shannarra / my_libasm

A university project consisting of creating some important STDC functions in x86_64 ASM.

my_libasm

A university project consisting of creating some important STDC functions in x86_64 ASM.

Contents

This repo implements a couple of STDC functions in pure assembly and calls them over in c. The functions implemented are:

[STDC name] -> project name

• strlen -> my_strlen

• strchr -> my_strchr

• memset -> my_memset

• memcpy -> my_memcpy

• strcmp -> my_strcmp

• memmove -> my_memmove

• strncmp -> my_strncmp

• strcasecmp -> my_strcasecmp

• index -> my_index

• read -> my_read

• write -> my_write

Prerequisites

You will need:

• Netwide Assembler (nasm) and a 64-bit processor (duuh...)
• gcc, I am using 9.4.0 as of writing this project readme.
• make

Running:

Just run

make re && ./my_libasm

Note that "re" is optional and is useful if you want to rebuild every time you run the app. Useful for development.

Authors and contributing

Petar Angelov (Shannarra).

If you want to contribute to this project just open a PR with your changes.