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// Copyright 2018 The gVisor Authors.
//
// 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 arch
import "gvisor.dev/gvisor/pkg/marshal"
// Special values for SignalAct.Handler.
const (
// SignalActDefault is SIG_DFL and specifies that the default behavior for
// a signal should be taken.
SignalActDefault = 0
// SignalActIgnore is SIG_IGN and specifies that a signal should be
// ignored.
SignalActIgnore = 1
)
// Available signal flags.
const (
SignalFlagNoCldStop = 0x00000001
SignalFlagNoCldWait = 0x00000002
SignalFlagSigInfo = 0x00000004
SignalFlagRestorer = 0x04000000
SignalFlagOnStack = 0x08000000
SignalFlagRestart = 0x10000000
SignalFlagInterrupt = 0x20000000
SignalFlagNoDefer = 0x40000000
SignalFlagResetHandler = 0x80000000
)
// IsSigInfo returns true iff this handle expects siginfo.
func (s SignalAct) IsSigInfo() bool {
return s.Flags&SignalFlagSigInfo != 0
}
// IsNoDefer returns true iff this SignalAct has the NoDefer flag set.
func (s SignalAct) IsNoDefer() bool {
return s.Flags&SignalFlagNoDefer != 0
}
// IsRestart returns true iff this SignalAct has the Restart flag set.
func (s SignalAct) IsRestart() bool {
return s.Flags&SignalFlagRestart != 0
}
// IsResetHandler returns true iff this SignalAct has the ResetHandler flag set.
func (s SignalAct) IsResetHandler() bool {
return s.Flags&SignalFlagResetHandler != 0
}
// IsOnStack returns true iff this SignalAct has the OnStack flag set.
func (s SignalAct) IsOnStack() bool {
return s.Flags&SignalFlagOnStack != 0
}
// HasRestorer returns true iff this SignalAct has the Restorer flag set.
func (s SignalAct) HasRestorer() bool {
return s.Flags&SignalFlagRestorer != 0
}
// NativeSignalAct is a type that is equivalent to struct sigaction in the
// guest architecture.
type NativeSignalAct interface {
marshal.Marshallable
// SerializeFrom copies the data in the host SignalAct s into this object.
SerializeFrom(s *SignalAct)
// DeserializeTo copies the data in this object into the host SignalAct s.
DeserializeTo(s *SignalAct)
}
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