/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.185 Revision 1.243
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 1.243 2012/04/29 05:41:14 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 1.243 2012/04/29 05:41:14 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
150#define GET_SYMTABS(B) \ 158#define GET_SYMTABS(B) \
151 if (elf->elf_class == ELFCLASS ## B) { \ 159 if (elf->elf_class == ELFCLASS ## B) { \
152 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
153 /* debug sections */ \
154 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
155 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
156 /* runtime sections */ \
157 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
158 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
159 if (symtab && dynsym) { \ 160 if (symtab && dynsym) { \
161 Elf ## B ## _Shdr *esymtab = symtab; \
162 Elf ## B ## _Shdr *edynsym = dynsym; \
160 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 163 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
161 } else { \ 164 } else \
162 *sym = (void*)(symtab ? symtab : dynsym); \ 165 *sym = symtab ? symtab : dynsym; \
163 } \
164 if (strtab && dynstr) { \ 166 if (strtab && dynstr) { \
167 Elf ## B ## _Shdr *estrtab = strtab; \
168 Elf ## B ## _Shdr *edynstr = dynstr; \
165 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 169 *str = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
166 } else { \ 170 } else \
167 *tab = (void*)(strtab ? strtab : dynstr); \ 171 *str = strtab ? strtab : dynstr; \
168 } \
169 } 172 }
170 GET_SYMTABS(32) 173 GET_SYMTABS(32)
171 GET_SYMTABS(64) 174 GET_SYMTABS(64)
175
176 if (*sym && *str)
177 return;
178
179 /*
180 * damn, they're really going to make us work for it huh?
181 * reconstruct the section header info out of the dynamic
182 * tags so we can see what symbols this guy uses at runtime.
183 */
184#define GET_SYMTABS_DT(B) \
185 if (elf->elf_class == ELFCLASS ## B) { \
186 size_t i; \
187 static Elf ## B ## _Shdr sym_shdr, str_shdr; \
188 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
189 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
190 Elf ## B ## _Addr vsym, vstr, vhash, vgnu_hash; \
191 Elf ## B ## _Dyn *dyn; \
192 Elf ## B ## _Off offset; \
193 \
194 /* lookup symbols used at runtime with DT_SYMTAB / DT_STRTAB */ \
195 vsym = vstr = vhash = vgnu_hash = 0; \
196 memset(&sym_shdr, 0, sizeof(sym_shdr)); \
197 memset(&str_shdr, 0, sizeof(str_shdr)); \
198 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
199 if (EGET(phdr[i].p_type) != PT_DYNAMIC) \
200 continue; \
201 \
202 offset = EGET(phdr[i].p_offset); \
203 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) \
204 continue; \
205 \
206 dyn = DYN ## B (elf->vdata + offset); \
207 while (EGET(dyn->d_tag) != DT_NULL) { \
208 switch (EGET(dyn->d_tag)) { \
209 case DT_SYMTAB: vsym = EGET(dyn->d_un.d_val); break; \
210 case DT_SYMENT: sym_shdr.sh_entsize = dyn->d_un.d_val; break; \
211 case DT_STRTAB: vstr = EGET(dyn->d_un.d_val); break; \
212 case DT_STRSZ: str_shdr.sh_size = dyn->d_un.d_val; break; \
213 case DT_HASH: vhash = EGET(dyn->d_un.d_val); break; \
214 /*case DT_GNU_HASH: vgnu_hash = EGET(dyn->d_un.d_val); break;*/ \
215 } \
216 ++dyn; \
217 } \
218 if (vsym && vstr) \
219 break; \
220 } \
221 if (!vsym || !vstr || !(vhash || vgnu_hash)) \
222 return; \
223 \
224 /* calc offset into the ELF by finding the load addr of the syms */ \
225 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
226 Elf ## B ## _Addr vaddr = EGET(phdr[i].p_vaddr); \
227 Elf ## B ## _Addr filesz = EGET(phdr[i].p_filesz); \
228 offset = EGET(phdr[i].p_offset); \
229 \
230 if (EGET(phdr[i].p_type) != PT_LOAD) \
231 continue; \
232 \
233 if (vhash >= vaddr && vhash < vaddr + filesz) { \
234 /* Scan the hash table to see how many entries we have */ \
235 Elf32_Word max_sym_idx = 0; \
236 Elf32_Word *hashtbl = elf->vdata + offset + (vhash - vaddr); \
237 Elf32_Word b, nbuckets = EGET(hashtbl[0]); \
238 Elf32_Word nchains = EGET(hashtbl[1]); \
239 Elf32_Word *buckets = &hashtbl[2]; \
240 Elf32_Word *chains = &buckets[nbuckets]; \
241 Elf32_Word sym_idx; \
242 \
243 for (b = 0; b < nbuckets; ++b) { \
244 if (!buckets[b]) \
245 continue; \
246 for (sym_idx = buckets[b]; sym_idx < nchains && sym_idx; sym_idx = chains[sym_idx]) \
247 if (max_sym_idx < sym_idx) \
248 max_sym_idx = sym_idx; \
249 } \
250 ESET(sym_shdr.sh_size, sym_shdr.sh_entsize * max_sym_idx); \
251 } \
252 \
253 if (vsym >= vaddr && vsym < vaddr + filesz) { \
254 ESET(sym_shdr.sh_offset, offset + (vsym - vaddr)); \
255 *sym = &sym_shdr; \
256 } \
257 \
258 if (vstr >= vaddr && vstr < vaddr + filesz) { \
259 ESET(str_shdr.sh_offset, offset + (vstr - vaddr)); \
260 *str = &str_shdr; \
261 } \
262 } \
263 }
264 GET_SYMTABS_DT(32)
265 GET_SYMTABS_DT(64)
172} 266}
173 267
174static char *scanelf_file_pax(elfobj *elf, char *found_pax) 268static char *scanelf_file_pax(elfobj *elf, char *found_pax)
175{ 269{
176 static char ret[7]; 270 static char ret[7];
203 } 297 }
204 SHOW_PAX(32) 298 SHOW_PAX(32)
205 SHOW_PAX(64) 299 SHOW_PAX(64)
206 } 300 }
207 301
208 302 /* Note: We do not support setting EI_PAX if not PT_PAX_FLAGS
209 if (fix_elf && setpax) { 303 * was found. This is known to break ELFs on glibc systems,
210 /* set the chpax settings */ 304 * and mainline PaX has deprecated use of this for a long time.
211 if (elf->elf_class == ELFCLASS32) { 305 * 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) 306 * seem like it's worth the effort. #411919
213 ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax)); 307 */
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 }
219 308
220 /* fall back to EI_PAX if no PT_PAX was found */ 309 /* fall back to EI_PAX if no PT_PAX was found */
221 if (!*ret) { 310 if (!*ret) {
222 static char *paxflags; 311 static char *paxflags;
223 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); 312 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
271 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 360 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
272 found = found_relro; \ 361 found = found_relro; \
273 offset = 4; \ 362 offset = 4; \
274 check_flags = PF_X; \ 363 check_flags = PF_X; \
275 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 364 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
276 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \ 365 if (EGET(ehdr->e_type) == ET_DYN || EGET(ehdr->e_type) == ET_EXEC) \
277 if (multi_load++ > max_pt_load) \ 366 if (multi_load++ > max_pt_load) \
278 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \ 367 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
279 if (file_matches_list(elf->filename, qa_wx_load)) \ 368 if (file_matches_list(elf->filename, qa_wx_load)) \
280 continue; \ 369 continue; \
281 found = found_load; \ 370 found = found_load; \
298 } else if (elf->shdr != NULL) { \ 387 } else if (elf->shdr != NULL) { \
299 /* no program headers which means this is prob an object file */ \ 388 /* no program headers which means this is prob an object file */ \
300 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 389 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
301 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 390 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
302 char *str; \ 391 char *str; \
303 if ((void*)strtbl > (void*)elf->data_end) \ 392 if ((void*)strtbl > elf->data_end) \
304 goto skip_this_shdr##B; \ 393 goto skip_this_shdr##B; \
305 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 394 check_flags = SHF_WRITE|SHF_EXECINSTR; \
306 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 395 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
307 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 396 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
308 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 397 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
339 return NULL; 428 return NULL;
340 else 429 else
341 return ret; 430 return ret;
342} 431}
343 432
433/*
434 * See if this ELF contains a DT_TEXTREL tag in any of its
435 * PT_DYNAMIC sections.
436 */
344static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 437static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
345{ 438{
346 static const char *ret = "TEXTREL"; 439 static const char *ret = "TEXTREL";
347 unsigned long i; 440 unsigned long i;
348 441
359 Elf ## B ## _Off offset; \ 452 Elf ## B ## _Off offset; \
360 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 453 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; \ 454 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
362 offset = EGET(phdr[i].p_offset); \ 455 offset = EGET(phdr[i].p_offset); \
363 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 456 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
364 dyn = DYN ## B (elf->data + offset); \ 457 dyn = DYN ## B (elf->vdata + offset); \
365 while (EGET(dyn->d_tag) != DT_NULL) { \ 458 while (EGET(dyn->d_tag) != DT_NULL) { \
366 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 459 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
367 *found_textrel = 1; \ 460 *found_textrel = 1; \
368 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 461 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
369 return (be_wewy_wewy_quiet ? NULL : ret); \ 462 return (be_wewy_wewy_quiet ? NULL : ret); \
379 return NULL; 472 return NULL;
380 else 473 else
381 return " - "; 474 return " - ";
382} 475}
383 476
477/*
478 * Scan the .text section to see if there are any relocations in it.
479 * Should rewrite this to check PT_LOAD sections that are marked
480 * Executable rather than the section named '.text'.
