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