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Revision 1.205 - (hide annotations) (download) (as text)
Tue Dec 30 13:13:15 2008 UTC (5 years, 8 months ago) by vapier
Branch: MAIN
Changes since 1.204: +4 -4 lines
File MIME type: text/x-csrc
drop excessive parenthesis

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 vapier 1.205 * $Header: /var/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.204 2008/12/30 13:09:20 vapier 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 vapier 1.205 static const char *rcsid = "$Id: scanelf.c,v 1.204 2008/12/30 13:09:20 vapier 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 vapier 1.203 static int match_bits = 0;
74     static unsigned int match_perms = 0;
75     static caddr_t ldcache = 0;
76     static size_t ldcache_size = 0;
77     static unsigned long setpax = 0UL;
78 solar 1.96
79 vapier 1.203 static int has_objdump = 0;
80 solar 1.175
81 vapier 1.204 static const char *getstr_perms(const char *fname)
82 vapier 1.186 {
83 solar 1.180 struct stat st;
84     static char buf[8];
85    
86 vapier 1.204 if (stat(fname, &st) == -1)
87     return "";
88 solar 1.180
89     snprintf(buf, sizeof(buf), "%o", st.st_mode);
90    
91 vapier 1.204 return buf + 2;
92 solar 1.180 }
93    
94 solar 1.174 /* find the path to a file by name */
95 solar 1.170 static char *which(const char *fname)
96     {
97     static char fullpath[BUFSIZ];
98 vapier 1.172 char *path, *p;
99 solar 1.170
100 vapier 1.172 path = getenv("PATH");
101     if (!path)
102 solar 1.170 return NULL;
103    
104 vapier 1.172 path = xstrdup(path);
105     while ((p = strrchr(path, ':')) != NULL) {
106 solar 1.170 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
107 vapier 1.172 *p = 0;
108 vapier 1.205 if (access(fullpath, R_OK) != -1) {
109 solar 1.170 free(path);
110 vapier 1.204 return fullpath;
111 solar 1.170 }
112 vapier 1.172 }
113     free(path);
114 solar 1.170 return NULL;
115     }
116 vapier 1.152
117 solar 1.175 /* 1 on failure. 0 otherwise */
118 solar 1.174 static int rematch(const char *regex, const char *match, int cflags)
119     {
120     regex_t preg;
121     int ret;
122    
123     if ((match == NULL) || (regex == NULL))
124     return EXIT_FAILURE;
125    
126     if ((ret = regcomp(&preg, regex, cflags))) {
127     char err[256];
128    
129     if (regerror(ret, &preg, err, sizeof(err)))
130     fprintf(stderr, "regcomp failed: %s", err);
131     else
132     fprintf(stderr, "regcomp failed");
133    
134     return EXIT_FAILURE;
135     }
136     ret = regexec(&preg, match, 0, NULL, 0);
137     regfree(&preg);
138    
139     return ret;
140     }
141    
142 vapier 1.39 /* sub-funcs for scanelf_file() */
143 vapier 1.77 static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
144     {
145     /* find the best SHT_DYNSYM and SHT_STRTAB sections */
146     #define GET_SYMTABS(B) \
147     if (elf->elf_class == ELFCLASS ## B) { \
148     Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
149     /* debug sections */ \
150     symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
151     strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
152     /* runtime sections */ \
153     dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
154     dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
155     if (symtab && dynsym) { \
156     *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \
157     } else { \
158     *sym = (void*)(symtab ? symtab : dynsym); \
159     } \
160     if (strtab && dynstr) { \
161     *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \
162     } else { \
163     *tab = (void*)(strtab ? strtab : dynstr); \
164     } \
165     }
166     GET_SYMTABS(32)
167     GET_SYMTABS(64)
168     }
169 solar 1.127
170 vapier 1.41 static char *scanelf_file_pax(elfobj *elf, char *found_pax)
171 solar 1.6 {
172 solar 1.61 static char ret[7];
173     unsigned long i, shown;
174    
175 vapier 1.41 if (!show_pax) return NULL;
176 vapier 1.10
177 solar 1.61 shown = 0;
178     memset(&ret, 0, sizeof(ret));
179    
180     if (elf->phdr) {
181     #define SHOW_PAX(B) \
182     if (elf->elf_class == ELFCLASS ## B) { \
183     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
184     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
185     for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
186     if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \
187     continue; \
188 solar 1.127 if (fix_elf && setpax) { \
189     /* set the paxctl flags */ \
190     ESET(phdr[i].p_flags, setpax); \
191     } \
192 solar 1.129 if (be_quiet && (EGET(phdr[i].p_flags) == (PF_NOEMUTRAMP | PF_NORANDEXEC))) \
193 solar 1.61 continue; \
194     memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \
195     *found_pax = 1; \
196     ++shown; \
197     break; \
198     } \
199     }
200     SHOW_PAX(32)
201     SHOW_PAX(64)
202     }
203    
204 solar 1.128 if (fix_elf && setpax) {
205     /* set the chpax settings */
206 solar 1.129 if (elf->elf_class == ELFCLASS32) {
207     if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC)
208     ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
209     } else {
210     if (EHDR64(elf->ehdr)->e_type == ET_DYN || EHDR64(elf->ehdr)->e_type == ET_EXEC)
211     ESET(EHDR64(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
212     }
213 solar 1.128 }
214    
215 solar 1.61 /* fall back to EI_PAX if no PT_PAX was found */
216     if (!*ret) {
217 vapier 1.90 static char *paxflags;
218 solar 1.61 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
219     if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
220     *found_pax = 1;
221 solar 1.127 return (be_wewy_wewy_quiet ? NULL : paxflags);
222 solar 1.61 }
223     strncpy(ret, paxflags, sizeof(ret));
224 vapier 1.14 }
225 vapier 1.41
226 solar 1.127 if (be_wewy_wewy_quiet || (be_quiet && !shown))
227 solar 1.61 return NULL;
228 vapier 1.90 else
229     return ret;
230     }
231 solar 1.61
232 solar 1.73 static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load)
233 vapier 1.39 {
234 vapier 1.71 static char ret[12];
235 vapier 1.41 char *found;
236 vapier 1.99 unsigned long i, shown, multi_stack, multi_relro, multi_load;
237     int max_pt_load;
238 vapier 1.41
239 solar 1.73 if (!show_phdr) return NULL;
240 vapier 1.41
241 vapier 1.71 memcpy(ret, "--- --- ---\0", 12);
242    
243 vapier 1.41 shown = 0;
244 vapier 1.71 multi_stack = multi_relro = multi_load = 0;
245 vapier 1.99 max_pt_load = elf_max_pt_load(elf);
246 vapier 1.44
247 vapier 1.108 #define NOTE_GNU_STACK ".note.GNU-stack"
248 solar 1.73 #define SHOW_PHDR(B) \
249 vapier 1.39 if (elf->elf_class == ELFCLASS ## B) { \
250     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
251 vapier 1.91 Elf ## B ## _Off offset; \
252     uint32_t flags, check_flags; \
253     if (elf->phdr != NULL) { \
254     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
255     for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
256     if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
257 vapier 1.152 if (multi_stack++) \
258     warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
259     if (file_matches_list(elf->filename, qa_execstack)) \
260     continue; \
261     found = found_phdr; \
262     offset = 0; \
263     check_flags = PF_X; \
264 vapier 1.91 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
265 vapier 1.152 if (multi_relro++) \
266     warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
267 vapier 1.91 found = found_relro; \
268     offset = 4; \
269     check_flags = PF_X; \
270     } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
271 solar 1.188 if (EGET(ehdr->e_type) == ET_DYN || EGET(ehdr->e_type) == ET_EXEC) \
272 vapier 1.152 if (multi_load++ > max_pt_load) \
273     warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
274     if (file_matches_list(elf->filename, qa_wx_load)) \
275     continue; \
276     found = found_load; \
277     offset = 8; \
278     check_flags = PF_W|PF_X; \
279 vapier 1.91 } else \
280     continue; \
281     flags = EGET(phdr[i].p_flags); \
282     if (be_quiet && ((flags & check_flags) != check_flags)) \
283     continue; \
284 solar 1.130 if ((EGET(phdr[i].p_type) != PT_LOAD) && (fix_elf && ((flags & PF_X) != flags))) { \
285 vapier 1.101 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \
286     ret[3] = ret[7] = '!'; \
287     flags = EGET(phdr[i].p_flags); \
288     } \
289 vapier 1.91 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
290     *found = 1; \
291     ++shown; \
292     } \
293     } else if (elf->shdr != NULL) { \
294     /* no program headers which means this is prob an object file */ \
295     Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
296     Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
297 vapier 1.108 char *str; \
298 vapier 1.118 if ((void*)strtbl > (void*)elf->data_end) \
299 vapier 1.108 goto skip_this_shdr##B; \
300 vapier 1.91 check_flags = SHF_WRITE|SHF_EXECINSTR; \
301     for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
302     if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
303     offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
304 vapier 1.108 str = elf->data + offset; \
305     if (str > elf->data + offset + sizeof(NOTE_GNU_STACK)) continue; \
306     if (!strcmp(str, NOTE_GNU_STACK)) { \
307 vapier 1.91 if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \
308     flags = EGET(shdr[i].sh_flags); \
309     if (be_quiet && ((flags & check_flags) != check_flags)) \
310     continue; \
311     ++*found_phdr; \
312     shown = 1; \
313     if (flags & SHF_WRITE) ret[0] = 'W'; \
314     if (flags & SHF_ALLOC) ret[1] = 'A'; \
315     if (flags & SHF_EXECINSTR) ret[2] = 'X'; \
316     if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \
317     break; \
318     } \
319     } \
320 vapier 1.108 skip_this_shdr##B: \
321 vapier 1.91 if (!multi_stack) { \
322 vapier 1.158 if (file_matches_list(elf->filename, qa_execstack)) \
323     return NULL; \
324 vapier 1.91 *found_phdr = 1; \
325     shown = 1; \
326     memcpy(ret, "!WX", 3); \
327     } \
328 vapier 1.39 } \
329     }
330 solar 1.73 SHOW_PHDR(32)
331     SHOW_PHDR(64)
332 vapier 1.44
333 solar 1.127 if (be_wewy_wewy_quiet || (be_quiet && !shown))
334 vapier 1.41 return NULL;
335     else
336     return ret;
337 vapier 1.39 }
338 kevquinn 1.142
339 vapier 1.186 /*
340     * See if this ELF contains a DT_TEXTREL tag in any of its
341     * PT_DYNAMIC sections.
