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

Diff of /pax-utils/scanelf.c

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

Revision 1.170 Revision 1.229
1/* 1/*
2 * Copyright 2003-2006 Gentoo Foundation 2 * Copyright 2003-2007 Gentoo Foundation
3 * Distributed under the terms of the GNU General Public License v2 3 * Distributed under the terms of the GNU General Public License v2
4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.170 2007/01/09 18:46:22 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 2003-2006 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2006 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10static const char *rcsid = "$Id: scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $";
11const char argv0[] = "scanelf";
12
10#include "paxinc.h" 13#include "paxinc.h"
11
12static const char *rcsid = "$Id: scanelf.c,v 1.170 2007/01/09 18:46:22 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);
36 19
37/* variables to control behavior */ 20/* variables to control behavior */
38static char match_etypes[126] = ""; 21static char *match_etypes = NULL;
39static char *ldpaths[256]; 22static array_t _ldpaths = array_init_decl, *ldpaths = &_ldpaths;
40static char scan_ldpath = 0; 23static char scan_ldpath = 0;
41static char scan_envpath = 0; 24static char scan_envpath = 0;
42static char scan_symlink = 1; 25static char scan_symlink = 1;
43static char scan_archives = 0; 26static char scan_archives = 0;
44static char dir_recurse = 0; 27static char dir_recurse = 0;
45static char dir_crossmount = 1; 28static char dir_crossmount = 1;
46static char show_pax = 0; 29static char show_pax = 0;
30static char show_perms = 0;
31static char show_size = 0;
47static char show_phdr = 0; 32static char show_phdr = 0;
48static char show_textrel = 0; 33static char show_textrel = 0;
49static char show_rpath = 0; 34static char show_rpath = 0;
50static char show_needed = 0; 35static char show_needed = 0;
51static char show_interp = 0; 36static char show_interp = 0;
52static char show_bind = 0; 37static char show_bind = 0;
53static char show_soname = 0; 38static char show_soname = 0;
54static char show_textrels = 0; 39static char show_textrels = 0;
55static char show_banner = 1; 40static char show_banner = 1;
41static char show_endian = 0;
42static char show_osabi = 0;
43static char show_eabi = 0;
56static char be_quiet = 0; 44static char be_quiet = 0;
57static char be_verbose = 0; 45static char be_verbose = 0;
58static char be_wewy_wewy_quiet = 0; 46static char be_wewy_wewy_quiet = 0;
59static char be_semi_verbose = 0; 47static char be_semi_verbose = 0;
60static char *find_sym = NULL, *versioned_symname = NULL; 48static char *find_sym = NULL;
61static char *find_lib = NULL; 49static char *find_lib = NULL;
50static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
62static char *find_section = NULL; 51static char *find_section = NULL;
52static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
63static char *out_format = NULL; 53static char *out_format = NULL;
64static char *search_path = NULL; 54static char *search_path = NULL;
65static char fix_elf = 0; 55static char fix_elf = 0;
66static char gmatch = 0; 56static char g_match = 0;
67static char use_ldcache = 0; 57static char use_ldcache = 0;
68 58
69static char **qa_textrels = NULL; 59static char **qa_textrels = NULL;
70static char **qa_execstack = NULL; 60static char **qa_execstack = NULL;
71static char **qa_wx_load = NULL; 61static char **qa_wx_load = NULL;
62static char *root;
72 63
73int match_bits = 0; 64static int match_bits = 0;
74caddr_t ldcache = 0; 65static unsigned int match_perms = 0;
66static void *ldcache = NULL;
75size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
76unsigned long setpax = 0UL; 68static unsigned long setpax = 0UL;
77 69
78int has_objdump = 0; 70static int has_objdump = 0;
79 71
72/* find the path to a file by name */
80static char *which(const char *fname) 73static char *which(const char *fname)
81{ 74{
82 static char fullpath[BUFSIZ]; 75 static char fullpath[__PAX_UTILS_PATH_MAX];
83 char *path, *p; 76 char *path, *p;
84 77
85 memset(fullpath, 0x0, sizeof(fullpath));
86
87 path = getenv("PATH"); 78 path = getenv("PATH");
88 79 if (!path)
89 if (!path)
90 return NULL; 80 return NULL;
91 81
92 path = xstrdup(path); 82 path = xstrdup(path);
93 while ((p = strrchr(path, ':')) != NULL) { 83 while ((p = strrchr(path, ':')) != NULL) {
94 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname); 84 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
95 *p = 0; 85 *p = 0;
96 if (access(fullpath, R_OK) != (-1)) { 86 if (access(fullpath, R_OK) != -1) {
97 free(path); 87 free(path);
98 return (char *) fullpath; 88 return fullpath;
89 }
99 } 90 }
100 } 91 free(path);
101 free(path);
102 return NULL; 92 return NULL;
93}
94
95/* 1 on failure. 0 otherwise */
96static int rematch(const char *regex, const char *match, int cflags)
97{
98 regex_t preg;
99 int ret;
100
101 if ((match == NULL) || (regex == NULL))
102 return EXIT_FAILURE;
103
104 if ((ret = regcomp(&preg, regex, cflags))) {
105 char err[256];
106
107 if (regerror(ret, &preg, err, sizeof(err)))
108 fprintf(stderr, "regcomp failed: %s", err);
109 else
110 fprintf(stderr, "regcomp failed");
111
112 return EXIT_FAILURE;
113 }
114 ret = regexec(&preg, match, 0, NULL, 0);
115 regfree(&preg);
116
117 return ret;
103} 118}
104 119
105/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
106static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
107{ 122{
108 /* 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
109#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
110 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
111 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
112 /* debug sections */ \
113 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
114 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
115 /* runtime sections */ \
116 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
117 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
118 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
119 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
120 } else { \ 138 } else \
121 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
122 } \
123 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
124 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
125 } else { \ 144 } else \
126 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
127 } \
128 } 146 }
129 GET_SYMTABS(32) 147 GET_SYMTABS(32)
130 GET_SYMTABS(64) 148 GET_SYMTABS(64)
131} 149}
132 150
161 } \ 179 } \
162 } 180 }
163 SHOW_PAX(32) 181 SHOW_PAX(32)
164 SHOW_PAX(64) 182 SHOW_PAX(64)
165 } 183 }
166
167 184
168 if (fix_elf && setpax) { 185 if (fix_elf && setpax) {
169 /* set the chpax settings */ 186 /* set the chpax settings */
170 if (elf->elf_class == ELFCLASS32) { 187 if (elf->elf_class == ELFCLASS32) {
171 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)
230 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 247 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
231 found = found_relro; \ 248 found = found_relro; \
232 offset = 4; \ 249 offset = 4; \
233 check_flags = PF_X; \ 250 check_flags = PF_X; \
234 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 251 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
235 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) \
236 if (multi_load++ > max_pt_load) \ 253 if (multi_load++ > max_pt_load) \
237 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); \
238 if (file_matches_list(elf->filename, qa_wx_load)) \ 255 if (file_matches_list(elf->filename, qa_wx_load)) \
239 continue; \ 256 continue; \
240 found = found_load; \ 257 found = found_load; \
257 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
258 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
259 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
260 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
261 char *str; \ 278 char *str; \
262 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
263 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
264 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
265 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
266 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
267 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
298 return NULL; 315 return NULL;
299 else 316 else
300 return ret; 317 return ret;
301} 318}
302 319
320/*
321 * See if this ELF contains a DT_TEXTREL tag in any of its
322 * PT_DYNAMIC sections.
