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|
use yaxpeax_arch::{AddressBase, Arch, Decoder, Instruction, LengthedInstruction};
use clap::*;
use num_traits::identities::Zero;
use std::fmt;
use std::fs::File;
use std::io::Read;
use std::collections::BTreeSet;
fn main() {
let _ = include_str!("../Cargo.toml");
let app = app_from_crate!()
.arg(
Arg::with_name("arch")
.short("a")
.long("--architecture")
.takes_value(true)
.validator(|a| {
if ["x86_64", "x86:32", "ia64", "armv7", "armv8", "avr", "mips", "msp430",
"pic17", "pic18", "m16c"].contains(&&a[..]) ||
(["sh", "sh2", "sh3", "sh4", "j2"].contains(
&&a[0..a.find(|c| c == '+' || c == '-').unwrap_or(a.len())]) &&
a.split(|c| c == '+' || c == '-').skip(1).all(
|f| ["be", "mmu", "fpu", "f64", "j2"].contains(&f))) {
Ok(())
} else {
Err("possible values: x86_64, x86:32, ia64, armv7, armv8, avr, mips, \
msp430, pic17, pic18, m16c, \
{sh{,2,3,4},j2}[[+-]{be,mmu,fpu,f64,j2}]*"
.to_string())
}
})
.help("architecture to disassemble input as."),
)
.arg(
Arg::with_name("file")
.short("f")
.long("file")
.takes_value(true)
.help("file of bytes to decode"),
)
.arg(
Arg::with_name("verbose")
.short("v")
.long("--verbose")
.help("increased detail when decoding instructions"),
)
.arg(Arg::with_name("data").help(
"hex bytes to decode by the selected architecture. for example, try -a x86_64 33c0c3",
));
let matches = app.get_matches();
let arch_str = matches.value_of("arch").unwrap_or("x86_64");
let buf: Vec<u8> = match matches.value_of("data") {
Some(data) => match hex::decode(data) {
Ok(buf) => buf,
Err(e) => {
eprintln!("Invalid input, {}. Expected a sequence of bytes as hex", e);
return;
}
},
None => {
let mut v = Vec::new();
match matches.value_of("file") {
Some(name) => match File::open(name) {
Ok(mut f) => {
f.read_to_end(&mut v).expect("can read the file");
v
}
Err(e) => {
eprintln!("error opening {}: {}", name, e);
return;
}
},
None => {
eprintln!("data must be provided by either an argument consisting of hex bytes, or by the --file argument.");
return;
}
}
}
};
let verbose = matches.occurrences_of("verbose") > 0;
match arch_str {
"x86_64" => decode_input::<yaxpeax_x86::long_mode::Arch>(&buf, verbose),
"x86:32" => decode_input::<yaxpeax_x86::protected_mode::Arch>(&buf, verbose),
"ia64" => decode_input::<yaxpeax_ia64::IA64>(&buf, verbose),
"avr" => decode_input::<yaxpeax_avr::AVR>(&buf, verbose),
"armv7" => decode_input::<yaxpeax_arm::armv7::ARMv7>(&buf, verbose),
"armv8" => decode_input::<yaxpeax_arm::armv8::a64::ARMv8>(&buf, verbose),
"mips" => decode_input::<yaxpeax_mips::MIPS>(&buf, verbose),
"msp430" => decode_input::<yaxpeax_msp430::MSP430>(&buf, verbose),
"pic17" => decode_input::<yaxpeax_pic17::PIC17>(&buf, verbose),
"pic18" => decode_input::<yaxpeax_pic18::PIC18>(&buf, verbose),
"m16c" => decode_input::<yaxpeax_m16c::M16C>(&buf, verbose),
// "pic24" => decode_input::<yaxpeax_pic24::PIC24>(buf),
other => {
let seg_idx = arch_str.find(|c| c == '+' || c == '-').unwrap_or(arch_str.len());
let wps = |base| with_parsed_superh(base, &arch_str[seg_idx..],
|decoder| decode_input_with_decoder::<yaxpeax_superh::SuperH>(decoder, &buf, verbose));
match &arch_str[0..seg_idx] {
"sh" => wps(yaxpeax_superh::SuperHDecoder::SH1),
"sh2" => wps(yaxpeax_superh::SuperHDecoder::SH2),
"sh3" => wps(yaxpeax_superh::SuperHDecoder::SH3),
"sh4" => wps(yaxpeax_superh::SuperHDecoder::SH4),
"j2" => wps(yaxpeax_superh::SuperHDecoder::J2),
_ => println!("unsupported architecture: {}", other),
}
}
}
}
fn with_parsed_superh<F: FnOnce(yaxpeax_superh::SuperHDecoder)>(
mut based_on: yaxpeax_superh::SuperHDecoder, mut from: &str, func: F
) {
let mut features = based_on.features.iter().copied().collect::<BTreeSet<_>>();
while !from.is_empty() {
// This would be Not Trash if split_inclusive were stable; alas
let op = from.chars().next().unwrap();
from = &from[1..];
let next_feat_idx = from.find(|c| c == '+' || c == '-').unwrap_or(from.len());
let feat = &from[0..next_feat_idx];
from = &from[next_feat_idx..];
match (op, feat) {
('+', "be") => based_on.little_endian = false,
('-', "be") => based_on.little_endian = true,
('+', "f64") => based_on.fpscr_sz = true,
('-', "f64") => based_on.fpscr_sz = false,
('+', "mmu") => { features.insert(yaxpeax_superh::SuperHFeature::MMU); },
('-', "mmu") => { features.remove(&yaxpeax_superh::SuperHFeature::MMU); },
('+', "fpu") => { features.insert(yaxpeax_superh::SuperHFeature::FPU); },
('-', "fpu") => { features.remove(&yaxpeax_superh::SuperHFeature::FPU); },
('+', "j2") => { features.insert(yaxpeax_superh::SuperHFeature::J2); },
('-', "j2") => { features.remove(&yaxpeax_superh::SuperHFeature::J2); },
pair => panic!("Who is {:?} and why was it not caught at parse time?", pair),
}
}
func(yaxpeax_superh::SuperHDecoder {
features: &features.into_iter().collect::<Vec<_>>()[..],
..based_on
})
}
fn decode_input<A: Arch>(buf: &[u8], verbose: bool)
where
A::Instruction: fmt::Display,
{
decode_input_with_decoder::<A>(A::Decoder::default(), buf, verbose);
}
fn decode_input_with_decoder<A: Arch>(decoder: A::Decoder, buf: &[u8], verbose: bool)
where
A::Instruction: fmt::Display,
{
let start = A::Address::zero();
let mut addr = start;
loop {
match decoder.decode(buf[addr.to_linear()..].iter().cloned()) {
Ok(inst) => {
println!(
"{:#010x}: {:14}: {}",
addr.to_linear(),
hex::encode(
&buf[addr.to_linear()..]
[..A::Address::zero().wrapping_offset(inst.len()).to_linear()]
),
inst
);
if verbose {
println!(" {:?}", inst);
if !inst.well_defined() {
println!(" not well-defined");
}
}
addr += inst.len();
}
Err(e) => {
println!("{:#010x}: {}", addr.to_linear(), e);
addr += A::Instruction::min_size();
}
}
if addr.to_linear() >= buf.len() {
break;
}
}
}
|
