m88k suppport code for librthread.

2 files changed, 99 insertions, 0 deletions

diff --git a/lib/librthread/arch/m88k/_atomic_lock.c b/lib/librthread/arch/m88k/_atomic_lock.c
new file mode 100644
index 00000000000..47562038178
--- /dev/null
+++ b/lib/librthread/arch/m88k/_atomic_lock.c
@@ -0,0 +1,44 @@
+/*	$OpenBSD: _atomic_lock.c,v 1.1 2005/12/23 20:08:27 miod Exp $	*/
+
+/*
+ * Copyright (c) 2003, Miodrag Vallat.
+ *
+ * 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 m88k
+ */
+
+#include "spinlock.h"
+
+int
+_atomic_lock(volatile _spinlock_lock_t *lock)
+{
+	_spinlock_lock_t old;
+
+	old = _SPINLOCK_LOCKED;
+	__asm__ __volatile__
+	    ("xmem %0, %2, r0" : "=r" (old) : "0" (old), "r" (lock));
+
+	return (old != _SPINLOCK_UNLOCKED);
+}
diff --git a/lib/librthread/arch/m88k/rfork_thread.S b/lib/librthread/arch/m88k/rfork_thread.S
new file mode 100644
index 00000000000..77afd78838d
--- /dev/null
+++ b/lib/librthread/arch/m88k/rfork_thread.S
@@ -0,0 +1,55 @@
+/*	$OpenBSD: rfork_thread.S,v 1.1 2005/12/23 20:08:27 miod Exp $	*/
+
+/*
+ * Copyright (c) 2005, Miodrag Vallat
+ *
+ * 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.
+ */
+
+#include "../../../libc/arch/m88k/SYS.h"
+
+/*
+ * int rfork_thread(int flags, void *stack, void (*func)(void *), void *arg);
+ */
+ENTRY(rfork_thread)
+	or	r6,  r3,  r0	/* save stack */
+	or	r13, r0,  __SYSCALLNAME(SYS_,rfork)
+	tb0	0,   r0,  128	/* corrupts r2 and r3 in the child */
+	br	__cerror
+
+	bcnd	eq0, r2,  1f
+
+	/*
+	 * In parent process: just return.
+	 */
+	jmp	r1
+
+1:
+	/*
+	 * In child process: switch stack, invoke function, then exit.
+	 */
+	or	r31, r6,  r0	/* stack */
+	jsr.n	r4		/* func */
+	 or	r2,  r5,  r0	/* arg */
+
+	or	r13, r0,  __SYSCALLNAME(SYS_,threxit)
+	tb0	0,   r0,  128