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/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/linux-syscalls.h>
#include <machine/asm.h>
#include <machine/cpu-features.h>
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
/* __futex_wait(*ftx, val, *timespec) */
/* __futex_wake(*ftx, counter) */
/* __futex_syscall3(*ftx, op, val) */
/* __futex_syscall4(*ftx, op, val, *timespec) */
.global __futex_wait
.type __futex_wait, %function
.global __futex_wake
.type __futex_wake, %function
.global __futex_syscall3
.type __futex_syscall3, %function
.global __futex_syscall4
.type __futex_syscall4, %function
#if __ARM_EABI__
ENTRY(__futex_syscall3)
stmdb sp!, {r4, r7}
.save {r4, r7}
ldr r7, =__NR_futex
swi #0
ldmia sp!, {r4, r7}
bx lr
END(__futex_syscall3)
ENTRY(__futex_wait)
stmdb sp!, {r4, r7}
.save {r4, r7}
mov r3, r2
mov r2, r1
mov r1, #FUTEX_WAIT
ldr r7, =__NR_futex
swi #0
ldmia sp!, {r4, r7}
bx lr
END(__futex_wait)
ENTRY(__futex_wake)
.save {r4, r7}
stmdb sp!, {r4, r7}
mov r2, r1
mov r1, #FUTEX_WAKE
ldr r7, =__NR_futex
swi #0
ldmia sp!, {r4, r7}
bx lr
END(__futex_wake)
#else
ENTRY(__futex_syscall3)
swi #__NR_futex
bx lr
END(__futex_syscall3)
ENTRY(__futex_wait)
mov r3, r2
mov r2, r1
mov r1, #FUTEX_WAIT
swi #__NR_futex
bx lr
END(__futex_wait)
ENTRY(__futex_wake)
mov r2, r1
mov r1, #FUTEX_WAKE
swi #__NR_futex
bx lr
END(__futex_wake)
#endif
ENTRY(__futex_syscall4)
b __futex_syscall3
END(__futex_syscall4)
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