| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * consolemap.c |
| * |
| * Mapping from internal code (such as Latin-1 or Unicode or IBM PC code) |
| * to font positions. |
| * |
| * aeb, 950210 |
| * |
| * Support for multiple unimaps by Jakub Jelinek <jj@ultra.linux.cz>, July 1998 |
| * |
| * Fix bug in inverse translation. Stanislav Voronyi <stas@cnti.uanet.kharkov.ua>, Dec 1998 |
| * |
| * In order to prevent the following circular lock dependency: |
| * &mm->mmap_lock --> cpu_hotplug.lock --> console_lock --> &mm->mmap_lock |
| * |
| * We cannot allow page fault to happen while holding the console_lock. |
| * Therefore, all the userspace copy operations have to be done outside |
| * the console_lock critical sections. |
| * |
| * As all the affected functions are all called directly from vt_ioctl(), we |
| * can allocate some small buffers directly on stack without worrying about |
| * stack overflow. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kd.h> |
| #include <linux/errno.h> |
| #include <linux/mm.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/tty.h> |
| #include <linux/uaccess.h> |
| #include <linux/console.h> |
| #include <linux/consolemap.h> |
| #include <linux/vt_kern.h> |
| #include <linux/string.h> |
| |
| static unsigned short translations[][256] = { |
| /* 8-bit Latin-1 mapped to Unicode -- trivial mapping */ |
| { |
| 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, |
| 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, |
| 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, |
| 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f, |
| 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, |
| 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f, |
| 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, |
| 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, |
| 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, |
| 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, |
| 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, |
| 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, |
| 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, |
| 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f, |
| 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, |
| 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f, |
| 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, |
| 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f, |
| 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097, |
| 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f, |
| 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, |
| 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af, |
| 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7, |
| 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf, |
| 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7, |
| 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf, |
| 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, |
| 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, |
| 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, |
| 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, |
| 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, |
| 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff |
| }, |
| /* VT100 graphics mapped to Unicode */ |
| { |
| 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, |
| 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, |
| 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, |
| 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f, |
| 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, |
| 0x0028, 0x0029, 0x002a, 0x2192, 0x2190, 0x2191, 0x2193, 0x002f, |
