summaryrefslogtreecommitdiffstats
path: root/scripts/mod/file2alias.c
blob: 62c517f4b5923a1f2efedcb7bb2e0ecd1bde5500 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
/* Simple code to turn various tables in an ELF file into alias definitions.
 * This deals with kernel datastructures where they should be
 * dealt with: in the kernel source.
 *
 * Copyright 2002-2003  Rusty Russell, IBM Corporation
 *           2003       Kai Germaschewski
 *
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 */

#include "modpost.h"
#include "devicetable-offsets.h"

/* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
 * use either stdint.h or inttypes.h for the rest. */
#if KERNEL_ELFCLASS == ELFCLASS32
typedef Elf32_Addr	kernel_ulong_t;
#define BITS_PER_LONG 32
#else
typedef Elf64_Addr	kernel_ulong_t;
#define BITS_PER_LONG 64
#endif
#ifdef __sun__
#include <inttypes.h>
#else
#include <stdint.h>
#endif

#include <ctype.h>
#include <stdbool.h>

typedef uint32_t	__u32;
typedef uint16_t	__u16;
typedef unsigned char	__u8;

/* Big exception to the "don't include kernel headers into userspace, which
 * even potentially has different endianness and word sizes, since
 * we handle those differences explicitly below */
#include "../../include/linux/mod_devicetable.h"

/* This array collects all instances that use the generic do_table */
struct devtable {
	const char *device_id; /* name of table, __mod_<name>__*_device_table. */
	unsigned long id_size;
	void *function;
};

#define ___cat(a,b) a ## b
#define __cat(a,b) ___cat(a,b)

/* we need some special handling for this host tool running eventually on
 * Darwin. The Mach-O section handling is a bit different than ELF section
 * handling. The differnces in detail are:
 *  a) we have segments which have sections
 *  b) we need a API call to get the respective section symbols */
#if defined(__MACH__)
#include <mach-o/getsect.h>

#define INIT_SECTION(name)  do {					\
		unsigned long name ## _len;				\
		char *__cat(pstart_,name) = getsectdata("__TEXT",	\
			#name, &__cat(name,_len));			\
		char *__cat(pstop_,name) = __cat(pstart_,name) +	\
			__cat(name, _len);				\
		__cat(__start_,name) = (void *)__cat(pstart_,name);	\
		__cat(__stop_,name) = (void *)__cat(pstop_,name);	\
	} while (0)
#define SECTION(name)   __attribute__((section("__TEXT, " #name)))

struct devtable **__start___devtable, **__stop___devtable;
#else
#define INIT_SECTION(name) /* no-op for ELF */
#define SECTION(name)   __attribute__((section(#name)))

/* We construct a table of pointers in an ELF section (pointers generally
 * go unpadded by gcc).  ld creates boundary syms for us. */
extern struct devtable *__start___devtable[], *__stop___devtable[];
#endif /* __MACH__ */

#if !defined(__used)
# if __GNUC__ == 3 && __GNUC_MINOR__ < 3
#  define __used			__attribute__((__unused__))
# else
#  define __used			__attribute__((__used__))
# endif
#endif

/* Define a variable f that holds the value of field f of struct devid
 * based at address m.
 */
#define DEF_FIELD(m, devid, f) \
	typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))
/* Define a variable f that holds the address of field f of struct devid
 * based at address m.  Due to the way typeof works, for a field of type
 * T[N] the variable has type T(*)[N], _not_ T*.
 */
#define DEF_FIELD_ADDR(m, devid, f) \
	typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f)

/* Add a table entry.  We test function type matches while we're here. */
#define ADD_TO_DEVTABLE(device_id, type, function) \
	static struct devtable __cat(devtable,__LINE__) = {	\
		device_id + 0*sizeof((function)((const char *)NULL,	\
						(void *)NULL,		\
						(char *)NULL)),		\
		SIZE_##type, (function) };				\
	static struct devtable *SECTION(__devtable) __used \
		__cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__)

#define ADD(str, sep, cond, field)                              \
do {                                                            \
        strcat(str, sep);                                       \
        if (cond)                                               \
                sprintf(str + strlen(str),                      \
                        sizeof(field) == 1 ? "%02X" :           \
                        sizeof(field) == 2 ? "%04X" :           \
                        sizeof(field) == 4 ? "%08X" : "",       \
                        field);                                 \
        else                                                    \
                sprintf(str + strlen(str), "*");                \
} while(0)