342     */
343 vapier 1.90 static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
344 vapier 1.39 {
345 vapier 1.90 static const char *ret = "TEXTREL";
346 vapier 1.44 unsigned long i;
347 vapier 1.41
348 vapier 1.79 if (!show_textrel && !show_textrels) return NULL;
349 vapier 1.41
350 kevquinn 1.142 if (file_matches_list(elf->filename, qa_textrels)) return NULL;
351    
352 vapier 1.44 if (elf->phdr) {
353 vapier 1.39 #define SHOW_TEXTREL(B) \
354     if (elf->elf_class == ELFCLASS ## B) { \
355     Elf ## B ## _Dyn *dyn; \
356     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
357     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
358 vapier 1.44 Elf ## B ## _Off offset; \
359 vapier 1.39 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
360 vapier 1.185 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
361 vapier 1.44 offset = EGET(phdr[i].p_offset); \
362     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
363     dyn = DYN ## B (elf->data + offset); \
364 vapier 1.39 while (EGET(dyn->d_tag) != DT_NULL) { \
365     if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
366     *found_textrel = 1; \
367     /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
368 solar 1.127 return (be_wewy_wewy_quiet ? NULL : ret); \
369 vapier 1.39 } \
370     ++dyn; \
371 vapier 1.26 } \
372 vapier 1.39 } }
373     SHOW_TEXTREL(32)
374     SHOW_TEXTREL(64)
375 vapier 1.44 }
376    
377 solar 1.127 if (be_quiet || be_wewy_wewy_quiet)
378 vapier 1.41 return NULL;
379     else
380 vapier 1.90 return " - ";
381 vapier 1.39 }
382 solar 1.180
383 vapier 1.186 /*
384     * Scan the .text section to see if there are any relocations in it.
385     * Should rewrite this to check PT_LOAD sections that are marked
386     * Executable rather than the section named '.text'.
387     */
388 vapier 1.79 static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
389 vapier 1.76 {
390 vapier 1.82 unsigned long s, r, rmax;
391     void *symtab_void, *strtab_void, *text_void;
392 vapier 1.76
393     if (!show_textrels) return NULL;
394    
395 vapier 1.79 /* don't search for TEXTREL's if the ELF doesn't have any */
396     if (!*found_textrel) scanelf_file_textrel(elf, found_textrel);
397     if (!*found_textrel) return NULL;
398    
399 vapier 1.77 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
400 vapier 1.82 text_void = elf_findsecbyname(elf, ".text");
401 vapier 1.76
402 vapier 1.82 if (symtab_void && strtab_void && text_void && elf->shdr) {
403 vapier 1.76 #define SHOW_TEXTRELS(B) \
404     if (elf->elf_class == ELFCLASS ## B) { \
405     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
406     Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
407     Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
408     Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
409 vapier 1.82 Elf ## B ## _Shdr *text = SHDR ## B (text_void); \
410     Elf ## B ## _Addr vaddr = EGET(text->sh_addr); \
411     uint ## B ## _t memsz = EGET(text->sh_size); \
412 vapier 1.76 Elf ## B ## _Rel *rel; \
413     Elf ## B ## _Rela *rela; \
414     /* search the section headers for relocations */ \
415     for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
416     uint32_t sh_type = EGET(shdr[s].sh_type); \
417     if (sh_type == SHT_REL) { \
418     rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \
419     rela = NULL; \
420     rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
421     } else if (sh_type == SHT_RELA) { \
422     rel = NULL; \
423     rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \
424     rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
425     } else \
426     continue; \
427 vapier 1.82 /* now see if any of the relocs are in the .text */ \
428     for (r = 0; r < rmax; ++r) { \
429     unsigned long sym_max; \
430     Elf ## B ## _Addr offset_tmp; \
431     Elf ## B ## _Sym *func; \
432     Elf ## B ## _Sym *sym; \
433     Elf ## B ## _Addr r_offset; \
434     uint ## B ## _t r_info; \
435     if (sh_type == SHT_REL) { \
436     r_offset = EGET(rel[r].r_offset); \
437     r_info = EGET(rel[r].r_info); \
438     } else { \
439     r_offset = EGET(rela[r].r_offset); \
440     r_info = EGET(rela[r].r_info); \
441     } \
442     /* make sure this relocation is inside of the .text */ \
443     if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
444     if (be_verbose <= 2) continue; \
445     } else \
446 vapier 1.78 *found_textrels = 1; \
447 vapier 1.82 /* locate this relocation symbol name */ \
448     sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
449 vapier 1.112 if ((void*)sym > (void*)elf->data_end) { \
450 vapier 1.111 warn("%s: corrupt ELF symbol", elf->filename); \
451 vapier 1.109 continue; \
452     } \
453 vapier 1.82 sym_max = ELF ## B ## _R_SYM(r_info); \
454     if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
455     sym += sym_max; \
456     else \
457     sym = NULL; \
458     sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
459     /* show the raw details about this reloc */ \
460 vapier 1.88 printf(" %s: ", elf->base_filename); \
461 vapier 1.82 if (sym && sym->st_name) \
462     printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \
463     else \
464 vapier 1.169 printf("(memory/data?)"); \
465 vapier 1.82 printf(" [0x%lX]", (unsigned long)r_offset); \
466     /* now try to find the closest symbol that this rel is probably in */ \
467     sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
468     func = NULL; \
469     offset_tmp = 0; \
470     while (sym_max--) { \
471     if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
472     func = sym; \
473     offset_tmp = EGET(sym->st_value); \
474 vapier 1.76 } \
475 vapier 1.82 ++sym; \
476 vapier 1.76 } \
477 vapier 1.82 printf(" in "); \
478 vapier 1.169 if (func && func->st_name) { \
479     const char *func_name = elf->data + EGET(strtab->sh_offset) + EGET(func->st_name); \
480     if (r_offset > EGET(func->st_size)) \
481     printf("(optimized out: previous %s)", func_name); \
482     else \
483     printf("%s", func_name); \
484     } else \
485     printf("(optimized out)"); \
486 vapier 1.82 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
487 solar 1.170 if (be_verbose && has_objdump) { \
488 vapier 1.187 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
489 vapier 1.167 char *sysbuf; \
490     size_t syslen; \
491     const char sysfmt[] = "objdump -r -R -d -w -l --start-address=0x%lX --stop-address=0x%lX %s | grep --color -i -C 3 '.*[[:space:]]%lX:[[:space:]]*R_.*'\n"; \
492     syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
493     sysbuf = xmalloc(syslen); \
494 vapier 1.187 if (end_addr < r_offset) \
495     /* not uncommon when things are optimized out */ \
496     end_addr = r_offset + 0x100; \
497     snprintf(sysbuf, syslen, sysfmt, \
498     (unsigned long)offset_tmp, \
499     (unsigned long)end_addr, \
500     elf->filename, \
501     (unsigned long)r_offset); \
502     fflush(stdout); \
503     system(sysbuf); \
504     fflush(stdout); \
505     free(sysbuf); \
506 vapier 1.167 } \
507 vapier 1.76 } \
508     } }
509     SHOW_TEXTRELS(32)
510     SHOW_TEXTRELS(64)
511     }
512 vapier 1.82 if (!*found_textrels)
513     warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
514 vapier 1.76
515     return NULL;
516     }
517 solar 1.83
518 vapier 1.102 static void rpath_security_checks(elfobj *, char *, const char *);
519     static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
520 vapier 1.100 {
521 solar 1.83 struct stat st;
522 vapier 1.84 switch (*item) {
523 vapier 1.89 case '/': break;
524     case '.':
525 vapier 1.102 warnf("Security problem with relative %s '%s' in %s", dt_type, item, elf->filename);
526 vapier 1.89 break;
527 vapier 1.100 case ':':
528 vapier 1.89 case '\0':
529 vapier 1.102 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
530 solar 1.83 break;
531     case '$':
532 vapier 1.84 if (fstat(elf->fd, &st) != -1)
533 solar 1.83 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
534 vapier 1.157 warnf("Security problem with %s='%s' in %s with mode set of %o",
535 solar 1.176 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
536 solar 1.83 break;
537     default:
538 vapier 1.102 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
539 solar 1.83 break;
540     }
541     }
542 vapier 1.41 static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
543 vapier 1.39 {
544 vapier 1.48 unsigned long i, s;
545     char *rpath, *runpath, **r;
546 vapier 1.39 void *strtbl_void;
547 vapier 1.10
548 vapier 1.39 if (!show_rpath) return;
549 vapier 1.10
550 vapier 1.39 strtbl_void = elf_findsecbyname(elf, ".dynstr");
