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Revision 1.199 - (hide annotations) (download) (as text)
Wed Dec 10 20:05:20 2008 UTC (6 years ago) by grobian
Branch: MAIN
Changes since 1.198: +3 -6 lines
File MIME type: text/x-csrc
Fix manpage, thanks pipping

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 1.199 *next_sym++ = '\0'; /* 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     /* ok, lets compare the name now */ \
1055 flameeyes 1.198 if (scanelf_match_symname(this_sym, symname)) { \
1056 solar 1.132 if (be_semi_verbose) { \
1057     char buf[126]; \
1058     snprintf(buf, sizeof(buf), "%lX %s %s", \
1059     (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1060     ret = buf; \
1061     } else \
1062 flameeyes 1.197 ret = symname; \
1063 vapier 1.95 (*found_sym)++; \
1064     goto break_out; \
1065     } \
1066 flameeyes 1.197 } \
1067 vapier 1.95 } \
1068 vapier 1.27 } \
1069     ++sym; \
1070     } }
1071     FIND_SYM(32)
1072     FIND_SYM(64)
1073 vapier 1.39 }
1074 vapier 1.70
1075 vapier 1.95 break_out:
1076 solar 1.127 if (be_wewy_wewy_quiet) return NULL;
1077 vapier 1.70
1078 vapier 1.41 if (*find_sym != '*' && *found_sym)
1079 vapier 1.95 return ret;
1080 vapier 1.41 if (be_quiet)
1081     return NULL;
1082     else
1083 solar 1.68 return (char *)" - ";
1084 vapier 1.39 }
1085 solar 1.119
1086 solar 1.124 static char *scanelf_file_sections(elfobj *elf, char *found_section)
1087     {
1088     if (!find_section)
1089     return NULL;
1090    
1091     #define FIND_SECTION(B) \
1092     if (elf->elf_class == ELFCLASS ## B) { \
1093 solar 1.136 int invert; \
1094 solar 1.124 Elf ## B ## _Shdr *section; \
1095 solar 1.136 invert = (*find_section == '!' ? 1 : 0); \
1096     section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \
1097     if ((section == NULL && invert) || (section != NULL && !invert)) \
1098 solar 1.124 *found_section = 1; \
1099     }
1100     FIND_SECTION(32)
1101     FIND_SECTION(64)
1102    
1103 vapier 1.138 if (be_wewy_wewy_quiet)
1104     return NULL;
1105 solar 1.124
1106     if (*found_section)
1107     return find_section;
1108    
1109     if (be_quiet)
1110     return NULL;
1111     else
1112     return (char *)" - ";
1113     }
1114    
1115 vapier 1.39 /* scan an elf file and show all the fun stuff */
1116 solar 1.57 #define prints(str) write(fileno(stdout), str, strlen(str))
1117 vapier 1.106 static int scanelf_elfobj(elfobj *elf)
1118 vapier 1.39 {
1119 vapier 1.44 unsigned long i;
1120 vapier 1.162 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1121     found_rpath, found_needed, found_interp, found_bind, found_soname,
1122 solar 1.124 found_sym, found_lib, found_file, found_textrels, found_section;
1123 vapier 1.41 static char *out_buffer = NULL;
1124     static size_t out_len;
1125 vapier 1.39
1126 vapier 1.76 found_pax = found_phdr = found_relro = found_load = found_textrel = \
1127 vapier 1.84 found_rpath = found_needed = found_interp = found_bind = found_soname = \
1128 solar 1.124 found_sym = found_lib = found_file = found_textrels = found_section = 0;
1129 vapier 1.39
1130 vapier 1.114 if (be_verbose > 2)
1131 vapier 1.106 printf("%s: scanning file {%s,%s}\n", elf->filename,
1132 vapier 1.69 get_elfeitype(EI_CLASS, elf->elf_class),
1133     get_elfeitype(EI_DATA, elf->data[EI_DATA]));
1134 vapier 1.114 else if (be_verbose > 1)
1135 vapier 1.106 printf("%s: scanning file\n", elf->filename);
1136 vapier 1.39
1137 vapier 1.41 /* init output buffer */
1138     if (!out_buffer) {
1139     out_len = sizeof(char) * 80;
1140 vapier 1.186 out_buffer = xmalloc(out_len);
1141 vapier 1.41 }
1142     *out_buffer = '\0';
1143    
1144 vapier 1.39 /* show the header */
1145     if (!be_quiet && show_banner) {
1146 vapier 1.49 for (i = 0; out_format[i]; ++i) {
1147 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
1148 vapier 1.41
1149     switch (out_format[++i]) {
1150 solar 1.132 case '+': break;
1151 vapier 1.41 case '%': break;
1152 vapier 1.70 case '#': break;
1153 vapier 1.66 case 'F':
1154     case 'p':
1155     case 'f': prints("FILE "); found_file = 1; break;
1156 vapier 1.41 case 'o': prints(" TYPE "); break;
1157     case 'x': prints(" PAX "); break;
1158 vapier 1.71 case 'e': prints("STK/REL/PTL "); break;
1159 vapier 1.41 case 't': prints("TEXTREL "); break;
1160     case 'r': prints("RPATH "); break;
1161 vapier 1.171 case 'M': prints("CLASS "); break;
1162 vapier 1.41 case 'n': prints("NEEDED "); break;
1163     case 'i': prints("INTERP "); break;
1164 vapier 1.49 case 'b': prints("BIND "); break;
1165 solar 1.190 case 'Z': prints("SIZE "); break;
1166 vapier 1.84 case 'S': prints("SONAME "); break;
1167 vapier 1.41 case 's': prints("SYM "); break;
1168 vapier 1.72 case 'N': prints("LIB "); break;
1169 vapier 1.76 case 'T': prints("TEXTRELS "); break;
1170 vapier 1.126 case 'k': prints("SECTION "); break;
