/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.75 Revision 1.164
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 1.75 2005/06/06 23:32:38 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.164 2006/12/03 00:17:18 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 1.75 2005/06/06 23:32:38 vapier Exp $"; 12static const char *rcsid = "$Id: scanelf.c,v 1.164 2006/12/03 00:17:18 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 == '#' || c == '+')
42 16
17#define do_state(option, flag) \
18 if (islower(option)) { \
19 flags &= ~PF_##flag; \
20 flags |= PF_NO##flag; \
21 } else { \
22 flags &= ~PF_NO##flag; \
23 flags |= PF_##flag; \
24 }
43 25
44 26
45/* prototypes */ 27/* prototypes */
46static void scanelf_file(const char *filename); 28static int file_matches_list(const char *filename, char **matchlist);
29static int scanelf_elfobj(elfobj *elf);
30static int scanelf_elf(const char *filename, int fd, size_t len);
31static int scanelf_archive(const char *filename, int fd, size_t len);
32static int scanelf_file(const char *filename, const struct stat *st_cache);
47static void scanelf_dir(const char *path); 33static int scanelf_dir(const char *path);
48static void scanelf_ldpath(); 34static void scanelf_ldpath(void);
49static void scanelf_envpath(); 35static void scanelf_envpath(void);
50static void usage(int status); 36static void usage(int status);
37static char **get_split_env(const char *envvar);
38static void parseenv(void);
51static void parseargs(int argc, char *argv[]); 39static int parseargs(int argc, char *argv[]);
52static char *xstrdup(const char *s); 40static char *xstrdup(const char *s);
53static void *xmalloc(size_t size); 41static void *xmalloc(size_t size);
42static void *xrealloc(void *ptr, size_t size);
54static void xstrcat(char **dst, const char *src, size_t *curr_len); 43static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
44#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); 45static inline void xchrcat(char **dst, const char append, size_t *curr_len);
56 46
57/* variables to control behavior */ 47/* variables to control behavior */
48static char match_etypes[126] = "";
58static char *ldpaths[256]; 49static char *ldpaths[256];
59static char scan_ldpath = 0; 50static char scan_ldpath = 0;
60static char scan_envpath = 0; 51static char scan_envpath = 0;
61static char scan_symlink = 1; 52static char scan_symlink = 1;
53static char scan_archives = 0;
62static char dir_recurse = 0; 54static char dir_recurse = 0;
63static char dir_crossmount = 1; 55static char dir_crossmount = 1;
64static char show_pax = 0; 56static char show_pax = 0;
65static char show_phdr = 0; 57static char show_phdr = 0;
66static char show_textrel = 0; 58static char show_textrel = 0;
67static char show_rpath = 0; 59static char show_rpath = 0;
68static char show_needed = 0; 60static char show_needed = 0;
69static char show_interp = 0; 61static char show_interp = 0;
70static char show_bind = 0; 62static char show_bind = 0;
63static char show_soname = 0;
64static char show_textrels = 0;
71static char show_banner = 1; 65static char show_banner = 1;
72static char be_quiet = 0; 66static char be_quiet = 0;
73static char be_verbose = 0; 67static char be_verbose = 0;
74static char be_wewy_wewy_quiet = 0; 68static char be_wewy_wewy_quiet = 0;
69static char be_semi_verbose = 0;
75static char *find_sym = NULL, *versioned_symname = NULL; 70static char *find_sym = NULL, *versioned_symname = NULL;
76static char *find_lib = NULL; 71static char *find_lib = NULL;
72static char *find_section = NULL;
77static char *out_format = NULL; 73static char *out_format = NULL;
78static char *search_path = NULL; 74static char *search_path = NULL;
75static char fix_elf = 0;
76static char gmatch = 0;
77static char use_ldcache = 0;
78
79static char **qa_textrels = NULL;
80static char **qa_execstack = NULL;
81static char **qa_wx_load = NULL;
82
83int match_bits = 0;
84caddr_t ldcache = 0;
85size_t ldcache_size = 0;
86unsigned long setpax = 0UL;
79 87
80 88
81 89
82/* sub-funcs for scanelf_file() */ 90/* sub-funcs for scanelf_file() */
91static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
92{
93 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
94#define GET_SYMTABS(B) \
95 if (elf->elf_class == ELFCLASS ## B) { \
96 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
97 /* debug sections */ \
98 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
99 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
100 /* runtime sections */ \
101 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
102 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
103 if (symtab && dynsym) { \
104 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \
105 } else { \
106 *sym = (void*)(symtab ? symtab : dynsym); \
107 } \
108 if (strtab && dynstr) { \
109 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \
110 } else { \
111 *tab = (void*)(strtab ? strtab : dynstr); \
112 } \
113 }
114 GET_SYMTABS(32)
115 GET_SYMTABS(64)
116}
117
83static char *scanelf_file_pax(elfobj *elf, char *found_pax) 118static char *scanelf_file_pax(elfobj *elf, char *found_pax)
84{ 119{
85 static char *paxflags;
86 static char ret[7]; 120 static char ret[7];
87 unsigned long i, shown; 121 unsigned long i, shown;
88
89 122
90 if (!show_pax) return NULL; 123 if (!show_pax) return NULL;
91 124
92 shown = 0; 125 shown = 0;
93 memset(&ret, 0, sizeof(ret)); 126 memset(&ret, 0, sizeof(ret));
98 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 131 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
99 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 132 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
100 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 133 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
101 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \ 134 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \
102 continue; \ 135 continue; \
103 if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \ 136 if (fix_elf && setpax) { \
137 /* set the paxctl flags */ \
138 ESET(phdr[i].p_flags, setpax); \
139 } \
140 if (be_quiet && (EGET(phdr[i].p_flags) == (PF_NOEMUTRAMP | PF_NORANDEXEC))) \
104 continue; \ 141 continue; \
105 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \ 142 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \
106 *found_pax = 1; \ 143 *found_pax = 1; \
107 ++shown; \ 144 ++shown; \
108 break; \ 145 break; \
110 } 147 }
111 SHOW_PAX(32) 148 SHOW_PAX(32)
112 SHOW_PAX(64) 149 SHOW_PAX(64)
113 } 150 }
114 151
152
153 if (fix_elf && setpax) {
154 /* set the chpax settings */
155 if (elf->elf_class == ELFCLASS32) {
156 if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC)
157 ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
158 } else {
159 if (EHDR64(elf->ehdr)->e_type == ET_DYN || EHDR64(elf->ehdr)->e_type == ET_EXEC)
160 ESET(EHDR64(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
161 }
162 }
163
115 /* fall back to EI_PAX if no PT_PAX was found */ 164 /* fall back to EI_PAX if no PT_PAX was found */
116 if (!*ret) { 165 if (!*ret) {
166 static char *paxflags;
117 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); 167 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
118 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) { 168 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
119 *found_pax = 1; 169 *found_pax = 1;
120 return paxflags; 170 return (be_wewy_wewy_quiet ? NULL : paxflags);
121 } 171 }
122 strncpy(ret, paxflags, sizeof(ret)); 172 strncpy(ret, paxflags, sizeof(ret));
123 // ++shown;
124 } 173 }
125 174
126 if (be_quiet && !shown) 175 if (be_wewy_wewy_quiet || (be_quiet && !shown))
127 return NULL; 176 return NULL;
177 else
128 return ret; 178 return ret;
129
130} 179}
180
131static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load) 181static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load)
132{ 182{
133 static char ret[12]; 183 static char ret[12];
134 char *found; 184 char *found;
135 unsigned long i, off, shown, check_flags;
136 unsigned char multi_stack, multi_relro, multi_load; 185 unsigned long i, shown, multi_stack, multi_relro, multi_load;
186 int max_pt_load;
137 187
138 if (!show_phdr) return NULL; 188 if (!show_phdr) return NULL;
139 189
140 memcpy(ret, "--- --- ---\0", 12); 190 memcpy(ret, "--- --- ---\0", 12);
141 191
142 shown = 0; 192 shown = 0;
143 multi_stack = multi_relro = multi_load = 0; 193 multi_stack = multi_relro = multi_load = 0;
194 max_pt_load = elf_max_pt_load(elf);
144 195
145 if (elf->phdr) { 196#define NOTE_GNU_STACK ".note.GNU-stack"
146#define SHOW_PHDR(B) \ 197#define SHOW_PHDR(B) \
147 if (elf->elf_class == ELFCLASS ## B) { \ 198 if (elf->elf_class == ELFCLASS ## B) { \
148 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 199 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
200 Elf ## B ## _Off offset; \
201 uint32_t flags, check_flags; \
202 if (elf->phdr != NULL) { \
149 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 203 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
150 uint32_t flags; \
151 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 204 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
152 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 205 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
206 if (multi_stack++) \
153 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ 207 warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
208 if (file_matches_list(elf->filename, qa_execstack)) \
209 continue; \
154 found = found_phdr; \ 210 found = found_phdr; \
155 off = 0; \ 211 offset = 0; \
156 check_flags = PF_X; \ 212 check_flags = PF_X; \
157 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \ 213 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
214 if (multi_relro++) \
