1 |
solar |
1.1 |
/* |
2 |
solar |
1.63 |
* Copyright 2003-2005 Gentoo Foundation |
3 |
solar |
1.1 |
* Distributed under the terms of the GNU General Public License v2 |
4 |
solar |
1.86 |
* $Header: /var/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.85 2005/07/25 23:31:32 vapier Exp $ |
5 |
solar |
1.1 |
* |
6 |
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******************************************************************** |
7 |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of the |
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* License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
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* MA 02111-1307, USA. |
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*/ |
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#include <stdio.h> |
24 |
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#include <stdlib.h> |
25 |
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#include <sys/types.h> |
26 |
vapier |
1.60 |
#include <libgen.h> |
27 |
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#include <limits.h> |
28 |
solar |
1.28 |
#define __USE_GNU |
29 |
solar |
1.1 |
#include <string.h> |
30 |
vapier |
1.10 |
#include <errno.h> |
31 |
solar |
1.1 |
#include <unistd.h> |
32 |
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#include <sys/stat.h> |
33 |
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#include <dirent.h> |
34 |
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#include <getopt.h> |
35 |
solar |
1.20 |
#include <assert.h> |
36 |
solar |
1.1 |
#include "paxelf.h" |
37 |
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|
38 |
solar |
1.86 |
static const char *rcsid = "$Id: scanelf.c,v 1.85 2005/07/25 23:31:32 vapier Exp $"; |
39 |
vapier |
1.36 |
#define argv0 "scanelf" |
40 |
vapier |
1.10 |
|
41 |
vapier |
1.70 |
#define IS_MODIFIER(c) (c == '%' || c == '#') |
42 |
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43 |
vapier |
1.10 |
|
44 |
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|
45 |
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/* prototypes */ |
46 |
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static void scanelf_file(const char *filename); |
47 |
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static void scanelf_dir(const char *path); |
48 |
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static void scanelf_ldpath(); |
49 |
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static void scanelf_envpath(); |
50 |
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static void usage(int status); |
51 |
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static void parseargs(int argc, char *argv[]); |
52 |
vapier |
1.60 |
static char *xstrdup(const char *s); |
53 |
vapier |
1.41 |
static void *xmalloc(size_t size); |
54 |
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static void xstrcat(char **dst, const char *src, size_t *curr_len); |
55 |
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static inline void xchrcat(char **dst, const char append, size_t *curr_len); |
56 |
vapier |
1.10 |
|
57 |
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/* variables to control behavior */ |
58 |
vapier |
1.48 |
static char *ldpaths[256]; |
59 |
vapier |
1.10 |
static char scan_ldpath = 0; |
60 |
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static char scan_envpath = 0; |
61 |
vapier |
1.37 |
static char scan_symlink = 1; |
62 |
vapier |
1.10 |
static char dir_recurse = 0; |
63 |
vapier |
1.14 |
static char dir_crossmount = 1; |
64 |
vapier |
1.10 |
static char show_pax = 0; |
65 |
solar |
1.73 |
static char show_phdr = 0; |
66 |
vapier |
1.10 |
static char show_textrel = 0; |
67 |
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static char show_rpath = 0; |
68 |
vapier |
1.32 |
static char show_needed = 0; |
69 |
vapier |
1.38 |
static char show_interp = 0; |
70 |
vapier |
1.49 |
static char show_bind = 0; |
71 |
vapier |
1.84 |
static char show_soname = 0; |
72 |
vapier |
1.76 |
static char show_textrels = 0; |
73 |
solar |
1.16 |
static char show_banner = 1; |
74 |
vapier |
1.10 |
static char be_quiet = 0; |
75 |
vapier |
1.14 |
static char be_verbose = 0; |
76 |
vapier |
1.70 |
static char be_wewy_wewy_quiet = 0; |
77 |
vapier |
1.39 |
static char *find_sym = NULL, *versioned_symname = NULL; |
78 |
vapier |
1.72 |
static char *find_lib = NULL; |
79 |
vapier |
1.39 |
static char *out_format = NULL; |
80 |
vapier |
1.66 |
static char *search_path = NULL; |
81 |
solar |
1.86 |
static char gmatch = 0; |
82 |
solar |
1.1 |
|
83 |
vapier |
1.70 |
|
84 |
vapier |
1.39 |
/* sub-funcs for scanelf_file() */ |
85 |
vapier |
1.77 |
static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) |
86 |
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{ |
87 |
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/* find the best SHT_DYNSYM and SHT_STRTAB sections */ |
88 |
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#define GET_SYMTABS(B) \ |
89 |
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if (elf->elf_class == ELFCLASS ## B) { \ |
90 |
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Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \ |
91 |
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/* debug sections */ \ |
92 |
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symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \ |
93 |
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strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \ |
94 |
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/* runtime sections */ \ |
95 |
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dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \ |
96 |
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dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \ |
97 |
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if (symtab && dynsym) { \ |
98 |
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*sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ |
99 |
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} else { \ |
100 |
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*sym = (void*)(symtab ? symtab : dynsym); \ |
101 |
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} \ |
102 |
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if (strtab && dynstr) { \ |
103 |
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*tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ |
104 |
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} else { \ |
105 |
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*tab = (void*)(strtab ? strtab : dynstr); \ |
106 |
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} \ |
107 |
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} |
108 |
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GET_SYMTABS(32) |
109 |
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GET_SYMTABS(64) |
110 |
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} |
111 |
vapier |
1.41 |
static char *scanelf_file_pax(elfobj *elf, char *found_pax) |
112 |
solar |
1.6 |
{ |
113 |
vapier |
1.41 |
static char *paxflags; |
114 |
solar |
1.61 |
static char ret[7]; |
115 |
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unsigned long i, shown; |
116 |
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|
117 |
vapier |
1.41 |
if (!show_pax) return NULL; |
118 |
vapier |
1.10 |
|
119 |
solar |
1.61 |
shown = 0; |
120 |
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memset(&ret, 0, sizeof(ret)); |
121 |
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122 |
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if (elf->phdr) { |
123 |
