1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/* Support for reading /etc/ld.so.cache files written by Linux ldconfig.
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <stdint.h>
#ifndef _DL_CACHE_DEFAULT_ID
# define _DL_CACHE_DEFAULT_ID 3
#endif
#ifndef _dl_cache_check_flags
# define _dl_cache_check_flags(flags) \
((flags) == 1 || (flags) == _DL_CACHE_DEFAULT_ID)
#endif
#ifndef LD_SO_CACHE
# define LD_SO_CACHE SYSCONFDIR "/ld.so.cache"
#endif
#define CACHEMAGIC "ld.so-1.7.0"
/* libc5 and glibc 2.0/2.1 use the same format. For glibc 2.2 another
format has been added in a compatible way:
The beginning of the string table is used for the new table:
old_magic
nlibs
libs[0]
...
libs[nlibs-1]
pad, new magic needs to be aligned
- this is string[0] for the old format
new magic - this is string[0] for the new format
newnlibs
...
newlibs[0]
...
newlibs[newnlibs-1]
string 1
string 2
...
*/
struct file_entry
{
int flags; /* This is 1 for an ELF library. */
unsigned int key, value; /* String table indices. */
};
struct cache_file
{
char magic[sizeof CACHEMAGIC - 1];
unsigned int nlibs;
struct file_entry libs[0];
};
#define CACHEMAGIC_NEW "glibc-ld.so.cache"
#define CACHE_VERSION "1.1"
#define CACHEMAGIC_VERSION_NEW CACHEMAGIC_NEW CACHE_VERSION
struct file_entry_new
{
int32_t flags; /* This is 1 for an ELF library. */
uint32_t key, value; /* String table indices. */
uint32_t osversion; /* Required OS version. */
uint64_t hwcap; /* Hwcap entry. */
};
struct cache_file_new
{
char magic[sizeof CACHEMAGIC_NEW - 1];
char version[sizeof CACHE_VERSION - 1];
uint32_t nlibs; /* Number of entries. */
uint32_t len_strings; /* Size of string table. */
uint32_t unused[5]; /* Leave space for future extensions
and align to 8 byte boundary. */
struct file_entry_new libs[0]; /* Entries describing libraries. */
/* After this the string table of size len_strings is found. */
};
/* Used to align cache_file_new. */
#define ALIGN_CACHE(addr) \
(((addr) + __alignof__ (struct cache_file_new) -1) \
& (~(__alignof__ (struct cache_file_new) - 1)))
static int
_dl_cache_libcmp (const char *p1, const char *p2)
{
while (*p1 != '\0')
{
if (*p1 >= '0' && *p1 <= '9')
{
if (*p2 >= '0' && *p2 <= '9')
{
/* Must compare this numerically. */
int val1;
int val2;
val1 = *p1++ - '0';
val2 = *p2++ - '0';
while (*p1 >= '0' && *p1 <= '9')
val1 = val1 * 10 + *p1++ - '0';
while (*p2 >= '0' && *p2 <= '9')
val2 = val2 * 10 + *p2++ - '0';
if (val1 != val2)
return val1 - val2;
}
else
return 1;
}
else if (*p2 >= '0' && *p2 <= '9')
return -1;
else if (*p1 != *p2)
return *p1 - *p2;
else
{
++p1;
++p2;
}
}
return *p1 - *p2;
}
|