481 */
384static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) 482static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
385{ 483{
386 unsigned long s, r, rmax; 484 unsigned long s, r, rmax;
387 void *symtab_void, *strtab_void, *text_void; 485 void *symtab_void, *strtab_void, *text_void;
388 486
409 Elf ## B ## _Rela *rela; \ 507 Elf ## B ## _Rela *rela; \
410 /* search the section headers for relocations */ \ 508 /* search the section headers for relocations */ \
411 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 509 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
412 uint32_t sh_type = EGET(shdr[s].sh_type); \ 510 uint32_t sh_type = EGET(shdr[s].sh_type); \
413 if (sh_type == SHT_REL) { \ 511 if (sh_type == SHT_REL) { \
414 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 512 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
415 rela = NULL; \ 513 rela = NULL; \
416 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 514 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
417 } else if (sh_type == SHT_RELA) { \ 515 } else if (sh_type == SHT_RELA) { \
418 rel = NULL; \ 516 rel = NULL; \
419 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 517 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
420 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 518 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
421 } else \ 519 } else \
422 continue; \ 520 continue; \
423 /* now see if any of the relocs are in the .text */ \ 521 /* now see if any of the relocs are in the .text */ \
424 for (r = 0; r < rmax; ++r) { \ 522 for (r = 0; r < rmax; ++r) { \
439 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 537 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
440 if (be_verbose <= 2) continue; \ 538 if (be_verbose <= 2) continue; \
441 } else \ 539 } else \
442 *found_textrels = 1; \ 540 *found_textrels = 1; \
443 /* locate this relocation symbol name */ \ 541 /* locate this relocation symbol name */ \
444 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 542 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
445 if ((void*)sym > (void*)elf->data_end) { \ 543 if ((void*)sym > elf->data_end) { \
446 warn("%s: corrupt ELF symbol", elf->filename); \ 544 warn("%s: corrupt ELF symbol", elf->filename); \
447 continue; \ 545 continue; \
448 } \ 546 } \
449 sym_max = ELF ## B ## _R_SYM(r_info); \ 547 sym_max = ELF ## B ## _R_SYM(r_info); \
450 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 548 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
453 sym = NULL; \ 551 sym = NULL; \
454 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 552 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
455 /* show the raw details about this reloc */ \ 553 /* show the raw details about this reloc */ \
456 printf(" %s: ", elf->base_filename); \ 554 printf(" %s: ", elf->base_filename); \
457 if (sym && sym->st_name) \ 555 if (sym && sym->st_name) \
458 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \ 556 printf("%s", elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
459 else \ 557 else \
460 printf("(memory/data?)"); \ 558 printf("(memory/data?)"); \
461 printf(" [0x%lX]", (unsigned long)r_offset); \ 559 printf(" [0x%lX]", (unsigned long)r_offset); \
462 /* now try to find the closest symbol that this rel is probably in */ \ 560 /* now try to find the closest symbol that this rel is probably in */ \
463 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 561 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
464 func = NULL; \ 562 func = NULL; \
465 offset_tmp = 0; \ 563 offset_tmp = 0; \
466 while (sym_max--) { \ 564 while (sym_max--) { \
467 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \ 565 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
468 func = sym; \ 566 func = sym; \
479 printf("%s", func_name); \ 577 printf("%s", func_name); \
480 } else \ 578 } else \
481 printf("(optimized out)"); \ 579 printf("(optimized out)"); \
482 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 580 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
483 if (be_verbose && has_objdump) { \ 581 if (be_verbose && has_objdump) { \
582 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
484 char *sysbuf; \ 583 char *sysbuf; \
485 size_t syslen; \ 584 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"; \ 585 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; \ 586 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
488 sysbuf = xmalloc(syslen); \ 587 sysbuf = xmalloc(syslen); \
489 if (sysbuf) { \
490 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
491 if (end_addr < r_offset) \ 588 if (end_addr < r_offset) \
492 /* not uncommon when things are optimized out */ \ 589 /* not uncommon when things are optimized out */ \
493 end_addr = r_offset + 0x100; \ 590 end_addr = r_offset + 0x100; \
494 snprintf(sysbuf, syslen, sysfmt, \ 591 snprintf(sysbuf, syslen, sysfmt, \
495 (unsigned long)offset_tmp, \ 592 (unsigned long)offset_tmp, \
496 (unsigned long)end_addr, \ 593 (unsigned long)end_addr, \
497 elf->filename, \ 594 elf->filename, \
498 (unsigned long)r_offset); \ 595 (unsigned long)r_offset); \
499 fflush(stdout); \ 596 fflush(stdout); \
500 system(sysbuf); \ 597 if (system(sysbuf)) /* don't care */; \
501 fflush(stdout); \ 598 fflush(stdout); \
502 free(sysbuf); \ 599 free(sysbuf); \
503 } \
504 } \ 600 } \
505 } \ 601 } \
506 } } 602 } }
507 SHOW_TEXTRELS(32) 603 SHOW_TEXTRELS(32)
508 SHOW_TEXTRELS(64) 604 SHOW_TEXTRELS(64)
511 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename); 607 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
512 608
513 return NULL; 609 return NULL;
514} 610}
515 611
516static void rpath_security_checks(elfobj *, char *, const char *);
517static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type) 612static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
518{ 613{
519 struct stat st; 614 struct stat st;
520 switch (*item) { 615 switch (*item) {
521 case '/': break; 616 case '/': break;
537 break; 632 break;
538 } 633 }
539} 634}
540static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) 635static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
541{ 636{
542 unsigned long i, s; 637 unsigned long i;
543 char *rpath, *runpath, **r; 638 char *rpath, *runpath, **r;
544 void *strtbl_void; 639 void *strtbl_void;
545 640
546 if (!show_rpath) return; 641 if (!show_rpath) return;
547 642
562 /* Just scan dynamic headers */ \ 657 /* Just scan dynamic headers */ \
563 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 658 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
564 offset = EGET(phdr[i].p_offset); \ 659 offset = EGET(phdr[i].p_offset); \
565 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 660 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
566 /* Just scan dynamic RPATH/RUNPATH headers */ \ 661 /* Just scan dynamic RPATH/RUNPATH headers */ \
567 dyn = DYN ## B (elf->data + offset); \ 662 dyn = DYN ## B (elf->vdata + offset); \
568 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 663 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
569 if (word == DT_RPATH) { \ 664 if (word == DT_RPATH) { \
570 r = &rpath; \ 665 r = &rpath; \
571 } else if (word == DT_RUNPATH) { \ 666 } else if (word == DT_RUNPATH) { \
572 r = &runpath; \ 667 r = &runpath; \
576 } \ 671 } \
577 /* Verify the memory is somewhat sane */ \ 672 /* Verify the memory is somewhat sane */ \
578 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 673 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
579 if (offset < (Elf ## B ## _Off)elf->len) { \ 674 if (offset < (Elf ## B ## _Off)elf->len) { \
580 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 675 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
581 *r = (char*)(elf->data + offset); \ 676 *r = elf->data + offset; \
582 /* cache the length in case we need to nuke this section later on */ \ 677 /* cache the length in case we need to nuke this section later on */ \
583 if (fix_elf) \ 678 if (fix_elf) \
584 offset = strlen(*r); \ 679 offset = strlen(*r); \
585 /* If quiet, don't output paths in ld.so.conf */ \ 680 /* If quiet, don't output paths in ld.so.conf */ \
586 if (be_quiet) { \ 681 if (be_quiet) { \
592 /* scan each path in : delimited list */ \ 687 /* scan each path in : delimited list */ \
593 while (start) { \ 688 while (start) { \
594 rpath_security_checks(elf, start, get_elfdtype(word)); \ 689 rpath_security_checks(elf, start, get_elfdtype(word)); \
595 end = strchr(start, ':'); \ 690 end = strchr(start, ':'); \
596 len = (end ? abs(end - start) : strlen(start)); \ 691 len = (end ? abs(end - start) : strlen(start)); \
597 if (use_ldcache) \ 692 if (use_ldcache) { \
598 for (s = 0; ldpaths[s]; ++s) \ 693 size_t n; \
694 const char *ldpath; \
695 array_for_each(ldpaths, n, ldpath) \
599 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 696 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
600 *r = end; \ 697 *r = end; \
601 /* corner case ... if RPATH reads "/usr/lib:", we want \ 698 /* corner case ... if RPATH reads "/usr/lib:", we want \
602 * to show ':' rather than '' */ \ 699 * to show ':' rather than '' */ \
603 if (end && end[1] != '\0') \ 700 if (end && end[1] != '\0') \
604 (*r)++; \ 701 (*r)++; \
605 break; \ 702 break; \
606 } \ 703 } \
704 } \
607 if (!*r || !end) \ 705 if (!*r || !end) \
608 break; \ 706 break; \
609 else \ 707 else \
610 start = start + len + 1; \ 708 start = start + len + 1; \
611 } \ 709 } \
696#define FLAG_S390_LIB64 0x0400 794#define FLAG_S390_LIB64 0x0400
697#define FLAG_POWERPC_LIB64 0x0500 795#define FLAG_POWERPC_LIB64 0x0500
698#define FLAG_MIPS64_LIBN32 0x0600 796#define FLAG_MIPS64_LIBN32 0x0600
699#define FLAG_MIPS64_LIBN64 0x0700 797#define FLAG_MIPS64_LIBN64 0x0700
700 798
701static char *lookup_cache_lib(elfobj *, char *);
702
703#if defined(__GLIBC__) || defined(__UCLIBC__) 799#if defined(__GLIBC__) || defined(__UCLIBC__)
704 800
705static char *lookup_cache_lib(elfobj *elf, char *fname) 801static char *lookup_cache_lib(elfobj *elf, const char *fname)
706{ 802{
707 int fd = 0; 803 int fd;
708 char *strs; 804 char *strs;
709 static char buf[__PAX_UTILS_PATH_MAX] = ""; 805 static char buf[__PAX_UTILS_PATH_MAX] = "";
710 const char *cachefile = "/etc/ld.so.cache"; 806 const char *cachefile = root_rel_path("/etc/ld.so.cache");
711 struct stat st; 807 struct stat st;
712 808
713 typedef struct { 809 typedef struct {
714 char magic[LDSO_CACHE_MAGIC_LEN]; 810 char magic[LDSO_CACHE_MAGIC_LEN];
715 char version[LDSO_CACHE_VER_LEN]; 811 char version[LDSO_CACHE_VER_LEN];
725 libentry_t *libent; 821 libentry_t *libent;
726 822
727 if (fname == NULL) 823 if (fname == NULL)
728 return NULL; 824 return NULL;
729 825
730 if (ldcache == 0) { 826 if (ldcache == NULL) {
731 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1) 827 if (fstatat(root_fd, cachefile, &st, 0))
828 return NULL;
829
830 fd = openat(root_fd, cachefile, O_RDONLY);
831 if (fd == -1)
732 return NULL; 832 return NULL;
733 833
734 /* cache these values so we only map/unmap the cache file once */ 834 /* cache these values so we only map/unmap the cache file once */
735 ldcache_size = st.st_size; 835 ldcache_size = st.st_size;
736 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 836 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
737
738 close(fd); 837 close(fd);
739 838
740 if (ldcache == (caddr_t)-1) { 839 if (ldcache == MAP_FAILED) {
741 ldcache = 0; 840 ldcache = NULL;
742 return NULL; 841 return NULL;
743 } 842 }
744 843
745 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN)) 844 if (memcmp(header->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN) ||
845 memcmp(header->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
846 {
847 munmap(ldcache, ldcache_size);
848 ldcache = NULL;
746 return NULL; 849 return NULL;
747 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
748 return NULL;
749 } 850 }
851 } else
852 header = ldcache;
750 853
751 header = (header_t *) ldcache;
752 libent = (libentry_t *) (ldcache + sizeof(header_t)); 854 libent = ldcache + sizeof(header_t);
753 strs = (char *) &libent[header->nlibs]; 855 strs = (char *) &libent[header->nlibs];
754 856
755 for (fd = 0; fd < header->nlibs; fd++) { 857 for (fd = 0; fd < header->nlibs; ++fd) {
756 /* this should be more fine grained, but for now we assume that 858 /* This should be more fine grained, but for now we assume that
757 * diff arches will not be cached together. and we ignore the 859 * diff arches will not be cached together, and we ignore the
758 * the different multilib mips cases. */ 860 * the different multilib mips cases.
