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Revision 1.194 - (hide annotations) (download) (as text)
Mon Sep 29 06:05:55 2008 UTC (5 years, 9 months ago) by vapier
Branch: MAIN
Changes since 1.193: +3 -2 lines
File MIME type: text/x-csrc
fix by Fabian Groffen to make sure default output format starts off initialized before we start strcating it #236539

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 1.194 * $Header: /var/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.193 2008/09/29 06:03:26 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 1.194 static const char *rcsid = "$Id: scanelf.c,v 1.193 2008/09/29 06:03:26 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 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     if (sym->st_name) { \
1003 vapier 1.134 /* make sure the symbol name is in acceptable memory range */ \
1004 vapier 1.27 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
1005 vapier 1.115 if ((void*)symname > (void*)elf->data_end) { \
1006     warnf("%s: corrupt ELF symbols", elf->filename); \
1007 vapier 1.134 ++sym; \
1008 vapier 1.111 continue; \
1009     } \
1010 vapier 1.134 /* debug display ... show all symbols and some extra info */ \
1011 solar 1.176 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \
1012 solar 1.177 printf("%s(%s) %5lX %15s %s %s\n", \
1013 vapier 1.39 ((*found_sym == 0) ? "\n\t" : "\t"), \
1014 vapier 1.76 elf->base_filename, \
1015 vapier 1.94 (unsigned long)sym->st_size, \
1016 vapier 1.95 get_elfstttype(sym->st_info), \
1017 solar 1.177 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1018 vapier 1.39 *found_sym = 1; \
1019 vapier 1.95 } else { \
1020 vapier 1.134 /* allow the user to specify a comma delimited list of symbols to search for */ \
1021 vapier 1.156 char *this_sym, *this_sym_ver, *next_sym; \
1022 vapier 1.134 this_sym = ret; \
1023 vapier 1.156 this_sym_ver = versioned_symname; \
1024 vapier 1.95 do { \
1025     next_sym = strchr(this_sym, ','); \
1026     if (next_sym == NULL) \
1027     next_sym = this_sym + strlen(this_sym); \
1028 vapier 1.134 /* do we want a defined symbol ? */ \
1029     if (*this_sym == '+') { \
1030 vapier 1.140 if (sym->st_shndx == SHN_UNDEF) \
1031 vapier 1.134 goto skip_this_sym##B; \
1032     ++this_sym; \
1033 vapier 1.156 ++this_sym_ver; \
1034 vapier 1.134 /* do we want an undefined symbol ? */ \
1035     } else if (*this_sym == '-') { \
1036 vapier 1.140 if (sym->st_shndx != SHN_UNDEF) \
1037 vapier 1.134 goto skip_this_sym##B; \
1038     ++this_sym; \
1039 vapier 1.156 ++this_sym_ver; \
1040 vapier 1.134 } \
1041     /* ok, lets compare the name now */ \
1042 vapier 1.95 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
1043 vapier 1.156 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
1044 solar 1.132 if (be_semi_verbose) { \
1045     char buf[126]; \
1046     snprintf(buf, sizeof(buf), "%lX %s %s", \
1047     (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1048     ret = buf; \
1049     } else \
1050     ret = this_sym; \
1051 vapier 1.95 (*found_sym)++; \
1052     goto break_out; \
1053     } \
1054 vapier 1.134 skip_this_sym##B: this_sym = next_sym + 1; \
1055 vapier 1.95 } while (*next_sym != '\0'); \
1056     } \
1057 vapier 1.27 } \
1058     ++sym; \
1059     } }
1060     FIND_SYM(32)
1061     FIND_SYM(64)
1062 vapier 1.39 }
1063 vapier 1.70
1064 vapier 1.95 break_out:
1065 solar 1.127 if (be_wewy_wewy_quiet) return NULL;
1066 vapier 1.70
1067 vapier 1.41 if (*find_sym != '*' && *found_sym)
1068 vapier 1.95 return ret;
1069 vapier 1.41 if (be_quiet)
1070     return NULL;
1071     else
1072 solar 1.68 return (char *)" - ";
1073 vapier 1.39 }
1074 solar 1.119
1075 solar 1.124 static char *scanelf_file_sections(elfobj *elf, char *found_section)
1076     {
1077     if (!find_section)
1078     return NULL;
1079    
1080     #define FIND_SECTION(B) \
1081     if (elf->elf_class == ELFCLASS ## B) { \
1082 solar 1.136 int invert; \
1083 solar 1.124 Elf ## B ## _Shdr *section; \
1084 solar 1.136 invert = (*find_section == '!' ? 1 : 0); \
1085     section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \
1086     if ((section == NULL && invert) || (section != NULL && !invert)) \
1087 solar 1.124 *found_section = 1; \
1088     }
1089     FIND_SECTION(32)
1090     FIND_SECTION(64)
1091    
1092 vapier 1.138 if (be_wewy_wewy_quiet)
1093     return NULL;
1094 solar 1.124
1095     if (*found_section)
1096     return find_section;
1097    
1098     if (be_quiet)
1099     return NULL;
1100     else
1101     return (char *)" - ";
1102     }
1103    
1104 vapier 1.39 /* scan an elf file and show all the fun stuff */
1105 solar 1.57 #define prints(str) write(fileno(stdout), str, strlen(str))
1106 vapier 1.106 static int scanelf_elfobj(elfobj *elf)
1107 vapier 1.39 {
1108 vapier 1.44 unsigned long i;
1109 vapier 1.162 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1110     found_rpath, found_needed, found_interp, found_bind, found_soname,
1111 solar 1.124 found_sym, found_lib, found_file, found_textrels, found_section;
1112 vapier 1.41 static char *out_buffer = NULL;
1113     static size_t out_len;
1114 vapier 1.39
1115 vapier 1.76 found_pax = found_phdr = found_relro = found_load = found_textrel = \
