scripts/mod/file2alias.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
add_wildcard
add_uuid
device_id_check
do_usb_entry
incbcd
do_usb_entry_multi
do_usb_table
do_of_entry_multi
do_of_table
do_hid_entry
do_ieee1394_entry
do_pci_entry
do_ccw_entry
do_ap_entry
do_css_entry
do_serio_entry
do_acpi_entry
do_pnp_device_entry
do_pnp_card_entries
do_pcmcia_entry
do_vio_entry
do_input
do_input_entry
do_eisa_entry
do_parisc_entry
do_sdio_entry
do_ssb_entry
do_bcma_entry
do_virtio_entry
do_vmbus_entry
do_rpmsg_entry
do_i2c_entry
do_spi_entry
dmi_ascii_filter
do_dmi_entry
do_platform_entry
do_mdio_entry
do_zorro_entry
do_isapnp_entry
do_ipack_entry
append_nibble_mask
do_amba_entry
do_mips_cdmm_entry
do_x86cpu_entry
do_cpu_entry
do_mei_entry
do_rio_entry
do_ulpi_entry
do_hda_entry
do_sdw_entry
do_fsl_mc_entry
do_tbsvc_entry
do_typec_entry
do_tee_entry
do_wmi_entry
sym_is
do_table
handle_moddevtable
add_moddevtable
   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
  19 typedef Elf32_Addr      kernel_ulong_t;
  20 #define BITS_PER_LONG 32
  21 #else
  22 typedef 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 
  34 typedef uint32_t        __u32;
  35 typedef uint16_t        __u16;
  36 typedef unsigned char   __u8;
  37 typedef struct {
  38         __u8 b[16];
  39 } guid_t;
  40 
  41 /* backwards compatibility, don't use in new code */
  42 typedef struct {
  43         __u8 b[16];
  44 } uuid_le;
  45 typedef 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 */
  56 struct 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)                              \
  86 do {                                                            \
  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 */
  99 static inline void add_wildcard(char *str)
 100 {
 101         int len = strlen(str);
 102 
 103         if (str[len - 1] != '*')
 104                 strcat(str + len, "*");
 105 }
 106 
 107 static 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  **/
 125 static 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" */
 157 static 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-- */
 227 static 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 
 264 static 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 
 329 static 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 
 344 static 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 
 372 static 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 */
 388 static 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 */
 406 static 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. */
 430 static 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 
 444         strcpy(alias, "pci:");
 445         ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
 446         ADD(alias, "d", device != PCI_ANY_ID, device);
 447         ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
 448         ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);
 449 
 450         baseclass = (class) >> 16;
 451         baseclass_mask = (class_mask) >> 16;
 452         subclass = (class) >> 8;
 453         subclass_mask = (class_mask) >> 8;
 454         interface = class;
 455         interface_mask = class_mask;
 456 
 457         if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
 458             || (subclass_mask != 0 && subclass_mask != 0xFF)
 459             || (interface_mask != 0 && interface_mask != 0xFF)) {
 460                 warn("Can't handle masks in %s:%04X\n",
 461                      filename, class_mask);
 462                 return 0;
 463         }
 464 
 465         ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
 466         ADD(alias, "sc", subclass_mask == 0xFF, subclass);
 467         ADD(alias, "i", interface_mask == 0xFF, interface);
 468         add_wildcard(alias);
 469         return 1;
 470 }
 471 
 472 /* looks like: "ccw:tNmNdtNdmN" */
 473 static int do_ccw_entry(const char *filename,
 474                         void *symval, char *alias)
 475 {
 476         DEF_FIELD(symval, ccw_device_id, match_flags);
 477         DEF_FIELD(symval, ccw_device_id, cu_type);
 478         DEF_FIELD(symval, ccw_device_id, cu_model);
 479         DEF_FIELD(symval, ccw_device_id, dev_type);
 480         DEF_FIELD(symval, ccw_device_id, dev_model);
 481 
 482         strcpy(alias, "ccw:");
 483         ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
 484             cu_type);
 485         ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
 486             cu_model);
 487         ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
 488             dev_type);
 489         ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
 490             dev_model);
 491         add_wildcard(alias);
 492         return 1;
 493 }
 494 
 495 /* looks like: "ap:tN" */
 496 static int do_ap_entry(const char *filename,
 497                        void *symval, char *alias)
 498 {
 499         DEF_FIELD(symval, ap_device_id, dev_type);
 500 
 501         sprintf(alias, "ap:t%02X*", dev_type);
 502         return 1;
 503 }
 504 
 505 /* looks like: "css:tN" */
 506 static int do_css_entry(const char *filename,
 507                         void *symval, char *alias)
 508 {
 509         DEF_FIELD(symval, css_device_id, type);
 510 
 511         sprintf(alias, "css:t%01X", type);
 512         return 1;
 513 }
 514 
 515 /* Looks like: "serio:tyNprNidNexN" */
 516 static int do_serio_entry(const char *filename,
 517                           void *symval, char *alias)
 518 {
 519         DEF_FIELD(symval, serio_device_id, type);
 520         DEF_FIELD(symval, serio_device_id, proto);
 521         DEF_FIELD(symval, serio_device_id, id);
 522         DEF_FIELD(symval, serio_device_id, extra);
 523 
 524         strcpy(alias, "serio:");
 525         ADD(alias, "ty", type != SERIO_ANY, type);
 526         ADD(alias, "pr", proto != SERIO_ANY, proto);
 527         ADD(alias, "id", id != SERIO_ANY, id);
 528         ADD(alias, "ex", extra != SERIO_ANY, extra);
 529 
 530         add_wildcard(alias);
 531         return 1;
 532 }
 533 
 534 /* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
 535  *             "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
 536  *
 537  * NOTE: Each driver should use one of the following : _HID, _CIDs
 538  *       or _CLS. Also, bb, ss, and pp can be substituted with ??
