/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.149 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 1.149 2006/05/14 21:21:35 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $
5 * 5 *
6 * Copyright 2003-2006 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2006 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10static const char *rcsid = "$Id: scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $";
11const char argv0[] = "scanelf";
12
10#include "paxinc.h" 13#include "paxinc.h"
11 14
12static const char *rcsid = "$Id: scanelf.c,v 1.149 2006/05/14 21:21:35 vapier Exp $";
13#define argv0 "scanelf"
14
15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
16
17#define do_state(option, flag) \
18 if (islower(option)) { \
19 flags &= ~PF_##flag; \
20 flags |= PF_NO##flag; \
21 } else { \
22 flags &= ~PF_NO##flag; \
23 flags |= PF_##flag; \
24 }
25
26 16
27/* prototypes */ 17/* prototypes */
28static int file_matches_list(const char *filename, char **matchlist); 18static int file_matches_list(const char *filename, char **matchlist);
29static int scanelf_elfobj(elfobj *elf);
30static int scanelf_elf(const char *filename, int fd, size_t len);
31static int scanelf_archive(const char *filename, int fd, size_t len);
32static void scanelf_file(const char *filename);
33static void scanelf_dir(const char *path);
34static void scanelf_ldpath(void);
35static void scanelf_envpath(void);
36static void usage(int status);
37static char **get_split_env(const char *envvar);
38static void parseenv(void);
39static void parseargs(int argc, char *argv[]);
40static char *xstrdup(const char *s);
41static void *xmalloc(size_t size);
42static void *xrealloc(void *ptr, size_t size);
43static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
44#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
45static inline void xchrcat(char **dst, const char append, size_t *curr_len);
46 19
47/* variables to control behavior */ 20/* variables to control behavior */
48static char match_etypes[126] = ""; 21static char *match_etypes = NULL;
49static char *ldpaths[256]; 22static array_t _ldpaths = array_init_decl, *ldpaths = &_ldpaths;
50static char scan_ldpath = 0; 23static char scan_ldpath = 0;
51static char scan_envpath = 0; 24static char scan_envpath = 0;
52static char scan_symlink = 1; 25static char scan_symlink = 1;
53static char scan_archives = 0; 26static char scan_archives = 0;
54static char dir_recurse = 0; 27static char dir_recurse = 0;
55static char dir_crossmount = 1; 28static char dir_crossmount = 1;
56static char show_pax = 0; 29static char show_pax = 0;
30static char show_perms = 0;
31static char show_size = 0;
57static char show_phdr = 0; 32static char show_phdr = 0;
58static char show_textrel = 0; 33static char show_textrel = 0;
59static char show_rpath = 0; 34static char show_rpath = 0;
60static char show_needed = 0; 35static char show_needed = 0;
61static char show_interp = 0; 36static char show_interp = 0;
62static char show_bind = 0; 37static char show_bind = 0;
63static char show_soname = 0; 38static char show_soname = 0;
64static char show_textrels = 0; 39static char show_textrels = 0;
65static char show_banner = 1; 40static char show_banner = 1;
41static char show_endian = 0;
42static char show_osabi = 0;
43static char show_eabi = 0;
66static char be_quiet = 0; 44static char be_quiet = 0;
67static char be_verbose = 0; 45static char be_verbose = 0;
68static char be_wewy_wewy_quiet = 0; 46static char be_wewy_wewy_quiet = 0;
69static char be_semi_verbose = 0; 47static char be_semi_verbose = 0;
70static char *find_sym = NULL, *versioned_symname = NULL; 48static char *find_sym = NULL;
71static char *find_lib = NULL; 49static char *find_lib = NULL;
50static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
72static char *find_section = NULL; 51static char *find_section = NULL;
52static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
73static char *out_format = NULL; 53static char *out_format = NULL;
74static char *search_path = NULL; 54static char *search_path = NULL;
75static char fix_elf = 0; 55static char fix_elf = 0;
76static char gmatch = 0; 56static char g_match = 0;
77static char use_ldcache = 0; 57static char use_ldcache = 0;
78 58
79static char **qa_textrels = NULL; 59static char **qa_textrels = NULL;
80static char **qa_execstack = NULL; 60static char **qa_execstack = NULL;
81static char **qa_wx_load = NULL; 61static char **qa_wx_load = NULL;
62static char *root;
82 63
83int match_bits = 0; 64static int match_bits = 0;
84caddr_t ldcache = 0; 65static unsigned int match_perms = 0;
66static void *ldcache = NULL;
85size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
86unsigned long setpax = 0UL; 68static unsigned long setpax = 0UL;
87 69
88/* utility funcs */ 70static int has_objdump = 0;
71
72/* find the path to a file by name */
89static char *xstrdup(const char *s) 73static char *which(const char *fname)
90{ 74{
91 char *ret = strdup(s); 75 static char fullpath[__PAX_UTILS_PATH_MAX];
92 if (!ret) err("Could not strdup(): %s", strerror(errno)); 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
93 return ret; 117 return ret;
94}
95static void *xmalloc(size_t size)
96{
97 void *ret = malloc(size);
98 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
99 return ret;
100}
101static void *xrealloc(void *ptr, size_t size)
102{
103 void *ret = realloc(ptr, size);
104 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
105 return ret;
106}
107static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
108{
109 size_t new_len;
110
111 new_len = strlen(*dst) + strlen(src);
112 if (*curr_len <= new_len) {
113 *curr_len = new_len + (*curr_len / 2);
114 *dst = realloc(*dst, *curr_len);
115 if (!*dst)
116 err("could not realloc() %li bytes", (unsigned long)*curr_len);
117 }
118
119 if (n)
120 strncat(*dst, src, n);
121 else
122 strcat(*dst, src);
123}
124static inline void xchrcat(char **dst, const char append, size_t *curr_len)
125{
126 static char my_app[2];
127 my_app[0] = append;
128 my_app[1] = '\0';
129 xstrcat(dst, my_app, curr_len);
130}
131
132/* Match filename against entries in matchlist, return TRUE
133 * if the file is listed */
134static int file_matches_list(const char *filename, char **matchlist) {
135 char **file;
136 char *match;
137 char buf[__PAX_UTILS_PATH_MAX];
138
139 if (matchlist == NULL)
140 return 0;
141
142 for (file = matchlist; *file != NULL; file++) {
143 if (search_path) {
144 snprintf(buf,__PAX_UTILS_PATH_MAX, "%s%s", search_path, *file);
145 match=buf;
146 } else {
147 match=*file;
148 }
149 if (fnmatch(match, filename, 0) == 0)
150 return 1; /* TRUE */
151 }
152 return 0; /* FALSE */
153} 118}
154 119
155/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
156static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
157{ 122{
158 /* 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
159#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
160 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
161 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
162 /* debug sections */ \
163 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
164 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
165 /* runtime sections */ \
166 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
167 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
168 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
169 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
170 } else { \ 138 } else \
171 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
172 } \
173 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
174 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
175 } else { \ 144 } else \
176 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
177 } \
178 } 146 }
179 GET_SYMTABS(32) 147 GET_SYMTABS(32)
180 GET_SYMTABS(64) 148 GET_SYMTABS(64)
181} 149}
182 150
212 } 180 }
213 SHOW_PAX(32) 181 SHOW_PAX(32)
214 SHOW_PAX(64) 182 SHOW_PAX(64)
215 } 183 }
216 184
217
218 if (fix_elf && setpax) { 185 if (fix_elf && setpax) {
219 /* set the chpax settings */ 186 /* set the chpax settings */
220 if (elf->elf_class == ELFCLASS32) { 187 if (elf->elf_class == ELFCLASS32) {
221 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)
