From patchwork Mon Jul 22 21:39:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Grall X-Patchwork-Id: 169440 Delivered-To: patch@linaro.org Received: by 2002:a92:4782:0:0:0:0:0 with SMTP id e2csp8012396ilk; Mon, 22 Jul 2019 14:41:25 -0700 (PDT) X-Google-Smtp-Source: APXvYqwHRqhW2pWG54bj3SuXbuZO3rQfLwcSmdsqVpUb1/A5rHzVeKnEj2yhY8sswvfJNpx/J2lv X-Received: by 2002:a5e:a712:: with SMTP id b18mr66042865iod.220.1563831685247; Mon, 22 Jul 2019 14:41:25 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1563831685; cv=none; d=google.com; s=arc-20160816; b=DR3q5bgMx1lDhFM6+1jGOR4f16KBoDZqFgCPTMdtTOBFB54gnM2ue4MTZKtlzOSw6Y /8YG5ACvLNfuzLyTLSmWEmEQzff5AFut0dpy6ODWeVbFB4HVgUssgDjhdprRWCKx6n0y lzz9kH6rzHV80px3jSAfQ/my8e+rRNT5Wql4tfQYm21Ul/KpN/gWgoEPRAx1ywqMNCzb BGkUiRb761UE0NiC7guhp91A0pOsMS6MPN2etCxyjWs6rGxNM2Hc6AQFL8Cfn3/jm4db GbGyOf69gkCrnsvOWhE1vuFNuXyH/J7btu60G0S5xyx/SNmaPdAIHj61Nkj11NSTrzCm V2KA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:content-transfer-encoding:mime-version:cc :list-subscribe:list-help:list-post:list-unsubscribe:list-id :precedence:subject:references:in-reply-to:message-id:date:to:from; bh=TYv3f8tMVHJdr6F8EK2AuYGzfLhhgMD8Z+QfpFCT8HM=; b=pWBrx/qPyv5RrEnsXntRgbEl4z7IORZ2YM4ttWndHYSgNlMqTk9tMQyXvf08X0SdgT 2nsuKxIKQKFfQFyEqzJkMlIAoiRv3q4/XIj3bzIexRh/9xcQOaxES4tFa6ckvE8A0349 pxrHcCmUPtJMmg9dtQBnG7KmLvBYQSJ6xtkV9+a97IksWKXbkBLh1VKRwW2b+xMlAnYL Kqn9eK7O/KINPC5HTHcjaLjHWm/rU95/BVZLbHYSjUp5nKBBVyxYezTbGAD60FEIQRoO HtzwLaQrPT6S39rlqsiG3m0Tc/aneMJfMGsws356+ahfJZo2Pjko/mSzf8CUdHGJksA3 f/Ww== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of xen-devel-bounces@lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Return-Path: Received: from lists.xenproject.org (lists.xenproject.org. [192.237.175.120]) by mx.google.com with ESMTPS id g10si43122714jag.105.2019.07.22.14.41.25 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 22 Jul 2019 14:41:25 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of xen-devel-bounces@lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of xen-devel-bounces@lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hpg2T-0002Q3-ED; Mon, 22 Jul 2019 21:40:09 +0000 Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hpg2R-0002MX-V8 for xen-devel@lists.xenproject.org; Mon, 22 Jul 2019 21:40:07 +0000 X-Inumbo-ID: 45b43da2-acc9-11e9-8980-bc764e045a96 Received: from foss.arm.com (unknown [217.140.110.172]) by us1-rack-dfw2.inumbo.com (Halon) with ESMTP id 45b43da2-acc9-11e9-8980-bc764e045a96; Mon, 22 Jul 2019 21:40:06 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9C54D1509; Mon, 22 Jul 2019 14:40:06 -0700 (PDT) Received: from e108454-lin.cambridge.arm.com (e108454-lin.cambridge.arm.com [10.1.196.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E87433F71F; Mon, 22 Jul 2019 14:40:05 -0700 (PDT) From: Julien Grall To: xen-devel@lists.xenproject.org Date: Mon, 22 Jul 2019 22:39:24 +0100 Message-Id: <20190722213958.5761-2-julien.grall@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190722213958.5761-1-julien.grall@arm.com> References: <20190722213958.5761-1-julien.grall@arm.com> Subject: [Xen-devel] [PATCH v2 01/35] xen/arm64: macros: Introduce an assembly macro to alias x30 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Julien Grall , Stefano Stabellini , Volodymyr Babchuk MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" The return address of a function is always stored in x30. For convenience, introduce a register alias so "lr" can be used in assembly. This is defined in asm-arm/arm64/macros.h to allow all assembly files to use it. Signed-off-by: Julien Grall Reviewed-by: Volodymyr Babchuk Reviewed-by: Stefano Stabellini --- Changes in v2: - Patch added --- xen/arch/arm/arm64/entry.S | 5 ----- xen/include/asm-arm/arm64/macros.h | 5 +++++ 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/xen/arch/arm/arm64/entry.S b/xen/arch/arm/arm64/entry.S index 97b05f53ea..2d9a2713a1 100644 --- a/xen/arch/arm/arm64/entry.S +++ b/xen/arch/arm/arm64/entry.S @@ -7,11 +7,6 @@ #include /* - * Register aliases. - */ -lr .req x30 /* link register */ - -/* * Stack pushing/popping (register pairs only). Equivalent to store decrement * before, load increment after. */ diff --git a/xen/include/asm-arm/arm64/macros.h b/xen/include/asm-arm/arm64/macros.h index 9c5e676b37..f981b4f43e 100644 --- a/xen/include/asm-arm/arm64/macros.h +++ b/xen/include/asm-arm/arm64/macros.h @@ -21,5 +21,10 @@ ldr \dst, [\dst, \tmp] .endm +/* + * Register aliases. + */ +lr .req x30 /* link register */ + #endif /* __ASM_ARM_ARM64_MACROS_H */