Linux Kernel  3.7.1
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file2alias.c
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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 
15 /* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
16  * use either stdint.h or inttypes.h for the rest. */
17 #if KERNEL_ELFCLASS == ELFCLASS32
18 typedef Elf32_Addr kernel_ulong_t;
19 #define BITS_PER_LONG 32
20 #else
21 typedef Elf64_Addr kernel_ulong_t;
22 #define BITS_PER_LONG 64
23 #endif
24 #ifdef __sun__
25 #include <inttypes.h>
26 #else
27 #include <stdint.h>
28 #endif
29 
30 #include <ctype.h>
31 #include <stdbool.h>
32 
33 typedef uint32_t __u32;
34 typedef uint16_t __u16;
35 typedef unsigned char __u8;
36 
37 /* Big exception to the "don't include kernel headers into userspace, which
38  * even potentially has different endianness and word sizes, since
39  * we handle those differences explicitly below */
40 #include "../../include/linux/mod_devicetable.h"
41 
42 /* This array collects all instances that use the generic do_table */
43 struct devtable {
44  const char *device_id; /* name of table, __mod_<name>_device_table. */
45  unsigned long id_size;
46  void *function;
47 };
48 
49 #define ___cat(a,b) a ## b
50 #define __cat(a,b) ___cat(a,b)
51 
52 /* we need some special handling for this host tool running eventually on
53  * Darwin. The Mach-O section handling is a bit different than ELF section
54  * handling. The differnces in detail are:
55  * a) we have segments which have sections
56  * b) we need a API call to get the respective section symbols */
57 #if defined(__MACH__)
58 #include <mach-o/getsect.h>
59 
60 #define INIT_SECTION(name) do { \
61  unsigned long name ## _len; \
62  char *__cat(pstart_,name) = getsectdata("__TEXT", \
63  #name, &__cat(name,_len)); \
64  char *__cat(pstop_,name) = __cat(pstart_,name) + \
65  __cat(name, _len); \
66  __cat(__start_,name) = (void *)__cat(pstart_,name); \
67  __cat(__stop_,name) = (void *)__cat(pstop_,name); \
68  } while (0)
69 #define SECTION(name) __attribute__((section("__TEXT, " #name)))
70 
71 struct devtable **__start___devtable, **__stop___devtable;
72 #else
73 #define INIT_SECTION(name) /* no-op for ELF */
74 #define SECTION(name) __attribute__((section(#name)))
75 
76 /* We construct a table of pointers in an ELF section (pointers generally
77  * go unpadded by gcc). ld creates boundary syms for us. */
78 extern struct devtable *__start___devtable[], *__stop___devtable[];
79 #endif /* __MACH__ */
80 
81 #if __GNUC__ == 3 && __GNUC_MINOR__ < 3
82 # define __used __attribute__((__unused__))
83 #else
84 # define __used __attribute__((__used__))
85 #endif
86 
87 /* Add a table entry. We test function type matches while we're here. */
88 #define ADD_TO_DEVTABLE(device_id, type, function) \
89  static struct devtable __cat(devtable,__LINE__) = { \
90  device_id + 0*sizeof((function)((const char *)NULL, \
91  (type *)NULL, \
92  (char *)NULL)), \
93  sizeof(type), (function) }; \
94  static struct devtable *SECTION(__devtable) __used \
95  __cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__)
96 
97 #define ADD(str, sep, cond, field) \
98 do { \
99  strcat(str, sep); \
100  if (cond) \
101  sprintf(str + strlen(str), \
102  sizeof(field) == 1 ? "%02X" : \
103  sizeof(field) == 2 ? "%04X" : \
104  sizeof(field) == 4 ? "%08X" : "", \
105  field); \
106  else \
107  sprintf(str + strlen(str), "*"); \
108 } while(0)
109 
110 /* Always end in a wildcard, for future extension */
111 static inline void add_wildcard(char *str)
112 {
113  int len = strlen(str);
114 
115  if (str[len - 1] != '*')
116  strcat(str + len, "*");
117 }
118 
119 unsigned int cross_build = 0;
127 static void device_id_check(const char *modname, const char *device_id,
128  unsigned long size, unsigned long id_size,
129  void *symval)
130 {
131  int i;
132 
133  if (size % id_size || size < id_size) {
134  if (cross_build != 0)
135  return;
136  fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
137  "of the size of section __mod_%s_device_table=%lu.\n"
138  "Fix definition of struct %s_device_id "
139  "in mod_devicetable.h\n",
140  modname, device_id, id_size, device_id, size, device_id);
141  }
142  /* Verify last one is a terminator */
143  for (i = 0; i < id_size; i++ ) {
144  if (*(uint8_t*)(symval+size-id_size+i)) {
145  fprintf(stderr,"%s: struct %s_device_id is %lu bytes. "
146  "The last of %lu is:\n",
147  modname, device_id, id_size, size / id_size);
148  for (i = 0; i < id_size; i++ )
149  fprintf(stderr,"0x%02x ",
150  *(uint8_t*)(symval+size-id_size+i) );
151  fprintf(stderr,"\n");
152  fatal("%s: struct %s_device_id is not terminated "
153  "with a NULL entry!\n", modname, device_id);
