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110 lines
2.8 KiB
110 lines
2.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_STRING_64_H |
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#define _ASM_X86_STRING_64_H |
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#ifdef __KERNEL__ |
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#include <linux/jump_label.h> |
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/* Written 2002 by Andi Kleen */ |
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/* Even with __builtin_ the compiler may decide to use the out of line |
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function. */ |
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#define __HAVE_ARCH_MEMCPY 1 |
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extern void *memcpy(void *to, const void *from, size_t len); |
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extern void *__memcpy(void *to, const void *from, size_t len); |
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#define __HAVE_ARCH_MEMSET |
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void *memset(void *s, int c, size_t n); |
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void *__memset(void *s, int c, size_t n); |
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#define __HAVE_ARCH_MEMSET16 |
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static inline void *memset16(uint16_t *s, uint16_t v, size_t n) |
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{ |
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long d0, d1; |
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asm volatile("rep\n\t" |
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"stosw" |
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: "=&c" (d0), "=&D" (d1) |
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: "a" (v), "1" (s), "0" (n) |
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: "memory"); |
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return s; |
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} |
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#define __HAVE_ARCH_MEMSET32 |
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static inline void *memset32(uint32_t *s, uint32_t v, size_t n) |
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{ |
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long d0, d1; |
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asm volatile("rep\n\t" |
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"stosl" |
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: "=&c" (d0), "=&D" (d1) |
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: "a" (v), "1" (s), "0" (n) |
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: "memory"); |
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return s; |
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} |
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#define __HAVE_ARCH_MEMSET64 |
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static inline void *memset64(uint64_t *s, uint64_t v, size_t n) |
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{ |
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long d0, d1; |
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asm volatile("rep\n\t" |
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"stosq" |
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: "=&c" (d0), "=&D" (d1) |
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: "a" (v), "1" (s), "0" (n) |
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: "memory"); |
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return s; |
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} |
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#define __HAVE_ARCH_MEMMOVE |
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void *memmove(void *dest, const void *src, size_t count); |
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void *__memmove(void *dest, const void *src, size_t count); |
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int memcmp(const void *cs, const void *ct, size_t count); |
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size_t strlen(const char *s); |
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char *strcpy(char *dest, const char *src); |
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char *strcat(char *dest, const char *src); |
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int strcmp(const char *cs, const char *ct); |
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#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) |
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/* |
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* For files that not instrumented (e.g. mm/slub.c) we |
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* should use not instrumented version of mem* functions. |
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*/ |
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#undef memcpy |
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#define memcpy(dst, src, len) __memcpy(dst, src, len) |
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#define memmove(dst, src, len) __memmove(dst, src, len) |
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#define memset(s, c, n) __memset(s, c, n) |
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#ifndef __NO_FORTIFY |
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#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */ |
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#endif |
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#endif |
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#ifdef CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE |
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#define __HAVE_ARCH_MEMCPY_FLUSHCACHE 1 |
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void __memcpy_flushcache(void *dst, const void *src, size_t cnt); |
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static __always_inline void memcpy_flushcache(void *dst, const void *src, size_t cnt) |
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{ |
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if (__builtin_constant_p(cnt)) { |
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switch (cnt) { |
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case 4: |
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asm ("movntil %1, %0" : "=m"(*(u32 *)dst) : "r"(*(u32 *)src)); |
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return; |
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case 8: |
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asm ("movntiq %1, %0" : "=m"(*(u64 *)dst) : "r"(*(u64 *)src)); |
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return; |
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case 16: |
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asm ("movntiq %1, %0" : "=m"(*(u64 *)dst) : "r"(*(u64 *)src)); |
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asm ("movntiq %1, %0" : "=m"(*(u64 *)(dst + 8)) : "r"(*(u64 *)(src + 8))); |
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return; |
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} |
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} |
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__memcpy_flushcache(dst, src, cnt); |
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} |
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#endif |
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#endif /* __KERNEL__ */ |
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#endif /* _ASM_X86_STRING_64_H */
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