/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.167 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 1.167 2007/01/08 07:55:11 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 1.167 2007/01/08 07:55:11 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); \
412 if (be_verbose) { \ 468 if (be_verbose && has_objdump) { \
469 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
413 char *sysbuf; \ 470 char *sysbuf; \
414 size_t syslen; \ 471 size_t syslen; \
472 int sysret; \
415 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"; \
416 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \ 474 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
417 sysbuf = xmalloc(syslen); \ 475 sysbuf = xmalloc(syslen); \
418 if (sysbuf) { \ 476 if (end_addr < r_offset) \
477 /* not uncommon when things are optimized out */ \
478 end_addr = r_offset + 0x100; \
419 snprintf(sysbuf, syslen, sysfmt, \ 479 snprintf(sysbuf, syslen, sysfmt, \
420 (unsigned long)offset_tmp, \ 480 (unsigned long)offset_tmp, \
421 offset_tmp + EGET(func->st_size), \ 481 (unsigned long)end_addr, \
422 elf->filename, \ 482 elf->filename, \
423 (unsigned long)r_offset); \ 483 (unsigned long)r_offset); \
484 fflush(stdout); \
424 system(sysbuf); \ 485 sysret = system(sysbuf); \
486 fflush(stdout); \
425 free(sysbuf); \ 487 free(sysbuf); \
426 } \
427 } \ 488 } \
428 } \ 489 } \
429 } } 490 } }
430 SHOW_TEXTRELS(32) 491 SHOW_TEXTRELS(32)
431 SHOW_TEXTRELS(64) 492 SHOW_TEXTRELS(64)
434 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);
435 496
436 return NULL; 497 return NULL;
437} 498}
438 499
439static void rpath_security_checks(elfobj *, char *, const char *);
440static 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)
441{ 501{
442 struct stat st; 502 struct stat st;
443 switch (*item) { 503 switch (*item) {
444 case '/': break; 504 case '/': break;
451 break; 511 break;
452 case '$': 512 case '$':
453 if (fstat(elf->fd, &st) != -1) 513 if (fstat(elf->fd, &st) != -1)
454 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 514 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
455 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",
456 dt_type, item, elf->filename, st.st_mode & 07777); 516 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
457 break; 517 break;
458 default: 518 default:
459 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);
460 break; 520 break;
461 } 521 }
462} 522}
463static 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)
464{ 524{
465 unsigned long i, s; 525 unsigned long i;
466 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
467 void *strtbl_void; 527 void *strtbl_void;
468 528
469 if (!show_rpath) return; 529 if (!show_rpath) return;
470 530
481 Elf ## B ## _Off offset; \ 541 Elf ## B ## _Off offset; \
482 Elf ## B ## _Xword word; \ 542 Elf ## B ## _Xword word; \
483 /* Scan all the program headers */ \ 543 /* Scan all the program headers */ \
484 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 544 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
485 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
486 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; \
487 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
488 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
489 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
490 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
491 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
492 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
493 r = &rpath; \ 553 r = &rpath; \
494 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
495 r = &runpath; \ 555 r = &runpath; \
499 } \ 559 } \
500 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
501 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
502 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
503 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
504 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
505 /* 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 */ \
506 if (fix_elf) \ 566 if (fix_elf) \
507 offset = strlen(*r); \ 567 offset = strlen(*r); \
508 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
509 if (be_quiet) { \ 569 if (be_quiet) { \
515 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
516 while (start) { \ 576 while (start) { \
517 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
518 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
519 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
520 if (use_ldcache) \ 580 if (use_ldcache) { \
521 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
522 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
523 *r = end; \ 585 *r = end; \
524 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
525 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
526 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
527 (*r)++; \ 589 (*r)++; \
528 break; \ 590 break; \
529 } \ 591 } \
592 } \
530 if (!*r || !end) \ 593 if (!*r || !end) \
531 break; \ 594 break; \
532 else \ 595 else \
533 start = start + len + 1; \ 596 start = start + len + 1; \
534 } \ 597 } \
619#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
620#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
621#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
622#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
623 686
624static char *lookup_cache_lib(elfobj *, char *);
625
626#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
627 688
628static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
629{ 690{
630 int fd = 0; 691 int fd;
631 char *strs; 692 char *strs;
632 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
