/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.88 Revision 1.184
1/* 1/*
2 * Copyright 2003-2005 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 1.88 2005/09/30 03:30:54 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.184 2007/08/12 16:35:25 vapier Exp $
5 * 5 *
6 * Copyright 2003-2005 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2005 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10#include <stdio.h>
11#include <stdlib.h>
12#include <sys/types.h>
13#include <libgen.h>
14#include <limits.h>
15#define __USE_GNU
16#include <string.h>
17#include <errno.h>
18#include <unistd.h>
19#include <sys/stat.h>
20#include <dirent.h>
21#include <getopt.h>
22#include <assert.h>
23#include "paxelf.h" 10#include "paxinc.h"
24 11
25static const char *rcsid = "$Id: scanelf.c,v 1.88 2005/09/30 03:30:54 vapier Exp $"; 12static const char *rcsid = "$Id: scanelf.c,v 1.184 2007/08/12 16:35:25 vapier Exp $";
26#define argv0 "scanelf" 13#define argv0 "scanelf"
27 14
28#define IS_MODIFIER(c) (c == '%' || c == '#') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
29
30
31 16
32/* prototypes */ 17/* prototypes */
33static void scanelf_file(const char *filename); 18static int file_matches_list(const char *filename, char **matchlist);
19static int scanelf_elfobj(elfobj *elf);
20static int scanelf_elf(const char *filename, int fd, size_t len);
21static int scanelf_archive(const char *filename, int fd, size_t len);
22static int scanelf_file(const char *filename, const struct stat *st_cache);
34static void scanelf_dir(const char *path); 23static int scanelf_dir(const char *path);
35static void scanelf_ldpath(); 24static void scanelf_ldpath(void);
36static void scanelf_envpath(); 25static void scanelf_envpath(void);
37static void usage(int status); 26static void usage(int status);
27static char **get_split_env(const char *envvar);
28static void parseenv(void);
38static void parseargs(int argc, char *argv[]); 29static int parseargs(int argc, char *argv[]);
39static char *xstrdup(const char *s); 30static char *xstrdup(const char *s);
40static void *xmalloc(size_t size); 31static void *xmalloc(size_t size);
32static void *xrealloc(void *ptr, size_t size);
41static void xstrcat(char **dst, const char *src, size_t *curr_len); 33static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
34#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
42static inline void xchrcat(char **dst, const char append, size_t *curr_len); 35static inline void xchrcat(char **dst, const char append, size_t *curr_len);
36static int rematch(const char *regex, const char *match, int cflags);
43 37
44/* variables to control behavior */ 38/* variables to control behavior */
39static char match_etypes[126] = "";
45static char *ldpaths[256]; 40static char *ldpaths[256];
46static char scan_ldpath = 0; 41static char scan_ldpath = 0;
47static char scan_envpath = 0; 42static char scan_envpath = 0;
48static char scan_symlink = 1; 43static char scan_symlink = 1;
44static char scan_archives = 0;
49static char dir_recurse = 0; 45static char dir_recurse = 0;
50static char dir_crossmount = 1; 46static char dir_crossmount = 1;
51static char show_pax = 0; 47static char show_pax = 0;
48static char show_perms = 0;
52static char show_phdr = 0; 49static char show_phdr = 0;
53static char show_textrel = 0; 50static char show_textrel = 0;
54static char show_rpath = 0; 51static char show_rpath = 0;
55static char show_needed = 0; 52static char show_needed = 0;
56static char show_interp = 0; 53static char show_interp = 0;
57static char show_bind = 0; 54static char show_bind = 0;
58static char show_soname = 0; 55static char show_soname = 0;
59static char show_textrels = 0; 56static char show_textrels = 0;
60static char show_banner = 1; 57static char show_banner = 1;
58static char show_endian = 0;
61static char be_quiet = 0; 59static char be_quiet = 0;
62static char be_verbose = 0; 60static char be_verbose = 0;
63static char be_wewy_wewy_quiet = 0; 61static char be_wewy_wewy_quiet = 0;
62static char be_semi_verbose = 0;
64static char *find_sym = NULL, *versioned_symname = NULL; 63static char *find_sym = NULL, *versioned_symname = NULL;
65static char *find_lib = NULL; 64static char *find_lib = NULL;
65static char *find_section = NULL;
66static char *out_format = NULL; 66static char *out_format = NULL;
67static char *search_path = NULL; 67static char *search_path = NULL;
68static char fix_elf = 0;
68static char gmatch = 0; 69static char g_match = 0;
70static char use_ldcache = 0;
69 71
72static char **qa_textrels = NULL;
73static char **qa_execstack = NULL;
74static char **qa_wx_load = NULL;
75
76int match_bits = 0;
77unsigned int match_perms = 0;
78caddr_t ldcache = 0;
79size_t ldcache_size = 0;
80unsigned long setpax = 0UL;
81
82int has_objdump = 0;
83
84static char *getstr_perms(const char *fname);
85static char *getstr_perms(const char *fname) {
86 struct stat st;
87 static char buf[8];
88
89 if ((stat(fname, &st)) == (-1))
90 return (char *) "";
91
92 snprintf(buf, sizeof(buf), "%o", st.st_mode);
93
94 return (char *) buf + 2;
95}
96
97/* find the path to a file by name */
98static char *which(const char *fname)
99{
100 static char fullpath[BUFSIZ];
101 char *path, *p;
102
103 path = getenv("PATH");
104 if (!path)
105 return NULL;
106
107 path = xstrdup(path);
108 while ((p = strrchr(path, ':')) != NULL) {
109 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
110 *p = 0;
111 if (access(fullpath, R_OK) != (-1)) {
112 free(path);
113 return (char *) fullpath;
114 }
115 }
116 free(path);
117 return NULL;
118}
119
120/* 1 on failure. 0 otherwise */
121static int rematch(const char *regex, const char *match, int cflags)
122{
123 regex_t preg;
124 int ret;
125
126 if ((match == NULL) || (regex == NULL))
127 return EXIT_FAILURE;
128
129
130 if ((ret = regcomp(&preg, regex, cflags))) {
131 char err[256];
132
133 if (regerror(ret, &preg, err, sizeof(err)))
134 fprintf(stderr, "regcomp failed: %s", err);
135 else
136 fprintf(stderr, "regcomp failed");
137
138 return EXIT_FAILURE;
139 }
140 ret = regexec(&preg, match, 0, NULL, 0);
141 regfree(&preg);
142
143 return ret;
144}
70 145
71/* sub-funcs for scanelf_file() */ 146/* sub-funcs for scanelf_file() */
72static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 147static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
73{ 148{
74 /* find the best SHT_DYNSYM and SHT_STRTAB sections */ 149 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
93 } \ 168 } \
94 } 169 }
95 GET_SYMTABS(32) 170 GET_SYMTABS(32)
96 GET_SYMTABS(64) 171 GET_SYMTABS(64)
97} 172}
173
98static char *scanelf_file_pax(elfobj *elf, char *found_pax) 174static char *scanelf_file_pax(elfobj *elf, char *found_pax)
99{ 175{
100 static char *paxflags;
101 static char ret[7]; 176 static char ret[7];
102 unsigned long i, shown; 177 unsigned long i, shown;
103 178
104 if (!show_pax) return NULL; 179 if (!show_pax) return NULL;
105 180
112 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 187 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
113 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 188 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
114 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 189 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
115 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \ 190 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \
116 continue; \ 191 continue; \
117 if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \ 192 if (fix_elf && setpax) { \
193 /* set the paxctl flags */ \
194 ESET(phdr[i].p_flags, setpax); \
195 } \
196 if (be_quiet && (EGET(phdr[i].p_flags) == (PF_NOEMUTRAMP | PF_NORANDEXEC))) \
118 continue; \ 197 continue; \
119 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \ 198 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \
120 *found_pax = 1; \ 199 *found_pax = 1; \
121 ++shown; \ 200 ++shown; \
122 break; \ 201 break; \
124 } 203 }
125 SHOW_PAX(32) 204 SHOW_PAX(32)
126 SHOW_PAX(64) 205 SHOW_PAX(64)
127 } 206 }
128 207
208
209 if (fix_elf && setpax) {
210 /* set the chpax settings */
211 if (elf->elf_class == ELFCLASS32) {
212 if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC)
213 ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
214 } else {
215 if (EHDR64(elf->ehdr)->e_type == ET_DYN || EHDR64(elf->ehdr)->e_type == ET_EXEC)
216 ESET(EHDR64(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
217 }
218 }
219
129 /* fall back to EI_PAX if no PT_PAX was found */ 220 /* fall back to EI_PAX if no PT_PAX was found */
130 if (!*ret) { 221 if (!*ret) {
222 static char *paxflags;
131 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); 223 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
132 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) { 224 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
133 *found_pax = 1; 225 *found_pax = 1;
134 return paxflags; 226 return (be_wewy_wewy_quiet ? NULL : paxflags);
135 } 227 }
136 strncpy(ret, paxflags, sizeof(ret)); 228 strncpy(ret, paxflags, sizeof(ret));
137 } 229 }
138 230
139 if (be_quiet && !shown) 231 if (be_wewy_wewy_quiet || (be_quiet && !shown))
140 return NULL; 232 return NULL;
233 else
141 return ret; 234 return ret;
142
143} 235}
236
144static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load) 237static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load)
145{ 238{
146 static char ret[12]; 239 static char ret[12];
147 char *found; 240 char *found;
148 unsigned long i, off, shown, check_flags;
149 unsigned char multi_stack, multi_relro, multi_load; 241 unsigned long i, shown, multi_stack, multi_relro, multi_load;
242 int max_pt_load;
150 243
151 if (!show_phdr) return NULL; 244 if (!show_phdr) return NULL;
152 245
153 memcpy(ret, "--- --- ---\0", 12); 246 memcpy(ret, "--- --- ---\0", 12);
154 247
155 shown = 0; 248 shown = 0;
156 multi_stack = multi_relro = multi_load = 0; 249 multi_stack = multi_relro = multi_load = 0;
250 max_pt_load = elf_max_pt_load(elf);
157 251
158 if (elf->phdr) { 252#define NOTE_GNU_STACK ".note.GNU-stack"
159#define SHOW_PHDR(B) \ 253#define SHOW_PHDR(B) \
160 if (elf->elf_class == ELFCLASS ## B) { \ 254 if (elf->elf_class == ELFCLASS ## B) { \
161 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 255 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
256 Elf ## B ## _Off offset; \
257 uint32_t flags, check_flags; \
258 if (elf->phdr != NULL) { \
162 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 259 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
163 uint32_t flags; \
164 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 260 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
165 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 261 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
262 if (multi_stack++) \
166 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ 263 warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
