/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.180 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 1.180 2007/06/09 21:43:53 solar Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $
5 * 5 *
6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10static const char *rcsid = "$Id: scanelf.c,v 1.229 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 1.180 2007/06/09 21:43:53 solar 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;
41static char show_endian = 0;
42static char show_osabi = 0;
43static char show_eabi = 0;
58static char be_quiet = 0; 44static char be_quiet = 0;
59static char be_verbose = 0; 45static char be_verbose = 0;
60static char be_wewy_wewy_quiet = 0; 46static char be_wewy_wewy_quiet = 0;
61static char be_semi_verbose = 0; 47static char be_semi_verbose = 0;
62static char *find_sym = NULL, *versioned_symname = NULL; 48static char *find_sym = NULL;
63static char *find_lib = NULL; 49static char *find_lib = NULL;
50static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
64static char *find_section = NULL; 51static char *find_section = NULL;
52static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
65static char *out_format = NULL; 53static char *out_format = NULL;
66static char *search_path = NULL; 54static char *search_path = NULL;
67static char fix_elf = 0; 55static char fix_elf = 0;
68static char g_match = 0; 56static char g_match = 0;
69static char use_ldcache = 0; 57static char use_ldcache = 0;
70 58
71static char **qa_textrels = NULL; 59static char **qa_textrels = NULL;
72static char **qa_execstack = NULL; 60static char **qa_execstack = NULL;
73static char **qa_wx_load = NULL; 61static char **qa_wx_load = NULL;
62static char *root;
74 63
75int match_bits = 0; 64static int match_bits = 0;
76unsigned int match_perms = 0; 65static unsigned int match_perms = 0;
77caddr_t ldcache = 0; 66static void *ldcache = NULL;
78size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
79unsigned long setpax = 0UL; 68static unsigned long setpax = 0UL;
80 69
81int has_objdump = 0; 70static int has_objdump = 0;
82
83static char *getstr_perms(const char *fname);
84static char *getstr_perms(const char *fname) {
85 struct stat st;
86 static char buf[8];
87
88 if ((stat(fname, &st)) == (-1))
89 return (char *) "";
90
91 snprintf(buf, sizeof(buf), "%o", st.st_mode);
92
93 return (char *) buf + 2;
94}
95 71
96/* find the path to a file by name */ 72/* find the path to a file by name */
97static char *which(const char *fname) 73static char *which(const char *fname)
98{ 74{
99 static char fullpath[BUFSIZ]; 75 static char fullpath[__PAX_UTILS_PATH_MAX];
100 char *path, *p; 76 char *path, *p;
101 77
102 path = getenv("PATH"); 78 path = getenv("PATH");
103 if (!path) 79 if (!path)
104 return NULL; 80 return NULL;
105 81
106 path = xstrdup(path); 82 path = xstrdup(path);
107 while ((p = strrchr(path, ':')) != NULL) { 83 while ((p = strrchr(path, ':')) != NULL) {
108 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname); 84 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
109 *p = 0; 85 *p = 0;
110 if (access(fullpath, R_OK) != (-1)) { 86 if (access(fullpath, R_OK) != -1) {
111 free(path); 87 free(path);
112 return (char *) fullpath; 88 return fullpath;
113 } 89 }
114 } 90 }
115 free(path); 91 free(path);
116 return NULL; 92 return NULL;
117} 93}
122 regex_t preg; 98 regex_t preg;
123 int ret; 99 int ret;
124 100
125 if ((match == NULL) || (regex == NULL)) 101 if ((match == NULL) || (regex == NULL))
126 return EXIT_FAILURE; 102 return EXIT_FAILURE;
127
128 103
129 if ((ret = regcomp(&preg, regex, cflags))) { 104 if ((ret = regcomp(&preg, regex, cflags))) {
130 char err[256]; 105 char err[256];
131 106
132 if (regerror(ret, &preg, err, sizeof(err))) 107 if (regerror(ret, &preg, err, sizeof(err)))
144 119
145/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
146static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
147{ 122{
148 /* 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
149#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
150 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
151 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
152 /* debug sections */ \
153 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
154 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
155 /* runtime sections */ \
156 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
157 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
158 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
159 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
160 } else { \ 138 } else \
161 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
162 } \
163 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
164 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
165 } else { \ 144 } else \
166 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
167 } \
168 } 146 }
169 GET_SYMTABS(32) 147 GET_SYMTABS(32)
170 GET_SYMTABS(64) 148 GET_SYMTABS(64)
171} 149}
172 150
201 } \ 179 } \
202 } 180 }
203 SHOW_PAX(32) 181 SHOW_PAX(32)
204 SHOW_PAX(64) 182 SHOW_PAX(64)
205 } 183 }
206
207 184
208 if (fix_elf && setpax) { 185 if (fix_elf && setpax) {
209 /* set the chpax settings */ 186 /* set the chpax settings */
210 if (elf->elf_class == ELFCLASS32) { 187 if (elf->elf_class == ELFCLASS32) {
211 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)
270 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 247 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
271 found = found_relro; \ 248 found = found_relro; \
272 offset = 4; \ 249 offset = 4; \
273 check_flags = PF_X; \ 250 check_flags = PF_X; \
274 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 251 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
275 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) \
276 if (multi_load++ > max_pt_load) \ 253 if (multi_load++ > max_pt_load) \
277 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); \
278 if (file_matches_list(elf->filename, qa_wx_load)) \ 255 if (file_matches_list(elf->filename, qa_wx_load)) \
279 continue; \ 256 continue; \
280 found = found_load; \ 257 found = found_load; \
297 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
298 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
299 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
300 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
301 char *str; \ 278 char *str; \
302 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
303 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
304 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
305 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
306 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
307 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
338 return NULL; 315 return NULL;
339 else 316 else
340 return ret; 317 return ret;
341} 318}
342 319
320/*
321 * See if this ELF contains a DT_TEXTREL tag in any of its
322 * PT_DYNAMIC sections.
