1 |
solar |
1.1 |
/* |
2 |
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* Copyright 2003 Ned Ludd <solar@gentoo.org> |
3 |
vapier |
1.8 |
* Copyright 1999-2005 Gentoo Foundation |
4 |
solar |
1.1 |
* Distributed under the terms of the GNU General Public License v2 |
5 |
solar |
1.61 |
* $Header: /var/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.60 2005/05/27 02:58:39 vapier Exp $ |
6 |
solar |
1.1 |
* |
7 |
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******************************************************************** |
8 |
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* This program is free software; you can redistribute it and/or |
9 |
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* modify it under the terms of the GNU General Public License as |
10 |
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* published by the Free Software Foundation; either version 2 of the |
11 |
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* License, or (at your option) any later version. |
12 |
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* |
13 |
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* This program is distributed in the hope that it will be useful, but |
14 |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
15 |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 |
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* General Public License for more details. |
17 |
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* |
18 |
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* You should have received a copy of the GNU General Public License |
19 |
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* along with this program; if not, write to the Free Software |
20 |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
21 |
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* MA 02111-1307, USA. |
22 |
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*/ |
23 |
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24 |
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#include <stdio.h> |
25 |
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#include <stdlib.h> |
26 |
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#include <sys/types.h> |
27 |
vapier |
1.60 |
#include <libgen.h> |
28 |
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#include <limits.h> |
29 |
solar |
1.28 |
#define __USE_GNU |
30 |
solar |
1.1 |
#include <string.h> |
31 |
vapier |
1.10 |
#include <errno.h> |
32 |
solar |
1.1 |
#include <unistd.h> |
33 |
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#include <sys/stat.h> |
34 |
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#include <dirent.h> |
35 |
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#include <getopt.h> |
36 |
solar |
1.20 |
#include <assert.h> |
37 |
solar |
1.1 |
#include "paxelf.h" |
38 |
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|
39 |
solar |
1.61 |
static const char *rcsid = "$Id: scanelf.c,v 1.60 2005/05/27 02:58:39 vapier Exp $"; |
40 |
vapier |
1.36 |
#define argv0 "scanelf" |
41 |
vapier |
1.10 |
|
42 |
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43 |
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44 |
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/* prototypes */ |
45 |
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static void scanelf_file(const char *filename); |
46 |
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static void scanelf_dir(const char *path); |
47 |
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static void scanelf_ldpath(); |
48 |
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static void scanelf_envpath(); |
49 |
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static void usage(int status); |
50 |
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static void parseargs(int argc, char *argv[]); |
51 |
vapier |
1.60 |
static char *xstrdup(const char *s); |
52 |
vapier |
1.41 |
static void *xmalloc(size_t size); |
53 |
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static void xstrcat(char **dst, const char *src, size_t *curr_len); |
54 |
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static inline void xchrcat(char **dst, const char append, size_t *curr_len); |
55 |
vapier |
1.10 |
|
56 |
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/* variables to control behavior */ |
57 |
vapier |
1.48 |
static char *ldpaths[256]; |
58 |
vapier |
1.10 |
static char scan_ldpath = 0; |
59 |
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static char scan_envpath = 0; |
60 |
vapier |
1.37 |
static char scan_symlink = 1; |
61 |
vapier |
1.10 |
static char dir_recurse = 0; |
62 |
vapier |
1.14 |
static char dir_crossmount = 1; |
63 |
vapier |
1.10 |
static char show_pax = 0; |
64 |
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static char show_stack = 0; |
65 |
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static char show_textrel = 0; |
66 |
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static char show_rpath = 0; |
67 |
vapier |
1.32 |
static char show_needed = 0; |
68 |
vapier |
1.38 |
static char show_interp = 0; |
69 |
vapier |
1.49 |
static char show_bind = 0; |
70 |
solar |
1.16 |
static char show_banner = 1; |
71 |
vapier |
1.10 |
static char be_quiet = 0; |
72 |
vapier |
1.14 |
static char be_verbose = 0; |
73 |
vapier |
1.39 |
static char *find_sym = NULL, *versioned_symname = NULL; |
74 |
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static char *out_format = NULL; |
75 |
vapier |
1.10 |
|
76 |
solar |
1.1 |
|
77 |
vapier |
1.39 |
/* sub-funcs for scanelf_file() */ |
78 |
vapier |
1.41 |
static char *scanelf_file_pax(elfobj *elf, char *found_pax) |
79 |
solar |
1.6 |
{ |
80 |
vapier |
1.41 |
static char *paxflags; |
81 |
solar |
1.61 |
static char ret[7]; |
82 |
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unsigned long i, shown; |
