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
|
/*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <unistd.h>
#include <sys/mman.h>
#include <errno.h>
#include <sys/syscall.h>
libc_hidden_proto(mmap)
#define __syscall_clobbers \
"r9", "r10", "r11", "r12"
#define __syscall_return(type) \
return (__sc_err & 0x10000000 ? errno = __sc_ret, __sc_ret = -1 : 0), \
(type) __sc_ret
void * mmap(void *start, size_t length, int prot, int flags, int fd,
off_t offset)
{
unsigned long __sc_ret, __sc_err;
register unsigned long __sc_0 __asm__ ("r0");
register unsigned long __sc_3 __asm__ ("r3");
register unsigned long __sc_4 __asm__ ("r4");
register unsigned long __sc_5 __asm__ ("r5");
register unsigned long __sc_6 __asm__ ("r6");
register unsigned long __sc_7 __asm__ ("r7");
register unsigned long __sc_8 __asm__ ("r8");
__sc_3 = (unsigned long) start;
__sc_4 = (unsigned long) length;
__sc_5 = (unsigned long) prot;
__sc_6 = (unsigned long) flags;
__sc_7 = (unsigned long) fd;
__sc_8 = (unsigned long) offset;
__sc_0 = __NR_mmap;
__asm__ __volatile__
("sc \n\t"
"mfcr %1 "
: "=&r" (__sc_3), "=&r" (__sc_0)
: "0" (__sc_3), "1" (__sc_0),
"r" (__sc_4),
"r" (__sc_5),
"r" (__sc_6),
"r" (__sc_7),
"r" (__sc_8)
: __syscall_clobbers);
__sc_ret = __sc_3;
__sc_err = __sc_0;
__syscall_return (void *);
}
libc_hidden_def(mmap)
|
