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Re: basic qemu question

From: Alex Bennée
Subject: Re: basic qemu question
Date: Fri, 12 Jun 2020 21:14:22 +0100
User-agent: mu4e 1.5.2; emacs 28.0.50

David Beccue <david.qemulist@beccue.com> writes:

> Thanks for your thoughts on this.
> Yes, the analysis is just a library without src code that I compile into my
> firmware that runs on a Cortex-M3.
> With close to speed parity, I guess I could at least run a bunch in
> parallel on my multicore AMD 1700x more easily than loading the code in 16
> different hardware devices.

It will depend if QEMU models the device you are after. For m3 there are
mps2, stellaris and netduino2 models.

> Plus, I assume that QEMU may have a way that I
> can send debug output to my host machine to store in files there, yes?

Yes - both normal serial ports and semihosting output can be re-directed
to a file using the standard -chardev options.

> On Fri, Jun 12, 2020 at 10:29 AM Alex Bennée <alex.bennee@linaro.org> wrote:
>> The following message is a courtesy copy of an article
>> that has been posted to gmane.comp.emulators.qemu.user as well.
>> David Beccue <David-UKP4QdZF84nQT0dZR+AlfA@public.gmane.org> writes:
>> > I have a pretty basic question about how qemu works... I have an
>> > analysis library (no source) for ARM Cortex M3 processor that I'd like
>> > to run on many files.
>> The analysis library runs on the Cortex-M3?
>> > My hardware would be very slow doing
>> > this. Will QEMU be able to run this faster (assuming a fast PC, ofc)?
>> There is a fairly big performance penalty for softmmu emulation but
>> given the speed of most modern PCs compared to microcontrollers you
>> would possibly be able to achieve parity.
>> >
>> > Cheers,
>> > David
>> >
>> > - - -
>> > David Beccue
>> >
>> --
>> Alex Bennée

Alex Bennée

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