158 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 215 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
159 found = found_relro; \ 216 found = found_relro; \
160 off = 4; \ 217 offset = 4; \
161 check_flags = PF_X; \ 218 check_flags = PF_X; \
162 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 219 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
163 if (multi_load++ > 2) warnf("%s: more than 2 PT_LOAD's !?", elf->filename); \ 220 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \
221 if (multi_load++ > max_pt_load) \
222 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
223 if (file_matches_list(elf->filename, qa_wx_load)) \
224 continue; \
164 found = found_load; \ 225 found = found_load; \
165 off = 8; \ 226 offset = 8; \
166 check_flags = PF_W|PF_X; \ 227 check_flags = PF_W|PF_X; \
167 } else \ 228 } else \
168 continue; \ 229 continue; \
169 flags = EGET(phdr[i].p_flags); \ 230 flags = EGET(phdr[i].p_flags); \
170 if (be_quiet && ((flags & check_flags) != check_flags)) \ 231 if (be_quiet && ((flags & check_flags) != check_flags)) \
171 continue; \ 232 continue; \
233 if ((EGET(phdr[i].p_type) != PT_LOAD) && (fix_elf && ((flags & PF_X) != flags))) { \
234 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \
235 ret[3] = ret[7] = '!'; \
236 flags = EGET(phdr[i].p_flags); \
237 } \
172 memcpy(ret+off, gnu_short_stack_flags(flags), 3); \ 238 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
173 *found = 1; \ 239 *found = 1; \
174 ++shown; \ 240 ++shown; \
241 } \
242 } else if (elf->shdr != NULL) { \
243 /* no program headers which means this is prob an object file */ \
244 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
245 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
246 char *str; \
247 if ((void*)strtbl > (void*)elf->data_end) \
248 goto skip_this_shdr##B; \
249 check_flags = SHF_WRITE|SHF_EXECINSTR; \
250 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
251 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
252 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
253 str = elf->data + offset; \
254 if (str > elf->data + offset + sizeof(NOTE_GNU_STACK)) continue; \
255 if (!strcmp(str, NOTE_GNU_STACK)) { \
256 if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \
257 flags = EGET(shdr[i].sh_flags); \
258 if (be_quiet && ((flags & check_flags) != check_flags)) \
259 continue; \
260 ++*found_phdr; \
261 shown = 1; \
262 if (flags & SHF_WRITE) ret[0] = 'W'; \
263 if (flags & SHF_ALLOC) ret[1] = 'A'; \
264 if (flags & SHF_EXECINSTR) ret[2] = 'X'; \
265 if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \
266 break; \
267 } \
268 } \
269 skip_this_shdr##B: \
270 if (!multi_stack) { \
271 if (file_matches_list(elf->filename, qa_execstack)) \
272 return NULL; \
273 *found_phdr = 1; \
274 shown = 1; \
275 memcpy(ret, "!WX", 3); \
276 } \
175 } \ 277 } \
176 } 278 }
177 SHOW_PHDR(32) 279 SHOW_PHDR(32)
178 SHOW_PHDR(64) 280 SHOW_PHDR(64)
179 }
180 281
181 if (be_quiet && !shown) 282 if (be_wewy_wewy_quiet || (be_quiet && !shown))
182 return NULL; 283 return NULL;
183 else 284 else
184 return ret; 285 return ret;
185} 286}
287
186static char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 288static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
187{ 289{
188 static char ret[] = "TEXTREL"; 290 static const char *ret = "TEXTREL";
189 unsigned long i; 291 unsigned long i;
190 292
191 if (!show_textrel) return NULL; 293 if (!show_textrel && !show_textrels) return NULL;
294
295 if (file_matches_list(elf->filename, qa_textrels)) return NULL;
192 296
193 if (elf->phdr) { 297 if (elf->phdr) {
194#define SHOW_TEXTREL(B) \ 298#define SHOW_TEXTREL(B) \
195 if (elf->elf_class == ELFCLASS ## B) { \ 299 if (elf->elf_class == ELFCLASS ## B) { \
196 Elf ## B ## _Dyn *dyn; \ 300 Elf ## B ## _Dyn *dyn; \
216 } 320 }
217 321
218 if (be_quiet || be_wewy_wewy_quiet) 322 if (be_quiet || be_wewy_wewy_quiet)
219 return NULL; 323 return NULL;
220 else 324 else
221 return (char *)" - "; 325 return " - ";
326}
327static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
328{
329 unsigned long s, r, rmax;
330 void *symtab_void, *strtab_void, *text_void;
331
332 if (!show_textrels) return NULL;
333
334 /* don't search for TEXTREL's if the ELF doesn't have any */
335 if (!*found_textrel) scanelf_file_textrel(elf, found_textrel);
336 if (!*found_textrel) return NULL;
337
338 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
339 text_void = elf_findsecbyname(elf, ".text");
340
341 if (symtab_void && strtab_void && text_void && elf->shdr) {
342#define SHOW_TEXTRELS(B) \
343 if (elf->elf_class == ELFCLASS ## B) { \
344 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
345 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
346 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
347 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
348 Elf ## B ## _Shdr *text = SHDR ## B (text_void); \
349 Elf ## B ## _Addr vaddr = EGET(text->sh_addr); \
350 uint ## B ## _t memsz = EGET(text->sh_size); \
351 Elf ## B ## _Rel *rel; \
352 Elf ## B ## _Rela *rela; \
353 /* search the section headers for relocations */ \
354 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
355 uint32_t sh_type = EGET(shdr[s].sh_type); \
356 if (sh_type == SHT_REL) { \
357 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \
358 rela = NULL; \
359 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
360 } else if (sh_type == SHT_RELA) { \
361 rel = NULL; \
362 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \
363 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
364 } else \
365 continue; \
366 /* now see if any of the relocs are in the .text */ \
367 for (r = 0; r < rmax; ++r) { \
368 unsigned long sym_max; \
369 Elf ## B ## _Addr offset_tmp; \
370 Elf ## B ## _Sym *func; \
371 Elf ## B ## _Sym *sym; \
372 Elf ## B ## _Addr r_offset; \
373 uint ## B ## _t r_info; \
374 if (sh_type == SHT_REL) { \
375 r_offset = EGET(rel[r].r_offset); \
376 r_info = EGET(rel[r].r_info); \
377 } else { \
378 r_offset = EGET(rela[r].r_offset); \
379 r_info = EGET(rela[r].r_info); \
380 } \
381 /* make sure this relocation is inside of the .text */ \
382 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
383 if (be_verbose <= 2) continue; \
384 } else \
385 *found_textrels = 1; \
386 /* locate this relocation symbol name */ \
387 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
388 if ((void*)sym > (void*)elf->data_end) { \
389 warn("%s: corrupt ELF symbol", elf->filename); \
390 continue; \
391 } \
392 sym_max = ELF ## B ## _R_SYM(r_info); \
393 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
394 sym += sym_max; \
395 else \
396 sym = NULL; \
397 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
398 /* show the raw details about this reloc */ \
399 printf(" %s: ", elf->base_filename); \
400 if (sym && sym->st_name) \
401 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \
402 else \
403 printf("(memory/fake?)"); \
404 printf(" [0x%lX]", (unsigned long)r_offset); \
405 /* now try to find the closest symbol that this rel is probably in */ \
406 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
407 func = NULL; \
408 offset_tmp = 0; \
409 while (sym_max--) { \
410 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
411 func = sym; \
412 offset_tmp = EGET(sym->st_value); \
413 } \
414 ++sym; \
415 } \
416 printf(" in "); \
417 if (func && func->st_name) \
418 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \
419 else \
420 printf("(NULL: fake?)"); \
421 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
422 } \
423 } }
424 SHOW_TEXTRELS(32)
425 SHOW_TEXTRELS(64)
426 }
427 if (!*found_textrels)
428 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
429
430 return NULL;
431}
432
433static void rpath_security_checks(elfobj *, char *, const char *);
434static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
435{
436 struct stat st;
437 switch (*item) {
438 case '/': break;
439 case '.':
440 warnf("Security problem with relative %s '%s' in %s", dt_type, item, elf->filename);
441 break;
442 case ':':
443 case '\0':
444 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
445 break;
446 case '$':
447 if (fstat(elf->fd, &st) != -1)
448 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
449 warnf("Security problem with %s='%s' in %s with mode set of %o",
450 dt_type, item, elf->filename, st.st_mode & 07777);
451 break;
452 default:
453 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
454 break;
455 }
222} 456}
223static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) 457static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
224{ 458{
225 unsigned long i, s; 459 unsigned long i, s;
226 char *rpath, *runpath, **r; 460 char *rpath, *runpath, **r;
260 /* Verify the memory is somewhat sane */ \ 494 /* Verify the memory is somewhat sane */ \
261 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 495 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
262 if (offset < (Elf ## B ## _Off)elf->len) { \ 496 if (offset < (Elf ## B ## _Off)elf->len) { \
263 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 497 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
264 *r = (char*)(elf->data + offset); \ 498 *r = (char*)(elf->data + offset); \
499 /* cache the length in case we need to nuke this section later on */ \
500 if (fix_elf) \
501 offset = strlen(*r); \
265 /* If quiet, don't output paths in ld.so.conf */ \ 502 /* If quiet, don't output paths in ld.so.conf */ \
266 if (be_quiet) { \ 503 if (be_quiet) { \
267 size_t len; \ 504 size_t len; \
268 char *start, *end; \ 505 char *start, *end; \
269 /* note that we only 'chop' off leading known paths. */ \ 506 /* note that we only 'chop' off leading known paths. */ \
270 /* since *r is read-only memory, we can only move the ptr forward. */ \ 507 /* since *r is read-only memory, we can only move the ptr forward. */ \
