Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0
2 : /*
3 : * consolemap.c
4 : *
5 : * Mapping from internal code (such as Latin-1 or Unicode or IBM PC code)
6 : * to font positions.
7 : *
8 : * aeb, 950210
9 : *
10 : * Support for multiple unimaps by Jakub Jelinek <jj@ultra.linux.cz>, July 1998
11 : *
12 : * Fix bug in inverse translation. Stanislav Voronyi <stas@cnti.uanet.kharkov.ua>, Dec 1998
13 : *
14 : * In order to prevent the following circular lock dependency:
15 : * &mm->mmap_lock --> cpu_hotplug.lock --> console_lock --> &mm->mmap_lock
16 : *
17 : * We cannot allow page fault to happen while holding the console_lock.
18 : * Therefore, all the userspace copy operations have to be done outside
19 : * the console_lock critical sections.
20 : *
21 : * As all the affected functions are all called directly from vt_ioctl(), we
22 : * can allocate some small buffers directly on stack without worrying about
23 : * stack overflow.
24 : */
25 :
26 : #include <linux/module.h>
27 : #include <linux/kd.h>
28 : #include <linux/errno.h>
29 : #include <linux/mm.h>
30 : #include <linux/slab.h>
31 : #include <linux/init.h>
32 : #include <linux/tty.h>
33 : #include <linux/uaccess.h>
34 : #include <linux/console.h>
35 : #include <linux/consolemap.h>
36 : #include <linux/vt_kern.h>
37 : #include <linux/string.h>
38 :
39 : static unsigned short translations[][256] = {
40 : /* 8-bit Latin-1 mapped to Unicode -- trivial mapping */
41 : {
42 : 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
43 : 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
44 : 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
45 : 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
46 : 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
47 : 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
48 : 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
49 : 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
50 : 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
51 : 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
52 : 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
53 : 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
54 : 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
55 : 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
56 : 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
57 : 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
58 : 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
59 : 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
60 : 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
61 : 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
62 : 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
63 : 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
64 : 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
65 : 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
66 : 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
67 : 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
68 : 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
69 : 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
70 : 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
71 : 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
72 : 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
73 : 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
74 : },
75 : /* VT100 graphics mapped to Unicode */
76 : {
77 : 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
78 : 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
79 : 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
80 : 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
81 : 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
82 : 0x0028, 0x0029, 0x002a, 0x2192, 0x2190, 0x2191, 0x2193, 0x002f,
83 : 0x2588, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
84 : 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
85 : 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
86 : 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
87 : 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
88 : 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x00a0,
