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7f053812da
Depending on the architecture, building a 32-bit vDSO on a 64-bit kernel
is problematic when some system headers are included.
Minimise the amount of headers by moving needed items, such as
__{get,put}_unaligned_t, into dedicated common headers and in general
use more specific headers, similar to what was done in commit
8165b57bca ("linux/const.h: Extract common header for vDSO") and
commit 8c59ab839f ("lib/vdso: Enable common headers").
On some architectures this results in missing PAGE_SIZE, as was
described by commit 8b3843ae36 ("vdso/datapage: Quick fix - use
asm/page-def.h for ARM64"), so define this if necessary, in the same way
as done prior by commit cffaefd15a ("vdso: Use CONFIG_PAGE_SHIFT in
vdso/datapage.h").
Removing linux/time64.h leads to missing 'struct timespec64' in
x86's asm/pvclock.h. Add a forward declaration of that struct in
that file.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
147 lines
3.2 KiB
C
147 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_GENERIC_UNALIGNED_H
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#define __ASM_GENERIC_UNALIGNED_H
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/*
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* This is the most generic implementation of unaligned accesses
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* and should work almost anywhere.
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*/
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#include <linux/unaligned/packed_struct.h>
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#include <asm/byteorder.h>
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#include <vdso/unaligned.h>
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#define get_unaligned(ptr) __get_unaligned_t(typeof(*(ptr)), (ptr))
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#define put_unaligned(val, ptr) __put_unaligned_t(typeof(*(ptr)), (val), (ptr))
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static inline u16 get_unaligned_le16(const void *p)
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{
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return le16_to_cpu(__get_unaligned_t(__le16, p));
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}
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static inline u32 get_unaligned_le32(const void *p)
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{
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return le32_to_cpu(__get_unaligned_t(__le32, p));
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}
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static inline u64 get_unaligned_le64(const void *p)
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{
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return le64_to_cpu(__get_unaligned_t(__le64, p));
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}
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static inline void put_unaligned_le16(u16 val, void *p)
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{
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__put_unaligned_t(__le16, cpu_to_le16(val), p);
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}
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static inline void put_unaligned_le32(u32 val, void *p)
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{
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__put_unaligned_t(__le32, cpu_to_le32(val), p);
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}
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static inline void put_unaligned_le64(u64 val, void *p)
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{
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__put_unaligned_t(__le64, cpu_to_le64(val), p);
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}
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static inline u16 get_unaligned_be16(const void *p)
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{
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return be16_to_cpu(__get_unaligned_t(__be16, p));
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}
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static inline u32 get_unaligned_be32(const void *p)
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{
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return be32_to_cpu(__get_unaligned_t(__be32, p));
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}
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static inline u64 get_unaligned_be64(const void *p)
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{
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return be64_to_cpu(__get_unaligned_t(__be64, p));
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}
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static inline void put_unaligned_be16(u16 val, void *p)
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{
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__put_unaligned_t(__be16, cpu_to_be16(val), p);
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}
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static inline void put_unaligned_be32(u32 val, void *p)
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{
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__put_unaligned_t(__be32, cpu_to_be32(val), p);
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}
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static inline void put_unaligned_be64(u64 val, void *p)
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{
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__put_unaligned_t(__be64, cpu_to_be64(val), p);
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}
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static inline u32 __get_unaligned_be24(const u8 *p)
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{
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return p[0] << 16 | p[1] << 8 | p[2];
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}
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static inline u32 get_unaligned_be24(const void *p)
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{
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return __get_unaligned_be24(p);
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}
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static inline u32 __get_unaligned_le24(const u8 *p)
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{
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return p[0] | p[1] << 8 | p[2] << 16;
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}
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static inline u32 get_unaligned_le24(const void *p)
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{
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return __get_unaligned_le24(p);
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}
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static inline void __put_unaligned_be24(const u32 val, u8 *p)
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{
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*p++ = (val >> 16) & 0xff;
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*p++ = (val >> 8) & 0xff;
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*p++ = val & 0xff;
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}
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static inline void put_unaligned_be24(const u32 val, void *p)
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{
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__put_unaligned_be24(val, p);
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}
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static inline void __put_unaligned_le24(const u32 val, u8 *p)
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{
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*p++ = val & 0xff;
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*p++ = (val >> 8) & 0xff;
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*p++ = (val >> 16) & 0xff;
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}
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static inline void put_unaligned_le24(const u32 val, void *p)
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{
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__put_unaligned_le24(val, p);
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}
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static inline void __put_unaligned_be48(const u64 val, u8 *p)
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{
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*p++ = (val >> 40) & 0xff;
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*p++ = (val >> 32) & 0xff;
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*p++ = (val >> 24) & 0xff;
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*p++ = (val >> 16) & 0xff;
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*p++ = (val >> 8) & 0xff;
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*p++ = val & 0xff;
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}
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static inline void put_unaligned_be48(const u64 val, void *p)
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{
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__put_unaligned_be48(val, p);
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}
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static inline u64 __get_unaligned_be48(const u8 *p)
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{
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return (u64)p[0] << 40 | (u64)p[1] << 32 | (u64)p[2] << 24 |
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p[3] << 16 | p[4] << 8 | p[5];
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}
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static inline u64 get_unaligned_be48(const void *p)
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{
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return __get_unaligned_be48(p);
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}
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#endif /* __ASM_GENERIC_UNALIGNED_H */
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