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