linux/scripts/mod/file2alias.c
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   1/* Simple code to turn various tables in an ELF file into alias definitions.
   2 * This deals with kernel datastructures where they should be
   3 * dealt with: in the kernel source.
   4 *
   5 * Copyright 2002-2003  Rusty Russell, IBM Corporation
   6 *           2003       Kai Germaschewski
   7 *
   8 *
   9 * This software may be used and distributed according to the terms
  10 * of the GNU General Public License, incorporated herein by reference.
  11 */
  12
  13#include "modpost.h"
  14
  15/* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
  16 * use either stdint.h or inttypes.h for the rest. */
  17#if KERNEL_ELFCLASS == ELFCLASS32
  18typedef Elf32_Addr      kernel_ulong_t;
  19#define BITS_PER_LONG 32
  20#else
  21typedef Elf64_Addr      kernel_ulong_t;
  22#define BITS_PER_LONG 64
  23#endif
  24#ifdef __sun__
  25#include <inttypes.h>
  26#else
  27#include <stdint.h>
  28#endif
  29
  30#include <ctype.h>
  31
  32typedef uint32_t        __u32;
  33typedef uint16_t        __u16;
  34typedef unsigned char   __u8;
  35
  36/* Big exception to the "don't include kernel headers into userspace, which
  37 * even potentially has different endianness and word sizes, since
  38 * we handle those differences explicitly below */
  39#include "../../include/linux/mod_devicetable.h"
  40
  41#define ADD(str, sep, cond, field)                              \
  42do {                                                            \
  43        strcat(str, sep);                                       \
  44        if (cond)                                               \
  45                sprintf(str + strlen(str),                      \
  46                        sizeof(field) == 1 ? "%02X" :           \
  47                        sizeof(field) == 2 ? "%04X" :           \
  48                        sizeof(field) == 4 ? "%08X" : "",       \
  49                        field);                                 \
  50        else                                                    \
  51                sprintf(str + strlen(str), "*");                \
  52} while(0)
  53
  54/* Always end in a wildcard, for future extension */
  55static inline void add_wildcard(char *str)
  56{
  57        int len = strlen(str);
  58
  59        if (str[len - 1] != '*')
  60                strcat(str + len, "*");
  61}
  62
  63unsigned int cross_build = 0;
  64/**
  65 * Check that sizeof(device_id type) are consistent with size of section
  66 * in .o file. If in-consistent then userspace and kernel does not agree
  67 * on actual size which is a bug.
  68 * Also verify that the final entry in the table is all zeros.
  69 * Ignore both checks if build host differ from target host and size differs.
  70 **/
  71static void device_id_check(const char *modname, const char *device_id,
  72                            unsigned long size, unsigned long id_size,
  73                            void *symval)
  74{
  75        int i;
  76
  77        if (size % id_size || size < id_size) {
  78                if (cross_build != 0)
  79                        return;
  80                fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
  81                      "of the size of section __mod_%s_device_table=%lu.\n"
  82                      "Fix definition of struct %s_device_id "
  83                      "in mod_devicetable.h\n",
  84                      modname, device_id, id_size, device_id, size, device_id);
  85        }
  86        /* Verify last one is a terminator */
  87        for (i = 0; i < id_size; i++ ) {
  88                if (*(uint8_t*)(symval+size-id_size+i)) {
  89                        fprintf(stderr,"%s: struct %s_device_id is %lu bytes.  "
  90                                "The last of %lu is:\n",
  91                                modname, device_id, id_size, size / id_size);
  92                        for (i = 0; i < id_size; i++ )
  93                                fprintf(stderr,"0x%02x ",
  94                                        *(uint8_t*)(symval+size-id_size+i) );
  95                        fprintf(stderr,"\n");
  96                        fatal("%s: struct %s_device_id is not terminated "
  97                                "with a NULL entry!\n", modname, device_id);
  98                }
  99        }
 100}
 101
 102/* USB is special because the bcdDevice can be matched against a numeric range */
 103/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipN" */
 104static void do_usb_entry(struct usb_device_id *id,
 105                         unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
 106                         unsigned char range_lo, unsigned char range_hi,
 107                         unsigned char max, struct module *mod)
 108{
 109        char alias[500];
 110        strcpy(alias, "usb:");
 111        ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR,
 112            id->idVendor);
 113        ADD(alias, "p", id->match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
 114            id->idProduct);
 115
 116        strcat(alias, "d");
 117        if (bcdDevice_initial_digits)
 118                sprintf(alias + strlen(alias), "%0*X",
 119                        bcdDevice_initial_digits, bcdDevice_initial);
