pkg/host: explain why syscalls are disabled

1 files changed, 27 insertions, 0 deletions

diff --git a/pkg/host/host.go b/pkg/host/host.go
new file mode 100644
index 000000000..f3acd05d9
--- /dev/null
+++ b/pkg/host/host.go
@@ -0,0 +1,27 @@
+// Copyright 2018 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package host
+
+import (
+	"github.com/google/syzkaller/prog"
+)
+
+// DetectSupportedSyscalls returns list on supported and unsupported syscalls on the host.
+// For unsupported syscalls it also returns reason as to why it is unsupported.
+func DetectSupportedSyscalls(target *prog.Target, sandbox string) (map[*prog.Syscall]bool, map[*prog.Syscall]string, error) {
+	supported := make(map[*prog.Syscall]bool)
+	unsupported := make(map[*prog.Syscall]string)
+	for _, c := range target.Syscalls {
+		ok, reason := isSupported(c, sandbox)
+		if ok {
+			supported[c] = true
+		} else {
+			if reason == "" {
+				reason = "unknown"
+			}
+			unsupported[c] = reason
+		}
+	}
+	return supported, unsupported, nil
+}