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  */
  36 struct syscall_metadata {
  37         const char      *name;
  38         int             nb_args;
  39         const char      **types;
  40         const char      **args;
  41 };
  42
  43 #ifdef CONFIG_FTRACE_SYSCALLS
  44 extern struct syscall_metadata *syscall_nr_to_meta(int nr);
  45 extern int syscall_name_to_nr(char *name);
  46 extern struct trace_event event_syscall_enter;
  47 extern struct trace_event event_syscall_exit;
  48 extern int reg_event_syscall_enter(void *ptr);
  49 extern void unreg_event_syscall_enter(void *ptr);
  50 extern int reg_event_syscall_exit(void *ptr);
  51 extern void unreg_event_syscall_exit(void *ptr);
  52 #endif
  53
  54 #endif /* _TRACE_SYSCALL_H */