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Artemis x64 engine hook #1182

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Artemis x64 engine hook #1182

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2e691d4
Artemis x64 engine hook
Blu3train Oct 29, 2023
9c6383d
fixed code
Blu3train Oct 29, 2023
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39 changes: 39 additions & 0 deletions texthook/engine/match64.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -7,8 +7,13 @@
#include "engine.h"
#include "util.h"

#define XX2 XX,XX // WORD
#define XX4 XX2,XX2 // DWORD
#define XX8 XX4,XX4 // QWORD

namespace Engine
{
enum : DWORD { X64_MAX_REL_ADDR = 0x00300000 };
/** Artikash 6/7/2019
* PPSSPP JIT code has pointers, but they are all added to an offset before being used.
Find that offset so that hook searching works properly.
Expand Down Expand Up @@ -214,6 +219,35 @@ namespace Engine
return false;
}

bool InsertArtemisHook() {
//by Blu3train
/*
* Sample games:
* https://vndb.org/v45247
*/
const BYTE bytes[] = {
0xCC, // int 3
0x40, 0x57, // push rdi <- hook here
0x48, 0x83, 0xEC, 0x40, // sub rsp,40
0x48, 0xC7, 0x44, 0x24, 0x30, XX4, // mov qword ptr [rsp+30],FFFFFFFFFFFFFFFE
0x48, 0x89, 0x5C, 0x24, 0x50 // mov [rsp+50],rbx
};

ULONG64 range = min(processStopAddress - processStartAddress, X64_MAX_REL_ADDR);
for (auto addr : Util::SearchMemory(bytes, sizeof(bytes), PAGE_EXECUTE, processStartAddress, processStartAddress + range)) {
HookParam hp = {};
hp.address = addr + 1;
hp.offset = -0x44 -4; //RDI
hp.type = USING_STRING | USING_UTF8 | NO_CONTEXT;
ConsoleOutput("vnreng: INSERT Artemis Hook ");
NewHook(hp, "Artemis");
return true;
}

ConsoleOutput("vnreng:Artemis: pattern not found");
return false;
}

bool UnsafeDetermineEngineType()
{
if (Util::CheckFile(L"PPSSPP*.exe") && FindPPSSPP()) return true;
Expand All @@ -228,6 +262,11 @@ namespace Engine
return true;
}

if (Util::CheckFile(L"*.pfs")) {
InsertArtemisHook();
return true;
}

if (Util::CheckFile(L"*.py") && InsertRenpyHook()) return true;

for (const wchar_t* monoName : { L"mono.dll", L"mono-2.0-bdwgc.dll" }) if (HMODULE module = GetModuleHandleW(monoName)) if (InsertMonoHooks(module)) return true;
Expand Down