xref: /openbmc/linux/scripts/mod/file2alias.c (revision 9144f784f852f9a125cabe9927b986d909bfa439)
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  /* UUID types for backward compatibility, don't use in new code */
39  typedef struct {
40  	__u8 b[16];
41  } guid_t;
42  
43  typedef struct {
44  	__u8 b[16];
45  } uuid_t;
46  
47  #define	UUID_STRING_LEN		36
48  
49  /* MEI UUID type, don't use anywhere else */
50  typedef struct {
51  	__u8 b[16];
52  } uuid_le;
53  
54  /* Big exception to the "don't include kernel headers into userspace, which
55   * even potentially has different endianness and word sizes, since
56   * we handle those differences explicitly below */
57  #include "../../include/linux/mod_devicetable.h"
58  
59  /* This array collects all instances that use the generic do_table */
60  struct devtable {
61  	const char *device_id; /* name of table, __mod_<name>__*_device_table. */
62  	unsigned long id_size;
63  	int (*do_entry)(const char *filename, void *symval, char *alias);
64  };
65  
66  /* Size of alias provided to do_entry functions */
67  #define ALIAS_SIZE 500
68  
69  /* Define a variable f that holds the value of field f of struct devid
70   * based at address m.
71   */
72  #define DEF_FIELD(m, devid, f) \
73  	typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))
74  
75  /* Define a variable v that holds the address of field f of struct devid
76   * based at address m.  Due to the way typeof works, for a field of type
77   * T[N] the variable has type T(*)[N], _not_ T*.
78   */
79  #define DEF_FIELD_ADDR_VAR(m, devid, f, v) \
80  	typeof(((struct devid *)0)->f) *v = ((m) + OFF_##devid##_##f)
81  
82  /* Define a variable f that holds the address of field f of struct devid
83   * based at address m.  Due to the way typeof works, for a field of type
84   * T[N] the variable has type T(*)[N], _not_ T*.
85   */
86  #define DEF_FIELD_ADDR(m, devid, f) \
87  	DEF_FIELD_ADDR_VAR(m, devid, f, f)
88  
89  #define ADD(str, sep, cond, field)                              \
90  do {                                                            \
91          strcat(str, sep);                                       \
92          if (cond)                                               \
93                  sprintf(str + strlen(str),                      \
94                          sizeof(field) == 1 ? "%02X" :           \
95                          sizeof(field) == 2 ? "%04X" :           \
96                          sizeof(field) == 4 ? "%08X" : "",       \
97                          field);                                 \
98          else                                                    \
99                  sprintf(str + strlen(str), "*");                \
100  } while(0)
101  
102  /* End in a wildcard, for future extension */
add_wildcard(char * str)103  static inline void add_wildcard(char *str)
104  {
105  	int len = strlen(str);
106  
107  	if (str[len - 1] != '*')
108  		strcat(str + len, "*");
109  }
110  
add_uuid(char * str,uuid_le uuid)111  static inline void add_uuid(char *str, uuid_le uuid)
112  {
113  	int len = strlen(str);
114  
115  	sprintf(str + len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
116  		uuid.b[3], uuid.b[2], uuid.b[1], uuid.b[0],
117  		uuid.b[5], uuid.b[4], uuid.b[7], uuid.b[6],
118  		uuid.b[8], uuid.b[9], uuid.b[10], uuid.b[11],
119  		uuid.b[12], uuid.b[13], uuid.b[14], uuid.b[15]);
120  }
121  
add_guid(char * str,guid_t guid)122  static inline void add_guid(char *str, guid_t guid)
123  {
124  	int len = strlen(str);
125  
126  	sprintf(str + len, "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
127  		guid.b[3], guid.b[2], guid.b[1], guid.b[0],
128  		guid.b[5], guid.b[4], guid.b[7], guid.b[6],
129  		guid.b[8], guid.b[9], guid.b[10], guid.b[11],
130  		guid.b[12], guid.b[13], guid.b[14], guid.b[15]);
131  }
132  
133  /**
134   * Check that sizeof(device_id type) are consistent with size of section
135   * in .o file. If in-consistent then userspace and kernel does not agree
136   * on actual size which is a bug.
137   * Also verify that the final entry in the table is all zeros.
138   * Ignore both checks if build host differ from target host and size differs.
139   **/
device_id_check(const char * modname,const char * device_id,unsigned long size,unsigned long id_size,void * symval)140  static void device_id_check(const char *modname, const char *device_id,
141  			    unsigned long size, unsigned long id_size,
142  			    void *symval)
143  {
144  	int i;
145  
146  	if (size % id_size || size < id_size) {
147  		fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo of the size of section __mod_%s__<identifier>_device_table=%lu.\n"
148  		      "Fix definition of struct %s_device_id in mod_devicetable.h\n",
149  		      modname, device_id, id_size, device_id, size, device_id);
150  	}
151  	/* Verify last one is a terminator */
152  	for (i = 0; i < id_size; i++ ) {
153  		if (*(uint8_t*)(symval+size-id_size+i)) {
154  			fprintf(stderr,
155  				"%s: struct %s_device_id is %lu bytes.  The last of %lu is:\n",
156  				modname, device_id, id_size, size / id_size);
157  			for (i = 0; i < id_size; i++ )
158  				fprintf(stderr,"0x%02x ",
159  					*(uint8_t*)(symval+size-id_size+i) );
160  			fprintf(stderr,"\n");
161  			fatal("%s: struct %s_device_id is not terminated with a NULL entry!\n",
162  			      modname, device_id);
163  		}
164  	}
165  }
166  
167  /* USB is special because the bcdDevice can be matched against a numeric range */
168  /* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */
do_usb_entry(void * symval,unsigned int bcdDevice_initial,int bcdDevice_initial_digits,unsigned char range_lo,unsigned char range_hi,unsigned char max,struct module * mod)169  static void do_usb_entry(void *symval,
170  			 unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
171  			 unsigned char range_lo, unsigned char range_hi,
172  			 unsigned char max, struct module *mod)
173  {
174  	char alias[500];
175  	DEF_FIELD(symval, usb_device_id, match_flags);
176  	DEF_FIELD(symval, usb_device_id, idVendor);
177  	DEF_FIELD(symval, usb_device_id, idProduct);
178  	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
179  	DEF_FIELD(symval, usb_device_id, bDeviceClass);
180  	DEF_FIELD(symval, usb_device_id, bDeviceSubClass);
181  	DEF_FIELD(symval, usb_device_id, bDeviceProtocol);
182  	DEF_FIELD(symval, usb_device_id, bInterfaceClass);
183  	DEF_FIELD(symval, usb_device_id, bInterfaceSubClass);
184  	DEF_FIELD(symval, usb_device_id, bInterfaceProtocol);
185  	DEF_FIELD(symval, usb_device_id, bInterfaceNumber);
186  
187  	strcpy(alias, "usb:");
188  	ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR,
189  	    idVendor);
190  	ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
191  	    idProduct);
192  
193  	strcat(alias, "d");
194  	if (bcdDevice_initial_digits)
195  		sprintf(alias + strlen(alias), "%0*X",
196  			bcdDevice_initial_digits, bcdDevice_initial);
197  	if (range_lo == range_hi)
198  		sprintf(alias + strlen(alias), "%X", range_lo);
199  	else if (range_lo > 0 || range_hi < max) {
200  		if (range_lo > 0x9 || range_hi < 0xA)
201  			sprintf(alias + strlen(alias),
202  				"[%X-%X]",
203  				range_lo,
204  				range_hi);
205  		else {
206  			sprintf(alias + strlen(alias),
207  				range_lo < 0x9 ? "[%X-9" : "[%X",
208  				range_lo);
209  			sprintf(alias + strlen(alias),
210  				range_hi > 0xA ? "A-%X]" : "%X]",
211  				range_hi);
212  		}
213  	}
214  	if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1))
215  		strcat(alias, "*");
216  
217  	ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
218  	    bDeviceClass);
219  	ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
220  	    bDeviceSubClass);
221  	ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
222  	    bDeviceProtocol);
223  	ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
224  	    bInterfaceClass);
225  	ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
226  	    bInterfaceSubClass);
227  	ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
228  	    bInterfaceProtocol);
