From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8A3EC433EF for ; Thu, 7 Apr 2022 12:03:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245066AbiDGMF1 (ORCPT ); Thu, 7 Apr 2022 08:05:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54176 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245041AbiDGMEl (ORCPT ); Thu, 7 Apr 2022 08:04:41 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 51210C4E16 for ; Thu, 7 Apr 2022 05:02:37 -0700 (PDT) Received: from dggpemm500022.china.huawei.com (unknown [172.30.72.54]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4KZ0Ns3WdCz1HBdW; Thu, 7 Apr 2022 20:02:05 +0800 (CST) Received: from dggpemm500013.china.huawei.com (7.185.36.172) by dggpemm500022.china.huawei.com (7.185.36.162) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Thu, 7 Apr 2022 20:02:33 +0800 Received: from ubuntu1804.huawei.com (10.67.175.36) by dggpemm500013.china.huawei.com (7.185.36.172) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Thu, 7 Apr 2022 20:02:33 +0800 From: Chen Zhongjin To: , CC: , , , , , , , , Subject: [RFC PATCH v3 06/13] objtool: arm64: Decode jump and call related instructions Date: Thu, 7 Apr 2022 20:01:34 +0800 Message-ID: <20220407120141.43801-7-chenzhongjin@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220407120141.43801-1-chenzhongjin@huawei.com> References: <20220407120141.43801-1-chenzhongjin@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.175.36] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpemm500013.china.huawei.com (7.185.36.172) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Julien Thierry Decode branch, branch and link (aarch64's call) and return instructions. Signed-off-by: Julien Thierry Signed-off-by: Chen Zhongjin --- 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