1 files changed, 65 insertions, 0 deletions
diff --git a/pkg/abi/linux/seccomp.go b/pkg/abi/linux/seccomp.go
new file mode 100644
index 000000000..4eeb5cd7a
--- /dev/null
+++ b/pkg/abi/linux/seccomp.go
@@ -0,0 +1,65 @@
+// 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.
+
+package linux
+
+import "fmt"
+
+// Seccomp constants taken from <linux/seccomp.h>.
+const (
+	SECCOMP_MODE_NONE   = 0
+	SECCOMP_MODE_FILTER = 2
+
+	SECCOMP_RET_ACTION_FULL = 0xffff0000
+	SECCOMP_RET_ACTION      = 0x7fff0000
+	SECCOMP_RET_DATA        = 0x0000ffff
+
+	SECCOMP_SET_MODE_FILTER   = 1
+	SECCOMP_FILTER_FLAG_TSYNC = 1
+	SECCOMP_GET_ACTION_AVAIL  = 2
+)
+
+type BPFAction uint32
+
+const (
+	SECCOMP_RET_KILL_PROCESS BPFAction = 0x80000000
+	SECCOMP_RET_KILL_THREAD            = 0x00000000
+	SECCOMP_RET_TRAP                   = 0x00030000
+	SECCOMP_RET_ERRNO                  = 0x00050000
+	SECCOMP_RET_TRACE                  = 0x7ff00000
+	SECCOMP_RET_ALLOW                  = 0x7fff0000
+)
+
+func (a BPFAction) String() string {
+	switch a & SECCOMP_RET_ACTION_FULL {
+	case SECCOMP_RET_KILL_PROCESS:
+		return "kill process"
+	case SECCOMP_RET_KILL_THREAD:
+		return "kill thread"
+	case SECCOMP_RET_TRAP:
+		return fmt.Sprintf("trap (%d)", a.Data())
+	case SECCOMP_RET_ERRNO:
+		return fmt.Sprintf("errno (%d)", a.Data())
+	case SECCOMP_RET_TRACE:
+		return fmt.Sprintf("trace (%d)", a.Data())
+	case SECCOMP_RET_ALLOW:
+		return "allow"
+	}
+	return fmt.Sprintf("invalid action: %#x", a)
+}
+
+// Data returns the SECCOMP_RET_DATA portion of the action.
+func (a BPFAction) Data() uint16 {
+	return uint16(a & SECCOMP_RET_DATA)
+}