Two-Pass-Assembler

By Devesh Sangwan, Shikhar Panwar

This is a simple C++ implementation for a Two pass assembler.

Overview of the Code

pass1:

Extracts all symbols and sections.
A symbol and section table is generated and are stored in a csv file.

pass2:

Each instruction is converted to machine code.
The programs again reads the symbol table to get address and size associated with each symbol.

Other Functions:

dec_to_bin(int) : Converts the given decimal number to the Binary String
search_MOT(string) : It searchers the MOT for the Machine Operation Code and returns the index.
search_symbol_table(string) : It searches the symbol_table and returns the address of the symbol.
get_size(string) : It returns the size of the symbol/operation.
get_data(string) : It extracts data from string and converts it into its binary equivalent.
store_symbol_table() : Stores symbol table in csv format.
store_sec() : Store section table in csv.

Structures:

mnemonics : Machine Operation Table
symbol : Symbol Table
section: Section Table

Data Structures:

Vector
File Stream