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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
COMPAT_SYSCALL_DEFINE: infrastructure
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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arch/s390/include/asm/compat.h
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arch/s390/include/asm/compat.h
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#include <linux/sched.h>
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#include <linux/thread_info.h>
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#define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p(typeof(0?(t)0:0ULL), u64))
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#define __SC_DELOUSE(t,v) (t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v))
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#define PSW32_MASK_PER 0x40000000UL
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#define PSW32_MASK_DAT 0x04000000UL
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#define PSW32_MASK_IO 0x02000000UL
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include/linux/compat.h
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include/linux/compat.h
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#define COMPAT_USE_64BIT_TIME 0
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#endif
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#ifndef __SC_DELOUSE
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#define __SC_DELOUSE(t,v) ((t)(unsigned long)(v))
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#endif
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#define __SC_CCAST1(t1, a1) __SC_DELOUSE(t1,a1)
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#define __SC_CCAST2(t2, a2, ...) __SC_DELOUSE(t2,a2), __SC_CCAST1(__VA_ARGS__)
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#define __SC_CCAST3(t3, a3, ...) __SC_DELOUSE(t3,a3), __SC_CCAST2(__VA_ARGS__)
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#define __SC_CCAST4(t4, a4, ...) __SC_DELOUSE(t4,a4), __SC_CCAST3(__VA_ARGS__)
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#define __SC_CCAST5(t5, a5, ...) __SC_DELOUSE(t5,a5), __SC_CCAST4(__VA_ARGS__)
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#define __SC_CCAST6(t6, a6, ...) __SC_DELOUSE(t6,a6), __SC_CCAST5(__VA_ARGS__)
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#define COMPAT_SYSCALL_DEFINE1(name, ...) \
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COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_DEFINE2(name, ...) \
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COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_DEFINE3(name, ...) \
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COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_DEFINE4(name, ...) \
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COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_DEFINE5(name, ...) \
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COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_DEFINE6(name, ...) \
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COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
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#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
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#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
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asmlinkage long compat_sys##name(__SC_DECL##x(__VA_ARGS__)); \
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static inline long C_SYSC##name(__SC_DECL##x(__VA_ARGS__)); \
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asmlinkage long compat_SyS##name(__SC_LONG##x(__VA_ARGS__)) \
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{ \
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return (long) C_SYSC##name(__SC_CCAST##x(__VA_ARGS__)); \
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} \
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SYSCALL_ALIAS(compat_sys##name, compat_SyS##name); \
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static inline long C_SYSC##name(__SC_DECL##x(__VA_ARGS__))
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#else /* CONFIG_HAVE_SYSCALL_WRAPPERS */
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#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
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asmlinkage long compat_sys##name(__SC_DECL##x(__VA_ARGS__))
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#endif /* CONFIG_HAVE_SYSCALL_WRAPPERS */
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#define compat_jiffies_to_clock_t(x) \
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(((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
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