 120        if (range_lo == range_hi)
 121                sprintf(alias + strlen(alias), "%X", range_lo);
 122        else if (range_lo > 0 || range_hi < max) {
 123                if (range_lo > 0x9 || range_hi < 0xA)
 124                        sprintf(alias + strlen(alias),
 125                                "[%X-%X]",
 126                                range_lo,
 127                                range_hi);
 128                else {
 129                        sprintf(alias + strlen(alias),
 130                                range_lo < 0x9 ? "[%X-9" : "[%X",
 131                                range_lo);
 132                        sprintf(alias + strlen(alias),
 133                                range_hi > 0xA ? "a-%X]" : "%X]",
 134                                range_lo);
 135                }
 136        }
 137        if (bcdDevice_initial_digits < (sizeof(id->bcdDevice_lo) * 2 - 1))
 138                strcat(alias, "*");
 139
 140        ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
 141            id->bDeviceClass);
 142        ADD(alias, "dsc",
 143            id->match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
 144            id->bDeviceSubClass);
 145        ADD(alias, "dp",
 146            id->match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
 147            id->bDeviceProtocol);
 148        ADD(alias, "ic",
 149            id->match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
 150            id->bInterfaceClass);
 151        ADD(alias, "isc",
 152            id->match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
 153            id->bInterfaceSubClass);
 154        ADD(alias, "ip",
 155            id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
 156            id->bInterfaceProtocol);
 157
 158        add_wildcard(alias);
 159        buf_printf(&mod->dev_table_buf,
 160                   "MODULE_ALIAS(\"%s\");\n", alias);
 161}
 162
 163/* Handles increment/decrement of BCD formatted integers */
 164/* Returns the previous value, so it works like i++ or i-- */
 165static unsigned int incbcd(unsigned int *bcd,
 166                           int inc,
 167                           unsigned char max,
 168                           size_t chars)
 169{
 170        unsigned int init = *bcd, i, j;
 171        unsigned long long c, dec = 0;
 172
 173        /* If bcd is not in BCD format, just increment */
 174        if (max > 0x9) {
 175                *bcd += inc;
 176                return init;
 177        }
 178
 179        /* Convert BCD to Decimal */
 180        for (i=0 ; i < chars ; i++) {
 181                c = (*bcd >> (i << 2)) & 0xf;
 182                c = c > 9 ? 9 : c; /* force to bcd just in case */
 183                for (j=0 ; j < i ; j++)
 184                        c = c * 10;
 185                dec += c;
 186        }
 187
 188        /* Do our increment/decrement */
 189        dec += inc;
 190        *bcd  = 0;
 191
 192        /* Convert back to BCD */
 193        for (i=0 ; i < chars ; i++) {
 194                for (c=1,j=0 ; j < i ; j++)
 195                        c = c * 10;
 196                c = (dec / c) % 10;
 197                *bcd += c << (i << 2);
 198        }
 199        return init;
 200}
 201
 202static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod)
 203{
 204        unsigned int devlo, devhi;
 205        unsigned char chi, clo, max;
 206        int ndigits;
 207
 208        id->match_flags = TO_NATIVE(id->match_flags);
 209        id->idVendor = TO_NATIVE(id->idVendor);
 210        id->idProduct = TO_NATIVE(id->idProduct);
 211
 212        devlo = id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
 213                TO_NATIVE(id->bcdDevice_lo) : 0x0U;
 214        devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
 215                TO_NATIVE(id->bcdDevice_hi) : ~0x0U;
 216
 217        /* Figure out if this entry is in bcd or hex format */
 218        max = 0x9; /* Default to decimal format */
 219        for (ndigits = 0 ; ndigits < sizeof(id->bcdDevice_lo) * 2 ; ndigits++) {
 220                clo = (devlo >> (ndigits << 2)) & 0xf;
 221                chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
 222                if (clo > max || chi > max) {
 223                        max = 0xf;
 224                        break;
 225                }
 226        }
 227
 228        /*
 229         * Some modules (visor) have empty slots as placeholder for
 230         * run-time specification that results in catch-all alias
 231         */
 232        if (!(id->idVendor | id->idProduct | id->bDeviceClass | id->bInterfaceClass))
 233                return;
 234
 235        /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
 236        for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
 237                clo = devlo & 0xf;
 238                chi = devhi & 0xf;
 239                if (chi > max)  /* If we are in bcd mode, truncate if necessary */
 240                        chi = max;
 241                devlo >>= 4;
 242                devhi >>= 4;
 243
 244                if (devlo == devhi || !ndigits) {
 245                        do_usb_entry(id, devlo, ndigits, clo, chi, max, mod);
 246                        break;
 247                }
 248
 249                if (clo > 0x0)
