/[gentoo-projects]/pax-utils/scanelf.c
Gentoo

Diff of /pax-utils/scanelf.c

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 1.185 Revision 1.249
1/* 1/*
2 * Copyright 2003-2007 Gentoo Foundation 2 * Copyright 2003-2012 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 1.185 2007/08/18 04:59:32 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.249 2012/11/04 08:23:12 vapier Exp $
5 * 5 *
6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2012 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2012 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10static const char rcsid[] = "$Id: scanelf.c,v 1.249 2012/11/04 08:23:12 vapier Exp $";
11const char argv0[] = "scanelf";
12
10#include "paxinc.h" 13#include "paxinc.h"
11
12static const char *rcsid = "$Id: scanelf.c,v 1.185 2007/08/18 04:59:32 vapier Exp $";
13#define argv0 "scanelf"
14 14
15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
16 16
17/* prototypes */ 17/* prototypes */
18static int file_matches_list(const char *filename, char **matchlist); 18static int file_matches_list(const char *filename, char **matchlist);
19static int scanelf_elfobj(elfobj *elf);
20static int scanelf_elf(const char *filename, int fd, size_t len);
21static int scanelf_archive(const char *filename, int fd, size_t len);
22static int scanelf_file(const char *filename, const struct stat *st_cache);
23static int scanelf_dir(const char *path);
24static void scanelf_ldpath(void);
25static void scanelf_envpath(void);
26static void usage(int status);
27static char **get_split_env(const char *envvar);
28static void parseenv(void);
29static int parseargs(int argc, char *argv[]);
30static char *xstrdup(const char *s);
31static void *xmalloc(size_t size);
32static void *xrealloc(void *ptr, size_t size);
33static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
34#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
35static inline void xchrcat(char **dst, const char append, size_t *curr_len);
36static int rematch(const char *regex, const char *match, int cflags);
37 19
38/* variables to control behavior */ 20/* variables to control behavior */
39static char match_etypes[126] = ""; 21static char *match_etypes = NULL;
40static char *ldpaths[256]; 22static array_t _ldpaths = array_init_decl, *ldpaths = &_ldpaths;
41static char scan_ldpath = 0; 23static char scan_ldpath = 0;
42static char scan_envpath = 0; 24static char scan_envpath = 0;
43static char scan_symlink = 1; 25static char scan_symlink = 1;
44static char scan_archives = 0; 26static char scan_archives = 0;
45static char dir_recurse = 0; 27static char dir_recurse = 0;
46static char dir_crossmount = 1; 28static char dir_crossmount = 1;
47static char show_pax = 0; 29static char show_pax = 0;
48static char show_perms = 0; 30static char show_perms = 0;
31static char show_size = 0;
49static char show_phdr = 0; 32static char show_phdr = 0;
50static char show_textrel = 0; 33static char show_textrel = 0;
51static char show_rpath = 0; 34static char show_rpath = 0;
52static char show_needed = 0; 35static char show_needed = 0;
53static char show_interp = 0; 36static char show_interp = 0;
54static char show_bind = 0; 37static char show_bind = 0;
55static char show_soname = 0; 38static char show_soname = 0;
56static char show_textrels = 0; 39static char show_textrels = 0;
57static char show_banner = 1; 40static char show_banner = 1;
58static char show_endian = 0; 41static char show_endian = 0;
42static char show_osabi = 0;
43static char show_eabi = 0;
59static char be_quiet = 0; 44static char be_quiet = 0;
60static char be_verbose = 0; 45static char be_verbose = 0;
61static char be_wewy_wewy_quiet = 0; 46static char be_wewy_wewy_quiet = 0;
62static char be_semi_verbose = 0; 47static char be_semi_verbose = 0;
63static char *find_sym = NULL, *versioned_symname = NULL; 48static char *find_sym = NULL;
49static array_t _find_sym_arr = array_init_decl, *find_sym_arr = &_find_sym_arr;
50static array_t _find_sym_regex_arr = array_init_decl, *find_sym_regex_arr = &_find_sym_regex_arr;
64static char *find_lib = NULL; 51static char *find_lib = NULL;
52static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
65static char *find_section = NULL; 53static char *find_section = NULL;
54static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
66static char *out_format = NULL; 55static char *out_format = NULL;
67static char *search_path = NULL; 56static char *search_path = NULL;
68static char fix_elf = 0; 57static char fix_elf = 0;
69static char g_match = 0; 58static char g_match = 0;
70static char use_ldcache = 0; 59static char use_ldcache = 0;
60static char use_ldpath = 0;
71 61
72static char **qa_textrels = NULL; 62static char **qa_textrels = NULL;
73static char **qa_execstack = NULL; 63static char **qa_execstack = NULL;
74static char **qa_wx_load = NULL; 64static char **qa_wx_load = NULL;
65static int root_fd = AT_FDCWD;
75 66
76int match_bits = 0; 67static int match_bits = 0;
77unsigned int match_perms = 0; 68static unsigned int match_perms = 0;
78caddr_t ldcache = 0; 69static void *ldcache = NULL;
79size_t ldcache_size = 0; 70static size_t ldcache_size = 0;
80unsigned long setpax = 0UL; 71static unsigned long setpax = 0UL;
81 72
82int has_objdump = 0; 73static int has_objdump = 0;
83
84static char *getstr_perms(const char *fname);
85static char *getstr_perms(const char *fname) {
86 struct stat st;
87 static char buf[8];
88
89 if ((stat(fname, &st)) == (-1))
90 return (char *) "";
91
92 snprintf(buf, sizeof(buf), "%o", st.st_mode);
93
94 return (char *) buf + 2;
95}
96 74
97/* find the path to a file by name */ 75/* find the path to a file by name */
98static char *which(const char *fname) 76static int bin_in_path(const char *fname)
99{ 77{
100 static char fullpath[BUFSIZ]; 78 char fullpath[__PAX_UTILS_PATH_MAX];
101 char *path, *p; 79 char *path, *p;
102 80
103 path = getenv("PATH"); 81 path = getenv("PATH");
104 if (!path) 82 if (!path)
105 return NULL; 83 return 0;
106 84
107 path = xstrdup(path);
108 while ((p = strrchr(path, ':')) != NULL) { 85 while ((p = strrchr(path, ':')) != NULL) {
109 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname); 86 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
110 *p = 0; 87 *p = 0;
111 if (access(fullpath, R_OK) != (-1)) { 88 if (access(fullpath, R_OK) != -1)
112 free(path); 89 return 1;
113 return (char *) fullpath;
114 } 90 }
115 } 91
116 free(path); 92 return 0;
93}
94
95static FILE *fopenat_r(int dir_fd, const char *path)
96{
97 int fd = openat(dir_fd, path, O_RDONLY|O_CLOEXEC);
98 if (fd == -1)
117 return NULL; 99 return NULL;
100 return fdopen(fd, "re");
118} 101}
119 102
120/* 1 on failure. 0 otherwise */ 103static const char *root_rel_path(const char *path)
121static int rematch(const char *regex, const char *match, int cflags)
122{ 104{
123 regex_t preg; 105 /*
124 int ret; 106 * openat() will ignore the dirfd if path starts with
125 107 * a /, so consume all of that noise
126 if ((match == NULL) || (regex == NULL)) 108 *
127 return EXIT_FAILURE; 109 * XXX: we don't handle relative paths like ../ that
128 110 * break out of the --root option, but for now, just
129 111 * don't do that :P.
130 if ((ret = regcomp(&preg, regex, cflags))) { 112 */
131 char err[256]; 113 if (root_fd != AT_FDCWD) {
132 114 while (*path == '/')
133 if (regerror(ret, &preg, err, sizeof(err))) 115 ++path;
134 fprintf(stderr, "regcomp failed: %s", err); 116 if (*path == '\0')
135 else 117 path = ".";
136 fprintf(stderr, "regcomp failed");
137
138 return EXIT_FAILURE;
139 } 118 }
140 ret = regexec(&preg, match, 0, NULL, 0);
141 regfree(&preg);
142 119
143 return ret; 120 return path;
144} 121}
145 122
146/* sub-funcs for scanelf_file() */ 123/* sub-funcs for scanelf_fileat() */
147static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 124static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **str)
148{ 125{
149 /* find the best SHT_DYNSYM and SHT_STRTAB sections */ 126 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
127
128 /* debug sections */
129 void *symtab = elf_findsecbyname(elf, ".symtab");
130 void *strtab = elf_findsecbyname(elf, ".strtab");
131 /* runtime sections */
132 void *dynsym = elf_findsecbyname(elf, ".dynsym");
133 void *dynstr = elf_findsecbyname(elf, ".dynstr");
134
135 /*
136 * If the sections are marked NOBITS, then they don't exist, so we just
137 * skip them. This let's us work sanely with splitdebug ELFs (rather
138 * than spewing a lot of "corrupt ELF" messages later on). In malformed
139 * ELFs, the section might be wrongly set to NOBITS, but screw em.
140 */
150#define GET_SYMTABS(B) \ 141#define GET_SYMTABS(B) \
151 if (elf->elf_class == ELFCLASS ## B) { \ 142 if (elf->elf_class == ELFCLASS ## B) { \
152 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \ 143 Elf ## B ## _Shdr *esymtab = symtab; \
153 /* debug sections */ \ 144 Elf ## B ## _Shdr *estrtab = strtab; \
154 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \ 145 Elf ## B ## _Shdr *edynsym = dynsym; \
155 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \ 146 Elf ## B ## _Shdr *edynstr = dynstr; \
156 /* runtime sections */ \ 147 \
157 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \ 148 if (symtab && EGET(esymtab->sh_type) == SHT_NOBITS) \
158 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \ 149 symtab = NULL; \
150 if (dynsym && EGET(edynsym->sh_type) == SHT_NOBITS) \
151 dynsym = NULL; \
159 if (symtab && dynsym) { \ 152 if (symtab && dynsym) \
160 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 153 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
161 } else { \ 154 else \
162 *sym = (void*)(symtab ? symtab : dynsym); \ 155 *sym = symtab ? symtab : dynsym; \
163 } \ 156 \
157 if (strtab && EGET(estrtab->sh_type) == SHT_NOBITS) \
158 strtab = NULL; \
159 if (dynstr && EGET(edynstr->sh_type) == SHT_NOBITS) \
160 dynstr = NULL; \
164 if (strtab && dynstr) { \ 161 if (strtab && dynstr) \
165 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 162 *str = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
166 } else { \ 163 else \
167 *tab = (void*)(strtab ? strtab : dynstr); \ 164 *str = strtab ? strtab : dynstr; \
168 } \
169 } 165 }
170 GET_SYMTABS(32) 166 GET_SYMTABS(32)
171 GET_SYMTABS(64) 167 GET_SYMTABS(64)
168
169 if (*sym && *str)
170 return;
171
172 /*
173 * damn, they're really going to make us work for it huh?
174 * reconstruct the section header info out of the dynamic
175 * tags so we can see what symbols this guy uses at runtime.
