/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.185 Revision 1.219
1/* 1/*
2 * Copyright 2003-2007 Gentoo Foundation 2 * Copyright 2003-2007 Gentoo Foundation
3 * Distributed under the terms of the GNU General Public License v2 3 * Distributed under the terms of the GNU General Public License v2
4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.185 2007/08/18 04:59:32 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.219 2010/12/06 20:43:48 vapier Exp $
5 * 5 *
6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10static const char *rcsid = "$Id: scanelf.c,v 1.219 2010/12/06 20:43:48 vapier Exp $";
11const char * const argv0 = "scanelf";
12
10#include "paxinc.h" 13#include "paxinc.h"
11
12static const char *rcsid = "$Id: scanelf.c,v 1.185 2007/08/18 04:59:32 vapier Exp $";
13#define argv0 "scanelf"
14 14
15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
16 16
17/* prototypes */ 17/* prototypes */
18static int file_matches_list(const char *filename, char **matchlist); 18static int file_matches_list(const char *filename, char **matchlist);
25static void scanelf_envpath(void); 25static void scanelf_envpath(void);
26static void usage(int status); 26static void usage(int status);
27static char **get_split_env(const char *envvar); 27static char **get_split_env(const char *envvar);
28static void parseenv(void); 28static void parseenv(void);
29static int parseargs(int argc, char *argv[]); 29static int parseargs(int argc, char *argv[]);
30static char *xstrdup(const char *s);
31static void *xmalloc(size_t size);
32static void *xrealloc(void *ptr, size_t size);
33static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
34#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
35static inline void xchrcat(char **dst, const char append, size_t *curr_len);
36static int rematch(const char *regex, const char *match, int cflags);
37 30
38/* variables to control behavior */ 31/* variables to control behavior */
39static char match_etypes[126] = ""; 32static char match_etypes[126] = "";
40static char *ldpaths[256]; 33static char *ldpaths[256];
41static char scan_ldpath = 0; 34static char scan_ldpath = 0;
44static char scan_archives = 0; 37static char scan_archives = 0;
45static char dir_recurse = 0; 38static char dir_recurse = 0;
46static char dir_crossmount = 1; 39static char dir_crossmount = 1;
47static char show_pax = 0; 40static char show_pax = 0;
48static char show_perms = 0; 41static char show_perms = 0;
42static char show_size = 0;
49static char show_phdr = 0; 43static char show_phdr = 0;
50static char show_textrel = 0; 44static char show_textrel = 0;
51static char show_rpath = 0; 45static char show_rpath = 0;
52static char show_needed = 0; 46static char show_needed = 0;
53static char show_interp = 0; 47static char show_interp = 0;
54static char show_bind = 0; 48static char show_bind = 0;
55static char show_soname = 0; 49static char show_soname = 0;
56static char show_textrels = 0; 50static char show_textrels = 0;
57static char show_banner = 1; 51static char show_banner = 1;
58static char show_endian = 0; 52static char show_endian = 0;
53static char show_osabi = 0;
54static char show_eabi = 0;
59static char be_quiet = 0; 55static char be_quiet = 0;
60static char be_verbose = 0; 56static char be_verbose = 0;
61static char be_wewy_wewy_quiet = 0; 57static char be_wewy_wewy_quiet = 0;
62static char be_semi_verbose = 0; 58static char be_semi_verbose = 0;
63static char *find_sym = NULL, *versioned_symname = NULL; 59static char *find_sym = NULL;
64static char *find_lib = NULL; 60static char *find_lib = NULL;
65static char *find_section = NULL; 61static char *find_section = NULL;
66static char *out_format = NULL; 62static char *out_format = NULL;
67static char *search_path = NULL; 63static char *search_path = NULL;
68static char fix_elf = 0; 64static char fix_elf = 0;
71 67
72static char **qa_textrels = NULL; 68static char **qa_textrels = NULL;
73static char **qa_execstack = NULL; 69static char **qa_execstack = NULL;
74static char **qa_wx_load = NULL; 70static char **qa_wx_load = NULL;
75 71
76int match_bits = 0; 72static int match_bits = 0;
77unsigned int match_perms = 0; 73static unsigned int match_perms = 0;
78caddr_t ldcache = 0; 74static void *ldcache = NULL;
79size_t ldcache_size = 0; 75static size_t ldcache_size = 0;
80unsigned long setpax = 0UL; 76static unsigned long setpax = 0UL;
81 77
82int has_objdump = 0; 78static int has_objdump = 0;
83
84static char *getstr_perms(const char *fname);
85static char *getstr_perms(const char *fname) {
86 struct stat st;
87 static char buf[8];
88
89 if ((stat(fname, &st)) == (-1))
90 return (char *) "";
91
92 snprintf(buf, sizeof(buf), "%o", st.st_mode);
93
94 return (char *) buf + 2;
95}
96 79
97/* find the path to a file by name */ 80/* find the path to a file by name */
98static char *which(const char *fname) 81static char *which(const char *fname)
99{ 82{
100 static char fullpath[BUFSIZ]; 83 static char fullpath[__PAX_UTILS_PATH_MAX];
101 char *path, *p; 84 char *path, *p;
102 85
103 path = getenv("PATH"); 86 path = getenv("PATH");
104 if (!path) 87 if (!path)
105 return NULL; 88 return NULL;
106 89
107 path = xstrdup(path); 90 path = xstrdup(path);
108 while ((p = strrchr(path, ':')) != NULL) { 91 while ((p = strrchr(path, ':')) != NULL) {
109 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname); 92 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
110 *p = 0; 93 *p = 0;
111 if (access(fullpath, R_OK) != (-1)) { 94 if (access(fullpath, R_OK) != -1) {
112 free(path); 95 free(path);
113 return (char *) fullpath; 96 return fullpath;
114 } 97 }
115 } 98 }
116 free(path); 99 free(path);
117 return NULL; 100 return NULL;
118} 101}
123 regex_t preg; 106 regex_t preg;
124 int ret; 107 int ret;
125 108
126 if ((match == NULL) || (regex == NULL)) 109 if ((match == NULL) || (regex == NULL))
127 return EXIT_FAILURE; 110 return EXIT_FAILURE;
128
129 111
130 if ((ret = regcomp(&preg, regex, cflags))) { 112 if ((ret = regcomp(&preg, regex, cflags))) {
131 char err[256]; 113 char err[256];
132 114
133 if (regerror(ret, &preg, err, sizeof(err))) 115 if (regerror(ret, &preg, err, sizeof(err)))
145 127
146/* sub-funcs for scanelf_file() */ 128/* sub-funcs for scanelf_file() */
147static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 129static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
148{ 130{
149 /* find the best SHT_DYNSYM and SHT_STRTAB sections */ 131 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
132
133 /* debug sections */
134 void *symtab = elf_findsecbyname(elf, ".symtab");
135 void *strtab = elf_findsecbyname(elf, ".strtab");
136 /* runtime sections */
137 void *dynsym = elf_findsecbyname(elf, ".dynsym");
138 void *dynstr = elf_findsecbyname(elf, ".dynstr");
139
150#define GET_SYMTABS(B) \ 140#define GET_SYMTABS(B) \
151 if (elf->elf_class == ELFCLASS ## B) { \ 141 if (elf->elf_class == ELFCLASS ## B) { \
152 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
153 /* debug sections */ \
154 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
155 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
156 /* runtime sections */ \
157 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
158 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
159 if (symtab && dynsym) { \ 142 if (symtab && dynsym) { \
143 Elf ## B ## _Shdr *esymtab = symtab; \
144 Elf ## B ## _Shdr *edynsym = dynsym; \
160 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ 145 *sym = (EGET(esymtab->sh_size) > EGET(edynsym->sh_size)) ? symtab : dynsym; \
161 } else { \ 146 } else \
