From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH] pure-ftpd: disable PIE on ARC
Date: Thu, 9 Jul 2015 22:04:58 +0200 [thread overview]
Message-ID: <20150709220458.643ac31c@free-electrons.com> (raw)
In-Reply-To: <1436434731-2388-1-git-send-email-abrodkin@synopsys.com>
Dear Alexey Brodkin,
On Thu, 9 Jul 2015 12:38:51 +0300, Alexey Brodkin wrote:
> Even though ARC gcc understands "-pie" option and attempts to generate
> PIE binaries as of today PIE is not really supported for user-space
> applications.
>
> So we disable PIE detection if building for ARC.
> That first fixes http://autobuild.buildroot.net/results/57a/57a6180809bc51f7206280533f0b9898ce4cfbb4
> and also prevents execution of non-supported PIE binary in runtime.
>
> Interesting enough reported build failure is not directly related to PIE
> it looks like if PIE is enabled then successful detection of explicit_bzero()
> happens erroneously.
>
> A simple test app that mentions explicit_bzero() while built with
> "-pie" gives this output:
> --------------------------------->8-----------------------------
> arc-linux-gcc test.c -pie
> /home/abrodkin/Tools/arc/gnu/2015.06-rc1-uclibc-archs/bin/../lib/gcc/arc-snps-linux-uclibc/4.8.4/../../../../arc-snps-linux-uclibc/bin/ld: /home/abrodkin/Tools/arc/gnu/2015.06-rc1-uclibc-archs/bin/../arc-snps-linux-uclibc/sysroot/usr/lib/crt1.o: warning: unresolvable relocation against symbol `__uClibc_main' from .text section
> /home/abrodkin/Tools/arc/gnu/2015.06-rc1-uclibc-archs/bin/../lib/gcc/arc-snps-linux-uclibc/4.8.4/../../../../arc-snps-linux-uclibc/bin/ld: /home/abrodkin/Tools/arc/gnu/2015.06-rc1-uclibc-archs/bin/../lib/gcc/arc-snps-linux-uclibc/4.8.4/crtbegin.o: warning: unresolvable relocation against symbol `__deregister_frame_info@@GCC_3.0' from .text section
> /home/abrodkin/Tools/arc/gnu/2015.06-rc1-uclibc-archs/bin/../lib/gcc/arc-snps-linux-uclibc/4.8.4/../../../../arc-snps-linux-uclibc/bin/ld: /home/abrodkin/Tools/arc/gnu/2015.06-rc1-uclibc-archs/bin/../lib/gcc/arc-snps-linux-uclibc/4.8.4/crtbegin.o: warning: unresolvable relocation against symbol `__deregister_frame_info@@GCC_3.0' from .text section
> /home/abrodkin/Tools/arc/gnu/2015.06-rc1-uclibc-archs/bin/../lib/gcc/arc-snps-linux-uclibc/4.8.4/../../../../arc-snps-linux-uclibc/bin/ld: /home/abrodkin/Tools/arc/gnu/2015.06-rc1-uclibc-archs/bin/../lib/gcc/arc-snps-linux-uclibc/4.8.4/crtbegin.o: warning: unresolvable relocation against symbol `__register_frame_info@@GCC_3.0' from .text section
> --------------------------------->8-----------------------------
Applied, thanks.
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
prev parent reply other threads:[~2015-07-09 20:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-09 9:38 [Buildroot] [PATCH] pure-ftpd: disable PIE on ARC Alexey Brodkin
2015-07-09 20:04 ` Thomas Petazzoni [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150709220458.643ac31c@free-electrons.com \
--to=thomas.petazzoni@free-electrons.com \
--cc=buildroot@busybox.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox