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Revision 1.200 - (hide annotations) (download) (as text)
Wed Dec 10 20:06:20 2008 UTC (5 years, 8 months ago) by grobian
Branch: MAIN
Changes since 1.199: +4 -1 lines
File MIME type: text/x-csrc
undo accidential 'fix'

1 solar 1.1 /*
2 solar 1.178 * Copyright 2003-2007 Gentoo Foundation
3 solar 1.1 * Distributed under the terms of the GNU General Public License v2
4 grobian 1.199 * $Header: /var/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.198 2008/11/17 18:09:55 flameeyes Exp $
5 solar 1.1 *
6 solar 1.179 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7     * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 solar 1.1 */
9    
10 grobian 1.199 static const char *rcsid = "$Id: scanelf.c,v 1.198 2008/11/17 18:09:55 flameeyes Exp $";
11 vapier 1.186 const char * const argv0 = "scanelf";
12    
13 vapier 1.89 #include "paxinc.h"
14 flameeyes 1.141
15 solar 1.132 #define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
16 vapier 1.70
17 vapier 1.10 /* prototypes */
18 kevquinn 1.142 static int file_matches_list(const char *filename, char **matchlist);
19 vapier 1.106 static int scanelf_elfobj(elfobj *elf);
20     static int scanelf_elf(const char *filename, int fd, size_t len);
21     static int scanelf_archive(const char *filename, int fd, size_t len);
22 solar 1.164 static int scanelf_file(const char *filename, const struct stat *st_cache);
23     static int scanelf_dir(const char *path);
24 vapier 1.106 static void scanelf_ldpath(void);
25     static void scanelf_envpath(void);
26 vapier 1.10 static void usage(int status);
27 kevquinn 1.142 static char **get_split_env(const char *envvar);
28     static void parseenv(void);
29 solar 1.164 static int parseargs(int argc, char *argv[]);
30 solar 1.174 static int rematch(const char *regex, const char *match, int cflags);
31 vapier 1.10
32     /* variables to control behavior */
33 solar 1.119 static char match_etypes[126] = "";
34 vapier 1.48 static char *ldpaths[256];
35 vapier 1.10 static char scan_ldpath = 0;
36     static char scan_envpath = 0;
37 vapier 1.37 static char scan_symlink = 1;
38 vapier 1.105 static char scan_archives = 0;
39 vapier 1.10 static char dir_recurse = 0;
40 vapier 1.14 static char dir_crossmount = 1;
41 vapier 1.10 static char show_pax = 0;
42 solar 1.180 static char show_perms = 0;
43 solar 1.190 static char show_size = 0;
44 solar 1.73 static char show_phdr = 0;
45 vapier 1.10 static char show_textrel = 0;
46     static char show_rpath = 0;
47 vapier 1.32 static char show_needed = 0;
48 vapier 1.38 static char show_interp = 0;
49 vapier 1.49 static char show_bind = 0;
50 vapier 1.84 static char show_soname = 0;
51 vapier 1.76 static char show_textrels = 0;
52 solar 1.16 static char show_banner = 1;
53 solar 1.181 static char show_endian = 0;
54 solar 1.191 static char show_osabi = 0;
55     static char show_eabi = 0;
56 vapier 1.10 static char be_quiet = 0;
57 vapier 1.14 static char be_verbose = 0;
58 solar 1.127 static char be_wewy_wewy_quiet = 0;
59 solar 1.132 static char be_semi_verbose = 0;
60 flameeyes 1.198 static char *find_sym = NULL;
61 vapier 1.72 static char *find_lib = NULL;
62 solar 1.124 static char *find_section = NULL;
63 vapier 1.39 static char *out_format = NULL;
64 vapier 1.66 static char *search_path = NULL;
65 vapier 1.101 static char fix_elf = 0;
66 solar 1.176 static char g_match = 0;
67 vapier 1.102 static char use_ldcache = 0;
68 solar 1.1
69 kevquinn 1.142 static char **qa_textrels = NULL;
70     static char **qa_execstack = NULL;
71 kevquinn 1.145 static char **qa_wx_load = NULL;
72 kevquinn 1.142
73 solar 1.120 int match_bits = 0;
74 solar 1.180 unsigned int match_perms = 0;
75 solar 1.96 caddr_t ldcache = 0;
76     size_t ldcache_size = 0;
77 solar 1.127 unsigned long setpax = 0UL;
78 solar 1.96
79 solar 1.170 int has_objdump = 0;
80 solar 1.175
81 solar 1.180 static char *getstr_perms(const char *fname);
82 vapier 1.186 static char *getstr_perms(const char *fname)
83     {
84 solar 1.180 struct stat st;
85     static char buf[8];
86    
87     if ((stat(fname, &st)) == (-1))
88     return (char *) "";
89    
90     snprintf(buf, sizeof(buf), "%o", st.st_mode);
91    
92     return (char *) buf + 2;
93     }
94    
95 solar 1.174 /* find the path to a file by name */
96 solar 1.170 static char *which(const char *fname)
97     {
98     static char fullpath[BUFSIZ];
99 vapier 1.172 char *path, *p;
100 solar 1.170
101 vapier 1.172 path = getenv("PATH");
102     if (!path)
103 solar 1.170 return NULL;
104    
105 vapier 1.172 path = xstrdup(path);
106     while ((p = strrchr(path, ':')) != NULL) {
107 solar 1.170 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
108 vapier 1.172 *p = 0;
109 solar 1.170 if (access(fullpath, R_OK) != (-1)) {
110     free(path);
111     return (char *) fullpath;
112     }
113 vapier 1.172 }
114     free(path);
115 solar 1.170 return NULL;
116     }
117 vapier 1.152
118 solar 1.175 /* 1 on failure. 0 otherwise */
119 solar 1.174 static int rematch(const char *regex, const char *match, int cflags)
120     {
121     regex_t preg;
122     int ret;
123    
124     if ((match == NULL) || (regex == NULL))
125     return EXIT_FAILURE;
126    
127     if ((ret = regcomp(&preg, regex, cflags))) {
128     char err[256];
129    
130     if (regerror(ret, &preg, err, sizeof(err)))
131     fprintf(stderr, "regcomp failed: %s", err);
132     else
133     fprintf(stderr, "regcomp failed");
134    
135     return EXIT_FAILURE;
136     }
137     ret = regexec(&preg, match, 0, NULL, 0);
138     regfree(&preg);
139    
140     return ret;
141     }
142    
143 vapier 1.39 /* sub-funcs for scanelf_file() */
144 vapier 1.77 static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
145     {
146     /* find the best SHT_DYNSYM and SHT_STRTAB sections */
147     #define GET_SYMTABS(B) \
148     if (elf->elf_class == ELFCLASS ## B) { \
149     Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
150     /* debug sections */ \
151     symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
152     strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
153     /* runtime sections */ \
154     dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
155     dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
156     if (symtab && dynsym) { \
157     *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \
158     } else { \
159     *sym = (void*)(symtab ? symtab : dynsym); \
160     } \
161     if (strtab && dynstr) { \
162     *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \
163     } else { \
164     *tab = (void*)(strtab ? strtab : dynstr); \
165     } \
166     }
167     GET_SYMTABS(32)
168     GET_SYMTABS(64)
169     }
170 solar 1.127
171 vapier 1.41 static char *scanelf_file_pax(elfobj *elf, char *found_pax)
172 solar 1.6 {
173 solar 1.61 static char ret[7];
174     unsigned long i, shown;
175    
176 vapier 1.41 if (!show_pax) return NULL;
177 vapier 1.10
178 solar 1.61 shown = 0;
179     memset(&ret, 0, sizeof(ret));
180    
181     if (elf->phdr) {
182     #define SHOW_PAX(B) \
183     if (elf->elf_class == ELFCLASS ## B) { \
184     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
185     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
186     for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
187     if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \
188     continue; \
189 solar 1.127 if (fix_elf && setpax) { \
190     /* set the paxctl flags */ \
191     ESET(phdr[i].p_flags, setpax); \
192     } \
193 solar 1.129 if (be_quiet && (EGET(phdr[i].p_flags) == (PF_NOEMUTRAMP | PF_NORANDEXEC))) \
194 solar 1.61 continue; \
195     memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \
196     *found_pax = 1; \
197     ++shown; \
198     break; \
199     } \
200     }
201     SHOW_PAX(32)
202     SHOW_PAX(64)
203     }
204    
205 solar 1.128 if (fix_elf && setpax) {
206     /* set the chpax settings */
207 solar 1.129 if (elf->elf_class == ELFCLASS32) {
208     if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC)
209     ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
210     } else {
211     if (EHDR64(elf->ehdr)->e_type == ET_DYN || EHDR64(elf->ehdr)->e_type == ET_EXEC)
212     ESET(EHDR64(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
213     }
214 solar 1.128 }
215    
216 solar 1.61 /* fall back to EI_PAX if no PT_PAX was found */
217     if (!*ret) {
218 vapier 1.90 static char *paxflags;
219 solar 1.61 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
220     if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
221     *found_pax = 1;
222 solar 1.127 return (be_wewy_wewy_quiet ? NULL : paxflags);
223 solar 1.61 }
224     strncpy(ret, paxflags, sizeof(ret));
225 vapier 1.14 }
226 vapier 1.41
227 solar 1.127 if (be_wewy_wewy_quiet || (be_quiet && !shown))
228 solar 1.61 return NULL;
229 vapier 1.90 else
230     return ret;
231     }
232 solar 1.61
233 solar 1.73 static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load)
234 vapier 1.39 {
235 vapier 1.71 static char ret[12];
236 vapier 1.41 char *found;
237 vapier 1.99 unsigned long i, shown, multi_stack, multi_relro, multi_load;
238     int max_pt_load;
239 vapier 1.41
240 solar 1.73 if (!show_phdr) return NULL;
241 vapier 1.41
242 vapier 1.71 memcpy(ret, "--- --- ---\0", 12);
243    
244 vapier 1.41 shown = 0;
245 vapier 1.71 multi_stack = multi_relro = multi_load = 0;
246 vapier 1.99 max_pt_load = elf_max_pt_load(elf);
247 vapier 1.44
248 vapier 1.108 #define NOTE_GNU_STACK ".note.GNU-stack"
249 solar 1.73 #define SHOW_PHDR(B) \
250 vapier 1.39 if (elf->elf_class == ELFCLASS ## B) { \
251     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
252 vapier 1.91 Elf ## B ## _Off offset; \
253     uint32_t flags, check_flags; \
254     if (elf->phdr != NULL) { \
255     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
256     for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
257     if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
258 vapier 1.152 if (multi_stack++) \
259     warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
260     if (file_matches_list(elf->filename, qa_execstack)) \
261     continue; \
262     found = found_phdr; \
263     offset = 0; \
264     check_flags = PF_X; \
265 vapier 1.91 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
266 vapier 1.152 if (multi_relro++) \
267     warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
268 vapier 1.91 found = found_relro; \
269     offset = 4; \
270     check_flags = PF_X; \
271     } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
272 solar 1.188 if (EGET(ehdr->e_type) == ET_DYN || EGET(ehdr->e_type) == ET_EXEC) \
273 vapier 1.152 if (multi_load++ > max_pt_load) \
274     warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
275     if (file_matches_list(elf->filename, qa_wx_load)) \
276     continue; \
277     found = found_load; \
278     offset = 8; \
279     check_flags = PF_W|PF_X; \
280 vapier 1.91 } else \
281     continue; \
282     flags = EGET(phdr[i].p_flags); \
283     if (be_quiet && ((flags & check_flags) != check_flags)) \
284     continue; \
285 solar 1.130 if ((EGET(phdr[i].p_type) != PT_LOAD) && (fix_elf && ((flags & PF_X) != flags))) { \
286 vapier 1.101 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \
287     ret[3] = ret[7] = '!'; \
288     flags = EGET(phdr[i].p_flags); \
289     } \
290 vapier 1.91 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
291     *found = 1; \
292     ++shown; \
293     } \
294     } else if (elf->shdr != NULL) { \
295     /* no program headers which means this is prob an object file */ \
296     Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
297     Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
298 vapier 1.108 char *str; \
299 vapier 1.118 if ((void*)strtbl > (void*)elf->data_end) \
300 vapier 1.108 goto skip_this_shdr##B; \
301 vapier 1.91 check_flags = SHF_WRITE|SHF_EXECINSTR; \
302     for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
303     if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
304     offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
305 vapier 1.108 str = elf->data + offset; \
306     if (str > elf->data + offset + sizeof(NOTE_GNU_STACK)) continue; \
307     if (!strcmp(str, NOTE_GNU_STACK)) { \
308 vapier 1.91 if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \
309     flags = EGET(shdr[i].sh_flags); \
310     if (be_quiet && ((flags & check_flags) != check_flags)) \
311     continue; \
312     ++*found_phdr; \
313     shown = 1; \
314     if (flags & SHF_WRITE) ret[0] = 'W'; \
315     if (flags & SHF_ALLOC) ret[1] = 'A'; \
316     if (flags & SHF_EXECINSTR) ret[2] = 'X'; \
317     if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \
318     break; \
319     } \
320     } \
321 vapier 1.108 skip_this_shdr##B: \
322 vapier 1.91 if (!multi_stack) { \
323 vapier 1.158 if (file_matches_list(elf->filename, qa_execstack)) \
324     return NULL; \
325 vapier 1.91 *found_phdr = 1; \
326     shown = 1; \
327     memcpy(ret, "!WX", 3); \
328     } \
329 vapier 1.39 } \
330     }
331 solar 1.73 SHOW_PHDR(32)
332     SHOW_PHDR(64)
333 vapier 1.44
334 solar 1.127 if (be_wewy_wewy_quiet || (be_quiet && !shown))
335 vapier 1.41 return NULL;
336     else
337     return ret;
338 vapier 1.39 }
339 kevquinn 1.142
340 vapier 1.186 /*
341     * See if this ELF contains a DT_TEXTREL tag in any of its
342     * PT_DYNAMIC sections.