323 */
343static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 324static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
344{ 325{
345 static const char *ret = "TEXTREL"; 326 static const char *ret = "TEXTREL";
346 unsigned long i; 327 unsigned long i;
347 328
355 Elf ## B ## _Dyn *dyn; \ 336 Elf ## B ## _Dyn *dyn; \
356 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 337 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
357 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 338 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
358 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
359 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
360 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 341 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
361 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
362 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
363 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
364 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
365 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 346 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
366 *found_textrel = 1; \ 347 *found_textrel = 1; \
367 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
368 return (be_wewy_wewy_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
378 return NULL; 359 return NULL;
379 else 360 else
380 return " - "; 361 return " - ";
381} 362}
382 363
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 */
383static 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)
384{ 370{
385 unsigned long s, r, rmax; 371 unsigned long s, r, rmax;
386 void *symtab_void, *strtab_void, *text_void; 372 void *symtab_void, *strtab_void, *text_void;
387 373
408 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
409 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
410 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
411 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
412 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
413 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
414 rela = NULL; \ 400 rela = NULL; \
415 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
416 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
417 rel = NULL; \ 403 rel = NULL; \
418 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
419 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
420 } else \ 406 } else \
421 continue; \ 407 continue; \
422 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
423 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
438 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
439 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
440 } else \ 426 } else \
441 *found_textrels = 1; \ 427 *found_textrels = 1; \
442 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
443 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
444 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
445 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
446 continue; \ 432 continue; \
447 } \ 433 } \
448 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
449 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
452 sym = NULL; \ 438 sym = NULL; \
453 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
454 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
455 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
456 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
457 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)); \
458 else \ 444 else \
459 printf("(memory/data?)"); \ 445 printf("(memory/data?)"); \
460 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
461 /* 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 */ \
462 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
463 func = NULL; \ 449 func = NULL; \
464 offset_tmp = 0; \ 450 offset_tmp = 0; \
465 while (sym_max--) { \ 451 while (sym_max--) { \
466 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) { \
467 func = sym; \ 453 func = sym; \
478 printf("%s", func_name); \ 464 printf("%s", func_name); \
479 } else \ 465 } else \
480 printf("(optimized out)"); \ 466 printf("(optimized out)"); \
481 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 467 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
482 if (be_verbose && has_objdump) { \ 468 if (be_verbose && has_objdump) { \
469 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
483 char *sysbuf; \ 470 char *sysbuf; \
484 size_t syslen; \ 471 size_t syslen; \
472 int sysret; \
485 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"; \
486 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \ 474 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
487 sysbuf = xmalloc(syslen); \ 475 sysbuf = xmalloc(syslen); \
488 if (sysbuf) { \
489 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
490 if (end_addr < r_offset) \ 476 if (end_addr < r_offset) \
491 /* not uncommon when things are optimized out */ \ 477 /* not uncommon when things are optimized out */ \
492 end_addr = r_offset + 0x100; \ 478 end_addr = r_offset + 0x100; \
493 snprintf(sysbuf, syslen, sysfmt, \ 479 snprintf(sysbuf, syslen, sysfmt, \
494 (unsigned long)offset_tmp, \ 480 (unsigned long)offset_tmp, \
495 (unsigned long)end_addr, \ 481 (unsigned long)end_addr, \
496 elf->filename, \ 482 elf->filename, \
497 (unsigned long)r_offset); \ 483 (unsigned long)r_offset); \
498 fflush(stdout); \ 484 fflush(stdout); \
499 system(sysbuf); \ 485 sysret = system(sysbuf); \
500 fflush(stdout); \ 486 fflush(stdout); \
501 free(sysbuf); \ 487 free(sysbuf); \
502 } \
503 } \ 488 } \
504 } \ 489 } \
505 } } 490 } }
506 SHOW_TEXTRELS(32) 491 SHOW_TEXTRELS(32)
507 SHOW_TEXTRELS(64) 492 SHOW_TEXTRELS(64)
510 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);
511 496
512 return NULL; 497 return NULL;
513} 498}
514 499
515static void rpath_security_checks(elfobj *, char *, const char *);
516static 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)
517{ 501{
518 struct stat st; 502 struct stat st;
519 switch (*item) { 503 switch (*item) {
520 case '/': break; 504 case '/': break;
536 break; 520 break;
537 } 521 }
538} 522}
539static 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)
540{ 524{
541 unsigned long i, s; 525 unsigned long i;
542 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
543 void *strtbl_void; 527 void *strtbl_void;
544 528
545 if (!show_rpath) return; 529 if (!show_rpath) return;
546 530
557 Elf ## B ## _Off offset; \ 541 Elf ## B ## _Off offset; \
558 Elf ## B ## _Xword word; \ 542 Elf ## B ## _Xword word; \
559 /* Scan all the program headers */ \ 543 /* Scan all the program headers */ \
560 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 544 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
561 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
562 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; \
563 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