162 *sym = (void*)(symtab ? symtab : dynsym); \ 147 *sym = symtab ? symtab : dynsym; \
163 } \
164 if (strtab && dynstr) { \ 148 if (strtab && dynstr) { \
149 Elf ## B ## _Shdr *estrtab = strtab; \
150 Elf ## B ## _Shdr *edynstr = dynstr; \
165 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ 151 *tab = (EGET(estrtab->sh_size) > EGET(edynstr->sh_size)) ? strtab : dynstr; \
166 } else { \ 152 } else \
167 *tab = (void*)(strtab ? strtab : dynstr); \ 153 *tab = strtab ? strtab : dynstr; \
168 } \
169 } 154 }
170 GET_SYMTABS(32) 155 GET_SYMTABS(32)
171 GET_SYMTABS(64) 156 GET_SYMTABS(64)
172} 157}
173 158
202 } \ 187 } \
203 } 188 }
204 SHOW_PAX(32) 189 SHOW_PAX(32)
205 SHOW_PAX(64) 190 SHOW_PAX(64)
206 } 191 }
207
208 192
209 if (fix_elf && setpax) { 193 if (fix_elf && setpax) {
210 /* set the chpax settings */ 194 /* set the chpax settings */
211 if (elf->elf_class == ELFCLASS32) { 195 if (elf->elf_class == ELFCLASS32) {
212 if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC) 196 if (EHDR32(elf->ehdr)->e_type == ET_DYN || EHDR32(elf->ehdr)->e_type == ET_EXEC)
271 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 255 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
272 found = found_relro; \ 256 found = found_relro; \
273 offset = 4; \ 257 offset = 4; \
274 check_flags = PF_X; \ 258 check_flags = PF_X; \
275 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 259 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
276 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \ 260 if (EGET(ehdr->e_type) == ET_DYN || EGET(ehdr->e_type) == ET_EXEC) \
277 if (multi_load++ > max_pt_load) \ 261 if (multi_load++ > max_pt_load) \
278 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \ 262 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
279 if (file_matches_list(elf->filename, qa_wx_load)) \ 263 if (file_matches_list(elf->filename, qa_wx_load)) \
280 continue; \ 264 continue; \
281 found = found_load; \ 265 found = found_load; \
298 } else if (elf->shdr != NULL) { \ 282 } else if (elf->shdr != NULL) { \
299 /* no program headers which means this is prob an object file */ \ 283 /* no program headers which means this is prob an object file */ \
300 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ 284 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
301 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ 285 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
302 char *str; \ 286 char *str; \
303 if ((void*)strtbl > (void*)elf->data_end) \ 287 if ((void*)strtbl > elf->data_end) \
304 goto skip_this_shdr##B; \ 288 goto skip_this_shdr##B; \
305 check_flags = SHF_WRITE|SHF_EXECINSTR; \ 289 check_flags = SHF_WRITE|SHF_EXECINSTR; \
306 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ 290 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
307 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ 291 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
308 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ 292 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
339 return NULL; 323 return NULL;
340 else 324 else
341 return ret; 325 return ret;
342} 326}
343 327
328/*
329 * See if this ELF contains a DT_TEXTREL tag in any of its
330 * PT_DYNAMIC sections.
331 */
344static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 332static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
345{ 333{
346 static const char *ret = "TEXTREL"; 334 static const char *ret = "TEXTREL";
347 unsigned long i; 335 unsigned long i;
348 336
359 Elf ## B ## _Off offset; \ 347 Elf ## B ## _Off offset; \
360 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 348 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
361 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 349 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
362 offset = EGET(phdr[i].p_offset); \ 350 offset = EGET(phdr[i].p_offset); \
363 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 351 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
364 dyn = DYN ## B (elf->data + offset); \ 352 dyn = DYN ## B (elf->vdata + offset); \
365 while (EGET(dyn->d_tag) != DT_NULL) { \ 353 while (EGET(dyn->d_tag) != DT_NULL) { \
366 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 354 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
367 *found_textrel = 1; \ 355 *found_textrel = 1; \
368 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 356 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
369 return (be_wewy_wewy_quiet ? NULL : ret); \ 357 return (be_wewy_wewy_quiet ? NULL : ret); \
379 return NULL; 367 return NULL;
380 else 368 else
381 return " - "; 369 return " - ";
382} 370}
383 371
372/*
373 * Scan the .text section to see if there are any relocations in it.
374 * Should rewrite this to check PT_LOAD sections that are marked
375 * Executable rather than the section named '.text'.
376 */
384static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) 377static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
385{ 378{
386 unsigned long s, r, rmax; 379 unsigned long s, r, rmax;
387 void *symtab_void, *strtab_void, *text_void; 380 void *symtab_void, *strtab_void, *text_void;
388 381
409 Elf ## B ## _Rela *rela; \ 402 Elf ## B ## _Rela *rela; \
410 /* search the section headers for relocations */ \ 403 /* search the section headers for relocations */ \
411 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ 404 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
412 uint32_t sh_type = EGET(shdr[s].sh_type); \ 405 uint32_t sh_type = EGET(shdr[s].sh_type); \
413 if (sh_type == SHT_REL) { \ 406 if (sh_type == SHT_REL) { \
414 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ 407 rel = REL ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
415 rela = NULL; \ 408 rela = NULL; \
416 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ 409 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
417 } else if (sh_type == SHT_RELA) { \ 410 } else if (sh_type == SHT_RELA) { \
418 rel = NULL; \ 411 rel = NULL; \
419 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ 412 rela = RELA ## B (elf->vdata + EGET(shdr[s].sh_offset)); \
420 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ 413 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
421 } else \ 414 } else \
422 continue; \ 415 continue; \
423 /* now see if any of the relocs are in the .text */ \ 416 /* now see if any of the relocs are in the .text */ \
424 for (r = 0; r < rmax; ++r) { \ 417 for (r = 0; r < rmax; ++r) { \
439 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ 432 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
440 if (be_verbose <= 2) continue; \ 433 if (be_verbose <= 2) continue; \
441 } else \ 434 } else \
442 *found_textrels = 1; \ 435 *found_textrels = 1; \
443 /* locate this relocation symbol name */ \ 436 /* locate this relocation symbol name */ \
444 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 437 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
445 if ((void*)sym > (void*)elf->data_end) { \ 438 if ((void*)sym > elf->data_end) { \
446 warn("%s: corrupt ELF symbol", elf->filename); \ 439 warn("%s: corrupt ELF symbol", elf->filename); \
447 continue; \ 440 continue; \
448 } \ 441 } \
449 sym_max = ELF ## B ## _R_SYM(r_info); \ 442 sym_max = ELF ## B ## _R_SYM(r_info); \
450 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 443 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
453 sym = NULL; \ 446 sym = NULL; \
454 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 447 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
455 /* show the raw details about this reloc */ \ 448 /* show the raw details about this reloc */ \
