/* 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"
#include "devicetable-offsets.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"
/* This array collects all instances that use the generic do_table */
struct devtable {
const char *device_id; /* name of table, __mod_<name>__*_device_table. */
unsigned long id_size;
void *function;
};
#define ___cat(a,b) a ## b
#define __cat(a,b) ___cat(a,b)
/* we need some special handling for this host tool running eventually on
* Darwin. The Mach-O section handling is a bit different than ELF section
* handling. The differnces in detail are:
* a) we have segments which have sections
* b) we need a API call to get the respective section symbols */
#if defined(__MACH__)
#include <mach-o/getsect.h>
#define INIT_SECTION(name) do { \
unsigned long name ## _len; \
char *__cat(pstart_,name) = getsectdata("__TEXT", \
#name, &__cat(name,_len)); \
char *__cat(pstop_,name) = __cat(pstart_,name) + \
__cat(name, _len); \
__cat(__start_,name) = (void *)__cat(pstart_,name); \
__cat(__stop_,name) = (void *)__cat(pstop_,name); \
} while (0)
#define SECTION(name) __attribute__((section("__TEXT, " #name)))
struct devtable **__start___devtable, **__stop___devtable;
#else
#define INIT_SECTION(name) /* no-op for ELF */
#define SECTION(name) __attribute__((section(#name)))
/* We construct a table of pointers in an ELF section (pointers generally
* go unpadded by gcc). ld creates boundary syms for us. */
extern struct devtable *__start___devtable[], *__stop___devtable[];
#endif /* __MACH__ */
#if !defined(__used)
# if __GNUC__ == 3 && __GNUC_MINOR__ < 3
# define __used __attribute__((__unused__))
# else
# define __used __attribute__((__used__))
# endif
#endif
/* Define a variable f that holds the value of field f of struct devid
* based at address m.
*/
#define DEF_FIELD(m, devid, f) \
typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))
/* Define a variable f that holds the address of field f of struct devid
* based at address m. Due to the way typeof works, for a field of type
* T[N] the variable has type T(*)[N], _not_ T*.
*/
#define DEF_FIELD_ADDR(m, devid, f) \
typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f)
/* Add a table entry. We test function type matches while we're here. */
#define ADD_TO_DEVTABLE(device_id, type, function) \
static struct devtable __cat(devtable,__LINE__) = { \
device_id + 0*sizeof((function)((const char *)NULL, \
(void *)NULL, \
(char *)NULL)), \
SIZE_##type, (function) }; \
static struct devtable *SECTION(__devtable) __used \
__cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__)
#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, "*");
}
/**
* 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) {
fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
"of the size of "
"section __mod_%s__<identifier>_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:vNpNdNdcNdscNdpNicNiscNipNinN" */
static void 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)
{
char alias[500];
DEF_FIELD(symval, usb_device_id, match_flags);
DEF_FIELD(symval, usb_device_id, idVendor);
DEF_FIELD(symval, usb_device_id, idProduct);
DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
DEF_FIELD(symval, usb_device_id, bDeviceClass);
DEF_FIELD(symval, usb_device_id, bDeviceSubClass);
DEF_FIELD(symval, usb_device_id, bDeviceProtocol);
DEF_FIELD(symval, usb_device_id, bInterfaceClass);
DEF_FIELD(symval, usb_device_id, bInterfaceSubClass);
DEF_FIELD(symval, usb_device_id, bInterfaceProtocol);
DEF_FIELD(symval, usb_device_id, bInterfaceNumber);
strcpy(alias, "usb:");
ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR,
idVendor);
ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
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_hi);
}
}
if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1))
strcat(alias, "*");
ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
bDeviceClass);
ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
bDeviceSubClass);
ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