| 0x2588, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, |
| 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, |
| 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, |
| 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, |
| 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, |
| 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x00a0, |
| 0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1, |
| 0x2591, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba, |
| 0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c, |
| 0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x007f, |
| 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, |
| 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f, |
| 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097, |
| 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f, |
| 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, |
| 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af, |
| 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7, |
| 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf, |
| 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7, |
| 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf, |
| 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, |
| 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, |
| 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, |
| 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, |
| 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, |
| 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff |
| }, |
| /* IBM Codepage 437 mapped to Unicode */ |
| { |
| 0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022, |
| 0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c, |
| 0x25b6, 0x25c0, 0x2195, 0x203c, 0x00b6, 0x00a7, 0x25ac, 0x21a8, |
| 0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc, |
| 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, |
| 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f, |
| 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, |
| 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, |
| 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, |
| 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, |
| 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, |
| 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, |
| 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, |
| 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f, |
| 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, |
| 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x2302, |
| 0x00c7, 0x00fc, 0x00e9, 0x00e2, 0x00e4, 0x00e0, 0x00e5, 0x00e7, |
| 0x00ea, 0x00eb, 0x00e8, 0x00ef, 0x00ee, 0x00ec, 0x00c4, 0x00c5, |
| 0x00c9, 0x00e6, 0x00c6, 0x00f4, 0x00f6, 0x00f2, 0x00fb, 0x00f9, |
| 0x00ff, 0x00d6, 0x00dc, 0x00a2, 0x00a3, 0x00a5, 0x20a7, 0x0192, |
| 0x00e1, 0x00ed, 0x00f3, 0x00fa, 0x00f1, 0x00d1, 0x00aa, 0x00ba, |
| 0x00bf, 0x2310, 0x00ac, 0x00bd, 0x00bc, 0x00a1, 0x00ab, 0x00bb, |
| 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556, |
| 0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510, |
| 0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f, |
| 0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567, |
| 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b, |
| 0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580, |
| 0x03b1, 0x00df, 0x0393, 0x03c0, 0x03a3, 0x03c3, 0x00b5, 0x03c4, |
| 0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229, |
| 0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248, |
| 0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0 |
| }, |
| /* User mapping -- default to codes for direct font mapping */ |
| { |
| 0xf000, 0xf001, 0xf002, 0xf003, 0xf004, 0xf005, 0xf006, 0xf007, |
