linux/scripts/mod/file2alias.c
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   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
  18typedef Elf32_Addr      kernel_ulong_t;
  19#define BITS_PER_LONG 32
  20#else
  21typedef 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
  32typedef uint32_t        __u32;
  33typedef uint16_t        __u16;
  34typedef 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)                              \
  42do {                                                            \
  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 */
  55static inline void add_wildcard(char *str)
  56{
  57        int len = strlen(str);
  58
  59        if (str[len - 1] != '*')
  60                strcat(str + len, "*");
  61}
  62
  63unsigned 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 **/
  71static 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" */
 104static 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
 150static 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
 194static void do_usb_table(void *symval, unsigned long size,
 195                         struct module *mod)
 196{
 197        unsigned int i;
 198        const unsigned long id_size = sizeof(struct usb_device_id);
 199
 200        device_id_check(mod->name, "usb", size, id_size, symval);
 201
 202        /* Leave last one: it's the terminator. */
 203        size -= id_size;
 204
 205        for (i = 0; i < size; i += id_size)
 206                do_usb_entry_multi(symval + i, mod);
 207}
 208
 209/* Looks like: hid:bNvNpN */
 210static int do_hid_entry(const char *filename,
 211                             struct hid_device_id *id, char *alias)
 212{
 213        id->bus = TO_NATIVE(id->bus);
 214        id->vendor = TO_NATIVE(id->vendor);
 215        id->product = TO_NATIVE(id->product);
 216
 217        sprintf(alias, "hid:b%04X", id->bus);
 218        ADD(alias, "v", id->vendor != HID_ANY_ID, id->vendor);
 219        ADD(alias, "p", id->product != HID_ANY_ID, id->product);
 220
 221        return 1;
 222}
 223
 224/* Looks like: ieee1394:venNmoNspNverN */
 225static int do_ieee1394_entry(const char *filename,
 226                             struct ieee1394_device_id *id, char *alias)
 227{
 228        id->match_flags = TO_NATIVE(id->match_flags);
 229        id->vendor_id = TO_NATIVE(id->vendor_id);
 230        id->model_id = TO_NATIVE(id->model_id);
 231        id->specifier_id = TO_NATIVE(id->specifier_id);
 232        id->version = TO_NATIVE(id->version);
 233
 234        strcpy(alias, "ieee1394:");
 235        ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID,
 236            id->vendor_id);
 237        ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID,
 238            id->model_id);
 239        ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID,
 240            id->specifier_id);
 241        ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION,
 242            id->version);
 243
 244        add_wildcard(alias);
 245        return 1;
 246}
 247
 248/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
 249static int do_pci_entry(const char *filename,
 250                        struct pci_device_id *id, char *alias)
 251{
 252        /* Class field can be divided into these three. */
 253        unsigned char baseclass, subclass, interface,
 254                baseclass_mask, subclass_mask, interface_mask;
 255
 256        id->vendor = TO_NATIVE(id->vendor);
 257        id->device = TO_NATIVE(id->device);
 258        id->subvendor = TO_NATIVE(id->subvendor);
 259        id->subdevice = TO_NATIVE(id->subdevice);
 260        id->class = TO_NATIVE(id->class);
 261        id->class_mask = TO_NATIVE(id->class_mask);
 262
 263        strcpy(alias, "pci:");
 264        ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor);
 265        ADD(alias, "d", id->device != PCI_ANY_ID, id->device);
 266        ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor);
 267        ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice);
 268
 269        baseclass = (id->class) >> 16;
 270        baseclass_mask = (id->class_mask) >> 16;
 271        subclass = (id->class) >> 8;
 272        subclass_mask = (id->class_mask) >> 8;
 273        interface = id->class;
 274        interface_mask = id->class_mask;
 275
 276        if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
 277            || (subclass_mask != 0 && subclass_mask != 0xFF)
 278            || (interface_mask != 0 && interface_mask != 0xFF)) {
 279                warn("Can't handle masks in %s:%04X\n",
 280                     filename, id->class_mask);
 281                return 0;
 282        }
 283
 284        ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
 285        ADD(alias, "sc", subclass_mask == 0xFF, subclass);
 286        ADD(alias, "i", interface_mask == 0xFF, interface);
 287        add_wildcard(alias);
 288        return 1;
 289}
 290
 291/* looks like: "ccw:tNmNdtNdmN" */
 292static int do_ccw_entry(const char *filename,
 293                        struct ccw_device_id *id, char *alias)
 294{
 295        id->match_flags = TO_NATIVE(id->match_flags);
 296        id->cu_type = TO_NATIVE(id->cu_type);
 297        id->cu_model = TO_NATIVE(id->cu_model);
 298        id->dev_type = TO_NATIVE(id->dev_type);
 299        id->dev_model = TO_NATIVE(id->dev_model);
 300
 301        strcpy(alias, "ccw:");
 302        ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
 303            id->cu_type);
 304        ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
 305            id->cu_model);
 306        ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
 307            id->dev_type);
 308        ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
 309            id->dev_model);
 310        add_wildcard(alias);
 311        return 1;
 312}
 313
 314/* looks like: "ap:tN" */
 315static int do_ap_entry(const char *filename,
 316                       struct ap_device_id *id, char *alias)
 317{
 318        sprintf(alias, "ap:t%02X*", id->dev_type);
 319        return 1;
 320}
 321
 322/* looks like: "css:tN" */
 323static int do_css_entry(const char *filename,
 324                        struct css_device_id *id, char *alias)
 325{
 326        sprintf(alias, "css:t%01X", id->type);
 327        return 1;
 328}
 329
 330/* Looks like: "serio:tyNprNidNexN" */
 331static int do_serio_entry(const char *filename,
 332                          struct serio_device_id *id, char *alias)
 333{
 334        id->type = TO_NATIVE(id->type);
 335        id->proto = TO_NATIVE(id->proto);
 336        id->id = TO_NATIVE(id->id);
 337        id->extra = TO_NATIVE(id->extra);
 338
 339        strcpy(alias, "serio:");
 340        ADD(alias, "ty", id->type != SERIO_ANY, id->type);
 341        ADD(alias, "pr", id->proto != SERIO_ANY, id->proto);
 342        ADD(alias, "id", id->id != SERIO_ANY, id->id);
 343        ADD(alias, "ex", id->extra != SERIO_ANY, id->extra);
 344
 345        add_wildcard(alias);
 346        return 1;
 347}
 348
 349/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
 350static int do_acpi_entry(const char *filename,
 351                        struct acpi_device_id *id, char *alias)
 352{
 353        sprintf(alias, "acpi*:%s:*", id->id);
 354        return 1;
 355}
 356
 357/* looks like: "pnp:dD" */
 358static void do_pnp_device_entry(void *symval, unsigned long size,
 359                                struct module *mod)
 360{
 361        const unsigned long id_size = sizeof(struct pnp_device_id);
 362        const unsigned int count = (size / id_size)-1;
 363        const struct pnp_device_id *devs = symval;
 364        unsigned int i;
 365
 366        device_id_check(mod->name, "pnp", size, id_size, symval);
 367
 368        for (i = 0; i < count; i++) {
 369                const char *id = (char *)devs[i].id;
 370                char acpi_id[sizeof(devs[0].id)];
 371                int j;
 372
 373                buf_printf(&mod->dev_table_buf,
 374                           "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 375
 376                /* fix broken pnp bus lowercasing */
 377                for (j = 0; j < sizeof(acpi_id); j++)
 378                        acpi_id[j] = toupper(id[j]);
 379                buf_printf(&mod->dev_table_buf,
 380                           "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 381        }
 382}
 383
 384/* looks like: "pnp:dD" for every device of the card */
 385static void do_pnp_card_entries(void *symval, unsigned long size,
 386                                struct module *mod)
