/[gentoo-projects]/pax-utils/scanelf.c
Gentoo

Diff of /pax-utils/scanelf.c

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 1.172 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 1.172 2007/01/09 23:04:12 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 1.172 2007/01/09 23:04:12 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
78int has_objdump = 0; 70static int has_objdump = 0;
79 71
72/* find the path to a file by name */
80static char *which(const char *fname) 73static char *which(const char *fname)
81{ 74{
82 static char fullpath[BUFSIZ]; 75 static char fullpath[__PAX_UTILS_PATH_MAX];
83 char *path, *p; 76 char *path, *p;
84 77
85 path = getenv("PATH"); 78 path = getenv("PATH");
86 if (!path) 79 if (!path)
87 return NULL; 80 return NULL;
88 81
89 path = xstrdup(path); 82 path = xstrdup(path);
90 while ((p = strrchr(path, ':')) != NULL) { 83 while ((p = strrchr(path, ':')) != NULL) {
91 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname); 84 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
92 *p = 0; 85 *p = 0;
93 if (access(fullpath, R_OK) != (-1)) { 86 if (access(fullpath, R_OK) != -1) {
94 free(path); 87 free(path);
95 return (char *) fullpath; 88 return fullpath;
96 } 89 }
97 } 90 }
98 free(path); 91 free(path);
99 return NULL; 92 return NULL;
100} 93}
101 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}
119
102/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
103static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
104{ 122{
105 /* 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
106#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
107 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
108 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
109 /* debug sections */ \
110 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
111 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
112 /* runtime sections */ \
113 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
114 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
115 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
116 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
117 } else { \ 138 } else \
118 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
119 } \
120 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
121 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
122 } else { \ 144 } else \
123 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
124 } \
125 } 146 }
126 GET_SYMTABS(32) 147 GET_SYMTABS(32)
127 GET_SYMTABS(64) 148 GET_SYMTABS(64)
128} 149}
129 150
158 } \ 179 } \
159 } 180 }
160 SHOW_PAX(32) 181 SHOW_PAX(32)
161 SHOW_PAX(64) 182 SHOW_PAX(64)
162 } 183 }
163
164 184
165 if (fix_elf && setpax) { 185 if (fix_elf && setpax) {
166 /* set the chpax settings */ 186 /* set the chpax settings */
167 if (elf->elf_class == ELFCLASS32) { 187 if (elf->elf_class == ELFCLASS32) {
168 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)
227 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 247 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
228 found = found_relro; \ 248 found = found_relro; \
229 offset = 4; \ 249 offset = 4; \
230 check_flags = PF_X; \ 250 check_flags = PF_X; \
231 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 251 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
232 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) \
233 if (multi_load++ > max_pt_load) \ 253 if (multi_load++ > max_pt_load) \
234 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); \
235 if (file_matches_list(elf->filename, qa_wx_load)) \ 255 if (file_matches_list(elf->filename, qa_wx_load)) \
236 continue; \ 256 continue; \
237 found = found_load; \ 257 found = found_load; \
254 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
255 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
256 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
257 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
258 char *str; \ 278 char *str; \
259 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
260 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
261 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
262 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
263 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
264 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
295 return NULL; 315 return NULL;
296 else 316 else
297 return ret; 317 return ret;
298} 318}
299 319
320/*
321 * See if this ELF contains a DT_TEXTREL tag in any of its
322 * PT_DYNAMIC sections.
323 */
300static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 324static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
301{ 325{
302 static const char *ret = "TEXTREL"; 326 static const char *ret = "TEXTREL";
303 unsigned long i; 327 unsigned long i;
304 328
312 Elf ## B ## _Dyn *dyn; \ 336 Elf ## B ## _Dyn *dyn; \
313 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 337 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
314 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 338 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
315 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
316 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
317 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; \
318 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
319 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
320 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
321 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
322 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)*/ \
323 *found_textrel = 1; \ 347 *found_textrel = 1; \
324 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
325 return (be_wewy_wewy_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
334 if (be_quiet || be_wewy_wewy_quiet) 358 if (be_quiet || be_wewy_wewy_quiet)
335 return NULL; 359 return NULL;
336 else 360 else
337 return " - "; 361 return " - ";
338} 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 */
339static 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)
340{ 370{
341 unsigned long s, r, rmax; 371 unsigned long s, r, rmax;
342 void *symtab_void, *strtab_void, *text_void; 372 void *symtab_void, *strtab_void, *text_void;
343 373
364 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
365 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
366 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
367 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
368 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
369 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
370 rela = NULL; \ 400 rela = NULL; \
371 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
372 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