154  }
155  }
156 }
157 
158 /* USB is special because the bcdDevice can be matched against a numeric range */
159 /* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */
160 static void do_usb_entry(struct usb_device_id *id,
161  unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
162  unsigned char range_lo, unsigned char range_hi,
163  unsigned char max, struct module *mod)
164 {
165  char alias[500];
166  strcpy(alias, "usb:");
167  ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR,
168  id->idVendor);
169  ADD(alias, "p", id->match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
170  id->idProduct);
171 
172  strcat(alias, "d");
173  if (bcdDevice_initial_digits)
174  sprintf(alias + strlen(alias), "%0*X",
175  bcdDevice_initial_digits, bcdDevice_initial);
176  if (range_lo == range_hi)
177  sprintf(alias + strlen(alias), "%X", range_lo);
178  else if (range_lo > 0 || range_hi < max) {
179  if (range_lo > 0x9 || range_hi < 0xA)
180  sprintf(alias + strlen(alias),
181  "[%X-%X]",
182  range_lo,
183  range_hi);
184  else {
185  sprintf(alias + strlen(alias),
186  range_lo < 0x9 ? "[%X-9" : "[%X",
187  range_lo);
188  sprintf(alias + strlen(alias),
189  range_hi > 0xA ? "a-%X]" : "%X]",
190  range_lo);
191  }
192  }
193  if (bcdDevice_initial_digits < (sizeof(id->bcdDevice_lo) * 2 - 1))
194  strcat(alias, "*");
195 
196  ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
197  id->bDeviceClass);
198  ADD(alias, "dsc",
199  id->match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
200  id->bDeviceSubClass);
201  ADD(alias, "dp",
202  id->match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
203  id->bDeviceProtocol);
204  ADD(alias, "ic",
205  id->match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
206  id->bInterfaceClass);
207  ADD(alias, "isc",
208  id->match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
209  id->bInterfaceSubClass);
210  ADD(alias, "ip",
211  id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
212  id->bInterfaceProtocol);
213  ADD(alias, "in",
214  id->match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
215  id->bInterfaceNumber);
216 
217  add_wildcard(alias);
218  buf_printf(&mod->dev_table_buf,
219  "MODULE_ALIAS(\"%s\");\n", alias);
220 }
221 
222 /* Handles increment/decrement of BCD formatted integers */
223 /* Returns the previous value, so it works like i++ or i-- */
224 static unsigned int incbcd(unsigned int *bcd,
225  int inc,
226  unsigned char max,
227  size_t chars)
228 {
229  unsigned int init = *bcd, i, j;
230  unsigned long long c, dec = 0;
231 
232  /* If bcd is not in BCD format, just increment */
233  if (max > 0x9) {
234  *bcd += inc;
235  return init;
236  }
237 
238  /* Convert BCD to Decimal */
239  for (i=0 ; i < chars ; i++) {
240  c = (*bcd >> (i << 2)) & 0xf;
241  c = c > 9 ? 9 : c; /* force to bcd just in case */
242  for (j=0 ; j < i ; j++)
243  c = c * 10;
244  dec += c;
245  }
246 
247  /* Do our increment/decrement */
248  dec += inc;
249  *bcd = 0;
250 
251  /* Convert back to BCD */
252  for (i=0 ; i < chars ; i++) {
253  for (c=1,j=0 ; j < i ; j++)
254  c = c * 10;
255  c = (dec / c) % 10;
256  *bcd += c << (i << 2);
257  }
258  return init;
259 }
260 
261 static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod)
262 {
263  unsigned int devlo, devhi;
264  unsigned char chi, clo, max;
265  int ndigits;
266 
267  id->match_flags = TO_NATIVE(id->match_flags);
268  id->idVendor = TO_NATIVE(id->idVendor);
269  id->idProduct = TO_NATIVE(id->idProduct);
270 
271  devlo = id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
272  TO_NATIVE(id->bcdDevice_lo) : 0x0U;
273  devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
274  TO_NATIVE(id->bcdDevice_hi) : ~0x0U;
275 
276  /* Figure out if this entry is in bcd or hex format */
277  max = 0x9; /* Default to decimal format */
278  for (ndigits = 0 ; ndigits < sizeof(id->bcdDevice_lo) * 2 ; ndigits++) {
279  clo = (devlo >> (ndigits << 2)) & 0xf;
280  chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
281  if (clo > max || chi > max) {
282  max = 0xf;
283  break;
284  }
285  }
286 
287  /*
288  * Some modules (visor) have empty slots as placeholder for
289  * run-time specification that results in catch-all alias
290  */
291  if (!(id->idVendor | id->idProduct | id->bDeviceClass | id->bInterfaceClass))
292  return;
293 
294  /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
295  for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
296  clo = devlo & 0xf;
297  chi = devhi & 0xf;
298  if (chi > max) /* If we are in bcd mode, truncate if necessary */
299  chi = max;
300  devlo >>= 4;
301  devhi >>= 4;
302 
303  if (devlo == devhi || !ndigits) {
