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
|
/* Copyright (C) 1995, 1996, 1997 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 <sysdep.h>
/* Please consult the file sysdeps/unix/sysv/linux/arm/sysdep.h for
more information about the value -4095 used below.*/
.text
ENTRY (syscall)
/* Normally encoding the system call number in the instruction is
good. But we pay the price here. */
sub sp, sp, $0xc @ get 3 words on the stack
orr r0, r0, $0xef000000 @ make up a SWI instruction
orr r0, r0, $SWI_BASE
str r0, [sp]
ldr r0, _reti
str r0, [sp, $4]
adr r0, _ret
str r0, [sp, $8]
mov r0, r1
mov r1, r2
mov r2, r3
mov pc, sp
_ret: add sp, sp, $0xc
RETINSTR(mov, pc, r14)
_reti: .word 0xe51ff004 @ ldr pc, [pc, $4]
PSEUDO_END (syscall)
|
