| Message ID | 20170518090953.32628-3-ard.biesheuvel@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | efi: arm64: use -fpie for building the stub | expand |
El Thu, May 18, 2017 at 10:09:52AM +0100 Ard Biesheuvel ha dit: > 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 > > Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Matthias Kaehlcke <mka@chromium.org> -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c index b4c2589d7c91..f7a6970e9abc 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"
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 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> --- drivers/firmware/efi/libstub/arm64-stub.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html