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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-11-23 09:12:59 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-12-19 18:06:58 -0500 |
| commit | 468366138850f20543f1d4878028900672b23dae (patch) | |
| tree | 89c694a8e8cbf60656ac69a7f783a34d75288c4a | |
| parent | 541880d9a2c7871f6370071d55aa6662d329c51e (diff) | |
COMPAT_SYSCALL_DEFINE: infrastructure
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | arch/s390/include/asm/compat.h | 3 | ||||
| -rw-r--r-- | include/linux/compat.h | 42 |
2 files changed, 45 insertions, 0 deletions
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h index 18cd6b592650..f8c6df6cd1f0 100644 --- a/arch/s390/include/asm/compat.h +++ b/arch/s390/include/asm/compat.h @@ -7,6 +7,9 @@ #include <linux/sched.h> #include <linux/thread_info.h> +#define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p(typeof(0?(t)0:0ULL), u64)) +#define __SC_DELOUSE(t,v) (t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)) + #define PSW32_MASK_PER 0x40000000UL #define PSW32_MASK_DAT 0x04000000UL #define PSW32_MASK_IO 0x02000000UL diff --git a/include/linux/compat.h b/include/linux/compat.h index 784ebfe63c48..a7877fa809fd 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -23,6 +23,48 @@ #define COMPAT_USE_64BIT_TIME 0 #endif +#ifndef __SC_DELOUSE +#define __SC_DELOUSE(t,v) ((t)(unsigned long)(v)) +#endif + +#define __SC_CCAST1(t1, a1) __SC_DELOUSE(t1,a1) +#define __SC_CCAST2(t2, a2, ...) __SC_DELOUSE(t2,a2), __SC_CCAST1(__VA_ARGS__) +#define __SC_CCAST3(t3, a3, ...) __SC_DELOUSE(t3,a3), __SC_CCAST2(__VA_ARGS__) +#define __SC_CCAST4(t4, a4, ...) __SC_DELOUSE(t4,a4), __SC_CCAST3(__VA_ARGS__) +#define __SC_CCAST5(t5, a5, ...) __SC_DELOUSE(t5,a5), __SC_CCAST4(__VA_ARGS__) +#define __SC_CCAST6(t6, a6, ...) __SC_DELOUSE(t6,a6), __SC_CCAST5(__VA_ARGS__) +#define COMPAT_SYSCALL_DEFINE1(name, ...) \ + COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) +#define COMPAT_SYSCALL_DEFINE2(name, ...) \ + COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) +#define COMPAT_SYSCALL_DEFINE3(name, ...) \ + COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) +#define COMPAT_SYSCALL_DEFINE4(name, ...) \ + COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__) +#define COMPAT_SYSCALL_DEFINE5(name, ...) \ + COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__) +#define COMPAT_SYSCALL_DEFINE6(name, ...) \ + COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__) + +#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS + +#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ + asmlinkage long compat_sys##name(__SC_DECL##x(__VA_ARGS__)); \ + static inline long C_SYSC##name(__SC_DECL##x(__VA_ARGS__)); \ + asmlinkage long compat_SyS##name(__SC_LONG##x(__VA_ARGS__)) \ + { \ + return (long) C_SYSC##name(__SC_CCAST##x(__VA_ARGS__)); \ + } \ + SYSCALL_ALIAS(compat_sys##name, compat_SyS##name); \ + static inline long C_SYSC##name(__SC_DECL##x(__VA_ARGS__)) + +#else /* CONFIG_HAVE_SYSCALL_WRAPPERS */ + +#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ + asmlinkage long compat_sys##name(__SC_DECL##x(__VA_ARGS__)) + +#endif /* CONFIG_HAVE_SYSCALL_WRAPPERS */ + #define compat_jiffies_to_clock_t(x) \ (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) |