861 */
759 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 862 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
760 continue; 863 continue;
761 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 864 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
762 continue; 865 continue;
763 866
764 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 867 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
765 continue; 868 continue;
869
870 /* Return first hit because that is how the ldso rolls */
766 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 871 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
872 break;
767 } 873 }
874
768 return buf; 875 return buf;
769} 876}
877
770#elif defined(__NetBSD__) 878#elif defined(__NetBSD__)
771static char *lookup_cache_lib(elfobj *elf, char *fname) 879static char *lookup_cache_lib(elfobj *elf, const char *fname)
772{ 880{
773 static char buf[__PAX_UTILS_PATH_MAX] = ""; 881 static char buf[__PAX_UTILS_PATH_MAX] = "";
774 static struct stat st; 882 static struct stat st;
775 883 size_t n;
776 char **ldpath; 884 char *ldpath;
777 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 885
886 array_for_each(ldpath, n, ldpath) {
778 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", *ldpath, fname) >= sizeof(buf)) 887 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 */ 888 continue; /* if the pathname is too long, or something went wrong, ignore */
780 889
781 if (stat(buf, &st) != 0) 890 if (stat(buf, &st) != 0)
782 continue; /* if the lib doesn't exist in *ldpath, look further */ 891 continue; /* if the lib doesn't exist in *ldpath, look further */
783 892
791 900
792 /* not found in any path */ 901 /* not found in any path */
793 return NULL; 902 return NULL;
794} 903}
795#else 904#else
905#ifdef __ELF__
796#warning Cache support not implemented for your target 906#warning Cache support not implemented for your target
907#endif
797static char *lookup_cache_lib(elfobj *elf, char *fname) 908static char *lookup_cache_lib(elfobj *elf, const char *fname)
798{ 909{
799 return NULL; 910 return NULL;
800} 911}
801#endif 912#endif
913
914static char *lookup_config_lib(elfobj *elf, char *fname)
915{
916 static char buf[__PAX_UTILS_PATH_MAX] = "";
917 const char *ldpath;
918 size_t n;
919
920 array_for_each(ldpaths, n, ldpath) {
921 snprintf(buf, sizeof(buf), "%s/%s", root_rel_path(ldpath), fname);
922 if (faccessat(root_fd, buf, F_OK, AT_SYMLINK_NOFOLLOW) == 0)
923 return buf;
924 }
925
926 return NULL;
927}
802 928
803static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len) 929static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
804{ 930{
805 unsigned long i; 931 unsigned long i;
806 char *needed; 932 char *needed;
807 void *strtbl_void; 933 void *strtbl_void;
808 char *p; 934 char *p;
809 935
936 /*
937 * -n -> op==0 -> print all
938 * -N -> op==1 -> print requested
939 */
810 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 940 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
941 return NULL;
811 942
812 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 943 strtbl_void = elf_findsecbyname(elf, ".dynstr");
813 944
814 if (elf->phdr && strtbl_void) { 945 if (elf->phdr && strtbl_void) {
815#define SHOW_NEEDED(B) \ 946#define SHOW_NEEDED(B) \
817 Elf ## B ## _Dyn *dyn; \ 948 Elf ## B ## _Dyn *dyn; \
818 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 949 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
819 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 950 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
820 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 951 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
821 Elf ## B ## _Off offset; \ 952 Elf ## B ## _Off offset; \
953 size_t matched = 0; \
954 /* Walk all the program headers to find the PT_DYNAMIC */ \
822 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 955 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; \ 956 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) \
957 continue; \
824 offset = EGET(phdr[i].p_offset); \ 958 offset = EGET(phdr[i].p_offset); \
825 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 959 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) \
960 continue; \
961 /* Walk all the dynamic tags to find NEEDED entries */ \
826 dyn = DYN ## B (elf->data + offset); \ 962 dyn = DYN ## B (elf->vdata + offset); \
827 while (EGET(dyn->d_tag) != DT_NULL) { \ 963 while (EGET(dyn->d_tag) != DT_NULL) { \
828 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 964 if (EGET(dyn->d_tag) == DT_NEEDED) { \
829 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 965 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
830 if (offset >= (Elf ## B ## _Off)elf->len) { \ 966 if (offset >= (Elf ## B ## _Off)elf->len) { \
831 ++dyn; \ 967 ++dyn; \
832 continue; \ 968 continue; \
833 } \ 969 } \
834 needed = (char*)(elf->data + offset); \ 970 needed = elf->data + offset; \
835 if (op == 0) { \ 971 if (op == 0) { \
972 /* -n -> print all entries */ \
836 if (!be_wewy_wewy_quiet) { \ 973 if (!be_wewy_wewy_quiet) { \
837 if (*found_needed) xchrcat(ret, ',', ret_len); \ 974 if (*found_needed) xchrcat(ret, ',', ret_len); \
838 if (use_ldcache) \ 975 if (use_ldpath) { \
976 if ((p = lookup_config_lib(elf, needed)) != NULL) \
977 needed = p; \
978 } else if (use_ldcache) { \
839 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 979 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
840 needed = p; \ 980 needed = p; \
981 } \
841 xstrcat(ret, needed, ret_len); \ 982 xstrcat(ret, needed, ret_len); \
842 } \ 983 } \
843 *found_needed = 1; \ 984 *found_needed = 1; \
844 } else { \ 985 } else { \
845 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \ 986 /* -N -> print matching entries */ \
987 size_t n; \
988 const char *find_lib_name; \
989 \
990 array_for_each(find_lib_arr, n, find_lib_name) { \
991 int invert = 1; \
992 if (find_lib_name[0] == '!') \
993 invert = 0, ++find_lib_name; \
994 if (!strcmp(find_lib_name, needed) == invert) \
995 ++matched; \
996 } \
997 \
998 if (matched == array_cnt(find_lib_arr)) { \
846 *found_lib = 1; \ 999 *found_lib = 1; \
847 return (be_wewy_wewy_quiet ? NULL : needed); \ 1000 return (be_wewy_wewy_quiet ? NULL : find_lib); \
848 } \ 1001 } \
849 } \ 1002 } \
850 } \ 1003 } \
851 ++dyn; \ 1004 ++dyn; \
852 } \ 1005 } \
897 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 1050 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; \ 1051 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
899 dynamic = 1; \ 1052 dynamic = 1; \
900 offset = EGET(phdr[i].p_offset); \ 1053 offset = EGET(phdr[i].p_offset); \
901 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 1054 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
902 dyn = DYN ## B (elf->data + offset); \ 1055 dyn = DYN ## B (elf->vdata + offset); \
903 while (EGET(dyn->d_tag) != DT_NULL) { \ 1056 while (EGET(dyn->d_tag) != DT_NULL) { \
904 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 1057 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
905 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \ 1058 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
906 { \ 1059 { \
907 if (be_quiet) return NULL; \ 1060 if (be_quiet) return NULL; \
920 /* don't output anything if quiet mode and the ELF is static or not setuid */ 1073 /* 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))))) { 1074 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
922 return NULL; 1075 return NULL;
923 } else { 1076 } else {
924 *found_bind = 1; 1077 *found_bind = 1;
925 return (char *) (dynamic ? "LAZY" : "STATIC"); 1078 return (char *)(dynamic ? "LAZY" : "STATIC");
926 } 1079 }
927} 1080}
928static char *scanelf_file_soname(elfobj *elf, char *found_soname) 1081static char *scanelf_file_soname(elfobj *elf, char *found_soname)
929{ 1082{
930 unsigned long i; 1083 unsigned long i;
942 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 1095 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
943 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 1096 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
944 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 1097 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
945 Elf ## B ## _Off offset; \ 1098 Elf ## B ## _Off offset; \
946 /* only look for soname in shared objects */ \ 1099 /* only look for soname in shared objects */ \
947 if (ehdr->e_type != ET_DYN) \ 1100 if (EGET(ehdr->e_type) != ET_DYN) \
948 return NULL; \ 1101 return NULL; \
949 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 1102 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; \ 1103 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
951 offset = EGET(phdr[i].p_offset); \ 1104 offset = EGET(phdr[i].p_offset); \
952 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 1105 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
953 dyn = DYN ## B (elf->data + offset); \ 1106 dyn = DYN ## B (elf->vdata + offset); \
954 while (EGET(dyn->d_tag) != DT_NULL) { \ 1107 while (EGET(dyn->d_tag) != DT_NULL) { \
955 if (EGET(dyn->d_tag) == DT_SONAME) { \ 1108 if (EGET(dyn->d_tag) == DT_SONAME) { \
956 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 1109 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
957 if (offset >= (Elf ## B ## _Off)elf->len) { \ 1110 if (offset >= (Elf ## B ## _Off)elf->len) { \
958 ++dyn; \ 1111 ++dyn; \
959 continue; \ 1112 continue; \
960 } \ 1113 } \
961 soname = (char*)(elf->data + offset); \ 1114 soname = elf->data + offset; \
962 *found_soname = 1; \ 1115 *found_soname = 1; \
963 return (be_wewy_wewy_quiet ? NULL : soname); \ 1116 return (be_wewy_wewy_quiet ? NULL : soname); \
964 } \ 1117 } \
965 ++dyn; \ 1118 ++dyn; \
966 } \ 1119 } \
970 } 1123 }
971 1124
972 return NULL; 1125 return NULL;
973} 1126}
974 1127
1128/*
1129 * We support the symbol form:
1130 * [%[modifiers]%][[+-]<symbol name>][,[.....]]
1131 * If the symbol name is empty, then all symbols are matched.
1132 * If the symbol name is a glob ("*"), then all symbols are dumped (debug).
1133 * Do not rely on this output format at all.
1134 * Otherwise the symbol name is used to search (either regex or string compare).
1135 * If the first char of the symbol name is a plus ("+"), then only match
1136 * defined symbols. If it's a minus ("-"), only match undefined symbols.
1137 * Putting modifiers in between the percent signs allows for more in depth
1138 * filters. There are groups of modifiers. If you don't specify a member
1139 * of a group, then all types in that group are matched. The current
1140 * groups and their types are:
1141 * STT group: STT_NOTYPE:n STT_OBJECT:o STT_FUNC:f STT_FILE:F
1142 * STB group: STB_LOCAL:l STB_GLOBAL:g STB_WEAK:w
1143 * SHN group: SHN_UNDEF:u SHN_ABS:a SHN_COMMON:c {defined}:d
1144 * The "defined" value in the SHN group does not correspond to a SHN_xxx define.
1145 * You can search for multiple symbols at once by seperating with a comma (",").
