diff options
| -rw-r--r-- | include/linux/syscalls.h | 49 |
1 files changed, 15 insertions, 34 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 65c001f7fa0..4147d700a29 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -87,6 +87,7 @@ struct sigaltstack; * of __MAP starting at the third one) is in the same format as * for SYSCALL_DEFINE<n>/COMPAT_SYSCALL_DEFINE<n> */ +#define __MAP0(m,...) #define __MAP1(m,t,a) m(t,a) #define __MAP2(m,t,a,...) m(t,a), __MAP1(m,__VA_ARGS__) #define __MAP3(m,t,a,...) m(t,a), __MAP2(m,__VA_ARGS__) @@ -139,7 +140,13 @@ extern struct trace_event_functions exit_syscall_print_funcs; __attribute__((section("_ftrace_events"))) \ *__event_exit_##sname = &event_exit_##sname; -#define SYSCALL_METADATA(sname, nb) \ +#define SYSCALL_METADATA(sname, nb, ...) \ + static const char *types_##sname[] = { \ + __MAP(nb,__SC_STR_TDECL,__VA_ARGS__) \ + }; \ + static const char *args_##sname[] = { \ + __MAP(nb,__SC_STR_ADECL,__VA_ARGS__) \ + }; \ SYSCALL_TRACE_ENTER_EVENT(sname); \ SYSCALL_TRACE_EXIT_EVENT(sname); \ static struct syscall_metadata __used \ @@ -147,8 +154,8 @@ extern struct trace_event_functions exit_syscall_print_funcs; .name = "sys"#sname, \ .syscall_nr = -1, /* Filled in at boot */ \ .nb_args = nb, \ - .types = types_##sname, \ - .args = args_##sname, \ + .types = nb ? types_##sname : NULL, \ + .args = nb ? args_##sname : NULL, \ .enter_event = &event_enter_##sname, \ .exit_event = &event_exit_##sname, \ .enter_fields = LIST_HEAD_INIT(__syscall_meta_##sname.enter_fields), \ @@ -156,26 +163,13 @@ extern struct trace_event_functions exit_syscall_print_funcs; static struct syscall_metadata __used \ __attribute__((section("__syscalls_metadata"))) \ *__p_syscall_meta_##sname = &__syscall_meta_##sname; +#else +#define SYSCALL_METADATA(sname, nb, ...) +#endif #define SYSCALL_DEFINE0(sname) \ - SYSCALL_TRACE_ENTER_EVENT(_##sname); \ - SYSCALL_TRACE_EXIT_EVENT(_##sname); \ - static struct syscall_metadata __used \ - __syscall_meta__##sname = { \ - .name = "sys_"#sname, \ - .syscall_nr = -1, /* Filled in at boot */ \ - .nb_args = 0, \ - .enter_event = &event_enter__##sname, \ - .exit_event = &event_exit__##sname, \ - .enter_fields = LIST_HEAD_INIT(__syscall_meta__##sname.enter_fields), \ - }; \ - static struct syscall_metadata __used \ - __attribute__((section("__syscalls_metadata"))) \ - *__p_syscall_meta_##sname = &__syscall_meta__##sname; \ + SYSCALL_METADATA(_##sname, 0); \ asmlinkage long sys_##sname(void) -#else -#define SYSCALL_DEFINE0(name) asmlinkage long sys_##name(void) -#endif #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) #define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) @@ -184,22 +178,9 @@ extern struct trace_event_functions exit_syscall_print_funcs; #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__) #define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__) -#ifdef CONFIG_FTRACE_SYSCALLS #define SYSCALL_DEFINEx(x, sname, ...) \ - static const char *types_##sname[] = { \ - __MAP(x,__SC_STR_TDECL,__VA_ARGS__) \ - }; \ - static const char *args_##sname[] = { \ - __MAP(x,__SC_STR_ADECL,__VA_ARGS__) \ - }; \ - SYSCALL_METADATA(sname, x); \ + SYSCALL_METADATA(sname, x, __VA_ARGS__) \ __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) -#else -#define SYSCALL_DEFINEx(x, sname, ...) \ - __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) -#endif - -#define SYSCALL_DEFINE(name) static inline long SYSC_##name #define __PROTECT(...) asmlinkage_protect(__VA_ARGS__) #define __SYSCALL_DEFINEx(x, name, ...) \ |