bDeviceProtocol);
ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
bInterfaceClass);
ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
bInterfaceSubClass);
ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
bInterfaceProtocol);
ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
bInterfaceNumber);
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(void *symval, struct module *mod)
{
unsigned int devlo, devhi;
unsigned char chi, clo, max;
int ndigits;
DEF_FIELD(symval, usb_device_id, match_flags);
DEF_FIELD(symval, usb_device_id, idVendor);
DEF_FIELD(symval, usb_device_id, idProduct);
DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
DEF_FIELD(symval, usb_device_id, bcdDevice_hi);
DEF_FIELD(symval, usb_device_id, bDeviceClass);
DEF_FIELD(symval, usb_device_id, bInterfaceClass);
devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
bcdDevice_lo : 0x0U;
devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
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(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 (!(idVendor | idProduct | bDeviceClass | bInterfaceClass))
return;
/* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
for (ndigits = sizeof(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(symval, devlo, ndigits, clo, chi, max, mod);
break;
}
if (clo > 0x0)
do_usb_entry(symval,
incbcd(&devlo, 1, max,
sizeof(bcdDevice_lo) * 2),
ndigits, clo, max, max, mod);
if (chi < max)
do_usb_entry(symval,
incbcd(&devhi, -1, max,
sizeof(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 = SIZE_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,
void *symval, char *alias)
{
DEF_FIELD(symval, hid_device_id, bus);
DEF_FIELD(symval, hid_device_id, group);
DEF_FIELD(symval, hid_device_id, vendor);
DEF_FIELD(symval, hid_device_id, product);
sprintf(alias, "hid:");
ADD(alias, "b", bus != HID_BUS_ANY, bus);
ADD(alias, "g", group != HID_GROUP_ANY, group);
ADD(alias, "v", vendor != HID_ANY_ID, vendor);
ADD(alias, "p", product != HID_ANY_ID, product);
return 1;
}
ADD_TO_DEVTABLE("hid", hid_device_id, do_hid_entry);
/* Looks like: ieee1394:venNmoNspNverN */
static int do_ieee1394_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD(symval, ieee1394_device_id, match_flags);
DEF_FIELD(symval, ieee1394_device_id, vendor_id);
DEF_FIELD(symval, ieee1394_device_id, model_id);
DEF_FIELD(symval, ieee1394_device_id, specifier_id);
DEF_FIELD(symval, ieee1394_device_id, version);
strcpy(alias, "ieee1394:");
ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID,
vendor_id);
ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID,
model_id);
ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID,
specifier_id);
ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION,
version);
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("ieee1394", ieee1394_device_id, do_ieee1394_entry);
/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
static int do_pci_entry(const char *filename,
void *symval, char *alias)
{
/* Class field can be divided into these three. */
unsigned char baseclass, subclass, interface,
baseclass_mask, subclass_mask, interface_mask;
DEF_FIELD(symval, pci_device_id, vendor);
DEF_FIELD(symval, pci_device_id, device);
DEF_FIELD(symval, pci_device_id, subvendor);
DEF_FIELD(symval, pci_device_id, subdevice);
DEF_FIELD(symval, pci_device_id, class);
DEF_FIELD(symval, pci_device_id, class_mask);
strcpy(alias, "pci:");
ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
ADD(alias, "d", device != PCI_ANY_ID, device);
ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);
baseclass = (class) >> 16;
baseclass_mask = (class_mask) >> 16;
subclass = (class) >> 8;
subclass_mask = (class_mask) >> 8;
interface = class;
interface_mask = 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, 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;
}
ADD_TO_DEVTABLE("pci", pci_device_id, do_pci_entry);
/* looks like: "ccw:tNmNdtNdmN" */
static int do_ccw_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD(symval, ccw_device_id, match_flags);