564 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
565 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
566 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
567 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
568 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
569 r = &rpath; \ 553 r = &rpath; \
570 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
571 r = &runpath; \ 555 r = &runpath; \
575 } \ 559 } \
576 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
577 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
578 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
579 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
580 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
581 /* 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 */ \
582 if (fix_elf) \ 566 if (fix_elf) \
583 offset = strlen(*r); \ 567 offset = strlen(*r); \
584 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
585 if (be_quiet) { \ 569 if (be_quiet) { \
591 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
592 while (start) { \ 576 while (start) { \
593 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
594 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
595 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
596 if (use_ldcache) \ 580 if (use_ldcache) { \
597 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
598 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
599 *r = end; \ 585 *r = end; \
600 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
601 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
602 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
603 (*r)++; \ 589 (*r)++; \
604 break; \ 590 break; \
605 } \ 591 } \
592 } \
606 if (!*r || !end) \ 593 if (!*r || !end) \
607 break; \ 594 break; \
608 else \ 595 else \
609 start = start + len + 1; \ 596 start = start + len + 1; \
610 } \ 597 } \
695#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
696#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
697#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
698#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
699 686
700static char *lookup_cache_lib(elfobj *, char *);
701
702#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
703 688
704static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
705{ 690{
706 int fd = 0; 691 int fd;
707 char *strs; 692 char *strs;
708 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
709 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
710 struct stat st; 695 struct stat st;
711 696
712 typedef struct { 697 typedef struct {
713 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
714 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
724 libentry_t *libent; 709 libentry_t *libent;
725 710
726 if (fname == NULL) 711 if (fname == NULL)
727 return NULL; 712 return NULL;
728 713
729 if (ldcache == 0) { 714 if (ldcache == NULL) {
730 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)
731 return NULL; 720 return NULL;
732 721
733 /* 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 */
734 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
735 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
736
737 close(fd); 725 close(fd);
738 726
739 if (ldcache == (caddr_t)-1) { 727 if (ldcache == MAP_FAILED) {
740 ldcache = 0; 728 ldcache = NULL;
741 return NULL; 729 return NULL;
742 } 730 }
743 731
744 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;
745 return NULL; 737 return NULL;
746 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
747 return NULL;
748 } 738 }
739 } else
740 header = ldcache;
749 741
750 header = (header_t *) ldcache;
751 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
752 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
753 744
754 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
755 /* 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
756 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
757 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
758 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
759 continue; 751 continue;
760 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
761 continue; 753 continue;
762 754
763 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
764 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
765 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
766 } 761 }
762
767 return buf; 763 return buf;
768} 764}
765
769#elif defined(__NetBSD__) 766#elif defined(__NetBSD__)
770static char *lookup_cache_lib(elfobj *elf, char *fname) 767static char *lookup_cache_lib(elfobj *elf, char *fname)
771{ 768{
772 static char buf[__PAX_UTILS_PATH_MAX] = ""; 769 static char buf[__PAX_UTILS_PATH_MAX] = "";
773 static struct stat st; 770 static struct stat st;
774 771 size_t n;
775 char **ldpath; 772 char *ldpath;
776 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 773
774 array_for_each(ldpath, n, ldpath) {
777 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))
778 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 */
779 777
780 if (stat(buf, &st) != 0) 778 if (stat(buf, &st) != 0)
781 continue; /* if the lib doesn't exist in *ldpath, look further */ 779 continue; /* if the lib doesn't exist in *ldpath, look further */
782 780
790 788
791 /* not found in any path */ 789 /* not found in any path */
792 return NULL; 790 return NULL;
793} 791}
794#else 792#else
793#ifdef __ELF__
795#warning Cache support not implemented for your target 794#warning Cache support not implemented for your target
795#endif
796static char *lookup_cache_lib(elfobj *elf, char *fname) 796static char *lookup_cache_lib(elfobj *elf, char *fname)
797{ 797{
798 return NULL; 798 return NULL;
799} 799}
800#endif 800#endif
804 unsigned long i; 804 unsigned long i;
805 char *needed; 805 char *needed;
806 void *strtbl_void; 806 void *strtbl_void;
807 char *p; 807 char *p;
808 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
809 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
810 815
811 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
812 817
813 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
814#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
816 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
817 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
818 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
819 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
820 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 */ \
821 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
822 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; \
823 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
824 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 */ \
825 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
826 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
827 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
