/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.185 Revision 1.244
1/* 1/*
2 * Copyright 2003-2007 Gentoo Foundation 2 * Copyright 2003-2007 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 1.244 2012/04/29 06:21:36 vapier Exp $
5 * 5 *
6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10static const char rcsid[] = "$Id: scanelf.c,v 1.244 2012/04/29 06:21:36 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;
64static char *find_lib = NULL; 49static char *find_lib = NULL;
50static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
65static char *find_section = NULL; 51static char *find_section = NULL;
52static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
66static char *out_format = NULL; 53static char *out_format = NULL;
67static char *search_path = NULL; 54static char *search_path = NULL;
68static char fix_elf = 0; 55static char fix_elf = 0;
69static char g_match = 0; 56static char g_match = 0;
70static char use_ldcache = 0; 57static char use_ldcache = 0;
58static char use_ldpath = 0;
71 59
72static char **qa_textrels = NULL; 60static char **qa_textrels = NULL;
73static char **qa_execstack = NULL; 61static char **qa_execstack = NULL;
74static char **qa_wx_load = NULL; 62static char **qa_wx_load = NULL;
63static int root_fd = AT_FDCWD;
75 64
76int match_bits = 0; 65static int match_bits = 0;
77unsigned int match_perms = 0; 66static unsigned int match_perms = 0;
78caddr_t ldcache = 0; 67static void *ldcache = NULL;
79size_t ldcache_size = 0; 68static size_t ldcache_size = 0;
80unsigned long setpax = 0UL; 69static unsigned long setpax = 0UL;
81 70
82int has_objdump = 0; 71static 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 72
97/* find the path to a file by name */ 73/* find the path to a file by name */
98static char *which(const char *fname) 74static int bin_in_path(const char *fname)
99{ 75{
100 static char fullpath[BUFSIZ]; 76 char fullpath[__PAX_UTILS_PATH_MAX];
101 char *path, *p; 77 char *path, *p;
102 78
103 path = getenv("PATH"); 79 path = getenv("PATH");
104 if (!path) 80 if (!path)
105 return NULL; 81 return 0;
106 82
107 path = xstrdup(path);
108 while ((p = strrchr(path, ':')) != NULL) { 83 while ((p = strrchr(path, ':')) != NULL) {
109 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname); 84 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
110 *p = 0; 85 *p = 0;
111 if (access(fullpath, R_OK) != (-1)) { 86 if (access(fullpath, R_OK) != -1)
112 free(path); 87 return 1;
113 return (char *) fullpath;
114 } 88 }
115 } 89
116 free(path); 90 return 0;
91}
92
93static FILE *fopenat_r(int dir_fd, const char *path)
94{
95 int fd = openat(dir_fd, path, O_RDONLY|O_CLOEXEC);
96 if (fd == -1)
117 return NULL; 97 return NULL;
98 return fdopen(fd, "re");
99}
100
101static const char *root_rel_path(const char *path)
102{
103 /*
104 * openat() will ignore the dirfd if path starts with
105 * a /, so consume all of that noise
106 *
107 * XXX: we don't handle relative paths like ../ that
108 * break out of the --root option, but for now, just
109 * don't do that :P.
110 */
111 if (root_fd != AT_FDCWD) {
112 while (*path == '/')
113 ++path;
114 if (*path == '\0')
115 path = ".";
116 }
117
118 return path;
118} 119}
119 120
120/* 1 on failure. 0 otherwise */ 121/* 1 on failure. 0 otherwise */
121static int rematch(const char *regex, const char *match, int cflags) 122static int rematch(const char *regex, const char *match, int cflags)
122{ 123{
123 regex_t preg; 124 regex_t preg;
124 int ret; 125 int ret;
125 126
126 if ((match == NULL) || (regex == NULL)) 127 if ((match == NULL) || (regex == NULL))
127 return EXIT_FAILURE; 128 return EXIT_FAILURE;
128
129 129
130 if ((ret = regcomp(&preg, regex, cflags))) { 130 if ((ret = regcomp(&preg, regex, cflags))) {
131 char err[256]; 131 char err[256];
132 132
133 if (regerror(ret, &preg, err, sizeof(err))) 133 if (regerror(ret, &preg, err, sizeof(err)))
141 regfree(&preg); 141 regfree(&preg);
142 142
143 return ret; 143 return ret;
144} 144}
145 145
146/* sub-funcs for scanelf_file() */ 146/* sub-funcs for scanelf_fileat() */
147static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 147static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **str)
148{ 148{
149 /* find the best SHT_DYNSYM and SHT_STRTAB sections */ 149 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
150
151 /* debug sections */
152 void *symtab = elf_findsecbyname(elf, ".symtab");
153 void *strtab = elf_findsecbyname(elf, ".strtab");
154 /* runtime sections */
155 void *dynsym = elf_findsecbyname(elf, ".dynsym");
156 void *dynstr = elf_findsecbyname(elf, ".dynstr");
157
158 /*
159 * If the sections are marked NOBITS, then they don't exist, so we just
160 * skip them. This let's us work sanely with splitdebug ELFs (rather
161 * than spewing a lot of "corrupt ELF" messages later on). In malformed
162 * ELFs, the section might be wrongly set to NOBITS, but screw em.
163 */
150#define GET_SYMTABS(B) \ 164#define GET_SYMTABS(B) \
151 if (elf->elf_class == ELFCLASS ## B) { \ 165 if (elf->elf_class == ELFCLASS ## B) { \
152 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \ 166 Elf ## B ## _Shdr *esymtab = symtab; \
153 /* debug sections */ \ 167 Elf ## B ## _Shdr *estrtab = strtab; \
154 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \ 168 Elf ## B ## _Shdr *edynsym = dynsym; \
155 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \ 169 Elf ## B ## _Shdr *edynstr = dynstr; \
156 /* runtime sections */ \ 170 \
157 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \ 171 if (symtab && EGET(esymtab->sh_type) == SHT_NOBITS) \
158 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \ 172 symtab = NULL; \
173 if (dynsym && EGET(edynsym->sh_type) == SHT_NOBITS) \
174 dynsym = NULL; \
159 if (symtab && dynsym) { \ 175 if (symtab && dynsym) \
160 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 176 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
161 } else { \ 177 else \
162 *sym = (void*)(symtab ? symtab : dynsym); \ 178 *sym = symtab ? symtab : dynsym; \
163 } \ 179 \
180 if (strtab && EGET(estrtab->sh_type) == SHT_NOBITS) \
181 strtab = NULL; \
182 if (dynstr && EGET(edynstr->sh_type) == SHT_NOBITS) \
183 dynstr = NULL; \
164 if (strtab && dynstr) { \ 184 if (strtab && dynstr) \
165 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 185 *str = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
166 } else { \ 186 else \
167 *tab = (void*)(strtab ? strtab : dynstr); \ 187 *str = strtab ? strtab : dynstr; \
168 } \
169 } 188 }
170 GET_SYMTABS(32) 189 GET_SYMTABS(32)
171 GET_SYMTABS(64) 190 GET_SYMTABS(64)
191
192 if (*sym && *str)
193 return;
194
195 /*
196 * damn, they're really going to make us work for it huh?
197 * reconstruct the section header info out of the dynamic
198 * tags so we can see what symbols this guy uses at runtime.
199 */
200#define GET_SYMTABS_DT(B) \
201 if (elf->elf_class == ELFCLASS ## B) { \
202 size_t i; \
203 static Elf ## B ## _Shdr sym_shdr, str_shdr; \
204 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
205 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
206 Elf ## B ## _Addr vsym, vstr, vhash, vgnu_hash; \
207 Elf ## B ## _Dyn *dyn; \
208 Elf ## B ## _Off offset; \
209 \
210 /* lookup symbols used at runtime with DT_SYMTAB / DT_STRTAB */ \
211 vsym = vstr = vhash = vgnu_hash = 0; \
212 memset(&sym_shdr, 0, sizeof(sym_shdr)); \
213 memset(&str_shdr, 0, sizeof(str_shdr)); \
214 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
215 if (EGET(phdr[i].p_type) != PT_DYNAMIC) \
216 continue; \
217 \
218 offset = EGET(phdr[i].p_offset); \
219 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) \
220 continue; \
221 \
222 dyn = DYN ## B (elf->vdata + offset); \
223 while (EGET(dyn->d_tag) != DT_NULL) { \
224 switch (EGET(dyn->d_tag)) { \
225 case DT_SYMTAB: vsym = EGET(dyn->d_un.d_val); break; \
226 case DT_SYMENT: sym_shdr.sh_entsize = dyn->d_un.d_val; break; \
227 case DT_STRTAB: vstr = EGET(dyn->d_un.d_val); break; \
228 case DT_STRSZ: str_shdr.sh_size = dyn->d_un.d_val; break; \
229 case DT_HASH: vhash = EGET(dyn->d_un.d_val); break; \
230 /*case DT_GNU_HASH: vgnu_hash = EGET(dyn->d_un.d_val); break;*/ \
231 } \
232 ++dyn; \
233 } \
234 if (vsym && vstr) \
235 break; \
236 } \
237 if (!vsym || !vstr || !(vhash || vgnu_hash)) \
238 return; \
239 \
240 /* calc offset into the ELF by finding the load addr of the syms */ \
241 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
242 Elf ## B ## _Addr vaddr = EGET(phdr[i].p_vaddr); \
243 Elf ## B ## _Addr filesz = EGET(phdr[i].p_filesz); \
244 offset = EGET(phdr[i].p_offset); \
245 \
246 if (EGET(phdr[i].p_type) != PT_LOAD) \
247 continue; \
248 \
249 if (vhash >= vaddr && vhash < vaddr + filesz) { \
250 /* Scan the hash table to see how many entries we have */ \
251 Elf32_Word max_sym_idx = 0; \
252 Elf32_Word *hashtbl = elf->vdata + offset + (vhash - vaddr); \
253 Elf32_Word b, nbuckets = EGET(hashtbl[0]); \
254 Elf32_Word nchains = EGET(hashtbl[1]); \
255 Elf32_Word *buckets = &hashtbl[2]; \
256 Elf32_Word *chains = &buckets[nbuckets]; \
257 Elf32_Word sym_idx; \
258 \
259 for (b = 0; b < nbuckets; ++b) { \
260 if (!buckets[b]) \
261 continue; \
262 for (sym_idx = buckets[b]; sym_idx < nchains && sym_idx; sym_idx = chains[sym_idx]) \
263 if (max_sym_idx < sym_idx) \
264 max_sym_idx = sym_idx; \
265 } \
266 ESET(sym_shdr.sh_size, sym_shdr.sh_entsize * max_sym_idx); \
267 } \
268 \
269 if (vsym >= vaddr && vsym < vaddr + filesz) { \
270 ESET(sym_shdr.sh_offset, offset + (vsym - vaddr)); \
271 *sym = &sym_shdr; \
272 } \
273 \
274 if (vstr >= vaddr && vstr < vaddr + filesz) { \
275 ESET(str_shdr.sh_offset, offset + (vstr - vaddr)); \
276 *str = &str_shdr; \
277 } \
278 } \
279 }
280 GET_SYMTABS_DT(32)
281 GET_SYMTABS_DT(64)
172} 282}
173 283
174static char *scanelf_file_pax(elfobj *elf, char *found_pax) 284static char *scanelf_file_pax(elfobj *elf, char *found_pax)
175{ 285{
176 static char ret[7]; 286 static char ret[7];
203 } 313 }
204 SHOW_PAX(32) 314 SHOW_PAX(32)
205 SHOW_PAX(64) 315 SHOW_PAX(64)
206 } 316 }
207 317
208 318 /* Note: We do not support setting EI_PAX if not PT_PAX_FLAGS
209 if (fix_elf && setpax) { 319 * was found. This is known to break ELFs on glibc systems,
210 /* set the chpax settings */ 320 * and mainline PaX has deprecated use of this for a long time.
