/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.185 Revision 1.229
1/* 1/*
2 * Copyright 2003-2007 Gentoo Foundation 2 * Copyright 2003-2007 Gentoo Foundation
3 * Distributed under the terms of the GNU General Public License v2 3 * Distributed under the terms of the GNU General Public License v2
4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.185 2007/08/18 04:59:32 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $
5 * 5 *
6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10static const char *rcsid = "$Id: scanelf.c,v 1.229 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 1.185 2007/08/18 04:59:32 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);
36static int rematch(const char *regex, const char *match, int cflags);
37 19
38/* variables to control behavior */ 20/* variables to control behavior */
39static char match_etypes[126] = ""; 21static char *match_etypes = NULL;
40static char *ldpaths[256]; 22static array_t _ldpaths = array_init_decl, *ldpaths = &_ldpaths;
41static char scan_ldpath = 0; 23static char scan_ldpath = 0;
42static char scan_envpath = 0; 24static char scan_envpath = 0;
43static char scan_symlink = 1; 25static char scan_symlink = 1;
44static char scan_archives = 0; 26static char scan_archives = 0;
45static char dir_recurse = 0; 27static char dir_recurse = 0;
46static char dir_crossmount = 1; 28static char dir_crossmount = 1;
47static char show_pax = 0; 29static char show_pax = 0;
48static char show_perms = 0; 30static char show_perms = 0;
31static char show_size = 0;
49static char show_phdr = 0; 32static char show_phdr = 0;
50static char show_textrel = 0; 33static char show_textrel = 0;
51static char show_rpath = 0; 34static char show_rpath = 0;
52static char show_needed = 0; 35static char show_needed = 0;
53static char show_interp = 0; 36static char show_interp = 0;
54static char show_bind = 0; 37static char show_bind = 0;
55static char show_soname = 0; 38static char show_soname = 0;
56static char show_textrels = 0; 39static char show_textrels = 0;
57static char show_banner = 1; 40static char show_banner = 1;
58static char show_endian = 0; 41static char show_endian = 0;
42static char show_osabi = 0;
43static char show_eabi = 0;
59static char be_quiet = 0; 44static char be_quiet = 0;
60static char be_verbose = 0; 45static char be_verbose = 0;
61static char be_wewy_wewy_quiet = 0; 46static char be_wewy_wewy_quiet = 0;
62static char be_semi_verbose = 0; 47static char be_semi_verbose = 0;
63static char *find_sym = NULL, *versioned_symname = NULL; 48static char *find_sym = NULL;
64static char *find_lib = NULL; 49static char *find_lib = NULL;
50static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
65static char *find_section = NULL; 51static char *find_section = NULL;
52static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
66static char *out_format = NULL; 53static char *out_format = NULL;
67static char *search_path = NULL; 54static char *search_path = NULL;
68static char fix_elf = 0; 55static char fix_elf = 0;
69static char g_match = 0; 56static char g_match = 0;
70static char use_ldcache = 0; 57static char use_ldcache = 0;
71 58
72static char **qa_textrels = NULL; 59static char **qa_textrels = NULL;
73static char **qa_execstack = NULL; 60static char **qa_execstack = NULL;
74static char **qa_wx_load = NULL; 61static char **qa_wx_load = NULL;
62static char *root;
75 63
76int match_bits = 0; 64static int match_bits = 0;
77unsigned int match_perms = 0; 65static unsigned int match_perms = 0;
78caddr_t ldcache = 0; 66static void *ldcache = NULL;
79size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
80unsigned long setpax = 0UL; 68static unsigned long setpax = 0UL;
81 69
82int has_objdump = 0; 70static int has_objdump = 0;
83
84static char *getstr_perms(const char *fname);
85static char *getstr_perms(const char *fname) {
86 struct stat st;
87 static char buf[8];
88
89 if ((stat(fname, &st)) == (-1))
90 return (char *) "";
91
92 snprintf(buf, sizeof(buf), "%o", st.st_mode);
93
94 return (char *) buf + 2;
95}
96 71
97/* find the path to a file by name */ 72/* find the path to a file by name */
98static char *which(const char *fname) 73static char *which(const char *fname)
99{ 74{
100 static char fullpath[BUFSIZ]; 75 static char fullpath[__PAX_UTILS_PATH_MAX];
101 char *path, *p; 76 char *path, *p;
102 77
103 path = getenv("PATH"); 78 path = getenv("PATH");
104 if (!path) 79 if (!path)
105 return NULL; 80 return NULL;
106 81
107 path = xstrdup(path); 82 path = xstrdup(path);
108 while ((p = strrchr(path, ':')) != NULL) { 83 while ((p = strrchr(path, ':')) != NULL) {
109 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname); 84 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
110 *p = 0; 85 *p = 0;
111 if (access(fullpath, R_OK) != (-1)) { 86 if (access(fullpath, R_OK) != -1) {
112 free(path); 87 free(path);
113 return (char *) fullpath; 88 return fullpath;
114 } 89 }
115 } 90 }
116 free(path); 91 free(path);
117 return NULL; 92 return NULL;
118} 93}
123 regex_t preg; 98 regex_t preg;
124 int ret; 99 int ret;
125 100
126 if ((match == NULL) || (regex == NULL)) 101 if ((match == NULL) || (regex == NULL))
127 return EXIT_FAILURE; 102 return EXIT_FAILURE;
128
129 103
130 if ((ret = regcomp(&preg, regex, cflags))) { 104 if ((ret = regcomp(&preg, regex, cflags))) {
131 char err[256]; 105 char err[256];
132 106
133 if (regerror(ret, &preg, err, sizeof(err))) 107 if (regerror(ret, &preg, err, sizeof(err)))
145 119
146/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
147static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
148{ 122{
149 /* 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
150#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
151 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
152 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
153 /* debug sections */ \
154 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
155 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
156 /* runtime sections */ \
157 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
158 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
159 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
160 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
161 } else { \ 138 } else \
162 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
163 } \
164 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
165 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
166 } else { \ 144 } else \
167 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
168 } \
169 } 146 }
170 GET_SYMTABS(32) 147 GET_SYMTABS(32)
171 GET_SYMTABS(64) 148 GET_SYMTABS(64)
172} 149}
173 150
202 } \ 179 } \
203 } 180 }
204 SHOW_PAX(32) 181 SHOW_PAX(32)
205 SHOW_PAX(64) 182 SHOW_PAX(64)
206 } 183 }
207
208 184
209 if (fix_elf && setpax) { 185 if (fix_elf && setpax) {
210 /* set the chpax settings */ 186 /* set the chpax settings */
211 if (elf->elf_class == ELFCLASS32) { 187 if (elf->elf_class == ELFCLASS32) {
212 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)
271 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 247 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