89 : 0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
90 : 0x2591, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
91 : 0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
92 : 0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x007f,
93 : 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
94 : 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
95 : 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
96 : 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
97 : 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
98 : 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
99 : 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
100 : 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
101 : 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
102 : 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
103 : 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
104 : 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
105 : 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
106 : 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
107 : 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
108 : 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
109 : },
110 : /* IBM Codepage 437 mapped to Unicode */
111 : {
112 : 0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022,
113 : 0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c,
114 : 0x25b6, 0x25c0, 0x2195, 0x203c, 0x00b6, 0x00a7, 0x25ac, 0x21a8,
115 : 0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc,
116 : 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
117 : 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
118 : 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
119 : 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
120 : 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
121 : 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
122 : 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
123 : 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
124 : 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
125 : 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
126 : 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
127 : 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x2302,
128 : 0x00c7, 0x00fc, 0x00e9, 0x00e2, 0x00e4, 0x00e0, 0x00e5, 0x00e7,
129 : 0x00ea, 0x00eb, 0x00e8, 0x00ef, 0x00ee, 0x00ec, 0x00c4, 0x00c5,
130 : 0x00c9, 0x00e6, 0x00c6, 0x00f4, 0x00f6, 0x00f2, 0x00fb, 0x00f9,
131 : 0x00ff, 0x00d6, 0x00dc, 0x00a2, 0x00a3, 0x00a5, 0x20a7, 0x0192,
132 : 0x00e1, 0x00ed, 0x00f3, 0x00fa, 0x00f1, 0x00d1, 0x00aa, 0x00ba,
133 : 0x00bf, 0x2310, 0x00ac, 0x00bd, 0x00bc, 0x00a1, 0x00ab, 0x00bb,
134 : 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
135 : 0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510,
136 : 0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f,
137 : 0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567,
138 : 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b,
139 : 0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580,
140 : 0x03b1, 0x00df, 0x0393, 0x03c0, 0x03a3, 0x03c3, 0x00b5, 0x03c4,
141 : 0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229,
142 : 0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248,
143 : 0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0
144 : },
145 : /* User mapping -- default to codes for direct font mapping */
146 : {
147 : 0xf000, 0xf001, 0xf002, 0xf003, 0xf004, 0xf005, 0xf006, 0xf007,
148 : 0xf008, 0xf009, 0xf00a, 0xf00b, 0xf00c, 0xf00d, 0xf00e, 0xf00f,
149 : 0xf010, 0xf011, 0xf012, 0xf013, 0xf014, 0xf015, 0xf016, 0xf017,
150 : 0xf018, 0xf019, 0xf01a, 0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f,
151 : 0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027,
152 : 0xf028, 0xf029, 0xf02a, 0xf02b, 0xf02c, 0xf02d, 0xf02e, 0xf02f,
153 : 0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037,
154 : 0xf038, 0xf039, 0xf03a, 0xf03b, 0xf03c, 0xf03d, 0xf03e, 0xf03f,
155 : 0xf040, 0xf041, 0xf042, 0xf043, 0xf044, 0xf045, 0xf046, 0xf047,