 539  *       as don't care byte.
 540  */
 541 static int do_acpi_entry(const char *filename,
 542                         void *symval, char *alias)
 543 {
 544         DEF_FIELD_ADDR(symval, acpi_device_id, id);
 545         DEF_FIELD_ADDR(symval, acpi_device_id, cls);
 546         DEF_FIELD_ADDR(symval, acpi_device_id, cls_msk);
 547 
 548         if (id && strlen((const char *)*id))
 549                 sprintf(alias, "acpi*:%s:*", *id);
 550         else if (cls) {
 551                 int i, byte_shift, cnt = 0;
 552                 unsigned int msk;
 553 
 554                 sprintf(&alias[cnt], "acpi*:");
 555                 cnt = 6;
 556                 for (i = 1; i <= 3; i++) {
 557                         byte_shift = 8 * (3-i);
 558                         msk = (*cls_msk >> byte_shift) & 0xFF;
 559                         if (msk)
 560                                 sprintf(&alias[cnt], "%02x",
 561                                         (*cls >> byte_shift) & 0xFF);
 562                         else
 563                                 sprintf(&alias[cnt], "??");
 564                         cnt += 2;
 565                 }
 566                 sprintf(&alias[cnt], ":*");
 567         }
 568         return 1;
 569 }
 570 
 571 /* looks like: "pnp:dD" */
 572 static void do_pnp_device_entry(void *symval, unsigned long size,
 573                                 struct module *mod)
 574 {
 575         const unsigned long id_size = SIZE_pnp_device_id;
 576         const unsigned int count = (size / id_size)-1;
 577         unsigned int i;
 578 
 579         device_id_check(mod->name, "pnp", size, id_size, symval);
 580 
 581         for (i = 0; i < count; i++) {
 582                 DEF_FIELD_ADDR(symval + i*id_size, pnp_device_id, id);
 583                 char acpi_id[sizeof(*id)];
 584                 int j;
 585 
 586                 buf_printf(&mod->dev_table_buf,
 587                            "MODULE_ALIAS(\"pnp:d%s*\");\n", *id);
 588 
 589                 /* fix broken pnp bus lowercasing */
 590                 for (j = 0; j < sizeof(acpi_id); j++)
 591                         acpi_id[j] = toupper((*id)[j]);
 592                 buf_printf(&mod->dev_table_buf,
 593                            "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 594         }
 595 }
 596 
 597 /* looks like: "pnp:dD" for every device of the card */
 598 static void do_pnp_card_entries(void *symval, unsigned long size,
 599                                 struct module *mod)
 600 {
 601         const unsigned long id_size = SIZE_pnp_card_device_id;
 602         const unsigned int count = (size / id_size)-1;
 603         unsigned int i;
 604 
 605         device_id_check(mod->name, "pnp", size, id_size, symval);
 606 
 607         for (i = 0; i < count; i++) {
 608                 unsigned int j;
 609                 DEF_FIELD_ADDR(symval + i * id_size, pnp_card_device_id, devs);
 610 
 611                 for (j = 0; j < PNP_MAX_DEVICES; j++) {
 612                         const char *id = (char *)(*devs)[j].id;
 613                         int i2, j2;
 614                         int dup = 0;
 615 
 616                         if (!id[0])
 617                                 break;
 618 
 619                         /* find duplicate, already added value */
 620                         for (i2 = 0; i2 < i && !dup; i2++) {
 621                                 DEF_FIELD_ADDR_VAR(symval + i2 * id_size,
 622                                                    pnp_card_device_id,
 623                                                    devs, devs_dup);
 624 
 625                                 for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
 626                                         const char *id2 =
 627                                                 (char *)(*devs_dup)[j2].id;
 628 
 629                                         if (!id2[0])
 630                                                 break;
 631 
 632                                         if (!strcmp(id, id2)) {
 633                                                 dup = 1;
 634                                                 break;
 635                                         }
 636                                 }
 637                         }
 638 
 639                         /* add an individual alias for every device entry */
 640                         if (!dup) {
 641                                 char acpi_id[PNP_ID_LEN];
 642                                 int k;
 643 
 644                                 buf_printf(&mod->dev_table_buf,
 645                                            "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 646 
 647                                 /* fix broken pnp bus lowercasing */
 648                                 for (k = 0; k < sizeof(acpi_id); k++)
 649                                         acpi_id[k] = toupper(id[k]);
 650                                 buf_printf(&mod->dev_table_buf,
 651                                            "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 652                         }
 653                 }
 654         }
 655 }
 656 
 657 /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
 658 static int do_pcmcia_entry(const char *filename,
 659                            void *symval, char *alias)
 660 {
 661         unsigned int i;
 662         DEF_FIELD(symval, pcmcia_device_id, match_flags);
 663         DEF_FIELD(symval, pcmcia_device_id, manf_id);
 664         DEF_FIELD(symval, pcmcia_device_id, card_id);
 665         DEF_FIELD(symval, pcmcia_device_id, func_id);
 666         DEF_FIELD(symval, pcmcia_device_id, function);
 667         DEF_FIELD(symval, pcmcia_device_id, device_no);