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#define SHOW_PAX(B) \ |
124 |
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if (elf->elf_class == ELFCLASS ## B) { \ |
125 |
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Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
126 |
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Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
127 |
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for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
128 |
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if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \ |
129 |
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continue; \ |
130 |
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if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \ |
131 |
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continue; \ |
132 |
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memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \ |
133 |
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*found_pax = 1; \ |
134 |
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++shown; \ |
135 |
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break; \ |
136 |
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} \ |
137 |
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} |
138 |
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SHOW_PAX(32) |
139 |
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SHOW_PAX(64) |
140 |
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} |
141 |
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142 |
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/* fall back to EI_PAX if no PT_PAX was found */ |
143 |
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if (!*ret) { |
144 |
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paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); |
145 |
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if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) { |
146 |
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*found_pax = 1; |
147 |
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return paxflags; |
148 |
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} |
149 |
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strncpy(ret, paxflags, sizeof(ret)); |
150 |
vapier |
1.14 |
} |
151 |
vapier |
1.41 |
|
152 |
solar |
1.61 |
if (be_quiet && !shown) |
153 |
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return NULL; |
154 |
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return ret; |
155 |
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156 |
vapier |
1.39 |
} |
157 |
solar |
1.73 |
static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load) |
158 |
vapier |
1.39 |
{ |
159 |
vapier |
1.71 |
static char ret[12]; |
160 |
vapier |
1.41 |
char *found; |
161 |
vapier |
1.71 |
unsigned long i, off, shown, check_flags; |
162 |
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unsigned char multi_stack, multi_relro, multi_load; |
163 |
vapier |
1.41 |
|
164 |
solar |
1.73 |
if (!show_phdr) return NULL; |
165 |
vapier |
1.41 |
|
166 |
vapier |
1.71 |
memcpy(ret, "--- --- ---\0", 12); |
167 |
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|
168 |
vapier |
1.41 |
shown = 0; |
169 |
vapier |
1.71 |
multi_stack = multi_relro = multi_load = 0; |
170 |
vapier |
1.44 |
|
171 |
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if (elf->phdr) { |
172 |
solar |
1.73 |
#define SHOW_PHDR(B) \ |
173 |
vapier |
1.39 |
if (elf->elf_class == ELFCLASS ## B) { \ |
174 |
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Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
175 |
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Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
176 |
vapier |
1.71 |
uint32_t flags; \ |
177 |
vapier |
1.39 |
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
178 |
vapier |
1.41 |
if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ |
179 |
vapier |
1.71 |
if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ |
180 |
solar |
1.73 |
found = found_phdr; \ |
181 |
vapier |
1.41 |
off = 0; \ |
182 |
vapier |
1.71 |
check_flags = PF_X; \ |
183 |
vapier |
1.41 |
} else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \ |
184 |
vapier |
1.71 |
if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ |
185 |
vapier |
1.41 |
found = found_relro; \ |
186 |
solar |
1.53 |
off = 4; \ |
187 |
vapier |
1.71 |
check_flags = PF_X; \ |
188 |
|
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} else if (EGET(phdr[i].p_type) == PT_LOAD) { \ |
189 |
|
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if (multi_load++ > 2) warnf("%s: more than 2 PT_LOAD's !?", elf->filename); \ |
190 |
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found = found_load; \ |
191 |
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off = 8; \ |
192 |
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check_flags = PF_W|PF_X; \ |
193 |
vapier |
1.41 |
} else \ |
194 |
|
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continue; \ |
195 |
vapier |
1.71 |
flags = EGET(phdr[i].p_flags); \ |
196 |
|
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if (be_quiet && ((flags & check_flags) != check_flags)) \ |
197 |
vapier |
1.39 |
continue; \ |
198 |
vapier |
1.71 |
memcpy(ret+off, gnu_short_stack_flags(flags), 3); \ |
199 |
vapier |
1.41 |
*found = 1; \ |
200 |
|
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++shown; \ |
201 |
vapier |
1.39 |
} \ |
202 |
|
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} |
203 |
solar |
1.73 |
SHOW_PHDR(32) |
204 |
|
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SHOW_PHDR(64) |
205 |
vapier |
1.44 |
} |
206 |
|
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|
207 |
vapier |
1.41 |
if (be_quiet && !shown) |
208 |
|
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return NULL; |
209 |
|
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else |
210 |
|
|
return ret; |
211 |
vapier |
1.39 |
} |
212 |
vapier |
1.41 |
static char *scanelf_file_textrel(elfobj *elf, char *found_textrel) |
213 |
vapier |
1.39 |
{ |
214 |
solar |
1.68 |
static char ret[] = "TEXTREL"; |
215 |
vapier |
1.44 |
unsigned long i; |
216 |
vapier |
1.41 |
|
217 |
vapier |
1.79 |
if (!show_textrel && !show_textrels) return NULL; |
218 |
vapier |
1.41 |
|
219 |
vapier |
1.44 |
if (elf->phdr) { |
220 |
vapier |
1.39 |
#define SHOW_TEXTREL(B) \ |
221 |
|
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if (elf->elf_class == ELFCLASS ## B) { \ |
222 |
|
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Elf ## B ## _Dyn *dyn; \ |
223 |
|
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Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
224 |
|
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Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
225 |
vapier |
1.44 |
Elf ## B ## _Off offset; \ |
226 |
vapier |
1.39 |
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
227 |
vapier |
1.59 |
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
228 |
vapier |
1.44 |
offset = EGET(phdr[i].p_offset); \ |
229 |
|
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if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
230 |
|
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dyn = DYN ## B (elf->data + offset); \ |
231 |
vapier |
1.39 |
while (EGET(dyn->d_tag) != DT_NULL) { \ |
232 |
|
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if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ |
233 |
|
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*found_textrel = 1; \ |
234 |
|
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/*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ |
235 |
vapier |
1.70 |
return (be_wewy_wewy_quiet ? NULL : ret); \ |
236 |
vapier |
1.39 |
} \ |
237 |
|
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++dyn; \ |
238 |
vapier |
1.26 |
} \ |
239 |
vapier |
1.39 |
} } |
240 |
|
|
SHOW_TEXTREL(32) |
241 |
|
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SHOW_TEXTREL(64) |
242 |
vapier |
1.44 |
} |
243 |
|
|
|
244 |
vapier |
1.70 |
if (be_quiet || be_wewy_wewy_quiet) |
245 |
vapier |
1.41 |
return NULL; |
246 |
|
|
else |
247 |
solar |
1.68 |
return (char *)" - "; |
248 |
vapier |
1.39 |
} |
249 |
vapier |
1.79 |
static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) |
250 |
vapier |
1.76 |
{ |
251 |
vapier |
1.82 |
unsigned long s, r, rmax; |
252 |
|
|
void *symtab_void, *strtab_void, *text_void; |
253 |
vapier |
1.76 |
|
254 |
|
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if (!show_textrels) return NULL; |
255 |
|
|
|
256 |
vapier |
1.79 |
/* don't search for TEXTREL's if the ELF doesn't have any */ |
257 |
|
|
if (!*found_textrel) scanelf_file_textrel(elf, found_textrel); |
258 |
|
|
if (!*found_textrel) return NULL; |
259 |
|
|
|
260 |
vapier |
1.77 |
scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); |
261 |
vapier |
1.82 |
text_void = elf_findsecbyname(elf, ".text"); |
262 |
vapier |
1.76 |
|
263 |
vapier |
1.82 |
if (symtab_void && strtab_void && text_void && elf->shdr) { |
264 |
vapier |
1.76 |
#define SHOW_TEXTRELS(B) \ |
265 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
266 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
267 |
|
|
Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ |
268 |
|
|
Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ |
269 |
|
|
Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ |
270 |
vapier |
1.82 |
Elf ## B ## _Shdr *text = SHDR ## B (text_void); \ |
271 |
|
|
Elf ## B ## _Addr vaddr = EGET(text->sh_addr); \ |
272 |
|
|
uint ## B ## _t memsz = EGET(text->sh_size); \ |
273 |
vapier |
1.76 |
Elf ## B ## _Rel *rel; \ |
274 |
|
|
Elf ## B ## _Rela *rela; \ |
275 |
|
|
/* search the section headers for relocations */ \ |
276 |
|
|
for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ |
277 |
|
|
uint32_t sh_type = EGET(shdr[s].sh_type); \ |
278 |
|
|
if (sh_type == SHT_REL) { \ |
279 |
|
|
rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ |
280 |
|
|
rela = NULL; \ |
281 |
|
|
rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ |
282 |
|
|
} else if (sh_type == SHT_RELA) { \ |
283 |
|
|
rel = NULL; \ |
284 |
|
|
rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ |
285 |
|
|
rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ |
286 |
|
|
} else \ |
287 |
|
|
continue; \ |
288 |
vapier |
1.82 |
/* now see if any of the relocs are in the .text */ \ |
289 |
|
|
for (r = 0; r < rmax; ++r) { \ |
290 |
|
|
unsigned long sym_max; \ |
291 |
|
|
Elf ## B ## _Addr offset_tmp; \ |
292 |
|
|
Elf ## B ## _Sym *func; \ |
293 |
|
|
Elf ## B ## _Sym *sym; \ |
294 |
|
|
Elf ## B ## _Addr r_offset; \ |
295 |
|
|
uint ## B ## _t r_info; \ |
296 |
|
|
if (sh_type == SHT_REL) { \ |
297 |
|
|
r_offset = EGET(rel[r].r_offset); \ |
298 |
|
|
r_info = EGET(rel[r].r_info); \ |
299 |
|
|
} else { \ |
300 |
|
|
r_offset = EGET(rela[r].r_offset); \ |
301 |
|
|
r_info = EGET(rela[r].r_info); \ |
302 |
|
|
} \ |
303 |
|
|
/* make sure this relocation is inside of the .text */ \ |
304 |
|
|
if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ |
305 |
|
|
if (be_verbose <= 2) continue; \ |
306 |
|
|
} else \ |
307 |
vapier |
1.78 |
*found_textrels = 1; \ |
308 |
vapier |
1.82 |
/* locate this relocation symbol name */ \ |
309 |
|
|
sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ |
310 |
|
|
sym_max = ELF ## B ## _R_SYM(r_info); \ |
311 |
|
|
if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ |
312 |
|
|
sym += sym_max; \ |
313 |
|
|
else \ |
314 |
|
|
sym = NULL; \ |
315 |
|
|
sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ |
316 |
|
|
/* show the raw details about this reloc */ \ |
317 |
|
|
printf("\tTEXTREL %s: ", elf->base_filename); \ |
318 |
|
|
if (sym && sym->st_name) \ |
319 |
|
|
printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \ |
320 |
|
|
else \ |
321 |
|
|
printf("(NULL: fake?)"); \ |
322 |
|
|
printf(" [0x%lX]", (unsigned long)r_offset); \ |
323 |
|
|
/* now try to find the closest symbol that this rel is probably in */ \ |
324 |
|
|
sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ |
325 |
|
|
func = NULL; \ |
326 |
|
|
offset_tmp = 0; \ |
327 |
|
|
while (sym_max--) { \ |
328 |
|
|
if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \ |
329 |
|
|
func = sym; \ |
330 |
|
|
offset_tmp = EGET(sym->st_value); \ |
331 |
vapier |
1.76 |
} \ |
332 |
vapier |
1.82 |
++sym; \ |
333 |
vapier |
1.76 |
} \ |
334 |
vapier |
1.82 |
printf(" in "); \ |
335 |
|
|
if (func && func->st_name) \ |
336 |
|
|
printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \ |
337 |
|
|
else \ |
338 |
|
|
printf("(NULL: fake?)"); \ |
339 |
|
|
printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ |
340 |
vapier |
1.76 |
} \ |
341 |
|
|
} } |
342 |
|
|
SHOW_TEXTRELS(32) |
343 |
|
|
SHOW_TEXTRELS(64) |
344 |
|
|
} |
345 |
vapier |
1.82 |
if (!*found_textrels) |
346 |
|
|
warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename); |
347 |
vapier |
1.76 |
|
348 |
|
|
return NULL; |
349 |
|
|
} |
350 |
solar |
1.83 |
|
351 |
|
|
static void rpath_security_checks(elfobj *, char *); |
352 |
|
|
static void rpath_security_checks(elfobj *elf, char *item) { |
353 |
|
|
struct stat st; |
354 |
vapier |
1.84 |
switch (*item) { |
355 |
solar |
1.83 |
case 0: |
356 |
|
|
warnf("Security problem NULL RPATH in %s", elf->filename); |
357 |
|
|
break; |
358 |
|
|
case '/': break; |
359 |
|
|
case '$': |
360 |
vapier |
1.84 |
if (fstat(elf->fd, &st) != -1) |
361 |
solar |
1.83 |
if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) |
362 |
|
|
warnf("Security problem with RPATH='%s' in %s with mode set of %o", |
363 |
|
|
item, elf->filename, st.st_mode & 07777); |
364 |
|
|
break; |
365 |
|
|
default: |
366 |
|
|
warnf("Maybe? sec problem with RPATH='%s' in %s", item, elf->filename); |
367 |
|
|
break; |
368 |
|
|
} |
369 |
|
|
} |
370 |
vapier |
1.41 |
static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) |
371 |
vapier |
1.39 |
{ |
372 |
vapier |
1.48 |
unsigned long i, s; |
373 |
|
|
char *rpath, *runpath, **r; |
374 |
vapier |
1.39 |
void *strtbl_void; |
375 |
vapier |
1.10 |
|
376 |
vapier |
1.39 |
if (!show_rpath) return; |
377 |
vapier |
1.10 |
|
378 |
vapier |
1.39 |
strtbl_void = elf_findsecbyname(elf, ".dynstr"); |
379 |
|
|
rpath = runpath = NULL; |
380 |
vapier |
1.10 |
|
381 |
vapier |
1.44 |
if (elf->phdr && strtbl_void) { |
382 |
vapier |
1.26 |
#define SHOW_RPATH(B) \ |
383 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
384 |
|
|
Elf ## B ## _Dyn *dyn; \ |
385 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
386 |
|
|
Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
387 |
|
|
Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ |
388 |
vapier |
1.44 |
Elf ## B ## _Off offset; \ |
389 |
vapier |
1.60 |
Elf ## B ## _Xword word; \ |
390 |
vapier |
1.48 |
/* Scan all the program headers */ \ |
391 |
vapier |
1.26 |
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
392 |
vapier |
1.48 |
/* Just scan dynamic headers */ \ |
393 |
vapier |
1.26 |
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
394 |
vapier |
1.44 |
offset = EGET(phdr[i].p_offset); \ |
395 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
396 |
vapier |
1.48 |
/* Just scan dynamic RPATH/RUNPATH headers */ \ |
397 |
vapier |
1.44 |
dyn = DYN ## B (elf->data + offset); \ |
398 |
vapier |
1.48 |
while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ |
399 |