272 found = found_relro; \ 248 found = found_relro; \
273 offset = 4; \ 249 offset = 4; \
274 check_flags = PF_X; \ 250 check_flags = PF_X; \
275 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 251 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
276 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) \
277 if (multi_load++ > max_pt_load) \ 253 if (multi_load++ > max_pt_load) \
278 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); \
279 if (file_matches_list(elf->filename, qa_wx_load)) \ 255 if (file_matches_list(elf->filename, qa_wx_load)) \
280 continue; \ 256 continue; \
281 found = found_load; \ 257 found = found_load; \
298 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
299 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
300 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
301 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
302 char *str; \ 278 char *str; \
303 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
304 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
305 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
306 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
307 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
308 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
339 return NULL; 315 return NULL;
340 else 316 else
341 return ret; 317 return ret;
342} 318}
343 319
320/*
321 * See if this ELF contains a DT_TEXTREL tag in any of its
322 * PT_DYNAMIC sections.
323 */
344static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 324static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
345{ 325{
346 static const char *ret = "TEXTREL"; 326 static const char *ret = "TEXTREL";
347 unsigned long i; 327 unsigned long i;
348 328
359 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
360 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
361 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 341 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
362 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
363 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
364 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
365 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
366 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)*/ \
367 *found_textrel = 1; \ 347 *found_textrel = 1; \
368 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
369 return (be_wewy_wewy_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
379 return NULL; 359 return NULL;
380 else 360 else
381 return " - "; 361 return " - ";
382} 362}
383 363
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 */
384static 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)
385{ 370{
386 unsigned long s, r, rmax; 371 unsigned long s, r, rmax;
387 void *symtab_void, *strtab_void, *text_void; 372 void *symtab_void, *strtab_void, *text_void;
388 373
409 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
410 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
411 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
412 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
413 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
414 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
415 rela = NULL; \ 400 rela = NULL; \
416 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
417 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
418 rel = NULL; \ 403 rel = NULL; \
419 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
420 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
421 } else \ 406 } else \
422 continue; \ 407 continue; \
423 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
424 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
439 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
440 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
441 } else \ 426 } else \
442 *found_textrels = 1; \ 427 *found_textrels = 1; \
443 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
444 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
445 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
446 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
447 continue; \ 432 continue; \
448 } \ 433 } \
449 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
450 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
453 sym = NULL; \ 438 sym = NULL; \
454 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
455 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
456 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
457 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
458 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)); \
459 else \ 444 else \
460 printf("(memory/data?)"); \ 445 printf("(memory/data?)"); \
461 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
462 /* 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 */ \
463 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
464 func = NULL; \ 449 func = NULL; \
465 offset_tmp = 0; \ 450 offset_tmp = 0; \
466 while (sym_max--) { \ 451 while (sym_max--) { \
467 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) { \
468 func = sym; \ 453 func = sym; \
479 printf("%s", func_name); \ 464 printf("%s", func_name); \
480 } else \ 465 } else \
481 printf("(optimized out)"); \ 466 printf("(optimized out)"); \
482 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 467 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
483 if (be_verbose && has_objdump) { \ 468 if (be_verbose && has_objdump) { \
469 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
484 char *sysbuf; \ 470 char *sysbuf; \
485 size_t syslen; \ 471 size_t syslen; \
472 int sysret; \
486 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"; \
487 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \ 474 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
488 sysbuf = xmalloc(syslen); \ 475 sysbuf = xmalloc(syslen); \
489 if (sysbuf) { \
490 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
491 if (end_addr < r_offset) \ 476 if (end_addr < r_offset) \
492 /* not uncommon when things are optimized out */ \ 477 /* not uncommon when things are optimized out */ \
493 end_addr = r_offset + 0x100; \ 478 end_addr = r_offset + 0x100; \
494 snprintf(sysbuf, syslen, sysfmt, \ 479 snprintf(sysbuf, syslen, sysfmt, \
495 (unsigned long)offset_tmp, \ 480 (unsigned long)offset_tmp, \
496 (unsigned long)end_addr, \ 481 (unsigned long)end_addr, \
497 elf->filename, \ 482 elf->filename, \
498 (unsigned long)r_offset); \ 483 (unsigned long)r_offset); \
499 fflush(stdout); \ 484 fflush(stdout); \
500 system(sysbuf); \ 485 sysret = system(sysbuf); \
501 fflush(stdout); \ 486 fflush(stdout); \
502 free(sysbuf); \ 487 free(sysbuf); \
503 } \
504 } \ 488 } \
505 } \ 489 } \
506 } } 490 } }
507 SHOW_TEXTRELS(32) 491 SHOW_TEXTRELS(32)
508 SHOW_TEXTRELS(64) 492 SHOW_TEXTRELS(64)
511 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);
512 496
513 return NULL; 497 return NULL;
514} 498}
515 499
516static void rpath_security_checks(elfobj *, char *, const char *);
517static 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)
518{ 501{
519 struct stat st; 502 struct stat st;
