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                          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
 150 static 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
 194 static 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: hid:bNvNpN */
 210 static int do_hid_entry(const char *filename,
 211                              struct hid_device_id *id, char *alias)
 212 {
 213         id->vendor = TO_NATIVE(id->vendor);
 214         id->product = TO_NATIVE(id->product);
 215
 216         sprintf(alias, "hid:b%04X", id->bus);
 217         ADD(alias, "v", id->vendor != HID_ANY_ID, id->vendor);
 218         ADD(alias, "p", id->product != HID_ANY_ID, id->product);
 219
 220         return 1;
 221 }
 222
 223 /* Looks like: ieee1394:venNmoNspNverN */
 224 static int do_ieee1394_entry(const char *filename,
 225                              struct ieee1394_device_id *id, char *alias)
 226 {
 227         id->match_flags = TO_NATIVE(id->match_flags);
 228         id->vendor_id = TO_NATIVE(id->vendor_id);
 229         id->model_id = TO_NATIVE(id->model_id);
 230         id->specifier_id = TO_NATIVE(id->specifier_id);
 231         id->version = TO_NATIVE(id->version);
 232
 233         strcpy(alias, "ieee1394:");
 234         ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID,
 235             id->vendor_id);
 236         ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID,
 237             id->model_id);
 238         ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID,
 239             id->specifier_id);
 240         ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION,
 241             id->version);
 242
 243         add_wildcard(alias);
 244         return 1;
 245 }
 246
 247 /* Looks like: pci:vNdNsvNsdNbcNscNiN. */
 248 static int do_pci_entry(const char *filename,
 249                         struct pci_device_id *id, char *alias)
 250 {
 251         /* Class field can be divided into these three. */
 252         unsigned char baseclass, subclass, interface,
 253                 baseclass_mask, subclass_mask, interface_mask;
 254
 255         id->vendor = TO_NATIVE(id->vendor);
 256         id->device = TO_NATIVE(id->device);
 257         id->subvendor = TO_NATIVE(id->subvendor);
 258         id->subdevice = TO_NATIVE(id->subdevice);
 259         id->class = TO_NATIVE(id->class);
 260         id->class_mask = TO_NATIVE(id->class_mask);
 261
 262         strcpy(alias, "pci:");
 263         ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor);
 264         ADD(alias, "d", id->device != PCI_ANY_ID, id->device);
 265         ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor);
 266         ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice);
 267
 268         baseclass = (id->class) >> 16;
 269         baseclass_mask = (id->class_mask) >> 16;
 270         subclass = (id->class) >> 8;
 271         subclass_mask = (id->class_mask) >> 8;
 272         interface = id->class;
 273         interface_mask = id->class_mask;
 274
 275         if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
 276             || (subclass_mask != 0 && subclass_mask != 0xFF)
 277             || (interface_mask != 0 && interface_mask != 0xFF)) {
 278                 warn("Can't handle masks in %s:%04X\n",
 279                      filename, id->class_mask);
 280                 return 0;
 281         }
 282
 283         ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
 284         ADD(alias, "sc", subclass_mask == 0xFF, subclass);
 285         ADD(alias, "i", interface_mask == 0xFF, interface);
 286         add_wildcard(alias);
 287         return 1;
 288 }
 289
 290 /* looks like: "ccw:tNmNdtNdmN" */
 291 static int do_ccw_entry(const char *filename,
 292                         struct ccw_device_id *id, char *alias)
 293 {
 294         id->match_flags = TO_NATIVE(id->match_flags);
 295         id->cu_type = TO_NATIVE(id->cu_type);
 296         id->cu_model = TO_NATIVE(id->cu_model);
 297         id->dev_type = TO_NATIVE(id->dev_type);
 298         id->dev_model = TO_NATIVE(id->dev_model);
 299
 300         strcpy(alias, "ccw:");
 301         ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
 302             id->cu_type);
 303         ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
 304             id->cu_model);
 305         ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
 306             id->dev_type);
 307         ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
 308             id->dev_model);
 309         add_wildcard(alias);
 310         return 1;
 311 }
 312
