/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.129 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 1.129 2006/02/18 15:51:11 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 $";
11const char argv0[] = "scanelf";
12
10#include "paxinc.h" 13#include "paxinc.h"
11 14
12static const char *rcsid = "$Id: scanelf.c,v 1.129 2006/02/18 15:51:11 solar Exp $";
13#define argv0 "scanelf"
14
15#define IS_MODIFIER(c) (c == '%' || c == '#') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
16
17
18 16
19/* prototypes */ 17/* prototypes */
20static int scanelf_elfobj(elfobj *elf); 18static int file_matches_list(const char *filename, char **matchlist);
21static int scanelf_elf(const char *filename, int fd, size_t len);
22static int scanelf_archive(const char *filename, int fd, size_t len);
23static void scanelf_file(const char *filename);
24static void scanelf_dir(const char *path);
25static void scanelf_ldpath(void);
26static void scanelf_envpath(void);
27static void usage(int status);
28static void parseargs(int argc, char *argv[]);
29static char *xstrdup(const char *s);
30static void *xmalloc(size_t size);
31static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
32#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
33static inline void xchrcat(char **dst, const char append, size_t *curr_len);
34 19
35/* variables to control behavior */ 20/* variables to control behavior */
36static char match_etypes[126] = ""; 21static char *match_etypes = NULL;
37static char *ldpaths[256]; 22static array_t _ldpaths = array_init_decl, *ldpaths = &_ldpaths;
38static char scan_ldpath = 0; 23static char scan_ldpath = 0;
39static char scan_envpath = 0; 24static char scan_envpath = 0;
40static char scan_symlink = 1; 25static char scan_symlink = 1;
41static char scan_archives = 0; 26static char scan_archives = 0;
42static char dir_recurse = 0; 27static char dir_recurse = 0;
43static char dir_crossmount = 1; 28static char dir_crossmount = 1;
44static char show_pax = 0; 29static char show_pax = 0;
30static char show_perms = 0;
31static char show_size = 0;
45static char show_phdr = 0; 32static char show_phdr = 0;
46static char show_textrel = 0; 33static char show_textrel = 0;
47static char show_rpath = 0; 34static char show_rpath = 0;
48static char show_needed = 0; 35static char show_needed = 0;
49static char show_interp = 0; 36static char show_interp = 0;
50static char show_bind = 0; 37static char show_bind = 0;
51static char show_soname = 0; 38static char show_soname = 0;
52static char show_textrels = 0; 39static char show_textrels = 0;
53static char show_banner = 1; 40static char show_banner = 1;
41static char show_endian = 0;
42static char show_osabi = 0;
43static char show_eabi = 0;
54static char be_quiet = 0; 44static char be_quiet = 0;
55static char be_verbose = 0; 45static char be_verbose = 0;
56static char be_wewy_wewy_quiet = 0; 46static char be_wewy_wewy_quiet = 0;
57static char *find_sym = NULL, *versioned_symname = NULL; 47static char be_semi_verbose = 0;
48static char *find_sym = NULL;
58static char *find_lib = NULL; 49static char *find_lib = NULL;
50static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
59static char *find_section = NULL; 51static char *find_section = NULL;
52static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
60static char *out_format = NULL; 53static char *out_format = NULL;
61static char *search_path = NULL; 54static char *search_path = NULL;
62static char fix_elf = 0; 55static char fix_elf = 0;
63static char gmatch = 0; 56static char g_match = 0;
64static char use_ldcache = 0; 57static char use_ldcache = 0;
65 58
59static char **qa_textrels = NULL;
60static char **qa_execstack = NULL;
61static char **qa_wx_load = NULL;
62static char *root;
63
66int match_bits = 0; 64static int match_bits = 0;
67caddr_t ldcache = 0; 65static unsigned int match_perms = 0;
66static void *ldcache = NULL;
68size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
69unsigned long setpax = 0UL; 68static unsigned long setpax = 0UL;
69
70static int has_objdump = 0;
71
72/* find the path to a file by name */
73static char *which(const char *fname)
74{
75 static char fullpath[__PAX_UTILS_PATH_MAX];
76 char *path, *p;
77
78 path = getenv("PATH");
79 if (!path)
80 return NULL;
81
82 path = xstrdup(path);
83 while ((p = strrchr(path, ':')) != NULL) {
84 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
85 *p = 0;
86 if (access(fullpath, R_OK) != -1) {
87 free(path);
88 return fullpath;
89 }
90 }
91 free(path);
92 return NULL;
93}
94
95/* 1 on failure. 0 otherwise */
96static int rematch(const char *regex, const char *match, int cflags)
97{
98 regex_t preg;
99 int ret;
100
101 if ((match == NULL) || (regex == NULL))
102 return EXIT_FAILURE;
103
104 if ((ret = regcomp(&preg, regex, cflags))) {
105 char err[256];
106
107 if (regerror(ret, &preg, err, sizeof(err)))
108 fprintf(stderr, "regcomp failed: %s", err);
109 else
110 fprintf(stderr, "regcomp failed");
111
112 return EXIT_FAILURE;
113 }
114 ret = regexec(&preg, match, 0, NULL, 0);
115 regfree(&preg);
116
117 return ret;
118}
70 119
71/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
72static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
73{ 122{
74 /* 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
75#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
76 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
77 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
78 /* debug sections */ \
79 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
80 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
81 /* runtime sections */ \
82 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
83 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
84 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
85 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
86 } else { \ 138 } else \
87 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
88 } \
89 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
90 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
91 } else { \ 144 } else \
92 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
93 } \
94 } 146 }
95 GET_SYMTABS(32) 147 GET_SYMTABS(32)
96 GET_SYMTABS(64) 148 GET_SYMTABS(64)
97} 149}
98 150
128 } 180 }
129 SHOW_PAX(32) 181 SHOW_PAX(32)
130 SHOW_PAX(64) 182 SHOW_PAX(64)
131 } 183 }
132 184
133
134 if (fix_elf && setpax) { 185 if (fix_elf && setpax) {
135 /* set the chpax settings */ 186 /* set the chpax settings */
136 if (elf->elf_class == ELFCLASS32) { 187 if (elf->elf_class == ELFCLASS32) {
137 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)
138 ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax)); 189 ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
182 uint32_t flags, check_flags; \ 233 uint32_t flags, check_flags; \
183 if (elf->phdr != NULL) { \ 234 if (elf->phdr != NULL) { \
184 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 235 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
185 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \ 236 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
186 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 237 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
238 if (multi_stack++) \
187 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ 239 warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
240 if (file_matches_list(elf->filename, qa_execstack)) \
241 continue; \
188 found = found_phdr; \ 242 found = found_phdr; \
189 offset = 0; \ 243 offset = 0; \
190 check_flags = PF_X; \ 244 check_flags = PF_X; \
191 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \ 245 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
246 if (multi_relro++) \
192 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 247 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
193 found = found_relro; \ 248 found = found_relro; \
194 offset = 4; \ 249 offset = 4; \
195 check_flags = PF_X; \ 250 check_flags = PF_X; \
196 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 251 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
197 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) \
253 if (multi_load++ > max_pt_load) \
198 if (multi_load++ > max_pt_load) 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); \
255 if (file_matches_list(elf->filename, qa_wx_load)) \
256 continue; \
199 found = found_load; \ 257 found = found_load; \
200 offset = 8; \ 258 offset = 8; \
201 check_flags = PF_W|PF_X; \ 259 check_flags = PF_W|PF_X; \
202 } else \ 260 } else \
203 continue; \ 261 continue; \
204 flags = EGET(phdr[i].p_flags); \ 262 flags = EGET(phdr[i].p_flags); \
205 if (be_quiet && ((flags & check_flags) != check_flags)) \ 263 if (be_quiet && ((flags & check_flags) != check_flags)) \
206 continue; \ 264 continue; \
207 if (fix_elf && ((flags & PF_X) != flags)) { \ 265 if ((EGET(phdr[i].p_type) != PT_LOAD) && (fix_elf && ((flags & PF_X) != flags))) { \
208 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \ 266 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \
209 ret[3] = ret[7] = '!'; \ 267 ret[3] = ret[7] = '!'; \
210 flags = EGET(phdr[i].p_flags); \ 268 flags = EGET(phdr[i].p_flags); \
211 } \ 269 } \
212 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \ 270 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
216 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
217 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
218 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
219 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
220 char *str; \ 278 char *str; \
221 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
222 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
223 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
224 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
225 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
226 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
240 break; \ 298 break; \
241 } \ 299 } \
242 } \ 300 } \
243 skip_this_shdr##B: \ 301 skip_this_shdr##B: \
244 if (!multi_stack) { \ 302 if (!multi_stack) { \
303 if (file_matches_list(elf->filename, qa_execstack)) \
304 return NULL; \
245 *found_phdr = 1; \ 305 *found_phdr = 1; \
246 shown = 1; \ 306 shown = 1; \
247 memcpy(ret, "!WX", 3); \ 307 memcpy(ret, "!WX", 3); \
248 } \ 308 } \
249 } \ 309 } \
254 if (be_wewy_wewy_quiet || (be_quiet && !shown)) 314 if (be_wewy_wewy_quiet || (be_quiet && !shown))
255 return NULL; 315 return NULL;
256 else 316 else
257 return ret; 317 return ret;
258} 318}
319
320/*
321 * See if this ELF contains a DT_TEXTREL tag in any of its
322 * PT_DYNAMIC sections.