/* Always end in a wildcard, for future extension */
static inline void add_wildcard(char *str)
{
	int len = strlen(str);

	if (str[len - 1] != '*')
		strcat(str + len, "*");
}

static inline void add_uuid(char *str, __u8 uuid[16])
{
	int len = strlen(str);
	int i;

	for (i = 0; i < 16; i++)
		sprintf(str + len + (i << 1), "%02x", uuid[i]);
}

/**
 * Check that sizeof(device_id type) are consistent with size of section
 * in .o file. If in-consistent then userspace and kernel does not agree
 * on actual size which is a bug.
 * Also verify that the final entry in the table is all zeros.
 * Ignore both checks if build host differ from target host and size differs.
 **/
static void device_id_check(const char *modname, const char *device_id,
			    unsigned long size, unsigned long id_size,
			    void *symval)
{
	int i;

	if (size % id_size || size < id_size) {
		fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
		      "of the size of "
		      "section __mod_%s__<identifier>_device_table=%lu.\n"
		      "Fix definition of struct %s_device_id "
		      "in mod_devicetable.h\n",
		      modname, device_id, id_size, device_id, size, device_id);
	}
	/* Verify last one is a terminator */
	for (i = 0; i < id_size; i++ ) {
		if (*(uint8_t*)(symval+size-id_size+i)) {
			fprintf(stderr,"%s: struct %s_device_id is %lu bytes.  "
				"The last of %lu is:\n",
				modname, device_id, id_size, size / id_size);
			for (i = 0; i < id_size; i++ )
				fprintf(stderr,"0x%02x ",
					*(uint8_t*)(symval+size-id_size+i) );
			fprintf(stderr,"\n");
			fatal("%s: struct %s_device_id is not terminated "
				"with a NULL entry!\n", modname, device_id);
		}
	}
}

/* USB is special because the bcdDevice can be matched against a numeric range */
/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */
static void do_usb_entry(void *symval,
			 unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
			 unsigned char range_lo, unsigned char range_hi,
			 unsigned char max, struct module *mod)
{
	char alias[500];
	DEF_FIELD(symval, usb_device_id, match_flags);
	DEF_FIELD(symval, usb_device_id, idVendor);
	DEF_FIELD(symval, usb_device_id, idProduct);
	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
	DEF_FIELD(symval, usb_device_id, bDeviceClass);
	DEF_FIELD(symval, usb_device_id, bDeviceSubClass);
	DEF_FIELD(symval, usb_device_id, bDeviceProtocol);
	DEF_FIELD(symval, usb_device_id, bInterfaceClass);
	DEF_FIELD(symval, usb_device_id, bInterfaceSubClass);
	DEF_FIELD(symval, usb_device_id, bInterfaceProtocol);
	DEF_FIELD(symval, usb_device_id, bInterfaceNumber);

	strcpy(alias, "usb:");
	ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR,
	    idVendor);
	ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
	    idProduct);

	strcat(alias, "d");
	if (bcdDevice_initial_digits)
		sprintf(alias + strlen(alias), "%0*X",
			bcdDevice_initial_digits, bcdDevice_initial);
	if (range_lo == range_hi)
		sprintf(alias + strlen(alias), "%X", range_lo);
	else if (range_lo > 0 || range_hi < max) {
		if (range_lo > 0x9 || range_hi < 0xA)
			sprintf(alias + strlen(alias),
				"[%X-%X]",
				range_lo,
				range_hi);
		else {
			sprintf(alias + strlen(alias),
				range_lo < 0x9 ? "[%X-9" : "[%X",
				range_lo);
			sprintf(alias + strlen(alias),
				range_hi > 0xA ? "A-%X]" : "%X]",
				range_hi);
		}
	}
	if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1))
		strcat(alias, "*");

	ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
	    bDeviceClass);
	ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
	    bDeviceSubClass);
	ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
	    bDeviceProtocol);
	ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
	    bInterfaceClass);
	ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
	    bInterfaceSubClass);
	ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
	    bInterfaceProtocol);
	ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
	    bInterfaceNumber);

	add_wildcard(alias);
	buf_printf(&mod->dev_table_buf,
		   "MODULE_ALIAS(\"%s\");\n", alias);
}

/* Handles increment/decrement of BCD formatted integers */
/* Returns the previous value, so it works like i++ or i-- */
static unsigned int incbcd(unsigned int *bcd,
			   int inc,
			   unsigned char max,
			   size_t chars)
{
	unsigned int init = *bcd, i, j;
	unsigned long long c, dec = 0;

	/* If bcd is not in BCD format, just increment */
	if (max > 0x9) {
		*bcd += inc;
		return init;
	}

	/* Convert BCD to Decimal */
	for (i=0 ; i < chars ; i++) {
		c = (*bcd >> (i << 2)) & 0xf;
		c = c > 9 ? 9 : c; /* force to bcd just in case */
		for (j=0 ; j < i ; j++)
			c = c * 10;
		dec += c;
	}

	/* Do our increment/decrement */
	dec += inc;
	*bcd  = 0;

	/* Convert back to BCD */
	for (i=0 ; i < chars ; i++) {
		for (c=1,j=0 ; j < i ; j++)
			c = c * 10;
		c = (dec / c) % 10;
		*bcd += c << (i << 2);
	}
	return init;
}

static void do_usb_entry_multi(void *symval, struct module *mod)
{
	unsigned int devlo, devhi;
	unsigned char chi, clo, max;
	int ndigits;

	DEF_FIELD(symval, usb_device_id, match_flags);
	DEF_FIELD(symval, usb_device_id, idVendor);
	DEF_FIELD(symval, usb_device_id, idProduct);
	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
	DEF_FIELD(symval, usb_device_id, bcdDevice_hi);
	DEF_FIELD(symval, usb_device_id, bDeviceClass);
	DEF_FIELD(symval, usb_device_id, bInterfaceClass);

	devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
		bcdDevice_lo : 0x0U;
	devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
		bcdDevice_hi : ~0x0U;

