feat: impl register and cpu

Cargo.toml

@@ -30,6 +30,9 @@ byteorder = "1.5.0"
 
 elf = { version = "0.7", default-features = false }
 
+# for debug
+prettytable-rs = "^0.8"
+
 [dev-dependencies]
 env_logger = { version = "0.9.0", default-features = false }
 keccak-hash = "0.10.0"

src/cpu/kernel/assembler.rs

@@ -34,6 +34,7 @@ pub(crate) fn combined_kernel() -> Kernel {
  let code_hash = code_hash_be.map(u32::from_be);
  log::debug!("code_hash: {:?}", code_hash);
 
+
  Kernel {
  code,
  code_hash,

src/cpu/kernel/load_elf.rs

@@ -1,5 +1,4 @@
 extern crate alloc;
-
 use alloc::collections::BTreeMap;
 
 use anyhow::{anyhow, bail, Context, Result};
@@ -8,7 +7,7 @@ pub const WORD_SIZE: usize = core::mem::size_of::<u32>();
 
 /// A MIPS program
 pub struct Program {
- /// The entrypoint of the program
+ /// The entrypoint of the program, PC
  pub entry: u32,
 
  /// The initial memory image
@@ -107,12 +106,18 @@ mod test {
  let mut buffer = Vec::new();
  reader.read_to_end(&mut buffer).unwrap();
  let max_mem = 0x40000000;
- let _p = Program::load_elf(&buffer, max_mem).unwrap();
- /*
- log::debug!("entry: {}", p.entry);
- p.image.iter().for_each(|(k, v)| {
- log::debug!("{}: {}", k, v);
- })
- */
+ let p = Program::load_elf(&buffer, max_mem).unwrap();
+ println!("entry: {}", p.entry);
+ let mut entry = p.entry;
+ let mut step = 0;
+ loop {
+ println!("{}: {}", step, entry);
+ if ! p.image.contains_key(&entry) {
+ break;
+ }
+ entry = p.image[&entry];
+ step += 1;
+ }
+ println!("Done");
  }
 }