1146 *
1147 * Some examples:
1148 * ELFs with a weak function "foo":
1149 * scanelf -s %wf%foo <ELFs>
1150 * ELFs that define the symbol "main":
1151 * scanelf -s +main <ELFs>
1152 * scanelf -s %d%main <ELFs>
1153 * ELFs that refer to the undefined symbol "brk":
1154 * scanelf -s -brk <ELFs>
1155 * scanelf -s %u%brk <ELFs>
1156 * All global defined objects in an ELF:
1157 * scanelf -s %ogd% <ELF>
1158 */
1159static void
1160scanelf_match_symname(elfobj *elf, char *found_sym, char **ret, size_t *ret_len, const char *symname,
1161 unsigned int stt, unsigned int stb, unsigned int shn, unsigned long size)
1162{
1163 char *this_sym, *next_sym, saved = saved;
1164
1165 /* allow the user to specify a comma delimited list of symbols to search for */
1166 next_sym = NULL;
1167 do {
1168 bool inc_notype, inc_object, inc_func, inc_file,
1169 inc_local, inc_global, inc_weak,
1170 inc_def, inc_undef, inc_abs, inc_common;
1171
1172 if (next_sym) {
1173 next_sym[-1] = saved;
1174 this_sym = next_sym;
1175 } else
1176 this_sym = find_sym;
1177 if ((next_sym = strchr(this_sym, ','))) {
1178 /* make parsing easier by killing the comma temporarily */
1179 saved = *next_sym;
1180 *next_sym = '\0';
1181 next_sym += 1;
1182 }
1183
1184 /* symbol selection! */
1185 inc_notype = inc_object = inc_func = inc_file = \
1186 inc_local = inc_global = inc_weak = \
1187 inc_def = inc_undef = inc_abs = inc_common = \
1188 (*this_sym != '%');
1189
1190 /* parse the contents of %...% */
1191 if (!inc_notype) {
1192 while (*(this_sym++)) {
1193 if (*this_sym == '%') {
1194 ++this_sym;
1195 break;
1196 }
1197 switch (*this_sym) {
1198 case 'n': inc_notype = true; break;
1199 case 'o': inc_object = true; break;
1200 case 'f': inc_func = true; break;
1201 case 'F': inc_file = true; break;
1202 case 'l': inc_local = true; break;
1203 case 'g': inc_global = true; break;
1204 case 'w': inc_weak = true; break;
1205 case 'd': inc_def = true; break;
1206 case 'u': inc_undef = true; break;
1207 case 'a': inc_abs = true; break;
1208 case 'c': inc_common = true; break;
1209 default: err("invalid symbol selector '%c'", *this_sym);
1210 }
1211 }
1212
1213 /* If no types are matched, not match all */
1214 if (!inc_notype && !inc_object && !inc_func && !inc_file)
1215 inc_notype = inc_object = inc_func = inc_file = true;
1216 if (!inc_local && !inc_global && !inc_weak)
1217 inc_local = inc_global = inc_weak = true;
1218 if (!inc_def && !inc_undef && !inc_abs && !inc_common)
1219 inc_def = inc_undef = inc_abs = inc_common = true;
1220
1221 /* backwards compat for defined/undefined short hand */
1222 } else if (*this_sym == '+') {
1223 inc_undef = false;
1224 ++this_sym;
1225 } else if (*this_sym == '-') {
1226 inc_def = inc_abs = inc_common = false;
1227 ++this_sym;
1228 }
1229
1230 /* filter symbols */
1231 if ((!inc_notype && stt == STT_NOTYPE) || \
1232 (!inc_object && stt == STT_OBJECT) || \
1233 (!inc_func && stt == STT_FUNC ) || \
1234 (!inc_file && stt == STT_FILE ) || \
1235 (!inc_local && stb == STB_LOCAL ) || \
1236 (!inc_global && stb == STB_GLOBAL) || \
1237 (!inc_weak && stb == STB_WEAK ) || \
1238 (!inc_def && shn && shn < SHN_LORESERVE) || \
1239 (!inc_undef && shn == SHN_UNDEF ) || \
1240 (!inc_abs && shn == SHN_ABS ) || \
1241 (!inc_common && shn == SHN_COMMON))
1242 continue;
1243
1244 if (*this_sym == '*') {
1245 /* a "*" symbol gets you debug output */
1246 printf("%s(%s) %5lX %15s %15s %15s %s\n",
1247 ((*found_sym == 0) ? "\n\t" : "\t"),
1248 elf->base_filename,
1249 size,
1250 get_elfstttype(stt),
1251 get_elfstbtype(stb),
1252 get_elfshntype(shn),
1253 symname);
1254 goto matched;
1255
1256 } else {
1257 if (g_match) {
1258 /* regex match the symbol */
1259 if (rematch(this_sym, symname, REG_EXTENDED) != 0)
1260 continue;
1261
1262 } else if (*this_sym) {
1263 /* give empty symbols a "pass", else do a normal compare */
1264 const size_t len = strlen(this_sym);
1265 if (!(strncmp(this_sym, symname, len) == 0 &&
1266 /* Accept unversioned symbol names */
1267 (symname[len] == '\0' || symname[len] == '@')))
1268 continue;
1269 }
1270
1271 if (be_semi_verbose) {
1272 char buf[1024];
1273 snprintf(buf, sizeof(buf), "%lX %s %s",
1274 size,
1275 get_elfstttype(stt),
1276 this_sym);
1277 *ret = xstrdup(buf);
1278 } else {
1279 if (*ret) xchrcat(ret, ',', ret_len);
1280 xstrcat(ret, symname, ret_len);
1281 }
1282
1283 goto matched;
1284 }
1285 } while (next_sym);
1286
1287 return;
1288
1289 matched:
1290 *found_sym = 1;
1291 if (next_sym)
1292 next_sym[-1] = saved;
1293}
1294
975static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1295static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
976{ 1296{
977 unsigned long i;
978 char *ret; 1297 char *ret;
979 void *symtab_void, *strtab_void; 1298 void *symtab_void, *strtab_void;
980 1299
981 if (!find_sym) return NULL; 1300 if (!find_sym) return NULL;
982 ret = find_sym; 1301 ret = NULL;
983 1302
984 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1303 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
985 1304
986 if (symtab_void && strtab_void) { 1305 if (symtab_void && strtab_void) {
987#define FIND_SYM(B) \ 1306#define FIND_SYM(B) \
988 if (elf->elf_class == ELFCLASS ## B) { \ 1307 if (elf->elf_class == ELFCLASS ## B) { \
989 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1308 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
990 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1309 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
991 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 1310 Elf ## B ## _Sym *sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
992 unsigned long cnt = EGET(symtab->sh_entsize); \ 1311 Elf ## B ## _Word i, cnt = EGET(symtab->sh_entsize); \
993 char *symname; \ 1312 char *symname; \
1313 size_t ret_len = 0; \
994 if (cnt) \ 1314 if (cnt) \
995 cnt = EGET(symtab->sh_size) / cnt; \ 1315 cnt = EGET(symtab->sh_size) / cnt; \
996 for (i = 0; i < cnt; ++i) { \ 1316 for (i = 0; i < cnt; ++i) { \
1317 if ((void*)sym > elf->data_end) { \
1318 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1319 goto break_out; \
1320 } \
997 if (sym->st_name) { \ 1321 if (sym->st_name) { \
998 /* make sure the symbol name is in acceptable memory range */ \ 1322 /* make sure the symbol name is in acceptable memory range */ \
999 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1323 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
1000 if ((void*)symname > (void*)elf->data_end) { \ 1324 if ((void*)symname > elf->data_end) { \
1001 warnf("%s: corrupt ELF symbols", elf->filename); \ 1325 warnf("%s: corrupt ELF symbols", elf->filename); \
1002 ++sym; \ 1326 ++sym; \
1003 continue; \ 1327 continue; \
1004 } \ 1328 } \
1005 /* debug display ... show all symbols and some extra info */ \ 1329 scanelf_match_symname(elf, found_sym, \
1006 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \ 1330 &ret, &ret_len, symname, \
1007 printf("%s(%s) %5lX %15s %s %s\n", \ 1331 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
1008 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1332 ELF##B##_ST_BIND(EGET(sym->st_info)), \
1009 elf->base_filename, \ 1333 EGET(sym->st_shndx), \
1010 (unsigned long)sym->st_size, \ 1334 /* st_size can be 64bit, but no one is really that big, so screw em */ \
1011 get_elfstttype(sym->st_info), \ 1335 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 } \ 1336 } \
1053 ++sym; \ 1337 ++sym; \
1054 } } 1338 } \
1339 }
1055 FIND_SYM(32) 1340 FIND_SYM(32)
1056 FIND_SYM(64) 1341 FIND_SYM(64)
1057 } 1342 }
1058 1343
1059break_out: 1344break_out:
1062 if (*find_sym != '*' && *found_sym) 1347 if (*find_sym != '*' && *found_sym)
1063 return ret; 1348 return ret;
1064 if (be_quiet) 1349 if (be_quiet)
1065 return NULL; 1350 return NULL;
1066 else 1351 else
1067 return (char *)" - "; 1352 return " - ";
1068} 1353}
1069 1354
1070
1071static char *scanelf_file_sections(elfobj *elf, char *found_section) 1355static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1072{ 1356{
1073 if (!find_section) 1357 if (!find_section)
1074 return NULL; 1358 return NULL;
1075 1359
1076#define FIND_SECTION(B) \ 1360#define FIND_SECTION(B) \
1077 if (elf->elf_class == ELFCLASS ## B) { \ 1361 if (elf->elf_class == ELFCLASS ## B) { \
1362 size_t matched, n; \
1078 int invert; \ 1363 int invert; \
1364 const char *section_name; \
1079 Elf ## B ## _Shdr *section; \ 1365 Elf ## B ## _Shdr *section; \
1366 \
1367 matched = 0; \
1368 array_for_each(find_section_arr, n, section_name) { \
1080 invert = (*find_section == '!' ? 1 : 0); \ 1369 invert = (*section_name == '!' ? 1 : 0); \
1081 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1370 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1082 if ((section == NULL && invert) || (section != NULL && !invert)) \ 1371 if ((section == NULL && invert) || (section != NULL && !invert)) \
1372 ++matched; \
1373 } \
1374 \
1375 if (matched == array_cnt(find_section_arr)) \
1083 *found_section = 1; \ 1376 *found_section = 1; \
1084 } 1377 }
1085 FIND_SECTION(32) 1378 FIND_SECTION(32)
1086 FIND_SECTION(64) 1379 FIND_SECTION(64)
1087 1380
1092 return find_section; 1385 return find_section;
1093 1386
1094 if (be_quiet) 1387 if (be_quiet)
1095 return NULL; 1388 return NULL;
1096 else 1389 else
1097 return (char *)" - "; 1390 return " - ";
1098} 1391}
1099 1392
1100/* scan an elf file and show all the fun stuff */ 1393/* scan an elf file and show all the fun stuff */
1101#define prints(str) write(fileno(stdout), str, strlen(str)) 1394#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1102static int scanelf_elfobj(elfobj *elf) 1395static int scanelf_elfobj(elfobj *elf)
1103{ 1396{
1104 unsigned long i; 1397 unsigned long i;
1105 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1398 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1106 found_rpath, found_needed, found_interp, found_bind, found_soname, 1399 found_rpath, found_needed, found_interp, found_bind, found_soname,
1120 printf("%s: scanning file\n", elf->filename); 1413 printf("%s: scanning file\n", elf->filename);