 313 /* looks like: "ap:tN" */
 314 static int do_ap_entry(const char *filename,
 315                        struct ap_device_id *id, char *alias)
 316 {
 317         sprintf(alias, "ap:t%02X*", id->dev_type);
 318         return 1;
 319 }
 320
 321 /* looks like: "css:tN" */
 322 static int do_css_entry(const char *filename,
 323                         struct css_device_id *id, char *alias)
 324 {
 325         sprintf(alias, "css:t%01X", id->type);
 326         return 1;
 327 }
 328
 329 /* Looks like: "serio:tyNprNidNexN" */
 330 static int do_serio_entry(const char *filename,
 331                           struct serio_device_id *id, char *alias)
 332 {
 333         id->type = TO_NATIVE(id->type);
 334         id->proto = TO_NATIVE(id->proto);
 335         id->id = TO_NATIVE(id->id);
 336         id->extra = TO_NATIVE(id->extra);
 337
 338         strcpy(alias, "serio:");
 339         ADD(alias, "ty", id->type != SERIO_ANY, id->type);
 340         ADD(alias, "pr", id->proto != SERIO_ANY, id->proto);
 341         ADD(alias, "id", id->id != SERIO_ANY, id->id);
 342         ADD(alias, "ex", id->extra != SERIO_ANY, id->extra);
 343
 344         add_wildcard(alias);
 345         return 1;
 346 }
 347
 348 /* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
 349 static int do_acpi_entry(const char *filename,
 350                         struct acpi_device_id *id, char *alias)
 351 {
 352         sprintf(alias, "acpi*:%s:*", id->id);
 353         return 1;
 354 }
 355
 356 /* looks like: "pnp:dD" */
 357 static void do_pnp_device_entry(void *symval, unsigned long size,
 358                                 struct module *mod)
 359 {
 360         const unsigned long id_size = sizeof(struct pnp_device_id);
 361         const unsigned int count = (size / id_size)-1;
 362         const struct pnp_device_id *devs = symval;
 363         unsigned int i;
 364
 365         device_id_check(mod->name, "pnp", size, id_size, symval);
 366
 367         for (i = 0; i < count; i++) {
 368                 const char *id = (char *)devs[i].id;
 369
 370                 buf_printf(&mod->dev_table_buf,
 371                            "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 372                 buf_printf(&mod->dev_table_buf,
 373                            "MODULE_ALIAS(\"acpi*:%s:*\");\n", id);
 374         }
 375 }
 376
 377 /* looks like: "pnp:dD" for every device of the card */
 378 static void do_pnp_card_entries(void *symval, unsigned long size,
 379                                 struct module *mod)
 380 {
 381         const unsigned long id_size = sizeof(struct pnp_card_device_id);
 382         const unsigned int count = (size / id_size)-1;
 383         const struct pnp_card_device_id *cards = symval;
 384         unsigned int i;
 385
 386         device_id_check(mod->name, "pnp", size, id_size, symval);
 387
 388         for (i = 0; i < count; i++) {
 389                 unsigned int j;
 390                 const struct pnp_card_device_id *card = &cards[i];
 391
 392                 for (j = 0; j < PNP_MAX_DEVICES; j++) {
 393                         const char *id = (char *)card->devs[j].id;
 394                         int i2, j2;
 395                         int dup = 0;
 396
 397                         if (!id[0])
 398                                 break;
 399
 400                         /* find duplicate, already added value */
 401                         for (i2 = 0; i2 < i && !dup; i2++) {
 402                                 const struct pnp_card_device_id *card2 = &cards[i2];
 403
 404                                 for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
 405                                         const char *id2 = (char *)card2->devs[j2].id;
 406
 407                                         if (!id2[0])
 408                                                 break;
 409
 410                                         if (!strcmp(id, id2)) {
 411                                                 dup = 1;
 412                                                 break;
 413                                         }
 414                                 }
 415                         }
 416
 417                         /* add an individual alias for every device entry */
 418                         if (!dup) {
 419                                 buf_printf(&mod->dev_table_buf,
 420                                            "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 421                                 buf_printf(&mod->dev_table_buf,
 422                                            "MODULE_ALIAS(\"acpi*:%s:*\");\n", id);