156 : 0xf048, 0xf049, 0xf04a, 0xf04b, 0xf04c, 0xf04d, 0xf04e, 0xf04f,
157 : 0xf050, 0xf051, 0xf052, 0xf053, 0xf054, 0xf055, 0xf056, 0xf057,
158 : 0xf058, 0xf059, 0xf05a, 0xf05b, 0xf05c, 0xf05d, 0xf05e, 0xf05f,
159 : 0xf060, 0xf061, 0xf062, 0xf063, 0xf064, 0xf065, 0xf066, 0xf067,
160 : 0xf068, 0xf069, 0xf06a, 0xf06b, 0xf06c, 0xf06d, 0xf06e, 0xf06f,
161 : 0xf070, 0xf071, 0xf072, 0xf073, 0xf074, 0xf075, 0xf076, 0xf077,
162 : 0xf078, 0xf079, 0xf07a, 0xf07b, 0xf07c, 0xf07d, 0xf07e, 0xf07f,
163 : 0xf080, 0xf081, 0xf082, 0xf083, 0xf084, 0xf085, 0xf086, 0xf087,
164 : 0xf088, 0xf089, 0xf08a, 0xf08b, 0xf08c, 0xf08d, 0xf08e, 0xf08f,
165 : 0xf090, 0xf091, 0xf092, 0xf093, 0xf094, 0xf095, 0xf096, 0xf097,
166 : 0xf098, 0xf099, 0xf09a, 0xf09b, 0xf09c, 0xf09d, 0xf09e, 0xf09f,
167 : 0xf0a0, 0xf0a1, 0xf0a2, 0xf0a3, 0xf0a4, 0xf0a5, 0xf0a6, 0xf0a7,
168 : 0xf0a8, 0xf0a9, 0xf0aa, 0xf0ab, 0xf0ac, 0xf0ad, 0xf0ae, 0xf0af,
169 : 0xf0b0, 0xf0b1, 0xf0b2, 0xf0b3, 0xf0b4, 0xf0b5, 0xf0b6, 0xf0b7,
170 : 0xf0b8, 0xf0b9, 0xf0ba, 0xf0bb, 0xf0bc, 0xf0bd, 0xf0be, 0xf0bf,
171 : 0xf0c0, 0xf0c1, 0xf0c2, 0xf0c3, 0xf0c4, 0xf0c5, 0xf0c6, 0xf0c7,
172 : 0xf0c8, 0xf0c9, 0xf0ca, 0xf0cb, 0xf0cc, 0xf0cd, 0xf0ce, 0xf0cf,
173 : 0xf0d0, 0xf0d1, 0xf0d2, 0xf0d3, 0xf0d4, 0xf0d5, 0xf0d6, 0xf0d7,
174 : 0xf0d8, 0xf0d9, 0xf0da, 0xf0db, 0xf0dc, 0xf0dd, 0xf0de, 0xf0df,
175 : 0xf0e0, 0xf0e1, 0xf0e2, 0xf0e3, 0xf0e4, 0xf0e5, 0xf0e6, 0xf0e7,
176 : 0xf0e8, 0xf0e9, 0xf0ea, 0xf0eb, 0xf0ec, 0xf0ed, 0xf0ee, 0xf0ef,
177 : 0xf0f0, 0xf0f1, 0xf0f2, 0xf0f3, 0xf0f4, 0xf0f5, 0xf0f6, 0xf0f7,
178 : 0xf0f8, 0xf0f9, 0xf0fa, 0xf0fb, 0xf0fc, 0xf0fd, 0xf0fe, 0xf0ff
179 : }
180 : };
181 :
182 : /* The standard kernel character-to-font mappings are not invertible
183 : -- this is just a best effort. */
184 :
185 : #define MAX_GLYPH 512 /* Max possible glyph value */
186 :
187 : static int inv_translate[MAX_NR_CONSOLES];
188 :
189 : struct uni_pagedir {
190 : u16 **uni_pgdir[32];
191 : unsigned long refcount;
192 : unsigned long sum;
193 : unsigned char *inverse_translations[4];
194 : u16 *inverse_trans_unicode;
195 : };
196 :
197 : static struct uni_pagedir *dflt;
198 :
199 4 : static void set_inverse_transl(struct vc_data *conp, struct uni_pagedir *p, int i)
200 : {
201 4 : int j, glyph;
202 4 : unsigned short *t = translations[i];
203 4 : unsigned char *q;
204 :
205 4 : if (!p) return;
206 4 : q = p->inverse_translations[i];
207 :
208 4 : if (!q) {
209 4 : q = p->inverse_translations[i] = kmalloc(MAX_GLYPH, GFP_KERNEL);
210 4 : if (!q) return;
211 : }
212 4 : memset(q, 0, MAX_GLYPH);
213 :
214 1028 : for (j = 0; j < E_TABSZ; j++) {
215 1024 : glyph = conv_uni_to_pc(conp, t[j]);
216 1024 : if (glyph >= 0 && glyph < MAX_GLYPH && q[glyph] < 32) {
217 : /* prefer '-' above SHY etc. */
218 812 : q[glyph] = j;
219 : }
220 : }
221 : }
222 :
223 1 : static void set_inverse_trans_unicode(struct vc_data *conp,
224 : struct uni_pagedir *p)
225 : {
226 1 : int i, j, k, glyph;
227 1 : u16 **p1, *p2;
228 1 : u16 *q;
229 :
230 1 : if (!p) return;
231 1 : q = p->inverse_trans_unicode;
232 1 : if (!q) {
233 2 : q = p->inverse_trans_unicode =
234 1 : kmalloc_array(MAX_GLYPH, sizeof(u16), GFP_KERNEL);
235 1 : if (!q)
236 : return;
237 : }
238 1 : memset(q, 0, MAX_GLYPH * sizeof(u16));
239 :
240 33 : for (i = 0; i < 32; i++) {
241 32 : p1 = p->uni_pgdir[i];
242 32 : if (!p1)
243 29 : continue;
244 99 : for (j = 0; j < 32; j++) {
245 96 : p2 = p1[j];
246 96 : if (!p2)
247 72 : continue;
248 1560 : for (k = 0; k < 64; k++) {
249 1536 : glyph = p2[k];
250 1536 : if (glyph >= 0 && glyph < MAX_GLYPH
251 303 : && q[glyph] < 32)
252 256 : q[glyph] = (i << 11) + (j << 6) + k;
253 : }
254 : }
255 : }
256 : }
257 :
258 6 : unsigned short *set_translate(int m, struct vc_data *vc)
259 : {
260 6 : inv_translate[vc->vc_num] = m;
261 6 : return translations[m];
262 : }
263 :
264 : /*
265 : * Inverse translation is impossible for several reasons:
266 : * 1. The font<->character maps are not 1-1.
267 : * 2. The text may have been written while a different translation map
268 : * was active.
269 : * Still, it is now possible to a certain extent to cut and paste non-ASCII.
