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TOMOYO Linux Cross Reference
Linux/scripts/mod/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 #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
 19 typedef Elf32_Addr      kernel_ulong_t;
 20 #define BITS_PER_LONG 32
 21 #else
 22 typedef 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 
 34 typedef uint32_t        __u32;
 35 typedef uint16_t        __u16;
 36 typedef unsigned char   __u8;
 37 typedef struct {
 38         __u8 b[16];
 39 } guid_t;
 40 
 41 /* backwards compatibility, don't use in new code */
 42 typedef struct {
 43         __u8 b[16];
 44 } uuid_le;
 45 typedef struct {
 46         __u8 b[16];
 47 } uuid_t;
 48 #define UUID_STRING_LEN         36
 49 
 50 /* Big exception to the "don't include kernel headers into userspace, which
 51  * even potentially has different endianness and word sizes, since
 52  * we handle those differences explicitly below */
 53 #include "../../include/linux/mod_devicetable.h"
 54 
 55 /* This array collects all instances that use the generic do_table */
 56 struct devtable {
 57         const char *device_id; /* name of table, __mod_<name>__*_device_table. */
 58         unsigned long id_size;
 59         int (*do_entry)(const char *filename, void *symval, char *alias);
 60 };
 61 
 62 /* Size of alias provided to do_entry functions */
 63 #define ALIAS_SIZE 500
 64 
 65 /* Define a variable f that holds the value of field f of struct devid
 66  * based at address m.
 67  */
 68 #define DEF_FIELD(m, devid, f) \
 69         typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))
 70 
 71 /* Define a variable v that holds the address of field f of struct devid
 72  * based at address m.  Due to the way typeof works, for a field of type
 73  * T[N] the variable has type T(*)[N], _not_ T*.
 74  */
 75 #define DEF_FIELD_ADDR_VAR(m, devid, f, v) \
 76         typeof(((struct devid *)0)->f) *v = ((m) + OFF_##devid##_##f)
 77 
 78 /* Define a variable f that holds the address of field f of struct devid
 79  * based at address m.  Due to the way typeof works, for a field of type
 80  * T[N] the variable has type T(*)[N], _not_ T*.
 81  */
 82 #define DEF_FIELD_ADDR(m, devid, f) \
 83         DEF_FIELD_ADDR_VAR(m, devid, f, f)
 84 
 85 #define ADD(str, sep, cond, field)                              \
 86 do {                                                            \
 87         strcat(str, sep);                                       \
 88         if (cond)                                               \
 89                 sprintf(str + strlen(str),                      \
 90                         sizeof(field) == 1 ? "%02X" :           \
 91                         sizeof(field) == 2 ? "%04X" :           \
 92                         sizeof(field) == 4 ? "%08X" : "",       \
 93                         field);                                 \
 94         else                                                    \
 95                 sprintf(str + strlen(str), "*");                \
 96 } while(0)
 97 
 98 /* End in a wildcard, for future extension */
 99 static inline void add_wildcard(char *str)
100 {
101         int len = strlen(str);
102 
103         if (str[len - 1] != '*')
104                 strcat(str + len, "*");
105 }
106 
107 static inline void add_uuid(char *str, uuid_le uuid)
108 {
109         int len = strlen(str);
110 
111         sprintf(str + len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
112                 uuid.b[3], uuid.b[2], uuid.b[1], uuid.b[0],
113                 uuid.b[5], uuid.b[4], uuid.b[7], uuid.b[6],
114                 uuid.b[8], uuid.b[9], uuid.b[10], uuid.b[11],
115                 uuid.b[12], uuid.b[13], uuid.b[14], uuid.b[15]);
116 }
117 
118 /**
119  * Check that sizeof(device_id type) are consistent with size of section
120  * in .o file. If in-consistent then userspace and kernel does not agree
121  * on actual size which is a bug.
122  * Also verify that the final entry in the table is all zeros.
123  * Ignore both checks if build host differ from target host and size differs.
124  **/
125 static void device_id_check(const char *modname, const char *device_id,
126                             unsigned long size, unsigned long id_size,
127                             void *symval)
128 {
129         int i;
130 
131         if (size % id_size || size < id_size) {
132                 fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
133                       "of the size of "
134                       "section __mod_%s__<identifier>_device_table=%lu.\n"
135                       "Fix definition of struct %s_device_id "
136                       "in mod_devicetable.h\n",
137                       modname, device_id, id_size, device_id, size, device_id);
138         }
139         /* Verify last one is a terminator */
140         for (i = 0; i < id_size; i++ ) {
141                 if (*(uint8_t*)(symval+size-id_size+i)) {
142                         fprintf(stderr,"%s: struct %s_device_id is %lu bytes.  "
143                                 "The last of %lu is:\n",
144                                 modname, device_id, id_size, size / id_size);
145                         for (i = 0; i < id_size; i++ )
146                                 fprintf(stderr,"0x%02x ",
147                                         *(uint8_t*)(symval+size-id_size+i) );
148                         fprintf(stderr,"\n");
149                         fatal("%s: struct %s_device_id is not terminated "
150                                 "with a NULL entry!\n", modname, device_id);
151                 }
152         }
153 }
154 
155 /* USB is special because the bcdDevice can be matched against a numeric range */
156 /* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */
157 static void do_usb_entry(void *symval,
158                          unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
159                          unsigned char range_lo, unsigned char range_hi,
160                          unsigned char max, struct module *mod)
161 {
162         char alias[500];
163         DEF_FIELD(symval, usb_device_id, match_flags);
164         DEF_FIELD(symval, usb_device_id, idVendor);
165         DEF_FIELD(symval, usb_device_id, idProduct);
166         DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
167         DEF_FIELD(symval, usb_device_id, bDeviceClass);
168         DEF_FIELD(symval, usb_device_id, bDeviceSubClass);
169         DEF_FIELD(symval, usb_device_id, bDeviceProtocol);
170         DEF_FIELD(symval, usb_device_id, bInterfaceClass);
171         DEF_FIELD(symval, usb_device_id, bInterfaceSubClass);
172         DEF_FIELD(symval, usb_device_id, bInterfaceProtocol);
173         DEF_FIELD(symval, usb_device_id, bInterfaceNumber);
174 
175         strcpy(alias, "usb:");
176         ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR,
177             idVendor);
178         ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
179             idProduct);
180 
181         strcat(alias, "d");
182         if (bcdDevice_initial_digits)
183                 sprintf(alias + strlen(alias), "%0*X",
184                         bcdDevice_initial_digits, bcdDevice_initial);
185         if (range_lo == range_hi)
186                 sprintf(alias + strlen(alias), "%X", range_lo);
187         else if (range_lo > 0 || range_hi < max) {
188                 if (range_lo > 0x9 || range_hi < 0xA)
189                         sprintf(alias + strlen(alias),
190                                 "[%X-%X]",
191                                 range_lo,
192                                 range_hi);
193                 else {
194                         sprintf(alias + strlen(alias),
195                                 range_lo < 0x9 ? "[%X-9" : "[%X",
196                                 range_lo);
197                         sprintf(alias + strlen(alias),
198                                 range_hi > 0xA ? "A-%X]" : "%X]",
199                                 range_hi);
200                 }
201         }
202         if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1))
203                 strcat(alias, "*");
204 
205         ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
206             bDeviceClass);
207         ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
208             bDeviceSubClass);
209         ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
210             bDeviceProtocol);
211         ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
212             bInterfaceClass);
213         ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
214             bInterfaceSubClass);
215         ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
216             bInterfaceProtocol);
217         ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
218             bInterfaceNumber);
219 
220         add_wildcard(alias);
221         buf_printf(&mod->dev_table_buf,
222                    "MODULE_ALIAS(\"%s\");\n", alias);