229  	ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
230  	    bInterfaceNumber);
231  
232  	add_wildcard(alias);
233  	buf_printf(&mod->dev_table_buf,
234  		   "MODULE_ALIAS(\"%s\");\n", alias);
235  }
236  
237  /* Handles increment/decrement of BCD formatted integers */
238  /* Returns the previous value, so it works like i++ or i-- */
incbcd(unsigned int * bcd,int inc,unsigned char max,size_t chars)239  static unsigned int incbcd(unsigned int *bcd,
240  			   int inc,
241  			   unsigned char max,
242  			   size_t chars)
243  {
244  	unsigned int init = *bcd, i, j;
245  	unsigned long long c, dec = 0;
246  
247  	/* If bcd is not in BCD format, just increment */
248  	if (max > 0x9) {
249  		*bcd += inc;
250  		return init;
251  	}
252  
253  	/* Convert BCD to Decimal */
254  	for (i=0 ; i < chars ; i++) {
255  		c = (*bcd >> (i << 2)) & 0xf;
256  		c = c > 9 ? 9 : c; /* force to bcd just in case */
257  		for (j=0 ; j < i ; j++)
258  			c = c * 10;
259  		dec += c;
260  	}
261  
262  	/* Do our increment/decrement */
263  	dec += inc;
264  	*bcd  = 0;
265  
266  	/* Convert back to BCD */
267  	for (i=0 ; i < chars ; i++) {
268  		for (c=1,j=0 ; j < i ; j++)
269  			c = c * 10;
270  		c = (dec / c) % 10;
271  		*bcd += c << (i << 2);
272  	}
273  	return init;
274  }
275  
do_usb_entry_multi(void * symval,struct module * mod)276  static void do_usb_entry_multi(void *symval, struct module *mod)
277  {
278  	unsigned int devlo, devhi;
279  	unsigned char chi, clo, max;
280  	int ndigits;
281  
282  	DEF_FIELD(symval, usb_device_id, match_flags);
283  	DEF_FIELD(symval, usb_device_id, idVendor);
284  	DEF_FIELD(symval, usb_device_id, idProduct);
285  	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
286  	DEF_FIELD(symval, usb_device_id, bcdDevice_hi);
287  	DEF_FIELD(symval, usb_device_id, bDeviceClass);
288  	DEF_FIELD(symval, usb_device_id, bInterfaceClass);
289  
290  	devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
291  		bcdDevice_lo : 0x0U;
292  	devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
293  		bcdDevice_hi : ~0x0U;
294  
295  	/* Figure out if this entry is in bcd or hex format */
296  	max = 0x9; /* Default to decimal format */
297  	for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) {
298  		clo = (devlo >> (ndigits << 2)) & 0xf;
299  		chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
300  		if (clo > max || chi > max) {
301  			max = 0xf;
302  			break;
303  		}
304  	}
305  
306  	/*
307  	 * Some modules (visor) have empty slots as placeholder for
308  	 * run-time specification that results in catch-all alias
309  	 */
310  	if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass))
311  		return;
312  
313  	/* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
314  	for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
315  		clo = devlo & 0xf;
316  		chi = devhi & 0xf;
317  		if (chi > max)	/* If we are in bcd mode, truncate if necessary */
318  			chi = max;
319  		devlo >>= 4;
320  		devhi >>= 4;
321  
322  		if (devlo == devhi || !ndigits) {
323  			do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod);
324  			break;
325  		}
326  
327  		if (clo > 0x0)
328  			do_usb_entry(symval,
329  				     incbcd(&devlo, 1, max,
330  					    sizeof(bcdDevice_lo) * 2),
331  				     ndigits, clo, max, max, mod);
332  
333  		if (chi < max)
334  			do_usb_entry(symval,
335  				     incbcd(&devhi, -1, max,
336  					    sizeof(bcdDevice_lo) * 2),
337  				     ndigits, 0x0, chi, max, mod);
338  	}
339  }
340  
do_usb_table(void * symval,unsigned long size,struct module * mod)341  static void do_usb_table(void *symval, unsigned long size,
342  			 struct module *mod)
343  {
344  	unsigned int i;
345  	const unsigned long id_size = SIZE_usb_device_id;
346  
347  	device_id_check(mod->name, "usb", size, id_size, symval);
348  
349  	/* Leave last one: it's the terminator. */
350  	size -= id_size;
351  
352  	for (i = 0; i < size; i += id_size)
353  		do_usb_entry_multi(symval + i, mod);
354  }
355  
do_of_entry_multi(void * symval,struct module * mod)356  static void do_of_entry_multi(void *symval, struct module *mod)
357  {
358  	char alias[500];
359  	int len;
360  	char *tmp;
361  
362  	DEF_FIELD_ADDR(symval, of_device_id, name);
363  	DEF_FIELD_ADDR(symval, of_device_id, type);
364  	DEF_FIELD_ADDR(symval, of_device_id, compatible);
365  
366  	len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*",
367  		      (*type)[0] ? *type : "*");
368  
369  	if ((*compatible)[0])
370  		sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "",
371  			*compatible);
372  
373  	/* Replace all whitespace with underscores */
374  	for (tmp = alias; tmp && *tmp; tmp++)
375  		if (isspace(*tmp))
376  			*tmp = '_';
377  
378  	buf_printf(&mod->dev_table_buf, "MODULE_ALIAS(\"%s\");\n", alias);
379  	strcat(alias, "C");
380  	add_wildcard(alias);
381  	buf_printf(&mod->dev_table_buf, "MODULE_ALIAS(\"%s\");\n", alias);
382  }
383  
do_of_table(void * symval,unsigned long size,struct module * mod)384  static void do_of_table(void *symval, unsigned long size,
385  			struct module *mod)
386  {
387  	unsigned int i;
388  	const unsigned long id_size = SIZE_of_device_id;
389  
390  	device_id_check(mod->name, "of", size, id_size, symval);
391  
392  	/* Leave last one: it's the terminator. */
393  	size -= id_size;
394  
395  	for (i = 0; i < size; i += id_size)
396  		do_of_entry_multi(symval + i, mod);
397  }
398  
399  /* Looks like: hid:bNvNpN */
do_hid_entry(const char * filename,void * symval,char * alias)400  static int do_hid_entry(const char *filename,
401  			     void *symval, char *alias)
402  {
403  	DEF_FIELD(symval, hid_device_id, bus);
404  	DEF_FIELD(symval, hid_device_id, group);
405  	DEF_FIELD(symval, hid_device_id, vendor);
406  	DEF_FIELD(symval, hid_device_id, product);
407  
408  	sprintf(alias, "hid:");
409  	ADD(alias, "b", bus != HID_BUS_ANY, bus);
410  	ADD(alias, "g", group != HID_GROUP_ANY, group);
411  	ADD(alias, "v", vendor != HID_ANY_ID, vendor);
412  	ADD(alias, "p", product != HID_ANY_ID, product);
413  
414  	return 1;
415  }
416  
417  /* Looks like: ieee1394:venNmoNspNverN */
do_ieee1394_entry(const char * filename,void * symval,char * alias)418  static int do_ieee1394_entry(const char *filename,
419  			     void *symval, char *alias)
420  {
421  	DEF_FIELD(symval, ieee1394_device_id, match_flags);
422  	DEF_FIELD(symval, ieee1394_device_id, vendor_id);
423  	DEF_FIELD(symval, ieee1394_device_id, model_id);
424  	DEF_FIELD(symval, ieee1394_device_id, specifier_id);
425  	DEF_FIELD(symval, ieee1394_device_id, version);
426  
427  	strcpy(alias, "ieee1394:");
428  	ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID,
429  	    vendor_id);
430  	ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID,
431  	    model_id);
432  	ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID,
433  	    specifier_id);
434  	ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION,
435  	    version);
436  
437  	add_wildcard(alias);
438  	return 1;
439  }
440  
441  /* Looks like: pci:vNdNsvNsdNbcNscNiN or <prefix>_pci:vNdNsvNsdNbcNscNiN. */
do_pci_entry(const char * filename,void * symval,char * alias)442  static int do_pci_entry(const char *filename,
443  			void *symval, char *alias)
444  {
445  	/* Class field can be divided into these three. */
446  	unsigned char baseclass, subclass, interface,
447  		baseclass_mask, subclass_mask, interface_mask;
448  
449  	DEF_FIELD(symval, pci_device_id, vendor);
450  	DEF_FIELD(symval, pci_device_id, device);
451  	DEF_FIELD(symval, pci_device_id, subvendor);
452  	DEF_FIELD(symval, pci_device_id, subdevice);
453  	DEF_FIELD(symval, pci_device_id, class);
454  	DEF_FIELD(symval, pci_device_id, class_mask);
455  	DEF_FIELD(symval, pci_device_id, override_only);
456  
457  	switch (override_only) {
458  	case 0:
459  		strcpy(alias, "pci:");
460  		break;
461  	case PCI_ID_F_VFIO_DRIVER_OVERRIDE:
462  		strcpy(alias, "vfio_pci:");
463  		break;
464  	default:
465  		warn("Unknown PCI driver_override alias %08X\n",
466  		     override_only);
467  		return 0;
468  	}
469  
