scripts/mod/file2alias.c

   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
  18 typedef Elf32_Addr      kernel_ulong_t;
  19 #define BITS_PER_LONG 32
  20 #else
  21 typedef 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
  32 typedef uint32_t        __u32;
  33 typedef uint16_t        __u16;
  34 typedef 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)                              \
  42 do {                                                            \
  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 */
  55 static inline void add_wildcard(char *str)
  56 {
  57         int len = strlen(str);
  58
  59         if (str[len - 1] != '*')
  60                 strcat(str + len, "*");
  61 }
  62
  63 unsigned 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  **/
  71 static 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" */
 104 static 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-- */
 165 static 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
 202 static 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
 263 static 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 */
 279 static 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 */
 294 static 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. */
 318 static 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" */
 361 static 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" */
 384 static 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" */
 392 static 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" */
 400 static 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" */
 419 static 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" */
 427 static 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 */
 454 static 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. */
 512 static 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
 550 static 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
 572 static 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
 591 static 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. */
 602 static 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
 644 static 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 */
 655 static 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. */
 674 static 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. */
 690 static 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 */
 706 static 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 */
 721 static 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 */
 730 static 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
 738 static 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
 757 static 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
 768 static 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
 792 static 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
 799 /* Ignore any prefix, eg. some architectures prepend _ */
 800 static inline int sym_is(const char *symbol, const char *name)
 801 {
 802         const char *match;
 803
 804         match = strstr(symbol, name);
 805         if (!match)
 806                 return 0;
 807         return match[strlen(symbol)] == '\0';
 808 }
 809
 810 static void do_table(void *symval, unsigned long size,
 811                      unsigned long id_size,
 812                      const char *device_id,
 813                      void *function,
 814                      struct module *mod)
 815 {
 816         unsigned int i;
 817         char alias[500];
 818         int (*do_entry)(const char *, void *entry, char *alias) = function;
 819
 820         device_id_check(mod->name, device_id, size, id_size, symval);
 821         /* Leave last one: it's the terminator. */
 822         size -= id_size;
 823
 824         for (i = 0; i < size; i += id_size) {
 825                 if (do_entry(mod->name, symval+i, alias)) {
 826                         buf_printf(&mod->dev_table_buf,
 827                                    "MODULE_ALIAS(\"%s\");\n", alias);
 828                 }
 829         }
 830 }
 831
 832 /* Create MODULE_ALIAS() statements.
 833  * At this time, we cannot write the actual output C source yet,
 834  * so we write into the mod->dev_table_buf buffer. */
 835 void handle_moddevtable(struct module *mod, struct elf_info *info,
 836                         Elf_Sym *sym, const char *symname)
 837 {
 838         void *symval;
 839         char *zeros = NULL;
 840
 841         /* We're looking for a section relative symbol */
 842         if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum)
 843                 return;
 844
 845         /* Handle all-NULL symbols allocated into .bss */
 846         if (info->sechdrs[sym->st_shndx].sh_type & SHT_NOBITS) {
 847                 zeros = calloc(1, sym->st_size);
 848                 symval = zeros;
 849         } else {
 850                 symval = (void *)info->hdr
 851                         + info->sechdrs[sym->st_shndx].sh_offset
 852                         + sym->st_value;
 853         }
 854
 855         if (sym_is(symname, "__mod_pci_device_table"))
 856                 do_table(symval, sym->st_size,
 857                          sizeof(struct pci_device_id), "pci",
 858                          do_pci_entry, mod);
 859         else if (sym_is(symname, "__mod_usb_device_table"))
 860                 /* special case to handle bcdDevice ranges */
