smirn0v · April 30, 2013 20:30
diff --git a/msg send nil self b/msg send nil self
 // message sent to nil: redirect to nil receiver, if any
 LMsgSendNilSelf:
  call	1f			// load new receiver
 1:	popl	%edx
 	movl	__objc_nilReceiver-1b(%edx),%eax
 	testl	%eax, %eax		// return nil if no new receiver
 	je	LMsgSendReturnZero
 	movl	%eax, self(%esp)	// send to new receiver
 	jmp	LMsgSendReceiverOk	// receiver must be in %eax
	// message sent to nil: redirect to nil receiver, if any
	LMsgSendNilSelf:
	call 1f // load new receiver
	1: popl %edx
	movl __objc_nilReceiver-1b(%edx),%eax
	testl %eax, %eax // return nil if no new receiver
	je LMsgSendReturnZero
	movl %eax, self(%esp) // send to new receiver
	jmp LMsgSendReceiverOk // receiver must be in %eax