211 if (elf->elf_class == ELFCLASS32) { 321 * 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) 322 * seem like it's worth the effort. #411919
213 ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax)); 323 */
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 }
219 324
220 /* fall back to EI_PAX if no PT_PAX was found */ 325 /* fall back to EI_PAX if no PT_PAX was found */
221 if (!*ret) { 326 if (!*ret) {
222 static char *paxflags; 327 static char *paxflags;
223 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); 328 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
271 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 376 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
272 found = found_relro; \ 377 found = found_relro; \
273 offset = 4; \ 378 offset = 4; \
274 check_flags = PF_X; \ 379 check_flags = PF_X; \
275 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 380 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
276 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \ 381 if (EGET(ehdr->e_type) == ET_DYN || EGET(ehdr->e_type) == ET_EXEC) \
277 if (multi_load++ > max_pt_load) \ 382 if (multi_load++ > max_pt_load) \
278 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \ 383 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
279 if (file_matches_list(elf->filename, qa_wx_load)) \ 384 if (file_matches_list(elf->filename, qa_wx_load)) \
280 continue; \ 385 continue; \
281 found = found_load; \ 386 found = found_load; \
298 } else if (elf->shdr != NULL) { \ 403 } else if (elf->shdr != NULL) { \
299 /* no program headers which means this is prob an object file */ \ 404 /* no program headers which means this is prob an object file */ \
300 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 405 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
301 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 406 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
302 char *str; \ 407 char *str; \
303 if ((void*)strtbl > (void*)elf->data_end) \ 408 if ((void*)strtbl > elf->data_end) \
304 goto skip_this_shdr##B; \ 409 goto skip_this_shdr##B; \
305 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 410 check_flags = SHF_WRITE|SHF_EXECINSTR; \
306 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 411 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
307 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 412 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
308 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 413 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
339 return NULL; 444 return NULL;
340 else 445 else
341 return ret; 446 return ret;
342} 447}
343 448
449/*
450 * See if this ELF contains a DT_TEXTREL tag in any of its
451 * PT_DYNAMIC sections.
452 */
344static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 453static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
345{ 454{
346 static const char *ret = "TEXTREL"; 455 static const char *ret = "TEXTREL";
347 unsigned long i; 456 unsigned long i;
348 457
359 Elf ## B ## _Off offset; \ 468 Elf ## B ## _Off offset; \
360 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 469 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; \ 470 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
362 offset = EGET(phdr[i].p_offset); \ 471 offset = EGET(phdr[i].p_offset); \
363 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 472 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
364 dyn = DYN ## B (elf->data + offset); \ 473 dyn = DYN ## B (elf->vdata + offset); \
365 while (EGET(dyn->d_tag) != DT_NULL) { \ 474 while (EGET(dyn->d_tag) != DT_NULL) { \
366 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 475 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
367 *found_textrel = 1; \ 476 *found_textrel = 1; \
368 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 477 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
369 return (be_wewy_wewy_quiet ? NULL : ret); \ 478 return (be_wewy_wewy_quiet ? NULL : ret); \
379 return NULL; 488 return NULL;
380 else 489 else
381 return " - "; 490 return " - ";
382} 491}
383 492
493/*
494 * Scan the .text section to see if there are any relocations in it.
495 * Should rewrite this to check PT_LOAD sections that are marked
496 * Executable rather than the section named '.text'.
497 */
384static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) 498static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
385{ 499{
386 unsigned long s, r, rmax; 500 unsigned long s, r, rmax;
387 void *symtab_void, *strtab_void, *text_void; 501 void *symtab_void, *strtab_void, *text_void;
388 502
409 Elf ## B ## _Rela *rela; \ 523 Elf ## B ## _Rela *rela; \
410 /* search the section headers for relocations */ \ 524 /* search the section headers for relocations */ \
411 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 525 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
412 uint32_t sh_type = EGET(shdr[s].sh_type); \ 526 uint32_t sh_type = EGET(shdr[s].sh_type); \
413 if (sh_type == SHT_REL) { \ 527 if (sh_type == SHT_REL) { \
414 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 528 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
415 rela = NULL; \ 529 rela = NULL; \
416 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 530 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
417 } else if (sh_type == SHT_RELA) { \ 531 } else if (sh_type == SHT_RELA) { \
418 rel = NULL; \ 532 rel = NULL; \
419 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 533 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
420 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 534 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
421 } else \ 535 } else \
422 continue; \ 536 continue; \
423 /* now see if any of the relocs are in the .text */ \ 537 /* now see if any of the relocs are in the .text */ \
424 for (r = 0; r < rmax; ++r) { \ 538 for (r = 0; r < rmax; ++r) { \
439 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 553 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
440 if (be_verbose <= 2) continue; \ 554 if (be_verbose <= 2) continue; \
441 } else \ 555 } else \
442 *found_textrels = 1; \ 556 *found_textrels = 1; \
443 /* locate this relocation symbol name */ \ 557 /* locate this relocation symbol name */ \
444 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 558 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
445 if ((void*)sym > (void*)elf->data_end) { \ 559 if ((void*)sym > elf->data_end) { \
446 warn("%s: corrupt ELF symbol", elf->filename); \ 560 warn("%s: corrupt ELF symbol", elf->filename); \
447 continue; \ 561 continue; \
448 } \ 562 } \
449 sym_max = ELF ## B ## _R_SYM(r_info); \ 563 sym_max = ELF ## B ## _R_SYM(r_info); \
450 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 564 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
453 sym = NULL; \ 567 sym = NULL; \
454 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 568 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
455 /* show the raw details about this reloc */ \ 569 /* show the raw details about this reloc */ \
456 printf(" %s: ", elf->base_filename); \ 570 printf(" %s: ", elf->base_filename); \
457 if (sym && sym->st_name) \ 571 if (sym && sym->st_name) \
458 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \ 572 printf("%s", elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
459 else \ 573 else \
460 printf("(memory/data?)"); \ 574 printf("(memory/data?)"); \
461 printf(" [0x%lX]", (unsigned long)r_offset); \ 575 printf(" [0x%lX]", (unsigned long)r_offset); \
462 /* now try to find the closest symbol that this rel is probably in */ \ 576 /* now try to find the closest symbol that this rel is probably in */ \
463 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 577 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
464 func = NULL; \ 578 func = NULL; \
465 offset_tmp = 0; \ 579 offset_tmp = 0; \
466 while (sym_max--) { \ 580 while (sym_max--) { \
467 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \ 581 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
468 func = sym; \ 582 func = sym; \
479 printf("%s", func_name); \ 593 printf("%s", func_name); \
480 } else \ 594 } else \
481 printf("(optimized out)"); \ 595 printf("(optimized out)"); \
482 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 596 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
483 if (be_verbose && has_objdump) { \ 597 if (be_verbose && has_objdump) { \
598 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
484 char *sysbuf; \ 599 char *sysbuf; \
485 size_t syslen; \ 600 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"; \ 601 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; \ 602 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
488 sysbuf = xmalloc(syslen); \ 603 sysbuf = xmalloc(syslen); \
489 if (sysbuf) { \
490 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
491 if (end_addr < r_offset) \ 604 if (end_addr < r_offset) \
492 /* not uncommon when things are optimized out */ \ 605 /* not uncommon when things are optimized out */ \
493 end_addr = r_offset + 0x100; \ 606 end_addr = r_offset + 0x100; \
494 snprintf(sysbuf, syslen, sysfmt, \ 607 snprintf(sysbuf, syslen, sysfmt, \
495 (unsigned long)offset_tmp, \ 608 (unsigned long)offset_tmp, \
496 (unsigned long)end_addr, \ 609 (unsigned long)end_addr, \
497 elf->filename, \ 610 elf->filename, \
498 (unsigned long)r_offset); \ 611 (unsigned long)r_offset); \
499 fflush(stdout); \ 612 fflush(stdout); \
500 system(sysbuf); \ 613 if (system(sysbuf)) /* don't care */; \
501 fflush(stdout); \ 614 fflush(stdout); \
502 free(sysbuf); \ 615 free(sysbuf); \
503 } \
504 } \ 616 } \
505 } \ 617 } \
506 } } 618 } }
507 SHOW_TEXTRELS(32) 619 SHOW_TEXTRELS(32)
508 SHOW_TEXTRELS(64) 620 SHOW_TEXTRELS(64)
511 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename); 623 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
512 624
513 return NULL; 625 return NULL;
514} 626}
515 627
516static void rpath_security_checks(elfobj *, char *, const char *);
517static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type) 628static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
518{ 629{
519 struct stat st; 630 struct stat st;
520 switch (*item) { 631 switch (*item) {
521 case '/': break; 632 case '/': break;
537 break; 648 break;
538 } 649 }
539} 650}
540static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) 651static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
541{ 652{
542 unsigned long i, s; 653 unsigned long i;
543 char *rpath, *runpath, **r; 654 char *rpath, *runpath, **r;
544 void *strtbl_void; 655 void *strtbl_void;
545 656
546 if (!show_rpath) return; 657 if (!show_rpath) return;
547 658
562 /* Just scan dynamic headers */ \ 673 /* Just scan dynamic headers */ \
563 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 674 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
564 offset = EGET(phdr[i].p_offset); \ 675 offset = EGET(phdr[i].p_offset); \
565 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 676 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
566 /* Just scan dynamic RPATH/RUNPATH headers */ \ 677 /* Just scan dynamic RPATH/RUNPATH headers */ \
567 dyn = DYN ## B (elf->data + offset); \ 678 dyn = DYN ## B (elf->vdata + offset); \
568 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 679 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
569 if (word == DT_RPATH) { \ 680 if (word == DT_RPATH) { \
570 r = &rpath; \ 681 r = &rpath; \
571 } else if (word == DT_RUNPATH) { \ 682 } else if (word == DT_RUNPATH) { \
572 r = &runpath; \ 683 r = &runpath; \
576 } \ 687 } \
577 /* Verify the memory is somewhat sane */ \ 688 /* Verify the memory is somewhat sane */ \
578 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 689 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
579 if (offset < (Elf ## B ## _Off)elf->len) { \ 690 if (offset < (Elf ## B ## _Off)elf->len) { \
580 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 691 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
581 *r = (char*)(elf->data + offset); \ 692 *r = elf->data + offset; \
582 /* cache the length in case we need to nuke this section later on */ \ 693 /* cache the length in case we need to nuke this section later on */ \
583 if (fix_elf) \ 694 if (fix_elf) \
584 offset = strlen(*r); \ 695 offset = strlen(*r); \
585 /* If quiet, don't output paths in ld.so.conf */ \ 696 /* If quiet, don't output paths in ld.so.conf */ \
586 if (be_quiet) { \ 697 if (be_quiet) { \
592 /* scan each path in : delimited list */ \ 703 /* scan each path in : delimited list */ \
593 while (start) { \ 704 while (start) { \
594 rpath_security_checks(elf, start, get_elfdtype(word)); \ 705 rpath_security_checks(elf, start, get_elfdtype(word)); \
595 end = strchr(start, ':'); \ 706 end = strchr(start, ':'); \
596 len = (end ? abs(end - start) : strlen(start)); \ 707 len = (end ? abs(end - start) : strlen(start)); \
597 if (use_ldcache) \ 708 if (use_ldcache) { \
598 for (s = 0; ldpaths[s]; ++s) \ 709 size_t n; \
710 const char *ldpath; \
711 array_for_each(ldpaths, n, ldpath) \
599 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 712 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
600 *r = end; \ 713 *r = end; \
601 /* corner case ... if RPATH reads "/usr/lib:", we want \ 714 /* corner case ... if RPATH reads "/usr/lib:", we want \