323 */
259static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 324static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
260{ 325{
261 static const char *ret = "TEXTREL"; 326 static const char *ret = "TEXTREL";
262 unsigned long i; 327 unsigned long i;
263 328
264 if (!show_textrel && !show_textrels) return NULL; 329 if (!show_textrel && !show_textrels) return NULL;
330
331 if (file_matches_list(elf->filename, qa_textrels)) return NULL;
265 332
266 if (elf->phdr) { 333 if (elf->phdr) {
267#define SHOW_TEXTREL(B) \ 334#define SHOW_TEXTREL(B) \
268 if (elf->elf_class == ELFCLASS ## B) { \ 335 if (elf->elf_class == ELFCLASS ## B) { \
269 Elf ## B ## _Dyn *dyn; \ 336 Elf ## B ## _Dyn *dyn; \
270 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 337 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
271 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 338 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
272 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
273 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
274 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; \
275 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
276 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
277 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
278 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
279 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)*/ \
280 *found_textrel = 1; \ 347 *found_textrel = 1; \
281 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
282 return (be_wewy_wewy_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
291 if (be_quiet || be_wewy_wewy_quiet) 358 if (be_quiet || be_wewy_wewy_quiet)
292 return NULL; 359 return NULL;
293 else 360 else
294 return " - "; 361 return " - ";
295} 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 */
296static 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)
297{ 370{
298 unsigned long s, r, rmax; 371 unsigned long s, r, rmax;
299 void *symtab_void, *strtab_void, *text_void; 372 void *symtab_void, *strtab_void, *text_void;
300 373
321 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
322 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
323 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
324 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
325 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
326 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
327 rela = NULL; \ 400 rela = NULL; \
328 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
329 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
330 rel = NULL; \ 403 rel = NULL; \
331 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
332 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
333 } else \ 406 } else \
334 continue; \ 407 continue; \
335 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
336 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
351 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
352 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
353 } else \ 426 } else \
354 *found_textrels = 1; \ 427 *found_textrels = 1; \
355 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
356 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
357 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
358 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
359 continue; \ 432 continue; \
360 } \ 433 } \
361 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
362 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
365 sym = NULL; \ 438 sym = NULL; \
366 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
367 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
368 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
369 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
370 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)); \
371 else \ 444 else \
372 printf("(memory/fake?)"); \ 445 printf("(memory/data?)"); \
373 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
374 /* 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 */ \
375 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
376 func = NULL; \ 449 func = NULL; \
377 offset_tmp = 0; \ 450 offset_tmp = 0; \
378 while (sym_max--) { \ 451 while (sym_max--) { \
379 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) { \
380 func = sym; \ 453 func = sym; \
381 offset_tmp = EGET(sym->st_value); \ 454 offset_tmp = EGET(sym->st_value); \
382 } \ 455 } \
383 ++sym; \ 456 ++sym; \
384 } \ 457 } \
385 printf(" in "); \ 458 printf(" in "); \
386 if (func && func->st_name) \ 459 if (func && func->st_name) { \
387 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \ 460 const char *func_name = elf->data + EGET(strtab->sh_offset) + EGET(func->st_name); \
461 if (r_offset > EGET(func->st_size)) \
462 printf("(optimized out: previous %s)", func_name); \
388 else \ 463 else \
389 printf("(NULL: fake?)"); \ 464 printf("%s", func_name); \
465 } else \
466 printf("(optimized out)"); \
390 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 467 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
468 if (be_verbose && has_objdump) { \
469 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
470 char *sysbuf; \
471 size_t syslen; \
472 int sysret; \
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"; \
474 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
475 sysbuf = xmalloc(syslen); \
476 if (end_addr < r_offset) \
477 /* not uncommon when things are optimized out */ \
478 end_addr = r_offset + 0x100; \
479 snprintf(sysbuf, syslen, sysfmt, \
480 (unsigned long)offset_tmp, \
481 (unsigned long)end_addr, \
482 elf->filename, \
483 (unsigned long)r_offset); \
484 fflush(stdout); \
485 sysret = system(sysbuf); \
486 fflush(stdout); \
487 free(sysbuf); \
488 } \
391 } \ 489 } \
392 } } 490 } }
393 SHOW_TEXTRELS(32) 491 SHOW_TEXTRELS(32)
394 SHOW_TEXTRELS(64) 492 SHOW_TEXTRELS(64)
395 } 493 }
397 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);
398 496
399 return NULL; 497 return NULL;
400} 498}
401 499
402static void rpath_security_checks(elfobj *, char *, const char *);
403static 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)
404{ 501{
405 struct stat st; 502 struct stat st;
406 switch (*item) { 503 switch (*item) {
407 case '/': break; 504 case '/': break;
413 warnf("Security problem NULL %s in %s", dt_type, elf->filename); 510 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
414 break; 511 break;
415 case '$': 512 case '$':
416 if (fstat(elf->fd, &st) != -1) 513 if (fstat(elf->fd, &st) != -1)
417 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 514 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
418 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",
419 dt_type, item, elf->filename, st.st_mode & 07777); 516 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
420 break; 517 break;
421 default: 518 default:
422 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);
423 break; 520 break;
424 } 521 }
425} 522}
426static 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)
427{ 524{
428 unsigned long i, s; 525 unsigned long i;
429 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
430 void *strtbl_void; 527 void *strtbl_void;
431 528
432 if (!show_rpath) return; 529 if (!show_rpath) return;
433 530
444 Elf ## B ## _Off offset; \ 541 Elf ## B ## _Off offset; \
445 Elf ## B ## _Xword word; \ 542 Elf ## B ## _Xword word; \
446 /* Scan all the program headers */ \ 543 /* Scan all the program headers */ \
447 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 544 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
448 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
449 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; \
450 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
451 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
452 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
453 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
454 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
455 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
456 r = &rpath; \ 553 r = &rpath; \
457 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
458 r = &runpath; \ 555 r = &runpath; \
462 } \ 559 } \
463 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
464 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
465 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
466 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