 668         DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
 669 
 670         for (i=0; i<4; i++) {
 671                 (*prod_id_hash)[i] = TO_NATIVE((*prod_id_hash)[i]);
 672         }
 673 
 674         strcpy(alias, "pcmcia:");
 675         ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
 676             manf_id);
 677         ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
 678             card_id);
 679         ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
 680             func_id);
 681         ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
 682             function);
 683         ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
 684             device_no);
 685         ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, (*prod_id_hash)[0]);
 686         ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, (*prod_id_hash)[1]);
 687         ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, (*prod_id_hash)[2]);
 688         ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, (*prod_id_hash)[3]);
 689 
 690         add_wildcard(alias);
 691         return 1;
 692 }
 693 
 694 static int do_vio_entry(const char *filename, void *symval,
 695                 char *alias)
 696 {
 697         char *tmp;
 698         DEF_FIELD_ADDR(symval, vio_device_id, type);
 699         DEF_FIELD_ADDR(symval, vio_device_id, compat);
 700 
 701         sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
 702                         (*compat)[0] ? *compat : "*");
 703 
 704         /* Replace all whitespace with underscores */
 705         for (tmp = alias; tmp && *tmp; tmp++)
 706                 if (isspace (*tmp))
 707                         *tmp = '_';
 708 
 709         add_wildcard(alias);
 710         return 1;
 711 }
 712 
 713 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 714 
 715 static void do_input(char *alias,
 716                      kernel_ulong_t *arr, unsigned int min, unsigned int max)
 717 {
 718         unsigned int i;
 719 
 720         for (i = min / BITS_PER_LONG; i < max / BITS_PER_LONG + 1; i++)
 721                 arr[i] = TO_NATIVE(arr[i]);
 722         for (i = min; i < max; i++)
 723                 if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
 724                         sprintf(alias + strlen(alias), "%X,*", i);
 725 }
 726 
 727 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
 728 static int do_input_entry(const char *filename, void *symval,
 729                           char *alias)
 730 {
 731         DEF_FIELD(symval, input_device_id, flags);
 732         DEF_FIELD(symval, input_device_id, bustype);
 733         DEF_FIELD(symval, input_device_id, vendor);
 734         DEF_FIELD(symval, input_device_id, product);
 735         DEF_FIELD(symval, input_device_id, version);
 736         DEF_FIELD_ADDR(symval, input_device_id, evbit);
 737         DEF_FIELD_ADDR(symval, input_device_id, keybit);
 738         DEF_FIELD_ADDR(symval, input_device_id, relbit);
 739         DEF_FIELD_ADDR(symval, input_device_id, absbit);
 740         DEF_FIELD_ADDR(symval, input_device_id, mscbit);
 741         DEF_FIELD_ADDR(symval, input_device_id, ledbit);
 742         DEF_FIELD_ADDR(symval, input_device_id, sndbit);
 743         DEF_FIELD_ADDR(symval, input_device_id, ffbit);
 744         DEF_FIELD_ADDR(symval, input_device_id, swbit);
 745 
 746         sprintf(alias, "input:");
 747 
 748         ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
 749         ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
 750         ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
 751         ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);
 752 
 753         sprintf(alias + strlen(alias), "-e*");
 754         if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
 755                 do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
 756         sprintf(alias + strlen(alias), "k*");
 757         if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
 758                 do_input(alias, *keybit,
 759                          INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
 760                          INPUT_DEVICE_ID_KEY_MAX);
 761         sprintf(alias + strlen(alias), "r*");
 762         if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
 763                 do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
 764         sprintf(alias + strlen(alias), "a*");
 765         if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
 766                 do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
 767         sprintf(alias + strlen(alias), "m*");
 768         if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
 769                 do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
 770         sprintf(alias + strlen(alias), "l*");
 771         if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
 772                 do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
 773         sprintf(alias + strlen(alias), "s*");
 774         if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
 775                 do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
 776         sprintf(alias + strlen(alias), "f*");
 777         if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
 778                 do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
 779         sprintf(alias + strlen(alias), "w*");
 780         if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
 781                 do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
 782         return 1;
 783 }
 784 
 785 static int do_eisa_entry(const char *filename, void *symval,
 786                 char *alias)
 787 {
 788         DEF_FIELD_ADDR(symval, eisa_device_id, sig);