373 rel = NULL; \ 403 rel = NULL; \
374 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
375 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
376 } else \ 406 } else \
377 continue; \ 407 continue; \
378 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
379 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
394 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
395 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
396 } else \ 426 } else \
397 *found_textrels = 1; \ 427 *found_textrels = 1; \
398 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
399 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
400 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
401 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
402 continue; \ 432 continue; \
403 } \ 433 } \
404 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
405 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
408 sym = NULL; \ 438 sym = NULL; \
409 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
410 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
411 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
412 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
413 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)); \
414 else \ 444 else \
415 printf("(memory/data?)"); \ 445 printf("(memory/data?)"); \
416 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
417 /* 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 */ \
418 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
419 func = NULL; \ 449 func = NULL; \
420 offset_tmp = 0; \ 450 offset_tmp = 0; \
421 while (sym_max--) { \ 451 while (sym_max--) { \
422 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) { \
423 func = sym; \ 453 func = sym; \
434 printf("%s", func_name); \ 464 printf("%s", func_name); \
435 } else \ 465 } else \
436 printf("(optimized out)"); \ 466 printf("(optimized out)"); \
437 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 467 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
438 if (be_verbose && has_objdump) { \ 468 if (be_verbose && has_objdump) { \
469 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
439 char *sysbuf; \ 470 char *sysbuf; \
440 size_t syslen; \ 471 size_t syslen; \
472 int sysret; \
441 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"; \
442 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \ 474 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
443 sysbuf = xmalloc(syslen); \ 475 sysbuf = xmalloc(syslen); \
444 if (sysbuf) { \
445 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
446 if (end_addr < r_offset) \ 476 if (end_addr < r_offset) \
447 /* not uncommon when things are optimized out */ \ 477 /* not uncommon when things are optimized out */ \
448 end_addr = r_offset + 0x100; \ 478 end_addr = r_offset + 0x100; \
449 snprintf(sysbuf, syslen, sysfmt, \ 479 snprintf(sysbuf, syslen, sysfmt, \
450 (unsigned long)offset_tmp, \ 480 (unsigned long)offset_tmp, \
451 (unsigned long)end_addr, \ 481 (unsigned long)end_addr, \
452 elf->filename, \ 482 elf->filename, \
453 (unsigned long)r_offset); \ 483 (unsigned long)r_offset); \
454 fflush(stdout); \ 484 fflush(stdout); \
455 system(sysbuf); \ 485 sysret = system(sysbuf); \
456 fflush(stdout); \ 486 fflush(stdout); \
457 free(sysbuf); \ 487 free(sysbuf); \
458 } \
459 } \ 488 } \
460 } \ 489 } \
461 } } 490 } }
462 SHOW_TEXTRELS(32) 491 SHOW_TEXTRELS(32)
463 SHOW_TEXTRELS(64) 492 SHOW_TEXTRELS(64)
466 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);
467 496
468 return NULL; 497 return NULL;
469} 498}
470 499
471static void rpath_security_checks(elfobj *, char *, const char *);
472static 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)
473{ 501{
474 struct stat st; 502 struct stat st;
475 switch (*item) { 503 switch (*item) {
476 case '/': break; 504 case '/': break;
483 break; 511 break;
484 case '$': 512 case '$':
485 if (fstat(elf->fd, &st) != -1) 513 if (fstat(elf->fd, &st) != -1)
486 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 514 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
487 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",
488 dt_type, item, elf->filename, st.st_mode & 07777); 516 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
489 break; 517 break;
490 default: 518 default:
491 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);
492 break; 520 break;
493 } 521 }
494} 522}
495static 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)
496{ 524{
497 unsigned long i, s; 525 unsigned long i;
498 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
499 void *strtbl_void; 527 void *strtbl_void;
500 528
501 if (!show_rpath) return; 529 if (!show_rpath) return;
502 530
513 Elf ## B ## _Off offset; \ 541 Elf ## B ## _Off offset; \
514 Elf ## B ## _Xword word; \ 542 Elf ## B ## _Xword word; \
515 /* Scan all the program headers */ \ 543 /* Scan all the program headers */ \
516 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 544 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
517 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
518 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; \
519 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
520 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
521 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
522 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
523 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
524 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
525 r = &rpath; \ 553 r = &rpath; \
526 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
527 r = &runpath; \ 555 r = &runpath; \
531 } \ 559 } \
532 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
533 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
534 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
535 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
536 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
537 /* 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 */ \
538 if (fix_elf) \ 566 if (fix_elf) \
539 offset = strlen(*r); \ 567 offset = strlen(*r); \
540 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
541 if (be_quiet) { \ 569 if (be_quiet) { \
547 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
548 while (start) { \ 576 while (start) { \
549 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
550 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
551 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
552 if (use_ldcache) \ 580 if (use_ldcache) { \
553 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
554 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
555 *r = end; \ 585 *r = end; \
556 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