DEF_FIELD(symval, ccw_device_id, cu_type);
DEF_FIELD(symval, ccw_device_id, cu_model);
DEF_FIELD(symval, ccw_device_id, dev_type);
DEF_FIELD(symval, ccw_device_id, dev_model);
strcpy(alias, "ccw:");
ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
cu_type);
ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
cu_model);
ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
dev_type);
ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
dev_model);
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("ccw", ccw_device_id, do_ccw_entry);
/* looks like: "ap:tN" */
static int do_ap_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD(symval, ap_device_id, dev_type);
sprintf(alias, "ap:t%02X*", dev_type);
return 1;
}
ADD_TO_DEVTABLE("ap", ap_device_id, do_ap_entry);
/* looks like: "css:tN" */
static int do_css_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD(symval, css_device_id, type);
sprintf(alias, "css:t%01X", type);
return 1;
}
ADD_TO_DEVTABLE("css", css_device_id, do_css_entry);
/* Looks like: "serio:tyNprNidNexN" */
static int do_serio_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD(symval, serio_device_id, type);
DEF_FIELD(symval, serio_device_id, proto);
DEF_FIELD(symval, serio_device_id, id);
DEF_FIELD(symval, serio_device_id, extra);
strcpy(alias, "serio:");
ADD(alias, "ty", type != SERIO_ANY, type);
ADD(alias, "pr", proto != SERIO_ANY, proto);
ADD(alias, "id", id != SERIO_ANY, id);
ADD(alias, "ex", extra != SERIO_ANY, extra);
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("serio", serio_device_id, do_serio_entry);
/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
static int do_acpi_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD_ADDR(symval, acpi_device_id, id);
sprintf(alias, "acpi*:%s:*", *id);
return 1;
}
ADD_TO_DEVTABLE("acpi", acpi_device_id, do_acpi_entry);
/* looks like: "pnp:dD" */
static void do_pnp_device_entry(void *symval, unsigned long size,
struct module *mod)
{
const unsigned long id_size = SIZE_pnp_device_id;
const unsigned int count = (size / id_size)-1;
unsigned int i;
device_id_check(mod->name, "pnp", size, id_size, symval);
for (i = 0; i < count; i++) {
DEF_FIELD_ADDR(symval + i*id_size, pnp_device_id, id);
char acpi_id[sizeof(*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 = SIZE_pnp_card_device_id;
const unsigned int count = (size / id_size)-1;
unsigned int i;
device_id_check(mod->name, "pnp", size, id_size, symval);
for (i = 0; i < count; i++) {
unsigned int j;
DEF_FIELD_ADDR(symval + i*id_size, pnp_card_device_id, devs);
for (j = 0; j < PNP_MAX_DEVICES; j++) {
const char *id = (char *)(*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++) {
DEF_FIELD_ADDR(symval + i2*id_size, pnp_card_device_id, devs);
for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
const char *id2 = (char *)(*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[PNP_ID_LEN];
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,
void *symval, char *alias)
{
unsigned int i;
DEF_FIELD(symval, pcmcia_device_id, match_flags);
DEF_FIELD(symval, pcmcia_device_id, manf_id);
DEF_FIELD(symval, pcmcia_device_id, card_id);
DEF_FIELD(symval, pcmcia_device_id, func_id);
DEF_FIELD(symval, pcmcia_device_id, function);
DEF_FIELD(symval, pcmcia_device_id, device_no);
DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
for (i=0; i<4; i++) {
(*prod_id_hash)[i] = TO_NATIVE((*prod_id_hash)[i]);
}
strcpy(alias, "pcmcia:");
ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
manf_id);
ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
card_id);
ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
func_id);
ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
function);
ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
device_no);
ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, (*prod_id_hash)[0]);
ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, (*prod_id_hash)[1]);
ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, (*prod_id_hash)[2]);
ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, (*prod_id_hash)[3]);
