projects/linux·blob v3.14 · refs

1270 lines · 37.1 KiB

1/* Simple code to turn various tables in an ELF file into alias definitions.
2 * This deals with kernel datastructures where they should be
3 * dealt with: in the kernel source.
4 *
5 * Copyright 2002-2003 Rusty Russell, IBM Corporation
6 * 2003 Kai Germaschewski
7 *
8 *
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
11 */
12
13#include "modpost.h"
14#include "devicetable-offsets.h"
15
16/* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
17 * use either stdint.h or inttypes.h for the rest. */
18#if KERNEL_ELFCLASS == ELFCLASS32
19typedef Elf32_Addr kernel_ulong_t;
20#define BITS_PER_LONG 32
21#else
22typedef Elf64_Addr kernel_ulong_t;
23#define BITS_PER_LONG 64
24#endif
25#ifdef __sun__
26#include <inttypes.h>
27#else
28#include <stdint.h>
29#endif
30
31#include <ctype.h>
32#include <stdbool.h>
33
34typedef uint32_t __u32;
35typedef uint16_t __u16;
36typedef unsigned char __u8;
37
38/* Big exception to the "don't include kernel headers into userspace, which
39 * even potentially has different endianness and word sizes, since
40 * we handle those differences explicitly below */
41#include "../../include/linux/mod_devicetable.h"
42
43/* This array collects all instances that use the generic do_table */
44struct devtable {
45 const char *device_id; /* name of table, __mod_<name>_device_table. */
46 unsigned long id_size;
47 void *function;
48};
49
50#define ___cat(a,b) a ## b
51#define __cat(a,b) ___cat(a,b)
52
53/* we need some special handling for this host tool running eventually on
54 * Darwin. The Mach-O section handling is a bit different than ELF section
55 * handling. The differnces in detail are:
56 * a) we have segments which have sections
57 * b) we need a API call to get the respective section symbols */
58#if defined(__MACH__)
59#include <mach-o/getsect.h>
60
61#define INIT_SECTION(name) do { \
62 unsigned long name ## _len; \
63 char *__cat(pstart_,name) = getsectdata("__TEXT", \
64 #name, &__cat(name,_len)); \
65 char *__cat(pstop_,name) = __cat(pstart_,name) + \
66 __cat(name, _len); \
67 __cat(__start_,name) = (void *)__cat(pstart_,name); \
68 __cat(__stop_,name) = (void *)__cat(pstop_,name); \
69 } while (0)
70#define SECTION(name) __attribute__((section("__TEXT, " #name)))
71
72struct devtable **__start___devtable, **__stop___devtable;
73#else
74#define INIT_SECTION(name) /* no-op for ELF */
75#define SECTION(name) __attribute__((section(#name)))
76
77/* We construct a table of pointers in an ELF section (pointers generally
78 * go unpadded by gcc). ld creates boundary syms for us. */
79extern struct devtable *__start___devtable[], *__stop___devtable[];
80#endif /* __MACH__ */
81
82#if !defined(__used)
83# if __GNUC__ == 3 && __GNUC_MINOR__ < 3
84# define __used __attribute__((__unused__))
85# else
86# define __used __attribute__((__used__))
87# endif
88#endif
89
90/* Define a variable f that holds the value of field f of struct devid
91 * based at address m.
92 */
93#define DEF_FIELD(m, devid, f) \
94 typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))
95/* Define a variable f that holds the address of field f of struct devid
96 * based at address m. Due to the way typeof works, for a field of type
97 * T[N] the variable has type T(*)[N], _not_ T*.
98 */
99#define DEF_FIELD_ADDR(m, devid, f) \
100 typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f)
101
102/* Add a table entry. We test function type matches while we're here. */
103#define ADD_TO_DEVTABLE(device_id, type, function) \
104 static struct devtable __cat(devtable,__LINE__) = { \
105 device_id + 0*sizeof((function)((const char *)NULL, \
106 (void *)NULL, \
107 (char *)NULL)), \
108 SIZE_##type, (function) }; \
109 static struct devtable *SECTION(__devtable) __used \
110 __cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__)
111
112#define ADD(str, sep, cond, field) \
113do { \
114 strcat(str, sep); \
115 if (cond) \
116 sprintf(str + strlen(str), \
117 sizeof(field) == 1 ? "%02X" : \
118 sizeof(field) == 2 ? "%04X" : \
119 sizeof(field) == 4 ? "%08X" : "", \
120 field); \
121 else \
122 sprintf(str + strlen(str), "*"); \
123} while(0)
124
125/* Always end in a wildcard, for future extension */
126static inline void add_wildcard(char *str)
127{
128 int len = strlen(str);
129
130 if (str[len - 1] != '*')
131 strcat(str + len, "*");
132}
133
134/**
135 * Check that sizeof(device_id type) are consistent with size of section
136 * in .o file. If in-consistent then userspace and kernel does not agree
137 * on actual size which is a bug.
138 * Also verify that the final entry in the table is all zeros.
139 * Ignore both checks if build host differ from target host and size differs.
