[v3,24/29] powerpc: Move EXCEPTION_TABLE to RO_DATA segment

Message ID	20191029211351.13243-25-keescook@chromium.org (mailing list archive)
State	Not Applicable
Headers	show Return-Path: <linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org> From: Kees Cook <keescook@chromium.org> To: Borislav Petkov <bp@alien8.de> Subject: [PATCH v3 24/29] powerpc: Move EXCEPTION_TABLE to RO_DATA segment Date: Tue, 29 Oct 2019 14:13:46 -0700 Message-Id: <20191029211351.13243-25-keescook@chromium.org> In-Reply-To: <20191029211351.13243-1-keescook@chromium.org> References: <20191029211351.13243-1-keescook@chromium.org> Precedence: list Cc: linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Michal Simek <monstr@monstr.eu>, linux-ia64@vger.kernel.org, Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>, Dave Hansen <dave.hansen@linux.intel.com>, linuxppc-dev@lists.ozlabs.org, Heiko Carstens <heiko.carstens@de.ibm.com>, Yoshinori Sato <ysato@users.sourceforge.jp>, Andy Lutomirski <luto@kernel.org>, linux-alpha@vger.kernel.org, Rick Edgecombe <rick.p.edgecombe@intel.com>, Will Deacon <will@kernel.org>, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" <linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>
Series	vmlinux.lds.h: Refactor EXCEPTION_TABLE and NOTES \| expand [v3,00/29] vmlinux.lds.h: Refactor EXCEPTION_TABLE and NOTES [v3,01/29] powerpc: Rename "notes" PT_NOTE to "note" [v3,02/29] powerpc: Remove PT_NOTE workaround [v3,03/29] powerpc: Rename PT_LOAD identifier "kernel" to "text" [v3,04/29] alpha: Rename PT_LOAD identifier "kernel" to "text" [v3,05/29] ia64: Rename PT_LOAD identifier "code" to "text" [v3,06/29] s390: Move RO_DATA into "text" PT_LOAD Program Header [v3,07/29] x86: Restore "text" Program Header with dummy section [v3,08/29] vmlinux.lds.h: Provide EMIT_PT_NOTE to indicate export of .notes [v3,09/29] vmlinux.lds.h: Move Program Header restoration into NOTES macro [v3,10/29] vmlinux.lds.h: Move NOTES into RO_DATA [v3,11/29] vmlinux.lds.h: Replace RODATA with RO_DATA [v3,12/29] vmlinux.lds.h: Replace RO_DATA_SECTION with RO_DATA [v3,13/29] vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATA [v3,14/29] vmlinux.lds.h: Allow EXCEPTION_TABLE to live in RO_DATA [v3,15/29] x86: Actually use _etext for end of text segment [v3,16/29] x86: Move EXCEPTION_TABLE to RO_DATA segment [v3,17/29] alpha: Move EXCEPTION_TABLE to RO_DATA segment [v3,18/29] arm64: Move EXCEPTION_TABLE to RO_DATA segment [v3,19/29] c6x: Move EXCEPTION_TABLE to RO_DATA segment [v3,20/29] h8300: Move EXCEPTION_TABLE to RO_DATA segment [v3,21/29] ia64: Move EXCEPTION_TABLE to RO_DATA segment [v3,22/29] microblaze: Move EXCEPTION_TABLE to RO_DATA segment [v3,23/29] parisc: Move EXCEPTION_TABLE to RO_DATA segment [v3,24/29] powerpc: Move EXCEPTION_TABLE to RO_DATA segment [v3,25/29] xtensa: Move EXCEPTION_TABLE to RO_DATA segment [v3,26/29] x86/mm: Remove redundant &s on addresses [v3,27/29] x86/mm: Report which part of kernel image is freed [v3,28/29] x86/mm: Report actual image regions in /proc/iomem [v3,29/29] x86: Use INT3 instead of NOP for linker fill bytes

Message ID

20191029211351.13243-25-keescook@chromium.org (mailing list archive)

State

Not Applicable

Headers

From: Kees Cook <keescook@chromium.org>
To: Borislav Petkov <bp@alien8.de>
Subject: [PATCH v3 24/29] powerpc: Move EXCEPTION_TABLE to RO_DATA segment
Date: Tue, 29 Oct 2019 14:13:46 -0700
Message-Id: <20191029211351.13243-25-keescook@chromium.org>
In-Reply-To: <20191029211351.13243-1-keescook@chromium.org>
References: <20191029211351.13243-1-keescook@chromium.org>
Precedence: list
Cc: linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
	Michal Simek <monstr@monstr.eu>, linux-ia64@vger.kernel.org,
	Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	linuxppc-dev@lists.ozlabs.org, 
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	Andy Lutomirski <luto@kernel.org>, linux-alpha@vger.kernel.org,
	Rick Edgecombe <rick.p.edgecombe@intel.com>, 
	Will Deacon <will@kernel.org>, linux-arm-kernel@lists.infradead.org, 
	linux-c6x-dev@linux-c6x.org
Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org
Sender: "Linuxppc-dev"
	<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>

Series

vmlinux.lds.h: Refactor EXCEPTION_TABLE and NOTES | expand

Checks

Context	Check	Description
snowpatch_ozlabs/apply_patch	success	Successfully applied on branch powerpc/merge (ac35ea27aebf23d7bc698231a18e7606bd7a24b2)
snowpatch_ozlabs/checkpatch	success	total: 0 errors, 0 warnings, 0 checks, 14 lines checked

Context

Check

Description

snowpatch_ozlabs/apply_patch

success

Successfully applied on branch powerpc/merge (ac35ea27aebf23d7bc698231a18e7606bd7a24b2)

snowpatch_ozlabs/checkpatch

success

total: 0 errors, 0 warnings, 0 checks, 14 lines checked

Commit Message

Kees Cook Oct. 29, 2019, 9:13 p.m. UTC

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

Signed-off-by: Kees Cook <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 4e7cec088c8b..8834220036a5 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

[v3,24/29] powerpc: Move EXCEPTION_TABLE to RO_DATA segment

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Patch