/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.71 Revision 1.119
1/* 1/*
2 * Copyright 2003-2005 Gentoo Foundation 2 * Copyright 2003-2006 Gentoo Foundation
3 * Distributed under the terms of the GNU General Public License v2 3 * Distributed under the terms of the GNU General Public License v2
4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.71 2005/06/04 02:50:50 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.119 2006/02/05 02:25:58 solar Exp $
5 * 5 *
6 ******************************************************************** 6 * Copyright 2003-2006 Ned Ludd - <solar@gentoo.org>
7 * This program is free software; you can redistribute it and/or 7 * Copyright 2004-2006 Mike Frysinger - <vapier@gentoo.org>
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of the
10 * License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
20 * MA 02111-1307, USA.
21 */ 8 */
22 9
23#include <stdio.h>
24#include <stdlib.h>
25#include <sys/types.h>
26#include <libgen.h>
27#include <limits.h>
28#define __USE_GNU
29#include <string.h>
30#include <errno.h>
31#include <unistd.h>
32#include <sys/stat.h>
33#include <dirent.h>
34#include <getopt.h>
35#include <assert.h>
36#include "paxelf.h" 10#include "paxinc.h"
37 11
38static const char *rcsid = "$Id: scanelf.c,v 1.71 2005/06/04 02:50:50 vapier Exp $"; 12static const char *rcsid = "$Id: scanelf.c,v 1.119 2006/02/05 02:25:58 solar Exp $";
39#define argv0 "scanelf" 13#define argv0 "scanelf"
40 14
41#define IS_MODIFIER(c) (c == '%' || c == '#') 15#define IS_MODIFIER(c) (c == '%' || c == '#')
42 16
43 17
44 18
45/* prototypes */ 19/* prototypes */
20static int scanelf_elfobj(elfobj *elf);
21static int scanelf_elf(const char *filename, int fd, size_t len);
22static int scanelf_archive(const char *filename, int fd, size_t len);
46static void scanelf_file(const char *filename); 23static void scanelf_file(const char *filename);
47static void scanelf_dir(const char *path); 24static void scanelf_dir(const char *path);
48static void scanelf_ldpath(); 25static void scanelf_ldpath(void);
49static void scanelf_envpath(); 26static void scanelf_envpath(void);
50static void usage(int status); 27static void usage(int status);
51static void parseargs(int argc, char *argv[]); 28static void parseargs(int argc, char *argv[]);
52static char *xstrdup(const char *s); 29static char *xstrdup(const char *s);
53static void *xmalloc(size_t size); 30static void *xmalloc(size_t size);
54static void xstrcat(char **dst, const char *src, size_t *curr_len); 31static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
32#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
55static inline void xchrcat(char **dst, const char append, size_t *curr_len); 33static inline void xchrcat(char **dst, const char append, size_t *curr_len);
56 34
57/* variables to control behavior */ 35/* variables to control behavior */
36static char match_etypes[126] = "";
58static char *ldpaths[256]; 37static char *ldpaths[256];
59static char scan_ldpath = 0; 38static char scan_ldpath = 0;
60static char scan_envpath = 0; 39static char scan_envpath = 0;
61static char scan_symlink = 1; 40static char scan_symlink = 1;
41static char scan_archives = 0;
62static char dir_recurse = 0; 42static char dir_recurse = 0;
63static char dir_crossmount = 1; 43static char dir_crossmount = 1;
64static char show_pax = 0; 44static char show_pax = 0;
65static char show_stack = 0; 45static char show_phdr = 0;
66static char show_textrel = 0; 46static char show_textrel = 0;
67static char show_rpath = 0; 47static char show_rpath = 0;
68static char show_needed = 0; 48static char show_needed = 0;
69static char show_interp = 0; 49static char show_interp = 0;
70static char show_bind = 0; 50static char show_bind = 0;
51static char show_soname = 0;
52static char show_textrels = 0;
71static char show_banner = 1; 53static char show_banner = 1;
72static char be_quiet = 0; 54static char be_quiet = 0;
73static char be_verbose = 0; 55static char be_verbose = 0;
74static char be_wewy_wewy_quiet = 0; 56static char be_wewy_wewy_quiet = 0;
75static char *find_sym = NULL, *versioned_symname = NULL; 57static char *find_sym = NULL, *versioned_symname = NULL;
58static char *find_lib = NULL;
76static char *out_format = NULL; 59static char *out_format = NULL;
77static char *search_path = NULL; 60static char *search_path = NULL;
61static char fix_elf = 0;
62static char gmatch = 0;
63static char use_ldcache = 0;
78 64
79 65
66caddr_t ldcache = 0;
67size_t ldcache_size = 0;
80 68
81/* sub-funcs for scanelf_file() */ 69/* sub-funcs for scanelf_file() */
70static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
71{
72 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
73#define GET_SYMTABS(B) \
74 if (elf->elf_class == ELFCLASS ## B) { \
75 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
76 /* debug sections */ \
77 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
78 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
79 /* runtime sections */ \
80 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
81 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
82 if (symtab && dynsym) { \
83 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \
84 } else { \
85 *sym = (void*)(symtab ? symtab : dynsym); \
86 } \
87 if (strtab && dynstr) { \
88 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \
89 } else { \
90 *tab = (void*)(strtab ? strtab : dynstr); \
91 } \
92 }
93 GET_SYMTABS(32)
94 GET_SYMTABS(64)
95}
82static char *scanelf_file_pax(elfobj *elf, char *found_pax) 96static char *scanelf_file_pax(elfobj *elf, char *found_pax)
83{ 97{
84 static char *paxflags;
85 static char ret[7]; 98 static char ret[7];
86 unsigned long i, shown; 99 unsigned long i, shown;
87
88 100
89 if (!show_pax) return NULL; 101 if (!show_pax) return NULL;
90 102
91 shown = 0; 103 shown = 0;
92 memset(&ret, 0, sizeof(ret)); 104 memset(&ret, 0, sizeof(ret));
111 SHOW_PAX(64) 123 SHOW_PAX(64)
112 } 124 }
113 125
114 /* fall back to EI_PAX if no PT_PAX was found */ 126 /* fall back to EI_PAX if no PT_PAX was found */
115 if (!*ret) { 127 if (!*ret) {
128 static char *paxflags;
116 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); 129 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
117 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) { 130 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
118 *found_pax = 1; 131 *found_pax = 1;
119 return paxflags; 132 return (be_wewy_wewy_quiet ? NULL : paxflags);
120 } 133 }
121 strncpy(ret, paxflags, sizeof(ret)); 134 strncpy(ret, paxflags, sizeof(ret));
122 // ++shown;
123 } 135 }
124 136
125 if (be_quiet && !shown) 137 if (be_wewy_wewy_quiet || (be_quiet && !shown))
126 return NULL;
127 return ret;
128
129}
130static char *scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro, char *found_load)
131{
132 static char ret[12];
133 char *found;
134 unsigned long i, off, shown, check_flags;
135 unsigned char multi_stack, multi_relro, multi_load;
136
137 if (!show_stack) return NULL;
138
139 memcpy(ret, "--- --- ---\0", 12);
140
141 shown = 0;
142 multi_stack = multi_relro = multi_load = 0;
143
144 if (elf->phdr) {
145#define SHOW_STACK(B) \
146 if (elf->elf_class == ELFCLASS ## B) { \
147 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
148 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
149 uint32_t flags; \
150 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
151 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
152 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
153 found = found_stack; \
154 off = 0; \
155 check_flags = PF_X; \
156 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
157 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
158 found = found_relro; \
159 off = 4; \
