Mercurial > sdl-ios-xcode
view src/video/svga/SDL_svgavideo.h @ 4355:9b464226e541 SDL-1.2
Fixed bug #855
Ludwig Nussel 2009-10-18 06:31:52 PDT
an mprotect call was added to fix bug 528. However that results in a buffer
that allows writing and code execution. Ie the no-execute security features of
modern operating systems are defeated this way. Two mprotect calls are needed.
One to make the buffer executable but not writeable when done and another one
to make the buffer writeable again if the content needs to be changed.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 18 Oct 2009 17:31:37 +0000 |
parents | a1b03ba2fcd0 |
children |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" #ifndef _SDL_svgavideo_h #define _SDL_svgavideo_h #include "SDL_mouse.h" #include "../SDL_sysvideo.h" /* Hidden "this" pointer for the video functions */ #define _THIS SDL_VideoDevice *this /* Private display data */ struct SDL_PrivateVideoData { #define NUM_MODELISTS 4 /* 8, 16, 24, and 32 bits-per-pixel */ int SDL_nummodes[NUM_MODELISTS]; SDL_Rect **SDL_modelist[NUM_MODELISTS]; int *SDL_vgamode[NUM_MODELISTS]; /* information for double-buffering */ int flip_page; int flip_offset[2]; Uint8 *flip_address[2]; /* Set to 1 if we're in banked video mode */ int banked; }; /* Old variable names */ #define SDL_nummodes (this->hidden->SDL_nummodes) #define SDL_modelist (this->hidden->SDL_modelist) #define SDL_vgamode (this->hidden->SDL_vgamode) #define flip_page (this->hidden->flip_page) #define flip_offset (this->hidden->flip_offset) #define flip_address (this->hidden->flip_address) #define banked (this->hidden->banked) #endif /* _SDL_svgavideo_h */