github.com/bytedance/mockey@v1.2.10/internal/monkey/mem/prot/protect_windows.go (about)

     1  /*
     2   * Copyright 2022 ByteDance Inc.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package prot
    18  
    19  import (
    20  	"reflect"
    21  	"syscall"
    22  
    23  	"github.com/bytedance/mockey/internal/monkey/common"
    24  )
    25  
    26  const (
    27  	protectRWX = 0x40
    28  )
    29  
    30  var procVirtualProtect = syscall.NewLazyDLL("kernel32.dll").NewProc("VirtualProtect")
    31  
    32  func MProtectRWX(addr uintptr) error {
    33  	return mProtectPage(common.PageOf(addr), protectRWX)
    34  }
    35  
    36  func mProtectRX(b []byte) error {
    37  	return MProtectRWX(common.PtrOf(b))
    38  }
    39  
    40  func mProtectPage(page, prot uintptr) error {
    41  	var ori uint
    42  	return virtualProtect(page, common.PageSize(), uint32(prot), common.PtrAt(reflect.ValueOf(&ori)))
    43  }
    44  
    45  func virtualProtect(lpAddress uintptr, dwSize int, flNewProtect uint32, lpflOldProtect uintptr) error {
    46  	ret, _, _ := procVirtualProtect.Call(lpAddress, uintptr(dwSize), uintptr(flNewProtect), lpflOldProtect)
    47  	if ret == 0 {
    48  		return syscall.GetLastError()
    49  	}
    50  	return nil
    51  }