223 }
224 
225 /* Handles increment/decrement of BCD formatted integers */
226 /* Returns the previous value, so it works like i++ or i-- */
227 static unsigned int incbcd(unsigned int *bcd,
228                            int inc,
229                            unsigned char max,
230                            size_t chars)
231 {
232         unsigned int init = *bcd, i, j;
233         unsigned long long c, dec = 0;
234 
235         /* If bcd is not in BCD format, just increment */
236         if (max > 0x9) {
237                 *bcd += inc;
238                 return init;
239         }
240 
241         /* Convert BCD to Decimal */
242         for (i=0 ; i < chars ; i++) {
243                 c = (*bcd >> (i << 2)) & 0xf;
244                 c = c > 9 ? 9 : c; /* force to bcd just in case */
245                 for (j=0 ; j < i ; j++)
246                         c = c * 10;
247                 dec += c;
248         }
249 
250         /* Do our increment/decrement */
251         dec += inc;
252         *bcd  = 0;
253 
254         /* Convert back to BCD */
255         for (i=0 ; i < chars ; i++) {
256                 for (c=1,j=0 ; j < i ; j++)
257                         c = c * 10;
258                 c = (dec / c) % 10;
259                 *bcd += c << (i << 2);
260         }
261         return init;
262 }
263 
264 static void do_usb_entry_multi(void *symval, struct module *mod)
265 {
266         unsigned int devlo, devhi;
267         unsigned char chi, clo, max;
268         int ndigits;
269 
270         DEF_FIELD(symval, usb_device_id, match_flags);
271         DEF_FIELD(symval, usb_device_id, idVendor);
272         DEF_FIELD(symval, usb_device_id, idProduct);
273         DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
274         DEF_FIELD(symval, usb_device_id, bcdDevice_hi);
275         DEF_FIELD(symval, usb_device_id, bDeviceClass);
276         DEF_FIELD(symval, usb_device_id, bInterfaceClass);
277 
278         devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
279                 bcdDevice_lo : 0x0U;
280         devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
281                 bcdDevice_hi : ~0x0U;
282 
283         /* Figure out if this entry is in bcd or hex format */
284         max = 0x9; /* Default to decimal format */
285         for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) {
286                 clo = (devlo >> (ndigits << 2)) & 0xf;
287                 chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
288                 if (clo > max || chi > max) {
289                         max = 0xf;
290                         break;
291                 }
292         }
293 
294         /*
295          * Some modules (visor) have empty slots as placeholder for
296          * run-time specification that results in catch-all alias
297          */
298         if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass))
299                 return;
300 
301         /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
302         for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
303                 clo = devlo & 0xf;
304                 chi = devhi & 0xf;
305                 if (chi > max)  /* If we are in bcd mode, truncate if necessary */
306                         chi = max;
307                 devlo >>= 4;
308                 devhi >>= 4;
309 
310                 if (devlo == devhi || !ndigits) {
311                         do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod);
312                         break;
313                 }
314 
315                 if (clo > 0x0)
316                         do_usb_entry(symval,
317                                      incbcd(&devlo, 1, max,
318                                             sizeof(bcdDevice_lo) * 2),
319                                      ndigits, clo, max, max, mod);
320 
321                 if (chi < max)
322                         do_usb_entry(symval,
323                                      incbcd(&devhi, -1, max,
324                                             sizeof(bcdDevice_lo) * 2),
325                                      ndigits, 0x0, chi, max, mod);
326         }
327 }
328 
329 static void do_usb_table(void *symval, unsigned long size,
330                          struct module *mod)
331 {
332         unsigned int i;
333         const unsigned long id_size = SIZE_usb_device_id;
334 
335         device_id_check(mod->name, "usb", size, id_size, symval);
336 
337         /* Leave last one: it's the terminator. */
338         size -= id_size;
339 
340         for (i = 0; i < size; i += id_size)
341                 do_usb_entry_multi(symval + i, mod);
342 }
343 
344 static void do_of_entry_multi(void *symval, struct module *mod)
345 {
346         char alias[500];
347         int len;
348         char *tmp;
349 
350         DEF_FIELD_ADDR(symval, of_device_id, name);
351         DEF_FIELD_ADDR(symval, of_device_id, type);
352         DEF_FIELD_ADDR(symval, of_device_id, compatible);
353 
354         len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*",
355                       (*type)[0] ? *type : "*");
356 
357         if ((*compatible)[0])
358                 sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "",
359                         *compatible);
360 
361         /* Replace all whitespace with underscores */
362         for (tmp = alias; tmp && *tmp; tmp++)
363                 if (isspace(*tmp))
364                         *tmp = '_';
365 
366         buf_printf(&mod->dev_table_buf, "MODULE_ALIAS(\"%s\");\n", alias);
367         strcat(alias, "C");
368         add_wildcard(alias);
369         buf_printf(&mod->dev_table_buf, "MODULE_ALIAS(\"%s\");\n", alias);
370 }
371 
372 static void do_of_table(void *symval, unsigned long size,
373                         struct module *mod)
374 {
375         unsigned int i;
376         const unsigned long id_size = SIZE_of_device_id;
377 
378         device_id_check(mod->name, "of", size, id_size, symval);
379 
380         /* Leave last one: it's the terminator. */
381         size -= id_size;
382 
383         for (i = 0; i < size; i += id_size)
384                 do_of_entry_multi(symval + i, mod);
385 }
386 
387 /* Looks like: hid:bNvNpN */
388 static int do_hid_entry(const char *filename,
389                              void *symval, char *alias)
390 {
391         DEF_FIELD(symval, hid_device_id, bus);
392         DEF_FIELD(symval, hid_device_id, group);
393         DEF_FIELD(symval, hid_device_id, vendor);
394         DEF_FIELD(symval, hid_device_id, product);
395 
396         sprintf(alias, "hid:");
397         ADD(alias, "b", bus != HID_BUS_ANY, bus);
398         ADD(alias, "g", group != HID_GROUP_ANY, group);
399         ADD(alias, "v", vendor != HID_ANY_ID, vendor);
400         ADD(alias, "p", product != HID_ANY_ID, product);
401 
402         return 1;
403 }
404 
405 /* Looks like: ieee1394:venNmoNspNverN */
406 static int do_ieee1394_entry(const char *filename,
407                              void *symval, char *alias)
408 {
409         DEF_FIELD(symval, ieee1394_device_id, match_flags);
410         DEF_FIELD(symval, ieee1394_device_id, vendor_id);
411         DEF_FIELD(symval, ieee1394_device_id, model_id);
412         DEF_FIELD(symval, ieee1394_device_id, specifier_id);
413         DEF_FIELD(symval, ieee1394_device_id, version);
414 
415         strcpy(alias, "ieee1394:");
416         ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID,
417             vendor_id);
418         ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID,
419             model_id);
420         ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID,
421             specifier_id);
422         ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION,
423             version);
424 
425         add_wildcard(alias);
426         return 1;
427 }
428 
429 /* Looks like: pci:vNdNsvNsdNbcNscNiN. */
430 static int do_pci_entry(const char *filename,
431                         void *symval, char *alias)
432 {
433         /* Class field can be divided into these three. */
434         unsigned char baseclass, subclass, interface,
435                 baseclass_mask, subclass_mask, interface_mask;
436 
437         DEF_FIELD(symval, pci_device_id, vendor);
438         DEF_FIELD(symval, pci_device_id, device);
439         DEF_FIELD(symval, pci_device_id, subvendor);
440         DEF_FIELD(symval, pci_device_id, subdevice);
441         DEF_FIELD(symval, pci_device_id, class);
442         DEF_FIELD(symval, pci_device_id, class_mask);
443 
444         strcpy(alias, "pci:");
445         ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
446         ADD(alias, "d", device != PCI_ANY_ID, device);
447         ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
448         ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);
449 
450         baseclass = (class) >> 16;
451         baseclass_mask = (class_mask) >> 16;
452         subclass = (class) >> 8;
453         subclass_mask = (class_mask) >> 8;
