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626596e295
kernel_optimize_test/scripts/mod/file2alias.c
Rusty Russell 626596e295 modpost: use a table rather than a giant if/else statement. 
We look for symbols of form __mod_<busname>_device_table, and for all
but three cases we use a standard interation function (do_table) to
walk over the contents and dump out the aliases.

Alessandro Rubini did this first, I just repainted the bikeshed a bit.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Alessandro Rubini <rubini@gnudd.com>
2012-01-13 09:32:15 +10:30

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/* 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>
#include <stdbool.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,
unsigned char max, 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), "%X", range_lo);
else if (range_lo > 0 || range_hi < max) {
if (range_lo > 0x9 || range_hi < 0xA)
sprintf(alias + strlen(alias),
"[%X-%X]",
range_lo,
range_hi);
else {
sprintf(alias + strlen(alias),
range_lo < 0x9 ? "[%X-9" : "[%X",
range_lo);
sprintf(alias + strlen(alias),
range_hi > 0xA ? "a-%X]" : "%X]",
range_lo);
}
}
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);
}
/* Handles increment/decrement of BCD formatted integers */
/* Returns the previous value, so it works like i++ or i-- */
static unsigned int incbcd(unsigned int *bcd,
int inc,
unsigned char max,
size_t chars)
{
unsigned int init = *bcd, i, j;
unsigned long long c, dec = 0;
/* If bcd is not in BCD format, just increment */
if (max > 0x9) {
*bcd += inc;
return init;
}
/* Convert BCD to Decimal */
for (i=0 ; i < chars ; i++) {
c = (*bcd >> (i << 2)) & 0xf;
c = c > 9 ? 9 : c; /* force to bcd just in case */
for (j=0 ; j < i ; j++)
c = c * 10;
dec += c;
}
/* Do our increment/decrement */
dec += inc;
*bcd = 0;
/* Convert back to BCD */
for (i=0 ; i < chars ; i++) {
for (c=1,j=0 ; j < i ; j++)
c = c * 10;
c = (dec / c) % 10;
*bcd += c << (i << 2);
}
return init;
}
static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod)
{
unsigned int devlo, devhi;
unsigned char chi, clo, max;
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;
/* Figure out if this entry is in bcd or hex format */
max = 0x9; /* Default to decimal format */
for (ndigits = 0 ; ndigits < sizeof(id->bcdDevice_lo) * 2 ; ndigits++) {
clo = (devlo >> (ndigits << 2)) & 0xf;
chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
if (clo > max || chi > max) {
max = 0xf;
break;
}
}
/*
* 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 > max) /* If we are in bcd mode, truncate if necessary */
chi = max;
devlo >>= 4;
devhi >>= 4;
if (devlo == devhi || !ndigits) {
do_usb_entry(id, devlo, ndigits, clo, chi, max, mod);
break;
}
if (clo > 0x0)
do_usb_entry(id,
incbcd(&devlo, 1, max,
sizeof(id->bcdDevice_lo) * 2),
ndigits, clo, max, max, mod);
if (chi < max)
do_usb_entry(id,
incbcd(&devhi, -1, max,
sizeof(id->bcdDevice_lo) * 2),
ndigits, 0x0, chi, max, 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: hid:bNvNpN */
static int do_hid_entry(const char *filename,
struct hid_device_id *id, char *alias)
{
id->bus = TO_NATIVE(id->bus);
id->vendor = TO_NATIVE(id->vendor);
id->product = TO_NATIVE(id->product);
sprintf(alias, "hid:b%04X", id->bus);
ADD(alias, "v", id->vendor != HID_ANY_ID, id->vendor);
ADD(alias, "p", id->product != HID_ANY_ID, id->product);
return 1;
}
/* 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;
char acpi_id[sizeof(devs[0].id)];
int j;
buf_printf(&mod->dev_table_buf,
"MODULE_ALIAS(\"pnp:d%s*\");\n", id);
/* fix broken pnp bus lowercasing */
for (j = 0; j < sizeof(acpi_id); j++)
acpi_id[j] = toupper(id[j]);
buf_printf(&mod->dev_table_buf,
"MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_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) {
char acpi_id[sizeof(card->devs[0].id)];
int k;
buf_printf(&mod->dev_table_buf,
"MODULE_ALIAS(\"pnp:d%s*\");\n", id);
/* fix broken pnp bus lowercasing */
for (k = 0; k < sizeof(acpi_id); k++)
acpi_id[k] = toupper(id[k]);
buf_printf(&mod->dev_table_buf,
"MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_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: bcma:mNidNrevNclN. */
static int do_bcma_entry(const char *filename,
struct bcma_device_id *id, char *alias)
{
id->manuf = TO_NATIVE(id->manuf);
id->id = TO_NATIVE(id->id);
id->rev = TO_NATIVE(id->rev);
id->class = TO_NATIVE(id->class);
strcpy(alias, "bcma:");
ADD(alias, "m", id->manuf != BCMA_ANY_MANUF, id->manuf);
ADD(alias, "id", id->id != BCMA_ANY_ID, id->id);
ADD(alias, "rev", id->rev != BCMA_ANY_REV, id->rev);
ADD(alias, "cl", id->class != BCMA_ANY_CLASS, id->class);
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", id->device != VIRTIO_DEV_ANY_ID, id->device);
ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor);
add_wildcard(alias);
return 1;
}
/*
* Looks like: vmbus:guid
* Each byte of the guid will be represented by two hex characters
* in the name.
