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 32 _getentropy_fail(void) 33 { 34 raise(SIGKILL); 35 } 36 37 static 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 58 static inline void 59 _rs_forkdetect(void) 60 { 61 } 62