// struct FILEINFO fi2 = {0, "", {{0, 0, 0}, {0, 0, 0}}};
00401D8B mov dword ptr [ebp-150h],0
00401D95 mov cl,byte ptr [string "" (00428d80)]
00401D9B mov byte ptr [ebp-14Ch],cl
00401DA1 xor edx,edx
00401DA3 mov dword ptr [ebp-14Bh],edx
00401DA9 mov dword ptr [ebp-147h],edx
00401DAF mov dword ptr [ebp-143h],edx
00401DB5 mov dword ptr [ebp-13Ch],0
00401DBF mov dword ptr [ebp-138h],0
00401DC9 mov dword ptr [ebp-134h],0
00401DD3 mov dword ptr [ebp-130h],0
00401DDD mov dword ptr [ebp-12Ch],0
00401DE7 mov dword ptr [ebp-128h],0
// struct FILEINFO fi4 = {0};
00401504 mov dword ptr [ebp-27Ch],0
0040150E mov ecx,47h
00401513 xor eax,eax
00401515 lea edi,[ebp-278h]
0040151B rep stos dword ptr [edi]
// memset(&f5, 0, sizeof(struct FILEINFO)); 0040151D push 120h 00401522 push 0 00401524 lea eax,[ebp-39Ch] 0040152A push eax 0040152B call memset (00406630) 00401530 add esp,0Ch
Code for memset:
memset proc
.FPO ( 0, 3, 0, 0, 0, 0 )
mov edx,[esp + 0ch] ; edx = "count"
mov ecx,[esp + 4] ; ecx points to "dst"
test edx,edx ; 0?
jz short toend ; if so, nothing to do
xor eax,eax
mov al,[esp + 8] ; the byte "value" to be stored
; Align address on dword boundary
push edi ; preserve edi
mov edi,ecx ; edi = dest pointer
cmp edx,4 ; if it's less then 4 bytes
jb tail ; tail needs edi and edx to be initialized
neg ecx
and ecx,3 ; ecx = # bytes before dword boundary
jz short dwords ; jump if address already aligned
sub edx,ecx ; edx = adjusted count (for later)
adjust_loop:
mov [edi],al
inc edi
dec ecx
jnz adjust_loop
dwords:
; set all 4 bytes of eax to [value]
mov ecx,eax ; ecx=0/0/0/value
shl eax,8 ; eax=0/0/value/0
add eax,ecx ; eax=0/0val/val
mov ecx,eax ; ecx=0/0/val/val
shl eax,10h ; eax=val/val/0/0
add eax,ecx ; eax = all 4 bytes = [value]
; Set dword-sized blocks
mov ecx,edx ; move original count to ecx
and edx,3 ; prepare in edx byte count (for tail loop)
shr ecx,2 ; adjust ecx to be dword count
jz tail ; jump if it was less then 4 bytes
rep stosd
main_loop_tail:
test edx,edx ; if there is no tail bytes,
jz finish ; we finish, and it's time to leave
; Set remaining bytes
tail:
mov [edi],al ; set remaining bytes
inc edi
dec edx ; if there is some more bytes
jnz tail ; continue to fill them
; Done
finish:
mov eax,[esp + 8] ; return dest pointer
pop edi ; restore edi
ret
toend:
mov eax,[esp + 4] ; return dest pointer
ret
memset endp