551     rpath = runpath = NULL;
552 vapier 1.10
553 vapier 1.44 if (elf->phdr && strtbl_void) {
554 vapier 1.26 #define SHOW_RPATH(B) \
555     if (elf->elf_class == ELFCLASS ## B) { \
556     Elf ## B ## _Dyn *dyn; \
557     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
558     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
559     Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
560 vapier 1.44 Elf ## B ## _Off offset; \
561 vapier 1.60 Elf ## B ## _Xword word; \
562 vapier 1.48 /* Scan all the program headers */ \
563 vapier 1.26 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
564 vapier 1.48 /* Just scan dynamic headers */ \
565 vapier 1.185 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
566 vapier 1.44 offset = EGET(phdr[i].p_offset); \
567     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
568 vapier 1.48 /* Just scan dynamic RPATH/RUNPATH headers */ \
569 vapier 1.44 dyn = DYN ## B (elf->data + offset); \
570 vapier 1.48 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
571     if (word == DT_RPATH) { \
572     r = &rpath; \
573     } else if (word == DT_RUNPATH) { \
574     r = &runpath; \
575     } else { \
576     ++dyn; \
577     continue; \
578     } \
579     /* Verify the memory is somewhat sane */ \
580     offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
581 vapier 1.69 if (offset < (Elf ## B ## _Off)elf->len) { \
582 vapier 1.48 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
583     *r = (char*)(elf->data + offset); \
584 vapier 1.103 /* cache the length in case we need to nuke this section later on */ \
585     if (fix_elf) \
586     offset = strlen(*r); \
587 vapier 1.48 /* If quiet, don't output paths in ld.so.conf */ \
588 vapier 1.69 if (be_quiet) { \
589     size_t len; \
590     char *start, *end; \
591 vapier 1.75 /* note that we only 'chop' off leading known paths. */ \
592     /* since *r is read-only memory, we can only move the ptr forward. */ \
593     start = *r; \
594     /* scan each path in : delimited list */ \
595     while (start) { \
596 vapier 1.102 rpath_security_checks(elf, start, get_elfdtype(word)); \
597 vapier 1.69 end = strchr(start, ':'); \
598 vapier 1.75 len = (end ? abs(end - start) : strlen(start)); \
599 vapier 1.102 if (use_ldcache) \
600     for (s = 0; ldpaths[s]; ++s) \
601     if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
602     *r = end; \
603     /* corner case ... if RPATH reads "/usr/lib:", we want \
604     * to show ':' rather than '' */ \
605     if (end && end[1] != '\0') \
606     (*r)++; \
607     break; \
608     } \
609 vapier 1.100 if (!*r || !end) \
610     break; \
611 vapier 1.75 else \
612     start = start + len + 1; \
613 vapier 1.69 } \
614     } \
615 vapier 1.101 if (*r) { \
616 solar 1.107 if (fix_elf > 2 || (fix_elf && **r == '\0')) { \
617 vapier 1.101 /* just nuke it */ \
618     nuke_it##B: \
619 vapier 1.103 memset(*r, 0x00, offset); \
620 vapier 1.102 *r = NULL; \
621 vapier 1.101 ESET(dyn->d_tag, DT_DEBUG); \
622 vapier 1.103 ESET(dyn->d_un.d_ptr, 0); \
623 vapier 1.101 } else if (fix_elf) { \
624     /* try to clean "bad" paths */ \
625     size_t len, tmpdir_len; \
626     char *start, *end; \
627     const char *tmpdir; \
628     start = *r; \
629     tmpdir = (getenv("TMPDIR") ? : "."); \
630     tmpdir_len = strlen(tmpdir); \
631     while (1) { \
632     end = strchr(start, ':'); \
633     if (start == end) { \
634     eat_this_path##B: \
635     len = strlen(end); \
636     memmove(start, end+1, len); \
637     start[len-1] = '\0'; \
638     end = start - 1; \
639     } else if (tmpdir && !strncmp(start, tmpdir, tmpdir_len)) { \
640     if (!end) { \
641     if (start == *r) \
642     goto nuke_it##B; \
643     *--start = '\0'; \
644     } else \
645     goto eat_this_path##B; \
646     } \
647     if (!end) \
648     break; \
649     start = end + 1; \
650     } \
651 vapier 1.102 if (**r == '\0') \
652     goto nuke_it##B; \
653 vapier 1.101 } \
654 vapier 1.102 if (*r) \
655     *found_rpath = 1; \
656 vapier 1.101 } \
657 vapier 1.26 } \
658     ++dyn; \
659     } \
660     } }
661     SHOW_RPATH(32)
662     SHOW_RPATH(64)
663 vapier 1.10 }
664 vapier 1.41
665 solar 1.127 if (be_wewy_wewy_quiet) return;
666 vapier 1.70
667 vapier 1.39 if (rpath && runpath) {
668 vapier 1.41 if (!strcmp(rpath, runpath)) {
669     xstrcat(ret, runpath, ret_len);
670     } else {
671 vapier 1.39 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath);
672 vapier 1.41 xchrcat(ret, '{', ret_len);
673     xstrcat(ret, rpath, ret_len);
674     xchrcat(ret, ',', ret_len);
675     xstrcat(ret, runpath, ret_len);
676     xchrcat(ret, '}', ret_len);
677 vapier 1.39 }
678     } else if (rpath || runpath)
679 vapier 1.41 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
680     else if (!be_quiet)
681     xstrcat(ret, " - ", ret_len);
682 vapier 1.39 }
683 solar 1.96
684     #define LDSO_CACHE_MAGIC "ld.so-"
685     #define LDSO_CACHE_MAGIC_LEN (sizeof LDSO_CACHE_MAGIC -1)
686     #define LDSO_CACHE_VER "1.7.0"
687     #define LDSO_CACHE_VER_LEN (sizeof LDSO_CACHE_VER -1)
688 vapier 1.97 #define FLAG_ANY -1
689     #define FLAG_TYPE_MASK 0x00ff
690     #define FLAG_LIBC4 0x0000
691     #define FLAG_ELF 0x0001
692     #define FLAG_ELF_LIBC5 0x0002
693     #define FLAG_ELF_LIBC6 0x0003
694     #define FLAG_REQUIRED_MASK 0xff00
695     #define FLAG_SPARC_LIB64 0x0100
696     #define FLAG_IA64_LIB64 0x0200
697     #define FLAG_X8664_LIB64 0x0300
698     #define FLAG_S390_LIB64 0x0400
699     #define FLAG_POWERPC_LIB64 0x0500
700     #define FLAG_MIPS64_LIBN32 0x0600
701     #define FLAG_MIPS64_LIBN64 0x0700
702 solar 1.96
703 vapier 1.97 static char *lookup_cache_lib(elfobj *, char *);
704 vapier 1.148
705 flameeyes 1.141 #if defined(__GLIBC__) || defined(__UCLIBC__)
706 vapier 1.148
707 vapier 1.97 static char *lookup_cache_lib(elfobj *elf, char *fname)
708 solar 1.96 {
709     int fd = 0;
710     char *strs;
711 vapier 1.104 static char buf[__PAX_UTILS_PATH_MAX] = "";
712 solar 1.96 const char *cachefile = "/etc/ld.so.cache";
713     struct stat st;
714    
715     typedef struct {
716     char magic[LDSO_CACHE_MAGIC_LEN];
717     char version[LDSO_CACHE_VER_LEN];
718     int nlibs;
719     } header_t;
720 vapier 1.97 header_t *header;
721 solar 1.96
722     typedef struct {
723     int flags;
724     int sooffset;
725     int liboffset;
726     } libentry_t;
727     libentry_t *libent;
728    
729     if (fname == NULL)
730     return NULL;
731    
732     if (ldcache == 0) {
733 vapier 1.97 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1)
734 solar 1.96 return NULL;
735 vapier 1.97
736     /* cache these values so we only map/unmap the cache file once */
737 solar 1.96 ldcache_size = st.st_size;
738 vapier 1.97 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
739    
740     close(fd);
741 solar 1.96
742 vapier 1.202 if (ldcache == MAP_FAILED) {
743 solar 1.116 ldcache = 0;
744 solar 1.96 return NULL;
745 solar 1.116 }
746 solar 1.96
747     if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN))
748     return NULL;
749     if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
750     return NULL;
751     }
752    
753     header = (header_t *) ldcache;
754     libent = (libentry_t *) (ldcache + sizeof(header_t));
755     strs = (char *) &libent[header->nlibs];
756    
757     for (fd = 0; fd < header->nlibs; fd++) {
758 vapier 1.97 /* this should be more fine grained, but for now we assume that
759     * diff arches will not be cached together. and we ignore the
760     * the different multilib mips cases. */
761     if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
762     continue;
763     if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
764     continue;
765    
766 solar 1.96 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
767     continue;
768     strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
769     }
770     return buf;
771     }
772 solar 1.154 #elif defined(__NetBSD__)
773     static char *lookup_cache_lib(elfobj *elf, char *fname)
774     {
775     static char buf[__PAX_UTILS_PATH_MAX] = "";
776     static struct stat st;
777    
778     char **ldpath;
779     for (ldpath = ldpaths; *ldpath != NULL; ldpath++) {
780     if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", *ldpath, fname) >= sizeof(buf))
781     continue; /* if the pathname is too long, or something went wrong, ignore */
782    
783     if (stat(buf, &st) != 0)
784     continue; /* if the lib doesn't exist in *ldpath, look further */
785    
786     /* NetBSD doesn't actually do sanity checks, it just loads the file
787     * and if that doesn't work, continues looking in other directories.
