gtsocial-umbx

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mmap_unix.go (1189B)

      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 
     33 func mmap(nb int) uintptr {
     34     if m, _, e := syscall.RawSyscall6(syscall.SYS_MMAP, 0, uintptr(nb), _RW, _AP, 0, 0); e != 0 {
     35         panic(e)
     36     } else {
     37         return m
     38     }
     39 }
     40 
     41 func mprotect(p uintptr, nb int) {
     42     if _, _, err := syscall.RawSyscall(syscall.SYS_MPROTECT, p, uintptr(nb), _RX); err != 0 {
     43         panic(err)
     44     }
     45 }