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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  * @nb_args: number of parameters it takes
  16  * @types: list of types as strings
  17  * @args: list of args as strings (args[i] matches types[i])
  18  * @enter_id: associated ftrace enter event id
  19  * @exit_id: associated ftrace exit event id
  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             nb_args;
  26         const char      **types;
  27         const char      **args;
  28         int             enter_id;
  29         int             exit_id;
  30
  31         struct ftrace_event_call *enter_event;
  32         struct ftrace_event_call *exit_event;
  33 };
  34
  35 #ifdef CONFIG_FTRACE_SYSCALLS
  36 extern unsigned long arch_syscall_addr(int nr);
  37 extern int syscall_name_to_nr(char *name);
  38 void set_syscall_enter_id(int num, int id);
  39 void set_syscall_exit_id(int num, int id);
  40 extern struct trace_event event_syscall_enter;
  41 extern struct trace_event event_syscall_exit;
  42
  43 extern int syscall_enter_format(struct ftrace_event_call *call,
  44                                 struct trace_seq *s);
  45 extern int syscall_exit_format(struct ftrace_event_call *call,
  46                                 struct trace_seq *s);
  47 extern int syscall_enter_define_fields(struct ftrace_event_call *call);
  48 extern int syscall_exit_define_fields(struct ftrace_event_call *call);
  49 extern int reg_event_syscall_enter(struct ftrace_event_call *call);
  50 extern void unreg_event_syscall_enter(struct ftrace_event_call *call);
  51 extern int reg_event_syscall_exit(struct ftrace_event_call *call);
  52 extern void unreg_event_syscall_exit(struct ftrace_event_call *call);
  53 extern int
  54 ftrace_format_syscall(struct ftrace_event_call *call, struct trace_seq *s);
  55 enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags);
  56 enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);
  57 #endif
  58 #ifdef CONFIG_EVENT_PROFILE
  59 int reg_prof_syscall_enter(char *name);
  60 void unreg_prof_syscall_enter(char *name);
  61 int reg_prof_syscall_exit(char *name);
  62 void unreg_prof_syscall_exit(char *name);
  63
  64 #endif
  65
  66 #endif /* _TRACE_SYSCALL_H */