Giter Site home page Giter Site logo

ras's Introduction

ras

  • Assembler for x86_64 for learning to write with almost nothing to look at.

  • I will try to write an assembler in Rust based only on his implementation in V lang.

References

License

Licensed under either of

at your option.

ras's People

Contributors

sardonyx-sard avatar

Watchers

avatar

ras's Issues

[Candidate] Pattern for creating tuple arrays of register information using many macros.

I thought I might be able to make it easier with macro in exchange for readability, but the current (v1.72) rustc does not seem to be able to pattern match on range (e.g. 0..10), so this seems to be strictly possible only with proc_macro.

use crate::error::{bail, Result};
use seq_macro::seq;

#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
pub(crate) struct Register {
    pub(crate) lit: &'static str,
    pub(crate) size: DataSizeSuffix,
    pub(crate) base_offset: u8,
    /// Need rex prefix?
    pub(crate) rex_required: bool,
}

#[derive(Clone, Debug, Copy, Default, PartialEq, Eq, PartialOrd, Ord)]
pub(crate) enum DataSizeSuffix {
    Byte,
    Word,
    Long,
    Quad,
    #[default]
    Unknown,
}

macro_rules! register_tuple {
    (0, $size:expr $(, $prefix:tt)?) => { register_tuple!(concat!($($prefix,)? "AX"), 0, $size) };
    (1, $size:expr $(, $prefix:tt)?) => { register_tuple!(concat!($($prefix,)? "CX"), 1, $size) };
    (2, $size:expr $(, $prefix:tt)?) => { register_tuple!(concat!($($prefix,)? "DX"), 2, $size) };
    (3, $size:expr $(, $prefix:tt)?) => { register_tuple!(concat!($($prefix,)? "BX"), 3, $size) };
    (4, $size:expr $(, $prefix:tt)?) => { register_tuple!(concat!($($prefix,)? "SP"), 4, $size) };
    (5, $size:expr $(, $prefix:tt)?) => { register_tuple!(concat!($($prefix,)? "BP"), 5, $size) };
    (6, $size:expr $(, $prefix:tt)?) => { register_tuple!(concat!($($prefix,)? "SI"), 6, $size) };
    (7, $size:expr $(, $prefix:tt)?) => { register_tuple!(concat!($($prefix,)? "DI"), 7, $size) };
    ($lit:expr, $base_offset:expr, $size:expr) => {
        register_tuple!($lit, $base_offset, $size, false)
    };
    ($lit:expr, $base_offset:expr, $size:expr, $rex_required:expr) => {
        (
            $lit,
            Register {
                lit: $lit,
                base_offset: $base_offset,
                size: $size,
                rex_required: $rex_required,
            },
        )
    };
}

#[rustfmt::skip]
macro_rules! gpr_64bit_tuple {
    (0) => { register_tuple!(0, DataSizeSuffix::Quad, "R") };
    (1) => { register_tuple!(1, DataSizeSuffix::Quad, "R") };
    (2) => { register_tuple!(2, DataSizeSuffix::Quad, "R") };
    (3) => { register_tuple!(3, DataSizeSuffix::Quad, "R") };
    (4) => { register_tuple!(4, DataSizeSuffix::Quad, "R") };
    (5) => { register_tuple!(5, DataSizeSuffix::Quad, "R") };
    (6) => { register_tuple!(6, DataSizeSuffix::Quad, "R") };
    (7) => { register_tuple!(7, DataSizeSuffix::Quad, "R") };
    ($size:tt) => {
        register_tuple!(concat!("R", $size), $size, DataSizeSuffix::Quad)
    };
}

#[rustfmt::skip]
macro_rules! gpr_32bit_tuple {
    (0) => { register_tuple!(0, DataSizeSuffix::Long, "E") };
    (1) => { register_tuple!(1, DataSizeSuffix::Long, "E") };
    (2) => { register_tuple!(2, DataSizeSuffix::Long, "E") };
    (3) => { register_tuple!(3, DataSizeSuffix::Long, "E") };
    (4) => { register_tuple!(4, DataSizeSuffix::Long, "E") };
    (5) => { register_tuple!(5, DataSizeSuffix::Long, "E") };
    (6) => { register_tuple!(6, DataSizeSuffix::Long, "E") };
    (7) => { register_tuple!(7, DataSizeSuffix::Long, "E") };
    ($size:tt) => {
        register_tuple!(concat!("R", $size, "D"), $size, DataSizeSuffix::Long)
    };
}

