| /* |
| * 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 |
