source: trunk/source/level-1/x86-callback-support.lisp @ 11187

Last change on this file since 11187 was 11187, checked in by gb, 11 years ago

Make-callback-trampoline: optional argument is count of stack argument
bytes to ignore. On x8632, store this (as word count) in upper byte
of callback index in generated trampoline function.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 2.5 KB
Line 
1;;;
2;;;   Copyright (C) 2005-2006 Clozure Associates and contributors
3;;;   This file is part of OpenMCL. 
4;;;
5;;;   OpenMCL is licensed under the terms of the Lisp Lesser GNU Public
6;;;   License , known as the LLGPL and distributed with OpenMCL as the
7;;;   file "LICENSE".  The LLGPL consists of a preamble and the LGPL,
8;;;   which is distributed with OpenMCL as the file "LGPL".  Where these
9;;;   conflict, the preamble takes precedence. 
10;;;
11;;;   OpenMCL is referenced in the preamble as the "LIBRARY."
12;;;
13;;;   The LLGPL is also available online at
14;;;   http://opensource.franz.com/preamble.html
15
16
17(in-package "CCL")
18
19
20#+x8664-target 
21(defun make-callback-trampoline (index &optional discard-stack-bytes)
22  (declare (ignore discard-stack-bytes))
23  (let* ((p (%allocate-callback-pointer 16))
24         (addr #.(subprim-name->offset '.SPcallback)))
25    (setf (%get-unsigned-byte p 0) #x41 ; movl $n,%r11d
26          (%get-unsigned-byte p 1) #xc7
27          (%get-unsigned-byte p 2) #xc3
28          (%get-unsigned-byte p 3) (ldb (byte 8 0) index)
29          (%get-unsigned-byte p 4) (ldb (byte 8 8) index)
30          (%get-unsigned-byte p 5) (ldb (byte 8 16) index)
31          (%get-unsigned-byte p 6) (ldb (byte 8 24) index)
32          (%get-unsigned-byte p 7) #xff  ; jmp *
33          (%get-unsigned-byte p 8) #x24
34          (%get-unsigned-byte p 9) #x25
35          (%get-unsigned-byte p 10) (ldb (byte 8 0) addr)
36          (%get-unsigned-byte p 11) (ldb (byte 8 8) addr)
37          (%get-unsigned-byte p 12) (ldb (byte 8 16) addr)
38          (%get-unsigned-byte p 13) (ldb (byte 8 24) addr))
39    p))
40         
41#+x8632-target         
42(defun make-callback-trampoline (index &optional (discard-stack-bytes 0))
43  (let* ((p (%allocate-callback-pointer 12))
44         (addr #.(subprim-name->offset '.SPcallback)))
45    (setf (%get-unsigned-byte p 0) #xb8 ; movl $n,%eax
46          (%get-unsigned-byte p 1) (ldb (byte 8 0) index)
47          (%get-unsigned-byte p 2) (ldb (byte 8 8) index)
48          (%get-unsigned-byte p 3) (ldb (byte 8 16) index)
49          (%get-unsigned-byte p 4) (ldb (byte 8 24) (ash discard-stack (- x8632::word-shift)))
50          (%get-unsigned-byte p 5) #xff  ; jmp *
51          (%get-unsigned-byte p 6) #x24
52          (%get-unsigned-byte p 7) #x25
53          (%get-unsigned-byte p 8) (ldb (byte 8 0) addr)
54          (%get-unsigned-byte p 9) (ldb (byte 8 8) addr)
55          (%get-unsigned-byte p 10) (ldb (byte 8 16) addr)
56          (%get-unsigned-byte p 11) (ldb (byte 8 24) addr))
57    p))
58 
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