file2alias.c

   1/* Simple code to turn various tables in an ELF file into alias definitions.
   2 * This deals with kernel datastructures where they should be
   3 * dealt with: in the kernel source.
   4 *
   5 * Copyright 2002-2003  Rusty Russell, IBM Corporation
   6 *           2003       Kai Germaschewski
   7 *
   8 *
   9 * This software may be used and distributed according to the terms
  10 * of the GNU General Public License, incorporated herein by reference.
  11 */
  12
  13#include <stdarg.h>
  14#include <stdio.h>
  15
  16#include "list.h"
  17#include "xalloc.h"
  18
  19#include "modpost.h"
  20#include "devicetable-offsets.h"
  21
  22/* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
  23 * use either stdint.h or inttypes.h for the rest. */
  24#if KERNEL_ELFCLASS == ELFCLASS32
  25typedef Elf32_Addr	kernel_ulong_t;
  26#define BITS_PER_LONG 32
  27#else
  28typedef Elf64_Addr	kernel_ulong_t;
  29#define BITS_PER_LONG 64
  30#endif
  31#ifdef __sun__
  32#include <inttypes.h>
  33#else
  34#include <stdint.h>
  35#endif
  36
  37#include <ctype.h>
  38#include <stdbool.h>
  39
  40/**
  41 * module_alias_printf - add auto-generated MODULE_ALIAS()
  42 *
  43 * @mod: module
  44 * @append_wildcard: append '*' for future extension if not exist yet
  45 * @fmt: printf(3)-like format
  46 */
  47static void __attribute__((format (printf, 3, 4)))
  48module_alias_printf(struct module *mod, bool append_wildcard,
  49		    const char *fmt, ...)
  50{
  51	struct module_alias *new, *als;
  52	size_t len;
  53	int n;
  54	va_list ap;
  55
  56	/* Determine required size. */
  57	va_start(ap, fmt);
  58	n = vsnprintf(NULL, 0, fmt, ap);
  59	va_end(ap);
  60
  61	if (n < 0) {
  62		error("vsnprintf failed\n");
  63		return;
  64	}
  65
  66	len = n + 1;	/* extra byte for '\0' */
  67
  68	if (append_wildcard)
  69		len++;	/* extra byte for '*' */
  70
  71	new = xmalloc(sizeof(*new) + len);
  72
  73	/* Now, really print it to the allocated buffer */
  74	va_start(ap, fmt);
  75	n = vsnprintf(new->str, len, fmt, ap);
  76	va_end(ap);
  77
  78	if (n < 0) {
  79		error("vsnprintf failed\n");
  80		free(new);
  81		return;
  82	}
  83
  84	if (append_wildcard && (n == 0 || new->str[n - 1] != '*')) {
  85		new->str[n] = '*';
  86		new->str[n + 1] = '\0';
  87	}
  88
  89	/* avoid duplication */
  90	list_for_each_entry(als, &mod->aliases, node) {
  91		if (!strcmp(als->str, new->str)) {
  92			free(new);
  93			return;
  94		}
  95	}
  96
  97	new->builtin_modname = NULL;
  98	list_add_tail(&new->node, &mod->aliases);
  99}
 100
 101typedef uint32_t	__u32;
 102typedef uint16_t	__u16;
 103typedef unsigned char	__u8;
 104
 105/* UUID types for backward compatibility, don't use in new code */
 106typedef struct {
 107	__u8 b[16];
 108} guid_t;
 109
 110typedef struct {
 111	__u8 b[16];
 112} uuid_t;
 113
 114#define	UUID_STRING_LEN		36
 115
 116/* MEI UUID type, don't use anywhere else */
 117typedef struct {
 118	__u8 b[16];
 119} uuid_le;
 120
 121/* Big exception to the "don't include kernel headers into userspace, which
 122 * even potentially has different endianness and word sizes, since
 123 * we handle those differences explicitly below */
 124#include "../../include/linux/mod_devicetable.h"
 125
 126struct devtable {
 127	const char *device_id;
 128	unsigned long id_size;
 129	void (*do_entry)(struct module *mod, void *symval);
 130};
 131
 132/* Define a variable f that holds the value of field f of struct devid
 133 * based at address m.
 134 */
 135#define DEF_FIELD(m, devid, f) \
 136	typeof(((struct devid *)0)->f) f = \
 137		get_unaligned_native((typeof(f) *)((m) + OFF_##devid##_##f))
 138
 139/* Define a variable f that holds the address of field f of struct devid
 140 * based at address m.  Due to the way typeof works, for a field of type
 141 * T[N] the variable has type T(*)[N], _not_ T*.
 142 */
 143#define DEF_FIELD_ADDR(m, devid, f) \
 144	typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f)
 145
 146#define ADD(str, sep, cond, field)                              \
 147do {                                                            \
 148        strcat(str, sep);                                       \
 149        if (cond)                                               \
 150                sprintf(str + strlen(str),                      \
 151                        sizeof(field) == 1 ? "%02X" :           \
 152                        sizeof(field) == 2 ? "%04X" :           \
 153                        sizeof(field) == 4 ? "%08X" : "",       \
 154                        field);                                 \
 155        else                                                    \
 156                sprintf(str + strlen(str), "*");                \
 157} while(0)
 158
 159static inline void add_uuid(char *str, uuid_le uuid)
 160{
 161	int len = strlen(str);
 162
 163	sprintf(str + len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
 164		uuid.b[3], uuid.b[2], uuid.b[1], uuid.b[0],
 165		uuid.b[5], uuid.b[4], uuid.b[7], uuid.b[6],
 166		uuid.b[8], uuid.b[9], uuid.b[10], uuid.b[11],
 167		uuid.b[12], uuid.b[13], uuid.b[14], uuid.b[15]);
 168}
 169
 170static inline void add_guid(char *str, guid_t guid)
 171{
 172	int len = strlen(str);
 173
 174	sprintf(str + len, "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
 175		guid.b[3], guid.b[2], guid.b[1], guid.b[0],
 176		guid.b[5], guid.b[4], guid.b[7], guid.b[6],
 177		guid.b[8], guid.b[9], guid.b[10], guid.b[11],
 178		guid.b[12], guid.b[13], guid.b[14], guid.b[15]);
 179}
 180
 181/* USB is special because the bcdDevice can be matched against a numeric range */
 182/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */
 183static void do_usb_entry(void *symval,
 184			 unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
 185			 unsigned char range_lo, unsigned char range_hi,
 186			 unsigned char max, struct module *mod)
 187{
 188	char alias[500];
 189	DEF_FIELD(symval, usb_device_id, match_flags);
 190	DEF_FIELD(symval, usb_device_id, idVendor);
 191	DEF_FIELD(symval, usb_device_id, idProduct);
 192	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
 193	DEF_FIELD(symval, usb_device_id, bDeviceClass);
 194	DEF_FIELD(symval, usb_device_id, bDeviceSubClass);
 195	DEF_FIELD(symval, usb_device_id, bDeviceProtocol);
 196	DEF_FIELD(symval, usb_device_id, bInterfaceClass);
 197	DEF_FIELD(symval, usb_device_id, bInterfaceSubClass);
 198	DEF_FIELD(symval, usb_device_id, bInterfaceProtocol);
 199	DEF_FIELD(symval, usb_device_id, bInterfaceNumber);
 200
 201	strcpy(alias, "usb:");
 202	ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR,
 203	    idVendor);
 204	ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
 205	    idProduct);
 206
 207	strcat(alias, "d");
 208	if (bcdDevice_initial_digits)
 209		sprintf(alias + strlen(alias), "%0*X",