828 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
829 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
830 ++dyn; \ 840 ++dyn; \
831 continue; \ 841 continue; \
832 } \ 842 } \
833 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
834 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
835 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
836 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
837 if (use_ldcache) \ 848 if (use_ldcache) \
838 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
839 needed = p; \ 850 needed = p; \
840 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
841 } \ 852 } \
842 *found_needed = 1; \ 853 *found_needed = 1; \
843 } else { \ 854 } else { \
844 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)) { \
845 *found_lib = 1; \ 864 *found_lib = 1; \
846 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
847 } \ 866 } \
848 } \ 867 } \
849 } \ 868 } \
850 ++dyn; \ 869 ++dyn; \
851 } \ 870 } \
892 Elf ## B ## _Dyn *dyn; \ 911 Elf ## B ## _Dyn *dyn; \
893 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 912 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
894 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 913 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
895 Elf ## B ## _Off offset; \ 914 Elf ## B ## _Off offset; \
896 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
897 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; \
898 dynamic = 1; \ 917 dynamic = 1; \
899 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
900 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
901 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
902 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
903 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
904 (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)) \
905 { \ 924 { \
906 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
919 /* 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 */
920 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))))) {
921 return NULL; 940 return NULL;
922 } else { 941 } else {
923 *found_bind = 1; 942 *found_bind = 1;
924 return (char *) (dynamic ? "LAZY" : "STATIC"); 943 return (char *)(dynamic ? "LAZY" : "STATIC");
925 } 944 }
926} 945}
927static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
928{ 947{
929 unsigned long i; 948 unsigned long i;
941 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 960 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
942 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 961 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
943 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 962 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
944 Elf ## B ## _Off offset; \ 963 Elf ## B ## _Off offset; \
945 /* only look for soname in shared objects */ \ 964 /* only look for soname in shared objects */ \
946 if (ehdr->e_type != ET_DYN) \ 965 if (EGET(ehdr->e_type) != ET_DYN) \
947 return NULL; \ 966 return NULL; \
948 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
949 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; \
950 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
951 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
952 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
953 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
954 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
955 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
956 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
957 ++dyn; \ 976 ++dyn; \
958 continue; \ 977 continue; \
959 } \ 978 } \
960 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
961 *found_soname = 1; \ 980 *found_soname = 1; \
962 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
963 } \ 982 } \
964 ++dyn; \ 983 ++dyn; \
965 } \ 984 } \
969 } 988 }
970 989
971 return NULL; 990 return NULL;
972} 991}
973 992
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
974static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
975{ 1161{
976 unsigned long i; 1162 unsigned long i;
977 char *ret; 1163 char *ret;
978 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
979 1165
980 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
981 ret = find_sym; 1167 ret = NULL;
982 1168
983 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
984 1170
985 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
986#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
987 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
988 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
989 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
990 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)); \
991 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
992 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
993 if (cnt) \ 1180 if (cnt) \
994 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
995 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 } \
996 if (sym->st_name) { \ 1187 if (sym->st_name) { \
997 /* make sure the symbol name is in acceptable memory range */ \ 1188 /* make sure the symbol name is in acceptable memory range */ \
998 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
999 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
1000 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
1001 ++sym; \ 1192 ++sym; \
1002 continue; \ 1193 continue; \
1003 } \ 1194 } \
1004 /* debug display ... show all symbols and some extra info */ \ 1195 scanelf_match_symname(elf, found_sym, \
1005 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \ 1196 &ret, &ret_len, symname, \
1006 printf("%s(%s) %5lX %15s %s %s\n", \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
1007 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
1008 elf->base_filename, \ 1199 EGET(sym->st_shndx), \
1009 (unsigned long)sym->st_size, \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
1010 get_elfstttype(sym->st_info), \ 1201 EGET(sym->st_size)); \
1011 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1012 *found_sym = 1; \
1013 } else { \
1014 /* allow the user to specify a comma delimited list of symbols to search for */ \
1015 char *this_sym, *this_sym_ver, *next_sym; \
1016 this_sym = ret; \
1017 this_sym_ver = versioned_symname; \
1018 do { \
1019 next_sym = strchr(this_sym, ','); \
1020 if (next_sym == NULL) \
1021 next_sym = this_sym + strlen(this_sym); \
1022 /* do we want a defined symbol ? */ \
1023 if (*this_sym == '+') { \
1024 if (sym->st_shndx == SHN_UNDEF) \
1025 goto skip_this_sym##B; \
1026 ++this_sym; \
1027 ++this_sym_ver; \
1028 /* do we want an undefined symbol ? */ \
1029 } else if (*this_sym == '-') { \
1030 if (sym->st_shndx != SHN_UNDEF) \
1031 goto skip_this_sym##B; \
1032 ++this_sym; \
1033 ++this_sym_ver; \
1034 } \
1035 /* ok, lets compare the name now */ \
1036 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