 250                        do_usb_entry(id,
 251                                     incbcd(&devlo, 1, max,
 252                                            sizeof(id->bcdDevice_lo) * 2),
 253                                     ndigits, clo, max, max, mod);
 254
 255                if (chi < max)
 256                        do_usb_entry(id,
 257                                     incbcd(&devhi, -1, max,
 258                                            sizeof(id->bcdDevice_lo) * 2),
 259                                     ndigits, 0x0, chi, max, mod);
 260        }
 261}
 262
 263static void do_usb_table(void *symval, unsigned long size,
 264                         struct module *mod)
 265{
 266        unsigned int i;
 267        const unsigned long id_size = sizeof(struct usb_device_id);
 268
 269        device_id_check(mod->name, "usb", size, id_size, symval);
 270
 271        /* Leave last one: it's the terminator. */
 272        size -= id_size;
 273
 274        for (i = 0; i < size; i += id_size)
 275                do_usb_entry_multi(symval + i, mod);
 276}
 277
 278/* Looks like: hid:bNvNpN */
 279static int do_hid_entry(const char *filename,
 280                             struct hid_device_id *id, char *alias)
 281{
 282        id->bus = TO_NATIVE(id->bus);
 283        id->vendor = TO_NATIVE(id->vendor);
 284        id->product = TO_NATIVE(id->product);
 285
 286        sprintf(alias, "hid:b%04X", id->bus);
 287        ADD(alias, "v", id->vendor != HID_ANY_ID, id->vendor);
 288        ADD(alias, "p", id->product != HID_ANY_ID, id->product);
 289
 290        return 1;
 291}
 292
 293/* Looks like: ieee1394:venNmoNspNverN */
 294static int do_ieee1394_entry(const char *filename,
 295                             struct ieee1394_device_id *id, char *alias)
 296{
 297        id->match_flags = TO_NATIVE(id->match_flags);
 298        id->vendor_id = TO_NATIVE(id->vendor_id);
 299        id->model_id = TO_NATIVE(id->model_id);
 300        id->specifier_id = TO_NATIVE(id->specifier_id);
 301        id->version = TO_NATIVE(id->version);
 302
 303        strcpy(alias, "ieee1394:");
 304        ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID,
 305            id->vendor_id);
 306        ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID,
 307            id->model_id);
 308        ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID,
 309            id->specifier_id);
 310        ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION,
 311            id->version);
 312
 313        add_wildcard(alias);
 314        return 1;
 315}
 316
 317/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
 318static int do_pci_entry(const char *filename,
 319                        struct pci_device_id *id, char *alias)
 320{
 321        /* Class field can be divided into these three. */
 322        unsigned char baseclass, subclass, interface,
 323                baseclass_mask, subclass_mask, interface_mask;
 324
 325        id->vendor = TO_NATIVE(id->vendor);
 326        id->device = TO_NATIVE(id->device);
 327        id->subvendor = TO_NATIVE(id->subvendor);
 328        id->subdevice = TO_NATIVE(id->subdevice);
 329        id->class = TO_NATIVE(id->class);
 330        id->class_mask = TO_NATIVE(id->class_mask);
 331
 332        strcpy(alias, "pci:");
 333        ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor);
 334        ADD(alias, "d", id->device != PCI_ANY_ID, id->device);
 335        ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor);
 336        ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice);
 337
 338        baseclass = (id->class) >> 16;
 339        baseclass_mask = (id->class_mask) >> 16;
 340        subclass = (id->class) >> 8;
 341        subclass_mask = (id->class_mask) >> 8;
 342        interface = id->class;
 343        interface_mask = id->class_mask;
 344
 345        if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
 346            || (subclass_mask != 0 && subclass_mask != 0xFF)
 347            || (interface_mask != 0 && interface_mask != 0xFF)) {
 348                warn("Can't handle masks in %s:%04X\n",
 349                     filename, id->class_mask);
 350                return 0;
 351        }
 352
 353        ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
 354        ADD(alias, "sc", subclass_mask == 0xFF, subclass);
 355        ADD(alias, "i", interface_mask == 0xFF, interface);
 356        add_wildcard(alias);
 357        return 1;
 358}
 359
 360/* looks like: "ccw:tNmNdtNdmN" */
 361static int do_ccw_entry(const char *filename,
 362                        struct ccw_device_id *id, char *alias)
 363{
 364        id->match_flags = TO_NATIVE(id->match_flags);
 365        id->cu_type = TO_NATIVE(id->cu_type);
 366        id->cu_model = TO_NATIVE(id->cu_model);
 367        id->dev_type = TO_NATIVE(id->dev_type);
 368        id->dev_model = TO_NATIVE(id->dev_model);
 369
 370        strcpy(alias, "ccw:");
 371        ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
 372            id->cu_type);
 373        ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
 374            id->cu_model);
 375        ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
 376            id->dev_type);
 377        ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
 378            id->dev_model);
