6 files changed, 20 insertions, 71 deletions
diff --git a/runsc/boot/boot_amd64_state_autogen.go b/runsc/boot/boot_amd64_state_autogen.go
index 4b7a38bb8..23dd4b7b3 100755
--- a/runsc/boot/boot_amd64_state_autogen.go
+++ b/runsc/boot/boot_amd64_state_autogen.go
@@ -1,5 +1,3 @@
 // automatically generated by stateify.
 
-// +build amd64
-
 package boot
diff --git a/runsc/boot/boot_arm64_state_autogen.go b/runsc/boot/boot_arm64_state_autogen.go
index b94cf6df2..23dd4b7b3 100755
--- a/runsc/boot/boot_arm64_state_autogen.go
+++ b/runsc/boot/boot_arm64_state_autogen.go
@@ -1,5 +1,3 @@
 // automatically generated by stateify.
 
-// +build arm64
-
 package boot
diff --git a/runsc/boot/loader.go b/runsc/boot/loader.go
index 79ef3a880..8c8bad11c 100644
--- a/runsc/boot/loader.go
+++ b/runsc/boot/loader.go
@@ -77,8 +77,6 @@ import (
 	_ "gvisor.dev/gvisor/pkg/sentry/socket/unix"
 )
 
-var syscallTable *kernel.SyscallTable
-
 // Loader keeps state needed to start the kernel and run the container..
 type Loader struct {
 	// k is the kernel.
@@ -204,14 +202,12 @@ func New(args Args) (*Loader, error) {
 		return nil, fmt.Errorf("setting up memory usage: %v", err)
 	}
 
-	// Patch the syscall table.
-	kernel.VFS2Enabled = args.Conf.VFS2
-	if kernel.VFS2Enabled {
-		vfs2.Override(syscallTable.Table)
+	// Is this a VFSv2 kernel?
+	if args.Conf.VFS2 {
+		kernel.VFS2Enabled = true
+		vfs2.Override()
 	}
 
-	kernel.RegisterSyscallTable(syscallTable)
-
 	// Create kernel and platform.
 	p, err := createPlatform(args.Conf, args.Device)
 	if err != nil {
diff --git a/runsc/boot/loader_amd64.go b/runsc/boot/loader_amd64.go
deleted file mode 100755
index 78df86611..000000000
--- a/runsc/boot/loader_amd64.go
+++ /dev/null
@@ -1,26 +0,0 @@
-// 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.
-
-// +build amd64
-
-package boot
-
-import (
-	"gvisor.dev/gvisor/pkg/sentry/syscalls/linux"
-)
-
-func init() {
-	// Set the global syscall table.
-	syscallTable = linux.AMD64
-}
diff --git a/runsc/boot/loader_arm64.go b/runsc/boot/loader_arm64.go
deleted file mode 100755
index 250785010..000000000
--- a/runsc/boot/loader_arm64.go
+++ /dev/null
@@ -1,26 +0,0 @@
-// 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.
-
-// +build arm64
-
-package boot
-
-import (
-	"gvisor.dev/gvisor/pkg/sentry/syscalls/linux"
-)
-
-func init() {
-	// Set the global syscall table.
-	syscallTable = linux.ARM64
-}
diff --git a/runsc/cmd/syscalls.go b/runsc/cmd/syscalls.go
index 7072547be..a37d66139 100644
--- a/runsc/cmd/syscalls.go
+++ b/runsc/cmd/syscalls.go
@@ -32,9 +32,10 @@ import (
 
 // Syscalls implements subcommands.Command for the "syscalls" command.
 type Syscalls struct {
-	output string
-	os     string
-	arch   string
+	format   string
+	os       string
+	arch     string
+	filename string
 }
 
 // CompatibilityInfo is a map of system and architecture to compatibility doc.
@@ -95,16 +96,17 @@ func (*Syscalls) Usage() string {
 
 // SetFlags implements subcommands.Command.SetFlags.
 func (s *Syscalls) SetFlags(f *flag.FlagSet) {
-	f.StringVar(&s.output, "o", "table", "Output format (table, csv, json).")
+	f.StringVar(&s.format, "format", "table", "Output format (table, csv, json).")
 	f.StringVar(&s.os, "os", osAll, "The OS (e.g. linux)")
 	f.StringVar(&s.arch, "arch", archAll, "The CPU architecture (e.g. amd64).")
+	f.StringVar(&s.filename, "filename", "", "Output filename (otherwise stdout).")
 }
 
 // Execute implements subcommands.Command.Execute.
 func (s *Syscalls) Execute(_ context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus {
-	out, ok := outputMap[s.output]
+	out, ok := outputMap[s.format]
 	if !ok {
-		Fatalf("Unsupported output format %q", s.output)
+		Fatalf("Unsupported output format %q", s.format)
 	}
 
 	// Build map of all supported architectures.
@@ -124,7 +126,14 @@ func (s *Syscalls) Execute(_ context.Context, f *flag.FlagSet, args ...interface
 		Fatalf("%v", err)
 	}
 
-	if err := out(os.Stdout, info); err != nil {
+	w := os.Stdout // Default.
+	if s.filename != "" {
+		w, err = os.OpenFile(s.filename, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644)
+		if err != nil {
+			Fatalf("Error opening %q: %v", s.filename, err)
+		}
+	}
+	if err := out(w, info); err != nil {
 		Fatalf("Error writing output: %v", err)
 	}