forked from AbleOS/holey-bytes
Implemented some portion of VM, missing validation
This commit is contained in:
ondra05
parent
a4b22e2053
commit
e67d512f89
7
Cargo.lock
generated
7
Cargo.lock
generated
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@ -38,6 +38,7 @@ version = "0.1.0"
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dependencies = [
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"hashbrown",
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"log",
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"static_assertions",
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]
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[[package]]
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@ -55,6 +56,12 @@ version = "1.17.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b7e5500299e16ebb147ae15a00a942af264cf3688f47923b8fc2cd5858f23ad3"
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[[package]]
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name = "static_assertions"
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version = "1.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
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[[package]]
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name = "version_check"
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version = "0.9.4"
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@ -3,6 +3,10 @@ name = "hbvm"
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version = "0.1.0"
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edition = "2021"
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[profile.release]
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lto = true
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[dependencies]
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log = "*"
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hashbrown = "0.13.2"
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static_assertions = "1.0"
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56
hbvm/src/bytecode.rs
Normal file
56
hbvm/src/bytecode.rs
Normal file
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@ -0,0 +1,56 @@
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pub const REG_COUNT: usize = 60;
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macro_rules! constmod {
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($vis:vis $mname:ident($repr:ty) { $($cname:ident = $val:expr),* $(,)? }) => {
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$vis mod $mname {
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$(pub const $cname: $repr = $val;)*
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}
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};
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}
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constmod!(pub opcode(u8) {
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NOP = 0, // _
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ADD = 1, // RRR
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SUB = 2, // RRR
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MUL = 3, // RRR
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DIV = 4, // RRR
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REM = 5, // RRR
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AND = 6, // RRR
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OR = 7, // RRR
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XOR = 8, // RRR
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NOT = 9, // RR
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// TODO: Add instruction for integer and float
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// reg ← reg + imm instructions
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ADDF = 10, // RRR
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SUBF = 11, // RRR
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MULF = 12, // RRR
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DIVF = 13, // RRR
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LI = 14, // RI
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LD = 15, // RI
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ST = 16, // RI
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MAPPAGE = 17, // ?
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UNMAPPAGE = 18, // ?
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JMP = 100, // I
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JMPCOND = 101, // I
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RET = 103, // _
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ECALL = 255, // _
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});
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#[repr(packed)] pub struct ParamRRR(pub u8, pub u8, pub u8);
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#[repr(packed)] pub struct ParamRR(pub u8, pub u8);
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#[repr(packed)] pub struct ParamRI(pub u8, pub u64);
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/// # Safety
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/// TODO.
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pub unsafe trait OpParam {}
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unsafe impl OpParam for ParamRRR {}
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unsafe impl OpParam for ParamRR {}
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unsafe impl OpParam for ParamRI {}
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unsafe impl OpParam for u64 {}
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unsafe impl OpParam for () {}
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@ -1,39 +0,0 @@
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mod validate;
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#[derive(Clone, Copy, Debug, PartialEq, Eq)]
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#[repr(u8)]
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pub enum Instruction {
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Nop = 0,
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Add(Register, Register, Register),
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Sub(Register, Register, Register) = 2,
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Mul(Register, Register, Register) = 3,
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Div(Register, Register, Register) = 4,
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Mod(Register, Register, Register) = 5,
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And(Register, Register, Register) = 6,
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Or(Register, Register, Register) = 7,
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Xor(Register, Register, Register) = 8,
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Not(Register, Register) = 9,
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Li(Register, u64) = 10,
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Ld(Register, u64) = 15,
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St(Register, u64) = 16,
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MapPage = 17,
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UnmapPage = 18,
