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-rw-r--r--runsc/boot/BUILD1
-rw-r--r--runsc/boot/compat.go58
-rw-r--r--runsc/boot/compat_amd64.go87
-rw-r--r--runsc/boot/compat_arm64.go96
-rw-r--r--runsc/boot/compat_test.go47
5 files changed, 223 insertions, 66 deletions
diff --git a/runsc/boot/BUILD b/runsc/boot/BUILD
index 847d2f91c..3b6a29c6e 100644
--- a/runsc/boot/BUILD
+++ b/runsc/boot/BUILD
@@ -7,6 +7,7 @@ go_library(
srcs = [
"compat.go",
"compat_amd64.go",
+ "compat_arm64.go",
"config.go",
"controller.go",
"debug.go",
diff --git a/runsc/boot/compat.go b/runsc/boot/compat.go
index 07e35ab10..b7283f56c 100644
--- a/runsc/boot/compat.go
+++ b/runsc/boot/compat.go
@@ -21,10 +21,8 @@ import (
"syscall"
"github.com/golang/protobuf/proto"
- "gvisor.dev/gvisor/pkg/abi"
"gvisor.dev/gvisor/pkg/eventchannel"
"gvisor.dev/gvisor/pkg/log"
- "gvisor.dev/gvisor/pkg/sentry/arch"
rpb "gvisor.dev/gvisor/pkg/sentry/arch/registers_go_proto"
ucspb "gvisor.dev/gvisor/pkg/sentry/kernel/uncaught_signal_go_proto"
"gvisor.dev/gvisor/pkg/sentry/strace"
@@ -53,9 +51,9 @@ type compatEmitter struct {
}
func newCompatEmitter(logFD int) (*compatEmitter, error) {
- nameMap, ok := strace.Lookup(abi.Linux, arch.AMD64)
+ nameMap, ok := getSyscallNameMap()
if !ok {
- return nil, fmt.Errorf("amd64 Linux syscall table not found")
+ return nil, fmt.Errorf("Linux syscall table not found")
}
c := &compatEmitter{
@@ -86,16 +84,16 @@ func (c *compatEmitter) Emit(msg proto.Message) (bool, error) {
}
func (c *compatEmitter) emitUnimplementedSyscall(us *spb.UnimplementedSyscall) {
- regs := us.Registers.GetArch().(*rpb.Registers_Amd64).Amd64
+ regs := us.Registers
c.mu.Lock()
defer c.mu.Unlock()
- sysnr := regs.OrigRax
+ sysnr := syscallNum(regs)
tr := c.trackers[sysnr]
if tr == nil {
switch sysnr {
- case syscall.SYS_PRCTL, syscall.SYS_ARCH_PRCTL:
+ case syscall.SYS_PRCTL:
// args: cmd, ...
tr = newArgsTracker(0)
@@ -112,10 +110,11 @@ func (c *compatEmitter) emitUnimplementedSyscall(us *spb.UnimplementedSyscall) {
tr = newArgsTracker(2)
default:
- tr = &onceTracker{}
+ tr = newArchArgsTracker(sysnr)
}
c.trackers[sysnr] = tr
}
+
if tr.shouldReport(regs) {
c.sink.Infof("Unsupported syscall: %s, regs: %+v", c.nameMap.Name(uintptr(sysnr)), regs)
tr.onReported(regs)
@@ -139,10 +138,10 @@ func (c *compatEmitter) Close() error {
// the syscall and arguments.
type syscallTracker interface {
// shouldReport returns true is the syscall should be reported.
- shouldReport(regs *rpb.AMD64Registers) bool
+ shouldReport(regs *rpb.Registers) bool
// onReported marks the syscall as reported.
- onReported(regs *rpb.AMD64Registers)
+ onReported(regs *rpb.Registers)
}
// onceTracker reports only a single time, used for most syscalls.
@@ -150,10 +149,45 @@ type onceTracker struct {
reported bool
}
-func (o *onceTracker) shouldReport(_ *rpb.AMD64Registers) bool {
+func (o *onceTracker) shouldReport(_ *rpb.Registers) bool {
return !o.reported
}
-func (o *onceTracker) onReported(_ *rpb.AMD64Registers) {
+func (o *onceTracker) onReported(_ *rpb.Registers) {
o.reported = true
}
+
+// argsTracker reports only once for each different combination of arguments.
+// It's used for generic syscalls like ioctl to report once per 'cmd'.
+type argsTracker struct {
+ // argsIdx is the syscall arguments to use as unique ID.
+ argsIdx []int
+ reported map[string]struct{}
+ count int
+}
+
+func newArgsTracker(argIdx ...int) *argsTracker {
+ return &argsTracker{argsIdx: argIdx, reported: make(map[string]struct{})}
+}
+
+// key returns the command based on the syscall argument index.
