/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.102 Revision 1.188
1/* 1/*
2 * Copyright 2003-2006 Gentoo Foundation 2 * Copyright 2003-2007 Gentoo Foundation
3 * Distributed under the terms of the GNU General Public License v2 3 * Distributed under the terms of the GNU General Public License v2
4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.102 2006/01/11 01:12:12 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.188 2007/08/31 17:45:24 solar Exp $
5 * 5 *
6 * Copyright 2003-2006 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2006 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10static const char *rcsid = "$Id: scanelf.c,v 1.188 2007/08/31 17:45:24 solar Exp $";
11const char * const argv0 = "scanelf";
12
10#include "paxinc.h" 13#include "paxinc.h"
11 14
12static const char *rcsid = "$Id: scanelf.c,v 1.102 2006/01/11 01:12:12 vapier Exp $";
13#define argv0 "scanelf"
14
15#define IS_MODIFIER(c) (c == '%' || c == '#') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
16
17
18 16
19/* prototypes */ 17/* prototypes */
20static 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);
21static void scanelf_dir(const char *path); 23static int scanelf_dir(const char *path);
22static void scanelf_ldpath(); 24static void scanelf_ldpath(void);
23static void scanelf_envpath(); 25static void scanelf_envpath(void);
24static void usage(int status); 26static void usage(int status);
27static char **get_split_env(const char *envvar);
28static void parseenv(void);
25static void parseargs(int argc, char *argv[]); 29static int parseargs(int argc, char *argv[]);
26static char *xstrdup(const char *s); 30static int rematch(const char *regex, const char *match, int cflags);
27static void *xmalloc(size_t size);
28static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
29#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
30static inline void xchrcat(char **dst, const char append, size_t *curr_len);
31 31
32/* variables to control behavior */ 32/* variables to control behavior */
33static char match_etypes[126] = "";
33static char *ldpaths[256]; 34static char *ldpaths[256];
34static char scan_ldpath = 0; 35static char scan_ldpath = 0;
35static char scan_envpath = 0; 36static char scan_envpath = 0;
36static char scan_symlink = 1; 37static char scan_symlink = 1;
38static char scan_archives = 0;
37static char dir_recurse = 0; 39static char dir_recurse = 0;
38static char dir_crossmount = 1; 40static char dir_crossmount = 1;
39static char show_pax = 0; 41static char show_pax = 0;
42static char show_perms = 0;
40static char show_phdr = 0; 43static char show_phdr = 0;
41static char show_textrel = 0; 44static char show_textrel = 0;
42static char show_rpath = 0; 45static char show_rpath = 0;
43static char show_needed = 0; 46static char show_needed = 0;
44static char show_interp = 0; 47static char show_interp = 0;
45static char show_bind = 0; 48static char show_bind = 0;
46static char show_soname = 0; 49static char show_soname = 0;
47static char show_textrels = 0; 50static char show_textrels = 0;
48static char show_banner = 1; 51static char show_banner = 1;
52static char show_endian = 0;
49static char be_quiet = 0; 53static char be_quiet = 0;
50static char be_verbose = 0; 54static char be_verbose = 0;
51static char be_wewy_wewy_quiet = 0; 55static char be_wewy_wewy_quiet = 0;
56static char be_semi_verbose = 0;
52static char *find_sym = NULL, *versioned_symname = NULL; 57static char *find_sym = NULL, *versioned_symname = NULL;
53static char *find_lib = NULL; 58static char *find_lib = NULL;
59static char *find_section = NULL;
54static char *out_format = NULL; 60static char *out_format = NULL;
55static char *search_path = NULL; 61static char *search_path = NULL;
56static char fix_elf = 0; 62static char fix_elf = 0;
57static char gmatch = 0; 63static char g_match = 0;
58static char use_ldcache = 0; 64static char use_ldcache = 0;
59 65
66static char **qa_textrels = NULL;
67static char **qa_execstack = NULL;
68static char **qa_wx_load = NULL;
60 69
70int match_bits = 0;
71unsigned int match_perms = 0;
61caddr_t ldcache = 0; 72caddr_t ldcache = 0;
62size_t ldcache_size = 0; 73size_t ldcache_size = 0;
74unsigned long setpax = 0UL;
75
76int has_objdump = 0;
77
78static char *getstr_perms(const char *fname);
79static char *getstr_perms(const char *fname)
80{
81 struct stat st;
82 static char buf[8];
83
84 if ((stat(fname, &st)) == (-1))
85 return (char *) "";
86
87 snprintf(buf, sizeof(buf), "%o", st.st_mode);
88
89 return (char *) buf + 2;
90}
91
92/* find the path to a file by name */
93static char *which(const char *fname)
94{
95 static char fullpath[BUFSIZ];
96 char *path, *p;
97
98 path = getenv("PATH");
99 if (!path)
100 return NULL;
101
102 path = xstrdup(path);
103 while ((p = strrchr(path, ':')) != NULL) {
104 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
105 *p = 0;
106 if (access(fullpath, R_OK) != (-1)) {
107 free(path);
108 return (char *) fullpath;
109 }
110 }
111 free(path);
112 return NULL;
113}
114
115/* 1 on failure. 0 otherwise */
116static int rematch(const char *regex, const char *match, int cflags)
117{
118 regex_t preg;
119 int ret;
120
121 if ((match == NULL) || (regex == NULL))
122 return EXIT_FAILURE;
123
124
125 if ((ret = regcomp(&preg, regex, cflags))) {
126 char err[256];
127
128 if (regerror(ret, &preg, err, sizeof(err)))
129 fprintf(stderr, "regcomp failed: %s", err);
130 else
131 fprintf(stderr, "regcomp failed");
132
133 return EXIT_FAILURE;
134 }
135 ret = regexec(&preg, match, 0, NULL, 0);
136 regfree(&preg);
137
138 return ret;
139}
63 140
64/* sub-funcs for scanelf_file() */ 141/* sub-funcs for scanelf_file() */
65static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 142static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
66{ 143{
67 /* find the best SHT_DYNSYM and SHT_STRTAB sections */ 144 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
86 } \ 163 } \
87 } 164 }
88 GET_SYMTABS(32) 165 GET_SYMTABS(32)
89 GET_SYMTABS(64) 166 GET_SYMTABS(64)
90} 167}
168
91static char *scanelf_file_pax(elfobj *elf, char *found_pax) 169static char *scanelf_file_pax(elfobj *elf, char *found_pax)
92{ 170{
93 static char ret[7]; 171 static char ret[7];
94 unsigned long i, shown; 172 unsigned long i, shown;
95 173
104 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 182 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
105 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 183 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
106 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 184 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
107 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \ 185 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \
108 continue; \ 186 continue; \
109 if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \ 187 if (fix_elf && setpax) { \
188 /* set the paxctl flags */ \
189 ESET(phdr[i].p_flags, setpax); \
190 } \
191 if (be_quiet && (EGET(phdr[i].p_flags) == (PF_NOEMUTRAMP | PF_NORANDEXEC))) \
110 continue; \ 192 continue; \
111 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \ 193 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \
112 *found_pax = 1; \ 194 *found_pax = 1; \
113 ++shown; \ 195 ++shown; \
114 break; \ 196 break; \
115 } \ 197 } \
116 } 198 }
117 SHOW_PAX(32) 199 SHOW_PAX(32)
118 SHOW_PAX(64) 200 SHOW_PAX(64)
201 }
202
203
204 if (fix_elf && setpax) {
205 /* set the chpax settings */
206 if (elf->elf_class == ELFCLASS32) {
207 if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC)
208 ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
209 } else {
210 if (EHDR64(elf->ehdr)->e_type == ET_DYN || EHDR64(elf->ehdr)->e_type == ET_EXEC)
211 ESET(EHDR64(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
212 }
119 } 213 }
120 214
121 /* fall back to EI_PAX if no PT_PAX was found */ 215 /* fall back to EI_PAX if no PT_PAX was found */
122 if (!*ret) { 216 if (!*ret) {
123 static char *paxflags; 217 static char *paxflags;
148 242
149 shown = 0; 243 shown = 0;
150 multi_stack = multi_relro = multi_load = 0; 244 multi_stack = multi_relro = multi_load = 0;
151 max_pt_load = elf_max_pt_load(elf); 245 max_pt_load = elf_max_pt_load(elf);
152 246
247#define NOTE_GNU_STACK ".note.GNU-stack"
153#define SHOW_PHDR(B) \ 248#define SHOW_PHDR(B) \
154 if (elf->elf_class == ELFCLASS ## B) { \ 249 if (elf->elf_class == ELFCLASS ## B) { \
155 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 250 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
156 Elf ## B ## _Off offset; \ 251 Elf ## B ## _Off offset; \
157 uint32_t flags, check_flags; \ 252 uint32_t flags, check_flags; \
158 if (elf->phdr != NULL) { \ 253 if (elf->phdr != NULL) { \
159 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 254 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
160 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \ 255 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
161 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 256 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
257 if (multi_stack++) \
162 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ 258 warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
259 if (file_matches_list(elf->filename, qa_execstack)) \
260 continue; \
163 found = found_phdr; \ 261 found = found_phdr; \
164 offset = 0; \ 262 offset = 0; \
165 check_flags = PF_X; \ 263 check_flags = PF_X; \
166 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \ 264 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
265 if (multi_relro++) \
167 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 266 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
168 found = found_relro; \ 267 found = found_relro; \
169 offset = 4; \ 268 offset = 4; \
170 check_flags = PF_X; \ 269 check_flags = PF_X; \
171 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 270 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