1171 vapier 1.166 case 'a': prints("ARCH "); break;
1172 solar 1.191 case 'I': prints("OSABI "); break;
1173     case 'Y': prints("EABI "); break;
1174 solar 1.180 case 'O': prints("PERM "); break;
1175 solar 1.181 case 'D': prints("ENDIAN "); break;
1176 vapier 1.76 default: warnf("'%c' has no title ?", out_format[i]);
1177 vapier 1.39 }
1178 vapier 1.27 }
1179 vapier 1.49 if (!found_file) prints("FILE ");
1180 vapier 1.41 prints("\n");
1181 vapier 1.49 found_file = 0;
1182 vapier 1.39 show_banner = 0;
1183     }
1184    
1185     /* dump all the good stuff */
1186 vapier 1.49 for (i = 0; out_format[i]; ++i) {
1187 vapier 1.41 const char *out;
1188 vapier 1.66 const char *tmp;
1189 solar 1.190 static char ubuf[sizeof(unsigned long)*2];
1190 vapier 1.70 if (!IS_MODIFIER(out_format[i])) {
1191 vapier 1.41 xchrcat(&out_buffer, out_format[i], &out_len);
1192     continue;
1193     }
1194 vapier 1.39
1195 vapier 1.41 out = NULL;
1196 solar 1.127 be_wewy_wewy_quiet = (out_format[i] == '#');
1197 solar 1.132 be_semi_verbose = (out_format[i] == '+');
1198 vapier 1.41 switch (out_format[++i]) {
1199 solar 1.132 case '+':
1200 vapier 1.70 case '%':
1201     case '#':
1202     xchrcat(&out_buffer, out_format[i], &out_len); break;
1203     case 'F':
1204 vapier 1.76 found_file = 1;
1205 solar 1.127 if (be_wewy_wewy_quiet) break;
1206 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
1207 vapier 1.70 break;
1208 vapier 1.66 case 'p':
1209 vapier 1.76 found_file = 1;
1210 solar 1.127 if (be_wewy_wewy_quiet) break;
1211 vapier 1.106 tmp = elf->filename;
1212 vapier 1.66 if (search_path) {
1213     ssize_t len_search = strlen(search_path);
1214 vapier 1.106 ssize_t len_file = strlen(elf->filename);
1215     if (!strncmp(elf->filename, search_path, len_search) && \
1216 vapier 1.66 len_file > len_search)
1217     tmp += len_search;
1218     if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
1219     }
1220     xstrcat(&out_buffer, tmp, &out_len);
1221     break;
1222     case 'f':
1223 vapier 1.76 found_file = 1;
1224 solar 1.127 if (be_wewy_wewy_quiet) break;
1225 vapier 1.106 tmp = strrchr(elf->filename, '/');
1226     tmp = (tmp == NULL ? elf->filename : tmp+1);
1227 vapier 1.66 xstrcat(&out_buffer, tmp, &out_len);
1228     break;
1229 vapier 1.41 case 'o': out = get_elfetype(elf); break;
1230     case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1231 solar 1.73 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
1232 vapier 1.41 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1233 vapier 1.79 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
1234 vapier 1.41 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1235 vapier 1.171 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1236 solar 1.181 case 'D': out = get_endian(elf); break;
1237 solar 1.180 case 'O': out = getstr_perms(elf->filename); break;
1238 vapier 1.72 case 'n':
1239     case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
1240 vapier 1.41 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1241 vapier 1.49 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1242 vapier 1.84 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1243 vapier 1.72 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1244 solar 1.124 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1245 vapier 1.166 case 'a': out = get_elfemtype(elf); break;
1246 solar 1.191 case 'I': out = get_elfosabi(elf); break;
1247     case 'Y': out = get_elf_eabi(elf); break;
1248 vapier 1.193 case 'Z': snprintf(ubuf, sizeof(ubuf), "%lu", (unsigned long)elf->len); out = ubuf; break;;
1249 vapier 1.76 default: warnf("'%c' has no scan code?", out_format[i]);
1250 vapier 1.29 }
1251 vapier 1.95 if (out) {
1252     /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1253     if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1254     xstrncat(&out_buffer, out, &out_len, (tmp-out));
1255     else
1256     xstrcat(&out_buffer, out, &out_len);
1257     }
1258 vapier 1.39 }
1259    
1260 vapier 1.54 #define FOUND_SOMETHING() \
1261 solar 1.73 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1262 vapier 1.76 found_rpath || found_needed || found_interp || found_bind || \
1263 solar 1.124 found_soname || found_sym || found_lib || found_textrels || found_section )
1264 vapier 1.54
1265     if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
1266     xchrcat(&out_buffer, ' ', &out_len);
1267 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
1268 vapier 1.27 }
1269 vapier 1.79 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
1270 vapier 1.41 puts(out_buffer);
1271 vapier 1.79 fflush(stdout);
1272     }
1273 vapier 1.10
1274 vapier 1.105 return 0;
1275     }
1276    
1277 vapier 1.106 /* scan a single elf */
1278     static int scanelf_elf(const char *filename, int fd, size_t len)
1279     {
1280 solar 1.120 int ret = 1;
1281 vapier 1.106 elfobj *elf;