222 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));
266 uint32_t flags, check_flags; \ 233 uint32_t flags, check_flags; \
267 if (elf->phdr != NULL) { \ 234 if (elf->phdr != NULL) { \
268 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 235 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
269 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \ 236 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
270 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 237 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
238 if (multi_stack++) \
271 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ 239 warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
272 if (!file_matches_list(elf->filename, qa_execstack)) {\ 240 if (file_matches_list(elf->filename, qa_execstack)) \
241 continue; \
273 found = found_phdr; \ 242 found = found_phdr; \
274 offset = 0; \ 243 offset = 0; \
275 check_flags = PF_X; \ 244 check_flags = PF_X; \
276 } else continue; \
277 } 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++) \
278 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 247 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
279 found = found_relro; \ 248 found = found_relro; \
280 offset = 4; \ 249 offset = 4; \
281 check_flags = PF_X; \ 250 check_flags = PF_X; \
282 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 251 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
283 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) \
284 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); \
285 if (!file_matches_list(elf->filename, qa_wx_load)) {\ 255 if (file_matches_list(elf->filename, qa_wx_load)) \
256 continue; \
286 found = found_load; \ 257 found = found_load; \
287 offset = 8; \ 258 offset = 8; \
288 check_flags = PF_W|PF_X; \ 259 check_flags = PF_W|PF_X; \
289 } else continue; \
290 } else \ 260 } else \
291 continue; \ 261 continue; \
292 flags = EGET(phdr[i].p_flags); \ 262 flags = EGET(phdr[i].p_flags); \
293 if (be_quiet && ((flags & check_flags) != check_flags)) \ 263 if (be_quiet && ((flags & check_flags) != check_flags)) \
294 continue; \ 264 continue; \
304 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
305 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
306 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
307 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
308 char *str; \ 278 char *str; \
309 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
310 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
311 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
312 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
313 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
314 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
328 break; \ 298 break; \
329 } \ 299 } \
330 } \ 300 } \
331 skip_this_shdr##B: \ 301 skip_this_shdr##B: \
332 if (!multi_stack) { \ 302 if (!multi_stack) { \
303 if (file_matches_list(elf->filename, qa_execstack)) \
304 return NULL; \
333 *found_phdr = 1; \ 305 *found_phdr = 1; \
334 shown = 1; \ 306 shown = 1; \
335 memcpy(ret, "!WX", 3); \ 307 memcpy(ret, "!WX", 3); \
336 } \ 308 } \
337 } \ 309 } \
343 return NULL; 315 return NULL;
344 else 316 else
345 return ret; 317 return ret;
346} 318}
347 319
320/*
321 * See if this ELF contains a DT_TEXTREL tag in any of its
322 * PT_DYNAMIC sections.
323 */
348static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 324static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
349{ 325{
350 static const char *ret = "TEXTREL"; 326 static const char *ret = "TEXTREL";
351 unsigned long i; 327 unsigned long i;
352 328
360 Elf ## B ## _Dyn *dyn; \ 336 Elf ## B ## _Dyn *dyn; \
361 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 337 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
362 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 338 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
363 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
364 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
365 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; \
366 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
367 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
368 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
369 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
370 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)*/ \
371 *found_textrel = 1; \ 347 *found_textrel = 1; \
372 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
373 return (be_wewy_wewy_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
382 if (be_quiet || be_wewy_wewy_quiet) 358 if (be_quiet || be_wewy_wewy_quiet)
383 return NULL; 359 return NULL;
384 else 360 else
385 return " - "; 361 return " - ";
386} 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 */
387static 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)
388{ 370{
389 unsigned long s, r, rmax; 371 unsigned long s, r, rmax;
390 void *symtab_void, *strtab_void, *text_void; 372 void *symtab_void, *strtab_void, *text_void;
391 373
412 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
413 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
414 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
415 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
416 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
417 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
418 rela = NULL; \ 400 rela = NULL; \
419 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
420 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
421 rel = NULL; \ 403 rel = NULL; \
422 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
423 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
424 } else \ 406 } else \
425 continue; \ 407 continue; \
426 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
427 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
442 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
443 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
444 } else \ 426 } else \
445 *found_textrels = 1; \ 427 *found_textrels = 1; \
446 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
447 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
448 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
449 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
450 continue; \ 432 continue; \
451 } \ 433 } \
452 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
453 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
456 sym = NULL; \ 438 sym = NULL; \
457 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
458 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
459 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
460 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
461 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)); \
462 else \ 444 else \
463 printf("(memory/fake?)"); \ 445 printf("(memory/data?)"); \
464 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
465 /* 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 */ \
466 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
467 func = NULL; \ 449 func = NULL; \
468 offset_tmp = 0; \ 450 offset_tmp = 0; \
469 while (sym_max--) { \ 451 while (sym_max--) { \
470 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) { \
471 func = sym; \ 453 func = sym; \
472 offset_tmp = EGET(sym->st_value); \ 454 offset_tmp = EGET(sym->st_value); \
473 } \ 455 } \
474 ++sym; \ 456 ++sym; \
475 } \ 457 } \
476 printf(" in "); \ 458 printf(" in "); \
477 if (func && func->st_name) \ 459 if (func && func->st_name) { \
478 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); \
479 else \ 463 else \
480 printf("(NULL: fake?)"); \ 464 printf("%s", func_name); \
465 } else \
466 printf("(optimized out)"); \
481 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 } \
482 } \ 489 } \
483 } } 490 } }
484 SHOW_TEXTRELS(32) 491 SHOW_TEXTRELS(32)
485 SHOW_TEXTRELS(64) 492 SHOW_TEXTRELS(64)
486 } 493 }
488 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);
489 496
490 return NULL; 497 return NULL;
491} 498}
492 499
493static void rpath_security_checks(elfobj *, char *, const char *);
494static 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)
495{ 501{
496 struct stat st; 502 struct stat st;