343     */
344 vapier 1.90 static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
345 vapier 1.39 {
346 vapier 1.90 static const char *ret = "TEXTREL";
347 vapier 1.44 unsigned long i;
348 vapier 1.41
349 vapier 1.79 if (!show_textrel && !show_textrels) return NULL;
350 vapier 1.41
351 kevquinn 1.142 if (file_matches_list(elf->filename, qa_textrels)) return NULL;
352    
353 vapier 1.44 if (elf->phdr) {
354 vapier 1.39 #define SHOW_TEXTREL(B) \
355     if (elf->elf_class == ELFCLASS ## B) { \
356     Elf ## B ## _Dyn *dyn; \
357     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
358     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
359 vapier 1.44 Elf ## B ## _Off offset; \
360 vapier 1.39 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
361 vapier 1.185 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
362 vapier 1.44 offset = EGET(phdr[i].p_offset); \
363     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
364     dyn = DYN ## B (elf->data + offset); \
365 vapier 1.39 while (EGET(dyn->d_tag) != DT_NULL) { \
366     if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
367     *found_textrel = 1; \
368     /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
369 solar 1.127 return (be_wewy_wewy_quiet ? NULL : ret); \
370 vapier 1.39 } \
371     ++dyn; \
372 vapier 1.26 } \
373 vapier 1.39 } }
374     SHOW_TEXTREL(32)
375     SHOW_TEXTREL(64)
376 vapier 1.44 }
377    
378 solar 1.127 if (be_quiet || be_wewy_wewy_quiet)
379 vapier 1.41 return NULL;
380     else
381 vapier 1.90 return " - ";
382 vapier 1.39 }
383 solar 1.180
384 vapier 1.186 /*
385     * Scan the .text section to see if there are any relocations in it.
386     * Should rewrite this to check PT_LOAD sections that are marked
387     * Executable rather than the section named '.text'.
388     */
389 vapier 1.79 static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
390 vapier 1.76 {
391 vapier 1.82 unsigned long s, r, rmax;
392     void *symtab_void, *strtab_void, *text_void;
393 vapier 1.76
394     if (!show_textrels) return NULL;
395    
396 vapier 1.79 /* don't search for TEXTREL's if the ELF doesn't have any */
397     if (!*found_textrel) scanelf_file_textrel(elf, found_textrel);
398     if (!*found_textrel) return NULL;
399    
400 vapier 1.77 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
401 vapier 1.82 text_void = elf_findsecbyname(elf, ".text");
402 vapier 1.76
403 vapier 1.82 if (symtab_void && strtab_void && text_void && elf->shdr) {
404 vapier 1.76 #define SHOW_TEXTRELS(B) \
405     if (elf->elf_class == ELFCLASS ## B) { \
406     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
407     Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
408     Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
409     Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
410 vapier 1.82 Elf ## B ## _Shdr *text = SHDR ## B (text_void); \
411     Elf ## B ## _Addr vaddr = EGET(text->sh_addr); \
412     uint ## B ## _t memsz = EGET(text->sh_size); \
413 vapier 1.76 Elf ## B ## _Rel *rel; \
414     Elf ## B ## _Rela *rela; \
415     /* search the section headers for relocations */ \
416     for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
417     uint32_t sh_type = EGET(shdr[s].sh_type); \
418     if (sh_type == SHT_REL) { \
419     rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \
420     rela = NULL; \
421     rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
422     } else if (sh_type == SHT_RELA) { \
423     rel = NULL; \
424     rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \
425     rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
426     } else \
427     continue; \
428 vapier 1.82 /* now see if any of the relocs are in the .text */ \
429     for (r = 0; r < rmax; ++r) { \
430     unsigned long sym_max; \
431     Elf ## B ## _Addr offset_tmp; \
432     Elf ## B ## _Sym *func; \
433     Elf ## B ## _Sym *sym; \
434     Elf ## B ## _Addr r_offset; \
435     uint ## B ## _t r_info; \
436     if (sh_type == SHT_REL) { \
437     r_offset = EGET(rel[r].r_offset); \
438     r_info = EGET(rel[r].r_info); \
439     } else { \
440     r_offset = EGET(rela[r].r_offset); \
441     r_info = EGET(rela[r].r_info); \
442     } \
443     /* make sure this relocation is inside of the .text */ \
444     if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
445     if (be_verbose <= 2) continue; \
446     } else \
447 vapier 1.78 *found_textrels = 1; \
448 vapier 1.82 /* locate this relocation symbol name */ \
449     sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
450 vapier 1.112 if ((void*)sym > (void*)elf->data_end) { \
451 vapier 1.111 warn("%s: corrupt ELF symbol", elf->filename); \
452 vapier 1.109 continue; \
453     } \
454 vapier 1.82 sym_max = ELF ## B ## _R_SYM(r_info); \
455     if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
456     sym += sym_max; \
457     else \
458     sym = NULL; \
459     sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
460     /* show the raw details about this reloc */ \
461 vapier 1.88 printf(" %s: ", elf->base_filename); \
462 vapier 1.82 if (sym && sym->st_name) \
463     printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \
464     else \
465 vapier 1.169 printf("(memory/data?)"); \
466 vapier 1.82 printf(" [0x%lX]", (unsigned long)r_offset); \
467     /* now try to find the closest symbol that this rel is probably in */ \
468     sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
469     func = NULL; \
470     offset_tmp = 0; \
471     while (sym_max--) { \
472     if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
473     func = sym; \
474     offset_tmp = EGET(sym->st_value); \
475 vapier 1.76 } \
476 vapier 1.82 ++sym; \
477 vapier 1.76 } \
478 vapier 1.82 printf(" in "); \
479 vapier 1.169 if (func && func->st_name) { \
480     const char *func_name = elf->data + EGET(strtab->sh_offset) + EGET(func->st_name); \
481     if (r_offset > EGET(func->st_size)) \
482     printf("(optimized out: previous %s)", func_name); \
483     else \
484     printf("%s", func_name); \
485     } else \
486     printf("(optimized out)"); \
487 vapier 1.82 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
488 solar 1.170 if (be_verbose && has_objdump) { \
489 vapier 1.187 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
490 vapier 1.167 char *sysbuf; \
491     size_t syslen; \
492     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"; \
493     syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
494     sysbuf = xmalloc(syslen); \
495 vapier 1.187 if (end_addr < r_offset) \
496     /* not uncommon when things are optimized out */ \
497     end_addr = r_offset + 0x100; \
498     snprintf(sysbuf, syslen, sysfmt, \
499     (unsigned long)offset_tmp, \
500     (unsigned long)end_addr, \
501     elf->filename, \
502     (unsigned long)r_offset); \
503     fflush(stdout); \
504     system(sysbuf); \
505     fflush(stdout); \
506     free(sysbuf); \
507 vapier 1.167 } \
508 vapier 1.76 } \
509     } }
510     SHOW_TEXTRELS(32)
511     SHOW_TEXTRELS(64)
512     }
513 vapier 1.82 if (!*found_textrels)
514     warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
515 vapier 1.76
516     return NULL;
517     }
518 solar 1.83
519 vapier 1.102 static void rpath_security_checks(elfobj *, char *, const char *);
520     static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
521 vapier 1.100 {
522 solar 1.83 struct stat st;
523 vapier 1.84 switch (*item) {
524 vapier 1.89 case '/': break;
525     case '.':
526 vapier 1.102 warnf("Security problem with relative %s '%s' in %s", dt_type, item, elf->filename);
527 vapier 1.89 break;
528 vapier 1.100 case ':':
529 vapier 1.89 case '\0':
530 vapier 1.102 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
531 solar 1.83 break;
532     case '$':
533 vapier 1.84 if (fstat(elf->fd, &st) != -1)
534 solar 1.83 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
535 vapier 1.157 warnf("Security problem with %s='%s' in %s with mode set of %o",
536 solar 1.176 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
537 solar 1.83 break;
538     default:
539 vapier 1.102 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
540 solar 1.83 break;
541     }
542     }
543 vapier 1.41 static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
544 vapier 1.39 {
545 vapier 1.48 unsigned long i, s;
546     char *rpath, *runpath, **r;
547 vapier 1.39 void *strtbl_void;
548 vapier 1.10
549 vapier 1.39 if (!show_rpath) return;
550 vapier 1.10
551 vapier 1.39 strtbl_void = elf_findsecbyname(elf, ".dynstr");
552     rpath = runpath = NULL;
553 vapier 1.10