140 **/
141static void device_id_check(const char *modname, const char *device_id,
142 unsigned long size, unsigned long id_size,
143 void *symval)
144{
145 int i;
146
147 if (size % id_size || size < id_size) {
148 fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
149 "of the size of section __mod_%s_device_table=%lu.\n"
150 "Fix definition of struct %s_device_id "
151 "in mod_devicetable.h\n",
152 modname, device_id, id_size, device_id, size, device_id);
153 }
154 /* Verify last one is a terminator */
155 for (i = 0; i < id_size; i++ ) {
156 if (*(uint8_t*)(symval+size-id_size+i)) {
157 fprintf(stderr,"%s: struct %s_device_id is %lu bytes. "
158 "The last of %lu is:\n",
159 modname, device_id, id_size, size / id_size);
160 for (i = 0; i < id_size; i++ )
161 fprintf(stderr,"0x%02x ",
162 *(uint8_t*)(symval+size-id_size+i) );
163 fprintf(stderr,"\n");
164 fatal("%s: struct %s_device_id is not terminated "
165 "with a NULL entry!\n", modname, device_id);
166 }
167 }
168}
169
170/* USB is special because the bcdDevice can be matched against a numeric range */
171/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */
172static void do_usb_entry(void *symval,
173 unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
174 unsigned char range_lo, unsigned char range_hi,
175 unsigned char max, struct module *mod)
176{
177 char alias[500];
178 DEF_FIELD(symval, usb_device_id, match_flags);
179 DEF_FIELD(symval, usb_device_id, idVendor);
180 DEF_FIELD(symval, usb_device_id, idProduct);
181 DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
182 DEF_FIELD(symval, usb_device_id, bDeviceClass);
183 DEF_FIELD(symval, usb_device_id, bDeviceSubClass);
184 DEF_FIELD(symval, usb_device_id, bDeviceProtocol);
185 DEF_FIELD(symval, usb_device_id, bInterfaceClass);
186 DEF_FIELD(symval, usb_device_id, bInterfaceSubClass);
187 DEF_FIELD(symval, usb_device_id, bInterfaceProtocol);
188 DEF_FIELD(symval, usb_device_id, bInterfaceNumber);
189
190 strcpy(alias, "usb:");
191 ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR,
192 idVendor);
193 ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
194 idProduct);
195
196 strcat(alias, "d");
197 if (bcdDevice_initial_digits)
198 sprintf(alias + strlen(alias), "%0*X",
199 bcdDevice_initial_digits, bcdDevice_initial);
200 if (range_lo == range_hi)
201 sprintf(alias + strlen(alias), "%X", range_lo);
202 else if (range_lo > 0 || range_hi < max) {
203 if (range_lo > 0x9 || range_hi < 0xA)
204 sprintf(alias + strlen(alias),
205 "[%X-%X]",
206 range_lo,
207 range_hi);
208 else {
209 sprintf(alias + strlen(alias),
210 range_lo < 0x9 ? "[%X-9" : "[%X",
211 range_lo);
212 sprintf(alias + strlen(alias),
213 range_hi > 0xA ? "A-%X]" : "%X]",
214 range_hi);
215 }
216 }
217 if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1))
218 strcat(alias, "*");
219
220 ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
221 bDeviceClass);
222 ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
223 bDeviceSubClass);
224 ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
225 bDeviceProtocol);
226 ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
227 bInterfaceClass);
228 ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
229 bInterfaceSubClass);
230 ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
231 bInterfaceProtocol);
232 ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
233 bInterfaceNumber);
234
235 add_wildcard(alias);
236 buf_printf(&mod->dev_table_buf,
237 "MODULE_ALIAS(\"%s\");\n", alias);
238}
239
240/* Handles increment/decrement of BCD formatted integers */
241/* Returns the previous value, so it works like i++ or i-- */
242static unsigned int incbcd(unsigned int *bcd,
243 int inc,
244 unsigned char max,
245 size_t chars)
246{
247 unsigned int init = *bcd, i, j;
248 unsigned long long c, dec = 0;
249
250 /* If bcd is not in BCD format, just increment */
251 if (max > 0x9) {
252 *bcd += inc;
253 return init;
254 }
255
256 /* Convert BCD to Decimal */
257 for (i=0 ; i < chars ; i++) {
258 c = (*bcd >> (i << 2)) & 0xf;
259 c = c > 9 ? 9 : c; /* force to bcd just in case */
260 for (j=0 ; j < i ; j++)
261 c = c * 10;
262 dec += c;
263 }
264
265 /* Do our increment/decrement */
266 dec += inc;
267 *bcd = 0;
268
269 /* Convert back to BCD */
270 for (i=0 ; i < chars ; i++) {
271 for (c=1,j=0 ; j < i ; j++)
272 c = c * 10;
273 c = (dec / c) % 10;
274 *bcd += c << (i << 2);
275 }
276 return init;
277}
278
279static void do_usb_entry_multi(void *symval, struct module *mod)
280{
281 unsigned int devlo, devhi;
282 unsigned char chi, clo, max;
283 int ndigits;
284
285 DEF_FIELD(symval, usb_device_id, match_flags);
286 DEF_FIELD(symval, usb_device_id, idVendor);
287 DEF_FIELD(symval, usb_device_id, idProduct);
288 DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
289 DEF_FIELD(symval, usb_device_id, bcdDevice_hi);
290 DEF_FIELD(symval, usb_device_id, bDeviceClass);
291 DEF_FIELD(symval, usb_device_id, bInterfaceClass);
292
293 devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
294 bcdDevice_lo : 0x0U;
295 devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
296 bcdDevice_hi : ~0x0U;
297