456 printf(" %s: ", elf->base_filename); \ 449 printf(" %s: ", elf->base_filename); \
457 if (sym && sym->st_name) \ 450 if (sym && sym->st_name) \
458 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \ 451 printf("%s", elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
459 else \ 452 else \
460 printf("(memory/data?)"); \ 453 printf("(memory/data?)"); \
461 printf(" [0x%lX]", (unsigned long)r_offset); \ 454 printf(" [0x%lX]", (unsigned long)r_offset); \
462 /* now try to find the closest symbol that this rel is probably in */ \ 455 /* now try to find the closest symbol that this rel is probably in */ \
463 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 456 sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
464 func = NULL; \ 457 func = NULL; \
465 offset_tmp = 0; \ 458 offset_tmp = 0; \
466 while (sym_max--) { \ 459 while (sym_max--) { \
467 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \ 460 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
468 func = sym; \ 461 func = sym; \
479 printf("%s", func_name); \ 472 printf("%s", func_name); \
480 } else \ 473 } else \
481 printf("(optimized out)"); \ 474 printf("(optimized out)"); \
482 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 475 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
483 if (be_verbose && has_objdump) { \ 476 if (be_verbose && has_objdump) { \
477 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
484 char *sysbuf; \ 478 char *sysbuf; \
485 size_t syslen; \ 479 size_t syslen; \
480 int sysret; \
486 const char sysfmt[] = "objdump -r -R -d -w -l --start-address=0x%lX --stop-address=0x%lX %s | grep --color -i -C 3 '.*[[:space:]]%lX:[[:space:]]*R_.*'\n"; \ 481 const char sysfmt[] = "objdump -r -R -d -w -l --start-address=0x%lX --stop-address=0x%lX %s | grep --color -i -C 3 '.*[[:space:]]%lX:[[:space:]]*R_.*'\n"; \
487 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \ 482 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
488 sysbuf = xmalloc(syslen); \ 483 sysbuf = xmalloc(syslen); \
489 if (sysbuf) { \
490 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
491 if (end_addr < r_offset) \ 484 if (end_addr < r_offset) \
492 /* not uncommon when things are optimized out */ \ 485 /* not uncommon when things are optimized out */ \
493 end_addr = r_offset + 0x100; \ 486 end_addr = r_offset + 0x100; \
494 snprintf(sysbuf, syslen, sysfmt, \ 487 snprintf(sysbuf, syslen, sysfmt, \
495 (unsigned long)offset_tmp, \ 488 (unsigned long)offset_tmp, \
496 (unsigned long)end_addr, \ 489 (unsigned long)end_addr, \
497 elf->filename, \ 490 elf->filename, \
498 (unsigned long)r_offset); \ 491 (unsigned long)r_offset); \
499 fflush(stdout); \ 492 fflush(stdout); \
500 system(sysbuf); \ 493 sysret = system(sysbuf); \
501 fflush(stdout); \ 494 fflush(stdout); \
502 free(sysbuf); \ 495 free(sysbuf); \
503 } \
504 } \ 496 } \
505 } \ 497 } \
506 } } 498 } }
507 SHOW_TEXTRELS(32) 499 SHOW_TEXTRELS(32)
508 SHOW_TEXTRELS(64) 500 SHOW_TEXTRELS(64)
562 /* Just scan dynamic headers */ \ 554 /* Just scan dynamic headers */ \
563 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 555 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
564 offset = EGET(phdr[i].p_offset); \ 556 offset = EGET(phdr[i].p_offset); \
565 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 557 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
566 /* Just scan dynamic RPATH/RUNPATH headers */ \ 558 /* Just scan dynamic RPATH/RUNPATH headers */ \
567 dyn = DYN ## B (elf->data + offset); \ 559 dyn = DYN ## B (elf->vdata + offset); \
568 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 560 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
569 if (word == DT_RPATH) { \ 561 if (word == DT_RPATH) { \
570 r = &rpath; \ 562 r = &rpath; \
571 } else if (word == DT_RUNPATH) { \ 563 } else if (word == DT_RUNPATH) { \
572 r = &runpath; \ 564 r = &runpath; \
576 } \ 568 } \
577 /* Verify the memory is somewhat sane */ \ 569 /* Verify the memory is somewhat sane */ \
578 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 570 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
579 if (offset < (Elf ## B ## _Off)elf->len) { \ 571 if (offset < (Elf ## B ## _Off)elf->len) { \
580 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 572 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
581 *r = (char*)(elf->data + offset); \ 573 *r = elf->data + offset; \
582 /* cache the length in case we need to nuke this section later on */ \ 574 /* cache the length in case we need to nuke this section later on */ \
583 if (fix_elf) \ 575 if (fix_elf) \
584 offset = strlen(*r); \ 576 offset = strlen(*r); \
585 /* If quiet, don't output paths in ld.so.conf */ \ 577 /* If quiet, don't output paths in ld.so.conf */ \
586 if (be_quiet) { \ 578 if (be_quiet) { \
702 694
703#if defined(__GLIBC__) || defined(__UCLIBC__) 695#if defined(__GLIBC__) || defined(__UCLIBC__)
704 696
705static char *lookup_cache_lib(elfobj *elf, char *fname) 697static char *lookup_cache_lib(elfobj *elf, char *fname)
706{ 698{
707 int fd = 0; 699 int fd;
708 char *strs; 700 char *strs;
709 static char buf[__PAX_UTILS_PATH_MAX] = ""; 701 static char buf[__PAX_UTILS_PATH_MAX] = "";
710 const char *cachefile = "/etc/ld.so.cache"; 702 const char cachefile[] = "/etc/ld.so.cache";
711 struct stat st; 703 struct stat st;
712 704
713 typedef struct { 705 typedef struct {
714 char magic[LDSO_CACHE_MAGIC_LEN]; 706 char magic[LDSO_CACHE_MAGIC_LEN];
715 char version[LDSO_CACHE_VER_LEN]; 707 char version[LDSO_CACHE_VER_LEN];
725 libentry_t *libent; 717 libentry_t *libent;
726 718
727 if (fname == NULL) 719 if (fname == NULL)
728 return NULL; 720 return NULL;
729 721
730 if (ldcache == 0) { 722 if (ldcache == NULL) {
731 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1) 723 if (stat(cachefile, &st))
724 return NULL;
725
726 fd = open(cachefile, O_RDONLY);
727 if (fd == -1)
732 return NULL; 728 return NULL;
733 729
734 /* cache these values so we only map/unmap the cache file once */ 730 /* cache these values so we only map/unmap the cache file once */
735 ldcache_size = st.st_size; 731 ldcache_size = st.st_size;
736 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0); 732 header = ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
737
738 close(fd); 733 close(fd);
739 734
740 if (ldcache == (caddr_t)-1) { 735 if (ldcache == MAP_FAILED) {
741 ldcache = 0; 736 ldcache = NULL;
742 return NULL; 737 return NULL;
743 } 738 }
744 739
745 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN)) 740 if (memcmp(header->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN) ||
741 memcmp(header->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
742 {
743 munmap(ldcache, ldcache_size);
744 ldcache = NULL;
746 return NULL; 745 return NULL;
747 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
748 return NULL;
749 } 746 }
747 } else
748 header = ldcache;
750 749
751 header = (header_t *) ldcache;
752 libent = (libentry_t *) (ldcache + sizeof(header_t)); 750 libent = ldcache + sizeof(header_t);
753 strs = (char *) &libent[header->nlibs]; 751 strs = (char *) &libent[header->nlibs];
754 752
755 for (fd = 0; fd < header->nlibs; fd++) { 753 for (fd = 0; fd < header->nlibs; ++fd) {
756 /* this should be more fine grained, but for now we assume that 754 /* This should be more fine grained, but for now we assume that
757 * diff arches will not be cached together. and we ignore the 755 * diff arches will not be cached together, and we ignore the
758 * the different multilib mips cases. */ 756 * the different multilib mips cases.
