From 1a57267a17c2fc17fb6e104846fabc3e363c326c Mon Sep 17 00:00:00 2001 From: Emile Date: Fri, 16 Aug 2024 19:50:26 +0200 Subject: initial commit --- vendor/modernc.org/memory/mmap_linux_32.go | 35 ++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 vendor/modernc.org/memory/mmap_linux_32.go (limited to 'vendor/modernc.org/memory/mmap_linux_32.go') diff --git a/vendor/modernc.org/memory/mmap_linux_32.go b/vendor/modernc.org/memory/mmap_linux_32.go new file mode 100644 index 0000000..207ad41 --- /dev/null +++ b/vendor/modernc.org/memory/mmap_linux_32.go @@ -0,0 +1,35 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE-GO file. + +//go:build linux && (386 || arm || mips || mipsle) +// +build linux +// +build 386 arm mips mipsle + +package memory + +import ( + "syscall" +) + +// Function syscall.mmap and syscall.mmap2 are same for linux/386, linux/arm, +// linux/mips and linux/mipsle + +// https://cs.opensource.google/go/go/+/refs/tags/go1.17.8:src/syscall/syscall_linux_386.go;l=99-105 +func mmapSyscall(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { + page := uintptr(offset / 4096) + if offset != int64(page)*4096 { + return 0, syscall.EINVAL + } + return mmap2Syscall(addr, length, prot, flags, fd, page) +} + +// https://cs.opensource.google/go/go/+/refs/tags/go1.17.8:src/syscall/zsyscall_linux_386.go;l=1361-1370 +func mmap2Syscall(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) { + r0, _, e1 := syscall.Syscall6(syscall.SYS_MMAP2, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flags), uintptr(fd), uintptr(pageOffset)) + xaddr = uintptr(r0) + if e1 != 0 { + err = e1 + } + return +} -- cgit 1.4.1