182 lines
6.9 KiB
C++
182 lines
6.9 KiB
C++
#include "match.h"
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#include "main.h"
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#include "texthook.h"
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#include "native/pchooks.h"
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#include "mono/monoobject.h"
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#include "mono/funcinfo.h"
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#include "engine.h"
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#include "util.h"
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namespace Engine
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{
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/** Artikash 6/7/2019
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* PPSSPP JIT code has pointers, but they are all added to an offset before being used.
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Find that offset so that hook searching works properly.
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To find the offset, find a page of mapped memory with size 0x1f00000, read and write permissions, take its address and subtract 0x8000000.
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The above is useful for emulating PSP hardware, so unlikely to change between versions.
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*/
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bool FindPPSSPP()
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{
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bool found = false;
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SYSTEM_INFO systemInfo;
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GetNativeSystemInfo(&systemInfo);
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for (BYTE* probe = NULL; probe < systemInfo.lpMaximumApplicationAddress;)
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{
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MEMORY_BASIC_INFORMATION info;
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if (!VirtualQuery(probe, &info, sizeof(info)))
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{
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probe += systemInfo.dwPageSize;
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}
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else
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{
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if (info.RegionSize == 0x1f00000 && info.Protect == PAGE_READWRITE && info.Type == MEM_MAPPED)
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{
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found = true;
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ConsoleOutput("Textractor: PPSSPP memory found: searching for hooks should yield working hook codes");
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// PPSSPP 1.8.0 compiles jal to sub dword ptr [r14+0x360],??
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memcpy(spDefault.pattern, Array<BYTE>{ 0x41, 0x83, 0xae, 0x60, 0x03, 0x00, 0x00 }, spDefault.length = 7);
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spDefault.offset = 0;
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spDefault.minAddress = 0;
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spDefault.maxAddress = -1ULL;
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spDefault.padding = (uintptr_t)probe - 0x8000000;
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spDefault.hookPostProcessor = [](HookParam& hp)
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{
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hp.type |= NO_CONTEXT | USING_SPLIT | SPLIT_INDIRECT;
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hp.split = -0x80; // r14
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hp.split_index = -8; // this is where PPSSPP 1.8.0 stores its return address stack
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};
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}
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probe += info.RegionSize;
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}
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}
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return found;
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}
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bool InsertMonoHooks(HMODULE module)
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{
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auto SpecialHookMonoString = nullptr;
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static HMODULE mono = module;
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bool ret = false;
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for (auto func : Array<MonoFunction>{ MONO_FUNCTIONS_INITIALIZER })
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{
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HookParam hp = {};
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if (!(hp.address = (uintptr_t)GetProcAddress(mono, func.functionName))) continue;
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hp.type = HOOK_EMPTY;
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NewHook(hp, "Mono Searcher");
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ret = true;
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}
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/* Artikash 2/13/2019:
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How to hook Mono/Unity3D:
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Find all standard function prologs in memory with write/execute permission: these represent possible JIT compiled functions
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Then use Mono APIs to reflect what these functions are, and hook them if they are string member functions
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Mono calling convention uses 'this' as first argument
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Must be dynamic hook bootstrapped from other mono api or mono_domain_get won't work
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*/
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trigger_fun = [](LPVOID addr, DWORD, DWORD)
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{
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static auto getDomain = (MonoDomain*(*)())GetProcAddress(mono, "mono_domain_get");
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static auto getJitInfo = (MonoObject*(*)(MonoDomain*, uintptr_t))GetProcAddress(mono, "mono_jit_info_table_find");
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static auto getName = (char*(*)(uintptr_t))GetProcAddress(mono, "mono_pmip");
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if (!getDomain || !getName || !getJitInfo) goto failed;
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static auto domain = getDomain();
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if (!domain) goto failed;
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ConsoleOutput("Textractor: Mono Dynamic ENTER (hooks = %s)", loadedConfig ? loadedConfig : "brute force");
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const BYTE prolog1[] = { 0x55, 0x48, 0x8b, 0xec };
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const BYTE prolog2[] = { 0x48, 0x83, 0xec };
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for (auto [prolog, size] : Array<const BYTE*, size_t>{ { prolog1, sizeof(prolog1) }, { prolog2, sizeof(prolog2) } })
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for (auto addr : Util::SearchMemory(prolog, size, PAGE_EXECUTE_READWRITE))
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{
