Mercurial > sdl-ios-xcode
annotate src/SDL_loadso.c @ 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 | e9cf8c1b4590 |
children | 173c063d4f55 |
rev | line source |
---|---|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1 /* |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2 SDL - Simple DirectMedia Layer |
769
b8d311d90021
Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents:
708
diff
changeset
|
3 Copyright (C) 1997-2004 Sam Lantinga |
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4 |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5 This library is free software; you can redistribute it and/or |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
6 modify it under the terms of the GNU Library General Public |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
7 License as published by the Free Software Foundation; either |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
8 version 2 of the License, or (at your option) any later version. |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
9 |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
10 This library is distributed in the hope that it will be useful, |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
13 Library General Public License for more details. |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
14 |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
15 You should have received a copy of the GNU Library General Public |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
16 License along with this library; if not, write to the Free |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
18 |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
19 Sam Lantinga |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
20 slouken@libsdl.org |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
21 */ |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
22 |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
23 #ifdef SAVE_RCSID |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
24 static char rcsid = |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
25 "@(#) $Id$"; |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
26 #endif |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
27 |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
28 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
29 /* System dependent library loading routines */ |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
30 |
1173
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
31 /* !!! FIXME: includes so I don't have to update all the project files... */ |
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
32 #define SDL_INTERNAL_BUILDING_LOADSO 1 |
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
33 #if defined(USE_DUMMY_LOADSO) |
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
34 # include "loadso/dummy/SDL_loadso.c" |
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
35 #elif defined(MACOSX) |
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
36 # include "loadso/macosx/SDL_loadso.c" |
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
37 #elif defined(macintosh) |
1173
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
38 # include "loadso/macos/SDL_loadso.c" |
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
39 #elif defined(USE_DLOPEN) |
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
40 # include "loadso/dlopen/SDL_loadso.c" |
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
41 #elif defined(WIN32) || defined(_WIN32_WCE) |
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
42 # include "loadso/windows/SDL_loadso.c" |
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
43 #elif defined(__BEOS__) |
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
44 # include "loadso/beos/SDL_loadso.c" |
651
35ff0890ac4e
pmandin: Added Atari LDG shared object loader
Patrice Mandin <patmandin@gmail.com>
parents:
336
diff
changeset
|
45 #elif defined(__MINT__) && defined(ENABLE_LDG) |
1173
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
46 # include "loadso/mint/SDL_loadso.c" |
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
47 #else |
1173
e9cf8c1b4590
Split up src/SDL_loadso.c into platform directories.
Ryan C. Gordon <icculus@icculus.org>
parents:
1152
diff
changeset
|
48 # include "loadso/dummy/SDL_loadso.c" |
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
49 #endif /* system type */ |
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
50 |