 210			bcdDevice_initial_digits, bcdDevice_initial);
 211	if (range_lo == range_hi)
 212		sprintf(alias + strlen(alias), "%X", range_lo);
 213	else if (range_lo > 0 || range_hi < max) {
 214		if (range_lo > 0x9 || range_hi < 0xA)
 215			sprintf(alias + strlen(alias),
 216				"[%X-%X]",
 217				range_lo,
 218				range_hi);
 219		else {
 220			sprintf(alias + strlen(alias),
 221				range_lo < 0x9 ? "[%X-9" : "[%X",
 222				range_lo);
 223			sprintf(alias + strlen(alias),
 224				range_hi > 0xA ? "A-%X]" : "%X]",
 225				range_hi);
 226		}
 227	}
 228	if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1))
 229		strcat(alias, "*");
 230
 231	ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
 232	    bDeviceClass);
 233	ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
 234	    bDeviceSubClass);
 235	ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
 236	    bDeviceProtocol);
 237	ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
 238	    bInterfaceClass);
 239	ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
 240	    bInterfaceSubClass);
 241	ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
 242	    bInterfaceProtocol);
 243	ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
 244	    bInterfaceNumber);
 245
 246	module_alias_printf(mod, true, "%s", alias);
 247}
 248
 249/* Handles increment/decrement of BCD formatted integers */
 250/* Returns the previous value, so it works like i++ or i-- */
 251static unsigned int incbcd(unsigned int *bcd,
 252			   int inc,
 253			   unsigned char max,
 254			   size_t chars)
 255{
 256	unsigned int init = *bcd, i, j;
 257	unsigned long long c, dec = 0;
 258
 259	/* If bcd is not in BCD format, just increment */
 260	if (max > 0x9) {
 261		*bcd += inc;
 262		return init;
 263	}
 264
 265	/* Convert BCD to Decimal */
 266	for (i=0 ; i < chars ; i++) {
 267		c = (*bcd >> (i << 2)) & 0xf;
 268		c = c > 9 ? 9 : c; /* force to bcd just in case */
 269		for (j=0 ; j < i ; j++)
 270			c = c * 10;
 271		dec += c;
 272	}
 273
 274	/* Do our increment/decrement */
 275	dec += inc;
 276	*bcd  = 0;
 277
 278	/* Convert back to BCD */
 279	for (i=0 ; i < chars ; i++) {
 280		for (c=1,j=0 ; j < i ; j++)
 281			c = c * 10;
 282		c = (dec / c) % 10;
 283		*bcd += c << (i << 2);
 284	}
 285	return init;
 286}
 287
 288static void do_usb_entry_multi(struct module *mod, void *symval)
 289{
 290	unsigned int devlo, devhi;
 291	unsigned char chi, clo, max;
 292	int ndigits;
 293
 294	DEF_FIELD(symval, usb_device_id, match_flags);
 295	DEF_FIELD(symval, usb_device_id, idVendor);
 296	DEF_FIELD(symval, usb_device_id, idProduct);
 297	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
 298	DEF_FIELD(symval, usb_device_id, bcdDevice_hi);
 299	DEF_FIELD(symval, usb_device_id, bDeviceClass);
 300	DEF_FIELD(symval, usb_device_id, bInterfaceClass);
 301
 302	devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
 303		bcdDevice_lo : 0x0U;
 304	devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
 305		bcdDevice_hi : ~0x0U;
 306
 307	/* Figure out if this entry is in bcd or hex format */
 308	max = 0x9; /* Default to decimal format */
 309	for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) {
 310		clo = (devlo >> (ndigits << 2)) & 0xf;
 311		chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
 312		if (clo > max || chi > max) {
 313			max = 0xf;
 314			break;
 315		}
 316	}
 317
 318	/*
 319	 * Some modules (visor) have empty slots as placeholder for
 320	 * run-time specification that results in catch-all alias
 321	 */
 322	if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass))
 323		return;
 324
 325	/* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
 326	for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
 327		clo = devlo & 0xf;
 328		chi = devhi & 0xf;
 329		if (chi > max)	/* If we are in bcd mode, truncate if necessary */
 330			chi = max;
 331		devlo >>= 4;
 332		devhi >>= 4;
 333
 334		if (devlo == devhi || !ndigits) {
 335			do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod);
 336			break;
 337		}
 338
 339		if (clo > 0x0)
 340			do_usb_entry(symval,
 341				     incbcd(&devlo, 1, max,
 342					    sizeof(bcdDevice_lo) * 2),
 343				     ndigits, clo, max, max, mod);
 344
 345		if (chi < max)
 346			do_usb_entry(symval,
 347				     incbcd(&devhi, -1, max,
 348					    sizeof(bcdDevice_lo) * 2),
 349				     ndigits, 0x0, chi, max, mod);
 350	}
 351}
 352
 353static void do_of_entry(struct module *mod, void *symval)
 354{
 355	char alias[500];
 356	int len;
 357	char *tmp;
 358
 359	DEF_FIELD_ADDR(symval, of_device_id, name);
 360	DEF_FIELD_ADDR(symval, of_device_id, type);
 361	DEF_FIELD_ADDR(symval, of_device_id, compatible);
 362
 363	len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*",
 364		      (*type)[0] ? *type : "*");
 365
 366	if ((*compatible)[0])
 367		sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "",
 368			*compatible);
 369
 370	/* Replace all whitespace with underscores */
 371	for (tmp = alias; tmp && *tmp; tmp++)
 372		if (isspace(*tmp))
 373			*tmp = '_';
 374
 375	module_alias_printf(mod, false, "%s", alias);
 376	module_alias_printf(mod, false, "%sC*", alias);
 377}
 378
 379/* Looks like: hid:bNvNpN */
 380static void do_hid_entry(struct module *mod, void *symval)
 381{
 382	char alias[256] = {};
 383
 384	DEF_FIELD(symval, hid_device_id, bus);
 385	DEF_FIELD(symval, hid_device_id, group);
 386	DEF_FIELD(symval, hid_device_id, vendor);
 387	DEF_FIELD(symval, hid_device_id, product);
 388
 389	ADD(alias, "b", bus != HID_BUS_ANY, bus);
 390	ADD(alias, "g", group != HID_GROUP_ANY, group);
 391	ADD(alias, "v", vendor != HID_ANY_ID, vendor);
 392	ADD(alias, "p", product != HID_ANY_ID, product);
 393
 394	module_alias_printf(mod, false, "hid:%s", alias);
 395}
 396
 397/* Looks like: ieee1394:venNmoNspNverN */
 398static void do_ieee1394_entry(struct module *mod, void *symval)
 399{
 400	char alias[256] = {};
 401
 402	DEF_FIELD(symval, ieee1394_device_id, match_flags);
 403	DEF_FIELD(symval, ieee1394_device_id, vendor_id);
 404	DEF_FIELD(symval, ieee1394_device_id, model_id);
 405	DEF_FIELD(symval, ieee1394_device_id, specifier_id);
 406	DEF_FIELD(symval, ieee1394_device_id, version);
 407
 408	ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID,
 409	    vendor_id);
 410	ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID,
 411	    model_id);
 412	ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID,
 413	    specifier_id);
 414	ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION,
 415	    version);
 416
 417	module_alias_printf(mod, true, "ieee1394:%s", alias);
 418}
 419
 420/* Looks like: pci:vNdNsvNsdNbcNscNiN or <prefix>_pci:vNdNsvNsdNbcNscNiN. */
 421static void do_pci_entry(struct module *mod, void *symval)
 422{
 423	char alias[256];
 424	/* Class field can be divided into these three. */
 425	unsigned char baseclass, subclass, interface,