467 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
468 /* 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 */ \
469 if (fix_elf) \ 566 if (fix_elf) \
470 offset = strlen(*r); \ 567 offset = strlen(*r); \
471 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
472 if (be_quiet) { \ 569 if (be_quiet) { \
478 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
479 while (start) { \ 576 while (start) { \
480 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
481 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
482 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
483 if (use_ldcache) \ 580 if (use_ldcache) { \
484 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
485 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
486 *r = end; \ 585 *r = end; \
487 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
488 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
489 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
490 (*r)++; \ 589 (*r)++; \
491 break; \ 590 break; \
492 } \ 591 } \
592 } \
493 if (!*r || !end) \ 593 if (!*r || !end) \
494 break; \ 594 break; \
495 else \ 595 else \
496 start = start + len + 1; \ 596 start = start + len + 1; \
497 } \ 597 } \
582#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
583#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
584#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
585#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
586 686
587static char *lookup_cache_lib(elfobj *, char *); 687#if defined(__GLIBC__) || defined(__UCLIBC__)
688
588static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
589{ 690{
590 int fd = 0; 691 int fd;
591 char *strs; 692 char *strs;
592 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
593 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
594 struct stat st; 695 struct stat st;
595 696
596 typedef struct { 697 typedef struct {
597 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
598 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
608 libentry_t *libent; 709 libentry_t *libent;
609 710
610 if (fname == NULL) 711 if (fname == NULL)
611 return NULL; 712 return NULL;
612 713
613 if (ldcache == 0) { 714 if (ldcache == NULL) {
614 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)
615 return NULL; 720 return NULL;
616 721
617 /* 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 */
618 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
619 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
620
621 close(fd); 725 close(fd);
622 726
623 if (ldcache == (caddr_t)-1) { 727 if (ldcache == MAP_FAILED) {
624 ldcache = 0; 728 ldcache = NULL;
625 return NULL; 729 return NULL;
626 } 730 }
627 731
628 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;
629 return NULL; 737 return NULL;
630 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
631 return NULL;
632 } 738 }
739 } else
740 header = ldcache;
633 741
634 header = (header_t *) ldcache;
635 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
636 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
637 744
638 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
639 /* 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
640 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
641 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
642 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
643 continue; 751 continue;
644 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
645 continue; 753 continue;
646 754
647 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
648 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
649 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
650 } 761 }
762
651 return buf; 763 return buf;
652} 764}
653 765
766#elif defined(__NetBSD__)
767static char *lookup_cache_lib(elfobj *elf, char *fname)
768{
769 static char buf[__PAX_UTILS_PATH_MAX] = "";
770 static struct stat st;
771 size_t n;
772 char *ldpath;
773
774 array_for_each(ldpath, n, ldpath) {
775 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", ldpath, fname) >= sizeof(buf))
776 continue; /* if the pathname is too long, or something went wrong, ignore */
777
778 if (stat(buf, &st) != 0)
779 continue; /* if the lib doesn't exist in *ldpath, look further */
780
781 /* NetBSD doesn't actually do sanity checks, it just loads the file
782 * and if that doesn't work, continues looking in other directories.
783 * This cannot easily be safely emulated, unfortunately. For now,
784 * just assume that if it exists, it's a valid library. */
785
786 return buf;
787 }
788
789 /* not found in any path */
790 return NULL;
791}
792#else
793#ifdef __ELF__
794#warning Cache support not implemented for your target
795#endif
796static char *lookup_cache_lib(elfobj *elf, char *fname)
797{
798 return NULL;
799}
800#endif
654 801
655static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len) 802static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
656{ 803{
657 unsigned long i; 804 unsigned long i;
658 char *needed; 805 char *needed;
659 void *strtbl_void; 806 void *strtbl_void;
660 char *p; 807 char *p;
661 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
662 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
663 815
664 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
665 817
666 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
667#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
669 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
670 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
671 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
672 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
673 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 */ \
674 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
675 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; \
676 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
677 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 */ \
678 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
679 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
680 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
681 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
682 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
683 ++dyn; \ 840 ++dyn; \
684 continue; \ 841 continue; \
685 } \ 842 } \
686 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
687 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
688 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
689 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
690 if (use_ldcache) \ 848 if (use_ldcache) \
691 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
692 needed = p; \ 850 needed = p; \
693 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
694 } \ 852 } \
695 *found_needed = 1; \ 853 *found_needed = 1; \
696 } else { \ 854 } else { \
697 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)) { \
698 *found_lib = 1; \ 864 *found_lib = 1; \
699 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
700 } \ 866 } \
701 } \ 867 } \
702 } \ 868 } \
703 ++dyn; \ 869 ++dyn; \
704 } \ 870 } \
733} 899}
734static char *scanelf_file_bind(elfobj *elf, char *found_bind) 900static char *scanelf_file_bind(elfobj *elf, char *found_bind)
735{ 901{
736 unsigned long i; 902 unsigned long i;
737 struct stat s; 903 struct stat s;
904 char dynamic = 0;
738 905
739 if (!show_bind) return NULL; 906 if (!show_bind) return NULL;
740 if (!elf->phdr) return NULL; 907 if (!elf->phdr) return NULL;
741 908
742#define SHOW_BIND(B) \ 909#define SHOW_BIND(B) \
744 Elf ## B ## _Dyn *dyn; \ 911 Elf ## B ## _Dyn *dyn; \
745 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 912 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
746 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 913 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
747 Elf ## B ## _Off offset; \ 914 Elf ## B ## _Off offset; \
748 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
749 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; \
917 dynamic = 1; \
750 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
751 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
752 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
753 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
754 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
755 (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)) \
756 { \ 924 { \
757 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
