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
_sbrk(int incr)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
link(char * old,char * new)95 extern int link(char *old, char *new)
96 {
97 return -1;
98 }
99
_close(int file)100 extern int _close(int file)
101 {
102 return -1;
103 }
104
_fstat(int file,struct stat * st)105 extern int _fstat(int file, struct stat *st)
106 {
107 st->st_mode = S_IFCHR;
108
109 return 0;
110 }
111
_isatty(int file)112 extern int _isatty(int file)
113 {
114 return 1;
115 }
116
_lseek(int file,int ptr,int dir)117 extern int _lseek(int file, int ptr, int dir)
118 {
119 return 0;
120 }
121
_exit(int status)122 extern void _exit(int status)
123 {
124 printf("Exiting with status %d.\n", status);
125
126 for (;;);
127 }
128
_kill(int pid,int sig)129 extern void _kill(int pid, int sig)
130 {
131 return;
132 }
133
_getpid(void)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