1121 1414
1122 /* init output buffer */ 1415 /* init output buffer */
1123 if (!out_buffer) { 1416 if (!out_buffer) {
1124 out_len = sizeof(char) * 80; 1417 out_len = sizeof(char) * 80;
1125 out_buffer = (char*)xmalloc(out_len); 1418 out_buffer = xmalloc(out_len);
1126 } 1419 }
1127 *out_buffer = '\0'; 1420 *out_buffer = '\0';
1128 1421
1129 /* show the header */ 1422 /* show the header */
1130 if (!be_quiet && show_banner) { 1423 if (!be_quiet && show_banner) {
1142 case 'x': prints(" PAX "); break; 1435 case 'x': prints(" PAX "); break;
1143 case 'e': prints("STK/REL/PTL "); break; 1436 case 'e': prints("STK/REL/PTL "); break;
1144 case 't': prints("TEXTREL "); break; 1437 case 't': prints("TEXTREL "); break;
1145 case 'r': prints("RPATH "); break; 1438 case 'r': prints("RPATH "); break;
1146 case 'M': prints("CLASS "); break; 1439 case 'M': prints("CLASS "); break;
1440 case 'l':
1147 case 'n': prints("NEEDED "); break; 1441 case 'n': prints("NEEDED "); break;
1148 case 'i': prints("INTERP "); break; 1442 case 'i': prints("INTERP "); break;
1149 case 'b': prints("BIND "); break; 1443 case 'b': prints("BIND "); break;
1444 case 'Z': prints("SIZE "); break;
1150 case 'S': prints("SONAME "); break; 1445 case 'S': prints("SONAME "); break;
1151 case 's': prints("SYM "); break; 1446 case 's': prints("SYM "); break;
1152 case 'N': prints("LIB "); break; 1447 case 'N': prints("LIB "); break;
1153 case 'T': prints("TEXTRELS "); break; 1448 case 'T': prints("TEXTRELS "); break;
1154 case 'k': prints("SECTION "); break; 1449 case 'k': prints("SECTION "); break;
1155 case 'a': prints("ARCH "); break; 1450 case 'a': prints("ARCH "); break;
1451 case 'I': prints("OSABI "); break;
1452 case 'Y': prints("EABI "); break;
1156 case 'O': prints("PERM "); break; 1453 case 'O': prints("PERM "); break;
1157 case 'D': prints("ENDIAN "); break; 1454 case 'D': prints("ENDIAN "); break;
1158 default: warnf("'%c' has no title ?", out_format[i]); 1455 default: warnf("'%c' has no title ?", out_format[i]);
1159 } 1456 }
1160 } 1457 }
1166 1463
1167 /* dump all the good stuff */ 1464 /* dump all the good stuff */
1168 for (i = 0; out_format[i]; ++i) { 1465 for (i = 0; out_format[i]; ++i) {
1169 const char *out; 1466 const char *out;
1170 const char *tmp; 1467 const char *tmp;
1171 1468 static char ubuf[sizeof(unsigned long)*2];
1172 if (!IS_MODIFIER(out_format[i])) { 1469 if (!IS_MODIFIER(out_format[i])) {
1173 xchrcat(&out_buffer, out_format[i], &out_len); 1470 xchrcat(&out_buffer, out_format[i], &out_len);
1174 continue; 1471 continue;
1175 } 1472 }
1176 1473
1214 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1511 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1215 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break; 1512 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; 1513 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; 1514 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1218 case 'D': out = get_endian(elf); break; 1515 case 'D': out = get_endian(elf); break;
1219 case 'O': out = getstr_perms(elf->filename); break; 1516 case 'O': out = strfileperms(elf->filename); break;
1220 case 'n': 1517 case 'n':
1221 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; 1518 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; 1519 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1223 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1520 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1224 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1521 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1225 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1522 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1226 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1523 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1227 case 'a': out = get_elfemtype(elf); break; 1524 case 'a': out = get_elfemtype(elf); break;
1525 case 'I': out = get_elfosabi(elf); break;
1526 case 'Y': out = get_elf_eabi(elf); break;
1527 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]); 1528 default: warnf("'%c' has no scan code?", out_format[i]);
1229 } 1529 }
1230 if (out) { 1530 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); 1531 xstrcat(&out_buffer, out, &out_len);
1236 }
1237 } 1532 }
1238 1533
1239#define FOUND_SOMETHING() \ 1534#define FOUND_SOMETHING() \
1240 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1535 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1241 found_rpath || found_needed || found_interp || found_bind || \ 1536 found_rpath || found_needed || found_interp || found_bind || \
1260 elfobj *elf; 1555 elfobj *elf;
1261 1556
1262 /* verify this is real ELF */ 1557 /* verify this is real ELF */
1263 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) { 1558 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1264 if (be_verbose > 2) printf("%s: not an ELF\n", filename); 1559 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1265 return ret; 1560 return 2;
1266 } 1561 }
1267 switch (match_bits) { 1562 switch (match_bits) {
1268 case 32: 1563 case 32:
1269 if (elf->elf_class != ELFCLASS32) 1564 if (elf->elf_class != ELFCLASS32)
1270 goto label_done; 1565 goto label_done;
1273 if (elf->elf_class != ELFCLASS64) 1568 if (elf->elf_class != ELFCLASS64)
1274 goto label_done; 1569 goto label_done;
1275 break; 1570 break;
1276 default: break; 1571 default: break;
1277 } 1572 }
1278 if (strlen(match_etypes)) { 1573 if (match_etypes) {
1279 char sbuf[126]; 1574 char sbuf[126];
1280 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1575 strncpy(sbuf, match_etypes, sizeof(sbuf));
1281 if (strchr(match_etypes, ',') != NULL) { 1576 if (strchr(match_etypes, ',') != NULL) {
1282 char *p; 1577 char *p;
1283 while((p = strrchr(sbuf, ',')) != NULL) { 1578 while ((p = strrchr(sbuf, ',')) != NULL) {
1284 *p = 0; 1579 *p = 0;
1285 if (etype_lookup(p+1) == get_etype(elf)) 1580 if (etype_lookup(p+1) == get_etype(elf))
1286 goto label_ret; 1581 goto label_ret;
1287 } 1582 }
1288 } 1583 }
1308 1603
1309 ar = ar_open_fd(filename, fd); 1604 ar = ar_open_fd(filename, fd);
1310 if (ar == NULL) 1605 if (ar == NULL)
1311 return 1; 1606 return 1;
1312 1607
1313 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0); 1608 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) { 1609 while ((m = ar_next(ar)) != NULL) {
1610 off_t cur_pos = lseek(fd, 0, SEEK_CUR);
1611 if (cur_pos == -1)
1612 errp("lseek() failed");
1315 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size); 1613 elf = readelf_buffer(m->name, ar_buffer + cur_pos, m->size);
1316 if (elf) { 1614 if (elf) {
1317 scanelf_elfobj(elf); 1615 scanelf_elfobj(elf);
1318 unreadelf(elf); 1616 unreadelf(elf);
1319 } 1617 }
1320 } 1618 }
1321 munmap(ar_buffer, len); 1619 munmap(ar_buffer, len);
1322 1620
1323 return 0; 1621 return 0;
1324} 1622}
1325/* scan a file which may be an elf or an archive or some other magical beast */ 1623/* 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) 1624static int scanelf_fileat(int dir_fd, const char *filename, const struct stat *st_cache)
1327{ 1625{
1328 const struct stat *st = st_cache; 1626 const struct stat *st = st_cache;
1329 struct stat symlink_st; 1627 struct stat symlink_st;
1330 int fd; 1628 int fd;
1331 1629
1332 /* always handle regular files and handle symlinked files if no -y */ 1630 /* always handle regular files and handle symlinked files if no -y */
1333 if (S_ISLNK(st->st_mode)) { 1631 if (S_ISLNK(st->st_mode)) {
1334 if (!scan_symlink) return 1; 1632 if (!scan_symlink)
1633 return 1;
1335 stat(filename, &symlink_st); 1634 fstatat(dir_fd, filename, &symlink_st, 0);
1336 st = &symlink_st; 1635 st = &symlink_st;
1337 } 1636 }
1338 1637
1339 if (!S_ISREG(st->st_mode)) { 1638 if (!S_ISREG(st->st_mode)) {
1340 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1639 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1343 1642
1344 if (match_perms) { 1643 if (match_perms) {
1345 if ((st->st_mode | match_perms) != st->st_mode) 1644 if ((st->st_mode | match_perms) != st->st_mode)
1346 return 1; 1645 return 1;
1347 } 1646 }
1348 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1647 fd = openat(dir_fd, filename, (fix_elf ? O_RDWR : O_RDONLY) | O_CLOEXEC);
1648 if (fd == -1)
1349 return 1; 1649 return 1;
1350 1650
1351 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives) 1651 if (scanelf_elf(filename, fd, st->st_size) == 2) {
1352 /* if it isn't an ELF, maybe it's an .a archive */ 1652 /* if it isn't an ELF, maybe it's an .a archive */
1653 if (scan_archives)
1353 scanelf_archive(filename, fd, st->st_size); 1654 scanelf_archive(filename, fd, st->st_size);
1354 1655
1656 /*
1657 * unreadelf() implicitly closes its fd, so only close it
1658 * when we are returning it in the non-ELF case
1659 */
1355 close(fd); 1660 close(fd);
1661 }
1662
1356 return 0; 1663 return 0;
1357} 1664}
1358 1665
1359/* scan a directory for ET_EXEC files and print when we find one */ 1666/* scan a directory for ET_EXEC files and print when we find one */
1360static int scanelf_dir(const char *path) 1667static int scanelf_dirat(int dir_fd, const char *path)
1361{ 1668{
1362 register DIR *dir; 1669 register DIR *dir;
1363 register struct dirent *dentry; 1670 register struct dirent *dentry;
1364 struct stat st_top, st; 1671 struct stat st_top, st;
1365 char buf[__PAX_UTILS_PATH_MAX]; 1672 char buf[__PAX_UTILS_PATH_MAX], *subpath;
1366 size_t pathlen = 0, len = 0; 1673 size_t pathlen = 0, len = 0;
1367 int ret = 0; 1674 int ret = 0;
1675 int subdir_fd;
1368 1676
1369 /* make sure path exists */ 1677 /* make sure path exists */
1370 if (lstat(path, &st_top) == -1) { 1678 if (fstatat(dir_fd, path, &st_top, AT_SYMLINK_NOFOLLOW) == -1) {
1371 if (be_verbose > 2) printf("%s: does not exist\n", path); 1679 if (be_verbose > 2) printf("%s: does not exist\n", path);
1372 return 1; 1680 return 1;
1373 } 1681 }
1374 1682
1375 /* ok, if it isn't a directory, assume we can open it */ 1683 /* ok, if it isn't a directory, assume we can open it */
1376 if (!S_ISDIR(st_top.st_mode)) { 1684 if (!S_ISDIR(st_top.st_mode))