765 SHOW_BIND(32) 933 SHOW_BIND(32)
766 SHOW_BIND(64) 934 SHOW_BIND(64)
767 935
768 if (be_wewy_wewy_quiet) return NULL; 936 if (be_wewy_wewy_quiet) return NULL;
769 937
938 /* don't output anything if quiet mode and the ELF is static or not setuid */
770 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) { 939 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
771 return NULL; 940 return NULL;
772 } else { 941 } else {
773 *found_bind = 1; 942 *found_bind = 1;
774 return (char *) "LAZY"; 943 return (char *)(dynamic ? "LAZY" : "STATIC");
775 } 944 }
776} 945}
777static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
778{ 947{
779 unsigned long i; 948 unsigned long i;
791 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 960 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
792 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 961 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
793 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 962 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
794 Elf ## B ## _Off offset; \ 963 Elf ## B ## _Off offset; \
795 /* only look for soname in shared objects */ \ 964 /* only look for soname in shared objects */ \
796 if (ehdr->e_type != ET_DYN) \ 965 if (EGET(ehdr->e_type) != ET_DYN) \
797 return NULL; \ 966 return NULL; \
798 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
799 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; \
800 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
801 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
802 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
803 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
804 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
805 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
806 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
807 ++dyn; \ 976 ++dyn; \
808 continue; \ 977 continue; \
809 } \ 978 } \
810 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
811 *found_soname = 1; \ 980 *found_soname = 1; \
812 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
813 } \ 982 } \
814 ++dyn; \ 983 ++dyn; \
815 } \ 984 } \
818 SHOW_SONAME(64) 987 SHOW_SONAME(64)
819 } 988 }
820 989
821 return NULL; 990 return NULL;
822} 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
823static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
824{ 1161{
825 unsigned long i; 1162 unsigned long i;
826 char *ret; 1163 char *ret;
827 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
828 1165
829 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
830 ret = find_sym; 1167 ret = NULL;
831 1168
832 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
833 1170
834 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
835#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
836 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
837 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
838 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
839 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)); \
840 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
841 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
842 if (cnt) \ 1180 if (cnt) \
843 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
844 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 } \
845 if (sym->st_name) { \ 1187 if (sym->st_name) { \
1188 /* make sure the symbol name is in acceptable memory range */ \
846 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
847 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
848 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
1192 ++sym; \
849 continue; \ 1193 continue; \
850 } \ 1194 } \
851 if (*find_sym == '*') { \ 1195 scanelf_match_symname(elf, found_sym, \
852 printf("%s(%s) %5lX %15s %s\n", \ 1196 &ret, &ret_len, symname, \
853 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
854 elf->base_filename, \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
855 (unsigned long)sym->st_size, \ 1199 EGET(sym->st_shndx), \
856 get_elfstttype(sym->st_info), \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
857 symname); \ 1201 EGET(sym->st_size)); \
858 *found_sym = 1; \
859 } else { \
860 char *this_sym, *next_sym; \
861 this_sym = find_sym; \
862 do { \
863 next_sym = strchr(this_sym, ','); \
864 if (next_sym == NULL) \
865 next_sym = this_sym + strlen(this_sym); \
866 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
867 (strcmp(symname, versioned_symname) == 0)) { \
868 ret = this_sym; \
869 (*found_sym)++; \
870 goto break_out; \
871 } \
872 this_sym = next_sym + 1; \
873 } while (*next_sym != '\0'); \
874 } \
875 } \ 1202 } \
876 ++sym; \ 1203 ++sym; \
877 } } 1204 } }
878 FIND_SYM(32) 1205 FIND_SYM(32)
879 FIND_SYM(64) 1206 FIND_SYM(64)
885 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
886 return ret; 1213 return ret;
887 if (be_quiet) 1214 if (be_quiet)
888 return NULL; 1215 return NULL;
889 else 1216 else
890 return (char *)" - "; 1217 return " - ";
891} 1218}
892 1219
893
894static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
895{ 1221{
896 if (!find_section) 1222 if (!find_section)
897 return NULL; 1223 return NULL;
898 1224
899#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
900 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1228 int invert; \
1229 const char *section_name; \
901 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1234 invert = (*section_name == '!' ? 1 : 0); \
902 section = SHDR ## B (elf_findsecbyname(elf, find_section)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
903 if (section != NULL) \ 1236 if ((section == NULL && invert) || (section != NULL && !invert)) \
1237 ++matched; \
1238 } \
1239 \
1240 if (matched == array_cnt(find_section_arr)) \
904 *found_section = 1; \ 1241 *found_section = 1; \
905 } 1242 }
906 FIND_SECTION(32) 1243 FIND_SECTION(32)
907 FIND_SECTION(64) 1244 FIND_SECTION(64)
908 1245
909
910 if (be_wewy_wewy_quiet) return NULL; 1246 if (be_wewy_wewy_quiet)
1247 return NULL;
911 1248
912 if (*found_section) 1249 if (*found_section)
913 return find_section; 1250 return find_section;
914 1251
915 if (be_quiet) 1252 if (be_quiet)
916 return NULL; 1253 return NULL;
917 else 1254 else
918 return (char *)" - "; 1255 return " - ";
919} 1256}
920 1257
921/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
922#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
923static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
924{ 1261{
925 unsigned long i; 1262 unsigned long i;
926 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
927 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
928 found_sym, found_lib, found_file, found_textrels, found_section; 1265 found_sym, found_lib, found_file, found_textrels, found_section;
929 static char *out_buffer = NULL; 1266 static char *out_buffer = NULL;
930 static size_t out_len; 1267 static size_t out_len;
931 1268
932 found_pax = found_phdr = found_relro = found_load = found_textrel = \ 1269 found_pax = found_phdr = found_relro = found_load = found_textrel = \
941 printf("%s: scanning file\n", elf->filename); 1278 printf("%s: scanning file\n", elf->filename);
942 1279
943 /* init output buffer */ 1280 /* init output buffer */
944 if (!out_buffer) { 1281 if (!out_buffer) {
945 out_len = sizeof(char) * 80; 1282 out_len = sizeof(char) * 80;
946 out_buffer = (char*)xmalloc(out_len); 1283 out_buffer = xmalloc(out_len);
947 } 1284 }
948 *out_buffer = '\0'; 1285 *out_buffer = '\0';
949 1286
950 /* show the header */ 1287 /* show the header */
951 if (!be_quiet && show_banner) { 1288 if (!be_quiet && show_banner) {
952 for (i = 0; out_format[i]; ++i) { 1289 for (i = 0; out_format[i]; ++i) {
953 if (!IS_MODIFIER(out_format[i])) continue; 1290 if (!IS_MODIFIER(out_format[i])) continue;
954 1291
955 switch (out_format[++i]) { 1292 switch (out_format[++i]) {
1293 case '+': break;
956 case '%': break; 1294 case '%': break;
957 case '#': break; 1295 case '#': break;
958 case 'F': 1296 case 'F':
959 case 'p': 1297 case 'p':
960 case 'f': prints("FILE "); found_file = 1; break; 1298 case 'f': prints("FILE "); found_file = 1; break;
961 case 'o': prints(" TYPE "); break; 1299 case 'o': prints(" TYPE "); break;
962 case 'x': prints(" PAX "); break; 1300 case 'x': prints(" PAX "); break;
963 case 'e': prints("STK/REL/PTL "); break; 1301 case 'e': prints("STK/REL/PTL "); break;
964 case 't': prints("TEXTREL "); break; 1302 case 't': prints("TEXTREL "); break;