+func (a *argsTracker) key(regs *rpb.Registers) string {
+ var rv string
+ for _, idx := range a.argsIdx {
+ rv += fmt.Sprintf("%d|", argVal(idx, regs))
+ }
+ return rv
+}
+
+func (a *argsTracker) shouldReport(regs *rpb.Registers) bool {
+ if a.count >= reportLimit {
+ return false
+ }
+ _, ok := a.reported[a.key(regs)]
+ return !ok
+}
+
+func (a *argsTracker) onReported(regs *rpb.Registers) {
+ a.count++
+ a.reported[a.key(regs)] = struct{}{}
+}
diff --git a/runsc/boot/compat_amd64.go b/runsc/boot/compat_amd64.go
index 43cd0db94..bfb094577 100644
--- a/runsc/boot/compat_amd64.go
+++ b/runsc/boot/compat_amd64.go
@@ -16,62 +16,83 @@ package boot
import (
"fmt"
+ "syscall"
+ "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
-// argsTracker reports only once for each different combination of arguments.
-// It's used for generic syscalls like ioctl to report once per 'cmd'.
-type argsTracker struct {
- // argsIdx is the syscall arguments to use as unique ID.
- argsIdx []int
- reported map[string]struct{}
- count int
+// newRegs create a empty Registers instance.
+func newRegs() *rpb.Registers {
+ return &rpb.Registers{
+ Arch: &rpb.Registers_Amd64{
+ Amd64: &rpb.AMD64Registers{},
+ },
+ }
}
-func newArgsTracker(argIdx ...int) *argsTracker {
- return &argsTracker{argsIdx: argIdx, reported: make(map[string]struct{})}
-}
+func argVal(argIdx int, regs *rpb.Registers) uint32 {
+ amd64Regs := regs.GetArch().(*rpb.Registers_Amd64).Amd64
-// cmd returns the command based on the syscall argument index.
-func (a *argsTracker) key(regs *rpb.AMD64Registers) string {
- var rv string
- for _, idx := range a.argsIdx {
- rv += fmt.Sprintf("%d|", argVal(idx, regs))
+ switch argIdx {
+ case 0:
+ return uint32(amd64Regs.Rdi)
+ case 1:
+ return uint32(amd64Regs.Rsi)
+ case 2:
+ return uint32(amd64Regs.Rdx)
+ case 3:
+ return uint32(amd64Regs.R10)
+ case 4:
+ return uint32(amd64Regs.R8)
+ case 5:
+ return uint32(amd64Regs.R9)
}
- return rv
+ panic(fmt.Sprintf("invalid syscall argument index %d", argIdx))
}
-func argVal(argIdx int, regs *rpb.AMD64Registers) uint32 {
+func setArgVal(argIdx int, argVal uint64, regs *rpb.Registers) {
+ amd64Regs := regs.GetArch().(*rpb.Registers_Amd64).Amd64
+
switch argIdx {
case 0:
- return uint32(regs.Rdi)
+ amd64Regs.Rdi = argVal
case 1:
- return uint32(regs.Rsi)
+ amd64Regs.Rsi = argVal
case 2:
- return uint32(regs.Rdx)
+ amd64Regs.Rdx = argVal
case 3:
- return uint32(regs.R10)
+ amd64Regs.R10 = argVal
case 4:
- return uint32(regs.R8)
+ amd64Regs.R8 = argVal
case 5:
- return uint32(regs.R9)
+ amd64Regs.R9 = argVal
+ default:
+ panic(fmt.Sprintf("invalid syscall argument index %d", argIdx))
}
- panic(fmt.Sprintf("invalid syscall argument index %d", argIdx))
}
-func (a *argsTracker) shouldReport(regs *rpb.AMD64Registers) bool {
- if a.count >= reportLimit {
- return false
- }
- _, ok := a.reported[a.key(regs)]
- return !ok
+func getSyscallNameMap() (strace.SyscallMap, bool) {
+ return strace.Lookup(abi.Linux, arch.AMD64)
}
-func (a *argsTracker) onReported(regs *rpb.AMD64Registers) {
- a.count++
- a.reported[a.key(regs)] = struct{}{}
+func syscallNum(regs *rpb.Registers) uint64 {
+ amd64Regs := regs.GetArch().(*rpb.Registers_Amd64).Amd64
+ return amd64Regs.OrigRax
+}
+
+func newArchArgsTracker(sysnr uint64) syscallTracker {
+ switch sysnr {
+ case syscall.SYS_ARCH_PRCTL:
+ // args: cmd, ...
+ return newArgsTracker(0)
+
+ default:
+ return &onceTracker{}
+ }
}
diff --git a/runsc/boot/compat_arm64.go b/runsc/boot/compat_arm64.go
new file mode 100644
index 000000000..50947d7a9
--- /dev/null
+++ b/runsc/boot/compat_arm64.go
@@ -0,0 +1,96 @@
+// 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"
+ "syscall"
+
+ "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 {
+
+ switch sysnr {
+ // currently, no arch specific syscalls need to be handled here.
