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/* $OpenBSD: arc4random.h,v 1.3 2014/07/20 20:51:13 bcook Exp $ */
/*
* Copyright (c) 1996, David Mazieres <dm@uun.org>
* Copyright (c) 2008, Damien Miller <djm@openbsd.org>
* Copyright (c) 2013, Markus Friedl <markus@openbsd.org>
* Copyright (c) 2014, Theo de Raadt <deraadt@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Stub functions for portability.
*/
#include <sys/mman.h>
#include <signal.h>
#include "thread_private.h"
static inline void
_getentropy_fail(void)
{
raise(SIGKILL);
}
static inline int
_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
{
struct {
struct _rs rs;
struct _rsx rsx;
} *p;
if ((p = mmap(NULL, sizeof(*p), PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
return (-1);
if (minherit(p, sizeof(*p), MAP_INHERIT_ZERO) == -1) {
munmap(p, sizeof(*p));
return (-1);
}
*rsp = &p->rs;
*rsxp = &p->rsx;
return (0);
}
static inline void
_rs_forkdetect(void)
{
}
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