Refactor device ConDrv handling#1027

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Merged
Weiteng Chen (CvvT) merged 2 commits into from
Jul 14, 2026
Merged

Refactor device ConDrv handling #1027

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3bc3f53
fix ConDrv device
CvvT Jul 13, 2026
e730ca9
minor fix
CvvT Jul 14, 2026
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26 changes: 26 additions & 0 deletions litebox_shim_windows/src/lib.rs
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Original file line numberDiff line numberDiff line change
Expand Up@@ -1093,6 +1093,32 @@ impl<Platform: ShimPlatform, FS: ShimFS> Task<Platform, FS> {
);
(status, ContinueOperation::Resume)
}
SyscallRequest::NtDeviceIoControlFile {
file_handle,
event,
apc_routine,
apc_context,
io_status_block,
io_control_code,
input_buffer,
input_buffer_length,
output_buffer,
output_buffer_length,
} => {
let status = self.sys_nt_device_io_control_file(
file_handle,
event,
apc_routine,
apc_context,
io_status_block,
io_control_code,
input_buffer,
input_buffer_length,
output_buffer,
output_buffer_length,
);
(status, ContinueOperation::Resume)
}
SyscallRequest::NtApphelpCacheControl {
service_class,
service_data,
Expand Down
36 changes: 17 additions & 19 deletions litebox_shim_windows/src/loader/pe.rs
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Original file line numberDiff line numberDiff line change
Expand Up@@ -35,7 +35,7 @@ use crate::syscalls::process::{INITIAL_PROCESS_ID, INITIAL_THREAD_ID};
use crate::{MutPtr, ShimFS};

const NTDLL_WRITABLE_SECTIONS: &[&[u8]] = &[b".mrdata"];
const NTDLL_PATHS: &[&str] = &["/Windows/System32/ntdll.dll", "/windows/system32/ntdll.dll"];
const NTDLL_PATH: &str = "/Windows/System32/ntdll.dll";
const RUNTIME_FUNCTION_ENTRY_SIZE: usize = 12;
const ZERO_CHUNK: [u8; PAGE_SIZE] = [0; PAGE_SIZE];
const FILE_CHUNK_BYTES: usize = 64 * 1024;
Expand DownExpand Up@@ -1038,26 +1038,24 @@ fn load_ntdll<Platform: crate::ShimPlatform, FS: crate::ShimFS>(
fs: Arc<FS>,
page_manager: &crate::WindowsPageManager<Platform>,
) -> Result<Option<LoadedNtDll>, WindowsLoadError> {
for path in NTDLL_PATHS {
match load_image_with_writable_sections(
fs.clone(),
path,
platform,
page_manager,
NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
let exports = ntdll_exports::<Platform>(&image)?;
litebox_util_log::debug!(path:% = path; "Loaded guest ntdll.dll");
return Ok(Some(LoadedNtDll { image, exports }));
}
Err(error) if is_missing_file_error(&error) => {}
Err(error) => return Err(error),
match load_image_with_writable_sections(
fs,
NTDLL_PATH,
platform,
page_manager,
NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
let exports = ntdll_exports::<Platform>(&image)?;
litebox_util_log::debug!(path:% = NTDLL_PATH; "Loaded guest ntdll.dll");
Ok(Some(LoadedNtDll { image, exports }))
}
Err(error) if is_missing_file_error(&error) => {
litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
Ok(None)
}
Err(error) => Err(error),
}

litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
Ok(None)
}

fn load_image<Platform: crate::ShimPlatform, FS: ShimFS>(
Expand Down
306 changes: 306 additions & 0 deletions litebox_shim_windows/src/syscalls/condrv.rs
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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,306 @@
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

//! Windows console driver support.

use core::mem::size_of;

use int_enum::IntEnum;
use litebox::platform::{RawConstPointer as _, RawMutPointer as _};
use litebox_common_windows::nt_status::NtStatus;
use zerocopy::{FromBytes, Immutable, IntoBytes};

use crate::nt_types::IoStatusBlock;
use crate::{ConstPtr, MutPtr};

const FILE_DEVICE_CONSOLE: u32 = 0x50;
const CD_SERVER_EA_NAME: &[u8] = b"server";

#[repr(u8)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
pub(crate) enum CondrvObject {
Input = 0,
Output = 1,
Server = 2,
Reference = 3,
Connect = 4,
}

impl CondrvObject {
pub(crate) fn from_device_name(name: &str) -> Result<Self, NtStatus> {
match Self::from_component(name) {
Some(object @ (Self::Input | Self::Output | Self::Server)) => Ok(object),
Some(Self::Reference) => Err(NtStatus::INVALID_HANDLE),
Some(Self::Connect) => Err(NtStatus::OBJECT_TYPE_MISMATCH),
None => Err(NtStatus::OBJECT_NAME_NOT_FOUND),
}
}

fn from_component(name: &str) -> Option<Self> {
if name.eq_ignore_ascii_case("Input") {
Some(Self::Input)
} else if name.eq_ignore_ascii_case("Output") {
Some(Self::Output)
} else if name.eq_ignore_ascii_case("Server") {
Some(Self::Server)
} else if name.eq_ignore_ascii_case("Reference") {
Some(Self::Reference)
} else if name.eq_ignore_ascii_case("Connect") {
Some(Self::Connect)
} else {
None
}
}

pub(crate) fn relative_child(self, name: &str) -> Result<Self, NtStatus> {
let name = name.strip_prefix('\\').ok_or(NtStatus::NOT_FOUND)?;
let child = Self::from_component(name).ok_or(NtStatus::NOT_FOUND)?;

match (self, child) {
(Self::Server, Self::Server | Self::Reference)
| (Self::Reference, Self::Server | Self::Connect | Self::Input | Self::Output)
| (Self::Input | Self::Output, Self::Server | Self::Input | Self::Output) => Ok(child),
(Self::Server, Self::Input | Self::Output) => Err(NtStatus::INVALID_DEVICE_STATE),
(Self::Reference | Self::Input | Self::Output, Self::Reference) => {
Err(NtStatus::OBJECT_TYPE_MISMATCH)
}
(Self::Server | Self::Input | Self::Output, Self::Connect) | (Self::Connect, _) => {
Err(NtStatus::INVALID_HANDLE)
}
}
}

pub(crate) fn handle_path(self) -> &'static str {
match self {
Self::Input => "/dev/stdin",
Self::Output => "/dev/stdout",
Self::Server => r"\Device\ConDrv\Server",
Self::Reference => r"\Device\ConDrv\Reference",
Self::Connect => r"\Device\ConDrv\Connect",
}
}
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum IoControlMethod {
Buffered = 0,
InDirect = 1,
OutDirect = 2,
Neither = 3,
}

bitflags::bitflags! {
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
struct IoControlAccess: u32 {
const ANY = 0;
const READ = 1;
const WRITE = 2;
const _ = !0;
}
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum ConsoleIoControlFunction {
LaunchServer = 13,
}

#[repr(C)]
#[derive(Clone, Copy, Debug, FromBytes, Immutable, IntoBytes)]
struct FileFullEaInformation {
next_entry_offset: u32,
flags: u8,
ea_name_length: u8,
ea_value_length: u16,
}

#[cfg(test)]
pub(crate) fn ea_buffer(name: &[u8], value_length: usize) -> alloc::vec::Vec<u8> {
let header = FileFullEaInformation {
next_entry_offset: 0,
flags: 0,
ea_name_length: u8::try_from(name.len()).unwrap(),
ea_value_length: u16::try_from(value_length).unwrap(),
};
let mut buffer = alloc::vec::Vec::new();
buffer.extend_from_slice(header.as_bytes());
buffer.extend_from_slice(name);
buffer.push(0);
buffer.resize(buffer.len() + value_length, 0);
buffer
}

pub(crate) fn validate_connect_server_ea<Platform: crate::ShimPlatform>(
ea_buffer: Option<ConstPtr<Platform, u8>>,
ea_length: u32,
) -> Result<(), NtStatus> {
let Some(ea_buffer) = ea_buffer else {
return Err(NtStatus::EAS_NOT_SUPPORTED);
};
let ea_length = ea_length as usize;
let Some(entry) = ConstPtr::<Platform, FileFullEaInformation>::from_usize(ea_buffer.as_usize())
.read_at_offset(0)
else {
return Err(NtStatus::ACCESS_VIOLATION);
};

let name_offset = size_of::<FileFullEaInformation>();
let name_length = entry.ea_name_length as usize;
let value_length = entry.ea_value_length as usize;
let value_offset = name_offset
.checked_add(name_length)
.and_then(|offset| offset.checked_add(1))
.ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
let entry_length = value_offset
.checked_add(value_length)
.ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
if entry_length > ea_length {
return Err(NtStatus::EAS_NOT_SUPPORTED);
}

let Some(name_address) = ea_buffer.as_usize().checked_add(name_offset) else {
return Err(NtStatus::EAS_NOT_SUPPORTED);
};
let Some(name_with_nul) =
ConstPtr::<Platform, u8>::from_usize(name_address).to_owned_slice(name_length + 1)
else {
return Err(NtStatus::ACCESS_VIOLATION);
};
let Some((&0, name)) = name_with_nul.split_last() else {
return Err(NtStatus::EAS_NOT_SUPPORTED);
};
if !name.eq_ignore_ascii_case(CD_SERVER_EA_NAME) {
return Err(NtStatus::EAS_NOT_SUPPORTED);
}

let Some(value_address) = ea_buffer.as_usize().checked_add(value_offset) else {
return Err(NtStatus::EAS_NOT_SUPPORTED);
};
// The ConDrv "server" EA value format is undocumented; probe the declared payload without
// interpreting it until its semantics are understood.
if ConstPtr::<Platform, u8>::from_usize(value_address)
.to_owned_slice(value_length)
.is_none()
{
return Err(NtStatus::ACCESS_VIOLATION);
}

Ok(())
}

pub(crate) fn handle_ioctl<Platform: crate::ShimPlatform>(
condrv_object: CondrvObject,
io_status_block: MutPtr<Platform, IoStatusBlock>,
io_control_code: u32,
input_buffer: Option<ConstPtr<Platform, u8>>,
input_buffer_length: u32,
output_buffer: Option<MutPtr<Platform, u8>>,
output_buffer_length: u32,
) -> NtStatus {
let device_type = io_control_code >> 16;
let access = IoControlAccess::from_bits_retain((io_control_code >> 14) & 0x3);
let function = (io_control_code >> 2) & 0xfff;
let method = IoControlMethod::try_from(io_control_code & 0x3);

if device_type != FILE_DEVICE_CONSOLE || method != Ok(IoControlMethod::Neither) {
litebox_util_log::debug!(
condrv_object:? = condrv_object,
io_control_code:% = format_args!("{io_control_code:#x}");
"Unsupported ConDrv IOCTL shape"
);
return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
}

let Ok(function) = ConsoleIoControlFunction::try_from(function) else {
litebox_util_log::debug!(
condrv_object:? = condrv_object,
io_control_code:% = format_args!("{io_control_code:#x}");
"Unsupported ConDrv IOCTL function"
);
return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
};

match (condrv_object, function) {
(CondrvObject::Server, ConsoleIoControlFunction::LaunchServer)
if access.is_empty()
&& input_buffer.is_some()
&& input_buffer_length != 0
&& output_buffer.is_none()
&& output_buffer_length == 0 =>
{
if input_buffer
.and_then(|input_buffer| input_buffer.read_at_offset(0))
.is_none()
{
return complete_ioctl::<Platform>(io_status_block, NtStatus::ACCESS_VIOLATION, 0);
}
complete_ioctl::<Platform>(io_status_block, NtStatus::SUCCESS, 0)
}
_ => {
litebox_util_log::debug!(
condrv_object:? = condrv_object,
function:? = function,
io_control_code:% = format_args!("{io_control_code:#x}");
"Unsupported ConDrv IOCTL for object"
);
complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0)
}
}
}

pub(crate) fn complete_ioctl<Platform: crate::ShimPlatform>(
io_status_block: MutPtr<Platform, IoStatusBlock>,
status: NtStatus,
information: usize,
) -> NtStatus {
if io_status_block
.write_at_offset(0, IoStatusBlock::new(status, information))
.is_none()
{
return NtStatus::ACCESS_VIOLATION;
}
status
}

#[cfg(test)]
mod tests {
use super::*;