271 start = *r; \ 508 start = *r; \
272 /* scan each path in : delimited list */ \ 509 /* scan each path in : delimited list */ \
273 while (start) { \ 510 while (start) { \
511 rpath_security_checks(elf, start, get_elfdtype(word)); \
274 end = strchr(start, ':'); \ 512 end = strchr(start, ':'); \
275 len = (end ? abs(end - start) : strlen(start)); \ 513 len = (end ? abs(end - start) : strlen(start)); \
514 if (use_ldcache) \
276 for (s = 0; ldpaths[s]; ++s) { \ 515 for (s = 0; ldpaths[s]; ++s) \
277 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 516 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
278 *r = (end ? end + 1 : NULL); \ 517 *r = end; \
518 /* corner case ... if RPATH reads "/usr/lib:", we want \
519 * to show ':' rather than '' */ \
520 if (end && end[1] != '\0') \
521 (*r)++; \
279 break; \ 522 break; \
280 } \ 523 } \
281 } \
282 if (!*r || !ldpaths[s] || !end) \ 524 if (!*r || !end) \
283 start = NULL; \ 525 break; \
284 else \ 526 else \
285 start = start + len + 1; \ 527 start = start + len + 1; \
286 } \ 528 } \
287 } \ 529 } \
530 if (*r) { \
531 if (fix_elf > 2 || (fix_elf && **r == '\0')) { \
532 /* just nuke it */ \
533 nuke_it##B: \
534 memset(*r, 0x00, offset); \
535 *r = NULL; \
536 ESET(dyn->d_tag, DT_DEBUG); \
537 ESET(dyn->d_un.d_ptr, 0); \
538 } else if (fix_elf) { \
539 /* try to clean "bad" paths */ \
540 size_t len, tmpdir_len; \
541 char *start, *end; \
542 const char *tmpdir; \
543 start = *r; \
544 tmpdir = (getenv("TMPDIR") ? : "."); \
545 tmpdir_len = strlen(tmpdir); \
546 while (1) { \
547 end = strchr(start, ':'); \
548 if (start == end) { \
549 eat_this_path##B: \
550 len = strlen(end); \
551 memmove(start, end+1, len); \
552 start[len-1] = '\0'; \
553 end = start - 1; \
554 } else if (tmpdir && !strncmp(start, tmpdir, tmpdir_len)) { \
555 if (!end) { \
556 if (start == *r) \
557 goto nuke_it##B; \
558 *--start = '\0'; \
559 } else \
560 goto eat_this_path##B; \
561 } \
562 if (!end) \
563 break; \
564 start = end + 1; \
565 } \
566 if (**r == '\0') \
567 goto nuke_it##B; \
568 } \
569 if (*r) \
288 if (*r) *found_rpath = 1; \ 570 *found_rpath = 1; \
571 } \
289 } \ 572 } \
290 ++dyn; \ 573 ++dyn; \
291 } \ 574 } \
292 } } 575 } }
293 SHOW_RPATH(32) 576 SHOW_RPATH(32)
310 } else if (rpath || runpath) 593 } else if (rpath || runpath)
311 xstrcat(ret, (runpath ? runpath : rpath), ret_len); 594 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
312 else if (!be_quiet) 595 else if (!be_quiet)
313 xstrcat(ret, " - ", ret_len); 596 xstrcat(ret, " - ", ret_len);
314} 597}
598
599#define LDSO_CACHE_MAGIC "ld.so-"
600#define LDSO_CACHE_MAGIC_LEN (sizeof LDSO_CACHE_MAGIC -1)
601#define LDSO_CACHE_VER "1.7.0"
602#define LDSO_CACHE_VER_LEN (sizeof LDSO_CACHE_VER -1)
603#define FLAG_ANY -1
604#define FLAG_TYPE_MASK 0x00ff
605#define FLAG_LIBC4 0x0000
606#define FLAG_ELF 0x0001
607#define FLAG_ELF_LIBC5 0x0002
608#define FLAG_ELF_LIBC6 0x0003
609#define FLAG_REQUIRED_MASK 0xff00
610#define FLAG_SPARC_LIB64 0x0100
611#define FLAG_IA64_LIB64 0x0200
612#define FLAG_X8664_LIB64 0x0300
613#define FLAG_S390_LIB64 0x0400
614#define FLAG_POWERPC_LIB64 0x0500
615#define FLAG_MIPS64_LIBN32 0x0600
616#define FLAG_MIPS64_LIBN64 0x0700
617
618static char *lookup_cache_lib(elfobj *, char *);
619
620#if defined(__GLIBC__) || defined(__UCLIBC__)
621
622static char *lookup_cache_lib(elfobj *elf, char *fname)
623{
624 int fd = 0;
625 char *strs;
626 static char buf[__PAX_UTILS_PATH_MAX] = "";
627 const char *cachefile = "/etc/ld.so.cache";
628 struct stat st;
629
630 typedef struct {
631 char magic[LDSO_CACHE_MAGIC_LEN];
632 char version[LDSO_CACHE_VER_LEN];
633 int nlibs;
634 } header_t;
635 header_t *header;
636
637 typedef struct {
638 int flags;
639 int sooffset;
640 int liboffset;
641 } libentry_t;
642 libentry_t *libent;
643
644 if (fname == NULL)
645 return NULL;
646
647 if (ldcache == 0) {
648 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1)
649 return NULL;
650
651 /* cache these values so we only map/unmap the cache file once */
652 ldcache_size = st.st_size;
653 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
654
655 close(fd);
656
657 if (ldcache == (caddr_t)-1) {
658 ldcache = 0;
659 return NULL;
660 }
661
662 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN))
663 return NULL;
664 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
665 return NULL;
666 }
667
668 header = (header_t *) ldcache;
669 libent = (libentry_t *) (ldcache + sizeof(header_t));
670 strs = (char *) &libent[header->nlibs];
671
672 for (fd = 0; fd < header->nlibs; fd++) {
673 /* this should be more fine grained, but for now we assume that
674 * diff arches will not be cached together. and we ignore the
675 * the different multilib mips cases. */
676 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
677 continue;
678 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
679 continue;
680
681 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
682 continue;
683 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
684 }
685 return buf;
686}
687#elif defined(__NetBSD__)
688static char *lookup_cache_lib(elfobj *elf, char *fname)
689{
690 static char buf[__PAX_UTILS_PATH_MAX] = "";
691 static struct stat st;
692
693 char **ldpath;
694 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) {
695 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", *ldpath, fname) >= sizeof(buf))
696 continue; /* if the pathname is too long, or something went wrong, ignore */
697
698 if (stat(buf, &st) != 0)
699 continue; /* if the lib doesn't exist in *ldpath, look further */
700
701 /* NetBSD doesn't actually do sanity checks, it just loads the file
702 * and if that doesn't work, continues looking in other directories.
703 * This cannot easily be safely emulated, unfortunately. For now,
704 * just assume that if it exists, it's a valid library. */
705
706 return buf;
707 }
708
709 /* not found in any path */
710 return NULL;
711}
712#else
713#warning Cache support not implemented for your target
714static char *lookup_cache_lib(elfobj *elf, char *fname)
715{
716 return NULL;
717}
718#endif
719
315static char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len) 720static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
316{ 721{
317 unsigned long i; 722 unsigned long i;
318 char *needed; 723 char *needed;
319 void *strtbl_void; 724 void *strtbl_void;
725 char *p;
320 726
321 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 727 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
322 728
323 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 729 strtbl_void = elf_findsecbyname(elf, ".dynstr");
324 730
344 } \ 750 } \
345 needed = (char*)(elf->data + offset); \ 751 needed = (char*)(elf->data + offset); \
346 if (op == 0) { \ 752 if (op == 0) { \
347 if (!be_wewy_wewy_quiet) { \ 753 if (!be_wewy_wewy_quiet) { \
348 if (*found_needed) xchrcat(ret, ',', ret_len); \ 754 if (*found_needed) xchrcat(ret, ',', ret_len); \
755 if (use_ldcache) \
756 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
757 needed = p; \
349 xstrcat(ret, needed, ret_len); \ 758 xstrcat(ret, needed, ret_len); \
350 } \ 759 } \
351 *found_needed = 1; \ 760 *found_needed = 1; \
352 } else { \ 761 } else { \
353 if (strcmp(find_lib, needed)) return NULL; \ 762 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \
354 *found_lib = 1; \ 763 *found_lib = 1; \
355 return (be_wewy_wewy_quiet ? NULL : find_lib); \ 764 return (be_wewy_wewy_quiet ? NULL : needed); \
765 } \
356 } \ 766 } \
357 } \ 767 } \
358 ++dyn; \ 768 ++dyn; \
359 } \ 769 } \
360 } } 770 } }
361 SHOW_NEEDED(32) 771 SHOW_NEEDED(32)
362 SHOW_NEEDED(64) 772 SHOW_NEEDED(64)
773 if (op == 0 && !*found_needed && be_verbose)
774 warn("ELF lacks DT_NEEDED sections: %s", elf->filename);
363 } 775 }
364 776
365 return NULL; 777 return NULL;
366} 778}
367static char *scanelf_file_interp(elfobj *elf, char *found_interp) 779static char *scanelf_file_interp(elfobj *elf, char *found_interp)
386} 798}
387static char *scanelf_file_bind(elfobj *elf, char *found_bind) 799static char *scanelf_file_bind(elfobj *elf, char *found_bind)
388{ 800{
389 unsigned long i; 801 unsigned long i;
390 struct stat s; 802 struct stat s;
803 char dynamic = 0;
391 804
392 if (!show_bind) return NULL; 805 if (!show_bind) return NULL;
393 if (!elf->phdr) return NULL; 806 if (!elf->phdr) return NULL;
394 807
395#define SHOW_BIND(B) \ 808#define SHOW_BIND(B) \
398 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 811 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
399 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 812 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
400 Elf ## B ## _Off offset; \ 813 Elf ## B ## _Off offset; \
401 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 814 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
402 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 815 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
816 dynamic = 1; \
403 offset = EGET(phdr[i].p_offset); \ 817 offset = EGET(phdr[i].p_offset); \
404 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 818 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
405 dyn = DYN ## B (elf->data + offset); \ 819 dyn = DYN ## B (elf->data + offset); \
406 while (EGET(dyn->d_tag) != DT_NULL) { \ 820 while (EGET(dyn->d_tag) != DT_NULL) { \
407 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 821 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
418 SHOW_BIND(32) 832 SHOW_BIND(32)
419 SHOW_BIND(64) 833 SHOW_BIND(64)
420 834
421 if (be_wewy_wewy_quiet) return NULL; 835 if (be_wewy_wewy_quiet) return NULL;
422 836
837 /* don't output anything if quiet mode and the ELF is static or not setuid */
