/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.63 Revision 1.146
1/* 1/*
2 * Copyright 2003-2005 Gentoo Foundation 2 * Copyright 2003-2006 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 1.63 2005/05/29 18:44:48 solar Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.146 2006/05/14 21:04:25 vapier Exp $
5 * 5 *
6 ******************************************************************** 6 * Copyright 2003-2006 Ned Ludd - <solar@gentoo.org>
7 * This program is free software; you can redistribute it and/or 7 * Copyright 2004-2006 Mike Frysinger - <vapier@gentoo.org>
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of the
10 * License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
20 * MA 02111-1307, USA.
21 */ 8 */
22 9
23#include <stdio.h>
24#include <stdlib.h>
25#include <sys/types.h>
26#include <libgen.h>
27#include <limits.h>
28#define __USE_GNU
29#include <string.h>
30#include <errno.h>
31#include <unistd.h>
32#include <sys/stat.h>
33#include <dirent.h>
34#include <getopt.h>
35#include <assert.h>
36#include "paxelf.h" 10#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
37 17
38static const char *rcsid = "$Id: scanelf.c,v 1.63 2005/05/29 18:44:48 solar Exp $"; 18static const char *rcsid = "$Id: scanelf.c,v 1.146 2006/05/14 21:04:25 vapier Exp $";
39#define argv0 "scanelf" 19#define argv0 "scanelf"
40 20
21#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 }
41 31
42 32
43/* prototypes */ 33/* prototypes */
34static 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);
44static void scanelf_file(const char *filename); 38static void scanelf_file(const char *filename);
45static void scanelf_dir(const char *path); 39static void scanelf_dir(const char *path);
46static void scanelf_ldpath(); 40static void scanelf_ldpath(void);
47static void scanelf_envpath(); 41static void scanelf_envpath(void);
48static void usage(int status); 42static void usage(int status);
43static char **get_split_env(const char *envvar);
44static void parseenv(void);
49static void parseargs(int argc, char *argv[]); 45static void parseargs(int argc, char *argv[]);
50static char *xstrdup(const char *s); 46static char *xstrdup(const char *s);
51static void *xmalloc(size_t size); 47static void *xmalloc(size_t size);
48static void *xrealloc(void *ptr, size_t size);
52static void xstrcat(char **dst, const char *src, size_t *curr_len); 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)
53static inline void xchrcat(char **dst, const char append, size_t *curr_len); 51static inline void xchrcat(char **dst, const char append, size_t *curr_len);
54 52
55/* variables to control behavior */ 53/* variables to control behavior */
54static char match_etypes[126] = "";
56static char *ldpaths[256]; 55static char *ldpaths[256];
57static char scan_ldpath = 0; 56static char scan_ldpath = 0;
58static char scan_envpath = 0; 57static char scan_envpath = 0;
59static char scan_symlink = 1; 58static char scan_symlink = 1;
59static char scan_archives = 0;
60static char dir_recurse = 0; 60static char dir_recurse = 0;
61static char dir_crossmount = 1; 61static char dir_crossmount = 1;
62static char show_pax = 0; 62static char show_pax = 0;
63static char show_stack = 0; 63static char show_phdr = 0;
64static char show_textrel = 0; 64static char show_textrel = 0;
65static char show_rpath = 0; 65static char show_rpath = 0;
66static char show_needed = 0; 66static char show_needed = 0;
67static char show_interp = 0; 67static char show_interp = 0;
68static char show_bind = 0; 68static char show_bind = 0;
69static char show_soname = 0;
70static char show_textrels = 0;
69static char show_banner = 1; 71static char show_banner = 1;
70static char be_quiet = 0; 72static char be_quiet = 0;
71static char be_verbose = 0; 73static char be_verbose = 0;
74static char be_wewy_wewy_quiet = 0;
75static char be_semi_verbose = 0;
72static char *find_sym = NULL, *versioned_symname = NULL; 76static char *find_sym = NULL, *versioned_symname = NULL;
77static char *find_lib = NULL;
78static char *find_section = NULL;
73static char *out_format = NULL; 79static char *out_format = NULL;
80static char *search_path = NULL;
81static char fix_elf = 0;
82static char gmatch = 0;
83static char use_ldcache = 0;
74 84
85static char **qa_textrels = NULL;
86static char **qa_execstack = NULL;
87static char **qa_wx_load = NULL;
88
89int match_bits = 0;
90caddr_t ldcache = 0;
91size_t ldcache_size = 0;
92unsigned long setpax = 0UL;
93
94/* utility funcs */
95static char *xstrdup(const char *s)
96{
97 char *ret = strdup(s);
98 if (!ret) err("Could not strdup(): %s", strerror(errno));
99 return ret;
100}
101static void *xmalloc(size_t size)
102{
103 void *ret = malloc(size);
104 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
105 return ret;
106}
107static void *xrealloc(void *ptr, size_t size)
108{
109 void *ret = realloc(ptr, size);
110 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
111 return ret;
112}
113static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
114{
115 size_t new_len;
116
117 new_len = strlen(*dst) + strlen(src);
118 if (*curr_len <= new_len) {
119 *curr_len = new_len + (*curr_len / 2);
120 *dst = realloc(*dst, *curr_len);
121 if (!*dst)
122 err("could not realloc() %li bytes", (unsigned long)*curr_len);
123 }
124
125 if (n)
126 strncat(*dst, src, n);
127 else
128 strcat(*dst, src);
129}
130static inline void xchrcat(char **dst, const char append, size_t *curr_len)
131{
132 static char my_app[2];
133 my_app[0] = append;
134 my_app[1] = '\0';
135 xstrcat(dst, my_app, curr_len);
136}
137
138/* Match filename against entries in matchlist, return TRUE
139 * if the file is listed */
140static int file_matches_list(const char *filename, char **matchlist) {
141 char **file;
142 char *match;
143 char buf[__PAX_UTILS_PATH_MAX];
144
145 if (matchlist == NULL)
146 return 0;
147
148 for (file = matchlist; *file != NULL; file++) {
149 if (search_path) {
150 snprintf(buf,__PAX_UTILS_PATH_MAX, "%s%s", search_path, *file);
151 match=buf;
152 } else {
153 match=*file;
154 }
155 if (fnmatch(match, filename, 0) == 0)
156 return 1; /* TRUE */
157 }
158 return 0; /* FALSE */
159}
75 160
76/* sub-funcs for scanelf_file() */ 161/* sub-funcs for scanelf_file() */
162static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
163{
164 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
165#define GET_SYMTABS(B) \
166 if (elf->elf_class == ELFCLASS ## B) { \
167 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
168 /* debug sections */ \
169 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
170 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
171 /* runtime sections */ \
172 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
173 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
174 if (symtab && dynsym) { \
175 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \
176 } else { \
177 *sym = (void*)(symtab ? symtab : dynsym); \
178 } \
179 if (strtab && dynstr) { \
180 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \
181 } else { \
182 *tab = (void*)(strtab ? strtab : dynstr); \
183 } \
184 }
185 GET_SYMTABS(32)
186 GET_SYMTABS(64)
187}
188
77static char *scanelf_file_pax(elfobj *elf, char *found_pax) 189static char *scanelf_file_pax(elfobj *elf, char *found_pax)
78{ 190{
79 static char *paxflags;
80 static char ret[7]; 191 static char ret[7];
81 unsigned long i, shown; 192 unsigned long i, shown;
82
83 193
84 if (!show_pax) return NULL; 194 if (!show_pax) return NULL;
85 195
86 shown = 0; 196 shown = 0;
87 memset(&ret, 0, sizeof(ret)); 197 memset(&ret, 0, sizeof(ret));
92 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 202 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
93 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 203 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
94 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 204 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
95 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \ 205 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \
96 continue; \ 206 continue; \
97 if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \ 207 if (fix_elf && setpax) { \
208 /* set the paxctl flags */ \
209 ESET(phdr[i].p_flags, setpax); \
210 } \
211 if (be_quiet && (EGET(phdr[i].p_flags) == (PF_NOEMUTRAMP | PF_NORANDEXEC))) \
98 continue; \ 212 continue; \
99 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \ 213 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \
100 *found_pax = 1; \ 214 *found_pax = 1; \
101 ++shown; \ 215 ++shown; \
102 break; \ 216 break; \
104 } 218 }
105 SHOW_PAX(32) 219 SHOW_PAX(32)
106 SHOW_PAX(64) 220 SHOW_PAX(64)
107 } 221 }
108 222
223
224 if (fix_elf && setpax) {
225 /* set the chpax settings */
226 if (elf->elf_class == ELFCLASS32) {
227 if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC)
228 ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
229 } else {
230 if (EHDR64(elf->ehdr)->e_type == ET_DYN || EHDR64(elf->ehdr)->e_type == ET_EXEC)
231 ESET(EHDR64(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
232 }
233 }
234
109 /* fall back to EI_PAX if no PT_PAX was found */ 235 /* fall back to EI_PAX if no PT_PAX was found */
110 if (!*ret) { 236 if (!*ret) {
237 static char *paxflags;
111 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); 238 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
112 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) { 239 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
113 *found_pax = 1; 240 *found_pax = 1;
114 return paxflags; 241 return (be_wewy_wewy_quiet ? NULL : paxflags);
115 } 242 }
116 strncpy(ret, paxflags, sizeof(ret)); 243 strncpy(ret, paxflags, sizeof(ret));