270 : */
271 0 : u16 inverse_translate(const struct vc_data *conp, int glyph, int use_unicode)
272 : {
273 0 : struct uni_pagedir *p;
274 0 : int m;
275 0 : if (glyph < 0 || glyph >= MAX_GLYPH)
276 : return 0;
277 : else {
278 0 : p = *conp->vc_uni_pagedir_loc;
279 0 : if (!p)
280 0 : return glyph;
281 0 : else if (use_unicode) {
282 0 : if (!p->inverse_trans_unicode)
283 0 : return glyph;
284 : else
285 0 : return p->inverse_trans_unicode[glyph];
286 : } else {
287 0 : m = inv_translate[conp->vc_num];
288 0 : if (!p->inverse_translations[m])
289 0 : return glyph;
290 : else
291 0 : return p->inverse_translations[m][glyph];
292 : }
293 : }
294 : }
295 : EXPORT_SYMBOL_GPL(inverse_translate);
296 :
297 0 : static void update_user_maps(void)
298 : {
299 0 : int i;
300 0 : struct uni_pagedir *p, *q = NULL;
301 :
302 0 : for (i = 0; i < MAX_NR_CONSOLES; i++) {
303 0 : if (!vc_cons_allocated(i))
304 0 : continue;
305 0 : p = *vc_cons[i].d->vc_uni_pagedir_loc;
306 0 : if (p && p != q) {
307 0 : set_inverse_transl(vc_cons[i].d, p, USER_MAP);
308 0 : set_inverse_trans_unicode(vc_cons[i].d, p);
309 0 : q = p;
310 : }
311 : }
312 0 : }
313 :
314 : /*
315 : * Load customizable translation table
316 : * arg points to a 256 byte translation table.
317 : *
318 : * The "old" variants are for translation directly to font (using the
319 : * 0xf000-0xf0ff "transparent" Unicodes) whereas the "new" variants set
320 : * Unicodes explicitly.
321 : */
322 0 : int con_set_trans_old(unsigned char __user * arg)
323 : {
324 0 : int i;
325 0 : unsigned short inbuf[E_TABSZ];
326 0 : unsigned char ubuf[E_TABSZ];
327 :
328 0 : if (copy_from_user(ubuf, arg, E_TABSZ))
329 : return -EFAULT;
330 :
331 0 : for (i = 0; i < E_TABSZ ; i++)
332 0 : inbuf[i] = UNI_DIRECT_BASE | ubuf[i];
333 :
334 0 : console_lock();
335 0 : memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
336 0 : update_user_maps();
337 0 : console_unlock();
338 0 : return 0;
339 : }
340 :
341 0 : int con_get_trans_old(unsigned char __user * arg)
342 : {
343 0 : int i, ch;
344 0 : unsigned short *p = translations[USER_MAP];
345 0 : unsigned char outbuf[E_TABSZ];
346 :
347 0 : console_lock();
348 0 : for (i = 0; i < E_TABSZ ; i++)
349 : {
350 0 : ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]);
351 0 : outbuf[i] = (ch & ~0xff) ? 0 : ch;
352 : }
353 0 : console_unlock();
354 :
355 0 : return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
356 : }
357 :
358 0 : int con_set_trans_new(ushort __user * arg)
359 : {
360 0 : unsigned short inbuf[E_TABSZ];
361 :
362 0 : if (copy_from_user(inbuf, arg, sizeof(inbuf)))
363 : return -EFAULT;
364 :
365 0 : console_lock();
366 0 : memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
367 0 : update_user_maps();
368 0 : console_unlock();
369 0 : return 0;
370 : }
371 :
372 0 : int con_get_trans_new(ushort __user * arg)
373 : {
374 0 : unsigned short outbuf[E_TABSZ];
375 :
376 0 : console_lock();
377 0 : memcpy(outbuf, translations[USER_MAP], sizeof(outbuf));
378 0 : console_unlock();
379 :
380 0 : return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
381 : }
382 :
383 : /*
384 : * Unicode -> current font conversion
385 : *
386 : * A font has at most 512 chars, usually 256.
387 : * But one font position may represent several Unicode chars.
388 : * A hashtable is somewhat of a pain to deal with, so use a
389 : * "paged table" instead. Simulation has shown the memory cost of
390 : * this 3-level paged table scheme to be comparable to a hash table.
