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;
  37
  38/* UUID types for backward compatibility, don't use in new code */
  39typedef struct {
  40	__u8 b[16];
  41} guid_t;
  42
  43typedef struct {
  44	__u8 b[16];
  45} uuid_t;
  46
  47#define	UUID_STRING_LEN		36
  48
  49/* MEI UUID type, don't use anywhere else */
  50typedef struct {
  51	__u8 b[16];
  52} uuid_le;
  53
  54/* Big exception to the "don't include kernel headers into userspace, which
  55 * even potentially has different endianness and word sizes, since
  56 * we handle those differences explicitly below */
  57#include "../../include/linux/mod_devicetable.h"
  58
  59/* This array collects all instances that use the generic do_table */
  60struct devtable {
  61	const char *device_id; /* name of table, __mod_<name>__*_device_table. */
  62	unsigned long id_size;
  63	int (*do_entry)(const char *filename, void *symval, char *alias);
  64};
  65
  66/* Size of alias provided to do_entry functions */
  67#define ALIAS_SIZE 500
  68
  69/* Define a variable f that holds the value of field f of struct devid
  70 * based at address m.
  71 */
  72#define DEF_FIELD(m, devid, f) \
  73	typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))
  74
  75/* Define a variable v that holds the address of field f of struct devid
  76 * based at address m.  Due to the way typeof works, for a field of type
  77 * T[N] the variable has type T(*)[N], _not_ T*.
  78 */
  79#define DEF_FIELD_ADDR_VAR(m, devid, f, v) \
  80	typeof(((struct devid *)0)->f) *v = ((m) + OFF_##devid##_##f)
  81
  82/* Define a variable f that holds the address of field f of struct devid
  83 * based at address m.  Due to the way typeof works, for a field of type
  84 * T[N] the variable has type T(*)[N], _not_ T*.
  85 */
  86#define DEF_FIELD_ADDR(m, devid, f) \
  87	DEF_FIELD_ADDR_VAR(m, devid, f, f)
  88
  89#define ADD(str, sep, cond, field)                              \
  90do {                                                            \
  91        strcat(str, sep);                                       \
  92        if (cond)                                               \
  93                sprintf(str + strlen(str),                      \
  94                        sizeof(field) == 1 ? "%02X" :           \
  95                        sizeof(field) == 2 ? "%04X" :           \
  96                        sizeof(field) == 4 ? "%08X" : "",       \
  97                        field);                                 \
  98        else                                                    \
  99                sprintf(str + strlen(str), "*");                \
 100} while(0)
 101
 102/* End in a wildcard, for future extension */
 103static inline void add_wildcard(char *str)
 104{
 105	int len = strlen(str);
 106
 107	if (str[len - 1] != '*')
 108		strcat(str + len, "*");
 109}
 110
 111static inline void add_uuid(char *str, uuid_le uuid)
 112{
 113	int len = strlen(str);
 114
 115	sprintf(str + len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
 116		uuid.b[3], uuid.b[2], uuid.b[1], uuid.b[0],
 117		uuid.b[5], uuid.b[4], uuid.b[7], uuid.b[6],
 118		uuid.b[8], uuid.b[9], uuid.b[10], uuid.b[11],
 119		uuid.b[12], uuid.b[13], uuid.b[14], uuid.b[15]);
 120}
 121
 122static inline void add_guid(char *str, guid_t guid)
 123{
 124	int len = strlen(str);
 125
 126	sprintf(str + len, "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
 127		guid.b[3], guid.b[2], guid.b[1], guid.b[0],
 128		guid.b[5], guid.b[4], guid.b[7], guid.b[6],
 129		guid.b[8], guid.b[9], guid.b[10], guid.b[11],
 130		guid.b[12], guid.b[13], guid.b[14], guid.b[15]);
 131}
 132
 133/**
 134 * Check that sizeof(device_id type) are consistent with size of section
 135 * in .o file. If in-consistent then userspace and kernel does not agree
 136 * on actual size which is a bug.
 137 * Also verify that the final entry in the table is all zeros.
 138 * Ignore both checks if build host differ from target host and size differs.
 139 **/
 140static void device_id_check(const char *modname, const char *device_id,
 141			    unsigned long size, unsigned long id_size,
 142			    void *symval)
 143{
 144	int i;
 145
 146	if (size % id_size || size < id_size) {
 147		fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo of the size of section __mod_%s__<identifier>_device_table=%lu.\n"
 148		      "Fix definition of struct %s_device_id in mod_devicetable.h\n",
 149		      modname, device_id, id_size, device_id, size, device_id);
 150	}
 151	/* Verify last one is a terminator */
 152	for (i = 0; i < id_size; i++ ) {
 153		if (*(uint8_t*)(symval+size-id_size+i)) {
 154			fprintf(stderr,
 155				"%s: struct %s_device_id is %lu bytes.  The last of %lu is:\n",
 156				modname, device_id, id_size, size / id_size);
 157			for (i = 0; i < id_size; i++ )
 158				fprintf(stderr,"0x%02x ",
 159					*(uint8_t*)(symval+size-id_size+i) );
 160			fprintf(stderr,"\n");
 161			fatal("%s: struct %s_device_id is not terminated with a NULL entry!\n",
 162			      modname, device_id);
 163		}
 164	}
 165}
 166
 167/* USB is special because the bcdDevice can be matched against a numeric range */
 168/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */
 169static void do_usb_entry(void *symval,
 170			 unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
 171			 unsigned char range_lo, unsigned char range_hi,
 172			 unsigned char max, struct module *mod)
 173{
 174	char alias[500];
 175	DEF_FIELD(symval, usb_device_id, match_flags);
 176	DEF_FIELD(symval, usb_device_id, idVendor);
 177	DEF_FIELD(symval, usb_device_id, idProduct);
 178	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
 179	DEF_FIELD(symval, usb_device_id, bDeviceClass);
 180	DEF_FIELD(symval, usb_device_id, bDeviceSubClass);
 181	DEF_FIELD(symval, usb_device_id, bDeviceProtocol);
 182	DEF_FIELD(symval, usb_device_id, bInterfaceClass);
 183	DEF_FIELD(symval, usb_device_id, bInterfaceSubClass);
 184	DEF_FIELD(symval, usb_device_id, bInterfaceProtocol);
 185	DEF_FIELD(symval, usb_device_id, bInterfaceNumber);
 186
 187	strcpy(alias, "usb:");
 188	ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR,
 189	    idVendor);
 190	ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
 191	    idProduct);
 192
 193	strcat(alias, "d");
 194	if (bcdDevice_initial_digits)
 195		sprintf(alias + strlen(alias), "%0*X",
 196			bcdDevice_initial_digits, bcdDevice_initial);
 197	if (range_lo == range_hi)
 198		sprintf(alias + strlen(alias), "%X", range_lo);
 199	else if (range_lo > 0 || range_hi < max) {
 200		if (range_lo > 0x9 || range_hi < 0xA)
 201			sprintf(alias + strlen(alias),
 202				"[%X-%X]",
 203				range_lo,
 204				range_hi);
 205		else {
 206			sprintf(alias + strlen(alias),
 207				range_lo < 0x9 ? "[%X-9" : "[%X",
 208				range_lo);
 209			sprintf(alias + strlen(alias),
 210				range_hi > 0xA ? "A-%X]" : "%X]",
 211				range_hi);
 212		}
 213	}
 214	if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1))
 215		strcat(alias, "*");
 216
 217	ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
 218	    bDeviceClass);
 219	ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
 220	    bDeviceSubClass);
 221	ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
 222	    bDeviceProtocol);
 223	ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
 224	    bInterfaceClass);
 225	ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
 226	    bInterfaceSubClass);