554 vapier 1.44 if (elf->phdr && strtbl_void) {
555 vapier 1.26 #define SHOW_RPATH(B) \
556     if (elf->elf_class == ELFCLASS ## B) { \
557     Elf ## B ## _Dyn *dyn; \
558     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
559     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
560     Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
561 vapier 1.44 Elf ## B ## _Off offset; \
562 vapier 1.60 Elf ## B ## _Xword word; \
563 vapier 1.48 /* Scan all the program headers */ \
564 vapier 1.26 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
565 vapier 1.48 /* Just scan dynamic headers */ \
566 vapier 1.185 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
567 vapier 1.44 offset = EGET(phdr[i].p_offset); \
568     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
569 vapier 1.48 /* Just scan dynamic RPATH/RUNPATH headers */ \
570 vapier 1.44 dyn = DYN ## B (elf->data + offset); \
571 vapier 1.48 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
572     if (word == DT_RPATH) { \
573     r = &rpath; \
574     } else if (word == DT_RUNPATH) { \
575     r = &runpath; \
576     } else { \
577     ++dyn; \
578     continue; \
579     } \
580     /* Verify the memory is somewhat sane */ \
581     offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
582 vapier 1.69 if (offset < (Elf ## B ## _Off)elf->len) { \
583 vapier 1.48 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
584     *r = (char*)(elf->data + offset); \
585 vapier 1.103 /* cache the length in case we need to nuke this section later on */ \
586     if (fix_elf) \
587     offset = strlen(*r); \
588 vapier 1.48 /* If quiet, don't output paths in ld.so.conf */ \
589 vapier 1.69 if (be_quiet) { \
590     size_t len; \
591     char *start, *end; \
592 vapier 1.75 /* note that we only 'chop' off leading known paths. */ \
593     /* since *r is read-only memory, we can only move the ptr forward. */ \
594     start = *r; \
595     /* scan each path in : delimited list */ \
596     while (start) { \
597 vapier 1.102 rpath_security_checks(elf, start, get_elfdtype(word)); \
598 vapier 1.69 end = strchr(start, ':'); \
599 vapier 1.75 len = (end ? abs(end - start) : strlen(start)); \
600 vapier 1.102 if (use_ldcache) \
601     for (s = 0; ldpaths[s]; ++s) \
602     if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
603     *r = end; \
604     /* corner case ... if RPATH reads "/usr/lib:", we want \
605     * to show ':' rather than '' */ \
606     if (end && end[1] != '\0') \
607     (*r)++; \
608     break; \
609     } \
610 vapier 1.100 if (!*r || !end) \
611     break; \
612 vapier 1.75 else \
613     start = start + len + 1; \
614 vapier 1.69 } \
615     } \
616 vapier 1.101 if (*r) { \
617 solar 1.107 if (fix_elf > 2 || (fix_elf && **r == '\0')) { \
618 vapier 1.101 /* just nuke it */ \
619     nuke_it##B: \
620 vapier 1.103 memset(*r, 0x00, offset); \
621 vapier 1.102 *r = NULL; \
622 vapier 1.101 ESET(dyn->d_tag, DT_DEBUG); \
623 vapier 1.103 ESET(dyn->d_un.d_ptr, 0); \
624 vapier 1.101 } else if (fix_elf) { \
625     /* try to clean "bad" paths */ \
626     size_t len, tmpdir_len; \
627     char *start, *end; \
628     const char *tmpdir; \
629     start = *r; \
630     tmpdir = (getenv("TMPDIR") ? : "."); \
631     tmpdir_len = strlen(tmpdir); \
632     while (1) { \
633     end = strchr(start, ':'); \
634     if (start == end) { \
635     eat_this_path##B: \
636     len = strlen(end); \
637     memmove(start, end+1, len); \
638     start[len-1] = '\0'; \
639     end = start - 1; \
640     } else if (tmpdir && !strncmp(start, tmpdir, tmpdir_len)) { \
641     if (!end) { \
642     if (start == *r) \
643     goto nuke_it##B; \
644     *--start = '\0'; \
645     } else \
646     goto eat_this_path##B; \
647     } \
648     if (!end) \
649     break; \
650     start = end + 1; \
651     } \
652 vapier 1.102 if (**r == '\0') \
653     goto nuke_it##B; \
654 vapier 1.101 } \
655 vapier 1.102 if (*r) \
656     *found_rpath = 1; \
657 vapier 1.101 } \
658 vapier 1.26 } \
659     ++dyn; \
660     } \
661     } }
662     SHOW_RPATH(32)
663     SHOW_RPATH(64)
664 vapier 1.10 }
665 vapier 1.41
666 solar 1.127 if (be_wewy_wewy_quiet) return;
667 vapier 1.70
668 vapier 1.39 if (rpath && runpath) {
669 vapier 1.41 if (!strcmp(rpath, runpath)) {
670     xstrcat(ret, runpath, ret_len);
671     } else {
672 vapier 1.39 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath);
673 vapier 1.41 xchrcat(ret, '{', ret_len);
674     xstrcat(ret, rpath, ret_len);
675     xchrcat(ret, ',', ret_len);
676     xstrcat(ret, runpath, ret_len);
677     xchrcat(ret, '}', ret_len);
678 vapier 1.39 }
679     } else if (rpath || runpath)
680 vapier 1.41 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
681     else if (!be_quiet)
682     xstrcat(ret, " - ", ret_len);
683 vapier 1.39 }
684 solar 1.96
685     #define LDSO_CACHE_MAGIC "ld.so-"
686     #define LDSO_CACHE_MAGIC_LEN (sizeof LDSO_CACHE_MAGIC -1)
687     #define LDSO_CACHE_VER "1.7.0"
688     #define LDSO_CACHE_VER_LEN (sizeof LDSO_CACHE_VER -1)
689 vapier 1.97 #define FLAG_ANY -1
690     #define FLAG_TYPE_MASK 0x00ff
691     #define FLAG_LIBC4 0x0000
692     #define FLAG_ELF 0x0001
693     #define FLAG_ELF_LIBC5 0x0002
694     #define FLAG_ELF_LIBC6 0x0003
695     #define FLAG_REQUIRED_MASK 0xff00
696     #define FLAG_SPARC_LIB64 0x0100
697     #define FLAG_IA64_LIB64 0x0200
698     #define FLAG_X8664_LIB64 0x0300
699     #define FLAG_S390_LIB64 0x0400
700     #define FLAG_POWERPC_LIB64 0x0500
701     #define FLAG_MIPS64_LIBN32 0x0600
702     #define FLAG_MIPS64_LIBN64 0x0700
703 solar 1.96
704 vapier 1.97 static char *lookup_cache_lib(elfobj *, char *);
705 vapier 1.148
706 flameeyes 1.141 #if defined(__GLIBC__) || defined(__UCLIBC__)
707 vapier 1.148
708 vapier 1.97 static char *lookup_cache_lib(elfobj *elf, char *fname)
709 solar 1.96 {
710     int fd = 0;
711     char *strs;
712 vapier 1.104 static char buf[__PAX_UTILS_PATH_MAX] = "";
713 solar 1.96 const char *cachefile = "/etc/ld.so.cache";
714     struct stat st;
715    
716     typedef struct {
717     char magic[LDSO_CACHE_MAGIC_LEN];
718     char version[LDSO_CACHE_VER_LEN];
719     int nlibs;
720     } header_t;
721 vapier 1.97 header_t *header;
722 solar 1.96
723     typedef struct {
724     int flags;
725     int sooffset;
726     int liboffset;
727     } libentry_t;
728     libentry_t *libent;
729    
730     if (fname == NULL)
731     return NULL;
732    
733     if (ldcache == 0) {
734 vapier 1.97 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1)
735 solar 1.96 return NULL;
736 vapier 1.97
737     /* cache these values so we only map/unmap the cache file once */
738 solar 1.96 ldcache_size = st.st_size;
739 vapier 1.97 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
740    
741     close(fd);
742 solar 1.96
743 solar 1.116 if (ldcache == (caddr_t)-1) {
744     ldcache = 0;
745 solar 1.96 return NULL;
746 solar 1.116 }
747 solar 1.96
748     if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN))
749     return NULL;
750     if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
751     return NULL;
752     }
753    
754     header = (header_t *) ldcache;
755     libent = (libentry_t *) (ldcache + sizeof(header_t));
756     strs = (char *) &libent[header->nlibs];
757    
758     for (fd = 0; fd < header->nlibs; fd++) {
759 vapier 1.97 /* this should be more fine grained, but for now we assume that
760     * diff arches will not be cached together. and we ignore the
761     * the different multilib mips cases. */
762     if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
763     continue;
764     if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
765     continue;
766    
767 solar 1.96 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
768     continue;
769     strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
770     }
771     return buf;
772     }
773 solar 1.154 #elif defined(__NetBSD__)
774     static char *lookup_cache_lib(elfobj *elf, char *fname)
775     {
776     static char buf[__PAX_UTILS_PATH_MAX] = "";
777     static struct stat st;
778    
779     char **ldpath;
780     for (ldpath = ldpaths; *ldpath != NULL; ldpath++) {
781     if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", *ldpath, fname) >= sizeof(buf))
782     continue; /* if the pathname is too long, or something went wrong, ignore */
783    
784     if (stat(buf, &st) != 0)
785     continue; /* if the lib doesn't exist in *ldpath, look further */
786    
787     /* NetBSD doesn't actually do sanity checks, it just loads the file
788     * and if that doesn't work, continues looking in other directories.