391 : */
392 :
393 : extern u8 dfont_unicount[]; /* Defined in console_defmap.c */
394 : extern u16 dfont_unitable[];
395 :
396 0 : static void con_release_unimap(struct uni_pagedir *p)
397 : {
398 0 : u16 **p1;
399 0 : int i, j;
400 :
401 0 : if (p == dflt) dflt = NULL;
402 0 : for (i = 0; i < 32; i++) {
403 0 : p1 = p->uni_pgdir[i];
404 0 : if (p1 != NULL) {
405 0 : for (j = 0; j < 32; j++)
406 0 : kfree(p1[j]);
407 0 : kfree(p1);
408 : }
409 0 : p->uni_pgdir[i] = NULL;
410 : }
411 0 : for (i = 0; i < 4; i++) {
412 0 : kfree(p->inverse_translations[i]);
413 0 : p->inverse_translations[i] = NULL;
414 : }
415 0 : kfree(p->inverse_trans_unicode);
416 0 : p->inverse_trans_unicode = NULL;
417 0 : }
418 :
419 : /* Caller must hold the console lock */
420 0 : void con_free_unimap(struct vc_data *vc)
421 : {
422 0 : struct uni_pagedir *p;
423 :
424 0 : p = *vc->vc_uni_pagedir_loc;
425 0 : if (!p)
426 : return;
427 0 : *vc->vc_uni_pagedir_loc = NULL;
428 0 : if (--p->refcount)
429 : return;
430 0 : con_release_unimap(p);
431 0 : kfree(p);
432 : }
433 :
434 1 : static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p)
435 : {
436 1 : int i, j, k;
437 1 : struct uni_pagedir *q;
438 :
439 64 : for (i = 0; i < MAX_NR_CONSOLES; i++) {
440 63 : if (!vc_cons_allocated(i))
441 62 : continue;
442 1 : q = *vc_cons[i].d->vc_uni_pagedir_loc;
443 1 : if (!q || q == p || q->sum != p->sum)
444 1 : continue;
445 0 : for (j = 0; j < 32; j++) {
446 0 : u16 **p1, **q1;
447 0 : p1 = p->uni_pgdir[j]; q1 = q->uni_pgdir[j];
448 0 : if (!p1 && !q1)
449 0 : continue;
450 0 : if (!p1 || !q1)
451 : break;
452 0 : for (k = 0; k < 32; k++) {
453 0 : if (!p1[k] && !q1[k])
454 0 : continue;
455 0 : if (!p1[k] || !q1[k])
456 : break;
457 0 : if (memcmp(p1[k], q1[k], 64*sizeof(u16)))
458 : break;
459 : }
460 0 : if (k < 32)
461 : break;
462 : }
463 0 : if (j == 32) {
464 0 : q->refcount++;
465 0 : *conp->vc_uni_pagedir_loc = q;
466 0 : con_release_unimap(p);
467 0 : kfree(p);
468 0 : return 1;
469 : }
470 : }
471 : return 0;
472 : }
473 :
474 : static int
475 303 : con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
476 : {
477 303 : int i, n;
478 303 : u16 **p1, *p2;
479 :
480 303 : p1 = p->uni_pgdir[n = unicode >> 11];
481 303 : if (!p1) {
482 3 : p1 = p->uni_pgdir[n] = kmalloc_array(32, sizeof(u16 *),
483 : GFP_KERNEL);
484 3 : if (!p1) return -ENOMEM;
485 99 : for (i = 0; i < 32; i++)
486 96 : p1[i] = NULL;
487 : }
488 :
489 303 : p2 = p1[n = (unicode >> 6) & 0x1f];
490 303 : if (!p2) {
491 24 : p2 = p1[n] = kmalloc_array(64, sizeof(u16), GFP_KERNEL);
492 24 : if (!p2) return -ENOMEM;
493 24 : memset(p2, 0xff, 64*sizeof(u16)); /* No glyphs for the characters (yet) */
494 : }
495 :
496 303 : p2[unicode & 0x3f] = fontpos;
497 :
498 303 : p->sum += (fontpos << 20U) + unicode;
499 :
500 303 : return 0;
501 : }
502 :
503 : /* Caller must hold the lock */
504 1 : static int con_do_clear_unimap(struct vc_data *vc)
505 : {
506 1 : struct uni_pagedir *p, *q;
507 :
508 1 : p = *vc->vc_uni_pagedir_loc;
509 1 : if (!p || --p->refcount) {