#[rustfmt::skip]
macro_rules! gpr_16bit_tuple {
    (0) => { register_tuple!(0, DataSizeSuffix::Word) };
    (1) => { register_tuple!(1, DataSizeSuffix::Word) };
    (2) => { register_tuple!(2, DataSizeSuffix::Word) };
    (3) => { register_tuple!(3, DataSizeSuffix::Word) };
    (4) => { register_tuple!(4, DataSizeSuffix::Word) };
    (5) => { register_tuple!(5, DataSizeSuffix::Word) };
    (6) => { register_tuple!(6, DataSizeSuffix::Word) };
    (7) => { register_tuple!(7, DataSizeSuffix::Word) };
    ($size:tt) => {
        gpr_16bit_tuple!(concat!("R", stringify!($size), "W"), $size)
    };
    ($lit:expr, $size:tt) => {
        register_tuple!($lit, $size, DataSizeSuffix::Word)
    };
}

macro_rules! gpr_8bit_tuple {
    ($lit:tt) => {
        register_tuple!(concat!("R", $lit, "B"), $lit, DataSizeSuffix::Byte)
    };
}

#[rustfmt::skip]
const GENERAL_REGISTERS: [(&str, Register); 72] = [
    // 64bit
    register_tuple!( "RAX",  0, DataSizeSuffix::Quad),
    register_tuple!( "RCX",  1, DataSizeSuffix::Quad),
    register_tuple!( "RDX",  2, DataSizeSuffix::Quad),
    register_tuple!( "RBX",  3, DataSizeSuffix::Quad),
    register_tuple!( "RSP",  4, DataSizeSuffix::Quad),
    register_tuple!( "RBP",  5, DataSizeSuffix::Quad),
    register_tuple!( "RSI",  6, DataSizeSuffix::Quad),
    register_tuple!( "RDI",  7, DataSizeSuffix::Quad),
    register_tuple!(  "R8",  8, DataSizeSuffix::Quad),
    register_tuple!(  "R9",  9, DataSizeSuffix::Quad),
    register_tuple!( "R10", 10, DataSizeSuffix::Quad),
    register_tuple!( "R11", 11, DataSizeSuffix::Quad),
    register_tuple!( "R12", 12, DataSizeSuffix::Quad),
    register_tuple!( "R13", 13, DataSizeSuffix::Quad),
    register_tuple!( "R14", 14, DataSizeSuffix::Quad),
    register_tuple!( "R15", 15, DataSizeSuffix::Quad),
    // 32bit
    register_tuple!( "EAX",  0, DataSizeSuffix::Long),
    register_tuple!( "ECX",  1, DataSizeSuffix::Long),
    register_tuple!( "EDX",  2, DataSizeSuffix::Long),
    register_tuple!( "EBX",  3, DataSizeSuffix::Long),
    register_tuple!( "ESP",  4, DataSizeSuffix::Long),
    register_tuple!( "EBP",  5, DataSizeSuffix::Long),
    register_tuple!( "ESI",  6, DataSizeSuffix::Long),
    register_tuple!( "EDI",  7, DataSizeSuffix::Long),
    register_tuple!( "R8D",  8, DataSizeSuffix::Long),
    register_tuple!( "R9D",  9, DataSizeSuffix::Long),
    register_tuple!("R10D", 10, DataSizeSuffix::Long),
    register_tuple!("R11D", 11, DataSizeSuffix::Long),
    register_tuple!("R12D", 12, DataSizeSuffix::Long),
    register_tuple!("R13D", 13, DataSizeSuffix::Long),
    register_tuple!("R14D", 14, DataSizeSuffix::Long),
    register_tuple!("R15D", 15, DataSizeSuffix::Long),
    // 16bit
    register_tuple!(  "AX",  0, DataSizeSuffix::Word),
    register_tuple!(  "CX",  1, DataSizeSuffix::Word),
    register_tuple!(  "DX",  2, DataSizeSuffix::Word),
    register_tuple!(  "BX",  3, DataSizeSuffix::Word),
    register_tuple!(  "SP",  4, DataSizeSuffix::Word),
    register_tuple!(  "BP",  5, DataSizeSuffix::Word),
    register_tuple!(  "SI",  6, DataSizeSuffix::Word),
    register_tuple!(  "DI",  7, DataSizeSuffix::Word),
    register_tuple!( "R8W",  8, DataSizeSuffix::Word),
    register_tuple!( "R9W",  9, DataSizeSuffix::Word),
    register_tuple!("R10W", 10, DataSizeSuffix::Word),
    register_tuple!("R11W", 11, DataSizeSuffix::Word),
    register_tuple!("R12W", 12, DataSizeSuffix::Word),
    register_tuple!("R13W", 13, DataSizeSuffix::Word),
    register_tuple!("R14W", 14, DataSizeSuffix::Word),
    register_tuple!("R15W", 15, DataSizeSuffix::Word),
    // 8bit
    register_tuple!(  "AL",  0, DataSizeSuffix::Byte),
    register_tuple!(  "CL",  1, DataSizeSuffix::Byte),
    register_tuple!(  "DL",  2, DataSizeSuffix::Byte),
    register_tuple!(  "BL",  3, DataSizeSuffix::Byte),
    register_tuple!(  "AH",  4, DataSizeSuffix::Byte),
    register_tuple!(  "BP",  5, DataSizeSuffix::Byte),
    register_tuple!(  "CH",  5, DataSizeSuffix::Byte),
    register_tuple!(  "DH",  6, DataSizeSuffix::Byte),
    register_tuple!(  "BH",  7, DataSizeSuffix::Byte),
    register_tuple!( "SPL",  4, DataSizeSuffix::Byte, true),
    register_tuple!( "BPL",  5, DataSizeSuffix::Byte, true),
    register_tuple!( "SIL",  6, DataSizeSuffix::Byte, true),
    register_tuple!( "DIL",  7, DataSizeSuffix::Byte, true),
    register_tuple!( "R8B",  8, DataSizeSuffix::Byte),
    register_tuple!( "R9B",  9, DataSizeSuffix::Byte),
    register_tuple!("R10B", 10, DataSizeSuffix::Byte),
    register_tuple!("R11B", 11, DataSizeSuffix::Byte),
    register_tuple!("R12B", 12, DataSizeSuffix::Byte),
    register_tuple!("R13B", 13, DataSizeSuffix::Byte),
    register_tuple!("R14B", 14, DataSizeSuffix::Byte),
    register_tuple!("R15B", 15, DataSizeSuffix::Byte),
    // instruction pointers(counter)
    register_tuple!( "RIP",  0, DataSizeSuffix::Quad),
    register_tuple!( "EIP",  0, DataSizeSuffix::Long),
    register_tuple!(  "IP",  0, DataSizeSuffix::Word),
];