1282    
1283     /* verify this is real ELF */
1284     if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1285     if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1286 solar 1.120 return ret;
1287     }
1288     switch (match_bits) {
1289     case 32:
1290     if (elf->elf_class != ELFCLASS32)
1291     goto label_done;
1292     break;
1293     case 64:
1294     if (elf->elf_class != ELFCLASS64)
1295     goto label_done;
1296     break;
1297     default: break;
1298 vapier 1.106 }
1299 solar 1.119 if (strlen(match_etypes)) {
1300     char sbuf[126];
1301     strncpy(sbuf, match_etypes, sizeof(sbuf));
1302     if (strchr(match_etypes, ',') != NULL) {
1303     char *p;
1304 vapier 1.186 while ((p = strrchr(sbuf, ',')) != NULL) {
1305 solar 1.119 *p = 0;
1306 solar 1.129 if (etype_lookup(p+1) == get_etype(elf))
1307 solar 1.119 goto label_ret;
1308     }
1309     }
1310 solar 1.129 if (etype_lookup(sbuf) != get_etype(elf))
1311 solar 1.119 goto label_done;
1312     }
1313    
1314     label_ret:
1315 vapier 1.106 ret = scanelf_elfobj(elf);
1316 solar 1.119
1317     label_done:
1318 vapier 1.106 unreadelf(elf);
1319     return ret;
1320     }
1321 solar 1.119
1322 vapier 1.105 /* scan an archive of elfs */
1323 vapier 1.106 static int scanelf_archive(const char *filename, int fd, size_t len)
1324 vapier 1.105 {
1325 vapier 1.106 archive_handle *ar;
1326 vapier 1.105 archive_member *m;
1327 vapier 1.106 char *ar_buffer;
1328     elfobj *elf;
1329    
1330     ar = ar_open_fd(filename, fd);
1331     if (ar == NULL)
1332     return 1;
1333    
1334     ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1335     while ((m=ar_next(ar)) != NULL) {
1336     elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1337     if (elf) {
1338     scanelf_elfobj(elf);
1339     unreadelf(elf);
1340     }
1341     }
1342     munmap(ar_buffer, len);
1343    
1344 vapier 1.105 return 0;
1345     }
1346     /* scan a file which may be an elf or an archive or some other magical beast */
1347 solar 1.164 static int scanelf_file(const char *filename, const struct stat *st_cache)
1348 vapier 1.105 {
1349 vapier 1.161 const struct stat *st = st_cache;
1350     struct stat symlink_st;
1351 vapier 1.106 int fd;
1352 vapier 1.105
1353     /* always handle regular files and handle symlinked files if no -y */
1354 vapier 1.161 if (S_ISLNK(st->st_mode)) {
1355 solar 1.164 if (!scan_symlink) return 1;
1356 vapier 1.161 stat(filename, &symlink_st);
1357     st = &symlink_st;
1358 vapier 1.105 }
1359 vapier 1.161
1360     if (!S_ISREG(st->st_mode)) {
1361 vapier 1.105 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1362 solar 1.164 return 1;
1363 vapier 1.105 }
1364    
1365 solar 1.180 if (match_perms) {
1366     if ((st->st_mode | match_perms) != st->st_mode)
1367     return 1;
1368     }
1369 vapier 1.106 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1370 solar 1.164 return 1;
1371 vapier 1.106
1372 vapier 1.161 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1373 vapier 1.105 /* if it isn't an ELF, maybe it's an .a archive */
1374 vapier 1.161 scanelf_archive(filename, fd, st->st_size);
1375 vapier 1.106
1376     close(fd);
1377 solar 1.164 return 0;
1378 solar 1.6 }
1379    
1380 solar 1.1 /* scan a directory for ET_EXEC files and print when we find one */
1381 solar 1.164 static int scanelf_dir(const char *path)
1382 solar 1.1 {
1383 vapier 1.10 register DIR *dir;
1384     register struct dirent *dentry;
1385 vapier 1.14 struct stat st_top, st;
1386 vapier 1.104 char buf[__PAX_UTILS_PATH_MAX];
1387 vapier 1.32 size_t pathlen = 0, len = 0;
1388 solar 1.164 int ret = 0;
1389 vapier 1.10
1390     /* make sure path exists */
1391 vapier 1.39 if (lstat(path, &st_top) == -1) {
1392     if (be_verbose > 2) printf("%s: does not exist\n", path);
1393 solar 1.164 return 1;
1394 vapier 1.39 }
1395 solar 1.11
1396 vapier 1.10 /* ok, if it isn't a directory, assume we can open it */
1397 vapier 1.14 if (!S_ISDIR(st_top.st_mode)) {
1398 solar 1.164 return scanelf_file(path, &st_top);
1399 vapier 1.10 }
1400    
1401     /* now scan the dir looking for fun stuff */
1402     if ((dir = opendir(path)) == NULL) {
1403     warnf("could not opendir %s: %s", path, strerror(errno));
1404 solar 1.164 return 1;
1405 vapier 1.10 }
1406 vapier 1.114 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1407 solar 1.11
1408 vapier 1.32 pathlen = strlen(path);
1409 vapier 1.10 while ((dentry = readdir(dir))) {
1410     if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
1411     continue;
1412 vapier 1.32 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
1413     if (len >= sizeof(buf)) {
1414 vapier 1.76 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1415     (unsigned long)len, (unsigned long)sizeof(buf));
1416 vapier 1.32 continue;
1417     }
1418 solar 1.143 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
