luaur-code-gen 0.1.0

Native (A64/X64) code generation for Luau (Rust).
Documentation 
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use crate::functions::writeu_32::writeu_32;
use crate::functions::writeu_64::writeu_64;
use crate::records::unwind_builder_dwarf_2::UnwindBuilderDwarf2;
use crate::records::unwind_function_dwarf_2::UnwindFunctionDwarf2;

impl UnwindBuilderDwarf2 {
    pub fn start_function(&mut self) {
        // End offset is filled in later and everything gets adjusted at the end
        let mut func = UnwindFunctionDwarf2::default();
        func.begin_offset = 0;
        func.end_offset = 0;
        func.fde_entry_start_pos = (self.pos as usize - self.raw_data.as_ptr() as usize) as u32;
        self.unwind_functions.push(func);

        self.fde_entry_start = self.pos; // Will be written at the end
        unsafe {
            self.pos = writeu_32(self.pos, 0); // Length (to be filled later)
            self.pos = writeu_32(
                self.pos,
                (self.pos as usize - self.raw_data.as_ptr() as usize) as u32,
            ); // CIE pointer
            self.pos = writeu_64(self.pos, 0); // Initial location (to be filled later)
            self.pos = writeu_64(self.pos, 0); // Address range (to be filled later)
        }

        // Optional CIE augmentation section (not present)

        // Function call frame instructions to follow
    }
}