304  do_usb_entry(id, devlo, ndigits, clo, chi, max, mod);
305  break;
306  }
307 
308  if (clo > 0x0)
309  do_usb_entry(id,
310  incbcd(&devlo, 1, max,
311  sizeof(id->bcdDevice_lo) * 2),
312  ndigits, clo, max, max, mod);
313 
314  if (chi < max)
315  do_usb_entry(id,
316  incbcd(&devhi, -1, max,
317  sizeof(id->bcdDevice_lo) * 2),
318  ndigits, 0x0, chi, max, mod);
319  }
320 }
321 
322 static void do_usb_table(void *symval, unsigned long size,
323  struct module *mod)
324 {
325  unsigned int i;
326  const unsigned long id_size = sizeof(struct usb_device_id);
327 
328  device_id_check(mod->name, "usb", size, id_size, symval);
329 
330  /* Leave last one: it's the terminator. */
331  size -= id_size;
332 
333  for (i = 0; i < size; i += id_size)
334  do_usb_entry_multi(symval + i, mod);
335 }
336 
337 /* Looks like: hid:bNvNpN */
338 static int do_hid_entry(const char *filename,
339  struct hid_device_id *id, char *alias)
340 {
341  id->bus = TO_NATIVE(id->bus);
342  id->group = TO_NATIVE(id->group);
343  id->vendor = TO_NATIVE(id->vendor);
344  id->product = TO_NATIVE(id->product);
345 
346  sprintf(alias, "hid:");
347  ADD(alias, "b", id->bus != HID_BUS_ANY, id->bus);
348  ADD(alias, "g", id->group != HID_GROUP_ANY, id->group);
349  ADD(alias, "v", id->vendor != HID_ANY_ID, id->vendor);
350  ADD(alias, "p", id->product != HID_ANY_ID, id->product);
351 
352  return 1;
353 }
354 ADD_TO_DEVTABLE("hid", struct hid_device_id, do_hid_entry);
355 
356 /* Looks like: ieee1394:venNmoNspNverN */
357 static int do_ieee1394_entry(const char *filename,
358  struct ieee1394_device_id *id, char *alias)
359 {
360  id->match_flags = TO_NATIVE(id->match_flags);
361  id->vendor_id = TO_NATIVE(id->vendor_id);
362  id->model_id = TO_NATIVE(id->model_id);
363  id->specifier_id = TO_NATIVE(id->specifier_id);
364  id->version = TO_NATIVE(id->version);
365 
366  strcpy(alias, "ieee1394:");
367  ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID,
368  id->vendor_id);
369  ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID,
370  id->model_id);
371  ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID,
372  id->specifier_id);
373  ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION,
374  id->version);
375 
376  add_wildcard(alias);
377  return 1;
378 }
379 ADD_TO_DEVTABLE("ieee1394", struct ieee1394_device_id, do_ieee1394_entry);
380 
381 /* Looks like: pci:vNdNsvNsdNbcNscNiN. */
382 static int do_pci_entry(const char *filename,
383  struct pci_device_id *id, char *alias)
384 {
385  /* Class field can be divided into these three. */
386  unsigned char baseclass, subclass, interface,
387  baseclass_mask, subclass_mask, interface_mask;
388 
389  id->vendor = TO_NATIVE(id->vendor);
390  id->device = TO_NATIVE(id->device);
391  id->subvendor = TO_NATIVE(id->subvendor);
392  id->subdevice = TO_NATIVE(id->subdevice);
393  id->class = TO_NATIVE(id->class);
394  id->class_mask = TO_NATIVE(id->class_mask);
395 
396  strcpy(alias, "pci:");
397  ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor);
398  ADD(alias, "d", id->device != PCI_ANY_ID, id->device);
399  ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor);
400  ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice);
401 
402  baseclass = (id->class) >> 16;
403  baseclass_mask = (id->class_mask) >> 16;
404  subclass = (id->class) >> 8;
405  subclass_mask = (id->class_mask) >> 8;
406  interface = id->class;
407  interface_mask = id->class_mask;
408 
409  if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
410  || (subclass_mask != 0 && subclass_mask != 0xFF)
411  || (interface_mask != 0 && interface_mask != 0xFF)) {
412  warn("Can't handle masks in %s:%04X\n",
413  filename, id->class_mask);
414  return 0;
415  }
416 
417  ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
418  ADD(alias, "sc", subclass_mask == 0xFF, subclass);
419  ADD(alias, "i", interface_mask == 0xFF, interface);
420  add_wildcard(alias);
421  return 1;
422 }
423 ADD_TO_DEVTABLE("pci", struct pci_device_id, do_pci_entry);
424 
425 /* looks like: "ccw:tNmNdtNdmN" */
426 static int do_ccw_entry(const char *filename,
427  struct ccw_device_id *id, char *alias)
428 {
429  id->match_flags = TO_NATIVE(id->match_flags);
430  id->cu_type = TO_NATIVE(id->cu_type);
431  id->cu_model = TO_NATIVE(id->cu_model);
432  id->dev_type = TO_NATIVE(id->dev_type);
433  id->dev_model = TO_NATIVE(id->dev_model);
434 
435  strcpy(alias, "ccw:");
436  ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
437  id->cu_type);
438  ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
439  id->cu_model);
440  ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
441  id->dev_type);