 861                 do_usb_table(symval, sym->st_size, mod);
 862         else if (sym_is(symname, "__mod_hid_device_table"))
 863                 do_table(symval, sym->st_size,
 864                          sizeof(struct hid_device_id), "hid",
 865                          do_hid_entry, mod);
 866         else if (sym_is(symname, "__mod_ieee1394_device_table"))
 867                 do_table(symval, sym->st_size,
 868                          sizeof(struct ieee1394_device_id), "ieee1394",
 869                          do_ieee1394_entry, mod);
 870         else if (sym_is(symname, "__mod_ccw_device_table"))
 871                 do_table(symval, sym->st_size,
 872                          sizeof(struct ccw_device_id), "ccw",
 873                          do_ccw_entry, mod);
 874         else if (sym_is(symname, "__mod_ap_device_table"))
 875                 do_table(symval, sym->st_size,
 876                          sizeof(struct ap_device_id), "ap",
 877                          do_ap_entry, mod);
 878         else if (sym_is(symname, "__mod_css_device_table"))
 879                 do_table(symval, sym->st_size,
 880                          sizeof(struct css_device_id), "css",
 881                          do_css_entry, mod);
 882         else if (sym_is(symname, "__mod_serio_device_table"))
 883                 do_table(symval, sym->st_size,
 884                          sizeof(struct serio_device_id), "serio",
 885                          do_serio_entry, mod);
 886         else if (sym_is(symname, "__mod_acpi_device_table"))
 887                 do_table(symval, sym->st_size,
 888                          sizeof(struct acpi_device_id), "acpi",
 889                          do_acpi_entry, mod);
 890         else if (sym_is(symname, "__mod_pnp_device_table"))
 891                 do_pnp_device_entry(symval, sym->st_size, mod);
 892         else if (sym_is(symname, "__mod_pnp_card_device_table"))
 893                 do_pnp_card_entries(symval, sym->st_size, mod);
 894         else if (sym_is(symname, "__mod_pcmcia_device_table"))
 895                 do_table(symval, sym->st_size,
 896                          sizeof(struct pcmcia_device_id), "pcmcia",
 897                          do_pcmcia_entry, mod);
 898         else if (sym_is(symname, "__mod_of_device_table"))
 899                 do_table(symval, sym->st_size,
 900                          sizeof(struct of_device_id), "of",
 901                          do_of_entry, mod);
 902         else if (sym_is(symname, "__mod_vio_device_table"))
 903                 do_table(symval, sym->st_size,
 904                          sizeof(struct vio_device_id), "vio",
 905                          do_vio_entry, mod);
 906         else if (sym_is(symname, "__mod_input_device_table"))
 907                 do_table(symval, sym->st_size,
 908                          sizeof(struct input_device_id), "input",
 909                          do_input_entry, mod);
 910         else if (sym_is(symname, "__mod_eisa_device_table"))
 911                 do_table(symval, sym->st_size,
 912                          sizeof(struct eisa_device_id), "eisa",
 913                          do_eisa_entry, mod);
 914         else if (sym_is(symname, "__mod_parisc_device_table"))
 915                 do_table(symval, sym->st_size,
 916                          sizeof(struct parisc_device_id), "parisc",
 917                          do_parisc_entry, mod);
 918         else if (sym_is(symname, "__mod_sdio_device_table"))
 919                 do_table(symval, sym->st_size,
 920                          sizeof(struct sdio_device_id), "sdio",
 921                          do_sdio_entry, mod);
 922         else if (sym_is(symname, "__mod_ssb_device_table"))
 923                 do_table(symval, sym->st_size,
 924                          sizeof(struct ssb_device_id), "ssb",
 925                          do_ssb_entry, mod);
 926         else if (sym_is(symname, "__mod_virtio_device_table"))
 927                 do_table(symval, sym->st_size,
 928                          sizeof(struct virtio_device_id), "virtio",
 929                          do_virtio_entry, mod);
 930         else if (sym_is(symname, "__mod_i2c_device_table"))
 931                 do_table(symval, sym->st_size,
 932                          sizeof(struct i2c_device_id), "i2c",
 933                          do_i2c_entry, mod);
 934         else if (sym_is(symname, "__mod_spi_device_table"))
 935                 do_table(symval, sym->st_size,
 936                          sizeof(struct spi_device_id), "spi",
 937                          do_spi_entry, mod);
 938         else if (sym_is(symname, "__mod_dmi_device_table"))
 939                 do_table(symval, sym->st_size,
 940                          sizeof(struct dmi_system_id), "dmi",
 941                          do_dmi_entry, mod);
 942         else if (sym_is(symname, "__mod_platform_device_table"))
 943                 do_table(symval, sym->st_size,
 944                          sizeof(struct platform_device_id), "platform",
 945                          do_platform_entry, mod);
 946         free(zeros);
 947 }
 948
 949 /* Now add out buffered information to the generated C source */
 950 void add_moddevtable(struct buffer *buf, struct module *mod)
 951 {
 952         buf_printf(buf, "\n");
 953         buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
 954         free(mod->dev_table_buf.p);
 955 }