 227	ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
 228	    bInterfaceProtocol);
 229	ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
 230	    bInterfaceNumber);
 231
 232	add_wildcard(alias);
 233	buf_printf(&mod->dev_table_buf,
 234		   "MODULE_ALIAS(\"%s\");\n", alias);
 235}
 236
 237/* Handles increment/decrement of BCD formatted integers */
 238/* Returns the previous value, so it works like i++ or i-- */
 239static unsigned int incbcd(unsigned int *bcd,
 240			   int inc,
 241			   unsigned char max,
 242			   size_t chars)
 243{
 244	unsigned int init = *bcd, i, j;
 245	unsigned long long c, dec = 0;
 246
 247	/* If bcd is not in BCD format, just increment */
 248	if (max > 0x9) {
 249		*bcd += inc;
 250		return init;
 251	}
 252
 253	/* Convert BCD to Decimal */
 254	for (i=0 ; i < chars ; i++) {
 255		c = (*bcd >> (i << 2)) & 0xf;
 256		c = c > 9 ? 9 : c; /* force to bcd just in case */
 257		for (j=0 ; j < i ; j++)
 258			c = c * 10;
 259		dec += c;
 260	}
 261
 262	/* Do our increment/decrement */
 263	dec += inc;
 264	*bcd  = 0;
 265
 266	/* Convert back to BCD */
 267	for (i=0 ; i < chars ; i++) {
 268		for (c=1,j=0 ; j < i ; j++)
 269			c = c * 10;
 270		c = (dec / c) % 10;
 271		*bcd += c << (i << 2);
 272	}
 273	return init;
 274}
 275
 276static void do_usb_entry_multi(void *symval, struct module *mod)
 277{
 278	unsigned int devlo, devhi;
 279	unsigned char chi, clo, max;
 280	int ndigits;
 281
 282	DEF_FIELD(symval, usb_device_id, match_flags);
 283	DEF_FIELD(symval, usb_device_id, idVendor);
 284	DEF_FIELD(symval, usb_device_id, idProduct);
 285	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
 286	DEF_FIELD(symval, usb_device_id, bcdDevice_hi);
 287	DEF_FIELD(symval, usb_device_id, bDeviceClass);
 288	DEF_FIELD(symval, usb_device_id, bInterfaceClass);
 289
 290	devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
 291		bcdDevice_lo : 0x0U;
 292	devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
 293		bcdDevice_hi : ~0x0U;
 294
 295	/* Figure out if this entry is in bcd or hex format */
 296	max = 0x9; /* Default to decimal format */
 297	for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) {
 298		clo = (devlo >> (ndigits << 2)) & 0xf;
 299		chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
 300		if (clo > max || chi > max) {
 301			max = 0xf;
 302			break;
 303		}
 304	}
 305
 306	/*
 307	 * Some modules (visor) have empty slots as placeholder for
 308	 * run-time specification that results in catch-all alias
 309	 */
 310	if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass))
 311		return;
 312
 313	/* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
 314	for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
 315		clo = devlo & 0xf;
 316		chi = devhi & 0xf;
 317		if (chi > max)	/* If we are in bcd mode, truncate if necessary */
 318			chi = max;
 319		devlo >>= 4;
 320		devhi >>= 4;
 321
 322		if (devlo == devhi || !ndigits) {
 323			do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod);
 324			break;
 325		}
 326
 327		if (clo > 0x0)
 328			do_usb_entry(symval,
 329				     incbcd(&devlo, 1, max,
 330					    sizeof(bcdDevice_lo) * 2),
 331				     ndigits, clo, max, max, mod);
 332
 333		if (chi < max)
 334			do_usb_entry(symval,
 335				     incbcd(&devhi, -1, max,
 336					    sizeof(bcdDevice_lo) * 2),
 337				     ndigits, 0x0, chi, max, mod);
 338	}
 339}
 340
 341static void do_usb_table(void *symval, unsigned long size,
 342			 struct module *mod)
 343{
 344	unsigned int i;
 345	const unsigned long id_size = SIZE_usb_device_id;
 346
 347	device_id_check(mod->name, "usb", size, id_size, symval);
 348
 349	/* Leave last one: it's the terminator. */
 350	size -= id_size;
 351
 352	for (i = 0; i < size; i += id_size)
 353		do_usb_entry_multi(symval + i, mod);
 354}
 355
 356static void do_of_entry_multi(void *symval, struct module *mod)
 357{
 358	char alias[500];
 359	int len;
 360	char *tmp;
 361
 362	DEF_FIELD_ADDR(symval, of_device_id, name);
 363	DEF_FIELD_ADDR(symval, of_device_id, type);
 364	DEF_FIELD_ADDR(symval, of_device_id, compatible);
 365
 366	len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*",
 367		      (*type)[0] ? *type : "*");
 368
 369	if ((*compatible)[0])
 370		sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "",
 371			*compatible);
 372
 373	/* Replace all whitespace with underscores */
 374	for (tmp = alias; tmp && *tmp; tmp++)
 375		if (isspace(*tmp))
 376			*tmp = '_';
 377
 378	buf_printf(&mod->dev_table_buf, "MODULE_ALIAS(\"%s\");\n", alias);
 379	strcat(alias, "C");
 380	add_wildcard(alias);
 381	buf_printf(&mod->dev_table_buf, "MODULE_ALIAS(\"%s\");\n", alias);
 382}
 383
 384static void do_of_table(void *symval, unsigned long size,
 385			struct module *mod)
 386{
 387	unsigned int i;
 388	const unsigned long id_size = SIZE_of_device_id;
 389
 390	device_id_check(mod->name, "of", size, id_size, symval);
 391
 392	/* Leave last one: it's the terminator. */
 393	size -= id_size;
 394
 395	for (i = 0; i < size; i += id_size)
 396		do_of_entry_multi(symval + i, mod);
 397}
 398
 399/* Looks like: hid:bNvNpN */
 400static int do_hid_entry(const char *filename,
 401			     void *symval, char *alias)
 402{
 403	DEF_FIELD(symval, hid_device_id, bus);
 404	DEF_FIELD(symval, hid_device_id, group);
 405	DEF_FIELD(symval, hid_device_id, vendor);
 406	DEF_FIELD(symval, hid_device_id, product);
 407
 408	sprintf(alias, "hid:");
 409	ADD(alias, "b", bus != HID_BUS_ANY, bus);
 410	ADD(alias, "g", group != HID_GROUP_ANY, group);
 411	ADD(alias, "v", vendor != HID_ANY_ID, vendor);
 412	ADD(alias, "p", product != HID_ANY_ID, product);
 413
 414	return 1;
 415}
 416
 417/* Looks like: ieee1394:venNmoNspNverN */
 418static int do_ieee1394_entry(const char *filename,
 419			     void *symval, char *alias)
 420{
 421	DEF_FIELD(symval, ieee1394_device_id, match_flags);
 422	DEF_FIELD(symval, ieee1394_device_id, vendor_id);
 423	DEF_FIELD(symval, ieee1394_device_id, model_id);
 424	DEF_FIELD(symval, ieee1394_device_id, specifier_id);
 425	DEF_FIELD(symval, ieee1394_device_id, version);
 426
 427	strcpy(alias, "ieee1394:");
 428	ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID,
 429	    vendor_id);
 430	ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID,
 431	    model_id);
 432	ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID,
 433	    specifier_id);
 434	ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION,
 435	    version);
 436
 437	add_wildcard(alias);
 438	return 1;
 439}
 440
 441/* Looks like: pci:vNdNsvNsdNbcNscNiN or <prefix>_pci:vNdNsvNsdNbcNscNiN. */
 442static int do_pci_entry(const char *filename,
 443			void *symval, char *alias)
 444{
 445	/* Class field can be divided into these three. */
 446	unsigned char baseclass, subclass, interface,
 447		baseclass_mask, subclass_mask, interface_mask;
 448
 449	DEF_FIELD(symval, pci_device_id, vendor);
 450	DEF_FIELD(symval, pci_device_id, device);
 451	DEF_FIELD(symval, pci_device_id, subvendor);
 452	DEF_FIELD(symval, pci_device_id, subdevice);
 453	DEF_FIELD(symval, pci_device_id, class);
 454	DEF_FIELD(symval, pci_device_id, class_mask);
 455	DEF_FIELD(symval, pci_device_id, override_only);
 456
 457	switch (override_only) {
 458	case 0:
 459		strcpy(alias, "pci:");
 460		break;
 461	case PCI_ID_F_VFIO_DRIVER_OVERRIDE:
 462		strcpy(alias, "vfio_pci:");
 463		break;
 464	default:
 465		warn("Unknown PCI driver_override alias %08X\n",