271 if (EGET(ehdr->e_type) == ET_DYN || EGET(ehdr->e_type) == ET_EXEC) \
272 if (multi_load++ > max_pt_load) \
172 if (multi_load++ > max_pt_load) warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \ 273 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
274 if (file_matches_list(elf->filename, qa_wx_load)) \
275 continue; \
173 found = found_load; \ 276 found = found_load; \
174 offset = 8; \ 277 offset = 8; \
175 check_flags = PF_W|PF_X; \ 278 check_flags = PF_W|PF_X; \
176 } else \ 279 } else \
177 continue; \ 280 continue; \
178 flags = EGET(phdr[i].p_flags); \ 281 flags = EGET(phdr[i].p_flags); \
179 if (be_quiet && ((flags & check_flags) != check_flags)) \ 282 if (be_quiet && ((flags & check_flags) != check_flags)) \
180 continue; \ 283 continue; \
181 if (fix_elf && ((flags & PF_X) != flags)) { \ 284 if ((EGET(phdr[i].p_type) != PT_LOAD) && (fix_elf && ((flags & PF_X) != flags))) { \
182 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \ 285 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \
183 ret[3] = ret[7] = '!'; \ 286 ret[3] = ret[7] = '!'; \
184 flags = EGET(phdr[i].p_flags); \ 287 flags = EGET(phdr[i].p_flags); \
185 } \ 288 } \
186 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \ 289 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
189 } \ 292 } \
190 } else if (elf->shdr != NULL) { \ 293 } else if (elf->shdr != NULL) { \
191 /* no program headers which means this is prob an object file */ \ 294 /* no program headers which means this is prob an object file */ \
192 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 295 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
193 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 296 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
297 char *str; \
298 if ((void*)strtbl > (void*)elf->data_end) \
299 goto skip_this_shdr##B; \
194 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 300 check_flags = SHF_WRITE|SHF_EXECINSTR; \
195 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 301 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
196 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 302 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
197 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 303 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
198 if (!strcmp((char*)(elf->data + offset), ".note.GNU-stack")) { \ 304 str = elf->data + offset; \
305 if (str > elf->data + offset + sizeof(NOTE_GNU_STACK)) continue; \
306 if (!strcmp(str, NOTE_GNU_STACK)) { \
199 if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \ 307 if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \
200 flags = EGET(shdr[i].sh_flags); \ 308 flags = EGET(shdr[i].sh_flags); \
201 if (be_quiet && ((flags & check_flags) != check_flags)) \ 309 if (be_quiet && ((flags & check_flags) != check_flags)) \
202 continue; \ 310 continue; \
203 ++*found_phdr; \ 311 ++*found_phdr; \
207 if (flags & SHF_EXECINSTR) ret[2] = 'X'; \ 315 if (flags & SHF_EXECINSTR) ret[2] = 'X'; \
208 if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \ 316 if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \
209 break; \ 317 break; \
210 } \ 318 } \
211 } \ 319 } \
320 skip_this_shdr##B: \
212 if (!multi_stack) { \ 321 if (!multi_stack) { \
322 if (file_matches_list(elf->filename, qa_execstack)) \
323 return NULL; \
213 *found_phdr = 1; \ 324 *found_phdr = 1; \
214 shown = 1; \ 325 shown = 1; \
215 memcpy(ret, "!WX", 3); \ 326 memcpy(ret, "!WX", 3); \
216 } \ 327 } \
217 } \ 328 } \
222 if (be_wewy_wewy_quiet || (be_quiet && !shown)) 333 if (be_wewy_wewy_quiet || (be_quiet && !shown))
223 return NULL; 334 return NULL;
224 else 335 else
225 return ret; 336 return ret;
226} 337}
338
339/*
340 * See if this ELF contains a DT_TEXTREL tag in any of its
341 * PT_DYNAMIC sections.
342 */
227static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 343static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
228{ 344{
229 static const char *ret = "TEXTREL"; 345 static const char *ret = "TEXTREL";
230 unsigned long i; 346 unsigned long i;
231 347
232 if (!show_textrel && !show_textrels) return NULL; 348 if (!show_textrel && !show_textrels) return NULL;
349
350 if (file_matches_list(elf->filename, qa_textrels)) return NULL;
233 351
234 if (elf->phdr) { 352 if (elf->phdr) {
235#define SHOW_TEXTREL(B) \ 353#define SHOW_TEXTREL(B) \
236 if (elf->elf_class == ELFCLASS ## B) { \ 354 if (elf->elf_class == ELFCLASS ## B) { \
237 Elf ## B ## _Dyn *dyn; \ 355 Elf ## B ## _Dyn *dyn; \
238 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 356 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
239 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 357 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
240 Elf ## B ## _Off offset; \ 358 Elf ## B ## _Off offset; \
241 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 359 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
242 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 360 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
243 offset = EGET(phdr[i].p_offset); \ 361 offset = EGET(phdr[i].p_offset); \
244 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 362 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
245 dyn = DYN ## B (elf->data + offset); \ 363 dyn = DYN ## B (elf->data + offset); \
246 while (EGET(dyn->d_tag) != DT_NULL) { \ 364 while (EGET(dyn->d_tag) != DT_NULL) { \
247 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 365 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
259 if (be_quiet || be_wewy_wewy_quiet) 377 if (be_quiet || be_wewy_wewy_quiet)
260 return NULL; 378 return NULL;
261 else 379 else
262 return " - "; 380 return " - ";
263} 381}
382
383/*
384 * Scan the .text section to see if there are any relocations in it.
385 * Should rewrite this to check PT_LOAD sections that are marked
386 * Executable rather than the section named '.text'.
387 */
264static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) 388static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
265{ 389{
266 unsigned long s, r, rmax; 390 unsigned long s, r, rmax;
267 void *symtab_void, *strtab_void, *text_void; 391 void *symtab_void, *strtab_void, *text_void;
268 392
320 if (be_verbose <= 2) continue; \ 444 if (be_verbose <= 2) continue; \
321 } else \ 445 } else \
322 *found_textrels = 1; \ 446 *found_textrels = 1; \
323 /* locate this relocation symbol name */ \ 447 /* locate this relocation symbol name */ \
324 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
449 if ((void*)sym > (void*)elf->data_end) { \
450 warn("%s: corrupt ELF symbol", elf->filename); \
451 continue; \
452 } \
325 sym_max = ELF ## B ## _R_SYM(r_info); \ 453 sym_max = ELF ## B ## _R_SYM(r_info); \
326 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 454 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
327 sym += sym_max; \ 455 sym += sym_max; \
328 else \ 456 else \
329 sym = NULL; \ 457 sym = NULL; \
331 /* show the raw details about this reloc */ \ 459 /* show the raw details about this reloc */ \
332 printf(" %s: ", elf->base_filename); \ 460 printf(" %s: ", elf->base_filename); \
333 if (sym && sym->st_name) \ 461 if (sym && sym->st_name) \
334 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \ 462 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \
335 else \ 463 else \
336 printf("(memory/fake?)"); \ 464 printf("(memory/data?)"); \
337 printf(" [0x%lX]", (unsigned long)r_offset); \ 465 printf(" [0x%lX]", (unsigned long)r_offset); \
338 /* now try to find the closest symbol that this rel is probably in */ \ 466 /* now try to find the closest symbol that this rel is probably in */ \
339 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 467 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
340 func = NULL; \ 468 func = NULL; \
341 offset_tmp = 0; \ 469 offset_tmp = 0; \
345 offset_tmp = EGET(sym->st_value); \ 473 offset_tmp = EGET(sym->st_value); \
346 } \ 474 } \
347 ++sym; \ 475 ++sym; \
348 } \ 476 } \
349 printf(" in "); \ 477 printf(" in "); \
350 if (func && func->st_name) \ 478 if (func && func->st_name) { \
351 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \ 479 const char *func_name = elf->data + EGET(strtab->sh_offset) + EGET(func->st_name); \
480 if (r_offset > EGET(func->st_size)) \
481 printf("(optimized out: previous %s)", func_name); \
352 else \ 482 else \
353 printf("(NULL: fake?)"); \ 483 printf("%s", func_name); \
484 } else \
485 printf("(optimized out)"); \
354 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 486 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
487 if (be_verbose && has_objdump) { \
488 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
489 char *sysbuf; \
490 size_t syslen; \
491 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"; \
492 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
493 sysbuf = xmalloc(syslen); \
494 if (end_addr < r_offset) \
495 /* not uncommon when things are optimized out */ \
496 end_addr = r_offset + 0x100; \
497 snprintf(sysbuf, syslen, sysfmt, \
498 (unsigned long)offset_tmp, \
499 (unsigned long)end_addr, \
500 elf->filename, \
501 (unsigned long)r_offset); \
502 fflush(stdout); \
503 system(sysbuf); \
504 fflush(stdout); \
505 free(sysbuf); \
506 } \
355 } \ 507 } \
356 } } 508 } }
357 SHOW_TEXTRELS(32) 509 SHOW_TEXTRELS(32)
358 SHOW_TEXTRELS(64) 510 SHOW_TEXTRELS(64)
359 } 511 }
377 warnf("Security problem NULL %s in %s", dt_type, elf->filename); 529 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
378 break; 530 break;
379 case '$': 531 case '$':
380 if (fstat(elf->fd, &st) != -1) 532 if (fstat(elf->fd, &st) != -1)
381 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 533 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
382 warnf("Security problem with %s='%s' in %s with mode set of %o", 534 warnf("Security problem with %s='%s' in %s with mode set of %o",
