forums.ps2dev.org

[m0skit0]

I've tried but can't get it work...

Tried the sample coming with the PSPSDK, tranformed it into a kernel mode PRX and used it as a plugin. It kind of worked as the regdump appeared. Back to VSH I ran a homebrew with an exception (using _sw(0,0)). Nothing, PSP just froze and shut down.

I've used an EBOOT that loads a kernel mode PRX that also uses pspDebugInstallErrorHandler, then generate an exception from the EBOOT. Just freezes and reboots.

Tried generating the exception from the PRX... Same thing...

Can somebody explain me what I'm doing wrong here?
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[TyRaNiD]

The exception handler in the sdk is abit old now, it doesn't really work in most scenarios, it only worked before because of the fact that kernel ELFs were loaded into user memory regions.

You should use psplink unless you have a good reason not to, otherwise you might need to use psplink's exception code instead and use that in a kernel prx.

[J.F.]

There's a kernel mode prx already out that works with current user mode homebrew. Do a search of old threads. You'll find examples of using it in DaedalusX64 and dosbox.

[m0skit0]

Thanks for the replies, guys.

@Tyranid: I've tried using psplink ([offtopic]the best homebrew ever in my opinion, with prxtool; excellent job, man[/offtopic]) several times, both in Linux (Ubuntu 9.04) and Windows (XP Pro SP2), with the same result: errors xD

I got a ta88v3 with CFW Enabler, and that's how I proceed:

I run usbhostfs_pc y pspsh in different terminals

$ ./usbhostfs_pc

[TyRaNiD]

Odd that, never seen that before. You aren't already running the psplink prx as a plugin or something strange are you as that error code kind of implies the library is already there.

Then again I have never tried it with CF Enabler, people have said they have had psplinkusb running on a PSP-3000 before now so I guess it might work, maybe.

[J.F.]

I mean this: http://forums.ps2dev.org/viewtopic.php?t=9591

That thread links to the post where crazyc first posted the exception prx that people like DX64 are using. It also has the prx and related files in a rar as well.

[m0skit0]

@TyRaNiD: I'm running both prxes as plugins; that's what CFE says anyway. The library is already there? How could that be? :P

And yeah, people use psplink on 3K, I know a few. But man, I can't... :P

@J.F.: yeah, just the post I told you about. I downloaded and tried the exception.prx file, but no way, same behaviour :( Tried as plugin, and as a kernel module loaded by an EBOOT. Here's the code I'm using (maybe I'm missing something here...):

[J.F.]

Well, the exception handler prx IS a kernel level prx - mayhap the ChickHEN CFW thingy can't handle that.

[m0skit0]

Ok then it should load in kernel mode. I've tried other kernel modules (such as a kernel memory dumper) and they worked just fine...

I don't know what the hell is going on here... But I'm getting a hackable PSP this same week xD

And also, how would I recompile PSPLink? Can't find the sources for the plugins.
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[Kreationz]

In DX64 the BSOD's are created by the exception handler, but I personally make sure I can recreate the error then I use psp-gdb to find the code which is causing the error. I've found both to be a very useful tools.

[m0skit0]

I've finally managed to make my own exception hanlder, but it lacks some functionality I would be happy someone enlightens me about it.

I used the pspsdk exception sample and transformed it into a PRX, then used it as a game plugin with CFW Enabler. But the problem is that when a load an EBOOT with an exception trigger such as _sw(0,0) or asm("break"), the PSP keeps freezing, just like the plugin wasn't loaded or something. But when the exception is called inside the plugin, the exception handler is called perfectly.

So how can this be? :P

Thanks again!
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[J.F.]

It's a huge pain to do things like printing at the exception level. That's why the exception PRX that's part of DX64 we were talking about redirects the exception to a user function in the program, so that IT can do the printing instead.

[m0skit0]