633 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
634 struct stat st; 695 struct stat st;
635 696
636 typedef struct { 697 typedef struct {
637 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
638 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
648 libentry_t *libent; 709 libentry_t *libent;
649 710
650 if (fname == NULL) 711 if (fname == NULL)
651 return NULL; 712 return NULL;
652 713
653 if (ldcache == 0) { 714 if (ldcache == NULL) {
654 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)
655 return NULL; 720 return NULL;
656 721
657 /* 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 */
658 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
659 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
660
661 close(fd); 725 close(fd);
662 726
663 if (ldcache == (caddr_t)-1) { 727 if (ldcache == MAP_FAILED) {
664 ldcache = 0; 728 ldcache = NULL;
665 return NULL; 729 return NULL;
666 } 730 }
667 731
668 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;
669 return NULL; 737 return NULL;
670 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
671 return NULL;
672 } 738 }
739 } else
740 header = ldcache;
673 741
674 header = (header_t *) ldcache;
675 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
676 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
677 744
678 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
679 /* 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
680 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
681 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
682 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
683 continue; 751 continue;
684 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
685 continue; 753 continue;
686 754
687 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
688 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
689 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
690 } 761 }
762
691 return buf; 763 return buf;
692} 764}
765
693#elif defined(__NetBSD__) 766#elif defined(__NetBSD__)
694static char *lookup_cache_lib(elfobj *elf, char *fname) 767static char *lookup_cache_lib(elfobj *elf, char *fname)
695{ 768{
696 static char buf[__PAX_UTILS_PATH_MAX] = ""; 769 static char buf[__PAX_UTILS_PATH_MAX] = "";
697 static struct stat st; 770 static struct stat st;
698 771 size_t n;
699 char **ldpath; 772 char *ldpath;
700 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 773
774 array_for_each(ldpath, n, ldpath) {
701 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))
702 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 */
703 777
704 if (stat(buf, &st) != 0) 778 if (stat(buf, &st) != 0)
705 continue; /* if the lib doesn't exist in *ldpath, look further */ 779 continue; /* if the lib doesn't exist in *ldpath, look further */
706 780
714 788
715 /* not found in any path */ 789 /* not found in any path */
716 return NULL; 790 return NULL;
717} 791}
718#else 792#else
793#ifdef __ELF__
719#warning Cache support not implemented for your target 794#warning Cache support not implemented for your target
795#endif
720static char *lookup_cache_lib(elfobj *elf, char *fname) 796static char *lookup_cache_lib(elfobj *elf, char *fname)
721{ 797{
722 return NULL; 798 return NULL;
723} 799}
724#endif 800#endif
728 unsigned long i; 804 unsigned long i;
729 char *needed; 805 char *needed;
730 void *strtbl_void; 806 void *strtbl_void;
731 char *p; 807 char *p;
732 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
733 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
734 815
735 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
736 817
737 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
738#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
740 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
741 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
742 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
743 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
744 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 */ \
745 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
746 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; \
747 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
748 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 */ \
749 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
750 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
751 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
752 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
753 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
754 ++dyn; \ 840 ++dyn; \
755 continue; \ 841 continue; \
756 } \ 842 } \
757 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
758 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
759 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
760 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
761 if (use_ldcache) \ 848 if (use_ldcache) \
762 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
763 needed = p; \ 850 needed = p; \
764 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
765 } \ 852 } \
766 *found_needed = 1; \ 853 *found_needed = 1; \
767 } else { \ 854 } else { \
768 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)) { \
769 *found_lib = 1; \ 864 *found_lib = 1; \
770 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
771 } \ 866 } \
772 } \ 867 } \
773 } \ 868 } \
774 ++dyn; \ 869 ++dyn; \
775 } \ 870 } \
816 Elf ## B ## _Dyn *dyn; \ 911 Elf ## B ## _Dyn *dyn; \
817 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 912 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