557 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
558 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
559 (*r)++; \ 589 (*r)++; \
560 break; \ 590 break; \
561 } \ 591 } \
592 } \
562 if (!*r || !end) \ 593 if (!*r || !end) \
563 break; \ 594 break; \
564 else \ 595 else \
565 start = start + len + 1; \ 596 start = start + len + 1; \
566 } \ 597 } \
651#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
652#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
653#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
654#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
655 686
656static char *lookup_cache_lib(elfobj *, char *);
657
658#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
659 688
660static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
661{ 690{
662 int fd = 0; 691 int fd;
663 char *strs; 692 char *strs;
664 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
665 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
666 struct stat st; 695 struct stat st;
667 696
668 typedef struct { 697 typedef struct {
669 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
670 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
680 libentry_t *libent; 709 libentry_t *libent;
681 710
682 if (fname == NULL) 711 if (fname == NULL)
683 return NULL; 712 return NULL;
684 713
685 if (ldcache == 0) { 714 if (ldcache == NULL) {
686 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)
687 return NULL; 720 return NULL;
688 721
689 /* 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 */
690 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
691 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
692
693 close(fd); 725 close(fd);
694 726
695 if (ldcache == (caddr_t)-1) { 727 if (ldcache == MAP_FAILED) {
696 ldcache = 0; 728 ldcache = NULL;
697 return NULL; 729 return NULL;
698 } 730 }
699 731
700 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;
701 return NULL; 737 return NULL;
702 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
703 return NULL;
704 } 738 }
739 } else
740 header = ldcache;
705 741
706 header = (header_t *) ldcache;
707 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
708 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
709 744
710 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
711 /* 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
712 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
713 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
714 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
715 continue; 751 continue;
716 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
717 continue; 753 continue;
718 754
719 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
720 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
721 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
722 } 761 }
762
723 return buf; 763 return buf;
724} 764}
765
725#elif defined(__NetBSD__) 766#elif defined(__NetBSD__)
726static char *lookup_cache_lib(elfobj *elf, char *fname) 767static char *lookup_cache_lib(elfobj *elf, char *fname)
727{ 768{
728 static char buf[__PAX_UTILS_PATH_MAX] = ""; 769 static char buf[__PAX_UTILS_PATH_MAX] = "";
729 static struct stat st; 770 static struct stat st;
730 771 size_t n;
731 char **ldpath; 772 char *ldpath;
732 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 773
774 array_for_each(ldpath, n, ldpath) {
733 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))
734 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 */
735 777
736 if (stat(buf, &st) != 0) 778 if (stat(buf, &st) != 0)
737 continue; /* if the lib doesn't exist in *ldpath, look further */ 779 continue; /* if the lib doesn't exist in *ldpath, look further */
738 780
746 788
747 /* not found in any path */ 789 /* not found in any path */
748 return NULL; 790 return NULL;
749} 791}
750#else 792#else
793#ifdef __ELF__
751#warning Cache support not implemented for your target 794#warning Cache support not implemented for your target
795#endif
752static char *lookup_cache_lib(elfobj *elf, char *fname) 796static char *lookup_cache_lib(elfobj *elf, char *fname)
753{ 797{
754 return NULL; 798 return NULL;
755} 799}
756#endif 800#endif
760 unsigned long i; 804 unsigned long i;
761 char *needed; 805 char *needed;
762 void *strtbl_void; 806 void *strtbl_void;
763 char *p; 807 char *p;
764 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
765 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
766 815
767 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
768 817
769 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
770#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
772 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
773 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
774 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
775 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
776 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 */ \
777 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
778 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; \
779 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
780 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 */ \
781 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
782 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
783 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
784 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
785 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
786 ++dyn; \ 840 ++dyn; \
787 continue; \ 841 continue; \
788 } \ 842 } \
789 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
790 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
791 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
792 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
793 if (use_ldcache) \ 848 if (use_ldcache) \
794 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
795 needed = p; \ 850 needed = p; \
796 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
797 } \ 852 } \
798 *found_needed = 1; \ 853 *found_needed = 1; \
799 } else { \ 854 } else { \
800 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)) { \
801 *found_lib = 1; \ 864 *found_lib = 1; \
802 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
803 } \ 866 } \
804 } \ 867 } \
805 } \ 868 } \
806 ++dyn; \ 869 ++dyn; \
807 } \ 870 } \
848 Elf ## B ## _Dyn *dyn; \ 911 Elf ## B ## _Dyn *dyn; \
849 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 912 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
850 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 913 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
851 Elf ## B ## _Off offset; \ 914 Elf ## B ## _Off offset; \
852 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