264 if (file_matches_list(elf->filename, qa_execstack)) \
265 continue; \
167 found = found_phdr; \ 266 found = found_phdr; \
168 off = 0; \ 267 offset = 0; \
169 check_flags = PF_X; \ 268 check_flags = PF_X; \
170 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \ 269 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
270 if (multi_relro++) \
171 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 271 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
172 found = found_relro; \ 272 found = found_relro; \
173 off = 4; \ 273 offset = 4; \
174 check_flags = PF_X; \ 274 check_flags = PF_X; \
175 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 275 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
176 if (multi_load++ > 2) warnf("%s: more than 2 PT_LOAD's !?", elf->filename); \ 276 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \
277 if (multi_load++ > max_pt_load) \
278 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
279 if (file_matches_list(elf->filename, qa_wx_load)) \
280 continue; \
177 found = found_load; \ 281 found = found_load; \
178 off = 8; \ 282 offset = 8; \
179 check_flags = PF_W|PF_X; \ 283 check_flags = PF_W|PF_X; \
180 } else \ 284 } else \
181 continue; \ 285 continue; \
182 flags = EGET(phdr[i].p_flags); \ 286 flags = EGET(phdr[i].p_flags); \
183 if (be_quiet && ((flags & check_flags) != check_flags)) \ 287 if (be_quiet && ((flags & check_flags) != check_flags)) \
184 continue; \ 288 continue; \
289 if ((EGET(phdr[i].p_type) != PT_LOAD) && (fix_elf && ((flags & PF_X) != flags))) { \
290 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \
291 ret[3] = ret[7] = '!'; \
292 flags = EGET(phdr[i].p_flags); \
293 } \
185 memcpy(ret+off, gnu_short_stack_flags(flags), 3); \ 294 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
186 *found = 1; \ 295 *found = 1; \
187 ++shown; \ 296 ++shown; \
297 } \
298 } else if (elf->shdr != NULL) { \
299 /* no program headers which means this is prob an object file */ \
300 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
301 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
302 char *str; \
303 if ((void*)strtbl > (void*)elf->data_end) \
304 goto skip_this_shdr##B; \
305 check_flags = SHF_WRITE|SHF_EXECINSTR; \
306 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
307 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
308 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
309 str = elf->data + offset; \
310 if (str > elf->data + offset + sizeof(NOTE_GNU_STACK)) continue; \
311 if (!strcmp(str, NOTE_GNU_STACK)) { \
312 if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \
313 flags = EGET(shdr[i].sh_flags); \
314 if (be_quiet && ((flags & check_flags) != check_flags)) \
315 continue; \
316 ++*found_phdr; \
317 shown = 1; \
318 if (flags & SHF_WRITE) ret[0] = 'W'; \
319 if (flags & SHF_ALLOC) ret[1] = 'A'; \
320 if (flags & SHF_EXECINSTR) ret[2] = 'X'; \
321 if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \
322 break; \
323 } \
324 } \
325 skip_this_shdr##B: \
326 if (!multi_stack) { \
327 if (file_matches_list(elf->filename, qa_execstack)) \
328 return NULL; \
329 *found_phdr = 1; \
330 shown = 1; \
331 memcpy(ret, "!WX", 3); \
332 } \
188 } \ 333 } \
189 } 334 }
190 SHOW_PHDR(32) 335 SHOW_PHDR(32)
191 SHOW_PHDR(64) 336 SHOW_PHDR(64)
192 }
193 337
194 if (be_quiet && !shown) 338 if (be_wewy_wewy_quiet || (be_quiet && !shown))
195 return NULL; 339 return NULL;
196 else 340 else
197 return ret; 341 return ret;
198} 342}
343
199static char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 344static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
200{ 345{
201 static char ret[] = "TEXTREL"; 346 static const char *ret = "TEXTREL";
202 unsigned long i; 347 unsigned long i;
203 348
204 if (!show_textrel && !show_textrels) return NULL; 349 if (!show_textrel && !show_textrels) return NULL;
350
351 if (file_matches_list(elf->filename, qa_textrels)) return NULL;
205 352
206 if (elf->phdr) { 353 if (elf->phdr) {
207#define SHOW_TEXTREL(B) \ 354#define SHOW_TEXTREL(B) \
208 if (elf->elf_class == ELFCLASS ## B) { \ 355 if (elf->elf_class == ELFCLASS ## B) { \
209 Elf ## B ## _Dyn *dyn; \ 356 Elf ## B ## _Dyn *dyn; \
229 } 376 }
230 377
231 if (be_quiet || be_wewy_wewy_quiet) 378 if (be_quiet || be_wewy_wewy_quiet)
232 return NULL; 379 return NULL;
233 else 380 else
234 return (char *)" - "; 381 return " - ";
235} 382}
383
236static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) 384static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
237{ 385{
238 unsigned long s, r, rmax; 386 unsigned long s, r, rmax;
239 void *symtab_void, *strtab_void, *text_void; 387 void *symtab_void, *strtab_void, *text_void;
240 388
292 if (be_verbose <= 2) continue; \ 440 if (be_verbose <= 2) continue; \
293 } else \ 441 } else \
294 *found_textrels = 1; \ 442 *found_textrels = 1; \
295 /* locate this relocation symbol name */ \ 443 /* locate this relocation symbol name */ \
296 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 444 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
445 if ((void*)sym > (void*)elf->data_end) { \
446 warn("%s: corrupt ELF symbol", elf->filename); \
447 continue; \
448 } \
297 sym_max = ELF ## B ## _R_SYM(r_info); \ 449 sym_max = ELF ## B ## _R_SYM(r_info); \
298 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 450 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
299 sym += sym_max; \ 451 sym += sym_max; \
300 else \ 452 else \
301 sym = NULL; \ 453 sym = NULL; \
303 /* show the raw details about this reloc */ \ 455 /* show the raw details about this reloc */ \
304 printf(" %s: ", elf->base_filename); \ 456 printf(" %s: ", elf->base_filename); \
305 if (sym && sym->st_name) \ 457 if (sym && sym->st_name) \
306 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \ 458 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \
307 else \ 459 else \
308 printf("(memory/fake?)"); \ 460 printf("(memory/data?)"); \
309 printf(" [0x%lX]", (unsigned long)r_offset); \ 461 printf(" [0x%lX]", (unsigned long)r_offset); \
310 /* now try to find the closest symbol that this rel is probably in */ \ 462 /* now try to find the closest symbol that this rel is probably in */ \
311 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 463 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
312 func = NULL; \ 464 func = NULL; \
313 offset_tmp = 0; \ 465 offset_tmp = 0; \
317 offset_tmp = EGET(sym->st_value); \ 469 offset_tmp = EGET(sym->st_value); \
318 } \ 470 } \
319 ++sym; \ 471 ++sym; \
320 } \ 472 } \
321 printf(" in "); \ 473 printf(" in "); \
322 if (func && func->st_name) \ 474 if (func && func->st_name) { \
323 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \ 475 const char *func_name = elf->data + EGET(strtab->sh_offset) + EGET(func->st_name); \
476 if (r_offset > EGET(func->st_size)) \
477 printf("(optimized out: previous %s)", func_name); \
324 else \ 478 else \
325 printf("(NULL: fake?)"); \ 479 printf("%s", func_name); \
480 } else \
481 printf("(optimized out)"); \
326 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 482 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
483 if (be_verbose && has_objdump) { \
484 char *sysbuf; \
485 size_t syslen; \
486 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"; \
487 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
488 sysbuf = xmalloc(syslen); \
489 if (sysbuf) { \
490 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
491 if (end_addr < r_offset) \
492 /* not uncommon when things are optimized out */ \
493 end_addr = r_offset + 0x100; \
494 snprintf(sysbuf, syslen, sysfmt, \
495 (unsigned long)offset_tmp, \
496 (unsigned long)end_addr, \
497 elf->filename, \
498 (unsigned long)r_offset); \
499 fflush(stdout); \
500 system(sysbuf); \
501 fflush(stdout); \
502 free(sysbuf); \
503 } \
504 } \
327 } \ 505 } \
328 } } 506 } }
329 SHOW_TEXTRELS(32) 507 SHOW_TEXTRELS(32)
330 SHOW_TEXTRELS(64) 508 SHOW_TEXTRELS(64)
331 } 509 }
333 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename); 511 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
334 512
335 return NULL; 513 return NULL;
336} 514}
337 515
338static void rpath_security_checks(elfobj *, char *); 516static void rpath_security_checks(elfobj *, char *, const char *);
339static void rpath_security_checks(elfobj *elf, char *item) { 517static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
518{
340 struct stat st; 519 struct stat st;
341 switch (*item) { 520 switch (*item) {
342 case 0:
343 warnf("Security problem NULL RPATH in %s", elf->filename);
344 break;
345 case '/': break; 521 case '/': break;
522 case '.':
523 warnf("Security problem with relative %s '%s' in %s", dt_type, item, elf->filename);
524 break;
525 case ':':
526 case '\0':
527 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
528 break;
346 case '$': 529 case '$':
347 if (fstat(elf->fd, &st) != -1) 530 if (fstat(elf->fd, &st) != -1)
348 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 531 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
349 warnf("Security problem with RPATH='%s' in %s with mode set of %o", 532 warnf("Security problem with %s='%s' in %s with mode set of %o",
350 item, elf->filename, st.st_mode & 07777); 533 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
351 break; 534 break;
352 default: 535 default:
353 warnf("Maybe? sec problem with RPATH='%s' in %s", item, elf->filename); 536 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
354 break; 537 break;
355 } 538 }
356} 539}
357static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) 540static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
358{ 541{
394 /* Verify the memory is somewhat sane */ \ 577 /* Verify the memory is somewhat sane */ \
395 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 578 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
396 if (offset < (Elf ## B ## _Off)elf->len) { \ 579 if (offset < (Elf ## B ## _Off)elf->len) { \
397 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 580 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
398 *r = (char*)(elf->data + offset); \ 581 *r = (char*)(elf->data + offset); \
582 /* cache the length in case we need to nuke this section later on */ \
583 if (fix_elf) \
584 offset = strlen(*r); \
399 /* If quiet, don't output paths in ld.so.conf */ \ 585 /* If quiet, don't output paths in ld.so.conf */ \
400 if (be_quiet) { \ 586 if (be_quiet) { \
401 size_t len; \ 587 size_t len; \
402 char *start, *end; \ 588 char *start, *end; \
403 /* note that we only 'chop' off leading known paths. */ \ 589 /* note that we only 'chop' off leading known paths. */ \
404 /* since *r is read-only memory, we can only move the ptr forward. */ \ 590 /* since *r is read-only memory, we can only move the ptr forward. */ \
405 start = *r; \ 591 start = *r; \
406 /* scan each path in : delimited list */ \ 592 /* scan each path in : delimited list */ \
407 while (start) { \ 593 while (start) { \
