From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Dmitry Osipenko <digetx@gmail.com>
Cc: linux-kernel@vger.kernel.org,
Nick Desaulniers <ndesaulniers@google.com>,
Kees Cook <keescook@chromium.org>,
linux-arm-kernel@lists.infradead.org,
Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH v1] ARM: vfp: Use long jump to fix THUMB2 kernel compilation error
Date: Thu, 22 Oct 2020 15:57:35 +0100 [thread overview]
Message-ID: <20201022145734.GO1551@shell.armlinux.org.uk> (raw)
In-Reply-To: <20201021225737.739-1-digetx@gmail.com>
On Thu, Oct 22, 2020 at 01:57:37AM +0300, Dmitry Osipenko wrote:
> The vfp_kmode_exception() function now is unreachable using relative
> branching in THUMB2 kernel configuration, resulting in a "relocation
> truncated to fit: R_ARM_THM_JUMP19 against symbol `vfp_kmode_exception'"
> linker error. Let's use long jump in order to fix the issue.
>
> Fixes: eff8728fe698 ("vmlinux.lds.h: Add PGO and AutoFDO input sections")
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
I guess the problem is that vfp_support_entry is in .text which tends
to be at the beginning of the text section, but vfp_kmode_exception
is in something like .text.vfp_kmode_exception ?
Would it be an idea just to change the section name that stuff like
vfp_support_entry ends up in, rather than making the code less
efficient?
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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next prev parent reply other threads:[~2020-10-22 15:02 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-21 22:57 [PATCH v1] ARM: vfp: Use long jump to fix THUMB2 kernel compilation error Dmitry Osipenko
2020-10-21 23:40 ` Kees Cook
2020-10-22 0:00 ` Dmitry Osipenko
2020-10-22 3:28 ` Kees Cook
2020-10-22 7:06 ` Ard Biesheuvel
2020-10-22 15:57 ` Dmitry Osipenko
2020-10-22 16:06 ` Ard Biesheuvel
2020-10-22 16:11 ` Russell King - ARM Linux admin
2020-10-22 16:20 ` Ard Biesheuvel
2020-10-22 16:23 ` Russell King - ARM Linux admin
2020-10-22 16:33 ` Ard Biesheuvel
2020-10-22 17:48 ` Russell King - ARM Linux admin
2020-10-22 17:59 ` Ard Biesheuvel
2020-10-26 8:58 ` Ard Biesheuvel
2020-10-29 9:56 ` Ard Biesheuvel
2020-11-03 7:24 ` Ard Biesheuvel
2020-11-03 8:43 ` Dmitry Osipenko
2020-11-09 7:25 ` Ard Biesheuvel
2020-11-10 7:44 ` Dmitry Osipenko
2020-11-10 7:45 ` Ard Biesheuvel
2020-10-22 16:34 ` Dmitry Osipenko
2020-10-22 17:38 ` Russell King - ARM Linux admin
2020-10-22 17:47 ` Ard Biesheuvel
2020-10-22 17:50 ` Russell King - ARM Linux admin
2020-10-22 17:51 ` Ard Biesheuvel
2020-10-22 19:05 ` Dmitry Osipenko
2020-10-22 14:57 ` Russell King - ARM Linux admin [this message]
2020-10-22 15:56 ` Dmitry Osipenko
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