 387{
 388        const unsigned long id_size = sizeof(struct pnp_card_device_id);
 389        const unsigned int count = (size / id_size)-1;
 390        const struct pnp_card_device_id *cards = symval;
 391        unsigned int i;
 392
 393        device_id_check(mod->name, "pnp", size, id_size, symval);
 394
 395        for (i = 0; i < count; i++) {
 396                unsigned int j;
 397                const struct pnp_card_device_id *card = &cards[i];
 398
 399                for (j = 0; j < PNP_MAX_DEVICES; j++) {
 400                        const char *id = (char *)card->devs[j].id;
 401                        int i2, j2;
 402                        int dup = 0;
 403
 404                        if (!id[0])
 405                                break;
 406
 407                        /* find duplicate, already added value */
 408                        for (i2 = 0; i2 < i && !dup; i2++) {
 409                                const struct pnp_card_device_id *card2 = &cards[i2];
 410
 411                                for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
 412                                        const char *id2 = (char *)card2->devs[j2].id;
 413
 414                                        if (!id2[0])
 415                                                break;
 416
 417                                        if (!strcmp(id, id2)) {
 418                                                dup = 1;
 419                                                break;
 420                                        }
 421                                }
 422                        }
 423
 424                        /* add an individual alias for every device entry */
 425                        if (!dup) {
 426                                char acpi_id[sizeof(card->devs[0].id)];
 427                                int k;
 428
 429                                buf_printf(&mod->dev_table_buf,
 430                                           "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 431
 432                                /* fix broken pnp bus lowercasing */
 433                                for (k = 0; k < sizeof(acpi_id); k++)
 434                                        acpi_id[k] = toupper(id[k]);
 435                                buf_printf(&mod->dev_table_buf,
 436                                           "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 437                        }
 438                }
 439        }
 440}
 441
 442/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
 443static int do_pcmcia_entry(const char *filename,
 444                           struct pcmcia_device_id *id, char *alias)
 445{
 446        unsigned int i;
 447
 448        id->match_flags = TO_NATIVE(id->match_flags);
 449        id->manf_id = TO_NATIVE(id->manf_id);
 450        id->card_id = TO_NATIVE(id->card_id);
 451        id->func_id = TO_NATIVE(id->func_id);
 452        id->function = TO_NATIVE(id->function);
 453        id->device_no = TO_NATIVE(id->device_no);
 454
 455        for (i=0; i<4; i++) {
 456                id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]);
 457       }
 458
 459       strcpy(alias, "pcmcia:");
 460       ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
 461           id->manf_id);
 462       ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
 463           id->card_id);
 464       ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
 465           id->func_id);
 466       ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
 467           id->function);
 468       ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
 469           id->device_no);
 470       ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]);
 471       ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]);
 472       ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]);
 473       ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]);
 474
 475        add_wildcard(alias);
 476       return 1;
 477}
 478
 479
 480
 481static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
 482{
 483    int len;
 484    char *tmp;
 485    len = sprintf (alias, "of:N%sT%s",
 486                    of->name[0] ? of->name : "*",
 487                    of->type[0] ? of->type : "*");
 488
