gcc_mmap.c revision efea46b87b2dcc66da02dfbf66fd901d24c7a091 
1// Copyright 2015 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 file.
4
5// +build linux,amd64
6
7#include <errno.h>
8#include <stdint.h>
9#include <sys/mman.h>
10
11#include "libcgo.h"
12
13void *
14x_cgo_mmap(void *addr, uintptr_t length, int32_t prot, int32_t flags, int32_t fd, uint32_t offset) {
15	void *p;
16
17	_cgo_tsan_acquire();
18	p = mmap(addr, length, prot, flags, fd, offset);
19	_cgo_tsan_release();
20	if (p == MAP_FAILED) {
21		/* This is what the Go code expects on failure.  */
22		p = (void *) (uintptr_t) errno;
23	}
24	return p;
25}
26