470  	ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
471  	ADD(alias, "d", device != PCI_ANY_ID, device);
472  	ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
473  	ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);
474  
475  	baseclass = (class) >> 16;
476  	baseclass_mask = (class_mask) >> 16;
477  	subclass = (class) >> 8;
478  	subclass_mask = (class_mask) >> 8;
479  	interface = class;
480  	interface_mask = class_mask;
481  
482  	if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
483  	    || (subclass_mask != 0 && subclass_mask != 0xFF)
484  	    || (interface_mask != 0 && interface_mask != 0xFF)) {
485  		warn("Can't handle masks in %s:%04X\n",
486  		     filename, class_mask);
487  		return 0;
488  	}
489  
490  	ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
491  	ADD(alias, "sc", subclass_mask == 0xFF, subclass);
492  	ADD(alias, "i", interface_mask == 0xFF, interface);
493  	add_wildcard(alias);
494  	return 1;
495  }
496  
497  /* looks like: "ccw:tNmNdtNdmN" */
do_ccw_entry(const char * filename,void * symval,char * alias)498  static int do_ccw_entry(const char *filename,
499  			void *symval, char *alias)
500  {
501  	DEF_FIELD(symval, ccw_device_id, match_flags);
502  	DEF_FIELD(symval, ccw_device_id, cu_type);
503  	DEF_FIELD(symval, ccw_device_id, cu_model);
504  	DEF_FIELD(symval, ccw_device_id, dev_type);
505  	DEF_FIELD(symval, ccw_device_id, dev_model);
506  
507  	strcpy(alias, "ccw:");
508  	ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
509  	    cu_type);
510  	ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
511  	    cu_model);
512  	ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
513  	    dev_type);
514  	ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
515  	    dev_model);
516  	add_wildcard(alias);
517  	return 1;
518  }
519  
520  /* looks like: "ap:tN" */
do_ap_entry(const char * filename,void * symval,char * alias)521  static int do_ap_entry(const char *filename,
522  		       void *symval, char *alias)
523  {
524  	DEF_FIELD(symval, ap_device_id, dev_type);
525  
526  	sprintf(alias, "ap:t%02X*", dev_type);
527  	return 1;
528  }
529  
530  /* looks like: "css:tN" */
do_css_entry(const char * filename,void * symval,char * alias)531  static int do_css_entry(const char *filename,
532  			void *symval, char *alias)
533  {
534  	DEF_FIELD(symval, css_device_id, type);
535  
536  	sprintf(alias, "css:t%01X", type);
537  	return 1;
538  }
539  
540  /* Looks like: "serio:tyNprNidNexN" */
do_serio_entry(const char * filename,void * symval,char * alias)541  static int do_serio_entry(const char *filename,
542  			  void *symval, char *alias)
543  {
544  	DEF_FIELD(symval, serio_device_id, type);
545  	DEF_FIELD(symval, serio_device_id, proto);
546  	DEF_FIELD(symval, serio_device_id, id);
547  	DEF_FIELD(symval, serio_device_id, extra);
548  
549  	strcpy(alias, "serio:");
550  	ADD(alias, "ty", type != SERIO_ANY, type);
551  	ADD(alias, "pr", proto != SERIO_ANY, proto);
552  	ADD(alias, "id", id != SERIO_ANY, id);
553  	ADD(alias, "ex", extra != SERIO_ANY, extra);
554  
555  	add_wildcard(alias);
556  	return 1;
557  }
558  
559  /* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
560   *             "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
561   *
562   * NOTE: Each driver should use one of the following : _HID, _CIDs
563   *       or _CLS. Also, bb, ss, and pp can be substituted with ??
564   *       as don't care byte.
565   */
do_acpi_entry(const char * filename,void * symval,char * alias)566  static int do_acpi_entry(const char *filename,
567  			void *symval, char *alias)
568  {
569  	DEF_FIELD_ADDR(symval, acpi_device_id, id);
570  	DEF_FIELD_ADDR(symval, acpi_device_id, cls);
571  	DEF_FIELD_ADDR(symval, acpi_device_id, cls_msk);
572  
573  	if (id && strlen((const char *)*id))
574  		sprintf(alias, "acpi*:%s:*", *id);
575  	else if (cls) {
576  		int i, byte_shift, cnt = 0;
577  		unsigned int msk;
578  
579  		sprintf(&alias[cnt], "acpi*:");
580  		cnt = 6;
581  		for (i = 1; i <= 3; i++) {
582  			byte_shift = 8 * (3-i);
583  			msk = (*cls_msk >> byte_shift) & 0xFF;
584  			if (msk)
585  				sprintf(&alias[cnt], "%02x",
586  					(*cls >> byte_shift) & 0xFF);
587  			else
588  				sprintf(&alias[cnt], "??");
589  			cnt += 2;
590  		}
591  		sprintf(&alias[cnt], ":*");
592  	}
593  	return 1;
594  }
595  
596  /* looks like: "pnp:dD" */
do_pnp_device_entry(void * symval,unsigned long size,struct module * mod)597  static void do_pnp_device_entry(void *symval, unsigned long size,
598  				struct module *mod)
599  {
600  	const unsigned long id_size = SIZE_pnp_device_id;
601  	const unsigned int count = (size / id_size)-1;
602  	unsigned int i;
603  
604  	device_id_check(mod->name, "pnp", size, id_size, symval);
605  
606  	for (i = 0; i < count; i++) {
607  		DEF_FIELD_ADDR(symval + i*id_size, pnp_device_id, id);
608  		char acpi_id[sizeof(*id)];
609  		int j;
610  
611  		buf_printf(&mod->dev_table_buf,
612  			   "MODULE_ALIAS(\"pnp:d%s*\");\n", *id);
613  
614  		/* fix broken pnp bus lowercasing */
615  		for (j = 0; j < sizeof(acpi_id); j++)
616  			acpi_id[j] = toupper((*id)[j]);
617  		buf_printf(&mod->dev_table_buf,
618  			   "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
619  	}
620  }
621  
622  /* looks like: "pnp:dD" for every device of the card */
do_pnp_card_entries(void * symval,unsigned long size,struct module * mod)623  static void do_pnp_card_entries(void *symval, unsigned long size,
624  				struct module *mod)
625  {
626  	const unsigned long id_size = SIZE_pnp_card_device_id;
627  	const unsigned int count = (size / id_size)-1;
628  	unsigned int i;
629  
630  	device_id_check(mod->name, "pnp", size, id_size, symval);
631  
632  	for (i = 0; i < count; i++) {
633  		unsigned int j;
634  		DEF_FIELD_ADDR(symval + i * id_size, pnp_card_device_id, devs);
635  
636  		for (j = 0; j < PNP_MAX_DEVICES; j++) {
637  			const char *id = (char *)(*devs)[j].id;
638  			int i2, j2;
639  			int dup = 0;
640  
641  			if (!id[0])
642  				break;
643  
644  			/* find duplicate, already added value */
645  			for (i2 = 0; i2 < i && !dup; i2++) {
646  				DEF_FIELD_ADDR_VAR(symval + i2 * id_size,
647  						   pnp_card_device_id,
648  						   devs, devs_dup);
649  
650  				for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
651  					const char *id2 =
652  						(char *)(*devs_dup)[j2].id;
653  
654  					if (!id2[0])
655  						break;
656  
657  					if (!strcmp(id, id2)) {
658  						dup = 1;
659  						break;
660  					}
661  				}
662  			}
663  
664  			/* add an individual alias for every device entry */
665  			if (!dup) {
666  				char acpi_id[PNP_ID_LEN];
667  				int k;
668  
669  				buf_printf(&mod->dev_table_buf,
670  					   "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
671  
672  				/* fix broken pnp bus lowercasing */
673  				for (k = 0; k < sizeof(acpi_id); k++)
674  					acpi_id[k] = toupper(id[k]);
675  				buf_printf(&mod->dev_table_buf,
676  					   "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
677  			}
678  		}
679  	}
680  }
681  
682  /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
do_pcmcia_entry(const char * filename,void * symval,char * alias)683  static int do_pcmcia_entry(const char *filename,
684  			   void *symval, char *alias)
685  {
686  	unsigned int i;
687  	DEF_FIELD(symval, pcmcia_device_id, match_flags);
688  	DEF_FIELD(symval, pcmcia_device_id, manf_id);
689  	DEF_FIELD(symval, pcmcia_device_id, card_id);
690  	DEF_FIELD(symval, pcmcia_device_id, func_id);
691  	DEF_FIELD(symval, pcmcia_device_id, function);
692  	DEF_FIELD(symval, pcmcia_device_id, device_no);
693  	DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
694  
695  	for (i=0; i<4; i++) {
696  		(*prod_id_hash)[i] = TO_NATIVE((*prod_id_hash)[i]);
697  	}
698  
699  	strcpy(alias, "pcmcia:");
700  	ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
701  	    manf_id);
702  	ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
703  	    card_id);
704  	ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
705  	    func_id);