 789         if (sig[0])
 790                 sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", *sig);
 791         else
 792                 strcat(alias, "*");
 793         return 1;
 794 }
 795 
 796 /* Looks like: parisc:tNhvNrevNsvN */
 797 static int do_parisc_entry(const char *filename, void *symval,
 798                 char *alias)
 799 {
 800         DEF_FIELD(symval, parisc_device_id, hw_type);
 801         DEF_FIELD(symval, parisc_device_id, hversion);
 802         DEF_FIELD(symval, parisc_device_id, hversion_rev);
 803         DEF_FIELD(symval, parisc_device_id, sversion);
 804 
 805         strcpy(alias, "parisc:");
 806         ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
 807         ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
 808         ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
 809         ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);
 810 
 811         add_wildcard(alias);
 812         return 1;
 813 }
 814 
 815 /* Looks like: sdio:cNvNdN. */
 816 static int do_sdio_entry(const char *filename,
 817                         void *symval, char *alias)
 818 {
 819         DEF_FIELD(symval, sdio_device_id, class);
 820         DEF_FIELD(symval, sdio_device_id, vendor);
 821         DEF_FIELD(symval, sdio_device_id, device);
 822 
 823         strcpy(alias, "sdio:");
 824         ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
 825         ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
 826         ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
 827         add_wildcard(alias);
 828         return 1;
 829 }
 830 
 831 /* Looks like: ssb:vNidNrevN. */
 832 static int do_ssb_entry(const char *filename,
 833                         void *symval, char *alias)
 834 {
 835         DEF_FIELD(symval, ssb_device_id, vendor);
 836         DEF_FIELD(symval, ssb_device_id, coreid);
 837         DEF_FIELD(symval, ssb_device_id, revision);
 838 
 839         strcpy(alias, "ssb:");
 840         ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
 841         ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
 842         ADD(alias, "rev", revision != SSB_ANY_REV, revision);
 843         add_wildcard(alias);
 844         return 1;
 845 }
 846 
 847 /* Looks like: bcma:mNidNrevNclN. */
 848 static int do_bcma_entry(const char *filename,
 849                          void *symval, char *alias)
 850 {
 851         DEF_FIELD(symval, bcma_device_id, manuf);
 852         DEF_FIELD(symval, bcma_device_id, id);
 853         DEF_FIELD(symval, bcma_device_id, rev);
 854         DEF_FIELD(symval, bcma_device_id, class);
 855 
 856         strcpy(alias, "bcma:");
 857         ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
 858         ADD(alias, "id", id != BCMA_ANY_ID, id);
 859         ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
 860         ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
 861         add_wildcard(alias);
 862         return 1;
 863 }
 864 
 865 /* Looks like: virtio:dNvN */
 866 static int do_virtio_entry(const char *filename, void *symval,
 867                            char *alias)
 868 {
 869         DEF_FIELD(symval, virtio_device_id, device);
 870         DEF_FIELD(symval, virtio_device_id, vendor);
 871 
 872         strcpy(alias, "virtio:");
 873         ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
 874         ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
 875 
 876         add_wildcard(alias);
 877         return 1;
 878 }
 879 
 880 /*
 881  * Looks like: vmbus:guid
 882  * Each byte of the guid will be represented by two hex characters
 883  * in the name.
 884  */
 885 
 886 static int do_vmbus_entry(const char *filename, void *symval,
 887                           char *alias)
 888 {
 889         int i;
 890         DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
 891         char guid_name[(sizeof(*guid) + 1) * 2];
 892 
 893         for (i = 0; i < (sizeof(*guid) * 2); i += 2)
 894                 sprintf(&guid_name[i], "%02x", TO_NATIVE((guid->b)[i/2]));
 895 
 896         strcpy(alias, "vmbus:");
 897         strcat(alias, guid_name);
 898 
 899         return 1;
 900 }
 901 
 902 /* Looks like: rpmsg:S */
 903 static int do_rpmsg_entry(const char *filename, void *symval,
 904                           char *alias)
 905 {
 906         DEF_FIELD_ADDR(symval, rpmsg_device_id, name);
 907         sprintf(alias, RPMSG_DEVICE_MODALIAS_FMT, *name);
 908 
 909         return 1;
 910 }
 911 
 912 /* Looks like: i2c:S */
 913 static int do_i2c_entry(const char *filename, void *symval,
 914                         char *alias)
 915 {
 916         DEF_FIELD_ADDR(symval, i2c_device_id, name);
 917         sprintf(alias, I2C_MODULE_PREFIX "%s", *name);
 918 
 919         return 1;
 920 }
 921 
 922 /* Looks like: spi:S */
 923 static int do_spi_entry(const char *filename, void *symval,
 924                         char *alias)
 925 {
 926         DEF_FIELD_ADDR(symval, spi_device_id, name);
 927         sprintf(alias, SPI_MODULE_PREFIX "%s", *name);
 928 
 929         return 1;
 930 }
 931 
 932 static const struct dmifield {
 933         const char *prefix;
 934         int field;
 935 } dmi_fields[] = {
 936         { "bvn", DMI_BIOS_VENDOR },
 937         { "bvr", DMI_BIOS_VERSION },
 938         { "bd",  DMI_BIOS_DATE },
 939         { "svn", DMI_SYS_VENDOR },
 940         { "pn",  DMI_PRODUCT_NAME },
 941         { "pvr", DMI_PRODUCT_VERSION },
 942         { "rvn", DMI_BOARD_VENDOR },
 943         { "rn",  DMI_BOARD_NAME },
 944         { "rvr", DMI_BOARD_VERSION },
 945         { "cvn", DMI_CHASSIS_VENDOR },
 946         { "ct",  DMI_CHASSIS_TYPE },
 947         { "cvr", DMI_CHASSIS_VERSION },