323 */
303static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 324static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
304{ 325{
305 static const char *ret = "TEXTREL"; 326 static const char *ret = "TEXTREL";
306 unsigned long i; 327 unsigned long i;
307 328
315 Elf ## B ## _Dyn *dyn; \ 336 Elf ## B ## _Dyn *dyn; \
316 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 337 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
317 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 338 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
318 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
319 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
320 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; \
321 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
322 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
323 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
324 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
325 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)*/ \
326 *found_textrel = 1; \ 347 *found_textrel = 1; \
327 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
328 return (be_wewy_wewy_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
337 if (be_quiet || be_wewy_wewy_quiet) 358 if (be_quiet || be_wewy_wewy_quiet)
338 return NULL; 359 return NULL;
339 else 360 else
340 return " - "; 361 return " - ";
341} 362}
363
364/*
365 * Scan the .text section to see if there are any relocations in it.
366 * Should rewrite this to check PT_LOAD sections that are marked
367 * Executable rather than the section named '.text'.
368 */
342static 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)
343{ 370{
344 unsigned long s, r, rmax; 371 unsigned long s, r, rmax;
345 void *symtab_void, *strtab_void, *text_void; 372 void *symtab_void, *strtab_void, *text_void;
346 373
367 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
368 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
369 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
370 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
371 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
372 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
373 rela = NULL; \ 400 rela = NULL; \
374 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
375 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
376 rel = NULL; \ 403 rel = NULL; \
377 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
378 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
379 } else \ 406 } else \
380 continue; \ 407 continue; \
381 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
382 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
397 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
398 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
399 } else \ 426 } else \
400 *found_textrels = 1; \ 427 *found_textrels = 1; \
401 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
402 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
403 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
404 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
405 continue; \ 432 continue; \
406 } \ 433 } \
407 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
408 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
411 sym = NULL; \ 438 sym = NULL; \
412 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
413 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
414 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
415 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
416 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)); \
417 else \ 444 else \
418 printf("(memory/data?)"); \ 445 printf("(memory/data?)"); \
419 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
420 /* 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 */ \
421 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
422 func = NULL; \ 449 func = NULL; \
423 offset_tmp = 0; \ 450 offset_tmp = 0; \
424 while (sym_max--) { \ 451 while (sym_max--) { \
425 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) { \
426 func = sym; \ 453 func = sym; \
437 printf("%s", func_name); \ 464 printf("%s", func_name); \
438 } else \ 465 } else \
439 printf("(optimized out)"); \ 466 printf("(optimized out)"); \
440 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 467 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
441 if (be_verbose && has_objdump) { \ 468 if (be_verbose && has_objdump) { \
469 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
442 char *sysbuf; \ 470 char *sysbuf; \
443 size_t syslen; \ 471 size_t syslen; \
472 int sysret; \
444 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"; \
445 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \ 474 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
446 sysbuf = xmalloc(syslen); \ 475 sysbuf = xmalloc(syslen); \
447 if (sysbuf) { \
448 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
449 if (end_addr < r_offset) \ 476 if (end_addr < r_offset) \
450 /* not uncommon when things are optimized out */ \ 477 /* not uncommon when things are optimized out */ \
451 end_addr = r_offset + 0x100; \ 478 end_addr = r_offset + 0x100; \
452 snprintf(sysbuf, syslen, sysfmt, \ 479 snprintf(sysbuf, syslen, sysfmt, \
453 (unsigned long)offset_tmp, \ 480 (unsigned long)offset_tmp, \
454 (unsigned long)end_addr, \ 481 (unsigned long)end_addr, \
455 elf->filename, \ 482 elf->filename, \
456 (unsigned long)r_offset); \ 483 (unsigned long)r_offset); \
457 fflush(stdout); \ 484 fflush(stdout); \
458 system(sysbuf); \ 485 sysret = system(sysbuf); \
459 fflush(stdout); \ 486 fflush(stdout); \
460 free(sysbuf); \ 487 free(sysbuf); \
461 } \
462 } \ 488 } \
463 } \ 489 } \
464 } } 490 } }
465 SHOW_TEXTRELS(32) 491 SHOW_TEXTRELS(32)
466 SHOW_TEXTRELS(64) 492 SHOW_TEXTRELS(64)
469 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);
470 496
471 return NULL; 497 return NULL;
472} 498}
473 499
474static void rpath_security_checks(elfobj *, char *, const char *);
475static 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)
476{ 501{
477 struct stat st; 502 struct stat st;
478 switch (*item) { 503 switch (*item) {
479 case '/': break; 504 case '/': break;
486 break; 511 break;
487 case '$': 512 case '$':
488 if (fstat(elf->fd, &st) != -1) 513 if (fstat(elf->fd, &st) != -1)
489 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 514 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
490 warnf("Security problem with %s='%s' in %s with mode set of %o", 515 warnf("Security problem with %s='%s' in %s with mode set of %o",
491 dt_type, item, elf->filename, st.st_mode & 07777); 516 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
492 break; 517 break;
493 default: 518 default:
494 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename); 519 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
495 break; 520 break;
496 } 521 }
497} 522}
498static 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)
499{ 524{
500 unsigned long i, s; 525 unsigned long i;
501 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
502 void *strtbl_void; 527 void *strtbl_void;
503 528
504 if (!show_rpath) return; 529 if (!show_rpath) return;
505 530
516 Elf ## B ## _Off offset; \ 541 Elf ## B ## _Off offset; \
517 Elf ## B ## _Xword word; \ 542 Elf ## B ## _Xword word; \
518 /* Scan all the program headers */ \ 543 /* Scan all the program headers */ \
519 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 544 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
520 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
521 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; \
522 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
523 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
524 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
525 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
526 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
527 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
528 r = &rpath; \ 553 r = &rpath; \
529 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
530 r = &runpath; \ 555 r = &runpath; \
534 } \ 559 } \
535 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
536 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
537 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
538 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
539 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
540 /* 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 */ \
541 if (fix_elf) \ 566 if (fix_elf) \
542 offset = strlen(*r); \ 567 offset = strlen(*r); \
543 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
544 if (be_quiet) { \ 569 if (be_quiet) { \
550 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
551 while (start) { \ 576 while (start) { \
552 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
553 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
554 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
555 if (use_ldcache) \ 580 if (use_ldcache) { \
556 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
557 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
558 *r = end; \ 585 *r = end; \
559 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
560 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
561 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
562 (*r)++; \ 589 (*r)++; \
563 break; \ 590 break; \
564 } \ 591 } \
592 } \
565 if (!*r || !end) \ 593 if (!*r || !end) \
566 break; \ 594 break; \
567 else \ 595 else \
568 start = start + len + 1; \ 596 start = start + len + 1; \
569 } \ 597 } \
654#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