853 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; \
854 dynamic = 1; \ 917 dynamic = 1; \
855 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
856 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
857 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
858 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
859 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
860 (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)) \
861 { \ 924 { \
862 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
875 /* 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 */
876 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))))) {
877 return NULL; 940 return NULL;
878 } else { 941 } else {
879 *found_bind = 1; 942 *found_bind = 1;
880 return (char *) (dynamic ? "LAZY" : "STATIC"); 943 return (char *)(dynamic ? "LAZY" : "STATIC");
881 } 944 }
882} 945}
883static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
884{ 947{
885 unsigned long i; 948 unsigned long i;
897 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 960 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
898 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 961 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
899 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 962 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
900 Elf ## B ## _Off offset; \ 963 Elf ## B ## _Off offset; \
901 /* only look for soname in shared objects */ \ 964 /* only look for soname in shared objects */ \
902 if (ehdr->e_type != ET_DYN) \ 965 if (EGET(ehdr->e_type) != ET_DYN) \
903 return NULL; \ 966 return NULL; \
904 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
905 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; \
906 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
907 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
908 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
909 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
910 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
911 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
912 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
913 ++dyn; \ 976 ++dyn; \
914 continue; \ 977 continue; \
915 } \ 978 } \
916 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
917 *found_soname = 1; \ 980 *found_soname = 1; \
918 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
919 } \ 982 } \
920 ++dyn; \ 983 ++dyn; \
921 } \ 984 } \
924 SHOW_SONAME(64) 987 SHOW_SONAME(64)
925 } 988 }
926 989
927 return NULL; 990 return NULL;
928} 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
929static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
930{ 1161{
931 unsigned long i; 1162 unsigned long i;
932 char *ret; 1163 char *ret;
933 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
934 1165
935 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
936 ret = find_sym; 1167 ret = NULL;
937 1168
938 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
939 1170
940 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
941#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
942 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
943 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
944 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
945 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)); \
946 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
947 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
948 if (cnt) \ 1180 if (cnt) \
949 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
950 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 } \
951 if (sym->st_name) { \ 1187 if (sym->st_name) { \
952 /* make sure the symbol name is in acceptable memory range */ \ 1188 /* make sure the symbol name is in acceptable memory range */ \
953 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
954 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
955 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
956 ++sym; \ 1192 ++sym; \
957 continue; \ 1193 continue; \
958 } \ 1194 } \
959 /* debug display ... show all symbols and some extra info */ \ 1195 scanelf_match_symname(elf, found_sym, \
960 if (*ret == '*') { \ 1196 &ret, &ret_len, symname, \
961 printf("%s(%s) %5lX %15s %s\n", \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
962 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
963 elf->base_filename, \ 1199 EGET(sym->st_shndx), \
964 (unsigned long)sym->st_size, \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
965 get_elfstttype(sym->st_info), \ 1201 EGET(sym->st_size)); \
966 symname); \
967 *found_sym = 1; \
968 } else { \
969 /* allow the user to specify a comma delimited list of symbols to search for */ \
970 char *this_sym, *this_sym_ver, *next_sym; \
971 this_sym = ret; \
972 this_sym_ver = versioned_symname; \
973 do { \
974 next_sym = strchr(this_sym, ','); \
975 if (next_sym == NULL) \
976 next_sym = this_sym + strlen(this_sym); \
977 /* do we want a defined symbol ? */ \
978 if (*this_sym == '+') { \
979 if (sym->st_shndx == SHN_UNDEF) \
980 goto skip_this_sym##B; \
981 ++this_sym; \
982 ++this_sym_ver; \
983 /* do we want an undefined symbol ? */ \
984 } else if (*this_sym == '-') { \
985 if (sym->st_shndx != SHN_UNDEF) \
986 goto skip_this_sym##B; \
987 ++this_sym; \
988 ++this_sym_ver; \
989 } \
990 /* ok, lets compare the name now */ \
991 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
992 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
993 if (be_semi_verbose) { \
994 char buf[126]; \
995 snprintf(buf, sizeof(buf), "%lX %s %s", \
996 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
997 ret = buf; \
998 } else \
999 ret = this_sym; \
1000 (*found_sym)++; \
1001 goto break_out; \
1002 } \
1003 skip_this_sym##B: this_sym = next_sym + 1; \
1004 } while (*next_sym != '\0'); \
1005 } \
1006 } \ 1202 } \
1007 ++sym; \ 1203 ++sym; \
1008 } } 1204 } }
1009 FIND_SYM(32) 1205 FIND_SYM(32)
1010 FIND_SYM(64) 1206 FIND_SYM(64)
1016 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
1017 return ret; 1213 return ret;
1018 if (be_quiet) 1214 if (be_quiet)
1019 return NULL; 1215 return NULL;
1020 else 1216 else
1021 return (char *)" - "; 1217 return " - ";
1022} 1218}
1023 1219
1024
1025static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1026{ 1221{
1027 if (!find_section) 1222 if (!find_section)
1028 return NULL; 1223 return NULL;
1029 1224
1030#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
1031 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1032 int invert; \ 1228 int invert; \
1229 const char *section_name; \
1033 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1034 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
