Merge release-20210601.0-34-ga51fcf22e (automated)

1 files changed, 0 insertions, 68 deletions

diff --git a/pkg/sentry/arch/signal_stack.go b/pkg/sentry/arch/signal_stack.go
deleted file mode 100644
index c732c7503..000000000
--- a/pkg/sentry/arch/signal_stack.go
+++ /dev/null
@@ -1,68 +0,0 @@
-// 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.
-
-// +build 386 amd64 arm64
-
-package arch
-
-import (
-	"gvisor.dev/gvisor/pkg/hostarch"
-	"gvisor.dev/gvisor/pkg/marshal"
-)
-
-const (
-	// SignalStackFlagOnStack is possible set on return from getaltstack,
-	// in order to indicate that the thread is currently on the alt stack.
-	SignalStackFlagOnStack = 1
-
-	// SignalStackFlagDisable is a flag to indicate the stack is disabled.
-	SignalStackFlagDisable = 2
-)
-
-// IsEnabled returns true iff this signal stack is marked as enabled.
-func (s SignalStack) IsEnabled() bool {
-	return s.Flags&SignalStackFlagDisable == 0
-}
-
-// Top returns the stack's top address.
-func (s SignalStack) Top() hostarch.Addr {
-	return hostarch.Addr(s.Addr + s.Size)
-}
-
-// SetOnStack marks this signal stack as in use.
-//
-// Note that there is no corresponding ClearOnStack, and that this should only
-// be called on copies that are serialized to userspace.
-func (s *SignalStack) SetOnStack() {
-	s.Flags |= SignalStackFlagOnStack
-}
-
-// Contains checks if the stack pointer is within this stack.
-func (s *SignalStack) Contains(sp hostarch.Addr) bool {
-	return hostarch.Addr(s.Addr) < sp && sp <= hostarch.Addr(s.Addr+s.Size)
-}
-
-// NativeSignalStack is a type that is equivalent to stack_t in the guest
-// architecture.
-type NativeSignalStack interface {
-	marshal.Marshallable
-
-	// SerializeFrom copies the data in the host SignalStack s into this
-	// object.
-	SerializeFrom(s *SignalStack)
-
-	// DeserializeTo copies the data in this object into the host SignalStack
-	// s.
-	DeserializeTo(s *SignalStack)
-}