|
|
if (word == DT_RPATH) { \ |
400 |
|
|
r = &rpath; \ |
401 |
|
|
} else if (word == DT_RUNPATH) { \ |
402 |
|
|
r = &runpath; \ |
403 |
|
|
} else { \ |
404 |
|
|
++dyn; \ |
405 |
|
|
continue; \ |
406 |
|
|
} \ |
407 |
|
|
/* Verify the memory is somewhat sane */ \ |
408 |
|
|
offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ |
409 |
vapier |
1.69 |
if (offset < (Elf ## B ## _Off)elf->len) { \ |
410 |
vapier |
1.48 |
if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ |
411 |
|
|
*r = (char*)(elf->data + offset); \ |
412 |
|
|
/* If quiet, don't output paths in ld.so.conf */ \ |
413 |
vapier |
1.69 |
if (be_quiet) { \ |
414 |
|
|
size_t len; \ |
415 |
|
|
char *start, *end; \ |
416 |
vapier |
1.75 |
/* note that we only 'chop' off leading known paths. */ \ |
417 |
|
|
/* since *r is read-only memory, we can only move the ptr forward. */ \ |
418 |
|
|
start = *r; \ |
419 |
|
|
/* scan each path in : delimited list */ \ |
420 |
|
|
while (start) { \ |
421 |
solar |
1.83 |
rpath_security_checks(elf, start); \ |
422 |
vapier |
1.69 |
end = strchr(start, ':'); \ |
423 |
vapier |
1.75 |
len = (end ? abs(end - start) : strlen(start)); \ |
424 |
|
|
for (s = 0; ldpaths[s]; ++s) { \ |
425 |
vapier |
1.69 |
if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ |
426 |
|
|
*r = (end ? end + 1 : NULL); \ |
427 |
|
|
break; \ |
428 |
|
|
} \ |
429 |
vapier |
1.48 |
} \ |
430 |
vapier |
1.75 |
if (!*r || !ldpaths[s] || !end) \ |
431 |
|
|
start = NULL; \ |
432 |
|
|
else \ |
433 |
|
|
start = start + len + 1; \ |
434 |
vapier |
1.69 |
} \ |
435 |
|
|
} \ |
436 |
vapier |
1.48 |
if (*r) *found_rpath = 1; \ |
437 |
vapier |
1.26 |
} \ |
438 |
|
|
++dyn; \ |
439 |
|
|
} \ |
440 |
|
|
} } |
441 |
|
|
SHOW_RPATH(32) |
442 |
|
|
SHOW_RPATH(64) |
443 |
vapier |
1.10 |
} |
444 |
vapier |
1.41 |
|
445 |
vapier |
1.70 |
if (be_wewy_wewy_quiet) return; |
446 |
|
|
|
447 |
vapier |
1.39 |
if (rpath && runpath) { |
448 |
vapier |
1.41 |
if (!strcmp(rpath, runpath)) { |
449 |
|
|
xstrcat(ret, runpath, ret_len); |
450 |
|
|
} else { |
451 |
vapier |
1.39 |
fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath); |
452 |
vapier |
1.41 |
xchrcat(ret, '{', ret_len); |
453 |
|
|
xstrcat(ret, rpath, ret_len); |
454 |
|
|
xchrcat(ret, ',', ret_len); |
455 |
|
|
xstrcat(ret, runpath, ret_len); |
456 |
|
|
xchrcat(ret, '}', ret_len); |
457 |
vapier |
1.39 |
} |
458 |
|
|
} else if (rpath || runpath) |
459 |
vapier |
1.41 |
xstrcat(ret, (runpath ? runpath : rpath), ret_len); |
460 |
|
|
else if (!be_quiet) |
461 |
|
|
xstrcat(ret, " - ", ret_len); |
462 |
vapier |
1.39 |
} |
463 |
vapier |
1.84 |
static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len) |
464 |
vapier |
1.39 |
{ |
465 |
vapier |
1.44 |
unsigned long i; |
466 |
vapier |
1.39 |
char *needed; |
467 |
|
|
void *strtbl_void; |
468 |
|
|
|
469 |
vapier |
1.72 |
if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; |
470 |
vapier |
1.10 |
|
471 |
vapier |
1.39 |
strtbl_void = elf_findsecbyname(elf, ".dynstr"); |
472 |
vapier |
1.32 |
|
473 |
vapier |
1.44 |
if (elf->phdr && strtbl_void) { |
474 |
vapier |
1.32 |
#define SHOW_NEEDED(B) \ |
475 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
476 |
|
|
Elf ## B ## _Dyn *dyn; \ |
477 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
478 |
|
|
Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
479 |
|
|
Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ |
480 |
vapier |
1.44 |
Elf ## B ## _Off offset; \ |
481 |
vapier |
1.32 |
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
482 |
|
|
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
483 |
vapier |
1.44 |
offset = EGET(phdr[i].p_offset); \ |
484 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
485 |
|
|
dyn = DYN ## B (elf->data + offset); \ |
486 |
vapier |
1.32 |
while (EGET(dyn->d_tag) != DT_NULL) { \ |
487 |
|
|
if (EGET(dyn->d_tag) == DT_NEEDED) { \ |
488 |
vapier |
1.44 |
offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ |
489 |
vapier |
1.69 |
if (offset >= (Elf ## B ## _Off)elf->len) { \ |
490 |
vapier |
1.49 |
++dyn; \ |
491 |
|
|
continue; \ |
492 |
|
|
} \ |
493 |
vapier |
1.44 |
needed = (char*)(elf->data + offset); \ |
494 |
vapier |
1.72 |
if (op == 0) { \ |
495 |
|
|
if (!be_wewy_wewy_quiet) { \ |
496 |
|
|
if (*found_needed) xchrcat(ret, ',', ret_len); \ |
497 |
|
|
xstrcat(ret, needed, ret_len); \ |
498 |
|
|
} \ |
499 |
|
|
*found_needed = 1; \ |
500 |
|
|
} else { \ |
501 |
solar |
1.86 |
if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \ |
502 |
vapier |
1.81 |
*found_lib = 1; \ |
503 |
solar |
1.86 |
return (be_wewy_wewy_quiet ? NULL : needed); \ |
504 |
vapier |
1.81 |
} \ |
505 |
vapier |
1.72 |
} \ |
506 |
vapier |
1.32 |
} \ |
507 |
|
|
++dyn; \ |
508 |
|
|
} \ |
509 |
|
|
} } |
510 |
|
|
SHOW_NEEDED(32) |
511 |
|
|
SHOW_NEEDED(64) |
512 |
vapier |
1.85 |
if (op == 0 && !*found_needed && be_verbose) |
513 |
vapier |
1.84 |
warn("ELF lacks DT_NEEDED sections: %s", elf->filename); |
514 |
vapier |
1.32 |
} |
515 |
vapier |
1.72 |
|
516 |
|
|
return NULL; |
517 |
vapier |
1.39 |
} |
518 |
vapier |
1.41 |
static char *scanelf_file_interp(elfobj *elf, char *found_interp) |
519 |
vapier |
1.39 |
{ |
520 |
|
|
void *strtbl_void; |
521 |
|
|
|
522 |
vapier |
1.41 |
if (!show_interp) return NULL; |
523 |
vapier |
1.32 |
|
524 |
vapier |
1.39 |
strtbl_void = elf_findsecbyname(elf, ".interp"); |
525 |
vapier |
1.38 |
|
526 |
vapier |
1.39 |
if (strtbl_void) { |
527 |
vapier |
1.38 |
#define SHOW_INTERP(B) \ |
528 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
529 |
solar |
1.40 |
Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ |
530 |
|
|
*found_interp = 1; \ |
531 |
vapier |
1.70 |
return (be_wewy_wewy_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \ |
532 |
vapier |
1.38 |
} |
533 |
|
|
SHOW_INTERP(32) |
534 |
|
|
SHOW_INTERP(64) |
535 |
|
|
} |
536 |
vapier |
1.41 |
return NULL; |
537 |
vapier |
1.39 |
} |
538 |
vapier |
1.49 |
static char *scanelf_file_bind(elfobj *elf, char *found_bind) |
539 |
|
|
{ |
540 |
|
|
unsigned long i; |
541 |
|
|
struct stat s; |
542 |
|
|
|
543 |
|
|
if (!show_bind) return NULL; |
544 |
vapier |
1.51 |
if (!elf->phdr) return NULL; |
545 |
vapier |
1.49 |
|
546 |
|
|
#define SHOW_BIND(B) \ |
547 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
548 |
|
|
Elf ## B ## _Dyn *dyn; \ |
549 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
550 |
|
|
Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
551 |
|
|
Elf ## B ## _Off offset; \ |
552 |
|
|
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
553 |
|
|
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
554 |
|
|
offset = EGET(phdr[i].p_offset); \ |
555 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
556 |
|
|
dyn = DYN ## B (elf->data + offset); \ |
557 |
|
|
while (EGET(dyn->d_tag) != DT_NULL) { \ |
558 |
|
|
if (EGET(dyn->d_tag) == DT_BIND_NOW || \ |
559 |
|
|
(EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \ |
560 |
|
|
{ \ |
561 |
|
|
if (be_quiet) return NULL; \ |
562 |
|
|
*found_bind = 1; \ |
563 |
vapier |
1.70 |
return (char *)(be_wewy_wewy_quiet ? NULL : "NOW"); \ |
564 |
vapier |
1.49 |
} \ |
565 |
|
|
++dyn; \ |
566 |
|
|
} \ |
567 |
|
|
} \ |
568 |
|
|
} |
569 |
|
|
SHOW_BIND(32) |
570 |
|
|
SHOW_BIND(64) |
571 |
|
|
|
572 |
vapier |
1.70 |
if (be_wewy_wewy_quiet) return NULL; |
573 |
|
|
|
574 |
vapier |
1.56 |
if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) { |
575 |
vapier |
1.49 |
return NULL; |
576 |
|
|
} else { |
577 |
|
|
*found_bind = 1; |
578 |
solar |
1.68 |
return (char *) "LAZY"; |
579 |
vapier |
1.49 |
} |
580 |
|
|
} |
581 |
vapier |
1.84 |
static char *scanelf_file_soname(elfobj *elf, char *found_soname) |
582 |
|
|
{ |
583 |
|
|
unsigned long i; |
