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 |
vapier |
1.94 |
* $Header: /var/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.93 2005/12/10 04:07:55 vapier Exp $ |
5 |
solar |
1.1 |
* |
6 |
vapier |
1.87 |
* Copyright 2003-2005 Ned Ludd - <solar@gentoo.org> |
7 |
|
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* Copyright 2004-2005 Mike Frysinger - <vapier@gentoo.org> |
8 |
solar |
1.1 |
*/ |
9 |
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10 |
|
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#include <stdio.h> |
11 |
|
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#include <stdlib.h> |
12 |
|
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#include <sys/types.h> |
13 |
vapier |
1.60 |
#include <libgen.h> |
14 |
|
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#include <limits.h> |
15 |
solar |
1.1 |
#include <string.h> |
16 |
vapier |
1.10 |
#include <errno.h> |
17 |
solar |
1.1 |
#include <unistd.h> |
18 |
|
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#include <sys/stat.h> |
19 |
|
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#include <dirent.h> |
20 |
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#include <getopt.h> |
21 |
solar |
1.20 |
#include <assert.h> |
22 |
vapier |
1.89 |
#include "paxinc.h" |
23 |
solar |
1.1 |
|
24 |
vapier |
1.94 |
static const char *rcsid = "$Id: scanelf.c,v 1.93 2005/12/10 04:07:55 vapier Exp $"; |
25 |
vapier |
1.36 |
#define argv0 "scanelf" |
26 |
vapier |
1.10 |
|
27 |
vapier |
1.70 |
#define IS_MODIFIER(c) (c == '%' || c == '#') |
28 |
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29 |
vapier |
1.10 |
|
30 |
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31 |
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/* prototypes */ |
32 |
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static void scanelf_file(const char *filename); |
33 |
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static void scanelf_dir(const char *path); |
34 |
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static void scanelf_ldpath(); |
35 |
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static void scanelf_envpath(); |
36 |
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static void usage(int status); |
37 |
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static void parseargs(int argc, char *argv[]); |
38 |
vapier |
1.60 |
static char *xstrdup(const char *s); |
39 |
vapier |
1.41 |
static void *xmalloc(size_t size); |
40 |
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static void xstrcat(char **dst, const char *src, size_t *curr_len); |
41 |
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static inline void xchrcat(char **dst, const char append, size_t *curr_len); |
42 |
vapier |
1.10 |
|
43 |
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/* variables to control behavior */ |
44 |
vapier |
1.48 |
static char *ldpaths[256]; |
45 |
vapier |
1.10 |
static char scan_ldpath = 0; |
46 |
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static char scan_envpath = 0; |
47 |
vapier |
1.37 |
static char scan_symlink = 1; |
48 |
vapier |
1.10 |
static char dir_recurse = 0; |
49 |
vapier |
1.14 |
static char dir_crossmount = 1; |
50 |
vapier |
1.10 |
static char show_pax = 0; |
51 |
solar |
1.73 |
static char show_phdr = 0; |
52 |
vapier |
1.10 |
static char show_textrel = 0; |
53 |
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static char show_rpath = 0; |
54 |
vapier |
1.32 |
static char show_needed = 0; |
55 |
vapier |
1.38 |
static char show_interp = 0; |
56 |
vapier |
1.49 |
static char show_bind = 0; |
57 |
vapier |
1.84 |
static char show_soname = 0; |
58 |
vapier |
1.76 |
static char show_textrels = 0; |
59 |
solar |
1.16 |
static char show_banner = 1; |
60 |
vapier |
1.10 |
static char be_quiet = 0; |
61 |
vapier |
1.14 |
static char be_verbose = 0; |
62 |
vapier |
1.70 |
static char be_wewy_wewy_quiet = 0; |
63 |
vapier |
1.39 |
static char *find_sym = NULL, *versioned_symname = NULL; |
64 |
vapier |
1.72 |
static char *find_lib = NULL; |
65 |
vapier |
1.39 |
static char *out_format = NULL; |
66 |
vapier |
1.66 |
static char *search_path = NULL; |
67 |
solar |
1.86 |
static char gmatch = 0; |
68 |
solar |
1.1 |
|
69 |
vapier |
1.70 |
|
70 |
vapier |
1.39 |
/* sub-funcs for scanelf_file() */ |
71 |
vapier |
1.77 |
static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) |
72 |
|
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{ |
73 |
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/* find the best SHT_DYNSYM and SHT_STRTAB sections */ |
74 |
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#define GET_SYMTABS(B) \ |
75 |
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if (elf->elf_class == ELFCLASS ## B) { \ |
76 |
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Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \ |
77 |
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/* debug sections */ \ |
78 |
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symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \ |
79 |
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strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \ |
80 |
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/* runtime sections */ \ |
81 |
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dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \ |
82 |
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dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \ |
83 |
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if (symtab && dynsym) { \ |
84 |
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*sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \ |
85 |
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} else { \ |
86 |
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*sym = (void*)(symtab ? symtab : dynsym); \ |
87 |
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} \ |
88 |
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if (strtab && dynstr) { \ |
89 |
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*tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \ |
90 |
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} else { \ |
91 |
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*tab = (void*)(strtab ? strtab : dynstr); \ |
92 |
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} \ |
93 |
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} |
94 |
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GET_SYMTABS(32) |
95 |
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GET_SYMTABS(64) |
96 |
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} |
97 |
vapier |
1.41 |
static char *scanelf_file_pax(elfobj *elf, char *found_pax) |
98 |
solar |
1.6 |
{ |
99 |
solar |
1.61 |
static char ret[7]; |
100 |
|
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unsigned long i, shown; |
101 |
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|
102 |
vapier |
1.41 |
if (!show_pax) return NULL; |
103 |
vapier |
1.10 |
|
104 |
solar |
1.61 |
shown = 0; |
105 |
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memset(&ret, 0, sizeof(ret)); |
106 |
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107 |
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if (elf->phdr) { |
108 |
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#define SHOW_PAX(B) \ |
109 |
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if (elf->elf_class == ELFCLASS ## B) { \ |
110 |
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Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
111 |
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Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
112 |
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for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
113 |
