/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.79 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 1.79 2005/06/09 23:53:58 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 1.79 2005/06/09 23:53:58 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_phdr = 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;
71static char show_textrels = 0; 52static char show_textrels = 0;
72static char show_banner = 1; 53static char show_banner = 1;
73static char be_quiet = 0; 54static char be_quiet = 0;
74static char be_verbose = 0; 55static char be_verbose = 0;
75static char be_wewy_wewy_quiet = 0; 56static char be_wewy_wewy_quiet = 0;
76static char *find_sym = NULL, *versioned_symname = NULL; 57static char *find_sym = NULL, *versioned_symname = NULL;
77static char *find_lib = NULL; 58static char *find_lib = NULL;
78static char *out_format = NULL; 59static char *out_format = NULL;
79static char *search_path = NULL; 60static char *search_path = NULL;
61static char fix_elf = 0;
62static char gmatch = 0;
63static char use_ldcache = 0;
80 64
81 65
66caddr_t ldcache = 0;
67size_t ldcache_size = 0;
82 68
83/* sub-funcs for scanelf_file() */ 69/* sub-funcs for scanelf_file() */
84static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 70static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
85{ 71{
86 /* find the best SHT_DYNSYM and SHT_STRTAB sections */ 72 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
107 GET_SYMTABS(32) 93 GET_SYMTABS(32)
108 GET_SYMTABS(64) 94 GET_SYMTABS(64)
109} 95}
110static char *scanelf_file_pax(elfobj *elf, char *found_pax) 96static char *scanelf_file_pax(elfobj *elf, char *found_pax)
111{ 97{
112 static char *paxflags;
113 static char ret[7]; 98 static char ret[7];
114 unsigned long i, shown; 99 unsigned long i, shown;
115
116 100
117 if (!show_pax) return NULL; 101 if (!show_pax) return NULL;
118 102
119 shown = 0; 103 shown = 0;
120 memset(&ret, 0, sizeof(ret)); 104 memset(&ret, 0, sizeof(ret));
139 SHOW_PAX(64) 123 SHOW_PAX(64)
140 } 124 }
141 125
142 /* fall back to EI_PAX if no PT_PAX was found */ 126 /* fall back to EI_PAX if no PT_PAX was found */
143 if (!*ret) { 127 if (!*ret) {
128 static char *paxflags;
144 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); 129 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
145 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) { 130 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
146 *found_pax = 1; 131 *found_pax = 1;
147 return paxflags; 132 return (be_wewy_wewy_quiet ? NULL : paxflags);
148 } 133 }
149 strncpy(ret, paxflags, sizeof(ret)); 134 strncpy(ret, paxflags, sizeof(ret));
150 // ++shown;
151 } 135 }
152 136
153 if (be_quiet && !shown) 137 if (be_wewy_wewy_quiet || (be_quiet && !shown))
154 return NULL; 138 return NULL;
139 else
155 return ret; 140 return ret;
156
157} 141}
142
158static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load) 143static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load)
159{ 144{
160 static char ret[12]; 145 static char ret[12];
161 char *found; 146 char *found;
162 unsigned long i, off, shown, check_flags;
163 unsigned char multi_stack, multi_relro, multi_load; 147 unsigned long i, shown, multi_stack, multi_relro, multi_load;
148 int max_pt_load;
164 149
165 if (!show_phdr) return NULL; 150 if (!show_phdr) return NULL;
166 151
167 memcpy(ret, "--- --- ---\0", 12); 152 memcpy(ret, "--- --- ---\0", 12);
168 153
169 shown = 0; 154 shown = 0;
170 multi_stack = multi_relro = multi_load = 0; 155 multi_stack = multi_relro = multi_load = 0;
156 max_pt_load = elf_max_pt_load(elf);
171 157
172 if (elf->phdr) { 158#define NOTE_GNU_STACK ".note.GNU-stack"
173#define SHOW_PHDR(B) \ 159#define SHOW_PHDR(B) \
174 if (elf->elf_class == ELFCLASS ## B) { \ 160 if (elf->elf_class == ELFCLASS ## B) { \
175 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 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) { \
176 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 165 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
177 uint32_t flags; \
178 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 166 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
179 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 167 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
180 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ 168 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
181 found = found_phdr; \ 169 found = found_phdr; \
182 off = 0; \ 170 offset = 0; \
183 check_flags = PF_X; \ 171 check_flags = PF_X; \
184 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \ 172 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
185 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 173 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
186 found = found_relro; \ 174 found = found_relro; \
187 off = 4; \ 175 offset = 4; \
188 check_flags = PF_X; \ 176 check_flags = PF_X; \
189 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 177 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
178 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \
190 if (multi_load++ > 2) warnf("%s: more than 2 PT_LOAD's !?", elf->filename); \ 179 if (multi_load++ > max_pt_load) warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
191 found = found_load; \ 180 found = found_load; \
192 off = 8; \ 181 offset = 8; \
193 check_flags = PF_W|PF_X; \ 182 check_flags = PF_W|PF_X; \
194 } else \ 183 } else \
195 continue; \ 184 continue; \
196 flags = EGET(phdr[i].p_flags); \ 185 flags = EGET(phdr[i].p_flags); \
197 if (be_quiet && ((flags & check_flags) != check_flags)) \ 186 if (be_quiet && ((flags & check_flags) != check_flags)) \
198 continue; \ 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 } \
