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From: Julien Thierry <jthierry@redhat.com>
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com,
	ardb@kernel.org, masahiroy@kernel.org, jpoimboe@redhat.com,
	peterz@infradead.org, ycote@redhat.com,
	Julien Thierry <jthierry@redhat.com>
Subject: [RFC PATCH v2 11/13] objtool: arm64: Handle supported relocations in alternatives
Date: Wed,  3 Mar 2021 18:09:30 +0100	[thread overview]
Message-ID: <20210303170932.1838634-12-jthierry@redhat.com> (raw)
In-Reply-To: <20210303170932.1838634-1-jthierry@redhat.com>

Based on get_alt_insn() in arch/arm64/kernel/alternative.c, arm64
alternative code adapts offsets for static branches and adrp
instructions.

Signed-off-by: Julien Thierry <jthierry@redhat.com>
---
 tools/objtool/arch/arm64/special.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/objtool/arch/arm64/special.c b/tools/objtool/arch/arm64/special.c
index 45f283283091..a70b91e8bd7d 100644
--- a/tools/objtool/arch/arm64/special.c
+++ b/tools/objtool/arch/arm64/special.c
@@ -10,7 +10,11 @@ bool arch_support_alt_relocation(struct special_alt *special_alt,
 				 struct instruction *insn,
 				 struct reloc *reloc)
 {
-	return false;
+	u32 opcode = *(u32 *)(insn->sec->data->d_buf + insn->offset);
+
+	return aarch64_insn_is_branch_imm(opcode) ||
+	       aarch64_insn_is_adrp(opcode) ||
+	       !aarch64_insn_uses_literal(opcode);
 }
 
 
-- 
2.25.4


WARNING: multiple messages have this Message-ID (diff)
From: Julien Thierry <jthierry@redhat.com>
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com,
	ardb@kernel.org, masahiroy@kernel.org, jpoimboe@redhat.com,
	peterz@infradead.org, ycote@redhat.com,
	Julien Thierry <jthierry@redhat.com>
Subject: [RFC PATCH v2 11/13] objtool: arm64: Handle supported relocations in alternatives
Date: Wed,  3 Mar 2021 18:09:30 +0100	[thread overview]
Message-ID: <20210303170932.1838634-12-jthierry@redhat.com> (raw)
In-Reply-To: <20210303170932.1838634-1-jthierry@redhat.com>

Based on get_alt_insn() in arch/arm64/kernel/alternative.c, arm64
alternative code adapts offsets for static branches and adrp
instructions.

Signed-off-by: Julien Thierry <jthierry@redhat.com>
---
 tools/objtool/arch/arm64/special.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/objtool/arch/arm64/special.c b/tools/objtool/arch/arm64/special.c
index 45f283283091..a70b91e8bd7d 100644
--- a/tools/objtool/arch/arm64/special.c
+++ b/tools/objtool/arch/arm64/special.c
@@ -10,7 +10,11 @@ bool arch_support_alt_relocation(struct special_alt *special_alt,
 				 struct instruction *insn,
 				 struct reloc *reloc)
 {
-	return false;
+	u32 opcode = *(u32 *)(insn->sec->data->d_buf + insn->offset);
+
+	return aarch64_insn_is_branch_imm(opcode) ||
+	       aarch64_insn_is_adrp(opcode) ||
+	       !aarch64_insn_uses_literal(opcode);
 }
 
 
-- 
2.25.4


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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2021-03-03 19:29 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-03 17:09 [RFC PATCH v2 00/13] objtool: add base support for arm64 Julien Thierry
2021-03-03 17:09 ` Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 01/13] tools: Add some generic functions and headers Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 02/13] tools: arm64: Make aarch64 instruction decoder available to tools Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 03/13] tools: bug: Remove duplicate definition Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 04/13] objtool: arm64: Add base definition for arm64 backend Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 05/13] objtool: arm64: Decode add/sub instructions Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 06/13] objtool: arm64: Decode jump and call related instructions Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 07/13] objtool: arm64: Decode other system instructions Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 08/13] objtool: arm64: Decode load/store instructions Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 09/13] objtool: arm64: Decode LDR instructions Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 10/13] objtool: arm64: Accept padding in code sections Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-03 17:09 ` Julien Thierry [this message]
2021-03-03 17:09   ` [RFC PATCH v2 11/13] objtool: arm64: Handle supported relocations in alternatives Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 12/13] objtool: arm64: Ignore replacement section for alternative callback Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-03 17:09 ` [RFC PATCH v2 13/13] objtool: arm64: Enable stack validation for arm64 Julien Thierry
2021-03-03 17:09   ` Julien Thierry
2021-03-07 10:25   ` Ard Biesheuvel
2021-03-07 10:25     ` Ard Biesheuvel
2021-03-09 14:31     ` Julien Thierry
2021-03-09 14:31       ` Julien Thierry
2021-03-03 19:17 ` [RFC PATCH v2 00/13] objtool: add base support " Peter Zijlstra
2021-03-03 19:17   ` Peter Zijlstra
2021-03-04 14:03   ` Julien Thierry
2021-03-04 14:03     ` Julien Thierry
2021-03-05 23:51 ` Nick Desaulniers
2021-03-05 23:51   ` Nick Desaulniers
2021-03-06  0:04   ` Nick Desaulniers
2021-03-06  0:04     ` Nick Desaulniers
2021-03-09 14:27     ` Julien Thierry
2021-03-09 14:27       ` Julien Thierry

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