Check in gVisor.

PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463

1 files changed, 47 insertions, 0 deletions

diff --git a/pkg/sentry/loader/vdso_state.go b/pkg/sentry/loader/vdso_state.go
new file mode 100644
index 000000000..92004ad9e
--- /dev/null
+++ b/pkg/sentry/loader/vdso_state.go
@@ -0,0 +1,47 @@
+// Copyright 2018 Google Inc.
+//
+// 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 loader
+
+import (
+	"debug/elf"
+)
+
+type elfProgHeader struct {
+	Type   elf.ProgType
+	Flags  elf.ProgFlag
+	Off    uint64
+	Vaddr  uint64
+	Paddr  uint64
+	Filesz uint64
+	Memsz  uint64
+	Align  uint64
+}
+
+// savePhdrs is invoked by stateify.
+func (v *VDSO) savePhdrs() []elfProgHeader {
+	s := make([]elfProgHeader, 0, len(v.phdrs))
+	for _, h := range v.phdrs {
+		s = append(s, elfProgHeader(h))
+	}
+	return s
+}
+
+// loadPhdrs is invoked by stateify.
+func (v *VDSO) loadPhdrs(s []elfProgHeader) {
+	v.phdrs = make([]elf.ProgHeader, 0, len(s))
+	for _, h := range s {
+		v.phdrs = append(v.phdrs, elf.ProgHeader(h))
+	}
+}