 948         { NULL,  DMI_NONE }
 949 };
 950 
 951 static void dmi_ascii_filter(char *d, const char *s)
 952 {
 953         /* Filter out characters we don't want to see in the modalias string */
 954         for (; *s; s++)
 955                 if (*s > ' ' && *s < 127 && *s != ':')
 956                         *(d++) = *s;
 957 
 958         *d = 0;
 959 }
 960 
 961 
 962 static int do_dmi_entry(const char *filename, void *symval,
 963                         char *alias)
 964 {
 965         int i, j;
 966         DEF_FIELD_ADDR(symval, dmi_system_id, matches);
 967         sprintf(alias, "dmi*");
 968 
 969         for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
 970                 for (j = 0; j < 4; j++) {
 971                         if ((*matches)[j].slot &&
 972                             (*matches)[j].slot == dmi_fields[i].field) {
 973                                 sprintf(alias + strlen(alias), ":%s*",
 974                                         dmi_fields[i].prefix);
 975                                 dmi_ascii_filter(alias + strlen(alias),
 976                                                  (*matches)[j].substr);
 977                                 strcat(alias, "*");
 978                         }
 979                 }
 980         }
 981 
 982         strcat(alias, ":");
 983         return 1;
 984 }
 985 
 986 static int do_platform_entry(const char *filename,
 987                              void *symval, char *alias)
 988 {
 989         DEF_FIELD_ADDR(symval, platform_device_id, name);
 990         sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
 991         return 1;
 992 }
 993 
 994 static int do_mdio_entry(const char *filename,
 995                          void *symval, char *alias)
 996 {
 997         int i;
 998         DEF_FIELD(symval, mdio_device_id, phy_id);
 999         DEF_FIELD(symval, mdio_device_id, phy_id_mask);
1000 
1001         alias += sprintf(alias, MDIO_MODULE_PREFIX);
1002 
1003         for (i = 0; i < 32; i++) {
1004                 if (!((phy_id_mask >> (31-i)) & 1))
1005                         *(alias++) = '?';
1006                 else if ((phy_id >> (31-i)) & 1)
1007                         *(alias++) = '1';
1008                 else
1009                         *(alias++) = '0';
1010         }
1011 
1012         /* Terminate the string */
1013         *alias = 0;
1014 
1015         return 1;
1016 }
1017 
1018 /* Looks like: zorro:iN. */
1019 static int do_zorro_entry(const char *filename, void *symval,
1020                           char *alias)
1021 {
1022         DEF_FIELD(symval, zorro_device_id, id);
1023         strcpy(alias, "zorro:");
1024         ADD(alias, "i", id != ZORRO_WILDCARD, id);
1025         return 1;
1026 }
1027 
1028 /* looks like: "pnp:dD" */
1029 static int do_isapnp_entry(const char *filename,
1030                            void *symval, char *alias)
1031 {
1032         DEF_FIELD(symval, isapnp_device_id, vendor);
1033         DEF_FIELD(symval, isapnp_device_id, function);
1034         sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
1035                 'A' + ((vendor >> 2) & 0x3f) - 1,
1036                 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
1037                 'A' + ((vendor >> 8) & 0x1f) - 1,
1038                 (function >> 4) & 0x0f, function & 0x0f,
1039                 (function >> 12) & 0x0f, (function >> 8) & 0x0f);
1040         return 1;
1041 }
1042 
1043 /* Looks like: "ipack:fNvNdN". */
1044 static int do_ipack_entry(const char *filename,
1045                           void *symval, char *alias)
1046 {
1047         DEF_FIELD(symval, ipack_device_id, format);
1048         DEF_FIELD(symval, ipack_device_id, vendor);
1049         DEF_FIELD(symval, ipack_device_id, device);
1050         strcpy(alias, "ipack:");
1051         ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
1052         ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
1053         ADD(alias, "d", device != IPACK_ANY_ID, device);
1054         add_wildcard(alias);
1055         return 1;
1056 }
1057 
1058 /*
1059  * Append a match expression for a single masked hex digit.
1060  * outp points to a pointer to the character at which to append.
1061  *      *outp is updated on return to point just after the appended text,
1062  *      to facilitate further appending.
1063  */
1064 static void append_nibble_mask(char **outp,
1065                                unsigned int nibble, unsigned int mask)
1066 {
1067         char *p = *outp;
1068         unsigned int i;
1069 
1070         switch (mask) {
1071         case 0:
1072                 *p++ = '?';
1073                 break;
1074 
1075         case 0xf:
1076                 p += sprintf(p, "%X",  nibble);
1077                 break;
1078 
1079         default:
1080                 /*
1081                  * Dumbly emit a match pattern for all possible matching
1082                  * digits.  This could be improved in some cases using ranges,
1083                  * but it has the advantage of being trivially correct, and is
1084                  * often optimal.
1085                  */
1086                 *p++ = '[';
1087                 for (i = 0; i < 0x10; i++)
1088                         if ((i & mask) == nibble)
1089                                 p += sprintf(p, "%X", i);
1090                 *p++ = ']';
1091         }
1092 
1093         /* Ensure that the string remains NUL-terminated: */
1094         *p = '\0';
1095 
1096         /* Advance the caller's end-of-string pointer: */
1097         *outp = p;
1098 }
1099 
1100 /*
1101  * looks like: "amba:dN"
1102  *
1103  * N is exactly 8 digits, where each is an upper-case hex digit, or
1104  *      a ? or [] pattern matching exactly one digit.
