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 ran into this error working through the same book. I created the following shell script (att.sh):

#!/bin/sh
as --32 $1.s -o $1
ld -melf_i386 $1.o -o $1
./$1
echo $?

Which I then made executable and ran (assuming an input file myfile.s):

chmod +x ./att.sh
./att.sh myfile