+ default:
+ return &onceTracker{}
+ }
+}
diff --git a/runsc/boot/compat_test.go b/runsc/boot/compat_test.go
index 388298d8d..4bb520898 100644
--- a/runsc/boot/compat_test.go
+++ b/runsc/boot/compat_test.go
@@ -1,4 +1,4 @@
-// Copyright 2018 The gVisor Authors.
+// 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.
@@ -16,8 +16,6 @@ package boot
import (
"testing"
-
- rpb "gvisor.dev/gvisor/pkg/sentry/arch/registers_go_proto"
)
func TestOnceTracker(t *testing.T) {
@@ -35,31 +33,34 @@ func TestOnceTracker(t *testing.T) {
func TestArgsTracker(t *testing.T) {
for _, tc := range []struct {
- name string
- idx []int
- rdi1 uint64
- rdi2 uint64
- rsi1 uint64
- rsi2 uint64
- want bool
+ name string
+ idx []int
+ arg1_1 uint64
+ arg1_2 uint64
+ arg2_1 uint64
+ arg2_2 uint64
+ want bool
}{
- {name: "same rdi", idx: []int{0}, rdi1: 123, rdi2: 123, want: false},
- {name: "same rsi", idx: []int{1}, rsi1: 123, rsi2: 123, want: false},
- {name: "diff rdi", idx: []int{0}, rdi1: 123, rdi2: 321, want: true},
- {name: "diff rsi", idx: []int{1}, rsi1: 123, rsi2: 321, want: true},
- {name: "cmd is uint32", idx: []int{0}, rsi1: 0xdead00000123, rsi2: 0xbeef00000123, want: false},
- {name: "same 2 args", idx: []int{0, 1}, rsi1: 123, rdi1: 321, rsi2: 123, rdi2: 321, want: false},
- {name: "diff 2 args", idx: []int{0, 1}, rsi1: 123, rdi1: 321, rsi2: 789, rdi2: 987, want: true},
+ {name: "same arg1", idx: []int{0}, arg1_1: 123, arg1_2: 123, want: false},
+ {name: "same arg2", idx: []int{1}, arg2_1: 123, arg2_2: 123, want: false},
+ {name: "diff arg1", idx: []int{0}, arg1_1: 123, arg1_2: 321, want: true},
+ {name: "diff arg2", idx: []int{1}, arg2_1: 123, arg2_2: 321, want: true},
+ {name: "cmd is uint32", idx: []int{0}, arg2_1: 0xdead00000123, arg2_2: 0xbeef00000123, want: false},
+ {name: "same 2 args", idx: []int{0, 1}, arg2_1: 123, arg1_1: 321, arg2_2: 123, arg1_2: 321, want: false},
+ {name: "diff 2 args", idx: []int{0, 1}, arg2_1: 123, arg1_1: 321, arg2_2: 789, arg1_2: 987, want: true},
} {
t.Run(tc.name, func(t *testing.T) {
c := newArgsTracker(tc.idx...)
- regs := &rpb.AMD64Registers{Rdi: tc.rdi1, Rsi: tc.rsi1}
+ regs := newRegs()
+ setArgVal(0, tc.arg1_1, regs)
+ setArgVal(1, tc.arg2_1, regs)
if !c.shouldReport(regs) {
t.Error("first call to shouldReport, got: false, want: true")
}
c.onReported(regs)
- regs.Rdi, regs.Rsi = tc.rdi2, tc.rsi2
+ setArgVal(0, tc.arg1_2, regs)
+ setArgVal(1, tc.arg2_2, regs)
if got := c.shouldReport(regs); tc.want != got {
t.Errorf("second call to shouldReport, got: %t, want: %t", got, tc.want)
}
@@ -70,7 +71,9 @@ func TestArgsTracker(t *testing.T) {
func TestArgsTrackerLimit(t *testing.T) {
c := newArgsTracker(0, 1)
for i := 0; i < reportLimit; i++ {
- regs := &rpb.AMD64Registers{Rdi: 123, Rsi: uint64(i)}
+ regs := newRegs()
+ setArgVal(0, 123, regs)
+ setArgVal(1, uint64(i), regs)
if !c.shouldReport(regs) {
t.Error("shouldReport before limit was reached, got: false, want: true")
}
@@ -78,7 +81,9 @@ func TestArgsTrackerLimit(t *testing.T) {
}
// Should hit the count limit now.
- regs := &rpb.AMD64Registers{Rdi: 123, Rsi: 123456}
+ regs := newRegs()
+ setArgVal(0, 123, regs)
+ setArgVal(1, 123456, regs)
if c.shouldReport(regs) {
t.Error("shouldReport after limit was reached, got: true, want: false")
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 03:27:04 +0000