 426		baseclass_mask, subclass_mask, interface_mask;
 427
 428	DEF_FIELD(symval, pci_device_id, vendor);
 429	DEF_FIELD(symval, pci_device_id, device);
 430	DEF_FIELD(symval, pci_device_id, subvendor);
 431	DEF_FIELD(symval, pci_device_id, subdevice);
 432	DEF_FIELD(symval, pci_device_id, class);
 433	DEF_FIELD(symval, pci_device_id, class_mask);
 434	DEF_FIELD(symval, pci_device_id, override_only);
 435
 436	switch (override_only) {
 437	case 0:
 438		strcpy(alias, "pci:");
 439		break;
 440	case PCI_ID_F_VFIO_DRIVER_OVERRIDE:
 441		strcpy(alias, "vfio_pci:");
 442		break;
 443	default:
 444		warn("Unknown PCI driver_override alias %08X\n",
 445		     override_only);
 446	}
 447
 448	ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
 449	ADD(alias, "d", device != PCI_ANY_ID, device);
 450	ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
 451	ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);
 452
 453	baseclass = (class) >> 16;
 454	baseclass_mask = (class_mask) >> 16;
 455	subclass = (class) >> 8;
 456	subclass_mask = (class_mask) >> 8;
 457	interface = class;
 458	interface_mask = class_mask;
 459
 460	if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
 461	    || (subclass_mask != 0 && subclass_mask != 0xFF)
 462	    || (interface_mask != 0 && interface_mask != 0xFF)) {
 463		warn("Can't handle masks in %s:%04X\n",
 464		     mod->name, class_mask);
 465		return;
 466	}
 467
 468	ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
 469	ADD(alias, "sc", subclass_mask == 0xFF, subclass);
 470	ADD(alias, "i", interface_mask == 0xFF, interface);
 471
 472	module_alias_printf(mod, true, "%s", alias);
 473}
 474
 475/* looks like: "ccw:tNmNdtNdmN" */
 476static void do_ccw_entry(struct module *mod, void *symval)
 477{
 478	char alias[256] = {};
 479
 480	DEF_FIELD(symval, ccw_device_id, match_flags);
 481	DEF_FIELD(symval, ccw_device_id, cu_type);
 482	DEF_FIELD(symval, ccw_device_id, cu_model);
 483	DEF_FIELD(symval, ccw_device_id, dev_type);
 484	DEF_FIELD(symval, ccw_device_id, dev_model);
 485
 486	ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
 487	    cu_type);
 488	ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
 489	    cu_model);
 490	ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
 491	    dev_type);
 492	ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
 493	    dev_model);
 494
 495	module_alias_printf(mod, true, "ccw:%s", alias);
 496}
 497
 498/* looks like: "ap:tN" */
 499static void do_ap_entry(struct module *mod, void *symval)
 500{
 501	DEF_FIELD(symval, ap_device_id, dev_type);
 502
 503	module_alias_printf(mod, false, "ap:t%02X*", dev_type);
 504}
 505
 506/* looks like: "css:tN" */
 507static void do_css_entry(struct module *mod, void *symval)
 508{
 509	DEF_FIELD(symval, css_device_id, type);
 510
 511	module_alias_printf(mod, false, "css:t%01X", type);
 512}
 513
 514/* Looks like: "serio:tyNprNidNexN" */
 515static void do_serio_entry(struct module *mod, void *symval)
 516{
 517	char alias[256] = {};
 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	ADD(alias, "ty", type != SERIO_ANY, type);
 525	ADD(alias, "pr", proto != SERIO_ANY, proto);
 526	ADD(alias, "id", id != SERIO_ANY, id);
 527	ADD(alias, "ex", extra != SERIO_ANY, extra);
 528
 529	module_alias_printf(mod, true, "serio:%s", alias);
 530}
 531
 532/* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
 533 *             "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
 534 *
 535 * NOTE: Each driver should use one of the following : _HID, _CIDs
 536 *       or _CLS. Also, bb, ss, and pp can be substituted with ??
 537 *       as don't care byte.
 538 */
 539static void do_acpi_entry(struct module *mod, void *symval)
 540{
 541	DEF_FIELD_ADDR(symval, acpi_device_id, id);
 542	DEF_FIELD(symval, acpi_device_id, cls);
 543	DEF_FIELD(symval, acpi_device_id, cls_msk);
 544
 545	if ((*id)[0])
 546		module_alias_printf(mod, false, "acpi*:%s:*", *id);
 547	else {
 548		char alias[256];
 549		int i, byte_shift, cnt = 0;
 550		unsigned int msk;
 551
 552		for (i = 1; i <= 3; i++) {
 553			byte_shift = 8 * (3-i);
 554			msk = (cls_msk >> byte_shift) & 0xFF;
 555			if (msk)
 556				sprintf(&alias[cnt], "%02x",
 557					(cls >> byte_shift) & 0xFF);
 558			else
 559				sprintf(&alias[cnt], "??");
 560			cnt += 2;
 561		}
 562		module_alias_printf(mod, false, "acpi*:%s:*", alias);
 563	}
 564}
 565
 566/* looks like: "pnp:dD" */
 567static void do_pnp_device_entry(struct module *mod, void *symval)
 568{
 569	DEF_FIELD_ADDR(symval, pnp_device_id, id);
 570	char acpi_id[sizeof(*id)];
 571
 572	/* fix broken pnp bus lowercasing */
 573	for (unsigned int i = 0; i < sizeof(acpi_id); i++)
 574		acpi_id[i] = toupper((*id)[i]);
 575	module_alias_printf(mod, false, "pnp:d%s*", *id);
 576	module_alias_printf(mod, false, "acpi*:%s:*", acpi_id);
 577}
 578
 579/* looks like: "pnp:dD" for every device of the card */
 580static void do_pnp_card_entry(struct module *mod, void *symval)
 581{
 582	DEF_FIELD_ADDR(symval, pnp_card_device_id, devs);
 583
 584	for (unsigned int i = 0; i < PNP_MAX_DEVICES; i++) {
 585		const char *id = (char *)(*devs)[i].id;
 586		char acpi_id[PNP_ID_LEN];
 587
 588		if (!id[0])
 589			break;
 590
 591		/* fix broken pnp bus lowercasing */
 592		for (unsigned int j = 0; j < sizeof(acpi_id); j++)
 593			acpi_id[j] = toupper(id[j]);
 594
 595		/* add an individual alias for every device entry */
 596		module_alias_printf(mod, false, "pnp:d%s*", id);
 597		module_alias_printf(mod, false, "acpi*:%s:*", acpi_id);
 598	}
 599}
 600
 601/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
 602static void do_pcmcia_entry(struct module *mod, void *symval)
 603{
 604	char alias[256] = {};
 605
 606	DEF_FIELD(symval, pcmcia_device_id, match_flags);
 607	DEF_FIELD(symval, pcmcia_device_id, manf_id);
 608	DEF_FIELD(symval, pcmcia_device_id, card_id);
 609	DEF_FIELD(symval, pcmcia_device_id, func_id);
 610	DEF_FIELD(symval, pcmcia_device_id, function);
 611	DEF_FIELD(symval, pcmcia_device_id, device_no);
 612	DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
 613
 614	ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
 615	    manf_id);
 616	ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
 617	    card_id);
 618	ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
 619	    func_id);
 620	ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
 621	    function);
 622	ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
 623	    device_no);
 624	ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1,
 625	    get_unaligned_native(*prod_id_hash + 0));
 626	ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2,
 627	    get_unaligned_native(*prod_id_hash + 1));
 628	ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3,
 629	    get_unaligned_native(*prod_id_hash + 2));
 630	ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4,