706  	ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
707  	    function);
708  	ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
709  	    device_no);
710  	ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, (*prod_id_hash)[0]);
711  	ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, (*prod_id_hash)[1]);
712  	ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, (*prod_id_hash)[2]);
713  	ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, (*prod_id_hash)[3]);
714  
715  	add_wildcard(alias);
716  	return 1;
717  }
718  
do_vio_entry(const char * filename,void * symval,char * alias)719  static int do_vio_entry(const char *filename, void *symval,
720  		char *alias)
721  {
722  	char *tmp;
723  	DEF_FIELD_ADDR(symval, vio_device_id, type);
724  	DEF_FIELD_ADDR(symval, vio_device_id, compat);
725  
726  	sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
727  			(*compat)[0] ? *compat : "*");
728  
729  	/* Replace all whitespace with underscores */
730  	for (tmp = alias; tmp && *tmp; tmp++)
731  		if (isspace (*tmp))
732  			*tmp = '_';
733  
734  	add_wildcard(alias);
735  	return 1;
736  }
737  
do_input(char * alias,kernel_ulong_t * arr,unsigned int min,unsigned int max)738  static void do_input(char *alias,
739  		     kernel_ulong_t *arr, unsigned int min, unsigned int max)
740  {
741  	unsigned int i;
742  
743  	for (i = min / BITS_PER_LONG; i < max / BITS_PER_LONG + 1; i++)
744  		arr[i] = TO_NATIVE(arr[i]);
745  	for (i = min; i <= max; i++)
746  		if (arr[i / BITS_PER_LONG] & (1ULL << (i%BITS_PER_LONG)))
747  			sprintf(alias + strlen(alias), "%X,*", i);
748  }
749  
750  /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
do_input_entry(const char * filename,void * symval,char * alias)751  static int do_input_entry(const char *filename, void *symval,
752  			  char *alias)
753  {
754  	DEF_FIELD(symval, input_device_id, flags);
755  	DEF_FIELD(symval, input_device_id, bustype);
756  	DEF_FIELD(symval, input_device_id, vendor);
757  	DEF_FIELD(symval, input_device_id, product);
758  	DEF_FIELD(symval, input_device_id, version);
759  	DEF_FIELD_ADDR(symval, input_device_id, evbit);
760  	DEF_FIELD_ADDR(symval, input_device_id, keybit);
761  	DEF_FIELD_ADDR(symval, input_device_id, relbit);
762  	DEF_FIELD_ADDR(symval, input_device_id, absbit);
763  	DEF_FIELD_ADDR(symval, input_device_id, mscbit);
764  	DEF_FIELD_ADDR(symval, input_device_id, ledbit);
765  	DEF_FIELD_ADDR(symval, input_device_id, sndbit);
766  	DEF_FIELD_ADDR(symval, input_device_id, ffbit);
767  	DEF_FIELD_ADDR(symval, input_device_id, swbit);
768  
769  	sprintf(alias, "input:");
770  
771  	ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
772  	ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
773  	ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
774  	ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);
775  
776  	sprintf(alias + strlen(alias), "-e*");
777  	if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
778  		do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
779  	sprintf(alias + strlen(alias), "k*");
780  	if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
781  		do_input(alias, *keybit,
782  			 INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
783  			 INPUT_DEVICE_ID_KEY_MAX);
784  	sprintf(alias + strlen(alias), "r*");
785  	if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
786  		do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
787  	sprintf(alias + strlen(alias), "a*");
788  	if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
789  		do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
790  	sprintf(alias + strlen(alias), "m*");
791  	if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
792  		do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
793  	sprintf(alias + strlen(alias), "l*");
794  	if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
795  		do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
796  	sprintf(alias + strlen(alias), "s*");
797  	if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
798  		do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
799  	sprintf(alias + strlen(alias), "f*");
800  	if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
801  		do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
802  	sprintf(alias + strlen(alias), "w*");
803  	if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
804  		do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
805  	return 1;
806  }
807  
do_eisa_entry(const char * filename,void * symval,char * alias)808  static int do_eisa_entry(const char *filename, void *symval,
809  		char *alias)
810  {
811  	DEF_FIELD_ADDR(symval, eisa_device_id, sig);
812  	sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", *sig);
813  	return 1;
814  }
815  
816  /* Looks like: parisc:tNhvNrevNsvN */
do_parisc_entry(const char * filename,void * symval,char * alias)817  static int do_parisc_entry(const char *filename, void *symval,
818  		char *alias)
819  {
820  	DEF_FIELD(symval, parisc_device_id, hw_type);
821  	DEF_FIELD(symval, parisc_device_id, hversion);
822  	DEF_FIELD(symval, parisc_device_id, hversion_rev);
823  	DEF_FIELD(symval, parisc_device_id, sversion);
824  
825  	strcpy(alias, "parisc:");
826  	ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
827  	ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
828  	ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
829  	ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);
830  
831  	add_wildcard(alias);
832  	return 1;
833  }
834  
835  /* Looks like: sdio:cNvNdN. */
do_sdio_entry(const char * filename,void * symval,char * alias)836  static int do_sdio_entry(const char *filename,
837  			void *symval, char *alias)
838  {
839  	DEF_FIELD(symval, sdio_device_id, class);
840  	DEF_FIELD(symval, sdio_device_id, vendor);
841  	DEF_FIELD(symval, sdio_device_id, device);
842  
843  	strcpy(alias, "sdio:");
844  	ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
845  	ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
846  	ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
847  	add_wildcard(alias);
848  	return 1;
849  }
850  
851  /* Looks like: ssb:vNidNrevN. */
do_ssb_entry(const char * filename,void * symval,char * alias)852  static int do_ssb_entry(const char *filename,
853  			void *symval, char *alias)
854  {
855  	DEF_FIELD(symval, ssb_device_id, vendor);
856  	DEF_FIELD(symval, ssb_device_id, coreid);
857  	DEF_FIELD(symval, ssb_device_id, revision);
858  
859  	strcpy(alias, "ssb:");
860  	ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
861  	ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
862  	ADD(alias, "rev", revision != SSB_ANY_REV, revision);
863  	add_wildcard(alias);
864  	return 1;
865  }
866  
867  /* Looks like: bcma:mNidNrevNclN. */
do_bcma_entry(const char * filename,void * symval,char * alias)868  static int do_bcma_entry(const char *filename,
869  			 void *symval, char *alias)
870  {
871  	DEF_FIELD(symval, bcma_device_id, manuf);
872  	DEF_FIELD(symval, bcma_device_id, id);
873  	DEF_FIELD(symval, bcma_device_id, rev);
874  	DEF_FIELD(symval, bcma_device_id, class);
875  
876  	strcpy(alias, "bcma:");
877  	ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
878  	ADD(alias, "id", id != BCMA_ANY_ID, id);
879  	ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
880  	ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
881  	add_wildcard(alias);
882  	return 1;
883  }
884  
885  /* Looks like: virtio:dNvN */
do_virtio_entry(const char * filename,void * symval,char * alias)886  static int do_virtio_entry(const char *filename, void *symval,
887  			   char *alias)
888  {
889  	DEF_FIELD(symval, virtio_device_id, device);
890  	DEF_FIELD(symval, virtio_device_id, vendor);
891  
892  	strcpy(alias, "virtio:");
893  	ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
894  	ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
895  
896  	add_wildcard(alias);
897  	return 1;
898  }
899  
900  /*
901   * Looks like: vmbus:guid
902   * Each byte of the guid will be represented by two hex characters
903   * in the name.