423 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) { 838 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
424 return NULL; 839 return NULL;
425 } else { 840 } else {
426 *found_bind = 1; 841 *found_bind = 1;
427 return (char *) "LAZY"; 842 return (char *) (dynamic ? "LAZY" : "STATIC");
428 } 843 }
844}
845static char *scanelf_file_soname(elfobj *elf, char *found_soname)
846{
847 unsigned long i;
848 char *soname;
849 void *strtbl_void;
850
851 if (!show_soname) return NULL;
852
853 strtbl_void = elf_findsecbyname(elf, ".dynstr");
854
855 if (elf->phdr && strtbl_void) {
856#define SHOW_SONAME(B) \
857 if (elf->elf_class == ELFCLASS ## B) { \
858 Elf ## B ## _Dyn *dyn; \
859 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
860 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
861 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
862 Elf ## B ## _Off offset; \
863 /* only look for soname in shared objects */ \
864 if (ehdr->e_type != ET_DYN) \
865 return NULL; \
866 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
867 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
868 offset = EGET(phdr[i].p_offset); \
869 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
870 dyn = DYN ## B (elf->data + offset); \
871 while (EGET(dyn->d_tag) != DT_NULL) { \
872 if (EGET(dyn->d_tag) == DT_SONAME) { \
873 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
874 if (offset >= (Elf ## B ## _Off)elf->len) { \
875 ++dyn; \
876 continue; \
877 } \
878 soname = (char*)(elf->data + offset); \
879 *found_soname = 1; \
880 return (be_wewy_wewy_quiet ? NULL : soname); \
881 } \
882 ++dyn; \
883 } \
884 } }
885 SHOW_SONAME(32)
886 SHOW_SONAME(64)
887 }
888
889 return NULL;
429} 890}
430static char *scanelf_file_sym(elfobj *elf, char *found_sym) 891static char *scanelf_file_sym(elfobj *elf, char *found_sym)
431{ 892{
432 unsigned long i; 893 unsigned long i;
894 char *ret;
433 void *symtab_void, *strtab_void; 895 void *symtab_void, *strtab_void;
434 896
435 if (!find_sym) return NULL; 897 if (!find_sym) return NULL;
898 ret = find_sym;
436 899
437 /* debug sections */ 900 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
438 symtab_void = elf_findsecbyname(elf, ".symtab");
439 strtab_void = elf_findsecbyname(elf, ".strtab");
440 /* fall back to runtime sections */
441 if (!symtab_void || !strtab_void) {
442 symtab_void = elf_findsecbyname(elf, ".dynsym");
443 strtab_void = elf_findsecbyname(elf, ".dynstr");
444 }
445 901
446 if (symtab_void && strtab_void) { 902 if (symtab_void && strtab_void) {
447 char *base, *basemem;
448 basemem = xstrdup(elf->filename);
449 base = basename(basemem);
450#define FIND_SYM(B) \ 903#define FIND_SYM(B) \
451 if (elf->elf_class == ELFCLASS ## B) { \ 904 if (elf->elf_class == ELFCLASS ## B) { \
452 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 905 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
453 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 906 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
454 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 907 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
455 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 908 unsigned long cnt = EGET(symtab->sh_entsize); \
456 char *symname; \ 909 char *symname; \
910 if (cnt) \
911 cnt = EGET(symtab->sh_size) / cnt; \
457 for (i = 0; i < cnt; ++i) { \ 912 for (i = 0; i < cnt; ++i) { \
458 if (sym->st_name) { \ 913 if (sym->st_name) { \
914 /* make sure the symbol name is in acceptable memory range */ \
459 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 915 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
916 if ((void*)symname > (void*)elf->data_end) { \
917 warnf("%s: corrupt ELF symbols", elf->filename); \
918 ++sym; \
919 continue; \
920 } \
921 /* debug display ... show all symbols and some extra info */ \
460 if (*find_sym == '*') { \ 922 if (*ret == '*') { \
461 printf("%s(%s) %5lX %15s %s\n", \ 923 printf("%s(%s) %5lX %15s %s\n", \
462 ((*found_sym == 0) ? "\n\t" : "\t"), \ 924 ((*found_sym == 0) ? "\n\t" : "\t"), \
463 base, \ 925 elf->base_filename, \
464 (long)sym->st_size, \ 926 (unsigned long)sym->st_size, \
465 (char *)get_elfstttype(sym->st_info), \ 927 get_elfstttype(sym->st_info), \
466 symname); \ 928 symname); \
467 *found_sym = 1; \ 929 *found_sym = 1; \
468 } else if ((strcmp(find_sym, symname) == 0) || \ 930 } else { \
469 (strcmp(symname, versioned_symname) == 0)) \ 931 /* allow the user to specify a comma delimited list of symbols to search for */ \
932 char *this_sym, *this_sym_ver, *next_sym; \
933 this_sym = ret; \
934 this_sym_ver = versioned_symname; \
935 do { \
936 next_sym = strchr(this_sym, ','); \
937 if (next_sym == NULL) \
938 next_sym = this_sym + strlen(this_sym); \
939 /* do we want a defined symbol ? */ \
940 if (*this_sym == '+') { \
941 if (sym->st_shndx == SHN_UNDEF) \
942 goto skip_this_sym##B; \
943 ++this_sym; \
944 ++this_sym_ver; \
945 /* do we want an undefined symbol ? */ \
946 } else if (*this_sym == '-') { \
947 if (sym->st_shndx != SHN_UNDEF) \
948 goto skip_this_sym##B; \
949 ++this_sym; \
950 ++this_sym_ver; \
951 } \
952 /* ok, lets compare the name now */ \
953 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
954 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
955 if (be_semi_verbose) { \
956 char buf[126]; \
957 snprintf(buf, sizeof(buf), "%lX %s %s", \
958 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
959 ret = buf; \
960 } else \
961 ret = this_sym; \
470 (*found_sym)++; \ 962 (*found_sym)++; \
963 goto break_out; \
964 } \
965 skip_this_sym##B: this_sym = next_sym + 1; \
966 } while (*next_sym != '\0'); \
967 } \
471 } \ 968 } \
472 ++sym; \ 969 ++sym; \
473 } } 970 } }
474 FIND_SYM(32) 971 FIND_SYM(32)
475 FIND_SYM(64) 972 FIND_SYM(64)
476 free(basemem);
477 } 973 }
478 974
975break_out:
479 if (be_wewy_wewy_quiet) return NULL; 976 if (be_wewy_wewy_quiet) return NULL;
480 977
481 if (*find_sym != '*' && *found_sym) 978 if (*find_sym != '*' && *found_sym)
482 return find_sym; 979 return ret;
483 if (be_quiet) 980 if (be_quiet)
484 return NULL; 981 return NULL;
485 else 982 else
486 return (char *)" - "; 983 return (char *)" - ";
487} 984}
985
986
987static char *scanelf_file_sections(elfobj *elf, char *found_section)
988{
989 if (!find_section)
990 return NULL;
991
992#define FIND_SECTION(B) \
993 if (elf->elf_class == ELFCLASS ## B) { \
994 int invert; \
995 Elf ## B ## _Shdr *section; \
996 invert = (*find_section == '!' ? 1 : 0); \
997 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \
998 if ((section == NULL && invert) || (section != NULL && !invert)) \
999 *found_section = 1; \
1000 }
1001 FIND_SECTION(32)
1002 FIND_SECTION(64)
1003
1004 if (be_wewy_wewy_quiet)
1005 return NULL;
1006
1007 if (*found_section)
1008 return find_section;
1009
1010 if (be_quiet)
1011 return NULL;
1012 else
1013 return (char *)" - ";
1014}
1015
488/* scan an elf file and show all the fun stuff */ 1016/* scan an elf file and show all the fun stuff */
489#define prints(str) write(fileno(stdout), str, strlen(str)) 1017#define prints(str) write(fileno(stdout), str, strlen(str))
490static void scanelf_file(const char *filename) 1018static int scanelf_elfobj(elfobj *elf)
491{ 1019{
492 unsigned long i; 1020 unsigned long i;
493 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1021 char found_pax, found_phdr, found_relro, found_load, found_textrel,
494 found_rpath, found_needed, found_interp, found_bind, 1022 found_rpath, found_needed, found_interp, found_bind, found_soname,
495 found_sym, found_lib, found_file; 1023 found_sym, found_lib, found_file, found_textrels, found_section;
496 elfobj *elf;
497 struct stat st;
498 static char *out_buffer = NULL; 1024 static char *out_buffer = NULL;
499 static size_t out_len; 1025 static size_t out_len;
500 1026
501 /* make sure 'filename' exists */
502 if (lstat(filename, &st) == -1) {
503 if (be_verbose > 2) printf("%s: does not exist\n", filename);
504 return;
505 }
506 /* always handle regular files and handle symlinked files if no -y */
507 if (S_ISLNK(st.st_mode)) {
508 if (!scan_symlink) return;
509 stat(filename, &st);
510 }
511 if (!S_ISREG(st.st_mode)) {
512 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
513 return;
514 }
515
516 found_pax = found_phdr = found_relro = found_load = \ 1027 found_pax = found_phdr = found_relro = found_load = found_textrel = \
517 found_textrel = found_rpath = found_needed = found_interp = \ 1028 found_rpath = found_needed = found_interp = found_bind = found_soname = \
518 found_bind = found_sym = found_lib = found_file = 0; 1029 found_sym = found_lib = found_file = found_textrels = found_section = 0;
519 1030
520 /* verify this is real ELF */
521 if ((elf = readelf(filename)) == NULL) {
522 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
523 return;
524 }
525
526 if (be_verbose > 1) 1031 if (be_verbose > 2)
527 printf("%s: scanning file {%s,%s}\n", filename, 1032 printf("%s: scanning file {%s,%s}\n", elf->filename,
528 get_elfeitype(EI_CLASS, elf->elf_class), 1033 get_elfeitype(EI_CLASS, elf->elf_class),
529 get_elfeitype(EI_DATA, elf->data[EI_DATA])); 1034 get_elfeitype(EI_DATA, elf->data[EI_DATA]));
530 else if (be_verbose) 1035 else if (be_verbose > 1)
531 printf("%s: scanning file\n", filename); 1036 printf("%s: scanning file\n", elf->filename);
532 1037
533 /* init output buffer */ 1038 /* init output buffer */
534 if (!out_buffer) { 1039 if (!out_buffer) {
535 out_len = sizeof(char) * 80; 1040 out_len = sizeof(char) * 80;
536 out_buffer = (char*)xmalloc(out_len); 1041 out_buffer = (char*)xmalloc(out_len);
541 if (!be_quiet && show_banner) { 1046 if (!be_quiet && show_banner) {
542 for (i = 0; out_format[i]; ++i) { 1047 for (i = 0; out_format[i]; ++i) {
543 if (!IS_MODIFIER(out_format[i])) continue; 1048 if (!IS_MODIFIER(out_format[i])) continue;
544 1049