510 1 : q = kzalloc(sizeof(*p), GFP_KERNEL);
511 1 : if (!q) {
512 0 : if (p)
513 0 : p->refcount++;
514 0 : return -ENOMEM;
515 : }
516 1 : q->refcount=1;
517 1 : *vc->vc_uni_pagedir_loc = q;
518 : } else {
519 0 : if (p == dflt) dflt = NULL;
520 0 : p->refcount++;
521 0 : p->sum = 0;
522 0 : con_release_unimap(p);
523 : }
524 : return 0;
525 : }
526 :
527 0 : int con_clear_unimap(struct vc_data *vc)
528 : {
529 0 : int ret;
530 0 : console_lock();
531 0 : ret = con_do_clear_unimap(vc);
532 0 : console_unlock();
533 0 : return ret;
534 : }
535 :
536 0 : int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
537 : {
538 0 : int err = 0, err1, i;
539 0 : struct uni_pagedir *p, *q;
540 0 : struct unipair *unilist, *plist;
541 :
542 0 : if (!ct)
543 : return 0;
544 :
545 0 : unilist = vmemdup_user(list, array_size(sizeof(struct unipair), ct));
546 0 : if (IS_ERR(unilist))
547 0 : return PTR_ERR(unilist);
548 :
549 0 : console_lock();
550 :
551 : /* Save original vc_unipagdir_loc in case we allocate a new one */
552 0 : p = *vc->vc_uni_pagedir_loc;
553 :
554 0 : if (!p) {
555 0 : err = -EINVAL;
556 :
557 0 : goto out_unlock;
558 : }
559 :
560 0 : if (p->refcount > 1) {
561 0 : int j, k;
562 0 : u16 **p1, *p2, l;
563 :
564 0 : err1 = con_do_clear_unimap(vc);
565 0 : if (err1) {
566 0 : err = err1;
567 0 : goto out_unlock;
568 : }
569 :
570 : /*
571 : * Since refcount was > 1, con_clear_unimap() allocated a
572 : * a new uni_pagedir for this vc. Re: p != q
573 : */
574 0 : q = *vc->vc_uni_pagedir_loc;
575 :
576 : /*
577 : * uni_pgdir is a 32*32*64 table with rows allocated
578 : * when its first entry is added. The unicode value must
579 : * still be incremented for empty rows. We are copying
580 : * entries from "p" (old) to "q" (new).
581 : */
582 0 : l = 0; /* unicode value */
583 0 : for (i = 0; i < 32; i++) {
584 0 : p1 = p->uni_pgdir[i];
585 0 : if (p1)
586 0 : for (j = 0; j < 32; j++) {
587 0 : p2 = p1[j];
588 0 : if (p2) {
589 0 : for (k = 0; k < 64; k++, l++)
590 0 : if (p2[k] != 0xffff) {
591 : /*
592 : * Found one, copy entry for unicode
593 : * l with fontpos value p2[k].
594 : */
595 0 : err1 = con_insert_unipair(q, l, p2[k]);
596 0 : if (err1) {
597 0 : p->refcount++;
598 0 : *vc->vc_uni_pagedir_loc = p;
599 0 : con_release_unimap(q);
600 0 : kfree(q);
601 0 : err = err1;
602 0 : goto out_unlock;
603 : }
604 : }
605 : } else {
606 : /* Account for row of 64 empty entries */
607 0 : l += 64;
608 : }
609 : }
610 : else
611 : /* Account for empty table */
612 0 : l += 32 * 64;
613 : }
614 :
615 : /*
616 : * Finished copying font table, set vc_uni_pagedir to new table
617 : */
618 : p = q;
619 0 : } else if (p == dflt) {
620 0 : dflt = NULL;
621 : }
622 :
623 : /*
624 : * Insert user specified unicode pairs into new table.
625 : */
626 0 : for (plist = unilist; ct; ct--, plist++) {
627 0 : err1 = con_insert_unipair(p, plist->unicode, plist->fontpos);
628 0 : if (err1)
629 0 : err = err1;
630 : }
631 :
632 : /*
633 : * Merge with fontmaps of any other virtual consoles.