788     * This cannot easily be safely emulated, unfortunately. For now,
789     * just assume that if it exists, it's a valid library. */
790 vapier 1.148
791 solar 1.154 return buf;
792     }
793    
794     /* not found in any path */
795     return NULL;
796     }
797 flameeyes 1.141 #else
798 vapier 1.192 #ifdef __ELF__
799 vapier 1.148 #warning Cache support not implemented for your target
800 vapier 1.192 #endif
801 flameeyes 1.141 static char *lookup_cache_lib(elfobj *elf, char *fname)
802     {
803     return NULL;
804     }
805     #endif
806 solar 1.96
807 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)
808 vapier 1.39 {
809 vapier 1.44 unsigned long i;
810 vapier 1.39 char *needed;
811     void *strtbl_void;
812 solar 1.96 char *p;
813 vapier 1.39
814 vapier 1.72 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
815 vapier 1.10
816 vapier 1.39 strtbl_void = elf_findsecbyname(elf, ".dynstr");
817 vapier 1.32
818 vapier 1.44 if (elf->phdr && strtbl_void) {
819 vapier 1.32 #define SHOW_NEEDED(B) \
820     if (elf->elf_class == ELFCLASS ## B) { \
821     Elf ## B ## _Dyn *dyn; \
822     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
823     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
824     Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
825 vapier 1.44 Elf ## B ## _Off offset; \
826 vapier 1.32 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
827 vapier 1.185 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
828 vapier 1.44 offset = EGET(phdr[i].p_offset); \
829     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
830     dyn = DYN ## B (elf->data + offset); \
831 vapier 1.32 while (EGET(dyn->d_tag) != DT_NULL) { \
832     if (EGET(dyn->d_tag) == DT_NEEDED) { \
833 vapier 1.44 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
834 vapier 1.69 if (offset >= (Elf ## B ## _Off)elf->len) { \
835 vapier 1.49 ++dyn; \
836     continue; \
837     } \
838 vapier 1.44 needed = (char*)(elf->data + offset); \
839 vapier 1.72 if (op == 0) { \
840 solar 1.127 if (!be_wewy_wewy_quiet) { \
841 vapier 1.72 if (*found_needed) xchrcat(ret, ',', ret_len); \
842 vapier 1.102 if (use_ldcache) \
843 vapier 1.97 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
844 solar 1.96 needed = p; \
845 vapier 1.72 xstrcat(ret, needed, ret_len); \
846     } \
847     *found_needed = 1; \
848     } else { \
849 solar 1.176 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \
850 vapier 1.81 *found_lib = 1; \
851 solar 1.127 return (be_wewy_wewy_quiet ? NULL : needed); \
852 vapier 1.81 } \
853 vapier 1.72 } \
854 vapier 1.32 } \
855     ++dyn; \
856     } \
857     } }
858     SHOW_NEEDED(32)
859     SHOW_NEEDED(64)
860 vapier 1.85 if (op == 0 && !*found_needed && be_verbose)
861 vapier 1.84 warn("ELF lacks DT_NEEDED sections: %s", elf->filename);
862 vapier 1.32 }
863 vapier 1.72
864     return NULL;
865 vapier 1.39 }
866 vapier 1.41 static char *scanelf_file_interp(elfobj *elf, char *found_interp)
867 vapier 1.39 {
868     void *strtbl_void;
869    
870 vapier 1.41 if (!show_interp) return NULL;
871 vapier 1.32
872 vapier 1.39 strtbl_void = elf_findsecbyname(elf, ".interp");
873 vapier 1.38
874 vapier 1.39 if (strtbl_void) {
875 vapier 1.38 #define SHOW_INTERP(B) \
876     if (elf->elf_class == ELFCLASS ## B) { \
877 solar 1.40 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
878     *found_interp = 1; \
879 solar 1.127 return (be_wewy_wewy_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \
880 vapier 1.38 }
881     SHOW_INTERP(32)
882     SHOW_INTERP(64)
883     }
884 vapier 1.41 return NULL;
885 vapier 1.39 }
886 vapier 1.49 static char *scanelf_file_bind(elfobj *elf, char *found_bind)
887     {
888     unsigned long i;
889     struct stat s;
890 solar 1.131 char dynamic = 0;
891 vapier 1.49
892     if (!show_bind) return NULL;
893 vapier 1.51 if (!elf->phdr) return NULL;
894 vapier 1.49
895     #define SHOW_BIND(B) \
896     if (elf->elf_class == ELFCLASS ## B) { \
897     Elf ## B ## _Dyn *dyn; \
898     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
899     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
900     Elf ## B ## _Off offset; \
901     for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
902 vapier 1.185 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
903 solar 1.131 dynamic = 1; \
904 vapier 1.49 offset = EGET(phdr[i].p_offset); \
905     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
906     dyn = DYN ## B (elf->data + offset); \
907     while (EGET(dyn->d_tag) != DT_NULL) { \
908     if (EGET(dyn->d_tag) == DT_BIND_NOW || \
909     (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
910     { \
911     if (be_quiet) return NULL; \
912     *found_bind = 1; \
913 solar 1.127 return (char *)(be_wewy_wewy_quiet ? NULL : "NOW"); \
914 vapier 1.49 } \
915     ++dyn; \
916     } \
917     } \
918     }
919     SHOW_BIND(32)
920     SHOW_BIND(64)
921    
922 solar 1.127 if (be_wewy_wewy_quiet) return NULL;
923 vapier 1.70
924 vapier 1.159 /* don't output anything if quiet mode and the ELF is static or not setuid */
925     if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
926 vapier 1.49 return NULL;
927     } else {
928     *found_bind = 1;
929 solar 1.131 return (char *) (dynamic ? "LAZY" : "STATIC");
930 vapier 1.49 }
931     }
932 vapier 1.84 static char *scanelf_file_soname(elfobj *elf, char *found_soname)
933     {
934     unsigned long i;
935     char *soname;
936     void *strtbl_void;
937    
938     if (!show_soname) return NULL;
939    
940     strtbl_void = elf_findsecbyname(elf, ".dynstr");
941    
942     if (elf->phdr && strtbl_void) {
943     #define SHOW_SONAME(B) \
944     if (elf->elf_class == ELFCLASS ## B) { \
945     Elf ## B ## _Dyn *dyn; \
946     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
947     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
948     Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
949     Elf ## B ## _Off offset; \
950     /* only look for soname in shared objects */ \
951 solar 1.188 if (EGET(ehdr->e_type) != ET_DYN) \
952 vapier 1.84 return NULL; \
953     for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
954 vapier 1.185 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
955 vapier 1.84 offset = EGET(phdr[i].p_offset); \
956     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
957     dyn = DYN ## B (elf->data + offset); \
958     while (EGET(dyn->d_tag) != DT_NULL) { \
959     if (EGET(dyn->d_tag) == DT_SONAME) { \
960     offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
961     if (offset >= (Elf ## B ## _Off)elf->len) { \
962     ++dyn; \
963     continue; \
964     } \
965     soname = (char*)(elf->data + offset); \
966     *found_soname = 1; \
967 solar 1.127 return (be_wewy_wewy_quiet ? NULL : soname); \
968 vapier 1.84 } \
969     ++dyn; \
970     } \
971     } }
972     SHOW_SONAME(32)
973     SHOW_SONAME(64)
974     }
975    
976     return NULL;
977     }
978 solar 1.177
979 flameeyes 1.198 static int scanelf_match_symname(const char *symname, const char *tomatch) {
980 flameeyes 1.197 /* We do things differently when checking with regexp */
981     if (g_match) {
982 flameeyes 1.198 return rematch(symname, tomatch, REG_EXTENDED) == 0;
983 flameeyes 1.197 } else {
984     const size_t symname_len = strlen(symname);
985 flameeyes 1.198 return (strncmp(symname, tomatch, symname_len) == 0 &&
986     /* Accept unversioned symbol names */
987     (tomatch[symname_len] == '\0' || tomatch[symname_len] == '@'));
988 flameeyes 1.197 }
989     }
990    
991 vapier 1.72 static char *scanelf_file_sym(elfobj *elf, char *found_sym)
992 vapier 1.39 {
993 vapier 1.44 unsigned long i;
994 vapier 1.95 char *ret;
995 vapier 1.39 void *symtab_void, *strtab_void;
996 vapier 1.38
997 vapier 1.41 if (!find_sym) return NULL;
998 vapier 1.95 ret = find_sym;
999 vapier 1.32
1000 vapier 1.77 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
1001 vapier 1.27
1002 vapier 1.39 if (symtab_void && strtab_void) {
1003 vapier 1.27 #define FIND_SYM(B) \
1004     if (elf->elf_class == ELFCLASS ## B) { \
1005     Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
1006     Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
1007     Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
1008 vapier 1.115 unsigned long cnt = EGET(symtab->sh_entsize); \
1009 vapier 1.27 char *symname; \
1010 vapier 1.115 if (cnt) \
1011     cnt = EGET(symtab->sh_size) / cnt; \
1012 vapier 1.27 for (i = 0; i < cnt; ++i) { \
1013 flameeyes 1.196 if ((void*)sym > (void*)elf->data_end) { \
1014 flameeyes 1.195 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1015     goto break_out; \
1016     } \
1017 vapier 1.27 if (sym->st_name) { \
1018 vapier 1.134 /* make sure the symbol name is in acceptable memory range */ \
1019 vapier 1.27 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
1020 vapier 1.115 if ((void*)symname > (void*)elf->data_end) { \
1021     warnf("%s: corrupt ELF symbols", elf->filename); \
1022 vapier 1.134 ++sym; \
1023 vapier 1.111 continue; \
1024     } \
1025 vapier 1.134 /* debug display ... show all symbols and some extra info */ \
1026 flameeyes 1.197 if (0 && g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \
1027 solar 1.177 printf("%s(%s) %5lX %15s %s %s\n", \
1028 vapier 1.39 ((*found_sym == 0) ? "\n\t" : "\t"), \
1029 vapier 1.76 elf->base_filename, \
1030 vapier 1.94 (unsigned long)sym->st_size, \
1031 vapier 1.95 get_elfstttype(sym->st_info), \
1032 solar 1.177 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1033 vapier 1.39 *found_sym = 1; \
1034 vapier 1.95 } else { \
1035 vapier 1.134 /* allow the user to specify a comma delimited list of symbols to search for */ \
1036 flameeyes 1.198 char *this_sym, *next_sym; \
1037 flameeyes 1.197 next_sym = ret; \
1038     while (next_sym) { \
1039     this_sym = next_sym; \
