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-rw-r--r--include/linux/syscalls.h156
1 files changed, 50 insertions, 106 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 313a8e0a6553..4147d700a293 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -78,49 +78,34 @@ struct sigaltstack;
#include <linux/key.h>
#include <trace/syscall.h>
-#define __SC_DECL1(t1, a1) t1 a1
-#define __SC_DECL2(t2, a2, ...) t2 a2, __SC_DECL1(__VA_ARGS__)
-#define __SC_DECL3(t3, a3, ...) t3 a3, __SC_DECL2(__VA_ARGS__)
-#define __SC_DECL4(t4, a4, ...) t4 a4, __SC_DECL3(__VA_ARGS__)
-#define __SC_DECL5(t5, a5, ...) t5 a5, __SC_DECL4(__VA_ARGS__)
-#define __SC_DECL6(t6, a6, ...) t6 a6, __SC_DECL5(__VA_ARGS__)
-
-#define __SC_LONG1(t1, a1) long a1
-#define __SC_LONG2(t2, a2, ...) long a2, __SC_LONG1(__VA_ARGS__)
-#define __SC_LONG3(t3, a3, ...) long a3, __SC_LONG2(__VA_ARGS__)
-#define __SC_LONG4(t4, a4, ...) long a4, __SC_LONG3(__VA_ARGS__)
-#define __SC_LONG5(t5, a5, ...) long a5, __SC_LONG4(__VA_ARGS__)
-#define __SC_LONG6(t6, a6, ...) long a6, __SC_LONG5(__VA_ARGS__)
-
-#define __SC_CAST1(t1, a1) (t1) a1
-#define __SC_CAST2(t2, a2, ...) (t2) a2, __SC_CAST1(__VA_ARGS__)
-#define __SC_CAST3(t3, a3, ...) (t3) a3, __SC_CAST2(__VA_ARGS__)
-#define __SC_CAST4(t4, a4, ...) (t4) a4, __SC_CAST3(__VA_ARGS__)
-#define __SC_CAST5(t5, a5, ...) (t5) a5, __SC_CAST4(__VA_ARGS__)
-#define __SC_CAST6(t6, a6, ...) (t6) a6, __SC_CAST5(__VA_ARGS__)
-
-#define __SC_TEST(type) BUILD_BUG_ON(sizeof(type) > sizeof(long))
-#define __SC_TEST1(t1, a1) __SC_TEST(t1)
-#define __SC_TEST2(t2, a2, ...) __SC_TEST(t2); __SC_TEST1(__VA_ARGS__)
-#define __SC_TEST3(t3, a3, ...) __SC_TEST(t3); __SC_TEST2(__VA_ARGS__)
-#define __SC_TEST4(t4, a4, ...) __SC_TEST(t4); __SC_TEST3(__VA_ARGS__)
-#define __SC_TEST5(t5, a5, ...) __SC_TEST(t5); __SC_TEST4(__VA_ARGS__)
-#define __SC_TEST6(t6, a6, ...) __SC_TEST(t6); __SC_TEST5(__VA_ARGS__)
+/*
+ * __MAP - apply a macro to syscall arguments
+ * __MAP(n, m, t1, a1, t2, a2, ..., tn, an) will expand to
+ * m(t1, a1), m(t2, a2), ..., m(tn, an)
+ * The first argument must be equal to the amount of type/name
+ * pairs given. Note that this list of pairs (i.e. the arguments
+ * 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__)
+#define __MAP4(m,t,a,...) m(t,a), __MAP3(m,__VA_ARGS__)
+#define __MAP5(m,t,a,...) m(t,a), __MAP4(m,__VA_ARGS__)
+#define __MAP6(m,t,a,...) m(t,a), __MAP5(m,__VA_ARGS__)
+#define __MAP(n,...) __MAP##n(__VA_ARGS__)
+
+#define __SC_DECL(t, a) t a
+#define __TYPE_IS_LL(t) (__same_type((t)0, 0LL) || __same_type((t)0, 0ULL))
+#define __SC_LONG(t, a) __typeof(__builtin_choose_expr(__TYPE_IS_LL(t), 0LL, 0L)) a
+#define __SC_CAST(t, a) (t) a
+#define __SC_ARGS(t, a) a
+#define __SC_TEST(t, a) (void)BUILD_BUG_ON_ZERO(!__TYPE_IS_LL(t) && sizeof(t) > sizeof(long))
#ifdef CONFIG_FTRACE_SYSCALLS
-#define __SC_STR_ADECL1(t, a) #a
-#define __SC_STR_ADECL2(t, a, ...) #a, __SC_STR_ADECL1(__VA_ARGS__)
-#define __SC_STR_ADECL3(t, a, ...) #a, __SC_STR_ADECL2(__VA_ARGS__)
-#define __SC_STR_ADECL4(t, a, ...) #a, __SC_STR_ADECL3(__VA_ARGS__)
-#define __SC_STR_ADECL5(t, a, ...) #a, __SC_STR_ADECL4(__VA_ARGS__)
-#define __SC_STR_ADECL6(t, a, ...) #a, __SC_STR_ADECL5(__VA_ARGS__)
-
-#define __SC_STR_TDECL1(t, a) #t
-#define __SC_STR_TDECL2(t, a, ...) #t, __SC_STR_TDECL1(__VA_ARGS__)
-#define __SC_STR_TDECL3(t, a, ...) #t, __SC_STR_TDECL2(__VA_ARGS__)