1116 vapier 1.84 found_rpath = found_needed = found_interp = found_bind = found_soname = \
1117 solar 1.124 found_sym = found_lib = found_file = found_textrels = found_section = 0;
1118 vapier 1.39
1119 vapier 1.114 if (be_verbose > 2)
1120 vapier 1.106 printf("%s: scanning file {%s,%s}\n", elf->filename,
1121 vapier 1.69 get_elfeitype(EI_CLASS, elf->elf_class),
1122     get_elfeitype(EI_DATA, elf->data[EI_DATA]));
1123 vapier 1.114 else if (be_verbose > 1)
1124 vapier 1.106 printf("%s: scanning file\n", elf->filename);
1125 vapier 1.39
1126 vapier 1.41 /* init output buffer */
1127     if (!out_buffer) {
1128     out_len = sizeof(char) * 80;
1129 vapier 1.186 out_buffer = xmalloc(out_len);
1130 vapier 1.41 }
1131     *out_buffer = '\0';
1132    
1133 vapier 1.39 /* show the header */
1134     if (!be_quiet && show_banner) {
1135 vapier 1.49 for (i = 0; out_format[i]; ++i) {
1136 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
1137 vapier 1.41
1138     switch (out_format[++i]) {
1139 solar 1.132 case '+': break;
1140 vapier 1.41 case '%': break;
1141 vapier 1.70 case '#': break;
1142 vapier 1.66 case 'F':
1143     case 'p':
1144     case 'f': prints("FILE "); found_file = 1; break;
1145 vapier 1.41 case 'o': prints(" TYPE "); break;
1146     case 'x': prints(" PAX "); break;
1147 vapier 1.71 case 'e': prints("STK/REL/PTL "); break;
1148 vapier 1.41 case 't': prints("TEXTREL "); break;
1149     case 'r': prints("RPATH "); break;
1150 vapier 1.171 case 'M': prints("CLASS "); break;
1151 vapier 1.41 case 'n': prints("NEEDED "); break;
1152     case 'i': prints("INTERP "); break;
1153 vapier 1.49 case 'b': prints("BIND "); break;
1154 solar 1.190 case 'Z': prints("SIZE "); break;
1155 vapier 1.84 case 'S': prints("SONAME "); break;
1156 vapier 1.41 case 's': prints("SYM "); break;
1157 vapier 1.72 case 'N': prints("LIB "); break;
1158 vapier 1.76 case 'T': prints("TEXTRELS "); break;
1159 vapier 1.126 case 'k': prints("SECTION "); break;
1160 vapier 1.166 case 'a': prints("ARCH "); break;
1161 solar 1.191 case 'I': prints("OSABI "); break;
1162     case 'Y': prints("EABI "); break;
1163 solar 1.180 case 'O': prints("PERM "); break;
1164 solar 1.181 case 'D': prints("ENDIAN "); break;
1165 vapier 1.76 default: warnf("'%c' has no title ?", out_format[i]);
1166 vapier 1.39 }
1167 vapier 1.27 }
1168 vapier 1.49 if (!found_file) prints("FILE ");
1169 vapier 1.41 prints("\n");
1170 vapier 1.49 found_file = 0;
1171 vapier 1.39 show_banner = 0;
1172     }
1173    
1174     /* dump all the good stuff */
1175 vapier 1.49 for (i = 0; out_format[i]; ++i) {
1176 vapier 1.41 const char *out;
1177 vapier 1.66 const char *tmp;
1178 solar 1.190 static char ubuf[sizeof(unsigned long)*2];
1179 vapier 1.70 if (!IS_MODIFIER(out_format[i])) {
1180 vapier 1.41 xchrcat(&out_buffer, out_format[i], &out_len);
1181     continue;
1182     }
1183 vapier 1.39
1184 vapier 1.41 out = NULL;
1185 solar 1.127 be_wewy_wewy_quiet = (out_format[i] == '#');
1186 solar 1.132 be_semi_verbose = (out_format[i] == '+');
1187 vapier 1.41 switch (out_format[++i]) {
1188 solar 1.132 case '+':
1189 vapier 1.70 case '%':
1190     case '#':
1191     xchrcat(&out_buffer, out_format[i], &out_len); break;
1192     case 'F':
1193 vapier 1.76 found_file = 1;
1194 solar 1.127 if (be_wewy_wewy_quiet) break;
1195 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
1196 vapier 1.70 break;
1197 vapier 1.66 case 'p':
1198 vapier 1.76 found_file = 1;
1199 solar 1.127 if (be_wewy_wewy_quiet) break;
1200 vapier 1.106 tmp = elf->filename;
1201 vapier 1.66 if (search_path) {
1202     ssize_t len_search = strlen(search_path);
1203 vapier 1.106 ssize_t len_file = strlen(elf->filename);
1204     if (!strncmp(elf->filename, search_path, len_search) && \
1205 vapier 1.66 len_file > len_search)
1206     tmp += len_search;
1207     if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
1208     }
1209     xstrcat(&out_buffer, tmp, &out_len);
1210     break;
1211     case 'f':
1212 vapier 1.76 found_file = 1;
1213 solar 1.127 if (be_wewy_wewy_quiet) break;
1214 vapier 1.106 tmp = strrchr(elf->filename, '/');
1215     tmp = (tmp == NULL ? elf->filename : tmp+1);
1216 vapier 1.66 xstrcat(&out_buffer, tmp, &out_len);
1217     break;
1218 vapier 1.41 case 'o': out = get_elfetype(elf); break;
1219     case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1220 solar 1.73 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
1221 vapier 1.41 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1222 vapier 1.79 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
1223 vapier 1.41 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1224 vapier 1.171 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1225 solar 1.181 case 'D': out = get_endian(elf); break;
1226 solar 1.180 case 'O': out = getstr_perms(elf->filename); break;
1227 vapier 1.72 case 'n':
1228     case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
1229 vapier 1.41 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1230 vapier 1.49 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1231 vapier 1.84 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1232 vapier 1.72 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1233 solar 1.124 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1234 vapier 1.166 case 'a': out = get_elfemtype(elf); break;