176 */
177#define GET_SYMTABS_DT(B) \
178 if (elf->elf_class == ELFCLASS ## B) { \
179 size_t i; \
180 static Elf ## B ## _Shdr sym_shdr, str_shdr; \
181 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
182 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
183 Elf ## B ## _Addr vsym, vstr, vhash, vgnu_hash; \
184 Elf ## B ## _Dyn *dyn; \
185 Elf ## B ## _Off offset; \
186 \
187 /* lookup symbols used at runtime with DT_SYMTAB / DT_STRTAB */ \
188 vsym = vstr = vhash = vgnu_hash = 0; \
189 memset(&sym_shdr, 0, sizeof(sym_shdr)); \
190 memset(&str_shdr, 0, sizeof(str_shdr)); \
191 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
192 if (EGET(phdr[i].p_type) != PT_DYNAMIC) \
193 continue; \
194 \
195 offset = EGET(phdr[i].p_offset); \
196 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) \
197 continue; \
198 \
199 dyn = DYN ## B (elf->vdata + offset); \
200 while (EGET(dyn->d_tag) != DT_NULL) { \
201 switch (EGET(dyn->d_tag)) { \
202 case DT_SYMTAB: vsym = EGET(dyn->d_un.d_val); break; \
203 case DT_SYMENT: sym_shdr.sh_entsize = dyn->d_un.d_val; break; \
204 case DT_STRTAB: vstr = EGET(dyn->d_un.d_val); break; \
205 case DT_STRSZ: str_shdr.sh_size = dyn->d_un.d_val; break; \
206 case DT_HASH: vhash = EGET(dyn->d_un.d_val); break; \
207 /*case DT_GNU_HASH: vgnu_hash = EGET(dyn->d_un.d_val); break;*/ \
208 } \
209 ++dyn; \
210 } \
211 if (vsym && vstr) \
212 break; \
213 } \
214 if (!vsym || !vstr || !(vhash || vgnu_hash)) \
215 return; \
216 \
217 /* calc offset into the ELF by finding the load addr of the syms */ \
218 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
219 Elf ## B ## _Addr vaddr = EGET(phdr[i].p_vaddr); \
220 Elf ## B ## _Addr filesz = EGET(phdr[i].p_filesz); \
221 offset = EGET(phdr[i].p_offset); \
222 \
223 if (EGET(phdr[i].p_type) != PT_LOAD) \
224 continue; \
225 \
226 if (vhash >= vaddr && vhash < vaddr + filesz) { \
227 /* Scan the hash table to see how many entries we have */ \
228 Elf32_Word max_sym_idx = 0; \
229 Elf32_Word *hashtbl = elf->vdata + offset + (vhash - vaddr); \
230 Elf32_Word b, nbuckets = EGET(hashtbl[0]); \
231 Elf32_Word nchains = EGET(hashtbl[1]); \
232 Elf32_Word *buckets = &hashtbl[2]; \
233 Elf32_Word *chains = &buckets[nbuckets]; \
234 Elf32_Word sym_idx; \
235 \
236 for (b = 0; b < nbuckets; ++b) { \
237 if (!buckets[b]) \
238 continue; \
239 for (sym_idx = buckets[b]; sym_idx < nchains && sym_idx; sym_idx = chains[sym_idx]) \
240 if (max_sym_idx < sym_idx) \
241 max_sym_idx = sym_idx; \
242 } \
243 ESET(sym_shdr.sh_size, sym_shdr.sh_entsize * max_sym_idx); \
244 } \
245 \
246 if (vsym >= vaddr && vsym < vaddr + filesz) { \
247 ESET(sym_shdr.sh_offset, offset + (vsym - vaddr)); \
248 *sym = &sym_shdr; \
249 } \
250 \
251 if (vstr >= vaddr && vstr < vaddr + filesz) { \
252 ESET(str_shdr.sh_offset, offset + (vstr - vaddr)); \
253 *str = &str_shdr; \
254 } \
255 } \
256 }
257 GET_SYMTABS_DT(32)
258 GET_SYMTABS_DT(64)
172} 259}
173 260
174static char *scanelf_file_pax(elfobj *elf, char *found_pax) 261static char *scanelf_file_pax(elfobj *elf, char *found_pax)
175{ 262{
176 static char ret[7]; 263 static char ret[7];
203 } 290 }
204 SHOW_PAX(32) 291 SHOW_PAX(32)
205 SHOW_PAX(64) 292 SHOW_PAX(64)
206 } 293 }
207 294
208 295 /* Note: We do not support setting EI_PAX if not PT_PAX_FLAGS
209 if (fix_elf && setpax) { 296 * was found. This is known to break ELFs on glibc systems,
210 /* set the chpax settings */ 297 * and mainline PaX has deprecated use of this for a long time.
211 if (elf->elf_class == ELFCLASS32) { 298 * We could support changing PT_GNU_STACK, but that doesn't
212 if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC) 299 * seem like it's worth the effort. #411919
213 ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax)); 300 */
214 } else {
215 if (EHDR64(elf->ehdr)->e_type == ET_DYN || EHDR64(elf->ehdr)->e_type == ET_EXEC)
216 ESET(EHDR64(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
217 }
218 }
219 301
220 /* fall back to EI_PAX if no PT_PAX was found */ 302 /* fall back to EI_PAX if no PT_PAX was found */
221 if (!*ret) { 303 if (!*ret) {
222 static char *paxflags; 304 static char *paxflags;
223 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); 305 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
271 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 353 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
272 found = found_relro; \ 354 found = found_relro; \
273 offset = 4; \ 355 offset = 4; \
274 check_flags = PF_X; \ 356 check_flags = PF_X; \
275 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 357 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
276 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \ 358 if (EGET(ehdr->e_type) == ET_DYN || EGET(ehdr->e_type) == ET_EXEC) \
277 if (multi_load++ > max_pt_load) \ 359 if (multi_load++ > max_pt_load) \
278 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \ 360 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
279 if (file_matches_list(elf->filename, qa_wx_load)) \ 361 if (file_matches_list(elf->filename, qa_wx_load)) \
280 continue; \ 362 continue; \
281 found = found_load; \ 363 found = found_load; \
298 } else if (elf->shdr != NULL) { \ 380 } else if (elf->shdr != NULL) { \
299 /* no program headers which means this is prob an object file */ \ 381 /* no program headers which means this is prob an object file */ \
300 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 382 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
301 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 383 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
302 char *str; \ 384 char *str; \
303 if ((void*)strtbl > (void*)elf->data_end) \ 385 if ((void*)strtbl > elf->data_end) \
304 goto skip_this_shdr##B; \ 386 goto skip_this_shdr##B; \
305 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 387 check_flags = SHF_WRITE|SHF_EXECINSTR; \
306 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 388 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
307 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 389 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
308 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 390 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
339 return NULL; 421 return NULL;
340 else 422 else
341 return ret; 423 return ret;
342} 424}
343 425
426/*
427 * See if this ELF contains a DT_TEXTREL tag in any of its
428 * PT_DYNAMIC sections.
429 */
344static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 430static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
345{ 431{
346 static const char *ret = "TEXTREL"; 432 static const char *ret = "TEXTREL";
347 unsigned long i; 433 unsigned long i;
348 434
359 Elf ## B ## _Off offset; \ 445 Elf ## B ## _Off offset; \
360 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 446 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
361 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 447 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
362 offset = EGET(phdr[i].p_offset); \ 448 offset = EGET(phdr[i].p_offset); \
363 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 449 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
364 dyn = DYN ## B (elf->data + offset); \ 450 dyn = DYN ## B (elf->vdata + offset); \
365 while (EGET(dyn->d_tag) != DT_NULL) { \ 451 while (EGET(dyn->d_tag) != DT_NULL) { \
366 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 452 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
367 *found_textrel = 1; \ 453 *found_textrel = 1; \
368 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 454 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
369 return (be_wewy_wewy_quiet ? NULL : ret); \ 455 return (be_wewy_wewy_quiet ? NULL : ret); \
379 return NULL; 465 return NULL;
380 else 466 else
381 return " - "; 467 return " - ";
382} 468}
383 469
470/*
471 * Scan the .text section to see if there are any relocations in it.
472 * Should rewrite this to check PT_LOAD sections that are marked
473 * Executable rather than the section named '.text'.
474 */
384static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) 475static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
385{ 476{
386 unsigned long s, r, rmax; 477 unsigned long s, r, rmax;
387 void *symtab_void, *strtab_void, *text_void; 478 void *symtab_void, *strtab_void, *text_void;
388 479
409 Elf ## B ## _Rela *rela; \ 500 Elf ## B ## _Rela *rela; \
410 /* search the section headers for relocations */ \ 501 /* search the section headers for relocations */ \
411 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 502 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
412 uint32_t sh_type = EGET(shdr[s].sh_type); \ 503 uint32_t sh_type = EGET(shdr[s].sh_type); \
413 if (sh_type == SHT_REL) { \ 504 if (sh_type == SHT_REL) { \
414 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 505 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
415 rela = NULL; \ 506 rela = NULL; \
416 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 507 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
417 } else if (sh_type == SHT_RELA) { \ 508 } else if (sh_type == SHT_RELA) { \
418 rel = NULL; \ 509 rel = NULL; \
419 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 510 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
420 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 511 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
421 } else \ 512 } else \
422 continue; \ 513 continue; \
423 /* now see if any of the relocs are in the .text */ \ 514 /* now see if any of the relocs are in the .text */ \
424 for (r = 0; r < rmax; ++r) { \ 515 for (r = 0; r < rmax; ++r) { \
439 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 530 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
440 if (be_verbose <= 2) continue; \ 531 if (be_verbose <= 2) continue; \
441 } else \ 532 } else \
442 *found_textrels = 1; \ 533 *found_textrels = 1; \
443 /* locate this relocation symbol name */ \ 534 /* locate this relocation symbol name */ \
444 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 535 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
445 if ((void*)sym > (void*)elf->data_end) { \ 536 if ((void*)sym > elf->data_end) { \
446 warn("%s: corrupt ELF symbol", elf->filename); \ 537 warn("%s: corrupt ELF symbol", elf->filename); \
447 continue; \ 538 continue; \
448 } \ 539 } \
449 sym_max = ELF ## B ## _R_SYM(r_info); \ 540 sym_max = ELF ## B ## _R_SYM(r_info); \
450 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 541 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
453 sym = NULL; \ 544 sym = NULL; \
454 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 545 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
455 /* show the raw details about this reloc */ \ 546 /* show the raw details about this reloc */ \
456 printf(" %s: ", elf->base_filename); \ 547 printf(" %s: ", elf->base_filename); \
457 if (sym && sym->st_name) \ 548 if (sym && sym->st_name) \
458 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \ 549 printf("%s", elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
459 else \ 550 else \
460 printf("(memory/data?)"); \ 551 printf("(memory/data?)"); \
461 printf(" [0x%lX]", (unsigned long)r_offset); \ 552 printf(" [0x%lX]", (unsigned long)r_offset); \
462 /* now try to find the closest symbol that this rel is probably in */ \ 553 /* now try to find the closest symbol that this rel is probably in */ \
463 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 554 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
464 func = NULL; \ 555 func = NULL; \
465 offset_tmp = 0; \ 556 offset_tmp = 0; \
466 while (sym_max--) { \ 557 while (sym_max--) { \
467 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \ 558 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
468 func = sym; \ 559 func = sym; \
479 printf("%s", func_name); \ 570 printf("%s", func_name); \
480 } else \ 571 } else \
481 printf("(optimized out)"); \ 572 printf("(optimized out)"); \
482 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 573 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
483 if (be_verbose && has_objdump) { \ 574 if (be_verbose && has_objdump) { \
575 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
484 char *sysbuf; \ 576 char *sysbuf; \
485 size_t syslen; \ 577 size_t syslen; \
486 const char sysfmt[] = "objdump -r -R -d -w -l --start-address=0x%lX --stop-address=0x%lX %s | grep --color -i -C 3 '.*[[:space:]]%lX:[[:space:]]*R_.*'\n"; \ 578 const char sysfmt[] = "objdump -r -R -d -w -l --start-address=0x%lX --stop-address=0x%lX %s | grep --color -i -C 3 '.*[[:space:]]%lX:[[:space:]]*R_.*'\n"; \
487 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \ 579 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
488 sysbuf = xmalloc(syslen); \ 580 sysbuf = xmalloc(syslen); \
489 if (sysbuf) { \
490 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
491 if (end_addr < r_offset) \ 581 if (end_addr < r_offset) \
492 /* not uncommon when things are optimized out */ \ 582 /* not uncommon when things are optimized out */ \
493 end_addr = r_offset + 0x100; \ 583 end_addr = r_offset + 0x100; \
494 snprintf(sysbuf, syslen, sysfmt, \ 584 snprintf(sysbuf, syslen, sysfmt, \
495 (unsigned long)offset_tmp, \ 585 (unsigned long)offset_tmp, \
496 (unsigned long)end_addr, \ 586 (unsigned long)end_addr, \
497 elf->filename, \ 587 elf->filename, \
498 (unsigned long)r_offset); \ 588 (unsigned long)r_offset); \
499 fflush(stdout); \ 589 fflush(stdout); \
500 system(sysbuf); \ 590 if (system(sysbuf)) /* don't care */; \
501 fflush(stdout); \ 591 fflush(stdout); \
502 free(sysbuf); \ 592 free(sysbuf); \
503 } \
504 } \ 593 } \
505 } \ 594 } \
506 } } 595 } }
507 SHOW_TEXTRELS(32) 596 SHOW_TEXTRELS(32)
508 SHOW_TEXTRELS(64) 597 SHOW_TEXTRELS(64)
511 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename); 600 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
512 601
513 return NULL; 602 return NULL;
514} 603}
515 604
516static void rpath_security_checks(elfobj *, char *, const char *);
517static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type) 605static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
518{ 606{
519 struct stat st; 607 struct stat st;
520 switch (*item) { 608 switch (*item) {
521 case '/': break; 609 case '/': break;
537 break; 625 break;
538 } 626 }
539} 627}
540static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) 628static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
541{ 629{
542 unsigned long i, s; 630 unsigned long i;
543 char *rpath, *runpath, **r; 631 char *rpath, *runpath, **r;
544 void *strtbl_void; 632 void *strtbl_void;
545 633
546 if (!show_rpath) return; 634 if (!show_rpath) return;
547 635
562 /* Just scan dynamic headers */ \ 650 /* Just scan dynamic headers */ \
563 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 651 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
564 offset = EGET(phdr[i].p_offset); \ 652 offset = EGET(phdr[i].p_offset); \
565 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 653 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
566 /* Just scan dynamic RPATH/RUNPATH headers */ \ 654 /* Just scan dynamic RPATH/RUNPATH headers */ \
567 dyn = DYN ## B (elf->data + offset); \ 655 dyn = DYN ## B (elf->vdata + offset); \
568 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 656 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
569 if (word == DT_RPATH) { \ 657 if (word == DT_RPATH) { \
570 r = &rpath; \ 658 r = &rpath; \
571 } else if (word == DT_RUNPATH) { \ 659 } else if (word == DT_RUNPATH) { \