383 dt_type, item, elf->filename, st.st_mode & 07777); 535 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
384 break; 536 break;
385 default: 537 default:
386 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename); 538 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
387 break; 539 break;
388 } 540 }
408 Elf ## B ## _Off offset; \ 560 Elf ## B ## _Off offset; \
409 Elf ## B ## _Xword word; \ 561 Elf ## B ## _Xword word; \
410 /* Scan all the program headers */ \ 562 /* Scan all the program headers */ \
411 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 563 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
412 /* Just scan dynamic headers */ \ 564 /* Just scan dynamic headers */ \
413 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 565 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
414 offset = EGET(phdr[i].p_offset); \ 566 offset = EGET(phdr[i].p_offset); \
415 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 567 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
416 /* Just scan dynamic RPATH/RUNPATH headers */ \ 568 /* Just scan dynamic RPATH/RUNPATH headers */ \
417 dyn = DYN ## B (elf->data + offset); \ 569 dyn = DYN ## B (elf->data + offset); \
418 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 570 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
427 /* Verify the memory is somewhat sane */ \ 579 /* Verify the memory is somewhat sane */ \
428 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 580 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
429 if (offset < (Elf ## B ## _Off)elf->len) { \ 581 if (offset < (Elf ## B ## _Off)elf->len) { \
430 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 582 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
431 *r = (char*)(elf->data + offset); \ 583 *r = (char*)(elf->data + offset); \
584 /* cache the length in case we need to nuke this section later on */ \
585 if (fix_elf) \
586 offset = strlen(*r); \
432 /* If quiet, don't output paths in ld.so.conf */ \ 587 /* If quiet, don't output paths in ld.so.conf */ \
433 if (be_quiet) { \ 588 if (be_quiet) { \
434 size_t len; \ 589 size_t len; \
435 char *start, *end; \ 590 char *start, *end; \
436 /* note that we only 'chop' off leading known paths. */ \ 591 /* note that we only 'chop' off leading known paths. */ \
456 else \ 611 else \
457 start = start + len + 1; \ 612 start = start + len + 1; \
458 } \ 613 } \
459 } \ 614 } \
460 if (*r) { \ 615 if (*r) { \
461 if (fix_elf > 2 || **r == '\0') { \ 616 if (fix_elf > 2 || (fix_elf && **r == '\0')) { \
462 /* just nuke it */ \ 617 /* just nuke it */ \
463 nuke_it##B: \ 618 nuke_it##B: \
619 memset(*r, 0x00, offset); \
464 *r = NULL; \ 620 *r = NULL; \
465 ESET(dyn->d_tag, DT_DEBUG); \ 621 ESET(dyn->d_tag, DT_DEBUG); \
622 ESET(dyn->d_un.d_ptr, 0); \
466 } else if (fix_elf) { \ 623 } else if (fix_elf) { \
467 /* try to clean "bad" paths */ \ 624 /* try to clean "bad" paths */ \
468 size_t len, tmpdir_len; \ 625 size_t len, tmpdir_len; \
469 char *start, *end; \ 626 char *start, *end; \
470 const char *tmpdir; \ 627 const char *tmpdir; \
542#define FLAG_POWERPC_LIB64 0x0500 699#define FLAG_POWERPC_LIB64 0x0500
543#define FLAG_MIPS64_LIBN32 0x0600 700#define FLAG_MIPS64_LIBN32 0x0600
544#define FLAG_MIPS64_LIBN64 0x0700 701#define FLAG_MIPS64_LIBN64 0x0700
545 702
546static char *lookup_cache_lib(elfobj *, char *); 703static char *lookup_cache_lib(elfobj *, char *);
704
705#if defined(__GLIBC__) || defined(__UCLIBC__)
706
547static char *lookup_cache_lib(elfobj *elf, char *fname) 707static char *lookup_cache_lib(elfobj *elf, char *fname)
548{ 708{
549 int fd = 0; 709 int fd = 0;
550 char *strs; 710 char *strs;
551 static char buf[_POSIX_PATH_MAX] = ""; 711 static char buf[__PAX_UTILS_PATH_MAX] = "";
552 const char *cachefile = "/etc/ld.so.cache"; 712 const char *cachefile = "/etc/ld.so.cache";
553 struct stat st; 713 struct stat st;
554 714
555 typedef struct { 715 typedef struct {
556 char magic[LDSO_CACHE_MAGIC_LEN]; 716 char magic[LDSO_CACHE_MAGIC_LEN];
577 ldcache_size = st.st_size; 737 ldcache_size = st.st_size;
578 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 738 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
579 739
580 close(fd); 740 close(fd);
581 741
582 if (ldcache == (caddr_t)-1) 742 if (ldcache == (caddr_t)-1) {
743 ldcache = 0;
583 return NULL; 744 return NULL;
745 }
584 746
585 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN)) 747 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN))
586 return NULL; 748 return NULL;
587 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN)) 749 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
588 return NULL; 750 return NULL;
605 continue; 767 continue;
606 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 768 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
607 } 769 }
608 return buf; 770 return buf;
609} 771}
772#elif defined(__NetBSD__)
773static char *lookup_cache_lib(elfobj *elf, char *fname)
774{
775 static char buf[__PAX_UTILS_PATH_MAX] = "";
776 static struct stat st;
610 777
778 char **ldpath;
779 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) {
780 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", *ldpath, fname) >= sizeof(buf))
781 continue; /* if the pathname is too long, or something went wrong, ignore */
782
783 if (stat(buf, &st) != 0)
784 continue; /* if the lib doesn't exist in *ldpath, look further */
785
786 /* NetBSD doesn't actually do sanity checks, it just loads the file
787 * and if that doesn't work, continues looking in other directories.
788 * This cannot easily be safely emulated, unfortunately. For now,
789 * just assume that if it exists, it's a valid library. */
790
791 return buf;
792 }
793
794 /* not found in any path */
795 return NULL;
796}
797#else
798#warning Cache support not implemented for your target
799static char *lookup_cache_lib(elfobj *elf, char *fname)
800{
801 return NULL;
802}
803#endif
611 804
612static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len) 805static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
613{ 806{
614 unsigned long i; 807 unsigned long i;
615 char *needed; 808 char *needed;
627 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 820 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
628 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 821 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
629 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 822 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
630 Elf ## B ## _Off offset; \ 823 Elf ## B ## _Off offset; \
631 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 824 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
632 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 825 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
633 offset = EGET(phdr[i].p_offset); \ 826 offset = EGET(phdr[i].p_offset); \
634 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 827 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
635 dyn = DYN ## B (elf->data + offset); \ 828 dyn = DYN ## B (elf->data + offset); \
636 while (EGET(dyn->d_tag) != DT_NULL) { \ 829 while (EGET(dyn->d_tag) != DT_NULL) { \
637 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 830 if (EGET(dyn->d_tag) == DT_NEEDED) { \
649 needed = p; \ 842 needed = p; \
650 xstrcat(ret, needed, ret_len); \ 843 xstrcat(ret, needed, ret_len); \
651 } \ 844 } \
652 *found_needed = 1; \ 845 *found_needed = 1; \
653 } else { \ 846 } else { \
654 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \ 847 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \
655 *found_lib = 1; \ 848 *found_lib = 1; \
656 return (be_wewy_wewy_quiet ? NULL : needed); \ 849 return (be_wewy_wewy_quiet ? NULL : needed); \
657 } \ 850 } \
658 } \ 851 } \
659 } \ 852 } \
690} 883}
691static char *scanelf_file_bind(elfobj *elf, char *found_bind) 884static char *scanelf_file_bind(elfobj *elf, char *found_bind)
692{ 885{
693 unsigned long i; 886 unsigned long i;
694 struct stat s; 887 struct stat s;
888 char dynamic = 0;
695 889
696 if (!show_bind) return NULL; 890 if (!show_bind) return NULL;
697 if (!elf->phdr) return NULL; 891 if (!elf->phdr) return NULL;
698 892
699#define SHOW_BIND(B) \ 893#define SHOW_BIND(B) \
701 Elf ## B ## _Dyn *dyn; \ 895 Elf ## B ## _Dyn *dyn; \
702 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 896 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
703 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 897 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
704 Elf ## B ## _Off offset; \ 898 Elf ## B ## _Off offset; \
705 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 899 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
706 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 900 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
901 dynamic = 1; \
707 offset = EGET(phdr[i].p_offset); \ 902 offset = EGET(phdr[i].p_offset); \
708 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 903 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
709 dyn = DYN ## B (elf->data + offset); \ 904 dyn = DYN ## B (elf->data + offset); \
710 while (EGET(dyn->d_tag) != DT_NULL) { \ 905 while (EGET(dyn->d_tag) != DT_NULL) { \
711 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 906 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
722 SHOW_BIND(32) 917 SHOW_BIND(32)
723 SHOW_BIND(64) 918 SHOW_BIND(64)
724 919
725 if (be_wewy_wewy_quiet) return NULL; 920 if (be_wewy_wewy_quiet) return NULL;
726 921
922 /* don't output anything if quiet mode and the ELF is static or not setuid */
727 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) { 923 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
728 return NULL; 924 return NULL;
729 } else { 925 } else {
730 *found_bind = 1; 926 *found_bind = 1;
731 return (char *) "LAZY"; 927 return (char *) (dynamic ? "LAZY" : "STATIC");