602 * to show ':' rather than '' */ \ 715 * to show ':' rather than '' */ \
603 if (end && end[1] != '\0') \ 716 if (end && end[1] != '\0') \
604 (*r)++; \ 717 (*r)++; \
605 break; \ 718 break; \
606 } \ 719 } \
720 } \
607 if (!*r || !end) \ 721 if (!*r || !end) \
608 break; \ 722 break; \
609 else \ 723 else \
610 start = start + len + 1; \ 724 start = start + len + 1; \
611 } \ 725 } \
696#define FLAG_S390_LIB64 0x0400 810#define FLAG_S390_LIB64 0x0400
697#define FLAG_POWERPC_LIB64 0x0500 811#define FLAG_POWERPC_LIB64 0x0500
698#define FLAG_MIPS64_LIBN32 0x0600 812#define FLAG_MIPS64_LIBN32 0x0600
699#define FLAG_MIPS64_LIBN64 0x0700 813#define FLAG_MIPS64_LIBN64 0x0700
700 814
701static char *lookup_cache_lib(elfobj *, char *);
702
703#if defined(__GLIBC__) || defined(__UCLIBC__) 815#if defined(__GLIBC__) || defined(__UCLIBC__)
704 816
705static char *lookup_cache_lib(elfobj *elf, char *fname) 817static char *lookup_cache_lib(elfobj *elf, const char *fname)
706{ 818{
707 int fd = 0; 819 int fd;
708 char *strs; 820 char *strs;
709 static char buf[__PAX_UTILS_PATH_MAX] = ""; 821 static char buf[__PAX_UTILS_PATH_MAX] = "";
710 const char *cachefile = "/etc/ld.so.cache"; 822 const char *cachefile = root_rel_path("/etc/ld.so.cache");
711 struct stat st; 823 struct stat st;
712 824
713 typedef struct { 825 typedef struct {
714 char magic[LDSO_CACHE_MAGIC_LEN]; 826 char magic[LDSO_CACHE_MAGIC_LEN];
715 char version[LDSO_CACHE_VER_LEN]; 827 char version[LDSO_CACHE_VER_LEN];
725 libentry_t *libent; 837 libentry_t *libent;
726 838
727 if (fname == NULL) 839 if (fname == NULL)
728 return NULL; 840 return NULL;
729 841
730 if (ldcache == 0) { 842 if (ldcache == NULL) {
731 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1) 843 if (fstatat(root_fd, cachefile, &st, 0))
844 return NULL;
845
846 fd = openat(root_fd, cachefile, O_RDONLY);
847 if (fd == -1)
732 return NULL; 848 return NULL;
733 849
734 /* cache these values so we only map/unmap the cache file once */ 850 /* cache these values so we only map/unmap the cache file once */
735 ldcache_size = st.st_size; 851 ldcache_size = st.st_size;
736 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 852 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
737
738 close(fd); 853 close(fd);
739 854
740 if (ldcache == (caddr_t)-1) { 855 if (ldcache == MAP_FAILED) {
741 ldcache = 0; 856 ldcache = NULL;
742 return NULL; 857 return NULL;
743 } 858 }
744 859
745 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN)) 860 if (memcmp(header->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN) ||
861 memcmp(header->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
862 {
863 munmap(ldcache, ldcache_size);
864 ldcache = NULL;
746 return NULL; 865 return NULL;
747 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
748 return NULL;
749 } 866 }
867 } else
868 header = ldcache;
750 869
751 header = (header_t *) ldcache;
752 libent = (libentry_t *) (ldcache + sizeof(header_t)); 870 libent = ldcache + sizeof(header_t);
753 strs = (char *) &libent[header->nlibs]; 871 strs = (char *) &libent[header->nlibs];
754 872
755 for (fd = 0; fd < header->nlibs; fd++) { 873 for (fd = 0; fd < header->nlibs; ++fd) {
756 /* this should be more fine grained, but for now we assume that 874 /* This should be more fine grained, but for now we assume that
757 * diff arches will not be cached together. and we ignore the 875 * diff arches will not be cached together, and we ignore the
758 * the different multilib mips cases. */ 876 * the different multilib mips cases.
877 */
759 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 878 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
760 continue; 879 continue;
761 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 880 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
762 continue; 881 continue;
763 882
764 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 883 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
765 continue; 884 continue;
885
886 /* Return first hit because that is how the ldso rolls */
766 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 887 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
888 break;
767 } 889 }
890
768 return buf; 891 return buf;
769} 892}
893
770#elif defined(__NetBSD__) 894#elif defined(__NetBSD__)
771static char *lookup_cache_lib(elfobj *elf, char *fname) 895static char *lookup_cache_lib(elfobj *elf, const char *fname)
772{ 896{
773 static char buf[__PAX_UTILS_PATH_MAX] = ""; 897 static char buf[__PAX_UTILS_PATH_MAX] = "";
774 static struct stat st; 898 static struct stat st;
775 899 size_t n;
776 char **ldpath; 900 char *ldpath;
777 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 901
902 array_for_each(ldpath, n, ldpath) {
778 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", *ldpath, fname) >= sizeof(buf)) 903 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 */ 904 continue; /* if the pathname is too long, or something went wrong, ignore */
780 905
781 if (stat(buf, &st) != 0) 906 if (stat(buf, &st) != 0)
782 continue; /* if the lib doesn't exist in *ldpath, look further */ 907 continue; /* if the lib doesn't exist in *ldpath, look further */
783 908
791 916
792 /* not found in any path */ 917 /* not found in any path */
793 return NULL; 918 return NULL;
794} 919}
795#else 920#else
921#ifdef __ELF__
796#warning Cache support not implemented for your target 922#warning Cache support not implemented for your target
923#endif
797static char *lookup_cache_lib(elfobj *elf, char *fname) 924static char *lookup_cache_lib(elfobj *elf, const char *fname)
798{ 925{
799 return NULL; 926 return NULL;
800} 927}
801#endif 928#endif
929
930static char *lookup_config_lib(elfobj *elf, char *fname)
931{
932 static char buf[__PAX_UTILS_PATH_MAX] = "";
933 const char *ldpath;
934 size_t n;
935
936 array_for_each(ldpaths, n, ldpath) {
937 snprintf(buf, sizeof(buf), "%s/%s", root_rel_path(ldpath), fname);
938 if (faccessat(root_fd, buf, F_OK, AT_SYMLINK_NOFOLLOW) == 0)
939 return buf;
940 }
941
942 return NULL;
943}
802 944
803static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len) 945static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
804{ 946{
805 unsigned long i; 947 unsigned long i;
806 char *needed; 948 char *needed;
807 void *strtbl_void; 949 void *strtbl_void;
808 char *p; 950 char *p;
809 951
952 /*
953 * -n -> op==0 -> print all
954 * -N -> op==1 -> print requested
955 */
810 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 956 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
957 return NULL;
811 958
812 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 959 strtbl_void = elf_findsecbyname(elf, ".dynstr");
813 960
814 if (elf->phdr && strtbl_void) { 961 if (elf->phdr && strtbl_void) {
815#define SHOW_NEEDED(B) \ 962#define SHOW_NEEDED(B) \
817 Elf ## B ## _Dyn *dyn; \ 964 Elf ## B ## _Dyn *dyn; \
818 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 965 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
819 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 966 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
820 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 967 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
821 Elf ## B ## _Off offset; \ 968 Elf ## B ## _Off offset; \
969 size_t matched = 0; \
970 /* Walk all the program headers to find the PT_DYNAMIC */ \
822 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 971 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; \ 972 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) \
973 continue; \
824 offset = EGET(phdr[i].p_offset); \ 974 offset = EGET(phdr[i].p_offset); \
825 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 975 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) \
976 continue; \
977 /* Walk all the dynamic tags to find NEEDED entries */ \
826 dyn = DYN ## B (elf->data + offset); \ 978 dyn = DYN ## B (elf->vdata + offset); \
827 while (EGET(dyn->d_tag) != DT_NULL) { \ 979 while (EGET(dyn->d_tag) != DT_NULL) { \
828 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 980 if (EGET(dyn->d_tag) == DT_NEEDED) { \
829 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 981 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
830 if (offset >= (Elf ## B ## _Off)elf->len) { \ 982 if (offset >= (Elf ## B ## _Off)elf->len) { \
831 ++dyn; \ 983 ++dyn; \
832 continue; \ 984 continue; \
833 } \ 985 } \
834 needed = (char*)(elf->data + offset); \ 986 needed = elf->data + offset; \
835 if (op == 0) { \ 987 if (op == 0) { \
988 /* -n -> print all entries */ \
836 if (!be_wewy_wewy_quiet) { \ 989 if (!be_wewy_wewy_quiet) { \
837 if (*found_needed) xchrcat(ret, ',', ret_len); \ 990 if (*found_needed) xchrcat(ret, ',', ret_len); \
838 if (use_ldcache) \ 991 if (use_ldpath) { \
992 if ((p = lookup_config_lib(elf, needed)) != NULL) \
993 needed = p; \
994 } else if (use_ldcache) { \
839 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 995 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
840 needed = p; \ 996 needed = p; \
997 } \
841 xstrcat(ret, needed, ret_len); \ 998 xstrcat(ret, needed, ret_len); \
842 } \ 999 } \
843 *found_needed = 1; \ 1000 *found_needed = 1; \
844 } else { \ 1001 } else { \
845 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \ 1002 /* -N -> print matching entries */ \
1003 size_t n; \
1004 const char *find_lib_name; \
1005 \
1006 array_for_each(find_lib_arr, n, find_lib_name) { \
1007 int invert = 1; \
1008 if (find_lib_name[0] == '!') \
1009 invert = 0, ++find_lib_name; \
1010 if (!strcmp(find_lib_name, needed) == invert) \
1011 ++matched; \
1012 } \
1013 \
1014 if (matched == array_cnt(find_lib_arr)) { \
846 *found_lib = 1; \ 1015 *found_lib = 1; \
847 return (be_wewy_wewy_quiet ? NULL : needed); \ 1016 return (be_wewy_wewy_quiet ? NULL : find_lib); \
848 } \ 1017 } \
849 } \ 1018 } \
850 } \ 1019 } \
851 ++dyn; \ 1020 ++dyn; \
852 } \ 1021 } \
897 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 1066 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; \ 1067 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
899 dynamic = 1; \ 1068 dynamic = 1; \
900 offset = EGET(phdr[i].p_offset); \ 1069 offset = EGET(phdr[i].p_offset); \
901 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 1070 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
902 dyn = DYN ## B (elf->data + offset); \ 1071 dyn = DYN ## B (elf->vdata + offset); \
903 while (EGET(dyn->d_tag) != DT_NULL) { \ 1072 while (EGET(dyn->d_tag) != DT_NULL) { \
904 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 1073 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
905 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \ 1074 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
906 { \ 1075 { \
907 if (be_quiet) return NULL; \ 1076 if (be_quiet) return NULL; \
920 /* don't output anything if quiet mode and the ELF is static or not setuid */ 1089 /* 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))))) { 1090 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
922 return NULL; 1091 return NULL;
923 } else { 1092 } else {
924 *found_bind = 1; 1093 *found_bind = 1;
925 return (char *) (dynamic ? "LAZY" : "STATIC"); 1094 return (char *)(dynamic ? "LAZY" : "STATIC");
926 } 1095 }
927} 1096}
928static char *scanelf_file_soname(elfobj *elf, char *found_soname) 1097static char *scanelf_file_soname(elfobj *elf, char *found_soname)
929{ 1098{
930 unsigned long i; 1099 unsigned long i;
942 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 1111 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
943 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 1112 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
944 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 1113 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
945 Elf ## B ## _Off offset; \ 1114 Elf ## B ## _Off offset; \
946 /* only look for soname in shared objects */ \ 1115 /* only look for soname in shared objects */ \
947 if (ehdr->e_type != ET_DYN) \ 1116 if (EGET(ehdr->e_type) != ET_DYN) \
948 return NULL; \ 1117 return NULL; \
949 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 1118 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; \ 1119 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
951 offset = EGET(phdr[i].p_offset); \ 1120 offset = EGET(phdr[i].p_offset); \
952 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 1121 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
953 dyn = DYN ## B (elf->data + offset); \ 1122 dyn = DYN ## B (elf->vdata + offset); \
954 while (EGET(dyn->d_tag) != DT_NULL) { \ 1123 while (EGET(dyn->d_tag) != DT_NULL) { \
955 if (EGET(dyn->d_tag) == DT_SONAME) { \ 1124 if (EGET(dyn->d_tag) == DT_SONAME) { \
956 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 1125 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
957 if (offset >= (Elf ## B ## _Off)elf->len) { \ 1126 if (offset >= (Elf ## B ## _Off)elf->len) { \
958 ++dyn; \ 1127 ++dyn; \
959 continue; \ 1128 continue; \
960 } \ 1129 } \
961 soname = (char*)(elf->data + offset); \ 1130 soname = elf->data + offset; \
962 *found_soname = 1; \ 1131 *found_soname = 1; \
963 return (be_wewy_wewy_quiet ? NULL : soname); \ 1132 return (be_wewy_wewy_quiet ? NULL : soname); \
964 } \ 1133 } \
965 ++dyn; \ 1134 ++dyn; \
966 } \ 1135 } \
970 } 1139 }
971 1140
972 return NULL; 1141 return NULL;
973} 1142}
974 1143
1144/*
1145 * We support the symbol form:
1146 * [%[modifiers]%][[+-]<symbol name>][,[.....]]
