-*-Mode : LISP ; Package : CCL -*-
;;;
;;; Copyright 2010 Clozure Associates
;;;
  Licensed under the Apache License , Version 2.0 ( the " License " ) ;
;;; you may not use this file except in compliance with the License.
;;; You may obtain a copy of the License at
;;;
;;;     -2.0
;;;
;;; Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an " AS IS " BASIS ,
;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;;; See the License for the specific language governing permissions and
;;; limitations under the License.

(in-package "CCL")

(defun make-callback-trampoline (index &optional info)
  (declare (ignore info))
  (let* ((p (%allocate-callback-pointer 16)))
    (macrolet ((arm-lap-word (instruction-form)
                 (uvref (uvref (compile nil `(lambda (&lap 0) (arm-lap-function () ((?? 0)) ,instruction-form))) 1) 0)))
      (setf (%get-unsigned-long p 0)
            (dpb (ldb (byte 8 0) index)
                 (byte 8 0)
                 (arm-lap-word (mov r12 (:$ ??))))
            (%get-unsigned-long p 4)
            (dpb (ldb (byte 8 8) index)
                 (byte 8 0)
                 (dpb 12 (byte 4 8)
                      (arm-lap-word (orr r12 r12  (:$ ??)))))
            (%get-unsigned-long p 8)
            (arm-lap-word (ldr pc (:@ pc (:$ -4))))
            (%get-unsigned-long p 12)
            (%lookup-subprim-address #.(subprim-name->offset '.SPeabi-callback)))
      (ff-call (%kernel-import #.arm::kernel-import-makedataexecutable) 
               :address p 
               :unsigned-fullword 16
               :void)
      p)))
                    

 Package : CCL -*-

 Copyright 2010 Clozure Associates


 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

     -2.0

 Unless required by applicable law or agreed to in writing, software
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
  distributed under the License is distributed on an " AS IS " BASIS ,

(in-package "CCL")

(defun make-callback-trampoline (index &optional info)
  (declare (ignore info))
  (let* ((p (%allocate-callback-pointer 16)))
    (macrolet ((arm-lap-word (instruction-form)
                 (uvref (uvref (compile nil `(lambda (&lap 0) (arm-lap-function () ((?? 0)) ,instruction-form))) 1) 0)))
      (setf (%get-unsigned-long p 0)
            (dpb (ldb (byte 8 0) index)
                 (byte 8 0)
                 (arm-lap-word (mov r12 (:$ ??))))
            (%get-unsigned-long p 4)
            (dpb (ldb (byte 8 8) index)
                 (byte 8 0)
                 (dpb 12 (byte 4 8)
                      (arm-lap-word (orr r12 r12  (:$ ??)))))
            (%get-unsigned-long p 8)
            (arm-lap-word (ldr pc (:@ pc (:$ -4))))
            (%get-unsigned-long p 12)
            (%lookup-subprim-address #.(subprim-name->offset '.SPeabi-callback)))
      (ff-call (%kernel-import #.arm::kernel-import-makedataexecutable) 
               :address p 
               :unsigned-fullword 16
               :void)
      p)))
                    