904   */
905  
do_vmbus_entry(const char * filename,void * symval,char * alias)906  static int do_vmbus_entry(const char *filename, void *symval,
907  			  char *alias)
908  {
909  	int i;
910  	DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
911  	char guid_name[(sizeof(*guid) + 1) * 2];
912  
913  	for (i = 0; i < (sizeof(*guid) * 2); i += 2)
914  		sprintf(&guid_name[i], "%02x", TO_NATIVE((guid->b)[i/2]));
915  
916  	strcpy(alias, "vmbus:");
917  	strcat(alias, guid_name);
918  
919  	return 1;
920  }
921  
922  /* Looks like: rpmsg:S */
do_rpmsg_entry(const char * filename,void * symval,char * alias)923  static int do_rpmsg_entry(const char *filename, void *symval,
924  			  char *alias)
925  {
926  	DEF_FIELD_ADDR(symval, rpmsg_device_id, name);
927  	sprintf(alias, RPMSG_DEVICE_MODALIAS_FMT, *name);
928  
929  	return 1;
930  }
931  
932  /* Looks like: i2c:S */
do_i2c_entry(const char * filename,void * symval,char * alias)933  static int do_i2c_entry(const char *filename, void *symval,
934  			char *alias)
935  {
936  	DEF_FIELD_ADDR(symval, i2c_device_id, name);
937  	sprintf(alias, I2C_MODULE_PREFIX "%s", *name);
938  
939  	return 1;
940  }
941  
do_i3c_entry(const char * filename,void * symval,char * alias)942  static int do_i3c_entry(const char *filename, void *symval,
943  			char *alias)
944  {
945  	DEF_FIELD(symval, i3c_device_id, match_flags);
946  	DEF_FIELD(symval, i3c_device_id, dcr);
947  	DEF_FIELD(symval, i3c_device_id, manuf_id);
948  	DEF_FIELD(symval, i3c_device_id, part_id);
949  	DEF_FIELD(symval, i3c_device_id, extra_info);
950  
951  	strcpy(alias, "i3c:");
952  	ADD(alias, "dcr", match_flags & I3C_MATCH_DCR, dcr);
953  	ADD(alias, "manuf", match_flags & I3C_MATCH_MANUF, manuf_id);
954  	ADD(alias, "part", match_flags & I3C_MATCH_PART, part_id);
955  	ADD(alias, "ext", match_flags & I3C_MATCH_EXTRA_INFO, extra_info);
956  
957  	return 1;
958  }
959  
960  /* Looks like: spi:S */
do_spi_entry(const char * filename,void * symval,char * alias)961  static int do_spi_entry(const char *filename, void *symval,
962  			char *alias)
963  {
964  	DEF_FIELD_ADDR(symval, spi_device_id, name);
965  	sprintf(alias, SPI_MODULE_PREFIX "%s", *name);
966  
967  	return 1;
968  }
969  
970  static const struct dmifield {
971  	const char *prefix;
972  	int field;
973  } dmi_fields[] = {
974  	{ "bvn", DMI_BIOS_VENDOR },
975  	{ "bvr", DMI_BIOS_VERSION },
976  	{ "bd",  DMI_BIOS_DATE },
977  	{ "br",  DMI_BIOS_RELEASE },
978  	{ "efr", DMI_EC_FIRMWARE_RELEASE },
979  	{ "svn", DMI_SYS_VENDOR },
980  	{ "pn",  DMI_PRODUCT_NAME },
981  	{ "pvr", DMI_PRODUCT_VERSION },
982  	{ "rvn", DMI_BOARD_VENDOR },
983  	{ "rn",  DMI_BOARD_NAME },
984  	{ "rvr", DMI_BOARD_VERSION },
985  	{ "cvn", DMI_CHASSIS_VENDOR },
986  	{ "ct",  DMI_CHASSIS_TYPE },
987  	{ "cvr", DMI_CHASSIS_VERSION },
988  	{ NULL,  DMI_NONE }
989  };
990  
dmi_ascii_filter(char * d,const char * s)991  static void dmi_ascii_filter(char *d, const char *s)
992  {
993  	/* Filter out characters we don't want to see in the modalias string */
994  	for (; *s; s++)
995  		if (*s > ' ' && *s < 127 && *s != ':')
996  			*(d++) = *s;
997  
998  	*d = 0;
999  }
1000  
1001  
do_dmi_entry(const char * filename,void * symval,char * alias)1002  static int do_dmi_entry(const char *filename, void *symval,
1003  			char *alias)
1004  {
1005  	int i, j;
1006  	DEF_FIELD_ADDR(symval, dmi_system_id, matches);
1007  	sprintf(alias, "dmi*");
1008  
1009  	for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
1010  		for (j = 0; j < 4; j++) {
1011  			if ((*matches)[j].slot &&
1012  			    (*matches)[j].slot == dmi_fields[i].field) {
1013  				sprintf(alias + strlen(alias), ":%s*",
1014  					dmi_fields[i].prefix);
1015  				dmi_ascii_filter(alias + strlen(alias),
1016  						 (*matches)[j].substr);
1017  				strcat(alias, "*");
1018  			}
1019  		}
1020  	}
1021  
1022  	strcat(alias, ":");
1023  	return 1;
1024  }
1025  
do_platform_entry(const char * filename,void * symval,char * alias)1026  static int do_platform_entry(const char *filename,
1027  			     void *symval, char *alias)
1028  {
1029  	DEF_FIELD_ADDR(symval, platform_device_id, name);
1030  	sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
1031  	return 1;
1032  }
1033  
do_mdio_entry(const char * filename,void * symval,char * alias)1034  static int do_mdio_entry(const char *filename,
1035  			 void *symval, char *alias)
1036  {
1037  	int i;
1038  	DEF_FIELD(symval, mdio_device_id, phy_id);
1039  	DEF_FIELD(symval, mdio_device_id, phy_id_mask);
1040  
1041  	alias += sprintf(alias, MDIO_MODULE_PREFIX);
1042  
1043  	for (i = 0; i < 32; i++) {
1044  		if (!((phy_id_mask >> (31-i)) & 1))
1045  			*(alias++) = '?';
1046  		else if ((phy_id >> (31-i)) & 1)
1047  			*(alias++) = '1';
1048  		else
1049  			*(alias++) = '0';
1050  	}
1051  
1052  	/* Terminate the string */
1053  	*alias = 0;
1054  
1055  	return 1;
1056  }
1057  
1058  /* Looks like: zorro:iN. */
do_zorro_entry(const char * filename,void * symval,char * alias)1059  static int do_zorro_entry(const char *filename, void *symval,
1060  			  char *alias)
1061  {
1062  	DEF_FIELD(symval, zorro_device_id, id);
1063  	strcpy(alias, "zorro:");
1064  	ADD(alias, "i", id != ZORRO_WILDCARD, id);
1065  	return 1;
1066  }
1067  
1068  /* looks like: "pnp:dD" */
do_isapnp_entry(const char * filename,void * symval,char * alias)1069  static int do_isapnp_entry(const char *filename,
1070  			   void *symval, char *alias)
1071  {
1072  	DEF_FIELD(symval, isapnp_device_id, vendor);
1073  	DEF_FIELD(symval, isapnp_device_id, function);
1074  	sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
1075  		'A' + ((vendor >> 2) & 0x3f) - 1,
1076  		'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
1077  		'A' + ((vendor >> 8) & 0x1f) - 1,
1078  		(function >> 4) & 0x0f, function & 0x0f,
1079  		(function >> 12) & 0x0f, (function >> 8) & 0x0f);
1080  	return 1;
1081  }
1082  
1083  /* Looks like: "ipack:fNvNdN". */
do_ipack_entry(const char * filename,void * symval,char * alias)1084  static int do_ipack_entry(const char *filename,
1085  			  void *symval, char *alias)
1086  {
1087  	DEF_FIELD(symval, ipack_device_id, format);
1088  	DEF_FIELD(symval, ipack_device_id, vendor);
1089  	DEF_FIELD(symval, ipack_device_id, device);
1090  	strcpy(alias, "ipack:");
1091  	ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
1092  	ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
1093  	ADD(alias, "d", device != IPACK_ANY_ID, device);
1094  	add_wildcard(alias);
1095  	return 1;
1096  }
1097  
1098  /*
1099   * Append a match expression for a single masked hex digit.