#[test]
fn relative_children_match_host_parse_contexts() {
use CondrvObject::{Connect, Input, Output, Reference, Server};

for (parent, name, expected) in [
(Server, r"\Server", Ok(Server)),
(Server, r"\Reference", Ok(Reference)),
(Server, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
(Server, r"\Input", Err(NtStatus::INVALID_DEVICE_STATE)),
(Server, r"\Output", Err(NtStatus::INVALID_DEVICE_STATE)),
(Reference, r"\Server", Ok(Server)),
(Reference, r"\Connect", Ok(Connect)),
(Reference, r"\Input", Ok(Input)),
(Reference, r"\Output", Ok(Output)),
(
Reference,
r"\Reference",
Err(NtStatus::OBJECT_TYPE_MISMATCH),
),
(Input, r"\Server", Ok(Server)),
(Input, r"\Input", Ok(Input)),
(Input, r"\Output", Ok(Output)),
(Input, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
(Input, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
(Output, r"\Server", Ok(Server)),
(Output, r"\Input", Ok(Input)),
(Output, r"\Output", Ok(Output)),
(Output, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
(Output, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
] {
assert_eq!(parent.relative_child(name), expected, "{parent:?} + {name}");
}

assert_eq!(Server.relative_child("Reference"), Err(NtStatus::NOT_FOUND));
assert_eq!(Server.relative_child(r"\Missing"), Err(NtStatus::NOT_FOUND));
}
}
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Refactor device ConDrv handling#1027

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to your account

 Merged

Weiteng Chen (CvvT)
merged 2 commits into

from

Jul 14, 2026
 Merged


Refactor device ConDrv handling
#1027
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3bc3f53

fix ConDrv device


CvvT Jul 13, 2026
e730ca9

minor fix


CvvT Jul 14, 2026

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26 changes: 26 additions & 0 deletions
litebox_shim_windows/src/lib.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1093,6 +1093,32 @@ impl<Platform: ShimPlatform, FS: ShimFS> Task<Platform, FS> {
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtDeviceIoControlFile {
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 } => {
 let status = self.sys_nt_device_io_control_file(
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtApphelpCacheControl {
 service_class,
 service_data,
Expand Down

36 changes: 17 additions & 19 deletions
litebox_shim_windows/src/loader/pe.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -35,7 +35,7 @@ use crate::syscalls::process::{INITIAL_PROCESS_ID, INITIAL_THREAD_ID};
use crate::{MutPtr, ShimFS};

const NTDLL_WRITABLE_SECTIONS: &[&[u8]] = &[b".mrdata"];
const NTDLL_PATHS: &[&str] = &["/Windows/System32/ntdll.dll", "/windows/system32/ntdll.dll"];
const NTDLL_PATH: &str = "/Windows/System32/ntdll.dll";
const RUNTIME_FUNCTION_ENTRY_SIZE: usize = 12;
const ZERO_CHUNK: [u8; PAGE_SIZE] = [0; PAGE_SIZE];
const FILE_CHUNK_BYTES: usize = 64 * 1024;
Expand DownExpand Up@@ -1038,26 +1038,24 @@ fn load_ntdll<Platform: crate::ShimPlatform, FS: crate::ShimFS>(
 fs: Arc<FS>,
 page_manager: &crate::WindowsPageManager<Platform>,
) -> Result<Option<LoadedNtDll>, WindowsLoadError> {
for path in NTDLL_PATHS {
match load_image_with_writable_sections(
 fs.clone(),
 path,
 platform,
 page_manager,
 NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
 let exports = ntdll_exports::<Platform>(&image)?;
 litebox_util_log::debug!(path:% = path; "Loaded guest ntdll.dll");
 return Ok(Some(LoadedNtDll { image, exports }));
 }
Err(error) if is_missing_file_error(&error) => {}
Err(error) => return Err(error),
match load_image_with_writable_sections(
fs,
NTDLL_PATH,
platform,
page_manager,
NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
let exports = ntdll_exports::<Platform>(&image)?;
litebox_util_log::debug!(path:% = NTDLL_PATH; "Loaded guest ntdll.dll");
Ok(Some(LoadedNtDll { image, exports }))
}
Err(error) if is_missing_file_error(&error) => {
litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
Ok(None)
 }
 Err(error) => Err(error),
 }

 litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
 Ok(None)
}

fn load_image<Platform: crate::ShimPlatform, FS: ShimFS>(
Expand Down

306 changes: 306 additions & 0 deletions
litebox_shim_windows/src/syscalls/condrv.rs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,306 @@
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

//! Windows console driver support.

use core::mem::size_of;

use int_enum::IntEnum;
use litebox::platform::{RawConstPointer as _, RawMutPointer as _};
use litebox_common_windows::nt_status::NtStatus;
use zerocopy::{FromBytes, Immutable, IntoBytes};

use crate::nt_types::IoStatusBlock;
use crate::{ConstPtr, MutPtr};

const FILE_DEVICE_CONSOLE: u32 = 0x50;
const CD_SERVER_EA_NAME: &[u8] = b"server";

#[repr(u8)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
pub(crate) enum CondrvObject {
 Input = 0,
 Output = 1,
 Server = 2,
 Reference = 3,
 Connect = 4,
}

impl CondrvObject {
 pub(crate) fn from_device_name(name: &str) -> Result<Self, NtStatus> {
 match Self::from_component(name) {
 Some(object @ (Self::Input | Self::Output | Self::Server)) => Ok(object),
 Some(Self::Reference) => Err(NtStatus::INVALID_HANDLE),
 Some(Self::Connect) => Err(NtStatus::OBJECT_TYPE_MISMATCH),
 None => Err(NtStatus::OBJECT_NAME_NOT_FOUND),
 }
 }

 fn from_component(name: &str) -> Option<Self> {
 if name.eq_ignore_ascii_case("Input") {
 Some(Self::Input)
 } else if name.eq_ignore_ascii_case("Output") {
 Some(Self::Output)
 } else if name.eq_ignore_ascii_case("Server") {
 Some(Self::Server)
 } else if name.eq_ignore_ascii_case("Reference") {
 Some(Self::Reference)
 } else if name.eq_ignore_ascii_case("Connect") {
 Some(Self::Connect)
 } else {
 None
 }
 }

 pub(crate) fn relative_child(self, name: &str) -> Result<Self, NtStatus> {
 let name = name.strip_prefix('\\').ok_or(NtStatus::NOT_FOUND)?;
 let child = Self::from_component(name).ok_or(NtStatus::NOT_FOUND)?;

 match (self, child) {
 (Self::Server, Self::Server | Self::Reference)
 | (Self::Reference, Self::Server | Self::Connect | Self::Input | Self::Output)
 | (Self::Input | Self::Output, Self::Server | Self::Input | Self::Output) => Ok(child),
 (Self::Server, Self::Input | Self::Output) => Err(NtStatus::INVALID_DEVICE_STATE),
 (Self::Reference | Self::Input | Self::Output, Self::Reference) => {
 Err(NtStatus::OBJECT_TYPE_MISMATCH)
 }
 (Self::Server | Self::Input | Self::Output, Self::Connect) | (Self::Connect, _) => {
 Err(NtStatus::INVALID_HANDLE)
 }
 }
 }

 pub(crate) fn handle_path(self) -> &'static str {
 match self {
 Self::Input => "/dev/stdin",
 Self::Output => "/dev/stdout",
 Self::Server => r"\Device\ConDrv\Server",
 Self::Reference => r"\Device\ConDrv\Reference",
 Self::Connect => r"\Device\ConDrv\Connect",
 }
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum IoControlMethod {
 Buffered = 0,
 InDirect = 1,
 OutDirect = 2,
 Neither = 3,
}

bitflags::bitflags! {
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 struct IoControlAccess: u32 {
 const ANY = 0;
 const READ = 1;
 const WRITE = 2;
 const _ = !0;
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum ConsoleIoControlFunction {
 LaunchServer = 13,
}

#[repr(C)]
#[derive(Clone, Copy, Debug, FromBytes, Immutable, IntoBytes)]
struct FileFullEaInformation {
 next_entry_offset: u32,
 flags: u8,
 ea_name_length: u8,
 ea_value_length: u16,
}

#[cfg(test)]
pub(crate) fn ea_buffer(name: &[u8], value_length: usize) -> alloc::vec::Vec<u8> {
 let header = FileFullEaInformation {
 next_entry_offset: 0,
 flags: 0,
 ea_name_length: u8::try_from(name.len()).unwrap(),
 ea_value_length: u16::try_from(value_length).unwrap(),
 };
 let mut buffer = alloc::vec::Vec::new();
 buffer.extend_from_slice(header.as_bytes());
 buffer.extend_from_slice(name);
 buffer.push(0);
 buffer.resize(buffer.len() + value_length, 0);
 buffer
}

pub(crate) fn validate_connect_server_ea<Platform: crate::ShimPlatform>(
 ea_buffer: Option<ConstPtr<Platform, u8>>,
 ea_length: u32,
) -> Result<(), NtStatus> {
 let Some(ea_buffer) = ea_buffer else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let ea_length = ea_length as usize;
 let Some(entry) = ConstPtr::<Platform, FileFullEaInformation>::from_usize(ea_buffer.as_usize())
 .read_at_offset(0)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };

 let name_offset = size_of::<FileFullEaInformation>();
 let name_length = entry.ea_name_length as usize;
 let value_length = entry.ea_value_length as usize;
 let value_offset = name_offset
 .checked_add(name_length)
 .and_then(|offset| offset.checked_add(1))
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 let entry_length = value_offset
 .checked_add(value_length)
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 if entry_length > ea_length {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(name_address) = ea_buffer.as_usize().checked_add(name_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let Some(name_with_nul) =
 ConstPtr::<Platform, u8>::from_usize(name_address).to_owned_slice(name_length + 1)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };
 let Some((&0, name)) = name_with_nul.split_last() else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 if !name.eq_ignore_ascii_case(CD_SERVER_EA_NAME) {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(value_address) = ea_buffer.as_usize().checked_add(value_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 // The ConDrv "server" EA value format is undocumented; probe the declared payload without
 // interpreting it until its semantics are understood.
 if ConstPtr::<Platform, u8>::from_usize(value_address)
 .to_owned_slice(value_length)
 .is_none()
 {
 return Err(NtStatus::ACCESS_VIOLATION);
 }

 Ok(())
}

pub(crate) fn handle_ioctl<Platform: crate::ShimPlatform>(
 condrv_object: CondrvObject,
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 io_control_code: u32,
 input_buffer: Option<ConstPtr<Platform, u8>>,
 input_buffer_length: u32,
 output_buffer: Option<MutPtr<Platform, u8>>,
 output_buffer_length: u32,
) -> NtStatus {
 let device_type = io_control_code >> 16;
 let access = IoControlAccess::from_bits_retain((io_control_code >> 14) & 0x3);
 let function = (io_control_code >> 2) & 0xfff;
 let method = IoControlMethod::try_from(io_control_code & 0x3);

 if device_type != FILE_DEVICE_CONSOLE || method != Ok(IoControlMethod::Neither) {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL shape"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 }

 let Ok(function) = ConsoleIoControlFunction::try_from(function) else {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL function"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 };

 match (condrv_object, function) {
 (CondrvObject::Server, ConsoleIoControlFunction::LaunchServer)
 if access.is_empty()
 && input_buffer.is_some()
 && input_buffer_length != 0
 && output_buffer.is_none()
 && output_buffer_length == 0 =>
 {
 if input_buffer
 .and_then(|input_buffer| input_buffer.read_at_offset(0))
 .is_none()
 {
 return complete_ioctl::<Platform>(io_status_block, NtStatus::ACCESS_VIOLATION, 0);
 }
 complete_ioctl::<Platform>(io_status_block, NtStatus::SUCCESS, 0)
 }
 _ => {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 function:? = function,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL for object"
 );
 complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0)
 }
 }
}

pub(crate) fn complete_ioctl<Platform: crate::ShimPlatform>(
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 status: NtStatus,
 information: usize,
) -> NtStatus {
 if io_status_block
 .write_at_offset(0, IoStatusBlock::new(status, information))
 .is_none()
 {
 return NtStatus::ACCESS_VIOLATION;
 }
 status
}

#[cfg(test)]
mod tests {
 use super::*;