497 switch (*item) { 503 switch (*item) {
498 case '/': break; 504 case '/': break;
504 warnf("Security problem NULL %s in %s", dt_type, elf->filename); 510 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
505 break; 511 break;
506 case '$': 512 case '$':
507 if (fstat(elf->fd, &st) != -1) 513 if (fstat(elf->fd, &st) != -1)
508 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 514 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
509 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",
510 dt_type, item, elf->filename, st.st_mode & 07777); 516 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
511 break; 517 break;
512 default: 518 default:
513 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);
514 break; 520 break;
515 } 521 }
516} 522}
517static 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)
518{ 524{
519 unsigned long i, s; 525 unsigned long i;
520 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
521 void *strtbl_void; 527 void *strtbl_void;
522 528
523 if (!show_rpath) return; 529 if (!show_rpath) return;
524 530
535 Elf ## B ## _Off offset; \ 541 Elf ## B ## _Off offset; \
536 Elf ## B ## _Xword word; \ 542 Elf ## B ## _Xword word; \
537 /* Scan all the program headers */ \ 543 /* Scan all the program headers */ \
538 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 544 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
539 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
540 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; \
541 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
542 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
543 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
544 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
545 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
546 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
547 r = &rpath; \ 553 r = &rpath; \
548 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
549 r = &runpath; \ 555 r = &runpath; \
553 } \ 559 } \
554 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
555 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
556 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
557 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
558 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
559 /* 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 */ \
560 if (fix_elf) \ 566 if (fix_elf) \
561 offset = strlen(*r); \ 567 offset = strlen(*r); \
562 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
563 if (be_quiet) { \ 569 if (be_quiet) { \
569 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
570 while (start) { \ 576 while (start) { \
571 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
572 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
573 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
574 if (use_ldcache) \ 580 if (use_ldcache) { \
575 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
576 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
577 *r = end; \ 585 *r = end; \
578 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
579 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
580 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
581 (*r)++; \ 589 (*r)++; \
582 break; \ 590 break; \
583 } \ 591 } \
592 } \
584 if (!*r || !end) \ 593 if (!*r || !end) \
585 break; \ 594 break; \
586 else \ 595 else \
587 start = start + len + 1; \ 596 start = start + len + 1; \
588 } \ 597 } \
673#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
674#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
675#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
676#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
677 686
678static char *lookup_cache_lib(elfobj *, char *);
679
680#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
681 688
682static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
683{ 690{
684 int fd = 0; 691 int fd;
685 char *strs; 692 char *strs;
686 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
687 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
688 struct stat st; 695 struct stat st;
689 696
690 typedef struct { 697 typedef struct {
691 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
692 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
702 libentry_t *libent; 709 libentry_t *libent;
703 710
704 if (fname == NULL) 711 if (fname == NULL)
705 return NULL; 712 return NULL;
706 713
707 if (ldcache == 0) { 714 if (ldcache == NULL) {
708 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)
709 return NULL; 720 return NULL;
710 721
711 /* 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 */
712 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
713 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
714
715 close(fd); 725 close(fd);
716 726
717 if (ldcache == (caddr_t)-1) { 727 if (ldcache == MAP_FAILED) {
718 ldcache = 0; 728 ldcache = NULL;
719 return NULL; 729 return NULL;
720 } 730 }
721 731
722 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;
723 return NULL; 737 return NULL;
724 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
725 return NULL;
726 } 738 }
739 } else
740 header = ldcache;
727 741
728 header = (header_t *) ldcache;
729 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
730 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
731 744
732 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
733 /* 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
734 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
735 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
736 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
737 continue; 751 continue;
738 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
739 continue; 753 continue;
740 754
741 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
742 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
743 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
744 } 761 }
762
745 return buf; 763 return buf;
746} 764}
747 765
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}
748#else 792#else
793#ifdef __ELF__
749#warning Cache support not implemented for your target 794#warning Cache support not implemented for your target
795#endif
750static char *lookup_cache_lib(elfobj *elf, char *fname) 796static char *lookup_cache_lib(elfobj *elf, char *fname)
751{ 797{
752 return NULL; 798 return NULL;
753} 799}
754#endif 800#endif
758 unsigned long i; 804 unsigned long i;
759 char *needed; 805 char *needed;
760 void *strtbl_void; 806 void *strtbl_void;
761 char *p; 807 char *p;
762 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
763 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
764 815
765 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
766 817
767 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
768#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
770 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
771 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
772 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
773 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
774 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 */ \
775 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
776 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; \
777 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
778 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 */ \
779 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
780 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
781 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
782 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
783 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
784 ++dyn; \ 840 ++dyn; \
785 continue; \ 841 continue; \
786 } \ 842 } \
787 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
788 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
789 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
790 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
791 if (use_ldcache) \ 848 if (use_ldcache) \
792 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
793 needed = p; \ 850 needed = p; \
794 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
795 } \ 852 } \
796 *found_needed = 1; \ 853 *found_needed = 1; \
