| /* Copyright (C) 2000, 2001, 2006 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. */ |
| 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) |