1235 solar 1.191 case 'I': out = get_elfosabi(elf); break;
1236     case 'Y': out = get_elf_eabi(elf); break;
1237 vapier 1.193 case 'Z': snprintf(ubuf, sizeof(ubuf), "%lu", (unsigned long)elf->len); out = ubuf; break;;
1238 vapier 1.76 default: warnf("'%c' has no scan code?", out_format[i]);
1239 vapier 1.29 }
1240 vapier 1.95 if (out) {
1241     /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1242     if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1243     xstrncat(&out_buffer, out, &out_len, (tmp-out));
1244     else
1245     xstrcat(&out_buffer, out, &out_len);
1246     }
1247 vapier 1.39 }
1248    
1249 vapier 1.54 #define FOUND_SOMETHING() \
1250 solar 1.73 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1251 vapier 1.76 found_rpath || found_needed || found_interp || found_bind || \
1252 solar 1.124 found_soname || found_sym || found_lib || found_textrels || found_section )
1253 vapier 1.54
1254     if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
1255     xchrcat(&out_buffer, ' ', &out_len);
1256 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
1257 vapier 1.27 }
1258 vapier 1.79 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
1259 vapier 1.41 puts(out_buffer);
1260 vapier 1.79 fflush(stdout);
1261     }
1262 vapier 1.10
1263 vapier 1.105 return 0;
1264     }
1265    
1266 vapier 1.106 /* scan a single elf */
1267     static int scanelf_elf(const char *filename, int fd, size_t len)
1268     {
1269 solar 1.120 int ret = 1;
1270 vapier 1.106 elfobj *elf;
1271    
1272     /* verify this is real ELF */
1273     if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1274     if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1275 solar 1.120 return ret;
1276     }
1277     switch (match_bits) {
1278     case 32:
1279     if (elf->elf_class != ELFCLASS32)
1280     goto label_done;
1281     break;
1282     case 64:
1283     if (elf->elf_class != ELFCLASS64)
1284     goto label_done;
1285     break;
1286     default: break;
1287 vapier 1.106 }
1288 solar 1.119 if (strlen(match_etypes)) {
1289     char sbuf[126];
1290     strncpy(sbuf, match_etypes, sizeof(sbuf));
1291     if (strchr(match_etypes, ',') != NULL) {
1292     char *p;
1293 vapier 1.186 while ((p = strrchr(sbuf, ',')) != NULL) {
1294 solar 1.119 *p = 0;
1295 solar 1.129 if (etype_lookup(p+1) == get_etype(elf))
1296 solar 1.119 goto label_ret;
1297     }
1298     }
1299 solar 1.129 if (etype_lookup(sbuf) != get_etype(elf))
1300 solar 1.119 goto label_done;
1301     }
1302    
1303     label_ret:
1304 vapier 1.106 ret = scanelf_elfobj(elf);
1305 solar 1.119
1306     label_done:
1307 vapier 1.106 unreadelf(elf);
1308     return ret;
1309     }
1310 solar 1.119
1311 vapier 1.105 /* scan an archive of elfs */
1312 vapier 1.106 static int scanelf_archive(const char *filename, int fd, size_t len)
1313 vapier 1.105 {
1314 vapier 1.106 archive_handle *ar;
1315 vapier 1.105 archive_member *m;
1316 vapier 1.106 char *ar_buffer;
1317     elfobj *elf;
1318    
1319     ar = ar_open_fd(filename, fd);
1320     if (ar == NULL)
1321     return 1;
1322    
1323     ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1324     while ((m=ar_next(ar)) != NULL) {
1325     elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1326     if (elf) {
1327     scanelf_elfobj(elf);
1328     unreadelf(elf);
1329     }
1330     }
1331     munmap(ar_buffer, len);
1332    
1333 vapier 1.105 return 0;
1334     }
1335     /* scan a file which may be an elf or an archive or some other magical beast */
1336 solar 1.164 static int scanelf_file(const char *filename, const struct stat *st_cache)
1337 vapier 1.105 {
1338 vapier 1.161 const struct stat *st = st_cache;
1339     struct stat symlink_st;
1340 vapier 1.106 int fd;
1341 vapier 1.105
1342     /* always handle regular files and handle symlinked files if no -y */
1343 vapier 1.161 if (S_ISLNK(st->st_mode)) {
1344 solar 1.164 if (!scan_symlink) return 1;
1345 vapier 1.161 stat(filename, &symlink_st);
1346     st = &symlink_st;
1347 vapier 1.105 }
1348 vapier 1.161
1349     if (!S_ISREG(st->st_mode)) {
1350 vapier 1.105 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1351 solar 1.164 return 1;
1352 vapier 1.105 }
1353    
1354 solar 1.180 if (match_perms) {
1355     if ((st->st_mode | match_perms) != st->st_mode)
1356     return 1;
1357     }
1358 vapier 1.106 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1359 solar 1.164 return 1;
1360 vapier 1.106
1361 vapier 1.161 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1362 vapier 1.105 /* if it isn't an ELF, maybe it's an .a archive */
1363 vapier 1.161 scanelf_archive(filename, fd, st->st_size);
1364 vapier 1.106
1365     close(fd);
1366 solar 1.164 return 0;
1367 solar 1.6 }
1368    
1369 solar 1.1 /* scan a directory for ET_EXEC files and print when we find one */
1370 solar 1.164 static int scanelf_dir(const char *path)
1371 solar 1.1 {
1372 vapier 1.10 register DIR *dir;
1373     register struct dirent *dentry;
1374 vapier 1.14 struct stat st_top, st;
