rjit is a toy runtime assembler written in Rust.
By using this, you can run or test the assembly directly without linking process.

Feature

• x86_64 assembly (NOT 32bit)
• AT＆T syntax support.

Quick Start

$ cargo build --release

// exit.s will exit with code 42.
$ ./target/release/rjit --file=./examples/exit.s

// check exit code.
$ echo $?
    -> 42

Debug

If you want to check internal process , use gdb.

Supported Assembly Syntax

• nop
• add
• sub
• mov
• ret
• int
• syscall

also, please check examples directory.

Restriction

• input is one assembly(.s) file.
• no libc support.
  • but I'm thinking of adding my own implementation for libc that doesn't need the linking process. (ex: printf, malloc, etc...)

Reference

• Intel SDM
• Online x86 / x64 Assembler and Disassembler
• X86 Opcode and Instruction Reference
• x86_64 機械語入門