1035 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1036 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)) \
1037 *found_section = 1; \ 1241 *found_section = 1; \
1038 } 1242 }
1039 FIND_SECTION(32) 1243 FIND_SECTION(32)
1040 FIND_SECTION(64) 1244 FIND_SECTION(64)
1041 1245
1046 return find_section; 1250 return find_section;
1047 1251
1048 if (be_quiet) 1252 if (be_quiet)
1049 return NULL; 1253 return NULL;
1050 else 1254 else
1051 return (char *)" - "; 1255 return " - ";
1052} 1256}
1053 1257
1054/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1055#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1056static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1057{ 1261{
1058 unsigned long i; 1262 unsigned long i;
1059 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1060 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
1074 printf("%s: scanning file\n", elf->filename); 1278 printf("%s: scanning file\n", elf->filename);
1075 1279
1076 /* init output buffer */ 1280 /* init output buffer */
1077 if (!out_buffer) { 1281 if (!out_buffer) {
1078 out_len = sizeof(char) * 80; 1282 out_len = sizeof(char) * 80;
1079 out_buffer = (char*)xmalloc(out_len); 1283 out_buffer = xmalloc(out_len);
1080 } 1284 }
1081 *out_buffer = '\0'; 1285 *out_buffer = '\0';
1082 1286
1083 /* show the header */ 1287 /* show the header */
1084 if (!be_quiet && show_banner) { 1288 if (!be_quiet && show_banner) {
1099 case 'r': prints("RPATH "); break; 1303 case 'r': prints("RPATH "); break;
1100 case 'M': prints("CLASS "); break; 1304 case 'M': prints("CLASS "); break;
1101 case 'n': prints("NEEDED "); break; 1305 case 'n': prints("NEEDED "); break;
1102 case 'i': prints("INTERP "); break; 1306 case 'i': prints("INTERP "); break;
1103 case 'b': prints("BIND "); break; 1307 case 'b': prints("BIND "); break;
1308 case 'Z': prints("SIZE "); break;
1104 case 'S': prints("SONAME "); break; 1309 case 'S': prints("SONAME "); break;
1105 case 's': prints("SYM "); break; 1310 case 's': prints("SYM "); break;
1106 case 'N': prints("LIB "); break; 1311 case 'N': prints("LIB "); break;
1107 case 'T': prints("TEXTRELS "); break; 1312 case 'T': prints("TEXTRELS "); break;
1108 case 'k': prints("SECTION "); break; 1313 case 'k': prints("SECTION "); break;
1109 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;
1110 default: warnf("'%c' has no title ?", out_format[i]); 1319 default: warnf("'%c' has no title ?", out_format[i]);
1111 } 1320 }
1112 } 1321 }
1113 if (!found_file) prints("FILE "); 1322 if (!found_file) prints("FILE ");
1114 prints("\n"); 1323 prints("\n");
1118 1327
1119 /* dump all the good stuff */ 1328 /* dump all the good stuff */
1120 for (i = 0; out_format[i]; ++i) { 1329 for (i = 0; out_format[i]; ++i) {
1121 const char *out; 1330 const char *out;
1122 const char *tmp; 1331 const char *tmp;
1123 1332 static char ubuf[sizeof(unsigned long)*2];
1124 if (!IS_MODIFIER(out_format[i])) { 1333 if (!IS_MODIFIER(out_format[i])) {
1125 xchrcat(&out_buffer, out_format[i], &out_len); 1334 xchrcat(&out_buffer, out_format[i], &out_len);
1126 continue; 1335 continue;
1127 } 1336 }
1128 1337
1165 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;
1166 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1167 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;
1168 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;
1169 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break; 1378 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1379 case 'D': out = get_endian(elf); break;
1380 case 'O': out = strfileperms(elf->filename); break;
1170 case 'n': 1381 case 'n':
1171 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;
1172 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1173 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1174 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1175 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1386 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1176 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1387 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1177 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;;
1178 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1179 } 1393 }
1180 if (out) { 1394 if (out)
1181 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1182 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1183 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1184 else
1185 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1186 }
1187 } 1396 }
1188 1397
1189#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1190 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1191 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1223 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1224 goto label_done; 1433 goto label_done;
1225 break; 1434 break;
1226 default: break; 1435 default: break;
1227 } 1436 }
1228 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1229 char sbuf[126]; 1438 char sbuf[126];
1230 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1231 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1232 char *p; 1441 char *p;
1233 while((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1234 *p = 0; 1443 *p = 0;
1235 if (etype_lookup(p+1) == get_etype(elf)) 1444 if (etype_lookup(p+1) == get_etype(elf))
1236 goto label_ret; 1445 goto label_ret;
1237 } 1446 }
1238 } 1447 }
1258 1467
1259 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1260 if (ar == NULL) 1469 if (ar == NULL)
1261 return 1; 1470 return 1;
1262 1471
1263 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);
1264 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");
1265 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);
1266 if (elf) { 1478 if (elf) {
1267 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1268 unreadelf(elf); 1480 unreadelf(elf);
1269 } 1481 }
1270 } 1482 }
1289 if (!S_ISREG(st->st_mode)) { 1501 if (!S_ISREG(st->st_mode)) {
1290 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1502 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1291 return 1; 1503 return 1;
1292 } 1504 }
1293 1505
1506 if (match_perms) {
1507 if ((st->st_mode | match_perms) != st->st_mode)
1508 return 1;
1509 }
1294 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1510 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1295 return 1; 1511 return 1;
1296 1512
1297 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives) 1513 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1298 /* 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 */
1299 scanelf_archive(filename, fd, st->st_size); 1515 scanelf_archive(filename, fd, st->st_size);
1300 1516
1301 close(fd); 1517 close(fd);
1302 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;
1303} 1529}
1304 1530