 423                         }
 424                 }
 425         }
 426 }
 427
 428 /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
 429 static int do_pcmcia_entry(const char *filename,
 430                            struct pcmcia_device_id *id, char *alias)
 431 {
 432         unsigned int i;
 433
 434         id->match_flags = TO_NATIVE(id->match_flags);
 435         id->manf_id = TO_NATIVE(id->manf_id);
 436         id->card_id = TO_NATIVE(id->card_id);
 437         id->func_id = TO_NATIVE(id->func_id);
 438         id->function = TO_NATIVE(id->function);
 439         id->device_no = TO_NATIVE(id->device_no);
 440
 441         for (i=0; i<4; i++) {
 442                 id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]);
 443        }
 444
 445        strcpy(alias, "pcmcia:");
 446        ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
 447            id->manf_id);
 448        ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
 449            id->card_id);
 450        ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
 451            id->func_id);
 452        ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
 453            id->function);
 454        ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
 455            id->device_no);
 456        ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]);
 457        ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]);
 458        ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]);
 459        ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]);
 460
 461         add_wildcard(alias);
 462        return 1;
 463 }
 464
 465
 466
 467 static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
 468 {
 469     int len;
 470     char *tmp;
 471     len = sprintf (alias, "of:N%sT%s",
 472                     of->name[0] ? of->name : "*",
 473                     of->type[0] ? of->type : "*");
 474
 475     if (of->compatible[0])
 476         sprintf (&alias[len], "%sC%s",
 477                      of->type[0] ? "*" : "",
 478                      of->compatible);
 479
 480     /* Replace all whitespace with underscores */
 481     for (tmp = alias; tmp && *tmp; tmp++)
 482         if (isspace (*tmp))
 483             *tmp = '_';
 484
 485     add_wildcard(alias);
 486     return 1;
 487 }
 488
 489 static int do_vio_entry(const char *filename, struct vio_device_id *vio,
 490                 char *alias)
 491 {
 492         char *tmp;
 493
 494         sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*",
 495                         vio->compat[0] ? vio->compat : "*");
 496
 497         /* Replace all whitespace with underscores */
 498         for (tmp = alias; tmp && *tmp; tmp++)
 499                 if (isspace (*tmp))
 500                         *tmp = '_';
 501
 502         add_wildcard(alias);
 503         return 1;
 504 }
 505
 506 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 507
 508 static void do_input(char *alias,
 509                      kernel_ulong_t *arr, unsigned int min, unsigned int max)
 510 {
 511         unsigned int i;
 512
 513         for (i = min; i < max; i++)
 514                 if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
 515                         sprintf(alias + strlen(alias), "%X,*", i);
 516 }
 517
 518 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
 519 static int do_input_entry(const char *filename, struct input_device_id *id,
 520                           char *alias)
 521 {
 522         sprintf(alias, "input:");
 523
 524         ADD(alias, "b", id->flags & INPUT_DEVICE_ID_MATCH_BUS, id->bustype);
 525         ADD(alias, "v", id->flags & INPUT_DEVICE_ID_MATCH_VENDOR, id->vendor);
 526         ADD(alias, "p", id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT, id->product);
 527         ADD(alias, "e", id->flags & INPUT_DEVICE_ID_MATCH_VERSION, id->version);
 528
 529         sprintf(alias + strlen(alias), "-e*");
 530         if (id->flags & INPUT_DEVICE_ID_MATCH_EVBIT)
 531                 do_input(alias, id->evbit, 0, INPUT_DEVICE_ID_EV_MAX);
 532         sprintf(alias + strlen(alias), "k*");
 533         if (id->flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
 534                 do_input(alias, id->keybit,
 535                          INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
 536                          INPUT_DEVICE_ID_KEY_MAX);
 537         sprintf(alias + strlen(alias), "r*");
 538         if (id->flags & INPUT_DEVICE_ID_MATCH_RELBIT)
 539                 do_input(alias, id->relbit, 0, INPUT_DEVICE_ID_REL_MAX);
 540         sprintf(alias + strlen(alias), "a*");
