forked from Hay1tsme/segatools
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
#include <assert.h>
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#include <stdbool.h>
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#include "hook/table.h"
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#include "hooklib/path.h"
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#include "util/dprintf.h"
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#include "doorstop.h"
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#include "hook.h"
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static bool unity_hook_initted;
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static struct unity_config unity_config;
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static const wchar_t *target_modules[] = {
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L"mono.dll",
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L"mono-2.0-bdwgc.dll",
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L"cri_ware_unity.dll",
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};
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static const size_t target_modules_len = _countof(target_modules);
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static void dll_hook_insert_hooks(HMODULE target);
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static HMODULE WINAPI my_LoadLibraryW(const wchar_t *name);
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static HMODULE (WINAPI *next_LoadLibraryW)(const wchar_t *name);
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static const struct hook_symbol unity_kernel32_syms[] = {
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{
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.name = "LoadLibraryW",
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.patch = my_LoadLibraryW,
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.link = (void **) &next_LoadLibraryW,
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},
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};
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void unity_hook_init(const struct unity_config *cfg, HINSTANCE self) {
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assert(cfg != NULL);
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if (!cfg->enable) {
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return;
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}
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if (unity_hook_initted) {
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return;
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}
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memcpy(&unity_config, cfg, sizeof(*cfg));
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dll_hook_insert_hooks(NULL);
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unity_hook_initted = true;
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dprintf("Unity: Hook enabled.\n");
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}
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static void dll_hook_insert_hooks(HMODULE target) {
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hook_table_apply(
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target,
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"kernel32.dll",
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unity_kernel32_syms,
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_countof(unity_kernel32_syms));
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}
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static HMODULE WINAPI my_LoadLibraryW(const wchar_t *name) {
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const wchar_t *name_end;
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const wchar_t *target_module;
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bool already_loaded;
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HMODULE result;
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size_t name_len;
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size_t target_module_len;
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if (name == NULL) {
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SetLastError(ERROR_INVALID_PARAMETER);
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return NULL;
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}
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// Check if the module is already loaded
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already_loaded = GetModuleHandleW(name) != NULL;
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// Must call the next handler so the DLL reference count is incremented
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result = next_LoadLibraryW(name);
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if (!already_loaded && result != NULL) {
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name_len = wcslen(name);
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// mono entrypoint for injecting target_assembly
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if (GetProcAddress(result, "mono_jit_init_version")) {
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doorstop_mono_hook_init(&unity_config, result);
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}
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for (size_t i = 0; i < target_modules_len; i++) {
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target_module = target_modules[i];
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target_module_len = wcslen(target_module);
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// Check if the newly loaded library is at least the length of
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// the name of the target module
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if (name_len < target_module_len) {
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continue;
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}
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name_end = &name[name_len - target_module_len];
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// Check if the name of the newly loaded library is one of the
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// modules the path hooks should be injected into
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if (_wcsicmp(name_end, target_module) != 0) {
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continue;
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}
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dprintf("Unity: Loaded %S\n", target_module);
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dll_hook_insert_hooks(result);
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path_hook_insert_hooks(result);
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}
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}
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return result;
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}
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