/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.143 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 1.143 2006/05/11 05:44:22 solar Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $
5 * 5 *
6 * Copyright 2003-2006 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2006 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10static const char *rcsid = "$Id: scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $";
11const char argv0[] = "scanelf";
12
10#include "paxinc.h" 13#include "paxinc.h"
11#if defined(__GLIBC__) || defined(__UCLIBC__)
12 #include <glob.h>
13#endif
14#if defined(__FreeBSD__) || defined(__DragonFly__)
15 #include <elf-hints.h>
16#endif
17
18static const char *rcsid = "$Id: scanelf.c,v 1.143 2006/05/11 05:44:22 solar Exp $";
19#define argv0 "scanelf"
20 14
21#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
22
23#define do_state(option, flag) \
24 if (islower(option)) { \
25 flags &= ~PF_##flag; \
26 flags |= PF_NO##flag; \
27 } else { \
28 flags &= ~PF_NO##flag; \
29 flags |= PF_##flag; \
30 }
31
32 16
33/* prototypes */ 17/* prototypes */
34static int file_matches_list(const char *filename, char **matchlist); 18static int file_matches_list(const char *filename, char **matchlist);
35static int scanelf_elfobj(elfobj *elf);
36static int scanelf_elf(const char *filename, int fd, size_t len);
37static int scanelf_archive(const char *filename, int fd, size_t len);
38static void scanelf_file(const char *filename);
39static void scanelf_dir(const char *path);
40static void scanelf_ldpath(void);
41static void scanelf_envpath(void);
42static void usage(int status);
43static char **get_split_env(const char *envvar);
44static void parseenv(void);
45static void parseargs(int argc, char *argv[]);
46static char *xstrdup(const char *s);
47static void *xmalloc(size_t size);
48static void *xrealloc(void *ptr, size_t size);
49static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
50#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
51static inline void xchrcat(char **dst, const char append, size_t *curr_len);
52 19
53/* variables to control behavior */ 20/* variables to control behavior */
54static char match_etypes[126] = ""; 21static char *match_etypes = NULL;
55static char *ldpaths[256]; 22static array_t _ldpaths = array_init_decl, *ldpaths = &_ldpaths;
56static char scan_ldpath = 0; 23static char scan_ldpath = 0;
57static char scan_envpath = 0; 24static char scan_envpath = 0;
58static char scan_symlink = 1; 25static char scan_symlink = 1;
59static char scan_archives = 0; 26static char scan_archives = 0;
60static char dir_recurse = 0; 27static char dir_recurse = 0;
61static char dir_crossmount = 1; 28static char dir_crossmount = 1;
62static char show_pax = 0; 29static char show_pax = 0;
30static char show_perms = 0;
31static char show_size = 0;
63static char show_phdr = 0; 32static char show_phdr = 0;
64static char show_textrel = 0; 33static char show_textrel = 0;
65static char show_rpath = 0; 34static char show_rpath = 0;
66static char show_needed = 0; 35static char show_needed = 0;
67static char show_interp = 0; 36static char show_interp = 0;
68static char show_bind = 0; 37static char show_bind = 0;
69static char show_soname = 0; 38static char show_soname = 0;
70static char show_textrels = 0; 39static char show_textrels = 0;
71static char show_banner = 1; 40static char show_banner = 1;
41static char show_endian = 0;
42static char show_osabi = 0;
43static char show_eabi = 0;
72static char be_quiet = 0; 44static char be_quiet = 0;
73static char be_verbose = 0; 45static char be_verbose = 0;
74static char be_wewy_wewy_quiet = 0; 46static char be_wewy_wewy_quiet = 0;
75static char be_semi_verbose = 0; 47static char be_semi_verbose = 0;
76static char *find_sym = NULL, *versioned_symname = NULL; 48static char *find_sym = NULL;
77static char *find_lib = NULL; 49static char *find_lib = NULL;
50static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
78static char *find_section = NULL; 51static char *find_section = NULL;
52static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
79static char *out_format = NULL; 53static char *out_format = NULL;
80static char *search_path = NULL; 54static char *search_path = NULL;
81static char fix_elf = 0; 55static char fix_elf = 0;
82static char gmatch = 0; 56static char g_match = 0;
83static char use_ldcache = 0; 57static char use_ldcache = 0;
84 58
85static char **qa_textrels = NULL; 59static char **qa_textrels = NULL;
86static char **qa_execstack = NULL; 60static char **qa_execstack = NULL;
61static char **qa_wx_load = NULL;
62static char *root;
87 63
88int match_bits = 0; 64static int match_bits = 0;
89caddr_t ldcache = 0; 65static unsigned int match_perms = 0;
66static void *ldcache = NULL;
90size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
91unsigned long setpax = 0UL; 68static unsigned long setpax = 0UL;
92 69
93/* utility funcs */ 70static int has_objdump = 0;
71
72/* find the path to a file by name */
94static char *xstrdup(const char *s) 73static char *which(const char *fname)
95{ 74{
96 char *ret = strdup(s); 75 static char fullpath[__PAX_UTILS_PATH_MAX];
97 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
98 return ret; 117 return ret;
99}
100static void *xmalloc(size_t size)
101{
102 void *ret = malloc(size);
103 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
104 return ret;
105}
106static void *xrealloc(void *ptr, size_t size)
107{
108 void *ret = realloc(ptr, size);
109 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
110 return ret;
111}
112static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
113{
114 size_t new_len;
115
116 new_len = strlen(*dst) + strlen(src);
117 if (*curr_len <= new_len) {