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("pcmcia", pcmcia_device_id, do_pcmcia_entry);
static int do_of_entry (const char *filename, void *symval, char *alias)
{
int len;
char *tmp;
DEF_FIELD_ADDR(symval, of_device_id, name);
DEF_FIELD_ADDR(symval, of_device_id, type);
DEF_FIELD_ADDR(symval, of_device_id, compatible);
len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*",
(*type)[0] ? *type : "*");
if (compatible[0])
sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "",
*compatible);
/* Replace all whitespace with underscores */
for (tmp = alias; tmp && *tmp; tmp++)
if (isspace (*tmp))
*tmp = '_';
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("of", of_device_id, do_of_entry);
static int do_vio_entry(const char *filename, void *symval,
char *alias)
{
char *tmp;
DEF_FIELD_ADDR(symval, vio_device_id, type);
DEF_FIELD_ADDR(symval, vio_device_id, compat);
sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
(*compat)[0] ? *compat : "*");
/* Replace all whitespace with underscores */
for (tmp = alias; tmp && *tmp; tmp++)
if (isspace (*tmp))
*tmp = '_';
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("vio", vio_device_id, do_vio_entry);
#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 / BITS_PER_LONG; i < max / BITS_PER_LONG + 1; i++)
arr[i] = TO_NATIVE(arr[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, void *symval,
char *alias)
{
DEF_FIELD(symval, input_device_id, flags);
DEF_FIELD(symval, input_device_id, bustype);
DEF_FIELD(symval, input_device_id, vendor);
DEF_FIELD(symval, input_device_id, product);
DEF_FIELD(symval, input_device_id, version);
DEF_FIELD_ADDR(symval, input_device_id, evbit);
DEF_FIELD_ADDR(symval, input_device_id, keybit);
DEF_FIELD_ADDR(symval, input_device_id, relbit);
DEF_FIELD_ADDR(symval, input_device_id, absbit);
DEF_FIELD_ADDR(symval, input_device_id, mscbit);
DEF_FIELD_ADDR(symval, input_device_id, ledbit);
DEF_FIELD_ADDR(symval, input_device_id, sndbit);
DEF_FIELD_ADDR(symval, input_device_id, ffbit);
DEF_FIELD_ADDR(symval, input_device_id, swbit);
sprintf(alias, "input:");
ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);
sprintf(alias + strlen(alias), "-e*");
if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
sprintf(alias + strlen(alias), "k*");
if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
do_input(alias, *keybit,
INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
INPUT_DEVICE_ID_KEY_MAX);
sprintf(alias + strlen(alias), "r*");
if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
sprintf(alias + strlen(alias), "a*");
if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
sprintf(alias + strlen(alias), "m*");
if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
sprintf(alias + strlen(alias), "l*");
if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
sprintf(alias + strlen(alias), "s*");
if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
sprintf(alias + strlen(alias), "f*");
if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
sprintf(alias + strlen(alias), "w*");
if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
return 1;
}
ADD_TO_DEVTABLE("input", input_device_id, do_input_entry);
static int do_eisa_entry(const char *filename, void *symval,
char *alias)
{
DEF_FIELD_ADDR(symval, eisa_device_id, sig);
if (sig[0])
sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", *sig);
else
strcat(alias, "*");
return 1;
}
ADD_TO_DEVTABLE("eisa", eisa_device_id, do_eisa_entry);
/* Looks like: parisc:tNhvNrevNsvN */
static int do_parisc_entry(const char *filename, void *symval,
char *alias)
{
DEF_FIELD(symval, parisc_device_id, hw_type);
DEF_FIELD(symval, parisc_device_id, hversion);
DEF_FIELD(symval, parisc_device_id, hversion_rev);
DEF_FIELD(symval, parisc_device_id, sversion);
strcpy(alias, "parisc:");
ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("parisc", parisc_device_id, do_parisc_entry);
/* Looks like: sdio:cNvNdN. */
static int do_sdio_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD(symval, sdio_device_id, class);