757 */
759 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK)) 758 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
760 continue; 759 continue;
761 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK)) 760 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
762 continue; 761 continue;
763 762
764 if (strcmp(fname, strs + libent[fd].sooffset) != 0) 763 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
765 continue; 764 continue;
765
766 /* Return first hit because that is how the ldso rolls */
766 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 767 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
768 break;
767 } 769 }
770
768 return buf; 771 return buf;
769} 772}
773
770#elif defined(__NetBSD__) 774#elif defined(__NetBSD__)
771static char *lookup_cache_lib(elfobj *elf, char *fname) 775static char *lookup_cache_lib(elfobj *elf, char *fname)
772{ 776{
773 static char buf[__PAX_UTILS_PATH_MAX] = ""; 777 static char buf[__PAX_UTILS_PATH_MAX] = "";
774 static struct stat st; 778 static struct stat st;
791 795
792 /* not found in any path */ 796 /* not found in any path */
793 return NULL; 797 return NULL;
794} 798}
795#else 799#else
800#ifdef __ELF__
796#warning Cache support not implemented for your target 801#warning Cache support not implemented for your target
802#endif
797static char *lookup_cache_lib(elfobj *elf, char *fname) 803static char *lookup_cache_lib(elfobj *elf, char *fname)
798{ 804{
799 return NULL; 805 return NULL;
800} 806}
801#endif 807#endif
821 Elf ## B ## _Off offset; \ 827 Elf ## B ## _Off offset; \
822 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
823 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 829 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
824 offset = EGET(phdr[i].p_offset); \ 830 offset = EGET(phdr[i].p_offset); \
825 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 831 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
826 dyn = DYN ## B (elf->data + offset); \ 832 dyn = DYN ## B (elf->vdata + offset); \
827 while (EGET(dyn->d_tag) != DT_NULL) { \ 833 while (EGET(dyn->d_tag) != DT_NULL) { \
828 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 834 if (EGET(dyn->d_tag) == DT_NEEDED) { \
829 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 835 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
830 if (offset >= (Elf ## B ## _Off)elf->len) { \ 836 if (offset >= (Elf ## B ## _Off)elf->len) { \
831 ++dyn; \ 837 ++dyn; \
832 continue; \ 838 continue; \
833 } \ 839 } \
834 needed = (char*)(elf->data + offset); \ 840 needed = elf->data + offset; \
835 if (op == 0) { \ 841 if (op == 0) { \
836 if (!be_wewy_wewy_quiet) { \ 842 if (!be_wewy_wewy_quiet) { \
837 if (*found_needed) xchrcat(ret, ',', ret_len); \ 843 if (*found_needed) xchrcat(ret, ',', ret_len); \
838 if (use_ldcache) \ 844 if (use_ldcache) \
839 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 845 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
897 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 903 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
898 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 904 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
899 dynamic = 1; \ 905 dynamic = 1; \
900 offset = EGET(phdr[i].p_offset); \ 906 offset = EGET(phdr[i].p_offset); \
901 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 907 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
902 dyn = DYN ## B (elf->data + offset); \ 908 dyn = DYN ## B (elf->vdata + offset); \
903 while (EGET(dyn->d_tag) != DT_NULL) { \ 909 while (EGET(dyn->d_tag) != DT_NULL) { \
904 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 910 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
905 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \ 911 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
906 { \ 912 { \
907 if (be_quiet) return NULL; \ 913 if (be_quiet) return NULL; \
920 /* don't output anything if quiet mode and the ELF is static or not setuid */ 926 /* don't output anything if quiet mode and the ELF is static or not setuid */
921 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) { 927 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
922 return NULL; 928 return NULL;
923 } else { 929 } else {
924 *found_bind = 1; 930 *found_bind = 1;
925 return (char *) (dynamic ? "LAZY" : "STATIC"); 931 return (char *)(dynamic ? "LAZY" : "STATIC");
926 } 932 }
927} 933}
928static char *scanelf_file_soname(elfobj *elf, char *found_soname) 934static char *scanelf_file_soname(elfobj *elf, char *found_soname)
929{ 935{
930 unsigned long i; 936 unsigned long i;
942 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 948 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
943 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 949 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
944 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 950 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
945 Elf ## B ## _Off offset; \ 951 Elf ## B ## _Off offset; \
946 /* only look for soname in shared objects */ \ 952 /* only look for soname in shared objects */ \
947 if (ehdr->e_type != ET_DYN) \ 953 if (EGET(ehdr->e_type) != ET_DYN) \
948 return NULL; \ 954 return NULL; \
949 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 955 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
950 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 956 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
951 offset = EGET(phdr[i].p_offset); \ 957 offset = EGET(phdr[i].p_offset); \
952 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 958 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
953 dyn = DYN ## B (elf->data + offset); \ 959 dyn = DYN ## B (elf->vdata + offset); \
954 while (EGET(dyn->d_tag) != DT_NULL) { \ 960 while (EGET(dyn->d_tag) != DT_NULL) { \
955 if (EGET(dyn->d_tag) == DT_SONAME) { \ 961 if (EGET(dyn->d_tag) == DT_SONAME) { \
956 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 962 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
957 if (offset >= (Elf ## B ## _Off)elf->len) { \ 963 if (offset >= (Elf ## B ## _Off)elf->len) { \
958 ++dyn; \ 964 ++dyn; \
959 continue; \ 965 continue; \
960 } \ 966 } \
961 soname = (char*)(elf->data + offset); \ 967 soname = elf->data + offset; \
962 *found_soname = 1; \ 968 *found_soname = 1; \
963 return (be_wewy_wewy_quiet ? NULL : soname); \ 969 return (be_wewy_wewy_quiet ? NULL : soname); \
964 } \ 970 } \
965 ++dyn; \ 971 ++dyn; \
966 } \ 972 } \
970 } 976 }
971 977
972 return NULL; 978 return NULL;
973} 979}
974 980
981/*
982 * We support the symbol form:
983 * [%[modifiers]%][[+-]<symbol name>][,[.....]]
984 * If the symbol name is empty, then all symbols are matched.
985 * If the symbol name is a glob ("*"), then all symbols are dumped (debug).
986 * Do not rely on this output format at all.
987 * Otherwise the symbol name is used to search (either regex or string compare).
988 * If the first char of the symbol name is a plus ("+"), then only match
989 * defined symbols. If it's a minus ("-"), only match undefined symbols.
990 * Putting modifiers in between the percent signs allows for more in depth
991 * filters. There are groups of modifiers. If you don't specify a member
992 * of a group, then all types in that group are matched. The current
993 * groups and their types are:
994 * STT group: STT_NOTYPE:n STT_OBJECT:o STT_FUNC:f SST_FILE:F
995 * STB group: STB_LOCAL:l STB_GLOBAL:g STB_WEAK:w
996 * SHN group: SHN_UNDEF:u SHN_ABS:a SHN_COMMON:c {defined}:d
997 * The "defined" value in the SHN group does not correspond to a SHN_xxx define.
998 * You can search for multiple symbols at once by seperating with a comma (",").
999 *
1000 * Some examples:
1001 * ELFs with a weak function "foo":
1002 * scanelf -s %wf%foo <ELFs>
1003 * ELFs that define the symbol "main":
1004 * scanelf -s +main <ELFs>
1005 * scanelf -s %d%main <ELFs>
1006 * ELFs that refer to the undefined symbol "brk":
1007 * scanelf -s -brk <ELFs>
1008 * scanelf -s %u%brk <ELFs>
1009 * All global defined objects in an ELF:
1010 * scanelf -s %ogd% <ELF>
1011 */
1012static void
