From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcin Nowakowski Subject: [PATCH v3 04/11] syscall/tracing: allow arch to override syscall_get_nr for ftrace Date: Tue, 11 Oct 2016 12:42:49 +0200 Message-ID: <1476182576-15247-5-git-send-email-marcin.nowakowski@imgtec.com> References: <1476182576-15247-1-git-send-email-marcin.nowakowski@imgtec.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1476182576-15247-1-git-send-email-marcin.nowakowski@imgtec.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: linux-api@vger.kernel.org, luto@amacapital.net, rostedt@goodmis.org, Marcin Nowakowski , Ingo Molnar List-Id: linux-api@vger.kernel.org Some architectures modify syscall numbers to indicate ABI used and as a result syscall number as returned by syscall_get_nr does not correspond to the syscall number used inside the kernel. Allow an arch to provide a separate implementation for ftrace that returns the 'real' syscall number from the regs provided. This will be used by x86 in a follow-up change. Signed-off-by: Marcin Nowakowski Cc: Steven Rostedt Cc: Ingo Molnar --- kernel/trace/trace_syscalls.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c index 409f83e..0ab9b90 100644 --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -74,7 +74,11 @@ static inline bool trace_is_compat_syscall(struct pt_regs *regs) static inline int trace_get_syscall_nr(struct task_struct *task, struct pt_regs *regs) { +#ifdef arch_trace_syscall_get_nr + return arch_trace_syscall_get_nr(task, regs); +#else return syscall_get_nr(task, regs); +#endif } -- 2.7.4