298 /* Figure out if this entry is in bcd or hex format */
299 max = 0x9; /* Default to decimal format */
300 for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) {
301 clo = (devlo >> (ndigits << 2)) & 0xf;
302 chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
303 if (clo > max || chi > max) {
304 max = 0xf;
305 break;
306 }
307 }
308
309 /*
310 * Some modules (visor) have empty slots as placeholder for
311 * run-time specification that results in catch-all alias
312 */
313 if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass))
314 return;
315
316 /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
317 for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
318 clo = devlo & 0xf;
319 chi = devhi & 0xf;
320 if (chi > max) /* If we are in bcd mode, truncate if necessary */
321 chi = max;
322 devlo >>= 4;
323 devhi >>= 4;
324
325 if (devlo == devhi || !ndigits) {
326 do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod);
327 break;
328 }
329
330 if (clo > 0x0)
331 do_usb_entry(symval,
332 incbcd(&devlo, 1, max,
333 sizeof(bcdDevice_lo) * 2),
334 ndigits, clo, max, max, mod);
335
336 if (chi < max)
337 do_usb_entry(symval,
338 incbcd(&devhi, -1, max,
339 sizeof(bcdDevice_lo) * 2),
340 ndigits, 0x0, chi, max, mod);
341 }
342}
343
344static void do_usb_table(void *symval, unsigned long size,
345 struct module *mod)
346{
347 unsigned int i;
348 const unsigned long id_size = SIZE_usb_device_id;
349
350 device_id_check(mod->name, "usb", size, id_size, symval);
351
352 /* Leave last one: it's the terminator. */
353 size -= id_size;
354
355 for (i = 0; i < size; i += id_size)
356 do_usb_entry_multi(symval + i, mod);
357}
358
359/* Looks like: hid:bNvNpN */
360static int do_hid_entry(const char *filename,
361 void *symval, char *alias)
362{
363 DEF_FIELD(symval, hid_device_id, bus);
364 DEF_FIELD(symval, hid_device_id, group);
365 DEF_FIELD(symval, hid_device_id, vendor);
366 DEF_FIELD(symval, hid_device_id, product);
367
368 sprintf(alias, "hid:");
369 ADD(alias, "b", bus != HID_BUS_ANY, bus);
370 ADD(alias, "g", group != HID_GROUP_ANY, group);
371 ADD(alias, "v", vendor != HID_ANY_ID, vendor);
372 ADD(alias, "p", product != HID_ANY_ID, product);
373
374 return 1;
375}
376ADD_TO_DEVTABLE("hid", hid_device_id, do_hid_entry);
377
378/* Looks like: ieee1394:venNmoNspNverN */
379static int do_ieee1394_entry(const char *filename,
380 void *symval, char *alias)
381{
382 DEF_FIELD(symval, ieee1394_device_id, match_flags);
383 DEF_FIELD(symval, ieee1394_device_id, vendor_id);
384 DEF_FIELD(symval, ieee1394_device_id, model_id);
385 DEF_FIELD(symval, ieee1394_device_id, specifier_id);
386 DEF_FIELD(symval, ieee1394_device_id, version);
387
388 strcpy(alias, "ieee1394:");
389 ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID,
390 vendor_id);
391 ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID,
392 model_id);
393 ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID,
394 specifier_id);
395 ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION,
396 version);
397
398 add_wildcard(alias);
399 return 1;
400}
401ADD_TO_DEVTABLE("ieee1394", ieee1394_device_id, do_ieee1394_entry);
402
403/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
404static int do_pci_entry(const char *filename,
405 void *symval, char *alias)
406{
407 /* Class field can be divided into these three. */
408 unsigned char baseclass, subclass, interface,
409 baseclass_mask, subclass_mask, interface_mask;
410
411 DEF_FIELD(symval, pci_device_id, vendor);
412 DEF_FIELD(symval, pci_device_id, device);
413 DEF_FIELD(symval, pci_device_id, subvendor);
414 DEF_FIELD(symval, pci_device_id, subdevice);
415 DEF_FIELD(symval, pci_device_id, class);
416 DEF_FIELD(symval, pci_device_id, class_mask);
417
418 strcpy(alias, "pci:");
419 ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
420 ADD(alias, "d", device != PCI_ANY_ID, device);
421 ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
422 ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);
423
424 baseclass = (class) >> 16;
425 baseclass_mask = (class_mask) >> 16;
426 subclass = (class) >> 8;
427 subclass_mask = (class_mask) >> 8;
428 interface = class;
429 interface_mask = class_mask;
430
431 if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
432 || (subclass_mask != 0 && subclass_mask != 0xFF)
433 || (interface_mask != 0 && interface_mask != 0xFF)) {
434 warn("Can't handle masks in %s:%04X\n",
435 filename, class_mask);
436 return 0;
437 }
438
439 ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
440 ADD(alias, "sc", subclass_mask == 0xFF, subclass);
441 ADD(alias, "i", interface_mask == 0xFF, interface);
442 add_wildcard(alias);
443 return 1;
444}
445ADD_TO_DEVTABLE("pci", pci_device_id, do_pci_entry);
446
447/* looks like: "ccw:tNmNdtNdmN" */
448static int do_ccw_entry(const char *filename,
449 void *symval, char *alias)
450{
451 DEF_FIELD(symval, ccw_device_id, match_flags);
452 DEF_FIELD(symval, ccw_device_id, cu_type);
453 DEF_FIELD(symval, ccw_device_id, cu_model);
454 DEF_FIELD(symval, ccw_device_id, dev_type);
455 DEF_FIELD(symval, ccw_device_id, dev_model);
456
457 strcpy(alias, "ccw:");