	/* Figure out if this entry is in bcd or hex format */
	max = 0x9; /* Default to decimal format */
	for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) {
		clo = (devlo >> (ndigits << 2)) & 0xf;
		chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
		if (clo > max || chi > max) {
			max = 0xf;
			break;
		}
	}

	/*
	 * Some modules (visor) have empty slots as placeholder for
	 * run-time specification that results in catch-all alias
	 */
	if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass))
		return;

	/* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
	for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
		clo = devlo & 0xf;
		chi = devhi & 0xf;
		if (chi > max)	/* If we are in bcd mode, truncate if necessary */
			chi = max;
		devlo >>= 4;
		devhi >>= 4;

		if (devlo == devhi || !ndigits) {
			do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod);
			break;
		}

		if (clo > 0x0)
			do_usb_entry(symval,
				     incbcd(&devlo, 1, max,
					    sizeof(bcdDevice_lo) * 2),
				     ndigits, clo, max, max, mod);

		if (chi < max)
			do_usb_entry(symval,
				     incbcd(&devhi, -1, max,
					    sizeof(bcdDevice_lo) * 2),
				     ndigits, 0x0, chi, max, mod);
	}
}

static void do_usb_table(void *symval, unsigned long size,
			 struct module *mod)
{
	unsigned int i;
	const unsigned long id_size = SIZE_usb_device_id;

	device_id_check(mod->name, "usb", size, id_size, symval);

	/* Leave last one: it's the terminator. */
	size -= id_size;

	for (i = 0; i < size; i += id_size)
		do_usb_entry_multi(symval + i, mod);
}

/* Looks like: hid:bNvNpN */
static int do_hid_entry(const char *filename,
			     void *symval, char *alias)
{
	DEF_FIELD(symval, hid_device_id, bus);
	DEF_FIELD(symval, hid_device_id, group);
	DEF_FIELD(symval, hid_device_id, vendor);
	DEF_FIELD(symval, hid_device_id, product);

	sprintf(alias, "hid:");
	ADD(alias, "b", bus != HID_BUS_ANY, bus);
	ADD(alias, "g", group != HID_GROUP_ANY, group);
	ADD(alias, "v", vendor != HID_ANY_ID, vendor);
	ADD(alias, "p", product != HID_ANY_ID, product);

	return 1;
}
ADD_TO_DEVTABLE("hid", hid_device_id, do_hid_entry);

/* Looks like: ieee1394:venNmoNspNverN */
static int do_ieee1394_entry(const char *filename,
			     void *symval, char *alias)
{
	DEF_FIELD(symval, ieee1394_device_id, match_flags);
	DEF_FIELD(symval, ieee1394_device_id, vendor_id);
	DEF_FIELD(symval, ieee1394_device_id, model_id);
	DEF_FIELD(symval, ieee1394_device_id, specifier_id);
	DEF_FIELD(symval, ieee1394_device_id, version);

	strcpy(alias, "ieee1394:");
	ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID,
	    vendor_id);
	ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID,
	    model_id);
	ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID,
	    specifier_id);
	ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION,
	    version);

	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("ieee1394", ieee1394_device_id, do_ieee1394_entry);

/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
static int do_pci_entry(const char *filename,
			void *symval, char *alias)
{
	/* Class field can be divided into these three. */
	unsigned char baseclass, subclass, interface,
		baseclass_mask, subclass_mask, interface_mask;

	DEF_FIELD(symval, pci_device_id, vendor);
	DEF_FIELD(symval, pci_device_id, device);
	DEF_FIELD(symval, pci_device_id, subvendor);
	DEF_FIELD(symval, pci_device_id, subdevice);
	DEF_FIELD(symval, pci_device_id, class);
	DEF_FIELD(symval, pci_device_id, class_mask);

	strcpy(alias, "pci:");
	ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
	ADD(alias, "d", device != PCI_ANY_ID, device);
	ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
	ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);

	baseclass = (class) >> 16;
	baseclass_mask = (class_mask) >> 16;
	subclass = (class) >> 8;
	subclass_mask = (class_mask) >> 8;
	interface = class;
	interface_mask = class_mask;

	if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
	    || (subclass_mask != 0 && subclass_mask != 0xFF)
	    || (interface_mask != 0 && interface_mask != 0xFF)) {
		warn("Can't handle masks in %s:%04X\n",
		     filename, class_mask);
		return 0;
	}

	ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
	ADD(alias, "sc", subclass_mask == 0xFF, subclass);
	ADD(alias, "i", interface_mask == 0xFF, interface);
	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("pci", pci_device_id, do_pci_entry);

/* looks like: "ccw:tNmNdtNdmN" */
static int do_ccw_entry(const char *filename,
			void *symval, char *alias)
{
	DEF_FIELD(symval, ccw_device_id, match_flags);
	DEF_FIELD(symval, ccw_device_id, cu_type);
	DEF_FIELD(symval, ccw_device_id, cu_model);
	DEF_FIELD(symval, ccw_device_id, dev_type);
	DEF_FIELD(symval, ccw_device_id, dev_model);

	strcpy(alias, "ccw:");
	ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
	    cu_type);
	ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
	    cu_model);
	ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
	    dev_type);
	ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
	    dev_model);
	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("ccw", ccw_device_id, do_ccw_entry);

