da4a3e6515
We cleaned up the auto-generated ones a while back to not touch the stack unnecessarily if they have <= 4 arguments. This patch cleans up some hand-crafted ones. Also improve comments in clone.S. Change-Id: I8850bf98f2b26829385315304472a760e6880ed8
70 lines
2.2 KiB
ArmAsm
70 lines
2.2 KiB
ArmAsm
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <asm/unistd.h>
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#include <machine/asm.h>
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#define FUTEX_WAIT 0
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#define FUTEX_WAKE 1
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// __futex_syscall3(*ftx, op, val)
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ENTRY(__futex_syscall3)
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mov ip, r7
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ldr r7, =__NR_futex
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swi #0
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mov r7, ip
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bx lr
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END(__futex_syscall3)
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// __futex_syscall4(*ftx, op, val, *timespec)
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ENTRY(__futex_syscall4)
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b __futex_syscall3
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END(__futex_syscall4)
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// __futex_wait(*ftx, val, *timespec)
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ENTRY(__futex_wait)
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mov ip, r7
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mov r3, r2
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mov r2, r1
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mov r1, #FUTEX_WAIT
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ldr r7, =__NR_futex
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swi #0
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mov r7, ip
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bx lr
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END(__futex_wait)
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// __futex_wake(*ftx, counter)
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ENTRY(__futex_wake)
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mov ip, r7
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mov r2, r1
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mov r1, #FUTEX_WAKE
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ldr r7, =__NR_futex
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swi #0
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mov r7, ip
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bx lr
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END(__futex_wake)
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