diff options
| author |   Kees Cook <keescook@chromium.org> | 2019-10-29 14:13:36 -0700 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2019-11-04 15:59:01 +0100 |
| commit | b8c2f776164c8f74ac31c5e370ca3f029be0aa19 (patch) | |
| tree | 51e0c86e0f90cf5a46a518a3836edb2ab372e999 /include/asm-generic/vmlinux.lds.h | |
| parent | vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATA (diff) | |
| download | linux-dev-b8c2f776164c8f74ac31c5e370ca3f029be0aa19.tar.xz linux-dev-b8c2f776164c8f74ac31c5e370ca3f029be0aa19.zip | |
vmlinux.lds.h: Allow EXCEPTION_TABLE to live in RO_DATA
Many architectures have an EXCEPTION_TABLE that needs to be only
readable. As such, it should live in RO_DATA. Create a macro to identify
this case for the architectures that can move EXCEPTION_TABLE into
RO_DATA.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Will Deacon <will@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: linux-alpha@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-ia64@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-s390@vger.kernel.org
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Rick Edgecombe <rick.p.edgecombe@intel.com>
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Cc: x86-ml <x86@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: https://lkml.kernel.org/r/20191029211351.13243-15-keescook@chromium.org
Diffstat (limited to 'include/asm-generic/vmlinux.lds.h')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 356078e50a5c..9867d8e41eed 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -69,6 +69,17 @@ #define NOTES_HEADERS_RESTORE #endif +/* + * Some architectures have non-executable read-only exception tables. + * They can be added to the RO_DATA segment by specifying their desired + * alignment. + */ +#ifdef RO_EXCEPTION_TABLE_ALIGN +#define RO_EXCEPTION_TABLE EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN) +#else +#define RO_EXCEPTION_TABLE +#endif + /* Align . to a 8 byte boundary equals to maximum function alignment. */ #define ALIGN_FUNCTION() . = ALIGN(8) @@ -513,6 +524,7 @@ __stop___modver = .; \ } \ \ + RO_EXCEPTION_TABLE \ NOTES \ \ . = ALIGN((align)); \ |