 631	    get_unaligned_native(*prod_id_hash + 3));
 632
 633	module_alias_printf(mod, true, "pcmcia:%s", alias);
 634}
 635
 636static void do_vio_entry(struct module *mod, void *symval)
 637{
 638	char alias[256];
 639	char *tmp;
 640	DEF_FIELD_ADDR(symval, vio_device_id, type);
 641	DEF_FIELD_ADDR(symval, vio_device_id, compat);
 642
 643	sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
 644			(*compat)[0] ? *compat : "*");
 645
 646	/* Replace all whitespace with underscores */
 647	for (tmp = alias; tmp && *tmp; tmp++)
 648		if (isspace (*tmp))
 649			*tmp = '_';
 650
 651	module_alias_printf(mod, true, "%s", alias);
 652}
 653
 654static void do_input(char *alias,
 655		     kernel_ulong_t *arr, unsigned int min, unsigned int max)
 656{
 657	unsigned int i;
 658
 659	for (i = min; i <= max; i++)
 660		if (get_unaligned_native(arr + i / BITS_PER_LONG) &
 661		    (1ULL << (i % BITS_PER_LONG)))
 662			sprintf(alias + strlen(alias), "%X,*", i);
 663}
 664
 665/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
 666static void do_input_entry(struct module *mod, void *symval)
 667{
 668	char alias[256] = {};
 669
 670	DEF_FIELD(symval, input_device_id, flags);
 671	DEF_FIELD(symval, input_device_id, bustype);
 672	DEF_FIELD(symval, input_device_id, vendor);
 673	DEF_FIELD(symval, input_device_id, product);
 674	DEF_FIELD(symval, input_device_id, version);
 675	DEF_FIELD_ADDR(symval, input_device_id, evbit);
 676	DEF_FIELD_ADDR(symval, input_device_id, keybit);
 677	DEF_FIELD_ADDR(symval, input_device_id, relbit);
 678	DEF_FIELD_ADDR(symval, input_device_id, absbit);
 679	DEF_FIELD_ADDR(symval, input_device_id, mscbit);
 680	DEF_FIELD_ADDR(symval, input_device_id, ledbit);
 681	DEF_FIELD_ADDR(symval, input_device_id, sndbit);
 682	DEF_FIELD_ADDR(symval, input_device_id, ffbit);
 683	DEF_FIELD_ADDR(symval, input_device_id, swbit);
 684
 685	ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
 686	ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
 687	ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
 688	ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);
 689
 690	sprintf(alias + strlen(alias), "-e*");
 691	if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
 692		do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
 693	sprintf(alias + strlen(alias), "k*");
 694	if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
 695		do_input(alias, *keybit,
 696			 INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
 697			 INPUT_DEVICE_ID_KEY_MAX);
 698	sprintf(alias + strlen(alias), "r*");
 699	if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
 700		do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
 701	sprintf(alias + strlen(alias), "a*");
 702	if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
 703		do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
 704	sprintf(alias + strlen(alias), "m*");
 705	if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
 706		do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
 707	sprintf(alias + strlen(alias), "l*");
 708	if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
 709		do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
 710	sprintf(alias + strlen(alias), "s*");
 711	if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
 712		do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
 713	sprintf(alias + strlen(alias), "f*");
 714	if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
 715		do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
 716	sprintf(alias + strlen(alias), "w*");
 717	if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
 718		do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
 719
 720	module_alias_printf(mod, false, "input:%s", alias);
 721}
 722
 723static void do_eisa_entry(struct module *mod, void *symval)
 724{
 725	DEF_FIELD_ADDR(symval, eisa_device_id, sig);
 726	module_alias_printf(mod, false, EISA_DEVICE_MODALIAS_FMT "*", *sig);
 727}
 728
 729/* Looks like: parisc:tNhvNrevNsvN */
 730static void do_parisc_entry(struct module *mod, void *symval)
 731{
 732	char alias[256] = {};
 733
 734	DEF_FIELD(symval, parisc_device_id, hw_type);
 735	DEF_FIELD(symval, parisc_device_id, hversion);
 736	DEF_FIELD(symval, parisc_device_id, hversion_rev);
 737	DEF_FIELD(symval, parisc_device_id, sversion);
 738
 739	ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
 740	ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
 741	ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
 742	ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);
 743
 744	module_alias_printf(mod, true, "parisc:%s", alias);
 745}
 746
 747/* Looks like: sdio:cNvNdN. */
 748static void do_sdio_entry(struct module *mod, void *symval)
 749{
 750	char alias[256] = {};
 751
 752	DEF_FIELD(symval, sdio_device_id, class);
 753	DEF_FIELD(symval, sdio_device_id, vendor);
 754	DEF_FIELD(symval, sdio_device_id, device);
 755
 756	ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
 757	ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
 758	ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
 759
 760	module_alias_printf(mod, true, "sdio:%s", alias);
 761}
 762
 763/* Looks like: ssb:vNidNrevN. */
 764static void do_ssb_entry(struct module *mod, void *symval)
 765{
 766	char alias[256] = {};
 767
 768	DEF_FIELD(symval, ssb_device_id, vendor);
 769	DEF_FIELD(symval, ssb_device_id, coreid);
 770	DEF_FIELD(symval, ssb_device_id, revision);
 771
 772	ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
 773	ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
 774	ADD(alias, "rev", revision != SSB_ANY_REV, revision);
 775
 776	module_alias_printf(mod, true, "ssb:%s", alias);
 777}
 778
 779/* Looks like: bcma:mNidNrevNclN. */
 780static void do_bcma_entry(struct module *mod, void *symval)
 781{
 782	char alias[256] = {};
 783
 784	DEF_FIELD(symval, bcma_device_id, manuf);
 785	DEF_FIELD(symval, bcma_device_id, id);
 786	DEF_FIELD(symval, bcma_device_id, rev);
 787	DEF_FIELD(symval, bcma_device_id, class);
 788
 789	ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
 790	ADD(alias, "id", id != BCMA_ANY_ID, id);
 791	ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
 792	ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
 793
 794	module_alias_printf(mod, true, "bcma:%s", alias);
 795}
 796
 797/* Looks like: virtio:dNvN */
 798static void do_virtio_entry(struct module *mod, void *symval)
 799{
 800	char alias[256] = {};
 801
 802	DEF_FIELD(symval, virtio_device_id, device);
 803	DEF_FIELD(symval, virtio_device_id, vendor);
 804
 805	ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
 806	ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
 807
 808	module_alias_printf(mod, true, "virtio:%s", alias);
 809}
 810
 811/*
 812 * Looks like: vmbus:guid
 813 * Each byte of the guid will be represented by two hex characters
 814 * in the name.
