evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

BACKPORT: efi/libstub/arm64: Force 'hidden' visibility for section markers

Browse source 
To prevent the compiler from emitting absolute references to the section
markers when running in PIC mode, override the visibility to 'hidden' for
all contents of asm/sections.h

Tested-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20170818194947.19347-4-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 0426a4e68f18d75515414361de9e3e1445d2644e)
Signed-off-by: Greg Hackmann <ghackmann@google.com>

Change-Id: Ia438c3f0aa6abdbd9057dfe1db732a25aa98ef40
This commit is contained in:
Ard Biesheuvel 2017-08-18 20:49:36 +01:00 • committed by Greg Hackmann
parent 75eb3438b2
commit 00b6078ea6
1 changed files with 9 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/firmware/efi/libstub/arm64-stub.c
View file

@ -9,9 +9,17 @@
* published by the Free Software Foundation.
*
*/
/*
* To prevent the compiler from emitting GOT-indirected (and thus absolute)
* references to the section markers, override their visibility as 'hidden'
*/
#pragma GCC visibility push(hidden)
#include <asm/sections.h>
#pragma GCC visibility pop
#include <linux/efi.h>
#include <asm/efi.h>
#include <asm/sections.h>
#include "efistub.h"