#
# File: func1_mod.s
# Author: William T Krieger, Oct 2003
#
# My modification of the func1 test case. 
# It demonstrates a simple function call. 
# There are also global variables: initialized and not.

# data section: global vars
	.data
x:	.long 0		# x = 0
y:	.long 0		# y = 0

	.bss
z:	.long		# global var z

	.text		# start text sections: code and constants

#
# Function: _main()
# void _main()
# Demonstrates good, old reliable "Hello world". Shows how to call printf().

    .globl _main
_main:
	pushl %ebp		# enter _main()
	movl %esp, %ebp

	movl $5,x		# x = 5

	movl x,%eax		# call plus10( x)
	pushl %eax
	call plus10
	addl $4,%esp
	movl %eax,y		# y = return value

	movl %ebp, %esp	# exit _main()
	pop %ebp
	ret

#
# Function: plus10
# int plus10( int p1)
# The return value is p1+10.

	.globl plus10
plus10:
	pushl %ebp			# enter plus10()
	movl %esp, %ebp

	movl 8(%ebp),%edx	# %edx = first parameter
	addl $10,%edx		# %edx = %edx + 10
	movl %edx,%eax		# %eax = %edx, set return value

	movl %ebp, %esp		# exit plus10()
	pop %ebp
	ret