Compile run assembler in Linux

Question

I m fairly new to Linux  Ubuntu 10 04  and a total novice to assembler  I was following some tutorials and I couldn t find anything specific to Linux  So  my question is  what is a good package to compile run assembler and what are the command line commands to compile run for that package

User · Accepted Answer

The GNU assembler  gas  and NASM are both good choices  However  they have some differences  the big one being the order you put operations and their operands   gas uses AT amp T syntax  guide  https   stackoverflow com tags att info    mnemonic    source  destination   nasm uses Intel style  guide  https   stackoverflow com tags intel-syntax info    mnemonic    destination  source   Either one will probably do what you need   GAS also has an Intel-syntax mode  which is a lot like MASM  not NASM     Try out this tutorial   http   asm sourceforge net intro Assembly-Intro html  See also more links to guides and docs in Stack Overflow s x86 tag wiki

User · Answer

The GNU assembler is probably already installed on your system  Try man as to see full usage information  You can use as to compile individual files and ld to link if you really  really want to   However  GCC makes a great front-end  It can assemble  s files for you  For example     cat  gt hello s  lt  lt  EOF   section  rodata               read-only static data  globl hello hello     string  Hello  world        zero-terminated C string   text  global main main      push     rbp     mov      rsp    rbp                   create a stack frame      mov      hello   edi                  put the address of hello into RDI     call    puts                           as the first arg for puts      mov      0      eax                   return value   0   Normally xor  eax  eax     leave                                 tear down the stack frame     ret                              pop the return address off the stack into RIP EOF   gcc hello s -no-pie -o hello     hello Hello  world    The code above is x86-64   If you want to make a position-independent executable  PIE   you d need lea hello  rip    rdi  and call puts plt   A non-PIE executable  position-dependent  can use 32-bit absolute addressing for static data  but a PIE should use RIP-relative LEA    See also Difference between movq and movabsq in x86-64 neither movq nor movabsq are a good choice    If you wanted to write 32-bit code  the calling convention is different  and RIP-relative addressing isn t available    So you d push  hello before the call  and pop the stack args after      You can also compile C C   code directly to assembly if you re curious how something works     cat  gt hello c  lt  lt EOF  include  lt stdio h gt  int main void        printf  Hello  world  n        return 0    EOF   gcc -S hello c -o hello s   See also How to remove  quot noise quot  from GCC clang assembly output  for more about looking at compiler output  and writing useful small functions that will compile to interesting output

User · Answer

My suggestion would be to get the book Programming From Ground Up   http   nongnu askapache com pgubook ProgrammingGroundUp-1-0-booksize pdf  That is a very good starting point for getting into assembler programming under linux and it explains a lot of the basics you need to understand to get started

User · Answer

3 syntax  nasm  tasm  gas   in 1 assembler  yasm   http   www tortall net projects yasm

User · Answer

The assembler GNU  is as 1

User · Answer

If you are using NASM  the command-line is just  nasm -felf32 -g -Fdwarf file asm -o file o   where  file asm  is your assembly file  code  and  file o  is an object file you can link with gcc -m32 or ld -melf i386    Assembling with nasm -felf64 will make a 64-bit object file  but the hello world example below uses 32-bit system calls  and won t work in a PIE executable    Here is some more info   http   www nasm us doc nasmdoc2 html section-2 1  You can install NASM in Ubuntu with the following command   apt-get install nasm   Here is a basic Hello World in Linux assembly to whet your appetite   http   web archive org web 20120822144129 http   www cin ufpe br  if817 arquivos asmtut index html  I hope this is what you were asking

User · Answer

For Ubuntu 18 04 installnasm   Open the terminal and type   sudo apt install as31 nasm  nasm docs  For compiling and running   nasm -f elf64 example asm   assemble the program   ld -s -o example example o   link the object file nasm produced into an executable file     example   example is an executable file

User · Answer

There is also FASM for Linux    format ELF executable  segment readable executable  start  mov eax  4 mov ebx  1 mov ecx  hello msg mov edx  hello size int 80h  mov eax  1 mov ebx  0 int 80h  segment readable writeable  hello msg db  Hello World   10 0 hello size    -hello msg   It comiles with  fasm hello asm hello

[linux] Compile/run assembler in Linux?

Examples related to linux

Examples related to ubuntu

Examples related to x86

Examples related to assembly