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use std::{
ffi::{c_void, CStr},
mem,
os::raw::c_ushort,
ptr,
};
use wchar::wch_c;
use winapi::{
shared::minwindef::HMODULE,
um::libloaderapi::{GetProcAddress, LoadLibraryW},
};
const NVCUDA_DEFAULT_PATH: &[u16] = wch_c!(r"C:\Windows\System32\nvcuda.dll");
const LOAD_LIBRARY_NO_REDIRECT: &'static [u8] = b"ZludaLoadLibraryW_NoRedirect\0";
include!("../../zluda_redirect/src/payload_guid.rs");
pub unsafe fn load_cuda_library() -> *mut c_void {
let load_lib = if is_detoured() {
match get_non_detoured_load_library() {
Some(load_lib) => load_lib,
None => return ptr::null_mut(),
}
} else {
LoadLibraryW
};
load_lib(NVCUDA_DEFAULT_PATH.as_ptr()) as *mut _
}
unsafe fn is_detoured() -> bool {
let mut module = ptr::null_mut();
loop {
module = detours_sys::DetourEnumerateModules(module);
if module == ptr::null_mut() {
break;
}
let mut size = 0;
let payload = detours_sys::DetourFindPayload(module, &PAYLOAD_GUID, &mut size);
if payload != ptr::null_mut() {
return true;
}
}
false
}
unsafe fn get_non_detoured_load_library(
) -> Option<unsafe extern "system" fn(*const c_ushort) -> HMODULE> {
let mut module = ptr::null_mut();
loop {
module = detours_sys::DetourEnumerateModules(module);
if module == ptr::null_mut() {
break;
}
let result = GetProcAddress(
module as *mut _,
LOAD_LIBRARY_NO_REDIRECT.as_ptr() as *mut _,
);
if result != ptr::null_mut() {
return Some(mem::transmute(result));
}
}
None
}
pub unsafe fn get_proc_address(handle: *mut c_void, func: &CStr) -> *mut c_void {
GetProcAddress(handle as *mut _, func.as_ptr()) as *mut _
}
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