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Re: Debugging 32 bit ARM guests running under QEMU KVM on 64 bit ARM hos


From: Alex Bennée
Subject: Re: Debugging 32 bit ARM guests running under QEMU KVM on 64 bit ARM hosts with gdb
Date: Tue, 12 Jan 2021 12:26:50 +0000
User-agent: mu4e 1.5.7; emacs 28.0.50

alarson@ddci.com writes:

>> From: "Berto Furth" <bertofurth@sent.com>
>> To: qemu-discuss@nongnu.org
>> Date: 01/08/2021 05:48 AM
>> Subject: Debugging 32 bit ARM guests running under QEMU KVM on 64 
>> bit ARM hosts with gdb
>
>> I have noticed that when debugging a 32 bit arm (AA32) kvm guest 
>> running in a 64 bit ARM (aarch64 / AA64) host with "qemu-system-
>> aarch64" and the "aarch64=off" flag set that a remote gdb debugger 
>> still thinks that it's debugging ARM64. ...
>
> Just FYI, my group has been maintaining a similar patch so we can debug
> 32-bit guests.  I don't have qemu commit privileges (and I shouldn't),
> but I would be willing to support this activity in terms of testing
> patches, which I can do on arm, ppc, and x86 guests.  We haven't updated
> to recent QEMU versions recently, but for this I would.

Re-reading the old thread I think this stalled because it wasn't
entirely clear moving the gdbstub initialisation in the second patch was
the cleanest way to deal with things.

Does you patch take a similar approach?

-- 
Alex Bennée



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