From: Gustavo Zacarias <gustavo@zacarias.com.ar>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH] arch/arm: add support for thumb(1) mode
Date: Wed, 17 Jul 2013 13:03:56 -0300 [thread overview]
Message-ID: <51E6C06C.8070300@zacarias.com.ar> (raw)
In-Reply-To: <20130717175838.2fc2831e@skate>
On 07/17/2013 12:58 PM, Thomas Petazzoni wrote:
> I think this is misleading: Thumb doesn't allow to mix 16 bits and 32
> bits instructions like Thumb2 does. IIRC, with Thumb, a particular
> function needs to be either completely Thumb (16 bits) or completely
> ARM (32 bits), and there is the thumb-interworking mechanism between
> the two.
>
> Which leads me to this question: is adding Thumb support as simple as
> what you're adding? Aren't there some additional thumb-interworking
> complexities to handle?
http://infocenter.arm.com/help/topic/com.arm.doc.ihi0042e/IHI0042E_aapcs.pdf
Section 5.6 is of interest, once OABI (APCS) was dropped interworking
isn't that hard since it's mandatory for AAPCS.
Regards.
next prev parent reply other threads:[~2013-07-17 16:03 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-17 15:39 [Buildroot] [PATCH] arch/arm: add support for thumb(1) mode Gustavo Zacarias
2013-07-17 15:58 ` Thomas Petazzoni
2013-07-17 16:03 ` Gustavo Zacarias [this message]
2013-07-17 19:58 ` Thomas Petazzoni
2013-07-17 22:25 ` Gustavo Zacarias
2013-07-18 7:19 ` Thomas Petazzoni
2013-07-18 11:08 ` Gustavo Zacarias
2013-07-18 11:24 ` Thomas Petazzoni
2013-07-18 8:10 ` Peter Korsgaard
2013-07-18 16:07 ` Gustavo Zacarias
2013-07-18 22:32 ` Peter Korsgaard
2013-07-18 22:46 ` Gustavo Zacarias
2013-07-19 8:19 ` Peter Korsgaard
2013-07-19 13:06 ` Gustavo Zacarias
2013-07-17 22:22 ` Peter Korsgaard
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