160 check_flags = PF_X; \
161 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
162 if (multi_load++ > 2) warnf("%s: more than 2 PT_LOAD's !?", elf->filename); \
163 found = found_load; \
164 off = 8; \
165 check_flags = PF_W|PF_X; \
166 } else \
167 continue; \
168 flags = EGET(phdr[i].p_flags); \
169 if (be_quiet && ((flags & check_flags) != check_flags)) \
170 continue; \
171 memcpy(ret+off, gnu_short_stack_flags(flags), 3); \
172 *found = 1; \
173 ++shown; \
174 } \
175 }
176 SHOW_STACK(32)
177 SHOW_STACK(64)
178 }
179
180 if (be_quiet && !shown)
181 return NULL; 138 return NULL;
182 else 139 else
183 return ret; 140 return ret;
184} 141}
142
143static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load)
144{
145 static char ret[12];
146 char *found;
147 unsigned long i, shown, multi_stack, multi_relro, multi_load;
148 int max_pt_load;
149
150 if (!show_phdr) return NULL;
151
152 memcpy(ret, "--- --- ---\0", 12);
153
154 shown = 0;
155 multi_stack = multi_relro = multi_load = 0;
156 max_pt_load = elf_max_pt_load(elf);
157
158#define NOTE_GNU_STACK ".note.GNU-stack"
159#define SHOW_PHDR(B) \
160 if (elf->elf_class == ELFCLASS ## B) { \
161 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
162 Elf ## B ## _Off offset; \
163 uint32_t flags, check_flags; \
164 if (elf->phdr != NULL) { \
165 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
166 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
167 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
168 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
169 found = found_phdr; \
170 offset = 0; \
171 check_flags = PF_X; \
172 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
173 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
174 found = found_relro; \
175 offset = 4; \
176 check_flags = PF_X; \
177 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
178 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \
179 if (multi_load++ > max_pt_load) warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
180 found = found_load; \
181 offset = 8; \
182 check_flags = PF_W|PF_X; \
183 } else \
184 continue; \
185 flags = EGET(phdr[i].p_flags); \
186 if (be_quiet && ((flags & check_flags) != check_flags)) \
187 continue; \
188 if (fix_elf && ((flags & PF_X) != flags)) { \
189 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \
190 ret[3] = ret[7] = '!'; \
191 flags = EGET(phdr[i].p_flags); \
192 } \
193 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
194 *found = 1; \
195 ++shown; \
196 } \
197 } else if (elf->shdr != NULL) { \
198 /* no program headers which means this is prob an object file */ \
199 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
200 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
201 char *str; \
202 if ((void*)strtbl > (void*)elf->data_end) \
203 goto skip_this_shdr##B; \
204 check_flags = SHF_WRITE|SHF_EXECINSTR; \
205 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
206 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
207 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
208 str = elf->data + offset; \
209 if (str > elf->data + offset + sizeof(NOTE_GNU_STACK)) continue; \
210 if (!strcmp(str, NOTE_GNU_STACK)) { \
211 if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \
212 flags = EGET(shdr[i].sh_flags); \
213 if (be_quiet && ((flags & check_flags) != check_flags)) \
214 continue; \
215 ++*found_phdr; \
216 shown = 1; \
217 if (flags & SHF_WRITE) ret[0] = 'W'; \
218 if (flags & SHF_ALLOC) ret[1] = 'A'; \
219 if (flags & SHF_EXECINSTR) ret[2] = 'X'; \
220 if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \
221 break; \
222 } \
223 } \
224 skip_this_shdr##B: \
225 if (!multi_stack) { \
226 *found_phdr = 1; \
227 shown = 1; \
228 memcpy(ret, "!WX", 3); \
229 } \
230 } \
231 }
232 SHOW_PHDR(32)
233 SHOW_PHDR(64)
234
235 if (be_wewy_wewy_quiet || (be_quiet && !shown))
236 return NULL;
237 else
238 return ret;
239}
185static char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 240static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
186{ 241{
187 static char ret[] = "TEXTREL"; 242 static const char *ret = "TEXTREL";
188 unsigned long i; 243 unsigned long i;
189 244
190 if (!show_textrel) return NULL; 245 if (!show_textrel && !show_textrels) return NULL;
191 246
192 if (elf->phdr) { 247 if (elf->phdr) {
193#define SHOW_TEXTREL(B) \ 248#define SHOW_TEXTREL(B) \
194 if (elf->elf_class == ELFCLASS ## B) { \ 249 if (elf->elf_class == ELFCLASS ## B) { \
195 Elf ## B ## _Dyn *dyn; \ 250 Elf ## B ## _Dyn *dyn; \
215 } 270 }
216 271
217 if (be_quiet || be_wewy_wewy_quiet) 272 if (be_quiet || be_wewy_wewy_quiet)
218 return NULL; 273 return NULL;
219 else 274 else
220 return (char *)" - "; 275 return " - ";
276}
277static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
278{
279 unsigned long s, r, rmax;
280 void *symtab_void, *strtab_void, *text_void;
281
282 if (!show_textrels) return NULL;
283
284 /* don't search for TEXTREL's if the ELF doesn't have any */
285 if (!*found_textrel) scanelf_file_textrel(elf, found_textrel);
286 if (!*found_textrel) return NULL;
287
288 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
289 text_void = elf_findsecbyname(elf, ".text");
290
291 if (symtab_void && strtab_void && text_void && elf->shdr) {
292#define SHOW_TEXTRELS(B) \
293 if (elf->elf_class == ELFCLASS ## B) { \
294 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
295 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
296 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
297 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
298 Elf ## B ## _Shdr *text = SHDR ## B (text_void); \
299 Elf ## B ## _Addr vaddr = EGET(text->sh_addr); \
300 uint ## B ## _t memsz = EGET(text->sh_size); \
301 Elf ## B ## _Rel *rel; \
302 Elf ## B ## _Rela *rela; \
303 /* search the section headers for relocations */ \
304 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
305 uint32_t sh_type = EGET(shdr[s].sh_type); \
306 if (sh_type == SHT_REL) { \
307 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \
308 rela = NULL; \
309 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
310 } else if (sh_type == SHT_RELA) { \
311 rel = NULL; \
312 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \
313 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
314 } else \
315 continue; \
316 /* now see if any of the relocs are in the .text */ \
317 for (r = 0; r < rmax; ++r) { \
318 unsigned long sym_max; \
319 Elf ## B ## _Addr offset_tmp; \
320 Elf ## B ## _Sym *func; \
321 Elf ## B ## _Sym *sym; \
322 Elf ## B ## _Addr r_offset; \
323 uint ## B ## _t r_info; \
324 if (sh_type == SHT_REL) { \
325 r_offset = EGET(rel[r].r_offset); \
326 r_info = EGET(rel[r].r_info); \
327 } else { \
328 r_offset = EGET(rela[r].r_offset); \
329 r_info = EGET(rela[r].r_info); \
330 } \
331 /* make sure this relocation is inside of the .text */ \
332 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
333 if (be_verbose <= 2) continue; \
334 } else \
335 *found_textrels = 1; \
336 /* locate this relocation symbol name */ \
337 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
338 if ((void*)sym > (void*)elf->data_end) { \
339 warn("%s: corrupt ELF symbol", elf->filename); \
340 continue; \
341 } \
342 sym_max = ELF ## B ## _R_SYM(r_info); \
343 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
344 sym += sym_max; \
345 else \
346 sym = NULL; \
347 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
348 /* show the raw details about this reloc */ \
349 printf(" %s: ", elf->base_filename); \
350 if (sym && sym->st_name) \
351 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \
352 else \
353 printf("(memory/fake?)"); \
354 printf(" [0x%lX]", (unsigned long)r_offset); \