789     * This cannot easily be safely emulated, unfortunately. For now,
790     * just assume that if it exists, it's a valid library. */
791 vapier 1.148
792 solar 1.154 return buf;
793     }
794    
795     /* not found in any path */
796     return NULL;
797     }
798 flameeyes 1.141 #else
799 vapier 1.192 #ifdef __ELF__
800 vapier 1.148 #warning Cache support not implemented for your target
801 vapier 1.192 #endif
802 flameeyes 1.141 static char *lookup_cache_lib(elfobj *elf, char *fname)
803     {
804     return NULL;
805     }
806     #endif
807 solar 1.96
808 vapier 1.84 static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
809 vapier 1.39 {
810 vapier 1.44 unsigned long i;
811 vapier 1.39 char *needed;
812     void *strtbl_void;
813 solar 1.96 char *p;
814 vapier 1.39
815 vapier 1.72 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
816 vapier 1.10
817 vapier 1.39 strtbl_void = elf_findsecbyname(elf, ".dynstr");
818 vapier 1.32
819 vapier 1.44 if (elf->phdr && strtbl_void) {
820 vapier 1.32 #define SHOW_NEEDED(B) \
821     if (elf->elf_class == ELFCLASS ## B) { \
822     Elf ## B ## _Dyn *dyn; \
823     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
824     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
825     Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
826 vapier 1.44 Elf ## B ## _Off offset; \
827 vapier 1.32 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
828 vapier 1.185 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
829 vapier 1.44 offset = EGET(phdr[i].p_offset); \
830     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
831     dyn = DYN ## B (elf->data + offset); \
832 vapier 1.32 while (EGET(dyn->d_tag) != DT_NULL) { \
833     if (EGET(dyn->d_tag) == DT_NEEDED) { \
834 vapier 1.44 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
835 vapier 1.69 if (offset >= (Elf ## B ## _Off)elf->len) { \
836 vapier 1.49 ++dyn; \
837     continue; \
838     } \
839 vapier 1.44 needed = (char*)(elf->data + offset); \
840 vapier 1.72 if (op == 0) { \
841 solar 1.127 if (!be_wewy_wewy_quiet) { \
842 vapier 1.72 if (*found_needed) xchrcat(ret, ',', ret_len); \
843 vapier 1.102 if (use_ldcache) \
844 vapier 1.97 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
845 solar 1.96 needed = p; \
846 vapier 1.72 xstrcat(ret, needed, ret_len); \
847     } \
848     *found_needed = 1; \
849     } else { \
850 solar 1.176 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \
851 vapier 1.81 *found_lib = 1; \
852 solar 1.127 return (be_wewy_wewy_quiet ? NULL : needed); \
853 vapier 1.81 } \
854 vapier 1.72 } \
855 vapier 1.32 } \
856     ++dyn; \
857     } \
858     } }
859     SHOW_NEEDED(32)
860     SHOW_NEEDED(64)
861 vapier 1.85 if (op == 0 && !*found_needed && be_verbose)
862 vapier 1.84 warn("ELF lacks DT_NEEDED sections: %s", elf->filename);
863 vapier 1.32 }
864 vapier 1.72
865     return NULL;
866 vapier 1.39 }
867 vapier 1.41 static char *scanelf_file_interp(elfobj *elf, char *found_interp)
868 vapier 1.39 {
869     void *strtbl_void;
870    
871 vapier 1.41 if (!show_interp) return NULL;
872 vapier 1.32
873 vapier 1.39 strtbl_void = elf_findsecbyname(elf, ".interp");
874 vapier 1.38
875 vapier 1.39 if (strtbl_void) {
876 vapier 1.38 #define SHOW_INTERP(B) \
877     if (elf->elf_class == ELFCLASS ## B) { \
878 solar 1.40 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
879     *found_interp = 1; \
880 solar 1.127 return (be_wewy_wewy_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \
881 vapier 1.38 }
882     SHOW_INTERP(32)
883     SHOW_INTERP(64)
884     }
885 vapier 1.41 return NULL;
886 vapier 1.39 }
887 vapier 1.49 static char *scanelf_file_bind(elfobj *elf, char *found_bind)
888     {
889     unsigned long i;
890     struct stat s;
891 solar 1.131 char dynamic = 0;
892 vapier 1.49
893     if (!show_bind) return NULL;
894 vapier 1.51 if (!elf->phdr) return NULL;
895 vapier 1.49
896     #define SHOW_BIND(B) \
897     if (elf->elf_class == ELFCLASS ## B) { \
898     Elf ## B ## _Dyn *dyn; \
899     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
900     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
901     Elf ## B ## _Off offset; \
902     for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
903 vapier 1.185 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
904 solar 1.131 dynamic = 1; \
905 vapier 1.49 offset = EGET(phdr[i].p_offset); \
906     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
907     dyn = DYN ## B (elf->data + offset); \
908     while (EGET(dyn->d_tag) != DT_NULL) { \
909     if (EGET(dyn->d_tag) == DT_BIND_NOW || \
910     (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
911     { \
912     if (be_quiet) return NULL; \
913     *found_bind = 1; \
914 solar 1.127 return (char *)(be_wewy_wewy_quiet ? NULL : "NOW"); \
915 vapier 1.49 } \
916     ++dyn; \
917     } \
918     } \
919     }
920     SHOW_BIND(32)
921     SHOW_BIND(64)
922    
923 solar 1.127 if (be_wewy_wewy_quiet) return NULL;
924 vapier 1.70
925 vapier 1.159 /* don't output anything if quiet mode and the ELF is static or not setuid */
926     if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
927 vapier 1.49 return NULL;
928     } else {
929     *found_bind = 1;
930 solar 1.131 return (char *) (dynamic ? "LAZY" : "STATIC");
931 vapier 1.49 }
932     }
933 vapier 1.84 static char *scanelf_file_soname(elfobj *elf, char *found_soname)
934     {
935     unsigned long i;
936     char *soname;
937     void *strtbl_void;
938    
939     if (!show_soname) return NULL;
940    
941     strtbl_void = elf_findsecbyname(elf, ".dynstr");
942    
943     if (elf->phdr && strtbl_void) {
944     #define SHOW_SONAME(B) \
945     if (elf->elf_class == ELFCLASS ## B) { \
946     Elf ## B ## _Dyn *dyn; \
947     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
948     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
949     Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
950     Elf ## B ## _Off offset; \
951     /* only look for soname in shared objects */ \
952 solar 1.188 if (EGET(ehdr->e_type) != ET_DYN) \
953 vapier 1.84 return NULL; \
954     for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
955 vapier 1.185 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
956 vapier 1.84 offset = EGET(phdr[i].p_offset); \
957     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
958     dyn = DYN ## B (elf->data + offset); \
959     while (EGET(dyn->d_tag) != DT_NULL) { \
960     if (EGET(dyn->d_tag) == DT_SONAME) { \
961     offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
962     if (offset >= (Elf ## B ## _Off)elf->len) { \
963     ++dyn; \
964     continue; \
965     } \
966     soname = (char*)(elf->data + offset); \
967     *found_soname = 1; \
968 solar 1.127 return (be_wewy_wewy_quiet ? NULL : soname); \
969 vapier 1.84 } \
970     ++dyn; \
971     } \
972     } }
973     SHOW_SONAME(32)
974     SHOW_SONAME(64)
975     }
976    
977     return NULL;
978     }
979 solar 1.177
980 flameeyes 1.198 static int scanelf_match_symname(const char *symname, const char *tomatch) {
981 flameeyes 1.197 /* We do things differently when checking with regexp */
982     if (g_match) {
983 flameeyes 1.198 return rematch(symname, tomatch, REG_EXTENDED) == 0;
984 flameeyes 1.197 } else {
985     const size_t symname_len = strlen(symname);
986 flameeyes 1.198 return (strncmp(symname, tomatch, symname_len) == 0 &&
987     /* Accept unversioned symbol names */
988     (tomatch[symname_len] == '\0' || tomatch[symname_len] == '@'));
989 flameeyes 1.197 }
990     }
991    
992 vapier 1.72 static char *scanelf_file_sym(elfobj *elf, char *found_sym)
993 vapier 1.39 {
994 vapier 1.44 unsigned long i;
995 vapier 1.95 char *ret;
996 vapier 1.39 void *symtab_void, *strtab_void;
997 vapier 1.38
998 vapier 1.41 if (!find_sym) return NULL;
999 vapier 1.95 ret = find_sym;
1000 vapier 1.32
1001 vapier 1.77 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
1002 vapier 1.27
1003 vapier 1.39 if (symtab_void && strtab_void) {
1004 vapier 1.27 #define FIND_SYM(B) \
1005     if (elf->elf_class == ELFCLASS ## B) { \
1006     Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
1007     Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
1008     Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
1009 vapier 1.115 unsigned long cnt = EGET(symtab->sh_entsize); \
1010 vapier 1.27 char *symname; \
1011 vapier 1.115 if (cnt) \
1012     cnt = EGET(symtab->sh_size) / cnt; \
1013 vapier 1.27 for (i = 0; i < cnt; ++i) { \
1014 flameeyes 1.196 if ((void*)sym > (void*)elf->data_end) { \
1015 flameeyes 1.195 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1016     goto break_out; \
1017     } \
1018 vapier 1.27 if (sym->st_name) { \
1019 vapier 1.134 /* make sure the symbol name is in acceptable memory range */ \
1020 vapier 1.27 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
1021 vapier 1.115 if ((void*)symname > (void*)elf->data_end) { \
1022     warnf("%s: corrupt ELF symbols", elf->filename); \
1023 vapier 1.134 ++sym; \
1024 vapier 1.111 continue; \
1025     } \
1026 vapier 1.134 /* debug display ... show all symbols and some extra info */ \
1027 flameeyes 1.197 if (0 && g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \
1028 solar 1.177 printf("%s(%s) %5lX %15s %s %s\n", \
1029 vapier 1.39 ((*found_sym == 0) ? "\n\t" : "\t"), \
1030 vapier 1.76 elf->base_filename, \
1031 vapier 1.94 (unsigned long)sym->st_size, \
1032 vapier 1.95 get_elfstttype(sym->st_info), \
1033 solar 1.177 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1034 vapier 1.39 *found_sym = 1; \
1035 vapier 1.95 } else { \
1036 vapier 1.134 /* allow the user to specify a comma delimited list of symbols to search for */ \
1037 flameeyes 1.198 char *this_sym, *next_sym; \
1038 flameeyes 1.197 next_sym = ret; \
1039     while (next_sym) { \