520 switch (*item) { 503 switch (*item) {
521 case '/': break; 504 case '/': break;
537 break; 520 break;
538 } 521 }
539} 522}
540static 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)
541{ 524{
542 unsigned long i, s; 525 unsigned long i;
543 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
544 void *strtbl_void; 527 void *strtbl_void;
545 528
546 if (!show_rpath) return; 529 if (!show_rpath) return;
547 530
562 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
563 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 546 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
564 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
565 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
566 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
567 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
568 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
569 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
570 r = &rpath; \ 553 r = &rpath; \
571 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
572 r = &runpath; \ 555 r = &runpath; \
576 } \ 559 } \
577 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
578 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
579 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
580 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
581 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
582 /* 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 */ \
583 if (fix_elf) \ 566 if (fix_elf) \
584 offset = strlen(*r); \ 567 offset = strlen(*r); \
585 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
586 if (be_quiet) { \ 569 if (be_quiet) { \
592 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
593 while (start) { \ 576 while (start) { \
594 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
595 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
596 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
597 if (use_ldcache) \ 580 if (use_ldcache) { \
598 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
599 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
600 *r = end; \ 585 *r = end; \
601 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
602 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
603 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
604 (*r)++; \ 589 (*r)++; \
605 break; \ 590 break; \
606 } \ 591 } \
592 } \
607 if (!*r || !end) \ 593 if (!*r || !end) \
608 break; \ 594 break; \
609 else \ 595 else \
610 start = start + len + 1; \ 596 start = start + len + 1; \
611 } \ 597 } \
696#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
697#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
698#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
699#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
700 686
701static char *lookup_cache_lib(elfobj *, char *);
702
703#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
704 688
705static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
706{ 690{
707 int fd = 0; 691 int fd;
708 char *strs; 692 char *strs;
709 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
710 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
711 struct stat st; 695 struct stat st;
712 696
713 typedef struct { 697 typedef struct {
714 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
715 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
725 libentry_t *libent; 709 libentry_t *libent;
726 710
727 if (fname == NULL) 711 if (fname == NULL)
728 return NULL; 712 return NULL;
729 713
730 if (ldcache == 0) { 714 if (ldcache == NULL) {
731 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)
732 return NULL; 720 return NULL;
733 721
734 /* 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 */
735 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
736 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
737
738 close(fd); 725 close(fd);
739 726
740 if (ldcache == (caddr_t)-1) { 727 if (ldcache == MAP_FAILED) {
741 ldcache = 0; 728 ldcache = NULL;
742 return NULL; 729 return NULL;
743 } 730 }
744 731
745 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;
746 return NULL; 737 return NULL;
747 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
748 return NULL;
749 } 738 }
739 } else
740 header = ldcache;
750 741
751 header = (header_t *) ldcache;
752 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
753 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
754 744
755 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
756 /* 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
757 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
758 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
759 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
760 continue; 751 continue;
761 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
762 continue; 753 continue;
763 754
764 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
765 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
766 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
767 } 761 }
762
768 return buf; 763 return buf;
769} 764}
765
770#elif defined(__NetBSD__) 766#elif defined(__NetBSD__)
771static char *lookup_cache_lib(elfobj *elf, char *fname) 767static char *lookup_cache_lib(elfobj *elf, char *fname)
772{ 768{
773 static char buf[__PAX_UTILS_PATH_MAX] = ""; 769 static char buf[__PAX_UTILS_PATH_MAX] = "";
774 static struct stat st; 770 static struct stat st;
775 771 size_t n;
776 char **ldpath; 772 char *ldpath;
777 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 773
774 array_for_each(ldpath, n, ldpath) {
778 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))
779 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 */
780 777
781 if (stat(buf, &st) != 0) 778 if (stat(buf, &st) != 0)
782 continue; /* if the lib doesn't exist in *ldpath, look further */ 779 continue; /* if the lib doesn't exist in *ldpath, look further */
783 780
791 788
792 /* not found in any path */ 789 /* not found in any path */
793 return NULL; 790 return NULL;
794} 791}
795#else 792#else
793#ifdef __ELF__
796#warning Cache support not implemented for your target 794#warning Cache support not implemented for your target
795#endif
797static char *lookup_cache_lib(elfobj *elf, char *fname) 796static char *lookup_cache_lib(elfobj *elf, char *fname)
798{ 797{
799 return NULL; 798 return NULL;
800} 799}
801#endif 800#endif
805 unsigned long i; 804 unsigned long i;
806 char *needed; 805 char *needed;
807 void *strtbl_void; 806 void *strtbl_void;
808 char *p; 807 char *p;
809 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
810 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
811 815
812 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
813 817
814 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
815#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
817 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
818 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
819 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
820 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
821 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 */ \