355 /* now try to find the closest symbol that this rel is probably in */ \
356 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
357 func = NULL; \
358 offset_tmp = 0; \
359 while (sym_max--) { \
360 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
361 func = sym; \
362 offset_tmp = EGET(sym->st_value); \
363 } \
364 ++sym; \
365 } \
366 printf(" in "); \
367 if (func && func->st_name) \
368 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \
369 else \
370 printf("(NULL: fake?)"); \
371 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
372 } \
373 } }
374 SHOW_TEXTRELS(32)
375 SHOW_TEXTRELS(64)
376 }
377 if (!*found_textrels)
378 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
379
380 return NULL;
381}
382
383static void rpath_security_checks(elfobj *, char *, const char *);
384static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
385{
386 struct stat st;
387 switch (*item) {
388 case '/': break;
389 case '.':
390 warnf("Security problem with relative %s '%s' in %s", dt_type, item, elf->filename);
391 break;
392 case ':':
393 case '\0':
394 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
395 break;
396 case '$':
397 if (fstat(elf->fd, &st) != -1)
398 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
399 warnf("Security problem with %s='%s' in %s with mode set of %o",
400 dt_type, item, elf->filename, st.st_mode & 07777);
401 break;
402 default:
403 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
404 break;
405 }
221} 406}
222static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) 407static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
223{ 408{
224 unsigned long i, s; 409 unsigned long i, s;
225 char *rpath, *runpath, **r; 410 char *rpath, *runpath, **r;
259 /* Verify the memory is somewhat sane */ \ 444 /* Verify the memory is somewhat sane */ \
260 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 445 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
261 if (offset < (Elf ## B ## _Off)elf->len) { \ 446 if (offset < (Elf ## B ## _Off)elf->len) { \
262 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 447 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
263 *r = (char*)(elf->data + offset); \ 448 *r = (char*)(elf->data + offset); \
449 /* cache the length in case we need to nuke this section later on */ \
450 if (fix_elf) \
451 offset = strlen(*r); \
264 /* If quiet, don't output paths in ld.so.conf */ \ 452 /* If quiet, don't output paths in ld.so.conf */ \
265 if (be_quiet) { \ 453 if (be_quiet) { \
266 size_t len; \ 454 size_t len; \
267 char *start, *end; \ 455 char *start, *end; \
268 for (s = 0; *r && ldpaths[s]; ++s) { \ 456 /* note that we only 'chop' off leading known paths. */ \
457 /* since *r is read-only memory, we can only move the ptr forward. */ \
458 start = *r; \
269 /* scan each path in : delimited list */ \ 459 /* scan each path in : delimited list */ \
270 start = *r; \ 460 while (start) { \
461 rpath_security_checks(elf, start, get_elfdtype(word)); \
271 end = strchr(start, ':'); \ 462 end = strchr(start, ':'); \
272 while ((start && ((end = strchr(start, ':')) != NULL)) || start) { \
273 len = (end ? abs(end - start) : strlen(start)); \ 463 len = (end ? abs(end - start) : strlen(start)); \
464 if (use_ldcache) \
465 for (s = 0; ldpaths[s]; ++s) \
274 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 466 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
275 *r = (end ? end + 1 : NULL); \ 467 *r = end; \
468 /* corner case ... if RPATH reads "/usr/lib:", we want \
469 * to show ':' rather than '' */ \
470 if (end && end[1] != '\0') \
471 (*r)++; \
276 break; \ 472 break; \
277 } \ 473 } \
474 if (!*r || !end) \
475 break; \
476 else \
278 start = (end ? start + len + 1 : NULL); \ 477 start = start + len + 1; \
279 } \
280 } \ 478 } \
281 } \ 479 } \
480 if (*r) { \
481 if (fix_elf > 2 || (fix_elf && **r == '\0')) { \
482 /* just nuke it */ \
483 nuke_it##B: \
484 memset(*r, 0x00, offset); \
485 *r = NULL; \
486 ESET(dyn->d_tag, DT_DEBUG); \
487 ESET(dyn->d_un.d_ptr, 0); \
488 } else if (fix_elf) { \
489 /* try to clean "bad" paths */ \
490 size_t len, tmpdir_len; \
491 char *start, *end; \
492 const char *tmpdir; \
493 start = *r; \
494 tmpdir = (getenv("TMPDIR") ? : "."); \
495 tmpdir_len = strlen(tmpdir); \
496 while (1) { \
497 end = strchr(start, ':'); \
498 if (start == end) { \
499 eat_this_path##B: \
500 len = strlen(end); \
501 memmove(start, end+1, len); \
502 start[len-1] = '\0'; \
503 end = start - 1; \
504 } else if (tmpdir && !strncmp(start, tmpdir, tmpdir_len)) { \
505 if (!end) { \
506 if (start == *r) \
507 goto nuke_it##B; \
508 *--start = '\0'; \
509 } else \
510 goto eat_this_path##B; \
511 } \
512 if (!end) \
513 break; \
514 start = end + 1; \
515 } \
516 if (**r == '\0') \
517 goto nuke_it##B; \
518 } \
519 if (*r) \
282 if (*r) *found_rpath = 1; \ 520 *found_rpath = 1; \
521 } \
283 } \ 522 } \
284 ++dyn; \ 523 ++dyn; \
285 } \ 524 } \
286 } } 525 } }
287 SHOW_RPATH(32) 526 SHOW_RPATH(32)
304 } else if (rpath || runpath) 543 } else if (rpath || runpath)
305 xstrcat(ret, (runpath ? runpath : rpath), ret_len); 544 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
306 else if (!be_quiet) 545 else if (!be_quiet)
307 xstrcat(ret, " - ", ret_len); 546 xstrcat(ret, " - ", ret_len);
308} 547}
548
549#define LDSO_CACHE_MAGIC "ld.so-"
550#define LDSO_CACHE_MAGIC_LEN (sizeof LDSO_CACHE_MAGIC -1)
551#define LDSO_CACHE_VER "1.7.0"
552#define LDSO_CACHE_VER_LEN (sizeof LDSO_CACHE_VER -1)
553#define FLAG_ANY -1
554#define FLAG_TYPE_MASK 0x00ff
555#define FLAG_LIBC4 0x0000
556#define FLAG_ELF 0x0001
557#define FLAG_ELF_LIBC5 0x0002
558#define FLAG_ELF_LIBC6 0x0003
559#define FLAG_REQUIRED_MASK 0xff00
560#define FLAG_SPARC_LIB64 0x0100
561#define FLAG_IA64_LIB64 0x0200
562#define FLAG_X8664_LIB64 0x0300
563#define FLAG_S390_LIB64 0x0400
564#define FLAG_POWERPC_LIB64 0x0500
565#define FLAG_MIPS64_LIBN32 0x0600
566#define FLAG_MIPS64_LIBN64 0x0700
567
568static char *lookup_cache_lib(elfobj *, char *);
569static char *lookup_cache_lib(elfobj *elf, char *fname)
570{
571 int fd = 0;
572 char *strs;
573 static char buf[__PAX_UTILS_PATH_MAX] = "";
574 const char *cachefile = "/etc/ld.so.cache";
575 struct stat st;
576
577 typedef struct {
578 char magic[LDSO_CACHE_MAGIC_LEN];
579 char version[LDSO_CACHE_VER_LEN];
580 int nlibs;
581 } header_t;
582 header_t *header;
583
584 typedef struct {
585 int flags;
586 int sooffset;
587 int liboffset;
588 } libentry_t;
589 libentry_t *libent;
590
591 if (fname == NULL)
592 return NULL;
593
594 if (ldcache == 0) {
595 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1)
596 return NULL;
597
598 /* cache these values so we only map/unmap the cache file once */
599 ldcache_size = st.st_size;
600 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
601
602 close(fd);
603
604 if (ldcache == (caddr_t)-1) {
605 ldcache = 0;
606 return NULL;
607 }
608
609 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN))
610 return NULL;
611 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
612 return NULL;
613 }
614
615 header = (header_t *) ldcache;
616 libent = (libentry_t *) (ldcache + sizeof(header_t));
617 strs = (char *) &libent[header->nlibs];
618
619 for (fd = 0; fd < header->nlibs; fd++) {
620 /* this should be more fine grained, but for now we assume that
621 * diff arches will not be cached together. and we ignore the
622 * the different multilib mips cases. */
623 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
624 continue;
625 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
626 continue;
627
628 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
629 continue;
630 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
631 }