1419 solar 1.20 if (lstat(buf, &st) != -1) {
1420 vapier 1.10 if (S_ISREG(st.st_mode))
1421 solar 1.164 ret = scanelf_file(buf, &st);
1422 vapier 1.10 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1423 vapier 1.14 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1424 solar 1.164 ret = scanelf_dir(buf);
1425 vapier 1.10 }
1426     }
1427     }
1428     closedir(dir);
1429 solar 1.164 return ret;
1430 solar 1.1 }
1431    
1432 vapier 1.133 static int scanelf_from_file(const char *filename)
1433 vapier 1.47 {
1434 solar 1.45 FILE *fp = NULL;
1435     char *p;
1436 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1437 solar 1.164 int ret = 0;
1438 solar 1.45
1439 solar 1.132 if (strcmp(filename, "-") == 0)
1440 solar 1.45 fp = stdin;
1441     else if ((fp = fopen(filename, "r")) == NULL)
1442     return 1;
1443    
1444 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1445 solar 1.45 if ((p = strchr(path, '\n')) != NULL)
1446     *p = 0;
1447 vapier 1.66 search_path = path;
1448 solar 1.164 ret = scanelf_dir(path);
1449 solar 1.45 }
1450     if (fp != stdin)
1451     fclose(fp);
1452 solar 1.164 return ret;
1453 solar 1.45 }
1454    
1455 solar 1.154 #if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1456 vapier 1.148
1457     static int load_ld_cache_config(int i, const char *fname)
1458 vapier 1.48 {
1459     FILE *fp = NULL;
1460     char *p;
1461 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1462 vapier 1.48
1463 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1464 solar 1.123 return i;
1465    
1466     if ((fp = fopen(fname, "r")) == NULL)
1467     return i;
1468 vapier 1.48
1469 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1470 vapier 1.48 if ((p = strrchr(path, '\r')) != NULL)
1471     *p = 0;
1472     if ((p = strchr(path, '\n')) != NULL)
1473     *p = 0;
1474 solar 1.154 #ifdef __linux__
1475 vapier 1.186 /* recursive includes of the same file will make this segfault. */
1476 solar 1.129 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1477 solar 1.123 glob64_t gl;
1478     size_t x;
1479     char gpath[__PAX_UTILS_PATH_MAX];
1480    
1481 solar 1.129 memset(gpath, 0, sizeof(gpath));
1482 solar 1.123
1483     if (path[8] != '/')
1484 solar 1.129 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]);
1485 solar 1.123 else
1486 solar 1.129 strncpy(gpath, &path[8], sizeof(gpath));
1487 solar 1.123
1488     if ((glob64(gpath, 0, NULL, &gl)) == 0) {
1489     for (x = 0; x < gl.gl_pathc; ++x) {
1490     /* try to avoid direct loops */
1491     if (strcmp(gl.gl_pathv[x], fname) == 0)
1492     continue;
1493 vapier 1.148 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1494 vapier 1.149 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1495 solar 1.123 globfree64(&gl);
1496     return i;
1497     }
1498     }
1499     globfree64 (&gl);
1500     continue;
1501 solar 1.160 }
1502 solar 1.123 }
1503 solar 1.154 #endif
1504 solar 1.123 if (*path != '/')
1505     continue;
1506 vapier 1.48
1507     ldpaths[i++] = xstrdup(path);
1508    
1509 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1510 vapier 1.48 break;
1511     }
1512     ldpaths[i] = NULL;
1513    
1514     fclose(fp);
1515 solar 1.123 return i;
1516 vapier 1.48 }
1517 flameeyes 1.141
1518 vapier 1.148 #elif defined(__FreeBSD__) || (__DragonFly__)
1519    
1520     static int load_ld_cache_config(int i, const char *fname)
1521 flameeyes 1.141 {
1522     FILE *fp = NULL;
1523     char *b = NULL, *p;
1524     struct elfhints_hdr hdr;
1525 vapier 1.152
1526 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1527 flameeyes 1.141 return i;
1528    
1529     if ((fp = fopen(fname, "r")) == NULL)
1530     return i;
1531    
1532 vapier 1.152 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1533     hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1534     fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1535     {
1536 flameeyes 1.141 fclose(fp);
1537     return i;
1538     }
1539 vapier 1.152
1540 vapier 1.186 b = xmalloc(hdr.dirlistlen + 1);
1541 vapier 1.152 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1542 flameeyes 1.141 fclose(fp);
1543     free(b);
1544     return i;
1545     }
1546 vapier 1.152
1547     while ((p = strsep(&b, ":"))) {
1548     if (*p == '\0') continue;
1549 flameeyes 1.141 ldpaths[i++] = xstrdup(p);
1550 vapier 1.152
1551 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1552 flameeyes 1.141 break;
1553     }
1554     ldpaths[i] = NULL;
1555 vapier 1.157
1556 flameeyes 1.141 free(b);
1557     fclose(fp);
1558     return i;
1559     }
1560 vapier 1.148
1561     #else
1562 vapier 1.192 #ifdef __ELF__
1563 vapier 1.148 #warning Cache config support not implemented for your target
1564 vapier 1.192 #endif
1565 vapier 1.148 static int load_ld_cache_config(int i, const char *fname)
1566     {
1567     memset(ldpaths, 0x00, sizeof(ldpaths));
