Merge release-20200907.0-56-gdcd532e2e (automated)

1 files changed, 10 insertions, 0 deletions

diff --git a/pkg/sentry/kernel/syscalls.go b/pkg/sentry/kernel/syscalls.go
index 413111faf..332bdb8e8 100644
--- a/pkg/sentry/kernel/syscalls.go
+++ b/pkg/sentry/kernel/syscalls.go
@@ -348,6 +348,16 @@ func (s *SyscallTable) LookupName(sysno uintptr) string {
 	return fmt.Sprintf("sys_%d", sysno) // Unlikely.
 }
 
+// LookupNo looks up a syscall number by name.
+func (s *SyscallTable) LookupNo(name string) (uintptr, error) {
+	for i, syscall := range s.Table {
+		if syscall.Name == name {
+			return uintptr(i), nil
+		}
+	}
+	return 0, fmt.Errorf("syscall %q not found", name)
+}
+
 // LookupEmulate looks up an emulation syscall number.
 func (s *SyscallTable) LookupEmulate(addr usermem.Addr) (uintptr, bool) {
 	sysno, ok := s.Emulate[addr]