822 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
823 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 829 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) \
830 continue; \
824 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
825 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 */ \
826 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
827 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
828 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
829 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
830 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
831 ++dyn; \ 840 ++dyn; \
832 continue; \ 841 continue; \
833 } \ 842 } \
834 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
835 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
836 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
837 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
838 if (use_ldcache) \ 848 if (use_ldcache) \
839 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
840 needed = p; \ 850 needed = p; \
841 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
842 } \ 852 } \
843 *found_needed = 1; \ 853 *found_needed = 1; \
844 } else { \ 854 } else { \
845 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \ 855 /* -N -> print matching entries */ \
856 size_t n; \
857 const char *find_lib_name; \
858 \
859 array_for_each(find_lib_arr, n, find_lib_name) \
860 if (!strcmp(find_lib_name, needed)) \
861 ++matched; \
862 \
863 if (matched == array_cnt(find_lib_arr)) { \
846 *found_lib = 1; \ 864 *found_lib = 1; \
847 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
848 } \ 866 } \
849 } \ 867 } \
850 } \ 868 } \
851 ++dyn; \ 869 ++dyn; \
852 } \ 870 } \
897 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
898 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 916 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
899 dynamic = 1; \ 917 dynamic = 1; \
900 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
901 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
902 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
903 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
904 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
905 (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)) \
906 { \ 924 { \
907 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
920 /* 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 */
921 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))))) {
922 return NULL; 940 return NULL;
923 } else { 941 } else {
924 *found_bind = 1; 942 *found_bind = 1;
925 return (char *) (dynamic ? "LAZY" : "STATIC"); 943 return (char *)(dynamic ? "LAZY" : "STATIC");
926 } 944 }
927} 945}
928static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
929{ 947{
930 unsigned long i; 948 unsigned long i;
942 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 960 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
943 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 961 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
944 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 962 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
945 Elf ## B ## _Off offset; \ 963 Elf ## B ## _Off offset; \
946 /* only look for soname in shared objects */ \ 964 /* only look for soname in shared objects */ \
947 if (ehdr->e_type != ET_DYN) \ 965 if (EGET(ehdr->e_type) != ET_DYN) \
948 return NULL; \ 966 return NULL; \
949 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
950 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 968 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
951 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
952 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
953 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
954 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
955 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
956 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
957 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
958 ++dyn; \ 976 ++dyn; \
959 continue; \ 977 continue; \
960 } \ 978 } \
961 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
962 *found_soname = 1; \ 980 *found_soname = 1; \
963 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
964 } \ 982 } \
965 ++dyn; \ 983 ++dyn; \
966 } \ 984 } \
970 } 988 }
971 989
972 return NULL; 990 return NULL;
973} 991}
974 992
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
975static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
976{ 1161{
977 unsigned long i; 1162 unsigned long i;
978 char *ret; 1163 char *ret;
979 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
980 1165
981 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
982 ret = find_sym; 1167 ret = NULL;
983 1168
984 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
985 1170
986 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
987#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
988 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
989 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
990 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
991 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)); \
992 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
993 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
994 if (cnt) \ 1180 if (cnt) \
995 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
996 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 } \
997 if (sym->st_name) { \ 1187 if (sym->st_name) { \
998 /* make sure the symbol name is in acceptable memory range */ \ 1188 /* make sure the symbol name is in acceptable memory range */ \
999 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
1000 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
1001 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
1002 ++sym; \ 1192 ++sym; \
1003 continue; \ 1193 continue; \
1004 } \ 1194 } \
1005 /* debug display ... show all symbols and some extra info */ \ 1195 scanelf_match_symname(elf, found_sym, \
1006 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \ 1196 &ret, &ret_len, symname, \
1007 printf("%s(%s) %5lX %15s %s %s\n", \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
1008 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
1009 elf->base_filename, \ 1199 EGET(sym->st_shndx), \
1010 (unsigned long)sym->st_size, \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
1011 get_elfstttype(sym->st_info), \ 1201 EGET(sym->st_size)); \
1012 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1013 *found_sym = 1; \
1014 } else { \
1015 /* allow the user to specify a comma delimited list of symbols to search for */ \
1016 char *this_sym, *this_sym_ver, *next_sym; \
1017 this_sym = ret; \
1018 this_sym_ver = versioned_symname; \
1019 do { \
1020 next_sym = strchr(this_sym, ','); \
1021 if (next_sym == NULL) \
1022 next_sym = this_sym + strlen(this_sym); \
1023 /* do we want a defined symbol ? */ \
1024 if (*this_sym == '+') { \
1025 if (sym->st_shndx == SHN_UNDEF) \
1026 goto skip_this_sym##B; \
1027 ++this_sym; \
1028 ++this_sym_ver; \
1029 /* do we want an undefined symbol ? */ \
