diff options
Diffstat (limited to 'libc/arch-arm/bionic/atomics_arm.S')
| -rw-r--r-- | libc/arch-arm/bionic/atomics_arm.S | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/libc/arch-arm/bionic/atomics_arm.S b/libc/arch-arm/bionic/atomics_arm.S deleted file mode 100644 index b2da09f..0000000 --- a/libc/arch-arm/bionic/atomics_arm.S +++ /dev/null @@ -1,178 +0,0 @@ -/* - * 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> - -.global __atomic_cmpxchg -.global __atomic_swap -.global __atomic_dec -.global __atomic_inc -.global __futex_wait -.global __futex_wake - -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 - -#if 1 - .equ kernel_cmpxchg, 0xFFFF0FC0 - .equ kernel_atomic_base, 0xFFFF0FFF -__atomic_dec: - stmdb sp!, {r4, lr} - mov r2, r0 -1: @ atomic_dec - ldr r0, [r2] - mov r3, #kernel_atomic_base - add lr, pc, #4 - sub r1, r0, #1 - add pc, r3, #(kernel_cmpxchg - kernel_atomic_base) - bcc 1b - add r0, r1, #1 - ldmia sp!, {r4, lr} - bx lr - -__atomic_inc: - stmdb sp!, {r4, lr} - mov r2, r0 -1: @ atomic_inc - ldr r0, [r2] - mov r3, #kernel_atomic_base - add lr, pc, #4 - add r1, r0, #1 - add pc, r3, #(kernel_cmpxchg - kernel_atomic_base) - bcc 1b - sub r0, r1, #1 - ldmia sp!, {r4, lr} - bx lr - -/* r0(old) r1(new) r2(addr) -> r0(zero_if_succeeded) */ -__atomic_cmpxchg: - stmdb sp!, {r4, lr} - mov r4, r0 /* r4 = save oldvalue */ -1: @ atomic_cmpxchg - mov r3, #kernel_atomic_base - add lr, pc, #4 - mov r0, r4 /* r0 = oldvalue */ - add pc, r3, #(kernel_cmpxchg - kernel_atomic_base) - bcs 2f /* swap was made. we're good, return. */ - ldr r3, [r2] /* swap not made, see if it's because *ptr!=oldvalue */ - cmp r3, r4 - beq 1b -2: @ atomic_cmpxchg - ldmia sp!, {r4, lr} - bx lr -#else -#define KUSER_CMPXCHG 0xffffffc0 - -/* r0(old) r1(new) r2(addr) -> r0(zero_if_succeeded) */ -__atomic_cmpxchg: - stmdb sp!, {r4, lr} - mov r4, r0 /* r4 = save oldvalue */ -1: add lr, pc, #4 - mov r0, r4 /* r0 = oldvalue */ - mov pc, #KUSER_CMPXCHG - bcs 2f /* swap was made. we're good, return. */ - ldr r3, [r2] /* swap not made, see if it's because *ptr!=oldvalue */ - cmp r3, r4 - beq 1b -2: ldmia sp!, {r4, lr} - bx lr - -/* r0(addr) -> r0(old) */ -__atomic_dec: - stmdb sp!, {r4, lr} - mov r2, r0 /* address */ -1: ldr r0, [r2] /* oldvalue */ - add lr, pc, #4 - sub r1, r0, #1 /* newvalue = oldvalue - 1 */ - mov pc, #KUSER_CMPXCHG - bcc 1b /* no swap, try again until we get it right */ - mov r0, ip /* swapped, return the old value */ - ldmia sp!, {r4, lr} - bx lr - -/* r0(addr) -> r0(old) */ -__atomic_inc: - stmdb sp!, {r4, lr} - mov r2, r0 /* address */ -1: ldr r0, [r2] /* oldvalue */ - add lr, pc, #4 - add r1, r0, #1 /* newvalue = oldvalue + 1 */ - mov pc, #KUSER_CMPXCHG - bcc 1b /* no swap, try again until we get it right */ - mov r0, ip /* swapped, return the old value */ - ldmia sp!, {r4, lr} - bx lr -#endif - -/* r0(new) r1(addr) -> r0(old) */ -__atomic_swap: - swp r0, r0, [r1] - bx lr - -/* __futex_wait(*ftx, val, *timespec) */ -/* __futex_syscall(*ftx, op, val, *timespec, *addr2, val3) */ - -#if __ARM_EABI__ - -__futex_wait: - .fnstart - 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 - .fnend - -__futex_wake: - stmdb sp!, {r4, r7} - mov r2, r1 - mov r1, #FUTEX_WAKE - ldr r7, =__NR_futex - swi #0 - ldmia sp!, {r4, r7} - bx lr - -#else - -__futex_wait: - mov r3, r2 - mov r2, r1 - mov r1, #FUTEX_WAIT - swi #__NR_futex - bx lr - -__futex_wake: - mov r2, r1 - mov r1, #FUTEX_WAKE - swi #__NR_futex - bx lr - -#endif |