408 rpath_security_checks(elf, start); \ 594 rpath_security_checks(elf, start, get_elfdtype(word)); \
409 end = strchr(start, ':'); \ 595 end = strchr(start, ':'); \
410 len = (end ? abs(end - start) : strlen(start)); \ 596 len = (end ? abs(end - start) : strlen(start)); \
597 if (use_ldcache) \
411 for (s = 0; ldpaths[s]; ++s) { \ 598 for (s = 0; ldpaths[s]; ++s) \
412 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 599 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
413 *r = (end ? end + 1 : NULL); \ 600 *r = end; \
601 /* corner case ... if RPATH reads "/usr/lib:", we want \
602 * to show ':' rather than '' */ \
603 if (end && end[1] != '\0') \
604 (*r)++; \
414 break; \ 605 break; \
415 } \ 606 } \
416 } \
417 if (!*r || !ldpaths[s] || !end) \ 607 if (!*r || !end) \
418 start = NULL; \ 608 break; \
419 else \ 609 else \
420 start = start + len + 1; \ 610 start = start + len + 1; \
421 } \ 611 } \
422 } \ 612 } \
613 if (*r) { \
614 if (fix_elf > 2 || (fix_elf && **r == '\0')) { \
615 /* just nuke it */ \
616 nuke_it##B: \
617 memset(*r, 0x00, offset); \
618 *r = NULL; \
619 ESET(dyn->d_tag, DT_DEBUG); \
620 ESET(dyn->d_un.d_ptr, 0); \
621 } else if (fix_elf) { \
622 /* try to clean "bad" paths */ \
623 size_t len, tmpdir_len; \
624 char *start, *end; \
625 const char *tmpdir; \
626 start = *r; \
627 tmpdir = (getenv("TMPDIR") ? : "."); \
628 tmpdir_len = strlen(tmpdir); \
629 while (1) { \
630 end = strchr(start, ':'); \
631 if (start == end) { \
632 eat_this_path##B: \
633 len = strlen(end); \
634 memmove(start, end+1, len); \
635 start[len-1] = '\0'; \
636 end = start - 1; \
637 } else if (tmpdir && !strncmp(start, tmpdir, tmpdir_len)) { \
638 if (!end) { \
639 if (start == *r) \
640 goto nuke_it##B; \
641 *--start = '\0'; \
642 } else \
643 goto eat_this_path##B; \
644 } \
645 if (!end) \
646 break; \
647 start = end + 1; \
648 } \
649 if (**r == '\0') \
650 goto nuke_it##B; \
651 } \
652 if (*r) \
423 if (*r) *found_rpath = 1; \ 653 *found_rpath = 1; \
654 } \
424 } \ 655 } \
425 ++dyn; \ 656 ++dyn; \
426 } \ 657 } \
427 } } 658 } }
428 SHOW_RPATH(32) 659 SHOW_RPATH(32)
445 } else if (rpath || runpath) 676 } else if (rpath || runpath)
446 xstrcat(ret, (runpath ? runpath : rpath), ret_len); 677 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
447 else if (!be_quiet) 678 else if (!be_quiet)
448 xstrcat(ret, " - ", ret_len); 679 xstrcat(ret, " - ", ret_len);
449} 680}
681
682#define LDSO_CACHE_MAGIC "ld.so-"
683#define LDSO_CACHE_MAGIC_LEN (sizeof LDSO_CACHE_MAGIC -1)
684#define LDSO_CACHE_VER "1.7.0"
685#define LDSO_CACHE_VER_LEN (sizeof LDSO_CACHE_VER -1)
686#define FLAG_ANY -1
687#define FLAG_TYPE_MASK 0x00ff
688#define FLAG_LIBC4 0x0000
689#define FLAG_ELF 0x0001
690#define FLAG_ELF_LIBC5 0x0002
691#define FLAG_ELF_LIBC6 0x0003
692#define FLAG_REQUIRED_MASK 0xff00
693#define FLAG_SPARC_LIB64 0x0100
694#define FLAG_IA64_LIB64 0x0200
695#define FLAG_X8664_LIB64 0x0300
696#define FLAG_S390_LIB64 0x0400
697#define FLAG_POWERPC_LIB64 0x0500
698#define FLAG_MIPS64_LIBN32 0x0600
699#define FLAG_MIPS64_LIBN64 0x0700
700
701static char *lookup_cache_lib(elfobj *, char *);
702
703#if defined(__GLIBC__) || defined(__UCLIBC__)
704
705static char *lookup_cache_lib(elfobj *elf, char *fname)
706{
707 int fd = 0;
708 char *strs;
709 static char buf[__PAX_UTILS_PATH_MAX] = "";
710 const char *cachefile = "/etc/ld.so.cache";
711 struct stat st;
712
713 typedef struct {
714 char magic[LDSO_CACHE_MAGIC_LEN];
715 char version[LDSO_CACHE_VER_LEN];
716 int nlibs;
717 } header_t;
718 header_t *header;
719
720 typedef struct {
721 int flags;
722 int sooffset;
723 int liboffset;
724 } libentry_t;
725 libentry_t *libent;
726
727 if (fname == NULL)
728 return NULL;
729
730 if (ldcache == 0) {
731 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1)
732 return NULL;
733
734 /* cache these values so we only map/unmap the cache file once */
735 ldcache_size = st.st_size;
736 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
737
738 close(fd);
739
740 if (ldcache == (caddr_t)-1) {
741 ldcache = 0;
742 return NULL;
743 }
744
745 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN))
746 return NULL;
747 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
748 return NULL;
749 }
750
751 header = (header_t *) ldcache;
752 libent = (libentry_t *) (ldcache + sizeof(header_t));
753 strs = (char *) &libent[header->nlibs];
754
755 for (fd = 0; fd < header->nlibs; fd++) {
756 /* this should be more fine grained, but for now we assume that
757 * diff arches will not be cached together. and we ignore the
758 * the different multilib mips cases. */
759 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
760 continue;
761 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
762 continue;
763
764 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
765 continue;
766 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
767 }
768 return buf;
769}
770#elif defined(__NetBSD__)
771static char *lookup_cache_lib(elfobj *elf, char *fname)
772{
773 static char buf[__PAX_UTILS_PATH_MAX] = "";
774 static struct stat st;
775
776 char **ldpath;
777 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) {
778 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", *ldpath, fname) >= sizeof(buf))
779 continue; /* if the pathname is too long, or something went wrong, ignore */
780
781 if (stat(buf, &st) != 0)
782 continue; /* if the lib doesn't exist in *ldpath, look further */
783
784 /* NetBSD doesn't actually do sanity checks, it just loads the file
785 * and if that doesn't work, continues looking in other directories.
786 * This cannot easily be safely emulated, unfortunately. For now,
787 * just assume that if it exists, it's a valid library. */
788
789 return buf;
790 }
791
792 /* not found in any path */
793 return NULL;
794}
795#else
796#warning Cache support not implemented for your target
797static char *lookup_cache_lib(elfobj *elf, char *fname)
798{
799 return NULL;
800}
801#endif
802
450static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len) 803static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
451{ 804{
452 unsigned long i; 805 unsigned long i;
453 char *needed; 806 char *needed;
454 void *strtbl_void; 807 void *strtbl_void;
808 char *p;
455 809
456 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 810 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
457 811
458 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 812 strtbl_void = elf_findsecbyname(elf, ".dynstr");
459 813
479 } \ 833 } \
480 needed = (char*)(elf->data + offset); \ 834 needed = (char*)(elf->data + offset); \
481 if (op == 0) { \ 835 if (op == 0) { \
482 if (!be_wewy_wewy_quiet) { \ 836 if (!be_wewy_wewy_quiet) { \
483 if (*found_needed) xchrcat(ret, ',', ret_len); \ 837 if (*found_needed) xchrcat(ret, ',', ret_len); \
838 if (use_ldcache) \
839 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
840 needed = p; \
484 xstrcat(ret, needed, ret_len); \ 841 xstrcat(ret, needed, ret_len); \
485 } \ 842 } \
486 *found_needed = 1; \ 843 *found_needed = 1; \
487 } else { \ 844 } else { \
488 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \ 845 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \
489 *found_lib = 1; \ 846 *found_lib = 1; \
490 return (be_wewy_wewy_quiet ? NULL : needed); \ 847 return (be_wewy_wewy_quiet ? NULL : needed); \
491 } \ 848 } \
492 } \ 849 } \
493 } \ 850 } \
524} 881}
525static char *scanelf_file_bind(elfobj *elf, char *found_bind) 882static char *scanelf_file_bind(elfobj *elf, char *found_bind)
526{ 883{
527 unsigned long i; 884 unsigned long i;
528 struct stat s; 885 struct stat s;
886 char dynamic = 0;
529 887
530 if (!show_bind) return NULL; 888 if (!show_bind) return NULL;
531 if (!elf->phdr) return NULL; 889 if (!elf->phdr) return NULL;
532 890
533#define SHOW_BIND(B) \ 891#define SHOW_BIND(B) \
536 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 894 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
537 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 895 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
538 Elf ## B ## _Off offset; \ 896 Elf ## B ## _Off offset; \
539 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 897 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
540 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 898 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
899 dynamic = 1; \
541 offset = EGET(phdr[i].p_offset); \ 900 offset = EGET(phdr[i].p_offset); \
542 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 901 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
543 dyn = DYN ## B (elf->data + offset); \ 902 dyn = DYN ## B (elf->data + offset); \
544 while (EGET(dyn->d_tag) != DT_NULL) { \ 903 while (EGET(dyn->d_tag) != DT_NULL) { \
545 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 904 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
556 SHOW_BIND(32) 915 SHOW_BIND(32)
557 SHOW_BIND(64) 916 SHOW_BIND(64)
558 917
559 if (be_wewy_wewy_quiet) return NULL; 918 if (be_wewy_wewy_quiet) return NULL;
560 919
920 /* don't output anything if quiet mode and the ELF is static or not setuid */
561 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) { 921 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
562 return NULL; 922 return NULL;
563 } else { 923 } else {
564 *found_bind = 1; 924 *found_bind = 1;
565 return (char *) "LAZY"; 925 return (char *) (dynamic ? "LAZY" : "STATIC");
566 } 926 }
567} 927}
568static char *scanelf_file_soname(elfobj *elf, char *found_soname) 928static char *scanelf_file_soname(elfobj *elf, char *found_soname)
569{ 929{
570 unsigned long i; 930 unsigned long i;
609 SHOW_SONAME(64) 969 SHOW_SONAME(64)
610 } 970 }
611 971
612 return NULL; 972 return NULL;
613} 973}
974
614static char *scanelf_file_sym(elfobj *elf, char *found_sym) 975static char *scanelf_file_sym(elfobj *elf, char *found_sym)
615{ 976{
616 unsigned long i; 977 unsigned long i;
978 char *ret;
617 void *symtab_void, *strtab_void; 979 void *symtab_void, *strtab_void;
618 980
619 if (!find_sym) return NULL; 981 if (!find_sym) return NULL;
982 ret = find_sym;
620 983
621 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 984 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
622 985
623 if (symtab_void && strtab_void) { 986 if (symtab_void && strtab_void) {
624#define FIND_SYM(B) \ 987#define FIND_SYM(B) \
625 if (elf->elf_class == ELFCLASS ## B) { \ 988 if (elf->elf_class == ELFCLASS ## B) { \
626 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 989 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
627 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 990 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
628 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 991 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
629 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 992 unsigned long cnt = EGET(symtab->sh_entsize); \