458 ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
459 cu_type);
460 ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
461 cu_model);
462 ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
463 dev_type);
464 ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
465 dev_model);
466 add_wildcard(alias);
467 return 1;
468}
469ADD_TO_DEVTABLE("ccw", ccw_device_id, do_ccw_entry);
470
471/* looks like: "ap:tN" */
472static int do_ap_entry(const char *filename,
473 void *symval, char *alias)
474{
475 DEF_FIELD(symval, ap_device_id, dev_type);
476
477 sprintf(alias, "ap:t%02X*", dev_type);
478 return 1;
479}
480ADD_TO_DEVTABLE("ap", ap_device_id, do_ap_entry);
481
482/* looks like: "css:tN" */
483static int do_css_entry(const char *filename,
484 void *symval, char *alias)
485{
486 DEF_FIELD(symval, css_device_id, type);
487
488 sprintf(alias, "css:t%01X", type);
489 return 1;
490}
491ADD_TO_DEVTABLE("css", css_device_id, do_css_entry);
492
493/* Looks like: "serio:tyNprNidNexN" */
494static int do_serio_entry(const char *filename,
495 void *symval, char *alias)
496{
497 DEF_FIELD(symval, serio_device_id, type);
498 DEF_FIELD(symval, serio_device_id, proto);
499 DEF_FIELD(symval, serio_device_id, id);
500 DEF_FIELD(symval, serio_device_id, extra);
501
502 strcpy(alias, "serio:");
503 ADD(alias, "ty", type != SERIO_ANY, type);
504 ADD(alias, "pr", proto != SERIO_ANY, proto);
505 ADD(alias, "id", id != SERIO_ANY, id);
506 ADD(alias, "ex", extra != SERIO_ANY, extra);
507
508 add_wildcard(alias);
509 return 1;
510}
511ADD_TO_DEVTABLE("serio", serio_device_id, do_serio_entry);
512
513/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
514static int do_acpi_entry(const char *filename,
515 void *symval, char *alias)
516{
517 DEF_FIELD_ADDR(symval, acpi_device_id, id);
518 sprintf(alias, "acpi*:%s:*", *id);
519 return 1;
520}
521ADD_TO_DEVTABLE("acpi", acpi_device_id, do_acpi_entry);
522
523/* looks like: "pnp:dD" */
524static void do_pnp_device_entry(void *symval, unsigned long size,
525 struct module *mod)
526{
527 const unsigned long id_size = SIZE_pnp_device_id;
528 const unsigned int count = (size / id_size)-1;
529 unsigned int i;
530
531 device_id_check(mod->name, "pnp", size, id_size, symval);
532
533 for (i = 0; i < count; i++) {
534 DEF_FIELD_ADDR(symval + i*id_size, pnp_device_id, id);
535 char acpi_id[sizeof(*id)];
536 int j;
537
538 buf_printf(&mod->dev_table_buf,
539 "MODULE_ALIAS(\"pnp:d%s*\");\n", *id);
540
541 /* fix broken pnp bus lowercasing */
542 for (j = 0; j < sizeof(acpi_id); j++)
543 acpi_id[j] = toupper((*id)[j]);
544 buf_printf(&mod->dev_table_buf,
545 "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
546 }
547}
548
549/* looks like: "pnp:dD" for every device of the card */
550static void do_pnp_card_entries(void *symval, unsigned long size,
551 struct module *mod)
552{
553 const unsigned long id_size = SIZE_pnp_card_device_id;
554 const unsigned int count = (size / id_size)-1;
555 unsigned int i;
556
557 device_id_check(mod->name, "pnp", size, id_size, symval);
558
559 for (i = 0; i < count; i++) {
560 unsigned int j;
561 DEF_FIELD_ADDR(symval + i*id_size, pnp_card_device_id, devs);
562
563 for (j = 0; j < PNP_MAX_DEVICES; j++) {
564 const char *id = (char *)(*devs)[j].id;
565 int i2, j2;
566 int dup = 0;
567
568 if (!id[0])
569 break;
570
571 /* find duplicate, already added value */
572 for (i2 = 0; i2 < i && !dup; i2++) {
573 DEF_FIELD_ADDR(symval + i2*id_size, pnp_card_device_id, devs);
574
575 for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
576 const char *id2 = (char *)(*devs)[j2].id;
577
578 if (!id2[0])
579 break;
580
581 if (!strcmp(id, id2)) {
582 dup = 1;
583 break;
584 }
585 }
586 }
587
588 /* add an individual alias for every device entry */
589 if (!dup) {
590 char acpi_id[PNP_ID_LEN];
591 int k;
592
593 buf_printf(&mod->dev_table_buf,
594 "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
595
596 /* fix broken pnp bus lowercasing */
597 for (k = 0; k < sizeof(acpi_id); k++)
598 acpi_id[k] = toupper(id[k]);
599 buf_printf(&mod->dev_table_buf,
600 "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
601 }
602 }
603 }
604}
605
606/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
607static int do_pcmcia_entry(const char *filename,
608 void *symval, char *alias)
609{
610 unsigned int i;
611 DEF_FIELD(symval, pcmcia_device_id, match_flags);
612 DEF_FIELD(symval, pcmcia_device_id, manf_id);
613 DEF_FIELD(symval, pcmcia_device_id, card_id);
614 DEF_FIELD(symval, pcmcia_device_id, func_id);
615 DEF_FIELD(symval, pcmcia_device_id, function);
616 DEF_FIELD(symval, pcmcia_device_id, device_no);
617 DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
618
619 for (i=0; i<4; i++) {
620 (*prod_id_hash)[i] = TO_NATIVE((*prod_id_hash)[i]);
621 }
622
623 strcpy(alias, "pcmcia:");
624 ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
625 manf_id);
626 ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
627 card_id);
628 ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
629 func_id);
630 ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
631 function);
632 ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