818 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 913 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
819 Elf ## B ## _Off offset; \ 914 Elf ## B ## _Off offset; \
820 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
821 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; \
822 dynamic = 1; \ 917 dynamic = 1; \
823 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
824 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
825 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
826 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
827 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
828 (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)) \
829 { \ 924 { \
830 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
843 /* 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 */
844 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))))) {
845 return NULL; 940 return NULL;
846 } else { 941 } else {
847 *found_bind = 1; 942 *found_bind = 1;
848 return (char *) (dynamic ? "LAZY" : "STATIC"); 943 return (char *)(dynamic ? "LAZY" : "STATIC");
849 } 944 }
850} 945}
851static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
852{ 947{
853 unsigned long i; 948 unsigned long i;
865 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 960 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
866 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 961 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
867 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 962 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
868 Elf ## B ## _Off offset; \ 963 Elf ## B ## _Off offset; \
869 /* only look for soname in shared objects */ \ 964 /* only look for soname in shared objects */ \
870 if (ehdr->e_type != ET_DYN) \ 965 if (EGET(ehdr->e_type) != ET_DYN) \
871 return NULL; \ 966 return NULL; \
872 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
873 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; \
874 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
875 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
876 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
877 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
878 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
879 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
880 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
881 ++dyn; \ 976 ++dyn; \
882 continue; \ 977 continue; \
883 } \ 978 } \
884 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
885 *found_soname = 1; \ 980 *found_soname = 1; \
886 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
887 } \ 982 } \
888 ++dyn; \ 983 ++dyn; \
889 } \ 984 } \
892 SHOW_SONAME(64) 987 SHOW_SONAME(64)
893 } 988 }
894 989
895 return NULL; 990 return NULL;
896} 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
897static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
898{ 1161{
899 unsigned long i; 1162 unsigned long i;
900 char *ret; 1163 char *ret;
901 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
902 1165
903 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
904 ret = find_sym; 1167 ret = NULL;
905 1168
906 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
907 1170
908 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
909#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
910 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
911 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
912 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
913 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)); \
914 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
915 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
916 if (cnt) \ 1180 if (cnt) \
917 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
918 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 } \
919 if (sym->st_name) { \ 1187 if (sym->st_name) { \
920 /* make sure the symbol name is in acceptable memory range */ \ 1188 /* make sure the symbol name is in acceptable memory range */ \
921 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
922 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
923 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
924 ++sym; \ 1192 ++sym; \
925 continue; \ 1193 continue; \
926 } \ 1194 } \
927 /* debug display ... show all symbols and some extra info */ \ 1195 scanelf_match_symname(elf, found_sym, \
928 if (*ret == '*') { \ 1196 &ret, &ret_len, symname, \
929 printf("%s(%s) %5lX %15s %s\n", \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
930 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
931 elf->base_filename, \ 1199 EGET(sym->st_shndx), \
932 (unsigned long)sym->st_size, \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
933 get_elfstttype(sym->st_info), \ 1201 EGET(sym->st_size)); \
934 symname); \
935 *found_sym = 1; \
936 } else { \
937 /* allow the user to specify a comma delimited list of symbols to search for */ \
938 char *this_sym, *this_sym_ver, *next_sym; \
939 this_sym = ret; \
940 this_sym_ver = versioned_symname; \
941 do { \
942 next_sym = strchr(this_sym, ','); \
943 if (next_sym == NULL) \
944 next_sym = this_sym + strlen(this_sym); \
945 /* do we want a defined symbol ? */ \
946 if (*this_sym == '+') { \
947 if (sym->st_shndx == SHN_UNDEF) \
948 goto skip_this_sym##B; \
949 ++this_sym; \
950 ++this_sym_ver; \
951 /* do we want an undefined symbol ? */ \
952 } else if (*this_sym == '-') { \
953 if (sym->st_shndx != SHN_UNDEF) \
954 goto skip_this_sym##B; \
955 ++this_sym; \
956 ++this_sym_ver; \
957 } \
958 /* ok, lets compare the name now */ \
959 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
960 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