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Jmp = 100,
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JumpCond = 101,
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Ret = 103,
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Ecall = 255,
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}
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#[derive(Clone, Copy, Debug, PartialEq, Eq)]
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#[repr(u8)]
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#[rustfmt::skip]
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pub enum Register {
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X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15, X16, X17, X18, X19, X20,
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X21, X22, X23, X24, X25, X26, X27, X28, X29, X30, X31, X32, X33, X34, X35, X36, X37, X38, X39,
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X40, X41, X42, X43, X44, X45, X46, X47, X48, X49, X50, X51, X52, X53, X54, X55, X56, X57, X58,
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X59,
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}
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@ -1,6 +0,0 @@
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use alloc::vec::Vec;
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pub type CallStack = Vec<FnCall>;
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pub struct FnCall {
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pub ret: usize,
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}
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@ -1,13 +0,0 @@
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pub struct EngineConfig {
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pub call_stack_depth: usize,
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pub quantum: u32,
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}
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impl EngineConfig {
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pub fn default() -> Self {
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Self {
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call_stack_depth: 32,
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quantum: 0,
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}
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}
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}
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@ -1,3 +0,0 @@
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use super::Engine;
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pub type EnviromentCall = fn(&mut Engine) -> Result<&mut Engine, u64>;
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@ -1,102 +0,0 @@
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use log::info;
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pub mod call_stack;
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pub mod config;
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pub mod enviroment_calls;
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pub mod regs;
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#[cfg(test)]
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pub mod tests;
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use {
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self::call_stack::CallStack,
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crate::{engine::enviroment_calls::EnviromentCall, memory, HaltStatus, RuntimeErrors},
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alloc::vec::Vec,
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config::EngineConfig,
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log::trace,
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regs::Registers,
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};
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// pub const PAGE_SIZE: usize = 8192;
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pub struct RealPage {
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pub ptr: *mut u8,
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}
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#[derive(Debug, Clone, Copy)]
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pub struct VMPage {
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pub data: [u8; 8192],
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}
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impl Default for VMPage {
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fn default() -> Self {
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Self {
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data: [0; 4096 * 2],
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}
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}
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}
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pub enum Page {
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VMPage(VMPage),
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RealPage(RealPage),
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}
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impl Page {
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pub fn data(&self) -> [u8; 4096 * 2] {
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match self {
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Page::VMPage(vmpage) => vmpage.data,
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Page::RealPage(_) => {
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unimplemented!("Memmapped hw page not yet supported")
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}
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}
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}
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}
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pub fn empty_enviroment_call(engine: &mut Engine) -> Result<&mut Engine, u64> {
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trace!("Registers {:?}", engine.registers);
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Err(0)
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}
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pub struct Engine {
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pub pc: usize,
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pub program: Vec<u8>,
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pub registers: Registers,
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pub config: EngineConfig,
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/// BUG: This DOES NOT account for overflowing
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pub last_timer_count: u32,
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pub timer_callback: Option<fn() -> u32>,
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pub memory: memory::Memory,
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pub enviroment_call_table: [Option<EnviromentCall>; 256],
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pub call_stack: CallStack,
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}
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impl Engine {
