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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 355632dca928
children
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<HTML
><HEAD
><TITLE
>SDL_GL_LoadLibrary</TITLE
><META
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><H1
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>SDL_GL_LoadLibrary</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN2648"
></A
><H2
>Name</H2
>SDL_GL_LoadLibrary&nbsp;--&nbsp;Specify an OpenGL library</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN2651"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN2652"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="FSFUNC"
>SDL_GL_LoadLibrary</B
></CODE
>(const char *path);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN2658"
></A
><H2
>Description</H2
><P
>If you wish, you may load the OpenGL library at runtime, this must be done before <A
HREF="sdlsetvideomode.html"
><TT
CLASS="FUNCTION"
>SDL_SetVideoMode</TT
></A
> is called. The <TT
CLASS="PARAMETER"
><I
>path</I
></TT
> of the GL library is passed to <TT
CLASS="FUNCTION"
>SDL_GL_LoadLibrary</TT
> and it returns <SPAN
CLASS="RETURNVALUE"
>0</SPAN
> on success, or <SPAN
CLASS="RETURNVALUE"
>-1</SPAN
> on an error. You must then use <A
HREF="sdlglgetprocaddress.html"
><TT
CLASS="FUNCTION"
>SDL_GL_GetProcAddress</TT
></A
> to retrieve function pointers to GL functions.</P
></DIV
><DIV
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><A
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></A
><H2
>See Also</H2
><P
><A
HREF="sdlglgetprocaddress.html"
><TT
CLASS="FUNCTION"
>SDL_GL_GetProcAddress</TT
></A
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