961 if (be_semi_verbose) { \
962 char buf[126]; \
963 snprintf(buf, sizeof(buf), "%lX %s %s", \
964 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
965 ret = buf; \
966 } else \
967 ret = this_sym; \
968 (*found_sym)++; \
969 goto break_out; \
970 } \
971 skip_this_sym##B: this_sym = next_sym + 1; \
972 } while (*next_sym != '\0'); \
973 } \
974 } \ 1202 } \
975 ++sym; \ 1203 ++sym; \
976 } } 1204 } }
977 FIND_SYM(32) 1205 FIND_SYM(32)
978 FIND_SYM(64) 1206 FIND_SYM(64)
984 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
985 return ret; 1213 return ret;
986 if (be_quiet) 1214 if (be_quiet)
987 return NULL; 1215 return NULL;
988 else 1216 else
989 return (char *)" - "; 1217 return " - ";
990} 1218}
991 1219
992
993static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
994{ 1221{
995 if (!find_section) 1222 if (!find_section)
996 return NULL; 1223 return NULL;
997 1224
998#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
999 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1000 int invert; \ 1228 int invert; \
1229 const char *section_name; \
1001 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1002 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
1003 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1004 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)) \
1005 *found_section = 1; \ 1241 *found_section = 1; \
1006 } 1242 }
1007 FIND_SECTION(32) 1243 FIND_SECTION(32)
1008 FIND_SECTION(64) 1244 FIND_SECTION(64)
1009 1245
1014 return find_section; 1250 return find_section;
1015 1251
1016 if (be_quiet) 1252 if (be_quiet)
1017 return NULL; 1253 return NULL;
1018 else 1254 else
1019 return (char *)" - "; 1255 return " - ";
1020} 1256}
1021 1257
1022/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1023#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1024static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1025{ 1261{
1026 unsigned long i; 1262 unsigned long i;
1027 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1028 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
1042 printf("%s: scanning file\n", elf->filename); 1278 printf("%s: scanning file\n", elf->filename);
1043 1279
1044 /* init output buffer */ 1280 /* init output buffer */
1045 if (!out_buffer) { 1281 if (!out_buffer) {
1046 out_len = sizeof(char) * 80; 1282 out_len = sizeof(char) * 80;
1047 out_buffer = (char*)xmalloc(out_len); 1283 out_buffer = xmalloc(out_len);
1048 } 1284 }
1049 *out_buffer = '\0'; 1285 *out_buffer = '\0';
1050 1286
1051 /* show the header */ 1287 /* show the header */
1052 if (!be_quiet && show_banner) { 1288 if (!be_quiet && show_banner) {
1063 case 'o': prints(" TYPE "); break; 1299 case 'o': prints(" TYPE "); break;
1064 case 'x': prints(" PAX "); break; 1300 case 'x': prints(" PAX "); break;
1065 case 'e': prints("STK/REL/PTL "); break; 1301 case 'e': prints("STK/REL/PTL "); break;
1066 case 't': prints("TEXTREL "); break; 1302 case 't': prints("TEXTREL "); break;
1067 case 'r': prints("RPATH "); break; 1303 case 'r': prints("RPATH "); break;
1304 case 'M': prints("CLASS "); break;
1068 case 'n': prints("NEEDED "); break; 1305 case 'n': prints("NEEDED "); break;
1069 case 'i': prints("INTERP "); break; 1306 case 'i': prints("INTERP "); break;
1070 case 'b': prints("BIND "); break; 1307 case 'b': prints("BIND "); break;
1308 case 'Z': prints("SIZE "); break;
1071 case 'S': prints("SONAME "); break; 1309 case 'S': prints("SONAME "); break;
1072 case 's': prints("SYM "); break; 1310 case 's': prints("SYM "); break;
1073 case 'N': prints("LIB "); break; 1311 case 'N': prints("LIB "); break;
1074 case 'T': prints("TEXTRELS "); break; 1312 case 'T': prints("TEXTRELS "); break;
1075 case 'k': prints("SECTION "); break; 1313 case 'k': prints("SECTION "); break;
1076 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;
1077 default: warnf("'%c' has no title ?", out_format[i]); 1319 default: warnf("'%c' has no title ?", out_format[i]);
1078 } 1320 }
1079 } 1321 }
1080 if (!found_file) prints("FILE "); 1322 if (!found_file) prints("FILE ");
1081 prints("\n"); 1323 prints("\n");
1085 1327
1086 /* dump all the good stuff */ 1328 /* dump all the good stuff */
1087 for (i = 0; out_format[i]; ++i) { 1329 for (i = 0; out_format[i]; ++i) {
1088 const char *out; 1330 const char *out;
1089 const char *tmp; 1331 const char *tmp;
1090 1332 static char ubuf[sizeof(unsigned long)*2];
1091 if (!IS_MODIFIER(out_format[i])) { 1333 if (!IS_MODIFIER(out_format[i])) {
1092 xchrcat(&out_buffer, out_format[i], &out_len); 1334 xchrcat(&out_buffer, out_format[i], &out_len);
1093 continue; 1335 continue;
1094 } 1336 }
1095 1337
1131 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1373 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1132 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;
1133 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1134 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;
1135 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;
1136 case 'n': 1381 case 'n':
1137 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;
1138 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1139 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1140 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1141 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1386 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1142 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1387 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1143 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;;
1144 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1145 } 1393 }
1146 if (out) { 1394 if (out)