1040     this_sym = next_sym; \
1041     if ((next_sym = strchr(this_sym, ','))) \
1042 grobian 1.200 next_sym += 1; /* Skip the comma */ \
1043 vapier 1.134 /* do we want a defined symbol ? */ \
1044     if (*this_sym == '+') { \
1045 vapier 1.140 if (sym->st_shndx == SHN_UNDEF) \
1046 flameeyes 1.197 continue; \
1047 vapier 1.134 ++this_sym; \
1048     /* do we want an undefined symbol ? */ \
1049     } else if (*this_sym == '-') { \
1050 vapier 1.140 if (sym->st_shndx != SHN_UNDEF) \
1051 flameeyes 1.197 continue; \
1052 vapier 1.134 ++this_sym; \
1053     } \
1054 grobian 1.200 if (next_sym) /* Copy it so that we don't have to worry about the final , */ \
1055     this_sym = strndup(this_sym, next_sym-this_sym); \
1056 vapier 1.134 /* ok, lets compare the name now */ \
1057 flameeyes 1.198 if (scanelf_match_symname(this_sym, symname)) { \
1058 solar 1.132 if (be_semi_verbose) { \
1059     char buf[126]; \
1060     snprintf(buf, sizeof(buf), "%lX %s %s", \
1061     (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1062     ret = buf; \
1063     } else \
1064 flameeyes 1.197 ret = symname; \
1065 vapier 1.95 (*found_sym)++; \
1066     goto break_out; \
1067     } \
1068 grobian 1.200 if (next_sym) free(this_sym); \
1069 flameeyes 1.197 } \
1070 vapier 1.95 } \
1071 vapier 1.27 } \
1072     ++sym; \
1073     } }
1074     FIND_SYM(32)
1075     FIND_SYM(64)
1076 vapier 1.39 }
1077 vapier 1.70
1078 vapier 1.95 break_out:
1079 solar 1.127 if (be_wewy_wewy_quiet) return NULL;
1080 vapier 1.70
1081 vapier 1.41 if (*find_sym != '*' && *found_sym)
1082 vapier 1.95 return ret;
1083 vapier 1.41 if (be_quiet)
1084     return NULL;
1085     else
1086 solar 1.68 return (char *)" - ";
1087 vapier 1.39 }
1088 solar 1.119
1089 solar 1.124 static char *scanelf_file_sections(elfobj *elf, char *found_section)
1090     {
1091     if (!find_section)
1092     return NULL;
1093    
1094     #define FIND_SECTION(B) \
1095     if (elf->elf_class == ELFCLASS ## B) { \
1096 solar 1.136 int invert; \
1097 solar 1.124 Elf ## B ## _Shdr *section; \
1098 solar 1.136 invert = (*find_section == '!' ? 1 : 0); \
1099     section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \
1100     if ((section == NULL && invert) || (section != NULL && !invert)) \
1101 solar 1.124 *found_section = 1; \
1102     }
1103     FIND_SECTION(32)
1104     FIND_SECTION(64)
1105    
1106 vapier 1.138 if (be_wewy_wewy_quiet)
1107     return NULL;
1108 solar 1.124
1109     if (*found_section)
1110     return find_section;
1111    
1112     if (be_quiet)
1113     return NULL;
1114     else
1115     return (char *)" - ";
1116     }
1117    
1118 vapier 1.39 /* scan an elf file and show all the fun stuff */
1119 solar 1.57 #define prints(str) write(fileno(stdout), str, strlen(str))
1120 vapier 1.106 static int scanelf_elfobj(elfobj *elf)
1121 vapier 1.39 {
1122 vapier 1.44 unsigned long i;
1123 vapier 1.162 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1124     found_rpath, found_needed, found_interp, found_bind, found_soname,
1125 solar 1.124 found_sym, found_lib, found_file, found_textrels, found_section;
1126 vapier 1.41 static char *out_buffer = NULL;
1127     static size_t out_len;
1128 vapier 1.39
1129 vapier 1.76 found_pax = found_phdr = found_relro = found_load = found_textrel = \
1130 vapier 1.84 found_rpath = found_needed = found_interp = found_bind = found_soname = \
1131 solar 1.124 found_sym = found_lib = found_file = found_textrels = found_section = 0;
1132 vapier 1.39
1133 vapier 1.114 if (be_verbose > 2)
1134 vapier 1.106 printf("%s: scanning file {%s,%s}\n", elf->filename,
1135 vapier 1.69 get_elfeitype(EI_CLASS, elf->elf_class),
1136     get_elfeitype(EI_DATA, elf->data[EI_DATA]));
1137 vapier 1.114 else if (be_verbose > 1)
1138 vapier 1.106 printf("%s: scanning file\n", elf->filename);
1139 vapier 1.39
1140 vapier 1.41 /* init output buffer */
1141     if (!out_buffer) {
1142     out_len = sizeof(char) * 80;
1143 vapier 1.186 out_buffer = xmalloc(out_len);
1144 vapier 1.41 }
1145     *out_buffer = '\0';
1146    
1147 vapier 1.39 /* show the header */
1148     if (!be_quiet && show_banner) {
1149 vapier 1.49 for (i = 0; out_format[i]; ++i) {
1150 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
1151 vapier 1.41
1152     switch (out_format[++i]) {
1153 solar 1.132 case '+': break;
1154 vapier 1.41 case '%': break;
1155 vapier 1.70 case '#': break;
1156 vapier 1.66 case 'F':
1157     case 'p':
1158     case 'f': prints("FILE "); found_file = 1; break;
1159 vapier 1.41 case 'o': prints(" TYPE "); break;
1160     case 'x': prints(" PAX "); break;
1161 vapier 1.71 case 'e': prints("STK/REL/PTL "); break;
1162 vapier 1.41 case 't': prints("TEXTREL "); break;
1163     case 'r': prints("RPATH "); break;
1164 vapier 1.171 case 'M': prints("CLASS "); break;
1165 vapier 1.41 case 'n': prints("NEEDED "); break;
1166     case 'i': prints("INTERP "); break;
1167 vapier 1.49 case 'b': prints("BIND "); break;
1168 solar 1.190 case 'Z': prints("SIZE "); break;
1169 vapier 1.84 case 'S': prints("SONAME "); break;
1170 vapier 1.41 case 's': prints("SYM "); break;
1171 vapier 1.72 case 'N': prints("LIB "); break;
1172 vapier 1.76 case 'T': prints("TEXTRELS "); break;
1173 vapier 1.126 case 'k': prints("SECTION "); break;
1174 vapier 1.166 case 'a': prints("ARCH "); break;
1175 solar 1.191 case 'I': prints("OSABI "); break;
1176     case 'Y': prints("EABI "); break;
1177 solar 1.180 case 'O': prints("PERM "); break;
1178 solar 1.181 case 'D': prints("ENDIAN "); break;
1179 vapier 1.76 default: warnf("'%c' has no title ?", out_format[i]);
1180 vapier 1.39 }
1181 vapier 1.27 }
1182 vapier 1.49 if (!found_file) prints("FILE ");
1183 vapier 1.41 prints("\n");
1184 vapier 1.49 found_file = 0;
1185 vapier 1.39 show_banner = 0;
1186     }
1187    
1188     /* dump all the good stuff */
1189 vapier 1.49 for (i = 0; out_format[i]; ++i) {
1190 vapier 1.41 const char *out;
1191 vapier 1.66 const char *tmp;
1192 solar 1.190 static char ubuf[sizeof(unsigned long)*2];
1193 vapier 1.70 if (!IS_MODIFIER(out_format[i])) {
1194 vapier 1.41 xchrcat(&out_buffer, out_format[i], &out_len);
1195     continue;
1196     }
1197 vapier 1.39
1198 vapier 1.41 out = NULL;
1199 solar 1.127 be_wewy_wewy_quiet = (out_format[i] == '#');
1200 solar 1.132 be_semi_verbose = (out_format[i] == '+');
1201 vapier 1.41 switch (out_format[++i]) {
1202 solar 1.132 case '+':
1203 vapier 1.70 case '%':
1204     case '#':
1205     xchrcat(&out_buffer, out_format[i], &out_len); break;
1206     case 'F':
1207 vapier 1.76 found_file = 1;
1208 solar 1.127 if (be_wewy_wewy_quiet) break;
1209 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
1210 vapier 1.70 break;
1211 vapier 1.66 case 'p':
1212 vapier 1.76 found_file = 1;
1213 solar 1.127 if (be_wewy_wewy_quiet) break;
1214 vapier 1.106 tmp = elf->filename;
1215 vapier 1.66 if (search_path) {
1216     ssize_t len_search = strlen(search_path);
1217 vapier 1.106 ssize_t len_file = strlen(elf->filename);
1218     if (!strncmp(elf->filename, search_path, len_search) && \
1219 vapier 1.66 len_file > len_search)
1220     tmp += len_search;
1221     if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
1222     }
1223     xstrcat(&out_buffer, tmp, &out_len);
1224     break;
1225     case 'f':
1226 vapier 1.76 found_file = 1;
1227 solar 1.127 if (be_wewy_wewy_quiet) break;
1228 vapier 1.106 tmp = strrchr(elf->filename, '/');
1229     tmp = (tmp == NULL ? elf->filename : tmp+1);
1230 vapier 1.66 xstrcat(&out_buffer, tmp, &out_len);
1231     break;
1232 vapier 1.41 case 'o': out = get_elfetype(elf); break;
1233     case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1234 solar 1.73 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
1235 vapier 1.41 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1236 vapier 1.79 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
1237 vapier 1.41 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1238 vapier 1.171 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1239 solar 1.181 case 'D': out = get_endian(elf); break;
1240 solar 1.180 case 'O': out = getstr_perms(elf->filename); break;
1241 vapier 1.72 case 'n':
1242     case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
1243 vapier 1.41 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1244 vapier 1.49 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1245 vapier 1.84 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1246 vapier 1.72 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1247 solar 1.124 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1248 vapier 1.166 case 'a': out = get_elfemtype(elf); break;
1249 solar 1.191 case 'I': out = get_elfosabi(elf); break;
1250     case 'Y': out = get_elf_eabi(elf); break;
1251 vapier 1.193 case 'Z': snprintf(ubuf, sizeof(ubuf), "%lu", (unsigned long)elf->len); out = ubuf; break;;
1252 vapier 1.76 default: warnf("'%c' has no scan code?", out_format[i]);
1253 vapier 1.29 }
1254 vapier 1.95 if (out) {
1255     /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1256     if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1257     xstrncat(&out_buffer, out, &out_len, (tmp-out));
1258     else
1259     xstrcat(&out_buffer, out, &out_len);
1260     }
1261 vapier 1.39 }
1262    
1263 vapier 1.54 #define FOUND_SOMETHING() \
1264 solar 1.73 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1265 vapier 1.76 found_rpath || found_needed || found_interp || found_bind || \
1266 solar 1.124 found_soname || found_sym || found_lib || found_textrels || found_section )
1267 vapier 1.54
1268     if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
1269     xchrcat(&out_buffer, ' ', &out_len);
1270 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
1271 vapier 1.27 }
1272 vapier 1.79 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
1273 vapier 1.41 puts(out_buffer);
