soaresfabricio / x86-control-unit Goto Github PK

As part of a homework assignment for my Computer Architecture course, I was asked to develop a small control unit simulator capable of running some self-created assembly language. I started it up with a GAS inspired syntax and later decided to build a full parser around it.

• 7 registers: "eax", "ebp", "esp", "eip", "edx", "ebx" and "ecx";
• 20 opcodes: "addl", "andl", "leave", "movl", "pushl", "ret", "subl", "cmpl", "incl", "jg", "jle", "jmp", "leal", "call", "sall", "decl", "imull", "nop", "jl", "jge";
• Dumping of stack (memory) and register to .txt files by the end of execution;
• Counting of the number of cycles.

You must have cmake and a C++ compiler installed. cd into the folder that contains this cloned repository and run the following command on a terminal:

$ cmake .

Although some examples are to be found on the samples folder, you can easily use some piece of C code and a C compiler (like GCC) to generate some assembly that will (most likely) run on this simulator. For a file named input.c, this can be done through the following command:

gcc -S -m32 -fno-leading-underscore input.c

-m32 generates code with only x86 opcodes and -fno-leading-underscore will remove underscore from the beginning of directives and labels (some compilers may have it turned on by default).

Have fun!