118 *curr_len = new_len + (*curr_len / 2);
119 *dst = realloc(*dst, *curr_len);
120 if (!*dst)
121 err("could not realloc() %li bytes", (unsigned long)*curr_len);
122 }
123
124 if (n)
125 strncat(*dst, src, n);
126 else
127 strcat(*dst, src);
128}
129static inline void xchrcat(char **dst, const char append, size_t *curr_len)
130{
131 static char my_app[2];
132 my_app[0] = append;
133 my_app[1] = '\0';
134 xstrcat(dst, my_app, curr_len);
135}
136
137/* Match filename against entries in matchlist, return TRUE
138 * if the file is listed */
139static int file_matches_list(const char *filename, char **matchlist) {
140 char **file;
141 char *match;
142 char buf[__PAX_UTILS_PATH_MAX];
143
144 if (matchlist == NULL)
145 return 0;
146
147 for (file = matchlist; *file != NULL; file++) {
148 if (search_path) {
149 snprintf(buf,__PAX_UTILS_PATH_MAX, "%s%s", search_path, *file);
150 match=buf;
151 } else {
152 match=*file;
153 }
154 if (fnmatch(match, filename, 0) == 0)
155 return 1; /* TRUE */
156 }
157 return 0; /* FALSE */
158} 118}
159 119
160/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
161static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
162{ 122{
163 /* 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
164#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
165 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
166 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
167 /* debug sections */ \
168 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
169 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
170 /* runtime sections */ \
171 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
172 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
173 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
174 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
175 } else { \ 138 } else \
176 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
177 } \
178 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
179 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
180 } else { \ 144 } else \
181 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
182 } \
183 } 146 }
184 GET_SYMTABS(32) 147 GET_SYMTABS(32)
185 GET_SYMTABS(64) 148 GET_SYMTABS(64)
186} 149}
187 150
217 } 180 }
218 SHOW_PAX(32) 181 SHOW_PAX(32)
219 SHOW_PAX(64) 182 SHOW_PAX(64)
220 } 183 }
221 184
222
223 if (fix_elf && setpax) { 185 if (fix_elf && setpax) {
224 /* set the chpax settings */ 186 /* set the chpax settings */
225 if (elf->elf_class == ELFCLASS32) { 187 if (elf->elf_class == ELFCLASS32) {
226 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)
227 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));
271 uint32_t flags, check_flags; \ 233 uint32_t flags, check_flags; \
272 if (elf->phdr != NULL) { \ 234 if (elf->phdr != NULL) { \
273 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 235 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
274 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \ 236 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
275 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 237 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
238 if (multi_stack++) \
276 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ 239 warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
277 if (!file_matches_list(elf->filename, qa_execstack)) {\ 240 if (file_matches_list(elf->filename, qa_execstack)) \
241 continue; \
278 found = found_phdr; \ 242 found = found_phdr; \
279 offset = 0; \ 243 offset = 0; \
280 check_flags = PF_X; \ 244 check_flags = PF_X; \
281 } else continue; \
282 } 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++) \
283 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 247 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
284 found = found_relro; \ 248 found = found_relro; \
285 offset = 4; \ 249 offset = 4; \
286 check_flags = PF_X; \ 250 check_flags = PF_X; \
287 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 251 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
288 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) \
289 if (multi_load++ > max_pt_load) warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \ 254 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
255 if (file_matches_list(elf->filename, qa_wx_load)) \
256 continue; \
290 found = found_load; \ 257 found = found_load; \
291 offset = 8; \ 258 offset = 8; \
292 check_flags = PF_W|PF_X; \ 259 check_flags = PF_W|PF_X; \
293 } else \ 260 } else \
294 continue; \ 261 continue; \
307 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
308 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
309 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
310 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
311 char *str; \ 278 char *str; \
312 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
313 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
314 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
315 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
316 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
317 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
331 break; \ 298 break; \
332 } \ 299 } \
333 } \ 300 } \
334 skip_this_shdr##B: \ 301 skip_this_shdr##B: \
335 if (!multi_stack) { \ 302 if (!multi_stack) { \
303 if (file_matches_list(elf->filename, qa_execstack)) \
304 return NULL; \
336 *found_phdr = 1; \ 305 *found_phdr = 1; \
337 shown = 1; \ 306 shown = 1; \
338 memcpy(ret, "!WX", 3); \ 307 memcpy(ret, "!WX", 3); \
339 } \ 308 } \
340 } \ 309 } \
346 return NULL; 315 return NULL;
347 else 316 else
348 return ret; 317 return ret;
349} 318}
350 319
320/*
321 * See if this ELF contains a DT_TEXTREL tag in any of its
322 * PT_DYNAMIC sections.
