diff options
Diffstat (limited to 'scripts/mod')
| -rw-r--r-- | scripts/mod/Makefile | 16 | ||||
| -rw-r--r-- | scripts/mod/empty.c | 1 | ||||
| -rw-r--r-- | scripts/mod/file2alias.c | 308 | ||||
| -rw-r--r-- | scripts/mod/mk_elfconfig.c | 65 | ||||
| -rw-r--r-- | scripts/mod/modpost.c | 797 | ||||
| -rw-r--r-- | scripts/mod/modpost.h | 107 | ||||
| -rw-r--r-- | scripts/mod/sumversion.c | 498 |
7 files changed, 1792 insertions, 0 deletions
diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile new file mode 100644 index 00000000000..11d69c35e5b --- /dev/null +++ b/scripts/mod/Makefile @@ -0,0 +1,16 @@ +hostprogs-y := modpost mk_elfconfig +always := $(hostprogs-y) empty.o + +modpost-objs := modpost.o file2alias.o sumversion.o + +# dependencies on generated files need to be listed explicitly + +$(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o: $(obj)/elfconfig.h + +quiet_cmd_elfconfig = MKELF $@ + cmd_elfconfig = $(obj)/mk_elfconfig $(ARCH) < $< > $@ + +$(obj)/elfconfig.h: $(obj)/empty.o $(obj)/mk_elfconfig FORCE + $(call if_changed,elfconfig) + +targets += elfconfig.h diff --git a/scripts/mod/empty.c b/scripts/mod/empty.c new file mode 100644 index 00000000000..49839cc4ff2 --- /dev/null +++ b/scripts/mod/empty.c @@ -0,0 +1 @@ +/* empty file to figure out endianness / word size */ diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c new file mode 100644 index 00000000000..d54b52d3bb6 --- /dev/null +++ b/scripts/mod/file2alias.c @@ -0,0 +1,308 @@ +/* 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) + +/* Looks like "usb:vNpNdlNdhNdcNdscNdpNicNiscNipN" */ +static int do_usb_entry(const char *filename, + struct usb_device_id *id, char *alias) +{ + id->match_flags = TO_NATIVE(id->match_flags); + id->idVendor = TO_NATIVE(id->idVendor); + id->idProduct = TO_NATIVE(id->idProduct); + id->bcdDevice_lo = TO_NATIVE(id->bcdDevice_lo); + id->bcdDevice_hi = TO_NATIVE(id->bcdDevice_hi); + + /* + * 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 1; + + 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); + ADD(alias, "dl", id->match_flags&USB_DEVICE_ID_MATCH_DEV_LO, + id->bcdDevice_lo); + ADD(alias, "dh", id->match_flags&USB_DEVICE_ID_MATCH_DEV_HI, + id->bcdDevice_hi); + 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); + 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); + + 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")) + do_table(symval, sym->st_size, sizeof(struct usb_device_id), + do_usb_entry, 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); +} diff --git a/scripts/mod/mk_elfconfig.c b/scripts/mod/mk_elfconfig.c new file mode 100644 index 00000000000..de2aabf89fb --- /dev/null +++ b/scripts/mod/mk_elfconfig.c @@ -0,0 +1,65 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <elf.h> + +int +main(int argc, char **argv) +{ + unsigned char ei[EI_NIDENT]; + union { short s; char c[2]; } endian_test; + + if (argc != 2) { + fprintf(stderr, "Error: no arch\n"); + } + if (fread(ei, 1, EI_NIDENT, stdin) != EI_NIDENT) { + fprintf(stderr, "Error: input truncated\n"); + return 1; + } + if (memcmp(ei, ELFMAG, SELFMAG) != 0) { + fprintf(stderr, "Error: not ELF\n"); + return 1; + } + switch (ei[EI_CLASS]) { + case ELFCLASS32: + printf("#define KERNEL_ELFCLASS ELFCLASS32\n"); + break; + case ELFCLASS64: + printf("#define KERNEL_ELFCLASS ELFCLASS64\n"); + break; + default: + abort(); + } + switch (ei[EI_DATA]) { + case ELFDATA2LSB: + printf("#define KERNEL_ELFDATA ELFDATA2LSB\n"); + break; + case ELFDATA2MSB: + printf("#define KERNEL_ELFDATA ELFDATA2MSB\n"); + break; + default: + abort(); + } + + if (sizeof(unsigned long) == 4) { + printf("#define HOST_ELFCLASS ELFCLASS32\n"); + } else if (sizeof(unsigned long) == 8) { + printf("#define HOST_ELFCLASS ELFCLASS64\n"); + } + + endian_test.s = 0x0102; + if (memcmp(endian_test.c, "\x01\x02", 2) == 0) + printf("#define HOST_ELFDATA ELFDATA2MSB\n"); + else if (memcmp(endian_test.c, "\x02\x01", 2) == 0) + printf("#define HOST_ELFDATA ELFDATA2LSB\n"); + else + abort(); + + if ((strcmp(argv[1], "v850") == 0) || (strcmp(argv[1], "h8300") == 0)) + printf("#define MODULE_SYMBOL_PREFIX \"_\"\n"); + else + printf("#define MODULE_SYMBOL_PREFIX \"\"\n"); + + return 0; +} + diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c new file mode 100644 index 00000000000..9b9f94c915d --- /dev/null +++ b/scripts/mod/modpost.c @@ -0,0 +1,797 @@ +/* Postprocess module symbol versions + * + * Copyright 2003 Kai Germaschewski + * Copyright 2002-2004 Rusty Russell, IBM Corporation + * + * Based in part on module-init-tools/depmod.c,file2alias + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + * + * Usage: modpost vmlinux module1.o module2.o ... + */ + +#include <ctype.h> +#include "modpost.h" + +/* Are we using CONFIG_MODVERSIONS? */ +int modversions = 0; +/* Warn about undefined symbols? (do so if we have vmlinux) */ +int have_vmlinux = 0; +/* Is CONFIG_MODULE_SRCVERSION_ALL set? */ +static int all_versions = 0; + +void +fatal(const char *fmt, ...) +{ + va_list arglist; + + fprintf(stderr, "FATAL: "); + + va_start(arglist, fmt); + vfprintf(stderr, fmt, arglist); + va_end(arglist); + + exit(1); +} + +void +warn(const char *fmt, ...) +{ + va_list arglist; + + fprintf(stderr, "WARNING: "); + + va_start(arglist, fmt); + vfprintf(stderr, fmt, arglist); + va_end(arglist); +} + +void *do_nofail(void *ptr, const char *expr) +{ + if (!ptr) { + fatal("modpost: Memory allocation failure: %s.\n", expr); + } + return ptr; +} + +/* A list of all modules we processed */ + +static struct module *modules; + +struct module * +find_module(char *modname) +{ + struct module *mod; + + for (mod = modules; mod; mod = mod->next) + if (strcmp(mod->name, modname) == 0) + break; + return mod; +} + +struct module * +new_module(char *modname) +{ + struct module *mod; + char *p, *s; + + mod = NOFAIL(malloc(sizeof(*mod))); + memset(mod, 0, sizeof(*mod)); + p = NOFAIL(strdup(modname)); + + /* strip trailing .o */ + if ((s = strrchr(p, '.')) != NULL) + if (strcmp(s, ".o") == 0) + *s = '\0'; + + /* add to list */ + mod->name = p; + mod->next = modules; + modules = mod; + + return mod; +} + +/* A hash of all exported symbols, + * struct symbol is also used for lists of unresolved symbols */ + +#define SYMBOL_HASH_SIZE 1024 + +struct symbol { + struct symbol *next; + struct module *module; + unsigned int crc; + int crc_valid; + unsigned int weak:1; + char name[0]; +}; + +static struct symbol *symbolhash[SYMBOL_HASH_SIZE]; + +/* This is based on the hash agorithm from gdbm, via tdb */ +static inline unsigned int tdb_hash(const char *name) +{ + unsigned value; /* Used to compute the hash value. */ + unsigned i; /* Used to cycle through random values. */ + + /* Set the initial value from the key size. */ + for (value = 0x238F13AF * strlen(name), i=0; name[i]; i++) + value = (value + (((unsigned char *)name)[i] << (i*5 % 24))); + + return (1103515243 * value + 12345); +} + +/* Allocate a new symbols for use in the hash of exported symbols or + * the list of unresolved symbols per module */ + +struct symbol * +alloc_symbol(const char *name, unsigned int weak, struct symbol *next) +{ + struct symbol *s = NOFAIL(malloc(sizeof(*s) + strlen(name) + 1)); + + memset(s, 0, sizeof(*s)); + strcpy(s->name, name); + s->weak = weak; + s->next = next; + return s; +} + +/* For the hash of exported symbols */ + +void +new_symbol(const char *name, struct module *module, unsigned int *crc) +{ + unsigned int hash; + struct symbol *new; + + hash = tdb_hash(name) % SYMBOL_HASH_SIZE; + new = symbolhash[hash] = alloc_symbol(name, 0, symbolhash[hash]); + new->module = module; + if (crc) { + new->crc = *crc; + new->crc_valid = 1; + } +} + +struct symbol * +find_symbol(const char *name) +{ + struct symbol *s; + + /* For our purposes, .foo matches foo. PPC64 needs this. */ + if (name[0] == '.') + name++; + + for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s=s->next) { + if (strcmp(s->name, name) == 0) + return s; + } + return NULL; +} + +/* Add an exported symbol - it may have already been added without a + * CRC, in this case just update the CRC */ +void +add_exported_symbol(const char *name, struct module *module, unsigned int *crc) +{ + struct symbol *s = find_symbol(name); + + if (!s) { + new_symbol(name, module, crc); + return; + } + if (crc) { + s->crc = *crc; + s->crc_valid = 1; + } +} + +void * +grab_file(const char *filename, unsigned long *size) +{ + struct stat st; + void *map; + int fd; + + fd = open(filename, O_RDONLY); + if (fd < 0 || fstat(fd, &st) != 0) + return NULL; + + *size = st.st_size; + map = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0); + close(fd); + + if (map == MAP_FAILED) + return NULL; + return map; +} + +/* + Return a copy of the next line in a mmap'ed file. + spaces in the beginning of the line is trimmed away. + Return a pointer to a static buffer. +*/ +char* +get_next_line(unsigned long *pos, void *file, unsigned long size) +{ + static char line[4096]; + int skip = 1; + size_t len = 0; + signed char *p = (signed char *)file + *pos; + char *s = line; + + for (; *pos < size ; (*pos)++) + { + if (skip && isspace(*p)) { + p++; + continue; + } + skip = 0; + if (*p != '\n' && (*pos < size)) { + len++; + *s++ = *p++; + if (len > 4095) + break; /* Too long, stop */ + } else { + /* End of string */ + *s = '\0'; + return line; + } + } + /* End of buffer */ + return NULL; +} + +void +release_file(void *file, unsigned long size) +{ + munmap(file, size); +} + +void +parse_elf(struct elf_info *info, const char *filename) +{ + unsigned int i; + Elf_Ehdr *hdr = info->hdr; + Elf_Shdr *sechdrs; + Elf_Sym *sym; + + hdr = grab_file(filename, &info->size); + if (!hdr) { + perror(filename); + abort(); + } + info->hdr = hdr; + if (info->size < sizeof(*hdr)) + goto truncated; + + /* Fix endianness in ELF header */ + hdr->e_shoff = TO_NATIVE(hdr->e_shoff); + hdr->e_shstrndx = TO_NATIVE(hdr->e_shstrndx); + hdr->e_shnum = TO_NATIVE(hdr->e_shnum); + hdr->e_machine = TO_NATIVE(hdr->e_machine); + sechdrs = (void *)hdr + hdr->e_shoff; + info->sechdrs = sechdrs; + + /* Fix endianness in section headers */ + for (i = 0; i < hdr->e_shnum; i++) { + sechdrs[i].sh_type = TO_NATIVE(sechdrs[i].sh_type); + sechdrs[i].sh_offset = TO_NATIVE(sechdrs[i].sh_offset); + sechdrs[i].sh_size = TO_NATIVE(sechdrs[i].sh_size); + sechdrs[i].sh_link = TO_NATIVE(sechdrs[i].sh_link); + sechdrs[i].sh_name = TO_NATIVE(sechdrs[i].sh_name); + } + /* Find symbol table. */ + for (i = 1; i < hdr->e_shnum; i++) { + const char *secstrings + = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; + + if (sechdrs[i].sh_offset > info->size) + goto truncated; + if (strcmp(secstrings+sechdrs[i].sh_name, ".modinfo") == 0) { + info->modinfo = (void *)hdr + sechdrs[i].sh_offset; + info->modinfo_len = sechdrs[i].sh_size; + } + if (sechdrs[i].sh_type != SHT_SYMTAB) + continue; + + info->symtab_start = (void *)hdr + sechdrs[i].sh_offset; + info->symtab_stop = (void *)hdr + sechdrs[i].sh_offset + + sechdrs[i].sh_size; + info->strtab = (void *)hdr + + sechdrs[sechdrs[i].sh_link].sh_offset; + } + if (!info->symtab_start) { + fprintf(stderr, "modpost: %s no symtab?\n", filename); + abort(); + } + /* Fix endianness in symbols */ + for (sym = info->symtab_start; sym < info->symtab_stop; sym++) { + sym->st_shndx = TO_NATIVE(sym->st_shndx); + sym->st_name = TO_NATIVE(sym->st_name); + sym->st_value = TO_NATIVE(sym->st_value); + sym->st_size = TO_NATIVE(sym->st_size); + } + return; + + truncated: + fprintf(stderr, "modpost: %s is truncated.\n", filename); + abort(); +} + +void +parse_elf_finish(struct elf_info *info) +{ + release_file(info->hdr, info->size); +} + +#define CRC_PFX MODULE_SYMBOL_PREFIX "__crc_" +#define KSYMTAB_PFX MODULE_SYMBOL_PREFIX "__ksymtab_" + +void +handle_modversions(struct module *mod, struct elf_info *info, + Elf_Sym *sym, const char *symname) +{ + unsigned int crc; + + switch (sym->st_shndx) { + case SHN_COMMON: + fprintf(stderr, "*** Warning: \"%s\" [%s] is COMMON symbol\n", + symname, mod->name); + break; + case SHN_ABS: + /* CRC'd symbol */ + if (memcmp(symname, CRC_PFX, strlen(CRC_PFX)) == 0) { + crc = (unsigned int) sym->st_value; + add_exported_symbol(symname + strlen(CRC_PFX), + mod, &crc); + } + break; + case SHN_UNDEF: + /* undefined symbol */ + if (ELF_ST_BIND(sym->st_info) != STB_GLOBAL && + ELF_ST_BIND(sym->st_info) != STB_WEAK) + break; + /* ignore global offset table */ + if (strcmp(symname, "_GLOBAL_OFFSET_TABLE_") == 0) + break; + /* ignore __this_module, it will be resolved shortly */ + if (strcmp(symname, MODULE_SYMBOL_PREFIX "__this_module") == 0) + break; +#ifdef STT_REGISTER + if (info->hdr->e_machine == EM_SPARC || + info->hdr->e_machine == EM_SPARCV9) { + /* Ignore register directives. */ + if (ELF_ST_TYPE(sym->st_info) == STT_REGISTER) + break; + } +#endif + + if (memcmp(symname, MODULE_SYMBOL_PREFIX, + strlen(MODULE_SYMBOL_PREFIX)) == 0) + mod->unres = alloc_symbol(symname + + strlen(MODULE_SYMBOL_PREFIX), + ELF_ST_BIND(sym->st_info) == STB_WEAK, + mod->unres); + break; + default: + /* All exported symbols */ + if (memcmp(symname, KSYMTAB_PFX, strlen(KSYMTAB_PFX)) == 0) { + add_exported_symbol(symname + strlen(KSYMTAB_PFX), + mod, NULL); + } + if (strcmp(symname, MODULE_SYMBOL_PREFIX "init_module") == 0) + mod->has_init = 1; + if (strcmp(symname, MODULE_SYMBOL_PREFIX "cleanup_module") == 0) + mod->has_cleanup = 1; + break; + } +} + +int +is_vmlinux(const char *modname) +{ + const char *myname; + + if ((myname = strrchr(modname, '/'))) + myname++; + else + myname = modname; + + return strcmp(myname, "vmlinux") == 0; +} + +/* Parse tag=value strings from .modinfo section */ +static char *next_string(char *string, unsigned long *secsize) +{ + /* Skip