Search found 123 matches

by laichung
Wed Jan 27, 2010 3:04 pm
Forum: PS3 Development
Topic: geohot on the PS3 ...
Replies: 40
Views: 53373

Doubting what a hacker can do based on reading about the system is so funny. Many developers here have done more than just "read about" the system. But even just with the literature, we can have a pretty good idea of what he can do. He's glitched something either on the FlexIO bus, during...
by laichung
Wed Jan 27, 2010 2:55 pm
Forum: PS3 Development
Topic: geohot on the PS3 ...
Replies: 40
Views: 53373

How can you claim that the Slim is vulnerable to this when it doesn't have OtherOS? Half right, half wrong. Because OtherOS just give you a platform to "Run a Code" (or the right term is, inject some code on the memory space). But the exploit is based on the hole of non-ECC RAM. So of cou...
by laichung
Wed Apr 02, 2008 5:29 pm
Forum: PSP Development
Topic: 3.xx Kernel Mode!!!!
Replies: 9
Views: 5832

You didn't debug your april fools before you post it?
Big mistake~~
PiCkDaT wrote:I just firgured I'd throw something out there to make an april fools :\ but I made a fool of myself.
by laichung
Mon Mar 24, 2008 10:10 pm
Forum: PSP Development
Topic: error compiling PMP mod source v 2.02
Replies: 3
Views: 3758

Re: error compiling PMP mod source v 2.02

I would like to say, your information is not enough.
by laichung
Wed Feb 20, 2008 12:39 pm
Forum: PS3 Development
Topic: SIXAXIS under Windows
Replies: 582
Views: 900134

What do you mean "not working"? It cannot detect the pad or it cannot init after you run the init program? If it cannot detect the pad, it should be nothing you can do. If your case is, nothing happen after you run the init program, I found a source code of initiating the sixaxis. It shoul...
by laichung
Thu Dec 20, 2007 2:12 pm
Forum: PS3 Development
Topic: The hunt for HV's FIFO/Push buffer...
Replies: 463
Views: 922488

Does this matter? ps3fb: Update for firmware 2.10 As of PS3 firmware version 2.10, the GPU command buffer size must be at least 2 MiB large. Since we use only a small part of the GPU command buffer and don't want to waste precious XDR memory, move the GPU command buffer back to the start of the XDR ...
by laichung
Thu Oct 18, 2007 6:12 pm
Forum: PSP Development
Topic: A strange problem when compile gcc 4.1.0
Replies: 6
Views: 2650

use SVN to get the latest toolchain~~ the latest version is Rev 2320 - 2007-10-01 03:03:50 +1000 (Mon, 01 Oct 2007) I'm using ubuntu 7.10 rc and rebuild the toolchain almost ten times these few days, no problem at all. Is there anybody building toolchian in Ubuntu and met this problem. Please tell m...
by laichung
Mon Aug 20, 2007 11:49 pm
Forum: PS3 Linux Development
Topic: display in 1366x768
Replies: 5
Views: 8198

Even you set your resolution of your PS3 to 1366x768, doesnt mean that it can display all content, since most of the LCDTV will overscan the input source. So you better first try to use computer output 768 source to your LCDTV to test your LCD support it or not.
by laichung
Wed May 09, 2007 1:28 pm
Forum: PS3 Development
Topic: SCE File Format
Replies: 5
Views: 9282

I can tell you that, the file is signed. So even you know the format, you can modify it in your own way~

Anyway, happy hacking~
by laichung
Tue May 08, 2007 6:05 pm
Forum: PS3 Linux Development
Topic: SPE Media Lib
Replies: 39
Views: 40426

The latest ADDOn of CELL now having a document called "Cell Programming Primer", which have a section contain a sample program of rgb2y using SPE (Chapter 3 Basics of SPE Programming). For those who want to learn more about how to use SPE, check that out and you will find it is really info...
by laichung
Thu May 03, 2007 1:12 pm
Forum: PS3 Linux Development
Topic: Cryptic message from YellowDog
Replies: 24
Views: 20913

I think it has some checking process before wireless lan modules activate. Since 20g verison doesnt has the WLAN hareware. May be it is done by hypervisor function.
by laichung
Wed May 02, 2007 5:43 pm
Forum: PS3 Linux Development
Topic: Multimedia with PS3 Linux
Replies: 30
Views: 35818

Why people always think about RSX? Does it mean to you, or you want it because you dont have it?