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if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \ |
114 |
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continue; \ |
115 |
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if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \ |
116 |
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continue; \ |
117 |
|
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memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \ |
118 |
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*found_pax = 1; \ |
119 |
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++shown; \ |
120 |
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break; \ |
121 |
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} \ |
122 |
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} |
123 |
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SHOW_PAX(32) |
124 |
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SHOW_PAX(64) |
125 |
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} |
126 |
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|
127 |
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/* fall back to EI_PAX if no PT_PAX was found */ |
128 |
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if (!*ret) { |
129 |
vapier |
1.90 |
static char *paxflags; |
130 |
solar |
1.61 |
paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); |
131 |
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if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) { |
132 |
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*found_pax = 1; |
133 |
vapier |
1.90 |
return (be_wewy_wewy_quiet ? NULL : paxflags); |
134 |
solar |
1.61 |
} |
135 |
|
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strncpy(ret, paxflags, sizeof(ret)); |
136 |
vapier |
1.14 |
} |
137 |
vapier |
1.41 |
|
138 |
vapier |
1.90 |
if (be_wewy_wewy_quiet || (be_quiet && !shown)) |
139 |
solar |
1.61 |
return NULL; |
140 |
vapier |
1.90 |
else |
141 |
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return ret; |
142 |
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} |
143 |
solar |
1.61 |
|
144 |
solar |
1.73 |
static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load) |
145 |
vapier |
1.39 |
{ |
146 |
vapier |
1.71 |
static char ret[12]; |
147 |
vapier |
1.41 |
char *found; |
148 |
vapier |
1.91 |
unsigned long i, shown; |
149 |
vapier |
1.71 |
unsigned char multi_stack, multi_relro, multi_load; |
150 |
vapier |
1.41 |
|
151 |
solar |
1.73 |
if (!show_phdr) return NULL; |
152 |
vapier |
1.41 |
|
153 |
vapier |
1.71 |
memcpy(ret, "--- --- ---\0", 12); |
154 |
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|
155 |
vapier |
1.41 |
shown = 0; |
156 |
vapier |
1.71 |
multi_stack = multi_relro = multi_load = 0; |
157 |
vapier |
1.44 |
|
158 |
solar |
1.73 |
#define SHOW_PHDR(B) \ |
159 |
vapier |
1.39 |
if (elf->elf_class == ELFCLASS ## B) { \ |
160 |
|
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Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
161 |
vapier |
1.91 |
Elf ## B ## _Off offset; \ |
162 |
|
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uint32_t flags, check_flags; \ |
163 |
|
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if (elf->phdr != NULL) { \ |
164 |
|
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Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
165 |
|
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for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \ |
166 |
|
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if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ |
167 |
|
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if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ |
168 |
|
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found = found_phdr; \ |
169 |
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offset = 0; \ |
170 |
|
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check_flags = PF_X; \ |
171 |
|
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} else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \ |
172 |
|
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if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ |
173 |
|
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found = found_relro; \ |
174 |
|
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offset = 4; \ |
175 |
|
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check_flags = PF_X; \ |
176 |
|
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} else if (EGET(phdr[i].p_type) == PT_LOAD) { \ |
177 |
|
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if (multi_load++ > 2) warnf("%s: more than 2 PT_LOAD's !?", elf->filename); \ |
178 |
|
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found = found_load; \ |
179 |
|
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offset = 8; \ |
180 |
|
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check_flags = PF_W|PF_X; \ |
181 |
|
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} else \ |
182 |
|
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continue; \ |
183 |
|
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flags = EGET(phdr[i].p_flags); \ |
184 |
|
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if (be_quiet && ((flags & check_flags) != check_flags)) \ |
185 |
|
|
continue; \ |
186 |
|
|
memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \ |
187 |
|
|
*found = 1; \ |
188 |
|
|
++shown; \ |
189 |
|
|
} \ |
190 |
|
|
} else if (elf->shdr != NULL) { \ |
191 |
|
|
/* no program headers which means this is prob an object file */ \ |
192 |
|
|
Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ |
193 |
|
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Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \ |
194 |
|
|
check_flags = SHF_WRITE|SHF_EXECINSTR; \ |
195 |
|
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for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \ |
196 |
|
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if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \ |
197 |
|
|
offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \ |
198 |
|
|
if (!strcmp((char*)(elf->data + offset), ".note.GNU-stack")) { \ |
199 |
|
|
if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \ |
200 |
|
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flags = EGET(shdr[i].sh_flags); \ |
201 |
|
|
if (be_quiet && ((flags & check_flags) != check_flags)) \ |
202 |
|
|
continue; \ |
203 |
|
|
++*found_phdr; \ |
204 |
|
|
shown = 1; \ |
205 |
|
|
if (flags & SHF_WRITE) ret[0] = 'W'; \ |
206 |
|
|
if (flags & SHF_ALLOC) ret[1] = 'A'; \ |
207 |
|
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if (flags & SHF_EXECINSTR) ret[2] = 'X'; \ |
208 |
|
|
if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \ |
209 |
|
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break; \ |
210 |
|
|
} \ |
211 |
|
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} \ |
212 |
|
|
if (!multi_stack) { \ |
213 |
|
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*found_phdr = 1; \ |
214 |
|
|
shown = 1; \ |
215 |
|
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memcpy(ret, "!WX", 3); \ |
216 |
|
|
} \ |
217 |
vapier |
1.39 |
} \ |
218 |
|
|
} |
219 |
solar |
1.73 |
SHOW_PHDR(32) |
220 |
|
|
SHOW_PHDR(64) |
221 |
vapier |
1.44 |
|
222 |
vapier |
1.90 |
if (be_wewy_wewy_quiet || (be_quiet && !shown)) |
223 |
vapier |
1.41 |
return NULL; |
224 |
|
|
else |
225 |
|
|
return ret; |
226 |
vapier |
1.39 |
} |
227 |
vapier |
1.90 |
static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) |
228 |
vapier |
1.39 |
{ |
229 |
vapier |
1.90 |
static const char *ret = "TEXTREL"; |
230 |
vapier |
1.44 |
unsigned long i; |
231 |
vapier |
1.41 |
|
232 |
vapier |
1.79 |
if (!show_textrel && !show_textrels) return NULL; |
233 |
vapier |
1.41 |
|
234 |
vapier |
1.44 |
if (elf->phdr) { |