572 r = &runpath; \ 660 r = &runpath; \
576 } \ 664 } \
577 /* Verify the memory is somewhat sane */ \ 665 /* Verify the memory is somewhat sane */ \
578 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 666 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
579 if (offset < (Elf ## B ## _Off)elf->len) { \ 667 if (offset < (Elf ## B ## _Off)elf->len) { \
580 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 668 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
581 *r = (char*)(elf->data + offset); \ 669 *r = elf->data + offset; \
582 /* cache the length in case we need to nuke this section later on */ \ 670 /* cache the length in case we need to nuke this section later on */ \
583 if (fix_elf) \ 671 if (fix_elf) \
584 offset = strlen(*r); \ 672 offset = strlen(*r); \
585 /* If quiet, don't output paths in ld.so.conf */ \ 673 /* If quiet, don't output paths in ld.so.conf */ \
586 if (be_quiet) { \ 674 if (be_quiet) { \
592 /* scan each path in : delimited list */ \ 680 /* scan each path in : delimited list */ \
593 while (start) { \ 681 while (start) { \
594 rpath_security_checks(elf, start, get_elfdtype(word)); \ 682 rpath_security_checks(elf, start, get_elfdtype(word)); \
595 end = strchr(start, ':'); \ 683 end = strchr(start, ':'); \
596 len = (end ? abs(end - start) : strlen(start)); \ 684 len = (end ? abs(end - start) : strlen(start)); \
597 if (use_ldcache) \ 685 if (use_ldcache) { \
598 for (s = 0; ldpaths[s]; ++s) \ 686 size_t n; \
687 const char *ldpath; \
688 array_for_each(ldpaths, n, ldpath) \
599 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 689 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
600 *r = end; \ 690 *r = end; \
601 /* corner case ... if RPATH reads "/usr/lib:", we want \ 691 /* corner case ... if RPATH reads "/usr/lib:", we want \
602 * to show ':' rather than '' */ \ 692 * to show ':' rather than '' */ \
603 if (end && end[1] != '\0') \ 693 if (end && end[1] != '\0') \
604 (*r)++; \ 694 (*r)++; \
605 break; \ 695 break; \
606 } \ 696 } \
697 } \
607 if (!*r || !end) \ 698 if (!*r || !end) \
608 break; \ 699 break; \
609 else \ 700 else \
610 start = start + len + 1; \ 701 start = start + len + 1; \
611 } \ 702 } \
696#define FLAG_S390_LIB64 0x0400 787#define FLAG_S390_LIB64 0x0400
697#define FLAG_POWERPC_LIB64 0x0500 788#define FLAG_POWERPC_LIB64 0x0500
698#define FLAG_MIPS64_LIBN32 0x0600 789#define FLAG_MIPS64_LIBN32 0x0600
699#define FLAG_MIPS64_LIBN64 0x0700 790#define FLAG_MIPS64_LIBN64 0x0700
700 791
701static char *lookup_cache_lib(elfobj *, char *);
702
703#if defined(__GLIBC__) || defined(__UCLIBC__) 792#if defined(__GLIBC__) || defined(__UCLIBC__)
704 793
705static char *lookup_cache_lib(elfobj *elf, char *fname) 794static char *lookup_cache_lib(elfobj *elf, const char *fname)
706{ 795{
707 int fd = 0; 796 int fd;
708 char *strs; 797 char *strs;
709 static char buf[__PAX_UTILS_PATH_MAX] = ""; 798 static char buf[__PAX_UTILS_PATH_MAX] = "";
710 const char *cachefile = "/etc/ld.so.cache"; 799 const char *cachefile = root_rel_path("/etc/ld.so.cache");
711 struct stat st; 800 struct stat st;
712 801
713 typedef struct { 802 typedef struct {
714 char magic[LDSO_CACHE_MAGIC_LEN]; 803 char magic[LDSO_CACHE_MAGIC_LEN];
715 char version[LDSO_CACHE_VER_LEN]; 804 char version[LDSO_CACHE_VER_LEN];
725 libentry_t *libent; 814 libentry_t *libent;
726 815
727 if (fname == NULL) 816 if (fname == NULL)
728 return NULL; 817 return NULL;
729 818
730 if (ldcache == 0) { 819 if (ldcache == NULL) {
731 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1) 820 if (fstatat(root_fd, cachefile, &st, 0))
821 return NULL;
822
823 fd = openat(root_fd, cachefile, O_RDONLY);
824 if (fd == -1)
732 return NULL; 825 return NULL;
733 826
734 /* cache these values so we only map/unmap the cache file once */ 827 /* cache these values so we only map/unmap the cache file once */
735 ldcache_size = st.st_size; 828 ldcache_size = st.st_size;
736 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 829 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
737
738 close(fd); 830 close(fd);
739 831
740 if (ldcache == (caddr_t)-1) { 832 if (ldcache == MAP_FAILED) {
741 ldcache = 0; 833 ldcache = NULL;
742 return NULL; 834 return NULL;
743 } 835 }
744 836
745 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN)) 837 if (memcmp(header->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN) ||
838 memcmp(header->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
839 {
840 munmap(ldcache, ldcache_size);
841 ldcache = NULL;
746 return NULL; 842 return NULL;
747 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
748 return NULL;
749 } 843 }
844 } else
845 header = ldcache;
750 846
751 header = (header_t *) ldcache;
752 libent = (libentry_t *) (ldcache + sizeof(header_t)); 847 libent = ldcache + sizeof(header_t);
753 strs = (char *) &libent[header->nlibs]; 848 strs = (char *) &libent[header->nlibs];
754 849
755 for (fd = 0; fd < header->nlibs; fd++) { 850 for (fd = 0; fd < header->nlibs; ++fd) {
756 /* this should be more fine grained, but for now we assume that 851 /* This should be more fine grained, but for now we assume that
757 * diff arches will not be cached together. and we ignore the 852 * diff arches will not be cached together, and we ignore the
758 * the different multilib mips cases. */ 853 * the different multilib mips cases.
854 */
759 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 855 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
760 continue; 856 continue;
761 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 857 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
762 continue; 858 continue;
763 859
764 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 860 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
765 continue; 861 continue;
862
863 /* Return first hit because that is how the ldso rolls */
766 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 864 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
865 break;
767 } 866 }
867
768 return buf; 868 return buf;
769} 869}
870
770#elif defined(__NetBSD__) 871#elif defined(__NetBSD__)
771static char *lookup_cache_lib(elfobj *elf, char *fname) 872static char *lookup_cache_lib(elfobj *elf, const char *fname)
772{ 873{
773 static char buf[__PAX_UTILS_PATH_MAX] = ""; 874 static char buf[__PAX_UTILS_PATH_MAX] = "";
774 static struct stat st; 875 static struct stat st;
775 876 size_t n;
776 char **ldpath; 877 char *ldpath;
777 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 878
879 array_for_each(ldpath, n, ldpath) {
778 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", *ldpath, fname) >= sizeof(buf)) 880 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", ldpath, fname) >= sizeof(buf))
779 continue; /* if the pathname is too long, or something went wrong, ignore */ 881 continue; /* if the pathname is too long, or something went wrong, ignore */
780 882
781 if (stat(buf, &st) != 0) 883 if (stat(buf, &st) != 0)
782 continue; /* if the lib doesn't exist in *ldpath, look further */ 884 continue; /* if the lib doesn't exist in *ldpath, look further */
783 885
791 893
792 /* not found in any path */ 894 /* not found in any path */
793 return NULL; 895 return NULL;
794} 896}
795#else 897#else
898#ifdef __ELF__
796#warning Cache support not implemented for your target 899#warning Cache support not implemented for your target
900#endif
797static char *lookup_cache_lib(elfobj *elf, char *fname) 901static char *lookup_cache_lib(elfobj *elf, const char *fname)
798{ 902{
799 return NULL; 903 return NULL;
800} 904}
801#endif 905#endif
906
907static char *lookup_config_lib(elfobj *elf, char *fname)
908{
909 static char buf[__PAX_UTILS_PATH_MAX] = "";
910 const char *ldpath;
911 size_t n;
912
913 array_for_each(ldpaths, n, ldpath) {
914 snprintf(buf, sizeof(buf), "%s/%s", root_rel_path(ldpath), fname);
915 if (faccessat(root_fd, buf, F_OK, AT_SYMLINK_NOFOLLOW) == 0)
916 return buf;
917 }
918
919 return NULL;
920}
802 921
803static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len) 922static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
804{ 923{
805 unsigned long i; 924 unsigned long i;
806 char *needed; 925 char *needed;
807 void *strtbl_void; 926 void *strtbl_void;
808 char *p; 927 char *p;
809 928
929 /*
930 * -n -> op==0 -> print all
931 * -N -> op==1 -> print requested
932 */
810 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 933 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
934 return NULL;
811 935
812 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 936 strtbl_void = elf_findsecbyname(elf, ".dynstr");
813 937
814 if (elf->phdr && strtbl_void) { 938 if (elf->phdr && strtbl_void) {
815#define SHOW_NEEDED(B) \ 939#define SHOW_NEEDED(B) \
817 Elf ## B ## _Dyn *dyn; \ 941 Elf ## B ## _Dyn *dyn; \
818 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 942 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
819 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 943 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
820 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 944 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
821 Elf ## B ## _Off offset; \ 945 Elf ## B ## _Off offset; \
946 size_t matched = 0; \
947 /* Walk all the program headers to find the PT_DYNAMIC */ \
822 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 948 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
823 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 949 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) \
950 continue; \
824 offset = EGET(phdr[i].p_offset); \ 951 offset = EGET(phdr[i].p_offset); \
825 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 952 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) \
953 continue; \
954 /* Walk all the dynamic tags to find NEEDED entries */ \
826 dyn = DYN ## B (elf->data + offset); \ 955 dyn = DYN ## B (elf->vdata + offset); \
827 while (EGET(dyn->d_tag) != DT_NULL) { \ 956 while (EGET(dyn->d_tag) != DT_NULL) { \
828 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 957 if (EGET(dyn->d_tag) == DT_NEEDED) { \
829 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 958 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
830 if (offset >= (Elf ## B ## _Off)elf->len) { \ 959 if (offset >= (Elf ## B ## _Off)elf->len) { \
831 ++dyn; \ 960 ++dyn; \
832 continue; \ 961 continue; \
833 } \ 962 } \
834 needed = (char*)(elf->data + offset); \ 963 needed = elf->data + offset; \
835 if (op == 0) { \ 964 if (op == 0) { \
965 /* -n -> print all entries */ \
836 if (!be_wewy_wewy_quiet) { \ 966 if (!be_wewy_wewy_quiet) { \
837 if (*found_needed) xchrcat(ret, ',', ret_len); \ 967 if (*found_needed) xchrcat(ret, ',', ret_len); \
838 if (use_ldcache) \ 968 if (use_ldpath) { \
969 if ((p = lookup_config_lib(elf, needed)) != NULL) \
970 needed = p; \
971 } else if (use_ldcache) { \
839 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 972 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
840 needed = p; \ 973 needed = p; \
974 } \
841 xstrcat(ret, needed, ret_len); \ 975 xstrcat(ret, needed, ret_len); \
842 } \ 976 } \
843 *found_needed = 1; \ 977 *found_needed = 1; \
844 } else { \ 978 } else { \
845 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \ 979 /* -N -> print matching entries */ \
980 size_t n; \
981 const char *find_lib_name; \
982 \
983 array_for_each(find_lib_arr, n, find_lib_name) { \
984 int invert = 1; \
985 if (find_lib_name[0] == '!') \
986 invert = 0, ++find_lib_name; \
987 if (!strcmp(find_lib_name, needed) == invert) \
988 ++matched; \
989 } \
990 \
991 if (matched == array_cnt(find_lib_arr)) { \
846 *found_lib = 1; \ 992 *found_lib = 1; \
847 return (be_wewy_wewy_quiet ? NULL : needed); \ 993 return (be_wewy_wewy_quiet ? NULL : find_lib); \
848 } \ 994 } \
849 } \ 995 } \
850 } \ 996 } \
851 ++dyn; \ 997 ++dyn; \
852 } \ 998 } \
897 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 1043 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
898 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 1044 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
899 dynamic = 1; \ 1045 dynamic = 1; \
900 offset = EGET(phdr[i].p_offset); \ 1046 offset = EGET(phdr[i].p_offset); \
901 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 1047 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
902 dyn = DYN ## B (elf->data + offset); \ 1048 dyn = DYN ## B (elf->vdata + offset); \
903 while (EGET(dyn->d_tag) != DT_NULL) { \ 1049 while (EGET(dyn->d_tag) != DT_NULL) { \
904 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 1050 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
905 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \ 1051 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
906 { \ 1052 { \
907 if (be_quiet) return NULL; \ 1053 if (be_quiet) return NULL; \
920 /* don't output anything if quiet mode and the ELF is static or not setuid */ 1066 /* don't output anything if quiet mode and the ELF is static or not setuid */
921 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) { 1067 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
922 return NULL; 1068 return NULL;
923 } else { 1069 } else {
924 *found_bind = 1; 1070 *found_bind = 1;
925 return (char *) (dynamic ? "LAZY" : "STATIC"); 1071 return (char *)(dynamic ? "LAZY" : "STATIC");
926 } 1072 }
927} 1073}
928static char *scanelf_file_soname(elfobj *elf, char *found_soname) 1074static char *scanelf_file_soname(elfobj *elf, char *found_soname)
929{ 1075{
930 unsigned long i; 1076 unsigned long i;
942 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 1088 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
943 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 1089 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
944 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 1090 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
945 Elf ## B ## _Off offset; \ 1091 Elf ## B ## _Off offset; \
946 /* only look for soname in shared objects */ \ 1092 /* only look for soname in shared objects */ \
947 if (ehdr->e_type != ET_DYN) \ 1093 if (EGET(ehdr->e_type) != ET_DYN) \
948 return NULL; \ 1094 return NULL; \
949 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 1095 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
950 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 1096 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
951 offset = EGET(phdr[i].p_offset); \ 1097 offset = EGET(phdr[i].p_offset); \
952 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 1098 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
953 dyn = DYN ## B (elf->data + offset); \ 1099 dyn = DYN ## B (elf->vdata + offset); \
954 while (EGET(dyn->d_tag) != DT_NULL) { \ 1100 while (EGET(dyn->d_tag) != DT_NULL) { \
955 if (EGET(dyn->d_tag) == DT_SONAME) { \ 1101 if (EGET(dyn->d_tag) == DT_SONAME) { \
956 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 1102 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
957 if (offset >= (Elf ## B ## _Off)elf->len) { \ 1103 if (offset >= (Elf ## B ## _Off)elf->len) { \
958 ++dyn; \ 1104 ++dyn; \
959 continue; \ 1105 continue; \
960 } \ 1106 } \
961 soname = (char*)(elf->data + offset); \ 1107 soname = elf->data + offset; \
962 *found_soname = 1; \ 1108 *found_soname = 1; \
963 return (be_wewy_wewy_quiet ? NULL : soname); \ 1109 return (be_wewy_wewy_quiet ? NULL : soname); \
964 } \ 1110 } \
965 ++dyn; \ 1111 ++dyn; \
966 } \ 1112 } \
970 } 1116 }
971 1117
972 return NULL; 1118 return NULL;
973} 1119}
974 1120
1121/*
1122 * We support the symbol form:
1123 * [%[modifiers]%][[+-]<symbol name>][,[.....]]