199 memcpy(ret+off, gnu_short_stack_flags(flags), 3); \ 193 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
200 *found = 1; \ 194 *found = 1; \
201 ++shown; \ 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 } \
202 } \ 230 } \
203 } 231 }
204 SHOW_PHDR(32) 232 SHOW_PHDR(32)
205 SHOW_PHDR(64) 233 SHOW_PHDR(64)
206 }
207 234
208 if (be_quiet && !shown) 235 if (be_wewy_wewy_quiet || (be_quiet && !shown))
209 return NULL; 236 return NULL;
210 else 237 else
211 return ret; 238 return ret;
212} 239}
213static char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 240static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
214{ 241{
215 static char ret[] = "TEXTREL"; 242 static const char *ret = "TEXTREL";
216 unsigned long i; 243 unsigned long i;
217 244
218 if (!show_textrel && !show_textrels) return NULL; 245 if (!show_textrel && !show_textrels) return NULL;
219 246
220 if (elf->phdr) { 247 if (elf->phdr) {
243 } 270 }
244 271
245 if (be_quiet || be_wewy_wewy_quiet) 272 if (be_quiet || be_wewy_wewy_quiet)
246 return NULL; 273 return NULL;
247 else 274 else
248 return (char *)" - "; 275 return " - ";
249} 276}
250static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) 277static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
251{ 278{
252 unsigned long p, s, r, rmax; 279 unsigned long s, r, rmax;
253 void *symtab_void, *strtab_void; 280 void *symtab_void, *strtab_void, *text_void;
254 281
255 if (!show_textrels) return NULL; 282 if (!show_textrels) return NULL;
256 283
257 /* don't search for TEXTREL's if the ELF doesn't have any */ 284 /* don't search for TEXTREL's if the ELF doesn't have any */
258 if (!*found_textrel) scanelf_file_textrel(elf, found_textrel); 285 if (!*found_textrel) scanelf_file_textrel(elf, found_textrel);
259 if (!*found_textrel) return NULL; 286 if (!*found_textrel) return NULL;
260 287
261 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 288 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
289 text_void = elf_findsecbyname(elf, ".text");
262 290
263 if (symtab_void && strtab_void && elf->phdr && elf->shdr) { 291 if (symtab_void && strtab_void && text_void && elf->shdr) {
264#define SHOW_TEXTRELS(B) \ 292#define SHOW_TEXTRELS(B) \
265 if (elf->elf_class == ELFCLASS ## B) { \ 293 if (elf->elf_class == ELFCLASS ## B) { \
266 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 294 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
267 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
268 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 295 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
269 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 296 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
270 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_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); \
271 Elf ## B ## _Rel *rel; \ 301 Elf ## B ## _Rel *rel; \
272 Elf ## B ## _Rela *rela; \ 302 Elf ## B ## _Rela *rela; \
273 /* search the section headers for relocations */ \ 303 /* search the section headers for relocations */ \
274 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 304 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
275 uint32_t sh_type = EGET(shdr[s].sh_type); \ 305 uint32_t sh_type = EGET(shdr[s].sh_type); \
281 rel = NULL; \ 311 rel = NULL; \
282 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 312 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \
283 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 313 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
284 } else \ 314 } else \
285 continue; \ 315 continue; \
286 /* search the program headers for PT_LOAD headers */ \
287 for (p = 0; p < EGET(ehdr->e_phnum); ++p) { \
288 Elf ## B ## _Addr vaddr; \
289 uint ## B ## _t memsz; \
290 if (EGET(phdr[p].p_type) != PT_LOAD) continue; \
291 if (EGET(phdr[p].p_flags) & PF_W) continue; \
292 vaddr = EGET(phdr[p].p_vaddr); \
293 memsz = EGET(phdr[p].p_memsz); \
294 /* now see if any of the relocs are in the PT_LOAD */ \ 316 /* now see if any of the relocs are in the .text */ \
295 for (r = 0; r < rmax; ++r) { \ 317 for (r = 0; r < rmax; ++r) { \
296 unsigned long sym_max; \ 318 unsigned long sym_max; \
297 Elf ## B ## _Addr offset_tmp; \ 319 Elf ## B ## _Addr offset_tmp; \
298 Elf ## B ## _Sym *func; \ 320 Elf ## B ## _Sym *func; \
299 Elf ## B ## _Sym *sym; \ 321 Elf ## B ## _Sym *sym; \
300 Elf ## B ## _Addr r_offset; \ 322 Elf ## B ## _Addr r_offset; \
301 uint ## B ## _t r_info; \ 323 uint ## B ## _t r_info; \
302 if (sh_type == SHT_REL) { \ 324 if (sh_type == SHT_REL) { \
303 r_offset = EGET(rel[r].r_offset); \ 325 r_offset = EGET(rel[r].r_offset); \
304 r_info = EGET(rel[r].r_info); \ 326 r_info = EGET(rel[r].r_info); \
305 } else { \ 327 } else { \
306 r_offset = EGET(rela[r].r_offset); \ 328 r_offset = EGET(rela[r].r_offset); \
307 r_info = EGET(rela[r].r_info); \ 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); \
308 } \ 363 } \
309 /* make sure this relocation is inside of the .text */ \
310 if (r_offset < vaddr || r_offset >= vaddr + memsz) continue; \
311 *found_textrels = 1; \
312 /* locate this relocation symbol name */ \
313 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
314 sym_max = ELF ## B ## _R_SYM(r_info); \
315 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
316 sym += sym_max; \
317 else \
318 sym = NULL; \
319 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
320 /* show the raw details about this reloc */ \
321 printf("\tTEXTREL %s: ", elf->base_filename); \
322 if (sym && sym->st_name) \
323 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \
324 else \
325 printf("(NULL: fake?)"); \
326 printf(" [0x%lX]", (unsigned long)r_offset); \
327 /* now try to find the closest symbol that this rel is probably in */ \
328 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