235 |
vapier |
1.39 |
#define SHOW_TEXTREL(B) \ |
236 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
237 |
|
|
Elf ## B ## _Dyn *dyn; \ |
238 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
239 |
|
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Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
240 |
vapier |
1.44 |
Elf ## B ## _Off offset; \ |
241 |
vapier |
1.39 |
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
242 |
vapier |
1.59 |
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
243 |
vapier |
1.44 |
offset = EGET(phdr[i].p_offset); \ |
244 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
245 |
|
|
dyn = DYN ## B (elf->data + offset); \ |
246 |
vapier |
1.39 |
while (EGET(dyn->d_tag) != DT_NULL) { \ |
247 |
|
|
if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ |
248 |
|
|
*found_textrel = 1; \ |
249 |
|
|
/*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ |
250 |
vapier |
1.70 |
return (be_wewy_wewy_quiet ? NULL : ret); \ |
251 |
vapier |
1.39 |
} \ |
252 |
|
|
++dyn; \ |
253 |
vapier |
1.26 |
} \ |
254 |
vapier |
1.39 |
} } |
255 |
|
|
SHOW_TEXTREL(32) |
256 |
|
|
SHOW_TEXTREL(64) |
257 |
vapier |
1.44 |
} |
258 |
|
|
|
259 |
vapier |
1.70 |
if (be_quiet || be_wewy_wewy_quiet) |
260 |
vapier |
1.41 |
return NULL; |
261 |
|
|
else |
262 |
vapier |
1.90 |
return " - "; |
263 |
vapier |
1.39 |
} |
264 |
vapier |
1.79 |
static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) |
265 |
vapier |
1.76 |
{ |
266 |
vapier |
1.82 |
unsigned long s, r, rmax; |
267 |
|
|
void *symtab_void, *strtab_void, *text_void; |
268 |
vapier |
1.76 |
|
269 |
|
|
if (!show_textrels) return NULL; |
270 |
|
|
|
271 |
vapier |
1.79 |
/* don't search for TEXTREL's if the ELF doesn't have any */ |
272 |
|
|
if (!*found_textrel) scanelf_file_textrel(elf, found_textrel); |
273 |
|
|
if (!*found_textrel) return NULL; |
274 |
|
|
|
275 |
vapier |
1.77 |
scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); |
276 |
vapier |
1.82 |
text_void = elf_findsecbyname(elf, ".text"); |
277 |
vapier |
1.76 |
|
278 |
vapier |
1.82 |
if (symtab_void && strtab_void && text_void && elf->shdr) { |
279 |
vapier |
1.76 |
#define SHOW_TEXTRELS(B) \ |
280 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
281 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
282 |
|
|
Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \ |
283 |
|
|
Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ |
284 |
|
|
Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ |
285 |
vapier |
1.82 |
Elf ## B ## _Shdr *text = SHDR ## B (text_void); \ |
286 |
|
|
Elf ## B ## _Addr vaddr = EGET(text->sh_addr); \ |
287 |
|
|
uint ## B ## _t memsz = EGET(text->sh_size); \ |
288 |
vapier |
1.76 |
Elf ## B ## _Rel *rel; \ |
289 |
|
|
Elf ## B ## _Rela *rela; \ |
290 |
|
|
/* search the section headers for relocations */ \ |
291 |
|
|
for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \ |
292 |
|
|
uint32_t sh_type = EGET(shdr[s].sh_type); \ |
293 |
|
|
if (sh_type == SHT_REL) { \ |
294 |
|
|
rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \ |
295 |
|
|
rela = NULL; \ |
296 |
|
|
rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \ |
297 |
|
|
} else if (sh_type == SHT_RELA) { \ |
298 |
|
|
rel = NULL; \ |
299 |
|
|
rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \ |
300 |
|
|
rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \ |
301 |
|
|
} else \ |
302 |
|
|
continue; \ |
303 |
vapier |
1.82 |
/* now see if any of the relocs are in the .text */ \ |
304 |
|
|
for (r = 0; r < rmax; ++r) { \ |
305 |
|
|
unsigned long sym_max; \ |
306 |
|
|
Elf ## B ## _Addr offset_tmp; \ |
307 |
|
|
Elf ## B ## _Sym *func; \ |
308 |
|
|
Elf ## B ## _Sym *sym; \ |
309 |
|
|
Elf ## B ## _Addr r_offset; \ |
310 |
|
|
uint ## B ## _t r_info; \ |
311 |
|
|
if (sh_type == SHT_REL) { \ |
312 |
|
|
r_offset = EGET(rel[r].r_offset); \ |
313 |
|
|
r_info = EGET(rel[r].r_info); \ |
314 |
|
|
} else { \ |
315 |
|
|
r_offset = EGET(rela[r].r_offset); \ |
316 |
|
|
r_info = EGET(rela[r].r_info); \ |
317 |
|
|
} \ |
318 |
|
|
/* make sure this relocation is inside of the .text */ \ |
319 |
|
|
if (r_offset < vaddr || r_offset >= vaddr + memsz) { \ |
320 |
|
|
if (be_verbose <= 2) continue; \ |
321 |
|
|
} else \ |
322 |
vapier |
1.78 |
*found_textrels = 1; \ |
323 |
vapier |
1.82 |
/* locate this relocation symbol name */ \ |
324 |
|
|
sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ |
325 |
|
|
sym_max = ELF ## B ## _R_SYM(r_info); \ |
326 |
|
|
if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ |
327 |
|
|
sym += sym_max; \ |
328 |
|
|
else \ |
329 |
|
|
sym = NULL; \ |
330 |
|
|
sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ |
331 |
|
|
/* show the raw details about this reloc */ \ |
332 |
vapier |
1.88 |
printf(" %s: ", elf->base_filename); \ |
333 |
vapier |
1.82 |
if (sym && sym->st_name) \ |
334 |
|
|
printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \ |
335 |
|
|
else \ |
336 |
vapier |
1.88 |
printf("(memory/fake?)"); \ |
337 |
vapier |
1.82 |
printf(" [0x%lX]", (unsigned long)r_offset); \ |
338 |
|
|
/* now try to find the closest symbol that this rel is probably in */ \ |
339 |
|
|
sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ |
340 |
|
|
func = NULL; \ |
341 |
|
|
offset_tmp = 0; \ |
342 |
|
|
while (sym_max--) { \ |
343 |
|
|
if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \ |
344 |
|
|
func = sym; \ |
345 |
|
|
offset_tmp = EGET(sym->st_value); \ |
346 |
vapier |
1.76 |
} \ |
347 |
vapier |
1.82 |
++sym; \ |
348 |
vapier |
1.76 |
} \ |
349 |
vapier |
1.82 |
printf(" in "); \ |
350 |
|
|
if (func && func->st_name) \ |
351 |
|
|
printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \ |
352 |
|
|
else \ |
353 |
|
|
printf("(NULL: fake?)"); \ |
354 |
|
|
printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ |
355 |
vapier |
1.76 |
} \ |
356 |
|
|
} } |
357 |
|
|
SHOW_TEXTRELS(32) |
358 |
|
|
SHOW_TEXTRELS(64) |
359 |
|
|
} |
360 |
vapier |
1.82 |
if (!*found_textrels) |
361 |
|
|
warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename); |
362 |
vapier |
1.76 |
|
363 |
|
|
return NULL; |
364 |
|
|
} |
365 |
solar |
1.83 |
|
366 |
|
|
static void rpath_security_checks(elfobj *, char *); |
367 |
|
|
static void rpath_security_checks(elfobj *elf, char *item) { |
368 |
|
|
struct stat st; |
369 |
vapier |
1.84 |
switch (*item) { |
370 |
vapier |
1.89 |
case '/': break; |
371 |
|
|
case '.': |
372 |
|
|
warnf("Security problem with relative RPATH '%s' in %s", item, elf->filename); |
373 |
|
|
break; |
374 |
|
|
case '\0': |
375 |
solar |
1.83 |
warnf("Security problem NULL RPATH in %s", elf->filename); |
376 |
|
|
break; |
377 |
|
|
case '$': |
378 |
vapier |
1.84 |
if (fstat(elf->fd, &st) != -1) |
379 |
solar |
1.83 |
if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) |
380 |
|
|
warnf("Security problem with RPATH='%s' in %s with mode set of %o", |
381 |
|
|
item, elf->filename, st.st_mode & 07777); |
382 |
|
|
break; |
383 |
|
|
default: |
384 |
|
|
warnf("Maybe? sec problem with RPATH='%s' in %s", item, elf->filename); |
385 |
|
|
break; |
386 |
|
|
} |
387 |
|
|
} |
388 |
vapier |
1.41 |
static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) |
389 |
vapier |
1.39 |
{ |
390 |
vapier |
1.48 |
unsigned long i, s; |
391 |
|
|
char *rpath, *runpath, **r; |
392 |
vapier |
1.39 |
void *strtbl_void; |
393 |
vapier |
1.10 |
|
394 |
vapier |
1.39 |
if (!show_rpath) return; |
395 |
vapier |
1.10 |
|
396 |
vapier |
1.39 |
strtbl_void = elf_findsecbyname(elf, ".dynstr"); |
397 |
|
|
rpath = runpath = NULL; |
398 |
vapier |
1.10 |
|
399 |
vapier |
1.44 |
if (elf->phdr && strtbl_void) { |
400 |
vapier |
1.26 |
#define SHOW_RPATH(B) \ |
401 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
402 |
|
|
Elf ## B ## _Dyn *dyn; \ |
403 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
404 |
|
|
Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