1124 * If the symbol name is empty, then all symbols are matched.
1125 * If the symbol name is a glob ("*"), then all symbols are dumped (debug).
1126 * Do not rely on this output format at all.
1127 * Otherwise the symbol name is used to search (either regex or string compare).
1128 * If the first char of the symbol name is a plus ("+"), then only match
1129 * defined symbols. If it's a minus ("-"), only match undefined symbols.
1130 * Putting modifiers in between the percent signs allows for more in depth
1131 * filters. There are groups of modifiers. If you don't specify a member
1132 * of a group, then all types in that group are matched. The current
1133 * groups and their types are:
1134 * STT group: STT_NOTYPE:n STT_OBJECT:o STT_FUNC:f STT_FILE:F
1135 * STB group: STB_LOCAL:l STB_GLOBAL:g STB_WEAK:w
1136 * SHN group: SHN_UNDEF:u SHN_ABS:a SHN_COMMON:c {defined}:d
1137 * The "defined" value in the SHN group does not correspond to a SHN_xxx define.
1138 * You can search for multiple symbols at once by seperating with a comma (",").
1139 *
1140 * Some examples:
1141 * ELFs with a weak function "foo":
1142 * scanelf -s %wf%foo <ELFs>
1143 * ELFs that define the symbol "main":
1144 * scanelf -s +main <ELFs>
1145 * scanelf -s %d%main <ELFs>
1146 * ELFs that refer to the undefined symbol "brk":
1147 * scanelf -s -brk <ELFs>
1148 * scanelf -s %u%brk <ELFs>
1149 * All global defined objects in an ELF:
1150 * scanelf -s %ogd% <ELF>
1151 */
1152static void
1153scanelf_match_symname(elfobj *elf, char *found_sym, char **ret, size_t *ret_len, const char *symname,
1154 unsigned int stt, unsigned int stb, unsigned int shn, unsigned long size)
1155{
1156 const char *this_sym;
1157 size_t n;
1158
1159 array_for_each(find_sym_arr, n, this_sym) {
1160 bool inc_notype, inc_object, inc_func, inc_file,
1161 inc_local, inc_global, inc_weak,
1162 inc_def, inc_undef, inc_abs, inc_common;
1163
1164 /* symbol selection! */
1165 inc_notype = inc_object = inc_func = inc_file = \
1166 inc_local = inc_global = inc_weak = \
1167 inc_def = inc_undef = inc_abs = inc_common = \
1168 (*this_sym != '%');
1169
1170 /* parse the contents of %...% */
1171 if (!inc_notype) {
1172 while (*(this_sym++)) {
1173 if (*this_sym == '%') {
1174 ++this_sym;
1175 break;
1176 }
1177 switch (*this_sym) {
1178 case 'n': inc_notype = true; break;
1179 case 'o': inc_object = true; break;
1180 case 'f': inc_func = true; break;
1181 case 'F': inc_file = true; break;
1182 case 'l': inc_local = true; break;
1183 case 'g': inc_global = true; break;
1184 case 'w': inc_weak = true; break;
1185 case 'd': inc_def = true; break;
1186 case 'u': inc_undef = true; break;
1187 case 'a': inc_abs = true; break;
1188 case 'c': inc_common = true; break;
1189 default: err("invalid symbol selector '%c'", *this_sym);
1190 }
1191 }
1192
1193 /* If no types are matched, not match all */
1194 if (!inc_notype && !inc_object && !inc_func && !inc_file)
1195 inc_notype = inc_object = inc_func = inc_file = true;
1196 if (!inc_local && !inc_global && !inc_weak)
1197 inc_local = inc_global = inc_weak = true;
1198 if (!inc_def && !inc_undef && !inc_abs && !inc_common)
1199 inc_def = inc_undef = inc_abs = inc_common = true;
1200
1201 /* backwards compat for defined/undefined short hand */
1202 } else if (*this_sym == '+') {
1203 inc_undef = false;
1204 ++this_sym;
1205 } else if (*this_sym == '-') {
1206 inc_def = inc_abs = inc_common = false;
1207 ++this_sym;
1208 }
1209
1210 /* filter symbols */
1211 if ((!inc_notype && stt == STT_NOTYPE) || \
1212 (!inc_object && stt == STT_OBJECT) || \
1213 (!inc_func && stt == STT_FUNC ) || \
1214 (!inc_file && stt == STT_FILE ) || \
1215 (!inc_local && stb == STB_LOCAL ) || \
1216 (!inc_global && stb == STB_GLOBAL) || \
1217 (!inc_weak && stb == STB_WEAK ) || \
1218 (!inc_def && shn && shn < SHN_LORESERVE) || \
1219 (!inc_undef && shn == SHN_UNDEF ) || \
1220 (!inc_abs && shn == SHN_ABS ) || \
1221 (!inc_common && shn == SHN_COMMON))
1222 continue;
1223
1224 if (*this_sym == '*') {
1225 /* a "*" symbol gets you debug output */
1226 printf("%s(%s) %5lX %15s %15s %15s %s\n",
1227 ((*found_sym == 0) ? "\n\t" : "\t"),
1228 elf->base_filename,
1229 size,
1230 get_elfstttype(stt),
1231 get_elfstbtype(stb),
1232 get_elfshntype(shn),
1233 symname);
1234 goto matched;
1235
1236 } else {
1237 if (g_match) {
1238 /* regex match the symbol */
1239 if (regexec(find_sym_regex_arr->eles[n], symname, 0, NULL, 0) == REG_NOMATCH)
1240 continue;
1241
1242 } else if (*this_sym) {
1243 /* give empty symbols a "pass", else do a normal compare */
1244 const size_t len = strlen(this_sym);
1245 if (!(strncmp(this_sym, symname, len) == 0 &&
1246 /* Accept unversioned symbol names */
1247 (symname[len] == '\0' || symname[len] == '@')))
1248 continue;
1249 }
1250
1251 if (be_semi_verbose) {
1252 char buf[1024];
1253 snprintf(buf, sizeof(buf), "%lX %s %s",
1254 size,
1255 get_elfstttype(stt),
1256 this_sym);
1257 *ret = xstrdup(buf);
1258 } else {
1259 if (*ret) xchrcat(ret, ',', ret_len);
1260 xstrcat(ret, symname, ret_len);
1261 }
1262
1263 goto matched;
1264 }
1265 }
1266
1267 return;
1268
1269 matched:
1270 *found_sym = 1;
1271}
1272
975static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1273static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
976{ 1274{
977 unsigned long i;
978 char *ret; 1275 char *ret;
979 void *symtab_void, *strtab_void; 1276 void *symtab_void, *strtab_void;
980 1277
981 if (!find_sym) return NULL; 1278 if (!find_sym) return NULL;
982 ret = find_sym; 1279 ret = NULL;
983 1280
984 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1281 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
985 1282
986 if (symtab_void && strtab_void) { 1283 if (symtab_void && strtab_void) {
987#define FIND_SYM(B) \ 1284#define FIND_SYM(B) \
988 if (elf->elf_class == ELFCLASS ## B) { \ 1285 if (elf->elf_class == ELFCLASS ## B) { \
989 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1286 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
990 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1287 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
991 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 1288 Elf ## B ## _Sym *sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
992 unsigned long cnt = EGET(symtab->sh_entsize); \ 1289 Elf ## B ## _Word i, cnt = EGET(symtab->sh_entsize); \
993 char *symname; \ 1290 char *symname; \
1291 size_t ret_len = 0; \
994 if (cnt) \ 1292 if (cnt) \
995 cnt = EGET(symtab->sh_size) / cnt; \ 1293 cnt = EGET(symtab->sh_size) / cnt; \
996 for (i = 0; i < cnt; ++i) { \ 1294 for (i = 0; i < cnt; ++i) { \
1295 if ((void*)sym > elf->data_end) { \
1296 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1297 goto break_out; \
1298 } \
997 if (sym->st_name) { \ 1299 if (sym->st_name) { \
998 /* make sure the symbol name is in acceptable memory range */ \ 1300 /* make sure the symbol name is in acceptable memory range */ \
999 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1301 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
1000 if ((void*)symname > (void*)elf->data_end) { \ 1302 if ((void*)symname > elf->data_end) { \
1001 warnf("%s: corrupt ELF symbols", elf->filename); \ 1303 warnf("%s: corrupt ELF symbols", elf->filename); \
1002 ++sym; \ 1304 ++sym; \
1003 continue; \ 1305 continue; \
1004 } \ 1306 } \
1005 /* debug display ... show all symbols and some extra info */ \ 1307 scanelf_match_symname(elf, found_sym, \
1006 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \ 1308 &ret, &ret_len, symname, \
1007 printf("%s(%s) %5lX %15s %s %s\n", \ 1309 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
1008 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1310 ELF##B##_ST_BIND(EGET(sym->st_info)), \
1009 elf->base_filename, \ 1311 EGET(sym->st_shndx), \
1010 (unsigned long)sym->st_size, \ 1312 /* st_size can be 64bit, but no one is really that big, so screw em */ \
1011 get_elfstttype(sym->st_info), \ 1313 EGET(sym->st_size)); \
1012 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1013 *found_sym = 1; \
1014 } else { \
1015 /* allow the user to specify a comma delimited list of symbols to search for */ \
1016 char *this_sym, *this_sym_ver, *next_sym; \
1017 this_sym = ret; \
1018 this_sym_ver = versioned_symname; \
1019 do { \
1020 next_sym = strchr(this_sym, ','); \
1021 if (next_sym == NULL) \
1022 next_sym = this_sym + strlen(this_sym); \
1023 /* do we want a defined symbol ? */ \
1024 if (*this_sym == '+') { \
1025 if (sym->st_shndx == SHN_UNDEF) \
1026 goto skip_this_sym##B; \
1027 ++this_sym; \
1028 ++this_sym_ver; \
1029 /* do we want an undefined symbol ? */ \
1030 } else if (*this_sym == '-') { \
1031 if (sym->st_shndx != SHN_UNDEF) \
1032 goto skip_this_sym##B; \
1033 ++this_sym; \
1034 ++this_sym_ver; \
1035 } \
1036 /* ok, lets compare the name now */ \
1037 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
1038 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
1039 if (be_semi_verbose) { \
1040 char buf[126]; \
1041 snprintf(buf, sizeof(buf), "%lX %s %s", \
1042 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1043 ret = buf; \
1044 } else \
1045 ret = this_sym; \
1046 (*found_sym)++; \
1047 goto break_out; \
1048 } \
1049 skip_this_sym##B: this_sym = next_sym + 1; \
1050 } while (*next_sym != '\0'); \
1051 } \
1052 } \ 1314 } \
1053 ++sym; \ 1315 ++sym; \
1054 } } 1316 } \
1317 }
1055 FIND_SYM(32) 1318 FIND_SYM(32)
1056 FIND_SYM(64) 1319 FIND_SYM(64)
1057 } 1320 }
1058 1321
1059break_out: 1322break_out:
1062 if (*find_sym != '*' && *found_sym) 1325 if (*find_sym != '*' && *found_sym)
1063 return ret; 1326 return ret;
1064 if (be_quiet) 1327 if (be_quiet)
1065 return NULL; 1328 return NULL;
1066 else 1329 else
1067 return (char *)" - "; 1330 return " - ";
1068} 1331}
1069 1332
1070
1071static char *scanelf_file_sections(elfobj *elf, char *found_section) 1333static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1072{ 1334{
1073 if (!find_section) 1335 if (!find_section)
1074 return NULL; 1336 return NULL;
1075 1337
1076#define FIND_SECTION(B) \ 1338#define FIND_SECTION(B) \
1077 if (elf->elf_class == ELFCLASS ## B) { \ 1339 if (elf->elf_class == ELFCLASS ## B) { \
1340 size_t matched, n; \
1078 int invert; \ 1341 int invert; \
1342 const char *section_name; \
1079 Elf ## B ## _Shdr *section; \ 1343 Elf ## B ## _Shdr *section; \
1344 \
1345 matched = 0; \
1346 array_for_each(find_section_arr, n, section_name) { \
1080 invert = (*find_section == '!' ? 1 : 0); \ 1347 invert = (*section_name == '!' ? 1 : 0); \
1081 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1348 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1082 if ((section == NULL && invert) || (section != NULL && !invert)) \ 1349 if ((section == NULL && invert) || (section != NULL && !invert)) \
1350 ++matched; \
1351 } \
1352 \
1353 if (matched == array_cnt(find_section_arr)) \
1083 *found_section = 1; \ 1354 *found_section = 1; \
1084 } 1355 }
1085 FIND_SECTION(32) 1356 FIND_SECTION(32)
1086 FIND_SECTION(64) 1357 FIND_SECTION(64)
1087 1358
1092 return find_section; 1363 return find_section;
1093 1364
1094 if (be_quiet) 1365 if (be_quiet)
1095 return NULL; 1366 return NULL;
1096 else 1367 else
1097 return (char *)" - "; 1368 return " - ";
1098} 1369}
1099 1370