323 */
351static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 324static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
352{ 325{
353 static const char *ret = "TEXTREL"; 326 static const char *ret = "TEXTREL";
354 unsigned long i; 327 unsigned long i;
355 328
363 Elf ## B ## _Dyn *dyn; \ 336 Elf ## B ## _Dyn *dyn; \
364 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 337 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
365 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 338 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
366 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
367 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
368 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; \
369 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
370 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
371 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
372 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
373 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)*/ \
374 *found_textrel = 1; \ 347 *found_textrel = 1; \
375 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
376 return (be_wewy_wewy_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
385 if (be_quiet || be_wewy_wewy_quiet) 358 if (be_quiet || be_wewy_wewy_quiet)
386 return NULL; 359 return NULL;
387 else 360 else
388 return " - "; 361 return " - ";
389} 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 */
390static 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)
391{ 370{
392 unsigned long s, r, rmax; 371 unsigned long s, r, rmax;
393 void *symtab_void, *strtab_void, *text_void; 372 void *symtab_void, *strtab_void, *text_void;
394 373
415 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
416 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
417 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
418 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
419 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
420 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
421 rela = NULL; \ 400 rela = NULL; \
422 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
423 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
424 rel = NULL; \ 403 rel = NULL; \
425 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
426 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
427 } else \ 406 } else \
428 continue; \ 407 continue; \
429 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
430 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
445 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
446 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
447 } else \ 426 } else \
448 *found_textrels = 1; \ 427 *found_textrels = 1; \
449 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
450 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
451 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
452 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
453 continue; \ 432 continue; \
454 } \ 433 } \
455 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
456 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
459 sym = NULL; \ 438 sym = NULL; \
460 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
461 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
462 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
463 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
464 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)); \
465 else \ 444 else \
466 printf("(memory/fake?)"); \ 445 printf("(memory/data?)"); \
467 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
468 /* 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 */ \
469 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
470 func = NULL; \ 449 func = NULL; \
471 offset_tmp = 0; \ 450 offset_tmp = 0; \
472 while (sym_max--) { \ 451 while (sym_max--) { \
473 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) { \
474 func = sym; \ 453 func = sym; \
475 offset_tmp = EGET(sym->st_value); \ 454 offset_tmp = EGET(sym->st_value); \
476 } \ 455 } \
477 ++sym; \ 456 ++sym; \
478 } \ 457 } \
479 printf(" in "); \ 458 printf(" in "); \
480 if (func && func->st_name) \ 459 if (func && func->st_name) { \
481 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); \
482 else \ 463 else \
483 printf("(NULL: fake?)"); \ 464 printf("%s", func_name); \
465 } else \
466 printf("(optimized out)"); \
484 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 } \
485 } \ 489 } \
486 } } 490 } }
487 SHOW_TEXTRELS(32) 491 SHOW_TEXTRELS(32)
488 SHOW_TEXTRELS(64) 492 SHOW_TEXTRELS(64)
489 } 493 }
491 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);
492 496
493 return NULL; 497 return NULL;
494} 498}
495 499
496static void rpath_security_checks(elfobj *, char *, const char *);
497static 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)
498{ 501{
499 struct stat st; 502 struct stat st;
500 switch (*item) { 503 switch (*item) {
501 case '/': break; 504 case '/': break;
507 warnf("Security problem NULL %s in %s", dt_type, elf->filename); 510 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
508 break; 511 break;
509 case '$': 512 case '$':
510 if (fstat(elf->fd, &st) != -1) 513 if (fstat(elf->fd, &st) != -1)
511 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 514 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
512 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",
513 dt_type, item, elf->filename, st.st_mode & 07777); 516 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
514 break; 517 break;
515 default: 518 default:
516 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);
517 break; 520 break;
518 } 521 }
519} 522}
520static 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)
521{ 524{
522 unsigned long i, s; 525 unsigned long i;
523 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
524 void *strtbl_void; 527 void *strtbl_void;
525 528
526 if (!show_rpath) return; 529 if (!show_rpath) return;
527 530
538 Elf ## B ## _Off offset; \ 541 Elf ## B ## _Off offset; \
539 Elf ## B ## _Xword word; \ 542 Elf ## B ## _Xword word; \
540 /* Scan all the program headers */ \ 543 /* Scan all the program headers */ \
541 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 544 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
542 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
543 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; \
544 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
545 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
546 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
547 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
548 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
549 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
550 r = &rpath; \ 553 r = &rpath; \
551 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
552 r = &runpath; \ 555 r = &runpath; \
556 } \ 559 } \
557 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
558 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
559 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
560 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
561 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
562 /* 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 */ \
563 if (fix_elf) \ 566 if (fix_elf) \
564 offset = strlen(*r); \ 567 offset = strlen(*r); \
565 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
566 if (be_quiet) { \ 569 if (be_quiet) { \
572 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
573 while (start) { \ 576 while (start) { \
574 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
575 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
576 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
577 if (use_ldcache) \ 580 if (use_ldcache) { \
578 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
579 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
580 *r = end; \ 585 *r = end; \
581 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
582 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
583 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
584 (*r)++; \ 589 (*r)++; \
585 break; \ 590 break; \
586 } \ 591 } \
592 } \
587 if (!*r || !end) \ 593 if (!*r || !end) \
588 break; \ 594 break; \
589 else \ 595 else \
590 start = start + len + 1; \ 596 start = start + len + 1; \
591 } \ 597 } \
676#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
677#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
678#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
679#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
680 686
681static char *lookup_cache_lib(elfobj *, char *);
682#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
688
683static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
684{ 690{
685 int fd = 0; 691 int fd;
686 char *strs; 692 char *strs;
687 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
688 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
689 struct stat st; 695 struct stat st;
690 696
691 typedef struct { 697 typedef struct {
692 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
693 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
703 libentry_t *libent; 709 libentry_t *libent;
704 710
705 if (fname == NULL) 711 if (fname == NULL)
706 return NULL; 712 return NULL;
707 713
708 if (ldcache == 0) { 714 if (ldcache == NULL) {
709 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)
710 return NULL; 720 return NULL;
711 721
712 /* 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 */
713 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
714 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
715
716 close(fd); 725 close(fd);
717 726
718 if (ldcache == (caddr_t)-1) { 727 if (ldcache == MAP_FAILED) {
719 ldcache = 0; 728 ldcache = NULL;
720 return NULL; 729 return NULL;
721 } 730 }
722 731
723 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;
724 return NULL; 737 return NULL;
725 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
726 return NULL;
727 } 738 }
739 } else
740 header = ldcache;
728 741
729 header = (header_t *) ldcache;
730 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
731 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
732 744
733 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
734 /* 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
735 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
736 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
737 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
738 continue; 751 continue;
739 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
740 continue; 753 continue;
741 754
742 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
743 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
744 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
745 } 761 }
762
746 return buf; 763 return buf;
747} 764}
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 current 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 (strcmp(symname, 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__)
1610
1371static int load_ld_so_conf(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1372{ 1612{
