kernel: Use hashdestroy() to free hash tables allocated with hashinit().
[dragonfly.git] / usr.bin / doscmd / int2f.c
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1/*
2 * Copyright (c) 1992, 1993, 1996
3 * Berkeley Software Design, Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Berkeley Software
16 * Design, Inc.
17 *
18 * THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * BSDI int2f.c,v 2.2 1996/04/08 19:32:53 bostic Exp
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31 *
32 * $FreeBSD: src/usr.bin/doscmd/int2f.c,v 1.3.2.2 2002/04/25 11:04:51 tg Exp $
33 * $DragonFly: src/usr.bin/doscmd/int2f.c,v 1.2 2003/06/17 04:29:26 dillon Exp $
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34 */
35
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36#include "doscmd.h"
37#include "dispatch.h"
38#include "tty.h"
39
40/*
41** Multiplex interrupt.
42**
43** subfunctions 0-0x7f reserved for DOS, some are implemented here.
44**
45*/
46
47/*
48** 2f:00 2f:01 2f:02 2f:03
49**
50** Various PRINT.COM functions
51*/
52static int
53int2f_printer(regcontext_t *REGS)
54{
55 debug (D_FILE_OPS, "Called printer function 0x%02x", R_AH);
56 R_AL = FUNC_NUM_IVALID;
57 return(0);
58}
59
60/*
61** 2f:12
62**
63** DOS internal functions. Only one we support is 0x2e, and then only to
64** complain about it.
65*/
66static int
67int2f_dosinternal(regcontext_t *REGS)
68{
69 switch (R_AL) {
70 case 0x2e: /* XXX - GET/SET ERROR TABLE ADDRESSES */
71 switch (R_DL) {
72 case 0x00:
73 case 0x02:
74 case 0x04:
75 case 0x06:
76 debug(D_ALWAYS,"DOS program attempted to get internal error table.\n");
77 break;
78
79 case 0x01:
80 case 0x03:
81 case 0x05:
82 case 0x07:
83 case 0x09:
84 debug(D_ALWAYS,"DOS program attempted to set error table.\n");
85 break;
86 }
87
88 default:
89 unknown_int4(0x2f, 0x12, R_AL, R_DL, REGS);
90 break;
91 }
92 R_AL = FUNC_NUM_IVALID;
93 return(0);
94}
95
96/*
97** 2f:16
98**
99** Windows Enhanced Mode functions. Aigh!
100*/
101static int
102int2f_windows(regcontext_t *REGS)
103{
104 switch (R_AL) {
105 case 0x00:
106 R_AL = 0x00; /* Neither Win 3.x nor 2.x running */
107 return(0);
108
109 case 0x80: /* installation check */
110 tty_pause();
111 R_AL = 0x00;
112 return(0);
113
114 default:
115 unknown_int3(0x2f, 0x16, R_AL, REGS);
116 break;
117 }
118 R_AL = FUNC_NUM_IVALID;
119 return(0);
120}
121
122/*
123** 2f:43
124**
125** XMS interface
126*/
127static int
128int2f_xms(regcontext_t *REGS)
129{
130 switch(R_AL) {
131 case 0: /* installation check */
132 return(0); /* %al = 0 */
133 default:
134 R_AL = FUNC_NUM_IVALID;
135 return(0);
136 }
137}
138
139
140static struct intfunc_table int2f_table[] = {
141
142 { 0x00, IFT_NOSUBFUNC, int2f_printer, "printer"},
143 { 0x01, IFT_NOSUBFUNC, int2f_printer, "printer"},
144 { 0x02, IFT_NOSUBFUNC, int2f_printer, "printer"},
145 { 0x03, IFT_NOSUBFUNC, int2f_printer, "printer"},
146 { 0x12, IFT_NOSUBFUNC, int2f_dosinternal, "DOS internal function"},
147 { 0x16, IFT_NOSUBFUNC, int2f_windows, "Windows detect"},
148 { 0x43, IFT_NOSUBFUNC, int2f_xms, "XMS"},
149 { -1, 0, NULL, NULL}
150};
151
152/*
153** int2f (multiplex) handler.
154**
155** Note that due to the widely varied and inconsistent conventions, handlers
156** called from here are expected to manage their own return values.
157*/
158void
159int2f(regcontext_t *REGS)
160{
161 int idx;
162
163 /* look up the handler for the current function */
164 idx = intfunc_search(int2f_table, R_AH, R_AL);
165
166 if (idx >= 0) { /* respond on multiplex chain */
167 int2f_table[idx].handler(REGS);
168 } else {
169 unknown_int2(0x2f, R_AH, REGS);
170 }
171}
172
173
174