modernc.org/memory@v1.8.0/mmap_linux_32.go (about) 1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE-GO file. 4 5 //go:build linux && (386 || arm || mips || mipsle) 6 // +build linux 7 // +build 386 arm mips mipsle 8 9 package memory 10 11 import ( 12 "syscall" 13 ) 14 15 // Function syscall.mmap and syscall.mmap2 are same for linux/386, linux/arm, 16 // linux/mips and linux/mipsle 17 18 // https://cs.opensource.google/go/go/+/refs/tags/go1.17.8:src/syscall/syscall_linux_386.go;l=99-105 19 func mmapSyscall(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 20 page := uintptr(offset / 4096) 21 if offset != int64(page)*4096 { 22 return 0, syscall.EINVAL 23 } 24 return mmap2Syscall(addr, length, prot, flags, fd, page) 25 } 26 27 // https://cs.opensource.google/go/go/+/refs/tags/go1.17.8:src/syscall/zsyscall_linux_386.go;l=1361-1370 28 func mmap2Syscall(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) { 29 r0, _, e1 := syscall.Syscall6(syscall.SYS_MMAP2, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flags), uintptr(fd), uintptr(pageOffset)) 30 xaddr = uintptr(r0) 31 if e1 != 0 { 32 err = e1 33 } 34 return 35 }