1037 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
1038 if (be_semi_verbose) { \
1039 char buf[126]; \
1040 snprintf(buf, sizeof(buf), "%lX %s %s", \
1041 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1042 ret = buf; \
1043 } else \
1044 ret = this_sym; \
1045 (*found_sym)++; \
1046 goto break_out; \
1047 } \
1048 skip_this_sym##B: this_sym = next_sym + 1; \
1049 } while (*next_sym != '\0'); \
1050 } \
1051 } \ 1202 } \
1052 ++sym; \ 1203 ++sym; \
1053 } } 1204 } }
1054 FIND_SYM(32) 1205 FIND_SYM(32)
1055 FIND_SYM(64) 1206 FIND_SYM(64)
1061 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
1062 return ret; 1213 return ret;
1063 if (be_quiet) 1214 if (be_quiet)
1064 return NULL; 1215 return NULL;
1065 else 1216 else
1066 return (char *)" - "; 1217 return " - ";
1067} 1218}
1068 1219
1069
1070static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1071{ 1221{
1072 if (!find_section) 1222 if (!find_section)
1073 return NULL; 1223 return NULL;
1074 1224
1075#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
1076 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1077 int invert; \ 1228 int invert; \
1229 const char *section_name; \
1078 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1079 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
1080 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1081 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)) \
1082 *found_section = 1; \ 1241 *found_section = 1; \
1083 } 1242 }
1084 FIND_SECTION(32) 1243 FIND_SECTION(32)
1085 FIND_SECTION(64) 1244 FIND_SECTION(64)
1086 1245
1091 return find_section; 1250 return find_section;
1092 1251
1093 if (be_quiet) 1252 if (be_quiet)
1094 return NULL; 1253 return NULL;
1095 else 1254 else
1096 return (char *)" - "; 1255 return " - ";
1097} 1256}
1098 1257
1099/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1100#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1101static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1102{ 1261{
1103 unsigned long i; 1262 unsigned long i;
1104 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1105 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
1119 printf("%s: scanning file\n", elf->filename); 1278 printf("%s: scanning file\n", elf->filename);
1120 1279
1121 /* init output buffer */ 1280 /* init output buffer */
1122 if (!out_buffer) { 1281 if (!out_buffer) {
1123 out_len = sizeof(char) * 80; 1282 out_len = sizeof(char) * 80;
1124 out_buffer = (char*)xmalloc(out_len); 1283 out_buffer = xmalloc(out_len);
1125 } 1284 }
1126 *out_buffer = '\0'; 1285 *out_buffer = '\0';
1127 1286
1128 /* show the header */ 1287 /* show the header */
1129 if (!be_quiet && show_banner) { 1288 if (!be_quiet && show_banner) {
1144 case 'r': prints("RPATH "); break; 1303 case 'r': prints("RPATH "); break;
1145 case 'M': prints("CLASS "); break; 1304 case 'M': prints("CLASS "); break;
1146 case 'n': prints("NEEDED "); break; 1305 case 'n': prints("NEEDED "); break;
1147 case 'i': prints("INTERP "); break; 1306 case 'i': prints("INTERP "); break;
1148 case 'b': prints("BIND "); break; 1307 case 'b': prints("BIND "); break;
1308 case 'Z': prints("SIZE "); break;
1149 case 'S': prints("SONAME "); break; 1309 case 'S': prints("SONAME "); break;
1150 case 's': prints("SYM "); break; 1310 case 's': prints("SYM "); break;
1151 case 'N': prints("LIB "); break; 1311 case 'N': prints("LIB "); break;
1152 case 'T': prints("TEXTRELS "); break; 1312 case 'T': prints("TEXTRELS "); break;
1153 case 'k': prints("SECTION "); break; 1313 case 'k': prints("SECTION "); break;
1154 case 'a': prints("ARCH "); break; 1314 case 'a': prints("ARCH "); break;
1315 case 'I': prints("OSABI "); break;
1316 case 'Y': prints("EABI "); break;
1155 case 'O': prints("PERM "); break; 1317 case 'O': prints("PERM "); break;
1318 case 'D': prints("ENDIAN "); break;
1156 default: warnf("'%c' has no title ?", out_format[i]); 1319 default: warnf("'%c' has no title ?", out_format[i]);
1157 } 1320 }
1158 } 1321 }
1159 if (!found_file) prints("FILE "); 1322 if (!found_file) prints("FILE ");
1160 prints("\n"); 1323 prints("\n");
1164 1327
1165 /* dump all the good stuff */ 1328 /* dump all the good stuff */
1166 for (i = 0; out_format[i]; ++i) { 1329 for (i = 0; out_format[i]; ++i) {
1167 const char *out; 1330 const char *out;
1168 const char *tmp; 1331 const char *tmp;
1169 1332 static char ubuf[sizeof(unsigned long)*2];
1170 if (!IS_MODIFIER(out_format[i])) { 1333 if (!IS_MODIFIER(out_format[i])) {
1171 xchrcat(&out_buffer, out_format[i], &out_len); 1334 xchrcat(&out_buffer, out_format[i], &out_len);
1172 continue; 1335 continue;
1173 } 1336 }
1174 1337
1211 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;
1212 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1213 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;
1214 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;
1215 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;
1216 case 'O': out = getstr_perms(elf->filename); break; 1380 case 'O': out = strfileperms(elf->filename); break;
1217 case 'n': 1381 case 'n':
1218 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;
1219 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1220 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1221 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1222 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1386 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1223 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1387 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1224 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;;
1225 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1226 } 1393 }
1227 if (out) { 1394 if (out)
1228 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1229 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1230 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1231 else
1232 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1233 }
1234 } 1396 }
1235 1397
1236#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1237 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1238 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1270 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1271 goto label_done; 1433 goto label_done;
1272 break; 1434 break;
1273 default: break; 1435 default: break;
1274 } 1436 }
1275 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1276 char sbuf[126]; 1438 char sbuf[126];
1277 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1278 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1279 char *p; 1441 char *p;
1280 while((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1281 *p = 0; 1443 *p = 0;
1282 if (etype_lookup(p+1) == get_etype(elf)) 1444 if (etype_lookup(p+1) == get_etype(elf))
1283 goto label_ret; 1445 goto label_ret;
1284 } 1446 }
1285 } 1447 }
1305 1467
1306 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1307 if (ar == NULL) 1469 if (ar == NULL)