442  ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
443  id->dev_model);
444  add_wildcard(alias);
445  return 1;
446 }
447 ADD_TO_DEVTABLE("ccw", struct ccw_device_id, do_ccw_entry);
448 
449 /* looks like: "ap:tN" */
450 static int do_ap_entry(const char *filename,
451  struct ap_device_id *id, char *alias)
452 {
453  sprintf(alias, "ap:t%02X*", id->dev_type);
454  return 1;
455 }
456 ADD_TO_DEVTABLE("ap", struct ap_device_id, do_ap_entry);
457 
458 /* looks like: "css:tN" */
459 static int do_css_entry(const char *filename,
460  struct css_device_id *id, char *alias)
461 {
462  sprintf(alias, "css:t%01X", id->type);
463  return 1;
464 }
465 ADD_TO_DEVTABLE("css", struct css_device_id, do_css_entry);
466 
467 /* Looks like: "serio:tyNprNidNexN" */
468 static int do_serio_entry(const char *filename,
469  struct serio_device_id *id, char *alias)
470 {
471  id->type = TO_NATIVE(id->type);
472  id->proto = TO_NATIVE(id->proto);
473  id->id = TO_NATIVE(id->id);
474  id->extra = TO_NATIVE(id->extra);
475 
476  strcpy(alias, "serio:");
477  ADD(alias, "ty", id->type != SERIO_ANY, id->type);
478  ADD(alias, "pr", id->proto != SERIO_ANY, id->proto);
479  ADD(alias, "id", id->id != SERIO_ANY, id->id);
480  ADD(alias, "ex", id->extra != SERIO_ANY, id->extra);
481 
482  add_wildcard(alias);
483  return 1;
484 }
485 ADD_TO_DEVTABLE("serio", struct serio_device_id, do_serio_entry);
486 
487 /* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
488 static int do_acpi_entry(const char *filename,
489  struct acpi_device_id *id, char *alias)
490 {
491  sprintf(alias, "acpi*:%s:*", id->id);
492  return 1;
493 }
494 ADD_TO_DEVTABLE("acpi", struct acpi_device_id, do_acpi_entry);
495 
496 /* looks like: "pnp:dD" */
497 static void do_pnp_device_entry(void *symval, unsigned long size,
498  struct module *mod)
499 {
500  const unsigned long id_size = sizeof(struct pnp_device_id);
501  const unsigned int count = (size / id_size)-1;
502  const struct pnp_device_id *devs = symval;
503  unsigned int i;
504 
505  device_id_check(mod->name, "pnp", size, id_size, symval);
506 
507  for (i = 0; i < count; i++) {
508  const char *id = (char *)devs[i].id;
509  char acpi_id[sizeof(devs[0].id)];
510  int j;
511 
512  buf_printf(&mod->dev_table_buf,
513  "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
514 
515  /* fix broken pnp bus lowercasing */
516  for (j = 0; j < sizeof(acpi_id); j++)
517  acpi_id[j] = toupper(id[j]);
518  buf_printf(&mod->dev_table_buf,
519  "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
520  }
521 }
522 
523 /* looks like: "pnp:dD" for every device of the card */
524 static void do_pnp_card_entries(void *symval, unsigned long size,
525  struct module *mod)
526 {
527  const unsigned long id_size = sizeof(struct pnp_card_device_id);
528  const unsigned int count = (size / id_size)-1;
529  const struct pnp_card_device_id *cards = symval;
530  unsigned int i;
531 
532  device_id_check(mod->name, "pnp", size, id_size, symval);
533 
534  for (i = 0; i < count; i++) {
535  unsigned int j;
536  const struct pnp_card_device_id *card = &cards[i];
537 
538  for (j = 0; j < PNP_MAX_DEVICES; j++) {
539  const char *id = (char *)card->devs[j].id;
540  int i2, j2;
541  int dup = 0;
542 
543  if (!id[0])
544  break;
545 
546  /* find duplicate, already added value */
547  for (i2 = 0; i2 < i && !dup; i2++) {
548  const struct pnp_card_device_id *card2 = &cards[i2];
549 
550  for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
551  const char *id2 = (char *)card2->devs[j2].id;
552 
553  if (!id2[0])
554  break;
555 
556  if (!strcmp(id, id2)) {
557  dup = 1;
558  break;
559  }
560  }
561  }
562 
563  /* add an individual alias for every device entry */
564  if (!dup) {
565  char acpi_id[sizeof(card->devs[0].id)];
566  int k;
567 
568  buf_printf(&mod->dev_table_buf,
569  "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
570 
571  /* fix broken pnp bus lowercasing */
572  for (k = 0; k < sizeof(acpi_id); k++)
573  acpi_id[k] = toupper(id[k]);
574  buf_printf(&mod->dev_table_buf,
575  "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
576  }
577  }
578  }
579 }
580 
581 /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
582 static int do_pcmcia_entry(const char *filename,
583  struct pcmcia_device_id *id, char *alias)
584 {
585  unsigned int i;
586 
587  id->match_flags = TO_NATIVE(id->match_flags);
588  id->manf_id = TO_NATIVE(id->manf_id);
589  id->card_id = TO_NATIVE(id->card_id);
590  id->func_id = TO_NATIVE(id->func_id);
591  id->function = TO_NATIVE(id->function);
592  id->device_no = TO_NATIVE(id->device_no);
593 
594  for (i=0; i<4; i++) {
595  id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]);
596  }
597 
598  strcpy(alias, "pcmcia:");
