__brk.s

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/* Copyright (C) 1991, 1992, 1994 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <sysdep.h>

#ifndef	SYS_brk
#define	SYS_brk	17
#endif

#ifndef	HAVE_GNU_LD
#define	__end	_end
#endif

.data
.globl ___curbrk
___curbrk:
	.long __end

.text
ENTRY (__brk)
	movel __end, d0
	cmpl sp@(4), d0
	ble 0f
	movel d0, sp@(4)
0:	pea SYS_brk
	trap #0
	bcs 1f
	movel sp@(4), ___curbrk
	clrl d0
	rts
1:
	jmp syscall_error