1147 * If the symbol name is empty, then all symbols are matched.
1148 * If the symbol name is a glob ("*"), then all symbols are dumped (debug).
1149 * Do not rely on this output format at all.
1150 * Otherwise the symbol name is used to search (either regex or string compare).
1151 * If the first char of the symbol name is a plus ("+"), then only match
1152 * defined symbols. If it's a minus ("-"), only match undefined symbols.
1153 * Putting modifiers in between the percent signs allows for more in depth
1154 * filters. There are groups of modifiers. If you don't specify a member
1155 * of a group, then all types in that group are matched. The current
1156 * groups and their types are:
1157 * STT group: STT_NOTYPE:n STT_OBJECT:o STT_FUNC:f STT_FILE:F
1158 * STB group: STB_LOCAL:l STB_GLOBAL:g STB_WEAK:w
1159 * SHN group: SHN_UNDEF:u SHN_ABS:a SHN_COMMON:c {defined}:d
1160 * The "defined" value in the SHN group does not correspond to a SHN_xxx define.
1161 * You can search for multiple symbols at once by seperating with a comma (",").
1162 *
1163 * Some examples:
1164 * ELFs with a weak function "foo":
1165 * scanelf -s %wf%foo <ELFs>
1166 * ELFs that define the symbol "main":
1167 * scanelf -s +main <ELFs>
1168 * scanelf -s %d%main <ELFs>
1169 * ELFs that refer to the undefined symbol "brk":
1170 * scanelf -s -brk <ELFs>
1171 * scanelf -s %u%brk <ELFs>
1172 * All global defined objects in an ELF:
1173 * scanelf -s %ogd% <ELF>
1174 */
1175static void
1176scanelf_match_symname(elfobj *elf, char *found_sym, char **ret, size_t *ret_len, const char *symname,
1177 unsigned int stt, unsigned int stb, unsigned int shn, unsigned long size)
1178{
1179 char *this_sym, *next_sym, saved = saved;
1180
1181 /* allow the user to specify a comma delimited list of symbols to search for */
1182 next_sym = NULL;
1183 do {
1184 bool inc_notype, inc_object, inc_func, inc_file,
1185 inc_local, inc_global, inc_weak,
1186 inc_def, inc_undef, inc_abs, inc_common;
1187
1188 if (next_sym) {
1189 next_sym[-1] = saved;
1190 this_sym = next_sym;
1191 } else
1192 this_sym = find_sym;
1193 if ((next_sym = strchr(this_sym, ','))) {
1194 /* make parsing easier by killing the comma temporarily */
1195 saved = *next_sym;
1196 *next_sym = '\0';
1197 next_sym += 1;
1198 }
1199
1200 /* symbol selection! */
1201 inc_notype = inc_object = inc_func = inc_file = \
1202 inc_local = inc_global = inc_weak = \
1203 inc_def = inc_undef = inc_abs = inc_common = \
1204 (*this_sym != '%');
1205
1206 /* parse the contents of %...% */
1207 if (!inc_notype) {
1208 while (*(this_sym++)) {
1209 if (*this_sym == '%') {
1210 ++this_sym;
1211 break;
1212 }
1213 switch (*this_sym) {
1214 case 'n': inc_notype = true; break;
1215 case 'o': inc_object = true; break;
1216 case 'f': inc_func = true; break;
1217 case 'F': inc_file = true; break;
1218 case 'l': inc_local = true; break;
1219 case 'g': inc_global = true; break;
1220 case 'w': inc_weak = true; break;
1221 case 'd': inc_def = true; break;
1222 case 'u': inc_undef = true; break;
1223 case 'a': inc_abs = true; break;
1224 case 'c': inc_common = true; break;
1225 default: err("invalid symbol selector '%c'", *this_sym);
1226 }
1227 }
1228
1229 /* If no types are matched, not match all */
1230 if (!inc_notype && !inc_object && !inc_func && !inc_file)
1231 inc_notype = inc_object = inc_func = inc_file = true;
1232 if (!inc_local && !inc_global && !inc_weak)
1233 inc_local = inc_global = inc_weak = true;
1234 if (!inc_def && !inc_undef && !inc_abs && !inc_common)
1235 inc_def = inc_undef = inc_abs = inc_common = true;
1236
1237 /* backwards compat for defined/undefined short hand */
1238 } else if (*this_sym == '+') {
1239 inc_undef = false;
1240 ++this_sym;
1241 } else if (*this_sym == '-') {
1242 inc_def = inc_abs = inc_common = false;
1243 ++this_sym;
1244 }
1245
1246 /* filter symbols */
1247 if ((!inc_notype && stt == STT_NOTYPE) || \
1248 (!inc_object && stt == STT_OBJECT) || \
1249 (!inc_func && stt == STT_FUNC ) || \
1250 (!inc_file && stt == STT_FILE ) || \
1251 (!inc_local && stb == STB_LOCAL ) || \
1252 (!inc_global && stb == STB_GLOBAL) || \
1253 (!inc_weak && stb == STB_WEAK ) || \
1254 (!inc_def && shn && shn < SHN_LORESERVE) || \
1255 (!inc_undef && shn == SHN_UNDEF ) || \
1256 (!inc_abs && shn == SHN_ABS ) || \
1257 (!inc_common && shn == SHN_COMMON))
1258 continue;
1259
1260 if (*this_sym == '*') {
1261 /* a "*" symbol gets you debug output */
1262 printf("%s(%s) %5lX %15s %15s %15s %s\n",
1263 ((*found_sym == 0) ? "\n\t" : "\t"),
1264 elf->base_filename,
1265 size,
1266 get_elfstttype(stt),
1267 get_elfstbtype(stb),
1268 get_elfshntype(shn),
1269 symname);
1270 goto matched;
1271
1272 } else {
1273 if (g_match) {
1274 /* regex match the symbol */
1275 if (rematch(this_sym, symname, REG_EXTENDED) != 0)
1276 continue;
1277
1278 } else if (*this_sym) {
1279 /* give empty symbols a "pass", else do a normal compare */
1280 const size_t len = strlen(this_sym);
1281 if (!(strncmp(this_sym, symname, len) == 0 &&
1282 /* Accept unversioned symbol names */
1283 (symname[len] == '\0' || symname[len] == '@')))
1284 continue;
1285 }
1286
1287 if (be_semi_verbose) {
1288 char buf[1024];
1289 snprintf(buf, sizeof(buf), "%lX %s %s",
1290 size,
1291 get_elfstttype(stt),
1292 this_sym);
1293 *ret = xstrdup(buf);
1294 } else {
1295 if (*ret) xchrcat(ret, ',', ret_len);
1296 xstrcat(ret, symname, ret_len);
1297 }
1298
1299 goto matched;
1300 }
1301 } while (next_sym);
1302
1303 return;
1304
1305 matched:
1306 *found_sym = 1;
1307 if (next_sym)
1308 next_sym[-1] = saved;
1309}
1310
975static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1311static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
976{ 1312{
977 unsigned long i;
978 char *ret; 1313 char *ret;
979 void *symtab_void, *strtab_void; 1314 void *symtab_void, *strtab_void;
980 1315
981 if (!find_sym) return NULL; 1316 if (!find_sym) return NULL;
982 ret = find_sym; 1317 ret = NULL;
983 1318
984 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1319 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
985 1320
986 if (symtab_void && strtab_void) { 1321 if (symtab_void && strtab_void) {
987#define FIND_SYM(B) \ 1322#define FIND_SYM(B) \
988 if (elf->elf_class == ELFCLASS ## B) { \ 1323 if (elf->elf_class == ELFCLASS ## B) { \
989 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1324 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
990 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1325 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
991 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 1326 Elf ## B ## _Sym *sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
992 unsigned long cnt = EGET(symtab->sh_entsize); \ 1327 Elf ## B ## _Word i, cnt = EGET(symtab->sh_entsize); \
993 char *symname; \ 1328 char *symname; \
1329 size_t ret_len = 0; \
994 if (cnt) \ 1330 if (cnt) \
995 cnt = EGET(symtab->sh_size) / cnt; \ 1331 cnt = EGET(symtab->sh_size) / cnt; \
996 for (i = 0; i < cnt; ++i) { \ 1332 for (i = 0; i < cnt; ++i) { \
1333 if ((void*)sym > elf->data_end) { \
1334 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1335 goto break_out; \
1336 } \
997 if (sym->st_name) { \ 1337 if (sym->st_name) { \
998 /* make sure the symbol name is in acceptable memory range */ \ 1338 /* make sure the symbol name is in acceptable memory range */ \
999 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1339 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
1000 if ((void*)symname > (void*)elf->data_end) { \ 1340 if ((void*)symname > elf->data_end) { \
1001 warnf("%s: corrupt ELF symbols", elf->filename); \ 1341 warnf("%s: corrupt ELF symbols", elf->filename); \
1002 ++sym; \ 1342 ++sym; \
1003 continue; \ 1343 continue; \
1004 } \ 1344 } \
1005 /* debug display ... show all symbols and some extra info */ \ 1345 scanelf_match_symname(elf, found_sym, \
1006 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \ 1346 &ret, &ret_len, symname, \
1007 printf("%s(%s) %5lX %15s %s %s\n", \ 1347 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
1008 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1348 ELF##B##_ST_BIND(EGET(sym->st_info)), \
1009 elf->base_filename, \ 1349 EGET(sym->st_shndx), \
1010 (unsigned long)sym->st_size, \ 1350 /* st_size can be 64bit, but no one is really that big, so screw em */ \
1011 get_elfstttype(sym->st_info), \ 1351 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 } \ 1352 } \
1053 ++sym; \ 1353 ++sym; \
1054 } } 1354 } \
1355 }
1055 FIND_SYM(32) 1356 FIND_SYM(32)
1056 FIND_SYM(64) 1357 FIND_SYM(64)
1057 } 1358 }
1058 1359
1059break_out: 1360break_out:
1062 if (*find_sym != '*' && *found_sym) 1363 if (*find_sym != '*' && *found_sym)
1063 return ret; 1364 return ret;
1064 if (be_quiet) 1365 if (be_quiet)
1065 return NULL; 1366 return NULL;
1066 else 1367 else
1067 return (char *)" - "; 1368 return " - ";
1068} 1369}
1069 1370
1070
1071static char *scanelf_file_sections(elfobj *elf, char *found_section) 1371static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1072{ 1372{
1073 if (!find_section) 1373 if (!find_section)
1074 return NULL; 1374 return NULL;
1075 1375
1076#define FIND_SECTION(B) \ 1376#define FIND_SECTION(B) \
1077 if (elf->elf_class == ELFCLASS ## B) { \ 1377 if (elf->elf_class == ELFCLASS ## B) { \
1378 size_t matched, n; \
1078 int invert; \ 1379 int invert; \
1380 const char *section_name; \
1079 Elf ## B ## _Shdr *section; \ 1381 Elf ## B ## _Shdr *section; \
1382 \
1383 matched = 0; \
1384 array_for_each(find_section_arr, n, section_name) { \
1080 invert = (*find_section == '!' ? 1 : 0); \ 1385 invert = (*section_name == '!' ? 1 : 0); \
1081 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1386 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1082 if ((section == NULL && invert) || (section != NULL && !invert)) \ 1387 if ((section == NULL && invert) || (section != NULL && !invert)) \
1388 ++matched; \
1389 } \
1390 \
1391 if (matched == array_cnt(find_section_arr)) \
1083 *found_section = 1; \ 1392 *found_section = 1; \
1084 } 1393 }
1085 FIND_SECTION(32) 1394 FIND_SECTION(32)
1086 FIND_SECTION(64) 1395 FIND_SECTION(64)
1087 1396
1092 return find_section; 1401 return find_section;
1093 1402
1094 if (be_quiet) 1403 if (be_quiet)