1100/* scan an elf file and show all the fun stuff */ 1371/* scan an elf file and show all the fun stuff */
1101#define prints(str) write(fileno(stdout), str, strlen(str)) 1372#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1102static int scanelf_elfobj(elfobj *elf) 1373static int scanelf_elfobj(elfobj *elf)
1103{ 1374{
1104 unsigned long i; 1375 unsigned long i;
1105 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1376 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1106 found_rpath, found_needed, found_interp, found_bind, found_soname, 1377 found_rpath, found_needed, found_interp, found_bind, found_soname,
1120 printf("%s: scanning file\n", elf->filename); 1391 printf("%s: scanning file\n", elf->filename);
1121 1392
1122 /* init output buffer */ 1393 /* init output buffer */
1123 if (!out_buffer) { 1394 if (!out_buffer) {
1124 out_len = sizeof(char) * 80; 1395 out_len = sizeof(char) * 80;
1125 out_buffer = (char*)xmalloc(out_len); 1396 out_buffer = xmalloc(out_len);
1126 } 1397 }
1127 *out_buffer = '\0'; 1398 *out_buffer = '\0';
1128 1399
1129 /* show the header */ 1400 /* show the header */
1130 if (!be_quiet && show_banner) { 1401 if (!be_quiet && show_banner) {
1142 case 'x': prints(" PAX "); break; 1413 case 'x': prints(" PAX "); break;
1143 case 'e': prints("STK/REL/PTL "); break; 1414 case 'e': prints("STK/REL/PTL "); break;
1144 case 't': prints("TEXTREL "); break; 1415 case 't': prints("TEXTREL "); break;
1145 case 'r': prints("RPATH "); break; 1416 case 'r': prints("RPATH "); break;
1146 case 'M': prints("CLASS "); break; 1417 case 'M': prints("CLASS "); break;
1418 case 'l':
1147 case 'n': prints("NEEDED "); break; 1419 case 'n': prints("NEEDED "); break;
1148 case 'i': prints("INTERP "); break; 1420 case 'i': prints("INTERP "); break;
1149 case 'b': prints("BIND "); break; 1421 case 'b': prints("BIND "); break;
1422 case 'Z': prints("SIZE "); break;
1150 case 'S': prints("SONAME "); break; 1423 case 'S': prints("SONAME "); break;
1151 case 's': prints("SYM "); break; 1424 case 's': prints("SYM "); break;
1152 case 'N': prints("LIB "); break; 1425 case 'N': prints("LIB "); break;
1153 case 'T': prints("TEXTRELS "); break; 1426 case 'T': prints("TEXTRELS "); break;
1154 case 'k': prints("SECTION "); break; 1427 case 'k': prints("SECTION "); break;
1155 case 'a': prints("ARCH "); break; 1428 case 'a': prints("ARCH "); break;
1429 case 'I': prints("OSABI "); break;
1430 case 'Y': prints("EABI "); break;
1156 case 'O': prints("PERM "); break; 1431 case 'O': prints("PERM "); break;
1157 case 'D': prints("ENDIAN "); break; 1432 case 'D': prints("ENDIAN "); break;
1158 default: warnf("'%c' has no title ?", out_format[i]); 1433 default: warnf("'%c' has no title ?", out_format[i]);
1159 } 1434 }
1160 } 1435 }
1166 1441
1167 /* dump all the good stuff */ 1442 /* dump all the good stuff */
1168 for (i = 0; out_format[i]; ++i) { 1443 for (i = 0; out_format[i]; ++i) {
1169 const char *out; 1444 const char *out;
1170 const char *tmp; 1445 const char *tmp;
1171 1446 static char ubuf[sizeof(unsigned long)*2];
1172 if (!IS_MODIFIER(out_format[i])) { 1447 if (!IS_MODIFIER(out_format[i])) {
1173 xchrcat(&out_buffer, out_format[i], &out_len); 1448 xchrcat(&out_buffer, out_format[i], &out_len);
1174 continue; 1449 continue;
1175 } 1450 }
1176 1451
1214 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1489 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1215 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break; 1490 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
1216 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 1491 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1217 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break; 1492 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1218 case 'D': out = get_endian(elf); break; 1493 case 'D': out = get_endian(elf); break;
1219 case 'O': out = getstr_perms(elf->filename); break; 1494 case 'O': out = strfileperms(elf->filename); break;
1220 case 'n': 1495 case 'n':
1221 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; 1496 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
1222 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1497 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1223 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1498 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1224 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1499 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1225 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1500 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1226 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1501 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1227 case 'a': out = get_elfemtype(elf); break; 1502 case 'a': out = get_elfemtype(elf); break;
1503 case 'I': out = get_elfosabi(elf); break;
1504 case 'Y': out = get_elf_eabi(elf); break;
1505 case 'Z': snprintf(ubuf, sizeof(ubuf), "%lu", (unsigned long)elf->len); out = ubuf; break;;
1228 default: warnf("'%c' has no scan code?", out_format[i]); 1506 default: warnf("'%c' has no scan code?", out_format[i]);
1229 } 1507 }
1230 if (out) { 1508 if (out)
1231 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1232 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1233 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1234 else
1235 xstrcat(&out_buffer, out, &out_len); 1509 xstrcat(&out_buffer, out, &out_len);
1236 }
1237 } 1510 }
1238 1511
1239#define FOUND_SOMETHING() \ 1512#define FOUND_SOMETHING() \
1240 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1513 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1241 found_rpath || found_needed || found_interp || found_bind || \ 1514 found_rpath || found_needed || found_interp || found_bind || \
1260 elfobj *elf; 1533 elfobj *elf;
1261 1534
1262 /* verify this is real ELF */ 1535 /* verify this is real ELF */
1263 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) { 1536 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1264 if (be_verbose > 2) printf("%s: not an ELF\n", filename); 1537 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1265 return ret; 1538 return 2;
1266 } 1539 }
1267 switch (match_bits) { 1540 switch (match_bits) {
1268 case 32: 1541 case 32:
1269 if (elf->elf_class != ELFCLASS32) 1542 if (elf->elf_class != ELFCLASS32)
1270 goto label_done; 1543 goto label_done;
1273 if (elf->elf_class != ELFCLASS64) 1546 if (elf->elf_class != ELFCLASS64)
1274 goto label_done; 1547 goto label_done;
1275 break; 1548 break;
1276 default: break; 1549 default: break;
1277 } 1550 }
1278 if (strlen(match_etypes)) { 1551 if (match_etypes) {
1279 char sbuf[126]; 1552 char sbuf[126];
1280 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1553 strncpy(sbuf, match_etypes, sizeof(sbuf));
1281 if (strchr(match_etypes, ',') != NULL) { 1554 if (strchr(match_etypes, ',') != NULL) {
1282 char *p; 1555 char *p;
1283 while((p = strrchr(sbuf, ',')) != NULL) { 1556 while ((p = strrchr(sbuf, ',')) != NULL) {
1284 *p = 0; 1557 *p = 0;
1285 if (etype_lookup(p+1) == get_etype(elf)) 1558 if (etype_lookup(p+1) == get_etype(elf))
1286 goto label_ret; 1559 goto label_ret;
1287 } 1560 }
1288 } 1561 }
1308 1581
1309 ar = ar_open_fd(filename, fd); 1582 ar = ar_open_fd(filename, fd);
1310 if (ar == NULL) 1583 if (ar == NULL)
1311 return 1; 1584 return 1;
1312 1585
1313 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0); 1586 ar_buffer = mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1314 while ((m=ar_next(ar)) != NULL) { 1587 while ((m = ar_next(ar)) != NULL) {
1588 off_t cur_pos = lseek(fd, 0, SEEK_CUR);
1589 if (cur_pos == -1)
1590 errp("lseek() failed");
1315 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size); 1591 elf = readelf_buffer(m->name, ar_buffer + cur_pos, m->size);
1316 if (elf) { 1592 if (elf) {
1317 scanelf_elfobj(elf); 1593 scanelf_elfobj(elf);
1318 unreadelf(elf); 1594 unreadelf(elf);
1319 } 1595 }
1320 } 1596 }
1321 munmap(ar_buffer, len); 1597 munmap(ar_buffer, len);
1322 1598
1323 return 0; 1599 return 0;
1324} 1600}
1325/* scan a file which may be an elf or an archive or some other magical beast */ 1601/* scan a file which may be an elf or an archive or some other magical beast */
1326static int scanelf_file(const char *filename, const struct stat *st_cache) 1602static int scanelf_fileat(int dir_fd, const char *filename, const struct stat *st_cache)
1327{ 1603{
1328 const struct stat *st = st_cache; 1604 const struct stat *st = st_cache;
1329 struct stat symlink_st; 1605 struct stat symlink_st;
1330 int fd; 1606 int fd;
1331 1607
1332 /* always handle regular files and handle symlinked files if no -y */ 1608 /* always handle regular files and handle symlinked files if no -y */
1333 if (S_ISLNK(st->st_mode)) { 1609 if (S_ISLNK(st->st_mode)) {
1334 if (!scan_symlink) return 1; 1610 if (!scan_symlink)
1611 return 1;
1335 stat(filename, &symlink_st); 1612 fstatat(dir_fd, filename, &symlink_st, 0);
1336 st = &symlink_st; 1613 st = &symlink_st;
1337 } 1614 }
1338 1615
1339 if (!S_ISREG(st->st_mode)) { 1616 if (!S_ISREG(st->st_mode)) {
1340 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1617 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1343 1620
1344 if (match_perms) { 1621 if (match_perms) {
1345 if ((st->st_mode | match_perms) != st->st_mode) 1622 if ((st->st_mode | match_perms) != st->st_mode)
1346 return 1; 1623 return 1;
1347 } 1624 }
1348 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1625 fd = openat(dir_fd, filename, (fix_elf ? O_RDWR : O_RDONLY) | O_CLOEXEC);
1626 if (fd == -1) {
1627 if (fix_elf && errno == ETXTBSY)
1628 warnp("%s: could not fix", filename);
1629 else if (be_verbose > 2)
1630 printf("%s: skipping file: %s\n", filename, strerror(errno));
1349 return 1; 1631 return 1;
1632 }
1350 1633
1351 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives) 1634 if (scanelf_elf(filename, fd, st->st_size) == 2) {
1352 /* if it isn't an ELF, maybe it's an .a archive */ 1635 /* if it isn't an ELF, maybe it's an .a archive */
1636 if (scan_archives)
1353 scanelf_archive(filename, fd, st->st_size); 1637 scanelf_archive(filename, fd, st->st_size);
1354 1638
1639 /*
1640 * unreadelf() implicitly closes its fd, so only close it
1641 * when we are returning it in the non-ELF case
1642 */
1355 close(fd); 1643 close(fd);
1644 }
1645
1356 return 0; 1646 return 0;
1357} 1647}
1358 1648
1359/* scan a directory for ET_EXEC files and print when we find one */ 1649/* scan a directory for ET_EXEC files and print when we find one */
1360static int scanelf_dir(const char *path) 1650static int scanelf_dirat(int dir_fd, const char *path)
1361{ 1651{
1362 register DIR *dir; 1652 register DIR *dir;
1363 register struct dirent *dentry; 1653 register struct dirent *dentry;
1364 struct stat st_top, st; 1654 struct stat st_top, st;
1365 char buf[__PAX_UTILS_PATH_MAX]; 1655 char buf[__PAX_UTILS_PATH_MAX], *subpath;
1366 size_t pathlen = 0, len = 0; 1656 size_t pathlen = 0, len = 0;
1367 int ret = 0; 1657 int ret = 0;
1658 int subdir_fd;
1368 1659
1369 /* make sure path exists */ 1660 /* make sure path exists */
1370 if (lstat(path, &st_top) == -1) { 1661 if (fstatat(dir_fd, path, &st_top, AT_SYMLINK_NOFOLLOW) == -1) {
1371 if (be_verbose > 2) printf("%s: does not exist\n", path); 1662 if (be_verbose > 2) printf("%s: does not exist\n", path);