797 } else { \ 854 } else { \
798 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)) { \
799 *found_lib = 1; \ 864 *found_lib = 1; \
800 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
801 } \ 866 } \
802 } \ 867 } \
803 } \ 868 } \
804 ++dyn; \ 869 ++dyn; \
805 } \ 870 } \
846 Elf ## B ## _Dyn *dyn; \ 911 Elf ## B ## _Dyn *dyn; \
847 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 912 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
848 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 913 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
849 Elf ## B ## _Off offset; \ 914 Elf ## B ## _Off offset; \
850 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
851 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; \
852 dynamic = 1; \ 917 dynamic = 1; \
853 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
854 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
855 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
856 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
857 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
858 (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)) \
859 { \ 924 { \
860 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
868 SHOW_BIND(32) 933 SHOW_BIND(32)
869 SHOW_BIND(64) 934 SHOW_BIND(64)
870 935
871 if (be_wewy_wewy_quiet) return NULL; 936 if (be_wewy_wewy_quiet) return NULL;
872 937
938 /* don't output anything if quiet mode and the ELF is static or not setuid */
873 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))))) {
874 return NULL; 940 return NULL;
875 } else { 941 } else {
876 *found_bind = 1; 942 *found_bind = 1;
877 return (char *) (dynamic ? "LAZY" : "STATIC"); 943 return (char *)(dynamic ? "LAZY" : "STATIC");
878 } 944 }
879} 945}
880static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
881{ 947{
882 unsigned long i; 948 unsigned long i;
894 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 960 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
895 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 961 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
896 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 962 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
897 Elf ## B ## _Off offset; \ 963 Elf ## B ## _Off offset; \
898 /* only look for soname in shared objects */ \ 964 /* only look for soname in shared objects */ \
899 if (ehdr->e_type != ET_DYN) \ 965 if (EGET(ehdr->e_type) != ET_DYN) \
900 return NULL; \ 966 return NULL; \
901 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
902 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; \
903 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
904 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
905 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
906 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
907 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
908 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
909 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
910 ++dyn; \ 976 ++dyn; \
911 continue; \ 977 continue; \
912 } \ 978 } \
913 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
914 *found_soname = 1; \ 980 *found_soname = 1; \
915 return (be_wewy_wewy_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
916 } \ 982 } \
917 ++dyn; \ 983 ++dyn; \
918 } \ 984 } \
921 SHOW_SONAME(64) 987 SHOW_SONAME(64)
922 } 988 }
923 989
924 return NULL; 990 return NULL;
925} 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
926static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
927{ 1161{
928 unsigned long i; 1162 unsigned long i;
929 char *ret; 1163 char *ret;
930 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
931 1165
932 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
933 ret = find_sym; 1167 ret = NULL;
934 1168
935 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
936 1170
937 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
938#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
939 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
940 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
941 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
942 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)); \
943 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
944 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
945 if (cnt) \ 1180 if (cnt) \
946 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
947 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 } \
948 if (sym->st_name) { \ 1187 if (sym->st_name) { \
949 /* make sure the symbol name is in acceptable memory range */ \ 1188 /* make sure the symbol name is in acceptable memory range */ \
950 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
951 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
952 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
953 ++sym; \ 1192 ++sym; \
954 continue; \ 1193 continue; \
955 } \ 1194 } \
956 /* debug display ... show all symbols and some extra info */ \ 1195 scanelf_match_symname(elf, found_sym, \
957 if (*ret == '*') { \ 1196 &ret, &ret_len, symname, \
958 printf("%s(%s) %5lX %15s %s\n", \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
959 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
960 elf->base_filename, \ 1199 EGET(sym->st_shndx), \
961 (unsigned long)sym->st_size, \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
962 get_elfstttype(sym->st_info), \ 1201 EGET(sym->st_size)); \
963 symname); \
964 *found_sym = 1; \
965 } else { \
966 /* allow the user to specify a comma delimited list of symbols to search for */ \
967 char *this_sym, *next_sym; \
968 this_sym = ret; \
969 do { \
970 next_sym = strchr(this_sym, ','); \
971 if (next_sym == NULL) \
972 next_sym = this_sym + strlen(this_sym); \
973 /* do we want a defined symbol ? */ \
974 if (*this_sym == '+') { \
975 if (sym->st_shndx == SHN_UNDEF) \
976 goto skip_this_sym##B; \
977 ++this_sym; \
978 /* do we want an undefined symbol ? */ \
979 } else if (*this_sym == '-') { \
980 if (sym->st_shndx != SHN_UNDEF) \
981 goto skip_this_sym##B; \
982 ++this_sym; \
983 } \
984 /* ok, lets compare the name now */ \
985 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
986 (strncmp(symname, versioned_symname, strlen(versioned_symname)) == 0)) { \
987 if (be_semi_verbose) { \
988 char buf[126]; \
989 snprintf(buf, sizeof(buf), "%lX %s %s", \
990 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
991 ret = buf; \
992 } else \
993 ret = this_sym; \
994 (*found_sym)++; \
995 goto break_out; \
996 } \
997 skip_this_sym##B: this_sym = next_sym + 1; \
998 } while (*next_sym != '\0'); \
999 } \
1000 } \ 1202 } \
1001 ++sym; \ 1203 ++sym; \
1002 } } 1204 } }
1003 FIND_SYM(32) 1205 FIND_SYM(32)
1004 FIND_SYM(64) 1206 FIND_SYM(64)
1010 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
1011 return ret; 1213 return ret;
1012 if (be_quiet) 1214 if (be_quiet)
1013 return NULL; 1215 return NULL;
1014 else 1216 else
1015 return (char *)" - "; 1217 return " - ";
1016} 1218}
1017 1219
1018
1019static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1020{ 1221{
1021 if (!find_section) 1222 if (!find_section)
1022 return NULL; 1223 return NULL;
1023 1224
1024#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
1025 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1026 int invert; \ 1228 int invert; \
1229 const char *section_name; \
1027 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1028 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
1029 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1030 if ((section == NULL && invert) || (section != NULL && !invert)) \ 1236 if ((section == NULL && invert) || (section != NULL && !invert)) \
1237 ++matched; \
1238 } \
1239 \
1240 if (matched == array_cnt(find_section_arr)) \
1031 *found_section = 1; \ 1241 *found_section = 1; \
1032 } 1242 }
1033 FIND_SECTION(32) 1243 FIND_SECTION(32)
1034 FIND_SECTION(64) 1244 FIND_SECTION(64)
1035 1245
1040 return find_section; 1250 return find_section;
1041 1251
1042 if (be_quiet) 1252 if (be_quiet)
1043 return NULL; 1253 return NULL;
1044 else 1254 else
1045 return (char *)" - "; 1255 return " - ";
1046} 1256}
1047 1257
