From patchwork Thu Jun 23 01:49:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Zhongjin X-Patchwork-Id: 12891697 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 7C926C433EF for ; Thu, 23 Jun 2022 02:14:25 +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=4JqIxE01t2+/suVtRGLIRJyag8CRxz/JfrdkP6Ez8G0=; b=YrVT42cHW1kzZ6 iF6H7oIth/7D0Lshhr96QDR1OdWbKDfUFhYR5LiJDpFUGqvOlYM/DoC4B308qchm/ybIRFvSg/Fhv NtrvVLyeNUlo0lGc7aiQAdX/wI//BEN9OECeyiqxZUgMF46QUoi6rO1Cop49+zyJLKKyZwL/G8g6O sHu6Wws4QkTjoCM3p2UpMiKRqrdch7i/xhpOx0gjSHh0Mgo1PJ8GBmjlpBvdHfv7t0dMsn1gGN7G0 YwXcOT9WYHTORjnsRQOfjkjbN+AFxc+RYV2KfWOnskn1aIhdj1T70CR2thaYWyRHQ1HvjTo+zs0N9 Ta5NJs3I1AndOhcVhr6Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4CLO-00CtkZ-PK; Thu, 23 Jun 2022 02:13:19 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4C3T-00ClXE-Aw for linux-arm-kernel@bombadil.infradead.org; Thu, 23 Jun 2022 01:54:47 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:CC:To:From:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=B1s9l6JJPSMLOXot8VbRJ3rWeChjMXsh/J942IuJgJE=; b=OgI+NT8CB8ub4j5T3B5a2FhBJl WbxYtSu6Z8hqfKKNqAtfzhEHupSujNzGUiJigNf/1fIbUNZml3L/8EPCGVZom8LA9EV8QIYho8FPN v5zbZ1HDJdHoY+WScWI6JUQcwx5gHvsFnkaaVccYgMdKL1FewfRRF4Rp+JLJy4eKnaejoIP3/prLZ Bbt5uZTwhvPUKtF9igNWyqd8Td/eTGo1eaA16X7Tn0PIFRohJksSv1UC13Vpurn39zBasZu+Dhaa3 lVf91Uko/MGBve0gCg9Mr3vKAIBxK99qdUVuwumP2Bf1M7zveo5qGT+qA6UnAJhnpU1qQ+aSzHusk Gb9OqoyQ==; Received: from szxga01-in.huawei.com ([45.249.212.187]) by desiato.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4C0g-00BTYV-Tp for linux-arm-kernel@lists.infradead.org; Thu, 23 Jun 2022 01:52:51 +0000 Received: from dggpemm500024.china.huawei.com (unknown [172.30.72.57]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4LT38j0dc9zhYgX; Thu, 23 Jun 2022 09:49:41 +0800 (CST) Received: from dggpemm500013.china.huawei.com (7.185.36.172) by dggpemm500024.china.huawei.com (7.185.36.203) 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 09:51:49 +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 09:51:49 +0800 From: Chen Zhongjin To: , , , , , CC: , , , , , , , , , , , , , , Subject: [PATCH v6 17/33] objtool: arm64: Add unwind_hint support Date: Thu, 23 Jun 2022 09:49:01 +0800 Message-ID: <20220623014917.199563-18-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-20220623_025246_329078_0DA59A7D X-CRM114-Status: GOOD ( 13.79 ) 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 Provide unwind hint defines for arm64 and objtool hint decoding. Signed-off-by: Julien Thierry Signed-off-by: Chen Zhongjin --- arch/arm64/include/asm/unwind_hints.h | 26 +++++++++++++++++++++ tools/arch/arm64/include/asm/unwind_hints.h | 26 +++++++++++++++++++++ tools/objtool/arch/arm64/decode.c | 14 ++++++++++- 3 files changed, 65 insertions(+), 1 deletion(-) create mode 100644 arch/arm64/include/asm/unwind_hints.h create mode 100644 tools/arch/arm64/include/asm/unwind_hints.h diff --git a/arch/arm64/include/asm/unwind_hints.h b/arch/arm64/include/asm/unwind_hints.h new file mode 100644 index 000000000000..ffee9472b30d --- /dev/null +++ b/arch/arm64/include/asm/unwind_hints.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ASM_UNWIND_HINTS_H +#define __ASM_UNWIND_HINTS_H + +#include + +#include "orc_types.h" + +#ifdef __ASSEMBLY__ + +.macro UNWIND_HINT_EMPTY + UNWIND_HINT sp_reg=ORC_REG_UNDEFINED type=UNWIND_HINT_TYPE_CALL end=1 +.endm + +.macro UNWIND_HINT_FUNC sp_offset=0 + UNWIND_HINT sp_reg=ORC_REG_SP sp_offset=\sp_offset type=UNWIND_HINT_TYPE_CALL +.endm + +.macro UNWIND_HINT_REGS base=ORC_REG_SP offset=0 + UNWIND_HINT sp_reg=\base sp_offset=\offset type=UNWIND_HINT_TYPE_REGS +.endm + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_UNWIND_HINTS_H */ diff --git a/tools/arch/arm64/include/asm/unwind_hints.h b/tools/arch/arm64/include/asm/unwind_hints.h new file mode 100644 index 000000000000..ffee9472b30d --- /dev/null +++ b/tools/arch/arm64/include/asm/unwind_hints.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ASM_UNWIND_HINTS_H +#define __ASM_UNWIND_HINTS_H + +#include + +#include "orc_types.h" + +#ifdef __ASSEMBLY__ + +.macro UNWIND_HINT_EMPTY + UNWIND_HINT sp_reg=ORC_REG_UNDEFINED type=UNWIND_HINT_TYPE_CALL end=1 +.endm + +.macro UNWIND_HINT_FUNC sp_offset=0 + UNWIND_HINT sp_reg=ORC_REG_SP sp_offset=\sp_offset type=UNWIND_HINT_TYPE_CALL +.endm + +.macro UNWIND_HINT_REGS base=ORC_REG_SP offset=0 + UNWIND_HINT sp_reg=\base sp_offset=\offset type=UNWIND_HINT_TYPE_REGS +.endm + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_UNWIND_HINTS_H */ diff --git a/tools/objtool/arch/arm64/decode.c b/tools/objtool/arch/arm64/decode.c index 771d37d872c8..21a7f8315465 100644 --- a/tools/objtool/arch/arm64/decode.c +++ b/tools/objtool/arch/arm64/decode.c @@ -5,6 +5,7 @@ #include #include +#include #include #include @@ -176,7 +177,18 @@ static int is_arm64(const struct elf *elf) int arch_decode_hint_reg(u8 sp_reg, int *base) { - return -1; + switch (sp_reg) { + case ORC_REG_UNDEFINED: + *base = CFI_UNDEFINED; + break; + case ORC_REG_SP: + *base = CFI_SP; + break; + default: + return -1; + } + + return 0; } static inline void make_add_op(enum aarch64_insn_register dest,