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#include "devicetable-offsets.h"
  15
  16/* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
  17 * use either stdint.h or inttypes.h for the rest. */
  18#if KERNEL_ELFCLASS == ELFCLASS32
  19typedef Elf32_Addr      kernel_ulong_t;
  20#define BITS_PER_LONG 32
  21#else
  22typedef Elf64_Addr      kernel_ulong_t;
  23#define BITS_PER_LONG 64
  24#endif
  25#ifdef __sun__
  26#include <inttypes.h>
  27#else
  28#include <stdint.h>
  29#endif
  30
  31#include <ctype.h>
  32#include <stdbool.h>
  33
  34typedef uint32_t        __u32;
  35typedef uint16_t        __u16;
  36typedef unsigned char   __u8;
  37typedef struct {
  38        __u8 b[16];
  39} guid_t;
  40
  41/* backwards compatibility, don't use in new code */
  42typedef struct {
  43        __u8 b[16];
  44} uuid_le;
  45typedef struct {
  46        __u8 b[16];
  47} uuid_t;
  48#define UUID_STRING_LEN         36
  49
  50/* Big exception to the "don't include kernel headers into userspace, which
  51 * even potentially has different endianness and word sizes, since
  52 * we handle those differences explicitly below */
  53#include "../../include/linux/mod_devicetable.h"
  54
  55/* This array collects all instances that use the generic do_table */
  56struct devtable {
  57        const char *device_id; /* name of table, __mod_<name>__*_device_table. */
  58        unsigned long id_size;
  59        int (*do_entry)(const char *filename, void *symval, char *alias);
  60};
  61
  62/* Size of alias provided to do_entry functions */
  63#define ALIAS_SIZE 500
  64
  65/* Define a variable f that holds the value of field f of struct devid
  66 * based at address m.
  67 */
  68#define DEF_FIELD(m, devid, f) \
  69        typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))
  70
  71/* Define a variable v that holds the address of field f of struct devid
  72 * based at address m.  Due to the way typeof works, for a field of type
  73 * T[N] the variable has type T(*)[N], _not_ T*.
  74 */
  75#define DEF_FIELD_ADDR_VAR(m, devid, f, v) \
  76        typeof(((struct devid *)0)->f) *v = ((m) + OFF_##devid##_##f)
  77
  78/* Define a variable f that holds the address of field f of struct devid
  79 * based at address m.  Due to the way typeof works, for a field of type
  80 * T[N] the variable has type T(*)[N], _not_ T*.
  81 */
  82#define DEF_FIELD_ADDR(m, devid, f) \
  83        DEF_FIELD_ADDR_VAR(m, devid, f, f)
  84
  85#define ADD(str, sep, cond, field)                              \
  86do {                                                            \
  87        strcat(str, sep);                                       \
  88        if (cond)                                               \
  89                sprintf(str + strlen(str),                      \
  90                        sizeof(field) == 1 ? "%02X" :           \
  91                        sizeof(field) == 2 ? "%04X" :           \
  92                        sizeof(field) == 4 ? "%08X" : "",       \
  93                        field);                                 \
  94        else                                                    \
  95                sprintf(str + strlen(str), "*");                \
  96} while(0)
  97
  98/* End in a wildcard, for future extension */
  99static inline void add_wildcard(char *str)
 100{
 101        int len = strlen(str);
 102
 103        if (str[len - 1] != '*')
 104                strcat(str + len, "*");
 105}
 106
 107static inline void add_uuid(char *str, uuid_le uuid)
 108{
 109        int len = strlen(str);
 110
 111        sprintf(str + len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
 112                uuid.b[3], uuid.b[2], uuid.b[1], uuid.b[0],
 113                uuid.b[5], uuid.b[4], uuid.b[7], uuid.b[6],
 114                uuid.b[8], uuid.b[9], uuid.b[10], uuid.b[11],
 115                uuid.b[12], uuid.b[13], uuid.b[14], uuid.b[15]);
 116}
 117
 118/**
 119 * Check that sizeof(device_id type) are consistent with size of section
 120 * in .o file. If in-consistent then userspace and kernel does not agree
 121 * on actual size which is a bug.
 122 * Also verify that the final entry in the table is all zeros.
 123 * Ignore both checks if build host differ from target host and size differs.
 124 **/
 125static void device_id_check(const char *modname, const char *device_id,
 126                            unsigned long size, unsigned long id_size,
 127                            void *symval)
 128{
 129        int i;
 130
 131        if (size % id_size || size < id_size) {
 132                fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
 133                      "of the size of "
 134                      "section __mod_%s__<identifier>_device_table=%lu.\n"
 135                      "Fix definition of struct %s_device_id "
 136                      "in mod_devicetable.h\n",
 137                      modname, device_id, id_size, device_id, size, device_id);
 138        }
 139        /* Verify last one is a terminator */
 140        for (i = 0; i < id_size; i++ ) {
 141                if (*(uint8_t*)(symval+size-id_size+i)) {
 142                        fprintf(stderr,"%s: struct %s_device_id is %lu bytes.  "
 143                                "The last of %lu is:\n",
 144                                modname, device_id, id_size, size / id_size);
 145                        for (i = 0; i < id_size; i++ )
 146                                fprintf(stderr,"0x%02x ",
 147                                        *(uint8_t*)(symval+size-id_size+i) );
 148                        fprintf(stderr,"\n");
 149                        fatal("%s: struct %s_device_id is not terminated "
 150                                "with a NULL entry!\n", modname, device_id);
 151                }
 152        }
 153}
 154
 155/* USB is special because the bcdDevice can be matched against a numeric range */
 156/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */
 157static void do_usb_entry(void *symval,
 158                         unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
 159                         unsigned char range_lo, unsigned char range_hi,
 160                         unsigned char max, struct module *mod)
 161{
 162        char alias[500];
 163        DEF_FIELD(symval, usb_device_id, match_flags);
 164        DEF_FIELD(symval, usb_device_id, idVendor);
 165        DEF_FIELD(symval, usb_device_id, idProduct);
 166        DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
 167        DEF_FIELD(symval, usb_device_id, bDeviceClass);
 168        DEF_FIELD(symval, usb_device_id, bDeviceSubClass);
 169        DEF_FIELD(symval, usb_device_id, bDeviceProtocol);
 170        DEF_FIELD(symval, usb_device_id, bInterfaceClass);
 171        DEF_FIELD(symval, usb_device_id, bInterfaceSubClass);
 172        DEF_FIELD(symval, usb_device_id, bInterfaceProtocol);
 173        DEF_FIELD(symval, usb_device_id, bInterfaceNumber);
 174
 175        strcpy(alias, "usb:");
 176        ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR,
 177            idVendor);
 178        ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
 179            idProduct);
 180
 181        strcat(alias, "d");
 182        if (bcdDevice_initial_digits)
 183                sprintf(alias + strlen(alias), "%0*X",
 184                        bcdDevice_initial_digits, bcdDevice_initial);
 185        if (range_lo == range_hi)
 186                sprintf(alias + strlen(alias), "%X", range_lo);
 187        else if (range_lo > 0 || range_hi < max) {
 188                if (range_lo > 0x9 || range_hi < 0xA)
 189                        sprintf(alias + strlen(alias),
 190                                "[%X-%X]",
 191                                range_lo,