| 0xf008, 0xf009, 0xf00a, 0xf00b, 0xf00c, 0xf00d, 0xf00e, 0xf00f, |
| 0xf010, 0xf011, 0xf012, 0xf013, 0xf014, 0xf015, 0xf016, 0xf017, |
| 0xf018, 0xf019, 0xf01a, 0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f, |
| 0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027, |
| 0xf028, 0xf029, 0xf02a, 0xf02b, 0xf02c, 0xf02d, 0xf02e, 0xf02f, |
| 0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037, |
| 0xf038, 0xf039, 0xf03a, 0xf03b, 0xf03c, 0xf03d, 0xf03e, 0xf03f, |
| 0xf040, 0xf041, 0xf042, 0xf043, 0xf044, 0xf045, 0xf046, 0xf047, |
| 0xf048, 0xf049, 0xf04a, 0xf04b, 0xf04c, 0xf04d, 0xf04e, 0xf04f, |
| 0xf050, 0xf051, 0xf052, 0xf053, 0xf054, 0xf055, 0xf056, 0xf057, |
| 0xf058, 0xf059, 0xf05a, 0xf05b, 0xf05c, 0xf05d, 0xf05e, 0xf05f, |
| 0xf060, 0xf061, 0xf062, 0xf063, 0xf064, 0xf065, 0xf066, 0xf067, |
| 0xf068, 0xf069, 0xf06a, 0xf06b, 0xf06c, 0xf06d, 0xf06e, 0xf06f, |
| 0xf070, 0xf071, 0xf072, 0xf073, 0xf074, 0xf075, 0xf076, 0xf077, |
| 0xf078, 0xf079, 0xf07a, 0xf07b, 0xf07c, 0xf07d, 0xf07e, 0xf07f, |
| 0xf080, 0xf081, 0xf082, 0xf083, 0xf084, 0xf085, 0xf086, 0xf087, |
| 0xf088, 0xf089, 0xf08a, 0xf08b, 0xf08c, 0xf08d, 0xf08e, 0xf08f, |
| 0xf090, 0xf091, 0xf092, 0xf093, 0xf094, 0xf095, 0xf096, 0xf097, |
| 0xf098, 0xf099, 0xf09a, 0xf09b, 0xf09c, 0xf09d, 0xf09e, 0xf09f, |
| 0xf0a0, 0xf0a1, 0xf0a2, 0xf0a3, 0xf0a4, 0xf0a5, 0xf0a6, 0xf0a7, |
| 0xf0a8, 0xf0a9, 0xf0aa, 0xf0ab, 0xf0ac, 0xf0ad, 0xf0ae, 0xf0af, |
| 0xf0b0, 0xf0b1, 0xf0b2, 0xf0b3, 0xf0b4, 0xf0b5, 0xf0b6, 0xf0b7, |
| 0xf0b8, 0xf0b9, 0xf0ba, 0xf0bb, 0xf0bc, 0xf0bd, 0xf0be, 0xf0bf, |
| 0xf0c0, 0xf0c1, 0xf0c2, 0xf0c3, 0xf0c4, 0xf0c5, 0xf0c6, 0xf0c7, |
| 0xf0c8, 0xf0c9, 0xf0ca, 0xf0cb, 0xf0cc, 0xf0cd, 0xf0ce, 0xf0cf, |
| 0xf0d0, 0xf0d1, 0xf0d2, 0xf0d3, 0xf0d4, 0xf0d5, 0xf0d6, 0xf0d7, |
| 0xf0d8, 0xf0d9, 0xf0da, 0xf0db, 0xf0dc, 0xf0dd, 0xf0de, 0xf0df, |
| 0xf0e0, 0xf0e1, 0xf0e2, 0xf0e3, 0xf0e4, 0xf0e5, 0xf0e6, 0xf0e7, |
| 0xf0e8, 0xf0e9, 0xf0ea, 0xf0eb, 0xf0ec, 0xf0ed, 0xf0ee, 0xf0ef, |
| 0xf0f0, 0xf0f1, 0xf0f2, 0xf0f3, 0xf0f4, 0xf0f5, 0xf0f6, 0xf0f7, |
| 0xf0f8, 0xf0f9, 0xf0fa, 0xf0fb, 0xf0fc, 0xf0fd, 0xf0fe, 0xf0ff |
| } |
| }; |
| |
| /* The standard kernel character-to-font mappings are not invertible |
| -- this is just a best effort. */ |
| |
| #define MAX_GLYPH 512 /* Max possible glyph value */ |
| |
| static int inv_translate[MAX_NR_CONSOLES]; |
| |
| struct uni_pagedir { |
| u16 **uni_pgdir[32]; |
| unsigned long refcount; |
| unsigned long sum; |
| unsigned char *inverse_translations[4]; |
| u16 *inverse_trans_unicode; |
| }; |
| |
| static struct uni_pagedir *dflt; |
| |
| static void set_inverse_transl(struct vc_data *conp, struct uni_pagedir *p, int i) |
| { |
| int j, glyph; |
| unsigned short *t = translations[i]; |
| unsigned char *q; |
| |
| if (!p) return; |
| q = p->inverse_translations[i]; |
| |
| if (!q) { |
| q = p->inverse_translations[i] = kmalloc(MAX_GLYPH, GFP_KERNEL); |
| if (!q) return; |
| } |
| memset(q, 0, MAX_GLYPH); |
| |
| for (j = 0; j < E_TABSZ; j++) { |
| glyph = conv_uni_to_pc(conp, t[j]); |
| if (glyph >= 0 && glyph < MAX_GLYPH && q[glyph] < 32) { |
| /* prefer '-' above SHY etc. */ |
| q[glyph] = j; |
| } |
| } |
| } |
| |
| static void set_inverse_trans_unicode(struct vc_data *conp, |
| struct uni_pagedir *p) |
| { |
| int i, j, k, glyph; |
| u16 **p1, *p2; |
| u16 *q; |
| |
| if (!p) return; |
| q = p->inverse_trans_unicode; |
| if (!q) { |
| q = p->inverse_trans_unicode = |
| kmalloc_array(MAX_GLYPH, sizeof(u16), GFP_KERNEL); |
| if (!q) |
| return; |
| } |
| memset(q, 0, MAX_GLYPH * sizeof(u16)); |
| |
| for (i = 0; i < 32; i++) { |
| p1 = p->uni_pgdir[i]; |
| if (!p1) |
| continue; |
| for (j = 0; j < 32; j++) { |
