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// Copyright 2018 Google LLC
//
// 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.
package kvm
import (
"fmt"
"reflect"
"syscall"
"gvisor.googlesource.com/gvisor/pkg/sentry/platform/safecopy"
)
// bluepill enters guest mode.
func bluepill(*vCPU)
// sighandler is the signal entry point.
func sighandler()
// savedHandler is a pointer to the previous handler.
//
// This is called by bluepillHandler.
var savedHandler uintptr
func init() {
// Install the handler.
if err := safecopy.ReplaceSignalHandler(syscall.SIGSEGV, reflect.ValueOf(sighandler).Pointer(), &savedHandler); err != nil {
panic(fmt.Sprintf("Unable to set handler for signal %d: %v", syscall.SIGSEGV, err))
}
}
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