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                         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), "%u", range_lo);
 122        else if (range_lo > 0 || range_hi < 9)
 123                sprintf(alias + strlen(alias), "[%u-%u]", range_lo, range_hi);
 124        if (bcdDevice_initial_digits < (sizeof(id->bcdDevice_lo) * 2 - 1))
 125                strcat(alias, "*");
 126
 127        ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
 128            id->bDeviceClass);
 129        ADD(alias, "dsc",
 130            id->match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
 131            id->bDeviceSubClass);
 132        ADD(alias, "dp",
 133            id->match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
 134            id->bDeviceProtocol);
 135        ADD(alias, "ic",
 136            id->match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
 137            id->bInterfaceClass);
 138        ADD(alias, "isc",
 139            id->match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
 140            id->bInterfaceSubClass);
 141        ADD(alias, "ip",
 142            id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
 143            id->bInterfaceProtocol);
 144
 145        add_wildcard(alias);
 146        buf_printf(&mod->dev_table_buf,
 147                   "MODULE_ALIAS(\"%s\");\n", alias);
 148}
 149
 150static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod)
 151{
 152        unsigned int devlo, devhi;
 153        unsigned char chi, clo;
 154        int ndigits;
 155
 156        id->match_flags = TO_NATIVE(id->match_flags);
 157        id->idVendor = TO_NATIVE(id->idVendor);
 158        id->idProduct = TO_NATIVE(id->idProduct);
 159
 160        devlo = id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
 161                TO_NATIVE(id->bcdDevice_lo) : 0x0U;
 162        devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
 163                TO_NATIVE(id->bcdDevice_hi) : ~0x0U;
 164
 165        /*
 166         * Some modules (visor) have empty slots as placeholder for
 167         * run-time specification that results in catch-all alias
 168         */
 169        if (!(id->idVendor | id->idProduct | id->bDeviceClass | id->bInterfaceClass))
 170                return;
 171
 172        /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
 173        for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
 174                clo = devlo & 0xf;
 175                chi = devhi & 0xf;
 176                if (chi > 9)    /* it's bcd not hex */
 177                        chi = 9;
 178                devlo >>= 4;
 179                devhi >>= 4;
 180
 181                if (devlo == devhi || !ndigits) {
 182                        do_usb_entry(id, devlo, ndigits, clo, chi, mod);
 183                        break;
 184                }
 185
 186                if (clo > 0)
 187                        do_usb_entry(id, devlo++, ndigits, clo, 9, mod);
 188
 189                if (chi < 9)
 190                        do_usb_entry(id, devhi--, ndigits, 0, chi, mod);
 191        }
 192}
 193
 194static void do_usb_table(void *symval, unsigned long size,
 195                         struct module *mod)
 196{
 197        unsigned int i;
 198        const unsigned long id_size = sizeof(struct usb_device_id);
 199
 200        device_id_check(mod->name, "usb", size, id_size, symval);
 201
 202        /* Leave last one: it's the terminator. */
 203        size -= id_size;
 204
 205        for (i = 0; i < size; i += id_size)
 206                do_usb_entry_multi(symval + i, mod);
 207}
 208
 209/* Looks like: ieee1394:venNmoNspNverN */
 210static int do_ieee1394_entry(const char *filename,
 211                             struct ieee1394_device_id *id, char *alias)
 212{
 213        id->match_flags = TO_NATIVE(id->match_flags);
 214        id->vendor_id = TO_NATIVE(id->vendor_id);
 215        id->model_id = TO_NATIVE(id->model_id);
 216        id->specifier_id = TO_NATIVE(id->specifier_id);
 217        id->version = TO_NATIVE(id->version);
 218
 219        strcpy(alias, "ieee1394:");
 220        ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID,
 221            id->vendor_id);
 222        ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID,
 223            id->model_id);
 224        ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID,
 225            id->specifier_id);
