I'm studying x86-64 NASM and here is current situation: These codes are for education only, not for running on client-facing system or so. RCX holds loop count, between 1 and 1000. At the beginnin...

I am a little bit confused by how movzx behaves in the following example. (Please note that I am assuming the print_int function used in my code sample works and the problem is not there but in my ...

I am trying to compile and link my first program on Assembler. I try to compile the following code: ; %include "stud_io.inc" global _main section .text _main: xor eax, eax again: ; PRINT "He...

When compiling below code: global main extern printf, scanf section .data msg: db "Enter a number: ",10,0 format:db "%d",0 section .bss number resb 4 section .text main: mov rdi, msg mov a...

I am attempting to write a simple assembly program in NASM on Windows that includes a loop and calls the ExitProcess function from the Windows API. I've successfully assembled the code using NASM, ...

There is a recent publication at nature.com, Faster sorting algorithms discovered using deep reinforcement learning, where it talks about AlphaDev discovering a faster sorting algorithm. This caugh...

I am looking for a way to print an integer in assembler (the compiler I am using is NASM on Linux), however, after doing some research, I have not been able to find a truly viable solution. I was a...

I have read this, this, and this yet to find what it is I want. Firstly, I understand the difference between lea and mov in terms of the result they can achieve, put simply: mov eax, ebp ;put the v...

I'm trying to create a simple make file, the commands I'm using now are: $ nasm -f elf64 main.asm $ ld -s -o test1 main.o That's it. How can I create a Makefile from them? I've read the manuals ...

I am trying to call a function - that should have an absolute address when compiled and linked - from machine code. I am creating a function pointer to the desired function and trying to pass that ...

I want to print a float value with printf global main extern printf section .data string: db `%f\n`, 0 section .bss rs: resq 1 [...] movq xmm0, [rs] mov rdi, string mov rax, 0 call print...

I'm not trying to prompt an Intel vs AT&T war (moot point anyway, now that they both support Intel syntax) or ask which one is "better" per se, I just want to know the practical differences in ...

I have spent a few years coding in C and Java. I enjoy how I can make a program display a message box or perform some file operations and it works on every (I think?) CPU without any dramas. Althou...

I've been trying to learn assembly lately, and came across this post. The author used NASM and Microsoft linker to set up the assembly working environment. I followed the same steps and installed N...

I am trying to print a string in Q Emulator using NASM. My code is as below: mov bx,HELLO mov ah, 0x0e int 0x10 HELLO: db 'Hello', 0 jmp $ times 510-($-$$) db 0 dw 0xaa55 However when I compile...

I'm assembling an x86-64 program on Ubuntu with NASM: nasm -f elf64 -g -F dwarf -o foo.o foo.asm ld -o foo foo.o Source: section .text global _start _start: mov rax, 60 ;SYS_exit mov rdi, 0 ;EX...

I am new to assembly. I am trying to do this: SECTION .data SECTION .bss SECTION .text global _start _start: nop mov rax, 067FEh mov bx, ax mov cl, bh mov ch, bl nop Everytime I ru...

I really dislike the GNU Assembler syntax and I some existing code written with NASM syntax that would be quite painful and time consuming to port. Is it possible to make the global_asm!() macro us...

can anyone give me a comprehensive description about ORG directive? When and why is it used in assembly written applications? Using Nasm on x86 or AMD64.

I am in the process of making a bootloader as a way for me to learn assembly. I have looked into using sections to organize and optimize my code, but one thing that doesn't work is when I call my p...

message db "Enter a digit ", 0xA,0xD Length equ $- message Is it used to get the length of a string? How does it work internally?

I have an assembler file I want to compile in one run. However, the following code fails: enable_language(ASM_NASM) set(CMAKE_ASM_NASM_FLAGS "${CMAKE_ASM_NASM_FLAGS} -f bin") add_executable(test t...

Starting to learn assembly, I was given some Hello World assembly code created during the class on Linux. I would like to get it to work for 64-bit Mac OS X. code.asm: SECTION .data hola: db "H...

section.text: global _start _start: mov ebx, 1 mov eax, 4 mov ecx, msg1 mov edx, len1 int 0x80 mov eax, 1 ; exit mov ebx, 0 int 0x80 section.data: msg1: db "Hello world"...

I'm going through the Intel processor documentation and writing some basic assembly code at the same time. I have both nasm and as (GAS) on my server and I understand the basic differences of both ...