1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _TRACE_SYSCALL_H 3 #define _TRACE_SYSCALL_H 4 5 #include <linux/tracepoint.h> 6 #include <linux/unistd.h> 7 #include <linux/trace_events.h> 8 #include <linux/thread_info.h> 9 10 #include <asm/ptrace.h> 11 12 13 /* 14 * A syscall entry in the ftrace syscalls array. 15 * 16 * @name: name of the syscall 17 * @syscall_nr: number of the syscall 18 * @nb_args: number of parameters it takes 19 * @types: list of types as strings 20 * @args: list of args as strings (args[i] matches types[i]) 21 * @enter_fields: list of fields for syscall_enter trace event 22 * @enter_event: associated syscall_enter trace event 23 * @exit_event: associated syscall_exit trace event 24 */ 25 struct syscall_metadata { 26 const char *name; 27 int syscall_nr; 28 int nb_args; 29 const char **types; 30 const char **args; 31 struct list_head enter_fields; 32 33 struct trace_event_call *enter_event; 34 struct trace_event_call *exit_event; 35 }; 36 37 #if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) 38 static inline void syscall_tracepoint_update(struct task_struct *p) 39 { 40 if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) 41 set_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT); 42 else 43 clear_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT); 44 } 45 #else 46 static inline void syscall_tracepoint_update(struct task_struct *p) 47 { 48 } 49 #endif 50 51 #endif /* _TRACE_SYSCALL_H */ 52