 226        ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION,
 227            id->version);
 228
 229        add_wildcard(alias);
 230        return 1;
 231}
 232
 233/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
 234static int do_pci_entry(const char *filename,
 235                        struct pci_device_id *id, char *alias)
 236{
 237        /* Class field can be divided into these three. */
 238        unsigned char baseclass, subclass, interface,
 239                baseclass_mask, subclass_mask, interface_mask;
 240
 241        id->vendor = TO_NATIVE(id->vendor);
 242        id->device = TO_NATIVE(id->device);
 243        id->subvendor = TO_NATIVE(id->subvendor);
 244        id->subdevice = TO_NATIVE(id->subdevice);
 245        id->class = TO_NATIVE(id->class);
 246        id->class_mask = TO_NATIVE(id->class_mask);
 247
 248        strcpy(alias, "pci:");
 249        ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor);
 250        ADD(alias, "d", id->device != PCI_ANY_ID, id->device);
 251        ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor);
 252        ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice);
 253
 254        baseclass = (id->class) >> 16;
 255        baseclass_mask = (id->class_mask) >> 16;
 256        subclass = (id->class) >> 8;
 257        subclass_mask = (id->class_mask) >> 8;
 258        interface = id->class;
 259        interface_mask = id->class_mask;
 260
 261        if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
 262            || (subclass_mask != 0 && subclass_mask != 0xFF)
 263            || (interface_mask != 0 && interface_mask != 0xFF)) {
 264                warn("Can't handle masks in %s:%04X\n",
 265                     filename, id->class_mask);
 266                return 0;
 267        }
 268
 269        ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
 270        ADD(alias, "sc", subclass_mask == 0xFF, subclass);
 271        ADD(alias, "i", interface_mask == 0xFF, interface);
 272        add_wildcard(alias);
 273        return 1;
 274}
 275
 276/* looks like: "ccw:tNmNdtNdmN" */
 277static int do_ccw_entry(const char *filename,
 278                        struct ccw_device_id *id, char *alias)
 279{
 280        id->match_flags = TO_NATIVE(id->match_flags);
 281        id->cu_type = TO_NATIVE(id->cu_type);
 282        id->cu_model = TO_NATIVE(id->cu_model);
 283        id->dev_type = TO_NATIVE(id->dev_type);
 284        id->dev_model = TO_NATIVE(id->dev_model);
 285
 286        strcpy(alias, "ccw:");
 287        ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
 288            id->cu_type);
 289        ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
 290            id->cu_model);
 291        ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
 292            id->dev_type);
 293        ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
 294            id->dev_model);
 295        add_wildcard(alias);
 296        return 1;
 297}
 298
 299/* looks like: "ap:tN" */
 300static int do_ap_entry(const char *filename,
 301                       struct ap_device_id *id, char *alias)
 302{
 303        sprintf(alias, "ap:t%02X*", id->dev_type);
 304        return 1;
 305}
 306
 307/* looks like: "css:tN" */
 308static int do_css_entry(const char *filename,
 309                        struct css_device_id *id, char *alias)
 310{
 311        sprintf(alias, "css:t%01X", id->type);
 312        return 1;
 313}
 314
 315/* Looks like: "serio:tyNprNidNexN" */
 316static int do_serio_entry(const char *filename,
 317                          struct serio_device_id *id, char *alias)
 318{
 319        id->type = TO_NATIVE(id->type);
 320        id->proto = TO_NATIVE(id->proto);
 321        id->id = TO_NATIVE(id->id);
 322        id->extra = TO_NATIVE(id->extra);
 323
 324        strcpy(alias, "serio:");
 325        ADD(alias, "ty", id->type != SERIO_ANY, id->type);
 326        ADD(alias, "pr", id->proto != SERIO_ANY, id->proto);
 327        ADD(alias, "id", id->id != SERIO_ANY, id->id);
 328        ADD(alias, "ex", id->extra != SERIO_ANY, id->extra);
 329
 330        add_wildcard(alias);
 331        return 1;
 332}
 333
 334/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
 335static int do_acpi_entry(const char *filename,
 336                        struct acpi_device_id *id, char *alias)
 337{
 338        sprintf(alias, "acpi*:%s:*", id->id);