83 |
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|
84 |
vapier |
1.41 |
|
85 |
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if (!show_pax) return NULL; |
86 |
vapier |
1.10 |
|
87 |
solar |
1.61 |
shown = 0; |
88 |
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memset(&ret, 0, sizeof(ret)); |
89 |
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|
90 |
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if (elf->phdr) { |
91 |
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#define SHOW_PAX(B) \ |
92 |
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if (elf->elf_class == ELFCLASS ## B) { \ |
93 |
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Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
94 |
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Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
95 |
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for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
96 |
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if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \ |
97 |
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continue; \ |
98 |
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if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \ |
99 |
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continue; \ |
100 |
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memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \ |
101 |
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*found_pax = 1; \ |
102 |
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++shown; \ |
103 |
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break; \ |
104 |
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} \ |
105 |
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} |
106 |
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SHOW_PAX(32) |
107 |
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SHOW_PAX(64) |
108 |
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} |
109 |
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110 |
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/* fall back to EI_PAX if no PT_PAX was found */ |
111 |
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if (!*ret) { |
112 |
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paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); |
113 |
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if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) { |
114 |
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*found_pax = 1; |
115 |
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return paxflags; |
116 |
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} |
117 |
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strncpy(ret, paxflags, sizeof(ret)); |
118 |
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// ++shown; |
119 |
vapier |
1.14 |
} |
120 |
vapier |
1.41 |
|
121 |
solar |
1.61 |
if (be_quiet && !shown) |
122 |
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return NULL; |
123 |
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return ret; |
124 |
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|
125 |
vapier |
1.39 |
} |
126 |
vapier |
1.41 |
static char *scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro) |
127 |
vapier |
1.39 |
{ |
128 |
solar |
1.57 |
static char ret[8] = "--- ---"; |
129 |
vapier |
1.41 |
char *found; |
130 |
vapier |
1.44 |
unsigned long i, off, shown; |
131 |
vapier |
1.41 |
|
132 |
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if (!show_stack) return NULL; |
133 |
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|
134 |
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shown = 0; |
135 |
vapier |
1.44 |
|
136 |
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if (elf->phdr) { |
137 |
vapier |
1.26 |
#define SHOW_STACK(B) \ |
138 |
vapier |
1.39 |
if (elf->elf_class == ELFCLASS ## B) { \ |
139 |
|
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Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
140 |
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Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
141 |
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for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
142 |
vapier |
1.41 |
if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ |
143 |
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found = found_stack; \ |
144 |
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off = 0; \ |
145 |
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} else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \ |
146 |
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found = found_relro; \ |
147 |
solar |
1.53 |
off = 4; \ |
148 |
vapier |
1.41 |
} else \ |
149 |
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continue; \ |
150 |
vapier |
1.39 |
if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \ |
151 |
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continue; \ |
152 |
vapier |
1.41 |
memcpy(ret+off, gnu_short_stack_flags(EGET(phdr[i].p_flags)), 3); \ |
153 |
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*found = 1; \ |
154 |
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++shown; \ |
155 |
vapier |
1.39 |
} \ |
156 |
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} |
157 |
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SHOW_STACK(32) |
158 |
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SHOW_STACK(64) |
159 |
vapier |
1.44 |
} |
160 |
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|
161 |
vapier |
1.41 |
if (be_quiet && !shown) |
162 |
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return NULL; |
163 |
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else |
164 |
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return ret; |