 192                                range_hi);
 193                else {
 194                        sprintf(alias + strlen(alias),
 195                                range_lo < 0x9 ? "[%X-9" : "[%X",
 196                                range_lo);
 197                        sprintf(alias + strlen(alias),
 198                                range_hi > 0xA ? "A-%X]" : "%X]",
 199                                range_hi);
 200                }
 201        }
 202        if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1))
 203                strcat(alias, "*");
 204
 205        ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
 206            bDeviceClass);
 207        ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
 208            bDeviceSubClass);
 209        ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
 210            bDeviceProtocol);
 211        ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
 212            bInterfaceClass);
 213        ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
 214            bInterfaceSubClass);
 215        ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
 216            bInterfaceProtocol);
 217        ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
 218            bInterfaceNumber);
 219
 220        add_wildcard(alias);
 221        buf_printf(&mod->dev_table_buf,
 222                   "MODULE_ALIAS(\"%s\");\n", alias);
 223}
 224
 225/* Handles increment/decrement of BCD formatted integers */
 226/* Returns the previous value, so it works like i++ or i-- */
 227static unsigned int incbcd(unsigned int *bcd,
 228                           int inc,
 229                           unsigned char max,
 230                           size_t chars)
 231{
 232        unsigned int init = *bcd, i, j;
 233        unsigned long long c, dec = 0;
 234
 235        /* If bcd is not in BCD format, just increment */
 236        if (max > 0x9) {
 237                *bcd += inc;
 238                return init;
 239        }
 240
 241        /* Convert BCD to Decimal */
 242        for (i=0 ; i < chars ; i++) {
 243                c = (*bcd >> (i << 2)) & 0xf;
 244                c = c > 9 ? 9 : c; /* force to bcd just in case */
 245                for (j=0 ; j < i ; j++)
 246                        c = c * 10;
 247                dec += c;
 248        }
 249
 250        /* Do our increment/decrement */
 251        dec += inc;
 252        *bcd  = 0;
 253
 254        /* Convert back to BCD */
 255        for (i=0 ; i < chars ; i++) {
 256                for (c=1,j=0 ; j < i ; j++)
 257                        c = c * 10;
 258                c = (dec / c) % 10;
 259                *bcd += c << (i << 2);
 260        }
 261        return init;
 262}
 263
 264static void do_usb_entry_multi(void *symval, struct module *mod)
 265{
 266        unsigned int devlo, devhi;
 267        unsigned char chi, clo, max;
 268        int ndigits;
 269
 270        DEF_FIELD(symval, usb_device_id, match_flags);
 271        DEF_FIELD(symval, usb_device_id, idVendor);
 272        DEF_FIELD(symval, usb_device_id, idProduct);
 273        DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
 274        DEF_FIELD(symval, usb_device_id, bcdDevice_hi);
 275        DEF_FIELD(symval, usb_device_id, bDeviceClass);
 276        DEF_FIELD(symval, usb_device_id, bInterfaceClass);
 277
 278        devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
 279                bcdDevice_lo : 0x0U;
 280        devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
 281                bcdDevice_hi : ~0x0U;
 282
 283        /* Figure out if this entry is in bcd or hex format */
 284        max = 0x9; /* Default to decimal format */
 285        for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) {
 286                clo = (devlo >> (ndigits << 2)) & 0xf;
 287                chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
 288                if (clo > max || chi > max) {
 289                        max = 0xf;
 290                        break;
 291                }
 292        }
 293
 294        /*
 295         * Some modules (visor) have empty slots as placeholder for
 296         * run-time specification that results in catch-all alias
 297         */
 298        if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass))
 299                return;
 300
 301        /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
 302        for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
 303                clo = devlo & 0xf;
 304                chi = devhi & 0xf;
 305                if (chi > max)  /* If we are in bcd mode, truncate if necessary */
 306                        chi = max;
 307                devlo >>= 4;
 308                devhi >>= 4;
 309
 310                if (devlo == devhi || !ndigits) {
 311                        do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod);
 312                        break;
 313                }
 314
 315                if (clo > 0x0)
 316                        do_usb_entry(symval,
 317                                     incbcd(&devlo, 1, max,
 318                                            sizeof(bcdDevice_lo) * 2),
 319                                     ndigits, clo, max, max, mod);
 320
 321                if (chi < max)
 322                        do_usb_entry(symval,
 323                                     incbcd(&devhi, -1, max,
 324                                            sizeof(bcdDevice_lo) * 2),
 325                                     ndigits, 0x0, chi, max, mod);
 326        }
 327}
 328
 329static void do_usb_table(void *symval, unsigned long size,
 330                         struct module *mod)
 331{
 332        unsigned int i;
 333        const unsigned long id_size = SIZE_usb_device_id;
 334
 335        device_id_check(mod->name, "usb", size, id_size, symval);
 336
 337        /* Leave last one: it's the terminator. */
 338        size -= id_size;
 339
 340        for (i = 0; i < size; i += id_size)
 341                do_usb_entry_multi(symval + i, mod);
 342}
 343
 344static void do_of_entry_multi(void *symval, struct module *mod)
 345{
 346        char alias[500];
 347        int len;
 348        char *tmp;
 349
 350        DEF_FIELD_ADDR(symval, of_device_id, name);
 351        DEF_FIELD_ADDR(symval, of_device_id, type);
 352        DEF_FIELD_ADDR(symval, of_device_id, compatible);
 353
 354        len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*",
 355                      (*type)[0] ? *type : "*");
 356
 357        if ((*compatible)[0])
 358                sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "",
 359                        *compatible);
 360
 361        /* Replace all whitespace with underscores */
 362        for (tmp = alias; tmp && *tmp; tmp++)
 363                if (isspace(*tmp))
 364                        *tmp = '_';
 365
 366        buf_printf(&mod->dev_table_buf, "MODULE_ALIAS(\"%s\");\n", alias);
 367        strcat(alias, "C");
 368        add_wildcard(alias);
 369        buf_printf(&mod->dev_table_buf, "MODULE_ALIAS(\"%s\");\n", alias);
 370}
 371
 372static void do_of_table(void *symval, unsigned long size,
 373                        struct module *mod)
 374{
 375        unsigned int i;
 376        const unsigned long id_size = SIZE_of_device_id;
 377
 378        device_id_check(mod->name, "of", size, id_size, symval);
 379
 380        /* Leave last one: it's the terminator. */
 381        size -= id_size;
 382
 383        for (i = 0; i < size; i += id_size)
 384                do_of_entry_multi(symval + i, mod);
 385}
 386
 387/* Looks like: hid:bNvNpN */
 388static int do_hid_entry(const char *filename,
 389                             void *symval, char *alias)
 390{