545 switch (out_format[++i]) { 1050 switch (out_format[++i]) {
1051 case '+': break;
546 case '%': break; 1052 case '%': break;
547 case '#': break; 1053 case '#': break;
548 case 'F': 1054 case 'F':
549 case 'p': 1055 case 'p':
550 case 'f': prints("FILE "); found_file = 1; break; 1056 case 'f': prints("FILE "); found_file = 1; break;
554 case 't': prints("TEXTREL "); break; 1060 case 't': prints("TEXTREL "); break;
555 case 'r': prints("RPATH "); break; 1061 case 'r': prints("RPATH "); break;
556 case 'n': prints("NEEDED "); break; 1062 case 'n': prints("NEEDED "); break;
557 case 'i': prints("INTERP "); break; 1063 case 'i': prints("INTERP "); break;
558 case 'b': prints("BIND "); break; 1064 case 'b': prints("BIND "); break;
1065 case 'S': prints("SONAME "); break;
559 case 's': prints("SYM "); break; 1066 case 's': prints("SYM "); break;
560 case 'N': prints("LIB "); break; 1067 case 'N': prints("LIB "); break;
1068 case 'T': prints("TEXTRELS "); break;
1069 case 'k': prints("SECTION "); break;
1070 default: warnf("'%c' has no title ?", out_format[i]);
561 } 1071 }
562 } 1072 }
563 if (!found_file) prints("FILE "); 1073 if (!found_file) prints("FILE ");
564 prints("\n"); 1074 prints("\n");
565 found_file = 0; 1075 found_file = 0;
569 /* dump all the good stuff */ 1079 /* dump all the good stuff */
570 for (i = 0; out_format[i]; ++i) { 1080 for (i = 0; out_format[i]; ++i) {
571 const char *out; 1081 const char *out;
572 const char *tmp; 1082 const char *tmp;
573 1083
574 /* make sure we trim leading spaces in quiet mode */
575 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
576 *out_buffer = '\0';
577
578 if (!IS_MODIFIER(out_format[i])) { 1084 if (!IS_MODIFIER(out_format[i])) {
579 xchrcat(&out_buffer, out_format[i], &out_len); 1085 xchrcat(&out_buffer, out_format[i], &out_len);
580 continue; 1086 continue;
581 } 1087 }
582 1088
583 out = NULL; 1089 out = NULL;
584 be_wewy_wewy_quiet = (out_format[i] == '#'); 1090 be_wewy_wewy_quiet = (out_format[i] == '#');
1091 be_semi_verbose = (out_format[i] == '+');
585 switch (out_format[++i]) { 1092 switch (out_format[++i]) {
1093 case '+':
586 case '%': 1094 case '%':
587 case '#': 1095 case '#':
588 xchrcat(&out_buffer, out_format[i], &out_len); break; 1096 xchrcat(&out_buffer, out_format[i], &out_len); break;
589 case 'F': 1097 case 'F':
1098 found_file = 1;
590 if (be_wewy_wewy_quiet) break; 1099 if (be_wewy_wewy_quiet) break;
1100 xstrcat(&out_buffer, elf->filename, &out_len);
1101 break;
1102 case 'p':
591 found_file = 1; 1103 found_file = 1;
592 xstrcat(&out_buffer, filename, &out_len);
593 break;
594 case 'p':
595 if (be_wewy_wewy_quiet) break; 1104 if (be_wewy_wewy_quiet) break;
596 found_file = 1;
597 tmp = filename; 1105 tmp = elf->filename;
598 if (search_path) { 1106 if (search_path) {
599 ssize_t len_search = strlen(search_path); 1107 ssize_t len_search = strlen(search_path);
600 ssize_t len_file = strlen(filename); 1108 ssize_t len_file = strlen(elf->filename);
601 if (!strncmp(filename, search_path, len_search) && \ 1109 if (!strncmp(elf->filename, search_path, len_search) && \
602 len_file > len_search) 1110 len_file > len_search)
603 tmp += len_search; 1111 tmp += len_search;
604 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++; 1112 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
605 } 1113 }
606 xstrcat(&out_buffer, tmp, &out_len); 1114 xstrcat(&out_buffer, tmp, &out_len);
607 break; 1115 break;
608 case 'f': 1116 case 'f':
1117 found_file = 1;
609 if (be_wewy_wewy_quiet) break; 1118 if (be_wewy_wewy_quiet) break;
610 found_file = 1;
611 tmp = strrchr(filename, '/'); 1119 tmp = strrchr(elf->filename, '/');
612 tmp = (tmp == NULL ? filename : tmp+1); 1120 tmp = (tmp == NULL ? elf->filename : tmp+1);
613 xstrcat(&out_buffer, tmp, &out_len); 1121 xstrcat(&out_buffer, tmp, &out_len);
614 break; 1122 break;
615 case 'o': out = get_elfetype(elf); break; 1123 case 'o': out = get_elfetype(elf); break;
616 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1124 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
617 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break; 1125 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
618 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1126 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1127 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
619 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 1128 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
620 case 'n': 1129 case 'n':
621 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; 1130 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
622 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1131 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
623 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1132 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1133 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
624 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1134 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1135 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1136 default: warnf("'%c' has no scan code?", out_format[i]);
625 } 1137 }
1138 if (out) {
1139 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1140 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1141 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1142 else
626 if (out) xstrcat(&out_buffer, out, &out_len); 1143 xstrcat(&out_buffer, out, &out_len);
1144 }
627 } 1145 }
628 1146
629#define FOUND_SOMETHING() \ 1147#define FOUND_SOMETHING() \
630 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1148 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
631 found_rpath || found_needed || found_interp || found_bind || found_sym || found_lib) 1149 found_rpath || found_needed || found_interp || found_bind || \
1150 found_soname || found_sym || found_lib || found_textrels || found_section )
632 1151
633 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { 1152 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
634 xchrcat(&out_buffer, ' ', &out_len); 1153 xchrcat(&out_buffer, ' ', &out_len);
635 xstrcat(&out_buffer, filename, &out_len); 1154 xstrcat(&out_buffer, elf->filename, &out_len);
636 } 1155 }
637 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) 1156 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
638 puts(out_buffer); 1157 puts(out_buffer);
1158 fflush(stdout);
1159 }
639 1160
1161 return 0;
1162}
1163
1164/* scan a single elf */
1165static int scanelf_elf(const char *filename, int fd, size_t len)
1166{
1167 int ret = 1;
1168 elfobj *elf;
1169
1170 /* verify this is real ELF */
1171 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1172 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1173 return ret;
1174 }
1175 switch (match_bits) {
1176 case 32:
1177 if (elf->elf_class != ELFCLASS32)
1178 goto label_done;
1179 break;
1180 case 64:
1181 if (elf->elf_class != ELFCLASS64)
1182 goto label_done;
1183 break;
1184 default: break;
1185 }
1186 if (strlen(match_etypes)) {
1187 char sbuf[126];
1188 strncpy(sbuf, match_etypes, sizeof(sbuf));
1189 if (strchr(match_etypes, ',') != NULL) {
1190 char *p;
1191 while((p = strrchr(sbuf, ',')) != NULL) {
1192 *p = 0;
1193 if (etype_lookup(p+1) == get_etype(elf))
1194 goto label_ret;
1195 }
1196 }
1197 if (etype_lookup(sbuf) != get_etype(elf))
1198 goto label_done;
1199 }
1200
1201label_ret:
1202 ret = scanelf_elfobj(elf);
1203
1204label_done:
640 unreadelf(elf); 1205 unreadelf(elf);
1206 return ret;
1207}
1208
1209/* scan an archive of elfs */
1210static int scanelf_archive(const char *filename, int fd, size_t len)
1211{
1212 archive_handle *ar;
1213 archive_member *m;
1214 char *ar_buffer;
1215 elfobj *elf;
1216
1217 ar = ar_open_fd(filename, fd);
1218 if (ar == NULL)
1219 return 1;
1220
1221 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1222 while ((m=ar_next(ar)) != NULL) {
1223 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1224 if (elf) {
1225 scanelf_elfobj(elf);
1226 unreadelf(elf);
1227 }
1228 }
1229 munmap(ar_buffer, len);
1230
1231 return 0;
1232}
1233/* scan a file which may be an elf or an archive or some other magical beast */
1234static int scanelf_file(const char *filename, const struct stat *st_cache)
1235{
1236 const struct stat *st = st_cache;
1237 struct stat symlink_st;
1238 int fd;
1239
1240 /* always handle regular files and handle symlinked files if no -y */
1241 if (S_ISLNK(st->st_mode)) {
1242 if (!scan_symlink) return 1;
1243 stat(filename, &symlink_st);
1244 st = &symlink_st;
1245 }
1246
1247 if (!S_ISREG(st->st_mode)) {
1248 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1249 return 1;
1250 }
1251
1252 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1253 return 1;
1254
1255 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1256 /* if it isn't an ELF, maybe it's an .a archive */
1257 scanelf_archive(filename, fd, st->st_size);
1258
1259 close(fd);
1260 return 0;
641} 1261}
642 1262
643/* scan a directory for ET_EXEC files and print when we find one */ 1263/* scan a directory for ET_EXEC files and print when we find one */
644static void scanelf_dir(const char *path) 1264static int scanelf_dir(const char *path)
645{ 1265{
646 register DIR *dir; 1266 register DIR *dir;
647 register struct dirent *dentry; 1267 register struct dirent *dentry;
648 struct stat st_top, st; 1268 struct stat st_top, st;
649 char buf[_POSIX_PATH_MAX]; 1269 char buf[__PAX_UTILS_PATH_MAX];
650 size_t pathlen = 0, len = 0; 1270 size_t pathlen = 0, len = 0;
1271 int ret = 0;
651 1272
652 /* make sure path exists */ 1273 /* make sure path exists */
653 if (lstat(path, &st_top) == -1) { 1274 if (lstat(path, &st_top) == -1) {
654 if (be_verbose > 2) printf("%s: does not exist\n", path); 1275 if (be_verbose > 2) printf("%s: does not exist\n", path);