1095 return NULL; 1404 return NULL;
1096 else 1405 else
1097 return (char *)" - "; 1406 return " - ";
1098} 1407}
1099 1408
1100/* scan an elf file and show all the fun stuff */ 1409/* scan an elf file and show all the fun stuff */
1101#define prints(str) write(fileno(stdout), str, strlen(str)) 1410#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1102static int scanelf_elfobj(elfobj *elf) 1411static int scanelf_elfobj(elfobj *elf)
1103{ 1412{
1104 unsigned long i; 1413 unsigned long i;
1105 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1414 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1106 found_rpath, found_needed, found_interp, found_bind, found_soname, 1415 found_rpath, found_needed, found_interp, found_bind, found_soname,
1120 printf("%s: scanning file\n", elf->filename); 1429 printf("%s: scanning file\n", elf->filename);
1121 1430
1122 /* init output buffer */ 1431 /* init output buffer */
1123 if (!out_buffer) { 1432 if (!out_buffer) {
1124 out_len = sizeof(char) * 80; 1433 out_len = sizeof(char) * 80;
1125 out_buffer = (char*)xmalloc(out_len); 1434 out_buffer = xmalloc(out_len);
1126 } 1435 }
1127 *out_buffer = '\0'; 1436 *out_buffer = '\0';
1128 1437
1129 /* show the header */ 1438 /* show the header */
1130 if (!be_quiet && show_banner) { 1439 if (!be_quiet && show_banner) {
1142 case 'x': prints(" PAX "); break; 1451 case 'x': prints(" PAX "); break;
1143 case 'e': prints("STK/REL/PTL "); break; 1452 case 'e': prints("STK/REL/PTL "); break;
1144 case 't': prints("TEXTREL "); break; 1453 case 't': prints("TEXTREL "); break;
1145 case 'r': prints("RPATH "); break; 1454 case 'r': prints("RPATH "); break;
1146 case 'M': prints("CLASS "); break; 1455 case 'M': prints("CLASS "); break;
1456 case 'l':
1147 case 'n': prints("NEEDED "); break; 1457 case 'n': prints("NEEDED "); break;
1148 case 'i': prints("INTERP "); break; 1458 case 'i': prints("INTERP "); break;
1149 case 'b': prints("BIND "); break; 1459 case 'b': prints("BIND "); break;
1460 case 'Z': prints("SIZE "); break;
1150 case 'S': prints("SONAME "); break; 1461 case 'S': prints("SONAME "); break;
1151 case 's': prints("SYM "); break; 1462 case 's': prints("SYM "); break;
1152 case 'N': prints("LIB "); break; 1463 case 'N': prints("LIB "); break;
1153 case 'T': prints("TEXTRELS "); break; 1464 case 'T': prints("TEXTRELS "); break;
1154 case 'k': prints("SECTION "); break; 1465 case 'k': prints("SECTION "); break;
1155 case 'a': prints("ARCH "); break; 1466 case 'a': prints("ARCH "); break;
1467 case 'I': prints("OSABI "); break;
1468 case 'Y': prints("EABI "); break;
1156 case 'O': prints("PERM "); break; 1469 case 'O': prints("PERM "); break;
1157 case 'D': prints("ENDIAN "); break; 1470 case 'D': prints("ENDIAN "); break;
1158 default: warnf("'%c' has no title ?", out_format[i]); 1471 default: warnf("'%c' has no title ?", out_format[i]);
1159 } 1472 }
1160 } 1473 }
1166 1479
1167 /* dump all the good stuff */ 1480 /* dump all the good stuff */
1168 for (i = 0; out_format[i]; ++i) { 1481 for (i = 0; out_format[i]; ++i) {
1169 const char *out; 1482 const char *out;
1170 const char *tmp; 1483 const char *tmp;
1171 1484 static char ubuf[sizeof(unsigned long)*2];
1172 if (!IS_MODIFIER(out_format[i])) { 1485 if (!IS_MODIFIER(out_format[i])) {
1173 xchrcat(&out_buffer, out_format[i], &out_len); 1486 xchrcat(&out_buffer, out_format[i], &out_len);
1174 continue; 1487 continue;
1175 } 1488 }
1176 1489
1214 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1527 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1215 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break; 1528 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; 1529 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; 1530 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1218 case 'D': out = get_endian(elf); break; 1531 case 'D': out = get_endian(elf); break;
1219 case 'O': out = getstr_perms(elf->filename); break; 1532 case 'O': out = strfileperms(elf->filename); break;
1220 case 'n': 1533 case 'n':
1221 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; 1534 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; 1535 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1223 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1536 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1224 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1537 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1225 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1538 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1226 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1539 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1227 case 'a': out = get_elfemtype(elf); break; 1540 case 'a': out = get_elfemtype(elf); break;
1541 case 'I': out = get_elfosabi(elf); break;
1542 case 'Y': out = get_elf_eabi(elf); break;
1543 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]); 1544 default: warnf("'%c' has no scan code?", out_format[i]);
1229 } 1545 }
1230 if (out) { 1546 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); 1547 xstrcat(&out_buffer, out, &out_len);
1236 }
1237 } 1548 }
1238 1549
1239#define FOUND_SOMETHING() \ 1550#define FOUND_SOMETHING() \
1240 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1551 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1241 found_rpath || found_needed || found_interp || found_bind || \ 1552 found_rpath || found_needed || found_interp || found_bind || \
1260 elfobj *elf; 1571 elfobj *elf;
1261 1572
1262 /* verify this is real ELF */ 1573 /* verify this is real ELF */
1263 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) { 1574 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1264 if (be_verbose > 2) printf("%s: not an ELF\n", filename); 1575 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1265 return ret; 1576 return 2;
1266 } 1577 }
1267 switch (match_bits) { 1578 switch (match_bits) {
1268 case 32: 1579 case 32:
1269 if (elf->elf_class != ELFCLASS32) 1580 if (elf->elf_class != ELFCLASS32)
1270 goto label_done; 1581 goto label_done;
1273 if (elf->elf_class != ELFCLASS64) 1584 if (elf->elf_class != ELFCLASS64)
1274 goto label_done; 1585 goto label_done;
1275 break; 1586 break;
1276 default: break; 1587 default: break;
1277 } 1588 }
1278 if (strlen(match_etypes)) { 1589 if (match_etypes) {
1279 char sbuf[126]; 1590 char sbuf[126];
1280 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1591 strncpy(sbuf, match_etypes, sizeof(sbuf));
1281 if (strchr(match_etypes, ',') != NULL) { 1592 if (strchr(match_etypes, ',') != NULL) {
1282 char *p; 1593 char *p;
1283 while((p = strrchr(sbuf, ',')) != NULL) { 1594 while ((p = strrchr(sbuf, ',')) != NULL) {
1284 *p = 0; 1595 *p = 0;
1285 if (etype_lookup(p+1) == get_etype(elf)) 1596 if (etype_lookup(p+1) == get_etype(elf))
1286 goto label_ret; 1597 goto label_ret;
1287 } 1598 }
1288 } 1599 }
1308 1619
1309 ar = ar_open_fd(filename, fd); 1620 ar = ar_open_fd(filename, fd);
1310 if (ar == NULL) 1621 if (ar == NULL)
1311 return 1; 1622 return 1;
1312 1623
1313 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0); 1624 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) { 1625 while ((m = ar_next(ar)) != NULL) {
1626 off_t cur_pos = lseek(fd, 0, SEEK_CUR);
1627 if (cur_pos == -1)
1628 errp("lseek() failed");
1315 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size); 1629 elf = readelf_buffer(m->name, ar_buffer + cur_pos, m->size);
1316 if (elf) { 1630 if (elf) {
1317 scanelf_elfobj(elf); 1631 scanelf_elfobj(elf);
1318 unreadelf(elf); 1632 unreadelf(elf);
1319 } 1633 }
1320 } 1634 }
1321 munmap(ar_buffer, len); 1635 munmap(ar_buffer, len);
1322 1636
1323 return 0; 1637 return 0;
1324} 1638}
1325/* scan a file which may be an elf or an archive or some other magical beast */ 1639/* 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) 1640static int scanelf_fileat(int dir_fd, const char *filename, const struct stat *st_cache)
1327{ 1641{
1328 const struct stat *st = st_cache; 1642 const struct stat *st = st_cache;
1329 struct stat symlink_st; 1643 struct stat symlink_st;
1330 int fd; 1644 int fd;
1331 1645
1332 /* always handle regular files and handle symlinked files if no -y */ 1646 /* always handle regular files and handle symlinked files if no -y */
1333 if (S_ISLNK(st->st_mode)) { 1647 if (S_ISLNK(st->st_mode)) {
1334 if (!scan_symlink) return 1; 1648 if (!scan_symlink)
1649 return 1;
1335 stat(filename, &symlink_st); 1650 fstatat(dir_fd, filename, &symlink_st, 0);
1336 st = &symlink_st; 1651 st = &symlink_st;
1337 } 1652 }
1338 1653
1339 if (!S_ISREG(st->st_mode)) { 1654 if (!S_ISREG(st->st_mode)) {
1340 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1655 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1343 1658
1344 if (match_perms) { 1659 if (match_perms) {
1345 if ((st->st_mode | match_perms) != st->st_mode) 1660 if ((st->st_mode | match_perms) != st->st_mode)
1346 return 1; 1661 return 1;
1347 } 1662 }
1348 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1663 fd = openat(dir_fd, filename, (fix_elf ? O_RDWR : O_RDONLY) | O_CLOEXEC);
1664 if (fd == -1)
1349 return 1; 1665 return 1;
1350 1666
1351 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives) 1667 if (scanelf_elf(filename, fd, st->st_size) == 2) {
1352 /* if it isn't an ELF, maybe it's an .a archive */ 1668 /* if it isn't an ELF, maybe it's an .a archive */
1669 if (scan_archives)
1353 scanelf_archive(filename, fd, st->st_size); 1670 scanelf_archive(filename, fd, st->st_size);
1354 1671
1672 /*
1673 * unreadelf() implicitly closes its fd, so only close it
1674 * when we are returning it in the non-ELF case
1675 */
1355 close(fd); 1676 close(fd);
1677 }
1678
1356 return 0; 1679 return 0;
1357} 1680}
1358 1681
1359/* scan a directory for ET_EXEC files and print when we find one */ 1682/* scan a directory for ET_EXEC files and print when we find one */
1360static int scanelf_dir(const char *path) 1683static int scanelf_dirat(int dir_fd, const char *path)
1361{ 1684{
1362 register DIR *dir; 1685 register DIR *dir;
1363 register struct dirent *dentry; 1686 register struct dirent *dentry;
1364 struct stat st_top, st; 1687 struct stat st_top, st;
1365 char buf[__PAX_UTILS_PATH_MAX]; 1688 char buf[__PAX_UTILS_PATH_MAX], *subpath;
