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/* Copyright (C) 2000 Free Software Foundation, Inc.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#define _ERRNO_H 1
#include <features.h>
#include <bits/errno.h>
#include <sys/syscall.h>
#if defined __UCLIBC_HAS_LFS__ && defined __NR_mmap2
/* The mmap2 system call takes six arguments, all in registers. */
.text
.global mmap64;
.type mmap64,%function
.align 4;
mmap64:
stmfd sp!, {r4, r5, lr}
ldr r5, [sp, $16]
ldr r4, [sp, $12]
movs ip, r5, lsl $20 @ check that offset is page-aligned
bne .Linval
ldr ip, [sp, $20]
mov r5, r5, lsr $12
orr r5, r5, ip, lsl $20 @ compose page offset
movs ip, ip, lsr $12
bne .Linval @ check for overflow
mov ip, r0
swi __NR_mmap2
cmn r0, $4096
ldmccfd sp!, {r4, r5, pc}
cmn r0, $ENOSYS
ldmnefd sp!, {r4, r5, lr}
bne __syscall_error (PLT)
/* The current kernel does not support mmap2. Fall back to plain
mmap if the offset is small enough. */
ldr r5, [sp, $20]
mov r0, ip @ first arg was clobbered
teq r5, $0
ldmeqfd sp!, {r4, r5, lr}
beq mmap (PLT)
.Linval:
mov r0, $-EINVAL
ldmfd sp!, {r4, r5, lr}
b __syscall_error (PLT)
__syscall_error:
/* Looks like the syscall choked -- set errno */
ldr r3, .L4
/* Calculate the - of the syscall result, in case we need it */
rsb r2, r0, $0
/* errno = -result */
str r2, [r9,r3]
/* return -1 */
mvn r0, $0
mov pc, lr
.size mmap64,.-mmap64;
.L4: .word errno
#endif
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