Mercurial > sdl-ios-xcode
view src/video/windib/SDL_vkeys.h @ 1176:dd2a8deeb26d
Date: Mon, 17 Oct 2005 20:09:03 -0400
From: Mark Schreiber <mark7@alumni.cmu.edu>
To: ryan@clutteredmind.org
Subject: [PATCH]SDL mprotect() crash fix
(I'm going to throw this patch your way at the suggestion of #SDL --
for some reason, I had some difficulty sending it to the main list
last time, and I go bonkers subscribing to send each email or
patch...)
Currently, when I run SDL applications as non-root using
SDL_VIDEODRIVER=dga, the fbdev fallback mprotect()s read/write the
proper size of mmapped /dev/fb0 (7.5MB), but on framebuffer release
mprotect()s read-only the range by the entire size of my video memory
(128MB), which causes a segfault:
#0 0x002a9a27 in ?? () from /lib/libc.so.6
#1 0x04a63eb6 in SDL_XDGAUnmapFramebuffer (screen=3D0) at XF86DGA2.c:978
#2 0x04a63efc in SDL_XDGACloseFramebuffer (dpy=3D0x9d3f008, screen=3D0)
at XF86DGA2.c:268
#3 0x04a68b57 in DGA_Available () at SDL_dgavideo.c:98
#4 0x04a53677 in SDL_VideoInit (driver_name=3D0xbfb0bfc7 "dga", flags=3D0)
at SDL_video.c:180
#5 0x04a2613f in SDL_InitSubSystem (flags=3D32) at SDL.c:74
#6 0x04a2617c in SDL_Init (flags=3D32) at SDL.c:166
#7 0x08049722 in main (argc=3D1, argv=3D0x0) at testwin.c:32
This is SDL 1.2.8 on Fedora Core 4, radeon driver for a Radeon 9250,
xorg-x11-6.8.2-37.
I've attached a one-line patch against SDL CVS that updates the size
of the framebuffer at framebuffer map time so that the mprotect() on
unmap will be the same size. I'm not sure if this is the best
approach (i.e. one might want to retain the original value), but it
does make my SDL applications work without segfaulting.
-- Best of luck, Mark Schreiber
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Sat, 19 Nov 2005 18:57:00 +0000 |
parents | b8d311d90021 |
children | 7c7ddaf195bf |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif #ifndef VK_0 #define VK_0 '0' #define VK_1 '1' #define VK_2 '2' #define VK_3 '3' #define VK_4 '4' #define VK_5 '5' #define VK_6 '6' #define VK_7 '7' #define VK_8 '8' #define VK_9 '9' #define VK_A 'A' #define VK_B 'B' #define VK_C 'C' #define VK_D 'D' #define VK_E 'E' #define VK_F 'F' #define VK_G 'G' #define VK_H 'H' #define VK_I 'I' #define VK_J 'J' #define VK_K 'K' #define VK_L 'L' #define VK_M 'M' #define VK_N 'N' #define VK_O 'O' #define VK_P 'P' #define VK_Q 'Q' #define VK_R 'R' #define VK_S 'S' #define VK_T 'T' #define VK_U 'U' #define VK_V 'V' #define VK_W 'W' #define VK_X 'X' #define VK_Y 'Y' #define VK_Z 'Z' #endif /* VK_0 */ /* These keys haven't been defined, but were experimentally determined */ #define VK_SEMICOLON 0xBA #define VK_EQUALS 0xBB #define VK_COMMA 0xBC #define VK_MINUS 0xBD #define VK_PERIOD 0xBE #define VK_SLASH 0xBF #define VK_GRAVE 0xC0 #define VK_LBRACKET 0xDB #define VK_BACKSLASH 0xDC #define VK_RBRACKET 0xDD #define VK_APOSTROPHE 0xDE #define VK_BACKTICK 0xDF