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Message-ID: <429F7031.1000809@bellard.org>
Date: Thu, 02 Jun 2005 22:46:41 +0200
From: Fabrice Bellard <fabrice@bellard.org>
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Subject: Re: [Qemu-devel] Re: Debugging guest OS
References: <429EFEE0.4020003@agro.uba.ar> <87fyw0onk4.fsf@benpfaff.org>
	<429F23A5.5000904@agro.uba.ar>
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To: qemu-devel@nongnu.org

Mariano Wahlmann wrote:
> 
> 
> Ben Pfaff wrote:
> 
>> Mariano Wahlmann <wahlmann@agro.uba.ar> writes:
>>
>>  
>>
>>> I want to know, if it's posible to debug an guest OS like bochs, i
>>> mean disassemble current instruction, step by step running,
>>> possibility of change registers values, etc. I try to use GDB, but i
>>> think this is for debbuging qemu itself.
>>>   
>>
>>
>> You can use gdb on the guest if you invoke qemu with -s.
>>  
>>
> that's right, thanks
> but in order to disassemble i have to do "display /i $cs * 16 + $eip", 
> this is for real mode,  what is the syntaxis for protected mode?
> is there any varible that contains a pointer to current virtual address 
> of the next instruction.

In QEMU you have $pc which gives the correct value.

Fabrice.