1/*	$OpenBSD: arc4random.h,v 1.4 2015/01/15 06:57:18 deraadt Exp $	*/
2
3/*
4 * Copyright (c) 1996, David Mazieres <dm@uun.org>
5 * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
6 * Copyright (c) 2013, Markus Friedl <markus@openbsd.org>
7 * Copyright (c) 2014, Theo de Raadt <deraadt@openbsd.org>
8 *
9 * Permission to use, copy, modify, and distribute this software for any
10 * purpose with or without fee is hereby granted, provided that the above
11 * copyright notice and this permission notice appear in all copies.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 */
21
22/*
23 * Stub functions for portability.
24 */
25#include <sys/mman.h>
26
27#include <signal.h>
28
29#include "thread_private.h"
30
31static inline void
32_getentropy_fail(void)
33{
34	raise(SIGKILL);
35}
36
37static inline int
38_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
39{
40	struct {
41		struct _rs rs;
42		struct _rsx rsx;
43	} *p;
44
45	if ((p = mmap(NULL, sizeof(*p), PROT_READ|PROT_WRITE,
46	    MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
47		return (-1);
48	if (minherit(p, sizeof(*p), MAP_INHERIT_ZERO) == -1) {
49		munmap(p, sizeof(*p));
50		return (-1);
51	}
52
53	*rsp = &p->rs;
54	*rsxp = &p->rsx;
55	return (0);
56}
57
58static inline void
59_rs_forkdetect(void)
60{
61}
62