808 строки
17 KiB
C
808 строки
17 KiB
C
/* 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 "__crc_"
|
|
#define KSYMTAB_PFX "__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;
|
|
/* cope with newer glibc (2.3.4 or higher) STT_ definition in elf.h */
|
|
#if defined(STT_REGISTER) || defined(STT_SPARC_REGISTER)
|
|
/* add compatibility with older glibc */
|
|
#ifndef STT_SPARC_REGISTER
|
|
#define STT_SPARC_REGISTER STT_REGISTER
|
|
#endif
|
|
if (info->hdr->e_machine == EM_SPARC ||
|
|
info->hdr->e_machine == EM_SPARCV9) {
|
|
/* Ignore register directives. */
|
|
if (ELF_ST_TYPE(sym->st_info) == STT_SPARC_REGISTER)
|
|
break;
|
|
if (symname[0] == '.') {
|
|
char *munged = strdup(symname);
|
|
munged[0] = '_';
|
|
munged[1] = toupper(munged[1]);
|
|
symname = munged;
|
|
}
|
|
}
|
|
#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, "struct module __this_module\n");
|
|
buf_printf(b, "__attribute__((section(\".gnu.linkonce.this_module\"))) = {\n");
|
|
buf_printf(b, " .name = 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;
|
|
}
|
|
|