101 lines
3.9 KiB
C
101 lines
3.9 KiB
C
/*********************************************************************************************************************
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* @file syscalls.c
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* @brief Newlib stubs
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* @version V1.6
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* @date 20 Apr 2017
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*
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* @cond
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*********************************************************************************************************************
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* Copyright (c) 2015-2017, Infineon Technologies AG
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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,are permitted provided that the
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* following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided with the distribution.
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*
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* Neither the name of the copyright holders nor the names of its contributors may be used to endorse or promote
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* products derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 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 ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY,OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* To improve the quality of the software, users are encouraged to share modifications, enhancements or bug fixes with
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* Infineon Technologies AG dave@infineon.com).
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*********************************************************************************************************************
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*
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* *************************** Change history ********************************
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* V0.1 : Initial version
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* V0.2 : Label updates
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* V1.0 : Made _sbrk device agnostic
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* V1.1 : C++ support
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* V1.2 : Restored compatibility with old project files
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* V1.3 Jan 2014, PKB : Encapsulating everything in this file for use only with GCC
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* V1.4 11 Dec 2015, JFT : Fix heap overflow
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* V1.5 09 Mar 2016, JFT : Add dso_handle to support destructors call at exit
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* V1.6 20 Apr 2017, JFT : Foward declaration of __sbrk to fix link time optimization (-flto) compilation errors
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* @endcond
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*/
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/*
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* This file contains stubs for standard C library functionality that must
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* typically be provided for the underlying platform.
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*
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*/
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#if defined ( __GNUC__ )
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#include <stdint.h>
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#include <errno.h>
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#include <sys/types.h>
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/* Forward prototypes. */
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caddr_t _sbrk(int nbytes) __attribute__((externally_visible));
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void _init(void) __attribute__((externally_visible));
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/* c++ destructor dynamic shared object needed if -fuse-cxa-atexit is used*/
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void *__dso_handle __attribute__ ((weak));
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// defined in linker script
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extern caddr_t Heap_Bank1_Start;
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extern caddr_t Heap_Bank1_End;
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caddr_t _sbrk(int nbytes)
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{
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static caddr_t heap_ptr = NULL;
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caddr_t base;
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if (heap_ptr == NULL) {
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heap_ptr = (caddr_t)&Heap_Bank1_Start;
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}
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base = heap_ptr;
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/* heap word alignment */
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nbytes = (nbytes + 3) & ~0x3U;
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if ((caddr_t)&Heap_Bank1_End > (heap_ptr + nbytes))
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{
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heap_ptr += nbytes;
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return (base);
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}
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else
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{
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/* Heap overflow */
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errno = ENOMEM;
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return ((caddr_t)-1);
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}
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}
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/* Init */
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void _init(void)
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{}
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#endif /* __GNUC__ */
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