#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 * @syscall_nr: number 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_event: associated syscall_enter trace event * @exit_event: associated syscall_exit trace event */struct syscall_metadata {	const char	*name;	int		syscall_nr;	int		nb_args;	const char	**types;	const char	**args;	struct list_head enter_fields;	struct list_head exit_fields; 	struct ftrace_event_call *enter_event;	struct ftrace_event_call *exit_event;}; #ifdef CONFIG_FTRACE_SYSCALLSextern unsigned long arch_syscall_addr(int nr);extern int init_syscall_trace(struct ftrace_event_call *call); extern int reg_event_syscall_enter(struct ftrace_event_call *call);extern void unreg_event_syscall_enter(struct ftrace_event_call *call);extern int reg_event_syscall_exit(struct ftrace_event_call *call);extern void unreg_event_syscall_exit(struct ftrace_event_call *call);extern intftrace_format_syscall(struct ftrace_event_call *call, struct trace_seq *s);enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags,				      struct trace_event *event);enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags,				     struct trace_event *event);#endif #ifdef CONFIG_PERF_EVENTSint perf_sysenter_enable(struct ftrace_event_call *call);void perf_sysenter_disable(struct ftrace_event_call *call);int perf_sysexit_enable(struct ftrace_event_call *call);void perf_sysexit_disable(struct ftrace_event_call *call);#endif #endif /* _TRACE_SYSCALL_H */