1274 vapier 1.79 fflush(stdout);
1275     }
1276 vapier 1.10
1277 vapier 1.105 return 0;
1278     }
1279    
1280 vapier 1.106 /* scan a single elf */
1281     static int scanelf_elf(const char *filename, int fd, size_t len)
1282     {
1283 solar 1.120 int ret = 1;
1284 vapier 1.106 elfobj *elf;
1285    
1286     /* verify this is real ELF */
1287     if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1288     if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1289 solar 1.120 return ret;
1290     }
1291     switch (match_bits) {
1292     case 32:
1293     if (elf->elf_class != ELFCLASS32)
1294     goto label_done;
1295     break;
1296     case 64:
1297     if (elf->elf_class != ELFCLASS64)
1298     goto label_done;
1299     break;
1300     default: break;
1301 vapier 1.106 }
1302 solar 1.119 if (strlen(match_etypes)) {
1303     char sbuf[126];
1304     strncpy(sbuf, match_etypes, sizeof(sbuf));
1305     if (strchr(match_etypes, ',') != NULL) {
1306     char *p;
1307 vapier 1.186 while ((p = strrchr(sbuf, ',')) != NULL) {
1308 solar 1.119 *p = 0;
1309 solar 1.129 if (etype_lookup(p+1) == get_etype(elf))
1310 solar 1.119 goto label_ret;
1311     }
1312     }
1313 solar 1.129 if (etype_lookup(sbuf) != get_etype(elf))
1314 solar 1.119 goto label_done;
1315     }
1316    
1317     label_ret:
1318 vapier 1.106 ret = scanelf_elfobj(elf);
1319 solar 1.119
1320     label_done:
1321 vapier 1.106 unreadelf(elf);
1322     return ret;
1323     }
1324 solar 1.119
1325 vapier 1.105 /* scan an archive of elfs */
1326 vapier 1.106 static int scanelf_archive(const char *filename, int fd, size_t len)
1327 vapier 1.105 {
1328 vapier 1.106 archive_handle *ar;
1329 vapier 1.105 archive_member *m;
1330 vapier 1.106 char *ar_buffer;
1331     elfobj *elf;
1332    
1333     ar = ar_open_fd(filename, fd);
1334     if (ar == NULL)
1335     return 1;
1336    
1337     ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1338     while ((m=ar_next(ar)) != NULL) {
1339     elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1340     if (elf) {
1341     scanelf_elfobj(elf);
1342     unreadelf(elf);
1343     }
1344     }
1345     munmap(ar_buffer, len);
1346    
1347 vapier 1.105 return 0;
1348     }
1349     /* scan a file which may be an elf or an archive or some other magical beast */
1350 solar 1.164 static int scanelf_file(const char *filename, const struct stat *st_cache)
1351 vapier 1.105 {
1352 vapier 1.161 const struct stat *st = st_cache;
1353     struct stat symlink_st;
1354 vapier 1.106 int fd;
1355 vapier 1.105
1356     /* always handle regular files and handle symlinked files if no -y */
1357 vapier 1.161 if (S_ISLNK(st->st_mode)) {
1358 solar 1.164 if (!scan_symlink) return 1;
1359 vapier 1.161 stat(filename, &symlink_st);
1360     st = &symlink_st;
1361 vapier 1.105 }
1362 vapier 1.161
1363     if (!S_ISREG(st->st_mode)) {
1364 vapier 1.105 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1365 solar 1.164 return 1;
1366 vapier 1.105 }
1367    
1368 solar 1.180 if (match_perms) {
1369     if ((st->st_mode | match_perms) != st->st_mode)
1370     return 1;
1371     }
1372 vapier 1.106 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1373 solar 1.164 return 1;
1374 vapier 1.106
1375 vapier 1.161 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1376 vapier 1.105 /* if it isn't an ELF, maybe it's an .a archive */
1377 vapier 1.161 scanelf_archive(filename, fd, st->st_size);
1378 vapier 1.106
1379     close(fd);
1380 solar 1.164 return 0;
1381 solar 1.6 }
1382    
1383 solar 1.1 /* scan a directory for ET_EXEC files and print when we find one */
1384 solar 1.164 static int scanelf_dir(const char *path)
1385 solar 1.1 {
1386 vapier 1.10 register DIR *dir;
1387     register struct dirent *dentry;
1388 vapier 1.14 struct stat st_top, st;
1389 vapier 1.104 char buf[__PAX_UTILS_PATH_MAX];
1390 vapier 1.32 size_t pathlen = 0, len = 0;
1391 solar 1.164 int ret = 0;
1392 vapier 1.10
1393     /* make sure path exists */
1394 vapier 1.39 if (lstat(path, &st_top) == -1) {
1395     if (be_verbose > 2) printf("%s: does not exist\n", path);
1396 solar 1.164 return 1;
1397 vapier 1.39 }
1398 solar 1.11
1399 vapier 1.10 /* ok, if it isn't a directory, assume we can open it */
1400 vapier 1.14 if (!S_ISDIR(st_top.st_mode)) {
1401 solar 1.164 return scanelf_file(path, &st_top);
1402 vapier 1.10 }
1403    
1404     /* now scan the dir looking for fun stuff */
1405     if ((dir = opendir(path)) == NULL) {
1406     warnf("could not opendir %s: %s", path, strerror(errno));
1407 solar 1.164 return 1;
1408 vapier 1.10 }
1409 vapier 1.114 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1410 solar 1.11
1411 vapier 1.32 pathlen = strlen(path);
1412 vapier 1.10 while ((dentry = readdir(dir))) {
1413     if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
1414     continue;
1415 vapier 1.32 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
1416     if (len >= sizeof(buf)) {
1417 vapier 1.76 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1418     (unsigned long)len, (unsigned long)sizeof(buf));
1419 vapier 1.32 continue;
1420     }
1421 solar 1.143 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
1422 solar 1.20 if (lstat(buf, &st) != -1) {
1423 vapier 1.10 if (S_ISREG(st.st_mode))
1424 solar 1.164 ret = scanelf_file(buf, &st);
1425 vapier 1.10 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1426 vapier 1.14 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1427 solar 1.164 ret = scanelf_dir(buf);
1428 vapier 1.10 }
1429     }
1430     }
1431     closedir(dir);
1432 solar 1.164 return ret;
1433 solar 1.1 }
1434    
1435 vapier 1.133 static int scanelf_from_file(const char *filename)
1436 vapier 1.47 {
1437 solar 1.45 FILE *fp = NULL;
1438     char *p;
1439 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1440 solar 1.164 int ret = 0;
1441 solar 1.45
1442 solar 1.132 if (strcmp(filename, "-") == 0)
1443 solar 1.45 fp = stdin;
1444     else if ((fp = fopen(filename, "r")) == NULL)
1445     return 1;
1446    
1447 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1448 solar 1.45 if ((p = strchr(path, '\n')) != NULL)
1449     *p = 0;
1450 vapier 1.66 search_path = path;
1451 solar 1.164 ret = scanelf_dir(path);
1452 solar 1.45 }
1453     if (fp != stdin)
1454     fclose(fp);
1455 solar 1.164 return ret;
1456 solar 1.45 }
1457    
1458 solar 1.154 #if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1459 vapier 1.148
1460     static int load_ld_cache_config(int i, const char *fname)
1461 vapier 1.48 {
1462     FILE *fp = NULL;
1463     char *p;
1464 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1465 vapier 1.48
1466 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1467 solar 1.123 return i;
1468    
1469     if ((fp = fopen(fname, "r")) == NULL)
1470     return i;
1471 vapier 1.48
1472 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1473 vapier 1.48 if ((p = strrchr(path, '\r')) != NULL)
1474     *p = 0;
1475     if ((p = strchr(path, '\n')) != NULL)
1476     *p = 0;
1477 solar 1.154 #ifdef __linux__
1478 vapier 1.186 /* recursive includes of the same file will make this segfault. */
1479 solar 1.129 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1480 solar 1.123 glob64_t gl;
1481     size_t x;
1482     char gpath[__PAX_UTILS_PATH_MAX];
1483    
1484 solar 1.129 memset(gpath, 0, sizeof(gpath));
1485 solar 1.123
1486     if (path[8] != '/')
1487 solar 1.129 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]);
1488 solar 1.123 else
1489 solar 1.129 strncpy(gpath, &path[8], sizeof(gpath));
1490 solar 1.123
1491     if ((glob64(gpath, 0, NULL, &gl)) == 0) {
1492     for (x = 0; x < gl.gl_pathc; ++x) {
1493     /* try to avoid direct loops */
1494     if (strcmp(gl.gl_pathv[x], fname) == 0)
1495     continue;
1496 vapier 1.148 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1497 vapier 1.149 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1498 solar 1.123 globfree64(&gl);
1499     return i;
1500     }
1501     }
1502     globfree64 (&gl);
1503     continue;
1504 solar 1.160 }
1505 solar 1.123 }
1506 solar 1.154 #endif
1507 solar 1.123 if (*path != '/')
1508     continue;
1509 vapier 1.48
1510     ldpaths[i++] = xstrdup(path);
1511    
1512 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1513 vapier 1.48 break;
1514     }
1515     ldpaths[i] = NULL;
1516    
1517     fclose(fp);
1518 solar 1.123 return i;
1519 vapier 1.48 }
1520 flameeyes 1.141
1521 vapier 1.148 #elif defined(__FreeBSD__) || (__DragonFly__)
1522    
1523     static int load_ld_cache_config(int i, const char *fname)
1524 flameeyes 1.141 {
1525     FILE *fp = NULL;
1526     char *b = NULL, *p;
1527     struct elfhints_hdr hdr;
1528 vapier 1.152
1529 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1530 flameeyes 1.141 return i;
1531    
1532     if ((fp = fopen(fname, "r")) == NULL)
1533     return i;
1534    
1535 vapier 1.152 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1536     hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1537     fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1538     {
1539 flameeyes 1.141 fclose(fp);
1540     return i;
1541     }
1542 vapier 1.152
1543 vapier 1.186 b = xmalloc(hdr.dirlistlen + 1);
1544 vapier 1.152 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1545 flameeyes 1.141 fclose(fp);
1546     free(b);
1547     return i;
1548     }
1549 vapier 1.152
1550     while ((p = strsep(&b, ":"))) {
1551     if (*p == '\0') continue;
1552 flameeyes 1.141 ldpaths[i++] = xstrdup(p);
1553 vapier 1.152
1554 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1555 flameeyes 1.141 break;
1556     }
1557     ldpaths[i] = NULL;
1558 vapier 1.157
1559 flameeyes 1.141 free(b);
1560     fclose(fp);
1561     return i;
1562     }
1563 vapier 1.148
1564     #else
1565 vapier 1.192 #ifdef __ELF__
1566 vapier 1.148 #warning Cache config support not implemented for your target
