150 lines
3.4 KiB
C
150 lines
3.4 KiB
C
/*
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Copyright (c) 2011 Arduino. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* \file syscalls_sam3.c
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*
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* Implementation of newlib syscall.
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*
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*/
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/*----------------------------------------------------------------------------
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* Headers
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*----------------------------------------------------------------------------*/
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#include "syscalls.h"
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#include <stdio.h>
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#include <stdarg.h>
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#if defined ( __GNUC__ ) /* GCC CS3 */
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#include <sys/types.h>
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#include <sys/stat.h>
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#endif
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#include "Arduino.h"
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// Helper macro to mark unused parameters and prevent compiler warnings.
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// Appends _UNUSED to the variable name to prevent accidentally using them.
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#ifdef __GNUC__
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#define UNUSED_PARAM(x) x ## _UNUSED __attribute__((__unused__))
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#else
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#define UNUSED_PARAM(x) x ## _UNUSED
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#endif
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/*----------------------------------------------------------------------------
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* Exported variables
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*----------------------------------------------------------------------------*/
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#undef errno
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extern int errno ;
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extern int _end ;
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/*----------------------------------------------------------------------------
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* Exported functions
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*----------------------------------------------------------------------------*/
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extern void _exit( int status ) ;
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extern void _kill( int pid, int sig ) ;
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extern int _getpid ( void ) ;
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static unsigned char *heap_brk = NULL;
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static unsigned char *heap_end = NULL;
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void setHeap(unsigned char *start, unsigned char *end) {
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heap_brk = start;
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heap_end = end;
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}
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extern caddr_t _sbrk ( int incr )
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{
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caddr_t prev_heap;
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if ( heap_brk == NULL )
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{
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heap_brk = (unsigned char *)&_end ;
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}
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prev_heap = (caddr_t)heap_brk;
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if (heap_end != NULL && (heap_brk + incr) > heap_end) {
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return (caddr_t)-1;
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}
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heap_brk += incr ;
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return prev_heap ;
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}
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extern int link( UNUSED_PARAM(char *cOld), UNUSED_PARAM(char *cNew) )
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{
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return -1 ;
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}
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extern int _close( UNUSED_PARAM(int file) )
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{
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return -1 ;
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}
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extern int _fstat( UNUSED_PARAM(int file), struct stat *st )
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{
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st->st_mode = S_IFCHR ;
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return 0 ;
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}
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extern int _isatty( UNUSED_PARAM(int file) )
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{
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return 1 ;
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}
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extern int _lseek( UNUSED_PARAM(int file), UNUSED_PARAM(int ptr), UNUSED_PARAM(int dir) )
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{
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return 0 ;
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}
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extern int _read(UNUSED_PARAM(int file), UNUSED_PARAM(char *ptr), UNUSED_PARAM(int len) )
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{
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return 0 ;
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}
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extern int _write( UNUSED_PARAM(int file), char *ptr, int len )
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{
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int iIndex = 0;
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for ( iIndex=0 ; iIndex < len ; iIndex++) {
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//TODO write to Serial
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}
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return iIndex ;
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}
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extern void _exit( int status )
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{
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printf( "Exiting with status %d.\n", status ) ;
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for ( ; ; ) ;
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}
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extern void _kill( UNUSED_PARAM(int pid), UNUSED_PARAM(int sig) )
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{
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return ;
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}
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extern int _getpid ( void )
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{
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return -1 ;
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}
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