56 lines
1.3 KiB
Rust
56 lines
1.3 KiB
Rust
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use std::convert::TryFrom;
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use std::io::ErrorKind;
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use std::io::{Cursor, Seek, SeekFrom};
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use byteorder::{LittleEndian, ReadBytesExt};
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use super::arm7tdmi::arm;
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pub struct Disassembler<'a> {
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base: u32,
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rdr: Cursor<&'a [u8]>,
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}
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impl<'a> Disassembler<'a> {
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pub fn new(base: u32, bin: &'a [u8]) -> Disassembler {
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Disassembler {
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base: base,
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rdr: Cursor::new(bin),
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}
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}
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}
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impl<'a> Seek for Disassembler<'a> {
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fn seek(&mut self, pos: SeekFrom) -> std::io::Result<u64> {
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self.rdr.seek(pos)
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}
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}
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impl<'a> Iterator for Disassembler<'a> {
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type Item = String;
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fn next(&mut self) -> Option<Self::Item> {
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let mut line = String::new();
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let value: u32 = match self.rdr.read_u32::<LittleEndian>() {
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Ok(value) => value,
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Err(e) => match e.kind() {
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ErrorKind::UnexpectedEof => {
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return None;
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}
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_ => panic!("unexpected error"),
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},
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};
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let addr = self.base + (self.rdr.position() - 4) as u32;
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line.push_str(&format!("{:8x}:\t{:08x} \t", addr, value));
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match arm::ArmInstruction::try_from((value, addr)) {
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Ok(insn) => line.push_str(&format!("{}", insn)),
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Err(_) => line.push_str("<UNDEFINED>"),
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};
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Some(line)
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}
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}
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