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Revision 1.196 - (hide annotations) (download) (as text)
Wed Oct 22 17:03:17 2008 UTC (5 years, 10 months ago) by flameeyes
Branch: MAIN
Changes since 1.195: +3 -3 lines
File MIME type: text/x-csrc
Fixing whitespace.

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 flameeyes 1.196 * $Header: /var/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.195 2008/10/22 15:20:21 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 flameeyes 1.196 static const char *rcsid = "$Id: scanelf.c,v 1.195 2008/10/22 15:20:21 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 vapier 1.39 static char *find_sym = NULL, *versioned_symname = 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 vapier 1.72 static char *scanelf_file_sym(elfobj *elf, char *found_sym)
981 vapier 1.39 {
982 vapier 1.44 unsigned long i;
983 vapier 1.95 char *ret;
984 vapier 1.39 void *symtab_void, *strtab_void;
985 vapier 1.38
986 vapier 1.41 if (!find_sym) return NULL;
987 vapier 1.95 ret = find_sym;
988 vapier 1.32
989 vapier 1.77 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
990 vapier 1.27
991 vapier 1.39 if (symtab_void && strtab_void) {
992 vapier 1.27 #define FIND_SYM(B) \
993     if (elf->elf_class == ELFCLASS ## B) { \
994     Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
995     Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
996     Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
997 vapier 1.115 unsigned long cnt = EGET(symtab->sh_entsize); \
998 vapier 1.27 char *symname; \
999 vapier 1.115 if (cnt) \
1000     cnt = EGET(symtab->sh_size) / cnt; \
1001 vapier 1.27 for (i = 0; i < cnt; ++i) { \
1002 flameeyes 1.196 if ((void*)sym > (void*)elf->data_end) { \
1003 flameeyes 1.195 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1004     goto break_out; \
1005     } \
1006 vapier 1.27 if (sym->st_name) { \
1007 vapier 1.134 /* make sure the symbol name is in acceptable memory range */ \
1008 vapier 1.27 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
1009 vapier 1.115 if ((void*)symname > (void*)elf->data_end) { \
1010     warnf("%s: corrupt ELF symbols", elf->filename); \
1011 vapier 1.134 ++sym; \
1012 vapier 1.111 continue; \
1013     } \
1014 vapier 1.134 /* debug display ... show all symbols and some extra info */ \
1015 solar 1.176 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \
1016 solar 1.177 printf("%s(%s) %5lX %15s %s %s\n", \
1017 vapier 1.39 ((*found_sym == 0) ? "\n\t" : "\t"), \
1018 vapier 1.76 elf->base_filename, \
1019 vapier 1.94 (unsigned long)sym->st_size, \
1020 vapier 1.95 get_elfstttype(sym->st_info), \
1021 solar 1.177 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1022 vapier 1.39 *found_sym = 1; \
1023 vapier 1.95 } else { \
1024 vapier 1.134 /* allow the user to specify a comma delimited list of symbols to search for */ \
1025 vapier 1.156 char *this_sym, *this_sym_ver, *next_sym; \
1026 vapier 1.134 this_sym = ret; \
1027 vapier 1.156 this_sym_ver = versioned_symname; \
1028 vapier 1.95 do { \
1029     next_sym = strchr(this_sym, ','); \
1030     if (next_sym == NULL) \
1031     next_sym = this_sym + strlen(this_sym); \
1032 vapier 1.134 /* do we want a defined symbol ? */ \
1033     if (*this_sym == '+') { \
1034 vapier 1.140 if (sym->st_shndx == SHN_UNDEF) \
1035 vapier 1.134 goto skip_this_sym##B; \
1036     ++this_sym; \
1037 vapier 1.156 ++this_sym_ver; \
1038 vapier 1.134 /* do we want an undefined symbol ? */ \
1039     } else if (*this_sym == '-') { \
1040 vapier 1.140 if (sym->st_shndx != SHN_UNDEF) \
1041 vapier 1.134 goto skip_this_sym##B; \
1042     ++this_sym; \
1043 vapier 1.156 ++this_sym_ver; \
1044 vapier 1.134 } \
1045     /* ok, lets compare the name now */ \
1046 vapier 1.95 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
1047 vapier 1.156 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
1048 solar 1.132 if (be_semi_verbose) { \
1049     char buf[126]; \
1050     snprintf(buf, sizeof(buf), "%lX %s %s", \
1051     (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1052     ret = buf; \
1053     } else \
1054     ret = this_sym; \
1055 vapier 1.95 (*found_sym)++; \
1056     goto break_out; \
1057     } \
1058 vapier 1.134 skip_this_sym##B: this_sym = next_sym + 1; \
1059 vapier 1.95 } while (*next_sym != '\0'); \
1060     } \
1061 vapier 1.27 } \
1062     ++sym; \
1063     } }
1064     FIND_SYM(32)
1065     FIND_SYM(64)
1066 vapier 1.39 }
1067 vapier 1.70
1068 vapier 1.95 break_out:
1069 solar 1.127 if (be_wewy_wewy_quiet) return NULL;
1070 vapier 1.70
1071 vapier 1.41 if (*find_sym != '*' && *found_sym)
1072 vapier 1.95 return ret;
1073 vapier 1.41 if (be_quiet)
1074     return NULL;
1075     else
1076 solar 1.68 return (char *)" - ";
1077 vapier 1.39 }
1078 solar 1.119
1079 solar 1.124 static char *scanelf_file_sections(elfobj *elf, char *found_section)
1080     {
1081     if (!find_section)
1082     return NULL;
1083    
1084     #define FIND_SECTION(B) \
1085     if (elf->elf_class == ELFCLASS ## B) { \
1086 solar 1.136 int invert; \
1087 solar 1.124 Elf ## B ## _Shdr *section; \
1088 solar 1.136 invert = (*find_section == '!' ? 1 : 0); \
1089     section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \
1090     if ((section == NULL && invert) || (section != NULL && !invert)) \
1091 solar 1.124 *found_section = 1; \
