diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/tty/vt/consolemap.c | 857 |
1 files changed, 857 insertions, 0 deletions
diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c new file mode 100644 index 000000000..90c6e10b1 --- /dev/null +++ b/drivers/tty/vt/consolemap.c @@ -0,0 +1,857 @@ +// 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_sem --> cpu_hotplug.lock --> console_lock --> &mm->mmap_sem + * + * 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 << 20U) + 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 = memdup_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(); + kfree(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 = kmalloc_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); + kfree(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); +} + |