405 |
|
|
Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ |
406 |
vapier |
1.44 |
Elf ## B ## _Off offset; \ |
407 |
vapier |
1.60 |
Elf ## B ## _Xword word; \ |
408 |
vapier |
1.48 |
/* Scan all the program headers */ \ |
409 |
vapier |
1.26 |
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
410 |
vapier |
1.48 |
/* Just scan dynamic headers */ \ |
411 |
vapier |
1.26 |
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
412 |
vapier |
1.44 |
offset = EGET(phdr[i].p_offset); \ |
413 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
414 |
vapier |
1.48 |
/* Just scan dynamic RPATH/RUNPATH headers */ \ |
415 |
vapier |
1.44 |
dyn = DYN ## B (elf->data + offset); \ |
416 |
vapier |
1.48 |
while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ |
417 |
|
|
if (word == DT_RPATH) { \ |
418 |
|
|
r = &rpath; \ |
419 |
|
|
} else if (word == DT_RUNPATH) { \ |
420 |
|
|
r = &runpath; \ |
421 |
|
|
} else { \ |
422 |
|
|
++dyn; \ |
423 |
|
|
continue; \ |
424 |
|
|
} \ |
425 |
|
|
/* Verify the memory is somewhat sane */ \ |
426 |
|
|
offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ |
427 |
vapier |
1.69 |
if (offset < (Elf ## B ## _Off)elf->len) { \ |
428 |
vapier |
1.48 |
if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ |
429 |
|
|
*r = (char*)(elf->data + offset); \ |
430 |
|
|
/* If quiet, don't output paths in ld.so.conf */ \ |
431 |
vapier |
1.69 |
if (be_quiet) { \ |
432 |
|
|
size_t len; \ |
433 |
|
|
char *start, *end; \ |
434 |
vapier |
1.75 |
/* note that we only 'chop' off leading known paths. */ \ |
435 |
|
|
/* since *r is read-only memory, we can only move the ptr forward. */ \ |
436 |
|
|
start = *r; \ |
437 |
|
|
/* scan each path in : delimited list */ \ |
438 |
|
|
while (start) { \ |
439 |
solar |
1.83 |
rpath_security_checks(elf, start); \ |
440 |
vapier |
1.69 |
end = strchr(start, ':'); \ |
441 |
vapier |
1.75 |
len = (end ? abs(end - start) : strlen(start)); \ |
442 |
|
|
for (s = 0; ldpaths[s]; ++s) { \ |
443 |
vapier |
1.69 |
if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ |
444 |
|
|
*r = (end ? end + 1 : NULL); \ |
445 |
|
|
break; \ |
446 |
|
|
} \ |
447 |
vapier |
1.48 |
} \ |
448 |
vapier |
1.75 |
if (!*r || !ldpaths[s] || !end) \ |
449 |
|
|
start = NULL; \ |
450 |
|
|
else \ |
451 |
|
|
start = start + len + 1; \ |
452 |
vapier |
1.69 |
} \ |
453 |
|
|
} \ |
454 |
vapier |
1.48 |
if (*r) *found_rpath = 1; \ |
455 |
vapier |
1.26 |
} \ |
456 |
|
|
++dyn; \ |
457 |
|
|
} \ |
458 |
|
|
} } |
459 |
|
|
SHOW_RPATH(32) |
460 |
|
|
SHOW_RPATH(64) |
461 |
vapier |
1.10 |
} |
462 |
vapier |
1.41 |
|
463 |
vapier |
1.70 |
if (be_wewy_wewy_quiet) return; |
464 |
|
|
|
465 |
vapier |
1.39 |
if (rpath && runpath) { |
466 |
vapier |
1.41 |
if (!strcmp(rpath, runpath)) { |
467 |
|
|
xstrcat(ret, runpath, ret_len); |
468 |
|
|
} else { |
469 |
vapier |
1.39 |
fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath); |
470 |
vapier |
1.41 |
xchrcat(ret, '{', ret_len); |
471 |
|
|
xstrcat(ret, rpath, ret_len); |
472 |
|
|
xchrcat(ret, ',', ret_len); |
473 |
|
|
xstrcat(ret, runpath, ret_len); |
474 |
|
|
xchrcat(ret, '}', ret_len); |
475 |
vapier |
1.39 |
} |
476 |
|
|
} else if (rpath || runpath) |
477 |
vapier |
1.41 |
xstrcat(ret, (runpath ? runpath : rpath), ret_len); |
478 |
|
|
else if (!be_quiet) |
479 |
|
|
xstrcat(ret, " - ", ret_len); |
480 |
vapier |
1.39 |
} |
481 |
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) |
482 |
vapier |
1.39 |
{ |
483 |
vapier |
1.44 |
unsigned long i; |
484 |
vapier |
1.39 |
char *needed; |
485 |
|
|
void *strtbl_void; |
486 |
|
|
|
487 |
vapier |
1.72 |
if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; |
488 |
vapier |
1.10 |
|
489 |
vapier |
1.39 |
strtbl_void = elf_findsecbyname(elf, ".dynstr"); |
490 |
vapier |
1.32 |
|
491 |
vapier |
1.44 |
if (elf->phdr && strtbl_void) { |
492 |
vapier |
1.32 |
#define SHOW_NEEDED(B) \ |
493 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
494 |
|
|
Elf ## B ## _Dyn *dyn; \ |
495 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
496 |
|
|
Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
497 |
|
|
Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ |
498 |
vapier |
1.44 |
Elf ## B ## _Off offset; \ |
499 |
vapier |
1.32 |
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
500 |
|
|
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
501 |
vapier |
1.44 |
offset = EGET(phdr[i].p_offset); \ |
502 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
503 |
|
|
dyn = DYN ## B (elf->data + offset); \ |
504 |
vapier |
1.32 |
while (EGET(dyn->d_tag) != DT_NULL) { \ |
505 |
|
|
if (EGET(dyn->d_tag) == DT_NEEDED) { \ |
506 |
vapier |
1.44 |
offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ |
507 |
vapier |
1.69 |
if (offset >= (Elf ## B ## _Off)elf->len) { \ |
508 |
vapier |
1.49 |
++dyn; \ |
509 |
|
|
continue; \ |
510 |
|
|
} \ |
511 |
vapier |
1.44 |
needed = (char*)(elf->data + offset); \ |
512 |
vapier |
1.72 |
if (op == 0) { \ |
513 |
|
|
if (!be_wewy_wewy_quiet) { \ |
514 |
|
|
if (*found_needed) xchrcat(ret, ',', ret_len); \ |
515 |
|
|
xstrcat(ret, needed, ret_len); \ |
516 |
|
|
} \ |
517 |
|
|
*found_needed = 1; \ |
518 |
|
|
} else { \ |
519 |
solar |
1.86 |
if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \ |
520 |
vapier |
1.81 |
*found_lib = 1; \ |
521 |
solar |
1.86 |
return (be_wewy_wewy_quiet ? NULL : needed); \ |
522 |
vapier |
1.81 |
} \ |
523 |
vapier |
1.72 |
} \ |
524 |
vapier |
1.32 |
} \ |
525 |
|
|
++dyn; \ |
526 |
|
|
} \ |
527 |
|
|
} } |
528 |
|
|
SHOW_NEEDED(32) |
529 |
|
|
SHOW_NEEDED(64) |
530 |
vapier |
1.85 |
if (op == 0 && !*found_needed && be_verbose) |
531 |
vapier |
1.84 |
warn("ELF lacks DT_NEEDED sections: %s", elf->filename); |
532 |
vapier |
1.32 |
} |
533 |
vapier |
1.72 |
|
534 |
|
|
return NULL; |
535 |
vapier |
1.39 |
} |
536 |
vapier |
1.41 |
static char *scanelf_file_interp(elfobj *elf, char *found_interp) |
537 |
vapier |
1.39 |
{ |
538 |
|
|
void *strtbl_void; |
539 |
|
|
|
540 |
vapier |
1.41 |
if (!show_interp) return NULL; |
541 |
vapier |
1.32 |
|
542 |
vapier |
1.39 |
strtbl_void = elf_findsecbyname(elf, ".interp"); |
543 |
vapier |
1.38 |
|
544 |
vapier |
1.39 |
if (strtbl_void) { |
545 |
vapier |
1.38 |
#define SHOW_INTERP(B) \ |
546 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
547 |
solar |
1.40 |
Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ |
548 |
|
|
*found_interp = 1; \ |
549 |
vapier |
1.70 |
return (be_wewy_wewy_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \ |
550 |
vapier |
1.38 |
} |
551 |
|
|
SHOW_INTERP(32) |
552 |
|
|
SHOW_INTERP(64) |
553 |
|
|
} |
554 |
vapier |
1.41 |
return NULL; |
555 |
vapier |
1.39 |
} |
556 |
vapier |
1.49 |
static char *scanelf_file_bind(elfobj *elf, char *found_bind) |
557 |
|
|
{ |
558 |
|
|
unsigned long i; |
559 |
|
|
struct stat s; |
560 |
|
|
|
561 |
|
|
if (!show_bind) return NULL; |
562 |
vapier |
1.51 |
if (!elf->phdr) return NULL; |
563 |
vapier |
1.49 |
|
564 |
|
|
#define SHOW_BIND(B) \ |
565 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
566 |
|
|
Elf ## B ## _Dyn *dyn; \ |
567 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
568 |
|
|
Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
569 |
|
|
Elf ## B ## _Off offset; \ |
570 |
|
|
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
571 |
|
|
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
572 |
|
|
offset = EGET(phdr[i].p_offset); \ |
573 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
574 |
|
|
dyn = DYN ## B (elf->data + offset); \ |
575 |
|
|
while (EGET(dyn->d_tag) != DT_NULL) { \ |
576 |
|
|
if (EGET(dyn->d_tag) == DT_BIND_NOW || \ |
577 |
|
|
(EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \ |
578 |
|
|
{ \ |
579 |
|
|
if (be_quiet) return NULL; \ |
580 |
|
|
*found_bind = 1; \ |
581 |
vapier |
1.70 |
return (char *)(be_wewy_wewy_quiet ? NULL : "NOW"); \ |
