Merge pull request #1233 from xiaobo55x:compatLog

PiperOrigin-RevId: 284305935

1 files changed, 91 insertions, 0 deletions

diff --git a/runsc/boot/compat_arm64.go b/runsc/boot/compat_arm64.go
new file mode 100644
index 000000000..f784cd237
--- /dev/null
+++ b/runsc/boot/compat_arm64.go
@@ -0,0 +1,91 @@
+// Copyright 2019 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 boot
+
+import (
+	"fmt"
+
+	"gvisor.dev/gvisor/pkg/abi"
+	"gvisor.dev/gvisor/pkg/sentry/arch"
+	rpb "gvisor.dev/gvisor/pkg/sentry/arch/registers_go_proto"
+	"gvisor.dev/gvisor/pkg/sentry/strace"
+)
+
+// reportLimit is the max number of events that should be reported per tracker.
+const reportLimit = 100
+
+// newRegs create a empty Registers instance.
+func newRegs() *rpb.Registers {
+	return &rpb.Registers{
+		Arch: &rpb.Registers_Arm64{
+			Arm64: &rpb.ARM64Registers{},
+		},
+	}
+}
+
+func argVal(argIdx int, regs *rpb.Registers) uint32 {
+	arm64Regs := regs.GetArch().(*rpb.Registers_Arm64).Arm64
+
+	switch argIdx {
+	case 0:
+		return uint32(arm64Regs.R0)
+	case 1:
+		return uint32(arm64Regs.R1)
+	case 2:
+		return uint32(arm64Regs.R2)
+	case 3:
+		return uint32(arm64Regs.R3)
+	case 4:
+		return uint32(arm64Regs.R4)
+	case 5:
+		return uint32(arm64Regs.R5)
+	}
+	panic(fmt.Sprintf("invalid syscall argument index %d", argIdx))
+}
+
+func setArgVal(argIdx int, argVal uint64, regs *rpb.Registers) {
+	arm64Regs := regs.GetArch().(*rpb.Registers_Arm64).Arm64
+
+	switch argIdx {
+	case 0:
+		arm64Regs.R0 = argVal
+	case 1:
+		arm64Regs.R1 = argVal
+	case 2:
+		arm64Regs.R2 = argVal
+	case 3:
+		arm64Regs.R3 = argVal
+	case 4:
+		arm64Regs.R4 = argVal
+	case 5:
+		arm64Regs.R5 = argVal
+	default:
+		panic(fmt.Sprintf("invalid syscall argument index %d", argIdx))
+	}
+}
+
+func getSyscallNameMap() (strace.SyscallMap, bool) {
+	return strace.Lookup(abi.Linux, arch.ARM64)
+}
+
+func syscallNum(regs *rpb.Registers) uint64 {
+	arm64Regs := regs.GetArch().(*rpb.Registers_Arm64).Arm64
+	return arm64Regs.R8
+}
+
+func newArchArgsTracker(sysnr uint64) syscallTracker {
+	// currently, no arch specific syscalls need to be handled here.
+	return nil
+}