1305/* 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 */
1306static int scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1307{ 1533{
1308 register DIR *dir; 1534 register DIR *dir;
1309 register struct dirent *dentry; 1535 register struct dirent *dentry;
1310 struct stat st_top, st; 1536 struct stat st_top, st;
1311 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1312 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1313 int ret = 0; 1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1314 1543
1315 /* make sure path exists */ 1544 /* make sure path exists */
1316 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1317 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1318 return 1; 1547 return 1;
1382static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1383{ 1612{
1384 FILE *fp = NULL; 1613 FILE *fp = NULL;
1385 char *p; 1614 char *p;
1386 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1387 1617
1388 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1389 return i;
1390 1619
1391 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1392 return i; 1621 return i;
1393 1622
1394 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1395 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1396 *p = 0; 1625 *p = 0;
1397 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1398 *p = 0; 1627 *p = 0;
1399#ifdef __linux__ 1628
1400 // recursive includes of the same file will make this segfault. 1629 /* recursive includes of the same file will make this segfault. */
1401 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1402 glob64_t gl; 1631 glob_t gl;
1403 size_t x; 1632 size_t x;
1404 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1405 1634
1406 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1407 1638
1408 if (path[8] != '/') 1639 if (path[8] != '/')
1409 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1410 else 1641 else
1411 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1412 1643
1413 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1414 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1415 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1416 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1417 continue; 1648 continue;
1418 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1419 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1420 globfree64(&gl);
1421 return i;
1422 }
1423 } 1650 }
1424 globfree64 (&gl); 1651 globfree(&gl);
1425 continue; 1652 continue;
1426 } 1653 }
1427 } 1654 }
1428#endif 1655
1429 if (*path != '/') 1656 if (*path != '/')
1430 continue; 1657 continue;
1431 1658
1432 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1433
1434 if (i + 1 == ARRAY_SIZE(ldpaths))
1435 break;
1436 } 1660 }
1437 ldpaths[i] = NULL;
1438 1661
1439 fclose(fp); 1662 fclose(fp);
1440 return i; 1663 return i;
1441} 1664}
1442 1665
1443#elif defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1444 1667
1445static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1446{ 1669{
1447 FILE *fp = NULL; 1670 FILE *fp = NULL;
1448 char *b = NULL, *p; 1671 char *b = NULL, *p;
1449 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1450 1674
1451 if (i + 1 == ARRAY_SIZE(ldpaths)) 1675 fname = maybe_add_root(fname, _fname);
1452 return i;
1453 1676
1454 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1455 return i; 1678 return i;
1456 1679
1457 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1460 { 1683 {
1461 fclose(fp); 1684 fclose(fp);
1462 return i; 1685 return i;
1463 } 1686 }
1464 1687
1465 b = (char*)malloc(hdr.dirlistlen+1); 1688 b = xmalloc(hdr.dirlistlen + 1);
1466 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) { 1689 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1467 fclose(fp); 1690 fclose(fp);
1468 free(b); 1691 free(b);
1469 return i; 1692 return i;
1470 } 1693 }
1471 1694
1472 while ((p = strsep(&b, ":"))) { 1695 while ((p = strsep(&b, ":"))) {
1473 if (*p == '\0') continue; 1696 if (*p == '\0')
1474 ldpaths[i++] = xstrdup(p); 1697 continue;
1475 1698 xarraypush(ldpaths, p, strlen(p));
1476 if (i + 1 == ARRAY_SIZE(ldpaths))
1477 break;
1478 } 1699 }
1479 ldpaths[i] = NULL;
1480 1700
1481 free(b); 1701 free(b);
1482 fclose(fp); 1702 fclose(fp);
1483 return i; 1703 return i;
1484} 1704}
1485 1705
1486#else 1706#else
1487 1707#ifdef __ELF__
1488#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1709#endif
1489static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1490{ 1711{
1491 memset(ldpaths, 0x00, sizeof(ldpaths)); 1712 return 0;
1492} 1713}
1493
1494#endif 1714#endif
1495 1715
1496/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1497static void scanelf_ldpath() 1717static void scanelf_ldpath(void)
1498{ 1718{
1499 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1500 int i = 0; 1722 int i = 0;
1501 1723
1502 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1503 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1504 1726
1505 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1506 1728
1507 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1508 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1509 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1510 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1511 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1512 ++i; 1734 ++i;
1513 } 1735 }
1514 1736
1515 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1516 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1517 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1739 if (!scan_ull) scanelf_dir("/usr/local/lib");
1518} 1740}
1519 1741
1520/* scan env PATH for paths */ 1742/* scan env PATH for paths */
1521static void scanelf_envpath() 1743static void scanelf_envpath(void)
1522{ 1744{
1523 char *path, *p; 1745 char *path, *p;
1524 1746
1525 path = getenv("PATH"); 1747 path = getenv("PATH");
1526 if (!path) 1748 if (!path)
1533 } 1755 }
1534 1756
1535 free(path); 1757 free(path);
1536} 1758}
1537 1759
1538/* usage / invocation handling functions */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1539#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"
1540#define a_argument required_argument 1762#define a_argument required_argument
1541static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1542 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1543 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1544 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1545 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1546 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1547 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1548 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1561 {"lib", a_argument, NULL, 'N'}, 1784 {"lib", a_argument, NULL, 'N'},
