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 unsigned int cross_build = 0;
  55 /**
  56  * Check that sizeof(device_id type) are consistent with size of section
  57  * in .o file. If in-consistent then userspace and kernel does not agree
  58  * on actual size which is a bug.
  59  * Also verify that the final entry in the table is all zeros.
  60  * Ignore both checks if build host differ from target host and size differs.
  61  **/
  62 static void device_id_check(const char *modname, const char *device_id,
  63                             unsigned long size, unsigned long id_size,
  64                             void *symval)
  65 {
  66         int i;
  67
  68         if (size % id_size || size < id_size) {
  69                 if (cross_build != 0)
  70                         return;
  71                 fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
  72                       "of the size of section __mod_%s_device_table=%lu.\n"
  73                       "Fix definition of struct %s_device_id "
  74                       "in mod_devicetable.h\n",
  75                       modname, device_id, id_size, device_id, size, device_id);
  76         }
  77         /* Verify last one is a terminator */
  78         for (i = 0; i < id_size; i++ ) {
  79                 if (*(uint8_t*)(symval+size-id_size+i)) {
  80                         fprintf(stderr,"%s: struct %s_device_id is %lu bytes.  "
  81                                 "The last of %lu is:\n",
  82                                 modname, device_id, id_size, size / id_size);
  83                         for (i = 0; i < id_size; i++ )
  84                                 fprintf(stderr,"0x%02x ",
  85                                         *(uint8_t*)(symval+size-id_size+i) );
  86                         fprintf(stderr,"\n");
  87                         fatal("%s: struct %s_device_id is not terminated "
  88                                 "with a NULL entry!\n", modname, device_id);
  89                 }
  90         }
  91 }
  92
  93 /* USB is special because the bcdDevice can be matched against a numeric range */
  94 /* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipN" */
  95 static void do_usb_entry(struct usb_device_id *id,
  96                          unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
  97                          unsigned char range_lo, unsigned char range_hi,
  98                          struct module *mod)
  99 {
 100         char alias[500];
 101         strcpy(alias, "usb:");
 102         ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR,
 103             id->idVendor);
 104         ADD(alias, "p", id->match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
 105             id->idProduct);
 106
 107         strcat(alias, "d");
 108         if (bcdDevice_initial_digits)
 109                 sprintf(alias + strlen(alias), "%0*X",
 110                         bcdDevice_initial_digits, bcdDevice_initial);
 111         if (range_lo == range_hi)
 112                 sprintf(alias + strlen(alias), "%u", range_lo);
 113         else if (range_lo > 0 || range_hi < 9)
 114                 sprintf(alias + strlen(alias), "[%u-%u]", range_lo, range_hi);
 115         if (bcdDevice_initial_digits < (sizeof(id->bcdDevice_lo) * 2 - 1))
 116                 strcat(alias, "*");
 117
 118         ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
 119             id->bDeviceClass);
 120         ADD(alias, "dsc",
 121             id->match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
 122             id->bDeviceSubClass);
 123         ADD(alias, "dp",
 124             id->match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
 125             id->bDeviceProtocol);
 126         ADD(alias, "ic",
 127             id->match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
 128             id->bInterfaceClass);
 129         ADD(alias, "isc",
 130             id->match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
 131             id->bInterfaceSubClass);
 132         ADD(alias, "ip",
 133             id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
 134             id->bInterfaceProtocol);
 135
 136         /* Always end in a wildcard, for future extension */
 137         if (alias[strlen(alias)-1] != '*')
 138                 strcat(alias, "*");
 139         buf_printf(&mod->dev_table_buf,
 140                    "MODULE_ALIAS(\"%s\");\n", alias);
 141 }
 142
 143 static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod)
 144 {
 145         unsigned int devlo, devhi;
 146         unsigned char chi, clo;
 147         int ndigits;
 148
 149         id->match_flags = TO_NATIVE(id->match_flags);
 150         id->idVendor = TO_NATIVE(id->idVendor);
 151         id->idProduct = TO_NATIVE(id->idProduct);
 152
 153         devlo = id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
 154                 TO_NATIVE(id->bcdDevice_lo) : 0x0U;
 155         devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
 156                 TO_NATIVE(id->bcdDevice_hi) : ~0x0U;
 157
 158         /*
 159          * Some modules (visor) have empty slots as placeholder for
 160          * run-time specification that results in catch-all alias
 161          */
 162         if (!(id->idVendor | id->idProduct | id->bDeviceClass | id->bInterfaceClass))
 163                 return;
 164
 165         /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
 166         for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
 167                 clo = devlo & 0xf;
 168                 chi = devhi & 0xf;
 169                 if (chi > 9)    /* it's bcd not hex */
 170                         chi = 9;
 171                 devlo >>= 4;
 172                 devhi >>= 4;
 173
 174                 if (devlo == devhi || !ndigits) {
 175                         do_usb_entry(id, devlo, ndigits, clo, chi, mod);
 176                         break;
 177                 }
 178
 179                 if (clo > 0)
 180                         do_usb_entry(id, devlo++, ndigits, clo, 9, mod);
 181
 182                 if (chi < 9)
 183                         do_usb_entry(id, devhi--, ndigits, 0, chi, mod);
 184         }
 185 }
 186
 187 static void do_usb_table(void *symval, unsigned long size,
 188                          struct module *mod)
 189 {
 190         unsigned int i;
 191         const unsigned long id_size = sizeof(struct usb_device_id);
 192
 193         device_id_check(mod->name, "usb", size, id_size, symval);
 194
 195         /* Leave last one: it's the terminator. */
 196         size -= id_size;
 197
 198         for (i = 0; i < size; i += id_size)
 199                 do_usb_entry_multi(symval + i, mod);
 200 }
 201
 202 /* Looks like: ieee1394:venNmoNspNverN */
 203 static int do_ieee1394_entry(const char *filename,
 204                              struct ieee1394_device_id *id, char *alias)
 205 {
 206         id->match_flags = TO_NATIVE(id->match_flags);
 207         id->vendor_id = TO_NATIVE(id->vendor_id);
 208         id->model_id = TO_NATIVE(id->model_id);
 209         id->specifier_id = TO_NATIVE(id->specifier_id);
 210         id->version = TO_NATIVE(id->version);
 211
 212         strcpy(alias, "ieee1394:");
 213         ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID,
 214             id->vendor_id);
 215         ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID,
 216             id->model_id);
 217         ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID,
 218             id->specifier_id);
 219         ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION,
 220             id->version);
 221
 222         return 1;
 223 }
 224
 225 /* Looks like: pci:vNdNsvNsdNbcNscNiN. */
 226 static int do_pci_entry(const char *filename,
 227                         struct pci_device_id *id, char *alias)
 228 {
 229         /* Class field can be divided into these three. */
 230         unsigned char baseclass, subclass, interface,
 231                 baseclass_mask, subclass_mask, interface_mask;
 232
 233         id->vendor = TO_NATIVE(id->vendor);
 234         id->device = TO_NATIVE(id->device);
 235         id->subvendor = TO_NATIVE(id->subvendor);
 236         id->subdevice = TO_NATIVE(id->subdevice);
 237         id->class = TO_NATIVE(id->class);
 238         id->class_mask = TO_NATIVE(id->class_mask);
 239
 240         strcpy(alias, "pci:");
 241         ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor);
 242         ADD(alias, "d", id->device != PCI_ANY_ID, id->device);
 243         ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor);
 244         ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice);
 245
 246         baseclass = (id->class) >> 16;
 247         baseclass_mask = (id->class_mask) >> 16;
 248         subclass = (id->class) >> 8;
 249         subclass_mask = (id->class_mask) >> 8;