117 // ++shown;
118 } 244 }
119 245
120 if (be_quiet && !shown) 246 if (be_wewy_wewy_quiet || (be_quiet && !shown))
121 return NULL;
122 return ret;
123
124}
125static char *scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro)
126{
127 static char ret[8] = "--- ---";
128 char *found;
129 unsigned long i, off, shown;
130
131 if (!show_stack) return NULL;
132
133 shown = 0;
134
135 if (elf->phdr) {
136#define SHOW_STACK(B) \
137 if (elf->elf_class == ELFCLASS ## B) { \
138 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
139 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
140 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
141 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
142 found = found_stack; \
143 off = 0; \
144 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
145 found = found_relro; \
146 off = 4; \
147 } else \
148 continue; \
149 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \
150 continue; \
151 memcpy(ret+off, gnu_short_stack_flags(EGET(phdr[i].p_flags)), 3); \
152 *found = 1; \
153 ++shown; \
154 } \
155 }
156 SHOW_STACK(32)
157 SHOW_STACK(64)
158 }
159
160 if (be_quiet && !shown)
161 return NULL; 247 return NULL;
162 else 248 else
163 return ret; 249 return ret;
164} 250}
251
252static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load)
253{
254 static char ret[12];
255 char *found;
256 unsigned long i, shown, multi_stack, multi_relro, multi_load;
257 int max_pt_load;
258
259 if (!show_phdr) return NULL;
260
261 memcpy(ret, "--- --- ---\0", 12);
262
263 shown = 0;
264 multi_stack = multi_relro = multi_load = 0;
265 max_pt_load = elf_max_pt_load(elf);
266
267#define NOTE_GNU_STACK ".note.GNU-stack"
268#define SHOW_PHDR(B) \
269 if (elf->elf_class == ELFCLASS ## B) { \
270 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
271 Elf ## B ## _Off offset; \
272 uint32_t flags, check_flags; \
273 if (elf->phdr != NULL) { \
274 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
275 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
276 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
277 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
278 if (!file_matches_list(elf->filename, qa_execstack)) {\
279 found = found_phdr; \
280 offset = 0; \
281 check_flags = PF_X; \
282 } else continue; \
283 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
284 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
285 found = found_relro; \
286 offset = 4; \
287 check_flags = PF_X; \
288 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
289 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \
290 if (multi_load++ > max_pt_load) warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
291 if (!file_matches_list(elf->filename, qa_wx_load)) {\
292 found = found_load; \
293 offset = 8; \
294 check_flags = PF_W|PF_X; \
295 } else continue; \
296 } else \
297 continue; \
298 flags = EGET(phdr[i].p_flags); \
299 if (be_quiet && ((flags & check_flags) != check_flags)) \
300 continue; \
301 if ((EGET(phdr[i].p_type) != PT_LOAD) && (fix_elf && ((flags & PF_X) != flags))) { \
302 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \
303 ret[3] = ret[7] = '!'; \
304 flags = EGET(phdr[i].p_flags); \
305 } \
306 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
307 *found = 1; \
308 ++shown; \
309 } \
310 } else if (elf->shdr != NULL) { \
311 /* no program headers which means this is prob an object file */ \
312 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
313 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
314 char *str; \
315 if ((void*)strtbl > (void*)elf->data_end) \
316 goto skip_this_shdr##B; \
317 check_flags = SHF_WRITE|SHF_EXECINSTR; \
318 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
319 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
320 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
321 str = elf->data + offset; \
322 if (str > elf->data + offset + sizeof(NOTE_GNU_STACK)) continue; \
323 if (!strcmp(str, NOTE_GNU_STACK)) { \
324 if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \
325 flags = EGET(shdr[i].sh_flags); \
326 if (be_quiet && ((flags & check_flags) != check_flags)) \
327 continue; \
328 ++*found_phdr; \
329 shown = 1; \
330 if (flags & SHF_WRITE) ret[0] = 'W'; \
331 if (flags & SHF_ALLOC) ret[1] = 'A'; \
332 if (flags & SHF_EXECINSTR) ret[2] = 'X'; \
333 if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \
334 break; \
335 } \
336 } \
337 skip_this_shdr##B: \
338 if (!multi_stack) { \
339 *found_phdr = 1; \
340 shown = 1; \
341 memcpy(ret, "!WX", 3); \
342 } \
343 } \
344 }
345 SHOW_PHDR(32)
346 SHOW_PHDR(64)
347
348 if (be_wewy_wewy_quiet || (be_quiet && !shown))
349 return NULL;
350 else
351 return ret;
352}
353
165static char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 354static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
166{ 355{
167 static char *ret = "TEXTREL"; 356 static const char *ret = "TEXTREL";
168 unsigned long i; 357 unsigned long i;
169 358
170 if (!show_textrel) return NULL; 359 if (!show_textrel && !show_textrels) return NULL;
360
361 if (file_matches_list(elf->filename, qa_textrels)) return NULL;
171 362
172 if (elf->phdr) { 363 if (elf->phdr) {
173#define SHOW_TEXTREL(B) \ 364#define SHOW_TEXTREL(B) \
174 if (elf->elf_class == ELFCLASS ## B) { \ 365 if (elf->elf_class == ELFCLASS ## B) { \
175 Elf ## B ## _Dyn *dyn; \ 366 Elf ## B ## _Dyn *dyn; \
183 dyn = DYN ## B (elf->data + offset); \ 374 dyn = DYN ## B (elf->data + offset); \
184 while (EGET(dyn->d_tag) != DT_NULL) { \ 375 while (EGET(dyn->d_tag) != DT_NULL) { \
185 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 376 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
186 *found_textrel = 1; \ 377 *found_textrel = 1; \
187 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 378 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
188 return ret; \ 379 return (be_wewy_wewy_quiet ? NULL : ret); \
189 } \ 380 } \
190 ++dyn; \ 381 ++dyn; \
191 } \ 382 } \
192 } } 383 } }
193 SHOW_TEXTREL(32) 384 SHOW_TEXTREL(32)
194 SHOW_TEXTREL(64) 385 SHOW_TEXTREL(64)
195 } 386 }
196 387
197 if (be_quiet) 388 if (be_quiet || be_wewy_wewy_quiet)
198 return NULL; 389 return NULL;
199 else 390 else
200 return " - "; 391 return " - ";
201} 392}
393static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
394{
395 unsigned long s, r, rmax;
396 void *symtab_void, *strtab_void, *text_void;
397
398 if (!show_textrels) return NULL;
399
400 /* don't search for TEXTREL's if the ELF doesn't have any */
401 if (!*found_textrel) scanelf_file_textrel(elf, found_textrel);
402 if (!*found_textrel) return NULL;
403
404 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
405 text_void = elf_findsecbyname(elf, ".text");
406
407 if (symtab_void && strtab_void && text_void && elf->shdr) {
408#define SHOW_TEXTRELS(B) \
409 if (elf->elf_class == ELFCLASS ## B) { \
410 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
411 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
412 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
413 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
414 Elf ## B ## _Shdr *text = SHDR ## B (text_void); \
415 Elf ## B ## _Addr vaddr = EGET(text->sh_addr); \
416 uint ## B ## _t memsz = EGET(text->sh_size); \
417 Elf ## B ## _Rel *rel; \
418 Elf ## B ## _Rela *rela; \
419 /* search the section headers for relocations */ \
420 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
421 uint32_t sh_type = EGET(shdr[s].sh_type); \
422 if (sh_type == SHT_REL) { \
423 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \
424 rela = NULL; \
425 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
426 } else if (sh_type == SHT_RELA) { \
427 rel = NULL; \
428 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \
429 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
430 } else \
431 continue; \
432 /* now see if any of the relocs are in the .text */ \
433 for (r = 0; r < rmax; ++r) { \
434 unsigned long sym_max; \
435 Elf ## B ## _Addr offset_tmp; \
436 Elf ## B ## _Sym *func; \
437 Elf ## B ## _Sym *sym; \
438 Elf ## B ## _Addr r_offset; \
439 uint ## B ## _t r_info; \
440 if (sh_type == SHT_REL) { \
441 r_offset = EGET(rel[r].r_offset); \
442 r_info = EGET(rel[r].r_info); \
443 } else { \
444 r_offset = EGET(rela[r].r_offset); \
445 r_info = EGET(rela[r].r_info); \
446 } \
447 /* make sure this relocation is inside of the .text */ \
448 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
449 if (be_verbose <= 2) continue; \
450 } else \
451 *found_textrels = 1; \
452 /* locate this relocation symbol name */ \
453 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
454 if ((void*)sym > (void*)elf->data_end) { \
455 warn("%s: corrupt ELF symbol", elf->filename); \
456 continue; \
457 } \
458 sym_max = ELF ## B ## _R_SYM(r_info); \
459 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
460 sym += sym_max; \
461 else \
462 sym = NULL; \
463 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
464 /* show the raw details about this reloc */ \
465 printf(" %s: ", elf->base_filename); \
466 if (sym && sym->st_name) \
467 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \
468 else \
469 printf("(memory/fake?)"); \
470 printf(" [0x%lX]", (unsigned long)r_offset); \
471 /* now try to find the closest symbol that this rel is probably in */ \
472 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
473 func = NULL; \
474 offset_tmp = 0; \
475 while (sym_max--) { \
476 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
477 func = sym; \
478 offset_tmp = EGET(sym->st_value); \
479 } \
480 ++sym; \
481 } \