 339        return 1;
 340}
 341
 342/* looks like: "pnp:dD" */
 343static void do_pnp_device_entry(void *symval, unsigned long size,
 344                                struct module *mod)
 345{
 346        const unsigned long id_size = sizeof(struct pnp_device_id);
 347        const unsigned int count = (size / id_size)-1;
 348        const struct pnp_device_id *devs = symval;
 349        unsigned int i;
 350
 351        device_id_check(mod->name, "pnp", size, id_size, symval);
 352
 353        for (i = 0; i < count; i++) {
 354                const char *id = (char *)devs[i].id;
 355
 356                buf_printf(&mod->dev_table_buf,
 357                           "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 358                buf_printf(&mod->dev_table_buf,
 359                           "MODULE_ALIAS(\"acpi*:%s:*\");\n", id);
 360        }
 361}
 362
 363/* looks like: "pnp:dD" for every device of the card */
 364static void do_pnp_card_entries(void *symval, unsigned long size,
 365                                struct module *mod)
 366{
 367        const unsigned long id_size = sizeof(struct pnp_card_device_id);
 368        const unsigned int count = (size / id_size)-1;
 369        const struct pnp_card_device_id *cards = symval;
 370        unsigned int i;
 371
 372        device_id_check(mod->name, "pnp", size, id_size, symval);
 373
 374        for (i = 0; i < count; i++) {
 375                unsigned int j;
 376                const struct pnp_card_device_id *card = &cards[i];
 377
 378                for (j = 0; j < PNP_MAX_DEVICES; j++) {
 379                        const char *id = (char *)card->devs[j].id;
 380                        int i2, j2;
 381                        int dup = 0;
 382
 383                        if (!id[0])
 384                                break;
 385
 386                        /* find duplicate, already added value */
 387                        for (i2 = 0; i2 < i && !dup; i2++) {
 388                                const struct pnp_card_device_id *card2 = &cards[i2];
 389
 390                                for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
 391                                        const char *id2 = (char *)card2->devs[j2].id;
 392
 393                                        if (!id2[0])
 394                                                break;
 395
 396                                        if (!strcmp(id, id2)) {
 397                                                dup = 1;
 398                                                break;
 399                                        }
 400                                }
 401                        }
 402
 403                        /* add an individual alias for every device entry */
 404                        if (!dup) {
 405                                buf_printf(&mod->dev_table_buf,
 406                                           "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 407                                buf_printf(&mod->dev_table_buf,
 408                                           "MODULE_ALIAS(\"acpi*:%s:*\");\n", id);
 409                        }
 410                }
 411        }
 412}
 413
 414/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
 415static int do_pcmcia_entry(const char *filename,
 416                           struct pcmcia_device_id *id, char *alias)
 417{
 418        unsigned int i;
 419
 420        id->match_flags = TO_NATIVE(id->match_flags);
 421        id->manf_id = TO_NATIVE(id->manf_id);
 422        id->card_id = TO_NATIVE(id->card_id);
 423        id->func_id = TO_NATIVE(id->func_id);
 424        id->function = TO_NATIVE(id->function);
 425        id->device_no = TO_NATIVE(id->device_no);
 426
 427        for (i=0; i<4; i++) {
 428                id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]);
 429       }
 430
 431       strcpy(alias, "pcmcia:");
 432       ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
 433           id->manf_id);
 434       ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
 435           id->card_id);
 436       ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
 437           id->func_id);
 438       ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
 439           id->function);
 440       ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
 441           id->device_no);
