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   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
   8 #include <asm/ptrace.h>
   9
  10
  11 /*
  12  * A syscall entry in the ftrace syscalls array.
  13  *
  14  * @name: name of the syscall
  15  * @syscall_nr: number of the syscall
  16  * @nb_args: number of parameters it takes
  17  * @types: list of types as strings
  18  * @args: list of args as strings (args[i] matches types[i])
  19  * @enter_event: associated syscall_enter trace event
  20  * @exit_event: associated syscall_exit trace event
  21  */
  22 struct syscall_metadata {
  23         const char      *name;
  24         int             syscall_nr;
  25         int             nb_args;
  26         const char      **types;
  27         const char      **args;
  28
  29         struct ftrace_event_call *enter_event;
  30         struct ftrace_event_call *exit_event;
  31 };
  32
  33 #ifdef CONFIG_FTRACE_SYSCALLS
  34 extern unsigned long arch_syscall_addr(int nr);
  35
  36 extern int syscall_enter_format(struct ftrace_event_call *call,
  37                                 struct trace_seq *s);
  38 extern int syscall_exit_format(struct ftrace_event_call *call,
  39                                 struct trace_seq *s);
  40 extern int syscall_enter_define_fields(struct ftrace_event_call *call);
  41 extern int syscall_exit_define_fields(struct ftrace_event_call *call);
  42 extern int reg_event_syscall_enter(struct ftrace_event_call *call);
  43 extern void unreg_event_syscall_enter(struct ftrace_event_call *call);
  44 extern int reg_event_syscall_exit(struct ftrace_event_call *call);
  45 extern void unreg_event_syscall_exit(struct ftrace_event_call *call);
  46 extern int
  47 ftrace_format_syscall(struct ftrace_event_call *call, struct trace_seq *s);
  48 enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags);
  49 enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);
  50 #endif
  51 #ifdef CONFIG_EVENT_PROFILE
  52 int reg_prof_syscall_enter(char *name);
  53 void unreg_prof_syscall_enter(char *name);
  54 int reg_prof_syscall_exit(char *name);
  55 void unreg_prof_syscall_exit(char *name);
  56
  57 #endif
  58
  59 #endif /* _TRACE_SYSCALL_H */