1013scanelf_match_symname(elfobj *elf, char *found_sym, char **ret, size_t *ret_len, const char *symname,
1014 unsigned int stt, unsigned int stb, unsigned int shn, unsigned long size)
1015{
1016 char *this_sym, *next_sym, saved = saved;
1017
1018 /* allow the user to specify a comma delimited list of symbols to search for */
1019 next_sym = NULL;
1020 do {
1021 bool inc_notype, inc_object, inc_func, inc_file,
1022 inc_local, inc_global, inc_weak,
1023 inc_def, inc_undef, inc_abs, inc_common;
1024
1025 if (next_sym) {
1026 next_sym[-1] = saved;
1027 this_sym = next_sym;
1028 } else
1029 this_sym = find_sym;
1030 if ((next_sym = strchr(this_sym, ','))) {
1031 /* make parsing easier by killing the comma temporarily */
1032 saved = *next_sym;
1033 *next_sym = '\0';
1034 next_sym += 1;
1035 }
1036
1037 /* symbol selection! */
1038 inc_notype = inc_object = inc_func = inc_file = \
1039 inc_local = inc_global = inc_weak = \
1040 inc_def = inc_undef = inc_abs = inc_common = \
1041 (*this_sym != '%');
1042
1043 /* parse the contents of %...% */
1044 if (!inc_notype) {
1045 while (*(this_sym++)) {
1046 if (*this_sym == '%') {
1047 ++this_sym;
1048 break;
1049 }
1050 switch (*this_sym) {
1051 case 'n': inc_notype = true; break;
1052 case 'o': inc_object = true; break;
1053 case 'f': inc_func = true; break;
1054 case 'F': inc_file = true; break;
1055 case 'l': inc_local = true; break;
1056 case 'g': inc_global = true; break;
1057 case 'w': inc_weak = true; break;
1058 case 'd': inc_def = true; break;
1059 case 'u': inc_undef = true; break;
1060 case 'a': inc_abs = true; break;
1061 case 'c': inc_common = true; break;
1062 default: err("invalid symbol selector '%c'", *this_sym);
1063 }
1064 }
1065
1066 /* If no types are matched, not match all */
1067 if (!inc_notype && !inc_object && !inc_func && !inc_file)
1068 inc_notype = inc_object = inc_func = inc_file = true;
1069 if (!inc_local && !inc_global && !inc_weak)
1070 inc_local = inc_global = inc_weak = true;
1071 if (!inc_def && !inc_undef && !inc_abs && !inc_common)
1072 inc_def = inc_undef = inc_abs = inc_common = true;
1073
1074 /* backwards compat for defined/undefined short hand */
1075 } else if (*this_sym == '+') {
1076 inc_undef = false;
1077 ++this_sym;
1078 } else if (*this_sym == '-') {
1079 inc_def = inc_abs = inc_common = false;
1080 ++this_sym;
1081 }
1082
1083 /* filter symbols */
1084 if ((!inc_notype && stt == STT_NOTYPE) || \
1085 (!inc_object && stt == STT_OBJECT) || \
1086 (!inc_func && stt == STT_FUNC ) || \
1087 (!inc_file && stt == STT_FILE ) || \
1088 (!inc_local && stb == STB_LOCAL ) || \
1089 (!inc_global && stb == STB_GLOBAL) || \
1090 (!inc_weak && stb == STB_WEAK ) || \
1091 (!inc_def && shn && shn < SHN_LORESERVE) || \
1092 (!inc_undef && shn == SHN_UNDEF ) || \
1093 (!inc_abs && shn == SHN_ABS ) || \
1094 (!inc_common && shn == SHN_COMMON))
1095 continue;
1096
1097 if (*this_sym == '*') {
1098 /* a "*" symbol gets you debug output */
1099 printf("%s(%s) %5lX %15s %15s %15s %s\n",
1100 ((*found_sym == 0) ? "\n\t" : "\t"),
1101 elf->base_filename,
1102 size,
1103 get_elfstttype(stt),
1104 get_elfstbtype(stb),
1105 get_elfshntype(shn),
1106 symname);
1107 goto matched;
1108
1109 } else {
1110 if (g_match) {
1111 /* regex match the symbol */
1112 if (rematch(this_sym, symname, REG_EXTENDED) != 0)
1113 continue;
1114
1115 } else if (*this_sym) {
1116 /* give empty symbols a "pass", else do a normal compare */
1117 const size_t len = strlen(this_sym);
1118 if (!(strncmp(this_sym, symname, len) == 0 &&
1119 /* Accept unversioned symbol names */
1120 (symname[len] == '\0' || symname[len] == '@')))
1121 continue;
1122 }
1123
1124 if (be_semi_verbose) {
1125 char buf[1024];
1126 snprintf(buf, sizeof(buf), "%lX %s %s",
1127 size,
1128 get_elfstttype(stt),
1129 this_sym);
1130 *ret = xstrdup(buf);
1131 } else {
1132 if (*ret) xchrcat(ret, ',', ret_len);
1133 xstrcat(ret, symname, ret_len);
1134 }
1135
1136 goto matched;
1137 }
1138 } while (next_sym);
1139
1140 return;
1141
1142 matched:
1143 *found_sym = 1;
1144 if (next_sym)
1145 next_sym[-1] = saved;
1146}
1147
975static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1148static char *scanelf_file_sym(elfobj *elf, char *found_sym)
976{ 1149{
977 unsigned long i; 1150 unsigned long i;
978 char *ret; 1151 char *ret;
979 void *symtab_void, *strtab_void; 1152 void *symtab_void, *strtab_void;
980 1153
981 if (!find_sym) return NULL; 1154 if (!find_sym) return NULL;
982 ret = find_sym; 1155 ret = NULL;
983 1156
984 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 1157 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
985 1158
986 if (symtab_void && strtab_void) { 1159 if (symtab_void && strtab_void) {
987#define FIND_SYM(B) \ 1160#define FIND_SYM(B) \
988 if (elf->elf_class == ELFCLASS ## B) { \ 1161 if (elf->elf_class == ELFCLASS ## B) { \
989 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 1162 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
990 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 1163 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
991 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 1164 Elf ## B ## _Sym *sym = SYM ## B (elf->vdata + EGET(symtab->sh_offset)); \
992 unsigned long cnt = EGET(symtab->sh_entsize); \ 1165 unsigned long cnt = EGET(symtab->sh_entsize); \
993 char *symname; \ 1166 char *symname; \
1167 size_t ret_len = 0; \
994 if (cnt) \ 1168 if (cnt) \
995 cnt = EGET(symtab->sh_size) / cnt; \ 1169 cnt = EGET(symtab->sh_size) / cnt; \
996 for (i = 0; i < cnt; ++i) { \ 1170 for (i = 0; i < cnt; ++i) { \
1171 if ((void*)sym > elf->data_end) { \
1172 warnf("%s: corrupt ELF symbols - aborting", elf->filename); \
1173 goto break_out; \
1174 } \
997 if (sym->st_name) { \ 1175 if (sym->st_name) { \
998 /* make sure the symbol name is in acceptable memory range */ \ 1176 /* make sure the symbol name is in acceptable memory range */ \
999 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 1177 symname = elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name); \
1000 if ((void*)symname > (void*)elf->data_end) { \ 1178 if ((void*)symname > elf->data_end) { \
1001 warnf("%s: corrupt ELF symbols", elf->filename); \ 1179 warnf("%s: corrupt ELF symbols", elf->filename); \
1002 ++sym; \ 1180 ++sym; \
1003 continue; \ 1181 continue; \
1004 } \ 1182 } \
1005 /* debug display ... show all symbols and some extra info */ \ 1183 scanelf_match_symname(elf, found_sym, \
1006 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \ 1184 &ret, &ret_len, symname, \
1007 printf("%s(%s) %5lX %15s %s %s\n", \ 1185 ELF##B##_ST_TYPE(EGET(sym->st_info)), \
1008 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1186 ELF##B##_ST_BIND(EGET(sym->st_info)), \
1009 elf->base_filename, \ 1187 EGET(sym->st_shndx), \
1010 (unsigned long)sym->st_size, \ 1188 /* st_size can be 64bit, but no one is really that big, so screw em */ \
1011 get_elfstttype(sym->st_info), \ 1189 EGET(sym->st_size)); \
1012 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
1013 *found_sym = 1; \
1014 } else { \
1015 /* allow the user to specify a comma delimited list of symbols to search for */ \
1016 char *this_sym, *this_sym_ver, *next_sym; \
1017 this_sym = ret; \
1018 this_sym_ver = versioned_symname; \
1019 do { \
1020 next_sym = strchr(this_sym, ','); \
1021 if (next_sym == NULL) \
1022 next_sym = this_sym + strlen(this_sym); \
1023 /* do we want a defined symbol ? */ \
1024 if (*this_sym == '+') { \
1025 if (sym->st_shndx == SHN_UNDEF) \
1026 goto skip_this_sym##B; \
1027 ++this_sym; \
1028 ++this_sym_ver; \
1029 /* do we want an undefined symbol ? */ \
1030 } else if (*this_sym == '-') { \
1031 if (sym->st_shndx != SHN_UNDEF) \
1032 goto skip_this_sym##B; \
1033 ++this_sym; \
1034 ++this_sym_ver; \
1035 } \
1036 /* ok, lets compare the name now */ \
1037 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
1038 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
1039 if (be_semi_verbose) { \
1040 char buf[126]; \
1041 snprintf(buf, sizeof(buf), "%lX %s %s", \
1042 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
1043 ret = buf; \
1044 } else \