482 printf(" in "); \
483 if (func && func->st_name) \
484 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \
485 else \
486 printf("(NULL: fake?)"); \
487 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
488 } \
489 } }
490 SHOW_TEXTRELS(32)
491 SHOW_TEXTRELS(64)
492 }
493 if (!*found_textrels)
494 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
495
496 return NULL;
497}
498
499static void rpath_security_checks(elfobj *, char *, const char *);
500static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
501{
502 struct stat st;
503 switch (*item) {
504 case '/': break;
505 case '.':
506 warnf("Security problem with relative %s '%s' in %s", dt_type, item, elf->filename);
507 break;
508 case ':':
509 case '\0':
510 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
511 break;
512 case '$':
513 if (fstat(elf->fd, &st) != -1)
514 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
515 warnf("Security problem with %s='%s' in %s with mode set of %o",
516 dt_type, item, elf->filename, st.st_mode & 07777);
517 break;
518 default:
519 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
520 break;
521 }
522}
202static 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)
203{ 524{
204 /* TODO: when checking RPATH entries, check each subpath (between :) in ld.so.conf */
205 unsigned long i, s; 525 unsigned long i, s;
206 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
207 void *strtbl_void; 527 void *strtbl_void;
208 528
209 if (!show_rpath) return; 529 if (!show_rpath) return;
237 ++dyn; \ 557 ++dyn; \
238 continue; \ 558 continue; \
239 } \ 559 } \
240 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
241 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
242 if (offset < elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
243 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
244 *r = (char*)(elf->data + offset); \ 564 *r = (char*)(elf->data + offset); \
565 /* cache the length in case we need to nuke this section later on */ \
566 if (fix_elf) \
567 offset = strlen(*r); \
245 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
246 if (be_quiet) \ 569 if (be_quiet) { \
570 size_t len; \
571 char *start, *end; \
572 /* note that we only 'chop' off leading known paths. */ \
573 /* since *r is read-only memory, we can only move the ptr forward. */ \
574 start = *r; \
575 /* scan each path in : delimited list */ \
576 while (start) { \
577 rpath_security_checks(elf, start, get_elfdtype(word)); \
578 end = strchr(start, ':'); \
579 len = (end ? abs(end - start) : strlen(start)); \
580 if (use_ldcache) \
247 for (s = 0; ldpaths[s]; ++s) \ 581 for (s = 0; ldpaths[s]; ++s) \
248 if (!strcmp(ldpaths[s], *r)) { \ 582 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
249 *r = NULL; \ 583 *r = end; \
584 /* corner case ... if RPATH reads "/usr/lib:", we want \
585 * to show ':' rather than '' */ \
586 if (end && end[1] != '\0') \
587 (*r)++; \
588 break; \
589 } \
590 if (!*r || !end) \
250 break; \ 591 break; \
592 else \
593 start = start + len + 1; \
594 } \
595 } \
596 if (*r) { \
597 if (fix_elf > 2 || (fix_elf && **r == '\0')) { \
598 /* just nuke it */ \
599 nuke_it##B: \
600 memset(*r, 0x00, offset); \
601 *r = NULL; \
602 ESET(dyn->d_tag, DT_DEBUG); \
603 ESET(dyn->d_un.d_ptr, 0); \
604 } else if (fix_elf) { \
605 /* try to clean "bad" paths */ \
606 size_t len, tmpdir_len; \
607 char *start, *end; \
608 const char *tmpdir; \
609 start = *r; \
610 tmpdir = (getenv("TMPDIR") ? : "."); \
611 tmpdir_len = strlen(tmpdir); \
612 while (1) { \
613 end = strchr(start, ':'); \
614 if (start == end) { \
615 eat_this_path##B: \
616 len = strlen(end); \
617 memmove(start, end+1, len); \
618 start[len-1] = '\0'; \
619 end = start - 1; \
620 } else if (tmpdir && !strncmp(start, tmpdir, tmpdir_len)) { \
621 if (!end) { \
622 if (start == *r) \
623 goto nuke_it##B; \
624 *--start = '\0'; \
625 } else \
626 goto eat_this_path##B; \
627 } \
628 if (!end) \
629 break; \
630 start = end + 1; \
251 } \ 631 } \
632 if (**r == '\0') \
633 goto nuke_it##B; \
634 } \
635 if (*r) \
252 if (*r) *found_rpath = 1; \ 636 *found_rpath = 1; \
637 } \
253 } \ 638 } \
254 ++dyn; \ 639 ++dyn; \
255 } \ 640 } \
256 } } 641 } }
257 SHOW_RPATH(32) 642 SHOW_RPATH(32)
258 SHOW_RPATH(64) 643 SHOW_RPATH(64)
259 } 644 }
645
646 if (be_wewy_wewy_quiet) return;
260 647
261 if (rpath && runpath) { 648 if (rpath && runpath) {
262 if (!strcmp(rpath, runpath)) { 649 if (!strcmp(rpath, runpath)) {
263 xstrcat(ret, runpath, ret_len); 650 xstrcat(ret, runpath, ret_len);
264 } else { 651 } else {
272 } else if (rpath || runpath) 659 } else if (rpath || runpath)
273 xstrcat(ret, (runpath ? runpath : rpath), ret_len); 660 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
274 else if (!be_quiet) 661 else if (!be_quiet)
275 xstrcat(ret, " - ", ret_len); 662 xstrcat(ret, " - ", ret_len);
276} 663}
664
665#define LDSO_CACHE_MAGIC "ld.so-"
666#define LDSO_CACHE_MAGIC_LEN (sizeof LDSO_CACHE_MAGIC -1)
667#define LDSO_CACHE_VER "1.7.0"
668#define LDSO_CACHE_VER_LEN (sizeof LDSO_CACHE_VER -1)
669#define FLAG_ANY -1
670#define FLAG_TYPE_MASK 0x00ff
671#define FLAG_LIBC4 0x0000
672#define FLAG_ELF 0x0001
673#define FLAG_ELF_LIBC5 0x0002
674#define FLAG_ELF_LIBC6 0x0003
675#define FLAG_REQUIRED_MASK 0xff00
676#define FLAG_SPARC_LIB64 0x0100
677#define FLAG_IA64_LIB64 0x0200
678#define FLAG_X8664_LIB64 0x0300
679#define FLAG_S390_LIB64 0x0400
680#define FLAG_POWERPC_LIB64 0x0500
681#define FLAG_MIPS64_LIBN32 0x0600
682#define FLAG_MIPS64_LIBN64 0x0700
683
684static char *lookup_cache_lib(elfobj *, char *);
685#if defined(__GLIBC__) || defined(__UCLIBC__)
686static char *lookup_cache_lib(elfobj *elf, char *fname)
687{
688 int fd = 0;
689 char *strs;
690 static char buf[__PAX_UTILS_PATH_MAX] = "";
691 const char *cachefile = "/etc/ld.so.cache";
692 struct stat st;
693
694 typedef struct {
695 char magic[LDSO_CACHE_MAGIC_LEN];
696 char version[LDSO_CACHE_VER_LEN];
697 int nlibs;
698 } header_t;
699 header_t *header;
700
701 typedef struct {
702 int flags;
703 int sooffset;
704 int liboffset;
705 } libentry_t;
706 libentry_t *libent;
707
708 if (fname == NULL)
709 return NULL;
710
711 if (ldcache == 0) {
712 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1)
713 return NULL;
714
715 /* cache these values so we only map/unmap the cache file once */
716 ldcache_size = st.st_size;
717 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
718
719 close(fd);
720
721 if (ldcache == (caddr_t)-1) {
722 ldcache = 0;
723 return NULL;
724 }
725
726 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN))
727 return NULL;
728 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
729 return NULL;
730 }
731
732 header = (header_t *) ldcache;
733 libent = (libentry_t *) (ldcache + sizeof(header_t));
734 strs = (char *) &libent[header->nlibs];
735
736 for (fd = 0; fd < header->nlibs; fd++) {
737 /* this should be more fine grained, but for now we assume that
738 * diff arches will not be cached together. and we ignore the
739 * the different multilib mips cases. */
740 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
741 continue;
742 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
743 continue;
744
745 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
746 continue;
747 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
748 }
749 return buf;
750}
751#else
752#warning Cache support not implemented for your current target.
753static char *lookup_cache_lib(elfobj *elf, char *fname)
754{
755 return NULL;
756}
757#endif
758
277static void scanelf_file_needed(elfobj *elf, char *found_needed, char **ret, size_t *ret_len) 759static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
278{ 760{
279 unsigned long i; 761 unsigned long i;
280 char *needed; 762 char *needed;
281 void *strtbl_void; 763 void *strtbl_void;
764 char *p;
282 765
283 if (!show_needed) return; 766 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
284 767
285 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 768 strtbl_void = elf_findsecbyname(elf, ".dynstr");
286 769
287 if (elf->phdr && strtbl_void) { 770 if (elf->phdr && strtbl_void) {
288#define SHOW_NEEDED(B) \ 771#define SHOW_NEEDED(B) \
298 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 781 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
299 dyn = DYN ## B (elf->data + offset); \ 782 dyn = DYN ## B (elf->data + offset); \
300 while (EGET(dyn->d_tag) != DT_NULL) { \ 783 while (EGET(dyn->d_tag) != DT_NULL) { \
301 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 784 if (EGET(dyn->d_tag) == DT_NEEDED) { \
302 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 785 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
303 if (offset >= elf->len) { \ 786 if (offset >= (Elf ## B ## _Off)elf->len) { \
304 ++dyn; \ 787 ++dyn; \
305 continue; \ 788 continue; \
306 } \ 789 } \
307 needed = (char*)(elf->data + offset); \ 790 needed = (char*)(elf->data + offset); \
791 if (op == 0) { \
792 if (!be_wewy_wewy_quiet) { \
308 if (*found_needed) xchrcat(ret, ',', ret_len); \ 793 if (*found_needed) xchrcat(ret, ',', ret_len); \
794 if (use_ldcache) \
795 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
796 needed = p; \
309 xstrcat(ret, needed, ret_len); \ 797 xstrcat(ret, needed, ret_len); \
798 } \
310 *found_needed = 1; \ 799 *found_needed = 1; \
800 } else { \
801 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \
802 *found_lib = 1; \
803 return (be_wewy_wewy_quiet ? NULL : needed); \
804 } \
805 } \
311 } \ 806 } \
312 ++dyn; \ 807 ++dyn; \
313 } \ 808 } \
314 } } 809 } }
315 SHOW_NEEDED(32) 810 SHOW_NEEDED(32)
316 SHOW_NEEDED(64) 811 SHOW_NEEDED(64)