1105  */
1106 static int do_amba_entry(const char *filename,
1107                          void *symval, char *alias)
1108 {
1109         unsigned int digit;
1110         char *p = alias;
1111         DEF_FIELD(symval, amba_id, id);
1112         DEF_FIELD(symval, amba_id, mask);
1113 
1114         if ((id & mask) != id)
1115                 fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: "
1116                       "id=0x%08X, mask=0x%08X.  Please fix this driver.\n",
1117                       filename, id, mask);
1118 
1119         p += sprintf(alias, "amba:d");
1120         for (digit = 0; digit < 8; digit++)
1121                 append_nibble_mask(&p,
1122                                    (id >> (4 * (7 - digit))) & 0xf,
1123                                    (mask >> (4 * (7 - digit))) & 0xf);
1124 
1125         return 1;
1126 }
1127 
1128 /*
1129  * looks like: "mipscdmm:tN"
1130  *
1131  * N is exactly 2 digits, where each is an upper-case hex digit, or
1132  *      a ? or [] pattern matching exactly one digit.
1133  */
1134 static int do_mips_cdmm_entry(const char *filename,
1135                               void *symval, char *alias)
1136 {
1137         DEF_FIELD(symval, mips_cdmm_device_id, type);
1138 
1139         sprintf(alias, "mipscdmm:t%02X*", type);
1140         return 1;
1141 }
1142 
1143 /* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
1144  * All fields are numbers. It would be nicer to use strings for vendor
1145  * and feature, but getting those out of the build system here is too
1146  * complicated.
1147  */
1148 
1149 static int do_x86cpu_entry(const char *filename, void *symval,
1150                            char *alias)
1151 {
1152         DEF_FIELD(symval, x86_cpu_id, feature);
1153         DEF_FIELD(symval, x86_cpu_id, family);
1154         DEF_FIELD(symval, x86_cpu_id, model);
1155         DEF_FIELD(symval, x86_cpu_id, vendor);
1156 
1157         strcpy(alias, "cpu:type:x86,");
1158         ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor);
1159         ADD(alias, "fam", family != X86_FAMILY_ANY, family);
1160         ADD(alias, "mod", model  != X86_MODEL_ANY,  model);
1161         strcat(alias, ":feature:*");
1162         if (feature != X86_FEATURE_ANY)
1163                 sprintf(alias + strlen(alias), "%04X*", feature);
1164         return 1;
1165 }
1166 
1167 /* LOOKS like cpu:type:*:feature:*FEAT* */
1168 static int do_cpu_entry(const char *filename, void *symval, char *alias)
1169 {
1170         DEF_FIELD(symval, cpu_feature, feature);
1171 
1172         sprintf(alias, "cpu:type:*:feature:*%04X*", feature);
1173         return 1;
1174 }
1175 
1176 /* Looks like: mei:S:uuid:N:* */
1177 static int do_mei_entry(const char *filename, void *symval,
1178                         char *alias)
1179 {
1180         DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
1181         DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid);
1182         DEF_FIELD(symval, mei_cl_device_id, version);
1183 
1184         sprintf(alias, MEI_CL_MODULE_PREFIX);
1185         sprintf(alias + strlen(alias), "%s:",  (*name)[0]  ? *name : "*");
1186         add_uuid(alias, *uuid);
1187         ADD(alias, ":", version != MEI_CL_VERSION_ANY, version);
1188 
1189         strcat(alias, ":*");
1190 
1191         return 1;
1192 }
1193 
1194 /* Looks like: rapidio:vNdNavNadN */
1195 static int do_rio_entry(const char *filename,
1196                         void *symval, char *alias)
1197 {
1198         DEF_FIELD(symval, rio_device_id, did);
1199         DEF_FIELD(symval, rio_device_id, vid);
1200         DEF_FIELD(symval, rio_device_id, asm_did);
1201         DEF_FIELD(symval, rio_device_id, asm_vid);
1202 
1203         strcpy(alias, "rapidio:");
1204         ADD(alias, "v", vid != RIO_ANY_ID, vid);
1205         ADD(alias, "d", did != RIO_ANY_ID, did);
1206         ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
1207         ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
1208 
1209         add_wildcard(alias);
1210         return 1;
1211 }
1212 
1213 /* Looks like: ulpi:vNpN */
1214 static int do_ulpi_entry(const char *filename, void *symval,
1215                          char *alias)
1216 {
1217         DEF_FIELD(symval, ulpi_device_id, vendor);
1218         DEF_FIELD(symval, ulpi_device_id, product);
1219 
1220         sprintf(alias, "ulpi:v%04xp%04x", vendor, product);
1221 
1222         return 1;
1223 }
1224 
1225 /* Looks like: hdaudio:vNrNaN */
1226 static int do_hda_entry(const char *filename, void *symval, char *alias)
1227 {
1228         DEF_FIELD(symval, hda_device_id, vendor_id);
1229         DEF_FIELD(symval, hda_device_id, rev_id);
1230         DEF_FIELD(symval, hda_device_id, api_version);
1231 
1232         strcpy(alias, "hdaudio:");
1233         ADD(alias, "v", vendor_id != 0, vendor_id);
1234         ADD(alias, "r", rev_id != 0, rev_id);
1235         ADD(alias, "a", api_version != 0, api_version);
1236 
1237         add_wildcard(alias);
1238         return 1;
1239 }
1240 
1241 /* Looks like: sdw:mNpN */
1242 static int do_sdw_entry(const char *filename, void *symval, char *alias)
1243 {
1244         DEF_FIELD(symval, sdw_device_id, mfg_id);
1245         DEF_FIELD(symval, sdw_device_id, part_id);
1246 
