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1 | \ ========== Copyright Header Begin ========================================== |
2 | \ | |
3 | \ Hypervisor Software File: makecent9.fth | |
4 | \ | |
5 | \ Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
6 | \ | |
7 | \ - Do no alter or remove copyright notices | |
8 | \ | |
9 | \ - Redistribution and use of this software in source and binary forms, with | |
10 | \ or without modification, are permitted provided that the following | |
11 | \ conditions are met: | |
12 | \ | |
13 | \ - Redistribution of source code must retain the above copyright notice, | |
14 | \ this list of conditions and the following disclaimer. | |
15 | \ | |
16 | \ - Redistribution in binary form must reproduce the above copyright notice, | |
17 | \ this list of conditions and the following disclaimer in the | |
18 | \ documentation and/or other materials provided with the distribution. | |
19 | \ | |
20 | \ Neither the name of Sun Microsystems, Inc. or the names of contributors | |
21 | \ may be used to endorse or promote products derived from this software | |
22 | \ without specific prior written permission. | |
23 | \ | |
24 | \ This software is provided "AS IS," without a warranty of any kind. | |
25 | \ ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
26 | \ INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
27 | \ PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN | |
28 | \ MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR | |
29 | \ ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR | |
30 | \ DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN | |
31 | \ OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR | |
32 | \ FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE | |
33 | \ DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, | |
34 | \ ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF | |
35 | \ SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
36 | \ | |
37 | \ You acknowledge that this software is not designed, licensed or | |
38 | \ intended for use in the design, construction, operation or maintenance of | |
39 | \ any nuclear facility. | |
40 | \ | |
41 | \ ========== Copyright Header End ============================================ | |
42 | id: @(#)makecent9.fth 1.1 94/11/08 | |
43 | copyright: Copyright 1991-1994 Sun Microsystems, Inc. All Rights Reserved | |
44 | ||
45 | \ Processor-dependent code to create entry points to allow C code to call | |
46 | \ Forth words. | |
47 | \ | |
48 | \ make-c-entry ( #args #returns acf -- entry-code-adr ) | |
49 | \ | |
50 | \ Creates an interface routine to allow the Forth word whose | |
51 | \ compilation address is "acf" to be called from C. #args is | |
52 | \ the number of stack arguments expected by the Forth word, | |
53 | \ and #results is the number of results returned on the stack. | |
54 | \ | |
55 | \ #returns must be either 0 or 1, since C functions have at most 1 | |
56 | \ return value. | |
57 | ||
58 | decimal | |
59 | ||
60 | headerless | |
61 | : make-c-entry ( #args #returns acf -- c-entry-code-adr ) | |
62 | align | |
63 | here >r ( #args #returns acf ) | |
64 | ||
65 | [ also assembler ] | |
66 | ||
67 | %o6 /entry-frame %o6 save \ Allocate space for locals, globals, stacks | |
68 | ||
69 | forth-entry call | |
70 | nop | |
71 | ||
72 | [ previous ] ( #args #returns acf ) | |
73 | ||
74 | token, ( #args #returns ) | |
75 | 2drop ( ) | |
76 | compile return-to-c | |
77 | r> | |
78 | ; | |
79 | : $c-entry ( #args #results forth-acf C-name$ -- ) | |
80 | 2>r make-c-entry origin- 2r> ( entry-adr C-name$ ) | |
81 | external-procedure $add-symbol | |
82 | ; | |
83 | : $double-return-c-entry ( #args #results forth-acf C-name$ -- ) | |
84 | $c-entry | |
85 | ['] double-return-to-c here /token - token! | |
86 | ; | |
87 | headers | |
88 |