/* 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; #else typedef Elf64_Addr kernel_ulong_t; #endif #ifdef __sun__ #include <inttypes.h> #else #include <stdint.h> #endif 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) /* 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); if (size % id_size || size < id_size) { fprintf(stderr, "*** Warning: %s ids %lu bad size " "(each on %lu)\n", mod->name, 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)) { fprintf(stderr, "*** Warning: 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_TYPE, id->dev_model); 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; } /* 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, void *function, struct module *mod) { unsigned int i; char alias[500]; int (*do_entry)(const char *, void *entry, char *alias) = function; if (size % id_size || size < id_size) { fprintf(stderr, "*** Warning: %s ids %lu bad size " "(each on %lu)\n", mod->name, 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), 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), do_ieee1394_entry, mod); else if (sym_is(symname, "__mod_ccw_device_table")) do_table(symval, sym->st_size, sizeof(struct ccw_device_id), do_ccw_entry, mod); else if (sym_is(symname, "__mod_serio_device_table")) do_table(symval, sym->st_size, sizeof(struct serio_device_id), do_serio_entry, mod); else if (sym_is(symname, "__mod_pnp_device_table")) do_table(symval, sym->st_size, sizeof(struct pnp_device_id), 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), do_pnp_card_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); }