584 |
|
|
char *soname; |
585 |
|
|
void *strtbl_void; |
586 |
|
|
|
587 |
|
|
if (!show_soname) return NULL; |
588 |
|
|
|
589 |
|
|
strtbl_void = elf_findsecbyname(elf, ".dynstr"); |
590 |
|
|
|
591 |
|
|
if (elf->phdr && strtbl_void) { |
592 |
|
|
#define SHOW_SONAME(B) \ |
593 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
594 |
|
|
Elf ## B ## _Dyn *dyn; \ |
595 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
596 |
|
|
Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
597 |
|
|
Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ |
598 |
|
|
Elf ## B ## _Off offset; \ |
599 |
|
|
/* only look for soname in shared objects */ \ |
600 |
|
|
if (ehdr->e_type != ET_DYN) \ |
601 |
|
|
return NULL; \ |
602 |
|
|
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
603 |
|
|
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
604 |
|
|
offset = EGET(phdr[i].p_offset); \ |
605 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
606 |
|
|
dyn = DYN ## B (elf->data + offset); \ |
607 |
|
|
while (EGET(dyn->d_tag) != DT_NULL) { \ |
608 |
|
|
if (EGET(dyn->d_tag) == DT_SONAME) { \ |
609 |
|
|
offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ |
610 |
|
|
if (offset >= (Elf ## B ## _Off)elf->len) { \ |
611 |
|
|
++dyn; \ |
612 |
|
|
continue; \ |
613 |
|
|
} \ |
614 |
|
|
soname = (char*)(elf->data + offset); \ |
615 |
|
|
*found_soname = 1; \ |
616 |
|
|
return (be_wewy_wewy_quiet ? NULL : soname); \ |
617 |
|
|
} \ |
618 |
|
|
++dyn; \ |
619 |
|
|
} \ |
620 |
|
|
} } |
621 |
|
|
SHOW_SONAME(32) |
622 |
|
|
SHOW_SONAME(64) |
623 |
|
|
} |
624 |
|
|
|
625 |
|
|
return NULL; |
626 |
|
|
} |
627 |
vapier |
1.72 |
static char *scanelf_file_sym(elfobj *elf, char *found_sym) |
628 |
vapier |
1.39 |
{ |
629 |
vapier |
1.44 |
unsigned long i; |
630 |
vapier |
1.39 |
void *symtab_void, *strtab_void; |
631 |
vapier |
1.38 |
|
632 |
vapier |
1.41 |
if (!find_sym) return NULL; |
633 |
vapier |
1.32 |
|
634 |
vapier |
1.77 |
scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); |
635 |
vapier |
1.27 |
|
636 |
vapier |
1.39 |
if (symtab_void && strtab_void) { |
637 |
vapier |
1.27 |
#define FIND_SYM(B) \ |
638 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
639 |
|
|
Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ |
640 |
|
|
Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ |
641 |
|
|
Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ |
642 |
vapier |
1.44 |
unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ |
643 |
vapier |
1.27 |
char *symname; \ |
644 |
|
|
for (i = 0; i < cnt; ++i) { \ |
645 |
|
|
if (sym->st_name) { \ |
646 |
|
|
symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ |
647 |
solar |
1.28 |
if (*find_sym == '*') { \ |
648 |
vapier |
1.32 |
printf("%s(%s) %5lX %15s %s\n", \ |
649 |
vapier |
1.39 |
((*found_sym == 0) ? "\n\t" : "\t"), \ |
650 |
vapier |
1.76 |
elf->base_filename, \ |
651 |
vapier |
1.32 |
(long)sym->st_size, \ |
652 |
|
|
(char *)get_elfstttype(sym->st_info), \ |
653 |
|
|
symname); \ |
654 |
vapier |
1.39 |
*found_sym = 1; \ |
655 |
vapier |
1.32 |
} else if ((strcmp(find_sym, symname) == 0) || \ |
656 |
vapier |
1.39 |
(strcmp(symname, versioned_symname) == 0)) \ |
657 |
|
|
(*found_sym)++; \ |
658 |
vapier |
1.27 |
} \ |
659 |
|
|
++sym; \ |
660 |
|
|
} } |
661 |
|
|
FIND_SYM(32) |
662 |
|
|
FIND_SYM(64) |
663 |
vapier |
1.39 |
} |
664 |
vapier |
1.70 |
|
665 |
|
|
if (be_wewy_wewy_quiet) return NULL; |
666 |
|
|
|
667 |
vapier |
1.41 |
if (*find_sym != '*' && *found_sym) |
668 |
|
|
return find_sym; |
669 |
|
|
if (be_quiet) |
670 |
|
|
return NULL; |
671 |
|
|
else |
672 |
solar |
1.68 |
return (char *)" - "; |
673 |
vapier |
1.39 |
} |
674 |
|
|
/* scan an elf file and show all the fun stuff */ |
675 |
solar |
1.57 |
#define prints(str) write(fileno(stdout), str, strlen(str)) |
676 |
vapier |
1.39 |
static void scanelf_file(const char *filename) |
677 |
|
|
{ |
678 |
vapier |
1.44 |
unsigned long i; |
679 |
solar |
1.73 |
char found_pax, found_phdr, found_relro, found_load, found_textrel, |
680 |
vapier |
1.84 |
found_rpath, found_needed, found_interp, found_bind, found_soname, |
681 |
vapier |
1.76 |
found_sym, found_lib, found_file, found_textrels; |
682 |
vapier |
1.39 |
elfobj *elf; |
683 |
|
|
struct stat st; |
684 |
vapier |
1.41 |
static char *out_buffer = NULL; |
685 |
|
|
static size_t out_len; |
686 |
vapier |
1.39 |
|
687 |
|
|
/* make sure 'filename' exists */ |
688 |
|
|
if (lstat(filename, &st) == -1) { |
689 |
|
|
if (be_verbose > 2) printf("%s: does not exist\n", filename); |
690 |
|
|
return; |
691 |
|
|
} |
692 |
|
|
/* always handle regular files and handle symlinked files if no -y */ |
693 |
vapier |
1.55 |
if (S_ISLNK(st.st_mode)) { |
694 |
|
|
if (!scan_symlink) return; |
695 |
|
|
stat(filename, &st); |
696 |
|
|
} |
697 |
|
|
if (!S_ISREG(st.st_mode)) { |
698 |
vapier |
1.39 |
if (be_verbose > 2) printf("%s: skipping non-file\n", filename); |
699 |
|
|
return; |
700 |
|
|
} |
701 |
|
|
|
702 |
vapier |
1.76 |
found_pax = found_phdr = found_relro = found_load = found_textrel = \ |
703 |
vapier |
1.84 |
found_rpath = found_needed = found_interp = found_bind = found_soname = \ |
704 |
vapier |
1.76 |
found_sym = found_lib = found_file = found_textrels = 0; |
705 |
vapier |
1.39 |
|
706 |
|
|
/* verify this is real ELF */ |
707 |
|
|
if ((elf = readelf(filename)) == NULL) { |
708 |
|
|
if (be_verbose > 2) printf("%s: not an ELF\n", filename); |
709 |
|
|
return; |
710 |
|
|
} |
711 |
|
|
|
712 |
|
|
if (be_verbose > 1) |
713 |
vapier |
1.41 |
printf("%s: scanning file {%s,%s}\n", filename, |
714 |
vapier |
1.69 |
get_elfeitype(EI_CLASS, elf->elf_class), |
715 |
|
|
get_elfeitype(EI_DATA, elf->data[EI_DATA])); |
716 |
vapier |
1.39 |
else if (be_verbose) |
717 |
|
|
printf("%s: scanning file\n", filename); |
718 |
|
|
|
719 |
vapier |
1.41 |
/* init output buffer */ |
720 |
|
|
if (!out_buffer) { |
721 |
|
|
out_len = sizeof(char) * 80; |
722 |
|
|
out_buffer = (char*)xmalloc(out_len); |
723 |
|
|
} |
724 |
|
|
*out_buffer = '\0'; |
725 |
|
|
|
726 |
vapier |
1.39 |
/* show the header */ |
727 |
|
|
if (!be_quiet && show_banner) { |
728 |
vapier |
1.49 |
for (i = 0; out_format[i]; ++i) { |
729 |
vapier |
1.70 |
if (!IS_MODIFIER(out_format[i])) continue; |
730 |
vapier |
1.41 |
|
731 |
|
|
switch (out_format[++i]) { |
732 |
|
|
case '%': break; |
733 |
vapier |
1.70 |
case '#': break; |
734 |
vapier |
1.66 |
case 'F': |
735 |
|
|
case 'p': |
736 |
|
|
case 'f': prints("FILE "); found_file = 1; break; |
737 |
vapier |
1.41 |
case 'o': prints(" TYPE "); break; |
738 |
|
|
case 'x': prints(" PAX "); break; |
739 |
vapier |
1.71 |
case 'e': prints("STK/REL/PTL "); break; |
740 |
vapier |
1.41 |
case 't': prints("TEXTREL "); break; |
741 |
|
|
case 'r': prints("RPATH "); break; |
742 |
|
|
case 'n': prints("NEEDED "); break; |
743 |
|
|
case 'i': prints("INTERP "); break; |
744 |
vapier |
1.49 |
case 'b': prints("BIND "); break; |
745 |
vapier |
1.84 |
case 'S': prints("SONAME "); break; |
746 |
vapier |
1.41 |
case 's': prints("SYM "); break; |
747 |
vapier |
1.72 |
case 'N': prints("LIB "); break; |
748 |
vapier |
1.76 |
case 'T': prints("TEXTRELS "); break; |
749 |
|
|
default: warnf("'%c' has no title ?", out_format[i]); |
750 |
vapier |
1.39 |
} |
751 |
vapier |
1.27 |
} |
752 |
vapier |
1.49 |
if (!found_file) prints("FILE "); |
753 |
vapier |
1.41 |
prints("\n"); |
754 |
vapier |
1.49 |
found_file = 0; |
755 |
vapier |
1.39 |
show_banner = 0; |
756 |
|
|
} |
757 |
|
|
|
758 |
|
|
/* dump all the good stuff */ |
759 |
vapier |
1.49 |
for (i = 0; out_format[i]; ++i) { |
760 |
vapier |
1.41 |
const char *out; |
761 |
vapier |
1.66 |
const char *tmp; |
762 |
vapier |
1.41 |
|
763 |
|
|
/* make sure we trim leading spaces in quiet mode */ |