 #[test]
 fn relative_children_match_host_parse_contexts() {
 use CondrvObject::{Connect, Input, Output, Reference, Server};

 for (parent, name, expected) in [
 (Server, r"\Server", Ok(Server)),
 (Server, r"\Reference", Ok(Reference)),
 (Server, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Server, r"\Input", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Server, r"\Output", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Reference, r"\Server", Ok(Server)),
 (Reference, r"\Connect", Ok(Connect)),
 (Reference, r"\Input", Ok(Input)),
 (Reference, r"\Output", Ok(Output)),
 (
 Reference,
 r"\Reference",
 Err(NtStatus::OBJECT_TYPE_MISMATCH),
 ),
 (Input, r"\Server", Ok(Server)),
 (Input, r"\Input", Ok(Input)),
 (Input, r"\Output", Ok(Output)),
 (Input, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Input, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Output, r"\Server", Ok(Server)),
 (Output, r"\Input", Ok(Input)),
 (Output, r"\Output", Ok(Output)),
 (Output, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Output, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 ] {
 assert_eq!(parent.relative_child(name), expected, "{parent:?} + {name}");
 }

 assert_eq!(Server.relative_child("Reference"), Err(NtStatus::NOT_FOUND));
 assert_eq!(Server.relative_child(r"\Missing"), Err(NtStatus::NOT_FOUND));
 }
}
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Refactor device ConDrv handling#1027

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 Merged

Weiteng Chen (CvvT)
merged 2 commits into

from

Jul 14, 2026
 Merged


Refactor device ConDrv handling
#1027
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3bc3f53

fix ConDrv device


CvvT Jul 13, 2026
e730ca9

minor fix


CvvT Jul 14, 2026

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26 changes: 26 additions & 0 deletions
litebox_shim_windows/src/lib.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1093,6 +1093,32 @@ impl<Platform: ShimPlatform, FS: ShimFS> Task<Platform, FS> {
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtDeviceIoControlFile {
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 } => {
 let status = self.sys_nt_device_io_control_file(
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtApphelpCacheControl {
 service_class,
 service_data,
Expand Down

36 changes: 17 additions & 19 deletions
litebox_shim_windows/src/loader/pe.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -35,7 +35,7 @@ use crate::syscalls::process::{INITIAL_PROCESS_ID, INITIAL_THREAD_ID};
use crate::{MutPtr, ShimFS};

const NTDLL_WRITABLE_SECTIONS: &[&[u8]] = &[b".mrdata"];
const NTDLL_PATHS: &[&str] = &["/Windows/System32/ntdll.dll", "/windows/system32/ntdll.dll"];
const NTDLL_PATH: &str = "/Windows/System32/ntdll.dll";
const RUNTIME_FUNCTION_ENTRY_SIZE: usize = 12;
const ZERO_CHUNK: [u8; PAGE_SIZE] = [0; PAGE_SIZE];
const FILE_CHUNK_BYTES: usize = 64 * 1024;
Expand DownExpand Up@@ -1038,26 +1038,24 @@ fn load_ntdll<Platform: crate::ShimPlatform, FS: crate::ShimFS>(
 fs: Arc<FS>,
 page_manager: &crate::WindowsPageManager<Platform>,
) -> Result<Option<LoadedNtDll>, WindowsLoadError> {
for path in NTDLL_PATHS {
match load_image_with_writable_sections(
 fs.clone(),
 path,
 platform,
 page_manager,
 NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
 let exports = ntdll_exports::<Platform>(&image)?;
 litebox_util_log::debug!(path:% = path; "Loaded guest ntdll.dll");
 return Ok(Some(LoadedNtDll { image, exports }));
 }
Err(error) if is_missing_file_error(&error) => {}
Err(error) => return Err(error),
match load_image_with_writable_sections(
fs,
NTDLL_PATH,
platform,
page_manager,
NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
let exports = ntdll_exports::<Platform>(&image)?;
litebox_util_log::debug!(path:% = NTDLL_PATH; "Loaded guest ntdll.dll");
Ok(Some(LoadedNtDll { image, exports }))
}
Err(error) if is_missing_file_error(&error) => {
litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
Ok(None)
 }
 Err(error) => Err(error),
 }

 litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
 Ok(None)
}

fn load_image<Platform: crate::ShimPlatform, FS: ShimFS>(
Expand Down

306 changes: 306 additions & 0 deletions
litebox_shim_windows/src/syscalls/condrv.rs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,306 @@
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

//! Windows console driver support.

use core::mem::size_of;

use int_enum::IntEnum;
use litebox::platform::{RawConstPointer as _, RawMutPointer as _};
use litebox_common_windows::nt_status::NtStatus;
use zerocopy::{FromBytes, Immutable, IntoBytes};

use crate::nt_types::IoStatusBlock;
use crate::{ConstPtr, MutPtr};

const FILE_DEVICE_CONSOLE: u32 = 0x50;
const CD_SERVER_EA_NAME: &[u8] = b"server";

#[repr(u8)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
pub(crate) enum CondrvObject {
 Input = 0,
 Output = 1,
 Server = 2,
 Reference = 3,
 Connect = 4,
}

impl CondrvObject {
 pub(crate) fn from_device_name(name: &str) -> Result<Self, NtStatus> {
 match Self::from_component(name) {
 Some(object @ (Self::Input | Self::Output | Self::Server)) => Ok(object),
 Some(Self::Reference) => Err(NtStatus::INVALID_HANDLE),
 Some(Self::Connect) => Err(NtStatus::OBJECT_TYPE_MISMATCH),
 None => Err(NtStatus::OBJECT_NAME_NOT_FOUND),
 }
 }

 fn from_component(name: &str) -> Option<Self> {
 if name.eq_ignore_ascii_case("Input") {
 Some(Self::Input)
 } else if name.eq_ignore_ascii_case("Output") {
 Some(Self::Output)
 } else if name.eq_ignore_ascii_case("Server") {
 Some(Self::Server)
 } else if name.eq_ignore_ascii_case("Reference") {
 Some(Self::Reference)
 } else if name.eq_ignore_ascii_case("Connect") {
 Some(Self::Connect)
 } else {
 None
 }
 }

 pub(crate) fn relative_child(self, name: &str) -> Result<Self, NtStatus> {
 let name = name.strip_prefix('\\').ok_or(NtStatus::NOT_FOUND)?;
 let child = Self::from_component(name).ok_or(NtStatus::NOT_FOUND)?;

 match (self, child) {
 (Self::Server, Self::Server | Self::Reference)
 | (Self::Reference, Self::Server | Self::Connect | Self::Input | Self::Output)
 | (Self::Input | Self::Output, Self::Server | Self::Input | Self::Output) => Ok(child),
 (Self::Server, Self::Input | Self::Output) => Err(NtStatus::INVALID_DEVICE_STATE),
 (Self::Reference | Self::Input | Self::Output, Self::Reference) => {
 Err(NtStatus::OBJECT_TYPE_MISMATCH)
 }
 (Self::Server | Self::Input | Self::Output, Self::Connect) | (Self::Connect, _) => {
 Err(NtStatus::INVALID_HANDLE)
 }
 }
 }

 pub(crate) fn handle_path(self) -> &'static str {
 match self {
 Self::Input => "/dev/stdin",
 Self::Output => "/dev/stdout",
 Self::Server => r"\Device\ConDrv\Server",
 Self::Reference => r"\Device\ConDrv\Reference",
 Self::Connect => r"\Device\ConDrv\Connect",
 }
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum IoControlMethod {
 Buffered = 0,
 InDirect = 1,
 OutDirect = 2,
 Neither = 3,
}

bitflags::bitflags! {
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 struct IoControlAccess: u32 {
 const ANY = 0;
 const READ = 1;
 const WRITE = 2;
 const _ = !0;
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum ConsoleIoControlFunction {
 LaunchServer = 13,
}

#[repr(C)]
#[derive(Clone, Copy, Debug, FromBytes, Immutable, IntoBytes)]
struct FileFullEaInformation {
 next_entry_offset: u32,
 flags: u8,
 ea_name_length: u8,
 ea_value_length: u16,
}

#[cfg(test)]
pub(crate) fn ea_buffer(name: &[u8], value_length: usize) -> alloc::vec::Vec<u8> {
 let header = FileFullEaInformation {
 next_entry_offset: 0,
 flags: 0,
 ea_name_length: u8::try_from(name.len()).unwrap(),
 ea_value_length: u16::try_from(value_length).unwrap(),
 };
 let mut buffer = alloc::vec::Vec::new();
 buffer.extend_from_slice(header.as_bytes());
 buffer.extend_from_slice(name);
 buffer.push(0);
 buffer.resize(buffer.len() + value_length, 0);
 buffer
}

pub(crate) fn validate_connect_server_ea<Platform: crate::ShimPlatform>(
 ea_buffer: Option<ConstPtr<Platform, u8>>,
 ea_length: u32,
) -> Result<(), NtStatus> {
 let Some(ea_buffer) = ea_buffer else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let ea_length = ea_length as usize;
 let Some(entry) = ConstPtr::<Platform, FileFullEaInformation>::from_usize(ea_buffer.as_usize())
 .read_at_offset(0)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };

 let name_offset = size_of::<FileFullEaInformation>();
 let name_length = entry.ea_name_length as usize;
 let value_length = entry.ea_value_length as usize;
 let value_offset = name_offset
 .checked_add(name_length)
 .and_then(|offset| offset.checked_add(1))
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 let entry_length = value_offset
 .checked_add(value_length)
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 if entry_length > ea_length {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(name_address) = ea_buffer.as_usize().checked_add(name_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let Some(name_with_nul) =
 ConstPtr::<Platform, u8>::from_usize(name_address).to_owned_slice(name_length + 1)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };
 let Some((&0, name)) = name_with_nul.split_last() else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 if !name.eq_ignore_ascii_case(CD_SERVER_EA_NAME) {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(value_address) = ea_buffer.as_usize().checked_add(value_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 // The ConDrv "server" EA value format is undocumented; probe the declared payload without
 // interpreting it until its semantics are understood.
 if ConstPtr::<Platform, u8>::from_usize(value_address)
 .to_owned_slice(value_length)
 .is_none()
 {
 return Err(NtStatus::ACCESS_VIOLATION);
 }

 Ok(())
}

pub(crate) fn handle_ioctl<Platform: crate::ShimPlatform>(
 condrv_object: CondrvObject,
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 io_control_code: u32,
 input_buffer: Option<ConstPtr<Platform, u8>>,
 input_buffer_length: u32,
 output_buffer: Option<MutPtr<Platform, u8>>,
 output_buffer_length: u32,
) -> NtStatus {
 let device_type = io_control_code >> 16;
 let access = IoControlAccess::from_bits_retain((io_control_code >> 14) & 0x3);
 let function = (io_control_code >> 2) & 0xfff;
 let method = IoControlMethod::try_from(io_control_code & 0x3);

 if device_type != FILE_DEVICE_CONSOLE || method != Ok(IoControlMethod::Neither) {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL shape"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 }

 let Ok(function) = ConsoleIoControlFunction::try_from(function) else {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL function"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 };

 match (condrv_object, function) {
 (CondrvObject::Server, ConsoleIoControlFunction::LaunchServer)
 if access.is_empty()
 && input_buffer.is_some()
 && input_buffer_length != 0
 && output_buffer.is_none()
 && output_buffer_length == 0 =>
 {
 if input_buffer
 .and_then(|input_buffer| input_buffer.read_at_offset(0))
 .is_none()
 {
 return complete_ioctl::<Platform>(io_status_block, NtStatus::ACCESS_VIOLATION, 0);
 }
 complete_ioctl::<Platform>(io_status_block, NtStatus::SUCCESS, 0)
 }
 _ => {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 function:? = function,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL for object"
 );
 complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0)
 }
 }
}

pub(crate) fn complete_ioctl<Platform: crate::ShimPlatform>(
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 status: NtStatus,
 information: usize,
) -> NtStatus {
 if io_status_block
 .write_at_offset(0, IoStatusBlock::new(status, information))
 .is_none()
 {
 return NtStatus::ACCESS_VIOLATION;
 }
 status
}

#[cfg(test)]
mod tests {
 use super::*;

 #[test]
 fn relative_children_match_host_parse_contexts() {
 use CondrvObject::{Connect, Input, Output, Reference, Server};

 for (parent, name, expected) in [
 (Server, r"\Server", Ok(Server)),
 (Server, r"\Reference", Ok(Reference)),
 (Server, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Server, r"\Input", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Server, r"\Output", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Reference, r"\Server", Ok(Server)),
 (Reference, r"\Connect", Ok(Connect)),
 (Reference, r"\Input", Ok(Input)),
 (Reference, r"\Output", Ok(Output)),
 (
 Reference,
 r"\Reference",
 Err(NtStatus::OBJECT_TYPE_MISMATCH),
 ),
 (Input, r"\Server", Ok(Server)),
 (Input, r"\Input", Ok(Input)),
 (Input, r"\Output", Ok(Output)),
 (Input, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Input, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Output, r"\Server", Ok(Server)),
 (Output, r"\Input", Ok(Input)),
 (Output, r"\Output", Ok(Output)),
 (Output, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Output, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 ] {
 assert_eq!(parent.relative_child(name), expected, "{parent:?} + {name}");
 }

 assert_eq!(Server.relative_child("Reference"), Err(NtStatus::NOT_FOUND));
 assert_eq!(Server.relative_child(r"\Missing"), Err(NtStatus::NOT_FOUND));
 }
}
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Refactor device ConDrv handling#1027