non-zero chars */ + while (string[0]) { + string++; + if ((*secsize)-- <= 1) + return NULL; + } + + /* Skip any zero padding. */ + while (!string[0]) { + string++; + if ((*secsize)-- <= 1) + return NULL; + } + return string; +} + +static char *get_modinfo(void *modinfo, unsigned long modinfo_len, + const char *tag) +{ + char *p; + unsigned int taglen = strlen(tag); + unsigned long size = modinfo_len; + + for (p = modinfo; p; p = next_string(p, &size)) { + if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=') + return p + taglen + 1; + } + return NULL; +} + +void +read_symbols(char *modname) +{ + const char *symname; + char *version; + struct module *mod; + struct elf_info info = { }; + Elf_Sym *sym; + + parse_elf(&info, modname); + + mod = new_module(modname); + + /* When there's no vmlinux, don't print warnings about + * unresolved symbols (since there'll be too many ;) */ + if (is_vmlinux(modname)) { + unsigned int fake_crc = 0; + have_vmlinux = 1; + add_exported_symbol("struct_module", mod, &fake_crc); + mod->skip = 1; + } + + for (sym = info.symtab_start; sym < info.symtab_stop; sym++) { + symname = info.strtab + sym->st_name; + + handle_modversions(mod, &info, sym, symname); + handle_moddevtable(mod, &info, sym, symname); + } + + version = get_modinfo(info.modinfo, info.modinfo_len, "version"); + if (version) + maybe_frob_rcs_version(modname, version, info.modinfo, + version - (char *)info.hdr); + if (version || (all_versions && !is_vmlinux(modname))) + get_src_version(modname, mod->srcversion, + sizeof(mod->srcversion)-1); + + parse_elf_finish(&info); + + /* Our trick to get versioning for struct_module - it's + * never passed as an argument to an exported function, so + * the automatic versioning doesn't pick it up, but it's really + * important anyhow */ + if (modversions) + mod->unres = alloc_symbol("struct_module", 0, mod->unres); +} + +#define SZ 500 + +/* We first write the generated file into memory using the + * following helper, then compare to the file on disk and + * only update the later if anything changed */ + +void __attribute__((format(printf, 2, 3))) +buf_printf(struct buffer *buf, const char *fmt, ...) +{ + char tmp[SZ]; + int len; + va_list ap; + + va_start(ap, fmt); + len = vsnprintf(tmp, SZ, fmt, ap); + if (buf->size - buf->pos < len + 1) { + buf->size += 128; + buf->p = realloc(buf->p, buf->size); + } + strncpy(buf->p + buf->pos, tmp, len + 1); + buf->pos += len; + va_end(ap); +} + +void +buf_write(struct buffer *buf, const char *s, int len) +{ + if (buf->size - buf->pos < len) { + buf->size += len; + buf->p = realloc(buf->p, buf->size); + } + strncpy(buf->p + buf->pos, s, len); + buf->pos += len; +} + +/* Header for the generated file */ + +void +add_header(struct buffer *b, struct module *mod) +{ + buf_printf(b, "#include <linux/module.h>\n"); + buf_printf(b, "#include <linux/vermagic.h>\n"); + buf_printf(b, "#include <linux/compiler.h>\n"); + buf_printf(b, "\n"); + buf_printf(b, "MODULE_INFO(vermagic, VERMAGIC_STRING);\n"); + buf_printf(b, "\n"); + buf_printf(b, "#undef unix\n"); /* We have a module called "unix" */ + buf_printf(b, "struct module __this_module\n"); + buf_printf(b, "__attribute__((section(\".gnu.linkonce.this_module\"))) = {\n"); + buf_printf(b, " .name = __stringify(KBUILD_MODNAME),\n"); + if (mod->has_init) + buf_printf(b, " .init = init_module,\n"); + if (mod->has_cleanup) + buf_printf(b, "#ifdef CONFIG_MODULE_UNLOAD\n" + " .exit = cleanup_module,\n" + "#endif\n"); + buf_printf(b, "};\n"); +} + +/* Record CRCs for unresolved symbols */ + +void +add_versions(struct buffer *b, struct module *mod) +{ + struct symbol *s, *exp; + + for (s = mod->unres; s; s = s->next) { + exp = find_symbol(s->name); + if (!exp || exp->module == mod) { + if (have_vmlinux && !s->weak) + fprintf(stderr, "*** Warning: \"%s\" [%s.ko] " + "undefined!\n", s->name, mod->name); + continue; + } + s->module = exp->module; + s->crc_valid = exp->crc_valid; + s->crc = exp->crc; + } + + if (!modversions) + return; + + buf_printf(b, "\n"); + buf_printf(b, "static const struct modversion_info ____versions[]\n"); + buf_printf(b, "__attribute_used__\n"); + buf_printf(b, "__attribute__((section(\"__versions\"))) = {\n"); + + for (s = mod->unres; s; s = s->next) { + if (!s->module) { + continue; + } + if (!s->crc_valid) { + fprintf(stderr, "*** Warning: \"%s\" [%s.ko] " + "has no CRC!