 815 */
 816static void do_vmbus_entry(struct module *mod, void *symval)
 817{
 818	DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
 819	char guid_name[sizeof(*guid) * 2 + 1];
 820
 821	for (int i = 0; i < sizeof(*guid); i++)
 822		sprintf(&guid_name[i * 2], "%02x", guid->b[i]);
 823
 824	module_alias_printf(mod, false, "vmbus:%s", guid_name);
 825}
 826
 827/* Looks like: rpmsg:S */
 828static void do_rpmsg_entry(struct module *mod, void *symval)
 829{
 830	DEF_FIELD_ADDR(symval, rpmsg_device_id, name);
 831
 832	module_alias_printf(mod, false, RPMSG_DEVICE_MODALIAS_FMT, *name);
 833}
 834
 835/* Looks like: i2c:S */
 836static void do_i2c_entry(struct module *mod, void *symval)
 837{
 838	DEF_FIELD_ADDR(symval, i2c_device_id, name);
 839
 840	module_alias_printf(mod, false, I2C_MODULE_PREFIX "%s", *name);
 841}
 842
 843static void do_i3c_entry(struct module *mod, void *symval)
 844{
 845	char alias[256] = {};
 846
 847	DEF_FIELD(symval, i3c_device_id, match_flags);
 848	DEF_FIELD(symval, i3c_device_id, dcr);
 849	DEF_FIELD(symval, i3c_device_id, manuf_id);
 850	DEF_FIELD(symval, i3c_device_id, part_id);
 851	DEF_FIELD(symval, i3c_device_id, extra_info);
 852
 853	ADD(alias, "dcr", match_flags & I3C_MATCH_DCR, dcr);
 854	ADD(alias, "manuf", match_flags & I3C_MATCH_MANUF, manuf_id);
 855	ADD(alias, "part", match_flags & I3C_MATCH_PART, part_id);
 856	ADD(alias, "ext", match_flags & I3C_MATCH_EXTRA_INFO, extra_info);
 857
 858	module_alias_printf(mod, false, "i3c:%s", alias);
 859}
 860
 861static void do_slim_entry(struct module *mod, void *symval)
 862{
 863	DEF_FIELD(symval, slim_device_id, manf_id);
 864	DEF_FIELD(symval, slim_device_id, prod_code);
 865
 866	module_alias_printf(mod, false, "slim:%x:%x:*", manf_id, prod_code);
 867}
 868
 869/* Looks like: spi:S */
 870static void do_spi_entry(struct module *mod, void *symval)
 871{
 872	DEF_FIELD_ADDR(symval, spi_device_id, name);
 873
 874	module_alias_printf(mod, false, SPI_MODULE_PREFIX "%s", *name);
 875}
 876
 877static const struct dmifield {
 878	const char *prefix;
 879	int field;
 880} dmi_fields[] = {
 881	{ "bvn", DMI_BIOS_VENDOR },
 882	{ "bvr", DMI_BIOS_VERSION },
 883	{ "bd",  DMI_BIOS_DATE },
 884	{ "br",  DMI_BIOS_RELEASE },
 885	{ "efr", DMI_EC_FIRMWARE_RELEASE },
 886	{ "svn", DMI_SYS_VENDOR },
 887	{ "pn",  DMI_PRODUCT_NAME },
 888	{ "pvr", DMI_PRODUCT_VERSION },
 889	{ "rvn", DMI_BOARD_VENDOR },
 890	{ "rn",  DMI_BOARD_NAME },
 891	{ "rvr", DMI_BOARD_VERSION },
 892	{ "cvn", DMI_CHASSIS_VENDOR },
 893	{ "ct",  DMI_CHASSIS_TYPE },
 894	{ "cvr", DMI_CHASSIS_VERSION },
 895	{ NULL,  DMI_NONE }
 896};
 897
 898static void dmi_ascii_filter(char *d, const char *s)
 899{
 900	/* Filter out characters we don't want to see in the modalias string */
 901	for (; *s; s++)
 902		if (*s > ' ' && *s < 127 && *s != ':')
 903			*(d++) = *s;
 904
 905	*d = 0;
 906}
 907
 908
 909static void do_dmi_entry(struct module *mod, void *symval)
 910{
 911	char alias[256] = {};
 912	int i, j;
 913	DEF_FIELD_ADDR(symval, dmi_system_id, matches);
 914
 915	for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
 916		for (j = 0; j < 4; j++) {
 917			if ((*matches)[j].slot &&
 918			    (*matches)[j].slot == dmi_fields[i].field) {
 919				sprintf(alias + strlen(alias), ":%s*",
 920					dmi_fields[i].prefix);
 921				dmi_ascii_filter(alias + strlen(alias),
 922						 (*matches)[j].substr);
 923				strcat(alias, "*");
 924			}
 925		}
 926	}
 927
 928	module_alias_printf(mod, false, "dmi*%s:", alias);
 929}
 930
 931static void do_platform_entry(struct module *mod, void *symval)
 932{
 933	DEF_FIELD_ADDR(symval, platform_device_id, name);
 934
 935	module_alias_printf(mod, false, PLATFORM_MODULE_PREFIX "%s", *name);
 936}
 937
 938static void do_mdio_entry(struct module *mod, void *symval)
 939{
 940	char id[33];
 941	int i;
 942	DEF_FIELD(symval, mdio_device_id, phy_id);
 943	DEF_FIELD(symval, mdio_device_id, phy_id_mask);
 944
 945	for (i = 0; i < 32; i++) {
 946		if (!((phy_id_mask >> (31-i)) & 1))
 947			id[i] = '?';
 948		else if ((phy_id >> (31-i)) & 1)
 949			id[i] = '1';
 950		else
 951			id[i] = '0';
 952	}
 953
 954	/* Terminate the string */
 955	id[32] = '\0';
 956
 957	module_alias_printf(mod, false, MDIO_MODULE_PREFIX "%s", id);
 958}
 959
 960/* Looks like: zorro:iN. */
 961static void do_zorro_entry(struct module *mod, void *symval)
 962{
 963	char alias[256] = {};
 964	DEF_FIELD(symval, zorro_device_id, id);
 965
 966	ADD(alias, "i", id != ZORRO_WILDCARD, id);
 967
 968	module_alias_printf(mod, false, "zorro:%s", alias);
 969}
 970
 971/* looks like: "pnp:dD" */
 972static void do_isapnp_entry(struct module *mod, void *symval)
 973{
 974	DEF_FIELD(symval, isapnp_device_id, vendor);
 975	DEF_FIELD(symval, isapnp_device_id, function);
 976	module_alias_printf(mod, false, "pnp:d%c%c%c%x%x%x%x*",
 977		'A' + ((vendor >> 2) & 0x3f) - 1,
 978		'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
 979		'A' + ((vendor >> 8) & 0x1f) - 1,
 980		(function >> 4) & 0x0f, function & 0x0f,
 981		(function >> 12) & 0x0f, (function >> 8) & 0x0f);
 982}
 983
 984/* Looks like: "ipack:fNvNdN". */
 985static void do_ipack_entry(struct module *mod, void *symval)
 986{
 987	char alias[256] = {};
 988	DEF_FIELD(symval, ipack_device_id, format);
 989	DEF_FIELD(symval, ipack_device_id, vendor);
 990	DEF_FIELD(symval, ipack_device_id, device);
 991
 992	ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
 993	ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
 994	ADD(alias, "d", device != IPACK_ANY_ID, device);
 995
 996	module_alias_printf(mod, true, "ipack:%s", alias);
 997}
 998
 999/*
1000 * Append a match expression for a single masked hex digit.
1001 * outp points to a pointer to the character at which to append.
1002 *	*outp is updated on return to point just after the appended text,
1003 *	to facilitate further appending.
1004 */
1005static void append_nibble_mask(char **outp,
1006			       unsigned int nibble, unsigned int mask)
1007{
1008	char *p = *outp;
1009	unsigned int i;
1010
1011	switch (mask) {
1012	case 0:
1013		*p++ = '?';
1014		break;
1015
1016	case 0xf:
1017		p += sprintf(p, "%X",  nibble);
1018		break;
1019
1020	default:
1021		/*
1022		 * Dumbly emit a match pattern for all possible matching
1023		 * digits.  This could be improved in some cases using ranges,
1024		 * but it has the advantage of being trivially correct, and is
1025		 * often optimal.
