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hooklib/dll.c: Add LoadLibraryEx hooks

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- Initial D: Zero uses `LoadLibraryExW` to load `d3d11.dll` and `dxgi.dll`.
This commit is contained in:
Felix 2021-08-12 23:31:50 +00:00
parent 8e63a74c76
commit 96782ba672
1 changed files with 60 additions and 1 deletions
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61
hooklib/dll.c
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@ -29,6 +29,8 @@ static HMODULE WINAPI hook_GetModuleHandleA(const char *name);
static HMODULE WINAPI hook_GetModuleHandleW(const wchar_t *name);
static HMODULE WINAPI hook_LoadLibraryA(const char *name);
static HMODULE WINAPI hook_LoadLibraryW(const wchar_t *name);
static HMODULE WINAPI hook_LoadLibraryExA(const char *name, HANDLE file, DWORD flags);
static HMODULE WINAPI hook_LoadLibraryExW(const wchar_t *name, HANDLE file, DWORD flags);
/* Link pointers */
@ -37,6 +39,8 @@ static HMODULE (WINAPI *next_GetModuleHandleA)(const char *name);
static HMODULE (WINAPI *next_GetModuleHandleW)(const wchar_t *name);
static HMODULE (WINAPI *next_LoadLibraryA)(const char *name);
static HMODULE (WINAPI *next_LoadLibraryW)(const wchar_t *name);
static HMODULE (WINAPI *next_LoadLibraryExA)(const char *name, HANDLE file, DWORD flags);
static HMODULE (WINAPI *next_LoadLibraryExW)(const wchar_t *name, HANDLE file, DWORD flags);
static const struct hook_symbol dll_loader_syms[] = {
{
@ -59,6 +63,14 @@ static const struct hook_symbol dll_loader_syms[] = {
.name = "LoadLibraryW",
.patch = hook_LoadLibraryW,
.link = (void **) &next_LoadLibraryW,
}, {
.name = "LoadLibraryExA",
.patch = hook_LoadLibraryExA,
.link = (void **) &next_LoadLibraryExA,
}, {
.name = "LoadLibraryExW",
.patch = hook_LoadLibraryExW,
.link = (void **) &next_LoadLibraryExW,
}
};
@ -287,4 +299,51 @@ static HMODULE WINAPI hook_LoadLibraryW(const wchar_t *name)
return result;
}
/* TODO LoadLibraryExA, LoadLibraryExW */
static HMODULE WINAPI hook_LoadLibraryExA(const char *name, HANDLE file, DWORD flags)
{
HMODULE result;
wchar_t *name_w;
size_t name_c;
if (name == NULL) {
SetLastError(ERROR_INVALID_PARAMETER);
return NULL;
}
mbstowcs_s(&name_c, NULL, 0, name, 0);
name_w = malloc(name_c * sizeof(wchar_t));
if (name_w == NULL) {
SetLastError(ERROR_OUTOFMEMORY);
return NULL;
}
mbstowcs_s(NULL, name_w, name_c, name, name_c - 1);
result = hook_LoadLibraryExW(name_w, file, flags);
free(name_w);
return result;
}
static HMODULE WINAPI hook_LoadLibraryExW(const wchar_t *name, HANDLE file, DWORD flags)
{
HMODULE result;
if (name == NULL) {
SetLastError(ERROR_INVALID_PARAMETER);
return NULL;
}
result = dll_hook_search_dll(name);
if (result != NULL) {
SetLastError(ERROR_SUCCESS);
} else {
result = next_LoadLibraryExW(name, file, flags);
}
return result;
}