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