 379        add_wildcard(alias);
 380        return 1;
 381}
 382
 383/* looks like: "ap:tN" */
 384static int do_ap_entry(const char *filename,
 385                       struct ap_device_id *id, char *alias)
 386{
 387        sprintf(alias, "ap:t%02X*", id->dev_type);
 388        return 1;
 389}
 390
 391/* looks like: "css:tN" */
 392static int do_css_entry(const char *filename,
 393                        struct css_device_id *id, char *alias)
 394{
 395        sprintf(alias, "css:t%01X", id->type);
 396        return 1;
 397}
 398
 399/* Looks like: "serio:tyNprNidNexN" */
 400static int do_serio_entry(const char *filename,
 401                          struct serio_device_id *id, char *alias)
 402{
 403        id->type = TO_NATIVE(id->type);
 404        id->proto = TO_NATIVE(id->proto);
 405        id->id = TO_NATIVE(id->id);
 406        id->extra = TO_NATIVE(id->extra);
 407
 408        strcpy(alias, "serio:");
 409        ADD(alias, "ty", id->type != SERIO_ANY, id->type);
 410        ADD(alias, "pr", id->proto != SERIO_ANY, id->proto);
 411        ADD(alias, "id", id->id != SERIO_ANY, id->id);
 412        ADD(alias, "ex", id->extra != SERIO_ANY, id->extra);
 413
 414        add_wildcard(alias);
 415        return 1;
 416}
 417
 418/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
 419static int do_acpi_entry(const char *filename,
 420                        struct acpi_device_id *id, char *alias)
 421{
 422        sprintf(alias, "acpi*:%s:*", id->id);
 423        return 1;
 424}
 425
 426/* looks like: "pnp:dD" */
 427static void do_pnp_device_entry(void *symval, unsigned long size,
 428                                struct module *mod)
 429{
 430        const unsigned long id_size = sizeof(struct pnp_device_id);
 431        const unsigned int count = (size / id_size)-1;
 432        const struct pnp_device_id *devs = symval;
 433        unsigned int i;
 434
 435        device_id_check(mod->name, "pnp", size, id_size, symval);
 436
 437        for (i = 0; i < count; i++) {
 438                const char *id = (char *)devs[i].id;
 439                char acpi_id[sizeof(devs[0].id)];
 440                int j;
 441
 442                buf_printf(&mod->dev_table_buf,
 443                           "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 444
 445                /* fix broken pnp bus lowercasing */
 446                for (j = 0; j < sizeof(acpi_id); j++)
 447                        acpi_id[j] = toupper(id[j]);
 448                buf_printf(&mod->dev_table_buf,
 449                           "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 450        }
 451}
 452
 453/* looks like: "pnp:dD" for every device of the card */
 454static void do_pnp_card_entries(void *symval, unsigned long size,
 455                                struct module *mod)
 456{
 457        const unsigned long id_size = sizeof(struct pnp_card_device_id);
 458        const unsigned int count = (size / id_size)-1;
 459        const struct pnp_card_device_id *cards = symval;
 460        unsigned int i;
 461
 462        device_id_check(mod->name, "pnp", size, id_size, symval);
 463
 464        for (i = 0; i < count; i++) {
 465                unsigned int j;
 466                const struct pnp_card_device_id *card = &cards[i];
 467
 468                for (j = 0; j < PNP_MAX_DEVICES; j++) {
 469                        const char *id = (char *)card->devs[j].id;
 470                        int i2, j2;
 471                        int dup = 0;
 472
 473                        if (!id[0])
 474                                break;
 475
 476                        /* find duplicate, already added value */
 477                        for (i2 = 0; i2 < i && !dup; i2++) {
 478                                const struct pnp_card_device_id *card2 = &cards[i2];
 479
 480                                for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
 481                                        const char *id2 = (char *)card2->devs[j2].id;
 482
 483                                        if (!id2[0])
 484                                                break;
 485
 486                                        if (!strcmp(id, id2)) {
 487                                                dup = 1;
 488                                                break;
 489                                        }
 490                                }
 491                        }
 492
 493                        /* add an individual alias for every device entry */
 494                        if (!dup) {
 495                                char acpi_id[sizeof(card->devs[0].id)];
 496                                int k;
 497
 498                                buf_printf(&mod->dev_table_buf,
 499                                           "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 500
 501                                /* fix broken pnp bus lowercasing */
 502                                for (k = 0; k < sizeof(acpi_id); k++)
 503                                        acpi_id[k] = toupper(id[k]);
 504                                buf_printf(&mod->dev_table_buf,
 505                                           "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 506                        }
 507                }
 508        }
 509}
 510
