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 struct list_head enter_fields; 29 struct list_head exit_fields; 30 31 struct ftrace_event_call *enter_event; 32 struct ftrace_event_call *exit_event; 33 }; 34 35 #ifdef CONFIG_FTRACE_SYSCALLS 36 extern unsigned long arch_syscall_addr(int nr); 37 extern int init_syscall_trace(struct ftrace_event_call *call); 38 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 struct trace_event *event); 47 enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags, 48 struct trace_event *event); 49 #endif 50 51 #ifdef CONFIG_PERF_EVENTS 52 int perf_sysenter_enable(struct ftrace_event_call *call); 53 void perf_sysenter_disable(struct ftrace_event_call *call); 54 int perf_sysexit_enable(struct ftrace_event_call *call); 55 void perf_sysexit_disable(struct ftrace_event_call *call); 56 #endif 57 58 #endif /* _TRACE_SYSCALL_H */ 59