965 case 'r': prints("RPATH "); break; 1303 case 'r': prints("RPATH "); break;
1304 case 'M': prints("CLASS "); break;
966 case 'n': prints("NEEDED "); break; 1305 case 'n': prints("NEEDED "); break;
967 case 'i': prints("INTERP "); break; 1306 case 'i': prints("INTERP "); break;
968 case 'b': prints("BIND "); break; 1307 case 'b': prints("BIND "); break;
1308 case 'Z': prints("SIZE "); break;
969 case 'S': prints("SONAME "); break; 1309 case 'S': prints("SONAME "); break;
970 case 's': prints("SYM "); break; 1310 case 's': prints("SYM "); break;
971 case 'N': prints("LIB "); break; 1311 case 'N': prints("LIB "); break;
972 case 'T': prints("TEXTRELS "); break; 1312 case 'T': prints("TEXTRELS "); break;
973 case 'k': prints("SECTION "); break; 1313 case 'k': prints("SECTION "); 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;
974 default: warnf("'%c' has no title ?", out_format[i]); 1319 default: warnf("'%c' has no title ?", out_format[i]);
975 } 1320 }
976 } 1321 }
977 if (!found_file) prints("FILE "); 1322 if (!found_file) prints("FILE ");
978 prints("\n"); 1323 prints("\n");
982 1327
983 /* dump all the good stuff */ 1328 /* dump all the good stuff */
984 for (i = 0; out_format[i]; ++i) { 1329 for (i = 0; out_format[i]; ++i) {
985 const char *out; 1330 const char *out;
986 const char *tmp; 1331 const char *tmp;
987 1332 static char ubuf[sizeof(unsigned long)*2];
988 if (!IS_MODIFIER(out_format[i])) { 1333 if (!IS_MODIFIER(out_format[i])) {
989 xchrcat(&out_buffer, out_format[i], &out_len); 1334 xchrcat(&out_buffer, out_format[i], &out_len);
990 continue; 1335 continue;
991 } 1336 }
992 1337
993 out = NULL; 1338 out = NULL;
994 be_wewy_wewy_quiet = (out_format[i] == '#'); 1339 be_wewy_wewy_quiet = (out_format[i] == '#');
1340 be_semi_verbose = (out_format[i] == '+');
995 switch (out_format[++i]) { 1341 switch (out_format[++i]) {
1342 case '+':
996 case '%': 1343 case '%':
997 case '#': 1344 case '#':
998 xchrcat(&out_buffer, out_format[i], &out_len); break; 1345 xchrcat(&out_buffer, out_format[i], &out_len); break;
999 case 'F': 1346 case 'F':
1000 found_file = 1; 1347 found_file = 1;
1026 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1373 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1027 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;
1028 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1029 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;
1030 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;
1031 case 'n': 1381 case 'n':
1032 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;
1033 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1034 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1035 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1036 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1386 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1037 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1387 case 'k': out = scanelf_file_sections(elf, &found_section); 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;;
1038 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1039 } 1393 }
1040 if (out) { 1394 if (out)
1041 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1042 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1043 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1044 else
1045 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1046 }
1047 } 1396 }
1048 1397
1049#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1050 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1051 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1083 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1084 goto label_done; 1433 goto label_done;
1085 break; 1434 break;
1086 default: break; 1435 default: break;
1087 } 1436 }
1088 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1089 char sbuf[126]; 1438 char sbuf[126];
1090 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1091 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1092 char *p; 1441 char *p;
1093 while((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1094 *p = 0; 1443 *p = 0;
1095 if (etype_lookup(p+1) == get_etype(elf)) 1444 if (etype_lookup(p+1) == get_etype(elf))
1096 goto label_ret; 1445 goto label_ret;
1097 } 1446 }
1098 } 1447 }
1118 1467
1119 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1120 if (ar == NULL) 1469 if (ar == NULL)
1121 return 1; 1470 return 1;
1122 1471
1123 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);
1124 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");
1125 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);
1126 if (elf) { 1478 if (elf) {
1127 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1128 unreadelf(elf); 1480 unreadelf(elf);
1129 } 1481 }
1130 } 1482 }
1131 munmap(ar_buffer, len); 1483 munmap(ar_buffer, len);
1132 1484
1133 return 0; 1485 return 0;
1134} 1486}
1135/* scan a file which may be an elf or an archive or some other magical beast */ 1487/* scan a file which may be an elf or an archive or some other magical beast */
1136static void scanelf_file(const char *filename) 1488static int scanelf_file(const char *filename, const struct stat *st_cache)
1137{ 1489{
1490 const struct stat *st = st_cache;
1138 struct stat st; 1491 struct stat symlink_st;
1139 int fd; 1492 int fd;
1140 1493
1141 /* make sure 'filename' exists */
1142 if (lstat(filename, &st) == -1) {
1143 if (be_verbose > 2) printf("%s: does not exist\n", filename);
1144 return;
1145 }
1146
1147 /* always handle regular files and handle symlinked files if no -y */ 1494 /* always handle regular files and handle symlinked files if no -y */
1148 if (S_ISLNK(st.st_mode)) { 1495 if (S_ISLNK(st->st_mode)) {
1149 if (!scan_symlink) return; 1496 if (!scan_symlink) return 1;
1150 stat(filename, &st); 1497 stat(filename, &symlink_st);
1498 st = &symlink_st;
1151 } 1499 }
1500
1152 if (!S_ISREG(st.st_mode)) { 1501 if (!S_ISREG(st->st_mode)) {
1153 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1502 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1154 return; 1503 return 1;
1155 } 1504 }
1156 1505
1506 if (match_perms) {
1507 if ((st->st_mode | match_perms) != st->st_mode)
1508 return 1;
1509 }
1157 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1510 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1158 return; 1511 return 1;
1159 1512
1160 if (scanelf_elf(filename, fd, st.st_size) == 1 && scan_archives) 1513 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1161 /* 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 */
1162 scanelf_archive(filename, fd, st.st_size); 1515 scanelf_archive(filename, fd, st->st_size);
1163 1516
1164 close(fd); 1517 close(fd);
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;
1165} 1529}
1166 1530
1167/* 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 */
1168static void scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1169{ 1533{
1170 register DIR *dir; 1534 register DIR *dir;
1171 register struct dirent *dentry; 1535 register struct dirent *dentry;
1172 struct stat st_top, st; 1536 struct stat st_top, st;
1173 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1174 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1175 1543
1176 /* make sure path exists */ 1544 /* make sure path exists */
1177 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1178 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1179 return; 1547 return 1;
1180 } 1548 }
1181 1549
1182 /* ok, if it isn't a directory, assume we can open it */ 1550 /* ok, if it isn't a directory, assume we can open it */
1183 if (!S_ISDIR(st_top.st_mode)) { 1551 if (!S_ISDIR(st_top.st_mode)) {
1184 scanelf_file(path); 1552 return scanelf_file(path, &st_top);
1185 return;
1186 } 1553 }
1187 1554
1188 /* now scan the dir looking for fun stuff */ 1555 /* now scan the dir looking for fun stuff */
1189 if ((dir = opendir(path)) == NULL) { 1556 if ((dir = opendir(path)) == NULL) {
1190 warnf("could not opendir %s: %s", path, strerror(errno)); 1557 warnf("could not opendir %s: %s", path, strerror(errno));
1191 return; 1558 return 1;
1192 } 1559 }
1193 if (be_verbose > 1) printf("%s: scanning dir\n", path); 1560 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1194 1561
1195 pathlen = strlen(path); 1562 pathlen = strlen(path);
1196 while ((dentry = readdir(dir))) { 1563 while ((dentry = readdir(dir))) {
1200 if (len >= sizeof(buf)) { 1567 if (len >= sizeof(buf)) {
