/libasm

42 libasm project - recreate basic functions in assembly

Primary LanguageAssembly

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libasm

The aim of this project is to get familiar with assembly language.

Technical considerations

  • The project is written in 64 bits ASM, compiled with NASM

  • It follows the Intel syntax

  • The following functions are rewritten in assembly:

    • ft_strlen: calculate the length of a string
    • ft_strcpy: copy a string
    • ft_strcmp: compare two strings
    • ft_write: write to a file descriptor
    • ft_read: read from a file descriptor
    • ft_strdup: duplicate a string

  • Errors during syscalls need to be checked and Errno to be set properly

wiki

  • You can check my learnings on assembly on this wiki page

How to test

Disclaimer: This repo provides two versions (Linux & MacOS), due to differences between these two operation systems. Choose the version to test based on your OS.

Run the following commands to test:

$ cd Desktop && git clone https://github.com/qingqingqingli/libasm.git

# for linux
$ cd libasm/linux_libasm
$ make && gcc -no-pie main.c libasm.a && ./a.out

# for macOS
$ cd libasm/mac_libasm
$ make && gcc main.c libasm && ./a.out

Test result example

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