1377 return scanelf_file(path, &st_top); 1685 return scanelf_fileat(dir_fd, path, &st_top);
1378 }
1379 1686
1380 /* now scan the dir looking for fun stuff */ 1687 /* now scan the dir looking for fun stuff */
1381 if ((dir = opendir(path)) == NULL) { 1688 subdir_fd = openat(dir_fd, path, O_RDONLY|O_CLOEXEC);
1382 warnf("could not opendir %s: %s", path, strerror(errno)); 1689 if (subdir_fd == -1)
1690 dir = NULL;
1691 else
1692 dir = fdopendir(subdir_fd);
1693 if (dir == NULL) {
1694 if (subdir_fd != -1)
1695 close(subdir_fd);
1696 warnfp("could not opendir(%s)", path);
1383 return 1; 1697 return 1;
1384 } 1698 }
1385 if (be_verbose > 1) printf("%s: scanning dir\n", path); 1699 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1386 1700
1387 pathlen = strlen(path); 1701 subpath = stpcpy(buf, path);
1702 if (subpath[-1] != '/')
1703 *subpath++ = '/';
1704 pathlen = subpath - buf;
1388 while ((dentry = readdir(dir))) { 1705 while ((dentry = readdir(dir))) {
1389 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 1706 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
1390 continue; 1707 continue;
1708
1709 if (fstatat(subdir_fd, dentry->d_name, &st, AT_SYMLINK_NOFOLLOW) == -1)
1710 continue;
1711
1391 len = (pathlen + 1 + strlen(dentry->d_name) + 1); 1712 len = strlen(dentry->d_name);
1392 if (len >= sizeof(buf)) { 1713 if (len + pathlen + 1 >= sizeof(buf)) {
1393 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, 1714 warnf("Skipping '%s%s': len > sizeof(buf); %zu > %zu\n",
1394 (unsigned long)len, (unsigned long)sizeof(buf)); 1715 path, dentry->d_name, len + pathlen + 1, sizeof(buf));
1395 continue; 1716 continue;
1396 } 1717 }
1397 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name); 1718 memcpy(subpath, dentry->d_name, len);
1398 if (lstat(buf, &st) != -1) { 1719 subpath[len] = '\0';
1720
1399 if (S_ISREG(st.st_mode)) 1721 if (S_ISREG(st.st_mode))
1400 ret = scanelf_file(buf, &st); 1722 ret = scanelf_fileat(dir_fd, buf, &st);
1401 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1723 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1402 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1724 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1403 ret = scanelf_dir(buf); 1725 ret = scanelf_dirat(dir_fd, buf);
1404 }
1405 } 1726 }
1406 } 1727 }
1407 closedir(dir); 1728 closedir(dir);
1729
1408 return ret; 1730 return ret;
1409} 1731}
1732static int scanelf_dir(const char *path)
1733{
1734 return scanelf_dirat(root_fd, root_rel_path(path));
1735}
1410 1736
1411static int scanelf_from_file(const char *filename) 1737static int scanelf_from_file(const char *filename)
1412{ 1738{
1413 FILE *fp = NULL; 1739 FILE *fp;
1414 char *p; 1740 char *p, *path;
1415 char path[__PAX_UTILS_PATH_MAX]; 1741 size_t len;
1416 int ret = 0; 1742 int ret;
1417 1743
1418 if (strcmp(filename, "-") == 0) 1744 if (strcmp(filename, "-") == 0)
1419 fp = stdin; 1745 fp = stdin;
1420 else if ((fp = fopen(filename, "r")) == NULL) 1746 else if ((fp = fopen(filename, "r")) == NULL)
1421 return 1; 1747 return 1;
1422 1748
1423 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1749 path = NULL;
1750 len = 0;
1751 ret = 0;
1752 while (getline(&path, &len, fp) != -1) {
1424 if ((p = strchr(path, '\n')) != NULL) 1753 if ((p = strchr(path, '\n')) != NULL)
1425 *p = 0; 1754 *p = 0;
1426 search_path = path; 1755 search_path = path;
1427 ret = scanelf_dir(path); 1756 ret = scanelf_dir(path);
1428 } 1757 }
1758 free(path);
1759
1429 if (fp != stdin) 1760 if (fp != stdin)
1430 fclose(fp); 1761 fclose(fp);
1762
1431 return ret; 1763 return ret;
1432} 1764}
1433 1765
1434#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__) 1766#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1435 1767
1436static int load_ld_cache_config(int i, const char *fname) 1768static int _load_ld_cache_config(const char *fname)
1437{ 1769{
1438 FILE *fp = NULL; 1770 FILE *fp = NULL;
1439 char *p; 1771 char *p, *path;
1440 char path[__PAX_UTILS_PATH_MAX]; 1772 size_t len;
1773 int curr_fd = -1;
1441 1774
1442 if (i + 1 == ARRAY_SIZE(ldpaths)) 1775 fp = fopenat_r(root_fd, root_rel_path(fname));
1776 if (fp == NULL)
1443 return i; 1777 return -1;
1444 1778
1445 if ((fp = fopen(fname, "r")) == NULL) 1779 path = NULL;
1446 return i; 1780 len = 0;
1447 1781 while (getline(&path, &len, fp) != -1) {
1448 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1449 if ((p = strrchr(path, '\r')) != NULL) 1782 if ((p = strrchr(path, '\r')) != NULL)
1450 *p = 0; 1783 *p = 0;
1451 if ((p = strchr(path, '\n')) != NULL) 1784 if ((p = strchr(path, '\n')) != NULL)
1452 *p = 0; 1785 *p = 0;
1453#ifdef __linux__ 1786
1454 // recursive includes of the same file will make this segfault. 1787 /* recursive includes of the same file will make this segfault. */
1455 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1788 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1456 glob64_t gl; 1789 glob_t gl;
1457 size_t x; 1790 size_t x;
1458 char gpath[__PAX_UTILS_PATH_MAX]; 1791 const char *gpath;
1459 1792
1460 memset(gpath, 0, sizeof(gpath)); 1793 /* re-use existing path buffer ... need to be creative */
1461
1462 if (path[8] != '/') 1794 if (path[8] != '/')
1463 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1795 gpath = memcpy(path + 3, "/etc/", 5);
1464 else 1796 else
1465 strncpy(gpath, &path[8], sizeof(gpath)); 1797 gpath = path + 8;
1798 if (root_fd != AT_FDCWD) {
1799 if (curr_fd == -1) {
1800 curr_fd = open(".", O_RDONLY|O_CLOEXEC);
1801 if (fchdir(root_fd))
1802 errp("unable to change to root dir");
1803 }
1804 gpath = root_rel_path(gpath);
1805 }
1466 1806
1467 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1807 if (glob(gpath, 0, NULL, &gl) == 0) {
1468 for (x = 0; x < gl.gl_pathc; ++x) { 1808 for (x = 0; x < gl.gl_pathc; ++x) {
1469 /* try to avoid direct loops */ 1809 /* try to avoid direct loops */
1470 if (strcmp(gl.gl_pathv[x], fname) == 0) 1810 if (strcmp(gl.gl_pathv[x], fname) == 0)
1471 continue; 1811 continue;
1472 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1812 _load_ld_cache_config(gl.gl_pathv[x]);
1473 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1474 globfree64(&gl);
1475 return i;
1476 }
1477 } 1813 }
1478 globfree64 (&gl); 1814 globfree(&gl);
1479 continue;
1480 } 1815 }
1816
1817 /* failed globs are ignored by glibc */
1818 continue;
1481 } 1819 }
1482#endif 1820
1483 if (*path != '/') 1821 if (*path != '/')
1484 continue; 1822 continue;
1485 1823
1486 ldpaths[i++] = xstrdup(path); 1824 xarraypush_str(ldpaths, path);
1487
1488 if (i + 1 == ARRAY_SIZE(ldpaths))
1489 break;
1490 } 1825 }
1491 ldpaths[i] = NULL; 1826 free(path);
1492 1827
1493 fclose(fp); 1828 fclose(fp);
1829
1830 if (curr_fd != -1) {
1831 if (fchdir(curr_fd))
1832 /* don't care */;
1833 close(curr_fd);
1834 }
1835
1494 return i; 1836 return 0;
1495} 1837}
1496 1838
1497#elif defined(__FreeBSD__) || (__DragonFly__) 1839#elif defined(__FreeBSD__) || defined(__DragonFly__)
1498 1840
1499static int load_ld_cache_config(int i, const char *fname) 1841static int _load_ld_cache_config(const char *fname)
1500{ 1842{
1501 FILE *fp = NULL; 1843 FILE *fp = NULL;
1502 char *b = NULL, *p; 1844 char *b = NULL, *p;
1503 struct elfhints_hdr hdr; 1845 struct elfhints_hdr hdr;
1504 1846
1505 if (i + 1 == ARRAY_SIZE(ldpaths)) 1847 fp = fopenat_r(root_fd, root_rel_path(fname));
1848 if (fp == NULL)
1506 return i; 1849 return -1;
1507
1508 if ((fp = fopen(fname, "r")) == NULL)
1509 return i;
1510 1850
1511 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1851 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1512 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 || 1852 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1513 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1) 1853 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1514 { 1854 {
1515 fclose(fp); 1855 fclose(fp);
1516 return i; 1856 return -1;
1517 } 1857 }
1518 1858
1519 b = (char*)malloc(hdr.dirlistlen+1); 1859 b = xmalloc(hdr.dirlistlen + 1);
1520 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) { 1860 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1521 fclose(fp); 1861 fclose(fp);
1522 free(b); 1862 free(b);
1523 return i; 1863 return -1;
1524 } 1864 }
1525 1865
1526 while ((p = strsep(&b, ":"))) { 1866 while ((p = strsep(&b, ":"))) {
1527 if (*p == '\0') continue; 1867 if (*p == '\0')
1528 ldpaths[i++] = xstrdup(p); 1868 continue;
1529 1869 xarraypush_str(ldpaths, p);
1530 if (i + 1 == ARRAY_SIZE(ldpaths))
1531 break;
1532 } 1870 }
1533 ldpaths[i] = NULL;
1534 1871
1535 free(b); 1872 free(b);
1536 fclose(fp); 1873 fclose(fp);
1537 return i; 1874 return 0;
1538} 1875}
1539 1876
1540#else 1877#else
1541 1878#ifdef __ELF__
1542#warning Cache config support not implemented for your target 1879#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 1880#endif
1881static int _load_ld_cache_config(const char *fname)
1882{
1883 return 0;
1884}
1885#endif
1886
1887static void load_ld_cache_config(const char *fname)
1888{
1889 bool scan_l, scan_ul, scan_ull;
1890 size_t n;
1891 const char *ldpath;
1892
1893 _load_ld_cache_config(fname);
1894
1895 scan_l = scan_ul = scan_ull = false;
1896 if (array_cnt(ldpaths)) {
1897 array_for_each(ldpaths, n, ldpath) {
1898 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = true;
1899 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = true;
1900 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = true;
1901 }
1902 }
1903
1904 if (!scan_l) xarraypush_str(ldpaths, "/lib");
1905 if (!scan_ul) xarraypush_str(ldpaths, "/usr/lib");
1906 if (!scan_ull) xarraypush_str(ldpaths, "/usr/local/lib");
1907}
1549 1908
1550/* scan /etc/ld.so.conf for paths */ 1909/* scan /etc/ld.so.conf for paths */
1551static void scanelf_ldpath(void) 1910static void scanelf_ldpath(void)
1552{ 1911{
1553 char scan_l, scan_ul, scan_ull; 1912 size_t n;
1554 int i = 0; 1913 const char *ldpath;
1555 1914
1556 if (!ldpaths[0]) 1915 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]); 1916 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} 1917}