454         interface = class;
455         interface_mask = class_mask;
456 
457         if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
458             || (subclass_mask != 0 && subclass_mask != 0xFF)
459             || (interface_mask != 0 && interface_mask != 0xFF)) {
460                 warn("Can't handle masks in %s:%04X\n",
461                      filename, class_mask);
462                 return 0;
463         }
464 
465         ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
466         ADD(alias, "sc", subclass_mask == 0xFF, subclass);
467         ADD(alias, "i", interface_mask == 0xFF, interface);
468         add_wildcard(alias);
469         return 1;
470 }
471 
472 /* looks like: "ccw:tNmNdtNdmN" */
473 static int do_ccw_entry(const char *filename,
474                         void *symval, char *alias)
475 {
476         DEF_FIELD(symval, ccw_device_id, match_flags);
477         DEF_FIELD(symval, ccw_device_id, cu_type);
478         DEF_FIELD(symval, ccw_device_id, cu_model);
479         DEF_FIELD(symval, ccw_device_id, dev_type);
480         DEF_FIELD(symval, ccw_device_id, dev_model);
481 
482         strcpy(alias, "ccw:");
483         ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
484             cu_type);
485         ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
486             cu_model);
487         ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
488             dev_type);
489         ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
490             dev_model);
491         add_wildcard(alias);
492         return 1;
493 }
494 
495 /* looks like: "ap:tN" */
496 static int do_ap_entry(const char *filename,
497                        void *symval, char *alias)
498 {
499         DEF_FIELD(symval, ap_device_id, dev_type);
500 
501         sprintf(alias, "ap:t%02X*", dev_type);
502         return 1;
503 }
504 
505 /* looks like: "css:tN" */
506 static int do_css_entry(const char *filename,
507                         void *symval, char *alias)
508 {
509         DEF_FIELD(symval, css_device_id, type);
510 
511         sprintf(alias, "css:t%01X", type);
512         return 1;
513 }
514 
515 /* Looks like: "serio:tyNprNidNexN" */
516 static int do_serio_entry(const char *filename,
517                           void *symval, char *alias)
518 {
519         DEF_FIELD(symval, serio_device_id, type);
520         DEF_FIELD(symval, serio_device_id, proto);
521         DEF_FIELD(symval, serio_device_id, id);
522         DEF_FIELD(symval, serio_device_id, extra);
523 
524         strcpy(alias, "serio:");
525         ADD(alias, "ty", type != SERIO_ANY, type);
526         ADD(alias, "pr", proto != SERIO_ANY, proto);
527         ADD(alias, "id", id != SERIO_ANY, id);
528         ADD(alias, "ex", extra != SERIO_ANY, extra);
529 
530         add_wildcard(alias);
531         return 1;
532 }
533 
534 /* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
535  *             "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
536  *
537  * NOTE: Each driver should use one of the following : _HID, _CIDs
538  *       or _CLS. Also, bb, ss, and pp can be substituted with ??
539  *       as don't care byte.
540  */
541 static int do_acpi_entry(const char *filename,
542                         void *symval, char *alias)
543 {
544         DEF_FIELD_ADDR(symval, acpi_device_id, id);
545         DEF_FIELD_ADDR(symval, acpi_device_id, cls);
546         DEF_FIELD_ADDR(symval, acpi_device_id, cls_msk);
547 
548         if (id && strlen((const char *)*id))
549                 sprintf(alias, "acpi*:%s:*", *id);
550         else if (cls) {
551                 int i, byte_shift, cnt = 0;
552                 unsigned int msk;
553 
554                 sprintf(&alias[cnt], "acpi*:");
555                 cnt = 6;
556                 for (i = 1; i <= 3; i++) {
557                         byte_shift = 8 * (3-i);
558                         msk = (*cls_msk >> byte_shift) & 0xFF;
559                         if (msk)
560                                 sprintf(&alias[cnt], "%02x",
561                                         (*cls >> byte_shift) & 0xFF);
562                         else
563                                 sprintf(&alias[cnt], "??");
564                         cnt += 2;
565                 }
566                 sprintf(&alias[cnt], ":*");
567         }
568         return 1;
569 }
570 
571 /* looks like: "pnp:dD" */
572 static void do_pnp_device_entry(void *symval, unsigned long size,
573                                 struct module *mod)
574 {
575         const unsigned long id_size = SIZE_pnp_device_id;
576         const unsigned int count = (size / id_size)-1;
577         unsigned int i;
578 
579         device_id_check(mod->name, "pnp", size, id_size, symval);
580 
581         for (i = 0; i < count; i++) {
582                 DEF_FIELD_ADDR(symval + i*id_size, pnp_device_id, id);
583                 char acpi_id[sizeof(*id)];
584                 int j;
585 
586                 buf_printf(&mod->dev_table_buf,
587                            "MODULE_ALIAS(\"pnp:d%s*\");\n", *id);
588 
589                 /* fix broken pnp bus lowercasing */
590                 for (j = 0; j < sizeof(acpi_id); j++)
591                         acpi_id[j] = toupper((*id)[j]);
592                 buf_printf(&mod->dev_table_buf,
593                            "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
594         }
595 }
596 
597 /* looks like: "pnp:dD" for every device of the card */
598 static void do_pnp_card_entries(void *symval, unsigned long size,
599                                 struct module *mod)
600 {
601         const unsigned long id_size = SIZE_pnp_card_device_id;
602         const unsigned int count = (size / id_size)-1;
603         unsigned int i;
604 
605         device_id_check(mod->name, "pnp", size, id_size, symval);
606 
607         for (i = 0; i < count; i++) {
608                 unsigned int j;
609                 DEF_FIELD_ADDR(symval + i * id_size, pnp_card_device_id, devs);
610 
611                 for (j = 0; j < PNP_MAX_DEVICES; j++) {
612                         const char *id = (char *)(*devs)[j].id;
613                         int i2, j2;
614                         int dup = 0;
615 
616                         if (!id[0])
617                                 break;
618 
619                         /* find duplicate, already added value */
620                         for (i2 = 0; i2 < i && !dup; i2++) {
621                                 DEF_FIELD_ADDR_VAR(symval + i2 * id_size,
622                                                    pnp_card_device_id,
623                                                    devs, devs_dup);
624 
625                                 for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
626                                         const char *id2 =
627                                                 (char *)(*devs_dup)[j2].id;
628 
629                                         if (!id2[0])
630                                                 break;
631 
632                                         if (!strcmp(id, id2)) {
633                                                 dup = 1;
634                                                 break;
635                                         }
636                                 }
637                         }
638 
639                         /* add an individual alias for every device entry */
640                         if (!dup) {
641                                 char acpi_id[PNP_ID_LEN];
642                                 int k;
643 
644                                 buf_printf(&mod->dev_table_buf,
645                                            "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
646 
647                                 /* fix broken pnp bus lowercasing */
648                                 for (k = 0; k < sizeof(acpi_id); k++)
649                                         acpi_id[k] = toupper(id[k]);
650                                 buf_printf(&mod->dev_table_buf,
651                                            "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
652                         }
653                 }
654         }
655 }
656 
657 /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
658 static int do_pcmcia_entry(const char *filename,
659                            void *symval, char *alias)
660 {
661         unsigned int i;
662         DEF_FIELD(symval, pcmcia_device_id, match_flags);
663         DEF_FIELD(symval, pcmcia_device_id, manf_id);
664         DEF_FIELD(symval, pcmcia_device_id, card_id);
665         DEF_FIELD(symval, pcmcia_device_id, func_id);
666         DEF_FIELD(symval, pcmcia_device_id, function);
667         DEF_FIELD(symval, pcmcia_device_id, device_no);
668         DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
669 
670         for (i=0; i<4; i++) {
671                 (*prod_id_hash)[i] = TO_NATIVE((*prod_id_hash)[i]);
672         }
673 