macro_rules! xmm_entry {
    ($index:expr) => {
        (
            concat!("XMM", stringify!($index)),
            Register {
                lit: concat!("XMM", stringify!($index)),
                base_offset: $index,
                size: DataSizeSuffix::Unknown,
                rex_required: false,
            },
        )
    };
}

seq!(N in 0..16 {
const XMM_REGISTERS: [(&str, Register); 16] = [
    #(xmm_entry!(N),)*
];
});

/// Get(Copy) general register from GENERAL global const by str key.
pub(crate) fn get_reg_by(key: &str) -> Result<Register> {
    let e = GENERAL_REGISTERS
        .binary_search_by(|(k, _)| k.cmp(&key))
        .map(|x| GENERAL_REGISTERS[x].1);
    match e {
        Ok(v) => Ok(v),
        Err(l) => bail!("Couldn't find register. index: {}", l),
    }
}

/// Get(Copy) XMM register from XMM global const by str key.
pub(crate) fn get_xmm_by(key: &str) -> Result<Register> {
    let e = XMM_REGISTERS
        .binary_search_by(|(k, _)| k.cmp(&key))
        .map(|x| XMM_REGISTERS[x].1);
    match e {
        Ok(v) => Ok(v),
        Err(l) => bail!("Couldn't find register. index: {}", l),
    }
}

#[test]
fn show_registers() {
    dbg!(GENERAL_REGISTERS);
    // dbg!(XMM_REGISTERS);
}

Recommend Projects

  • React photo React

    A declarative, efficient, and flexible JavaScript library for building user interfaces.

  • Vue.js photo Vue.js

    🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.

  • Typescript photo Typescript

    TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

  • TensorFlow photo TensorFlow

    An Open Source Machine Learning Framework for Everyone

  • Django photo Django

    The Web framework for perfectionists with deadlines.

  • D3 photo D3

    Bring data to life with SVG, Canvas and HTML. 📊📈🎉

Recommend Topics

  • javascript

    JavaScript (JS) is a lightweight interpreted programming language with first-class functions.

  • web

    Some thing interesting about web. New door for the world.

  • server

    A server is a program made to process requests and deliver data to clients.

  • Machine learning

    Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.

  • Game

    Some thing interesting about game, make everyone happy.

Recommend Org

  • Facebook photo Facebook

    We are working to build community through open source technology. NB: members must have two-factor auth.

  • Microsoft photo Microsoft

    Open source projects and samples from Microsoft.

  • Google photo Google

    Google ❤️ Open Source for everyone.

  • D3 photo D3

    Data-Driven Documents codes.