1373 FILE *fp = NULL; 1613 FILE *fp = NULL;
1374 char *p; 1614 char *p;
1375 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1376 1617
1377 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1378 return i;
1379 1619
1380 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1381 return i; 1621 return i;
1382 1622
1383 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1384 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1385 *p = 0; 1625 *p = 0;
1386 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1387 *p = 0; 1627 *p = 0;
1628
1388 // recursive includes of the same file will make this segfault. 1629 /* recursive includes of the same file will make this segfault. */
1389 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1390 glob64_t gl; 1631 glob_t gl;
1391 size_t x; 1632 size_t x;
1392 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1393 1634
1394 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1395 1638
1396 if (path[8] != '/') 1639 if (path[8] != '/')
1397 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1398 else 1641 else
1399 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1400 1643
1401 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1402 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1403 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1404 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1405 continue; 1648 continue;
1406 i = load_ld_so_conf(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1407 if (i + 1 >= sizeof(ldpaths) / sizeof(*ldpaths)) {
1408 globfree64(&gl);
1409 return i;
1410 }
1411 } 1650 }
1412 globfree64 (&gl); 1651 globfree(&gl);
1413 continue; 1652 continue;
1414 } else
1415 abort();
1416 } 1653 }
1654 }
1655
1417 if (*path != '/') 1656 if (*path != '/')
1418 continue; 1657 continue;
1419 1658
1420 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1421
1422 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
1423 break;
1424 } 1660 }
1425 ldpaths[i] = NULL;
1426 1661
1427 fclose(fp); 1662 fclose(fp);
1428 return i; 1663 return i;
1429} 1664}
1430#endif
1431 1665
1432#if defined(__FreeBSD__) || (__DragonFly__) 1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1667
1433static int load_ld_so_hints(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1434{ 1669{
1435 FILE *fp = NULL; 1670 FILE *fp = NULL;
1436 char *b = NULL, *p; 1671 char *b = NULL, *p;
1437 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1438 1673 char _fname[__PAX_UTILS_PATH_MAX];
1439 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1674
1440 return i; 1675 fname = maybe_add_root(fname, _fname);
1441 1676
1442 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1443 return i; 1678 return i;
1444 1679
1445 if ( fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1446 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 || 1681 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1447 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1 1682 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1448 ) { 1683 {
1449 fclose(fp); 1684 fclose(fp);
1450 return i; 1685 return i;
1451 } 1686 }
1452 1687
1453 b = (char*)malloc(hdr.dirlistlen+1); 1688 b = xmalloc(hdr.dirlistlen + 1);
1454 if ( fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1 ) { 1689 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1455 fclose(fp); 1690 fclose(fp);
1456 free(b); 1691 free(b);
1457 return i; 1692 return i;
1458 } 1693 }
1459 1694
1460 while ( (p = strsep(&b, ":")) ) { 1695 while ((p = strsep(&b, ":"))) {
1461 if ( *p == '\0' ) continue; 1696 if (*p == '\0')
1462 ldpaths[i++] = xstrdup(p); 1697 continue;
1463 1698 xarraypush(ldpaths, p, strlen(p));
1464 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
1465 break;
1466 } 1699 }
1467 ldpaths[i] = NULL; 1700
1468
1469 free(b); 1701 free(b);
1470 fclose(fp); 1702 fclose(fp);
1471 return i; 1703 return i;
1472} 1704}
1705
1706#else
1707#ifdef __ELF__
1708#warning Cache config support not implemented for your target
1473#endif 1709#endif
1710static int load_ld_cache_config(int i, const char *fname)
1711{
1712 return 0;
1713}
1714#endif
1474 1715
1475/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1476static void scanelf_ldpath() 1717static void scanelf_ldpath(void)
1477{ 1718{
1478 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1479 int i = 0; 1722 int i = 0;
1480 1723
1481 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1482 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1483 1726
1484 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1485 1728
1486 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1487 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1488 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1489 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1490 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1491 ++i; 1734 ++i;
1492 } 1735 }
1493 1736
1494 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1495 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1496 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1739 if (!scan_ull) scanelf_dir("/usr/local/lib");
1497} 1740}
1498 1741
1499/* scan env PATH for paths */ 1742/* scan env PATH for paths */
1500static void scanelf_envpath() 1743static void scanelf_envpath(void)
1501{ 1744{
1502 char *path, *p; 1745 char *path, *p;
1503 1746
1504 path = getenv("PATH"); 1747 path = getenv("PATH");
1505 if (!path) 1748 if (!path)
1512 } 1755 }
1513 1756
1514 free(path); 1757 free(path);
1515} 1758}
1516 1759