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pub fn set_timer_callback(&mut self, func: fn() -> u32) {
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self.timer_callback = Some(func);
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}
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}
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impl Engine {
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pub fn new(program: Vec<u8>) -> Self {
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let mut mem = memory::Memory::new();
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for (addr, byte) in program.clone().into_iter().enumerate() {
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let _ = mem.set_addr8(addr as u64, byte);
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}
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trace!("{:?}", mem.read_addr8(0));
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let ecall_table: [Option<EnviromentCall>; 256] = [None; 256];
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Self {
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pc: 0,
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program,
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registers: Registers::default(),
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config: EngineConfig::default(),
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last_timer_count: 0,
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timer_callback: None,
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enviroment_call_table: ecall_table,
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memory: mem,
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call_stack: Vec::new(),
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}
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}
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pub fn dump(&self) {}
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pub fn run(&mut self) -> Result<HaltStatus, RuntimeErrors> {
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Ok(HaltStatus::Running)
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}
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}
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@ -1,125 +0,0 @@
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use {
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super::Engine,
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crate::{HaltStatus, RuntimeErrors},
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alloc::vec,
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RuntimeErrors::*,
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};
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#[test]
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fn invalid_program() {
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let prog = vec![1, 0];
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let mut eng = Engine::new(prog);
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let ret = eng.run();
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assert_eq!(ret, Err(InvalidOpcodePair(1, 0)));
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}
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#[test]
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fn empty_program() {
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let prog = vec![];
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let mut eng = Engine::new(prog);
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let ret = eng.run();
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assert_eq!(ret, Ok(HaltStatus::Halted));
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}
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#[test]
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fn max_quantum_reached() {
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let prog = vec![0, 0, 0, 0];
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let mut eng = Engine::new(prog);
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eng.set_timer_callback(|| {
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return 1;
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});
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eng.config.quantum = 1;
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let ret = eng.run();
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assert_eq!(ret, Ok(HaltStatus::Running));
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}
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#[test]
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fn jump_out_of_bounds() {
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use crate::bytecode::ops::Operations::JUMP;
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let prog = vec![JUMP as u8, 0, 0, 0, 0, 0, 0, 1, 0];
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let mut eng = Engine::new(prog);
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let ret = eng.run();
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assert_eq!(ret, Err(InvalidJumpAddress(256)));
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}
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#[test]
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fn invalid_system_call() {
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let prog = vec![255, 0];
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let mut eng = Engine::new(prog);
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let ret = eng.run();
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assert_eq!(ret, Err(InvalidSystemCall(0)));
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}
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#[test]
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fn add_u8() {
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use crate::bytecode::ops::{MathOpSides::ConstantConstant, Operations::ADD};
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let prog = vec![ADD as u8, ConstantConstant as u8, 100, 98, 0xA0];
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let mut eng = Engine::new(prog);
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let _ = eng.run();
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assert_eq!(eng.registers.a0, 2);
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}
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#[test]
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fn sub_u8() {
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use crate::bytecode::ops::Operations::SUB;
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let prog = vec![SUB as u8];
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let mut eng = Engine::new(prog);
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let _ = eng.run();
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assert_eq!(eng.registers.a0, 1);
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}
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#[test]
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fn mul_u8() {
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use crate::bytecode::ops::{MathOpSides::ConstantConstant, Operations::MUL};
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let prog = vec![MUL as u8, ConstantConstant as u8, 1, 2, 0xA0];