1040     if ((next_sym = strchr(this_sym, ','))) \
1041 grobian 1.200 next_sym += 1; /* Skip the comma */ \
1042 vapier 1.134 /* do we want a defined symbol ? */ \
1043     if (*this_sym == '+') { \
1044 vapier 1.140 if (sym->st_shndx == SHN_UNDEF) \
1045 flameeyes 1.197 continue; \
1046 vapier 1.134 ++this_sym; \
1047     /* do we want an undefined symbol ? */ \
1048     } else if (*this_sym == '-') { \
1049 vapier 1.140 if (sym->st_shndx != SHN_UNDEF) \
1050 flameeyes 1.197 continue; \
1051 vapier 1.134 ++this_sym; \
1052     } \
1053 grobian 1.200 if (next_sym) /* Copy it so that we don't have to worry about the final , */ \
1054     this_sym = strndup(this_sym, next_sym-this_sym); \
1055 vapier 1.134 /* ok, lets compare the name now */ \
1056 flameeyes 1.198 if (scanelf_match_symname(this_sym, symname)) { \
1057 solar 1.132 if (be_semi_verbose) { \
1058     char buf[126]; \
1059     snprintf(buf, sizeof(buf), "%lX %s %s", \
1060     (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1061     ret = buf; \
1062     } else \
1063 flameeyes 1.197 ret = symname; \
1064 vapier 1.95 (*found_sym)++; \
1065     goto break_out; \
1066     } \
1067 grobian 1.200 if (next_sym) free(this_sym); \
1068 flameeyes 1.197 } \
1069 vapier 1.95 } \
1070 vapier 1.27 } \
1071     ++sym; \
1072     } }
1073     FIND_SYM(32)
1074     FIND_SYM(64)
1075 vapier 1.39 }
1076 vapier 1.70
1077 vapier 1.95 break_out:
1078 solar 1.127 if (be_wewy_wewy_quiet) return NULL;
1079 vapier 1.70
1080 vapier 1.41 if (*find_sym != '*' && *found_sym)
1081 vapier 1.95 return ret;
1082 vapier 1.41 if (be_quiet)
1083     return NULL;
1084     else
1085 solar 1.68 return (char *)" - ";
1086 vapier 1.39 }
1087 solar 1.119
1088 solar 1.124 static char *scanelf_file_sections(elfobj *elf, char *found_section)
1089     {
1090     if (!find_section)
1091     return NULL;
1092    
1093     #define FIND_SECTION(B) \
1094     if (elf->elf_class == ELFCLASS ## B) { \
1095 solar 1.136 int invert; \
1096 solar 1.124 Elf ## B ## _Shdr *section; \
1097 solar 1.136 invert = (*find_section == '!' ? 1 : 0); \
1098     section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \
1099     if ((section == NULL && invert) || (section != NULL && !invert)) \
1100 solar 1.124 *found_section = 1; \
1101     }
1102     FIND_SECTION(32)
1103     FIND_SECTION(64)
1104    
1105 vapier 1.138 if (be_wewy_wewy_quiet)
1106     return NULL;
1107 solar 1.124
1108     if (*found_section)
1109     return find_section;
1110    
1111     if (be_quiet)
1112     return NULL;
1113     else
1114     return (char *)" - ";
1115     }
1116    
1117 vapier 1.39 /* scan an elf file and show all the fun stuff */
1118 solar 1.57 #define prints(str) write(fileno(stdout), str, strlen(str))
1119 vapier 1.106 static int scanelf_elfobj(elfobj *elf)
1120 vapier 1.39 {
1121 vapier 1.44 unsigned long i;
1122 vapier 1.162 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1123     found_rpath, found_needed, found_interp, found_bind, found_soname,
1124 solar 1.124 found_sym, found_lib, found_file, found_textrels, found_section;
1125 vapier 1.41 static char *out_buffer = NULL;
1126     static size_t out_len;
1127 vapier 1.39
1128 vapier 1.76 found_pax = found_phdr = found_relro = found_load = found_textrel = \
1129 vapier 1.84 found_rpath = found_needed = found_interp = found_bind = found_soname = \
1130 solar 1.124 found_sym = found_lib = found_file = found_textrels = found_section = 0;
1131 vapier 1.39
1132 vapier 1.114 if (be_verbose > 2)
1133 vapier 1.106 printf("%s: scanning file {%s,%s}\n", elf->filename,
1134 vapier 1.69 get_elfeitype(EI_CLASS, elf->elf_class),
1135     get_elfeitype(EI_DATA, elf->data[EI_DATA]));
1136 vapier 1.114 else if (be_verbose > 1)
1137 vapier 1.106 printf("%s: scanning file\n", elf->filename);
1138 vapier 1.39
1139 vapier 1.41 /* init output buffer */
1140     if (!out_buffer) {
1141     out_len = sizeof(char) * 80;
1142 vapier 1.186 out_buffer = xmalloc(out_len);
1143 vapier 1.41 }
1144     *out_buffer = '\0';
1145    
1146 vapier 1.39 /* show the header */
1147     if (!be_quiet && show_banner) {
1148 vapier 1.49 for (i = 0; out_format[i]; ++i) {
1149 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
1150 vapier 1.41
1151     switch (out_format[++i]) {
1152 solar 1.132 case '+': break;
1153 vapier 1.41 case '%': break;
1154 vapier 1.70 case '#': break;
1155 vapier 1.66 case 'F':
1156     case 'p':
1157     case 'f': prints("FILE "); found_file = 1; break;
1158 vapier 1.41 case 'o': prints(" TYPE "); break;
1159     case 'x': prints(" PAX "); break;
1160 vapier 1.71 case 'e': prints("STK/REL/PTL "); break;
1161 vapier 1.41 case 't': prints("TEXTREL "); break;
1162     case 'r': prints("RPATH "); break;
1163 vapier 1.171 case 'M': prints("CLASS "); break;
1164 vapier 1.41 case 'n': prints("NEEDED "); break;
1165     case 'i': prints("INTERP "); break;
1166 vapier 1.49 case 'b': prints("BIND "); break;
1167 solar 1.190 case 'Z': prints("SIZE "); break;
1168 vapier 1.84 case 'S': prints("SONAME "); break;
1169 vapier 1.41 case 's': prints("SYM "); break;
1170 vapier 1.72 case 'N': prints("LIB "); break;
1171 vapier 1.76 case 'T': prints("TEXTRELS "); break;
1172 vapier 1.126 case 'k': prints("SECTION "); break;
1173 vapier 1.166 case 'a': prints("ARCH "); break;
1174 solar 1.191 case 'I': prints("OSABI "); break;
1175     case 'Y': prints("EABI "); break;
1176 solar 1.180 case 'O': prints("PERM "); break;
1177 solar 1.181 case 'D': prints("ENDIAN "); break;
1178 vapier 1.76 default: warnf("'%c' has no title ?", out_format[i]);
1179 vapier 1.39 }
1180 vapier 1.27 }
1181 vapier 1.49 if (!found_file) prints("FILE ");
1182 vapier 1.41 prints("\n");
1183 vapier 1.49 found_file = 0;
1184 vapier 1.39 show_banner = 0;
1185     }
1186    
1187     /* dump all the good stuff */
1188 vapier 1.49 for (i = 0; out_format[i]; ++i) {
1189 vapier 1.41 const char *out;
1190 vapier 1.66 const char *tmp;
1191 solar 1.190 static char ubuf[sizeof(unsigned long)*2];
1192 vapier 1.70 if (!IS_MODIFIER(out_format[i])) {
1193 vapier 1.41 xchrcat(&out_buffer, out_format[i], &out_len);
1194     continue;
1195     }
1196 vapier 1.39
1197 vapier 1.41 out = NULL;
1198 solar 1.127 be_wewy_wewy_quiet = (out_format[i] == '#');
1199 solar 1.132 be_semi_verbose = (out_format[i] == '+');
1200 vapier 1.41 switch (out_format[++i]) {
1201 solar 1.132 case '+':
1202 vapier 1.70 case '%':
1203     case '#':
1204     xchrcat(&out_buffer, out_format[i], &out_len); break;
1205     case 'F':
1206 vapier 1.76 found_file = 1;
1207 solar 1.127 if (be_wewy_wewy_quiet) break;
1208 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
1209 vapier 1.70 break;
1210 vapier 1.66 case 'p':
1211 vapier 1.76 found_file = 1;
1212 solar 1.127 if (be_wewy_wewy_quiet) break;
1213 vapier 1.106 tmp = elf->filename;
1214 vapier 1.66 if (search_path) {
1215     ssize_t len_search = strlen(search_path);
1216 vapier 1.106 ssize_t len_file = strlen(elf->filename);
1217     if (!strncmp(elf->filename, search_path, len_search) && \
1218 vapier 1.66 len_file > len_search)
1219     tmp += len_search;
1220     if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
1221     }
1222     xstrcat(&out_buffer, tmp, &out_len);
1223     break;
1224     case 'f':
1225 vapier 1.76 found_file = 1;
1226 solar 1.127 if (be_wewy_wewy_quiet) break;
1227 vapier 1.106 tmp = strrchr(elf->filename, '/');
1228     tmp = (tmp == NULL ? elf->filename : tmp+1);
1229 vapier 1.66 xstrcat(&out_buffer, tmp, &out_len);
1230     break;
1231 vapier 1.41 case 'o': out = get_elfetype(elf); break;
1232     case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1233 solar 1.73 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
1234 vapier 1.41 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1235 vapier 1.79 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
1236 vapier 1.41 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1237 vapier 1.171 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1238 solar 1.181 case 'D': out = get_endian(elf); break;
1239 solar 1.180 case 'O': out = getstr_perms(elf->filename); break;
1240 vapier 1.72 case 'n':
1241     case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
1242 vapier 1.41 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1243 vapier 1.49 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1244 vapier 1.84 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1245 vapier 1.72 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1246 solar 1.124 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1247 vapier 1.166 case 'a': out = get_elfemtype(elf); break;
1248 solar 1.191 case 'I': out = get_elfosabi(elf); break;
1249     case 'Y': out = get_elf_eabi(elf); break;
1250 vapier 1.193 case 'Z': snprintf(ubuf, sizeof(ubuf), "%lu", (unsigned long)elf->len); out = ubuf; break;;
1251 vapier 1.76 default: warnf("'%c' has no scan code?", out_format[i]);
1252 vapier 1.29 }
1253 vapier 1.95 if (out) {
1254     /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1255     if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1256     xstrncat(&out_buffer, out, &out_len, (tmp-out));
1257     else
1258     xstrcat(&out_buffer, out, &out_len);
1259     }
1260 vapier 1.39 }
1261    
1262 vapier 1.54 #define FOUND_SOMETHING() \
1263 solar 1.73 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1264 vapier 1.76 found_rpath || found_needed || found_interp || found_bind || \
1265 solar 1.124 found_soname || found_sym || found_lib || found_textrels || found_section )
1266 vapier 1.54
1267     if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
1268     xchrcat(&out_buffer, ' ', &out_len);
1269 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
1270 vapier 1.27 }
1271 vapier 1.79 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
1272 vapier 1.41 puts(out_buffer);
1273 vapier 1.79 fflush(stdout);
