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/* Copyright (C) 2000-2015 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, see
<http://www.gnu.org/licenses/>. */
#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. */
stm %r6,%r15,24(%r15) /* save registers */
cfi_offset (%r15, -36)
cfi_offset (%r14, -40)
cfi_offset (%r13, -44)
cfi_offset (%r12, -48)
cfi_offset (%r11, -52)
cfi_offset (%r10, -56)
cfi_offset (%r9, -60)
cfi_offset (%r8, -64)
cfi_offset (%r7, -68)
cfi_offset (%r6, -72)
lr %r1,%r15
l %r0,4(0,%r15) /* load eos */
ahi %r15,-96 /* buy stack space */
cfi_adjust_cfa_offset (96)
st %r1,0(0,%r15) /* store back chain */
st %r0,4(0,%r15) /* store eos */
lr %r1,%r2 /* move syscall number */
lr %r2,%r3 /* first parameter */
lr %r3,%r4 /* second parameter */
lr %r4,%r5 /* third parameter */
lr %r5,%r6 /* fourth parameter */
l %r6,192(%r15) /* fifth parameter */
l %r7,196(%r15) /* sixth parameter */
basr %r8,0
0: cl %r1,4f-0b(%r8) /* svc number < 256? */
jl 2f
1: svc 0
j 3f
2: ex %r1,1b-0b(%r8) /* lsb of R1 is subsituted as SVC number */
3: l %r15,0(%r15) /* load back chain */
cfi_adjust_cfa_offset (-96)
lm %r6,15,24(%r15) /* load registers */
lhi %r0,-4095
clr %r2,%r0 /* check R2 for error */
jnl SYSCALL_ERROR_LABEL
br %r14 /* return to caller */
4: .long 256
PSEUDO_END (syscall)
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