帮我分析整理这个函数，让我好理解一点
int sub_85B450()
{
char *v0; // edi
int v1; // eax
int v2; // ebx
signed int v3; // eax
int v4; // esi
int v5; // eax
int v6; // eax
int v7; // eax
int v8; // esi
int v9; // edi
int v10; // eax
int *v11; // esi
int v12; // eax
int v13; // esi
unsigned int v14; // edx
int *v15; // ecx
int v16; // esi
int v17; // edx
_QWORD *v18; // ecx
char *v19; // ebx
__int16 v20; // cx
_WORD *v21; // edi
signed int v22; // ebx
__int16 v23; // dx
__int16 v24; // si
__int16 v25; // dx
__int16 v26; // si
__int16 v27; // dx
__int16 v28; // si
int v29; // eax
int v30; // eax
int v31; // esi
char *v32; // ebx
int v33; // edx
int v34; // ebx
int v35; // ecx
int v36; // eax
int *v37; // edi
int v38; // eax
__int128 v39; // xmm0
_DWORD *v40; // ebx
int v41; // esi
int v42; // edx
int v43; // ecx
void *v44; // esi
int v45; // eax
char *v46; // ebx
char *v47; // edx
int v48; // ecx
int v49; // ecx
_DWORD *v50; // eax
signed int v51; // edx
signed int v52; // esi
int v53; // ecx
int result; // eax
char *v55; // [esp+Ch] [ebp-3ECh]
int v56; // [esp+10h] [ebp-3E8h]
int v57; // [esp+14h] [ebp-3E4h]
int v58; // [esp+18h] [ebp-3E0h]
int v59; // [esp+1Ch] [ebp-3DCh]
_DWORD *v60; // [esp+20h] [ebp-3D8h]
int v61; // [esp+24h] [ebp-3D4h]
int v62; // [esp+28h] [ebp-3D0h]
char *v63; // [esp+2Ch] [ebp-3CCh]
int v64; // [esp+30h] [ebp-3C8h]
char *v65; // [esp+34h] [ebp-3C4h]
int v66; // [esp+38h] [ebp-3C0h]
char v67; // [esp+40h] [ebp-3B8h]
char v68; // [esp+390h] [ebp-68h]
CHAR Text; // [esp+3D4h] [ebp-24h]
if ( dword_15A6774 )
{
sub_C0B7E1((LPVOID)dword_15A6774);
dword_15A6774 = 0;
}
sub_C10BE0(&unk_350DDE0, 0, 2195456);
sub_C10BE0(&dword_EE2770, 0, 7094272);
sub_C10BE0(&unk_2CE07C0, 0, 3035136);
sub_C10BE0(&unk_ED88E0, 0, 18432);
sub_C10BE0(&unk_1660B80, 0, &unk_167FC40);
if ( dword_350DD9C != dword_350DDA0 )
{
sub_86E680(dword_350DD9C);
dword_350DDA0 = dword_350DD9C;
}
sub_C10BE0(&unk_EC0780, 0, 96);
sub_C10BE0(&dword_15A6780, 0, 761856);
sub_C10BE0(&dword_EC07E0, 0, 98304);
v0 = 0;
v63 = 0;
v1 = sub_C1D5A6((int)"YBi.cfg", (int)"rb");
v2 = v1;
v57 = 0;
v64 = 0;
if ( v1 )
{
sub_C1D88C((int)&v57, 4, 1, v1);
sub_C1D88C((int)&v64, 4, 1, v2);
v3 = v64;
dword_EC0774 = v64;
if ( v64 != 151001 )
{
sub_717CC0(&Text, 30, "CfgVer:%d SysVer:%d", v64);
MessageBoxA(0, &Text, "Error", 0);
PostMessageA(hWnd, 0x12u, 0, 0);
v3 = v64;
}
if ( v3 >= 120000 )
{
v4 = sub_C1E674(v2);
sub_C1D88C((int)&v66, 852, 1, v2);
sub_8661C0(0);
v5 = strcmp(&v67, WindowName);
if ( v5 )
v5 = -(v5 < 0) | 1;
if ( v5 )
{
dword_1660B74 = 0x2000;
sub_C1DDBA(v2, v4, 0);
v6 = dword_1660B74;
}
else
{
v6 = v66;
dword_1660B74 = v66;
}
v7 = sub_C0B7CA(852 * v6 | -(852 * (unsigned __int64)(unsigned int)v6 >> 32 != 0));
v8 = dword_1660B74;
v9 = 852 * dword_1660B74;
dword_15A6774 = v7;
sub_C10BE0(v7, 0, 852 * dword_1660B74);
dword_EE2764 = v8 - 1;