1562 {"gmatch", no_argument, NULL, 'g'}, 1785 {"gmatch", no_argument, NULL, 'g'},
1563 {"textrels", no_argument, NULL, 'T'}, 1786 {"textrels", no_argument, NULL, 'T'},
1564 {"etype", a_argument, NULL, 'E'}, 1787 {"etype", a_argument, NULL, 'E'},
1565 {"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'},
1566 {"all", no_argument, NULL, 'a'}, 1794 {"all", no_argument, NULL, 'a'},
1567 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1568 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1569 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1570 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1571 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1572 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1573 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1574 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1575 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1576}; 1805};
1577 1806
1578static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1579 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1580 "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)",
1581 "Scan directories recursively", 1811 "Scan directories recursively",
1582 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1583 "Don't scan symlinks", 1813 "Don't scan symlinks",
1584 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1585 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1594 "Print BIND information", 1824 "Print BIND information",
1595 "Print SONAME information", 1825 "Print SONAME information",
1596 "Find a specified symbol", 1826 "Find a specified symbol",
1597 "Find a specified section", 1827 "Find a specified section",
1598 "Find a specified library", 1828 "Find a specified library",
1599 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1600 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1601 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1602 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1603 "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",
1604 "Only output 'bad' things", 1839 "Only output 'bad' things",
1605 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1606 "Use specified format for output", 1841 "Use specified format for output",
1607 "Read input stream from a filename", 1842 "Read input stream from a filename",
1608 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1609 "Don't display the header", 1845 "Don't display the header",
1610 "Print this help and exit", 1846 "Print this help and exit",
1611 "Print version and exit", 1847 "Print version and exit",
1612 NULL 1848 NULL
1613}; 1849};
1621 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1622 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1623 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1624 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 1860 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1625 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]);
1626 else 1865 else
1627 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1628 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1629 1868
1630 if (status != EXIT_SUCCESS) 1869 puts("\nFor more information, see the scanelf(1) manpage");
1631 exit(status);
1632
1633 puts("\nThe format modifiers for the -F option are:");
1634 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1635 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1636 puts(" i INTERP \tb BIND \ts symbol");
1637 puts(" N library \to Type \tT TEXTRELs");
1638 puts(" S SONAME \tk section \ta arch");
1639 puts(" p filename (with search path removed)");
1640 puts(" f filename (short name/basename)");
1641 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1642
1643 puts("\nELF Etypes:");
1644 print_etypes(stdout);
1645
1646 exit(status); 1870 exit(status);
1647} 1871}
1648 1872
1649/* parse command line arguments and preform needed actions */ 1873/* parse command line arguments and preform needed actions */
1650#define do_pax_state(option, flag) \ 1874#define do_pax_state(option, flag) \
1675 case 'f': 1899 case 'f':
1676 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");
1677 from_file = optarg; 1901 from_file = optarg;
1678 break; 1902 break;
1679 case 'E': 1903 case 'E':
1680 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1681 break; 1905 break;
1682 case 'M': 1906 case 'M':
1683 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;
1684 break; 1918 break;
1685 case 'o': { 1919 case 'o': {
1686 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1687 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1688 break; 1922 break;
1689 } 1923 }
1690 case 'k': 1924 case 'k':
1691 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1692 find_section = optarg;
1693 break; 1926 break;
1694 case 's': { 1927 case 's': {
1695 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");
1696 find_sym = optarg; 1929 find_sym = optarg;
1697 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1698 sprintf(versioned_symname, "%s@", find_sym);
1699 break; 1930 break;
1700 } 1931 }
1701 case 'N': { 1932 case 'N':
1702 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1703 find_lib = optarg;
1704 break; 1934 break;
1705 }
1706
1707 case 'F': { 1935 case 'F': {
1708 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");
1709 out_format = optarg; 1937 out_format = optarg;
1710 break; 1938 break;
1711 } 1939 }
1712 case 'z': { 1940 case 'z': {
1713 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1941 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1714 size_t x; 1942 size_t x;
1715 1943
1716 for (x = 0 ; x < strlen(optarg); x++) { 1944 for (x = 0; x < strlen(optarg); x++) {
1717 switch(optarg[x]) { 1945 switch (optarg[x]) {
1718 case 'p': 1946 case 'p':
1719 case 'P': 1947 case 'P':
1720 do_pax_state(optarg[x], PAGEEXEC); 1948 do_pax_state(optarg[x], PAGEEXEC);
1721 break; 1949 break;
1722 case 's': 1950 case 's':
1750 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1978 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1751 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1979 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1752 setpax = flags; 1980 setpax = flags;
1753 break; 1981 break;
1754 } 1982 }
1983 case 'Z': show_size = 1; break;
1755 case 'g': gmatch = 1; break; 1984 case 'g': g_match = 1; break;
1756 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1757 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1758 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1759 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1760 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1761 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1762 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1763 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1771 case 'b': show_bind = 1; break; 2001 case 'b': show_bind = 1; break;