599  ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
600  id->manf_id);
601  ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
602  id->card_id);
603  ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
604  id->func_id);
605  ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
606  id->function);
607  ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
608  id->device_no);
609  ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]);
610  ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]);
611  ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]);
612  ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]);
613 
614  add_wildcard(alias);
615  return 1;
616 }
617 ADD_TO_DEVTABLE("pcmcia", struct pcmcia_device_id, do_pcmcia_entry);
618 
619 static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
620 {
621  int len;
622  char *tmp;
623  len = sprintf (alias, "of:N%sT%s",
624  of->name[0] ? of->name : "*",
625  of->type[0] ? of->type : "*");
626 
627  if (of->compatible[0])
628  sprintf (&alias[len], "%sC%s",
629  of->type[0] ? "*" : "",
630  of->compatible);
631 
632  /* Replace all whitespace with underscores */
633  for (tmp = alias; tmp && *tmp; tmp++)
634  if (isspace (*tmp))
635  *tmp = '_';
636 
637  add_wildcard(alias);
638  return 1;
639 }
640 ADD_TO_DEVTABLE("of", struct of_device_id, do_of_entry);
641 
642 static int do_vio_entry(const char *filename, struct vio_device_id *vio,
643  char *alias)
644 {
645  char *tmp;
646 
647  sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*",
648  vio->compat[0] ? vio->compat : "*");
649 
650  /* Replace all whitespace with underscores */
651  for (tmp = alias; tmp && *tmp; tmp++)
652  if (isspace (*tmp))
653  *tmp = '_';
654 
655  add_wildcard(alias);
656  return 1;
657 }
658 ADD_TO_DEVTABLE("vio", struct vio_device_id, do_vio_entry);
659 
660 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
661 
662 static void do_input(char *alias,
663  kernel_ulong_t *arr, unsigned int min, unsigned int max)
664 {
665  unsigned int i;
666 
667  for (i = min; i < max; i++)
668  if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
669  sprintf(alias + strlen(alias), "%X,*", i);
670 }
671 
672 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
673 static int do_input_entry(const char *filename, struct input_device_id *id,
674  char *alias)
675 {
676  sprintf(alias, "input:");
677 
678  ADD(alias, "b", id->flags & INPUT_DEVICE_ID_MATCH_BUS, id->bustype);
679  ADD(alias, "v", id->flags & INPUT_DEVICE_ID_MATCH_VENDOR, id->vendor);
680  ADD(alias, "p", id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT, id->product);
681  ADD(alias, "e", id->flags & INPUT_DEVICE_ID_MATCH_VERSION, id->version);
682 
683  sprintf(alias + strlen(alias), "-e*");
684  if (id->flags & INPUT_DEVICE_ID_MATCH_EVBIT)
685  do_input(alias, id->evbit, 0, INPUT_DEVICE_ID_EV_MAX);
686  sprintf(alias + strlen(alias), "k*");
687  if (id->flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
688  do_input(alias, id->keybit,
689  INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
690  INPUT_DEVICE_ID_KEY_MAX);
691  sprintf(alias + strlen(alias), "r*");
692  if (id->flags & INPUT_DEVICE_ID_MATCH_RELBIT)
693  do_input(alias, id->relbit, 0, INPUT_DEVICE_ID_REL_MAX);
694  sprintf(alias + strlen(alias), "a*");
695  if (id->flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
696  do_input(alias, id->absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
697  sprintf(alias + strlen(alias), "m*");
698  if (id->flags & INPUT_DEVICE_ID_MATCH_MSCIT)
699  do_input(alias, id->mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
700  sprintf(alias + strlen(alias), "l*");
701  if (id->flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
702  do_input(alias, id->ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
703  sprintf(alias + strlen(alias), "s*");
704  if (id->flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
705  do_input(alias, id->sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
706  sprintf(alias + strlen(alias), "f*");
707  if (id->flags & INPUT_DEVICE_ID_MATCH_FFBIT)
708  do_input(alias, id->ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
709  sprintf(alias + strlen(alias), "w*");
710  if (id->flags & INPUT_DEVICE_ID_MATCH_SWBIT)
711  do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX);
712  return 1;
713 }
714 ADD_TO_DEVTABLE("input", struct input_device_id, do_input_entry);
715 
716 static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa,
717  char *alias)
718 {
719  if (eisa->sig[0])
720  sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", eisa->sig);
721  else
722  strcat(alias, "*");
723  return 1;
724 }