1568 vapier 1.192 return 0;
1569 vapier 1.148 }
1570 flameeyes 1.141 #endif
1571 vapier 1.48
1572 vapier 1.10 /* scan /etc/ld.so.conf for paths */
1573 vapier 1.184 static void scanelf_ldpath(void)
1574 vapier 1.10 {
1575 vapier 1.17 char scan_l, scan_ul, scan_ull;
1576 vapier 1.48 int i = 0;
1577 vapier 1.10
1578 vapier 1.48 if (!ldpaths[0])
1579     err("Unable to load any paths from ld.so.conf");
1580 vapier 1.10
1581 vapier 1.17 scan_l = scan_ul = scan_ull = 0;
1582    
1583 vapier 1.48 while (ldpaths[i]) {
1584     if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
1585     if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
1586     if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
1587     scanelf_dir(ldpaths[i]);
1588     ++i;
1589     }
1590 vapier 1.10
1591 vapier 1.17 if (!scan_l) scanelf_dir("/lib");
1592     if (!scan_ul) scanelf_dir("/usr/lib");
1593     if (!scan_ull) scanelf_dir("/usr/local/lib");
1594 vapier 1.10 }
1595 solar 1.1
1596 vapier 1.10 /* scan env PATH for paths */
1597 vapier 1.184 static void scanelf_envpath(void)
1598 solar 1.1 {
1599 solar 1.34 char *path, *p;
1600 vapier 1.10
1601     path = getenv("PATH");
1602     if (!path)
1603     err("PATH is not set in your env !");
1604 vapier 1.41 path = xstrdup(path);
1605 vapier 1.10
1606     while ((p = strrchr(path, ':')) != NULL) {
1607     scanelf_dir(p + 1);
1608     *p = 0;
1609     }
1610 vapier 1.17
1611 solar 1.34 free(path);
1612 solar 1.1 }
1613    
1614 solar 1.191 /* usage / invocation handling functions */ /* Free Flags: c d j u w C G H J K P Q U W */
1615     #define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZBhV"
1616 vapier 1.27 #define a_argument required_argument
1617 vapier 1.10 static struct option const long_opts[] = {
1618     {"path", no_argument, NULL, 'p'},
1619     {"ldpath", no_argument, NULL, 'l'},
1620     {"recursive", no_argument, NULL, 'R'},
1621 vapier 1.14 {"mount", no_argument, NULL, 'm'},
1622 vapier 1.37 {"symlink", no_argument, NULL, 'y'},
1623 vapier 1.105 {"archives", no_argument, NULL, 'A'},
1624     {"ldcache", no_argument, NULL, 'L'},
1625 vapier 1.101 {"fix", no_argument, NULL, 'X'},
1626 solar 1.127 {"setpax", a_argument, NULL, 'z'},
1627 vapier 1.10 {"pax", no_argument, NULL, 'x'},
1628 solar 1.16 {"header", no_argument, NULL, 'e'},
1629 vapier 1.10 {"textrel", no_argument, NULL, 't'},
1630     {"rpath", no_argument, NULL, 'r'},
1631 vapier 1.32 {"needed", no_argument, NULL, 'n'},
1632 vapier 1.38 {"interp", no_argument, NULL, 'i'},
1633 vapier 1.49 {"bind", no_argument, NULL, 'b'},
1634 vapier 1.84 {"soname", no_argument, NULL, 'S'},
1635 vapier 1.76 {"symbol", a_argument, NULL, 's'},
1636 solar 1.124 {"section", a_argument, NULL, 'k'},
1637 vapier 1.76 {"lib", a_argument, NULL, 'N'},
1638 solar 1.86 {"gmatch", no_argument, NULL, 'g'},
1639 vapier 1.76 {"textrels", no_argument, NULL, 'T'},
1640 solar 1.119 {"etype", a_argument, NULL, 'E'},
1641 solar 1.120 {"bits", a_argument, NULL, 'M'},
1642 solar 1.181 {"endian", no_argument, NULL, 'D'},
1643 solar 1.191 {"osabi", no_argument, NULL, 'I'},
1644     {"eabi", no_argument, NULL, 'Y'},
1645 solar 1.180 {"perms", a_argument, NULL, 'O'},
1646 solar 1.190 {"size", no_argument, NULL, 'Z'},
1647 vapier 1.10 {"all", no_argument, NULL, 'a'},
1648     {"quiet", no_argument, NULL, 'q'},
1649 vapier 1.14 {"verbose", no_argument, NULL, 'v'},
1650 vapier 1.76 {"format", a_argument, NULL, 'F'},
1651     {"from", a_argument, NULL, 'f'},
1652     {"file", a_argument, NULL, 'o'},
1653 solar 1.16 {"nobanner", no_argument, NULL, 'B'},
1654 vapier 1.10 {"help", no_argument, NULL, 'h'},
1655     {"version", no_argument, NULL, 'V'},
1656     {NULL, no_argument, NULL, 0x0}
1657     };
1658 solar 1.57
1659 solar 1.68 static const char *opts_help[] = {
1660 vapier 1.10 "Scan all directories in PATH environment",
1661     "Scan all directories in /etc/ld.so.conf",
1662 vapier 1.14 "Scan directories recursively",
1663 vapier 1.37 "Don't recursively cross mount points",
1664 vapier 1.101 "Don't scan symlinks",
1665 vapier 1.105 "Scan archives (.a files)",
1666     "Utilize ld.so.cache information (use with -r/-n)",
1667 solar 1.127 "Try and 'fix' bad things (use with -r/-e)",
1668     "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
1669 vapier 1.10 "Print PaX markings",
1670 vapier 1.71 "Print GNU_STACK/PT_LOAD markings",
1671 vapier 1.10 "Print TEXTREL information",
1672     "Print RPATH information",
1673 vapier 1.32 "Print NEEDED information",
1674 vapier 1.38 "Print INTERP information",
1675 vapier 1.49 "Print BIND information",
1676 vapier 1.84 "Print SONAME information",
1677 vapier 1.27 "Find a specified symbol",
1678 solar 1.124 "Find a specified section",
1679 vapier 1.72 "Find a specified library",
1680 solar 1.86 "Use strncmp to match libraries. (use with -N)",
1681 vapier 1.76 "Locate cause of TEXTREL",