 442       ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]);
 443       ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]);
 444       ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]);
 445       ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]);
 446
 447        add_wildcard(alias);
 448       return 1;
 449}
 450
 451
 452
 453static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
 454{
 455    int len;
 456    char *tmp;
 457    len = sprintf (alias, "of:N%sT%s",
 458                    of->name[0] ? of->name : "*",
 459                    of->type[0] ? of->type : "*");
 460
 461    if (of->compatible[0])
 462        sprintf (&alias[len], "%sC%s",
 463                     of->type[0] ? "*" : "",
 464                     of->compatible);
 465
 466    /* Replace all whitespace with underscores */
 467    for (tmp = alias; tmp && *tmp; tmp++)
 468        if (isspace (*tmp))
 469            *tmp = '_';
 470
 471    add_wildcard(alias);
 472    return 1;
 473}
 474
 475static int do_vio_entry(const char *filename, struct vio_device_id *vio,
 476                char *alias)
 477{
 478        char *tmp;
 479
 480        sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*",
 481                        vio->compat[0] ? vio->compat : "*");
 482
 483        /* Replace all whitespace with underscores */
 484        for (tmp = alias; tmp && *tmp; tmp++)
 485                if (isspace (*tmp))
 486                        *tmp = '_';
 487
 488        add_wildcard(alias);
 489        return 1;
 490}
 491
 492#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 493
 494static void do_input(char *alias,
 495                     kernel_ulong_t *arr, unsigned int min, unsigned int max)
 496{
 497        unsigned int i;
 498
 499        for (i = min; i < max; i++)
 500                if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
 501                        sprintf(alias + strlen(alias), "%X,*", i);
 502}
 503
 504/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
 505static int do_input_entry(const char *filename, struct input_device_id *id,
 506                          char *alias)
 507{
 508        sprintf(alias, "input:");
 509
 510        ADD(alias, "b", id->flags & INPUT_DEVICE_ID_MATCH_BUS, id->bustype);
 511        ADD(alias, "v", id->flags & INPUT_DEVICE_ID_MATCH_VENDOR, id->vendor);
 512        ADD(alias, "p", id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT, id->product);
 513        ADD(alias, "e", id->flags & INPUT_DEVICE_ID_MATCH_VERSION, id->version);
 514
 515        sprintf(alias + strlen(alias), "-e*");
 516        if (id->flags & INPUT_DEVICE_ID_MATCH_EVBIT)
 517                do_input(alias, id->evbit, 0, INPUT_DEVICE_ID_EV_MAX);
 518        sprintf(alias + strlen(alias), "k*");
 519        if (id->flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
 520                do_input(alias, id->keybit,
 521                         INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
 522                         INPUT_DEVICE_ID_KEY_MAX);
 523        sprintf(alias + strlen(alias), "r*");
 524        if (id->flags & INPUT_DEVICE_ID_MATCH_RELBIT)
 525                do_input(alias, id->relbit, 0, INPUT_DEVICE_ID_REL_MAX);
 526        sprintf(alias + strlen(alias), "a*");
 527        if (id->flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
 528                do_input(alias, id->absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
 529        sprintf(alias + strlen(alias), "m*");
 530        if (id->flags & INPUT_DEVICE_ID_MATCH_MSCIT)
 531                do_input(alias, id->mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
 532        sprintf(alias + strlen(alias), "l*");
 533        if (id->flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
 534                do_input(alias, id->ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
 535        sprintf(alias + strlen(alias), "s*");
 536        if (id->flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
 537                do_input(alias, id->sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
 538        sprintf(alias + strlen(alias), "f*");
 539        if (id->flags & INPUT_DEVICE_ID_MATCH_FFBIT)
 540                do_input(alias, id->ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
 541        sprintf(alias + strlen(alias), "w*");
 542        if (id->flags & INPUT_DEVICE_ID_MATCH_SWBIT)