630 char *symname; \ 993 char *symname; \
994 if (cnt) \
995 cnt = EGET(symtab->sh_size) / cnt; \
631 for (i = 0; i < cnt; ++i) { \ 996 for (i = 0; i < cnt; ++i) { \
632 if (sym->st_name) { \ 997 if (sym->st_name) { \
998 /* make sure the symbol name is in acceptable memory range */ \
633 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 999 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
634 if (*find_sym == '*') { \ 1000 if ((void*)symname > (void*)elf->data_end) { \
1001 warnf("%s: corrupt ELF symbols", elf->filename); \
1002 ++sym; \
1003 continue; \
1004 } \
1005 /* debug display ... show all symbols and some extra info */ \
1006 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \
635 printf("%s(%s) %5lX %15s %s\n", \ 1007 printf("%s(%s) %5lX %15s %s %s\n", \
636 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1008 ((*found_sym == 0) ? "\n\t" : "\t"), \
637 elf->base_filename, \ 1009 elf->base_filename, \
638 (long)sym->st_size, \ 1010 (unsigned long)sym->st_size, \
639 (char *)get_elfstttype(sym->st_info), \ 1011 get_elfstttype(sym->st_info), \
640 symname); \ 1012 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
641 *found_sym = 1; \ 1013 *found_sym = 1; \
642 } else if ((strcmp(find_sym, symname) == 0) || \ 1014 } else { \
643 (strcmp(symname, versioned_symname) == 0)) \ 1015 /* allow the user to specify a comma delimited list of symbols to search for */ \
1016 char *this_sym, *this_sym_ver, *next_sym; \
1017 this_sym = ret; \
1018 this_sym_ver = versioned_symname; \
1019 do { \
1020 next_sym = strchr(this_sym, ','); \
1021 if (next_sym == NULL) \
1022 next_sym = this_sym + strlen(this_sym); \
1023 /* do we want a defined symbol ? */ \
1024 if (*this_sym == '+') { \
1025 if (sym->st_shndx == SHN_UNDEF) \
1026 goto skip_this_sym##B; \
1027 ++this_sym; \
1028 ++this_sym_ver; \
1029 /* do we want an undefined symbol ? */ \
1030 } else if (*this_sym == '-') { \
1031 if (sym->st_shndx != SHN_UNDEF) \
1032 goto skip_this_sym##B; \
1033 ++this_sym; \
1034 ++this_sym_ver; \
1035 } \
1036 /* ok, lets compare the name now */ \
1037 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
1038 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
1039 if (be_semi_verbose) { \
1040 char buf[126]; \
1041 snprintf(buf, sizeof(buf), "%lX %s %s", \
1042 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1043 ret = buf; \
1044 } else \
1045 ret = this_sym; \
644 (*found_sym)++; \ 1046 (*found_sym)++; \
1047 goto break_out; \
1048 } \
1049 skip_this_sym##B: this_sym = next_sym + 1; \
1050 } while (*next_sym != '\0'); \
1051 } \
645 } \ 1052 } \
646 ++sym; \ 1053 ++sym; \
647 } } 1054 } }
648 FIND_SYM(32) 1055 FIND_SYM(32)
649 FIND_SYM(64) 1056 FIND_SYM(64)
650 } 1057 }
651 1058
1059break_out:
652 if (be_wewy_wewy_quiet) return NULL; 1060 if (be_wewy_wewy_quiet) return NULL;
653 1061
654 if (*find_sym != '*' && *found_sym) 1062 if (*find_sym != '*' && *found_sym)
655 return find_sym; 1063 return ret;
656 if (be_quiet) 1064 if (be_quiet)
657 return NULL; 1065 return NULL;
658 else 1066 else
659 return (char *)" - "; 1067 return (char *)" - ";
660} 1068}
1069
1070
1071static char *scanelf_file_sections(elfobj *elf, char *found_section)
1072{
1073 if (!find_section)
1074 return NULL;
1075
1076#define FIND_SECTION(B) \
1077 if (elf->elf_class == ELFCLASS ## B) { \
1078 int invert; \
1079 Elf ## B ## _Shdr *section; \
1080 invert = (*find_section == '!' ? 1 : 0); \
1081 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \
1082 if ((section == NULL && invert) || (section != NULL && !invert)) \
1083 *found_section = 1; \
1084 }
1085 FIND_SECTION(32)
1086 FIND_SECTION(64)
1087
1088 if (be_wewy_wewy_quiet)
1089 return NULL;
1090
1091 if (*found_section)
1092 return find_section;
1093
1094 if (be_quiet)
1095 return NULL;
1096 else
1097 return (char *)" - ";
1098}
1099
661/* scan an elf file and show all the fun stuff */ 1100/* scan an elf file and show all the fun stuff */
662#define prints(str) write(fileno(stdout), str, strlen(str)) 1101#define prints(str) write(fileno(stdout), str, strlen(str))
663static void scanelf_file(const char *filename) 1102static int scanelf_elfobj(elfobj *elf)
664{ 1103{
665 unsigned long i; 1104 unsigned long i;
666 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1105 char found_pax, found_phdr, found_relro, found_load, found_textrel,
667 found_rpath, found_needed, found_interp, found_bind, found_soname, 1106 found_rpath, found_needed, found_interp, found_bind, found_soname,
668 found_sym, found_lib, found_file, found_textrels; 1107 found_sym, found_lib, found_file, found_textrels, found_section;
669 elfobj *elf;
670 struct stat st;
671 static char *out_buffer = NULL; 1108 static char *out_buffer = NULL;
672 static size_t out_len; 1109 static size_t out_len;
673 1110
674 /* make sure 'filename' exists */
675 if (lstat(filename, &st) == -1) {
676 if (be_verbose > 2) printf("%s: does not exist\n", filename);
677 return;
678 }
679 /* always handle regular files and handle symlinked files if no -y */
680 if (S_ISLNK(st.st_mode)) {
681 if (!scan_symlink) return;
682 stat(filename, &st);
683 }
684 if (!S_ISREG(st.st_mode)) {
685 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
686 return;
687 }
688
689 found_pax = found_phdr = found_relro = found_load = found_textrel = \ 1111 found_pax = found_phdr = found_relro = found_load = found_textrel = \
690 found_rpath = found_needed = found_interp = found_bind = found_soname = \ 1112 found_rpath = found_needed = found_interp = found_bind = found_soname = \
691 found_sym = found_lib = found_file = found_textrels = 0; 1113 found_sym = found_lib = found_file = found_textrels = found_section = 0;
692 1114
693 /* verify this is real ELF */
694 if ((elf = readelf(filename)) == NULL) {
695 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
696 return;
697 }
698
699 if (be_verbose > 1) 1115 if (be_verbose > 2)
700 printf("%s: scanning file {%s,%s}\n", filename, 1116 printf("%s: scanning file {%s,%s}\n", elf->filename,
701 get_elfeitype(EI_CLASS, elf->elf_class), 1117 get_elfeitype(EI_CLASS, elf->elf_class),
702 get_elfeitype(EI_DATA, elf->data[EI_DATA])); 1118 get_elfeitype(EI_DATA, elf->data[EI_DATA]));
703 else if (be_verbose) 1119 else if (be_verbose > 1)
704 printf("%s: scanning file\n", filename); 1120 printf("%s: scanning file\n", elf->filename);
705 1121
706 /* init output buffer */ 1122 /* init output buffer */
707 if (!out_buffer) { 1123 if (!out_buffer) {
708 out_len = sizeof(char) * 80; 1124 out_len = sizeof(char) * 80;
709 out_buffer = (char*)xmalloc(out_len); 1125 out_buffer = (char*)xmalloc(out_len);
714 if (!be_quiet && show_banner) { 1130 if (!be_quiet && show_banner) {
715 for (i = 0; out_format[i]; ++i) { 1131 for (i = 0; out_format[i]; ++i) {
716 if (!IS_MODIFIER(out_format[i])) continue; 1132 if (!IS_MODIFIER(out_format[i])) continue;
717 1133
718 switch (out_format[++i]) { 1134 switch (out_format[++i]) {
1135 case '+': break;
719 case '%': break; 1136 case '%': break;
720 case '#': break; 1137 case '#': break;
721 case 'F': 1138 case 'F':
722 case 'p': 1139 case 'p':
723 case 'f': prints("FILE "); found_file = 1; break; 1140 case 'f': prints("FILE "); found_file = 1; break;
724 case 'o': prints(" TYPE "); break; 1141 case 'o': prints(" TYPE "); break;
725 case 'x': prints(" PAX "); break; 1142 case 'x': prints(" PAX "); break;
726 case 'e': prints("STK/REL/PTL "); break; 1143 case 'e': prints("STK/REL/PTL "); break;
727 case 't': prints("TEXTREL "); break; 1144 case 't': prints("TEXTREL "); break;
728 case 'r': prints("RPATH "); break; 1145 case 'r': prints("RPATH "); break;
1146 case 'M': prints("CLASS "); break;
729 case 'n': prints("NEEDED "); break; 1147 case 'n': prints("NEEDED "); break;
730 case 'i': prints("INTERP "); break; 1148 case 'i': prints("INTERP "); break;
731 case 'b': prints("BIND "); break; 1149 case 'b': prints("BIND "); break;
732 case 'S': prints("SONAME "); break; 1150 case 'S': prints("SONAME "); break;
733 case 's': prints("SYM "); break; 1151 case 's': prints("SYM "); break;
734 case 'N': prints("LIB "); break; 1152 case 'N': prints("LIB "); break;
735 case 'T': prints("TEXTRELS "); break; 1153 case 'T': prints("TEXTRELS "); break;
1154 case 'k': prints("SECTION "); break;
1155 case 'a': prints("ARCH "); break;
1156 case 'O': prints("PERM "); break;
1157 case 'D': prints("ENDIAN "); break;
736 default: warnf("'%c' has no title ?", out_format[i]); 1158 default: warnf("'%c' has no title ?", out_format[i]);
737 } 1159 }
738 } 1160 }
739 if (!found_file) prints("FILE "); 1161 if (!found_file) prints("FILE ");
740 prints("\n"); 1162 prints("\n");
745 /* dump all the good stuff */ 1167 /* dump all the good stuff */
746 for (i = 0; out_format[i]; ++i) { 1168 for (i = 0; out_format[i]; ++i) {
747 const char *out; 1169 const char *out;
748 const char *tmp; 1170 const char *tmp;
749 1171
750 /* make sure we trim leading spaces in quiet mode */
751 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
752 *out_buffer = '\0';
753
754 if (!IS_MODIFIER(out_format[i])) { 1172 if (!IS_MODIFIER(out_format[i])) {
755 xchrcat(&out_buffer, out_format[i], &out_len); 1173 xchrcat(&out_buffer, out_format[i], &out_len);
756 continue; 1174 continue;
757 } 1175 }
758 1176
759 out = NULL; 1177 out = NULL;
760 be_wewy_wewy_quiet = (out_format[i] == '#'); 1178 be_wewy_wewy_quiet = (out_format[i] == '#');
1179 be_semi_verbose = (out_format[i] == '+');
761 switch (out_format[++i]) { 1180 switch (out_format[++i]) {
1181 case '+':
762 case '%': 1182 case '%':
763 case '#': 1183 case '#':
764 xchrcat(&out_buffer, out_format[i], &out_len); break; 1184 xchrcat(&out_buffer, out_format[i], &out_len); break;
765 case 'F': 1185 case 'F':
766 found_file = 1; 1186 found_file = 1;
767 if (be_wewy_wewy_quiet) break; 1187 if (be_wewy_wewy_quiet) break;
768 xstrcat(&out_buffer, filename, &out_len); 1188 xstrcat(&out_buffer, elf->filename, &out_len);
769 break; 1189 break;
770 case 'p': 1190 case 'p':
771 found_file = 1; 1191 found_file = 1;
772 if (be_wewy_wewy_quiet) break; 1192 if (be_wewy_wewy_quiet) break;
773 tmp = filename; 1193 tmp = elf->filename;
774 if (search_path) { 1194 if (search_path) {
775 ssize_t len_search = strlen(search_path); 1195 ssize_t len_search = strlen(search_path);
776 ssize_t len_file = strlen(filename); 1196 ssize_t len_file = strlen(elf->filename);
777 if (!strncmp(filename, search_path, len_search) && \ 1197 if (!strncmp(elf->filename, search_path, len_search) && \
778 len_file > len_search) 1198 len_file > len_search)
779 tmp += len_search; 1199 tmp += len_search;
780 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++; 1200 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
781 } 1201 }
782 xstrcat(&out_buffer, tmp, &out_len); 1202 xstrcat(&out_buffer, tmp, &out_len);
783 break; 1203 break;
784 case 'f': 1204 case 'f':
785 found_file = 1; 1205 found_file = 1;
786 if (be_wewy_wewy_quiet) break; 1206 if (be_wewy_wewy_quiet) break;
