github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/procid/procid_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  // +build amd64
    16  // +build go1.8
    17  // +build !go1.18
    18  
    19  #include "textflag.h"
    20  
    21  TEXT ·Current(SB),NOSPLIT,$0-8
    22  	// The offset specified here is the m_procid offset for Go1.8+.
    23  	// Changes to this offset should be caught by the tests, and major
    24  	// version changes require an explicit tag change above.
    25  	MOVQ TLS, AX
    26  	MOVQ 0(AX)(TLS*1), AX
    27  	MOVQ 48(AX), AX // g_m (may change in future versions)
    28  	MOVQ 72(AX), AX // m_procid (may change in future versions)
    29  	MOVQ AX, ret+0(FP)
    30  	RET