333 lines
10 KiB
C++
333 lines
10 KiB
C++
#include "libutils.h"
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#include <windows.h>
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#include <psapi.h>
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#include <shlwapi.h>
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#include "logging.h"
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#include "utils.h"
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#include "peb.h"
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std::filesystem::path libutils::module_file_name(HMODULE module) {
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std::wstring buf;
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buf.resize(MAX_PATH + 1);
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while (true) {
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auto size = GetModuleFileNameW(nullptr, buf.data(), buf.capacity());
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if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
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buf.resize(size);
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break;
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}
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buf.resize(buf.size() * 2);
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}
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return std::filesystem::path(std::move(buf));
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}
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static inline void load_library_fail(const std::string &file_name, bool fatal) {
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std::string info_str { fmt::format(
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"\n\nPlease check if {} exists and the permissions are fine.\n"
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"If the problem still persists, try installing:\n"
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"* DirectX End-User Runtimes (June 2010) \n"
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" https://www.microsoft.com/en-us/download/details.aspx?id=8109 \n"
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"* Microsoft Visual C++ Redistributable Runtimes (*all* versions, x86 *AND* x64)\n"
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" https://github.com/abbodi1406/vcredist (recommended All-In-One installer)\n"
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" You may need to run the installer *multiple times* and reboot after each install\n"
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"* Running Windows 10 \"N\" or \"KN\" Editions?\n"
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" Grab: https://www.microsoft.com/en-us/software-download/mediafeaturepack \n"
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" Check: https://support.microsoft.com/en-us/help/4562569/media-feature-pack-for-windows-10-n-may-2020 \n"
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"* Running Windows 7 \"N\" or \"KN\" Editions?\n"
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" x86: https://web.archive.org/web/20190810145509/https://download.microsoft.com/download/B/9/B/B9BED058-8669-490E-BA61-D502E4E8BEB1/Windows6.1-KB968211-x86-RefreshPkg.msu \n"
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" x64: https://web.archive.org/web/20190810145509/https://download.microsoft.com/download/B/9/B/B9BED058-8669-490E-BA61-D502E4E8BEB1/Windows6.1-KB968211-x64-RefreshPkg.msu \n"
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"* Still have problems after installing above?\n"
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" Ensure you do NOT have multiple copies of the game DLLs\n"
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" Ensure the game DLLs are in the correct place, and double check -modules parameter\n"
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" Certain games require specific NVIDIA DLLs when running with AMD/Intel GPUs (hint: look inside stub directory)\n"
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" Find the missing dependency using:\n"
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" https://github.com/lucasg/Dependencies (recommended for most) \n"
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" http://www.dependencywalker.com/ (for old OS) \n"
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, file_name) };
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if (fatal) {
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log_fatal("libutils", "{}", info_str);
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} else {
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log_warning("libutils", "{}", info_str);
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}
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}
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HMODULE libutils::load_library(const char *module_name, bool fatal) {
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HMODULE module = LoadLibraryA(module_name);
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if (!module) {
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log_warning("libutils", "'{}' couldn't be loaded: {}", module_name, get_last_error_string());
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std::string file_name(PathFindFileNameA(module_name));
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load_library_fail(file_name, fatal);
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}
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return module;
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}
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HMODULE libutils::load_library(const std::filesystem::path &path, bool fatal) {
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HMODULE module = LoadLibraryW(path.c_str());
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if (!module) {
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log_warning("libutils", "'{}' couldn't be loaded: {}", path.string(), get_last_error_string());
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load_library_fail(path.filename().string(), fatal);
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}
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return module;
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}
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HMODULE libutils::try_library(const char *module_name) {
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return LoadLibraryA(module_name);
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}
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HMODULE libutils::try_library(const std::filesystem::path &path) {
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return LoadLibraryW(path.c_str());
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}
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HMODULE libutils::get_module(const char *module_name) {
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HMODULE module = GetModuleHandleA(module_name);
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if (!module) {
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log_fatal("libutils", "'{}' could not be loaded: {}", module_name, get_last_error_string());
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}
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return module;
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}
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HMODULE libutils::try_module(const char *module_name) {
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return GetModuleHandleA(module_name);
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}
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HMODULE libutils::try_module(const std::filesystem::path &module_path) {
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return GetModuleHandleW(module_path.c_str());
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}
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FARPROC libutils::get_proc(const char *proc_name) {
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// iterate loaded modules
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auto cur_entry = peb::entry_first();
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while (cur_entry != nullptr) {
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// check if this module contains the function
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auto proc = try_proc(reinterpret_cast<HMODULE>(cur_entry->DllBase), proc_name);
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if (proc) {
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return proc;
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}
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// next entry
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cur_entry = peb::entry_next(cur_entry);
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}
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// function not found
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log_fatal("libutils", "'{}' not found", proc_name);
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return 0;
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}
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FARPROC libutils::get_proc(HMODULE module, LPCSTR proc) {
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auto value = GetProcAddress(module, proc);
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if (!value) {
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log_fatal("libutils", "'{}' not found", proc);
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}
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return value;
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}
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FARPROC libutils::get_proc_list(HMODULE module, std::initializer_list<const char *> list) {
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FARPROC value = nullptr;
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for (auto proc_name : list) {
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value = GetProcAddress(module, proc_name);
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if (value) {
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return value;
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}
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}
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// error out
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log_fatal("libutils", "{} not found", *list.begin());
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return nullptr;
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}
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FARPROC libutils::try_proc(const char *proc_name) {
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// iterate loaded modules
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auto cur_entry = peb::entry_first();
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while (cur_entry != nullptr) {
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// check if this module contains the function
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auto proc = try_proc(reinterpret_cast<HMODULE>(cur_entry->DllBase), proc_name);
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if (proc) {
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return proc;
