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->bus = TO_NATIVE(id->bus);
 214         id->vendor = TO_NATIVE(id->vendor);
 215         id->product = TO_NATIVE(id->product);
 216
 217         sprintf(alias, "hid:b%04X", id->bus);
 218         ADD(alias, "v", id->vendor != HID_ANY_ID, id->vendor);
 219         ADD(alias, "p", id->product != HID_ANY_ID, id->product);
 220
 221         return 1;
 222 }
 223
 224 /* Looks like: ieee1394:venNmoNspNverN */
 225 static int do_ieee1394_entry(const char *filename,
 226                              struct ieee1394_device_id *id, char *alias)
 227 {
 228         id->match_flags = TO_NATIVE(id->match_flags);
 229         id->vendor_id = TO_NATIVE(id->vendor_id);
 230         id->model_id = TO_NATIVE(id->model_id);
 231         id->specifier_id = TO_NATIVE(id->specifier_id);
 232         id->version = TO_NATIVE(id->version);
 233
 234         strcpy(alias, "ieee1394:");
 235         ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID,
 236             id->vendor_id);
 237         ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID,
 238             id->model_id);
 239         ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID,
 240             id->specifier_id);
 241         ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION,
 242             id->version);
 243
 244         add_wildcard(alias);
 245         return 1;
 246 }
 247
 248 /* Looks like: pci:vNdNsvNsdNbcNscNiN. */
 249 static int do_pci_entry(const char *filename,
 250                         struct pci_device_id *id, char *alias)
 251 {
 252         /* Class field can be divided into these three. */
 253         unsigned char baseclass, subclass, interface,
 254                 baseclass_mask, subclass_mask, interface_mask;
 255
 256         id->vendor = TO_NATIVE(id->vendor);
 257         id->device = TO_NATIVE(id->device);
 258         id->subvendor = TO_NATIVE(id->subvendor);
 259         id->subdevice = TO_NATIVE(id->subdevice);
 260         id->class = TO_NATIVE(id->class);
 261         id->class_mask = TO_NATIVE(id->class_mask);
 262
 263         strcpy(alias, "pci:");
 264         ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor);
 265         ADD(alias, "d", id->device != PCI_ANY_ID, id->device);
 266         ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor);
 267         ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice);
 268
 269         baseclass = (id->class) >> 16;
 270         baseclass_mask = (id->class_mask) >> 16;
 271         subclass = (id->class) >> 8;
 272         subclass_mask = (id->class_mask) >> 8;
 273         interface = id->class;
 274         interface_mask = id->class_mask;
 275
 276         if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
 277             || (subclass_mask != 0 && subclass_mask != 0xFF)
 278             || (interface_mask != 0 && interface_mask != 0xFF)) {
 279                 warn("Can't handle masks in %s:%04X\n",
 280                      filename, id->class_mask);
 281                 return 0;
 282         }
 283
 284         ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
 285         ADD(alias, "sc", subclass_mask == 0xFF, subclass);
 286         ADD(alias, "i", interface_mask == 0xFF, interface);
 287         add_wildcard(alias);
 288         return 1;
 289 }
 290
 291 /* looks like: "ccw:tNmNdtNdmN" */
 292 static int do_ccw_entry(const char *filename,
 293                         struct ccw_device_id *id, char *alias)
 294 {
 295         id->match_flags = TO_NATIVE(id->match_flags);
 296         id->cu_type = TO_NATIVE(id->cu_type);
 297         id->cu_model = TO_NATIVE(id->cu_model);
 298         id->dev_type = TO_NATIVE(id->dev_type);
 299         id->dev_model = TO_NATIVE(id->dev_model);
 300
 301         strcpy(alias, "ccw:");
 302         ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
 303             id->cu_type);
 304         ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
 305             id->cu_model);
 306         ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
 307             id->dev_type);
 308         ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
 309             id->dev_model);
 310         add_wildcard(alias);
 311         return 1;
 312 }
 313
 314 /* looks like: "ap:tN" */
 315 static int do_ap_entry(const char *filename,
 316                        struct ap_device_id *id, char *alias)
 317 {
 318         sprintf(alias, "ap:t%02X*", id->dev_type);
 319         return 1;
 320 }
 321
 322 /* looks like: "css:tN" */
 323 static int do_css_entry(const char *filename,
 324                         struct css_device_id *id, char *alias)
 325 {
 326         sprintf(alias, "css:t%01X", id->type);
 327         return 1;
 328 }