*/
static int do_vmbus_entry(const char *filename, struct hv_vmbus_device_id *id,
char *alias)
{
int i;
char guid_name[((sizeof(id->guid) + 1)) * 2];
for (i = 0; i < (sizeof(id->guid) * 2); i += 2)
sprintf(&guid_name[i], "%02x", id->guid[i/2]);
strcpy(alias, "vmbus:");
strcat(alias, guid_name);
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;
}
/* Looks like: spi:S */
static int do_spi_entry(const char *filename, struct spi_device_id *id,
char *alias)
{
sprintf(alias, SPI_MODULE_PREFIX "%s", id->name);
return 1;
}
static const struct dmifield {
const char *prefix;
int field;
} dmi_fields[] = {
{ "bvn", DMI_BIOS_VENDOR },
{ "bvr", DMI_BIOS_VERSION },
{ "bd", DMI_BIOS_DATE },
{ "svn", DMI_SYS_VENDOR },
{ "pn", DMI_PRODUCT_NAME },
{ "pvr", DMI_PRODUCT_VERSION },
{ "rvn", DMI_BOARD_VENDOR },
{ "rn", DMI_BOARD_NAME },
{ "rvr", DMI_BOARD_VERSION },
{ "cvn", DMI_CHASSIS_VENDOR },
{ "ct", DMI_CHASSIS_TYPE },
{ "cvr", DMI_CHASSIS_VERSION },
{ NULL, DMI_NONE }
};
static void dmi_ascii_filter(char *d, const char *s)
{
/* Filter out characters we don't want to see in the modalias string */
for (; *s; s++)
if (*s > ' ' && *s < 127 && *s != ':')
*(d++) = *s;
*d = 0;
}
static int do_dmi_entry(const char *filename, struct dmi_system_id *id,
char *alias)
{
int i, j;
sprintf(alias, "dmi*");
for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
for (j = 0; j < 4; j++) {
if (id->matches[j].slot &&
id->matches[j].slot == dmi_fields[i].field) {
sprintf(alias + strlen(alias), ":%s*",
dmi_fields[i].prefix);
dmi_ascii_filter(alias + strlen(alias),
id->matches[j].substr);
strcat(alias, "*");
}
}
}
strcat(alias, ":");
return 1;
}
static int do_platform_entry(const char *filename,
struct platform_device_id *id, char *alias)
{
sprintf(alias, PLATFORM_MODULE_PREFIX "%s", id->name);
return 1;
}
static int do_mdio_entry(const char *filename,
struct mdio_device_id *id, char *alias)
{
int i;
alias += sprintf(alias, MDIO_MODULE_PREFIX);
for (i = 0; i < 32; i++) {
if (!((id->phy_id_mask >> (31-i)) & 1))
*(alias++) = '?';
else if ((id->phy_id >> (31-i)) & 1)
*(alias++) = '1';
else
*(alias++) = '0';
}
/* Terminate the string */
*alias = 0;
return 1;
}
/* Looks like: zorro:iN. */
static int do_zorro_entry(const char *filename, struct zorro_device_id *id,
char *alias)
{
id->id = TO_NATIVE(id->id);
strcpy(alias, "zorro:");
ADD(alias, "i", id->id != ZORRO_WILDCARD, id->id);
return 1;
}
/* looks like: "pnp:dD" */
static int do_isapnp_entry(const char *filename,
struct isapnp_device_id *id, char *alias)
{
sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
'A' + ((id->vendor >> 2) & 0x3f) - 1,
'A' + (((id->vendor & 3) << 3) | ((id->vendor >> 13) & 7)) - 1,
'A' + ((id->vendor >> 8) & 0x1f) - 1,
(id->function >> 4) & 0x0f, id->function & 0x0f,
(id->function >> 12) & 0x0f, (id->function >> 8) & 0x0f);
return 1;
}
/*
* Append a match expression for a single masked hex digit.
* outp points to a pointer to the character at which to append.
* *outp is updated on return to point just after the appended text,
* to facilitate further appending.
*/
static void append_nibble_mask(char **outp,
unsigned int nibble, unsigned int mask)
{
char *p = *outp;
unsigned int i;
switch (mask) {
case 0:
*p++ = '?';
break;
case 0xf:
p += sprintf(p, "%X", nibble);
break;
default:
/*
* Dumbly emit a match pattern for all possible matching
* digits. This could be improved in some cases using ranges,
* but it has the advantage of being trivially correct, and is
* often optimal.