1048/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1049#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1050static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1051{ 1261{
1052 unsigned long i; 1262 unsigned long i;
1053 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1054 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
1055 found_sym, found_lib, found_file, found_textrels, found_section; 1265 found_sym, found_lib, found_file, found_textrels, found_section;
1056 static char *out_buffer = NULL; 1266 static char *out_buffer = NULL;
1057 static size_t out_len; 1267 static size_t out_len;
1058 1268
1059 found_pax = found_phdr = found_relro = found_load = found_textrel = \ 1269 found_pax = found_phdr = found_relro = found_load = found_textrel = \
1068 printf("%s: scanning file\n", elf->filename); 1278 printf("%s: scanning file\n", elf->filename);
1069 1279
1070 /* init output buffer */ 1280 /* init output buffer */
1071 if (!out_buffer) { 1281 if (!out_buffer) {
1072 out_len = sizeof(char) * 80; 1282 out_len = sizeof(char) * 80;
1073 out_buffer = (char*)xmalloc(out_len); 1283 out_buffer = xmalloc(out_len);
1074 } 1284 }
1075 *out_buffer = '\0'; 1285 *out_buffer = '\0';
1076 1286
1077 /* show the header */ 1287 /* show the header */
1078 if (!be_quiet && show_banner) { 1288 if (!be_quiet && show_banner) {
1089 case 'o': prints(" TYPE "); break; 1299 case 'o': prints(" TYPE "); break;
1090 case 'x': prints(" PAX "); break; 1300 case 'x': prints(" PAX "); break;
1091 case 'e': prints("STK/REL/PTL "); break; 1301 case 'e': prints("STK/REL/PTL "); break;
1092 case 't': prints("TEXTREL "); break; 1302 case 't': prints("TEXTREL "); break;
1093 case 'r': prints("RPATH "); break; 1303 case 'r': prints("RPATH "); break;
1304 case 'M': prints("CLASS "); break;
1094 case 'n': prints("NEEDED "); break; 1305 case 'n': prints("NEEDED "); break;
1095 case 'i': prints("INTERP "); break; 1306 case 'i': prints("INTERP "); break;
1096 case 'b': prints("BIND "); break; 1307 case 'b': prints("BIND "); break;
1308 case 'Z': prints("SIZE "); break;
1097 case 'S': prints("SONAME "); break; 1309 case 'S': prints("SONAME "); break;
1098 case 's': prints("SYM "); break; 1310 case 's': prints("SYM "); break;
1099 case 'N': prints("LIB "); break; 1311 case 'N': prints("LIB "); break;
1100 case 'T': prints("TEXTRELS "); break; 1312 case 'T': prints("TEXTRELS "); break;
1101 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;
1102 default: warnf("'%c' has no title ?", out_format[i]); 1319 default: warnf("'%c' has no title ?", out_format[i]);
1103 } 1320 }
1104 } 1321 }
1105 if (!found_file) prints("FILE "); 1322 if (!found_file) prints("FILE ");
1106 prints("\n"); 1323 prints("\n");
1110 1327
1111 /* dump all the good stuff */ 1328 /* dump all the good stuff */
1112 for (i = 0; out_format[i]; ++i) { 1329 for (i = 0; out_format[i]; ++i) {
1113 const char *out; 1330 const char *out;
1114 const char *tmp; 1331 const char *tmp;
1115 1332 static char ubuf[sizeof(unsigned long)*2];
1116 if (!IS_MODIFIER(out_format[i])) { 1333 if (!IS_MODIFIER(out_format[i])) {
1117 xchrcat(&out_buffer, out_format[i], &out_len); 1334 xchrcat(&out_buffer, out_format[i], &out_len);
1118 continue; 1335 continue;
1119 } 1336 }
1120 1337
1156 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1373 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1157 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;
1158 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1159 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;
1160 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;
1161 case 'n': 1381 case 'n':
1162 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;
1163 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1164 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1165 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1166 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1386 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1167 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;;
1168 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1169 } 1393 }
1170 if (out) { 1394 if (out)
1171 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1172 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1173 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1174 else
1175 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1176 }
1177 } 1396 }
1178 1397
1179#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1180 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1181 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1213 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1214 goto label_done; 1433 goto label_done;
1215 break; 1434 break;
1216 default: break; 1435 default: break;
1217 } 1436 }
1218 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1219 char sbuf[126]; 1438 char sbuf[126];
1220 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1221 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1222 char *p; 1441 char *p;
1223 while((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1224 *p = 0; 1443 *p = 0;
1225 if (etype_lookup(p+1) == get_etype(elf)) 1444 if (etype_lookup(p+1) == get_etype(elf))
1226 goto label_ret; 1445 goto label_ret;
1227 } 1446 }
1228 } 1447 }
1248 1467
1249 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1250 if (ar == NULL) 1469 if (ar == NULL)
1251 return 1; 1470 return 1;
1252 1471
1253 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);
1254 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");
1255 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);
1256 if (elf) { 1478 if (elf) {
1257 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1258 unreadelf(elf); 1480 unreadelf(elf);
1259 } 1481 }
1260 } 1482 }
1261 munmap(ar_buffer, len); 1483 munmap(ar_buffer, len);
1262 1484
1263 return 0; 1485 return 0;
1264} 1486}
1265/* 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 */
1266static void scanelf_file(const char *filename) 1488static int scanelf_file(const char *filename, const struct stat *st_cache)
1267{ 1489{
1490 const struct stat *st = st_cache;
1268 struct stat st; 1491 struct stat symlink_st;
1269 int fd; 1492 int fd;
1270 1493
1271 /* make sure 'filename' exists */
1272 if (lstat(filename, &st) == -1) {
1273 if (be_verbose > 2) printf("%s: does not exist\n", filename);
1274 return;
1275 }
1276
1277 /* always handle regular files and handle symlinked files if no -y */ 1494 /* always handle regular files and handle symlinked files if no -y */
1278 if (S_ISLNK(st.st_mode)) { 1495 if (S_ISLNK(st->st_mode)) {
1279 if (!scan_symlink) return; 1496 if (!scan_symlink) return 1;
1280 stat(filename, &st); 1497 stat(filename, &symlink_st);
1498 st = &symlink_st;
1281 } 1499 }
1500
1282 if (!S_ISREG(st.st_mode)) { 1501 if (!S_ISREG(st->st_mode)) {
1283 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1502 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1284 return; 1503 return 1;
1285 } 1504 }
1286 1505
1506 if (match_perms) {
1507 if ((st->st_mode | match_perms) != st->st_mode)
1508 return 1;
1509 }
1287 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1510 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1288 return; 1511 return 1;
1289 1512
1290 if (scanelf_elf(filename, fd, st.st_size) == 1 && scan_archives) 1513 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1291 /* 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 */
1292 scanelf_archive(filename, fd, st.st_size); 1515 scanelf_archive(filename, fd, st->st_size);
1293 1516
1294 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;
1295} 1529}
1296 1530
1297/* 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 */
1298static void scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1299{ 1533{
1300 register DIR *dir; 1534 register DIR *dir;
1301 register struct dirent *dentry; 1535 register struct dirent *dentry;
1302 struct stat st_top, st; 1536 struct stat st_top, st;
1303 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1304 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);
1305 1543
1306 /* make sure path exists */ 1544 /* make sure path exists */
1307 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1308 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1309 return; 1547 return 1;