1372 return 1; 1663 return 1;
1373 } 1664 }
1374 1665
1375 /* ok, if it isn't a directory, assume we can open it */ 1666 /* ok, if it isn't a directory, assume we can open it */
1376 if (!S_ISDIR(st_top.st_mode)) { 1667 if (!S_ISDIR(st_top.st_mode))
1377 return scanelf_file(path, &st_top); 1668 return scanelf_fileat(dir_fd, path, &st_top);
1378 }
1379 1669
1380 /* now scan the dir looking for fun stuff */ 1670 /* now scan the dir looking for fun stuff */
1381 if ((dir = opendir(path)) == NULL) { 1671 subdir_fd = openat(dir_fd, path, O_RDONLY|O_CLOEXEC);
1382 warnf("could not opendir %s: %s", path, strerror(errno)); 1672 if (subdir_fd == -1)
1673 dir = NULL;
1674 else
1675 dir = fdopendir(subdir_fd);
1676 if (dir == NULL) {
1677 if (subdir_fd != -1)
1678 close(subdir_fd);
1679 warnfp("could not opendir(%s)", path);
1383 return 1; 1680 return 1;
1384 } 1681 }
1385 if (be_verbose > 1) printf("%s: scanning dir\n", path); 1682 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1386 1683
1387 pathlen = strlen(path); 1684 subpath = stpcpy(buf, path);
1685 if (subpath[-1] != '/')
1686 *subpath++ = '/';
1687 pathlen = subpath - buf;
1388 while ((dentry = readdir(dir))) { 1688 while ((dentry = readdir(dir))) {
1389 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 1689 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
1390 continue; 1690 continue;
1691
1692 if (fstatat(subdir_fd, dentry->d_name, &st, AT_SYMLINK_NOFOLLOW) == -1)
1693 continue;
1694
1391 len = (pathlen + 1 + strlen(dentry->d_name) + 1); 1695 len = strlen(dentry->d_name);
1392 if (len >= sizeof(buf)) { 1696 if (len + pathlen + 1 >= sizeof(buf)) {
1393 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, 1697 warnf("Skipping '%s%s': len > sizeof(buf); %zu > %zu\n",
1394 (unsigned long)len, (unsigned long)sizeof(buf)); 1698 path, dentry->d_name, len + pathlen + 1, sizeof(buf));
1395 continue; 1699 continue;
1396 } 1700 }
1397 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name); 1701 memcpy(subpath, dentry->d_name, len);
1398 if (lstat(buf, &st) != -1) { 1702 subpath[len] = '\0';
1703
1399 if (S_ISREG(st.st_mode)) 1704 if (S_ISREG(st.st_mode))
1400 ret = scanelf_file(buf, &st); 1705 ret = scanelf_fileat(dir_fd, buf, &st);
1401 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1706 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1402 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1707 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1403 ret = scanelf_dir(buf); 1708 ret = scanelf_dirat(dir_fd, buf);
1404 }
1405 } 1709 }
1406 } 1710 }
1407 closedir(dir); 1711 closedir(dir);
1712
1408 return ret; 1713 return ret;
1409} 1714}
1715static int scanelf_dir(const char *path)
1716{
1717 return scanelf_dirat(root_fd, root_rel_path(path));
1718}
1410 1719
1411static int scanelf_from_file(const char *filename) 1720static int scanelf_from_file(const char *filename)
1412{ 1721{
1413 FILE *fp = NULL; 1722 FILE *fp;
1414 char *p; 1723 char *p, *path;
1415 char path[__PAX_UTILS_PATH_MAX]; 1724 size_t len;
1416 int ret = 0; 1725 int ret;
1417 1726
1418 if (strcmp(filename, "-") == 0) 1727 if (strcmp(filename, "-") == 0)
1419 fp = stdin; 1728 fp = stdin;
1420 else if ((fp = fopen(filename, "r")) == NULL) 1729 else if ((fp = fopen(filename, "r")) == NULL)
1421 return 1; 1730 return 1;
1422 1731
1423 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1732 path = NULL;
1733 len = 0;
1734 ret = 0;
1735 while (getline(&path, &len, fp) != -1) {
1424 if ((p = strchr(path, '\n')) != NULL) 1736 if ((p = strchr(path, '\n')) != NULL)
1425 *p = 0; 1737 *p = 0;
1426 search_path = path; 1738 search_path = path;
1427 ret = scanelf_dir(path); 1739 ret = scanelf_dir(path);
1428 } 1740 }
1741 free(path);
1742
1429 if (fp != stdin) 1743 if (fp != stdin)
1430 fclose(fp); 1744 fclose(fp);
1745
1431 return ret; 1746 return ret;
1432} 1747}
1433 1748
1434#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__) 1749#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1435 1750
1436static int load_ld_cache_config(int i, const char *fname) 1751static int _load_ld_cache_config(const char *fname)
1437{ 1752{
1438 FILE *fp = NULL; 1753 FILE *fp = NULL;
1439 char *p; 1754 char *p, *path;
1440 char path[__PAX_UTILS_PATH_MAX]; 1755 size_t len;
1756 int curr_fd = -1;
1441 1757
1442 if (i + 1 == ARRAY_SIZE(ldpaths)) 1758 fp = fopenat_r(root_fd, root_rel_path(fname));
1759 if (fp == NULL)
1443 return i; 1760 return -1;
1444 1761
1445 if ((fp = fopen(fname, "r")) == NULL) 1762 path = NULL;
1446 return i; 1763 len = 0;
1447 1764 while (getline(&path, &len, fp) != -1) {
1448 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1449 if ((p = strrchr(path, '\r')) != NULL) 1765 if ((p = strrchr(path, '\r')) != NULL)
1450 *p = 0; 1766 *p = 0;
1451 if ((p = strchr(path, '\n')) != NULL) 1767 if ((p = strchr(path, '\n')) != NULL)
1452 *p = 0; 1768 *p = 0;
1453#ifdef __linux__ 1769
1454 // recursive includes of the same file will make this segfault. 1770 /* recursive includes of the same file will make this segfault. */
1455 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1771 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1456 glob64_t gl; 1772 glob_t gl;
1457 size_t x; 1773 size_t x;
1458 char gpath[__PAX_UTILS_PATH_MAX]; 1774 const char *gpath;
1459 1775
1460 memset(gpath, 0, sizeof(gpath)); 1776 /* re-use existing path buffer ... need to be creative */
1461
1462 if (path[8] != '/') 1777 if (path[8] != '/')
1463 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1778 gpath = memcpy(path + 3, "/etc/", 5);
1464 else 1779 else
1465 strncpy(gpath, &path[8], sizeof(gpath)); 1780 gpath = path + 8;
1781 if (root_fd != AT_FDCWD) {
1782 if (curr_fd == -1) {
1783 curr_fd = open(".", O_RDONLY|O_CLOEXEC);
1784 if (fchdir(root_fd))
1785 errp("unable to change to root dir");
1786 }
1787 gpath = root_rel_path(gpath);
1788 }
1466 1789
1467 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1790 if (glob(gpath, 0, NULL, &gl) == 0) {
1468 for (x = 0; x < gl.gl_pathc; ++x) { 1791 for (x = 0; x < gl.gl_pathc; ++x) {
1469 /* try to avoid direct loops */ 1792 /* try to avoid direct loops */
1470 if (strcmp(gl.gl_pathv[x], fname) == 0) 1793 if (strcmp(gl.gl_pathv[x], fname) == 0)
1471 continue; 1794 continue;
1472 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1795 _load_ld_cache_config(gl.gl_pathv[x]);
1473 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1474 globfree64(&gl);
1475 return i;
1476 }
1477 } 1796 }
1478 globfree64 (&gl); 1797 globfree(&gl);
1479 continue;
1480 } 1798 }
1799
1800 /* failed globs are ignored by glibc */
1801 continue;
1481 } 1802 }
1482#endif 1803
1483 if (*path != '/') 1804 if (*path != '/')
1484 continue; 1805 continue;
1485 1806
1486 ldpaths[i++] = xstrdup(path); 1807 xarraypush_str(ldpaths, path);
1487
1488 if (i + 1 == ARRAY_SIZE(ldpaths))
1489 break;
1490 } 1808 }
1491 ldpaths[i] = NULL; 1809 free(path);
1492 1810
1493 fclose(fp); 1811 fclose(fp);
1812
1813 if (curr_fd != -1) {
1814 if (fchdir(curr_fd))
1815 /* don't care */;
1816 close(curr_fd);
1817 }
1818
1494 return i; 1819 return 0;
1495} 1820}
1496 1821
1497#elif defined(__FreeBSD__) || (__DragonFly__) 1822#elif defined(__FreeBSD__) || defined(__DragonFly__)
1498 1823
1499static int load_ld_cache_config(int i, const char *fname) 1824static int _load_ld_cache_config(const char *fname)
1500{ 1825{
1501 FILE *fp = NULL; 1826 FILE *fp = NULL;
1502 char *b = NULL, *p; 1827 char *b = NULL, *p;
1503 struct elfhints_hdr hdr; 1828 struct elfhints_hdr hdr;
1504 1829
1505 if (i + 1 == ARRAY_SIZE(ldpaths)) 1830 fp = fopenat_r(root_fd, root_rel_path(fname));
1831 if (fp == NULL)
1506 return i; 1832 return -1;
1507
1508 if ((fp = fopen(fname, "r")) == NULL)
1509 return i;
1510 1833
1511 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1834 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1512 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 || 1835 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1513 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1) 1836 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1514 { 1837 {
1515 fclose(fp); 1838 fclose(fp);
1516 return i; 1839 return -1;
1517 } 1840 }
1518 1841
1519 b = (char*)malloc(hdr.dirlistlen+1); 1842 b = xmalloc(hdr.dirlistlen + 1);
1520 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) { 1843 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1521 fclose(fp); 1844 fclose(fp);
1522 free(b); 1845 free(b);
1523 return i; 1846 return -1;
1524 } 1847 }
1525 1848
1526 while ((p = strsep(&b, ":"))) { 1849 while ((p = strsep(&b, ":"))) {
1527 if (*p == '\0') continue; 1850 if (*p == '\0')
1528 ldpaths[i++] = xstrdup(p); 1851 continue;
1529 1852 xarraypush_str(ldpaths, p);
1530 if (i + 1 == ARRAY_SIZE(ldpaths))
1531 break;
1532 } 1853 }
1533 ldpaths[i] = NULL;
1534 1854
1535 free(b); 1855 free(b);
1536 fclose(fp); 1856 fclose(fp);
1537 return i; 1857 return 0;
1538} 1858}
1539 1859
1540#else 1860#else
1541 1861#ifdef __ELF__
1542#warning Cache config support not implemented for your target 1862#warning Cache config support not implemented for your target
1543static int load_ld_cache_config(int i, const char *fname)
1544{
1545 memset(ldpaths, 0x00, sizeof(ldpaths));
1546}
1547
1548#endif 1863#endif
1864static int _load_ld_cache_config(const char *fname)
1865{
1866 return 0;
1867}
1868#endif
1869
1870static void load_ld_cache_config(const char *fname)
1871{
1872 bool scan_l, scan_ul, scan_ull;
1873 size_t n;
1874 const char *ldpath;
1875
1876 _load_ld_cache_config(fname);
1877
1878 scan_l = scan_ul = scan_ull = false;
1879 if (array_cnt(ldpaths)) {
1880 array_for_each(ldpaths, n, ldpath) {
1881 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = true;
1882 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = true;
1883 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = true;
1884 }
1885 }
1886
1887 if (!scan_l) xarraypush_str(ldpaths, "/lib");
1888 if (!scan_ul) xarraypush_str(ldpaths, "/usr/lib");
1889 if (!scan_ull) xarraypush_str(ldpaths, "/usr/local/lib");
1890}
1549 1891
1550/* scan /etc/ld.so.conf for paths */ 1892/* scan /etc/ld.so.conf for paths */
1551static void scanelf_ldpath(void) 1893static void scanelf_ldpath(void)
1552{ 1894{
1553 char scan_l, scan_ul, scan_ull; 1895 size_t n;
1554 int i = 0; 1896 const char *ldpath;
1555 1897
1556 if (!ldpaths[0]) 1898 array_for_each(ldpaths, n, ldpath)
1557 err("Unable to load any paths from ld.so.conf");
1558
1559 scan_l = scan_ul = scan_ull = 0;
1560
1561 while (ldpaths[i]) {
1562 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
1563 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
1564 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
1565 scanelf_dir(ldpaths[i]); 1899 scanelf_dir(ldpath);
1566 ++i;
1567 }
1568
1569 if (!scan_l) scanelf_dir("/lib");
1570 if (!scan_ul) scanelf_dir("/usr/lib");
1571 if (!scan_ull) scanelf_dir("/usr/local/lib");
1572} 1900}
1573 1901
1574/* scan env PATH for paths */ 1902/* scan env PATH for paths */
1575static void scanelf_envpath(void) 1903static void scanelf_envpath(void)
1576{ 1904{
1587 } 1915 }
1588 1916
1589 free(path); 1917 free(path);
1590} 1918}
1591 1919
1592