632 return buf;
633}
634
635
309static void scanelf_file_needed(elfobj *elf, char *found_needed, char **ret, size_t *ret_len) 636static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
310{ 637{
311 unsigned long i; 638 unsigned long i;
312 char *needed; 639 char *needed;
313 void *strtbl_void; 640 void *strtbl_void;
641 char *p;
314 642
315 if (!show_needed) return; 643 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
316 644
317 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 645 strtbl_void = elf_findsecbyname(elf, ".dynstr");
318 646
319 if (elf->phdr && strtbl_void) { 647 if (elf->phdr && strtbl_void) {
320#define SHOW_NEEDED(B) \ 648#define SHOW_NEEDED(B) \
335 if (offset >= (Elf ## B ## _Off)elf->len) { \ 663 if (offset >= (Elf ## B ## _Off)elf->len) { \
336 ++dyn; \ 664 ++dyn; \
337 continue; \ 665 continue; \
338 } \ 666 } \
339 needed = (char*)(elf->data + offset); \ 667 needed = (char*)(elf->data + offset); \
668 if (op == 0) { \
669 if (!be_wewy_wewy_quiet) { \
340 if (*found_needed) xchrcat(ret, ',', ret_len); \ 670 if (*found_needed) xchrcat(ret, ',', ret_len); \
341 if (!be_wewy_wewy_quiet) xstrcat(ret, needed, ret_len); \ 671 if (use_ldcache) \
672 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
673 needed = p; \
674 xstrcat(ret, needed, ret_len); \
675 } \
342 *found_needed = 1; \ 676 *found_needed = 1; \
677 } else { \
678 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \
679 *found_lib = 1; \
680 return (be_wewy_wewy_quiet ? NULL : needed); \
681 } \
682 } \
343 } \ 683 } \
344 ++dyn; \ 684 ++dyn; \
345 } \ 685 } \
346 } } 686 } }
347 SHOW_NEEDED(32) 687 SHOW_NEEDED(32)
348 SHOW_NEEDED(64) 688 SHOW_NEEDED(64)
689 if (op == 0 && !*found_needed && be_verbose)
690 warn("ELF lacks DT_NEEDED sections: %s", elf->filename);
349 } 691 }
692
693 return NULL;
350} 694}
351static char *scanelf_file_interp(elfobj *elf, char *found_interp) 695static char *scanelf_file_interp(elfobj *elf, char *found_interp)
352{ 696{
353 void *strtbl_void; 697 void *strtbl_void;
354 698
409 } else { 753 } else {
410 *found_bind = 1; 754 *found_bind = 1;
411 return (char *) "LAZY"; 755 return (char *) "LAZY";
412 } 756 }
413} 757}
414static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename) 758static char *scanelf_file_soname(elfobj *elf, char *found_soname)
415{ 759{
416 unsigned long i; 760 unsigned long i;
761 char *soname;
762 void *strtbl_void;
763
764 if (!show_soname) return NULL;
765
766 strtbl_void = elf_findsecbyname(elf, ".dynstr");
767
768 if (elf->phdr && strtbl_void) {
769#define SHOW_SONAME(B) \
770 if (elf->elf_class == ELFCLASS ## B) { \
771 Elf ## B ## _Dyn *dyn; \
772 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
773 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
774 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
775 Elf ## B ## _Off offset; \
776 /* only look for soname in shared objects */ \
777 if (ehdr->e_type != ET_DYN) \
778 return NULL; \
779 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
780 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
781 offset = EGET(phdr[i].p_offset); \
782 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
783 dyn = DYN ## B (elf->data + offset); \
784 while (EGET(dyn->d_tag) != DT_NULL) { \
785 if (EGET(dyn->d_tag) == DT_SONAME) { \
786 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
787 if (offset >= (Elf ## B ## _Off)elf->len) { \
788 ++dyn; \
789 continue; \
790 } \
791 soname = (char*)(elf->data + offset); \
792 *found_soname = 1; \
793 return (be_wewy_wewy_quiet ? NULL : soname); \
794 } \
795 ++dyn; \
796 } \
797 } }
798 SHOW_SONAME(32)
799 SHOW_SONAME(64)
800 }
801
802 return NULL;
803}
804static char *scanelf_file_sym(elfobj *elf, char *found_sym)
805{
806 unsigned long i;
807 char *ret;
417 void *symtab_void, *strtab_void; 808 void *symtab_void, *strtab_void;
418 809
419 if (!find_sym) return NULL; 810 if (!find_sym) return NULL;
811 ret = find_sym;
420 812
421 /* debug sections */ 813 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
422 symtab_void = elf_findsecbyname(elf, ".symtab");
423 strtab_void = elf_findsecbyname(elf, ".strtab");
424 /* fall back to runtime sections */
425 if (!symtab_void || !strtab_void) {
426 symtab_void = elf_findsecbyname(elf, ".dynsym");
427 strtab_void = elf_findsecbyname(elf, ".dynstr");
428 }
429 814
430 if (symtab_void && strtab_void) { 815 if (symtab_void && strtab_void) {
431 char *base, *basemem;
432 basemem = xstrdup(filename);
433 base = basename(basemem);
434#define FIND_SYM(B) \ 816#define FIND_SYM(B) \
435 if (elf->elf_class == ELFCLASS ## B) { \ 817 if (elf->elf_class == ELFCLASS ## B) { \
436 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 818 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
437 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 819 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
438 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 820 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
439 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 821 unsigned long cnt = EGET(symtab->sh_entsize); \
440 char *symname; \ 822 char *symname; \
823 if (cnt) \
824 cnt = EGET(symtab->sh_size) / cnt; \
441 for (i = 0; i < cnt; ++i) { \ 825 for (i = 0; i < cnt; ++i) { \
442 if (sym->st_name) { \ 826 if (sym->st_name) { \
443 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 827 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
828 if ((void*)symname > (void*)elf->data_end) { \
829 warnf("%s: corrupt ELF symbols", elf->filename); \
830 continue; \
831 } \
444 if (*find_sym == '*') { \ 832 if (*find_sym == '*') { \
445 printf("%s(%s) %5lX %15s %s\n", \ 833 printf("%s(%s) %5lX %15s %s\n", \
446 ((*found_sym == 0) ? "\n\t" : "\t"), \ 834 ((*found_sym == 0) ? "\n\t" : "\t"), \
447 base, \ 835 elf->base_filename, \
448 (long)sym->st_size, \ 836 (unsigned long)sym->st_size, \
449 (char *)get_elfstttype(sym->st_info), \ 837 get_elfstttype(sym->st_info), \
450 symname); \ 838 symname); \
451 *found_sym = 1; \ 839 *found_sym = 1; \
452 } else if ((strcmp(find_sym, symname) == 0) || \ 840 } else { \
841 char *this_sym, *next_sym; \
842 this_sym = find_sym; \
843 do { \
844 next_sym = strchr(this_sym, ','); \
845 if (next_sym == NULL) \
846 next_sym = this_sym + strlen(this_sym); \
847 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
453 (strcmp(symname, versioned_symname) == 0)) \ 848 (strcmp(symname, versioned_symname) == 0)) { \
849 ret = this_sym; \
454 (*found_sym)++; \ 850 (*found_sym)++; \
851 goto break_out; \
852 } \
853 this_sym = next_sym + 1; \
854 } while (*next_sym != '\0'); \
855 } \
455 } \ 856 } \
456 ++sym; \ 857 ++sym; \
457 } } 858 } }
458 FIND_SYM(32) 859 FIND_SYM(32)
459 FIND_SYM(64) 860 FIND_SYM(64)
460 free(basemem);
461 } 861 }
462 862
863break_out:
463 if (be_wewy_wewy_quiet) return NULL; 864 if (be_wewy_wewy_quiet) return NULL;
464 865
465 if (*find_sym != '*' && *found_sym) 866 if (*find_sym != '*' && *found_sym)
466 return find_sym; 867 return ret;
467 if (be_quiet) 868 if (be_quiet)
468 return NULL; 869 return NULL;
469 else 870 else
470 return (char *)" - "; 871 return (char *)" - ";
471} 872}
873
874
472/* scan an elf file and show all the fun stuff */ 875/* scan an elf file and show all the fun stuff */
473#define prints(str) write(fileno(stdout), str, strlen(str)) 876#define prints(str) write(fileno(stdout), str, strlen(str))
474static void scanelf_file(const char *filename) 877static int scanelf_elfobj(elfobj *elf)
475{ 878{
476 unsigned long i; 879 unsigned long i;
477 char found_pax, found_stack, found_relro, found_load, found_textrel, 880 char found_pax, found_phdr, found_relro, found_load, found_textrel,
