add rfork_thread for alpha, from kudo takashi

1 files changed, 50 insertions, 0 deletions

diff --git a/lib/librthread/arch/alpha/rfork_thread.S b/lib/librthread/arch/alpha/rfork_thread.S
new file mode 100644
index 00000000000..ef5bf6d01c6
--- /dev/null
+++ b/lib/librthread/arch/alpha/rfork_thread.S
@@ -0,0 +1,50 @@
+/*	$OpenBSD: rfork_thread.S,v 1.1 2005/12/25 00:13:09 tedu Exp $ */
+/*
+ * Copyright (c) 2005 KUDO Takashi <takashi@crazyhack.net>
+ *
+ * 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 <machine/asm.h>
+#include "../../../libc/arch/alpha/SYS.h"
+
+/*
+ *                        a0           a1            a2                  a3
+ * int rfork_thread(int flags, void *stack, void (*func)(void *), void *arg);
+ */
+	.globl	rfork_thread
+	.ent	rfork_thread
+rfork_thread:
+	LDGP(pv)
+	lda	sp, -16(sp)
+	stq	ra, 0(sp)
+	.frame	sp, 16, ra
+	.prologue 1
+
+	CALLSYS_ERROR(rfork)
+	beq 	v0, 1f
+
+	/* parent process */
+	ldq	ra, 0(sp)
+	lda	sp, 16(sp)
+	RET
+
+1:
+	/* child process */
+	mov	a1, sp		/* setup stack */
+	mov	a3, a0		
+	jsr	ra, (a2), 0	/* funcall func(arg) */
+	LDGP(ra)
+
+	CALLSYS_ERROR(threxit)
+	.end	rfork_thread