along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/module.h>
+#include <linux/export.h>
#include <linux/moduleloader.h>
#include <linux/ftrace_event.h>
#include <linux/init.h>
#define CREATE_TRACE_POINTS
#include <trace/events/module.h>
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(fmt , a...)
-#endif
-
#ifndef ARCH_SHF_SMALL
#define ARCH_SHF_SMALL 0
#endif
unsigned long len;
Elf_Shdr *sechdrs;
char *secstrings, *strtab;
- unsigned long *strmap;
unsigned long symoffs, stroffs;
struct _ddebug *debug;
unsigned int num_debug;
return fsa.sym;
}
- DEBUGP("Failed to find symbol %s\n", name);
+ pr_debug("Failed to find symbol %s\n", name);
return NULL;
}
EXPORT_SYMBOL_GPL(find_symbol);
list_for_each_entry(use, &b->source_list, source_list) {
if (use->source == a) {
- DEBUGP("%s uses %s!\n", a->name, b->name);
+ pr_debug("%s uses %s!\n", a->name, b->name);
return 1;
}
}
- DEBUGP("%s does not use %s!\n", a->name, b->name);
+ pr_debug("%s does not use %s!\n", a->name, b->name);
return 0;
}
{
struct module_use *use;
- DEBUGP("Allocating new usage for %s.\n", a->name);
+ pr_debug("Allocating new usage for %s.\n", a->name);
use = kmalloc(sizeof(*use), GFP_ATOMIC);
if (!use) {
printk(KERN_WARNING "%s: out of memory loading\n", a->name);
mutex_lock(&module_mutex);
list_for_each_entry_safe(use, tmp, &mod->target_list, target_list) {
struct module *i = use->target;
- DEBUGP("%s unusing %s\n", mod->name, i->name);
+ pr_debug("%s unusing %s\n", mod->name, i->name);
module_put(i);
list_del(&use->source_list);
list_del(&use->target_list);
}
}
-unsigned int module_refcount(struct module *mod)
+unsigned long module_refcount(struct module *mod)
{
- unsigned int incs = 0, decs = 0;
+ unsigned long incs = 0, decs = 0;
int cpu;
for_each_possible_cpu(cpu)
/* Since we might sleep for some time, release the mutex first */
mutex_unlock(&module_mutex);
for (;;) {
- DEBUGP("Looking at refcount...\n");
+ pr_debug("Looking at refcount...\n");
set_current_state(TASK_UNINTERRUPTIBLE);
if (module_refcount(mod) == 0)
break;
if (mod->state != MODULE_STATE_LIVE) {
/* FIXME: if (force), slam module count and wake up
waiter --RR */
- DEBUGP("%s already dying\n", mod->name);
+ pr_debug("%s already dying\n", mod->name);
ret = -EBUSY;
goto out;
}
struct module_use *use;
int printed_something = 0;
- seq_printf(m, " %u ", module_refcount(mod));
+ seq_printf(m, " %lu ", module_refcount(mod));
/* Always include a trailing , so userspace can differentiate
between this and the old multi-field proc format. */
static ssize_t show_refcnt(struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
- return sprintf(buffer, "%u\n", module_refcount(mk->mod));
+ return sprintf(buffer, "%lu\n", module_refcount(mk->mod));
}
-static struct module_attribute refcnt = {
- .attr = { .name = "refcnt", .mode = 0444 },
- .show = show_refcnt,
-};
+static struct module_attribute modinfo_refcnt =
+ __ATTR(refcnt, 0444, show_refcnt, NULL);
void module_put(struct module *module)
{
}
#endif /* CONFIG_MODULE_UNLOAD */
+static size_t module_flags_taint(struct module *mod, char *buf)
+{
+ size_t l = 0;
+
+ if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE))
+ buf[l++] = 'P';
+ if (mod->taints & (1 << TAINT_OOT_MODULE))
+ buf[l++] = 'O';
+ if (mod->taints & (1 << TAINT_FORCED_MODULE))
+ buf[l++] = 'F';
+ if (mod->taints & (1 << TAINT_CRAP))
+ buf[l++] = 'C';
+ /*
+ * TAINT_FORCED_RMMOD: could be added.
+ * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
+ * apply to modules.