 489    if (of->compatible[0])
 490        sprintf (&alias[len], "%sC%s",
 491                     of->type[0] ? "*" : "",
 492                     of->compatible);
 493
 494    /* Replace all whitespace with underscores */
 495    for (tmp = alias; tmp && *tmp; tmp++)
 496        if (isspace (*tmp))
 497            *tmp = '_';
 498
 499    add_wildcard(alias);
 500    return 1;
 501}
 502
 503static int do_vio_entry(const char *filename, struct vio_device_id *vio,
 504                char *alias)
 505{
 506        char *tmp;
 507
 508        sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*",
 509                        vio->compat[0] ? vio->compat : "*");
 510
 511        /* Replace all whitespace with underscores */
 512        for (tmp = alias; tmp && *tmp; tmp++)
 513                if (isspace (*tmp))
 514                        *tmp = '_';
 515
 516        add_wildcard(alias);
 517        return 1;
 518}
 519
 520#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 521
 522static void do_input(char *alias,
 523                     kernel_ulong_t *arr, unsigned int min, unsigned int max)
 524{
 525        unsigned int i;
 526
 527        for (i = min; i < max; i++)
 528                if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
 529                        sprintf(alias + strlen(alias), "%X,*", i);
 530}
 531
 532/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
 533static int do_input_entry(const char *filename, struct input_device_id *id,
 534                          char *alias)
 535{
 536        sprintf(alias, "input:");
 537
 538        ADD(alias, "b", id->flags & INPUT_DEVICE_ID_MATCH_BUS, id->bustype);
 539        ADD(alias, "v", id->flags & INPUT_DEVICE_ID_MATCH_VENDOR, id->vendor);
 540        ADD(alias, "p", id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT, id->product);
 541        ADD(alias, "e", id->flags & INPUT_DEVICE_ID_MATCH_VERSION, id->version);
 542
 543        sprintf(alias + strlen(alias), "-e*");
 544        if (id->flags & INPUT_DEVICE_ID_MATCH_EVBIT)
 545                do_input(alias, id->evbit, 0, INPUT_DEVICE_ID_EV_MAX);
 546        sprintf(alias + strlen(alias), "k*");
 547        if (id->flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
 548                do_input(alias, id->keybit,
 549                         INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
 550                         INPUT_DEVICE_ID_KEY_MAX);
 551        sprintf(alias + strlen(alias), "r*");
 552        if (id->flags & INPUT_DEVICE_ID_MATCH_RELBIT)
 553                do_input(alias, id->relbit, 0, INPUT_DEVICE_ID_REL_MAX);
 554        sprintf(alias + strlen(alias), "a*");
 555        if (id->flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
 556                do_input(alias, id->absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
 557        sprintf(alias + strlen(alias), "m*");
 558        if (id->flags & INPUT_DEVICE_ID_MATCH_MSCIT)
 559                do_input(alias, id->mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
 560        sprintf(alias + strlen(alias), "l*");
 561        if (id->flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
 562                do_input(alias, id->ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
 563        sprintf(alias + strlen(alias), "s*");
 564        if (id->flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
 565                do_input(alias, id->sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
 566        sprintf(alias + strlen(alias), "f*");
 567        if (id->flags & INPUT_DEVICE_ID_MATCH_FFBIT)
 568                do_input(alias, id->ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
 569        sprintf(alias + strlen(alias), "w*");
 570        if (id->flags & INPUT_DEVICE_ID_MATCH_SWBIT)
 571                do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX);
 572        return 1;
 573}
 574
 575static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa,
 576                char *alias)
 577{
 578        if (eisa->sig[0])
 579                sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", eisa->sig);
 580        else
 581                strcat(alias, "*");
 582        return 1;
 583}
 584
 585/* Looks like: parisc:tNhvNrevNsvN */
 586static int do_parisc_entry(const char *filename, struct parisc_device_id *id,