634 : */
635 0 : if (con_unify_unimap(vc, p))
636 0 : goto out_unlock;
637 :
638 0 : for (i = 0; i <= 3; i++)
639 0 : set_inverse_transl(vc, p, i); /* Update inverse translations */
640 0 : set_inverse_trans_unicode(vc, p);
641 :
642 0 : out_unlock:
643 0 : console_unlock();
644 0 : kvfree(unilist);
645 0 : return err;
646 : }
647 :
648 : /**
649 : * con_set_default_unimap - set default unicode map
650 : * @vc: the console we are updating
651 : *
652 : * Loads the unimap for the hardware font, as defined in uni_hash.tbl.
653 : * The representation used was the most compact I could come up
654 : * with. This routine is executed at video setup, and when the
655 : * PIO_FONTRESET ioctl is called.
656 : *
657 : * The caller must hold the console lock
658 : */
659 6 : int con_set_default_unimap(struct vc_data *vc)
660 : {
661 6 : int i, j, err = 0, err1;
662 6 : u16 *q;
663 6 : struct uni_pagedir *p;
664 :
665 6 : if (dflt) {
666 5 : p = *vc->vc_uni_pagedir_loc;
667 5 : if (p == dflt)
668 : return 0;
669 :
670 5 : dflt->refcount++;
671 5 : *vc->vc_uni_pagedir_loc = dflt;
672 5 : if (p && !--p->refcount) {
673 0 : con_release_unimap(p);
674 0 : kfree(p);
675 : }
676 5 : return 0;
677 : }
678 :
679 : /* The default font is always 256 characters */
680 :
681 1 : err = con_do_clear_unimap(vc);
682 1 : if (err)
683 : return err;
684 :
685 1 : p = *vc->vc_uni_pagedir_loc;
686 1 : q = dfont_unitable;
687 :
688 257 : for (i = 0; i < 256; i++)
689 559 : for (j = dfont_unicount[i]; j; j--) {
690 303 : err1 = con_insert_unipair(p, *(q++), i);
691 303 : if (err1)
692 0 : err = err1;
693 : }
694 :
695 1 : if (con_unify_unimap(vc, p)) {
696 0 : dflt = *vc->vc_uni_pagedir_loc;
697 0 : return err;
698 : }
699 :
700 5 : for (i = 0; i <= 3; i++)
701 4 : set_inverse_transl(vc, p, i); /* Update all inverse translations */
702 1 : set_inverse_trans_unicode(vc, p);
703 1 : dflt = p;
704 1 : return err;
705 : }
706 : EXPORT_SYMBOL(con_set_default_unimap);
707 :
708 : /**
709 : * con_copy_unimap - copy unimap between two vts
710 : * @dst_vc: target
711 : * @src_vc: source
712 : *
713 : * The caller must hold the console lock when invoking this method
714 : */
715 0 : int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
716 : {
717 0 : struct uni_pagedir *q;
718 :
719 0 : if (!*src_vc->vc_uni_pagedir_loc)
720 : return -EINVAL;
721 0 : if (*dst_vc->vc_uni_pagedir_loc == *src_vc->vc_uni_pagedir_loc)
722 : return 0;
723 0 : con_free_unimap(dst_vc);
724 0 : q = *src_vc->vc_uni_pagedir_loc;
725 0 : q->refcount++;
726 0 : *dst_vc->vc_uni_pagedir_loc = q;
727 0 : return 0;
728 : }
729 : EXPORT_SYMBOL(con_copy_unimap);
730 :
731 : /*
732 : * con_get_unimap - get the unicode map
733 : *
734 : * Read the console unicode data for this console. Called from the ioctl
735 : * handlers.