655#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
656#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
657#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
658 686
659static char *lookup_cache_lib(elfobj *, char *);
660
661#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
662 688
663static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
664{ 690{
665 int fd = 0; 691 int fd;
666 char *strs; 692 char *strs;
667 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
668 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
669 struct stat st; 695 struct stat st;
670 696
671 typedef struct { 697 typedef struct {
672 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
673 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
683 libentry_t *libent; 709 libentry_t *libent;
684 710
685 if (fname == NULL) 711 if (fname == NULL)
686 return NULL; 712 return NULL;
687 713
688 if (ldcache == 0) { 714 if (ldcache == NULL) {
689 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)
690 return NULL; 720 return NULL;
691 721
692 /* 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 */
693 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
694 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
695
696 close(fd); 725 close(fd);
697 726
698 if (ldcache == (caddr_t)-1) { 727 if (ldcache == MAP_FAILED) {
699 ldcache = 0; 728 ldcache = NULL;
700 return NULL; 729 return NULL;
701 } 730 }
702 731
703 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;
704 return NULL; 737 return NULL;
705 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
706 return NULL;
707 } 738 }
739 } else
740 header = ldcache;
708 741
709 header = (header_t *) ldcache;
710 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
711 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
712 744
713 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
714 /* 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
715 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
716 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
717 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
718 continue; 751 continue;
719 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
720 continue; 753 continue;
721 754
722 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
723 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
724 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
725 } 761 }
762
726 return buf; 763 return buf;
727} 764}
765
728#elif defined(__NetBSD__) 766#elif defined(__NetBSD__)
729static char *lookup_cache_lib(elfobj *elf, char *fname) 767static char *lookup_cache_lib(elfobj *elf, char *fname)
730{ 768{
731 static char buf[__PAX_UTILS_PATH_MAX] = ""; 769 static char buf[__PAX_UTILS_PATH_MAX] = "";
732 static struct stat st; 770 static struct stat st;
733 771 size_t n;
734 char **ldpath; 772 char *ldpath;
735 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 773
774 array_for_each(ldpath, n, ldpath) {
736 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))
737 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 */
738 777
739 if (stat(buf, &st) != 0) 778 if (stat(buf, &st) != 0)
740 continue; /* if the lib doesn't exist in *ldpath, look further */ 779 continue; /* if the lib doesn't exist in *ldpath, look further */
741 780
749 788
750 /* not found in any path */ 789 /* not found in any path */
751 return NULL; 790 return NULL;
752} 791}
753#else 792#else
793#ifdef __ELF__
754#warning Cache support not implemented for your target 794#warning Cache support not implemented for your target
795#endif
755static char *lookup_cache_lib(elfobj *elf, char *fname) 796static char *lookup_cache_lib(elfobj *elf, char *fname)
756{ 797{
757 return NULL; 798 return NULL;
758} 799}
759#endif 800#endif
763 unsigned long i; 804 unsigned long i;
764 char *needed; 805 char *needed;
765 void *strtbl_void; 806 void *strtbl_void;
766 char *p; 807 char *p;
767 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
768 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
769 815
770 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
771 817
772 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
773#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
775 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
776 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
777 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
778 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
779 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 */ \
780 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
781 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; \
782 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
783 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 */ \
784 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
785 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
786 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
787 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
788 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
789 ++dyn; \ 840 ++dyn; \
790 continue; \ 841 continue; \
791 } \ 842 } \
792 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
793 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
794 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
795 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
796 if (use_ldcache) \ 848 if (use_ldcache) \
797 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
798 needed = p; \ 850 needed = p; \
799 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
800 } \ 852 } \
801 *found_needed = 1; \ 853 *found_needed = 1; \
802 } else { \ 854 } else { \
803 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \ 855 /* -N -> print matching entries */ \
856 size_t n; \
857 const char *find_lib_name; \
858 \
859 array_for_each(find_lib_arr, n, find_lib_name) \
860 if (!strcmp(find_lib_name, needed)) \
861 ++matched; \
862 \
863 if (matched == array_cnt(find_lib_arr)) { \
804 *found_lib = 1; \ 864 *found_lib = 1; \
805 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
806 } \ 866 } \
807 } \ 867 } \
808 } \ 868 } \
809 ++dyn; \ 869 ++dyn; \
810 } \ 870 } \
851 Elf ## B ## _Dyn *dyn; \ 911 Elf ## B ## _Dyn *dyn; \
852 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 912 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
853 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 913 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
854 Elf ## B ## _Off offset; \ 914 Elf ## B ## _Off offset; \
855 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
856 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; \
857 dynamic = 1; \ 917 dynamic = 1; \
858 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
859 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
860 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
861 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
862 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
863 (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)) \
864 { \ 924 { \
865 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
878 /* 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 */
879 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))))) {
880 return NULL; 940 return NULL;
881 } else { 941 } else {
882 *found_bind = 1; 942 *found_bind = 1;
883 return (char *) (dynamic ? "LAZY" : "STATIC"); 943 return (char *)(dynamic ? "LAZY" : "STATIC");
884 } 944 }
885} 945}
886static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
887{ 947{
888 unsigned long i; 948 unsigned long i;
900 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 960 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
901 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 961 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
902 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 962 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
903 Elf ## B ## _Off offset; \ 963 Elf ## B ## _Off offset; \
904 /* only look for soname in shared objects */ \ 964 /* only look for soname in shared objects */ \
905 if (ehdr->e_type != ET_DYN) \ 965 if (EGET(ehdr->e_type) != ET_DYN) \
906 return NULL; \ 966 return NULL; \
907 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
908 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; \
909 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
910 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
911 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
912 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
913 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
914 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
915 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
916 ++dyn; \ 976 ++dyn; \
917 continue; \ 977 continue; \
918 } \ 978 } \
919 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
920 *found_soname = 1; \ 980 *found_soname = 1; \
921 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
922 } \ 982 } \
923 ++dyn; \ 983 ++dyn; \
924 } \ 984 } \
927 SHOW_SONAME(64) 987 SHOW_SONAME(64)
928 } 988 }
929 989
930 return NULL; 990 return NULL;
931} 991}
992
993/*
994 * We support the symbol form:
995 * [%[modifiers]%][[+-]<symbol name>][,[.....]]
996 * If the symbol name is empty, then all symbols are matched.
997 * If the symbol name is a glob ("*"), then all symbols are dumped (debug).
998 * Do not rely on this output format at all.
999 * Otherwise the symbol name is used to search (either regex or string compare).
1000 * If the first char of the symbol name is a plus ("+"), then only match
1001 * defined symbols. If it's a minus ("-"), only match undefined symbols.