655 return; 1276 return 1;
656 } 1277 }
657 1278
658 /* ok, if it isn't a directory, assume we can open it */ 1279 /* ok, if it isn't a directory, assume we can open it */
659 if (!S_ISDIR(st_top.st_mode)) { 1280 if (!S_ISDIR(st_top.st_mode)) {
660 scanelf_file(path); 1281 return scanelf_file(path, &st_top);
661 return;
662 } 1282 }
663 1283
664 /* now scan the dir looking for fun stuff */ 1284 /* now scan the dir looking for fun stuff */
665 if ((dir = opendir(path)) == NULL) { 1285 if ((dir = opendir(path)) == NULL) {
666 warnf("could not opendir %s: %s", path, strerror(errno)); 1286 warnf("could not opendir %s: %s", path, strerror(errno));
667 return; 1287 return 1;
668 } 1288 }
669 if (be_verbose) printf("%s: scanning dir\n", path); 1289 if (be_verbose > 1) printf("%s: scanning dir\n", path);
670 1290
671 pathlen = strlen(path); 1291 pathlen = strlen(path);
672 while ((dentry = readdir(dir))) { 1292 while ((dentry = readdir(dir))) {
673 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 1293 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
674 continue; 1294 continue;
675 len = (pathlen + 1 + strlen(dentry->d_name) + 1); 1295 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
676 if (len >= sizeof(buf)) { 1296 if (len >= sizeof(buf)) {
677 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, len, sizeof(buf)); 1297 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1298 (unsigned long)len, (unsigned long)sizeof(buf));
678 continue; 1299 continue;
679 } 1300 }
680 sprintf(buf, "%s/%s", path, dentry->d_name); 1301 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
681 if (lstat(buf, &st) != -1) { 1302 if (lstat(buf, &st) != -1) {
682 if (S_ISREG(st.st_mode)) 1303 if (S_ISREG(st.st_mode))
683 scanelf_file(buf); 1304 ret = scanelf_file(buf, &st);
684 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1305 else if (dir_recurse && S_ISDIR(st.st_mode)) {
685 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1306 if (dir_crossmount || (st_top.st_dev == st.st_dev))
686 scanelf_dir(buf); 1307 ret = scanelf_dir(buf);
687 } 1308 }
688 } 1309 }
689 } 1310 }
690 closedir(dir); 1311 closedir(dir);
1312 return ret;
691} 1313}
692 1314
693static int scanelf_from_file(char *filename) 1315static int scanelf_from_file(const char *filename)
694{ 1316{
695 FILE *fp = NULL; 1317 FILE *fp = NULL;
696 char *p; 1318 char *p;
697 char path[_POSIX_PATH_MAX]; 1319 char path[__PAX_UTILS_PATH_MAX];
1320 int ret = 0;
698 1321
699 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) 1322 if (strcmp(filename, "-") == 0)
700 fp = stdin; 1323 fp = stdin;
701 else if ((fp = fopen(filename, "r")) == NULL) 1324 else if ((fp = fopen(filename, "r")) == NULL)
702 return 1; 1325 return 1;
703 1326
704 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1327 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
705 if ((p = strchr(path, '\n')) != NULL) 1328 if ((p = strchr(path, '\n')) != NULL)
706 *p = 0; 1329 *p = 0;
707 search_path = path; 1330 search_path = path;
708 scanelf_dir(path); 1331 ret = scanelf_dir(path);
709 } 1332 }
710 if (fp != stdin) 1333 if (fp != stdin)
711 fclose(fp); 1334 fclose(fp);
712 return 0; 1335 return ret;
713} 1336}
714 1337
715static void load_ld_so_conf() 1338#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1339
1340static int load_ld_cache_config(int i, const char *fname)
716{ 1341{
717 FILE *fp = NULL; 1342 FILE *fp = NULL;
718 char *p; 1343 char *p;
719 char path[_POSIX_PATH_MAX]; 1344 char path[__PAX_UTILS_PATH_MAX];
720 int i = 0;
721 1345
722 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 1346 if (i + 1 == ARRAY_SIZE(ldpaths))
723 return; 1347 return i;
724 1348
1349 if ((fp = fopen(fname, "r")) == NULL)
1350 return i;
1351
725 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1352 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
726 if (*path != '/')
727 continue;
728
729 if ((p = strrchr(path, '\r')) != NULL) 1353 if ((p = strrchr(path, '\r')) != NULL)
730 *p = 0; 1354 *p = 0;
731 if ((p = strchr(path, '\n')) != NULL) 1355 if ((p = strchr(path, '\n')) != NULL)
732 *p = 0; 1356 *p = 0;
1357#ifdef __linux__
1358 // recursive includes of the same file will make this segfault.
1359 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1360 glob64_t gl;
1361 size_t x;
1362 char gpath[__PAX_UTILS_PATH_MAX];
1363
1364 memset(gpath, 0, sizeof(gpath));
1365
1366 if (path[8] != '/')
1367 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]);
1368 else
1369 strncpy(gpath, &path[8], sizeof(gpath));
1370
1371 if ((glob64(gpath, 0, NULL, &gl)) == 0) {
1372 for (x = 0; x < gl.gl_pathc; ++x) {
1373 /* try to avoid direct loops */
1374 if (strcmp(gl.gl_pathv[x], fname) == 0)
1375 continue;
1376 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1377 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1378 globfree64(&gl);
1379 return i;
1380 }
1381 }
1382 globfree64 (&gl);
1383 continue;
1384 }
1385 }
1386#endif
1387 if (*path != '/')
1388 continue;
733 1389
734 ldpaths[i++] = xstrdup(path); 1390 ldpaths[i++] = xstrdup(path);
735 1391
736 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1392 if (i + 1 == ARRAY_SIZE(ldpaths))
737 break; 1393 break;
738 } 1394 }
739 ldpaths[i] = NULL; 1395 ldpaths[i] = NULL;
740 1396
741 fclose(fp); 1397 fclose(fp);
1398 return i;
742} 1399}
1400
1401#elif defined(__FreeBSD__) || (__DragonFly__)
1402
1403static int load_ld_cache_config(int i, const char *fname)
1404{
1405 FILE *fp = NULL;
1406 char *b = NULL, *p;
1407 struct elfhints_hdr hdr;
1408
1409 if (i + 1 == ARRAY_SIZE(ldpaths))
1410 return i;
1411
1412 if ((fp = fopen(fname, "r")) == NULL)
1413 return i;
1414
1415 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1416 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1417 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1418 {
1419 fclose(fp);
1420 return i;
1421 }
1422
1423 b = (char*)malloc(hdr.dirlistlen+1);
1424 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1425 fclose(fp);
1426 free(b);
1427 return i;
1428 }
1429
1430 while ((p = strsep(&b, ":"))) {
1431 if (*p == '\0') continue;
1432 ldpaths[i++] = xstrdup(p);
1433
1434 if (i + 1 == ARRAY_SIZE(ldpaths))
1435 break;
1436 }
1437 ldpaths[i] = NULL;
1438
1439 free(b);
1440 fclose(fp);
1441 return i;
1442}
1443
1444#else
1445
1446#warning Cache config support not implemented for your target
1447static int load_ld_cache_config(int i, const char *fname)
1448{
1449 memset(ldpaths, 0x00, sizeof(ldpaths));
1450}
1451
1452#endif
743 1453
744/* scan /etc/ld.so.conf for paths */ 1454/* scan /etc/ld.so.conf for paths */
745static void scanelf_ldpath() 1455static void scanelf_ldpath()
746{ 1456{
747 char scan_l, scan_ul, scan_ull; 1457 char scan_l, scan_ul, scan_ull;
781 } 1491 }
782 1492
783 free(path); 1493 free(path);
784} 1494}
785 1495
786
787
788/* usage / invocation handling functions */ 1496/* usage / invocation handling functions */
789#define PARSE_FLAGS "plRmyxetrnibs:N:aqvF:f:o:BhV" 1497#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:BhV"
790#define a_argument required_argument 1498#define a_argument required_argument
791static struct option const long_opts[] = { 1499static struct option const long_opts[] = {
792 {"path", no_argument, NULL, 'p'}, 1500 {"path", no_argument, NULL, 'p'},
793 {"ldpath", no_argument, NULL, 'l'}, 1501 {"ldpath", no_argument, NULL, 'l'},
794 {"recursive", no_argument, NULL, 'R'}, 1502 {"recursive", no_argument, NULL, 'R'},
795 {"mount", no_argument, NULL, 'm'}, 1503 {"mount", no_argument, NULL, 'm'},
796 {"symlink", no_argument, NULL, 'y'}, 1504 {"symlink", no_argument, NULL, 'y'},
1505 {"archives", no_argument, NULL, 'A'},
1506 {"ldcache", no_argument, NULL, 'L'},
1507 {"fix", no_argument, NULL, 'X'},
1508 {"setpax", a_argument, NULL, 'z'},
797 {"pax", no_argument, NULL, 'x'}, 1509 {"pax", no_argument, NULL, 'x'},
798 {"header", no_argument, NULL, 'e'}, 1510 {"header", no_argument, NULL, 'e'},
799 {"textrel", no_argument, NULL, 't'}, 1511 {"textrel", no_argument, NULL, 't'},
800 {"rpath", no_argument, NULL, 'r'}, 1512 {"rpath", no_argument, NULL, 'r'},
801 {"needed", no_argument, NULL, 'n'}, 1513 {"needed", no_argument, NULL, 'n'},
802 {"interp", no_argument, NULL, 'i'}, 1514 {"interp", no_argument, NULL, 'i'},
803 {"bind", no_argument, NULL, 'b'}, 1515 {"bind", no_argument, NULL, 'b'},
1516 {"soname", no_argument, NULL, 'S'},
804 {"symbol", a_argument, NULL, 's'}, 1517 {"symbol", a_argument, NULL, 's'},
1518 {"section", a_argument, NULL, 'k'},
805 {"lib", a_argument, NULL, 'N'}, 1519 {"lib", a_argument, NULL, 'N'},
1520 {"gmatch", no_argument, NULL, 'g'},
1521 {"textrels", no_argument, NULL, 'T'},
1522 {"etype", a_argument, NULL, 'E'},
1523 {"bits", a_argument, NULL, 'M'},
806 {"all", no_argument, NULL, 'a'}, 1524 {"all", no_argument, NULL, 'a'},
807 {"quiet", no_argument, NULL, 'q'}, 1525 {"quiet", no_argument, NULL, 'q'},
808 {"verbose", no_argument, NULL, 'v'}, 1526 {"verbose", no_argument, NULL, 'v'},
809 {"format", a_argument, NULL, 'F'}, 1527 {"format", a_argument, NULL, 'F'},
810 {"from", a_argument, NULL, 'f'}, 1528 {"from", a_argument, NULL, 'f'},
811 {"file", a_argument, NULL, 'o'}, 1529 {"file", a_argument, NULL, 'o'},
812 {"nobanner", no_argument, NULL, 'B'}, 1530 {"nobanner", no_argument, NULL, 'B'},
813 {"help", no_argument, NULL, 'h'}, 1531 {"help", no_argument, NULL, 'h'},
814 {"version", no_argument, NULL, 'V'}, 1532 {"version", no_argument, NULL, 'V'},
815 {NULL, no_argument, NULL, 0x0} 1533 {NULL, no_argument, NULL, 0x0}
816}; 1534};
818static const char *opts_help[] = { 1536static const char *opts_help[] = {
819 "Scan all directories in PATH environment", 1537 "Scan all directories in PATH environment",
820 "Scan all directories in /etc/ld.so.conf", 1538 "Scan all directories in /etc/ld.so.conf",
821 "Scan directories recursively", 1539 "Scan directories recursively",
