question about the function argument-- this pointer

[zhgong007]

correspoinding ASM code





sub_464060 proc near ; CODE XREF: sub_44C6D0+5A2↑p

Src= dword ptr 8

push ebp
mov ebp, esp
push ebx
push esi
mov esi, ecx
push edi
mov edi, [ebp+Src]
mov dword ptr [esi+10h], 0
mov dword ptr [esi+14h], 0
cmp dword ptr [edi+14h], 10h
mov eax, [edi+10h]
mov [ebp+Src], eax
jb short loc_464087
mov edi, [edi]


loc_464087: ; CODE XREF: sub_464060+23↑j
cmp eax, 10h
jnb short loc_4640A6
movups xmm0, xmmword ptr [edi]
mov ebx, 0Fh
pop edi
movups xmmword ptr [esi], xmm0
mov [esi+10h], eax
mov eax, esi
mov [esi+14h], ebx
pop esi
pop ebx
pop ebp
retn 4

loc_4640A6: ; CODE XREF: sub_464060+2A↑j
mov ebx, eax
mov eax, 7FFFFFFFh

or ebx, 0Fh

cmp ebx, eax
cmova ebx, eax
lea eax, [ebx+1]

cmp eax, 1000h
jb short loc_4640E4


lea ecx, [eax+23h]
cmp ecx, eax
jbe short loc_46411A


push ecx ; Size
call ??2@YAPAXI@Z ; operator new(uint)


add esp, 4
test eax, eax
jz short loc_4640DE


lea ecx, [eax+23h]
and ecx, 0FFFFFFE0h

mov [ecx-4], eax
jmp short loc_4640F7


loc_4640DE: ; CODE XREF: sub_464060+71↑j
call ds:_invalid_parameter_noinfo_noreturn


loc_4640E4: ; CODE XREF: sub_464060+5D↑j
test eax, eax
jz short loc_4640F5


push eax ; Size
call ??2@YAPAXI@Z ; operator new(uint)

add esp, 4
mov ecx, eax
jmp short loc_4640F7


loc_4640F5: ; CODE XREF: sub_464060+86↑j
xor ecx, ecx



loc_4640F7: ; CODE XREF: sub_464060+7C↑j
; sub_464060+93↑j
mov eax, [ebp+Src]
inc eax
mov [esi], ecx

push eax ; Size
push edi ; Src
push ecx ; void *
call memcpy


mov eax, [ebp+Src]
add esp, 0Ch
mov [esi+10h], eax

mov eax, esi

mov [esi+14h], ebx
pop edi
pop esi
pop ebx
pop ebp
retn 4



loc_46411A: ; CODE XREF: sub_464060+64↑j
call sub_44B280

sub_464060 endp