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#![no_std]
#![feature(decl_macro, type_ascription, box_syntax)]
extern crate alloc;
#[cfg(test)]
extern crate std;
#[cfg(test)]
mod test_utils;
pub(crate) mod misc;
pub(crate) mod name_object;
pub(crate) mod namespace;
pub(crate) mod opcode;
pub(crate) mod parser;
pub(crate) mod pkg_length;
pub(crate) mod term_object;
pub(crate) mod type1;
pub(crate) mod type2;
pub mod value;
pub use crate::{
namespace::{AmlHandle, AmlName, Namespace},
value::AmlValue,
};
use alloc::string::String;
use log::error;
use misc::{ArgNum, LocalNum};
use parser::Parser;
use pkg_length::PkgLength;
use term_object::term_list;
use value::Args;
pub const AML_INTERPRETER_REVISION: u64 = 0;
#[derive(Debug)]
pub struct AmlContext {
pub namespace: Namespace,
current_scope: AmlName,
local_0: Option<AmlValue>,
local_1: Option<AmlValue>,
local_2: Option<AmlValue>,
local_3: Option<AmlValue>,
local_4: Option<AmlValue>,
local_5: Option<AmlValue>,
local_6: Option<AmlValue>,
local_7: Option<AmlValue>,
current_args: Option<Args>,
}
impl AmlContext {
pub fn new() -> AmlContext {
AmlContext {
namespace: Namespace::new(),
current_scope: AmlName::root(),
local_0: None,
local_1: None,
local_2: None,
local_3: None,
local_4: None,
local_5: None,
local_6: None,
local_7: None,
current_args: None,
}
}
pub fn parse_table(&mut self, stream: &[u8]) -> Result<(), AmlError> {
if stream.len() == 0 {
return Err(AmlError::UnexpectedEndOfStream);
}
let table_length = PkgLength::from_raw_length(stream, stream.len() as u32) as PkgLength;
match term_object::term_list(table_length).parse(stream, self) {
Ok(_) => Ok(()),
Err((_, _, err)) => {
error!("Failed to parse AML stream. Err = {:?}", err);
Err(err)
}
}
}
pub fn invoke_method(&mut self, path: &AmlName, args: Args) -> Result<AmlValue, AmlError> {
if let AmlValue::Method { flags, code } = self.namespace.get_by_path(path)?.clone() {
self.current_scope = path.clone();
self.current_args = Some(args);
self.local_0 = None;
self.local_1 = None;
self.local_2 = None;
self.local_3 = None;
self.local_4 = None;
self.local_5 = None;
self.local_6 = None;
self.local_7 = None;
let return_value =
match term_list(PkgLength::from_raw_length(&code, code.len() as u32)).parse(&code, self) {
Ok(_) => Ok(AmlValue::Integer(0)),
Err((_, _, AmlError::Return(result))) => Ok(result),
Err((_, _, err)) => {
error!("Failed to execute control method: {:?}", err);
Err(err)
}
};
self.current_args = None;
self.local_0 = None;
self.local_1 = None;
self.local_2 = None;
self.local_3 = None;
self.local_4 = None;
self.local_5 = None;
self.local_6 = None;
self.local_7 = None;
return_value
} else {
Err(AmlError::IncompatibleValueConversion)
}
}
pub(crate) fn current_arg(&self, arg: ArgNum) -> Result<&AmlValue, AmlError> {
self.current_args.as_ref().ok_or(AmlError::InvalidArgumentAccess(0xff))?.arg(arg)
}
pub(crate) fn local(&self, local: LocalNum) -> Result<&AmlValue, AmlError> {
match local {
0 => self.local_0.as_ref().ok_or(AmlError::InvalidLocalAccess(local)),
1 => self.local_1.as_ref().ok_or(AmlError::InvalidLocalAccess(local)),
2 => self.local_2.as_ref().ok_or(AmlError::InvalidLocalAccess(local)),
3 => self.local_3.as_ref().ok_or(AmlError::InvalidLocalAccess(local)),
4 => self.local_4.as_ref().ok_or(AmlError::InvalidLocalAccess(local)),
5 => self.local_5.as_ref().ok_or(AmlError::InvalidLocalAccess(local)),
6 => self.local_6.as_ref().ok_or(AmlError::InvalidLocalAccess(local)),
7 => self.local_7.as_ref().ok_or(AmlError::InvalidLocalAccess(local)),
_ => panic!("Invalid local number: {}", local),
}
}
}
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum AmlError {
UnexpectedEndOfStream,
UnexpectedByte(u8),
InvalidNameSeg([u8; 4]),
InvalidFieldFlags,
IncompatibleValueConversion,
UnterminatedStringConstant,
InvalidStringConstant,
InvalidRegionSpace(u8),
WrongParser,
InvalidNormalizedName(String),
RootHasNoParent,
ObjectDoesNotExist(String),
HandleDoesNotExist(AmlHandle),
NameCollision(AmlName),
InvalidArgumentAccess(ArgNum),
InvalidLocalAccess(LocalNum),
Return(AmlValue),
}