1308 return 1; 1470 return 1;
1309 1471
1310 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);
1311 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");
1312 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);
1313 if (elf) { 1478 if (elf) {
1314 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1315 unreadelf(elf); 1480 unreadelf(elf);
1316 } 1481 }
1317 } 1482 }
1351 1516
1352 close(fd); 1517 close(fd);
1353 return 0; 1518 return 0;
1354} 1519}
1355 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
1356/* 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 */
1357static int scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1358{ 1533{
1359 register DIR *dir; 1534 register DIR *dir;
1360 register struct dirent *dentry; 1535 register struct dirent *dentry;
1361 struct stat st_top, st; 1536 struct stat st_top, st;
1362 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1363 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1364 int ret = 0; 1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1365 1543
1366 /* make sure path exists */ 1544 /* make sure path exists */
1367 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1368 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1369 return 1; 1547 return 1;
1433static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1434{ 1612{
1435 FILE *fp = NULL; 1613 FILE *fp = NULL;
1436 char *p; 1614 char *p;
1437 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1438 1617
1439 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1440 return i;
1441 1619
1442 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1443 return i; 1621 return i;
1444 1622
1445 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1446 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1447 *p = 0; 1625 *p = 0;
1448 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1449 *p = 0; 1627 *p = 0;
1450#ifdef __linux__ 1628
1451 // recursive includes of the same file will make this segfault. 1629 /* recursive includes of the same file will make this segfault. */
1452 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1453 glob64_t gl; 1631 glob_t gl;
1454 size_t x; 1632 size_t x;
1455 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1456 1634
1457 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1458 1638
1459 if (path[8] != '/') 1639 if (path[8] != '/')
1460 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1461 else 1641 else
1462 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1463 1643
1464 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1465 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1466 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1467 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1468 continue; 1648 continue;
1469 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1470 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1471 globfree64(&gl);
1472 return i;
1473 }
1474 } 1650 }
1475 globfree64 (&gl); 1651 globfree(&gl);
1476 continue; 1652 continue;
1477 } 1653 }
1478 } 1654 }
1479#endif 1655
1480 if (*path != '/') 1656 if (*path != '/')
1481 continue; 1657 continue;
1482 1658
1483 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1484
1485 if (i + 1 == ARRAY_SIZE(ldpaths))
1486 break;
1487 } 1660 }
1488 ldpaths[i] = NULL;
1489 1661
1490 fclose(fp); 1662 fclose(fp);
1491 return i; 1663 return i;
1492} 1664}
1493 1665
1494#elif defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1495 1667
1496static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1497{ 1669{
1498 FILE *fp = NULL; 1670 FILE *fp = NULL;
1499 char *b = NULL, *p; 1671 char *b = NULL, *p;
1500 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1501 1674
1502 if (i + 1 == ARRAY_SIZE(ldpaths)) 1675 fname = maybe_add_root(fname, _fname);
1503 return i;
1504 1676
1505 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1506 return i; 1678 return i;
1507 1679
1508 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1511 { 1683 {
1512 fclose(fp); 1684 fclose(fp);
1513 return i; 1685 return i;
1514 } 1686 }
1515 1687
1516 b = (char*)malloc(hdr.dirlistlen+1); 1688 b = xmalloc(hdr.dirlistlen + 1);
1517 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) { 1689 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1518 fclose(fp); 1690 fclose(fp);
1519 free(b); 1691 free(b);
1520 return i; 1692 return i;
1521 } 1693 }
1522 1694
1523 while ((p = strsep(&b, ":"))) { 1695 while ((p = strsep(&b, ":"))) {
1524 if (*p == '\0') continue; 1696 if (*p == '\0')
1525 ldpaths[i++] = xstrdup(p); 1697 continue;
1526 1698 xarraypush(ldpaths, p, strlen(p));
1527 if (i + 1 == ARRAY_SIZE(ldpaths))
1528 break;
1529 } 1699 }
1530 ldpaths[i] = NULL;
1531 1700
1532 free(b); 1701 free(b);
1533 fclose(fp); 1702 fclose(fp);
1534 return i; 1703 return i;
1535} 1704}
1536 1705
1537#else 1706#else
1538 1707#ifdef __ELF__
1539#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1709#endif
1540static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1541{ 1711{
1542 memset(ldpaths, 0x00, sizeof(ldpaths)); 1712 return 0;
1543} 1713}
1544
1545#endif 1714#endif
1546 1715
1547/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1548static void scanelf_ldpath() 1717static void scanelf_ldpath(void)
1549{ 1718{
1550 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1551 int i = 0; 1722 int i = 0;
1552 1723
1553 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1554 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1555 1726
1556 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1557 1728
1558 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1559 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1560 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1561 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1562 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1563 ++i; 1734 ++i;
1564 } 1735 }
1565 1736
1566 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1567 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1568 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1739 if (!scan_ull) scanelf_dir("/usr/local/lib");
1569} 1740}
1570 1741
1571/* scan env PATH for paths */ 1742/* scan env PATH for paths */
1572static void scanelf_envpath() 1743static void scanelf_envpath(void)
1573{ 1744{
1574 char *path, *p; 1745 char *path, *p;
1575 1746
1576 path = getenv("PATH"); 1747 path = getenv("PATH");
1577 if (!path) 1748 if (!path)
1584 } 1755 }
1585 1756
1586 free(path); 1757 free(path);
1587} 1758}
1588 1759
1589/* usage / invocation handling functions */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1590#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:O:BhV" 1761#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZCBhV"
1591#define a_argument required_argument 1762#define a_argument required_argument
