include/trace/syscall.h

#ifndef _TRACE_SYSCALL_H
#define _TRACE_SYSCALL_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])
 */
struct syscall_metadata {
	const char	*name;
	int		nb_args;
	const char	**types;
	const char	**args;
};

#ifdef CONFIG_FTRACE_SYSCALLS
extern void arch_init_ftrace_syscalls(void);
extern struct syscall_metadata *syscall_nr_to_meta(int nr);
extern void start_ftrace_syscalls(void);
extern void stop_ftrace_syscalls(void);
extern void ftrace_syscall_enter(struct pt_regs *regs);
extern void ftrace_syscall_exit(struct pt_regs *regs);
#else
static inline void start_ftrace_syscalls(void)			{ }
static inline void stop_ftrace_syscalls(void)			{ }
static inline void ftrace_syscall_enter(struct pt_regs *regs)	{ }
static inline void ftrace_syscall_exit(struct pt_regs *regs)	{ }
#endif

#endif /* _TRACE_SYSCALL_H */