annotate src/syscall.c @ 0:875ef6085efc
gbasys mercurial repository
| author |
John Tsiombikas <nuclear@member.fsf.org> |
| date |
Sun, 04 Mar 2012 04:04:25 +0200 |
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c50064b181c2 |
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line source |
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1 /*
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2 Copyright 2004 John Tsiombikas <nuclear@siggraph.org>
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3
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4 This file is part of libgba, a library for GameBoy Advance development.
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5
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6 This program is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2 of the License, or
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9 (at your option) any later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with this program; if not, write to the Free Software
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18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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19 */
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20
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21 #include "libgba_config.h"
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22
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23 #include <stdio.h>
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24 #include <stdarg.h>
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25 #include "syscall.h"
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26
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27 void halt(void) {
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28 __syscall(2);
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29 }
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30
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31 void stop(void) {
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32 __syscall(3);
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33 }
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34
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35 void print_vba(const char *str, ...) {
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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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