Macro-writing challenge

Write a macro check-arguments-non-nil to be used in function definitions, that would expand to assertion about every argument being non-nil.
The intended usage of this macro:

(defun foo (a b c d)
(check-arguments-non-nil)
foo-body)

This should expand to:

(defun foo (a b c d)
(assert (and (not (null a)) (not (null b)) (not (null c)) (not (null d)))
(a b c d)
"Null argument in FOO")
foo-body)

The macro must work whatever the number and names of the function parameters.

>>42
Yes you can. >>41's "often" means shit Lispers who just took a course in Scheme in school and don't know what they're doing.

(defmacro runmacro (macro &rest args)
`(,macro ,@args))

Of course, this is an exploded form to be more descriptive. It is effectively a no-op that degenerates to (defmacro runmacro (&rest form) form).