1100   * outp points to a pointer to the character at which to append.
1101   *	*outp is updated on return to point just after the appended text,
1102   *	to facilitate further appending.
1103   */
append_nibble_mask(char ** outp,unsigned int nibble,unsigned int mask)1104  static void append_nibble_mask(char **outp,
1105  			       unsigned int nibble, unsigned int mask)
1106  {
1107  	char *p = *outp;
1108  	unsigned int i;
1109  
1110  	switch (mask) {
1111  	case 0:
1112  		*p++ = '?';
1113  		break;
1114  
1115  	case 0xf:
1116  		p += sprintf(p, "%X",  nibble);
1117  		break;
1118  
1119  	default:
1120  		/*
1121  		 * Dumbly emit a match pattern for all possible matching
1122  		 * digits.  This could be improved in some cases using ranges,
1123  		 * but it has the advantage of being trivially correct, and is
1124  		 * often optimal.
1125  		 */
1126  		*p++ = '[';
1127  		for (i = 0; i < 0x10; i++)
1128  			if ((i & mask) == nibble)
1129  				p += sprintf(p, "%X", i);
1130  		*p++ = ']';
1131  	}
1132  
1133  	/* Ensure that the string remains NUL-terminated: */
1134  	*p = '\0';
1135  
1136  	/* Advance the caller's end-of-string pointer: */
1137  	*outp = p;
1138  }
1139  
1140  /*
1141   * looks like: "amba:dN"
1142   *
1143   * N is exactly 8 digits, where each is an upper-case hex digit, or
1144   *	a ? or [] pattern matching exactly one digit.
1145   */
do_amba_entry(const char * filename,void * symval,char * alias)1146  static int do_amba_entry(const char *filename,
1147  			 void *symval, char *alias)
1148  {
1149  	unsigned int digit;
1150  	char *p = alias;
1151  	DEF_FIELD(symval, amba_id, id);
1152  	DEF_FIELD(symval, amba_id, mask);
1153  
1154  	if ((id & mask) != id)
1155  		fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: id=0x%08X, mask=0x%08X.  Please fix this driver.\n",
1156  		      filename, id, mask);
1157  
1158  	p += sprintf(alias, "amba:d");
1159  	for (digit = 0; digit < 8; digit++)
1160  		append_nibble_mask(&p,
1161  				   (id >> (4 * (7 - digit))) & 0xf,
1162  				   (mask >> (4 * (7 - digit))) & 0xf);
1163  
1164  	return 1;
1165  }
1166  
1167  /*
1168   * looks like: "mipscdmm:tN"
1169   *
1170   * N is exactly 2 digits, where each is an upper-case hex digit, or
1171   *	a ? or [] pattern matching exactly one digit.
1172   */
do_mips_cdmm_entry(const char * filename,void * symval,char * alias)1173  static int do_mips_cdmm_entry(const char *filename,
1174  			      void *symval, char *alias)
1175  {
1176  	DEF_FIELD(symval, mips_cdmm_device_id, type);
1177  
1178  	sprintf(alias, "mipscdmm:t%02X*", type);
1179  	return 1;
1180  }
1181  
1182  /* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
1183   * All fields are numbers. It would be nicer to use strings for vendor
1184   * and feature, but getting those out of the build system here is too
1185   * complicated.
1186   */
1187  
do_x86cpu_entry(const char * filename,void * symval,char * alias)1188  static int do_x86cpu_entry(const char *filename, void *symval,
1189  			   char *alias)
1190  {
1191  	DEF_FIELD(symval, x86_cpu_id, feature);
1192  	DEF_FIELD(symval, x86_cpu_id, family);
1193  	DEF_FIELD(symval, x86_cpu_id, model);
1194  	DEF_FIELD(symval, x86_cpu_id, vendor);
1195  
1196  	strcpy(alias, "cpu:type:x86,");
1197  	ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor);
1198  	ADD(alias, "fam", family != X86_FAMILY_ANY, family);
1199  	ADD(alias, "mod", model  != X86_MODEL_ANY,  model);
1200  	strcat(alias, ":feature:*");
1201  	if (feature != X86_FEATURE_ANY)
1202  		sprintf(alias + strlen(alias), "%04X*", feature);
1203  	return 1;
1204  }
1205  
1206  /* LOOKS like cpu:type:*:feature:*FEAT* */
do_cpu_entry(const char * filename,void * symval,char * alias)1207  static int do_cpu_entry(const char *filename, void *symval, char *alias)
1208  {
1209  	DEF_FIELD(symval, cpu_feature, feature);
1210  
1211  	sprintf(alias, "cpu:type:*:feature:*%04X*", feature);
1212  	return 1;
1213  }
1214  
1215  /* Looks like: mei:S:uuid:N:* */
do_mei_entry(const char * filename,void * symval,char * alias)1216  static int do_mei_entry(const char *filename, void *symval,
1217  			char *alias)
1218  {
1219  	DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
1220  	DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid);
1221  	DEF_FIELD(symval, mei_cl_device_id, version);
1222  
1223  	sprintf(alias, MEI_CL_MODULE_PREFIX);
1224  	sprintf(alias + strlen(alias), "%s:",  (*name)[0]  ? *name : "*");
1225  	add_uuid(alias, *uuid);
1226  	ADD(alias, ":", version != MEI_CL_VERSION_ANY, version);
1227  
1228  	strcat(alias, ":*");
1229  
1230  	return 1;
1231  }
1232  
1233  /* Looks like: rapidio:vNdNavNadN */
do_rio_entry(const char * filename,void * symval,char * alias)1234  static int do_rio_entry(const char *filename,
1235  			void *symval, char *alias)
1236  {
1237  	DEF_FIELD(symval, rio_device_id, did);
1238  	DEF_FIELD(symval, rio_device_id, vid);
1239  	DEF_FIELD(symval, rio_device_id, asm_did);
1240  	DEF_FIELD(symval, rio_device_id, asm_vid);
1241  
1242  	strcpy(alias, "rapidio:");
1243  	ADD(alias, "v", vid != RIO_ANY_ID, vid);
1244  	ADD(alias, "d", did != RIO_ANY_ID, did);
1245  	ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
1246  	ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
1247  
1248  	add_wildcard(alias);
1249  	return 1;
1250  }
1251  
1252  /* Looks like: ulpi:vNpN */
do_ulpi_entry(const char * filename,void * symval,char * alias)1253  static int do_ulpi_entry(const char *filename, void *symval,
1254  			 char *alias)
1255  {
1256  	DEF_FIELD(symval, ulpi_device_id, vendor);
1257  	DEF_FIELD(symval, ulpi_device_id, product);
1258  
1259  	sprintf(alias, "ulpi:v%04xp%04x", vendor, product);
1260  
1261  	return 1;
1262  }
1263  
1264  /* Looks like: hdaudio:vNrNaN */
do_hda_entry(const char * filename,void * symval,char * alias)1265  static int do_hda_entry(const char *filename, void *symval, char *alias)