1593/* usage / invocation handling functions */ /* Free Flags: c d j u w C G H I J K P Q U W Y Z */ 1920/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1594#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DO:BhV" 1921#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZCBhV"
1595#define a_argument required_argument 1922#define a_argument required_argument
1596static struct option const long_opts[] = { 1923static struct option const long_opts[] = {
1597 {"path", no_argument, NULL, 'p'}, 1924 {"path", no_argument, NULL, 'p'},
1598 {"ldpath", no_argument, NULL, 'l'}, 1925 {"ldpath", no_argument, NULL, 'l'},
1926 {"use-ldpath",no_argument, NULL, 129},
1927 {"root", a_argument, NULL, 128},
1599 {"recursive", no_argument, NULL, 'R'}, 1928 {"recursive", no_argument, NULL, 'R'},
1600 {"mount", no_argument, NULL, 'm'}, 1929 {"mount", no_argument, NULL, 'm'},
1601 {"symlink", no_argument, NULL, 'y'}, 1930 {"symlink", no_argument, NULL, 'y'},
1602 {"archives", no_argument, NULL, 'A'}, 1931 {"archives", no_argument, NULL, 'A'},
1603 {"ldcache", no_argument, NULL, 'L'}, 1932 {"ldcache", no_argument, NULL, 'L'},
1617 {"gmatch", no_argument, NULL, 'g'}, 1946 {"gmatch", no_argument, NULL, 'g'},
1618 {"textrels", no_argument, NULL, 'T'}, 1947 {"textrels", no_argument, NULL, 'T'},
1619 {"etype", a_argument, NULL, 'E'}, 1948 {"etype", a_argument, NULL, 'E'},
1620 {"bits", a_argument, NULL, 'M'}, 1949 {"bits", a_argument, NULL, 'M'},
1621 {"endian", no_argument, NULL, 'D'}, 1950 {"endian", no_argument, NULL, 'D'},
1951 {"osabi", no_argument, NULL, 'I'},
1952 {"eabi", no_argument, NULL, 'Y'},
1622 {"perms", a_argument, NULL, 'O'}, 1953 {"perms", a_argument, NULL, 'O'},
1954 {"size", no_argument, NULL, 'Z'},
1623 {"all", no_argument, NULL, 'a'}, 1955 {"all", no_argument, NULL, 'a'},
1624 {"quiet", no_argument, NULL, 'q'}, 1956 {"quiet", no_argument, NULL, 'q'},
1625 {"verbose", no_argument, NULL, 'v'}, 1957 {"verbose", no_argument, NULL, 'v'},
1626 {"format", a_argument, NULL, 'F'}, 1958 {"format", a_argument, NULL, 'F'},
1627 {"from", a_argument, NULL, 'f'}, 1959 {"from", a_argument, NULL, 'f'},
1628 {"file", a_argument, NULL, 'o'}, 1960 {"file", a_argument, NULL, 'o'},
1961 {"nocolor", no_argument, NULL, 'C'},
1629 {"nobanner", no_argument, NULL, 'B'}, 1962 {"nobanner", no_argument, NULL, 'B'},
1630 {"help", no_argument, NULL, 'h'}, 1963 {"help", no_argument, NULL, 'h'},
1631 {"version", no_argument, NULL, 'V'}, 1964 {"version", no_argument, NULL, 'V'},
1632 {NULL, no_argument, NULL, 0x0} 1965 {NULL, no_argument, NULL, 0x0}
1633}; 1966};
1634 1967
1635static const char *opts_help[] = { 1968static const char * const opts_help[] = {
1636 "Scan all directories in PATH environment", 1969 "Scan all directories in PATH environment",
1637 "Scan all directories in /etc/ld.so.conf", 1970 "Scan all directories in /etc/ld.so.conf",
1971 "Use ld.so.conf to show full path (use with -r/-n)",
1972 "Root directory (use with -l or -p)",
1638 "Scan directories recursively", 1973 "Scan directories recursively",
1639 "Don't recursively cross mount points", 1974 "Don't recursively cross mount points",
1640 "Don't scan symlinks", 1975 "Don't scan symlinks",
1641 "Scan archives (.a files)", 1976 "Scan archives (.a files)",
1642 "Utilize ld.so.cache information (use with -r/-n)", 1977 "Utilize ld.so.cache to show full path (use with -r/-n)",
1643 "Try and 'fix' bad things (use with -r/-e)", 1978 "Try and 'fix' bad things (use with -r/-e)",
1644 "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n", 1979 "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
1645 "Print PaX markings", 1980 "Print PaX markings",
1646 "Print GNU_STACK/PT_LOAD markings", 1981 "Print GNU_STACK/PT_LOAD markings",
1647 "Print TEXTREL information", 1982 "Print TEXTREL information",
1651 "Print BIND information", 1986 "Print BIND information",
1652 "Print SONAME information", 1987 "Print SONAME information",
1653 "Find a specified symbol", 1988 "Find a specified symbol",
1654 "Find a specified section", 1989 "Find a specified section",
1655 "Find a specified library", 1990 "Find a specified library",
1656 "Use strncmp to match libraries. (use with -N)", 1991 "Use regex rather than string compare (with -s); specify twice for case insensitive",
1657 "Locate cause of TEXTREL", 1992 "Locate cause of TEXTREL",
1658 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1993 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1659 "Print only ELF files matching numeric bits", 1994 "Print only ELF files matching numeric bits",
1660 "Print Endianness", 1995 "Print Endianness",
1996 "Print OSABI",
1997 "Print EABI (EM_ARM Only)",
1661 "Print only ELF files matching octal permissions", 1998 "Print only ELF files matching octal permissions",
1662 "Print all scanned info (-x -e -t -r -b)\n", 1999 "Print ELF file size",
2000 "Print all useful/simple info\n",
1663 "Only output 'bad' things", 2001 "Only output 'bad' things",
1664 "Be verbose (can be specified more than once)", 2002 "Be verbose (can be specified more than once)",
1665 "Use specified format for output", 2003 "Use specified format for output",
1666 "Read input stream from a filename", 2004 "Read input stream from a filename",
1667 "Write output stream to a filename", 2005 "Write output stream to a filename",
2006 "Don't emit color in output",
1668 "Don't display the header", 2007 "Don't display the header",
1669 "Print this help and exit", 2008 "Print this help and exit",
1670 "Print version and exit", 2009 "Print version and exit",
1671 NULL 2010 NULL
1672}; 2011};
1676{ 2015{
1677 unsigned long i; 2016 unsigned long i;
1678 printf("* Scan ELF binaries for stuff\n\n" 2017 printf("* Scan ELF binaries for stuff\n\n"
1679 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0); 2018 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1680 printf("Options: -[%s]\n", PARSE_FLAGS); 2019 printf("Options: -[%s]\n", PARSE_FLAGS);
1681 for (i = 0; long_opts[i].name; ++i) 2020 for (i = 0; long_opts[i].name; ++i) {
2021 /* first output the short flag if it has one */
2022 if (long_opts[i].val > '~')
2023 printf(" ");
2024 else
2025 printf(" -%c, ", long_opts[i].val);
2026
2027 /* then the long flag */
1682 if (long_opts[i].has_arg == no_argument) 2028 if (long_opts[i].has_arg == no_argument)
1683 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 2029 printf("--%-14s", long_opts[i].name);
1684 long_opts[i].name, opts_help[i]);
1685 else 2030 else
1686 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 2031 printf("--%-7s <arg> ", long_opts[i].name);
1687 long_opts[i].name, opts_help[i]); 2032
2033 /* finally the help text */
2034 printf("* %s\n", opts_help[i]);
2035 }
1688 2036
1689 puts("\nFor more information, see the scanelf(1) manpage"); 2037 puts("\nFor more information, see the scanelf(1) manpage");
1690 exit(status); 2038 exit(status);
1691} 2039}
1692 2040
1702static int parseargs(int argc, char *argv[]) 2050static int parseargs(int argc, char *argv[])
1703{ 2051{
1704 int i; 2052 int i;
1705 const char *from_file = NULL; 2053 const char *from_file = NULL;
1706 int ret = 0; 2054 int ret = 0;
2055 char load_cache_config = 0;
1707 2056
1708 opterr = 0; 2057 opterr = 0;
1709 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 2058 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1710 switch (i) { 2059 switch (i) {
1711 2060
1719 case 'f': 2068 case 'f':
1720 if (from_file) warn("You prob don't want to specify -f twice"); 2069 if (from_file) warn("You prob don't want to specify -f twice");
1721 from_file = optarg; 2070 from_file = optarg;
1722 break; 2071 break;
1723 case 'E': 2072 case 'E':
1724 strncpy(match_etypes, optarg, sizeof(match_etypes)); 2073 match_etypes = optarg;
1725 break; 2074 break;
1726 case 'M': 2075 case 'M':
1727 match_bits = atoi(optarg); 2076 match_bits = atoi(optarg);
1728 if (match_bits == 0) { 2077 if (match_bits == 0) {
1729 if (strcmp(optarg, "ELFCLASS32") == 0) 2078 if (strcmp(optarg, "ELFCLASS32") == 0)
1731 if (strcmp(optarg, "ELFCLASS64") == 0) 2080 if (strcmp(optarg, "ELFCLASS64") == 0)
1732 match_bits = 64; 2081 match_bits = 64;
1733 } 2082 }
1734 break; 2083 break;
1735 case 'O': 2084 case 'O':
1736 if (sscanf(optarg, "%o", &match_perms) == (-1)) 2085 if (sscanf(optarg, "%o", &match_perms) == -1)
1737 match_bits = 0; 2086 match_bits = 0;
1738 break; 2087 break;
1739 case 'o': { 2088 case 'o': {
1740 if (freopen(optarg, "w", stdout) == NULL) 2089 if (freopen(optarg, "w", stdout) == NULL)
1741 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 2090 errp("Could not freopen(%s)", optarg);
1742 break; 2091 break;
1743 } 2092 }
1744 case 'k': 2093 case 'k':
1745 if (find_section) warn("You prob don't want to specify -k twice"); 2094 xarraypush_str(find_section_arr, optarg);
1746 find_section = optarg;
1747 break; 2095 break;
1748 case 's': { 2096 case 's': {
1749 if (find_sym) warn("You prob don't want to specify -s twice"); 2097 /* historically, this was comma delimited */
1750 find_sym = optarg; 2098 char *this_sym = strtok(optarg, ",");
1751 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1)); 2099 if (!this_sym) /* edge case: -s '' */
1752 sprintf(versioned_symname, "%s@", find_sym); 2100 xarraypush_str(find_sym_arr, "");
2101 while (this_sym) {
2102 xarraypush_str(find_sym_arr, this_sym);
2103 this_sym = strtok(NULL, ",");
2104 }
1753 break; 2105 break;
1754 } 2106 }
1755 case 'N': { 2107 case 'N':
1756 if (find_lib) warn("You prob don't want to specify -N twice"); 2108 xarraypush_str(find_lib_arr, optarg);
1757 find_lib = optarg;
1758 break; 2109 break;
1759 }
1760
1761 case 'F': { 2110 case 'F': {
1762 if (out_format) warn("You prob don't want to specify -F twice"); 2111 if (out_format) warn("You prob don't want to specify -F twice");
1763 out_format = optarg; 2112 out_format = optarg;
1764 break; 2113 break;
1765 } 2114 }
1766 case 'z': { 2115 case 'z': {
1767 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 2116 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1768 size_t x; 2117 size_t x;
1769 2118
1770 for (x = 0 ; x < strlen(optarg); x++) { 2119 for (x = 0; x < strlen(optarg); x++) {
1771 switch(optarg[x]) { 2120 switch (optarg[x]) {
1772 case 'p': 2121 case 'p':
1773 case 'P': 2122 case 'P':
1774 do_pax_state(optarg[x], PAGEEXEC); 2123 do_pax_state(optarg[x], PAGEEXEC);
1775 break; 2124 break;
1776 case 's': 2125 case 's':
1804 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 2153 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1805 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 2154 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1806 setpax = flags; 2155 setpax = flags;
1807 break; 2156 break;
1808 } 2157 }
2158 case 'Z': show_size = 1; break;
1809 case 'g': g_match = 1; break; 2159 case 'g': ++g_match; break;
1810 case 'L': use_ldcache = 1; break; 2160 case 'L': load_cache_config = use_ldcache = 1; break;
1811 case 'y': scan_symlink = 0; break; 2161 case 'y': scan_symlink = 0; break;
1812 case 'A': scan_archives = 1; break; 2162 case 'A': scan_archives = 1; break;
2163 case 'C': color_init(true); break;
1813 case 'B': show_banner = 0; break; 2164 case 'B': show_banner = 0; break;
1814 case 'l': scan_ldpath = 1; break; 2165 case 'l': load_cache_config = scan_ldpath = 1; break;
1815 case 'p': scan_envpath = 1; break; 2166 case 'p': scan_envpath = 1; break;
1816 case 'R': dir_recurse = 1; break; 2167 case 'R': dir_recurse = 1; break;