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[](uint64_t addr)
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{
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__try
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{
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if (getJitInfo(domain, addr))
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if (char* name = getName(addr))
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if (strstr(name, "0x0") && ShouldMonoHook(name))
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{
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HookParam hp = {};
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hp.address = addr;
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hp.type = USING_STRING | USING_UNICODE | FULL_STRING;
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if (!loadedConfig) hp.type |= KNOWN_UNSTABLE;
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hp.offset = -0x20; // rcx
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hp.padding = 20;
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char nameForUser[HOOK_NAME_SIZE] = {};
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strncpy_s(nameForUser, name + 1, HOOK_NAME_SIZE - 1);
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if (char* end = strstr(nameForUser, " + 0x0")) *end = 0;
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if (char* end = strstr(nameForUser, "{")) *end = 0;
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hp.length_fun = [](uintptr_t, uintptr_t data)
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{
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/* Artikash 6/18/2019:
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even though this should get the true length mono uses internally
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there's still some garbage picked up on https://vndb.org/v20403 demo, don't know why */
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int len = *(int*)(data - 4);
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return len > 0 && len < PIPE_BUFFER_SIZE ? len * 2 : 0;
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};
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NewHook(hp, nameForUser);
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}
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}
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__except (EXCEPTION_EXECUTE_HANDLER) {}
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}(addr);
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}
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if (!loadedConfig) ConsoleOutput("Textractor: Mono Dynamic used brute force: if performance issues arise, please specify the correct hook in the game configuration");
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return true;
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failed:
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ConsoleOutput("Textractor: Mono Dynamic failed");
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return true;
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};
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return ret;
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}
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// Artikash 6/23/2019: V8 (JavaScript runtime) has rcx = string** at v8::String::Write
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// sample game https://www.freem.ne.jp/dl/win/18963
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bool InsertV8Hook(HMODULE module)
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{
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if (uint64_t addr = (uint64_t)GetProcAddress(module, "?Write@String@v8@@QEBAHPEAGHHH@Z"))
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{
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std::tie(spDefault.minAddress, spDefault.maxAddress) = Util::QueryModuleLimits(module);
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spDefault.maxRecords = Util::SearchMemory(spDefault.pattern, spDefault.length, PAGE_EXECUTE, spDefault.minAddress, spDefault.maxAddress).size() * 20;
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ConsoleOutput("Textractor: JavaScript hook is known to be low quality: try searching for hooks if you don't like it");
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HookParam hp = {};
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hp.type = USING_STRING | USING_UNICODE | DATA_INDIRECT;
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hp.address = addr;
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hp.offset = -0x20; // rcx
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hp.index = 0;
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hp.padding = 23;
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hp.length_fun = [](uintptr_t, uintptr_t data)
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{
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int len = *(int*)(data - 4);
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return len > 0 && len < PIPE_BUFFER_SIZE ? len * 2 : 0;
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};
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NewHook(hp, "JavaScript");
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return true;
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}
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return false;
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}
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bool UnsafeDetermineEngineType()
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{
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if (Util::CheckFile(L"PPSSPP*.exe") && FindPPSSPP()) return true;
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for (const wchar_t* moduleName : { (const wchar_t*)NULL, L"node.dll", L"nw.dll" }) if (InsertV8Hook(GetModuleHandleW(moduleName))) return true;
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if (GetModuleHandleW(L"GameAssembly.dll")) // TODO: is there a way to autofind hook?
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{
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ConsoleOutput("Textractor: Precompiled Unity found (searching for hooks should work)");
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wcscpy_s(spDefault.boundaryModule, L"GameAssembly.dll");
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spDefault.padding = 20;
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return true;
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}
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for (const wchar_t* monoName : { L"mono.dll", L"mono-2.0-bdwgc.dll" }) if (HMODULE module = GetModuleHandleW(monoName)) if (InsertMonoHooks(module)) return true;
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for (std::wstring DXVersion : { L"d3dx9", L"d3dx10" })
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if (HMODULE module = GetModuleHandleW(DXVersion.c_str())) PcHooks::hookD3DXFunctions(module);
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else for (int i = 0; i < 50; ++i)
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if (HMODULE module = GetModuleHandleW((DXVersion + L"_" + std::to_wstring(i)).c_str())) PcHooks::hookD3DXFunctions(module);
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PcHooks::hookGDIFunctions();
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PcHooks::hookGDIPlusFunctions();
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return false;
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}
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} |