diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/mmap.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/mmap.S | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/mmap.S b/sysdeps/unix/sysv/linux/s390/mmap.S new file mode 100644 index 0000000000..0ba58ccf82 --- /dev/null +++ b/sysdeps/unix/sysv/linux/s390/mmap.S @@ -0,0 +1,60 @@ +/* Copyright (C) 2000 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> + + .text + +ENTRY(__mmap) + /* Save registers and setup stack frame. */ + stm %r6,%r15,24(%r15) + lr %r1,%r15 + l %r0,4(0,%r15) /* load eos */ + ahi %r15,-120 /* buy stack space */ + st %r1,0(0,%r15) /* store back chain */ + st %r0,4(0,%r15) /* store eos */ + + /* Store parameters on stack, because old_mmap + * takes only one parameter: a pointer to the parameter area + */ + mvc 0x74(4,%r15),216(%r15) /* move 'offset' */ + st %r6,0x70(0,%r15) /* store 'fd' */ + st %r5,0x6C(0,%r15) /* store 'flags' */ + st %r4,0x68(0,%r15) /* store 'prot' */ + st %r3,0x64(0,%r15) /* store 'length' */ + st %r2,0x60(0,%r15) /* store 'start' */ + + la %r2,0x60(0,%r15) /* load address of parameter list */ + /* Do the system call trap. */ + svc SYS_ify(mmap) + + l %r15,0(0,%r15) /* load back chain */ + lm %r6,%r15,24(%r15) /* load registers */ + + /* check gpr 2 for error */ + lhi %r0,-4096 + clr %r2,%r0 + jnl SYSCALL_ERROR_LABEL + + /* Successful; return the syscall's value. */ + br %r14 + +PSEUDO_END (__mmap) + +weak_alias (__mmap, mmap) |