764 |
|
|
if (be_quiet && *out_buffer == ' ' && !out_buffer[1]) |
765 |
|
|
*out_buffer = '\0'; |
766 |
vapier |
1.39 |
|
767 |
vapier |
1.70 |
if (!IS_MODIFIER(out_format[i])) { |
768 |
vapier |
1.41 |
xchrcat(&out_buffer, out_format[i], &out_len); |
769 |
|
|
continue; |
770 |
|
|
} |
771 |
vapier |
1.39 |
|
772 |
vapier |
1.41 |
out = NULL; |
773 |
vapier |
1.70 |
be_wewy_wewy_quiet = (out_format[i] == '#'); |
774 |
vapier |
1.41 |
switch (out_format[++i]) { |
775 |
vapier |
1.70 |
case '%': |
776 |
|
|
case '#': |
777 |
|
|
xchrcat(&out_buffer, out_format[i], &out_len); break; |
778 |
|
|
case 'F': |
779 |
vapier |
1.76 |
found_file = 1; |
780 |
vapier |
1.70 |
if (be_wewy_wewy_quiet) break; |
781 |
|
|
xstrcat(&out_buffer, filename, &out_len); |
782 |
|
|
break; |
783 |
vapier |
1.66 |
case 'p': |
784 |
vapier |
1.76 |
found_file = 1; |
785 |
vapier |
1.70 |
if (be_wewy_wewy_quiet) break; |
786 |
vapier |
1.66 |
tmp = filename; |
787 |
|
|
if (search_path) { |
788 |
|
|
ssize_t len_search = strlen(search_path); |
789 |
|
|
ssize_t len_file = strlen(filename); |
790 |
|
|
if (!strncmp(filename, search_path, len_search) && \ |
791 |
|
|
len_file > len_search) |
792 |
|
|
tmp += len_search; |
793 |
|
|
if (*tmp == '/' && search_path[len_search-1] == '/') tmp++; |
794 |
|
|
} |
795 |
|
|
xstrcat(&out_buffer, tmp, &out_len); |
796 |
|
|
break; |
797 |
|
|
case 'f': |
798 |
vapier |
1.76 |
found_file = 1; |
799 |
vapier |
1.70 |
if (be_wewy_wewy_quiet) break; |
800 |
vapier |
1.66 |
tmp = strrchr(filename, '/'); |
801 |
|
|
tmp = (tmp == NULL ? filename : tmp+1); |
802 |
|
|
xstrcat(&out_buffer, tmp, &out_len); |
803 |
|
|
break; |
804 |
vapier |
1.41 |
case 'o': out = get_elfetype(elf); break; |
805 |
|
|
case 'x': out = scanelf_file_pax(elf, &found_pax); break; |
806 |
solar |
1.73 |
case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break; |
807 |
vapier |
1.41 |
case 't': out = scanelf_file_textrel(elf, &found_textrel); break; |
808 |
vapier |
1.79 |
case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break; |
809 |
vapier |
1.41 |
case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; |
810 |
vapier |
1.72 |
case 'n': |
811 |
|
|
case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; |
812 |
vapier |
1.41 |
case 'i': out = scanelf_file_interp(elf, &found_interp); break; |
813 |
vapier |
1.49 |
case 'b': out = scanelf_file_bind(elf, &found_bind); break; |
814 |
vapier |
1.84 |
case 'S': out = scanelf_file_soname(elf, &found_soname); break; |
815 |
vapier |
1.72 |
case 's': out = scanelf_file_sym(elf, &found_sym); break; |
816 |
vapier |
1.76 |
default: warnf("'%c' has no scan code?", out_format[i]); |
817 |
vapier |
1.29 |
} |
818 |
vapier |
1.41 |
if (out) xstrcat(&out_buffer, out, &out_len); |
819 |
vapier |
1.39 |
} |
820 |
|
|
|
821 |
vapier |
1.54 |
#define FOUND_SOMETHING() \ |
822 |
solar |
1.73 |
(found_pax || found_phdr || found_relro || found_load || found_textrel || \ |
823 |
vapier |
1.76 |
found_rpath || found_needed || found_interp || found_bind || \ |
824 |
vapier |
1.84 |
found_soname || found_sym || found_lib || found_textrels) |
825 |
vapier |
1.54 |
|
826 |
|
|
if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { |
827 |
|
|
xchrcat(&out_buffer, ' ', &out_len); |
828 |
|
|
xstrcat(&out_buffer, filename, &out_len); |
829 |
vapier |
1.27 |
} |
830 |
vapier |
1.79 |
if (!be_quiet || (be_quiet && FOUND_SOMETHING())) { |
831 |
vapier |
1.41 |
puts(out_buffer); |
832 |
vapier |
1.79 |
fflush(stdout); |
833 |
|
|
} |
834 |
vapier |
1.10 |
|
835 |
|
|
unreadelf(elf); |
836 |
solar |
1.6 |
} |
837 |
|
|
|
838 |
solar |
1.1 |
/* scan a directory for ET_EXEC files and print when we find one */ |
839 |
vapier |
1.10 |
static void scanelf_dir(const char *path) |
840 |
solar |
1.1 |
{ |
841 |
vapier |
1.10 |
register DIR *dir; |
842 |
|
|
register struct dirent *dentry; |
843 |
vapier |
1.14 |
struct stat st_top, st; |
844 |
solar |
1.21 |
char buf[_POSIX_PATH_MAX]; |
845 |
vapier |
1.32 |
size_t pathlen = 0, len = 0; |
846 |
vapier |
1.10 |
|
847 |
|
|
/* make sure path exists */ |
848 |
vapier |
1.39 |
if (lstat(path, &st_top) == -1) { |
849 |
|
|
if (be_verbose > 2) printf("%s: does not exist\n", path); |
850 |
vapier |
1.10 |
return; |
851 |
vapier |
1.39 |
} |
852 |
solar |
1.11 |
|
853 |
vapier |
1.10 |
/* ok, if it isn't a directory, assume we can open it */ |
854 |
vapier |
1.14 |
if (!S_ISDIR(st_top.st_mode)) { |
855 |
vapier |
1.10 |
scanelf_file(path); |
856 |
|
|
return; |
857 |
|
|
} |
858 |
|
|
|
859 |
|
|
/* now scan the dir looking for fun stuff */ |
860 |
|
|
if ((dir = opendir(path)) == NULL) { |
861 |
|
|
warnf("could not opendir %s: %s", path, strerror(errno)); |
862 |
|
|
return; |
863 |
|
|
} |
864 |
vapier |
1.15 |
if (be_verbose) printf("%s: scanning dir\n", path); |
865 |
solar |
1.11 |
|
866 |
vapier |
1.32 |
pathlen = strlen(path); |
867 |
vapier |
1.10 |
while ((dentry = readdir(dir))) { |
868 |
|
|
if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) |
869 |
|
|
continue; |
870 |
vapier |
1.32 |
len = (pathlen + 1 + strlen(dentry->d_name) + 1); |
871 |
|
|
if (len >= sizeof(buf)) { |
872 |
vapier |
1.76 |
warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, |
873 |
|
|
(unsigned long)len, (unsigned long)sizeof(buf)); |
874 |
vapier |
1.32 |
continue; |
875 |
|
|
} |
876 |
solar |
1.31 |
sprintf(buf, "%s/%s", path, dentry->d_name); |
877 |
solar |
1.20 |
if (lstat(buf, &st) != -1) { |
878 |
vapier |
1.10 |
if (S_ISREG(st.st_mode)) |
879 |
solar |
1.20 |
scanelf_file(buf); |
880 |
vapier |
1.10 |
else if (dir_recurse && S_ISDIR(st.st_mode)) { |
881 |
vapier |
1.14 |
if (dir_crossmount || (st_top.st_dev == st.st_dev)) |
882 |
solar |
1.20 |
scanelf_dir(buf); |
883 |
vapier |
1.10 |
} |
884 |
|
|
} |
885 |
|
|
} |
886 |
|
|
closedir(dir); |
887 |
solar |
1.1 |
} |
888 |
|
|
|
889 |
vapier |
1.47 |
static int scanelf_from_file(char *filename) |
890 |
|
|
{ |
891 |
solar |
1.45 |
FILE *fp = NULL; |
892 |
|
|
char *p; |
893 |
|
|
char path[_POSIX_PATH_MAX]; |
894 |
|
|
|
895 |
|
|
if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) |
896 |
|
|
fp = stdin; |
897 |
|
|
else if ((fp = fopen(filename, "r")) == NULL) |
898 |
|
|
return 1; |
899 |
|
|
|
900 |
|
|
while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { |
901 |
|
|
if ((p = strchr(path, '\n')) != NULL) |
902 |
|
|
*p = 0; |
903 |
vapier |
1.66 |
search_path = path; |
904 |
solar |
1.45 |
scanelf_dir(path); |
905 |
|
|
} |
906 |
|
|
if (fp != stdin) |
907 |
|
|
fclose(fp); |
908 |
|
|
return 0; |
909 |
|
|
} |
910 |
|
|
|
911 |
vapier |
1.48 |
static void load_ld_so_conf() |
912 |
|
|
{ |
913 |
|
|
FILE *fp = NULL; |
914 |
|
|
char *p; |
915 |
|
|
char path[_POSIX_PATH_MAX]; |
916 |
|
|
int i = 0; |
917 |
|
|
|
918 |
|
|
if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) |
919 |
|
|
return; |
920 |
|
|
|
921 |
|
|
while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { |
922 |
|
|
if (*path != '/') |
923 |
|
|
continue; |
924 |
|
|
|
925 |
|
|
if ((p = strrchr(path, '\r')) != NULL) |
926 |
|
|
*p = 0; |
927 |
|
|
if ((p = strchr(path, '\n')) != NULL) |
928 |
|
|
*p = 0; |
929 |
|
|
|
930 |
|
|
ldpaths[i++] = xstrdup(path); |
931 |
|
|
|
932 |
|
|
if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) |
933 |
|
|
break; |
934 |
|
|
} |
935 |
|
|
ldpaths[i] = NULL; |
936 |
|
|
|
937 |
|
|
fclose(fp); |
938 |
|
|
} |
939 |
|
|
|
940 |
vapier |
1.10 |
/* scan /etc/ld.so.conf for paths */ |
941 |
|
|
static void scanelf_ldpath() |
942 |
|
|
{ |
943 |
vapier |
1.17 |
char scan_l, scan_ul, scan_ull; |
944 |
vapier |
1.48 |
int i = 0; |
945 |
vapier |
1.10 |
|
946 |
vapier |
1.48 |
if (!ldpaths[0]) |
947 |
|
|
err("Unable to load any paths from ld.so.conf"); |
948 |
