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
   8 #include <asm/ptrace.h>
   9
  10
  11 extern void syscall_regfunc(void);
  12 extern void syscall_unregfunc(void);
  13
  14 DECLARE_TRACE_WITH_CALLBACK(syscall_enter,
  15         TP_PROTO(struct pt_regs *regs, long id),
  16         TP_ARGS(regs, id),
  17         syscall_regfunc,
  18         syscall_unregfunc
  19 );
  20
  21 DECLARE_TRACE_WITH_CALLBACK(syscall_exit,
  22         TP_PROTO(struct pt_regs *regs, long ret),
  23         TP_ARGS(regs, ret),
  24         syscall_regfunc,
  25         syscall_unregfunc
  26 );
  27
  28 /*
  29  * A syscall entry in the ftrace syscalls array.
  30  *
  31  * @name: name of the syscall
  32  * @nb_args: number of parameters it takes
  33  * @types: list of types as strings
  34  * @args: list of args as strings (args[i] matches types[i])
  35  * @enter_id: associated ftrace enter event id
  36  * @exit_id: associated ftrace exit event id
  37  */
  38 struct syscall_metadata {
  39         const char      *name;
  40         int             nb_args;
  41         const char      **types;
  42         const char      **args;
  43         int             enter_id;
  44         int             exit_id;
  45 };
  46
  47 #ifdef CONFIG_FTRACE_SYSCALLS
  48 extern struct syscall_metadata *syscall_nr_to_meta(int nr);
  49 extern int syscall_name_to_nr(char *name);
  50 void set_syscall_enter_id(int num, int id);
  51 void set_syscall_exit_id(int num, int id);
  52 extern struct trace_event event_syscall_enter;
  53 extern struct trace_event event_syscall_exit;
  54 extern int reg_event_syscall_enter(void *ptr);
  55 extern void unreg_event_syscall_enter(void *ptr);
  56 extern int reg_event_syscall_exit(void *ptr);
  57 extern void unreg_event_syscall_exit(void *ptr);
  58 enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags);
  59 enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);
  60 #endif
  61
  62 #endif /* _TRACE_SYSCALL_H */