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

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