vapier |
1.10 |
|
949 |
vapier |
1.17 |
scan_l = scan_ul = scan_ull = 0; |
950 |
|
|
|
951 |
vapier |
1.48 |
while (ldpaths[i]) { |
952 |
|
|
if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; |
953 |
|
|
if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; |
954 |
|
|
if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; |
955 |
|
|
scanelf_dir(ldpaths[i]); |
956 |
|
|
++i; |
957 |
|
|
} |
958 |
vapier |
1.10 |
|
959 |
vapier |
1.17 |
if (!scan_l) scanelf_dir("/lib"); |
960 |
|
|
if (!scan_ul) scanelf_dir("/usr/lib"); |
961 |
|
|
if (!scan_ull) scanelf_dir("/usr/local/lib"); |
962 |
vapier |
1.10 |
} |
963 |
solar |
1.1 |
|
964 |
vapier |
1.10 |
/* scan env PATH for paths */ |
965 |
|
|
static void scanelf_envpath() |
966 |
solar |
1.1 |
{ |
967 |
solar |
1.34 |
char *path, *p; |
968 |
vapier |
1.10 |
|
969 |
|
|
path = getenv("PATH"); |
970 |
|
|
if (!path) |
971 |
|
|
err("PATH is not set in your env !"); |
972 |
vapier |
1.41 |
path = xstrdup(path); |
973 |
vapier |
1.10 |
|
974 |
|
|
while ((p = strrchr(path, ':')) != NULL) { |
975 |
|
|
scanelf_dir(p + 1); |
976 |
|
|
*p = 0; |
977 |
|
|
} |
978 |
vapier |
1.17 |
|
979 |
solar |
1.34 |
free(path); |
980 |
solar |
1.1 |
} |
981 |
|
|
|
982 |
|
|
|
983 |
vapier |
1.10 |
|
984 |
|
|
/* usage / invocation handling functions */ |
985 |
solar |
1.86 |
#define PARSE_FLAGS "plRmyxetrnibSs:gN:TaqvF:f:o:BhV" |
986 |
vapier |
1.27 |
#define a_argument required_argument |
987 |
vapier |
1.10 |
static struct option const long_opts[] = { |
988 |
|
|
{"path", no_argument, NULL, 'p'}, |
989 |
|
|
{"ldpath", no_argument, NULL, 'l'}, |
990 |
|
|
{"recursive", no_argument, NULL, 'R'}, |
991 |
vapier |
1.14 |
{"mount", no_argument, NULL, 'm'}, |
992 |
vapier |
1.37 |
{"symlink", no_argument, NULL, 'y'}, |
993 |
vapier |
1.10 |
{"pax", no_argument, NULL, 'x'}, |
994 |
solar |
1.16 |
{"header", no_argument, NULL, 'e'}, |
995 |
vapier |
1.10 |
{"textrel", no_argument, NULL, 't'}, |
996 |
|
|
{"rpath", no_argument, NULL, 'r'}, |
997 |
vapier |
1.32 |
{"needed", no_argument, NULL, 'n'}, |
998 |
vapier |
1.38 |
{"interp", no_argument, NULL, 'i'}, |
999 |
vapier |
1.49 |
{"bind", no_argument, NULL, 'b'}, |
1000 |
vapier |
1.84 |
{"soname", no_argument, NULL, 'S'}, |
1001 |
vapier |
1.76 |
{"symbol", a_argument, NULL, 's'}, |
1002 |
|
|
{"lib", a_argument, NULL, 'N'}, |
1003 |
solar |
1.86 |
{"gmatch", no_argument, NULL, 'g'}, |
1004 |
vapier |
1.76 |
{"textrels", no_argument, NULL, 'T'}, |
1005 |
vapier |
1.10 |
{"all", no_argument, NULL, 'a'}, |
1006 |
|
|
{"quiet", no_argument, NULL, 'q'}, |
1007 |
vapier |
1.14 |
{"verbose", no_argument, NULL, 'v'}, |
1008 |
vapier |
1.76 |
{"format", a_argument, NULL, 'F'}, |
1009 |
|
|
{"from", a_argument, NULL, 'f'}, |
1010 |
|
|
{"file", a_argument, NULL, 'o'}, |
1011 |
solar |
1.16 |
{"nobanner", no_argument, NULL, 'B'}, |
1012 |
vapier |
1.10 |
{"help", no_argument, NULL, 'h'}, |
1013 |
|
|
{"version", no_argument, NULL, 'V'}, |
1014 |
|
|
{NULL, no_argument, NULL, 0x0} |
1015 |
|
|
}; |
1016 |
solar |
1.57 |
|
1017 |
solar |
1.68 |
static const char *opts_help[] = { |
1018 |
vapier |
1.10 |
"Scan all directories in PATH environment", |
1019 |
|
|
"Scan all directories in /etc/ld.so.conf", |
1020 |
vapier |
1.14 |
"Scan directories recursively", |
1021 |
vapier |
1.37 |
"Don't recursively cross mount points", |
1022 |
|
|
"Don't scan symlinks\n", |
1023 |
vapier |
1.10 |
"Print PaX markings", |
1024 |
vapier |
1.71 |
"Print GNU_STACK/PT_LOAD markings", |
1025 |
vapier |
1.10 |
"Print TEXTREL information", |
1026 |
|
|
"Print RPATH information", |
1027 |
vapier |
1.32 |
"Print NEEDED information", |
1028 |
vapier |
1.38 |
"Print INTERP information", |
1029 |
vapier |
1.49 |
"Print BIND information", |
1030 |
vapier |
1.84 |
"Print SONAME information", |
1031 |
vapier |
1.27 |
"Find a specified symbol", |
1032 |
vapier |
1.72 |
"Find a specified library", |
1033 |
solar |
1.86 |
"Use strncmp to match libraries. (use with -N)", |
1034 |
vapier |
1.76 |
"Locate cause of TEXTREL", |
1035 |
vapier |
1.82 |
"Print all scanned info (-x -e -t -r -b)\n", |
1036 |
vapier |
1.14 |
"Only output 'bad' things", |
1037 |
|
|
"Be verbose (can be specified more than once)", |
1038 |
vapier |
1.39 |
"Use specified format for output", |
1039 |
solar |
1.45 |
"Read input stream from a filename", |
1040 |
vapier |
1.24 |
"Write output stream to a filename", |
1041 |
vapier |
1.14 |
"Don't display the header", |
1042 |
vapier |
1.10 |
"Print this help and exit", |
1043 |
|
|
"Print version and exit", |
1044 |
|
|
NULL |
1045 |
|
|
}; |
1046 |
|
|
|
1047 |
|
|
/* display usage and exit */ |
1048 |
|
|
static void usage(int status) |
1049 |
solar |
1.1 |
{ |
1050 |
vapier |
1.44 |
unsigned long i; |
1051 |
solar |
1.52 |
printf("* Scan ELF binaries for stuff\n\n" |
1052 |
solar |
1.35 |
"Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); |
1053 |
|
|
printf("Options: -[%s]\n", PARSE_FLAGS); |
1054 |
vapier |
1.10 |
for (i = 0; long_opts[i].name; ++i) |
1055 |
vapier |
1.27 |
if (long_opts[i].has_arg == no_argument) |
1056 |
solar |
1.52 |
printf(" -%c, --%-13s* %s\n", long_opts[i].val, |
1057 |
vapier |
1.27 |
long_opts[i].name, opts_help[i]); |
1058 |
|
|
else |
1059 |
solar |
1.52 |
printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val, |
1060 |
vapier |
1.27 |
long_opts[i].name, opts_help[i]); |
1061 |
solar |
1.45 |
|
1062 |
|
|
if (status != EXIT_SUCCESS) |
1063 |
|
|
exit(status); |
1064 |
|
|
|
1065 |
vapier |
1.46 |
puts("\nThe format modifiers for the -F option are:"); |
1066 |
vapier |
1.70 |
puts(" F Filename \tx PaX Flags \te STACK/RELRO"); |
1067 |
|
|
puts(" t TEXTREL \tr RPATH \tn NEEDED"); |
1068 |
|
|
puts(" i INTERP \tb BIND \ts symbol"); |
1069 |
vapier |
1.76 |
puts(" N library \to Type \tT TEXTRELs"); |
1070 |
vapier |
1.70 |
puts(" p filename (with search path removed)"); |
1071 |
|
|
puts(" f base filename"); |
1072 |
|
|
puts("Prefix each modifier with '%' (verbose) or '#' (silent)"); |
1073 |
solar |
1.45 |
|
1074 |
vapier |
1.10 |
exit(status); |
1075 |
solar |
1.1 |
} |
1076 |
|
|
|
1077 |
|
|
/* parse command line arguments and preform needed actions */ |
1078 |
vapier |
1.10 |
static void parseargs(int argc, char *argv[]) |
1079 |
|
|
{ |
1080 |
vapier |
1.48 |
int i; |
1081 |
solar |
1.45 |
char *from_file = NULL; |
1082 |
vapier |
1.10 |
|
1083 |
|
|
opterr = 0; |
1084 |
vapier |
1.48 |
while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { |
1085 |
|
|
switch (i) { |
1086 |
vapier |
1.10 |
|
1087 |
vapier |
1.39 |
case 'V': |
1088 |
vapier |
1.80 |
printf("pax-utils-%s: %s compiled %s\n%s\n" |
1089 |
|
|
"%s written for Gentoo by <solar and vapier @ gentoo.org>\n", |
1090 |
|
|
VERSION, __FILE__, __DATE__, rcsid, argv0); |
1091 |
vapier |
1.10 |
exit(EXIT_SUCCESS); |
1092 |
|
|
break; |
1093 |
|
|
case 'h': usage(EXIT_SUCCESS); break; |
1094 |
solar |
1.45 |
case 'f': |
1095 |
solar |
1.64 |
if (from_file) err("Don't specify -f twice"); |
1096 |
|
|
from_file = xstrdup(optarg); |
1097 |
solar |
1.45 |
break; |
1098 |
vapier |
1.24 |
case 'o': { |
1099 |
solar |
1.21 |
FILE *fp = NULL; |
1100 |
solar |
1.64 |
if ((fp = freopen(optarg, "w", stdout)) == NULL) |
1101 |
vapier |
1.24 |
err("Could not open output stream '%s': %s", optarg, strerror(errno)); |
1102 |
vapier |
1.65 |
SET_STDOUT(fp); |
1103 |
solar |
1.21 |
break; |
1104 |
|
|
} |
1105 |
vapier |
1.24 |
|
1106 |
vapier |
1.39 |
case 's': { |
1107 |
|
|
size_t len; |
1108 |
solar |
1.64 |
if (find_sym) err("Don't specify -s twice"); |
1109 |
vapier |
1.41 |
find_sym = xstrdup(optarg); |
1110 |
vapier |
1.39 |
len = strlen(find_sym) + 1; |
1111 |
vapier |
1.41 |
versioned_symname = (char*)xmalloc(sizeof(char) * (len+1)); |
1112 |
vapier |
1.39 |
