| // Copyright 2015 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 file. |
| |
| // Support for memory sanitizer. See runtime/cgo/mmap.go. |
| |
| // +build linux,amd64 |
| |
| package runtime |
| |
| import "unsafe" |
| |
| // _cgo_mmap is filled in by runtime/cgo when it is linked into the |
| // program, so it is only non-nil when using cgo. |
| //go:linkname _cgo_mmap _cgo_mmap |
| var _cgo_mmap unsafe.Pointer |
| |
| func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) (ret unsafe.Pointer) { |
| if _cgo_mmap != nil { |
| systemstack(func() { |
| ret = callCgoMmap(addr, n, prot, flags, fd, off) |
| }) |
| return |
| } |
| return sysMmap(addr, n, prot, flags, fd, off) |
| } |
| |
| // sysMmap calls the mmap system call. It is implemented in assembly. |
| func sysMmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) unsafe.Pointer |
| |
| // cgoMmap calls the mmap function in the runtime/cgo package on the |
| // callCgoMmap calls the mmap function in the runtime/cgo package |
| // using the GCC calling convention. It is implemented in assembly. |
| func callCgoMmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) unsafe.Pointer |