1266  {
1267  	DEF_FIELD(symval, hda_device_id, vendor_id);
1268  	DEF_FIELD(symval, hda_device_id, rev_id);
1269  	DEF_FIELD(symval, hda_device_id, api_version);
1270  
1271  	strcpy(alias, "hdaudio:");
1272  	ADD(alias, "v", vendor_id != 0, vendor_id);
1273  	ADD(alias, "r", rev_id != 0, rev_id);
1274  	ADD(alias, "a", api_version != 0, api_version);
1275  
1276  	add_wildcard(alias);
1277  	return 1;
1278  }
1279  
1280  /* Looks like: sdw:mNpNvNcN */
do_sdw_entry(const char * filename,void * symval,char * alias)1281  static int do_sdw_entry(const char *filename, void *symval, char *alias)
1282  {
1283  	DEF_FIELD(symval, sdw_device_id, mfg_id);
1284  	DEF_FIELD(symval, sdw_device_id, part_id);
1285  	DEF_FIELD(symval, sdw_device_id, sdw_version);
1286  	DEF_FIELD(symval, sdw_device_id, class_id);
1287  
1288  	strcpy(alias, "sdw:");
1289  	ADD(alias, "m", mfg_id != 0, mfg_id);
1290  	ADD(alias, "p", part_id != 0, part_id);
1291  	ADD(alias, "v", sdw_version != 0, sdw_version);
1292  	ADD(alias, "c", class_id != 0, class_id);
1293  
1294  	add_wildcard(alias);
1295  	return 1;
1296  }
1297  
1298  /* Looks like: fsl-mc:vNdN */
do_fsl_mc_entry(const char * filename,void * symval,char * alias)1299  static int do_fsl_mc_entry(const char *filename, void *symval,
1300  			   char *alias)
1301  {
1302  	DEF_FIELD(symval, fsl_mc_device_id, vendor);
1303  	DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type);
1304  
1305  	sprintf(alias, "fsl-mc:v%08Xd%s", vendor, *obj_type);
1306  	return 1;
1307  }
1308  
1309  /* Looks like: tbsvc:kSpNvNrN */
do_tbsvc_entry(const char * filename,void * symval,char * alias)1310  static int do_tbsvc_entry(const char *filename, void *symval, char *alias)
1311  {
1312  	DEF_FIELD(symval, tb_service_id, match_flags);
1313  	DEF_FIELD_ADDR(symval, tb_service_id, protocol_key);
1314  	DEF_FIELD(symval, tb_service_id, protocol_id);
1315  	DEF_FIELD(symval, tb_service_id, protocol_version);
1316  	DEF_FIELD(symval, tb_service_id, protocol_revision);
1317  
1318  	strcpy(alias, "tbsvc:");
1319  	if (match_flags & TBSVC_MATCH_PROTOCOL_KEY)
1320  		sprintf(alias + strlen(alias), "k%s", *protocol_key);
1321  	else
1322  		strcat(alias + strlen(alias), "k*");
1323  	ADD(alias, "p", match_flags & TBSVC_MATCH_PROTOCOL_ID, protocol_id);
1324  	ADD(alias, "v", match_flags & TBSVC_MATCH_PROTOCOL_VERSION,
1325  	    protocol_version);
1326  	ADD(alias, "r", match_flags & TBSVC_MATCH_PROTOCOL_REVISION,
1327  	    protocol_revision);
1328  
1329  	add_wildcard(alias);
1330  	return 1;
1331  }
1332  
1333  /* Looks like: typec:idNmN */
do_typec_entry(const char * filename,void * symval,char * alias)1334  static int do_typec_entry(const char *filename, void *symval, char *alias)
1335  {
1336  	DEF_FIELD(symval, typec_device_id, svid);
1337  	DEF_FIELD(symval, typec_device_id, mode);
1338  
1339  	sprintf(alias, "typec:id%04X", svid);
1340  	ADD(alias, "m", mode != TYPEC_ANY_MODE, mode);
1341  
1342  	return 1;
1343  }
1344  
1345  /* Looks like: tee:uuid */
do_tee_entry(const char * filename,void * symval,char * alias)1346  static int do_tee_entry(const char *filename, void *symval, char *alias)
1347  {
1348  	DEF_FIELD_ADDR(symval, tee_client_device_id, uuid);
1349  
1350  	sprintf(alias, "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
1351  		uuid->b[0], uuid->b[1], uuid->b[2], uuid->b[3], uuid->b[4],
1352  		uuid->b[5], uuid->b[6], uuid->b[7], uuid->b[8], uuid->b[9],
1353  		uuid->b[10], uuid->b[11], uuid->b[12], uuid->b[13], uuid->b[14],
1354  		uuid->b[15]);
1355  
1356  	add_wildcard(alias);
1357  	return 1;
1358  }
1359  
1360  /* Looks like: wmi:guid */
do_wmi_entry(const char * filename,void * symval,char * alias)1361  static int do_wmi_entry(const char *filename, void *symval, char *alias)
1362  {
1363  	int len;
1364  	DEF_FIELD_ADDR(symval, wmi_device_id, guid_string);
1365  
1366  	if (strlen(*guid_string) != UUID_STRING_LEN) {
1367  		warn("Invalid WMI device id 'wmi:%s' in '%s'\n",
1368  				*guid_string, filename);
1369  		return 0;
1370  	}
1371  
1372  	len = snprintf(alias, ALIAS_SIZE, WMI_MODULE_PREFIX "%s", *guid_string);
1373  	if (len < 0 || len >= ALIAS_SIZE) {
1374  		warn("Could not generate all MODULE_ALIAS's in '%s'\n",
1375  				filename);
1376  		return 0;
1377  	}
1378  	return 1;
1379  }
1380  
1381  /* Looks like: mhi:S */
do_mhi_entry(const char * filename,void * symval,char * alias)1382  static int do_mhi_entry(const char *filename, void *symval, char *alias)
1383  {
1384  	DEF_FIELD_ADDR(symval, mhi_device_id, chan);
1385  	sprintf(alias, MHI_DEVICE_MODALIAS_FMT, *chan);
1386  	return 1;
1387  }
1388  
1389  /* Looks like: mhi_ep:S */
do_mhi_ep_entry(const char * filename,void * symval,char * alias)1390  static int do_mhi_ep_entry(const char *filename, void *symval, char *alias)
1391  {
1392  	DEF_FIELD_ADDR(symval, mhi_device_id, chan);
1393  	sprintf(alias, MHI_EP_DEVICE_MODALIAS_FMT, *chan);
1394  
1395  	return 1;
1396  }
1397  
1398  /* Looks like: ishtp:{guid} */
do_ishtp_entry(const char * filename,void * symval,char * alias)1399  static int do_ishtp_entry(const char *filename, void *symval, char *alias)
1400  {
1401  	DEF_FIELD_ADDR(symval, ishtp_device_id, guid);
1402  
1403  	strcpy(alias, ISHTP_MODULE_PREFIX "{");
1404  	add_guid(alias, *guid);
1405  	strcat(alias, "}");
1406  
1407  	return 1;
1408  }
1409  
do_auxiliary_entry(const char * filename,void * symval,char * alias)1410  static int do_auxiliary_entry(const char *filename, void *symval, char *alias)
1411  {
1412  	DEF_FIELD_ADDR(symval, auxiliary_device_id, name);
1413  	sprintf(alias, AUXILIARY_MODULE_PREFIX "%s", *name);
1414  
1415  	return 1;
1416  }
1417  
1418  /*
1419   * Looks like: ssam:dNcNtNiNfN
1420   *
1421   * N is exactly 2 digits, where each is an upper-case hex digit.