 511/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
 512static int do_pcmcia_entry(const char *filename,
 513                           struct pcmcia_device_id *id, char *alias)
 514{
 515        unsigned int i;
 516
 517        id->match_flags = TO_NATIVE(id->match_flags);
 518        id->manf_id = TO_NATIVE(id->manf_id);
 519        id->card_id = TO_NATIVE(id->card_id);
 520        id->func_id = TO_NATIVE(id->func_id);
 521        id->function = TO_NATIVE(id->function);
 522        id->device_no = TO_NATIVE(id->device_no);
 523
 524        for (i=0; i<4; i++) {
 525                id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]);
 526       }
 527
 528       strcpy(alias, "pcmcia:");
 529       ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
 530           id->manf_id);
 531       ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
 532           id->card_id);
 533       ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
 534           id->func_id);
 535       ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
 536           id->function);
 537       ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
 538           id->device_no);
 539       ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]);
 540       ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]);
 541       ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]);
 542       ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]);
 543
 544        add_wildcard(alias);
 545       return 1;
 546}
 547
 548
 549
 550static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
 551{
 552    int len;
 553    char *tmp;
 554    len = sprintf (alias, "of:N%sT%s",
 555                    of->name[0] ? of->name : "*",
 556                    of->type[0] ? of->type : "*");
 557
 558    if (of->compatible[0])
 559        sprintf (&alias[len], "%sC%s",
 560                     of->type[0] ? "*" : "",
 561                     of->compatible);
 562
 563    /* Replace all whitespace with underscores */
 564    for (tmp = alias; tmp && *tmp; tmp++)
 565        if (isspace (*tmp))
 566            *tmp = '_';
 567
 568    add_wildcard(alias);
 569    return 1;
 570}
 571
 572static int do_vio_entry(const char *filename, struct vio_device_id *vio,
 573                char *alias)
 574{
 575        char *tmp;
 576
 577        sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*",
 578                        vio->compat[0] ? vio->compat : "*");
 579
 580        /* Replace all whitespace with underscores */
 581        for (tmp = alias; tmp && *tmp; tmp++)
 582                if (isspace (*tmp))
 583                        *tmp = '_';
 584
 585        add_wildcard(alias);
 586        return 1;
 587}
 588
 589#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 590
 591static void do_input(char *alias,
 592                     kernel_ulong_t *arr, unsigned int min, unsigned int max)
 593{
 594        unsigned int i;
 595
 596        for (i = min; i < max; i++)
 597                if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
 598                        sprintf(alias + strlen(alias), "%X,*", i);
 599}
 600
 601/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
 602static int do_input_entry(const char *filename, struct input_device_id *id,
 603                          char *alias)
 604{
 605        sprintf(alias, "input:");
 606
 607        ADD(alias, "b", id->flags & INPUT_DEVICE_ID_MATCH_BUS, id->bustype);
 608        ADD(alias, "v", id->flags & INPUT_DEVICE_ID_MATCH_VENDOR, id->vendor);
 609        ADD(alias, "p", id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT, id->product);
 610        ADD(alias, "e", id->flags & INPUT_DEVICE_ID_MATCH_VERSION, id->version);
 611
 612        sprintf(alias + strlen(alias), "-e*");
 613        if (id->flags & INPUT_DEVICE_ID_MATCH_EVBIT)
 614                do_input(alias, id->evbit, 0, INPUT_DEVICE_ID_EV_MAX);
 615        sprintf(alias + strlen(alias), "k*");
 616        if (id->flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
 617                do_input(alias, id->keybit,
 618                         INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
 619                         INPUT_DEVICE_ID_KEY_MAX);
 620        sprintf(alias + strlen(alias), "r*");
 621        if (id->flags & INPUT_DEVICE_ID_MATCH_RELBIT)
 622                do_input(alias, id->relbit, 0, INPUT_DEVICE_ID_REL_MAX);
 623        sprintf(alias + strlen(alias), "a*");
 624        if (id->flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
 625                do_input(alias, id->absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
 626        sprintf(alias + strlen(alias), "m*");
 627        if (id->flags & INPUT_DEVICE_ID_MATCH_MSCIT)
 628                do_input(alias, id->mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
 629        sprintf(alias + strlen(alias), "l*");
 630        if (id->flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
 631                do_input(alias, id->ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
 632        sprintf(alias + strlen(alias), "s*");
 633        if (id->flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
 634                do_input(alias, id->sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
 635        sprintf(alias + strlen(alias), "f*");