1247         strcpy(alias, "sdw:");
1248         ADD(alias, "m", mfg_id != 0, mfg_id);
1249         ADD(alias, "p", part_id != 0, part_id);
1250 
1251         add_wildcard(alias);
1252         return 1;
1253 }
1254 
1255 /* Looks like: fsl-mc:vNdN */
1256 static int do_fsl_mc_entry(const char *filename, void *symval,
1257                            char *alias)
1258 {
1259         DEF_FIELD(symval, fsl_mc_device_id, vendor);
1260         DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type);
1261 
1262         sprintf(alias, "fsl-mc:v%08Xd%s", vendor, *obj_type);
1263         return 1;
1264 }
1265 
1266 /* Looks like: tbsvc:kSpNvNrN */
1267 static int do_tbsvc_entry(const char *filename, void *symval, char *alias)
1268 {
1269         DEF_FIELD(symval, tb_service_id, match_flags);
1270         DEF_FIELD_ADDR(symval, tb_service_id, protocol_key);
1271         DEF_FIELD(symval, tb_service_id, protocol_id);
1272         DEF_FIELD(symval, tb_service_id, protocol_version);
1273         DEF_FIELD(symval, tb_service_id, protocol_revision);
1274 
1275         strcpy(alias, "tbsvc:");
1276         if (match_flags & TBSVC_MATCH_PROTOCOL_KEY)
1277                 sprintf(alias + strlen(alias), "k%s", *protocol_key);
1278         else
1279                 strcat(alias + strlen(alias), "k*");
1280         ADD(alias, "p", match_flags & TBSVC_MATCH_PROTOCOL_ID, protocol_id);
1281         ADD(alias, "v", match_flags & TBSVC_MATCH_PROTOCOL_VERSION,
1282             protocol_version);
1283         ADD(alias, "r", match_flags & TBSVC_MATCH_PROTOCOL_REVISION,
1284             protocol_revision);
1285 
1286         add_wildcard(alias);
1287         return 1;
1288 }
1289 
1290 /* Looks like: typec:idNmN */
1291 static int do_typec_entry(const char *filename, void *symval, char *alias)
1292 {
1293         DEF_FIELD(symval, typec_device_id, svid);
1294         DEF_FIELD(symval, typec_device_id, mode);
1295 
1296         sprintf(alias, "typec:id%04X", svid);
1297         ADD(alias, "m", mode != TYPEC_ANY_MODE, mode);
1298 
1299         return 1;
1300 }
1301 
1302 /* Looks like: tee:uuid */
1303 static int do_tee_entry(const char *filename, void *symval, char *alias)
1304 {
1305         DEF_FIELD(symval, tee_client_device_id, uuid);
1306 
1307         sprintf(alias, "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
1308                 uuid.b[0], uuid.b[1], uuid.b[2], uuid.b[3], uuid.b[4],
1309                 uuid.b[5], uuid.b[6], uuid.b[7], uuid.b[8], uuid.b[9],
1310                 uuid.b[10], uuid.b[11], uuid.b[12], uuid.b[13], uuid.b[14],
1311                 uuid.b[15]);
1312 
1313         add_wildcard(alias);
1314         return 1;
1315 }
1316 
1317 /* Looks like: wmi:guid */
1318 static int do_wmi_entry(const char *filename, void *symval, char *alias)
1319 {
1320         int len;
1321         DEF_FIELD_ADDR(symval, wmi_device_id, guid_string);
1322 
1323         if (strlen(*guid_string) != UUID_STRING_LEN) {
1324                 warn("Invalid WMI device id 'wmi:%s' in '%s'\n",
1325                                 *guid_string, filename);
1326                 return 0;
1327         }
1328 
1329         len = snprintf(alias, ALIAS_SIZE, WMI_MODULE_PREFIX "%s", *guid_string);
1330         if (len < 0 || len >= ALIAS_SIZE) {
1331                 warn("Could not generate all MODULE_ALIAS's in '%s'\n",
1332                                 filename);
1333                 return 0;
1334         }
1335         return 1;
1336 }
1337 
1338 /* Does namelen bytes of name exactly match the symbol? */
1339 static bool sym_is(const char *name, unsigned namelen, const char *symbol)
1340 {
1341         if (namelen != strlen(symbol))
1342                 return false;
1343 
1344         return memcmp(name, symbol, namelen) == 0;
1345 }
1346 
1347 static void do_table(void *symval, unsigned long size,
1348                      unsigned long id_size,
1349                      const char *device_id,
1350                      int (*do_entry)(const char *filename, void *symval, char *alias),
1351                      struct module *mod)
1352 {
1353         unsigned int i;
1354         char alias[ALIAS_SIZE];
1355 
1356         device_id_check(mod->name, device_id, size, id_size, symval);
1357         /* Leave last one: it's the terminator. */
1358         size -= id_size;
1359 
1360         for (i = 0; i < size; i += id_size) {
1361                 if (do_entry(mod->name, symval+i, alias)) {
1362                         buf_printf(&mod->dev_table_buf,
1363                                    "MODULE_ALIAS(\"%s\");\n", alias);
1364                 }
1365         }
1366 }
1367 
1368 static const struct devtable devtable[] = {
1369         {"hid", SIZE_hid_device_id, do_hid_entry},
1370         {"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry},
1371         {"pci", SIZE_pci_device_id, do_pci_entry},
1372         {"ccw", SIZE_ccw_device_id, do_ccw_entry},
1373         {"ap", SIZE_ap_device_id, do_ap_entry},
1374         {"css", SIZE_css_device_id, do_css_entry},
1375         {"serio", SIZE_serio_device_id, do_serio_entry},
1376         {"acpi", SIZE_acpi_device_id, do_acpi_entry},
1377         {"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry},
1378         {"vio", SIZE_vio_device_id, do_vio_entry},
