From af5395c214c15c18de3decf2229373a8c88c4fde Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Sun, 11 Nov 2018 21:51:49 -0800 Subject: xtensa: implement syscall tracepoints Add TIF_SYSCALL_TRACEPOINT flag definition; add _TIF_SYSCALL_TRACEPOINT to _TIF_WORK_MASK. Call trace_sys_enter from do_syscall_trace_enter and trace_sys_exit from do_syscall_trace_leave when TIF_SYSCALL_TRACEPOINT flag is set. Add declaration of sys_call_table to arch/xtensa/include/asm/syscall.h Add definition of NR_syscalls to arch/xtensa/include/asm/unistd.h Select HAVE_SYSCALL_TRACEPOINTS. This change allows tracing each syscall entry and exit through the ftrace mechanism. Signed-off-by: Max Filippov --- arch/xtensa/include/asm/thread_info.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'arch/xtensa/include/asm/thread_info.h') diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h index c823dddfebdf..f333f10a7650 100644 --- a/arch/xtensa/include/asm/thread_info.h +++ b/arch/xtensa/include/asm/thread_info.h @@ -106,6 +106,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_SIGPENDING 1 /* signal pending */ #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ #define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */ +#define TIF_SYSCALL_TRACEPOINT 4 /* syscall tracepoint instrumentation */ #define TIF_MEMDIE 5 /* is terminating due to OOM killer */ #define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */ #define TIF_NOTIFY_RESUME 7 /* callback before returning to user */ @@ -115,8 +116,10 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_SIGPENDING (1<