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From: Thomas Petazzoni via buildroot <buildroot@buildroot.org>
To: Ben Wolsieffer <ben.wolsieffer@hefring.com>
Cc: "Yann E. MORIN" <yann.morin.1998@free.fr>, buildroot@buildroot.org
Subject: Re: [Buildroot] [PATCH v2 2/4] arch/arm: add support for FDPIC
Date: Wed, 3 Aug 2022 00:13:06 +0200	[thread overview]
Message-ID: <20220803001306.01608551@windsurf> (raw)
In-Reply-To: <20220802202142.1770838-3-Ben.Wolsieffer@hefring.com>

On Tue,  2 Aug 2022 16:21:40 -0400
Ben Wolsieffer <ben.wolsieffer@hefring.com> wrote:

> Linux on ARM supports FDPIC binaries intended for use on no-MMU systems.
> This patch enables support for building a toolchain that produces FDPIC
> binaries.
> 
> The target name for an FDPIC toolchain must be
> arm-<vendor>-uclinuxfdpiceabi, which doesn't follow the standard format
> and requires a special case.
> 
> According to the kernel help for CONFIG_BINFMT_ELF_FDPIC, "It is also
> possible to run FDPIC ELF binaries on MMU linux," so FDPIC support is
> available on all ARM platforms, not just no-MMU.
> 
> Signed-off-by: Ben Wolsieffer <Ben.Wolsieffer@hefring.com>

I am (genuinely) surprised it's all what's needed. All of
binutils/gcc/gdb automagically now that we're using FDPIC just by
looking at the uclinuxfdpiceabi part of the tuple?

Thanks!

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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  reply	other threads:[~2022-08-02 22:13 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-02 20:21 [Buildroot] [PATCH v2 0/4] Add support for FDPIC binaries on ARM Ben Wolsieffer
2022-08-02 20:21 ` [Buildroot] [PATCH v2 1/4] Revert "arch: drop now useless support for FDPIC" Ben Wolsieffer
2022-08-02 22:12   ` Thomas Petazzoni via buildroot
2022-08-03 21:04     ` Ben Wolsieffer
2022-08-02 20:21 ` [Buildroot] [PATCH v2 2/4] arch/arm: add support for FDPIC Ben Wolsieffer
2022-08-02 22:13   ` Thomas Petazzoni via buildroot [this message]
2022-08-03 20:54     ` Ben Wolsieffer
2022-08-02 20:21 ` [Buildroot] [PATCH v2 3/4] boot/uboot: pass -mno-fdpic if FDPIC is enabled Ben Wolsieffer
2022-08-02 22:15   ` Thomas Petazzoni via buildroot
2022-08-03 21:07     ` Ben Wolsieffer
2022-08-02 20:21 ` [Buildroot] [PATCH v2 4/4] linux: " Ben Wolsieffer
2022-08-02 22:08 ` [Buildroot] [PATCH v2 0/4] Add support for FDPIC binaries on ARM Thomas Petazzoni via buildroot
2022-08-03 20:52   ` Ben Wolsieffer

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