 466		     override_only);
 467		return 0;
 468	}
 469
 470	ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
 471	ADD(alias, "d", device != PCI_ANY_ID, device);
 472	ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
 473	ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);
 474
 475	baseclass = (class) >> 16;
 476	baseclass_mask = (class_mask) >> 16;
 477	subclass = (class) >> 8;
 478	subclass_mask = (class_mask) >> 8;
 479	interface = class;
 480	interface_mask = class_mask;
 481
 482	if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
 483	    || (subclass_mask != 0 && subclass_mask != 0xFF)
 484	    || (interface_mask != 0 && interface_mask != 0xFF)) {
 485		warn("Can't handle masks in %s:%04X\n",
 486		     filename, class_mask);
 487		return 0;
 488	}
 489
 490	ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
 491	ADD(alias, "sc", subclass_mask == 0xFF, subclass);
 492	ADD(alias, "i", interface_mask == 0xFF, interface);
 493	add_wildcard(alias);
 494	return 1;
 495}
 496
 497/* looks like: "ccw:tNmNdtNdmN" */
 498static int do_ccw_entry(const char *filename,
 499			void *symval, char *alias)
 500{
 501	DEF_FIELD(symval, ccw_device_id, match_flags);
 502	DEF_FIELD(symval, ccw_device_id, cu_type);
 503	DEF_FIELD(symval, ccw_device_id, cu_model);
 504	DEF_FIELD(symval, ccw_device_id, dev_type);
 505	DEF_FIELD(symval, ccw_device_id, dev_model);
 506
 507	strcpy(alias, "ccw:");
 508	ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
 509	    cu_type);
 510	ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
 511	    cu_model);
 512	ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
 513	    dev_type);
 514	ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
 515	    dev_model);
 516	add_wildcard(alias);
 517	return 1;
 518}
 519
 520/* looks like: "ap:tN" */
 521static int do_ap_entry(const char *filename,
 522		       void *symval, char *alias)
 523{
 524	DEF_FIELD(symval, ap_device_id, dev_type);
 525
 526	sprintf(alias, "ap:t%02X*", dev_type);
 527	return 1;
 528}
 529
 530/* looks like: "css:tN" */
 531static int do_css_entry(const char *filename,
 532			void *symval, char *alias)
 533{
 534	DEF_FIELD(symval, css_device_id, type);
 535
 536	sprintf(alias, "css:t%01X", type);
 537	return 1;
 538}
 539
 540/* Looks like: "serio:tyNprNidNexN" */
 541static int do_serio_entry(const char *filename,
 542			  void *symval, char *alias)
 543{
 544	DEF_FIELD(symval, serio_device_id, type);
 545	DEF_FIELD(symval, serio_device_id, proto);
 546	DEF_FIELD(symval, serio_device_id, id);
 547	DEF_FIELD(symval, serio_device_id, extra);
 548
 549	strcpy(alias, "serio:");
 550	ADD(alias, "ty", type != SERIO_ANY, type);
 551	ADD(alias, "pr", proto != SERIO_ANY, proto);
 552	ADD(alias, "id", id != SERIO_ANY, id);
 553	ADD(alias, "ex", extra != SERIO_ANY, extra);
 554
 555	add_wildcard(alias);
 556	return 1;
 557}
 558
 559/* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
 560 *             "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
 561 *
 562 * NOTE: Each driver should use one of the following : _HID, _CIDs
 563 *       or _CLS. Also, bb, ss, and pp can be substituted with ??
 564 *       as don't care byte.
 565 */
 566static int do_acpi_entry(const char *filename,
 567			void *symval, char *alias)
 568{
 569	DEF_FIELD_ADDR(symval, acpi_device_id, id);
 570	DEF_FIELD_ADDR(symval, acpi_device_id, cls);
 571	DEF_FIELD_ADDR(symval, acpi_device_id, cls_msk);
 572
 573	if (id && strlen((const char *)*id))
 574		sprintf(alias, "acpi*:%s:*", *id);
 575	else if (cls) {
 576		int i, byte_shift, cnt = 0;
 577		unsigned int msk;
 578
 579		sprintf(&alias[cnt], "acpi*:");
 580		cnt = 6;
 581		for (i = 1; i <= 3; i++) {
 582			byte_shift = 8 * (3-i);
 583			msk = (*cls_msk >> byte_shift) & 0xFF;
 584			if (msk)
 585				sprintf(&alias[cnt], "%02x",
 586					(*cls >> byte_shift) & 0xFF);
 587			else
 588				sprintf(&alias[cnt], "??");
 589			cnt += 2;
 590		}
 591		sprintf(&alias[cnt], ":*");
 592	}
 593	return 1;
 594}
 595
 596/* looks like: "pnp:dD" */
 597static void do_pnp_device_entry(void *symval, unsigned long size,
 598				struct module *mod)
 599{
 600	const unsigned long id_size = SIZE_pnp_device_id;
 601	const unsigned int count = (size / id_size)-1;
 602	unsigned int i;
 603
 604	device_id_check(mod->name, "pnp", size, id_size, symval);
 605
 606	for (i = 0; i < count; i++) {
 607		DEF_FIELD_ADDR(symval + i*id_size, pnp_device_id, id);
 608		char acpi_id[sizeof(*id)];
 609		int j;
 610
 611		buf_printf(&mod->dev_table_buf,
 612			   "MODULE_ALIAS(\"pnp:d%s*\");\n", *id);
 613
 614		/* fix broken pnp bus lowercasing */
 615		for (j = 0; j < sizeof(acpi_id); j++)
 616			acpi_id[j] = toupper((*id)[j]);
 617		buf_printf(&mod->dev_table_buf,
 618			   "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 619	}
 620}
 621
 622/* looks like: "pnp:dD" for every device of the card */
 623static void do_pnp_card_entries(void *symval, unsigned long size,
 624				struct module *mod)
 625{
 626	const unsigned long id_size = SIZE_pnp_card_device_id;
 627	const unsigned int count = (size / id_size)-1;
 628	unsigned int i;
 629
 630	device_id_check(mod->name, "pnp", size, id_size, symval);
 631
 632	for (i = 0; i < count; i++) {
 633		unsigned int j;
 634		DEF_FIELD_ADDR(symval + i * id_size, pnp_card_device_id, devs);
 635
 636		for (j = 0; j < PNP_MAX_DEVICES; j++) {
 637			const char *id = (char *)(*devs)[j].id;
 638			int i2, j2;
 639			int dup = 0;
 640
 641			if (!id[0])
 642				break;
 643
 644			/* find duplicate, already added value */
 645			for (i2 = 0; i2 < i && !dup; i2++) {
 646				DEF_FIELD_ADDR_VAR(symval + i2 * id_size,
 647						   pnp_card_device_id,
 648						   devs, devs_dup);
 649
 650				for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
 651					const char *id2 =
 652						(char *)(*devs_dup)[j2].id;
 653
 654					if (!id2[0])
 655						break;
 656
 657					if (!strcmp(id, id2)) {
 658						dup = 1;
 659						break;
 660					}
 661				}
 662			}
 663
 664			/* add an individual alias for every device entry */
 665			if (!dup) {
 666				char acpi_id[PNP_ID_LEN];
 667				int k;
 668
 669				buf_printf(&mod->dev_table_buf,
 670					   "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
 671
 672				/* fix broken pnp bus lowercasing */
 673				for (k = 0; k < sizeof(acpi_id); k++)
 674					acpi_id[k] = toupper(id[k]);
 675				buf_printf(&mod->dev_table_buf,
 676					   "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
 677			}
 678		}
 679	}
 680}
 681
 682/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
 683static int do_pcmcia_entry(const char *filename,
 684			   void *symval, char *alias)
 685{
 686	unsigned int i;
 687	DEF_FIELD(symval, pcmcia_device_id, match_flags);
 688	DEF_FIELD(symval, pcmcia_device_id, manf_id);
 689	DEF_FIELD(symval, pcmcia_device_id, card_id);
 690	DEF_FIELD(symval, pcmcia_device_id, func_id);
 691	DEF_FIELD(symval, pcmcia_device_id, function);
 692	DEF_FIELD(symval, pcmcia_device_id, device_no);
 693	DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
 694
 695	for (i=0; i<4; i++) {
 696		(*prod_id_hash)[i] = TO_NATIVE((*prod_id_hash)[i]);
 697	}
 698
 699	strcpy(alias, "pcmcia:");
 700	ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
 701	    manf_id);
 702	ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
 703	    card_id);
 704	ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
