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1 | \ ========== Copyright Header Begin ========================================== |
2 | \ | |
3 | \ Hypervisor Software File: reloc.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 | \ reloc.fth 2.6 01/04/06 | |
43 | \ Copyright 1985-1990 Bradley Forthware | |
44 | \ Copyright 1994-2001 Sun Microsystems, Inc. All Rights Reserved | |
45 | ||
46 | \ Unix Relocation for SPARC | |
47 | \ relocation-table ( -- adr ) \ Base address of relocation table | |
48 | \ /relocation-table ( -- n ) \ Current size of relocation table | |
49 | \ add-reference ( adr name -- ) \ Relocate longword at adr to name | |
50 | \ add-call ( adr name -- ) \ Relocate call at adr to name | |
51 | \ set-reference ( adr name -- ) \ Relocate sethi,or at adr to name | |
52 | ||
53 | headerless | |
54 | 100 constant #relocations-max | |
55 | ||
56 | struct ( relocation-datum ) | |
57 | /l field r_address \ address which is relocated | |
58 | 3 field r_sym# \ sym# in high 24 bits, flags in low byte | |
59 | /c field r_flags \ flags: | |
60 | ||
61 | \ unsigned int r_extern : 1; /* if F, r_index==SEG#; if T, SYM idx */ | |
62 | \ int : 2; /* <unused> */ | |
63 | \ enum reloc_type r_type : 5; /* type of relocation to perform */ | |
64 | ||
65 | /l field r_addend \ addend for relocation value | |
66 | constant /reloc-struct | |
67 | ||
68 | variable relocation# | |
69 | : /reloc* ( index -- offset ) /reloc-struct * ; | |
70 | : /relocation-table ( -- n ) relocation# @ /reloc* ; | |
71 | #relocations-max /reloc* constant /relocation-table-max | |
72 | /relocation-table-max buffer: relocation-table | |
73 | ||
74 | overload: clear-symbol-table ( -- ) clear-symbol-table relocation# off ; | |
75 | ||
76 | : make-relocation ( adr sym# offset type -- ) | |
77 | 2swap | |
78 | relocation# @ /reloc* relocation-table + >r ( offset type adr sym# ) | |
79 | swap r@ r_address l! ( offset type sym# ) | |
80 | 8 << r@ r_sym# l! ( offset type ) | |
81 | r@ r_flags c! \ Set relocation type ( offset ) | |
82 | r> r_addend l! \ Set offset ( offset ) | |
83 | 1 relocation# +! | |
84 | ; | |
85 | ||
86 | \ Longword reference | |
87 | : $add-reference ( adr name-adr,len -- ) | |
88 | ?$add-symbol 0 sparc-32 make-relocation | |
89 | ; | |
90 | ||
91 | \ Call instruction (offset is -adr because calls are relative) | |
92 | : $add-call ( adr name-adr,len -- ) | |
93 | ?$add-symbol over negate sparc-wdisp30 make-relocation | |
94 | ; | |
95 | ||
96 | \ "set" (sethi + or) instruction | |
97 | \ Used as follows: | |
98 | \ here p" _foobar" set-reference | |
99 | \ 0 %l0 sethi | |
100 | \ %l0 0 %l0 or | |
101 | ||
102 | : $set-reference-hi22 ( adr name-adr,len -- ) | |
103 | ?$add-symbol ( adr sym# ) | |
104 | 0 sparc-hi22 make-relocation ( ) \ high 22 bits | |
105 | ; | |
106 | : $set-reference-lo10 ( adr name-adr,len -- ) | |
107 | ?$add-symbol ( adr sym# ) | |
108 | 0 sparc-lo10 make-relocation ( ) \ low 10 bits | |
109 | ; | |
110 | : $set-reference ( adr name-adr,len -- ) | |
111 | 3dup $set-reference-hi22 ( adr name-adr,len ) | |
112 | rot 4 + -rot ( adr+4 name-adr,len ) | |
113 | $set-reference-lo10 ( adr name-adr,len ) | |
114 | ||
115 | ; | |
116 | headers |