summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux/i386/mmap.S
blob: 8f9b032433e741b2ca2930635b565858bfc7df01 (plain)
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
/* Copyright (C) 1995,96,97,98,99,2000,2002,2005 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 Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#define _ERRNO_H	1
#include <features.h>
#include <bits/errno.h>
#include <sys/syscall.h>

.text
.global mmap
.type   mmap,%function
mmap:

	/* Save registers.  */
	movl %ebx, %edx

	movl $__NR_mmap, %eax	/* System call number in %eax.  */

	lea 4(%esp), %ebx		/* Address of args is 1st arg.  */

	/* Do the system call trap.  */
	int $0x80

	/* Restore registers.  */
	movl %edx, %ebx

	/* If 0 > %eax > -4096 there was an error.  */
	cmpl $-4096, %eax
	ja __syscall_error

	/* Successful; return the syscall's value.  */
	ret

.size mmap,.-mmap

libc_hidden_def(mmap)