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 Merged

Weiteng Chen (CvvT)
merged 2 commits into

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Jul 14, 2026
 Merged


Refactor device ConDrv handling
#1027
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3bc3f53

fix ConDrv device


CvvT Jul 13, 2026
e730ca9

minor fix


CvvT Jul 14, 2026

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26 changes: 26 additions & 0 deletions
litebox_shim_windows/src/lib.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1093,6 +1093,32 @@ impl<Platform: ShimPlatform, FS: ShimFS> Task<Platform, FS> {
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtDeviceIoControlFile {
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 } => {
 let status = self.sys_nt_device_io_control_file(
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtApphelpCacheControl {
 service_class,
 service_data,
Expand Down

36 changes: 17 additions & 19 deletions
litebox_shim_windows/src/loader/pe.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -35,7 +35,7 @@ use crate::syscalls::process::{INITIAL_PROCESS_ID, INITIAL_THREAD_ID};
use crate::{MutPtr, ShimFS};

const NTDLL_WRITABLE_SECTIONS: &[&[u8]] = &[b".mrdata"];
const NTDLL_PATHS: &[&str] = &["/Windows/System32/ntdll.dll", "/windows/system32/ntdll.dll"];
const NTDLL_PATH: &str = "/Windows/System32/ntdll.dll";
const RUNTIME_FUNCTION_ENTRY_SIZE: usize = 12;
const ZERO_CHUNK: [u8; PAGE_SIZE] = [0; PAGE_SIZE];
const FILE_CHUNK_BYTES: usize = 64 * 1024;
Expand DownExpand Up@@ -1038,26 +1038,24 @@ fn load_ntdll<Platform: crate::ShimPlatform, FS: crate::ShimFS>(
 fs: Arc<FS>,
 page_manager: &crate::WindowsPageManager<Platform>,
) -> Result<Option<LoadedNtDll>, WindowsLoadError> {
for path in NTDLL_PATHS {
match load_image_with_writable_sections(
 fs.clone(),
 path,
 platform,
 page_manager,
 NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
 let exports = ntdll_exports::<Platform>(&image)?;
 litebox_util_log::debug!(path:% = path; "Loaded guest ntdll.dll");
 return Ok(Some(LoadedNtDll { image, exports }));
 }
Err(error) if is_missing_file_error(&error) => {}
Err(error) => return Err(error),
match load_image_with_writable_sections(
fs,
NTDLL_PATH,
platform,
page_manager,
NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
let exports = ntdll_exports::<Platform>(&image)?;
litebox_util_log::debug!(path:% = NTDLL_PATH; "Loaded guest ntdll.dll");
Ok(Some(LoadedNtDll { image, exports }))
}
Err(error) if is_missing_file_error(&error) => {
litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
Ok(None)
 }
 Err(error) => Err(error),
 }

 litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
 Ok(None)
}

fn load_image<Platform: crate::ShimPlatform, FS: ShimFS>(
Expand Down

306 changes: 306 additions & 0 deletions
litebox_shim_windows/src/syscalls/condrv.rs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,306 @@
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

//! Windows console driver support.

use core::mem::size_of;

use int_enum::IntEnum;
use litebox::platform::{RawConstPointer as _, RawMutPointer as _};
use litebox_common_windows::nt_status::NtStatus;
use zerocopy::{FromBytes, Immutable, IntoBytes};

use crate::nt_types::IoStatusBlock;
use crate::{ConstPtr, MutPtr};

const FILE_DEVICE_CONSOLE: u32 = 0x50;
const CD_SERVER_EA_NAME: &[u8] = b"server";

#[repr(u8)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
pub(crate) enum CondrvObject {
 Input = 0,
 Output = 1,
 Server = 2,
 Reference = 3,
 Connect = 4,
}

impl CondrvObject {
 pub(crate) fn from_device_name(name: &str) -> Result<Self, NtStatus> {
 match Self::from_component(name) {
 Some(object @ (Self::Input | Self::Output | Self::Server)) => Ok(object),
 Some(Self::Reference) => Err(NtStatus::INVALID_HANDLE),
 Some(Self::Connect) => Err(NtStatus::OBJECT_TYPE_MISMATCH),
 None => Err(NtStatus::OBJECT_NAME_NOT_FOUND),
 }
 }

 fn from_component(name: &str) -> Option<Self> {
 if name.eq_ignore_ascii_case("Input") {
 Some(Self::Input)
 } else if name.eq_ignore_ascii_case("Output") {
 Some(Self::Output)
 } else if name.eq_ignore_ascii_case("Server") {
 Some(Self::Server)
 } else if name.eq_ignore_ascii_case("Reference") {
 Some(Self::Reference)
 } else if name.eq_ignore_ascii_case("Connect") {
 Some(Self::Connect)
 } else {
 None
 }
 }

 pub(crate) fn relative_child(self, name: &str) -> Result<Self, NtStatus> {
 let name = name.strip_prefix('\\').ok_or(NtStatus::NOT_FOUND)?;
 let child = Self::from_component(name).ok_or(NtStatus::NOT_FOUND)?;

 match (self, child) {
 (Self::Server, Self::Server | Self::Reference)
 | (Self::Reference, Self::Server | Self::Connect | Self::Input | Self::Output)
 | (Self::Input | Self::Output, Self::Server | Self::Input | Self::Output) => Ok(child),
 (Self::Server, Self::Input | Self::Output) => Err(NtStatus::INVALID_DEVICE_STATE),
 (Self::Reference | Self::Input | Self::Output, Self::Reference) => {
 Err(NtStatus::OBJECT_TYPE_MISMATCH)
 }
 (Self::Server | Self::Input | Self::Output, Self::Connect) | (Self::Connect, _) => {
 Err(NtStatus::INVALID_HANDLE)
 }
 }
 }

 pub(crate) fn handle_path(self) -> &'static str {
 match self {
 Self::Input => "/dev/stdin",
 Self::Output => "/dev/stdout",
 Self::Server => r"\Device\ConDrv\Server",
 Self::Reference => r"\Device\ConDrv\Reference",
 Self::Connect => r"\Device\ConDrv\Connect",
 }
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum IoControlMethod {
 Buffered = 0,
 InDirect = 1,
 OutDirect = 2,
 Neither = 3,
}

bitflags::bitflags! {
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 struct IoControlAccess: u32 {
 const ANY = 0;
 const READ = 1;
 const WRITE = 2;
 const _ = !0;
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum ConsoleIoControlFunction {
 LaunchServer = 13,
}

#[repr(C)]
#[derive(Clone, Copy, Debug, FromBytes, Immutable, IntoBytes)]
struct FileFullEaInformation {
 next_entry_offset: u32,
 flags: u8,
 ea_name_length: u8,
 ea_value_length: u16,
}

#[cfg(test)]
pub(crate) fn ea_buffer(name: &[u8], value_length: usize) -> alloc::vec::Vec<u8> {
 let header = FileFullEaInformation {
 next_entry_offset: 0,
 flags: 0,
 ea_name_length: u8::try_from(name.len()).unwrap(),
 ea_value_length: u16::try_from(value_length).unwrap(),
 };
 let mut buffer = alloc::vec::Vec::new();
 buffer.extend_from_slice(header.as_bytes());
 buffer.extend_from_slice(name);
 buffer.push(0);
 buffer.resize(buffer.len() + value_length, 0);
 buffer
}

pub(crate) fn validate_connect_server_ea<Platform: crate::ShimPlatform>(
 ea_buffer: Option<ConstPtr<Platform, u8>>,
 ea_length: u32,
) -> Result<(), NtStatus> {
 let Some(ea_buffer) = ea_buffer else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let ea_length = ea_length as usize;
 let Some(entry) = ConstPtr::<Platform, FileFullEaInformation>::from_usize(ea_buffer.as_usize())
 .read_at_offset(0)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };

 let name_offset = size_of::<FileFullEaInformation>();
 let name_length = entry.ea_name_length as usize;
 let value_length = entry.ea_value_length as usize;
 let value_offset = name_offset
 .checked_add(name_length)
 .and_then(|offset| offset.checked_add(1))
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 let entry_length = value_offset
 .checked_add(value_length)
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 if entry_length > ea_length {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(name_address) = ea_buffer.as_usize().checked_add(name_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let Some(name_with_nul) =
 ConstPtr::<Platform, u8>::from_usize(name_address).to_owned_slice(name_length + 1)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };
 let Some((&0, name)) = name_with_nul.split_last() else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 if !name.eq_ignore_ascii_case(CD_SERVER_EA_NAME) {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(value_address) = ea_buffer.as_usize().checked_add(value_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 // The ConDrv "server" EA value format is undocumented; probe the declared payload without
 // interpreting it until its semantics are understood.
 if ConstPtr::<Platform, u8>::from_usize(value_address)
 .to_owned_slice(value_length)
 .is_none()
 {
 return Err(NtStatus::ACCESS_VIOLATION);
 }

 Ok(())
}

pub(crate) fn handle_ioctl<Platform: crate::ShimPlatform>(
 condrv_object: CondrvObject,
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 io_control_code: u32,
 input_buffer: Option<ConstPtr<Platform, u8>>,
 input_buffer_length: u32,
 output_buffer: Option<MutPtr<Platform, u8>>,
 output_buffer_length: u32,
) -> NtStatus {
 let device_type = io_control_code >> 16;
 let access = IoControlAccess::from_bits_retain((io_control_code >> 14) & 0x3);
 let function = (io_control_code >> 2) & 0xfff;
 let method = IoControlMethod::try_from(io_control_code & 0x3);

 if device_type != FILE_DEVICE_CONSOLE || method != Ok(IoControlMethod::Neither) {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL shape"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 }

 let Ok(function) = ConsoleIoControlFunction::try_from(function) else {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL function"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 };

 match (condrv_object, function) {
 (CondrvObject::Server, ConsoleIoControlFunction::LaunchServer)
 if access.is_empty()
 && input_buffer.is_some()
 && input_buffer_length != 0
 && output_buffer.is_none()
 && output_buffer_length == 0 =>
 {
 if input_buffer
 .and_then(|input_buffer| input_buffer.read_at_offset(0))
 .is_none()
 {
 return complete_ioctl::<Platform>(io_status_block, NtStatus::ACCESS_VIOLATION, 0);
 }
 complete_ioctl::<Platform>(io_status_block, NtStatus::SUCCESS, 0)
 }
 _ => {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 function:? = function,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL for object"
 );
 complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0)
 }
 }
}

pub(crate) fn complete_ioctl<Platform: crate::ShimPlatform>(
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 status: NtStatus,
 information: usize,
) -> NtStatus {
 if io_status_block
 .write_at_offset(0, IoStatusBlock::new(status, information))
 .is_none()
 {
 return NtStatus::ACCESS_VIOLATION;
 }
 status
}

#[cfg(test)]
mod tests {
 use super::*;

 #[test]
 fn relative_children_match_host_parse_contexts() {
 use CondrvObject::{Connect, Input, Output, Reference, Server};

 for (parent, name, expected) in [
 (Server, r"\Server", Ok(Server)),
 (Server, r"\Reference", Ok(Reference)),
 (Server, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Server, r"\Input", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Server, r"\Output", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Reference, r"\Server", Ok(Server)),
 (Reference, r"\Connect", Ok(Connect)),
 (Reference, r"\Input", Ok(Input)),
 (Reference, r"\Output", Ok(Output)),
 (
 Reference,
 r"\Reference",
 Err(NtStatus::OBJECT_TYPE_MISMATCH),
 ),
 (Input, r"\Server", Ok(Server)),
 (Input, r"\Input", Ok(Input)),
 (Input, r"\Output", Ok(Output)),
 (Input, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Input, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Output, r"\Server", Ok(Server)),
 (Output, r"\Input", Ok(Input)),
 (Output, r"\Output", Ok(Output)),
 (Output, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Output, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 ] {
 assert_eq!(parent.relative_child(name), expected, "{parent:?} + {name}");
 }

 assert_eq!(Server.relative_child("Reference"), Err(NtStatus::NOT_FOUND));
 assert_eq!(Server.relative_child(r"\Missing"), Err(NtStatus::NOT_FOUND));
 }
}
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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Refactor device ConDrv handling#1027

