file2alias.c

linux 内核源代码

/* 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]);

       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 = '_';

    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 = '_';

	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);
	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);

	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);
	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);
	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);

	return 1;
}

/* Ignore any prefix, eg. v850 prepends _ */
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)) {
			/* Always end in a wildcard, for future extension */
			if (alias[strlen(alias)-1] != '*')
				strcat(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_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_table(symval, sym->st_size,
			 sizeof(struct pnp_device_id), "pnp",
			 do_pnp_entry, mod);
	else if (sym_is(symname, "__mod_pnp_card_device_table"))
		do_table(symval, sym->st_size,
			 sizeof(struct pnp_card_device_id), "pnp_card",
			 do_pnp_card_entry, 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);
	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);
}