diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-08-18 20:49:36 +0100 |
|---|---|---|
| committer | Greg Hackmann <ghackmann@google.com> | 2017-10-09 14:00:13 -0700 |
| commit | 00b6078ea64bfbbc539a8924a328053cc6d16114 (patch) | |
| tree | 82852cdbcdbf38c3f560a6ee0b5f7340fdee1e00 /drivers/firmware/efi/libstub/arm64-stub.c | |
| parent | 75eb3438b28512e33877354349d01f2dd659f0e6 (diff) | |
BACKPORT: 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)
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Change-Id: Ia438c3f0aa6abdbd9057dfe1db732a25aa98ef40
Diffstat (limited to 'drivers/firmware/efi/libstub/arm64-stub.c')
| -rw-r--r-- | drivers/firmware/efi/libstub/arm64-stub.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c index e0e6b74fef8f..1b78215d6cd2 100644 --- a/drivers/firmware/efi/libstub/arm64-stub.c +++ b/drivers/firmware/efi/libstub/arm64-stub.c @@ -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" |