1002 * Putting modifiers in between the percent signs allows for more in depth
1003 * filters. There are groups of modifiers. If you don't specify a member
1004 * of a group, then all types in that group are matched. The current
1005 * groups and their types are:
1006 * STT group: STT_NOTYPE:n STT_OBJECT:o STT_FUNC:f SST_FILE:F
1007 * STB group: STB_LOCAL:l STB_GLOBAL:g STB_WEAK:w
1008 * SHN group: SHN_UNDEF:u SHN_ABS:a SHN_COMMON:c {defined}:d
1009 * The "defined" value in the SHN group does not correspond to a SHN_xxx define.
1010 * You can search for multiple symbols at once by seperating with a comma (",").
1011 *
1012 * Some examples:
1013 * ELFs with a weak function "foo":
1014 * scanelf -s %wf%foo <ELFs>
1015 * ELFs that define the symbol "main":
1016 * scanelf -s +main <ELFs>
1017 * scanelf -s %d%main <ELFs>
1018 * ELFs that refer to the undefined symbol "brk":
1019 * scanelf -s -brk <ELFs>
1020 * scanelf -s %u%brk <ELFs>
1021 * All global defined objects in an ELF:
1022 * scanelf -s %ogd% <ELF>
1023 */
1024static void
1025scanelf_match_symname(elfobj *elf, char *found_sym, char **ret, size_t *ret_len, const char *symname,
1026 unsigned int stt, unsigned int stb, unsigned int shn, unsigned long size)
1027{
1028 char *this_sym, *next_sym, saved = saved;
1029
1030 /* allow the user to specify a comma delimited list of symbols to search for */
1031 next_sym = NULL;
1032 do {
1033 bool inc_notype, inc_object, inc_func, inc_file,
1034 inc_local, inc_global, inc_weak,
1035 inc_def, inc_undef, inc_abs, inc_common;
1036
1037 if (next_sym) {
1038 next_sym[-1] = saved;
1039 this_sym = next_sym;
1040 } else
1041 this_sym = find_sym;
1042 if ((next_sym = strchr(this_sym, ','))) {
1043 /* make parsing easier by killing the comma temporarily */
1044 saved = *next_sym;
1045 *next_sym = '\0';
1046 next_sym += 1;
1047 }
1048
1049 /* symbol selection! */
1050 inc_notype = inc_object = inc_func = inc_file = \
1051 inc_local = inc_global = inc_weak = \
1052 inc_def = inc_undef = inc_abs = inc_common = \
1053 (*this_sym != '%');
1054
1055 /* parse the contents of %...% */
1056 if (!inc_notype) {
1057 while (*(this_sym++)) {
1058 if (*this_sym == '%') {
1059 ++this_sym;
1060 break;
1061 }
1062 switch (*this_sym) {
1063 case 'n': inc_notype = true; break;
1064 case 'o': inc_object = true; break;
1065 case 'f': inc_func = true; break;
1066 case 'F': inc_file = true; break;
1067 case 'l': inc_local = true; break;
1068 case 'g': inc_global = true; break;
1069 case 'w': inc_weak = true; break;
1070 case 'd': inc_def = true; break;
1071 case 'u': inc_undef = true; break;
1072 case 'a': inc_abs = true; break;
1073 case 'c': inc_common = true; break;
1074 default: err("invalid symbol selector '%c'", *this_sym);
1075 }
1076 }
1077
1078 /* If no types are matched, not match all */
1079 if (!inc_notype && !inc_object && !inc_func && !inc_file)
1080 inc_notype = inc_object = inc_func = inc_file = true;
1081 if (!inc_local && !inc_global && !inc_weak)
1082 inc_local = inc_global = inc_weak = true;
1083 if (!inc_def && !inc_undef && !inc_abs && !inc_common)
1084 inc_def = inc_undef = inc_abs = inc_common = true;
1085
1086 /* backwards compat for defined/undefined short hand */
1087 } else if (*this_sym == '+') {
1088 inc_undef = false;
1089 ++this_sym;
1090 } else if (*this_sym == '-') {
1091 inc_def = inc_abs = inc_common = false;
1092 ++this_sym;
1093 }
1094
1095 /* filter symbols */
1096 if ((!inc_notype && stt == STT_NOTYPE) || \
1097 (!inc_object && stt == STT_OBJECT) || \
1098 (!inc_func && stt == STT_FUNC ) || \
1099 (!inc_file && stt == STT_FILE ) || \
1100 (!inc_local && stb == STB_LOCAL ) || \
1101 (!inc_global && stb == STB_GLOBAL) || \
1102 (!inc_weak && stb == STB_WEAK ) || \
1103 (!inc_def && shn && shn < SHN_LORESERVE) || \
1104 (!inc_undef && shn == SHN_UNDEF ) || \
1105 (!inc_abs && shn == SHN_ABS ) || \
1106 (!inc_common && shn == SHN_COMMON))
1107 continue;
1108
1109 if (*this_sym == '*') {
1110 /* a "*" symbol gets you debug output */
1111 printf("%s(%s) %5lX %15s %15s %15s %s\n",
1112 ((*found_sym == 0) ? "\n\t" : "\t"),
1113 elf->base_filename,
1114 size,
1115 get_elfstttype(stt),
1116 get_elfstbtype(stb),
1117 get_elfshntype(shn),
1118 symname);
1119 goto matched;
1120
1121 } else {
1122 if (g_match) {
1123 /* regex match the symbol */
1124 if (rematch(this_sym, symname, REG_EXTENDED) != 0)
1125 continue;
1126
1127 } else if (*this_sym) {
1128 /* give empty symbols a "pass", else do a normal compare */
1129 const size_t len = strlen(this_sym);
1130 if (!(strncmp(this_sym, symname, len) == 0 &&
1131 /* Accept unversioned symbol names */
1132 (symname[len] == '\0' || symname[len] == '@')))
1133 continue;
1134 }
1135
1136 if (be_semi_verbose) {
1137 char buf[1024];
1138 snprintf(buf, sizeof(buf), "%lX %s %s",
1139 size,
1140 get_elfstttype(stt),
1141 this_sym);
1142 *ret = xstrdup(buf);
1143 } else {
1144 if (*ret) xchrcat(ret, ',', ret_len);
1145 xstrcat(ret, symname, ret_len);
1146 }
1147
1148 goto matched;
1149 }
1150 } while (next_sym);
1151
1152 return;
1153
1154 matched:
1155 *found_sym = 1;
1156 if (next_sym)
1157 next_sym[-1] = saved;
1158}
1159
932static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
933{ 1161{
934 unsigned long i; 1162 unsigned long i;
935 char *ret; 1163 char *ret;
936 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
937 1165
938 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
939 ret = find_sym; 1167 ret = NULL;
940 1168
941 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
942 1170
943 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
944#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
945 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
946 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
947 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
948 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)); \
949 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
950 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
951 if (cnt) \ 1180 if (cnt) \
952 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
953 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 } \
954 if (sym->st_name) { \ 1187 if (sym->st_name) { \
955 /* make sure the symbol name is in acceptable memory range */ \ 1188 /* make sure the symbol name is in acceptable memory range */ \
956 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
957 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
958 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
959 ++sym; \ 1192 ++sym; \
960 continue; \ 1193 continue; \
961 } \ 1194 } \
962 /* debug display ... show all symbols and some extra info */ \ 1195 scanelf_match_symname(elf, found_sym, \
963 if (*ret == '*') { \ 1196 &ret, &ret_len, symname, \
964 printf("%s(%s) %5lX %15s %s\n", \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
965 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
966 elf->base_filename, \ 1199 EGET(sym->st_shndx), \
967 (unsigned long)sym->st_size, \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
968 get_elfstttype(sym->st_info), \ 1201 EGET(sym->st_size)); \
969 symname); \
970 *found_sym = 1; \
971 } else { \
972 /* allow the user to specify a comma delimited list of symbols to search for */ \
973 char *this_sym, *this_sym_ver, *next_sym; \
974 this_sym = ret; \
975 this_sym_ver = versioned_symname; \
976 do { \
977 next_sym = strchr(this_sym, ','); \
978 if (next_sym == NULL) \
979 next_sym = this_sym + strlen(this_sym); \
980 /* do we want a defined symbol ? */ \
981 if (*this_sym == '+') { \
982 if (sym->st_shndx == SHN_UNDEF) \
983 goto skip_this_sym##B; \
984 ++this_sym; \
985 ++this_sym_ver; \
986 /* do we want an undefined symbol ? */ \
987 } else if (*this_sym == '-') { \