v63 = (char *)sub_C0B7CA(v9 + 64);
v0 = v63;
sub_C1D88C((int)v63, 852, dword_1660B74, v2);
sub_C1D88C((int)&v0[852 * dword_1660B74], 64, 1, v2);
}
else
{
MessageBoxA(0, "Ybi.cfg file Error3", "Error2", 0);
PostMessageA(hWnd, 0x12u, 0, 0);
}
sub_C1D88C((int)&dword_EE2770, 6928, 1024, v2);
sub_C1D88C((int)&unk_2CE07C0, 2964, 1024, v2);
v10 = 256;
if ( v64 < 150200 )
v10 = 128;
sub_C1D88C((int)&unk_ED88E0, 72, v10, v2);
sub_C1D88C((int)&unk_1660B80, 7864, 3000, v2);
sub_C1D88C((int)&unk_EC0780, 16, 6, v2);
sub_C1DDBA(v2, 1056768, 1);
if ( v64 < 151000 )
{
v11 = &dword_15A6780;
do
{
sub_C1D88C((int)v11, 104, 1, v2);
v11 += 186;
}
while ( (signed int)v11 < (signed int)&word_1660780 );
}
else
{
sub_C1D88C((int)&dword_15A6780, 744, 1024, v2);
}
sub_C1D88C((int)&dword_EC07E0, 96, 1024, v2);
sub_C1E805(v2);
}
v12 = sub_C1D5A6((int)"YBdrop.cfg", (int)"rb");
v13 = v12;
if ( v12 )
{
sub_C1D88C((int)&unk_350DDE0, 268, 0x2000, v12);
sub_C1E805(v13);
}
v14 = 0;
do
{
byte_ED87E0[v14] = (v14 >> 4) & 1 | (v14 >> 2) & 0x18 | (v14 >> 1) & 0x40 | 2
* (v14 & 3 | 4
* (v14 & 4 | 2 * (v14 & 0xF8)));
++v14;
}
while ( (signed int)v14 < 256 );
v15 = &dword_E331E8;
if ( (unsigned int)dword_E331FC > 0xF )
v15 = (int *)dword_E331E8;
if ( !(unsigned __int8)sub_85BF00(v15) )
MessageBoxA(0, "Can't read Ybq.cfg file.", "WARNING", 0);
sub_C10BE0(&v68, 0, 64);
sub_8661C0(0);
sub_8661C0(0);
sub_8661C0(0);
LOBYTE(v65) = 0;
sub_8661C0(0);
sub_8661C0(0);
sub_8661C0(0);
sub_8661C0(0);
sub_8661C0(0);
sub_8661C0(0);
if ( v64 == 151001 )
{
v16 = 852 * dword_1660B74;
sub_C10660(dword_15A6774, v0, 852 * dword_1660B74);
sub_C1CCB0(&v68, &v0[v16], 64);
}
v17 = 0;
if ( dword_1660B74 > 0 )
{
v18 = (_QWORD *)dword_15A6774;
do
{
if ( !*v18 )
break;
++v17;
v18 = (_QWORD *)((char *)v18 + 852);
}
while ( v17 < dword_1660B74 );
}
v19 = (char *)&unk_EE2ABE;
dword_15A6770 = v17;
v20 = 0;
v65 = (char *)&unk_EE2ABE;
do
{
v21 = v19;
v22 = 4;
do
{
v21 += 824;
v23 = *(v21 - 1030);
if ( v20 >= *(v21 - 1030) )
v23 = v20;
v24 = *(v21 - 824);
if ( v23 >= *(v21 - 824) )
v24 = v23;
v25 = v24;
v26 = *(v21 - 618);
if ( v25 >= *(v21 - 618) )
v26 = v25;
v27 = v26;
v28 = *(v21 - 412);
if ( v27 >= *(v21 - 412) )
v28 = v27;
v20 = v28;
--v22;
}
while ( v22 );
v19 = v65 + 6928;
v65 = v19;
}
while ( (signed int)v19 < (signed int)&unk_15A6ABE );
dword_2FC57D0 = v28;
if ( v63 )
sub_C0B7E1(v63);
v29 = strcmp(&v68, "dfficvvifvdfher89429338jwesjcnasidneufhrfdfha23p3rwe23323ncdnhj");
if ( v29 )
v29 = -(v29 < 0) | 1;
if ( v29 )
{
MessageBoxA(0, "Ybi.cfg Global Code Error1", "Error", 0);
PostMessageA(hWnd, 0x12u, 0, 0);
}
v30 = sub_C1D5A6((int)"SetItem.cfg", (int)"rb");
v31 = v30;
v56 = v30;
if ( v30 )
{
sub_C1D88C((int)&dword_EC076C, 4, 1, v30);
sub_C1D88C((int)&dword_EC0770, 4, 1, v31);
if ( dword_EC076C < 1 || dword_EC0770 < 1 )
{
MessageBoxA(0, "SetItem.cfg Not found count", "Warning", 0);