165 |
vapier |
1.39 |
} |
166 |
vapier |
1.41 |
static char *scanelf_file_textrel(elfobj *elf, char *found_textrel) |
167 |
vapier |
1.39 |
{ |
168 |
vapier |
1.41 |
static char *ret = "TEXTREL"; |
169 |
vapier |
1.44 |
unsigned long i; |
170 |
vapier |
1.41 |
|
171 |
|
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if (!show_textrel) return NULL; |
172 |
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173 |
vapier |
1.44 |
if (elf->phdr) { |
174 |
vapier |
1.39 |
#define SHOW_TEXTREL(B) \ |
175 |
|
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if (elf->elf_class == ELFCLASS ## B) { \ |
176 |
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Elf ## B ## _Dyn *dyn; \ |
177 |
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Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
178 |
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Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
179 |
vapier |
1.44 |
Elf ## B ## _Off offset; \ |
180 |
vapier |
1.39 |
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
181 |
vapier |
1.59 |
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
182 |
vapier |
1.44 |
offset = EGET(phdr[i].p_offset); \ |
183 |
|
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if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
184 |
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dyn = DYN ## B (elf->data + offset); \ |
185 |
vapier |
1.39 |
while (EGET(dyn->d_tag) != DT_NULL) { \ |
186 |
|
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if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ |
187 |
|
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*found_textrel = 1; \ |
188 |
|
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/*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ |
189 |
vapier |
1.41 |
return ret; \ |
190 |
vapier |
1.39 |
} \ |
191 |
|
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++dyn; \ |
192 |
vapier |
1.26 |
} \ |
193 |
vapier |
1.39 |
} } |
194 |
|
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SHOW_TEXTREL(32) |
195 |
|
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SHOW_TEXTREL(64) |
196 |
vapier |
1.44 |
} |
197 |
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|
198 |
vapier |
1.41 |
if (be_quiet) |
199 |
|
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return NULL; |
200 |
|
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else |
201 |
|
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return " - "; |
202 |
vapier |
1.39 |
} |
203 |
vapier |
1.41 |
static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) |
204 |
vapier |
1.39 |
{ |
205 |
vapier |
1.48 |
/* TODO: when checking RPATH entries, check each subpath (between :) in ld.so.conf */ |
206 |
|
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unsigned long i, s; |
207 |
|
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char *rpath, *runpath, **r; |
208 |
vapier |
1.39 |
void *strtbl_void; |
209 |
vapier |
1.10 |
|
210 |
vapier |
1.39 |
if (!show_rpath) return; |
211 |
vapier |
1.10 |
|
212 |
vapier |
1.39 |
strtbl_void = elf_findsecbyname(elf, ".dynstr"); |
213 |
|
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rpath = runpath = NULL; |
214 |
vapier |
1.10 |
|
215 |
vapier |
1.44 |
if (elf->phdr && strtbl_void) { |
216 |
vapier |
1.26 |
#define SHOW_RPATH(B) \ |
217 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
218 |
|
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Elf ## B ## _Dyn *dyn; \ |
219 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
220 |
|
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Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
221 |
|
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Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ |
222 |
vapier |
1.44 |
Elf ## B ## _Off offset; \ |
223 |
vapier |
1.60 |
Elf ## B ## _Xword word; \ |
224 |
vapier |
1.48 |
/* Scan all the program headers */ \ |
225 |
vapier |
1.26 |
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
226 |
vapier |
1.48 |
/* Just scan dynamic headers */ \ |
227 |
vapier |
1.26 |
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
228 |
vapier |
1.44 |
offset = EGET(phdr[i].p_offset); \ |
229 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
230 |
vapier |
1.48 |
/* Just scan dynamic RPATH/RUNPATH headers */ \ |
231 |
vapier |
1.44 |
dyn = DYN ## B (elf->data + offset); \ |
232 |
vapier |
1.48 |
while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ |
233 |
|
|
if (word == DT_RPATH) { \ |
234 |
|
|
r = &rpath; \ |
235 |
|
|
} else if (word == DT_RUNPATH) { \ |
236 |
|
|
r = &runpath; \ |
237 |
|
|
} else { \ |
238 |
|
|
++dyn; \ |
239 |
|
|
continue; \ |
240 |
|
|
} \ |
241 |
|
|
/* Verify the memory is somewhat sane */ \ |
242 |
|
|
offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ |
243 |
|
|
if (offset < elf->len) { \ |
244 |
|
|
if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ |
245 |
|
|
*r = (char*)(elf->data + offset); \ |
246 |
|
|
/* If quiet, don't output paths in ld.so.conf */ \ |
247 |
|
|
if (be_quiet) \ |
248 |
|
|
for (s = 0; ldpaths[s]; ++s) \ |
249 |
|
|
if (!strcmp(ldpaths[s], *r)) { \ |
250 |
|
|
*r = NULL; \ |
251 |
|
|
break; \ |
252 |
|
|
} \ |
253 |
|
|
if (*r) *found_rpath = 1; \ |
254 |
vapier |
1.26 |
} \ |
255 |
|
|
++dyn; \ |
256 |
|
|
} \ |
257 |
|
|
} } |
258 |
|
|
SHOW_RPATH(32) |
259 |
|
|
SHOW_RPATH(64) |
260 |
vapier |
1.10 |
} |
261 |
vapier |
1.41 |
|
262 |
vapier |
1.39 |
if (rpath && runpath) { |
263 |
vapier |
1.41 |
if (!strcmp(rpath, runpath)) { |
264 |
|
|
xstrcat(ret, runpath, ret_len); |
265 |
|
|
} else { |
266 |
vapier |
1.39 |
fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath); |
267 |
vapier |
1.41 |
xchrcat(ret, '{', ret_len); |
268 |
|
|
xstrcat(ret, rpath, ret_len); |
269 |
|
|
xchrcat(ret, ',', ret_len); |
270 |
|
|
xstrcat(ret, runpath, ret_len); |
271 |
|
|
xchrcat(ret, '}', ret_len); |
272 |
vapier |
1.39 |
} |
273 |
|
|
} else if (rpath || runpath) |
274 |
vapier |
1.41 |
xstrcat(ret, (runpath ? runpath : rpath), ret_len); |
275 |
|
|
else if (!be_quiet) |
276 |
|
|
xstrcat(ret, " - ", ret_len); |
277 |
vapier |
1.39 |
} |
278 |
vapier |
1.41 |
static void scanelf_file_needed(elfobj *elf, char *found_needed, char **ret, size_t *ret_len) |
279 |
vapier |
1.39 |
{ |
280 |
vapier |
1.44 |
unsigned long i; |
281 |
vapier |
1.39 |
char *needed; |
282 |
|
|
void *strtbl_void; |
283 |
|
|
|
284 |
|
|
if (!show_needed) return; |
285 |
vapier |
1.10 |
|
286 |
vapier |
1.39 |
strtbl_void = elf_findsecbyname(elf, ".dynstr"); |
287 |
vapier |
1.32 |
|
288 |
vapier |
1.44 |
if (elf->phdr && strtbl_void) { |
289 |
vapier |
1.32 |
#define SHOW_NEEDED(B) \ |
290 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
291 |
|
|
Elf ## B ## _Dyn *dyn; \ |
292 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
293 |
|
|
Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
294 |
|
|
Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ |
295 |
vapier |
1.44 |
Elf ## B ## _Off offset; \ |
296 |
vapier |
1.32 |
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
297 |
|
|
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
298 |
vapier |
1.44 |
offset = EGET(phdr[i].p_offset); \ |
299 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
300 |
|
|
dyn = DYN ## B (elf->data + offset); \ |
301 |
vapier |
1.32 |
while (EGET(dyn->d_tag) != DT_NULL) { \ |
302 |
|
|
if (EGET(dyn->d_tag) == DT_NEEDED) { \ |
303 |
vapier |
1.44 |
offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ |
304 |
vapier |
1.49 |
if (offset >= elf->len) { \ |
305 |
|
|
++dyn; \ |
306 |
|
|
continue; \ |
307 |
|
|
} \ |
308 |
vapier |
1.44 |
needed = (char*)(elf->data + offset); \ |
309 |
vapier |
1.41 |
if (*found_needed) xchrcat(ret, ',', ret_len); \ |
310 |
|
|
xstrcat(ret, needed, ret_len); \ |
311 |
vapier |
1.39 |
*found_needed = 1; \ |
312 |
vapier |
1.32 |
} \ |
313 |
|
|
++dyn; \ |
314 |
|
|
} \ |
315 |
|
|
} } |
316 |
|
|
SHOW_NEEDED(32) |
317 |
|
|
SHOW_NEEDED(64) |
318 |
|
|
} |
319 |
vapier |
1.39 |
} |
320 |
vapier |
1.41 |
static char *scanelf_file_interp(elfobj *elf, char *found_interp) |
321 |
vapier |
1.39 |
{ |
322 |
|
|
void *strtbl_void; |
323 |
|
|
|
324 |
vapier |
1.41 |
if (!show_interp) return NULL; |
325 |
vapier |
1.32 |
|
326 |
vapier |
1.39 |
strtbl_void = elf_findsecbyname(elf, ".interp"); |
327 |
vapier |
1.38 |
|
328 |
vapier |
1.39 |
if (strtbl_void) { |
329 |
vapier |
1.38 |
#define SHOW_INTERP(B) \ |
330 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
331 |
solar |
1.40 |
Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ |
332 |
|
|
*found_interp = 1; \ |
333 |
vapier |
1.41 |
return elf->data + EGET(strtbl->sh_offset); \ |
334 |
vapier |
1.38 |
} |
335 |
|
|
SHOW_INTERP(32) |
336 |
|
|
SHOW_INTERP(64) |
337 |
|
|
} |
338 |
vapier |
1.41 |
return NULL; |
339 |
vapier |
1.39 |
} |
340 |
vapier |
1.49 |
static char *scanelf_file_bind(elfobj *elf, char *found_bind) |
341 |
|
|
{ |
342 |
|
|
unsigned long i; |
343 |
|
|
struct stat s; |
344 |
|
|
|
345 |
|
|
if (!show_bind) return NULL; |
346 |
vapier |
1.51 |
if (!elf->phdr) return NULL; |
347 |
vapier |
1.49 |
|
348 |
|
|
#define SHOW_BIND(B) \ |
349 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
350 |
|
|
Elf ## B ## _Dyn *dyn; \ |
351 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
352 |
|
|
Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
353 |
|
|
Elf ## B ## _Off offset; \ |
354 |
|
|
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
355 |
|
|
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
356 |
|
|
offset = EGET(phdr[i].p_offset); \ |
357 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
358 |
|
|
dyn = DYN ## B (elf->data + offset); \ |
359 |
|
|
while (EGET(dyn->d_tag) != DT_NULL) { \ |
360 |
|
|
if (EGET(dyn->d_tag) == DT_BIND_NOW || \ |
361 |
|
|
(EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \ |
362 |
|
|
{ \ |
363 |
|
|
if (be_quiet) return NULL; \ |
364 |
|
|
*found_bind = 1; \ |
365 |
|
|
return "NOW"; \ |
366 |
|
|
} \ |
367 |
|
|
++dyn; \ |
368 |
|
|
} \ |
369 |
|
|
} \ |
370 |
|
|
} |
371 |
|
|
SHOW_BIND(32) |
372 |
|
|
SHOW_BIND(64) |
373 |
|
|
|
374 |
vapier |
1.56 |
if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) { |
375 |
vapier |
1.49 |
return NULL; |
376 |
|
|
} else { |
377 |
|
|
*found_bind = 1; |
378 |
|
|
return "LAZY"; |
379 |
|
|
} |
380 |
|
|
} |
381 |
vapier |
1.41 |
static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename) |
382 |
vapier |
1.39 |
{ |
383 |
vapier |
1.44 |
unsigned long i; |
384 |
vapier |
1.39 |
void *symtab_void, *strtab_void; |
385 |
vapier |
1.38 |
|
386 |
vapier |
1.41 |
if (!find_sym) return NULL; |
387 |
vapier |
1.32 |
|
388 |
vapier |
1.39 |
symtab_void = elf_findsecbyname(elf, ".symtab"); |
389 |
|
|
strtab_void = elf_findsecbyname(elf, ".strtab"); |
390 |
vapier |
1.27 |
|
391 |
vapier |
1.39 |
if (symtab_void && strtab_void) { |
392 |
vapier |
1.60 |
char *base, *basemem; |
393 |
|
|
basemem = xstrdup(filename); |
394 |
|
|
base = basename(basemem); |
395 |
vapier |
1.27 |
#define FIND_SYM(B) \ |
396 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
397 |
|
|
Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ |
398 |
|
|
Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ |
399 |
|
|
Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ |
400 |
vapier |
1.44 |
unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ |
401 |
vapier |
1.27 |
char *symname; \ |
402 |
|
|
for (i = 0; i < cnt; ++i) { \ |
403 |
|
|
if (sym->st_name) { \ |
404 |
|
|
symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ |
405 |
solar |
1.28 |
if (*find_sym == '*') { \ |
406 |
vapier |
1.32 |
printf("%s(%s) %5lX %15s %s\n", \ |
407 |
vapier |
1.39 |
((*found_sym == 0) ? "\n\t" : "\t"), \ |
408 |