 391        DEF_FIELD(symval, hid_device_id, bus);
 392        DEF_FIELD(symval, hid_device_id, group);
 393        DEF_FIELD(symval, hid_device_id, vendor);
 394        DEF_FIELD(symval, hid_device_id, product);
 395
 396        sprintf(alias, "hid:");
 397        ADD(alias, "b", bus != HID_BUS_ANY, bus);
 398        ADD(alias, "g", group != HID_GROUP_ANY, group);
 399        ADD(alias, "v", vendor != HID_ANY_ID, vendor);
 400        ADD(alias, "p", product != HID_ANY_ID, product);
 401
 402        return 1;
 403}
 404
 405/* Looks like: ieee1394:venNmoNspNverN */
 406static int do_ieee1394_entry(const char *filename,
 407                             void *symval, char *alias)
 408{
 409        DEF_FIELD(symval, ieee1394_device_id, match_flags);
 410        DEF_FIELD(symval, ieee1394_device_id, vendor_id);
 411        DEF_FIELD(symval, ieee1394_device_id, model_id);
 412        DEF_FIELD(symval, ieee1394_device_id, specifier_id);
 413        DEF_FIELD(symval, ieee1394_device_id, version);
 414
 415        strcpy(alias, "ieee1394:");
 416        ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID,
 417            vendor_id);
 418        ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID,
 419            model_id);
 420        ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID,
 421            specifier_id);
 422        ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION,
 423            version);
 424
 425        add_wildcard(alias);
 426        return 1;
 427}
 428
 429/* Looks like: pci:vNdNsvNsdNbcNscNiN or <prefix>_pci:vNdNsvNsdNbcNscNiN. */
 430static int do_pci_entry(const char *filename,
 431                        void *symval, char *alias)
 432{
 433        /* Class field can be divided into these three. */
 434        unsigned char baseclass, subclass, interface,
 435                baseclass_mask, subclass_mask, interface_mask;
 436
 437        DEF_FIELD(symval, pci_device_id, vendor);
 438        DEF_FIELD(symval, pci_device_id, device);
 439        DEF_FIELD(symval, pci_device_id, subvendor);
 440        DEF_FIELD(symval, pci_device_id, subdevice);
 441        DEF_FIELD(symval, pci_device_id, class);
 442        DEF_FIELD(symval, pci_device_id, class_mask);
 443        DEF_FIELD(symval, pci_device_id, override_only);
 444
 445        switch (override_only) {
 446        case 0:
 447                strcpy(alias, "pci:");
 448                break;
 449        case PCI_ID_F_VFIO_DRIVER_OVERRIDE:
 450                strcpy(alias, "vfio_pci:");
 451                break;
 452        default:
 453                warn("Unknown PCI driver_override alias %08X\n",
 454                     override_only);
 455                return 0;
 456        }
 457
 458        ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
 459        ADD(alias, "d", device != PCI_ANY_ID, device);
 460        ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
 461        ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);
 462
 463        baseclass = (class) >> 16;
 464        baseclass_mask = (class_mask) >> 16;
 465        subclass = (class) >> 8;
 466        subclass_mask = (class_mask) >> 8;
 467        interface = class;
 468        interface_mask = class_mask;
 469
 470        if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
 471            || (subclass_mask != 0 && subclass_mask != 0xFF)
 472            || (interface_mask != 0 && interface_mask != 0xFF)) {
 473                warn("Can't handle masks in %s:%04X\n",
 474                     filename, class_mask);
 475                return 0;
 476        }
 477
 478        ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
 479        ADD(alias, "sc", subclass_mask == 0xFF, subclass);
 480        ADD(alias, "i", interface_mask == 0xFF, interface);
 481        add_wildcard(alias);
 482        return 1;
 483}
 484
 485/* looks like: "ccw:tNmNdtNdmN" */
 486static int do_ccw_entry(const char *filename,
 487                        void *symval, char *alias)
 488{
 489        DEF_FIELD(symval, ccw_device_id, match_flags);
 490        DEF_FIELD(symval, ccw_device_id, cu_type);
 491        DEF_FIELD(symval, ccw_device_id, cu_model);
 492        DEF_FIELD(symval, ccw_device_id, dev_type);
 493        DEF_FIELD(symval, ccw_device_id, dev_model);
 494
 495        strcpy(alias, "ccw:");
 496        ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
 497            cu_type);
 498        ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
 499            cu_model);
 500        ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
 501            dev_type);
 502        ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
 503            dev_model);
 504        add_wildcard(alias);
 505        return 1;
 506}
 507
 508/* looks like: "ap:tN" */
 509static int do_ap_entry(const char *filename,
 510                       void *symval, char *alias)
 511{
 512        DEF_FIELD(symval, ap_device_id, dev_type);
 513
 514        sprintf(alias, "ap:t%02X*", dev_type);
 515        return 1;
 516}
 517
 518/* looks like: "css:tN" */
 519static int do_css_entry(const char *filename,
 520                        void *symval, char *alias)
 521{
 522        DEF_FIELD(symval, css_device_id, type);
 523
 524        sprintf(alias, "css:t%01X", type);
 525        return 1;
 526}
 527
 528/* Looks like: "serio:tyNprNidNexN" */
 529static int do_serio_entry(const char *filename,
 530                          void *symval, char *alias)
 531{
 532        DEF_FIELD(symval, serio_device_id, type);
 533        DEF_FIELD(symval, serio_device_id, proto);
 534        DEF_FIELD(symval, serio_device_id, id);
 535        DEF_FIELD(symval, serio_device_id, extra);
 536
 537        strcpy(alias, "serio:");
 538        ADD(alias, "ty", type != SERIO_ANY, type);
 539        ADD(alias, "pr", proto != SERIO_ANY, proto);
 540        ADD(alias, "id", id != SERIO_ANY, id);
 541        ADD(alias, "ex", extra != SERIO_ANY, extra);
 542
 543        add_wildcard(alias);
 544        return 1;
 545}
 546
 547/* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
 548 *             "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
 549 *
 550 * NOTE: Each driver should use one of the following : _HID, _CIDs
 551 *       or _CLS. Also, bb, ss, and pp can be substituted with ??
 552 *       as don't care byte.
 553 */
 554static int do_acpi_entry(const char *filename,
 555                        void *symval, char *alias)
 556{
 557        DEF_FIELD_ADDR(symval, acpi_device_id, id);
 558        DEF_FIELD_ADDR(symval, acpi_device_id, cls);
 559        DEF_FIELD_ADDR(symval, acpi_device_id, cls_msk);
 560
 561        if (id && strlen((const char *)*id))
 562                sprintf(alias, "acpi*:%s:*", *id);
 563        else if (cls) {
 564                int i, byte_shift, cnt = 0;
 565                unsigned int msk;
 566
 567                sprintf(&alias[cnt], "acpi*:");
 568                cnt = 6;
 569                for (i = 1; i <= 3; i++) {
 570                        byte_shift = 8 * (3-i);
 571                        msk = (*cls_msk >> byte_shift) & 0xFF;
 572                        if (msk)
 573                                sprintf(&alias[cnt], "%02x",
 574                                        (*cls >> byte_shift) & 0xFF);
 575                        else
 576                                sprintf(&alias[cnt], "??");
 577                        cnt += 2;
 578                }
 579                sprintf(&alias[cnt], ":*");
 580        }
 581        return 1;
 582}
 583
 584/* looks like: "pnp:dD" */
 585static void do_pnp_device_entry(void *symval, unsigned long size,
 586                                struct module *mod)
 587{
 588        const unsigned long id_size = SIZE_pnp_device_id;
 589        const unsigned int count = (size / id_size)-1;
