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|
use std::{
ffi::{c_void, CStr},
mem,
os::raw::c_ushort,
ptr,
};
use std::os::windows::io::AsRawHandle;
use wchar::wch_c;
use winapi::{
shared::minwindef::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";
include!("../../zluda_redirect/src/payload_guid.rs");
pub unsafe fn load_cuda_library(libcuda_path: &str) -> *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
};
let libcuda_path_uf16 = libcuda_path
.encode_utf16()
.chain(std::iter::once(0))
.collect::<Vec<_>>();
load_lib(libcuda_path_uf16.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_NVCUDA_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 _
}
#[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 _
}
|