732 } 928 }
733} 929}
734static char *scanelf_file_soname(elfobj *elf, char *found_soname) 930static char *scanelf_file_soname(elfobj *elf, char *found_soname)
735{ 931{
736 unsigned long i; 932 unsigned long i;
748 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 944 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
749 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 945 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
750 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 946 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
751 Elf ## B ## _Off offset; \ 947 Elf ## B ## _Off offset; \
752 /* only look for soname in shared objects */ \ 948 /* only look for soname in shared objects */ \
753 if (ehdr->e_type != ET_DYN) \ 949 if (EGET(ehdr->e_type) != ET_DYN) \
754 return NULL; \ 950 return NULL; \
755 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 951 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
756 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 952 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
757 offset = EGET(phdr[i].p_offset); \ 953 offset = EGET(phdr[i].p_offset); \
758 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 954 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
759 dyn = DYN ## B (elf->data + offset); \ 955 dyn = DYN ## B (elf->data + offset); \
760 while (EGET(dyn->d_tag) != DT_NULL) { \ 956 while (EGET(dyn->d_tag) != DT_NULL) { \
761 if (EGET(dyn->d_tag) == DT_SONAME) { \ 957 if (EGET(dyn->d_tag) == DT_SONAME) { \
775 SHOW_SONAME(64) 971 SHOW_SONAME(64)
776 } 972 }
777 973
778 return NULL; 974 return NULL;
779} 975}
976
780static char *scanelf_file_sym(elfobj *elf, char *found_sym) 977static char *scanelf_file_sym(elfobj *elf, char *found_sym)
781{ 978{
782 unsigned long i; 979 unsigned long i;
783 char *ret; 980 char *ret;
784 void *symtab_void, *strtab_void; 981 void *symtab_void, *strtab_void;
792#define FIND_SYM(B) \ 989#define FIND_SYM(B) \
793 if (elf->elf_class == ELFCLASS ## B) { \ 990 if (elf->elf_class == ELFCLASS ## B) { \
794 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 991 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
795 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 992 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
796 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 993 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
797 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 994 unsigned long cnt = EGET(symtab->sh_entsize); \
798 char *symname; \ 995 char *symname; \
996 if (cnt) \
997 cnt = EGET(symtab->sh_size) / cnt; \
799 for (i = 0; i < cnt; ++i) { \ 998 for (i = 0; i < cnt; ++i) { \
800 if (sym->st_name) { \ 999 if (sym->st_name) { \
1000 /* make sure the symbol name is in acceptable memory range */ \
801 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1001 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
802 if (*find_sym == '*') { \ 1002 if ((void*)symname > (void*)elf->data_end) { \
1003 warnf("%s: corrupt ELF symbols", elf->filename); \
1004 ++sym; \
1005 continue; \
1006 } \
1007 /* debug display ... show all symbols and some extra info */ \
1008 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \
803 printf("%s(%s) %5lX %15s %s\n", \ 1009 printf("%s(%s) %5lX %15s %s %s\n", \
804 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1010 ((*found_sym == 0) ? "\n\t" : "\t"), \
805 elf->base_filename, \ 1011 elf->base_filename, \
806 (unsigned long)sym->st_size, \ 1012 (unsigned long)sym->st_size, \
807 get_elfstttype(sym->st_info), \ 1013 get_elfstttype(sym->st_info), \
808 symname); \ 1014 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
809 *found_sym = 1; \ 1015 *found_sym = 1; \
810 } else { \ 1016 } else { \
1017 /* allow the user to specify a comma delimited list of symbols to search for */ \
811 char *this_sym, *next_sym; \ 1018 char *this_sym, *this_sym_ver, *next_sym; \
1019 this_sym = ret; \
812 this_sym = find_sym; \ 1020 this_sym_ver = versioned_symname; \
813 do { \ 1021 do { \
814 next_sym = strchr(this_sym, ','); \ 1022 next_sym = strchr(this_sym, ','); \
815 if (next_sym == NULL) \ 1023 if (next_sym == NULL) \
816 next_sym = this_sym + strlen(this_sym); \ 1024 next_sym = this_sym + strlen(this_sym); \
1025 /* do we want a defined symbol ? */ \
1026 if (*this_sym == '+') { \
1027 if (sym->st_shndx == SHN_UNDEF) \
1028 goto skip_this_sym##B; \
1029 ++this_sym; \
1030 ++this_sym_ver; \
1031 /* do we want an undefined symbol ? */ \
1032 } else if (*this_sym == '-') { \
1033 if (sym->st_shndx != SHN_UNDEF) \
1034 goto skip_this_sym##B; \
1035 ++this_sym; \
1036 ++this_sym_ver; \
1037 } \
1038 /* ok, lets compare the name now */ \
817 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \ 1039 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
818 (strcmp(symname, versioned_symname) == 0)) { \ 1040 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
1041 if (be_semi_verbose) { \
1042 char buf[126]; \
1043 snprintf(buf, sizeof(buf), "%lX %s %s", \
1044 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1045 ret = buf; \
1046 } else \
819 ret = this_sym; \ 1047 ret = this_sym; \
820 (*found_sym)++; \ 1048 (*found_sym)++; \
821 goto break_out; \ 1049 goto break_out; \
822 } \ 1050 } \
823 this_sym = next_sym + 1; \ 1051 skip_this_sym##B: this_sym = next_sym + 1; \
824 } while (*next_sym != '\0'); \ 1052 } while (*next_sym != '\0'); \
825 } \ 1053 } \
826 } \ 1054 } \
827 ++sym; \ 1055 ++sym; \
828 } } 1056 } }
838 if (be_quiet) 1066 if (be_quiet)
839 return NULL; 1067 return NULL;
840 else 1068 else
841 return (char *)" - "; 1069 return (char *)" - ";
842} 1070}
1071
1072
1073static char *scanelf_file_sections(elfobj *elf, char *found_section)
1074{
1075 if (!find_section)
1076 return NULL;
1077
1078#define FIND_SECTION(B) \
1079 if (elf->elf_class == ELFCLASS ## B) { \
1080 int invert; \
1081 Elf ## B ## _Shdr *section; \
1082 invert = (*find_section == '!' ? 1 : 0); \
1083 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \
1084 if ((section == NULL && invert) || (section != NULL && !invert)) \
1085 *found_section = 1; \
1086 }
1087 FIND_SECTION(32)
1088 FIND_SECTION(64)
1089
1090 if (be_wewy_wewy_quiet)
1091 return NULL;
1092
1093 if (*found_section)
1094 return find_section;
1095
1096 if (be_quiet)
1097 return NULL;
1098 else
1099 return (char *)" - ";
1100}
1101
843/* scan an elf file and show all the fun stuff */ 1102/* scan an elf file and show all the fun stuff */
844#define prints(str) write(fileno(stdout), str, strlen(str)) 1103#define prints(str) write(fileno(stdout), str, strlen(str))
845static void scanelf_file(const char *filename) 1104static int scanelf_elfobj(elfobj *elf)
846{ 1105{
847 unsigned long i; 1106 unsigned long i;
848 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1107 char found_pax, found_phdr, found_relro, found_load, found_textrel,
849 found_rpath, found_needed, found_interp, found_bind, found_soname, 1108 found_rpath, found_needed, found_interp, found_bind, found_soname,
850 found_sym, found_lib, found_file, found_textrels; 1109 found_sym, found_lib, found_file, found_textrels, found_section;
851 elfobj *elf;
852 struct stat st;
853 static char *out_buffer = NULL; 1110 static char *out_buffer = NULL;
854 static size_t out_len; 1111 static size_t out_len;
855 1112
856 /* make sure 'filename' exists */
857 if (lstat(filename, &st) == -1) {
858 if (be_verbose > 2) printf("%s: does not exist\n", filename);
859 return;
860 }
861 /* always handle regular files and handle symlinked files if no -y */
862 if (S_ISLNK(st.st_mode)) {
863 if (!scan_symlink) return;
864 stat(filename, &st);
865 }
866 if (!S_ISREG(st.st_mode)) {
867 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
868 return;
869 }
870
871 found_pax = found_phdr = found_relro = found_load = found_textrel = \ 1113 found_pax = found_phdr = found_relro = found_load = found_textrel = \
872 found_rpath = found_needed = found_interp = found_bind = found_soname = \ 1114 found_rpath = found_needed = found_interp = found_bind = found_soname = \
873 found_sym = found_lib = found_file = found_textrels = 0; 1115 found_sym = found_lib = found_file = found_textrels = found_section = 0;
874 1116
875 /* verify this is real ELF */
876 if ((elf = _readelf(filename, !fix_elf)) == NULL) {
877 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
878 return;
879 }
880
881 if (be_verbose > 1) 1117 if (be_verbose > 2)
882 printf("%s: scanning file {%s,%s}\n", filename, 1118 printf("%s: scanning file {%s,%s}\n", elf->filename,
883 get_elfeitype(EI_CLASS, elf->elf_class), 1119 get_elfeitype(EI_CLASS, elf->elf_class),
884 get_elfeitype(EI_DATA, elf->data[EI_DATA])); 1120 get_elfeitype(EI_DATA, elf->data[EI_DATA]));
885 else if (be_verbose) 1121 else if (be_verbose > 1)
886 printf("%s: scanning file\n", filename); 1122 printf("%s: scanning file\n", elf->filename);
887 1123
888 /* init output buffer */ 1124 /* init output buffer */
889 if (!out_buffer) { 1125 if (!out_buffer) {
890 out_len = sizeof(char) * 80; 1126 out_len = sizeof(char) * 80;
891 out_buffer = (char*)xmalloc(out_len); 1127 out_buffer = xmalloc(out_len);
892 } 1128 }
893 *out_buffer = '\0'; 1129 *out_buffer = '\0';
894 1130
895 /* show the header */ 1131 /* show the header */
896 if (!be_quiet && show_banner) { 1132 if (!be_quiet && show_banner) {
897 for (i = 0; out_format[i]; ++i) { 1133 for (i = 0; out_format[i]; ++i) {
898 if (!IS_MODIFIER(out_format[i])) continue; 1134 if (!IS_MODIFIER(out_format[i])) continue;
899 1135
900 switch (out_format[++i]) { 1136 switch (out_format[++i]) {
1137 case '+': break;
901 case '%': break; 1138 case '%': break;
902 case '#': break; 1139 case '#': break;
903 case 'F': 1140 case 'F':
904 case 'p': 1141 case 'p':
905 case 'f': prints("FILE "); found_file = 1; break; 1142 case 'f': prints("FILE "); found_file = 1; break;
