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Code Issues Projects Releases Packages Wiki Activity Actions 3

Move AntiDebug to xivfixes (#2264)

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* Move AntiDebug to xivfixes

* Update BootEnabledGameFixes

* Check BootEnabledGameFixes

* Apply suggestions from code review

Co-authored-by: KazWolfe <KazWolfe@users.noreply.github.com>

---------

Co-authored-by: KazWolfe <KazWolfe@users.noreply.github.com>
This commit is contained in:
Haselnussbomber 2025-05-09 22:53:44 +02:00 • committed by GitHub
parent 4dce0c00e8
commit 33605e3ace
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GPG key ID: B5690EEEBB952194
6 changed files with 45 additions and 121 deletions
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43
Dalamud.Boot/xivfixes.cpp
View file

@ -648,6 +648,48 @@ void xivfixes::symbol_load_patches(bool bApply) {
}
}
void xivfixes::disable_game_debugging_protection(bool bApply) {
static const char* LogTag = "[xivfixes:disable_game_debugging_protection]";
static const std::vector<uint8_t> patchBytes = {
0x31, 0xC0, // XOR EAX, EAX
0x90, // NOP
0x90, // NOP
0x90, // NOP
0x90 // NOP
};
if (!bApply)
return;
if (!g_startInfo.BootEnabledGameFixes.contains("disable_game_debugging_protection")) {
logging::I("{} Turned off via environment variable.", LogTag);
return;
}
// Find IsDebuggerPresent in Framework.Tick()
const char* matchPtr = utils::signature_finder()
.look_in(utils::loaded_module(g_hGameInstance), ".text")
.look_for_hex("FF 15 ?? ?? ?? ?? 85 C0 74 13 41")
.find_one()
.Match.data();
if (!matchPtr) {
logging::E("{} Failed to find signature.", LogTag);
return;
}
void* address = const_cast<void*>(static_cast<const void*>(matchPtr));
DWORD oldProtect;
if (VirtualProtect(address, patchBytes.size(), PAGE_EXECUTE_READWRITE, &oldProtect)) {
memcpy(address, patchBytes.data(), patchBytes.size());
VirtualProtect(address, patchBytes.size(), oldProtect, &oldProtect);
logging::I("{} Patch applied at address 0x{:X}.", LogTag, reinterpret_cast<uintptr_t>(address));
} else {
logging::E("{} Failed to change memory protection.", LogTag);
}
}
void xivfixes::apply_all(bool bApply) {
for (const auto& [taskName, taskFunction] : std::initializer_list<std::pair<const char*, void(*)(bool)>>
{
@ -658,6 +700,7 @@ void xivfixes::apply_all(bool bApply) {
{ "backup_userdata_save", &backup_userdata_save },
{ "prevent_icmphandle_crashes", &prevent_icmphandle_crashes },
{ "symbol_load_patches", &symbol_load_patches },
{ "disable_game_debugging_protection", &disable_game_debugging_protection },
}
) {
try {

1
Dalamud.Boot/xivfixes.h
View file

@ -8,6 +8,7 @@ namespace xivfixes {
void backup_userdata_save(bool bApply);
void prevent_icmphandle_crashes(bool bApply);
void symbol_load_patches(bool bApply);
void disable_game_debugging_protection(bool bApply);
void apply_all(bool bApply);
}