source: trunk/source/level-1/ppc-callback-support.lisp @ 11887

Last change on this file since 11887 was 11218, checked in by gb, 11 years ago

Drop support for :MONITOR-EXCEPTION-PORTS in MAKE-CALLBACK-ROUTINE; always
use the simplest version of .SPcallback (but worry about eabi/poweropen
differences.)

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 2.5 KB
Line 
1;;;-*- Mode: Lisp; Package: CCL -*-
2;;;
3;;;   Copyright (C) 1994-2001 Digitool, Inc
4;;;   This file is part of OpenMCL. 
5;;;
6;;;   OpenMCL is licensed under the terms of the Lisp Lesser GNU Public
7;;;   License , known as the LLGPL and distributed with OpenMCL as the
8;;;   file "LICENSE".  The LLGPL consists of a preamble and the LGPL,
9;;;   which is distributed with OpenMCL as the file "LGPL".  Where these
10;;;   conflict, the preamble takes precedence. 
11;;;
12;;;   OpenMCL is referenced in the preamble as the "LIBRARY."
13;;;
14;;;   The LLGPL is also available online at
15;;;   http://opensource.franz.com/preamble.html
16
17;;; ppc-callback-support.lisp
18;;;
19;;; Support for PPC callbacks
20
21(in-package "CCL")
22
23
24
25;;; This is machine-dependent (it conses up a piece of "trampoline" code
26;;; which calls a subprim in the lisp kernel.)
27#-(and linuxppc-target poweropen-target)
28(defun make-callback-trampoline (index &optional info)
29  (declare (ignorable info))
30  (macrolet ((ppc-lap-word (instruction-form)
31               (uvref (uvref (compile nil `(lambda (&lap 0) (ppc-lap-function () ((?? 0)) ,instruction-form))) 0) #+ppc32-host 0 #+ppc64-host 1)))
32    (let* ((subprim
33            #+eabi-target
34             #.(subprim-name->offset '.SPeabi-callback)
35             #-eabi-target
36             #.(subprim-name->offset '.SPpoweropen-callback))
37           (p (%allocate-callback-pointer 12)))
38      (setf (%get-long p 0) (logior (ldb (byte 8 16) index)
39                                    (ppc-lap-word (lis 11 ??)))   ; unboxed index
40            (%get-long p 4) (logior (ldb (byte 16 0) index)
41                                    (ppc-lap-word (ori 11 11 ??)))
42                                   
43            (%get-long p 8) (logior subprim
44                                    (ppc-lap-word (ba ??))))
45      (ff-call (%kernel-import #.target::kernel-import-makedataexecutable) 
46               :address p 
47               :unsigned-fullword 12
48               :void)
49      p)))
50
51;;; In the 64-bit LinuxPPC ABI, functions are "transfer vectors":
52;;; two-word vectors that contain the entry point in the first word
53;;; and a pointer to the global variables ("table of contents", or
54;;; TOC) the function references in the second word.  We can use the
55;;; TOC word in the transfer vector to store the callback index.
56#+(and linuxppc-target poweropen-target)
57(defun make-callback-trampoline (index &optional info)
58  (declare (ignorable info))
59  (let* ((p (%allocate-callback-pointer 16)))
60    (setf (%%get-unsigned-longlong p 0) #.(subprim-name->offset '.SPpoweropen-callback)
61          (%%get-unsigned-longlong p 8) index)
62    p))
63
Note: See TracBrowser for help on using the repository browser.