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-rw-r--r--kernel/module.c68
1 files changed, 49 insertions, 19 deletions
diff --git a/kernel/module.c b/kernel/module.c
index a389b423c279..3202c9950073 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -105,7 +105,7 @@ void __module_put_and_exit(struct module *mod, long code)
do_exit(code);
}
EXPORT_SYMBOL(__module_put_and_exit);
-
+
/* Find a module section: 0 means not found. */
static unsigned int find_sec(Elf_Ehdr *hdr,
Elf_Shdr *sechdrs,
@@ -179,7 +179,7 @@ static unsigned long __find_symbol(const char *name,
struct module *mod;
const struct kernel_symbol *ks;
- /* Core kernel first. */
+ /* Core kernel first. */
*owner = NULL;
ks = lookup_symbol(name, __start___ksymtab, __stop___ksymtab);
if (ks) {
@@ -231,7 +231,7 @@ static unsigned long __find_symbol(const char *name,
return ks->value;
}
- /* Now try modules. */
+ /* Now try modules. */
list_for_each_entry(mod, &modules, list) {
*owner = mod;
ks = lookup_symbol(name, mod->syms, mod->syms + mod->num_syms);
@@ -285,7 +285,7 @@ static unsigned long __find_symbol(const char *name,
}
}
DEBUGP("Failed to find symbol %s\n", name);
- return 0;
+ return 0;
}
/* Search for module by name: must hold module_mutex. */
@@ -441,7 +441,7 @@ static int percpu_modinit(void)
}
return 0;
-}
+}
__initcall(percpu_modinit);
#else /* ... !CONFIG_SMP */
static inline void *percpu_modalloc(unsigned long size, unsigned long align,
@@ -483,8 +483,8 @@ static int modinfo_##field##_exists(struct module *mod) \
} \
static void free_modinfo_##field(struct module *mod) \
{ \
- kfree(mod->field); \
- mod->field = NULL; \
+ kfree(mod->field); \
+ mod->field = NULL; \
} \
static struct module_attribute modinfo_##field = { \
.attr = { .name = __stringify(field), .mode = 0444 }, \
@@ -990,7 +990,7 @@ static void add_sect_attrs(struct module *mod, unsigned int nsect,
struct module_sect_attrs *sect_attrs;
struct module_sect_attr *sattr;
struct attribute **gattr;
-
+
/* Count loaded sections and allocate structures */
for (i = 0; i < nsect; i++)
if (sechdrs[i].sh_flags & SHF_ALLOC)
@@ -1348,14 +1348,14 @@ static int verify_export_symbols(struct module *mod)
const unsigned long *crc;
for (i = 0; i < mod->num_syms; i++)
- if (__find_symbol(mod->syms[i].name, &owner, &crc, 1)) {
+ if (__find_symbol(mod->syms[i].name, &owner, &crc, 1)) {
name = mod->syms[i].name;
ret = -ENOEXEC;
goto dup;
}
for (i = 0; i < mod->num_gpl_syms; i++)
- if (__find_symbol(mod->gpl_syms[i].name, &owner, &crc, 1)) {
+ if (__find_symbol(mod->gpl_syms[i].name, &owner, &crc, 1)) {
name = mod->gpl_syms[i].name;
ret = -ENOEXEC;
goto dup;
@@ -1673,6 +1673,8 @@ static struct module *load_module(void __user *umod,
unsigned int unusedcrcindex;
unsigned int unusedgplindex;
unsigned int unusedgplcrcindex;
+ unsigned int markersindex;
+ unsigned int markersstringsindex;
struct module *mod;
long err = 0;
void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
@@ -1929,7 +1931,7 @@ static struct module *load_module(void __user *umod,
mod->unused_crcs = (void *)sechdrs[unusedgplcrcindex].sh_addr;
#ifdef CONFIG_MODVERSIONS
- if ((mod->num_syms && !crcindex) ||
