| // Copyright 2020 The gVisor Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // +build race |
| // +build amd64 |
| |
| #include "textflag.h" |
| |
| // func RaceUncheckedAtomicCompareAndSwapUintptr(ptr *uintptr, old, new uintptr) bool |
| TEXT ·RaceUncheckedAtomicCompareAndSwapUintptr(SB),NOSPLIT,$0-25 |
| MOVQ ptr+0(FP), DI |
| MOVQ old+8(FP), AX |
| MOVQ new+16(FP), SI |
| |
| LOCK |
| CMPXCHGQ SI, 0(DI) |
| |
| SETEQ AX |
| MOVB AX, ret+24(FP) |
| |
| RET |
| |