478 found_rpath, found_needed, found_interp, found_bind, 881 found_rpath, found_needed, found_interp, found_bind, found_soname,
479 found_sym, found_file; 882 found_sym, found_lib, found_file, found_textrels;
480 elfobj *elf;
481 struct stat st;
482 static char *out_buffer = NULL; 883 static char *out_buffer = NULL;
483 static size_t out_len; 884 static size_t out_len;
484 885
485 /* make sure 'filename' exists */
486 if (lstat(filename, &st) == -1) {
487 if (be_verbose > 2) printf("%s: does not exist\n", filename);
488 return;
489 }
490 /* always handle regular files and handle symlinked files if no -y */
491 if (S_ISLNK(st.st_mode)) {
492 if (!scan_symlink) return;
493 stat(filename, &st);
494 }
495 if (!S_ISREG(st.st_mode)) {
496 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
497 return;
498 }
499
500 found_pax = found_stack = found_relro = found_load = \ 886 found_pax = found_phdr = found_relro = found_load = found_textrel = \
501 found_textrel = found_rpath = found_needed = found_interp = \ 887 found_rpath = found_needed = found_interp = found_bind = found_soname = \
502 found_bind = found_sym = found_file = 0; 888 found_sym = found_lib = found_file = found_textrels = 0;
503 889
504 /* verify this is real ELF */
505 if ((elf = readelf(filename)) == NULL) {
506 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
507 return;
508 }
509
510 if (be_verbose > 1) 890 if (be_verbose > 2)
511 printf("%s: scanning file {%s,%s}\n", filename, 891 printf("%s: scanning file {%s,%s}\n", elf->filename,
512 get_elfeitype(EI_CLASS, elf->elf_class), 892 get_elfeitype(EI_CLASS, elf->elf_class),
513 get_elfeitype(EI_DATA, elf->data[EI_DATA])); 893 get_elfeitype(EI_DATA, elf->data[EI_DATA]));
514 else if (be_verbose) 894 else if (be_verbose > 1)
515 printf("%s: scanning file\n", filename); 895 printf("%s: scanning file\n", elf->filename);
516 896
517 /* init output buffer */ 897 /* init output buffer */
518 if (!out_buffer) { 898 if (!out_buffer) {
519 out_len = sizeof(char) * 80; 899 out_len = sizeof(char) * 80;
520 out_buffer = (char*)xmalloc(out_len); 900 out_buffer = (char*)xmalloc(out_len);
538 case 't': prints("TEXTREL "); break; 918 case 't': prints("TEXTREL "); break;
539 case 'r': prints("RPATH "); break; 919 case 'r': prints("RPATH "); break;
540 case 'n': prints("NEEDED "); break; 920 case 'n': prints("NEEDED "); break;
541 case 'i': prints("INTERP "); break; 921 case 'i': prints("INTERP "); break;
542 case 'b': prints("BIND "); break; 922 case 'b': prints("BIND "); break;
923 case 'S': prints("SONAME "); break;
543 case 's': prints("SYM "); break; 924 case 's': prints("SYM "); break;
925 case 'N': prints("LIB "); break;
926 case 'T': prints("TEXTRELS "); break;
927 default: warnf("'%c' has no title ?", out_format[i]);
544 } 928 }
545 } 929 }
546 if (!found_file) prints("FILE "); 930 if (!found_file) prints("FILE ");
547 prints("\n"); 931 prints("\n");
548 found_file = 0; 932 found_file = 0;
568 switch (out_format[++i]) { 952 switch (out_format[++i]) {
569 case '%': 953 case '%':
570 case '#': 954 case '#':
571 xchrcat(&out_buffer, out_format[i], &out_len); break; 955 xchrcat(&out_buffer, out_format[i], &out_len); break;
572 case 'F': 956 case 'F':
957 found_file = 1;
573 if (be_wewy_wewy_quiet) break; 958 if (be_wewy_wewy_quiet) break;
574 found_file = 1;
575 xstrcat(&out_buffer, filename, &out_len); 959 xstrcat(&out_buffer, elf->filename, &out_len);
576 break; 960 break;
577 case 'p': 961 case 'p':
962 found_file = 1;
578 if (be_wewy_wewy_quiet) break; 963 if (be_wewy_wewy_quiet) break;
579 found_file = 1;
580 tmp = filename; 964 tmp = elf->filename;
581 if (search_path) { 965 if (search_path) {
582 ssize_t len_search = strlen(search_path); 966 ssize_t len_search = strlen(search_path);
583 ssize_t len_file = strlen(filename); 967 ssize_t len_file = strlen(elf->filename);
584 if (!strncmp(filename, search_path, len_search) && \ 968 if (!strncmp(elf->filename, search_path, len_search) && \
585 len_file > len_search) 969 len_file > len_search)
586 tmp += len_search; 970 tmp += len_search;
587 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++; 971 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
588 } 972 }
589 xstrcat(&out_buffer, tmp, &out_len); 973 xstrcat(&out_buffer, tmp, &out_len);
590 break; 974 break;
591 case 'f': 975 case 'f':
976 found_file = 1;
592 if (be_wewy_wewy_quiet) break; 977 if (be_wewy_wewy_quiet) break;
593 found_file = 1;
594 tmp = strrchr(filename, '/'); 978 tmp = strrchr(elf->filename, '/');
595 tmp = (tmp == NULL ? filename : tmp+1); 979 tmp = (tmp == NULL ? elf->filename : tmp+1);
596 xstrcat(&out_buffer, tmp, &out_len); 980 xstrcat(&out_buffer, tmp, &out_len);
597 break; 981 break;
598 case 'o': out = get_elfetype(elf); break; 982 case 'o': out = get_elfetype(elf); break;
599 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 983 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
600 case 'e': out = scanelf_file_stack(elf, &found_stack, &found_relro, &found_load); break; 984 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
601 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 985 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
986 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
602 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 987 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
988 case 'n':
603 case 'n': scanelf_file_needed(elf, &found_needed, &out_buffer, &out_len); break; 989 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
604 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 990 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
605 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 991 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
992 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
606 case 's': out = scanelf_file_sym(elf, &found_sym, filename); break; 993 case 's': out = scanelf_file_sym(elf, &found_sym); break;
994 default: warnf("'%c' has no scan code?", out_format[i]);
607 } 995 }
996 if (out) {
997 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
998 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
999 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1000 else
608 if (out) xstrcat(&out_buffer, out, &out_len); 1001 xstrcat(&out_buffer, out, &out_len);
1002 }
609 } 1003 }
610 1004
611#define FOUND_SOMETHING() \ 1005#define FOUND_SOMETHING() \
612 (found_pax || found_stack || found_relro || found_load || found_textrel || \ 1006 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
613 found_rpath || found_needed || found_interp || found_bind || found_sym) 1007 found_rpath || found_needed || found_interp || found_bind || \
1008 found_soname || found_sym || found_lib || found_textrels)
614 1009
615 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { 1010 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
616 xchrcat(&out_buffer, ' ', &out_len); 1011 xchrcat(&out_buffer, ' ', &out_len);
617 xstrcat(&out_buffer, filename, &out_len); 1012 xstrcat(&out_buffer, elf->filename, &out_len);
618 } 1013 }
619 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) 1014 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
620 puts(out_buffer); 1015 puts(out_buffer);
1016 fflush(stdout);
1017 }
621 1018
1019 return 0;
1020}
1021
1022/* scan a single elf */
1023static int scanelf_elf(const char *filename, int fd, size_t len)
1024{
1025 int ret;
1026 elfobj *elf;
1027
1028 /* verify this is real ELF */
1029 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1030 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1031 return 1;
1032 }
1033
1034 if (strlen(match_etypes)) {
1035 char sbuf[126];
1036 strncpy(sbuf, match_etypes, sizeof(sbuf));
1037 if (strchr(match_etypes, ',') != NULL) {
1038 char *p;
