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#ifndef _TRACE_SYSCALL_H
#define _TRACE_SYSCALL_H
#include <linux/tracepoint.h>
#include <linux/unistd.h>
#include <linux/ftrace_event.h>
#include <linux/thread_info.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 ftrace_event_call *enter_event;
struct ftrace_event_call *exit_event;
};
#ifdef CONFIG_FTRACE_SYSCALLS
extern 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 int
ftrace_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_EVENTS
int 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
#if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
static inline void syscall_tracepoint_update(struct task_struct *p)
{
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
set_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
else
clear_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
}
#else
static inline void syscall_tracepoint_update(struct task_struct *p)
{
}
#endif
#endif /* _TRACE_SYSCALL_H */
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