633 device_no);
634 ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, (*prod_id_hash)[0]);
635 ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, (*prod_id_hash)[1]);
636 ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, (*prod_id_hash)[2]);
637 ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, (*prod_id_hash)[3]);
638
639 add_wildcard(alias);
640 return 1;
641}
642ADD_TO_DEVTABLE("pcmcia", pcmcia_device_id, do_pcmcia_entry);
643
644static int do_of_entry (const char *filename, void *symval, char *alias)
645{
646 int len;
647 char *tmp;
648 DEF_FIELD_ADDR(symval, of_device_id, name);
649 DEF_FIELD_ADDR(symval, of_device_id, type);
650 DEF_FIELD_ADDR(symval, of_device_id, compatible);
651
652 len = sprintf (alias, "of:N%sT%s",
653 (*name)[0] ? *name : "*",
654 (*type)[0] ? *type : "*");
655
656 if (compatible[0])
657 sprintf (&alias[len], "%sC%s",
658 (*type)[0] ? "*" : "",
659 *compatible);
660
661 /* Replace all whitespace with underscores */
662 for (tmp = alias; tmp && *tmp; tmp++)
663 if (isspace (*tmp))
664 *tmp = '_';
665
666 add_wildcard(alias);
667 return 1;
668}
669ADD_TO_DEVTABLE("of", of_device_id, do_of_entry);
670
671static int do_vio_entry(const char *filename, void *symval,
672 char *alias)
673{
674 char *tmp;
675 DEF_FIELD_ADDR(symval, vio_device_id, type);
676 DEF_FIELD_ADDR(symval, vio_device_id, compat);
677
678 sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
679 (*compat)[0] ? *compat : "*");
680
681 /* Replace all whitespace with underscores */
682 for (tmp = alias; tmp && *tmp; tmp++)
683 if (isspace (*tmp))
684 *tmp = '_';
685
686 add_wildcard(alias);
687 return 1;
688}
689ADD_TO_DEVTABLE("vio", vio_device_id, do_vio_entry);
690
691#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
692
693static void do_input(char *alias,
694 kernel_ulong_t *arr, unsigned int min, unsigned int max)
695{
696 unsigned int i;
697
698 for (i = min / BITS_PER_LONG; i < max / BITS_PER_LONG + 1; i++)
699 arr[i] = TO_NATIVE(arr[i]);
700 for (i = min; i < max; i++)
701 if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
702 sprintf(alias + strlen(alias), "%X,*", i);
703}
704
705/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
706static int do_input_entry(const char *filename, void *symval,
707 char *alias)
708{
709 DEF_FIELD(symval, input_device_id, flags);
710 DEF_FIELD(symval, input_device_id, bustype);
711 DEF_FIELD(symval, input_device_id, vendor);
712 DEF_FIELD(symval, input_device_id, product);
713 DEF_FIELD(symval, input_device_id, version);
714 DEF_FIELD_ADDR(symval, input_device_id, evbit);
715 DEF_FIELD_ADDR(symval, input_device_id, keybit);
716 DEF_FIELD_ADDR(symval, input_device_id, relbit);
717 DEF_FIELD_ADDR(symval, input_device_id, absbit);
718 DEF_FIELD_ADDR(symval, input_device_id, mscbit);
719 DEF_FIELD_ADDR(symval, input_device_id, ledbit);
720 DEF_FIELD_ADDR(symval, input_device_id, sndbit);
721 DEF_FIELD_ADDR(symval, input_device_id, ffbit);
722 DEF_FIELD_ADDR(symval, input_device_id, swbit);
723
724 sprintf(alias, "input:");
725
726 ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
727 ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
728 ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
729 ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);
730
731 sprintf(alias + strlen(alias), "-e*");
732 if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
733 do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
734 sprintf(alias + strlen(alias), "k*");
735 if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
736 do_input(alias, *keybit,
737 INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
738 INPUT_DEVICE_ID_KEY_MAX);
739 sprintf(alias + strlen(alias), "r*");
740 if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
741 do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
742 sprintf(alias + strlen(alias), "a*");
743 if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
744 do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
745 sprintf(alias + strlen(alias), "m*");
746 if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
747 do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
748 sprintf(alias + strlen(alias), "l*");
749 if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
750 do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
751 sprintf(alias + strlen(alias), "s*");
752 if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
753 do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
754 sprintf(alias + strlen(alias), "f*");
755 if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
756 do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
757 sprintf(alias + strlen(alias), "w*");
758 if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
759 do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
760 return 1;
761}
762ADD_TO_DEVTABLE("input", input_device_id, do_input_entry);
763
764static int do_eisa_entry(const char *filename, void *symval,
765 char *alias)
766{
767 DEF_FIELD_ADDR(symval, eisa_device_id, sig);
768 if (sig[0])
769 sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", *sig);
770 else
771 strcat(alias, "*");
