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/*
* Get kernel symbol table(s) and other relevant module info.
*
* Add module_name_list and l_module_name_list.
* Keith Owens <kaos@ocs.com.au> November 1999.
* Björn Ekwall <bj0rn@blox.se> in February 1999 (C)
* Initial work contributed by Richard Henderson <rth@tamu.edu>
*
* This file is part of the Linux modutils.
*
* 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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "util.h"
#include "module.h"
#include "obj.h"
#include "modstat.h"
struct module_stat *module_stat;
size_t n_module_stat;
char *module_name_list;
size_t l_module_name_list;
struct module_symbol *ksyms;
size_t nksyms;
int k_new_syscalls;
static void *old_kernsym;
/************************************************************************/
static void drop(void)
{
/*
* Clean the slate for multiple runs
*/
if (module_stat) {
struct module_stat *m;
int i;
for (i = 0, m = module_stat; i < n_module_stat; ++i, ++m) {
if (m->syms)
free(m->syms);
if (m->refs)
free(m->refs);
}
free(module_stat);
module_stat = NULL;
n_module_stat = 0;
}
if (module_name_list) {
free(module_name_list);
module_name_list = NULL;
l_module_name_list = 0;
}
if (ksyms) {
free(ksyms);
ksyms = NULL;
nksyms = 0;
}
if (old_kernsym) {
free(old_kernsym);
old_kernsym = NULL;
}
}
static int new_get_kernel_info(int type)
{
struct module_stat *modules;
struct module_stat *m;
struct module_symbol *syms;
struct module_symbol *s;
size_t ret;
size_t bufsize;
size_t nmod;
size_t nsyms;
size_t i;
size_t j;
char *module_names;
char *mn;
drop();
/*
* Collect the loaded modules
*/
module_names = xmalloc(bufsize = 256);
while (query_module(NULL, QM_MODULES, module_names, bufsize, &ret)) {
if (errno != ENOSPC) {
error("QM_MODULES: %m\n");
return 0;
}
module_names = xrealloc(module_names, bufsize = ret);
}
module_name_list = module_names;
l_module_name_list = bufsize;
n_module_stat = nmod = ret;
module_stat = modules = xmalloc(nmod * sizeof(struct module_stat));
memset(modules, 0, nmod * sizeof(struct module_stat));
/* Collect the info from the modules */
for (i = 0, mn = module_names, m = modules;
i < nmod;
++i, ++m, mn += strlen(mn) + 1) {
struct module_info info;
m->name = mn;
if (query_module(mn, QM_INFO, &info, sizeof(info), &ret)) {
if (errno == ENOENT) {
/* The module was removed out from underneath us. */
m->flags = NEW_MOD_DELETED;
continue;
}
/* else oops */
error("module %s: QM_INFO: %m", mn);
return 0;
}
m->addr = info.addr;
if (type & K_INFO) {
m->size = info.size;
m->flags = info.flags;
m->usecount = info.usecount;
m->modstruct = info.addr;
}
if (type & K_REFS) {
int mm;
char *mrefs;
char *mr;
mrefs = xmalloc(bufsize = 64);
while (query_module(mn, QM_REFS, mrefs, bufsize, &ret)) {
if (errno != ENOSPC) {
error("QM_REFS: %m");
return 1;
}
mrefs = xrealloc(mrefs, bufsize = ret);
}
for (j = 0, mr = mrefs;
j < ret;
++j, mr += strlen(mr) + 1) {
for (mm = 0; mm < i; ++mm) {
if (strcmp(mr, module_stat[mm].name) == 0) {
m->nrefs += 1;
m->refs = xrealloc(m->refs, m->nrefs * sizeof(struct module_stat **));
m->refs[m->nrefs - 1] = module_stat + mm;
break;
}
}
}
free(mrefs);
}
if (type & K_SYMBOLS) { /* Want info about symbols */
syms = xmalloc(bufsize = 1024);
while (query_module(mn, QM_SYMBOLS, syms, bufsize, &ret)) {
if (errno == ENOSPC) {
syms = xrealloc(syms, bufsize = ret);
continue;
}
if (errno == ENOENT) {
/*
* The module was removed out
* from underneath us.
*/
m->flags = NEW_MOD_DELETED;
free(syms);
goto next;
} else {
error("module %s: QM_SYMBOLS: %m", mn);
return 0;
}
}
nsyms = ret;
m->nsyms = nsyms;
m->syms = syms;
/* Convert string offsets to string pointers */
for (j = 0, s = syms; j < nsyms; ++j, ++s)
s->name += (unsigned long) syms;
}
next:;
}
if (type & K_SYMBOLS) { /* Want info about symbols */
/* Collect the kernel's symbols. */
syms = xmalloc(bufsize = 16 * 1024);
while (query_module(NULL, QM_SYMBOLS, syms, bufsize, &ret)) {
if (errno != ENOSPC) {
error("kernel: QM_SYMBOLS: %m");
return 0;
}
syms = xrealloc(syms, bufsize = ret);
}
nksyms = nsyms = ret;
ksyms = syms;
/* Convert string offsets to string pointers */
for (j = 0, s = syms; j < nsyms; ++j, ++s)
s->name += (unsigned long) syms;
}
return 1;
}
int get_kernel_info(int type)
{
k_new_syscalls = !query_module(NULL, 0, NULL, 0, NULL);
return new_get_kernel_info(type);
}
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