| p2 = p1[j]; |
| if (!p2) |
| continue; |
| for (k = 0; k < 64; k++) { |
| glyph = p2[k]; |
| if (glyph >= 0 && glyph < MAX_GLYPH |
| && q[glyph] < 32) |
| q[glyph] = (i << 11) + (j << 6) + k; |
| } |
| } |
| } |
| } |
| |
| unsigned short *set_translate(int m, struct vc_data *vc) |
| { |
| inv_translate[vc->vc_num] = m; |
| return translations[m]; |
| } |
| |
| /* |
| * Inverse translation is impossible for several reasons: |
| * 1. The font<->character maps are not 1-1. |
| * 2. The text may have been written while a different translation map |
| * was active. |
| * Still, it is now possible to a certain extent to cut and paste non-ASCII. |
| */ |
| u16 inverse_translate(struct vc_data *conp, int glyph, int use_unicode) |
| { |
| struct uni_pagedir *p; |
| int m; |
| if (glyph < 0 || glyph >= MAX_GLYPH) |
| return 0; |
| else { |
| p = *conp->vc_uni_pagedir_loc; |
| if (!p) |
| return glyph; |
| else if (use_unicode) { |
| if (!p->inverse_trans_unicode) |
| return glyph; |
| else |
| return p->inverse_trans_unicode[glyph]; |
| } else { |
| m = inv_translate[conp->vc_num]; |
| if (!p->inverse_translations[m]) |
| return glyph; |
| else |
| return p->inverse_translations[m][glyph]; |
| } |
| } |
| } |
| EXPORT_SYMBOL_GPL(inverse_translate); |
| |
| static void update_user_maps(void) |
| { |
| int i; |
| struct uni_pagedir *p, *q = NULL; |
| |
| for (i = 0; i < MAX_NR_CONSOLES; i++) { |
| if (!vc_cons_allocated(i)) |
| continue; |
| p = *vc_cons[i].d->vc_uni_pagedir_loc; |
| if (p && p != q) { |
| set_inverse_transl(vc_cons[i].d, p, USER_MAP); |
| set_inverse_trans_unicode(vc_cons[i].d, p); |
| q = p; |
| } |
| } |
| } |
| |
| /* |
| * Load customizable translation table |
| * arg points to a 256 byte translation table. |
| * |
| * The "old" variants are for translation directly to font (using the |
| * 0xf000-0xf0ff "transparent" Unicodes) whereas the "new" variants set |
| * Unicodes explicitly. |
| */ |
| int con_set_trans_old(unsigned char __user * arg) |
| { |
| int i; |
| unsigned short inbuf[E_TABSZ]; |
| unsigned char ubuf[E_TABSZ]; |
| |
| if (copy_from_user(ubuf, arg, E_TABSZ)) |
| return -EFAULT; |
| |
| for (i = 0; i < E_TABSZ ; i++) |
| inbuf[i] = UNI_DIRECT_BASE | ubuf[i]; |
| |
| console_lock(); |
| memcpy(translations[USER_MAP], inbuf, sizeof(inbuf)); |
| update_user_maps(); |
| console_unlock(); |
| return 0; |
| } |
| |
| int con_get_trans_old(unsigned char __user * arg) |
| { |
| int i, ch; |
| unsigned short *p = translations[USER_MAP]; |
| unsigned char outbuf[E_TABSZ]; |
| |
| console_lock(); |
| for (i = 0; i < E_TABSZ ; i++) |
| { |
| ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]); |
| outbuf[i] = (ch & ~0xff) ? 0 : ch; |
| } |
| console_unlock(); |
| |
| return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0; |
| } |
| |
| int con_set_trans_new(ushort __user * arg) |
| { |
| unsigned short inbuf[E_TABSZ]; |
| |
| if (copy_from_user(inbuf, arg, sizeof(inbuf))) |
| return -EFAULT; |
| |
| console_lock(); |
| memcpy(translations[USER_MAP], inbuf, sizeof(inbuf)); |
| update_user_maps(); |
| console_unlock(); |
| return 0; |
| } |
| |
| int con_get_trans_new(ushort __user * arg) |
| { |
| unsigned short outbuf[E_TABSZ]; |
| |
| console_lock(); |
| memcpy(outbuf, translations[USER_MAP], sizeof(outbuf)); |
| console_unlock(); |
| |
| return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0; |
| } |
| |
| /* |
| * Unicode -> current font conversion |
| * |
| * A font has at most 512 chars, usually 256. |
| * But one font position may represent several Unicode chars. |
| * A hashtable is somewhat of a pain to deal with, so use a |
| * "paged table" instead. Simulation has shown the memory cost of |