674         strcpy(alias, "pcmcia:");
675         ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
676             manf_id);
677         ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
678             card_id);
679         ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
680             func_id);
681         ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
682             function);
683         ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
684             device_no);
685         ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, (*prod_id_hash)[0]);
686         ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, (*prod_id_hash)[1]);
687         ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, (*prod_id_hash)[2]);
688         ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, (*prod_id_hash)[3]);
689 
690         add_wildcard(alias);
691         return 1;
692 }
693 
694 static int do_vio_entry(const char *filename, void *symval,
695                 char *alias)
696 {
697         char *tmp;
698         DEF_FIELD_ADDR(symval, vio_device_id, type);
699         DEF_FIELD_ADDR(symval, vio_device_id, compat);
700 
701         sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
702                         (*compat)[0] ? *compat : "*");
703 
704         /* Replace all whitespace with underscores */
705         for (tmp = alias; tmp && *tmp; tmp++)
706                 if (isspace (*tmp))
707                         *tmp = '_';
708 
709         add_wildcard(alias);
710         return 1;
711 }
712 
713 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
714 
715 static void do_input(char *alias,
716                      kernel_ulong_t *arr, unsigned int min, unsigned int max)
717 {
718         unsigned int i;
719 
720         for (i = min / BITS_PER_LONG; i < max / BITS_PER_LONG + 1; i++)
721                 arr[i] = TO_NATIVE(arr[i]);
722         for (i = min; i < max; i++)
723                 if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
724                         sprintf(alias + strlen(alias), "%X,*", i);
725 }
726 
727 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
728 static int do_input_entry(const char *filename, void *symval,
729                           char *alias)
730 {
731         DEF_FIELD(symval, input_device_id, flags);
732         DEF_FIELD(symval, input_device_id, bustype);
733         DEF_FIELD(symval, input_device_id, vendor);
734         DEF_FIELD(symval, input_device_id, product);
735         DEF_FIELD(symval, input_device_id, version);
736         DEF_FIELD_ADDR(symval, input_device_id, evbit);
737         DEF_FIELD_ADDR(symval, input_device_id, keybit);
738         DEF_FIELD_ADDR(symval, input_device_id, relbit);
739         DEF_FIELD_ADDR(symval, input_device_id, absbit);
740         DEF_FIELD_ADDR(symval, input_device_id, mscbit);
741         DEF_FIELD_ADDR(symval, input_device_id, ledbit);
742         DEF_FIELD_ADDR(symval, input_device_id, sndbit);
743         DEF_FIELD_ADDR(symval, input_device_id, ffbit);
744         DEF_FIELD_ADDR(symval, input_device_id, swbit);
745 
746         sprintf(alias, "input:");
747 
748         ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
749         ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
750         ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
751         ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);
752 
753         sprintf(alias + strlen(alias), "-e*");
754         if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
755                 do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
756         sprintf(alias + strlen(alias), "k*");
757         if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
758                 do_input(alias, *keybit,
759                          INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
760                          INPUT_DEVICE_ID_KEY_MAX);
761         sprintf(alias + strlen(alias), "r*");
762         if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
763                 do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
764         sprintf(alias + strlen(alias), "a*");
765         if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
766                 do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
767         sprintf(alias + strlen(alias), "m*");
768         if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
769                 do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
770         sprintf(alias + strlen(alias), "l*");
771         if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
772                 do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
773         sprintf(alias + strlen(alias), "s*");
774         if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
775                 do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
776         sprintf(alias + strlen(alias), "f*");
777         if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
778                 do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
779         sprintf(alias + strlen(alias), "w*");
780         if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
781                 do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
782         return 1;
783 }
784 
785 static int do_eisa_entry(const char *filename, void *symval,
786                 char *alias)
787 {
788         DEF_FIELD_ADDR(symval, eisa_device_id, sig);
789         if (sig[0])
790                 sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", *sig);
791         else
792                 strcat(alias, "*");
793         return 1;
794 }
795 
796 /* Looks like: parisc:tNhvNrevNsvN */
797 static int do_parisc_entry(const char *filename, void *symval,
798                 char *alias)
799 {
800         DEF_FIELD(symval, parisc_device_id, hw_type);
801         DEF_FIELD(symval, parisc_device_id, hversion);
802         DEF_FIELD(symval, parisc_device_id, hversion_rev);
803         DEF_FIELD(symval, parisc_device_id, sversion);
804 
805         strcpy(alias, "parisc:");
806         ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
807         ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
808         ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
809         ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);
810 
811         add_wildcard(alias);
812         return 1;
813 }
814 
815 /* Looks like: sdio:cNvNdN. */
816 static int do_sdio_entry(const char *filename,
817                         void *symval, char *alias)
818 {
819         DEF_FIELD(symval, sdio_device_id, class);
820         DEF_FIELD(symval, sdio_device_id, vendor);
821         DEF_FIELD(symval, sdio_device_id, device);
822 
823         strcpy(alias, "sdio:");
824         ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
825         ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
826         ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
827         add_wildcard(alias);
828         return 1;
829 }
830 
831 /* Looks like: ssb:vNidNrevN. */
832 static int do_ssb_entry(const char *filename,
833                         void *symval, char *alias)
834 {
835         DEF_FIELD(symval, ssb_device_id, vendor);
836         DEF_FIELD(symval, ssb_device_id, coreid);
837         DEF_FIELD(symval, ssb_device_id, revision);
838 
839         strcpy(alias, "ssb:");
840         ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
841         ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
842         ADD(alias, "rev", revision != SSB_ANY_REV, revision);
843         add_wildcard(alias);
844         return 1;
845 }
846 
847 /* Looks like: bcma:mNidNrevNclN. */
848 static int do_bcma_entry(const char *filename,
849                          void *symval, char *alias)
850 {
851         DEF_FIELD(symval, bcma_device_id, manuf);
852         DEF_FIELD(symval, bcma_device_id, id);
853         DEF_FIELD(symval, bcma_device_id, rev);
854         DEF_FIELD(symval, bcma_device_id, class);
855 
856         strcpy(alias, "bcma:");
857         ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
858         ADD(alias, "id", id != BCMA_ANY_ID, id);
859         ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
860         ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
861         add_wildcard(alias);
862         return 1;
863 }
864 
865 /* Looks like: virtio:dNvN */
866 static int do_virtio_entry(const char *filename, void *symval,
867                            char *alias)
868 {
869         DEF_FIELD(symval, virtio_device_id, device);
870         DEF_FIELD(symval, virtio_device_id, vendor);
871 
872         strcpy(alias, "virtio:");
873         ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
874         ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
875 
876         add_wildcard(alias);
877         return 1;
878 }
879 
880 /*
881  * Looks like: vmbus:guid
882  * Each byte of the guid will be represented by two hex characters
883  * in the name.