 636        if (id->flags & INPUT_DEVICE_ID_MATCH_FFBIT)
 637                do_input(alias, id->ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
 638        sprintf(alias + strlen(alias), "w*");
 639        if (id->flags & INPUT_DEVICE_ID_MATCH_SWBIT)
 640                do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX);
 641        return 1;
 642}
 643
 644static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa,
 645                char *alias)
 646{
 647        if (eisa->sig[0])
 648                sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", eisa->sig);
 649        else
 650                strcat(alias, "*");
 651        return 1;
 652}
 653
 654/* Looks like: parisc:tNhvNrevNsvN */
 655static int do_parisc_entry(const char *filename, struct parisc_device_id *id,
 656                char *alias)
 657{
 658        id->hw_type = TO_NATIVE(id->hw_type);
 659        id->hversion = TO_NATIVE(id->hversion);
 660        id->hversion_rev = TO_NATIVE(id->hversion_rev);
 661        id->sversion = TO_NATIVE(id->sversion);
 662
 663        strcpy(alias, "parisc:");
 664        ADD(alias, "t", id->hw_type != PA_HWTYPE_ANY_ID, id->hw_type);
 665        ADD(alias, "hv", id->hversion != PA_HVERSION_ANY_ID, id->hversion);
 666        ADD(alias, "rev", id->hversion_rev != PA_HVERSION_REV_ANY_ID, id->hversion_rev);
 667        ADD(alias, "sv", id->sversion != PA_SVERSION_ANY_ID, id->sversion);
 668
 669        add_wildcard(alias);
 670        return 1;
 671}
 672
 673/* Looks like: sdio:cNvNdN. */
 674static int do_sdio_entry(const char *filename,
 675                        struct sdio_device_id *id, char *alias)
 676{
 677        id->class = TO_NATIVE(id->class);
 678        id->vendor = TO_NATIVE(id->vendor);
 679        id->device = TO_NATIVE(id->device);
 680
 681        strcpy(alias, "sdio:");
 682        ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class);
 683        ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor);
 684        ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device);
 685        add_wildcard(alias);
 686        return 1;
 687}
 688
 689/* Looks like: ssb:vNidNrevN. */
 690static int do_ssb_entry(const char *filename,
 691                        struct ssb_device_id *id, char *alias)
 692{
 693        id->vendor = TO_NATIVE(id->vendor);
 694        id->coreid = TO_NATIVE(id->coreid);
 695        id->revision = TO_NATIVE(id->revision);
 696
 697        strcpy(alias, "ssb:");
 698        ADD(alias, "v", id->vendor != SSB_ANY_VENDOR, id->vendor);
 699        ADD(alias, "id", id->coreid != SSB_ANY_ID, id->coreid);
 700        ADD(alias, "rev", id->revision != SSB_ANY_REV, id->revision);
 701        add_wildcard(alias);
 702        return 1;
 703}
 704
 705/* Looks like: virtio:dNvN */
 706static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
 707                           char *alias)
 708{
 709        id->device = TO_NATIVE(id->device);
 710        id->vendor = TO_NATIVE(id->vendor);
 711
 712        strcpy(alias, "virtio:");
 713        ADD(alias, "d", id->device != VIRTIO_DEV_ANY_ID, id->device);
 714        ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor);
 715
 716        add_wildcard(alias);
 717        return 1;
 718}
 719
 720/* Looks like: i2c:S */
 721static int do_i2c_entry(const char *filename, struct i2c_device_id *id,
 722                        char *alias)
 723{
 724        sprintf(alias, I2C_MODULE_PREFIX "%s", id->name);
 725
 726        return 1;
 727}
 728
 729/* Looks like: spi:S */
 730static int do_spi_entry(const char *filename, struct spi_device_id *id,
 731                        char *alias)
 732{
 733        sprintf(alias, SPI_MODULE_PREFIX "%s", id->name);
 734
 735        return 1;
 736}
 737
 738static const struct dmifield {
 739        const char *prefix;
 740        int field;
 741} dmi_fields[] = {
 742        { "bvn", DMI_BIOS_VENDOR },
 743        { "bvr", DMI_BIOS_VERSION },
 744        { "bd",  DMI_BIOS_DATE },
 745        { "svn", DMI_SYS_VENDOR },
 746        { "pn",  DMI_PRODUCT_NAME },
 747        { "pvr", DMI_PRODUCT_VERSION },
 748        { "rvn", DMI_BOARD_VENDOR },
 749        { "rn",  DMI_BOARD_NAME },
 750        { "rvr", DMI_BOARD_VERSION },
 751        { "cvn", DMI_CHASSIS_VENDOR },
 752        { "ct",  DMI_CHASSIS_TYPE },
 753        { "cvr", DMI_CHASSIS_VERSION },
 754        { NULL,  DMI_NONE }
 755};
 756
 757static void dmi_ascii_filter(char *d, const char *s)
 758{
 759        /* Filter out characters we don't want to see in the modalias string */
 760        for (; *s; s++)
 761                if (*s > ' ' && *s < 127 && *s != ':')
 762                        *(d++) = *s;
 763
 764        *d = 0;
 765}
 766
 767
 768static int do_dmi_entry(const char *filename, struct dmi_system_id *id,
 769                        char *alias)
 770{
 771        int i, j;
 772
 773        sprintf(alias, "dmi*");
 774
 775        for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
 776                for (j = 0; j < 4; j++) {
 777                        if (id->matches[j].slot &&
 778                            id->matches[j].slot == dmi_fields[i].field) {
 779                                sprintf(alias + strlen(alias), ":%s*",
 780                                        dmi_fields[i].prefix);
 781                                dmi_ascii_filter(alias + strlen(alias),