736 : */
737 0 : int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list)
738 : {
739 0 : int i, j, k, ret = 0;
740 0 : ushort ect;
741 0 : u16 **p1, *p2;
742 0 : struct uni_pagedir *p;
743 0 : struct unipair *unilist;
744 :
745 0 : unilist = kvmalloc_array(ct, sizeof(struct unipair), GFP_KERNEL);
746 0 : if (!unilist)
747 : return -ENOMEM;
748 :
749 0 : console_lock();
750 :
751 0 : ect = 0;
752 0 : if (*vc->vc_uni_pagedir_loc) {
753 0 : p = *vc->vc_uni_pagedir_loc;
754 0 : for (i = 0; i < 32; i++) {
755 0 : p1 = p->uni_pgdir[i];
756 0 : if (p1)
757 0 : for (j = 0; j < 32; j++) {
758 0 : p2 = *(p1++);
759 0 : if (p2)
760 0 : for (k = 0; k < 64; k++, p2++) {
761 0 : if (*p2 >= MAX_GLYPH)
762 0 : continue;
763 0 : if (ect < ct) {
764 0 : unilist[ect].unicode =
765 0 : (i<<11)+(j<<6)+k;
766 0 : unilist[ect].fontpos = *p2;
767 : }
768 0 : ect++;
769 : }
770 : }
771 : }
772 : }
773 0 : console_unlock();
774 0 : if (copy_to_user(list, unilist, min(ect, ct) * sizeof(struct unipair)))
775 0 : ret = -EFAULT;
776 0 : put_user(ect, uct);
777 0 : kvfree(unilist);
778 0 : return ret ? ret : (ect <= ct) ? 0 : -ENOMEM;
779 : }
780 :
781 : /*
782 : * Always use USER_MAP. These functions are used by the keyboard,
783 : * which shouldn't be affected by G0/G1 switching, etc.
784 : * If the user map still contains default values, i.e. the
785 : * direct-to-font mapping, then assume user is using Latin1.
786 : *
787 : * FIXME: at some point we need to decide if we want to lock the table
788 : * update element itself via the keyboard_event_lock for consistency with the
789 : * keyboard driver as well as the consoles
790 : */
791 : /* may be called during an interrupt */
792 0 : u32 conv_8bit_to_uni(unsigned char c)
793 : {
794 0 : unsigned short uni = translations[USER_MAP][c];
795 0 : return uni == (0xf000 | c) ? c : uni;
796 : }
797 :
798 0 : int conv_uni_to_8bit(u32 uni)
799 : {
800 0 : int c;
801 0 : for (c = 0; c < 0x100; c++)
802 0 : if (translations[USER_MAP][c] == uni ||
803 0 : (translations[USER_MAP][c] == (c | 0xf000) && uni == c))
804 0 : return c;
805 : return -1;
806 : }
807 :
808 : int
809 1071 : conv_uni_to_pc(struct vc_data *conp, long ucs)
810 : {
811 1071 : int h;
812 1071 : u16 **p1, *p2;
813 1071 : struct uni_pagedir *p;
814 :
815 : /* Only 16-bit codes supported at this time */
816 1071 : if (ucs > 0xffff)
817 : return -4; /* Not found */
818 1071 : else if (ucs < 0x20)
819 : return -1; /* Not a printable character */
820 1006 : else if (ucs == 0xfeff || (ucs >= 0x200b && ucs <= 0x200f))
821 : return -2; /* Zero-width space */
822 : /*
823 : * UNI_DIRECT_BASE indicates the start of the region in the User Zone
824 : * which always has a 1:1 mapping to the currently loaded font. The
825 : * UNI_DIRECT_MASK indicates the bit span of the region.
826 : */
827 1006 : else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE)
828 256 : return ucs & UNI_DIRECT_MASK;
829 :
830 750 : if (!*conp->vc_uni_pagedir_loc)
831 : return -3;
832 :
833 750 : p = *conp->vc_uni_pagedir_loc;
834 750 : if ((p1 = p->uni_pgdir[ucs >> 11]) &&
835 750 : (p2 = p1[(ucs >> 6) & 0x1f]) &&
836 745 : (h = p2[ucs & 0x3f]) < MAX_GLYPH)
837 663 : return h;
838 :
839 : return -4; /* not found */
840 : }
841 :
842 : /*
843 : * This is called at sys_setup time, after memory and the console are
844 : * initialized. It must be possible to call kmalloc(..., GFP_KERNEL)
845 : * from this function, hence the call from sys_setup.
846 : */
847 : void __init
848 1 : console_map_init(void)
849 : {
850 1 : int i;
851 :
852 64 : for (i = 0; i < MAX_NR_CONSOLES; i++)
853 63 : if (vc_cons_allocated(i) && !*vc_cons[i].d->vc_uni_pagedir_loc)
854 1 : con_set_default_unimap(vc_cons[i].d);
855 1 : }
856 :
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