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Re: [Qemu-devel] m68k gdb has stopped single stepping correctly

From: Lucien Anti-Spam
Subject: Re: [Qemu-devel] m68k gdb has stopped single stepping correctly
Date: Thu, 21 Feb 2019 07:39:08 +0000 (UTC)

 Hi Thomas,
> did you ever sent the patch? I can't find it on the mailing list, and I think 
>this bug is still pending?Yes, I have patches but was waiting for my first one 
>to be successful in order to make sure I got the process down.  I will finish 
>that shortly.
 On 24/01/2019 14.38, Alex Bennée wrote:
> Lucien Anti-Spam via Qemu-devel <address@hidden> writes:
>>    > On Thursday, January 24, 2019, 3:08:07 AM GMT+9, Emilio G. Cota 
>><address@hidden> wrote: > > On Wed, Jan 23, 2019 at 15:58:27 +0000, Lucien 
>>Anti-Spam via Qemu-devel wrote:> > Hi folks,
>>>> I noticed that with 3.x release that the GDB options (-S -s) for certain 
>>>> CPU results in very weird stepping.Usually stops afer a few steps, whilst 
>>>> the stub continues responding the PC doesnt update, however, I have only 
>>>> deeply looked at the m68k.
>>>> In the case of the m68K the SR gets the trace bit set (T=10b), and the PC 
>>>> doesnt update.The m68k gdbstub, and main gdbstub seem mostly unchanged.But 
>>>> it seems the INSN handling has changed greatly for the m68k.
>>>> Does anyone have any ideas what happened?>> Can you please bisect to find 
>>>> at which point things start misbehaving?
>>> Thanks,
>>>  Emilio
>> Understood, I was hoping my original post might jog someone's memory about 
>> the issue.
>> Apparently not, so after some digging I found that it was introduced with 
>> the refactor to TranslatorOps, specifically two lines got dropped that 
>> update the PC if single-stepping is being performed ( commit 
>> 11ab74b01e0a8ea4973eed89c6b90fa6e4fb9fb6 )
>> Since its not valid to revert, shall I go ahead and submit a patch for
>> these two lines?
> Yes please!

 Hi Lucien,

did you ever sent the patch? I can't find it on the mailing list, and I
think this bug is still pending?


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