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 * @user_arg_is_str: set if the arg for @user_arg_size is a string 20 * @user_arg_size: holds @arg that has size of the user space to read 21 * @user_mask: mask of @args that will read user space 22 * @types: list of types as strings 23 * @args: list of args as strings (args[i] matches types[i]) 24 * @enter_fields: list of fields for syscall_enter trace event 25 * @enter_event: associated syscall_enter trace event 26 * @exit_event: associated syscall_exit trace event 27 */ 28 struct syscall_metadata { 29 const char *name; 30 int syscall_nr; 31 u8 nb_args:7; 32 u8 user_arg_is_str:1; 33 s8 user_arg_size; 34 short user_mask; 35 const char **types; 36 const char **args; 37 struct list_head enter_fields; 38 39 struct trace_event_call *enter_event; 40 struct trace_event_call *exit_event; 41 }; 42 43 #if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) syscall_tracepoint_update(struct task_struct * p)44static inline void syscall_tracepoint_update(struct task_struct *p) 45 { 46 if (test_syscall_work(SYSCALL_TRACEPOINT)) 47 set_task_syscall_work(p, SYSCALL_TRACEPOINT); 48 else 49 clear_task_syscall_work(p, SYSCALL_TRACEPOINT); 50 } 51 #else syscall_tracepoint_update(struct task_struct * p)52static inline void syscall_tracepoint_update(struct task_struct *p) 53 { 54 } 55 #endif 56 57 #endif /* _TRACE_SYSCALL_H */ 58