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
31 static inline void
_getentropy_fail(void)32 _getentropy_fail(void)
33 {
34 raise(SIGKILL);
35 }
36
37 static inline int
_rs_allocate(struct _rs ** rsp,struct _rsx ** rsxp)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
58 static inline void
_rs_forkdetect(void)59 _rs_forkdetect(void)
60 {
61 }
62