1375 vapier 1.104 char buf[__PAX_UTILS_PATH_MAX];
1376 vapier 1.32 size_t pathlen = 0, len = 0;
1377 solar 1.164 int ret = 0;
1378 vapier 1.10
1379     /* make sure path exists */
1380 vapier 1.39 if (lstat(path, &st_top) == -1) {
1381     if (be_verbose > 2) printf("%s: does not exist\n", path);
1382 solar 1.164 return 1;
1383 vapier 1.39 }
1384 solar 1.11
1385 vapier 1.10 /* ok, if it isn't a directory, assume we can open it */
1386 vapier 1.14 if (!S_ISDIR(st_top.st_mode)) {
1387 solar 1.164 return scanelf_file(path, &st_top);
1388 vapier 1.10 }
1389    
1390     /* now scan the dir looking for fun stuff */
1391     if ((dir = opendir(path)) == NULL) {
1392     warnf("could not opendir %s: %s", path, strerror(errno));
1393 solar 1.164 return 1;
1394 vapier 1.10 }
1395 vapier 1.114 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1396 solar 1.11
1397 vapier 1.32 pathlen = strlen(path);
1398 vapier 1.10 while ((dentry = readdir(dir))) {
1399     if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
1400     continue;
1401 vapier 1.32 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
1402     if (len >= sizeof(buf)) {
1403 vapier 1.76 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1404     (unsigned long)len, (unsigned long)sizeof(buf));
1405 vapier 1.32 continue;
1406     }
1407 solar 1.143 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
1408 solar 1.20 if (lstat(buf, &st) != -1) {
1409 vapier 1.10 if (S_ISREG(st.st_mode))
1410 solar 1.164 ret = scanelf_file(buf, &st);
1411 vapier 1.10 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1412 vapier 1.14 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1413 solar 1.164 ret = scanelf_dir(buf);
1414 vapier 1.10 }
1415     }
1416     }
1417     closedir(dir);
1418 solar 1.164 return ret;
1419 solar 1.1 }
1420    
1421 vapier 1.133 static int scanelf_from_file(const char *filename)
1422 vapier 1.47 {
1423 solar 1.45 FILE *fp = NULL;
1424     char *p;
1425 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1426 solar 1.164 int ret = 0;
1427 solar 1.45
1428 solar 1.132 if (strcmp(filename, "-") == 0)
1429 solar 1.45 fp = stdin;
1430     else if ((fp = fopen(filename, "r")) == NULL)
1431     return 1;
1432    
1433 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1434 solar 1.45 if ((p = strchr(path, '\n')) != NULL)
1435     *p = 0;
1436 vapier 1.66 search_path = path;
1437 solar 1.164 ret = scanelf_dir(path);
1438 solar 1.45 }
1439     if (fp != stdin)
1440     fclose(fp);
1441 solar 1.164 return ret;
1442 solar 1.45 }
1443    
1444 solar 1.154 #if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1445 vapier 1.148
1446     static int load_ld_cache_config(int i, const char *fname)
1447 vapier 1.48 {
1448     FILE *fp = NULL;
1449     char *p;
1450 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1451 vapier 1.48
1452 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1453 solar 1.123 return i;
1454    
1455     if ((fp = fopen(fname, "r")) == NULL)
1456     return i;
1457 vapier 1.48
1458 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1459 vapier 1.48 if ((p = strrchr(path, '\r')) != NULL)
1460     *p = 0;
1461     if ((p = strchr(path, '\n')) != NULL)
1462     *p = 0;
1463 solar 1.154 #ifdef __linux__
1464 vapier 1.186 /* recursive includes of the same file will make this segfault. */
1465 solar 1.129 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1466 solar 1.123 glob64_t gl;
1467     size_t x;
1468     char gpath[__PAX_UTILS_PATH_MAX];
1469    
1470 solar 1.129 memset(gpath, 0, sizeof(gpath));
1471 solar 1.123
1472     if (path[8] != '/')
1473 solar 1.129 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]);
1474 solar 1.123 else
1475 solar 1.129 strncpy(gpath, &path[8], sizeof(gpath));
1476 solar 1.123
1477     if ((glob64(gpath, 0, NULL, &gl)) == 0) {
1478     for (x = 0; x < gl.gl_pathc; ++x) {
1479     /* try to avoid direct loops */
1480     if (strcmp(gl.gl_pathv[x], fname) == 0)
1481     continue;
1482 vapier 1.148 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1483 vapier 1.149 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1484 solar 1.123 globfree64(&gl);
1485     return i;
1486     }
1487     }
1488     globfree64 (&gl);
1489     continue;
1490 solar 1.160 }
1491 solar 1.123 }
1492 solar 1.154 #endif
1493 solar 1.123 if (*path != '/')
1494     continue;
1495 vapier 1.48
1496     ldpaths[i++] = xstrdup(path);
1497    
1498 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1499 vapier 1.48 break;
1500     }
1501     ldpaths[i] = NULL;
1502    
1503     fclose(fp);
1504 solar 1.123 return i;
1505 vapier 1.48 }
1506 flameeyes 1.141
1507 vapier 1.148 #elif defined(__FreeBSD__) || (__DragonFly__)
1508    
1509     static int load_ld_cache_config(int i, const char *fname)
1510 flameeyes 1.141 {
1511     FILE *fp = NULL;
1512     char *b = NULL, *p;
1513     struct elfhints_hdr hdr;
1514 vapier 1.152
1515 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1516 flameeyes 1.141 return i;
1517    
1518     if ((fp = fopen(fname, "r")) == NULL)
1519     return i;
1520    
1521 vapier 1.152 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1522     hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1523     fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1524     {