1682 solar 1.129 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1683 solar 1.120 "Print only ELF files matching numeric bits",
1684 solar 1.181 "Print Endianness",
1685 solar 1.191 "Print OSABI",
1686     "Print EABI (EM_ARM Only)",
1687 solar 1.180 "Print only ELF files matching octal permissions",
1688 solar 1.190 "Print ELF file size",
1689 vapier 1.82 "Print all scanned info (-x -e -t -r -b)\n",
1690 vapier 1.14 "Only output 'bad' things",
1691     "Be verbose (can be specified more than once)",
1692 vapier 1.39 "Use specified format for output",
1693 solar 1.45 "Read input stream from a filename",
1694 vapier 1.24 "Write output stream to a filename",
1695 vapier 1.14 "Don't display the header",
1696 vapier 1.10 "Print this help and exit",
1697     "Print version and exit",
1698     NULL
1699     };
1700    
1701     /* display usage and exit */
1702     static void usage(int status)
1703 solar 1.1 {
1704 vapier 1.44 unsigned long i;
1705 solar 1.52 printf("* Scan ELF binaries for stuff\n\n"
1706 vapier 1.105 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1707 solar 1.35 printf("Options: -[%s]\n", PARSE_FLAGS);
1708 vapier 1.10 for (i = 0; long_opts[i].name; ++i)
1709 vapier 1.27 if (long_opts[i].has_arg == no_argument)
1710 vapier 1.157 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1711 vapier 1.27 long_opts[i].name, opts_help[i]);
1712     else
1713 solar 1.124 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1714 vapier 1.27 long_opts[i].name, opts_help[i]);
1715 solar 1.45
1716 vapier 1.173 puts("\nFor more information, see the scanelf(1) manpage");
1717 vapier 1.10 exit(status);
1718 solar 1.1 }
1719    
1720     /* parse command line arguments and preform needed actions */
1721 vapier 1.165 #define do_pax_state(option, flag) \
1722     if (islower(option)) { \
1723     flags &= ~PF_##flag; \
1724     flags |= PF_NO##flag; \
1725     } else { \
1726     flags &= ~PF_NO##flag; \
1727     flags |= PF_##flag; \
1728     }
1729 solar 1.164 static int parseargs(int argc, char *argv[])
1730 vapier 1.10 {
1731 vapier 1.48 int i;
1732 vapier 1.133 const char *from_file = NULL;
1733 solar 1.164 int ret = 0;
1734 vapier 1.10
1735     opterr = 0;
1736 vapier 1.48 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1737     switch (i) {
1738 vapier 1.10
1739 vapier 1.39 case 'V':
1740 vapier 1.80 printf("pax-utils-%s: %s compiled %s\n%s\n"
1741     "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
1742     VERSION, __FILE__, __DATE__, rcsid, argv0);
1743 vapier 1.10 exit(EXIT_SUCCESS);
1744     break;
1745     case 'h': usage(EXIT_SUCCESS); break;
1746 solar 1.45 case 'f':
1747 vapier 1.100 if (from_file) warn("You prob don't want to specify -f twice");
1748     from_file = optarg;
1749 solar 1.45 break;
1750 solar 1.119 case 'E':
1751     strncpy(match_etypes, optarg, sizeof(match_etypes));
1752     break;
1753 solar 1.120 case 'M':
1754     match_bits = atoi(optarg);
1755 solar 1.182 if (match_bits == 0) {
1756     if (strcmp(optarg, "ELFCLASS32") == 0)
1757     match_bits = 32;
1758     if (strcmp(optarg, "ELFCLASS64") == 0)
1759     match_bits = 64;
1760     }
1761 solar 1.120 break;
1762 solar 1.180 case 'O':
1763     if (sscanf(optarg, "%o", &match_perms) == (-1))
1764     match_bits = 0;
1765     break;
1766 vapier 1.24 case 'o': {
1767 vapier 1.146 if (freopen(optarg, "w", stdout) == NULL)
1768 vapier 1.24 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1769 solar 1.21 break;
1770     }
1771 solar 1.124 case 'k':
1772 vapier 1.126 if (find_section) warn("You prob don't want to specify -k twice");
1773 solar 1.124 find_section = optarg;
1774     break;
1775 vapier 1.39 case 's': {
1776 vapier 1.93 if (find_sym) warn("You prob don't want to specify -s twice");
1777     find_sym = optarg;
1778 vapier 1.39 break;
1779     }
1780 vapier 1.72 case 'N': {
1781 vapier 1.93 if (find_lib) warn("You prob don't want to specify -N twice");
1782     find_lib = optarg;
1783 vapier 1.72 break;
1784     }
1785 vapier 1.39
1786     case 'F': {
1787 vapier 1.93 if (out_format) warn("You prob don't want to specify -F twice");
1788     out_format = optarg;
1789 vapier 1.39 break;
1790     }
1791 solar 1.127 case 'z': {
1792 solar 1.129 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1793 solar 1.127 size_t x;
1794 vapier 1.27
1795 vapier 1.186 for (x = 0; x < strlen(optarg); x++) {
1796     switch (optarg[x]) {
1797 solar 1.127 case 'p':
1798     case 'P':
1799 vapier 1.165 do_pax_state(optarg[x], PAGEEXEC);
1800 solar 1.127 break;
1801     case 's':
1802     case 'S':
1803 vapier 1.165 do_pax_state(optarg[x], SEGMEXEC);
1804 solar 1.127 break;
1805     case 'm':
1806     case 'M':
1807 vapier 1.165 do_pax_state(optarg[x], MPROTECT);
1808 solar 1.127 break;
1809     case 'e':
1810     case 'E':
1811 vapier 1.165 do_pax_state(optarg[x], EMUTRAMP);
1812 solar 1.127 break;
1813     case 'r':
