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

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