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27 lines
573 B
C
27 lines
573 B
C
/*
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* Copyright (C) 2020 Embecosm Limited
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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/* Semihosting requires that sbrk be implemented without a syscall. */
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extern char _end[]; /* _end is set in the linker command file. */
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char *heap_ptr;
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/*
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* sbrk -- changes heap size size. Get nbytes more
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* RAM. We just increment a pointer in what's
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* left of memory on the board.
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*/
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char *
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_sbrk (nbytes)
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int nbytes;
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{
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char *base;
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if (!heap_ptr)
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heap_ptr = (char *)&_end;
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base = heap_ptr;
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heap_ptr += nbytes;
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return base;
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}
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