1814     case 'R':
1815 vapier 1.165 do_pax_state(optarg[x], RANDMMAP);
1816 solar 1.127 break;
1817     case 'x':
1818     case 'X':
1819 vapier 1.165 do_pax_state(optarg[x], RANDEXEC);
1820 solar 1.127 break;
1821     default:
1822     break;
1823     }
1824     }
1825     if (!(((flags & PF_PAGEEXEC) && (flags & PF_NOPAGEEXEC)) ||
1826     ((flags & PF_SEGMEXEC) && (flags & PF_NOSEGMEXEC)) ||
1827     ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)) ||
1828     ((flags & PF_RANDEXEC) && (flags & PF_NORANDEXEC)) ||
1829     ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1830     ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1831     setpax = flags;
1832     break;
1833     }
1834 solar 1.190 case 'Z': show_size = 1; break;
1835 solar 1.176 case 'g': g_match = 1; break;
1836 vapier 1.102 case 'L': use_ldcache = 1; break;
1837 vapier 1.37 case 'y': scan_symlink = 0; break;
1838 vapier 1.105 case 'A': scan_archives = 1; break;
1839 solar 1.16 case 'B': show_banner = 0; break;
1840 vapier 1.10 case 'l': scan_ldpath = 1; break;
1841     case 'p': scan_envpath = 1; break;
1842     case 'R': dir_recurse = 1; break;
1843 vapier 1.14 case 'm': dir_crossmount = 0; break;
1844 vapier 1.101 case 'X': ++fix_elf; break;
1845 vapier 1.10 case 'x': show_pax = 1; break;
1846 solar 1.73 case 'e': show_phdr = 1; break;
1847 vapier 1.10 case 't': show_textrel = 1; break;
1848     case 'r': show_rpath = 1; break;
1849 vapier 1.32 case 'n': show_needed = 1; break;
1850 vapier 1.38 case 'i': show_interp = 1; break;
1851 vapier 1.49 case 'b': show_bind = 1; break;
1852 vapier 1.84 case 'S': show_soname = 1; break;
1853 vapier 1.76 case 'T': show_textrels = 1; break;
1854 vapier 1.10 case 'q': be_quiet = 1; break;
1855 vapier 1.14 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1856 solar 1.183 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1857 solar 1.181 case 'D': show_endian = 1; break;
1858 solar 1.191 case 'I': show_osabi = 1; break;
1859     case 'Y': show_eabi = 1; break;
1860 vapier 1.10 case ':':
1861 vapier 1.113 err("Option '%c' is missing parameter", optopt);
1862 vapier 1.10 case '?':
1863 solar 1.119 err("Unknown option '%c' or argument missing", optopt);
1864 vapier 1.10 default:
1865 vapier 1.113 err("Unhandled option '%c'; please report this", i);
1866 vapier 1.10 }
1867     }
1868 solar 1.170 if (show_textrels && be_verbose) {
1869     if (which("objdump") != NULL)
1870     has_objdump = 1;
1871     }
1872 vapier 1.39 /* let the format option override all other options */
1873     if (out_format) {
1874 solar 1.73 show_pax = show_phdr = show_textrel = show_rpath = \
1875 vapier 1.84 show_needed = show_interp = show_bind = show_soname = \
1876 solar 1.191 show_textrels = show_perms = show_endian = show_size = \
1877     show_osabi = show_eabi = 0;
1878 vapier 1.48 for (i = 0; out_format[i]; ++i) {
1879 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
1880 vapier 1.39
1881 vapier 1.48 switch (out_format[++i]) {
1882 solar 1.132 case '+': break;
1883 vapier 1.39 case '%': break;
1884 vapier 1.70 case '#': break;
1885 vapier 1.39 case 'F': break;
1886 vapier 1.66 case 'p': break;
1887     case 'f': break;
1888 solar 1.124 case 'k': break;
1889 vapier 1.39 case 's': break;
1890 vapier 1.72 case 'N': break;
1891 vapier 1.41 case 'o': break;
1892 vapier 1.166 case 'a': break;
1893 vapier 1.171 case 'M': break;
1894 solar 1.190 case 'Z': show_size = 1; break;
1895 solar 1.181 case 'D': show_endian = 1; break;
1896 solar 1.191 case 'I': show_osabi = 1; break;
1897     case 'Y': show_eabi = 1; break;
1898 solar 1.180 case 'O': show_perms = 1; break;
1899 vapier 1.39 case 'x': show_pax = 1; break;
1900 solar 1.73 case 'e': show_phdr = 1; break;
1901 vapier 1.39 case 't': show_textrel = 1; break;
1902     case 'r': show_rpath = 1; break;
1903     case 'n': show_needed = 1; break;
1904     case 'i': show_interp = 1; break;
1905 vapier 1.49 case 'b': show_bind = 1; break;
1906 vapier 1.84 case 'S': show_soname = 1; break;
1907 vapier 1.76 case 'T': show_textrels = 1; break;
1908 vapier 1.39 default:
1909 vapier 1.162 err("Invalid format specifier '%c' (byte %i)",
1910 vapier 1.48 out_format[i], i+1);
1911 vapier 1.39 }
1912     }
1913 vapier 1.41
1914     /* construct our default format */
1915     } else {
1916     size_t fmt_len = 30;
1917 vapier 1.186 out_format = xmalloc(sizeof(char) * fmt_len);
1918 vapier 1.194 *out_format = '\0';
1919 vapier 1.76 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1920     if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1921 solar 1.180 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
1922 solar 1.190 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
1923 solar 1.181 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
1924 solar 1.191 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
