projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
kbuild: support building individual files for external modules
[linux-2.6-block.git] / scripts / mod / file2alias.c
CommitLineData
1da177e4
LT		 1/* Simple code to turn various tables in an ELF file into alias definitions.
2 * This deals with kernel datastructures where they should be
3 * dealt with: in the kernel source.
4 *
5 * Copyright 2002-2003 Rusty Russell, IBM Corporation
6 * 2003 Kai Germaschewski
7 *
8 *
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
11 */
12
13#include "modpost.h"
14
15/* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
16 * use either stdint.h or inttypes.h for the rest. */
17#if KERNEL_ELFCLASS == ELFCLASS32
18typedef Elf32_Addr kernel_ulong_t;
1d8f430c 19#define BITS_PER_LONG 32
1da177e4
LT		 20#else
21typedef Elf64_Addr kernel_ulong_t;
1d8f430c 22#define BITS_PER_LONG 64
1da177e4
LT		 23#endif
24#ifdef __sun__
25#include <inttypes.h>
26#else
27#include <stdint.h>
28#endif
29
5e655772
JM		 30#include <ctype.h>
31
1da177e4
LT		 32typedef uint32_t __u32;
33typedef uint16_t __u16;
34typedef unsigned char __u8;
35
36/* Big exception to the "don't include kernel headers into userspace, which
37 * even potentially has different endianness and word sizes, since
38 * we handle those differences explicitly below */
39#include "../../include/linux/mod_devicetable.h"
1d8f430c 40#include "../../include/linux/input.h"
1da177e4
LT		 41
42#define ADD(str, sep, cond, field) \
43do { \
44 strcat(str, sep); \
45 if (cond) \
46 sprintf(str + strlen(str), \
47 sizeof(field) == 1 ? "%02X" : \
48 sizeof(field) == 2 ? "%04X" : \
49 sizeof(field) == 4 ? "%08X" : "", \
50 field); \
51 else \
52 sprintf(str + strlen(str), "*"); \
53} while(0)
54
b19dcd93
RK		 55/* USB is special because the bcdDevice can be matched against a numeric range */
56/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipN" */
57static void do_usb_entry(struct usb_device_id *id,
58 unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
59 unsigned char range_lo, unsigned char range_hi,
60 struct module *mod)
1da177e4 61{
b19dcd93 62 char alias[500];
1da177e4
LT		 63 strcpy(alias, "usb:");
64 ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR,
65 id->idVendor);
66 ADD(alias, "p", id->match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
67 id->idProduct);
b19dcd93
RK		 68
69 strcat(alias, "d");
70 if (bcdDevice_initial_digits)
71 sprintf(alias + strlen(alias), "%0*X",
72 bcdDevice_initial_digits, bcdDevice_initial);
73 if (range_lo == range_hi)
74 sprintf(alias + strlen(alias), "%u", range_lo);
75 else if (range_lo > 0 || range_hi < 9)
76 sprintf(alias + strlen(alias), "[%u-%u]", range_lo, range_hi);
77 if (bcdDevice_initial_digits < (sizeof(id->bcdDevice_lo) * 2 - 1))
78 strcat(alias, "*");
79
1da177e4
LT		 80 ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
81 id->bDeviceClass);
82 ADD(alias, "dsc",
83 id->match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
84 id->bDeviceSubClass);
85 ADD(alias, "dp",
86 id->match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
87 id->bDeviceProtocol);
88 ADD(alias, "ic",
89 id->match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
90 id->bInterfaceClass);
91 ADD(alias, "isc",
92 id->match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
93 id->bInterfaceSubClass);
94 ADD(alias, "ip",
95 id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
96 id->bInterfaceProtocol);
b19dcd93
RK		 97
98 /* Always end in a wildcard, for future extension */
99 if (alias[strlen(alias)-1] != '*')
100 strcat(alias, "*");
101 buf_printf(&mod->dev_table_buf,
102 "MODULE_ALIAS(\"%s\");\n", alias);
103}
104
105static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod)
106{
107 unsigned int devlo, devhi;
108 unsigned char chi, clo;
