scripts/mod/file2alias.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
		if (dma->bufs[i].buf_count) {
			for (j = 0; j < dma->bufs[i].buf_count; j++) {
				kfree(dma->bufs[i].buflist[j].dev_private);
			}
			kfree(dma->bufs[i].buflist);
		}
	}

	kfree(dma->buflist);
	kfree(dma->pagelist);
	kfree(dev->dma);
	dev->dma = NULL;
}

/**
 * Free a buffer.
 *
 * \param dev DRM device.
 * \param buf buffer to free.
 *
 * Resets the fields of \p buf.
 */
void drm_legacy_free_buffer(struct drm_device *dev, struct drm_buf * buf)
{
	if (!buf)
		return;

	buf->waiting = 0;
	buf->pending = 0;
	buf->file_priv = NULL;
	buf->used = 0;
}

/**
 * Reclaim the buffers.
 *
 * \param file_priv DRM file private.
 *
 * Frees each buffer associated with \p file_priv not already on the hardware.
 */
void drm_legacy_reclaim_buffers(struct drm_device *dev,
				struct drm_file *file_priv)
{
	struct drm_device_dma *dma = dev->dma;
	int i;

	if (!dma)
		return;
	for (i = 0; i < dma->buf_count; i++) {
		if (dma->buflist[i]->file_priv == file_priv) {
			switch (dma->buflist[i]->list) {
			case DRM_LIST_NONE:
				drm_legacy_free_buffer(dev, dma->buflist[i]);
				break;
			case DRM_LIST_WAIT:
				dma->buflist[i]->list = DRM_LIST_RECLAIM;
				break;
			default:
				/* Buffer already on hardware. */
				break;
			}
		}
	}
}
/* Simple code to turn various tables in an ELF file into alias definitions.
 * This deals with kernel datastructures where they should be
 * dealt with: in the kernel source.
 *
 * Copyright 2002-2003  Rusty Russell, IBM Corporation
 *           2003       Kai Germaschewski
 *
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 */

#include "modpost.h"

/* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
 * use either stdint.h or inttypes.h for the rest. */
#if KERNEL_ELFCLASS == ELFCLASS32
typedef Elf32_Addr	kernel_ulong_t;
#define BITS_PER_LONG 32
#else
typedef Elf64_Addr	kernel_ulong_t;
#define BITS_PER_LONG 64
#endif
#ifdef __sun__
#include <inttypes.h>
#else
#include <stdint.h>
#endif

#include <ctype.h>

typedef uint32_t	__u32;
typedef uint16_t	__u16;
typedef unsigned char	__u8;

/* Big exception to the "don't include kernel headers into userspace, which
 * even potentially has different endianness and word sizes, since
 * we handle those differences explicitly below */
#include "../../include/linux/mod_devicetable.h"

#define ADD(str, sep, cond, field)                              \
do {                                                            \
        strcat(str, sep);                                       \
        if (cond)                                               \
                sprintf(str + strlen(str),                      \
                        sizeof(field) == 1 ? "%02X" :           \
                        sizeof(field) == 2 ? "%04X" :           \
                        sizeof(field) == 4 ? "%08X" : "",       \
                        field);                                 \
        else                                                    \
                sprintf(str + strlen(str), "*");                \
} while(0)

/* Always end in a wildcard, for future extension */
static inline void add_wildcard(char *str)
{
	int len = strlen(str);

	if (str[len - 1] != '*')
		strcat(str + len, "*");
}

unsigned int cross_build = 0;
/**
 * Check that sizeof(device_id type) are consistent with size of section
 * in .o file. If in-consistent then userspace and kernel does not agree
 * on actual size which is a bug.
 * Also verify that the final entry in the table is all zeros.
 * Ignore both checks if build host differ from target host and size differs.
 **/
static void device_id_check(const char *modname, const char *device_id,
			    unsigned long size, unsigned long id_size,
			    void *symval)
{
	int i;

	if (size % id_size || size < id_size) {
		if (cross_build != 0)
			return;
		fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
		      "of the size of section __mod_%s_device_table=%lu.\n"
		      "Fix definition of struct %s_device_id "
		      "in mod_devicetable.h\n",
		      modname, device_id, id_size, device_id, size, device_id);
	}
	/* Verify last one is a terminator */
	for (i = 0; i < id_size; i++ ) {
		if (*(uint8_t*)(symval+size-id_size+i)) {
			fprintf(stderr,"%s: struct %s_device_id is %lu bytes.  "
				"The last of %lu is:\n",
				modname, device_id, id_size, size / id_size);
			for (i = 0; i < id_size; i++ )
				fprintf(stderr,"0x%02x ",
					*(uint8_t*)(symval+size-id_size+i) );
			fprintf(stderr,"\n");
			fatal("%s: struct %s_device_id is not terminated "
				"with a NULL entry!\n", modname, device_id);
		}
	}
}

