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