 590        unsigned int i;
 591
 592        device_id_check(mod->name, "pnp", size, id_size, symval);
 593
 594        for (i = 0; i < count; i++) {
 595                DEF_FIELD_ADDR(symval + i*id_size, pnp_device_id, id);
 596                char acpi_id[sizeof(*id)];
 597                int j;
 598
 599                buf_printf(&mod->dev_table_buf,
 600                           "MODULE_ALIAS(\"pnp:d%s*\");\n", *id);
 601
 602                /* fix broken pnp bus lowercasing */
 603                for (j = 0; j < sizeof(acpi_id); j++)
 604                        acpi_id[j] = toupper((*id)[j]);
 605                buf_printf(&mod->dev_table_buf,
 606                           "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 607        }
 608}
 609
 610/* looks like: "pnp:dD" for every device of the card */
 611static void do_pnp_card_entries(void *symval, unsigned long size,
 612                                struct module *mod)
 613{
 614        const unsigned long id_size = SIZE_pnp_card_device_id;
 615        const unsigned int count = (size / id_size)-1;
 616        unsigned int i;
 617
 618        device_id_check(mod->name, "pnp", size, id_size, symval);
 619
 620        for (i = 0; i < count; i++) {
 621                unsigned int j;
 622                DEF_FIELD_ADDR(symval + i * id_size, pnp_card_device_id, devs);
 623
 624                for (j = 0; j < PNP_MAX_DEVICES; j++) {
 625                        const char *id = (char *)(*devs)[j].id;
 626                        int i2, j2;
 627                        int dup = 0;
 628
 629                        if (!id[0])
 630                                break;
 631
 632                        /* find duplicate, already added value */
 633                        for (i2 = 0; i2 < i && !dup; i2++) {
 634                                DEF_FIELD_ADDR_VAR(symval + i2 * id_size,
 635                                                   pnp_card_device_id,
 636                                                   devs, devs_dup);
 637
 638                                for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
 639                                        const char *id2 =
 640                                                (char *)(*devs_dup)[j2].id;
 641
 642                                        if (!id2[0])
 643                                                break;
 644
 645                                        if (!strcmp(id, id2)) {
 646                                                dup = 1;
 647                                                break;
 648                                        }
 649                                }
 650                        }
 651
 652                        /* add an individual alias for every device entry */
 653                        if (!dup) {
 654                                char acpi_id[PNP_ID_LEN];
 655                                int k;
 656
 657                                buf_printf(&mod->dev_table_buf,
 658                                           "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 659
 660                                /* fix broken pnp bus lowercasing */
 661                                for (k = 0; k < sizeof(acpi_id); k++)
 662                                        acpi_id[k] = toupper(id[k]);
 663                                buf_printf(&mod->dev_table_buf,
 664                                           "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 665                        }
 666                }
 667        }
 668}
 669
 670/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
 671static int do_pcmcia_entry(const char *filename,
 672                           void *symval, char *alias)
 673{
 674        unsigned int i;
 675        DEF_FIELD(symval, pcmcia_device_id, match_flags);
 676        DEF_FIELD(symval, pcmcia_device_id, manf_id);
 677        DEF_FIELD(symval, pcmcia_device_id, card_id);
 678        DEF_FIELD(symval, pcmcia_device_id, func_id);
 679        DEF_FIELD(symval, pcmcia_device_id, function);
 680        DEF_FIELD(symval, pcmcia_device_id, device_no);
 681        DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
 682
 683        for (i=0; i<4; i++) {
 684                (*prod_id_hash)[i] = TO_NATIVE((*prod_id_hash)[i]);
 685        }
 686
 687        strcpy(alias, "pcmcia:");
 688        ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
 689            manf_id);
 690        ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
 691            card_id);
 692        ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
 693            func_id);
 694        ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
 695            function);
 696        ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
 697            device_no);
 698        ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, (*prod_id_hash)[0]);
 699        ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, (*prod_id_hash)[1]);
 700        ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, (*prod_id_hash)[2]);
 701        ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, (*prod_id_hash)[3]);
 702
 703        add_wildcard(alias);
 704        return 1;
 705}
 706
 707static int do_vio_entry(const char *filename, void *symval,
 708                char *alias)
 709{
 710        char *tmp;
 711        DEF_FIELD_ADDR(symval, vio_device_id, type);
 712        DEF_FIELD_ADDR(symval, vio_device_id, compat);
 713
 714        sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
 715                        (*compat)[0] ? *compat : "*");
 716
 717        /* Replace all whitespace with underscores */
 718        for (tmp = alias; tmp && *tmp; tmp++)
 719                if (isspace (*tmp))
 720                        *tmp = '_';
 721
 722        add_wildcard(alias);
 723        return 1;
 724}
 725
 726#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 727
 728static void do_input(char *alias,
 729                     kernel_ulong_t *arr, unsigned int min, unsigned int max)
 730{
 731        unsigned int i;
 732
 733        for (i = min / BITS_PER_LONG; i < max / BITS_PER_LONG + 1; i++)
 734                arr[i] = TO_NATIVE(arr[i]);
 735        for (i = min; i < max; i++)
 736                if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
 737                        sprintf(alias + strlen(alias), "%X,*", i);
 738}
 739
 740/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
 741static int do_input_entry(const char *filename, void *symval,
 742                          char *alias)
 743{
 744        DEF_FIELD(symval, input_device_id, flags);
 745        DEF_FIELD(symval, input_device_id, bustype);
 746        DEF_FIELD(symval, input_device_id, vendor);
 747        DEF_FIELD(symval, input_device_id, product);
 748        DEF_FIELD(symval, input_device_id, version);
 749        DEF_FIELD_ADDR(symval, input_device_id, evbit);
 750        DEF_FIELD_ADDR(symval, input_device_id, keybit);
 751        DEF_FIELD_ADDR(symval, input_device_id, relbit);
 752        DEF_FIELD_ADDR(symval, input_device_id, absbit);
 753        DEF_FIELD_ADDR(symval, input_device_id, mscbit);
 754        DEF_FIELD_ADDR(symval, input_device_id, ledbit);
 755        DEF_FIELD_ADDR(symval, input_device_id, sndbit);
 756        DEF_FIELD_ADDR(symval, input_device_id, ffbit);
 757        DEF_FIELD_ADDR(symval, input_device_id, swbit);
 758
 759        sprintf(alias, "input:");
 760
 761        ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
 762        ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
 763        ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
 764        ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);
 765
 766        sprintf(alias + strlen(alias), "-e*");