 587                char *alias)
 588{
 589        id->hw_type = TO_NATIVE(id->hw_type);
 590        id->hversion = TO_NATIVE(id->hversion);
 591        id->hversion_rev = TO_NATIVE(id->hversion_rev);
 592        id->sversion = TO_NATIVE(id->sversion);
 593
 594        strcpy(alias, "parisc:");
 595        ADD(alias, "t", id->hw_type != PA_HWTYPE_ANY_ID, id->hw_type);
 596        ADD(alias, "hv", id->hversion != PA_HVERSION_ANY_ID, id->hversion);
 597        ADD(alias, "rev", id->hversion_rev != PA_HVERSION_REV_ANY_ID, id->hversion_rev);
 598        ADD(alias, "sv", id->sversion != PA_SVERSION_ANY_ID, id->sversion);
 599
 600        add_wildcard(alias);
 601        return 1;
 602}
 603
 604/* Looks like: sdio:cNvNdN. */
 605static int do_sdio_entry(const char *filename,
 606                        struct sdio_device_id *id, char *alias)
 607{
 608        id->class = TO_NATIVE(id->class);
 609        id->vendor = TO_NATIVE(id->vendor);
 610        id->device = TO_NATIVE(id->device);
 611
 612        strcpy(alias, "sdio:");
 613        ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class);
 614        ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor);
 615        ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device);
 616        add_wildcard(alias);
 617        return 1;
 618}
 619
 620/* Looks like: ssb:vNidNrevN. */
 621static int do_ssb_entry(const char *filename,
 622                        struct ssb_device_id *id, char *alias)
 623{
 624        id->vendor = TO_NATIVE(id->vendor);
 625        id->coreid = TO_NATIVE(id->coreid);
 626        id->revision = TO_NATIVE(id->revision);
 627
 628        strcpy(alias, "ssb:");
 629        ADD(alias, "v", id->vendor != SSB_ANY_VENDOR, id->vendor);
 630        ADD(alias, "id", id->coreid != SSB_ANY_ID, id->coreid);
 631        ADD(alias, "rev", id->revision != SSB_ANY_REV, id->revision);
 632        add_wildcard(alias);
 633        return 1;
 634}
 635
 636/* Looks like: virtio:dNvN */
 637static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
 638                           char *alias)
 639{
 640        id->device = TO_NATIVE(id->device);
 641        id->vendor = TO_NATIVE(id->vendor);
 642
 643        strcpy(alias, "virtio:");
 644        ADD(alias, "d", id->device != VIRTIO_DEV_ANY_ID, id->device);
 645        ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor);
 646
 647        add_wildcard(alias);
 648        return 1;
 649}
 650
 651/* Looks like: i2c:S */
 652static int do_i2c_entry(const char *filename, struct i2c_device_id *id,
 653                        char *alias)
 654{
 655        sprintf(alias, I2C_MODULE_PREFIX "%s", id->name);
 656
 657        return 1;
 658}
 659
 660/* Looks like: spi:S */
 661static int do_spi_entry(const char *filename, struct spi_device_id *id,
 662                        char *alias)
 663{
 664        sprintf(alias, SPI_MODULE_PREFIX "%s", id->name);
 665
 666        return 1;
 667}
 668
 669static const struct dmifield {
 670        const char *prefix;
 671        int field;
 672} dmi_fields[] = {
 673        { "bvn", DMI_BIOS_VENDOR },
 674        { "bvr", DMI_BIOS_VERSION },
 675        { "bd",  DMI_BIOS_DATE },
 676        { "svn", DMI_SYS_VENDOR },
 677        { "pn",  DMI_PRODUCT_NAME },
 678        { "pvr", DMI_PRODUCT_VERSION },
 679        { "rvn", DMI_BOARD_VENDOR },
 680        { "rn",  DMI_BOARD_NAME },
 681        { "rvr", DMI_BOARD_VERSION },
 682        { "cvn", DMI_CHASSIS_VENDOR },
 683        { "ct",  DMI_CHASSIS_TYPE },
 684        { "cvr", DMI_CHASSIS_VERSION },
 685        { NULL,  DMI_NONE }
 686};
 687
 688static void dmi_ascii_filter(char *d, const char *s)
 689{
 690        /* Filter out characters we don't want to see in the modalias string */
 691        for (; *s; s++)
 692                if (*s > ' ' && *s < 127 && *s != ':')
 693                        *(d++) = *s;
 694
 695        *d = 0;
 696}
 697
 698
 699static int do_dmi_entry(const char *filename, struct dmi_system_id *id,
 700                        char *alias)
 701{
 702        int i, j;
 703
 704        sprintf(alias, "dmi*");
 705
 706        for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
 707                for (j = 0; j < 4; j++) {
 708                        if (id->matches[j].slot &&