1366 size_t pathlen = 0, len = 0; 1689 size_t pathlen = 0, len = 0;
1367 int ret = 0; 1690 int ret = 0;
1691 int subdir_fd;
1368 1692
1369 /* make sure path exists */ 1693 /* make sure path exists */
1370 if (lstat(path, &st_top) == -1) { 1694 if (fstatat(dir_fd, path, &st_top, AT_SYMLINK_NOFOLLOW) == -1) {
1371 if (be_verbose > 2) printf("%s: does not exist\n", path); 1695 if (be_verbose > 2) printf("%s: does not exist\n", path);
1372 return 1; 1696 return 1;
1373 } 1697 }
1374 1698
1375 /* ok, if it isn't a directory, assume we can open it */ 1699 /* ok, if it isn't a directory, assume we can open it */
1376 if (!S_ISDIR(st_top.st_mode)) { 1700 if (!S_ISDIR(st_top.st_mode))
1377 return scanelf_file(path, &st_top); 1701 return scanelf_fileat(dir_fd, path, &st_top);
1378 }
1379 1702
1380 /* now scan the dir looking for fun stuff */ 1703 /* now scan the dir looking for fun stuff */
1381 if ((dir = opendir(path)) == NULL) { 1704 subdir_fd = openat(dir_fd, path, O_RDONLY|O_CLOEXEC);
1382 warnf("could not opendir %s: %s", path, strerror(errno)); 1705 if (subdir_fd == -1)
1706 dir = NULL;
1707 else
1708 dir = fdopendir(subdir_fd);
1709 if (dir == NULL) {
1710 if (subdir_fd != -1)
1711 close(subdir_fd);
1712 warnfp("could not opendir(%s)", path);
1383 return 1; 1713 return 1;
1384 } 1714 }
1385 if (be_verbose > 1) printf("%s: scanning dir\n", path); 1715 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1386 1716
1387 pathlen = strlen(path); 1717 subpath = stpcpy(buf, path);
1718 if (subpath[-1] != '/')
1719 *subpath++ = '/';
1720 pathlen = subpath - buf;
1388 while ((dentry = readdir(dir))) { 1721 while ((dentry = readdir(dir))) {
1389 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 1722 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
1390 continue; 1723 continue;
1724
1725 if (fstatat(subdir_fd, dentry->d_name, &st, AT_SYMLINK_NOFOLLOW) == -1)
1726 continue;
1727
1391 len = (pathlen + 1 + strlen(dentry->d_name) + 1); 1728 len = strlen(dentry->d_name);
1392 if (len >= sizeof(buf)) { 1729 if (len + pathlen + 1 >= sizeof(buf)) {
1393 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, 1730 warnf("Skipping '%s%s': len > sizeof(buf); %zu > %zu\n",
1394 (unsigned long)len, (unsigned long)sizeof(buf)); 1731 path, dentry->d_name, len + pathlen + 1, sizeof(buf));
1395 continue; 1732 continue;
1396 } 1733 }
1397 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name); 1734 memcpy(subpath, dentry->d_name, len);
1398 if (lstat(buf, &st) != -1) { 1735 subpath[len] = '\0';
1736
1399 if (S_ISREG(st.st_mode)) 1737 if (S_ISREG(st.st_mode))
1400 ret = scanelf_file(buf, &st); 1738 ret = scanelf_fileat(dir_fd, buf, &st);
1401 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1739 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1402 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1740 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1403 ret = scanelf_dir(buf); 1741 ret = scanelf_dirat(dir_fd, buf);
1404 }
1405 } 1742 }
1406 } 1743 }
1407 closedir(dir); 1744 closedir(dir);
1745
1408 return ret; 1746 return ret;
1409} 1747}
1748static int scanelf_dir(const char *path)
1749{
1750 return scanelf_dirat(root_fd, root_rel_path(path));
1751}
1410 1752
1411static int scanelf_from_file(const char *filename) 1753static int scanelf_from_file(const char *filename)
1412{ 1754{
1413 FILE *fp = NULL; 1755 FILE *fp;
1414 char *p; 1756 char *p, *path;
1415 char path[__PAX_UTILS_PATH_MAX]; 1757 size_t len;
1416 int ret = 0; 1758 int ret;
1417 1759
1418 if (strcmp(filename, "-") == 0) 1760 if (strcmp(filename, "-") == 0)
1419 fp = stdin; 1761 fp = stdin;
1420 else if ((fp = fopen(filename, "r")) == NULL) 1762 else if ((fp = fopen(filename, "r")) == NULL)
1421 return 1; 1763 return 1;
1422 1764
1423 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1765 path = NULL;
1766 len = 0;
1767 ret = 0;
1768 while (getline(&path, &len, fp) != -1) {
1424 if ((p = strchr(path, '\n')) != NULL) 1769 if ((p = strchr(path, '\n')) != NULL)
1425 *p = 0; 1770 *p = 0;
1426 search_path = path; 1771 search_path = path;
1427 ret = scanelf_dir(path); 1772 ret = scanelf_dir(path);
1428 } 1773 }
1774 free(path);
1775
1429 if (fp != stdin) 1776 if (fp != stdin)
1430 fclose(fp); 1777 fclose(fp);
1778
1431 return ret; 1779 return ret;
1432} 1780}
1433 1781
1434#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__) 1782#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1435 1783
1436static int load_ld_cache_config(int i, const char *fname) 1784static int _load_ld_cache_config(const char *fname)
1437{ 1785{
1438 FILE *fp = NULL; 1786 FILE *fp = NULL;
1439 char *p; 1787 char *p, *path;
1440 char path[__PAX_UTILS_PATH_MAX]; 1788 size_t len;
1789 int curr_fd = -1;
1441 1790
1442 if (i + 1 == ARRAY_SIZE(ldpaths)) 1791 fp = fopenat_r(root_fd, root_rel_path(fname));
1792 if (fp == NULL)
1443 return i; 1793 return -1;
1444 1794
1445 if ((fp = fopen(fname, "r")) == NULL) 1795 path = NULL;
1446 return i; 1796 len = 0;
1447 1797 while (getline(&path, &len, fp) != -1) {
1448 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1449 if ((p = strrchr(path, '\r')) != NULL) 1798 if ((p = strrchr(path, '\r')) != NULL)
1450 *p = 0; 1799 *p = 0;
1451 if ((p = strchr(path, '\n')) != NULL) 1800 if ((p = strchr(path, '\n')) != NULL)
1452 *p = 0; 1801 *p = 0;
1453#ifdef __linux__ 1802
1454 // recursive includes of the same file will make this segfault. 1803 /* recursive includes of the same file will make this segfault. */
1455 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1804 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1456 glob64_t gl; 1805 glob_t gl;
1457 size_t x; 1806 size_t x;
1458 char gpath[__PAX_UTILS_PATH_MAX]; 1807 const char *gpath;
1459 1808
1460 memset(gpath, 0, sizeof(gpath)); 1809 /* re-use existing path buffer ... need to be creative */
1461
1462 if (path[8] != '/') 1810 if (path[8] != '/')
1463 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1811 gpath = memcpy(path + 3, "/etc/", 5);
1464 else 1812 else
1465 strncpy(gpath, &path[8], sizeof(gpath)); 1813 gpath = path + 8;
1814 if (root_fd != AT_FDCWD) {
1815 if (curr_fd == -1) {
1816 curr_fd = open(".", O_RDONLY|O_CLOEXEC);
1817 if (fchdir(root_fd))
1818 errp("unable to change to root dir");
1819 }
1820 gpath = root_rel_path(gpath);
1821 }
1466 1822
1467 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1823 if (glob(gpath, 0, NULL, &gl) == 0) {
1468 for (x = 0; x < gl.gl_pathc; ++x) { 1824 for (x = 0; x < gl.gl_pathc; ++x) {
1469 /* try to avoid direct loops */ 1825 /* try to avoid direct loops */
1470 if (strcmp(gl.gl_pathv[x], fname) == 0) 1826 if (strcmp(gl.gl_pathv[x], fname) == 0)
1471 continue; 1827 continue;
1472 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1828 _load_ld_cache_config(gl.gl_pathv[x]);
1473 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1474 globfree64(&gl);
1475 return i;
1476 }
1477 } 1829 }
1478 globfree64 (&gl); 1830 globfree(&gl);
1479 continue;
1480 } 1831 }
1832
1833 /* failed globs are ignored by glibc */
1834 continue;
1481 } 1835 }
1482#endif 1836
1483 if (*path != '/') 1837 if (*path != '/')
1484 continue; 1838 continue;
1485 1839
1486 ldpaths[i++] = xstrdup(path); 1840 xarraypush_str(ldpaths, path);
1487
1488 if (i + 1 == ARRAY_SIZE(ldpaths))
1489 break;
1490 } 1841 }
1491 ldpaths[i] = NULL; 1842 free(path);
1492 1843
1493 fclose(fp); 1844 fclose(fp);
1845
1846 if (curr_fd != -1) {
1847 if (fchdir(curr_fd))
1848 /* don't care */;
1849 close(curr_fd);
1850 }
1851
1494 return i; 1852 return 0;
1495} 1853}
1496 1854
1497#elif defined(__FreeBSD__) || (__DragonFly__) 1855#elif defined(__FreeBSD__) || defined(__DragonFly__)
1498 1856
1499static int load_ld_cache_config(int i, const char *fname) 1857static int _load_ld_cache_config(const char *fname)
1500{ 1858{
1501 FILE *fp = NULL; 1859 FILE *fp = NULL;
1502 char *b = NULL, *p; 1860 char *b = NULL, *p;
1503 struct elfhints_hdr hdr; 1861 struct elfhints_hdr hdr;
1504 1862
1505 if (i + 1 == ARRAY_SIZE(ldpaths)) 1863 fp = fopenat_r(root_fd, root_rel_path(fname));
1864 if (fp == NULL)
1506 return i; 1865 return -1;
1507
1508 if ((fp = fopen(fname, "r")) == NULL)
1509 return i;
1510 1866
1511 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1867 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1512 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 || 1868 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1513 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1) 1869 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1514 { 1870 {
1515 fclose(fp); 1871 fclose(fp);
1516 return i; 1872 return -1;
1517 } 1873 }
1518 1874
1519 b = (char*)malloc(hdr.dirlistlen+1); 1875 b = xmalloc(hdr.dirlistlen + 1);
1520 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) { 1876 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1521 fclose(fp); 1877 fclose(fp);
1522 free(b); 1878 free(b);
1523 return i; 1879 return -1;
1524 } 1880 }
1525 1881
1526 while ((p = strsep(&b, ":"))) { 1882 while ((p = strsep(&b, ":"))) {
1527 if (*p == '\0') continue; 1883 if (*p == '\0')
1528 ldpaths[i++] = xstrdup(p); 1884 continue;
1529 1885 xarraypush_str(ldpaths, p);
1530 if (i + 1 == ARRAY_SIZE(ldpaths))
1531 break;
1532 } 1886 }
1533 ldpaths[i] = NULL;
1534 1887
1535 free(b); 1888 free(b);
1536 fclose(fp); 1889 fclose(fp);
1537 return i; 1890 return 0;
1538} 1891}
1539 1892
1540#else 1893#else
1541 1894#ifdef __ELF__
1542#warning Cache config support not implemented for your target 1895#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 1896#endif
1897static int _load_ld_cache_config(const char *fname)
1898{
1899 return 0;
1900}
1901#endif
1902
1903static void load_ld_cache_config(const char *fname)
1904{
1905 bool scan_l, scan_ul, scan_ull;
1906 size_t n;
1907 const char *ldpath;
1908
1909 _load_ld_cache_config(fname);
1910
1911 scan_l = scan_ul = scan_ull = false;
1912 if (array_cnt(ldpaths)) {
1913 array_for_each(ldpaths, n, ldpath) {
1914 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = true;
1915 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = true;
1916 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = true;
1917 }
1918 }
1919
1920 if (!scan_l) xarraypush_str(ldpaths, "/lib");
1921 if (!scan_ul) xarraypush_str(ldpaths, "/usr/lib");
1922 if (!scan_ull) xarraypush_str(ldpaths, "/usr/local/lib");