906 case 'o': prints(" TYPE "); break; 1143 case 'o': prints(" TYPE "); break;
907 case 'x': prints(" PAX "); break; 1144 case 'x': prints(" PAX "); break;
908 case 'e': prints("STK/REL/PTL "); break; 1145 case 'e': prints("STK/REL/PTL "); break;
909 case 't': prints("TEXTREL "); break; 1146 case 't': prints("TEXTREL "); break;
910 case 'r': prints("RPATH "); break; 1147 case 'r': prints("RPATH "); break;
1148 case 'M': prints("CLASS "); break;
911 case 'n': prints("NEEDED "); break; 1149 case 'n': prints("NEEDED "); break;
912 case 'i': prints("INTERP "); break; 1150 case 'i': prints("INTERP "); break;
913 case 'b': prints("BIND "); break; 1151 case 'b': prints("BIND "); break;
914 case 'S': prints("SONAME "); break; 1152 case 'S': prints("SONAME "); break;
915 case 's': prints("SYM "); break; 1153 case 's': prints("SYM "); break;
916 case 'N': prints("LIB "); break; 1154 case 'N': prints("LIB "); break;
917 case 'T': prints("TEXTRELS "); break; 1155 case 'T': prints("TEXTRELS "); break;
1156 case 'k': prints("SECTION "); break;
1157 case 'a': prints("ARCH "); break;
1158 case 'O': prints("PERM "); break;
1159 case 'D': prints("ENDIAN "); break;
918 default: warnf("'%c' has no title ?", out_format[i]); 1160 default: warnf("'%c' has no title ?", out_format[i]);
919 } 1161 }
920 } 1162 }
921 if (!found_file) prints("FILE "); 1163 if (!found_file) prints("FILE ");
922 prints("\n"); 1164 prints("\n");
927 /* dump all the good stuff */ 1169 /* dump all the good stuff */
928 for (i = 0; out_format[i]; ++i) { 1170 for (i = 0; out_format[i]; ++i) {
929 const char *out; 1171 const char *out;
930 const char *tmp; 1172 const char *tmp;
931 1173
932 /* make sure we trim leading spaces in quiet mode */
933 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
934 *out_buffer = '\0';
935
936 if (!IS_MODIFIER(out_format[i])) { 1174 if (!IS_MODIFIER(out_format[i])) {
937 xchrcat(&out_buffer, out_format[i], &out_len); 1175 xchrcat(&out_buffer, out_format[i], &out_len);
938 continue; 1176 continue;
939 } 1177 }
940 1178
941 out = NULL; 1179 out = NULL;
942 be_wewy_wewy_quiet = (out_format[i] == '#'); 1180 be_wewy_wewy_quiet = (out_format[i] == '#');
1181 be_semi_verbose = (out_format[i] == '+');
943 switch (out_format[++i]) { 1182 switch (out_format[++i]) {
1183 case '+':
944 case '%': 1184 case '%':
945 case '#': 1185 case '#':
946 xchrcat(&out_buffer, out_format[i], &out_len); break; 1186 xchrcat(&out_buffer, out_format[i], &out_len); break;
947 case 'F': 1187 case 'F':
948 found_file = 1; 1188 found_file = 1;
949 if (be_wewy_wewy_quiet) break; 1189 if (be_wewy_wewy_quiet) break;
950 xstrcat(&out_buffer, filename, &out_len); 1190 xstrcat(&out_buffer, elf->filename, &out_len);
951 break; 1191 break;
952 case 'p': 1192 case 'p':
953 found_file = 1; 1193 found_file = 1;
954 if (be_wewy_wewy_quiet) break; 1194 if (be_wewy_wewy_quiet) break;
955 tmp = filename; 1195 tmp = elf->filename;
956 if (search_path) { 1196 if (search_path) {
957 ssize_t len_search = strlen(search_path); 1197 ssize_t len_search = strlen(search_path);
958 ssize_t len_file = strlen(filename); 1198 ssize_t len_file = strlen(elf->filename);
959 if (!strncmp(filename, search_path, len_search) && \ 1199 if (!strncmp(elf->filename, search_path, len_search) && \
960 len_file > len_search) 1200 len_file > len_search)
961 tmp += len_search; 1201 tmp += len_search;
962 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++; 1202 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
963 } 1203 }
964 xstrcat(&out_buffer, tmp, &out_len); 1204 xstrcat(&out_buffer, tmp, &out_len);
965 break; 1205 break;
966 case 'f': 1206 case 'f':
967 found_file = 1; 1207 found_file = 1;
968 if (be_wewy_wewy_quiet) break; 1208 if (be_wewy_wewy_quiet) break;
969 tmp = strrchr(filename, '/'); 1209 tmp = strrchr(elf->filename, '/');
970 tmp = (tmp == NULL ? filename : tmp+1); 1210 tmp = (tmp == NULL ? elf->filename : tmp+1);
971 xstrcat(&out_buffer, tmp, &out_len); 1211 xstrcat(&out_buffer, tmp, &out_len);
972 break; 1212 break;
973 case 'o': out = get_elfetype(elf); break; 1213 case 'o': out = get_elfetype(elf); break;
974 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1214 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
975 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break; 1215 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
976 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1216 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
977 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break; 1217 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
978 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 1218 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1219 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1220 case 'D': out = get_endian(elf); break;
1221 case 'O': out = getstr_perms(elf->filename); break;
979 case 'n': 1222 case 'n':
980 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; 1223 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
981 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1224 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
982 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1225 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
983 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1226 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
984 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1227 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1228 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1229 case 'a': out = get_elfemtype(elf); break;
985 default: warnf("'%c' has no scan code?", out_format[i]); 1230 default: warnf("'%c' has no scan code?", out_format[i]);
986 } 1231 }
987 if (out) { 1232 if (out) {
988 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */ 1233 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
989 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL) 1234 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
994 } 1239 }
995 1240
996#define FOUND_SOMETHING() \ 1241#define FOUND_SOMETHING() \
997 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1242 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
998 found_rpath || found_needed || found_interp || found_bind || \ 1243 found_rpath || found_needed || found_interp || found_bind || \
999 found_soname || found_sym || found_lib || found_textrels) 1244 found_soname || found_sym || found_lib || found_textrels || found_section )
1000 1245
1001 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { 1246 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
1002 xchrcat(&out_buffer, ' ', &out_len); 1247 xchrcat(&out_buffer, ' ', &out_len);
1003 xstrcat(&out_buffer, filename, &out_len); 1248 xstrcat(&out_buffer, elf->filename, &out_len);
1004 } 1249 }
1005 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) { 1250 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
1006 puts(out_buffer); 1251 puts(out_buffer);
1007 fflush(stdout); 1252 fflush(stdout);
1008 } 1253 }
1009 1254
1255 return 0;
1256}
1257
1258/* scan a single elf */
1259static int scanelf_elf(const char *filename, int fd, size_t len)
1260{
1261 int ret = 1;
1262 elfobj *elf;
1263
1264 /* verify this is real ELF */
1265 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1266 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1267 return ret;
1268 }
1269 switch (match_bits) {
1270 case 32:
1271 if (elf->elf_class != ELFCLASS32)
1272 goto label_done;
1273 break;
1274 case 64:
1275 if (elf->elf_class != ELFCLASS64)
1276 goto label_done;
1277 break;
1278 default: break;
1279 }
1280 if (strlen(match_etypes)) {
1281 char sbuf[126];
1282 strncpy(sbuf, match_etypes, sizeof(sbuf));
1283 if (strchr(match_etypes, ',') != NULL) {
1284 char *p;
1285 while ((p = strrchr(sbuf, ',')) != NULL) {
1286 *p = 0;
1287 if (etype_lookup(p+1) == get_etype(elf))
1288 goto label_ret;
1289 }
1290 }
1291 if (etype_lookup(sbuf) != get_etype(elf))
1292 goto label_done;
1293 }
1294
1295label_ret:
1296 ret = scanelf_elfobj(elf);
1297
1298label_done:
1010 unreadelf(elf); 1299 unreadelf(elf);
1300 return ret;
1301}
1302
1303/* scan an archive of elfs */
1304static int scanelf_archive(const char *filename, int fd, size_t len)
1305{
1306 archive_handle *ar;
1307 archive_member *m;
1308 char *ar_buffer;
1309 elfobj *elf;
1310
1311 ar = ar_open_fd(filename, fd);
1312 if (ar == NULL)
1313 return 1;
1314
1315 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1316 while ((m=ar_next(ar)) != NULL) {
1317 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1318 if (elf) {
1319 scanelf_elfobj(elf);
1320 unreadelf(elf);
1321 }
1322 }
1323 munmap(ar_buffer, len);
1324
1325 return 0;
1326}
1327/* scan a file which may be an elf or an archive or some other magical beast */
1328static int scanelf_file(const char *filename, const struct stat *st_cache)
1329{
1330 const struct stat *st = st_cache;
1331 struct stat symlink_st;
1332 int fd;
1333
1334 /* always handle regular files and handle symlinked files if no -y */
1335 if (S_ISLNK(st->st_mode)) {
1336 if (!scan_symlink) return 1;
1337 stat(filename, &symlink_st);
1338 st = &symlink_st;
1339 }
1340
1341 if (!S_ISREG(st->st_mode)) {
1342 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1343 return 1;
1344 }
1345
1346 if (match_perms) {
1347 if ((st->st_mode | match_perms) != st->st_mode)
1348 return 1;
1349 }
1350 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1351 return 1;
1352
1353 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1354 /* if it isn't an ELF, maybe it's an .a archive */
1355 scanelf_archive(filename, fd, st->st_size);
1356
1357 close(fd);
1358 return 0;
1011} 1359}
1012 1360
1013/* scan a directory for ET_EXEC files and print when we find one */ 1361/* scan a directory for ET_EXEC files and print when we find one */
1014static void scanelf_dir(const char *path) 1362static int scanelf_dir(const char *path)
