Input and Output Through Assembly

This project demonstrates how to access and handle input and output operations using assembly language. The project includes an assembly file, a C program for testing, and a makefile for building the project.

Project Structure

• echo.s: The assembly source file containing the implementation of input and output operations.
• echo.syms: Symbol file for the assembly program.
• echoc.c: A C program that interacts with the assembly code to perform I/O operations.
• syms: Additional symbols required by the assembly code.
• makefile: Makefile for building the project.

Prerequisites

• GCC (GNU Compiler Collection)
• Make utility

Building the Project

To build the project, navigate to the project directory and run the following command:

make

This will compile the assembly and C code, linking them together to create an executable.

Running the Program

After building the project, you can run the executable to see the input and output operations in action:

./echo

File Descriptions

echo.s

The echo.s file contains the assembly code that handles input and output operations. This includes reading from standard input and writing to standard output.

echo.syms

The echo.syms file includes symbols that are referenced by the assembly code in echo.s.

echoc.c

The echoc.c file is a C program that demonstrates how to call the assembly functions defined in echo.s. It provides a simple interface to test the I/O functionality.

syms

The syms file contains additional symbols required by the assembly code.

makefile

The makefile automates the build process, compiling the assembly and C source files, and linking them to produce the final executable.

Example Usage

The following example shows how to compile and run the program:

make
./echo

You will be prompted to enter input, which will be processed by the assembly code and then echoed back to the standard output.