add arch-specific feature into mm

Signed-off-by: Bin Lu <bin.lu@arm.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/pkg/sentry/mm/metadata.go b/pkg/sentry/mm/metadata.go
index 6a49334f4..28e5057f7 100644
--- a/pkg/sentry/mm/metadata.go
+++ b/pkg/sentry/mm/metadata.go
@@ -167,3 +167,17 @@ func (mm *MemoryManager) SetExecutable(file fsbridge.File) {
 		orig.DecRef()
 	}
 }
+
+// VDSOSigReturn returns the address of vdso_sigreturn.
+func (mm *MemoryManager) VDSOSigReturn() uint64 {
+	mm.metadataMu.Lock()
+	defer mm.metadataMu.Unlock()
+	return mm.vdsoSigReturnAddr
+}
+
+// SetVDSOSigReturn sets the address of vdso_sigreturn.
+func (mm *MemoryManager) SetVDSOSigReturn(addr uint64) {
+	mm.metadataMu.Lock()
+	defer mm.metadataMu.Unlock()
+	mm.vdsoSigReturnAddr = addr
+}