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      1  1.2  cherry /*	$NetBSD: brk.S,v 1.2 2006/09/23 17:39:34 cherry Exp $	*/
      2  1.2  cherry 
      3  1.2  cherry /*
      4  1.2  cherry  * Copyright (c) 1994, 1995 Carnegie-Mellon University.
      5  1.2  cherry  * All rights reserved.
      6  1.2  cherry  *
      7  1.2  cherry  * Author: Chris G. Demetriou
      8  1.2  cherry  *
      9  1.2  cherry  * Permission to use, copy, modify and distribute this software and
     10  1.2  cherry  * its documentation is hereby granted, provided that both the copyright
     11  1.2  cherry  * notice and this permission notice appear in all copies of the
     12  1.2  cherry  * software, derivative works or modified versions, and any portions
     13  1.2  cherry  * thereof, and that both notices appear in supporting documentation.
     14  1.2  cherry  *
     15  1.2  cherry  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  1.2  cherry  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  1.2  cherry  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  1.2  cherry  *
     19  1.2  cherry  * Carnegie Mellon requests users of this software to return to
     20  1.2  cherry  *
     21  1.2  cherry  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  1.2  cherry  *  School of Computer Science
     23  1.2  cherry  *  Carnegie Mellon University
     24  1.2  cherry  *  Pittsburgh PA 15213-3890
     25  1.2  cherry  *
     26  1.2  cherry  * any improvements or extensions that they make and grant Carnegie the
     27  1.2  cherry  * rights to redistribute these changes.
     28  1.2  cherry  */
     29  1.2  cherry 
     30  1.2  cherry #include <machine/asm.h>
     31  1.2  cherry /* __FBSDID("$FreeBSD: src/lib/libc/ia64/sys/brk.S,v 1.4 2003/05/16 21:26:39 marcel Exp $"); */
     32  1.2  cherry 
     33  1.2  cherry #include "SYS.h"
     34  1.2  cherry 
     35  1.2  cherry 	.globl	_end
     36  1.2  cherry IMPORT(__curbrk, 8)
     37  1.2  cherry 
     38  1.2  cherry 	.data
     39  1.2  cherry EXPORT(__minbrk)
     40  1.2  cherry 	.quad	_end
     41  1.2  cherry 
     42  1.2  cherry 	.text
     43  1.2  cherry ENTRY(_brk, 1)
     44  1.2  cherry 	add	r14=@ltoff(__minbrk),gp ;;
     45  1.2  cherry 	ld8	r14=[r14] ;;
     46  1.2  cherry 	ld8	r14=[r14] ;;
     47  1.2  cherry 	cmp.ltu	p6,p0=r32,r14 ;;
     48  1.2  cherry (p6)	mov	r32=r14 ;;
     49  1.2  cherry 	st8	[sp]=r32
     50  1.2  cherry 	CALLSYS_ERROR(break)
     51  1.2  cherry 	ld8	r15=[sp]
     52  1.2  cherry 	add	r14=@ltoff(__curbrk),gp ;;
     53  1.2  cherry 	ld8	r14=[r14] ;;
     54  1.2  cherry 	st8	[r14]=r15
     55  1.2  cherry 	mov	ret0=0
     56  1.2  cherry 	br.ret.sptk.few rp
     57  1.2  cherry END(_brk)
     58