1 /** 2 * \file 3 * 4 * \brief Syscalls for SAM (GCC). 5 * 6 * Copyright (c) 2011-2015 Atmel Corporation. All rights reserved. 7 * 8 * \asf_license_start 9 * 10 * \page License 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions are met: 14 * 15 * 1. Redistributions of source code must retain the above copyright notice, 16 * this list of conditions and the following disclaimer. 17 * 18 * 2. Redistributions in binary form must reproduce the above copyright notice, 19 * this list of conditions and the following disclaimer in the documentation 20 * and/or other materials provided with the distribution. 21 * 22 * 3. The name of Atmel may not be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * 4. This software may only be redistributed and used in connection with an 26 * Atmel microcontroller product. 27 * 28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED 29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE 31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR 32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 * 40 * \asf_license_stop 41 * 42 */ 43 /* 44 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a> 45 */ 46 47 #include <stdio.h> 48 #include <stdarg.h> 49 #include <sys/types.h> 50 #include <sys/stat.h> 51 52 /// @cond 0 53 /**INDENT-OFF**/ 54 #ifdef __cplusplus 55 extern "C" { 56 #endif 57 /**INDENT-ON**/ 58 /// @endcond 59 60 #undef errno 61 extern int errno; 62 extern int _end; 63 extern int __ram_end__; 64 65 extern caddr_t _sbrk(int incr); 66 extern int link(char *old, char *new); 67 extern int _close(int file); 68 extern int _fstat(int file, struct stat *st); 69 extern int _isatty(int file); 70 extern int _lseek(int file, int ptr, int dir); 71 extern void _exit(int status); 72 extern void _kill(int pid, int sig); 73 extern int _getpid(void); 74 75 extern caddr_t _sbrk(int incr) 76 { 77 static unsigned char *heap = NULL; 78 unsigned char *prev_heap; 79 int ramend = (int)&__ram_end__; 80 81 if (heap == NULL) { 82 heap = (unsigned char *)&_end; 83 } 84 prev_heap = heap; 85 86 if (((int)prev_heap + incr) > ramend) { 87 return (caddr_t) -1; 88 } 89 90 heap += incr; 91 92 return (caddr_t) prev_heap; 93 } 94 95 extern int link(char *old, char *new) 96 { 97 return -1; 98 } 99 100 extern int _close(int file) 101 { 102 return -1; 103 } 104 105 extern int _fstat(int file, struct stat *st) 106 { 107 st->st_mode = S_IFCHR; 108 109 return 0; 110 } 111 112 extern int _isatty(int file) 113 { 114 return 1; 115 } 116 117 extern int _lseek(int file, int ptr, int dir) 118 { 119 return 0; 120 } 121 122 extern void _exit(int status) 123 { 124 printf("Exiting with status %d.\n", status); 125 126 for (;;); 127 } 128 129 extern void _kill(int pid, int sig) 130 { 131 return; 132 } 133 134 extern int _getpid(void) 135 { 136 return -1; 137 } 138 139 /// @cond 0 140 /**INDENT-OFF**/ 141 #ifdef __cplusplus 142 } 143 #endif 144 /**INDENT-ON**/ 145 /// @endcond 146