1525 flameeyes 1.141 fclose(fp);
1526     return i;
1527     }
1528 vapier 1.152
1529 vapier 1.186 b = xmalloc(hdr.dirlistlen + 1);
1530 vapier 1.152 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1531 flameeyes 1.141 fclose(fp);
1532     free(b);
1533     return i;
1534     }
1535 vapier 1.152
1536     while ((p = strsep(&b, ":"))) {
1537     if (*p == '\0') continue;
1538 flameeyes 1.141 ldpaths[i++] = xstrdup(p);
1539 vapier 1.152
1540 vapier 1.149 if (i + 1 == ARRAY_SIZE(ldpaths))
1541 flameeyes 1.141 break;
1542     }
1543     ldpaths[i] = NULL;
1544 vapier 1.157
1545 flameeyes 1.141 free(b);
1546     fclose(fp);
1547     return i;
1548     }
1549 vapier 1.148
1550     #else
1551 vapier 1.192 #ifdef __ELF__
1552 vapier 1.148 #warning Cache config support not implemented for your target
1553 vapier 1.192 #endif
1554 vapier 1.148 static int load_ld_cache_config(int i, const char *fname)
1555     {
1556     memset(ldpaths, 0x00, sizeof(ldpaths));
1557 vapier 1.192 return 0;
1558 vapier 1.148 }
1559 flameeyes 1.141 #endif
1560 vapier 1.48
1561 vapier 1.10 /* scan /etc/ld.so.conf for paths */
1562 vapier 1.184 static void scanelf_ldpath(void)
1563 vapier 1.10 {
1564 vapier 1.17 char scan_l, scan_ul, scan_ull;
1565 vapier 1.48 int i = 0;
1566 vapier 1.10
1567 vapier 1.48 if (!ldpaths[0])
1568     err("Unable to load any paths from ld.so.conf");
1569 vapier 1.10
1570 vapier 1.17 scan_l = scan_ul = scan_ull = 0;
1571    
1572 vapier 1.48 while (ldpaths[i]) {
1573     if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
1574     if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
1575     if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
1576     scanelf_dir(ldpaths[i]);
1577     ++i;
1578     }
1579 vapier 1.10
1580 vapier 1.17 if (!scan_l) scanelf_dir("/lib");
1581     if (!scan_ul) scanelf_dir("/usr/lib");
1582     if (!scan_ull) scanelf_dir("/usr/local/lib");
1583 vapier 1.10 }
1584 solar 1.1
1585 vapier 1.10 /* scan env PATH for paths */
1586 vapier 1.184 static void scanelf_envpath(void)
1587 solar 1.1 {
1588 solar 1.34 char *path, *p;
1589 vapier 1.10
1590     path = getenv("PATH");
1591     if (!path)
1592     err("PATH is not set in your env !");
1593 vapier 1.41 path = xstrdup(path);
1594 vapier 1.10
1595     while ((p = strrchr(path, ':')) != NULL) {
1596     scanelf_dir(p + 1);
1597     *p = 0;
1598     }
1599 vapier 1.17
1600 solar 1.34 free(path);
1601 solar 1.1 }
1602    
1603 solar 1.191 /* usage / invocation handling functions */ /* Free Flags: c d j u w C G H J K P Q U W */
1604     #define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZBhV"
1605 vapier 1.27 #define a_argument required_argument
1606 vapier 1.10 static struct option const long_opts[] = {
1607     {"path", no_argument, NULL, 'p'},
1608     {"ldpath", no_argument, NULL, 'l'},
1609     {"recursive", no_argument, NULL, 'R'},
1610 vapier 1.14 {"mount", no_argument, NULL, 'm'},
1611 vapier 1.37 {"symlink", no_argument, NULL, 'y'},
1612 vapier 1.105 {"archives", no_argument, NULL, 'A'},
1613     {"ldcache", no_argument, NULL, 'L'},
1614 vapier 1.101 {"fix", no_argument, NULL, 'X'},
1615 solar 1.127 {"setpax", a_argument, NULL, 'z'},
1616 vapier 1.10 {"pax", no_argument, NULL, 'x'},
1617 solar 1.16 {"header", no_argument, NULL, 'e'},
1618 vapier 1.10 {"textrel", no_argument, NULL, 't'},
1619     {"rpath", no_argument, NULL, 'r'},
1620 vapier 1.32 {"needed", no_argument, NULL, 'n'},
1621 vapier 1.38 {"interp", no_argument, NULL, 'i'},
1622 vapier 1.49 {"bind", no_argument, NULL, 'b'},
1623 vapier 1.84 {"soname", no_argument, NULL, 'S'},
1624 vapier 1.76 {"symbol", a_argument, NULL, 's'},
1625 solar 1.124 {"section", a_argument, NULL, 'k'},
1626 vapier 1.76 {"lib", a_argument, NULL, 'N'},
1627 solar 1.86 {"gmatch", no_argument, NULL, 'g'},
1628 vapier 1.76 {"textrels", no_argument, NULL, 'T'},
1629 solar 1.119 {"etype", a_argument, NULL, 'E'},
1630 solar 1.120 {"bits", a_argument, NULL, 'M'},
1631 solar 1.181 {"endian", no_argument, NULL, 'D'},
1632 solar 1.191 {"osabi", no_argument, NULL, 'I'},
1633     {"eabi", no_argument, NULL, 'Y'},
1634 solar 1.180 {"perms", a_argument, NULL, 'O'},
1635 solar 1.190 {"size", no_argument, NULL, 'Z'},
1636 vapier 1.10 {"all", no_argument, NULL, 'a'},
1637     {"quiet", no_argument, NULL, 'q'},
1638 vapier 1.14 {"verbose", no_argument, NULL, 'v'},
1639 vapier 1.76 {"format", a_argument, NULL, 'F'},
1640     {"from", a_argument, NULL, 'f'},
1641     {"file", a_argument, NULL, 'o'},
1642 solar 1.16 {"nobanner", no_argument, NULL, 'B'},
1643 vapier 1.10 {"help", no_argument, NULL, 'h'},
1644     {"version", no_argument, NULL, 'V'},
1645     {NULL, no_argument, NULL, 0x0}
1646     };
1647 solar 1.57
1648 solar 1.68 static const char *opts_help[] = {
1649 vapier 1.10 "Scan all directories in PATH environment",
1650     "Scan all directories in /etc/ld.so.conf",
1651 vapier 1.14 "Scan directories recursively",
1652 vapier 1.37 "Don't recursively cross mount points",
1653 vapier 1.101 "Don't scan symlinks",
1654 vapier 1.105 "Scan archives (.a files)",
1655     "Utilize ld.so.cache information (use with -r/-n)",