1201 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, 1568 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1202 (unsigned long)len, (unsigned long)sizeof(buf)); 1569 (unsigned long)len, (unsigned long)sizeof(buf));
1203 continue; 1570 continue;
1204 } 1571 }
1205 sprintf(buf, "%s/%s", path, dentry->d_name); 1572 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
1206 if (lstat(buf, &st) != -1) { 1573 if (lstat(buf, &st) != -1) {
1207 if (S_ISREG(st.st_mode)) 1574 if (S_ISREG(st.st_mode))
1208 scanelf_file(buf); 1575 ret = scanelf_file(buf, &st);
1209 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1576 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1210 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1577 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1211 scanelf_dir(buf); 1578 ret = scanelf_dir(buf);
1212 } 1579 }
1213 } 1580 }
1214 } 1581 }
1215 closedir(dir); 1582 closedir(dir);
1583 return ret;
1216} 1584}
1217 1585
1218static int scanelf_from_file(char *filename) 1586static int scanelf_from_file(const char *filename)
1219{ 1587{
1220 FILE *fp = NULL; 1588 FILE *fp = NULL;
1221 char *p; 1589 char *p;
1222 char path[__PAX_UTILS_PATH_MAX]; 1590 char path[__PAX_UTILS_PATH_MAX];
1591 int ret = 0;
1223 1592
1224 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) 1593 if (strcmp(filename, "-") == 0)
1225 fp = stdin; 1594 fp = stdin;
1226 else if ((fp = fopen(filename, "r")) == NULL) 1595 else if ((fp = fopen(filename, "r")) == NULL)
1227 return 1; 1596 return 1;
1228 1597
1229 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1598 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1230 if ((p = strchr(path, '\n')) != NULL) 1599 if ((p = strchr(path, '\n')) != NULL)
1231 *p = 0; 1600 *p = 0;
1232 search_path = path; 1601 search_path = path;
1233 scanelf_dir(path); 1602 ret = scanelf_dir(path);
1234 } 1603 }
1235 if (fp != stdin) 1604 if (fp != stdin)
1236 fclose(fp); 1605 fclose(fp);
1237 return 0; 1606 return ret;
1238} 1607}
1239 1608
1609#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1610
1240static int load_ld_so_conf(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1241{ 1612{
1242 FILE *fp = NULL; 1613 FILE *fp = NULL;
1243 char *p; 1614 char *p;
1244 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1245 1617
1246 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1247 return i;
1248 1619
1249 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1250 return i; 1621 return i;
1251 1622
1252 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1253 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1254 *p = 0; 1625 *p = 0;
1255 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1256 *p = 0; 1627 *p = 0;
1257#ifdef HAVE_GLOB 1628
1258 // recursive includes of the same file will make this segfault. 1629 /* recursive includes of the same file will make this segfault. */
1259 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1260 glob64_t gl; 1631 glob_t gl;
1261 size_t x; 1632 size_t x;
1262 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1263 1634
1264 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1265 1638
1266 if (path[8] != '/') 1639 if (path[8] != '/')
1267 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1268 else 1641 else
1269 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1270 1643
1271 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1272 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1273 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1274 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1275 continue; 1648 continue;
1276 i = load_ld_so_conf(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1277 if (i + 1 >= sizeof(ldpaths) / sizeof(*ldpaths)) {
1278 globfree64(&gl);
1279 return i;
1280 }
1281 } 1650 }
1282 globfree64 (&gl); 1651 globfree(&gl);
1283 continue; 1652 continue;
1284 } else
1285 abort();
1286 } 1653 }
1287#endif 1654 }
1655
1288 if (*path != '/') 1656 if (*path != '/')
1289 continue; 1657 continue;
1290 1658
1291 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1292
1293 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
1294 break;
1295 } 1660 }
1296 ldpaths[i] = NULL;
1297 1661
1298 fclose(fp); 1662 fclose(fp);
1299 return i; 1663 return i;
1300} 1664}
1301 1665
1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1667
1668static int load_ld_cache_config(int i, const char *fname)
1669{
1670 FILE *fp = NULL;
1671 char *b = NULL, *p;
1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1674
1675 fname = maybe_add_root(fname, _fname);
1676
1677 if ((fp = fopen(fname, "r")) == NULL)
1678 return i;
1679
1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1681 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1682 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1683 {
1684 fclose(fp);
1685 return i;
1686 }
1687
1688 b = xmalloc(hdr.dirlistlen + 1);
1689 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1690 fclose(fp);
1691 free(b);
1692 return i;
1693 }
1694
1695 while ((p = strsep(&b, ":"))) {
1696 if (*p == '\0')
1697 continue;
1698 xarraypush(ldpaths, p, strlen(p));
1699 }
1700
1701 free(b);
1702 fclose(fp);
1703 return i;
1704}
1705
1706#else
1707#ifdef __ELF__
1708#warning Cache config support not implemented for your target
1709#endif
1710static int load_ld_cache_config(int i, const char *fname)
1711{
1712 return 0;
1713}
1714#endif
1715
1302/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1303static void scanelf_ldpath() 1717static void scanelf_ldpath(void)
1304{ 1718{
1305 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1306 int i = 0; 1722 int i = 0;
1307 1723
1308 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1309 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1310 1726
1311 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1312 1728
1313 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1314 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1315 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1316 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1317 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1318 ++i; 1734 ++i;
1319 } 1735 }
1320 1736
1321 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1322 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1323 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1739 if (!scan_ull) scanelf_dir("/usr/local/lib");
1324} 1740}
1325 1741
1326/* scan env PATH for paths */ 1742/* scan env PATH for paths */
1327static void scanelf_envpath() 1743static void scanelf_envpath(void)
1328{ 1744{
1329 char *path, *p; 1745 char *path, *p;
1330 1746
1331 path = getenv("PATH"); 1747 path = getenv("PATH");
1332 if (!path) 1748 if (!path)
1339 } 1755 }
1340 1756
1341 free(path); 1757 free(path);
1342} 1758}
1343 1759
1344/* usage / invocation handling functions */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1345#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"
1346#define a_argument required_argument 1762#define a_argument required_argument
1347static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1348 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1349 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1350 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1351 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1352 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1353 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1354 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1367 {"lib", a_argument, NULL, 'N'}, 1784 {"lib", a_argument, NULL, 'N'},
1368 {"gmatch", no_argument, NULL, 'g'}, 1785 {"gmatch", no_argument, NULL, 'g'},
1369 {"textrels", no_argument, NULL, 'T'}, 1786 {"textrels", no_argument, NULL, 'T'},
1370 {"etype", a_argument, NULL, 'E'}, 1787 {"etype", a_argument, NULL, 'E'},
1371 {"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'},
1372 {"all", no_argument, NULL, 'a'}, 1794 {"all", no_argument, NULL, 'a'},
1373 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1374 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1375 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1376 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1377 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1378 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1379 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1380 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1381 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1382}; 1805};
