71 lines
2.6 KiB
C
71 lines
2.6 KiB
C
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/*
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* The Clear BSD License
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted (subject to the limitations in the disclaimer below) provided
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* that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(__GNUC__)
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#include <stdio.h>
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#include <errno.h>
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#endif
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#if defined(__GNUC__)
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/*!
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* @brief Function to override ARMGCC default function _sbrk
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*
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* _sbrk is called by malloc. ARMGCC default _sbrk compares "SP" register and
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* heap end, if heap end is larger than "SP", then _sbrk returns error and
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* memory allocation failed. This function changes to compare __HeapLimit with
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* heap end.
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*/
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caddr_t _sbrk(int incr)
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{
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extern char end __asm("end");
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extern char heap_limit __asm("__HeapLimit");
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static char *heap_end;
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char *prev_heap_end;
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if (heap_end == NULL)
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heap_end = &end;
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prev_heap_end = heap_end;
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if ((unsigned int)heap_end + incr > (unsigned int)(&heap_limit))
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{
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errno = ENOMEM;
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return (caddr_t)-1;
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}
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heap_end = (char *)((unsigned int)heap_end + incr);
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return (caddr_t)prev_heap_end;
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}
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#endif
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