89 lines
2.0 KiB
NASM
89 lines
2.0 KiB
NASM
|
|
|
|
; Copyright (c) 1989 Microsoft Corporation
|
|
|
|
; Module Name:
|
|
|
|
; kdstr.asm
|
|
|
|
; Abstract:
|
|
|
|
; Author:
|
|
|
|
; Environment:
|
|
|
|
; Revision History:
|
|
|
|
|
|
|
|
.386p
|
|
include mac386.inc
|
|
include callconv.inc ; calling convention macros
|
|
|
|
_TEXT SEGMENT DWORD PUBLIC 'CODE'
|
|
ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING
|
|
|
|
|
|
|
|
; PUCHAR
|
|
; KdpCopyDataToStack(
|
|
; IN PUCHAR Data,
|
|
; IN ULONG Length
|
|
; )
|
|
|
|
; Routine Description:
|
|
|
|
; This routine moves the specified amount of data bytes onto the callers
|
|
; stack. The callers ESP is adjust to account for the storage.
|
|
|
|
; Arguments:
|
|
|
|
; (esp) - return address
|
|
|
|
; Data (esp+4) - supplies point to the string to copy
|
|
|
|
; Length (esp+8) - Length of data to copy
|
|
|
|
; MaximumLength (esp+
|
|
|
|
; Return Value:
|
|
|
|
; Pointer to copied data
|
|
|
|
|
|
cPublicProc _KdpCopyDataToStack ,2
|
|
pop eax ; (eax) = return address
|
|
pop edx ; (edx) = data pointer
|
|
pop ecx ; (ecx) = length
|
|
|
|
sub esp, ecx ; make space on callers stack
|
|
sub esp, 4
|
|
and esp, not 3 ; round stack to a DWORD boundry
|
|
|
|
push ecx ; restore parameters onto new stack location
|
|
push edx
|
|
push eax
|
|
|
|
push edi
|
|
push esi ; save C registers
|
|
|
|
mov esi, edx ; (esi) = source
|
|
mov eax, esp
|
|
add eax, 5*4 ; adjust for local stack
|
|
mov edi, eax ; (edi) = dest stack address
|
|
mov edx, ecx ; (edx) = number of bytes
|
|
shr ecx, 2 ; # of dwords
|
|
rep movsd ; move dwords
|
|
mov ecx, edx
|
|
and ecx, 3 ; # of remaining bytes
|
|
rep movsb ; move bytes
|
|
|
|
pop esi
|
|
pop edi ; restore C registers
|
|
stdRET _KdpCopyDataToStack ; (eax) = dest stack address
|
|
|
|
stdENDP _KdpCopyDataToStack
|
|
|
|
_TEXT ends
|
|
end
|