1592static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1593 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1594 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1595 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1596 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1597 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1598 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1599 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1612 {"lib", a_argument, NULL, 'N'}, 1784 {"lib", a_argument, NULL, 'N'},
1613 {"gmatch", no_argument, NULL, 'g'}, 1785 {"gmatch", no_argument, NULL, 'g'},
1614 {"textrels", no_argument, NULL, 'T'}, 1786 {"textrels", no_argument, NULL, 'T'},
1615 {"etype", a_argument, NULL, 'E'}, 1787 {"etype", a_argument, NULL, 'E'},
1616 {"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'},
1617 {"perms", a_argument, NULL, 'O'}, 1792 {"perms", a_argument, NULL, 'O'},
1793 {"size", no_argument, NULL, 'Z'},
1618 {"all", no_argument, NULL, 'a'}, 1794 {"all", no_argument, NULL, 'a'},
1619 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1620 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1621 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1622 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1623 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1624 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1625 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1626 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1627 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1628}; 1805};
1629 1806
1630static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1631 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1632 "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)",
1633 "Scan directories recursively", 1811 "Scan directories recursively",
1634 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1635 "Don't scan symlinks", 1813 "Don't scan symlinks",
1636 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1637 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1646 "Print BIND information", 1824 "Print BIND information",
1647 "Print SONAME information", 1825 "Print SONAME information",
1648 "Find a specified symbol", 1826 "Find a specified symbol",
1649 "Find a specified section", 1827 "Find a specified section",
1650 "Find a specified library", 1828 "Find a specified library",
1651 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1652 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1653 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1654 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1833 "Print Endianness",
1834 "Print OSABI",
1835 "Print EABI (EM_ARM Only)",
1655 "Print only ELF files matching octal permissions", 1836 "Print only ELF files matching octal permissions",
1656 "Print all scanned info (-x -e -t -r -b)\n", 1837 "Print ELF file size",
1838 "Print all useful/simple info\n",
1657 "Only output 'bad' things", 1839 "Only output 'bad' things",
1658 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1659 "Use specified format for output", 1841 "Use specified format for output",
1660 "Read input stream from a filename", 1842 "Read input stream from a filename",
1661 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1662 "Don't display the header", 1845 "Don't display the header",
1663 "Print this help and exit", 1846 "Print this help and exit",
1664 "Print version and exit", 1847 "Print version and exit",
1665 NULL 1848 NULL
1666}; 1849};
1673 "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);
1674 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1675 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1676 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1677 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",
1678 long_opts[i].name, opts_help[i]); 1864 long_opts[i].name, opts_help[i]);
1679 else 1865 else
1680 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1681 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1682 1868
1713 case 'f': 1899 case 'f':
1714 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");
1715 from_file = optarg; 1901 from_file = optarg;
1716 break; 1902 break;
1717 case 'E': 1903 case 'E':
1718 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1719 break; 1905 break;
1720 case 'M': 1906 case 'M':
1721 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 }
1722 break; 1914 break;
1723 case 'O': 1915 case 'O':
1724 if (sscanf(optarg, "%o", &match_perms) == (-1)) 1916 if (sscanf(optarg, "%o", &match_perms) == -1)
1725 match_bits = 0; 1917 match_bits = 0;
1726 break; 1918 break;
1727 case 'o': { 1919 case 'o': {
1728 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1729 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1730 break; 1922 break;
1731 } 1923 }
1732 case 'k': 1924 case 'k':
1733 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1734 find_section = optarg;
1735 break; 1926 break;
1736 case 's': { 1927 case 's': {
1737 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");
1738 find_sym = optarg; 1929 find_sym = optarg;
1739 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1740 sprintf(versioned_symname, "%s@", find_sym);
1741 break; 1930 break;
1742 } 1931 }
1743 case 'N': { 1932 case 'N':
1744 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1745 find_lib = optarg;
1746 break; 1934 break;
1747 }
1748
1749 case 'F': { 1935 case 'F': {
1750 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");
1751 out_format = optarg; 1937 out_format = optarg;
1752 break; 1938 break;
1753 } 1939 }
1754 case 'z': { 1940 case 'z': {
1755 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1941 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1756 size_t x; 1942 size_t x;
1757 1943
1758 for (x = 0 ; x < strlen(optarg); x++) { 1944 for (x = 0; x < strlen(optarg); x++) {
1759 switch(optarg[x]) { 1945 switch (optarg[x]) {
1760 case 'p': 1946 case 'p':
1761 case 'P': 1947 case 'P':
1762 do_pax_state(optarg[x], PAGEEXEC); 1948 do_pax_state(optarg[x], PAGEEXEC);
1763 break; 1949 break;
1764 case 's': 1950 case 's':
1792 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1978 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1793 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1979 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1794 setpax = flags; 1980 setpax = flags;
1795 break; 1981 break;
1796 } 1982 }
1983 case 'Z': show_size = 1; break;
1797 case 'g': g_match = 1; break; 1984 case 'g': g_match = 1; break;
1798 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1799 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1800 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1801 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1802 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1803 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1804 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1805 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1813 case 'b': show_bind = 1; break; 2001 case 'b': show_bind = 1; break;