 329
 330 /* Looks like: "serio:tyNprNidNexN" */
 331 static int do_serio_entry(const char *filename,
 332                           struct serio_device_id *id, char *alias)
 333 {
 334         id->type = TO_NATIVE(id->type);
 335         id->proto = TO_NATIVE(id->proto);
 336         id->id = TO_NATIVE(id->id);
 337         id->extra = TO_NATIVE(id->extra);
 338
 339         strcpy(alias, "serio:");
 340         ADD(alias, "ty", id->type != SERIO_ANY, id->type);
 341         ADD(alias, "pr", id->proto != SERIO_ANY, id->proto);
 342         ADD(alias, "id", id->id != SERIO_ANY, id->id);
 343         ADD(alias, "ex", id->extra != SERIO_ANY, id->extra);
 344
 345         add_wildcard(alias);
 346         return 1;
 347 }
 348
 349 /* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
 350 static int do_acpi_entry(const char *filename,
 351                         struct acpi_device_id *id, char *alias)
 352 {
 353         sprintf(alias, "acpi*:%s:*", id->id);
 354         return 1;
 355 }
 356
 357 /* looks like: "pnp:dD" */
 358 static void do_pnp_device_entry(void *symval, unsigned long size,
 359                                 struct module *mod)
 360 {
 361         const unsigned long id_size = sizeof(struct pnp_device_id);
 362         const unsigned int count = (size / id_size)-1;
 363         const struct pnp_device_id *devs = symval;
 364         unsigned int i;
 365
 366         device_id_check(mod->name, "pnp", size, id_size, symval);
 367
 368         for (i = 0; i < count; i++) {
 369                 const char *id = (char *)devs[i].id;
 370                 char acpi_id[sizeof(devs[0].id)];
 371                 int j;
 372
 373                 buf_printf(&mod->dev_table_buf,
 374                            "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 375
 376                 /* fix broken pnp bus lowercasing */
 377                 for (j = 0; j < sizeof(acpi_id); j++)
 378                         acpi_id[j] = toupper(id[j]);
 379                 buf_printf(&mod->dev_table_buf,
 380                            "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 381         }
 382 }
 383
 384 /* looks like: "pnp:dD" for every device of the card */
 385 static void do_pnp_card_entries(void *symval, unsigned long size,
 386                                 struct module *mod)
 387 {
 388         const unsigned long id_size = sizeof(struct pnp_card_device_id);
 389         const unsigned int count = (size / id_size)-1;
 390         const struct pnp_card_device_id *cards = symval;
 391         unsigned int i;
 392
 393         device_id_check(mod->name, "pnp", size, id_size, symval);
 394
 395         for (i = 0; i < count; i++) {
 396                 unsigned int j;
 397                 const struct pnp_card_device_id *card = &cards[i];
 398
 399                 for (j = 0; j < PNP_MAX_DEVICES; j++) {
 400                         const char *id = (char *)card->devs[j].id;
 401                         int i2, j2;
 402                         int dup = 0;
 403
 404                         if (!id[0])
 405                                 break;
 406
 407                         /* find duplicate, already added value */
 408                         for (i2 = 0; i2 < i && !dup; i2++) {
 409                                 const struct pnp_card_device_id *card2 = &cards[i2];
 410
 411                                 for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
 412                                         const char *id2 = (char *)card2->devs[j2].id;
 413
 414                                         if (!id2[0])
 415                                                 break;
 416
 417                                         if (!strcmp(id, id2)) {
 418                                                 dup = 1;
 419                                                 break;
 420                                         }
 421                                 }
 422                         }
 423
 424                         /* add an individual alias for every device entry */
 425                         if (!dup) {
 426                                 char acpi_id[sizeof(card->devs[0].id)];
 427                                 int k;
 428
 429                                 buf_printf(&mod->dev_table_buf,
 430                                            "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 431
 432                                 /* fix broken pnp bus lowercasing */
 433                                 for (k = 0; k < sizeof(acpi_id); k++)
 434                                         acpi_id[k] = toupper(id[k]);
 435                                 buf_printf(&mod->dev_table_buf,
 436                                            "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 437                         }
