/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.125 Revision 1.229
1/* 1/*
2 * Copyright 2003-2006 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 1.125 2006/02/16 05:06:14 solar Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $
5 * 5 *
6 * Copyright 2003-2006 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2006 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 1.229 2011/09/27 19:29:19 vapier Exp $";
11const char argv0[] = "scanelf";
12
10#include "paxinc.h" 13#include "paxinc.h"
11 14
12static const char *rcsid = "$Id: scanelf.c,v 1.125 2006/02/16 05:06:14 solar Exp $";
13#define argv0 "scanelf"
14
15#define IS_MODIFIER(c) (c == '%' || c == '#') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
16
17
18 16
19/* prototypes */ 17/* prototypes */
20static int scanelf_elfobj(elfobj *elf); 18static int file_matches_list(const char *filename, char **matchlist);
21static int scanelf_elf(const char *filename, int fd, size_t len);
22static int scanelf_archive(const char *filename, int fd, size_t len);
23static void scanelf_file(const char *filename);
24static void scanelf_dir(const char *path);
25static void scanelf_ldpath(void);
26static void scanelf_envpath(void);
27static void usage(int status);
28static void parseargs(int argc, char *argv[]);
29static char *xstrdup(const char *s);
30static void *xmalloc(size_t size);
31static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
32#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
33static inline void xchrcat(char **dst, const char append, size_t *curr_len);
34 19
35/* variables to control behavior */ 20/* variables to control behavior */
36static char match_etypes[126] = ""; 21static char *match_etypes = NULL;
37static char *ldpaths[256]; 22static array_t _ldpaths = array_init_decl, *ldpaths = &_ldpaths;
38static char scan_ldpath = 0; 23static char scan_ldpath = 0;
39static char scan_envpath = 0; 24static char scan_envpath = 0;
40static char scan_symlink = 1; 25static char scan_symlink = 1;
41static char scan_archives = 0; 26static char scan_archives = 0;
42static char dir_recurse = 0; 27static char dir_recurse = 0;
43static char dir_crossmount = 1; 28static char dir_crossmount = 1;
44static char show_pax = 0; 29static char show_pax = 0;
30static char show_perms = 0;
31static char show_size = 0;
45static char show_phdr = 0; 32static char show_phdr = 0;
46static char show_textrel = 0; 33static char show_textrel = 0;
47static char show_rpath = 0; 34static char show_rpath = 0;
48static char show_needed = 0; 35static char show_needed = 0;
49static char show_interp = 0; 36static char show_interp = 0;
50static char show_bind = 0; 37static char show_bind = 0;
51static char show_soname = 0; 38static char show_soname = 0;
52static char show_textrels = 0; 39static char show_textrels = 0;
53static char show_banner = 1; 40static char show_banner = 1;
41static char show_endian = 0;
42static char show_osabi = 0;
43static char show_eabi = 0;
54static char be_quiet = 0; 44static char be_quiet = 0;
55static char be_verbose = 0; 45static char be_verbose = 0;
56static char be_very_quiet = 0; 46static char be_wewy_wewy_quiet = 0;
57static char *find_sym = NULL, *versioned_symname = NULL; 47static char be_semi_verbose = 0;
48static char *find_sym = NULL;
58static char *find_lib = NULL; 49static char *find_lib = NULL;
50static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
59static char *find_section = NULL; 51static char *find_section = NULL;
52static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
60static char *out_format = NULL; 53static char *out_format = NULL;
61static char *search_path = NULL; 54static char *search_path = NULL;
62static char fix_elf = 0; 55static char fix_elf = 0;
63static char gmatch = 0; 56static char g_match = 0;
64static char use_ldcache = 0; 57static char use_ldcache = 0;
65 58
59static char **qa_textrels = NULL;
60static char **qa_execstack = NULL;
61static char **qa_wx_load = NULL;
62static char *root;
63
66int match_bits = 0; 64static int match_bits = 0;
67caddr_t ldcache = 0; 65static unsigned int match_perms = 0;
66static void *ldcache = NULL;
68size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
68static unsigned long setpax = 0UL;
69
70static int has_objdump = 0;
71
72/* find the path to a file by name */
73static char *which(const char *fname)
74{
75 static char fullpath[__PAX_UTILS_PATH_MAX];
76 char *path, *p;
77
78 path = getenv("PATH");
79 if (!path)
80 return NULL;
81
82 path = xstrdup(path);
83 while ((p = strrchr(path, ':')) != NULL) {
84 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
85 *p = 0;
86 if (access(fullpath, R_OK) != -1) {
87 free(path);
88 return fullpath;
89 }
90 }
91 free(path);
92 return NULL;
93}
94
95/* 1 on failure. 0 otherwise */
96static int rematch(const char *regex, const char *match, int cflags)
97{
98 regex_t preg;
99 int ret;
100
101 if ((match == NULL) || (regex == NULL))
102 return EXIT_FAILURE;
103
104 if ((ret = regcomp(&preg, regex, cflags))) {
105 char err[256];
106
107 if (regerror(ret, &preg, err, sizeof(err)))
108 fprintf(stderr, "regcomp failed: %s", err);
109 else
110 fprintf(stderr, "regcomp failed");
111
112 return EXIT_FAILURE;
113 }
114 ret = regexec(&preg, match, 0, NULL, 0);
115 regfree(&preg);
116
117 return ret;
118}
69 119
70/* sub-funcs for scanelf_file() */ 120/* sub-funcs for scanelf_file() */
71static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 121static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
72{ 122{
73 /* find the best SHT_DYNSYM and SHT_STRTAB sections */ 123 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
124
125 /* debug sections */
126 void *symtab = elf_findsecbyname(elf, ".symtab");
127 void *strtab = elf_findsecbyname(elf, ".strtab");
128 /* runtime sections */
129 void *dynsym = elf_findsecbyname(elf, ".dynsym");
130 void *dynstr = elf_findsecbyname(elf, ".dynstr");
131
74#define GET_SYMTABS(B) \ 132#define GET_SYMTABS(B) \
75 if (elf->elf_class == ELFCLASS ## B) { \ 133 if (elf->elf_class == ELFCLASS ## B) { \
76 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
77 /* debug sections */ \
78 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
79 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
80 /* runtime sections */ \
81 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
82 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
83 if (symtab && dynsym) { \ 134 if (symtab && dynsym) { \
135 Elf ## B ## _Shdr *esymtab = symtab; \
136 Elf ## B ## _Shdr *edynsym = dynsym; \
84 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 137 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
85 } else { \ 138 } else \
86 *sym = (void*)(symtab ? symtab : dynsym); \ 139 *sym = symtab ? symtab : dynsym; \
87 } \
88 if (strtab && dynstr) { \ 140 if (strtab && dynstr) { \
141 Elf ## B ## _Shdr *estrtab = strtab; \
142 Elf ## B ## _Shdr *edynstr = dynstr; \
89 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 143 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
90 } else { \ 144 } else \
91 *tab = (void*)(strtab ? strtab : dynstr); \ 145 *tab = strtab ? strtab : dynstr; \
92 } \
93 } 146 }
94 GET_SYMTABS(32) 147 GET_SYMTABS(32)
95 GET_SYMTABS(64) 148 GET_SYMTABS(64)
96} 149}
150
97static char *scanelf_file_pax(elfobj *elf, char *found_pax) 151static char *scanelf_file_pax(elfobj *elf, char *found_pax)
98{ 152{
99 static char ret[7]; 153 static char ret[7];
100 unsigned long i, shown; 154 unsigned long i, shown;
101 155
110 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 164 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
111 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 165 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
112 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 166 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
113 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \ 167 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \
114 continue; \ 168 continue; \
115 if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \ 169 if (fix_elf && setpax) { \
170 /* set the paxctl flags */ \
171 ESET(phdr[i].p_flags, setpax); \
172 } \
173 if (be_quiet && (EGET(phdr[i].p_flags) == (PF_NOEMUTRAMP | PF_NORANDEXEC))) \
116 continue; \ 174 continue; \
117 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \ 175 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \
118 *found_pax = 1; \ 176 *found_pax = 1; \
119 ++shown; \ 177 ++shown; \
120 break; \ 178 break; \
122 } 180 }
123 SHOW_PAX(32) 181 SHOW_PAX(32)
124 SHOW_PAX(64) 182 SHOW_PAX(64)
125 } 183 }
126 184
185 if (fix_elf && setpax) {
186 /* set the chpax settings */
187 if (elf->elf_class == ELFCLASS32) {
188 if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC)
189 ESET(EHDR32(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
190 } else {
191 if (EHDR64(elf->ehdr)->e_type == ET_DYN || EHDR64(elf->ehdr)->e_type == ET_EXEC)
192 ESET(EHDR64(elf->ehdr)->e_ident[EI_PAX], pax_pf2hf_flags(setpax));
193 }
194 }
195
127 /* fall back to EI_PAX if no PT_PAX was found */ 196 /* fall back to EI_PAX if no PT_PAX was found */
128 if (!*ret) { 197 if (!*ret) {
129 static char *paxflags; 198 static char *paxflags;
130 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); 199 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
131 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) { 200 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
132 *found_pax = 1; 201 *found_pax = 1;
133 return (be_very_quiet ? NULL : paxflags); 202 return (be_wewy_wewy_quiet ? NULL : paxflags);
134 } 203 }
135 strncpy(ret, paxflags, sizeof(ret)); 204 strncpy(ret, paxflags, sizeof(ret));
136 } 205 }
137 206
138 if (be_very_quiet || (be_quiet && !shown)) 207 if (be_wewy_wewy_quiet || (be_quiet && !shown))
139 return NULL; 208 return NULL;
140 else 209 else
141 return ret; 210 return ret;
142} 211}
143 212
164 uint32_t flags, check_flags; \ 233 uint32_t flags, check_flags; \
165 if (elf->phdr != NULL) { \ 234 if (elf->phdr != NULL) { \
166 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 235 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
167 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \ 236 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
168 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 237 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
238 if (multi_stack++) \
169 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ 239 warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
240 if (file_matches_list(elf->filename, qa_execstack)) \
241 continue; \
170 found = found_phdr; \ 242 found = found_phdr; \
171 offset = 0; \ 243 offset = 0; \
172 check_flags = PF_X; \ 244 check_flags = PF_X; \
173 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \ 245 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
246 if (multi_relro++) \
174 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 247 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
175 found = found_relro; \ 248 found = found_relro; \
176 offset = 4; \ 249 offset = 4; \
177 check_flags = PF_X; \ 250 check_flags = PF_X; \
178 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 251 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
179 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \ 252 if (EGET(ehdr->e_type) == ET_DYN || EGET(ehdr->e_type) == ET_EXEC) \
253 if (multi_load++ > max_pt_load) \
180 if (multi_load++ > max_pt_load) warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \ 254 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
255 if (file_matches_list(elf->filename, qa_wx_load)) \
256 continue; \
181 found = found_load; \ 257 found = found_load; \
182 offset = 8; \ 258 offset = 8; \
183 check_flags = PF_W|PF_X; \ 259 check_flags = PF_W|PF_X; \
184 } else \ 260 } else \
185 continue; \ 261 continue; \
186 flags = EGET(phdr[i].p_flags); \ 262 flags = EGET(phdr[i].p_flags); \
187 if (be_quiet && ((flags & check_flags) != check_flags)) \ 263 if (be_quiet && ((flags & check_flags) != check_flags)) \
188 continue; \ 264 continue; \
189 if (fix_elf && ((flags & PF_X) != flags)) { \ 265 if ((EGET(phdr[i].p_type) != PT_LOAD) && (fix_elf && ((flags & PF_X) != flags))) { \
190 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \ 266 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \
191 ret[3] = ret[7] = '!'; \ 267 ret[3] = ret[7] = '!'; \
192 flags = EGET(phdr[i].p_flags); \ 268 flags = EGET(phdr[i].p_flags); \
193 } \ 269 } \
194 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \ 270 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
198 } else if (elf->shdr != NULL) { \ 274 } else if (elf->shdr != NULL) { \
199 /* no program headers which means this is prob an object file */ \ 275 /* no program headers which means this is prob an object file */ \
200 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 276 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
201 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 277 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
202 char *str; \ 278 char *str; \
203 if ((void*)strtbl > (void*)elf->data_end) \ 279 if ((void*)strtbl > elf->data_end) \
204 goto skip_this_shdr##B; \ 280 goto skip_this_shdr##B; \
205 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 281 check_flags = SHF_WRITE|SHF_EXECINSTR; \
206 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 282 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
207 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 283 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
208 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 284 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
222 break; \ 298 break; \
223 } \ 299 } \
224 } \ 300 } \
225 skip_this_shdr##B: \ 301 skip_this_shdr##B: \
226 if (!multi_stack) { \ 302 if (!multi_stack) { \
303 if (file_matches_list(elf->filename, qa_execstack)) \
304 return NULL; \
227 *found_phdr = 1; \ 305 *found_phdr = 1; \
228 shown = 1; \ 306 shown = 1; \
229 memcpy(ret, "!WX", 3); \ 307 memcpy(ret, "!WX", 3); \
230 } \ 308 } \
231 } \ 309 } \
232 } 310 }
233 SHOW_PHDR(32) 311 SHOW_PHDR(32)
234 SHOW_PHDR(64) 312 SHOW_PHDR(64)
235 313
236 if (be_very_quiet || (be_quiet && !shown)) 314 if (be_wewy_wewy_quiet || (be_quiet && !shown))
237 return NULL; 315 return NULL;
238 else 316 else
239 return ret; 317 return ret;
240} 318}
319
320/*
321 * See if this ELF contains a DT_TEXTREL tag in any of its
322 * PT_DYNAMIC sections.