884  */
885 
886 static int do_vmbus_entry(const char *filename, void *symval,
887                           char *alias)
888 {
889         int i;
890         DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
891         char guid_name[(sizeof(*guid) + 1) * 2];
892 
893         for (i = 0; i < (sizeof(*guid) * 2); i += 2)
894                 sprintf(&guid_name[i], "%02x", TO_NATIVE((guid->b)[i/2]));
895 
896         strcpy(alias, "vmbus:");
897         strcat(alias, guid_name);
898 
899         return 1;
900 }
901 
902 /* Looks like: rpmsg:S */
903 static int do_rpmsg_entry(const char *filename, void *symval,
904                           char *alias)
905 {
906         DEF_FIELD_ADDR(symval, rpmsg_device_id, name);
907         sprintf(alias, RPMSG_DEVICE_MODALIAS_FMT, *name);
908 
909         return 1;
910 }
911 
912 /* Looks like: i2c:S */
913 static int do_i2c_entry(const char *filename, void *symval,
914                         char *alias)
915 {
916         DEF_FIELD_ADDR(symval, i2c_device_id, name);
917         sprintf(alias, I2C_MODULE_PREFIX "%s", *name);
918 
919         return 1;
920 }
921 
922 static int do_i3c_entry(const char *filename, void *symval,
923                         char *alias)
924 {
925         DEF_FIELD(symval, i3c_device_id, match_flags);
926         DEF_FIELD(symval, i3c_device_id, dcr);
927         DEF_FIELD(symval, i3c_device_id, manuf_id);
928         DEF_FIELD(symval, i3c_device_id, part_id);
929         DEF_FIELD(symval, i3c_device_id, extra_info);
930 
931         strcpy(alias, "i3c:");
932         ADD(alias, "dcr", match_flags & I3C_MATCH_DCR, dcr);
933         ADD(alias, "manuf", match_flags & I3C_MATCH_MANUF, manuf_id);
934         ADD(alias, "part", match_flags & I3C_MATCH_PART, part_id);
935         ADD(alias, "ext", match_flags & I3C_MATCH_EXTRA_INFO, extra_info);
936 
937         return 1;
938 }
939 
940 /* Looks like: spi:S */
941 static int do_spi_entry(const char *filename, void *symval,
942                         char *alias)
943 {
944         DEF_FIELD_ADDR(symval, spi_device_id, name);
945         sprintf(alias, SPI_MODULE_PREFIX "%s", *name);
946 
947         return 1;
948 }
949 
950 static const struct dmifield {
951         const char *prefix;
952         int field;
953 } dmi_fields[] = {
954         { "bvn", DMI_BIOS_VENDOR },
955         { "bvr", DMI_BIOS_VERSION },
956         { "bd",  DMI_BIOS_DATE },
957         { "br",  DMI_BIOS_RELEASE },
958         { "efr", DMI_EC_FIRMWARE_RELEASE },
959         { "svn", DMI_SYS_VENDOR },
960         { "pn",  DMI_PRODUCT_NAME },
961         { "pvr", DMI_PRODUCT_VERSION },
962         { "rvn", DMI_BOARD_VENDOR },
963         { "rn",  DMI_BOARD_NAME },
964         { "rvr", DMI_BOARD_VERSION },
965         { "cvn", DMI_CHASSIS_VENDOR },
966         { "ct",  DMI_CHASSIS_TYPE },
967         { "cvr", DMI_CHASSIS_VERSION },
968         { NULL,  DMI_NONE }
969 };
970 
971 static void dmi_ascii_filter(char *d, const char *s)
972 {
973         /* Filter out characters we don't want to see in the modalias string */
974         for (; *s; s++)
975                 if (*s > ' ' && *s < 127 && *s != ':')
976                         *(d++) = *s;
977 
978         *d = 0;
979 }
980 
981 
982 static int do_dmi_entry(const char *filename, void *symval,
983                         char *alias)
984 {
985         int i, j;
986         DEF_FIELD_ADDR(symval, dmi_system_id, matches);
987         sprintf(alias, "dmi*");
988 
989         for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
990                 for (j = 0; j < 4; j++) {
991                         if ((*matches)[j].slot &&
992                             (*matches)[j].slot == dmi_fields[i].field) {
993                                 sprintf(alias + strlen(alias), ":%s*",
994                                         dmi_fields[i].prefix);
995                                 dmi_ascii_filter(alias + strlen(alias),
996                                                  (*matches)[j].substr);
997                                 strcat(alias, "*");
998                         }
999                 }
1000         }
1001 
1002         strcat(alias, ":");
1003         return 1;
1004 }
1005 
1006 static int do_platform_entry(const char *filename,
1007                              void *symval, char *alias)
1008 {
1009         DEF_FIELD_ADDR(symval, platform_device_id, name);
1010         sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
1011         return 1;
1012 }
1013 
1014 static int do_mdio_entry(const char *filename,
1015                          void *symval, char *alias)
1016 {
1017         int i;
1018         DEF_FIELD(symval, mdio_device_id, phy_id);
1019         DEF_FIELD(symval, mdio_device_id, phy_id_mask);
1020 
1021         alias += sprintf(alias, MDIO_MODULE_PREFIX);
1022 
1023         for (i = 0; i < 32; i++) {
1024                 if (!((phy_id_mask >> (31-i)) & 1))
1025                         *(alias++) = '?';
1026                 else if ((phy_id >> (31-i)) & 1)
1027                         *(alias++) = '1';
1028                 else