822 "Don't recursively cross mount points", 1540 "Don't recursively cross mount points",
823 "Don't scan symlinks\n", 1541 "Don't scan symlinks",
1542 "Scan archives (.a files)",
1543 "Utilize ld.so.cache information (use with -r/-n)",
1544 "Try and 'fix' bad things (use with -r/-e)",
1545 "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
824 "Print PaX markings", 1546 "Print PaX markings",
825 "Print GNU_STACK/PT_LOAD markings", 1547 "Print GNU_STACK/PT_LOAD markings",
826 "Print TEXTREL information", 1548 "Print TEXTREL information",
827 "Print RPATH information", 1549 "Print RPATH information",
828 "Print NEEDED information", 1550 "Print NEEDED information",
829 "Print INTERP information", 1551 "Print INTERP information",
830 "Print BIND information", 1552 "Print BIND information",
1553 "Print SONAME information",
831 "Find a specified symbol", 1554 "Find a specified symbol",
1555 "Find a specified section",
832 "Find a specified library", 1556 "Find a specified library",
1557 "Use strncmp to match libraries. (use with -N)",
1558 "Locate cause of TEXTREL",
1559 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1560 "Print only ELF files matching numeric bits",
833 "Print all scanned info (-x -e -t -r -n -i -b)\n", 1561 "Print all scanned info (-x -e -t -r -b)\n",
834 "Only output 'bad' things", 1562 "Only output 'bad' things",
835 "Be verbose (can be specified more than once)", 1563 "Be verbose (can be specified more than once)",
836 "Use specified format for output", 1564 "Use specified format for output",
837 "Read input stream from a filename", 1565 "Read input stream from a filename",
838 "Write output stream to a filename", 1566 "Write output stream to a filename",
845/* display usage and exit */ 1573/* display usage and exit */
846static void usage(int status) 1574static void usage(int status)
847{ 1575{
848 unsigned long i; 1576 unsigned long i;
849 printf("* Scan ELF binaries for stuff\n\n" 1577 printf("* Scan ELF binaries for stuff\n\n"
850 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 1578 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
851 printf("Options: -[%s]\n", PARSE_FLAGS); 1579 printf("Options: -[%s]\n", PARSE_FLAGS);
852 for (i = 0; long_opts[i].name; ++i) 1580 for (i = 0; long_opts[i].name; ++i)
853 if (long_opts[i].has_arg == no_argument) 1581 if (long_opts[i].has_arg == no_argument)
854 printf(" -%c, --%-13s* %s\n", long_opts[i].val, 1582 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
855 long_opts[i].name, opts_help[i]); 1583 long_opts[i].name, opts_help[i]);
856 else 1584 else
857 printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val, 1585 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
858 long_opts[i].name, opts_help[i]); 1586 long_opts[i].name, opts_help[i]);
859 1587
860 if (status != EXIT_SUCCESS) 1588 if (status != EXIT_SUCCESS)
861 exit(status); 1589 exit(status);
862 1590
863 puts("\nThe format modifiers for the -F option are:"); 1591 puts("\nThe format modifiers for the -F option are:");
864 puts(" F Filename \tx PaX Flags \te STACK/RELRO"); 1592 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
865 puts(" t TEXTREL \tr RPATH \tn NEEDED"); 1593 puts(" t TEXTREL \tr RPATH \tn NEEDED");
866 puts(" i INTERP \tb BIND \ts symbol"); 1594 puts(" i INTERP \tb BIND \ts symbol");
867 puts(" N library \to Type"); 1595 puts(" N library \to Type \tT TEXTRELs");
1596 puts(" S SONAME \tk section");
868 puts(" p filename (with search path removed)"); 1597 puts(" p filename (with search path removed)");
869 puts(" f base filename"); 1598 puts(" f filename (short name/basename)");
870 puts("Prefix each modifier with '%' (verbose) or '#' (silent)"); 1599 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
871 1600
1601 puts("\nELF Etypes:");
1602 print_etypes(stdout);
1603
872 exit(status); 1604 exit(status);
873} 1605}
874 1606
875/* parse command line arguments and preform needed actions */ 1607/* parse command line arguments and preform needed actions */
876static void parseargs(int argc, char *argv[]) 1608static int parseargs(int argc, char *argv[])
877{ 1609{
878 int i; 1610 int i;
879 char *from_file = NULL; 1611 const char *from_file = NULL;
1612 int ret = 0;
880 1613
881 opterr = 0; 1614 opterr = 0;
882 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 1615 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
883 switch (i) { 1616 switch (i) {
884 1617
885 case 'V': 1618 case 'V':
886 printf("%s compiled %s\n%s\n" 1619 printf("pax-utils-%s: %s compiled %s\n%s\n"
887 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 1620 "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
888 __FILE__, __DATE__, rcsid, argv0); 1621 VERSION, __FILE__, __DATE__, rcsid, argv0);
889 exit(EXIT_SUCCESS); 1622 exit(EXIT_SUCCESS);
890 break; 1623 break;
891 case 'h': usage(EXIT_SUCCESS); break; 1624 case 'h': usage(EXIT_SUCCESS); break;
892 case 'f': 1625 case 'f':
893 if (from_file) err("Don't specify -f twice"); 1626 if (from_file) warn("You prob don't want to specify -f twice");
894 from_file = xstrdup(optarg); 1627 from_file = optarg;
1628 break;
1629 case 'E':
1630 strncpy(match_etypes, optarg, sizeof(match_etypes));
1631 break;
1632 case 'M':
1633 match_bits = atoi(optarg);
895 break; 1634 break;
896 case 'o': { 1635 case 'o': {
897 FILE *fp = NULL;
898 if ((fp = freopen(optarg, "w", stdout)) == NULL) 1636 if (freopen(optarg, "w", stdout) == NULL)
899 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1637 err("Could not open output stream '%s': %s", optarg, strerror(errno));
900 SET_STDOUT(fp);
901 break; 1638 break;
902 } 1639 }
903 1640 case 'k':
1641 if (find_section) warn("You prob don't want to specify -k twice");
1642 find_section = optarg;
1643 break;
904 case 's': { 1644 case 's': {
905 size_t len;
906 if (find_sym) err("Don't specify -s twice"); 1645 if (find_sym) warn("You prob don't want to specify -s twice");
907 find_sym = xstrdup(optarg); 1646 find_sym = optarg;
908 len = strlen(find_sym) + 1;
909 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1)); 1647 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
910 sprintf(versioned_symname, "%s@", find_sym); 1648 sprintf(versioned_symname, "%s@", find_sym);
911 break; 1649 break;
912 } 1650 }
913 case 'N': { 1651 case 'N': {
914 if (find_lib) err("Don't specify -N twice"); 1652 if (find_lib) warn("You prob don't want to specify -N twice");
915 find_lib = xstrdup(optarg); 1653 find_lib = optarg;
916 break; 1654 break;
917 } 1655 }
918 1656
919 case 'F': { 1657 case 'F': {
920 if (out_format) err("Don't specify -F twice"); 1658 if (out_format) warn("You prob don't want to specify -F twice");
921 out_format = xstrdup(optarg); 1659 out_format = optarg;
1660 break;
1661 }
1662 case 'z': {
1663 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1664 size_t x;
1665
1666 for (x = 0 ; x < strlen(optarg); x++) {
1667 switch(optarg[x]) {
1668 case 'p':
1669 case 'P':
1670 do_state(optarg[x], PAGEEXEC);
922 break; 1671 break;
1672 case 's':
1673 case 'S':
1674 do_state(optarg[x], SEGMEXEC);
1675 break;
1676 case 'm':
1677 case 'M':
1678 do_state(optarg[x], MPROTECT);
1679 break;
1680 case 'e':
1681 case 'E':
1682 do_state(optarg[x], EMUTRAMP);
1683 break;
1684 case 'r':
1685 case 'R':
1686 do_state(optarg[x], RANDMMAP);
1687 break;
1688 case 'x':
1689 case 'X':
1690 do_state(optarg[x], RANDEXEC);
1691 break;
1692 default:
1693 break;
1694 }
923 } 1695 }
924 1696 if (!(((flags & PF_PAGEEXEC) && (flags & PF_NOPAGEEXEC)) ||
1697 ((flags & PF_SEGMEXEC) && (flags & PF_NOSEGMEXEC)) ||
1698 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)) ||
1699 ((flags & PF_RANDEXEC) && (flags & PF_NORANDEXEC)) ||
1700 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1701 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1702 setpax = flags;
1703 break;
1704 }
1705 case 'g': gmatch = 1; break;
1706 case 'L': use_ldcache = 1; break;
925 case 'y': scan_symlink = 0; break; 1707 case 'y': scan_symlink = 0; break;
1708 case 'A': scan_archives = 1; break;
926 case 'B': show_banner = 0; break; 1709 case 'B': show_banner = 0; break;
927 case 'l': scan_ldpath = 1; break; 1710 case 'l': scan_ldpath = 1; break;
928 case 'p': scan_envpath = 1; break; 1711 case 'p': scan_envpath = 1; break;
929 case 'R': dir_recurse = 1; break; 1712 case 'R': dir_recurse = 1; break;
930 case 'm': dir_crossmount = 0; break; 1713 case 'm': dir_crossmount = 0; break;
1714 case 'X': ++fix_elf; break;
931 case 'x': show_pax = 1; break; 1715 case 'x': show_pax = 1; break;
932 case 'e': show_phdr = 1; break; 1716 case 'e': show_phdr = 1; break;
933 case 't': show_textrel = 1; break; 1717 case 't': show_textrel = 1; break;
934 case 'r': show_rpath = 1; break; 1718 case 'r': show_rpath = 1; break;
935 case 'n': show_needed = 1; break; 1719 case 'n': show_needed = 1; break;
936 case 'i': show_interp = 1; break; 1720 case 'i': show_interp = 1; break;
937 case 'b': show_bind = 1; break; 1721 case 'b': show_bind = 1; break;
1722 case 'S': show_soname = 1; break;
1723 case 'T': show_textrels = 1; break;
938 case 'q': be_quiet = 1; break; 1724 case 'q': be_quiet = 1; break;
939 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1725 case 'v': be_verbose = (be_verbose % 20) + 1; break;
940 case 'a': show_pax = show_phdr = show_textrel = show_rpath = \ 1726 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break;
941 show_needed = show_interp = show_bind = 1; break;
942 1727
943 case ':': 1728 case ':':
944 err("Option missing parameter\n"); 1729 err("Option '%c' is missing parameter", optopt);
945 case '?': 1730 case '?':
946 err("Unknown option\n"); 1731 err("Unknown option '%c' or argument missing", optopt);
947 default: 1732 default:
948 err("Unhandled option '%c'", i); 1733 err("Unhandled option '%c'; please report this", i);
949 } 1734 }
950 } 1735 }