812 if (op == 0 && !*found_needed && be_verbose)
813 warn("ELF lacks DT_NEEDED sections: %s", elf->filename);
317 } 814 }
815
816 return NULL;
318} 817}
319static char *scanelf_file_interp(elfobj *elf, char *found_interp) 818static char *scanelf_file_interp(elfobj *elf, char *found_interp)
320{ 819{
321 void *strtbl_void; 820 void *strtbl_void;
322 821
327 if (strtbl_void) { 826 if (strtbl_void) {
328#define SHOW_INTERP(B) \ 827#define SHOW_INTERP(B) \
329 if (elf->elf_class == ELFCLASS ## B) { \ 828 if (elf->elf_class == ELFCLASS ## B) { \
330 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 829 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
331 *found_interp = 1; \ 830 *found_interp = 1; \
332 return elf->data + EGET(strtbl->sh_offset); \ 831 return (be_wewy_wewy_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \
333 } 832 }
334 SHOW_INTERP(32) 833 SHOW_INTERP(32)
335 SHOW_INTERP(64) 834 SHOW_INTERP(64)
336 } 835 }
337 return NULL; 836 return NULL;
338} 837}
339static char *scanelf_file_bind(elfobj *elf, char *found_bind) 838static char *scanelf_file_bind(elfobj *elf, char *found_bind)
340{ 839{
341 unsigned long i; 840 unsigned long i;
342 struct stat s; 841 struct stat s;
842 char dynamic = 0;
343 843
344 if (!show_bind) return NULL; 844 if (!show_bind) return NULL;
345 if (!elf->phdr) return NULL; 845 if (!elf->phdr) return NULL;
346 846
347#define SHOW_BIND(B) \ 847#define SHOW_BIND(B) \
350 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 850 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
351 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 851 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
352 Elf ## B ## _Off offset; \ 852 Elf ## B ## _Off offset; \
353 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 853 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
354 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 854 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
855 dynamic = 1; \
355 offset = EGET(phdr[i].p_offset); \ 856 offset = EGET(phdr[i].p_offset); \
356 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 857 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
357 dyn = DYN ## B (elf->data + offset); \ 858 dyn = DYN ## B (elf->data + offset); \
358 while (EGET(dyn->d_tag) != DT_NULL) { \ 859 while (EGET(dyn->d_tag) != DT_NULL) { \
359 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 860 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
360 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \ 861 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
361 { \ 862 { \
362 if (be_quiet) return NULL; \ 863 if (be_quiet) return NULL; \
363 *found_bind = 1; \ 864 *found_bind = 1; \
364 return "NOW"; \ 865 return (char *)(be_wewy_wewy_quiet ? NULL : "NOW"); \
365 } \ 866 } \
366 ++dyn; \ 867 ++dyn; \
367 } \ 868 } \
368 } \ 869 } \
369 } 870 }
370 SHOW_BIND(32) 871 SHOW_BIND(32)
371 SHOW_BIND(64) 872 SHOW_BIND(64)
372 873
874 if (be_wewy_wewy_quiet) return NULL;
875
373 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) { 876 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) {
374 return NULL; 877 return NULL;
375 } else { 878 } else {
376 *found_bind = 1; 879 *found_bind = 1;
377 return "LAZY"; 880 return (char *) (dynamic ? "LAZY" : "STATIC");
378 } 881 }
379} 882}
380static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename) 883static char *scanelf_file_soname(elfobj *elf, char *found_soname)
381{ 884{
382 unsigned long i; 885 unsigned long i;
886 char *soname;
887 void *strtbl_void;
888
889 if (!show_soname) return NULL;
890
891 strtbl_void = elf_findsecbyname(elf, ".dynstr");
892
893 if (elf->phdr && strtbl_void) {
894#define SHOW_SONAME(B) \
895 if (elf->elf_class == ELFCLASS ## B) { \
896 Elf ## B ## _Dyn *dyn; \
897 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
898 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
899 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
900 Elf ## B ## _Off offset; \
901 /* only look for soname in shared objects */ \
902 if (ehdr->e_type != ET_DYN) \
903 return NULL; \
904 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
905 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
906 offset = EGET(phdr[i].p_offset); \
907 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
908 dyn = DYN ## B (elf->data + offset); \
909 while (EGET(dyn->d_tag) != DT_NULL) { \
910 if (EGET(dyn->d_tag) == DT_SONAME) { \
911 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
912 if (offset >= (Elf ## B ## _Off)elf->len) { \
913 ++dyn; \
914 continue; \
915 } \
916 soname = (char*)(elf->data + offset); \
917 *found_soname = 1; \
918 return (be_wewy_wewy_quiet ? NULL : soname); \
919 } \
920 ++dyn; \
921 } \
922 } }
923 SHOW_SONAME(32)
924 SHOW_SONAME(64)
925 }
926
927 return NULL;
928}
929static char *scanelf_file_sym(elfobj *elf, char *found_sym)
930{
931 unsigned long i;
932 char *ret;
383 void *symtab_void, *strtab_void; 933 void *symtab_void, *strtab_void;
384 934
385 if (!find_sym) return NULL; 935 if (!find_sym) return NULL;
936 ret = find_sym;
386 937
387 symtab_void = elf_findsecbyname(elf, ".symtab"); 938 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
388 strtab_void = elf_findsecbyname(elf, ".strtab");
389 939
390 if (symtab_void && strtab_void) { 940 if (symtab_void && strtab_void) {
391 char *base, *basemem;
392 basemem = xstrdup(filename);
393 base = basename(basemem);
394#define FIND_SYM(B) \ 941#define FIND_SYM(B) \
395 if (elf->elf_class == ELFCLASS ## B) { \ 942 if (elf->elf_class == ELFCLASS ## B) { \
396 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 943 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
397 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 944 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
398 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 945 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
399 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 946 unsigned long cnt = EGET(symtab->sh_entsize); \
400 char *symname; \ 947 char *symname; \
948 if (cnt) \
949 cnt = EGET(symtab->sh_size) / cnt; \
401 for (i = 0; i < cnt; ++i) { \ 950 for (i = 0; i < cnt; ++i) { \
402 if (sym->st_name) { \ 951 if (sym->st_name) { \
952 /* make sure the symbol name is in acceptable memory range */ \
403 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 953 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
954 if ((void*)symname > (void*)elf->data_end) { \
955 warnf("%s: corrupt ELF symbols", elf->filename); \
956 ++sym; \
957 continue; \
958 } \
959 /* debug display ... show all symbols and some extra info */ \
404 if (*find_sym == '*') { \ 960 if (*ret == '*') { \
405 printf("%s(%s) %5lX %15s %s\n", \ 961 printf("%s(%s) %5lX %15s %s\n", \
406 ((*found_sym == 0) ? "\n\t" : "\t"), \ 962 ((*found_sym == 0) ? "\n\t" : "\t"), \
407 base, \ 963 elf->base_filename, \
408 (long)sym->st_size, \ 964 (unsigned long)sym->st_size, \
409 (char *)get_elfstttype(sym->st_info), \ 965 get_elfstttype(sym->st_info), \
410 symname); \ 966 symname); \
411 *found_sym = 1; \ 967 *found_sym = 1; \
412 } else if ((strcmp(find_sym, symname) == 0) || \ 968 } else { \
413 (strcmp(symname, versioned_symname) == 0)) \ 969 /* allow the user to specify a comma delimited list of symbols to search for */ \
970 char *this_sym, *next_sym; \
971 this_sym = ret; \
972 do { \
973 next_sym = strchr(this_sym, ','); \
974 if (next_sym == NULL) \
975 next_sym = this_sym + strlen(this_sym); \
976 /* do we want a defined symbol ? */ \
977 if (*this_sym == '+') { \
978 if (sym->st_shndx == SHN_UNDEF) \
979 goto skip_this_sym##B; \
980 ++this_sym; \
981 /* do we want an undefined symbol ? */ \
982 } else if (*this_sym == '-') { \
983 if (sym->st_shndx != SHN_UNDEF) \
984 goto skip_this_sym##B; \
985 ++this_sym; \
986 } \
987 /* ok, lets compare the name now */ \
988 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
989 (strncmp(symname, versioned_symname, strlen(versioned_symname)) == 0)) { \
990 if (be_semi_verbose) { \
991 char buf[126]; \
992 snprintf(buf, sizeof(buf), "%lX %s %s", \
993 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
994 ret = buf; \
995 } else \
996 ret = this_sym; \
414 (*found_sym)++; \ 997 (*found_sym)++; \
998 goto break_out; \
999 } \
1000 skip_this_sym##B: this_sym = next_sym + 1; \
1001 } while (*next_sym != '\0'); \
1002 } \
415 } \ 1003 } \
416 ++sym; \ 1004 ++sym; \
417 } } 1005 } }
418 FIND_SYM(32) 1006 FIND_SYM(32)
419 FIND_SYM(64) 1007 FIND_SYM(64)
420 free(basemem);
421 } 1008 }
1009
1010break_out:
1011 if (be_wewy_wewy_quiet) return NULL;
1012
422 if (*find_sym != '*' && *found_sym) 1013 if (*find_sym != '*' && *found_sym)
423 return find_sym; 1014 return ret;
424 if (be_quiet) 1015 if (be_quiet)
425 return NULL; 1016 return NULL;
426 else 1017 else
427 return " - "; 1018 return (char *)" - ";
428} 1019}
1020
1021
1022static char *scanelf_file_sections(elfobj *elf, char *found_section)
1023{
1024 if (!find_section)
1025 return NULL;
1026
1027#define FIND_SECTION(B) \
1028 if (elf->elf_class == ELFCLASS ## B) { \
1029 int invert; \
1030 Elf ## B ## _Shdr *section; \
1031 invert = (*find_section == '!' ? 1 : 0); \
1032 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \
1033 if ((section == NULL && invert) || (section != NULL && !invert)) \
1034 *found_section = 1; \
1035 }
1036 FIND_SECTION(32)
1037 FIND_SECTION(64)
1038
1039 if (be_wewy_wewy_quiet)
1040 return NULL;
1041
1042 if (*found_section)
1043 return find_section;
1044
1045 if (be_quiet)
1046 return NULL;
1047 else
1048 return (char *)" - ";
1049}
1050
