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