787 tmp = strrchr(filename, '/'); 1207 tmp = strrchr(elf->filename, '/');
788 tmp = (tmp == NULL ? filename : tmp+1); 1208 tmp = (tmp == NULL ? elf->filename : tmp+1);
789 xstrcat(&out_buffer, tmp, &out_len); 1209 xstrcat(&out_buffer, tmp, &out_len);
790 break; 1210 break;
791 case 'o': out = get_elfetype(elf); break; 1211 case 'o': out = get_elfetype(elf); break;
792 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1212 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
793 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break; 1213 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
794 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1214 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
795 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break; 1215 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
796 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 1216 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1217 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1218 case 'D': out = get_endian(elf); break;
1219 case 'O': out = getstr_perms(elf->filename); break;
797 case 'n': 1220 case 'n':
798 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; 1221 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
799 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1222 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
800 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1223 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
801 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1224 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
802 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1225 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1226 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1227 case 'a': out = get_elfemtype(elf); break;
803 default: warnf("'%c' has no scan code?", out_format[i]); 1228 default: warnf("'%c' has no scan code?", out_format[i]);
804 } 1229 }
1230 if (out) {
1231 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1232 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1233 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1234 else
805 if (out) xstrcat(&out_buffer, out, &out_len); 1235 xstrcat(&out_buffer, out, &out_len);
1236 }
806 } 1237 }
807 1238
808#define FOUND_SOMETHING() \ 1239#define FOUND_SOMETHING() \
809 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1240 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
810 found_rpath || found_needed || found_interp || found_bind || \ 1241 found_rpath || found_needed || found_interp || found_bind || \
811 found_soname || found_sym || found_lib || found_textrels) 1242 found_soname || found_sym || found_lib || found_textrels || found_section )
812 1243
813 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { 1244 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
814 xchrcat(&out_buffer, ' ', &out_len); 1245 xchrcat(&out_buffer, ' ', &out_len);
815 xstrcat(&out_buffer, filename, &out_len); 1246 xstrcat(&out_buffer, elf->filename, &out_len);
816 } 1247 }
817 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) { 1248 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
818 puts(out_buffer); 1249 puts(out_buffer);
819 fflush(stdout); 1250 fflush(stdout);
820 } 1251 }
821 1252
1253 return 0;
1254}
1255
1256/* scan a single elf */
1257static int scanelf_elf(const char *filename, int fd, size_t len)
1258{
1259 int ret = 1;
1260 elfobj *elf;
1261
1262 /* verify this is real ELF */
1263 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1264 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1265 return ret;
1266 }
1267 switch (match_bits) {
1268 case 32:
1269 if (elf->elf_class != ELFCLASS32)
1270 goto label_done;
1271 break;
1272 case 64:
1273 if (elf->elf_class != ELFCLASS64)
1274 goto label_done;
1275 break;
1276 default: break;
1277 }
1278 if (strlen(match_etypes)) {
1279 char sbuf[126];
1280 strncpy(sbuf, match_etypes, sizeof(sbuf));
1281 if (strchr(match_etypes, ',') != NULL) {
1282 char *p;
1283 while((p = strrchr(sbuf, ',')) != NULL) {
1284 *p = 0;
1285 if (etype_lookup(p+1) == get_etype(elf))
1286 goto label_ret;
1287 }
1288 }
1289 if (etype_lookup(sbuf) != get_etype(elf))
1290 goto label_done;
1291 }
1292
1293label_ret:
1294 ret = scanelf_elfobj(elf);
1295
1296label_done:
822 unreadelf(elf); 1297 unreadelf(elf);
1298 return ret;
1299}
1300
1301/* scan an archive of elfs */
1302static int scanelf_archive(const char *filename, int fd, size_t len)
1303{
1304 archive_handle *ar;
1305 archive_member *m;
1306 char *ar_buffer;
1307 elfobj *elf;
1308
1309 ar = ar_open_fd(filename, fd);
1310 if (ar == NULL)
1311 return 1;
1312
1313 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1314 while ((m=ar_next(ar)) != NULL) {
1315 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1316 if (elf) {
1317 scanelf_elfobj(elf);
1318 unreadelf(elf);
1319 }
1320 }
1321 munmap(ar_buffer, len);
1322
1323 return 0;
1324}
1325/* scan a file which may be an elf or an archive or some other magical beast */
1326static int scanelf_file(const char *filename, const struct stat *st_cache)
1327{
1328 const struct stat *st = st_cache;
1329 struct stat symlink_st;
1330 int fd;
1331
1332 /* always handle regular files and handle symlinked files if no -y */
1333 if (S_ISLNK(st->st_mode)) {
1334 if (!scan_symlink) return 1;
1335 stat(filename, &symlink_st);
1336 st = &symlink_st;
1337 }
1338
1339 if (!S_ISREG(st->st_mode)) {
1340 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1341 return 1;
1342 }
1343
1344 if (match_perms) {
1345 if ((st->st_mode | match_perms) != st->st_mode)
1346 return 1;
1347 }
1348 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1349 return 1;
1350
1351 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1352 /* if it isn't an ELF, maybe it's an .a archive */
1353 scanelf_archive(filename, fd, st->st_size);
1354
1355 close(fd);
1356 return 0;
823} 1357}
824 1358
825/* scan a directory for ET_EXEC files and print when we find one */ 1359/* scan a directory for ET_EXEC files and print when we find one */
826static void scanelf_dir(const char *path) 1360static int scanelf_dir(const char *path)
827{ 1361{
828 register DIR *dir; 1362 register DIR *dir;
829 register struct dirent *dentry; 1363 register struct dirent *dentry;
830 struct stat st_top, st; 1364 struct stat st_top, st;
831 char buf[_POSIX_PATH_MAX]; 1365 char buf[__PAX_UTILS_PATH_MAX];
832 size_t pathlen = 0, len = 0; 1366 size_t pathlen = 0, len = 0;
1367 int ret = 0;
833 1368
834 /* make sure path exists */ 1369 /* make sure path exists */
835 if (lstat(path, &st_top) == -1) { 1370 if (lstat(path, &st_top) == -1) {
836 if (be_verbose > 2) printf("%s: does not exist\n", path); 1371 if (be_verbose > 2) printf("%s: does not exist\n", path);
837 return; 1372 return 1;
838 } 1373 }
839 1374
840 /* ok, if it isn't a directory, assume we can open it */ 1375 /* ok, if it isn't a directory, assume we can open it */
841 if (!S_ISDIR(st_top.st_mode)) { 1376 if (!S_ISDIR(st_top.st_mode)) {
842 scanelf_file(path); 1377 return scanelf_file(path, &st_top);
843 return;
844 } 1378 }
845 1379
846 /* now scan the dir looking for fun stuff */ 1380 /* now scan the dir looking for fun stuff */
847 if ((dir = opendir(path)) == NULL) { 1381 if ((dir = opendir(path)) == NULL) {
848 warnf("could not opendir %s: %s", path, strerror(errno)); 1382 warnf("could not opendir %s: %s", path, strerror(errno));
849 return; 1383 return 1;
850 } 1384 }
851 if (be_verbose) printf("%s: scanning dir\n", path); 1385 if (be_verbose > 1) printf("%s: scanning dir\n", path);
852 1386
853 pathlen = strlen(path); 1387 pathlen = strlen(path);
854 while ((dentry = readdir(dir))) { 1388 while ((dentry = readdir(dir))) {
855 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 1389 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
856 continue; 1390 continue;
858 if (len >= sizeof(buf)) { 1392 if (len >= sizeof(buf)) {
859 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, 1393 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
860 (unsigned long)len, (unsigned long)sizeof(buf)); 1394 (unsigned long)len, (unsigned long)sizeof(buf));
861 continue; 1395 continue;
862 } 1396 }
863 sprintf(buf, "%s/%s", path, dentry->d_name); 1397 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
864 if (lstat(buf, &st) != -1) { 1398 if (lstat(buf, &st) != -1) {
865 if (S_ISREG(st.st_mode)) 1399 if (S_ISREG(st.st_mode))
866 scanelf_file(buf); 1400 ret = scanelf_file(buf, &st);
867 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1401 else if (dir_recurse && S_ISDIR(st.st_mode)) {
868 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1402 if (dir_crossmount || (st_top.st_dev == st.st_dev))
869 scanelf_dir(buf); 1403 ret = scanelf_dir(buf);
870 } 1404 }
871 } 1405 }
872 } 1406 }
873 closedir(dir); 1407 closedir(dir);
1408 return ret;
874} 1409}
875 1410
876static int scanelf_from_file(char *filename) 1411static int scanelf_from_file(const char *filename)
877{ 1412{
878 FILE *fp = NULL; 1413 FILE *fp = NULL;
879 char *p; 1414 char *p;
880 char path[_POSIX_PATH_MAX]; 1415 char path[__PAX_UTILS_PATH_MAX];
1416 int ret = 0;
881 1417
882 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) 1418 if (strcmp(filename, "-") == 0)
883 fp = stdin; 1419 fp = stdin;
884 else if ((fp = fopen(filename, "r")) == NULL) 1420 else if ((fp = fopen(filename, "r")) == NULL)
885 return 1; 1421 return 1;
886 1422
887 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1423 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
888 if ((p = strchr(path, '\n')) != NULL) 1424 if ((p = strchr(path, '\n')) != NULL)
889 *p = 0; 1425 *p = 0;
890 search_path = path; 1426 search_path = path;
891 scanelf_dir(path); 1427 ret = scanelf_dir(path);
892 } 1428 }
893 if (fp != stdin) 1429 if (fp != stdin)
894 fclose(fp); 1430 fclose(fp);
895 return 0; 1431 return ret;
896} 1432}
897 1433
898static void load_ld_so_conf() 1434#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1435
1436static int load_ld_cache_config(int i, const char *fname)
899{ 1437{
900 FILE *fp = NULL; 1438 FILE *fp = NULL;
901 char *p; 1439 char *p;
902 char path[_POSIX_PATH_MAX]; 1440 char path[__PAX_UTILS_PATH_MAX];
903 int i = 0;
904 1441
905 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 1442 if (i + 1 == ARRAY_SIZE(ldpaths))
906 return; 1443 return i;
907 1444
1445 if ((fp = fopen(fname, "r")) == NULL)
1446 return i;
1447
908 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1448 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
909 if (*path != '/')
910 continue;
911
912 if ((p = strrchr(path, '\r')) != NULL) 1449 if ((p = strrchr(path, '\r')) != NULL)
913 *p = 0; 1450 *p = 0;
914 if ((p = strchr(path, '\n')) != NULL) 1451 if ((p = strchr(path, '\n')) != NULL)
915 *p = 0; 1452 *p = 0;
1453#ifdef __linux__
1454 // recursive includes of the same file will make this segfault.
