x86 Assembly pushl/popl don't work with “Error: suffix or operands invalid”

Question

I\'m a newbie to assembly programming, working through Programming Ground Up on an Ubuntu x86_64 desktop with GNU assembler v2.20.1.

I\'ve been able to assemble/link

Answer 1

I recently started following these examples too, I found the following worked:

1. Add .code32 to the top of your assembly code
2. Assemble with the --32 flag
3. Link with the -m elf_i386 flag

You can see my example here