1030 } else if (*this_sym == '-') { \
1031 if (sym->st_shndx != SHN_UNDEF) \
1032 goto skip_this_sym##B; \
1033 ++this_sym; \
1034 ++this_sym_ver; \
1035 } \
1036 /* ok, lets compare the name now */ \
1037 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
1038 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
1039 if (be_semi_verbose) { \
1040 char buf[126]; \
1041 snprintf(buf, sizeof(buf), "%lX %s %s", \
1042 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1043 ret = buf; \
1044 } else \
1045 ret = this_sym; \
1046 (*found_sym)++; \
1047 goto break_out; \
1048 } \
1049 skip_this_sym##B: this_sym = next_sym + 1; \
1050 } while (*next_sym != '\0'); \
1051 } \
1052 } \ 1202 } \
1053 ++sym; \ 1203 ++sym; \
1054 } } 1204 } }
1055 FIND_SYM(32) 1205 FIND_SYM(32)
1056 FIND_SYM(64) 1206 FIND_SYM(64)
1062 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
1063 return ret; 1213 return ret;
1064 if (be_quiet) 1214 if (be_quiet)
1065 return NULL; 1215 return NULL;
1066 else 1216 else
1067 return (char *)" - "; 1217 return " - ";
1068} 1218}
1069 1219
1070
1071static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1072{ 1221{
1073 if (!find_section) 1222 if (!find_section)
1074 return NULL; 1223 return NULL;
1075 1224
1076#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
1077 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1078 int invert; \ 1228 int invert; \
1229 const char *section_name; \
1079 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1080 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
1081 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1082 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)) \
1083 *found_section = 1; \ 1241 *found_section = 1; \
1084 } 1242 }
1085 FIND_SECTION(32) 1243 FIND_SECTION(32)
1086 FIND_SECTION(64) 1244 FIND_SECTION(64)
1087 1245
1092 return find_section; 1250 return find_section;
1093 1251
1094 if (be_quiet) 1252 if (be_quiet)
1095 return NULL; 1253 return NULL;
1096 else 1254 else
1097 return (char *)" - "; 1255 return " - ";
1098} 1256}
1099 1257
1100/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1101#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1102static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1103{ 1261{
1104 unsigned long i; 1262 unsigned long i;
1105 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1106 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
1120 printf("%s: scanning file\n", elf->filename); 1278 printf("%s: scanning file\n", elf->filename);
1121 1279
1122 /* init output buffer */ 1280 /* init output buffer */
1123 if (!out_buffer) { 1281 if (!out_buffer) {
1124 out_len = sizeof(char) * 80; 1282 out_len = sizeof(char) * 80;
1125 out_buffer = (char*)xmalloc(out_len); 1283 out_buffer = xmalloc(out_len);
1126 } 1284 }
1127 *out_buffer = '\0'; 1285 *out_buffer = '\0';
1128 1286
1129 /* show the header */ 1287 /* show the header */
1130 if (!be_quiet && show_banner) { 1288 if (!be_quiet && show_banner) {
1145 case 'r': prints("RPATH "); break; 1303 case 'r': prints("RPATH "); break;
1146 case 'M': prints("CLASS "); break; 1304 case 'M': prints("CLASS "); break;
1147 case 'n': prints("NEEDED "); break; 1305 case 'n': prints("NEEDED "); break;
1148 case 'i': prints("INTERP "); break; 1306 case 'i': prints("INTERP "); break;
1149 case 'b': prints("BIND "); break; 1307 case 'b': prints("BIND "); break;
1308 case 'Z': prints("SIZE "); break;
1150 case 'S': prints("SONAME "); break; 1309 case 'S': prints("SONAME "); break;
1151 case 's': prints("SYM "); break; 1310 case 's': prints("SYM "); break;
1152 case 'N': prints("LIB "); break; 1311 case 'N': prints("LIB "); break;
1153 case 'T': prints("TEXTRELS "); break; 1312 case 'T': prints("TEXTRELS "); break;
1154 case 'k': prints("SECTION "); break; 1313 case 'k': prints("SECTION "); break;
1155 case 'a': prints("ARCH "); break; 1314 case 'a': prints("ARCH "); break;
1315 case 'I': prints("OSABI "); break;
1316 case 'Y': prints("EABI "); break;
1156 case 'O': prints("PERM "); break; 1317 case 'O': prints("PERM "); break;
1157 case 'D': prints("ENDIAN "); break; 1318 case 'D': prints("ENDIAN "); break;
1158 default: warnf("'%c' has no title ?", out_format[i]); 1319 default: warnf("'%c' has no title ?", out_format[i]);
1159 } 1320 }
1160 } 1321 }
1166 1327
1167 /* dump all the good stuff */ 1328 /* dump all the good stuff */
1168 for (i = 0; out_format[i]; ++i) { 1329 for (i = 0; out_format[i]; ++i) {
1169 const char *out; 1330 const char *out;
1170 const char *tmp; 1331 const char *tmp;
1171 1332 static char ubuf[sizeof(unsigned long)*2];
1172 if (!IS_MODIFIER(out_format[i])) { 1333 if (!IS_MODIFIER(out_format[i])) {
1173 xchrcat(&out_buffer, out_format[i], &out_len); 1334 xchrcat(&out_buffer, out_format[i], &out_len);
1174 continue; 1335 continue;
1175 } 1336 }
1176 1337
1214 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1215 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;
1216 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;
1217 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;
1218 case 'D': out = get_endian(elf); break; 1379 case 'D': out = get_endian(elf); break;
1219 case 'O': out = getstr_perms(elf->filename); break; 1380 case 'O': out = strfileperms(elf->filename); break;
1220 case 'n': 1381 case 'n':
1221 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;
1222 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1223 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1224 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1225 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1386 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1226 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1387 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1227 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;;
1228 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1229 } 1393 }
1230 if (out) { 1394 if (out)
1231 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1232 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1233 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1234 else
1235 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1236 }
1237 } 1396 }
1238 1397
1239#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1240 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1241 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1273 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1274 goto label_done; 1433 goto label_done;
1275 break; 1434 break;
1276 default: break; 1435 default: break;
1277 } 1436 }
1278 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1279 char sbuf[126]; 1438 char sbuf[126];
1280 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1281 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1282 char *p; 1441 char *p;
1283 while((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1284 *p = 0; 1443 *p = 0;
1285 if (etype_lookup(p+1) == get_etype(elf)) 1444 if (etype_lookup(p+1) == get_etype(elf))
1286 goto label_ret; 1445 goto label_ret;
1287 } 1446 }
1288 } 1447 }
1308 1467
1309 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1310 if (ar == NULL) 1469 if (ar == NULL)