 541         if (id->flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
 542                 do_input(alias, id->absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
 543         sprintf(alias + strlen(alias), "m*");
 544         if (id->flags & INPUT_DEVICE_ID_MATCH_MSCIT)
 545                 do_input(alias, id->mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
 546         sprintf(alias + strlen(alias), "l*");
 547         if (id->flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
 548                 do_input(alias, id->ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
 549         sprintf(alias + strlen(alias), "s*");
 550         if (id->flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
 551                 do_input(alias, id->sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
 552         sprintf(alias + strlen(alias), "f*");
 553         if (id->flags & INPUT_DEVICE_ID_MATCH_FFBIT)
 554                 do_input(alias, id->ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
 555         sprintf(alias + strlen(alias), "w*");
 556         if (id->flags & INPUT_DEVICE_ID_MATCH_SWBIT)
 557                 do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX);
 558         return 1;
 559 }
 560
 561 static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa,
 562                 char *alias)
 563 {
 564         if (eisa->sig[0])
 565                 sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", eisa->sig);
 566         else
 567                 strcat(alias, "*");
 568         return 1;
 569 }
 570
 571 /* Looks like: parisc:tNhvNrevNsvN */
 572 static int do_parisc_entry(const char *filename, struct parisc_device_id *id,
 573                 char *alias)
 574 {
 575         id->hw_type = TO_NATIVE(id->hw_type);
 576         id->hversion = TO_NATIVE(id->hversion);
 577         id->hversion_rev = TO_NATIVE(id->hversion_rev);
 578         id->sversion = TO_NATIVE(id->sversion);
 579
 580         strcpy(alias, "parisc:");
 581         ADD(alias, "t", id->hw_type != PA_HWTYPE_ANY_ID, id->hw_type);
 582         ADD(alias, "hv", id->hversion != PA_HVERSION_ANY_ID, id->hversion);
 583         ADD(alias, "rev", id->hversion_rev != PA_HVERSION_REV_ANY_ID, id->hversion_rev);
 584         ADD(alias, "sv", id->sversion != PA_SVERSION_ANY_ID, id->sversion);
 585
 586         add_wildcard(alias);
 587         return 1;
 588 }
 589
 590 /* Looks like: sdio:cNvNdN. */
 591 static int do_sdio_entry(const char *filename,
 592                         struct sdio_device_id *id, char *alias)
 593 {
 594         id->class = TO_NATIVE(id->class);
 595         id->vendor = TO_NATIVE(id->vendor);
 596         id->device = TO_NATIVE(id->device);
 597
 598         strcpy(alias, "sdio:");
 599         ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class);
 600         ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor);
 601         ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device);
 602         add_wildcard(alias);
 603         return 1;
 604 }
 605
 606 /* Looks like: ssb:vNidNrevN. */
 607 static int do_ssb_entry(const char *filename,
 608                         struct ssb_device_id *id, char *alias)
 609 {
 610         id->vendor = TO_NATIVE(id->vendor);
 611         id->coreid = TO_NATIVE(id->coreid);
 612         id->revision = TO_NATIVE(id->revision);
 613
 614         strcpy(alias, "ssb:");
 615         ADD(alias, "v", id->vendor != SSB_ANY_VENDOR, id->vendor);
 616         ADD(alias, "id", id->coreid != SSB_ANY_ID, id->coreid);
 617         ADD(alias, "rev", id->revision != SSB_ANY_REV, id->revision);
 618         add_wildcard(alias);
 619         return 1;
 620 }
 621
 622 /* Looks like: virtio:dNvN */
 623 static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
 624                            char *alias)
 625 {
 626         id->device = TO_NATIVE(id->device);
 627         id->vendor = TO_NATIVE(id->vendor);
 628
 629         strcpy(alias, "virtio:");
 630         ADD(alias, "d", 1, id->device);
 631         ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor);
 632
 633         add_wildcard(alias);
 634         return 1;
 635 }
 636
 637 /* Looks like: i2c:S */
 638 static int do_i2c_entry(const char *filename, struct i2c_device_id *id,
 639                         char *alias)
 640 {
 641         sprintf(alias, I2C_MODULE_PREFIX "%s", id->name);
 642
 643         return 1;
 644 }
 645
 646 static const struct dmifield {
 647         const char *prefix;
 648         int field;
 649 } dmi_fields[] = {
 650         { "bvn", DMI_BIOS_VENDOR },
