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 /*
  12  * A syscall entry in the ftrace syscalls array.
  13  *
  14  * @name: name of the syscall
  15  * @syscall_nr: number of the syscall
  16  * @nb_args: number of parameters it takes
  17  * @types: list of types as strings
  18  * @args: list of args as strings (args[i] matches types[i])
  19  * @enter_event: associated syscall_enter trace event
  20  * @exit_event: associated syscall_exit trace event
  21  */
  22 struct syscall_metadata {
  23         const char      *name;
  24         int             syscall_nr;
  25         int             nb_args;
  26         const char      **types;
  27         const char      **args;
  28         struct list_head enter_fields;
  29         struct list_head exit_fields;
  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 init_syscall_trace(struct ftrace_event_call *call);
  38
  39 extern int reg_event_syscall_enter(struct ftrace_event_call *call);
  40 extern void unreg_event_syscall_enter(struct ftrace_event_call *call);
  41 extern int reg_event_syscall_exit(struct ftrace_event_call *call);
  42 extern void unreg_event_syscall_exit(struct ftrace_event_call *call);
  43 extern int
  44 ftrace_format_syscall(struct ftrace_event_call *call, struct trace_seq *s);
  45 enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags,
  46                                       struct trace_event *event);
  47 enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags,
  48                                      struct trace_event *event);
  49 #endif
  50
  51 #ifdef CONFIG_PERF_EVENTS
  52 int perf_sysenter_enable(struct ftrace_event_call *call);
  53 void perf_sysenter_disable(struct ftrace_event_call *call);
  54 int perf_sysexit_enable(struct ftrace_event_call *call);
  55 void perf_sysexit_disable(struct ftrace_event_call *call);
  56 #endif
  57
  58 #endif /* _TRACE_SYSCALL_H */