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 Merged

Weiteng Chen (CvvT)
merged 2 commits into

from

Jul 14, 2026
 Merged


Refactor device ConDrv handling
#1027
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3bc3f53

fix ConDrv device


CvvT Jul 13, 2026
e730ca9

minor fix


CvvT Jul 14, 2026

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26 changes: 26 additions & 0 deletions
litebox_shim_windows/src/lib.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1093,6 +1093,32 @@ impl<Platform: ShimPlatform, FS: ShimFS> Task<Platform, FS> {
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtDeviceIoControlFile {
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 } => {
 let status = self.sys_nt_device_io_control_file(
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtApphelpCacheControl {
 service_class,
 service_data,
Expand Down

36 changes: 17 additions & 19 deletions
litebox_shim_windows/src/loader/pe.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -35,7 +35,7 @@ use crate::syscalls::process::{INITIAL_PROCESS_ID, INITIAL_THREAD_ID};
use crate::{MutPtr, ShimFS};

const NTDLL_WRITABLE_SECTIONS: &[&[u8]] = &[b".mrdata"];
const NTDLL_PATHS: &[&str] = &["/Windows/System32/ntdll.dll", "/windows/system32/ntdll.dll"];
const NTDLL_PATH: &str = "/Windows/System32/ntdll.dll";
const RUNTIME_FUNCTION_ENTRY_SIZE: usize = 12;
const ZERO_CHUNK: [u8; PAGE_SIZE] = [0; PAGE_SIZE];
const FILE_CHUNK_BYTES: usize = 64 * 1024;
Expand DownExpand Up@@ -1038,26 +1038,24 @@ fn load_ntdll<Platform: crate::ShimPlatform, FS: crate::ShimFS>(
 fs: Arc<FS>,
 page_manager: &crate::WindowsPageManager<Platform>,
) -> Result<Option<LoadedNtDll>, WindowsLoadError> {
for path in NTDLL_PATHS {
match load_image_with_writable_sections(
 fs.clone(),
 path,
 platform,
 page_manager,
 NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
 let exports = ntdll_exports::<Platform>(&image)?;
 litebox_util_log::debug!(path:% = path; "Loaded guest ntdll.dll");
 return Ok(Some(LoadedNtDll { image, exports }));
 }
Err(error) if is_missing_file_error(&error) => {}
Err(error) => return Err(error),
match load_image_with_writable_sections(
fs,
NTDLL_PATH,
platform,
page_manager,
NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
let exports = ntdll_exports::<Platform>(&image)?;
litebox_util_log::debug!(path:% = NTDLL_PATH; "Loaded guest ntdll.dll");
Ok(Some(LoadedNtDll { image, exports }))
}
Err(error) if is_missing_file_error(&error) => {
litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
Ok(None)
 }
 Err(error) => Err(error),
 }

 litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
 Ok(None)
}

fn load_image<Platform: crate::ShimPlatform, FS: ShimFS>(
Expand Down

306 changes: 306 additions & 0 deletions
litebox_shim_windows/src/syscalls/condrv.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,306 @@
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

//! Windows console driver support.

use core::mem::size_of;

use int_enum::IntEnum;
use litebox::platform::{RawConstPointer as _, RawMutPointer as _};
use litebox_common_windows::nt_status::NtStatus;
use zerocopy::{FromBytes, Immutable, IntoBytes};

use crate::nt_types::IoStatusBlock;
use crate::{ConstPtr, MutPtr};

const FILE_DEVICE_CONSOLE: u32 = 0x50;
const CD_SERVER_EA_NAME: &[u8] = b"server";

#[repr(u8)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
pub(crate) enum CondrvObject {
 Input = 0,
 Output = 1,
 Server = 2,
 Reference = 3,
 Connect = 4,
}

impl CondrvObject {
 pub(crate) fn from_device_name(name: &str) -> Result<Self, NtStatus> {
 match Self::from_component(name) {
 Some(object @ (Self::Input | Self::Output | Self::Server)) => Ok(object),
 Some(Self::Reference) => Err(NtStatus::INVALID_HANDLE),
 Some(Self::Connect) => Err(NtStatus::OBJECT_TYPE_MISMATCH),
 None => Err(NtStatus::OBJECT_NAME_NOT_FOUND),
 }
 }

 fn from_component(name: &str) -> Option<Self> {
 if name.eq_ignore_ascii_case("Input") {
 Some(Self::Input)
 } else if name.eq_ignore_ascii_case("Output") {
 Some(Self::Output)
 } else if name.eq_ignore_ascii_case("Server") {
 Some(Self::Server)
 } else if name.eq_ignore_ascii_case("Reference") {
 Some(Self::Reference)
 } else if name.eq_ignore_ascii_case("Connect") {
 Some(Self::Connect)
 } else {
 None
 }
 }

 pub(crate) fn relative_child(self, name: &str) -> Result<Self, NtStatus> {
 let name = name.strip_prefix('\\').ok_or(NtStatus::NOT_FOUND)?;
 let child = Self::from_component(name).ok_or(NtStatus::NOT_FOUND)?;

 match (self, child) {
 (Self::Server, Self::Server | Self::Reference)
 | (Self::Reference, Self::Server | Self::Connect | Self::Input | Self::Output)
 | (Self::Input | Self::Output, Self::Server | Self::Input | Self::Output) => Ok(child),
 (Self::Server, Self::Input | Self::Output) => Err(NtStatus::INVALID_DEVICE_STATE),
 (Self::Reference | Self::Input | Self::Output, Self::Reference) => {
 Err(NtStatus::OBJECT_TYPE_MISMATCH)
 }
 (Self::Server | Self::Input | Self::Output, Self::Connect) | (Self::Connect, _) => {
 Err(NtStatus::INVALID_HANDLE)
 }
 }
 }

 pub(crate) fn handle_path(self) -> &'static str {
 match self {
 Self::Input => "/dev/stdin",
 Self::Output => "/dev/stdout",
 Self::Server => r"\Device\ConDrv\Server",
 Self::Reference => r"\Device\ConDrv\Reference",
 Self::Connect => r"\Device\ConDrv\Connect",
 }
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum IoControlMethod {
 Buffered = 0,
 InDirect = 1,
 OutDirect = 2,
 Neither = 3,
}

bitflags::bitflags! {
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 struct IoControlAccess: u32 {
 const ANY = 0;
 const READ = 1;
 const WRITE = 2;
 const _ = !0;
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum ConsoleIoControlFunction {
 LaunchServer = 13,
}

#[repr(C)]
#[derive(Clone, Copy, Debug, FromBytes, Immutable, IntoBytes)]
struct FileFullEaInformation {
 next_entry_offset: u32,
 flags: u8,
 ea_name_length: u8,
 ea_value_length: u16,
}

#[cfg(test)]
pub(crate) fn ea_buffer(name: &[u8], value_length: usize) -> alloc::vec::Vec<u8> {
 let header = FileFullEaInformation {
 next_entry_offset: 0,
 flags: 0,
 ea_name_length: u8::try_from(name.len()).unwrap(),
 ea_value_length: u16::try_from(value_length).unwrap(),
 };
 let mut buffer = alloc::vec::Vec::new();
 buffer.extend_from_slice(header.as_bytes());
 buffer.extend_from_slice(name);
 buffer.push(0);
 buffer.resize(buffer.len() + value_length, 0);
 buffer
}

pub(crate) fn validate_connect_server_ea<Platform: crate::ShimPlatform>(
 ea_buffer: Option<ConstPtr<Platform, u8>>,
 ea_length: u32,
) -> Result<(), NtStatus> {
 let Some(ea_buffer) = ea_buffer else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let ea_length = ea_length as usize;
 let Some(entry) = ConstPtr::<Platform, FileFullEaInformation>::from_usize(ea_buffer.as_usize())
 .read_at_offset(0)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };

 let name_offset = size_of::<FileFullEaInformation>();
 let name_length = entry.ea_name_length as usize;
 let value_length = entry.ea_value_length as usize;
 let value_offset = name_offset
 .checked_add(name_length)
 .and_then(|offset| offset.checked_add(1))
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 let entry_length = value_offset
 .checked_add(value_length)
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 if entry_length > ea_length {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(name_address) = ea_buffer.as_usize().checked_add(name_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let Some(name_with_nul) =
 ConstPtr::<Platform, u8>::from_usize(name_address).to_owned_slice(name_length + 1)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };
 let Some((&0, name)) = name_with_nul.split_last() else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 if !name.eq_ignore_ascii_case(CD_SERVER_EA_NAME) {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(value_address) = ea_buffer.as_usize().checked_add(value_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 // The ConDrv "server" EA value format is undocumented; probe the declared payload without
 // interpreting it until its semantics are understood.
 if ConstPtr::<Platform, u8>::from_usize(value_address)
 .to_owned_slice(value_length)
 .is_none()
 {
 return Err(NtStatus::ACCESS_VIOLATION);
 }

 Ok(())
}

pub(crate) fn handle_ioctl<Platform: crate::ShimPlatform>(
 condrv_object: CondrvObject,
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 io_control_code: u32,
 input_buffer: Option<ConstPtr<Platform, u8>>,
 input_buffer_length: u32,
 output_buffer: Option<MutPtr<Platform, u8>>,
 output_buffer_length: u32,
) -> NtStatus {
 let device_type = io_control_code >> 16;
 let access = IoControlAccess::from_bits_retain((io_control_code >> 14) & 0x3);
 let function = (io_control_code >> 2) & 0xfff;
 let method = IoControlMethod::try_from(io_control_code & 0x3);

 if device_type != FILE_DEVICE_CONSOLE || method != Ok(IoControlMethod::Neither) {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL shape"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 }

 let Ok(function) = ConsoleIoControlFunction::try_from(function) else {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL function"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 };

 match (condrv_object, function) {
 (CondrvObject::Server, ConsoleIoControlFunction::LaunchServer)
 if access.is_empty()
 && input_buffer.is_some()
 && input_buffer_length != 0
 && output_buffer.is_none()
 && output_buffer_length == 0 =>
 {
 if input_buffer
 .and_then(|input_buffer| input_buffer.read_at_offset(0))
 .is_none()
 {
 return complete_ioctl::<Platform>(io_status_block, NtStatus::ACCESS_VIOLATION, 0);
 }
 complete_ioctl::<Platform>(io_status_block, NtStatus::SUCCESS, 0)
 }
 _ => {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 function:? = function,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL for object"
 );
 complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0)
 }
 }
}

pub(crate) fn complete_ioctl<Platform: crate::ShimPlatform>(
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 status: NtStatus,
 information: usize,
) -> NtStatus {
 if io_status_block
 .write_at_offset(0, IoStatusBlock::new(status, information))
 .is_none()
 {
 return NtStatus::ACCESS_VIOLATION;
 }
 status
}

#[cfg(test)]
mod tests {
 use super::*;

 #[test]
 fn relative_children_match_host_parse_contexts() {
 use CondrvObject::{Connect, Input, Output, Reference, Server};

 for (parent, name, expected) in [
 (Server, r"\Server", Ok(Server)),
 (Server, r"\Reference", Ok(Reference)),
 (Server, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Server, r"\Input", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Server, r"\Output", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Reference, r"\Server", Ok(Server)),
 (Reference, r"\Connect", Ok(Connect)),
 (Reference, r"\Input", Ok(Input)),
 (Reference, r"\Output", Ok(Output)),
 (
 Reference,
 r"\Reference",
 Err(NtStatus::OBJECT_TYPE_MISMATCH),
 ),
 (Input, r"\Server", Ok(Server)),
 (Input, r"\Input", Ok(Input)),
 (Input, r"\Output", Ok(Output)),
 (Input, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Input, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Output, r"\Server", Ok(Server)),
 (Output, r"\Input", Ok(Input)),
 (Output, r"\Output", Ok(Output)),
 (Output, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Output, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 ] {
 assert_eq!(parent.relative_child(name), expected, "{parent:?} + {name}");
 }

 assert_eq!(Server.relative_child("Reference"), Err(NtStatus::NOT_FOUND));
 assert_eq!(Server.relative_child(r"\Missing"), Err(NtStatus::NOT_FOUND));
 }
}
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(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
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lastUrl = location.href;
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})();
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try {
var __m = "*";
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Refactor device ConDrv handling#1027

