Re: [Free60-Devel] RE: Shaders ?
On Thu, 29 Dec 2005 02:42:52 +0100 Arne Olav [EMAIL PROTECTED] wrote: The Demo Disc containing king kong, has all it's vector shaders source code + vector source code compiled on the disc. It looks like it is loading them. Isn't this huge news? I read up on the Xenos graphics processor in this article ( http://www.beyond3d.com/articles/xenos/index.php?p=10 ): In simple terms the MEMEXPORT function is a method by which Xenos can push and pull vectorised data directly to and from system RAM. If the data containing the shaders for the king kong demo isn't signed (which it isn't if it's not inside the executables?) it could be modified to use the MEMEXPORT instruction to read and write anything to the xbox 360's unified memory and output information to the screen. It may be possible, assuming the executable doesn't check the shader's hash before loading it. --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637alloc_id=16865op=click ___ free60-devel mailing list free60-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/free60-devel
Re: [Free60-Devel] RE: Shaders ?
On 12/28/05, Bobby Bingham [EMAIL PROTECTED] wrote: On Thu, 29 Dec 2005 02:42:52 +0100 Arne Olav [EMAIL PROTECTED] wrote: The Demo Disc containing king kong, has all it's vector shaders source code + vector source code compiled on the disc. It looks like it is loading them. Isn't this huge news? I read up on the Xenos graphics processor in this article ( http://www.beyond3d.com/articles/xenos/index.php?p=10 ): In simple terms the MEMEXPORT function is a method by which Xenos can push and pull vectorised data directly to and from system RAM. If the data containing the shaders for the king kong demo isn't signed (which it isn't if it's not inside the executables?) it could be modified to use the MEMEXPORT instruction to read and write anything to the xbox 360's unified memory and output information to the screen. It may be possible, assuming the executable doesn't check the shader's hash before loading it. It also must be considered that it may not go through the hypervisor, and thus would give you the encrypted memory (as if you were reading it straight off the chips) - Cody -- Not all martyrs see divinity, but at least you tried. - Maynard James Keenan - Tool - Eulogy But if I expire today, let it be in sight of thee. - Emily Dickinson --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_idv37alloc_id865op=click ___ free60-devel mailing list free60-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/free60-devel
RE: [Free60-Devel] RE: Shaders ?
The final version of king kong still has this shader directory,with a binary inside, which contains several shaders. It does not longer contain the .hsl file though, but looking inside the .bin file, it looks like it is clearable reading there. According to the reference model of shader languages, shaders can contain array of variables, like ints. Technically that sounds like, creating a array of say 2, and trying to see what will happen if you touch position [3] I got my direct X December 2005 sdk (legally, downloadable at msdn.microsoft.com) which contains the correct high level shader compiler. continues digging : i am trying to figure out 3 things here - one, is it possible at all to mess with the shaders (simple replace blue water by red water) - two is it possible, to read from any memory location at all ,using an array overrun - Three is it possible to write to that memory also one would be fun to have two would really be useful, but i doubt if the gpu has no overrun protection and three sounds currently to impossible to believe for myself --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637alloc_id=16865op=click ___ free60-devel mailing list free60-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/free60-devel