1517/* usage / invocation handling functions */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1518#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"
1519#define a_argument required_argument 1762#define a_argument required_argument
1520static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1521 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1522 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1523 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1524 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1525 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1526 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1527 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1540 {"lib", a_argument, NULL, 'N'}, 1784 {"lib", a_argument, NULL, 'N'},
1541 {"gmatch", no_argument, NULL, 'g'}, 1785 {"gmatch", no_argument, NULL, 'g'},
1542 {"textrels", no_argument, NULL, 'T'}, 1786 {"textrels", no_argument, NULL, 'T'},
1543 {"etype", a_argument, NULL, 'E'}, 1787 {"etype", a_argument, NULL, 'E'},
1544 {"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'},
1545 {"all", no_argument, NULL, 'a'}, 1794 {"all", no_argument, NULL, 'a'},
1546 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1547 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1548 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1549 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1550 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1551 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1552 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1553 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1554 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1555}; 1805};
1556 1806
1557static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1558 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1559 "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)",
1560 "Scan directories recursively", 1811 "Scan directories recursively",
1561 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1562 "Don't scan symlinks", 1813 "Don't scan symlinks",
1563 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1564 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1573 "Print BIND information", 1824 "Print BIND information",
1574 "Print SONAME information", 1825 "Print SONAME information",
1575 "Find a specified symbol", 1826 "Find a specified symbol",
1576 "Find a specified section", 1827 "Find a specified section",
1577 "Find a specified library", 1828 "Find a specified library",
1578 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1579 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1580 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1581 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1582 "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",
1583 "Only output 'bad' things", 1839 "Only output 'bad' things",
1584 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1585 "Use specified format for output", 1841 "Use specified format for output",
1586 "Read input stream from a filename", 1842 "Read input stream from a filename",
1587 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1588 "Don't display the header", 1845 "Don't display the header",
1589 "Print this help and exit", 1846 "Print this help and exit",
1590 "Print version and exit", 1847 "Print version and exit",
1591 NULL 1848 NULL
1592}; 1849};
1598 printf("* Scan ELF binaries for stuff\n\n" 1855 printf("* Scan ELF binaries for stuff\n\n"
1599 "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);
1600 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1601 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1602 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1603 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",
1604 long_opts[i].name, opts_help[i]); 1864 long_opts[i].name, opts_help[i]);
1605 else 1865 else
1606 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1607 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1608 1868
1609 if (status != EXIT_SUCCESS) 1869 puts("\nFor more information, see the scanelf(1) manpage");
1610 exit(status);
1611
1612 puts("\nThe format modifiers for the -F option are:");
1613 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1614 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1615 puts(" i INTERP \tb BIND \ts symbol");
1616 puts(" N library \to Type \tT TEXTRELs");
1617 puts(" S SONAME \tk section");
1618 puts(" p filename (with search path removed)");
1619 puts(" f filename (short name/basename)");
1620 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1621
1622 puts("\nELF Etypes:");
1623 print_etypes(stdout);
1624
1625 exit(status); 1870 exit(status);
1626} 1871}
1627 1872
1628/* 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 }
1629static void parseargs(int argc, char *argv[]) 1882static int parseargs(int argc, char *argv[])
1630{ 1883{
1631 int i; 1884 int i;
1632 const char *from_file = NULL; 1885 const char *from_file = NULL;
1886 int ret = 0;
1633 1887
1634 opterr = 0; 1888 opterr = 0;
1635 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) {
1636 switch (i) { 1890 switch (i) {
1637 1891
1645 case 'f': 1899 case 'f':
1646 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");
1647 from_file = optarg; 1901 from_file = optarg;
1648 break; 1902 break;
1649 case 'E': 1903 case 'E':
1650 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1651 break; 1905 break;
1652 case 'M': 1906 case 'M':
1653 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;
1654 break; 1918 break;
1655 case 'o': { 1919 case 'o': {
1656 FILE *fp = NULL;
