From patchwork Thu Jun 23 01:48:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Zhongjin X-Patchwork-Id: 12891736 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5F90CC43334 for ; Thu, 23 Jun 2022 03:01:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=88pW13kXJ0f3+WGBsieQ/fw7oqKBuJBaznNGYIrv2JI=; b=XeAsxK1aGimayQ NgumYFlCGDmgfHOMTOC1rbRoif9FWddZzxojUAs5wu9uwTL8wbfif20FHLmXxzyp6F4hnHjaWSoMt aqXw++eXv0dCn6Qwk3nhF4wFMC4SaVYblWco5d85NcgI3ydGNlkP0dZyZupvgYBRAVG7gruzBeBc4 jmSqeKmr0LjMugZKWEBVHYyHotmZWPt5n11evZwgZvedGRPX0I16nJFb+1crKArg/po4ruIZCyVbS vJugeKs/oJYbeGwMQSDlohnUMCb8UtOWEM0R5GOgehPno1D2fYzZR2sm9UZ3LBukZiIeM8qrSK0kr 99VYOrbj0lS8seW1T+pQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4D58-00D7fx-7X; Thu, 23 Jun 2022 03:00:34 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4C0c-00Ck1u-AR for linux-arm-kernel@lists.infradead.org; Thu, 23 Jun 2022 01:51:52 +0000 Received: from dggpemm500020.china.huawei.com (unknown [172.30.72.54]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4LT39j36XkzkWb1; Thu, 23 Jun 2022 09:50:33 +0800 (CST) Received: from dggpemm500013.china.huawei.com (7.185.36.172) by dggpemm500020.china.huawei.com (7.185.36.49) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 23 Jun 2022 09:51:46 +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 15.1.2375.24; Thu, 23 Jun 2022 09:51:46 +0800 From: Chen Zhongjin To: , , , , , CC: , , , , , , , , , , , , , , Subject: [PATCH v6 04/33] objtool: arm64: Decode jump and call related instructions Date: Thu, 23 Jun 2022 09:48:48 +0800 Message-ID: <20220623014917.199563-5-chenzhongjin@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220623014917.199563-1-chenzhongjin@huawei.com> References: <20220623014917.199563-1-chenzhongjin@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.175.36] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggpemm500013.china.huawei.com (7.185.36.172) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220622_185150_560352_DCEC9E39 X-CRM114-Status: UNSURE ( 8.25 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 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; }