1422   */
do_ssam_entry(const char * filename,void * symval,char * alias)1423  static int do_ssam_entry(const char *filename, void *symval, char *alias)
1424  {
1425  	DEF_FIELD(symval, ssam_device_id, match_flags);
1426  	DEF_FIELD(symval, ssam_device_id, domain);
1427  	DEF_FIELD(symval, ssam_device_id, category);
1428  	DEF_FIELD(symval, ssam_device_id, target);
1429  	DEF_FIELD(symval, ssam_device_id, instance);
1430  	DEF_FIELD(symval, ssam_device_id, function);
1431  
1432  	sprintf(alias, "ssam:d%02Xc%02X", domain, category);
1433  	ADD(alias, "t", match_flags & SSAM_MATCH_TARGET, target);
1434  	ADD(alias, "i", match_flags & SSAM_MATCH_INSTANCE, instance);
1435  	ADD(alias, "f", match_flags & SSAM_MATCH_FUNCTION, function);
1436  
1437  	return 1;
1438  }
1439  
1440  /* Looks like: dfl:tNfN */
do_dfl_entry(const char * filename,void * symval,char * alias)1441  static int do_dfl_entry(const char *filename, void *symval, char *alias)
1442  {
1443  	DEF_FIELD(symval, dfl_device_id, type);
1444  	DEF_FIELD(symval, dfl_device_id, feature_id);
1445  
1446  	sprintf(alias, "dfl:t%04Xf%04X", type, feature_id);
1447  
1448  	add_wildcard(alias);
1449  	return 1;
1450  }
1451  
1452  /* Looks like: cdx:vNdN */
do_cdx_entry(const char * filename,void * symval,char * alias)1453  static int do_cdx_entry(const char *filename, void *symval,
1454  			char *alias)
1455  {
1456  	DEF_FIELD(symval, cdx_device_id, vendor);
1457  	DEF_FIELD(symval, cdx_device_id, device);
1458  	DEF_FIELD(symval, cdx_device_id, override_only);
1459  
1460  	switch (override_only) {
1461  	case 0:
1462  		strcpy(alias, "cdx:");
1463  		break;
1464  	case CDX_ID_F_VFIO_DRIVER_OVERRIDE:
1465  		strcpy(alias, "vfio_cdx:");
1466  		break;
1467  	default:
1468  		warn("Unknown CDX driver_override alias %08X\n",
1469  		     override_only);
1470  		return 0;
1471  	}
1472  
1473  	ADD(alias, "v", vendor != CDX_ANY_ID, vendor);
1474  	ADD(alias, "d", device != CDX_ANY_ID, device);
1475  	return 1;
1476  }
1477  
1478  /* Does namelen bytes of name exactly match the symbol? */
sym_is(const char * name,unsigned namelen,const char * symbol)1479  static bool sym_is(const char *name, unsigned namelen, const char *symbol)
1480  {
1481  	if (namelen != strlen(symbol))
1482  		return false;
1483  
1484  	return memcmp(name, symbol, namelen) == 0;
1485  }
1486  
do_table(void * symval,unsigned long size,unsigned long id_size,const char * device_id,int (* do_entry)(const char * filename,void * symval,char * alias),struct module * mod)1487  static void do_table(void *symval, unsigned long size,
1488  		     unsigned long id_size,
1489  		     const char *device_id,
1490  		     int (*do_entry)(const char *filename, void *symval, char *alias),
1491  		     struct module *mod)
1492  {
1493  	unsigned int i;
1494  	char alias[ALIAS_SIZE];
1495  
1496  	device_id_check(mod->name, device_id, size, id_size, symval);
1497  	/* Leave last one: it's the terminator. */
1498  	size -= id_size;
1499  
1500  	for (i = 0; i < size; i += id_size) {
1501  		if (do_entry(mod->name, symval+i, alias)) {
1502  			buf_printf(&mod->dev_table_buf,
1503  				   "MODULE_ALIAS(\"%s\");\n", alias);
1504  		}
1505  	}
1506  }
1507  
1508  static const struct devtable devtable[] = {
1509  	{"hid", SIZE_hid_device_id, do_hid_entry},
1510  	{"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry},
1511  	{"pci", SIZE_pci_device_id, do_pci_entry},
1512  	{"ccw", SIZE_ccw_device_id, do_ccw_entry},
1513  	{"ap", SIZE_ap_device_id, do_ap_entry},
1514  	{"css", SIZE_css_device_id, do_css_entry},
1515  	{"serio", SIZE_serio_device_id, do_serio_entry},
1516  	{"acpi", SIZE_acpi_device_id, do_acpi_entry},
1517  	{"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry},
1518  	{"vio", SIZE_vio_device_id, do_vio_entry},
1519  	{"input", SIZE_input_device_id, do_input_entry},
1520  	{"eisa", SIZE_eisa_device_id, do_eisa_entry},
1521  	{"parisc", SIZE_parisc_device_id, do_parisc_entry},
1522  	{"sdio", SIZE_sdio_device_id, do_sdio_entry},
1523  	{"ssb", SIZE_ssb_device_id, do_ssb_entry},
1524  	{"bcma", SIZE_bcma_device_id, do_bcma_entry},
1525  	{"virtio", SIZE_virtio_device_id, do_virtio_entry},
1526  	{"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry},
1527  	{"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry},
1528  	{"i2c", SIZE_i2c_device_id, do_i2c_entry},
1529  	{"i3c", SIZE_i3c_device_id, do_i3c_entry},
1530  	{"spi", SIZE_spi_device_id, do_spi_entry},
1531  	{"dmi", SIZE_dmi_system_id, do_dmi_entry},
1532  	{"platform", SIZE_platform_device_id, do_platform_entry},
1533  	{"mdio", SIZE_mdio_device_id, do_mdio_entry},
1534  	{"zorro", SIZE_zorro_device_id, do_zorro_entry},
1535  	{"isapnp", SIZE_isapnp_device_id, do_isapnp_entry},
1536  	{"ipack", SIZE_ipack_device_id, do_ipack_entry},
1537  	{"amba", SIZE_amba_id, do_amba_entry},
1538  	{"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry},
1539  	{"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry},
1540  	{"cpu", SIZE_cpu_feature, do_cpu_entry},
1541  	{"mei", SIZE_mei_cl_device_id, do_mei_entry},
1542  	{"rapidio", SIZE_rio_device_id, do_rio_entry},
1543  	{"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
1544  	{"hdaudio", SIZE_hda_device_id, do_hda_entry},
1545  	{"sdw", SIZE_sdw_device_id, do_sdw_entry},
1546  	{"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry},
1547  	{"tbsvc", SIZE_tb_service_id, do_tbsvc_entry},
1548  	{"typec", SIZE_typec_device_id, do_typec_entry},
1549  	{"tee", SIZE_tee_client_device_id, do_tee_entry},
1550  	{"wmi", SIZE_wmi_device_id, do_wmi_entry},
1551  	{"mhi", SIZE_mhi_device_id, do_mhi_entry},
1552  	{"mhi_ep", SIZE_mhi_device_id, do_mhi_ep_entry},
1553  	{"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry},
1554  	{"ssam", SIZE_ssam_device_id, do_ssam_entry},
1555  	{"dfl", SIZE_dfl_device_id, do_dfl_entry},
1556  	{"ishtp", SIZE_ishtp_device_id, do_ishtp_entry},
1557  	{"cdx", SIZE_cdx_device_id, do_cdx_entry},
1558  };
1559  
1560  /* Create MODULE_ALIAS() statements.
1561   * At this time, we cannot write the actual output C source yet,
1562   * so we write into the mod->dev_table_buf buffer. */
handle_moddevtable(struct module * mod,struct elf_info * info,Elf_Sym * sym,const char * symname)1563  void handle_moddevtable(struct module *mod, struct elf_info *info,
1564  			Elf_Sym *sym, const char *symname)
1565  {
1566  	void *symval;
1567  	char *zeros = NULL;
1568  	const char *name, *identifier;
1569  	unsigned int namelen;
1570  
1571  	/* We're looking for a section relative symbol */
1572  	if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
1573  		return;
1574  
1575  	/* We're looking for an object */
1576  	if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
1577  		return;
1578  
1579  	/* All our symbols are of form __mod_<name>__<identifier>_device_table. */
1580  	if (strncmp(symname, "__mod_", strlen("__mod_")))
1581  		return;
1582  	name = symname + strlen("__mod_");
1583  	namelen = strlen(name);
1584  	if (namelen < strlen("_device_table"))
1585  		return;
1586  	if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
1587  		return;
1588  	identifier = strstr(name, "__");
1589  	if (!identifier)
1590  		return;
1591  	namelen = identifier - name;
1592  
1593  	/* Handle all-NULL symbols allocated into .bss */
1594  	if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
1595  		zeros = calloc(1, sym->st_size);
1596  		symval = zeros;
1597  	} else {
1598  		symval = sym_get_data(info, sym);
1599  	}
1600  
1601  	/* First handle the "special" cases */
1602  	if (sym_is(name, namelen, "usb"))
1603  		do_usb_table(symval, sym->st_size, mod);
1604  	else if (sym_is(name, namelen, "of"))
1605  		do_of_table(symval, sym->st_size, mod);
1606  	else if (sym_is(name, namelen, "pnp"))
1607  		do_pnp_device_entry(symval, sym->st_size, mod);
1608  	else if (sym_is(name, namelen, "pnp_card"))
1609  		do_pnp_card_entries(symval, sym->st_size, mod);
1610  	else {
1611  		int i;
1612  
1613  		for (i = 0; i < ARRAY_SIZE(devtable); i++) {
1614  			const struct devtable *p = &devtable[i];
1615  
1616  			if (sym_is(name, namelen, p->device_id)) {
1617  				do_table(symval, sym->st_size, p->id_size,
1618  					 p->device_id, p->do_entry, mod);
1619  				break;
1620  			}
1621  		}
1622  	}
1623  	free(zeros);
1624  }
1625  
1626  /* Now add out buffered information to the generated C source */
add_moddevtable(struct buffer * buf,struct module * mod)1627  void add_moddevtable(struct buffer *buf, struct module *mod)
1628  {
1629  	buf_printf(buf, "\n");
1630  	buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
1631  	free(mod->dev_table_buf.p);
1632  }
1633