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 Merged

Weiteng Chen (CvvT)
merged 2 commits into

from

Jul 14, 2026
 Merged


Refactor device ConDrv handling
#1027
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3bc3f53

fix ConDrv device


CvvT Jul 13, 2026
e730ca9

minor fix


CvvT Jul 14, 2026

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26 changes: 26 additions & 0 deletions
litebox_shim_windows/src/lib.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1093,6 +1093,32 @@ impl<Platform: ShimPlatform, FS: ShimFS> Task<Platform, FS> {
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtDeviceIoControlFile {
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 } => {
 let status = self.sys_nt_device_io_control_file(
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtApphelpCacheControl {
 service_class,
 service_data,
Expand Down

36 changes: 17 additions & 19 deletions
litebox_shim_windows/src/loader/pe.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -35,7 +35,7 @@ use crate::syscalls::process::{INITIAL_PROCESS_ID, INITIAL_THREAD_ID};
use crate::{MutPtr, ShimFS};

const NTDLL_WRITABLE_SECTIONS: &[&[u8]] = &[b".mrdata"];
const NTDLL_PATHS: &[&str] = &["/Windows/System32/ntdll.dll", "/windows/system32/ntdll.dll"];
const NTDLL_PATH: &str = "/Windows/System32/ntdll.dll";
const RUNTIME_FUNCTION_ENTRY_SIZE: usize = 12;
const ZERO_CHUNK: [u8; PAGE_SIZE] = [0; PAGE_SIZE];
const FILE_CHUNK_BYTES: usize = 64 * 1024;
Expand DownExpand Up@@ -1038,26 +1038,24 @@ fn load_ntdll<Platform: crate::ShimPlatform, FS: crate::ShimFS>(
 fs: Arc<FS>,
 page_manager: &crate::WindowsPageManager<Platform>,
) -> Result<Option<LoadedNtDll>, WindowsLoadError> {
for path in NTDLL_PATHS {
match load_image_with_writable_sections(
 fs.clone(),
 path,
 platform,
 page_manager,
 NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
 let exports = ntdll_exports::<Platform>(&image)?;
 litebox_util_log::debug!(path:% = path; "Loaded guest ntdll.dll");
 return Ok(Some(LoadedNtDll { image, exports }));
 }
Err(error) if is_missing_file_error(&error) => {}
Err(error) => return Err(error),
match load_image_with_writable_sections(
fs,
NTDLL_PATH,
platform,
page_manager,
NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
let exports = ntdll_exports::<Platform>(&image)?;
litebox_util_log::debug!(path:% = NTDLL_PATH; "Loaded guest ntdll.dll");
Ok(Some(LoadedNtDll { image, exports }))
}
Err(error) if is_missing_file_error(&error) => {
litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
Ok(None)
 }
 Err(error) => Err(error),
 }

 litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
 Ok(None)
}

fn load_image<Platform: crate::ShimPlatform, FS: ShimFS>(
Expand Down

306 changes: 306 additions & 0 deletions
litebox_shim_windows/src/syscalls/condrv.rs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,306 @@
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

//! Windows console driver support.

use core::mem::size_of;

use int_enum::IntEnum;
use litebox::platform::{RawConstPointer as _, RawMutPointer as _};
use litebox_common_windows::nt_status::NtStatus;
use zerocopy::{FromBytes, Immutable, IntoBytes};

use crate::nt_types::IoStatusBlock;
use crate::{ConstPtr, MutPtr};

const FILE_DEVICE_CONSOLE: u32 = 0x50;
const CD_SERVER_EA_NAME: &[u8] = b"server";

#[repr(u8)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
pub(crate) enum CondrvObject {
 Input = 0,
 Output = 1,
 Server = 2,
 Reference = 3,
 Connect = 4,
}

impl CondrvObject {
 pub(crate) fn from_device_name(name: &str) -> Result<Self, NtStatus> {
 match Self::from_component(name) {
 Some(object @ (Self::Input | Self::Output | Self::Server)) => Ok(object),
 Some(Self::Reference) => Err(NtStatus::INVALID_HANDLE),
 Some(Self::Connect) => Err(NtStatus::OBJECT_TYPE_MISMATCH),
 None => Err(NtStatus::OBJECT_NAME_NOT_FOUND),
 }
 }

 fn from_component(name: &str) -> Option<Self> {
 if name.eq_ignore_ascii_case("Input") {
 Some(Self::Input)
 } else if name.eq_ignore_ascii_case("Output") {
 Some(Self::Output)
 } else if name.eq_ignore_ascii_case("Server") {
 Some(Self::Server)
 } else if name.eq_ignore_ascii_case("Reference") {
 Some(Self::Reference)
 } else if name.eq_ignore_ascii_case("Connect") {
 Some(Self::Connect)
 } else {
 None
 }
 }

 pub(crate) fn relative_child(self, name: &str) -> Result<Self, NtStatus> {
 let name = name.strip_prefix('\\').ok_or(NtStatus::NOT_FOUND)?;
 let child = Self::from_component(name).ok_or(NtStatus::NOT_FOUND)?;

 match (self, child) {
 (Self::Server, Self::Server | Self::Reference)
 | (Self::Reference, Self::Server | Self::Connect | Self::Input | Self::Output)
 | (Self::Input | Self::Output, Self::Server | Self::Input | Self::Output) => Ok(child),
 (Self::Server, Self::Input | Self::Output) => Err(NtStatus::INVALID_DEVICE_STATE),
 (Self::Reference | Self::Input | Self::Output, Self::Reference) => {
 Err(NtStatus::OBJECT_TYPE_MISMATCH)
 }
 (Self::Server | Self::Input | Self::Output, Self::Connect) | (Self::Connect, _) => {
 Err(NtStatus::INVALID_HANDLE)
 }
 }
 }

 pub(crate) fn handle_path(self) -> &'static str {
 match self {
 Self::Input => "/dev/stdin",
 Self::Output => "/dev/stdout",
 Self::Server => r"\Device\ConDrv\Server",
 Self::Reference => r"\Device\ConDrv\Reference",
 Self::Connect => r"\Device\ConDrv\Connect",
 }
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum IoControlMethod {
 Buffered = 0,
 InDirect = 1,
 OutDirect = 2,
 Neither = 3,
}

bitflags::bitflags! {
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 struct IoControlAccess: u32 {
 const ANY = 0;
 const READ = 1;
 const WRITE = 2;
 const _ = !0;
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum ConsoleIoControlFunction {
 LaunchServer = 13,
}

#[repr(C)]
#[derive(Clone, Copy, Debug, FromBytes, Immutable, IntoBytes)]
struct FileFullEaInformation {
 next_entry_offset: u32,
 flags: u8,
 ea_name_length: u8,
 ea_value_length: u16,
}

#[cfg(test)]
pub(crate) fn ea_buffer(name: &[u8], value_length: usize) -> alloc::vec::Vec<u8> {
 let header = FileFullEaInformation {
 next_entry_offset: 0,
 flags: 0,
 ea_name_length: u8::try_from(name.len()).unwrap(),
 ea_value_length: u16::try_from(value_length).unwrap(),
 };
 let mut buffer = alloc::vec::Vec::new();
 buffer.extend_from_slice(header.as_bytes());
 buffer.extend_from_slice(name);
 buffer.push(0);
 buffer.resize(buffer.len() + value_length, 0);
 buffer
}

pub(crate) fn validate_connect_server_ea<Platform: crate::ShimPlatform>(
 ea_buffer: Option<ConstPtr<Platform, u8>>,
 ea_length: u32,
) -> Result<(), NtStatus> {
 let Some(ea_buffer) = ea_buffer else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let ea_length = ea_length as usize;
 let Some(entry) = ConstPtr::<Platform, FileFullEaInformation>::from_usize(ea_buffer.as_usize())
 .read_at_offset(0)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };

 let name_offset = size_of::<FileFullEaInformation>();
 let name_length = entry.ea_name_length as usize;
 let value_length = entry.ea_value_length as usize;
 let value_offset = name_offset
 .checked_add(name_length)
 .and_then(|offset| offset.checked_add(1))
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 let entry_length = value_offset
 .checked_add(value_length)
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 if entry_length > ea_length {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(name_address) = ea_buffer.as_usize().checked_add(name_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let Some(name_with_nul) =
 ConstPtr::<Platform, u8>::from_usize(name_address).to_owned_slice(name_length + 1)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };
 let Some((&0, name)) = name_with_nul.split_last() else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 if !name.eq_ignore_ascii_case(CD_SERVER_EA_NAME) {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(value_address) = ea_buffer.as_usize().checked_add(value_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 // The ConDrv "server" EA value format is undocumented; probe the declared payload without
 // interpreting it until its semantics are understood.
 if ConstPtr::<Platform, u8>::from_usize(value_address)
 .to_owned_slice(value_length)
 .is_none()
 {
 return Err(NtStatus::ACCESS_VIOLATION);
 }

 Ok(())
}

pub(crate) fn handle_ioctl<Platform: crate::ShimPlatform>(
 condrv_object: CondrvObject,
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 io_control_code: u32,
 input_buffer: Option<ConstPtr<Platform, u8>>,
 input_buffer_length: u32,
 output_buffer: Option<MutPtr<Platform, u8>>,
 output_buffer_length: u32,
) -> NtStatus {
 let device_type = io_control_code >> 16;
 let access = IoControlAccess::from_bits_retain((io_control_code >> 14) & 0x3);
 let function = (io_control_code >> 2) & 0xfff;
 let method = IoControlMethod::try_from(io_control_code & 0x3);

 if device_type != FILE_DEVICE_CONSOLE || method != Ok(IoControlMethod::Neither) {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL shape"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 }

 let Ok(function) = ConsoleIoControlFunction::try_from(function) else {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL function"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 };

 match (condrv_object, function) {
 (CondrvObject::Server, ConsoleIoControlFunction::LaunchServer)
 if access.is_empty()
 && input_buffer.is_some()
 && input_buffer_length != 0
 && output_buffer.is_none()
 && output_buffer_length == 0 =>
 {
 if input_buffer
 .and_then(|input_buffer| input_buffer.read_at_offset(0))
 .is_none()
 {
 return complete_ioctl::<Platform>(io_status_block, NtStatus::ACCESS_VIOLATION, 0);
 }
 complete_ioctl::<Platform>(io_status_block, NtStatus::SUCCESS, 0)
 }
 _ => {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 function:? = function,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL for object"
 );
 complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0)
 }
 }
}

pub(crate) fn complete_ioctl<Platform: crate::ShimPlatform>(
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 status: NtStatus,
 information: usize,
) -> NtStatus {
 if io_status_block
 .write_at_offset(0, IoStatusBlock::new(status, information))
 .is_none()
 {
 return NtStatus::ACCESS_VIOLATION;
 }
 status
}

#[cfg(test)]
mod tests {
 use super::*;

 #[test]
 fn relative_children_match_host_parse_contexts() {
 use CondrvObject::{Connect, Input, Output, Reference, Server};

 for (parent, name, expected) in [
 (Server, r"\Server", Ok(Server)),
 (Server, r"\Reference", Ok(Reference)),
 (Server, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Server, r"\Input", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Server, r"\Output", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Reference, r"\Server", Ok(Server)),
 (Reference, r"\Connect", Ok(Connect)),
 (Reference, r"\Input", Ok(Input)),
 (Reference, r"\Output", Ok(Output)),
 (
 Reference,
 r"\Reference",
 Err(NtStatus::OBJECT_TYPE_MISMATCH),
 ),
 (Input, r"\Server", Ok(Server)),
 (Input, r"\Input", Ok(Input)),
 (Input, r"\Output", Ok(Output)),
 (Input, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Input, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Output, r"\Server", Ok(Server)),
 (Output, r"\Input", Ok(Input)),
 (Output, r"\Output", Ok(Output)),
 (Output, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Output, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 ] {
 assert_eq!(parent.relative_child(name), expected, "{parent:?} + {name}");
 }

 assert_eq!(Server.relative_child("Reference"), Err(NtStatus::NOT_FOUND));
 assert_eq!(Server.relative_child(r"\Missing"), Err(NtStatus::NOT_FOUND));
 }
}
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if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
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}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Refactor device ConDrv handling#1027

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 Merged

Weiteng Chen (CvvT)
merged 2 commits into

from

Jul 14, 2026
 Merged


Refactor device ConDrv handling
#1027
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3bc3f53

fix ConDrv device


CvvT Jul 13, 2026
e730ca9

minor fix


CvvT Jul 14, 2026

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litebox_shim_windows/src/lib.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1093,6 +1093,32 @@ impl<Platform: ShimPlatform, FS: ShimFS> Task<Platform, FS> {
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtDeviceIoControlFile {
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 } => {
 let status = self.sys_nt_device_io_control_file(
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtApphelpCacheControl {
 service_class,
 service_data,
Expand Down

