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annotate src/video/nds/SDL_ndsvideo.h @ 4137:be12463f31ea SDL-1.2

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Date: Sat, 2 Feb 2008 22:08:05 +0100 From: Marcus von Appen To: sdl@lists.libsdl.org Subject: [SDL] [Patch] SDL-1.2 SDL_revcpy() asm patch for the cld flag Hi, as reported through the FreeBSD bug tracking system in SDL 1.2.13 (and in the 1.2 branch, if I see that correctly) the SDL_revcpy() macro sets the direction flag (std), but does not clear it afterwards (cld), which is wrong according to the GCC and SYS V specs. This can cause some weird side effects, which in turn can lead to memory corruption. You can read the full report with a detailed description and test program at http://www.freebsd.org/cgi/query-pr.cgi?pr=ports/120052 Attached is the submitted patch, which fixes the issue. Regards Marcus
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 04 Feb 2008 17:22:56 +0000
parents 8582c6a5ca16
children a1b03ba2fcd0
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library 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 GNU
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13 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifndef _SDL_ndsvideo_h
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25 #define _SDL_ndsvideo_h
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26
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27 #include "SDL_mouse.h"
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28 #include "../SDL_sysvideo.h"
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29
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30 /* Hidden "this" pointer for the video functions */
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31 #define _THIS SDL_VideoDevice *this
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32
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33
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34 /* Private display data */
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35
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36 struct SDL_PrivateVideoData {
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37 int w, h;
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38 void *buffer;
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39 short ndsmode;
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40 short secondbufferallocd;
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41 };
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42
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43 /*
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44 #define NDS_VIDC_BASE 0x4000000
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45 #define NDS_DISPCNT (*(volatile Uint32*)(NDS_VIDC_BASE))
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46 #define NDS_VIDC_SCANLINE (NDS_VIDC_BASE+6)
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47 #define NDS_SCANLINE (*(volatile Uint8*)(NDS_VIDC_SCANLINE))
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48
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49 #define NDS_DISP_MODE(n) (n&7)
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50 #define NDS_DISP_BG2 0x400
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51 #define NDS_DISP_FB 0x10
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52
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53 #define NDS_PAL_BASE 0x5000000
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54 #define NDS_BGPAL ((volatile Uint16*)(NDS_PAL_BASE))
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55 #define NDS_OBJPAL ((volatile Uint16*)(NDS_PAL_BASE+0x200))
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56
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57 #define NDS_VRAM_BASE 0x6000000
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58 #define NDS_VRAM_2NDBUF 0x600a000
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59 #define NDS_VRAM = ((volatile Uint16* )NDS_VRAM_BASE)
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60 */
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61 #endif /* _SDL_ndsvideo_h */