1656 solar 1.127 "Try and 'fix' bad things (use with -r/-e)",
1657     "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
1658 vapier 1.10 "Print PaX markings",
1659 vapier 1.71 "Print GNU_STACK/PT_LOAD markings",
1660 vapier 1.10 "Print TEXTREL information",
1661     "Print RPATH information",
1662 vapier 1.32 "Print NEEDED information",
1663 vapier 1.38 "Print INTERP information",
1664 vapier 1.49 "Print BIND information",
1665 vapier 1.84 "Print SONAME information",
1666 vapier 1.27 "Find a specified symbol",
1667 solar 1.124 "Find a specified section",
1668 vapier 1.72 "Find a specified library",
1669 solar 1.86 "Use strncmp to match libraries. (use with -N)",
1670 vapier 1.76 "Locate cause of TEXTREL",
1671 solar 1.129 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1672 solar 1.120 "Print only ELF files matching numeric bits",
1673 solar 1.181 "Print Endianness",
1674 solar 1.191 "Print OSABI",
1675     "Print EABI (EM_ARM Only)",
1676 solar 1.180 "Print only ELF files matching octal permissions",
1677 solar 1.190 "Print ELF file size",
1678 vapier 1.82 "Print all scanned info (-x -e -t -r -b)\n",
1679 vapier 1.14 "Only output 'bad' things",
1680     "Be verbose (can be specified more than once)",
1681 vapier 1.39 "Use specified format for output",
1682 solar 1.45 "Read input stream from a filename",
1683 vapier 1.24 "Write output stream to a filename",
1684 vapier 1.14 "Don't display the header",
1685 vapier 1.10 "Print this help and exit",
1686     "Print version and exit",
1687     NULL
1688     };
1689    
1690     /* display usage and exit */
1691     static void usage(int status)
1692 solar 1.1 {
1693 vapier 1.44 unsigned long i;
1694 solar 1.52 printf("* Scan ELF binaries for stuff\n\n"
1695 vapier 1.105 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1696 solar 1.35 printf("Options: -[%s]\n", PARSE_FLAGS);
1697 vapier 1.10 for (i = 0; long_opts[i].name; ++i)
1698 vapier 1.27 if (long_opts[i].has_arg == no_argument)
1699 vapier 1.157 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1700 vapier 1.27 long_opts[i].name, opts_help[i]);
1701     else
1702 solar 1.124 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1703 vapier 1.27 long_opts[i].name, opts_help[i]);
1704 solar 1.45
1705 vapier 1.173 puts("\nFor more information, see the scanelf(1) manpage");
1706 vapier 1.10 exit(status);
1707 solar 1.1 }
1708    
1709     /* parse command line arguments and preform needed actions */
1710 vapier 1.165 #define do_pax_state(option, flag) \
1711     if (islower(option)) { \
1712     flags &= ~PF_##flag; \
1713     flags |= PF_NO##flag; \
1714     } else { \
1715     flags &= ~PF_NO##flag; \
1716     flags |= PF_##flag; \
1717     }
1718 solar 1.164 static int parseargs(int argc, char *argv[])
1719 vapier 1.10 {
1720 vapier 1.48 int i;
1721 vapier 1.133 const char *from_file = NULL;
1722 solar 1.164 int ret = 0;
1723 vapier 1.10
1724     opterr = 0;
1725 vapier 1.48 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1726     switch (i) {
1727 vapier 1.10
1728 vapier 1.39 case 'V':
1729 vapier 1.80 printf("pax-utils-%s: %s compiled %s\n%s\n"
1730     "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
1731     VERSION, __FILE__, __DATE__, rcsid, argv0);
1732 vapier 1.10 exit(EXIT_SUCCESS);
1733     break;
1734     case 'h': usage(EXIT_SUCCESS); break;
1735 solar 1.45 case 'f':
1736 vapier 1.100 if (from_file) warn("You prob don't want to specify -f twice");
1737     from_file = optarg;
1738 solar 1.45 break;
1739 solar 1.119 case 'E':
1740     strncpy(match_etypes, optarg, sizeof(match_etypes));
1741     break;
1742 solar 1.120 case 'M':
1743     match_bits = atoi(optarg);
1744 solar 1.182 if (match_bits == 0) {
1745     if (strcmp(optarg, "ELFCLASS32") == 0)
1746     match_bits = 32;
1747     if (strcmp(optarg, "ELFCLASS64") == 0)
1748     match_bits = 64;
1749     }
1750 solar 1.120 break;
1751 solar 1.180 case 'O':
1752     if (sscanf(optarg, "%o", &match_perms) == (-1))
1753     match_bits = 0;
1754     break;
1755 vapier 1.24 case 'o': {
1756 vapier 1.146 if (freopen(optarg, "w", stdout) == NULL)
1757 vapier 1.24 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1758 solar 1.21 break;
1759     }
1760 solar 1.124 case 'k':
1761 vapier 1.126 if (find_section) warn("You prob don't want to specify -k twice");
1762 solar 1.124 find_section = optarg;
1763     break;
1764 vapier 1.39 case 's': {
1765 vapier 1.93 if (find_sym) warn("You prob don't want to specify -s twice");
1766     find_sym = optarg;
1767 vapier 1.186 versioned_symname = xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1768 vapier 1.39 sprintf(versioned_symname, "%s@", find_sym);
1769     break;
1770     }
1771 vapier 1.72 case 'N': {
1772 vapier 1.93 if (find_lib) warn("You prob don't want to specify -N twice");
1773     find_lib = optarg;
1774 vapier 1.72 break;
1775     }
1776 vapier 1.39
1777     case 'F': {
1778 vapier 1.93 if (out_format) warn("You prob don't want to specify -F twice");
1779     out_format = optarg;
1780 vapier 1.39 break;
1781     }
1782 solar 1.127 case 'z': {
1783 solar 1.129 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1784 solar 1.127 size_t x;
