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
| | #ifndef LIBC_H
#define LIBC_H
#include <stdlib.h>
#include <stdio.h>
struct __libc {
void *main_thread;
int threaded;
int secure;
size_t *auxv;
int (*atexit)(void (*)(void));
void (*fini)(void);
void (*ldso_fini)(void);
volatile int threads_minus_1;
int canceldisable;
FILE *ofl_head;
int ofl_lock[2];
size_t tls_size;
};
extern size_t __hwcap;
#if !defined(__PIC__) || (100*__GNUC__+__GNUC_MINOR__ >= 303 && !defined(__PCC__))
#ifdef __PIC__
#if __GNUC__ < 4
#define BROKEN_VISIBILITY 1
#endif
#define ATTR_LIBC_VISIBILITY __attribute__((visibility("hidden")))
#else
#define ATTR_LIBC_VISIBILITY
#endif
extern struct __libc __libc ATTR_LIBC_VISIBILITY;
#define libc __libc
#else
#define USE_LIBC_ACCESSOR
#define ATTR_LIBC_VISIBILITY
extern struct __libc *__libc_loc(void) __attribute__((const));
#define libc (*__libc_loc())
#endif
/* Designed to avoid any overhead in non-threaded processes */
void __lock(volatile int *) ATTR_LIBC_VISIBILITY;
void __unlock(volatile int *) ATTR_LIBC_VISIBILITY;
int __lockfile(FILE *) ATTR_LIBC_VISIBILITY;
void __unlockfile(FILE *) ATTR_LIBC_VISIBILITY;
#define LOCK(x) (libc.threads_minus_1 ? (__lock(x),1) : ((void)(x),1))
#define UNLOCK(x) (libc.threads_minus_1 ? (__unlock(x),1) : ((void)(x),1))
void __synccall(void (*)(void *), void *);
int __setxid(int, int, int, int);
extern char **__environ;
/* Provide a dummy location for all readonly symbols that are
weak. This is a fallback that should always have a value of all
zero and suitable aligned to be able to serve as an address for any
type. */
#define WEAK_PROVIDE_DUMMY __attribute__((__weak__, __aligned__(32))) struct { unsigned char const _arr[32]; } __readonly_dummy
#define _Readonly_alias extern __attribute__((__weak__,__alias__("__readonly_dummy")))
#define _Weak extern __attribute__((__weak__))
#undef weak_alias
#define weak_alias(old, new) \
extern __typeof(old) new __attribute__((weak, alias(#old)))
/* provide a weak function symbol for a function that receives no
arguments */
#define WEAK_PROVIDE_VOID \
_Weak \
void __weak_dummy_void(void) { \
/* empty */ \
} \
/* syntax sugar */ \
_Weak void __weak_dummy_void(void)
/* provide a weak function symbol for a function that receives a void
pointer argument */
#define WEAK_PROVIDE_VOIDP \
_Weak \
void __weak_dummy_voidp(void* _ign) { \
/* empty */ \
} \
/* syntax sugar */ \
_Weak void __weak_dummy_voidp(void*)
/* provide a weak function symbol for a function that receives an int
argument */
#define WEAK_PROVIDE_INT \
_Weak \
void __weak_dummy_int(int _ign) { \
/* empty */ \
} \
/* syntax sugar */ \
_Weak void __weak_dummy_int(int _ign)
#undef LFS64_2
#define LFS64_2(x, y) weak_alias(x, y)
#undef LFS64
#define LFS64(x) LFS64_2(x, x##64)
#endif
|