1 /* Simple code to turn various tables in an ELF file into alias definitions. 2 * This deals with kernel datastructures where they should be 3 * dealt with: in the kernel source. 4 * 5 * Copyright 2002-2003 Rusty Russell, IBM Corporation 6 * 2003 Kai Germaschewski 7 * 8 * 9 * This software may be used and distributed according to the terms 10 * of the GNU General Public License, incorporated herein by reference. 11 */ 12 13 #include "modpost.h" 14 15 /* We use the ELF typedefs for kernel_ulong_t but bite the bullet and 16 * use either stdint.h or inttypes.h for the rest. */ 17 #if KERNEL_ELFCLASS == ELFCLASS32 18 typedef Elf32_Addr kernel_ulong_t; 19 #define BITS_PER_LONG 32 20 #else 21 typedef Elf64_Addr kernel_ulong_t; 22 #define BITS_PER_LONG 64 23 #endif 24 #ifdef __sun__ 25 #include <inttypes.h> 26 #else 27 #include <stdint.h> 28 #endif 29 30 #include <ctype.h> 31 32 typedef uint32_t __u32; 33 typedef uint16_t __u16; 34 typedef 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" 40 41 #define ADD(str, sep, cond, field) \ 42 do { \ 43 strcat(str, sep); \ 44 if (cond) \ 45 sprintf(str + strlen(str), \ 46 sizeof(field) == 1 ? "%02X" : \ 47 sizeof(field) == 2 ? "%04X" : \ 48 sizeof(field) == 4 ? "%08X" : "", \ 49 field); \ 50 else \ 51 sprintf(str + strlen(str), "*"); \ 52 } while(0) 53 54 unsigned int cross_build = 0; 55 /** 56 * Check that sizeof(device_id type) are consistent with size of section 57 * in .o file. If in-consistent then userspace and kernel does not agree 58 * on actual size which is a bug. 59 * Also verify that the final entry in the table is all zeros. 60 * Ignore both checks if build host differ from target host and size differs. 61 **/ 62 static void device_id_check(const char *modname, const char *device_id, 63 unsigned long size, unsigned long id_size, 64 void *symval) 65 { 66 int i; 67 68 if (size % id_size || size < id_size) { 69 if (cross_build != 0) 70 return; 71 fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo " 72 "of the size of section __mod_%s_device_table=%lu.\n" 73 "Fix definition of struct %s_device_id " 74 "in mod_devicetable.h\n", 75 modname, device_id, id_size, device_id, size, device_id); 76 } 77 /* Verify last one is a terminator */ 78 for (i = 0; i < id_size; i++ ) { 79 if (*(uint8_t*)(symval+size-id_size+i)) { 80 fprintf(stderr,"%s: struct %s_device_id is %lu bytes. " 81 "The last of %lu is:\n", 82 modname, device_id, id_size, size / id_size); 83 for (i = 0; i < id_size; i++ ) 84 fprintf(stderr,"0x%02x ", 85 *(uint8_t*)(symval+size-id_size+i) ); 86 fprintf(stderr,"\n"); 87 fatal("%s: struct %s_device_id is not terminated " 88 "with a NULL entry!\n", modname, device_id); 89 } 90 } 91 } 92 93 /* USB is special because the bcdDevice can be matched against a numeric range */ 94 /* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipN" */ 95 static void do_usb_entry(struct usb_device_id *id, 96 unsigned int bcdDevice_initial, int bcdDevice_initial_digits, 97 unsigned char range_lo, unsigned char range_hi, 98 struct module *mod) 99 { 100 char alias[500]; 101 strcpy(alias, "usb:"); 102 ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR, 103 id->idVendor); 104 ADD(alias, "p", id->match_flags&USB_DEVICE_ID_MATCH_PRODUCT, 105 id->idProduct); 106 107 strcat(alias, "d"); 108 if (bcdDevice_initial_digits) 109 sprintf(alias + strlen(alias), "%0*X", 110 bcdDevice_initial_digits, bcdDevice_initial); 