1772 case 'S': show_soname = 1; break; 2002 case 'S': show_soname = 1; break;
1773 case 'T': show_textrels = 1; break; 2003 case 'T': show_textrels = 1; break;
1774 case 'q': be_quiet = 1; break; 2004 case 'q': be_quiet = 1; break;
1775 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1776 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;
1777 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;
1778 case ':': 2013 case ':':
1779 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1780 case '?': 2015 case '?':
1781 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1782 default: 2017 default:
1785 } 2020 }
1786 if (show_textrels && be_verbose) { 2021 if (show_textrels && be_verbose) {
1787 if (which("objdump") != NULL) 2022 if (which("objdump") != NULL)
1788 has_objdump = 1; 2023 has_objdump = 1;
1789 } 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);
1790 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1791 if (out_format) { 2031 if (out_format) {
1792 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1793 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1794 show_textrels = 0; 2034 show_textrels = show_perms = show_endian = show_size = \
2035 show_osabi = show_eabi = 0;
1795 for (i = 0; out_format[i]; ++i) { 2036 for (i = 0; out_format[i]; ++i) {
1796 if (!IS_MODIFIER(out_format[i])) continue; 2037 if (!IS_MODIFIER(out_format[i])) continue;
1797 2038
1798 switch (out_format[++i]) { 2039 switch (out_format[++i]) {
1799 case '+': break; 2040 case '+': break;
1806 case 's': break; 2047 case 's': break;
1807 case 'N': break; 2048 case 'N': break;
1808 case 'o': break; 2049 case 'o': break;
1809 case 'a': break; 2050 case 'a': break;
1810 case 'M': 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;
1811 case 'x': show_pax = 1; break; 2057 case 'x': show_pax = 1; break;
1812 case 'e': show_phdr = 1; break; 2058 case 'e': show_phdr = 1; break;
1813 case 't': show_textrel = 1; break; 2059 case 't': show_textrel = 1; break;
1814 case 'r': show_rpath = 1; break; 2060 case 'r': show_rpath = 1; break;
1815 case 'n': show_needed = 1; break; 2061 case 'n': show_needed = 1; break;
1824 } 2070 }
1825 2071
1826 /* construct our default format */ 2072 /* construct our default format */
1827 } else { 2073 } else {
1828 size_t fmt_len = 30; 2074 size_t fmt_len = 30;
1829 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2075 out_format = xmalloc(sizeof(char) * fmt_len);
2076 *out_format = '\0';
1830 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2077 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1831 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);
1832 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2084 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1833 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2085 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1834 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2086 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1835 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2087 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1836 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2088 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1861 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1862 ret = scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1863 } 2115 }
1864 2116
1865 /* clean up */ 2117 /* clean up */
1866 free(versioned_symname);
1867 for (i = 0; ldpaths[i]; ++i)
1868 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1869 2123
1870 if (ldcache != 0) 2124 if (ldcache != 0)
1871 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1872 return ret; 2126 return ret;
1873} 2127}
1903 2157
1904 /* 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
1905 * the envvals array of strings */ 2159 * the envvals array of strings */
1906 return envvals; 2160 return envvals;
1907} 2161}
2162
1908static void parseenv() 2163static void parseenv(void)
1909{ 2164{
2165 color_init(false);
1910 qa_textrels = get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
1911 qa_execstack = get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
1912 qa_wx_load = get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
1913} 2169}
1914 2170
1915#ifdef __PAX_UTILS_CLEANUP 2171#ifdef __PAX_UTILS_CLEANUP
1916static void cleanup() 2172static void cleanup(void)
1917{ 2173{
1918 free(out_format); 2174 free(out_format);
1919 free(qa_textrels); 2175 free(qa_textrels);
1920 free(qa_execstack); 2176 free(qa_execstack);
1921 free(qa_wx_load); 2177 free(qa_wx_load);
1922} 2178}
1923#endif 2179#endif
1924
1925 2180
1926int main(int argc, char *argv[]) 2181int main(int argc, char *argv[])
1927{ 2182{
1928 int ret; 2183 int ret;
1929 if (argc < 2) 2184 if (argc < 2)
1938 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD"); 2193 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1939#endif 2194#endif
1940 return ret; 2195 return ret;
1941} 2196}
1942 2197
1943
1944
1945/* utility funcs */
1946static char *xstrdup(const char *s)
1947{
1948 char *ret = strdup(s);
1949 if (!ret) err("Could not strdup(): %s", strerror(errno));
1950 return ret;
1951}
1952static void *xmalloc(size_t size)
1953{
1954 void *ret = malloc(size);
1955 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1956 return ret;
1957}
1958static void *xrealloc(void *ptr, size_t size)
1959{
1960 void *ret = realloc(ptr, size);
1961 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
1962 return ret;
1963}
1964static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1965{
1966 size_t new_len;
1967
1968 new_len = strlen(*dst) + strlen(src);
1969 if (*curr_len <= new_len) {
1970 *curr_len = new_len + (*curr_len / 2);
1971 *dst = realloc(*dst, *curr_len);
1972 if (!*dst)
1973 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1974 }
1975
1976 if (n)
1977 strncat(*dst, src, n);
1978 else
1979 strcat(*dst, src);
1980}
1981static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1982{
1983 static char my_app[2];
1984 my_app[0] = append;
1985 my_app[1] = '\0';
1986 xstrcat(dst, my_app, curr_len);
1987}
1988
1989/* Match filename against entries in matchlist, return TRUE 2198/* Match filename against entries in matchlist, return TRUE
1990 * if the file is listed */ 2199 * if the file is listed */
1991static int file_matches_list(const char *filename, char **matchlist) 2200static int file_matches_list(const char *filename, char **matchlist)
1992{ 2201{
1993 char **file; 2202 char **file;

Legend:
Removed from v.1.172  
changed lines
  Added in v.1.229

  ViewVC Help
Powered by ViewVC 1.1.20