Method to_elf_with_entry

crates/asm-to-binary/src/assembler/output.rs:221–223

Like `to_elf` but tries `entry_symbol` first before the default fallbacks. Use this for freestanding builds whose entry point is not `_start`.

(&self, load_base: u64, entry_symbol: &str)

    /// label, blank, and comment lines resolve to the code that follows them.
    pub fn addr_for_source_at_or_after(&self, file: &str, line: u32) -> Option<u64> {
        let file_id = self.file_table.iter().position(|f| f == file)? as u32;
        self.line_table
            .iter()
            .filter(|e| e.file_id == file_id && e.line >= line && e.line != 0)
            .map(|e| (e.line, e.addr))
            .min()