1147 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1148 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1149 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1150 else
1151 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1152 }
1153 } 1396 }
1154 1397
1155#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1156 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1157 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1189 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1190 goto label_done; 1433 goto label_done;
1191 break; 1434 break;
1192 default: break; 1435 default: break;
1193 } 1436 }
1194 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1195 char sbuf[126]; 1438 char sbuf[126];
1196 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1197 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1198 char *p; 1441 char *p;
1199 while((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1200 *p = 0; 1443 *p = 0;
1201 if (etype_lookup(p+1) == get_etype(elf)) 1444 if (etype_lookup(p+1) == get_etype(elf))
1202 goto label_ret; 1445 goto label_ret;
1203 } 1446 }
1204 } 1447 }
1224 1467
1225 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1226 if (ar == NULL) 1469 if (ar == NULL)
1227 return 1; 1470 return 1;
1228 1471
1229 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);
1230 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");
1231 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);
1232 if (elf) { 1478 if (elf) {
1233 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1234 unreadelf(elf); 1480 unreadelf(elf);
1235 } 1481 }
1236 } 1482 }
1255 if (!S_ISREG(st->st_mode)) { 1501 if (!S_ISREG(st->st_mode)) {
1256 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1502 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1257 return 1; 1503 return 1;
1258 } 1504 }
1259 1505
1506 if (match_perms) {
1507 if ((st->st_mode | match_perms) != st->st_mode)
1508 return 1;
1509 }
1260 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1510 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1261 return 1; 1511 return 1;
1262 1512
1263 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives) 1513 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1264 /* 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 */
1265 scanelf_archive(filename, fd, st->st_size); 1515 scanelf_archive(filename, fd, st->st_size);
1266 1516
1267 close(fd); 1517 close(fd);
1268 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;
1269} 1529}
1270 1530
1271/* 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 */
1272static int scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1273{ 1533{
1274 register DIR *dir; 1534 register DIR *dir;
1275 register struct dirent *dentry; 1535 register struct dirent *dentry;
1276 struct stat st_top, st; 1536 struct stat st_top, st;
1277 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1278 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1279 int ret = 0; 1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1280 1543
1281 /* make sure path exists */ 1544 /* make sure path exists */
1282 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1283 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1284 return 1; 1547 return 1;
1348static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1349{ 1612{
1350 FILE *fp = NULL; 1613 FILE *fp = NULL;
1351 char *p; 1614 char *p;
1352 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1353 1617
1354 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1355 return i;
1356 1619
1357 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1358 return i; 1621 return i;
1359 1622
1360 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1361 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1362 *p = 0; 1625 *p = 0;
1363 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1364 *p = 0; 1627 *p = 0;
1365#ifdef __linux__ 1628
1366 // recursive includes of the same file will make this segfault. 1629 /* recursive includes of the same file will make this segfault. */
1367 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1368 glob64_t gl; 1631 glob_t gl;
1369 size_t x; 1632 size_t x;
1370 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1371 1634
1372 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1373 1638
1374 if (path[8] != '/') 1639 if (path[8] != '/')
1375 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1376 else 1641 else
1377 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1378 1643
1379 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1380 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1381 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1382 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1383 continue; 1648 continue;
1384 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1385 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1386 globfree64(&gl);
1387 return i;
1388 }
1389 } 1650 }
1390 globfree64 (&gl); 1651 globfree(&gl);
1391 continue; 1652 continue;
1392 } 1653 }
1393 } 1654 }
1394#endif 1655
1395 if (*path != '/') 1656 if (*path != '/')
1396 continue; 1657 continue;
1397 1658
1398 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1399
1400 if (i + 1 == ARRAY_SIZE(ldpaths))
1401 break;
1402 } 1660 }
1403 ldpaths[i] = NULL;
1404 1661
1405 fclose(fp); 1662 fclose(fp);
1406 return i; 1663 return i;
1407} 1664}
1408 1665
1409#elif defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1410 1667
1411static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1412{ 1669{
1413 FILE *fp = NULL; 1670 FILE *fp = NULL;
1414 char *b = NULL, *p; 1671 char *b = NULL, *p;