772 return 1;
773}
774ADD_TO_DEVTABLE("eisa", eisa_device_id, do_eisa_entry);
775
776/* Looks like: parisc:tNhvNrevNsvN */
777static int do_parisc_entry(const char *filename, void *symval,
778 char *alias)
779{
780 DEF_FIELD(symval, parisc_device_id, hw_type);
781 DEF_FIELD(symval, parisc_device_id, hversion);
782 DEF_FIELD(symval, parisc_device_id, hversion_rev);
783 DEF_FIELD(symval, parisc_device_id, sversion);
784
785 strcpy(alias, "parisc:");
786 ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
787 ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
788 ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
789 ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);
790
791 add_wildcard(alias);
792 return 1;
793}
794ADD_TO_DEVTABLE("parisc", parisc_device_id, do_parisc_entry);
795
796/* Looks like: sdio:cNvNdN. */
797static int do_sdio_entry(const char *filename,
798 void *symval, char *alias)
799{
800 DEF_FIELD(symval, sdio_device_id, class);
801 DEF_FIELD(symval, sdio_device_id, vendor);
802 DEF_FIELD(symval, sdio_device_id, device);
803
804 strcpy(alias, "sdio:");
805 ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
806 ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
807 ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
808 add_wildcard(alias);
809 return 1;
810}
811ADD_TO_DEVTABLE("sdio", sdio_device_id, do_sdio_entry);
812
813/* Looks like: ssb:vNidNrevN. */
814static int do_ssb_entry(const char *filename,
815 void *symval, char *alias)
816{
817 DEF_FIELD(symval, ssb_device_id, vendor);
818 DEF_FIELD(symval, ssb_device_id, coreid);
819 DEF_FIELD(symval, ssb_device_id, revision);
820
821 strcpy(alias, "ssb:");
822 ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
823 ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
824 ADD(alias, "rev", revision != SSB_ANY_REV, revision);
825 add_wildcard(alias);
826 return 1;
827}
828ADD_TO_DEVTABLE("ssb", ssb_device_id, do_ssb_entry);
829
830/* Looks like: bcma:mNidNrevNclN. */
831static int do_bcma_entry(const char *filename,
832 void *symval, char *alias)
833{
834 DEF_FIELD(symval, bcma_device_id, manuf);
835 DEF_FIELD(symval, bcma_device_id, id);
836 DEF_FIELD(symval, bcma_device_id, rev);
837 DEF_FIELD(symval, bcma_device_id, class);
838
839 strcpy(alias, "bcma:");
840 ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
841 ADD(alias, "id", id != BCMA_ANY_ID, id);
842 ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
843 ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
844 add_wildcard(alias);
845 return 1;
846}
847ADD_TO_DEVTABLE("bcma", bcma_device_id, do_bcma_entry);
848
849/* Looks like: virtio:dNvN */
850static int do_virtio_entry(const char *filename, void *symval,
851 char *alias)
852{
853 DEF_FIELD(symval, virtio_device_id, device);
854 DEF_FIELD(symval, virtio_device_id, vendor);
855
856 strcpy(alias, "virtio:");
857 ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
858 ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
859
860 add_wildcard(alias);
861 return 1;
862}
863ADD_TO_DEVTABLE("virtio", virtio_device_id, do_virtio_entry);
864
865/*
866 * Looks like: vmbus:guid
867 * Each byte of the guid will be represented by two hex characters
868 * in the name.
869 */
870
871static int do_vmbus_entry(const char *filename, void *symval,
872 char *alias)
873{
874 int i;
875 DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
876 char guid_name[(sizeof(*guid) + 1) * 2];
877
878 for (i = 0; i < (sizeof(*guid) * 2); i += 2)
879 sprintf(&guid_name[i], "%02x", TO_NATIVE((*guid)[i/2]));
880
881 strcpy(alias, "vmbus:");
882 strcat(alias, guid_name);
883
884 return 1;
885}
886ADD_TO_DEVTABLE("vmbus", hv_vmbus_device_id, do_vmbus_entry);
887
888/* Looks like: i2c:S */
889static int do_i2c_entry(const char *filename, void *symval,
890 char *alias)
891{
892 DEF_FIELD_ADDR(symval, i2c_device_id, name);
893 sprintf(alias, I2C_MODULE_PREFIX "%s", *name);
894
895 return 1;
896}
897ADD_TO_DEVTABLE("i2c", i2c_device_id, do_i2c_entry);
898
899/* Looks like: spi:S */
900static int do_spi_entry(const char *filename, void *symval,
901 char *alias)
902{
903 DEF_FIELD_ADDR(symval, spi_device_id, name);
904 sprintf(alias, SPI_MODULE_PREFIX "%s", *name);
905
906 return 1;
907}
908ADD_TO_DEVTABLE("spi", spi_device_id, do_spi_entry);
909
910static const struct dmifield {
911 const char *prefix;
912 int field;
913} dmi_fields[] = {
914 { "bvn", DMI_BIOS_VENDOR },
915 { "bvr", DMI_BIOS_VERSION },
916 { "bd", DMI_BIOS_DATE },
917 { "svn", DMI_SYS_VENDOR },
918 { "pn", DMI_PRODUCT_NAME },
919 { "pvr", DMI_PRODUCT_VERSION },
920 { "rvn", DMI_BOARD_VENDOR },
921 { "rn", DMI_BOARD_NAME },
922 { "rvr", DMI_BOARD_VERSION },
923 { "cvn", DMI_CHASSIS_VENDOR },
924 { "ct", DMI_CHASSIS_TYPE },
925 { "cvr", DMI_CHASSIS_VERSION },
926 { NULL, DMI_NONE }
927};
928
929static void dmi_ascii_filter(char *d, const char *s)
930{
931 /* Filter out characters we don't want to see in the modalias string */
932 for (; *s; s++)
933 if (*s > ' ' && *s < 127 && *s != ':')
934 *(d++) = *s;
935
936 *d = 0;
937}
938
939
940static int do_dmi_entry(const char *filename, void *symval,
941 char *alias)
942{
