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/*
* Copyright (c) 2021 hpmicro
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
#ifdef __GNUC__
#include <stdio.h>
#include <errno.h>
#include "hpm_common.h"
void *_sbrk(int incr)
{
extern char __heap_start__, __heap_end__;
static char *heap_end;
char *prev_heap_end;
void *ret;
if (heap_end == NULL)
{
heap_end = &__heap_start__;
}
prev_heap_end = heap_end;
if ((unsigned int)heap_end + (unsigned int)incr > (unsigned int)(&__heap_end__))
{
errno = ENOMEM;
ret = (void *)-1;
}
else
{
heap_end = (char *)((unsigned int)heap_end + (unsigned int)incr);
ret = (void *)prev_heap_end;
}
return ret;
}
#endif
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