/*      $NetBSD: brk.S,v 1.2 2006/09/23 17:39:34 cherry Exp $   */

/*
 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 * 
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#include <machine/asm.h>
/* __FBSDID("$FreeBSD: src/lib/libc/ia64/sys/brk.S,v 1.4 2003/05/16 21:26:39 marcel Exp $"); */

#include "SYS.h"

        .globl  _end
IMPORT(__curbrk, 8)

        .data
EXPORT(__minbrk)
        .quad   _end

        .text
ENTRY(_brk, 1)
        add     r14=@ltoff(__minbrk),gp ;;
        ld8     r14=[r14] ;;
        ld8     r14=[r14] ;;
        cmp.ltu p6,p0=r32,r14 ;;
(p6)    mov     r32=r14 ;;
        st8     [sp]=r32
        CALLSYS_ERROR(break)
        ld8     r15=[sp]
        add     r14=@ltoff(__curbrk),gp ;;
        ld8     r14=[r14] ;;
        st8     [r14]=r15
        mov     ret0=0
        br.ret.sptk.few rp
END(_brk)