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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:35:05 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:39:31 +0000 |
commit | 85c675d0d09a45a135bddd15d7b385f8758c32fb (patch) | |
tree | 76267dbc9b9a130337be3640948fe397b04ac629 /tools/include/nolibc/arch-x86_64.h | |
parent | Adding upstream version 6.6.15. (diff) | |
download | linux-85c675d0d09a45a135bddd15d7b385f8758c32fb.tar.xz linux-85c675d0d09a45a135bddd15d7b385f8758c32fb.zip |
Adding upstream version 6.7.7.upstream/6.7.7
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/include/nolibc/arch-x86_64.h')
-rw-r--r-- | tools/include/nolibc/arch-x86_64.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/tools/include/nolibc/arch-x86_64.h b/tools/include/nolibc/arch-x86_64.h index e5ccb926c9..68609f4219 100644 --- a/tools/include/nolibc/arch-x86_64.h +++ b/tools/include/nolibc/arch-x86_64.h @@ -173,4 +173,46 @@ void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_ __builtin_unreachable(); } +#define NOLIBC_ARCH_HAS_MEMMOVE +void *memmove(void *dst, const void *src, size_t len); + +#define NOLIBC_ARCH_HAS_MEMCPY +void *memcpy(void *dst, const void *src, size_t len); + +#define NOLIBC_ARCH_HAS_MEMSET +void *memset(void *dst, int c, size_t len); + +__asm__ ( +".section .text.nolibc_memmove_memcpy\n" +".weak memmove\n" +".weak memcpy\n" +"memmove:\n" +"memcpy:\n" + "movq %rdx, %rcx\n\t" + "movq %rdi, %rax\n\t" + "movq %rdi, %rdx\n\t" + "subq %rsi, %rdx\n\t" + "cmpq %rcx, %rdx\n\t" + "jb .Lbackward_copy\n\t" + "rep movsb\n\t" + "retq\n" +".Lbackward_copy:" + "leaq -1(%rdi, %rcx, 1), %rdi\n\t" + "leaq -1(%rsi, %rcx, 1), %rsi\n\t" + "std\n\t" + "rep movsb\n\t" + "cld\n\t" + "retq\n" + +".section .text.nolibc_memset\n" +".weak memset\n" +"memset:\n" + "xchgl %eax, %esi\n\t" + "movq %rdx, %rcx\n\t" + "pushq %rdi\n\t" + "rep stosb\n\t" + "popq %rax\n\t" + "retq\n" +); + #endif /* _NOLIBC_ARCH_X86_64_H */ |