From: Chen Zhongjin <chenzhongjin@huawei.com>
To: <linux-kernel@vger.kernel.org>, <linux-arch@vger.kernel.org>,
<linuxppc-dev@lists.ozlabs.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kbuild@vger.kernel.org>, <live-patching@vger.kernel.org>
Cc: mark.rutland@arm.com, madvenka@linux.microsoft.com,
michal.lkml@markovi.net, pasha.tatashin@soleen.com,
peterz@infradead.org, catalin.marinas@arm.com,
masahiroy@kernel.org, ndesaulniers@google.com,
chenzhongjin@huawei.com, rmk+kernel@armlinux.org.uk,
broonie@kernel.org, will@kernel.org, jpoimboe@kernel.org
Subject: [PATCH v5 04/33] objtool: arm64: Decode jump and call related instructions
Date: Wed, 22 Jun 2022 23:48:51 +0800 [thread overview]
Message-ID: <20220622154920.95075-5-chenzhongjin@huawei.com> (raw)
In-Reply-To: <20220622154920.95075-1-chenzhongjin@huawei.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 d8c32703874d..40ada17d0842 100644
--- a/tools/objtool/arch/arm64/decode.c
+++ b/tools/objtool/arch/arm64/decode.c
@@ -212,6 +212,27 @@ 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:[~2022-06-22 15:53 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-22 15:48 [PATCH v5 00/33] objtool: add base support for arm64 Chen Zhongjin
2022-06-22 15:48 ` [PATCH v5 01/33] tools: arm64: Make aarch64 instruction decoder available to tools Chen Zhongjin
2022-06-22 15:48 ` [PATCH v5 02/33] objtool: arm64: Add base definition for arm64 backend Chen Zhongjin
2022-06-22 15:48 ` [PATCH v5 03/33] objtool: arm64: Decode add/sub instructions Chen Zhongjin
2022-06-22 15:48 ` Chen Zhongjin [this message]
2022-06-22 15:48 ` [PATCH v5 05/33] objtool: arm64: Decode other system instructions Chen Zhongjin
2022-06-22 15:48 ` [PATCH v5 06/33] objtool: arm64: Decode load/store instructions Chen Zhongjin
2022-06-22 15:48 ` [PATCH v5 07/33] objtool: arm64: Decode LDR instructions Chen Zhongjin
2022-06-22 15:48 ` [PATCH v5 08/33] objtool: arm64: Accept non-instruction data in code sections Chen Zhongjin
2022-06-22 15:48 ` [PATCH v5 09/33] objtool: check: Support data in text section Chen Zhongjin
2022-06-22 15:48 ` [PATCH v5 10/33] objtool: arm64: Handle supported relocations in alternatives Chen Zhongjin
2022-06-22 15:48 ` [PATCH v5 11/33] objtool: arm64: Ignore replacement section for alternative callback Chen Zhongjin
2022-06-22 15:48 ` [PATCH v5 12/33] objtool: arm64: Enable stack validation for arm64 Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 13/33] objtool: arm64: Enable ORC " Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 14/33] objtool: arm64: Add annotate_reachable() for objtools Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 15/33] arm64: bug: Add reachable annotation to warning macros Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 16/33] arm64: kgdb: Add reachable annotation after kgdb brk Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 17/33] objtool: arm64: Add unwind_hint support Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 18/33] arm64: Change symbol type annotations Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 19/33] arm64: Annotate unwind_hint for symbols with empty stack Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 20/33] arm64: entry: Annotate unwind_hint for entry Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 21/33] arm64: kvm: Annotate unwind_hint for hyp entry Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 22/33] arm64: efi-header: Mark efi header as data Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 23/33] arm64: head: Mark constants " Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 24/33] arm64: proc: Mark constant " Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 25/33] arm64: crypto: " Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 26/33] arm64: crypto: Remove unnecessary stackframe Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 27/33] arm64: Set intra-function call annotations Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 28/33] arm64: sleep: Properly set frame pointer before call Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 29/33] arm64: compat: Move VDSO code to .rodata section Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 30/33] arm64: entry: Align stack size for alternative Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 31/33] arm64: kernel: Skip validation of proton-pack.c Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 32/33] arm64: irq-gic: Replace unreachable() with -EINVAL Chen Zhongjin
2022-06-22 15:49 ` [PATCH v5 33/33] objtool: revert c_file fallthrough detection for arm64 Chen Zhongjin
2022-06-22 17:19 ` [PATCH v5 00/33] objtool: add base support " Daniel Thompson
2022-06-23 1:37 ` Chen Zhongjin
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