/* USB is special because the bcdDevice can be matched against a numeric range */
/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipN" */
static void do_usb_entry(struct usb_device_id *id,
			 unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
			 unsigned char range_lo, unsigned char range_hi,
			 struct module *mod)
{
	char alias[500];
	strcpy(alias, "usb:");
	ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR,
	    id->idVendor);
	ADD(alias, "p", id->match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
	    id->idProduct);

	strcat(alias, "d");
	if (bcdDevice_initial_digits)
		sprintf(alias + strlen(alias), "%0*X",
			bcdDevice_initial_digits, bcdDevice_initial);
	if (range_lo == range_hi)
		sprintf(alias + strlen(alias), "%u", range_lo);
	else if (range_lo > 0 || range_hi < 9)
		sprintf(alias + strlen(alias), "[%u-%u]", range_lo, range_hi);
	if (bcdDevice_initial_digits < (sizeof(id->bcdDevice_lo) * 2 - 1))
		strcat(alias, "*");

	ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
	    id->bDeviceClass);
	ADD(alias, "dsc",
	    id->match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
	    id->bDeviceSubClass);
	ADD(alias, "dp",
	    id->match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
	    id->bDeviceProtocol);
	ADD(alias, "ic",
	    id->match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
	    id->bInterfaceClass);
	ADD(alias, "isc",
	    id->match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
	    id->bInterfaceSubClass);
	ADD(alias, "ip",
	    id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
	    id->bInterfaceProtocol);

	add_wildcard(alias);
	buf_printf(&mod->dev_table_buf,
		   "MODULE_ALIAS(\"%s\");\n", alias);
}

static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod)
{
	unsigned int devlo, devhi;
	unsigned char chi, clo;
	int ndigits;

	id->match_flags = TO_NATIVE(id->match_flags);
	id->idVendor = TO_NATIVE(id->idVendor);
	id->idProduct = TO_NATIVE(id->idProduct);

	devlo = id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
		TO_NATIVE(id->bcdDevice_lo) : 0x0U;
	devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
		TO_NATIVE(id->bcdDevice_hi) : ~0x0U;

	/*
	 * Some modules (visor) have empty slots as placeholder for
	 * run-time specification that results in catch-all alias
	 */
	if (!(id->idVendor | id->idProduct | id->bDeviceClass | id->bInterfaceClass))
		return;

	/* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
	for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
		clo = devlo & 0xf;
		chi = devhi & 0xf;
		if (chi > 9)	/* it's bcd not hex */
			chi = 9;
		devlo >>= 4;
		devhi >>= 4;

		if (devlo == devhi || !ndigits) {
			do_usb_entry(id, devlo, ndigits, clo, chi, mod);
			break;
		}

		if (clo > 0)
			do_usb_entry(id, devlo++, ndigits, clo, 9, mod);

		if (chi < 9)
			do_usb_entry(id, devhi--, ndigits, 0, chi, mod);
	}
}

static void do_usb_table(void *symval, unsigned long size,
			 struct module *mod)
{
	unsigned int i;
	const unsigned long id_size = sizeof(struct usb_device_id);

	device_id_check(mod->name, "usb", size, id_size, symval);

