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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-08-18 20:49:36 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-23 08:20:36 +0100 |
| commit | 94c47d4190575403145cca7ef2080c8087ee7ca6 (patch) | |
| tree | 4b168deb7870f4315762417db3d2f209afe95ce5 /drivers | |
| parent | 61d920c3b21c9b3facacfc49aa73f6dc3fcf234c (diff) | |
| download | linux-94c47d4190575403145cca7ef2080c8087ee7ca6.tar.gz linux-94c47d4190575403145cca7ef2080c8087ee7ca6.tar.bz2 linux-94c47d4190575403145cca7ef2080c8087ee7ca6.zip | |
efi/libstub/arm64: Force 'hidden' visibility for section markers
commit 0426a4e68f18d75515414361de9e3e1445d2644e upstream.
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>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -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 eae693eb3e91..959d9b8d4845 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 <asm/sysreg.h> #include "efistub.h" |