582 |
vapier |
1.49 |
} \ |
583 |
|
|
++dyn; \ |
584 |
|
|
} \ |
585 |
|
|
} \ |
586 |
|
|
} |
587 |
|
|
SHOW_BIND(32) |
588 |
|
|
SHOW_BIND(64) |
589 |
|
|
|
590 |
vapier |
1.70 |
if (be_wewy_wewy_quiet) return NULL; |
591 |
|
|
|
592 |
vapier |
1.56 |
if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) { |
593 |
vapier |
1.49 |
return NULL; |
594 |
|
|
} else { |
595 |
|
|
*found_bind = 1; |
596 |
solar |
1.68 |
return (char *) "LAZY"; |
597 |
vapier |
1.49 |
} |
598 |
|
|
} |
599 |
vapier |
1.84 |
static char *scanelf_file_soname(elfobj *elf, char *found_soname) |
600 |
|
|
{ |
601 |
|
|
unsigned long i; |
602 |
|
|
char *soname; |
603 |
|
|
void *strtbl_void; |
604 |
|
|
|
605 |
|
|
if (!show_soname) return NULL; |
606 |
|
|
|
607 |
|
|
strtbl_void = elf_findsecbyname(elf, ".dynstr"); |
608 |
|
|
|
609 |
|
|
if (elf->phdr && strtbl_void) { |
610 |
|
|
#define SHOW_SONAME(B) \ |
611 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
612 |
|
|
Elf ## B ## _Dyn *dyn; \ |
613 |
|
|
Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ |
614 |
|
|
Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ |
615 |
|
|
Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ |
616 |
|
|
Elf ## B ## _Off offset; \ |
617 |
|
|
/* only look for soname in shared objects */ \ |
618 |
|
|
if (ehdr->e_type != ET_DYN) \ |
619 |
|
|
return NULL; \ |
620 |
|
|
for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ |
621 |
|
|
if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ |
622 |
|
|
offset = EGET(phdr[i].p_offset); \ |
623 |
|
|
if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ |
624 |
|
|
dyn = DYN ## B (elf->data + offset); \ |
625 |
|
|
while (EGET(dyn->d_tag) != DT_NULL) { \ |
626 |
|
|
if (EGET(dyn->d_tag) == DT_SONAME) { \ |
627 |
|
|
offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ |
628 |
|
|
if (offset >= (Elf ## B ## _Off)elf->len) { \ |
629 |
|
|
++dyn; \ |
630 |
|
|
continue; \ |
631 |
|
|
} \ |
632 |
|
|
soname = (char*)(elf->data + offset); \ |
633 |
|
|
*found_soname = 1; \ |
634 |
|
|
return (be_wewy_wewy_quiet ? NULL : soname); \ |
635 |
|
|
} \ |
636 |
|
|
++dyn; \ |
637 |
|
|
} \ |
638 |
|
|
} } |
639 |
|
|
SHOW_SONAME(32) |
640 |
|
|
SHOW_SONAME(64) |
641 |
|
|
} |
642 |
|
|
|
643 |
|
|
return NULL; |
644 |
|
|
} |
645 |
vapier |
1.72 |
static char *scanelf_file_sym(elfobj *elf, char *found_sym) |
646 |
vapier |
1.39 |
{ |
647 |
vapier |
1.44 |
unsigned long i; |
648 |
vapier |
1.39 |
void *symtab_void, *strtab_void; |
649 |
vapier |
1.38 |
|
650 |
vapier |
1.41 |
if (!find_sym) return NULL; |
651 |
vapier |
1.32 |
|
652 |
vapier |
1.77 |
scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); |
653 |
vapier |
1.27 |
|
654 |
vapier |
1.39 |
if (symtab_void && strtab_void) { |
655 |
vapier |
1.27 |
#define FIND_SYM(B) \ |
656 |
|
|
if (elf->elf_class == ELFCLASS ## B) { \ |
657 |
|
|
Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ |
658 |
|
|
Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ |
659 |
|
|
Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ |
660 |
vapier |
1.44 |
unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ |
661 |
vapier |
1.27 |
char *symname; \ |
662 |
|
|
for (i = 0; i < cnt; ++i) { \ |
663 |
|
|
if (sym->st_name) { \ |
664 |
|
|
symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ |
665 |
solar |
1.28 |
if (*find_sym == '*') { \ |
666 |
vapier |
1.32 |
printf("%s(%s) %5lX %15s %s\n", \ |
667 |
vapier |
1.39 |
((*found_sym == 0) ? "\n\t" : "\t"), \ |
668 |
vapier |
1.76 |
elf->base_filename, \ |
669 |
vapier |
1.94 |
(unsigned long)sym->st_size, \ |
670 |
vapier |
1.32 |
(char *)get_elfstttype(sym->st_info), \ |
671 |
|
|
symname); \ |
672 |
vapier |
1.39 |
*found_sym = 1; \ |
673 |
vapier |
1.32 |
} else if ((strcmp(find_sym, symname) == 0) || \ |
674 |
vapier |
1.39 |
(strcmp(symname, versioned_symname) == 0)) \ |
675 |
|
|
(*found_sym)++; \ |
676 |
vapier |
1.27 |
} \ |
677 |
|
|
++sym; \ |
678 |
|
|
} } |
679 |
|
|
FIND_SYM(32) |
680 |
|
|
FIND_SYM(64) |
681 |
vapier |
1.39 |
} |
682 |
vapier |
1.70 |
|
683 |
|
|
if (be_wewy_wewy_quiet) return NULL; |
684 |
|
|
|
685 |
vapier |
1.41 |
if (*find_sym != '*' && *found_sym) |
686 |
|
|
return find_sym; |
687 |
|
|
if (be_quiet) |
688 |
|
|
return NULL; |
689 |
|
|
else |
690 |
solar |
1.68 |
return (char *)" - "; |
691 |
vapier |
1.39 |
} |
692 |
|
|
/* scan an elf file and show all the fun stuff */ |
693 |
solar |
1.57 |
#define prints(str) write(fileno(stdout), str, strlen(str)) |
694 |
vapier |
1.39 |
static void scanelf_file(const char *filename) |
695 |
|
|
{ |
696 |
vapier |
1.44 |
unsigned long i; |
697 |
solar |
1.73 |
char found_pax, found_phdr, found_relro, found_load, found_textrel, |
698 |
vapier |
1.84 |
found_rpath, found_needed, found_interp, found_bind, found_soname, |
699 |
vapier |
1.76 |
found_sym, found_lib, found_file, found_textrels; |
700 |
vapier |
1.39 |
elfobj *elf; |
701 |
|
|
struct stat st; |
702 |
vapier |
1.41 |
static char *out_buffer = NULL; |
703 |
|
|
static size_t out_len; |
704 |
vapier |
1.39 |
|
705 |
|
|
/* make sure 'filename' exists */ |
706 |
|
|
if (lstat(filename, &st) == -1) { |
707 |
|
|
if (be_verbose > 2) printf("%s: does not exist\n", filename); |
708 |
|
|
return; |
709 |
|
|
} |
710 |
|
|
/* always handle regular files and handle symlinked files if no -y */ |
711 |
vapier |
1.55 |
if (S_ISLNK(st.st_mode)) { |
712 |
|
|
if (!scan_symlink) return; |
713 |
|
|
stat(filename, &st); |
714 |
|
|
} |
715 |
|
|
if (!S_ISREG(st.st_mode)) { |
716 |
vapier |
1.39 |
if (be_verbose > 2) printf("%s: skipping non-file\n", filename); |
717 |
|
|
return; |
718 |
|
|
} |
719 |
|
|
|
720 |
vapier |
1.76 |
found_pax = found_phdr = found_relro = found_load = found_textrel = \ |
721 |
vapier |
1.84 |
found_rpath = found_needed = found_interp = found_bind = found_soname = \ |
722 |
vapier |
1.76 |
found_sym = found_lib = found_file = found_textrels = 0; |
723 |
vapier |
1.39 |
|
724 |
|
|
/* verify this is real ELF */ |
725 |
|
|
if ((elf = readelf(filename)) == NULL) { |
726 |
|
|
if (be_verbose > 2) printf("%s: not an ELF\n", filename); |
727 |
|
|
return; |
728 |
|
|
} |
729 |
|
|
|
730 |
|
|
if (be_verbose > 1) |
731 |
vapier |
1.41 |
printf("%s: scanning file {%s,%s}\n", filename, |
732 |
vapier |
1.69 |
get_elfeitype(EI_CLASS, elf->elf_class), |
733 |
|
|
get_elfeitype(EI_DATA, elf->data[EI_DATA])); |
734 |
vapier |
1.39 |
else if (be_verbose) |
735 |
|
|
printf("%s: scanning file\n", filename); |
736 |
|
|
|
737 |
vapier |
1.41 |
/* init output buffer */ |
738 |
|
|
if (!out_buffer) { |
739 |
|
|
out_len = sizeof(char) * 80; |
740 |
|
|
out_buffer = (char*)xmalloc(out_len); |
741 |
|
|
} |
742 |
|
|
*out_buffer = '\0'; |
743 |
|
|
|
744 |
vapier |
1.39 |
/* show the header */ |
745 |
|
|
if (!be_quiet && show_banner) { |
746 |
vapier |
1.49 |
for (i = 0; out_format[i]; ++i) { |
747 |
vapier |
1.70 |
if (!IS_MODIFIER(out_format[i])) continue; |
748 |
vapier |
1.41 |
|
749 |
|
|
switch (out_format[++i]) { |
750 |
|
|
case '%': break; |
751 |
vapier |
1.70 |
case '#': break; |
752 |
vapier |
1.66 |
case 'F': |
753 |
|
|
case 'p': |
754 |
|
|
case 'f': prints("FILE "); found_file = 1; break; |
755 |
vapier |
1.41 |
case 'o': prints(" TYPE "); break; |
756 |
|
|
case 'x': prints(" PAX "); break; |
757 |
vapier |
1.71 |
case 'e': prints("STK/REL/PTL "); break; |
758 |
vapier |
1.41 |
case 't': prints("TEXTREL "); break; |
759 |
|
|
case 'r': prints("RPATH "); break; |
760 |
|
|
case 'n': prints("NEEDED "); break; |
761 |
|
|
case 'i': prints("INTERP "); break; |
762 |
vapier |
1.49 |
case 'b': prints("BIND "); break; |
763 |
vapier |
1.84 |
case 'S': prints("SONAME "); break; |
764 |
vapier |
1.41 |
case 's': prints("SYM "); break; |
765 |
vapier |
1.72 |
case 'N': prints("LIB "); break; |
766 |
vapier |
1.76 |
case 'T': prints("TEXTRELS "); break; |
767 |
|
|