323 */
241static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 324static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
242{ 325{
243 static const char *ret = "TEXTREL"; 326 static const char *ret = "TEXTREL";
244 unsigned long i; 327 unsigned long i;
245 328
246 if (!show_textrel && !show_textrels) return NULL; 329 if (!show_textrel && !show_textrels) return NULL;
330
331 if (file_matches_list(elf->filename, qa_textrels)) return NULL;
247 332
248 if (elf->phdr) { 333 if (elf->phdr) {
249#define SHOW_TEXTREL(B) \ 334#define SHOW_TEXTREL(B) \
250 if (elf->elf_class == ELFCLASS ## B) { \ 335 if (elf->elf_class == ELFCLASS ## B) { \
251 Elf ## B ## _Dyn *dyn; \ 336 Elf ## B ## _Dyn *dyn; \
252 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 337 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
253 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 338 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
254 Elf ## B ## _Off offset; \ 339 Elf ## B ## _Off offset; \
255 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 340 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
256 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 341 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
257 offset = EGET(phdr[i].p_offset); \ 342 offset = EGET(phdr[i].p_offset); \
258 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 343 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
259 dyn = DYN ## B (elf->data + offset); \ 344 dyn = DYN ## B (elf->vdata + offset); \
260 while (EGET(dyn->d_tag) != DT_NULL) { \ 345 while (EGET(dyn->d_tag) != DT_NULL) { \
261 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 346 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
262 *found_textrel = 1; \ 347 *found_textrel = 1; \
263 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 348 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
264 return (be_very_quiet ? NULL : ret); \ 349 return (be_wewy_wewy_quiet ? NULL : ret); \
265 } \ 350 } \
266 ++dyn; \ 351 ++dyn; \
267 } \ 352 } \
268 } } 353 } }
269 SHOW_TEXTREL(32) 354 SHOW_TEXTREL(32)
270 SHOW_TEXTREL(64) 355 SHOW_TEXTREL(64)
271 } 356 }
272 357
273 if (be_quiet || be_very_quiet) 358 if (be_quiet || be_wewy_wewy_quiet)
274 return NULL; 359 return NULL;
275 else 360 else
276 return " - "; 361 return " - ";
277} 362}
363
364/*
365 * Scan the .text section to see if there are any relocations in it.
366 * Should rewrite this to check PT_LOAD sections that are marked
367 * Executable rather than the section named '.text'.
368 */
278static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) 369static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
279{ 370{
280 unsigned long s, r, rmax; 371 unsigned long s, r, rmax;
281 void *symtab_void, *strtab_void, *text_void; 372 void *symtab_void, *strtab_void, *text_void;
282 373
303 Elf ## B ## _Rela *rela; \ 394 Elf ## B ## _Rela *rela; \
304 /* search the section headers for relocations */ \ 395 /* search the section headers for relocations */ \
305 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 396 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
306 uint32_t sh_type = EGET(shdr[s].sh_type); \ 397 uint32_t sh_type = EGET(shdr[s].sh_type); \
307 if (sh_type == SHT_REL) { \ 398 if (sh_type == SHT_REL) { \
308 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 399 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
309 rela = NULL; \ 400 rela = NULL; \
310 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 401 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
311 } else if (sh_type == SHT_RELA) { \ 402 } else if (sh_type == SHT_RELA) { \
312 rel = NULL; \ 403 rel = NULL; \
313 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 404 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
314 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 405 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
315 } else \ 406 } else \
316 continue; \ 407 continue; \
317 /* now see if any of the relocs are in the .text */ \ 408 /* now see if any of the relocs are in the .text */ \
318 for (r = 0; r < rmax; ++r) { \ 409 for (r = 0; r < rmax; ++r) { \
333 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 424 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
334 if (be_verbose <= 2) continue; \ 425 if (be_verbose <= 2) continue; \
335 } else \ 426 } else \
336 *found_textrels = 1; \ 427 *found_textrels = 1; \
337 /* locate this relocation symbol name */ \ 428 /* locate this relocation symbol name */ \
338 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 429 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
339 if ((void*)sym > (void*)elf->data_end) { \ 430 if ((void*)sym > elf->data_end) { \
340 warn("%s: corrupt ELF symbol", elf->filename); \ 431 warn("%s: corrupt ELF symbol", elf->filename); \
341 continue; \ 432 continue; \
342 } \ 433 } \
343 sym_max = ELF ## B ## _R_SYM(r_info); \ 434 sym_max = ELF ## B ## _R_SYM(r_info); \
344 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 435 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
347 sym = NULL; \ 438 sym = NULL; \
348 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 439 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
349 /* show the raw details about this reloc */ \ 440 /* show the raw details about this reloc */ \
350 printf(" %s: ", elf->base_filename); \ 441 printf(" %s: ", elf->base_filename); \
351 if (sym && sym->st_name) \ 442 if (sym && sym->st_name) \
352 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \ 443 printf("%s", elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
353 else \ 444 else \
354 printf("(memory/fake?)"); \ 445 printf("(memory/data?)"); \
355 printf(" [0x%lX]", (unsigned long)r_offset); \ 446 printf(" [0x%lX]", (unsigned long)r_offset); \
356 /* now try to find the closest symbol that this rel is probably in */ \ 447 /* now try to find the closest symbol that this rel is probably in */ \
357 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 448 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
358 func = NULL; \ 449 func = NULL; \
359 offset_tmp = 0; \ 450 offset_tmp = 0; \
360 while (sym_max--) { \ 451 while (sym_max--) { \
361 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \ 452 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
362 func = sym; \ 453 func = sym; \
363 offset_tmp = EGET(sym->st_value); \ 454 offset_tmp = EGET(sym->st_value); \
364 } \ 455 } \
365 ++sym; \ 456 ++sym; \
366 } \ 457 } \
367 printf(" in "); \ 458 printf(" in "); \
368 if (func && func->st_name) \ 459 if (func && func->st_name) { \
369 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \ 460 const char *func_name = elf->data + EGET(strtab->sh_offset) + EGET(func->st_name); \
461 if (r_offset > EGET(func->st_size)) \
462 printf("(optimized out: previous %s)", func_name); \
370 else \ 463 else \
371 printf("(NULL: fake?)"); \ 464 printf("%s", func_name); \
465 } else \
466 printf("(optimized out)"); \
372 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 467 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
468 if (be_verbose && has_objdump) { \
469 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
470 char *sysbuf; \
471 size_t syslen; \
472 int sysret; \
473 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"; \
474 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
475 sysbuf = xmalloc(syslen); \
476 if (end_addr < r_offset) \
477 /* not uncommon when things are optimized out */ \
478 end_addr = r_offset + 0x100; \
479 snprintf(sysbuf, syslen, sysfmt, \
480 (unsigned long)offset_tmp, \
481 (unsigned long)end_addr, \
482 elf->filename, \
483 (unsigned long)r_offset); \
484 fflush(stdout); \
485 sysret = system(sysbuf); \
486 fflush(stdout); \
487 free(sysbuf); \
488 } \
373 } \ 489 } \
374 } } 490 } }
375 SHOW_TEXTRELS(32) 491 SHOW_TEXTRELS(32)
376 SHOW_TEXTRELS(64) 492 SHOW_TEXTRELS(64)
377 } 493 }
379 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename); 495 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
380 496
381 return NULL; 497 return NULL;
382} 498}
383 499
384static void rpath_security_checks(elfobj *, char *, const char *);
385static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type) 500static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
386{ 501{
387 struct stat st; 502 struct stat st;
388 switch (*item) { 503 switch (*item) {
389 case '/': break; 504 case '/': break;
395 warnf("Security problem NULL %s in %s", dt_type, elf->filename); 510 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
396 break; 511 break;
397 case '$': 512 case '$':
398 if (fstat(elf->fd, &st) != -1) 513 if (fstat(elf->fd, &st) != -1)
399 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 514 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
400 warnf("Security problem with %s='%s' in %s with mode set of %o", 515 warnf("Security problem with %s='%s' in %s with mode set of %o",
401 dt_type, item, elf->filename, st.st_mode & 07777); 516 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
402 break; 517 break;
403 default: 518 default:
404 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename); 519 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
405 break; 520 break;
406 } 521 }
407} 522}
408static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) 523static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
409{ 524{
410 unsigned long i, s; 525 unsigned long i;
411 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
412 void *strtbl_void; 527 void *strtbl_void;
413 528
414 if (!show_rpath) return; 529 if (!show_rpath) return;
415 530
426 Elf ## B ## _Off offset; \ 541 Elf ## B ## _Off offset; \
427 Elf ## B ## _Xword word; \ 542 Elf ## B ## _Xword word; \
428 /* Scan all the program headers */ \ 543 /* Scan all the program headers */ \
429 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 544 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
430 /* Just scan dynamic headers */ \ 545 /* Just scan dynamic headers */ \
431 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 546 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
432 offset = EGET(phdr[i].p_offset); \ 547 offset = EGET(phdr[i].p_offset); \
433 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 548 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
434 /* Just scan dynamic RPATH/RUNPATH headers */ \ 549 /* Just scan dynamic RPATH/RUNPATH headers */ \
435 dyn = DYN ## B (elf->data + offset); \ 550 dyn = DYN ## B (elf->vdata + offset); \
436 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 551 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
437 if (word == DT_RPATH) { \ 552 if (word == DT_RPATH) { \
438 r = &rpath; \ 553 r = &rpath; \
439 } else if (word == DT_RUNPATH) { \ 554 } else if (word == DT_RUNPATH) { \
440 r = &runpath; \ 555 r = &runpath; \
444 } \ 559 } \
445 /* Verify the memory is somewhat sane */ \ 560 /* Verify the memory is somewhat sane */ \
446 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 561 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
447 if (offset < (Elf ## B ## _Off)elf->len) { \ 562 if (offset < (Elf ## B ## _Off)elf->len) { \
448 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 563 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
449 *r = (char*)(elf->data + offset); \ 564 *r = elf->data + offset; \
450 /* cache the length in case we need to nuke this section later on */ \ 565 /* cache the length in case we need to nuke this section later on */ \
451 if (fix_elf) \ 566 if (fix_elf) \
452 offset = strlen(*r); \ 567 offset = strlen(*r); \
453 /* If quiet, don't output paths in ld.so.conf */ \ 568 /* If quiet, don't output paths in ld.so.conf */ \
454 if (be_quiet) { \ 569 if (be_quiet) { \
460 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
461 while (start) { \ 576 while (start) { \
462 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
463 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
464 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
465 if (use_ldcache) \ 580 if (use_ldcache) { \
466 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
467 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
468 *r = end; \ 585 *r = end; \
469 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
470 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
471 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
472 (*r)++; \ 589 (*r)++; \
473 break; \ 590 break; \
474 } \ 591 } \
592 } \
475 if (!*r || !end) \ 593 if (!*r || !end) \
476 break; \ 594 break; \
477 else \ 595 else \
478 start = start + len + 1; \ 596 start = start + len + 1; \
479 } \ 597 } \
526 } } 644 } }
527 SHOW_RPATH(32) 645 SHOW_RPATH(32)
528 SHOW_RPATH(64) 646 SHOW_RPATH(64)
529 } 647 }
530 648
531 if (be_very_quiet) return; 649 if (be_wewy_wewy_quiet) return;
532 650
533 if (rpath && runpath) { 651 if (rpath && runpath) {
534 if (!strcmp(rpath, runpath)) { 652 if (!strcmp(rpath, runpath)) {
535 xstrcat(ret, runpath, ret_len); 653 xstrcat(ret, runpath, ret_len);
536 } else { 654 } else {
564#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