1310 } 1548 }
1311 1549
1312 /* 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 */
1313 if (!S_ISDIR(st_top.st_mode)) { 1551 if (!S_ISDIR(st_top.st_mode)) {
1314 scanelf_file(path); 1552 return scanelf_file(path, &st_top);
1315 return;
1316 } 1553 }
1317 1554
1318 /* now scan the dir looking for fun stuff */ 1555 /* now scan the dir looking for fun stuff */
1319 if ((dir = opendir(path)) == NULL) { 1556 if ((dir = opendir(path)) == NULL) {
1320 warnf("could not opendir %s: %s", path, strerror(errno)); 1557 warnf("could not opendir %s: %s", path, strerror(errno));
1321 return; 1558 return 1;
1322 } 1559 }
1323 if (be_verbose > 1) printf("%s: scanning dir\n", path); 1560 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1324 1561
1325 pathlen = strlen(path); 1562 pathlen = strlen(path);
1326 while ((dentry = readdir(dir))) { 1563 while ((dentry = readdir(dir))) {
1333 continue; 1570 continue;
1334 } 1571 }
1335 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name); 1572 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
1336 if (lstat(buf, &st) != -1) { 1573 if (lstat(buf, &st) != -1) {
1337 if (S_ISREG(st.st_mode)) 1574 if (S_ISREG(st.st_mode))
1338 scanelf_file(buf); 1575 ret = scanelf_file(buf, &st);
1339 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1576 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1340 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1577 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1341 scanelf_dir(buf); 1578 ret = scanelf_dir(buf);
1342 } 1579 }
1343 } 1580 }
1344 } 1581 }
1345 closedir(dir); 1582 closedir(dir);
1583 return ret;
1346} 1584}
1347 1585
1348static int scanelf_from_file(const char *filename) 1586static int scanelf_from_file(const char *filename)
1349{ 1587{
1350 FILE *fp = NULL; 1588 FILE *fp = NULL;
1351 char *p; 1589 char *p;
1352 char path[__PAX_UTILS_PATH_MAX]; 1590 char path[__PAX_UTILS_PATH_MAX];
1591 int ret = 0;
1353 1592
1354 if (strcmp(filename, "-") == 0) 1593 if (strcmp(filename, "-") == 0)
1355 fp = stdin; 1594 fp = stdin;
1356 else if ((fp = fopen(filename, "r")) == NULL) 1595 else if ((fp = fopen(filename, "r")) == NULL)
1357 return 1; 1596 return 1;
1358 1597
1359 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1598 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1360 if ((p = strchr(path, '\n')) != NULL) 1599 if ((p = strchr(path, '\n')) != NULL)
1361 *p = 0; 1600 *p = 0;
1362 search_path = path; 1601 search_path = path;
1363 scanelf_dir(path); 1602 ret = scanelf_dir(path);
1364 } 1603 }
1365 if (fp != stdin) 1604 if (fp != stdin)
1366 fclose(fp); 1605 fclose(fp);
1367 return 0; 1606 return ret;
1368} 1607}
1369 1608
1370#if defined(__GLIBC__) || defined(__UCLIBC__) 1609#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1371 1610
1372static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1373{ 1612{
1374 FILE *fp = NULL; 1613 FILE *fp = NULL;
1375 char *p; 1614 char *p;
1376 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1377 1617
1378 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1379 return i;
1380 1619
1381 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1382 return i; 1621 return i;
1383 1622
1384 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1385 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1386 *p = 0; 1625 *p = 0;
1387 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1388 *p = 0; 1627 *p = 0;
1628
1389 // recursive includes of the same file will make this segfault. 1629 /* recursive includes of the same file will make this segfault. */
1390 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1391 glob64_t gl; 1631 glob_t gl;
1392 size_t x; 1632 size_t x;
1393 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1394 1634
1395 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1396 1638
1397 if (path[8] != '/') 1639 if (path[8] != '/')
1398 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1399 else 1641 else
1400 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1401 1643
1402 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1403 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1404 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1405 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1406 continue; 1648 continue;
1407 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1408 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1409 globfree64(&gl);
1410 return i;
1411 }
1412 } 1650 }
1413 globfree64 (&gl); 1651 globfree(&gl);
1414 continue; 1652 continue;
1415 } else
1416 abort();
1417 } 1653 }
1654 }
1655
1418 if (*path != '/') 1656 if (*path != '/')
1419 continue; 1657 continue;
1420 1658
1421 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1422
1423 if (i + 1 == ARRAY_SIZE(ldpaths))
1424 break;
1425 } 1660 }
1426 ldpaths[i] = NULL;
1427 1661
1428 fclose(fp); 1662 fclose(fp);
1429 return i; 1663 return i;
1430} 1664}
1431 1665
1432#elif defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1433 1667
1434static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1435{ 1669{
1436 FILE *fp = NULL; 1670 FILE *fp = NULL;
1437 char *b = NULL, *p; 1671 char *b = NULL, *p;
1438 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1439 1673 char _fname[__PAX_UTILS_PATH_MAX];
1440 if (i + 1 == ARRAY_SIZE(ldpaths)) 1674
1441 return i; 1675 fname = maybe_add_root(fname, _fname);
1442 1676
1443 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1444 return i; 1678 return i;
1445 1679
1446 if ( fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1447 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 || 1681 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1448 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1 1682 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1449 ) { 1683 {
1450 fclose(fp); 1684 fclose(fp);
1451 return i; 1685 return i;
1452 } 1686 }
1453 1687
1454 b = (char*)malloc(hdr.dirlistlen+1); 1688 b = xmalloc(hdr.dirlistlen + 1);
1455 if ( fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1 ) { 1689 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1456 fclose(fp); 1690 fclose(fp);
1457 free(b); 1691 free(b);
1458 return i; 1692 return i;
1459 } 1693 }
1460 1694
1461 while ( (p = strsep(&b, ":")) ) { 1695 while ((p = strsep(&b, ":"))) {
1462 if ( *p == '\0' ) continue; 1696 if (*p == '\0')
1463 ldpaths[i++] = xstrdup(p); 1697 continue;
1464 1698 xarraypush(ldpaths, p, strlen(p));
1465 if (i + 1 == ARRAY_SIZE(ldpaths))
1466 break;
1467 } 1699 }
1468 ldpaths[i] = NULL; 1700
1469
1470 free(b); 1701 free(b);
1471 fclose(fp); 1702 fclose(fp);
1472 return i; 1703 return i;
1473} 1704}
1474 1705
1475#else 1706#else
1476 1707#ifdef __ELF__
1477#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1709#endif
1478static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1479{ 1711{
1480 memset(ldpaths, 0x00, sizeof(ldpaths)); 1712 return 0;
1481} 1713}
1482
1483#endif 1714#endif
1484 1715
1485/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1486static void scanelf_ldpath() 1717static void scanelf_ldpath(void)
1487{ 1718{
1488 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1489 int i = 0; 1722 int i = 0;
1490 1723
1491 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1492 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1493 1726
1494 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1495 1728
1496 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1497 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1498 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1499 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1500 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1501 ++i; 1734 ++i;
1502 } 1735 }
1503 1736
1504 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1505 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1506 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1739 if (!scan_ull) scanelf_dir("/usr/local/lib");
1507} 1740}
1508 1741
1509/* scan env PATH for paths */ 1742/* scan env PATH for paths */
1510static void scanelf_envpath() 1743static void scanelf_envpath(void)
1511{ 1744{
1512 char *path, *p; 1745 char *path, *p;
1513 1746
1514 path = getenv("PATH"); 1747 path = getenv("PATH");