 767        if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
 768                do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
 769        sprintf(alias + strlen(alias), "k*");
 770        if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
 771                do_input(alias, *keybit,
 772                         INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
 773                         INPUT_DEVICE_ID_KEY_MAX);
 774        sprintf(alias + strlen(alias), "r*");
 775        if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
 776                do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
 777        sprintf(alias + strlen(alias), "a*");
 778        if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
 779                do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
 780        sprintf(alias + strlen(alias), "m*");
 781        if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
 782                do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
 783        sprintf(alias + strlen(alias), "l*");
 784        if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
 785                do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
 786        sprintf(alias + strlen(alias), "s*");
 787        if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
 788                do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
 789        sprintf(alias + strlen(alias), "f*");
 790        if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
 791                do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
 792        sprintf(alias + strlen(alias), "w*");
 793        if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
 794                do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
 795        return 1;
 796}
 797
 798static int do_eisa_entry(const char *filename, void *symval,
 799                char *alias)
 800{
 801        DEF_FIELD_ADDR(symval, eisa_device_id, sig);
 802        if (sig[0])
 803                sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", *sig);
 804        else
 805                strcat(alias, "*");
 806        return 1;
 807}
 808
 809/* Looks like: parisc:tNhvNrevNsvN */
 810static int do_parisc_entry(const char *filename, void *symval,
 811                char *alias)
 812{
 813        DEF_FIELD(symval, parisc_device_id, hw_type);
 814        DEF_FIELD(symval, parisc_device_id, hversion);
 815        DEF_FIELD(symval, parisc_device_id, hversion_rev);
 816        DEF_FIELD(symval, parisc_device_id, sversion);
 817
 818        strcpy(alias, "parisc:");
 819        ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
 820        ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
 821        ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
 822        ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);
 823
 824        add_wildcard(alias);
 825        return 1;
 826}
 827
 828/* Looks like: sdio:cNvNdN. */
 829static int do_sdio_entry(const char *filename,
 830                        void *symval, char *alias)
 831{
 832        DEF_FIELD(symval, sdio_device_id, class);
 833        DEF_FIELD(symval, sdio_device_id, vendor);
 834        DEF_FIELD(symval, sdio_device_id, device);
 835
 836        strcpy(alias, "sdio:");
 837        ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
 838        ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
 839        ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
 840        add_wildcard(alias);
 841        return 1;
 842}
 843
 844/* Looks like: ssb:vNidNrevN. */
 845static int do_ssb_entry(const char *filename,
 846                        void *symval, char *alias)
 847{
 848        DEF_FIELD(symval, ssb_device_id, vendor);
 849        DEF_FIELD(symval, ssb_device_id, coreid);
 850        DEF_FIELD(symval, ssb_device_id, revision);
 851
 852        strcpy(alias, "ssb:");
 853        ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
 854        ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
 855        ADD(alias, "rev", revision != SSB_ANY_REV, revision);
 856        add_wildcard(alias);
 857        return 1;
 858}
 859
 860/* Looks like: bcma:mNidNrevNclN. */
 861static int do_bcma_entry(const char *filename,
 862                         void *symval, char *alias)
 863{
 864        DEF_FIELD(symval, bcma_device_id, manuf);
 865        DEF_FIELD(symval, bcma_device_id, id);
 866        DEF_FIELD(symval, bcma_device_id, rev);
 867        DEF_FIELD(symval, bcma_device_id, class);
 868
 869        strcpy(alias, "bcma:");
 870        ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
 871        ADD(alias, "id", id != BCMA_ANY_ID, id);
 872        ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
 873        ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
 874        add_wildcard(alias);
 875        return 1;
 876}
 877
 878/* Looks like: virtio:dNvN */
 879static int do_virtio_entry(const char *filename, void *symval,
 880                           char *alias)
 881{
 882        DEF_FIELD(symval, virtio_device_id, device);
 883        DEF_FIELD(symval, virtio_device_id, vendor);
 884
 885        strcpy(alias, "virtio:");
 886        ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
 887        ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
 888
 889        add_wildcard(alias);
 890        return 1;
 891}
 892
 893/*
 894 * Looks like: vmbus:guid
 895 * Each byte of the guid will be represented by two hex characters
 896 * in the name.
 897 */
 898
 899static int do_vmbus_entry(const char *filename, void *symval,
 900                          char *alias)
 901{
 902        int i;
 903        DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
 904        char guid_name[(sizeof(*guid) + 1) * 2];
 905
 906        for (i = 0; i < (sizeof(*guid) * 2); i += 2)
 907                sprintf(&guid_name[i], "%02x", TO_NATIVE((guid->b)[i/2]));
 908
 909        strcpy(alias, "vmbus:");
 910        strcat(alias, guid_name);
 911
 912        return 1;
 913}
 914
 915/* Looks like: rpmsg:S */
 916static int do_rpmsg_entry(const char *filename, void *symval,
 917                          char *alias)
 918{
 919        DEF_FIELD_ADDR(symval, rpmsg_device_id, name);
 920        sprintf(alias, RPMSG_DEVICE_MODALIAS_FMT, *name);
 921
 922        return 1;
 923}
 924
 925/* Looks like: i2c:S */
 926static int do_i2c_entry(const char *filename, void *symval,
 927                        char *alias)
 928{
 929        DEF_FIELD_ADDR(symval, i2c_device_id, name);
 930        sprintf(alias, I2C_MODULE_PREFIX "%s", *name);
 931
 932        return 1;
 933}
 934
 935static int do_i3c_entry(const char *filename, void *symval,
 936                        char *alias)
 937{
 938        DEF_FIELD(symval, i3c_device_id, match_flags);
 939        DEF_FIELD(symval, i3c_device_id, dcr);
 940        DEF_FIELD(symval, i3c_device_id, manuf_id);
 941        DEF_FIELD(symval, i3c_device_id, part_id);
 942        DEF_FIELD(symval, i3c_device_id, extra_info);
 943
 944        strcpy(alias, "i3c:");
 945        ADD(alias, "dcr", match_flags & I3C_MATCH_DCR, dcr);
 946        ADD(alias, "manuf", match_flags & I3C_MATCH_MANUF, manuf_id);
 947        ADD(alias, "part", match_flags & I3C_MATCH_PART, part_id);
 948        ADD(alias, "ext", match_flags & I3C_MATCH_EXTRA_INFO, extra_info);
 949
 950        return 1;
 951}
 952
 953/* Looks like: spi:S */
 954static int do_spi_entry(const char *filename, void *symval,
 955                        char *alias)
 956{
 957        DEF_FIELD_ADDR(symval, spi_device_id, name);
 958        sprintf(alias, SPI_MODULE_PREFIX "%s", *name);
 959
 960        return 1;
 961}
 962
 963static const struct dmifield {
 964        const char *prefix;