Does RSX have any hardware acceleration for MP4 decoding? I think CELL has enough power for decoding MP4, the only matters are about HDCP and AACS.
by laichung
Wed May 02, 2007 5:36 pm
Forum: PS3 Linux Development
Topic: Hypervisor API
Replies: 23
Views: 24592

All the stuff about lv1 call is here / include / asm-powerpc / lv1call.h

And you need to read other file to find how to use those call.
Happy hacking~

Anyway, does the lv1 call limited to 256?
by laichung
Wed May 02, 2007 5:32 pm
Forum: PS3 Linux Development
Topic: Cryptic message from YellowDog
Replies: 24
Views: 20913

Somethings about storage is changed. Take a look here

PS3 ROM Storage?
PS3 FLASH ROM Storage?
What does it refer to? Of course not the firmware~
by laichung
Mon Apr 30, 2007 5:13 pm
Forum: PS3 Linux Development
Topic: PS3 'Other OS' area data.
Replies: 4
Views: 5791

Oh, yes. After read your post I do some research. That "other os area" should refer to the kboot (which is otheros.bld). Thanks~ I believe "OtherOS area" just refers to the 4MB block of flash used to store the kernel and boot parameters (compression, boot flag, etc). You can acce...
by laichung
Mon Apr 30, 2007 12:12 pm
Forum: PS3 Linux Development
Topic: PS3 'Other OS' area data.
Replies: 4
Views: 5791

PS3 'Other OS' area data.

From the source of kernel , os-area.c , I know that the "OtherOS" will copy into the memory area. So my question is, does anyone try to dump it from ram? Does it encrypted? Does it refer to the otheros.self? /** * struct saved_params - Static working copies of data from the 'Other OS' area...
by laichung
Wed Apr 25, 2007 4:34 pm
Forum: PS3 Development
Topic: Who wants 252MB more RAM for PS3 homebrew.
Replies: 70
Views: 77978

So this mean the hypervisor function only return the pointer of DDR address without any verification or standard malloc process. I think this is a serious bugs. And we know that linux kernel allocated some memory for FB when it start, why the function still return the address which overlaped with th...
by laichung
Wed Apr 25, 2007 12:33 pm
Forum: PS3 Development
Topic: Who wants 252MB more RAM for PS3 homebrew.
Replies: 70
Views: 77978

But I think GPU wont use whole 256mb ram for bitblt process. The ram for framebuffer should be fixed allocate when the kenrel is started. The point of function malloc should allocate some free memory from the RAM space. Also if those ram we allocated is overwrited by framebuffer, I think the value s...
by laichung
Tue Apr 24, 2007 6:44 pm
Forum: PS3 Development
Topic: OtherOS boot process...
Replies: 7
Views: 8673

Just a OT notes, there are different file format with filename extension PKG. For example , F@H file from the net should be a package file (with a PKG header inside the file). And from the firmware, some files like "MULTI_CARD_FIRMWARE.pkg", header is SCE. For those file which is encrypted...
by laichung
Tue Apr 24, 2007 6:21 pm
Forum: PS3 Development
Topic: Who wants 252MB more RAM for PS3 homebrew.
Replies: 70
Views: 77978

Really good one !!

