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++) = '0'; 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