429/* scan an elf file and show all the fun stuff */ 1051/* scan an elf file and show all the fun stuff */
430// #define prints(str) fputs(str, stdout)
431#define prints(str) write(fileno(stdout), str, strlen(str)) 1052#define prints(str) write(fileno(stdout), str, strlen(str))
432static void scanelf_file(const char *filename) 1053static int scanelf_elfobj(elfobj *elf)
433{ 1054{
434 unsigned long i; 1055 unsigned long i;
435 char found_pax, found_stack, found_relro, found_textrel, 1056 char found_pax, found_phdr, found_relro, found_load, found_textrel,
436 found_rpath, found_needed, found_interp, found_bind, 1057 found_rpath, found_needed, found_interp, found_bind, found_soname,
437 found_sym, found_file; 1058 found_sym, found_lib, found_file, found_textrels, found_section;
438 elfobj *elf;
439 struct stat st;
440 static char *out_buffer = NULL; 1059 static char *out_buffer = NULL;
441 static size_t out_len; 1060 static size_t out_len;
442 1061
443 /* make sure 'filename' exists */
444 if (lstat(filename, &st) == -1) {
445 if (be_verbose > 2) printf("%s: does not exist\n", filename);
446 return;
447 }
448 /* always handle regular files and handle symlinked files if no -y */
449 if (S_ISLNK(st.st_mode)) {
450 if (!scan_symlink) return;
451 stat(filename, &st);
452 }
453 if (!S_ISREG(st.st_mode)) {
454 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
455 return;
456 }
457
458 found_pax = found_stack = found_relro = found_textrel = \ 1062 found_pax = found_phdr = found_relro = found_load = found_textrel = \
459 found_rpath = found_needed = found_interp = found_bind = \ 1063 found_rpath = found_needed = found_interp = found_bind = found_soname = \
460 found_sym = found_file = 0; 1064 found_sym = found_lib = found_file = found_textrels = found_section = 0;
461 1065
462 /* verify this is real ELF */
463 if ((elf = readelf(filename)) == NULL) {
464 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
465 return;
466 }
467
468 if (be_verbose > 1) 1066 if (be_verbose > 2)
469 printf("%s: scanning file {%s,%s}\n", filename, 1067 printf("%s: scanning file {%s,%s}\n", elf->filename,
470 get_elfeitype(elf, EI_CLASS, elf->elf_class), 1068 get_elfeitype(EI_CLASS, elf->elf_class),
471 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA])); 1069 get_elfeitype(EI_DATA, elf->data[EI_DATA]));
472 else if (be_verbose) 1070 else if (be_verbose > 1)
473 printf("%s: scanning file\n", filename); 1071 printf("%s: scanning file\n", elf->filename);
474 1072
475 /* init output buffer */ 1073 /* init output buffer */
476 if (!out_buffer) { 1074 if (!out_buffer) {
477 out_len = sizeof(char) * 80; 1075 out_len = sizeof(char) * 80;
478 out_buffer = (char*)xmalloc(out_len); 1076 out_buffer = (char*)xmalloc(out_len);
480 *out_buffer = '\0'; 1078 *out_buffer = '\0';
481 1079
482 /* show the header */ 1080 /* show the header */
483 if (!be_quiet && show_banner) { 1081 if (!be_quiet && show_banner) {
484 for (i = 0; out_format[i]; ++i) { 1082 for (i = 0; out_format[i]; ++i) {
485 if (out_format[i] != '%') continue; 1083 if (!IS_MODIFIER(out_format[i])) continue;
486 1084
487 switch (out_format[++i]) { 1085 switch (out_format[++i]) {
1086 case '+': break;
488 case '%': break; 1087 case '%': break;
1088 case '#': break;
1089 case 'F':
1090 case 'p':
489 case 'F': prints("FILE "); found_file = 1; break; 1091 case 'f': prints("FILE "); found_file = 1; break;
490 case 'o': prints(" TYPE "); break; 1092 case 'o': prints(" TYPE "); break;
491 case 'x': prints(" PAX "); break; 1093 case 'x': prints(" PAX "); break;
492 case 'e': prints("STK/REL "); break; 1094 case 'e': prints("STK/REL/PTL "); break;
493 case 't': prints("TEXTREL "); break; 1095 case 't': prints("TEXTREL "); break;
494 case 'r': prints("RPATH "); break; 1096 case 'r': prints("RPATH "); break;
495 case 'n': prints("NEEDED "); break; 1097 case 'n': prints("NEEDED "); break;
496 case 'i': prints("INTERP "); break; 1098 case 'i': prints("INTERP "); break;
497 case 'b': prints("BIND "); break; 1099 case 'b': prints("BIND "); break;
1100 case 'S': prints("SONAME "); break;
498 case 's': prints("SYM "); break; 1101 case 's': prints("SYM "); break;
1102 case 'N': prints("LIB "); break;
1103 case 'T': prints("TEXTRELS "); break;
1104 case 'k': prints("SECTION "); break;
1105 default: warnf("'%c' has no title ?", out_format[i]);
499 } 1106 }
500 } 1107 }
501 if (!found_file) prints("FILE "); 1108 if (!found_file) prints("FILE ");
502 prints("\n"); 1109 prints("\n");
503 found_file = 0; 1110 found_file = 0;
505 } 1112 }
506 1113
507 /* dump all the good stuff */ 1114 /* dump all the good stuff */
508 for (i = 0; out_format[i]; ++i) { 1115 for (i = 0; out_format[i]; ++i) {
509 const char *out; 1116 const char *out;
1117 const char *tmp;
510 1118
511 /* make sure we trim leading spaces in quiet mode */ 1119 if (!IS_MODIFIER(out_format[i])) {
512 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
513 *out_buffer = '\0';
514
515 if (out_format[i] != '%') {
516 xchrcat(&out_buffer, out_format[i], &out_len); 1120 xchrcat(&out_buffer, out_format[i], &out_len);
517 continue; 1121 continue;
518 } 1122 }
519 1123
520 out = NULL; 1124 out = NULL;
1125 be_wewy_wewy_quiet = (out_format[i] == '#');
1126 be_semi_verbose = (out_format[i] == '+');
521 switch (out_format[++i]) { 1127 switch (out_format[++i]) {
1128 case '+':
1129 case '%':
1130 case '#':
522 case '%': xchrcat(&out_buffer, '%', &out_len); break; 1131 xchrcat(&out_buffer, out_format[i], &out_len); break;
523 case 'F': found_file = 1; xstrcat(&out_buffer, filename, &out_len); break; 1132 case 'F':
1133 found_file = 1;
1134 if (be_wewy_wewy_quiet) break;
1135 xstrcat(&out_buffer, elf->filename, &out_len);
1136 break;
1137 case 'p':
1138 found_file = 1;
1139 if (be_wewy_wewy_quiet) break;
1140 tmp = elf->filename;
1141 if (search_path) {
1142 ssize_t len_search = strlen(search_path);
1143 ssize_t len_file = strlen(elf->filename);
1144 if (!strncmp(elf->filename, search_path, len_search) && \
1145 len_file > len_search)
1146 tmp += len_search;
1147 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
1148 }
1149 xstrcat(&out_buffer, tmp, &out_len);
1150 break;
1151 case 'f':
1152 found_file = 1;
1153 if (be_wewy_wewy_quiet) break;
1154 tmp = strrchr(elf->filename, '/');
1155 tmp = (tmp == NULL ? elf->filename : tmp+1);
1156 xstrcat(&out_buffer, tmp, &out_len);
1157 break;
524 case 'o': out = get_elfetype(elf); break; 1158 case 'o': out = get_elfetype(elf); break;
525 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1159 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
526 case 'e': out = scanelf_file_stack(elf, &found_stack, &found_relro); break; 1160 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
527 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1161 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1162 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
528 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 1163 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1164 case 'n':
529 case 'n': scanelf_file_needed(elf, &found_needed, &out_buffer, &out_len); break; 1165 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
530 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1166 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
531 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1167 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1168 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
532 case 's': out = scanelf_file_sym(elf, &found_sym, filename); break; 1169 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1170 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1171 default: warnf("'%c' has no scan code?", out_format[i]);
533 } 1172 }
1173 if (out) {
1174 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1175 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1176 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1177 else
534 if (out) xstrcat(&out_buffer, out, &out_len); 1178 xstrcat(&out_buffer, out, &out_len);
1179 }
535 } 1180 }
536 1181
537#define FOUND_SOMETHING() \ 1182#define FOUND_SOMETHING() \
538 (found_pax || found_stack || found_textrel || found_rpath || \ 1183 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
539 found_needed || found_interp || found_bind || found_sym) 1184 found_rpath || found_needed || found_interp || found_bind || \
1185 found_soname || found_sym || found_lib || found_textrels || found_section )
540 1186
541 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { 1187 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
542 xchrcat(&out_buffer, ' ', &out_len); 1188 xchrcat(&out_buffer, ' ', &out_len);
543 xstrcat(&out_buffer, filename, &out_len); 1189 xstrcat(&out_buffer, elf->filename, &out_len);
544 } 1190 }
545 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) 1191 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
546 puts(out_buffer); 1192 puts(out_buffer);
1193 fflush(stdout);
1194 }
547 1195
1196 return 0;
1197}
1198
1199/* scan a single elf */
1200static int scanelf_elf(const char *filename, int fd, size_t len)
1201{
1202 int ret = 1;
1203 elfobj *elf;
1204
1205 /* verify this is real ELF */
1206 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1207 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1208 return ret;
1209 }
1210 switch (match_bits) {
1211 case 32:
1212 if (elf->elf_class != ELFCLASS32)
1213 goto label_done;
1214 break;
1215 case 64:
1216 if (elf->elf_class != ELFCLASS64)
1217 goto label_done;
1218 break;
1219 default: break;
1220 }
1221 if (strlen(match_etypes)) {
1222 char sbuf[126];
1223 strncpy(sbuf, match_etypes, sizeof(sbuf));
1224 if (strchr(match_etypes, ',') != NULL) {
1225 char *p;
