45 lines
1.3 KiB
Rust
45 lines
1.3 KiB
Rust
|
use mlua::prelude::*;
|
||
|
|
|
||
|
|
pub fn link(
|
||
|
|
symrt: LuaTable,
|
||
|
|
symtab: LuaTable,
|
||
|
|
labels: &[Option<usize>],
|
||
|
|
code: &mut [u8],
|
||
|
|
out: &mut impl std::io::Write,
|
||
|
|
) -> mlua::Result<()> {
|
||
|
|
for item in symrt.pairs::<usize, LuaTable>() {
|
||
|
|
let (loc, val) = item?;
|
||
|
|
let size: usize = val.get("size")?;
|
||
|
|
let dest = labels
|
||
|
|
.get(
|
||
|
|
match val.get::<_, LuaValue>("label")? {
|
||
|
|
LuaValue::Integer(i) => i,
|
||
|
|
LuaValue::String(s) => symtab.get(s)?,
|
||
|
|
_ => {
|
||
|
|
return Err(mlua::Error::runtime(
|
||
|
|
"Invalid symbol type (int or string expected)",
|
||
|
|
))
|
||
|
|
}
|
||
|
|
} as usize
|
||
|
|
- 1,
|
||
|
|
)
|
||
|
|
.copied()
|
||
|
|
.flatten()
|
||
|
|
.ok_or_else(|| mlua::Error::runtime("Invalid label"))?;
|
||
|
|
|
||
|
|
let loc = loc - 1;
|
||
|
|
let dest = dest - 1;
|
||
|
|
|
||
|
|
let offset = dest.wrapping_sub(loc);
|
||
|
|
match size {
|
||
|
|
4 => code[loc..loc + size].copy_from_slice(&(offset as u32).to_le_bytes()),
|
||
|
|
2 => code[loc..loc + size].copy_from_slice(&(offset as u16).to_le_bytes()),
|
||
|
|
_ => return Err(mlua::Error::runtime("Invalid symbol")),
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
dbg!(&code);
|
||
|
|
out.write_all(code)?;
|
||
|
|
Ok(())
|
||
|
|
}
|