c-mixv.s

来自「一个编译器的例子,基于c语言,在linux下开发 现在了简单的c语言例子」· S 代码 · 共 64 行

				# start of the file
.include "defines.h"		# system call numbers
.include "c-mixv.literals"	# include the string literal file
	.global _start	
	.bss
	.align	4
_data:
	.skip		8	# global variables' size
.text
	.align	4
_start:
	pushl %ebp		# save the ebp address
	movl %esp, %ebp
	movl $45, _data+0
	pushl %eax
	popl %eax
	movl $77, _data+4
	pushl %eax
	popl %eax
	subl $8, %esp		# allocate space for local variables
	movl $1078530012, -4(%ebp)
	pushl %eax
	popl %eax
	movl $10, -8(%ebp)
	pushl %eax
	popl %eax
	movl $SYS_write, %eax	# load the write call number
	movl $STDOUT, %ebx		# get the output channel
	movl $literal0,%ecx		# get the literal string
	movl $len0,%edx		# string length
	int $0x80
	movl _data+0,%eax		# get the integer value of the ID
	call ishow
	movl $SYS_write, %eax	# load the write call number
	movl $STDOUT, %ebx		# get the output channel
	movl $literal1,%ecx		# get the literal string
	movl $len1,%edx		# string length
	int $0x80
	movl _data+4,%eax		# pass the char
	call cshow
	movl $SYS_write, %eax	# load the write call number
	movl $STDOUT, %ebx		# get the output channel
	movl $literal2,%ecx		# get the literal string
	movl $len2,%edx		# string length
	int $0x80
	flds -4(%ebp)
	call fshow
	movl $SYS_write, %eax	# load the write call number
	movl $STDOUT, %ebx		# get the output channel
	movl $literal3,%ecx		# get the literal string
	movl $len3,%edx		# string length
	int $0x80
	movl -8(%ebp),%eax		# get the integer value of the ID
	call ishow
	call newline
	pushl $0
	popl %eax		# save the return value in eax
	movl %ebp, %esp
	popl %ebp		# restore the ebp address
	movl $SYS_exit,%eax	# load the exit call number
	movl $0,%ebx		# load the exit code
	int $0x80		# and exit!
				# end of the file