Questions tagged [nasm]
NASM is the Netwide Assembler, an open-source x86/x64 assembler. It aims at being portable, modular and at having a simple syntax.
25 questions
1
vote
1
answer
86
views
An example of a bootloader that changes color in a loop in assembly x86
In short, this bootloader code loads sectors from the disk into memory, sets the video mode and prints a message on the screen. After that, it goes into an infinite loop, keeping the system running.
<...
6
votes
1
answer
634
views
x86 assembly program to compute some random function
As a way to refresh my knowledge on assembly, I tried to compile the below C program to x86 assembly by hand.
...
- 255
3
votes
2
answers
145
views
Functions to simplify printing strings and numbers in amd64 Assembly
I'm new to Assembly, and this is my very first "project" in Assembly. I wanted to store data (numbers) on the stack, then access and display them. Eventually, this "experiment" of ...
- 31
3
votes
1
answer
196
views
`strdup` re-implementation in assembly
I am posting a message here because I am new to assembly programming. My goal today was to re-code strdup in assembly, so to save my first parameter which is a ...
- 31
4
votes
2
answers
305
views
Print decimal integer
This is an x86-64 Linux program to print a non-negative decimal integer. I would appreciate any simple optimizations for size and readability. I am aware that division by a constant is usually done by ...
- 1,233
-1
votes
2
answers
142
views
Optimizing Netwide Assembler codes in Microsoft Windows
I am a novice in assembler programing, I will will appreciate if someone could review these NASM assembler code for me. Is about encoder decoder.
The encoder performs the following:
pads the ...
- 11
3
votes
1
answer
1k
views
"Hello world" in x64 assembly for Windows - Shadow space / Stack alignment
I`m currently trying to delve into x64 assembly under windows using NASM, and created a minimalistic "Hello World" application.
It is mainly meant as an educational resource for me and ...
- 98
1
vote
1
answer
383
views
File dump in assembly
This is a file dump program written in assembly that displays 320 bytes at a time in 20 lines.
It shows the hex code for each character and also the string
At the start of the program it asks for the ...
- 71
6
votes
1
answer
454
views
Assembler. Algorithm for incrementing a decimal number
I share an algorithm that I have written myself. It is useful for incrementing any digit of a decimal number. That way, a conversion to decimal is not necessary.
Please excuse the mistakes. I am ...
- 63
5
votes
2
answers
1k
views
x86_64 nasm criticism on malloc and free implementation
I have made my own malloc implementation using this resource as a guide
https://danluu.com/malloc-tutorial/
I was hoping to receive some feed back on how I can improve upon it, and If I did any major ...
- 419
1
vote
1
answer
133
views
Criticism on x86_64 nasm printBigInt and bigPow implementation
The first "method" I have coded is _bigPow which can pow(x, y) on any number which is really big. And the _printBigInt prints a very big integer. Plus I have tried to comment most parts of ...
- 419
6
votes
1
answer
534
views
CodeWars - Assembly Language - Check List For Value
I'm doing assembly language problems on CodeWars, a website with practice problems.
Problem
https://www.codewars.com/kata/545991b4cbae2a5fda000158/train/nasm
Create a method that accepts a list and ...
- 1,445
4
votes
2
answers
399
views
Criticism on x86_64 nasm assembly strToInt and printInt implementation
I am pretty new to assembly I would like criticism on two "methods" I have written. One converts string to int and the other prints an int to stdout. Any advise helps out.
...
- 419
2
votes
2
answers
172
views
Exponentiation by squaring in x64 Linux Assembly
I am learning some assembly for a compiler project I am working on and I have come across the Exponentiation by Squaring algorithm when it came to calculating x ^ n. To get a grasp on how the ...
- 63
5
votes
1
answer
136
views
Hailstone Sequence in NASM
For practice, I wrote some NASM code that prints out the hailstone sequence of a (unfortunately, hardcoded) number.
This is by far the most complex code I've ever written in NASM. I'd like advice on ...
- 16.6k