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/* 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>
#define EINVAL 22
#define ENOSYS 38
.text
ENTRY(__mmap64)
/* Save registers and setup stack frame. */
stm %r6,%r15,24(%r15)
lr %r1,%r15
ahi %r15,-120 /* Buy stack space. */
st %r1,0(%r15) /* Store back chain. */
/* Store parameters on stack, because mmap2 and old_mmap
* take only one parameter: a pointer to the parameter area. */
st %r6,0x70(%r15) /* Store 'fd'. */
st %r5,0x6C(%r15) /* Store 'flags'. */
st %r4,0x68(%r15) /* Store 'prot'. */
st %r3,0x64(%r15) /* Store 'length'. */
st %r2,0x60(%r15) /* Store 'start'. */
#ifdef __NR_mmap2
lm %r0,%r1,216(%r15) /* Load 64 bit offset. */
tml %r1,0x0fff /* Offset page aligned ? */
jnz 2f /* No -> EINVAL. */
srdl %r0,12 /* mmap2 takes the offset in pages. */
ltr %r0,%r0 /* Offset > 2^44 ? */
jnz 2f
st %r1,0x74(%r15) /* Store page offset. */
la %r2,0x60(%r15) /* Load address of parameter list. */
svc SYS_ify(mmap2) /* Do the system call trap. */
#ifndef __ASSUME_MMAP2_SYSCALL
chi %r0,-ENOSYS
je 1f
#endif
l %r15,0(%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
#endif
#if !defined __ASSUME_MMAP2_SYSCALL || !defined __NR_mmap2
1: lm %r0,%r1,216(%r15) /* Load 64 bit offset. */
st %r1,0x74(%r15) /* Store lower word of offset. */
ltr %r0,%r0 /* Offset > 2^32 ? */
jnz 2f
alr %r1,%r3 /* Add length to offset. */
brc 3,2f /* Carry -> EINVAL. */
la %r2,0x60(%r15) /* Load address of parameter list. */
svc SYS_ify(mmap) /* Do the system call trap. */
l %r15,0(%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
#endif
2: lhi %r2,-EINVAL
l %r15,0(%r15) /* Load back chain. */
lm %r6,%r15,24(%r15) /* Load registers. */
j SYSCALL_ERROR_LABEL
PSEUDO_END (__mmap64)
weak_alias (__mmap64, mmap64)
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