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Subject[tip: x86/build] powerpc: Move EXCEPTION_TABLE to RO_DATA segment
The following commit has been merged into the x86/build branch of tip:

Commit-ID: 4e9e559a0385930649c1c9cad703d475ee030206
Gitweb: https://git.kernel.org/tip/4e9e559a0385930649c1c9cad703d475ee030206
Author: Kees Cook <keescook@chromium.org>
AuthorDate: Tue, 29 Oct 2019 14:13:46 -07:00
Committer: Borislav Petkov <bp@suse.de>
CommitterDate: Mon, 04 Nov 2019 18:30:13 +01:00

powerpc: Move EXCEPTION_TABLE to RO_DATA segment

Since the EXCEPTION_TABLE is read-only, collapse it into RO_DATA.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
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: linux-s390@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.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: Will Deacon <will@kernel.org>
Cc: x86-ml <x86@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: https://lkml.kernel.org/r/20191029211351.13243-25-keescook@chromium.org
---
arch/powerpc/kernel/vmlinux.lds.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 4e7cec0..8834220 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -7,6 +7,7 @@

#define BSS_FIRST_SECTIONS *(.bss.prominit)
#define EMITS_PT_NOTE
+#define RO_EXCEPTION_TABLE_ALIGN 0

#include <asm/page.h>
#include <asm-generic/vmlinux.lds.h>
@@ -162,7 +163,6 @@ SECTIONS
__stop__btb_flush_fixup = .;
}
#endif
- EXCEPTION_TABLE(0)

/*
* Init sections discarded at runtime
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