Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755934AbYK0KkS (ORCPT ); Thu, 27 Nov 2008 05:40:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753039AbYK0Kcz (ORCPT ); Thu, 27 Nov 2008 05:32:55 -0500 Received: from mtagate7.de.ibm.com ([195.212.29.156]:62876 "EHLO mtagate7.de.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752752AbYK0KcX (ORCPT ); Thu, 27 Nov 2008 05:32:23 -0500 Message-Id: <20081127103133.957555357@de.ibm.com> References: <20081127103020.528516828@de.ibm.com> User-Agent: quilt/0.46-1 Date: Thu, 27 Nov 2008 11:30:42 +0100 From: Martin Schwidefsky To: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Cc: Heiko Carstens , Martin Schwidefsky Subject: [patch 22/60] ftrace: function tracer backend for s390 Content-Disposition: inline; filename=121-func-tracer.diff Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4012 Lines: 158 From: Heiko Carstens This implements just the basic function tracer (_mcount) backend for s390. The dynamic variant will come later. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/Kconfig | 1 arch/s390/include/asm/ftrace.h | 8 +++++ arch/s390/kernel/Makefile | 6 ++++ arch/s390/kernel/mcount.S | 56 +++++++++++++++++++++++++++++++++++++++++ arch/s390/kernel/s390_ksyms.c | 5 +++ 5 files changed, 76 insertions(+) Index: quilt-2.6/arch/s390/include/asm/ftrace.h =================================================================== --- /dev/null +++ quilt-2.6/arch/s390/include/asm/ftrace.h @@ -0,0 +1,8 @@ +#ifndef _ASM_S390_FTRACE_H +#define _ASM_S390_FTRACE_H + +#ifndef __ASSEMBLY__ +extern void _mcount(void); +#endif + +#endif /* _ASM_S390_FTRACE_H */ Index: quilt-2.6/arch/s390/Kconfig =================================================================== --- quilt-2.6.orig/arch/s390/Kconfig +++ quilt-2.6/arch/s390/Kconfig @@ -74,6 +74,7 @@ mainmenu "Linux Kernel Configuration" config S390 def_bool y select USE_GENERIC_SMP_HELPERS if SMP + select HAVE_FUNCTION_TRACER select HAVE_OPROFILE select HAVE_KPROBES select HAVE_KRETPROBES Index: quilt-2.6/arch/s390/kernel/Makefile =================================================================== --- quilt-2.6.orig/arch/s390/kernel/Makefile +++ quilt-2.6/arch/s390/kernel/Makefile @@ -2,6 +2,11 @@ # Makefile for the linux kernel. # +ifdef CONFIG_FUNCTION_TRACER +# Do not trace early boot code +CFLAGS_REMOVE_early.o = -pg +endif + # # Passing null pointers is ok for smp code, since we access the lowcore here. # @@ -34,6 +39,7 @@ obj-$(CONFIG_COMPAT) += compat_linux.o obj-$(CONFIG_VIRT_TIMER) += vtime.o obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-$(CONFIG_KPROBES) += kprobes.o +obj-$(CONFIG_FUNCTION_TRACER) += mcount.o # Kexec part S390_KEXEC_OBJS := machine_kexec.o crash.o Index: quilt-2.6/arch/s390/kernel/mcount.S =================================================================== --- /dev/null +++ quilt-2.6/arch/s390/kernel/mcount.S @@ -0,0 +1,56 @@ +/* + * Copyright IBM Corp. 2008 + * + * Author(s): Heiko Carstens , + * + */ + +#ifndef CONFIG_64BIT +.globl _mcount +_mcount: + stm %r0,%r5,8(%r15) + st %r14,56(%r15) + lr %r1,%r15 + ahi %r15,-96 + l %r3,100(%r15) + la %r2,0(%r14) + st %r1,0(%r15) + la %r3,0(%r3) + bras %r14,0f + .long ftrace_trace_function +0: l %r14,0(%r14) + l %r14,0(%r14) + basr %r14,%r14 + ahi %r15,96 + lm %r0,%r5,8(%r15) + l %r14,56(%r15) + br %r14 + +.globl ftrace_stub +ftrace_stub: + br %r14 + +#else /* CONFIG_64BIT */ + +.globl _mcount +_mcount: + stmg %r0,%r5,16(%r15) + stg %r14,112(%r15) + lgr %r1,%r15 + aghi %r15,-160 + stg %r1,0(%r15) + lgr %r2,%r14 + lg %r3,168(%r15) + larl %r14,ftrace_trace_function + lg %r14,0(%r14) + basr %r14,%r14 + aghi %r15,160 + lmg %r0,%r5,16(%r15) + lg %r14,112(%r15) + br %r14 + +.globl ftrace_stub +ftrace_stub: + br %r14 + +#endif /* CONFIG_64BIT */ Index: quilt-2.6/arch/s390/kernel/s390_ksyms.c =================================================================== --- quilt-2.6.orig/arch/s390/kernel/s390_ksyms.c +++ quilt-2.6/arch/s390/kernel/s390_ksyms.c @@ -14,6 +14,7 @@ #include #include #include +#include #ifdef CONFIG_IP_MULTICAST #include #endif @@ -43,3 +44,7 @@ EXPORT_SYMBOL(csum_fold); EXPORT_SYMBOL(console_mode); EXPORT_SYMBOL(console_devno); EXPORT_SYMBOL(console_irq); + +#ifdef CONFIG_FUNCTION_TRACER +EXPORT_SYMBOL(_mcount); +#endif -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/