1092     }
1093     FIND_SECTION(32)
1094     FIND_SECTION(64)
1095    
1096 vapier 1.138 if (be_wewy_wewy_quiet)
1097     return NULL;
1098 solar 1.124
1099     if (*found_section)
1100     return find_section;
1101    
1102     if (be_quiet)
1103     return NULL;
1104     else
1105     return (char *)" - ";
1106     }
1107    
1108 vapier 1.39 /* scan an elf file and show all the fun stuff */
1109 solar 1.57 #define prints(str) write(fileno(stdout), str, strlen(str))
1110 vapier 1.106 static int scanelf_elfobj(elfobj *elf)
1111 vapier 1.39 {
1112 vapier 1.44 unsigned long i;
1113 vapier 1.162 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1114     found_rpath, found_needed, found_interp, found_bind, found_soname,
1115 solar 1.124 found_sym, found_lib, found_file, found_textrels, found_section;
1116 vapier 1.41 static char *out_buffer = NULL;
1117     static size_t out_len;
1118 vapier 1.39
1119 vapier 1.76 found_pax = found_phdr = found_relro = found_load = found_textrel = \
1120 vapier 1.84 found_rpath = found_needed = found_interp = found_bind = found_soname = \
1121 solar 1.124 found_sym = found_lib = found_file = found_textrels = found_section = 0;
1122 vapier 1.39
1123 vapier 1.114 if (be_verbose > 2)
1124 vapier 1.106 printf("%s: scanning file {%s,%s}\n", elf->filename,
1125 vapier 1.69 get_elfeitype(EI_CLASS, elf->elf_class),
1126     get_elfeitype(EI_DATA, elf->data[EI_DATA]));
1127 vapier 1.114 else if (be_verbose > 1)
1128 vapier 1.106 printf("%s: scanning file\n", elf->filename);
1129 vapier 1.39
1130 vapier 1.41 /* init output buffer */
1131     if (!out_buffer) {
1132     out_len = sizeof(char) * 80;
1133 vapier 1.186 out_buffer = xmalloc(out_len);
1134 vapier 1.41 }
1135     *out_buffer = '\0';
1136    
1137 vapier 1.39 /* show the header */
1138     if (!be_quiet && show_banner) {
1139 vapier 1.49 for (i = 0; out_format[i]; ++i) {
1140 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
1141 vapier 1.41
1142     switch (out_format[++i]) {
1143 solar 1.132 case '+': break;
1144 vapier 1.41 case '%': break;
1145 vapier 1.70 case '#': break;
1146 vapier 1.66 case 'F':
1147     case 'p':
1148     case 'f': prints("FILE "); found_file = 1; break;
1149 vapier 1.41 case 'o': prints(" TYPE "); break;
1150     case 'x': prints(" PAX "); break;
1151 vapier 1.71 case 'e': prints("STK/REL/PTL "); break;
1152 vapier 1.41 case 't': prints("TEXTREL "); break;
1153     case 'r': prints("RPATH "); break;
1154 vapier 1.171 case 'M': prints("CLASS "); break;
1155 vapier 1.41 case 'n': prints("NEEDED "); break;
1156     case 'i': prints("INTERP "); break;
1157 vapier 1.49 case 'b': prints("BIND "); break;
1158 solar 1.190 case 'Z': prints("SIZE "); break;
1159 vapier 1.84 case 'S': prints("SONAME "); break;
1160 vapier 1.41 case 's': prints("SYM "); break;
1161 vapier 1.72 case 'N': prints("LIB "); break;
1162 vapier 1.76 case 'T': prints("TEXTRELS "); break;
1163 vapier 1.126 case 'k': prints("SECTION "); break;
1164 vapier 1.166 case 'a': prints("ARCH "); break;
1165 solar 1.191 case 'I': prints("OSABI "); break;
1166     case 'Y': prints("EABI "); break;
1167 solar 1.180 case 'O': prints("PERM "); break;
1168 solar 1.181 case 'D': prints("ENDIAN "); break;
1169 vapier 1.76 default: warnf("'%c' has no title ?", out_format[i]);
1170 vapier 1.39 }
1171 vapier 1.27 }
1172 vapier 1.49 if (!found_file) prints("FILE ");
1173 vapier 1.41 prints("\n");
1174 vapier 1.49 found_file = 0;
1175 vapier 1.39 show_banner = 0;
1176     }
1177    
1178     /* dump all the good stuff */
1179 vapier 1.49 for (i = 0; out_format[i]; ++i) {
1180 vapier 1.41 const char *out;
1181 vapier 1.66 const char *tmp;
1182 solar 1.190 static char ubuf[sizeof(unsigned long)*2];
1183 vapier 1.70 if (!IS_MODIFIER(out_format[i])) {
1184 vapier 1.41 xchrcat(&out_buffer, out_format[i], &out_len);
1185     continue;
1186     }
1187 vapier 1.39
1188 vapier 1.41 out = NULL;
1189 solar 1.127 be_wewy_wewy_quiet = (out_format[i] == '#');
1190 solar 1.132 be_semi_verbose = (out_format[i] == '+');
1191 vapier 1.41 switch (out_format[++i]) {
1192 solar 1.132 case '+':
1193 vapier 1.70 case '%':
1194     case '#':
1195     xchrcat(&out_buffer, out_format[i], &out_len); break;
1196     case 'F':
1197 vapier 1.76 found_file = 1;
1198 solar 1.127 if (be_wewy_wewy_quiet) break;
1199 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
1200 vapier 1.70 break;
1201 vapier 1.66 case 'p':
1202 vapier 1.76 found_file = 1;
1203 solar 1.127 if (be_wewy_wewy_quiet) break;
1204 vapier 1.106 tmp = elf->filename;
1205 vapier 1.66 if (search_path) {
1206     ssize_t len_search = strlen(search_path);
1207 vapier 1.106 ssize_t len_file = strlen(elf->filename);
1208     if (!strncmp(elf->filename, search_path, len_search) && \
1209 vapier 1.66 len_file > len_search)
1210     tmp += len_search;
1211     if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
1212     }
1213     xstrcat(&out_buffer, tmp, &out_len);
1214     break;
1215     case 'f':
1216 vapier 1.76 found_file = 1;
1217 solar 1.127 if (be_wewy_wewy_quiet) break;
1218 vapier 1.106 tmp = strrchr(elf->filename, '/');
1219     tmp = (tmp == NULL ? elf->filename : tmp+1);
1220 vapier 1.66 xstrcat(&out_buffer, tmp, &out_len);
1221     break;
1222 vapier 1.41 case 'o': out = get_elfetype(elf); break;