1226 while((p = strrchr(sbuf, ',')) != NULL) {
1227 *p = 0;
1228 if (etype_lookup(p+1) == get_etype(elf))
1229 goto label_ret;
1230 }
1231 }
1232 if (etype_lookup(sbuf) != get_etype(elf))
1233 goto label_done;
1234 }
1235
1236label_ret:
1237 ret = scanelf_elfobj(elf);
1238
1239label_done:
548 unreadelf(elf); 1240 unreadelf(elf);
1241 return ret;
1242}
1243
1244/* scan an archive of elfs */
1245static int scanelf_archive(const char *filename, int fd, size_t len)
1246{
1247 archive_handle *ar;
1248 archive_member *m;
1249 char *ar_buffer;
1250 elfobj *elf;
1251
1252 ar = ar_open_fd(filename, fd);
1253 if (ar == NULL)
1254 return 1;
1255
1256 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1257 while ((m=ar_next(ar)) != NULL) {
1258 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1259 if (elf) {
1260 scanelf_elfobj(elf);
1261 unreadelf(elf);
1262 }
1263 }
1264 munmap(ar_buffer, len);
1265
1266 return 0;
1267}
1268/* scan a file which may be an elf or an archive or some other magical beast */
1269static void scanelf_file(const char *filename)
1270{
1271 struct stat st;
1272 int fd;
1273
1274 /* make sure 'filename' exists */
1275 if (lstat(filename, &st) == -1) {
1276 if (be_verbose > 2) printf("%s: does not exist\n", filename);
1277 return;
1278 }
1279
1280 /* always handle regular files and handle symlinked files if no -y */
1281 if (S_ISLNK(st.st_mode)) {
1282 if (!scan_symlink) return;
1283 stat(filename, &st);
1284 }
1285 if (!S_ISREG(st.st_mode)) {
1286 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1287 return;
1288 }
1289
1290 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1291 return;
1292
1293 if (scanelf_elf(filename, fd, st.st_size) == 1 && scan_archives)
1294 /* if it isn't an ELF, maybe it's an .a archive */
1295 scanelf_archive(filename, fd, st.st_size);
1296
1297 close(fd);
549} 1298}
550 1299
551/* scan a directory for ET_EXEC files and print when we find one */ 1300/* scan a directory for ET_EXEC files and print when we find one */
552static void scanelf_dir(const char *path) 1301static void scanelf_dir(const char *path)
553{ 1302{
554 register DIR *dir; 1303 register DIR *dir;
555 register struct dirent *dentry; 1304 register struct dirent *dentry;
556 struct stat st_top, st; 1305 struct stat st_top, st;
557 char buf[_POSIX_PATH_MAX]; 1306 char buf[__PAX_UTILS_PATH_MAX];
558 size_t pathlen = 0, len = 0; 1307 size_t pathlen = 0, len = 0;
559 1308
560 /* make sure path exists */ 1309 /* make sure path exists */
561 if (lstat(path, &st_top) == -1) { 1310 if (lstat(path, &st_top) == -1) {
562 if (be_verbose > 2) printf("%s: does not exist\n", path); 1311 if (be_verbose > 2) printf("%s: does not exist\n", path);
572 /* now scan the dir looking for fun stuff */ 1321 /* now scan the dir looking for fun stuff */
573 if ((dir = opendir(path)) == NULL) { 1322 if ((dir = opendir(path)) == NULL) {
574 warnf("could not opendir %s: %s", path, strerror(errno)); 1323 warnf("could not opendir %s: %s", path, strerror(errno));
575 return; 1324 return;
576 } 1325 }
577 if (be_verbose) printf("%s: scanning dir\n", path); 1326 if (be_verbose > 1) printf("%s: scanning dir\n", path);
578 1327
579 pathlen = strlen(path); 1328 pathlen = strlen(path);
580 while ((dentry = readdir(dir))) { 1329 while ((dentry = readdir(dir))) {
581 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 1330 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
582 continue; 1331 continue;
583 len = (pathlen + 1 + strlen(dentry->d_name) + 1); 1332 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
584 if (len >= sizeof(buf)) { 1333 if (len >= sizeof(buf)) {
585 warnf("Skipping '%s': len > sizeof(buf); %d > %d\n", path, (int)len, (int)sizeof(buf)); 1334 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1335 (unsigned long)len, (unsigned long)sizeof(buf));
586 continue; 1336 continue;
587 } 1337 }
588 sprintf(buf, "%s/%s", path, dentry->d_name); 1338 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
589 if (lstat(buf, &st) != -1) { 1339 if (lstat(buf, &st) != -1) {
590 if (S_ISREG(st.st_mode)) 1340 if (S_ISREG(st.st_mode))
591 scanelf_file(buf); 1341 scanelf_file(buf);
592 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1342 else if (dir_recurse && S_ISDIR(st.st_mode)) {
593 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1343 if (dir_crossmount || (st_top.st_dev == st.st_dev))
596 } 1346 }
597 } 1347 }
598 closedir(dir); 1348 closedir(dir);
599} 1349}
600 1350
601static int scanelf_from_file(char *filename) 1351static int scanelf_from_file(const char *filename)
602{ 1352{
603 FILE *fp = NULL; 1353 FILE *fp = NULL;
604 char *p; 1354 char *p;
605 char path[_POSIX_PATH_MAX]; 1355 char path[__PAX_UTILS_PATH_MAX];
606 1356
607 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) 1357 if (strcmp(filename, "-") == 0)
608 fp = stdin; 1358 fp = stdin;
609 else if ((fp = fopen(filename, "r")) == NULL) 1359 else if ((fp = fopen(filename, "r")) == NULL)
610 return 1; 1360 return 1;
611 1361
612 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1362 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
613 if ((p = strchr(path, '\n')) != NULL) 1363 if ((p = strchr(path, '\n')) != NULL)
614 *p = 0; 1364 *p = 0;
1365 search_path = path;
615 scanelf_dir(path); 1366 scanelf_dir(path);
616 } 1367 }
617 if (fp != stdin) 1368 if (fp != stdin)
618 fclose(fp); 1369 fclose(fp);
619 return 0; 1370 return 0;
620} 1371}
621 1372
622static void load_ld_so_conf() 1373#if defined(__GLIBC__) || defined(__UCLIBC__)
1374static int load_ld_so_conf(int i, const char *fname)
623{ 1375{
624 FILE *fp = NULL; 1376 FILE *fp = NULL;
625 char *p; 1377 char *p;
626 char path[_POSIX_PATH_MAX]; 1378 char path[__PAX_UTILS_PATH_MAX];
627 int i = 0;
628 1379
629 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 1380 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
630 return; 1381 return i;
631 1382
1383 if ((fp = fopen(fname, "r")) == NULL)
1384 return i;
1385
632 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1386 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
633 if (*path != '/')
634 continue;
635
636 if ((p = strrchr(path, '\r')) != NULL) 1387 if ((p = strrchr(path, '\r')) != NULL)
637 *p = 0; 1388 *p = 0;
638 if ((p = strchr(path, '\n')) != NULL) 1389 if ((p = strchr(path, '\n')) != NULL)
639 *p = 0; 1390 *p = 0;
1391 // recursive includes of the same file will make this segfault.
1392 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1393 glob64_t gl;
1394 size_t x;
1395 char gpath[__PAX_UTILS_PATH_MAX];
1396
1397 memset(gpath, 0, sizeof(gpath));
1398
1399 if (path[8] != '/')
1400 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]);
1401 else
1402 strncpy(gpath, &path[8], sizeof(gpath));
1403
1404 if ((glob64(gpath, 0, NULL, &gl)) == 0) {
1405 for (x = 0; x < gl.gl_pathc; ++x) {
1406 /* try to avoid direct loops */
1407 if (strcmp(gl.gl_pathv[x], fname) == 0)
1408 continue;
1409 i = load_ld_so_conf(i, gl.gl_pathv[x]);
1410 if (i + 1 >= sizeof(ldpaths) / sizeof(*ldpaths)) {
1411 globfree64(&gl);
1412 return i;
1413 }
1414 }
1415 globfree64 (&gl);
1416 continue;
1417 } else
1418 abort();
1419 }
1420 if (*path != '/')
1421 continue;
640 1422
641 ldpaths[i++] = xstrdup(path); 1423 ldpaths[i++] = xstrdup(path);
642 1424
643 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1425 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
644 break; 1426 break;
645 } 1427 }
646 ldpaths[i] = NULL; 1428 ldpaths[i] = NULL;
647 1429
648 fclose(fp); 1430 fclose(fp);
1431 return i;
649} 1432}
1433#endif
1434
1435#if defined(__FreeBSD__) || (__DragonFly__)
1436static int load_ld_so_hints(int i, const char *fname)
1437{
1438 FILE *fp = NULL;
1439 char *b = NULL, *p;
1440 struct elfhints_hdr hdr;
1441
1442 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
1443 return i;
1444
1445 if ((fp = fopen(fname, "r")) == NULL)
1446 return i;
1447
1448 if ( fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1449 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1450 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1
1451 ) {
1452 fclose(fp);
1453 return i;
1454 }
1455
1456 b = (char*)malloc(hdr.dirlistlen+1);
1457 if ( fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1 ) {
1458 fclose(fp);
1459 free(b);
1460 return i;
1461 }
1462
1463 while ( (p = strsep(&b, ":")) ) {
1464 if ( *p == '\0' ) continue;
1465 ldpaths[i++] = xstrdup(p);
1466
1467 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
1468 break;
1469 }
1470 ldpaths[i] = NULL;
1471
1472 free(b);
1473 fclose(fp);
1474 return i;
1475}
1476#endif
650 1477
651/* scan /etc/ld.so.conf for paths */ 1478/* scan /etc/ld.so.conf for paths */
652static void scanelf_ldpath() 1479static void scanelf_ldpath()
653{ 1480{
654 char scan_l, scan_ul, scan_ull; 1481 char scan_l, scan_ul, scan_ull;
688 } 1515 }
689 1516
690 free(path); 1517 free(path);
691} 1518}
692 1519
693
694
695/* usage / invocation handling functions */ 1520/* usage / invocation handling functions */
696#define PARSE_FLAGS "plRmyxetrnibs:aqvF:f:o:BhV" 1521#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:BhV"
697#define a_argument required_argument 1522#define a_argument required_argument
698static struct option const long_opts[] = { 1523static struct option const long_opts[] = {
699 {"path", no_argument, NULL, 'p'}, 1524 {"path", no_argument, NULL, 'p'},
700 {"ldpath", no_argument, NULL, 'l'}, 1525 {"ldpath", no_argument, NULL, 'l'},
701 {"recursive", no_argument, NULL, 'R'}, 1526 {"recursive", no_argument, NULL, 'R'},
702 {"mount", no_argument, NULL, 'm'}, 1527 {"mount", no_argument, NULL, 'm'},
703 {"symlink", no_argument, NULL, 'y'}, 1528 {"symlink", no_argument, NULL, 'y'},
