Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/lib/libc/arm/gen/alloca.S
39563 views
1
/*	$NetBSD: alloca.S,v 1.3 2003/04/05 23:08:51 bjh21 Exp $	*/

2


3
/*

4
 * Copyright (c) 1995 Mark Brinicombe

5
 * All rights reserved.

6
 *

7
 * Redistribution and use in source and binary forms, with or without

8
 * modification, are permitted provided that the following conditions

9
 * are met:

10
 * 1. Redistributions of source code must retain the above copyright

11
 *    notice, this list of conditions and the following disclaimer.

12
 * 2. Redistributions in binary form must reproduce the above copyright

13
 *    notice, this list of conditions and the following disclaimer in the

14
 *    documentation and/or other materials provided with the distribution.

15
 * 3. All advertising materials mentioning features or use of this software

16
 *    must display the following acknowledgement:

17
 *	This product includes software developed by Mark Brinicombe

18
 * 4. Neither the name of the University nor the names of its contributors

19
 *    may be used to endorse or promote products derived from this software

20
 *    without specific prior written permission.

21
 *

22
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

23
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

24
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

25
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

26
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

27
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

28
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

29
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

30
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

31
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

32
 * SUCH DAMAGE.

33
 */

34


35
/* like alloc, but automatic automatic free in return */

36


37
#include <machine/asm.h>

38
ENTRY(alloca)

39
	add	r0, r0, #0x00000007	/* round up to next 8 byte alignment */

40
	bic	r0, r0, #0x00000007

41
	sub	sp, sp, r0		/* Adjust the stack pointer */

42
	mov	r0, sp			/* r0 = base of new space */

43
	RET

44
END(alloca)

45


46
	.section .note.GNU-stack,"",%progbits

47


48