Category:Assembler

References

• Jonathan Bartlett: Programming from the Ground Up - excellent GNU assembler tutorial (AT&T syntax)
• Linux System Call Table

Topics

• GNU Assembler (Gas) employs the AT&T assembler syntax on x86 - includes a 'hello world' program
• Assembler Function Calls
• C Hello World Disassembled
• C++ Classes Disassembled
• The Netwide Assembler (NASM) - originally by Simon "PuTTY" Tatham - employs the Intel assembler syntax on x86
• AT&T vs. Intel assembler syntax

Vim Disassembly Tip

Here's how to quickly see the assembler output of a C++ program in Vim

vim something.cpp

:set makeprg=g++\ -mpreferred-stack-boundary=2\ -S\ %
 │
 └─ Define make program (preferred-stack-boundary option disables
    stack alignment boilerplate code in assembler output)

:make
:vnew something.s
:set autoread

From this point on, you can see the assembler equivalent of your C++ code by running :make.

You can mark places in the code by writing something like this in your C++ code:

asm("MarkedPlace:");