/* looks like: "ap:tN" */
static int do_ap_entry(const char *filename,
		       void *symval, char *alias)
{
	DEF_FIELD(symval, ap_device_id, dev_type);

	sprintf(alias, "ap:t%02X*", dev_type);
	return 1;
}
ADD_TO_DEVTABLE("ap", ap_device_id, do_ap_entry);

/* looks like: "css:tN" */
static int do_css_entry(const char *filename,
			void *symval, char *alias)
{
	DEF_FIELD(symval, css_device_id, type);

	sprintf(alias, "css:t%01X", type);
	return 1;
}
ADD_TO_DEVTABLE("css", css_device_id, do_css_entry);

/* Looks like: "serio:tyNprNidNexN" */
static int do_serio_entry(const char *filename,
			  void *symval, char *alias)
{
	DEF_FIELD(symval, serio_device_id, type);
	DEF_FIELD(symval, serio_device_id, proto);
	DEF_FIELD(symval, serio_device_id, id);
	DEF_FIELD(symval, serio_device_id, extra);

	strcpy(alias, "serio:");
	ADD(alias, "ty", type != SERIO_ANY, type);
	ADD(alias, "pr", proto != SERIO_ANY, proto);
	ADD(alias, "id", id != SERIO_ANY, id);
	ADD(alias, "ex", extra != SERIO_ANY, extra);

	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("serio", serio_device_id, do_serio_entry);

/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
static int do_acpi_entry(const char *filename,
			void *symval, char *alias)
{
	DEF_FIELD_ADDR(symval, acpi_device_id, id);
	sprintf(alias, "acpi*:%s:*", *id);
	return 1;
}
ADD_TO_DEVTABLE("acpi", acpi_device_id, do_acpi_entry);

/* looks like: "pnp:dD" */
static void do_pnp_device_entry(void *symval, unsigned long size,
				struct module *mod)
{
	const unsigned long id_size = SIZE_pnp_device_id;
	const unsigned int count = (size / id_size)-1;
	unsigned int i;

	device_id_check(mod->name, "pnp", size, id_size, symval);

	for (i = 0; i < count; i++) {
		DEF_FIELD_ADDR(symval + i*id_size, pnp_device_id, id);
		char acpi_id[sizeof(*id)];
		int j;

		buf_printf(&mod->dev_table_buf,
			   "MODULE_ALIAS(\"pnp:d%s*\");\n", *id);

		/* fix broken pnp bus lowercasing */
		for (j = 0; j < sizeof(acpi_id); j++)
			acpi_id[j] = toupper((*id)[j]);
		buf_printf(&mod->dev_table_buf,
			   "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
	}
}

/* looks like: "pnp:dD" for every device of the card */
static void do_pnp_card_entries(void *symval, unsigned long size,
				struct module *mod)
{
	const unsigned long id_size = SIZE_pnp_card_device_id;
	const unsigned int count = (size / id_size)-1;
	unsigned int i;

	device_id_check(mod->name, "pnp", size, id_size, symval);

	for (i = 0; i < count; i++) {
		unsigned int j;
		DEF_FIELD_ADDR(symval + i*id_size, pnp_card_device_id, devs);

		for (j = 0; j < PNP_MAX_DEVICES; j++) {
			const char *id = (char *)(*devs)[j].id;
			int i2, j2;
			int dup = 0;

			if (!id[0])
				break;

			/* find duplicate, already added value */
			for (i2 = 0; i2 < i && !dup; i2++) {
				DEF_FIELD_ADDR(symval + i2*id_size, pnp_card_device_id, devs);

				for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
					const char *id2 = (char *)(*devs)[j2].id;

					if (!id2[0])
						break;

					if (!strcmp(id, id2)) {
						dup = 1;
						break;
					}
				}
			}

			/* add an individual alias for every device entry */
			if (!dup) {
				char acpi_id[PNP_ID_LEN];
				int k;

				buf_printf(&mod->dev_table_buf,
					   "MODULE_ALIAS(\"pnp:d%s*\");\n", id);

				/* fix broken pnp bus lowercasing */
				for (k = 0; k < sizeof(acpi_id); k++)
					acpi_id[k] = toupper(id[k]);
				buf_printf(&mod->dev_table_buf,
					   "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
			}
		}
	}
}

/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
static int do_pcmcia_entry(const char *filename,
			   void *symval, char *alias)
{
	unsigned int i;
	DEF_FIELD(symval, pcmcia_device_id, match_flags);
	DEF_FIELD(symval, pcmcia_device_id, manf_id);
	DEF_FIELD(symval, pcmcia_device_id, card_id);
	DEF_FIELD(symval, pcmcia_device_id, func_id);
	DEF_FIELD(symval, pcmcia_device_id, function);
	DEF_FIELD(symval, pcmcia_device_id, device_no);
	DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);

	for (i=0; i<4; i++) {
		(*prod_id_hash)[i] = TO_NATIVE((*prod_id_hash)[i]);
	}

	strcpy(alias, "pcmcia:");
	ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
	    manf_id);
	ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
	    card_id);
	ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
	    func_id);
	ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
	    function);
	ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
	    device_no);
	ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, (*prod_id_hash)[0]);
	ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, (*prod_id_hash)[1]);
	ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, (*prod_id_hash)[2]);
	ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, (*prod_id_hash)[3]);