1814 case 'S': show_soname = 1; break; 2002 case 'S': show_soname = 1; break;
1815 case 'T': show_textrels = 1; break; 2003 case 'T': show_textrels = 1; break;
1816 case 'q': be_quiet = 1; break; 2004 case 'q': be_quiet = 1; break;
1817 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1818 case 'a': show_perms = 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;
1819 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;
1820 case ':': 2013 case ':':
1821 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1822 case '?': 2015 case '?':
1823 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1824 default: 2017 default:
1827 } 2020 }
1828 if (show_textrels && be_verbose) { 2021 if (show_textrels && be_verbose) {
1829 if (which("objdump") != NULL) 2022 if (which("objdump") != NULL)
1830 has_objdump = 1; 2023 has_objdump = 1;
1831 } 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);
1832 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1833 if (out_format) { 2031 if (out_format) {
1834 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1835 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1836 show_textrels = show_perms = 0; 2034 show_textrels = show_perms = show_endian = show_size = \
2035 show_osabi = show_eabi = 0;
1837 for (i = 0; out_format[i]; ++i) { 2036 for (i = 0; out_format[i]; ++i) {
1838 if (!IS_MODIFIER(out_format[i])) continue; 2037 if (!IS_MODIFIER(out_format[i])) continue;
1839 2038
1840 switch (out_format[++i]) { 2039 switch (out_format[++i]) {
1841 case '+': break; 2040 case '+': break;
1848 case 's': break; 2047 case 's': break;
1849 case 'N': break; 2048 case 'N': break;
1850 case 'o': break; 2049 case 'o': break;
1851 case 'a': break; 2050 case 'a': break;
1852 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;
1853 case 'O': show_perms = 1; break; 2056 case 'O': show_perms = 1; break;
1854 case 'x': show_pax = 1; break; 2057 case 'x': show_pax = 1; break;
1855 case 'e': show_phdr = 1; break; 2058 case 'e': show_phdr = 1; break;
1856 case 't': show_textrel = 1; break; 2059 case 't': show_textrel = 1; break;
1857 case 'r': show_rpath = 1; break; 2060 case 'r': show_rpath = 1; break;
1867 } 2070 }
1868 2071
1869 /* construct our default format */ 2072 /* construct our default format */
1870 } else { 2073 } else {
1871 size_t fmt_len = 30; 2074 size_t fmt_len = 30;
1872 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2075 out_format = xmalloc(sizeof(char) * fmt_len);
2076 *out_format = '\0';
1873 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2077 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1874 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 2078 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1875 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);
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);
1876 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2084 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1877 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2085 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1878 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2086 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1879 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2087 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1880 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2088 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1905 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1906 ret = scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1907 } 2115 }
1908 2116
1909 /* clean up */ 2117 /* clean up */
1910 free(versioned_symname);
1911 for (i = 0; ldpaths[i]; ++i)
1912 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1913 2123
1914 if (ldcache != 0) 2124 if (ldcache != 0)
1915 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1916 return ret; 2126 return ret;
1917} 2127}
1947 2157
1948 /* 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
1949 * the envvals array of strings */ 2159 * the envvals array of strings */
1950 return envvals; 2160 return envvals;
1951} 2161}
2162
1952static void parseenv() 2163static void parseenv(void)
1953{ 2164{
2165 color_init(false);
1954 qa_textrels = get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
1955 qa_execstack = get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
1956 qa_wx_load = get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
1957} 2169}
1958 2170
1959#ifdef __PAX_UTILS_CLEANUP 2171#ifdef __PAX_UTILS_CLEANUP
1960static void cleanup() 2172static void cleanup(void)
1961{ 2173{
1962 free(out_format); 2174 free(out_format);
1963 free(qa_textrels); 2175 free(qa_textrels);
1964 free(qa_execstack); 2176 free(qa_execstack);
1965 free(qa_wx_load); 2177 free(qa_wx_load);
1966} 2178}
1967#endif 2179#endif
1968
1969 2180
1970int main(int argc, char *argv[]) 2181int main(int argc, char *argv[])
1971{ 2182{
1972 int ret; 2183 int ret;
1973 if (argc < 2) 2184 if (argc < 2)
1982 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD"); 2193 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1983#endif 2194#endif
1984 return ret; 2195 return ret;
1985} 2196}
1986 2197
1987
1988
1989/* utility funcs */
1990static char *xstrdup(const char *s)
1991{
1992 char *ret = strdup(s);
1993 if (!ret) err("Could not strdup(): %s", strerror(errno));
1994 return ret;
1995}
1996static void *xmalloc(size_t size)
1997{
1998 void *ret = malloc(size);
1999 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
2000 return ret;
2001}
2002static void *xrealloc(void *ptr, size_t size)
2003{
2004 void *ret = realloc(ptr, size);
2005 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
2006 return ret;
2007}
2008static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
2009{
2010 size_t new_len;
2011
2012 new_len = strlen(*dst) + strlen(src);
2013 if (*curr_len <= new_len) {
2014 *curr_len = new_len + (*curr_len / 2);
2015 *dst = realloc(*dst, *curr_len);
2016 if (!*dst)
2017 err("could not realloc() %li bytes", (unsigned long)*curr_len);
2018 }
2019
2020 if (n)
2021 strncat(*dst, src, n);
2022 else
2023 strcat(*dst, src);
2024}
2025static inline void xchrcat(char **dst, const char append, size_t *curr_len)
2026{
2027 static char my_app[2];
2028 my_app[0] = append;
2029 my_app[1] = '\0';
2030 xstrcat(dst, my_app, curr_len);
2031}
2032
2033/* Match filename against entries in matchlist, return TRUE 2198/* Match filename against entries in matchlist, return TRUE
2034 * if the file is listed */ 2199 * if the file is listed */
2035static int file_matches_list(const char *filename, char **matchlist) 2200static int file_matches_list(const char *filename, char **matchlist)
2036{ 2201{
2037 char **file; 2202 char **file;

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