1223     case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1224 solar 1.73 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
1225 vapier 1.41 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1226 vapier 1.79 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
1227 vapier 1.41 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1228 vapier 1.171 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1229 solar 1.181 case 'D': out = get_endian(elf); break;
1230 solar 1.180 case 'O': out = getstr_perms(elf->filename); break;
1231 vapier 1.72 case 'n':
1232     case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
1233 vapier 1.41 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1234 vapier 1.49 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1235 vapier 1.84 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1236 vapier 1.72 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1237 solar 1.124 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1238 vapier 1.166 case 'a': out = get_elfemtype(elf); break;
1239 solar 1.191 case 'I': out = get_elfosabi(elf); break;
1240     case 'Y': out = get_elf_eabi(elf); break;
1241 vapier 1.193 case 'Z': snprintf(ubuf, sizeof(ubuf), "%lu", (unsigned long)elf->len); out = ubuf; break;;
1242 vapier 1.76 default: warnf("'%c' has no scan code?", out_format[i]);
1243 vapier 1.29 }
1244 vapier 1.95 if (out) {
1245     /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1246     if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1247     xstrncat(&out_buffer, out, &out_len, (tmp-out));
1248     else
1249     xstrcat(&out_buffer, out, &out_len);
1250     }
1251 vapier 1.39 }
1252    
1253 vapier 1.54 #define FOUND_SOMETHING() \
1254 solar 1.73 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1255 vapier 1.76 found_rpath || found_needed || found_interp || found_bind || \
1256 solar 1.124 found_soname || found_sym || found_lib || found_textrels || found_section )
1257 vapier 1.54
1258     if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
1259     xchrcat(&out_buffer, ' ', &out_len);
1260 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
1261 vapier 1.27 }
1262 vapier 1.79 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
1263 vapier 1.41 puts(out_buffer);
1264 vapier 1.79 fflush(stdout);
1265     }
1266 vapier 1.10
1267 vapier 1.105 return 0;
1268     }
1269    
1270 vapier 1.106 /* scan a single elf */
1271     static int scanelf_elf(const char *filename, int fd, size_t len)
1272     {
1273 solar 1.120 int ret = 1;
1274 vapier 1.106 elfobj *elf;
1275    
1276     /* verify this is real ELF */
1277     if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1278     if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1279 solar 1.120 return ret;
1280     }
1281     switch (match_bits) {
1282     case 32:
1283     if (elf->elf_class != ELFCLASS32)
1284     goto label_done;
1285     break;
1286     case 64:
1287     if (elf->elf_class != ELFCLASS64)
1288     goto label_done;
1289     break;
1290     default: break;
1291 vapier 1.106 }
1292 solar 1.119 if (strlen(match_etypes)) {
1293     char sbuf[126];
1294     strncpy(sbuf, match_etypes, sizeof(sbuf));
1295     if (strchr(match_etypes, ',') != NULL) {
1296     char *p;
1297 vapier 1.186 while ((p = strrchr(sbuf, ',')) != NULL) {
1298 solar 1.119 *p = 0;
1299 solar 1.129 if (etype_lookup(p+1) == get_etype(elf))
1300 solar 1.119 goto label_ret;
1301     }
1302     }
1303 solar 1.129 if (etype_lookup(sbuf) != get_etype(elf))
1304 solar 1.119 goto label_done;
1305     }
1306    
1307     label_ret:
1308 vapier 1.106 ret = scanelf_elfobj(elf);
1309 solar 1.119
1310     label_done:
1311 vapier 1.106 unreadelf(elf);
1312     return ret;
1313     }
1314 solar 1.119
1315 vapier 1.105 /* scan an archive of elfs */
1316 vapier 1.106 static int scanelf_archive(const char *filename, int fd, size_t len)
1317 vapier 1.105 {
1318 vapier 1.106 archive_handle *ar;
1319 vapier 1.105 archive_member *m;
1320 vapier 1.106 char *ar_buffer;
1321     elfobj *elf;
1322    
1323     ar = ar_open_fd(filename, fd);
1324     if (ar == NULL)
1325     return 1;
1326    
1327     ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1328     while ((m=ar_next(ar)) != NULL) {
1329     elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1330     if (elf) {
1331     scanelf_elfobj(elf);
1332     unreadelf(elf);
1333     }
1334     }
1335     munmap(ar_buffer, len);
1336    
1337 vapier 1.105 return 0;
1338     }
1339     /* scan a file which may be an elf or an archive or some other magical beast */
1340 solar 1.164 static int scanelf_file(const char *filename, const struct stat *st_cache)
1341 vapier 1.105 {
1342 vapier 1.161 const struct stat *st = st_cache;
1343     struct stat symlink_st;
1344 vapier 1.106 int fd;
1345 vapier 1.105
1346     /* always handle regular files and handle symlinked files if no -y */
1347 vapier 1.161 if (S_ISLNK(st->st_mode)) {
1348 solar 1.164 if (!scan_symlink) return 1;
1349 vapier 1.161 stat(filename, &symlink_st);
1350     st = &symlink_st;
1351 vapier 1.105 }
1352 vapier 1.161
1353     if (!S_ISREG(st->st_mode)) {
1354 vapier 1.105 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1355 solar 1.164 return 1;
1356 vapier 1.105 }
1357    
1358 solar 1.180 if (match_perms) {
1359     if ((st->st_mode | match_perms) != st->st_mode)
