asterisks, dollar signs and percent signs!

Hello, I am trying to use m4 to write assembly language macros.

My first effort is almost working but I can't get the last part to work.

Here is what I have so far.

define(entry,`
       .section .text,"ax"
       .align 4

       .globl main
       .type main,@function
       .align 16
main:
	enter `$'0x10,`$'0
	pushl %ebx
	pushl %esi
	pushl %edi'
      )dnl

define(exit,`
        popl %edi
	popl %esi
	popl %ebx
	
	leave
	ret'
      )dnl


	entry

	call printf

	exit

This works as desired except I want to change the macro names to $entry and
$exit. I can't figure out how to quote the names or what I am doing wrong,
it produces no output or produces wrong output and loops depending on
what I try. I would like to be able to create a $main macro but main: is a
text token in the definition and I also have problems with that. I looked
over the manual and I obviously missed something. Thanks for any help and
sorry if this is a stupid question.