diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/s390/s390-32/syscall.S')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/s390/s390-32/syscall.S | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/s390/s390-32/syscall.S b/REORG.TODO/sysdeps/unix/sysv/linux/s390/s390-32/syscall.S new file mode 100644 index 0000000000..8506db1cc1 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/s390/s390-32/syscall.S @@ -0,0 +1,67 @@ +/* Copyright (C) 2000-2017 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) |