| * this 3-level paged table scheme to be comparable to a hash table. |
| */ |
| |
| extern u8 dfont_unicount[]; /* Defined in console_defmap.c */ |
| extern u16 dfont_unitable[]; |
| |
| static void con_release_unimap(struct uni_pagedir *p) |
| { |
| u16 **p1; |
| int i, j; |
| |
| if (p == dflt) dflt = NULL; |
| for (i = 0; i < 32; i++) { |
| p1 = p->uni_pgdir[i]; |
| if (p1 != NULL) { |
| for (j = 0; j < 32; j++) |
| kfree(p1[j]); |
| kfree(p1); |
| } |
| p->uni_pgdir[i] = NULL; |
| } |
| for (i = 0; i < 4; i++) { |
| kfree(p->inverse_translations[i]); |
| p->inverse_translations[i] = NULL; |
| } |
| kfree(p->inverse_trans_unicode); |
| p->inverse_trans_unicode = NULL; |
| } |
| |
| /* Caller must hold the console lock */ |
| void con_free_unimap(struct vc_data *vc) |
| { |
| struct uni_pagedir *p; |
| |
| p = *vc->vc_uni_pagedir_loc; |
| if (!p) |
| return; |
| *vc->vc_uni_pagedir_loc = NULL; |
| if (--p->refcount) |
| return; |
| con_release_unimap(p); |
| kfree(p); |
| } |
| |
| static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p) |
| { |
| int i, j, k; |
| struct uni_pagedir *q; |
| |
| for (i = 0; i < MAX_NR_CONSOLES; i++) { |
| if (!vc_cons_allocated(i)) |
| continue; |
| q = *vc_cons[i].d->vc_uni_pagedir_loc; |
| if (!q || q == p || q->sum != p->sum) |
| continue; |
| for (j = 0; j < 32; j++) { |
| u16 **p1, **q1; |
| p1 = p->uni_pgdir[j]; q1 = q->uni_pgdir[j]; |
| if (!p1 && !q1) |
| continue; |
| if (!p1 || !q1) |
| break; |
| for (k = 0; k < 32; k++) { |
| if (!p1[k] && !q1[k]) |
| continue; |
| if (!p1[k] || !q1[k]) |
| break; |
| if (memcmp(p1[k], q1[k], 64*sizeof(u16))) |
| break; |
| } |
| if (k < 32) |
| break; |
| } |
| if (j == 32) { |
| q->refcount++; |
| *conp->vc_uni_pagedir_loc = q; |
| con_release_unimap(p); |
| kfree(p); |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| static int |
| con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos) |
| { |
| int i, n; |
| u16 **p1, *p2; |
| |
| p1 = p->uni_pgdir[n = unicode >> 11]; |
| if (!p1) { |
| p1 = p->uni_pgdir[n] = kmalloc_array(32, sizeof(u16 *), |
| GFP_KERNEL); |
| if (!p1) return -ENOMEM; |
| for (i = 0; i < 32; i++) |
| p1[i] = NULL; |
| } |
| |
| p2 = p1[n = (unicode >> 6) & 0x1f]; |
| if (!p2) { |
| p2 = p1[n] = kmalloc_array(64, sizeof(u16), GFP_KERNEL); |
| if (!p2) return -ENOMEM; |
| memset(p2, 0xff, 64*sizeof(u16)); /* No glyphs for the characters (yet) */ |
| } |
| |
| p2[unicode & 0x3f] = fontpos; |
| |
| p->sum += (fontpos << 20) + unicode; |
| |
| return 0; |
| } |
| |
| /* Caller must hold the lock */ |
| static int con_do_clear_unimap(struct vc_data *vc) |
| { |
| struct uni_pagedir *p, *q; |
| |
| p = *vc->vc_uni_pagedir_loc; |
| if (!p || --p->refcount) { |
| q = kzalloc(sizeof(*p), GFP_KERNEL); |
| if (!q) { |
| if (p) |
| p->refcount++; |
| return -ENOMEM; |
| } |
| q->refcount=1; |
| *vc->vc_uni_pagedir_loc = q; |
| } else { |
| if (p == dflt) dflt = NULL; |
| p->refcount++; |
| p->sum = 0; |
| con_release_unimap(p); |
| } |
| return 0; |
| } |
| |
| int con_clear_unimap(struct vc_data *vc) |
| { |
| int ret; |
| console_lock(); |
| ret = con_do_clear_unimap(vc); |
| console_unlock(); |
| return ret; |
| } |
| |
| int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list) |
| { |
| int err = 0, err1, i; |
| struct uni_pagedir *p, *q; |
| struct unipair *unilist, *plist; |
| |
| if (!ct) |
| return 0; |
| |
| unilist = vmemdup_user(list, ct * sizeof(struct unipair)); |
| if (IS_ERR(unilist)) |
| return PTR_ERR(unilist); |
| |
| console_lock(); |
| |
| /* Save original vc_unipagdir_loc in case we allocate a new one */ |
| p = *vc->vc_uni_pagedir_loc; |
| |
| if (!p) { |
| err = -EINVAL; |
| |
| goto out_unlock; |
| } |
| |
| if (p->refcount > 1) { |
| int j, k; |