1785 vapier 1.27
1786 vapier 1.186 for (x = 0; x < strlen(optarg); x++) {
1787     switch (optarg[x]) {
1788 solar 1.127 case 'p':
1789     case 'P':
1790 vapier 1.165 do_pax_state(optarg[x], PAGEEXEC);
1791 solar 1.127 break;
1792     case 's':
1793     case 'S':
1794 vapier 1.165 do_pax_state(optarg[x], SEGMEXEC);
1795 solar 1.127 break;
1796     case 'm':
1797     case 'M':
1798 vapier 1.165 do_pax_state(optarg[x], MPROTECT);
1799 solar 1.127 break;
1800     case 'e':
1801     case 'E':
1802 vapier 1.165 do_pax_state(optarg[x], EMUTRAMP);
1803 solar 1.127 break;
1804     case 'r':
1805     case 'R':
1806 vapier 1.165 do_pax_state(optarg[x], RANDMMAP);
1807 solar 1.127 break;
1808     case 'x':
1809     case 'X':
1810 vapier 1.165 do_pax_state(optarg[x], RANDEXEC);
1811 solar 1.127 break;
1812     default:
1813     break;
1814     }
1815     }
1816     if (!(((flags & PF_PAGEEXEC) && (flags & PF_NOPAGEEXEC)) ||
1817     ((flags & PF_SEGMEXEC) && (flags & PF_NOSEGMEXEC)) ||
1818     ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)) ||
1819     ((flags & PF_RANDEXEC) && (flags & PF_NORANDEXEC)) ||
1820     ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1821     ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1822     setpax = flags;
1823     break;
1824     }
1825 solar 1.190 case 'Z': show_size = 1; break;
1826 solar 1.176 case 'g': g_match = 1; break;
1827 vapier 1.102 case 'L': use_ldcache = 1; break;
1828 vapier 1.37 case 'y': scan_symlink = 0; break;
1829 vapier 1.105 case 'A': scan_archives = 1; break;
1830 solar 1.16 case 'B': show_banner = 0; break;
1831 vapier 1.10 case 'l': scan_ldpath = 1; break;
1832     case 'p': scan_envpath = 1; break;
1833     case 'R': dir_recurse = 1; break;
1834 vapier 1.14 case 'm': dir_crossmount = 0; break;
1835 vapier 1.101 case 'X': ++fix_elf; break;
1836 vapier 1.10 case 'x': show_pax = 1; break;
1837 solar 1.73 case 'e': show_phdr = 1; break;
1838 vapier 1.10 case 't': show_textrel = 1; break;
1839     case 'r': show_rpath = 1; break;
1840 vapier 1.32 case 'n': show_needed = 1; break;
1841 vapier 1.38 case 'i': show_interp = 1; break;
1842 vapier 1.49 case 'b': show_bind = 1; break;
1843 vapier 1.84 case 'S': show_soname = 1; break;
1844 vapier 1.76 case 'T': show_textrels = 1; break;
1845 vapier 1.10 case 'q': be_quiet = 1; break;
1846 vapier 1.14 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1847 solar 1.183 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1848 solar 1.181 case 'D': show_endian = 1; break;
1849 solar 1.191 case 'I': show_osabi = 1; break;
1850     case 'Y': show_eabi = 1; break;
1851 vapier 1.10 case ':':
1852 vapier 1.113 err("Option '%c' is missing parameter", optopt);
1853 vapier 1.10 case '?':
1854 solar 1.119 err("Unknown option '%c' or argument missing", optopt);
1855 vapier 1.10 default:
1856 vapier 1.113 err("Unhandled option '%c'; please report this", i);
1857 vapier 1.10 }
1858     }
1859 solar 1.170 if (show_textrels && be_verbose) {
1860     if (which("objdump") != NULL)
1861     has_objdump = 1;
1862     }
1863 vapier 1.39 /* let the format option override all other options */
1864     if (out_format) {
1865 solar 1.73 show_pax = show_phdr = show_textrel = show_rpath = \
1866 vapier 1.84 show_needed = show_interp = show_bind = show_soname = \
1867 solar 1.191 show_textrels = show_perms = show_endian = show_size = \
1868     show_osabi = show_eabi = 0;
1869 vapier 1.48 for (i = 0; out_format[i]; ++i) {
1870 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
1871 vapier 1.39
1872 vapier 1.48 switch (out_format[++i]) {
1873 solar 1.132 case '+': break;
1874 vapier 1.39 case '%': break;
1875 vapier 1.70 case '#': break;
1876 vapier 1.39 case 'F': break;
1877 vapier 1.66 case 'p': break;
1878     case 'f': break;
1879 solar 1.124 case 'k': break;
1880 vapier 1.39 case 's': break;
1881 vapier 1.72 case 'N': break;
1882 vapier 1.41 case 'o': break;
1883 vapier 1.166 case 'a': break;
1884 vapier 1.171 case 'M': break;
1885 solar 1.190 case 'Z': show_size = 1; break;
1886 solar 1.181 case 'D': show_endian = 1; break;
1887 solar 1.191 case 'I': show_osabi = 1; break;
1888     case 'Y': show_eabi = 1; break;
1889 solar 1.180 case 'O': show_perms = 1; break;
1890 vapier 1.39 case 'x': show_pax = 1; break;
1891 solar 1.73 case 'e': show_phdr = 1; break;
1892 vapier 1.39 case 't': show_textrel = 1; break;
1893     case 'r': show_rpath = 1; break;
1894     case 'n': show_needed = 1; break;
1895     case 'i': show_interp = 1; break;
1896 vapier 1.49 case 'b': show_bind = 1; break;
1897 vapier 1.84 case 'S': show_soname = 1; break;
1898 vapier 1.76 case 'T': show_textrels = 1; break;
1899 vapier 1.39 default:
1900 vapier 1.162 err("Invalid format specifier '%c' (byte %i)",
1901 vapier 1.48 out_format[i], i+1);
1902 vapier 1.39 }
1903     }
1904 vapier 1.41
1905     /* construct our default format */
1906     } else {
1907     size_t fmt_len = 30;
1908 vapier 1.186 out_format = xmalloc(sizeof(char) * fmt_len);
1909 vapier 1.194 *out_format = '\0';
1910 vapier 1.76 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1911     if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1912 solar 1.180 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
