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/* Copyright (C) 2000, 2001, 2007 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>
#include <kernel-features.h>
#define EINVAL 22
.text
ENTRY(__mmap)
/* Save registers and setup stack frame. */
stm %r6,%r15,24(%r15)
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
ahi %r15,-120 /* buy stack space */
cfi_adjust_cfa_offset (120)
st %r1,0(%r15) /* store back chain */
/* Store parameters on stack, because old_mmap/mmap2
* 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'. */
l %r1,216(%r15) /* Load offset. */
#ifdef __ASSUME_MMAP2_SYSCALL
/* I don't think it is worthwhile trying to use mmap2 whenever
* it is available. Only use it when we are sure the syscall
* exists. */
tml %r1,0x0fff /* Offset page aligned ? */
lhi %r2,-EINVAL
jnz 1f /* No -> EINVAL. */
srl %r1,12 /* mmap2 takes the offset in pages. */
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. */
#else
st %r1,0x74(%r15) /* Store offset unmodified. */
la %r2,0x60(%r15) /* Load address of parameter list. */
svc SYS_ify(mmap) /* Do the system call trap. */
#endif
1: l %r15,0(%r15) /* Load back chain. */
cfi_adjust_cfa_offset (-120)
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)
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