988 if (sym->st_shndx != SHN_UNDEF) \
989 goto skip_this_sym##B; \
990 ++this_sym; \
991 ++this_sym_ver; \
992 } \
993 /* ok, lets compare the name now */ \
994 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
995 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
996 if (be_semi_verbose) { \
997 char buf[126]; \
998 snprintf(buf, sizeof(buf), "%lX %s %s", \
999 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1000 ret = buf; \
1001 } else \
1002 ret = this_sym; \
1003 (*found_sym)++; \
1004 goto break_out; \
1005 } \
1006 skip_this_sym##B: this_sym = next_sym + 1; \
1007 } while (*next_sym != '\0'); \
1008 } \
1009 } \ 1202 } \
1010 ++sym; \ 1203 ++sym; \
1011 } } 1204 } }
1012 FIND_SYM(32) 1205 FIND_SYM(32)
1013 FIND_SYM(64) 1206 FIND_SYM(64)
1019 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
1020 return ret; 1213 return ret;
1021 if (be_quiet) 1214 if (be_quiet)
1022 return NULL; 1215 return NULL;
1023 else 1216 else
1024 return (char *)" - "; 1217 return " - ";
1025} 1218}
1026 1219
1027
1028static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1029{ 1221{
1030 if (!find_section) 1222 if (!find_section)
1031 return NULL; 1223 return NULL;
1032 1224
1033#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
1034 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1035 int invert; \ 1228 int invert; \
1229 const char *section_name; \
1036 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1037 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
1038 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1039 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)) \
1040 *found_section = 1; \ 1241 *found_section = 1; \
1041 } 1242 }
1042 FIND_SECTION(32) 1243 FIND_SECTION(32)
1043 FIND_SECTION(64) 1244 FIND_SECTION(64)
1044 1245
1049 return find_section; 1250 return find_section;
1050 1251
1051 if (be_quiet) 1252 if (be_quiet)
1052 return NULL; 1253 return NULL;
1053 else 1254 else
1054 return (char *)" - "; 1255 return " - ";
1055} 1256}
1056 1257
1057/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1058#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1059static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1060{ 1261{
1061 unsigned long i; 1262 unsigned long i;
1062 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1063 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
1077 printf("%s: scanning file\n", elf->filename); 1278 printf("%s: scanning file\n", elf->filename);
1078 1279
1079 /* init output buffer */ 1280 /* init output buffer */
1080 if (!out_buffer) { 1281 if (!out_buffer) {
1081 out_len = sizeof(char) * 80; 1282 out_len = sizeof(char) * 80;
1082 out_buffer = (char*)xmalloc(out_len); 1283 out_buffer = xmalloc(out_len);
1083 } 1284 }
1084 *out_buffer = '\0'; 1285 *out_buffer = '\0';
1085 1286
1086 /* show the header */ 1287 /* show the header */
1087 if (!be_quiet && show_banner) { 1288 if (!be_quiet && show_banner) {
1098 case 'o': prints(" TYPE "); break; 1299 case 'o': prints(" TYPE "); break;
1099 case 'x': prints(" PAX "); break; 1300 case 'x': prints(" PAX "); break;
1100 case 'e': prints("STK/REL/PTL "); break; 1301 case 'e': prints("STK/REL/PTL "); break;
1101 case 't': prints("TEXTREL "); break; 1302 case 't': prints("TEXTREL "); break;
1102 case 'r': prints("RPATH "); break; 1303 case 'r': prints("RPATH "); break;
1304 case 'M': prints("CLASS "); break;
1103 case 'n': prints("NEEDED "); break; 1305 case 'n': prints("NEEDED "); break;
1104 case 'i': prints("INTERP "); break; 1306 case 'i': prints("INTERP "); break;
1105 case 'b': prints("BIND "); break; 1307 case 'b': prints("BIND "); break;
1308 case 'Z': prints("SIZE "); break;
1106 case 'S': prints("SONAME "); break; 1309 case 'S': prints("SONAME "); break;
1107 case 's': prints("SYM "); break; 1310 case 's': prints("SYM "); break;
1108 case 'N': prints("LIB "); break; 1311 case 'N': prints("LIB "); break;
1109 case 'T': prints("TEXTRELS "); break; 1312 case 'T': prints("TEXTRELS "); break;
1110 case 'k': prints("SECTION "); break; 1313 case 'k': prints("SECTION "); break;
1111 case 'a': prints("ARCH "); break; 1314 case 'a': prints("ARCH "); break;
1315 case 'I': prints("OSABI "); break;
1316 case 'Y': prints("EABI "); break;
1317 case 'O': prints("PERM "); break;
1318 case 'D': prints("ENDIAN "); break;
1112 default: warnf("'%c' has no title ?", out_format[i]); 1319 default: warnf("'%c' has no title ?", out_format[i]);
1113 } 1320 }
1114 } 1321 }
1115 if (!found_file) prints("FILE "); 1322 if (!found_file) prints("FILE ");
1116 prints("\n"); 1323 prints("\n");
1120 1327
1121 /* dump all the good stuff */ 1328 /* dump all the good stuff */
1122 for (i = 0; out_format[i]; ++i) { 1329 for (i = 0; out_format[i]; ++i) {
1123 const char *out; 1330 const char *out;
1124 const char *tmp; 1331 const char *tmp;
1125 1332 static char ubuf[sizeof(unsigned long)*2];
1126 if (!IS_MODIFIER(out_format[i])) { 1333 if (!IS_MODIFIER(out_format[i])) {
1127 xchrcat(&out_buffer, out_format[i], &out_len); 1334 xchrcat(&out_buffer, out_format[i], &out_len);
1128 continue; 1335 continue;
1129 } 1336 }
1130 1337
1166 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1373 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1167 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;
1168 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1169 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;
1170 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 1377 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1378 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1379 case 'D': out = get_endian(elf); break;
1380 case 'O': out = strfileperms(elf->filename); break;
1171 case 'n': 1381 case 'n':
1172 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;
1173 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1174 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1175 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1176 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1386 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1177 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1387 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1178 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;;
1179 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1180 } 1393 }
1181 if (out) { 1394 if (out)
1182 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1183 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1184 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1185 else
1186 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1187 }
1188 } 1396 }
1189 1397
1190#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1191 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1192 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1224 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1225 goto label_done; 1433 goto label_done;
1226 break; 1434 break;
1227 default: break; 1435 default: break;
1228 } 1436 }
1229 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1230 char sbuf[126]; 1438 char sbuf[126];
1231 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1232 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1233 char *p; 1441 char *p;
1234 while((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1235 *p = 0; 1443 *p = 0;
1236 if (etype_lookup(p+1) == get_etype(elf)) 1444 if (etype_lookup(p+1) == get_etype(elf))
1237 goto label_ret; 1445 goto label_ret;
1238 } 1446 }
1239 } 1447 }
1259 1467
1260 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1261 if (ar == NULL) 1469 if (ar == NULL)
1262 return 1; 1470 return 1;
1263 1471
1264 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);
1265 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");