329 func = NULL; \
330 offset_tmp = 0; \
331 while (sym_max--) { \
332 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
333 func = sym; \
334 offset_tmp = EGET(sym->st_value); \
335 } \
336 ++sym; \ 364 ++sym; \
337 } \
338 printf(" in "); \
339 if (func && func->st_name) \
340 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \
341 else \
342 printf("(NULL: fake?)"); \
343 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
344 } \ 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); \
345 } \ 372 } \
346 } } 373 } }
347 SHOW_TEXTRELS(32) 374 SHOW_TEXTRELS(32)
348 SHOW_TEXTRELS(64) 375 SHOW_TEXTRELS(64)
349 } 376 }
377 if (!*found_textrels)
378 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
350 379
351 return NULL; 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 }
352} 406}
353static 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)
354{ 408{
355 unsigned long i, s; 409 unsigned long i, s;
356 char *rpath, *runpath, **r; 410 char *rpath, *runpath, **r;
390 /* Verify the memory is somewhat sane */ \ 444 /* Verify the memory is somewhat sane */ \
391 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 445 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
392 if (offset < (Elf ## B ## _Off)elf->len) { \ 446 if (offset < (Elf ## B ## _Off)elf->len) { \
393 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 447 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
394 *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); \
395 /* If quiet, don't output paths in ld.so.conf */ \ 452 /* If quiet, don't output paths in ld.so.conf */ \
396 if (be_quiet) { \ 453 if (be_quiet) { \
397 size_t len; \ 454 size_t len; \
398 char *start, *end; \ 455 char *start, *end; \
399 /* note that we only 'chop' off leading known paths. */ \ 456 /* note that we only 'chop' off leading known paths. */ \
400 /* since *r is read-only memory, we can only move the ptr forward. */ \ 457 /* since *r is read-only memory, we can only move the ptr forward. */ \
401 start = *r; \ 458 start = *r; \
402 /* scan each path in : delimited list */ \ 459 /* scan each path in : delimited list */ \
403 while (start) { \ 460 while (start) { \
461 rpath_security_checks(elf, start, get_elfdtype(word)); \
404 end = strchr(start, ':'); \ 462 end = strchr(start, ':'); \
405 len = (end ? abs(end - start) : strlen(start)); \ 463 len = (end ? abs(end - start) : strlen(start)); \
464 if (use_ldcache) \
406 for (s = 0; ldpaths[s]; ++s) { \ 465 for (s = 0; ldpaths[s]; ++s) \
407 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 466 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
408 *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)++; \
409 break; \ 472 break; \
410 } \ 473 } \
411 } \
412 if (!*r || !ldpaths[s] || !end) \ 474 if (!*r || !end) \
413 start = NULL; \ 475 break; \
414 else \ 476 else \
415 start = start + len + 1; \ 477 start = start + len + 1; \
416 } \ 478 } \
417 } \ 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) \
418 if (*r) *found_rpath = 1; \ 520 *found_rpath = 1; \
521 } \
419 } \ 522 } \
420 ++dyn; \ 523 ++dyn; \
421 } \ 524 } \
422 } } 525 } }
423 SHOW_RPATH(32) 526 SHOW_RPATH(32)
440 } else if (rpath || runpath) 543 } else if (rpath || runpath)
441 xstrcat(ret, (runpath ? runpath : rpath), ret_len); 544 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
442 else if (!be_quiet) 545 else if (!be_quiet)
443 xstrcat(ret, " - ", ret_len); 546 xstrcat(ret, " - ", ret_len);
444} 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
445static char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, 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)
446{ 637{
447 unsigned long i; 638 unsigned long i;
448 char *needed; 639 char *needed;
449 void *strtbl_void; 640 void *strtbl_void;
641 char *p;
450 642
451 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 643 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
452 644
453 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 645 strtbl_void = elf_findsecbyname(elf, ".dynstr");
454 646
474 } \ 666 } \
475 needed = (char*)(elf->data + offset); \ 667 needed = (char*)(elf->data + offset); \
476 if (op == 0) { \ 668 if (op == 0) { \
477 if (!be_wewy_wewy_quiet) { \ 669 if (!be_wewy_wewy_quiet) { \
478 if (*found_needed) xchrcat(ret, ',', ret_len); \ 670 if (*found_needed) xchrcat(ret, ',', ret_len); \
671 if (use_ldcache) \
672 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
673 needed = p; \
479 xstrcat(ret, needed, ret_len); \ 674 xstrcat(ret, needed, ret_len); \
480 } \ 675 } \
481 *found_needed = 1; \ 676 *found_needed = 1; \
482 } else { \ 677 } else { \
483 if (strcmp(find_lib, needed)) return NULL; \ 678 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \
484 *found_lib = 1; \ 679 *found_lib = 1; \
485 return (be_wewy_wewy_quiet ? NULL : find_lib); \ 680 return (be_wewy_wewy_quiet ? NULL : needed); \
681 } \
486 } \ 682 } \
487 } \ 683 } \
488 ++dyn; \ 684 ++dyn; \
489 } \ 685 } \
490 } } 686 } }
491 SHOW_NEEDED(32) 687 SHOW_NEEDED(32)
492 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);
493 } 691 }
494 692
495 return NULL; 693 return NULL;
496} 694}
497static char *scanelf_file_interp(elfobj *elf, char *found_interp) 695static char *scanelf_file_interp(elfobj *elf, char *found_interp)
555 } else { 753 } else {
556 *found_bind = 1; 754 *found_bind = 1;
557 return (char *) "LAZY"; 755 return (char *) "LAZY";
558 } 756 }
559} 757}
758static char *scanelf_file_soname(elfobj *elf, char *found_soname)
759{
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}
560static char *scanelf_file_sym(elfobj *elf, char *found_sym) 804static char *scanelf_file_sym(elfobj *elf, char *found_sym)
561{ 805{
562 unsigned long i; 806 unsigned long i;
807 char *ret;