1925     if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1926 vapier 1.76 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1927     if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1928     if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1929     if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1930     if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1931     if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1932 vapier 1.84 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1933 vapier 1.76 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
1934     if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1935 solar 1.124 if (find_section) xstrcat(&out_format, "%k ", &fmt_len);
1936 vapier 1.76 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
1937     if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1938 vapier 1.39 }
1939 vapier 1.41 if (be_verbose > 2) printf("Format: %s\n", out_format);
1940 vapier 1.39
1941     /* now lets actually do the scanning */
1942 vapier 1.102 if (scan_ldpath || use_ldcache)
1943 vapier 1.148 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1944 vapier 1.10 if (scan_ldpath) scanelf_ldpath();
1945     if (scan_envpath) scanelf_envpath();
1946 solar 1.153 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1947 vapier 1.133 from_file = "-";
1948 solar 1.45 if (from_file) {
1949     scanelf_from_file(from_file);
1950     from_file = *argv;
1951     }
1952     if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1953 vapier 1.25 err("Nothing to scan !?");
1954 vapier 1.66 while (optind < argc) {
1955     search_path = argv[optind++];
1956 solar 1.164 ret = scanelf_dir(search_path);
1957 vapier 1.66 }
1958 vapier 1.27
1959 vapier 1.39 /* clean up */
1960 vapier 1.48 for (i = 0; ldpaths[i]; ++i)
1961     free(ldpaths[i]);
1962 solar 1.96
1963     if (ldcache != 0)
1964     munmap(ldcache, ldcache_size);
1965 solar 1.164 return ret;
1966 vapier 1.10 }
1967    
1968 vapier 1.150 static char **get_split_env(const char *envvar)
1969     {
1970 vapier 1.152 const char *delims = " \t\n";
1971 solar 1.143 char **envvals = NULL;
1972 vapier 1.152 char *env, *s;
1973 kevquinn 1.142 int nentry;
1974    
1975 solar 1.143 if ((env = getenv(envvar)) == NULL)
1976     return NULL;
1977 kevquinn 1.142
1978 solar 1.143 env = xstrdup(env);
1979     if (env == NULL)
1980     return NULL;
1981 kevquinn 1.142
1982 vapier 1.152 s = strtok(env, delims);
1983     if (s == NULL) {
1984     free(env);
1985     return NULL;
1986     }
1987    
1988 solar 1.143 nentry = 0;
1989 vapier 1.152 while (s != NULL) {
1990     ++nentry;
1991     envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
1992     envvals[nentry-1] = s;
1993     s = strtok(NULL, delims);
1994 kevquinn 1.142 }
1995 vapier 1.152 envvals[nentry] = NULL;
1996 kevquinn 1.142
1997 vapier 1.152 /* don't want to free(env) as it contains the memory that backs
1998     * the envvals array of strings */
1999 kevquinn 1.142 return envvals;
2000     }
2001 solar 1.181
2002 vapier 1.184 static void parseenv(void)
2003 vapier 1.150 {
2004     qa_textrels = get_split_env("QA_TEXTRELS");
2005     qa_execstack = get_split_env("QA_EXECSTACK");
2006     qa_wx_load = get_split_env("QA_WX_LOAD");
2007 vapier 1.41 }
2008 solar 1.163
2009 vapier 1.152 #ifdef __PAX_UTILS_CLEANUP
2010 vapier 1.184 static void cleanup(void)
2011 vapier 1.152 {
2012     free(out_format);
2013     free(qa_textrels);
2014     free(qa_execstack);
2015     free(qa_wx_load);
2016     }
2017     #endif
2018 vapier 1.41
2019 vapier 1.10 int main(int argc, char *argv[])
2020 solar 1.1 {
2021 solar 1.164 int ret;
2022 vapier 1.10 if (argc < 2)
2023     usage(EXIT_FAILURE);
2024 kevquinn 1.142 parseenv();
2025 solar 1.164 ret = parseargs(argc, argv);
2026 solar 1.21 fclose(stdout);
2027 vapier 1.152 #ifdef __PAX_UTILS_CLEANUP
2028     cleanup();
2029     warn("The calls to add/delete heap should be off:\n"
2030     "\t- 1 due to the out_buffer not being freed in scanelf_file()\n"
2031     "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
2032 solar 1.61 #endif
2033 solar 1.164 return ret;
2034 solar 1.1 }
2035 vapier 1.155
2036     /* Match filename against entries in matchlist, return TRUE
2037     * if the file is listed */
2038     static int file_matches_list(const char *filename, char **matchlist)
2039     {
2040     char **file;
2041     char *match;
2042     char buf[__PAX_UTILS_PATH_MAX];
2043    
2044     if (matchlist == NULL)
2045     return 0;
2046    
2047     for (file = matchlist; *file != NULL; file++) {
2048     if (search_path) {
2049     snprintf(buf, sizeof(buf), "%s%s", search_path, *file);
2050     match = buf;
2051     } else {
2052     match = *file;
2053     }
2054     if (fnmatch(match, filename, 0) == 0)
2055     return 1;
2056     }
2057     return 0;
2058     }

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