 543                do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX);
 544        return 1;
 545}
 546
 547static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa,
 548                char *alias)
 549{
 550        if (eisa->sig[0])
 551                sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", eisa->sig);
 552        else
 553                strcat(alias, "*");
 554        return 1;
 555}
 556
 557/* Looks like: parisc:tNhvNrevNsvN */
 558static int do_parisc_entry(const char *filename, struct parisc_device_id *id,
 559                char *alias)
 560{
 561        id->hw_type = TO_NATIVE(id->hw_type);
 562        id->hversion = TO_NATIVE(id->hversion);
 563        id->hversion_rev = TO_NATIVE(id->hversion_rev);
 564        id->sversion = TO_NATIVE(id->sversion);
 565
 566        strcpy(alias, "parisc:");
 567        ADD(alias, "t", id->hw_type != PA_HWTYPE_ANY_ID, id->hw_type);
 568        ADD(alias, "hv", id->hversion != PA_HVERSION_ANY_ID, id->hversion);
 569        ADD(alias, "rev", id->hversion_rev != PA_HVERSION_REV_ANY_ID, id->hversion_rev);
 570        ADD(alias, "sv", id->sversion != PA_SVERSION_ANY_ID, id->sversion);
 571
 572        add_wildcard(alias);
 573        return 1;
 574}
 575
 576/* Looks like: sdio:cNvNdN. */
 577static int do_sdio_entry(const char *filename,
 578                        struct sdio_device_id *id, char *alias)
 579{
 580        id->class = TO_NATIVE(id->class);
 581        id->vendor = TO_NATIVE(id->vendor);
 582        id->device = TO_NATIVE(id->device);
 583
 584        strcpy(alias, "sdio:");
 585        ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class);
 586        ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor);
 587        ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device);
 588        add_wildcard(alias);
 589        return 1;
 590}
 591
 592/* Looks like: ssb:vNidNrevN. */
 593static int do_ssb_entry(const char *filename,
 594                        struct ssb_device_id *id, char *alias)
 595{
 596        id->vendor = TO_NATIVE(id->vendor);
 597        id->coreid = TO_NATIVE(id->coreid);
 598        id->revision = TO_NATIVE(id->revision);
 599
 600        strcpy(alias, "ssb:");
 601        ADD(alias, "v", id->vendor != SSB_ANY_VENDOR, id->vendor);
 602        ADD(alias, "id", id->coreid != SSB_ANY_ID, id->coreid);
 603        ADD(alias, "rev", id->revision != SSB_ANY_REV, id->revision);
 604        add_wildcard(alias);
 605        return 1;
 606}
 607
 608/* Looks like: virtio:dNvN */
 609static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
 610                           char *alias)
 611{
 612        id->device = TO_NATIVE(id->device);
 613        id->vendor = TO_NATIVE(id->vendor);
 614
 615        strcpy(alias, "virtio:");
 616        ADD(alias, "d", 1, id->device);
 617        ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor);
 618
 619        add_wildcard(alias);
 620        return 1;
 621}
 622
 623/* Looks like: i2c:S */
 624static int do_i2c_entry(const char *filename, struct i2c_device_id *id,
 625                        char *alias)
 626{
 627        sprintf(alias, I2C_MODULE_PREFIX "%s", id->name);
 628
 629        return 1;
 630}
 631
 632/* Ignore any prefix, eg. some architectures prepend _ */
 633static inline int sym_is(const char *symbol, const char *name)
 634{
 635        const char *match;
 636
 637        match = strstr(symbol, name);
 638        if (!match)
 639                return 0;
 640        return match[strlen(symbol)] == '\0';
 641}
 642
 643static void do_table(void *symval, unsigned long size,
 644                     unsigned long id_size,
 645                     const char *device_id,
 646                     void *function,
 647                     struct module *mod)
 648{
 649        unsigned int i;
 650        char alias[500];
 651        int (*do_entry)(const char *, void *entry, char *alias) = function;
 652
 653        device_id_check(mod->name, device_id, size, id_size, symval);
 654        /* Leave last one: it's the terminator. */
 655        size -= id_size;
 656
 657        for (i = 0; i < size; i += id_size) {
 658                if (do_entry(mod->name, symval+i, alias)) {
 659                        buf_printf(&mod->dev_table_buf,
 660                                   "MODULE_ALIAS(\"%s\");\n", alias);
 661                }
 662        }
 663}
 664
 665/* Create MODULE_ALIAS() statements.