1515 if (!path) 1748 if (!path)
1522 } 1755 }
1523 1756
1524 free(path); 1757 free(path);
1525} 1758}
1526 1759
1527/* usage / invocation handling functions */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1528#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"
1529#define a_argument required_argument 1762#define a_argument required_argument
1530static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1531 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1532 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1533 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1534 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1535 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1536 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1537 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1550 {"lib", a_argument, NULL, 'N'}, 1784 {"lib", a_argument, NULL, 'N'},
1551 {"gmatch", no_argument, NULL, 'g'}, 1785 {"gmatch", no_argument, NULL, 'g'},
1552 {"textrels", no_argument, NULL, 'T'}, 1786 {"textrels", no_argument, NULL, 'T'},
1553 {"etype", a_argument, NULL, 'E'}, 1787 {"etype", a_argument, NULL, 'E'},
1554 {"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'},
1555 {"all", no_argument, NULL, 'a'}, 1794 {"all", no_argument, NULL, 'a'},
1556 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1557 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1558 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1559 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1560 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1561 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1562 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1563 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1564 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1565}; 1805};
1566 1806
1567static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1568 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1569 "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)",
1570 "Scan directories recursively", 1811 "Scan directories recursively",
1571 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1572 "Don't scan symlinks", 1813 "Don't scan symlinks",
1573 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1574 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1583 "Print BIND information", 1824 "Print BIND information",
1584 "Print SONAME information", 1825 "Print SONAME information",
1585 "Find a specified symbol", 1826 "Find a specified symbol",
1586 "Find a specified section", 1827 "Find a specified section",
1587 "Find a specified library", 1828 "Find a specified library",
1588 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1589 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1590 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1591 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1592 "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",
1593 "Only output 'bad' things", 1839 "Only output 'bad' things",
1594 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1595 "Use specified format for output", 1841 "Use specified format for output",
1596 "Read input stream from a filename", 1842 "Read input stream from a filename",
1597 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1598 "Don't display the header", 1845 "Don't display the header",
1599 "Print this help and exit", 1846 "Print this help and exit",
1600 "Print version and exit", 1847 "Print version and exit",
1601 NULL 1848 NULL
1602}; 1849};
1608 printf("* Scan ELF binaries for stuff\n\n" 1855 printf("* Scan ELF binaries for stuff\n\n"
1609 "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);
1610 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1611 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1612 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1613 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",
1614 long_opts[i].name, opts_help[i]); 1864 long_opts[i].name, opts_help[i]);
1615 else 1865 else
1616 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1617 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1618 1868
1619 if (status != EXIT_SUCCESS) 1869 puts("\nFor more information, see the scanelf(1) manpage");
1620 exit(status);
1621
1622 puts("\nThe format modifiers for the -F option are:");
1623 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1624 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1625 puts(" i INTERP \tb BIND \ts symbol");
1626 puts(" N library \to Type \tT TEXTRELs");
1627 puts(" S SONAME \tk section");
1628 puts(" p filename (with search path removed)");
1629 puts(" f filename (short name/basename)");
1630 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1631
1632 puts("\nELF Etypes:");
1633 print_etypes(stdout);
1634
1635 exit(status); 1870 exit(status);
1636} 1871}
1637 1872
1638/* 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 }
1639static void parseargs(int argc, char *argv[]) 1882static int parseargs(int argc, char *argv[])
1640{ 1883{
1641 int i; 1884 int i;
1642 const char *from_file = NULL; 1885 const char *from_file = NULL;
1886 int ret = 0;
1643 1887
1644 opterr = 0; 1888 opterr = 0;
1645 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) {
1646 switch (i) { 1890 switch (i) {
1647 1891
1655 case 'f': 1899 case 'f':
1656 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");
1657 from_file = optarg; 1901 from_file = optarg;
1658 break; 1902 break;
1659 case 'E': 1903 case 'E':
1660 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1661 break; 1905 break;
1662 case 'M': 1906 case 'M':
1663 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;
1664 break; 1918 break;
1665 case 'o': { 1919 case 'o': {
1666 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1667 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1668 break; 1922 break;
1669 } 1923 }
1670 case 'k': 1924 case 'k':
1671 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1672 find_section = optarg;
1673 break; 1926 break;
1674 case 's': { 1927 case 's': {
1675 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");
1676 find_sym = optarg; 1929 find_sym = optarg;
1677 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1678 sprintf(versioned_symname, "%s@", find_sym);
1679 break; 1930 break;
1680 } 1931 }
1681 case 'N': { 1932 case 'N':
1682 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1683 find_lib = optarg;
1684 break; 1934 break;
1685 }
1686
1687 case 'F': { 1935 case 'F': {
1688 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");
1689 out_format = optarg; 1937 out_format = optarg;
1690 break; 1938 break;
1691 } 1939 }
1692 case 'z': { 1940 case 'z': {
1693 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1941 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1694 size_t x; 1942 size_t x;
1695 1943
1696 for (x = 0 ; x < strlen(optarg); x++) { 1944 for (x = 0; x < strlen(optarg); x++) {
1697 switch(optarg[x]) { 1945 switch (optarg[x]) {
1698 case 'p': 1946 case 'p':
1699 case 'P': 1947 case 'P':
1700 do_state(optarg[x], PAGEEXEC); 1948 do_pax_state(optarg[x], PAGEEXEC);
1701 break; 1949 break;
1702 case 's': 1950 case 's':
1703 case 'S': 1951 case 'S':
1704 do_state(optarg[x], SEGMEXEC); 1952 do_pax_state(optarg[x], SEGMEXEC);
1705 break; 1953 break;
1706 case 'm': 1954 case 'm':
1707 case 'M': 1955 case 'M':
1708 do_state(optarg[x], MPROTECT); 1956 do_pax_state(optarg[x], MPROTECT);
1709 break; 1957 break;
1710 case 'e': 1958 case 'e':
1711 case 'E': 1959 case 'E':
1712 do_state(optarg[x], EMUTRAMP); 1960 do_pax_state(optarg[x], EMUTRAMP);
1713 break; 1961 break;
1714 case 'r': 1962 case 'r':
1715 case 'R': 1963 case 'R':
1716 do_state(optarg[x], RANDMMAP); 1964 do_pax_state(optarg[x], RANDMMAP);
1717 break; 1965 break;
1718 case 'x': 1966 case 'x':
1719 case 'X': 1967 case 'X':
1720 do_state(optarg[x], RANDEXEC); 1968 do_pax_state(optarg[x], RANDEXEC);
1721 break; 1969 break;
1722 default: 1970 default:
1723 break; 1971 break;
1724 } 1972 }
1725 } 1973 }
1730 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1978 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1731 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1979 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1732 setpax = flags; 1980 setpax = flags;
