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linux/scripts/mod/file2alias.c
Sylvain Munaut d1ab423502 powerpc: Fix the MODALIAS generation in modpost for of devices 
Since the devices may have multiple (or none) compatible properties,
the uevent generated internally by the kernel may have multiple
"C..." entries. So the MODALIAS stored in the module must have
wilcard before and after the compatible entry.
Also, if the 'compatible' field is not used for matching, there
will be no 'C' and that must handled as well.

The previous code handled all those case incorrectly and it
"mostly" worked ... but not always.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-05-19 09:10:10 +02:00

599 lines
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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>
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)
/**
* 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.
**/
static void device_id_size_check(const char *modname, const char *device_id,
unsigned long size, unsigned long id_size)
{
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_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);
}
}
/* 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);
/* 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);
}
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->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_size_check(mod->name, "usb", size, id_size);
/* 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);
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);
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);
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: "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);
return 1;
}
/* looks like: "pnp:dD" */
static int do_pnp_entry(const char *filename,
struct pnp_device_id *id, char *alias)
{
sprintf(alias, "pnp:d%s", id->id);
return 1;
}
/* looks like: "pnp:cCdD..." */
static int do_pnp_card_entry(const char *filename,
struct pnp_card_device_id *id, char *alias)
{
int i;
sprintf(alias, "pnp:c%s", id->id);
for (i = 0; i < PNP_MAX_DEVICES; i++) {
if (! *id->devs[i].id)
break;
sprintf(alias + strlen(alias), "d%s", id->devs[i].id);
}
return 1;
}
/* 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;
}
static int do_i2c_entry(const char *filename, struct i2c_device_id *i2c, char *alias)
{
strcpy(alias, "i2c:");
ADD(alias, "id", 1, i2c->id);
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;
}
/* 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_size_check(mod->name, device_id, size, id_size);
/* 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;
/* We're looking for a section relative symbol */
if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum)
return;
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_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_i2c_device_table"))
do_table(symval, sym->st_size,
sizeof(struct i2c_device_id), "i2c",
do_i2c_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);
}
/* 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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