mirror of
https://github.com/limine-bootloader/limine
synced 2024-11-26 10:29:54 +03:00
78 lines
1.1 KiB
NASM
78 lines
1.1 KiB
NASM
section .text
|
|
|
|
global memcpy
|
|
memcpy:
|
|
push esi
|
|
push edi
|
|
mov eax, dword [esp+12]
|
|
mov edi, eax
|
|
mov esi, dword [esp+16]
|
|
mov ecx, dword [esp+20]
|
|
rep movsb
|
|
pop edi
|
|
pop esi
|
|
ret
|
|
|
|
global memset
|
|
memset:
|
|
push edi
|
|
mov edx, dword [esp+8]
|
|
mov edi, edx
|
|
mov eax, dword [esp+12]
|
|
mov ecx, dword [esp+16]
|
|
rep stosb
|
|
mov eax, edx
|
|
pop edi
|
|
ret
|
|
|
|
global memmove
|
|
memmove:
|
|
push esi
|
|
push edi
|
|
mov eax, dword [esp+12]
|
|
mov edi, eax
|
|
mov esi, dword [esp+16]
|
|
mov ecx, dword [esp+20]
|
|
|
|
cmp edi, esi
|
|
ja .copy_backwards
|
|
|
|
rep movsb
|
|
jmp .done
|
|
|
|
.copy_backwards:
|
|
lea edi, [edi+ecx-1]
|
|
lea esi, [esi+ecx-1]
|
|
std
|
|
rep movsb
|
|
cld
|
|
|
|
.done:
|
|
pop edi
|
|
pop esi
|
|
ret
|
|
|
|
global memcmp
|
|
memcmp:
|
|
push esi
|
|
push edi
|
|
mov edi, dword [esp+12]
|
|
mov esi, dword [esp+16]
|
|
mov ecx, dword [esp+20]
|
|
repe cmpsb
|
|
je .equal
|
|
mov al, byte [edi-1]
|
|
sub al, byte [esi-1]
|
|
movsx eax, al
|
|
jmp .done
|
|
|
|
.equal:
|
|
xor eax, eax
|
|
|
|
.done:
|
|
pop edi
|
|
pop esi
|
|
ret
|
|
|
|
section .note.GNU-stack noalloc noexec nowrite progbits
|