43 lines
715 B
C
43 lines
715 B
C
/*
|
|
* 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
|