563 void *symtab_void, *strtab_void; 808 void *symtab_void, *strtab_void;
564 809
565 if (!find_sym) return NULL; 810 if (!find_sym) return NULL;
811 ret = find_sym;
566 812
567 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 813 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
568 814
569 if (symtab_void && strtab_void) { 815 if (symtab_void && strtab_void) {
570#define FIND_SYM(B) \ 816#define FIND_SYM(B) \
571 if (elf->elf_class == ELFCLASS ## B) { \ 817 if (elf->elf_class == ELFCLASS ## B) { \
572 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 818 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
573 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 819 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
574 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)); \
575 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 821 unsigned long cnt = EGET(symtab->sh_entsize); \
576 char *symname; \ 822 char *symname; \
823 if (cnt) \
824 cnt = EGET(symtab->sh_size) / cnt; \
577 for (i = 0; i < cnt; ++i) { \ 825 for (i = 0; i < cnt; ++i) { \
578 if (sym->st_name) { \ 826 if (sym->st_name) { \
579 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 } \
580 if (*find_sym == '*') { \ 832 if (*find_sym == '*') { \
581 printf("%s(%s) %5lX %15s %s\n", \ 833 printf("%s(%s) %5lX %15s %s\n", \
582 ((*found_sym == 0) ? "\n\t" : "\t"), \ 834 ((*found_sym == 0) ? "\n\t" : "\t"), \
583 elf->base_filename, \ 835 elf->base_filename, \
584 (long)sym->st_size, \ 836 (unsigned long)sym->st_size, \
585 (char *)get_elfstttype(sym->st_info), \ 837 get_elfstttype(sym->st_info), \
586 symname); \ 838 symname); \
587 *found_sym = 1; \ 839 *found_sym = 1; \
588 } 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') || \
589 (strcmp(symname, versioned_symname) == 0)) \ 848 (strcmp(symname, versioned_symname) == 0)) { \
849 ret = this_sym; \
590 (*found_sym)++; \ 850 (*found_sym)++; \
851 goto break_out; \
852 } \
853 this_sym = next_sym + 1; \
854 } while (*next_sym != '\0'); \
855 } \
591 } \ 856 } \
592 ++sym; \ 857 ++sym; \
593 } } 858 } }
594 FIND_SYM(32) 859 FIND_SYM(32)
595 FIND_SYM(64) 860 FIND_SYM(64)
596 } 861 }
597 862
863break_out:
598 if (be_wewy_wewy_quiet) return NULL; 864 if (be_wewy_wewy_quiet) return NULL;
599 865
600 if (*find_sym != '*' && *found_sym) 866 if (*find_sym != '*' && *found_sym)
601 return find_sym; 867 return ret;
602 if (be_quiet) 868 if (be_quiet)
603 return NULL; 869 return NULL;
604 else 870 else
605 return (char *)" - "; 871 return (char *)" - ";
606} 872}
873
874
607/* scan an elf file and show all the fun stuff */ 875/* scan an elf file and show all the fun stuff */
608#define prints(str) write(fileno(stdout), str, strlen(str)) 876#define prints(str) write(fileno(stdout), str, strlen(str))
609static void scanelf_file(const char *filename) 877static int scanelf_elfobj(elfobj *elf)
610{ 878{
611 unsigned long i; 879 unsigned long i;
612 char found_pax, found_phdr, found_relro, found_load, found_textrel, 880 char found_pax, found_phdr, found_relro, found_load, found_textrel,
613 found_rpath, found_needed, found_interp, found_bind, 881 found_rpath, found_needed, found_interp, found_bind, found_soname,
614 found_sym, found_lib, found_file, found_textrels; 882 found_sym, found_lib, found_file, found_textrels;
615 elfobj *elf;
616 struct stat st;
617 static char *out_buffer = NULL; 883 static char *out_buffer = NULL;
618 static size_t out_len; 884 static size_t out_len;
619 885
620 /* make sure 'filename' exists */
621 if (lstat(filename, &st) == -1) {
622 if (be_verbose > 2) printf("%s: does not exist\n", filename);
623 return;
624 }
625 /* always handle regular files and handle symlinked files if no -y */
626 if (S_ISLNK(st.st_mode)) {
627 if (!scan_symlink) return;
628 stat(filename, &st);
629 }
630 if (!S_ISREG(st.st_mode)) {
631 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
632 return;
633 }
634
635 found_pax = found_phdr = found_relro = found_load = found_textrel = \ 886 found_pax = found_phdr = found_relro = found_load = found_textrel = \
636 found_rpath = found_needed = found_interp = found_bind = \ 887 found_rpath = found_needed = found_interp = found_bind = found_soname = \
637 found_sym = found_lib = found_file = found_textrels = 0; 888 found_sym = found_lib = found_file = found_textrels = 0;
638 889
639 /* verify this is real ELF */
640 if ((elf = readelf(filename)) == NULL) {
641 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
642 return;
643 }
644
645 if (be_verbose > 1) 890 if (be_verbose > 2)
646 printf("%s: scanning file {%s,%s}\n", filename, 891 printf("%s: scanning file {%s,%s}\n", elf->filename,
647 get_elfeitype(EI_CLASS, elf->elf_class), 892 get_elfeitype(EI_CLASS, elf->elf_class),
648 get_elfeitype(EI_DATA, elf->data[EI_DATA])); 893 get_elfeitype(EI_DATA, elf->data[EI_DATA]));
649 else if (be_verbose) 894 else if (be_verbose > 1)
650 printf("%s: scanning file\n", filename); 895 printf("%s: scanning file\n", elf->filename);
651 896
652 /* init output buffer */ 897 /* init output buffer */
653 if (!out_buffer) { 898 if (!out_buffer) {
654 out_len = sizeof(char) * 80; 899 out_len = sizeof(char) * 80;
655 out_buffer = (char*)xmalloc(out_len); 900 out_buffer = (char*)xmalloc(out_len);
673 case 't': prints("TEXTREL "); break; 918 case 't': prints("TEXTREL "); break;
674 case 'r': prints("RPATH "); break; 919 case 'r': prints("RPATH "); break;
675 case 'n': prints("NEEDED "); break; 920 case 'n': prints("NEEDED "); break;
676 case 'i': prints("INTERP "); break; 921 case 'i': prints("INTERP "); break;
677 case 'b': prints("BIND "); break; 922 case 'b': prints("BIND "); break;
923 case 'S': prints("SONAME "); break;
678 case 's': prints("SYM "); break; 924 case 's': prints("SYM "); break;