1015{ 1363{
1016 register DIR *dir; 1364 register DIR *dir;
1017 register struct dirent *dentry; 1365 register struct dirent *dentry;
1018 struct stat st_top, st; 1366 struct stat st_top, st;
1019 char buf[_POSIX_PATH_MAX]; 1367 char buf[__PAX_UTILS_PATH_MAX];
1020 size_t pathlen = 0, len = 0; 1368 size_t pathlen = 0, len = 0;
1369 int ret = 0;
1021 1370
1022 /* make sure path exists */ 1371 /* make sure path exists */
1023 if (lstat(path, &st_top) == -1) { 1372 if (lstat(path, &st_top) == -1) {
1024 if (be_verbose > 2) printf("%s: does not exist\n", path); 1373 if (be_verbose > 2) printf("%s: does not exist\n", path);
1025 return; 1374 return 1;
1026 } 1375 }
1027 1376
1028 /* ok, if it isn't a directory, assume we can open it */ 1377 /* ok, if it isn't a directory, assume we can open it */
1029 if (!S_ISDIR(st_top.st_mode)) { 1378 if (!S_ISDIR(st_top.st_mode)) {
1030 scanelf_file(path); 1379 return scanelf_file(path, &st_top);
1031 return;
1032 } 1380 }
1033 1381
1034 /* now scan the dir looking for fun stuff */ 1382 /* now scan the dir looking for fun stuff */
1035 if ((dir = opendir(path)) == NULL) { 1383 if ((dir = opendir(path)) == NULL) {
1036 warnf("could not opendir %s: %s", path, strerror(errno)); 1384 warnf("could not opendir %s: %s", path, strerror(errno));
1037 return; 1385 return 1;
1038 } 1386 }
1039 if (be_verbose) printf("%s: scanning dir\n", path); 1387 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1040 1388
1041 pathlen = strlen(path); 1389 pathlen = strlen(path);
1042 while ((dentry = readdir(dir))) { 1390 while ((dentry = readdir(dir))) {
1043 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 1391 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
1044 continue; 1392 continue;
1046 if (len >= sizeof(buf)) { 1394 if (len >= sizeof(buf)) {
1047 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, 1395 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1048 (unsigned long)len, (unsigned long)sizeof(buf)); 1396 (unsigned long)len, (unsigned long)sizeof(buf));
1049 continue; 1397 continue;
1050 } 1398 }
1051 sprintf(buf, "%s/%s", path, dentry->d_name); 1399 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
1052 if (lstat(buf, &st) != -1) { 1400 if (lstat(buf, &st) != -1) {
1053 if (S_ISREG(st.st_mode)) 1401 if (S_ISREG(st.st_mode))
1054 scanelf_file(buf); 1402 ret = scanelf_file(buf, &st);
1055 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1403 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1056 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1404 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1057 scanelf_dir(buf); 1405 ret = scanelf_dir(buf);
1058 } 1406 }
1059 } 1407 }
1060 } 1408 }
1061 closedir(dir); 1409 closedir(dir);
1410 return ret;
1062} 1411}
1063 1412
1064static int scanelf_from_file(char *filename) 1413static int scanelf_from_file(const char *filename)
1065{ 1414{
1066 FILE *fp = NULL; 1415 FILE *fp = NULL;
1067 char *p; 1416 char *p;
1068 char path[_POSIX_PATH_MAX]; 1417 char path[__PAX_UTILS_PATH_MAX];
1418 int ret = 0;
1069 1419
1070 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) 1420 if (strcmp(filename, "-") == 0)
1071 fp = stdin; 1421 fp = stdin;
1072 else if ((fp = fopen(filename, "r")) == NULL) 1422 else if ((fp = fopen(filename, "r")) == NULL)
1073 return 1; 1423 return 1;
1074 1424
1075 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1425 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1076 if ((p = strchr(path, '\n')) != NULL) 1426 if ((p = strchr(path, '\n')) != NULL)
1077 *p = 0; 1427 *p = 0;
1078 search_path = path; 1428 search_path = path;
1079 scanelf_dir(path); 1429 ret = scanelf_dir(path);
1080 } 1430 }
1081 if (fp != stdin) 1431 if (fp != stdin)
1082 fclose(fp); 1432 fclose(fp);
1083 return 0; 1433 return ret;
1084} 1434}
1085 1435
1086static void load_ld_so_conf() 1436#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1437
1438static int load_ld_cache_config(int i, const char *fname)
1087{ 1439{
1088 FILE *fp = NULL; 1440 FILE *fp = NULL;
1089 char *p; 1441 char *p;
1090 char path[_POSIX_PATH_MAX]; 1442 char path[__PAX_UTILS_PATH_MAX];
1091 int i = 0;
1092 1443
1093 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 1444 if (i + 1 == ARRAY_SIZE(ldpaths))
1094 return; 1445 return i;
1095 1446
1447 if ((fp = fopen(fname, "r")) == NULL)
1448 return i;
1449
1096 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1450 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1097 if (*path != '/')
1098 continue;
1099
1100 if ((p = strrchr(path, '\r')) != NULL) 1451 if ((p = strrchr(path, '\r')) != NULL)
1101 *p = 0; 1452 *p = 0;
1102 if ((p = strchr(path, '\n')) != NULL) 1453 if ((p = strchr(path, '\n')) != NULL)
1103 *p = 0; 1454 *p = 0;
1455#ifdef __linux__
1456 /* recursive includes of the same file will make this segfault. */
1457 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1458 glob64_t gl;
1459 size_t x;
1460 char gpath[__PAX_UTILS_PATH_MAX];
1461
1462 memset(gpath, 0, sizeof(gpath));
1463
1464 if (path[8] != '/')
1465 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]);
1466 else
1467 strncpy(gpath, &path[8], sizeof(gpath));
1468
1469 if ((glob64(gpath, 0, NULL, &gl)) == 0) {
1470 for (x = 0; x < gl.gl_pathc; ++x) {
1471 /* try to avoid direct loops */
1472 if (strcmp(gl.gl_pathv[x], fname) == 0)
1473 continue;
1474 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1475 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1476 globfree64(&gl);
1477 return i;
1478 }
1479 }
1480 globfree64 (&gl);
1481 continue;
1482 }
1483 }
1484#endif
1485 if (*path != '/')
1486 continue;
1104 1487
1105 ldpaths[i++] = xstrdup(path); 1488 ldpaths[i++] = xstrdup(path);
1106 1489
1107 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1490 if (i + 1 == ARRAY_SIZE(ldpaths))
1108 break; 1491 break;
1109 } 1492 }
1110 ldpaths[i] = NULL; 1493 ldpaths[i] = NULL;
1111 1494
1112 fclose(fp); 1495 fclose(fp);
1496 return i;
1113} 1497}
1498
1499#elif defined(__FreeBSD__) || (__DragonFly__)
1500
1501static int load_ld_cache_config(int i, const char *fname)
1502{
1503 FILE *fp = NULL;
1504 char *b = NULL, *p;
1505 struct elfhints_hdr hdr;
1506
1507 if (i + 1 == ARRAY_SIZE(ldpaths))
1508 return i;
1509
1510 if ((fp = fopen(fname, "r")) == NULL)
1511 return i;
1512
1513 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1514 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1515 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1516 {
1517 fclose(fp);
1518 return i;
1519 }
1520
1521 b = xmalloc(hdr.dirlistlen + 1);
1522 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1523 fclose(fp);
1524 free(b);
1525 return i;
1526 }
1527
1528 while ((p = strsep(&b, ":"))) {
1529 if (*p == '\0') continue;
1530 ldpaths[i++] = xstrdup(p);
1531
1532 if (i + 1 == ARRAY_SIZE(ldpaths))
1533 break;
1534 }
1535 ldpaths[i] = NULL;
1536
1537 free(b);
1538 fclose(fp);
1539 return i;
1540}
1541
1542#else
1543
1544#warning Cache config support not implemented for your target
1545static int load_ld_cache_config(int i, const char *fname)
1546{
1547 memset(ldpaths, 0x00, sizeof(ldpaths));
1548}
1549
1550#endif
1114 1551
1115/* scan /etc/ld.so.conf for paths */ 1552/* scan /etc/ld.so.conf for paths */
1116static void scanelf_ldpath() 1553static void scanelf_ldpath(void)
1117{ 1554{
1118 char scan_l, scan_ul, scan_ull; 1555 char scan_l, scan_ul, scan_ull;
1119 int i = 0; 1556 int i = 0;
1120 1557
1121 if (!ldpaths[0]) 1558 if (!ldpaths[0])
1135 if (!scan_ul) scanelf_dir("/usr/lib"); 1572 if (!scan_ul) scanelf_dir("/usr/lib");
1136 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1573 if (!scan_ull) scanelf_dir("/usr/local/lib");
1137} 1574}
1138 1575
1139/* scan env PATH for paths */ 1576/* scan env PATH for paths */
1140static void scanelf_envpath() 1577static void scanelf_envpath(void)
1141{ 1578{
1142 char *path, *p; 1579 char *path, *p;
1143 1580
1144 path = getenv("PATH"); 1581 path = getenv("PATH");
1145 if (!path) 1582 if (!path)
1153 1590
1154 free(path); 1591 free(path);
1155} 1592}
1156 1593
1157 1594
1158/* usage / invocation handling functions */ 1595/* usage / invocation handling functions */ /* Free Flags: c d j u w C G H I J K P Q U W Y Z */
1159#define PARSE_FLAGS "plRmyXxetrnLibSs:gN:TaqvF:f:o:BhV" 1596#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DO:BhV"
1160#define a_argument required_argument 1597#define a_argument required_argument
1161static struct option const long_opts[] = { 1598static struct option const long_opts[] = {
1162 {"path", no_argument, NULL, 'p'}, 1599 {"path", no_argument, NULL, 'p'},
1163 {"ldpath", no_argument, NULL, 'l'}, 1600 {"ldpath", no_argument, NULL, 'l'},
1164 {"recursive", no_argument, NULL, 'R'}, 1601 {"recursive", no_argument, NULL, 'R'},
1165 {"mount", no_argument, NULL, 'm'}, 1602 {"mount", no_argument, NULL, 'm'},
1166 {"symlink", no_argument, NULL, 'y'}, 1603 {"symlink", no_argument, NULL, 'y'},
1604 {"archives", no_argument, NULL, 'A'},
1605 {"ldcache", no_argument, NULL, 'L'},
1167 {"fix", no_argument, NULL, 'X'}, 1606 {"fix", no_argument, NULL, 'X'},
1607 {"setpax", a_argument, NULL, 'z'},
1168 {"pax", no_argument, NULL, 'x'}, 1608 {"pax", no_argument, NULL, 'x'},
1169 {"header", no_argument, NULL, 'e'}, 1609 {"header", no_argument, NULL, 'e'},
1170 {"textrel", no_argument, NULL, 't'}, 1610 {"textrel", no_argument, NULL, 't'},
1171 {"rpath", no_argument, NULL, 'r'}, 1611 {"rpath", no_argument, NULL, 'r'},
1172 {"needed", no_argument, NULL, 'n'}, 1612 {"needed", no_argument, NULL, 'n'},
1173 {"ldcache", no_argument, NULL, 'L'},
1174 {"interp", no_argument, NULL, 'i'}, 1613 {"interp", no_argument, NULL, 'i'},
1175 {"bind", no_argument, NULL, 'b'}, 1614 {"bind", no_argument, NULL, 'b'},
1176 {"soname", no_argument, NULL, 'S'}, 1615 {"soname", no_argument, NULL, 'S'},
1177 {"symbol", a_argument, NULL, 's'}, 1616 {"symbol", a_argument, NULL, 's'},
1617 {"section", a_argument, NULL, 'k'},
