From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932192AbeBGUcj (ORCPT ); Wed, 7 Feb 2018 15:32:39 -0500 Received: from mail.kernel.org ([198.145.29.99]:35614 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754422AbeBGU2S (ORCPT ); Wed, 7 Feb 2018 15:28:18 -0500 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1C419217AA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=rostedt@goodmis.org Message-Id: <20180207202815.165691124@goodmis.org> User-Agent: quilt/0.63-1 Date: Wed, 07 Feb 2018 15:24:06 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Linus Torvalds , Ingo Molnar , Andrew Morton , Thomas Gleixner , Peter Zijlstra , Masami Hiramatsu , Tom Zanussi , linux-rt-users@vger.kernel.org, linux-trace-users@vger.kernel.org, Arnaldo Carvalho de Melo , Clark Williams , Jiri Olsa , Daniel Bristot de Oliveira , Juri Lelli Subject: [PATCH 04/20 v2] tracing/x86: Add arch_get_func_args() function References: <20180207202402.253089656@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Disposition: inline; filename=0004-tracing-x86-Add-arch_get_func_args-function.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Steven Rostedt (VMware)" Add function to get the function arguments from pt_regs. Signed-off-by: Steven Rostedt (VMware) --- arch/x86/kernel/ftrace.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index 01ebcb6f263e..5e845c8cf89d 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -46,6 +46,34 @@ int ftrace_arch_code_modify_post_process(void) return 0; } +int arch_get_func_args(struct pt_regs *regs, + int start, int end, long *args) +{ +#ifdef CONFIG_X86_64 +# define MAX_ARGS 6 +# define INIT_REGS \ + { regs->di, regs->si, regs->dx, \ + regs->cx, regs->r8, regs->r9 \ + } +#else +# define MAX_ARGS 3 +# define INIT_REGS \ + { regs->ax, regs->dx, regs->cx } +#endif + if (!regs) + return MAX_ARGS; + + { + long pt_args[] = INIT_REGS; + int i; + + for (i = start; i <= end && i < MAX_ARGS; i++) + args[i - start] = pt_args[i]; + + return i - start; + } +} + union ftrace_code_union { char code[MCOUNT_INSN_SIZE]; struct { -- 2.15.1