 705	    func_id);
 706	ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
 707	    function);
 708	ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
 709	    device_no);
 710	ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, (*prod_id_hash)[0]);
 711	ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, (*prod_id_hash)[1]);
 712	ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, (*prod_id_hash)[2]);
 713	ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, (*prod_id_hash)[3]);
 714
 715	add_wildcard(alias);
 716	return 1;
 717}
 718
 719static int do_vio_entry(const char *filename, void *symval,
 720		char *alias)
 721{
 722	char *tmp;
 723	DEF_FIELD_ADDR(symval, vio_device_id, type);
 724	DEF_FIELD_ADDR(symval, vio_device_id, compat);
 725
 726	sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
 727			(*compat)[0] ? *compat : "*");
 728
 729	/* Replace all whitespace with underscores */
 730	for (tmp = alias; tmp && *tmp; tmp++)
 731		if (isspace (*tmp))
 732			*tmp = '_';
 733
 734	add_wildcard(alias);
 735	return 1;
 736}
 737
 738static void do_input(char *alias,
 739		     kernel_ulong_t *arr, unsigned int min, unsigned int max)
 740{
 741	unsigned int i;
 742
 743	for (i = min / BITS_PER_LONG; i < max / BITS_PER_LONG + 1; i++)
 744		arr[i] = TO_NATIVE(arr[i]);
 745	for (i = min; i < max; i++)
 746		if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
 747			sprintf(alias + strlen(alias), "%X,*", i);
 748}
 749
 750/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
 751static int do_input_entry(const char *filename, void *symval,
 752			  char *alias)
 753{
 754	DEF_FIELD(symval, input_device_id, flags);
 755	DEF_FIELD(symval, input_device_id, bustype);
 756	DEF_FIELD(symval, input_device_id, vendor);
 757	DEF_FIELD(symval, input_device_id, product);
 758	DEF_FIELD(symval, input_device_id, version);
 759	DEF_FIELD_ADDR(symval, input_device_id, evbit);
 760	DEF_FIELD_ADDR(symval, input_device_id, keybit);
 761	DEF_FIELD_ADDR(symval, input_device_id, relbit);
 762	DEF_FIELD_ADDR(symval, input_device_id, absbit);
 763	DEF_FIELD_ADDR(symval, input_device_id, mscbit);
 764	DEF_FIELD_ADDR(symval, input_device_id, ledbit);
 765	DEF_FIELD_ADDR(symval, input_device_id, sndbit);
 766	DEF_FIELD_ADDR(symval, input_device_id, ffbit);
 767	DEF_FIELD_ADDR(symval, input_device_id, swbit);
 768
 769	sprintf(alias, "input:");
 770
 771	ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
 772	ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
 773	ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
 774	ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);
 775
 776	sprintf(alias + strlen(alias), "-e*");
 777	if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
 778		do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
 779	sprintf(alias + strlen(alias), "k*");
 780	if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
 781		do_input(alias, *keybit,
 782			 INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
 783			 INPUT_DEVICE_ID_KEY_MAX);
 784	sprintf(alias + strlen(alias), "r*");
 785	if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
 786		do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
 787	sprintf(alias + strlen(alias), "a*");
 788	if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
 789		do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
 790	sprintf(alias + strlen(alias), "m*");
 791	if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
 792		do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
 793	sprintf(alias + strlen(alias), "l*");
 794	if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
 795		do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
 796	sprintf(alias + strlen(alias), "s*");
 797	if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
 798		do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
 799	sprintf(alias + strlen(alias), "f*");
 800	if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
 801		do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
 802	sprintf(alias + strlen(alias), "w*");
 803	if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
 804		do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
 805	return 1;
 806}
 807
 808static int do_eisa_entry(const char *filename, void *symval,
 809		char *alias)
 810{
 811	DEF_FIELD_ADDR(symval, eisa_device_id, sig);
 812	if (sig[0])
 813		sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", *sig);
 814	else
 815		strcat(alias, "*");
 816	return 1;
 817}
 818
 819/* Looks like: parisc:tNhvNrevNsvN */
 820static int do_parisc_entry(const char *filename, void *symval,
 821		char *alias)
 822{
 823	DEF_FIELD(symval, parisc_device_id, hw_type);
 824	DEF_FIELD(symval, parisc_device_id, hversion);
 825	DEF_FIELD(symval, parisc_device_id, hversion_rev);
 826	DEF_FIELD(symval, parisc_device_id, sversion);
 827
 828	strcpy(alias, "parisc:");
 829	ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
 830	ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
 831	ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
 832	ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);
 833
 834	add_wildcard(alias);
 835	return 1;
 836}
 837
 838/* Looks like: sdio:cNvNdN. */
 839static int do_sdio_entry(const char *filename,
 840			void *symval, char *alias)
 841{
 842	DEF_FIELD(symval, sdio_device_id, class);
 843	DEF_FIELD(symval, sdio_device_id, vendor);
 844	DEF_FIELD(symval, sdio_device_id, device);
 845
 846	strcpy(alias, "sdio:");
 847	ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
 848	ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
 849	ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
 850	add_wildcard(alias);
 851	return 1;
 852}
 853
 854/* Looks like: ssb:vNidNrevN. */
 855static int do_ssb_entry(const char *filename,
 856			void *symval, char *alias)
 857{
 858	DEF_FIELD(symval, ssb_device_id, vendor);
 859	DEF_FIELD(symval, ssb_device_id, coreid);
 860	DEF_FIELD(symval, ssb_device_id, revision);
 861
 862	strcpy(alias, "ssb:");
 863	ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
 864	ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
 865	ADD(alias, "rev", revision != SSB_ANY_REV, revision);
 866	add_wildcard(alias);
 867	return 1;
 868}
 869
 870/* Looks like: bcma:mNidNrevNclN. */
 871static int do_bcma_entry(const char *filename,
 872			 void *symval, char *alias)
 873{
 874	DEF_FIELD(symval, bcma_device_id, manuf);
 875	DEF_FIELD(symval, bcma_device_id, id);
 876	DEF_FIELD(symval, bcma_device_id, rev);
 877	DEF_FIELD(symval, bcma_device_id, class);
 878
 879	strcpy(alias, "bcma:");
 880	ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
 881	ADD(alias, "id", id != BCMA_ANY_ID, id);
 882	ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
 883	ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
 884	add_wildcard(alias);
 885	return 1;
 886}
 887
 888/* Looks like: virtio:dNvN */
 889static int do_virtio_entry(const char *filename, void *symval,
 890			   char *alias)
 891{
 892	DEF_FIELD(symval, virtio_device_id, device);
 893	DEF_FIELD(symval, virtio_device_id, vendor);
 894
 895	strcpy(alias, "virtio:");
 896	ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
 897	ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
 898
 899	add_wildcard(alias);
 900	return 1;
 901}
 902
 903/*
 904 * Looks like: vmbus:guid
 905 * Each byte of the guid will be represented by two hex characters
 906 * in the name.
