From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752481AbaBGKUN (ORCPT ); Fri, 7 Feb 2014 05:20:13 -0500 Received: from mail-pd0-f179.google.com ([209.85.192.179]:39281 "EHLO mail-pd0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751872AbaBGKUI (ORCPT ); Fri, 7 Feb 2014 05:20:08 -0500 From: AKASHI Takahiro To: rostedt@goodmis.org, fweisbec@gmail.com, mingo@redhat.com, catalin.marinas@arm.com, will.deacon@arm.com, gkulkarni@caviumnetworks.com, tim.bird@sonymobile.com Cc: arndb@arndb.de, linux-arm-kernel@lists.infradead.org, linaro-kernel@lists.linaro.org, linux-kernel@vger.kernel.org, patches@linaro.org, AKASHI Takahiro Subject: [PATCH v3 5/6] arm64: ftrace: Add system call tracepoint Date: Fri, 7 Feb 2014 19:18:55 +0900 Message-Id: <1391768336-5642-6-git-send-email-takahiro.akashi@linaro.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1391768336-5642-1-git-send-email-takahiro.akashi@linaro.org> References: <1382598488-13511-1-git-send-email-takahiro.akashi@linaro.org> <1391768336-5642-1-git-send-email-takahiro.akashi@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch allows system call entry or exit to be traced as ftrace events, ie. sys_enter_*/sys_exit_*, if CONFIG_FTRACE_SYSCALLS is enabled. Those events appear and can be controlled under ${sysfs}/tracing/events/syscalls/ Signed-off-by: AKASHI Takahiro --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/syscall.h | 1 + arch/arm64/include/asm/unistd.h | 2 ++ arch/arm64/kernel/ptrace.c | 5 +++++ 4 files changed, 9 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 43fce76..9bdaf5c 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -42,6 +42,7 @@ config ARM64 select HAVE_HW_BREAKPOINT if PERF_EVENTS select HAVE_MEMBLOCK select HAVE_PERF_EVENTS + select HAVE_SYSCALL_TRACEPOINTS select IRQ_DOMAIN select MODULES_USE_ELF_RELA select NO_BOOTMEM diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h index 70ba9d4..383771e 100644 --- a/arch/arm64/include/asm/syscall.h +++ b/arch/arm64/include/asm/syscall.h @@ -18,6 +18,7 @@ #include +extern const void *sys_call_table[]; static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h index 82ce217..c335479 100644 --- a/arch/arm64/include/asm/unistd.h +++ b/arch/arm64/include/asm/unistd.h @@ -28,3 +28,5 @@ #endif #define __ARCH_WANT_SYS_CLONE #include + +#define NR_syscalls (__NR_syscalls) diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 64ce39f..f4c3c4e 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -41,6 +41,9 @@ #include #include +#define CREATE_TRACE_POINTS +#include + /* * TODO: does not yet catch signals sent when the child dies. * in exit.c or in signal.c. @@ -1076,10 +1079,12 @@ asmlinkage int syscall_trace(int dir, struct pt_regs *regs) } if (dir) { + trace_sys_exit(regs, regs->syscallno); tracehook_report_syscall_exit(regs, 0); } else { if (tracehook_report_syscall_entry(regs)) regs->syscallno = ~0UL; + trace_sys_enter(regs, regs->syscallno); } if (is_compat_task()) -- 1.7.9.5 From mboxrd@z Thu Jan 1 00:00:00 1970 From: takahiro.akashi@linaro.org (AKASHI Takahiro) Date: Fri, 7 Feb 2014 19:18:55 +0900 Subject: [PATCH v3 5/6] arm64: ftrace: Add system call tracepoint In-Reply-To: <1391768336-5642-1-git-send-email-takahiro.akashi@linaro.org> References: <1382598488-13511-1-git-send-email-takahiro.akashi@linaro.org> <1391768336-5642-1-git-send-email-takahiro.akashi@linaro.org> Message-ID: <1391768336-5642-6-git-send-email-takahiro.akashi@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This patch allows system call entry or exit to be traced as ftrace events, ie. sys_enter_*/sys_exit_*, if CONFIG_FTRACE_SYSCALLS is enabled. Those events appear and can be controlled under ${sysfs}/tracing/events/syscalls/ Signed-off-by: AKASHI Takahiro --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/syscall.h | 1 + arch/arm64/include/asm/unistd.h | 2 ++ arch/arm64/kernel/ptrace.c | 5 +++++ 4 files changed, 9 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 43fce76..9bdaf5c 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -42,6 +42,7 @@ config ARM64 select HAVE_HW_BREAKPOINT if PERF_EVENTS select HAVE_MEMBLOCK select HAVE_PERF_EVENTS + select HAVE_SYSCALL_TRACEPOINTS select IRQ_DOMAIN select MODULES_USE_ELF_RELA select NO_BOOTMEM diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h index 70ba9d4..383771e 100644 --- a/arch/arm64/include/asm/syscall.h +++ b/arch/arm64/include/asm/syscall.h @@ -18,6 +18,7 @@ #include +extern const void *sys_call_table[]; static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h index 82ce217..c335479 100644 --- a/arch/arm64/include/asm/unistd.h +++ b/arch/arm64/include/asm/unistd.h @@ -28,3 +28,5 @@ #endif #define __ARCH_WANT_SYS_CLONE #include + +#define NR_syscalls (__NR_syscalls) diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 64ce39f..f4c3c4e 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -41,6 +41,9 @@ #include #include +#define CREATE_TRACE_POINTS +#include + /* * TODO: does not yet catch signals sent when the child dies. * in exit.c or in signal.c. @@ -1076,10 +1079,12 @@ asmlinkage int syscall_trace(int dir, struct pt_regs *regs) } if (dir) { + trace_sys_exit(regs, regs->syscallno); tracehook_report_syscall_exit(regs, 0); } else { if (tracehook_report_syscall_entry(regs)) regs->syscallno = ~0UL; + trace_sys_enter(regs, regs->syscallno); } if (is_compat_task()) -- 1.7.9.5