	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("pcmcia", pcmcia_device_id, do_pcmcia_entry);

static int do_of_entry (const char *filename, void *symval, char *alias)
{
	int len;
	char *tmp;
	DEF_FIELD_ADDR(symval, of_device_id, name);
	DEF_FIELD_ADDR(symval, of_device_id, type);
	DEF_FIELD_ADDR(symval, of_device_id, compatible);

	len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*",
		      (*type)[0] ? *type : "*");

	if (compatible[0])
		sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "",
			*compatible);

	/* Replace all whitespace with underscores */
	for (tmp = alias; tmp && *tmp; tmp++)
		if (isspace (*tmp))
			*tmp = '_';

	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("of", of_device_id, do_of_entry);

static int do_vio_entry(const char *filename, void *symval,
		char *alias)
{
	char *tmp;
	DEF_FIELD_ADDR(symval, vio_device_id, type);
	DEF_FIELD_ADDR(symval, vio_device_id, compat);

	sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
			(*compat)[0] ? *compat : "*");

	/* Replace all whitespace with underscores */
	for (tmp = alias; tmp && *tmp; tmp++)
		if (isspace (*tmp))
			*tmp = '_';

	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("vio", vio_device_id, do_vio_entry);

#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))

static void do_input(char *alias,
		     kernel_ulong_t *arr, unsigned int min, unsigned int max)
{
	unsigned int i;

	for (i = min / BITS_PER_LONG; i < max / BITS_PER_LONG + 1; i++)
		arr[i] = TO_NATIVE(arr[i]);
	for (i = min; i < max; i++)
		if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
			sprintf(alias + strlen(alias), "%X,*", i);
}

/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
static int do_input_entry(const char *filename, void *symval,
			  char *alias)
{
	DEF_FIELD(symval, input_device_id, flags);
	DEF_FIELD(symval, input_device_id, bustype);
	DEF_FIELD(symval, input_device_id, vendor);
	DEF_FIELD(symval, input_device_id, product);
	DEF_FIELD(symval, input_device_id, version);
	DEF_FIELD_ADDR(symval, input_device_id, evbit);
	DEF_FIELD_ADDR(symval, input_device_id, keybit);
	DEF_FIELD_ADDR(symval, input_device_id, relbit);
	DEF_FIELD_ADDR(symval, input_device_id, absbit);
	DEF_FIELD_ADDR(symval, input_device_id, mscbit);
	DEF_FIELD_ADDR(symval, input_device_id, ledbit);
	DEF_FIELD_ADDR(symval, input_device_id, sndbit);
	DEF_FIELD_ADDR(symval, input_device_id, ffbit);
	DEF_FIELD_ADDR(symval, input_device_id, swbit);

	sprintf(alias, "input:");

	ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
	ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
	ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
	ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);

	sprintf(alias + strlen(alias), "-e*");
	if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
		do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
	sprintf(alias + strlen(alias), "k*");
	if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
		do_input(alias, *keybit,
			 INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
			 INPUT_DEVICE_ID_KEY_MAX);
	sprintf(alias + strlen(alias), "r*");
	if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
		do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
	sprintf(alias + strlen(alias), "a*");
	if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
		do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
	sprintf(alias + strlen(alias), "m*");
	if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
		do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
	sprintf(alias + strlen(alias), "l*");
	if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
		do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
	sprintf(alias + strlen(alias), "s*");
	if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
		do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
	sprintf(alias + strlen(alias), "f*");
	if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
		do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
	sprintf(alias + strlen(alias), "w*");
	if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
		do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
	return 1;
}
ADD_TO_DEVTABLE("input", input_device_id, do_input_entry);

static int do_eisa_entry(const char *filename, void *symval,
		char *alias)
{
	DEF_FIELD_ADDR(symval, eisa_device_id, sig);
	if (sig[0])
		sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", *sig);
	else
		strcat(alias, "*");
	return 1;
}
ADD_TO_DEVTABLE("eisa", eisa_device_id, do_eisa_entry);

/* Looks like: parisc:tNhvNrevNsvN */
static int do_parisc_entry(const char *filename, void *symval,
		char *alias)
{
	DEF_FIELD(symval, parisc_device_id, hw_type);
	DEF_FIELD(symval, parisc_device_id, hversion);
	DEF_FIELD(symval, parisc_device_id, hversion_rev);
	DEF_FIELD(symval, parisc_device_id, sversion);

	strcpy(alias, "parisc:");
	ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
	ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
	ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
	ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);

	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("parisc", parisc_device_id, do_parisc_entry);

/* Looks like: sdio:cNvNdN. */
static int do_sdio_entry(const char *filename,
			void *symval, char *alias)
{
	DEF_FIELD(symval, sdio_device_id, class);
	DEF_FIELD(symval, sdio_device_id, vendor);
	DEF_FIELD(symval, sdio_device_id, device);

	strcpy(alias, "sdio:");
	ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
	ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
	ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("sdio", sdio_device_id, do_sdio_entry);