1415 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1416 1674
1417 if (i + 1 == ARRAY_SIZE(ldpaths)) 1675 fname = maybe_add_root(fname, _fname);
1418 return i;
1419 1676
1420 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1421 return i; 1678 return i;
1422 1679
1423 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1426 { 1683 {
1427 fclose(fp); 1684 fclose(fp);
1428 return i; 1685 return i;
1429 } 1686 }
1430 1687
1431 b = (char*)malloc(hdr.dirlistlen+1); 1688 b = xmalloc(hdr.dirlistlen + 1);
1432 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) { 1689 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1433 fclose(fp); 1690 fclose(fp);
1434 free(b); 1691 free(b);
1435 return i; 1692 return i;
1436 } 1693 }
1437 1694
1438 while ((p = strsep(&b, ":"))) { 1695 while ((p = strsep(&b, ":"))) {
1439 if (*p == '\0') continue; 1696 if (*p == '\0')
1440 ldpaths[i++] = xstrdup(p); 1697 continue;
1441 1698 xarraypush(ldpaths, p, strlen(p));
1442 if (i + 1 == ARRAY_SIZE(ldpaths))
1443 break;
1444 } 1699 }
1445 ldpaths[i] = NULL;
1446 1700
1447 free(b); 1701 free(b);
1448 fclose(fp); 1702 fclose(fp);
1449 return i; 1703 return i;
1450} 1704}
1451 1705
1452#else 1706#else
1453 1707#ifdef __ELF__
1454#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1709#endif
1455static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1456{ 1711{
1457 memset(ldpaths, 0x00, sizeof(ldpaths)); 1712 return 0;
1458} 1713}
1459
1460#endif 1714#endif
1461 1715
1462/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1463static void scanelf_ldpath() 1717static void scanelf_ldpath(void)
1464{ 1718{
1465 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1466 int i = 0; 1722 int i = 0;
1467 1723
1468 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1469 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1470 1726
1471 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1472 1728
1473 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1474 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1475 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1476 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1477 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1478 ++i; 1734 ++i;
1479 } 1735 }
1480 1736
1481 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1482 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1483 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1739 if (!scan_ull) scanelf_dir("/usr/local/lib");
1484} 1740}
1485 1741
1486/* scan env PATH for paths */ 1742/* scan env PATH for paths */
1487static void scanelf_envpath() 1743static void scanelf_envpath(void)
1488{ 1744{
1489 char *path, *p; 1745 char *path, *p;
1490 1746
1491 path = getenv("PATH"); 1747 path = getenv("PATH");
1492 if (!path) 1748 if (!path)
1499 } 1755 }
1500 1756
1501 free(path); 1757 free(path);
1502} 1758}
1503 1759
1504/* usage / invocation handling functions */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1505#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"
1506#define a_argument required_argument 1762#define a_argument required_argument
1507static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1508 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1509 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1510 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1511 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1512 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1513 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1514 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1527 {"lib", a_argument, NULL, 'N'}, 1784 {"lib", a_argument, NULL, 'N'},
1528 {"gmatch", no_argument, NULL, 'g'}, 1785 {"gmatch", no_argument, NULL, 'g'},
1529 {"textrels", no_argument, NULL, 'T'}, 1786 {"textrels", no_argument, NULL, 'T'},
1530 {"etype", a_argument, NULL, 'E'}, 1787 {"etype", a_argument, NULL, 'E'},
1531 {"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'},
1532 {"all", no_argument, NULL, 'a'}, 1794 {"all", no_argument, NULL, 'a'},
1533 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1534 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1535 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1536 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1537 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1538 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1539 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1540 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1541 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1542}; 1805};
1543 1806
1544static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1545 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1546 "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)",
1547 "Scan directories recursively", 1811 "Scan directories recursively",
1548 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1549 "Don't scan symlinks", 1813 "Don't scan symlinks",
1550 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1551 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1560 "Print BIND information", 1824 "Print BIND information",
1561 "Print SONAME information", 1825 "Print SONAME information",
1562 "Find a specified symbol", 1826 "Find a specified symbol",
1563 "Find a specified section", 1827 "Find a specified section",
1564 "Find a specified library", 1828 "Find a specified library",
1565 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1566 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1567 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1568 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1569 "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",