 965        int field;
 966} dmi_fields[] = {
 967        { "bvn", DMI_BIOS_VENDOR },
 968        { "bvr", DMI_BIOS_VERSION },
 969        { "bd",  DMI_BIOS_DATE },
 970        { "br",  DMI_BIOS_RELEASE },
 971        { "efr", DMI_EC_FIRMWARE_RELEASE },
 972        { "svn", DMI_SYS_VENDOR },
 973        { "pn",  DMI_PRODUCT_NAME },
 974        { "pvr", DMI_PRODUCT_VERSION },
 975        { "rvn", DMI_BOARD_VENDOR },
 976        { "rn",  DMI_BOARD_NAME },
 977        { "rvr", DMI_BOARD_VERSION },
 978        { "cvn", DMI_CHASSIS_VENDOR },
 979        { "ct",  DMI_CHASSIS_TYPE },
 980        { "cvr", DMI_CHASSIS_VERSION },
 981        { NULL,  DMI_NONE }
 982};
 983
 984static void dmi_ascii_filter(char *d, const char *s)
 985{
 986        /* Filter out characters we don't want to see in the modalias string */
 987        for (; *s; s++)
 988                if (*s > ' ' && *s < 127 && *s != ':')
 989                        *(d++) = *s;
 990
 991        *d = 0;
 992}
 993
 994
 995static int do_dmi_entry(const char *filename, void *symval,
 996                        char *alias)
 997{
 998        int i, j;
 999        DEF_FIELD_ADDR(symval, dmi_system_id, matches);
1000        sprintf(alias, "dmi*");
1001
1002        for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
1003                for (j = 0; j < 4; j++) {
1004                        if ((*matches)[j].slot &&
1005                            (*matches)[j].slot == dmi_fields[i].field) {
1006                                sprintf(alias + strlen(alias), ":%s*",
1007                                        dmi_fields[i].prefix);
1008                                dmi_ascii_filter(alias + strlen(alias),
1009                                                 (*matches)[j].substr);
1010                                strcat(alias, "*");
1011                        }
1012                }
1013        }
1014
1015        strcat(alias, ":");
1016        return 1;
1017}
1018
1019static int do_platform_entry(const char *filename,
1020                             void *symval, char *alias)
1021{
1022        DEF_FIELD_ADDR(symval, platform_device_id, name);
1023        sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
1024        return 1;
1025}
1026
1027static int do_mdio_entry(const char *filename,
1028                         void *symval, char *alias)
1029{
1030        int i;
1031        DEF_FIELD(symval, mdio_device_id, phy_id);
1032        DEF_FIELD(symval, mdio_device_id, phy_id_mask);
1033
1034        alias += sprintf(alias, MDIO_MODULE_PREFIX);
1035
1036        for (i = 0; i < 32; i++) {
1037                if (!((phy_id_mask >> (31-i)) & 1))
1038                        *(alias++) = '?';
1039                else if ((phy_id >> (31-i)) & 1)
1040                        *(alias++) = '1';
1041                else
1042                        *(alias++) = '0';
1043        }
1044
1045        /* Terminate the string */
1046        *alias = 0;
1047
1048        return 1;
1049}
1050
1051/* Looks like: zorro:iN. */
1052static int do_zorro_entry(const char *filename, void *symval,
1053                          char *alias)
1054{
1055        DEF_FIELD(symval, zorro_device_id, id);
1056        strcpy(alias, "zorro:");
1057        ADD(alias, "i", id != ZORRO_WILDCARD, id);
1058        return 1;
1059}
1060
1061/* looks like: "pnp:dD" */
1062static int do_isapnp_entry(const char *filename,
1063                           void *symval, char *alias)
1064{
1065        DEF_FIELD(symval, isapnp_device_id, vendor);
1066        DEF_FIELD(symval, isapnp_device_id, function);
1067        sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
1068                'A' + ((vendor >> 2) & 0x3f) - 1,
1069                'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
1070                'A' + ((vendor >> 8) & 0x1f) - 1,
1071                (function >> 4) & 0x0f, function & 0x0f,
1072                (function >> 12) & 0x0f, (function >> 8) & 0x0f);
1073        return 1;
1074}
1075
1076/* Looks like: "ipack:fNvNdN". */
1077static int do_ipack_entry(const char *filename,
1078                          void *symval, char *alias)
1079{
1080        DEF_FIELD(symval, ipack_device_id, format);
1081        DEF_FIELD(symval, ipack_device_id, vendor);
1082        DEF_FIELD(symval, ipack_device_id, device);
1083        strcpy(alias, "ipack:");
1084        ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
1085        ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
1086        ADD(alias, "d", device != IPACK_ANY_ID, device);
1087        add_wildcard(alias);
1088        return 1;
1089}
1090
1091/*
1092 * Append a match expression for a single masked hex digit.
1093 * outp points to a pointer to the character at which to append.
1094 *      *outp is updated on return to point just after the appended text,
1095 *      to facilitate further appending.
1096 */
1097static void append_nibble_mask(char **outp,
1098                               unsigned int nibble, unsigned int mask)
1099{
1100        char *p = *outp;
1101        unsigned int i;
1102
1103        switch (mask) {
1104        case 0:
1105                *p++ = '?';
1106                break;
1107
1108        case 0xf:
1109                p += sprintf(p, "%X",  nibble);
1110                break;
1111
1112        default:
1113                /*
1114                 * Dumbly emit a match pattern for all possible matching
1115                 * digits.  This could be improved in some cases using ranges,
1116                 * but it has the advantage of being trivially correct, and is
1117                 * often optimal.
1118                 */
1119                *p++ = '[';
1120                for (i = 0; i < 0x10; i++)
1121                        if ((i & mask) == nibble)
1122                                p += sprintf(p, "%X", i);
1123                *p++ = ']';
1124        }
1125
1126        /* Ensure that the string remains NUL-terminated: */
1127        *p = '\0';
1128
1129        /* Advance the caller's end-of-string pointer: */
1130        *outp = p;
1131}
1132
1133/*
1134 * looks like: "amba:dN"
1135 *
1136 * N is exactly 8 digits, where each is an upper-case hex digit, or
1137 *      a ? or [] pattern matching exactly one digit.
1138 */
1139static int do_amba_entry(const char *filename,
1140                         void *symval, char *alias)
1141{
1142        unsigned int digit;
1143        char *p = alias;
1144        DEF_FIELD(symval, amba_id, id);
1145        DEF_FIELD(symval, amba_id, mask);
1146
1147        if ((id & mask) != id)
1148                fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: "
1149                      "id=0x%08X, mask=0x%08X.  Please fix this driver.\n",
1150                      filename, id, mask);
1151
1152        p += sprintf(alias, "amba:d");
1153        for (digit = 0; digit < 8; digit++)
1154                append_nibble_mask(&p,
1155                                   (id >> (4 * (7 - digit))) & 0xf,
1156                                   (mask >> (4 * (7 - digit))) & 0xf);
1157
1158        return 1;
1159}
1160
1161/*
1162 * looks like: "mipscdmm:tN"
1163 *
1164 * N is exactly 2 digits, where each is an upper-case hex digit, or
1165 *      a ? or [] pattern matching exactly one digit.
1166 */
1167static int do_mips_cdmm_entry(const char *filename,
1168                              void *symval, char *alias)
1169{
1170        DEF_FIELD(symval, mips_cdmm_device_id, type);
1171
1172        sprintf(alias, "mipscdmm:t%02X*", type);
1173        return 1;
1174}
1175
1176/* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
1177 * All fields are numbers. It would be nicer to use strings for vendor
1178 * and feature, but getting those out of the build system here is too
1179 * complicated.
1180 */
1181