 250         interface = id->class;
 251         interface_mask = id->class_mask;
 252
 253         if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
 254             || (subclass_mask != 0 && subclass_mask != 0xFF)
 255             || (interface_mask != 0 && interface_mask != 0xFF)) {
 256                 warn("Can't handle masks in %s:%04X\n",
 257                      filename, id->class_mask);
 258                 return 0;
 259         }
 260
 261         ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
 262         ADD(alias, "sc", subclass_mask == 0xFF, subclass);
 263         ADD(alias, "i", interface_mask == 0xFF, interface);
 264         return 1;
 265 }
 266
 267 /* looks like: "ccw:tNmNdtNdmN" */
 268 static int do_ccw_entry(const char *filename,
 269                         struct ccw_device_id *id, char *alias)
 270 {
 271         id->match_flags = TO_NATIVE(id->match_flags);
 272         id->cu_type = TO_NATIVE(id->cu_type);
 273         id->cu_model = TO_NATIVE(id->cu_model);
 274         id->dev_type = TO_NATIVE(id->dev_type);
 275         id->dev_model = TO_NATIVE(id->dev_model);
 276
 277         strcpy(alias, "ccw:");
 278         ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
 279             id->cu_type);
 280         ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
 281             id->cu_model);
 282         ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
 283             id->dev_type);
 284         ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
 285             id->dev_model);
 286         return 1;
 287 }
 288
 289 /* looks like: "ap:tN" */
 290 static int do_ap_entry(const char *filename,
 291                        struct ap_device_id *id, char *alias)
 292 {
 293         sprintf(alias, "ap:t%02X", id->dev_type);
 294         return 1;
 295 }
 296
 297 /* Looks like: "serio:tyNprNidNexN" */
 298 static int do_serio_entry(const char *filename,
 299                           struct serio_device_id *id, char *alias)
 300 {
 301         id->type = TO_NATIVE(id->type);
 302         id->proto = TO_NATIVE(id->proto);
 303         id->id = TO_NATIVE(id->id);
 304         id->extra = TO_NATIVE(id->extra);
 305
 306         strcpy(alias, "serio:");
 307         ADD(alias, "ty", id->type != SERIO_ANY, id->type);
 308         ADD(alias, "pr", id->proto != SERIO_ANY, id->proto);
 309         ADD(alias, "id", id->id != SERIO_ANY, id->id);
 310         ADD(alias, "ex", id->extra != SERIO_ANY, id->extra);
 311
 312         return 1;
 313 }
 314
 315 /* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
 316 static int do_acpi_entry(const char *filename,
 317                         struct acpi_device_id *id, char *alias)
 318 {
 319         sprintf(alias, "acpi*:%s:", id->id);
 320         return 1;
 321 }
 322
 323 /* looks like: "pnp:dD" */
 324 static int do_pnp_entry(const char *filename,
 325                         struct pnp_device_id *id, char *alias)
 326 {
 327         sprintf(alias, "pnp:d%s", id->id);
 328         return 1;
 329 }
 330
 331 /* looks like: "pnp:cCdD..." */
 332 static int do_pnp_card_entry(const char *filename,
 333                         struct pnp_card_device_id *id, char *alias)
 334 {
 335         int i;
 336
 337         sprintf(alias, "pnp:c%s", id->id);
 338         for (i = 0; i < PNP_MAX_DEVICES; i++) {
 339                 if (! *id->devs[i].id)
 340                         break;
 341                 sprintf(alias + strlen(alias), "d%s", id->devs[i].id);
 342         }
 343         return 1;
 344 }
 345
 346 /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
 347 static int do_pcmcia_entry(const char *filename,
 348                            struct pcmcia_device_id *id, char *alias)
 349 {
 350         unsigned int i;
 351
 352         id->match_flags = TO_NATIVE(id->match_flags);
 353         id->manf_id = TO_NATIVE(id->manf_id);
 354         id->card_id = TO_NATIVE(id->card_id);
 355         id->func_id = TO_NATIVE(id->func_id);
 356         id->function = TO_NATIVE(id->function);
 357         id->device_no = TO_NATIVE(id->device_no);
 358
 359         for (i=0; i<4; i++) {
 360                 id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]);
 361        }
 362
 363        strcpy(alias, "pcmcia:");
 364        ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
 365            id->manf_id);
 366        ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
 367            id->card_id);