1178 {"lib", a_argument, NULL, 'N'}, 1618 {"lib", a_argument, NULL, 'N'},
1179 {"gmatch", no_argument, NULL, 'g'}, 1619 {"gmatch", no_argument, NULL, 'g'},
1180 {"textrels", no_argument, NULL, 'T'}, 1620 {"textrels", no_argument, NULL, 'T'},
1621 {"etype", a_argument, NULL, 'E'},
1622 {"bits", a_argument, NULL, 'M'},
1623 {"endian", no_argument, NULL, 'D'},
1624 {"perms", a_argument, NULL, 'O'},
1181 {"all", no_argument, NULL, 'a'}, 1625 {"all", no_argument, NULL, 'a'},
1182 {"quiet", no_argument, NULL, 'q'}, 1626 {"quiet", no_argument, NULL, 'q'},
1183 {"verbose", no_argument, NULL, 'v'}, 1627 {"verbose", no_argument, NULL, 'v'},
1184 {"format", a_argument, NULL, 'F'}, 1628 {"format", a_argument, NULL, 'F'},
1185 {"from", a_argument, NULL, 'f'}, 1629 {"from", a_argument, NULL, 'f'},
1194 "Scan all directories in PATH environment", 1638 "Scan all directories in PATH environment",
1195 "Scan all directories in /etc/ld.so.conf", 1639 "Scan all directories in /etc/ld.so.conf",
1196 "Scan directories recursively", 1640 "Scan directories recursively",
1197 "Don't recursively cross mount points", 1641 "Don't recursively cross mount points",
1198 "Don't scan symlinks", 1642 "Don't scan symlinks",
1643 "Scan archives (.a files)",
1644 "Utilize ld.so.cache information (use with -r/-n)",
1199 "Try and 'fix' bad things (use with -r/-e)\n", 1645 "Try and 'fix' bad things (use with -r/-e)",
1646 "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
1200 "Print PaX markings", 1647 "Print PaX markings",
1201 "Print GNU_STACK/PT_LOAD markings", 1648 "Print GNU_STACK/PT_LOAD markings",
1202 "Print TEXTREL information", 1649 "Print TEXTREL information",
1203 "Print RPATH information", 1650 "Print RPATH information",
1204 "Print NEEDED information", 1651 "Print NEEDED information",
1205 "Utilize ld.so.cache information (use with -r/-n)",
1206 "Print INTERP information", 1652 "Print INTERP information",
1207 "Print BIND information", 1653 "Print BIND information",
1208 "Print SONAME information", 1654 "Print SONAME information",
1209 "Find a specified symbol", 1655 "Find a specified symbol",
1656 "Find a specified section",
1210 "Find a specified library", 1657 "Find a specified library",
1211 "Use strncmp to match libraries. (use with -N)", 1658 "Use strncmp to match libraries. (use with -N)",
1212 "Locate cause of TEXTREL", 1659 "Locate cause of TEXTREL",
1660 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1661 "Print only ELF files matching numeric bits",
1662 "Print Endianness",
1663 "Print only ELF files matching octal permissions",
1213 "Print all scanned info (-x -e -t -r -b)\n", 1664 "Print all scanned info (-x -e -t -r -b)\n",
1214 "Only output 'bad' things", 1665 "Only output 'bad' things",
1215 "Be verbose (can be specified more than once)", 1666 "Be verbose (can be specified more than once)",
1216 "Use specified format for output", 1667 "Use specified format for output",
1217 "Read input stream from a filename", 1668 "Read input stream from a filename",
1225/* display usage and exit */ 1676/* display usage and exit */
1226static void usage(int status) 1677static void usage(int status)
1227{ 1678{
1228 unsigned long i; 1679 unsigned long i;
1229 printf("* Scan ELF binaries for stuff\n\n" 1680 printf("* Scan ELF binaries for stuff\n\n"
1230 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 1681 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1231 printf("Options: -[%s]\n", PARSE_FLAGS); 1682 printf("Options: -[%s]\n", PARSE_FLAGS);
1232 for (i = 0; long_opts[i].name; ++i) 1683 for (i = 0; long_opts[i].name; ++i)
1233 if (long_opts[i].has_arg == no_argument) 1684 if (long_opts[i].has_arg == no_argument)
1234 printf(" -%c, --%-13s* %s\n", long_opts[i].val, 1685 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1235 long_opts[i].name, opts_help[i]); 1686 long_opts[i].name, opts_help[i]);
1236 else 1687 else
1237 printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val, 1688 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1238 long_opts[i].name, opts_help[i]); 1689 long_opts[i].name, opts_help[i]);
1239 1690
1240 if (status != EXIT_SUCCESS) 1691 puts("\nFor more information, see the scanelf(1) manpage");
1241 exit(status);
1242
1243 puts("\nThe format modifiers for the -F option are:");
1244 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1245 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1246 puts(" i INTERP \tb BIND \ts symbol");
1247 puts(" N library \to Type \tT TEXTRELs");
1248 puts(" S SONAME");
1249 puts(" p filename (with search path removed)");
1250 puts(" f filename (short name/basename)");
1251 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1252
1253 exit(status); 1692 exit(status);
1254} 1693}
1255 1694
1256/* parse command line arguments and preform needed actions */ 1695/* parse command line arguments and preform needed actions */
1696#define do_pax_state(option, flag) \
1697 if (islower(option)) { \
1698 flags &= ~PF_##flag; \
1699 flags |= PF_NO##flag; \
1700 } else { \
1701 flags &= ~PF_NO##flag; \
1702 flags |= PF_##flag; \
1703 }
1257static void parseargs(int argc, char *argv[]) 1704static int parseargs(int argc, char *argv[])
1258{ 1705{
1259 int i; 1706 int i;
1260 char *from_file = NULL; 1707 const char *from_file = NULL;
1708 int ret = 0;
1261 1709
1262 opterr = 0; 1710 opterr = 0;
1263 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 1711 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1264 switch (i) { 1712 switch (i) {
1265 1713
1272 case 'h': usage(EXIT_SUCCESS); break; 1720 case 'h': usage(EXIT_SUCCESS); break;
1273 case 'f': 1721 case 'f':
1274 if (from_file) warn("You prob don't want to specify -f twice"); 1722 if (from_file) warn("You prob don't want to specify -f twice");
1275 from_file = optarg; 1723 from_file = optarg;
1276 break; 1724 break;
1725 case 'E':
1726 strncpy(match_etypes, optarg, sizeof(match_etypes));
1727 break;
1728 case 'M':
1729 match_bits = atoi(optarg);
1730 if (match_bits == 0) {
1731 if (strcmp(optarg, "ELFCLASS32") == 0)
1732 match_bits = 32;
1733 if (strcmp(optarg, "ELFCLASS64") == 0)
1734 match_bits = 64;
1735 }
1736 break;
1737 case 'O':
1738 if (sscanf(optarg, "%o", &match_perms) == (-1))
1739 match_bits = 0;
1740 break;
1277 case 'o': { 1741 case 'o': {
1278 FILE *fp = NULL;
1279 if ((fp = freopen(optarg, "w", stdout)) == NULL) 1742 if (freopen(optarg, "w", stdout) == NULL)
1280 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1743 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1281 SET_STDOUT(fp);
1282 break; 1744 break;
1283 } 1745 }
1284 1746 case 'k':
1747 if (find_section) warn("You prob don't want to specify -k twice");
1748 find_section = optarg;
1749 break;
1285 case 's': { 1750 case 's': {
1286 if (find_sym) warn("You prob don't want to specify -s twice"); 1751 if (find_sym) warn("You prob don't want to specify -s twice");
1287 find_sym = optarg; 1752 find_sym = optarg;
1288 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1)); 1753 versioned_symname = xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1289 sprintf(versioned_symname, "%s@", find_sym); 1754 sprintf(versioned_symname, "%s@", find_sym);
1290 break; 1755 break;
1291 } 1756 }
1292 case 'N': { 1757 case 'N': {
1293 if (find_lib) warn("You prob don't want to specify -N twice"); 1758 if (find_lib) warn("You prob don't want to specify -N twice");
1298 case 'F': { 1763 case 'F': {
1299 if (out_format) warn("You prob don't want to specify -F twice"); 1764 if (out_format) warn("You prob don't want to specify -F twice");
1300 out_format = optarg; 1765 out_format = optarg;
1301 break; 1766 break;
1302 } 1767 }
1768 case 'z': {
1769 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1770 size_t x;
1303 1771
1304 case 'g': gmatch = 1; /* break; any reason we dont breal; here ? */ 1772 for (x = 0; x < strlen(optarg); x++) {
1773 switch (optarg[x]) {
1774 case 'p':
1775 case 'P':
1776 do_pax_state(optarg[x], PAGEEXEC);
1777 break;
1778 case 's':
1779 case 'S':
1780 do_pax_state(optarg[x], SEGMEXEC);
1781 break;
1782 case 'm':
1783 case 'M':
1784 do_pax_state(optarg[x], MPROTECT);
1785 break;
1786 case 'e':
1787 case 'E':
1788 do_pax_state(optarg[x], EMUTRAMP);
1789 break;
1790 case 'r':
1791 case 'R':
1792 do_pax_state(optarg[x], RANDMMAP);
1793 break;
1794 case 'x':
1795 case 'X':
1796 do_pax_state(optarg[x], RANDEXEC);
1797 break;
1798 default:
1799 break;
1800 }
1801 }
1802 if (!(((flags & PF_PAGEEXEC) && (flags & PF_NOPAGEEXEC)) ||
1803 ((flags & PF_SEGMEXEC) && (flags & PF_NOSEGMEXEC)) ||
1804 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)) ||
1805 ((flags & PF_RANDEXEC) && (flags & PF_NORANDEXEC)) ||
1806 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1807 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1808 setpax = flags;
1809 break;
1810 }
1811 case 'g': g_match = 1; break;
1305 case 'L': use_ldcache = 1; break; 1812 case 'L': use_ldcache = 1; break;
1306 case 'y': scan_symlink = 0; break; 1813 case 'y': scan_symlink = 0; break;
1814 case 'A': scan_archives = 1; break;
1307 case 'B': show_banner = 0; break; 1815 case 'B': show_banner = 0; break;
1308 case 'l': scan_ldpath = 1; break; 1816 case 'l': scan_ldpath = 1; break;
1309 case 'p': scan_envpath = 1; break; 1817 case 'p': scan_envpath = 1; break;
1310 case 'R': dir_recurse = 1; break; 1818 case 'R': dir_recurse = 1; break;
1311 case 'm': dir_crossmount = 0; break; 1819 case 'm': dir_crossmount = 0; break;
1319 case 'b': show_bind = 1; break; 1827 case 'b': show_bind = 1; break;
1320 case 'S': show_soname = 1; break; 1828 case 'S': show_soname = 1; break;
1321 case 'T': show_textrels = 1; break; 1829 case 'T': show_textrels = 1; break;
1322 case 'q': be_quiet = 1; break; 1830 case 'q': be_quiet = 1; break;