1026		 */
1027		*p++ = '[';
1028		for (i = 0; i < 0x10; i++)
1029			if ((i & mask) == nibble)
1030				p += sprintf(p, "%X", i);
1031		*p++ = ']';
1032	}
1033
1034	/* Ensure that the string remains NUL-terminated: */
1035	*p = '\0';
1036
1037	/* Advance the caller's end-of-string pointer: */
1038	*outp = p;
1039}
1040
1041/*
1042 * looks like: "amba:dN"
1043 *
1044 * N is exactly 8 digits, where each is an upper-case hex digit, or
1045 *	a ? or [] pattern matching exactly one digit.
1046 */
1047static void do_amba_entry(struct module *mod, void *symval)
1048{
1049	char alias[256];
1050	unsigned int digit;
1051	char *p = alias;
1052	DEF_FIELD(symval, amba_id, id);
1053	DEF_FIELD(symval, amba_id, mask);
1054
1055	if ((id & mask) != id)
1056		fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: id=0x%08X, mask=0x%08X.  Please fix this driver.\n",
1057		      mod->name, id, mask);
1058
1059	for (digit = 0; digit < 8; digit++)
1060		append_nibble_mask(&p,
1061				   (id >> (4 * (7 - digit))) & 0xf,
1062				   (mask >> (4 * (7 - digit))) & 0xf);
1063
1064	module_alias_printf(mod, false, "amba:d%s", alias);
1065}
1066
1067/*
1068 * looks like: "mipscdmm:tN"
1069 *
1070 * N is exactly 2 digits, where each is an upper-case hex digit, or
1071 *	a ? or [] pattern matching exactly one digit.
1072 */
1073static void do_mips_cdmm_entry(struct module *mod, void *symval)
1074{
1075	DEF_FIELD(symval, mips_cdmm_device_id, type);
1076
1077	module_alias_printf(mod, false, "mipscdmm:t%02X*", type);
1078}
1079
1080/* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
1081 * All fields are numbers. It would be nicer to use strings for vendor
1082 * and feature, but getting those out of the build system here is too
1083 * complicated.
1084 */
1085
1086static void do_x86cpu_entry(struct module *mod, void *symval)
1087{
1088	char alias[256] = {};
1089
1090	DEF_FIELD(symval, x86_cpu_id, feature);
1091	DEF_FIELD(symval, x86_cpu_id, family);
1092	DEF_FIELD(symval, x86_cpu_id, model);
1093	DEF_FIELD(symval, x86_cpu_id, vendor);
1094
1095	ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor);
1096	ADD(alias, "fam", family != X86_FAMILY_ANY, family);
1097	ADD(alias, "mod", model  != X86_MODEL_ANY,  model);
1098	strcat(alias, ":feature:*");
1099	if (feature != X86_FEATURE_ANY)
1100		sprintf(alias + strlen(alias), "%04X*", feature);
1101
1102	module_alias_printf(mod, false, "cpu:type:x86,%s", alias);
1103}
1104
1105/* LOOKS like cpu:type:*:feature:*FEAT* */
1106static void do_cpu_entry(struct module *mod, void *symval)
1107{
1108	DEF_FIELD(symval, cpu_feature, feature);
1109
1110	module_alias_printf(mod, false, "cpu:type:*:feature:*%04X*", feature);
1111}
1112
1113/* Looks like: mcb:16zN */
1114static void do_mcb_entry(struct module *mod, void *symval)
1115{
1116	DEF_FIELD(symval, mcb_device_id, device);
1117
1118	module_alias_printf(mod, false, "mcb:16z%03d", device);
1119}
1120
1121/* Looks like: mei:S:uuid:N:* */
1122static void do_mei_entry(struct module *mod, void *symval)
1123{
1124	char alias[256] = {};
1125
1126	DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
1127	DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid);
1128	DEF_FIELD(symval, mei_cl_device_id, version);
1129
1130	add_uuid(alias, *uuid);
1131	ADD(alias, ":", version != MEI_CL_VERSION_ANY, version);
1132
1133	module_alias_printf(mod, false, MEI_CL_MODULE_PREFIX "%s:%s:*",
1134			    (*name)[0] ? *name : "*", alias);
1135}
1136
1137/* Looks like: rapidio:vNdNavNadN */
1138static void do_rio_entry(struct module *mod, void *symval)
1139{
1140	char alias[256] = {};
1141
1142	DEF_FIELD(symval, rio_device_id, did);
1143	DEF_FIELD(symval, rio_device_id, vid);
1144	DEF_FIELD(symval, rio_device_id, asm_did);
1145	DEF_FIELD(symval, rio_device_id, asm_vid);
1146
1147	ADD(alias, "v", vid != RIO_ANY_ID, vid);
1148	ADD(alias, "d", did != RIO_ANY_ID, did);
1149	ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
1150	ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
1151
1152	module_alias_printf(mod, true, "rapidio:%s", alias);
1153}
1154
1155/* Looks like: ulpi:vNpN */
1156static void do_ulpi_entry(struct module *mod, void *symval)
1157{
1158	DEF_FIELD(symval, ulpi_device_id, vendor);
1159	DEF_FIELD(symval, ulpi_device_id, product);
1160
1161	module_alias_printf(mod, false, "ulpi:v%04xp%04x", vendor, product);
1162}
1163
1164/* Looks like: hdaudio:vNrNaN */
1165static void do_hda_entry(struct module *mod, void *symval)
1166{
1167	char alias[256] = {};
1168
1169	DEF_FIELD(symval, hda_device_id, vendor_id);
1170	DEF_FIELD(symval, hda_device_id, rev_id);
1171	DEF_FIELD(symval, hda_device_id, api_version);
1172
1173	ADD(alias, "v", vendor_id != 0, vendor_id);
1174	ADD(alias, "r", rev_id != 0, rev_id);
1175	ADD(alias, "a", api_version != 0, api_version);
1176
1177	module_alias_printf(mod, true, "hdaudio:%s", alias);
1178}
1179
1180/* Looks like: sdw:mNpNvNcN */
1181static void do_sdw_entry(struct module *mod, void *symval)
1182{
1183	char alias[256] = {};
1184
1185	DEF_FIELD(symval, sdw_device_id, mfg_id);
1186	DEF_FIELD(symval, sdw_device_id, part_id);
1187	DEF_FIELD(symval, sdw_device_id, sdw_version);
1188	DEF_FIELD(symval, sdw_device_id, class_id);
1189
1190	ADD(alias, "m", mfg_id != 0, mfg_id);
1191	ADD(alias, "p", part_id != 0, part_id);
1192	ADD(alias, "v", sdw_version != 0, sdw_version);
1193	ADD(alias, "c", class_id != 0, class_id);
1194
1195	module_alias_printf(mod, true, "sdw:%s", alias);
1196}
1197
1198/* Looks like: fsl-mc:vNdN */
1199static void do_fsl_mc_entry(struct module *mod, void *symval)
1200{
1201	DEF_FIELD(symval, fsl_mc_device_id, vendor);
1202	DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type);
1203
1204	module_alias_printf(mod, false, "fsl-mc:v%08Xd%s", vendor, *obj_type);
1205}
1206
1207/* Looks like: tbsvc:kSpNvNrN */
1208static void do_tbsvc_entry(struct module *mod, void *symval)
1209{
1210	char alias[256] = {};
1211
1212	DEF_FIELD(symval, tb_service_id, match_flags);
1213	DEF_FIELD_ADDR(symval, tb_service_id, protocol_key);