/* Looks like: ssb:vNidNrevN. */
static int do_ssb_entry(const char *filename,
			void *symval, char *alias)
{
	DEF_FIELD(symval, ssb_device_id, vendor);
	DEF_FIELD(symval, ssb_device_id, coreid);
	DEF_FIELD(symval, ssb_device_id, revision);

	strcpy(alias, "ssb:");
	ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
	ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
	ADD(alias, "rev", revision != SSB_ANY_REV, revision);
	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("ssb", ssb_device_id, do_ssb_entry);

/* Looks like: bcma:mNidNrevNclN. */
static int do_bcma_entry(const char *filename,
			 void *symval, char *alias)
{
	DEF_FIELD(symval, bcma_device_id, manuf);
	DEF_FIELD(symval, bcma_device_id, id);
	DEF_FIELD(symval, bcma_device_id, rev);
	DEF_FIELD(symval, bcma_device_id, class);

	strcpy(alias, "bcma:");
	ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
	ADD(alias, "id", id != BCMA_ANY_ID, id);
	ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
	ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("bcma", bcma_device_id, do_bcma_entry);

/* Looks like: virtio:dNvN */
static int do_virtio_entry(const char *filename, void *symval,
			   char *alias)
{
	DEF_FIELD(symval, virtio_device_id, device);
	DEF_FIELD(symval, virtio_device_id, vendor);

	strcpy(alias, "virtio:");
	ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
	ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);

	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("virtio", virtio_device_id, do_virtio_entry);

/*
 * Looks like: vmbus:guid
 * Each byte of the guid will be represented by two hex characters
 * in the name.
 */

static int do_vmbus_entry(const char *filename, void *symval,
			  char *alias)
{
	int i;
	DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
	char guid_name[(sizeof(*guid) + 1) * 2];

	for (i = 0; i < (sizeof(*guid) * 2); i += 2)
		sprintf(&guid_name[i], "%02x", TO_NATIVE((*guid)[i/2]));

	strcpy(alias, "vmbus:");
	strcat(alias, guid_name);

	return 1;
}
ADD_TO_DEVTABLE("vmbus", hv_vmbus_device_id, do_vmbus_entry);

/* Looks like: i2c:S */
static int do_i2c_entry(const char *filename, void *symval,
			char *alias)
{
	DEF_FIELD_ADDR(symval, i2c_device_id, name);
	sprintf(alias, I2C_MODULE_PREFIX "%s", *name);

	return 1;
}
ADD_TO_DEVTABLE("i2c", i2c_device_id, do_i2c_entry);

/* Looks like: spi:S */
static int do_spi_entry(const char *filename, void *symval,
			char *alias)
{
	DEF_FIELD_ADDR(symval, spi_device_id, name);
	sprintf(alias, SPI_MODULE_PREFIX "%s", *name);

	return 1;
}
ADD_TO_DEVTABLE("spi", spi_device_id, do_spi_entry);

static const struct dmifield {
	const char *prefix;
	int field;
} dmi_fields[] = {
	{ "bvn", DMI_BIOS_VENDOR },
	{ "bvr", DMI_BIOS_VERSION },
	{ "bd",  DMI_BIOS_DATE },
	{ "svn", DMI_SYS_VENDOR },
	{ "pn",  DMI_PRODUCT_NAME },
	{ "pvr", DMI_PRODUCT_VERSION },
	{ "rvn", DMI_BOARD_VENDOR },
	{ "rn",  DMI_BOARD_NAME },
	{ "rvr", DMI_BOARD_VERSION },
	{ "cvn", DMI_CHASSIS_VENDOR },
	{ "ct",  DMI_CHASSIS_TYPE },
	{ "cvr", DMI_CHASSIS_VERSION },
	{ NULL,  DMI_NONE }
};

static void dmi_ascii_filter(char *d, const char *s)
{
	/* Filter out characters we don't want to see in the modalias string */
	for (; *s; s++)
		if (*s > ' ' && *s < 127 && *s != ':')
			*(d++) = *s;

	*d = 0;
}


static int do_dmi_entry(const char *filename, void *symval,
			char *alias)
{
	int i, j;
	DEF_FIELD_ADDR(symval, dmi_system_id, matches);
	sprintf(alias, "dmi*");

	for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
		for (j = 0; j < 4; j++) {
			if ((*matches)[j].slot &&
			    (*matches)[j].slot == dmi_fields[i].field) {
				sprintf(alias + strlen(alias), ":%s*",
					dmi_fields[i].prefix);
				dmi_ascii_filter(alias + strlen(alias),
						 (*matches)[j].substr);
				strcat(alias, "*");
			}
		}
	}

	strcat(alias, ":");
	return 1;
}
ADD_TO_DEVTABLE("dmi", dmi_system_id, do_dmi_entry);

static int do_platform_entry(const char *filename,
			     void *symval, char *alias)
{
	DEF_FIELD_ADDR(symval, platform_device_id, name);
	sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
	return 1;
}
ADD_TO_DEVTABLE("platform", platform_device_id, do_platform_entry);

static int do_mdio_entry(const char *filename,
			 void *symval, char *alias)
{
	int i;
	DEF_FIELD(symval, mdio_device_id, phy_id);
	DEF_FIELD(symval, mdio_device_id, phy_id_mask);

	alias += sprintf(alias, MDIO_MODULE_PREFIX);

	for (i = 0; i < 32; i++) {
		if (!((phy_id_mask >> (31-i)) & 1))
			*(alias++) = '?';
		else if ((phy_id >> (31-i)) & 1)
			*(alias++) = '1';
		else
			*(alias++) = '0';
	}

