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
|
/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
/*
* Based in part on the files
* ./sysdeps/unix/sysv/linux/pwrite.c,
* ./sysdeps/unix/sysv/linux/pread.c,
* sysdeps/posix/pread.c
* sysdeps/posix/pwrite.c
* from GNU libc 2.2.5, but reworked considerably...
*/
#include <sys/syscall.h>
#include <unistd.h>
#include <stdint.h>
#include <endian.h>
#include <sgidefs.h>
#ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */
# ifdef __NR_pread
# error "__NR_pread and __NR_pread64 both defined???"
# endif
# define __NR_pread __NR_pread64
#endif
extern __typeof(pread) __libc_pread;
extern __typeof(pwrite) __libc_pwrite;
#ifdef __UCLIBC_HAS_LFS__
extern __typeof(pread64) __libc_pread64;
extern __typeof(pwrite64) __libc_pwrite64;
#endif
#include <bits/kernel_types.h>
#ifdef __NR_pread
# if _MIPS_SIM == _MIPS_SIM_ABI64
# define __NR___libc_pread __NR_pread
_syscall4(ssize_t, __libc_pread, int, fd, void *, buf, size_t, count, off_t, offset)
weak_alias (__libc_pread, pread)
# ifdef __UCLIBC_HAS_LFS__
# define __NR___libc_pread64 __NR_pread
_syscall4(ssize_t, __libc_pread64, int, fd, void *, buf, size_t, count, off64_t, offset)
weak_alias (__libc_pread64, pread64)
# endif /* __UCLIBC_HAS_LFS__ */
# else /* O32 || N32 */
# define __NR___syscall_pread __NR_pread
static __inline__ _syscall6(ssize_t, __syscall_pread, int, fd, void *, buf,
size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo);
ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset)
{
return(__syscall_pread(fd,buf,count,0,__LONG_LONG_PAIR(offset>>31,offset)));
}
weak_alias(__libc_pread,pread)
# ifdef __UCLIBC_HAS_LFS__
ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
{
uint32_t low = offset & 0xffffffff;
uint32_t high = offset >> 32;
return(__syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR (high, low)));
}
weak_alias(__libc_pread64,pread64)
# endif /* __UCLIBC_HAS_LFS__ */
# endif /* O32 || N32 */
#endif /* __NR_pread */
/**********************************************************************/
#ifdef __NR_pwrite64 /* Newer kernels renamed but it's the same. */
# ifdef __NR_pwrite
# error "__NR_pwrite and __NR_pwrite64 both defined???"
# endif
# define __NR_pwrite __NR_pwrite64
#endif
#ifdef __NR_pwrite
# if _MIPS_SIM == _MIPS_SIM_ABI64
# define __NR___libc_pwrite __NR_pwrite
_syscall4(ssize_t, __libc_pwrite, int, fd, const void *, buf, size_t, count, off_t, offset)
weak_alias (__libc_pwrite, pwrite)
# ifdef __UCLIBC_HAS_LFS__
# define __NR___libc_pwrite64 __NR_pwrite
_syscall4(ssize_t, __libc_pwrite64, int, fd, const void *, buf, size_t, count, off64_t, offset)
weak_alias (__libc_pwrite64, pwrite64)
# endif /* __UCLIBC_HAS_LFS__ */
# else /* O32 || N32 */
# define __NR___syscall_pwrite __NR_pwrite
static __inline__ _syscall6(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo);
ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
{
return(__syscall_pwrite(fd,buf,count,0,__LONG_LONG_PAIR(offset>>31,offset)));
}
weak_alias(__libc_pwrite,pwrite)
# ifdef __UCLIBC_HAS_LFS__
ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
{
uint32_t low = offset & 0xffffffff;
uint32_t high = offset >> 32;
return(__syscall_pwrite(fd, buf, count, 0, __LONG_LONG_PAIR (high, low)));
}
weak_alias(__libc_pwrite64,pwrite64)
# endif /* __UCLIBC_HAS_LFS__ */
# endif /* O32 || N32 */
#endif /* __NR_pwrite */
|