1214	DEF_FIELD(symval, tb_service_id, protocol_id);
1215	DEF_FIELD(symval, tb_service_id, protocol_version);
1216	DEF_FIELD(symval, tb_service_id, protocol_revision);
1217
1218	if (match_flags & TBSVC_MATCH_PROTOCOL_KEY)
1219		sprintf(alias + strlen(alias), "k%s", *protocol_key);
1220	else
1221		strcat(alias + strlen(alias), "k*");
1222	ADD(alias, "p", match_flags & TBSVC_MATCH_PROTOCOL_ID, protocol_id);
1223	ADD(alias, "v", match_flags & TBSVC_MATCH_PROTOCOL_VERSION,
1224	    protocol_version);
1225	ADD(alias, "r", match_flags & TBSVC_MATCH_PROTOCOL_REVISION,
1226	    protocol_revision);
1227
1228	module_alias_printf(mod, true, "tbsvc:%s", alias);
1229}
1230
1231/* Looks like: typec:idN */
1232static void do_typec_entry(struct module *mod, void *symval)
1233{
1234	DEF_FIELD(symval, typec_device_id, svid);
1235
1236	module_alias_printf(mod, false, "typec:id%04X", svid);
1237}
1238
1239/* Looks like: tee:uuid */
1240static void do_tee_entry(struct module *mod, void *symval)
1241{
1242	DEF_FIELD_ADDR(symval, tee_client_device_id, uuid);
1243
1244	module_alias_printf(mod, true,
1245			    "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
1246		uuid->b[0], uuid->b[1], uuid->b[2], uuid->b[3], uuid->b[4],
1247		uuid->b[5], uuid->b[6], uuid->b[7], uuid->b[8], uuid->b[9],
1248		uuid->b[10], uuid->b[11], uuid->b[12], uuid->b[13], uuid->b[14],
1249		uuid->b[15]);
1250}
1251
1252/* Looks like: wmi:guid */
1253static void do_wmi_entry(struct module *mod, void *symval)
1254{
1255	DEF_FIELD_ADDR(symval, wmi_device_id, guid_string);
1256
1257	if (strlen(*guid_string) != UUID_STRING_LEN) {
1258		warn("Invalid WMI device id 'wmi:%s' in '%s'\n",
1259				*guid_string, mod->name);
1260		return;
1261	}
1262
1263	module_alias_printf(mod, false, WMI_MODULE_PREFIX "%s", *guid_string);
1264}
1265
1266/* Looks like: mhi:S */
1267static void do_mhi_entry(struct module *mod, void *symval)
1268{
1269	DEF_FIELD_ADDR(symval, mhi_device_id, chan);
1270	module_alias_printf(mod, false, MHI_DEVICE_MODALIAS_FMT, *chan);
1271}
1272
1273/* Looks like: mhi_ep:S */
1274static void do_mhi_ep_entry(struct module *mod, void *symval)
1275{
1276	DEF_FIELD_ADDR(symval, mhi_device_id, chan);
1277
1278	module_alias_printf(mod, false, MHI_EP_DEVICE_MODALIAS_FMT, *chan);
1279}
1280
1281/* Looks like: ishtp:{guid} */
1282static void do_ishtp_entry(struct module *mod, void *symval)
1283{
1284	char alias[256] = {};
1285	DEF_FIELD_ADDR(symval, ishtp_device_id, guid);
1286
1287	add_guid(alias, *guid);
1288
1289	module_alias_printf(mod, false, ISHTP_MODULE_PREFIX "{%s}", alias);
1290}
1291
1292static void do_auxiliary_entry(struct module *mod, void *symval)
1293{
1294	DEF_FIELD_ADDR(symval, auxiliary_device_id, name);
1295
1296	module_alias_printf(mod, false, AUXILIARY_MODULE_PREFIX "%s", *name);
1297}
1298
1299/*
1300 * Looks like: ssam:dNcNtNiNfN
1301 *
1302 * N is exactly 2 digits, where each is an upper-case hex digit.
1303 */
1304static void do_ssam_entry(struct module *mod, void *symval)
1305{
1306	char alias[256] = {};
1307
1308	DEF_FIELD(symval, ssam_device_id, match_flags);
1309	DEF_FIELD(symval, ssam_device_id, domain);
1310	DEF_FIELD(symval, ssam_device_id, category);
1311	DEF_FIELD(symval, ssam_device_id, target);
1312	DEF_FIELD(symval, ssam_device_id, instance);
1313	DEF_FIELD(symval, ssam_device_id, function);
1314
1315	ADD(alias, "t", match_flags & SSAM_MATCH_TARGET, target);
1316	ADD(alias, "i", match_flags & SSAM_MATCH_INSTANCE, instance);
1317	ADD(alias, "f", match_flags & SSAM_MATCH_FUNCTION, function);
1318
1319	module_alias_printf(mod, false, "ssam:d%02Xc%02X%s",
1320			    domain, category, alias);
1321}
1322
1323/* Looks like: dfl:tNfN */
1324static void do_dfl_entry(struct module *mod, void *symval)
1325{
1326	DEF_FIELD(symval, dfl_device_id, type);
1327	DEF_FIELD(symval, dfl_device_id, feature_id);
1328
1329	module_alias_printf(mod, true, "dfl:t%04Xf%04X", type, feature_id);
1330}
1331
1332/* Looks like: cdx:vNdN */
1333static void do_cdx_entry(struct module *mod, void *symval)
1334{
1335	char alias[256];
1336
1337	DEF_FIELD(symval, cdx_device_id, vendor);
1338	DEF_FIELD(symval, cdx_device_id, device);
1339	DEF_FIELD(symval, cdx_device_id, subvendor);
1340	DEF_FIELD(symval, cdx_device_id, subdevice);
1341	DEF_FIELD(symval, cdx_device_id, class);
1342	DEF_FIELD(symval, cdx_device_id, class_mask);
1343	DEF_FIELD(symval, cdx_device_id, override_only);
1344
1345	switch (override_only) {
1346	case 0:
1347		strcpy(alias, "cdx:");
1348		break;
1349	case CDX_ID_F_VFIO_DRIVER_OVERRIDE:
1350		strcpy(alias, "vfio_cdx:");
1351		break;
1352	default:
1353		warn("Unknown CDX driver_override alias %08X\n",
1354		     override_only);
1355		return;
1356	}
1357
1358	ADD(alias, "v", vendor != CDX_ANY_ID, vendor);
1359	ADD(alias, "d", device != CDX_ANY_ID, device);
1360	ADD(alias, "sv", subvendor != CDX_ANY_ID, subvendor);
1361	ADD(alias, "sd", subdevice != CDX_ANY_ID, subdevice);
1362	ADD(alias, "c", class_mask == 0xFFFFFF, class);
1363
1364	module_alias_printf(mod, false, "%s", alias);
1365}
1366
1367static void do_vchiq_entry(struct module *mod, void *symval)
1368{
1369	DEF_FIELD_ADDR(symval, vchiq_device_id, name);
1370
1371	module_alias_printf(mod, false, "vchiq:%s", *name);
1372}
1373
1374/* Looks like: coreboot:tN */
1375static void do_coreboot_entry(struct module *mod, void *symval)
1376{
1377	DEF_FIELD(symval, coreboot_device_id, tag);
1378
1379	module_alias_printf(mod, false, "coreboot:t%08X", tag);
1380}
1381
1382/* Does namelen bytes of name exactly match the symbol? */
1383static bool sym_is(const char *name, unsigned namelen, const char *symbol)
1384{
1385	if (namelen != strlen(symbol))
1386		return false;
1387
1388	return memcmp(name, symbol, namelen) == 0;
1389}
1390
1391static void do_table(const char *name, void *symval, unsigned long size,
1392		     unsigned long id_size,
1393		     const char *device_id,
1394		     void (*do_entry)(struct module *mod, void *symval),
1395		     struct module *mod)
1396{
1397	unsigned int i;
1398
