[src/trunk]: src/lib/libc/arch/i386/sys __clone stub for i386

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

details:   https://anonhg.NetBSD.org/src/rev/76fbd0366154
branches:  trunk
changeset: 512796:76fbd0366154
user:      fvdl <fvdl%NetBSD.org@localhost>
date:      Tue Jul 17 06:03:43 2001 +0000

description:
__clone stub for i386

diffstat:

 lib/libc/arch/i386/sys/__clone.S |  105 +++++++++++++++++++++++++++++++++++++++
 1 files changed, 105 insertions(+), 0 deletions(-)

diffs (109 lines):

diff -r a3ea5fa18196 -r 76fbd0366154 lib/libc/arch/i386/sys/__clone.S
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/arch/i386/sys/__clone.S  Tue Jul 17 06:03:43 2001 +0000
@@ -0,0 +1,105 @@
+/*     $NetBSD: __clone.S,v 1.1 2001/07/17 06:03:43 fvdl Exp $ */
+
+/*
+ * Copyright (c) 2001 Wasabi Systems, Inc.
+ * All rights reserved.
+ *
+ * Written by Frank van der Linden for Wasabi Systems, Inc.
+ *
+ * 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 for the NetBSD Project by
+ *      Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
+ * 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 <machine/asm.h>
+#include <sys/errno.h>
+#include "SYS.h"
+
+#ifdef WEAK_ALIAS
+WEAK_ALIAS(clone, __clone)
+#endif
+       .text
+
+ENTRY(__clone)
+       pushl   %ebp
+
+       /*
+        * Sanity checks: func and stack may not be NULL.
+        */
+       movl    8(%esp), %ebp
+       cmpl    $0,%ebp         /* function */
+       je      3f
+       movl    12(%esp),%eax   /* stack */
+       cmpl    $0,%eax
+       je      3f
+
+       /*
+        * Set up the stack for the clone.
+        */
+       movl    20(%esp),%ecx
+       movl    %ecx,-4(%eax)   /* argument */
+       leal    -8(%eax),%eax   /* sp points to return address */
+       movl    $1f,(%eax)      /* return address */
+
+       pushl   %eax            /* stack */
+       pushl   20(%esp)        /* flags */
+       pushl   $0              /* dummy return address */
+
+       SYSTRAP(__clone)
+       jc      4f
+       cmpl    $0,%eax
+       jne     2f              /* we're the parent */
+       jmp     *%ebp           /* this is the clone, jump to the function */
+1:
+       pushl   %eax            /* clone does _exit(func(arg)); */
+#ifdef PIC
+       PIC_PROLOGUE
+       call    PIC_PLT(_C_LABEL(_exit))
+       PIC_EPILOGUE
+#else
+       call    PIC_PLT(_C_LABEL(_exit))
+#endif
+
+2:
+       addl    $12,%esp
+       popl    %ebp
+       ret
+3:
+       movl    $EINVAL,%eax
+       jmp     5f
+4:
+       addl    $12,%esp
+5:
+       popl    %ebp
+#ifdef PIC
+       PIC_PROLOGUE
+       movl    PIC_GOT(CERROR),%edx
+       PIC_EPILOGUE
+       jmp     *%edx
+#else
+       jmp     CERROR
+#endif