1567 vapier 1.192 #endif
1568 vapier 1.148 static int load_ld_cache_config(int i, const char *fname)
1569     {
1570     memset(ldpaths, 0x00, sizeof(ldpaths));
1571 vapier 1.192 return 0;
1572 vapier 1.148 }
1573 flameeyes 1.141 #endif
1574 vapier 1.48
1575 vapier 1.10 /* scan /etc/ld.so.conf for paths */
1576 vapier 1.184 static void scanelf_ldpath(void)
1577 vapier 1.10 {
1578 vapier 1.17 char scan_l, scan_ul, scan_ull;
1579 vapier 1.48 int i = 0;
1580 vapier 1.10
1581 vapier 1.48 if (!ldpaths[0])
1582     err("Unable to load any paths from ld.so.conf");
1583 vapier 1.10
1584 vapier 1.17 scan_l = scan_ul = scan_ull = 0;
1585    
1586 vapier 1.48 while (ldpaths[i]) {
1587     if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
1588     if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
1589     if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
1590     scanelf_dir(ldpaths[i]);
1591     ++i;
1592     }
1593 vapier 1.10
1594 vapier 1.17 if (!scan_l) scanelf_dir("/lib");
1595     if (!scan_ul) scanelf_dir("/usr/lib");
1596     if (!scan_ull) scanelf_dir("/usr/local/lib");
1597 vapier 1.10 }
1598 solar 1.1
1599 vapier 1.10 /* scan env PATH for paths */
1600 vapier 1.184 static void scanelf_envpath(void)
1601 solar 1.1 {
1602 solar 1.34 char *path, *p;
1603 vapier 1.10
1604     path = getenv("PATH");
1605     if (!path)
1606     err("PATH is not set in your env !");
1607 vapier 1.41 path = xstrdup(path);
1608 vapier 1.10
1609     while ((p = strrchr(path, ':')) != NULL) {
1610     scanelf_dir(p + 1);
1611     *p = 0;
1612     }
1613 vapier 1.17
1614 solar 1.34 free(path);
1615 solar 1.1 }
1616    
1617 solar 1.191 /* usage / invocation handling functions */ /* Free Flags: c d j u w C G H J K P Q U W */
1618     #define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZBhV"
1619 vapier 1.27 #define a_argument required_argument
1620 vapier 1.10 static struct option const long_opts[] = {
1621     {"path", no_argument, NULL, 'p'},
1622     {"ldpath", no_argument, NULL, 'l'},
1623     {"recursive", no_argument, NULL, 'R'},
1624 vapier 1.14 {"mount", no_argument, NULL, 'm'},
1625 vapier 1.37 {"symlink", no_argument, NULL, 'y'},
1626 vapier 1.105 {"archives", no_argument, NULL, 'A'},
1627     {"ldcache", no_argument, NULL, 'L'},
1628 vapier 1.101 {"fix", no_argument, NULL, 'X'},
1629 solar 1.127 {"setpax", a_argument, NULL, 'z'},
1630 vapier 1.10 {"pax", no_argument, NULL, 'x'},
1631 solar 1.16 {"header", no_argument, NULL, 'e'},
1632 vapier 1.10 {"textrel", no_argument, NULL, 't'},
1633     {"rpath", no_argument, NULL, 'r'},
1634 vapier 1.32 {"needed", no_argument, NULL, 'n'},
1635 vapier 1.38 {"interp", no_argument, NULL, 'i'},
1636 vapier 1.49 {"bind", no_argument, NULL, 'b'},
1637 vapier 1.84 {"soname", no_argument, NULL, 'S'},
1638 vapier 1.76 {"symbol", a_argument, NULL, 's'},
1639 solar 1.124 {"section", a_argument, NULL, 'k'},
1640 vapier 1.76 {"lib", a_argument, NULL, 'N'},
1641 solar 1.86 {"gmatch", no_argument, NULL, 'g'},
1642 vapier 1.76 {"textrels", no_argument, NULL, 'T'},
1643 solar 1.119 {"etype", a_argument, NULL, 'E'},
1644 solar 1.120 {"bits", a_argument, NULL, 'M'},
1645 solar 1.181 {"endian", no_argument, NULL, 'D'},
1646 solar 1.191 {"osabi", no_argument, NULL, 'I'},
1647     {"eabi", no_argument, NULL, 'Y'},
1648 solar 1.180 {"perms", a_argument, NULL, 'O'},
1649 solar 1.190 {"size", no_argument, NULL, 'Z'},
1650 vapier 1.10 {"all", no_argument, NULL, 'a'},
1651     {"quiet", no_argument, NULL, 'q'},
1652 vapier 1.14 {"verbose", no_argument, NULL, 'v'},
1653 vapier 1.76 {"format", a_argument, NULL, 'F'},
1654     {"from", a_argument, NULL, 'f'},
1655     {"file", a_argument, NULL, 'o'},
1656 solar 1.16 {"nobanner", no_argument, NULL, 'B'},
1657 vapier 1.10 {"help", no_argument, NULL, 'h'},
1658     {"version", no_argument, NULL, 'V'},
1659     {NULL, no_argument, NULL, 0x0}
1660     };
1661 solar 1.57
1662 solar 1.68 static const char *opts_help[] = {
1663 vapier 1.10 "Scan all directories in PATH environment",
1664     "Scan all directories in /etc/ld.so.conf",
1665 vapier 1.14 "Scan directories recursively",
1666 vapier 1.37 "Don't recursively cross mount points",
1667 vapier 1.101 "Don't scan symlinks",
1668 vapier 1.105 "Scan archives (.a files)",
1669     "Utilize ld.so.cache information (use with -r/-n)",
1670 solar 1.127 "Try and 'fix' bad things (use with -r/-e)",
1671     "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
1672 vapier 1.10 "Print PaX markings",
1673 vapier 1.71 "Print GNU_STACK/PT_LOAD markings",
1674 vapier 1.10 "Print TEXTREL information",
1675     "Print RPATH information",
1676 vapier 1.32 "Print NEEDED information",
1677 vapier 1.38 "Print INTERP information",
1678 vapier 1.49 "Print BIND information",
1679 vapier 1.84 "Print SONAME information",
1680 vapier 1.27 "Find a specified symbol",
1681 solar 1.124 "Find a specified section",
1682 vapier 1.72 "Find a specified library",
1683 solar 1.86 "Use strncmp to match libraries. (use with -N)",
1684 vapier 1.76 "Locate cause of TEXTREL",
1685 solar 1.129 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1686 solar 1.120 "Print only ELF files matching numeric bits",
1687 solar 1.181 "Print Endianness",
1688 solar 1.191 "Print OSABI",
1689     "Print EABI (EM_ARM Only)",
1690 solar 1.180 "Print only ELF files matching octal permissions",
1691 solar 1.190 "Print ELF file size",
1692 vapier 1.82 "Print all scanned info (-x -e -t -r -b)\n",
1693 vapier 1.14 "Only output 'bad' things",
1694     "Be verbose (can be specified more than once)",
1695 vapier 1.39 "Use specified format for output",
1696 solar 1.45 "Read input stream from a filename",
1697 vapier 1.24 "Write output stream to a filename",
1698 vapier 1.14 "Don't display the header",
1699 vapier 1.10 "Print this help and exit",
1700     "Print version and exit",
1701     NULL
1702     };
1703    
1704     /* display usage and exit */
1705     static void usage(int status)
1706 solar 1.1 {
1707 vapier 1.44 unsigned long i;
1708 solar 1.52 printf("* Scan ELF binaries for stuff\n\n"
1709 vapier 1.105 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1710 solar 1.35 printf("Options: -[%s]\n", PARSE_FLAGS);
1711 vapier 1.10 for (i = 0; long_opts[i].name; ++i)
1712 vapier 1.27 if (long_opts[i].has_arg == no_argument)
1713 vapier 1.157 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1714 vapier 1.27 long_opts[i].name, opts_help[i]);
1715     else
1716 solar 1.124 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1717 vapier 1.27 long_opts[i].name, opts_help[i]);
1718 solar 1.45
1719 vapier 1.173 puts("\nFor more information, see the scanelf(1) manpage");
1720 vapier 1.10 exit(status);
1721 solar 1.1 }
1722    
1723     /* parse command line arguments and preform needed actions */
1724 vapier 1.165 #define do_pax_state(option, flag) \
1725     if (islower(option)) { \
1726     flags &= ~PF_##flag; \
1727     flags |= PF_NO##flag; \
1728     } else { \
1729     flags &= ~PF_NO##flag; \
1730     flags |= PF_##flag; \
1731     }
1732 solar 1.164 static int parseargs(int argc, char *argv[])
1733 vapier 1.10 {
1734 vapier 1.48 int i;
1735 vapier 1.133 const char *from_file = NULL;
1736 solar 1.164 int ret = 0;
1737 vapier 1.10
1738     opterr = 0;
1739 vapier 1.48 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1740     switch (i) {
1741 vapier 1.10
1742 vapier 1.39 case 'V':
1743 vapier 1.80 printf("pax-utils-%s: %s compiled %s\n%s\n"
1744     "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
1745     VERSION, __FILE__, __DATE__, rcsid, argv0);
1746 vapier 1.10 exit(EXIT_SUCCESS);
1747     break;
1748     case 'h': usage(EXIT_SUCCESS); break;
1749 solar 1.45 case 'f':
1750 vapier 1.100 if (from_file) warn("You prob don't want to specify -f twice");
1751     from_file = optarg;
1752 solar 1.45 break;
1753 solar 1.119 case 'E':
1754     strncpy(match_etypes, optarg, sizeof(match_etypes));
1755     break;
1756 solar 1.120 case 'M':
1757     match_bits = atoi(optarg);
1758 solar 1.182 if (match_bits == 0) {
1759     if (strcmp(optarg, "ELFCLASS32") == 0)
1760     match_bits = 32;
1761     if (strcmp(optarg, "ELFCLASS64") == 0)
1762     match_bits = 64;
1763     }
1764 solar 1.120 break;
1765 solar 1.180 case 'O':
1766     if (sscanf(optarg, "%o", &match_perms) == (-1))
1767     match_bits = 0;
1768     break;
1769 vapier 1.24 case 'o': {
1770 vapier 1.146 if (freopen(optarg, "w", stdout) == NULL)
1771 vapier 1.24 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1772 solar 1.21 break;
1773     }
1774 solar 1.124 case 'k':
1775 vapier 1.126 if (find_section) warn("You prob don't want to specify -k twice");
1776 solar 1.124 find_section = optarg;
1777     break;
1778 vapier 1.39 case 's': {
1779 vapier 1.93 if (find_sym) warn("You prob don't want to specify -s twice");
1780     find_sym = optarg;
1781 vapier 1.39 break;
1782     }
1783 vapier 1.72 case 'N': {
1784 vapier 1.93 if (find_lib) warn("You prob don't want to specify -N twice");
1785     find_lib = optarg;
1786 vapier 1.72 break;
1787     }
1788 vapier 1.39
1789     case 'F': {
1790 vapier 1.93 if (out_format) warn("You prob don't want to specify -F twice");
1791     out_format = optarg;
1792 vapier 1.39 break;
1793     }
1794 solar 1.127 case 'z': {
1795 solar 1.129 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1796 solar 1.127 size_t x;
1797 vapier 1.27
1798 vapier 1.186 for (x = 0; x < strlen(optarg); x++) {
1799     switch (optarg[x]) {
1800 solar 1.127 case 'p':
1801     case 'P':
1802 vapier 1.165 do_pax_state(optarg[x], PAGEEXEC);
1803 solar 1.127 break;
1804     case 's':
1805     case 'S':
1806 vapier 1.165 do_pax_state(optarg[x], SEGMEXEC);
1807 solar 1.127 break;
1808     case 'm':
1809     case 'M':
1810 vapier 1.165 do_pax_state(optarg[x], MPROTECT);
1811 solar 1.127 break;
1812     case 'e':