1570 "Only output 'bad' things", 1839 "Only output 'bad' things",
1571 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1572 "Use specified format for output", 1841 "Use specified format for output",
1573 "Read input stream from a filename", 1842 "Read input stream from a filename",
1574 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1575 "Don't display the header", 1845 "Don't display the header",
1576 "Print this help and exit", 1846 "Print this help and exit",
1577 "Print version and exit", 1847 "Print version and exit",
1578 NULL 1848 NULL
1579}; 1849};
1587 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1588 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1589 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1590 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 1860 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1591 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]);
1592 else 1865 else
1593 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1594 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1595 1868
1596 if (status != EXIT_SUCCESS) 1869 puts("\nFor more information, see the scanelf(1) manpage");
1597 exit(status);
1598
1599 puts("\nThe format modifiers for the -F option are:");
1600 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1601 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1602 puts(" i INTERP \tb BIND \ts symbol");
1603 puts(" N library \to Type \tT TEXTRELs");
1604 puts(" S SONAME \tk section \ta arch");
1605 puts(" p filename (with search path removed)");
1606 puts(" f filename (short name/basename)");
1607 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1608
1609 puts("\nELF Etypes:");
1610 print_etypes(stdout);
1611
1612 exit(status); 1870 exit(status);
1613} 1871}
1614 1872
1615/* parse command line arguments and preform needed actions */ 1873/* parse command line arguments and preform needed actions */
1616#define do_pax_state(option, flag) \ 1874#define do_pax_state(option, flag) \
1641 case 'f': 1899 case 'f':
1642 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");
1643 from_file = optarg; 1901 from_file = optarg;
1644 break; 1902 break;
1645 case 'E': 1903 case 'E':
1646 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1647 break; 1905 break;
1648 case 'M': 1906 case 'M':
1649 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;
1650 break; 1918 break;
1651 case 'o': { 1919 case 'o': {
1652 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1653 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1654 break; 1922 break;
1655 } 1923 }
1656 case 'k': 1924 case 'k':
1657 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1658 find_section = optarg;
1659 break; 1926 break;
1660 case 's': { 1927 case 's': {
1661 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");
1662 find_sym = optarg; 1929 find_sym = optarg;
1663 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1664 sprintf(versioned_symname, "%s@", find_sym);
1665 break; 1930 break;
1666 } 1931 }
1667 case 'N': { 1932 case 'N':
1668 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1669 find_lib = optarg;
1670 break; 1934 break;
1671 }
1672
1673 case 'F': { 1935 case 'F': {
1674 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");
1675 out_format = optarg; 1937 out_format = optarg;
1676 break; 1938 break;
1677 } 1939 }
1678 case 'z': { 1940 case 'z': {
1679 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1941 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1680 size_t x; 1942 size_t x;
1681 1943
1682 for (x = 0 ; x < strlen(optarg); x++) { 1944 for (x = 0; x < strlen(optarg); x++) {
1683 switch(optarg[x]) { 1945 switch (optarg[x]) {
1684 case 'p': 1946 case 'p':
1685 case 'P': 1947 case 'P':
1686 do_pax_state(optarg[x], PAGEEXEC); 1948 do_pax_state(optarg[x], PAGEEXEC);
1687 break; 1949 break;
1688 case 's': 1950 case 's':
1716 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1978 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1717 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1979 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1718 setpax = flags; 1980 setpax = flags;
1719 break; 1981 break;
1720 } 1982 }
1983 case 'Z': show_size = 1; break;
1721 case 'g': gmatch = 1; break; 1984 case 'g': g_match = 1; break;
1722 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1723 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1724 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1725 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1726 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1727 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1728 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1729 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1737 case 'b': show_bind = 1; break; 2001 case 'b': show_bind = 1; break;
1738 case 'S': show_soname = 1; break; 2002 case 'S': show_soname = 1; break;
1739 case 'T': show_textrels = 1; break; 2003 case 'T': show_textrels = 1; break;
1740 case 'q': be_quiet = 1; break; 2004 case 'q': be_quiet = 1; break;
1741 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1742 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;
1743 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;
1744 case ':': 2013 case ':':
1745 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1746 case '?': 2015 case '?':
1747 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1748 default: 2017 default:
1749 err("Unhandled option '%c'; please report this", i); 2018 err("Unhandled option '%c'; please report this", i);
1750 } 2019 }
1751 } 2020 }
1752 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);
