CloverBootloader/MdePkg/Library/BaseMemoryLibRepStr/X64/SetMem.nasm
SergeySlice 6b33696c93 kext and kernel patches will be part of LOADER_ENTRY class
Signed-off-by: SergeySlice <sergey.slice@gmail.com>
2020-05-01 19:26:28 +03:00

41 lines
995 B
NASM

;------------------------------------------------------------------------------
;
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; Module Name:
;
; SetMem.Asm
;
; Abstract:
;
; SetMem function
;
; Notes:
;
;------------------------------------------------------------------------------
DEFAULT REL
SECTION .text
;------------------------------------------------------------------------------
; VOID *
; EFIAPI
; InternalMemSetMem(
; IN VOID *Buffer,
; IN UINTN Count,
; IN UINT8 Value
; )
;------------------------------------------------------------------------------
global ASM_PFX(InternalMemSetMem)
ASM_PFX(InternalMemSetMem):
push rdi
mov rax, r8 ; rax = Value
mov rdi, rcx ; rdi = Buffer
xchg rcx, rdx ; rcx = Count, rdx = Buffer
rep stosb
mov rax, rdx ; rax = Buffer
pop rdi
ret