From 4357d69df98aa1b1de5f94a62fcdc77f6fa1a8c9 Mon Sep 17 00:00:00 2001
From: iximeow <me@iximeow.net>
Date: Sat, 11 Jan 2020 15:20:49 -0800
Subject: good morning

---
 src/main.rs | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 src/main.rs

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..3a9fef4
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,81 @@
+use yaxpeax_arch::{Address, Arch, Decoder, Instruction, LengthedInstruction};
+
+use clap::{Arg, App};
+use num_traits::identities::Zero;
+
+use std::fmt;
+
+fn main() {
+    let matches = App::new("yaxpeax disassembler")
+        .version("0.0.1")
+        .author("iximeow <me@iximeow.net>")
+        .about("disassembly tool using yaxpeax decoders")
+        .arg(Arg::with_name("arch")
+             .short("a")
+             .long("architecture")
+             .takes_value(true)
+             .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")
+             .index(1))
+        .get_matches();
+
+    let arch_str = matches.value_of("arch").unwrap_or("x86_64");
+    eprintln!("disassembling as {}", arch_str);
+//    let file = matches.value_of("file").unwrap();
+    let buf: &str = matches.value_of("data").unwrap_or("");
+    let verbose = matches.occurrences_of("verbose") > 0;
+
+    match arch_str {
+        "x86_64" => decode_input::<yaxpeax_x86::x86_64>(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_mc::MSP430>(buf, verbose),
+        "pic17" => decode_input::<yaxpeax_pic17::PIC17>(buf, verbose),
+        "pic18" => decode_input::<yaxpeax_pic18::PIC18>(buf, verbose),
+//        "pic24" => decode_input::<yaxpeax_pic24::PIC24>(buf),
+        other => {
+            println!("unsupported architecture: {}", other);
+        }
+    }
+}
+
+fn decode_input<A: Arch>(buf: &str, verbose: bool) where A::Instruction: fmt::Display {
+    let buf = match hex::decode(buf) {
+        Ok(buf) => buf,
+        Err(e) => {
+            eprintln!("Invalid input, {}. Expected a sequence of bytes as hex", e);
+            return;
+        }
+    };
+    let decoder = A::Decoder::default();
+    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()..][..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); break; },
+        }
+        if addr.to_linear() >= buf.len() {
+            break;
+        }
+    }
+}
-- 
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