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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 #ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
  12
  13 extern void syscall_regfunc(void);
  14 extern void syscall_unregfunc(void);
  15
  16 DECLARE_TRACE_WITH_CALLBACK(syscall_enter,
  17         TP_PROTO(struct pt_regs *regs, long id),
  18         TP_ARGS(regs, id),
  19         syscall_regfunc,
  20         syscall_unregfunc
  21 );
  22
  23 DECLARE_TRACE_WITH_CALLBACK(syscall_exit,
  24         TP_PROTO(struct pt_regs *regs, long ret),
  25         TP_ARGS(regs, ret),
  26         syscall_regfunc,
  27         syscall_unregfunc
  28 );
  29
  30 #endif
  31
  32 /*
  33  * A syscall entry in the ftrace syscalls array.
  34  *
  35  * @name: name of the syscall
  36  * @nb_args: number of parameters it takes
  37  * @types: list of types as strings
  38  * @args: list of args as strings (args[i] matches types[i])
  39  * @enter_id: associated ftrace enter event id
  40  * @exit_id: associated ftrace exit event id
  41  * @enter_event: associated syscall_enter trace event
  42  * @exit_event: associated syscall_exit trace event
  43  */
  44 struct syscall_metadata {
  45         const char      *name;
  46         int             nb_args;
  47         const char      **types;
  48         const char      **args;
  49         int             enter_id;
  50         int             exit_id;
  51
  52         struct ftrace_event_call *enter_event;
  53         struct ftrace_event_call *exit_event;
  54 };
  55
  56 #ifdef CONFIG_FTRACE_SYSCALLS
  57 extern struct syscall_metadata *syscall_nr_to_meta(int nr);
  58 extern int syscall_name_to_nr(char *name);
  59 void set_syscall_enter_id(int num, int id);
  60 void set_syscall_exit_id(int num, int id);
  61 extern struct trace_event event_syscall_enter;
  62 extern struct trace_event event_syscall_exit;
  63 extern int reg_event_syscall_enter(void *ptr);
  64 extern void unreg_event_syscall_enter(void *ptr);
  65 extern int reg_event_syscall_exit(void *ptr);
  66 extern void unreg_event_syscall_exit(void *ptr);
  67 extern int syscall_enter_format(struct ftrace_event_call *call,
  68                                 struct trace_seq *s);
  69 extern int syscall_exit_format(struct ftrace_event_call *call,
  70                                 struct trace_seq *s);
  71 extern int syscall_enter_define_fields(struct ftrace_event_call *call);
  72 extern int syscall_exit_define_fields(struct ftrace_event_call *call);
  73 enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags);
  74 enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);
  75 #endif
  76 #ifdef CONFIG_EVENT_PROFILE
  77 int reg_prof_syscall_enter(char *name);
  78 void unreg_prof_syscall_enter(char *name);
  79 int reg_prof_syscall_exit(char *name);
  80 void unreg_prof_syscall_exit(char *name);
  81
  82 #endif
  83
  84 #endif /* _TRACE_SYSCALL_H */