/* 
 * Copyright 2010 Stefan Lankes, Chair for Operating Systems,
 *                               RWTH Aachen University
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * This file is part of MetalSVM. 
 */

#include "config.h"
#include <_syslist.h>
#include <errno.h>
#undef errno
extern int errno;

void *
sbrk (incr)
     int incr;
{ 
	extern char _end; // set by linker
	static char *heap_end = NULL;
	char *prev_heap_end;

	if (!heap_end)
		heap_end = &_end;
	prev_heap_end = heap_end;
	heap_end += incr;

	return (void *) prev_heap_end;
}