DEF_FIELD(symval, sdio_device_id, vendor);
DEF_FIELD(symval, sdio_device_id, device);
strcpy(alias, "sdio:");
ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("sdio", sdio_device_id, do_sdio_entry);
/* Looks like: ssb:vNidNrevN. */
static int do_ssb_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD(symval, ssb_device_id, vendor);
DEF_FIELD(symval, ssb_device_id, coreid);
DEF_FIELD(symval, ssb_device_id, revision);
strcpy(alias, "ssb:");
ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
ADD(alias, "rev", revision != SSB_ANY_REV, revision);
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("ssb", ssb_device_id, do_ssb_entry);
/* Looks like: bcma:mNidNrevNclN. */
static int do_bcma_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD(symval, bcma_device_id, manuf);
DEF_FIELD(symval, bcma_device_id, id);
DEF_FIELD(symval, bcma_device_id, rev);
DEF_FIELD(symval, bcma_device_id, class);
strcpy(alias, "bcma:");
ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
ADD(alias, "id", id != BCMA_ANY_ID, id);
ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("bcma", bcma_device_id, do_bcma_entry);
/* Looks like: virtio:dNvN */
static int do_virtio_entry(const char *filename, void *symval,
char *alias)
{
DEF_FIELD(symval, virtio_device_id, device);
DEF_FIELD(symval, virtio_device_id, vendor);
strcpy(alias, "virtio:");
ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("virtio", virtio_device_id, do_virtio_entry);
/*
* 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, void *symval,
char *alias)
{
int i;
DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
char guid_name[(sizeof(*guid) + 1) * 2];
for (i = 0; i < (sizeof(*guid) * 2); i += 2)
sprintf(&guid_name[i], "%02x", TO_NATIVE((*guid)[i/2]));
strcpy(alias, "vmbus:");
strcat(alias, guid_name);
return 1;
}
ADD_TO_DEVTABLE("vmbus", hv_vmbus_device_id, do_vmbus_entry);
/* Looks like: i2c:S */
static int do_i2c_entry(const char *filename, void *symval,
char *alias)
{
DEF_FIELD_ADDR(symval, i2c_device_id, name);
sprintf(alias, I2C_MODULE_PREFIX "%s", *name);
return 1;
}
ADD_TO_DEVTABLE("i2c", i2c_device_id, do_i2c_entry);
/* Looks like: spi:S */
static int do_spi_entry(const char *filename, void *symval,
char *alias)
{
DEF_FIELD_ADDR(symval, spi_device_id, name);
sprintf(alias, SPI_MODULE_PREFIX "%s", *name);
return 1;
}
ADD_TO_DEVTABLE("spi", spi_device_id, do_spi_entry);
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, void *symval,
char *alias)
{
int i, j;
DEF_FIELD_ADDR(symval, dmi_system_id, matches);
sprintf(alias, "dmi*");
for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
for (j = 0; j < 4; j++) {
if ((*matches)[j].slot &&
(*matches)[j].slot == dmi_fields[i].field) {
sprintf(alias + strlen(alias), ":%s*",
dmi_fields[i].prefix);
dmi_ascii_filter(alias + strlen(alias),
(*matches)[j].substr);
strcat(alias, "*");
}
}
}
strcat(alias, ":");
return 1;
}
ADD_TO_DEVTABLE("dmi", dmi_system_id, do_dmi_entry);
static int do_platform_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD_ADDR(symval, platform_device_id, name);
sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
return 1;
}
ADD_TO_DEVTABLE("platform", platform_device_id, do_platform_entry);
static int do_mdio_entry(const char *filename,
void *symval, char *alias)
{
int i;
DEF_FIELD(symval, mdio_device_id, phy_id);
DEF_FIELD(symval, mdio_device_id, phy_id_mask);
alias += sprintf(alias, MDIO_MODULE_PREFIX);
for (i = 0; i < 32; i++) {
if (!((phy_id_mask >> (31-i)) & 1))
*(alias++) = '?';
else if ((phy_id >> (31-i)) & 1)
*(alias++) = '1';
else
*(alias++) = '0';
}
/* Terminate the string */
*alias = 0;
return 1;
}
ADD_TO_DEVTABLE("mdio", mdio_device_id, do_mdio_entry);
/* Looks like: zorro:iN. */
static int do_zorro_entry(const char *filename, void *symval,
char *alias)
{
DEF_FIELD(symval, zorro_device_id, id);
strcpy(alias, "zorro:");
ADD(alias, "i", id != ZORRO_WILDCARD, id);
return 1;
}
ADD_TO_DEVTABLE("zorro", zorro_device_id, do_zorro_entry);
/* looks like: "pnp:dD" */