 438                 }
 439         }
 440 }
 441
 442 /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
 443 static int do_pcmcia_entry(const char *filename,
 444                            struct pcmcia_device_id *id, char *alias)
 445 {
 446         unsigned int i;
 447
 448         id->match_flags = TO_NATIVE(id->match_flags);
 449         id->manf_id = TO_NATIVE(id->manf_id);
 450         id->card_id = TO_NATIVE(id->card_id);
 451         id->func_id = TO_NATIVE(id->func_id);
 452         id->function = TO_NATIVE(id->function);
 453         id->device_no = TO_NATIVE(id->device_no);
 454
 455         for (i=0; i<4; i++) {
 456                 id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]);
 457        }
 458
 459        strcpy(alias, "pcmcia:");
 460        ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
 461            id->manf_id);
 462        ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
 463            id->card_id);
 464        ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
 465            id->func_id);
 466        ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
 467            id->function);
 468        ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
 469            id->device_no);
 470        ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]);
 471        ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]);
 472        ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]);
 473        ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]);
 474
 475         add_wildcard(alias);
 476        return 1;
 477 }
 478
 479
 480
 481 static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
 482 {
 483     int len;
 484     char *tmp;
 485     len = sprintf (alias, "of:N%sT%s",
 486                     of->name[0] ? of->name : "*",
 487                     of->type[0] ? of->type : "*");
 488
 489     if (of->compatible[0])
 490         sprintf (&alias[len], "%sC%s",
 491                      of->type[0] ? "*" : "",
 492                      of->compatible);
 493
 494     /* Replace all whitespace with underscores */
 495     for (tmp = alias; tmp && *tmp; tmp++)
 496         if (isspace (*tmp))
 497             *tmp = '_';
 498
 499     add_wildcard(alias);
 500     return 1;
 501 }
 502
 503 static int do_vio_entry(const char *filename, struct vio_device_id *vio,
 504                 char *alias)
 505 {
 506         char *tmp;
 507
 508         sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*",
 509                         vio->compat[0] ? vio->compat : "*");
 510
 511         /* Replace all whitespace with underscores */
 512         for (tmp = alias; tmp && *tmp; tmp++)
 513                 if (isspace (*tmp))
 514                         *tmp = '_';
 515
 516         add_wildcard(alias);
 517         return 1;
 518 }
 519
 520 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 521
 522 static void do_input(char *alias,
 523                      kernel_ulong_t *arr, unsigned int min, unsigned int max)
 524 {
 525         unsigned int i;
 526
 527         for (i = min; i < max; i++)
 528                 if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
 529                         sprintf(alias + strlen(alias), "%X,*", i);
 530 }
 531
 532 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
 533 static int do_input_entry(const char *filename, struct input_device_id *id,
 534                           char *alias)
 535 {
 536         sprintf(alias, "input:");
 537
 538         ADD(alias, "b", id->flags & INPUT_DEVICE_ID_MATCH_BUS, id->bustype);
 539         ADD(alias, "v", id->flags & INPUT_DEVICE_ID_MATCH_VENDOR, id->vendor);
 540         ADD(alias, "p", id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT, id->product);
 541         ADD(alias, "e", id->flags & INPUT_DEVICE_ID_MATCH_VERSION, id->version);
 542
 543         sprintf(alias + strlen(alias), "-e*");
 544         if (id->flags & INPUT_DEVICE_ID_MATCH_EVBIT)
 545                 do_input(alias, id->evbit, 0, INPUT_DEVICE_ID_EV_MAX);
 546         sprintf(alias + strlen(alias), "k*");
 547         if (id->flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
 548                 do_input(alias, id->keybit,
 549                          INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
 550                          INPUT_DEVICE_ID_KEY_MAX);
 551         sprintf(alias + strlen(alias), "r*");
 552         if (id->flags & INPUT_DEVICE_ID_MATCH_RELBIT)
 553                 do_input(alias, id->relbit, 0, INPUT_DEVICE_ID_REL_MAX);
 554         sprintf(alias + strlen(alias), "a*");
 555         if (id->flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