\n", + s->name, mod->name); + continue; + } + buf_printf(b, "\t{ %#8x, \"%s\" },\n", s->crc, s->name); + } + + buf_printf(b, "};\n"); +} + +void +add_depends(struct buffer *b, struct module *mod, struct module *modules) +{ + struct symbol *s; + struct module *m; + int first = 1; + + for (m = modules; m; m = m->next) { + m->seen = is_vmlinux(m->name); + } + + buf_printf(b, "\n"); + buf_printf(b, "static const char __module_depends[]\n"); + buf_printf(b, "__attribute_used__\n"); + buf_printf(b, "__attribute__((section(\".modinfo\"))) =\n"); + buf_printf(b, "\"depends="); + for (s = mod->unres; s; s = s->next) { + if (!s->module) + continue; + + if (s->module->seen) + continue; + + s->module->seen = 1; + buf_printf(b, "%s%s", first ? "" : ",", + strrchr(s->module->name, '/') + 1); + first = 0; + } + buf_printf(b, "\";\n"); +} + +void +add_srcversion(struct buffer *b, struct module *mod) +{ + if (mod->srcversion[0]) { + buf_printf(b, "\n"); + buf_printf(b, "MODULE_INFO(srcversion, \"%s\");\n", + mod->srcversion); + } +} + +void +write_if_changed(struct buffer *b, const char *fname) +{ + char *tmp; + FILE *file; + struct stat st; + + file = fopen(fname, "r"); + if (!file) + goto write; + + if (fstat(fileno(file), &st) < 0) + goto close_write; + + if (st.st_size != b->pos) + goto close_write; + + tmp = NOFAIL(malloc(b->pos)); + if (fread(tmp, 1, b->pos, file) != b->pos) + goto free_write; + + if (memcmp(tmp, b->p, b->pos) != 0) + goto free_write; + + free(tmp); + fclose(file); + return; + + free_write: + free(tmp); + close_write: + fclose(file); + write: + file = fopen(fname, "w"); + if (!file) { + perror(fname); + exit(1); + } + if (fwrite(b->p, 1, b->pos, file) != b->pos) { + perror(fname); + exit(1); + } + fclose(file); +} + +void +read_dump(const char *fname) +{ + unsigned long size, pos = 0; + void *file = grab_file(fname, &size); + char *line; + + if (!file) + /* No symbol versions, silently ignore */ + return; + + while ((line = get_next_line(&pos, file, size))) { + char *symname, *modname, *d; + unsigned int crc; + struct module *mod; + + if (!(symname = strchr(line, '\t'))) + goto fail; + *symname++ = '\0'; + if (!(modname = strchr(symname, '\t'))) + goto fail; + *modname++ = '\0'; + if (strchr(modname, '\t')) + goto fail; + crc = strtoul(line, &d, 16); + if (*symname == '\0' || *modname == '\0' || *d != '\0') + goto fail; + + if (!(mod = find_module(modname))) { + if (is_vmlinux(modname)) { + have_vmlinux = 1; + } + mod = new_module(NOFAIL(strdup(modname))); + mod->skip = 1; + } + add_exported_symbol(symname, mod, &crc); + } + return; +fail: + fatal("parse error in symbol dump file\n"); +} + +void +write_dump(const char *fname) +{ + struct buffer buf = { }; + struct symbol *symbol; + int n; + + for (n = 0; n < SYMBOL_HASH_SIZE ; n++) { + symbol = symbolhash[n]; + while (symbol) { + symbol = symbol->next; + } + } + + for (n = 0; n < SYMBOL_HASH_SIZE ; n++) { + symbol = symbolhash[n]; + while (symbol) { + buf_printf(&buf, "0x%08x\t%s\t%s\n", symbol->crc, + symbol->name, symbol->module->name); + symbol = symbol->next; + } + } + write_if_changed(&buf, fname); +} + +int +main(int argc, char **argv) +{ + struct module *mod; + struct buffer buf = { }; + char fname[SZ]; + char *dump_read = NULL, *dump_write = NULL; + int opt; + + while ((opt = getopt(argc, argv, "i:mo:a")) != -1) { + switch(opt) { + case 'i': + dump_read = optarg; + break; + case 'm': + modversions = 1; + break; + case 'o': + dump_write = optarg; + break; + case 'a': + all_versions = 1; + break; + default: + exit(1); + } + } + + if (dump_read) + read_dump(dump_read); + + while (optind < argc) { + read_symbols(argv[optind++]); + } + + for (mod = modules; mod; mod = mod->next) { + if (mod->skip) + continue; + + buf.pos = 0; + + add_header(&buf, mod); + add_versions(&buf, mod); + add_depends(&buf, mod, modules); + add_moddevtable(&buf, mod); + add_srcversion(&buf, mod); + + sprintf(fname, "%s.mod.c", mod->name); + write_if_changed(&buf, fname); + } + + if (dump_write) + write_dump(dump_write); + + return 0; +} + diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h new file mode 100644 index 00000000000..7334d839145 --- /dev/null +++ b/scripts/mod/modpost.h @@ -0,0 +1,107 @@ +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/mman.h> +#include <fcntl.h> +#include <unistd.h> +#include <elf.h> + +#include "elfconfig.h" + +#if KERNEL_ELFCLASS == ELFCLASS32 + +#define Elf_Ehdr Elf32_Ehdr +#define Elf_Shdr Elf32_Shdr +#define Elf_Sym Elf32_Sym +#define ELF_ST_BIND ELF32_ST_BIND +#define ELF_ST_TYPE ELF32_ST_TYPE + +#else + +#define Elf_Ehdr Elf64_Ehdr +#define Elf_Shdr Elf64_Shdr +#define Elf_Sym Elf64_Sym +#define ELF_ST_BIND ELF64_ST_BIND +#define ELF_ST_TYPE ELF64_ST_TYPE + +#endif + +#if KERNEL_ELFDATA != HOST_ELFDATA + +static inline void __endian(const void *src, void *dest, unsigned int size) +{ + unsigned int i; + for (i = 0; i < size; i++) + ((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1]; +} + + + +#define TO_NATIVE(x) \ +({ \ + typeof(x) __x; \ + __endian(&(x), &(__x), sizeof(__x)); \ + __x; \ +}) + +#else /* endianness matches */ + +#define TO_NATIVE(x) (x) + +#endif + +#define NOFAIL(ptr) do_nofail((ptr), #ptr) +void *do_nofail(void *ptr, const char *expr); + +struct buffer { + char *p; + int pos; + int size; +}; + +void __attribute__((format(printf, 2, 3))) +buf_printf(struct buffer *buf, const char *fmt, ...); + +void +buf_write(struct buffer *buf, const char *s, int len); + +struct module { + struct module *next; + const char *name; + struct symbol *unres; + int seen; + int skip; + int has_init; + int has_cleanup; + struct buffer dev_table_buf; + char srcversion[25]; +}; + +struct elf_info { + unsigned long size; + Elf_Ehdr *hdr; + Elf_Shdr *sechdrs; + Elf_Sym *symtab_start; + Elf_Sym *symtab_stop; + const char *strtab; + char *modinfo; + unsigned int modinfo_len; +}; + +void handle_moddevtable(struct module *mod, struct elf_info *info, + Elf_Sym *sym, const char *symname); + +void add_moddevtable(struct buffer *buf, struct module *mod); + +void maybe_frob_rcs_version(const char *modfilename, + char *version, + void *modinfo, + unsigned long modinfo_offset); +void get_src_version(const char *modname, char sum[], unsigned sumlen); + +void *grab_file(const char *filename, unsigned long *size); +char* get_next_line(unsigned long *pos, void *file, unsigned long size); +void release_file(void *file, unsigned long size); diff --git a/scripts/mod/sumversion.c b/scripts/mod/sumversion.c new file mode 100644 index 00000000000..1112347245c --- /dev/null +++ b/scripts/mod/sumversion.c @@ -0,0 +1,498 @@ +#include <netinet/in.h> +#ifdef __sun__ +#include <inttypes.h> +#else +#include <stdint.h> +#endif +#include <ctype.h> +#include <errno.h> +#include <string.h> +#include "modpost.h" + +/* + * Stolen form Cryptographic API. + * + * MD4 Message Digest Algorithm (RFC1320). + * + * Implementation derived from Andrew Tridgell and Steve French's + * CIFS MD4 implementation, and the cryptoapi implementation + * originally based on the public domain implementation written + * by Colin Plumb in 1993. + * + * Copyright (c) Andrew Tridgell 1997-1998. + * Modified by Steve French (sfrench@us.ibm.com) 2002 + * Copyright (c) Cryptoapi developers. + * Copyright (c) 2002 David S. Miller (davem@redhat.com) + * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ +#define MD4_DIGEST_SIZE 16 +#define MD4_HMAC_BLOCK_SIZE 64 +#define MD4_BLOCK_WORDS 16 +#define MD4_HASH_WORDS 4 + +struct md4_ctx { + uint32_t hash[MD4_HASH_WORDS]; + uint32_t block[MD4_BLOCK_WORDS]; + uint64_t byte_count; +}; + +static inline uint32_t lshift(uint32_t x, unsigned int s) +{ + x &= 0xFFFFFFFF; + return ((x << s) & 0xFFFFFFFF) | (x >> (32 - s)); +} + +static inline uint32_t F(uint32_t x, uint32_t y, uint32_t z) +{ + return (x & y) | ((~x) & z); +} + +static inline uint32_t G(uint32_t x, uint32_t y, uint32_t z) +{ + return (x & y) | (x & z) | (y & z); +} + +static inline uint32_t H(uint32_t x, uint32_t y, uint32_t z) +{ + return x ^ y ^ z; +} + +#define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s)) +#define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (uint32_t)0x5A827999,s)) +#define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (uint32_t)0x6ED9EBA1,s)) + +/* XXX: this stuff can be optimized */ +static inline void le32_to_cpu_array(uint32_t *buf, unsigned int words) +{ + while (words--) { + *buf = ntohl(*buf); + buf++; + } +} + +static inline void cpu_to_le32_array(uint32_t *buf, unsigned int words) +{ + while (words--) { + *buf = htonl(*buf); + buf++; + } +} + +static void md4_transform(uint32_t *hash, uint32_t const *in) +{ + uint32_t a, b, c, d; + + a = hash[0]; + b = hash[1]; + c = hash[2]; + d = hash[3]; + + ROUND1(a, b, c, d, in[0], 3); + ROUND1(d, a, b, c, in[1], 7); + ROUND1(c, d, a, b, in[2], 11); + ROUND1(b, c, d, a, in[3], 19); + ROUND1(a, b, c, d, in[4], 3); + ROUND1(d, a, b, c, in[5], 7); + ROUND1(c, d, a, b, in[6], 11); + ROUND1(b, c, d, a, in[7], 19); + ROUND1(a, b, c, d, in[8], 3); + ROUND1(d, a, b, c, in[9], 7); + ROUND1(c, d, a, b, in[10], 11); + ROUND1(b, c, d, a, in[11], 19); + ROUND1(a, b, c, d, in[12], 3); + ROUND1(d, a, b, c, in[13], 7); + ROUND1(c, d, a, b, in[14], 11); + ROUND1(b, c, d, a, in[15], 19); + + ROUND2(a, b, c, d,in[ 0], 3); + ROUND2(d, a, b, c, in[4], 5); + ROUND2(c, d, a, b, in[8], 