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|
use std::{
ffi::{c_void, CStr, CString, OsString},
mem,
os::raw::c_ushort,
ptr,
};
use std::os::windows::io::AsRawHandle;
use winapi::{
shared::minwindef::{FARPROC, HMODULE},
um::debugapi::OutputDebugStringA,
um::libloaderapi::{GetProcAddress, LoadLibraryW},
};
use crate::cuda::CUuuid;
pub(crate) const LIBCUDA_DEFAULT_PATH: &'static str = "C:\\Windows\\System32\\nvcuda.dll";
const LOAD_LIBRARY_NO_REDIRECT: &'static [u8] = b"ZludaLoadLibraryW_NoRedirect\0";
const GET_PROC_ADDRESS_NO_REDIRECT: &'static [u8] = b"ZludaGetProcAddress_NoRedirect\0";
lazy_static! {
static ref PLATFORM_LIBRARY: PlatformLibrary = unsafe { PlatformLibrary::new() };
}
include!("../../zluda_redirect/src/payload_guid.rs");
#[allow(non_snake_case)]
struct PlatformLibrary {
LoadLibraryW: unsafe extern "system" fn(*const u16) -> HMODULE,
GetProcAddress: unsafe extern "system" fn(hModule: HMODULE, lpProcName: *const u8) -> FARPROC,
}
impl PlatformLibrary {
#[allow(non_snake_case)]
unsafe fn new() -> Self {
let (LoadLibraryW, GetProcAddress) = match Self::get_detourer_module() {
None => (
LoadLibraryW as unsafe extern "system" fn(*const u16) -> HMODULE,
mem::transmute(
GetProcAddress
as unsafe extern "system" fn(
hModule: HMODULE,
lpProcName: *const i8,
) -> FARPROC,
),
),
Some(zluda_with) => (
mem::transmute(GetProcAddress(
zluda_with,
LOAD_LIBRARY_NO_REDIRECT.as_ptr() as _,
)),
mem::transmute(GetProcAddress(
zluda_with,
GET_PROC_ADDRESS_NO_REDIRECT.as_ptr() as _,
)),
),
};
PlatformLibrary {
LoadLibraryW,
GetProcAddress,
}
}
unsafe fn get_detourer_module() -> Option<HMODULE> {
let mut module = ptr::null_mut();
loop {
module = detours_sys::DetourEnumerateModules(module);
if module == ptr::null_mut() {
break;
}
let payload = GetProcAddress(module as _, b"ZLUDA_REDIRECT\0".as_ptr() as _);
if payload != ptr::null_mut() {
return Some(module as _);
}
}
None
}
}
pub unsafe fn load_cuda_library(libcuda_path: &str) -> *mut c_void {
let libcuda_path_uf16 = libcuda_path
.encode_utf16()
.chain(std::iter::once(0))
.collect::<Vec<_>>();
(PLATFORM_LIBRARY.LoadLibraryW)(libcuda_path_uf16.as_ptr()) as _
}
pub unsafe fn get_proc_address(handle: *mut c_void, func: &CStr) -> *mut c_void {
(PLATFORM_LIBRARY.GetProcAddress)(handle as _, func.as_ptr() as _) as _
}
#[macro_export]
macro_rules! os_log {
($format:tt) => {
{
use crate::os::__log_impl;
__log_impl(format!($format));
}
};
($format:tt, $($obj: expr),+) => {
{
use crate::os::__log_impl;
__log_impl(format!($format, $($obj,)+));
}
};
}
pub fn __log_impl(s: String) {
let log_to_stderr = std::io::stderr().as_raw_handle() != ptr::null_mut();
if log_to_stderr {
eprintln!("[ZLUDA_DUMP] {}", s);
} else {
let mut win_str = String::with_capacity("[ZLUDA_DUMP] ".len() + s.len() + 2);
win_str.push_str("[ZLUDA_DUMP] ");
win_str.push_str(&s);
win_str.push_str("\n\0");
unsafe { OutputDebugStringA(win_str.as_ptr() as *const _) };
}
}
#[cfg(target_arch = "x86")]
pub fn get_thunk(
original_fn: *const c_void,
report_fn: unsafe extern "system" fn(*const CUuuid, usize),
guid: *const CUuuid,
idx: usize,
) -> *const c_void {
use dynasmrt::{dynasm, DynasmApi};
let mut ops = dynasmrt::x86::Assembler::new().unwrap();
let start = ops.offset();
dynasm!(ops
; .arch x86
; push idx as i32
; push guid as i32
; mov eax, report_fn as i32
; call eax
; mov eax, original_fn as i32
; jmp eax
; int 3
);
let exe_buf = ops.finalize().unwrap();
let result_fn = exe_buf.ptr(start);
mem::forget(exe_buf);
result_fn as *const _
}
//RCX, RDX, R8, R9
#[cfg(target_arch = "x86_64")]
pub fn get_thunk(
original_fn: *const c_void,
report_fn: unsafe extern "system" fn(*const CUuuid, usize),
guid: *const CUuuid,
idx: usize,
) -> *const c_void {
use dynasmrt::{dynasm, DynasmApi};
let mut ops = dynasmrt::x86::Assembler::new().unwrap();
let start = ops.offset();
// Let's hope there's never more than 4 arguments
dynasm!(ops
; .arch x64
; push rbp
; mov rbp, rsp
; push rcx
; push rdx
; push r8
; push r9
; mov rcx, QWORD guid as i64
; mov rdx, QWORD idx as i64
; mov rax, QWORD report_fn as i64
; call rax
; pop r9
; pop r8
; pop rdx
; pop rcx
; mov rax, QWORD original_fn as i64
; call rax
; pop rbp
; ret
; int 3
);
let exe_buf = ops.finalize().unwrap();
let result_fn = exe_buf.ptr(start);
mem::forget(exe_buf);
result_fn as *const _
}
|