1182static int do_x86cpu_entry(const char *filename, void *symval,
1183                           char *alias)
1184{
1185        DEF_FIELD(symval, x86_cpu_id, feature);
1186        DEF_FIELD(symval, x86_cpu_id, family);
1187        DEF_FIELD(symval, x86_cpu_id, model);
1188        DEF_FIELD(symval, x86_cpu_id, vendor);
1189
1190        strcpy(alias, "cpu:type:x86,");
1191        ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor);
1192        ADD(alias, "fam", family != X86_FAMILY_ANY, family);
1193        ADD(alias, "mod", model  != X86_MODEL_ANY,  model);
1194        strcat(alias, ":feature:*");
1195        if (feature != X86_FEATURE_ANY)
1196                sprintf(alias + strlen(alias), "%04X*", feature);
1197        return 1;
1198}
1199
1200/* LOOKS like cpu:type:*:feature:*FEAT* */
1201static int do_cpu_entry(const char *filename, void *symval, char *alias)
1202{
1203        DEF_FIELD(symval, cpu_feature, feature);
1204
1205        sprintf(alias, "cpu:type:*:feature:*%04X*", feature);
1206        return 1;
1207}
1208
1209/* Looks like: mei:S:uuid:N:* */
1210static int do_mei_entry(const char *filename, void *symval,
1211                        char *alias)
1212{
1213        DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
1214        DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid);
1215        DEF_FIELD(symval, mei_cl_device_id, version);
1216
1217        sprintf(alias, MEI_CL_MODULE_PREFIX);
1218        sprintf(alias + strlen(alias), "%s:",  (*name)[0]  ? *name : "*");
1219        add_uuid(alias, *uuid);
1220        ADD(alias, ":", version != MEI_CL_VERSION_ANY, version);
1221
1222        strcat(alias, ":*");
1223
1224        return 1;
1225}
1226
1227/* Looks like: rapidio:vNdNavNadN */
1228static int do_rio_entry(const char *filename,
1229                        void *symval, char *alias)
1230{
1231        DEF_FIELD(symval, rio_device_id, did);
1232        DEF_FIELD(symval, rio_device_id, vid);
1233        DEF_FIELD(symval, rio_device_id, asm_did);
1234        DEF_FIELD(symval, rio_device_id, asm_vid);
1235
1236        strcpy(alias, "rapidio:");
1237        ADD(alias, "v", vid != RIO_ANY_ID, vid);
1238        ADD(alias, "d", did != RIO_ANY_ID, did);
1239        ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
1240        ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
1241
1242        add_wildcard(alias);
1243        return 1;
1244}
1245
1246/* Looks like: ulpi:vNpN */
1247static int do_ulpi_entry(const char *filename, void *symval,
1248                         char *alias)
1249{
1250        DEF_FIELD(symval, ulpi_device_id, vendor);
1251        DEF_FIELD(symval, ulpi_device_id, product);
1252
1253        sprintf(alias, "ulpi:v%04xp%04x", vendor, product);
1254
1255        return 1;
1256}
1257
1258/* Looks like: hdaudio:vNrNaN */
1259static int do_hda_entry(const char *filename, void *symval, char *alias)
1260{
1261        DEF_FIELD(symval, hda_device_id, vendor_id);
1262        DEF_FIELD(symval, hda_device_id, rev_id);
1263        DEF_FIELD(symval, hda_device_id, api_version);
1264
1265        strcpy(alias, "hdaudio:");
1266        ADD(alias, "v", vendor_id != 0, vendor_id);
1267        ADD(alias, "r", rev_id != 0, rev_id);
1268        ADD(alias, "a", api_version != 0, api_version);
1269
1270        add_wildcard(alias);
1271        return 1;
1272}
1273
1274/* Looks like: sdw:mNpNvNcN */
1275static int do_sdw_entry(const char *filename, void *symval, char *alias)
1276{
1277        DEF_FIELD(symval, sdw_device_id, mfg_id);
1278        DEF_FIELD(symval, sdw_device_id, part_id);
1279        DEF_FIELD(symval, sdw_device_id, sdw_version);
1280        DEF_FIELD(symval, sdw_device_id, class_id);
1281
1282        strcpy(alias, "sdw:");
1283        ADD(alias, "m", mfg_id != 0, mfg_id);
1284        ADD(alias, "p", part_id != 0, part_id);
1285        ADD(alias, "v", sdw_version != 0, sdw_version);
1286        ADD(alias, "c", class_id != 0, class_id);
1287
1288        add_wildcard(alias);
1289        return 1;
1290}
1291
1292/* Looks like: fsl-mc:vNdN */
1293static int do_fsl_mc_entry(const char *filename, void *symval,
1294                           char *alias)
1295{
1296        DEF_FIELD(symval, fsl_mc_device_id, vendor);
1297        DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type);
1298
1299        sprintf(alias, "fsl-mc:v%08Xd%s", vendor, *obj_type);
1300        return 1;
1301}
1302
1303/* Looks like: tbsvc:kSpNvNrN */
1304static int do_tbsvc_entry(const char *filename, void *symval, char *alias)
1305{
1306        DEF_FIELD(symval, tb_service_id, match_flags);
1307        DEF_FIELD_ADDR(symval, tb_service_id, protocol_key);
1308        DEF_FIELD(symval, tb_service_id, protocol_id);
1309        DEF_FIELD(symval, tb_service_id, protocol_version);
1310        DEF_FIELD(symval, tb_service_id, protocol_revision);
1311
1312        strcpy(alias, "tbsvc:");
1313        if (match_flags & TBSVC_MATCH_PROTOCOL_KEY)
1314                sprintf(alias + strlen(alias), "k%s", *protocol_key);
1315        else
1316                strcat(alias + strlen(alias), "k*");
1317        ADD(alias, "p", match_flags & TBSVC_MATCH_PROTOCOL_ID, protocol_id);
1318        ADD(alias, "v", match_flags & TBSVC_MATCH_PROTOCOL_VERSION,
1319            protocol_version);
1320        ADD(alias, "r", match_flags & TBSVC_MATCH_PROTOCOL_REVISION,
1321            protocol_revision);
1322
1323        add_wildcard(alias);
1324        return 1;
1325}
1326
1327/* Looks like: typec:idNmN */
1328static int do_typec_entry(const char *filename, void *symval, char *alias)
1329{
1330        DEF_FIELD(symval, typec_device_id, svid);
1331        DEF_FIELD(symval, typec_device_id, mode);
1332
1333        sprintf(alias, "typec:id%04X", svid);
1334        ADD(alias, "m", mode != TYPEC_ANY_MODE, mode);
1335
1336        return 1;
1337}
1338
1339/* Looks like: tee:uuid */
1340static int do_tee_entry(const char *filename, void *symval, char *alias)
1341{
1342        DEF_FIELD(symval, tee_client_device_id, uuid);
1343
1344        sprintf(alias, "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
1345                uuid.b[0], uuid.b[1], uuid.b[2], uuid.b[3], uuid.b[4],
1346                uuid.b[5], uuid.b[6], uuid.b[7], uuid.b[8], uuid.b[9],
1347                uuid.b[10], uuid.b[11], uuid.b[12], uuid.b[13], uuid.b[14],
1348                uuid.b[15]);
1349
1350        add_wildcard(alias);
1351        return 1;
1352}
1353
1354/* Looks like: wmi:guid */
1355static int do_wmi_entry(const char *filename, void *symval, char *alias)
1356{
1357        int len;
1358        DEF_FIELD_ADDR(symval, wmi_device_id, guid_string);
1359
1360        if (strlen(*guid_string) != UUID_STRING_LEN) {
1361                warn("Invalid WMI device id 'wmi:%s' in '%s'\n",
1362                                *guid_string, filename);
1363                return 0;
1364        }
1365
1366        len = snprintf(alias, ALIAS_SIZE, WMI_MODULE_PREFIX "%s", *guid_string);
1367        if (len < 0 || len >= ALIAS_SIZE) {
1368                warn("Could not generate all MODULE_ALIAS's in '%s'\n",
1369                                filename);
1370                return 0;
1371        }
1372        return 1;
1373}
1374
1375/* Looks like: mhi:S */
1376static int do_mhi_entry(const char *filename, void *symval, char *alias)
1377{
1378        DEF_FIELD_ADDR(symval, mhi_device_id, chan);
1379        sprintf(alias, MHI_DEVICE_MODALIAS_FMT, *chan);
1380        return 1;
1381}
1382
1383static int do_auxiliary_entry(const char *filename, void *symval, char *alias)
1384{
1385        DEF_FIELD_ADDR(symval, auxiliary_device_id, name);
1386        sprintf(alias, AUXILIARY_MODULE_PREFIX "%s", *name);
1387
1388        return 1;
1389}
1390
1391/*
1392 * Looks like: ssam:dNcNtNiNfN
1393 *
1394 * N is exactly 2 digits, where each is an upper-case hex digit.