1753 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1754 if (out_format) { 2031 if (out_format) {
1755 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1756 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1757 show_textrels = 0; 2034 show_textrels = show_perms = show_endian = show_size = \
2035 show_osabi = show_eabi = 0;
1758 for (i = 0; out_format[i]; ++i) { 2036 for (i = 0; out_format[i]; ++i) {
1759 if (!IS_MODIFIER(out_format[i])) continue; 2037 if (!IS_MODIFIER(out_format[i])) continue;
1760 2038
1761 switch (out_format[++i]) { 2039 switch (out_format[++i]) {
1762 case '+': break; 2040 case '+': break;
1768 case 'k': break; 2046 case 'k': break;
1769 case 's': break; 2047 case 's': break;
1770 case 'N': break; 2048 case 'N': break;
1771 case 'o': break; 2049 case 'o': break;
1772 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;
1773 case 'x': show_pax = 1; break; 2057 case 'x': show_pax = 1; break;
1774 case 'e': show_phdr = 1; break; 2058 case 'e': show_phdr = 1; break;
1775 case 't': show_textrel = 1; break; 2059 case 't': show_textrel = 1; break;
1776 case 'r': show_rpath = 1; break; 2060 case 'r': show_rpath = 1; break;
1777 case 'n': show_needed = 1; break; 2061 case 'n': show_needed = 1; break;
1786 } 2070 }
1787 2071
1788 /* construct our default format */ 2072 /* construct our default format */
1789 } else { 2073 } else {
1790 size_t fmt_len = 30; 2074 size_t fmt_len = 30;
1791 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2075 out_format = xmalloc(sizeof(char) * fmt_len);
2076 *out_format = '\0';
1792 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2077 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1793 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);
1794 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2084 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1795 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2085 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1796 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2086 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1797 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2087 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1798 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2088 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1823 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1824 ret = scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1825 } 2115 }
1826 2116
1827 /* clean up */ 2117 /* clean up */
1828 free(versioned_symname);
1829 for (i = 0; ldpaths[i]; ++i)
1830 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1831 2123
1832 if (ldcache != 0) 2124 if (ldcache != 0)
1833 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1834 return ret; 2126 return ret;
1835} 2127}
1865 2157
1866 /* 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
1867 * the envvals array of strings */ 2159 * the envvals array of strings */
1868 return envvals; 2160 return envvals;
1869} 2161}
2162
1870static void parseenv() 2163static void parseenv(void)
1871{ 2164{
2165 color_init(false);
1872 qa_textrels = get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
1873 qa_execstack = get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
1874 qa_wx_load = get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
1875} 2169}
1876 2170
1877#ifdef __PAX_UTILS_CLEANUP 2171#ifdef __PAX_UTILS_CLEANUP
1878static void cleanup() 2172static void cleanup(void)
1879{ 2173{
1880 free(out_format); 2174 free(out_format);
1881 free(qa_textrels); 2175 free(qa_textrels);
1882 free(qa_execstack); 2176 free(qa_execstack);
1883 free(qa_wx_load); 2177 free(qa_wx_load);
1884} 2178}
1885#endif 2179#endif
1886
1887 2180
1888int main(int argc, char *argv[]) 2181int main(int argc, char *argv[])
1889{ 2182{
1890 int ret; 2183 int ret;
1891 if (argc < 2) 2184 if (argc < 2)
1900 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD"); 2193 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1901#endif 2194#endif
1902 return ret; 2195 return ret;
1903} 2196}
1904 2197
1905
1906
1907/* utility funcs */
1908static char *xstrdup(const char *s)
1909{
1910 char *ret = strdup(s);
1911 if (!ret) err("Could not strdup(): %s", strerror(errno));
1912 return ret;
1913}
1914static void *xmalloc(size_t size)
1915{
1916 void *ret = malloc(size);
1917 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1918 return ret;
1919}
1920static void *xrealloc(void *ptr, size_t size)
1921{
1922 void *ret = realloc(ptr, size);
1923 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
1924 return ret;
1925}
1926static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1927{
1928 size_t new_len;
1929
1930 new_len = strlen(*dst) + strlen(src);
1931 if (*curr_len <= new_len) {
1932 *curr_len = new_len + (*curr_len / 2);
1933 *dst = realloc(*dst, *curr_len);
1934 if (!*dst)
1935 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1936 }
1937
1938 if (n)
1939 strncat(*dst, src, n);
1940 else
1941 strcat(*dst, src);
1942}
1943static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1944{
1945 static char my_app[2];
1946 my_app[0] = append;
1947 my_app[1] = '\0';
1948 xstrcat(dst, my_app, curr_len);
1949}
1950
1951/* Match filename against entries in matchlist, return TRUE 2198/* Match filename against entries in matchlist, return TRUE
1952 * if the file is listed */ 2199 * if the file is listed */
1953static int file_matches_list(const char *filename, char **matchlist) 2200static int file_matches_list(const char *filename, char **matchlist)
1954{ 2201{
1955 char **file; 2202 char **file;

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