1923}
1549 1924
1550/* scan /etc/ld.so.conf for paths */ 1925/* scan /etc/ld.so.conf for paths */
1551static void scanelf_ldpath(void) 1926static void scanelf_ldpath(void)
1552{ 1927{
1553 char scan_l, scan_ul, scan_ull; 1928 size_t n;
1554 int i = 0; 1929 const char *ldpath;
1555 1930
1556 if (!ldpaths[0]) 1931 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]); 1932 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} 1933}
1573 1934
1574/* scan env PATH for paths */ 1935/* scan env PATH for paths */
1575static void scanelf_envpath(void) 1936static void scanelf_envpath(void)
1576{ 1937{
1587 } 1948 }
1588 1949
1589 free(path); 1950 free(path);
1590} 1951}
1591 1952
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 */ 1953/* 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" 1954#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZCBhV"
1595#define a_argument required_argument 1955#define a_argument required_argument
1596static struct option const long_opts[] = { 1956static struct option const long_opts[] = {
1597 {"path", no_argument, NULL, 'p'}, 1957 {"path", no_argument, NULL, 'p'},
1598 {"ldpath", no_argument, NULL, 'l'}, 1958 {"ldpath", no_argument, NULL, 'l'},
1959 {"use-ldpath",no_argument, NULL, 129},
1960 {"root", a_argument, NULL, 128},
1599 {"recursive", no_argument, NULL, 'R'}, 1961 {"recursive", no_argument, NULL, 'R'},
1600 {"mount", no_argument, NULL, 'm'}, 1962 {"mount", no_argument, NULL, 'm'},
1601 {"symlink", no_argument, NULL, 'y'}, 1963 {"symlink", no_argument, NULL, 'y'},
1602 {"archives", no_argument, NULL, 'A'}, 1964 {"archives", no_argument, NULL, 'A'},
1603 {"ldcache", no_argument, NULL, 'L'}, 1965 {"ldcache", no_argument, NULL, 'L'},
1617 {"gmatch", no_argument, NULL, 'g'}, 1979 {"gmatch", no_argument, NULL, 'g'},
1618 {"textrels", no_argument, NULL, 'T'}, 1980 {"textrels", no_argument, NULL, 'T'},
1619 {"etype", a_argument, NULL, 'E'}, 1981 {"etype", a_argument, NULL, 'E'},
1620 {"bits", a_argument, NULL, 'M'}, 1982 {"bits", a_argument, NULL, 'M'},
1621 {"endian", no_argument, NULL, 'D'}, 1983 {"endian", no_argument, NULL, 'D'},
1984 {"osabi", no_argument, NULL, 'I'},
1985 {"eabi", no_argument, NULL, 'Y'},
1622 {"perms", a_argument, NULL, 'O'}, 1986 {"perms", a_argument, NULL, 'O'},
1987 {"size", no_argument, NULL, 'Z'},
1623 {"all", no_argument, NULL, 'a'}, 1988 {"all", no_argument, NULL, 'a'},
1624 {"quiet", no_argument, NULL, 'q'}, 1989 {"quiet", no_argument, NULL, 'q'},
1625 {"verbose", no_argument, NULL, 'v'}, 1990 {"verbose", no_argument, NULL, 'v'},
1626 {"format", a_argument, NULL, 'F'}, 1991 {"format", a_argument, NULL, 'F'},
1627 {"from", a_argument, NULL, 'f'}, 1992 {"from", a_argument, NULL, 'f'},
1628 {"file", a_argument, NULL, 'o'}, 1993 {"file", a_argument, NULL, 'o'},
1994 {"nocolor", no_argument, NULL, 'C'},
1629 {"nobanner", no_argument, NULL, 'B'}, 1995 {"nobanner", no_argument, NULL, 'B'},
1630 {"help", no_argument, NULL, 'h'}, 1996 {"help", no_argument, NULL, 'h'},
1631 {"version", no_argument, NULL, 'V'}, 1997 {"version", no_argument, NULL, 'V'},
1632 {NULL, no_argument, NULL, 0x0} 1998 {NULL, no_argument, NULL, 0x0}
1633}; 1999};
1634 2000
1635static const char *opts_help[] = { 2001static const char * const opts_help[] = {
1636 "Scan all directories in PATH environment", 2002 "Scan all directories in PATH environment",
1637 "Scan all directories in /etc/ld.so.conf", 2003 "Scan all directories in /etc/ld.so.conf",
2004 "Use ld.so.conf to show full path (use with -r/-n)",
2005 "Root directory (use with -l or -p)",
1638 "Scan directories recursively", 2006 "Scan directories recursively",
1639 "Don't recursively cross mount points", 2007 "Don't recursively cross mount points",
1640 "Don't scan symlinks", 2008 "Don't scan symlinks",
1641 "Scan archives (.a files)", 2009 "Scan archives (.a files)",
1642 "Utilize ld.so.cache information (use with -r/-n)", 2010 "Utilize ld.so.cache to show full path (use with -r/-n)",
1643 "Try and 'fix' bad things (use with -r/-e)", 2011 "Try and 'fix' bad things (use with -r/-e)",
1644 "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n", 2012 "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
1645 "Print PaX markings", 2013 "Print PaX markings",
1646 "Print GNU_STACK/PT_LOAD markings", 2014 "Print GNU_STACK/PT_LOAD markings",
1647 "Print TEXTREL information", 2015 "Print TEXTREL information",
1651 "Print BIND information", 2019 "Print BIND information",
1652 "Print SONAME information", 2020 "Print SONAME information",
1653 "Find a specified symbol", 2021 "Find a specified symbol",
1654 "Find a specified section", 2022 "Find a specified section",
1655 "Find a specified library", 2023 "Find a specified library",
1656 "Use strncmp to match libraries. (use with -N)", 2024 "Use regex matching rather than string compare (use with -s)",
1657 "Locate cause of TEXTREL", 2025 "Locate cause of TEXTREL",
1658 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 2026 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1659 "Print only ELF files matching numeric bits", 2027 "Print only ELF files matching numeric bits",
1660 "Print Endianness", 2028 "Print Endianness",
2029 "Print OSABI",
2030 "Print EABI (EM_ARM Only)",
1661 "Print only ELF files matching octal permissions", 2031 "Print only ELF files matching octal permissions",
1662 "Print all scanned info (-x -e -t -r -b)\n", 2032 "Print ELF file size",
2033 "Print all useful/simple info\n",
1663 "Only output 'bad' things", 2034 "Only output 'bad' things",
1664 "Be verbose (can be specified more than once)", 2035 "Be verbose (can be specified more than once)",
1665 "Use specified format for output", 2036 "Use specified format for output",
1666 "Read input stream from a filename", 2037 "Read input stream from a filename",
1667 "Write output stream to a filename", 2038 "Write output stream to a filename",
2039 "Don't emit color in output",
1668 "Don't display the header", 2040 "Don't display the header",
1669 "Print this help and exit", 2041 "Print this help and exit",
1670 "Print version and exit", 2042 "Print version and exit",
1671 NULL 2043 NULL
1672}; 2044};
1676{ 2048{
1677 unsigned long i; 2049 unsigned long i;
1678 printf("* Scan ELF binaries for stuff\n\n" 2050 printf("* Scan ELF binaries for stuff\n\n"
1679 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0); 2051 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1680 printf("Options: -[%s]\n", PARSE_FLAGS); 2052 printf("Options: -[%s]\n", PARSE_FLAGS);
1681 for (i = 0; long_opts[i].name; ++i) 2053 for (i = 0; long_opts[i].name; ++i) {
2054 /* first output the short flag if it has one */
2055 if (long_opts[i].val > '~')
2056 printf(" ");
2057 else
2058 printf(" -%c, ", long_opts[i].val);
2059
2060 /* then the long flag */
1682 if (long_opts[i].has_arg == no_argument) 2061 if (long_opts[i].has_arg == no_argument)
1683 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 2062 printf("--%-14s", long_opts[i].name);
1684 long_opts[i].name, opts_help[i]);
1685 else 2063 else
1686 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 2064 printf("--%-7s <arg> ", long_opts[i].name);
1687 long_opts[i].name, opts_help[i]); 2065
2066 /* finally the help text */
2067 printf("* %s\n", opts_help[i]);
2068 }
1688 2069
1689 puts("\nFor more information, see the scanelf(1) manpage"); 2070 puts("\nFor more information, see the scanelf(1) manpage");
1690 exit(status); 2071 exit(status);
1691} 2072}
1692 2073
1702static int parseargs(int argc, char *argv[]) 2083static int parseargs(int argc, char *argv[])
1703{ 2084{
1704 int i; 2085 int i;
1705 const char *from_file = NULL; 2086 const char *from_file = NULL;
1706 int ret = 0; 2087 int ret = 0;
2088 char load_cache_config = 0;
1707 2089
1708 opterr = 0; 2090 opterr = 0;
1709 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 2091 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1710 switch (i) { 2092 switch (i) {
1711 2093
1719 case 'f': 2101 case 'f':
1720 if (from_file) warn("You prob don't want to specify -f twice"); 2102 if (from_file) warn("You prob don't want to specify -f twice");
1721 from_file = optarg; 2103 from_file = optarg;
1722 break; 2104 break;
1723 case 'E': 2105 case 'E':
1724 strncpy(match_etypes, optarg, sizeof(match_etypes)); 2106 match_etypes = optarg;
1725 break; 2107 break;
1726 case 'M': 2108 case 'M':
1727 match_bits = atoi(optarg); 2109 match_bits = atoi(optarg);
1728 if (match_bits == 0) { 2110 if (match_bits == 0) {
1729 if (strcmp(optarg, "ELFCLASS32") == 0) 2111 if (strcmp(optarg, "ELFCLASS32") == 0)
1731 if (strcmp(optarg, "ELFCLASS64") == 0) 2113 if (strcmp(optarg, "ELFCLASS64") == 0)
1732 match_bits = 64; 2114 match_bits = 64;
1733 } 2115 }
1734 break; 2116 break;
1735 case 'O': 2117 case 'O':
1736 if (sscanf(optarg, "%o", &match_perms) == (-1)) 2118 if (sscanf(optarg, "%o", &match_perms) == -1)
1737 match_bits = 0; 2119 match_bits = 0;
1738 break; 2120 break;
1739 case 'o': { 2121 case 'o': {
1740 if (freopen(optarg, "w", stdout) == NULL) 2122 if (freopen(optarg, "w", stdout) == NULL)
1741 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 2123 errp("Could not freopen(%s)", optarg);
1742 break; 2124 break;
1743 } 2125 }
1744 case 'k': 2126 case 'k':
1745 if (find_section) warn("You prob don't want to specify -k twice"); 2127 xarraypush_str(find_section_arr, optarg);
1746 find_section = optarg;
1747 break; 2128 break;
1748 case 's': { 2129 case 's': {
1749 if (find_sym) warn("You prob don't want to specify -s twice"); 2130 if (find_sym) warn("You prob don't want to specify -s twice");
1750 find_sym = optarg; 2131 find_sym = optarg;
1751 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1752 sprintf(versioned_symname, "%s@", find_sym);
1753 break; 2132 break;
1754 } 2133 }
1755 case 'N': { 2134 case 'N':
1756 if (find_lib) warn("You prob don't want to specify -N twice"); 2135 xarraypush_str(find_lib_arr, optarg);
1757 find_lib = optarg;
1758 break; 2136 break;
1759 }
1760
1761 case 'F': { 2137 case 'F': {
1762 if (out_format) warn("You prob don't want to specify -F twice"); 2138 if (out_format) warn("You prob don't want to specify -F twice");
1763 out_format = optarg; 2139 out_format = optarg;
1764 break; 2140 break;
1765 } 2141 }
1766 case 'z': { 2142 case 'z': {
