Initial versions of arm code, in-tree development (not yet working).

2 files changed, 89 insertions, 0 deletions

diff --git a/lib/librthread/arch/arm/_atomic_lock.c b/lib/librthread/arch/arm/_atomic_lock.c
new file mode 100644
index 00000000000..094a3c4c27f
--- /dev/null
+++ b/lib/librthread/arch/arm/_atomic_lock.c
@@ -0,0 +1,43 @@
+/*	$OpenBSD: _atomic_lock.c,v 1.1 2005/12/14 19:42:25 drahn Exp $	*/
+
+/*
+ * Copyright (c) 2004 Dale Rahn. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */ 
+
+/*
+ * Atomic lock for arm
+ */
+
+#include "spinlock.h"
+
+int
+_atomic_lock(volatile _spinlock_lock_t *lock)
+{
+	_spinlock_lock_t old;
+
+	__asm__("swp %0, %2, [%1]"
+		: "=r" (old), "=r" (lock)
+		: "r" (_SPINLOCK_LOCKED), "1" (lock) );
+
+	return (old != _SPINLOCK_UNLOCKED);
+}
diff --git a/lib/librthread/arch/arm/rfork_thread.S b/lib/librthread/arch/arm/rfork_thread.S
new file mode 100644
index 00000000000..ad6ebb408c2
--- /dev/null
+++ b/lib/librthread/arch/arm/rfork_thread.S
@@ -0,0 +1,46 @@
+/* $OpenBSD: rfork_thread.S,v 1.1 2005/12/14 19:42:25 drahn Exp $ */
+/*
+ * Copyright (c) 2005 Dale Rahn <drahn@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.
+ */
+#include <sys/syscall.h>
+#include <machine/asm.h>
+#include "../../../libc/arch/arm/SYS.h"
+
+/*
+ *              r0     r1          r2         r3
+ * rfork_thread(flags, stack_addr, start_fnc, start_arg);
+ */
+
+ENTRY(rfork_thread)
+	stmdb   sp!, {r1-r4,sl,fp,lr}
+
+
+	SYSTRAP(rfork)
+	bcs	1f
+
+	/* check if we are parent or child */
+	cmp	r0, #0
+	ldmia   sp!, {r1-r4,sl,fp,lr}
+	movne	pc, lr
+
+	/* child */
+	mov	sp, r1
+	mov	r0, r3
+	mov	lr, pc
+	mov	pc, r2
+	SYSTRAP(exit)
+1:
+	ldmia   sp!, {r1-r4,sl,fp,lr}
+	b     PIC_SYM(CERROR, PLT)