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 143
