Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754147AbcKNNEC (ORCPT ); Mon, 14 Nov 2016 08:04:02 -0500 Received: from bastet.se.axis.com ([195.60.68.11]:48515 "EHLO bastet.se.axis.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752307AbcKNNEB (ORCPT ); Mon, 14 Nov 2016 08:04:01 -0500 From: Rabin Vincent To: linux@armlinux.org.uk Cc: rostedt@goodmis.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Rabin Vincent Subject: [PATCH] ARM: ftrace: fix syscall name matching Date: Mon, 14 Nov 2016 14:03:45 +0100 Message-Id: <1479128625-20948-1-git-send-email-rabin.vincent@axis.com> X-Mailer: git-send-email 2.1.4 X-TM-AS-GCONF: 00 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1386 Lines: 48 From: Rabin Vincent ARM has a few system calls (most notably mmap) for which the names of the functions which are referenced in the syscall table do not match the names of the syscall tracepoints. As a consequence of this, these tracepoints are not made available. Implement arch_syscall_match_sym_name to fix this and allow tracing even these system calls. Signed-off-by: Rabin Vincent --- arch/arm/include/asm/ftrace.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h index bfe2a2f..8467909 100644 --- a/arch/arm/include/asm/ftrace.h +++ b/arch/arm/include/asm/ftrace.h @@ -54,6 +54,27 @@ static inline void *return_address(unsigned int level) #define ftrace_return_address(n) return_address(n) +#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME + +static inline bool arch_syscall_match_sym_name(const char *sym, + const char *name) +{ + /* Skip sys_ */ + sym += 4; + name += 4; + + if (!strcmp(sym, "mmap2")) + sym = "mmap_pgoff"; + else if (!strcmp(sym, "statfs64_wrapper")) + sym = "statfs64"; + else if (!strcmp(sym, "fstatfs64_wrapper")) + sym = "fstatfs64"; + else if (!strcmp(sym, "arm_fadvise64_64")) + sym = "fadvise64_64"; + + return !strcmp(sym, name); +} + #endif /* ifndef __ASSEMBLY__ */ #endif /* _ASM_ARM_FTRACE */ -- 2.1.4