	/* Leave last one: it's the terminator. */
	size -= id_size;

	for (i = 0; i < size; i += id_size)
		do_usb_entry_multi(symval + i, mod);
}

/* Looks like: ieee1394:venNmoNspNverN */
static int do_ieee1394_entry(const char *filename,
			     struct ieee1394_device_id *id, char *alias)
{
	id->match_flags = TO_NATIVE(id->match_flags);
	id->vendor_id = TO_NATIVE(id->vendor_id);
	id->model_id = TO_NATIVE(id->model_id);
	id->specifier_id = TO_NATIVE(id->specifier_id);
	id->version = TO_NATIVE(id->version);

	strcpy(alias, "ieee1394:");
	ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID,
	    id->vendor_id);
	ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID,
	    id->model_id);
	ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID,
	    id->specifier_id);
	ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION,
	    id->version);

	add_wildcard(alias);
	return 1;
}

/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
static int do_pci_entry(const char *filename,
			struct pci_device_id *id, char *alias)
{
	/* Class field can be divided into these three. */
	unsigned char baseclass, subclass, interface,
		baseclass_mask, subclass_mask, interface_mask;

	id->vendor = TO_NATIVE(id->vendor);
	id->device = TO_NATIVE(id->device);
	id->subvendor = TO_NATIVE(id->subvendor);
	id->subdevice = TO_NATIVE(id->subdevice);
	id->class = TO_NATIVE(id->class);
	id->class_mask = TO_NATIVE(id->class_mask);

	strcpy(alias, "pci:");
	ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor);
	ADD(alias, "d", id->device != PCI_ANY_ID, id->device);
	ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor);
	ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice);

	baseclass = (id->class) >> 16;
	baseclass_mask = (id->class_mask) >> 16;
	subclass = (id->class) >> 8;
	subclass_mask = (id->class_mask) >> 8;
	interface = id->class;
	interface_mask = id->class_mask;

	if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
	    || (subclass_mask != 0 && subclass_mask != 0xFF)
	    || (interface_mask != 0 && interface_mask != 0xFF)) {
		warn("Can't handle masks in %s:%04X\n",
		     filename, id->class_mask);
		return 0;
	}

	ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
	ADD(alias, "sc", subclass_mask == 0xFF, subclass);
	ADD(alias, "i", interface_mask == 0xFF, interface);
	add_wildcard(alias);
	return 1;
}

/* looks like: "ccw:tNmNdtNdmN" */
static int do_ccw_entry(const char *filename,
			struct ccw_device_id *id, char *alias)
{
	id->match_flags = TO_NATIVE(id->match_flags);
	id->cu_type = TO_NATIVE(id->cu_type);
	id->cu_model = TO_NATIVE(id->cu_model);
	id->dev_type = TO_NATIVE(id->dev_type);
	id->dev_model = TO_NATIVE(id->dev_model);

	strcpy(alias, "ccw:");
	ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
	    id->cu_type);
	ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
	    id->cu_model);
	ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
	    id->dev_type);
	ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
	    id->dev_model);
	add_wildcard(alias);
	return 1;
}

/* looks like: "ap:tN" */
static int do_ap_entry(const char *filename,
		       struct ap_device_id *id, char *alias)
{
	sprintf(alias, "ap:t%02X*", id->dev_type);
	return 1;
}

/* looks like: "css:tN" */
static int do_css_entry(const char *filename,
			struct css_device_id *id, char *alias)
{
	sprintf(alias, "css:t%01X", id->type);
	return 1;
}

/* Looks like: "serio:tyNprNidNexN" */
static int do_serio_entry(const char *filename,
			  struct serio_device_id *id, char *alias)
{
	id->type = TO_NATIVE(id->type);
	id->proto = TO_NATIVE(id->proto);
	id->id = TO_NATIVE(id->id);
	id->extra = TO_NATIVE(id->extra);

	strcpy(alias, "serio:");
	ADD(alias, "ty", id->type != SERIO_ANY, id->type);
	ADD(alias, "pr", id->proto != SERIO_ANY, id->proto);
	ADD(alias, "id", id->id != SERIO_ANY, id->id);
	ADD(alias, "ex", id->extra != SERIO_ANY, id->extra);

	add_wildcard(alias);
	return 1;
}

/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
static int do_acpi_entry(const char *filename,
			struct acpi_device_id *id, char *alias)
{
	sprintf(alias, "acpi*:%s:*", id->id);
	return 1;
}

/* looks like: "pnp:dD" */
static void do_pnp_device_entry(void *symval, unsigned long size,
				struct module *mod)
{
	const unsigned long id_size = sizeof(struct pnp_device_id);
	const unsigned int count = (size / id_size)-1;
	const struct pnp_device_id *devs = symval;
	unsigned int i;

	device_id_check(mod->name, "pnp", size, id_size, symval);

	for (i = 0; i < count; i++) {
		const char *id = (char *)devs[i].id;

		buf_printf(&mod->dev_table_buf,
			   "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
		buf_printf(&mod->dev_table_buf,
			   "MODULE_ALIAS(\"acpi*:%s:*\");\n", id);
	}
}

/* looks like: "pnp:dD" for every device of the card */
static void do_pnp_card_entries(void *symval, unsigned long size,
				struct module *mod)
{
	const unsigned long id_size = sizeof(struct pnp_card_device_id);
	const unsigned int count = (size / id_size)-1;
	const struct pnp_card_device_id *cards = symval;
	unsigned int i;

	device_id_check(mod->name, "pnp", size, id_size, symval);

	for (i = 0; i < count; i++) {
		unsigned int j;
		const struct pnp_card_device_id *card = &cards[i];

		for (j = 0; j < PNP_MAX_DEVICES; j++) {
			const char *id = (char *)card->devs[j].id;
			int i2, j2;
			int dup = 0;

			if (!id[0])
				break;

			/* find duplicate, already added value */
			for (i2 = 0; i2 < i && !dup; i2++) {
				const struct pnp_card_device_id *card2 = &cards[i2];

				for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
					const char *id2 = (char *)card2->devs[j2].id;

					if (!id2[0])
						break;

					if (!strcmp(id, id2)) {
						dup = 1;
						break;
					}
				}
			}

			/* add an individual alias for every device entry */
			if (!dup) {
				buf_printf(&mod->dev_table_buf,
					   "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
				buf_printf(&mod->dev_table_buf,
					   "MODULE_ALIAS(\"acpi*:%s:*\");\n", id);
			}
		}
	}
}

/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
static int do_pcmcia_entry(const char *filename,
			   struct pcmcia_device_id *id, char *alias)
{
	unsigned int i;

	id->match_flags = TO_NATIVE(id->match_flags);
	id->manf_id = TO_NATIVE(id->manf_id);
	id->card_id = TO_NATIVE(id->card_id);
	id->func_id = TO_NATIVE(id->func_id);
	id->function = TO_NATIVE(id->function);
	id->device_no = TO_NATIVE(id->device_no);

	for (i=0; i<4; i++) {
		id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]);
       }

       strcpy(alias, "pcmcia:");
       ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
	   id->manf_id);
       ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
	   id->card_id);
       ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
	   id->func_id);
       ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
	   id->function);
       ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
	   id->device_no);
       ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]);
       ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]);
       ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]);
       ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]);

	add_wildcard(alias);
       return 1;
}


static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
{
    int len;
    char *tmp;
    len = sprintf (alias, "of:N%sT%s",
                    of->name[0] ? of->name : "*",
                    of->type[0] ? of->type : "*");

    if (of->compatible[0])
        sprintf (&alias[len], "%sC%s",
                     of->type[0] ? "*" : "",
                     of->compatible);

    /* Replace all whitespace with underscores */
    for (tmp = alias; tmp && *tmp; tmp++)
        if (isspace (*tmp))
            *tmp = '_';

    add_wildcard(alias);
    return 1;
}

static int do_vio_entry(const char *filename, struct vio_device_id *vio,
		char *alias)
{
	char *tmp;

	sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*",
			vio->compat[0] ? vio->compat : "*");

	/* Replace all whitespace with underscores */
	for (tmp = alias; tmp && *tmp; tmp++)
		if (isspace (*tmp))
			*tmp = '_';

	add_wildcard(alias);
	return 1;
}

#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))

static void do_input(char *alias,
		     kernel_ulong_t *arr, unsigned int min, unsigned int max)
{
	unsigned int i;

	for (i = min; i < max; i++)
		if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
			sprintf(alias + strlen(alias), "%X,*", i);
}

/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
static int do_input_entry(const char *filename, struct input_device_id *id,
			  char *alias)
{
	sprintf(alias, "input:");