1274     }
1275 vapier 1.10
1276 vapier 1.105 return 0;
1277     }
1278    
1279 vapier 1.106 /* scan a single elf */
1280     static int scanelf_elf(const char *filename, int fd, size_t len)
1281     {
1282 solar 1.120 int ret = 1;
1283 vapier 1.106 elfobj *elf;
1284    
1285     /* verify this is real ELF */
1286     if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1287     if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1288 solar 1.120 return ret;
1289     }
1290     switch (match_bits) {
1291     case 32:
1292     if (elf->elf_class != ELFCLASS32)
1293     goto label_done;
1294     break;
1295     case 64:
1296     if (elf->elf_class != ELFCLASS64)
1297     goto label_done;
1298     break;
1299     default: break;
1300 vapier 1.106 }
1301 solar 1.119 if (strlen(match_etypes)) {
1302     char sbuf[126];
1303     strncpy(sbuf, match_etypes, sizeof(sbuf));
1304     if (strchr(match_etypes, ',') != NULL) {
1305     char *p;
1306 vapier 1.186 while ((p = strrchr(sbuf, ',')) != NULL) {
1307 solar 1.119 *p = 0;
1308 solar 1.129 if (etype_lookup(p+1) == get_etype(elf))
1309 solar 1.119 goto label_ret;
1310     }
1311     }
1312 solar 1.129 if (etype_lookup(sbuf) != get_etype(elf))
1313 solar 1.119 goto label_done;
1314     }
1315    
1316     label_ret:
1317 vapier 1.106 ret = scanelf_elfobj(elf);
1318 solar 1.119
1319     label_done:
1320 vapier 1.106 unreadelf(elf);
1321     return ret;
1322     }
1323 solar 1.119
1324 vapier 1.105 /* scan an archive of elfs */
1325 vapier 1.106 static int scanelf_archive(const char *filename, int fd, size_t len)
1326 vapier 1.105 {
1327 vapier 1.106 archive_handle *ar;
1328 vapier 1.105 archive_member *m;
1329 vapier 1.106 char *ar_buffer;
1330     elfobj *elf;
1331    
1332     ar = ar_open_fd(filename, fd);
1333     if (ar == NULL)
1334     return 1;
1335    
1336 vapier 1.201 ar_buffer = mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1337 vapier 1.106 while ((m=ar_next(ar)) != NULL) {
1338     elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1339     if (elf) {
1340     scanelf_elfobj(elf);
1341     unreadelf(elf);
1342     }
1343     }
1344     munmap(ar_buffer, len);
1345    
1346 vapier 1.105 return 0;
1347     }
1348     /* scan a file which may be an elf or an archive or some other magical beast */
1349 solar 1.164 static int scanelf_file(const char *filename, const struct stat *st_cache)
1350 vapier 1.105 {
1351 vapier 1.161 const struct stat *st = st_cache;
1352     struct stat symlink_st;
1353 vapier 1.106 int fd;
1354 vapier 1.105
1355     /* always handle regular files and handle symlinked files if no -y */
1356 vapier 1.161 if (S_ISLNK(st->st_mode)) {
1357 solar 1.164 if (!scan_symlink) return 1;
1358 vapier 1.161 stat(filename, &symlink_st);
1359     st = &symlink_st;
1360 vapier 1.105 }
1361 vapier 1.161
1362     if (!S_ISREG(st->st_mode)) {
1363 vapier 1.105 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1364 solar 1.164 return 1;
1365 vapier 1.105 }
1366    
1367 solar 1.180 if (match_perms) {
1368     if ((st->st_mode | match_perms) != st->st_mode)
1369     return 1;
1370     }
1371 vapier 1.106 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1372 solar 1.164 return 1;
1373 vapier 1.106
1374 vapier 1.161 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1375 vapier 1.105 /* if it isn't an ELF, maybe it's an .a archive */
1376 vapier 1.161 scanelf_archive(filename, fd, st->st_size);
1377 vapier 1.106
1378     close(fd);
1379 solar 1.164 return 0;
1380 solar 1.6 }
1381    
1382 solar 1.1 /* scan a directory for ET_EXEC files and print when we find one */
1383 solar 1.164 static int scanelf_dir(const char *path)
1384 solar 1.1 {
1385 vapier 1.10 register DIR *dir;
1386     register struct dirent *dentry;
1387 vapier 1.14 struct stat st_top, st;
1388 vapier 1.104 char buf[__PAX_UTILS_PATH_MAX];
1389 vapier 1.32 size_t pathlen = 0, len = 0;
1390 solar 1.164 int ret = 0;
1391 vapier 1.10
1392     /* make sure path exists */
1393 vapier 1.39 if (lstat(path, &st_top) == -1) {
1394     if (be_verbose > 2) printf("%s: does not exist\n", path);
1395 solar 1.164 return 1;
1396 vapier 1.39 }
1397 solar 1.11
1398 vapier 1.10 /* ok, if it isn't a directory, assume we can open it */
1399 vapier 1.14 if (!S_ISDIR(st_top.st_mode)) {
1400 solar 1.164 return scanelf_file(path, &st_top);
1401 vapier 1.10 }
1402    
1403     /* now scan the dir looking for fun stuff */
1404     if ((dir = opendir(path)) == NULL) {
1405     warnf("could not opendir %s: %s", path, strerror(errno));
1406 solar 1.164 return 1;
1407 vapier 1.10 }
1408 vapier 1.114 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1409 solar 1.11
1410 vapier 1.32 pathlen = strlen(path);
1411 vapier 1.10 while ((dentry = readdir(dir))) {
1412     if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
1413     continue;
1414 vapier 1.32 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
1415     if (len >= sizeof(buf)) {
1416 vapier 1.76 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1417     (unsigned long)len, (unsigned long)sizeof(buf));
1418 vapier 1.32 continue;
1419     }
1420 solar 1.143 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
1421 solar 1.20 if (lstat(buf, &st) != -1) {
1422 vapier 1.10 if (S_ISREG(st.st_mode))
1423 solar 1.164 ret = scanelf_file(buf, &st);
1424 vapier 1.10 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1425 vapier 1.14 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1426 solar 1.164 ret = scanelf_dir(buf);
1427 vapier 1.10 }
1428     }
1429     }
1430     closedir(dir);
1431 solar 1.164 return ret;
1432 solar 1.1 }
1433    
1434 vapier 1.133 static int scanelf_from_file(const char *filename)
1435 vapier 1.47 {
1436 solar 1.45 FILE *fp = NULL;
1437     char *p;
1438 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1439 solar 1.164 int ret = 0;
1440 solar 1.45
1441 solar 1.132 if (strcmp(filename, "-") == 0)
1442 solar 1.45 fp = stdin;
1443     else if ((fp = fopen(filename, "r")) == NULL)
1444     return 1;
1445    
1446 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1447 solar 1.45 if ((p = strchr(path, '\n')) != NULL)
1448     *p = 0;
1449 vapier 1.66 search_path = path;
1450 solar 1.164 ret = scanelf_dir(path);
1451 solar 1.45 }
1452     if (fp != stdin)
1453     fclose(fp);
1454 solar 1.164 return ret;
1455 solar 1.45 }
1456    
1457 solar 1.154 #if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1458 vapier 1.148
1459     static int load_ld_cache_config(int i, const char *fname)
1460 vapier 1.48 {
1461     FILE *fp = NULL;
1462     char *p;
1463 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1464 vapier 1.48
1465 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1466 solar 1.123 return i;
1467    
1468     if ((fp = fopen(fname, "r")) == NULL)
1469     return i;
1470 vapier 1.48
1471 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1472 vapier 1.48 if ((p = strrchr(path, '\r')) != NULL)
1473     *p = 0;
1474     if ((p = strchr(path, '\n')) != NULL)
1475     *p = 0;
1476 solar 1.154 #ifdef __linux__
1477 vapier 1.186 /* recursive includes of the same file will make this segfault. */
1478 solar 1.129 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1479 solar 1.123 glob64_t gl;
1480     size_t x;
1481     char gpath[__PAX_UTILS_PATH_MAX];
1482    
1483 solar 1.129 memset(gpath, 0, sizeof(gpath));
1484 solar 1.123
1485     if (path[8] != '/')
1486 solar 1.129 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]);
1487 solar 1.123 else
1488 solar 1.129 strncpy(gpath, &path[8], sizeof(gpath));
1489 solar 1.123
1490     if ((glob64(gpath, 0, NULL, &gl)) == 0) {
1491     for (x = 0; x < gl.gl_pathc; ++x) {
1492     /* try to avoid direct loops */
1493     if (strcmp(gl.gl_pathv[x], fname) == 0)
1494     continue;
1495 vapier 1.148 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1496 vapier 1.149 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1497 solar 1.123 globfree64(&gl);
1498     return i;
1499     }
1500     }
1501     globfree64 (&gl);
1502     continue;
1503 solar 1.160 }
1504 solar 1.123 }
1505 solar 1.154 #endif
1506 solar 1.123 if (*path != '/')
1507     continue;
1508 vapier 1.48
1509     ldpaths[i++] = xstrdup(path);
1510    
1511 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1512 vapier 1.48 break;
1513     }
1514     ldpaths[i] = NULL;
1515    
1516     fclose(fp);
1517 solar 1.123 return i;
1518 vapier 1.48 }
1519 flameeyes 1.141
1520 vapier 1.148 #elif defined(__FreeBSD__) || (__DragonFly__)
1521    
1522     static int load_ld_cache_config(int i, const char *fname)
1523 flameeyes 1.141 {
1524     FILE *fp = NULL;
1525     char *b = NULL, *p;
1526     struct elfhints_hdr hdr;
1527 vapier 1.152
1528 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1529 flameeyes 1.141 return i;
1530    
1531     if ((fp = fopen(fname, "r")) == NULL)
1532     return i;
1533    
1534 vapier 1.152 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1535     hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1536     fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1537     {
1538 flameeyes 1.141 fclose(fp);
1539     return i;
1540     }
1541 vapier 1.152
1542 vapier 1.186 b = xmalloc(hdr.dirlistlen + 1);
1543 vapier 1.152 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1544 flameeyes 1.141 fclose(fp);
1545     free(b);
1546     return i;
1547     }
1548 vapier 1.152
1549     while ((p = strsep(&b, ":"))) {
1550     if (*p == '\0') continue;
1551 flameeyes 1.141 ldpaths[i++] = xstrdup(p);
1552 vapier 1.152
1553 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1554 flameeyes 1.141 break;
1555     }
1556     ldpaths[i] = NULL;
1557 vapier 1.157
1558 flameeyes 1.141 free(b);
1559     fclose(fp);
1560     return i;
1561     }
1562 vapier 1.148
1563     #else
1564 vapier 1.192 #ifdef __ELF__
1565 vapier 1.148 #warning Cache config support not implemented for your target