943 int i, j;
944 DEF_FIELD_ADDR(symval, dmi_system_id, matches);
945 sprintf(alias, "dmi*");
946
947 for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
948 for (j = 0; j < 4; j++) {
949 if ((*matches)[j].slot &&
950 (*matches)[j].slot == dmi_fields[i].field) {
951 sprintf(alias + strlen(alias), ":%s*",
952 dmi_fields[i].prefix);
953 dmi_ascii_filter(alias + strlen(alias),
954 (*matches)[j].substr);
955 strcat(alias, "*");
956 }
957 }
958 }
959
960 strcat(alias, ":");
961 return 1;
962}
963ADD_TO_DEVTABLE("dmi", dmi_system_id, do_dmi_entry);
964
965static int do_platform_entry(const char *filename,
966 void *symval, char *alias)
967{
968 DEF_FIELD_ADDR(symval, platform_device_id, name);
969 sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
970 return 1;
971}
972ADD_TO_DEVTABLE("platform", platform_device_id, do_platform_entry);
973
974static int do_mdio_entry(const char *filename,
975 void *symval, char *alias)
976{
977 int i;
978 DEF_FIELD(symval, mdio_device_id, phy_id);
979 DEF_FIELD(symval, mdio_device_id, phy_id_mask);
980
981 alias += sprintf(alias, MDIO_MODULE_PREFIX);
982
983 for (i = 0; i < 32; i++) {
984 if (!((phy_id_mask >> (31-i)) & 1))
985 *(alias++) = '?';
986 else if ((phy_id >> (31-i)) & 1)
987 *(alias++) = '1';
988 else
989 *(alias++) = '0';
990 }
991
992 /* Terminate the string */
993 *alias = 0;
994
995 return 1;
996}
997ADD_TO_DEVTABLE("mdio", mdio_device_id, do_mdio_entry);
998
999/* Looks like: zorro:iN. */
1000static int do_zorro_entry(const char *filename, void *symval,
1001 char *alias)
1002{
1003 DEF_FIELD(symval, zorro_device_id, id);
1004 strcpy(alias, "zorro:");
1005 ADD(alias, "i", id != ZORRO_WILDCARD, id);
1006 return 1;
1007}
1008ADD_TO_DEVTABLE("zorro", zorro_device_id, do_zorro_entry);
1009
1010/* looks like: "pnp:dD" */
1011static int do_isapnp_entry(const char *filename,
1012 void *symval, char *alias)
1013{
1014 DEF_FIELD(symval, isapnp_device_id, vendor);
1015 DEF_FIELD(symval, isapnp_device_id, function);
1016 sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
1017 'A' + ((vendor >> 2) & 0x3f) - 1,
1018 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
1019 'A' + ((vendor >> 8) & 0x1f) - 1,
1020 (function >> 4) & 0x0f, function & 0x0f,
1021 (function >> 12) & 0x0f, (function >> 8) & 0x0f);
1022 return 1;
1023}
1024ADD_TO_DEVTABLE("isapnp", isapnp_device_id, do_isapnp_entry);
1025
1026/* Looks like: "ipack:fNvNdN". */
1027static int do_ipack_entry(const char *filename,
1028 void *symval, char *alias)
1029{
1030 DEF_FIELD(symval, ipack_device_id, format);
1031 DEF_FIELD(symval, ipack_device_id, vendor);
1032 DEF_FIELD(symval, ipack_device_id, device);
1033 strcpy(alias, "ipack:");
1034 ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
1035 ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
1036 ADD(alias, "d", device != IPACK_ANY_ID, device);
1037 add_wildcard(alias);
1038 return 1;
1039}
1040ADD_TO_DEVTABLE("ipack", ipack_device_id, do_ipack_entry);
1041
1042/*
1043 * Append a match expression for a single masked hex digit.
1044 * outp points to a pointer to the character at which to append.
1045 * *outp is updated on return to point just after the appended text,
1046 * to facilitate further appending.
1047 */
1048static void append_nibble_mask(char **outp,
1049 unsigned int nibble, unsigned int mask)
1050{
1051 char *p = *outp;
1052 unsigned int i;
1053
1054 switch (mask) {
1055 case 0:
1056 *p++ = '?';
1057 break;
1058
1059 case 0xf:
1060 p += sprintf(p, "%X", nibble);
1061 break;
1062
1063 default:
1064 /*
1065 * Dumbly emit a match pattern for all possible matching
1066 * digits. This could be improved in some cases using ranges,
1067 * but it has the advantage of being trivially correct, and is
1068 * often optimal.
1069 */
1070 *p++ = '[';
1071 for (i = 0; i < 0x10; i++)
1072 if ((i & mask) == nibble)
1073 p += sprintf(p, "%X", i);
1074 *p++ = ']';
1075 }
1076
1077 /* Ensure that the string remains NUL-terminated: */
1078 *p = '\0';
1079
1080 /* Advance the caller's end-of-string pointer: */
1081 *outp = p;
1082}
1083
1084/*
1085 * looks like: "amba:dN"
1086 *
1087 * N is exactly 8 digits, where each is an upper-case hex digit, or
1088 * a ? or [] pattern matching exactly one digit.
1089 */
1090static int do_amba_entry(const char *filename,
1091 void *symval, char *alias)
1092{
1093 unsigned int digit;
1094 char *p = alias;
1095 DEF_FIELD(symval, amba_id, id);
1096 DEF_FIELD(symval, amba_id, mask);
1097
1098 if ((id & mask) != id)
1099 fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: "
1100 "id=0x%08X, mask=0x%08X. Please fix this driver.\n",
1101 filename, id, mask);
1102
1103 p += sprintf(alias, "amba:d");
1104 for (digit = 0; digit < 8; digit++)
1105 append_nibble_mask(&p,
1106 (id >> (4 * (7 - digit))) & 0xf,
1107 (mask >> (4 * (7 - digit))) & 0xf);
1108
1109 return 1;
1110}
1111ADD_TO_DEVTABLE("amba", amba_id, do_amba_entry);
1112
1113/* LOOKS like x86cpu:vendor:VVVV:family:FFFF:model:MMMM:feature:*,FEAT,*
1114 * All fields are numbers. It would be nicer to use strings for vendor
1115 * and feature, but getting those out of the build system here is too
1116 * complicated.
