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use std::io::Read;
use std::ffi::CStr;
unsafe extern "C" {
fn decode_op(address: u32, op: u32, str: *mut u8, len: u32) -> i32;
}
fn rpcs3_dis(address: u32, code: u32) -> Option<String> {
let mut instr_str = [0u8; 128];
let res = unsafe { decode_op(address, code, instr_str.as_mut_ptr(), instr_str.len() as u32) };
if res != 0 {
return None;
}
let cstr = unsafe { CStr::from_ptr(instr_str.as_ptr() as *const _) };
let s = cstr.to_str().expect("can unwrap");
Some(s.to_string())
}
pub fn main() {
let mut args = std::env::args();
args.next().expect("exists");
let hex0 = args.next().expect("byte 0");
if hex0.trim() == "-" {
dis_stdin();
return;
}
let hex1 = args.next().expect("byte 1");
let hex2 = args.next().expect("byte 2");
let hex3 = args.next().expect("byte 3");
let bs: [u8; 4] = [
u8::from_str_radix(&hex0, 16).expect("byte 0 parses"),
u8::from_str_radix(&hex1, 16).expect("byte 1 parses"),
u8::from_str_radix(&hex2, 16).expect("byte 2 parses"),
u8::from_str_radix(&hex3, 16).expect("byte 3 parses"),
];
dis_bytes(bs);
}
fn dis_stdin() {
let mut buf = Vec::new();
std::io::stdin().read_to_end(&mut buf).expect("can read");
for i in 0..buf.len() / 4 {
let bs: [u8; 4] = buf[i * 4..][..4].try_into().expect("four bytes");
dis_bytes(u32::from_le_bytes(bs).to_be_bytes());
}
}
fn dis_bytes(bs: [u8; 4]) {
let word = u32::from_be_bytes(bs);
if let Some(ok) = rpcs3_dis(0x00000004, word) {
println!("{}", ok.as_str());
} else {
println!(".long 0x{:08x}", word);
}
}
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