1311 return 1; 1470 return 1;
1312 1471
1313 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);
1314 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");
1315 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);
1316 if (elf) { 1478 if (elf) {
1317 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1318 unreadelf(elf); 1480 unreadelf(elf);
1319 } 1481 }
1320 } 1482 }
1354 1516
1355 close(fd); 1517 close(fd);
1356 return 0; 1518 return 0;
1357} 1519}
1358 1520
1521static const char *maybe_add_root(const char *fname, char *buf)
1522{
1523 if (root && strncmp(fname, root, strlen(root))) {
1524 strcpy(buf, root);
1525 strncat(buf, fname, __PAX_UTILS_PATH_MAX - strlen(root) - 1);
1526 fname = buf;
1527 }
1528 return fname;
1529}
1530
1359/* 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 */
1360static int scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1361{ 1533{
1362 register DIR *dir; 1534 register DIR *dir;
1363 register struct dirent *dentry; 1535 register struct dirent *dentry;
1364 struct stat st_top, st; 1536 struct stat st_top, st;
1365 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1366 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1367 int ret = 0; 1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1368 1543
1369 /* make sure path exists */ 1544 /* make sure path exists */
1370 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1371 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1372 return 1; 1547 return 1;
1436static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1437{ 1612{
1438 FILE *fp = NULL; 1613 FILE *fp = NULL;
1439 char *p; 1614 char *p;
1440 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1441 1617
1442 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1443 return i;
1444 1619
1445 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1446 return i; 1621 return i;
1447 1622
1448 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1449 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1450 *p = 0; 1625 *p = 0;
1451 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1452 *p = 0; 1627 *p = 0;
1453#ifdef __linux__ 1628
1454 // recursive includes of the same file will make this segfault. 1629 /* recursive includes of the same file will make this segfault. */
1455 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1456 glob64_t gl; 1631 glob_t gl;
1457 size_t x; 1632 size_t x;
1458 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1459 1634
1460 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1461 1638
1462 if (path[8] != '/') 1639 if (path[8] != '/')
1463 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1464 else 1641 else
1465 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1466 1643
1467 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1468 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1469 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1470 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1471 continue; 1648 continue;
1472 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1473 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1474 globfree64(&gl);
1475 return i;
1476 }
1477 } 1650 }
1478 globfree64 (&gl); 1651 globfree(&gl);
1479 continue; 1652 continue;
1480 } 1653 }
1481 } 1654 }
1482#endif 1655
1483 if (*path != '/') 1656 if (*path != '/')
1484 continue; 1657 continue;
1485 1658
1486 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1487
1488 if (i + 1 == ARRAY_SIZE(ldpaths))
1489 break;
1490 } 1660 }
1491 ldpaths[i] = NULL;
1492 1661
1493 fclose(fp); 1662 fclose(fp);
1494 return i; 1663 return i;
1495} 1664}
1496 1665
1497#elif defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1498 1667
1499static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1500{ 1669{
1501 FILE *fp = NULL; 1670 FILE *fp = NULL;
1502 char *b = NULL, *p; 1671 char *b = NULL, *p;
1503 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1504 1674
1505 if (i + 1 == ARRAY_SIZE(ldpaths)) 1675 fname = maybe_add_root(fname, _fname);
1506 return i;
1507 1676
1508 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1509 return i; 1678 return i;
1510 1679
1511 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1514 { 1683 {
1515 fclose(fp); 1684 fclose(fp);
1516 return i; 1685 return i;
1517 } 1686 }
1518 1687
1519 b = (char*)malloc(hdr.dirlistlen+1); 1688 b = xmalloc(hdr.dirlistlen + 1);
1520 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) { 1689 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1521 fclose(fp); 1690 fclose(fp);
1522 free(b); 1691 free(b);
1523 return i; 1692 return i;
1524 } 1693 }
1525 1694
1526 while ((p = strsep(&b, ":"))) { 1695 while ((p = strsep(&b, ":"))) {
1527 if (*p == '\0') continue; 1696 if (*p == '\0')
1528 ldpaths[i++] = xstrdup(p); 1697 continue;
1529 1698 xarraypush(ldpaths, p, strlen(p));
1530 if (i + 1 == ARRAY_SIZE(ldpaths))
1531 break;
1532 } 1699 }
1533 ldpaths[i] = NULL;
1534 1700
1535 free(b); 1701 free(b);
1536 fclose(fp); 1702 fclose(fp);
1537 return i; 1703 return i;
1538} 1704}
1539 1705
1540#else 1706#else
1541 1707#ifdef __ELF__
1542#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1709#endif
1543static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1544{ 1711{
1545 memset(ldpaths, 0x00, sizeof(ldpaths)); 1712 return 0;
1546} 1713}
1547
1548#endif 1714#endif
1549 1715
1550/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1551static void scanelf_ldpath(void) 1717static void scanelf_ldpath(void)
1552{ 1718{
1553 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1554 int i = 0; 1722 int i = 0;
1555 1723
1556 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1557 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1558 1726
1559 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1560 1728
1561 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1562 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1563 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1564 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1565 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1566 ++i; 1734 ++i;
1567 } 1735 }
1568 1736
1569 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1570 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1587 } 1755 }
1588 1756
1589 free(path); 1757 free(path);
1590} 1758}
1591 1759
1592
1593/* usage / invocation handling functions */ /* Free Flags: c d j u w C G H I J K P Q U W Y Z */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1594#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DO:BhV" 1761#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZCBhV"
1595#define a_argument required_argument 1762#define a_argument required_argument
1596static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1597 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1598 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1599 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1600 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1601 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1602 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1603 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1617 {"gmatch", no_argument, NULL, 'g'}, 1785 {"gmatch", no_argument, NULL, 'g'},