| u16 **p1, *p2, l; |
| |
| err1 = con_do_clear_unimap(vc); |
| if (err1) { |
| err = err1; |
| goto out_unlock; |
| } |
| |
| /* |
| * Since refcount was > 1, con_clear_unimap() allocated a |
| * a new uni_pagedir for this vc. Re: p != q |
| */ |
| q = *vc->vc_uni_pagedir_loc; |
| |
| /* |
| * uni_pgdir is a 32*32*64 table with rows allocated |
| * when its first entry is added. The unicode value must |
| * still be incremented for empty rows. We are copying |
| * entries from "p" (old) to "q" (new). |
| */ |
| l = 0; /* unicode value */ |
| for (i = 0; i < 32; i++) { |
| p1 = p->uni_pgdir[i]; |
| if (p1) |
| for (j = 0; j < 32; j++) { |
| p2 = p1[j]; |
| if (p2) { |
| for (k = 0; k < 64; k++, l++) |
| if (p2[k] != 0xffff) { |
| /* |
| * Found one, copy entry for unicode |
| * l with fontpos value p2[k]. |
| */ |
| err1 = con_insert_unipair(q, l, p2[k]); |
| if (err1) { |
| p->refcount++; |
| *vc->vc_uni_pagedir_loc = p; |
| con_release_unimap(q); |
| kfree(q); |
| err = err1; |
| goto out_unlock; |
| } |
| } |
| } else { |
| /* Account for row of 64 empty entries */ |
| l += 64; |
| } |
| } |
| else |
| /* Account for empty table */ |
| l += 32 * 64; |
| } |
| |
| /* |
| * Finished copying font table, set vc_uni_pagedir to new table |
| */ |
| p = q; |
| } else if (p == dflt) { |
| dflt = NULL; |
| } |
| |
| /* |
| * Insert user specified unicode pairs into new table. |
| */ |
| for (plist = unilist; ct; ct--, plist++) { |
| err1 = con_insert_unipair(p, plist->unicode, plist->fontpos); |
| if (err1) |
| err = err1; |
| } |
| |
| /* |
| * Merge with fontmaps of any other virtual consoles. |
| */ |
| if (con_unify_unimap(vc, p)) |
| goto out_unlock; |
| |
| for (i = 0; i <= 3; i++) |
| set_inverse_transl(vc, p, i); /* Update inverse translations */ |
| set_inverse_trans_unicode(vc, p); |
| |
| out_unlock: |
| console_unlock(); |
| kvfree(unilist); |
| return err; |
| } |
| |
| /** |
| * con_set_default_unimap - set default unicode map |
| * @vc: the console we are updating |
| * |
| * Loads the unimap for the hardware font, as defined in uni_hash.tbl. |
| * The representation used was the most compact I could come up |
| * with. This routine is executed at video setup, and when the |
| * PIO_FONTRESET ioctl is called. |
| * |
| * The caller must hold the console lock |
| */ |
| int con_set_default_unimap(struct vc_data *vc) |
| { |
| int i, j, err = 0, err1; |
| u16 *q; |
| struct uni_pagedir *p; |
| |
| if (dflt) { |
| p = *vc->vc_uni_pagedir_loc; |
| if (p == dflt) |
| return 0; |
| |
| dflt->refcount++; |
| *vc->vc_uni_pagedir_loc = dflt; |
| if (p && !--p->refcount) { |
| con_release_unimap(p); |
| kfree(p); |
| } |
| return 0; |
| } |
| |
| /* The default font is always 256 characters */ |
| |
| err = con_do_clear_unimap(vc); |
| if (err) |
| return err; |
| |
| p = *vc->vc_uni_pagedir_loc; |
| q = dfont_unitable; |
| |
| for (i = 0; i < 256; i++) |
| for (j = dfont_unicount[i]; j; j--) { |
| err1 = con_insert_unipair(p, *(q++), i); |
| if (err1) |
| err = err1; |
| } |
| |
| if (con_unify_unimap(vc, p)) { |
| dflt = *vc->vc_uni_pagedir_loc; |
| return err; |
| } |
| |
| for (i = 0; i <= 3; i++) |
| set_inverse_transl(vc, p, i); /* Update all inverse translations */ |
| set_inverse_trans_unicode(vc, p); |
| dflt = p; |
| return err; |
| } |
| EXPORT_SYMBOL(con_set_default_unimap); |
| |
| /** |
| * con_copy_unimap - copy unimap between two vts |
| * @dst_vc: target |
| * @src_vt: source |
| * |
| * The caller must hold the console lock when invoking this method |
| */ |
| int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc) |
| { |
| struct uni_pagedir *q; |
| |
| if (!*src_vc->vc_uni_pagedir_loc) |
| return -EINVAL; |
| if (*dst_vc->vc_uni_pagedir_loc == *src_vc->vc_uni_pagedir_loc) |