default: warnf("'%c' has no title ?", out_format[i]); |
768 |
vapier |
1.39 |
} |
769 |
vapier |
1.27 |
} |
770 |
vapier |
1.49 |
if (!found_file) prints("FILE "); |
771 |
vapier |
1.41 |
prints("\n"); |
772 |
vapier |
1.49 |
found_file = 0; |
773 |
vapier |
1.39 |
show_banner = 0; |
774 |
|
|
} |
775 |
|
|
|
776 |
|
|
/* dump all the good stuff */ |
777 |
vapier |
1.49 |
for (i = 0; out_format[i]; ++i) { |
778 |
vapier |
1.41 |
const char *out; |
779 |
vapier |
1.66 |
const char *tmp; |
780 |
vapier |
1.41 |
|
781 |
|
|
/* make sure we trim leading spaces in quiet mode */ |
782 |
|
|
if (be_quiet && *out_buffer == ' ' && !out_buffer[1]) |
783 |
|
|
*out_buffer = '\0'; |
784 |
vapier |
1.39 |
|
785 |
vapier |
1.70 |
if (!IS_MODIFIER(out_format[i])) { |
786 |
vapier |
1.41 |
xchrcat(&out_buffer, out_format[i], &out_len); |
787 |
|
|
continue; |
788 |
|
|
} |
789 |
vapier |
1.39 |
|
790 |
vapier |
1.41 |
out = NULL; |
791 |
vapier |
1.70 |
be_wewy_wewy_quiet = (out_format[i] == '#'); |
792 |
vapier |
1.41 |
switch (out_format[++i]) { |
793 |
vapier |
1.70 |
case '%': |
794 |
|
|
case '#': |
795 |
|
|
xchrcat(&out_buffer, out_format[i], &out_len); break; |
796 |
|
|
case 'F': |
797 |
vapier |
1.76 |
found_file = 1; |
798 |
vapier |
1.70 |
if (be_wewy_wewy_quiet) break; |
799 |
|
|
xstrcat(&out_buffer, filename, &out_len); |
800 |
|
|
break; |
801 |
vapier |
1.66 |
case 'p': |
802 |
vapier |
1.76 |
found_file = 1; |
803 |
vapier |
1.70 |
if (be_wewy_wewy_quiet) break; |
804 |
vapier |
1.66 |
tmp = filename; |
805 |
|
|
if (search_path) { |
806 |
|
|
ssize_t len_search = strlen(search_path); |
807 |
|
|
ssize_t len_file = strlen(filename); |
808 |
|
|
if (!strncmp(filename, search_path, len_search) && \ |
809 |
|
|
len_file > len_search) |
810 |
|
|
tmp += len_search; |
811 |
|
|
if (*tmp == '/' && search_path[len_search-1] == '/') tmp++; |
812 |
|
|
} |
813 |
|
|
xstrcat(&out_buffer, tmp, &out_len); |
814 |
|
|
break; |
815 |
|
|
case 'f': |
816 |
vapier |
1.76 |
found_file = 1; |
817 |
vapier |
1.70 |
if (be_wewy_wewy_quiet) break; |
818 |
vapier |
1.66 |
tmp = strrchr(filename, '/'); |
819 |
|
|
tmp = (tmp == NULL ? filename : tmp+1); |
820 |
|
|
xstrcat(&out_buffer, tmp, &out_len); |
821 |
|
|
break; |
822 |
vapier |
1.41 |
case 'o': out = get_elfetype(elf); break; |
823 |
|
|
case 'x': out = scanelf_file_pax(elf, &found_pax); break; |
824 |
solar |
1.73 |
case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break; |
825 |
vapier |
1.41 |
case 't': out = scanelf_file_textrel(elf, &found_textrel); break; |
826 |
vapier |
1.79 |
case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break; |
827 |
vapier |
1.41 |
case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; |
828 |
vapier |
1.72 |
case 'n': |
829 |
|
|
case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; |
830 |
vapier |
1.41 |
case 'i': out = scanelf_file_interp(elf, &found_interp); break; |
831 |
vapier |
1.49 |
case 'b': out = scanelf_file_bind(elf, &found_bind); break; |
832 |
vapier |
1.84 |
case 'S': out = scanelf_file_soname(elf, &found_soname); break; |
833 |
vapier |
1.72 |
case 's': out = scanelf_file_sym(elf, &found_sym); break; |
834 |
vapier |
1.76 |
default: warnf("'%c' has no scan code?", out_format[i]); |
835 |
vapier |
1.29 |
} |
836 |
vapier |
1.41 |
if (out) xstrcat(&out_buffer, out, &out_len); |
837 |
vapier |
1.39 |
} |
838 |
|
|
|
839 |
vapier |
1.54 |
#define FOUND_SOMETHING() \ |
840 |
solar |
1.73 |
(found_pax || found_phdr || found_relro || found_load || found_textrel || \ |
841 |
vapier |
1.76 |
found_rpath || found_needed || found_interp || found_bind || \ |
842 |
vapier |
1.84 |
found_soname || found_sym || found_lib || found_textrels) |
843 |
vapier |
1.54 |
|
844 |
|
|
if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { |
845 |
|
|
xchrcat(&out_buffer, ' ', &out_len); |
846 |
|
|
xstrcat(&out_buffer, filename, &out_len); |
847 |
vapier |
1.27 |
} |
848 |
vapier |
1.79 |
if (!be_quiet || (be_quiet && FOUND_SOMETHING())) { |
849 |
vapier |
1.41 |
puts(out_buffer); |
850 |
vapier |
1.79 |
fflush(stdout); |
851 |
|
|
} |
852 |
vapier |
1.10 |
|
853 |
|
|
unreadelf(elf); |
854 |
solar |
1.6 |
} |
855 |
|
|
|
856 |
solar |
1.1 |
/* scan a directory for ET_EXEC files and print when we find one */ |
857 |
vapier |
1.10 |
static void scanelf_dir(const char *path) |
858 |
solar |
1.1 |
{ |
859 |
vapier |
1.10 |
register DIR *dir; |
860 |
|
|
register struct dirent *dentry; |
861 |
vapier |
1.14 |
struct stat st_top, st; |
862 |
solar |
1.21 |
char buf[_POSIX_PATH_MAX]; |
863 |
vapier |
1.32 |
size_t pathlen = 0, len = 0; |
864 |
vapier |
1.10 |
|
865 |
|
|
/* make sure path exists */ |
866 |
vapier |
1.39 |
if (lstat(path, &st_top) == -1) { |
867 |
|
|
if (be_verbose > 2) printf("%s: does not exist\n", path); |
868 |
vapier |
1.10 |
return; |
869 |
vapier |
1.39 |
} |
870 |
solar |
1.11 |
|
871 |
vapier |
1.10 |
/* ok, if it isn't a directory, assume we can open it */ |
872 |
vapier |
1.14 |
if (!S_ISDIR(st_top.st_mode)) { |
873 |
vapier |
1.10 |
scanelf_file(path); |
874 |
|
|
return; |
875 |
|
|
} |
876 |
|
|
|
877 |
|
|
/* now scan the dir looking for fun stuff */ |
878 |
|
|
if ((dir = opendir(path)) == NULL) { |
879 |
|
|
warnf("could not opendir %s: %s", path, strerror(errno)); |
880 |
|
|
return; |
881 |
|
|
} |
882 |
vapier |
1.15 |
if (be_verbose) printf("%s: scanning dir\n", path); |
883 |
solar |
1.11 |
|
884 |
vapier |
1.32 |
pathlen = strlen(path); |
885 |
vapier |
1.10 |
while ((dentry = readdir(dir))) { |
886 |
|
|
if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) |
887 |
|
|
continue; |
888 |
vapier |
1.32 |
len = (pathlen + 1 + strlen(dentry->d_name) + 1); |
889 |
|
|
if (len >= sizeof(buf)) { |
890 |
vapier |
1.76 |
warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, |
891 |
|
|
(unsigned long)len, (unsigned long)sizeof(buf)); |
892 |
vapier |
1.32 |
continue; |
893 |
|
|
} |
894 |
solar |
1.31 |
sprintf(buf, "%s/%s", path, dentry->d_name); |
895 |
solar |
1.20 |
if (lstat(buf, &st) != -1) { |
896 |
vapier |
1.10 |
if (S_ISREG(st.st_mode)) |
897 |
solar |
1.20 |
scanelf_file(buf); |
898 |
vapier |
1.10 |
else if (dir_recurse && S_ISDIR(st.st_mode)) { |
899 |
vapier |
1.14 |
if (dir_crossmount || (st_top.st_dev == st.st_dev)) |
900 |
solar |
1.20 |
scanelf_dir(buf); |
901 |
vapier |
1.10 |
} |
902 |
|
|
} |
903 |
|
|
} |
904 |
|
|
closedir(dir); |
905 |
solar |
1.1 |
} |
906 |
|
|
|
907 |
vapier |
1.47 |
static int scanelf_from_file(char *filename) |
908 |
|
|
{ |
909 |
solar |
1.45 |
FILE *fp = NULL; |
910 |
|
|
char *p; |
911 |
|
|
char path[_POSIX_PATH_MAX]; |
912 |
|
|
|
913 |
|
|
if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) |
914 |
|
|
fp = stdin; |
915 |
|
|
else if ((fp = fopen(filename, "r")) == NULL) |
916 |
|
|
return 1; |
917 |
|
|
|
918 |
|
|
while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { |
919 |
|
|
if ((p = strchr(path, '\n')) != NULL) |
920 |
|
|
*p = 0; |
921 |
vapier |
1.66 |
search_path = path; |
922 |
solar |
1.45 |
scanelf_dir(path); |
923 |
|
|
} |
924 |
|
|
if (fp != stdin) |
925 |
|
|
fclose(fp); |
926 |
|
|
return 0; |
927 |
|
|
} |
928 |
|
|
|
929 |
vapier |
1.48 |
static void load_ld_so_conf() |
930 |
|
|
{ |
931 |
|
|
FILE *fp = NULL; |
932 |
|
|
char *p; |
933 |
|
|
char path[_POSIX_PATH_MAX]; |
934 |
|
|
int i = 0; |
935 |
|
|
|
936 |
|
|
if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) |
937 |
|
|
return; |
938 |
|
|
|
939 |
|
|
while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { |
940 |
|
|
if (*path != '/') |
941 |
|
|
continue; |
942 |
|
|
|
943 |
|
|
if ((p = strrchr(path, '\r')) != NULL) |
944 |
|
|
*p = 0; |
945 |
|
|
if ((p = strchr(path, '\n')) != NULL) |
946 |
|
|
*p = 0; |
947 |
|
|
|
948 |
|
|
ldpaths[i++] = xstrdup(path); |
949 |
|
|
|
950 |
|
|
if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) |
951 |
|
|
break; |
952 |
|
|
} |
953 |
|
|
ldpaths[i] = NULL; |
954 |
