github.com/nicocha30/gvisor-ligolo@v0.0.0-20230726075806-989fa2c0a413/runsc/boot/compat_arm64.go (about)

     1  // Copyright 2019 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package boot
    16  
    17  import (
    18  	"fmt"
    19  
    20  	"github.com/nicocha30/gvisor-ligolo/pkg/abi"
    21  	"github.com/nicocha30/gvisor-ligolo/pkg/sentry/arch"
    22  	rpb "github.com/nicocha30/gvisor-ligolo/pkg/sentry/arch/registers_go_proto"
    23  	"github.com/nicocha30/gvisor-ligolo/pkg/sentry/strace"
    24  )
    25  
    26  const (
    27  	// reportLimit is the max number of events that should be reported per
    28  	// tracker.
    29  	reportLimit = 100
    30  	syscallLink = "https://gvisor.dev/c/linux/arm64"
    31  )
    32  
    33  // newRegs create a empty Registers instance.
    34  func newRegs() *rpb.Registers {
    35  	return &rpb.Registers{
    36  		Arch: &rpb.Registers_Arm64{
    37  			Arm64: &rpb.ARM64Registers{},
    38  		},
    39  	}
    40  }
    41  
    42  func argVal(argIdx int, regs *rpb.Registers) uint64 {
    43  	arm64Regs := regs.GetArch().(*rpb.Registers_Arm64).Arm64
    44  
    45  	switch argIdx {
    46  	case 0:
    47  		return arm64Regs.R0
    48  	case 1:
    49  		return arm64Regs.R1
    50  	case 2:
    51  		return arm64Regs.R2
    52  	case 3:
    53  		return arm64Regs.R3
    54  	case 4:
    55  		return arm64Regs.R4
    56  	case 5:
    57  		return arm64Regs.R5
    58  	}
    59  	panic(fmt.Sprintf("invalid syscall argument index %d", argIdx))
    60  }
    61  
    62  func setArgVal(argIdx int, argVal uint64, regs *rpb.Registers) {
    63  	arm64Regs := regs.GetArch().(*rpb.Registers_Arm64).Arm64
    64  
    65  	switch argIdx {
    66  	case 0:
    67  		arm64Regs.R0 = argVal
    68  	case 1:
    69  		arm64Regs.R1 = argVal
    70  	case 2:
    71  		arm64Regs.R2 = argVal
    72  	case 3:
    73  		arm64Regs.R3 = argVal
    74  	case 4:
    75  		arm64Regs.R4 = argVal
    76  	case 5:
    77  		arm64Regs.R5 = argVal
    78  	default:
    79  		panic(fmt.Sprintf("invalid syscall argument index %d", argIdx))
    80  	}
    81  }
    82  
    83  func getSyscallNameMap() (strace.SyscallMap, bool) {
    84  	return strace.Lookup(abi.Linux, arch.ARM64)
    85  }
    86  
    87  func syscallNum(regs *rpb.Registers) uint64 {
    88  	arm64Regs := regs.GetArch().(*rpb.Registers_Arm64).Arm64
    89  	return arm64Regs.R8
    90  }
    91  
    92  func newArchArgsTracker(sysnr uint64) syscallTracker {
    93  	// currently, no arch specific syscalls need to be handled here.
    94  	return nil
    95  }