add a powerpc implementation of rfork_thread().

From Tim Wiess <tim at nop dot cx>

ok drahn@

1 files changed, 53 insertions, 0 deletions

diff --git a/lib/librthread/arch/powerpc/rfork_thread.S b/lib/librthread/arch/powerpc/rfork_thread.S
new file mode 100644
index 00000000000..dd6a4d3f241
--- /dev/null
+++ b/lib/librthread/arch/powerpc/rfork_thread.S
@@ -0,0 +1,53 @@
+/*	$OpenBSD: rfork_thread.S,v 1.1 2005/12/04 04:09:33 brad Exp $	*/
+
+/*
+ * Copyright (c) 2005 Tim Wiess <tim@nop.cx>
+ *
+ * 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>
+
+ENTRY(rfork_thread)
+	/* sanity check */
+	cmpwi	%r4, 0
+	beq	1f
+	cmpwi	%r5, 0
+	beq	1f
+	
+	mr	%r7,%r4
+	
+	/* call rfork */
+	li	%r0, SYS_rfork
+	sc
+	cmpwi	%r0, 0
+	bne	2f
+	
+	/* check if we are parent or child */
+	cmpwi	%r3, 0
+	bnelr
+	
+	/* child */
+	mtlr	%r5		/* fp */
+	mr	%r3, %r6	/* arg */
+	mr	%r1, %r7	/* new sp */
+	blrl
+	
+	/* child returned, call _exit */
+	li	%r0, SYS_exit
+	sc
+1:
+	li	%r3, -1
+2:
+	b PIC_PLT(_C_LABEL(__cerror))