|
|
|
955 |
|
|
fclose(fp); |
956 |
|
|
} |
957 |
|
|
|
958 |
vapier |
1.10 |
/* scan /etc/ld.so.conf for paths */ |
959 |
|
|
static void scanelf_ldpath() |
960 |
|
|
{ |
961 |
vapier |
1.17 |
char scan_l, scan_ul, scan_ull; |
962 |
vapier |
1.48 |
int i = 0; |
963 |
vapier |
1.10 |
|
964 |
vapier |
1.48 |
if (!ldpaths[0]) |
965 |
|
|
err("Unable to load any paths from ld.so.conf"); |
966 |
vapier |
1.10 |
|
967 |
vapier |
1.17 |
scan_l = scan_ul = scan_ull = 0; |
968 |
|
|
|
969 |
vapier |
1.48 |
while (ldpaths[i]) { |
970 |
|
|
if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; |
971 |
|
|
if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; |
972 |
|
|
if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; |
973 |
|
|
scanelf_dir(ldpaths[i]); |
974 |
|
|
++i; |
975 |
|
|
} |
976 |
vapier |
1.10 |
|
977 |
vapier |
1.17 |
if (!scan_l) scanelf_dir("/lib"); |
978 |
|
|
if (!scan_ul) scanelf_dir("/usr/lib"); |
979 |
|
|
if (!scan_ull) scanelf_dir("/usr/local/lib"); |
980 |
vapier |
1.10 |
} |
981 |
solar |
1.1 |
|
982 |
vapier |
1.10 |
/* scan env PATH for paths */ |
983 |
|
|
static void scanelf_envpath() |
984 |
solar |
1.1 |
{ |
985 |
solar |
1.34 |
char *path, *p; |
986 |
vapier |
1.10 |
|
987 |
|
|
path = getenv("PATH"); |
988 |
|
|
if (!path) |
989 |
|
|
err("PATH is not set in your env !"); |
990 |
vapier |
1.41 |
path = xstrdup(path); |
991 |
vapier |
1.10 |
|
992 |
|
|
while ((p = strrchr(path, ':')) != NULL) { |
993 |
|
|
scanelf_dir(p + 1); |
994 |
|
|
*p = 0; |
995 |
|
|
} |
996 |
vapier |
1.17 |
|
997 |
solar |
1.34 |
free(path); |
998 |
solar |
1.1 |
} |
999 |
|
|
|
1000 |
|
|
|
1001 |
vapier |
1.10 |
|
1002 |
|
|
/* usage / invocation handling functions */ |
1003 |
solar |
1.86 |
#define PARSE_FLAGS "plRmyxetrnibSs:gN:TaqvF:f:o:BhV" |
1004 |
vapier |
1.27 |
#define a_argument required_argument |
1005 |
vapier |
1.10 |
static struct option const long_opts[] = { |
1006 |
|
|
{"path", no_argument, NULL, 'p'}, |
1007 |
|
|
{"ldpath", no_argument, NULL, 'l'}, |
1008 |
|
|
{"recursive", no_argument, NULL, 'R'}, |
1009 |
vapier |
1.14 |
{"mount", no_argument, NULL, 'm'}, |
1010 |
vapier |
1.37 |
{"symlink", no_argument, NULL, 'y'}, |
1011 |
vapier |
1.10 |
{"pax", no_argument, NULL, 'x'}, |
1012 |
solar |
1.16 |
{"header", no_argument, NULL, 'e'}, |
1013 |
vapier |
1.10 |
{"textrel", no_argument, NULL, 't'}, |
1014 |
|
|
{"rpath", no_argument, NULL, 'r'}, |
1015 |
vapier |
1.32 |
{"needed", no_argument, NULL, 'n'}, |
1016 |
vapier |
1.38 |
{"interp", no_argument, NULL, 'i'}, |
1017 |
vapier |
1.49 |
{"bind", no_argument, NULL, 'b'}, |
1018 |
vapier |
1.84 |
{"soname", no_argument, NULL, 'S'}, |
1019 |
vapier |
1.76 |
{"symbol", a_argument, NULL, 's'}, |
1020 |
|
|
{"lib", a_argument, NULL, 'N'}, |
1021 |
solar |
1.86 |
{"gmatch", no_argument, NULL, 'g'}, |
1022 |
vapier |
1.76 |
{"textrels", no_argument, NULL, 'T'}, |
1023 |
vapier |
1.10 |
{"all", no_argument, NULL, 'a'}, |
1024 |
|
|
{"quiet", no_argument, NULL, 'q'}, |
1025 |
vapier |
1.14 |
{"verbose", no_argument, NULL, 'v'}, |
1026 |
vapier |
1.76 |
{"format", a_argument, NULL, 'F'}, |
1027 |
|
|
{"from", a_argument, NULL, 'f'}, |
1028 |
|
|
{"file", a_argument, NULL, 'o'}, |
1029 |
solar |
1.16 |
{"nobanner", no_argument, NULL, 'B'}, |
1030 |
vapier |
1.10 |
{"help", no_argument, NULL, 'h'}, |
1031 |
|
|
{"version", no_argument, NULL, 'V'}, |
1032 |
|
|
{NULL, no_argument, NULL, 0x0} |
1033 |
|
|
}; |
1034 |
solar |
1.57 |
|
1035 |
solar |
1.68 |
static const char *opts_help[] = { |
1036 |
vapier |
1.10 |
"Scan all directories in PATH environment", |
1037 |
|
|
"Scan all directories in /etc/ld.so.conf", |
1038 |
vapier |
1.14 |
"Scan directories recursively", |
1039 |
vapier |
1.37 |
"Don't recursively cross mount points", |
1040 |
|
|
"Don't scan symlinks\n", |
1041 |
vapier |
1.10 |
"Print PaX markings", |
1042 |
vapier |
1.71 |
"Print GNU_STACK/PT_LOAD markings", |
1043 |
vapier |
1.10 |
"Print TEXTREL information", |
1044 |
|
|
"Print RPATH information", |
1045 |
vapier |
1.32 |
"Print NEEDED information", |
1046 |
vapier |
1.38 |
"Print INTERP information", |
1047 |
vapier |
1.49 |
"Print BIND information", |
1048 |
vapier |
1.84 |
"Print SONAME information", |
1049 |
vapier |
1.27 |
"Find a specified symbol", |
1050 |
vapier |
1.72 |
"Find a specified library", |
1051 |
solar |
1.86 |
"Use strncmp to match libraries. (use with -N)", |
1052 |
vapier |
1.76 |
"Locate cause of TEXTREL", |
1053 |
vapier |
1.82 |
"Print all scanned info (-x -e -t -r -b)\n", |
1054 |
vapier |
1.14 |
"Only output 'bad' things", |
1055 |
|
|
"Be verbose (can be specified more than once)", |
1056 |
vapier |
1.39 |
"Use specified format for output", |
1057 |
solar |
1.45 |
"Read input stream from a filename", |
1058 |
vapier |
1.24 |
"Write output stream to a filename", |
1059 |
vapier |
1.14 |
"Don't display the header", |
1060 |
vapier |
1.10 |
"Print this help and exit", |
1061 |
|
|
"Print version and exit", |
1062 |
|
|
NULL |
1063 |
|
|
}; |
1064 |
|
|
|
1065 |
|
|
/* display usage and exit */ |
1066 |
|
|
static void usage(int status) |
1067 |
solar |
1.1 |
{ |
1068 |
vapier |
1.44 |
unsigned long i; |
1069 |
solar |
1.52 |
printf("* Scan ELF binaries for stuff\n\n" |
1070 |
solar |
1.35 |
"Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); |
1071 |
|
|
printf("Options: -[%s]\n", PARSE_FLAGS); |
1072 |
vapier |
1.10 |
for (i = 0; long_opts[i].name; ++i) |
1073 |
vapier |
1.27 |
if (long_opts[i].has_arg == no_argument) |
1074 |
solar |
1.52 |
printf(" -%c, --%-13s* %s\n", long_opts[i].val, |
1075 |
vapier |
1.27 |
long_opts[i].name, opts_help[i]); |
1076 |
|
|
else |
1077 |
solar |
1.52 |
printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val, |
1078 |
vapier |
1.27 |
long_opts[i].name, opts_help[i]); |
1079 |
solar |
1.45 |
|
1080 |
|
|
if (status != EXIT_SUCCESS) |
1081 |
|
|
exit(status); |
1082 |
|
|
|
1083 |
vapier |
1.46 |
puts("\nThe format modifiers for the -F option are:"); |
1084 |
vapier |
1.70 |
puts(" F Filename \tx PaX Flags \te STACK/RELRO"); |
1085 |
|
|
puts(" t TEXTREL \tr RPATH \tn NEEDED"); |
1086 |
|
|
puts(" i INTERP \tb BIND \ts symbol"); |
1087 |
vapier |
1.76 |
puts(" N library \to Type \tT TEXTRELs"); |
1088 |
vapier |
1.88 |
puts(" S SONAME"); |
1089 |
vapier |
1.70 |
puts(" p filename (with search path removed)"); |
1090 |
vapier |
1.88 |
puts(" f filename (short name/basename)"); |
1091 |
vapier |
1.70 |
puts("Prefix each modifier with '%' (verbose) or '#' (silent)"); |
1092 |
solar |
1.45 |
|
1093 |
vapier |
1.10 |
exit(status); |
1094 |
solar |
1.1 |
} |
1095 |
|
|
|
1096 |
|
|
/* parse command line arguments and preform needed actions */ |
1097 |
vapier |
1.10 |
static void parseargs(int argc, char *argv[]) |
1098 |
|
|
{ |
1099 |
vapier |
1.48 |
int i; |
1100 |
solar |
1.45 |
char *from_file = NULL; |
1101 |
vapier |
1.10 |
|
1102 |
|
|
opterr = 0; |
1103 |
vapier |
1.48 |
while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { |
1104 |
|
|
switch (i) { |
1105 |
vapier |
1.10 |
|
1106 |
vapier |
1.39 |
case 'V': |
1107 |
vapier |
1.80 |
printf("pax-utils-%s: %s compiled %s\n%s\n" |
1108 |
|
|
"%s written for Gentoo by <solar and vapier @ gentoo.org>\n", |
1109 |
|
|
VERSION, __FILE__, __DATE__, rcsid, argv0); |
1110 |
vapier |
1.10 |
exit(EXIT_SUCCESS); |
1111 |
|
|
break; |
1112 |
|
|
case 'h': usage(EXIT_SUCCESS); break; |
1113 |
solar |
1.45 |
case 'f': |
1114 |
solar |
1.64 |
if (from_file) err("Don't specify -f twice"); |
1115 |
|
|
from_file = xstrdup(optarg); |
1116 |
solar |
1.45 |
break; |
1117 |
vapier |
1.24 |
case 'o': { |
1118 |
solar |
1.21 |
FILE *fp = NULL; |
1119 |
solar |
1.64 |
if ((fp = freopen(optarg, "w", stdout)) == NULL) |
1120 |
vapier |
1.24 |
err("Could not open output stream '%s': %s", optarg, strerror(errno)); |
1121 |
vapier |
1.65 |
SET_STDOUT(fp); |
1122 |
solar |
1.21 |
break; |
1123 |
|
|
} |
1124 |
vapier |
1.24 |