1360     return 1;
1361     }
1362 vapier 1.106 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1363 solar 1.164 return 1;
1364 vapier 1.106
1365 vapier 1.161 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1366 vapier 1.105 /* if it isn't an ELF, maybe it's an .a archive */
1367 vapier 1.161 scanelf_archive(filename, fd, st->st_size);
1368 vapier 1.106
1369     close(fd);
1370 solar 1.164 return 0;
1371 solar 1.6 }
1372    
1373 solar 1.1 /* scan a directory for ET_EXEC files and print when we find one */
1374 solar 1.164 static int scanelf_dir(const char *path)
1375 solar 1.1 {
1376 vapier 1.10 register DIR *dir;
1377     register struct dirent *dentry;
1378 vapier 1.14 struct stat st_top, st;
1379 vapier 1.104 char buf[__PAX_UTILS_PATH_MAX];
1380 vapier 1.32 size_t pathlen = 0, len = 0;
1381 solar 1.164 int ret = 0;
1382 vapier 1.10
1383     /* make sure path exists */
1384 vapier 1.39 if (lstat(path, &st_top) == -1) {
1385     if (be_verbose > 2) printf("%s: does not exist\n", path);
1386 solar 1.164 return 1;
1387 vapier 1.39 }
1388 solar 1.11
1389 vapier 1.10 /* ok, if it isn't a directory, assume we can open it */
1390 vapier 1.14 if (!S_ISDIR(st_top.st_mode)) {
1391 solar 1.164 return scanelf_file(path, &st_top);
1392 vapier 1.10 }
1393    
1394     /* now scan the dir looking for fun stuff */
1395     if ((dir = opendir(path)) == NULL) {
1396     warnf("could not opendir %s: %s", path, strerror(errno));
1397 solar 1.164 return 1;
1398 vapier 1.10 }
1399 vapier 1.114 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1400 solar 1.11
1401 vapier 1.32 pathlen = strlen(path);
1402 vapier 1.10 while ((dentry = readdir(dir))) {
1403     if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
1404     continue;
1405 vapier 1.32 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
1406     if (len >= sizeof(buf)) {
1407 vapier 1.76 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1408     (unsigned long)len, (unsigned long)sizeof(buf));
1409 vapier 1.32 continue;
1410     }
1411 solar 1.143 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
1412 solar 1.20 if (lstat(buf, &st) != -1) {
1413 vapier 1.10 if (S_ISREG(st.st_mode))
1414 solar 1.164 ret = scanelf_file(buf, &st);
1415 vapier 1.10 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1416 vapier 1.14 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1417 solar 1.164 ret = scanelf_dir(buf);
1418 vapier 1.10 }
1419     }
1420     }
1421     closedir(dir);
1422 solar 1.164 return ret;
1423 solar 1.1 }
1424    
1425 vapier 1.133 static int scanelf_from_file(const char *filename)
1426 vapier 1.47 {
1427 solar 1.45 FILE *fp = NULL;
1428     char *p;
1429 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1430 solar 1.164 int ret = 0;
1431 solar 1.45
1432 solar 1.132 if (strcmp(filename, "-") == 0)
1433 solar 1.45 fp = stdin;
1434     else if ((fp = fopen(filename, "r")) == NULL)
1435     return 1;
1436    
1437 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1438 solar 1.45 if ((p = strchr(path, '\n')) != NULL)
1439     *p = 0;
1440 vapier 1.66 search_path = path;
1441 solar 1.164 ret = scanelf_dir(path);
1442 solar 1.45 }
1443     if (fp != stdin)
1444     fclose(fp);
1445 solar 1.164 return ret;
1446 solar 1.45 }
1447    
1448 solar 1.154 #if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1449 vapier 1.148
1450     static int load_ld_cache_config(int i, const char *fname)
1451 vapier 1.48 {
1452     FILE *fp = NULL;
1453     char *p;
1454 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1455 vapier 1.48
1456 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1457 solar 1.123 return i;
1458    
1459     if ((fp = fopen(fname, "r")) == NULL)
1460     return i;
1461 vapier 1.48
1462 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1463 vapier 1.48 if ((p = strrchr(path, '\r')) != NULL)
1464     *p = 0;
1465     if ((p = strchr(path, '\n')) != NULL)
1466     *p = 0;
1467 solar 1.154 #ifdef __linux__
1468 vapier 1.186 /* recursive includes of the same file will make this segfault. */
1469 solar 1.129 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1470 solar 1.123 glob64_t gl;
1471     size_t x;
1472     char gpath[__PAX_UTILS_PATH_MAX];
1473    
1474 solar 1.129 memset(gpath, 0, sizeof(gpath));
1475 solar 1.123
1476     if (path[8] != '/')
1477 solar 1.129 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]);
1478 solar 1.123 else
1479 solar 1.129 strncpy(gpath, &path[8], sizeof(gpath));
1480 solar 1.123
1481     if ((glob64(gpath, 0, NULL, &gl)) == 0) {
1482     for (x = 0; x < gl.gl_pathc; ++x) {
1483     /* try to avoid direct loops */
1484     if (strcmp(gl.gl_pathv[x], fname) == 0)
1485     continue;
1486 vapier 1.148 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1487 vapier 1.149 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1488 solar 1.123 globfree64(&gl);
1489     return i;
1490     }
1491     }
1492     globfree64 (&gl);
1493     continue;
1494 solar 1.160 }
1495 solar 1.123 }
1496 solar 1.154 #endif
1497 solar 1.123 if (*path != '/')
1498     continue;
1499 vapier 1.48
1500     ldpaths[i++] = xstrdup(path);
1501    
1502 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1503 vapier 1.48 break;
1504     }
1505     ldpaths[i] = NULL;
1506    
1507     fclose(fp);
1508 solar 1.123 return i;
1509 vapier 1.48 }
1510 flameeyes 1.141