565#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
566#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
567#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
568 686
569static char *lookup_cache_lib(elfobj *, char *); 687#if defined(__GLIBC__) || defined(__UCLIBC__)
688
570static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
571{ 690{
572 int fd = 0; 691 int fd;
573 char *strs; 692 char *strs;
574 static char buf[__PAX_UTILS_PATH_MAX] = ""; 693 static char buf[__PAX_UTILS_PATH_MAX] = "";
575 const char *cachefile = "/etc/ld.so.cache"; 694 const char cachefile[] = "/etc/ld.so.cache";
576 struct stat st; 695 struct stat st;
577 696
578 typedef struct { 697 typedef struct {
579 char magic[LDSO_CACHE_MAGIC_LEN]; 698 char magic[LDSO_CACHE_MAGIC_LEN];
580 char version[LDSO_CACHE_VER_LEN]; 699 char version[LDSO_CACHE_VER_LEN];
590 libentry_t *libent; 709 libentry_t *libent;
591 710
592 if (fname == NULL) 711 if (fname == NULL)
593 return NULL; 712 return NULL;
594 713
595 if (ldcache == 0) { 714 if (ldcache == NULL) {
596 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1) 715 if (stat(cachefile, &st))
716 return NULL;
717
718 fd = open(cachefile, O_RDONLY);
719 if (fd == -1)
597 return NULL; 720 return NULL;
598 721
599 /* cache these values so we only map/unmap the cache file once */ 722 /* cache these values so we only map/unmap the cache file once */
600 ldcache_size = st.st_size; 723 ldcache_size = st.st_size;
601 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 724 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
602
603 close(fd); 725 close(fd);
604 726
605 if (ldcache == (caddr_t)-1) { 727 if (ldcache == MAP_FAILED) {
606 ldcache = 0; 728 ldcache = NULL;
607 return NULL; 729 return NULL;
608 } 730 }
609 731
610 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN)) 732 if (memcmp(header->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN) ||
733 memcmp(header->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
734 {
735 munmap(ldcache, ldcache_size);
736 ldcache = NULL;
611 return NULL; 737 return NULL;
612 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
613 return NULL;
614 } 738 }
739 } else
740 header = ldcache;
615 741
616 header = (header_t *) ldcache;
617 libent = (libentry_t *) (ldcache + sizeof(header_t)); 742 libent = ldcache + sizeof(header_t);
618 strs = (char *) &libent[header->nlibs]; 743 strs = (char *) &libent[header->nlibs];
619 744
620 for (fd = 0; fd < header->nlibs; fd++) { 745 for (fd = 0; fd < header->nlibs; ++fd) {
621 /* this should be more fine grained, but for now we assume that 746 /* This should be more fine grained, but for now we assume that
622 * diff arches will not be cached together. and we ignore the 747 * diff arches will not be cached together, and we ignore the
623 * the different multilib mips cases. */ 748 * the different multilib mips cases.
749 */
624 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 750 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
625 continue; 751 continue;
626 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 752 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
627 continue; 753 continue;
628 754
629 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 755 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
630 continue; 756 continue;
757
758 /* Return first hit because that is how the ldso rolls */
631 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 759 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
760 break;
632 } 761 }
762
633 return buf; 763 return buf;
634} 764}
635 765
766#elif defined(__NetBSD__)
767static char *lookup_cache_lib(elfobj *elf, char *fname)
768{
769 static char buf[__PAX_UTILS_PATH_MAX] = "";
770 static struct stat st;
771 size_t n;
772 char *ldpath;
773
774 array_for_each(ldpath, n, ldpath) {
775 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", ldpath, fname) >= sizeof(buf))
776 continue; /* if the pathname is too long, or something went wrong, ignore */
777
778 if (stat(buf, &st) != 0)
779 continue; /* if the lib doesn't exist in *ldpath, look further */
780
781 /* NetBSD doesn't actually do sanity checks, it just loads the file
782 * and if that doesn't work, continues looking in other directories.
783 * This cannot easily be safely emulated, unfortunately. For now,
784 * just assume that if it exists, it's a valid library. */
785
786 return buf;
787 }
788
789 /* not found in any path */
790 return NULL;
791}
792#else
793#ifdef __ELF__
794#warning Cache support not implemented for your target
795#endif
796static char *lookup_cache_lib(elfobj *elf, char *fname)
797{
798 return NULL;
799}
800#endif
636 801
637static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len) 802static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
638{ 803{
639 unsigned long i; 804 unsigned long i;
640 char *needed; 805 char *needed;
641 void *strtbl_void; 806 void *strtbl_void;
642 char *p; 807 char *p;
643 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
644 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
645 815
646 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
647 817
648 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
649#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
651 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
652 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
653 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
654 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
655 Elf ## B ## _Off offset; \ 825 Elf ## B ## _Off offset; \
826 size_t matched = 0; \
827 /* Walk all the program headers to find the PT_DYNAMIC */ \
656 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
657 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 829 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) \
830 continue; \
658 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
659 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 832 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) \
833 continue; \
834 /* Walk all the dynamic tags to find NEEDED entries */ \
660 dyn = DYN ## B (elf->data + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
661 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
662 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
663 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
664 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
665 ++dyn; \ 840 ++dyn; \
666 continue; \ 841 continue; \
667 } \ 842 } \
668 needed = (char*)(elf->data + offset); \ 843 needed = elf->data + offset; \
669 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
670 if (!be_very_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
671 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
672 if (use_ldcache) \ 848 if (use_ldcache) \
673 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
674 needed = p; \ 850 needed = p; \
675 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
676 } \ 852 } \
677 *found_needed = 1; \ 853 *found_needed = 1; \
678 } else { \ 854 } else { \
679 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \ 855 /* -N -> print matching entries */ \
856 size_t n; \
857 const char *find_lib_name; \
858 \
859 array_for_each(find_lib_arr, n, find_lib_name) \
860 if (!strcmp(find_lib_name, needed)) \
861 ++matched; \
862 \
863 if (matched == array_cnt(find_lib_arr)) { \
680 *found_lib = 1; \ 864 *found_lib = 1; \
681 return (be_very_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
682 } \ 866 } \
683 } \ 867 } \
684 } \ 868 } \
685 ++dyn; \ 869 ++dyn; \
686 } \ 870 } \
704 if (strtbl_void) { 888 if (strtbl_void) {
705#define SHOW_INTERP(B) \ 889#define SHOW_INTERP(B) \
706 if (elf->elf_class == ELFCLASS ## B) { \ 890 if (elf->elf_class == ELFCLASS ## B) { \
707 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 891 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
708 *found_interp = 1; \ 892 *found_interp = 1; \
709 return (be_very_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \ 893 return (be_wewy_wewy_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \
710 } 894 }
711 SHOW_INTERP(32) 895 SHOW_INTERP(32)
712 SHOW_INTERP(64) 896 SHOW_INTERP(64)
713 } 897 }
714 return NULL; 898 return NULL;
715} 899}
716static char *scanelf_file_bind(elfobj *elf, char *found_bind) 900static char *scanelf_file_bind(elfobj *elf, char *found_bind)
717{ 901{
718 unsigned long i; 902 unsigned long i;
719 struct stat s; 903 struct stat s;
904 char dynamic = 0;
720 905
721 if (!show_bind) return NULL; 906 if (!show_bind) return NULL;
722 if (!elf->phdr) return NULL; 907 if (!elf->phdr) return NULL;
723 908
724#define SHOW_BIND(B) \ 909#define SHOW_BIND(B) \
726 Elf ## B ## _Dyn *dyn; \ 911 Elf ## B ## _Dyn *dyn; \
727 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 912 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
728 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 913 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
729 Elf ## B ## _Off offset; \ 914 Elf ## B ## _Off offset; \
730 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 915 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
731 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 916 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
917 dynamic = 1; \
732 offset = EGET(phdr[i].p_offset); \ 918 offset = EGET(phdr[i].p_offset); \
733 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 919 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
734 dyn = DYN ## B (elf->data + offset); \ 920 dyn = DYN ## B (elf->vdata + offset); \
735 while (EGET(dyn->d_tag) != DT_NULL) { \ 921 while (EGET(dyn->d_tag) != DT_NULL) { \
736 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 922 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
737 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \ 923 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
738 { \ 924 { \
739 if (be_quiet) return NULL; \ 925 if (be_quiet) return NULL; \
740 *found_bind = 1; \ 926 *found_bind = 1; \
741 return (char *)(be_very_quiet ? NULL : "NOW"); \ 927 return (char *)(be_wewy_wewy_quiet ? NULL : "NOW"); \
742 } \ 928 } \
743 ++dyn; \ 929 ++dyn; \
744 } \ 930 } \
745 } \ 931 } \
746 } 932 }
747 SHOW_BIND(32) 933 SHOW_BIND(32)
748 SHOW_BIND(64) 934 SHOW_BIND(64)
749 935
750 if (be_very_quiet) return NULL; 936 if (be_wewy_wewy_quiet) return NULL;
751 937
938 /* don't output anything if quiet mode and the ELF is static or not setuid */
752 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) { 939 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
753 return NULL; 940 return NULL;
754 } else { 941 } else {
755 *found_bind = 1; 942 *found_bind = 1;
756 return (char *) "LAZY"; 943 return (char *)(dynamic ? "LAZY" : "STATIC");
757 } 944 }
758} 945}
759static char *scanelf_file_soname(elfobj *elf, char *found_soname) 946static char *scanelf_file_soname(elfobj *elf, char *found_soname)
760{ 947{
761 unsigned long i; 948 unsigned long i;
773 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 960 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
774 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 961 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
775 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 962 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
776 Elf ## B ## _Off offset; \ 963 Elf ## B ## _Off offset; \
777 /* only look for soname in shared objects */ \ 964 /* only look for soname in shared objects */ \
778 if (ehdr->e_type != ET_DYN) \ 965 if (EGET(ehdr->e_type) != ET_DYN) \
779 return NULL; \ 966 return NULL; \
780 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 967 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
781 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 968 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
782 offset = EGET(phdr[i].p_offset); \ 969 offset = EGET(phdr[i].p_offset); \
783 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 970 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
784 dyn = DYN ## B (elf->data + offset); \ 971 dyn = DYN ## B (elf->vdata + offset); \
785 while (EGET(dyn->d_tag) != DT_NULL) { \ 972 while (EGET(dyn->d_tag) != DT_NULL) { \
786 if (EGET(dyn->d_tag) == DT_SONAME) { \ 973 if (EGET(dyn->d_tag) == DT_SONAME) { \
787 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 974 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
788 if (offset >= (Elf ## B ## _Off)elf->len) { \ 975 if (offset >= (Elf ## B ## _Off)elf->len) { \
789 ++dyn; \ 976 ++dyn; \
790 continue; \ 977 continue; \
791 } \ 978 } \
792 soname = (char*)(elf->data + offset); \ 979 soname = elf->data + offset; \
793 *found_soname = 1; \ 980 *found_soname = 1; \
794 return (be_very_quiet ? NULL : soname); \ 981 return (be_wewy_wewy_quiet ? NULL : soname); \
795 } \ 982 } \
796 ++dyn; \ 983 ++dyn; \
797 } \ 984 } \
798 } } 985 } }
799 SHOW_SONAME(32) 986 SHOW_SONAME(32)
800 SHOW_SONAME(64) 987 SHOW_SONAME(64)
801 } 988 }
802 989
803 return NULL; 990 return NULL;
804} 991}
992
993/*
994 * We support the symbol form:
995 * [%[modifiers]%][[+-]<symbol name>][,[.....]]