 651         { "bvr", DMI_BIOS_VERSION },
 652         { "bd",  DMI_BIOS_DATE },
 653         { "svn", DMI_SYS_VENDOR },
 654         { "pn",  DMI_PRODUCT_NAME },
 655         { "pvr", DMI_PRODUCT_VERSION },
 656         { "rvn", DMI_BOARD_VENDOR },
 657         { "rn",  DMI_BOARD_NAME },
 658         { "rvr", DMI_BOARD_VERSION },
 659         { "cvn", DMI_CHASSIS_VENDOR },
 660         { "ct",  DMI_CHASSIS_TYPE },
 661         { "cvr", DMI_CHASSIS_VERSION },
 662         { NULL,  DMI_NONE }
 663 };
 664
 665 static void dmi_ascii_filter(char *d, const char *s)
 666 {
 667         /* Filter out characters we don't want to see in the modalias string */
 668         for (; *s; s++)
 669                 if (*s > ' ' && *s < 127 && *s != ':')
 670                         *(d++) = *s;
 671
 672         *d = 0;
 673 }
 674
 675
 676 static int do_dmi_entry(const char *filename, struct dmi_system_id *id,
 677                         char *alias)
 678 {
 679         int i, j;
 680
 681         sprintf(alias, "dmi*");
 682
 683         for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
 684                 for (j = 0; j < 4; j++) {
 685                         if (id->matches[j].slot &&
 686                             id->matches[j].slot == dmi_fields[i].field) {
 687                                 sprintf(alias + strlen(alias), ":%s*",
 688                                         dmi_fields[i].prefix);
 689                                 dmi_ascii_filter(alias + strlen(alias),
 690                                                  id->matches[j].substr);
 691                                 strcat(alias, "*");
 692                         }
 693                 }
 694         }
 695
 696         strcat(alias, ":");
 697         return 1;
 698 }
 699 /* Ignore any prefix, eg. some architectures prepend _ */
 700 static inline int sym_is(const char *symbol, const char *name)
 701 {
 702         const char *match;
 703
 704         match = strstr(symbol, name);
 705         if (!match)
 706                 return 0;
 707         return match[strlen(symbol)] == '\0';
 708 }
 709
 710 static void do_table(void *symval, unsigned long size,
 711                      unsigned long id_size,
 712                      const char *device_id,
 713                      void *function,
 714                      struct module *mod)
 715 {
 716         unsigned int i;
 717         char alias[500];
 718         int (*do_entry)(const char *, void *entry, char *alias) = function;
 719
 720         device_id_check(mod->name, device_id, size, id_size, symval);
 721         /* Leave last one: it's the terminator. */
 722         size -= id_size;
 723
 724         for (i = 0; i < size; i += id_size) {
 725                 if (do_entry(mod->name, symval+i, alias)) {
 726                         buf_printf(&mod->dev_table_buf,
 727                                    "MODULE_ALIAS(\"%s\");\n", alias);
 728                 }
 729         }
 730 }
 731
 732 /* Create MODULE_ALIAS() statements.
 733  * At this time, we cannot write the actual output C source yet,
 734  * so we write into the mod->dev_table_buf buffer. */
 735 void handle_moddevtable(struct module *mod, struct elf_info *info,
 736                         Elf_Sym *sym, const char *symname)
 737 {
 738         void *symval;
 739         char *zeros = NULL;
 740
 741         /* We're looking for a section relative symbol */
 742         if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum)
 743                 return;
 744
 745         /* Handle all-NULL symbols allocated into .bss */
 746         if (info->sechdrs[sym->st_shndx].sh_type & SHT_NOBITS) {
 747                 zeros = calloc(1, sym->st_size);
 748                 symval = zeros;
 749         } else {
 750                 symval = (void *)info->hdr
 751                         + info->sechdrs[sym->st_shndx].sh_offset
 752                         + sym->st_value;
 753         }
 754
 755         if (sym_is(symname, "__mod_pci_device_table"))
 756                 do_table(symval, sym->st_size,
 757                          sizeof(struct pci_device_id), "pci",
 758                          do_pci_entry, mod);
 759         else if (sym_is(symname, "__mod_usb_device_table"))
 760                 /* special case to handle bcdDevice ranges */
 761                 do_usb_table(symval, sym->st_size, mod);
 762         else if (sym_is(symname, "__mod_hid_device_table"))
 763                 do_table(symval, sym->st_size,
 764                          sizeof(struct hid_device_id), "hid",
 765                          do_hid_entry, mod);