 782                                                 id->matches[j].substr);
 783                                strcat(alias, "*");
 784                        }
 785                }
 786        }
 787
 788        strcat(alias, ":");
 789        return 1;
 790}
 791
 792static int do_platform_entry(const char *filename,
 793                             struct platform_device_id *id, char *alias)
 794{
 795        sprintf(alias, PLATFORM_MODULE_PREFIX "%s", id->name);
 796        return 1;
 797}
 798
 799static int do_mdio_entry(const char *filename,
 800                         struct mdio_device_id *id, char *alias)
 801{
 802        int i;
 803
 804        alias += sprintf(alias, MDIO_MODULE_PREFIX);
 805
 806        for (i = 0; i < 32; i++) {
 807                if (!((id->phy_id_mask >> (31-i)) & 1))
 808                        *(alias++) = '?';
 809                else if ((id->phy_id >> (31-i)) & 1)
 810                        *(alias++) = '1';
 811                else
 812                        *(alias++) = '0';
 813        }
 814
 815        /* Terminate the string */
 816        *alias = 0;
 817
 818        return 1;
 819}
 820
 821/* Looks like: zorro:iN. */
 822static int do_zorro_entry(const char *filename, struct zorro_device_id *id,
 823                          char *alias)
 824{
 825        id->id = TO_NATIVE(id->id);
 826        strcpy(alias, "zorro:");
 827        ADD(alias, "i", id->id != ZORRO_WILDCARD, id->id);
 828        return 1;
 829}
 830
 831/* looks like: "pnp:dD" */
 832static int do_isapnp_entry(const char *filename,
 833                           struct isapnp_device_id *id, char *alias)
 834{
 835        sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
 836                'A' + ((id->vendor >> 2) & 0x3f) - 1,
 837                'A' + (((id->vendor & 3) << 3) | ((id->vendor >> 13) & 7)) - 1,
 838                'A' + ((id->vendor >> 8) & 0x1f) - 1,
 839                (id->function >> 4) & 0x0f, id->function & 0x0f,
 840                (id->function >> 12) & 0x0f, (id->function >> 8) & 0x0f);
 841        return 1;
 842}
 843
 844/* Ignore any prefix, eg. some architectures prepend _ */
 845static inline int sym_is(const char *symbol, const char *name)
 846{
 847        const char *match;
 848
 849        match = strstr(symbol, name);
 850        if (!match)
 851                return 0;
 852        return match[strlen(name)] == '\0';
 853}
 854
 855static void do_table(void *symval, unsigned long size,
 856                     unsigned long id_size,
 857                     const char *device_id,
 858                     void *function,
 859                     struct module *mod)
 860{
 861        unsigned int i;
 862        char alias[500];
 863        int (*do_entry)(const char *, void *entry, char *alias) = function;
 864
 865        device_id_check(mod->name, device_id, size, id_size, symval);
 866        /* Leave last one: it's the terminator. */
 867        size -= id_size;
 868
 869        for (i = 0; i < size; i += id_size) {
 870                if (do_entry(mod->name, symval+i, alias)) {
 871                        buf_printf(&mod->dev_table_buf,
 872                                   "MODULE_ALIAS(\"%s\");\n", alias);
 873                }
 874        }
 875}
 876
 877/* Create MODULE_ALIAS() statements.
 878 * At this time, we cannot write the actual output C source yet,
 879 * so we write into the mod->dev_table_buf buffer. */
 880void handle_moddevtable(struct module *mod, struct elf_info *info,
 881                        Elf_Sym *sym, const char *symname)
 882{
 883        void *symval;
 884        char *zeros = NULL;
 885
 886        /* We're looking for a section relative symbol */
 887        if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
 888                return;
 889
 890        /* Handle all-NULL symbols allocated into .bss */
 891        if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
 892                zeros = calloc(1, sym->st_size);
 893                symval = zeros;
 894        } else {
 895                symval = (void *)info->hdr
 896                        + info->sechdrs[get_secindex(info, sym)].sh_offset
 897                        + sym->st_value;
 898        }
 899
 900        if (sym_is(symname, "__mod_pci_device_table"))
 901                do_table(symval, sym->st_size,
 902                         sizeof(struct pci_device_id), "pci",
 903                         do_pci_entry, mod);
 904        else if (sym_is(symname, "__mod_usb_device_table"))
 905                /* special case to handle bcdDevice ranges */
 906                do_usb_table(symval, sym->st_size, mod);
 907        else if (sym_is(symname, "__mod_hid_device_table"))
 908                do_table(symval, sym->st_size,
 909                         sizeof(struct hid_device_id), "hid",
 910                         do_hid_entry, mod);
 911        else if (sym_is(symname, "__mod_ieee1394_device_table"))
 912                do_table(symval, sym->st_size,
 913                         sizeof(struct ieee1394_device_id), "ieee1394",
 914                         do_ieee1394_entry, mod);
 915        else if (sym_is(symname, "__mod_ccw_device_table"))
 916                do_table(symval, sym->st_size,
 917                         sizeof(struct ccw_device_id), "ccw",