1266 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);
1267 if (elf) { 1478 if (elf) {
1268 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1269 unreadelf(elf); 1480 unreadelf(elf);
1270 } 1481 }
1271 } 1482 }
1290 if (!S_ISREG(st->st_mode)) { 1501 if (!S_ISREG(st->st_mode)) {
1291 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1502 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1292 return 1; 1503 return 1;
1293 } 1504 }
1294 1505
1506 if (match_perms) {
1507 if ((st->st_mode | match_perms) != st->st_mode)
1508 return 1;
1509 }
1295 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1510 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1296 return 1; 1511 return 1;
1297 1512
1298 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives) 1513 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1299 /* if it isn't an ELF, maybe it's an .a archive */ 1514 /* if it isn't an ELF, maybe it's an .a archive */
1300 scanelf_archive(filename, fd, st->st_size); 1515 scanelf_archive(filename, fd, st->st_size);
1301 1516
1302 close(fd); 1517 close(fd);
1303 return 0; 1518 return 0;
1519}
1520
1521static const char *maybe_add_root(const char *fname, char *buf)
1522{
1523 if (root && strncmp(fname, root, strlen(root))) {
1524 strcpy(buf, root);
1525 strncat(buf, fname, __PAX_UTILS_PATH_MAX - strlen(root) - 1);
1526 fname = buf;
1527 }
1528 return fname;
1304} 1529}
1305 1530
1306/* 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 */
1307static int scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1308{ 1533{
1309 register DIR *dir; 1534 register DIR *dir;
1310 register struct dirent *dentry; 1535 register struct dirent *dentry;
1311 struct stat st_top, st; 1536 struct stat st_top, st;
1312 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1313 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1314 int ret = 0; 1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1315 1543
1316 /* make sure path exists */ 1544 /* make sure path exists */
1317 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1318 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1319 return 1; 1547 return 1;
1383static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1384{ 1612{
1385 FILE *fp = NULL; 1613 FILE *fp = NULL;
1386 char *p; 1614 char *p;
1387 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1388 1617
1389 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1390 return i;
1391 1619
1392 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1393 return i; 1621 return i;
1394 1622
1395 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1396 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1397 *p = 0; 1625 *p = 0;
1398 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1399 *p = 0; 1627 *p = 0;
1400#ifdef __linux__ 1628
1401 // recursive includes of the same file will make this segfault. 1629 /* recursive includes of the same file will make this segfault. */
1402 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1403 glob64_t gl; 1631 glob_t gl;
1404 size_t x; 1632 size_t x;
1405 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1406 1634
1407 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1408 1638
1409 if (path[8] != '/') 1639 if (path[8] != '/')
1410 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1411 else 1641 else
1412 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1413 1643
1414 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1415 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1416 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1417 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1418 continue; 1648 continue;
1419 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1420 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1421 globfree64(&gl);
1422 return i;
1423 }
1424 } 1650 }
1425 globfree64 (&gl); 1651 globfree(&gl);
1426 continue; 1652 continue;
1427 } 1653 }
1428 } 1654 }
1429#endif 1655
1430 if (*path != '/') 1656 if (*path != '/')
1431 continue; 1657 continue;
1432 1658
1433 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1434
1435 if (i + 1 == ARRAY_SIZE(ldpaths))
1436 break;
1437 } 1660 }
1438 ldpaths[i] = NULL;
1439 1661
1440 fclose(fp); 1662 fclose(fp);
1441 return i; 1663 return i;
1442} 1664}
1443 1665
1444#elif defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1445 1667
1446static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1447{ 1669{
1448 FILE *fp = NULL; 1670 FILE *fp = NULL;
1449 char *b = NULL, *p; 1671 char *b = NULL, *p;
1450 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1451 1674
1452 if (i + 1 == ARRAY_SIZE(ldpaths)) 1675 fname = maybe_add_root(fname, _fname);
1453 return i;
1454 1676
1455 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1456 return i; 1678 return i;
1457 1679
1458 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1461 { 1683 {
1462 fclose(fp); 1684 fclose(fp);
1463 return i; 1685 return i;
1464 } 1686 }
1465 1687
1466 b = (char*)malloc(hdr.dirlistlen+1); 1688 b = xmalloc(hdr.dirlistlen + 1);
1467 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) { 1689 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1468 fclose(fp); 1690 fclose(fp);
1469 free(b); 1691 free(b);
1470 return i; 1692 return i;
1471 } 1693 }
1472 1694
1473 while ((p = strsep(&b, ":"))) { 1695 while ((p = strsep(&b, ":"))) {
1474 if (*p == '\0') continue; 1696 if (*p == '\0')
1475 ldpaths[i++] = xstrdup(p); 1697 continue;
1476 1698 xarraypush(ldpaths, p, strlen(p));
1477 if (i + 1 == ARRAY_SIZE(ldpaths))
1478 break;
1479 } 1699 }
1480 ldpaths[i] = NULL;
1481 1700
1482 free(b); 1701 free(b);
1483 fclose(fp); 1702 fclose(fp);
1484 return i; 1703 return i;
1485} 1704}
1486 1705
1487#else 1706#else
1488 1707#ifdef __ELF__
1489#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1709#endif
1490static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1491{ 1711{
1492 memset(ldpaths, 0x00, sizeof(ldpaths)); 1712 return 0;
1493} 1713}
1494
1495#endif 1714#endif
1496 1715
1497/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1498static void scanelf_ldpath() 1717static void scanelf_ldpath(void)
1499{ 1718{
1500 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1501 int i = 0; 1722 int i = 0;
1502 1723
1503 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1504 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1505 1726
1506 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1507 1728
1508 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1509 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1510 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1511 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1512 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1513 ++i; 1734 ++i;
1514 } 1735 }
1515 1736
1516 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1517 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1518 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1739 if (!scan_ull) scanelf_dir("/usr/local/lib");
1519} 1740}
1520 1741
1521/* scan env PATH for paths */ 1742/* scan env PATH for paths */
1522static void scanelf_envpath() 1743static void scanelf_envpath(void)
1523{ 1744{
1524 char *path, *p; 1745 char *path, *p;
1525 1746
1526 path = getenv("PATH"); 1747 path = getenv("PATH");
1527 if (!path) 1748 if (!path)
1534 } 1755 }
1535 1756
1536 free(path); 1757 free(path);
1537} 1758}
1538 1759
1539/* usage / invocation handling functions */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1540#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:BhV" 1761#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZCBhV"
1541#define a_argument required_argument 1762#define a_argument required_argument