 907 */
 908
 909static int do_vmbus_entry(const char *filename, void *symval,
 910			  char *alias)
 911{
 912	int i;
 913	DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
 914	char guid_name[(sizeof(*guid) + 1) * 2];
 915
 916	for (i = 0; i < (sizeof(*guid) * 2); i += 2)
 917		sprintf(&guid_name[i], "%02x", TO_NATIVE((guid->b)[i/2]));
 918
 919	strcpy(alias, "vmbus:");
 920	strcat(alias, guid_name);
 921
 922	return 1;
 923}
 924
 925/* Looks like: rpmsg:S */
 926static int do_rpmsg_entry(const char *filename, void *symval,
 927			  char *alias)
 928{
 929	DEF_FIELD_ADDR(symval, rpmsg_device_id, name);
 930	sprintf(alias, RPMSG_DEVICE_MODALIAS_FMT, *name);
 931
 932	return 1;
 933}
 934
 935/* Looks like: i2c:S */
 936static int do_i2c_entry(const char *filename, void *symval,
 937			char *alias)
 938{
 939	DEF_FIELD_ADDR(symval, i2c_device_id, name);
 940	sprintf(alias, I2C_MODULE_PREFIX "%s", *name);
 941
 942	return 1;
 943}
 944
 945static int do_i3c_entry(const char *filename, void *symval,
 946			char *alias)
 947{
 948	DEF_FIELD(symval, i3c_device_id, match_flags);
 949	DEF_FIELD(symval, i3c_device_id, dcr);
 950	DEF_FIELD(symval, i3c_device_id, manuf_id);
 951	DEF_FIELD(symval, i3c_device_id, part_id);
 952	DEF_FIELD(symval, i3c_device_id, extra_info);
 953
 954	strcpy(alias, "i3c:");
 955	ADD(alias, "dcr", match_flags & I3C_MATCH_DCR, dcr);
 956	ADD(alias, "manuf", match_flags & I3C_MATCH_MANUF, manuf_id);
 957	ADD(alias, "part", match_flags & I3C_MATCH_PART, part_id);
 958	ADD(alias, "ext", match_flags & I3C_MATCH_EXTRA_INFO, extra_info);
 959
 960	return 1;
 961}
 962
 963/* Looks like: spi:S */
 964static int do_spi_entry(const char *filename, void *symval,
 965			char *alias)
 966{
 967	DEF_FIELD_ADDR(symval, spi_device_id, name);
 968	sprintf(alias, SPI_MODULE_PREFIX "%s", *name);
 969
 970	return 1;
 971}
 972
 973static const struct dmifield {
 974	const char *prefix;
 975	int field;
 976} dmi_fields[] = {
 977	{ "bvn", DMI_BIOS_VENDOR },
 978	{ "bvr", DMI_BIOS_VERSION },
 979	{ "bd",  DMI_BIOS_DATE },
 980	{ "br",  DMI_BIOS_RELEASE },
 981	{ "efr", DMI_EC_FIRMWARE_RELEASE },
 982	{ "svn", DMI_SYS_VENDOR },
 983	{ "pn",  DMI_PRODUCT_NAME },
 984	{ "pvr", DMI_PRODUCT_VERSION },
 985	{ "rvn", DMI_BOARD_VENDOR },
 986	{ "rn",  DMI_BOARD_NAME },
 987	{ "rvr", DMI_BOARD_VERSION },
 988	{ "cvn", DMI_CHASSIS_VENDOR },
 989	{ "ct",  DMI_CHASSIS_TYPE },
 990	{ "cvr", DMI_CHASSIS_VERSION },
 991	{ NULL,  DMI_NONE }
 992};
 993
 994static void dmi_ascii_filter(char *d, const char *s)
 995{
 996	/* Filter out characters we don't want to see in the modalias string */
 997	for (; *s; s++)
 998		if (*s > ' ' && *s < 127 && *s != ':')
 999			*(d++) = *s;
1000
1001	*d = 0;
1002}
1003
1004
1005static int do_dmi_entry(const char *filename, void *symval,
1006			char *alias)
1007{
1008	int i, j;
1009	DEF_FIELD_ADDR(symval, dmi_system_id, matches);
1010	sprintf(alias, "dmi*");
1011
1012	for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
1013		for (j = 0; j < 4; j++) {
1014			if ((*matches)[j].slot &&
1015			    (*matches)[j].slot == dmi_fields[i].field) {
1016				sprintf(alias + strlen(alias), ":%s*",
1017					dmi_fields[i].prefix);
1018				dmi_ascii_filter(alias + strlen(alias),
1019						 (*matches)[j].substr);
1020				strcat(alias, "*");
1021			}
1022		}
1023	}
1024
1025	strcat(alias, ":");
1026	return 1;
1027}
1028
1029static int do_platform_entry(const char *filename,
1030			     void *symval, char *alias)
1031{
1032	DEF_FIELD_ADDR(symval, platform_device_id, name);
1033	sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
1034	return 1;
1035}
1036
1037static int do_mdio_entry(const char *filename,
1038			 void *symval, char *alias)
1039{
1040	int i;
1041	DEF_FIELD(symval, mdio_device_id, phy_id);
1042	DEF_FIELD(symval, mdio_device_id, phy_id_mask);
1043
1044	alias += sprintf(alias, MDIO_MODULE_PREFIX);
1045
1046	for (i = 0; i < 32; i++) {
1047		if (!((phy_id_mask >> (31-i)) & 1))
1048			*(alias++) = '?';
1049		else if ((phy_id >> (31-i)) & 1)
1050			*(alias++) = '1';
1051		else
1052			*(alias++) = '0';
1053	}
1054
1055	/* Terminate the string */
1056	*alias = 0;
1057
1058	return 1;
1059}
1060
1061/* Looks like: zorro:iN. */
1062static int do_zorro_entry(const char *filename, void *symval,
1063			  char *alias)
1064{
1065	DEF_FIELD(symval, zorro_device_id, id);
1066	strcpy(alias, "zorro:");
1067	ADD(alias, "i", id != ZORRO_WILDCARD, id);
1068	return 1;
1069}
1070
1071/* looks like: "pnp:dD" */
1072static int do_isapnp_entry(const char *filename,
1073			   void *symval, char *alias)
1074{
1075	DEF_FIELD(symval, isapnp_device_id, vendor);
1076	DEF_FIELD(symval, isapnp_device_id, function);
1077	sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
1078		'A' + ((vendor >> 2) & 0x3f) - 1,
1079		'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
1080		'A' + ((vendor >> 8) & 0x1f) - 1,
1081		(function >> 4) & 0x0f, function & 0x0f,
1082		(function >> 12) & 0x0f, (function >> 8) & 0x0f);
1083	return 1;
1084}
1085
1086/* Looks like: "ipack:fNvNdN". */
1087static int do_ipack_entry(const char *filename,
1088			  void *symval, char *alias)
1089{
1090	DEF_FIELD(symval, ipack_device_id, format);
1091	DEF_FIELD(symval, ipack_device_id, vendor);
1092	DEF_FIELD(symval, ipack_device_id, device);
1093	strcpy(alias, "ipack:");
1094	ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
1095	ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
1096	ADD(alias, "d", device != IPACK_ANY_ID, device);
1097	add_wildcard(alias);
1098	return 1;
1099}
1100
1101/*
1102 * Append a match expression for a single masked hex digit.
