From 2e691d482e599f6602931ffaa7d7514fdf838bf6 Mon Sep 17 00:00:00 2001
From: Blu3train <frtempra@gmail.com>
Date: Sun, 29 Oct 2023 23:14:10 +0100
Subject: [PATCH 1/2] Artemis x64 engine hook

---
 texthook/engine/match64.cc | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/texthook/engine/match64.cc b/texthook/engine/match64.cc
index 859f746..86f6b0f 100644
--- a/texthook/engine/match64.cc
+++ b/texthook/engine/match64.cc
@@ -214,6 +214,35 @@ 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;
@@ -228,6 +257,11 @@ 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;

From 9c6383d9917d9c198618fb26e18c963d93e507b8 Mon Sep 17 00:00:00 2001
From: Blu3train <frtempra@gmail.com>
Date: Sun, 29 Oct 2023 23:27:31 +0100
Subject: [PATCH 2/2] fixed code

---
 texthook/engine/match64.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/texthook/engine/match64.cc b/texthook/engine/match64.cc
index 86f6b0f..4551a46 100644
--- a/texthook/engine/match64.cc
+++ b/texthook/engine/match64.cc
@@ -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.