*/
*p++ = '[';
for (i = 0; i < 0x10; i++)
if ((i & mask) == nibble)
p += sprintf(p, "%X", i);
*p++ = ']';
}
/* Ensure that the string remains NUL-terminated: */
*p = '\0';
/* Advance the caller's end-of-string pointer: */
*outp = p;
}
/*
* looks like: "amba:dN"
*
* N is exactly 8 digits, where each is an upper-case hex digit, or
* a ? or [] pattern matching exactly one digit.
*/
static int do_amba_entry(const char *filename,
struct amba_id *id, char *alias)
{
unsigned int digit;
char *p = alias;
if ((id->id & id->mask) != id->id)
fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: "
"id=0x%08X, mask=0x%08X. Please fix this driver.\n",
filename, id->id, id->mask);
p += sprintf(alias, "amba:d");
for (digit = 0; digit < 8; digit++)
append_nibble_mask(&p,
(id->id >> (4 * (7 - digit))) & 0xf,
(id->mask >> (4 * (7 - digit))) & 0xf);
return 1;
}
/* Does namelen bytes of name exactly match the symbol? */
static bool sym_is(const char *name, unsigned namelen, const char *symbol)
{
if (namelen != strlen(symbol))
return false;
return memcmp(name, symbol, namelen) == 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);
}
}
}
/* This array collects all instances that use the generic do_table above */
struct devtable_switch {
const char *device_id; /* name of table, __mod_<name>_device_table. */
unsigned long id_size;
void *function;
};
static const struct devtable_switch devtable_switch[] = {
{ "acpi", sizeof(struct acpi_device_id), do_acpi_entry },
{ "amba", sizeof(struct amba_id), do_amba_entry },
{ "ap", sizeof(struct ap_device_id), do_ap_entry },
{ "bcma", sizeof(struct bcma_device_id), do_bcma_entry },
{ "ccw", sizeof(struct ccw_device_id), do_ccw_entry },
{ "css", sizeof(struct css_device_id), do_css_entry },
{ "dmi", sizeof(struct dmi_system_id), do_dmi_entry },
{ "eisa", sizeof(struct eisa_device_id), do_eisa_entry },
{ "hid", sizeof(struct hid_device_id), do_hid_entry },
{ "i2c", sizeof(struct i2c_device_id), do_i2c_entry },
{ "ieee1394", sizeof(struct ieee1394_device_id), do_ieee1394_entry },
{ "input", sizeof(struct input_device_id), do_input_entry },
{ "isa", sizeof(struct isapnp_device_id), do_isapnp_entry },
{ "mdio", sizeof(struct mdio_device_id), do_mdio_entry },
{ "of", sizeof(struct of_device_id), do_of_entry },
{ "parisc", sizeof(struct parisc_device_id), do_parisc_entry },
{ "pci", sizeof(struct pci_device_id), do_pci_entry },
{ "pcmcia", sizeof(struct pcmcia_device_id), do_pcmcia_entry },
{ "platform", sizeof(struct platform_device_id), do_platform_entry },
{ "sdio", sizeof(struct sdio_device_id), do_sdio_entry },
{ "serio", sizeof(struct serio_device_id), do_serio_entry },
{ "spi", sizeof(struct spi_device_id), do_spi_entry },
{ "ssb", sizeof(struct ssb_device_id), do_ssb_entry },
{ "vio", sizeof(struct vio_device_id), do_vio_entry },
{ "virtio", sizeof(struct virtio_device_id), do_virtio_entry },
{ "vmbus", sizeof(struct hv_vmbus_device_id), do_vmbus_entry },
{ "zorro", sizeof(struct zorro_device_id), do_zorro_entry },
};
/* 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;
const char *name;
unsigned int namelen;
/* We're looking for a section relative symbol */
if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
return;
/* All our symbols are of form <prefix>__mod_XXX_device_table. */
name = strstr(symname, "__mod_");
if (!name)
return;
name += strlen("__mod_");
namelen = strlen(name);
if (namelen < strlen("_device_table"))
return;
if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
return;
namelen -= strlen("_device_table");
/* Handle all-NULL symbols allocated into .bss */
if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
zeros = calloc(1, sym->st_size);
symval = zeros;
} else {
symval = (void *)info->hdr
+ info->sechdrs[get_secindex(info, sym)].sh_offset
+ sym->st_value;
}
/* First handle the "special" cases */
if (sym_is(name, namelen, "usb"))
do_usb_table(symval, sym->st_size, mod);
else if (sym_is(name, namelen, "pnp"))
do_pnp_device_entry(symval, sym->st_size, mod);
else if (sym_is(name, namelen, "pnp_card"))
do_pnp_card_entries(symval, sym->st_size, mod);
else {
const struct devtable_switch *p = devtable_switch;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(devtable_switch); i++, p++) {
if (sym_is(name, namelen, p->device_id)) {
do_table(symval, sym->st_size, p->id_size,
p->device_id, p->function, mod);
break;
}
}
}
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);
}
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