[src/trunk]: src/lib/libc/arch/powerpc/sys Add a __clone(3) entry point for p...

[tsubai <tsubai%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f8c69706c9a2
branches:  trunk
changeset: 512999:f8c69706c9a2
user:      tsubai <tsubai%NetBSD.org@localhost>
date:      Fri Jul 20 17:19:15 2001 +0000

description:
Add a __clone(3) entry point for powerpc.

diffstat:

 lib/libc/arch/powerpc/sys/__clone.S |  66 +++++++++++++++++++++++++++++++++++++
 1 files changed, 66 insertions(+), 0 deletions(-)

diffs (70 lines):

diff -r 82287a6a42af -r f8c69706c9a2 lib/libc/arch/powerpc/sys/__clone.S
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/arch/powerpc/sys/__clone.S       Fri Jul 20 17:19:15 2001 +0000
@@ -0,0 +1,66 @@
+/*     $NetBSD: __clone.S,v 1.1 2001/07/20 17:19:15 tsubai Exp $       */
+
+/*-
+ * Copyright (c) 2001 Tsubai Masanari.  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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * 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 <sys/errno.h>
+#include "SYS.h"
+
+#ifdef WEAK_ALIAS
+WEAK_ALIAS(clone, __clone)
+#endif
+
+/*
+ * int __clone(int (*fn)(void *), void *stack, int flags, void *arg);
+ */
+ENTRY(__clone)
+       /*
+        * Sanity checks: func and stack may not be NULL.
+        */
+       cmpwi   3,0
+       beq     1f
+       cmpwi   4,0
+       beq     1f
+
+       mr      7,3             /* Save fn in r7. */
+       mr      3,5
+       li      0,SYS___clone   /* (flags, stack) */
+       sc
+       bso     2f              /* error... */
+
+       cmpwi   3,0
+       bnelr                   /* We're the parent, just return. */
+
+       mtlr    7               /* fn */
+       mr      3,6             /* arg */
+       blrl                    /* Call the clone's entry point. */
+
+       bl      PIC_PLT(_C_LABEL(_exit))
+
+1:
+       li      3,EINVAL
+2:
+       b       PIC_PLT(_C_LABEL(__cerror))