| return 0; |
| con_free_unimap(dst_vc); |
| q = *src_vc->vc_uni_pagedir_loc; |
| q->refcount++; |
| *dst_vc->vc_uni_pagedir_loc = q; |
| return 0; |
| } |
| EXPORT_SYMBOL(con_copy_unimap); |
| |
| /** |
| * con_get_unimap - get the unicode map |
| * @vc: the console to read from |
| * |
| * Read the console unicode data for this console. Called from the ioctl |
| * handlers. |
| */ |
| int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list) |
| { |
| int i, j, k, ret = 0; |
| ushort ect; |
| u16 **p1, *p2; |
| struct uni_pagedir *p; |
| struct unipair *unilist; |
| |
| unilist = kvmalloc_array(ct, sizeof(struct unipair), GFP_KERNEL); |
| if (!unilist) |
| return -ENOMEM; |
| |
| console_lock(); |
| |
| ect = 0; |
| if (*vc->vc_uni_pagedir_loc) { |
| p = *vc->vc_uni_pagedir_loc; |
| for (i = 0; i < 32; i++) { |
| p1 = p->uni_pgdir[i]; |
| if (p1) |
| for (j = 0; j < 32; j++) { |
| p2 = *(p1++); |
| if (p2) |
| for (k = 0; k < 64; k++, p2++) { |
| if (*p2 >= MAX_GLYPH) |
| continue; |
| if (ect < ct) { |
| unilist[ect].unicode = |
| (i<<11)+(j<<6)+k; |
| unilist[ect].fontpos = *p2; |
| } |
| ect++; |
| } |
| } |
| } |
| } |
| console_unlock(); |
| if (copy_to_user(list, unilist, min(ect, ct) * sizeof(struct unipair))) |
| ret = -EFAULT; |
| put_user(ect, uct); |
| kvfree(unilist); |
| return ret ? ret : (ect <= ct) ? 0 : -ENOMEM; |
| } |
| |
| /* |
| * Always use USER_MAP. These functions are used by the keyboard, |
| * which shouldn't be affected by G0/G1 switching, etc. |
| * If the user map still contains default values, i.e. the |
| * direct-to-font mapping, then assume user is using Latin1. |
| * |
| * FIXME: at some point we need to decide if we want to lock the table |
| * update element itself via the keyboard_event_lock for consistency with the |
| * keyboard driver as well as the consoles |
| */ |
| /* may be called during an interrupt */ |
| u32 conv_8bit_to_uni(unsigned char c) |
| { |
| unsigned short uni = translations[USER_MAP][c]; |
| return uni == (0xf000 | c) ? c : uni; |
| } |
| |
| int conv_uni_to_8bit(u32 uni) |
| { |
| int c; |
| for (c = 0; c < 0x100; c++) |
| if (translations[USER_MAP][c] == uni || |
| (translations[USER_MAP][c] == (c | 0xf000) && uni == c)) |
| return c; |
| return -1; |
| } |
| |
| int |
| conv_uni_to_pc(struct vc_data *conp, long ucs) |
| { |
| int h; |
| u16 **p1, *p2; |
| struct uni_pagedir *p; |
| |
| /* Only 16-bit codes supported at this time */ |
| if (ucs > 0xffff) |
| return -4; /* Not found */ |
| else if (ucs < 0x20) |
| return -1; /* Not a printable character */ |
| else if (ucs == 0xfeff || (ucs >= 0x200b && ucs <= 0x200f)) |
| return -2; /* Zero-width space */ |
| /* |
| * UNI_DIRECT_BASE indicates the start of the region in the User Zone |
| * which always has a 1:1 mapping to the currently loaded font. The |
| * UNI_DIRECT_MASK indicates the bit span of the region. |
| */ |
| else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE) |
| return ucs & UNI_DIRECT_MASK; |
| |
| if (!*conp->vc_uni_pagedir_loc) |
| return -3; |
| |
| p = *conp->vc_uni_pagedir_loc; |
| if ((p1 = p->uni_pgdir[ucs >> 11]) && |
| (p2 = p1[(ucs >> 6) & 0x1f]) && |
| (h = p2[ucs & 0x3f]) < MAX_GLYPH) |
| return h; |
| |
| return -4; /* not found */ |
| } |
| |
| /* |
| * This is called at sys_setup time, after memory and the console are |
| * initialized. It must be possible to call kmalloc(..., GFP_KERNEL) |
| * from this function, hence the call from sys_setup. |
| */ |
| void __init |
| console_map_init(void) |
| { |
| int i; |
| |
| for (i = 0; i < MAX_NR_CONSOLES; i++) |
| if (vc_cons_allocated(i) && !*vc_cons[i].d->vc_uni_pagedir_loc) |
| con_set_default_unimap(vc_cons[i].d); |
| } |
| |