1103 * outp points to a pointer to the character at which to append.
1104 *	*outp is updated on return to point just after the appended text,
1105 *	to facilitate further appending.
1106 */
1107static void append_nibble_mask(char **outp,
1108			       unsigned int nibble, unsigned int mask)
1109{
1110	char *p = *outp;
1111	unsigned int i;
1112
1113	switch (mask) {
1114	case 0:
1115		*p++ = '?';
1116		break;
1117
1118	case 0xf:
1119		p += sprintf(p, "%X",  nibble);
1120		break;
1121
1122	default:
1123		/*
1124		 * Dumbly emit a match pattern for all possible matching
1125		 * digits.  This could be improved in some cases using ranges,
1126		 * but it has the advantage of being trivially correct, and is
1127		 * often optimal.
1128		 */
1129		*p++ = '[';
1130		for (i = 0; i < 0x10; i++)
1131			if ((i & mask) == nibble)
1132				p += sprintf(p, "%X", i);
1133		*p++ = ']';
1134	}
1135
1136	/* Ensure that the string remains NUL-terminated: */
1137	*p = '\0';
1138
1139	/* Advance the caller's end-of-string pointer: */
1140	*outp = p;
1141}
1142
1143/*
1144 * looks like: "amba:dN"
1145 *
1146 * N is exactly 8 digits, where each is an upper-case hex digit, or
1147 *	a ? or [] pattern matching exactly one digit.
1148 */
1149static int do_amba_entry(const char *filename,
1150			 void *symval, char *alias)
1151{
1152	unsigned int digit;
1153	char *p = alias;
1154	DEF_FIELD(symval, amba_id, id);
1155	DEF_FIELD(symval, amba_id, mask);
1156
1157	if ((id & mask) != id)
1158		fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: id=0x%08X, mask=0x%08X.  Please fix this driver.\n",
1159		      filename, id, mask);
1160
1161	p += sprintf(alias, "amba:d");
1162	for (digit = 0; digit < 8; digit++)
1163		append_nibble_mask(&p,
1164				   (id >> (4 * (7 - digit))) & 0xf,
1165				   (mask >> (4 * (7 - digit))) & 0xf);
1166
1167	return 1;
1168}
1169
1170/*
1171 * looks like: "mipscdmm:tN"
1172 *
1173 * N is exactly 2 digits, where each is an upper-case hex digit, or
1174 *	a ? or [] pattern matching exactly one digit.
1175 */
1176static int do_mips_cdmm_entry(const char *filename,
1177			      void *symval, char *alias)
1178{
1179	DEF_FIELD(symval, mips_cdmm_device_id, type);
1180
1181	sprintf(alias, "mipscdmm:t%02X*", type);
1182	return 1;
1183}
1184
1185/* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
1186 * All fields are numbers. It would be nicer to use strings for vendor
1187 * and feature, but getting those out of the build system here is too
1188 * complicated.
1189 */
1190
1191static int do_x86cpu_entry(const char *filename, void *symval,
1192			   char *alias)
1193{
1194	DEF_FIELD(symval, x86_cpu_id, feature);
1195	DEF_FIELD(symval, x86_cpu_id, family);
1196	DEF_FIELD(symval, x86_cpu_id, model);
1197	DEF_FIELD(symval, x86_cpu_id, vendor);
1198
1199	strcpy(alias, "cpu:type:x86,");
1200	ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor);
1201	ADD(alias, "fam", family != X86_FAMILY_ANY, family);
1202	ADD(alias, "mod", model  != X86_MODEL_ANY,  model);
1203	strcat(alias, ":feature:*");
1204	if (feature != X86_FEATURE_ANY)
1205		sprintf(alias + strlen(alias), "%04X*", feature);
1206	return 1;
1207}
1208
1209/* LOOKS like cpu:type:*:feature:*FEAT* */
1210static int do_cpu_entry(const char *filename, void *symval, char *alias)
1211{
1212	DEF_FIELD(symval, cpu_feature, feature);
1213
1214	sprintf(alias, "cpu:type:*:feature:*%04X*", feature);
1215	return 1;
1216}
1217
1218/* Looks like: mei:S:uuid:N:* */
1219static int do_mei_entry(const char *filename, void *symval,
1220			char *alias)
1221{
1222	DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
1223	DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid);
1224	DEF_FIELD(symval, mei_cl_device_id, version);
1225
1226	sprintf(alias, MEI_CL_MODULE_PREFIX);
1227	sprintf(alias + strlen(alias), "%s:",  (*name)[0]  ? *name : "*");
1228	add_uuid(alias, *uuid);
1229	ADD(alias, ":", version != MEI_CL_VERSION_ANY, version);
1230
1231	strcat(alias, ":*");
1232
1233	return 1;
1234}
1235
1236/* Looks like: rapidio:vNdNavNadN */
1237static int do_rio_entry(const char *filename,
1238			void *symval, char *alias)
1239{
1240	DEF_FIELD(symval, rio_device_id, did);
1241	DEF_FIELD(symval, rio_device_id, vid);
1242	DEF_FIELD(symval, rio_device_id, asm_did);
1243	DEF_FIELD(symval, rio_device_id, asm_vid);
1244
1245	strcpy(alias, "rapidio:");
1246	ADD(alias, "v", vid != RIO_ANY_ID, vid);
1247	ADD(alias, "d", did != RIO_ANY_ID, did);
1248	ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
1249	ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
1250
1251	add_wildcard(alias);
1252	return 1;
1253}
1254
1255/* Looks like: ulpi:vNpN */
1256static int do_ulpi_entry(const char *filename, void *symval,
1257			 char *alias)
1258{
1259	DEF_FIELD(symval, ulpi_device_id, vendor);
1260	DEF_FIELD(symval, ulpi_device_id, product);
1261
1262	sprintf(alias, "ulpi:v%04xp%04x", vendor, product);
1263
1264	return 1;
1265}
1266
