diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-64/mmap.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/mmap.S | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/mmap.S b/sysdeps/unix/sysv/linux/s390/s390-64/mmap.S new file mode 100644 index 0000000000..72d73d4416 --- /dev/null +++ b/sysdeps/unix/sysv/linux/s390/s390-64/mmap.S @@ -0,0 +1,67 @@ +/* Wrapper around mmap system call. 64 bit S/390 version. + 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sysdep.h> + +#define EINVAL 22 + + .text + +ENTRY(__mmap) + /* Save registers and setup stack frame. */ + stmg %r6,%r15,48(%r15) + lgr %r1,%r15 + lg %r0,8(%r15) /* Load eos. */ + aghi %r15,-208 /* Buy stack space. */ + stg %r1,0(%r15) /* Store back chain. */ + stg %r0,8(%r15) /* Store eos. */ + + /* Store parameters on stack, because old_mmap + takes only one parameter: a pointer to the parameter area. */ + mvc 200(8,%r15),368(%r15) /* Move 'offset'. */ + lgfr %r6,%r6 + stg %r6,192(%r15) /* Store 'fd'. */ + lgfr %r5,%r5 + stg %r5,184(%r15) /* Store 'flags'. */ + lgfr %r4,%r4 + stg %r4,176(%r15) /* Store 'prot'. */ + stg %r3,168(%r15) /* Store 'length'. */ + stg %r2,160(%r15) /* Store 'start'. */ + + la %r2,160(%r15) /* Load address of parameter list. */ + /* Do the system call trap. */ + svc SYS_ify(mmap) + + lg %r15,0(%r15) /* Load back chain. */ + lmg %r6,%r15,48(%r15) /* Load registers. */ + + /* Check gpr 2 for error. */ + lghi %r0,-4096 + clgr %r2,%r0 + jnl SYSCALL_ERROR_LABEL + + /* Successful; return the syscall's value. */ + br %r14 + +PSEUDO_END (__mmap) + +weak_alias (__mmap, mmap) +weak_alias (__mmap, mmap64) + |