forked from Qortal/Brooklyn
2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
#ifndef _LINUX_BITREV_H
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#define _LINUX_BITREV_H
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#include <linux/types.h>
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#ifdef CONFIG_HAVE_ARCH_BITREVERSE
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#include <asm/bitrev.h>
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#define __bitrev32 __arch_bitrev32
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#define __bitrev16 __arch_bitrev16
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#define __bitrev8 __arch_bitrev8
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#else
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extern u8 const byte_rev_table[256];
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static inline u8 __bitrev8(u8 byte)
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{
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return byte_rev_table[byte];
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}
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static inline u16 __bitrev16(u16 x)
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{
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return (__bitrev8(x & 0xff) << 8) | __bitrev8(x >> 8);
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}
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static inline u32 __bitrev32(u32 x)
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{
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return (__bitrev16(x & 0xffff) << 16) | __bitrev16(x >> 16);
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}
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#endif /* CONFIG_HAVE_ARCH_BITREVERSE */
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#define __constant_bitrev32(x) \
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({ \
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u32 __x = x; \
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__x = (__x >> 16) | (__x << 16); \
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__x = ((__x & (u32)0xFF00FF00UL) >> 8) | ((__x & (u32)0x00FF00FFUL) << 8); \
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__x = ((__x & (u32)0xF0F0F0F0UL) >> 4) | ((__x & (u32)0x0F0F0F0FUL) << 4); \
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__x = ((__x & (u32)0xCCCCCCCCUL) >> 2) | ((__x & (u32)0x33333333UL) << 2); \
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__x = ((__x & (u32)0xAAAAAAAAUL) >> 1) | ((__x & (u32)0x55555555UL) << 1); \
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__x; \
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})
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#define __constant_bitrev16(x) \
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({ \
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u16 __x = x; \
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__x = (__x >> 8) | (__x << 8); \
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__x = ((__x & (u16)0xF0F0U) >> 4) | ((__x & (u16)0x0F0FU) << 4); \
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__x = ((__x & (u16)0xCCCCU) >> 2) | ((__x & (u16)0x3333U) << 2); \
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__x = ((__x & (u16)0xAAAAU) >> 1) | ((__x & (u16)0x5555U) << 1); \
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__x; \
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})
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#define __constant_bitrev8(x) \
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({ \
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u8 __x = x; \
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__x = (__x >> 4) | (__x << 4); \
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__x = ((__x & (u8)0xCCU) >> 2) | ((__x & (u8)0x33U) << 2); \
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__x = ((__x & (u8)0xAAU) >> 1) | ((__x & (u8)0x55U) << 1); \
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__x; \
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})
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#define bitrev32(x) \
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({ \
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u32 __x = x; \
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__builtin_constant_p(__x) ? \
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__constant_bitrev32(__x) : \
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__bitrev32(__x); \
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})
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#define bitrev16(x) \
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({ \
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u16 __x = x; \
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__builtin_constant_p(__x) ? \
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__constant_bitrev16(__x) : \
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__bitrev16(__x); \
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})
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#define bitrev8(x) \
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({ \
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u8 __x = x; \
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__builtin_constant_p(__x) ? \
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__constant_bitrev8(__x) : \
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__bitrev8(__x) ; \
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})
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#endif /* _LINUX_BITREV_H */
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