1733 break; 1981 break;
1734 } 1982 }
1983 case 'Z': show_size = 1; break;
1735 case 'g': gmatch = 1; break; 1984 case 'g': g_match = 1; break;
1736 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1737 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1738 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1739 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1740 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1741 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1742 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1743 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1751 case 'b': show_bind = 1; break; 2001 case 'b': show_bind = 1; break;
1752 case 'S': show_soname = 1; break; 2002 case 'S': show_soname = 1; break;
1753 case 'T': show_textrels = 1; break; 2003 case 'T': show_textrels = 1; break;
1754 case 'q': be_quiet = 1; break; 2004 case 'q': be_quiet = 1; break;
1755 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1756 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;
1757 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;
1758 case ':': 2013 case ':':
1759 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1760 case '?': 2015 case '?':
1761 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1762 default: 2017 default:
1763 err("Unhandled option '%c'; please report this", i); 2018 err("Unhandled option '%c'; please report this", i);
1764 } 2019 }
1765 } 2020 }
1766 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);
1767 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1768 if (out_format) { 2031 if (out_format) {
1769 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1770 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1771 show_textrels = 0; 2034 show_textrels = show_perms = show_endian = show_size = \
2035 show_osabi = show_eabi = 0;
1772 for (i = 0; out_format[i]; ++i) { 2036 for (i = 0; out_format[i]; ++i) {
1773 if (!IS_MODIFIER(out_format[i])) continue; 2037 if (!IS_MODIFIER(out_format[i])) continue;
1774 2038
1775 switch (out_format[++i]) { 2039 switch (out_format[++i]) {
1776 case '+': break; 2040 case '+': break;
1781 case 'f': break; 2045 case 'f': break;
1782 case 'k': break; 2046 case 'k': break;
1783 case 's': break; 2047 case 's': break;
1784 case 'N': break; 2048 case 'N': break;
1785 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;
1786 case 'x': show_pax = 1; break; 2057 case 'x': show_pax = 1; break;
1787 case 'e': show_phdr = 1; break; 2058 case 'e': show_phdr = 1; break;
1788 case 't': show_textrel = 1; break; 2059 case 't': show_textrel = 1; break;
1789 case 'r': show_rpath = 1; break; 2060 case 'r': show_rpath = 1; break;
1790 case 'n': show_needed = 1; break; 2061 case 'n': show_needed = 1; break;
1791 case 'i': show_interp = 1; break; 2062 case 'i': show_interp = 1; break;
1792 case 'b': show_bind = 1; break; 2063 case 'b': show_bind = 1; break;
1793 case 'S': show_soname = 1; break; 2064 case 'S': show_soname = 1; break;
1794 case 'T': show_textrels = 1; break; 2065 case 'T': show_textrels = 1; break;
1795 default: 2066 default:
1796 err("Invalid format specifier '%c' (byte %i)", 2067 err("Invalid format specifier '%c' (byte %i)",
1797 out_format[i], i+1); 2068 out_format[i], i+1);
1798 } 2069 }
1799 } 2070 }
1800 2071
1801 /* construct our default format */ 2072 /* construct our default format */
1802 } else { 2073 } else {
1803 size_t fmt_len = 30; 2074 size_t fmt_len = 30;
1804 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2075 out_format = xmalloc(sizeof(char) * fmt_len);
2076 *out_format = '\0';
1805 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2077 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1806 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);
1807 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2084 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1808 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2085 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1809 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2086 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1810 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2087 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1811 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2088 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1822 /* now lets actually do the scanning */ 2099 /* now lets actually do the scanning */
1823 if (scan_ldpath || use_ldcache) 2100 if (scan_ldpath || use_ldcache)
1824 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG); 2101 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1825 if (scan_ldpath) scanelf_ldpath(); 2102 if (scan_ldpath) scanelf_ldpath();
1826 if (scan_envpath) scanelf_envpath(); 2103 if (scan_envpath) scanelf_envpath();
1827 if (!from_file && optind == argc && ttyname(0) == NULL) 2104 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1828 from_file = "-"; 2105 from_file = "-";
1829 if (from_file) { 2106 if (from_file) {
1830 scanelf_from_file(from_file); 2107 scanelf_from_file(from_file);
1831 from_file = *argv; 2108 from_file = *argv;
1832 } 2109 }
1833 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 2110 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1834 err("Nothing to scan !?"); 2111 err("Nothing to scan !?");
1835 while (optind < argc) { 2112 while (optind < argc) {
1836 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1837 scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1838 } 2115 }
1839 2116
1840 /* clean up */ 2117 /* clean up */
1841 if (versioned_symname) free(versioned_symname);
1842 for (i = 0; ldpaths[i]; ++i)
1843 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1844 2123
1845 if (ldcache != 0) 2124 if (ldcache != 0)
1846 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
2126 return ret;
1847} 2127}
1848 2128
1849static char **get_split_env(const char *envvar) { 2129static char **get_split_env(const char *envvar)
2130{
2131 const char *delims = " \t\n";
1850 char **envvals = NULL; 2132 char **envvals = NULL;
1851 char *saveptr = NULL;
1852 char *env; 2133 char *env, *s;
1853 char *s;
1854 int nentry; 2134 int nentry;
1855 2135
1856 if ((env = getenv(envvar)) == NULL) 2136 if ((env = getenv(envvar)) == NULL)
1857 return NULL; 2137 return NULL;
1858 2138
1859 env = xstrdup(env); 2139 env = xstrdup(env);
1860 if (env == NULL) 2140 if (env == NULL)
1861 return NULL; 2141 return NULL;
1862 2142
2143 s = strtok(env, delims);
2144 if (s == NULL) {
2145 free(env);
2146 return NULL;
2147 }
2148
1863 nentry = 0; 2149 nentry = 0;
1864 for (s = strtok_r(env, " \t\n", &saveptr); s != NULL; s = strtok_r(NULL, " \t\n", &saveptr)) { 2150 while (s != NULL) {
2151 ++nentry;
1865 if ((envvals = xrealloc(envvals, sizeof(char *)*(nentry+1))) == NULL) 2152 envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
1866 return NULL;
1867 envvals[nentry++] = s; 2153 envvals[nentry-1] = s;
2154 s = strtok(NULL, delims);
1868 } 2155 }
1869 envvals[nentry] = NULL; 2156 envvals[nentry] = NULL;
1870 2157
2158 /* don't want to free(env) as it contains the memory that backs
2159 * the envvals array of strings */
1871 return envvals; 2160 return envvals;
1872} 2161}
1873 2162
1874static void parseenv() { 2163static void parseenv(void)
2164{
2165 color_init(false);
1875 qa_textrels=get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
1876 qa_execstack=get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
1877 qa_wx_load=get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
1878} 2169}
1879 2170
1880 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
1881 2180
1882int main(int argc, char *argv[]) 2181int main(int argc, char *argv[])
1883{ 2182{
2183 int ret;
1884 if (argc < 2) 2184 if (argc < 2)
1885 usage(EXIT_FAILURE); 2185 usage(EXIT_FAILURE);
1886 parseenv(); 2186 parseenv();
1887 parseargs(argc, argv); 2187 ret = parseargs(argc, argv);
1888 fclose(stdout); 2188 fclose(stdout);
1889#ifdef __BOUNDS_CHECKING_ON 2189#ifdef __PAX_UTILS_CLEANUP
1890 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");
1891#endif 2194#endif
1892 return EXIT_SUCCESS; 2195 return ret;
1893} 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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