github.com/metacubex/gvisor@v0.0.0-20240320004321-933faba989ec/pkg/sentry/platform/systrap/systrap_amd64.go (about)

     1  // Copyright 2019 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  package systrap
    16  
    17  import (
    18  	"github.com/metacubex/gvisor/pkg/sentry/arch"
    19  )
    20  
    21  func stackPointer(r *arch.Registers) uintptr {
    22  	return uintptr(r.Rsp)
    23  }
    24  
    25  // x86 use the fs_base register to store the TLS pointer which can be
    26  // get/set in "func (t *thread) get/setRegs(regs *arch.Registers)".
    27  // So both of the get/setTLS() operations are noop here.
    28  
    29  // getTLS gets the thread local storage register.
    30  func (t *thread) getTLS(tls *uint64) error {
    31  	return nil
    32  }
    33  
    34  // setTLS sets the thread local storage register.
    35  func (t *thread) setTLS(tls *uint64) error {
    36  	return nil
    37  }