109 int ndigits;
110
111 id->match_flags = TO_NATIVE(id->match_flags);
112 id->idVendor = TO_NATIVE(id->idVendor);
113 id->idProduct = TO_NATIVE(id->idProduct);
114
115 devlo = id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
116 TO_NATIVE(id->bcdDevice_lo) : 0x0U;
117 devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
118 TO_NATIVE(id->bcdDevice_hi) : ~0x0U;
119
120 /*
121 * Some modules (visor) have empty slots as placeholder for
122 * run-time specification that results in catch-all alias
123 */
124 if (!(id->idVendor | id->bDeviceClass | id->bInterfaceClass))
125 return;
126
127 /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
128 for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
129 clo = devlo & 0xf;
130 chi = devhi & 0xf;
131 if (chi > 9) /* it's bcd not hex */
132 chi = 9;
133 devlo >>= 4;
134 devhi >>= 4;
135
136 if (devlo == devhi || !ndigits) {
137 do_usb_entry(id, devlo, ndigits, clo, chi, mod);
138 break;
139 }
140
141 if (clo > 0)
142 do_usb_entry(id, devlo++, ndigits, clo, 9, mod);
143
144 if (chi < 9)
145 do_usb_entry(id, devhi--, ndigits, 0, chi, mod);
146 }
147}
148
149static void do_usb_table(void *symval, unsigned long size,
150 struct module *mod)
151{
152 unsigned int i;
153 const unsigned long id_size = sizeof(struct usb_device_id);
154
155 if (size % id_size || size < id_size) {
156 fprintf(stderr, "*** Warning: %s ids %lu bad size "
157 "(each on %lu)\n", mod->name, size, id_size);
158 }
159 /* Leave last one: it's the terminator. */
160 size -= id_size;
161
162 for (i = 0; i < size; i += id_size)
163 do_usb_entry_multi(symval + i, mod);
1da177e4
LT		 164}
165
166/* Looks like: ieee1394:venNmoNspNverN */
167static int do_ieee1394_entry(const char *filename,
168 struct ieee1394_device_id *id, char *alias)
169{
170 id->match_flags = TO_NATIVE(id->match_flags);
171 id->vendor_id = TO_NATIVE(id->vendor_id);
172 id->model_id = TO_NATIVE(id->model_id);
173 id->specifier_id = TO_NATIVE(id->specifier_id);
174 id->version = TO_NATIVE(id->version);
175
176 strcpy(alias, "ieee1394:");
177 ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID,
178 id->vendor_id);
179 ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID,
180 id->model_id);
181 ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID,
182 id->specifier_id);
183 ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION,
184 id->version);
185
186 return 1;
187}
188
189/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
190static int do_pci_entry(const char *filename,
191 struct pci_device_id *id, char *alias)
192{
193 /* Class field can be divided into these three. */
194 unsigned char baseclass, subclass, interface,
195 baseclass_mask, subclass_mask, interface_mask;
196
197 id->vendor = TO_NATIVE(id->vendor);
198 id->device = TO_NATIVE(id->device);
199 id->subvendor = TO_NATIVE(id->subvendor);
200 id->subdevice = TO_NATIVE(id->subdevice);
201 id->class = TO_NATIVE(id->class);
202 id->class_mask = TO_NATIVE(id->class_mask);
203
204 strcpy(alias, "pci:");
205 ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor);
206 ADD(alias, "d", id->device != PCI_ANY_ID, id->device);
207 ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor);
208 ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice);
209
210 baseclass = (id->class) >> 16;
211 baseclass_mask = (id->class_mask) >> 16;
212 subclass = (id->class) >> 8;
213 subclass_mask = (id->class_mask) >> 8;
214 interface = id->class;
215 interface_mask = id->class_mask;
216
217 if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
218 || (subclass_mask != 0 && subclass_mask != 0xFF)
219 || (interface_mask != 0 && interface_mask != 0xFF)) {
220 fprintf(stderr,
221 "*** Warning: Can't handle masks in %s:%04X\n",
222 filename, id->class_mask);
223 return 0;
