metalsvm/libgloss/sbrk.c

40 lines
1 KiB
C

/*
* 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;
}