| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 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 | #include <linux/thread_info.h> |
| 8 | |
| 9 | #include <asm/ptrace.h> |
| 10 | |
| 11 | |
| 12 | /* |
| 13 | * A syscall entry in the ftrace syscalls array. |
| 14 | * |
| 15 | * @name: name of the syscall |
| 16 | * @syscall_nr: number of the syscall |
| 17 | * @nb_args: number of parameters it takes |
| 18 | * @types: list of types as strings |
| 19 | * @args: list of args as strings (args[i] matches types[i]) |
| 20 | * @enter_event: associated syscall_enter trace event |
| 21 | * @exit_event: associated syscall_exit trace event |
| 22 | */ |
| 23 | struct syscall_metadata { |
| 24 | const char *name; |
| 25 | int syscall_nr; |
| 26 | int nb_args; |
| 27 | const char **types; |
| 28 | const char **args; |
| 29 | struct list_head enter_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 | #if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) |
| 59 | static inline void syscall_tracepoint_update(struct task_struct *p) |
| 60 | { |
| 61 | if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) |
| 62 | set_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT); |
| 63 | else |
| 64 | clear_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT); |
| 65 | } |
| 66 | #else |
| 67 | static inline void syscall_tracepoint_update(struct task_struct *p) |
| 68 | { |
| 69 | } |
| 70 | #endif |
| 71 | |
| 72 | #endif /* _TRACE_SYSCALL_H */ |