1045 ret = this_sym; \
1046 (*found_sym)++; \
1047 goto break_out; \
1048 } \
1049 skip_this_sym##B: this_sym = next_sym + 1; \
1050 } while (*next_sym != '\0'); \
1051 } \
1052 } \ 1190 } \
1053 ++sym; \ 1191 ++sym; \
1054 } } 1192 } }
1055 FIND_SYM(32) 1193 FIND_SYM(32)
1056 FIND_SYM(64) 1194 FIND_SYM(64)
1064 if (be_quiet) 1202 if (be_quiet)
1065 return NULL; 1203 return NULL;
1066 else 1204 else
1067 return (char *)" - "; 1205 return (char *)" - ";
1068} 1206}
1069
1070 1207
1071static char *scanelf_file_sections(elfobj *elf, char *found_section) 1208static char *scanelf_file_sections(elfobj *elf, char *found_section)
1072{ 1209{
1073 if (!find_section) 1210 if (!find_section)
1074 return NULL; 1211 return NULL;
1096 else 1233 else
1097 return (char *)" - "; 1234 return (char *)" - ";
1098} 1235}
1099 1236
1100/* scan an elf file and show all the fun stuff */ 1237/* scan an elf file and show all the fun stuff */
1101#define prints(str) write(fileno(stdout), str, strlen(str)) 1238#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1102static int scanelf_elfobj(elfobj *elf) 1239static int scanelf_elfobj(elfobj *elf)
1103{ 1240{
1104 unsigned long i; 1241 unsigned long i;
1105 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1242 char found_pax, found_phdr, found_relro, found_load, found_textrel,
1106 found_rpath, found_needed, found_interp, found_bind, found_soname, 1243 found_rpath, found_needed, found_interp, found_bind, found_soname,
1120 printf("%s: scanning file\n", elf->filename); 1257 printf("%s: scanning file\n", elf->filename);
1121 1258
1122 /* init output buffer */ 1259 /* init output buffer */
1123 if (!out_buffer) { 1260 if (!out_buffer) {
1124 out_len = sizeof(char) * 80; 1261 out_len = sizeof(char) * 80;
1125 out_buffer = (char*)xmalloc(out_len); 1262 out_buffer = xmalloc(out_len);
1126 } 1263 }
1127 *out_buffer = '\0'; 1264 *out_buffer = '\0';
1128 1265
1129 /* show the header */ 1266 /* show the header */
1130 if (!be_quiet && show_banner) { 1267 if (!be_quiet && show_banner) {
1145 case 'r': prints("RPATH "); break; 1282 case 'r': prints("RPATH "); break;
1146 case 'M': prints("CLASS "); break; 1283 case 'M': prints("CLASS "); break;
1147 case 'n': prints("NEEDED "); break; 1284 case 'n': prints("NEEDED "); break;
1148 case 'i': prints("INTERP "); break; 1285 case 'i': prints("INTERP "); break;
1149 case 'b': prints("BIND "); break; 1286 case 'b': prints("BIND "); break;
1287 case 'Z': prints("SIZE "); break;
1150 case 'S': prints("SONAME "); break; 1288 case 'S': prints("SONAME "); break;
1151 case 's': prints("SYM "); break; 1289 case 's': prints("SYM "); break;
1152 case 'N': prints("LIB "); break; 1290 case 'N': prints("LIB "); break;
1153 case 'T': prints("TEXTRELS "); break; 1291 case 'T': prints("TEXTRELS "); break;
1154 case 'k': prints("SECTION "); break; 1292 case 'k': prints("SECTION "); break;
1155 case 'a': prints("ARCH "); break; 1293 case 'a': prints("ARCH "); break;
1294 case 'I': prints("OSABI "); break;
1295 case 'Y': prints("EABI "); break;
1156 case 'O': prints("PERM "); break; 1296 case 'O': prints("PERM "); break;
1157 case 'D': prints("ENDIAN "); break; 1297 case 'D': prints("ENDIAN "); break;
1158 default: warnf("'%c' has no title ?", out_format[i]); 1298 default: warnf("'%c' has no title ?", out_format[i]);
1159 } 1299 }
1160 } 1300 }
1166 1306
1167 /* dump all the good stuff */ 1307 /* dump all the good stuff */
1168 for (i = 0; out_format[i]; ++i) { 1308 for (i = 0; out_format[i]; ++i) {
1169 const char *out; 1309 const char *out;
1170 const char *tmp; 1310 const char *tmp;
1171 1311 static char ubuf[sizeof(unsigned long)*2];
1172 if (!IS_MODIFIER(out_format[i])) { 1312 if (!IS_MODIFIER(out_format[i])) {
1173 xchrcat(&out_buffer, out_format[i], &out_len); 1313 xchrcat(&out_buffer, out_format[i], &out_len);
1174 continue; 1314 continue;
1175 } 1315 }
1176 1316
1214 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1354 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1215 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break; 1355 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
1216 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 1356 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1217 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break; 1357 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1218 case 'D': out = get_endian(elf); break; 1358 case 'D': out = get_endian(elf); break;
1219 case 'O': out = getstr_perms(elf->filename); break; 1359 case 'O': out = strfileperms(elf->filename); break;
1220 case 'n': 1360 case 'n':
1221 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; 1361 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
1222 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1362 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1223 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1363 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1224 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1364 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1225 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1365 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1226 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1366 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1227 case 'a': out = get_elfemtype(elf); break; 1367 case 'a': out = get_elfemtype(elf); break;
1368 case 'I': out = get_elfosabi(elf); break;
1369 case 'Y': out = get_elf_eabi(elf); break;
1370 case 'Z': snprintf(ubuf, sizeof(ubuf), "%lu", (unsigned long)elf->len); out = ubuf; break;;
1228 default: warnf("'%c' has no scan code?", out_format[i]); 1371 default: warnf("'%c' has no scan code?", out_format[i]);
1229 } 1372 }
1230 if (out) { 1373 if (out)
1231 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1232 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1233 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1234 else
1235 xstrcat(&out_buffer, out, &out_len); 1374 xstrcat(&out_buffer, out, &out_len);
1236 }
1237 } 1375 }
1238 1376
1239#define FOUND_SOMETHING() \ 1377#define FOUND_SOMETHING() \
1240 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1378 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
1241 found_rpath || found_needed || found_interp || found_bind || \ 1379 found_rpath || found_needed || found_interp || found_bind || \
1278 if (strlen(match_etypes)) { 1416 if (strlen(match_etypes)) {
1279 char sbuf[126]; 1417 char sbuf[126];
1280 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1418 strncpy(sbuf, match_etypes, sizeof(sbuf));
1281 if (strchr(match_etypes, ',') != NULL) { 1419 if (strchr(match_etypes, ',') != NULL) {
1282 char *p; 1420 char *p;
1283 while((p = strrchr(sbuf, ',')) != NULL) { 1421 while ((p = strrchr(sbuf, ',')) != NULL) {
1284 *p = 0; 1422 *p = 0;
1285 if (etype_lookup(p+1) == get_etype(elf)) 1423 if (etype_lookup(p+1) == get_etype(elf))
1286 goto label_ret; 1424 goto label_ret;
1287 } 1425 }
1288 } 1426 }
1308 1446
1309 ar = ar_open_fd(filename, fd); 1447 ar = ar_open_fd(filename, fd);
1310 if (ar == NULL) 1448 if (ar == NULL)
1311 return 1; 1449 return 1;
1312 1450
1313 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0); 1451 ar_buffer = mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1314 while ((m=ar_next(ar)) != NULL) { 1452 while ((m = ar_next(ar)) != NULL) {
1453 off_t cur_pos = lseek(fd, 0, SEEK_CUR);
1454 if (cur_pos == -1)
1455 errp("lseek() failed");
1315 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size); 1456 elf = readelf_buffer(m->name, ar_buffer + cur_pos, m->size);
1316 if (elf) { 1457 if (elf) {
1317 scanelf_elfobj(elf); 1458 scanelf_elfobj(elf);
1318 unreadelf(elf); 1459 unreadelf(elf);
1319 } 1460 }
1320 } 1461 }
1448 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1589 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1449 if ((p = strrchr(path, '\r')) != NULL) 1590 if ((p = strrchr(path, '\r')) != NULL)
1450 *p = 0; 1591 *p = 0;
1451 if ((p = strchr(path, '\n')) != NULL) 1592 if ((p = strchr(path, '\n')) != NULL)
1452 *p = 0; 1593 *p = 0;
1453#ifdef __linux__ 1594
