Move more OS-specific functionality to arc4random.h headers.

Move <sys/mman.h> and raise(SIGKILL) calls to OS-specific headers.
On OpenBSD, move thread_private.h as well to arc4random.h.
On Windows, use TerminateProcess on getentropy failure.
ok deraadt@

src/lib/libc/crypt/arc4random.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random.c,v 1.48 2014/07/19 00:08:41 deraadt Exp $	*/
+/*	$OpenBSD: arc4random.c,v 1.49 2014/07/20 20:51:13 bcook Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -32,9 +32,6 @@
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/time.h>
-#include <sys/mman.h>
-
-#include "thread_private.h"
 
 #define KEYSTREAM_ONLY
 #include "chacha_private.h"
@@ -90,7 +87,7 @@ _rs_stir(void)
 	u_char rnd[KEYSZ + IVSZ];
 
 	if (getentropy(rnd, sizeof rnd) == -1)
-		raise(SIGKILL);
+		_getentropy_fail();
 
 	if (!rs)
 		_rs_init(rnd, sizeof(rnd));

src/lib/libc/crypt/arc4random.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random.h,v 1.2 2014/07/19 00:08:41 deraadt Exp $	*/
+/*	$OpenBSD: arc4random.h,v 1.3 2014/07/20 20:51:13 bcook Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -21,6 +21,17 @@
 /*
  * 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)

src/lib/libcrypto/arc4random/arc4random_linux.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_linux.h,v 1.6 2014/07/19 15:29:25 bcook Exp $	*/
+/*	$OpenBSD: arc4random_linux.h,v 1.7 2014/07/20 20:51:13 bcook Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -22,7 +22,10 @@
  * Stub functions for portability.
  */
 
+#include <sys/mman.h>
+
 #include <pthread.h>
+#include <signal.h>
 
 static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 #define _ARC4_LOCK()   pthread_mutex_lock(&arc4random_mtx)
@@ -36,6 +39,12 @@ extern int __register_atfork(void (*)(void), void(*)(void), void (*)(void), void
 #define _ARC4_ATFORK(f) pthread_atfork(NULL, NULL, (f))
 #endif
 
+static inline void
+_getentropy_fail(void)
+{
+	raise(SIGKILL);
+}
+
 static volatile sig_atomic_t _rs_forked;
 
 static inline void

src/lib/libcrypto/arc4random/arc4random_osx.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_osx.h,v 1.6 2014/07/19 15:29:25 bcook Exp $	*/
+/*	$OpenBSD: arc4random_osx.h,v 1.7 2014/07/20 20:51:13 bcook Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -22,7 +22,10 @@
  * Stub functions for portability.
  */
 
+#include <sys/mman.h>
+
 #include <pthread.h>
+#include <signal.h>
 
 static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 #define _ARC4_LOCK()   pthread_mutex_lock(&arc4random_mtx)
@@ -30,6 +33,12 @@ static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 
 #define _ARC4_ATFORK(f) pthread_atfork(NULL, NULL, (f))
 
+static inline void
+_getentropy_fail(void)
+{
+	raise(SIGKILL);
+}
+
 static volatile sig_atomic_t _rs_forked;
 
 static inline void

src/lib/libcrypto/arc4random/arc4random_solaris.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_solaris.h,v 1.6 2014/07/19 15:29:25 bcook Exp $	*/
+/*	$OpenBSD: arc4random_solaris.h,v 1.7 2014/07/20 20:51:13 bcook Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -22,7 +22,10 @@
  * Stub functions for portability.
  */
 
+#include <sys/mman.h>
+
 #include <pthread.h>
+#include <signal.h>
 
 static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 #define _ARC4_LOCK()   pthread_mutex_lock(&arc4random_mtx)
@@ -30,6 +33,12 @@ static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 
 #define _ARC4_ATFORK(f) pthread_atfork(NULL, NULL, (f))
 