1511 vapier 1.148 #elif defined(__FreeBSD__) || (__DragonFly__)
1512    
1513     static int load_ld_cache_config(int i, const char *fname)
1514 flameeyes 1.141 {
1515     FILE *fp = NULL;
1516     char *b = NULL, *p;
1517     struct elfhints_hdr hdr;
1518 vapier 1.152
1519 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1520 flameeyes 1.141 return i;
1521    
1522     if ((fp = fopen(fname, "r")) == NULL)
1523     return i;
1524    
1525 vapier 1.152 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1526     hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1527     fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1528     {
1529 flameeyes 1.141 fclose(fp);
1530     return i;
1531     }
1532 vapier 1.152
1533 vapier 1.186 b = xmalloc(hdr.dirlistlen + 1);
1534 vapier 1.152 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1535 flameeyes 1.141 fclose(fp);
1536     free(b);
1537     return i;
1538     }
1539 vapier 1.152
1540     while ((p = strsep(&b, ":"))) {
1541     if (*p == '\0') continue;
1542 flameeyes 1.141 ldpaths[i++] = xstrdup(p);
1543 vapier 1.152
1544 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1545 flameeyes 1.141 break;
1546     }
1547     ldpaths[i] = NULL;
1548 vapier 1.157
1549 flameeyes 1.141 free(b);
1550     fclose(fp);
1551     return i;
1552     }
1553 vapier 1.148
1554     #else
1555 vapier 1.192 #ifdef __ELF__
1556 vapier 1.148 #warning Cache config support not implemented for your target
1557 vapier 1.192 #endif
1558 vapier 1.148 static int load_ld_cache_config(int i, const char *fname)
1559     {
1560     memset(ldpaths, 0x00, sizeof(ldpaths));
1561 vapier 1.192 return 0;
1562 vapier 1.148 }
1563 flameeyes 1.141 #endif
1564 vapier 1.48
1565 vapier 1.10 /* scan /etc/ld.so.conf for paths */
1566 vapier 1.184 static void scanelf_ldpath(void)
1567 vapier 1.10 {
1568 vapier 1.17 char scan_l, scan_ul, scan_ull;
1569 vapier 1.48 int i = 0;
1570 vapier 1.10
1571 vapier 1.48 if (!ldpaths[0])
1572     err("Unable to load any paths from ld.so.conf");
1573 vapier 1.10
1574 vapier 1.17 scan_l = scan_ul = scan_ull = 0;
1575    
1576 vapier 1.48 while (ldpaths[i]) {
1577     if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
1578     if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
1579     if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
1580     scanelf_dir(ldpaths[i]);
1581     ++i;
1582     }
1583 vapier 1.10
1584 vapier 1.17 if (!scan_l) scanelf_dir("/lib");
1585     if (!scan_ul) scanelf_dir("/usr/lib");
1586     if (!scan_ull) scanelf_dir("/usr/local/lib");
1587 vapier 1.10 }
1588 solar 1.1
1589 vapier 1.10 /* scan env PATH for paths */
1590 vapier 1.184 static void scanelf_envpath(void)
1591 solar 1.1 {
1592 solar 1.34 char *path, *p;
1593 vapier 1.10
1594     path = getenv("PATH");
1595     if (!path)
1596     err("PATH is not set in your env !");
1597 vapier 1.41 path = xstrdup(path);
1598 vapier 1.10
1599     while ((p = strrchr(path, ':')) != NULL) {
1600     scanelf_dir(p + 1);
1601     *p = 0;
1602     }
1603 vapier 1.17
1604 solar 1.34 free(path);
1605 solar 1.1 }
1606    
1607 solar 1.191 /* usage / invocation handling functions */ /* Free Flags: c d j u w C G H J K P Q U W */
1608     #define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZBhV"
1609 vapier 1.27 #define a_argument required_argument
1610 vapier 1.10 static struct option const long_opts[] = {
1611     {"path", no_argument, NULL, 'p'},
1612     {"ldpath", no_argument, NULL, 'l'},
1613     {"recursive", no_argument, NULL, 'R'},
1614 vapier 1.14 {"mount", no_argument, NULL, 'm'},
1615 vapier 1.37 {"symlink", no_argument, NULL, 'y'},
1616 vapier 1.105 {"archives", no_argument, NULL, 'A'},
1617     {"ldcache", no_argument, NULL, 'L'},
1618 vapier 1.101 {"fix", no_argument, NULL, 'X'},
1619 solar 1.127 {"setpax", a_argument, NULL, 'z'},
1620 vapier 1.10 {"pax", no_argument, NULL, 'x'},
1621 solar 1.16 {"header", no_argument, NULL, 'e'},
1622 vapier 1.10 {"textrel", no_argument, NULL, 't'},
1623     {"rpath", no_argument, NULL, 'r'},
1624 vapier 1.32 {"needed", no_argument, NULL, 'n'},
1625 vapier 1.38 {"interp", no_argument, NULL, 'i'},
1626 vapier 1.49 {"bind", no_argument, NULL, 'b'},
1627 vapier 1.84 {"soname", no_argument, NULL, 'S'},
1628 vapier 1.76 {"symbol", a_argument, NULL, 's'},
1629 solar 1.124 {"section", a_argument, NULL, 'k'},
1630 vapier 1.76 {"lib", a_argument, NULL, 'N'},
1631 solar 1.86 {"gmatch", no_argument, NULL, 'g'},
1632 vapier 1.76 {"textrels", no_argument, NULL, 'T'},
1633 solar 1.119 {"etype", a_argument, NULL, 'E'},
1634 solar 1.120 {"bits", a_argument, NULL, 'M'},
1635 solar 1.181 {"endian", no_argument, NULL, 'D'},
1636 solar 1.191 {"osabi", no_argument, NULL, 'I'},
1637     {"eabi", no_argument, NULL, 'Y'},
1638 solar 1.180 {"perms", a_argument, NULL, 'O'},
1639 solar 1.190 {"size", no_argument, NULL, 'Z'},
1640 vapier 1.10 {"all", no_argument, NULL, 'a'},
1641     {"quiet", no_argument, NULL, 'q'},
1642 vapier 1.14 {"verbose", no_argument, NULL, 'v'},
1643 vapier 1.76 {"format", a_argument, NULL, 'F'},
1644     {"from", a_argument, NULL, 'f'},
1645     {"file", a_argument, NULL, 'o'},
1646 solar 1.16 {"nobanner", no_argument, NULL, 'B'},
1647 vapier 1.10 {"help", no_argument, NULL, 'h'},
1648     {"version", no_argument, NULL, 'V'},
1649     {NULL, no_argument, NULL, 0x0}