996 * If the symbol name is empty, then all symbols are matched.
997 * If the symbol name is a glob ("*"), then all symbols are dumped (debug).
998 * Do not rely on this output format at all.
999 * Otherwise the symbol name is used to search (either regex or string compare).
1000 * If the first char of the symbol name is a plus ("+"), then only match
1001 * defined symbols. If it's a minus ("-"), only match undefined symbols.
1002 * Putting modifiers in between the percent signs allows for more in depth
1003 * filters. There are groups of modifiers. If you don't specify a member
1004 * of a group, then all types in that group are matched. The current
1005 * groups and their types are:
1006 * STT group: STT_NOTYPE:n STT_OBJECT:o STT_FUNC:f SST_FILE:F
1007 * STB group: STB_LOCAL:l STB_GLOBAL:g STB_WEAK:w
1008 * SHN group: SHN_UNDEF:u SHN_ABS:a SHN_COMMON:c {defined}:d
1009 * The "defined" value in the SHN group does not correspond to a SHN_xxx define.
1010 * You can search for multiple symbols at once by seperating with a comma (",").
1011 *
1012 * Some examples:
1013 * ELFs with a weak function "foo":
1014 * scanelf -s %wf%foo <ELFs>
1015 * ELFs that define the symbol "main":
1016 * scanelf -s +main <ELFs>
1017 * scanelf -s %d%main <ELFs>
1018 * ELFs that refer to the undefined symbol "brk":
1019 * scanelf -s -brk <ELFs>
1020 * scanelf -s %u%brk <ELFs>
1021 * All global defined objects in an ELF:
1022 * scanelf -s %ogd% <ELF>
1023 */
1024static void
1025scanelf_match_symname(elfobj *elf, char *found_sym, char **ret, size_t *ret_len, const char *symname,
1026 unsigned int stt, unsigned int stb, unsigned int shn, unsigned long size)
1027{
1028 char *this_sym, *next_sym, saved = saved;
1029
1030 /* allow the user to specify a comma delimited list of symbols to search for */
1031 next_sym = NULL;
1032 do {
1033 bool inc_notype, inc_object, inc_func, inc_file,
1034 inc_local, inc_global, inc_weak,
1035 inc_def, inc_undef, inc_abs, inc_common;
1036
1037 if (next_sym) {
1038 next_sym[-1] = saved;
1039 this_sym = next_sym;
1040 } else
1041 this_sym = find_sym;
1042 if ((next_sym = strchr(this_sym, ','))) {
1043 /* make parsing easier by killing the comma temporarily */
1044 saved = *next_sym;
1045 *next_sym = '\0';
1046 next_sym += 1;
1047 }
1048
1049 /* symbol selection! */
1050 inc_notype = inc_object = inc_func = inc_file = \
1051 inc_local = inc_global = inc_weak = \
1052 inc_def = inc_undef = inc_abs = inc_common = \
1053 (*this_sym != '%');
1054
1055 /* parse the contents of %...% */
1056 if (!inc_notype) {
1057 while (*(this_sym++)) {
1058 if (*this_sym == '%') {
1059 ++this_sym;
1060 break;
1061 }
1062 switch (*this_sym) {
1063 case 'n': inc_notype = true; break;
1064 case 'o': inc_object = true; break;
1065 case 'f': inc_func = true; break;
1066 case 'F': inc_file = true; break;
1067 case 'l': inc_local = true; break;
1068 case 'g': inc_global = true; break;
1069 case 'w': inc_weak = true; break;
1070 case 'd': inc_def = true; break;
1071 case 'u': inc_undef = true; break;
1072 case 'a': inc_abs = true; break;
1073 case 'c': inc_common = true; break;
1074 default: err("invalid symbol selector '%c'", *this_sym);
1075 }
1076 }
1077
1078 /* If no types are matched, not match all */
1079 if (!inc_notype && !inc_object && !inc_func && !inc_file)
1080 inc_notype = inc_object = inc_func = inc_file = true;
1081 if (!inc_local && !inc_global && !inc_weak)
1082 inc_local = inc_global = inc_weak = true;
1083 if (!inc_def && !inc_undef && !inc_abs && !inc_common)
1084 inc_def = inc_undef = inc_abs = inc_common = true;
1085
1086 /* backwards compat for defined/undefined short hand */
1087 } else if (*this_sym == '+') {
1088 inc_undef = false;
1089 ++this_sym;
1090 } else if (*this_sym == '-') {
1091 inc_def = inc_abs = inc_common = false;
1092 ++this_sym;
1093 }
1094
1095 /* filter symbols */
1096 if ((!inc_notype && stt == STT_NOTYPE) || \
1097 (!inc_object && stt == STT_OBJECT) || \
1098 (!inc_func && stt == STT_FUNC ) || \
1099 (!inc_file && stt == STT_FILE ) || \
1100 (!inc_local && stb == STB_LOCAL ) || \
1101 (!inc_global && stb == STB_GLOBAL) || \
1102 (!inc_weak && stb == STB_WEAK ) || \
1103 (!inc_def && shn && shn < SHN_LORESERVE) || \
1104 (!inc_undef && shn == SHN_UNDEF ) || \
1105 (!inc_abs && shn == SHN_ABS ) || \
1106 (!inc_common && shn == SHN_COMMON))
1107 continue;
1108
1109 if (*this_sym == '*') {
1110 /* a "*" symbol gets you debug output */
1111 printf("%s(%s) %5lX %15s %15s %15s %s\n",
1112 ((*found_sym == 0) ? "\n\t" : "\t"),
1113 elf->base_filename,
1114 size,
1115 get_elfstttype(stt),
1116 get_elfstbtype(stb),
1117 get_elfshntype(shn),
1118 symname);
1119 goto matched;
1120
1121 } else {
1122 if (g_match) {
1123 /* regex match the symbol */
1124 if (rematch(this_sym, symname, REG_EXTENDED) != 0)
1125 continue;
1126
1127 } else if (*this_sym) {
1128 /* give empty symbols a "pass", else do a normal compare */
1129 const size_t len = strlen(this_sym);
1130 if (!(strncmp(this_sym, symname, len) == 0 &&
1131 /* Accept unversioned symbol names */
1132 (symname[len] == '\0' || symname[len] == '@')))
1133 continue;
1134 }
1135
1136 if (be_semi_verbose) {
1137 char buf[1024];
1138 snprintf(buf, sizeof(buf), "%lX %s %s",
1139 size,
1140 get_elfstttype(stt),
1141 this_sym);
1142 *ret = xstrdup(buf);
1143 } else {
1144 if (*ret) xchrcat(ret, ',', ret_len);
1145 xstrcat(ret, symname, ret_len);
1146 }
1147
1148 goto matched;
1149 }
1150 } while (next_sym);
1151
1152 return;
1153
1154 matched:
1155 *found_sym = 1;
1156 if (next_sym)
1157 next_sym[-1] = saved;
1158}
1159
805static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
806{ 1161{
807 unsigned long i; 1162 unsigned long i;
808 char *ret; 1163 char *ret;
809 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
810 1165
811 if (!find_sym) return NULL; 1166 if (!find_sym) return NULL;
812 ret = find_sym; 1167 ret = NULL;
813 1168
814 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1169 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
815 1170
816 if (symtab_void && strtab_void) { 1171 if (symtab_void && strtab_void) {
817#define FIND_SYM(B) \ 1172#define FIND_SYM(B) \
818 if (elf->elf_class == ELFCLASS ## B) { \ 1173 if (elf->elf_class == ELFCLASS ## B) { \
819 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1174 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
820 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1175 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
821 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 1176 Elf ## B ## _Sym *sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
822 unsigned long cnt = EGET(symtab->sh_entsize); \ 1177 unsigned long cnt = EGET(symtab->sh_entsize); \
823 char *symname; \ 1178 char *symname; \
1179 size_t ret_len = 0; \
824 if (cnt) \ 1180 if (cnt) \
825 cnt = EGET(symtab->sh_size) / cnt; \ 1181 cnt = EGET(symtab->sh_size) / cnt; \
826 for (i = 0; i < cnt; ++i) { \ 1182 for (i = 0; i < cnt; ++i) { \
1183 if ((void*)sym > elf->data_end) { \
1184 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1185 goto break_out; \
1186 } \
827 if (sym->st_name) { \ 1187 if (sym->st_name) { \
1188 /* make sure the symbol name is in acceptable memory range */ \
828 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1189 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
829 if ((void*)symname > (void*)elf->data_end) { \ 1190 if ((void*)symname > elf->data_end) { \
830 warnf("%s: corrupt ELF symbols", elf->filename); \ 1191 warnf("%s: corrupt ELF symbols", elf->filename); \
1192 ++sym; \
831 continue; \ 1193 continue; \
832 } \ 1194 } \
833 if (*find_sym == '*') { \ 1195 scanelf_match_symname(elf, found_sym, \
834 printf("%s(%s) %5lX %15s %s\n", \ 1196 &ret, &ret_len, symname, \
835 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1197 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
836 elf->base_filename, \ 1198 ELF##B##_ST_BIND(EGET(sym->st_info)), \
837 (unsigned long)sym->st_size, \ 1199 EGET(sym->st_shndx), \
838 get_elfstttype(sym->st_info), \ 1200 /* st_size can be 64bit, but no one is really that big, so screw em */ \
839 symname); \ 1201 EGET(sym->st_size)); \
840 *found_sym = 1; \
841 } else { \
842 char *this_sym, *next_sym; \
843 this_sym = find_sym; \
844 do { \
845 next_sym = strchr(this_sym, ','); \
846 if (next_sym == NULL) \
847 next_sym = this_sym + strlen(this_sym); \
848 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
849 (strcmp(symname, versioned_symname) == 0)) { \
850 ret = this_sym; \
851 (*found_sym)++; \
852 goto break_out; \
853 } \
854 this_sym = next_sym + 1; \
855 } while (*next_sym != '\0'); \
856 } \
857 } \ 1202 } \
858 ++sym; \ 1203 ++sym; \
859 } } 1204 } }
860 FIND_SYM(32) 1205 FIND_SYM(32)
861 FIND_SYM(64) 1206 FIND_SYM(64)
862 } 1207 }
863 1208
864break_out: 1209break_out:
865 if (be_very_quiet) return NULL; 1210 if (be_wewy_wewy_quiet) return NULL;
866 1211
867 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
868 return ret; 1213 return ret;
869 if (be_quiet) 1214 if (be_quiet)
870 return NULL; 1215 return NULL;
871 else 1216 else
872 return (char *)" - "; 1217 return " - ";
873} 1218}
874 1219
875
876static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
877{ 1221{
878 if (!find_section) 1222 if (!find_section)
879 return NULL; 1223 return NULL;
880 1224
881#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
882 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1228 int invert; \
1229 const char *section_name; \
883 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1234 invert = (*section_name == '!' ? 1 : 0); \
884 section = SHDR ## B (elf_findsecbyname(elf, find_section)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
885 if (section != NULL) \ 1236 if ((section == NULL && invert) || (section != NULL && !invert)) \
1237 ++matched; \
1238 } \
1239 \
1240 if (matched == array_cnt(find_section_arr)) \
886 *found_section = 1; \ 1241 *found_section = 1; \
887 } 1242 }
888 FIND_SECTION(32) 1243 FIND_SECTION(32)
889 FIND_SECTION(64) 1244 FIND_SECTION(64)
890 1245
891 1246 if (be_wewy_wewy_quiet)
892 if (be_very_quiet) return NULL; 1247 return NULL;
893 1248
894 if (*found_section) 1249 if (*found_section)
895 return find_section; 1250 return find_section;
896 1251
897 if (be_quiet) 1252 if (be_quiet)
898 return NULL; 1253 return NULL;
899 else 1254 else
900 return (char *)" - "; 1255 return " - ";
901} 1256}
902 1257
903/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