1618 {"textrels", no_argument, NULL, 'T'}, 1786 {"textrels", no_argument, NULL, 'T'},
1619 {"etype", a_argument, NULL, 'E'}, 1787 {"etype", a_argument, NULL, 'E'},
1620 {"bits", a_argument, NULL, 'M'}, 1788 {"bits", a_argument, NULL, 'M'},
1621 {"endian", no_argument, NULL, 'D'}, 1789 {"endian", no_argument, NULL, 'D'},
1790 {"osabi", no_argument, NULL, 'I'},
1791 {"eabi", no_argument, NULL, 'Y'},
1622 {"perms", a_argument, NULL, 'O'}, 1792 {"perms", a_argument, NULL, 'O'},
1793 {"size", no_argument, NULL, 'Z'},
1623 {"all", no_argument, NULL, 'a'}, 1794 {"all", no_argument, NULL, 'a'},
1624 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1625 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1626 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1627 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1628 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1629 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1630 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1631 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1632 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1633}; 1805};
1634 1806
1635static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1636 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1637 "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)",
1638 "Scan directories recursively", 1811 "Scan directories recursively",
1639 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1640 "Don't scan symlinks", 1813 "Don't scan symlinks",
1641 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1642 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1651 "Print BIND information", 1824 "Print BIND information",
1652 "Print SONAME information", 1825 "Print SONAME information",
1653 "Find a specified symbol", 1826 "Find a specified symbol",
1654 "Find a specified section", 1827 "Find a specified section",
1655 "Find a specified library", 1828 "Find a specified library",
1656 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1657 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1658 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1659 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1660 "Print Endianness", 1833 "Print Endianness",
1834 "Print OSABI",
1835 "Print EABI (EM_ARM Only)",
1661 "Print only ELF files matching octal permissions", 1836 "Print only ELF files matching octal permissions",
1662 "Print all scanned info (-x -e -t -r -b)\n", 1837 "Print ELF file size",
1838 "Print all useful/simple info\n",
1663 "Only output 'bad' things", 1839 "Only output 'bad' things",
1664 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1665 "Use specified format for output", 1841 "Use specified format for output",
1666 "Read input stream from a filename", 1842 "Read input stream from a filename",
1667 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1668 "Don't display the header", 1845 "Don't display the header",
1669 "Print this help and exit", 1846 "Print this help and exit",
1670 "Print version and exit", 1847 "Print version and exit",
1671 NULL 1848 NULL
1672}; 1849};
1679 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0); 1856 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1680 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1681 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1682 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1683 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 1860 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1861 long_opts[i].name, opts_help[i]);
1862 else if (long_opts[i].val > '~')
1863 printf(" --%-7s <arg> * %s\n",
1684 long_opts[i].name, opts_help[i]); 1864 long_opts[i].name, opts_help[i]);
1685 else 1865 else
1686 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1687 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1688 1868
1719 case 'f': 1899 case 'f':
1720 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");
1721 from_file = optarg; 1901 from_file = optarg;
1722 break; 1902 break;
1723 case 'E': 1903 case 'E':
1724 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1725 break; 1905 break;
1726 case 'M': 1906 case 'M':
1727 match_bits = atoi(optarg); 1907 match_bits = atoi(optarg);
1728 if (match_bits == 0) { 1908 if (match_bits == 0) {
1729 if (strcmp(optarg, "ELFCLASS32") == 0) 1909 if (strcmp(optarg, "ELFCLASS32") == 0)
1731 if (strcmp(optarg, "ELFCLASS64") == 0) 1911 if (strcmp(optarg, "ELFCLASS64") == 0)
1732 match_bits = 64; 1912 match_bits = 64;
1733 } 1913 }
1734 break; 1914 break;
1735 case 'O': 1915 case 'O':
1736 if (sscanf(optarg, "%o", &match_perms) == (-1)) 1916 if (sscanf(optarg, "%o", &match_perms) == -1)
1737 match_bits = 0; 1917 match_bits = 0;
1738 break; 1918 break;
1739 case 'o': { 1919 case 'o': {
1740 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1741 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1742 break; 1922 break;
1743 } 1923 }
1744 case 'k': 1924 case 'k':
1745 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1746 find_section = optarg;
1747 break; 1926 break;
1748 case 's': { 1927 case 's': {
1749 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");
1750 find_sym = optarg; 1929 find_sym = optarg;
1751 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1752 sprintf(versioned_symname, "%s@", find_sym);
1753 break; 1930 break;
1754 } 1931 }
1755 case 'N': { 1932 case 'N':
1756 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1757 find_lib = optarg;
1758 break; 1934 break;
1759 }
1760
1761 case 'F': { 1935 case 'F': {
1762 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");
1763 out_format = optarg; 1937 out_format = optarg;
1764 break; 1938 break;
1765 } 1939 }
1766 case 'z': { 1940 case 'z': {
1767 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1941 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1768 size_t x; 1942 size_t x;
1769 1943
1770 for (x = 0 ; x < strlen(optarg); x++) { 1944 for (x = 0; x < strlen(optarg); x++) {
1771 switch(optarg[x]) { 1945 switch (optarg[x]) {
1772 case 'p': 1946 case 'p':
1773 case 'P': 1947 case 'P':
1774 do_pax_state(optarg[x], PAGEEXEC); 1948 do_pax_state(optarg[x], PAGEEXEC);
1775 break; 1949 break;
1776 case 's': 1950 case 's':
1804 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1978 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1805 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1979 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1806 setpax = flags; 1980 setpax = flags;
1807 break; 1981 break;
1808 } 1982 }
1983 case 'Z': show_size = 1; break;
1809 case 'g': g_match = 1; break; 1984 case 'g': g_match = 1; break;
1810 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1811 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1812 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1813 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1814 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1815 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1816 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1817 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1827 case 'T': show_textrels = 1; break; 2003 case 'T': show_textrels = 1; break;