+ */
+ return l;
+}
+
static ssize_t show_initstate(struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
return sprintf(buffer, "%s\n", state);
}
-static struct module_attribute initstate = {
- .attr = { .name = "initstate", .mode = 0444 },
- .show = show_initstate,
-};
+static struct module_attribute modinfo_initstate =
+ __ATTR(initstate, 0444, show_initstate, NULL);
+
+static ssize_t store_uevent(struct module_attribute *mattr,
+ struct module_kobject *mk,
+ const char *buffer, size_t count)
+{
+ enum kobject_action action;
+
+ if (kobject_action_type(buffer, count, &action) == 0)
+ kobject_uevent(&mk->kobj, action);
+ return count;
+}
+
+struct module_attribute module_uevent =
+ __ATTR(uevent, 0200, NULL, store_uevent);
+
+static ssize_t show_coresize(struct module_attribute *mattr,
+ struct module_kobject *mk, char *buffer)
+{
+ return sprintf(buffer, "%u\n", mk->mod->core_size);
+}
+
+static struct module_attribute modinfo_coresize =
+ __ATTR(coresize, 0444, show_coresize, NULL);
+
+static ssize_t show_initsize(struct module_attribute *mattr,
+ struct module_kobject *mk, char *buffer)
+{
+ return sprintf(buffer, "%u\n", mk->mod->init_size);
+}
+
+static struct module_attribute modinfo_initsize =
+ __ATTR(initsize, 0444, show_initsize, NULL);
+
+static ssize_t show_taint(struct module_attribute *mattr,
+ struct module_kobject *mk, char *buffer)
+{
+ size_t l;
+
+ l = module_flags_taint(mk->mod, buffer);
+ buffer[l++] = '\n';
+ return l;
+}
+
+static struct module_attribute modinfo_taint =
+ __ATTR(taint, 0444, show_taint, NULL);
static struct module_attribute *modinfo_attrs[] = {
+ &module_uevent,
&modinfo_version,
&modinfo_srcversion,
- &initstate,
+ &modinfo_initstate,
+ &modinfo_coresize,
+ &modinfo_initsize,
+ &modinfo_taint,
#ifdef CONFIG_MODULE_UNLOAD
- &refcnt,
+ &modinfo_refcnt,
#endif
NULL,
};
if (versions[i].crc == maybe_relocated(*crc, crc_owner))
return 1;
- DEBUGP("Found checksum %lX vs module %lX\n",
+ pr_debug("Found checksum %lX vs module %lX\n",
maybe_relocated(*crc, crc_owner), versions[i].crc);
goto bad_version;
}
case SHN_COMMON:
/* We compiled with -fno-common. These are not
supposed to happen. */
- DEBUGP("Common symbol: %s\n", name);
+ pr_debug("Common symbol: %s\n", name);
printk("%s: please compile with -fno-common\n",
mod->name);
ret = -ENOEXEC;
case SHN_ABS:
/* Don't need to do anything */
- DEBUGP("Absolute symbol: 0x%08lx\n",
+ pr_debug("Absolute symbol: 0x%08lx\n",
(long)sym[i].st_value);
break;
for (i = 0; i < info->hdr->e_shnum; i++)
info->sechdrs[i].sh_entsize = ~0UL;
- DEBUGP("Core section allocation order:\n");
+ pr_debug("Core section allocation order:\n");
for (m = 0; m < ARRAY_SIZE(masks); ++m) {
for (i = 0; i < info->hdr->e_shnum; ++i) {
Elf_Shdr *s = &info->sechdrs[i];
|| strstarts(sname, ".init"))
continue;
s->sh_entsize = get_offset(mod, &mod->core_size, s, i);
- DEBUGP("\t%s\n", name);
+ pr_debug("\t%s\n", sname);
}
switch (m) {
case 0: /* executable */
}
}
- DEBUGP("Init section allocation order:\n");
+ pr_debug("Init section allocation order:\n");
for (m = 0; m < ARRAY_SIZE(masks); ++m) {
for (i = 0; i < info->hdr->e_shnum; ++i) {
Elf_Shdr *s = &info->sechdrs[i];
continue;
s->sh_entsize = (get_offset(mod, &mod->init_size, s, i)
| INIT_OFFSET_MASK);
- DEBUGP("\t%s\n", sname);
+ pr_debug("\t%s\n", sname);
}
switch (m) {
case 0: /* executable */
return true;
}
+/*
+ * We only allocate and copy the strings needed by the parts of symtab
+ * we keep. This is simple, but has the effect of making multiple
+ * copies of duplicates. We could be more sophisticated, see
+ * linux-kernel thread starting with
+ * <73defb5e4bca04a6431392cc341112b1@localhost>.