sub_C1E805(v31);
}
else
{
v32 = (char *)sub_C0B7CA(3828 * dword_EC076C | -(3828 * (unsigned __int64)(unsigned int)dword_EC076C >> 32 != 0));
v55 = v32;
dword_2FC57DC = sub_C0B7CA(5108 * dword_EC076C | -(5108 * (unsigned __int64)(unsigned int)dword_EC076C >> 32 != 0));
dword_2FC57D8 = sub_C0B7CA(68 * dword_EC0770 | -(68 * (unsigned __int64)(unsigned int)dword_EC0770 >> 32 != 0));
sub_C1D88C((int)v32, 3828, dword_EC076C, v31);
sub_C1D88C(dword_2FC57D8, 68, dword_EC0770, v31);
sub_8661C0(0);
sub_8661C0(0);
v59 = 0;
if ( dword_EC076C > 0 )
{
v33 = 0;
v34 = (int)(v32 + 232);
v65 = 0;
v58 = v34;
do
{
v35 = dword_2FC57DC;
v36 = *(_DWORD *)(v34 - 232);
v37 = (int *)v34;
v63 = 0;
v62 = v33;
*(_DWORD *)(dword_2FC57DC + v33) = v36;
v38 = v33;
*(_OWORD *)(v35 + v33 + 4) = *(_OWORD *)(v34 - 228);
*(_OWORD *)(v35 + v33 + 20) = *(_OWORD *)(v34 - 212);
*(_OWORD *)(v35 + v33 + 36) = *(_OWORD *)(v34 - 196);
v39 = *(_OWORD *)(v34 - 180);
v40 = (_DWORD *)(v34 - 164);
v60 = v40;
*(_OWORD *)(v35 + v33 + 52) = v39;
do
{
v41 = dword_2FC57DC;
v42 = *v40;
v43 = v40[1];
*(_DWORD *)(v38 + dword_2FC57DC + 68) = *v40;
*(_DWORD *)(v38 + v41 + 72) = v43;
*(_DWORD *)(v38 + v41 + 76) = 0;
v44 = v63;
if ( *(_QWORD *)v40 )
{
v45 = sub_5BD880(v42, v43);
*(_DWORD *)(v62 + dword_2FC57DC + 76) = v45;
}
v61 = 15;
v46 = &v65[(_DWORD)v44 + dword_2FC57DC + 316];
v47 = &v65[(_DWORD)v44 + dword_2FC57DC + 316];
do
{
*((_DWORD *)v47 - 1) = *(v37 - 1);
v48 = *v37;
*(_DWORD *)v47 = *v37;
*((_DWORD *)v47 + 1) = v37[1];
*((_DWORD *)v47 - 2) = 0;
if ( v48 )
{
v49 = 0;
v50 = &unk_2CE07C0;
while ( *(_DWORD *)v46 != *v50 )
{
v50 += 741;
++v49;
if ( (signed int)v50 >= (signed int)&dword_2FC57C0 )
goto LABEL_70;
}
*((_DWORD *)v47 - 2) = v49;
}
LABEL_70:
v37 += 3;
v46 += 16;
v47 += 16;
--v61;
}
while ( v61 );
v40 = v60 + 2;
v38 = v62 + 12;
v60 += 2;
v62 += 12;
v63 += 240;
}
while ( (signed int)v63 < 4800 );
v33 = (int)(v65 + 5108);
v34 = v58 + 3828;
++v59;
v65 += 5108;
v58 += 3828;
}
while ( v59 < dword_EC076C );
v31 = v56;
v32 = v55;
}
sub_C0B7E1(v32);
sub_C1E805(v31);
}
}
else
{
MessageBoxA(0, "SetItem.cfg Not found", "Warning", 0);
}
sub_A7DF20();
v51 = 0;
do
{
v52 = 0;
do
{
while ( !v52 )
{
v52 = 1;
word_2FD24A0[v51] = word_D7AA30[v51];
word_2FD22C0[v51] = word_D7A850[v51];
word_2FD2860[v51] = word_D7A670[v51];
}
v53 = v52++ + v51;
word_2FD24A0[v53] = word_2FD249E[v53] + word_D7AA30[v53];
word_2FD22C0[v53] = word_2FD22BE[v53] + word_D7A850[v53];
result = (unsigned __int16)word_D7A670[v53];
LOWORD(result) = word_2FD285E[v53] + result;
word_2FD2860[v53] = result;
}
while ( v52 < 20 );
v51 += 20;
}
while ( v51 < 240 );
return result;
}
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本文探讨了在破解过程中如何正确使用RETN指令来实现从函数调用中提前返回。详细解释了不同RETN指令（如retn、retn4、retn0C）的应用场景，以及它们如何影响堆栈指针ESP。
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