	ADD(alias, "b", id->flags & INPUT_DEVICE_ID_MATCH_BUS, id->bustype);
	ADD(alias, "v", id->flags & INPUT_DEVICE_ID_MATCH_VENDOR, id->vendor);
	ADD(alias, "p", id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT, id->product);
	ADD(alias, "e", id->flags & INPUT_DEVICE_ID_MATCH_VERSION, id->version);

	sprintf(alias + strlen(alias), "-e*");
	if (id->flags & INPUT_DEVICE_ID_MATCH_EVBIT)
		do_input(alias, id->evbit, 0, INPUT_DEVICE_ID_EV_MAX);
	sprintf(alias + strlen(alias), "k*");
	if (id->flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
		do_input(alias, id->keybit,
			 INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
			 INPUT_DEVICE_ID_KEY_MAX);
	sprintf(alias + strlen(alias), "r*");
	if (id->flags & INPUT_DEVICE_ID_MATCH_RELBIT)
		do_input(alias, id->relbit, 0, INPUT_DEVICE_ID_REL_MAX);
	sprintf(alias + strlen(alias), "a*");
	if (id->flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
		do_input(alias, id->absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
	sprintf(alias + strlen(alias), "m*");
	if (id->flags & INPUT_DEVICE_ID_MATCH_MSCIT)
		do_input(alias, id->mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
	sprintf(alias + strlen(alias), "l*");
	if (id->flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
		do_input(alias, id->ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
	sprintf(alias + strlen(alias), "s*");
	if (id->flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
		do_input(alias, id->sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
	sprintf(alias + strlen(alias), "f*");
	if (id->flags & INPUT_DEVICE_ID_MATCH_FFBIT)
		do_input(alias, id->ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
	sprintf(alias + strlen(alias), "w*");
	if (id->flags & INPUT_DEVICE_ID_MATCH_SWBIT)
		do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX);
	return 1;
}

static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa,
		char *alias)
{
	if (eisa->sig[0])
		sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", eisa->sig);
	else
		strcat(alias, "*");
	return 1;
}

/* Looks like: parisc:tNhvNrevNsvN */
static int do_parisc_entry(const char *filename, struct parisc_device_id *id,
		char *alias)
{
	id->hw_type = TO_NATIVE(id->hw_type);
	id->hversion = TO_NATIVE(id->hversion);
	id->hversion_rev = TO_NATIVE(id->hversion_rev);
	id->sversion = TO_NATIVE(id->sversion);

	strcpy(alias, "parisc:");
	ADD(alias, "t", id->hw_type != PA_HWTYPE_ANY_ID, id->hw_type);
	ADD(alias, "hv", id->hversion != PA_HVERSION_ANY_ID, id->hversion);
	ADD(alias, "rev", id->hversion_rev != PA_HVERSION_REV_ANY_ID, id->hversion_rev);
	ADD(alias, "sv", id->sversion != PA_SVERSION_ANY_ID, id->sversion);

	add_wildcard(alias);
	return 1;
}

/* Looks like: sdio:cNvNdN. */
static int do_sdio_entry(const char *filename,
			struct sdio_device_id *id, char *alias)
{
	id->class = TO_NATIVE(id->class);
	id->vendor = TO_NATIVE(id->vendor);
	id->device = TO_NATIVE(id->device);

	strcpy(alias, "sdio:");
	ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class);
	ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor);
	ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device);
	add_wildcard(alias);
	return 1;
}

/* Looks like: ssb:vNidNrevN. */
static int do_ssb_entry(const char *filename,
			struct ssb_device_id *id, char *alias)
{
	id->vendor = TO_NATIVE(id->vendor);
	id->coreid = TO_NATIVE(id->coreid);
	id->revision = TO_NATIVE(id->revision);

	strcpy(alias, "ssb:");
	ADD(alias, "v", id->vendor != SSB_ANY_VENDOR, id->vendor);
	ADD(alias, "id", id->coreid != SSB_ANY_ID, id->coreid);
	ADD(alias, "rev", id->revision != SSB_ANY_REV, id->revision);
	add_wildcard(alias);
	return 1;
}

/* Looks like: virtio:dNvN */
static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
			   char *alias)
{
	id->device = TO_NATIVE(id->device);
	id->vendor = TO_NATIVE(id->vendor);

	strcpy(alias, "virtio:");
	ADD(alias, "d", 1, id->device);
	ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor);

	add_wildcard(alias);
	return 1;
}

/* Looks like: i2c:S */
static int do_i2c_entry(const char *filename, struct i2c_device_id *id,
			char *alias)
{
	sprintf(alias, I2C_MODULE_PREFIX "%s", id->name);

	return 1;
}

/* Ignore any prefix, eg. some architectures prepend _ */
static inline int sym_is(const char *symbol, const char *name)
{
	const char *match;

	match = strstr(symbol, name);
	if (!match)
		return 0;
	return match[strlen(symbol)] == '\0';
}