1029                         *(alias++) = '';
1030         }
1031 
1032         /* Terminate the string */
1033         *alias = 0;
1034 
1035         return 1;
1036 }
1037 
1038 /* Looks like: zorro:iN. */
1039 static int do_zorro_entry(const char *filename, void *symval,
1040                           char *alias)
1041 {
1042         DEF_FIELD(symval, zorro_device_id, id);
1043         strcpy(alias, "zorro:");
1044         ADD(alias, "i", id != ZORRO_WILDCARD, id);
1045         return 1;
1046 }
1047 
1048 /* looks like: "pnp:dD" */
1049 static int do_isapnp_entry(const char *filename,
1050                            void *symval, char *alias)
1051 {
1052         DEF_FIELD(symval, isapnp_device_id, vendor);
1053         DEF_FIELD(symval, isapnp_device_id, function);
1054         sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
1055                 'A' + ((vendor >> 2) & 0x3f) - 1,
1056                 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
1057                 'A' + ((vendor >> 8) & 0x1f) - 1,
1058                 (function >> 4) & 0x0f, function & 0x0f,
1059                 (function >> 12) & 0x0f, (function >> 8) & 0x0f);
1060         return 1;
1061 }
1062 
1063 /* Looks like: "ipack:fNvNdN". */
1064 static int do_ipack_entry(const char *filename,
1065                           void *symval, char *alias)
1066 {
1067         DEF_FIELD(symval, ipack_device_id, format);
1068         DEF_FIELD(symval, ipack_device_id, vendor);
1069         DEF_FIELD(symval, ipack_device_id, device);
1070         strcpy(alias, "ipack:");
1071         ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
1072         ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
1073         ADD(alias, "d", device != IPACK_ANY_ID, device);
1074         add_wildcard(alias);
1075         return 1;
1076 }
1077 
1078 /*
1079  * Append a match expression for a single masked hex digit.
1080  * outp points to a pointer to the character at which to append.
1081  *      *outp is updated on return to point just after the appended text,
1082  *      to facilitate further appending.
1083  */
1084 static void append_nibble_mask(char **outp,
1085                                unsigned int nibble, unsigned int mask)
1086 {
1087         char *p = *outp;
1088         unsigned int i;
1089 
1090         switch (mask) {
1091         case 0:
1092                 *p++ = '?';
1093                 break;
1094 
1095         case 0xf:
1096                 p += sprintf(p, "%X",  nibble);
1097                 break;
1098 
1099         default:
1100                 /*
1101                  * Dumbly emit a match pattern for all possible matching
1102                  * digits.  This could be improved in some cases using ranges,
1103                  * but it has the advantage of being trivially correct, and is
1104                  * often optimal.
1105                  */
1106                 *p++ = '[';
1107                 for (i = 0; i < 0x10; i++)
1108                         if ((i & mask) == nibble)
1109                                 p += sprintf(p, "%X", i);
1110                 *p++ = ']';
1111         }
1112 
1113         /* Ensure that the string remains NUL-terminated: */
1114         *p = '\0';
1115 
1116         /* Advance the caller's end-of-string pointer: */
1117         *outp = p;
1118 }
1119 
1120 /*
1121  * looks like: "amba:dN"
1122  *
1123  * N is exactly 8 digits, where each is an upper-case hex digit, or
1124  *      a ? or [] pattern matching exactly one digit.
1125  */
1126 static int do_amba_entry(const char *filename,
1127                          void *symval, char *alias)
1128 {
1129         unsigned int digit;
1130         char *p = alias;
1131         DEF_FIELD(symval, amba_id, id);
1132         DEF_FIELD(symval, amba_id, mask);
1133 
1134         if ((id & mask) != id)
1135                 fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: "
1136                       "id=0x%08X, mask=0x%08X.  Please fix this driver.\n",
1137                       filename, id, mask);
1138 
1139         p += sprintf(alias, "amba:d");
1140         for (digit = 0; digit < 8; digit++)
1141                 append_nibble_mask(&p,
1142                                    (id >> (4 * (7 - digit))) & 0xf,
1143                                    (mask >> (4 * (7 - digit))) & 0xf);
1144 
1145         return 1;
1146 }
1147 
1148 /*
1149  * looks like: "mipscdmm:tN"
1150  *
1151  * N is exactly 2 digits, where each is an upper-case hex digit, or
1152  *      a ? or [] pattern matching exactly one digit.
1153  */
1154 static int do_mips_cdmm_entry(const char *filename,
1155                               void *symval, char *alias)
1156 {
1157         DEF_FIELD(symval, mips_cdmm_device_id, type);
1158 
1159         sprintf(alias, "mipscdmm:t%02X*", type);
1160         return 1;
1161 }
1162 
1163 /* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
1164  * All fields are numbers. It would be nicer to use strings for vendor
1165  * and feature, but getting those out of the build system here is too
1166  * complicated.