1383 1806
1384static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1385 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1386 "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)",
1387 "Scan directories recursively", 1811 "Scan directories recursively",
1388 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1389 "Don't scan symlinks", 1813 "Don't scan symlinks",
1390 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1391 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1400 "Print BIND information", 1824 "Print BIND information",
1401 "Print SONAME information", 1825 "Print SONAME information",
1402 "Find a specified symbol", 1826 "Find a specified symbol",
1403 "Find a specified section", 1827 "Find a specified section",
1404 "Find a specified library", 1828 "Find a specified library",
1405 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1406 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1407 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1408 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1409 "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",
1410 "Only output 'bad' things", 1839 "Only output 'bad' things",
1411 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1412 "Use specified format for output", 1841 "Use specified format for output",
1413 "Read input stream from a filename", 1842 "Read input stream from a filename",
1414 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1415 "Don't display the header", 1845 "Don't display the header",
1416 "Print this help and exit", 1846 "Print this help and exit",
1417 "Print version and exit", 1847 "Print version and exit",
1418 NULL 1848 NULL
1419}; 1849};
1425 printf("* Scan ELF binaries for stuff\n\n" 1855 printf("* Scan ELF binaries for stuff\n\n"
1426 "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);
1427 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1428 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1429 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1430 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",
1431 long_opts[i].name, opts_help[i]); 1864 long_opts[i].name, opts_help[i]);
1432 else 1865 else
1433 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1434 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1435 1868
1436 if (status != EXIT_SUCCESS) 1869 puts("\nFor more information, see the scanelf(1) manpage");
1437 exit(status);
1438
1439 puts("\nThe format modifiers for the -F option are:");
1440 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1441 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1442 puts(" i INTERP \tb BIND \ts symbol");
1443 puts(" N library \to Type \tT TEXTRELs");
1444 puts(" S SONAME \tk section");
1445 puts(" p filename (with search path removed)");
1446 puts(" f filename (short name/basename)");
1447 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1448
1449 puts("\nELF Etypes:");
1450 print_etypes(stdout);
1451
1452 exit(status); 1870 exit(status);
1453} 1871}
1454 1872
1455/* parse command line arguments and preform needed actions */ 1873/* parse command line arguments and preform needed actions */
1874#define do_pax_state(option, flag) \
1875 if (islower(option)) { \
1876 flags &= ~PF_##flag; \
1877 flags |= PF_NO##flag; \
1878 } else { \
1879 flags &= ~PF_NO##flag; \
1880 flags |= PF_##flag; \
1881 }
1456static void parseargs(int argc, char *argv[]) 1882static int parseargs(int argc, char *argv[])
1457{ 1883{
1458 int i; 1884 int i;
1459 char *from_file = NULL; 1885 const char *from_file = NULL;
1886 int ret = 0;
1460 1887
1461 opterr = 0; 1888 opterr = 0;
1462 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 1889 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1463 switch (i) { 1890 switch (i) {
1464 1891
1472 case 'f': 1899 case 'f':
1473 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");
1474 from_file = optarg; 1901 from_file = optarg;
1475 break; 1902 break;
1476 case 'E': 1903 case 'E':
1477 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1478 break; 1905 break;
1479 case 'M': 1906 case 'M':
1480 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;
1481 break; 1918 break;
1482 case 'o': { 1919 case 'o': {
1483 FILE *fp = NULL;
1484 if ((fp = freopen(optarg, "w", stdout)) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1485 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1486 SET_STDOUT(fp);
1487 break; 1922 break;
1488 } 1923 }
1489 case 'k': 1924 case 'k':
1490 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1491 find_section = optarg;
1492 break; 1926 break;
1493 case 's': { 1927 case 's': {
1494 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");
1495 find_sym = optarg; 1929 find_sym = optarg;
1496 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1497 sprintf(versioned_symname, "%s@", find_sym);
1498 break; 1930 break;
1499 } 1931 }
1500 case 'N': { 1932 case 'N':
1501 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1502 find_lib = optarg;
1503 break; 1934 break;
1504 }
1505
1506 case 'F': { 1935 case 'F': {
1507 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");
1508 out_format = optarg; 1937 out_format = optarg;
1509 break; 1938 break;
1510 } 1939 }
1511 case 'z': { 1940 case 'z': {
1512 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1941 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1513 size_t x; 1942 size_t x;
1514 1943
1515#define do_state(option, flag) \
1516 if (islower(option)) { \
1517 flags &= ~PF_##flag; \
1518 flags |= PF_NO##flag; \
1519 } else { \
1520 flags &= ~PF_NO##flag; \
1521 flags |= PF_##flag; \
1522 }
1523
1524 for (x = 0 ; x < strlen(optarg); x++) { 1944 for (x = 0; x < strlen(optarg); x++) {
1525 switch(optarg[x]) { 1945 switch (optarg[x]) {
1526 case 'p': 1946 case 'p':
1527 case 'P': 1947 case 'P':
1528 do_state(optarg[x], PAGEEXEC); 1948 do_pax_state(optarg[x], PAGEEXEC);
1529 break; 1949 break;
1530 case 's': 1950 case 's':
1531 case 'S': 1951 case 'S':
1532 do_state(optarg[x], SEGMEXEC); 1952 do_pax_state(optarg[x], SEGMEXEC);
1533 break; 1953 break;
1534 case 'm': 1954 case 'm':
1535 case 'M': 1955 case 'M':
1536 do_state(optarg[x], MPROTECT); 1956 do_pax_state(optarg[x], MPROTECT);
1537 break; 1957 break;
1538 case 'e': 1958 case 'e':
1539 case 'E': 1959 case 'E':
1540 do_state(optarg[x], EMUTRAMP); 1960 do_pax_state(optarg[x], EMUTRAMP);
1541 break; 1961 break;
1542 case 'r': 1962 case 'r':
1543 case 'R': 1963 case 'R':
1544 do_state(optarg[x], RANDMMAP); 1964 do_pax_state(optarg[x], RANDMMAP);
1545 break; 1965 break;
1546 case 'x': 1966 case 'x':
1547 case 'X': 1967 case 'X':
1548 do_state(optarg[x], RANDEXEC); 1968 do_pax_state(optarg[x], RANDEXEC);
1549 break; 1969 break;
1550 default: 1970 default:
1551 break; 1971 break;
1552 } 1972 }
1553 } 1973 }
1558 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1978 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1559 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1979 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1560 setpax = flags; 1980 setpax = flags;
1561 break; 1981 break;
1562 } 1982 }
1983 case 'Z': show_size = 1; break;
1563 case 'g': gmatch = 1; break; 1984 case 'g': g_match = 1; break;
1564 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1565 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1566 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1567 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1568 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1569 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1570 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1571 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1579 case 'b': show_bind = 1; break; 2001 case 'b': show_bind = 1; break;
1580 case 'S': show_soname = 1; break; 2002 case 'S': show_soname = 1; break;
1581 case 'T': show_textrels = 1; break; 2003 case 'T': show_textrels = 1; break;
1582 case 'q': be_quiet = 1; break; 2004 case 'q': be_quiet = 1; break;
1583 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1584 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;
1585 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;
1586 case ':': 2013 case ':':
1587 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1588 case '?': 2015 case '?':
1589 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1590 default: 2017 default:
1591 err("Unhandled option '%c'; please report this", i); 2018 err("Unhandled option '%c'; please report this", i);
