annotate src/syscall.c @ 7:72c6429ae953
changed all the copyright headers and added a README
author |
John Tsiombikas <nuclear@member.fsf.org> |
date |
Fri, 18 Apr 2014 02:04:46 +0300 |
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c50064b181c2 |
children |
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nuclear@0
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1 /*
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2 gbasys - a gameboy advance hardware abstraction library
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3 Copyright (C) 2004-2014 John Tsiombikas <nuclear@member.fsf.org>
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation, either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 */
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18 #include "config.h"
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19
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20 #include <stdio.h>
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21 #include <stdarg.h>
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22 #include "syscall.h"
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23
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24 void halt(void)
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25 {
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26 __syscall(2);
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27 }
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28
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29 void stop(void)
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30 {
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31 __syscall(3);
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32 }
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33
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34 void print_vba(const char *str, ...)
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35 {
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36 char buf[128];
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37 va_list arg_list;
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38
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39 va_start(arg_list, str);
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40 vsnprintf(buf, 128, str, arg_list);
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41 va_end(arg_list);
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42
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43 __asm__ __volatile__(
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44 "mov r0, %0\n\t"
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45 "swi 0xff0000\n\t" :
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46 : "r" (buf)
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47 : "r0"
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48 );
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49 }
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