1379         {"input", SIZE_input_device_id, do_input_entry},
1380         {"eisa", SIZE_eisa_device_id, do_eisa_entry},
1381         {"parisc", SIZE_parisc_device_id, do_parisc_entry},
1382         {"sdio", SIZE_sdio_device_id, do_sdio_entry},
1383         {"ssb", SIZE_ssb_device_id, do_ssb_entry},
1384         {"bcma", SIZE_bcma_device_id, do_bcma_entry},
1385         {"virtio", SIZE_virtio_device_id, do_virtio_entry},
1386         {"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry},
1387         {"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry},
1388         {"i2c", SIZE_i2c_device_id, do_i2c_entry},
1389         {"spi", SIZE_spi_device_id, do_spi_entry},
1390         {"dmi", SIZE_dmi_system_id, do_dmi_entry},
1391         {"platform", SIZE_platform_device_id, do_platform_entry},
1392         {"mdio", SIZE_mdio_device_id, do_mdio_entry},
1393         {"zorro", SIZE_zorro_device_id, do_zorro_entry},
1394         {"isapnp", SIZE_isapnp_device_id, do_isapnp_entry},
1395         {"ipack", SIZE_ipack_device_id, do_ipack_entry},
1396         {"amba", SIZE_amba_id, do_amba_entry},
1397         {"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry},
1398         {"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry},
1399         {"cpu", SIZE_cpu_feature, do_cpu_entry},
1400         {"mei", SIZE_mei_cl_device_id, do_mei_entry},
1401         {"rapidio", SIZE_rio_device_id, do_rio_entry},
1402         {"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
1403         {"hdaudio", SIZE_hda_device_id, do_hda_entry},
1404         {"sdw", SIZE_sdw_device_id, do_sdw_entry},
1405         {"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry},
1406         {"tbsvc", SIZE_tb_service_id, do_tbsvc_entry},
1407         {"typec", SIZE_typec_device_id, do_typec_entry},
1408         {"tee", SIZE_tee_client_device_id, do_tee_entry},
1409         {"wmi", SIZE_wmi_device_id, do_wmi_entry},
1410 };
1411 
1412 /* Create MODULE_ALIAS() statements.
1413  * At this time, we cannot write the actual output C source yet,
1414  * so we write into the mod->dev_table_buf buffer. */
1415 void handle_moddevtable(struct module *mod, struct elf_info *info,
1416                         Elf_Sym *sym, const char *symname)
1417 {
1418         void *symval;
1419         char *zeros = NULL;
1420         const char *name, *identifier;
1421         unsigned int namelen;
1422 
1423         /* We're looking for a section relative symbol */
1424         if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
1425                 return;
1426 
1427         /* We're looking for an object */
1428         if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
1429                 return;
1430 
1431         /* All our symbols are of form __mod_<name>__<identifier>_device_table. */
1432         if (strncmp(symname, "__mod_", strlen("__mod_")))
1433                 return;
1434         name = symname + strlen("__mod_");
1435         namelen = strlen(name);
1436         if (namelen < strlen("_device_table"))
1437                 return;
1438         if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
1439                 return;
1440         identifier = strstr(name, "__");
1441         if (!identifier)
1442                 return;
1443         namelen = identifier - name;
1444 
1445         /* Handle all-NULL symbols allocated into .bss */
1446         if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
1447                 zeros = calloc(1, sym->st_size);
1448                 symval = zeros;
1449         } else {
1450                 symval = (void *)info->hdr
1451                         + info->sechdrs[get_secindex(info, sym)].sh_offset
1452                         + sym->st_value;
1453         }
1454 
1455         /* First handle the "special" cases */
1456         if (sym_is(name, namelen, "usb"))
1457                 do_usb_table(symval, sym->st_size, mod);
1458         if (sym_is(name, namelen, "of"))
1459                 do_of_table(symval, sym->st_size, mod);
1460         else if (sym_is(name, namelen, "pnp"))
1461                 do_pnp_device_entry(symval, sym->st_size, mod);
1462         else if (sym_is(name, namelen, "pnp_card"))
1463                 do_pnp_card_entries(symval, sym->st_size, mod);
1464         else {
1465                 int i;
1466 
1467                 for (i = 0; i < ARRAY_SIZE(devtable); i++) {
1468                         const struct devtable *p = &devtable[i];
1469 
1470                         if (sym_is(name, namelen, p->device_id)) {
1471                                 do_table(symval, sym->st_size, p->id_size,
1472                                          p->device_id, p->do_entry, mod);
1473                                 break;
1474                         }
1475                 }
1476         }
1477         free(zeros);
1478 }
1479 
1480 /* Now add out buffered information to the generated C source */
1481 void add_moddevtable(struct buffer *buf, struct module *mod)
1482 {
1483         buf_printf(buf, "\n");
1484         buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
1485         free(mod->dev_table_buf.p);
1486 }
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root/scripts/mod/file2alias.c

DEFINITIONS