 556                 do_input(alias, id->absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
 557         sprintf(alias + strlen(alias), "m*");
 558         if (id->flags & INPUT_DEVICE_ID_MATCH_MSCIT)
 559                 do_input(alias, id->mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
 560         sprintf(alias + strlen(alias), "l*");
 561         if (id->flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
 562                 do_input(alias, id->ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
 563         sprintf(alias + strlen(alias), "s*");
 564         if (id->flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
 565                 do_input(alias, id->sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
 566         sprintf(alias + strlen(alias), "f*");
 567         if (id->flags & INPUT_DEVICE_ID_MATCH_FFBIT)
 568                 do_input(alias, id->ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
 569         sprintf(alias + strlen(alias), "w*");
 570         if (id->flags & INPUT_DEVICE_ID_MATCH_SWBIT)
 571                 do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX);
 572         return 1;
 573 }
 574
 575 static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa,
 576                 char *alias)
 577 {
 578         if (eisa->sig[0])
 579                 sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", eisa->sig);
 580         else
 581                 strcat(alias, "*");
 582         return 1;
 583 }
 584
 585 /* Looks like: parisc:tNhvNrevNsvN */
 586 static int do_parisc_entry(const char *filename, struct parisc_device_id *id,
 587                 char *alias)
 588 {
 589         id->hw_type = TO_NATIVE(id->hw_type);
 590         id->hversion = TO_NATIVE(id->hversion);
 591         id->hversion_rev = TO_NATIVE(id->hversion_rev);
 592         id->sversion = TO_NATIVE(id->sversion);
 593
 594         strcpy(alias, "parisc:");
 595         ADD(alias, "t", id->hw_type != PA_HWTYPE_ANY_ID, id->hw_type);
 596         ADD(alias, "hv", id->hversion != PA_HVERSION_ANY_ID, id->hversion);
 597         ADD(alias, "rev", id->hversion_rev != PA_HVERSION_REV_ANY_ID, id->hversion_rev);
 598         ADD(alias, "sv", id->sversion != PA_SVERSION_ANY_ID, id->sversion);
 599
 600         add_wildcard(alias);
 601         return 1;
 602 }
 603
 604 /* Looks like: sdio:cNvNdN. */
 605 static int do_sdio_entry(const char *filename,
 606                         struct sdio_device_id *id, char *alias)
 607 {
 608         id->class = TO_NATIVE(id->class);
 609         id->vendor = TO_NATIVE(id->vendor);
 610         id->device = TO_NATIVE(id->device);
 611
 612         strcpy(alias, "sdio:");
 613         ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class);
 614         ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor);
 615         ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device);
 616         add_wildcard(alias);
 617         return 1;
 618 }
 619
 620 /* Looks like: ssb:vNidNrevN. */
 621 static int do_ssb_entry(const char *filename,
 622                         struct ssb_device_id *id, char *alias)
 623 {
 624         id->vendor = TO_NATIVE(id->vendor);
 625         id->coreid = TO_NATIVE(id->coreid);
 626         id->revision = TO_NATIVE(id->revision);
 627
 628         strcpy(alias, "ssb:");
 629         ADD(alias, "v", id->vendor != SSB_ANY_VENDOR, id->vendor);
 630         ADD(alias, "id", id->coreid != SSB_ANY_ID, id->coreid);
 631         ADD(alias, "rev", id->revision != SSB_ANY_REV, id->revision);
 632         add_wildcard(alias);
 633         return 1;
 634 }
 635
 636 /* Looks like: virtio:dNvN */
 637 static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
 638                            char *alias)
 639 {
 640         id->device = TO_NATIVE(id->device);
 641         id->vendor = TO_NATIVE(id->vendor);
 642
 643         strcpy(alias, "virtio:");
 644         ADD(alias, "d", id->device != VIRTIO_DEV_ANY_ID, id->device);
 645         ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor);
 646
 647         add_wildcard(alias);
 648         return 1;
 649 }
 650
 651 /* Looks like: i2c:S */
 652 static int do_i2c_entry(const char *filename, struct i2c_device_id *id,
 653                         char *alias)
 654 {
 655         sprintf(alias, I2C_MODULE_PREFIX "%s", id->name);
 656
 657         return 1;
 658 }
 659
 660 static const struct dmifield {
 661         const char *prefix;
 662         int field;
 663 } dmi_fields[] = {
 664         { "bvn", DMI_BIOS_VENDOR },
 665         { "bvr", DMI_BIOS_VERSION },
 666         { "bd",  DMI_BIOS_DATE },
 667         { "svn", DMI_SYS_VENDOR },
 668         { "pn",  DMI_PRODUCT_NAME },
 669         { "pvr", DMI_PRODUCT_VERSION },
 670         { "rvn", DMI_BOARD_VENDOR },