-#define __SC_STR_TDECL4(t, a, ...) #t, __SC_STR_TDECL3(__VA_ARGS__)
-#define __SC_STR_TDECL5(t, a, ...) #t, __SC_STR_TDECL4(__VA_ARGS__)
-#define __SC_STR_TDECL6(t, a, ...) #t, __SC_STR_TDECL5(__VA_ARGS__)
+#define __SC_STR_ADECL(t, a) #a
+#define __SC_STR_TDECL(t, a) #t
extern struct ftrace_event_class event_class_syscall_enter;
extern struct ftrace_event_class event_class_syscall_exit;
@@ -155,7 +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 \
@@ -163,8 +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), \
@@ -172,26 +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__)
@@ -200,57 +178,23 @@ 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_PPC64
-#define SYSCALL_ALIAS(alias, name) \
- asm ("\t.globl " #alias "\n\t.set " #alias ", " #name "\n" \
- "\t.globl ." #alias "\n\t.set ." #alias ", ." #name)
-#else
-#if defined(CONFIG_ALPHA) || defined(CONFIG_MIPS)
-#define SYSCALL_ALIAS(alias, name) \
- asm ( #alias " = " #name "\n\t.globl " #alias)
-#else
-#define SYSCALL_ALIAS(alias, name) \
- asm ("\t.globl " #alias "\n\t.set " #alias ", " #name)
-#endif
-#endif
-
-#ifdef CONFIG_FTRACE_SYSCALLS
#define SYSCALL_DEFINEx(x, sname, ...) \
- static const char *types_##sname[] = { \
- __SC_STR_TDECL##x(__VA_ARGS__) \
- }; \
- static const char *args_##sname[] = { \
- __SC_STR_ADECL##x(__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
-
-#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
-
-#define SYSCALL_DEFINE(name) static inline long SYSC_##name
+#define __PROTECT(...) asmlinkage_protect(__VA_ARGS__)
#define __SYSCALL_DEFINEx(x, name, ...) \
- asmlinkage long sys##name(__SC_DECL##x(__VA_ARGS__)); \
- static inline long SYSC##name(__SC_DECL##x(__VA_ARGS__)); \
- asmlinkage long SyS##name(__SC_LONG##x(__VA_ARGS__)) \
+ asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
+ static inline long SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
+ asmlinkage long SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
{ \
- __SC_TEST##x(__VA_ARGS__); \
- return (long) SYSC##name(__SC_CAST##x(__VA_ARGS__)); \
+ long ret = SYSC##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \
+ __MAP(x,__SC_TEST,__VA_ARGS__); \
+ __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
+ return ret; \
} \
SYSCALL_ALIAS(sys##name, SyS##name); \
- static inline long SYSC##name(__SC_DECL##x(__VA_ARGS__))
-
-#else /* CONFIG_HAVE_SYSCALL_WRAPPERS */
-
-#define SYSCALL_DEFINE(name) asmlinkage long sys_##name
-#define __SYSCALL_DEFINEx(x, name, ...) \
- asmlinkage long sys##name(__SC_DECL##x(__VA_ARGS__))
-
-#endif /* CONFIG_HAVE_SYSCALL_WRAPPERS */
+ static inline long SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
asmlinkage long sys_time(time_t __user *tloc);
asmlinkage long sys_stime(time_t __user *tptr);
@@ -694,7 +638,7 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf);
asmlinkage long sys_semget(key_t key, int nsems, int semflg);
asmlinkage long sys_semop(int semid, struct sembuf __user *sops,
unsigned nsops);
-asmlinkage long sys_semctl(int semid, int semnum, int cmd, union semun arg);
+asmlinkage long sys_semctl(int semid, int semnum, int cmd, unsigned long arg);
asmlinkage long sys_semtimedop(int semid, struct sembuf __user *sops,
unsigned nsops,
const struct timespec __user *timeout);
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-18 07:01:27 +0000