1573 1918
1574/* scan env PATH for paths */ 1919/* scan env PATH for paths */
1575static void scanelf_envpath(void) 1920static void scanelf_envpath(void)
1576{ 1921{
1587 } 1932 }
1588 1933
1589 free(path); 1934 free(path);
1590} 1935}
1591 1936
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 */ 1937/* 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" 1938#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZCBhV"
1595#define a_argument required_argument 1939#define a_argument required_argument
1596static struct option const long_opts[] = { 1940static struct option const long_opts[] = {
1597 {"path", no_argument, NULL, 'p'}, 1941 {"path", no_argument, NULL, 'p'},
1598 {"ldpath", no_argument, NULL, 'l'}, 1942 {"ldpath", no_argument, NULL, 'l'},
1943 {"use-ldpath",no_argument, NULL, 129},
1944 {"root", a_argument, NULL, 128},
1599 {"recursive", no_argument, NULL, 'R'}, 1945 {"recursive", no_argument, NULL, 'R'},
1600 {"mount", no_argument, NULL, 'm'}, 1946 {"mount", no_argument, NULL, 'm'},
1601 {"symlink", no_argument, NULL, 'y'}, 1947 {"symlink", no_argument, NULL, 'y'},
1602 {"archives", no_argument, NULL, 'A'}, 1948 {"archives", no_argument, NULL, 'A'},
1603 {"ldcache", no_argument, NULL, 'L'}, 1949 {"ldcache", no_argument, NULL, 'L'},
1617 {"gmatch", no_argument, NULL, 'g'}, 1963 {"gmatch", no_argument, NULL, 'g'},
1618 {"textrels", no_argument, NULL, 'T'}, 1964 {"textrels", no_argument, NULL, 'T'},
1619 {"etype", a_argument, NULL, 'E'}, 1965 {"etype", a_argument, NULL, 'E'},
1620 {"bits", a_argument, NULL, 'M'}, 1966 {"bits", a_argument, NULL, 'M'},
1621 {"endian", no_argument, NULL, 'D'}, 1967 {"endian", no_argument, NULL, 'D'},
1968 {"osabi", no_argument, NULL, 'I'},
1969 {"eabi", no_argument, NULL, 'Y'},
1622 {"perms", a_argument, NULL, 'O'}, 1970 {"perms", a_argument, NULL, 'O'},
1971 {"size", no_argument, NULL, 'Z'},
1623 {"all", no_argument, NULL, 'a'}, 1972 {"all", no_argument, NULL, 'a'},
1624 {"quiet", no_argument, NULL, 'q'}, 1973 {"quiet", no_argument, NULL, 'q'},
1625 {"verbose", no_argument, NULL, 'v'}, 1974 {"verbose", no_argument, NULL, 'v'},
1626 {"format", a_argument, NULL, 'F'}, 1975 {"format", a_argument, NULL, 'F'},
1627 {"from", a_argument, NULL, 'f'}, 1976 {"from", a_argument, NULL, 'f'},
1628 {"file", a_argument, NULL, 'o'}, 1977 {"file", a_argument, NULL, 'o'},
1978 {"nocolor", no_argument, NULL, 'C'},
1629 {"nobanner", no_argument, NULL, 'B'}, 1979 {"nobanner", no_argument, NULL, 'B'},
1630 {"help", no_argument, NULL, 'h'}, 1980 {"help", no_argument, NULL, 'h'},
1631 {"version", no_argument, NULL, 'V'}, 1981 {"version", no_argument, NULL, 'V'},
1632 {NULL, no_argument, NULL, 0x0} 1982 {NULL, no_argument, NULL, 0x0}
1633}; 1983};
1634 1984
1635static const char *opts_help[] = { 1985static const char * const opts_help[] = {
1636 "Scan all directories in PATH environment", 1986 "Scan all directories in PATH environment",
1637 "Scan all directories in /etc/ld.so.conf", 1987 "Scan all directories in /etc/ld.so.conf",
1988 "Use ld.so.conf to show full path (use with -r/-n)",
1989 "Root directory (use with -l or -p)",
1638 "Scan directories recursively", 1990 "Scan directories recursively",
1639 "Don't recursively cross mount points", 1991 "Don't recursively cross mount points",
1640 "Don't scan symlinks", 1992 "Don't scan symlinks",
1641 "Scan archives (.a files)", 1993 "Scan archives (.a files)",
1642 "Utilize ld.so.cache information (use with -r/-n)", 1994 "Utilize ld.so.cache to show full path (use with -r/-n)",
1643 "Try and 'fix' bad things (use with -r/-e)", 1995 "Try and 'fix' bad things (use with -r/-e)",
1644 "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n", 1996 "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
1645 "Print PaX markings", 1997 "Print PaX markings",
1646 "Print GNU_STACK/PT_LOAD markings", 1998 "Print GNU_STACK/PT_LOAD markings",
1647 "Print TEXTREL information", 1999 "Print TEXTREL information",
1651 "Print BIND information", 2003 "Print BIND information",
1652 "Print SONAME information", 2004 "Print SONAME information",
1653 "Find a specified symbol", 2005 "Find a specified symbol",
1654 "Find a specified section", 2006 "Find a specified section",
1655 "Find a specified library", 2007 "Find a specified library",
1656 "Use strncmp to match libraries. (use with -N)", 2008 "Use regex matching rather than string compare (use with -s)",
1657 "Locate cause of TEXTREL", 2009 "Locate cause of TEXTREL",
1658 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 2010 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1659 "Print only ELF files matching numeric bits", 2011 "Print only ELF files matching numeric bits",
1660 "Print Endianness", 2012 "Print Endianness",
2013 "Print OSABI",
2014 "Print EABI (EM_ARM Only)",
1661 "Print only ELF files matching octal permissions", 2015 "Print only ELF files matching octal permissions",
1662 "Print all scanned info (-x -e -t -r -b)\n", 2016 "Print ELF file size",
2017 "Print all useful/simple info\n",
1663 "Only output 'bad' things", 2018 "Only output 'bad' things",
1664 "Be verbose (can be specified more than once)", 2019 "Be verbose (can be specified more than once)",
1665 "Use specified format for output", 2020 "Use specified format for output",
1666 "Read input stream from a filename", 2021 "Read input stream from a filename",
1667 "Write output stream to a filename", 2022 "Write output stream to a filename",
2023 "Don't emit color in output",
1668 "Don't display the header", 2024 "Don't display the header",
1669 "Print this help and exit", 2025 "Print this help and exit",
1670 "Print version and exit", 2026 "Print version and exit",
1671 NULL 2027 NULL
1672}; 2028};
1676{ 2032{
1677 unsigned long i; 2033 unsigned long i;
1678 printf("* Scan ELF binaries for stuff\n\n" 2034 printf("* Scan ELF binaries for stuff\n\n"
1679 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0); 2035 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1680 printf("Options: -[%s]\n", PARSE_FLAGS); 2036 printf("Options: -[%s]\n", PARSE_FLAGS);
1681 for (i = 0; long_opts[i].name; ++i) 2037 for (i = 0; long_opts[i].name; ++i) {
2038 /* first output the short flag if it has one */
2039 if (long_opts[i].val > '~')
2040 printf(" ");
2041 else
2042 printf(" -%c, ", long_opts[i].val);
2043
2044 /* then the long flag */
1682 if (long_opts[i].has_arg == no_argument) 2045 if (long_opts[i].has_arg == no_argument)
1683 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 2046 printf("--%-14s", long_opts[i].name);
1684 long_opts[i].name, opts_help[i]);
1685 else 2047 else
1686 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 2048 printf("--%-7s <arg> ", long_opts[i].name);
1687 long_opts[i].name, opts_help[i]); 2049
2050 /* finally the help text */
2051 printf("* %s\n", opts_help[i]);
2052 }
1688 2053
1689 puts("\nFor more information, see the scanelf(1) manpage"); 2054 puts("\nFor more information, see the scanelf(1) manpage");
1690 exit(status); 2055 exit(status);
1691} 2056}
1692 2057
1702static int parseargs(int argc, char *argv[]) 2067static int parseargs(int argc, char *argv[])
1703{ 2068{
1704 int i; 2069 int i;
1705 const char *from_file = NULL; 2070 const char *from_file = NULL;
1706 int ret = 0; 2071 int ret = 0;
2072 char load_cache_config = 0;
1707 2073
1708 opterr = 0; 2074 opterr = 0;
1709 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 2075 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1710 switch (i) { 2076 switch (i) {
1711 2077
1719 case 'f': 2085 case 'f':
1720 if (from_file) warn("You prob don't want to specify -f twice"); 2086 if (from_file) warn("You prob don't want to specify -f twice");
1721 from_file = optarg; 2087 from_file = optarg;
1722 break; 2088 break;
1723 case 'E': 2089 case 'E':
1724 strncpy(match_etypes, optarg, sizeof(match_etypes)); 2090 match_etypes = optarg;
1725 break; 2091 break;
1726 case 'M': 2092 case 'M':
1727 match_bits = atoi(optarg); 2093 match_bits = atoi(optarg);
1728 if (match_bits == 0) { 2094 if (match_bits == 0) {
1729 if (strcmp(optarg, "ELFCLASS32") == 0) 2095 if (strcmp(optarg, "ELFCLASS32") == 0)
1731 if (strcmp(optarg, "ELFCLASS64") == 0) 2097 if (strcmp(optarg, "ELFCLASS64") == 0)
1732 match_bits = 64; 2098 match_bits = 64;
1733 } 2099 }
1734 break; 2100 break;
1735 case 'O': 2101 case 'O':
1736 if (sscanf(optarg, "%o", &match_perms) == (-1)) 2102 if (sscanf(optarg, "%o", &match_perms) == -1)
1737 match_bits = 0; 2103 match_bits = 0;
1738 break; 2104 break;
1739 case 'o': { 2105 case 'o': {
1740 if (freopen(optarg, "w", stdout) == NULL) 2106 if (freopen(optarg, "w", stdout) == NULL)
1741 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 2107 errp("Could not freopen(%s)", optarg);
1742 break; 2108 break;
1743 } 2109 }
1744 case 'k': 2110 case 'k':
1745 if (find_section) warn("You prob don't want to specify -k twice"); 2111 xarraypush_str(find_section_arr, optarg);
1746 find_section = optarg;
1747 break; 2112 break;
1748 case 's': { 2113 case 's': {
1749 if (find_sym) warn("You prob don't want to specify -s twice"); 2114 if (find_sym) warn("You prob don't want to specify -s twice");
1750 find_sym = optarg; 2115 find_sym = optarg;
1751 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1752 sprintf(versioned_symname, "%s@", find_sym);
1753 break; 2116 break;
1754 } 2117 }
1755 case 'N': { 2118 case 'N':
1756 if (find_lib) warn("You prob don't want to specify -N twice"); 2119 xarraypush_str(find_lib_arr, optarg);
1757 find_lib = optarg;
1758 break; 2120 break;
1759 }
1760
1761 case 'F': { 2121 case 'F': {
1762 if (out_format) warn("You prob don't want to specify -F twice"); 2122 if (out_format) warn("You prob don't want to specify -F twice");
1763 out_format = optarg; 2123 out_format = optarg;
1764 break; 2124 break;
1765 } 2125 }
1766 case 'z': { 2126 case 'z': {
1767 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 2127 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1768 size_t x; 2128 size_t x;
1769 2129
1770 for (x = 0 ; x < strlen(optarg); x++) { 2130 for (x = 0; x < strlen(optarg); x++) {