 671         { "rn",  DMI_BOARD_NAME },
 672         { "rvr", DMI_BOARD_VERSION },
 673         { "cvn", DMI_CHASSIS_VENDOR },
 674         { "ct",  DMI_CHASSIS_TYPE },
 675         { "cvr", DMI_CHASSIS_VERSION },
 676         { NULL,  DMI_NONE }
 677 };
 678
 679 static void dmi_ascii_filter(char *d, const char *s)
 680 {
 681         /* Filter out characters we don't want to see in the modalias string */
 682         for (; *s; s++)
 683                 if (*s > ' ' && *s < 127 && *s != ':')
 684                         *(d++) = *s;
 685
 686         *d = 0;
 687 }
 688
 689
 690 static int do_dmi_entry(const char *filename, struct dmi_system_id *id,
 691                         char *alias)
 692 {
 693         int i, j;
 694
 695         sprintf(alias, "dmi*");
 696
 697         for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
 698                 for (j = 0; j < 4; j++) {
 699                         if (id->matches[j].slot &&
 700                             id->matches[j].slot == dmi_fields[i].field) {
 701                                 sprintf(alias + strlen(alias), ":%s*",
 702                                         dmi_fields[i].prefix);
 703                                 dmi_ascii_filter(alias + strlen(alias),
 704                                                  id->matches[j].substr);
 705                                 strcat(alias, "*");
 706                         }
 707                 }
 708         }
 709
 710         strcat(alias, ":");
 711         return 1;
 712 }
 713
 714 static int do_platform_entry(const char *filename,
 715                              struct platform_device_id *id, char *alias)
 716 {
 717         sprintf(alias, PLATFORM_MODULE_PREFIX "%s", id->name);
 718         return 1;
 719 }
 720
 721 /* Ignore any prefix, eg. some architectures prepend _ */
 722 static inline int sym_is(const char *symbol, const char *name)
 723 {
 724         const char *match;
 725
 726         match = strstr(symbol, name);
 727         if (!match)
 728                 return 0;
 729         return match[strlen(symbol)] == '\0';
 730 }
 731
 732 static void do_table(void *symval, unsigned long size,
 733                      unsigned long id_size,
 734                      const char *device_id,
 735                      void *function,
 736                      struct module *mod)
 737 {
 738         unsigned int i;
 739         char alias[500];
 740         int (*do_entry)(const char *, void *entry, char *alias) = function;
 741
 742         device_id_check(mod->name, device_id, size, id_size, symval);
 743         /* Leave last one: it's the terminator. */
 744         size -= id_size;
 745
 746         for (i = 0; i < size; i += id_size) {
 747                 if (do_entry(mod->name, symval+i, alias)) {
 748                         buf_printf(&mod->dev_table_buf,
 749                                    "MODULE_ALIAS(\"%s\");\n", alias);
 750                 }
 751         }
 752 }
 753
 754 /* Create MODULE_ALIAS() statements.
 755  * At this time, we cannot write the actual output C source yet,
 756  * so we write into the mod->dev_table_buf buffer. */
 757 void handle_moddevtable(struct module *mod, struct elf_info *info,
 758                         Elf_Sym *sym, const char *symname)
 759 {
 760         void *symval;
 761         char *zeros = NULL;
 762
 763         /* We're looking for a section relative symbol */
 764         if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum)
 765                 return;
 766
 767         /* Handle all-NULL symbols allocated into .bss */
 768         if (info->sechdrs[sym->st_shndx].sh_type & SHT_NOBITS) {
 769                 zeros = calloc(1, sym->st_size);
 770                 symval = zeros;
 771         } else {
 772                 symval = (void *)info->hdr
 773                         + info->sechdrs[sym->st_shndx].sh_offset
 774                         + sym->st_value;
 775         }
 776
 777         if (sym_is(symname, "__mod_pci_device_table"))
 778                 do_table(symval, sym->st_size,
 779                          sizeof(struct pci_device_id), "pci",
 780                          do_pci_entry, mod);
 781         else if (sym_is(symname, "__mod_usb_device_table"))
 782                 /* special case to handle bcdDevice ranges */
 783                 do_usb_table(symval, sym->st_size, mod);
 784         else if (sym_is(symname, "__mod_hid_device_table"))
 785                 do_table(symval, sym->st_size,
 786                          sizeof(struct hid_device_id), "hid",
 787                          do_hid_entry, mod);
 788         else if (sym_is(symname, "__mod_ieee1394_device_table"))
 789                 do_table(symval, sym->st_size,