1767 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 2143 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1768 size_t x; 2144 size_t x;
1769 2145
1770 for (x = 0 ; x < strlen(optarg); x++) { 2146 for (x = 0; x < strlen(optarg); x++) {
1771 switch(optarg[x]) { 2147 switch (optarg[x]) {
1772 case 'p': 2148 case 'p':
1773 case 'P': 2149 case 'P':
1774 do_pax_state(optarg[x], PAGEEXEC); 2150 do_pax_state(optarg[x], PAGEEXEC);
1775 break; 2151 break;
1776 case 's': 2152 case 's':
1804 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 2180 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1805 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 2181 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1806 setpax = flags; 2182 setpax = flags;
1807 break; 2183 break;
1808 } 2184 }
2185 case 'Z': show_size = 1; break;
1809 case 'g': g_match = 1; break; 2186 case 'g': g_match = 1; break;
1810 case 'L': use_ldcache = 1; break; 2187 case 'L': load_cache_config = use_ldcache = 1; break;
1811 case 'y': scan_symlink = 0; break; 2188 case 'y': scan_symlink = 0; break;
1812 case 'A': scan_archives = 1; break; 2189 case 'A': scan_archives = 1; break;
2190 case 'C': color_init(true); break;
1813 case 'B': show_banner = 0; break; 2191 case 'B': show_banner = 0; break;
1814 case 'l': scan_ldpath = 1; break; 2192 case 'l': load_cache_config = scan_ldpath = 1; break;
1815 case 'p': scan_envpath = 1; break; 2193 case 'p': scan_envpath = 1; break;
1816 case 'R': dir_recurse = 1; break; 2194 case 'R': dir_recurse = 1; break;
1817 case 'm': dir_crossmount = 0; break; 2195 case 'm': dir_crossmount = 0; break;
1818 case 'X': ++fix_elf; break; 2196 case 'X': ++fix_elf; break;
1819 case 'x': show_pax = 1; break; 2197 case 'x': show_pax = 1; break;
1827 case 'T': show_textrels = 1; break; 2205 case 'T': show_textrels = 1; break;
1828 case 'q': be_quiet = 1; break; 2206 case 'q': be_quiet = 1; break;
1829 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2207 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; 2208 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; 2209 case 'D': show_endian = 1; break;
2210 case 'I': show_osabi = 1; break;
2211 case 'Y': show_eabi = 1; break;
2212 case 128:
2213 root_fd = open(optarg, O_RDONLY|O_CLOEXEC);
2214 if (root_fd == -1)
2215 err("Could not open root: %s", optarg);
2216 break;
2217 case 129: load_cache_config = use_ldpath = 1; break;
1832 case ':': 2218 case ':':
1833 err("Option '%c' is missing parameter", optopt); 2219 err("Option '%c' is missing parameter", optopt);
1834 case '?': 2220 case '?':
1835 err("Unknown option '%c' or argument missing", optopt); 2221 err("Unknown option '%c' or argument missing", optopt);
1836 default: 2222 default:
1837 err("Unhandled option '%c'; please report this", i); 2223 err("Unhandled option '%c'; please report this", i);
1838 } 2224 }
1839 } 2225 }
1840 if (show_textrels && be_verbose) { 2226 if (show_textrels && be_verbose)
1841 if (which("objdump") != NULL) 2227 has_objdump = bin_in_path("objdump");
1842 has_objdump = 1; 2228 /* flatten arrays for display */
1843 } 2229 if (array_cnt(find_lib_arr))
2230 find_lib = array_flatten_str(find_lib_arr);
2231 if (array_cnt(find_section_arr))
2232 find_section = array_flatten_str(find_section_arr);
1844 /* let the format option override all other options */ 2233 /* let the format option override all other options */
1845 if (out_format) { 2234 if (out_format) {
1846 show_pax = show_phdr = show_textrel = show_rpath = \ 2235 show_pax = show_phdr = show_textrel = show_rpath = \
1847 show_needed = show_interp = show_bind = show_soname = \ 2236 show_needed = show_interp = show_bind = show_soname = \
1848 show_textrels = show_perms = show_endian = 0; 2237 show_textrels = show_perms = show_endian = show_size = \
2238 show_osabi = show_eabi = 0;
1849 for (i = 0; out_format[i]; ++i) { 2239 for (i = 0; out_format[i]; ++i) {
1850 if (!IS_MODIFIER(out_format[i])) continue; 2240 if (!IS_MODIFIER(out_format[i])) continue;
1851 2241
1852 switch (out_format[++i]) { 2242 switch (out_format[++i]) {
1853 case '+': break; 2243 case '+': break;
1860 case 's': break; 2250 case 's': break;
1861 case 'N': break; 2251 case 'N': break;
1862 case 'o': break; 2252 case 'o': break;
1863 case 'a': break; 2253 case 'a': break;
1864 case 'M': break; 2254 case 'M': break;
2255 case 'Z': show_size = 1; break;
1865 case 'D': show_endian = 1; break; 2256 case 'D': show_endian = 1; break;
2257 case 'I': show_osabi = 1; break;
2258 case 'Y': show_eabi = 1; break;
1866 case 'O': show_perms = 1; break; 2259 case 'O': show_perms = 1; break;
1867 case 'x': show_pax = 1; break; 2260 case 'x': show_pax = 1; break;
1868 case 'e': show_phdr = 1; break; 2261 case 'e': show_phdr = 1; break;
1869 case 't': show_textrel = 1; break; 2262 case 't': show_textrel = 1; break;
1870 case 'r': show_rpath = 1; break; 2263 case 'r': show_rpath = 1; break;
1872 case 'i': show_interp = 1; break; 2265 case 'i': show_interp = 1; break;
1873 case 'b': show_bind = 1; break; 2266 case 'b': show_bind = 1; break;
1874 case 'S': show_soname = 1; break; 2267 case 'S': show_soname = 1; break;
1875 case 'T': show_textrels = 1; break; 2268 case 'T': show_textrels = 1; break;
1876 default: 2269 default:
1877 err("Invalid format specifier '%c' (byte %i)", 2270 err("invalid format specifier '%c' (byte %i)",
1878 out_format[i], i+1); 2271 out_format[i], i+1);
1879 } 2272 }
1880 } 2273 }
1881 2274
1882 /* construct our default format */ 2275 /* construct our default format */
1883 } else { 2276 } else {
1884 size_t fmt_len = 30; 2277 size_t fmt_len = 30;
1885 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2278 out_format = xmalloc(sizeof(char) * fmt_len);
2279 *out_format = '\0';
1886 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2280 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1887 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 2281 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1888 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len); 2282 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
2283 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
1889 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len); 2284 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
2285 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
2286 if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1890 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2287 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1891 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2288 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1892 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2289 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1893 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2290 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1894 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2291 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1901 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 2298 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1902 } 2299 }
1903 if (be_verbose > 2) printf("Format: %s\n", out_format); 2300 if (be_verbose > 2) printf("Format: %s\n", out_format);
1904 2301
1905 /* now lets actually do the scanning */ 2302 /* now lets actually do the scanning */
1906 if (scan_ldpath || use_ldcache) 2303 if (load_cache_config)
1907 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG); 2304 load_ld_cache_config(__PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1908 if (scan_ldpath) scanelf_ldpath(); 2305 if (scan_ldpath) scanelf_ldpath();
1909 if (scan_envpath) scanelf_envpath(); 2306 if (scan_envpath) scanelf_envpath();
1910 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath) 2307 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1911 from_file = "-"; 2308 from_file = "-";
1912 if (from_file) { 2309 if (from_file) {
1919 search_path = argv[optind++]; 2316 search_path = argv[optind++];
1920 ret = scanelf_dir(search_path); 2317 ret = scanelf_dir(search_path);
1921 } 2318 }
1922 2319
1923 /* clean up */ 2320 /* clean up */
1924 free(versioned_symname);
1925 for (i = 0; ldpaths[i]; ++i)
1926 free(ldpaths[i]); 2321 xarrayfree(ldpaths);
2322 xarrayfree(find_lib_arr);
2323 xarrayfree(find_section_arr);
2324 free(find_lib);
2325 free(find_section);
1927 2326
1928 if (ldcache != 0) 2327 if (ldcache != 0)
1929 munmap(ldcache, ldcache_size); 2328 munmap(ldcache, ldcache_size);
1930 return ret; 2329 return ret;
1931} 2330}
1964 return envvals; 2363 return envvals;
1965} 2364}
1966 2365
1967static void parseenv(void) 2366static void parseenv(void)
1968{ 2367{
2368 color_init(false);
1969 qa_textrels = get_split_env("QA_TEXTRELS"); 2369 qa_textrels = get_split_env("QA_TEXTRELS");
1970 qa_execstack = get_split_env("QA_EXECSTACK"); 2370 qa_execstack = get_split_env("QA_EXECSTACK");
1971 qa_wx_load = get_split_env("QA_WX_LOAD"); 2371 qa_wx_load = get_split_env("QA_WX_LOAD");
1972} 2372}
1973 2373
1978 free(qa_textrels); 2378 free(qa_textrels);
1979 free(qa_execstack); 2379 free(qa_execstack);
1980 free(qa_wx_load); 2380 free(qa_wx_load);
1981} 2381}
1982#endif 2382#endif
1983
1984 2383
1985int main(int argc, char *argv[]) 2384int main(int argc, char *argv[])
1986{ 2385{
1987 int ret; 2386 int ret;
1988 if (argc < 2) 2387 if (argc < 2)
1991 ret = parseargs(argc, argv); 2390 ret = parseargs(argc, argv);
1992 fclose(stdout); 2391 fclose(stdout);
1993#ifdef __PAX_UTILS_CLEANUP 2392#ifdef __PAX_UTILS_CLEANUP
1994 cleanup(); 2393 cleanup();
1995 warn("The calls to add/delete heap should be off:\n" 2394 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" 2395 "\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"); 2396 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1998#endif 2397#endif
1999 return ret; 2398 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} 2399}
2047 2400
2048/* Match filename against entries in matchlist, return TRUE 2401/* Match filename against entries in matchlist, return TRUE
2049 * if the file is listed */ 2402 * if the file is listed */
2050static int file_matches_list(const char *filename, char **matchlist) 2403static int file_matches_list(const char *filename, char **matchlist)

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