| /** |
| ****************************************************************************** |
| * @file sysmem.c |
| * @author Auto-generated by STM32CubeIDE |
| * @brief STM32CubeIDE Minimal System Memory calls file |
| * |
| * For more information about which c-functions |
| * need which of these lowlevel functions |
| * please consult the Newlib libc-manual |
| ****************************************************************************** |
| * @attention |
| * |
| * Copyright (c) 2020-2021 STMicroelectronics. |
| * All rights reserved. |
| * |
| * This software is licensed under terms that can be found in the LICENSE file |
| * in the root directory of this software component. |
| * If no LICENSE file comes with this software, it is provided AS-IS. |
| * |
| ****************************************************************************** |
| */ |
| |
| /* Includes */ |
| #include <errno.h> |
| #include <stdio.h> |
| #include <sys/errno.h> |
| |
| /* Variables */ |
| extern int errno; |
| register char * stack_ptr asm("sp"); |
| |
| /* Functions */ |
| |
| /** |
| _sbrk |
| Increase program data space. Malloc and related functions depend on this |
| **/ |
| caddr_t _sbrk(int incr) |
| { |
| extern char end asm("end"); |
| static char * heap_end; |
| char * prev_heap_end; |
| |
| if (heap_end == 0) |
| heap_end = &end; |
| |
| prev_heap_end = heap_end; |
| if (heap_end + incr > stack_ptr) |
| { |
| errno = ENOMEM; |
| return (caddr_t) -1; |
| } |
| |
| heap_end += incr; |
| |
| return (caddr_t) prev_heap_end; |
| } |
