[src/trunk]: src/lib/libc/arch/sparc64/sys sparc64 version, cloned (har har!)...

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

details:   https://anonhg.NetBSD.org/src/rev/cbf77419991f
branches:  trunk
changeset: 513069:cbf77419991f
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Mon Jul 23 07:35:44 2001 +0000

description:
sparc64 version, cloned (har har!) from the sparc version and tweaked.

diffstat:

 lib/libc/arch/sparc64/sys/__clone.S |  94 +++++++++++++++++++++++++++++++++++++
 1 files changed, 94 insertions(+), 0 deletions(-)

diffs (98 lines):

diff -r 2c5ddb37d26b -r cbf77419991f lib/libc/arch/sparc64/sys/__clone.S
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/arch/sparc64/sys/__clone.S       Mon Jul 23 07:35:44 2001 +0000
@@ -0,0 +1,94 @@
+/*     $NetBSD: __clone.S,v 1.1 2001/07/23 07:35:44 thorpej Exp $      */
+
+/*-     
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jason R. Thorpe.
+ *      
+ * 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)
+       save    %sp, -176, %sp
+
+       /*
+        * Sanity checks: func and stack may not be NULL.
+        */
+       tst     %i0
+       be      8f              ! func == NULL, bail
+        orcc   %i1, %g0, %o1   ! setup stack arg for syscall, test
+       be      8f              ! stack == NULL, bail
+        mov    %i2, %o0        ! setup flags arg for syscall
+
+       /*
+        * Store the function and the argument on our child's stack
+        */
+       sub     %o1, 16, %o1    ! make space on the child's stack
+       stx     %i0, [%o1]      ! save func
+       stx     %i3, [%o1+8]    ! save arg
+
+       /*
+        * Args are now set up for system call as (flags, stack).
+        */
+       mov     SYS___clone, %g1
+       t       ST_SYSCALL
+       be      9f
+        tst    %o1             ! %o1 (rv[1]) == 0 in parent
+
+1:     bz      2f              ! yes, parent
+        ldx    [%sp], %l0      ! grab the function
+       ldx     [%sp+8], %o0    ! and the argument from the stack
+       add     %sp, 16, %sp    ! restore the stack
+       call    %l0             ! Call the clone's entry point.
+        nop
+
+       CALL(_C_LABEL(_exit))
+       /* NOTREACHED */
+
+2:     ret
+        restore %g0, %o0, %o0
+
+8:     mov     EINVAL, %o0
+9:     ERROR()
+       mov     -1, %i0
+       ret
+        restore %g0, -1, %o0