static int do_isapnp_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD(symval, isapnp_device_id, vendor);
DEF_FIELD(symval, isapnp_device_id, function);
sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
'A' + ((vendor >> 2) & 0x3f) - 1,
'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
'A' + ((vendor >> 8) & 0x1f) - 1,
(function >> 4) & 0x0f, function & 0x0f,
(function >> 12) & 0x0f, (function >> 8) & 0x0f);
return 1;
}
ADD_TO_DEVTABLE("isapnp", isapnp_device_id, do_isapnp_entry);
/* Looks like: "ipack:fNvNdN". */
static int do_ipack_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD(symval, ipack_device_id, format);
DEF_FIELD(symval, ipack_device_id, vendor);
DEF_FIELD(symval, ipack_device_id, device);
strcpy(alias, "ipack:");
ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
ADD(alias, "d", device != IPACK_ANY_ID, device);
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("ipack", ipack_device_id, do_ipack_entry);
/*
* 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,
void *symval, char *alias)
{
unsigned int digit;
char *p = alias;
DEF_FIELD(symval, amba_id, id);
DEF_FIELD(symval, amba_id, mask);
if ((id & mask) != 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, mask);
p += sprintf(alias, "amba:d");
for (digit = 0; digit < 8; digit++)
append_nibble_mask(&p,
(id >> (4 * (7 - digit))) & 0xf,
(mask >> (4 * (7 - digit))) & 0xf);
return 1;
}
ADD_TO_DEVTABLE("amba", amba_id, do_amba_entry);
/* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
* All fields are numbers. It would be nicer to use strings for vendor
* and feature, but getting those out of the build system here is too
* complicated.
*/
static int do_x86cpu_entry(const char *filename, void *symval,
char *alias)
{
DEF_FIELD(symval, x86_cpu_id, feature);
DEF_FIELD(symval, x86_cpu_id, family);
DEF_FIELD(symval, x86_cpu_id, model);
DEF_FIELD(symval, x86_cpu_id, vendor);
strcpy(alias, "cpu:type:x86,");
ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor);
ADD(alias, "fam", family != X86_FAMILY_ANY, family);
ADD(alias, "mod", model != X86_MODEL_ANY, model);
strcat(alias, ":feature:*");
if (feature != X86_FEATURE_ANY)
sprintf(alias + strlen(alias), "%04X*", feature);
return 1;
}
ADD_TO_DEVTABLE("x86cpu", x86_cpu_id, do_x86cpu_entry);
/* LOOKS like cpu:type:*:feature:*FEAT* */
static int do_cpu_entry(const char *filename, void *symval, char *alias)
{
DEF_FIELD(symval, cpu_feature, feature);
sprintf(alias, "cpu:type:*:feature:*%04X*", feature);
return 1;
}
ADD_TO_DEVTABLE("cpu", cpu_feature, do_cpu_entry);
/* Looks like: mei:S */
static int do_mei_entry(const char *filename, void *symval,
char *alias)
{
DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
sprintf(alias, MEI_CL_MODULE_PREFIX "%s", *name);
return 1;
}
ADD_TO_DEVTABLE("mei", mei_cl_device_id, do_mei_entry);
/* Looks like: rapidio:vNdNavNadN */
static int do_rio_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD(symval, rio_device_id, did);
DEF_FIELD(symval, rio_device_id, vid);
DEF_FIELD(symval, rio_device_id, asm_did);
DEF_FIELD(symval, rio_device_id, asm_vid);
strcpy(alias, "rapidio:");
ADD(alias, "v", vid != RIO_ANY_ID, vid);
ADD(alias, "d", did != RIO_ANY_ID, did);
ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("rapidio", rio_device_id, do_rio_entry);
/* 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);
}
}
}
/* 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, *identifier;
unsigned int namelen;
/* We're looking for a section relative symbol */
if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
return;
/* We're looking for an object */
if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
return;
/* All our symbols are of form <prefix>__mod_<name>__<identifier>_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;
identifier = strstr(name, "__");
if (!identifier)
return;
namelen = identifier - name;
/* 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 {
struct devtable **p;
INIT_SECTION(__devtable);
for (p = __start___devtable; p < __stop___devtable; 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);
}