Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp2815715imu; Thu, 29 Nov 2018 10:39:50 -0800 (PST) X-Google-Smtp-Source: AFSGD/UrURIcwTEmARstsaKYnRUSVI3cUk8brRl8fUnjev55prPsZkHW22eIyf7JV7HC/loe/iOo X-Received: by 2002:a17:902:2c03:: with SMTP id m3mr2451668plb.6.1543516790787; Thu, 29 Nov 2018 10:39:50 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1543516790; cv=none; d=google.com; s=arc-20160816; b=tCmuEreuei+/qse2IkCrnuRjXKtrHVlwE0IU87TqwA36EX4VQjQwfuVYQIaeOqxLS0 R+HqwfGSud30akyaqQzZ2n+02hhM1rWdXixZnti9FJyV+BEUAXTCOQvF3lGGXzHHuDCc OdK4mBhSgH8t40J4/+IFzYqUgdrxwT9sThq7puMXLEVBY5pZcYB7x/kzjVOGtlHfhBjX 0TMTsga9F+sV/8JSbvn4MCZeOH4l7BOvRQi2DuRvNPZdQ0VwFVLMU31I0e7MKo95GY2k /kb9ZSzew9DQGKfPAVhIDEVwIQr2w5evAgM2ZDRm9rO61ptnRMoAZGcQJ3ixzh1chir3 nmmA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date; bh=nHpGpUgpiPgt6Q4jxHKoRrh5zMnKojRuigYQRFAa6xs=; b=zfPRPYTYkz9SP7A/ZFpRJnHvmJRCaOu8f3yI3/yJWhbPRE1Towz7sDyDq1YwvnMM5V qo3lQXIrEcuni3zvXfKiU6mfkbJY3nB3qFXTGllVDvJUvM//hYCnSrFBuHXQ13NT2NuA pRwrQ3UMW4XMPy8lWo69iiUQwEF7QgOSnwSslaaQjg0qGmzE1AQ5dY74Iue0Zxsoqcss 5oyZbdIa8JyIsuSpPzhbBgaA4GfoI6pP4Gwv5D3AmrOlDOi8qcMpC99ZuQggOLGtEf/a osCXH/NGxFMZpnyxg1skAYUAhyWI21OsiQ3vgArlu5e8usJEsQZA5KgtKkdUIKEFp/6C Mwwg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id u22si2365283pgh.286.2018.11.29.10.39.35; Thu, 29 Nov 2018 10:39:50 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729464AbeK3E2G (ORCPT + 99 others); Thu, 29 Nov 2018 23:28:06 -0500 Received: from mail.kernel.org ([198.145.29.99]:38884 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726736AbeK3E2G (ORCPT ); Thu, 29 Nov 2018 23:28:06 -0500 Received: from gandalf.local.home (cpe-66-24-56-78.stny.res.rr.com [66.24.56.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 55DC420863; Thu, 29 Nov 2018 17:21:58 +0000 (UTC) Date: Thu, 29 Nov 2018 12:21:56 -0500 From: Steven Rostedt To: Peter Zijlstra Cc: Andy Lutomirski , Josh Poimboeuf , Andy Lutomirski , X86 ML , LKML , Ard Biesheuvel , Ingo Molnar , Thomas Gleixner , Linus Torvalds , Masami Hiramatsu , Jason Baron , Jiri Kosina , David Laight , Borislav Petkov , julia@ni.com, jeyu@kernel.org, "H. Peter Anvin" Subject: Re: [PATCH v2 4/4] x86/static_call: Add inline static call implementation for x86-64 Message-ID: <20181129122156.782e739e@gandalf.local.home> In-Reply-To: <20181129122000.7fb4fb04@gandalf.local.home> References: <20181126200801.GW2113@hirez.programming.kicks-ass.net> <20181126212628.4apztfazichxnt7r@treble> <20181127084330.GX2113@hirez.programming.kicks-ass.net> <20181129094210.GC2131@hirez.programming.kicks-ass.net> <20181129143853.GO2131@hirez.programming.kicks-ass.net> <20181129163342.tp5wlfcyiazwwyoh@treble> <20181129164914.GA9027@hirez.programming.kicks-ass.net> <0FDA053D-7ADC-4F42-AEA5-99DA155FCED0@amacapital.net> <20181129171539.GD9027@hirez.programming.kicks-ass.net> <20181129122000.7fb4fb04@gandalf.local.home> X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 29 Nov 2018 12:20:00 -0500 Steven Rostedt wrote: > r8 = return address > r9 = function to call > Bad example, r8 and r9 are args, but r10 and r11 are available. -- Steve > push r8 > jmp *r9 > > Then have the regs->ip point to that trampoline. > > -- Steve