1657 if ((fp = freopen(optarg, "w", stdout)) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1658 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1659 SET_STDOUT(fp);
1660 break; 1922 break;
1661 } 1923 }
1662 case 'k': 1924 case 'k':
1663 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1664 find_section = optarg;
1665 break; 1926 break;
1666 case 's': { 1927 case 's': {
1667 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");
1668 find_sym = optarg; 1929 find_sym = optarg;
1669 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1670 sprintf(versioned_symname, "%s@", find_sym);
1671 break; 1930 break;
1672 } 1931 }
1673 case 'N': { 1932 case 'N':
1674 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1675 find_lib = optarg;
1676 break; 1934 break;
1677 }
1678
1679 case 'F': { 1935 case 'F': {
1680 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");
1681 out_format = optarg; 1937 out_format = optarg;
1682 break; 1938 break;
1683 } 1939 }
1684 case 'z': { 1940 case 'z': {
1685 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1941 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1686 size_t x; 1942 size_t x;
1687 1943
1688 for (x = 0 ; x < strlen(optarg); x++) { 1944 for (x = 0; x < strlen(optarg); x++) {
1689 switch(optarg[x]) { 1945 switch (optarg[x]) {
1690 case 'p': 1946 case 'p':
1691 case 'P': 1947 case 'P':
1692 do_state(optarg[x], PAGEEXEC); 1948 do_pax_state(optarg[x], PAGEEXEC);
1693 break; 1949 break;
1694 case 's': 1950 case 's':
1695 case 'S': 1951 case 'S':
1696 do_state(optarg[x], SEGMEXEC); 1952 do_pax_state(optarg[x], SEGMEXEC);
1697 break; 1953 break;
1698 case 'm': 1954 case 'm':
1699 case 'M': 1955 case 'M':
1700 do_state(optarg[x], MPROTECT); 1956 do_pax_state(optarg[x], MPROTECT);
1701 break; 1957 break;
1702 case 'e': 1958 case 'e':
1703 case 'E': 1959 case 'E':
1704 do_state(optarg[x], EMUTRAMP); 1960 do_pax_state(optarg[x], EMUTRAMP);
1705 break; 1961 break;
1706 case 'r': 1962 case 'r':
1707 case 'R': 1963 case 'R':
1708 do_state(optarg[x], RANDMMAP); 1964 do_pax_state(optarg[x], RANDMMAP);
1709 break; 1965 break;
1710 case 'x': 1966 case 'x':
1711 case 'X': 1967 case 'X':
1712 do_state(optarg[x], RANDEXEC); 1968 do_pax_state(optarg[x], RANDEXEC);
1713 break; 1969 break;
1714 default: 1970 default:
1715 break; 1971 break;
1716 } 1972 }
1717 } 1973 }
1722 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1978 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1723 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1979 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1724 setpax = flags; 1980 setpax = flags;
1725 break; 1981 break;
1726 } 1982 }
1983 case 'Z': show_size = 1; break;
1727 case 'g': gmatch = 1; break; 1984 case 'g': g_match = 1; break;
1728 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1729 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1730 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1731 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1732 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1733 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1734 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1735 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1743 case 'b': show_bind = 1; break; 2001 case 'b': show_bind = 1; break;
1744 case 'S': show_soname = 1; break; 2002 case 'S': show_soname = 1; break;
1745 case 'T': show_textrels = 1; break; 2003 case 'T': show_textrels = 1; break;
1746 case 'q': be_quiet = 1; break; 2004 case 'q': be_quiet = 1; break;
1747 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1748 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;
1749 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;
1750 case ':': 2013 case ':':
1751 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1752 case '?': 2015 case '?':
1753 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1754 default: 2017 default:
1755 err("Unhandled option '%c'; please report this", i); 2018 err("Unhandled option '%c'; please report this", i);
1756 } 2019 }
1757 } 2020 }
1758 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);
1759 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1760 if (out_format) { 2031 if (out_format) {
1761 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1762 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1763 show_textrels = 0; 2034 show_textrels = show_perms = show_endian = show_size = \
2035 show_osabi = show_eabi = 0;
1764 for (i = 0; out_format[i]; ++i) { 2036 for (i = 0; out_format[i]; ++i) {
1765 if (!IS_MODIFIER(out_format[i])) continue; 2037 if (!IS_MODIFIER(out_format[i])) continue;
1766 2038
1767 switch (out_format[++i]) { 2039 switch (out_format[++i]) {
1768 case '+': break; 2040 case '+': break;
1773 case 'f': break; 2045 case 'f': break;
1774 case 'k': break; 2046 case 'k': break;
1775 case 's': break; 2047 case 's': break;
1776 case 'N': break; 2048 case 'N': break;
1777 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;
1778 case 'x': show_pax = 1; break; 2057 case 'x': show_pax = 1; break;
1779 case 'e': show_phdr = 1; break; 2058 case 'e': show_phdr = 1; break;
1780 case 't': show_textrel = 1; break; 2059 case 't': show_textrel = 1; break;
1781 case 'r': show_rpath = 1; break; 2060 case 'r': show_rpath = 1; break;
1782 case 'n': show_needed = 1; break; 2061 case 'n': show_needed = 1; break;
1783 case 'i': show_interp = 1; break; 2062 case 'i': show_interp = 1; break;
1784 case 'b': show_bind = 1; break; 2063 case 'b': show_bind = 1; break;