1454 // recursive includes of the same file will make this segfault. 1595 /* recursive includes of the same file will make this segfault. */
1455 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1596 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1456 glob64_t gl; 1597 glob_t gl;
1457 size_t x; 1598 size_t x;
1458 char gpath[__PAX_UTILS_PATH_MAX]; 1599 char gpath[__PAX_UTILS_PATH_MAX];
1459 1600
1460 memset(gpath, 0, sizeof(gpath)); 1601 memset(gpath, 0, sizeof(gpath));
1461 1602
1462 if (path[8] != '/') 1603 if (path[8] != '/')
1463 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1604 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]);
1464 else 1605 else
1465 strncpy(gpath, &path[8], sizeof(gpath)); 1606 strncpy(gpath, &path[8], sizeof(gpath));
1466 1607
1467 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1608 if (glob(gpath, 0, NULL, &gl) == 0) {
1468 for (x = 0; x < gl.gl_pathc; ++x) { 1609 for (x = 0; x < gl.gl_pathc; ++x) {
1469 /* try to avoid direct loops */ 1610 /* try to avoid direct loops */
1470 if (strcmp(gl.gl_pathv[x], fname) == 0) 1611 if (strcmp(gl.gl_pathv[x], fname) == 0)
1471 continue; 1612 continue;
1472 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1613 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1473 if (i + 1 >= ARRAY_SIZE(ldpaths)) { 1614 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1474 globfree64(&gl); 1615 globfree(&gl);
1475 return i; 1616 return i;
1476 } 1617 }
1477 } 1618 }
1478 globfree64 (&gl); 1619 globfree(&gl);
1479 continue; 1620 continue;
1480 } 1621 }
1481 } 1622 }
1482#endif 1623
1483 if (*path != '/') 1624 if (*path != '/')
1484 continue; 1625 continue;
1485 1626
1486 ldpaths[i++] = xstrdup(path); 1627 ldpaths[i++] = xstrdup(path);
1487 1628
1492 1633
1493 fclose(fp); 1634 fclose(fp);
1494 return i; 1635 return i;
1495} 1636}
1496 1637
1497#elif defined(__FreeBSD__) || (__DragonFly__) 1638#elif defined(__FreeBSD__) || defined(__DragonFly__)
1498 1639
1499static int load_ld_cache_config(int i, const char *fname) 1640static int load_ld_cache_config(int i, const char *fname)
1500{ 1641{
1501 FILE *fp = NULL; 1642 FILE *fp = NULL;
1502 char *b = NULL, *p; 1643 char *b = NULL, *p;
1514 { 1655 {
1515 fclose(fp); 1656 fclose(fp);
1516 return i; 1657 return i;
1517 } 1658 }
1518 1659
1519 b = (char*)malloc(hdr.dirlistlen+1); 1660 b = xmalloc(hdr.dirlistlen + 1);
1520 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) { 1661 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1521 fclose(fp); 1662 fclose(fp);
1522 free(b); 1663 free(b);
1523 return i; 1664 return i;
1524 } 1665 }
1536 fclose(fp); 1677 fclose(fp);
1537 return i; 1678 return i;
1538} 1679}
1539 1680
1540#else 1681#else
1541 1682#ifdef __ELF__
1542#warning Cache config support not implemented for your target 1683#warning Cache config support not implemented for your target
1684#endif
1543static int load_ld_cache_config(int i, const char *fname) 1685static int load_ld_cache_config(int i, const char *fname)
1544{ 1686{
1545 memset(ldpaths, 0x00, sizeof(ldpaths)); 1687 memset(ldpaths, 0x00, sizeof(ldpaths));
1688 return 0;
1546} 1689}
1547
1548#endif 1690#endif
1549 1691
1550/* scan /etc/ld.so.conf for paths */ 1692/* scan /etc/ld.so.conf for paths */
1551static void scanelf_ldpath(void) 1693static void scanelf_ldpath(void)
1552{ 1694{
1557 err("Unable to load any paths from ld.so.conf"); 1699 err("Unable to load any paths from ld.so.conf");
1558 1700
1559 scan_l = scan_ul = scan_ull = 0; 1701 scan_l = scan_ul = scan_ull = 0;
1560 1702
1561 while (ldpaths[i]) { 1703 while (ldpaths[i]) {
1562 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1704 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
1563 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1705 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
1564 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1706 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
1565 scanelf_dir(ldpaths[i]); 1707 scanelf_dir(ldpaths[i]);
1566 ++i; 1708 ++i;
1567 } 1709 }
1568 1710
1587 } 1729 }
1588 1730
1589 free(path); 1731 free(path);
1590} 1732}
1591 1733
1592
1593/* usage / invocation handling functions */ /* Free Flags: c d j u w C G H I J K P Q U W Y Z */ 1734/* usage / invocation handling functions */ /* Free Flags: c d j u w C G H J K P Q U W */
1594#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DO:BhV" 1735#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZBhV"
1595#define a_argument required_argument 1736#define a_argument required_argument
1596static struct option const long_opts[] = { 1737static struct option const long_opts[] = {
1597 {"path", no_argument, NULL, 'p'}, 1738 {"path", no_argument, NULL, 'p'},
1598 {"ldpath", no_argument, NULL, 'l'}, 1739 {"ldpath", no_argument, NULL, 'l'},
1599 {"recursive", no_argument, NULL, 'R'}, 1740 {"recursive", no_argument, NULL, 'R'},
1617 {"gmatch", no_argument, NULL, 'g'}, 1758 {"gmatch", no_argument, NULL, 'g'},
1618 {"textrels", no_argument, NULL, 'T'}, 1759 {"textrels", no_argument, NULL, 'T'},
1619 {"etype", a_argument, NULL, 'E'}, 1760 {"etype", a_argument, NULL, 'E'},
1620 {"bits", a_argument, NULL, 'M'}, 1761 {"bits", a_argument, NULL, 'M'},
1621 {"endian", no_argument, NULL, 'D'}, 1762 {"endian", no_argument, NULL, 'D'},
1763 {"osabi", no_argument, NULL, 'I'},
1764 {"eabi", no_argument, NULL, 'Y'},
1622 {"perms", a_argument, NULL, 'O'}, 1765 {"perms", a_argument, NULL, 'O'},
1766 {"size", no_argument, NULL, 'Z'},
1623 {"all", no_argument, NULL, 'a'}, 1767 {"all", no_argument, NULL, 'a'},
1624 {"quiet", no_argument, NULL, 'q'}, 1768 {"quiet", no_argument, NULL, 'q'},
1625 {"verbose", no_argument, NULL, 'v'}, 1769 {"verbose", no_argument, NULL, 'v'},
1626 {"format", a_argument, NULL, 'F'}, 1770 {"format", a_argument, NULL, 'F'},
1627 {"from", a_argument, NULL, 'f'}, 1771 {"from", a_argument, NULL, 'f'},
1656 "Use strncmp to match libraries. (use with -N)", 1800 "Use strncmp to match libraries. (use with -N)",
1657 "Locate cause of TEXTREL", 1801 "Locate cause of TEXTREL",
1658 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1802 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1659 "Print only ELF files matching numeric bits", 1803 "Print only ELF files matching numeric bits",
1660 "Print Endianness", 1804 "Print Endianness",
1805 "Print OSABI",
1806 "Print EABI (EM_ARM Only)",
1661 "Print only ELF files matching octal permissions", 1807 "Print only ELF files matching octal permissions",
1662 "Print all scanned info (-x -e -t -r -b)\n", 1808 "Print ELF file size",
1809 "Print all useful/simple info\n",
1663 "Only output 'bad' things", 1810 "Only output 'bad' things",
1664 "Be verbose (can be specified more than once)", 1811 "Be verbose (can be specified more than once)",
1665 "Use specified format for output", 1812 "Use specified format for output",
1666 "Read input stream from a filename", 1813 "Read input stream from a filename",
1667 "Write output stream to a filename", 1814 "Write output stream to a filename",
1731 if (strcmp(optarg, "ELFCLASS64") == 0) 1878 if (strcmp(optarg, "ELFCLASS64") == 0)
1732 match_bits = 64; 1879 match_bits = 64;
1733 } 1880 }
1734 break; 1881 break;
1735 case 'O': 1882 case 'O':
1736 if (sscanf(optarg, "%o", &match_perms) == (-1)) 1883 if (sscanf(optarg, "%o", &match_perms) == -1)
1737 match_bits = 0; 1884 match_bits = 0;
1738 break; 1885 break;
1739 case 'o': { 1886 case 'o': {
1740 if (freopen(optarg, "w", stdout) == NULL) 1887 if (freopen(optarg, "w", stdout) == NULL)
1741 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1888 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1746 find_section = optarg; 1893 find_section = optarg;
1747 break; 1894 break;
1748 case 's': { 1895 case 's': {
1749 if (find_sym) warn("You prob don't want to specify -s twice"); 1896 if (find_sym) warn("You prob don't want to specify -s twice");
1750 find_sym = optarg; 1897 find_sym = optarg;
1751 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1752 sprintf(versioned_symname, "%s@", find_sym);
1753 break; 1898 break;
1754 } 1899 }
1755 case 'N': { 1900 case 'N': {
