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      1  1.1  ragge /*-
      2  1.1  ragge  * Copyright (c) 1991, 1993
      3  1.1  ragge  *	The Regents of the University of California.  All rights reserved.
      4  1.1  ragge  *
      5  1.1  ragge  * Redistribution and use in source and binary forms, with or without
      6  1.1  ragge  * modification, are permitted provided that the following conditions
      7  1.1  ragge  * are met:
      8  1.1  ragge  * 1. Redistributions of source code must retain the above copyright
      9  1.1  ragge  *    notice, this list of conditions and the following disclaimer.
     10  1.1  ragge  * 2. Redistributions in binary form must reproduce the above copyright
     11  1.1  ragge  *    notice, this list of conditions and the following disclaimer in the
     12  1.1  ragge  *    documentation and/or other materials provided with the distribution.
     13  1.3    agc  * 3. Neither the name of the University nor the names of its contributors
     14  1.1  ragge  *    may be used to endorse or promote products derived from this software
     15  1.1  ragge  *    without specific prior written permission.
     16  1.1  ragge  *
     17  1.1  ragge  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     18  1.1  ragge  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19  1.1  ragge  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     20  1.1  ragge  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     21  1.1  ragge  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  1.1  ragge  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     23  1.1  ragge  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  1.1  ragge  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  1.1  ragge  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  1.1  ragge  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  1.1  ragge  * SUCH DAMAGE.
     28  1.1  ragge  */
     29  1.1  ragge 
     30  1.4   matt #include "DEFS.h"
     31  1.4   matt 
     32  1.1  ragge #if defined(LIBC_SCCS) && !defined(lint)
     33  1.1  ragge 	/* .asciz "@(#)alloca.s	8.1 (Berkeley) 6/4/93" */
     34  1.5    chs RCSID("$NetBSD: alloca.S,v 1.5 2011/11/21 16:17:48 chs Exp $")
     35  1.1  ragge #endif /* LIBC_SCCS and not lint */
     36  1.1  ragge 
     37  1.1  ragge ENTRY(alloca, 0)
     38  1.2   matt 	movl	4(%ap),%r0	# get allocation size
     39  1.5    chs 	movl	16(%fp),%r1	# save return address before we smash it
     40  1.2   matt 	movab	here,16(%fp)
     41  1.1  ragge 	ret
     42  1.1  ragge here:
     43  1.2   matt 	subl2	%r0,%sp		# create stack space
     44  1.2   matt 	bicl2	$3,%sp		# align to longword boundary
     45  1.2   matt 	movl	%sp,%r0
     46  1.5    chs 	jmp	(%r1)
     47  1.4   matt END(alloca)
     48