101 lines
2.3 KiB
Go
101 lines
2.3 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package boot
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import (
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"fmt"
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"golang.org/x/sys/unix"
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"gvisor.dev/gvisor/pkg/abi"
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"gvisor.dev/gvisor/pkg/sentry/arch"
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rpb "gvisor.dev/gvisor/pkg/sentry/arch/registers_go_proto"
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"gvisor.dev/gvisor/pkg/sentry/strace"
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)
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const (
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// reportLimit is the max number of events that should be reported per
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// tracker.
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reportLimit = 100
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syscallLink = "https://gvisor.dev/c/linux/amd64"
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)
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// newRegs create a empty Registers instance.
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func newRegs() *rpb.Registers {
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return &rpb.Registers{
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Arch: &rpb.Registers_Amd64{
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Amd64: &rpb.AMD64Registers{},
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},
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}
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}
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func argVal(argIdx int, regs *rpb.Registers) uint64 {
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amd64Regs := regs.GetArch().(*rpb.Registers_Amd64).Amd64
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switch argIdx {
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case 0:
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return amd64Regs.Rdi
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case 1:
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return amd64Regs.Rsi
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case 2:
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return amd64Regs.Rdx
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case 3:
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return amd64Regs.R10
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case 4:
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return amd64Regs.R8
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case 5:
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return amd64Regs.R9
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}
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panic(fmt.Sprintf("invalid syscall argument index %d", argIdx))
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}
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func setArgVal(argIdx int, argVal uint64, regs *rpb.Registers) {
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amd64Regs := regs.GetArch().(*rpb.Registers_Amd64).Amd64
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switch argIdx {
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case 0:
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amd64Regs.Rdi = argVal
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case 1:
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amd64Regs.Rsi = argVal
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case 2:
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amd64Regs.Rdx = argVal
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case 3:
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amd64Regs.R10 = argVal
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case 4:
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amd64Regs.R8 = argVal
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case 5:
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amd64Regs.R9 = argVal
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default:
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panic(fmt.Sprintf("invalid syscall argument index %d", argIdx))
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}
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}
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func getSyscallNameMap() (strace.SyscallMap, bool) {
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return strace.Lookup(abi.Linux, arch.AMD64)
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}
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func syscallNum(regs *rpb.Registers) uint64 {
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amd64Regs := regs.GetArch().(*rpb.Registers_Amd64).Amd64
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return amd64Regs.OrigRax
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}
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func newArchArgsTracker(sysnr uint64) syscallTracker {
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switch sysnr {
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case unix.SYS_ARCH_PRCTL:
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// args: cmd, ...
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return newArgsTracker(0)
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}
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return nil
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}
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