Debugging Raspberry PI with gdb-multiarch

ppreininger · wrote on 4 Apr 2018, 19:41

Hi,
I have Cross compiled a toolchain for the Raspberry PI3 unter Arch labs Linux. Deploy and everything works, debugging can be done with gdb-mulitarch. Unfortunately, the gdb requires specification of an additional startup command (set gnutarget elf32-littlearm). If specified, deploy and debug to the Raspberry works fine, but then the Desktop debugging does not work anymore. Without setting the command, gdb tells me that there is an ambiguous file format (elf32-littlearm, elf32-littlearm-symbian elf32-littlearm-vxworks).
Is there a way to specify the command for the kit only or maybe remove the other formats from gdb-multiarch? Sorry if I should better post that question in a gdb forum, but thank you for your help anyway.

mrjj · wrote on 4 Apr 2018, 20:19

Hi
Creator as a gdb console/shell that allows live/runtime parameters.
I use it to skip std:.vector etc.
Im wondering if you can use that for inserting
set gnutarget elf32-littlearm
http://doc.qt.io/qtcreator/creator-debug-mode.html#directly-interacting-with-native-debuggers

I assume if you write in here

Its the case where it breaks the "Desktop debugging" part ?

ppreininger · 4 Apr 2018, 21:05

Yes, I already used this and it works. The only problem is that this setting is global and not limited to the Kit used, therefore debugging the project in the Desktop version does not work anymore.

mrjj · 4 Apr 2018, 21:05

@ppreininger
Ok. as i assumed.
I never did find same sort of setting pr kit so we resorted to live pasting it but
im not sure if your "set gnutarget " must be run before attach.

Did you look into using a .gdbinit file ?
You might be able to pass -x path to init file and use different settings that way but
i didnt test it.

ppreininger · wrote on 4 Apr 2018, 21:55

Thanks, I'll have a try tomorrow

ppreininger · wrote on 5 Apr 2018, 18:16

Didn't work unfortunately. Does not matter. I'll manage. Thank you