b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
59 lines
2.4 KiB
ArmAsm
59 lines
2.4 KiB
ArmAsm
/* $NetBSD: alloca.S,v 1.6 2003/08/07 16:42:10 agc Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* the Systems Programming Group of the University of Utah Computer
|
|
* Science Department.
|
|
*
|
|
* 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. Neither the name of the University 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 REGENTS 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 REGENTS 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 <machine/asm.h>
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
RCSID("from: @(#)alloca.s 5.1 (Berkeley) 5/12/90")
|
|
#else
|
|
RCSID("$NetBSD: alloca.S,v 1.6 2003/08/07 16:42:10 agc Exp $")
|
|
#endif
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
/* like alloc, but automatic free in return */
|
|
|
|
ENTRY(alloca)
|
|
movl %sp@,%a1 /* save return addr */
|
|
movl %sp,%d0 /* get current SP value */
|
|
subl %sp@(4),%d0 /* allocate requested space */
|
|
andb #~3,%d0 /* longword align for efficiency */
|
|
addql #8,%d0 /* reuse space of call frame */
|
|
movl %d0,%sp /* set new SP value */
|
|
lea %sp@(-4),%sp /* account for argument pop in caller */
|
|
#ifdef __SVR4_ABI__
|
|
moveal %d0,%a0
|
|
#endif
|
|
jmp %a1@ /* funny return */
|