static void do_table(void *symval, unsigned long size,
		     unsigned long id_size,
		     const char *device_id,
		     void *function,
		     struct module *mod)
{
	unsigned int i;
	char alias[500];
	int (*do_entry)(const char *, void *entry, char *alias) = function;

	device_id_check(mod->name, device_id, size, id_size, symval);
	/* Leave last one: it's the terminator. */
	size -= id_size;

	for (i = 0; i < size; i += id_size) {
		if (do_entry(mod->name, symval+i, alias)) {
			buf_printf(&mod->dev_table_buf,
				   "MODULE_ALIAS(\"%s\");\n", alias);
		}
	}
}

/* Create MODULE_ALIAS() statements.
 * At this time, we cannot write the actual output C source yet,
 * so we write into the mod->dev_table_buf buffer. */
void handle_moddevtable(struct module *mod, struct elf_info *info,
			Elf_Sym *sym, const char *symname)
{
	void *symval;
	char *zeros = NULL;

	/* We're looking for a section relative symbol */
	if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum)
		return;

	/* Handle all-NULL symbols allocated into .bss */
	if (info->sechdrs[sym->st_shndx].sh_type & SHT_NOBITS) {
		zeros = calloc(1, sym->st_size);
		symval = zeros;
	} else {
		symval = (void *)info->hdr
			+ info->sechdrs[sym->st_shndx].sh_offset
			+ sym->st_value;
	}

	if (sym_is(symname, "__mod_pci_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct pci_device_id), "pci",
			 do_pci_entry, mod);
	else if (sym_is(symname, "__mod_usb_device_table"))
		/* special case to handle bcdDevice ranges */
		do_usb_table(symval, sym->st_size, mod);
	else if (sym_is(symname, "__mod_ieee1394_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct ieee1394_device_id), "ieee1394",
			 do_ieee1394_entry, mod);
	else if (sym_is(symname, "__mod_ccw_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct ccw_device_id), "ccw",
			 do_ccw_entry, mod);
	else if (sym_is(symname, "__mod_ap_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct ap_device_id), "ap",
			 do_ap_entry, mod);
	else if (sym_is(symname, "__mod_css_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct css_device_id), "css",
			 do_css_entry, mod);
	else if (sym_is(symname, "__mod_serio_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct serio_device_id), "serio",
			 do_serio_entry, mod);
	else if (sym_is(symname, "__mod_acpi_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct acpi_device_id), "acpi",
			 do_acpi_entry, mod);
	else if (sym_is(symname, "__mod_pnp_device_table"))
		do_pnp_device_entry(symval, sym->st_size, mod);
	else if (sym_is(symname, "__mod_pnp_card_device_table"))
		do_pnp_card_entries(symval, sym->st_size, mod);
	else if (sym_is(symname, "__mod_pcmcia_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct pcmcia_device_id), "pcmcia",
			 do_pcmcia_entry, mod);
        else if (sym_is(symname, "__mod_of_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct of_device_id), "of",
			 do_of_entry, mod);
        else if (sym_is(symname, "__mod_vio_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct vio_device_id), "vio",
			 do_vio_entry, mod);
	else if (sym_is(symname, "__mod_input_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct input_device_id), "input",
			 do_input_entry, mod);
	else if (sym_is(symname, "__mod_eisa_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct eisa_device_id), "eisa",
			 do_eisa_entry, mod);
	else if (sym_is(symname, "__mod_parisc_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct parisc_device_id), "parisc",
			 do_parisc_entry, mod);
	else if (sym_is(symname, "__mod_sdio_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct sdio_device_id), "sdio",
			 do_sdio_entry, mod);
	else if (sym_is(symname, "__mod_ssb_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct ssb_device_id), "ssb",
			 do_ssb_entry, mod);
	else if (sym_is(symname, "__mod_virtio_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct virtio_device_id), "virtio",
			 do_virtio_entry, mod);
	else if (sym_is(symname, "__mod_i2c_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct i2c_device_id), "i2c",
			 do_i2c_entry, mod);
	free(zeros);
}

/* Now add out buffered information to the generated C source */
void add_moddevtable(struct buffer *buf, struct module *mod)
{
	buf_printf(buf, "\n");
	buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
	free(mod->dev_table_buf.p);
}