904#define prints(str) write(fileno(stdout), str, strlen(str)) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
905static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
906{ 1261{
907 unsigned long i; 1262 unsigned long i;
908 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1263 char found_pax, found_phdr, found_relro, found_load, found_textrel,
909 found_rpath, found_needed, found_interp, found_bind, found_soname, 1264 found_rpath, found_needed, found_interp, found_bind, found_soname,
910 found_sym, found_lib, found_file, found_textrels, found_section; 1265 found_sym, found_lib, found_file, found_textrels, found_section;
911 static char *out_buffer = NULL; 1266 static char *out_buffer = NULL;
912 static size_t out_len; 1267 static size_t out_len;
913 1268
914 found_pax = found_phdr = found_relro = found_load = found_textrel = \ 1269 found_pax = found_phdr = found_relro = found_load = found_textrel = \
923 printf("%s: scanning file\n", elf->filename); 1278 printf("%s: scanning file\n", elf->filename);
924 1279
925 /* init output buffer */ 1280 /* init output buffer */
926 if (!out_buffer) { 1281 if (!out_buffer) {
927 out_len = sizeof(char) * 80; 1282 out_len = sizeof(char) * 80;
928 out_buffer = (char*)xmalloc(out_len); 1283 out_buffer = xmalloc(out_len);
929 } 1284 }
930 *out_buffer = '\0'; 1285 *out_buffer = '\0';
931 1286
932 /* show the header */ 1287 /* show the header */
933 if (!be_quiet && show_banner) { 1288 if (!be_quiet && show_banner) {
934 for (i = 0; out_format[i]; ++i) { 1289 for (i = 0; out_format[i]; ++i) {
935 if (!IS_MODIFIER(out_format[i])) continue; 1290 if (!IS_MODIFIER(out_format[i])) continue;
936 1291
937 switch (out_format[++i]) { 1292 switch (out_format[++i]) {
1293 case '+': break;
938 case '%': break; 1294 case '%': break;
939 case '#': break; 1295 case '#': break;
940 case 'F': 1296 case 'F':
941 case 'p': 1297 case 'p':
942 case 'f': prints("FILE "); found_file = 1; break; 1298 case 'f': prints("FILE "); found_file = 1; break;
943 case 'o': prints(" TYPE "); break; 1299 case 'o': prints(" TYPE "); break;
944 case 'x': prints(" PAX "); break; 1300 case 'x': prints(" PAX "); break;
945 case 'e': prints("STK/REL/PTL "); break; 1301 case 'e': prints("STK/REL/PTL "); break;
946 case 't': prints("TEXTREL "); break; 1302 case 't': prints("TEXTREL "); break;
947 case 'r': prints("RPATH "); break; 1303 case 'r': prints("RPATH "); break;
1304 case 'M': prints("CLASS "); break;
948 case 'n': prints("NEEDED "); break; 1305 case 'n': prints("NEEDED "); break;
949 case 'i': prints("INTERP "); break; 1306 case 'i': prints("INTERP "); break;
950 case 'b': prints("BIND "); break; 1307 case 'b': prints("BIND "); break;
1308 case 'Z': prints("SIZE "); break;
951 case 'S': prints("SONAME "); break; 1309 case 'S': prints("SONAME "); break;
952 case 's': prints("SYM "); break; 1310 case 's': prints("SYM "); break;
953 case 'N': prints("LIB "); break; 1311 case 'N': prints("LIB "); break;
954 case 'T': prints("TEXTRELS "); break; 1312 case 'T': prints("TEXTRELS "); break;
955 case 'k': break; 1313 case 'k': prints("SECTION "); break;
1314 case 'a': prints("ARCH "); break;
1315 case 'I': prints("OSABI "); break;
1316 case 'Y': prints("EABI "); break;
1317 case 'O': prints("PERM "); break;
1318 case 'D': prints("ENDIAN "); break;
956 default: warnf("'%c' has no title ?", out_format[i]); 1319 default: warnf("'%c' has no title ?", out_format[i]);
957 } 1320 }
958 } 1321 }
959 if (!found_file) prints("FILE "); 1322 if (!found_file) prints("FILE ");
960 prints("\n"); 1323 prints("\n");
964 1327
965 /* dump all the good stuff */ 1328 /* dump all the good stuff */
966 for (i = 0; out_format[i]; ++i) { 1329 for (i = 0; out_format[i]; ++i) {
967 const char *out; 1330 const char *out;
968 const char *tmp; 1331 const char *tmp;
969 1332 static char ubuf[sizeof(unsigned long)*2];
970 if (!IS_MODIFIER(out_format[i])) { 1333 if (!IS_MODIFIER(out_format[i])) {
971 xchrcat(&out_buffer, out_format[i], &out_len); 1334 xchrcat(&out_buffer, out_format[i], &out_len);
972 continue; 1335 continue;
973 } 1336 }
974 1337
975 out = NULL; 1338 out = NULL;
976 be_very_quiet = (out_format[i] == '#'); 1339 be_wewy_wewy_quiet = (out_format[i] == '#');
1340 be_semi_verbose = (out_format[i] == '+');
977 switch (out_format[++i]) { 1341 switch (out_format[++i]) {
1342 case '+':
978 case '%': 1343 case '%':
979 case '#': 1344 case '#':
980 xchrcat(&out_buffer, out_format[i], &out_len); break; 1345 xchrcat(&out_buffer, out_format[i], &out_len); break;
981 case 'F': 1346 case 'F':
982 found_file = 1; 1347 found_file = 1;
983 if (be_very_quiet) break; 1348 if (be_wewy_wewy_quiet) break;
984 xstrcat(&out_buffer, elf->filename, &out_len); 1349 xstrcat(&out_buffer, elf->filename, &out_len);
985 break; 1350 break;
986 case 'p': 1351 case 'p':
987 found_file = 1; 1352 found_file = 1;
988 if (be_very_quiet) break; 1353 if (be_wewy_wewy_quiet) break;
989 tmp = elf->filename; 1354 tmp = elf->filename;
990 if (search_path) { 1355 if (search_path) {
991 ssize_t len_search = strlen(search_path); 1356 ssize_t len_search = strlen(search_path);
992 ssize_t len_file = strlen(elf->filename); 1357 ssize_t len_file = strlen(elf->filename);
993 if (!strncmp(elf->filename, search_path, len_search) && \ 1358 if (!strncmp(elf->filename, search_path, len_search) && \
997 } 1362 }
998 xstrcat(&out_buffer, tmp, &out_len); 1363 xstrcat(&out_buffer, tmp, &out_len);
999 break; 1364 break;
1000 case 'f': 1365 case 'f':
1001 found_file = 1; 1366 found_file = 1;
1002 if (be_very_quiet) break; 1367 if (be_wewy_wewy_quiet) break;
1003 tmp = strrchr(elf->filename, '/'); 1368 tmp = strrchr(elf->filename, '/');
1004 tmp = (tmp == NULL ? elf->filename : tmp+1); 1369 tmp = (tmp == NULL ? elf->filename : tmp+1);
1005 xstrcat(&out_buffer, tmp, &out_len); 1370 xstrcat(&out_buffer, tmp, &out_len);
1006 break; 1371 break;
1007 case 'o': out = get_elfetype(elf); break; 1372 case 'o': out = get_elfetype(elf); break;
1008 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1373 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1009 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break; 1374 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
1010 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1375 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1011 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break; 1376 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
1012 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 1377 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1378 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1379 case 'D': out = get_endian(elf); break;
1380 case 'O': out = strfileperms(elf->filename); break;
1013 case 'n': 1381 case 'n':
1014 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; 1382 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
1015 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1383 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1016 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1384 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1017 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1385 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1018 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1386 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1019 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1387 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1388 case 'a': out = get_elfemtype(elf); break;
1389 case 'I': out = get_elfosabi(elf); break;
1390 case 'Y': out = get_elf_eabi(elf); break;
1391 case 'Z': snprintf(ubuf, sizeof(ubuf), "%lu", (unsigned long)elf->len); out = ubuf; break;;
1020 default: warnf("'%c' has no scan code?", out_format[i]); 1392 default: warnf("'%c' has no scan code?", out_format[i]);
1021 } 1393 }
1022 if (out) { 1394 if (out)
1023 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1024 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1025 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1026 else
1027 xstrcat(&out_buffer, out, &out_len); 1395 xstrcat(&out_buffer, out, &out_len);
1028 }
1029 } 1396 }
1030 1397
1031#define FOUND_SOMETHING() \ 1398#define FOUND_SOMETHING() \
1032 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1399 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1033 found_rpath || found_needed || found_interp || found_bind || \ 1400 found_rpath || found_needed || found_interp || found_bind || \
1065 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1066 goto label_done; 1433 goto label_done;
1067 break; 1434 break;
1068 default: break; 1435 default: break;
1069 } 1436 }
1070 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1071 char sbuf[126]; 1438 char sbuf[126];
1072 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1073 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1074 char *p; 1441 char *p;
1075 while((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1076 *p = 0; 1443 *p = 0;
1077 if (atoi(p+1) == get_etype(elf)) 1444 if (etype_lookup(p+1) == get_etype(elf))
1078 goto label_ret; 1445 goto label_ret;
1079 } 1446 }
1080 } 1447 }
1081 if (atoi(sbuf) != get_etype(elf)) 1448 if (etype_lookup(sbuf) != get_etype(elf))
1082 goto label_done; 1449 goto label_done;
1083 } 1450 }
1084 1451
1085label_ret: 1452label_ret:
1086 ret = scanelf_elfobj(elf); 1453 ret = scanelf_elfobj(elf);
1100 1467
1101 ar = ar_open_fd(filename, fd); 1468 ar = ar_open_fd(filename, fd);
1102 if (ar == NULL) 1469 if (ar == NULL)
1103 return 1; 1470 return 1;
1104 1471
1105 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0); 1472 ar_buffer = mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1106 while ((m=ar_next(ar)) != NULL) { 1473 while ((m = ar_next(ar)) != NULL) {
1474 off_t cur_pos = lseek(fd, 0, SEEK_CUR);
1475 if (cur_pos == -1)
1476 errp("lseek() failed");
1107 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size); 1477 elf = readelf_buffer(m->name, ar_buffer + cur_pos, m->size);
1108 if (elf) { 1478 if (elf) {
1109 scanelf_elfobj(elf); 1479 scanelf_elfobj(elf);
1110 unreadelf(elf); 1480 unreadelf(elf);
1111 } 1481 }
1112 } 1482 }
1113 munmap(ar_buffer, len); 1483 munmap(ar_buffer, len);
1114 1484
1115 return 0; 1485 return 0;
1116} 1486}
1117/* scan a file which may be an elf or an archive or some other magical beast */ 1487/* scan a file which may be an elf or an archive or some other magical beast */
1118static void scanelf_file(const char *filename) 1488static int scanelf_file(const char *filename, const struct stat *st_cache)