679 case 'N': prints("LIB "); break; 925 case 'N': prints("LIB "); break;
680 case 'T': prints("TEXTRELS "); break; 926 case 'T': prints("TEXTRELS "); break;
681 default: warnf("'%c' has no title ?", out_format[i]); 927 default: warnf("'%c' has no title ?", out_format[i]);
682 } 928 }
708 case '#': 954 case '#':
709 xchrcat(&out_buffer, out_format[i], &out_len); break; 955 xchrcat(&out_buffer, out_format[i], &out_len); break;
710 case 'F': 956 case 'F':
711 found_file = 1; 957 found_file = 1;
712 if (be_wewy_wewy_quiet) break; 958 if (be_wewy_wewy_quiet) break;
713 xstrcat(&out_buffer, filename, &out_len); 959 xstrcat(&out_buffer, elf->filename, &out_len);
714 break; 960 break;
715 case 'p': 961 case 'p':
716 found_file = 1; 962 found_file = 1;
717 if (be_wewy_wewy_quiet) break; 963 if (be_wewy_wewy_quiet) break;
718 tmp = filename; 964 tmp = elf->filename;
719 if (search_path) { 965 if (search_path) {
720 ssize_t len_search = strlen(search_path); 966 ssize_t len_search = strlen(search_path);
721 ssize_t len_file = strlen(filename); 967 ssize_t len_file = strlen(elf->filename);
722 if (!strncmp(filename, search_path, len_search) && \ 968 if (!strncmp(elf->filename, search_path, len_search) && \
723 len_file > len_search) 969 len_file > len_search)
724 tmp += len_search; 970 tmp += len_search;
725 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++; 971 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
726 } 972 }
727 xstrcat(&out_buffer, tmp, &out_len); 973 xstrcat(&out_buffer, tmp, &out_len);
728 break; 974 break;
729 case 'f': 975 case 'f':
730 found_file = 1; 976 found_file = 1;
731 if (be_wewy_wewy_quiet) break; 977 if (be_wewy_wewy_quiet) break;
732 tmp = strrchr(filename, '/'); 978 tmp = strrchr(elf->filename, '/');
733 tmp = (tmp == NULL ? filename : tmp+1); 979 tmp = (tmp == NULL ? elf->filename : tmp+1);
734 xstrcat(&out_buffer, tmp, &out_len); 980 xstrcat(&out_buffer, tmp, &out_len);
735 break; 981 break;
736 case 'o': out = get_elfetype(elf); break; 982 case 'o': out = get_elfetype(elf); break;
737 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 983 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
738 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break; 984 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
741 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;
742 case 'n': 988 case 'n':
743 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &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;
744 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 990 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
745 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;
746 case 's': out = scanelf_file_sym(elf, &found_sym); break; 993 case 's': out = scanelf_file_sym(elf, &found_sym); break;
747 default: warnf("'%c' has no scan code?", out_format[i]); 994 default: warnf("'%c' has no scan code?", out_format[i]);
748 } 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
749 if (out) xstrcat(&out_buffer, out, &out_len); 1001 xstrcat(&out_buffer, out, &out_len);
1002 }
750 } 1003 }
751 1004
752#define FOUND_SOMETHING() \ 1005#define FOUND_SOMETHING() \
753 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1006 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
754 found_rpath || found_needed || found_interp || found_bind || \ 1007 found_rpath || found_needed || found_interp || found_bind || \
755 found_sym || found_lib || found_textrels) 1008 found_soname || found_sym || found_lib || found_textrels)
756 1009
757 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { 1010 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
758 xchrcat(&out_buffer, ' ', &out_len); 1011 xchrcat(&out_buffer, ' ', &out_len);
759 xstrcat(&out_buffer, filename, &out_len); 1012 xstrcat(&out_buffer, elf->filename, &out_len);
760 } 1013 }
761 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) { 1014 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
762 puts(out_buffer); 1015 puts(out_buffer);
763 fflush(stdout); 1016 fflush(stdout);
764 } 1017 }
765 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:
766 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);
767} 1113}
768 1114
769/* 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 */
770static void scanelf_dir(const char *path) 1116static void scanelf_dir(const char *path)
771{ 1117{
772 register DIR *dir; 1118 register DIR *dir;
773 register struct dirent *dentry; 1119 register struct dirent *dentry;
774 struct stat st_top, st; 1120 struct stat st_top, st;
775 char buf[_POSIX_PATH_MAX]; 1121 char buf[__PAX_UTILS_PATH_MAX];
776 size_t pathlen = 0, len = 0; 1122 size_t pathlen = 0, len = 0;
777 1123
778 /* make sure path exists */ 1124 /* make sure path exists */
779 if (lstat(path, &st_top) == -1) { 1125 if (lstat(path, &st_top) == -1) {
780 if (be_verbose > 2) printf("%s: does not exist\n", path); 1126 if (be_verbose > 2) printf("%s: does not exist\n", path);
790 /* now scan the dir looking for fun stuff */ 1136 /* now scan the dir looking for fun stuff */
791 if ((dir = opendir(path)) == NULL) { 1137 if ((dir = opendir(path)) == NULL) {
792 warnf("could not opendir %s: %s", path, strerror(errno)); 1138 warnf("could not opendir %s: %s", path, strerror(errno));
793 return; 1139 return;
794 } 1140 }
795 if (be_verbose) printf("%s: scanning dir\n", path); 1141 if (be_verbose > 1) printf("%s: scanning dir\n", path);
796 1142
797 pathlen = strlen(path); 1143 pathlen = strlen(path);
798 while ((dentry = readdir(dir))) { 1144 while ((dentry = readdir(dir))) {
799 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 1145 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
800 continue; 1146 continue;
819 1165
820static int scanelf_from_file(char *filename) 1166static int scanelf_from_file(char *filename)
821{ 1167{