1566 vapier 1.192 #endif
1567 vapier 1.148 static int load_ld_cache_config(int i, const char *fname)
1568     {
1569     memset(ldpaths, 0x00, sizeof(ldpaths));
1570 vapier 1.192 return 0;
1571 vapier 1.148 }
1572 flameeyes 1.141 #endif
1573 vapier 1.48
1574 vapier 1.10 /* scan /etc/ld.so.conf for paths */
1575 vapier 1.184 static void scanelf_ldpath(void)
1576 vapier 1.10 {
1577 vapier 1.17 char scan_l, scan_ul, scan_ull;
1578 vapier 1.48 int i = 0;
1579 vapier 1.10
1580 vapier 1.48 if (!ldpaths[0])
1581     err("Unable to load any paths from ld.so.conf");
1582 vapier 1.10
1583 vapier 1.17 scan_l = scan_ul = scan_ull = 0;
1584    
1585 vapier 1.48 while (ldpaths[i]) {
1586     if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
1587     if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
1588     if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
1589     scanelf_dir(ldpaths[i]);
1590     ++i;
1591     }
1592 vapier 1.10
1593 vapier 1.17 if (!scan_l) scanelf_dir("/lib");
1594     if (!scan_ul) scanelf_dir("/usr/lib");
1595     if (!scan_ull) scanelf_dir("/usr/local/lib");
1596 vapier 1.10 }
1597 solar 1.1
1598 vapier 1.10 /* scan env PATH for paths */
1599 vapier 1.184 static void scanelf_envpath(void)
1600 solar 1.1 {
1601 solar 1.34 char *path, *p;
1602 vapier 1.10
1603     path = getenv("PATH");
1604     if (!path)
1605     err("PATH is not set in your env !");
1606 vapier 1.41 path = xstrdup(path);
1607 vapier 1.10
1608     while ((p = strrchr(path, ':')) != NULL) {
1609     scanelf_dir(p + 1);
1610     *p = 0;
1611     }
1612 vapier 1.17
1613 solar 1.34 free(path);
1614 solar 1.1 }
1615    
1616 solar 1.191 /* usage / invocation handling functions */ /* Free Flags: c d j u w C G H J K P Q U W */
1617     #define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZBhV"
1618 vapier 1.27 #define a_argument required_argument
1619 vapier 1.10 static struct option const long_opts[] = {
1620     {"path", no_argument, NULL, 'p'},
1621     {"ldpath", no_argument, NULL, 'l'},
1622     {"recursive", no_argument, NULL, 'R'},
1623 vapier 1.14 {"mount", no_argument, NULL, 'm'},
1624 vapier 1.37 {"symlink", no_argument, NULL, 'y'},
1625 vapier 1.105 {"archives", no_argument, NULL, 'A'},
1626     {"ldcache", no_argument, NULL, 'L'},
1627 vapier 1.101 {"fix", no_argument, NULL, 'X'},
1628 solar 1.127 {"setpax", a_argument, NULL, 'z'},
1629 vapier 1.10 {"pax", no_argument, NULL, 'x'},
1630 solar 1.16 {"header", no_argument, NULL, 'e'},
1631 vapier 1.10 {"textrel", no_argument, NULL, 't'},
1632     {"rpath", no_argument, NULL, 'r'},
1633 vapier 1.32 {"needed", no_argument, NULL, 'n'},
1634 vapier 1.38 {"interp", no_argument, NULL, 'i'},
1635 vapier 1.49 {"bind", no_argument, NULL, 'b'},
1636 vapier 1.84 {"soname", no_argument, NULL, 'S'},
1637 vapier 1.76 {"symbol", a_argument, NULL, 's'},
1638 solar 1.124 {"section", a_argument, NULL, 'k'},
1639 vapier 1.76 {"lib", a_argument, NULL, 'N'},
1640 solar 1.86 {"gmatch", no_argument, NULL, 'g'},
1641 vapier 1.76 {"textrels", no_argument, NULL, 'T'},
1642 solar 1.119 {"etype", a_argument, NULL, 'E'},
1643 solar 1.120 {"bits", a_argument, NULL, 'M'},
1644 solar 1.181 {"endian", no_argument, NULL, 'D'},
1645 solar 1.191 {"osabi", no_argument, NULL, 'I'},
1646     {"eabi", no_argument, NULL, 'Y'},
1647 solar 1.180 {"perms", a_argument, NULL, 'O'},
1648 solar 1.190 {"size", no_argument, NULL, 'Z'},
1649 vapier 1.10 {"all", no_argument, NULL, 'a'},
1650     {"quiet", no_argument, NULL, 'q'},
1651 vapier 1.14 {"verbose", no_argument, NULL, 'v'},
1652 vapier 1.76 {"format", a_argument, NULL, 'F'},
1653     {"from", a_argument, NULL, 'f'},
1654     {"file", a_argument, NULL, 'o'},
1655 solar 1.16 {"nobanner", no_argument, NULL, 'B'},
1656 vapier 1.10 {"help", no_argument, NULL, 'h'},
1657     {"version", no_argument, NULL, 'V'},
1658     {NULL, no_argument, NULL, 0x0}
1659     };
1660 solar 1.57
1661 solar 1.68 static const char *opts_help[] = {
1662 vapier 1.10 "Scan all directories in PATH environment",
1663     "Scan all directories in /etc/ld.so.conf",
1664 vapier 1.14 "Scan directories recursively",
1665 vapier 1.37 "Don't recursively cross mount points",
1666 vapier 1.101 "Don't scan symlinks",
1667 vapier 1.105 "Scan archives (.a files)",
1668     "Utilize ld.so.cache information (use with -r/-n)",
1669 solar 1.127 "Try and 'fix' bad things (use with -r/-e)",
1670     "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
1671 vapier 1.10 "Print PaX markings",
1672 vapier 1.71 "Print GNU_STACK/PT_LOAD markings",
1673 vapier 1.10 "Print TEXTREL information",
1674     "Print RPATH information",
1675 vapier 1.32 "Print NEEDED information",
1676 vapier 1.38 "Print INTERP information",
1677 vapier 1.49 "Print BIND information",
1678 vapier 1.84 "Print SONAME information",
1679 vapier 1.27 "Find a specified symbol",
1680 solar 1.124 "Find a specified section",
1681 vapier 1.72 "Find a specified library",
1682 solar 1.86 "Use strncmp to match libraries. (use with -N)",
1683 vapier 1.76 "Locate cause of TEXTREL",
1684 solar 1.129 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1685 solar 1.120 "Print only ELF files matching numeric bits",
1686 solar 1.181 "Print Endianness",
1687 solar 1.191 "Print OSABI",
1688     "Print EABI (EM_ARM Only)",
1689 solar 1.180 "Print only ELF files matching octal permissions",
1690 solar 1.190 "Print ELF file size",
1691 vapier 1.82 "Print all scanned info (-x -e -t -r -b)\n",
1692 vapier 1.14 "Only output 'bad' things",
1693     "Be verbose (can be specified more than once)",
1694 vapier 1.39 "Use specified format for output",
1695 solar 1.45 "Read input stream from a filename",
1696 vapier 1.24 "Write output stream to a filename",
1697 vapier 1.14 "Don't display the header",
1698 vapier 1.10 "Print this help and exit",
1699     "Print version and exit",
1700     NULL
1701     };
1702    
1703     /* display usage and exit */
1704     static void usage(int status)
1705 solar 1.1 {
1706 vapier 1.44 unsigned long i;
1707 solar 1.52 printf("* Scan ELF binaries for stuff\n\n"
1708 vapier 1.105 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1709 solar 1.35 printf("Options: -[%s]\n", PARSE_FLAGS);
1710 vapier 1.10 for (i = 0; long_opts[i].name; ++i)
1711 vapier 1.27 if (long_opts[i].has_arg == no_argument)
1712 vapier 1.157 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1713 vapier 1.27 long_opts[i].name, opts_help[i]);
1714     else
1715 solar 1.124 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1716 vapier 1.27 long_opts[i].name, opts_help[i]);
1717 solar 1.45
1718 vapier 1.173 puts("\nFor more information, see the scanelf(1) manpage");
1719 vapier 1.10 exit(status);
1720 solar 1.1 }
1721    
1722     /* parse command line arguments and preform needed actions */
1723 vapier 1.165 #define do_pax_state(option, flag) \
1724     if (islower(option)) { \
1725     flags &= ~PF_##flag; \
1726     flags |= PF_NO##flag; \
1727     } else { \
1728     flags &= ~PF_NO##flag; \
1729     flags |= PF_##flag; \
1730     }
1731 solar 1.164 static int parseargs(int argc, char *argv[])
1732 vapier 1.10 {
1733 vapier 1.48 int i;
1734 vapier 1.133 const char *from_file = NULL;
1735 solar 1.164 int ret = 0;
1736 vapier 1.10
1737     opterr = 0;
1738 vapier 1.48 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1739     switch (i) {
1740 vapier 1.10
1741 vapier 1.39 case 'V':
1742 vapier 1.80 printf("pax-utils-%s: %s compiled %s\n%s\n"
1743     "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
1744     VERSION, __FILE__, __DATE__, rcsid, argv0);
1745 vapier 1.10 exit(EXIT_SUCCESS);
1746     break;
1747     case 'h': usage(EXIT_SUCCESS); break;
1748 solar 1.45 case 'f':
1749 vapier 1.100 if (from_file) warn("You prob don't want to specify -f twice");
1750     from_file = optarg;
1751 solar 1.45 break;
1752 solar 1.119 case 'E':
1753     strncpy(match_etypes, optarg, sizeof(match_etypes));
1754     break;
1755 solar 1.120 case 'M':
1756     match_bits = atoi(optarg);
1757 solar 1.182 if (match_bits == 0) {
1758     if (strcmp(optarg, "ELFCLASS32") == 0)
1759     match_bits = 32;
1760     if (strcmp(optarg, "ELFCLASS64") == 0)
1761     match_bits = 64;
1762     }
1763 solar 1.120 break;
1764 solar 1.180 case 'O':
1765 vapier 1.205 if (sscanf(optarg, "%o", &match_perms) == -1)
1766 solar 1.180 match_bits = 0;
1767     break;
1768 vapier 1.24 case 'o': {
1769 vapier 1.146 if (freopen(optarg, "w", stdout) == NULL)
1770 vapier 1.24 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1771 solar 1.21 break;
1772     }
1773 solar 1.124 case 'k':
1774 vapier 1.126 if (find_section) warn("You prob don't want to specify -k twice");
1775 solar 1.124 find_section = optarg;
1776     break;
1777 vapier 1.39 case 's': {
1778 vapier 1.93 if (find_sym) warn("You prob don't want to specify -s twice");
1779     find_sym = optarg;
1780 vapier 1.39 break;
1781     }
1782 vapier 1.72 case 'N': {
1783 vapier 1.93 if (find_lib) warn("You prob don't want to specify -N twice");
1784     find_lib = optarg;
1785 vapier 1.72 break;
1786     }
1787 vapier 1.39
1788     case 'F': {
1789 vapier 1.93 if (out_format) warn("You prob don't want to specify -F twice");
1790     out_format = optarg;
1791 vapier 1.39 break;
1792     }
1793 solar 1.127 case 'z': {
1794 solar 1.129 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1795 solar 1.127 size_t x;
1796 vapier 1.27
1797 vapier 1.186 for (x = 0; x < strlen(optarg); x++) {
1798     switch (optarg[x]) {
1799 solar 1.127 case 'p':
1800     case 'P':
1801 vapier 1.165 do_pax_state(optarg[x], PAGEEXEC);
1802 solar 1.127 break;
1803     case 's':
1804     case 'S':
1805 vapier 1.165 do_pax_state(optarg[x], SEGMEXEC);
1806 solar 1.127 break;
1807     case 'm':
1808     case 'M':
1809 vapier 1.165 do_pax_state(optarg[x], MPROTECT);
1810 solar 1.127 break;
1811     case 'e':