 790                          sizeof(struct ieee1394_device_id), "ieee1394",
 791                          do_ieee1394_entry, mod);
 792         else if (sym_is(symname, "__mod_ccw_device_table"))
 793                 do_table(symval, sym->st_size,
 794                          sizeof(struct ccw_device_id), "ccw",
 795                          do_ccw_entry, mod);
 796         else if (sym_is(symname, "__mod_ap_device_table"))
 797                 do_table(symval, sym->st_size,
 798                          sizeof(struct ap_device_id), "ap",
 799                          do_ap_entry, mod);
 800         else if (sym_is(symname, "__mod_css_device_table"))
 801                 do_table(symval, sym->st_size,
 802                          sizeof(struct css_device_id), "css",
 803                          do_css_entry, mod);
 804         else if (sym_is(symname, "__mod_serio_device_table"))
 805                 do_table(symval, sym->st_size,
 806                          sizeof(struct serio_device_id), "serio",
 807                          do_serio_entry, mod);
 808         else if (sym_is(symname, "__mod_acpi_device_table"))
 809                 do_table(symval, sym->st_size,
 810                          sizeof(struct acpi_device_id), "acpi",
 811                          do_acpi_entry, mod);
 812         else if (sym_is(symname, "__mod_pnp_device_table"))
 813                 do_pnp_device_entry(symval, sym->st_size, mod);
 814         else if (sym_is(symname, "__mod_pnp_card_device_table"))
 815                 do_pnp_card_entries(symval, sym->st_size, mod);
 816         else if (sym_is(symname, "__mod_pcmcia_device_table"))
 817                 do_table(symval, sym->st_size,
 818                          sizeof(struct pcmcia_device_id), "pcmcia",
 819                          do_pcmcia_entry, mod);
 820         else if (sym_is(symname, "__mod_of_device_table"))
 821                 do_table(symval, sym->st_size,
 822                          sizeof(struct of_device_id), "of",
 823                          do_of_entry, mod);
 824         else if (sym_is(symname, "__mod_vio_device_table"))
 825                 do_table(symval, sym->st_size,
 826                          sizeof(struct vio_device_id), "vio",
 827                          do_vio_entry, mod);
 828         else if (sym_is(symname, "__mod_input_device_table"))
 829                 do_table(symval, sym->st_size,
 830                          sizeof(struct input_device_id), "input",
 831                          do_input_entry, mod);
 832         else if (sym_is(symname, "__mod_eisa_device_table"))
 833                 do_table(symval, sym->st_size,
 834                          sizeof(struct eisa_device_id), "eisa",
 835                          do_eisa_entry, mod);
 836         else if (sym_is(symname, "__mod_parisc_device_table"))
 837                 do_table(symval, sym->st_size,
 838                          sizeof(struct parisc_device_id), "parisc",
 839                          do_parisc_entry, mod);
 840         else if (sym_is(symname, "__mod_sdio_device_table"))
 841                 do_table(symval, sym->st_size,
 842                          sizeof(struct sdio_device_id), "sdio",
 843                          do_sdio_entry, mod);
 844         else if (sym_is(symname, "__mod_ssb_device_table"))
 845                 do_table(symval, sym->st_size,
 846                          sizeof(struct ssb_device_id), "ssb",
 847                          do_ssb_entry, mod);
 848         else if (sym_is(symname, "__mod_virtio_device_table"))
 849                 do_table(symval, sym->st_size,
 850                          sizeof(struct virtio_device_id), "virtio",
 851                          do_virtio_entry, mod);
 852         else if (sym_is(symname, "__mod_i2c_device_table"))
 853                 do_table(symval, sym->st_size,
 854                          sizeof(struct i2c_device_id), "i2c",
 855                          do_i2c_entry, mod);
 856         else if (sym_is(symname, "__mod_dmi_device_table"))
 857                 do_table(symval, sym->st_size,
 858                          sizeof(struct dmi_system_id), "dmi",
 859                          do_dmi_entry, mod);
 860         else if (sym_is(symname, "__mod_platform_device_table"))
 861                 do_table(symval, sym->st_size,
 862                          sizeof(struct platform_device_id), "platform",
 863                          do_platform_entry, mod);
 864         free(zeros);
 865 }
 866
 867 /* Now add out buffered information to the generated C source */
 868 void add_moddevtable(struct buffer *buf, struct module *mod)
 869 {
 870         buf_printf(buf, "\n");
 871         buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
 872         free(mod->dev_table_buf.p);
 873 }