gas: too many memory reference

Question

When compiling the following instruction:

movl 4(%ebp), 8(%ebp)

I got: too many memory reference.

What's wrong with it?

Answer 1

The number before the parenthesis is a byte offset (which causes a memory reference to occur), and you cannot have two of them with movl. You need to move the value temporarily to a register first.

movl 4(%ebp), %ecx
movl %ecx, 8(%ebp)

Answer 2

It is not a legal instruction. For most instructions that reference memory you must move it to/from a register.

Answer 3

xpath2.0의 "NoFollow"> 색소폰 를 사용할 수 있습니다.Xalan은 그것을 위해 프로토 타입을 가지고 있지만 이것은 공식 빌드, http://www.stylusstudio.com/xsllist/200212/post70030.html.