1813     case 'E':
1814 vapier 1.165 do_pax_state(optarg[x], EMUTRAMP);
1815 solar 1.127 break;
1816     case 'r':
1817     case 'R':
1818 vapier 1.165 do_pax_state(optarg[x], RANDMMAP);
1819 solar 1.127 break;
1820     case 'x':
1821     case 'X':
1822 vapier 1.165 do_pax_state(optarg[x], RANDEXEC);
1823 solar 1.127 break;
1824     default:
1825     break;
1826     }
1827     }
1828     if (!(((flags & PF_PAGEEXEC) && (flags & PF_NOPAGEEXEC)) ||
1829     ((flags & PF_SEGMEXEC) && (flags & PF_NOSEGMEXEC)) ||
1830     ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)) ||
1831     ((flags & PF_RANDEXEC) && (flags & PF_NORANDEXEC)) ||
1832     ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1833     ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1834     setpax = flags;
1835     break;
1836     }
1837 solar 1.190 case 'Z': show_size = 1; break;
1838 solar 1.176 case 'g': g_match = 1; break;
1839 vapier 1.102 case 'L': use_ldcache = 1; break;
1840 vapier 1.37 case 'y': scan_symlink = 0; break;
1841 vapier 1.105 case 'A': scan_archives = 1; break;
1842 solar 1.16 case 'B': show_banner = 0; break;
1843 vapier 1.10 case 'l': scan_ldpath = 1; break;
1844     case 'p': scan_envpath = 1; break;
1845     case 'R': dir_recurse = 1; break;
1846 vapier 1.14 case 'm': dir_crossmount = 0; break;
1847 vapier 1.101 case 'X': ++fix_elf; break;
1848 vapier 1.10 case 'x': show_pax = 1; break;
1849 solar 1.73 case 'e': show_phdr = 1; break;
1850 vapier 1.10 case 't': show_textrel = 1; break;
1851     case 'r': show_rpath = 1; break;
1852 vapier 1.32 case 'n': show_needed = 1; break;
1853 vapier 1.38 case 'i': show_interp = 1; break;
1854 vapier 1.49 case 'b': show_bind = 1; break;
1855 vapier 1.84 case 'S': show_soname = 1; break;
1856 vapier 1.76 case 'T': show_textrels = 1; break;
1857 vapier 1.10 case 'q': be_quiet = 1; break;
1858 vapier 1.14 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1859 solar 1.183 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1860 solar 1.181 case 'D': show_endian = 1; break;
1861 solar 1.191 case 'I': show_osabi = 1; break;
1862     case 'Y': show_eabi = 1; break;
1863 vapier 1.10 case ':':
1864 vapier 1.113 err("Option '%c' is missing parameter", optopt);
1865 vapier 1.10 case '?':
1866 solar 1.119 err("Unknown option '%c' or argument missing", optopt);
1867 vapier 1.10 default:
1868 vapier 1.113 err("Unhandled option '%c'; please report this", i);
1869 vapier 1.10 }
1870     }
1871 solar 1.170 if (show_textrels && be_verbose) {
1872     if (which("objdump") != NULL)
1873     has_objdump = 1;
1874     }
1875 vapier 1.39 /* let the format option override all other options */
1876     if (out_format) {
1877 solar 1.73 show_pax = show_phdr = show_textrel = show_rpath = \
1878 vapier 1.84 show_needed = show_interp = show_bind = show_soname = \
1879 solar 1.191 show_textrels = show_perms = show_endian = show_size = \
1880     show_osabi = show_eabi = 0;
1881 vapier 1.48 for (i = 0; out_format[i]; ++i) {
1882 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
1883 vapier 1.39
1884 vapier 1.48 switch (out_format[++i]) {
1885 solar 1.132 case '+': break;
1886 vapier 1.39 case '%': break;
1887 vapier 1.70 case '#': break;
1888 vapier 1.39 case 'F': break;
1889 vapier 1.66 case 'p': break;
1890     case 'f': break;
1891 solar 1.124 case 'k': break;
1892 vapier 1.39 case 's': break;
1893 vapier 1.72 case 'N': break;
1894 vapier 1.41 case 'o': break;
1895 vapier 1.166 case 'a': break;
1896 vapier 1.171 case 'M': break;
1897 solar 1.190 case 'Z': show_size = 1; break;
1898 solar 1.181 case 'D': show_endian = 1; break;
1899 solar 1.191 case 'I': show_osabi = 1; break;
1900     case 'Y': show_eabi = 1; break;
1901 solar 1.180 case 'O': show_perms = 1; break;
1902 vapier 1.39 case 'x': show_pax = 1; break;
1903 solar 1.73 case 'e': show_phdr = 1; break;
1904 vapier 1.39 case 't': show_textrel = 1; break;
1905     case 'r': show_rpath = 1; break;
1906     case 'n': show_needed = 1; break;
1907     case 'i': show_interp = 1; break;
1908 vapier 1.49 case 'b': show_bind = 1; break;
1909 vapier 1.84 case 'S': show_soname = 1; break;
1910 vapier 1.76 case 'T': show_textrels = 1; break;
1911 vapier 1.39 default:
1912 vapier 1.162 err("Invalid format specifier '%c' (byte %i)",
1913 vapier 1.48 out_format[i], i+1);
1914 vapier 1.39 }
1915     }
1916 vapier 1.41
1917     /* construct our default format */
1918     } else {
1919     size_t fmt_len = 30;
1920 vapier 1.186 out_format = xmalloc(sizeof(char) * fmt_len);
1921 vapier 1.194 *out_format = '\0';
1922 vapier 1.76 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1923     if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1924 solar 1.180 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
1925 solar 1.190 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
1926 solar 1.181 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
1927 solar 1.191 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
1928     if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1929 vapier 1.76 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1930     if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1931     if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1932     if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1933     if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1934     if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1935 vapier 1.84 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1936 vapier 1.76 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
1937     if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1938 solar 1.124 if (find_section) xstrcat(&out_format, "%k ", &fmt_len);
1939 vapier 1.76 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
1940     if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1941 vapier 1.39 }
1942 vapier 1.41 if (be_verbose > 2) printf("Format: %s\n", out_format);
1943 vapier 1.39
1944     /* now lets actually do the scanning */
1945 vapier 1.102 if (scan_ldpath || use_ldcache)
1946 vapier 1.148 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1947 vapier 1.10 if (scan_ldpath) scanelf_ldpath();
1948     if (scan_envpath) scanelf_envpath();
1949 solar 1.153 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1950 vapier 1.133 from_file = "-";
1951 solar 1.45 if (from_file) {
1952     scanelf_from_file(from_file);
1953     from_file = *argv;
1954     }
1955     if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1956 vapier 1.25 err("Nothing to scan !?");
1957 vapier 1.66 while (optind < argc) {
1958     search_path = argv[optind++];
1959 solar 1.164 ret = scanelf_dir(search_path);
1960 vapier 1.66 }
1961 vapier 1.27
1962 vapier 1.39 /* clean up */
1963 vapier 1.48 for (i = 0; ldpaths[i]; ++i)
1964     free(ldpaths[i]);
1965 solar 1.96
1966     if (ldcache != 0)
1967     munmap(ldcache, ldcache_size);
1968 solar 1.164 return ret;
1969 vapier 1.10 }
1970    
1971 vapier 1.150 static char **get_split_env(const char *envvar)
1972     {
1973 vapier 1.152 const char *delims = " \t\n";
1974 solar 1.143 char **envvals = NULL;
1975 vapier 1.152 char *env, *s;
1976 kevquinn 1.142 int nentry;
1977    
1978 solar 1.143 if ((env = getenv(envvar)) == NULL)
1979     return NULL;
1980 kevquinn 1.142
1981 solar 1.143 env = xstrdup(env);
1982     if (env == NULL)
1983     return NULL;
1984 kevquinn 1.142
1985 vapier 1.152 s = strtok(env, delims);
1986     if (s == NULL) {
1987     free(env);
1988     return NULL;
1989     }
1990    
1991 solar 1.143 nentry = 0;
1992 vapier 1.152 while (s != NULL) {
1993     ++nentry;
1994     envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
1995     envvals[nentry-1] = s;
1996     s = strtok(NULL, delims);
1997 kevquinn 1.142 }
1998 vapier 1.152 envvals[nentry] = NULL;
1999 kevquinn 1.142
2000 vapier 1.152 /* don't want to free(env) as it contains the memory that backs
2001     * the envvals array of strings */
2002 kevquinn 1.142 return envvals;
2003     }
2004 solar 1.181
2005 vapier 1.184 static void parseenv(void)
2006 vapier 1.150 {
2007     qa_textrels = get_split_env("QA_TEXTRELS");
2008     qa_execstack = get_split_env("QA_EXECSTACK");
2009     qa_wx_load = get_split_env("QA_WX_LOAD");
2010 vapier 1.41 }
2011 solar 1.163
2012 vapier 1.152 #ifdef __PAX_UTILS_CLEANUP
2013 vapier 1.184 static void cleanup(void)
2014 vapier 1.152 {
2015     free(out_format);
2016     free(qa_textrels);
2017     free(qa_execstack);
2018     free(qa_wx_load);
2019     }
2020     #endif
2021 vapier 1.41
2022 vapier 1.10 int main(int argc, char *argv[])
2023 solar 1.1 {
2024 solar 1.164 int ret;
2025 vapier 1.10 if (argc < 2)
2026     usage(EXIT_FAILURE);
2027 kevquinn 1.142 parseenv();
2028 solar 1.164 ret = parseargs(argc, argv);
2029 solar 1.21 fclose(stdout);
2030 vapier 1.152 #ifdef __PAX_UTILS_CLEANUP
2031     cleanup();
2032     warn("The calls to add/delete heap should be off:\n"
2033     "\t- 1 due to the out_buffer not being freed in scanelf_file()\n"
2034     "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
2035 solar 1.61 #endif
2036 solar 1.164 return ret;
2037 solar 1.1 }
2038 vapier 1.155
2039     /* Match filename against entries in matchlist, return TRUE
2040     * if the file is listed */
2041     static int file_matches_list(const char *filename, char **matchlist)
2042     {
2043     char **file;
2044     char *match;
2045     char buf[__PAX_UTILS_PATH_MAX];
2046    
2047     if (matchlist == NULL)
2048     return 0;
2049    
2050     for (file = matchlist; *file != NULL; file++) {
2051     if (search_path) {
2052     snprintf(buf, sizeof(buf), "%s%s", search_path, *file);
2053     match = buf;
2054     } else {
2055     match = *file;
2056     }
2057     if (fnmatch(match, filename, 0) == 0)
2058     return 1;
2059     }
2060     return 0;
2061     }

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