include/trace/syscall.h

   1 #ifndef _TRACE_SYSCALL_H
   2 #define _TRACE_SYSCALL_H
   3
   4 #include <linux/tracepoint.h>
   5 #include <linux/unistd.h>
   6 #include <linux/ftrace_event.h>
   7 #include <linux/thread_info.h>
   8
   9 #include <asm/ptrace.h>
  10
  11
  12 /*
  13  * A syscall entry in the ftrace syscalls array.
  14  *
  15  * @name: name of the syscall
  16  * @syscall_nr: number of the syscall
  17  * @nb_args: number of parameters it takes
  18  * @types: list of types as strings
  19  * @args: list of args as strings (args[i] matches types[i])
  20  * @enter_event: associated syscall_enter trace event
  21  * @exit_event: associated syscall_exit trace event
  22  */
  23 struct syscall_metadata {
  24         const char      *name;
  25         int             syscall_nr;
  26         int             nb_args;
  27         const char      **types;
  28         const char      **args;
  29         struct list_head enter_fields;
  30
  31         struct ftrace_event_call *enter_event;
  32         struct ftrace_event_call *exit_event;
  33 };
  34
  35 #if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
  36 static inline void syscall_tracepoint_update(struct task_struct *p)
  37 {
  38         if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
  39                 set_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
  40         else
  41                 clear_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
  42 }
  43 #else
  44 static inline void syscall_tracepoint_update(struct task_struct *p)
  45 {
  46 }
  47 #endif
  48
  49 #endif /* _TRACE_SYSCALL_H */