1650     };
1651 solar 1.57
1652 solar 1.68 static const char *opts_help[] = {
1653 vapier 1.10 "Scan all directories in PATH environment",
1654     "Scan all directories in /etc/ld.so.conf",
1655 vapier 1.14 "Scan directories recursively",
1656 vapier 1.37 "Don't recursively cross mount points",
1657 vapier 1.101 "Don't scan symlinks",
1658 vapier 1.105 "Scan archives (.a files)",
1659     "Utilize ld.so.cache information (use with -r/-n)",
1660 solar 1.127 "Try and 'fix' bad things (use with -r/-e)",
1661     "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
1662 vapier 1.10 "Print PaX markings",
1663 vapier 1.71 "Print GNU_STACK/PT_LOAD markings",
1664 vapier 1.10 "Print TEXTREL information",
1665     "Print RPATH information",
1666 vapier 1.32 "Print NEEDED information",
1667 vapier 1.38 "Print INTERP information",
1668 vapier 1.49 "Print BIND information",
1669 vapier 1.84 "Print SONAME information",
1670 vapier 1.27 "Find a specified symbol",
1671 solar 1.124 "Find a specified section",
1672 vapier 1.72 "Find a specified library",
1673 solar 1.86 "Use strncmp to match libraries. (use with -N)",
1674 vapier 1.76 "Locate cause of TEXTREL",
1675 solar 1.129 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1676 solar 1.120 "Print only ELF files matching numeric bits",
1677 solar 1.181 "Print Endianness",
1678 solar 1.191 "Print OSABI",
1679     "Print EABI (EM_ARM Only)",
1680 solar 1.180 "Print only ELF files matching octal permissions",
1681 solar 1.190 "Print ELF file size",
1682 vapier 1.82 "Print all scanned info (-x -e -t -r -b)\n",
1683 vapier 1.14 "Only output 'bad' things",
1684     "Be verbose (can be specified more than once)",
1685 vapier 1.39 "Use specified format for output",
1686 solar 1.45 "Read input stream from a filename",
1687 vapier 1.24 "Write output stream to a filename",
1688 vapier 1.14 "Don't display the header",
1689 vapier 1.10 "Print this help and exit",
1690     "Print version and exit",
1691     NULL
1692     };
1693    
1694     /* display usage and exit */
1695     static void usage(int status)
1696 solar 1.1 {
1697 vapier 1.44 unsigned long i;
1698 solar 1.52 printf("* Scan ELF binaries for stuff\n\n"
1699 vapier 1.105 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1700 solar 1.35 printf("Options: -[%s]\n", PARSE_FLAGS);
1701 vapier 1.10 for (i = 0; long_opts[i].name; ++i)
1702 vapier 1.27 if (long_opts[i].has_arg == no_argument)
1703 vapier 1.157 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1704 vapier 1.27 long_opts[i].name, opts_help[i]);
1705     else
1706 solar 1.124 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1707 vapier 1.27 long_opts[i].name, opts_help[i]);
1708 solar 1.45
1709 vapier 1.173 puts("\nFor more information, see the scanelf(1) manpage");
1710 vapier 1.10 exit(status);
1711 solar 1.1 }
1712    
1713     /* parse command line arguments and preform needed actions */
1714 vapier 1.165 #define do_pax_state(option, flag) \
1715     if (islower(option)) { \
1716     flags &= ~PF_##flag; \
1717     flags |= PF_NO##flag; \
1718     } else { \
1719     flags &= ~PF_NO##flag; \
1720     flags |= PF_##flag; \
1721     }
1722 solar 1.164 static int parseargs(int argc, char *argv[])
1723 vapier 1.10 {
1724 vapier 1.48 int i;
1725 vapier 1.133 const char *from_file = NULL;
1726 solar 1.164 int ret = 0;
1727 vapier 1.10
1728     opterr = 0;
1729 vapier 1.48 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1730     switch (i) {
1731 vapier 1.10
1732 vapier 1.39 case 'V':
1733 vapier 1.80 printf("pax-utils-%s: %s compiled %s\n%s\n"
1734     "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
1735     VERSION, __FILE__, __DATE__, rcsid, argv0);
1736 vapier 1.10 exit(EXIT_SUCCESS);
1737     break;
1738     case 'h': usage(EXIT_SUCCESS); break;
1739 solar 1.45 case 'f':
1740 vapier 1.100 if (from_file) warn("You prob don't want to specify -f twice");
1741     from_file = optarg;
1742 solar 1.45 break;
1743 solar 1.119 case 'E':
1744     strncpy(match_etypes, optarg, sizeof(match_etypes));
1745     break;
1746 solar 1.120 case 'M':
1747     match_bits = atoi(optarg);
1748 solar 1.182 if (match_bits == 0) {
1749     if (strcmp(optarg, "ELFCLASS32") == 0)
1750     match_bits = 32;
1751     if (strcmp(optarg, "ELFCLASS64") == 0)
1752     match_bits = 64;
1753     }
1754 solar 1.120 break;
1755 solar 1.180 case 'O':
1756     if (sscanf(optarg, "%o", &match_perms) == (-1))
1757     match_bits = 0;
1758     break;
1759 vapier 1.24 case 'o': {
1760 vapier 1.146 if (freopen(optarg, "w", stdout) == NULL)
1761 vapier 1.24 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1762 solar 1.21 break;
1763     }
1764 solar 1.124 case 'k':
1765 vapier 1.126 if (find_section) warn("You prob don't want to specify -k twice");
1766 solar 1.124 find_section = optarg;
1767     break;
1768 vapier 1.39 case 's': {
1769 vapier 1.93 if (find_sym) warn("You prob don't want to specify -s twice");
1770     find_sym = optarg;
1771 vapier 1.186 versioned_symname = xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1772 vapier 1.39 sprintf(versioned_symname, "%s@", find_sym);
1773     break;
1774     }
1775 vapier 1.72 case 'N': {
1776 vapier 1.93 if (find_lib) warn("You prob don't want to specify -N twice");
1777     find_lib = optarg;
1778 vapier 1.72 break;
1779     }
1780 vapier 1.39
1781     case 'F': {
