#ifndef _TRACE_SYSCALL_H#define _TRACE_SYSCALL_H #include <linux/tracepoint.h>#include <linux/unistd.h>#include <linux/ftrace_event.h> #include <asm/ptrace.h>  /* * A syscall entry in the ftrace syscalls array. * * @name: name of the syscall * @nb_args: number of parameters it takes * @types: list of types as strings * @args: list of args as strings (args[i] matches types[i]) * @enter_id: associated ftrace enter event id * @exit_id: associated ftrace exit event id * @enter_event: associated syscall_enter trace event * @exit_event: associated syscall_exit trace event */struct syscall_metadata {	const char	*name;	int		nb_args;	const char	**types;	const char	**args;	int		enter_id;	int		exit_id; 	struct ftrace_event_call *enter_event;	struct ftrace_event_call *exit_event;}; #ifdef CONFIG_FTRACE_SYSCALLSextern struct syscall_metadata *syscall_nr_to_meta(int nr);extern int syscall_name_to_nr(char *name);void set_syscall_enter_id(int num, int id);void set_syscall_exit_id(int num, int id);extern struct trace_event event_syscall_enter;extern struct trace_event event_syscall_exit;extern int reg_event_syscall_enter(void *ptr);extern void unreg_event_syscall_enter(void *ptr);extern int reg_event_syscall_exit(void *ptr);extern void unreg_event_syscall_exit(void *ptr);extern int syscall_enter_format(struct ftrace_event_call *call,				struct trace_seq *s);extern int syscall_exit_format(struct ftrace_event_call *call,				struct trace_seq *s);extern int syscall_enter_define_fields(struct ftrace_event_call *call);extern int syscall_exit_define_fields(struct ftrace_event_call *call);enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags);enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);#endif#ifdef CONFIG_EVENT_PROFILEint reg_prof_syscall_enter(char *name);void unreg_prof_syscall_enter(char *name);int reg_prof_syscall_exit(char *name);void unreg_prof_syscall_exit(char *name); #endif #endif /* _TRACE_SYSCALL_H */