From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4667DC4708E for ; Wed, 4 Jan 2023 16:14:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235285AbjADQOM (ORCPT ); Wed, 4 Jan 2023 11:14:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235044AbjADQNy (ORCPT ); Wed, 4 Jan 2023 11:13:54 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D0A726F4 for ; Wed, 4 Jan 2023 08:13:53 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id E0B87B81730 for ; Wed, 4 Jan 2023 16:13:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B3F0C433EF; Wed, 4 Jan 2023 16:13:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672848830; bh=9MkbbxsK9aL9abwNpbWHTyHy3Sm/cMBJ8YxmLMLB6Ng=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b6k5WSJzSkE6LVQHtBn7D3WXxk64KDglrPVYbrukvRb9EchXYZraiDA/Xml8n09yT emXzSnRx8f4gcw/qAJ3u36v1FYn/VGtQ9nj+ZC83n8icWpLUBgYZ66JG/DPc5y7dhi kiVLhoy/bf0m9WO46hlSAc2D9zRrk6zQLLBZANYY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Michael Jeanson , Mathieu Desnoyers , Michael Ellerman Subject: [PATCH 6.1 091/207] powerpc/ftrace: fix syscall tracing on PPC64_ELF_ABI_V1 Date: Wed, 4 Jan 2023 17:05:49 +0100 Message-Id: <20230104160514.817893156@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230104160511.905925875@linuxfoundation.org> References: <20230104160511.905925875@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Michael Jeanson commit ad050d2390fccb22aa3e6f65e11757ce7a5a7ca5 upstream. In v5.7 the powerpc syscall entry/exit logic was rewritten in C, on PPC64_ELF_ABI_V1 this resulted in the symbols in the syscall table changing from their dot prefixed variant to the non-prefixed ones. Since ftrace prefixes a dot to the syscall names when matching them to build its syscall event list, this resulted in no syscall events being available. Remove the PPC64_ELF_ABI_V1 specific version of arch_syscall_match_sym_name to have the same behavior across all powerpc variants. Fixes: 68b34588e202 ("powerpc/64/sycall: Implement syscall entry/exit logic in C") Cc: stable@vger.kernel.org # v5.7+ Signed-off-by: Michael Jeanson Reviewed-by: Mathieu Desnoyers Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20221201161442.2127231-1-mjeanson@efficios.com Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/include/asm/ftrace.h | 12 ------------ 1 file changed, 12 deletions(-) --- a/arch/powerpc/include/asm/ftrace.h +++ b/arch/powerpc/include/asm/ftrace.h @@ -64,17 +64,6 @@ void ftrace_graph_func(unsigned long ip, * those. */ #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME -#ifdef CONFIG_PPC64_ELF_ABI_V1 -static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) -{ - /* We need to skip past the initial dot, and the __se_sys alias */ - return !strcmp(sym + 1, name) || - (!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name)) || - (!strncmp(sym, ".ppc_", 5) && !strcmp(sym + 5, name + 4)) || - (!strncmp(sym, ".ppc32_", 7) && !strcmp(sym + 7, name + 4)) || - (!strncmp(sym, ".ppc64_", 7) && !strcmp(sym + 7, name + 4)); -} -#else static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) { return !strcmp(sym, name) || @@ -83,7 +72,6 @@ static inline bool arch_syscall_match_sy (!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) || (!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4)); } -#endif /* CONFIG_PPC64_ELF_ABI_V1 */ #endif /* CONFIG_FTRACE_SYSCALLS */ #if defined(CONFIG_PPC64) && defined(CONFIG_FUNCTION_TRACER)