 368        ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
 369            id->func_id);
 370        ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
 371            id->function);
 372        ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
 373            id->device_no);
 374        ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]);
 375        ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]);
 376        ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]);
 377        ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]);
 378
 379        return 1;
 380 }
 381
 382
 383
 384 static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
 385 {
 386     int len;
 387     char *tmp;
 388     len = sprintf (alias, "of:N%sT%s",
 389                     of->name[0] ? of->name : "*",
 390                     of->type[0] ? of->type : "*");
 391
 392     if (of->compatible[0])
 393         sprintf (&alias[len], "%sC%s",
 394                      of->type[0] ? "*" : "",
 395                      of->compatible);
 396
 397     /* Replace all whitespace with underscores */
 398     for (tmp = alias; tmp && *tmp; tmp++)
 399         if (isspace (*tmp))
 400             *tmp = '_';
 401
 402     return 1;
 403 }
 404
 405 static int do_vio_entry(const char *filename, struct vio_device_id *vio,
 406                 char *alias)
 407 {
 408         char *tmp;
 409
 410         sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*",
 411                         vio->compat[0] ? vio->compat : "*");
 412
 413         /* Replace all whitespace with underscores */
 414         for (tmp = alias; tmp && *tmp; tmp++)
 415                 if (isspace (*tmp))
 416                         *tmp = '_';
 417
 418         return 1;
 419 }
 420
 421 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 422
 423 static void do_input(char *alias,
 424                      kernel_ulong_t *arr, unsigned int min, unsigned int max)
 425 {
 426         unsigned int i;
 427
 428         for (i = min; i < max; i++)
 429                 if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
 430                         sprintf(alias + strlen(alias), "%X,*", i);
 431 }
 432
 433 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
 434 static int do_input_entry(const char *filename, struct input_device_id *id,
 435                           char *alias)
 436 {
 437         sprintf(alias, "input:");
 438
 439         ADD(alias, "b", id->flags & INPUT_DEVICE_ID_MATCH_BUS, id->bustype);
 440         ADD(alias, "v", id->flags & INPUT_DEVICE_ID_MATCH_VENDOR, id->vendor);
 441         ADD(alias, "p", id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT, id->product);
 442         ADD(alias, "e", id->flags & INPUT_DEVICE_ID_MATCH_VERSION, id->version);
 443
 444         sprintf(alias + strlen(alias), "-e*");
 445         if (id->flags & INPUT_DEVICE_ID_MATCH_EVBIT)
 446                 do_input(alias, id->evbit, 0, INPUT_DEVICE_ID_EV_MAX);
 447         sprintf(alias + strlen(alias), "k*");
 448         if (id->flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
 449                 do_input(alias, id->keybit,
 450                          INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
 451                          INPUT_DEVICE_ID_KEY_MAX);
 452         sprintf(alias + strlen(alias), "r*");
 453         if (id->flags & INPUT_DEVICE_ID_MATCH_RELBIT)
 454                 do_input(alias, id->relbit, 0, INPUT_DEVICE_ID_REL_MAX);
 455         sprintf(alias + strlen(alias), "a*");
 456         if (id->flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
 457                 do_input(alias, id->absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
 458         sprintf(alias + strlen(alias), "m*");
 459         if (id->flags & INPUT_DEVICE_ID_MATCH_MSCIT)
 460                 do_input(alias, id->mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
 461         sprintf(alias + strlen(alias), "l*");
 462         if (id->flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
 463                 do_input(alias, id->ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
 464         sprintf(alias + strlen(alias), "s*");
 465         if (id->flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
 466                 do_input(alias, id->sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
 467         sprintf(alias + strlen(alias), "f*");
 468         if (id->flags & INPUT_DEVICE_ID_MATCH_FFBIT)