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let mut eng = Engine::new(prog);
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let _ = eng.run();
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assert_eq!(eng.registers.a0, 2);
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}
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#[test]
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fn div_u8() {
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use crate::bytecode::ops::Operations::DIV;
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let prog = vec![DIV as u8];
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let mut eng = Engine::new(prog);
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let _ = eng.run();
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assert_eq!(eng.registers.a0, 2);
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}
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#[test]
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fn set_register() {
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let prog = alloc::vec![];
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let mut eng = Engine::new(prog);
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eng.set_register(0xA0, 1);
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assert_eq!(eng.registers.a0, 1);
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}
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#[test]
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fn load_u8() {
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use crate::bytecode::ops::{Operations::LOAD, RWSubTypes::AddrToReg};
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let prog = vec![LOAD as u8, AddrToReg as u8, 0, 0, 0, 0, 0, 0, 1, 0, 0xA0];
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let mut eng = Engine::new(prog);
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let ret = eng.memory.set_addr8(256, 1);
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assert_eq!(ret, Ok(()));
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let _ = eng.run();
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assert_eq!(eng.registers.a0, 1);
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}
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#[test]
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fn set_memory_8() {
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let prog = vec![];
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let mut eng = Engine::new(prog);
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let ret = eng.memory.set_addr8(256, 1);
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assert_eq!(ret, Ok(()));
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}
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#[test]
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fn set_memory_64() {
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let prog = vec![];
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let mut eng = Engine::new(prog);
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let ret = eng.memory.set_addr64(256, 1);
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assert_eq!(ret, Ok(()));
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}
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@ -2,8 +2,8 @@
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extern crate alloc;
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pub mod bytecode;
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pub mod engine;
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pub mod memory;
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pub mod validate;
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pub mod vm;
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#[derive(Debug, PartialEq)]
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pub enum RuntimeErrors {
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@ -1,30 +1,17 @@
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use hbvm::{
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bytecode::Instruction,
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engine::Engine,
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RuntimeErrors, HaltStatus,
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};
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use hbvm::{vm::Vm, RuntimeErrors};
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fn main() -> Result<(), RuntimeErrors> {
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// TODO: Grab program from cmdline
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#[rustfmt::skip]
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let prog: Vec<u8> = vec![
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];
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let mut eng = Engine::new(prog);
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// eng.set_timer_callback(time);
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eng.enviroment_call_table[10] = Some(print_fn);
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while eng.run()? != HaltStatus::Halted {}
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eng.dump();
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println!("{:#?}", eng.registers);
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let prog = &[];
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unsafe {
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let mut vm = Vm::new_unchecked(prog);
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vm.run();
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}
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Ok(())
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}
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pub fn time() -> u32 {
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9
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}
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pub fn print_fn(engine: &mut Engine) -> Result<&mut Engine, u64> {
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println!("hello");
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Ok(engine)
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}
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@ -1,70 +0,0 @@
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use crate::engine::VMPage;
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use {
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crate::{engine::Page, RuntimeErrors},
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alloc::vec::Vec,
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hashbrown::HashMap,
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log::trace,
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};
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pub struct Memory {
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inner: HashMap<u64, Page>,
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}
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impl Memory {
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pub fn new() -> Self {
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Self {