1756 if (find_lib) warn("You prob don't want to specify -N twice"); 1901 if (find_lib) warn("You prob don't want to specify -N twice");
1757 find_lib = optarg; 1902 find_lib = optarg;
1765 } 1910 }
1766 case 'z': { 1911 case 'z': {
1767 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1912 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1768 size_t x; 1913 size_t x;
1769 1914
1770 for (x = 0 ; x < strlen(optarg); x++) { 1915 for (x = 0; x < strlen(optarg); x++) {
1771 switch(optarg[x]) { 1916 switch (optarg[x]) {
1772 case 'p': 1917 case 'p':
1773 case 'P': 1918 case 'P':
1774 do_pax_state(optarg[x], PAGEEXEC); 1919 do_pax_state(optarg[x], PAGEEXEC);
1775 break; 1920 break;
1776 case 's': 1921 case 's':
1804 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1949 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1805 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1950 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1806 setpax = flags; 1951 setpax = flags;
1807 break; 1952 break;
1808 } 1953 }
1954 case 'Z': show_size = 1; break;
1809 case 'g': g_match = 1; break; 1955 case 'g': g_match = 1; break;
1810 case 'L': use_ldcache = 1; break; 1956 case 'L': use_ldcache = 1; break;
1811 case 'y': scan_symlink = 0; break; 1957 case 'y': scan_symlink = 0; break;
1812 case 'A': scan_archives = 1; break; 1958 case 'A': scan_archives = 1; break;
1813 case 'B': show_banner = 0; break; 1959 case 'B': show_banner = 0; break;
1827 case 'T': show_textrels = 1; break; 1973 case 'T': show_textrels = 1; break;
1828 case 'q': be_quiet = 1; break; 1974 case 'q': be_quiet = 1; break;
1829 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1975 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1830 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break; 1976 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1831 case 'D': show_endian = 1; break; 1977 case 'D': show_endian = 1; break;
1978 case 'I': show_osabi = 1; break;
1979 case 'Y': show_eabi = 1; break;
1832 case ':': 1980 case ':':
1833 err("Option '%c' is missing parameter", optopt); 1981 err("Option '%c' is missing parameter", optopt);
1834 case '?': 1982 case '?':
1835 err("Unknown option '%c' or argument missing", optopt); 1983 err("Unknown option '%c' or argument missing", optopt);
1836 default: 1984 default:
1843 } 1991 }
1844 /* let the format option override all other options */ 1992 /* let the format option override all other options */
1845 if (out_format) { 1993 if (out_format) {
1846 show_pax = show_phdr = show_textrel = show_rpath = \ 1994 show_pax = show_phdr = show_textrel = show_rpath = \
1847 show_needed = show_interp = show_bind = show_soname = \ 1995 show_needed = show_interp = show_bind = show_soname = \
1848 show_textrels = show_perms = show_endian = 0; 1996 show_textrels = show_perms = show_endian = show_size = \
1997 show_osabi = show_eabi = 0;
1849 for (i = 0; out_format[i]; ++i) { 1998 for (i = 0; out_format[i]; ++i) {
1850 if (!IS_MODIFIER(out_format[i])) continue; 1999 if (!IS_MODIFIER(out_format[i])) continue;
1851 2000
1852 switch (out_format[++i]) { 2001 switch (out_format[++i]) {
1853 case '+': break; 2002 case '+': break;
1860 case 's': break; 2009 case 's': break;
1861 case 'N': break; 2010 case 'N': break;
1862 case 'o': break; 2011 case 'o': break;
1863 case 'a': break; 2012 case 'a': break;
1864 case 'M': break; 2013 case 'M': break;
2014 case 'Z': show_size = 1; break;
1865 case 'D': show_endian = 1; break; 2015 case 'D': show_endian = 1; break;
2016 case 'I': show_osabi = 1; break;
2017 case 'Y': show_eabi = 1; break;
1866 case 'O': show_perms = 1; break; 2018 case 'O': show_perms = 1; break;
1867 case 'x': show_pax = 1; break; 2019 case 'x': show_pax = 1; break;
1868 case 'e': show_phdr = 1; break; 2020 case 'e': show_phdr = 1; break;
1869 case 't': show_textrel = 1; break; 2021 case 't': show_textrel = 1; break;
1870 case 'r': show_rpath = 1; break; 2022 case 'r': show_rpath = 1; break;
1880 } 2032 }
1881 2033
1882 /* construct our default format */ 2034 /* construct our default format */
1883 } else { 2035 } else {
1884 size_t fmt_len = 30; 2036 size_t fmt_len = 30;
1885 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 2037 out_format = xmalloc(sizeof(char) * fmt_len);
2038 *out_format = '\0';
1886 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 2039 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1887 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 2040 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1888 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len); 2041 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
2042 if (show_size) xstrcat(&out_format, "%Z ", &fmt_len);
1889 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len); 2043 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
2044 if (show_osabi) xstrcat(&out_format, "%I ", &fmt_len);
2045 if (show_eabi) xstrcat(&out_format, "%Y ", &fmt_len);
1890 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 2046 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1891 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 2047 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1892 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 2048 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1893 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 2049 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1894 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 2050 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1919 search_path = argv[optind++]; 2075 search_path = argv[optind++];
1920 ret = scanelf_dir(search_path); 2076 ret = scanelf_dir(search_path);
1921 } 2077 }
1922 2078
1923 /* clean up */ 2079 /* clean up */
1924 free(versioned_symname);
1925 for (i = 0; ldpaths[i]; ++i) 2080 for (i = 0; ldpaths[i]; ++i)
1926 free(ldpaths[i]); 2081 free(ldpaths[i]);
1927 2082
1928 if (ldcache != 0) 2083 if (ldcache != 0)
1929 munmap(ldcache, ldcache_size); 2084 munmap(ldcache, ldcache_size);
1978 free(qa_textrels); 2133 free(qa_textrels);
1979 free(qa_execstack); 2134 free(qa_execstack);
1980 free(qa_wx_load); 2135 free(qa_wx_load);
1981} 2136}
1982#endif 2137#endif
1983
1984 2138
1985int main(int argc, char *argv[]) 2139int main(int argc, char *argv[])
1986{ 2140{
1987 int ret; 2141 int ret;
1988 if (argc < 2) 2142 if (argc < 2)
1997 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD"); 2151 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1998#endif 2152#endif
1999 return ret; 2153 return ret;
2000} 2154}
2001 2155
2002
2003
2004/* utility funcs */
2005static char *xstrdup(const char *s)
2006{
2007 char *ret = strdup(s);
2008 if (!ret) err("Could not strdup(): %s", strerror(errno));
2009 return ret;
2010}
2011static void *xmalloc(size_t size)
2012{
2013 void *ret = malloc(size);
2014 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
2015 return ret;
2016}
2017static void *xrealloc(void *ptr, size_t size)
2018{
2019 void *ret = realloc(ptr, size);
2020 if (!ret) err("Could not realloc() %li bytes", (unsigned long)size);
2021 return ret;
2022}
2023static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
2024{
2025 size_t new_len;
2026
2027 new_len = strlen(*dst) + strlen(src);
2028 if (*curr_len <= new_len) {
2029 *curr_len = new_len + (*curr_len / 2);
2030 *dst = realloc(*dst, *curr_len);
2031 if (!*dst)
2032 err("could not realloc() %li bytes", (unsigned long)*curr_len);
2033 }
2034
2035 if (n)
2036 strncat(*dst, src, n);
2037 else
2038 strcat(*dst, src);
2039}
2040static inline void xchrcat(char **dst, const char append, size_t *curr_len)
2041{
2042 static char my_app[2];
2043 my_app[0] = append;
2044 my_app[1] = '\0';
2045 xstrcat(dst, my_app, curr_len);
2046}
2047
2048/* Match filename against entries in matchlist, return TRUE 2156/* Match filename against entries in matchlist, return TRUE
2049 * if the file is listed */ 2157 * if the file is listed */
2050static int file_matches_list(const char *filename, char **matchlist) 2158static int file_matches_list(const char *filename, char **matchlist)
2051{ 2159{
2052 char **file; 2160 char **file;

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