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Implement redirecting dll

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This commit is contained in:
Andrzej Janik 2020-02-10 00:56:40 +01:00
parent cf81615203
commit 5ec4c5cf72
3 changed files with 68 additions and 1 deletions
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1
notcuda/Cargo.toml
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@ -5,4 +5,5 @@ authors = ["Andrzej Janik <vosen@vosen.pl>"]
edition = "2018"
[lib]
name = "nvcuda"
crate-type = ["cdylib"]

5
notcuda_redirect/Cargo.toml
View file

@ -8,3 +8,8 @@ edition = "2018"
crate-type = ["cdylib"]
[dependencies]
detours-sys = "0.1"
wchar = "0.6"
[target.'cfg(windows)'.dependencies]
winapi = { version = "0.3", features = ["processthreadsapi", "winbase", "winnt", "winerror", "libloaderapi", "std"] }

63
notcuda_redirect/src/lib.rs
View file

@ -1,2 +1,63 @@
extern crate detours_sys;
extern crate winapi;
use detours_sys::{
DetourAttach, DetourDetach, DetourRestoreAfterWith, DetourTransactionBegin,
DetourTransactionCommit, DetourUpdateThread,
};
use wchar::wch_c;
use winapi::shared::minwindef::{DWORD, HMODULE, TRUE};
use winapi::um::libloaderapi::LoadLibraryExW;
use winapi::um::processthreadsapi::GetCurrentThread;
use winapi::um::winbase::lstrcmpiW;
use winapi::um::winnt::{DLL_PROCESS_ATTACH, DLL_PROCESS_DETACH, HANDLE, LPCWSTR};
const NVCUDA_LONG_PATH: &[u16] = wch_c!(r"C:\WINDOWS\system32\nvcuda.dll");
const NVCUDA_SHORT_PATH: &[u16] = wch_c!("nvcuda.dll");
static mut LOAD_LIBRARY_EX: unsafe extern "system" fn(
lpLibFileName: LPCWSTR,
hFile: HANDLE,
dwFlags: DWORD,
) -> HMODULE = LoadLibraryExW;
#[allow(non_snake_case)]
#[no_mangle]
extern "system" fn DllMain(_: *const u8, _: u32, _: *const u8) -> u32 { 1 }
unsafe extern "system" fn NotCudaLoadLibraryExW(
lpLibFileName: LPCWSTR,
hFile: HANDLE,
dwFlags: DWORD,
) -> HMODULE {
let nvcuda_file_name = if lstrcmpiW(lpLibFileName, NVCUDA_LONG_PATH.as_ptr()) == 0 {
NVCUDA_SHORT_PATH.as_ptr()
} else {
lpLibFileName
};
(LOAD_LIBRARY_EX)(nvcuda_file_name, hFile, dwFlags)
}
#[allow(non_snake_case)]
#[no_mangle]
unsafe extern "system" fn DllMain(_: *const u8, dwReason: u32, _: *const u8) -> i32 {
if dwReason == DLL_PROCESS_ATTACH {
let mut load_lib_ex = LoadLibraryExW as *mut _;
DetourRestoreAfterWith();
DetourTransactionBegin();
DetourUpdateThread(GetCurrentThread());
DetourAttach(
&mut load_lib_ex,
NotCudaLoadLibraryExW as *mut _,
);
DetourTransactionCommit();
LOAD_LIBRARY_EX = std::mem::transmute(load_lib_ex);
} else if dwReason == DLL_PROCESS_DETACH {
DetourTransactionBegin();
DetourUpdateThread(GetCurrentThread());
DetourDetach(
&mut (LOAD_LIBRARY_EX as *mut _),
NotCudaLoadLibraryExW as *mut _,
);
DetourTransactionCommit();
}
TRUE
}