	/* Terminate the string */
	*alias = 0;

	return 1;
}
ADD_TO_DEVTABLE("mdio", mdio_device_id, do_mdio_entry);

/* Looks like: zorro:iN. */
static int do_zorro_entry(const char *filename, void *symval,
			  char *alias)
{
	DEF_FIELD(symval, zorro_device_id, id);
	strcpy(alias, "zorro:");
	ADD(alias, "i", id != ZORRO_WILDCARD, id);
	return 1;
}
ADD_TO_DEVTABLE("zorro", zorro_device_id, do_zorro_entry);

/* looks like: "pnp:dD" */
static int do_isapnp_entry(const char *filename,
			   void *symval, char *alias)
{
	DEF_FIELD(symval, isapnp_device_id, vendor);
	DEF_FIELD(symval, isapnp_device_id, function);
	sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
		'A' + ((vendor >> 2) & 0x3f) - 1,
		'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
		'A' + ((vendor >> 8) & 0x1f) - 1,
		(function >> 4) & 0x0f, function & 0x0f,
		(function >> 12) & 0x0f, (function >> 8) & 0x0f);
	return 1;
}
ADD_TO_DEVTABLE("isapnp", isapnp_device_id, do_isapnp_entry);

/* Looks like: "ipack:fNvNdN". */
static int do_ipack_entry(const char *filename,
			  void *symval, char *alias)
{
	DEF_FIELD(symval, ipack_device_id, format);
	DEF_FIELD(symval, ipack_device_id, vendor);
	DEF_FIELD(symval, ipack_device_id, device);
	strcpy(alias, "ipack:");
	ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
	ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
	ADD(alias, "d", device != IPACK_ANY_ID, device);
	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("ipack", ipack_device_id, do_ipack_entry);

/*
 * Append a match expression for a single masked hex digit.
 * outp points to a pointer to the character at which to append.
 *	*outp is updated on return to point just after the appended text,
 *	to facilitate further appending.
 */
static void append_nibble_mask(char **outp,
			       unsigned int nibble, unsigned int mask)
{
	char *p = *outp;
	unsigned int i;

	switch (mask) {
	case 0:
		*p++ = '?';
		break;

	case 0xf:
		p += sprintf(p, "%X",  nibble);
		break;

	default:
		/*
		 * Dumbly emit a match pattern for all possible matching
		 * digits.  This could be improved in some cases using ranges,
		 * but it has the advantage of being trivially correct, and is
		 * often optimal.
		 */
		*p++ = '[';
		for (i = 0; i < 0x10; i++)
			if ((i & mask) == nibble)
				p += sprintf(p, "%X", i);
		*p++ = ']';
	}

	/* Ensure that the string remains NUL-terminated: */
	*p = '\0';

	/* Advance the caller's end-of-string pointer: */
	*outp = p;
}

/*
 * looks like: "amba:dN"
 *
 * N is exactly 8 digits, where each is an upper-case hex digit, or
 *	a ? or [] pattern matching exactly one digit.
 */
static int do_amba_entry(const char *filename,
			 void *symval, char *alias)
{
	unsigned int digit;
	char *p = alias;
	DEF_FIELD(symval, amba_id, id);
	DEF_FIELD(symval, amba_id, mask);

	if ((id & mask) != id)
		fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: "
		      "id=0x%08X, mask=0x%08X.  Please fix this driver.\n",
		      filename, id, mask);

	p += sprintf(alias, "amba:d");
	for (digit = 0; digit < 8; digit++)
		append_nibble_mask(&p,
				   (id >> (4 * (7 - digit))) & 0xf,
				   (mask >> (4 * (7 - digit))) & 0xf);

	return 1;
}
ADD_TO_DEVTABLE("amba", amba_id, do_amba_entry);

/*
 * looks like: "mipscdmm:tN"
 *
 * N is exactly 2 digits, where each is an upper-case hex digit, or
 *	a ? or [] pattern matching exactly one digit.
 */
static int do_mips_cdmm_entry(const char *filename,
			      void *symval, char *alias)
{
	DEF_FIELD(symval, mips_cdmm_device_id, type);

	sprintf(alias, "mipscdmm:t%02X*", type);
	return 1;
}
ADD_TO_DEVTABLE("mipscdmm", mips_cdmm_device_id, do_mips_cdmm_entry);

/* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
 * All fields are numbers. It would be nicer to use strings for vendor
 * and feature, but getting those out of the build system here is too
 * complicated.
 */

static int do_x86cpu_entry(const char *filename, void *symval,
			   char *alias)
{
	DEF_FIELD(symval, x86_cpu_id, feature);
	DEF_FIELD(symval, x86_cpu_id, family);
	DEF_FIELD(symval, x86_cpu_id, model);
	DEF_FIELD(symval, x86_cpu_id, vendor);

	strcpy(alias, "cpu:type:x86,");
	ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor);
	ADD(alias, "fam", family != X86_FAMILY_ANY, family);
	ADD(alias, "mod", model  != X86_MODEL_ANY,  model);
	strcat(alias, ":feature:*");
	if (feature != X86_FEATURE_ANY)
		sprintf(alias + strlen(alias), "%04X*", feature);
	return 1;
}
ADD_TO_DEVTABLE("x86cpu", x86_cpu_id, do_x86cpu_entry);

/* LOOKS like cpu:type:*:feature:*FEAT* */
static int do_cpu_entry(const char *filename, void *symval, char *alias)
{
	DEF_FIELD(symval, cpu_feature, feature);

	sprintf(alias, "cpu:type:*:feature:*%04X*", feature);
	return 1;
}
ADD_TO_DEVTABLE("cpu", cpu_feature, do_cpu_entry);

/* Looks like: mei:S:uuid */
static int do_mei_entry(const char *filename, void *symval,
			char *alias)
{
	DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
	DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid);

	sprintf(alias, MEI_CL_MODULE_PREFIX);
	sprintf(alias + strlen(alias), "%s:",  (*name)[0]  ? *name : "*");
	add_uuid(alias, *uuid);

	strcat(alias, ":*");

	return 1;
}
ADD_TO_DEVTABLE("mei", mei_cl_device_id, do_mei_entry);

/* Looks like: rapidio:vNdNavNadN */
static int do_rio_entry(const char *filename,
			void *symval, char *alias)
{
	DEF_FIELD(symval, rio_device_id, did);
	DEF_FIELD(symval, rio_device_id, vid);
	DEF_FIELD(symval, rio_device_id, asm_did);
	DEF_FIELD(symval, rio_device_id, asm_vid);

	strcpy(alias, "rapidio:");
	ADD(alias, "v", vid != RIO_ANY_ID, vid);
	ADD(alias, "d", did != RIO_ANY_ID, did);
	ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
	ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);

	add_wildcard(alias);
	return 1;
}
ADD_TO_DEVTABLE("rapidio", rio_device_id, do_rio_entry);

/* Does namelen bytes of name exactly match the symbol? */
static bool sym_is(const char *name, unsigned namelen, const char *symbol)
{
	if (namelen != strlen(symbol))
		return false;

	return memcmp(name, symbol, namelen) == 0;
}

static void do_table(void *symval, unsigned long size,
		     unsigned long id_size,
		     const char *device_id,
		     void *function,
		     struct module *mod)
{
	unsigned int i;
	char alias[500];
	int (*do_entry)(const char *, void *entry, char *alias) = function;

	device_id_check(mod->name, device_id, size, id_size, symval);
	/* Leave last one: it's the terminator. */
	size -= id_size;

	for (i = 0; i < size; i += id_size) {
		if (do_entry(mod->name, symval+i, alias)) {
			buf_printf(&mod->dev_table_buf,
				   "MODULE_ALIAS(\"%s\");\n", alias);
		}
	}
}

/* Create MODULE_ALIAS() statements.
 * At this time, we cannot write the actual output C source yet,
 * so we write into the mod->dev_table_buf buffer. */
void handle_moddevtable(struct module *mod, struct elf_info *info,
			Elf_Sym *sym, const char *symname)
{
	void *symval;
	char *zeros = NULL;
	const char *name, *identifier;
	unsigned int namelen;

	/* We're looking for a section relative symbol */
	if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
		return;

	/* We're looking for an object */
	if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
		return;

	/* All our symbols are of form <prefix>__mod_<name>__<identifier>_device_table. */
	name = strstr(symname, "__mod_");
	if (!name)
		return;
	name += strlen("__mod_");
	namelen = strlen(name);
	if (namelen < strlen("_device_table"))
		return;
	if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
		return;
	identifier = strstr(name, "__");
	if (!identifier)
		return;
	namelen = identifier - name;

	/* Handle all-NULL symbols allocated into .bss */
	if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
		zeros = calloc(1, sym->st_size);
		symval = zeros;
	} else {
		symval = (void *)info->hdr
			+ info->sechdrs[get_secindex(info, sym)].sh_offset
			+ sym->st_value;
	}

	/* First handle the "special" cases */
	if (sym_is(name, namelen, "usb"))
		do_usb_table(symval, sym->st_size, mod);
	else if (sym_is(name, namelen, "pnp"))
		do_pnp_device_entry(symval, sym->st_size, mod);
	else if (sym_is(name, namelen, "pnp_card"))
		do_pnp_card_entries(symval, sym->st_size, mod);
	else {
		struct devtable **p;
		INIT_SECTION(__devtable);

		for (p = __start___devtable; p < __stop___devtable; p++) {
			if (sym_is(name, namelen, (*p)->device_id)) {
				do_table(symval, sym->st_size, (*p)->id_size,
					 (*p)->device_id, (*p)->function, mod);
				break;
			}
		}
	}
	free(zeros);
}

/* Now add out buffered information to the generated C source */
void add_moddevtable(struct buffer *buf, struct module *mod)
{
	buf_printf(buf, "\n");
	buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
	free(mod->dev_table_buf.p);
}