vapier |
1.60 |
base, \ |
409 |
vapier |
1.32 |
(long)sym->st_size, \ |
410 |
|
|
(char *)get_elfstttype(sym->st_info), \ |
411 |
|
|
symname); \ |
412 |
vapier |
1.39 |
*found_sym = 1; \ |
413 |
vapier |
1.32 |
} else if ((strcmp(find_sym, symname) == 0) || \ |
414 |
vapier |
1.39 |
(strcmp(symname, versioned_symname) == 0)) \ |
415 |
|
|
(*found_sym)++; \ |
416 |
vapier |
1.27 |
} \ |
417 |
|
|
++sym; \ |
418 |
|
|
} } |
419 |
|
|
FIND_SYM(32) |
420 |
|
|
FIND_SYM(64) |
421 |
vapier |
1.60 |
free(basemem); |
422 |
vapier |
1.39 |
} |
423 |
vapier |
1.41 |
if (*find_sym != '*' && *found_sym) |
424 |
|
|
return find_sym; |
425 |
|
|
if (be_quiet) |
426 |
|
|
return NULL; |
427 |
|
|
else |
428 |
|
|
return " - "; |
429 |
vapier |
1.39 |
} |
430 |
|
|
/* scan an elf file and show all the fun stuff */ |
431 |
solar |
1.57 |
// #define prints(str) fputs(str, stdout) |
432 |
|
|
#define prints(str) write(fileno(stdout), str, strlen(str)) |
433 |
vapier |
1.39 |
static void scanelf_file(const char *filename) |
434 |
|
|
{ |
435 |
vapier |
1.44 |
unsigned long i; |
436 |
vapier |
1.39 |
char found_pax, found_stack, found_relro, found_textrel, |
437 |
vapier |
1.49 |
found_rpath, found_needed, found_interp, found_bind, |
438 |
|
|
found_sym, found_file; |
439 |
vapier |
1.39 |
elfobj *elf; |
440 |
|
|
struct stat st; |
441 |
vapier |
1.41 |
static char *out_buffer = NULL; |
442 |
|
|
static size_t out_len; |
443 |
vapier |
1.39 |
|
444 |
|
|
/* make sure 'filename' exists */ |
445 |
|
|
if (lstat(filename, &st) == -1) { |
446 |
|
|
if (be_verbose > 2) printf("%s: does not exist\n", filename); |
447 |
|
|
return; |
448 |
|
|
} |
449 |
|
|
/* always handle regular files and handle symlinked files if no -y */ |
450 |
vapier |
1.55 |
if (S_ISLNK(st.st_mode)) { |
451 |
|
|
if (!scan_symlink) return; |
452 |
|
|
stat(filename, &st); |
453 |
|
|
} |
454 |
|
|
if (!S_ISREG(st.st_mode)) { |
455 |
vapier |
1.39 |
if (be_verbose > 2) printf("%s: skipping non-file\n", filename); |
456 |
|
|
return; |
457 |
|
|
} |
458 |
|
|
|
459 |
|
|
found_pax = found_stack = found_relro = found_textrel = \ |
460 |
vapier |
1.49 |
found_rpath = found_needed = found_interp = found_bind = \ |
461 |
|
|
found_sym = found_file = 0; |
462 |
vapier |
1.39 |
|
463 |
|
|
/* verify this is real ELF */ |
464 |
|
|
if ((elf = readelf(filename)) == NULL) { |
465 |
|
|
if (be_verbose > 2) printf("%s: not an ELF\n", filename); |
466 |
|
|
return; |
467 |
|
|
} |
468 |
|
|
|
469 |
|
|
if (be_verbose > 1) |
470 |
vapier |
1.41 |
printf("%s: scanning file {%s,%s}\n", filename, |
471 |
vapier |
1.39 |
get_elfeitype(elf, EI_CLASS, elf->elf_class), |
472 |
|
|
get_elfeitype(elf, EI_DATA, elf->data[EI_DATA])); |
473 |
|
|
else if (be_verbose) |
474 |
|
|
printf("%s: scanning file\n", filename); |
475 |
|
|
|
476 |
vapier |
1.41 |
/* init output buffer */ |
477 |
|
|
if (!out_buffer) { |
478 |
|
|
out_len = sizeof(char) * 80; |
479 |
|
|
out_buffer = (char*)xmalloc(out_len); |
480 |
|
|
} |
481 |
|
|
*out_buffer = '\0'; |
482 |
|
|
|
483 |
vapier |
1.39 |
/* show the header */ |
484 |
|
|
if (!be_quiet && show_banner) { |
485 |
vapier |
1.49 |
for (i = 0; out_format[i]; ++i) { |
486 |
vapier |
1.41 |
if (out_format[i] != '%') continue; |
487 |
|
|
|
488 |
|
|
switch (out_format[++i]) { |
489 |
|
|
case '%': break; |
490 |
vapier |
1.49 |
case 'F': prints("FILE "); found_file = 1; break; |
491 |
vapier |
1.41 |
case 'o': prints(" TYPE "); break; |
492 |
|
|
case 'x': prints(" PAX "); break; |
493 |
|
|
case 'e': prints("STK/REL "); break; |
494 |
|
|
case 't': prints("TEXTREL "); break; |
495 |
|
|
case 'r': prints("RPATH "); break; |
496 |
|
|
case 'n': prints("NEEDED "); break; |
497 |
|
|
case 'i': prints("INTERP "); break; |
498 |
vapier |
1.49 |
case 'b': prints("BIND "); break; |
499 |
vapier |
1.41 |
case 's': prints("SYM "); break; |
500 |
vapier |
1.39 |
} |
501 |
vapier |
1.27 |
} |
502 |
vapier |
1.49 |
if (!found_file) prints("FILE "); |
503 |
vapier |
1.41 |
prints("\n"); |
504 |
vapier |
1.49 |
found_file = 0; |
505 |
vapier |
1.39 |
show_banner = 0; |
506 |
|
|
} |
507 |
|
|
|
508 |
|
|
/* dump all the good stuff */ |
509 |
vapier |
1.49 |
for (i = 0; out_format[i]; ++i) { |
510 |
vapier |
1.41 |
const char *out; |
511 |
|
|
|
512 |
|
|
/* make sure we trim leading spaces in quiet mode */ |
513 |
|
|
if (be_quiet && *out_buffer == ' ' && !out_buffer[1]) |
514 |
|
|
*out_buffer = '\0'; |
515 |
vapier |
1.39 |
|
516 |
vapier |
1.41 |
if (out_format[i] != '%') { |
517 |
|
|
xchrcat(&out_buffer, out_format[i], &out_len); |
518 |
|
|
continue; |
519 |
|
|
} |
520 |
vapier |
1.39 |
|
521 |
vapier |
1.41 |
out = NULL; |
522 |
|
|
switch (out_format[++i]) { |
523 |
|
|
case '%': xchrcat(&out_buffer, '%', &out_len); break; |
524 |
|
|
case 'F': found_file = 1; xstrcat(&out_buffer, filename, &out_len); break; |
525 |
|
|
case 'o': out = get_elfetype(elf); break; |
526 |
|
|
case 'x': out = scanelf_file_pax(elf, &found_pax); break; |
527 |
|
|
case 'e': out = scanelf_file_stack(elf, &found_stack, &found_relro); break; |
528 |
|
|
case 't': out = scanelf_file_textrel(elf, &found_textrel); break; |
529 |
|
|
case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; |
530 |
|
|
case 'n': scanelf_file_needed(elf, &found_needed, &out_buffer, &out_len); break; |
531 |
|
|
case 'i': out = scanelf_file_interp(elf, &found_interp); break; |
532 |
vapier |
1.49 |
case 'b': out = scanelf_file_bind(elf, &found_bind); break; |
533 |
vapier |
1.41 |
case 's': out = scanelf_file_sym(elf, &found_sym, filename); break; |
534 |
vapier |
1.29 |
} |
535 |
vapier |
1.41 |
if (out) xstrcat(&out_buffer, out, &out_len); |
536 |
vapier |
1.39 |
} |
537 |
|
|
|
538 |
vapier |
1.54 |
#define FOUND_SOMETHING() \ |
539 |
|
|
(found_pax || found_stack || found_textrel || found_rpath || \ |
540 |
|
|
found_needed || found_interp || found_bind || found_sym) |
541 |
|
