From: Chen Zhongjin <chenzhongjin@huawei.com>
To: <linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>
Cc: <jthierry@redhat.com>, <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>
Subject: [RFC PATCH v3 06/13] objtool: arm64: Decode jump and call related instructions
Date: Thu, 7 Apr 2022 20:01:34 +0800 [thread overview]
Message-ID: <20220407120141.43801-7-chenzhongjin@huawei.com> (raw)
In-Reply-To: <20220407120141.43801-1-chenzhongjin@huawei.com>
From: Julien Thierry <jthierry@redhat.com>
Decode branch, branch and link (aarch64's call) and return instructions.
Signed-off-by: Julien Thierry <jthierry@redhat.com>
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
---
tools/objtool/arch/arm64/decode.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/tools/objtool/arch/arm64/decode.c b/tools/objtool/arch/arm64/decode.c
index 84daec62006a..351f8b1bbd6d 100644
--- a/tools/objtool/arch/arm64/decode.c
+++ b/tools/objtool/arch/arm64/decode.c
@@ -219,6 +219,27 @@ int arch_decode_instruction(struct objtool_file *file, const struct section *sec
}
}
break;
+ case AARCH64_INSN_CLS_BR_SYS:
+ if (aarch64_insn_is_ret(insn) &&
+ aarch64_insn_decode_register(AARCH64_INSN_REGTYPE_RN, insn)
+ == AARCH64_INSN_REG_LR) {
+ *type = INSN_RETURN;
+ } else if (aarch64_insn_is_bl(insn)) {
+ *type = INSN_CALL;
+ *immediate = aarch64_get_branch_offset(insn);
+ } else if (aarch64_insn_is_blr(insn)) {
+ *type = INSN_CALL_DYNAMIC;
+ } else if (aarch64_insn_is_b(insn)) {
+ *type = INSN_JUMP_UNCONDITIONAL;
+ *immediate = aarch64_get_branch_offset(insn);
+ } else if (aarch64_insn_is_br(insn)) {
+ *type = INSN_JUMP_DYNAMIC;
+ } else if (aarch64_insn_is_branch_imm(insn)) {
+ /* Remaining branch opcodes are conditional */
+ *type = INSN_JUMP_CONDITIONAL;
+ *immediate = aarch64_get_branch_offset(insn);
+ }
+ break;
default:
break;
}
--
2.17.1
next prev parent reply other threads:[~2022-04-07 12:03 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-07 12:01 [RFC PATCH v3 00/13] objtool: add base support for arm64 Chen Zhongjin
2022-04-07 12:01 ` [RFC PATCH v3 01/13] tools: Add some generic functions and headers Chen Zhongjin
2022-04-07 12:01 ` [RFC PATCH v3 02/13] tools: arm64: Make aarch64 instruction decoder available to tools Chen Zhongjin
2022-04-07 12:01 ` [RFC PATCH v3 03/13] tools: bug: Remove duplicate definition Chen Zhongjin
2022-04-07 12:01 ` [RFC PATCH v3 04/13] objtool: arm64: Add base definition for arm64 backend Chen Zhongjin
2022-04-07 12:01 ` [RFC PATCH v3 05/13] objtool: arm64: Decode add/sub instructions Chen Zhongjin
2022-04-07 12:01 ` Chen Zhongjin [this message]
2022-04-07 12:01 ` [RFC PATCH v3 07/13] objtool: arm64: Decode other system instructions Chen Zhongjin
2022-04-07 12:01 ` [RFC PATCH v3 08/13] objtool: arm64: Decode load/store instructions Chen Zhongjin
2022-04-07 12:01 ` [RFC PATCH v3 09/13] objtool: arm64: Decode LDR instructions Chen Zhongjin
2022-04-07 12:01 ` [RFC PATCH v3 10/13] objtool: arm64: Accept non-instruction data in code sections Chen Zhongjin
2022-04-07 12:01 ` [RFC PATCH v3 11/13] objtool: arm64: Handle supported relocations in alternatives Chen Zhongjin
2022-04-07 12:01 ` [RFC PATCH v3 12/13] objtool: arm64: Ignore replacement section for alternative callback Chen Zhongjin
2022-04-07 12:01 ` [RFC PATCH v3 13/13] objtool: arm64: Enable stack validation for arm64 Chen Zhongjin
2022-04-07 12:19 ` Peter Zijlstra
2022-04-08 9:25 ` Chen Zhongjin
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