1039 while((p = strrchr(sbuf, ',')) != NULL) {
1040 *p = 0;
1041 if (atoi(p+1) == get_etype(elf))
1042 goto label_ret;
1043 }
1044 }
1045 if (atoi(sbuf) != get_etype(elf)) {
1046 ret = 1;
1047 goto label_done;
1048 }
1049 }
1050
1051label_ret:
1052 ret = scanelf_elfobj(elf);
1053
1054label_done:
622 unreadelf(elf); 1055 unreadelf(elf);
1056 return ret;
1057}
1058
1059/* scan an archive of elfs */
1060static int scanelf_archive(const char *filename, int fd, size_t len)
1061{
1062 archive_handle *ar;
1063 archive_member *m;
1064 char *ar_buffer;
1065 elfobj *elf;
1066
1067 ar = ar_open_fd(filename, fd);
1068 if (ar == NULL)
1069 return 1;
1070
1071 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1072 while ((m=ar_next(ar)) != NULL) {
1073 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1074 if (elf) {
1075 scanelf_elfobj(elf);
1076 unreadelf(elf);
1077 }
1078 }
1079 munmap(ar_buffer, len);
1080
1081 return 0;
1082}
1083/* scan a file which may be an elf or an archive or some other magical beast */
1084static void scanelf_file(const char *filename)
1085{
1086 struct stat st;
1087 int fd;
1088
1089 /* make sure 'filename' exists */
1090 if (lstat(filename, &st) == -1) {
1091 if (be_verbose > 2) printf("%s: does not exist\n", filename);
1092 return;
1093 }
1094
1095 /* always handle regular files and handle symlinked files if no -y */
1096 if (S_ISLNK(st.st_mode)) {
1097 if (!scan_symlink) return;
1098 stat(filename, &st);
1099 }
1100 if (!S_ISREG(st.st_mode)) {
1101 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1102 return;
1103 }
1104
1105 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1106 return;
1107
1108 if (scanelf_elf(filename, fd, st.st_size) == 1 && scan_archives)
1109 /* if it isn't an ELF, maybe it's an .a archive */
1110 scanelf_archive(filename, fd, st.st_size);
1111
1112 close(fd);
623} 1113}
624 1114
625/* scan a directory for ET_EXEC files and print when we find one */ 1115/* scan a directory for ET_EXEC files and print when we find one */
626static void scanelf_dir(const char *path) 1116static void scanelf_dir(const char *path)
627{ 1117{
628 register DIR *dir; 1118 register DIR *dir;
629 register struct dirent *dentry; 1119 register struct dirent *dentry;
630 struct stat st_top, st; 1120 struct stat st_top, st;
631 char buf[_POSIX_PATH_MAX]; 1121 char buf[__PAX_UTILS_PATH_MAX];
632 size_t pathlen = 0, len = 0; 1122 size_t pathlen = 0, len = 0;
633 1123
634 /* make sure path exists */ 1124 /* make sure path exists */
635 if (lstat(path, &st_top) == -1) { 1125 if (lstat(path, &st_top) == -1) {
636 if (be_verbose > 2) printf("%s: does not exist\n", path); 1126 if (be_verbose > 2) printf("%s: does not exist\n", path);
646 /* now scan the dir looking for fun stuff */ 1136 /* now scan the dir looking for fun stuff */
647 if ((dir = opendir(path)) == NULL) { 1137 if ((dir = opendir(path)) == NULL) {
648 warnf("could not opendir %s: %s", path, strerror(errno)); 1138 warnf("could not opendir %s: %s", path, strerror(errno));
649 return; 1139 return;
650 } 1140 }
651 if (be_verbose) printf("%s: scanning dir\n", path); 1141 if (be_verbose > 1) printf("%s: scanning dir\n", path);
652 1142
653 pathlen = strlen(path); 1143 pathlen = strlen(path);
654 while ((dentry = readdir(dir))) { 1144 while ((dentry = readdir(dir))) {
655 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 1145 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
656 continue; 1146 continue;
657 len = (pathlen + 1 + strlen(dentry->d_name) + 1); 1147 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
658 if (len >= sizeof(buf)) { 1148 if (len >= sizeof(buf)) {
659 warnf("Skipping '%s': len > sizeof(buf); %d > %d\n", path, (int)len, (int)sizeof(buf)); 1149 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1150 (unsigned long)len, (unsigned long)sizeof(buf));
660 continue; 1151 continue;
661 } 1152 }
662 sprintf(buf, "%s/%s", path, dentry->d_name); 1153 sprintf(buf, "%s/%s", path, dentry->d_name);
663 if (lstat(buf, &st) != -1) { 1154 if (lstat(buf, &st) != -1) {
664 if (S_ISREG(st.st_mode)) 1155 if (S_ISREG(st.st_mode))
674 1165
675static int scanelf_from_file(char *filename) 1166static int scanelf_from_file(char *filename)
676{ 1167{
677 FILE *fp = NULL; 1168 FILE *fp = NULL;
678 char *p; 1169 char *p;
679 char path[_POSIX_PATH_MAX]; 1170 char path[__PAX_UTILS_PATH_MAX];
680 1171
681 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) 1172 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL))
682 fp = stdin; 1173 fp = stdin;
683 else if ((fp = fopen(filename, "r")) == NULL) 1174 else if ((fp = fopen(filename, "r")) == NULL)
684 return 1; 1175 return 1;
685 1176
686 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1177 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
687 if ((p = strchr(path, '\n')) != NULL) 1178 if ((p = strchr(path, '\n')) != NULL)
688 *p = 0; 1179 *p = 0;
689 search_path = path; 1180 search_path = path;
690 scanelf_dir(path); 1181 scanelf_dir(path);
691 } 1182 }
696 1187
697static void load_ld_so_conf() 1188static void load_ld_so_conf()
698{ 1189{
699 FILE *fp = NULL; 1190 FILE *fp = NULL;
700 char *p; 1191 char *p;
701 char path[_POSIX_PATH_MAX]; 1192 char path[__PAX_UTILS_PATH_MAX];
702 int i = 0; 1193 int i = 0;
703 1194
704 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 1195 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
705 return; 1196 return;
706 1197
707 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1198 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
708 if (*path != '/') 1199 if (*path != '/')
709 continue; 1200 continue;
710 1201
711 if ((p = strrchr(path, '\r')) != NULL) 1202 if ((p = strrchr(path, '\r')) != NULL)
712 *p = 0; 1203 *p = 0;
764 1255
765 free(path); 1256 free(path);
766} 1257}
767 1258
768 1259
769
770/* usage / invocation handling functions */ 1260/* usage / invocation handling functions */
771#define PARSE_FLAGS "plRmyxetrnibs:aqvF:f:o:BhV" 1261#define PARSE_FLAGS "plRmyAXxetrnLibSs:gN:TaqvF:f:o:E:BhV"
772#define a_argument required_argument 1262#define a_argument required_argument
773static struct option const long_opts[] = { 1263static struct option const long_opts[] = {
774 {"path", no_argument, NULL, 'p'}, 1264 {"path", no_argument, NULL, 'p'},
775 {"ldpath", no_argument, NULL, 'l'}, 1265 {"ldpath", no_argument, NULL, 'l'},
776 {"recursive", no_argument, NULL, 'R'}, 1266 {"recursive", no_argument, NULL, 'R'},
777 {"mount", no_argument, NULL, 'm'}, 1267 {"mount", no_argument, NULL, 'm'},
778 {"symlink", no_argument, NULL, 'y'}, 1268 {"symlink", no_argument, NULL, 'y'},
1269 {"archives", no_argument, NULL, 'A'},
1270 {"ldcache", no_argument, NULL, 'L'},
1271 {"fix", no_argument, NULL, 'X'},
779 {"pax", no_argument, NULL, 'x'}, 1272 {"pax", no_argument, NULL, 'x'},
780 {"header", no_argument, NULL, 'e'}, 1273 {"header", no_argument, NULL, 'e'},
781 {"textrel", no_argument, NULL, 't'}, 1274 {"textrel", no_argument, NULL, 't'},
782 {"rpath", no_argument, NULL, 'r'}, 1275 {"rpath", no_argument, NULL, 'r'},
783 {"needed", no_argument, NULL, 'n'}, 1276 {"needed", no_argument, NULL, 'n'},
784 {"interp", no_argument, NULL, 'i'}, 1277 {"interp", no_argument, NULL, 'i'},
785 {"bind", no_argument, NULL, 'b'}, 1278 {"bind", no_argument, NULL, 'b'},
1279 {"soname", no_argument, NULL, 'S'},
786 {"symbol", a_argument, NULL, 's'}, 1280 {"symbol", a_argument, NULL, 's'},
1281 {"lib", a_argument, NULL, 'N'},
1282 {"gmatch", no_argument, NULL, 'g'},
1283 {"textrels", no_argument, NULL, 'T'},
1284 {"etype", a_argument, NULL, 'E'},
787 {"all", no_argument, NULL, 'a'}, 1285 {"all", no_argument, NULL, 'a'},
788 {"quiet", no_argument, NULL, 'q'}, 1286 {"quiet", no_argument, NULL, 'q'},
789 {"verbose", no_argument, NULL, 'v'}, 1287 {"verbose", no_argument, NULL, 'v'},