|
|
542 |
|
|
if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { |
543 |
|
|
xchrcat(&out_buffer, ' ', &out_len); |
544 |
|
|
xstrcat(&out_buffer, filename, &out_len); |
545 |
vapier |
1.27 |
} |
546 |
vapier |
1.54 |
if (!be_quiet || (be_quiet && FOUND_SOMETHING())) |
547 |
vapier |
1.41 |
puts(out_buffer); |
548 |
vapier |
1.10 |
|
549 |
|
|
unreadelf(elf); |
550 |
solar |
1.6 |
} |
551 |
|
|
|
552 |
solar |
1.1 |
/* scan a directory for ET_EXEC files and print when we find one */ |
553 |
vapier |
1.10 |
static void scanelf_dir(const char *path) |
554 |
solar |
1.1 |
{ |
555 |
vapier |
1.10 |
register DIR *dir; |
556 |
|
|
register struct dirent *dentry; |
557 |
vapier |
1.14 |
struct stat st_top, st; |
558 |
solar |
1.21 |
char buf[_POSIX_PATH_MAX]; |
559 |
vapier |
1.32 |
size_t pathlen = 0, len = 0; |
560 |
vapier |
1.10 |
|
561 |
|
|
/* make sure path exists */ |
562 |
vapier |
1.39 |
if (lstat(path, &st_top) == -1) { |
563 |
|
|
if (be_verbose > 2) printf("%s: does not exist\n", path); |
564 |
vapier |
1.10 |
return; |
565 |
vapier |
1.39 |
} |
566 |
solar |
1.11 |
|
567 |
vapier |
1.10 |
/* ok, if it isn't a directory, assume we can open it */ |
568 |
vapier |
1.14 |
if (!S_ISDIR(st_top.st_mode)) { |
569 |
vapier |
1.10 |
scanelf_file(path); |
570 |
|
|
return; |
571 |
|
|
} |
572 |
|
|
|
573 |
|
|
/* now scan the dir looking for fun stuff */ |
574 |
|
|
if ((dir = opendir(path)) == NULL) { |
575 |
|
|
warnf("could not opendir %s: %s", path, strerror(errno)); |
576 |
|
|
return; |
577 |
|
|
} |
578 |
vapier |
1.15 |
if (be_verbose) printf("%s: scanning dir\n", path); |
579 |
solar |
1.11 |
|
580 |
vapier |
1.32 |
pathlen = strlen(path); |
581 |
vapier |
1.10 |
while ((dentry = readdir(dir))) { |
582 |
|
|
if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) |
583 |
|
|
continue; |
584 |
vapier |
1.32 |
len = (pathlen + 1 + strlen(dentry->d_name) + 1); |
585 |
|
|
if (len >= sizeof(buf)) { |
586 |
|
|
warnf("Skipping '%s': len > sizeof(buf); %d > %d\n", path, (int)len, (int)sizeof(buf)); |
587 |
|
|
continue; |
588 |
|
|
} |
589 |
solar |
1.31 |
sprintf(buf, "%s/%s", path, dentry->d_name); |
590 |
solar |
1.20 |
if (lstat(buf, &st) != -1) { |
591 |
vapier |
1.10 |
if (S_ISREG(st.st_mode)) |
592 |
solar |
1.20 |
scanelf_file(buf); |
593 |
vapier |
1.10 |
else if (dir_recurse && S_ISDIR(st.st_mode)) { |
594 |
vapier |
1.14 |
if (dir_crossmount || (st_top.st_dev == st.st_dev)) |
595 |
solar |
1.20 |
scanelf_dir(buf); |
596 |
vapier |
1.10 |
} |
597 |
|
|
} |
598 |
|
|
} |
599 |
|
|
closedir(dir); |
600 |
solar |
1.1 |
} |
601 |
|
|
|
602 |
vapier |
1.47 |
static int scanelf_from_file(char *filename) |
603 |
|
|
{ |
604 |
solar |
1.45 |
FILE *fp = NULL; |
605 |
|
|
char *p; |
606 |
|
|
char path[_POSIX_PATH_MAX]; |
607 |
|
|
|
608 |
|
|
if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) |
609 |
|
|
fp = stdin; |
610 |
|
|
else if ((fp = fopen(filename, "r")) == NULL) |
611 |
|
|
return 1; |
612 |
|
|
|
613 |
|
|
while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { |
614 |
|
|
if ((p = strchr(path, '\n')) != NULL) |
615 |
|
|
*p = 0; |
616 |
|
|
scanelf_dir(path); |
617 |
|
|
} |
618 |
|
|
if (fp != stdin) |
619 |
|
|
fclose(fp); |
620 |
|
|
return 0; |
621 |
|
|
} |
622 |
|
|
|
623 |
vapier |
1.48 |
static void load_ld_so_conf() |
624 |
|
|
{ |
625 |
|
|
FILE *fp = NULL; |
626 |
|
|
char *p; |
627 |
|
|
char path[_POSIX_PATH_MAX]; |
628 |
|
|
int i = 0; |
629 |
|
|
|
630 |
|
|
if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) |
631 |
|
|
return; |
632 |
|
|
|
633 |
|
|
while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { |
634 |
|
|
if (*path != '/') |
635 |
|
|
continue; |
636 |
|
|
|
637 |
|
|
if ((p = strrchr(path, '\r')) != NULL) |
638 |
|
|
*p = 0; |
639 |
|
|
if ((p = strchr(path, '\n')) != NULL) |
640 |
|
|
*p = 0; |
641 |
|
|
|
642 |
|
|
ldpaths[i++] = xstrdup(path); |
643 |
|
|
|
644 |
|
|
if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) |
645 |
|
|
break; |
646 |
|
|
} |
647 |
|
|
ldpaths[i] = NULL; |
648 |
|
|
|
649 |
|
|
fclose(fp); |
650 |
|
|
} |
651 |
|
|
|
652 |
vapier |
1.10 |
/* scan /etc/ld.so.conf for paths */ |
653 |
|
|
static void scanelf_ldpath() |
654 |
|
|
{ |
655 |
vapier |
1.17 |
char scan_l, scan_ul, scan_ull; |
656 |
vapier |
1.48 |
int i = 0; |
657 |
vapier |
1.10 |
|
658 |
vapier |
1.48 |
if (!ldpaths[0]) |
659 |
|
|
err("Unable to load any paths from ld.so.conf"); |
660 |
vapier |
1.10 |
|
661 |
vapier |
1.17 |
scan_l = scan_ul = scan_ull = 0; |
662 |
|
|
|
663 |
vapier |
1.48 |
while (ldpaths[i]) { |
664 |
|
|
if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; |
665 |
|
|
if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; |
666 |
|
|
if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; |
667 |
|
|
scanelf_dir(ldpaths[i]); |
668 |
|
|
++i; |
669 |
|
|
} |
670 |
vapier |
1.10 |
|
671 |
vapier |
1.17 |
if (!scan_l) scanelf_dir("/lib"); |
672 |
|
|
if (!scan_ul) scanelf_dir("/usr/lib"); |
673 |
|
|
if (!scan_ull) scanelf_dir("/usr/local/lib"); |
674 |
vapier |
1.10 |
} |
675 |
solar |
1.1 |
|
676 |
vapier |
1.10 |
/* scan env PATH for paths */ |
677 |
|
|
static void scanelf_envpath() |
678 |
solar |
1.1 |
{ |
679 |
solar |
1.34 |
char *path, *p; |
680 |
vapier |
1.10 |
|
681 |
|
|
path = getenv("PATH"); |
682 |
|
|
if (!path) |
683 |
|
|
err("PATH is not set in your env !"); |
684 |
vapier |
1.41 |
path = xstrdup(path); |
685 |
vapier |
1.10 |
|
686 |
|
|
while ((p = strrchr(path, ':')) != NULL) { |
687 |
|
|
scanelf_dir(p + 1); |
688 |
|
|
*p = 0; |
689 |
|
|
} |
690 |
vapier |
1.17 |
|
691 |
solar |
1.34 |
free(path); |
692 |
solar |
1.1 |
} |
693 |
|
|
|
694 |
|
|
|
695 |
vapier |
1.10 |
|
696 |
|
|
/* usage / invocation handling functions */ |
697 |
vapier |
1.49 |
#define PARSE_FLAGS "plRmyxetrnibs:aqvF:f:o:BhV" |
698 |
vapier |
1.27 |
#define a_argument required_argument |
699 |
vapier |
