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https://github.com/kuninoto/42_libasm

Introduction to ASM. Some libc functions implemented in x86_64 ASM with Intel Syntax
https://github.com/kuninoto/42_libasm

1337-libasm 1337school 42-libasm 42-school 42libasm asm assembly assembly-language assembly-x86 libasm libc x86-64

Last synced: about 1 month ago
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Introduction to ASM. Some libc functions implemented in x86_64 ASM with Intel Syntax

Host: GitHub
URL: https://github.com/kuninoto/42_libasm
Owner: Kuninoto
License: gpl-3.0
Created: 2023-09-17T18:49:38.000Z (over 1 year ago)
Default Branch: master
Last Pushed: 2023-10-04T22:00:38.000Z (about 1 year ago)
Last Synced: 2023-10-05T08:44:46.643Z (about 1 year ago)
Topics: 1337-libasm, 1337school, 42-libasm, 42-school, 42libasm, asm, assembly, assembly-language, assembly-x86, libasm, libc, x86-64
Language: C
Homepage:
Size: 1.31 MB
Stars: 0
Watchers: 1
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md
- License: LICENSE

Awesome Lists containing this project

README

        # libasm (42Porto - 42Cursus)   

## Grade: 100/100

### Overview

A few string manipulation functions and libc system call wrappers written in Assembly x86_64 with the Intel syntax

### Installing and running the project:

1- Clone this repository

	

	git clone https://github.com/Kuninoto/42_libasm

2- Navigate to _libasm_ and run `make`

	

	cd 42_libasm/libasm && make

3- `make clean` so that you don't keep those object files that you won't need anymore

	make clean

4- Compile your programs with your new _libasm.a_

	Example (C): cc -Wall -Wextra -Werror main.c libasm.a

###  Subject (v5): [libasm en_subject](./extras/en.subject_libasm.pdf)

#### Makefile Available Targets:  

`make` or `make all` - Makes _libasm.a_  

`make clean` - Deletes all the resulting object files  

`make fclean` - Deletes _libasm.a_ and all the resulting object files  

`make re` - Deletes everything (object files and _libasm.a_) and rebuilds _libasm.a_

#### Adding new functions to this library:

  - Add their prototypes to _libasm.h_

  - Add their source files to /libasm

  - Add their source file names to the "GENERAL" variable inside the Makefile   

  - Rebuild the library with `make re`

##### To keep track of what's inside your resulting _libasm.a_ run `ar -t libasm.a` 

## Useful links

[You Can Learn Assembly in 10 Minutes (it’s easy)](https://www.youtube.com/watch?v=jPDiaZS-2ok)  

[How do I know what registers function parameters will be mapped on?](https://stackoverflow.com/questions/28728742/how-do-i-know-what-registers-function-parameters-will-be-mapped-on)  

[Syscalls(2) man page](https://linux.die.net/man/2/syscalls)  

[Linux System Call Table for x86_64](http://blog.rchapman.org/posts/Linux_System_Call_Table_for_x86_64/)  

[x64 ASM Cheat Sheet](https://cs.brown.edu/courses/cs033/docs/guides/x64_cheatsheet.pdf)  

[NASM tutorial](https://cs.lmu.edu/~ray/notes/nasmtutorial/)  

[How does push and pop work in assembly](https://stackoverflow.com/questions/26026174/how-does-push-and-pop-work-in-assembly)  

[CPU Registers x86](https://wiki.osdev.org/CPU_Registers_x86)  

[Godbolt](https://godbolt.org/)  

---

Made by Nuno Carvalho (Kuninoto) | [email protected]