1267/* Looks like: hdaudio:vNrNaN */
1268static int do_hda_entry(const char *filename, void *symval, char *alias)
1269{
1270	DEF_FIELD(symval, hda_device_id, vendor_id);
1271	DEF_FIELD(symval, hda_device_id, rev_id);
1272	DEF_FIELD(symval, hda_device_id, api_version);
1273
1274	strcpy(alias, "hdaudio:");
1275	ADD(alias, "v", vendor_id != 0, vendor_id);
1276	ADD(alias, "r", rev_id != 0, rev_id);
1277	ADD(alias, "a", api_version != 0, api_version);
1278
1279	add_wildcard(alias);
1280	return 1;
1281}
1282
1283/* Looks like: sdw:mNpNvNcN */
1284static int do_sdw_entry(const char *filename, void *symval, char *alias)
1285{
1286	DEF_FIELD(symval, sdw_device_id, mfg_id);
1287	DEF_FIELD(symval, sdw_device_id, part_id);
1288	DEF_FIELD(symval, sdw_device_id, sdw_version);
1289	DEF_FIELD(symval, sdw_device_id, class_id);
1290
1291	strcpy(alias, "sdw:");
1292	ADD(alias, "m", mfg_id != 0, mfg_id);
1293	ADD(alias, "p", part_id != 0, part_id);
1294	ADD(alias, "v", sdw_version != 0, sdw_version);
1295	ADD(alias, "c", class_id != 0, class_id);
1296
1297	add_wildcard(alias);
1298	return 1;
1299}
1300
1301/* Looks like: fsl-mc:vNdN */
1302static int do_fsl_mc_entry(const char *filename, void *symval,
1303			   char *alias)
1304{
1305	DEF_FIELD(symval, fsl_mc_device_id, vendor);
1306	DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type);
1307
1308	sprintf(alias, "fsl-mc:v%08Xd%s", vendor, *obj_type);
1309	return 1;
1310}
1311
1312/* Looks like: tbsvc:kSpNvNrN */
1313static int do_tbsvc_entry(const char *filename, void *symval, char *alias)
1314{
1315	DEF_FIELD(symval, tb_service_id, match_flags);
1316	DEF_FIELD_ADDR(symval, tb_service_id, protocol_key);
1317	DEF_FIELD(symval, tb_service_id, protocol_id);
1318	DEF_FIELD(symval, tb_service_id, protocol_version);
1319	DEF_FIELD(symval, tb_service_id, protocol_revision);
1320
1321	strcpy(alias, "tbsvc:");
1322	if (match_flags & TBSVC_MATCH_PROTOCOL_KEY)
1323		sprintf(alias + strlen(alias), "k%s", *protocol_key);
1324	else
1325		strcat(alias + strlen(alias), "k*");
1326	ADD(alias, "p", match_flags & TBSVC_MATCH_PROTOCOL_ID, protocol_id);
1327	ADD(alias, "v", match_flags & TBSVC_MATCH_PROTOCOL_VERSION,
1328	    protocol_version);
1329	ADD(alias, "r", match_flags & TBSVC_MATCH_PROTOCOL_REVISION,
1330	    protocol_revision);
1331
1332	add_wildcard(alias);
1333	return 1;
1334}
1335
1336/* Looks like: typec:idNmN */
1337static int do_typec_entry(const char *filename, void *symval, char *alias)
1338{
1339	DEF_FIELD(symval, typec_device_id, svid);
1340	DEF_FIELD(symval, typec_device_id, mode);
1341
1342	sprintf(alias, "typec:id%04X", svid);
1343	ADD(alias, "m", mode != TYPEC_ANY_MODE, mode);
1344
1345	return 1;
1346}
1347
1348/* Looks like: tee:uuid */
1349static int do_tee_entry(const char *filename, void *symval, char *alias)
1350{
1351	DEF_FIELD(symval, tee_client_device_id, uuid);
1352
1353	sprintf(alias, "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
1354		uuid.b[0], uuid.b[1], uuid.b[2], uuid.b[3], uuid.b[4],
1355		uuid.b[5], uuid.b[6], uuid.b[7], uuid.b[8], uuid.b[9],
1356		uuid.b[10], uuid.b[11], uuid.b[12], uuid.b[13], uuid.b[14],
1357		uuid.b[15]);
1358
1359	add_wildcard(alias);
1360	return 1;
1361}
1362
1363/* Looks like: wmi:guid */
1364static int do_wmi_entry(const char *filename, void *symval, char *alias)
1365{
1366	int len;
1367	DEF_FIELD_ADDR(symval, wmi_device_id, guid_string);
1368
1369	if (strlen(*guid_string) != UUID_STRING_LEN) {
1370		warn("Invalid WMI device id 'wmi:%s' in '%s'\n",
1371				*guid_string, filename);
1372		return 0;
1373	}
1374
1375	len = snprintf(alias, ALIAS_SIZE, WMI_MODULE_PREFIX "%s", *guid_string);
1376	if (len < 0 || len >= ALIAS_SIZE) {
1377		warn("Could not generate all MODULE_ALIAS's in '%s'\n",
1378				filename);
1379		return 0;
1380	}
1381	return 1;
1382}
1383
1384/* Looks like: mhi:S */
1385static int do_mhi_entry(const char *filename, void *symval, char *alias)
1386{
1387	DEF_FIELD_ADDR(symval, mhi_device_id, chan);
1388	sprintf(alias, MHI_DEVICE_MODALIAS_FMT, *chan);
1389	return 1;
1390}
1391
1392/* Looks like: mhi_ep:S */
1393static int do_mhi_ep_entry(const char *filename, void *symval, char *alias)
1394{
1395	DEF_FIELD_ADDR(symval, mhi_device_id, chan);
1396	sprintf(alias, MHI_EP_DEVICE_MODALIAS_FMT, *chan);
1397
1398	return 1;
1399}
1400
1401/* Looks like: ishtp:{guid} */
1402static int do_ishtp_entry(const char *filename, void *symval, char *alias)
1403{
1404	DEF_FIELD(symval, ishtp_device_id, guid);
1405
1406	strcpy(alias, ISHTP_MODULE_PREFIX "{");
1407	add_guid(alias, guid);
1408	strcat(alias, "}");
1409
1410	return 1;
1411}
1412
1413static int do_auxiliary_entry(const char *filename, void *symval, char *alias)
1414{
1415	DEF_FIELD_ADDR(symval, auxiliary_device_id, name);
1416	sprintf(alias, AUXILIARY_MODULE_PREFIX "%s", *name);
1417
1418	return 1;
1419}
1420
1421/*
1422 * Looks like: ssam:dNcNtNiNfN
1423 *
1424 * N is exactly 2 digits, where each is an upper-case hex digit.
