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From: Raphael Gault <raphael.gault@arm.com>
To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: julien.thierry@arm.com, peterz@infradead.org,
	catalin.marinas@arm.com, will.deacon@arm.com,
	Raphael Gault <raphael.gault@arm.com>,
	jpoimboe@redhat.com
Subject: [RFC V3 11/18] arm64: alternative: Mark .altinstr_replacement as containing executable instructions
Date: Mon, 24 Jun 2019 10:55:41 +0100	[thread overview]
Message-ID: <20190624095548.8578-12-raphael.gault@arm.com> (raw)
In-Reply-To: <20190624095548.8578-1-raphael.gault@arm.com>

Until now, the section .altinstr_replacement wasn't marked as containing
executable instructions on arm64. This patch changes that so that it is
coherent with what is done on x86.

Signed-off-by: Raphael Gault <raphael.gault@arm.com>
---
 arch/arm64/include/asm/alternative.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/alternative.h b/arch/arm64/include/asm/alternative.h
index b9f8d787eea9..e9e6b81e3eb4 100644
--- a/arch/arm64/include/asm/alternative.h
+++ b/arch/arm64/include/asm/alternative.h
@@ -71,7 +71,7 @@ static inline void apply_alternatives_module(void *start, size_t length) { }
 	ALTINSTR_ENTRY(feature,cb)					\
 	".popsection\n"							\
 	" .if " __stringify(cb) " == 0\n"				\
-	".pushsection .altinstr_replacement, \"a\"\n"			\
+	".pushsection .altinstr_replacement, \"ax\"\n"			\
 	"663:\n\t"							\
 	newinstr "\n"							\
 	"664:\n\t"							\
-- 
2.17.1


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  parent reply	other threads:[~2019-06-24  9:59 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-24  9:55 [RFC V3 00/18] objtool: Add support for arm64 Raphael Gault
2019-06-24  9:55 ` [RFC V3 01/18] objtool: Add abstraction for computation of symbols offsets Raphael Gault
2019-06-24  9:55 ` [RFC V3 02/18] objtool: orc: Refactor ORC API for other architectures to implement Raphael Gault
2019-06-24  9:55 ` [RFC V3 03/18] objtool: Move registers and control flow to arch-dependent code Raphael Gault
2019-06-24  9:55 ` [RFC V3 04/18] objtool: arm64: Add required implementation for supporting the aarch64 architecture in objtool Raphael Gault
2019-06-24  9:55 ` [RFC V3 05/18] objtool: special: Adapt special section handling Raphael Gault
2019-06-24  9:55 ` [RFC V3 06/18] objtool: arm64: Adapt the stack frame checks for arm architecture Raphael Gault
2019-06-24  9:55 ` [RFC V3 07/18] objtool: Introduce INSN_UNKNOWN type Raphael Gault
2019-06-24  9:55 ` [RFC V3 08/18] objtool: Refactor switch-tables code to support other architectures Raphael Gault
2019-06-24  9:55 ` [RFC V3 09/18] gcc-plugins: objtool: Add plugin to detect switch table on arm64 Raphael Gault
2019-06-24  9:55 ` [RFC V3 10/18] objtool: arm64: Implement functions to add switch tables alternatives Raphael Gault
2019-06-24  9:55 ` Raphael Gault [this message]
2019-07-01 14:51   ` [RFC V3 11/18] arm64: alternative: Mark .altinstr_replacement as containing executable instructions Catalin Marinas
2019-06-24  9:55 ` [RFC V3 12/18] arm64: assembler: Add macro to annotate asm function having non standard stack-frame Raphael Gault
2019-07-01 14:40   ` Catalin Marinas
2019-07-02  9:49     ` Raphael Gault
2019-06-24  9:55 ` [RFC V3 13/18] arm64: sleep: Prevent stack frame warnings from objtool Raphael Gault
2019-06-24  9:55 ` [RFC V3 14/18] arm64: kvm: Annotate non-standard stack frame functions Raphael Gault
2019-06-24  9:55 ` [RFC V3 15/18] arm64: kernel: Add exception on kuser32 to prevent stack analysis Raphael Gault
2019-06-24  9:55 ` [RFC V3 16/18] arm64: crypto: Add exceptions for crypto object " Raphael Gault
2019-06-24  9:55 ` [RFC V3 17/18] arm64: kernel: Annotate non-standard stack frame functions Raphael Gault
2019-06-24  9:55 ` [RFC V3 18/18] objtool: arm64: Enable stack validation for arm64 Raphael Gault
2019-07-10  7:31 ` [RFC V3 00/18] objtool: Add support " Raphael Gault
2019-07-10 14:33   ` Josh Poimboeuf

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