1913 solar 1.190 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
1914 solar 1.181 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
1915 solar 1.191 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
1916     if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1917 vapier 1.76 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1918     if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1919     if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1920     if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1921     if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1922     if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1923 vapier 1.84 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1924 vapier 1.76 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
1925     if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1926 solar 1.124 if (find_section) xstrcat(&out_format, "%k ", &fmt_len);
1927 vapier 1.76 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
1928     if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1929 vapier 1.39 }
1930 vapier 1.41 if (be_verbose > 2) printf("Format: %s\n", out_format);
1931 vapier 1.39
1932     /* now lets actually do the scanning */
1933 vapier 1.102 if (scan_ldpath || use_ldcache)
1934 vapier 1.148 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1935 vapier 1.10 if (scan_ldpath) scanelf_ldpath();
1936     if (scan_envpath) scanelf_envpath();
1937 solar 1.153 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1938 vapier 1.133 from_file = "-";
1939 solar 1.45 if (from_file) {
1940     scanelf_from_file(from_file);
1941     from_file = *argv;
1942     }
1943     if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1944 vapier 1.25 err("Nothing to scan !?");
1945 vapier 1.66 while (optind < argc) {
1946     search_path = argv[optind++];
1947 solar 1.164 ret = scanelf_dir(search_path);
1948 vapier 1.66 }
1949 vapier 1.27
1950 vapier 1.39 /* clean up */
1951 vapier 1.152 free(versioned_symname);
1952 vapier 1.48 for (i = 0; ldpaths[i]; ++i)
1953     free(ldpaths[i]);
1954 solar 1.96
1955     if (ldcache != 0)
1956     munmap(ldcache, ldcache_size);
1957 solar 1.164 return ret;
1958 vapier 1.10 }
1959    
1960 vapier 1.150 static char **get_split_env(const char *envvar)
1961     {
1962 vapier 1.152 const char *delims = " \t\n";
1963 solar 1.143 char **envvals = NULL;
1964 vapier 1.152 char *env, *s;
1965 kevquinn 1.142 int nentry;
1966    
1967 solar 1.143 if ((env = getenv(envvar)) == NULL)
1968     return NULL;
1969 kevquinn 1.142
1970 solar 1.143 env = xstrdup(env);
1971     if (env == NULL)
1972     return NULL;
1973 kevquinn 1.142
1974 vapier 1.152 s = strtok(env, delims);
1975     if (s == NULL) {
1976     free(env);
1977     return NULL;
1978     }
1979    
1980 solar 1.143 nentry = 0;
1981 vapier 1.152 while (s != NULL) {
1982     ++nentry;
1983     envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
1984     envvals[nentry-1] = s;
1985     s = strtok(NULL, delims);
1986 kevquinn 1.142 }
1987 vapier 1.152 envvals[nentry] = NULL;
1988 kevquinn 1.142
1989 vapier 1.152 /* don't want to free(env) as it contains the memory that backs
1990     * the envvals array of strings */
1991 kevquinn 1.142 return envvals;
1992     }
1993 solar 1.181
1994 vapier 1.184 static void parseenv(void)
1995 vapier 1.150 {
1996     qa_textrels = get_split_env("QA_TEXTRELS");
1997     qa_execstack = get_split_env("QA_EXECSTACK");
1998     qa_wx_load = get_split_env("QA_WX_LOAD");
1999 vapier 1.41 }
2000 solar 1.163
2001 vapier 1.152 #ifdef __PAX_UTILS_CLEANUP
2002 vapier 1.184 static void cleanup(void)
2003 vapier 1.152 {
2004     free(out_format);
2005     free(qa_textrels);
2006     free(qa_execstack);
2007     free(qa_wx_load);
2008     }
2009     #endif
2010 vapier 1.41
2011 vapier 1.10 int main(int argc, char *argv[])
2012 solar 1.1 {
2013 solar 1.164 int ret;
2014 vapier 1.10 if (argc < 2)
2015     usage(EXIT_FAILURE);
2016 kevquinn 1.142 parseenv();
2017 solar 1.164 ret = parseargs(argc, argv);
2018 solar 1.21 fclose(stdout);
2019 vapier 1.152 #ifdef __PAX_UTILS_CLEANUP
2020     cleanup();
2021     warn("The calls to add/delete heap should be off:\n"
2022     "\t- 1 due to the out_buffer not being freed in scanelf_file()\n"
2023     "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
2024 solar 1.61 #endif
2025 solar 1.164 return ret;
2026 solar 1.1 }
2027 vapier 1.155
2028     /* Match filename against entries in matchlist, return TRUE
2029     * if the file is listed */
2030     static int file_matches_list(const char *filename, char **matchlist)
2031     {
2032     char **file;
2033     char *match;
2034     char buf[__PAX_UTILS_PATH_MAX];
2035    
2036     if (matchlist == NULL)
2037     return 0;
2038    
2039     for (file = matchlist; *file != NULL; file++) {
2040     if (search_path) {
2041     snprintf(buf, sizeof(buf), "%s%s", search_path, *file);
2042     match = buf;
2043     } else {
2044     match = *file;
2045     }
2046     if (fnmatch(match, filename, 0) == 0)
2047     return 1;
2048     }
2049     return 0;
2050     }

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