1119{ 1489{
1490 const struct stat *st = st_cache;
1120 struct stat st; 1491 struct stat symlink_st;
1121 int fd; 1492 int fd;
1122 1493
1123 /* make sure 'filename' exists */
1124 if (lstat(filename, &st) == -1) {
1125 if (be_verbose > 2) printf("%s: does not exist\n", filename);
1126 return;
1127 }
1128
1129 /* always handle regular files and handle symlinked files if no -y */ 1494 /* always handle regular files and handle symlinked files if no -y */
1130 if (S_ISLNK(st.st_mode)) { 1495 if (S_ISLNK(st->st_mode)) {
1131 if (!scan_symlink) return; 1496 if (!scan_symlink) return 1;
1132 stat(filename, &st); 1497 stat(filename, &symlink_st);
1498 st = &symlink_st;
1133 } 1499 }
1500
1134 if (!S_ISREG(st.st_mode)) { 1501 if (!S_ISREG(st->st_mode)) {
1135 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1502 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1136 return; 1503 return 1;
1137 } 1504 }
1138 1505
1506 if (match_perms) {
1507 if ((st->st_mode | match_perms) != st->st_mode)
1508 return 1;
1509 }
1139 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1510 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1140 return; 1511 return 1;
1141 1512
1142 if (scanelf_elf(filename, fd, st.st_size) == 1 && scan_archives) 1513 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1143 /* if it isn't an ELF, maybe it's an .a archive */ 1514 /* if it isn't an ELF, maybe it's an .a archive */
1144 scanelf_archive(filename, fd, st.st_size); 1515 scanelf_archive(filename, fd, st->st_size);
1145 1516
1146 close(fd); 1517 close(fd);
1518 return 0;
1519}
1520
1521static const char *maybe_add_root(const char *fname, char *buf)
1522{
1523 if (root && strncmp(fname, root, strlen(root))) {
1524 strcpy(buf, root);
1525 strncat(buf, fname, __PAX_UTILS_PATH_MAX - strlen(root) - 1);
1526 fname = buf;
1527 }
1528 return fname;
1147} 1529}
1148 1530
1149/* scan a directory for ET_EXEC files and print when we find one */ 1531/* scan a directory for ET_EXEC files and print when we find one */
1150static void scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1151{ 1533{
1152 register DIR *dir; 1534 register DIR *dir;
1153 register struct dirent *dentry; 1535 register struct dirent *dentry;
1154 struct stat st_top, st; 1536 struct stat st_top, st;
1155 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1156 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1157 1543
1158 /* make sure path exists */ 1544 /* make sure path exists */
1159 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1160 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1161 return; 1547 return 1;
1162 } 1548 }
1163 1549
1164 /* ok, if it isn't a directory, assume we can open it */ 1550 /* ok, if it isn't a directory, assume we can open it */
1165 if (!S_ISDIR(st_top.st_mode)) { 1551 if (!S_ISDIR(st_top.st_mode)) {
1166 scanelf_file(path); 1552 return scanelf_file(path, &st_top);
1167 return;
1168 } 1553 }
1169 1554
1170 /* now scan the dir looking for fun stuff */ 1555 /* now scan the dir looking for fun stuff */
1171 if ((dir = opendir(path)) == NULL) { 1556 if ((dir = opendir(path)) == NULL) {
1172 warnf("could not opendir %s: %s", path, strerror(errno)); 1557 warnf("could not opendir %s: %s", path, strerror(errno));
1173 return; 1558 return 1;
1174 } 1559 }
1175 if (be_verbose > 1) printf("%s: scanning dir\n", path); 1560 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1176 1561
1177 pathlen = strlen(path); 1562 pathlen = strlen(path);
1178 while ((dentry = readdir(dir))) { 1563 while ((dentry = readdir(dir))) {
1182 if (len >= sizeof(buf)) { 1567 if (len >= sizeof(buf)) {
1183 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, 1568 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1184 (unsigned long)len, (unsigned long)sizeof(buf)); 1569 (unsigned long)len, (unsigned long)sizeof(buf));
1185 continue; 1570 continue;
1186 } 1571 }
1187 sprintf(buf, "%s/%s", path, dentry->d_name); 1572 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
1188 if (lstat(buf, &st) != -1) { 1573 if (lstat(buf, &st) != -1) {
1189 if (S_ISREG(st.st_mode)) 1574 if (S_ISREG(st.st_mode))
1190 scanelf_file(buf); 1575 ret = scanelf_file(buf, &st);
1191 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1576 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1192 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1577 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1193 scanelf_dir(buf); 1578 ret = scanelf_dir(buf);
1194 } 1579 }
1195 } 1580 }
1196 } 1581 }
1197 closedir(dir); 1582 closedir(dir);
1583 return ret;
1198} 1584}
1199 1585
1200static int scanelf_from_file(char *filename) 1586static int scanelf_from_file(const char *filename)
1201{ 1587{
1202 FILE *fp = NULL; 1588 FILE *fp = NULL;
1203 char *p; 1589 char *p;
1204 char path[__PAX_UTILS_PATH_MAX]; 1590 char path[__PAX_UTILS_PATH_MAX];
1591 int ret = 0;
1205 1592
1206 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) 1593 if (strcmp(filename, "-") == 0)
1207 fp = stdin; 1594 fp = stdin;
1208 else if ((fp = fopen(filename, "r")) == NULL) 1595 else if ((fp = fopen(filename, "r")) == NULL)
1209 return 1; 1596 return 1;
1210 1597
1211 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1598 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1212 if ((p = strchr(path, '\n')) != NULL) 1599 if ((p = strchr(path, '\n')) != NULL)
1213 *p = 0; 1600 *p = 0;
1214 search_path = path; 1601 search_path = path;
1215 scanelf_dir(path); 1602 ret = scanelf_dir(path);
1216 } 1603 }
1217 if (fp != stdin) 1604 if (fp != stdin)
1218 fclose(fp); 1605 fclose(fp);
1219 return 0; 1606 return ret;
1220} 1607}
1221 1608
1609#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1610
1222static int load_ld_so_conf(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1223{ 1612{
1224 FILE *fp = NULL; 1613 FILE *fp = NULL;
1225 char *p; 1614 char *p;
1226 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1227 1617
1228 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1229 return i;
1230 1619
1231 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1232 return i; 1621 return i;
1233 1622
1234 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1235 if ((p = strrchr(path, '\r')) != NULL) 1624 if ((p = strrchr(path, '\r')) != NULL)
1236 *p = 0; 1625 *p = 0;
1237 if ((p = strchr(path, '\n')) != NULL) 1626 if ((p = strchr(path, '\n')) != NULL)
1238 *p = 0; 1627 *p = 0;
1239#ifdef HAVE_GLOB 1628
1240 // recursive includes of the same file will make this segfault. 1629 /* recursive includes of the same file will make this segfault. */
1241 if ((*path == 'i') && (strncmp(path, "include", 7) == 0) && isblank(path[7])) { 1630 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1242 glob64_t gl; 1631 glob_t gl;
1243 size_t x; 1632 size_t x;
1244 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1245 1634
1246 gpath[sizeof(gpath)] = 0; 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1247 1638
1248 if (path[8] != '/') 1639 if (path[8] != '/')
1249 snprintf(gpath, sizeof(gpath)-1, "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1250 else 1641 else
1251 strncpy(gpath, &path[8], sizeof(gpath)-1); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1252 1643
1253 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1254 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1255 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1256 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1257 continue; 1648 continue;
1258 i = load_ld_so_conf(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1259 if (i + 1 >= sizeof(ldpaths) / sizeof(*ldpaths)) {
1260 globfree64(&gl);
1261 return i;
1262 }
1263 } 1650 }
1264 globfree64 (&gl); 1651 globfree(&gl);
1265 continue; 1652 continue;
1266 } else
1267 abort();
1268 } 1653 }
1269#endif 1654 }
1655
1270 if (*path != '/') 1656 if (*path != '/')
1271 continue; 1657 continue;
1272 1658
1273 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1274
1275 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
1276 break;
1277 } 1660 }
1278 ldpaths[i] = NULL;
1279 1661
1280 fclose(fp); 1662 fclose(fp);
1281 return i; 1663 return i;
1282} 1664}
1283 1665
1666#elif defined(__FreeBSD__) || defined(__DragonFly__)
1667
1668static int load_ld_cache_config(int i, const char *fname)
1669{
1670 FILE *fp = NULL;
1671 char *b = NULL, *p;
1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1674
1675 fname = maybe_add_root(fname, _fname);
1676
1677 if ((fp = fopen(fname, "r")) == NULL)
1678 return i;
1679
1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1681 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1682 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1683 {
1684 fclose(fp);
1685 return i;
1686 }
1687
1688 b = xmalloc(hdr.dirlistlen + 1);
1689 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1690 fclose(fp);
1691 free(b);
1692 return i;
1693 }
1694
1695 while ((p = strsep(&b, ":"))) {
1696 if (*p == '\0')
1697 continue;
1698 xarraypush(ldpaths, p, strlen(p));
1699 }
1700
1701 free(b);
1702 fclose(fp);
1703 return i;
1704}
1705
1706#else
1707#ifdef __ELF__
1708#warning Cache config support not implemented for your target
1709#endif
1710static int load_ld_cache_config(int i, const char *fname)
1711{
1712 return 0;
1713}
1714#endif
1715
1284/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1285static void scanelf_ldpath() 1717static void scanelf_ldpath(void)
1286{ 1718{
1287 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1288 int i = 0; 1722 int i = 0;
1289 1723
1290 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1291 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1292 1726
1293 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1294 1728
1295 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1296 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1297 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1298 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1299 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1300 ++i; 1734 ++i;
1301 } 1735 }
1302 1736
1303 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1304 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1305 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1739 if (!scan_ull) scanelf_dir("/usr/local/lib");
1306} 1740}
1307 1741
1308/* scan env PATH for paths */ 1742/* scan env PATH for paths */
1309static void scanelf_envpath() 1743static void scanelf_envpath(void)
1310{ 1744{
1311 char *path, *p; 1745 char *path, *p;
1312 1746
1313 path = getenv("PATH"); 1747 path = getenv("PATH");