224 }
225
226 ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
227 ADD(alias, "sc", subclass_mask == 0xFF, subclass);
228 ADD(alias, "i", interface_mask == 0xFF, interface);
229 return 1;
230}
231
232/* looks like: "ccw:tNmNdtNdmN" */
233static int do_ccw_entry(const char *filename,
234 struct ccw_device_id *id, char *alias)
235{
236 id->match_flags = TO_NATIVE(id->match_flags);
237 id->cu_type = TO_NATIVE(id->cu_type);
238 id->cu_model = TO_NATIVE(id->cu_model);
239 id->dev_type = TO_NATIVE(id->dev_type);
240 id->dev_model = TO_NATIVE(id->dev_model);
241
242 strcpy(alias, "ccw:");
243 ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
244 id->cu_type);
245 ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
246 id->cu_model);
247 ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
248 id->dev_type);
249 ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
250 id->dev_model);
251 return 1;
252}
253
254/* Looks like: "serio:tyNprNidNexN" */
255static int do_serio_entry(const char *filename,
256 struct serio_device_id *id, char *alias)
257{
258 id->type = TO_NATIVE(id->type);
259 id->proto = TO_NATIVE(id->proto);
260 id->id = TO_NATIVE(id->id);
261 id->extra = TO_NATIVE(id->extra);
262
263 strcpy(alias, "serio:");
264 ADD(alias, "ty", id->type != SERIO_ANY, id->type);
265 ADD(alias, "pr", id->proto != SERIO_ANY, id->proto);
266 ADD(alias, "id", id->id != SERIO_ANY, id->id);
267 ADD(alias, "ex", id->extra != SERIO_ANY, id->extra);
268
269 return 1;
270}
271
272/* looks like: "pnp:dD" */
273static int do_pnp_entry(const char *filename,
274 struct pnp_device_id *id, char *alias)
275{
276 sprintf(alias, "pnp:d%s", id->id);
277 return 1;
278}
279
280/* looks like: "pnp:cCdD..." */
281static int do_pnp_card_entry(const char *filename,
282 struct pnp_card_device_id *id, char *alias)
283{
284 int i;
285
286 sprintf(alias, "pnp:c%s", id->id);
287 for (i = 0; i < PNP_MAX_DEVICES; i++) {
288 if (! *id->devs[i].id)
289 break;
290 sprintf(alias + strlen(alias), "d%s", id->devs[i].id);
291 }
292 return 1;
293}
294
90829cfe
DB		 295/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
296static int do_pcmcia_entry(const char *filename,
297 struct pcmcia_device_id *id, char *alias)
298{
299 unsigned int i;
300
4fb7edce 301 id->match_flags = TO_NATIVE(id->match_flags);
90829cfe
DB		 302 id->manf_id = TO_NATIVE(id->manf_id);
303 id->card_id = TO_NATIVE(id->card_id);
304 id->func_id = TO_NATIVE(id->func_id);
305 id->function = TO_NATIVE(id->function);
306 id->device_no = TO_NATIVE(id->device_no);
4fb7edce 307
90829cfe
DB		 308 for (i=0; i<4; i++) {
309 id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]);
310 }
311
312 strcpy(alias, "pcmcia:");
313 ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
314 id->manf_id);
315 ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
316 id->card_id);
317 ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
318 id->func_id);
319 ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
320 id->function);
321 ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
322 id->device_no);
323 ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]);
324 ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]);
325 ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]);
326 ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]);
327
328 return 1;
329}
330
331
332
5e655772
JM		 333static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
334{
335 char *tmp;
336 sprintf (alias, "of:N%sT%sC%s",
337 of->name[0] ? of->name : "*",
338 of->type[0] ? of->type : "*",
339 of->compatible[0] ? of->compatible : "*");
340
341 /* Replace all whitespace with underscores */
342 for (tmp = alias; tmp && *tmp; tmp++)
343 if (isspace (*tmp))
344 *tmp = '_';
345
346 return 1;
347}
348
fb120da6