111 if (range_lo == range_hi) 112 sprintf(alias + strlen(alias), "%u", range_lo); 113 else if (range_lo > 0 || range_hi < 9) 114 sprintf(alias + strlen(alias), "[%u-%u]", range_lo, range_hi); 115 if (bcdDevice_initial_digits < (sizeof(id->bcdDevice_lo) * 2 - 1)) 116 strcat(alias, "*"); 117 118 ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS, 119 id->bDeviceClass); 120 ADD(alias, "dsc", 121 id->match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS, 122 id->bDeviceSubClass); 123 ADD(alias, "dp", 124 id->match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL, 125 id->bDeviceProtocol); 126 ADD(alias, "ic", 127 id->match_flags&USB_DEVICE_ID_MATCH_INT_CLASS, 128 id->bInterfaceClass); 129 ADD(alias, "isc", 130 id->match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS, 131 id->bInterfaceSubClass); 132 ADD(alias, "ip", 133 id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL, 134 id->bInterfaceProtocol); 135 136 /* Always end in a wildcard, for future extension */ 137 if (alias[strlen(alias)-1] != '*') 138 strcat(alias, "*"); 139 buf_printf(&mod->dev_table_buf, 140 "MODULE_ALIAS(\"%s\");\n", alias); 141 } 142 143 static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod) 144 { 145 unsigned int devlo, devhi; 146 unsigned char chi, clo; 147 int ndigits; 148 149 id->match_flags = TO_NATIVE(id->match_flags); 150 id->idVendor = TO_NATIVE(id->idVendor); 151 id->idProduct = TO_NATIVE(id->idProduct); 152 153 devlo = id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO ? 154 TO_NATIVE(id->bcdDevice_lo) : 0x0U; 155 devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ? 156 TO_NATIVE(id->bcdDevice_hi) : ~0x0U; 157 158 /* 159 * Some modules (visor) have empty slots as placeholder for 160 * run-time specification that results in catch-all alias 161 */ 162 if (!(id->idVendor | id->idProduct | id->bDeviceClass | id->bInterfaceClass)) 163 return; 164 165 /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */ 166 for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) { 167 clo = devlo & 0xf; 168 chi = devhi & 0xf; 169 if (chi > 9) /* it's bcd not hex */ 170 chi = 9; 171 devlo >>= 4; 172 devhi >>= 4; 173 174 if (devlo == devhi || !ndigits) { 175 do_usb_entry(id, devlo, ndigits, clo, chi, mod); 176 break; 177 } 178 179 if (clo > 0) 180 do_usb_entry(id, devlo++, ndigits, clo, 9, mod); 181 182 if (chi < 9) 183 do_usb_entry(id, devhi--, ndigits, 0, chi, mod); 184 } 185 } 186 187 static void do_usb_table(void *symval, unsigned long size, 188 struct module *mod) 189 { 190 unsigned int i; 191 const unsigned long id_size = sizeof(struct usb_device_id); 192 193 device_id_check(mod->name, "usb", size, id_size, symval); 194 195 /* Leave last one: it's the terminator. */ 196 size -= id_size; 197 198 for (i = 0; i < size; i += id_size) 199 do_usb_entry_multi(symval + i, mod); 200 } 201 202 /* Looks like: ieee1394:venNmoNspNverN */ 203 static int do_ieee1394_entry(const char *filename, 204 struct ieee1394_device_id *id, char *alias) 205 { 206 id->match_flags = TO_NATIVE(id->match_flags); 207 id->vendor_id = TO_NATIVE(id->vendor_id); 208 id->model_id = TO_NATIVE(id->model_id); 209 id->specifier_id = TO_NATIVE(id->specifier_id); 210 id->version = TO_NATIVE(id->version); 211 212 strcpy(alias, "ieee1394:"); 213 ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID, 214 id->vendor_id); 215 ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID, 216 id->model_id); 217 ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID, 218 id->specifier_id); 219 ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION, 220 id->version); 221 222 return 1; 223 } 224 225 /* Looks like: pci:vNdNsvNsdNbcNscNiN. */ 226 static int do_pci_entry(const char *filename, 227 struct pci_device_id *id, char *alias) 228 { 229 /* Class field can be divided into these three. */ 230 unsigned char baseclass, subclass, interface, 231 baseclass_mask, subclass_mask, interface_mask; 232 233 id->vendor = TO_NATIVE(id->vendor); 234 id->device = TO_NATIVE(id->device); 235 id->subvendor = TO_NATIVE(id->subvendor); 236 id->subdevice = TO_NATIVE(id->subdevice); 237 id->class = TO_NATIVE(id->class); 238 id->class_mask = TO_NATIVE(id->class_mask); 239 240 strcpy(alias, "pci:"); 241 ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor); 242 ADD(alias, "d", id->device != PCI_ANY_ID, id->device); 243 ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor); 244 ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice); 245 246 baseclass = (id->class) >> 16; 247 baseclass_mask = (id->class_mask) >> 16; 248 subclass = (id->class) >> 8; 249 subclass_mask = (id->class_mask) >> 8; 250 interface = id->class; 251 interface_mask = id->class_mask; 252 253 if ((baseclass_mask != 0 && baseclass_mask != 0xFF) 254 || (subclass_mask != 0 && subclass_mask != 0xFF) 255 || (interface_mask != 0 && interface_mask != 0xFF)) { 256 warn("Can't handle masks in %s:%04X\n", 257 filename, id->class_mask); 258 return 0; 259 } 260 261 ADD(alias, "bc", baseclass_mask == 0xFF, baseclass); 262 ADD(alias, "sc", subclass_mask == 0xFF, subclass); 263 ADD(alias, "i", interface_mask == 0xFF, interface); 264 return 1; 265 } 266 267 /* looks like: "ccw:tNmNdtNdmN" */ 268 static int do_ccw_entry(const char *filename, 269 struct ccw_device_id *id, char *alias) 270 { 271 id->match_flags = TO_NATIVE(id->match_flags); 272 id->cu_type = TO_NATIVE(id->cu_type); 273 id->cu_model = TO_NATIVE(id->cu_model); 274 id->dev_type = TO_NATIVE(id->dev_type); 275 id->dev_model = TO_NATIVE(id->dev_model); 276 277 strcpy(alias, "ccw:"); 278 ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE, 279 id->cu_type); 280 ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL, 281 id->cu_model); 282 ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE, 283 id->dev_type); 284 ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL, 285 id->dev_model); 286 return 1; 287 } 288 289 /* looks like: "ap:tN" */ 290 static int do_ap_entry(const char *filename, 291 struct ap_device_id *id, char *alias) 292 { 293 sprintf(alias, "ap:t%02X", id->dev_type); 294 return 1; 295 } 296 297 /* Looks like: "serio:tyNprNidNexN" */ 298 static int do_serio_entry(const char *filename, 299 struct serio_device_id *id, char *alias) 300 { 301 id->type = TO_NATIVE(id->type); 302 id->proto = TO_NATIVE(id->proto); 303 id->id = TO_NATIVE(id->id); 304 id->extra = TO_NATIVE(id->extra); 305 306 strcpy(alias, "serio:"); 307 ADD(alias, "ty", id->type != SERIO_ANY, id->type); 308 ADD(alias, "pr", id->proto != SERIO_ANY, id->proto); 309 ADD(alias, "id", id->id != SERIO_ANY, id->id); 310 ADD(alias, "ex", id->extra != SERIO_ANY, id->extra); 311 312 return 1; 313 } 314 315 /* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */ 316 static int do_acpi_entry(const char *filename, 317 struct acpi_device_id *id, char *alias) 318 { 319 sprintf(alias, "acpi*:%s:", id->id); 320 return 1; 321 } 322 323 /* looks like: "pnp:dD" */ 324 static int do_pnp_entry(const char *filename, 325 struct pnp_device_id *id, char *alias) 326 { 327 sprintf(alias, "pnp:d%s", id->id); 328 return 1; 329 } 330 331 /* looks like: "pnp:dD" for every device of the card */ 332 static void do_pnp_card_entries(void *symval, unsigned long size, 333 struct module *mod) 334 { 335 const unsigned long id_size = sizeof(struct pnp_card_device_id); 336 const unsigned int count = (size / id_size)-1; 337 const struct pnp_card_device_id *cards = symval; 338 unsigned int i; 339 340 device_id_check(mod->name, "pnp", size, id_size, symval); 341 342 for (i = 0; i < count; i++) { 343 unsigned int j; 344 const struct pnp_card_device_id *card = &cards[i]; 345 346 for (j = 0; j < PNP_MAX_DEVICES; j++) { 347 const char *id = (char *)card->devs[j].id; 348 int i2, j2; 349 int dup = 0; 350 351 if (!id[0]) 352 break; 353 354 /* find duplicate, already added value */ 355 for (i2 = 0; i2 < i && !dup; i2++) { 356 const struct pnp_card_device_id *card2 = &cards[i2]; 357 358 for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) { 359 const char *id2 = (char *)card2->devs[j2].id; 360 361 if (!id2[0]) 362 break; 363 364 if (!strcmp(id, id2)) { 365 dup = 1; 366 break; 367 } 368 } 369 } 370 371 /* add an individual alias for every device entry */ 372 if (!dup) 373 buf_printf(&mod->dev_table_buf, 374 "MODULE_ALIAS(\"pnp:d%s*\");\n", id); 375 } 376 } 377 } 378 379 /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */ 380 static int do_pcmcia_entry(const char *filename, 381 struct pcmcia_device_id *id, char *alias) 382 { 383 unsigned int i; 384 385 id->match_flags = TO_NATIVE(id->match_flags); 386 id->manf_id = TO_NATIVE(id->manf_id); 387 id->card_id = TO_NATIVE(id->card_id); 388 id->func_id = TO_NATIVE(id->func_id); 389 id->function = TO_NATIVE(id->function); 390 id->device_no = TO_NATIVE(id->device_no); 391 392 for (i=0; i<4; i++) { 393 id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]); 394 } 395 396 strcpy(alias, "pcmcia:"); 397 ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID, 398 id->manf_id); 399 ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID, 400 id->card_id); 401 ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID, 402 id->func_id); 403 ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION, 404 id->function); 405 ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO, 406 id->device_no); 407 ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]); 408 ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]); 409 ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]); 410 ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]); 411 412 return 1; 413 } 414 415 416 417 static int do_of_entry (const char *filename, struct of_device_id *of, char *alias) 418 { 419 int len; 420 char *tmp; 421 len = sprintf (alias, "of:N%sT%s", 422 of->name[0] ? of->name : "*", 423 of->type[0] ? of->type : "*"); 424 425 if (of->compatible[0]) 426 sprintf (&alias[len], "%sC%s", 427 of->type[0] ? "*" : "", 428 of->compatible); 429 430 /* Replace all whitespace with underscores */ 431 for (tmp = alias; tmp && *tmp; tmp++) 432 if (isspace (*tmp)) 433 *tmp = '_'; 434 435 return 1; 436 } 437 438 static int do_vio_entry(const char *filename, struct