1529 {"archives", no_argument, NULL, 'A'},
1530 {"ldcache", no_argument, NULL, 'L'},
1531 {"fix", no_argument, NULL, 'X'},
1532 {"setpax", a_argument, NULL, 'z'},
704 {"pax", no_argument, NULL, 'x'}, 1533 {"pax", no_argument, NULL, 'x'},
705 {"header", no_argument, NULL, 'e'}, 1534 {"header", no_argument, NULL, 'e'},
706 {"textrel", no_argument, NULL, 't'}, 1535 {"textrel", no_argument, NULL, 't'},
707 {"rpath", no_argument, NULL, 'r'}, 1536 {"rpath", no_argument, NULL, 'r'},
708 {"needed", no_argument, NULL, 'n'}, 1537 {"needed", no_argument, NULL, 'n'},
709 {"interp", no_argument, NULL, 'i'}, 1538 {"interp", no_argument, NULL, 'i'},
710 {"bind", no_argument, NULL, 'b'}, 1539 {"bind", no_argument, NULL, 'b'},
1540 {"soname", no_argument, NULL, 'S'},
711 {"symbol", a_argument, NULL, 's'}, 1541 {"symbol", a_argument, NULL, 's'},
1542 {"section", a_argument, NULL, 'k'},
1543 {"lib", a_argument, NULL, 'N'},
1544 {"gmatch", no_argument, NULL, 'g'},
1545 {"textrels", no_argument, NULL, 'T'},
1546 {"etype", a_argument, NULL, 'E'},
1547 {"bits", a_argument, NULL, 'M'},
712 {"all", no_argument, NULL, 'a'}, 1548 {"all", no_argument, NULL, 'a'},
713 {"quiet", no_argument, NULL, 'q'}, 1549 {"quiet", no_argument, NULL, 'q'},
714 {"verbose", no_argument, NULL, 'v'}, 1550 {"verbose", no_argument, NULL, 'v'},
715 {"format", a_argument, NULL, 'F'}, 1551 {"format", a_argument, NULL, 'F'},
716 {"from", a_argument, NULL, 'f'}, 1552 {"from", a_argument, NULL, 'f'},
717 {"file", a_argument, NULL, 'o'}, 1553 {"file", a_argument, NULL, 'o'},
718 {"nobanner", no_argument, NULL, 'B'}, 1554 {"nobanner", no_argument, NULL, 'B'},
719 {"help", no_argument, NULL, 'h'}, 1555 {"help", no_argument, NULL, 'h'},
720 {"version", no_argument, NULL, 'V'}, 1556 {"version", no_argument, NULL, 'V'},
721 {NULL, no_argument, NULL, 0x0} 1557 {NULL, no_argument, NULL, 0x0}
722}; 1558};
723 1559
724static char *opts_help[] = { 1560static const char *opts_help[] = {
725 "Scan all directories in PATH environment", 1561 "Scan all directories in PATH environment",
726 "Scan all directories in /etc/ld.so.conf", 1562 "Scan all directories in /etc/ld.so.conf",
727 "Scan directories recursively", 1563 "Scan directories recursively",
728 "Don't recursively cross mount points", 1564 "Don't recursively cross mount points",
729 "Don't scan symlinks\n", 1565 "Don't scan symlinks",
1566 "Scan archives (.a files)",
1567 "Utilize ld.so.cache information (use with -r/-n)",
1568 "Try and 'fix' bad things (use with -r/-e)",
1569 "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
730 "Print PaX markings", 1570 "Print PaX markings",
731 "Print GNU_STACK markings", 1571 "Print GNU_STACK/PT_LOAD markings",
732 "Print TEXTREL information", 1572 "Print TEXTREL information",
733 "Print RPATH information", 1573 "Print RPATH information",
734 "Print NEEDED information", 1574 "Print NEEDED information",
735 "Print INTERP information", 1575 "Print INTERP information",
736 "Print BIND information", 1576 "Print BIND information",
1577 "Print SONAME information",
737 "Find a specified symbol", 1578 "Find a specified symbol",
1579 "Find a specified section",
1580 "Find a specified library",
1581 "Use strncmp to match libraries. (use with -N)",
1582 "Locate cause of TEXTREL",
1583 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1584 "Print only ELF files matching numeric bits",
738 "Print all scanned info (-x -e -t -r -n -i -b)\n", 1585 "Print all scanned info (-x -e -t -r -b)\n",
739 "Only output 'bad' things", 1586 "Only output 'bad' things",
740 "Be verbose (can be specified more than once)", 1587 "Be verbose (can be specified more than once)",
741 "Use specified format for output", 1588 "Use specified format for output",
742 "Read input stream from a filename", 1589 "Read input stream from a filename",
743 "Write output stream to a filename", 1590 "Write output stream to a filename",
750/* display usage and exit */ 1597/* display usage and exit */
751static void usage(int status) 1598static void usage(int status)
752{ 1599{
753 unsigned long i; 1600 unsigned long i;
754 printf("* Scan ELF binaries for stuff\n\n" 1601 printf("* Scan ELF binaries for stuff\n\n"
755 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 1602 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
756 printf("Options: -[%s]\n", PARSE_FLAGS); 1603 printf("Options: -[%s]\n", PARSE_FLAGS);
757 for (i = 0; long_opts[i].name; ++i) 1604 for (i = 0; long_opts[i].name; ++i)
758 if (long_opts[i].has_arg == no_argument) 1605 if (long_opts[i].has_arg == no_argument)
759 printf(" -%c, --%-13s* %s\n", long_opts[i].val, 1606 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
760 long_opts[i].name, opts_help[i]); 1607 long_opts[i].name, opts_help[i]);
761 else 1608 else
762 printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val, 1609 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
763 long_opts[i].name, opts_help[i]); 1610 long_opts[i].name, opts_help[i]);
764 1611
765 if (status != EXIT_SUCCESS) 1612 if (status != EXIT_SUCCESS)
766 exit(status); 1613 exit(status);
767 1614
768 puts("\nThe format modifiers for the -F option are:"); 1615 puts("\nThe format modifiers for the -F option are:");
769 puts(" %F Filename \t%x PaX Flags \t%e STACK/RELRO"); 1616 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
770 puts(" %t TEXTREL \t%r RPATH \t%n NEEDED"); 1617 puts(" t TEXTREL \tr RPATH \tn NEEDED");
771 puts(" %i INTERP \t%b BIND \t%s symbol"); 1618 puts(" i INTERP \tb BIND \ts symbol");
1619 puts(" N library \to Type \tT TEXTRELs");
1620 puts(" S SONAME \tk section");
1621 puts(" p filename (with search path removed)");
1622 puts(" f filename (short name/basename)");
1623 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1624
1625 puts("\nELF Etypes:");
1626 print_etypes(stdout);
772 1627
773 exit(status); 1628 exit(status);
774} 1629}
775 1630
776/* parse command line arguments and preform needed actions */ 1631/* parse command line arguments and preform needed actions */
777static void parseargs(int argc, char *argv[]) 1632static void parseargs(int argc, char *argv[])
778{ 1633{
779 int i; 1634 int i;
780 char *from_file = NULL; 1635 const char *from_file = NULL;
781 1636
782 opterr = 0; 1637 opterr = 0;
783 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 1638 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
784 switch (i) { 1639 switch (i) {
785 1640
786 case 'V': 1641 case 'V':
787 printf("%s compiled %s\n%s\n" 1642 printf("pax-utils-%s: %s compiled %s\n%s\n"
788 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 1643 "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
789 __FILE__, __DATE__, rcsid, argv0); 1644 VERSION, __FILE__, __DATE__, rcsid, argv0);
790 exit(EXIT_SUCCESS); 1645 exit(EXIT_SUCCESS);
791 break; 1646 break;
792 case 'h': usage(EXIT_SUCCESS); break; 1647 case 'h': usage(EXIT_SUCCESS); break;
793 case 'f': 1648 case 'f':
794 if (from_file == NULL) 1649 if (from_file) warn("You prob don't want to specify -f twice");
795 from_file = xstrdup(optarg); 1650 from_file = optarg;
796 else 1651 break;
797 err("Don't specify -f twice"); 1652 case 'E':
1653 strncpy(match_etypes, optarg, sizeof(match_etypes));
1654 break;
1655 case 'M':
1656 match_bits = atoi(optarg);
798 break; 1657 break;
799 case 'o': { 1658 case 'o': {
800 FILE *fp = NULL;
801 fp = freopen(optarg, "w", stdout); 1659 if (freopen(optarg, "w", stdout) == NULL)
802 if (fp == NULL)
803 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1660 err("Could not open output stream '%s': %s", optarg, strerror(errno));
804 stdout = fp;
805 break; 1661 break;
806 } 1662 }
807 1663 case 'k':
1664 if (find_section) warn("You prob don't want to specify -k twice");
1665 find_section = optarg;
1666 break;
808 case 's': { 1667 case 's': {
809 size_t len; 1668 if (find_sym) warn("You prob don't want to specify -s twice");
810 if (!find_sym)
811 err("Don't specify -s twice");
812 find_sym = xstrdup(optarg); 1669 find_sym = optarg;
813 len = strlen(find_sym) + 1;
814 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1)); 1670 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
815 sprintf(versioned_symname, "%s@", find_sym); 1671 sprintf(versioned_symname, "%s@", find_sym);
816 break; 1672 break;
817 } 1673 }
1674 case 'N': {
1675 if (find_lib) warn("You prob don't want to specify -N twice");
1676 find_lib = optarg;
1677 break;
1678 }
818 1679
819 case 'F': { 1680 case 'F': {
820 if (!out_format) 1681 if (out_format) warn("You prob don't want to specify -F twice");
821 out_format = xstrdup(optarg); 1682 out_format = optarg;
822 else 1683 break;
823 err("Don't specify -F twice"); 1684 }
1685 case 'z': {
1686 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1687 size_t x;
1688
1689 for (x = 0 ; x < strlen(optarg); x++) {
1690 switch(optarg[x]) {
1691 case 'p':
1692 case 'P':
1693 do_state(optarg[x], PAGEEXEC);
824 break; 1694 break;
1695 case 's':
1696 case 'S':
1697 do_state(optarg[x], SEGMEXEC);
1698 break;
1699 case 'm':
1700 case 'M':
1701 do_state(optarg[x], MPROTECT);
1702 break;
1703 case 'e':
1704 case 'E':
1705 do_state(optarg[x], EMUTRAMP);
1706 break;
1707 case 'r':
1708 case 'R':
1709 do_state(optarg[x], RANDMMAP);
1710 break;
1711 case 'x':
1712 case 'X':
1713 do_state(optarg[x], RANDEXEC);
1714 break;
1715 default:
1716 break;
1717 }
825 } 1718 }
826 1719 if (!(((flags & PF_PAGEEXEC) && (flags & PF_NOPAGEEXEC)) ||
1720 ((flags & PF_SEGMEXEC) && (flags & PF_NOSEGMEXEC)) ||
1721 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)) ||
1722 ((flags & PF_RANDEXEC) && (flags & PF_NORANDEXEC)) ||