SR		 349static int do_vio_entry(const char *filename, struct vio_device_id *vio,
350 char *alias)
351{
352 char *tmp;
353
354 sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*",
355 vio->compat[0] ? vio->compat : "*");
356
357 /* Replace all whitespace with underscores */
358 for (tmp = alias; tmp && *tmp; tmp++)
359 if (isspace (*tmp))
360 *tmp = '_';
361
362 return 1;
363}
364
a9d1b24d
GKH		 365static int do_i2c_entry(const char *filename, struct i2c_device_id *i2c, char *alias)
366{
367 strcpy(alias, "i2c:");
368 ADD(alias, "id", 1, i2c->id);
369 return 1;
370}
371
1d8f430c
RR		 372#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
373
374static void do_input(char *alias,
375 kernel_ulong_t *arr, unsigned int min, unsigned int max)
376{
377 unsigned int i;
378 for (i = min; i < max; i++) {
379 if (arr[i/BITS_PER_LONG] & (1 << (i%BITS_PER_LONG)))
380 sprintf(alias+strlen(alias), "%X,*", i);
381 }
382}
383
384/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
385static int do_input_entry(const char *filename, struct input_device_id *id,
386 char *alias)
387{
388 sprintf(alias, "input:");
389
390 ADD(alias, "b", id->flags&INPUT_DEVICE_ID_MATCH_BUS, id->id.bustype);
391 ADD(alias, "v", id->flags&INPUT_DEVICE_ID_MATCH_VENDOR, id->id.vendor);
392 ADD(alias, "p", id->flags&INPUT_DEVICE_ID_MATCH_PRODUCT,
393 id->id.product);
394 ADD(alias, "e", id->flags&INPUT_DEVICE_ID_MATCH_VERSION,
395 id->id.version);
396
397 sprintf(alias + strlen(alias), "-e*");
398 if (id->flags&INPUT_DEVICE_ID_MATCH_EVBIT)
399 do_input(alias, id->evbit, 0, EV_MAX);
400 sprintf(alias + strlen(alias), "k*");
401 if (id->flags&INPUT_DEVICE_ID_MATCH_KEYBIT)
402 do_input(alias, id->keybit, KEY_MIN_INTERESTING, KEY_MAX);
403 sprintf(alias + strlen(alias), "r*");
404 if (id->flags&INPUT_DEVICE_ID_MATCH_RELBIT)
405 do_input(alias, id->relbit, 0, REL_MAX);
406 sprintf(alias + strlen(alias), "a*");
407 if (id->flags&INPUT_DEVICE_ID_MATCH_ABSBIT)
408 do_input(alias, id->absbit, 0, ABS_MAX);
409 sprintf(alias + strlen(alias), "m*");
410 if (id->flags&INPUT_DEVICE_ID_MATCH_MSCIT)
411 do_input(alias, id->mscbit, 0, MSC_MAX);
412 sprintf(alias + strlen(alias), "l*");
413 if (id->flags&INPUT_DEVICE_ID_MATCH_LEDBIT)
414 do_input(alias, id->ledbit, 0, LED_MAX);
415 sprintf(alias + strlen(alias), "s*");
416 if (id->flags&INPUT_DEVICE_ID_MATCH_SNDBIT)
417 do_input(alias, id->sndbit, 0, SND_MAX);
418 sprintf(alias + strlen(alias), "f*");
419 if (id->flags&INPUT_DEVICE_ID_MATCH_FFBIT)
cc6fa432 420 do_input(alias, id->ffbit, 0, FF_MAX);
1d8f430c
RR		 421 sprintf(alias + strlen(alias), "w*");
422 if (id->flags&INPUT_DEVICE_ID_MATCH_SWBIT)
423 do_input(alias, id->swbit, 0, SW_MAX);
424 return 1;
425}
426
1da177e4
LT		 427/* Ignore any prefix, eg. v850 prepends _ */
428static inline int sym_is(const char *symbol, const char *name)
429{
430 const char *match;
431
432 match = strstr(symbol, name);
433 if (!match)
434 return 0;
435 return match[strlen(symbol)] == '\0';
436}
437
438static void do_table(void *symval, unsigned long size,
439 unsigned long id_size,
440 void *function,
441 struct module *mod)
442{
443 unsigned int i;
444 char alias[500];
445 int (*do_entry)(const char *, void *entry, char *alias) = function;
446
447 if (size % id_size || size < id_size) {
448 fprintf(stderr, "*** Warning: %s ids %lu bad size "
449 "(each on %lu)\n", mod->name, size, id_size);
450 }
451 /* Leave last one: it's the terminator. */
452 size -= id_size;
453
454 for (i = 0; i < size; i += id_size) {
455 if (do_entry(mod->name, symval+i, alias)) {
456 /* Always end in a wildcard, for future extension */
457 if (alias[strlen(alias)-1] != '*')
458 strcat(alias, "*");
459 buf_printf(&mod->dev_table_buf,
460 "MODULE_ALIAS(\"%s\");\n", alias);
461 }
462 }
463}
464
465/* Create MODULE_ALIAS() statements.