+ */
static void layout_symtab(struct module *mod, struct load_info *info)
{
Elf_Shdr *symsect = info->sechdrs + info->index.sym;
Elf_Shdr *strsect = info->sechdrs + info->index.str;
const Elf_Sym *src;
- unsigned int i, nsrc, ndst;
+ unsigned int i, nsrc, ndst, strtab_size;
/* Put symbol section at end of init part of module. */
symsect->sh_flags |= SHF_ALLOC;
symsect->sh_entsize = get_offset(mod, &mod->init_size, symsect,
info->index.sym) | INIT_OFFSET_MASK;
- DEBUGP("\t%s\n", info->secstrings + symsect->sh_name);
+ pr_debug("\t%s\n", info->secstrings + symsect->sh_name);
src = (void *)info->hdr + symsect->sh_offset;
nsrc = symsect->sh_size / sizeof(*src);
- for (ndst = i = 1; i < nsrc; ++i, ++src)
- if (is_core_symbol(src, info->sechdrs, info->hdr->e_shnum)) {
- unsigned int j = src->st_name;
- while (!__test_and_set_bit(j, info->strmap)
- && info->strtab[j])
- ++j;
- ++ndst;
+ /* Compute total space required for the core symbols' strtab. */
+ for (ndst = i = strtab_size = 1; i < nsrc; ++i, ++src)
+ if (is_core_symbol(src, info->sechdrs, info->hdr->e_shnum)) {
+ strtab_size += strlen(&info->strtab[src->st_name]) + 1;
+ ndst++;
}
/* Append room for core symbols at end of core part. */
info->symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1);
- mod->core_size = info->symoffs + ndst * sizeof(Elf_Sym);
+ info->stroffs = mod->core_size = info->symoffs + ndst * sizeof(Elf_Sym);
+ mod->core_size += strtab_size;
/* Put string table section at end of init part of module. */
strsect->sh_flags |= SHF_ALLOC;
strsect->sh_entsize = get_offset(mod, &mod->init_size, strsect,
info->index.str) | INIT_OFFSET_MASK;
- DEBUGP("\t%s\n", info->secstrings + strsect->sh_name);
-
- /* Append room for core symbols' strings at end of core part. */
- info->stroffs = mod->core_size;
- __set_bit(0, info->strmap);
- mod->core_size += bitmap_weight(info->strmap, strsect->sh_size);
+ pr_debug("\t%s\n", info->secstrings + strsect->sh_name);
}
static void add_kallsyms(struct module *mod, const struct load_info *info)
mod->symtab[i].st_info = elf_type(&mod->symtab[i], info);
mod->core_symtab = dst = mod->module_core + info->symoffs;
+ mod->core_strtab = s = mod->module_core + info->stroffs;
src = mod->symtab;
*dst = *src;
+ *s++ = 0;
for (ndst = i = 1; i < mod->num_symtab; ++i, ++src) {
if (!is_core_symbol(src, info->sechdrs, info->hdr->e_shnum))
continue;
+
dst[ndst] = *src;
- dst[ndst].st_name = bitmap_weight(info->strmap,
- dst[ndst].st_name);
- ++ndst;
+ dst[ndst++].st_name = s - mod->core_strtab;
+ s += strlcpy(s, &mod->strtab[src->st_name], KSYM_NAME_LEN) + 1;
}
mod->core_num_syms = ndst;
-
- mod->core_strtab = s = mod->module_core + info->stroffs;
- for (*s = 0, i = 1; i < info->sechdrs[info->index.str].sh_size; ++i)
- if (test_bit(i, info->strmap))
- *++s = mod->strtab[i];
}
#else
static inline void layout_symtab(struct module *mod, struct load_info *info)
return -ENOEXEC;
}
+ if (!get_modinfo(info, "intree"))
+ add_taint_module(mod, TAINT_OOT_MODULE);
+
if (get_modinfo(info, "staging")) {
add_taint_module(mod, TAINT_CRAP);
printk(KERN_WARNING "%s: module is from the staging directory,"
mod->module_init = ptr;
/* Transfer each section which specifies SHF_ALLOC */
- DEBUGP("final section addresses:\n");
+ pr_debug("final section addresses:\n");
for (i = 0; i < info->hdr->e_shnum; i++) {
void *dest;
Elf_Shdr *shdr = &info->sechdrs[i];
memcpy(dest, (void *)shdr->sh_addr, shdr->sh_size);
/* Update sh_addr to point to copy in image. */
shdr->sh_addr = (unsigned long)dest;
- DEBUGP("\t0x%lx %s\n",
- shdr->sh_addr, info->secstrings + shdr->sh_name);
