| Raghu Gandham | 405b802 | 2012-07-25 18:16:42 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <asm/unistd.h> |
| 30 | |
| 31 | #define FUTEX_WAIT 0 |
| 32 | #define FUTEX_WAKE 1 |
| 33 | |
| 34 | /* |
| 35 | * __futex_wait(*ftx, val, *timespec) |
| 36 | * futex_syscall(*ftx, op, val, *timespec, *addr2, val3) |
| 37 | */ |
| 38 | .type __futex_wait, @function |
| 39 | .global __futex_wait |
| 40 | .align 4 |
| 41 | .ent __futex_wait |
| 42 | __futex_wait: |
| 43 | subu $sp,4*6 |
| 44 | sw $0,20($sp) /* val3 */ |
| 45 | sw $0,16($sp) /* addr2 */ |
| 46 | move $a3,$a2 /* timespec */ |
| 47 | move $a2,$a1 /* val */ |
| 48 | li $a1,FUTEX_WAIT /* op */ |
| 49 | # move $a0,$a0 /* ftx */ |
| 50 | li $v0,__NR_futex |
| 51 | syscall |
| 52 | .set noreorder |
| 53 | bnez $a3, 1f /* Check for error */ |
| 54 | neg $v0 /* Negate error number if it's valid */ |
| 55 | move $v0,$0 /* Otherwise return 0 */ |
| 56 | 1: |
| 57 | .set reorder |
| 58 | addu $sp,4*6 |
| 59 | j $ra |
| 60 | .end __futex_wait |
| 61 | |
| 62 | /* |
| 63 | * int __futex_wake(volatile void *ftx, int count) |
| 64 | * int futex_syscall(*ftx, op, val, *timespec, *addr2, val3) |
| 65 | */ |
| 66 | .type __futex_wake, @function |
| 67 | .globl __futex_wake |
| 68 | .align 4 |
| 69 | .ent __futex_wake |
| 70 | __futex_wake: |
| 71 | subu $sp,4*6 |
| 72 | sw $0,20($sp) /* val3 */ |
| 73 | sw $0,16($sp) /* addr2 */ |
| 74 | move $a3,$0 /* timespec */ |
| 75 | move $a2,$a1 /* val */ |
| 76 | li $a1,FUTEX_WAKE /* op */ |
| 77 | # move $a0,$a0 /* ftx */ |
| 78 | li $v0,__NR_futex |
| 79 | syscall |
| 80 | .set noreorder |
| 81 | bnez $a3, 1f /* Check for error */ |
| 82 | neg $v0 /* Negate error number if it's valid */ |
| 83 | move $v0,$0 /* Otherwise return 0 */ |
| 84 | 1: |
| 85 | .set reorder |
| 86 | addu $sp,4*6 |
| 87 | j $ra |
| 88 | .end __futex_wake |
| 89 | |
| 90 | /* __futex_syscall3(*ftx, op, val) |
| 91 | * futex_syscall(*ftx, op, val, *timespec, *addr2, val3) |
| 92 | */ |
| 93 | .type __futex_syscall3, @function |
| 94 | .global __futex_syscall3 |
| 95 | .align 4 |
| 96 | .ent __futex_syscall3 |
| 97 | __futex_syscall3: |
| 98 | subu $sp,4*6 |
| 99 | sw $0,20($sp) /* val3 */ |
| 100 | sw $0,16($sp) /* addr2 */ |
| 101 | move $a3,$0 /* timespec */ |
| 102 | # move $a2,$a2 /* val */ |
| 103 | # li $a1,$a1 /* op */ |
| 104 | # move $a0,$a0 /* ftx */ |
| 105 | li $v0,__NR_futex |
| 106 | syscall |
| 107 | .set noreorder |
| 108 | bnez $a3, 1f /* Check for error */ |
| 109 | neg $v0 /* Negate error number if it's valid */ |
| 110 | move $v0,$0 /* Otherwise return 0 */ |
| 111 | 1: |
| 112 | .set reorder |
| 113 | addu $sp,4*6 |
| 114 | j $ra |
| 115 | .end __futex_syscall3 |
| 116 | |
| 117 | /* __futex_syscall4(*ftx, op, val) |
| 118 | * futex_syscall(*ftx, op, val, *timespec, *addr2, val3) |
| 119 | */ |
| 120 | .type __futex_syscall4, @function |
| 121 | .global __futex_syscall4 |
| 122 | .align 4 |
| 123 | .ent __futex_syscall4 |
| 124 | __futex_syscall4: |
| 125 | subu $sp,4*6 |
| 126 | sw $0,20($sp) /* val3 */ |
| 127 | sw $0,16($sp) /* addr2 */ |
| 128 | # move $a3,$a3 /* timespec */ |
| 129 | # move $a2,$a2 /* val */ |
| 130 | # li $a1,$a1 /* op */ |
| 131 | # move $a0,$a0 /* ftx */ |
| 132 | li $v0,__NR_futex |
| 133 | syscall |
| 134 | .set noreorder |
| 135 | bnez $a3, 1f /* Check for error */ |
| 136 | neg $v0 /* Negate error number if it's valid */ |
| 137 | move $v0,$0 /* Otherwise return 0 */ |
| 138 | 1: |
| 139 | .set reorder |
| 140 | addu $sp,4*6 |
| 141 | j $ra |
| 142 | .end __futex_syscall4 |