1455 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1456 glob64_t gl;
1457 size_t x;
1458 char gpath[__PAX_UTILS_PATH_MAX];
1459
1460 memset(gpath, 0, sizeof(gpath));
1461
1462 if (path[8] != '/')
1463 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]);
1464 else
1465 strncpy(gpath, &path[8], sizeof(gpath));
1466
1467 if ((glob64(gpath, 0, NULL, &gl)) == 0) {
1468 for (x = 0; x < gl.gl_pathc; ++x) {
1469 /* try to avoid direct loops */
1470 if (strcmp(gl.gl_pathv[x], fname) == 0)
1471 continue;
1472 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1473 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1474 globfree64(&gl);
1475 return i;
1476 }
1477 }
1478 globfree64 (&gl);
1479 continue;
1480 }
1481 }
1482#endif
1483 if (*path != '/')
1484 continue;
916 1485
917 ldpaths[i++] = xstrdup(path); 1486 ldpaths[i++] = xstrdup(path);
918 1487
919 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1488 if (i + 1 == ARRAY_SIZE(ldpaths))
920 break; 1489 break;
921 } 1490 }
922 ldpaths[i] = NULL; 1491 ldpaths[i] = NULL;
923 1492
924 fclose(fp); 1493 fclose(fp);
1494 return i;
925} 1495}
1496
1497#elif defined(__FreeBSD__) || (__DragonFly__)
1498
1499static int load_ld_cache_config(int i, const char *fname)
1500{
1501 FILE *fp = NULL;
1502 char *b = NULL, *p;
1503 struct elfhints_hdr hdr;
1504
1505 if (i + 1 == ARRAY_SIZE(ldpaths))
1506 return i;
1507
1508 if ((fp = fopen(fname, "r")) == NULL)
1509 return i;
1510
1511 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1512 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1513 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1514 {
1515 fclose(fp);
1516 return i;
1517 }
1518
1519 b = (char*)malloc(hdr.dirlistlen+1);
1520 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1521 fclose(fp);
1522 free(b);
1523 return i;
1524 }
1525
1526 while ((p = strsep(&b, ":"))) {
1527 if (*p == '\0') continue;
1528 ldpaths[i++] = xstrdup(p);
1529
1530 if (i + 1 == ARRAY_SIZE(ldpaths))
1531 break;
1532 }
1533 ldpaths[i] = NULL;
1534
1535 free(b);
1536 fclose(fp);
1537 return i;
1538}
1539
1540#else
1541
1542#warning Cache config support not implemented for your target
1543static int load_ld_cache_config(int i, const char *fname)
1544{
1545 memset(ldpaths, 0x00, sizeof(ldpaths));
1546}
1547
1548#endif
926 1549
927/* scan /etc/ld.so.conf for paths */ 1550/* scan /etc/ld.so.conf for paths */
928static void scanelf_ldpath() 1551static void scanelf_ldpath(void)
929{ 1552{
930 char scan_l, scan_ul, scan_ull; 1553 char scan_l, scan_ul, scan_ull;
931 int i = 0; 1554 int i = 0;
932 1555
933 if (!ldpaths[0]) 1556 if (!ldpaths[0])
947 if (!scan_ul) scanelf_dir("/usr/lib"); 1570 if (!scan_ul) scanelf_dir("/usr/lib");
948 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1571 if (!scan_ull) scanelf_dir("/usr/local/lib");
949} 1572}
950 1573
951/* scan env PATH for paths */ 1574/* scan env PATH for paths */
952static void scanelf_envpath() 1575static void scanelf_envpath(void)
953{ 1576{
954 char *path, *p; 1577 char *path, *p;
955 1578
956 path = getenv("PATH"); 1579 path = getenv("PATH");
957 if (!path) 1580 if (!path)
965 1588
966 free(path); 1589 free(path);
967} 1590}
968 1591
969 1592
970 1593/* usage / invocation handling functions */ /* Free Flags: c d j u w C G H I J K P Q U W Y Z */
971/* usage / invocation handling functions */
972#define PARSE_FLAGS "plRmyxetrnibSs:gN:TaqvF:f:o:BhV" 1594#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DO:BhV"
973#define a_argument required_argument 1595#define a_argument required_argument
974static struct option const long_opts[] = { 1596static struct option const long_opts[] = {
975 {"path", no_argument, NULL, 'p'}, 1597 {"path", no_argument, NULL, 'p'},
976 {"ldpath", no_argument, NULL, 'l'}, 1598 {"ldpath", no_argument, NULL, 'l'},
977 {"recursive", no_argument, NULL, 'R'}, 1599 {"recursive", no_argument, NULL, 'R'},
978 {"mount", no_argument, NULL, 'm'}, 1600 {"mount", no_argument, NULL, 'm'},
979 {"symlink", no_argument, NULL, 'y'}, 1601 {"symlink", no_argument, NULL, 'y'},
1602 {"archives", no_argument, NULL, 'A'},
1603 {"ldcache", no_argument, NULL, 'L'},
1604 {"fix", no_argument, NULL, 'X'},
1605 {"setpax", a_argument, NULL, 'z'},
980 {"pax", no_argument, NULL, 'x'}, 1606 {"pax", no_argument, NULL, 'x'},
981 {"header", no_argument, NULL, 'e'}, 1607 {"header", no_argument, NULL, 'e'},
982 {"textrel", no_argument, NULL, 't'}, 1608 {"textrel", no_argument, NULL, 't'},
983 {"rpath", no_argument, NULL, 'r'}, 1609 {"rpath", no_argument, NULL, 'r'},
984 {"needed", no_argument, NULL, 'n'}, 1610 {"needed", no_argument, NULL, 'n'},
985 {"interp", no_argument, NULL, 'i'}, 1611 {"interp", no_argument, NULL, 'i'},
986 {"bind", no_argument, NULL, 'b'}, 1612 {"bind", no_argument, NULL, 'b'},
987 {"soname", no_argument, NULL, 'S'}, 1613 {"soname", no_argument, NULL, 'S'},
988 {"symbol", a_argument, NULL, 's'}, 1614 {"symbol", a_argument, NULL, 's'},
1615 {"section", a_argument, NULL, 'k'},
989 {"lib", a_argument, NULL, 'N'}, 1616 {"lib", a_argument, NULL, 'N'},
990 {"gmatch", no_argument, NULL, 'g'}, 1617 {"gmatch", no_argument, NULL, 'g'},
991 {"textrels", no_argument, NULL, 'T'}, 1618 {"textrels", no_argument, NULL, 'T'},
1619 {"etype", a_argument, NULL, 'E'},
1620 {"bits", a_argument, NULL, 'M'},
1621 {"endian", no_argument, NULL, 'D'},
1622 {"perms", a_argument, NULL, 'O'},
992 {"all", no_argument, NULL, 'a'}, 1623 {"all", no_argument, NULL, 'a'},
993 {"quiet", no_argument, NULL, 'q'}, 1624 {"quiet", no_argument, NULL, 'q'},
994 {"verbose", no_argument, NULL, 'v'}, 1625 {"verbose", no_argument, NULL, 'v'},
995 {"format", a_argument, NULL, 'F'}, 1626 {"format", a_argument, NULL, 'F'},
996 {"from", a_argument, NULL, 'f'}, 1627 {"from", a_argument, NULL, 'f'},
1004static const char *opts_help[] = { 1635static const char *opts_help[] = {
1005 "Scan all directories in PATH environment", 1636 "Scan all directories in PATH environment",
1006 "Scan all directories in /etc/ld.so.conf", 1637 "Scan all directories in /etc/ld.so.conf",
1007 "Scan directories recursively", 1638 "Scan directories recursively",
1008 "Don't recursively cross mount points", 1639 "Don't recursively cross mount points",
1009 "Don't scan symlinks\n", 1640 "Don't scan symlinks",
1641 "Scan archives (.a files)",
1642 "Utilize ld.so.cache information (use with -r/-n)",
1643 "Try and 'fix' bad things (use with -r/-e)",
1644 "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
1010 "Print PaX markings", 1645 "Print PaX markings",
1011 "Print GNU_STACK/PT_LOAD markings", 1646 "Print GNU_STACK/PT_LOAD markings",
1012 "Print TEXTREL information", 1647 "Print TEXTREL information",
1013 "Print RPATH information", 1648 "Print RPATH information",
1014 "Print NEEDED information", 1649 "Print NEEDED information",
1015 "Print INTERP information", 1650 "Print INTERP information",
1016 "Print BIND information", 1651 "Print BIND information",
1017 "Print SONAME information", 1652 "Print SONAME information",
1018 "Find a specified symbol", 1653 "Find a specified symbol",
1654 "Find a specified section",
1019 "Find a specified library", 1655 "Find a specified library",
1020 "Use strncmp to match libraries. (use with -N)", 1656 "Use strncmp to match libraries. (use with -N)",
1021 "Locate cause of TEXTREL", 1657 "Locate cause of TEXTREL",
1658 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1659 "Print only ELF files matching numeric bits",
1660 "Print Endianness",
1661 "Print only ELF files matching octal permissions",
1022 "Print all scanned info (-x -e -t -r -b)\n", 1662 "Print all scanned info (-x -e -t -r -b)\n",
1023 "Only output 'bad' things", 1663 "Only output 'bad' things",
1024 "Be verbose (can be specified more than once)", 1664 "Be verbose (can be specified more than once)",
1025 "Use specified format for output", 1665 "Use specified format for output",
1026 "Read input stream from a filename", 1666 "Read input stream from a filename",
1034/* display usage and exit */ 1674/* display usage and exit */
1035static void usage(int status) 1675static void usage(int status)
1036{ 1676{
1037 unsigned long i; 1677 unsigned long i;
1038 printf("* Scan ELF binaries for stuff\n\n" 1678 printf("* Scan ELF binaries for stuff\n\n"
1039 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 1679 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1040 printf("Options: -[%s]\n", PARSE_FLAGS); 1680 printf("Options: -[%s]\n", PARSE_FLAGS);
1041 for (i = 0; long_opts[i].name; ++i) 1681 for (i = 0; long_opts[i].name; ++i)
1042 if (long_opts[i].has_arg == no_argument) 1682 if (long_opts[i].has_arg == no_argument)
1043 printf(" -%c, --%-13s* %s\n", long_opts[i].val, 1683 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1044 long_opts[i].name, opts_help[i]); 1684 long_opts[i].name, opts_help[i]);
1045 else 1685 else
