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Cube-World-Mod-Launcher
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try to increase compatibility with varying systems

This commit is contained in:
ChrisMiuchiz 2019-10-19 20:00:39 -04:00
parent 02bd700547
commit 0ba9eb4078
1 changed files with 22 additions and 33 deletions
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55
CubeModLoader/main.cpp
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@ -21,10 +21,8 @@ using namespace std;
void* base; // Module base
vector <DLL*> modDLLs; // Every mod we've loaded
HMODULE hSelf; // A handle to ourself, to prevent being unloaded
void* initterm_e; // A pointer to a function which is run extremely soon after starting, or after being unpacked
const size_t BYTES_TO_MOVE = 14; // The size of a far jump
char initterm_e_remember[BYTES_TO_MOVE]; // We'll use this to store the code we overwrite in initterm_e, so we can put it back later.
void** initterm_eReference; // A pointer-pointer to a function which is run extremely soon after starting, or after being unpacked
void* initterm_e; // A pointer to that function
#include "callbacks/ChatHandler.h"
#include "callbacks/P2PRequestHandler.h"
@ -123,9 +121,6 @@ void no_optimize ASMStartMods() {
// Initialize mods and callbacks
"call [StartMods_ptr] \n"
// We can put initterm_e back how we found it.
"call [CopyInitializationBack_ptr] \n"
RESTORE_STACK
POP_ALL
@ -135,38 +130,31 @@ void no_optimize ASMStartMods() {
}
void PatchFreeImage(){
// Thanks to frognik for showing off this method!
// Patch FreeImage, because Windows 8 and higher do not work properly with it.
DWORD oldProtect;
void* patchaddr = (void*)GetModuleHandleA("FreeImage.dll") + 0x1E8C12;
VirtualProtect((LPVOID)patchaddr, 8, PAGE_EXECUTE_READWRITE, &oldProtect);
*(uint64_t*)patchaddr = 0x909090000000A8E9;
void* patchaddr = (void*)GetModuleHandleA("FreeImage.dll") + 0x1E8C4E;
VirtualProtect((LPVOID)patchaddr, 9, PAGE_EXECUTE_READWRITE, &oldProtect);
memset(patchaddr, 0x90, 9);
VirtualProtect((LPVOID)patchaddr, 9, oldProtect, &oldProtect);
patchaddr += 0x14;
VirtualProtect((LPVOID)patchaddr, 14, PAGE_EXECUTE_READWRITE, &oldProtect);
memset(patchaddr, 0x90, 14);
VirtualProtect((LPVOID)patchaddr, 14, oldProtect, &oldProtect);
}
void InitializationPatch() {
// Get pointer to initterm_e
initterm_e = *(void**)(base + 0x42CBD8);
void PatchInitterm_ePtr() {
// Get ** to initterm_e
initterm_eReference = (void**)(base + 0x42CBD8);
// Store old code, we'll copy it back once we regain control.
memcpy(initterm_e_remember, initterm_e, BYTES_TO_MOVE);
initterm_e = *initterm_eReference;
// Write a jump to our code
WriteFarJMP(initterm_e, (void*)&ASMStartMods);
DWORD oldProtect;
VirtualProtect((LPVOID)initterm_eReference, 8, PAGE_EXECUTE_READWRITE, &oldProtect);
*initterm_eReference = (void*)&ASMStartMods;
VirtualProtect((LPVOID)initterm_eReference, 8, oldProtect, &oldProtect);
}
// This restores initterm_e to how it was before we hijacked it.
void CopyInitializationBack() {
DWORD dwOldProtection;
VirtualProtect(initterm_e, BYTES_TO_MOVE, PAGE_EXECUTE_READWRITE, &dwOldProtection);
memcpy(initterm_e, initterm_e_remember, BYTES_TO_MOVE);
VirtualProtect(initterm_e, BYTES_TO_MOVE, dwOldProtection, &dwOldProtection);
return;
}
void* CopyInitializationBack_ptr = (void*)&CopyInitializationBack;
void Popup(const char* title, const char* msg ) {
MessageBoxA(0, msg, title, MB_OK | MB_ICONINFORMATION);
}
@ -202,6 +190,7 @@ extern "C" __declspec(dllexport) BOOL APIENTRY DllMain(HINSTANCE hinstDLL, DWORD
switch (fdwReason) {
case DLL_PROCESS_ATTACH:
already_initialized_mtx.lock();
if (already_initialized) {
already_initialized_mtx.unlock();
@ -236,7 +225,7 @@ extern "C" __declspec(dllexport) BOOL APIENTRY DllMain(HINSTANCE hinstDLL, DWORD
uint32_t checksum = crc32_file(cubePath);
if (checksum == CUBE_PACKED_CRC || checksum == CUBE_UNPACKED_CRC) {
// Patch some code to run StartMods. This method makes it work with AND without SteamStub.
InitializationPatch();
PatchInitterm_ePtr();
} else {
sprintf(msg, "%s does not seem to be version %s. CRC %08X", cubePath, CUBE_VERSION, checksum);
Popup("Error", msg);