1817 case 'm': dir_crossmount = 0; break; 2168 case 'm': dir_crossmount = 0; break;
1818 case 'X': ++fix_elf; break; 2169 case 'X': ++fix_elf; break;
1819 case 'x': show_pax = 1; break; 2170 case 'x': show_pax = 1; break;
1827 case 'T': show_textrels = 1; break; 2178 case 'T': show_textrels = 1; break;
1828 case 'q': be_quiet = 1; break; 2179 case 'q': be_quiet = 1; break;
1829 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2180 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1830 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break; 2181 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1831 case 'D': show_endian = 1; break; 2182 case 'D': show_endian = 1; break;
2183 case 'I': show_osabi = 1; break;
2184 case 'Y': show_eabi = 1; break;
2185 case 128:
2186 root_fd = open(optarg, O_RDONLY|O_CLOEXEC);
2187 if (root_fd == -1)
2188 err("Could not open root: %s", optarg);
2189 break;
2190 case 129: load_cache_config = use_ldpath = 1; break;
1832 case ':': 2191 case ':':
1833 err("Option '%c' is missing parameter", optopt); 2192 err("Option '%c' is missing parameter", optopt);
1834 case '?': 2193 case '?':
1835 err("Unknown option '%c' or argument missing", optopt); 2194 err("Unknown option '%c' or argument missing", optopt);
1836 default: 2195 default:
1837 err("Unhandled option '%c'; please report this", i); 2196 err("Unhandled option '%c'; please report this", i);
1838 } 2197 }
1839 } 2198 }
1840 if (show_textrels && be_verbose) { 2199 if (show_textrels && be_verbose)
1841 if (which("objdump") != NULL) 2200 has_objdump = bin_in_path("objdump");
1842 has_objdump = 1; 2201 /* precompile all the regexes */
2202 if (g_match) {
2203 regex_t preg;
2204 const char *this_sym;
2205 size_t n;
2206 int flags = REG_EXTENDED | REG_NOSUB | (g_match > 1 ? REG_ICASE : 0);
2207
2208 array_for_each(find_sym_arr, n, this_sym) {
2209 /* see scanelf_match_symname for logic info */
2210 switch (this_sym[0]) {
2211 case '%':
2212 while (*(this_sym++))
2213 if (*this_sym == '%') {
2214 ++this_sym;
2215 break;
2216 }
2217 break;
2218 case '+':
2219 case '-':
2220 ++this_sym;
2221 break;
2222 }
2223 if (*this_sym == '*')
2224 ++this_sym;
2225
2226 ret = regcomp(&preg, this_sym, flags);
2227 if (ret) {
2228 char err[256];
2229 regerror(ret, &preg, err, sizeof(err));
2230 err("regcomp of %s failed: %s", this_sym, err);
2231 }
2232 xarraypush(find_sym_regex_arr, &preg, sizeof(preg));
1843 } 2233 }
2234 }
2235 /* flatten arrays for display */
2236 if (array_cnt(find_sym_arr))
2237 find_sym = array_flatten_str(find_sym_arr);
2238 if (array_cnt(find_lib_arr))
2239 find_lib = array_flatten_str(find_lib_arr);
2240 if (array_cnt(find_section_arr))
2241 find_section = array_flatten_str(find_section_arr);
1844 /* let the format option override all other options */ 2242 /* let the format option override all other options */
1845 if (out_format) { 2243 if (out_format) {
1846 show_pax = show_phdr = show_textrel = show_rpath = \ 2244 show_pax = show_phdr = show_textrel = show_rpath = \
1847 show_needed = show_interp = show_bind = show_soname = \ 2245 show_needed = show_interp = show_bind = show_soname = \
1848 show_textrels = show_perms = show_endian = 0; 2246 show_textrels = show_perms = show_endian = show_size = \
2247 show_osabi = show_eabi = 0;
1849 for (i = 0; out_format[i]; ++i) { 2248 for (i = 0; out_format[i]; ++i) {
1850 if (!IS_MODIFIER(out_format[i])) continue; 2249 if (!IS_MODIFIER(out_format[i])) continue;
1851 2250
1852 switch (out_format[++i]) { 2251 switch (out_format[++i]) {
1853 case '+': break; 2252 case '+': break;
1860 case 's': break; 2259 case 's': break;
1861 case 'N': break; 2260 case 'N': break;
1862 case 'o': break; 2261 case 'o': break;
1863 case 'a': break; 2262 case 'a': break;
1864 case 'M': break; 2263 case 'M': break;
2264 case 'Z': show_size = 1; break;
1865 case 'D': show_endian = 1; break; 2265 case 'D': show_endian = 1; break;
2266 case 'I': show_osabi = 1; break;
2267 case 'Y': show_eabi = 1; break;
1866 case 'O': show_perms = 1; break; 2268 case 'O': show_perms = 1; break;
1867 case 'x': show_pax = 1; break; 2269 case 'x': show_pax = 1; break;
1868 case 'e': show_phdr = 1; break; 2270 case 'e': show_phdr = 1; break;
1869 case 't': show_textrel = 1; break; 2271 case 't': show_textrel = 1; break;
1870 case 'r': show_rpath = 1; break; 2272 case 'r': show_rpath = 1; break;
1872 case 'i': show_interp = 1; break; 2274 case 'i': show_interp = 1; break;
1873 case 'b': show_bind = 1; break; 2275 case 'b': show_bind = 1; break;
1874 case 'S': show_soname = 1; break; 2276 case 'S': show_soname = 1; break;
1875 case 'T': show_textrels = 1; break; 2277 case 'T': show_textrels = 1; break;
1876 default: 2278 default:
1877 err("Invalid format specifier '%c' (byte %i)", 2279 err("invalid format specifier '%c' (byte %i)",
1878 out_format[i], i+1); 2280 out_format[i], i+1);
1879 } 2281 }
1880 } 2282 }
1881 2283
1882 /* construct our default format */ 2284 /* construct our default format */
1883 } else { 2285 } else {
1884 size_t fmt_len = 30; 2286 size_t fmt_len = 30;
1885 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2287 out_format = xmalloc(sizeof(char) * fmt_len);
2288 *out_format = '\0';
1886 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2289 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1887 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 2290 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1888 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len); 2291 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
2292 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
1889 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len); 2293 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
2294 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
2295 if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1890 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2296 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1891 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2297 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1892 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2298 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1893 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2299 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1894 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2300 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1901 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 2307 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1902 } 2308 }
1903 if (be_verbose > 2) printf("Format: %s\n", out_format); 2309 if (be_verbose > 2) printf("Format: %s\n", out_format);
1904 2310
1905 /* now lets actually do the scanning */ 2311 /* now lets actually do the scanning */
1906 if (scan_ldpath || use_ldcache) 2312 if (load_cache_config)
1907 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG); 2313 load_ld_cache_config(__PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1908 if (scan_ldpath) scanelf_ldpath(); 2314 if (scan_ldpath) scanelf_ldpath();
1909 if (scan_envpath) scanelf_envpath(); 2315 if (scan_envpath) scanelf_envpath();
1910 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath) 2316 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1911 from_file = "-"; 2317 from_file = "-";
1912 if (from_file) { 2318 if (from_file) {
1919 search_path = argv[optind++]; 2325 search_path = argv[optind++];
1920 ret = scanelf_dir(search_path); 2326 ret = scanelf_dir(search_path);
1921 } 2327 }
1922 2328
1923 /* clean up */ 2329 /* clean up */
1924 free(versioned_symname);
1925 for (i = 0; ldpaths[i]; ++i)
1926 free(ldpaths[i]); 2330 xarrayfree(ldpaths);
2331 xarrayfree(find_sym_arr);
2332 xarrayfree(find_lib_arr);
2333 xarrayfree(find_section_arr);
2334 free(find_sym);
2335 free(find_lib);
2336 free(find_section);
2337 {
2338 size_t n;
2339 regex_t *preg;
2340 array_for_each(find_sym_regex_arr, n, preg)
2341 regfree(preg);
2342 xarrayfree(find_sym_regex_arr);
2343 }
1927 2344
1928 if (ldcache != 0) 2345 if (ldcache != 0)
1929 munmap(ldcache, ldcache_size); 2346 munmap(ldcache, ldcache_size);
1930 return ret; 2347 return ret;
1931} 2348}
1964 return envvals; 2381 return envvals;
1965} 2382}
1966 2383
1967static void parseenv(void) 2384static void parseenv(void)
1968{ 2385{
2386 color_init(false);
1969 qa_textrels = get_split_env("QA_TEXTRELS"); 2387 qa_textrels = get_split_env("QA_TEXTRELS");
1970 qa_execstack = get_split_env("QA_EXECSTACK"); 2388 qa_execstack = get_split_env("QA_EXECSTACK");
1971 qa_wx_load = get_split_env("QA_WX_LOAD"); 2389 qa_wx_load = get_split_env("QA_WX_LOAD");
1972} 2390}
1973 2391
1978 free(qa_textrels); 2396 free(qa_textrels);
1979 free(qa_execstack); 2397 free(qa_execstack);
1980 free(qa_wx_load); 2398 free(qa_wx_load);
1981} 2399}
1982#endif 2400#endif
1983
1984 2401
1985int main(int argc, char *argv[]) 2402int main(int argc, char *argv[])
1986{ 2403{
1987 int ret; 2404 int ret;
1988 if (argc < 2) 2405 if (argc < 2)
1991 ret = parseargs(argc, argv); 2408 ret = parseargs(argc, argv);
1992 fclose(stdout); 2409 fclose(stdout);
1993#ifdef __PAX_UTILS_CLEANUP 2410#ifdef __PAX_UTILS_CLEANUP
1994 cleanup(); 2411 cleanup();
1995 warn("The calls to add/delete heap should be off:\n" 2412 warn("The calls to add/delete heap should be off:\n"
1996 "\t- 1 due to the out_buffer not being freed in scanelf_file()\n" 2413 "\t- 1 due to the out_buffer not being freed in scanelf_fileat()\n"
1997 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD"); 2414 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1998#endif 2415#endif
1999 return ret; 2416 return ret;
2000}
2001
2002
2003
2004/* utility funcs */
2005static char *xstrdup(const char *s)
2006{
2007 char *ret = strdup(s);
2008 if (!ret) err("Could not strdup(): %s", strerror(errno));
2009 return ret;
2010}
2011static void *xmalloc(size_t size)
2012{
2013 void *ret = malloc(size);
2014 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
2015 return ret;
2016}
2017static void *xrealloc(void *ptr, size_t size)
2018{
2019 void *ret = realloc(ptr, size);
2020 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
2021 return ret;
2022}
2023static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
2024{
2025 size_t new_len;
2026
2027 new_len = strlen(*dst) + strlen(src);
2028 if (*curr_len <= new_len) {
2029 *curr_len = new_len + (*curr_len / 2);
2030 *dst = realloc(*dst, *curr_len);
2031 if (!*dst)
2032 err("could not realloc() %li bytes", (unsigned long)*curr_len);
2033 }
2034
2035 if (n)
2036 strncat(*dst, src, n);
2037 else
2038 strcat(*dst, src);
2039}
2040static inline void xchrcat(char **dst, const char append, size_t *curr_len)
2041{
2042 static char my_app[2];
2043 my_app[0] = append;
2044 my_app[1] = '\0';
2045 xstrcat(dst, my_app, curr_len);
2046} 2417}
2047 2418
2048/* Match filename against entries in matchlist, return TRUE 2419/* Match filename against entries in matchlist, return TRUE
2049 * if the file is listed */ 2420 * if the file is listed */
2050static int file_matches_list(const char *filename, char **matchlist) 2421static int file_matches_list(const char *filename, char **matchlist)

Legend:
Removed from v.1.185  
changed lines
  Added in v.1.249

  ViewVC Help
Powered by ViewVC 1.1.20