725 ADD_TO_DEVTABLE("eisa", struct eisa_device_id, do_eisa_entry);
726 
727 /* Looks like: parisc:tNhvNrevNsvN */
728 static int do_parisc_entry(const char *filename, struct parisc_device_id *id,
729  char *alias)
730 {
731  id->hw_type = TO_NATIVE(id->hw_type);
732  id->hversion = TO_NATIVE(id->hversion);
733  id->hversion_rev = TO_NATIVE(id->hversion_rev);
734  id->sversion = TO_NATIVE(id->sversion);
735 
736  strcpy(alias, "parisc:");
737  ADD(alias, "t", id->hw_type != PA_HWTYPE_ANY_ID, id->hw_type);
738  ADD(alias, "hv", id->hversion != PA_HVERSION_ANY_ID, id->hversion);
739  ADD(alias, "rev", id->hversion_rev != PA_HVERSION_REV_ANY_ID, id->hversion_rev);
740  ADD(alias, "sv", id->sversion != PA_SVERSION_ANY_ID, id->sversion);
741 
742  add_wildcard(alias);
743  return 1;
744 }
745 ADD_TO_DEVTABLE("parisc", struct parisc_device_id, do_parisc_entry);
746 
747 /* Looks like: sdio:cNvNdN. */
748 static int do_sdio_entry(const char *filename,
749  struct sdio_device_id *id, char *alias)
750 {
751  id->class = TO_NATIVE(id->class);
752  id->vendor = TO_NATIVE(id->vendor);
753  id->device = TO_NATIVE(id->device);
754 
755  strcpy(alias, "sdio:");
756  ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class);
757  ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor);
758  ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device);
759  add_wildcard(alias);
760  return 1;
761 }
762 ADD_TO_DEVTABLE("sdio", struct sdio_device_id, do_sdio_entry);
763 
764 /* Looks like: ssb:vNidNrevN. */
765 static int do_ssb_entry(const char *filename,
766  struct ssb_device_id *id, char *alias)
767 {
768  id->vendor = TO_NATIVE(id->vendor);
769  id->coreid = TO_NATIVE(id->coreid);
770  id->revision = TO_NATIVE(id->revision);
771 
772  strcpy(alias, "ssb:");
773  ADD(alias, "v", id->vendor != SSB_ANY_VENDOR, id->vendor);
774  ADD(alias, "id", id->coreid != SSB_ANY_ID, id->coreid);
775  ADD(alias, "rev", id->revision != SSB_ANY_REV, id->revision);
776  add_wildcard(alias);
777  return 1;
778 }
779 ADD_TO_DEVTABLE("ssb", struct ssb_device_id, do_ssb_entry);
780 
781 /* Looks like: bcma:mNidNrevNclN. */
782 static int do_bcma_entry(const char *filename,
783  struct bcma_device_id *id, char *alias)
784 {
785  id->manuf = TO_NATIVE(id->manuf);
786  id->id = TO_NATIVE(id->id);
787  id->rev = TO_NATIVE(id->rev);
788  id->class = TO_NATIVE(id->class);
789 
790  strcpy(alias, "bcma:");
791  ADD(alias, "m", id->manuf != BCMA_ANY_MANUF, id->manuf);
792  ADD(alias, "id", id->id != BCMA_ANY_ID, id->id);
793  ADD(alias, "rev", id->rev != BCMA_ANY_REV, id->rev);
794  ADD(alias, "cl", id->class != BCMA_ANY_CLASS, id->class);
795  add_wildcard(alias);
796  return 1;
797 }
798 ADD_TO_DEVTABLE("bcma", struct bcma_device_id, do_bcma_entry);
799 
800 /* Looks like: virtio:dNvN */
801 static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
802  char *alias)
803 {
804  id->device = TO_NATIVE(id->device);
805  id->vendor = TO_NATIVE(id->vendor);
806 
807  strcpy(alias, "virtio:");
808  ADD(alias, "d", id->device != VIRTIO_DEV_ANY_ID, id->device);
809  ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor);
810 
811  add_wildcard(alias);
812  return 1;
813 }
814 ADD_TO_DEVTABLE("virtio", struct virtio_device_id, do_virtio_entry);
815 
816 /*
817  * Looks like: vmbus:guid
818  * Each byte of the guid will be represented by two hex characters
819  * in the name.
820  */
821 
822 static int do_vmbus_entry(const char *filename, struct hv_vmbus_device_id *id,
823  char *alias)
824 {
825  int i;
826  char guid_name[((sizeof(id->guid) + 1)) * 2];
827 
828  for (i = 0; i < (sizeof(id->guid) * 2); i += 2)
829  sprintf(&guid_name[i], "%02x", id->guid[i/2]);
830 
831  strcpy(alias, "vmbus:");
832  strcat(alias, guid_name);
833 
834  return 1;
835 }
836 ADD_TO_DEVTABLE("vmbus", struct hv_vmbus_device_id, do_vmbus_entry);
837 
838 /* Looks like: i2c:S */
839 static int do_i2c_entry(const char *filename, struct i2c_device_id *id,
840  char *alias)
841 {
842  sprintf(alias, I2C_MODULE_PREFIX "%s", id->name);
843 
844  return 1;
845 }
846 ADD_TO_DEVTABLE("i2c", struct i2c_device_id, do_i2c_entry);
847 
848 /* Looks like: spi:S */
849 static int do_spi_entry(const char *filename, struct spi_device_id *id,
850  char *alias)
851 {
852  sprintf(alias, SPI_MODULE_PREFIX "%s", id->name);
853 
854  return 1;
855 }
856 ADD_TO_DEVTABLE("spi", struct spi_device_id, do_spi_entry);
857 
858 static const struct dmifield {
859  const char *prefix;
860  int field;
861 } dmi_fields[] = {
862  { "bvn", DMI_BIOS_VENDOR },
863  { "bvr", DMI_BIOS_VERSION },
864  { "bd", DMI_BIOS_DATE },
865  { "svn", DMI_SYS_VENDOR },
866  { "pn", DMI_PRODUCT_NAME },
867  { "pvr", DMI_PRODUCT_VERSION },