822 FILE *fp = NULL; 1168 FILE *fp = NULL;
823 char *p; 1169 char *p;
824 char path[_POSIX_PATH_MAX]; 1170 char path[__PAX_UTILS_PATH_MAX];
825 1171
826 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) 1172 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL))
827 fp = stdin; 1173 fp = stdin;
828 else if ((fp = fopen(filename, "r")) == NULL) 1174 else if ((fp = fopen(filename, "r")) == NULL)
829 return 1; 1175 return 1;
830 1176
831 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1177 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
832 if ((p = strchr(path, '\n')) != NULL) 1178 if ((p = strchr(path, '\n')) != NULL)
833 *p = 0; 1179 *p = 0;
834 search_path = path; 1180 search_path = path;
835 scanelf_dir(path); 1181 scanelf_dir(path);
836 } 1182 }
841 1187
842static void load_ld_so_conf() 1188static void load_ld_so_conf()
843{ 1189{
844 FILE *fp = NULL; 1190 FILE *fp = NULL;
845 char *p; 1191 char *p;
846 char path[_POSIX_PATH_MAX]; 1192 char path[__PAX_UTILS_PATH_MAX];
847 int i = 0; 1193 int i = 0;
848 1194
849 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 1195 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
850 return; 1196 return;
851 1197
852 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1198 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
853 if (*path != '/') 1199 if (*path != '/')
854 continue; 1200 continue;
855 1201
856 if ((p = strrchr(path, '\r')) != NULL) 1202 if ((p = strrchr(path, '\r')) != NULL)
857 *p = 0; 1203 *p = 0;
909 1255
910 free(path); 1256 free(path);
911} 1257}
912 1258
913 1259
914
915/* usage / invocation handling functions */ 1260/* usage / invocation handling functions */
916#define PARSE_FLAGS "plRmyxetrnibs:N:TaqvF:f:o:BhV" 1261#define PARSE_FLAGS "plRmyAXxetrnLibSs:gN:TaqvF:f:o:E:BhV"
917#define a_argument required_argument 1262#define a_argument required_argument
918static struct option const long_opts[] = { 1263static struct option const long_opts[] = {
919 {"path", no_argument, NULL, 'p'}, 1264 {"path", no_argument, NULL, 'p'},
920 {"ldpath", no_argument, NULL, 'l'}, 1265 {"ldpath", no_argument, NULL, 'l'},
921 {"recursive", no_argument, NULL, 'R'}, 1266 {"recursive", no_argument, NULL, 'R'},
922 {"mount", no_argument, NULL, 'm'}, 1267 {"mount", no_argument, NULL, 'm'},
923 {"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'},
924 {"pax", no_argument, NULL, 'x'}, 1272 {"pax", no_argument, NULL, 'x'},
925 {"header", no_argument, NULL, 'e'}, 1273 {"header", no_argument, NULL, 'e'},
926 {"textrel", no_argument, NULL, 't'}, 1274 {"textrel", no_argument, NULL, 't'},
927 {"rpath", no_argument, NULL, 'r'}, 1275 {"rpath", no_argument, NULL, 'r'},
928 {"needed", no_argument, NULL, 'n'}, 1276 {"needed", no_argument, NULL, 'n'},
929 {"interp", no_argument, NULL, 'i'}, 1277 {"interp", no_argument, NULL, 'i'},
930 {"bind", no_argument, NULL, 'b'}, 1278 {"bind", no_argument, NULL, 'b'},
1279 {"soname", no_argument, NULL, 'S'},
931 {"symbol", a_argument, NULL, 's'}, 1280 {"symbol", a_argument, NULL, 's'},
932 {"lib", a_argument, NULL, 'N'}, 1281 {"lib", a_argument, NULL, 'N'},
1282 {"gmatch", no_argument, NULL, 'g'},
933 {"textrels", no_argument, NULL, 'T'}, 1283 {"textrels", no_argument, NULL, 'T'},
1284 {"etype", a_argument, NULL, 'E'},
934 {"all", no_argument, NULL, 'a'}, 1285 {"all", no_argument, NULL, 'a'},
935 {"quiet", no_argument, NULL, 'q'}, 1286 {"quiet", no_argument, NULL, 'q'},
936 {"verbose", no_argument, NULL, 'v'}, 1287 {"verbose", no_argument, NULL, 'v'},
937 {"format", a_argument, NULL, 'F'}, 1288 {"format", a_argument, NULL, 'F'},
938 {"from", a_argument, NULL, 'f'}, 1289 {"from", a_argument, NULL, 'f'},
946static const char *opts_help[] = { 1297static const char *opts_help[] = {
947 "Scan all directories in PATH environment", 1298 "Scan all directories in PATH environment",
948 "Scan all directories in /etc/ld.so.conf", 1299 "Scan all directories in /etc/ld.so.conf",
949 "Scan directories recursively", 1300 "Scan directories recursively",
950 "Don't recursively cross mount points", 1301 "Don't recursively cross mount points",
951 "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",
952 "Print PaX markings", 1306 "Print PaX markings",
953 "Print GNU_STACK/PT_LOAD markings", 1307 "Print GNU_STACK/PT_LOAD markings",
954 "Print TEXTREL information", 1308 "Print TEXTREL information",
955 "Print RPATH information", 1309 "Print RPATH information",
956 "Print NEEDED information", 1310 "Print NEEDED information",
957 "Print INTERP information", 1311 "Print INTERP information",
958 "Print BIND information", 1312 "Print BIND information",
1313 "Print SONAME information",
959 "Find a specified symbol", 1314 "Find a specified symbol",
960 "Find a specified library", 1315 "Find a specified library",
1316 "Use strncmp to match libraries. (use with -N)",
961 "Locate cause of TEXTREL", 1317 "Locate cause of TEXTREL",
1318 "Print only ELF files matching numeric constant",
962 "Print all scanned info (-x -e -t -r -n -i -b)\n", 1319 "Print all scanned info (-x -e -t -r -b)\n",
963 "Only output 'bad' things", 1320 "Only output 'bad' things",
964 "Be verbose (can be specified more than once)", 1321 "Be verbose (can be specified more than once)",
965 "Use specified format for output", 1322 "Use specified format for output",
966 "Read input stream from a filename", 1323 "Read input stream from a filename",
967 "Write output stream to a filename", 1324 "Write output stream to a filename",
974/* display usage and exit */ 1331/* display usage and exit */
975static void usage(int status) 1332static void usage(int status)
976{ 1333{
977 unsigned long i; 1334 unsigned long i;
978 printf("* Scan ELF binaries for stuff\n\n" 1335 printf("* Scan ELF binaries for stuff\n\n"