1771 switch(optarg[x]) { 2131 switch (optarg[x]) {
1772 case 'p': 2132 case 'p':
1773 case 'P': 2133 case 'P':
1774 do_pax_state(optarg[x], PAGEEXEC); 2134 do_pax_state(optarg[x], PAGEEXEC);
1775 break; 2135 break;
1776 case 's': 2136 case 's':
1804 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 2164 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1805 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 2165 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1806 setpax = flags; 2166 setpax = flags;
1807 break; 2167 break;
1808 } 2168 }
2169 case 'Z': show_size = 1; break;
1809 case 'g': g_match = 1; break; 2170 case 'g': g_match = 1; break;
1810 case 'L': use_ldcache = 1; break; 2171 case 'L': load_cache_config = use_ldcache = 1; break;
1811 case 'y': scan_symlink = 0; break; 2172 case 'y': scan_symlink = 0; break;
1812 case 'A': scan_archives = 1; break; 2173 case 'A': scan_archives = 1; break;
2174 case 'C': color_init(true); break;
1813 case 'B': show_banner = 0; break; 2175 case 'B': show_banner = 0; break;
1814 case 'l': scan_ldpath = 1; break; 2176 case 'l': load_cache_config = scan_ldpath = 1; break;
1815 case 'p': scan_envpath = 1; break; 2177 case 'p': scan_envpath = 1; break;
1816 case 'R': dir_recurse = 1; break; 2178 case 'R': dir_recurse = 1; break;
1817 case 'm': dir_crossmount = 0; break; 2179 case 'm': dir_crossmount = 0; break;
1818 case 'X': ++fix_elf; break; 2180 case 'X': ++fix_elf; break;
1819 case 'x': show_pax = 1; break; 2181 case 'x': show_pax = 1; break;
1827 case 'T': show_textrels = 1; break; 2189 case 'T': show_textrels = 1; break;
1828 case 'q': be_quiet = 1; break; 2190 case 'q': be_quiet = 1; break;
1829 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2191 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; 2192 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; 2193 case 'D': show_endian = 1; break;
2194 case 'I': show_osabi = 1; break;
2195 case 'Y': show_eabi = 1; break;
2196 case 128:
2197 root_fd = open(optarg, O_RDONLY|O_CLOEXEC);
2198 if (root_fd == -1)
2199 err("Could not open root: %s", optarg);
2200 break;
2201 case 129: load_cache_config = use_ldpath = 1; break;
1832 case ':': 2202 case ':':
1833 err("Option '%c' is missing parameter", optopt); 2203 err("Option '%c' is missing parameter", optopt);
1834 case '?': 2204 case '?':
1835 err("Unknown option '%c' or argument missing", optopt); 2205 err("Unknown option '%c' or argument missing", optopt);
1836 default: 2206 default:
1837 err("Unhandled option '%c'; please report this", i); 2207 err("Unhandled option '%c'; please report this", i);
1838 } 2208 }
1839 } 2209 }
1840 if (show_textrels && be_verbose) { 2210 if (show_textrels && be_verbose)
1841 if (which("objdump") != NULL) 2211 has_objdump = bin_in_path("objdump");
1842 has_objdump = 1; 2212 /* flatten arrays for display */
1843 } 2213 if (array_cnt(find_lib_arr))
2214 find_lib = array_flatten_str(find_lib_arr);
2215 if (array_cnt(find_section_arr))
2216 find_section = array_flatten_str(find_section_arr);
1844 /* let the format option override all other options */ 2217 /* let the format option override all other options */
1845 if (out_format) { 2218 if (out_format) {
1846 show_pax = show_phdr = show_textrel = show_rpath = \ 2219 show_pax = show_phdr = show_textrel = show_rpath = \
1847 show_needed = show_interp = show_bind = show_soname = \ 2220 show_needed = show_interp = show_bind = show_soname = \
1848 show_textrels = show_perms = show_endian = 0; 2221 show_textrels = show_perms = show_endian = show_size = \
2222 show_osabi = show_eabi = 0;
1849 for (i = 0; out_format[i]; ++i) { 2223 for (i = 0; out_format[i]; ++i) {
1850 if (!IS_MODIFIER(out_format[i])) continue; 2224 if (!IS_MODIFIER(out_format[i])) continue;
1851 2225
1852 switch (out_format[++i]) { 2226 switch (out_format[++i]) {
1853 case '+': break; 2227 case '+': break;
1860 case 's': break; 2234 case 's': break;
1861 case 'N': break; 2235 case 'N': break;
1862 case 'o': break; 2236 case 'o': break;
1863 case 'a': break; 2237 case 'a': break;
1864 case 'M': break; 2238 case 'M': break;
2239 case 'Z': show_size = 1; break;
1865 case 'D': show_endian = 1; break; 2240 case 'D': show_endian = 1; break;
2241 case 'I': show_osabi = 1; break;
2242 case 'Y': show_eabi = 1; break;
1866 case 'O': show_perms = 1; break; 2243 case 'O': show_perms = 1; break;
1867 case 'x': show_pax = 1; break; 2244 case 'x': show_pax = 1; break;
1868 case 'e': show_phdr = 1; break; 2245 case 'e': show_phdr = 1; break;
1869 case 't': show_textrel = 1; break; 2246 case 't': show_textrel = 1; break;
1870 case 'r': show_rpath = 1; break; 2247 case 'r': show_rpath = 1; break;
1872 case 'i': show_interp = 1; break; 2249 case 'i': show_interp = 1; break;
1873 case 'b': show_bind = 1; break; 2250 case 'b': show_bind = 1; break;
1874 case 'S': show_soname = 1; break; 2251 case 'S': show_soname = 1; break;
1875 case 'T': show_textrels = 1; break; 2252 case 'T': show_textrels = 1; break;
1876 default: 2253 default:
1877 err("Invalid format specifier '%c' (byte %i)", 2254 err("invalid format specifier '%c' (byte %i)",
1878 out_format[i], i+1); 2255 out_format[i], i+1);
1879 } 2256 }
1880 } 2257 }
1881 2258
1882 /* construct our default format */ 2259 /* construct our default format */
1883 } else { 2260 } else {
1884 size_t fmt_len = 30; 2261 size_t fmt_len = 30;
1885 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2262 out_format = xmalloc(sizeof(char) * fmt_len);
2263 *out_format = '\0';
1886 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2264 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1887 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 2265 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1888 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len); 2266 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
2267 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
1889 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len); 2268 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
2269 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
2270 if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1890 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2271 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1891 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2272 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1892 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2273 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1893 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2274 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1894 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2275 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1901 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 2282 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1902 } 2283 }
1903 if (be_verbose > 2) printf("Format: %s\n", out_format); 2284 if (be_verbose > 2) printf("Format: %s\n", out_format);
1904 2285
1905 /* now lets actually do the scanning */ 2286 /* now lets actually do the scanning */
1906 if (scan_ldpath || use_ldcache) 2287 if (load_cache_config)
1907 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG); 2288 load_ld_cache_config(__PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1908 if (scan_ldpath) scanelf_ldpath(); 2289 if (scan_ldpath) scanelf_ldpath();
1909 if (scan_envpath) scanelf_envpath(); 2290 if (scan_envpath) scanelf_envpath();
1910 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath) 2291 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1911 from_file = "-"; 2292 from_file = "-";
1912 if (from_file) { 2293 if (from_file) {
1919 search_path = argv[optind++]; 2300 search_path = argv[optind++];
1920 ret = scanelf_dir(search_path); 2301 ret = scanelf_dir(search_path);
1921 } 2302 }
1922 2303
1923 /* clean up */ 2304 /* clean up */
1924 free(versioned_symname);
1925 for (i = 0; ldpaths[i]; ++i)
1926 free(ldpaths[i]); 2305 xarrayfree(ldpaths);
2306 xarrayfree(find_lib_arr);
2307 xarrayfree(find_section_arr);
2308 free(find_lib);
2309 free(find_section);
1927 2310
1928 if (ldcache != 0) 2311 if (ldcache != 0)
1929 munmap(ldcache, ldcache_size); 2312 munmap(ldcache, ldcache_size);
1930 return ret; 2313 return ret;
1931} 2314}
1964 return envvals; 2347 return envvals;
1965} 2348}
1966 2349
1967static void parseenv(void) 2350static void parseenv(void)
1968{ 2351{
2352 color_init(false);
1969 qa_textrels = get_split_env("QA_TEXTRELS"); 2353 qa_textrels = get_split_env("QA_TEXTRELS");
1970 qa_execstack = get_split_env("QA_EXECSTACK"); 2354 qa_execstack = get_split_env("QA_EXECSTACK");
1971 qa_wx_load = get_split_env("QA_WX_LOAD"); 2355 qa_wx_load = get_split_env("QA_WX_LOAD");
1972} 2356}
1973 2357
1978 free(qa_textrels); 2362 free(qa_textrels);
1979 free(qa_execstack); 2363 free(qa_execstack);
1980 free(qa_wx_load); 2364 free(qa_wx_load);
1981} 2365}
1982#endif 2366#endif
1983
1984 2367
1985int main(int argc, char *argv[]) 2368int main(int argc, char *argv[])
1986{ 2369{
1987 int ret; 2370 int ret;
1988 if (argc < 2) 2371 if (argc < 2)
1991 ret = parseargs(argc, argv); 2374 ret = parseargs(argc, argv);
1992 fclose(stdout); 2375 fclose(stdout);
1993#ifdef __PAX_UTILS_CLEANUP 2376#ifdef __PAX_UTILS_CLEANUP
1994 cleanup(); 2377 cleanup();
1995 warn("The calls to add/delete heap should be off:\n" 2378 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" 2379 "\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"); 2380 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1998#endif 2381#endif
1999 return ret; 2382 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} 2383}
2047 2384
2048/* Match filename against entries in matchlist, return TRUE 2385/* Match filename against entries in matchlist, return TRUE
2049 * if the file is listed */ 2386 * if the file is listed */
2050static int file_matches_list(const char *filename, char **matchlist) 2387static int file_matches_list(const char *filename, char **matchlist)

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