790 {"format", a_argument, NULL, 'F'}, 1288 {"format", a_argument, NULL, 'F'},
791 {"from", a_argument, NULL, 'f'}, 1289 {"from", a_argument, NULL, 'f'},
792 {"file", a_argument, NULL, 'o'}, 1290 {"file", a_argument, NULL, 'o'},
793 {"nobanner", no_argument, NULL, 'B'}, 1291 {"nobanner", no_argument, NULL, 'B'},
794 {"help", no_argument, NULL, 'h'}, 1292 {"help", no_argument, NULL, 'h'},
795 {"version", no_argument, NULL, 'V'}, 1293 {"version", no_argument, NULL, 'V'},
796 {NULL, no_argument, NULL, 0x0} 1294 {NULL, no_argument, NULL, 0x0}
797}; 1295};
799static const char *opts_help[] = { 1297static const char *opts_help[] = {
800 "Scan all directories in PATH environment", 1298 "Scan all directories in PATH environment",
801 "Scan all directories in /etc/ld.so.conf", 1299 "Scan all directories in /etc/ld.so.conf",
802 "Scan directories recursively", 1300 "Scan directories recursively",
803 "Don't recursively cross mount points", 1301 "Don't recursively cross mount points",
804 "Don't scan symlinks\n", 1302 "Don't scan symlinks",
1303 "Scan archives (.a files)",
1304 "Utilize ld.so.cache information (use with -r/-n)",
1305 "Try and 'fix' bad things (use with -r/-e)\n",
805 "Print PaX markings", 1306 "Print PaX markings",
806 "Print GNU_STACK/PT_LOAD markings", 1307 "Print GNU_STACK/PT_LOAD markings",
807 "Print TEXTREL information", 1308 "Print TEXTREL information",
808 "Print RPATH information", 1309 "Print RPATH information",
809 "Print NEEDED information", 1310 "Print NEEDED information",
810 "Print INTERP information", 1311 "Print INTERP information",
811 "Print BIND information", 1312 "Print BIND information",
1313 "Print SONAME information",
812 "Find a specified symbol", 1314 "Find a specified symbol",
1315 "Find a specified library",
1316 "Use strncmp to match libraries. (use with -N)",
1317 "Locate cause of TEXTREL",
1318 "Print only ELF files matching numeric constant",
813 "Print all scanned info (-x -e -t -r -n -i -b)\n", 1319 "Print all scanned info (-x -e -t -r -b)\n",
814 "Only output 'bad' things", 1320 "Only output 'bad' things",
815 "Be verbose (can be specified more than once)", 1321 "Be verbose (can be specified more than once)",
816 "Use specified format for output", 1322 "Use specified format for output",
817 "Read input stream from a filename", 1323 "Read input stream from a filename",
818 "Write output stream to a filename", 1324 "Write output stream to a filename",
825/* display usage and exit */ 1331/* display usage and exit */
826static void usage(int status) 1332static void usage(int status)
827{ 1333{
828 unsigned long i; 1334 unsigned long i;
829 printf("* Scan ELF binaries for stuff\n\n" 1335 printf("* Scan ELF binaries for stuff\n\n"
830 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 1336 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
831 printf("Options: -[%s]\n", PARSE_FLAGS); 1337 printf("Options: -[%s]\n", PARSE_FLAGS);
832 for (i = 0; long_opts[i].name; ++i) 1338 for (i = 0; long_opts[i].name; ++i)
833 if (long_opts[i].has_arg == no_argument) 1339 if (long_opts[i].has_arg == no_argument)
834 printf(" -%c, --%-13s* %s\n", long_opts[i].val, 1340 printf(" -%c, --%-13s* %s\n", long_opts[i].val,
835 long_opts[i].name, opts_help[i]); 1341 long_opts[i].name, opts_help[i]);
842 1348
843 puts("\nThe format modifiers for the -F option are:"); 1349 puts("\nThe format modifiers for the -F option are:");
844 puts(" F Filename \tx PaX Flags \te STACK/RELRO"); 1350 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
845 puts(" t TEXTREL \tr RPATH \tn NEEDED"); 1351 puts(" t TEXTREL \tr RPATH \tn NEEDED");
846 puts(" i INTERP \tb BIND \ts symbol"); 1352 puts(" i INTERP \tb BIND \ts symbol");
1353 puts(" N library \to Type \tT TEXTRELs");
1354 puts(" S SONAME");
847 puts(" p filename (with search path removed)"); 1355 puts(" p filename (with search path removed)");
848 puts(" f base filename"); 1356 puts(" f filename (short name/basename)");
849 puts("Prefix each modifier with '%' (verbose) or '#' (silent)"); 1357 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
850 1358
851 exit(status); 1359 exit(status);
852} 1360}
853 1361
860 opterr = 0; 1368 opterr = 0;
861 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 1369 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
862 switch (i) { 1370 switch (i) {
863 1371
864 case 'V': 1372 case 'V':
865 printf("%s compiled %s\n%s\n" 1373 printf("pax-utils-%s: %s compiled %s\n%s\n"
866 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 1374 "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
867 __FILE__, __DATE__, rcsid, argv0); 1375 VERSION, __FILE__, __DATE__, rcsid, argv0);
868 exit(EXIT_SUCCESS); 1376 exit(EXIT_SUCCESS);
869 break; 1377 break;
870 case 'h': usage(EXIT_SUCCESS); break; 1378 case 'h': usage(EXIT_SUCCESS); break;
871 case 'f': 1379 case 'f':
872 if (from_file) err("Don't specify -f twice"); 1380 if (from_file) warn("You prob don't want to specify -f twice");
873 from_file = xstrdup(optarg); 1381 from_file = optarg;
1382 break;
1383 case 'E':
1384 strncpy(match_etypes, optarg, sizeof(match_etypes));
874 break; 1385 break;
875 case 'o': { 1386 case 'o': {
876 FILE *fp = NULL; 1387 FILE *fp = NULL;
877 if ((fp = freopen(optarg, "w", stdout)) == NULL) 1388 if ((fp = freopen(optarg, "w", stdout)) == NULL)
878 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1389 err("Could not open output stream '%s': %s", optarg, strerror(errno));
879 SET_STDOUT(fp); 1390 SET_STDOUT(fp);
880 break; 1391 break;
881 } 1392 }
882 1393
883 case 's': { 1394 case 's': {
884 size_t len;
885 if (find_sym) err("Don't specify -s twice"); 1395 if (find_sym) warn("You prob don't want to specify -s twice");
886 find_sym = xstrdup(optarg); 1396 find_sym = optarg;
887 len = strlen(find_sym) + 1;
888 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1)); 1397 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
889 sprintf(versioned_symname, "%s@", find_sym); 1398 sprintf(versioned_symname, "%s@", find_sym);
890 break; 1399 break;
891 } 1400 }
1401 case 'N': {
1402 if (find_lib) warn("You prob don't want to specify -N twice");
1403 find_lib = optarg;
1404 break;
1405 }
892 1406
893 case 'F': { 1407 case 'F': {
894 if (out_format) err("Don't specify -F twice"); 1408 if (out_format) warn("You prob don't want to specify -F twice");
895 out_format = xstrdup(optarg); 1409 out_format = optarg;
896 break; 1410 break;
897 } 1411 }
898 1412
1413 case 'g': gmatch = 1; /* break; any reason we dont breal; here ? */
1414 case 'L': use_ldcache = 1; break;
899 case 'y': scan_symlink = 0; break; 1415 case 'y': scan_symlink = 0; break;
1416 case 'A': scan_archives = 1; break;
900 case 'B': show_banner = 0; break; 1417 case 'B': show_banner = 0; break;
901 case 'l': scan_ldpath = 1; break; 1418 case 'l': scan_ldpath = 1; break;
902 case 'p': scan_envpath = 1; break; 1419 case 'p': scan_envpath = 1; break;
903 case 'R': dir_recurse = 1; break; 1420 case 'R': dir_recurse = 1; break;
904 case 'm': dir_crossmount = 0; break; 1421 case 'm': dir_crossmount = 0; break;
1422 case 'X': ++fix_elf; break;
905 case 'x': show_pax = 1; break; 1423 case 'x': show_pax = 1; break;
906 case 'e': show_stack = 1; break; 1424 case 'e': show_phdr = 1; break;
907 case 't': show_textrel = 1; break; 1425 case 't': show_textrel = 1; break;
908 case 'r': show_rpath = 1; break; 1426 case 'r': show_rpath = 1; break;
909 case 'n': show_needed = 1; break; 1427 case 'n': show_needed = 1; break;
910 case 'i': show_interp = 1; break; 1428 case 'i': show_interp = 1; break;
911 case 'b': show_bind = 1; break; 1429 case 'b': show_bind = 1; break;
1430 case 'S': show_soname = 1; break;
1431 case 'T': show_textrels = 1; break;