Anyway, if my memory is correct, the PPU <-> GPU Ram access is very slow compare to PPU <-> Main Ram (And now with a hypervisor process between). So how useful about those extra RAM is a question. May be someone can write a benchmark program about that?
by laichung
Tue Apr 17, 2007 7:37 pm
Forum: PS3 Development
Topic: otheros.self feel to be elf file ...
Replies: 9
Views: 11636

Re: it's only because there is a data shift inside, but you

I can give you some interesting info about otheros.self If you look for hex value "BC3F7A48AF45EF283A0598103F", you will find 3 sections which having same values for some bytes (hex values of above is the start of the section), and it look like a header. What I guess about it is, 3 spe elf...
by laichung
Tue Apr 17, 2007 7:04 pm
Forum: PS3 Linux Development
Topic: otheros.self information describable ?
Replies: 4
Views: 5245

Build the binutils with CELL SDK 2.1 and you get ppu-readelf and spu-readelf


The follow has some basic inform about CESOF
http://www.embedded.com/showArticle.jht ... =188101999
by laichung
Tue Apr 17, 2007 11:10 am
Forum: PS3 Linux Development
Topic: otheros.self information describable ?
Replies: 4
Views: 5245

Re: otheros.self information describable ?

As I mention before, the ELF file used in Ps3 linux contain more sections than a standard ELF file in common linux, you need to read the CEBA handbook to look for the new section info.
by laichung
Sun Apr 15, 2007 1:35 am
Forum: PS3 Development
Topic: otheros.self feel to be elf file ...
Replies: 9
Views: 11636

you can try readelf to decode the otheros.self without the "SCE header". I dont have ppu-self or latest binutils , but my old readelf can give some correction information about the elf file (for examples, 64bit , big-endine, etc.) and these match the info from CEBA handbook. Of course some...
by laichung
Sat Apr 14, 2007 9:43 am
Forum: PS3 Development
Topic: otheros.self feel to be elf file ...
Replies: 9
Views: 11636

Yes, it is a sce + elf file otheros.self <- "self" mean sce and elf if you remove the sce header, the remain is a elf file. You can use readelf to read some headers information. (You must use ppu-readelf or spu-readelf to get the correct info) Ps3 introduction some new sections to combine ...
by laichung
Tue Apr 03, 2007 2:29 pm
Forum: PS3 Linux Development
Topic: Masters Project - cryptanalysis on PS3
Replies: 14
Views: 9470

Folding@ team already explained clearly the pros and cons of CELL with Folding@Home. In my opinion, you can only take advantage if your code is best fit with the SPU and vector programming. Otherwise CELL is only a G5 PowerPC processor. So I think directly compare CELL with x86 based CPU is meaningl...
by laichung
Tue Mar 27, 2007 11:48 am
Forum: PS3 Linux Development
Topic: Multimedia with PS3 Linux
Replies: 30
Views: 35818

Re: Multimedia with PS3 Linux

Since the linux version of VLC only using plain linux structure and didnt use any CELL technology. It should be used the PPU of the Cell only. (or part of the spu, whatever) If anyone port the libmpeg2 using spe, I think the performent will be better. (Just like you play the movie in the xmb) Hi. I ...
by laichung
Fri Feb 09, 2007 12:58 pm
Forum: PS3 Development
Topic: Cell Development Course from MIT
Replies: 0
Views: 3919

Cell Development Course from MIT

In case you are interested in develop ps3/cell application

http://cag.csail.mit.edu/ps3/lectures.shtml

This site is from MIT and contain some basic information about how to write program for cell (actually the topic is about parallel computing, but they use ps3/cell as a target machine)
by laichung
Wed Oct 11, 2006 12:31 pm
Forum: PSP Development
Topic: Suggestion: Set Tab Size in Debug Printing
Replies: 2
Views: 3097

Re: Suggestion: Set Tab Size in Debug Printing

Good suggestion. Everyone have PSPSDK source , why dont you patch it and share it with us? While using pspdebugprintf, it has the tab size set to 5. It would be nice to have a command that allows you to set the tab size yourself without having to recompile the library. It should be a really easy sug...
by laichung
Mon Oct 09, 2006 12:24 pm
Forum: PSP Development
Topic: Problem while installing toolchain under cygwin
Replies: 12
Views: 10012

Re: Problem while installing toolchain under cygwin

Again , make sure you have the lateset toolchain script. And follow the readme from the toolchain.