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}
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// next entry
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cur_entry = peb::entry_next(cur_entry);
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}
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// function not found
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return 0;
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}
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FARPROC libutils::try_proc(HMODULE module, const char *proc_name) {
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FARPROC value = GetProcAddress(module, proc_name);
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if (!value) {
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return 0;
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}
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return value;
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}
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FARPROC libutils::try_proc_list(HMODULE module, std::initializer_list<const char *> list) {
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for (auto proc_name : list) {
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auto value = GetProcAddress(module, proc_name);
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if (value) {
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return value;
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}
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}
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return nullptr;
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}
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intptr_t libutils::rva2offset(IMAGE_NT_HEADERS *nt_headers, intptr_t rva) {
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// iterate sections
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const auto section_count = nt_headers->FileHeader.NumberOfSections;
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const IMAGE_SECTION_HEADER *section_header = IMAGE_FIRST_SECTION(nt_headers);
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for (size_t i = 0; i < section_count; i++) {
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// check if RVA is within section
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if (section_header->VirtualAddress <= (DWORD) rva) {
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if ((section_header->VirtualAddress + section_header->Misc.VirtualSize) > (DWORD) rva) {
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rva -= section_header->VirtualAddress;
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rva += section_header->PointerToRawData;
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return rva;
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}
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}
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// next section
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section_header++;
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}
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// offset out of bounds
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return -1;
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}
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intptr_t libutils::rva2offset(const std::filesystem::path &path, intptr_t rva) {
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// open file
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HANDLE dll_file = CreateFileW(
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path.c_str(),
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GENERIC_READ,
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FILE_SHARE_READ,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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0);
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if (!dll_file) {
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return ~0;
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}
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// create file mapping
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HANDLE dll_mapping = CreateFileMappingW(dll_file, nullptr, PAGE_READONLY, 0, 0, nullptr);
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if (!dll_mapping) {
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CloseHandle(dll_file);
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log_warning("libutils", "could not create file mapping for {}", path.string());
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return -1;
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}
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// map view of file
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LPVOID dll_file_base = MapViewOfFile(dll_mapping, FILE_MAP_READ, 0, 0, 0);
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if (!dll_file_base) {
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CloseHandle(dll_file);
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CloseHandle(dll_mapping);
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log_warning("libutils", "could not map view of file for {}", path.string());
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return -1;
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}
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// get offset
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intptr_t offset = -1;
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auto dll_dos = reinterpret_cast<PIMAGE_DOS_HEADER>(dll_file_base);
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if (dll_dos->e_magic == IMAGE_DOS_SIGNATURE) {
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auto dll_nt = reinterpret_cast<PIMAGE_NT_HEADERS>(reinterpret_cast<uint8_t *>(dll_dos) + dll_dos->e_lfanew);
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offset = libutils::rva2offset(dll_nt, rva);
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}
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// clean up and return
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UnmapViewOfFile(dll_file_base);
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CloseHandle(dll_file);
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CloseHandle(dll_mapping);
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return offset;
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}
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intptr_t libutils::offset2rva(IMAGE_NT_HEADERS *nt_headers, intptr_t offset) {
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// iterate sections
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auto section_count = nt_headers->FileHeader.NumberOfSections;
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PIMAGE_SECTION_HEADER section_header = IMAGE_FIRST_SECTION(nt_headers);
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for (int i = 0; i < section_count; i++) {
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// check if offset is within section
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if (section_header->PointerToRawData <= static_cast<DWORD>(offset)) {
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if ((section_header->PointerToRawData + section_header->SizeOfRawData) > static_cast<DWORD>(offset)) {
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offset -= section_header->PointerToRawData;
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offset += section_header->VirtualAddress;
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return offset;
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}
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}
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// next section
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section_header++;
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}
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// offset out of bounds
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return -1;
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}
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intptr_t libutils::offset2rva(const std::filesystem::path &path, intptr_t offset) {
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// open file
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HANDLE dll_file = CreateFileW(
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path.c_str(),
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GENERIC_READ,
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FILE_SHARE_READ,
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nullptr,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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0);
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if (!dll_file) {
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return -1;
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}
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// create file mapping
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HANDLE dll_mapping = CreateFileMappingW(dll_file, nullptr, PAGE_READONLY, 0, 0, nullptr);
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if (!dll_mapping) {
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log_warning("libutils", "could not create file mapping for {}: {}", path.string(), get_last_error_string());
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CloseHandle(dll_file);
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return -1;
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}
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// map view of file
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LPVOID dll_file_base = MapViewOfFile(dll_mapping, FILE_MAP_READ, 0, 0, 0);
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if (!dll_file_base) {
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log_warning("libutils", "could not map view of file for {}: {}", path.string(), get_last_error_string());
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CloseHandle(dll_file);
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CloseHandle(dll_mapping);
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return -1;
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}
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// get RVA
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intptr_t rva = -1;
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auto dll_dos = reinterpret_cast<PIMAGE_DOS_HEADER>(dll_file_base);
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if (dll_dos->e_magic == IMAGE_DOS_SIGNATURE) {
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auto dll_nt = reinterpret_cast<PIMAGE_NT_HEADERS>(reinterpret_cast<uint8_t *>(dll_dos) + dll_dos->e_lfanew);
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rva = libutils::offset2rva(dll_nt, offset);
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}
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// clean up
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UnmapViewOfFile(dll_file_base);
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CloseHandle(dll_file);
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CloseHandle(dll_mapping);
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return rva;
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}
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