1167  */
1168 
1169 static int do_x86cpu_entry(const char *filename, void *symval,
1170                            char *alias)
1171 {
1172         DEF_FIELD(symval, x86_cpu_id, feature);
1173         DEF_FIELD(symval, x86_cpu_id, family);
1174         DEF_FIELD(symval, x86_cpu_id, model);
1175         DEF_FIELD(symval, x86_cpu_id, vendor);
1176 
1177         strcpy(alias, "cpu:type:x86,");
1178         ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor);
1179         ADD(alias, "fam", family != X86_FAMILY_ANY, family);
1180         ADD(alias, "mod", model  != X86_MODEL_ANY,  model);
1181         strcat(alias, ":feature:*");
1182         if (feature != X86_FEATURE_ANY)
1183                 sprintf(alias + strlen(alias), "%04X*", feature);
1184         return 1;
1185 }
1186 
1187 /* LOOKS like cpu:type:*:feature:*FEAT* */
1188 static int do_cpu_entry(const char *filename, void *symval, char *alias)
1189 {
1190         DEF_FIELD(symval, cpu_feature, feature);
1191 
1192         sprintf(alias, "cpu:type:*:feature:*%04X*", feature);
1193         return 1;
1194 }
1195 
1196 /* Looks like: mei:S:uuid:N:* */
1197 static int do_mei_entry(const char *filename, void *symval,
1198                         char *alias)
1199 {
1200         DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
1201         DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid);
1202         DEF_FIELD(symval, mei_cl_device_id, version);
1203 
1204         sprintf(alias, MEI_CL_MODULE_PREFIX);
1205         sprintf(alias + strlen(alias), "%s:",  (*name)[0]  ? *name : "*");
1206         add_uuid(alias, *uuid);
1207         ADD(alias, ":", version != MEI_CL_VERSION_ANY, version);
1208 
1209         strcat(alias, ":*");
1210 
1211         return 1;
1212 }
1213 
1214 /* Looks like: rapidio:vNdNavNadN */
1215 static int do_rio_entry(const char *filename,
1216                         void *symval, char *alias)
1217 {
1218         DEF_FIELD(symval, rio_device_id, did);
1219         DEF_FIELD(symval, rio_device_id, vid);
1220         DEF_FIELD(symval, rio_device_id, asm_did);
1221         DEF_FIELD(symval, rio_device_id, asm_vid);
1222 
1223         strcpy(alias, "rapidio:");
1224         ADD(alias, "v", vid != RIO_ANY_ID, vid);
1225         ADD(alias, "d", did != RIO_ANY_ID, did);
1226         ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
1227         ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
1228 
1229         add_wildcard(alias);
1230         return 1;
1231 }
1232 
1233 /* Looks like: ulpi:vNpN */
1234 static int do_ulpi_entry(const char *filename, void *symval,
1235                          char *alias)
1236 {
1237         DEF_FIELD(symval, ulpi_device_id, vendor);
1238         DEF_FIELD(symval, ulpi_device_id, product);
1239 
1240         sprintf(alias, "ulpi:v%04xp%04x", vendor, product);
1241 
1242         return 1;
1243 }
1244 
1245 /* Looks like: hdaudio:vNrNaN */
1246 static int do_hda_entry(const char *filename, void *symval, char *alias)
1247 {
1248         DEF_FIELD(symval, hda_device_id, vendor_id);
1249         DEF_FIELD(symval, hda_device_id, rev_id);
1250         DEF_FIELD(symval, hda_device_id, api_version);
1251 
1252         strcpy(alias, "hdaudio:");
1253         ADD(alias, "v", vendor_id != 0, vendor_id);
1254         ADD(alias, "r", rev_id != 0, rev_id);
1255         ADD(alias, "a", api_version != 0, api_version);
1256 
1257         add_wildcard(alias);
1258         return 1;
1259 }
1260 
1261 /* Looks like: sdw:mNpNvNcN */
1262 static int do_sdw_entry(const char *filename, void *symval, char *alias)
1263 {
1264         DEF_FIELD(symval, sdw_device_id, mfg_id);
1265         DEF_FIELD(symval, sdw_device_id, part_id);
1266         DEF_FIELD(symval, sdw_device_id, sdw_version);
1267         DEF_FIELD(symval, sdw_device_id, class_id);
1268 
1269         strcpy(alias, "sdw:");
1270         ADD(alias, "m", mfg_id != 0, mfg_id);
1271         ADD(alias, "p", part_id != 0, part_id);
1272         ADD(alias, "v", sdw_version != 0, sdw_version);
1273         ADD(alias, "c", class_id != 0, class_id);
1274 
1275         add_wildcard(alias);
1276         return 1;
1277 }
1278 
1279 /* Looks like: fsl-mc:vNdN */
1280 static int do_fsl_mc_entry(const char *filename, void *symval,
1281                            char *alias)
1282 {
1283         DEF_FIELD(symval, fsl_mc_device_id, vendor);
1284         DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type);
1285 
1286         sprintf(alias, "fsl-mc:v%08Xd%s", vendor, *obj_type);
1287         return 1;
1288 }
1289 
1290 /* Looks like: tbsvc:kSpNvNrN */
1291 static int do_tbsvc_entry(const char *filename, void *symval, char *alias)
1292 {
1293         DEF_FIELD(symval, tb_service_id, match_flags);
1294         DEF_FIELD_ADDR(symval, tb_service_id, protocol_key);
1295         DEF_FIELD(symval, tb_service_id, protocol_id);
1296         DEF_FIELD(symval, tb_service_id, protocol_version);
1297         DEF_FIELD(symval, tb_service_id, protocol_revision);
1298 
1299         strcpy(alias, "tbsvc:");
1300         if (match_flags & TBSVC_MATCH_PROTOCOL_KEY)
1301                 sprintf(alias + strlen(alias), "k%s", *protocol_key);
1302         else
1303                 strcat(alias + strlen(alias), "k*");
1304         ADD(alias, "p", match_flags & TBSVC_MATCH_PROTOCOL_ID, protocol_id);
1305         ADD(alias, "v", match_flags & TBSVC_MATCH_PROTOCOL_VERSION,
1306             protocol_version);
1307         ADD(alias, "r", match_flags & TBSVC_MATCH_PROTOCOL_REVISION,
1308             protocol_revision);
1309 
1310         add_wildcard(alias);
1311         return 1;
1312 }
1313 
1314 /* Looks like: typec:idNmN */
1315 static int do_typec_entry(const char *filename, void *symval, char *alias)
1316 {
1317         DEF_FIELD(symval, typec_device_id, svid);
1318         DEF_FIELD(symval, typec_device_id, mode);
1319 
1320         sprintf(alias, "typec:id%04X", svid);
1321         ADD(alias, "m", mode != TYPEC_ANY_MODE, mode);
1322 
1323         return 1;
1324 }
1325 
1326 /* Looks like: tee:uuid */
1327 static int do_tee_entry(const char *filename, void *symval, char *alias)
1328 {
1329         DEF_FIELD(symval, tee_client_device_id, uuid);
1330 
1331         sprintf(alias, "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
1332                 uuid.b[0], uuid.b[1], uuid.b[2], uuid.b[3], uuid.b[4],
1333                 uuid.b[5], uuid.b[6], uuid.b[7], uuid.b[8], uuid.b[9],
1334                 uuid.b[10], uuid.b[11], uuid.b[12], uuid.b[13], uuid.b[14],
1335                 uuid.b[15]);
1336 
1337         add_wildcard(alias);
1338         return 1;
1339 }
1340 
1341 /* Looks like: wmi:guid */
1342 static int do_wmi_entry(const char *filename, void *symval, char *alias)
1343 {
1344         int len;
1345         DEF_FIELD_ADDR(symval, wmi_device_id, guid_string);
1346 
1347         if (strlen(*guid_string) != UUID_STRING_LEN) {
1348                 warn("Invalid WMI device id 'wmi:%s' in '%s'\n",
1349                                 *guid_string, filename);
1350                 return 0;
1351         }
1352 
1353         len = snprintf(alias, ALIAS_SIZE, WMI_MODULE_PREFIX "%s", *guid_string);
1354         if (len < 0 || len >= ALIAS_SIZE) {
1355                 warn("Could not generate all MODULE_ALIAS's in '%s'\n",
1356                                 filename);
1357                 return 0;
1358         }
1359         return 1;
1360 }
1361 
1362 /* Looks like: mhi:S */
1363 static int do_mhi_entry(const char *filename, void *symval, char *alias)
1364 {
1365         DEF_FIELD_ADDR(symval, mhi_device_id, chan);