 766         else if (sym_is(symname, "__mod_ieee1394_device_table"))
 767                 do_table(symval, sym->st_size,
 768                          sizeof(struct ieee1394_device_id), "ieee1394",
 769                          do_ieee1394_entry, mod);
 770         else if (sym_is(symname, "__mod_ccw_device_table"))
 771                 do_table(symval, sym->st_size,
 772                          sizeof(struct ccw_device_id), "ccw",
 773                          do_ccw_entry, mod);
 774         else if (sym_is(symname, "__mod_ap_device_table"))
 775                 do_table(symval, sym->st_size,
 776                          sizeof(struct ap_device_id), "ap",
 777                          do_ap_entry, mod);
 778         else if (sym_is(symname, "__mod_css_device_table"))
 779                 do_table(symval, sym->st_size,
 780                          sizeof(struct css_device_id), "css",
 781                          do_css_entry, mod);
 782         else if (sym_is(symname, "__mod_serio_device_table"))
 783                 do_table(symval, sym->st_size,
 784                          sizeof(struct serio_device_id), "serio",
 785                          do_serio_entry, mod);
 786         else if (sym_is(symname, "__mod_acpi_device_table"))
 787                 do_table(symval, sym->st_size,
 788                          sizeof(struct acpi_device_id), "acpi",
 789                          do_acpi_entry, mod);
 790         else if (sym_is(symname, "__mod_pnp_device_table"))
 791                 do_pnp_device_entry(symval, sym->st_size, mod);
 792         else if (sym_is(symname, "__mod_pnp_card_device_table"))
 793                 do_pnp_card_entries(symval, sym->st_size, mod);
 794         else if (sym_is(symname, "__mod_pcmcia_device_table"))
 795                 do_table(symval, sym->st_size,
 796                          sizeof(struct pcmcia_device_id), "pcmcia",
 797                          do_pcmcia_entry, mod);
 798         else if (sym_is(symname, "__mod_of_device_table"))
 799                 do_table(symval, sym->st_size,
 800                          sizeof(struct of_device_id), "of",
 801                          do_of_entry, mod);
 802         else if (sym_is(symname, "__mod_vio_device_table"))
 803                 do_table(symval, sym->st_size,
 804                          sizeof(struct vio_device_id), "vio",
 805                          do_vio_entry, mod);
 806         else if (sym_is(symname, "__mod_input_device_table"))
 807                 do_table(symval, sym->st_size,
 808                          sizeof(struct input_device_id), "input",
 809                          do_input_entry, mod);
 810         else if (sym_is(symname, "__mod_eisa_device_table"))
 811                 do_table(symval, sym->st_size,
 812                          sizeof(struct eisa_device_id), "eisa",
 813                          do_eisa_entry, mod);
 814         else if (sym_is(symname, "__mod_parisc_device_table"))
 815                 do_table(symval, sym->st_size,
 816                          sizeof(struct parisc_device_id), "parisc",
 817                          do_parisc_entry, mod);
 818         else if (sym_is(symname, "__mod_sdio_device_table"))
 819                 do_table(symval, sym->st_size,
 820                          sizeof(struct sdio_device_id), "sdio",
 821                          do_sdio_entry, mod);
 822         else if (sym_is(symname, "__mod_ssb_device_table"))
 823                 do_table(symval, sym->st_size,
 824                          sizeof(struct ssb_device_id), "ssb",
 825                          do_ssb_entry, mod);
 826         else if (sym_is(symname, "__mod_virtio_device_table"))
 827                 do_table(symval, sym->st_size,
 828                          sizeof(struct virtio_device_id), "virtio",
 829                          do_virtio_entry, mod);
 830         else if (sym_is(symname, "__mod_i2c_device_table"))
 831                 do_table(symval, sym->st_size,
 832                          sizeof(struct i2c_device_id), "i2c",
 833                          do_i2c_entry, mod);
 834         else if (sym_is(symname, "__mod_dmi_device_table"))
 835                 do_table(symval, sym->st_size,
 836                          sizeof(struct dmi_system_id), "dmi",
 837                          do_dmi_entry, mod);
 838         free(zeros);
 839 }
 840
 841 /* Now add out buffered information to the generated C source */
 842 void add_moddevtable(struct buffer *buf, struct module *mod)
 843 {
 844         buf_printf(buf, "\n");
 845         buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
 846         free(mod->dev_table_buf.p);
 847 }