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System43b engine hook

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This commit is contained in:
Blu3train 2023-08-04 00:00:32 +02:00
parent fef6ef121e
commit 39be8f2e44
1 changed files with 39 additions and 7 deletions
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46
texthook/engine/engine.cc
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@ -5529,7 +5529,7 @@ static bool InsertSystem43NewHook(ULONG startAddress, ULONG stopAddress, LPCSTR
return true; return true;
} }
bool System43New2Filter(LPVOID data, DWORD *size, HookParam *, BYTE) bool System43aFilter(LPVOID data, DWORD *size, HookParam *, BYTE)
{ {
auto text = reinterpret_cast<LPSTR>(data); auto text = reinterpret_cast<LPSTR>(data);
auto len = reinterpret_cast<size_t *>(size); auto len = reinterpret_cast<size_t *>(size);
@ -5543,7 +5543,7 @@ bool System43New2Filter(LPVOID data, DWORD *size, HookParam *, BYTE)
return true; return true;
} }
bool InsertSystem43New2Hook() bool InsertSystem43aHook()
{ {
//by Blu3train //by Blu3train
/* /*
@ -5563,7 +5563,7 @@ bool InsertSystem43New2Hook()
ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR); ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR);
ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range); ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range);
if (!addr) { if (!addr) {
ConsoleOutput("vnreng:System43new: pattern not found"); ConsoleOutput("vnreng:System43a: pattern not found");
return false; return false;
} }
HookParam hp = {}; HookParam hp = {};
@ -5571,15 +5571,47 @@ bool InsertSystem43New2Hook()
hp.offset = pusha_edx_off - 4; hp.offset = pusha_edx_off - 4;
hp.split = pusha_esp_off - 4; hp.split = pusha_esp_off - 4;
hp.type = NO_CONTEXT | USING_STRING | USING_SPLIT; hp.type = NO_CONTEXT | USING_STRING | USING_SPLIT;
hp.filter_fun = System43New2Filter; hp.filter_fun = System43aFilter;
ConsoleOutput("vnreng: INSERT System43new"); ConsoleOutput("vnreng: INSERT System43a");
NewHook(hp, "System43new"); NewHook(hp, "System43a");
return true;
}
bool InsertSystem43bHook()
{
//by Blu3train
/*
* Sample games:
* https://vndb.org/v10732
*/
const BYTE bytes[] = {
0x8B, 0xCE, // mov ecx,esi << hook here
0xE8, XX4, // call Oyakorankan.exe+13D890
0x8B, 0x43, 0x04, // mov eax,[ebx+04]
0x8D, 0x4C, 0x24, 0x10, // lea ecx,[esp+10]
0x3B, 0xC8, // cmp ecx,eax
0x73, 0x64 // jae Oyakorankan.exe+1403B2
};
ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR);
ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range);
if (!addr) {
ConsoleOutput("vnreng:System43b: pattern not found");
return false;
}
HookParam hp = {};
hp.address = addr;
hp.offset = pusha_edx_off - 4;
hp.split = 4 * 12; //arg12
hp.type = USING_STRING | USING_SPLIT;
ConsoleOutput("vnreng: INSERT System43b");
NewHook(hp, "System43b");
return true; return true;
} }
bool InsertSystem43Hook() bool InsertSystem43Hook()
{ {
if (InsertSystem43New2Hook()) if (InsertSystem43aHook() || InsertSystem43bHook())
return true; return true;
//bool patched = Util::CheckFile(L"AliceRunPatch.dll"); //bool patched = Util::CheckFile(L"AliceRunPatch.dll");
bool patched = ::GetModuleHandleA("AliceRunPatch.dll"); bool patched = ::GetModuleHandleA("AliceRunPatch.dll");