1812     case 'E':
1813 vapier 1.165 do_pax_state(optarg[x], EMUTRAMP);
1814 solar 1.127 break;
1815     case 'r':
1816     case 'R':
1817 vapier 1.165 do_pax_state(optarg[x], RANDMMAP);
1818 solar 1.127 break;
1819     case 'x':
1820     case 'X':
1821 vapier 1.165 do_pax_state(optarg[x], RANDEXEC);
1822 solar 1.127 break;
1823     default:
1824     break;
1825     }
1826     }
1827     if (!(((flags & PF_PAGEEXEC) && (flags & PF_NOPAGEEXEC)) ||
1828     ((flags & PF_SEGMEXEC) && (flags & PF_NOSEGMEXEC)) ||
1829     ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)) ||
1830     ((flags & PF_RANDEXEC) && (flags & PF_NORANDEXEC)) ||
1831     ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1832     ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1833     setpax = flags;
1834     break;
1835     }
1836 solar 1.190 case 'Z': show_size = 1; break;
1837 solar 1.176 case 'g': g_match = 1; break;
1838 vapier 1.102 case 'L': use_ldcache = 1; break;
1839 vapier 1.37 case 'y': scan_symlink = 0; break;
1840 vapier 1.105 case 'A': scan_archives = 1; break;
1841 solar 1.16 case 'B': show_banner = 0; break;
1842 vapier 1.10 case 'l': scan_ldpath = 1; break;
1843     case 'p': scan_envpath = 1; break;
1844     case 'R': dir_recurse = 1; break;
1845 vapier 1.14 case 'm': dir_crossmount = 0; break;
1846 vapier 1.101 case 'X': ++fix_elf; break;
1847 vapier 1.10 case 'x': show_pax = 1; break;
1848 solar 1.73 case 'e': show_phdr = 1; break;
1849 vapier 1.10 case 't': show_textrel = 1; break;
1850     case 'r': show_rpath = 1; break;
1851 vapier 1.32 case 'n': show_needed = 1; break;
1852 vapier 1.38 case 'i': show_interp = 1; break;
1853 vapier 1.49 case 'b': show_bind = 1; break;
1854 vapier 1.84 case 'S': show_soname = 1; break;
1855 vapier 1.76 case 'T': show_textrels = 1; break;
1856 vapier 1.10 case 'q': be_quiet = 1; break;
1857 vapier 1.14 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1858 solar 1.183 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1859 solar 1.181 case 'D': show_endian = 1; break;
1860 solar 1.191 case 'I': show_osabi = 1; break;
1861     case 'Y': show_eabi = 1; break;
1862 vapier 1.10 case ':':
1863 vapier 1.113 err("Option '%c' is missing parameter", optopt);
1864 vapier 1.10 case '?':
1865 solar 1.119 err("Unknown option '%c' or argument missing", optopt);
1866 vapier 1.10 default:
1867 vapier 1.113 err("Unhandled option '%c'; please report this", i);
1868 vapier 1.10 }
1869     }
1870 solar 1.170 if (show_textrels && be_verbose) {
1871     if (which("objdump") != NULL)
1872     has_objdump = 1;
1873     }
1874 vapier 1.39 /* let the format option override all other options */
1875     if (out_format) {
1876 solar 1.73 show_pax = show_phdr = show_textrel = show_rpath = \
1877 vapier 1.84 show_needed = show_interp = show_bind = show_soname = \
1878 solar 1.191 show_textrels = show_perms = show_endian = show_size = \
1879     show_osabi = show_eabi = 0;
1880 vapier 1.48 for (i = 0; out_format[i]; ++i) {
1881 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
1882 vapier 1.39
1883 vapier 1.48 switch (out_format[++i]) {
1884 solar 1.132 case '+': break;
1885 vapier 1.39 case '%': break;
1886 vapier 1.70 case '#': break;
1887 vapier 1.39 case 'F': break;
1888 vapier 1.66 case 'p': break;
1889     case 'f': break;
1890 solar 1.124 case 'k': break;
1891 vapier 1.39 case 's': break;
1892 vapier 1.72 case 'N': break;
1893 vapier 1.41 case 'o': break;
1894 vapier 1.166 case 'a': break;
1895 vapier 1.171 case 'M': break;
1896 solar 1.190 case 'Z': show_size = 1; break;
1897 solar 1.181 case 'D': show_endian = 1; break;
1898 solar 1.191 case 'I': show_osabi = 1; break;
1899     case 'Y': show_eabi = 1; break;
1900 solar 1.180 case 'O': show_perms = 1; break;
1901 vapier 1.39 case 'x': show_pax = 1; break;
1902 solar 1.73 case 'e': show_phdr = 1; break;
1903 vapier 1.39 case 't': show_textrel = 1; break;
1904     case 'r': show_rpath = 1; break;
1905     case 'n': show_needed = 1; break;
1906     case 'i': show_interp = 1; break;
1907 vapier 1.49 case 'b': show_bind = 1; break;
1908 vapier 1.84 case 'S': show_soname = 1; break;
1909 vapier 1.76 case 'T': show_textrels = 1; break;
1910 vapier 1.39 default:
1911 vapier 1.162 err("Invalid format specifier '%c' (byte %i)",
1912 vapier 1.48 out_format[i], i+1);
1913 vapier 1.39 }
1914     }
1915 vapier 1.41
1916     /* construct our default format */
1917     } else {
1918     size_t fmt_len = 30;
1919 vapier 1.186 out_format = xmalloc(sizeof(char) * fmt_len);
1920 vapier 1.194 *out_format = '\0';
1921 vapier 1.76 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1922     if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1923 solar 1.180 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
1924 solar 1.190 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
1925 solar 1.181 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
1926 solar 1.191 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
1927     if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1928 vapier 1.76 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1929     if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1930     if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1931     if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1932     if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1933     if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1934 vapier 1.84 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1935 vapier 1.76 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
1936     if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1937 solar 1.124 if (find_section) xstrcat(&out_format, "%k ", &fmt_len);
1938 vapier 1.76 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
1939     if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1940 vapier 1.39 }
1941 vapier 1.41 if (be_verbose > 2) printf("Format: %s\n", out_format);
1942 vapier 1.39
1943     /* now lets actually do the scanning */
1944 vapier 1.102 if (scan_ldpath || use_ldcache)
1945 vapier 1.148 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1946 vapier 1.10 if (scan_ldpath) scanelf_ldpath();
1947     if (scan_envpath) scanelf_envpath();
1948 solar 1.153 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1949 vapier 1.133 from_file = "-";
1950 solar 1.45 if (from_file) {
1951     scanelf_from_file(from_file);
1952     from_file = *argv;
1953     }
1954     if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1955 vapier 1.25 err("Nothing to scan !?");
1956 vapier 1.66 while (optind < argc) {
1957     search_path = argv[optind++];
1958 solar 1.164 ret = scanelf_dir(search_path);
1959 vapier 1.66 }
1960 vapier 1.27
1961 vapier 1.39 /* clean up */
1962 vapier 1.48 for (i = 0; ldpaths[i]; ++i)
1963     free(ldpaths[i]);
1964 solar 1.96
1965     if (ldcache != 0)
1966     munmap(ldcache, ldcache_size);
1967 solar 1.164 return ret;
1968 vapier 1.10 }
1969    
1970 vapier 1.150 static char **get_split_env(const char *envvar)
1971     {
1972 vapier 1.152 const char *delims = " \t\n";
1973 solar 1.143 char **envvals = NULL;
1974 vapier 1.152 char *env, *s;
1975 kevquinn 1.142 int nentry;
1976    
1977 solar 1.143 if ((env = getenv(envvar)) == NULL)
1978     return NULL;
1979 kevquinn 1.142
1980 solar 1.143 env = xstrdup(env);
1981     if (env == NULL)
1982     return NULL;
1983 kevquinn 1.142
1984 vapier 1.152 s = strtok(env, delims);
1985     if (s == NULL) {
1986     free(env);
1987     return NULL;
1988     }
1989    
1990 solar 1.143 nentry = 0;
1991 vapier 1.152 while (s != NULL) {
1992     ++nentry;
1993     envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
1994     envvals[nentry-1] = s;
1995     s = strtok(NULL, delims);
1996 kevquinn 1.142 }
1997 vapier 1.152 envvals[nentry] = NULL;
1998 kevquinn 1.142
1999 vapier 1.152 /* don't want to free(env) as it contains the memory that backs
2000     * the envvals array of strings */
2001 kevquinn 1.142 return envvals;
2002     }
2003 solar 1.181
2004 vapier 1.184 static void parseenv(void)
2005 vapier 1.150 {
2006     qa_textrels = get_split_env("QA_TEXTRELS");
2007     qa_execstack = get_split_env("QA_EXECSTACK");
2008     qa_wx_load = get_split_env("QA_WX_LOAD");
2009 vapier 1.41 }
2010 solar 1.163
2011 vapier 1.152 #ifdef __PAX_UTILS_CLEANUP
2012 vapier 1.184 static void cleanup(void)
2013 vapier 1.152 {
2014     free(out_format);
2015     free(qa_textrels);
2016     free(qa_execstack);
2017     free(qa_wx_load);
2018     }
2019     #endif
2020 vapier 1.41
2021 vapier 1.10 int main(int argc, char *argv[])
2022 solar 1.1 {
2023 solar 1.164 int ret;
2024 vapier 1.10 if (argc < 2)
2025     usage(EXIT_FAILURE);
2026 kevquinn 1.142 parseenv();
2027 solar 1.164 ret = parseargs(argc, argv);
2028 solar 1.21 fclose(stdout);
2029 vapier 1.152 #ifdef __PAX_UTILS_CLEANUP
2030     cleanup();
2031     warn("The calls to add/delete heap should be off:\n"
2032     "\t- 1 due to the out_buffer not being freed in scanelf_file()\n"
2033     "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
2034 solar 1.61 #endif
2035 solar 1.164 return ret;
2036 solar 1.1 }
2037 vapier 1.155
2038     /* Match filename against entries in matchlist, return TRUE
2039     * if the file is listed */
2040     static int file_matches_list(const char *filename, char **matchlist)
2041     {
2042     char **file;
2043     char *match;
2044     char buf[__PAX_UTILS_PATH_MAX];
2045    
2046     if (matchlist == NULL)
2047     return 0;
2048    
2049     for (file = matchlist; *file != NULL; file++) {
2050     if (search_path) {
2051     snprintf(buf, sizeof(buf), "%s%s", search_path, *file);
2052     match = buf;
2053     } else {
2054     match = *file;
2055     }
2056     if (fnmatch(match, filename, 0) == 0)
2057     return 1;
2058     }
2059     return 0;
2060     }

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