466 * At this time, we cannot write the actual output C source yet,
467 * so we write into the mod->dev_table_buf buffer. */
468void handle_moddevtable(struct module *mod, struct elf_info *info,
469 Elf_Sym *sym, const char *symname)
470{
471 void *symval;
472
473 /* We're looking for a section relative symbol */
474 if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum)
475 return;
476
477 symval = (void *)info->hdr
478 + info->sechdrs[sym->st_shndx].sh_offset
479 + sym->st_value;
480
481 if (sym_is(symname, "__mod_pci_device_table"))
482 do_table(symval, sym->st_size, sizeof(struct pci_device_id),
483 do_pci_entry, mod);
484 else if (sym_is(symname, "__mod_usb_device_table"))
b19dcd93
RK		 485 /* special case to handle bcdDevice ranges */
486 do_usb_table(symval, sym->st_size, mod);
1da177e4
LT		 487 else if (sym_is(symname, "__mod_ieee1394_device_table"))
488 do_table(symval, sym->st_size, sizeof(struct ieee1394_device_id),
489 do_ieee1394_entry, mod);
490 else if (sym_is(symname, "__mod_ccw_device_table"))
491 do_table(symval, sym->st_size, sizeof(struct ccw_device_id),
492 do_ccw_entry, mod);
493 else if (sym_is(symname, "__mod_serio_device_table"))
494 do_table(symval, sym->st_size, sizeof(struct serio_device_id),
495 do_serio_entry, mod);
496 else if (sym_is(symname, "__mod_pnp_device_table"))
497 do_table(symval, sym->st_size, sizeof(struct pnp_device_id),
498 do_pnp_entry, mod);
499 else if (sym_is(symname, "__mod_pnp_card_device_table"))
500 do_table(symval, sym->st_size, sizeof(struct pnp_card_device_id),
501 do_pnp_card_entry, mod);
90829cfe
DB		 502 else if (sym_is(symname, "__mod_pcmcia_device_table"))
503 do_table(symval, sym->st_size, sizeof(struct pcmcia_device_id),
504 do_pcmcia_entry, mod);
5e655772
JM		 505 else if (sym_is(symname, "__mod_of_device_table"))
506 do_table(symval, sym->st_size, sizeof(struct of_device_id),
507 do_of_entry, mod);
fb120da6
SR		 508 else if (sym_is(symname, "__mod_vio_device_table"))
509 do_table(symval, sym->st_size, sizeof(struct vio_device_id),
510 do_vio_entry, mod);
a9d1b24d
GKH		 511 else if (sym_is(symname, "__mod_i2c_device_table"))
512 do_table(symval, sym->st_size, sizeof(struct i2c_device_id),
513 do_i2c_entry, mod);
1d8f430c
RR		 514 else if (sym_is(symname, "__mod_input_device_table"))
515 do_table(symval, sym->st_size, sizeof(struct input_device_id),
516 do_input_entry, mod);
1da177e4
LT		 517}
518
519/* Now add out buffered information to the generated C source */
520void add_moddevtable(struct buffer *buf, struct module *mod)
521{
522 buf_printf(buf, "\n");
523 buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
524 free(mod->dev_table_buf.p);
525}
Linux 6.x block layer and io_uring tree(s)