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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_event: associated syscall_enter trace event
  19  * @exit_event: associated syscall_exit trace event
  20  */
  21 struct syscall_metadata {
  22         const char      *name;
  23         int             nb_args;
  24         const char      **types;
  25         const char      **args;
  26
  27         struct ftrace_event_call *enter_event;
  28         struct ftrace_event_call *exit_event;
  29 };
  30
  31 #ifdef CONFIG_FTRACE_SYSCALLS
  32 extern unsigned long arch_syscall_addr(int nr);
  33 extern int syscall_name_to_nr(const char *name);
  34
  35 extern int syscall_enter_format(struct ftrace_event_call *call,
  36                                 struct trace_seq *s);
  37 extern int syscall_exit_format(struct ftrace_event_call *call,
  38                                 struct trace_seq *s);
  39 extern int syscall_enter_define_fields(struct ftrace_event_call *call);
  40 extern int syscall_exit_define_fields(struct ftrace_event_call *call);
  41 extern int reg_event_syscall_enter(struct ftrace_event_call *call);
  42 extern void unreg_event_syscall_enter(struct ftrace_event_call *call);
  43 extern int reg_event_syscall_exit(struct ftrace_event_call *call);
  44 extern void unreg_event_syscall_exit(struct ftrace_event_call *call);
  45 extern int
  46 ftrace_format_syscall(struct ftrace_event_call *call, struct trace_seq *s);
  47 enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags);
  48 enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);
  49 #endif
  50 #ifdef CONFIG_EVENT_PROFILE
  51 int reg_prof_syscall_enter(char *name);
  52 void unreg_prof_syscall_enter(char *name);
  53 int reg_prof_syscall_exit(char *name);
  54 void unreg_prof_syscall_exit(char *name);
  55
  56 #endif
  57
  58 #endif /* _TRACE_SYSCALL_H */