1314 if (!path) 1748 if (!path)
1321 } 1755 }
1322 1756
1323 free(path); 1757 free(path);
1324} 1758}
1325 1759
1326 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1327/* usage / invocation handling functions */
1328#define PARSE_FLAGS "plRmyAXxetrnLibSs:k:gN:TaqvF:f:o:M:E:BhV" 1761#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZCBhV"
1329#define a_argument required_argument 1762#define a_argument required_argument
1330static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1331 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1332 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1333 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1334 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1335 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1336 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1337 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1338 {"fix", no_argument, NULL, 'X'}, 1772 {"fix", no_argument, NULL, 'X'},
1773 {"setpax", a_argument, NULL, 'z'},
1339 {"pax", no_argument, NULL, 'x'}, 1774 {"pax", no_argument, NULL, 'x'},
1340 {"header", no_argument, NULL, 'e'}, 1775 {"header", no_argument, NULL, 'e'},
1341 {"textrel", no_argument, NULL, 't'}, 1776 {"textrel", no_argument, NULL, 't'},
1342 {"rpath", no_argument, NULL, 'r'}, 1777 {"rpath", no_argument, NULL, 'r'},
1343 {"needed", no_argument, NULL, 'n'}, 1778 {"needed", no_argument, NULL, 'n'},
1349 {"lib", a_argument, NULL, 'N'}, 1784 {"lib", a_argument, NULL, 'N'},
1350 {"gmatch", no_argument, NULL, 'g'}, 1785 {"gmatch", no_argument, NULL, 'g'},
1351 {"textrels", no_argument, NULL, 'T'}, 1786 {"textrels", no_argument, NULL, 'T'},
1352 {"etype", a_argument, NULL, 'E'}, 1787 {"etype", a_argument, NULL, 'E'},
1353 {"bits", a_argument, NULL, 'M'}, 1788 {"bits", a_argument, NULL, 'M'},
1789 {"endian", no_argument, NULL, 'D'},
1790 {"osabi", no_argument, NULL, 'I'},
1791 {"eabi", no_argument, NULL, 'Y'},
1792 {"perms", a_argument, NULL, 'O'},
1793 {"size", no_argument, NULL, 'Z'},
1354 {"all", no_argument, NULL, 'a'}, 1794 {"all", no_argument, NULL, 'a'},
1355 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1356 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1357 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1358 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1359 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1360 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1361 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1362 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1363 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1364}; 1805};
1365 1806
1366static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1367 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1368 "Scan all directories in /etc/ld.so.conf", 1809 "Scan all directories in /etc/ld.so.conf",
1810 "Root directory (use with -l or -p)",
1369 "Scan directories recursively", 1811 "Scan directories recursively",
1370 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1371 "Don't scan symlinks", 1813 "Don't scan symlinks",
1372 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1373 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1374 "Try and 'fix' bad things (use with -r/-e)\n", 1816 "Try and 'fix' bad things (use with -r/-e)",
1817 "Sets EI_PAX/PT_PAX_FLAGS to <arg> (use with -Xx)\n",
1375 "Print PaX markings", 1818 "Print PaX markings",
1376 "Print GNU_STACK/PT_LOAD markings", 1819 "Print GNU_STACK/PT_LOAD markings",
1377 "Print TEXTREL information", 1820 "Print TEXTREL information",
1378 "Print RPATH information", 1821 "Print RPATH information",
1379 "Print NEEDED information", 1822 "Print NEEDED information",
1381 "Print BIND information", 1824 "Print BIND information",
1382 "Print SONAME information", 1825 "Print SONAME information",
1383 "Find a specified symbol", 1826 "Find a specified symbol",
1384 "Find a specified section", 1827 "Find a specified section",
1385 "Find a specified library", 1828 "Find a specified library",
1386 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1387 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1388 "Print only ELF files matching numeric constant type", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1389 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1390 "Print all scanned info (-x -e -t -r -b)\n", 1833 "Print Endianness",
1834 "Print OSABI",
1835 "Print EABI (EM_ARM Only)",
1836 "Print only ELF files matching octal permissions",
1837 "Print ELF file size",
1838 "Print all useful/simple info\n",
1391 "Only output 'bad' things", 1839 "Only output 'bad' things",
1392 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1393 "Use specified format for output", 1841 "Use specified format for output",
1394 "Read input stream from a filename", 1842 "Read input stream from a filename",
1395 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1396 "Don't display the header", 1845 "Don't display the header",
1397 "Print this help and exit", 1846 "Print this help and exit",
1398 "Print version and exit", 1847 "Print version and exit",
1399 NULL 1848 NULL
1400}; 1849};
1406 printf("* Scan ELF binaries for stuff\n\n" 1855 printf("* Scan ELF binaries for stuff\n\n"
1407 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0); 1856 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1408 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1409 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1410 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1411 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 1860 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1861 long_opts[i].name, opts_help[i]);
1862 else if (long_opts[i].val > '~')
1863 printf(" --%-7s <arg> * %s\n",
1412 long_opts[i].name, opts_help[i]); 1864 long_opts[i].name, opts_help[i]);
1413 else 1865 else
1414 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1415 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1416 1868
1417 if (status != EXIT_SUCCESS) 1869 puts("\nFor more information, see the scanelf(1) manpage");
1418 exit(status);
1419
1420 puts("\nThe format modifiers for the -F option are:");
1421 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1422 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1423 puts(" i INTERP \tb BIND \ts symbol");
1424 puts(" N library \to Type \tT TEXTRELs");
1425 puts(" S SONAME \tk section");
1426 puts(" p filename (with search path removed)");
1427 puts(" f filename (short name/basename)");
1428 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1429
1430 puts("\nELF Etypes:");
1431 print_etypes(stdout);
1432
1433 exit(status); 1870 exit(status);
1434} 1871}
1435 1872
1436/* parse command line arguments and preform needed actions */ 1873/* parse command line arguments and preform needed actions */
1874#define do_pax_state(option, flag) \
1875 if (islower(option)) { \
1876 flags &= ~PF_##flag; \
1877 flags |= PF_NO##flag; \
1878 } else { \
1879 flags &= ~PF_NO##flag; \
1880 flags |= PF_##flag; \
1881 }
1437static void parseargs(int argc, char *argv[]) 1882static int parseargs(int argc, char *argv[])
1438{ 1883{
1439 int i; 1884 int i;
1440 char *from_file = NULL; 1885 const char *from_file = NULL;
1886 int ret = 0;
1441 1887
1442 opterr = 0; 1888 opterr = 0;
1443 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 1889 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1444 switch (i) { 1890 switch (i) {
1445 1891
1453 case 'f': 1899 case 'f':
1454 if (from_file) warn("You prob don't want to specify -f twice"); 1900 if (from_file) warn("You prob don't want to specify -f twice");
1455 from_file = optarg; 1901 from_file = optarg;
1456 break; 1902 break;
1457 case 'E': 1903 case 'E':
1458 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1459 break; 1905 break;
1460 case 'M': 1906 case 'M':
1461 match_bits = atoi(optarg); 1907 match_bits = atoi(optarg);
1908 if (match_bits == 0) {
1909 if (strcmp(optarg, "ELFCLASS32") == 0)
1910 match_bits = 32;
1911 if (strcmp(optarg, "ELFCLASS64") == 0)
1912 match_bits = 64;
1913 }
1914 break;
1915 case 'O':
1916 if (sscanf(optarg, "%o", &match_perms) == -1)
1917 match_bits = 0;
1462 break; 1918 break;
1463 case 'o': { 1919 case 'o': {
1464 FILE *fp = NULL;
1465 if ((fp = freopen(optarg, "w", stdout)) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1466 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1467 SET_STDOUT(fp);
1468 break; 1922 break;
1469 } 1923 }
1470 case 'k': 1924 case 'k':
1471 if (find_section) warn("You can not specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1472 find_section = optarg;
1473 break; 1926 break;
1474 case 's': { 1927 case 's': {
1475 if (find_sym) warn("You prob don't want to specify -s twice"); 1928 if (find_sym) warn("You prob don't want to specify -s twice");
1476 find_sym = optarg; 1929 find_sym = optarg;
1477 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1478 sprintf(versioned_symname, "%s@", find_sym);
1479 break; 1930 break;
1480 } 1931 }
1481 case 'N': { 1932 case 'N':
1482 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1483 find_lib = optarg;
1484 break; 1934 break;
1485 }
1486
1487 case 'F': { 1935 case 'F': {
1488 if (out_format) warn("You prob don't want to specify -F twice"); 1936 if (out_format) warn("You prob don't want to specify -F twice");
1489 out_format = optarg; 1937 out_format = optarg;
1490 break; 1938 break;
1491 } 1939 }
1940 case 'z': {
1941 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1942 size_t x;
1492 1943
1944 for (x = 0; x < strlen(optarg); x++) {
1945 switch (optarg[x]) {
1946 case 'p':
1947 case 'P':
1948 do_pax_state(optarg[x], PAGEEXEC);
1949 break;
1950 case 's':
1951 case 'S':
1952 do_pax_state(optarg[x], SEGMEXEC);
1953 break;
1954 case 'm':
1955 case 'M':
1956 do_pax_state(optarg[x], MPROTECT);
1957 break;
1958 case 'e':
1959 case 'E':
1960 do_pax_state(optarg[x], EMUTRAMP);
1961 break;
1962 case 'r':
1963 case 'R':
1964 do_pax_state(optarg[x], RANDMMAP);
1965 break;
1966 case 'x':
1967 case 'X':
1968 do_pax_state(optarg[x], RANDEXEC);
1969 break;
1970 default:
1971 break;
1972 }
1973 }
1974 if (!(((flags & PF_PAGEEXEC) && (flags & PF_NOPAGEEXEC)) ||
1975 ((flags & PF_SEGMEXEC) && (flags & PF_NOSEGMEXEC)) ||
1976 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)) ||
1977 ((flags & PF_RANDEXEC) && (flags & PF_NORANDEXEC)) ||
1978 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1979 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1980 setpax = flags;
1981 break;
