github.com/nicocha30/gvisor-ligolo@v0.0.0-20230726075806-989fa2c0a413/pkg/hosttid/hosttid_amd64.s (about)

     1  // Copyright 2018 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  #define M_OFFSET       48 // +checkoffset runtime g.m
    21  #define PROCID_OFFSET  72 // +checkoffset runtime m.procid
    22  
    23  TEXT ·Current(SB),NOSPLIT|NOFRAME,$0-8
    24  	// procid is in getg().m.procid.
    25  	MOVQ TLS, AX
    26  	MOVQ 0(AX)(TLS*1), AX
    27  	MOVQ M_OFFSET(AX), AX // gp.m
    28  	MOVQ PROCID_OFFSET(AX), AX // mp.procid
    29  	MOVQ AX, ret+0(FP)
    30  	RET