github.com/metacubex/gvisor@v0.0.0-20240320004321-933faba989ec/pkg/sync/fence_amd64.s (about) 1 // Copyright 2023 The gVisor Authors. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 //go:build amd64 16 // +build amd64 17 18 #include "textflag.h" 19 20 // func MemoryFenceReads() 21 TEXT ·MemoryFenceReads(SB),NOSPLIT|NOFRAME,$0-0 22 // No memory fence is required on x86. However, a compiler fence is 23 // required to prevent the compiler from reordering memory accesses. The Go 24 // compiler will not reorder memory accesses around a call to an assembly 25 // function; compare runtime.publicationBarrier. 26 RET