1425 */
1426static int do_ssam_entry(const char *filename, void *symval, char *alias)
1427{
1428	DEF_FIELD(symval, ssam_device_id, match_flags);
1429	DEF_FIELD(symval, ssam_device_id, domain);
1430	DEF_FIELD(symval, ssam_device_id, category);
1431	DEF_FIELD(symval, ssam_device_id, target);
1432	DEF_FIELD(symval, ssam_device_id, instance);
1433	DEF_FIELD(symval, ssam_device_id, function);
1434
1435	sprintf(alias, "ssam:d%02Xc%02X", domain, category);
1436	ADD(alias, "t", match_flags & SSAM_MATCH_TARGET, target);
1437	ADD(alias, "i", match_flags & SSAM_MATCH_INSTANCE, instance);
1438	ADD(alias, "f", match_flags & SSAM_MATCH_FUNCTION, function);
1439
1440	return 1;
1441}
1442
1443/* Looks like: dfl:tNfN */
1444static int do_dfl_entry(const char *filename, void *symval, char *alias)
1445{
1446	DEF_FIELD(symval, dfl_device_id, type);
1447	DEF_FIELD(symval, dfl_device_id, feature_id);
1448
1449	sprintf(alias, "dfl:t%04Xf%04X", type, feature_id);
1450
1451	add_wildcard(alias);
1452	return 1;
1453}
1454
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1455/* Does namelen bytes of name exactly match the symbol? */
1456static bool sym_is(const char *name, unsigned namelen, const char *symbol)
1457{
1458	if (namelen != strlen(symbol))
1459		return false;
1460
1461	return memcmp(name, symbol, namelen) == 0;
1462}
1463
1464static void do_table(void *symval, unsigned long size,
1465		     unsigned long id_size,
1466		     const char *device_id,
1467		     int (*do_entry)(const char *filename, void *symval, char *alias),
1468		     struct module *mod)
1469{
1470	unsigned int i;
1471	char alias[ALIAS_SIZE];
1472
1473	device_id_check(mod->name, device_id, size, id_size, symval);
1474	/* Leave last one: it's the terminator. */
1475	size -= id_size;
1476
1477	for (i = 0; i < size; i += id_size) {
1478		if (do_entry(mod->name, symval+i, alias)) {
1479			buf_printf(&mod->dev_table_buf,
1480				   "MODULE_ALIAS(\"%s\");\n", alias);
1481		}
1482	}
1483}
1484
1485static const struct devtable devtable[] = {
1486	{"hid", SIZE_hid_device_id, do_hid_entry},
1487	{"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry},
1488	{"pci", SIZE_pci_device_id, do_pci_entry},
1489	{"ccw", SIZE_ccw_device_id, do_ccw_entry},
1490	{"ap", SIZE_ap_device_id, do_ap_entry},
1491	{"css", SIZE_css_device_id, do_css_entry},
1492	{"serio", SIZE_serio_device_id, do_serio_entry},
1493	{"acpi", SIZE_acpi_device_id, do_acpi_entry},
1494	{"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry},
1495	{"vio", SIZE_vio_device_id, do_vio_entry},
1496	{"input", SIZE_input_device_id, do_input_entry},
1497	{"eisa", SIZE_eisa_device_id, do_eisa_entry},
1498	{"parisc", SIZE_parisc_device_id, do_parisc_entry},
1499	{"sdio", SIZE_sdio_device_id, do_sdio_entry},
1500	{"ssb", SIZE_ssb_device_id, do_ssb_entry},
1501	{"bcma", SIZE_bcma_device_id, do_bcma_entry},
1502	{"virtio", SIZE_virtio_device_id, do_virtio_entry},
1503	{"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry},
1504	{"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry},
1505	{"i2c", SIZE_i2c_device_id, do_i2c_entry},
1506	{"i3c", SIZE_i3c_device_id, do_i3c_entry},
1507	{"spi", SIZE_spi_device_id, do_spi_entry},
1508	{"dmi", SIZE_dmi_system_id, do_dmi_entry},
1509	{"platform", SIZE_platform_device_id, do_platform_entry},
1510	{"mdio", SIZE_mdio_device_id, do_mdio_entry},
1511	{"zorro", SIZE_zorro_device_id, do_zorro_entry},
1512	{"isapnp", SIZE_isapnp_device_id, do_isapnp_entry},
1513	{"ipack", SIZE_ipack_device_id, do_ipack_entry},
1514	{"amba", SIZE_amba_id, do_amba_entry},
1515	{"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry},
1516	{"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry},
1517	{"cpu", SIZE_cpu_feature, do_cpu_entry},
1518	{"mei", SIZE_mei_cl_device_id, do_mei_entry},
1519	{"rapidio", SIZE_rio_device_id, do_rio_entry},
1520	{"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
1521	{"hdaudio", SIZE_hda_device_id, do_hda_entry},
1522	{"sdw", SIZE_sdw_device_id, do_sdw_entry},
1523	{"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry},
1524	{"tbsvc", SIZE_tb_service_id, do_tbsvc_entry},
1525	{"typec", SIZE_typec_device_id, do_typec_entry},
1526	{"tee", SIZE_tee_client_device_id, do_tee_entry},
1527	{"wmi", SIZE_wmi_device_id, do_wmi_entry},
1528	{"mhi", SIZE_mhi_device_id, do_mhi_entry},
1529	{"mhi_ep", SIZE_mhi_device_id, do_mhi_ep_entry},
1530	{"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry},
1531	{"ssam", SIZE_ssam_device_id, do_ssam_entry},
1532	{"dfl", SIZE_dfl_device_id, do_dfl_entry},
1533	{"ishtp", SIZE_ishtp_device_id, do_ishtp_entry},
 
 
 
1534};
1535
1536/* Create MODULE_ALIAS() statements.
1537 * At this time, we cannot write the actual output C source yet,
1538 * so we write into the mod->dev_table_buf buffer. */
1539void handle_moddevtable(struct module *mod, struct elf_info *info,
1540			Elf_Sym *sym, const char *symname)
1541{
1542	void *symval;
1543	char *zeros = NULL;
1544	const char *name, *identifier;
1545	unsigned int namelen;
1546
1547	/* We're looking for a section relative symbol */
1548	if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
1549		return;
1550
1551	/* We're looking for an object */
1552	if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
1553		return;
1554
1555	/* All our symbols are of form __mod_<name>__<identifier>_device_table. */
1556	if (strncmp(symname, "__mod_", strlen("__mod_")))
1557		return;
1558	name = symname + strlen("__mod_");
1559	namelen = strlen(name);
1560	if (namelen < strlen("_device_table"))
1561		return;
1562	if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
1563		return;
1564	identifier = strstr(name, "__");
1565	if (!identifier)
1566		return;
1567	namelen = identifier - name;
1568
1569	/* Handle all-NULL symbols allocated into .bss */
1570	if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
1571		zeros = calloc(1, sym->st_size);
1572		symval = zeros;
1573	} else {
1574		symval = sym_get_data(info, sym);
1575	}
1576
1577	/* First handle the "special" cases */
1578	if (sym_is(name, namelen, "usb"))
1579		do_usb_table(symval, sym->st_size, mod);
1580	if (sym_is(name, namelen, "of"))
1581		do_of_table(symval, sym->st_size, mod);
1582	else if (sym_is(name, namelen, "pnp"))
1583		do_pnp_device_entry(symval, sym->st_size, mod);
1584	else if (sym_is(name, namelen, "pnp_card"))
1585		do_pnp_card_entries(symval, sym->st_size, mod);
1586	else {
1587		int i;
1588
1589		for (i = 0; i < ARRAY_SIZE(devtable); i++) {
1590			const struct devtable *p = &devtable[i];
1591
1592			if (sym_is(name, namelen, p->device_id)) {
1593				do_table(symval, sym->st_size, p->id_size,
1594					 p->device_id, p->do_entry, mod);
1595				break;
1596			}
1597		}
1598	}
1599	free(zeros);
1600}
1601
1602/* Now add out buffered information to the generated C source */
1603void add_moddevtable(struct buffer *buf, struct module *mod)
1604{
1605	buf_printf(buf, "\n");
1606	buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
1607	free(mod->dev_table_buf.p);
1608}