1723 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1724 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1725 setpax = flags;
1726 break;
1727 }
1728 case 'g': gmatch = 1; break;
1729 case 'L': use_ldcache = 1; break;
827 case 'y': scan_symlink = 0; break; 1730 case 'y': scan_symlink = 0; break;
1731 case 'A': scan_archives = 1; break;
828 case 'B': show_banner = 0; break; 1732 case 'B': show_banner = 0; break;
829 case 'l': scan_ldpath = 1; break; 1733 case 'l': scan_ldpath = 1; break;
830 case 'p': scan_envpath = 1; break; 1734 case 'p': scan_envpath = 1; break;
831 case 'R': dir_recurse = 1; break; 1735 case 'R': dir_recurse = 1; break;
832 case 'm': dir_crossmount = 0; break; 1736 case 'm': dir_crossmount = 0; break;
1737 case 'X': ++fix_elf; break;
833 case 'x': show_pax = 1; break; 1738 case 'x': show_pax = 1; break;
834 case 'e': show_stack = 1; break; 1739 case 'e': show_phdr = 1; break;
835 case 't': show_textrel = 1; break; 1740 case 't': show_textrel = 1; break;
836 case 'r': show_rpath = 1; break; 1741 case 'r': show_rpath = 1; break;
837 case 'n': show_needed = 1; break; 1742 case 'n': show_needed = 1; break;
838 case 'i': show_interp = 1; break; 1743 case 'i': show_interp = 1; break;
839 case 'b': show_bind = 1; break; 1744 case 'b': show_bind = 1; break;
1745 case 'S': show_soname = 1; break;
1746 case 'T': show_textrels = 1; break;
840 case 'q': be_quiet = 1; break; 1747 case 'q': be_quiet = 1; break;
841 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1748 case 'v': be_verbose = (be_verbose % 20) + 1; break;
842 case 'a': show_pax = show_stack = show_textrel = show_rpath = \ 1749 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break;
843 show_needed = show_interp = show_bind = 1; break;
844 1750
845 case ':': 1751 case ':':
846 err("Option missing parameter\n"); 1752 err("Option '%c' is missing parameter", optopt);
847 case '?': 1753 case '?':
848 err("Unknown option\n"); 1754 err("Unknown option '%c' or argument missing", optopt);
849 default: 1755 default:
850 err("Unhandled option '%c'", i); 1756 err("Unhandled option '%c'; please report this", i);
851 } 1757 }
852 } 1758 }
853 1759
854 /* let the format option override all other options */ 1760 /* let the format option override all other options */
855 if (out_format) { 1761 if (out_format) {
856 show_pax = show_stack = show_textrel = show_rpath = \ 1762 show_pax = show_phdr = show_textrel = show_rpath = \
857 show_needed = show_interp = show_bind = 0; 1763 show_needed = show_interp = show_bind = show_soname = \
1764 show_textrels = 0;
858 for (i = 0; out_format[i]; ++i) { 1765 for (i = 0; out_format[i]; ++i) {
859 if (out_format[i] != '%') continue; 1766 if (!IS_MODIFIER(out_format[i])) continue;
860 1767
861 switch (out_format[++i]) { 1768 switch (out_format[++i]) {
1769 case '+': break;
862 case '%': break; 1770 case '%': break;
1771 case '#': break;
863 case 'F': break; 1772 case 'F': break;
1773 case 'p': break;
1774 case 'f': break;
1775 case 'k': break;
864 case 's': break; 1776 case 's': break;
1777 case 'N': break;
865 case 'o': break; 1778 case 'o': break;
866 case 'x': show_pax = 1; break; 1779 case 'x': show_pax = 1; break;
867 case 'e': show_stack = 1; break; 1780 case 'e': show_phdr = 1; break;
868 case 't': show_textrel = 1; break; 1781 case 't': show_textrel = 1; break;
869 case 'r': show_rpath = 1; break; 1782 case 'r': show_rpath = 1; break;
870 case 'n': show_needed = 1; break; 1783 case 'n': show_needed = 1; break;
871 case 'i': show_interp = 1; break; 1784 case 'i': show_interp = 1; break;
872 case 'b': show_bind = 1; break; 1785 case 'b': show_bind = 1; break;
1786 case 'S': show_soname = 1; break;
1787 case 'T': show_textrels = 1; break;
873 default: 1788 default:
874 err("Invalid format specifier '%c' (byte %i)", 1789 err("Invalid format specifier '%c' (byte %i)",
875 out_format[i], i+1); 1790 out_format[i], i+1);
876 } 1791 }
877 } 1792 }
878 1793
879 /* construct our default format */ 1794 /* construct our default format */
880 } else { 1795 } else {
881 size_t fmt_len = 30; 1796 size_t fmt_len = 30;
882 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 1797 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
883 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 1798 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
884 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 1799 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
885 if (show_stack) xstrcat(&out_format, "%e ", &fmt_len); 1800 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
886 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 1801 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
887 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 1802 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
888 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 1803 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
889 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 1804 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
890 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len); 1805 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1806 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1807 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
891 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len); 1808 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1809 if (find_section) xstrcat(&out_format, "%k ", &fmt_len);
1810 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
892 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 1811 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
893 } 1812 }
894 if (be_verbose > 2) printf("Format: %s\n", out_format); 1813 if (be_verbose > 2) printf("Format: %s\n", out_format);
895 1814
896 /* now lets actually do the scanning */ 1815 /* now lets actually do the scanning */
897 if (scan_ldpath || (show_rpath && be_quiet)) 1816 if (scan_ldpath || use_ldcache)
898 load_ld_so_conf(); 1817#if defined(__GLIBC__) || defined(__UCLIBC__)
1818 load_ld_so_conf(0, "/etc/ld.so.conf");
1819#elif defined(__FreeBSD__) || defined(__DragonFly__)
1820 load_ld_so_hints(0, _PATH_ELF_HINTS);
1821#endif
899 if (scan_ldpath) scanelf_ldpath(); 1822 if (scan_ldpath) scanelf_ldpath();
900 if (scan_envpath) scanelf_envpath(); 1823 if (scan_envpath) scanelf_envpath();
1824 if (!from_file && optind == argc && ttyname(0) == NULL)
1825 from_file = "-";
901 if (from_file) { 1826 if (from_file) {
902 scanelf_from_file(from_file); 1827 scanelf_from_file(from_file);
903 free(from_file);
904 from_file = *argv; 1828 from_file = *argv;
905 } 1829 }
906 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1830 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
907 err("Nothing to scan !?"); 1831 err("Nothing to scan !?");
908 while (optind < argc) 1832 while (optind < argc) {
909 scanelf_dir(argv[optind++]); 1833 search_path = argv[optind++];
1834 scanelf_dir(search_path);
1835 }
910 1836
911 /* clean up */ 1837 /* clean up */
912 if (find_sym) { 1838 if (versioned_symname) free(versioned_symname);
913 free(find_sym);
914 free(versioned_symname);
915 }
916 if (out_format) free(out_format);
917 for (i = 0; ldpaths[i]; ++i) 1839 for (i = 0; ldpaths[i]; ++i)
918 free(ldpaths[i]); 1840 free(ldpaths[i]);
919}
920 1841
921 1842 if (ldcache != 0)
922 1843 munmap(ldcache, ldcache_size);
923/* utility funcs */
924static char *xstrdup(const char *s)
925{
926 char *ret = strdup(s);
927 if (!ret) err("Could not strdup(): %s", strerror(errno));
928 return ret;
929} 1844}
930 1845
931static void *xmalloc(size_t size) 1846static char **get_split_env(const char *envvar) {
932{ 1847 char **envvals = NULL;
933 void *ret = malloc(size); 1848 char *saveptr = NULL;
934 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size); 1849 char *env;
935 return ret; 1850 char *s;
936} 1851 int nentry;
937 1852
938static void xstrcat(char **dst, const char *src, size_t *curr_len) 1853 if ((env = getenv(envvar)) == NULL)
939{ 1854 return NULL;
940 long new_len;
941 1855
942 new_len = strlen(*dst) + strlen(src); 1856 env = xstrdup(env);
943 if (*curr_len <= new_len) { 1857 if (env == NULL)
944 *curr_len = new_len + (*curr_len / 2); 1858 return NULL;
945 *dst = realloc(*dst, *curr_len);
946 if (!*dst)
947 err("could not realloc %li bytes", (unsigned long)*curr_len);
948 }
949 1859
950 strcat(*dst, src); 1860 nentry = 0;
951} 1861 for (s = strtok_r(env, " \t\n", &saveptr); s != NULL; s = strtok_r(NULL, " \t\n", &saveptr)) {
1862 if ((envvals = xrealloc(envvals, sizeof(char *)*(nentry+1))) == NULL)
1863 return NULL;
1864 envvals[nentry++] = s;
1865 }
1866 envvals[nentry] = NULL;
952 1867
953static inline void xchrcat(char **dst, const char append, size_t *curr_len) 1868 return envvals;
954{
955 static char my_app[2];
956 my_app[0] = append;
957 my_app[1] = '\0';
958 xstrcat(dst, my_app, curr_len);
959} 1869}
1870
1871static void parseenv() {
1872 qa_textrels=get_split_env("QA_TEXTRELS");
1873 qa_execstack=get_split_env("QA_EXECSTACK");
1874 qa_wx_load=get_split_env("QA_WX_LOAD");
1875}
1876
960 1877
961 1878
962int main(int argc, char *argv[]) 1879int main(int argc, char *argv[])
963{ 1880{
964 if (argc < 2) 1881 if (argc < 2)
965 usage(EXIT_FAILURE); 1882 usage(EXIT_FAILURE);
1883 parseenv();
966 parseargs(argc, argv); 1884 parseargs(argc, argv);
967 fclose(stdout); 1885 fclose(stdout);
968#ifdef __BOUNDS_CHECKING_ON 1886#ifdef __BOUNDS_CHECKING_ON
969 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()"); 1887 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()");
970#endif 1888#endif
971 return EXIT_SUCCESS; 1889 return EXIT_SUCCESS;
972} 1890}

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