1.10 |
static struct option const long_opts[] = { |
700 |
|
|
{"path", no_argument, NULL, 'p'}, |
701 |
|
|
{"ldpath", no_argument, NULL, 'l'}, |
702 |
|
|
{"recursive", no_argument, NULL, 'R'}, |
703 |
vapier |
1.14 |
{"mount", no_argument, NULL, 'm'}, |
704 |
vapier |
1.37 |
{"symlink", no_argument, NULL, 'y'}, |
705 |
vapier |
1.10 |
{"pax", no_argument, NULL, 'x'}, |
706 |
solar |
1.16 |
{"header", no_argument, NULL, 'e'}, |
707 |
vapier |
1.10 |
{"textrel", no_argument, NULL, 't'}, |
708 |
|
|
{"rpath", no_argument, NULL, 'r'}, |
709 |
vapier |
1.32 |
{"needed", no_argument, NULL, 'n'}, |
710 |
vapier |
1.38 |
{"interp", no_argument, NULL, 'i'}, |
711 |
vapier |
1.49 |
{"bind", no_argument, NULL, 'b'}, |
712 |
vapier |
1.27 |
{"symbol", a_argument, NULL, 's'}, |
713 |
vapier |
1.10 |
{"all", no_argument, NULL, 'a'}, |
714 |
|
|
{"quiet", no_argument, NULL, 'q'}, |
715 |
vapier |
1.14 |
{"verbose", no_argument, NULL, 'v'}, |
716 |
vapier |
1.39 |
{"format", a_argument, NULL, 'F'}, |
717 |
solar |
1.45 |
{"from", a_argument, NULL, 'f'}, |
718 |
vapier |
1.27 |
{"file", a_argument, NULL, 'o'}, |
719 |
solar |
1.16 |
{"nobanner", no_argument, NULL, 'B'}, |
720 |
vapier |
1.10 |
{"help", no_argument, NULL, 'h'}, |
721 |
|
|
{"version", no_argument, NULL, 'V'}, |
722 |
|
|
{NULL, no_argument, NULL, 0x0} |
723 |
|
|
}; |
724 |
solar |
1.57 |
|
725 |
vapier |
1.10 |
static char *opts_help[] = { |
726 |
|
|
"Scan all directories in PATH environment", |
727 |
|
|
"Scan all directories in /etc/ld.so.conf", |
728 |
vapier |
1.14 |
"Scan directories recursively", |
729 |
vapier |
1.37 |
"Don't recursively cross mount points", |
730 |
|
|
"Don't scan symlinks\n", |
731 |
vapier |
1.10 |
"Print PaX markings", |
732 |
|
|
"Print GNU_STACK markings", |
733 |
|
|
"Print TEXTREL information", |
734 |
|
|
"Print RPATH information", |
735 |
vapier |
1.32 |
"Print NEEDED information", |
736 |
vapier |
1.38 |
"Print INTERP information", |
737 |
vapier |
1.49 |
"Print BIND information", |
738 |
vapier |
1.27 |
"Find a specified symbol", |
739 |
solar |
1.57 |
"Print all scanned info (-x -e -t -r -n -i -b)\n", |
740 |
vapier |
1.14 |
"Only output 'bad' things", |
741 |
|
|
"Be verbose (can be specified more than once)", |
742 |
vapier |
1.39 |
"Use specified format for output", |
743 |
solar |
1.45 |
"Read input stream from a filename", |
744 |
vapier |
1.24 |
"Write output stream to a filename", |
745 |
vapier |
1.14 |
"Don't display the header", |
746 |
vapier |
1.10 |
"Print this help and exit", |
747 |
|
|
"Print version and exit", |
748 |
|
|
NULL |
749 |
|
|
}; |
750 |
|
|
|
751 |
|
|
/* display usage and exit */ |
752 |
|
|
static void usage(int status) |
753 |
solar |
1.1 |
{ |
754 |
vapier |
1.44 |
unsigned long i; |
755 |
solar |
1.52 |
printf("* Scan ELF binaries for stuff\n\n" |
756 |
solar |
1.35 |
"Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); |
757 |
|
|
printf("Options: -[%s]\n", PARSE_FLAGS); |
758 |
vapier |
1.10 |
for (i = 0; long_opts[i].name; ++i) |
759 |
vapier |
1.27 |
if (long_opts[i].has_arg == no_argument) |
760 |
solar |
1.52 |
printf(" -%c, --%-13s* %s\n", long_opts[i].val, |
761 |
vapier |
1.27 |
long_opts[i].name, opts_help[i]); |
762 |
|
|
else |
763 |
solar |
1.52 |
printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val, |
764 |
vapier |
1.27 |
long_opts[i].name, opts_help[i]); |
765 |
solar |
1.45 |
|
766 |
|
|
if (status != EXIT_SUCCESS) |
767 |
|
|
exit(status); |
768 |
|
|
|
769 |
vapier |
1.46 |
puts("\nThe format modifiers for the -F option are:"); |
770 |
|
|
puts(" %F Filename \t%x PaX Flags \t%e STACK/RELRO"); |
771 |
|
|
puts(" %t TEXTREL \t%r RPATH \t%n NEEDED"); |
772 |
vapier |
1.49 |
puts(" %i INTERP \t%b BIND \t%s symbol"); |
773 |
solar |
1.45 |
|
774 |
vapier |
1.10 |
exit(status); |
775 |
solar |
1.1 |
} |
776 |
|
|
|
777 |
|
|
/* parse command line arguments and preform needed actions */ |
778 |
vapier |
1.10 |
static void parseargs(int argc, char *argv[]) |
779 |
|
|
{ |
780 |
vapier |
1.48 |
int i; |
781 |
solar |
1.45 |
char *from_file = NULL; |
782 |
vapier |
1.10 |
|
783 |
|
|
opterr = 0; |
784 |
vapier |
1.48 |
while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { |
785 |
|
|
switch (i) { |
786 |
vapier |
1.10 |
|
787 |
vapier |
1.39 |
case 'V': |
788 |
solar |
1.19 |
printf("%s compiled %s\n%s\n" |
789 |
|
|
"%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", |
790 |
|
|
__FILE__, __DATE__, rcsid, argv0); |
791 |
vapier |
1.10 |
exit(EXIT_SUCCESS); |
792 |
|
|
break; |
793 |
|
|
case 'h': usage(EXIT_SUCCESS); break; |
794 |
solar |
1.45 |
case 'f': |
795 |
|
|
if (from_file == NULL) |
796 |
|
|
from_file = xstrdup(optarg); |
797 |
|
|
break; |
798 |
vapier |
1.24 |
case 'o': { |
799 |
solar |
1.21 |
FILE *fp = NULL; |
800 |
|
|
fp = freopen(optarg, "w", stdout); |
801 |
vapier |
1.24 |
if (fp == NULL) |
802 |
|
|
err("Could not open output stream '%s': %s", optarg, strerror(errno)); |
803 |
|
|
stdout = fp; |
804 |
solar |
1.21 |
break; |
805 |
|
|
} |
806 |
vapier |
1.24 |
|
807 |
vapier |
1.39 |
case 's': { |
808 |
|
|
size_t len; |
809 |
vapier |
1.41 |
find_sym = xstrdup(optarg); |
810 |
vapier |
1.39 |
len = strlen(find_sym) + 1; |
811 |
vapier |
1.41 |
versioned_symname = (char*)xmalloc(sizeof(char) * (len+1)); |
812 |
vapier |
1.39 |
sprintf(versioned_symname, "%s@", find_sym); |
813 |
|
|
break; |
814 |
|
|
} |
815 |
|
|
|
816 |
|
|
case 'F': { |
817 |
solar |
1.61 |
if (!out_format) |
818 |
|
|
out_format = xstrdup(optarg); |
819 |
vapier |
1.39 |
break; |
820 |
|
|
} |
821 |
vapier |
1.27 |
|
822 |
vapier |
1.37 |
case 'y': scan_symlink = 0; break; |
823 |
solar |
1.16 |
case 'B': show_banner = 0; break; |
824 |
vapier |
1.10 |
case 'l': scan_ldpath = 1; break; |
825 |
|
|
case 'p': scan_envpath = 1; break; |
826 |
|
|
case 'R': dir_recurse = 1; break; |
827 |
vapier |
1.14 |
case 'm': dir_crossmount = 0; break; |
