Commit 0426a4e6 authored Aug 18, 2017 by Ard Biesheuvel Committed by Ingo Molnar Aug 21, 2017

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>

parent 760b61d7

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"