911 if (strcmp(optarg, "ELFCLASS64") == 0)
1912 match_bits = 64;
1913 }
1914 break;
1915 case 'O':
1916 if (sscanf(optarg, "%o", &match_perms) == -1)
1917 match_bits = 0;
1634 break; 1918 break;
1635 case 'o': { 1919 case 'o': {
1636 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1637 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1638 break; 1922 break;
1639 } 1923 }
1640 case 'k': 1924 case 'k':
1641 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1642 find_section = optarg;
1643 break; 1926 break;
1644 case 's': { 1927 case 's': {
1645 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");
1646 find_sym = optarg; 1929 find_sym = optarg;
1647 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1648 sprintf(versioned_symname, "%s@", find_sym);
1649 break; 1930 break;
1650 } 1931 }
1651 case 'N': { 1932 case 'N':
1652 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1653 find_lib = optarg;
1654 break; 1934 break;
1655 }
1656
1657 case 'F': { 1935 case 'F': {
1658 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");
1659 out_format = optarg; 1937 out_format = optarg;
1660 break; 1938 break;
1661 } 1939 }
1662 case 'z': { 1940 case 'z': {
1663 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1941 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1664 size_t x; 1942 size_t x;
1665 1943
1666 for (x = 0 ; x < strlen(optarg); x++) { 1944 for (x = 0; x < strlen(optarg); x++) {
1667 switch(optarg[x]) { 1945 switch (optarg[x]) {
1668 case 'p': 1946 case 'p':
1669 case 'P': 1947 case 'P':
1670 do_pax_state(optarg[x], PAGEEXEC); 1948 do_pax_state(optarg[x], PAGEEXEC);
1671 break; 1949 break;
1672 case 's': 1950 case 's':
1700 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1978 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1701 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1979 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1702 setpax = flags; 1980 setpax = flags;
1703 break; 1981 break;
1704 } 1982 }
1983 case 'Z': show_size = 1; break;
1705 case 'g': gmatch = 1; break; 1984 case 'g': g_match = 1; break;
1706 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1707 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1708 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1709 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1710 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1711 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1712 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1713 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1721 case 'b': show_bind = 1; break; 2001 case 'b': show_bind = 1; break;
1722 case 'S': show_soname = 1; break; 2002 case 'S': show_soname = 1; break;
1723 case 'T': show_textrels = 1; break; 2003 case 'T': show_textrels = 1; break;
1724 case 'q': be_quiet = 1; break; 2004 case 'q': be_quiet = 1; break;
1725 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1726 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break; 2006 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1727 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;
1728 case ':': 2013 case ':':
1729 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1730 case '?': 2015 case '?':
1731 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1732 default: 2017 default:
1733 err("Unhandled option '%c'; please report this", i); 2018 err("Unhandled option '%c'; please report this", i);
1734 } 2019 }
1735 } 2020 }
1736 2021 if (show_textrels && be_verbose) {
2022 if (which("objdump") != NULL)
2023 has_objdump = 1;
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);
1737 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1738 if (out_format) { 2031 if (out_format) {
1739 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1740 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1741 show_textrels = 0; 2034 show_textrels = show_perms = show_endian = show_size = \
2035 show_osabi = show_eabi = 0;
1742 for (i = 0; out_format[i]; ++i) { 2036 for (i = 0; out_format[i]; ++i) {
1743 if (!IS_MODIFIER(out_format[i])) continue; 2037 if (!IS_MODIFIER(out_format[i])) continue;
1744 2038
1745 switch (out_format[++i]) { 2039 switch (out_format[++i]) {
1746 case '+': break; 2040 case '+': break;
1752 case 'k': break; 2046 case 'k': break;
1753 case 's': break; 2047 case 's': break;
1754 case 'N': break; 2048 case 'N': break;
1755 case 'o': break; 2049 case 'o': break;
1756 case 'a': break; 2050 case 'a': break;
2051 case 'M': break;
2052 case 'Z': show_size = 1; break;
2053 case 'D': show_endian = 1; break;
2054 case 'I': show_osabi = 1; break;
2055 case 'Y': show_eabi = 1; break;
2056 case 'O': show_perms = 1; break;
1757 case 'x': show_pax = 1; break; 2057 case 'x': show_pax = 1; break;
1758 case 'e': show_phdr = 1; break; 2058 case 'e': show_phdr = 1; break;
1759 case 't': show_textrel = 1; break; 2059 case 't': show_textrel = 1; break;
1760 case 'r': show_rpath = 1; break; 2060 case 'r': show_rpath = 1; break;
1761 case 'n': show_needed = 1; break; 2061 case 'n': show_needed = 1; break;
1770 } 2070 }
1771 2071
1772 /* construct our default format */ 2072 /* construct our default format */
1773 } else { 2073 } else {
1774 size_t fmt_len = 30; 2074 size_t fmt_len = 30;
1775 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2075 out_format = xmalloc(sizeof(char) * fmt_len);
2076 *out_format = '\0';
1776 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2077 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1777 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 2078 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
2079 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
2080 if (show_size) xstrcat(&out_format, "%Z ", &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);
1778 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2084 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1779 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2085 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1780 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2086 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1781 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2087 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1782 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2088 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1807 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1808 ret = scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1809 } 2115 }
1810 2116
1811 /* clean up */ 2117 /* clean up */
1812 free(versioned_symname);
1813 for (i = 0; ldpaths[i]; ++i)
1814 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1815 2123
1816 if (ldcache != 0) 2124 if (ldcache != 0)
1817 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1818 return ret; 2126 return ret;
1819} 2127}
1849 2157
1850 /* don't want to free(env) as it contains the memory that backs 2158 /* don't want to free(env) as it contains the memory that backs
1851 * the envvals array of strings */ 2159 * the envvals array of strings */
1852 return envvals; 2160 return envvals;
1853} 2161}
2162
1854static void parseenv() 2163static void parseenv(void)
1855{ 2164{
2165 color_init(false);
1856 qa_textrels = get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
1857 qa_execstack = get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
1858 qa_wx_load = get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
1859} 2169}
1860 2170
1861#ifdef __PAX_UTILS_CLEANUP 2171#ifdef __PAX_UTILS_CLEANUP
1862static void cleanup() 2172static void cleanup(void)
1863{ 2173{
1864 free(out_format); 2174 free(out_format);
1865 free(qa_textrels); 2175 free(qa_textrels);
1866 free(qa_execstack); 2176 free(qa_execstack);
1867 free(qa_wx_load); 2177 free(qa_wx_load);
1868} 2178}
1869#endif 2179#endif
1870
1871 2180
1872int main(int argc, char *argv[]) 2181int main(int argc, char *argv[])
1873{ 2182{
1874 int ret; 2183 int ret;
1875 if (argc < 2) 2184 if (argc < 2)
1884 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD"); 2193 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1885#endif 2194#endif
1886 return ret; 2195 return ret;
1887} 2196}
1888 2197
1889
1890
1891/* utility funcs */
1892static char *xstrdup(const char *s)
1893{
1894 char *ret = strdup(s);
1895 if (!ret) err("Could not strdup(): %s", strerror(errno));
1896 return ret;
1897}
1898static void *xmalloc(size_t size)
1899{
1900 void *ret = malloc(size);
1901 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1902 return ret;
1903}
1904static void *xrealloc(void *ptr, size_t size)
1905{
1906 void *ret = realloc(ptr, size);
1907 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
1908 return ret;
1909}
1910static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1911{
1912 size_t new_len;
1913
1914 new_len = strlen(*dst) + strlen(src);
1915 if (*curr_len <= new_len) {
1916 *curr_len = new_len + (*curr_len / 2);
1917 *dst = realloc(*dst, *curr_len);
1918 if (!*dst)
1919 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1920 }
1921
1922 if (n)
1923 strncat(*dst, src, n);
1924 else
1925 strcat(*dst, src);
1926}
1927static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1928{
1929 static char my_app[2];
1930 my_app[0] = append;
1931 my_app[1] = '\0';
1932 xstrcat(dst, my_app, curr_len);
1933}
1934
1935/* Match filename against entries in matchlist, return TRUE 2198/* Match filename against entries in matchlist, return TRUE
1936 * if the file is listed */ 2199 * if the file is listed */
1937static int file_matches_list(const char *filename, char **matchlist) 2200static int file_matches_list(const char *filename, char **matchlist)
1938{ 2201{
1939 char **file; 2202 char **file;

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