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
|
/* Copyright (C) 2001 Free Software Foundation, Inc.
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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, 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/s390/sysdep.h for
more information about the value -4095 used below.*/
ENTRY (syscall)
/* Save registers and setup stack. */
stmg %r6,%r15,48(%r15) /* Save registers. */
lgr %r1,%r15
lg %r0,8(%r15) /* Load eos. */
aghi %r15,-160 /* Buy stack space. */
stg %r1,0(%r15) /* Store back chain. */
stg %r0,8(%r15) /* Store eos. */
lgr %r1,%r2 /* Move syscall number. */
lgr %r2,%r3 /* First parameter. */
lgr %r3,%r4 /* Second parameter. */
lgr %r4,%r5 /* Third parameter. */
lgr %r5,%r6 /* Fourth parameter. */
lg %r6,320(%r15) /* Fifth parameter. */
basr %r7,0
.L0: ex %r1,.L1-.L0(%r7) /* Lsb of R1 is subsituted as SVC number. */
lg %r15,0(%r15) /* Load back chain. */
lmg %r6,15,48(%r15) /* Load registers. */
lghi %r0,-4095
clgr %r2,%r0 /* Check R2 for error. */
jnl SYSCALL_ERROR_LABEL
br %r14 /* Return to caller. */
.L1: .word 0x0A00 /* Opcode for SVC 0. */
PSEUDO_END (syscall)
|