|
1125 |
vapier |
1.39 |
case 's': { |
1126 |
vapier |
1.93 |
if (find_sym) warn("You prob don't want to specify -s twice"); |
1127 |
|
|
find_sym = optarg; |
1128 |
|
|
versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1)); |
1129 |
vapier |
1.39 |
sprintf(versioned_symname, "%s@", find_sym); |
1130 |
|
|
break; |
1131 |
|
|
} |
1132 |
vapier |
1.72 |
case 'N': { |
1133 |
vapier |
1.93 |
if (find_lib) warn("You prob don't want to specify -N twice"); |
1134 |
|
|
find_lib = optarg; |
1135 |
vapier |
1.72 |
break; |
1136 |
|
|
} |
1137 |
vapier |
1.39 |
|
1138 |
|
|
case 'F': { |
1139 |
vapier |
1.93 |
if (out_format) warn("You prob don't want to specify -F twice"); |
1140 |
|
|
out_format = optarg; |
1141 |
vapier |
1.39 |
break; |
1142 |
|
|
} |
1143 |
vapier |
1.27 |
|
1144 |
solar |
1.86 |
case 'g': gmatch = 1; |
1145 |
vapier |
1.37 |
case 'y': scan_symlink = 0; break; |
1146 |
solar |
1.16 |
case 'B': show_banner = 0; break; |
1147 |
vapier |
1.10 |
case 'l': scan_ldpath = 1; break; |
1148 |
|
|
case 'p': scan_envpath = 1; break; |
1149 |
|
|
case 'R': dir_recurse = 1; break; |
1150 |
vapier |
1.14 |
case 'm': dir_crossmount = 0; break; |
1151 |
vapier |
1.10 |
case 'x': show_pax = 1; break; |
1152 |
solar |
1.73 |
case 'e': show_phdr = 1; break; |
1153 |
vapier |
1.10 |
case 't': show_textrel = 1; break; |
1154 |
|
|
case 'r': show_rpath = 1; break; |
1155 |
vapier |
1.32 |
case 'n': show_needed = 1; break; |
1156 |
vapier |
1.38 |
case 'i': show_interp = 1; break; |
1157 |
vapier |
1.49 |
case 'b': show_bind = 1; break; |
1158 |
vapier |
1.84 |
case 'S': show_soname = 1; break; |
1159 |
vapier |
1.76 |
case 'T': show_textrels = 1; break; |
1160 |
vapier |
1.10 |
case 'q': be_quiet = 1; break; |
1161 |
vapier |
1.14 |
case 'v': be_verbose = (be_verbose % 20) + 1; break; |
1162 |
vapier |
1.82 |
case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break; |
1163 |
vapier |
1.10 |
|
1164 |
|
|
case ':': |
1165 |
vapier |
1.49 |
err("Option missing parameter\n"); |
1166 |
vapier |
1.10 |
case '?': |
1167 |
vapier |
1.49 |
err("Unknown option\n"); |
1168 |
vapier |
1.10 |
default: |
1169 |
vapier |
1.48 |
err("Unhandled option '%c'", i); |
1170 |
vapier |
1.10 |
} |
1171 |
|
|
} |
1172 |
|
|
|
1173 |
vapier |
1.39 |
/* let the format option override all other options */ |
1174 |
|
|
if (out_format) { |
1175 |
solar |
1.73 |
show_pax = show_phdr = show_textrel = show_rpath = \ |
1176 |
vapier |
1.84 |
show_needed = show_interp = show_bind = show_soname = \ |
1177 |
|
|
show_textrels = 0; |
1178 |
vapier |
1.48 |
for (i = 0; out_format[i]; ++i) { |
1179 |
vapier |
1.70 |
if (!IS_MODIFIER(out_format[i])) continue; |
1180 |
vapier |
1.39 |
|
1181 |
vapier |
1.48 |
switch (out_format[++i]) { |
1182 |
vapier |
1.39 |
case '%': break; |
1183 |
vapier |
1.70 |
case '#': break; |
1184 |
vapier |
1.39 |
case 'F': break; |
1185 |
vapier |
1.66 |
case 'p': break; |
1186 |
|
|
case 'f': break; |
1187 |
vapier |
1.39 |
case 's': break; |
1188 |
vapier |
1.72 |
case 'N': break; |
1189 |
vapier |
1.41 |
case 'o': break; |
1190 |
vapier |
1.39 |
case 'x': show_pax = 1; break; |
1191 |
solar |
1.73 |
case 'e': show_phdr = 1; break; |
1192 |
vapier |
1.39 |
case 't': show_textrel = 1; break; |
1193 |
|
|
case 'r': show_rpath = 1; break; |
1194 |
|
|
case 'n': show_needed = 1; break; |
1195 |
|
|
case 'i': show_interp = 1; break; |
1196 |
vapier |
1.49 |
case 'b': show_bind = 1; break; |
1197 |
vapier |
1.84 |
case 'S': show_soname = 1; break; |
1198 |
vapier |
1.76 |
case 'T': show_textrels = 1; break; |
1199 |
vapier |
1.39 |
default: |
1200 |
|
|
err("Invalid format specifier '%c' (byte %i)", |
1201 |
vapier |
1.48 |
out_format[i], i+1); |
1202 |
vapier |
1.39 |
} |
1203 |
|
|
} |
1204 |
vapier |
1.41 |
|
1205 |
|
|
/* construct our default format */ |
1206 |
|
|
} else { |
1207 |
|
|
size_t fmt_len = 30; |
1208 |
|
|
out_format = (char*)xmalloc(sizeof(char) * fmt_len); |
1209 |
vapier |
1.76 |
if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); |
1210 |
|
|
if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); |
1211 |
|
|
if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); |
1212 |
|
|
if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); |
1213 |
|
|
if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); |
1214 |
|
|
if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); |
1215 |
|
|
if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); |
1216 |
|
|
if (show_bind) xstrcat(&out_format, "%b ", &fmt_len); |
1217 |
vapier |
1.84 |
if (show_soname) xstrcat(&out_format, "%S ", &fmt_len); |
1218 |
vapier |
1.76 |
if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len); |
1219 |
|
|
if (find_sym) xstrcat(&out_format, "%s ", &fmt_len); |
1220 |
|
|
if (find_lib) xstrcat(&out_format, "%N ", &fmt_len); |
1221 |
|
|
if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); |
1222 |
vapier |
1.39 |
} |
1223 |
vapier |
1.41 |
if (be_verbose > 2) printf("Format: %s\n", out_format); |
1224 |
vapier |
1.39 |
|
1225 |
|
|
/* now lets actually do the scanning */ |
1226 |
vapier |
1.48 |
if (scan_ldpath || (show_rpath && be_quiet)) |
1227 |
|
|
load_ld_so_conf(); |
1228 |
vapier |
1.10 |
if (scan_ldpath) scanelf_ldpath(); |
1229 |
|
|
if (scan_envpath) scanelf_envpath(); |
1230 |
solar |
1.45 |
if (from_file) { |
1231 |
|
|
scanelf_from_file(from_file); |
1232 |
|
|
free(from_file); |
1233 |
|
|
from_file = *argv; |
1234 |
|
|
} |
1235 |
|
|
if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) |
1236 |
vapier |
1.25 |
err("Nothing to scan !?"); |
1237 |
vapier |
1.66 |
while (optind < argc) { |
1238 |
|
|
search_path = argv[optind++]; |
1239 |
|
|
scanelf_dir(search_path); |
1240 |
|
|
} |
1241 |
vapier |
1.27 |
|
1242 |
vapier |
1.39 |
/* clean up */ |
1243 |
vapier |
1.93 |
if (versioned_symname) free(versioned_symname); |
1244 |
vapier |
1.48 |
for (i = 0; ldpaths[i]; ++i) |
1245 |
|
|
free(ldpaths[i]); |
1246 |
vapier |
1.10 |
} |
1247 |
|
|
|
1248 |
|
|
|
1249 |
|
|
|
1250 |
vapier |
1.41 |
/* utility funcs */ |
1251 |
vapier |
1.60 |
static char *xstrdup(const char *s) |
1252 |
vapier |
1.41 |
{ |
1253 |
|
|
char *ret = strdup(s); |
1254 |
|
|
if (!ret) err("Could not strdup(): %s", strerror(errno)); |
1255 |
|
|
return ret; |
1256 |
|
|
} |
1257 |
solar |
1.57 |
|
1258 |
vapier |
1.41 |
static void *xmalloc(size_t size) |
1259 |
|
|
{ |
1260 |
|
|
void *ret = malloc(size); |
1261 |
|
|
if (!ret) err("Could not malloc() %li bytes", (unsigned long)size); |
1262 |
|
|
return ret; |
1263 |
|
|
} |
1264 |
solar |
1.57 |
|
1265 |
vapier |
1.41 |
static void xstrcat(char **dst, const char *src, size_t *curr_len) |
1266 |
|
|
{ |
1267 |
vapier |
1.69 |
size_t new_len; |
1268 |
vapier |
1.41 |
|
1269 |
|
|
new_len = strlen(*dst) + strlen(src); |
1270 |
|
|
if (*curr_len <= new_len) { |
1271 |
|
|
*curr_len = new_len + (*curr_len / 2); |
1272 |
|
|
*dst = realloc(*dst, *curr_len); |
1273 |
|
|
if (!*dst) |
1274 |
|
|
err("could not realloc %li bytes", (unsigned long)*curr_len); |
1275 |
|
|
} |
1276 |
|
|
|
1277 |
|
|
strcat(*dst, src); |
1278 |
|
|
} |
1279 |
solar |
1.57 |
|
1280 |
vapier |
1.41 |
static inline void xchrcat(char **dst, const char append, size_t *curr_len) |
1281 |
|
|
{ |
1282 |
|
|
static char my_app[2]; |
1283 |
|
|
my_app[0] = append; |
1284 |
|
|
my_app[1] = '\0'; |
1285 |
|
|
xstrcat(dst, my_app, curr_len); |
1286 |
|
|
} |
1287 |
|
|
|
1288 |
|
|
|
1289 |
vapier |
1.72 |
|
1290 |
vapier |
1.10 |
int main(int argc, char *argv[]) |
1291 |
solar |
1.1 |
{ |
1292 |
vapier |
1.10 |
if (argc < 2) |
1293 |
|
|
usage(EXIT_FAILURE); |
1294 |
|
|
parseargs(argc, argv); |
1295 |
solar |
1.21 |
fclose(stdout); |
1296 |
solar |
1.61 |
#ifdef __BOUNDS_CHECKING_ON |
1297 |
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()"); |
1298 |
solar |
1.61 |
#endif |
1299 |
vapier |
1.10 |
return EXIT_SUCCESS; |
1300 |
solar |
1.1 |
} |