 918                         do_ccw_entry, mod);
 919        else if (sym_is(symname, "__mod_ap_device_table"))
 920                do_table(symval, sym->st_size,
 921                         sizeof(struct ap_device_id), "ap",
 922                         do_ap_entry, mod);
 923        else if (sym_is(symname, "__mod_css_device_table"))
 924                do_table(symval, sym->st_size,
 925                         sizeof(struct css_device_id), "css",
 926                         do_css_entry, mod);
 927        else if (sym_is(symname, "__mod_serio_device_table"))
 928                do_table(symval, sym->st_size,
 929                         sizeof(struct serio_device_id), "serio",
 930                         do_serio_entry, mod);
 931        else if (sym_is(symname, "__mod_acpi_device_table"))
 932                do_table(symval, sym->st_size,
 933                         sizeof(struct acpi_device_id), "acpi",
 934                         do_acpi_entry, mod);
 935        else if (sym_is(symname, "__mod_pnp_device_table"))
 936                do_pnp_device_entry(symval, sym->st_size, mod);
 937        else if (sym_is(symname, "__mod_pnp_card_device_table"))
 938                do_pnp_card_entries(symval, sym->st_size, mod);
 939        else if (sym_is(symname, "__mod_pcmcia_device_table"))
 940                do_table(symval, sym->st_size,
 941                         sizeof(struct pcmcia_device_id), "pcmcia",
 942                         do_pcmcia_entry, mod);
 943        else if (sym_is(symname, "__mod_of_device_table"))
 944                do_table(symval, sym->st_size,
 945                         sizeof(struct of_device_id), "of",
 946                         do_of_entry, mod);
 947        else if (sym_is(symname, "__mod_vio_device_table"))
 948                do_table(symval, sym->st_size,
 949                         sizeof(struct vio_device_id), "vio",
 950                         do_vio_entry, mod);
 951        else if (sym_is(symname, "__mod_input_device_table"))
 952                do_table(symval, sym->st_size,
 953                         sizeof(struct input_device_id), "input",
 954                         do_input_entry, mod);
 955        else if (sym_is(symname, "__mod_eisa_device_table"))
 956                do_table(symval, sym->st_size,
 957                         sizeof(struct eisa_device_id), "eisa",
 958                         do_eisa_entry, mod);
 959        else if (sym_is(symname, "__mod_parisc_device_table"))
 960                do_table(symval, sym->st_size,
 961                         sizeof(struct parisc_device_id), "parisc",
 962                         do_parisc_entry, mod);
 963        else if (sym_is(symname, "__mod_sdio_device_table"))
 964                do_table(symval, sym->st_size,
 965                         sizeof(struct sdio_device_id), "sdio",
 966                         do_sdio_entry, mod);
 967        else if (sym_is(symname, "__mod_ssb_device_table"))
 968                do_table(symval, sym->st_size,
 969                         sizeof(struct ssb_device_id), "ssb",
 970                         do_ssb_entry, mod);
 971        else if (sym_is(symname, "__mod_virtio_device_table"))
 972                do_table(symval, sym->st_size,
 973                         sizeof(struct virtio_device_id), "virtio",
 974                         do_virtio_entry, mod);
 975        else if (sym_is(symname, "__mod_i2c_device_table"))
 976                do_table(symval, sym->st_size,
 977                         sizeof(struct i2c_device_id), "i2c",
 978                         do_i2c_entry, mod);
 979        else if (sym_is(symname, "__mod_spi_device_table"))
 980                do_table(symval, sym->st_size,
 981                         sizeof(struct spi_device_id), "spi",
 982                         do_spi_entry, mod);
 983        else if (sym_is(symname, "__mod_dmi_device_table"))
 984                do_table(symval, sym->st_size,
 985                         sizeof(struct dmi_system_id), "dmi",
 986                         do_dmi_entry, mod);
 987        else if (sym_is(symname, "__mod_platform_device_table"))
 988                do_table(symval, sym->st_size,
 989                         sizeof(struct platform_device_id), "platform",
 990                         do_platform_entry, mod);
 991        else if (sym_is(symname, "__mod_mdio_device_table"))
 992                do_table(symval, sym->st_size,
 993                         sizeof(struct mdio_device_id), "mdio",
 994                         do_mdio_entry, mod);
 995        else if (sym_is(symname, "__mod_zorro_device_table"))
 996                do_table(symval, sym->st_size,
 997                         sizeof(struct zorro_device_id), "zorro",
 998                         do_zorro_entry, mod);
 999        else if (sym_is(symname, "__mod_isapnp_device_table"))
1000                do_table(symval, sym->st_size,
1001                        sizeof(struct isapnp_device_id), "isa",
1002                        do_isapnp_entry, mod);
1003        free(zeros);
1004}
1005
1006/* Now add out buffered information to the generated C source */
1007void add_moddevtable(struct buffer *buf, struct module *mod)
1008{
1009        buf_printf(buf, "\n");
1010        buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
1011        free(mod->dev_table_buf.p);
1012}
1013