979 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 1336 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
980 printf("Options: -[%s]\n", PARSE_FLAGS); 1337 printf("Options: -[%s]\n", PARSE_FLAGS);
981 for (i = 0; long_opts[i].name; ++i) 1338 for (i = 0; long_opts[i].name; ++i)
982 if (long_opts[i].has_arg == no_argument) 1339 if (long_opts[i].has_arg == no_argument)
983 printf(" -%c, --%-13s* %s\n", long_opts[i].val, 1340 printf(" -%c, --%-13s* %s\n", long_opts[i].val,
984 long_opts[i].name, opts_help[i]); 1341 long_opts[i].name, opts_help[i]);
992 puts("\nThe format modifiers for the -F option are:"); 1349 puts("\nThe format modifiers for the -F option are:");
993 puts(" F Filename \tx PaX Flags \te STACK/RELRO"); 1350 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
994 puts(" t TEXTREL \tr RPATH \tn NEEDED"); 1351 puts(" t TEXTREL \tr RPATH \tn NEEDED");
995 puts(" i INTERP \tb BIND \ts symbol"); 1352 puts(" i INTERP \tb BIND \ts symbol");
996 puts(" N library \to Type \tT TEXTRELs"); 1353 puts(" N library \to Type \tT TEXTRELs");
1354 puts(" S SONAME");
997 puts(" p filename (with search path removed)"); 1355 puts(" p filename (with search path removed)");
998 puts(" f base filename"); 1356 puts(" f filename (short name/basename)");
999 puts("Prefix each modifier with '%' (verbose) or '#' (silent)"); 1357 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1000 1358
1001 exit(status); 1359 exit(status);
1002} 1360}
1003 1361
1010 opterr = 0; 1368 opterr = 0;
1011 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) {
1012 switch (i) { 1370 switch (i) {
1013 1371
1014 case 'V': 1372 case 'V':
1015 printf("%s compiled %s\n%s\n" 1373 printf("pax-utils-%s: %s compiled %s\n%s\n"
1016 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 1374 "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
1017 __FILE__, __DATE__, rcsid, argv0); 1375 VERSION, __FILE__, __DATE__, rcsid, argv0);
1018 exit(EXIT_SUCCESS); 1376 exit(EXIT_SUCCESS);
1019 break; 1377 break;
1020 case 'h': usage(EXIT_SUCCESS); break; 1378 case 'h': usage(EXIT_SUCCESS); break;
1021 case 'f': 1379 case 'f':
1022 if (from_file) err("Don't specify -f twice"); 1380 if (from_file) warn("You prob don't want to specify -f twice");
1023 from_file = xstrdup(optarg); 1381 from_file = optarg;
1382 break;
1383 case 'E':
1384 strncpy(match_etypes, optarg, sizeof(match_etypes));
1024 break; 1385 break;
1025 case 'o': { 1386 case 'o': {
1026 FILE *fp = NULL; 1387 FILE *fp = NULL;
1027 if ((fp = freopen(optarg, "w", stdout)) == NULL) 1388 if ((fp = freopen(optarg, "w", stdout)) == NULL)
1028 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1389 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1029 SET_STDOUT(fp); 1390 SET_STDOUT(fp);
1030 break; 1391 break;
1031 } 1392 }
1032 1393
1033 case 's': { 1394 case 's': {
1034 size_t len;
1035 if (find_sym) err("Don't specify -s twice"); 1395 if (find_sym) warn("You prob don't want to specify -s twice");
1036 find_sym = xstrdup(optarg); 1396 find_sym = optarg;
1037 len = strlen(find_sym) + 1;
1038 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1)); 1397 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1039 sprintf(versioned_symname, "%s@", find_sym); 1398 sprintf(versioned_symname, "%s@", find_sym);
1040 break; 1399 break;
1041 } 1400 }
1042 case 'N': { 1401 case 'N': {
1043 if (find_lib) err("Don't specify -N twice"); 1402 if (find_lib) warn("You prob don't want to specify -N twice");
1044 find_lib = xstrdup(optarg); 1403 find_lib = optarg;
1045 break; 1404 break;
1046 } 1405 }
1047 1406
1048 case 'F': { 1407 case 'F': {
1049 if (out_format) err("Don't specify -F twice"); 1408 if (out_format) warn("You prob don't want to specify -F twice");
1050 out_format = xstrdup(optarg); 1409 out_format = optarg;
1051 break; 1410 break;
1052 } 1411 }
1053 1412
1413 case 'g': gmatch = 1; /* break; any reason we dont breal; here ? */
1414 case 'L': use_ldcache = 1; break;
1054 case 'y': scan_symlink = 0; break; 1415 case 'y': scan_symlink = 0; break;
1416 case 'A': scan_archives = 1; break;
1055 case 'B': show_banner = 0; break; 1417 case 'B': show_banner = 0; break;
1056 case 'l': scan_ldpath = 1; break; 1418 case 'l': scan_ldpath = 1; break;
1057 case 'p': scan_envpath = 1; break; 1419 case 'p': scan_envpath = 1; break;
1058 case 'R': dir_recurse = 1; break; 1420 case 'R': dir_recurse = 1; break;
1059 case 'm': dir_crossmount = 0; break; 1421 case 'm': dir_crossmount = 0; break;
1422 case 'X': ++fix_elf; break;
1060 case 'x': show_pax = 1; break; 1423 case 'x': show_pax = 1; break;
1061 case 'e': show_phdr = 1; break; 1424 case 'e': show_phdr = 1; break;
1062 case 't': show_textrel = 1; break; 1425 case 't': show_textrel = 1; break;
1063 case 'r': show_rpath = 1; break; 1426 case 'r': show_rpath = 1; break;
1064 case 'n': show_needed = 1; break; 1427 case 'n': show_needed = 1; break;
1065 case 'i': show_interp = 1; break; 1428 case 'i': show_interp = 1; break;
1066 case 'b': show_bind = 1; break; 1429 case 'b': show_bind = 1; break;
1430 case 'S': show_soname = 1; break;
1067 case 'T': show_textrels = 1; break; 1431 case 'T': show_textrels = 1; break;
1068 case 'q': be_quiet = 1; break; 1432 case 'q': be_quiet = 1; break;
1069 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1433 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1070 case 'a': show_pax = show_phdr = show_textrel = show_rpath = \ 1434 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break;
1071 show_needed = show_interp = show_bind = 1; break;
1072 1435
1073 case ':': 1436 case ':':
1074 err("Option missing parameter\n"); 1437 err("Option '%c' is missing parameter", optopt);
1075 case '?': 1438 case '?':
1076 err("Unknown option\n"); 1439 err("Unknown option '%c' or argument missing", optopt);
1077 default: 1440 default:
1078 err("Unhandled option '%c'", i); 1441 err("Unhandled option '%c'; please report this", i);
1079 } 1442 }
1080 } 1443 }
1081 1444
1082 /* let the format option override all other options */ 1445 /* let the format option override all other options */
1083 if (out_format) { 1446 if (out_format) {
1084 show_pax = show_phdr = show_textrel = show_rpath = \ 1447 show_pax = show_phdr = show_textrel = show_rpath = \
1085 show_needed = show_interp = show_bind = show_textrels = 0; 1448 show_needed = show_interp = show_bind = show_soname = \
1449 show_textrels = 0;
1086 for (i = 0; out_format[i]; ++i) { 1450 for (i = 0; out_format[i]; ++i) {
1087 if (!IS_MODIFIER(out_format[i])) continue; 1451 if (!IS_MODIFIER(out_format[i])) continue;
1088 1452
1089 switch (out_format[++i]) { 1453 switch (out_format[++i]) {
1090 case '%': break; 1454 case '%': break;
1100 case 't': show_textrel = 1; break; 1464 case 't': show_textrel = 1; break;
1101 case 'r': show_rpath = 1; break; 1465 case 'r': show_rpath = 1; break;
1102 case 'n': show_needed = 1; break; 1466 case 'n': show_needed = 1; break;
1103 case 'i': show_interp = 1; break; 1467 case 'i': show_interp = 1; break;
1104 case 'b': show_bind = 1; break; 1468 case 'b': show_bind = 1; break;
1469 case 'S': show_soname = 1; break;
1105 case 'T': show_textrels = 1; break; 1470 case 'T': show_textrels = 1; break;
1106 default: 1471 default:
1107 err("Invalid format specifier '%c' (byte %i)", 1472 err("Invalid format specifier '%c' (byte %i)",
1108 out_format[i], i+1); 1473 out_format[i], i+1);
1109 } 1474 }
1119 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 1484 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1120 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 1485 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1121 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 1486 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1122 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 1487 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1123 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);
1124 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len); 1490 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
1125 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len); 1491 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1126 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len); 1492 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
1127 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 1493 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1128 } 1494 }
1129 if (be_verbose > 2) printf("Format: %s\n", out_format); 1495 if (be_verbose > 2) printf("Format: %s\n", out_format);
1130 1496
1131 /* now lets actually do the scanning */ 1497 /* now lets actually do the scanning */
1132 if (scan_ldpath || (show_rpath && be_quiet)) 1498 if (scan_ldpath || use_ldcache)
1133 load_ld_so_conf(); 1499 load_ld_so_conf();
1134 if (scan_ldpath) scanelf_ldpath(); 1500 if (scan_ldpath) scanelf_ldpath();
1135 if (scan_envpath) scanelf_envpath(); 1501 if (scan_envpath) scanelf_envpath();
1136 if (from_file) { 1502 if (from_file) {
1137 scanelf_from_file(from_file); 1503 scanelf_from_file(from_file);
1138 free(from_file);
1139 from_file = *argv; 1504 from_file = *argv;
1140 } 1505 }
1141 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1506 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1142 err("Nothing to scan !?"); 1507 err("Nothing to scan !?");
1143 while (optind < argc) { 1508 while (optind < argc) {
1144 search_path = argv[optind++]; 1509 search_path = argv[optind++];
1145 scanelf_dir(search_path); 1510 scanelf_dir(search_path);
1146 } 1511 }
1147 1512
1148 /* clean up */ 1513 /* clean up */
1149 if (find_sym) { 1514 if (versioned_symname) free(versioned_symname);
1150 free(find_sym);
1151 free(versioned_symname);
1152 }
1153 if (find_lib) free(find_lib);
1154 if (out_format) free(out_format);
1155 for (i = 0; ldpaths[i]; ++i) 1515 for (i = 0; ldpaths[i]; ++i)
1156 free(ldpaths[i]); 1516 free(ldpaths[i]);
1517
1518 if (ldcache != 0)
1519 munmap(ldcache, ldcache_size);
1157} 1520}
1158 1521
1159 1522
1160 1523
1161/* utility funcs */ 1524/* utility funcs */
1163{ 1526{
1164 char *ret = strdup(s); 1527 char *ret = strdup(s);
1165 if (!ret) err("Could not strdup(): %s", strerror(errno)); 1528 if (!ret) err("Could not strdup(): %s", strerror(errno));
1166 return ret; 1529 return ret;
1167} 1530}
1168
1169static void *xmalloc(size_t size) 1531static void *xmalloc(size_t size)
1170{ 1532{
1171 void *ret = malloc(size); 1533 void *ret = malloc(size);
1172 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size); 1534 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1173 return ret; 1535 return ret;
1174} 1536}
1175
1176static 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)
1177{ 1538{
1178 size_t new_len; 1539 size_t new_len;
1179 1540
1180 new_len = strlen(*dst) + strlen(src); 1541 new_len = strlen(*dst) + strlen(src);
1181 if (*curr_len <= new_len) { 1542 if (*curr_len <= new_len) {
1182 *curr_len = new_len + (*curr_len / 2); 1543 *curr_len = new_len + (*curr_len / 2);
1183 *dst = realloc(*dst, *curr_len); 1544 *dst = realloc(*dst, *curr_len);
1184 if (!*dst) 1545 if (!*dst)
1185 err("could not realloc %li bytes", (unsigned long)*curr_len); 1546 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1186 } 1547 }
1187 1548
1549 if (n)
1550 strncat(*dst, src, n);
1551 else
1188 strcat(*dst, src); 1552 strcat(*dst, src);
1189} 1553}
1190
1191static 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)
1192{ 1555{
1193 static char my_app[2]; 1556 static char my_app[2];
1194 my_app[0] = append; 1557 my_app[0] = append;
1195 my_app[1] = '\0'; 1558 my_app[1] = '\0';

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