868  { "rvn", DMI_BOARD_VENDOR },
869  { "rn", DMI_BOARD_NAME },
870  { "rvr", DMI_BOARD_VERSION },
871  { "cvn", DMI_CHASSIS_VENDOR },
872  { "ct", DMI_CHASSIS_TYPE },
873  { "cvr", DMI_CHASSIS_VERSION },
874  { NULL, DMI_NONE }
875 };
876 
877 static void dmi_ascii_filter(char *d, const char *s)
878 {
879  /* Filter out characters we don't want to see in the modalias string */
880  for (; *s; s++)
881  if (*s > ' ' && *s < 127 && *s != ':')
882  *(d++) = *s;
883 
884  *d = 0;
885 }
886 
887 
888 static int do_dmi_entry(const char *filename, struct dmi_system_id *id,
889  char *alias)
890 {
891  int i, j;
892 
893  sprintf(alias, "dmi*");
894 
895  for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
896  for (j = 0; j < 4; j++) {
897  if (id->matches[j].slot &&
898  id->matches[j].slot == dmi_fields[i].field) {
899  sprintf(alias + strlen(alias), ":%s*",
900  dmi_fields[i].prefix);
901  dmi_ascii_filter(alias + strlen(alias),
902  id->matches[j].substr);
903  strcat(alias, "*");
904  }
905  }
906  }
907 
908  strcat(alias, ":");
909  return 1;
910 }
911 ADD_TO_DEVTABLE("dmi", struct dmi_system_id, do_dmi_entry);
912 
913 static int do_platform_entry(const char *filename,
914  struct platform_device_id *id, char *alias)
915 {
916  sprintf(alias, PLATFORM_MODULE_PREFIX "%s", id->name);
917  return 1;
918 }
919 ADD_TO_DEVTABLE("platform", struct platform_device_id, do_platform_entry);
920 
921 static int do_mdio_entry(const char *filename,
922  struct mdio_device_id *id, char *alias)
923 {
924  int i;
925 
926  alias += sprintf(alias, MDIO_MODULE_PREFIX);
927 
928  for (i = 0; i < 32; i++) {
929  if (!((id->phy_id_mask >> (31-i)) & 1))
930  *(alias++) = '?';
931  else if ((id->phy_id >> (31-i)) & 1)
932  *(alias++) = '1';
933  else
934  *(alias++) = '0';
935  }
936 
937  /* Terminate the string */
938  *alias = 0;
939 
940  return 1;
941 }
942 ADD_TO_DEVTABLE("mdio", struct mdio_device_id, do_mdio_entry);
943 
944 /* Looks like: zorro:iN. */
945 static int do_zorro_entry(const char *filename, struct zorro_device_id *id,
946  char *alias)
947 {
948  id->id = TO_NATIVE(id->id);
949  strcpy(alias, "zorro:");
950  ADD(alias, "i", id->id != ZORRO_WILDCARD, id->id);
951  return 1;
952 }
953 ADD_TO_DEVTABLE("zorro", struct zorro_device_id, do_zorro_entry);
954 
955 /* looks like: "pnp:dD" */
956 static int do_isapnp_entry(const char *filename,
957  struct isapnp_device_id *id, char *alias)
958 {
959  sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
960  'A' + ((id->vendor >> 2) & 0x3f) - 1,
961  'A' + (((id->vendor & 3) << 3) | ((id->vendor >> 13) & 7)) - 1,
962  'A' + ((id->vendor >> 8) & 0x1f) - 1,
963  (id->function >> 4) & 0x0f, id->function & 0x0f,
964  (id->function >> 12) & 0x0f, (id->function >> 8) & 0x0f);
965  return 1;
966 }
967 ADD_TO_DEVTABLE("isapnp", struct isapnp_device_id, do_isapnp_entry);
968 
969 /* Looks like: "ipack:fNvNdN". */
970 static int do_ipack_entry(const char *filename,
971  struct ipack_device_id *id, char *alias)
972 {
973  id->vendor = TO_NATIVE(id->vendor);
974  id->device = TO_NATIVE(id->device);
975  strcpy(alias, "ipack:");
976  ADD(alias, "f", id->format != IPACK_ANY_FORMAT, id->format);
977  ADD(alias, "v", id->vendor != IPACK_ANY_ID, id->vendor);
978  ADD(alias, "d", id->device != IPACK_ANY_ID, id->device);
979  add_wildcard(alias);
980  return 1;
981 }
982 ADD_TO_DEVTABLE("ipack", struct ipack_device_id, do_ipack_entry);
983 
984 /*
985  * Append a match expression for a single masked hex digit.
986  * outp points to a pointer to the character at which to append.
987  * *outp is updated on return to point just after the appended text,
988  * to facilitate further appending.
989  */
990 static void append_nibble_mask(char **outp,
991  unsigned int nibble, unsigned int mask)
992 {
993  char *p = *outp;
994  unsigned int i;
995 
996  switch (mask) {
997  case 0:
998  *p++ = '?';
999  break;
1000 
1001  case 0xf:
1002  p += sprintf(p, "%X", nibble);
1003  break;
1004 
1005  default:
1006  /*
1007  * Dumbly emit a match pattern for all possible matching
1008  * digits. This could be improved in some cases using ranges,
1009  * but it has the advantage of being trivially correct, and is
1010  * often optimal.
1011  */
1012  *p++ = '[';
1013  for (i = 0; i < 0x10; i++)
1014  if ((i & mask) == nibble)
1015  p += sprintf(p, "%X", i);
1016  *p++ = ']';
1017  }
1018 
1019  /* Ensure that the string remains NUL-terminated: */
1020  *p = '\0';
1021 
1022  /* Advance the caller's end-of-string pointer: */
1023  *outp = p;
1024 }
1025 
1026 /*
1027  * looks like: "amba:dN"
1028  *
1029  * N is exactly 8 digits, where each is an upper-case hex digit, or
1030  * a ? or [] pattern matching exactly one digit.
