Files
wasmtime/crates/lightbeam/src/disassemble.rs
Dan Gohman 22641de629 Initial reorg.
This is largely the same as #305, but updated for the current tree.
2019-11-08 06:35:40 -08:00

52 lines
1.2 KiB
Rust

use capstone::prelude::*;
use dynasmrt::AssemblyOffset;
use std::error::Error;
use std::fmt::{Display, Write};
pub fn disassemble(
mem: &[u8],
mut ops: &[(AssemblyOffset, impl Display)],
) -> Result<(), Box<dyn Error>> {
let cs = Capstone::new()
.x86()
.mode(arch::x86::ArchMode::Mode64)
.build()?;
println!("{} bytes:", mem.len());
let insns = cs.disasm_all(&mem, 0x0)?;
for i in insns.iter() {
let mut line = String::new();
let address = i.address();
while let Some((offset, op)) = ops.first() {
if offset.0 as u64 <= address {
ops = &ops[1..];
println!("{}", op);
} else {
break;
}
}
write!(&mut line, "{:4x}:\t", i.address())?;
let mut bytes_str = String::new();
for b in i.bytes() {
write!(&mut bytes_str, "{:02x} ", b)?;
}
write!(&mut line, "{:24}\t", bytes_str)?;
if let Some(s) = i.mnemonic() {
write!(&mut line, "{}\t", s)?;
}
if let Some(s) = i.op_str() {
write!(&mut line, "{}", s)?;
}
println!("{}", line);
}
Ok(())
}