lr-gpsp giving "Illegal Instruction" on Raspberry Pi models 0W, 3B and 4.

Retro-Dee

Compiling the code with the mentioned methods doesn't work in any way, you end up receiving "Illegal Instruction".
What I did to temporarily solve this problem is to use a previous build of the gpsp_libretro.so binary and just as expected, it works!

xgaia

@Retro-Dee can we have this old build ?

juchong

Hi folks, here's the 4.5 binary: https://github.com/libretro/gpsp/issues/71#issuecomment-633748977

To install, unzip the file and transfer gpsp_libretro.so to your Pi. Replace the file in /opt/retropie/libretrocores/lr-gpsp/ with the version I've posted. Be sure to set the file permissions to 755 by issuing this command: sudo chmod 755 /opt/retropie/libretrocores/lr-gpsp/gpsp_libretro.so

Hope this helps!

BuZz

I did look into this btw but need to revisit. Using older GCC on buster still caused the issue so need to debug further with gdb.

TechieAndroid

I can confirm that the older working version still runs at full speed. So that's nice.

I'm going to install Arch on one of my Pi 0 W's and compile the latest lr-gpsp binary, I'll post it as soon as I can.

Lhimo

Is the binary working on Pi0W as well? I can't get it to launch.

oscarw

Replacing the core worked... for a while. As soon as I started playing Shrek 2 it restarted after a while of playing. Switching back to lr-mgba it fixed that problem. But lr-mgba is super slow on Pi0W so that is not an option. Does anyone have any suggestion to way it keeps restarting?

losingteam85

@juchong I tried getting in through WinSCP and overwriting the old gpsp_libreto.sp , but the system said "Permission Denied Error Code 3." Have you seen this, and do you know how I can give myself permission? Thanks!

mitu

@losingteam85 Using an old version shouldn't be needed anymore, try to update and use the latest lr-gpsp.

losingteam85

@mitu I was able to update from source, tried it, restarted my system again, and still lr-gpsp won't load my GBA roms. I'm still getting the "line 1255: 2706 Illegal instruction" problem. The games do seem to work in lr-mgba. Not sure what's up. Thanks for your help!

mitu

@losingteam85 Try updating RetroPie-Setup first, then install again from source.

losingteam85

@mitu That worked, thanks!

bebeidon

@mitu Hi, I hope it's appropriate to answer to this post.
I'm using a Pi 0 with Retropie Version 4.5.1 on Stretch.
lr-gpsp runs well for most games but some like Mario Golf restart after a short time (I think this is related to the BIOS). I have the gba bios in the BIOS folder and it's recognized by mGBA too.
So I figured I try to fix it by updating (first the Retropie-Setup Script, then the emulator).
Now the performance of lr-gpsp is very bad and the problem is still present.
Is this fixable on Stretch? i don't want the new image because the cheevos badges look bad on the little screen.

mitu

@bebeidon said in lr-gpsp giving "Illegal Instruction" on Raspberry Pi models 0W, 3B and 4.:

Is this fixable on Stretch? i don't want the new image because the cheevos badges look bad on the little screen.

Not sure what the problem is on Stretch (this topic is about lr-gpsp on the new release, based on Buster), but Stretch it's no longer supported, unfortunately. What do you mean by the cheevos 'looking bad' - is it the new notification style in RetroArch ? You can turn them off or use the previous notification style I think.

bebeidon

@mitu yes thank you i found out about that(using the old style).

Now i tried to fix lr-gpsp by updating it on a buster and a stretch image from source but on both i still have the same error with Mario Golf on GBA, that it restarts when i should select my player right at the start. When updating on buster I did not update the underlying kernel etc. Now on my latest try I updated the kernel to when getting asked in the update process, but now it seems to be stuck on the installation from the lr-gpsp from source:
"warning: BSD_SOURCE and SUID_SOURCE are deprecated, use DEFAULT_SOURCE
I was so hoping that this fix would work at least on the buster image, I really don't know how to fix this issue now.

mitu

@bebeidon This seems an issue with that particular game and not - in general - with lr-gpsp- maybe a bad ROM missing/incorrect BIOS ?.

You should open a separate topic and provide the details about your setup, as detailed in https://retropie.org.uk/forum/topic/3/read-this-first.

bebeidon

@mitu ok but yes, i tried different roms and the bios is there and correct, validatd the hash. it is getting recognized by mGBA too. i thought maybe it's related so i answered in this thread. It really seems like a BIOS problem though because at first start there is no gba intro only after the restart and the following restarts the intro appears, really weird problem. Are there other known gba roms with skip-intro problems maybe so i could test those?