 709                            id->matches[j].slot == dmi_fields[i].field) {
 710                                sprintf(alias + strlen(alias), ":%s*",
 711                                        dmi_fields[i].prefix);
 712                                dmi_ascii_filter(alias + strlen(alias),
 713                                                 id->matches[j].substr);
 714                                strcat(alias, "*");
 715                        }
 716                }
 717        }
 718
 719        strcat(alias, ":");
 720        return 1;
 721}
 722
 723static int do_platform_entry(const char *filename,
 724                             struct platform_device_id *id, char *alias)
 725{
 726        sprintf(alias, PLATFORM_MODULE_PREFIX "%s", id->name);
 727        return 1;
 728}
 729
 730/* Ignore any prefix, eg. some architectures prepend _ */
 731static inline int sym_is(const char *symbol, const char *name)
 732{
 733        const char *match;
 734
 735        match = strstr(symbol, name);
 736        if (!match)
 737                return 0;
 738        return match[strlen(symbol)] == '\0';
 739}
 740
 741static void do_table(void *symval, unsigned long size,
 742                     unsigned long id_size,
 743                     const char *device_id,
 744                     void *function,
 745                     struct module *mod)
 746{
 747        unsigned int i;
 748        char alias[500];
 749        int (*do_entry)(const char *, void *entry, char *alias) = function;
 750
 751        device_id_check(mod->name, device_id, size, id_size, symval);
 752        /* Leave last one: it's the terminator. */
 753        size -= id_size;
 754
 755        for (i = 0; i < size; i += id_size) {
 756                if (do_entry(mod->name, symval+i, alias)) {
 757                        buf_printf(&mod->dev_table_buf,
 758                                   "MODULE_ALIAS(\"%s\");\n", alias);
 759                }
 760        }
 761}
 762
 763/* Create MODULE_ALIAS() statements.
 764 * At this time, we cannot write the actual output C source yet,
 765 * so we write into the mod->dev_table_buf buffer. */
 766void handle_moddevtable(struct module *mod, struct elf_info *info,
 767                        Elf_Sym *sym, const char *symname)
 768{
 769        void *symval;
 770        char *zeros = NULL;
 771
 772        /* We're looking for a section relative symbol */
 773        if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum)
 774                return;
 775
 776        /* Handle all-NULL symbols allocated into .bss */
 777        if (info->sechdrs[sym->st_shndx].sh_type & SHT_NOBITS) {
 778                zeros = calloc(1, sym->st_size);
 779                symval = zeros;
 780        } else {
 781                symval = (void *)info->hdr
 782                        + info->sechdrs[sym->st_shndx].sh_offset
 783                        + sym->st_value;
 784        }
 785
 786        if (sym_is(symname, "__mod_pci_device_table"))
 787                do_table(symval, sym->st_size,
 788                         sizeof(struct pci_device_id), "pci",
 789                         do_pci_entry, mod);
 790        else if (sym_is(symname, "__mod_usb_device_table"))
 791                /* special case to handle bcdDevice ranges */
 792                do_usb_table(symval, sym->st_size, mod);
 793        else if (sym_is(symname, "__mod_hid_device_table"))
 794                do_table(symval, sym->st_size,
 795                         sizeof(struct hid_device_id), "hid",
 796                         do_hid_entry, mod);
 797        else if (sym_is(symname, "__mod_ieee1394_device_table"))
 798                do_table(symval, sym->st_size,
 799                         sizeof(struct ieee1394_device_id), "ieee1394",
 800                         do_ieee1394_entry, mod);
 801        else if (sym_is(symname, "__mod_ccw_device_table"))
 802                do_table(symval, sym->st_size,
 803                         sizeof(struct ccw_device_id), "ccw",
 804                         do_ccw_entry, mod);
 805        else if (sym_is(symname, "__mod_ap_device_table"))
 806                do_table(symval, sym->st_size,
 807                         sizeof(struct ap_device_id), "ap",
 808                         do_ap_entry, mod);
 809        else if (sym_is(symname, "__mod_css_device_table"))