828 |
vapier |
1.10 |
case 'x': show_pax = 1; break; |
829 |
solar |
1.16 |
case 'e': show_stack = 1; break; |
830 |
vapier |
1.10 |
case 't': show_textrel = 1; break; |
831 |
|
|
case 'r': show_rpath = 1; break; |
832 |
vapier |
1.32 |
case 'n': show_needed = 1; break; |
833 |
vapier |
1.38 |
case 'i': show_interp = 1; break; |
834 |
vapier |
1.49 |
case 'b': show_bind = 1; break; |
835 |
vapier |
1.10 |
case 'q': be_quiet = 1; break; |
836 |
vapier |
1.14 |
case 'v': be_verbose = (be_verbose % 20) + 1; break; |
837 |
vapier |
1.50 |
case 'a': show_pax = show_stack = show_textrel = show_rpath = \ |
838 |
|
|
show_needed = show_interp = show_bind = 1; break; |
839 |
vapier |
1.10 |
|
840 |
|
|
case ':': |
841 |
vapier |
1.49 |
err("Option missing parameter\n"); |
842 |
vapier |
1.10 |
case '?': |
843 |
vapier |
1.49 |
err("Unknown option\n"); |
844 |
vapier |
1.10 |
default: |
845 |
vapier |
1.48 |
err("Unhandled option '%c'", i); |
846 |
vapier |
1.10 |
} |
847 |
|
|
} |
848 |
|
|
|
849 |
vapier |
1.39 |
/* let the format option override all other options */ |
850 |
|
|
if (out_format) { |
851 |
vapier |
1.58 |
show_pax = show_stack = show_textrel = show_rpath = \ |
852 |
|
|
show_needed = show_interp = show_bind = 0; |
853 |
vapier |
1.48 |
for (i = 0; out_format[i]; ++i) { |
854 |
|
|
if (out_format[i] != '%') continue; |
855 |
vapier |
1.39 |
|
856 |
vapier |
1.48 |
switch (out_format[++i]) { |
857 |
vapier |
1.39 |
case '%': break; |
858 |
|
|
case 'F': break; |
859 |
|
|
case 's': break; |
860 |
vapier |
1.41 |
case 'o': break; |
861 |
vapier |
1.39 |
case 'x': show_pax = 1; break; |
862 |
|
|
case 'e': show_stack = 1; break; |
863 |
|
|
case 't': show_textrel = 1; break; |
864 |
|
|
case 'r': show_rpath = 1; break; |
865 |
|
|
case 'n': show_needed = 1; break; |
866 |
|
|
case 'i': show_interp = 1; break; |
867 |
vapier |
1.49 |
case 'b': show_bind = 1; break; |
868 |
vapier |
1.39 |
default: |
869 |
|
|
err("Invalid format specifier '%c' (byte %i)", |
870 |
vapier |
1.48 |
out_format[i], i+1); |
871 |
vapier |
1.39 |
} |
872 |
|
|
} |
873 |
vapier |
1.41 |
|
874 |
|
|
/* construct our default format */ |
875 |
|
|
} else { |
876 |
|
|
size_t fmt_len = 30; |
877 |
|
|
out_format = (char*)xmalloc(sizeof(char) * fmt_len); |
878 |
|
|
if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); |
879 |
|
|
if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); |
880 |
|
|
if (show_stack) xstrcat(&out_format, "%e ", &fmt_len); |
881 |
|
|
if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); |
882 |
|
|
if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); |
883 |
|
|
if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); |
884 |
|
|
if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); |
885 |
vapier |
1.49 |
if (show_bind) xstrcat(&out_format, "%b ", &fmt_len); |
886 |
vapier |
1.41 |
if (find_sym) xstrcat(&out_format, "%s ", &fmt_len); |
887 |
|
|
if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); |
888 |
vapier |
1.39 |
} |
889 |
vapier |
1.41 |
if (be_verbose > 2) printf("Format: %s\n", out_format); |
890 |
vapier |
1.39 |
|
891 |
|
|
/* now lets actually do the scanning */ |
892 |
vapier |
1.48 |
if (scan_ldpath || (show_rpath && be_quiet)) |
893 |
|
|
load_ld_so_conf(); |
894 |
vapier |
1.10 |
if (scan_ldpath) scanelf_ldpath(); |
895 |
|
|
if (scan_envpath) scanelf_envpath(); |
896 |
solar |
1.45 |
if (from_file) { |
897 |
|
|
scanelf_from_file(from_file); |
898 |
|
|
free(from_file); |
899 |
|
|
from_file = *argv; |
900 |
|
|
} |
901 |
|
|
if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) |
902 |
vapier |
1.25 |
err("Nothing to scan !?"); |
903 |
vapier |
1.10 |
while (optind < argc) |
904 |
|
|
scanelf_dir(argv[optind++]); |
905 |
vapier |
1.27 |
|
906 |
vapier |
1.39 |
/* clean up */ |
907 |
|
|
if (find_sym) { |
908 |
|
|
free(find_sym); |
909 |
|
|
free(versioned_symname); |
910 |
|
|
} |
911 |
|
|
if (out_format) free(out_format); |
912 |
vapier |
1.48 |
for (i = 0; ldpaths[i]; ++i) |
913 |
|
|
free(ldpaths[i]); |
914 |
vapier |
1.10 |
} |
915 |
|
|
|
916 |
|
|
|
917 |
|
|
|
918 |
vapier |
1.41 |
/* utility funcs */ |
919 |
vapier |
1.60 |
static char *xstrdup(const char *s) |
920 |
vapier |
1.41 |
{ |
921 |
|
|
char *ret = strdup(s); |
922 |
|
|
if (!ret) err("Could not strdup(): %s", strerror(errno)); |
923 |
|
|
return ret; |
924 |
|
|
} |
925 |
solar |
1.57 |
|
926 |
vapier |
1.41 |
static void *xmalloc(size_t size) |
927 |
|
|
{ |
928 |
|
|
void *ret = malloc(size); |
929 |
|
|
if (!ret) err("Could not malloc() %li bytes", (unsigned long)size); |
930 |
|
|
return ret; |
931 |
|
|
} |
932 |
solar |
1.57 |
|
933 |
vapier |
1.41 |
static void xstrcat(char **dst, const char *src, size_t *curr_len) |
934 |
|
|
{ |
935 |
|
|
long new_len; |
936 |
|
|
|
937 |
|
|
new_len = strlen(*dst) + strlen(src); |
938 |
|
|
if (*curr_len <= new_len) { |
939 |
|
|
*curr_len = new_len + (*curr_len / 2); |
940 |
|
|
*dst = realloc(*dst, *curr_len); |
941 |
|
|
if (!*dst) |
942 |
|
|
err("could not realloc %li bytes", (unsigned long)*curr_len); |
943 |
|
|
} |
944 |
|
|
|
945 |
|
|
strcat(*dst, src); |
946 |
|
|
} |
947 |
solar |
1.57 |
|
948 |
vapier |
1.41 |
static inline void xchrcat(char **dst, const char append, size_t *curr_len) |
949 |
|
|
{ |
950 |
|
|
static char my_app[2]; |
951 |
|
|
my_app[0] = append; |
952 |
|
|
my_app[1] = '\0'; |
953 |
|
|
xstrcat(dst, my_app, curr_len); |
954 |
|
|
} |
955 |
|
|
|
956 |
|
|
|
957 |
vapier |
1.10 |
int main(int argc, char *argv[]) |
958 |
solar |
1.1 |
{ |
959 |
vapier |
1.10 |
if (argc < 2) |
960 |
|
|
usage(EXIT_FAILURE); |
961 |
|
|
parseargs(argc, argv); |
962 |
solar |
1.21 |
fclose(stdout); |
963 |
solar |
1.61 |
#ifdef __BOUNDS_CHECKING_ON |
964 |
|
|
warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()"); |
965 |
|
|
#endif |
966 |
vapier |
1.10 |
return EXIT_SUCCESS; |
967 |
solar |
1.1 |
} |