36 changes: 17 additions & 19 deletions
litebox_shim_windows/src/loader/pe.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -35,7 +35,7 @@ use crate::syscalls::process::{INITIAL_PROCESS_ID, INITIAL_THREAD_ID};
use crate::{MutPtr, ShimFS};

const NTDLL_WRITABLE_SECTIONS: &[&[u8]] = &[b".mrdata"];
const NTDLL_PATHS: &[&str] = &["/Windows/System32/ntdll.dll", "/windows/system32/ntdll.dll"];
const NTDLL_PATH: &str = "/Windows/System32/ntdll.dll";
const RUNTIME_FUNCTION_ENTRY_SIZE: usize = 12;
const ZERO_CHUNK: [u8; PAGE_SIZE] = [0; PAGE_SIZE];
const FILE_CHUNK_BYTES: usize = 64 * 1024;
Expand DownExpand Up@@ -1038,26 +1038,24 @@ fn load_ntdll<Platform: crate::ShimPlatform, FS: crate::ShimFS>(
 fs: Arc<FS>,
 page_manager: &crate::WindowsPageManager<Platform>,
) -> Result<Option<LoadedNtDll>, WindowsLoadError> {
for path in NTDLL_PATHS {
match load_image_with_writable_sections(
 fs.clone(),
 path,
 platform,
 page_manager,
 NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
 let exports = ntdll_exports::<Platform>(&image)?;
 litebox_util_log::debug!(path:% = path; "Loaded guest ntdll.dll");
 return Ok(Some(LoadedNtDll { image, exports }));
 }
Err(error) if is_missing_file_error(&error) => {}
Err(error) => return Err(error),
match load_image_with_writable_sections(
fs,
NTDLL_PATH,
platform,
page_manager,
NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
let exports = ntdll_exports::<Platform>(&image)?;
litebox_util_log::debug!(path:% = NTDLL_PATH; "Loaded guest ntdll.dll");
Ok(Some(LoadedNtDll { image, exports }))
}
Err(error) if is_missing_file_error(&error) => {
litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
Ok(None)
 }
 Err(error) => Err(error),
 }

 litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
 Ok(None)
}

fn load_image<Platform: crate::ShimPlatform, FS: ShimFS>(
Expand Down

306 changes: 306 additions & 0 deletions
litebox_shim_windows/src/syscalls/condrv.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,306 @@
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

//! Windows console driver support.

use core::mem::size_of;

use int_enum::IntEnum;
use litebox::platform::{RawConstPointer as _, RawMutPointer as _};
use litebox_common_windows::nt_status::NtStatus;
use zerocopy::{FromBytes, Immutable, IntoBytes};

use crate::nt_types::IoStatusBlock;
use crate::{ConstPtr, MutPtr};

const FILE_DEVICE_CONSOLE: u32 = 0x50;
const CD_SERVER_EA_NAME: &[u8] = b"server";

#[repr(u8)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
pub(crate) enum CondrvObject {
 Input = 0,
 Output = 1,
 Server = 2,
 Reference = 3,
 Connect = 4,
}

impl CondrvObject {
 pub(crate) fn from_device_name(name: &str) -> Result<Self, NtStatus> {
 match Self::from_component(name) {
 Some(object @ (Self::Input | Self::Output | Self::Server)) => Ok(object),
 Some(Self::Reference) => Err(NtStatus::INVALID_HANDLE),
 Some(Self::Connect) => Err(NtStatus::OBJECT_TYPE_MISMATCH),
 None => Err(NtStatus::OBJECT_NAME_NOT_FOUND),
 }
 }

 fn from_component(name: &str) -> Option<Self> {
 if name.eq_ignore_ascii_case("Input") {
 Some(Self::Input)
 } else if name.eq_ignore_ascii_case("Output") {
 Some(Self::Output)
 } else if name.eq_ignore_ascii_case("Server") {
 Some(Self::Server)
 } else if name.eq_ignore_ascii_case("Reference") {
 Some(Self::Reference)
 } else if name.eq_ignore_ascii_case("Connect") {
 Some(Self::Connect)
 } else {
 None
 }
 }

 pub(crate) fn relative_child(self, name: &str) -> Result<Self, NtStatus> {
 let name = name.strip_prefix('\\').ok_or(NtStatus::NOT_FOUND)?;
 let child = Self::from_component(name).ok_or(NtStatus::NOT_FOUND)?;

 match (self, child) {
 (Self::Server, Self::Server | Self::Reference)
 | (Self::Reference, Self::Server | Self::Connect | Self::Input | Self::Output)
 | (Self::Input | Self::Output, Self::Server | Self::Input | Self::Output) => Ok(child),
 (Self::Server, Self::Input | Self::Output) => Err(NtStatus::INVALID_DEVICE_STATE),
 (Self::Reference | Self::Input | Self::Output, Self::Reference) => {
 Err(NtStatus::OBJECT_TYPE_MISMATCH)
 }
 (Self::Server | Self::Input | Self::Output, Self::Connect) | (Self::Connect, _) => {
 Err(NtStatus::INVALID_HANDLE)
 }
 }
 }

 pub(crate) fn handle_path(self) -> &'static str {
 match self {
 Self::Input => "/dev/stdin",
 Self::Output => "/dev/stdout",
 Self::Server => r"\Device\ConDrv\Server",
 Self::Reference => r"\Device\ConDrv\Reference",
 Self::Connect => r"\Device\ConDrv\Connect",
 }
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum IoControlMethod {
 Buffered = 0,
 InDirect = 1,
 OutDirect = 2,
 Neither = 3,
}

bitflags::bitflags! {
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 struct IoControlAccess: u32 {
 const ANY = 0;
 const READ = 1;
 const WRITE = 2;
 const _ = !0;
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum ConsoleIoControlFunction {
 LaunchServer = 13,
}

#[repr(C)]
#[derive(Clone, Copy, Debug, FromBytes, Immutable, IntoBytes)]
struct FileFullEaInformation {
 next_entry_offset: u32,
 flags: u8,
 ea_name_length: u8,
 ea_value_length: u16,
}

#[cfg(test)]
pub(crate) fn ea_buffer(name: &[u8], value_length: usize) -> alloc::vec::Vec<u8> {
 let header = FileFullEaInformation {
 next_entry_offset: 0,
 flags: 0,
 ea_name_length: u8::try_from(name.len()).unwrap(),
 ea_value_length: u16::try_from(value_length).unwrap(),
 };
 let mut buffer = alloc::vec::Vec::new();
 buffer.extend_from_slice(header.as_bytes());
 buffer.extend_from_slice(name);
 buffer.push(0);
 buffer.resize(buffer.len() + value_length, 0);
 buffer
}

pub(crate) fn validate_connect_server_ea<Platform: crate::ShimPlatform>(
 ea_buffer: Option<ConstPtr<Platform, u8>>,
 ea_length: u32,
) -> Result<(), NtStatus> {
 let Some(ea_buffer) = ea_buffer else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let ea_length = ea_length as usize;
 let Some(entry) = ConstPtr::<Platform, FileFullEaInformation>::from_usize(ea_buffer.as_usize())
 .read_at_offset(0)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };

 let name_offset = size_of::<FileFullEaInformation>();
 let name_length = entry.ea_name_length as usize;
 let value_length = entry.ea_value_length as usize;
 let value_offset = name_offset
 .checked_add(name_length)
 .and_then(|offset| offset.checked_add(1))
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 let entry_length = value_offset
 .checked_add(value_length)
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 if entry_length > ea_length {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(name_address) = ea_buffer.as_usize().checked_add(name_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let Some(name_with_nul) =
 ConstPtr::<Platform, u8>::from_usize(name_address).to_owned_slice(name_length + 1)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };
 let Some((&0, name)) = name_with_nul.split_last() else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 if !name.eq_ignore_ascii_case(CD_SERVER_EA_NAME) {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(value_address) = ea_buffer.as_usize().checked_add(value_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 // The ConDrv "server" EA value format is undocumented; probe the declared payload without
 // interpreting it until its semantics are understood.
 if ConstPtr::<Platform, u8>::from_usize(value_address)
 .to_owned_slice(value_length)
 .is_none()
 {
 return Err(NtStatus::ACCESS_VIOLATION);
 }

 Ok(())
}

pub(crate) fn handle_ioctl<Platform: crate::ShimPlatform>(
 condrv_object: CondrvObject,
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 io_control_code: u32,
 input_buffer: Option<ConstPtr<Platform, u8>>,
 input_buffer_length: u32,
 output_buffer: Option<MutPtr<Platform, u8>>,
 output_buffer_length: u32,
) -> NtStatus {
 let device_type = io_control_code >> 16;
 let access = IoControlAccess::from_bits_retain((io_control_code >> 14) & 0x3);
 let function = (io_control_code >> 2) & 0xfff;
 let method = IoControlMethod::try_from(io_control_code & 0x3);

 if device_type != FILE_DEVICE_CONSOLE || method != Ok(IoControlMethod::Neither) {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL shape"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 }

 let Ok(function) = ConsoleIoControlFunction::try_from(function) else {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL function"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 };

 match (condrv_object, function) {
 (CondrvObject::Server, ConsoleIoControlFunction::LaunchServer)
 if access.is_empty()
 && input_buffer.is_some()
 && input_buffer_length != 0
 && output_buffer.is_none()
 && output_buffer_length == 0 =>
 {
 if input_buffer
 .and_then(|input_buffer| input_buffer.read_at_offset(0))
 .is_none()
 {
 return complete_ioctl::<Platform>(io_status_block, NtStatus::ACCESS_VIOLATION, 0);
 }
 complete_ioctl::<Platform>(io_status_block, NtStatus::SUCCESS, 0)
 }
 _ => {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 function:? = function,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL for object"
 );
 complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0)
 }
 }
}

pub(crate) fn complete_ioctl<Platform: crate::ShimPlatform>(
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 status: NtStatus,
 information: usize,
) -> NtStatus {
 if io_status_block
 .write_at_offset(0, IoStatusBlock::new(status, information))
 .is_none()
 {
 return NtStatus::ACCESS_VIOLATION;
 }
 status
}

#[cfg(test)]
mod tests {
 use super::*;

 #[test]
 fn relative_children_match_host_parse_contexts() {
 use CondrvObject::{Connect, Input, Output, Reference, Server};

 for (parent, name, expected) in [
 (Server, r"\Server", Ok(Server)),
 (Server, r"\Reference", Ok(Reference)),
 (Server, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Server, r"\Input", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Server, r"\Output", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Reference, r"\Server", Ok(Server)),
 (Reference, r"\Connect", Ok(Connect)),
 (Reference, r"\Input", Ok(Input)),
 (Reference, r"\Output", Ok(Output)),
 (
 Reference,
 r"\Reference",
 Err(NtStatus::OBJECT_TYPE_MISMATCH),
 ),
 (Input, r"\Server", Ok(Server)),
 (Input, r"\Input", Ok(Input)),
 (Input, r"\Output", Ok(Output)),
 (Input, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Input, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Output, r"\Server", Ok(Server)),
 (Output, r"\Input", Ok(Input)),
 (Output, r"\Output", Ok(Output)),
 (Output, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Output, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 ] {
 assert_eq!(parent.relative_child(name), expected, "{parent:?} + {name}");
 }

 assert_eq!(Server.relative_child("Reference"), Err(NtStatus::NOT_FOUND));
 assert_eq!(Server.relative_child(r"\Missing"), Err(NtStatus::NOT_FOUND));
 }
}
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Refactor device ConDrv handling#1027

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 Merged

Weiteng Chen (CvvT)
merged 2 commits into

from

Jul 14, 2026
 Merged


Refactor device ConDrv handling
#1027
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3bc3f53

fix ConDrv device


CvvT Jul 13, 2026
e730ca9

minor fix


CvvT Jul 14, 2026

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26 changes: 26 additions & 0 deletions
litebox_shim_windows/src/lib.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1093,6 +1093,32 @@ impl<Platform: ShimPlatform, FS: ShimFS> Task<Platform, FS> {
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtDeviceIoControlFile {
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 } => {
 let status = self.sys_nt_device_io_control_file(
 file_handle,
 event,
 apc_routine,
 apc_context,
 io_status_block,
 io_control_code,
 input_buffer,
 input_buffer_length,
 output_buffer,
 output_buffer_length,
 );
 (status, ContinueOperation::Resume)
 }
 SyscallRequest::NtApphelpCacheControl {
 service_class,
 service_data,
Expand Down