+static inline void
+_getentropy_fail(void)
+{
+	raise(SIGKILL);
+}
+
 static volatile sig_atomic_t _rs_forked;
 
 static inline void

src/lib/libcrypto/arc4random/arc4random_win.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_win.h,v 1.3 2014/07/20 16:59:31 bcook Exp $	*/
+/*	$OpenBSD: arc4random_win.h,v 1.4 2014/07/20 20:51:13 bcook Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -42,6 +42,12 @@ static volatile HANDLE arc4random_mtx = NULL;
 
 #define _ARC4_UNLOCK() ReleaseMutex(arc4random_mtx)
 
+static inline void
+_getentropy_fail(void)
+{
+	TerminateProcess(GetCurrentProcess(), 0);
+}
+
 static inline int
 _rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
 {

src/lib/libcrypto/crypto/arc4random_linux.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_linux.h,v 1.6 2014/07/19 15:29:25 bcook Exp $	*/
+/*	$OpenBSD: arc4random_linux.h,v 1.7 2014/07/20 20:51:13 bcook Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -22,7 +22,10 @@
  * Stub functions for portability.
  */
 
+#include <sys/mman.h>
+
 #include <pthread.h>
+#include <signal.h>
 
 static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 #define _ARC4_LOCK()   pthread_mutex_lock(&arc4random_mtx)
@@ -36,6 +39,12 @@ extern int __register_atfork(void (*)(void), void(*)(void), void (*)(void), void
 #define _ARC4_ATFORK(f) pthread_atfork(NULL, NULL, (f))
 #endif
 
+static inline void
+_getentropy_fail(void)
+{
+	raise(SIGKILL);
+}
+
 static volatile sig_atomic_t _rs_forked;
 
 static inline void

src/lib/libcrypto/crypto/arc4random_osx.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_osx.h,v 1.6 2014/07/19 15:29:25 bcook Exp $	*/
+/*	$OpenBSD: arc4random_osx.h,v 1.7 2014/07/20 20:51:13 bcook Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -22,7 +22,10 @@
  * Stub functions for portability.
  */
 
+#include <sys/mman.h>
+
 #include <pthread.h>
+#include <signal.h>
 
 static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 #define _ARC4_LOCK()   pthread_mutex_lock(&arc4random_mtx)
@@ -30,6 +33,12 @@ static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 
 #define _ARC4_ATFORK(f) pthread_atfork(NULL, NULL, (f))
 
+static inline void
+_getentropy_fail(void)
+{
+	raise(SIGKILL);
+}
+
 static volatile sig_atomic_t _rs_forked;
 
 static inline void

src/lib/libcrypto/crypto/arc4random_solaris.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_solaris.h,v 1.6 2014/07/19 15:29:25 bcook Exp $	*/
+/*	$OpenBSD: arc4random_solaris.h,v 1.7 2014/07/20 20:51:13 bcook Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -22,7 +22,10 @@
  * Stub functions for portability.
  */
 
+#include <sys/mman.h>
+
 #include <pthread.h>
+#include <signal.h>
 
 static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 #define _ARC4_LOCK()   pthread_mutex_lock(&arc4random_mtx)
@@ -30,6 +33,12 @@ static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 
 #define _ARC4_ATFORK(f) pthread_atfork(NULL, NULL, (f))
 
+static inline void
+_getentropy_fail(void)
+{
+	raise(SIGKILL);
+}
+
 static volatile sig_atomic_t _rs_forked;
 
 static inline void

src/lib/libcrypto/crypto/arc4random_win.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_win.h,v 1.3 2014/07/20 16:59:31 bcook Exp $	*/
+/*	$OpenBSD: arc4random_win.h,v 1.4 2014/07/20 20:51:13 bcook Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -42,6 +42,12 @@ static volatile HANDLE arc4random_mtx = NULL;
 
 #define _ARC4_UNLOCK() ReleaseMutex(arc4random_mtx)
 
+static inline void
+_getentropy_fail(void)
+{
+	TerminateProcess(GetCurrentProcess(), 0);
+}
+
 static inline int
 _rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
 {