1982 }
1983 case 'Z': show_size = 1; break;
1493 case 'g': gmatch = 1; break; 1984 case 'g': g_match = 1; break;
1494 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1495 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1496 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1497 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1498 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1499 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1500 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1501 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1509 case 'b': show_bind = 1; break; 2001 case 'b': show_bind = 1; break;
1510 case 'S': show_soname = 1; break; 2002 case 'S': show_soname = 1; break;
1511 case 'T': show_textrels = 1; break; 2003 case 'T': show_textrels = 1; break;
1512 case 'q': be_quiet = 1; break; 2004 case 'q': be_quiet = 1; break;
1513 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1514 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break; 2006 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1515 2007 case 'D': show_endian = 1; break;
2008 case 'I': show_osabi = 1; break;
2009 case 'Y': show_eabi = 1; break;
2010 case 128:
2011 root = optarg;
2012 break;
1516 case ':': 2013 case ':':
1517 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1518 case '?': 2015 case '?':
1519 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1520 default: 2017 default:
1521 err("Unhandled option '%c'; please report this", i); 2018 err("Unhandled option '%c'; please report this", i);
1522 } 2019 }
1523 } 2020 }
1524 2021 if (show_textrels && be_verbose) {
2022 if (which("objdump") != NULL)
2023 has_objdump = 1;
2024 }
2025 /* flatten arrays for display */
2026 if (array_cnt(find_lib_arr))
2027 find_lib = array_flatten_str(find_lib_arr);
2028 if (array_cnt(find_section_arr))
2029 find_section = array_flatten_str(find_section_arr);
1525 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1526 if (out_format) { 2031 if (out_format) {
1527 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1528 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1529 show_textrels = 0; 2034 show_textrels = show_perms = show_endian = show_size = \
2035 show_osabi = show_eabi = 0;
1530 for (i = 0; out_format[i]; ++i) { 2036 for (i = 0; out_format[i]; ++i) {
1531 if (!IS_MODIFIER(out_format[i])) continue; 2037 if (!IS_MODIFIER(out_format[i])) continue;
1532 2038
1533 switch (out_format[++i]) { 2039 switch (out_format[++i]) {
2040 case '+': break;
1534 case '%': break; 2041 case '%': break;
1535 case '#': break; 2042 case '#': break;
1536 case 'F': break; 2043 case 'F': break;
1537 case 'p': break; 2044 case 'p': break;
1538 case 'f': break; 2045 case 'f': break;
1539 case 'k': break; 2046 case 'k': break;
1540 case 's': break; 2047 case 's': break;
1541 case 'N': break; 2048 case 'N': break;
1542 case 'o': break; 2049 case 'o': break;
2050 case 'a': break;
2051 case 'M': break;
2052 case 'Z': show_size = 1; break;
2053 case 'D': show_endian = 1; break;
2054 case 'I': show_osabi = 1; break;
2055 case 'Y': show_eabi = 1; break;
2056 case 'O': show_perms = 1; break;
1543 case 'x': show_pax = 1; break; 2057 case 'x': show_pax = 1; break;
1544 case 'e': show_phdr = 1; break; 2058 case 'e': show_phdr = 1; break;
1545 case 't': show_textrel = 1; break; 2059 case 't': show_textrel = 1; break;
1546 case 'r': show_rpath = 1; break; 2060 case 'r': show_rpath = 1; break;
1547 case 'n': show_needed = 1; break; 2061 case 'n': show_needed = 1; break;
1548 case 'i': show_interp = 1; break; 2062 case 'i': show_interp = 1; break;
1549 case 'b': show_bind = 1; break; 2063 case 'b': show_bind = 1; break;
1550 case 'S': show_soname = 1; break; 2064 case 'S': show_soname = 1; break;
1551 case 'T': show_textrels = 1; break; 2065 case 'T': show_textrels = 1; break;
1552 default: 2066 default:
1553 err("Invalid format specifier '%c' (byte %i)", 2067 err("Invalid format specifier '%c' (byte %i)",
1554 out_format[i], i+1); 2068 out_format[i], i+1);
1555 } 2069 }
1556 } 2070 }
1557 2071
1558 /* construct our default format */ 2072 /* construct our default format */
1559 } else { 2073 } else {
1560 size_t fmt_len = 30; 2074 size_t fmt_len = 30;
1561 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2075 out_format = xmalloc(sizeof(char) * fmt_len);
2076 *out_format = '\0';
1562 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2077 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1563 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 2078 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
2079 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
2080 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
2081 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
2082 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
2083 if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1564 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2084 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1565 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2085 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1566 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2086 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1567 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2087 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1568 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2088 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1576 } 2096 }
1577 if (be_verbose > 2) printf("Format: %s\n", out_format); 2097 if (be_verbose > 2) printf("Format: %s\n", out_format);
1578 2098
1579 /* now lets actually do the scanning */ 2099 /* now lets actually do the scanning */
1580 if (scan_ldpath || use_ldcache) 2100 if (scan_ldpath || use_ldcache)
1581 load_ld_so_conf(0, "/etc/ld.so.conf"); 2101 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1582 if (scan_ldpath) scanelf_ldpath(); 2102 if (scan_ldpath) scanelf_ldpath();
1583 if (scan_envpath) scanelf_envpath(); 2103 if (scan_envpath) scanelf_envpath();
2104 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
2105 from_file = "-";
1584 if (from_file) { 2106 if (from_file) {
1585 scanelf_from_file(from_file); 2107 scanelf_from_file(from_file);
1586 from_file = *argv; 2108 from_file = *argv;
1587 } 2109 }
1588 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 2110 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1589 err("Nothing to scan !?"); 2111 err("Nothing to scan !?");
1590 while (optind < argc) { 2112 while (optind < argc) {
1591 search_path = argv[optind++]; 2113 search_path = argv[optind++];
1592 scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
1593 } 2115 }
1594 2116
1595 /* clean up */ 2117 /* clean up */
1596 if (versioned_symname) free(versioned_symname);
1597 for (i = 0; ldpaths[i]; ++i)
1598 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
1599 2123
1600 if (ldcache != 0) 2124 if (ldcache != 0)
1601 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
1602}
1603
1604
1605
1606/* utility funcs */
1607static char *xstrdup(const char *s)
1608{
1609 char *ret = strdup(s);
1610 if (!ret) err("Could not strdup(): %s", strerror(errno));
1611 return ret; 2126 return ret;
1612} 2127}
1613static void *xmalloc(size_t size)
1614{
1615 void *ret = malloc(size);
1616 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1617 return ret;
1618}
1619static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1620{
1621 size_t new_len;
1622 2128
1623 new_len = strlen(*dst) + strlen(src); 2129static char **get_split_env(const char *envvar)
1624 if (*curr_len <= new_len) {
1625 *curr_len = new_len + (*curr_len / 2);
1626 *dst = realloc(*dst, *curr_len);
1627 if (!*dst)
1628 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1629 }
1630
1631 if (n)
1632 strncat(*dst, src, n);
1633 else
1634 strcat(*dst, src);
1635}
1636static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1637{ 2130{
1638 static char my_app[2]; 2131 const char *delims = " \t\n";
1639 my_app[0] = append; 2132 char **envvals = NULL;
1640 my_app[1] = '\0'; 2133 char *env, *s;
1641 xstrcat(dst, my_app, curr_len); 2134 int nentry;
1642}
1643 2135
2136 if ((env = getenv(envvar)) == NULL)
2137 return NULL;
1644 2138
2139 env = xstrdup(env);
2140 if (env == NULL)
2141 return NULL;
2142
2143 s = strtok(env, delims);
2144 if (s == NULL) {
2145 free(env);
2146 return NULL;
2147 }
2148
2149 nentry = 0;
2150 while (s != NULL) {
2151 ++nentry;
2152 envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
2153 envvals[nentry-1] = s;
2154 s = strtok(NULL, delims);
2155 }
2156 envvals[nentry] = NULL;
2157
2158 /* don't want to free(env) as it contains the memory that backs
2159 * the envvals array of strings */
2160 return envvals;
2161}
2162
2163static void parseenv(void)
2164{
2165 color_init(false);
2166 qa_textrels = get_split_env("QA_TEXTRELS");
2167 qa_execstack = get_split_env("QA_EXECSTACK");
2168 qa_wx_load = get_split_env("QA_WX_LOAD");
2169}
2170
2171#ifdef __PAX_UTILS_CLEANUP
2172static void cleanup(void)
2173{
2174 free(out_format);
2175 free(qa_textrels);
2176 free(qa_execstack);
2177 free(qa_wx_load);
2178}
2179#endif
1645 2180
1646int main(int argc, char *argv[]) 2181int main(int argc, char *argv[])
1647{ 2182{
2183 int ret;
1648 if (argc < 2) 2184 if (argc < 2)
1649 usage(EXIT_FAILURE); 2185 usage(EXIT_FAILURE);
2186 parseenv();
1650 parseargs(argc, argv); 2187 ret = parseargs(argc, argv);
1651 fclose(stdout); 2188 fclose(stdout);
1652#ifdef __BOUNDS_CHECKING_ON 2189#ifdef __PAX_UTILS_CLEANUP
1653 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()"); 2190 cleanup();
2191 warn("The calls to add/delete heap should be off:\n"
2192 "\t- 1 due to the out_buffer not being freed in scanelf_file()\n"
2193 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1654#endif 2194#endif
1655 return EXIT_SUCCESS; 2195 return ret;
1656} 2196}
2197
2198/* Match filename against entries in matchlist, return TRUE
2199 * if the file is listed */
2200static int file_matches_list(const char *filename, char **matchlist)
2201{
2202 char **file;
2203 char *match;
2204 char buf[__PAX_UTILS_PATH_MAX];
2205
2206 if (matchlist == NULL)
2207 return 0;
2208
2209 for (file = matchlist; *file != NULL; file++) {
2210 if (search_path) {
2211 snprintf(buf, sizeof(buf), "%s%s", search_path, *file);
2212 match = buf;
2213 } else {
2214 match = *file;
2215 }
2216 if (fnmatch(match, filename, 0) == 0)
2217 return 1;
2218 }
2219 return 0;
2220}

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