 469                 do_input(alias, id->ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
 470         sprintf(alias + strlen(alias), "w*");
 471         if (id->flags & INPUT_DEVICE_ID_MATCH_SWBIT)
 472                 do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX);
 473         return 1;
 474 }
 475
 476 static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa,
 477                 char *alias)
 478 {
 479         if (eisa->sig[0])
 480                 sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", eisa->sig);
 481         return 1;
 482 }
 483
 484 /* Looks like: parisc:tNhvNrevNsvN */
 485 static int do_parisc_entry(const char *filename, struct parisc_device_id *id,
 486                 char *alias)
 487 {
 488         id->hw_type = TO_NATIVE(id->hw_type);
 489         id->hversion = TO_NATIVE(id->hversion);
 490         id->hversion_rev = TO_NATIVE(id->hversion_rev);
 491         id->sversion = TO_NATIVE(id->sversion);
 492
 493         strcpy(alias, "parisc:");
 494         ADD(alias, "t", id->hw_type != PA_HWTYPE_ANY_ID, id->hw_type);
 495         ADD(alias, "hv", id->hversion != PA_HVERSION_ANY_ID, id->hversion);
 496         ADD(alias, "rev", id->hversion_rev != PA_HVERSION_REV_ANY_ID, id->hversion_rev);
 497         ADD(alias, "sv", id->sversion != PA_SVERSION_ANY_ID, id->sversion);
 498
 499         return 1;
 500 }
 501
 502 /* Looks like: sdio:cNvNdN. */
 503 static int do_sdio_entry(const char *filename,
 504                         struct sdio_device_id *id, char *alias)
 505 {
 506         id->class = TO_NATIVE(id->class);
 507         id->vendor = TO_NATIVE(id->vendor);
 508         id->device = TO_NATIVE(id->device);
 509
 510         strcpy(alias, "sdio:");
 511         ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class);
 512         ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor);
 513         ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device);
 514         return 1;
 515 }
 516
 517 /* Looks like: ssb:vNidNrevN. */
 518 static int do_ssb_entry(const char *filename,
 519                         struct ssb_device_id *id, char *alias)
 520 {
 521         id->vendor = TO_NATIVE(id->vendor);
 522         id->coreid = TO_NATIVE(id->coreid);
 523         id->revision = TO_NATIVE(id->revision);
 524
 525         strcpy(alias, "ssb:");
 526         ADD(alias, "v", id->vendor != SSB_ANY_VENDOR, id->vendor);
 527         ADD(alias, "id", id->coreid != SSB_ANY_ID, id->coreid);
 528         ADD(alias, "rev", id->revision != SSB_ANY_REV, id->revision);
 529         return 1;
 530 }
 531
 532 /* Looks like: virtio:dNvN */
 533 static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
 534                            char *alias)
 535 {
 536         id->device = TO_NATIVE(id->device);
 537         id->vendor = TO_NATIVE(id->vendor);
 538
 539         strcpy(alias, "virtio:");
 540         ADD(alias, "d", 1, id->device);
 541         ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor);
 542
 543         return 1;
 544 }
 545
 546 /* Ignore any prefix, eg. v850 prepends _ */
 547 static inline int sym_is(const char *symbol, const char *name)
 548 {
 549         const char *match;
 550
 551         match = strstr(symbol, name);
 552         if (!match)
 553                 return 0;
 554         return match[strlen(symbol)] == '\0';
 555 }
 556
 557 static void do_table(void *symval, unsigned long size,
 558                      unsigned long id_size,
 559                      const char *device_id,
 560                      void *function,
 561                      struct module *mod)
 562 {
 563         unsigned int i;
 564         char alias[500];
 565         int (*do_entry)(const char *, void *entry, char *alias) = function;
 566
 567         device_id_check(mod->name, device_id, size, id_size, symval);
 568         /* Leave last one: it's the terminator. */
 569         size -= id_size;
 570
 571         for (i = 0; i < size; i += id_size) {
 572                 if (do_entry(mod->name, symval+i, alias)) {
 573                         /* Always end in a wildcard, for future extension */
 574                         if (alias[strlen(alias)-1] != '*')
 575                                 strcat(alias, "*");
 576                         buf_printf(&mod->dev_table_buf,
 577                                    "MODULE_ALIAS(\"%s\");\n", alias);
 578                 }
 579         }
 580 }
 581
 582 /* Create MODULE_ALIAS() statements.