1399	if (size % id_size || size < id_size) {
1400		error("%s: type mismatch between %s[] and MODULE_DEVICE_TABLE(%s, ...)\n",
1401		      mod->name, name, device_id);
1402		return;
1403	}
1404
1405	/* Verify the last entry is a terminator */
1406	for (i = size - id_size; i < size; i++) {
1407		if (*(uint8_t *)(symval + i)) {
1408			error("%s: %s[] is not terminated with a NULL entry\n",
1409			      mod->name, name);
1410			return;
1411		}
1412	}
1413
1414	/* Leave last one: it's the terminator. */
1415	size -= id_size;
1416
1417	for (i = 0; i < size; i += id_size)
1418		do_entry(mod, symval + i);
1419}
1420
1421static const struct devtable devtable[] = {
1422	{"hid", SIZE_hid_device_id, do_hid_entry},
1423	{"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry},
1424	{"pci", SIZE_pci_device_id, do_pci_entry},
1425	{"ccw", SIZE_ccw_device_id, do_ccw_entry},
1426	{"ap", SIZE_ap_device_id, do_ap_entry},
1427	{"css", SIZE_css_device_id, do_css_entry},
1428	{"serio", SIZE_serio_device_id, do_serio_entry},
1429	{"acpi", SIZE_acpi_device_id, do_acpi_entry},
1430	{"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry},
1431	{"vio", SIZE_vio_device_id, do_vio_entry},
1432	{"input", SIZE_input_device_id, do_input_entry},
1433	{"eisa", SIZE_eisa_device_id, do_eisa_entry},
1434	{"parisc", SIZE_parisc_device_id, do_parisc_entry},
1435	{"sdio", SIZE_sdio_device_id, do_sdio_entry},
1436	{"ssb", SIZE_ssb_device_id, do_ssb_entry},
1437	{"bcma", SIZE_bcma_device_id, do_bcma_entry},
1438	{"virtio", SIZE_virtio_device_id, do_virtio_entry},
1439	{"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry},
1440	{"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry},
1441	{"i2c", SIZE_i2c_device_id, do_i2c_entry},
1442	{"i3c", SIZE_i3c_device_id, do_i3c_entry},
1443	{"slim", SIZE_slim_device_id, do_slim_entry},
1444	{"spi", SIZE_spi_device_id, do_spi_entry},
1445	{"dmi", SIZE_dmi_system_id, do_dmi_entry},
1446	{"platform", SIZE_platform_device_id, do_platform_entry},
1447	{"mdio", SIZE_mdio_device_id, do_mdio_entry},
1448	{"zorro", SIZE_zorro_device_id, do_zorro_entry},
1449	{"isapnp", SIZE_isapnp_device_id, do_isapnp_entry},
1450	{"ipack", SIZE_ipack_device_id, do_ipack_entry},
1451	{"amba", SIZE_amba_id, do_amba_entry},
1452	{"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry},
1453	{"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry},
1454	{"cpu", SIZE_cpu_feature, do_cpu_entry},
1455	{"mcb", SIZE_mcb_device_id, do_mcb_entry},
1456	{"mei", SIZE_mei_cl_device_id, do_mei_entry},
1457	{"rapidio", SIZE_rio_device_id, do_rio_entry},
1458	{"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
1459	{"hdaudio", SIZE_hda_device_id, do_hda_entry},
1460	{"sdw", SIZE_sdw_device_id, do_sdw_entry},
1461	{"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry},
1462	{"tbsvc", SIZE_tb_service_id, do_tbsvc_entry},
1463	{"typec", SIZE_typec_device_id, do_typec_entry},
1464	{"tee", SIZE_tee_client_device_id, do_tee_entry},
1465	{"wmi", SIZE_wmi_device_id, do_wmi_entry},
1466	{"mhi", SIZE_mhi_device_id, do_mhi_entry},
1467	{"mhi_ep", SIZE_mhi_device_id, do_mhi_ep_entry},
1468	{"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry},
1469	{"ssam", SIZE_ssam_device_id, do_ssam_entry},
1470	{"dfl", SIZE_dfl_device_id, do_dfl_entry},
1471	{"ishtp", SIZE_ishtp_device_id, do_ishtp_entry},
1472	{"cdx", SIZE_cdx_device_id, do_cdx_entry},
1473	{"vchiq", SIZE_vchiq_device_id, do_vchiq_entry},
1474	{"coreboot", SIZE_coreboot_device_id, do_coreboot_entry},
1475	{"of", SIZE_of_device_id, do_of_entry},
1476	{"usb", SIZE_usb_device_id, do_usb_entry_multi},
1477	{"pnp", SIZE_pnp_device_id, do_pnp_device_entry},
1478	{"pnp_card", SIZE_pnp_card_device_id, do_pnp_card_entry},
1479};
1480
1481/* Create MODULE_ALIAS() statements.
1482 * At this time, we cannot write the actual output C source yet,
1483 * so we write into the mod->dev_table_buf buffer. */
1484void handle_moddevtable(struct module *mod, struct elf_info *info,
1485			Elf_Sym *sym, const char *symname)
1486{
1487	void *symval;
1488	char *zeros = NULL;
1489	const char *type, *name, *modname;
1490	size_t typelen, modnamelen;
1491	static const char *prefix = "__mod_device_table__";
1492
1493	/* We're looking for a section relative symbol */
1494	if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
1495		return;
1496
1497	/* We're looking for an object */
1498	if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
1499		return;
1500
1501	/* All our symbols are of form __mod_device_table__kmod_<modname>__<type>__<name>. */
1502	if (!strstarts(symname, prefix))
1503		return;
1504
1505	modname = strstr(symname, "__kmod_");
1506	if (!modname)
1507		return;
1508	modname += strlen("__kmod_");
1509
1510	type = strstr(modname, "__");
1511	if (!type)
1512		return;
1513	modnamelen = type - modname;
1514	type += strlen("__");
1515
1516	name = strstr(type, "__");
1517	if (!name)
1518		return;
1519	typelen = name - type;
1520	name += strlen("__");
1521
1522	/* Handle all-NULL symbols allocated into .bss */
1523	if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
1524		zeros = calloc(1, sym->st_size);
1525		symval = zeros;
1526	} else {
1527		symval = sym_get_data(info, sym);
1528	}
1529
1530	for (int i = 0; i < ARRAY_SIZE(devtable); i++) {
1531		const struct devtable *p = &devtable[i];
1532
1533		if (sym_is(type, typelen, p->device_id)) {
1534			do_table(name, symval, sym->st_size, p->id_size,
1535				 p->device_id, p->do_entry, mod);
1536			break;
1537		}
1538	}
1539
1540	if (mod->is_vmlinux) {
1541		struct module_alias *alias;
1542
1543		/*
1544		 * If this is vmlinux, record the name of the builtin module.
1545		 * Traverse the linked list in the reverse order, and set the
1546		 * builtin_modname unless it has already been set in the
1547		 * previous call.
1548		 */
1549		list_for_each_entry_reverse(alias, &mod->aliases, node) {
1550			if (alias->builtin_modname)
1551				break;
1552			alias->builtin_modname = xstrndup(modname, modnamelen);
1553		}
1554	}
1555
1556	free(zeros);
1557}