1592 } 2019 }
1593 } 2020 }
1594 2021 if (show_textrels && be_verbose) {
2022 if (which("objdump") != NULL)
2023 has_objdump = 1;
2024 }
2025 /* flatten arrays for display */
2026 if (array_cnt(find_lib_arr))
2027 find_lib = array_flatten_str(find_lib_arr);
2028 if (array_cnt(find_section_arr))
2029 find_section = array_flatten_str(find_section_arr);
1595 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1596 if (out_format) { 2031 if (out_format) {
1597 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1598 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1599 show_textrels = 0; 2034 show_textrels = show_perms = show_endian = show_size = \
2035 show_osabi = show_eabi = 0;
1600 for (i = 0; out_format[i]; ++i) { 2036 for (i = 0; out_format[i]; ++i) {
1601 if (!IS_MODIFIER(out_format[i])) continue; 2037 if (!IS_MODIFIER(out_format[i])) continue;
1602 2038
1603 switch (out_format[++i]) { 2039 switch (out_format[++i]) {
2040 case '+': break;
1604 case '%': break; 2041 case '%': break;
1605 case '#': break; 2042 case '#': break;
1606 case 'F': break; 2043 case 'F': break;
1607 case 'p': break; 2044 case 'p': break;
1608 case 'f': break; 2045 case 'f': break;
1609 case 'k': break; 2046 case 'k': break;
1610 case 's': break; 2047 case 's': break;
1611 case 'N': break; 2048 case 'N': break;
1612 case 'o': break; 2049 case 'o': 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;
1613 case 'x': show_pax = 1; break; 2057 case 'x': show_pax = 1; break;
1614 case 'e': show_phdr = 1; break; 2058 case 'e': show_phdr = 1; break;
1615 case 't': show_textrel = 1; break; 2059 case 't': show_textrel = 1; break;
1616 case 'r': show_rpath = 1; break; 2060 case 'r': show_rpath = 1; break;
1617 case 'n': show_needed = 1; break; 2061 case 'n': show_needed = 1; break;
1618 case 'i': show_interp = 1; break; 2062 case 'i': show_interp = 1; break;
1619 case 'b': show_bind = 1; break; 2063 case 'b': show_bind = 1; break;
1620 case 'S': show_soname = 1; break; 2064 case 'S': show_soname = 1; break;
1621 case 'T': show_textrels = 1; break; 2065 case 'T': show_textrels = 1; break;
1622 default: 2066 default:
1623 err("Invalid format specifier '%c' (byte %i)", 2067 err("Invalid format specifier '%c' (byte %i)",
1624 out_format[i], i+1); 2068 out_format[i], i+1);
1625 } 2069 }
1626 } 2070 }
1627 2071
1628 /* construct our default format */ 2072 /* construct our default format */
1629 } else { 2073 } else {
1630 size_t fmt_len = 30; 2074 size_t fmt_len = 30;
1631 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2075 out_format = xmalloc(sizeof(char) * fmt_len);
2076 *out_format = '\0';
1632 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2077 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1633 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);
1634 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2084 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1635 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2085 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1636 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2086 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1637 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2087 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1638 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2088 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1646 } 2096 }
1647 if (be_verbose > 2) printf("Format: %s\n", out_format); 2097 if (be_verbose > 2) printf("Format: %s\n", out_format);
1648 2098
1649 /* now lets actually do the scanning */ 2099 /* now lets actually do the scanning */
1650 if (scan_ldpath || use_ldcache) 2100 if (scan_ldpath || use_ldcache)
1651 load_ld_so_conf(0, "/etc/ld.so.conf"); 2101 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1652 if (scan_ldpath) scanelf_ldpath(); 2102 if (scan_ldpath) scanelf_ldpath();
1653 if (scan_envpath) scanelf_envpath(); 2103 if (scan_envpath) scanelf_envpath();
2104 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
2105 from_file = "-";
1654 if (from_file) { 2106 if (from_file) {
1655 scanelf_from_file(from_file); 2107 scanelf_from_file(from_file);
1656 from_file = *argv; 2108 from_file = *argv;
1657 } 2109 }
1658 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 2110 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1659 err("Nothing to scan !?"); 2111 err("Nothing to scan !?");
1660 while (optind < argc) { 2112 while (optind < argc) {
1661 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1662 scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1663 } 2115 }
1664 2116
1665 /* clean up */ 2117 /* clean up */
1666 if (versioned_symname) free(versioned_symname);
1667 for (i = 0; ldpaths[i]; ++i)
1668 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1669 2123
1670 if (ldcache != 0) 2124 if (ldcache != 0)
1671 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1672}
1673
1674
1675
1676/* utility funcs */
1677static char *xstrdup(const char *s)
1678{
1679 char *ret = strdup(s);
1680 if (!ret) err("Could not strdup(): %s", strerror(errno));
1681 return ret; 2126 return ret;
1682} 2127}
1683static void *xmalloc(size_t size)
1684{
1685 void *ret = malloc(size);
1686 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1687 return ret;
1688}
1689static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1690{
1691 size_t new_len;
1692 2128
1693 new_len = strlen(*dst) + strlen(src); 2129static char **get_split_env(const char *envvar)
1694 if (*curr_len <= new_len) {
1695 *curr_len = new_len + (*curr_len / 2);
1696 *dst = realloc(*dst, *curr_len);
1697 if (!*dst)
1698 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1699 }
1700
1701 if (n)
1702 strncat(*dst, src, n);
1703 else
1704 strcat(*dst, src);
1705}
1706static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1707{ 2130{
1708 static char my_app[2]; 2131 const char *delims = " \t\n";
1709 my_app[0] = append; 2132 char **envvals = NULL;
1710 my_app[1] = '\0'; 2133 char *env, *s;
1711 xstrcat(dst, my_app, curr_len); 2134 int nentry;
1712}
1713 2135
2136 if ((env = getenv(envvar)) == NULL)
2137 return NULL;
1714 2138
2139 env = xstrdup(env);
2140 if (env == NULL)
2141 return NULL;
2142
2143 s = strtok(env, delims);
2144 if (s == NULL) {
2145 free(env);
2146 return NULL;
2147 }
2148
2149 nentry = 0;
2150 while (s != NULL) {
2151 ++nentry;
2152 envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
2153 envvals[nentry-1] = s;
2154 s = strtok(NULL, delims);
2155 }
2156 envvals[nentry] = NULL;
2157
2158 /* don't want to free(env) as it contains the memory that backs
2159 * the envvals array of strings */
2160 return envvals;
2161}
2162
2163static void parseenv(void)
2164{
2165 color_init(false);
2166 qa_textrels = get_split_env("QA_TEXTRELS");
2167 qa_execstack = get_split_env("QA_EXECSTACK");
2168 qa_wx_load = get_split_env("QA_WX_LOAD");
2169}
2170
2171#ifdef __PAX_UTILS_CLEANUP
2172static void cleanup(void)
2173{
2174 free(out_format);
2175 free(qa_textrels);
2176 free(qa_execstack);
2177 free(qa_wx_load);
2178}
2179#endif
1715 2180
1716int main(int argc, char *argv[]) 2181int main(int argc, char *argv[])
1717{ 2182{
2183 int ret;
1718 if (argc < 2) 2184 if (argc < 2)
1719 usage(EXIT_FAILURE); 2185 usage(EXIT_FAILURE);
2186 parseenv();
1720 parseargs(argc, argv); 2187 ret = parseargs(argc, argv);
1721 fclose(stdout); 2188 fclose(stdout);
1722#ifdef __BOUNDS_CHECKING_ON 2189#ifdef __PAX_UTILS_CLEANUP
1723 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()"); 2190 cleanup();
2191 warn("The calls to add/delete heap should be off:\n"
2192 "\t- 1 due to the out_buffer not being freed in scanelf_file()\n"
2193 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1724#endif 2194#endif
1725 return EXIT_SUCCESS; 2195 return ret;
1726} 2196}
2197
2198/* Match filename against entries in matchlist, return TRUE
2199 * if the file is listed */
2200static int file_matches_list(const char *filename, char **matchlist)
2201{
2202 char **file;
2203 char *match;
2204 char buf[__PAX_UTILS_PATH_MAX];
2205
2206 if (matchlist == NULL)
2207 return 0;
2208
2209 for (file = matchlist; *file != NULL; file++) {
2210 if (search_path) {
2211 snprintf(buf, sizeof(buf), "%s%s", search_path, *file);
2212 match = buf;
2213 } else {
2214 match = *file;
2215 }
2216 if (fnmatch(match, filename, 0) == 0)
2217 return 1;
2218 }
2219 return 0;
2220}

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