1542static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1543 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1544 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1545 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1546 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1547 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1548 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1549 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1562 {"lib", a_argument, NULL, 'N'}, 1784 {"lib", a_argument, NULL, 'N'},
1563 {"gmatch", no_argument, NULL, 'g'}, 1785 {"gmatch", no_argument, NULL, 'g'},
1564 {"textrels", no_argument, NULL, 'T'}, 1786 {"textrels", no_argument, NULL, 'T'},
1565 {"etype", a_argument, NULL, 'E'}, 1787 {"etype", a_argument, NULL, 'E'},
1566 {"bits", a_argument, NULL, 'M'}, 1788 {"bits", a_argument, NULL, 'M'},
1789 {"endian", no_argument, NULL, 'D'},
1790 {"osabi", no_argument, NULL, 'I'},
1791 {"eabi", no_argument, NULL, 'Y'},
1792 {"perms", a_argument, NULL, 'O'},
1793 {"size", no_argument, NULL, 'Z'},
1567 {"all", no_argument, NULL, 'a'}, 1794 {"all", no_argument, NULL, 'a'},
1568 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1569 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1570 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1571 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1572 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1573 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1574 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1575 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1576 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1577}; 1805};
1578 1806
1579static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1580 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1581 "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)",
1582 "Scan directories recursively", 1811 "Scan directories recursively",
1583 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1584 "Don't scan symlinks", 1813 "Don't scan symlinks",
1585 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1586 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1595 "Print BIND information", 1824 "Print BIND information",
1596 "Print SONAME information", 1825 "Print SONAME information",
1597 "Find a specified symbol", 1826 "Find a specified symbol",
1598 "Find a specified section", 1827 "Find a specified section",
1599 "Find a specified library", 1828 "Find a specified library",
1600 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1601 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1602 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1603 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1604 "Print all scanned info (-x -e -t -r -b)\n", 1833 "Print Endianness",
1834 "Print OSABI",
1835 "Print EABI (EM_ARM Only)",
1836 "Print only ELF files matching octal permissions",
1837 "Print ELF file size",
1838 "Print all useful/simple info\n",
1605 "Only output 'bad' things", 1839 "Only output 'bad' things",
1606 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1607 "Use specified format for output", 1841 "Use specified format for output",
1608 "Read input stream from a filename", 1842 "Read input stream from a filename",
1609 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1610 "Don't display the header", 1845 "Don't display the header",
1611 "Print this help and exit", 1846 "Print this help and exit",
1612 "Print version and exit", 1847 "Print version and exit",
1613 NULL 1848 NULL
1614}; 1849};
1622 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1623 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1624 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1625 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 1860 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1626 long_opts[i].name, opts_help[i]); 1861 long_opts[i].name, opts_help[i]);
1862 else if (long_opts[i].val > '~')
1863 printf(" --%-7s <arg> * %s\n",
1864 long_opts[i].name, opts_help[i]);
1627 else 1865 else
1628 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1629 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1630 1868
1631 if (status != EXIT_SUCCESS) 1869 puts("\nFor more information, see the scanelf(1) manpage");
1632 exit(status);
1633
1634 puts("\nThe format modifiers for the -F option are:");
1635 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1636 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1637 puts(" i INTERP \tb BIND \ts symbol");
1638 puts(" N library \to Type \tT TEXTRELs");
1639 puts(" S SONAME \tk section \ta arch");
1640 puts(" p filename (with search path removed)");
1641 puts(" f filename (short name/basename)");
1642 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1643
1644 puts("\nELF Etypes:");
1645 print_etypes(stdout);
1646
1647 exit(status); 1870 exit(status);
1648} 1871}
1649 1872
1650/* parse command line arguments and preform needed actions */ 1873/* parse command line arguments and preform needed actions */
1651#define do_pax_state(option, flag) \ 1874#define do_pax_state(option, flag) \
1676 case 'f': 1899 case 'f':
1677 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");
1678 from_file = optarg; 1901 from_file = optarg;
1679 break; 1902 break;
1680 case 'E': 1903 case 'E':
1681 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1682 break; 1905 break;
1683 case 'M': 1906 case 'M':
1684 match_bits = atoi(optarg); 1907 match_bits = atoi(optarg);
1908 if (match_bits == 0) {
1909 if (strcmp(optarg, "ELFCLASS32") == 0)
1910 match_bits = 32;
1911 if (strcmp(optarg, "ELFCLASS64") == 0)
1912 match_bits = 64;
1913 }
1914 break;
1915 case 'O':
1916 if (sscanf(optarg, "%o", &match_perms) == -1)
1917 match_bits = 0;
1685 break; 1918 break;
1686 case 'o': { 1919 case 'o': {
1687 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1688 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1689 break; 1922 break;
1690 } 1923 }
1691 case 'k': 1924 case 'k':
1692 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1693 find_section = optarg;
1694 break; 1926 break;
1695 case 's': { 1927 case 's': {
1696 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");
1697 find_sym = optarg; 1929 find_sym = optarg;
1698 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1699 sprintf(versioned_symname, "%s@", find_sym);
1700 break; 1930 break;
1701 } 1931 }
1702 case 'N': { 1932 case 'N':
1703 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1704 find_lib = optarg;
1705 break; 1934 break;
1706 }
1707
1708 case 'F': { 1935 case 'F': {
1709 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");
1710 out_format = optarg; 1937 out_format = optarg;
1711 break; 1938 break;
1712 } 1939 }
1713 case 'z': { 1940 case 'z': {
1714 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1941 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1715 size_t x; 1942 size_t x;
1716 1943
1717 for (x = 0 ; x < strlen(optarg); x++) { 1944 for (x = 0; x < strlen(optarg); x++) {
1718 switch(optarg[x]) { 1945 switch (optarg[x]) {
1719 case 'p': 1946 case 'p':
1720 case 'P': 1947 case 'P':
1721 do_pax_state(optarg[x], PAGEEXEC); 1948 do_pax_state(optarg[x], PAGEEXEC);
1722 break; 1949 break;
1723 case 's': 1950 case 's':
1751 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1978 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1752 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1979 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1753 setpax = flags; 1980 setpax = flags;
1754 break; 1981 break;
1755 } 1982 }
1983 case 'Z': show_size = 1; break;
1756 case 'g': gmatch = 1; break; 1984 case 'g': g_match = 1; break;