1828 case 'q': be_quiet = 1; break; 2004 case 'q': be_quiet = 1; break;
1829 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1830 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break; 2006 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1831 case 'D': show_endian = 1; break; 2007 case 'D': show_endian = 1; break;
2008 case 'I': show_osabi = 1; break;
2009 case 'Y': show_eabi = 1; break;
2010 case 128:
2011 root = optarg;
2012 break;
1832 case ':': 2013 case ':':
1833 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1834 case '?': 2015 case '?':
1835 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1836 default: 2017 default:
1839 } 2020 }
1840 if (show_textrels && be_verbose) { 2021 if (show_textrels && be_verbose) {
1841 if (which("objdump") != NULL) 2022 if (which("objdump") != NULL)
1842 has_objdump = 1; 2023 has_objdump = 1;
1843 } 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);
1844 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1845 if (out_format) { 2031 if (out_format) {
1846 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1847 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1848 show_textrels = show_perms = show_endian = 0; 2034 show_textrels = show_perms = show_endian = show_size = \
2035 show_osabi = show_eabi = 0;
1849 for (i = 0; out_format[i]; ++i) { 2036 for (i = 0; out_format[i]; ++i) {
1850 if (!IS_MODIFIER(out_format[i])) continue; 2037 if (!IS_MODIFIER(out_format[i])) continue;
1851 2038
1852 switch (out_format[++i]) { 2039 switch (out_format[++i]) {
1853 case '+': break; 2040 case '+': break;
1860 case 's': break; 2047 case 's': break;
1861 case 'N': break; 2048 case 'N': break;
1862 case 'o': break; 2049 case 'o': break;
1863 case 'a': break; 2050 case 'a': break;
1864 case 'M': break; 2051 case 'M': break;
2052 case 'Z': show_size = 1; break;
1865 case 'D': show_endian = 1; break; 2053 case 'D': show_endian = 1; break;
2054 case 'I': show_osabi = 1; break;
2055 case 'Y': show_eabi = 1; break;
1866 case 'O': show_perms = 1; break; 2056 case 'O': show_perms = 1; break;
1867 case 'x': show_pax = 1; break; 2057 case 'x': show_pax = 1; break;
1868 case 'e': show_phdr = 1; break; 2058 case 'e': show_phdr = 1; break;
1869 case 't': show_textrel = 1; break; 2059 case 't': show_textrel = 1; break;
1870 case 'r': show_rpath = 1; break; 2060 case 'r': show_rpath = 1; break;
1880 } 2070 }
1881 2071
1882 /* construct our default format */ 2072 /* construct our default format */
1883 } else { 2073 } else {
1884 size_t fmt_len = 30; 2074 size_t fmt_len = 30;
1885 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2075 out_format = xmalloc(sizeof(char) * fmt_len);
2076 *out_format = '\0';
1886 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2077 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1887 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 2078 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1888 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len); 2079 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
2080 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
1889 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len); 2081 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
2082 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
2083 if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1890 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2084 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1891 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2085 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1892 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2086 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1893 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2087 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1894 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2088 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1919 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1920 ret = scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1921 } 2115 }
1922 2116
1923 /* clean up */ 2117 /* clean up */
1924 free(versioned_symname);
1925 for (i = 0; ldpaths[i]; ++i)
1926 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1927 2123
1928 if (ldcache != 0) 2124 if (ldcache != 0)
1929 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1930 return ret; 2126 return ret;
1931} 2127}
1964 return envvals; 2160 return envvals;
1965} 2161}
1966 2162
1967static void parseenv(void) 2163static void parseenv(void)
1968{ 2164{
2165 color_init(false);
1969 qa_textrels = get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
1970 qa_execstack = get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
1971 qa_wx_load = get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
1972} 2169}
1973 2170
1978 free(qa_textrels); 2175 free(qa_textrels);
1979 free(qa_execstack); 2176 free(qa_execstack);
1980 free(qa_wx_load); 2177 free(qa_wx_load);
1981} 2178}
1982#endif 2179#endif
1983
1984 2180
1985int main(int argc, char *argv[]) 2181int main(int argc, char *argv[])
1986{ 2182{
1987 int ret; 2183 int ret;
1988 if (argc < 2) 2184 if (argc < 2)
1997 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD"); 2193 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1998#endif 2194#endif
1999 return ret; 2195 return ret;
2000} 2196}
2001 2197
2002
2003
2004/* utility funcs */
2005static char *xstrdup(const char *s)
2006{
2007 char *ret = strdup(s);
2008 if (!ret) err("Could not strdup(): %s", strerror(errno));
2009 return ret;
2010}
2011static void *xmalloc(size_t size)
2012{
2013 void *ret = malloc(size);
2014 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
2015 return ret;
2016}
2017static void *xrealloc(void *ptr, size_t size)
2018{
2019 void *ret = realloc(ptr, size);
2020 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
2021 return ret;
2022}
2023static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
2024{
2025 size_t new_len;
2026
2027 new_len = strlen(*dst) + strlen(src);
2028 if (*curr_len <= new_len) {
2029 *curr_len = new_len + (*curr_len / 2);
2030 *dst = realloc(*dst, *curr_len);
2031 if (!*dst)
2032 err("could not realloc() %li bytes", (unsigned long)*curr_len);
2033 }
2034
2035 if (n)
2036 strncat(*dst, src, n);
2037 else
2038 strcat(*dst, src);
2039}
2040static inline void xchrcat(char **dst, const char append, size_t *curr_len)
2041{
2042 static char my_app[2];
2043 my_app[0] = append;
2044 my_app[1] = '\0';
2045 xstrcat(dst, my_app, curr_len);
2046}
2047
2048/* Match filename against entries in matchlist, return TRUE 2198/* Match filename against entries in matchlist, return TRUE
2049 * if the file is listed */ 2199 * if the file is listed */
2050static int file_matches_list(const char *filename, char **matchlist) 2200static int file_matches_list(const char *filename, char **matchlist)
2051{ 2201{
2052 char **file; 2202 char **file;

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