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Date: Tue, 20 Jul 2021 00:57:51 +0200
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Wedson Almeida Filho <wedsonaf@google.com>
Cc: Linus Walleij <linus.walleij@linaro.org>,
	Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
	Greg KH <greg@kroah.com>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	Kees Cook <keescook@chromium.org>, Jan Kara <jack@suse.cz>,
	James Bottomley <James.Bottomley@hansenpartnership.com>,
	Julia Lawall <julia.lawall@inria.fr>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Roland Dreier <roland@kernel.org>, ksummit@lists.linux.dev,
	Viresh Kumar <viresh.kumar@linaro.org>
Subject: Re: [TECH TOPIC] Rust for Linux
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In-Reply-To: <YPV7DTFBRN4UFMH1@google.com>

Hello,

On 19/07/2021 14:15:57+0100, Wedson Almeida Filho wrote:
> On Mon, Jul 19, 2021 at 01:24:49PM +0100, Wedson Almeida Filho wrote:
> > On Fri, Jul 09, 2021 at 12:13:25AM +0200, Linus Walleij wrote:
> > > I have seen that QEMU has a piece of code for the Arm PrimeCell
> > > PL061 GPIO block which corresponds to drivers/gpio/gpio-pl061.c
> > > Note that this hardware apart from being used in all Arm reference
> > > designs is used on ARMv4T systems that are not supported by
> > > LLVM but only GCC, which might complicate things.
> > 
> > Here is a working PL061 driver in Rust (converted form the C one):
> > https://raw.githubusercontent.com/wedsonaf/linux/pl061/drivers/gpio/gpio_pl061_rust.rs
> 
> I'm also attaching an html rending of the C and Rust versions side by side where
> I try to line the definitions up to make it easier to contrast the two
> implementations.

I'd love to have a side by side disassembly of the generated object
files (ideally intermixed with the source).


-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com