1782 vapier 1.93 if (out_format) warn("You prob don't want to specify -F twice");
1783     out_format = optarg;
1784 vapier 1.39 break;
1785     }
1786 solar 1.127 case 'z': {
1787 solar 1.129 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1788 solar 1.127 size_t x;
1789 vapier 1.27
1790 vapier 1.186 for (x = 0; x < strlen(optarg); x++) {
1791     switch (optarg[x]) {
1792 solar 1.127 case 'p':
1793     case 'P':
1794 vapier 1.165 do_pax_state(optarg[x], PAGEEXEC);
1795 solar 1.127 break;
1796     case 's':
1797     case 'S':
1798 vapier 1.165 do_pax_state(optarg[x], SEGMEXEC);
1799 solar 1.127 break;
1800     case 'm':
1801     case 'M':
1802 vapier 1.165 do_pax_state(optarg[x], MPROTECT);
1803 solar 1.127 break;
1804     case 'e':
1805     case 'E':
1806 vapier 1.165 do_pax_state(optarg[x], EMUTRAMP);
1807 solar 1.127 break;
1808     case 'r':
1809     case 'R':
1810 vapier 1.165 do_pax_state(optarg[x], RANDMMAP);
1811 solar 1.127 break;
1812     case 'x':
1813     case 'X':
1814 vapier 1.165 do_pax_state(optarg[x], RANDEXEC);
1815 solar 1.127 break;
1816     default:
1817     break;
1818     }
1819     }
1820     if (!(((flags & PF_PAGEEXEC) && (flags & PF_NOPAGEEXEC)) ||
1821     ((flags & PF_SEGMEXEC) && (flags & PF_NOSEGMEXEC)) ||
1822     ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)) ||
1823     ((flags & PF_RANDEXEC) && (flags & PF_NORANDEXEC)) ||
1824     ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1825     ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1826     setpax = flags;
1827     break;
1828     }
1829 solar 1.190 case 'Z': show_size = 1; break;
1830 solar 1.176 case 'g': g_match = 1; break;
1831 vapier 1.102 case 'L': use_ldcache = 1; break;
1832 vapier 1.37 case 'y': scan_symlink = 0; break;
1833 vapier 1.105 case 'A': scan_archives = 1; break;
1834 solar 1.16 case 'B': show_banner = 0; break;
1835 vapier 1.10 case 'l': scan_ldpath = 1; break;
1836     case 'p': scan_envpath = 1; break;
1837     case 'R': dir_recurse = 1; break;
1838 vapier 1.14 case 'm': dir_crossmount = 0; break;
1839 vapier 1.101 case 'X': ++fix_elf; break;
1840 vapier 1.10 case 'x': show_pax = 1; break;
1841 solar 1.73 case 'e': show_phdr = 1; break;
1842 vapier 1.10 case 't': show_textrel = 1; break;
1843     case 'r': show_rpath = 1; break;
1844 vapier 1.32 case 'n': show_needed = 1; break;
1845 vapier 1.38 case 'i': show_interp = 1; break;
1846 vapier 1.49 case 'b': show_bind = 1; break;
1847 vapier 1.84 case 'S': show_soname = 1; break;
1848 vapier 1.76 case 'T': show_textrels = 1; break;
1849 vapier 1.10 case 'q': be_quiet = 1; break;
1850 vapier 1.14 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1851 solar 1.183 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1852 solar 1.181 case 'D': show_endian = 1; break;
1853 solar 1.191 case 'I': show_osabi = 1; break;
1854     case 'Y': show_eabi = 1; break;
1855 vapier 1.10 case ':':
1856 vapier 1.113 err("Option '%c' is missing parameter", optopt);
1857 vapier 1.10 case '?':
1858 solar 1.119 err("Unknown option '%c' or argument missing", optopt);
1859 vapier 1.10 default:
1860 vapier 1.113 err("Unhandled option '%c'; please report this", i);
1861 vapier 1.10 }
1862     }
1863 solar 1.170 if (show_textrels && be_verbose) {
1864     if (which("objdump") != NULL)
1865     has_objdump = 1;
1866     }
1867 vapier 1.39 /* let the format option override all other options */
1868     if (out_format) {
1869 solar 1.73 show_pax = show_phdr = show_textrel = show_rpath = \
1870 vapier 1.84 show_needed = show_interp = show_bind = show_soname = \
1871 solar 1.191 show_textrels = show_perms = show_endian = show_size = \
1872     show_osabi = show_eabi = 0;
1873 vapier 1.48 for (i = 0; out_format[i]; ++i) {
1874 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
1875 vapier 1.39
1876 vapier 1.48 switch (out_format[++i]) {
1877 solar 1.132 case '+': break;
1878 vapier 1.39 case '%': break;
1879 vapier 1.70 case '#': break;
1880 vapier 1.39 case 'F': break;
1881 vapier 1.66 case 'p': break;
1882     case 'f': break;
1883 solar 1.124 case 'k': break;
1884 vapier 1.39 case 's': break;
1885 vapier 1.72 case 'N': break;
1886 vapier 1.41 case 'o': break;
1887 vapier 1.166 case 'a': break;
1888 vapier 1.171 case 'M': break;
1889 solar 1.190 case 'Z': show_size = 1; break;
1890 solar 1.181 case 'D': show_endian = 1; break;
1891 solar 1.191 case 'I': show_osabi = 1; break;
1892     case 'Y': show_eabi = 1; break;
1893 solar 1.180 case 'O': show_perms = 1; break;
1894 vapier 1.39 case 'x': show_pax = 1; break;
1895 solar 1.73 case 'e': show_phdr = 1; break;
1896 vapier 1.39 case 't': show_textrel = 1; break;
1897     case 'r': show_rpath = 1; break;
1898     case 'n': show_needed = 1; break;
1899     case 'i': show_interp = 1; break;
1900 vapier 1.49 case 'b': show_bind = 1; break;
1901 vapier 1.84 case 'S': show_soname = 1; break;
1902 vapier 1.76 case 'T': show_textrels = 1; break;
1903 vapier 1.39 default:
1904 vapier 1.162 err("Invalid format specifier '%c' (byte %i)",
1905 vapier 1.48 out_format[i], i+1);
1906 vapier 1.39 }
1907     }
1908 vapier 1.41
1909     /* construct our default format */
1910     } else {
1911     size_t fmt_len = 30;
1912 vapier 1.186 out_format = xmalloc(sizeof(char) * fmt_len);
1913 vapier 1.194 *out_format = '\0';