9); + ROUND2(b, c, d, a, in[12], 13); + ROUND2(a, b, c, d, in[1], 3); + ROUND2(d, a, b, c, in[5], 5); + ROUND2(c, d, a, b, in[9], 9); + ROUND2(b, c, d, a, in[13], 13); + ROUND2(a, b, c, d, in[2], 3); + ROUND2(d, a, b, c, in[6], 5); + ROUND2(c, d, a, b, in[10], 9); + ROUND2(b, c, d, a, in[14], 13); + ROUND2(a, b, c, d, in[3], 3); + ROUND2(d, a, b, c, in[7], 5); + ROUND2(c, d, a, b, in[11], 9); + ROUND2(b, c, d, a, in[15], 13); + + ROUND3(a, b, c, d,in[ 0], 3); + ROUND3(d, a, b, c, in[8], 9); + ROUND3(c, d, a, b, in[4], 11); + ROUND3(b, c, d, a, in[12], 15); + ROUND3(a, b, c, d, in[2], 3); + ROUND3(d, a, b, c, in[10], 9); + ROUND3(c, d, a, b, in[6], 11); + ROUND3(b, c, d, a, in[14], 15); + ROUND3(a, b, c, d, in[1], 3); + ROUND3(d, a, b, c, in[9], 9); + ROUND3(c, d, a, b, in[5], 11); + ROUND3(b, c, d, a, in[13], 15); + ROUND3(a, b, c, d, in[3], 3); + ROUND3(d, a, b, c, in[11], 9); + ROUND3(c, d, a, b, in[7], 11); + ROUND3(b, c, d, a, in[15], 15); + + hash[0] += a; + hash[1] += b; + hash[2] += c; + hash[3] += d; +} + +static inline void md4_transform_helper(struct md4_ctx *ctx) +{ + le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(uint32_t)); + md4_transform(ctx->hash, ctx->block); +} + +static void md4_init(struct md4_ctx *mctx) +{ + mctx->hash[0] = 0x67452301; + mctx->hash[1] = 0xefcdab89; + mctx->hash[2] = 0x98badcfe; + mctx->hash[3] = 0x10325476; + mctx->byte_count = 0; +} + +static void md4_update(struct md4_ctx *mctx, + const unsigned char *data, unsigned int len) +{ + const uint32_t avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f); + + mctx->byte_count += len; + + if (avail > len) { + memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), + data, len); + return; + } + + memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), + data, avail); + + md4_transform_helper(mctx); + data += avail; + len -= avail; + + while (len >= sizeof(mctx->block)) { + memcpy(mctx->block, data, sizeof(mctx->block)); + md4_transform_helper(mctx); + data += sizeof(mctx->block); + len -= sizeof(mctx->block); + } + + memcpy(mctx->block, data, len); +} + +static void md4_final_ascii(struct md4_ctx *mctx, char *out, unsigned int len) +{ + const unsigned int offset = mctx->byte_count & 0x3f; + char *p = (char *)mctx->block + offset; + int padding = 56 - (offset + 1); + + *p++ = 0x80; + if (padding < 0) { + memset(p, 0x00, padding + sizeof (uint64_t)); + md4_transform_helper(mctx); + p = (char *)mctx->block; + padding = 56; + } + + memset(p, 0, padding); + mctx->block[14] = mctx->byte_count << 3; + mctx->block[15] = mctx->byte_count >> 29; + le32_to_cpu_array(mctx->block, (sizeof(mctx->block) - + sizeof(uint64_t)) / sizeof(uint32_t)); + md4_transform(mctx->hash, mctx->block); + cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(uint32_t)); + + snprintf(out, len, "%08X%08X%08X%08X", + mctx->hash[0], mctx->hash[1], mctx->hash[2], mctx->hash[3]); +} + +static inline void add_char(unsigned char c, struct md4_ctx *md) +{ + md4_update(md, &c, 1); +} + +static int parse_string(const char *file, unsigned long len, + struct md4_ctx *md) +{ + unsigned long i; + + add_char(file[0], md); + for (i = 1; i < len; i++) { + add_char(file[i], md); + if (file[i] == '"' && file[i-1] != '\\') + break; + } + return i; +} + +static int parse_comment(const char *file, unsigned long len) +{ + unsigned long i; + + for (i = 2; i < len; i++) { + if (file[i-1] == '*' && file[i] == '/') + break; + } + return i; +} + +/* FIXME: Handle .s files differently (eg. # starts comments) --RR */ +static int parse_file(const signed char *fname, struct md4_ctx *md) +{ + signed char *file; + unsigned long i, len; + + file = grab_file(fname, &len); + if (!file) + return 0; + + for (i = 0; i < len; i++) { + /* Collapse and ignore \ and CR. */ + if (file[i] == '\\' && (i+1 < len) && file[i+1] == '\n') { + i++; + continue; + } + + /* Ignore whitespace */ + if (isspace(file[i])) + continue; + + /* Handle strings as whole units */ + if (file[i] == '"') { + i += parse_string(file+i, len - i, md); + continue; + } + + /* Comments: ignore */ + if (file[i] == '/' && file[i+1] == '*') { + i += parse_comment(file+i, len - i); + continue; + } + + add_char(file[i], md); + } + release_file(file, len); + return 1; +} + +/* We have dir/file.o. Open dir/.file.o.cmd, look for deps_ line to + * figure out source file. */ +static int parse_source_files(const char *objfile, struct md4_ctx *md) +{ + char *cmd, *file, *line, *dir; + const char *base; + unsigned long flen, pos = 0; + int dirlen, ret = 0, check_files = 0; + + cmd = NOFAIL(malloc(strlen(objfile) + sizeof("..cmd"))); + + base = strrchr(objfile, '/'); + if (base) { + base++; + dirlen = base - objfile; + sprintf(cmd, "%.