36 changes: 17 additions & 19 deletions
litebox_shim_windows/src/loader/pe.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -35,7 +35,7 @@ use crate::syscalls::process::{INITIAL_PROCESS_ID, INITIAL_THREAD_ID};
use crate::{MutPtr, ShimFS};

const NTDLL_WRITABLE_SECTIONS: &[&[u8]] = &[b".mrdata"];
const NTDLL_PATHS: &[&str] = &["/Windows/System32/ntdll.dll", "/windows/system32/ntdll.dll"];
const NTDLL_PATH: &str = "/Windows/System32/ntdll.dll";
const RUNTIME_FUNCTION_ENTRY_SIZE: usize = 12;
const ZERO_CHUNK: [u8; PAGE_SIZE] = [0; PAGE_SIZE];
const FILE_CHUNK_BYTES: usize = 64 * 1024;
Expand DownExpand Up@@ -1038,26 +1038,24 @@ fn load_ntdll<Platform: crate::ShimPlatform, FS: crate::ShimFS>(
 fs: Arc<FS>,
 page_manager: &crate::WindowsPageManager<Platform>,
) -> Result<Option<LoadedNtDll>, WindowsLoadError> {
for path in NTDLL_PATHS {
match load_image_with_writable_sections(
 fs.clone(),
 path,
 platform,
 page_manager,
 NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
 let exports = ntdll_exports::<Platform>(&image)?;
 litebox_util_log::debug!(path:% = path; "Loaded guest ntdll.dll");
 return Ok(Some(LoadedNtDll { image, exports }));
 }
Err(error) if is_missing_file_error(&error) => {}
Err(error) => return Err(error),
match load_image_with_writable_sections(
fs,
NTDLL_PATH,
platform,
page_manager,
NTDLL_WRITABLE_SECTIONS,
) {
Ok(image) => {
let exports = ntdll_exports::<Platform>(&image)?;
litebox_util_log::debug!(path:% = NTDLL_PATH; "Loaded guest ntdll.dll");
Ok(Some(LoadedNtDll { image, exports }))
}
Err(error) if is_missing_file_error(&error) => {
litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
Ok(None)
 }
 Err(error) => Err(error),
 }

 litebox_util_log::debug!("Guest ntdll.dll was not found in the initial filesystem");
 Ok(None)
}

fn load_image<Platform: crate::ShimPlatform, FS: ShimFS>(
Expand Down

306 changes: 306 additions & 0 deletions
litebox_shim_windows/src/syscalls/condrv.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,306 @@
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

//! Windows console driver support.

use core::mem::size_of;

use int_enum::IntEnum;
use litebox::platform::{RawConstPointer as _, RawMutPointer as _};
use litebox_common_windows::nt_status::NtStatus;
use zerocopy::{FromBytes, Immutable, IntoBytes};

use crate::nt_types::IoStatusBlock;
use crate::{ConstPtr, MutPtr};

const FILE_DEVICE_CONSOLE: u32 = 0x50;
const CD_SERVER_EA_NAME: &[u8] = b"server";

#[repr(u8)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
pub(crate) enum CondrvObject {
 Input = 0,
 Output = 1,
 Server = 2,
 Reference = 3,
 Connect = 4,
}

impl CondrvObject {
 pub(crate) fn from_device_name(name: &str) -> Result<Self, NtStatus> {
 match Self::from_component(name) {
 Some(object @ (Self::Input | Self::Output | Self::Server)) => Ok(object),
 Some(Self::Reference) => Err(NtStatus::INVALID_HANDLE),
 Some(Self::Connect) => Err(NtStatus::OBJECT_TYPE_MISMATCH),
 None => Err(NtStatus::OBJECT_NAME_NOT_FOUND),
 }
 }

 fn from_component(name: &str) -> Option<Self> {
 if name.eq_ignore_ascii_case("Input") {
 Some(Self::Input)
 } else if name.eq_ignore_ascii_case("Output") {
 Some(Self::Output)
 } else if name.eq_ignore_ascii_case("Server") {
 Some(Self::Server)
 } else if name.eq_ignore_ascii_case("Reference") {
 Some(Self::Reference)
 } else if name.eq_ignore_ascii_case("Connect") {
 Some(Self::Connect)
 } else {
 None
 }
 }

 pub(crate) fn relative_child(self, name: &str) -> Result<Self, NtStatus> {
 let name = name.strip_prefix('\\').ok_or(NtStatus::NOT_FOUND)?;
 let child = Self::from_component(name).ok_or(NtStatus::NOT_FOUND)?;

 match (self, child) {
 (Self::Server, Self::Server | Self::Reference)
 | (Self::Reference, Self::Server | Self::Connect | Self::Input | Self::Output)
 | (Self::Input | Self::Output, Self::Server | Self::Input | Self::Output) => Ok(child),
 (Self::Server, Self::Input | Self::Output) => Err(NtStatus::INVALID_DEVICE_STATE),
 (Self::Reference | Self::Input | Self::Output, Self::Reference) => {
 Err(NtStatus::OBJECT_TYPE_MISMATCH)
 }
 (Self::Server | Self::Input | Self::Output, Self::Connect) | (Self::Connect, _) => {
 Err(NtStatus::INVALID_HANDLE)
 }
 }
 }

 pub(crate) fn handle_path(self) -> &'static str {
 match self {
 Self::Input => "/dev/stdin",
 Self::Output => "/dev/stdout",
 Self::Server => r"\Device\ConDrv\Server",
 Self::Reference => r"\Device\ConDrv\Reference",
 Self::Connect => r"\Device\ConDrv\Connect",
 }
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum IoControlMethod {
 Buffered = 0,
 InDirect = 1,
 OutDirect = 2,
 Neither = 3,
}

bitflags::bitflags! {
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 struct IoControlAccess: u32 {
 const ANY = 0;
 const READ = 1;
 const WRITE = 2;
 const _ = !0;
 }
}

#[repr(u32)]
#[derive(Clone, Copy, Debug, Eq, IntEnum, PartialEq)]
enum ConsoleIoControlFunction {
 LaunchServer = 13,
}

#[repr(C)]
#[derive(Clone, Copy, Debug, FromBytes, Immutable, IntoBytes)]
struct FileFullEaInformation {
 next_entry_offset: u32,
 flags: u8,
 ea_name_length: u8,
 ea_value_length: u16,
}

#[cfg(test)]
pub(crate) fn ea_buffer(name: &[u8], value_length: usize) -> alloc::vec::Vec<u8> {
 let header = FileFullEaInformation {
 next_entry_offset: 0,
 flags: 0,
 ea_name_length: u8::try_from(name.len()).unwrap(),
 ea_value_length: u16::try_from(value_length).unwrap(),
 };
 let mut buffer = alloc::vec::Vec::new();
 buffer.extend_from_slice(header.as_bytes());
 buffer.extend_from_slice(name);
 buffer.push(0);
 buffer.resize(buffer.len() + value_length, 0);
 buffer
}

pub(crate) fn validate_connect_server_ea<Platform: crate::ShimPlatform>(
 ea_buffer: Option<ConstPtr<Platform, u8>>,
 ea_length: u32,
) -> Result<(), NtStatus> {
 let Some(ea_buffer) = ea_buffer else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let ea_length = ea_length as usize;
 let Some(entry) = ConstPtr::<Platform, FileFullEaInformation>::from_usize(ea_buffer.as_usize())
 .read_at_offset(0)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };

 let name_offset = size_of::<FileFullEaInformation>();
 let name_length = entry.ea_name_length as usize;
 let value_length = entry.ea_value_length as usize;
 let value_offset = name_offset
 .checked_add(name_length)
 .and_then(|offset| offset.checked_add(1))
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 let entry_length = value_offset
 .checked_add(value_length)
 .ok_or(NtStatus::EAS_NOT_SUPPORTED)?;
 if entry_length > ea_length {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(name_address) = ea_buffer.as_usize().checked_add(name_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 let Some(name_with_nul) =
 ConstPtr::<Platform, u8>::from_usize(name_address).to_owned_slice(name_length + 1)
 else {
 return Err(NtStatus::ACCESS_VIOLATION);
 };
 let Some((&0, name)) = name_with_nul.split_last() else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 if !name.eq_ignore_ascii_case(CD_SERVER_EA_NAME) {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 }

 let Some(value_address) = ea_buffer.as_usize().checked_add(value_offset) else {
 return Err(NtStatus::EAS_NOT_SUPPORTED);
 };
 // The ConDrv "server" EA value format is undocumented; probe the declared payload without
 // interpreting it until its semantics are understood.
 if ConstPtr::<Platform, u8>::from_usize(value_address)
 .to_owned_slice(value_length)
 .is_none()
 {
 return Err(NtStatus::ACCESS_VIOLATION);
 }

 Ok(())
}

pub(crate) fn handle_ioctl<Platform: crate::ShimPlatform>(
 condrv_object: CondrvObject,
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 io_control_code: u32,
 input_buffer: Option<ConstPtr<Platform, u8>>,
 input_buffer_length: u32,
 output_buffer: Option<MutPtr<Platform, u8>>,
 output_buffer_length: u32,
) -> NtStatus {
 let device_type = io_control_code >> 16;
 let access = IoControlAccess::from_bits_retain((io_control_code >> 14) & 0x3);
 let function = (io_control_code >> 2) & 0xfff;
 let method = IoControlMethod::try_from(io_control_code & 0x3);

 if device_type != FILE_DEVICE_CONSOLE || method != Ok(IoControlMethod::Neither) {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL shape"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 }

 let Ok(function) = ConsoleIoControlFunction::try_from(function) else {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL function"
 );
 return complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0);
 };

 match (condrv_object, function) {
 (CondrvObject::Server, ConsoleIoControlFunction::LaunchServer)
 if access.is_empty()
 && input_buffer.is_some()
 && input_buffer_length != 0
 && output_buffer.is_none()
 && output_buffer_length == 0 =>
 {
 if input_buffer
 .and_then(|input_buffer| input_buffer.read_at_offset(0))
 .is_none()
 {
 return complete_ioctl::<Platform>(io_status_block, NtStatus::ACCESS_VIOLATION, 0);
 }
 complete_ioctl::<Platform>(io_status_block, NtStatus::SUCCESS, 0)
 }
 _ => {
 litebox_util_log::debug!(
 condrv_object:? = condrv_object,
 function:? = function,
 io_control_code:% = format_args!("{io_control_code:#x}");
 "Unsupported ConDrv IOCTL for object"
 );
 complete_ioctl::<Platform>(io_status_block, NtStatus::NOT_SUPPORTED, 0)
 }
 }
}

pub(crate) fn complete_ioctl<Platform: crate::ShimPlatform>(
 io_status_block: MutPtr<Platform, IoStatusBlock>,
 status: NtStatus,
 information: usize,
) -> NtStatus {
 if io_status_block
 .write_at_offset(0, IoStatusBlock::new(status, information))
 .is_none()
 {
 return NtStatus::ACCESS_VIOLATION;
 }
 status
}

#[cfg(test)]
mod tests {
 use super::*;

 #[test]
 fn relative_children_match_host_parse_contexts() {
 use CondrvObject::{Connect, Input, Output, Reference, Server};

 for (parent, name, expected) in [
 (Server, r"\Server", Ok(Server)),
 (Server, r"\Reference", Ok(Reference)),
 (Server, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Server, r"\Input", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Server, r"\Output", Err(NtStatus::INVALID_DEVICE_STATE)),
 (Reference, r"\Server", Ok(Server)),
 (Reference, r"\Connect", Ok(Connect)),
 (Reference, r"\Input", Ok(Input)),
 (Reference, r"\Output", Ok(Output)),
 (
 Reference,
 r"\Reference",
 Err(NtStatus::OBJECT_TYPE_MISMATCH),
 ),
 (Input, r"\Server", Ok(Server)),
 (Input, r"\Input", Ok(Input)),
 (Input, r"\Output", Ok(Output)),
 (Input, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Input, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 (Output, r"\Server", Ok(Server)),
 (Output, r"\Input", Ok(Input)),
 (Output, r"\Output", Ok(Output)),
 (Output, r"\Reference", Err(NtStatus::OBJECT_TYPE_MISMATCH)),
 (Output, r"\Connect", Err(NtStatus::INVALID_HANDLE)),
 ] {
 assert_eq!(parent.relative_child(name), expected, "{parent:?} + {name}");
 }

 assert_eq!(Server.relative_child("Reference"), Err(NtStatus::NOT_FOUND));
 assert_eq!(Server.relative_child(r"\Missing"), Err(NtStatus::NOT_FOUND));
 }
}
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