diff options
Diffstat (limited to 'libgo/go/runtime/cgo_mmap.go')
| -rw-r--r-- | libgo/go/runtime/cgo_mmap.go | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/libgo/go/runtime/cgo_mmap.go b/libgo/go/runtime/cgo_mmap.go new file mode 100644 index 0000000..ef5501c --- /dev/null +++ b/libgo/go/runtime/cgo_mmap.go @@ -0,0 +1,34 @@ +// 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 |