 666 * At this time, we cannot write the actual output C source yet,
 667 * so we write into the mod->dev_table_buf buffer. */
 668void handle_moddevtable(struct module *mod, struct elf_info *info,
 669                        Elf_Sym *sym, const char *symname)
 670{
 671        void *symval;
 672        char *zeros = NULL;
 673
 674        /* We're looking for a section relative symbol */
 675        if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum)
 676                return;
 677
 678        /* Handle all-NULL symbols allocated into .bss */
 679        if (info->sechdrs[sym->st_shndx].sh_type & SHT_NOBITS) {
 680                zeros = calloc(1, sym->st_size);
 681                symval = zeros;
 682        } else {
 683                symval = (void *)info->hdr
 684                        + info->sechdrs[sym->st_shndx].sh_offset
 685                        + sym->st_value;
 686        }
 687
 688        if (sym_is(symname, "__mod_pci_device_table"))
 689                do_table(symval, sym->st_size,
 690                         sizeof(struct pci_device_id), "pci",
 691                         do_pci_entry, mod);
 692        else if (sym_is(symname, "__mod_usb_device_table"))
 693                /* special case to handle bcdDevice ranges */
 694                do_usb_table(symval, sym->st_size, mod);
 695        else if (sym_is(symname, "__mod_ieee1394_device_table"))
 696                do_table(symval, sym->st_size,
 697                         sizeof(struct ieee1394_device_id), "ieee1394",
 698                         do_ieee1394_entry, mod);
 699        else if (sym_is(symname, "__mod_ccw_device_table"))
 700                do_table(symval, sym->st_size,
 701                         sizeof(struct ccw_device_id), "ccw",
 702                         do_ccw_entry, mod);
 703        else if (sym_is(symname, "__mod_ap_device_table"))
 704                do_table(symval, sym->st_size,
 705                         sizeof(struct ap_device_id), "ap",
 706                         do_ap_entry, mod);
 707        else if (sym_is(symname, "__mod_css_device_table"))
 708                do_table(symval, sym->st_size,
 709                         sizeof(struct css_device_id), "css",
 710                         do_css_entry, mod);
 711        else if (sym_is(symname, "__mod_serio_device_table"))
 712                do_table(symval, sym->st_size,
 713                         sizeof(struct serio_device_id), "serio",
 714                         do_serio_entry, mod);
 715        else if (sym_is(symname, "__mod_acpi_device_table"))
 716                do_table(symval, sym->st_size,
 717                         sizeof(struct acpi_device_id), "acpi",
 718                         do_acpi_entry, mod);
 719        else if (sym_is(symname, "__mod_pnp_device_table"))
 720                do_pnp_device_entry(symval, sym->st_size, mod);
 721        else if (sym_is(symname, "__mod_pnp_card_device_table"))
 722                do_pnp_card_entries(symval, sym->st_size, mod);
 723        else if (sym_is(symname, "__mod_pcmcia_device_table"))
 724                do_table(symval, sym->st_size,
 725                         sizeof(struct pcmcia_device_id), "pcmcia",
 726                         do_pcmcia_entry, mod);
 727        else if (sym_is(symname, "__mod_of_device_table"))
 728                do_table(symval, sym->st_size,
 729                         sizeof(struct of_device_id), "of",
 730                         do_of_entry, mod);
 731        else if (sym_is(symname, "__mod_vio_device_table"))
 732                do_table(symval, sym->st_size,
 733                         sizeof(struct vio_device_id), "vio",
 734                         do_vio_entry, mod);
 735        else if (sym_is(symname, "__mod_input_device_table"))
 736                do_table(symval, sym->st_size,
 737                         sizeof(struct input_device_id), "input",
 738                         do_input_entry, mod);
 739        else if (sym_is(symname, "__mod_eisa_device_table"))
 740                do_table(symval, sym->st_size,
 741                         sizeof(struct eisa_device_id), "eisa",
 742                         do_eisa_entry, mod);
 743        else if (sym_is(symname, "__mod_parisc_device_table"))
 744                do_table(symval, sym->st_size,
 745                         sizeof(struct parisc_device_id), "parisc",
 746                         do_parisc_entry, mod);
 747        else if (sym_is(symname, "__mod_sdio_device_table"))
 748                do_table(symval, sym->st_size,
 749                         sizeof(struct sdio_device_id), "sdio",
 750                         do_sdio_entry, mod);
 751        else if (sym_is(symname, "__mod_ssb_device_table"))
 752                do_table(symval, sym->st_size,
 753                         sizeof(struct ssb_device_id), "ssb",
 754                         do_ssb_entry, mod);
 755        else if (sym_is(symname, "__mod_virtio_device_table"))
 756                do_table(symval, sym->st_size,
 757                         sizeof(struct virtio_device_id), "virtio",
 758                         do_virtio_entry, mod);
 759        else if (sym_is(symname, "__mod_i2c_device_table"))
 760                do_table(symval, sym->st_size,
 761                         sizeof(struct i2c_device_id), "i2c",
 762                         do_i2c_entry, mod);
 763        free(zeros);
 764}
 765
 766/* Now add out buffered information to the generated C source */
 767void add_moddevtable(struct buffer *buf, struct module *mod)
 768{
 769        buf_printf(buf, "\n");
 770        buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
 771        free(mod->dev_table_buf.p);
 772}
 773