 583  * At this time, we cannot write the actual output C source yet,
 584  * so we write into the mod->dev_table_buf buffer. */
 585 void handle_moddevtable(struct module *mod, struct elf_info *info,
 586                         Elf_Sym *sym, const char *symname)
 587 {
 588         void *symval;
 589         char *zeros = NULL;
 590
 591         /* We're looking for a section relative symbol */
 592         if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum)
 593                 return;
 594
 595         /* Handle all-NULL symbols allocated into .bss */
 596         if (info->sechdrs[sym->st_shndx].sh_type & SHT_NOBITS) {
 597                 zeros = calloc(1, sym->st_size);
 598                 symval = zeros;
 599         } else {
 600                 symval = (void *)info->hdr
 601                         + info->sechdrs[sym->st_shndx].sh_offset
 602                         + sym->st_value;
 603         }
 604
 605         if (sym_is(symname, "__mod_pci_device_table"))
 606                 do_table(symval, sym->st_size,
 607                          sizeof(struct pci_device_id), "pci",
 608                          do_pci_entry, mod);
 609         else if (sym_is(symname, "__mod_usb_device_table"))
 610                 /* special case to handle bcdDevice ranges */
 611                 do_usb_table(symval, sym->st_size, mod);
 612         else if (sym_is(symname, "__mod_ieee1394_device_table"))
 613                 do_table(symval, sym->st_size,
 614                          sizeof(struct ieee1394_device_id), "ieee1394",
 615                          do_ieee1394_entry, mod);
 616         else if (sym_is(symname, "__mod_ccw_device_table"))
 617                 do_table(symval, sym->st_size,
 618                          sizeof(struct ccw_device_id), "ccw",
 619                          do_ccw_entry, mod);
 620         else if (sym_is(symname, "__mod_ap_device_table"))
 621                 do_table(symval, sym->st_size,
 622                          sizeof(struct ap_device_id), "ap",
 623                          do_ap_entry, mod);
 624         else if (sym_is(symname, "__mod_serio_device_table"))
 625                 do_table(symval, sym->st_size,
 626                          sizeof(struct serio_device_id), "serio",
 627                          do_serio_entry, mod);
 628         else if (sym_is(symname, "__mod_acpi_device_table"))
 629                 do_table(symval, sym->st_size,
 630                          sizeof(struct acpi_device_id), "acpi",
 631                          do_acpi_entry, mod);
 632         else if (sym_is(symname, "__mod_pnp_device_table"))
 633                 do_table(symval, sym->st_size,
 634                          sizeof(struct pnp_device_id), "pnp",
 635                          do_pnp_entry, mod);
 636         else if (sym_is(symname, "__mod_pnp_card_device_table"))
 637                 do_table(symval, sym->st_size,
 638                          sizeof(struct pnp_card_device_id), "pnp_card",
 639                          do_pnp_card_entry, mod);
 640         else if (sym_is(symname, "__mod_pcmcia_device_table"))
 641                 do_table(symval, sym->st_size,
 642                          sizeof(struct pcmcia_device_id), "pcmcia",
 643                          do_pcmcia_entry, mod);
 644         else if (sym_is(symname, "__mod_of_device_table"))
 645                 do_table(symval, sym->st_size,
 646                          sizeof(struct of_device_id), "of",
 647                          do_of_entry, mod);
 648         else if (sym_is(symname, "__mod_vio_device_table"))
 649                 do_table(symval, sym->st_size,
 650                          sizeof(struct vio_device_id), "vio",
 651                          do_vio_entry, mod);
 652         else if (sym_is(symname, "__mod_input_device_table"))
 653                 do_table(symval, sym->st_size,
 654                          sizeof(struct input_device_id), "input",
 655                          do_input_entry, mod);
 656         else if (sym_is(symname, "__mod_eisa_device_table"))
 657                 do_table(symval, sym->st_size,
 658                          sizeof(struct eisa_device_id), "eisa",
 659                          do_eisa_entry, mod);
 660         else if (sym_is(symname, "__mod_parisc_device_table"))
 661                 do_table(symval, sym->st_size,
 662                          sizeof(struct parisc_device_id), "parisc",
 663                          do_parisc_entry, mod);
 664         else if (sym_is(symname, "__mod_sdio_device_table"))
 665                 do_table(symval, sym->st_size,
 666                          sizeof(struct sdio_device_id), "sdio",
 667                          do_sdio_entry, mod);
 668         else if (sym_is(symname, "__mod_ssb_device_table"))
 669                 do_table(symval, sym->st_size,
 670                          sizeof(struct ssb_device_id), "ssb",
 671                          do_ssb_entry, mod);
 672         else if (sym_is(symname, "__mod_virtio_device_table"))
 673                 do_table(symval, sym->st_size,
 674                          sizeof(struct virtio_device_id), "virtio",
 675                          do_virtio_entry, mod);
 676         free(zeros);
 677 }
 678
 679 /* Now add out buffered information to the generated C source */
 680 void add_moddevtable(struct buffer *buf, struct module *mod)
 681 {
 682         buf_printf(buf, "\n");
 683         buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
 684         free(mod->dev_table_buf.p);
 685 }