912 case 'q': be_quiet = 1; break; 1432 case 'q': be_quiet = 1; break;
913 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1433 case 'v': be_verbose = (be_verbose % 20) + 1; break;
914 case 'a': show_pax = show_stack = show_textrel = show_rpath = \ 1434 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break;
915 show_needed = show_interp = show_bind = 1; break;
916 1435
917 case ':': 1436 case ':':
918 err("Option missing parameter\n"); 1437 err("Option '%c' is missing parameter", optopt);
919 case '?': 1438 case '?':
920 err("Unknown option\n"); 1439 err("Unknown option '%c' or argument missing", optopt);
921 default: 1440 default:
922 err("Unhandled option '%c'", i); 1441 err("Unhandled option '%c'; please report this", i);
923 } 1442 }
924 } 1443 }
925 1444
926 /* let the format option override all other options */ 1445 /* let the format option override all other options */
927 if (out_format) { 1446 if (out_format) {
928 show_pax = show_stack = show_textrel = show_rpath = \ 1447 show_pax = show_phdr = show_textrel = show_rpath = \
929 show_needed = show_interp = show_bind = 0; 1448 show_needed = show_interp = show_bind = show_soname = \
1449 show_textrels = 0;
930 for (i = 0; out_format[i]; ++i) { 1450 for (i = 0; out_format[i]; ++i) {
931 if (!IS_MODIFIER(out_format[i])) continue; 1451 if (!IS_MODIFIER(out_format[i])) continue;
932 1452
933 switch (out_format[++i]) { 1453 switch (out_format[++i]) {
934 case '%': break; 1454 case '%': break;
935 case '#': break; 1455 case '#': break;
936 case 'F': break; 1456 case 'F': break;
937 case 'p': break; 1457 case 'p': break;
938 case 'f': break; 1458 case 'f': break;
939 case 's': break; 1459 case 's': break;
1460 case 'N': break;
940 case 'o': break; 1461 case 'o': break;
941 case 'x': show_pax = 1; break; 1462 case 'x': show_pax = 1; break;
942 case 'e': show_stack = 1; break; 1463 case 'e': show_phdr = 1; break;
943 case 't': show_textrel = 1; break; 1464 case 't': show_textrel = 1; break;
944 case 'r': show_rpath = 1; break; 1465 case 'r': show_rpath = 1; break;
945 case 'n': show_needed = 1; break; 1466 case 'n': show_needed = 1; break;
946 case 'i': show_interp = 1; break; 1467 case 'i': show_interp = 1; break;
947 case 'b': show_bind = 1; break; 1468 case 'b': show_bind = 1; break;
1469 case 'S': show_soname = 1; break;
1470 case 'T': show_textrels = 1; break;
948 default: 1471 default:
949 err("Invalid format specifier '%c' (byte %i)", 1472 err("Invalid format specifier '%c' (byte %i)",
950 out_format[i], i+1); 1473 out_format[i], i+1);
951 } 1474 }
952 } 1475 }
953 1476
954 /* construct our default format */ 1477 /* construct our default format */
955 } else { 1478 } else {
956 size_t fmt_len = 30; 1479 size_t fmt_len = 30;
957 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 1480 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
958 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 1481 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
959 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 1482 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
960 if (show_stack) xstrcat(&out_format, "%e ", &fmt_len); 1483 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
961 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 1484 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
962 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 1485 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
963 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 1486 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
964 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 1487 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
965 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len); 1488 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1489 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1490 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
966 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len); 1491 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1492 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
967 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 1493 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
968 } 1494 }
969 if (be_verbose > 2) printf("Format: %s\n", out_format); 1495 if (be_verbose > 2) printf("Format: %s\n", out_format);
970 1496
971 /* now lets actually do the scanning */ 1497 /* now lets actually do the scanning */
972 if (scan_ldpath || (show_rpath && be_quiet)) 1498 if (scan_ldpath || use_ldcache)
973 load_ld_so_conf(); 1499 load_ld_so_conf();
974 if (scan_ldpath) scanelf_ldpath(); 1500 if (scan_ldpath) scanelf_ldpath();
975 if (scan_envpath) scanelf_envpath(); 1501 if (scan_envpath) scanelf_envpath();
976 if (from_file) { 1502 if (from_file) {
977 scanelf_from_file(from_file); 1503 scanelf_from_file(from_file);
978 free(from_file);
979 from_file = *argv; 1504 from_file = *argv;
980 } 1505 }
981 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1506 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
982 err("Nothing to scan !?"); 1507 err("Nothing to scan !?");
983 while (optind < argc) { 1508 while (optind < argc) {
984 search_path = argv[optind++]; 1509 search_path = argv[optind++];
985 scanelf_dir(search_path); 1510 scanelf_dir(search_path);
986 } 1511 }
987 1512
988 /* clean up */ 1513 /* clean up */
989 if (find_sym) { 1514 if (versioned_symname) free(versioned_symname);
990 free(find_sym);
991 free(versioned_symname);
992 }
993 if (out_format) free(out_format);
994 for (i = 0; ldpaths[i]; ++i) 1515 for (i = 0; ldpaths[i]; ++i)
995 free(ldpaths[i]); 1516 free(ldpaths[i]);
1517
1518 if (ldcache != 0)
1519 munmap(ldcache, ldcache_size);
996} 1520}
997 1521
998 1522
999 1523
1000/* utility funcs */ 1524/* utility funcs */
1002{ 1526{
1003 char *ret = strdup(s); 1527 char *ret = strdup(s);
1004 if (!ret) err("Could not strdup(): %s", strerror(errno)); 1528 if (!ret) err("Could not strdup(): %s", strerror(errno));
1005 return ret; 1529 return ret;
1006} 1530}
1007
1008static void *xmalloc(size_t size) 1531static void *xmalloc(size_t size)
1009{ 1532{
1010 void *ret = malloc(size); 1533 void *ret = malloc(size);
1011 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size); 1534 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1012 return ret; 1535 return ret;
1013} 1536}
1014
1015static void xstrcat(char **dst, const char *src, size_t *curr_len) 1537static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1016{ 1538{
1017 size_t new_len; 1539 size_t new_len;
1018 1540
1019 new_len = strlen(*dst) + strlen(src); 1541 new_len = strlen(*dst) + strlen(src);
1020 if (*curr_len <= new_len) { 1542 if (*curr_len <= new_len) {
1021 *curr_len = new_len + (*curr_len / 2); 1543 *curr_len = new_len + (*curr_len / 2);
1022 *dst = realloc(*dst, *curr_len); 1544 *dst = realloc(*dst, *curr_len);
1023 if (!*dst) 1545 if (!*dst)
1024 err("could not realloc %li bytes", (unsigned long)*curr_len); 1546 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1025 } 1547 }
1026 1548
1549 if (n)
1550 strncat(*dst, src, n);
1551 else
1027 strcat(*dst, src); 1552 strcat(*dst, src);
1028} 1553}
1029
1030static inline void xchrcat(char **dst, const char append, size_t *curr_len) 1554static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1031{ 1555{
1032 static char my_app[2]; 1556 static char my_app[2];
1033 my_app[0] = append; 1557 my_app[0] = append;
1034 my_app[1] = '\0'; 1558 my_app[1] = '\0';
1035 xstrcat(dst, my_app, curr_len); 1559 xstrcat(dst, my_app, curr_len);
1036} 1560}
1561
1037 1562
1038 1563
1039int main(int argc, char *argv[]) 1564int main(int argc, char *argv[])
1040{ 1565{
1041 if (argc < 2) 1566 if (argc < 2)

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