951 1736
952 /* let the format option override all other options */ 1737 /* let the format option override all other options */
953 if (out_format) { 1738 if (out_format) {
954 show_pax = show_phdr = show_textrel = show_rpath = \ 1739 show_pax = show_phdr = show_textrel = show_rpath = \
955 show_needed = show_interp = show_bind = 0; 1740 show_needed = show_interp = show_bind = show_soname = \
1741 show_textrels = 0;
956 for (i = 0; out_format[i]; ++i) { 1742 for (i = 0; out_format[i]; ++i) {
957 if (!IS_MODIFIER(out_format[i])) continue; 1743 if (!IS_MODIFIER(out_format[i])) continue;
958 1744
959 switch (out_format[++i]) { 1745 switch (out_format[++i]) {
1746 case '+': break;
960 case '%': break; 1747 case '%': break;
961 case '#': break; 1748 case '#': break;
962 case 'F': break; 1749 case 'F': break;
963 case 'p': break; 1750 case 'p': break;
964 case 'f': break; 1751 case 'f': break;
1752 case 'k': break;
965 case 's': break; 1753 case 's': break;
966 case 'N': break; 1754 case 'N': break;
967 case 'o': break; 1755 case 'o': break;
968 case 'x': show_pax = 1; break; 1756 case 'x': show_pax = 1; break;
969 case 'e': show_phdr = 1; break; 1757 case 'e': show_phdr = 1; break;
970 case 't': show_textrel = 1; break; 1758 case 't': show_textrel = 1; break;
971 case 'r': show_rpath = 1; break; 1759 case 'r': show_rpath = 1; break;
972 case 'n': show_needed = 1; break; 1760 case 'n': show_needed = 1; break;
973 case 'i': show_interp = 1; break; 1761 case 'i': show_interp = 1; break;
974 case 'b': show_bind = 1; break; 1762 case 'b': show_bind = 1; break;
1763 case 'S': show_soname = 1; break;
1764 case 'T': show_textrels = 1; break;
975 default: 1765 default:
976 err("Invalid format specifier '%c' (byte %i)", 1766 err("Invalid format specifier '%c' (byte %i)",
977 out_format[i], i+1); 1767 out_format[i], i+1);
978 } 1768 }
979 } 1769 }
980 1770
981 /* construct our default format */ 1771 /* construct our default format */
982 } else { 1772 } else {
983 size_t fmt_len = 30; 1773 size_t fmt_len = 30;
984 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 1774 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
985 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 1775 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
986 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 1776 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
987 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 1777 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
988 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 1778 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
989 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 1779 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
990 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 1780 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
991 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 1781 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
992 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len); 1782 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1783 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1784 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
993 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len); 1785 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1786 if (find_section) xstrcat(&out_format, "%k ", &fmt_len);
994 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len); 1787 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
995 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 1788 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
996 } 1789 }
997 if (be_verbose > 2) printf("Format: %s\n", out_format); 1790 if (be_verbose > 2) printf("Format: %s\n", out_format);
998 1791
999 /* now lets actually do the scanning */ 1792 /* now lets actually do the scanning */
1000 if (scan_ldpath || (show_rpath && be_quiet)) 1793 if (scan_ldpath || use_ldcache)
1001 load_ld_so_conf(); 1794 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1002 if (scan_ldpath) scanelf_ldpath(); 1795 if (scan_ldpath) scanelf_ldpath();
1003 if (scan_envpath) scanelf_envpath(); 1796 if (scan_envpath) scanelf_envpath();
1797 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1798 from_file = "-";
1004 if (from_file) { 1799 if (from_file) {
1005 scanelf_from_file(from_file); 1800 scanelf_from_file(from_file);
1006 free(from_file);
1007 from_file = *argv; 1801 from_file = *argv;
1008 } 1802 }
1009 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1803 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1010 err("Nothing to scan !?"); 1804 err("Nothing to scan !?");
1011 while (optind < argc) { 1805 while (optind < argc) {
1012 search_path = argv[optind++]; 1806 search_path = argv[optind++];
1013 scanelf_dir(search_path); 1807 ret = scanelf_dir(search_path);
1014 } 1808 }
1015 1809
1016 /* clean up */ 1810 /* clean up */
1017 if (find_sym) {
1018 free(find_sym);
1019 free(versioned_symname); 1811 free(versioned_symname);
1020 }
1021 if (find_lib) free(find_lib);
1022 if (out_format) free(out_format);
1023 for (i = 0; ldpaths[i]; ++i) 1812 for (i = 0; ldpaths[i]; ++i)
1024 free(ldpaths[i]); 1813 free(ldpaths[i]);
1814
1815 if (ldcache != 0)
1816 munmap(ldcache, ldcache_size);
1817 return ret;
1818}
1819
1820static char **get_split_env(const char *envvar)
1821{
1822 const char *delims = " \t\n";
1823 char **envvals = NULL;
1824 char *env, *s;
1825 int nentry;
1826
1827 if ((env = getenv(envvar)) == NULL)
1828 return NULL;
1829
1830 env = xstrdup(env);
1831 if (env == NULL)
1832 return NULL;
1833
1834 s = strtok(env, delims);
1835 if (s == NULL) {
1836 free(env);
1837 return NULL;
1838 }
1839
1840 nentry = 0;
1841 while (s != NULL) {
1842 ++nentry;
1843 envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
1844 envvals[nentry-1] = s;
1845 s = strtok(NULL, delims);
1846 }
1847 envvals[nentry] = NULL;
1848
1849 /* don't want to free(env) as it contains the memory that backs
1850 * the envvals array of strings */
1851 return envvals;
1852}
1853static void parseenv()
1854{
1855 qa_textrels = get_split_env("QA_TEXTRELS");
1856 qa_execstack = get_split_env("QA_EXECSTACK");
1857 qa_wx_load = get_split_env("QA_WX_LOAD");
1858}
1859
1860#ifdef __PAX_UTILS_CLEANUP
1861static void cleanup()
1862{
1863 free(out_format);
1864 free(qa_textrels);
1865 free(qa_execstack);
1866 free(qa_wx_load);
1867}
1868#endif
1869
1870
1871int main(int argc, char *argv[])
1872{
1873 int ret;
1874 if (argc < 2)
1875 usage(EXIT_FAILURE);
1876 parseenv();
1877 ret = parseargs(argc, argv);
1878 fclose(stdout);
1879#ifdef __PAX_UTILS_CLEANUP
1880 cleanup();
1881 warn("The calls to add/delete heap should be off:\n"
1882 "\t- 1 due to the out_buffer not being freed in scanelf_file()\n"
1883 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1884#endif
1885 return ret;
1025} 1886}
1026 1887
1027 1888
1028 1889
1029/* utility funcs */ 1890/* utility funcs */
1031{ 1892{
1032 char *ret = strdup(s); 1893 char *ret = strdup(s);
1033 if (!ret) err("Could not strdup(): %s", strerror(errno)); 1894 if (!ret) err("Could not strdup(): %s", strerror(errno));
1034 return ret; 1895 return ret;
1035} 1896}
1036
1037static void *xmalloc(size_t size) 1897static void *xmalloc(size_t size)
1038{ 1898{
1039 void *ret = malloc(size); 1899 void *ret = malloc(size);
1040 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size); 1900 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1041 return ret; 1901 return ret;
1042} 1902}
1043 1903static void *xrealloc(void *ptr, size_t size)
1904{
1905 void *ret = realloc(ptr, size);
1906 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
1907 return ret;
1908}
1044static void xstrcat(char **dst, const char *src, size_t *curr_len) 1909static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1045{ 1910{
1046 size_t new_len; 1911 size_t new_len;
1047 1912
1048 new_len = strlen(*dst) + strlen(src); 1913 new_len = strlen(*dst) + strlen(src);
1049 if (*curr_len <= new_len) { 1914 if (*curr_len <= new_len) {
1050 *curr_len = new_len + (*curr_len / 2); 1915 *curr_len = new_len + (*curr_len / 2);
1051 *dst = realloc(*dst, *curr_len); 1916 *dst = realloc(*dst, *curr_len);
1052 if (!*dst) 1917 if (!*dst)
1053 err("could not realloc %li bytes", (unsigned long)*curr_len); 1918 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1054 } 1919 }
1055 1920
1921 if (n)
1922 strncat(*dst, src, n);
1923 else
1056 strcat(*dst, src); 1924 strcat(*dst, src);
1057} 1925}
1058
1059static inline void xchrcat(char **dst, const char append, size_t *curr_len) 1926static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1060{ 1927{
1061 static char my_app[2]; 1928 static char my_app[2];
1062 my_app[0] = append; 1929 my_app[0] = append;
1063 my_app[1] = '\0'; 1930 my_app[1] = '\0';
1064 xstrcat(dst, my_app, curr_len); 1931 xstrcat(dst, my_app, curr_len);
1065} 1932}
1066 1933
1067 1934/* Match filename against entries in matchlist, return TRUE
1068 1935 * if the file is listed */
1069int main(int argc, char *argv[]) 1936static int file_matches_list(const char *filename, char **matchlist)
1070{ 1937{
1071 if (argc < 2) 1938 char **file;
1072 usage(EXIT_FAILURE); 1939 char *match;
1073 parseargs(argc, argv); 1940 char buf[__PAX_UTILS_PATH_MAX];
1074 fclose(stdout); 1941
1075#ifdef __BOUNDS_CHECKING_ON 1942 if (matchlist == NULL)
1076 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()"); 1943 return 0;
1077#endif 1944
1078 return EXIT_SUCCESS; 1945 for (file = matchlist; *file != NULL; file++) {
1946 if (search_path) {
1947 snprintf(buf, sizeof(buf), "%s%s", search_path, *file);
1948 match = buf;
1949 } else {
1950 match = *file;
1951 }
1952 if (fnmatch(match, filename, 0) == 0)
1953 return 1;
1954 }
1955 return 0;
1079} 1956}

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