1366         sprintf(alias, MHI_DEVICE_MODALIAS_FMT, *chan);
1367         return 1;
1368 }
1369 
1370 static int do_auxiliary_entry(const char *filename, void *symval, char *alias)
1371 {
1372         DEF_FIELD_ADDR(symval, auxiliary_device_id, name);
1373         sprintf(alias, AUXILIARY_MODULE_PREFIX "%s", *name);
1374 
1375         return 1;
1376 }
1377 
1378 /* Does namelen bytes of name exactly match the symbol? */
1379 static bool sym_is(const char *name, unsigned namelen, const char *symbol)
1380 {
1381         if (namelen != strlen(symbol))
1382                 return false;
1383 
1384         return memcmp(name, symbol, namelen) == 0;
1385 }
1386 
1387 static void do_table(void *symval, unsigned long size,
1388                      unsigned long id_size,
1389                      const char *device_id,
1390                      int (*do_entry)(const char *filename, void *symval, char *alias),
1391                      struct module *mod)
1392 {
1393         unsigned int i;
1394         char alias[ALIAS_SIZE];
1395 
1396         device_id_check(mod->name, device_id, size, id_size, symval);
1397         /* Leave last one: it's the terminator. */
1398         size -= id_size;
1399 
1400         for (i = 0; i < size; i += id_size) {
1401                 if (do_entry(mod->name, symval+i, alias)) {
1402                         buf_printf(&mod->dev_table_buf,
1403                                    "MODULE_ALIAS(\"%s\");\n", alias);
1404                 }
1405         }
1406 }
1407 
1408 static const struct devtable devtable[] = {
1409         {"hid", SIZE_hid_device_id, do_hid_entry},
1410         {"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry},
1411         {"pci", SIZE_pci_device_id, do_pci_entry},
1412         {"ccw", SIZE_ccw_device_id, do_ccw_entry},
1413         {"ap", SIZE_ap_device_id, do_ap_entry},
1414         {"css", SIZE_css_device_id, do_css_entry},
1415         {"serio", SIZE_serio_device_id, do_serio_entry},
1416         {"acpi", SIZE_acpi_device_id, do_acpi_entry},
1417         {"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry},
1418         {"vio", SIZE_vio_device_id, do_vio_entry},
1419         {"input", SIZE_input_device_id, do_input_entry},
1420         {"eisa", SIZE_eisa_device_id, do_eisa_entry},
1421         {"parisc", SIZE_parisc_device_id, do_parisc_entry},
1422         {"sdio", SIZE_sdio_device_id, do_sdio_entry},
1423         {"ssb", SIZE_ssb_device_id, do_ssb_entry},
1424         {"bcma", SIZE_bcma_device_id, do_bcma_entry},
1425         {"virtio", SIZE_virtio_device_id, do_virtio_entry},
1426         {"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry},
1427         {"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry},
1428         {"i2c", SIZE_i2c_device_id, do_i2c_entry},
1429         {"i3c", SIZE_i3c_device_id, do_i3c_entry},
1430         {"spi", SIZE_spi_device_id, do_spi_entry},
1431         {"dmi", SIZE_dmi_system_id, do_dmi_entry},
1432         {"platform", SIZE_platform_device_id, do_platform_entry},
1433         {"mdio", SIZE_mdio_device_id, do_mdio_entry},
1434         {"zorro", SIZE_zorro_device_id, do_zorro_entry},
1435         {"isapnp", SIZE_isapnp_device_id, do_isapnp_entry},
1436         {"ipack", SIZE_ipack_device_id, do_ipack_entry},
1437         {"amba", SIZE_amba_id, do_amba_entry},
1438         {"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry},
1439         {"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry},
1440         {"cpu", SIZE_cpu_feature, do_cpu_entry},
1441         {"mei", SIZE_mei_cl_device_id, do_mei_entry},
1442         {"rapidio", SIZE_rio_device_id, do_rio_entry},
1443         {"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
1444         {"hdaudio", SIZE_hda_device_id, do_hda_entry},
1445         {"sdw", SIZE_sdw_device_id, do_sdw_entry},
1446         {"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry},
1447         {"tbsvc", SIZE_tb_service_id, do_tbsvc_entry},
1448         {"typec", SIZE_typec_device_id, do_typec_entry},
1449         {"tee", SIZE_tee_client_device_id, do_tee_entry},
1450         {"wmi", SIZE_wmi_device_id, do_wmi_entry},
1451         {"mhi", SIZE_mhi_device_id, do_mhi_entry},
1452         {"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry},
1453 };
1454 
1455 /* Create MODULE_ALIAS() statements.
1456  * At this time, we cannot write the actual output C source yet,
1457  * so we write into the mod->dev_table_buf buffer. */
1458 void handle_moddevtable(struct module *mod, struct elf_info *info,
1459                         Elf_Sym *sym, const char *symname)
1460 {
1461         void *symval;
1462         char *zeros = NULL;
1463         const char *name, *identifier;
1464         unsigned int namelen;
1465 
1466         /* We're looking for a section relative symbol */
1467         if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
1468                 return;
1469 
1470         /* We're looking for an object */
1471         if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
1472                 return;
1473 
1474         /* All our symbols are of form __mod_<name>__<identifier>_device_table. */
1475         if (strncmp(symname, "__mod_", strlen("__mod_")))
1476                 return;
1477         name = symname + strlen("__mod_");
1478         namelen = strlen(name);
1479         if (namelen < strlen("_device_table"))
1480                 return;
1481         if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
1482                 return;
1483         identifier = strstr(name, "__");
1484         if (!identifier)
1485                 return;
1486         namelen = identifier - name;
1487 
1488         /* Handle all-NULL symbols allocated into .bss */
1489         if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
1490                 zeros = calloc(1, sym->st_size);
1491                 symval = zeros;
1492         } else {
1493                 symval = (void *)info->hdr
1494                         + info->sechdrs[get_secindex(info, sym)].sh_offset
1495                         + sym->st_value;
1496         }
1497 
1498         /* First handle the "special" cases */
1499         if (sym_is(name, namelen, "usb"))
1500                 do_usb_table(symval, sym->st_size, mod);
1501         if (sym_is(name, namelen, "of"))
1502                 do_of_table(symval, sym->st_size, mod);
1503         else if (sym_is(name, namelen, "pnp"))
1504                 do_pnp_device_entry(symval, sym->st_size, mod);
1505         else if (sym_is(name, namelen, "pnp_card"))
1506                 do_pnp_card_entries(symval, sym->st_size, mod);
1507         else {
1508                 int i;
1509 
1510                 for (i = 0; i < ARRAY_SIZE(devtable); i++) {
1511                         const struct devtable *p = &devtable[i];
1512 
1513                         if (sym_is(name, namelen, p->device_id)) {
1514                                 do_table(symval, sym->st_size, p->id_size,
1515                                          p->device_id, p->do_entry, mod);
1516                                 break;
1517                         }
1518                 }
1519         }
1520         free(zeros);
1521 }
1522 
1523 /* Now add out buffered information to the generated C source */
1524 void add_moddevtable(struct buffer *buf, struct module *mod)
1525 {
1526         buf_printf(buf, "\n");
1527         buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
1528         free(mod->dev_table_buf.p);
1529 }
1530 

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