+ pr_debug("\t0x%lx %s\n",
+ (long)shdr->sh_addr, info->secstrings + shdr->sh_name);
}
return 0;
this is done generically; there doesn't appear to be any
special cases for the architectures. */
layout_sections(mod, info);
-
- info->strmap = kzalloc(BITS_TO_LONGS(info->sechdrs[info->index.str].sh_size)
- * sizeof(long), GFP_KERNEL);
- if (!info->strmap) {
- err = -ENOMEM;
- goto free_percpu;
- }
layout_symtab(mod, info);
/* Allocate and move to the final place */
err = move_module(mod, info);
if (err)
- goto free_strmap;
+ goto free_percpu;
/* Module has been copied to its final place now: return it. */
mod = (void *)info->sechdrs[info->index.mod].sh_addr;
kmemleak_load_module(mod, info);
return mod;
-free_strmap:
- kfree(info->strmap);
free_percpu:
percpu_modfree(mod);
out:
/* mod is no longer valid after this! */
static void module_deallocate(struct module *mod, struct load_info *info)
{
- kfree(info->strmap);
percpu_modfree(mod);
module_free(mod, mod->module_init);
module_free(mod, mod->module_core);
struct module *mod;
long err;
- DEBUGP("load_module: umod=%p, len=%lu, uargs=%p\n",
+ pr_debug("load_module: umod=%p, len=%lu, uargs=%p\n",
umod, len, uargs);
/* Copy in the blobs from userspace, check they are vaguely sane. */
}
/* This has to be done once we're sure module name is unique. */
- if (!mod->taints || mod->taints == (1U<<TAINT_CRAP))
- dynamic_debug_setup(info.debug, info.num_debug);
+ dynamic_debug_setup(info.debug, info.num_debug);
/* Find duplicate symbols */
err = verify_export_symbols(mod);
if (err < 0)
goto unlink;
- /* Get rid of temporary copy and strmap. */
- kfree(info.strmap);
+ /* Get rid of temporary copy. */
free_copy(&info);
/* Done! */
module_bug_cleanup(mod);
ddebug:
- if (!mod->taints || mod->taints == (1U<<TAINT_CRAP))
- dynamic_debug_remove(info.debug);
+ dynamic_debug_remove(info.debug);
unlock:
mutex_unlock(&module_mutex);
synchronize_sched();
mod->state == MODULE_STATE_GOING ||
mod->state == MODULE_STATE_COMING) {
buf[bx++] = '(';
- if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE))
- buf[bx++] = 'P';
- if (mod->taints & (1 << TAINT_FORCED_MODULE))
- buf[bx++] = 'F';
- if (mod->taints & (1 << TAINT_CRAP))
- buf[bx++] = 'C';
- /*
- * TAINT_FORCED_RMMOD: could be added.
- * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
- * apply to modules.
- */
-
+ bx += module_flags_taint(mod, buf + bx);
/* Show a - for module-is-being-unloaded */
if (mod->state == MODULE_STATE_GOING)
buf[bx++] = '-';
}
EXPORT_SYMBOL(module_layout);
#endif
-
-#ifdef CONFIG_TRACEPOINTS
-void module_update_tracepoints(void)
-{
- struct module *mod;
-
- mutex_lock(&module_mutex);
- list_for_each_entry(mod, &modules, list)
- if (!mod->taints)
- tracepoint_update_probe_range(mod->tracepoints_ptrs,
- mod->tracepoints_ptrs + mod->num_tracepoints);
- mutex_unlock(&module_mutex);
-}
-
-/*
- * Returns 0 if current not found.
- * Returns 1 if current found.
- */
-int module_get_iter_tracepoints(struct tracepoint_iter *iter)
-{
- struct module *iter_mod;
- int found = 0;
-
- mutex_lock(&module_mutex);
- list_for_each_entry(iter_mod, &modules, list) {
- if (!iter_mod->taints) {
- /*
- * Sorted module list
- */
- if (iter_mod < iter->module)
- continue;
- else if (iter_mod > iter->module)
- iter->tracepoint = NULL;
- found = tracepoint_get_iter_range(&iter->tracepoint,
- iter_mod->tracepoints_ptrs,
- iter_mod->tracepoints_ptrs
- + iter_mod->num_tracepoints);
- if (found) {
- iter->module = iter_mod;
- break;
- }
- }
- }
- mutex_unlock(&module_mutex);
- return found;
-}
-#endif
projects / linux-flexiantxendom0-3.2.10.git / blobdiff