[Qemu-devel] Debugging u-boot after relocation on arm machie

[Qemu-devel] Debugging u-boot after relocation on arm machie

[mar.krzeminski]

Hello,

I am working on u-boot under qemu. Debugging before u-boots relocate 
itself works just fine.
After relocation and reloading elf in gdb, qemu does no stop on breakpoint.
Generally I follow this instruction:

http://www.denx.de/wiki/view/DULG/DebuggingUBoot

I am debuging  under eclipse - I'll test with clean gdb to be sure. As I 
see some topics in this list,
there is some work ongoing regarding self-modyfying code on arm and gdb 
stub.
Does someone tries to debug such applications?

Regards,
Marcin

Re: [Qemu-devel] Debugging u-boot after relocation on arm machie

[Thomas Huth]

On 07/10/15 20:32, mar.krzeminski wrote:
> Hello,
> 
> I am working on u-boot under qemu. Debugging before u-boots relocate
> itself works just fine.
> After relocation and reloading elf in gdb, qemu does no stop on breakpoint.

Are you using software breakpoints or hardware breakpoints?
In case you're using software breakpoints, maybe they get clobbered by
the relocation / reloading?

 Thomas

Re: [Qemu-devel] Debugging u-boot after relocation on arm machie

[Marcin Krzemiński]

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2015-10-08 13:22 GMT+02:00 Thomas Huth <thuth@redhat.com>:

> On 07/10/15 20:32, mar.krzeminski wrote:
> > Hello,
> >
> > I am working on u-boot under qemu. Debugging before u-boots relocate
> > itself works just fine.
> > After relocation and reloading elf in gdb, qemu does no stop on
> breakpoint.
>
> Are you using software breakpoints or hardware breakpoints?
> In case you're using software breakpoints, maybe they get clobbered by
> the relocation / reloading?
>
>  Thomas
>
> It seem that it was cause by eclipse - trace mode option.
If I set it to normal all works as it should - I can debug relocated code.
I am using sw breakpoints

Thanks,
Marcin

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