sprintf(versioned_symname, "%s@", find_sym); |
1113 |
|
|
break; |
1114 |
|
|
} |
1115 |
vapier |
1.72 |
case 'N': { |
1116 |
|
|
if (find_lib) err("Don't specify -N twice"); |
1117 |
|
|
find_lib = xstrdup(optarg); |
1118 |
|
|
break; |
1119 |
|
|
} |
1120 |
vapier |
1.39 |
|
1121 |
|
|
case 'F': { |
1122 |
solar |
1.64 |
if (out_format) err("Don't specify -F twice"); |
1123 |
|
|
out_format = xstrdup(optarg); |
1124 |
vapier |
1.39 |
break; |
1125 |
|
|
} |
1126 |
vapier |
1.27 |
|
1127 |
solar |
1.86 |
case 'g': gmatch = 1; |
1128 |
vapier |
1.37 |
case 'y': scan_symlink = 0; break; |
1129 |
solar |
1.16 |
case 'B': show_banner = 0; break; |
1130 |
vapier |
1.10 |
case 'l': scan_ldpath = 1; break; |
1131 |
|
|
case 'p': scan_envpath = 1; break; |
1132 |
|
|
case 'R': dir_recurse = 1; break; |
1133 |
vapier |
1.14 |
case 'm': dir_crossmount = 0; break; |
1134 |
vapier |
1.10 |
case 'x': show_pax = 1; break; |
1135 |
solar |
1.73 |
case 'e': show_phdr = 1; break; |
1136 |
vapier |
1.10 |
case 't': show_textrel = 1; break; |
1137 |
|
|
case 'r': show_rpath = 1; break; |
1138 |
vapier |
1.32 |
case 'n': show_needed = 1; break; |
1139 |
vapier |
1.38 |
case 'i': show_interp = 1; break; |
1140 |
vapier |
1.49 |
case 'b': show_bind = 1; break; |
1141 |
vapier |
1.84 |
case 'S': show_soname = 1; break; |
1142 |
vapier |
1.76 |
case 'T': show_textrels = 1; break; |
1143 |
vapier |
1.10 |
case 'q': be_quiet = 1; break; |
1144 |
vapier |
1.14 |
case 'v': be_verbose = (be_verbose % 20) + 1; break; |
1145 |
vapier |
1.82 |
case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break; |
1146 |
vapier |
1.10 |
|
1147 |
|
|
case ':': |
1148 |
vapier |
1.49 |
err("Option missing parameter\n"); |
1149 |
vapier |
1.10 |
case '?': |
1150 |
vapier |
1.49 |
err("Unknown option\n"); |
1151 |
vapier |
1.10 |
default: |
1152 |
vapier |
1.48 |
err("Unhandled option '%c'", i); |
1153 |
vapier |
1.10 |
} |
1154 |
|
|
} |
1155 |
|
|
|
1156 |
vapier |
1.39 |
/* let the format option override all other options */ |
1157 |
|
|
if (out_format) { |
1158 |
solar |
1.73 |
show_pax = show_phdr = show_textrel = show_rpath = \ |
1159 |
vapier |
1.84 |
show_needed = show_interp = show_bind = show_soname = \ |
1160 |
|
|
show_textrels = 0; |
1161 |
vapier |
1.48 |
for (i = 0; out_format[i]; ++i) { |
1162 |
vapier |
1.70 |
if (!IS_MODIFIER(out_format[i])) continue; |
1163 |
vapier |
1.39 |
|
1164 |
vapier |
1.48 |
switch (out_format[++i]) { |
1165 |
vapier |
1.39 |
case '%': break; |
1166 |
vapier |
1.70 |
case '#': break; |
1167 |
vapier |
1.39 |
case 'F': break; |
1168 |
vapier |
1.66 |
case 'p': break; |
1169 |
|
|
case 'f': break; |
1170 |
vapier |
1.39 |
case 's': break; |
1171 |
vapier |
1.72 |
case 'N': break; |
1172 |
vapier |
1.41 |
case 'o': break; |
1173 |
vapier |
1.39 |
case 'x': show_pax = 1; break; |
1174 |
solar |
1.73 |
case 'e': show_phdr = 1; break; |
1175 |
vapier |
1.39 |
case 't': show_textrel = 1; break; |
1176 |
|
|
case 'r': show_rpath = 1; break; |
1177 |
|
|
case 'n': show_needed = 1; break; |
1178 |
|
|
case 'i': show_interp = 1; break; |
1179 |
vapier |
1.49 |
case 'b': show_bind = 1; break; |
1180 |
vapier |
1.84 |
case 'S': show_soname = 1; break; |
1181 |
vapier |
1.76 |
case 'T': show_textrels = 1; break; |
1182 |
vapier |
1.39 |
default: |
1183 |
|
|
err("Invalid format specifier '%c' (byte %i)", |
1184 |
vapier |
1.48 |
out_format[i], i+1); |
1185 |
vapier |
1.39 |
} |
1186 |
|
|
} |
1187 |
vapier |
1.41 |
|
1188 |
|
|
/* construct our default format */ |
1189 |
|
|
} else { |
1190 |
|
|
size_t fmt_len = 30; |
1191 |
|
|
out_format = (char*)xmalloc(sizeof(char) * fmt_len); |
1192 |
vapier |
1.76 |
if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); |
1193 |
|
|
if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); |
1194 |
|
|
if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); |
1195 |
|
|
if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); |
1196 |
|
|
if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); |
1197 |
|
|
if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); |
1198 |
|
|
if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); |
1199 |
|
|
if (show_bind) xstrcat(&out_format, "%b ", &fmt_len); |
1200 |
vapier |
1.84 |
if (show_soname) xstrcat(&out_format, "%S ", &fmt_len); |
1201 |
vapier |
1.76 |
if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len); |
1202 |
|
|
if (find_sym) xstrcat(&out_format, "%s ", &fmt_len); |
1203 |
|
|
if (find_lib) xstrcat(&out_format, "%N ", &fmt_len); |
1204 |
|
|
if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); |
1205 |
vapier |
1.39 |
} |
1206 |
vapier |
1.41 |
if (be_verbose > 2) printf("Format: %s\n", out_format); |
1207 |
vapier |
1.39 |
|
1208 |
|
|
/* now lets actually do the scanning */ |
1209 |
vapier |
1.48 |
if (scan_ldpath || (show_rpath && be_quiet)) |
1210 |
|
|
load_ld_so_conf(); |
1211 |
vapier |
1.10 |
if (scan_ldpath) scanelf_ldpath(); |
1212 |
|
|
if (scan_envpath) scanelf_envpath(); |
1213 |
solar |
1.45 |
if (from_file) { |
1214 |
|
|
scanelf_from_file(from_file); |
1215 |
|
|
free(from_file); |
1216 |
|
|
from_file = *argv; |
1217 |
|
|
} |
1218 |
|
|
if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) |
1219 |
vapier |
1.25 |
err("Nothing to scan !?"); |
1220 |
vapier |
1.66 |
while (optind < argc) { |
1221 |
|
|
search_path = argv[optind++]; |
1222 |
|
|
scanelf_dir(search_path); |
1223 |
|
|
} |
1224 |
vapier |
1.27 |
|
1225 |
vapier |
1.39 |
/* clean up */ |
1226 |
|
|
if (find_sym) { |
1227 |
|
|
free(find_sym); |
1228 |
|
|
free(versioned_symname); |
1229 |
|
|
} |
1230 |
vapier |
1.72 |
if (find_lib) free(find_lib); |
1231 |
vapier |
1.39 |
if (out_format) free(out_format); |
1232 |
vapier |
1.48 |
for (i = 0; ldpaths[i]; ++i) |
1233 |
|
|
free(ldpaths[i]); |
1234 |
vapier |
1.10 |
} |
1235 |
|
|
|
1236 |
|
|
|
1237 |
|
|
|
1238 |
vapier |
1.41 |
/* utility funcs */ |
1239 |
vapier |
1.60 |
static char *xstrdup(const char *s) |
1240 |
vapier |
1.41 |
{ |
1241 |
|
|
char *ret = strdup(s); |
1242 |
|
|
if (!ret) err("Could not strdup(): %s", strerror(errno)); |
1243 |
|
|
return ret; |
1244 |
|
|
} |
1245 |
solar |
1.57 |
|
1246 |
vapier |
1.41 |
static void *xmalloc(size_t size) |
1247 |
|
|
{ |
1248 |
|
|
void *ret = malloc(size); |
1249 |
|
|
if (!ret) err("Could not malloc() %li bytes", (unsigned long)size); |
1250 |
|
|
return ret; |
1251 |
|
|
} |
1252 |
solar |
1.57 |
|
1253 |
vapier |
1.41 |
static void xstrcat(char **dst, const char *src, size_t *curr_len) |
1254 |
|
|
{ |
1255 |
vapier |
1.69 |
size_t new_len; |
1256 |
vapier |
1.41 |
|
1257 |
|
|
new_len = strlen(*dst) + strlen(src); |
1258 |
|
|
if (*curr_len <= new_len) { |
1259 |
|
|
*curr_len = new_len + (*curr_len / 2); |
1260 |
|
|
*dst = realloc(*dst, *curr_len); |
1261 |
|
|
if (!*dst) |
1262 |
|
|
err("could not realloc %li bytes", (unsigned long)*curr_len); |
1263 |
|
|
} |
1264 |
|
|
|
1265 |
|
|
strcat(*dst, src); |
1266 |
|
|
} |
1267 |
solar |
1.57 |
|
1268 |
vapier |
1.41 |
static inline void xchrcat(char **dst, const char append, size_t *curr_len) |
1269 |
|
|
{ |
1270 |
|
|
static char my_app[2]; |
1271 |
|
|
my_app[0] = append; |
1272 |
|
|
my_app[1] = '\0'; |
1273 |
|
|
xstrcat(dst, my_app, curr_len); |
1274 |
|
|
} |
1275 |
|
|
|
1276 |
|
|
|
1277 |
vapier |
1.72 |
|
1278 |
vapier |
1.10 |
int main(int argc, char *argv[]) |
1279 |
solar |
1.1 |
{ |
1280 |
vapier |
1.10 |
if (argc < 2) |
1281 |
|
|
usage(EXIT_FAILURE); |
1282 |
|
|
parseargs(argc, argv); |
1283 |
solar |
1.21 |
fclose(stdout); |
1284 |
solar |
1.61 |
#ifdef __BOUNDS_CHECKING_ON |
1285 |
vapier |
1.66 |
warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()"); |
1286 |
solar |
1.61 |
#endif |
1287 |
vapier |
1.10 |
return EXIT_SUCCESS; |
1288 |
solar |
1.1 |
} |