1046 printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val, 1686 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1047 long_opts[i].name, opts_help[i]); 1687 long_opts[i].name, opts_help[i]);
1048 1688
1049 if (status != EXIT_SUCCESS) 1689 puts("\nFor more information, see the scanelf(1) manpage");
1050 exit(status);
1051
1052 puts("\nThe format modifiers for the -F option are:");
1053 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1054 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1055 puts(" i INTERP \tb BIND \ts symbol");
1056 puts(" N library \to Type \tT TEXTRELs");
1057 puts(" S SONAME");
1058 puts(" p filename (with search path removed)");
1059 puts(" f filename (short name/basename)");
1060 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1061
1062 exit(status); 1690 exit(status);
1063} 1691}
1064 1692
1065/* parse command line arguments and preform needed actions */ 1693/* parse command line arguments and preform needed actions */
1694#define do_pax_state(option, flag) \
1695 if (islower(option)) { \
1696 flags &= ~PF_##flag; \
1697 flags |= PF_NO##flag; \
1698 } else { \
1699 flags &= ~PF_NO##flag; \
1700 flags |= PF_##flag; \
1701 }
1066static void parseargs(int argc, char *argv[]) 1702static int parseargs(int argc, char *argv[])
1067{ 1703{
1068 int i; 1704 int i;
1069 char *from_file = NULL; 1705 const char *from_file = NULL;
1706 int ret = 0;
1070 1707
1071 opterr = 0; 1708 opterr = 0;
1072 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 1709 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1073 switch (i) { 1710 switch (i) {
1074 1711
1078 VERSION, __FILE__, __DATE__, rcsid, argv0); 1715 VERSION, __FILE__, __DATE__, rcsid, argv0);
1079 exit(EXIT_SUCCESS); 1716 exit(EXIT_SUCCESS);
1080 break; 1717 break;
1081 case 'h': usage(EXIT_SUCCESS); break; 1718 case 'h': usage(EXIT_SUCCESS); break;
1082 case 'f': 1719 case 'f':
1083 if (from_file) err("Don't specify -f twice"); 1720 if (from_file) warn("You prob don't want to specify -f twice");
1084 from_file = xstrdup(optarg); 1721 from_file = optarg;
1722 break;
1723 case 'E':
1724 strncpy(match_etypes, optarg, sizeof(match_etypes));
1725 break;
1726 case 'M':
1727 match_bits = atoi(optarg);
1728 if (match_bits == 0) {
1729 if (strcmp(optarg, "ELFCLASS32") == 0)
1730 match_bits = 32;
1731 if (strcmp(optarg, "ELFCLASS64") == 0)
1732 match_bits = 64;
1733 }
1734 break;
1735 case 'O':
1736 if (sscanf(optarg, "%o", &match_perms) == (-1))
1737 match_bits = 0;
1085 break; 1738 break;
1086 case 'o': { 1739 case 'o': {
1087 FILE *fp = NULL;
1088 if ((fp = freopen(optarg, "w", stdout)) == NULL) 1740 if (freopen(optarg, "w", stdout) == NULL)
1089 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1741 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1090 SET_STDOUT(fp);
1091 break; 1742 break;
1092 } 1743 }
1093 1744 case 'k':
1745 if (find_section) warn("You prob don't want to specify -k twice");
1746 find_section = optarg;
1747 break;
1094 case 's': { 1748 case 's': {
1095 size_t len;
1096 if (find_sym) err("Don't specify -s twice"); 1749 if (find_sym) warn("You prob don't want to specify -s twice");
1097 find_sym = xstrdup(optarg); 1750 find_sym = optarg;
1098 len = strlen(find_sym) + 1;
1099 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1)); 1751 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1100 sprintf(versioned_symname, "%s@", find_sym); 1752 sprintf(versioned_symname, "%s@", find_sym);
1101 break; 1753 break;
1102 } 1754 }
1103 case 'N': { 1755 case 'N': {
1104 if (find_lib) err("Don't specify -N twice"); 1756 if (find_lib) warn("You prob don't want to specify -N twice");
1105 find_lib = xstrdup(optarg); 1757 find_lib = optarg;
1106 break; 1758 break;
1107 } 1759 }
1108 1760
1109 case 'F': { 1761 case 'F': {
1110 if (out_format) err("Don't specify -F twice"); 1762 if (out_format) warn("You prob don't want to specify -F twice");
1111 out_format = xstrdup(optarg); 1763 out_format = optarg;
1764 break;
1765 }
1766 case 'z': {
1767 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1768 size_t x;
1769
1770 for (x = 0 ; x < strlen(optarg); x++) {
1771 switch(optarg[x]) {
1772 case 'p':
1773 case 'P':
1774 do_pax_state(optarg[x], PAGEEXEC);
1112 break; 1775 break;
1776 case 's':
1777 case 'S':
1778 do_pax_state(optarg[x], SEGMEXEC);
1779 break;
1780 case 'm':
1781 case 'M':
1782 do_pax_state(optarg[x], MPROTECT);
1783 break;
1784 case 'e':
1785 case 'E':
1786 do_pax_state(optarg[x], EMUTRAMP);
1787 break;
1788 case 'r':
1789 case 'R':
1790 do_pax_state(optarg[x], RANDMMAP);
1791 break;
1792 case 'x':
1793 case 'X':
1794 do_pax_state(optarg[x], RANDEXEC);
1795 break;
1796 default:
1797 break;
1798 }
1113 } 1799 }
1114 1800 if (!(((flags & PF_PAGEEXEC) && (flags & PF_NOPAGEEXEC)) ||
1801 ((flags & PF_SEGMEXEC) && (flags & PF_NOSEGMEXEC)) ||
1802 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)) ||
1803 ((flags & PF_RANDEXEC) && (flags & PF_NORANDEXEC)) ||
1804 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1805 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1806 setpax = flags;
1807 break;
1808 }
1115 case 'g': gmatch = 1; 1809 case 'g': g_match = 1; break;
1810 case 'L': use_ldcache = 1; break;
1116 case 'y': scan_symlink = 0; break; 1811 case 'y': scan_symlink = 0; break;
1812 case 'A': scan_archives = 1; break;
1117 case 'B': show_banner = 0; break; 1813 case 'B': show_banner = 0; break;
1118 case 'l': scan_ldpath = 1; break; 1814 case 'l': scan_ldpath = 1; break;
1119 case 'p': scan_envpath = 1; break; 1815 case 'p': scan_envpath = 1; break;
1120 case 'R': dir_recurse = 1; break; 1816 case 'R': dir_recurse = 1; break;
1121 case 'm': dir_crossmount = 0; break; 1817 case 'm': dir_crossmount = 0; break;
1818 case 'X': ++fix_elf; break;
1122 case 'x': show_pax = 1; break; 1819 case 'x': show_pax = 1; break;
1123 case 'e': show_phdr = 1; break; 1820 case 'e': show_phdr = 1; break;
1124 case 't': show_textrel = 1; break; 1821 case 't': show_textrel = 1; break;
1125 case 'r': show_rpath = 1; break; 1822 case 'r': show_rpath = 1; break;
1126 case 'n': show_needed = 1; break; 1823 case 'n': show_needed = 1; break;
1128 case 'b': show_bind = 1; break; 1825 case 'b': show_bind = 1; break;
1129 case 'S': show_soname = 1; break; 1826 case 'S': show_soname = 1; break;
1130 case 'T': show_textrels = 1; break; 1827 case 'T': show_textrels = 1; break;
1131 case 'q': be_quiet = 1; break; 1828 case 'q': be_quiet = 1; break;
1132 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1829 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1133 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break; 1830 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1134 1831 case 'D': show_endian = 1; break;
1135 case ':': 1832 case ':':
1136 err("Option missing parameter\n"); 1833 err("Option '%c' is missing parameter", optopt);
1137 case '?': 1834 case '?':
1138 err("Unknown option\n"); 1835 err("Unknown option '%c' or argument missing", optopt);
1139 default: 1836 default:
1140 err("Unhandled option '%c'", i); 1837 err("Unhandled option '%c'; please report this", i);
1141 }
1142 } 1838 }
1143 1839 }
1840 if (show_textrels && be_verbose) {
1841 if (which("objdump") != NULL)
1842 has_objdump = 1;
1843 }
1144 /* let the format option override all other options */ 1844 /* let the format option override all other options */
1145 if (out_format) { 1845 if (out_format) {
1146 show_pax = show_phdr = show_textrel = show_rpath = \ 1846 show_pax = show_phdr = show_textrel = show_rpath = \
1147 show_needed = show_interp = show_bind = show_soname = \ 1847 show_needed = show_interp = show_bind = show_soname = \
1148 show_textrels = 0; 1848 show_textrels = show_perms = show_endian = 0;
1149 for (i = 0; out_format[i]; ++i) { 1849 for (i = 0; out_format[i]; ++i) {
1150 if (!IS_MODIFIER(out_format[i])) continue; 1850 if (!IS_MODIFIER(out_format[i])) continue;
1151 1851
1152 switch (out_format[++i]) { 1852 switch (out_format[++i]) {
1853 case '+': break;
1153 case '%': break; 1854 case '%': break;
1154 case '#': break; 1855 case '#': break;
1155 case 'F': break; 1856 case 'F': break;
1156 case 'p': break; 1857 case 'p': break;
1157 case 'f': break; 1858 case 'f': break;
1859 case 'k': break;
1158 case 's': break; 1860 case 's': break;
1159 case 'N': break; 1861 case 'N': break;
1160 case 'o': break; 1862 case 'o': break;
1863 case 'a': break;
1864 case 'M': break;
1865 case 'D': show_endian = 1; break;
1866 case 'O': show_perms = 1; break;
1161 case 'x': show_pax = 1; break; 1867 case 'x': show_pax = 1; break;
1162 case 'e': show_phdr = 1; break; 1868 case 'e': show_phdr = 1; break;
1163 case 't': show_textrel = 1; break; 1869 case 't': show_textrel = 1; break;
1164 case 'r': show_rpath = 1; break; 1870 case 'r': show_rpath = 1; break;