1031  */
1032 static int do_amba_entry(const char *filename,
1033  struct amba_id *id, char *alias)
1034 {
1035  unsigned int digit;
1036  char *p = alias;
1037 
1038  if ((id->id & id->mask) != id->id)
1039  fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: "
1040  "id=0x%08X, mask=0x%08X. Please fix this driver.\n",
1041  filename, id->id, id->mask);
1042 
1043  p += sprintf(alias, "amba:d");
1044  for (digit = 0; digit < 8; digit++)
1045  append_nibble_mask(&p,
1046  (id->id >> (4 * (7 - digit))) & 0xf,
1047  (id->mask >> (4 * (7 - digit))) & 0xf);
1048 
1049  return 1;
1050 }
1051 ADD_TO_DEVTABLE("amba", struct amba_id, do_amba_entry);
1052 
1053 /* LOOKS like x86cpu:vendor:VVVV:family:FFFF:model:MMMM:feature:*,FEAT,*
1054  * All fields are numbers. It would be nicer to use strings for vendor
1055  * and feature, but getting those out of the build system here is too
1056  * complicated.
1057  */
1058 
1059 static int do_x86cpu_entry(const char *filename, struct x86_cpu_id *id,
1060  char *alias)
1061 {
1062  id->feature = TO_NATIVE(id->feature);
1063  id->family = TO_NATIVE(id->family);
1064  id->model = TO_NATIVE(id->model);
1065  id->vendor = TO_NATIVE(id->vendor);
1066 
1067  strcpy(alias, "x86cpu:");
1068  ADD(alias, "vendor:", id->vendor != X86_VENDOR_ANY, id->vendor);
1069  ADD(alias, ":family:", id->family != X86_FAMILY_ANY, id->family);
1070  ADD(alias, ":model:", id->model != X86_MODEL_ANY, id->model);
1071  strcat(alias, ":feature:*");
1072  if (id->feature != X86_FEATURE_ANY)
1073  sprintf(alias + strlen(alias), "%04X*", id->feature);
1074  return 1;
1075 }
1076 ADD_TO_DEVTABLE("x86cpu", struct x86_cpu_id, do_x86cpu_entry);
1077 
1078 /* Does namelen bytes of name exactly match the symbol? */
1079 static bool sym_is(const char *name, unsigned namelen, const char *symbol)
1080 {
1081  if (namelen != strlen(symbol))
1082  return false;
1083 
1084  return memcmp(name, symbol, namelen) == 0;
1085 }
1086 
1087 static void do_table(void *symval, unsigned long size,
1088  unsigned long id_size,
1089  const char *device_id,
1090  void *function,
1091  struct module *mod)
1092 {
1093  unsigned int i;
1094  char alias[500];
1095  int (*do_entry)(const char *, void *entry, char *alias) = function;
1096 
1097  device_id_check(mod->name, device_id, size, id_size, symval);
1098  /* Leave last one: it's the terminator. */
1099  size -= id_size;
1100 
1101  for (i = 0; i < size; i += id_size) {
1102  if (do_entry(mod->name, symval+i, alias)) {
1103  buf_printf(&mod->dev_table_buf,
1104  "MODULE_ALIAS(\"%s\");\n", alias);
1105  }
1106  }
1107 }
1108 
1109 /* Create MODULE_ALIAS() statements.
1110  * At this time, we cannot write the actual output C source yet,
1111  * so we write into the mod->dev_table_buf buffer. */
1112 void handle_moddevtable(struct module *mod, struct elf_info *info,
1113  Elf_Sym *sym, const char *symname)
1114 {
1115  void *symval;
1116  char *zeros = NULL;
1117  const char *name;
1118  unsigned int namelen;
1119 
1120  /* We're looking for a section relative symbol */
1121  if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
1122  return;
1123 
1124  /* We're looking for an object */
1125  if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
1126  return;
1127 
1128  /* All our symbols are of form <prefix>__mod_XXX_device_table. */
1129  name = strstr(symname, "__mod_");
1130  if (!name)
1131  return;
1132  name += strlen("__mod_");
1133  namelen = strlen(name);
1134  if (namelen < strlen("_device_table"))
1135  return;
1136  if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
1137  return;
1138  namelen -= strlen("_device_table");
1139 
1140  /* Handle all-NULL symbols allocated into .bss */
1141  if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
1142  zeros = calloc(1, sym->st_size);
1143  symval = zeros;
1144  } else {
1145  symval = (void *)info->hdr
1146  + info->sechdrs[get_secindex(info, sym)].sh_offset
1147  + sym->st_value;
1148  }
1149 
1150  /* First handle the "special" cases */
1151  if (sym_is(name, namelen, "usb"))
1152  do_usb_table(symval, sym->st_size, mod);
1153  else if (sym_is(name, namelen, "pnp"))
1154  do_pnp_device_entry(symval, sym->st_size, mod);
1155  else if (sym_is(name, namelen, "pnp_card"))
1156  do_pnp_card_entries(symval, sym->st_size, mod);
1157  else {
1158  struct devtable **p;
1159  INIT_SECTION(__devtable);
1160 
1161  for (p = __start___devtable; p < __stop___devtable; p++) {
1162  if (sym_is(name, namelen, (*p)->device_id)) {
1163  do_table(symval, sym->st_size, (*p)->id_size,
1164  (*p)->device_id, (*p)->function, mod);
1165  break;
1166  }
1167  }
1168  }
1169  free(zeros);
1170 }
1171 
1172 /* Now add out buffered information to the generated C source */
1173 void add_moddevtable(struct buffer *buf, struct module *mod)
1174 {
1175  buf_printf(buf, "\n");
1176  buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
1177  free(mod->dev_table_buf.p);
1178 }
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