1323 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1831 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1324 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break; 1832 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1325 1833 case 'D': show_endian = 1; break;
1326 case ':': 1834 case ':':
1327 err("Option missing parameter\n"); 1835 err("Option '%c' is missing parameter", optopt);
1328 case '?': 1836 case '?':
1329 err("Unknown option\n"); 1837 err("Unknown option '%c' or argument missing", optopt);
1330 default: 1838 default:
1331 err("Unhandled option '%c'", i); 1839 err("Unhandled option '%c'; please report this", i);
1332 }
1333 } 1840 }
1334 1841 }
1842 if (show_textrels && be_verbose) {
1843 if (which("objdump") != NULL)
1844 has_objdump = 1;
1845 }
1335 /* let the format option override all other options */ 1846 /* let the format option override all other options */
1336 if (out_format) { 1847 if (out_format) {
1337 show_pax = show_phdr = show_textrel = show_rpath = \ 1848 show_pax = show_phdr = show_textrel = show_rpath = \
1338 show_needed = show_interp = show_bind = show_soname = \ 1849 show_needed = show_interp = show_bind = show_soname = \
1339 show_textrels = 0; 1850 show_textrels = show_perms = show_endian = 0;
1340 for (i = 0; out_format[i]; ++i) { 1851 for (i = 0; out_format[i]; ++i) {
1341 if (!IS_MODIFIER(out_format[i])) continue; 1852 if (!IS_MODIFIER(out_format[i])) continue;
1342 1853
1343 switch (out_format[++i]) { 1854 switch (out_format[++i]) {
1855 case '+': break;
1344 case '%': break; 1856 case '%': break;
1345 case '#': break; 1857 case '#': break;
1346 case 'F': break; 1858 case 'F': break;
1347 case 'p': break; 1859 case 'p': break;
1348 case 'f': break; 1860 case 'f': break;
1861 case 'k': break;
1349 case 's': break; 1862 case 's': break;
1350 case 'N': break; 1863 case 'N': break;
1351 case 'o': break; 1864 case 'o': break;
1865 case 'a': break;
1866 case 'M': break;
1867 case 'D': show_endian = 1; break;
1868 case 'O': show_perms = 1; break;
1352 case 'x': show_pax = 1; break; 1869 case 'x': show_pax = 1; break;
1353 case 'e': show_phdr = 1; break; 1870 case 'e': show_phdr = 1; break;
1354 case 't': show_textrel = 1; break; 1871 case 't': show_textrel = 1; break;
1355 case 'r': show_rpath = 1; break; 1872 case 'r': show_rpath = 1; break;
1356 case 'n': show_needed = 1; break; 1873 case 'n': show_needed = 1; break;
1357 case 'i': show_interp = 1; break; 1874 case 'i': show_interp = 1; break;
1358 case 'b': show_bind = 1; break; 1875 case 'b': show_bind = 1; break;
1359 case 'S': show_soname = 1; break; 1876 case 'S': show_soname = 1; break;
1360 case 'T': show_textrels = 1; break; 1877 case 'T': show_textrels = 1; break;
1361 default: 1878 default:
1362 err("Invalid format specifier '%c' (byte %i)", 1879 err("Invalid format specifier '%c' (byte %i)",
1363 out_format[i], i+1); 1880 out_format[i], i+1);
1364 } 1881 }
1365 } 1882 }
1366 1883
1367 /* construct our default format */ 1884 /* construct our default format */
1368 } else { 1885 } else {
1369 size_t fmt_len = 30; 1886 size_t fmt_len = 30;
1370 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 1887 out_format = xmalloc(sizeof(char) * fmt_len);
1371 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 1888 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1372 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 1889 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1890 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
1891 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
1373 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 1892 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1374 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 1893 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1375 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 1894 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1376 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 1895 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1377 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 1896 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1378 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len); 1897 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1379 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len); 1898 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1380 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len); 1899 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
1381 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len); 1900 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1901 if (find_section) xstrcat(&out_format, "%k ", &fmt_len);
1382 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len); 1902 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
1383 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 1903 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1384 } 1904 }
1385 if (be_verbose > 2) printf("Format: %s\n", out_format); 1905 if (be_verbose > 2) printf("Format: %s\n", out_format);
1386 1906
1387 /* now lets actually do the scanning */ 1907 /* now lets actually do the scanning */
1388 if (scan_ldpath || use_ldcache) 1908 if (scan_ldpath || use_ldcache)
1389 load_ld_so_conf(); 1909 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1390 if (scan_ldpath) scanelf_ldpath(); 1910 if (scan_ldpath) scanelf_ldpath();
1391 if (scan_envpath) scanelf_envpath(); 1911 if (scan_envpath) scanelf_envpath();
1912 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1913 from_file = "-";
1392 if (from_file) { 1914 if (from_file) {
1393 scanelf_from_file(from_file); 1915 scanelf_from_file(from_file);
1394 from_file = *argv; 1916 from_file = *argv;
1395 } 1917 }
1396 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1918 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1397 err("Nothing to scan !?"); 1919 err("Nothing to scan !?");
1398 while (optind < argc) { 1920 while (optind < argc) {
1399 search_path = argv[optind++]; 1921 search_path = argv[optind++];
1400 scanelf_dir(search_path); 1922 ret = scanelf_dir(search_path);
1401 } 1923 }
1402 1924
1403 /* clean up */ 1925 /* clean up */
1404 if (versioned_symname) free(versioned_symname); 1926 free(versioned_symname);
1405 for (i = 0; ldpaths[i]; ++i) 1927 for (i = 0; ldpaths[i]; ++i)
1406 free(ldpaths[i]); 1928 free(ldpaths[i]);
1407 1929
1408 if (ldcache != 0) 1930 if (ldcache != 0)
1409 munmap(ldcache, ldcache_size); 1931 munmap(ldcache, ldcache_size);
1410}
1411
1412
1413
1414/* utility funcs */
1415static char *xstrdup(const char *s)
1416{
1417 char *ret = strdup(s);
1418 if (!ret) err("Could not strdup(): %s", strerror(errno));
1419 return ret; 1932 return ret;
1420} 1933}
1421static void *xmalloc(size_t size)
1422{
1423 void *ret = malloc(size);
1424 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1425 return ret;
1426}
1427static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1428{
1429 size_t new_len;
1430 1934
1431 new_len = strlen(*dst) + strlen(src); 1935static char **get_split_env(const char *envvar)
1432 if (*curr_len <= new_len) {
1433 *curr_len = new_len + (*curr_len / 2);
1434 *dst = realloc(*dst, *curr_len);
1435 if (!*dst)
1436 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1437 }
1438
1439 if (n)
1440 strncat(*dst, src, n);
1441 else
1442 strcat(*dst, src);
1443}
1444static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1445{ 1936{
1446 static char my_app[2]; 1937 const char *delims = " \t\n";
1447 my_app[0] = append; 1938 char **envvals = NULL;
1448 my_app[1] = '\0'; 1939 char *env, *s;
1449 xstrcat(dst, my_app, curr_len); 1940 int nentry;
1450}
1451 1941
1942 if ((env = getenv(envvar)) == NULL)
1943 return NULL;
1944
1945 env = xstrdup(env);
1946 if (env == NULL)
1947 return NULL;
1948
1949 s = strtok(env, delims);
1950 if (s == NULL) {
1951 free(env);
1952 return NULL;
1953 }
1954
1955 nentry = 0;
1956 while (s != NULL) {
1957 ++nentry;
1958 envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
1959 envvals[nentry-1] = s;
1960 s = strtok(NULL, delims);
1961 }
1962 envvals[nentry] = NULL;
1963
1964 /* don't want to free(env) as it contains the memory that backs
1965 * the envvals array of strings */
1966 return envvals;
1967}
1968
1969static void parseenv(void)
1970{
1971 qa_textrels = get_split_env("QA_TEXTRELS");
1972 qa_execstack = get_split_env("QA_EXECSTACK");
1973 qa_wx_load = get_split_env("QA_WX_LOAD");
1974}
1975
1976#ifdef __PAX_UTILS_CLEANUP
1977static void cleanup(void)
1978{
1979 free(out_format);
1980 free(qa_textrels);
1981 free(qa_execstack);
1982 free(qa_wx_load);
1983}
1984#endif
1452 1985
1453 1986
1454int main(int argc, char *argv[]) 1987int main(int argc, char *argv[])
1455{ 1988{
1989 int ret;
1456 if (argc < 2) 1990 if (argc < 2)
1457 usage(EXIT_FAILURE); 1991 usage(EXIT_FAILURE);
1992 parseenv();
1458 parseargs(argc, argv); 1993 ret = parseargs(argc, argv);
1459 fclose(stdout); 1994 fclose(stdout);
1460#ifdef __BOUNDS_CHECKING_ON 1995#ifdef __PAX_UTILS_CLEANUP
1461 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()"); 1996 cleanup();
1997 warn("The calls to add/delete heap should be off:\n"
1998 "\t- 1 due to the out_buffer not being freed in scanelf_file()\n"
1999 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1462#endif 2000#endif
1463 return EXIT_SUCCESS; 2001 return ret;
1464} 2002}
2003
2004
2005/* Match filename against entries in matchlist, return TRUE
2006 * if the file is listed */
2007static int file_matches_list(const char *filename, char **matchlist)
2008{
2009 char **file;
2010 char *match;
2011 char buf[__PAX_UTILS_PATH_MAX];
2012
2013 if (matchlist == NULL)
2014 return 0;
2015
2016 for (file = matchlist; *file != NULL; file++) {
2017 if (search_path) {
2018 snprintf(buf, sizeof(buf), "%s%s", search_path, *file);
2019 match = buf;
2020 } else {
2021 match = *file;
2022 }
2023 if (fnmatch(match, filename, 0) == 0)
2024 return 1;
2025 }
2026 return 0;
2027}

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