1757 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1758 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1759 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1760 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1761 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1762 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1763 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1764 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1772 case 'b': show_bind = 1; break; 2001 case 'b': show_bind = 1; break;
1773 case 'S': show_soname = 1; break; 2002 case 'S': show_soname = 1; break;
1774 case 'T': show_textrels = 1; break; 2003 case 'T': show_textrels = 1; break;
1775 case 'q': be_quiet = 1; break; 2004 case 'q': be_quiet = 1; break;
1776 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1777 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break; 2006 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1778 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;
1779 case ':': 2013 case ':':
1780 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1781 case '?': 2015 case '?':
1782 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1783 default: 2017 default:
1786 } 2020 }
1787 if (show_textrels && be_verbose) { 2021 if (show_textrels && be_verbose) {
1788 if (which("objdump") != NULL) 2022 if (which("objdump") != NULL)
1789 has_objdump = 1; 2023 has_objdump = 1;
1790 } 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);
1791 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1792 if (out_format) { 2031 if (out_format) {
1793 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1794 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1795 show_textrels = 0; 2034 show_textrels = show_perms = show_endian = show_size = \
2035 show_osabi = show_eabi = 0;
1796 for (i = 0; out_format[i]; ++i) { 2036 for (i = 0; out_format[i]; ++i) {
1797 if (!IS_MODIFIER(out_format[i])) continue; 2037 if (!IS_MODIFIER(out_format[i])) continue;
1798 2038
1799 switch (out_format[++i]) { 2039 switch (out_format[++i]) {
1800 case '+': break; 2040 case '+': break;
1806 case 'k': break; 2046 case 'k': break;
1807 case 's': break; 2047 case 's': break;
1808 case 'N': break; 2048 case 'N': break;
1809 case 'o': break; 2049 case 'o': break;
1810 case 'a': break; 2050 case 'a': break;
2051 case 'M': break;
2052 case 'Z': show_size = 1; break;
2053 case 'D': show_endian = 1; break;
2054 case 'I': show_osabi = 1; break;
2055 case 'Y': show_eabi = 1; break;
2056 case 'O': show_perms = 1; break;
1811 case 'x': show_pax = 1; break; 2057 case 'x': show_pax = 1; break;
1812 case 'e': show_phdr = 1; break; 2058 case 'e': show_phdr = 1; break;
1813 case 't': show_textrel = 1; break; 2059 case 't': show_textrel = 1; break;
1814 case 'r': show_rpath = 1; break; 2060 case 'r': show_rpath = 1; break;
1815 case 'n': show_needed = 1; break; 2061 case 'n': show_needed = 1; break;
1824 } 2070 }
1825 2071
1826 /* construct our default format */ 2072 /* construct our default format */
1827 } else { 2073 } else {
1828 size_t fmt_len = 30; 2074 size_t fmt_len = 30;
1829 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2075 out_format = xmalloc(sizeof(char) * fmt_len);
2076 *out_format = '\0';
1830 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2077 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1831 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 2078 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
2079 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
2080 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
2081 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
2082 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
2083 if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1832 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2084 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1833 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2085 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1834 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2086 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1835 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2087 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1836 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2088 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1861 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1862 ret = scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1863 } 2115 }
1864 2116
1865 /* clean up */ 2117 /* clean up */
1866 free(versioned_symname);
1867 for (i = 0; ldpaths[i]; ++i)
1868 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1869 2123
1870 if (ldcache != 0) 2124 if (ldcache != 0)
1871 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1872 return ret; 2126 return ret;
1873} 2127}
1903 2157
1904 /* don't want to free(env) as it contains the memory that backs 2158 /* don't want to free(env) as it contains the memory that backs
1905 * the envvals array of strings */ 2159 * the envvals array of strings */
1906 return envvals; 2160 return envvals;
1907} 2161}
2162
1908static void parseenv() 2163static void parseenv(void)
1909{ 2164{
2165 color_init(false);
1910 qa_textrels = get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
1911 qa_execstack = get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
1912 qa_wx_load = get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
1913} 2169}
1914 2170
1915#ifdef __PAX_UTILS_CLEANUP 2171#ifdef __PAX_UTILS_CLEANUP
1916static void cleanup() 2172static void cleanup(void)
1917{ 2173{
1918 free(out_format); 2174 free(out_format);
1919 free(qa_textrels); 2175 free(qa_textrels);
1920 free(qa_execstack); 2176 free(qa_execstack);
1921 free(qa_wx_load); 2177 free(qa_wx_load);
1922} 2178}
1923#endif 2179#endif
1924
1925 2180
1926int main(int argc, char *argv[]) 2181int main(int argc, char *argv[])
1927{ 2182{
1928 int ret; 2183 int ret;
1929 if (argc < 2) 2184 if (argc < 2)
1938 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD"); 2193 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1939#endif 2194#endif
1940 return ret; 2195 return ret;
1941} 2196}
1942 2197
1943
1944
1945/* utility funcs */
1946static char *xstrdup(const char *s)
1947{
1948 char *ret = strdup(s);
1949 if (!ret) err("Could not strdup(): %s", strerror(errno));
1950 return ret;
1951}
1952static void *xmalloc(size_t size)
1953{
1954 void *ret = malloc(size);
1955 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1956 return ret;
1957}
1958static void *xrealloc(void *ptr, size_t size)
1959{
1960 void *ret = realloc(ptr, size);
1961 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
1962 return ret;
1963}
1964static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1965{
1966 size_t new_len;
1967
1968 new_len = strlen(*dst) + strlen(src);
1969 if (*curr_len <= new_len) {
1970 *curr_len = new_len + (*curr_len / 2);
1971 *dst = realloc(*dst, *curr_len);
1972 if (!*dst)
1973 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1974 }
1975
1976 if (n)
1977 strncat(*dst, src, n);
1978 else
1979 strcat(*dst, src);
1980}
1981static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1982{
1983 static char my_app[2];
1984 my_app[0] = append;
1985 my_app[1] = '\0';
1986 xstrcat(dst, my_app, curr_len);
1987}
1988
1989/* Match filename against entries in matchlist, return TRUE 2198/* Match filename against entries in matchlist, return TRUE
1990 * if the file is listed */ 2199 * if the file is listed */
1991static int file_matches_list(const char *filename, char **matchlist) 2200static int file_matches_list(const char *filename, char **matchlist)
1992{ 2201{
1993 char **file; 2202 char **file;

Legend:
Removed from v.1.170  
changed lines
  Added in v.1.229

  ViewVC Help
Powered by ViewVC 1.1.20