From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: force linker to use PIC veneers
Date: Thu, 26 Mar 2015 12:22:04 +0000 [thread overview]
Message-ID: <20150326122203.GG8656@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <CAKv+Gu8ktOUcQrGOwMfbt8s2QG+RFdnKBykVfhXPTLSUFtWQyA@mail.gmail.com>
On Thu, Mar 26, 2015 at 01:20:16PM +0100, Ard Biesheuvel wrote:
> On 26 March 2015 at 12:36, Russell King - ARM Linux
> <linux@arm.linux.org.uk> wrote:
> > On Wed, Mar 25, 2015 at 10:46:14AM +0000, Dave Martin wrote:
> >> Hmmm, you seem to be right.
> >>
> >> Thumb has no bx <label> instruction, and veneers introduced by ld are
> >> always ARM code, so this looks tricky to avoid without patching ld.
> >>
> >> As you observe, this only impacts large kernels anyway.
> >>
> >> So,
> >>
> >> Reviewed-by: Dave Martin <Dave.Martin@arm.com>
> >
> > Someone needs to check what the result is like for older CPUs too.
> >
>
> Any specific concerns? The --pic-veneer switch dates back to 2009, so
> it's been around for a while
BX. Not every CPU supports BX.
--
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next prev parent reply other threads:[~2015-03-26 12:22 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-24 10:16 [PATCH] ARM: force linker to use PIC veneers Ard Biesheuvel
2015-03-24 12:22 ` Dave Martin
2015-03-24 12:50 ` Ard Biesheuvel
2015-03-24 13:54 ` Dave Martin
2015-03-24 14:04 ` Ard Biesheuvel
2015-03-24 15:23 ` Nicolas Pitre
2015-03-24 17:35 ` Ard Biesheuvel
2015-03-25 10:46 ` Dave Martin
2015-03-26 11:36 ` Russell King - ARM Linux
2015-03-26 12:20 ` Ard Biesheuvel
2015-03-26 12:22 ` Russell King - ARM Linux [this message]
2015-03-26 12:24 ` Ard Biesheuvel
2015-03-26 12:53 ` Dave P Martin
2015-03-26 13:05 ` Ard Biesheuvel
2015-03-26 13:19 ` Dave P Martin
2015-03-27 0:01 ` Ard Biesheuvel
2015-03-30 12:06 ` Dave P Martin
2015-03-24 15:16 ` Nicolas Pitre
2015-03-24 15:23 ` Ard Biesheuvel
2015-03-24 15:49 ` Nicolas Pitre
2015-03-24 15:51 ` Ard Biesheuvel
2015-03-24 23:25 ` Russell King - ARM Linux
2015-03-24 23:30 ` Ard Biesheuvel
2015-03-24 15:41 ` Ard Biesheuvel
2015-03-24 16:42 ` Nicolas Pitre
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