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inner: HashMap::new(),
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}
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//
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}
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pub fn map_vec(&mut self, address: u64, vec: Vec<u8>) {
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panic!("Mapping vectors into pages is not supported yet");
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}
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}
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impl Memory {
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pub fn read_addr8(&mut self, address: u64) -> Result<u8, RuntimeErrors> {
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let (page, offset) = addr_to_page(address);
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trace!("page {} offset {}", page, offset);
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match self.inner.get(&page) {
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Some(page) => {
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let val = page.data()[offset as usize];
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trace!("Value {}", val);
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Ok(val)
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}
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None => {
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trace!("page not mapped");
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Err(RuntimeErrors::PageNotMapped(page))
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}
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}
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}
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pub fn read_addr64(&mut self, address: u64) -> u64 {
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unimplemented!()
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}
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pub fn set_addr8(&mut self, address: u64, value: u8) -> Result<(), RuntimeErrors> {
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let (page, offset) = addr_to_page(address);
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let ret: Option<(&u64, &mut Page)> = self.inner.get_key_value_mut(&page);
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match ret {
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Some((_, page)) => {
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page.data()[offset as usize] = value;
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}
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None => {
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let mut pg = VMPage::default();
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pg.data[offset as usize] = value;
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self.inner.insert(page, Page::VMPage(pg));
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trace!("Mapped page {}", page);
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}
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}
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Ok(())
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}
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pub fn set_addr64(&mut self, address: u64, value: u64) -> Result<(), RuntimeErrors> {
|
||||
unimplemented!()
|
||||
}
|
||||
}
|
||||
|
||||
fn addr_to_page(addr: u64) -> (u64, u64) {
|
||||
(addr / 8192, addr % 8192)
|
||||
}
|
||||
95
hbvm/src/vm/mod.rs
Normal file
95
hbvm/src/vm/mod.rs
Normal file
|
|
@ -0,0 +1,95 @@
|
|||
mod value;
|
||||
|
||||
use {
|
||||
crate::bytecode::{OpParam, ParamRI, ParamRR, ParamRRR},
|
||||
core::ops,
|
||||
static_assertions::assert_impl_one,
|
||||
value::Value,
|
||||
};
|
||||
|
||||
macro_rules! param {
|
||||
($self:expr, $ty:ty) => {{
|
||||
assert_impl_one!($ty: OpParam);
|
||||
let data = $self.program.as_ptr()
|
||||
.add($self.pc + 1)
|
||||
.cast::<$ty>()
|
||||
.read();
|
||||
$self.pc += 1 + core::mem::size_of::<$ty>();
|
||||
data
|
||||
}};
|
||||
}
|
||||
|
||||
macro_rules! binary_op {
|
||||
($self:expr, $ty:ident, $handler:expr) => {{
|
||||
let ParamRRR(tg, a0, a1) = param!($self, ParamRRR);
|
||||
*$self.reg_mut(tg) = $handler(Value::$ty($self.reg(a0)), Value::$ty($self.reg(a1))).into();
|
||||
}};
|
||||
}
|
||||
|
||||
pub struct Vm<'a> {
|
||||
pub registers: [Value; 60],
|
||||
pc: usize,
|
||||
program: &'a [u8],
|
||||
}
|
||||
|
||||
impl<'a> Vm<'a> {
|
||||
/// # Safety
|
||||
/// Program code has to be validated
|
||||
pub unsafe fn new_unchecked(program: &'a [u8]) -> Self {
|
||||
Self {
|
||||
registers: [Value::from(0); 60],
|
||||
pc: 0,
|
||||
program,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn run(&mut self) {
|
||||
use crate::bytecode::opcode::*;
|
||||
loop {
|
||||
let Some(&opcode) = self.program.get(self.pc)
|
||||
else { return };
|
||||
|
||||
unsafe {
|
||||
match opcode {
|
||||
NOP => param!(self, ()),
|
||||
ADD => binary_op!(self, int, u64::wrapping_add),
|
||||
SUB => binary_op!(self, int, u64::wrapping_sub),
|
||||
MUL => binary_op!(self, int, u64::wrapping_mul),
|
||||
DIV => binary_op!(self, int, u64::wrapping_div),
|
||||
REM => binary_op!(self, int, u64::wrapping_rem),
|
||||
AND => binary_op!(self, int, ops::BitAnd::bitand),
|
||||
OR => binary_op!(self, int, ops::BitOr::bitor),
|
||||
XOR => binary_op!(self, int, ops::BitXor::bitxor),
|
||||
NOT => {
|
||||
let param = param!(self, ParamRR);
|
||||
*self.reg_mut(param.0) = (!self.reg(param.1).int()).into();
|
||||
}
|
||||
ADDF => binary_op!(self, float, ops::Add::add),
|
||||
SUBF => binary_op!(self, float, ops::Sub::sub),
|
||||
MULF => binary_op!(self, float, ops::Mul::mul),
|
||||
DIVF => binary_op!(self, float, ops::Div::div),
|
||||
LI => {
|
||||
let param = param!(self, ParamRI);
|
||||
*self.reg_mut(param.0) = param.1.into();
|
||||
}
|
||||
// TODO: LD, ST
|
||||
JMP => {
|
||||
self.pc =
|
||||
self.program.as_ptr().add(self.pc + 1).cast::<u64>().read() as usize;
|
||||
}
|
||||
_ => core::hint::unreachable_unchecked(),
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
unsafe fn reg(&self, n: u8) -> &Value {
|
||||
self.registers.get_unchecked(n as usize)
|
||||
}
|
||||
|
||||
#[inline]
|
||||
unsafe fn reg_mut(&mut self, n: u8) -> &mut Value {
|
||||
self.registers.get_unchecked_mut(n as usize)
|
||||
}
|
||||
}
|
||||
|
|
@ -3,31 +3,6 @@ use core::{
|
|||
ops::{Index, IndexMut},
|
||||
};
|
||||
|
||||
#[derive(Debug, Clone, Copy)]
|
||||
pub struct Registers([Value; 60]);
|
||||
|
||||
impl Index<u8> for Registers {
|
||||
type Output = Value;
|
||||
|
||||
#[inline]
|
||||
fn index(&self, index: u8) -> &Self::Output {
|
||||
&self.0[index as usize]
|
||||
}
|
||||
}
|
||||
|
||||
impl IndexMut<u8> for Registers {
|
||||
#[inline]
|
||||
fn index_mut(&mut self, index: u8) -> &mut Self::Output {
|
||||
&mut self.0[index as usize]
|
||||
}
|
||||
}
|
||||
|
||||
impl Default for Registers {
|
||||
fn default() -> Self {
|
||||
Self([Value { i: 0 }; 60])
|
||||
}
|
||||
}
|
||||
|
||||
/// # Safety
|
||||
/// The macro invoker shall make sure that byte reinterpret-cast
|
||||
/// won't cause undefined behaviour.
|
||||
Loading…
Reference in a new issue