1395 */
1396static int do_ssam_entry(const char *filename, void *symval, char *alias)
1397{
1398        DEF_FIELD(symval, ssam_device_id, match_flags);
1399        DEF_FIELD(symval, ssam_device_id, domain);
1400        DEF_FIELD(symval, ssam_device_id, category);
1401        DEF_FIELD(symval, ssam_device_id, target);
1402        DEF_FIELD(symval, ssam_device_id, instance);
1403        DEF_FIELD(symval, ssam_device_id, function);
1404
1405        sprintf(alias, "ssam:d%02Xc%02X", domain, category);
1406        ADD(alias, "t", match_flags & SSAM_MATCH_TARGET, target);
1407        ADD(alias, "i", match_flags & SSAM_MATCH_INSTANCE, instance);
1408        ADD(alias, "f", match_flags & SSAM_MATCH_FUNCTION, function);
1409
1410        return 1;
1411}
1412
1413/* Looks like: dfl:tNfN */
1414static int do_dfl_entry(const char *filename, void *symval, char *alias)
1415{
1416        DEF_FIELD(symval, dfl_device_id, type);
1417        DEF_FIELD(symval, dfl_device_id, feature_id);
1418
1419        sprintf(alias, "dfl:t%04Xf%04X", type, feature_id);
1420
1421        add_wildcard(alias);
1422        return 1;
1423}
1424
1425/* Does namelen bytes of name exactly match the symbol? */
1426static bool sym_is(const char *name, unsigned namelen, const char *symbol)
1427{
1428        if (namelen != strlen(symbol))
1429                return false;
1430
1431        return memcmp(name, symbol, namelen) == 0;
1432}
1433
1434static void do_table(void *symval, unsigned long size,
1435                     unsigned long id_size,
1436                     const char *device_id,
1437                     int (*do_entry)(const char *filename, void *symval, char *alias),
1438                     struct module *mod)
1439{
1440        unsigned int i;
1441        char alias[ALIAS_SIZE];
1442
1443        device_id_check(mod->name, device_id, size, id_size, symval);
1444        /* Leave last one: it's the terminator. */
1445        size -= id_size;
1446
1447        for (i = 0; i < size; i += id_size) {
1448                if (do_entry(mod->name, symval+i, alias)) {
1449                        buf_printf(&mod->dev_table_buf,
1450                                   "MODULE_ALIAS(\"%s\");\n", alias);
1451                }
1452        }
1453}
1454
1455static const struct devtable devtable[] = {
1456        {"hid", SIZE_hid_device_id, do_hid_entry},
1457        {"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry},
1458        {"pci", SIZE_pci_device_id, do_pci_entry},
1459        {"ccw", SIZE_ccw_device_id, do_ccw_entry},
1460        {"ap", SIZE_ap_device_id, do_ap_entry},
1461        {"css", SIZE_css_device_id, do_css_entry},
1462        {"serio", SIZE_serio_device_id, do_serio_entry},
1463        {"acpi", SIZE_acpi_device_id, do_acpi_entry},
1464        {"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry},
1465        {"vio", SIZE_vio_device_id, do_vio_entry},
1466        {"input", SIZE_input_device_id, do_input_entry},
1467        {"eisa", SIZE_eisa_device_id, do_eisa_entry},
1468        {"parisc", SIZE_parisc_device_id, do_parisc_entry},
1469        {"sdio", SIZE_sdio_device_id, do_sdio_entry},
1470        {"ssb", SIZE_ssb_device_id, do_ssb_entry},
1471        {"bcma", SIZE_bcma_device_id, do_bcma_entry},
1472        {"virtio", SIZE_virtio_device_id, do_virtio_entry},
1473        {"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry},
1474        {"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry},
1475        {"i2c", SIZE_i2c_device_id, do_i2c_entry},
1476        {"i3c", SIZE_i3c_device_id, do_i3c_entry},
1477        {"spi", SIZE_spi_device_id, do_spi_entry},
1478        {"dmi", SIZE_dmi_system_id, do_dmi_entry},
1479        {"platform", SIZE_platform_device_id, do_platform_entry},
1480        {"mdio", SIZE_mdio_device_id, do_mdio_entry},
1481        {"zorro", SIZE_zorro_device_id, do_zorro_entry},
1482        {"isapnp", SIZE_isapnp_device_id, do_isapnp_entry},
1483        {"ipack", SIZE_ipack_device_id, do_ipack_entry},
1484        {"amba", SIZE_amba_id, do_amba_entry},
1485        {"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry},
1486        {"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry},
1487        {"cpu", SIZE_cpu_feature, do_cpu_entry},
1488        {"mei", SIZE_mei_cl_device_id, do_mei_entry},
1489        {"rapidio", SIZE_rio_device_id, do_rio_entry},
1490        {"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
1491        {"hdaudio", SIZE_hda_device_id, do_hda_entry},
1492        {"sdw", SIZE_sdw_device_id, do_sdw_entry},
1493        {"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry},
1494        {"tbsvc", SIZE_tb_service_id, do_tbsvc_entry},
1495        {"typec", SIZE_typec_device_id, do_typec_entry},
1496        {"tee", SIZE_tee_client_device_id, do_tee_entry},
1497        {"wmi", SIZE_wmi_device_id, do_wmi_entry},
1498        {"mhi", SIZE_mhi_device_id, do_mhi_entry},
1499        {"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry},
1500        {"ssam", SIZE_ssam_device_id, do_ssam_entry},
1501        {"dfl", SIZE_dfl_device_id, do_dfl_entry},
1502};
1503
1504/* Create MODULE_ALIAS() statements.
1505 * At this time, we cannot write the actual output C source yet,
1506 * so we write into the mod->dev_table_buf buffer. */
1507void handle_moddevtable(struct module *mod, struct elf_info *info,
1508                        Elf_Sym *sym, const char *symname)
1509{
1510        void *symval;
1511        char *zeros = NULL;
1512        const char *name, *identifier;
1513        unsigned int namelen;
1514
1515        /* We're looking for a section relative symbol */
1516        if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
1517                return;
1518
1519        /* We're looking for an object */
1520        if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
1521                return;
1522
1523        /* All our symbols are of form __mod_<name>__<identifier>_device_table. */
1524        if (strncmp(symname, "__mod_", strlen("__mod_")))
1525                return;
1526        name = symname + strlen("__mod_");
1527        namelen = strlen(name);
1528        if (namelen < strlen("_device_table"))
1529                return;
1530        if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
1531                return;
1532        identifier = strstr(name, "__");
1533        if (!identifier)
1534                return;
1535        namelen = identifier - name;
1536
1537        /* Handle all-NULL symbols allocated into .bss */
1538        if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
1539                zeros = calloc(1, sym->st_size);
1540                symval = zeros;
1541        } else {
1542                symval = (void *)info->hdr
1543                        + info->sechdrs[get_secindex(info, sym)].sh_offset
1544                        + sym->st_value;
1545        }
1546
1547        /* First handle the "special" cases */
1548        if (sym_is(name, namelen, "usb"))
1549                do_usb_table(symval, sym->st_size, mod);
1550        if (sym_is(name, namelen, "of"))
1551                do_of_table(symval, sym->st_size, mod);
1552        else if (sym_is(name, namelen, "pnp"))
1553                do_pnp_device_entry(symval, sym->st_size, mod);
1554        else if (sym_is(name, namelen, "pnp_card"))
1555                do_pnp_card_entries(symval, sym->st_size, mod);
1556        else {
1557                int i;
1558
1559                for (i = 0; i < ARRAY_SIZE(devtable); i++) {
1560                        const struct devtable *p = &devtable[i];
1561
1562                        if (sym_is(name, namelen, p->device_id)) {
1563                                do_table(symval, sym->st_size, p->id_size,
1564                                         p->device_id, p->do_entry, mod);
1565                                break;
1566                        }
1567                }
1568        }
1569        free(zeros);
1570}
1571
1572/* Now add out buffered information to the generated C source */
1573void add_moddevtable(struct buffer *buf, struct module *mod)
1574{
1575        buf_printf(buf, "\n");
1576        buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
1577        free(mod->dev_table_buf.p);
1578}
1579