*s.%s.cmd", dirlen, objfile, base); + } else { + dirlen = 0; + sprintf(cmd, ".%s.cmd", objfile); + } + dir = NOFAIL(malloc(dirlen + 1)); + strncpy(dir, objfile, dirlen); + dir[dirlen] = '\0'; + + file = grab_file(cmd, &flen); + if (!file) { + fprintf(stderr, "Warning: could not find %s for %s\n", + cmd, objfile); + goto out; + } + + /* There will be a line like so: + deps_drivers/net/dummy.o := \ + drivers/net/dummy.c \ + $(wildcard include/config/net/fastroute.h) \ + include/linux/config.h \ + $(wildcard include/config/h.h) \ + include/linux/module.h \ + + Sum all files in the same dir or subdirs. + */ + while ((line = get_next_line(&pos, file, flen)) != NULL) { + signed char* p = line; + if (strncmp(line, "deps_", sizeof("deps_")-1) == 0) { + check_files = 1; + continue; + } + if (!check_files) + continue; + + /* Continue until line does not end with '\' */ + if ( *(p + strlen(p)-1) != '\\') + break; + /* Terminate line at first space, to get rid of final ' \' */ + while (*p) { + if (isspace(*p)) { + *p = '\0'; + break; + } + p++; + } + + /* Check if this file is in same dir as objfile */ + if ((strstr(line, dir)+strlen(dir)-1) == strrchr(line, '/')) { + if (!parse_file(line, md)) { + fprintf(stderr, + "Warning: could not open %s: %s\n", + line, strerror(errno)); + goto out_file; + } + + } + + } + + /* Everyone parsed OK */ + ret = 1; +out_file: + release_file(file, flen); +out: + free(dir); + free(cmd); + return ret; +} + +/* Calc and record src checksum. */ +void get_src_version(const char *modname, char sum[], unsigned sumlen) +{ + void *file; + unsigned long len; + struct md4_ctx md; + char *sources, *end, *fname; + const char *basename; + char filelist[strlen(getenv("MODVERDIR")) + strlen("/") + + strlen(modname) - strlen(".o") + strlen(".mod") + 1 ]; + + /* Source files for module are in .tmp_versions/modname.mod, + after the first line. */ + if (strrchr(modname, '/')) + basename = strrchr(modname, '/') + 1; + else + basename = modname; + sprintf(filelist, "%s/%.*s.mod", getenv("MODVERDIR"), + (int) strlen(basename) - 2, basename); + + file = grab_file(filelist, &len); + if (!file) { + fprintf(stderr, "Warning: could not find versions for %s\n", + filelist); + return; + } + + sources = strchr(file, '\n'); + if (!sources) { + fprintf(stderr, "Warning: malformed versions file for %s\n", + modname); + goto release; + } + + sources++; + end = strchr(sources, '\n'); + if (!end) { + fprintf(stderr, "Warning: bad ending versions file for %s\n", + modname); + goto release; + } + *end = '\0'; + + md4_init(&md); + while ((fname = strsep(&sources, " ")) != NULL) { + if (!*fname) + continue; + if (!parse_source_files(fname, &md)) + goto release; + } + + md4_final_ascii(&md, sum, sumlen); +release: + release_file(file, len); +} + +static void write_version(const char *filename, const char *sum, + unsigned long offset) +{ + int fd; + + fd = open(filename, O_RDWR); + if (fd < 0) { + fprintf(stderr, "Warning: changing sum in %s failed: %s\n", + filename, strerror(errno)); + return; + } + + if (lseek(fd, offset, SEEK_SET) == (off_t)-1) { + fprintf(stderr, "Warning: changing sum in %s:%lu failed: %s\n", + filename, offset, strerror(errno)); + goto out; + } + + if (write(fd, sum, strlen(sum)+1) != strlen(sum)+1) { + fprintf(stderr, "Warning: writing sum in %s failed: %s\n", + filename, strerror(errno)); + goto out; + } +out: + close(fd); +} + +static int strip_rcs_crap(signed char *version) +{ + unsigned int len, full_len; + + if (strncmp(version, "$Revision", strlen("$Revision")) != 0) + return 0; + + /* Space for version string follows. */ + full_len = strlen(version) + strlen(version + strlen(version) + 1) + 2; + + /* Move string to start with version number: prefix will be + * $Revision$ or $Revision: */ + len = strlen("$Revision"); + if (version[len] == ':' || version[len] == '$') + len++; + while (isspace(version[len])) + len++; + memmove(version, version+len, full_len-len); + full_len -= len; + + /* Preserve up to next whitespace. */ + len = 0; + while (version[len] && !isspace(version[len])) + len++; + memmove(version + len, version + strlen(version), + full_len - strlen(version)); + return 1; +} + +/* Clean up RCS-style version numbers. */ +void maybe_frob_rcs_version(const char *modfilename, + char *version, + void *modinfo, + unsigned long version_offset) +{ + if (strip_rcs_crap(version)) + write_version(modfilename, version, version_offset); +} |