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tools/include: Add byteshift headers for endian access

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There are various hostprogs in the kernel that are rolling their own
implementations of {get,put}_unaligned_le*(). Copy the byteshift
headers from include/linux/unaligned so that they can all use a single
implementation.

This requires changing some of the data types to the userspace
exported ones (u32 -> __u32, etc).

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Link: http://lkml.kernel.org/r/1330436245-24875-2-git-send-email-matt@console-pimps.org
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Matt Fleming 2012-02-28 13:37:20 +00:00 committed by H. Peter Anvin
parent 6b21d18ed5
commit a07f7672d7
2 changed files with 140 additions and 0 deletions
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70
tools/include/tools/be_byteshift.h Normal file
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@ -0,0 +1,70 @@
#ifndef _TOOLS_BE_BYTESHIFT_H
#define _TOOLS_BE_BYTESHIFT_H
#include <linux/types.h>
static inline __u16 __get_unaligned_be16(const __u8 *p)
{
return p[0] << 8 | p[1];
}
static inline __u32 __get_unaligned_be32(const __u8 *p)
{
return p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
}
static inline __u64 __get_unaligned_be64(const __u8 *p)
{
return (__u64)__get_unaligned_be32(p) << 32 |
__get_unaligned_be32(p + 4);
}
static inline void __put_unaligned_be16(__u16 val, __u8 *p)
{
*p++ = val >> 8;
*p++ = val;
}
static inline void __put_unaligned_be32(__u32 val, __u8 *p)
{
__put_unaligned_be16(val >> 16, p);
__put_unaligned_be16(val, p + 2);
}
static inline void __put_unaligned_be64(__u64 val, __u8 *p)
{
__put_unaligned_be32(val >> 32, p);
__put_unaligned_be32(val, p + 4);
}
static inline __u16 get_unaligned_be16(const void *p)
{
return __get_unaligned_be16((const __u8 *)p);
}
static inline __u32 get_unaligned_be32(const void *p)
{
return __get_unaligned_be32((const __u8 *)p);
}
static inline __u64 get_unaligned_be64(const void *p)
{
return __get_unaligned_be64((const __u8 *)p);
}
static inline void put_unaligned_be16(__u16 val, void *p)
{
__put_unaligned_be16(val, p);
}
static inline void put_unaligned_be32(__u32 val, void *p)
{
__put_unaligned_be32(val, p);
}
static inline void put_unaligned_be64(__u64 val, void *p)
{
__put_unaligned_be64(val, p);
}
#endif /* _TOOLS_BE_BYTESHIFT_H */

70
tools/include/tools/le_byteshift.h Normal file
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#ifndef _TOOLS_LE_BYTESHIFT_H
#define _TOOLS_LE_BYTESHIFT_H
#include <linux/types.h>
static inline __u16 __get_unaligned_le16(const __u8 *p)
{
return p[0] | p[1] << 8;
}
static inline __u32 __get_unaligned_le32(const __u8 *p)
{
return p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
}
static inline __u64 __get_unaligned_le64(const __u8 *p)
{
return (__u64)__get_unaligned_le32(p + 4) << 32 |
__get_unaligned_le32(p);
}
static inline void __put_unaligned_le16(__u16 val, __u8 *p)
{
*p++ = val;
*p++ = val >> 8;
}
static inline void __put_unaligned_le32(__u32 val, __u8 *p)
{
__put_unaligned_le16(val >> 16, p + 2);
__put_unaligned_le16(val, p);
}
static inline void __put_unaligned_le64(__u64 val, __u8 *p)
{
__put_unaligned_le32(val >> 32, p + 4);
__put_unaligned_le32(val, p);
}
static inline __u16 get_unaligned_le16(const void *p)
{
return __get_unaligned_le16((const __u8 *)p);
}
static inline __u32 get_unaligned_le32(const void *p)
{
return __get_unaligned_le32((const __u8 *)p);
}
static inline __u64 get_unaligned_le64(const void *p)
{
return __get_unaligned_le64((const __u8 *)p);
}
static inline void put_unaligned_le16(__u16 val, void *p)
{
__put_unaligned_le16(val, p);
}
static inline void put_unaligned_le32(__u32 val, void *p)
{
__put_unaligned_le32(val, p);
}
static inline void put_unaligned_le64(__u64 val, void *p)
{
__put_unaligned_le64(val, p);
}
#endif /* _TOOLS_LE_BYTESHIFT_H */