[src/trunk]: src/lib/libc/arch/ns32k/sys __clone stub for ns32k. Basic code t...

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

details:   https://anonhg.NetBSD.org/src/rev/b4211b01b2d5
branches:  trunk
changeset: 513695:b4211b01b2d5
user:      matthias <matthias%NetBSD.org@localhost>
date:      Wed Aug 08 09:19:40 2001 +0000

description:
__clone stub for ns32k. Basic code taken from m68k.

diffstat:

 lib/libc/arch/ns32k/sys/__clone.S |  76 +++++++++++++++++++++++++++++++++++++++
 1 files changed, 76 insertions(+), 0 deletions(-)

diffs (80 lines):

diff -r fa73bbb433cd -r b4211b01b2d5 lib/libc/arch/ns32k/sys/__clone.S
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/arch/ns32k/sys/__clone.S Wed Aug 08 09:19:40 2001 +0000
@@ -0,0 +1,76 @@
+/*     $NetBSD: __clone.S,v 1.1 2001/08/08 09:19:40 matthias Exp $     */
+
+/*-
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Steve C. Woodford.
+ *
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the NetBSD
+ *     Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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)
+       movd    S_ARG0,r2
+       cmpqd   0,r2            /* NULL function pointer? */
+       beq     2f              /* Yup, bomb out */
+       movd    S_ARG1,r0
+       cmpqd   0,r0            /* NULL stack? */
+       beq     2f              /* Yup, bomb out */
+       movd    S_ARG3,-4(r0)   /* "Push" clone's `arg' on its new stack */
+       addr    -16(r0),tos     /* Syscall arg: stack */
+                               /*              (-16 because of faked syscall */
+                               /*               args and the "push") */
+       movd    S_ARG3,tos      /* Syscall arg: flags */
+       movqd   0,tos           /* Fake return address */
+       SYSTRAP(__clone)        /* Note: `fn' in r2 is preserved */
+       adjspd  -12             /* Zap syscall args */
+       bcs     _ASM_LABEL(cerror)/* Punt if syscall failed */
+       cmpqd   0,r0
+       bne     1f              /* We're the parent, just return. */
+       lprd    fp,0            /* Clear framepointer */
+       jsr     0(r2)           /* We're the clone, call the function */
+       movd    r0,tos          /* If clone returns, invoke _exit(3) */
+       bsr     _C_LABEL(_exit)
+       /* NOTREACHED */
+
+1:     ret     0
+2:     movd    EINVAL,r0
+       br      _ASM_LABEL(cerror)