diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/s390/s390-64/syscall.S')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/s390/s390-64/syscall.S | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/s390/s390-64/syscall.S b/REORG.TODO/sysdeps/unix/sysv/linux/s390/s390-64/syscall.S new file mode 100644 index 0000000000..24c47cb75a --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/s390/s390-64/syscall.S @@ -0,0 +1,68 @@ +/* Copyright (C) 2001-2017 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. */ + stmg %r6,%r15,48(%r15) /* Save registers. */ + cfi_offset (%r15,-40) + cfi_offset (%r14,-48) + cfi_offset (%r13,-56) + cfi_offset (%r12,-64) + cfi_offset (%r11,-72) + cfi_offset (%r10,-80) + cfi_offset (%r9,-88) + cfi_offset (%r8,-96) + cfi_offset (%r7,-104) + cfi_offset (%r6,-112) + lgr %r1,%r15 + lg %r0,8(%r15) /* Load eos. */ + aghi %r15,-160 /* Buy stack space. */ + cfi_adjust_cfa_offset (160) + 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. */ + lg %r7,328(%r15) /* Sixth parameter. */ + + basr %r8,0 +0: clg %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: lg %r15,0(%r15) /* load back chain */ + cfi_adjust_cfa_offset (-160) + lmg %r6,15,48(%r15) /* Load registers. */ + + lghi %r0,-4095 + clgr %r2,%r0 /* Check R2 for error. */ + jgnl SYSCALL_ERROR_LABEL + br %r14 /* Return to caller. */ +4: .quad 256 +PSEUDO_END (syscall) + |