diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-08-18 20:49:36 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-27 16:07:58 +0100 |
| commit | c2d14540ebbd0522b8226348909d13065544af94 (patch) | |
| tree | bff7e4574d09a3d8eed1d265ec40bacbc9437366 /drivers | |
| parent | c042dd600f4e89b6e7bdffa00aea4d1d3c1e9686 (diff) | |
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>
[nc: Fix conflict due to lack of commit 42b55734030c1 in linux-4.4.y]
Signed-off-by: Nathan Chancellor <natechancellor@gmail.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 78dfbd34b6bf..044efb779ed1 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> efi_status_t __init handle_kernel_image(efi_system_table_t *sys_table_arg, unsigned long *image_addr, |