Commit 5f9b5e65 authored Aug 18, 2017 by Ard Biesheuvel Committed by Greg Hackmann Oct 16, 2017

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



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)

Change-Id: Ie46c542b5d20ca0d21532152eda7007994fd6af7

parent 19445a07

drivers/firmware/efi/libstub/arm64-stub.c

+9 −1

Original line number	Diff line number	Diff line
		@@ -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 <asm/sysreg.h>

		#include "efistub.h"