github.com/goshafaq/sonic@v0.0.0-20231026082336-871835fb94c6/loader/mmap_unix.go (about)

     1  //go:build darwin || linux
     2  // +build darwin linux
     3  
     4  /**
     5   * Copyright 2023 ByteDance Inc.
     6   *
     7   * Licensed under the Apache License, Version 2.0 (the "License");
     8   * you may not use this file except in compliance with the License.
     9   * You may obtain a copy of the License at
    10   *
    11   *     http://www.apache.org/licenses/LICENSE-2.0
    12   *
    13   * Unless required by applicable law or agreed to in writing, software
    14   * distributed under the License is distributed on an "AS IS" BASIS,
    15   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    16   * See the License for the specific language governing permissions and
    17   * limitations under the License.
    18   */
    19  
    20  package loader
    21  
    22  import (
    23  	"syscall"
    24  )
    25  
    26  const (
    27  	_AP = syscall.MAP_ANON | syscall.MAP_PRIVATE
    28  	_RX = syscall.PROT_READ | syscall.PROT_EXEC
    29  	_RW = syscall.PROT_READ | syscall.PROT_WRITE
    30  )
    31  
    32  func mmap(nb int) uintptr {
    33  	if m, _, e := syscall.RawSyscall6(syscall.SYS_MMAP, 0, uintptr(nb), _RW, _AP, 0, 0); e != 0 {
    34  		panic(e)
    35  	} else {
    36  		return m
    37  	}
    38  }
    39  
    40  func mprotect(p uintptr, nb int) {
    41  	if _, _, err := syscall.RawSyscall(syscall.SYS_MPROTECT, p, uintptr(nb), _RX); err != 0 {
    42  		panic(err)
    43  	}
    44  }