1785 case 'S': show_soname = 1; break; 2064 case 'S': show_soname = 1; break;
1786 case 'T': show_textrels = 1; break; 2065 case 'T': show_textrels = 1; break;
1787 default: 2066 default:
1788 err("Invalid format specifier '%c' (byte %i)", 2067 err("Invalid format specifier '%c' (byte %i)",
1789 out_format[i], i+1); 2068 out_format[i], i+1);
1790 } 2069 }
1791 } 2070 }
1792 2071
1793 /* construct our default format */ 2072 /* construct our default format */
1794 } else { 2073 } else {
1795 size_t fmt_len = 30; 2074 size_t fmt_len = 30;
1796 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2075 out_format = xmalloc(sizeof(char) * fmt_len);
2076 *out_format = '\0';
1797 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2077 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1798 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);
1799 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2084 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1800 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2085 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1801 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2086 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1802 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2087 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1803 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2088 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1811 } 2096 }
1812 if (be_verbose > 2) printf("Format: %s\n", out_format); 2097 if (be_verbose > 2) printf("Format: %s\n", out_format);
1813 2098
1814 /* now lets actually do the scanning */ 2099 /* now lets actually do the scanning */
1815 if (scan_ldpath || use_ldcache) 2100 if (scan_ldpath || use_ldcache)
1816#if defined(__GLIBC__) || defined(__UCLIBC__) 2101 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1817 load_ld_so_conf(0, "/etc/ld.so.conf");
1818#elif defined(__FreeBSD__) || defined(__DragonFly__)
1819 load_ld_so_hints(0, _PATH_ELF_HINTS);
1820#endif
1821 if (scan_ldpath) scanelf_ldpath(); 2102 if (scan_ldpath) scanelf_ldpath();
1822 if (scan_envpath) scanelf_envpath(); 2103 if (scan_envpath) scanelf_envpath();
1823 if (!from_file && optind == argc && ttyname(0) == NULL) 2104 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1824 from_file = "-"; 2105 from_file = "-";
1825 if (from_file) { 2106 if (from_file) {
1826 scanelf_from_file(from_file); 2107 scanelf_from_file(from_file);
1827 from_file = *argv; 2108 from_file = *argv;
1828 } 2109 }
1829 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 2110 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1830 err("Nothing to scan !?"); 2111 err("Nothing to scan !?");
1831 while (optind < argc) { 2112 while (optind < argc) {
1832 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1833 scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1834 } 2115 }
1835 2116
1836 /* clean up */ 2117 /* clean up */
1837 if (versioned_symname) free(versioned_symname);
1838 for (i = 0; ldpaths[i]; ++i)
1839 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1840 2123
1841 if (ldcache != 0) 2124 if (ldcache != 0)
1842 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
2126 return ret;
1843} 2127}
1844 2128
1845static char **get_split_env(const char *envvar) { 2129static char **get_split_env(const char *envvar)
2130{
2131 const char *delims = " \t\n";
1846 char **envvals = NULL; 2132 char **envvals = NULL;
1847 char *saveptr = NULL;
1848 char *env; 2133 char *env, *s;
1849 char *s;
1850 int nentry; 2134 int nentry;
1851 2135
1852 if ((env = getenv(envvar)) == NULL) 2136 if ((env = getenv(envvar)) == NULL)
1853 return NULL; 2137 return NULL;
1854 2138
1855 env = xstrdup(env); 2139 env = xstrdup(env);
1856 if (env == NULL) 2140 if (env == NULL)
1857 return NULL; 2141 return NULL;
1858 2142
2143 s = strtok(env, delims);
2144 if (s == NULL) {
2145 free(env);
2146 return NULL;
2147 }
2148
1859 nentry = 0; 2149 nentry = 0;
1860 for (s = strtok_r(env, " \t\n", &saveptr); s != NULL; s = strtok_r(NULL, " \t\n", &saveptr)) { 2150 while (s != NULL) {
2151 ++nentry;
1861 if ((envvals = xrealloc(envvals, sizeof(char *)*(nentry+1))) == NULL) 2152 envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
1862 return NULL;
1863 envvals[nentry++] = s; 2153 envvals[nentry-1] = s;
2154 s = strtok(NULL, delims);
1864 } 2155 }
1865 envvals[nentry] = NULL; 2156 envvals[nentry] = NULL;
1866 2157
2158 /* don't want to free(env) as it contains the memory that backs
2159 * the envvals array of strings */
1867 return envvals; 2160 return envvals;
1868} 2161}
1869 2162
1870static void parseenv() { 2163static void parseenv(void)
2164{
2165 color_init(false);
1871 qa_textrels=get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
1872 qa_execstack=get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
2168 qa_wx_load = get_split_env("QA_WX_LOAD");
1873} 2169}
1874 2170
1875 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
1876 2180
1877int main(int argc, char *argv[]) 2181int main(int argc, char *argv[])
1878{ 2182{
2183 int ret;
1879 if (argc < 2) 2184 if (argc < 2)
1880 usage(EXIT_FAILURE); 2185 usage(EXIT_FAILURE);
1881 parseenv(); 2186 parseenv();
1882 parseargs(argc, argv); 2187 ret = parseargs(argc, argv);
1883 fclose(stdout); 2188 fclose(stdout);
1884#ifdef __BOUNDS_CHECKING_ON 2189#ifdef __PAX_UTILS_CLEANUP
1885 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");
1886#endif 2194#endif
1887 return EXIT_SUCCESS; 2195 return ret;
1888} 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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