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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  * @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
  29         struct ftrace_event_call *enter_event;
  30         struct ftrace_event_call *exit_event;
  31 };
  32
  33 #ifdef CONFIG_FTRACE_SYSCALLS
  34 extern unsigned long arch_syscall_addr(int nr);
  35 extern int init_syscall_trace(struct ftrace_event_call *call);
  36
  37 extern int syscall_enter_define_fields(struct ftrace_event_call *call);
  38 extern int syscall_exit_define_fields(struct ftrace_event_call *call);
  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 enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);
  47 #endif
  48
  49 #ifdef CONFIG_PERF_EVENTS
  50 int prof_sysenter_enable(struct ftrace_event_call *call);
  51 void prof_sysenter_disable(struct ftrace_event_call *call);
  52 int prof_sysexit_enable(struct ftrace_event_call *call);
  53 void prof_sysexit_disable(struct ftrace_event_call *call);
  54 #endif
  55
  56 #endif /* _TRACE_SYSCALL_H */