vio_device_id *vio, 439 char *alias) 440 { 441 char *tmp; 442 443 sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*", 444 vio->compat[0] ? vio->compat : "*"); 445 446 /* Replace all whitespace with underscores */ 447 for (tmp = alias; tmp && *tmp; tmp++) 448 if (isspace (*tmp)) 449 *tmp = '_'; 450 451 return 1; 452 } 453 454 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 455 456 static void do_input(char *alias, 457 kernel_ulong_t *arr, unsigned int min, unsigned int max) 458 { 459 unsigned int i; 460 461 for (i = min; i < max; i++) 462 if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG))) 463 sprintf(alias + strlen(alias), "%X,*", i); 464 } 465 466 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */ 467 static int do_input_entry(const char *filename, struct input_device_id *id, 468 char *alias) 469 { 470 sprintf(alias, "input:"); 471 472 ADD(alias, "b", id->flags & INPUT_DEVICE_ID_MATCH_BUS, id->bustype); 473 ADD(alias, "v", id->flags & INPUT_DEVICE_ID_MATCH_VENDOR, id->vendor); 474 ADD(alias, "p", id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT, id->product); 475 ADD(alias, "e", id->flags & INPUT_DEVICE_ID_MATCH_VERSION, id->version); 476 477 sprintf(alias + strlen(alias), "-e*"); 478 if (id->flags & INPUT_DEVICE_ID_MATCH_EVBIT) 479 do_input(alias, id->evbit, 0, INPUT_DEVICE_ID_EV_MAX); 480 sprintf(alias + strlen(alias), "k*"); 481 if (id->flags & INPUT_DEVICE_ID_MATCH_KEYBIT) 482 do_input(alias, id->keybit, 483 INPUT_DEVICE_ID_KEY_MIN_INTERESTING, 484 INPUT_DEVICE_ID_KEY_MAX); 485 sprintf(alias + strlen(alias), "r*"); 486 if (id->flags & INPUT_DEVICE_ID_MATCH_RELBIT) 487 do_input(alias, id->relbit, 0, INPUT_DEVICE_ID_REL_MAX); 488 sprintf(alias + strlen(alias), "a*"); 489 if (id->flags & INPUT_DEVICE_ID_MATCH_ABSBIT) 490 do_input(alias, id->absbit, 0, INPUT_DEVICE_ID_ABS_MAX); 491 sprintf(alias + strlen(alias), "m*"); 492 if (id->flags & INPUT_DEVICE_ID_MATCH_MSCIT) 493 do_input(alias, id->mscbit, 0, INPUT_DEVICE_ID_MSC_MAX); 494 sprintf(alias + strlen(alias), "l*"); 495 if (id->flags & INPUT_DEVICE_ID_MATCH_LEDBIT) 496 do_input(alias, id->ledbit, 0, INPUT_DEVICE_ID_LED_MAX); 497 sprintf(alias + strlen(alias), "s*"); 498 if (id->flags & INPUT_DEVICE_ID_MATCH_SNDBIT) 499 do_input(alias, id->sndbit, 0, INPUT_DEVICE_ID_SND_MAX); 500 sprintf(alias + strlen(alias), "f*"); 501 if (id->flags & INPUT_DEVICE_ID_MATCH_FFBIT) 502 do_input(alias, id->ffbit, 0, INPUT_DEVICE_ID_FF_MAX); 503 sprintf(alias + strlen(alias), "w*"); 504 if (id->flags & INPUT_DEVICE_ID_MATCH_SWBIT) 505 do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX); 506 return 1; 507 } 508 509 static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa, 510 char *alias) 511 { 512 if (eisa->sig[0]) 513 sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", eisa->sig); 514 return 1; 515 } 516 517 /* Looks like: parisc:tNhvNrevNsvN */ 518 static int do_parisc_entry(const char *filename, struct parisc_device_id *id, 519 char *alias) 520 { 521 id->hw_type = TO_NATIVE(id->hw_type); 522 id->hversion = TO_NATIVE(id->hversion); 523 id->hversion_rev = TO_NATIVE(id->hversion_rev); 524 id->sversion = TO_NATIVE(id->sversion); 525 526 strcpy(alias, "parisc:"); 527 ADD(alias, "t", id->hw_type != PA_HWTYPE_ANY_ID, id->hw_type); 528 ADD(alias, "hv", id->hversion != PA_HVERSION_ANY_ID, id->hversion); 529 ADD(alias, "rev", id->hversion_rev != PA_HVERSION_REV_ANY_ID, id->hversion_rev); 530 ADD(alias, "sv", id->sversion != PA_SVERSION_ANY_ID, id->sversion); 531 532 return 1; 533 } 534 535 /* Looks like: sdio:cNvNdN. */ 536 static int do_sdio_entry(const char *filename, 537 struct sdio_device_id *id, char *alias) 538 { 539 id->class = TO_NATIVE(id->class); 540 id->vendor = TO_NATIVE(id->vendor); 541 id->device = TO_NATIVE(id->device); 542 543 strcpy(alias, "sdio:"); 544 ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class); 545 ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor); 546 ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device); 547 return 1; 548 } 549 550 /* Looks like: ssb:vNidNrevN. */ 551 static int do_ssb_entry(const char *filename, 552 struct ssb_device_id *id, char *alias) 553 { 554 id->vendor = TO_NATIVE(id->vendor); 555 id->coreid = TO_NATIVE(id->coreid); 556 id->revision = TO_NATIVE(id->revision); 557 558 strcpy(alias, "ssb:"); 559 ADD(alias, "v", id->vendor != SSB_ANY_VENDOR, id->vendor); 560 ADD(alias, "id", id->coreid != SSB_ANY_ID, id->coreid); 561 ADD(alias, "rev", id->revision != SSB_ANY_REV, id->revision); 562 return 1; 563 } 564 565 /* Looks like: virtio:dNvN */ 566 static int do_virtio_entry(const char *filename, struct virtio_device_id *id, 567 char *alias) 568 { 569 id->device = TO_NATIVE(id->device); 570 id->vendor = TO_NATIVE(id->vendor); 571 572 strcpy(alias, "virtio:"); 573 ADD(alias, "d", 1, id->device); 574 ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor); 575 576 return 1; 577 } 578 579 /* Looks like: i2c:S */ 580 static int do_i2c_entry(const char *filename, struct i2c_device_id *id, 581 char *alias) 582 { 583 sprintf(alias, I2C_MODULE_PREFIX "%s", id->name); 584 585 return 1; 586 } 587 588 /* Ignore any prefix, eg. v850 prepends _ */ 589 static inline int sym_is(const char *symbol, const char *name) 590 { 591 const char *match; 592 593 match = strstr(symbol, name); 594 if (!match) 595 return 0; 596 return match[strlen(symbol)] == '\0'; 597 } 598 599 static void do_table(void *symval, unsigned long size, 600 unsigned long id_size, 601 const char *device_id, 602 void *function, 603 struct module *mod) 604 { 605 unsigned int i; 606 char alias[500]; 607 int (*do_entry)(const char *, void *entry, char *alias) = function; 608 609 device_id_check(mod->name, device_id, size, id_size, symval); 610 /* Leave last one: it's the terminator. */ 611 size -= id_size; 612 613 for (i = 0; i < size; i += id_size) { 614 if (do_entry(mod->name, symval+i, alias)) { 615 /* Always end in a wildcard, for future extension */ 616 if (alias[strlen(alias)-1] != '*') 617 strcat(alias, "*"); 618 buf_printf(&mod->dev_table_buf, 619 "MODULE_ALIAS(\"%s\");\n", alias); 620 } 621 } 622 } 623 624 /* Create MODULE_ALIAS() statements. 625 * At this time, we cannot write the actual output C source yet, 626 * so we write into the mod->dev_table_buf buffer. */ 627 void handle_moddevtable(struct module *mod, struct elf_info *info, 628 Elf_Sym *sym, const char *symname) 629 { 630 void *symval; 631 char *zeros = NULL; 632 633 /* We're looking for a section relative symbol */ 634 if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum) 635 return; 636 637 /* Handle all-NULL symbols allocated into .bss */ 638 if (info->sechdrs[sym->st_shndx].sh_type & SHT_NOBITS) { 639 zeros = calloc(1, sym->st_size); 640 symval = zeros; 641 } else { 642 symval = (void *)info->hdr 643 + info->sechdrs[sym->st_shndx].sh_offset 644 + sym->st_value; 645 } 646 647 if (sym_is(symname, "__mod_pci_device_table")) 648 do_table(symval, sym->st_size, 649 sizeof(struct pci_device_id), "pci", 650 do_pci_entry, mod); 651 else if (sym_is(symname, "__mod_usb_device_table")) 652 /* special case to handle bcdDevice ranges */ 653 do_usb_table(symval, sym->st_size, mod); 654 else if (sym_is(symname, "__mod_ieee1394_device_table")) 655 do_table(symval, sym->st_size, 656 sizeof(struct ieee1394_device_id), "ieee1394", 657 do_ieee1394_entry, mod); 658 else if (sym_is(symname, "__mod_ccw_device_table")) 659 do_table(symval, sym->st_size, 660 sizeof(struct ccw_device_id), "ccw", 661 do_ccw_entry, mod); 662 else if (sym_is(symname, "__mod_ap_device_table")) 663 do_table(symval, sym->st_size, 664 sizeof(struct ap_device_id), "ap", 665 do_ap_entry, mod); 666 else if (sym_is(symname, "__mod_serio_device_table")) 667 do_table(symval, sym->st_size, 668 sizeof(struct serio_device_id), "serio", 669 do_serio_entry, mod); 670 else if (sym_is(symname, "__mod_acpi_device_table")) 671 do_table(symval, sym->st_size, 672 sizeof(struct acpi_device_id), "acpi", 673 do_acpi_entry, mod); 674 else if (sym_is(symname, "__mod_pnp_device_table")) 675 do_table(symval, sym->st_size, 676 sizeof(struct pnp_device_id), "pnp", 677 do_pnp_entry, mod); 678 else if (sym_is(symname, "__mod_pnp_card_device_table")) 679 do_pnp_card_entries(symval, sym->st_size, mod); 680 else if (sym_is(symname, "__mod_pcmcia_device_table")) 681 do_table(symval, sym->st_size, 682 sizeof(struct pcmcia_device_id), "pcmcia", 683 do_pcmcia_entry, mod); 684 else if (sym_is(symname, "__mod_of_device_table")) 685 do_table(symval, sym->st_size, 686 sizeof(struct of_device_id), "of", 687 do_of_entry, mod); 688 else if (sym_is(symname, "__mod_vio_device_table")) 689 do_table(symval, sym->st_size, 690 sizeof(struct vio_device_id), "vio", 691 do_vio_entry, mod); 692 else if (sym_is(symname, "__mod_input_device_table")) 693 do_table(symval, sym->st_size, 694 sizeof(struct input_device_id), "input", 695 do_input_entry, mod); 696 else if (sym_is(symname, "__mod_eisa_device_table")) 697 do_table(symval, sym->st_size, 698 sizeof(struct eisa_device_id), "eisa", 699 do_eisa_entry, mod); 700 else if (sym_is(symname, "__mod_parisc_device_table")) 701 do_table(symval, sym->st_size, 702 sizeof(struct parisc_device_id), "parisc", 703 do_parisc_entry, mod); 704 else if (sym_is(symname, "__mod_sdio_device_table")) 705 do_table(symval, sym->st_size, 706 sizeof(struct sdio_device_id), "sdio", 707 do_sdio_entry, mod); 708 else if (sym_is(symname, "__mod_ssb_device_table")) 709 do_table(symval, sym->st_size, 710 sizeof(struct ssb_device_id), "ssb", 711 do_ssb_entry, mod); 712 else if (sym_is(symname, "__mod_virtio_device_table")) 713 do_table(symval, sym->st_size, 714 sizeof(struct virtio_device_id), "virtio", 715 do_virtio_entry, mod); 716 else if (sym_is(symname, "__mod_i2c_device_table")) 717 do_table(symval, sym->st_size, 718 sizeof(struct i2c_device_id), "i2c", 719 do_i2c_entry, mod); 720 free(zeros); 721 } 722 723 /* Now add out buffered information to the generated C source */ 724 void add_moddevtable(struct buffer *buf, struct module *mod) 725 { 726 buf_printf(buf, "\n"); 727 buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos); 728 free(mod->dev_table_buf.p); 729 } 730