1914 vapier 1.76 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1915     if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1916 solar 1.180 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
1917 solar 1.190 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
1918 solar 1.181 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
1919 solar 1.191 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
1920     if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1921 vapier 1.76 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1922     if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1923     if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1924     if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1925     if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1926     if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1927 vapier 1.84 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1928 vapier 1.76 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
1929     if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1930 solar 1.124 if (find_section) xstrcat(&out_format, "%k ", &fmt_len);
1931 vapier 1.76 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
1932     if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1933 vapier 1.39 }
1934 vapier 1.41 if (be_verbose > 2) printf("Format: %s\n", out_format);
1935 vapier 1.39
1936     /* now lets actually do the scanning */
1937 vapier 1.102 if (scan_ldpath || use_ldcache)
1938 vapier 1.148 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1939 vapier 1.10 if (scan_ldpath) scanelf_ldpath();
1940     if (scan_envpath) scanelf_envpath();
1941 solar 1.153 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1942 vapier 1.133 from_file = "-";
1943 solar 1.45 if (from_file) {
1944     scanelf_from_file(from_file);
1945     from_file = *argv;
1946     }
1947     if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1948 vapier 1.25 err("Nothing to scan !?");
1949 vapier 1.66 while (optind < argc) {
1950     search_path = argv[optind++];
1951 solar 1.164 ret = scanelf_dir(search_path);
1952 vapier 1.66 }
1953 vapier 1.27
1954 vapier 1.39 /* clean up */
1955 vapier 1.152 free(versioned_symname);
1956 vapier 1.48 for (i = 0; ldpaths[i]; ++i)
1957     free(ldpaths[i]);
1958 solar 1.96
1959     if (ldcache != 0)
1960     munmap(ldcache, ldcache_size);
1961 solar 1.164 return ret;
1962 vapier 1.10 }
1963    
1964 vapier 1.150 static char **get_split_env(const char *envvar)
1965     {
1966 vapier 1.152 const char *delims = " \t\n";
1967 solar 1.143 char **envvals = NULL;
1968 vapier 1.152 char *env, *s;
1969 kevquinn 1.142 int nentry;
1970    
1971 solar 1.143 if ((env = getenv(envvar)) == NULL)
1972     return NULL;
1973 kevquinn 1.142
1974 solar 1.143 env = xstrdup(env);
1975     if (env == NULL)
1976     return NULL;
1977 kevquinn 1.142
1978 vapier 1.152 s = strtok(env, delims);
1979     if (s == NULL) {
1980     free(env);
1981     return NULL;
1982     }
1983    
1984 solar 1.143 nentry = 0;
1985 vapier 1.152 while (s != NULL) {
1986     ++nentry;
1987     envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
1988     envvals[nentry-1] = s;
1989     s = strtok(NULL, delims);
1990 kevquinn 1.142 }
1991 vapier 1.152 envvals[nentry] = NULL;
1992 kevquinn 1.142
1993 vapier 1.152 /* don't want to free(env) as it contains the memory that backs
1994     * the envvals array of strings */
1995 kevquinn 1.142 return envvals;
1996     }
1997 solar 1.181
1998 vapier 1.184 static void parseenv(void)
1999 vapier 1.150 {
2000     qa_textrels = get_split_env("QA_TEXTRELS");
2001     qa_execstack = get_split_env("QA_EXECSTACK");
2002     qa_wx_load = get_split_env("QA_WX_LOAD");
2003 vapier 1.41 }
2004 solar 1.163
2005 vapier 1.152 #ifdef __PAX_UTILS_CLEANUP
2006 vapier 1.184 static void cleanup(void)
2007 vapier 1.152 {
2008     free(out_format);
2009     free(qa_textrels);
2010     free(qa_execstack);
2011     free(qa_wx_load);
2012     }
2013     #endif
2014 vapier 1.41
2015 vapier 1.10 int main(int argc, char *argv[])
2016 solar 1.1 {
2017 solar 1.164 int ret;
2018 vapier 1.10 if (argc < 2)
2019     usage(EXIT_FAILURE);
2020 kevquinn 1.142 parseenv();
2021 solar 1.164 ret = parseargs(argc, argv);
2022 solar 1.21 fclose(stdout);
2023 vapier 1.152 #ifdef __PAX_UTILS_CLEANUP
2024     cleanup();
2025     warn("The calls to add/delete heap should be off:\n"
2026     "\t- 1 due to the out_buffer not being freed in scanelf_file()\n"
2027     "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
2028 solar 1.61 #endif
2029 solar 1.164 return ret;
2030 solar 1.1 }
2031 vapier 1.155
2032     /* Match filename against entries in matchlist, return TRUE
2033     * if the file is listed */
2034     static int file_matches_list(const char *filename, char **matchlist)
2035     {
2036     char **file;
2037     char *match;
2038     char buf[__PAX_UTILS_PATH_MAX];
2039    
2040     if (matchlist == NULL)
2041     return 0;
2042    
2043     for (file = matchlist; *file != NULL; file++) {
2044     if (search_path) {
2045     snprintf(buf, sizeof(buf), "%s%s", search_path, *file);
2046     match = buf;
2047     } else {
2048     match = *file;
2049     }
2050     if (fnmatch(match, filename, 0) == 0)
2051     return 1;
2052     }
2053     return 0;
2054     }

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