1165 case 'n': show_needed = 1; break; 1871 case 'n': show_needed = 1; break;
1166 case 'i': show_interp = 1; break; 1872 case 'i': show_interp = 1; break;
1167 case 'b': show_bind = 1; break; 1873 case 'b': show_bind = 1; break;
1168 case 'S': show_soname = 1; break; 1874 case 'S': show_soname = 1; break;
1169 case 'T': show_textrels = 1; break; 1875 case 'T': show_textrels = 1; break;
1170 default: 1876 default:
1171 err("Invalid format specifier '%c' (byte %i)", 1877 err("Invalid format specifier '%c' (byte %i)",
1172 out_format[i], i+1); 1878 out_format[i], i+1);
1173 } 1879 }
1174 } 1880 }
1175 1881
1176 /* construct our default format */ 1882 /* construct our default format */
1177 } else { 1883 } else {
1178 size_t fmt_len = 30; 1884 size_t fmt_len = 30;
1179 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 1885 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
1180 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 1886 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1181 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 1887 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1888 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
1889 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
1182 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 1890 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1183 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 1891 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1184 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 1892 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1185 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 1893 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1186 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 1894 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1187 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len); 1895 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1188 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len); 1896 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1189 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len); 1897 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
1190 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len); 1898 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1899 if (find_section) xstrcat(&out_format, "%k ", &fmt_len);
1191 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len); 1900 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
1192 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 1901 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1193 } 1902 }
1194 if (be_verbose > 2) printf("Format: %s\n", out_format); 1903 if (be_verbose > 2) printf("Format: %s\n", out_format);
1195 1904
1196 /* now lets actually do the scanning */ 1905 /* now lets actually do the scanning */
1197 if (scan_ldpath || (show_rpath && be_quiet)) 1906 if (scan_ldpath || use_ldcache)
1198 load_ld_so_conf(); 1907 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1199 if (scan_ldpath) scanelf_ldpath(); 1908 if (scan_ldpath) scanelf_ldpath();
1200 if (scan_envpath) scanelf_envpath(); 1909 if (scan_envpath) scanelf_envpath();
1910 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1911 from_file = "-";
1201 if (from_file) { 1912 if (from_file) {
1202 scanelf_from_file(from_file); 1913 scanelf_from_file(from_file);
1203 free(from_file);
1204 from_file = *argv; 1914 from_file = *argv;
1205 } 1915 }
1206 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1916 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1207 err("Nothing to scan !?"); 1917 err("Nothing to scan !?");
1208 while (optind < argc) { 1918 while (optind < argc) {
1209 search_path = argv[optind++]; 1919 search_path = argv[optind++];
1210 scanelf_dir(search_path); 1920 ret = scanelf_dir(search_path);
1211 } 1921 }
1212 1922
1213 /* clean up */ 1923 /* clean up */
1214 if (find_sym) {
1215 free(find_sym);
1216 free(versioned_symname); 1924 free(versioned_symname);
1217 }
1218 if (find_lib) free(find_lib);
1219 if (out_format) free(out_format);
1220 for (i = 0; ldpaths[i]; ++i) 1925 for (i = 0; ldpaths[i]; ++i)
1221 free(ldpaths[i]); 1926 free(ldpaths[i]);
1927
1928 if (ldcache != 0)
1929 munmap(ldcache, ldcache_size);
1930 return ret;
1931}
1932
1933static char **get_split_env(const char *envvar)
1934{
1935 const char *delims = " \t\n";
1936 char **envvals = NULL;
1937 char *env, *s;
1938 int nentry;
1939
1940 if ((env = getenv(envvar)) == NULL)
1941 return NULL;
1942
1943 env = xstrdup(env);
1944 if (env == NULL)
1945 return NULL;
1946
1947 s = strtok(env, delims);
1948 if (s == NULL) {
1949 free(env);
1950 return NULL;
1951 }
1952
1953 nentry = 0;
1954 while (s != NULL) {
1955 ++nentry;
1956 envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
1957 envvals[nentry-1] = s;
1958 s = strtok(NULL, delims);
1959 }
1960 envvals[nentry] = NULL;
1961
1962 /* don't want to free(env) as it contains the memory that backs
1963 * the envvals array of strings */
1964 return envvals;
1965}
1966
1967static void parseenv(void)
1968{
1969 qa_textrels = get_split_env("QA_TEXTRELS");
1970 qa_execstack = get_split_env("QA_EXECSTACK");
1971 qa_wx_load = get_split_env("QA_WX_LOAD");
1972}
1973
1974#ifdef __PAX_UTILS_CLEANUP
1975static void cleanup(void)
1976{
1977 free(out_format);
1978 free(qa_textrels);
1979 free(qa_execstack);
1980 free(qa_wx_load);
1981}
1982#endif
1983
1984
1985int main(int argc, char *argv[])
1986{
1987 int ret;
1988 if (argc < 2)
1989 usage(EXIT_FAILURE);
1990 parseenv();
1991 ret = parseargs(argc, argv);
1992 fclose(stdout);
1993#ifdef __PAX_UTILS_CLEANUP
1994 cleanup();
1995 warn("The calls to add/delete heap should be off:\n"
1996 "\t- 1 due to the out_buffer not being freed in scanelf_file()\n"
1997 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1998#endif
1999 return ret;
1222} 2000}
1223 2001
1224 2002
1225 2003
1226/* utility funcs */ 2004/* utility funcs */
1228{ 2006{
1229 char *ret = strdup(s); 2007 char *ret = strdup(s);
1230 if (!ret) err("Could not strdup(): %s", strerror(errno)); 2008 if (!ret) err("Could not strdup(): %s", strerror(errno));
1231 return ret; 2009 return ret;
1232} 2010}
1233
1234static void *xmalloc(size_t size) 2011static void *xmalloc(size_t size)
1235{ 2012{
1236 void *ret = malloc(size); 2013 void *ret = malloc(size);
1237 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size); 2014 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1238 return ret; 2015 return ret;
1239} 2016}
1240 2017static void *xrealloc(void *ptr, size_t size)
2018{
2019 void *ret = realloc(ptr, size);
2020 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
2021 return ret;
2022}
1241static void xstrcat(char **dst, const char *src, size_t *curr_len) 2023static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1242{ 2024{
1243 size_t new_len; 2025 size_t new_len;
1244 2026
1245 new_len = strlen(*dst) + strlen(src); 2027 new_len = strlen(*dst) + strlen(src);
1246 if (*curr_len <= new_len) { 2028 if (*curr_len <= new_len) {
1247 *curr_len = new_len + (*curr_len / 2); 2029 *curr_len = new_len + (*curr_len / 2);
1248 *dst = realloc(*dst, *curr_len); 2030 *dst = realloc(*dst, *curr_len);
1249 if (!*dst) 2031 if (!*dst)
1250 err("could not realloc %li bytes", (unsigned long)*curr_len); 2032 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1251 } 2033 }
1252 2034
2035 if (n)
2036 strncat(*dst, src, n);
2037 else
1253 strcat(*dst, src); 2038 strcat(*dst, src);
1254} 2039}
1255
1256static inline void xchrcat(char **dst, const char append, size_t *curr_len) 2040static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1257{ 2041{
1258 static char my_app[2]; 2042 static char my_app[2];
1259 my_app[0] = append; 2043 my_app[0] = append;
1260 my_app[1] = '\0'; 2044 my_app[1] = '\0';
1261 xstrcat(dst, my_app, curr_len); 2045 xstrcat(dst, my_app, curr_len);
1262} 2046}
1263 2047
1264 2048/* Match filename against entries in matchlist, return TRUE
1265 2049 * if the file is listed */
1266int main(int argc, char *argv[]) 2050static int file_matches_list(const char *filename, char **matchlist)
1267{ 2051{
1268 if (argc < 2) 2052 char **file;
1269 usage(EXIT_FAILURE); 2053 char *match;
1270 parseargs(argc, argv); 2054 char buf[__PAX_UTILS_PATH_MAX];
1271 fclose(stdout); 2055
1272#ifdef __BOUNDS_CHECKING_ON 2056 if (matchlist == NULL)
1273 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()"); 2057 return 0;
1274#endif 2058
1275 return EXIT_SUCCESS; 2059 for (file = matchlist; *file != NULL; file++) {
2060 if (search_path) {
2061 snprintf(buf, sizeof(buf), "%s%s", search_path, *file);
2062 match = buf;
2063 } else {
2064 match = *file;
2065 }
2066 if (fnmatch(match, filename, 0) == 0)
2067 return 1;
2068 }
2069 return 0;
1276} 2070}

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