1117 */
1118
1119static int do_x86cpu_entry(const char *filename, void *symval,
1120 char *alias)
1121{
1122 DEF_FIELD(symval, x86_cpu_id, feature);
1123 DEF_FIELD(symval, x86_cpu_id, family);
1124 DEF_FIELD(symval, x86_cpu_id, model);
1125 DEF_FIELD(symval, x86_cpu_id, vendor);
1126
1127 strcpy(alias, "x86cpu:");
1128 ADD(alias, "vendor:", vendor != X86_VENDOR_ANY, vendor);
1129 ADD(alias, ":family:", family != X86_FAMILY_ANY, family);
1130 ADD(alias, ":model:", model != X86_MODEL_ANY, model);
1131 strcat(alias, ":feature:*");
1132 if (feature != X86_FEATURE_ANY)
1133 sprintf(alias + strlen(alias), "%04X*", feature);
1134 return 1;
1135}
1136ADD_TO_DEVTABLE("x86cpu", x86_cpu_id, do_x86cpu_entry);
1137
1138/* Looks like: mei:S */
1139static int do_mei_entry(const char *filename, void *symval,
1140 char *alias)
1141{
1142 DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
1143
1144 sprintf(alias, MEI_CL_MODULE_PREFIX "%s", *name);
1145
1146 return 1;
1147}
1148ADD_TO_DEVTABLE("mei", mei_cl_device_id, do_mei_entry);
1149
1150/* Looks like: rapidio:vNdNavNadN */
1151static int do_rio_entry(const char *filename,
1152 void *symval, char *alias)
1153{
1154 DEF_FIELD(symval, rio_device_id, did);
1155 DEF_FIELD(symval, rio_device_id, vid);
1156 DEF_FIELD(symval, rio_device_id, asm_did);
1157 DEF_FIELD(symval, rio_device_id, asm_vid);
1158
1159 strcpy(alias, "rapidio:");
1160 ADD(alias, "v", vid != RIO_ANY_ID, vid);
1161 ADD(alias, "d", did != RIO_ANY_ID, did);
1162 ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
1163 ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
1164
1165 add_wildcard(alias);
1166 return 1;
1167}
1168ADD_TO_DEVTABLE("rapidio", rio_device_id, do_rio_entry);
1169
1170/* Does namelen bytes of name exactly match the symbol? */
1171static bool sym_is(const char *name, unsigned namelen, const char *symbol)
1172{
1173 if (namelen != strlen(symbol))
1174 return false;
1175
1176 return memcmp(name, symbol, namelen) == 0;
1177}
1178
1179static void do_table(void *symval, unsigned long size,
1180 unsigned long id_size,
1181 const char *device_id,
1182 void *function,
1183 struct module *mod)
1184{
1185 unsigned int i;
1186 char alias[500];
1187 int (*do_entry)(const char *, void *entry, char *alias) = function;
1188
1189 device_id_check(mod->name, device_id, size, id_size, symval);
1190 /* Leave last one: it's the terminator. */
1191 size -= id_size;
1192
1193 for (i = 0; i < size; i += id_size) {
1194 if (do_entry(mod->name, symval+i, alias)) {
1195 buf_printf(&mod->dev_table_buf,
1196 "MODULE_ALIAS(\"%s\");\n", alias);
1197 }
1198 }
1199}
1200
1201/* Create MODULE_ALIAS() statements.
1202 * At this time, we cannot write the actual output C source yet,
1203 * so we write into the mod->dev_table_buf buffer. */
1204void handle_moddevtable(struct module *mod, struct elf_info *info,
1205 Elf_Sym *sym, const char *symname)
1206{
1207 void *symval;
1208 char *zeros = NULL;
1209 const char *name;
1210 unsigned int namelen;
1211
1212 /* We're looking for a section relative symbol */
1213 if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
1214 return;
1215
1216 /* We're looking for an object */
1217 if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
1218 return;
1219
1220 /* All our symbols are of form <prefix>__mod_XXX_device_table. */
1221 name = strstr(symname, "__mod_");
1222 if (!name)
1223 return;
1224 name += strlen("__mod_");
1225 namelen = strlen(name);
1226 if (namelen < strlen("_device_table"))
1227 return;
1228 if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
1229 return;
1230 namelen -= strlen("_device_table");
1231
1232 /* Handle all-NULL symbols allocated into .bss */
1233 if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
1234 zeros = calloc(1, sym->st_size);
1235 symval = zeros;
1236 } else {
1237 symval = (void *)info->hdr
1238 + info->sechdrs[get_secindex(info, sym)].sh_offset
1239 + sym->st_value;
1240 }
1241
1242 /* First handle the "special" cases */
1243 if (sym_is(name, namelen, "usb"))
1244 do_usb_table(symval, sym->st_size, mod);
1245 else if (sym_is(name, namelen, "pnp"))
1246 do_pnp_device_entry(symval, sym->st_size, mod);
1247 else if (sym_is(name, namelen, "pnp_card"))
1248 do_pnp_card_entries(symval, sym->st_size, mod);
1249 else {
1250 struct devtable **p;
1251 INIT_SECTION(__devtable);
1252
1253 for (p = __start___devtable; p < __stop___devtable; p++) {
1254 if (sym_is(name, namelen, (*p)->device_id)) {
1255 do_table(symval, sym->st_size, (*p)->id_size,
1256 (*p)->device_id, (*p)->function, mod);
1257 break;
1258 }
1259 }
1260 }
1261 free(zeros);
1262}
1263
1264/* Now add out buffered information to the generated C source */
1265void add_moddevtable(struct buffer *buf, struct module *mod)
1266{
1267 buf_printf(buf, "\n");
1268 buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
1269 free(mod->dev_table_buf.p);
1270}