 810                do_table(symval, sym->st_size,
 811                         sizeof(struct css_device_id), "css",
 812                         do_css_entry, mod);
 813        else if (sym_is(symname, "__mod_serio_device_table"))
 814                do_table(symval, sym->st_size,
 815                         sizeof(struct serio_device_id), "serio",
 816                         do_serio_entry, mod);
 817        else if (sym_is(symname, "__mod_acpi_device_table"))
 818                do_table(symval, sym->st_size,
 819                         sizeof(struct acpi_device_id), "acpi",
 820                         do_acpi_entry, mod);
 821        else if (sym_is(symname, "__mod_pnp_device_table"))
 822                do_pnp_device_entry(symval, sym->st_size, mod);
 823        else if (sym_is(symname, "__mod_pnp_card_device_table"))
 824                do_pnp_card_entries(symval, sym->st_size, mod);
 825        else if (sym_is(symname, "__mod_pcmcia_device_table"))
 826                do_table(symval, sym->st_size,
 827                         sizeof(struct pcmcia_device_id), "pcmcia",
 828                         do_pcmcia_entry, mod);
 829        else if (sym_is(symname, "__mod_of_device_table"))
 830                do_table(symval, sym->st_size,
 831                         sizeof(struct of_device_id), "of",
 832                         do_of_entry, mod);
 833        else if (sym_is(symname, "__mod_vio_device_table"))
 834                do_table(symval, sym->st_size,
 835                         sizeof(struct vio_device_id), "vio",
 836                         do_vio_entry, mod);
 837        else if (sym_is(symname, "__mod_input_device_table"))
 838                do_table(symval, sym->st_size,
 839                         sizeof(struct input_device_id), "input",
 840                         do_input_entry, mod);
 841        else if (sym_is(symname, "__mod_eisa_device_table"))
 842                do_table(symval, sym->st_size,
 843                         sizeof(struct eisa_device_id), "eisa",
 844                         do_eisa_entry, mod);
 845        else if (sym_is(symname, "__mod_parisc_device_table"))
 846                do_table(symval, sym->st_size,
 847                         sizeof(struct parisc_device_id), "parisc",
 848                         do_parisc_entry, mod);
 849        else if (sym_is(symname, "__mod_sdio_device_table"))
 850                do_table(symval, sym->st_size,
 851                         sizeof(struct sdio_device_id), "sdio",
 852                         do_sdio_entry, mod);
 853        else if (sym_is(symname, "__mod_ssb_device_table"))
 854                do_table(symval, sym->st_size,
 855                         sizeof(struct ssb_device_id), "ssb",
 856                         do_ssb_entry, mod);
 857        else if (sym_is(symname, "__mod_virtio_device_table"))
 858                do_table(symval, sym->st_size,
 859                         sizeof(struct virtio_device_id), "virtio",
 860                         do_virtio_entry, mod);
 861        else if (sym_is(symname, "__mod_i2c_device_table"))
 862                do_table(symval, sym->st_size,
 863                         sizeof(struct i2c_device_id), "i2c",
 864                         do_i2c_entry, mod);
 865        else if (sym_is(symname, "__mod_spi_device_table"))
 866                do_table(symval, sym->st_size,
 867                         sizeof(struct spi_device_id), "spi",
 868                         do_spi_entry, mod);
 869        else if (sym_is(symname, "__mod_dmi_device_table"))
 870                do_table(symval, sym->st_size,
 871                         sizeof(struct dmi_system_id), "dmi",
 872                         do_dmi_entry, mod);
 873        else if (sym_is(symname, "__mod_platform_device_table"))
 874                do_table(symval, sym->st_size,
 875                         sizeof(struct platform_device_id), "platform",
 876                         do_platform_entry, mod);
 877        free(zeros);
 878}
 879
 880/* Now add out buffered information to the generated C source */
 881void add_moddevtable(struct buffer *buf, struct module *mod)
 882{
 883        buf_printf(buf, "\n");
 884        buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
 885        free(mod->dev_table_buf.p);
 886}
 887