+ if ((mod->num_syms && !crcindex) ||
(mod->num_gpl_syms && !gplcrcindex) ||
(mod->num_gpl_future_syms && !gplfuturecrcindex) ||
(mod->num_unused_syms && !unusedcrcindex) ||
@@ -1939,6 +1941,9 @@ static struct module *load_module(void __user *umod,
add_taint_module(mod, TAINT_FORCED_MODULE);
}
#endif
+ markersindex = find_sec(hdr, sechdrs, secstrings, "__markers");
+ markersstringsindex = find_sec(hdr, sechdrs, secstrings,
+ "__markers_strings");
/* Now do relocations. */
for (i = 1; i < hdr->e_shnum; i++) {
@@ -1961,6 +1966,11 @@ static struct module *load_module(void __user *umod,
if (err < 0)
goto cleanup;
}
+#ifdef CONFIG_MARKERS
+ mod->markers = (void *)sechdrs[markersindex].sh_addr;
+ mod->num_markers =
+ sechdrs[markersindex].sh_size / sizeof(*mod->markers);
+#endif
/* Find duplicate symbols */
err = verify_export_symbols(mod);
@@ -1979,6 +1989,11 @@ static struct module *load_module(void __user *umod,
add_kallsyms(mod, sechdrs, symindex, strindex, secstrings);
+#ifdef CONFIG_MARKERS
+ if (!mod->taints)
+ marker_update_probe_range(mod->markers,
+ mod->markers + mod->num_markers, NULL, NULL);
+#endif
err = module_finalize(hdr, sechdrs, mod);
if (err < 0)
goto cleanup;
@@ -2016,7 +2031,7 @@ static struct module *load_module(void __user *umod,
if (err < 0)
goto arch_cleanup;
- err = mod_sysfs_setup(mod,
+ err = mod_sysfs_setup(mod,
(struct kernel_param *)
sechdrs[setupindex].sh_addr,
sechdrs[setupindex].sh_size
@@ -2028,8 +2043,8 @@ static struct module *load_module(void __user *umod,
/* Size of section 0 is 0, so this works well if no unwind info. */
mod->unwind_info = unwind_add_table(mod,
- (void *)sechdrs[unwindex].sh_addr,
- sechdrs[unwindex].sh_size);
+ (void *)sechdrs[unwindex].sh_addr,
+ sechdrs[unwindex].sh_size);
/* Get rid of temporary copy */
vfree(hdr);
@@ -2146,7 +2161,7 @@ static inline int within(unsigned long addr, void *start, unsigned long size)
*/
static inline int is_arm_mapping_symbol(const char *str)
{
- return str[0] == '$' && strchr("atd", str[1])
+ return str[0] == '$' && strchr("atd", str[1])
&& (str[2] == '\0' || str[2] == '.');
}
@@ -2161,11 +2176,11 @@ static const char *get_ksymbol(struct module *mod,
/* At worse, next value is at end of module */
if (within(addr, mod->module_init, mod->init_size))
nextval = (unsigned long)mod->module_init+mod->init_text_size;
- else
+ else
nextval = (unsigned long)mod->module_core+mod->core_text_size;
/* Scan for closest preceeding symbol, and next symbol. (ELF
- starts real symbols at 1). */
+ starts real symbols at 1). */
for (i = 1; i < mod->num_symtab; i++) {
if (mod->symtab[i].st_shndx == SHN_UNDEF)
continue;
@@ -2407,7 +2422,7 @@ const struct exception_table_entry *search_module_extables(unsigned long addr)
list_for_each_entry(mod, &modules, list) {
if (mod->num_exentries == 0)
continue;
-
+
e = search_extable(mod->extable,
mod->extable + mod->num_exentries - 1,
addr);
@@ -2417,7 +2432,7 @@ const struct exception_table_entry *search_module_extables(unsigned long addr)
preempt_enable();
/* Now, if we found one, we are running inside it now, hence
- we cannot unload the module, hence no refcnt needed. */
+ we cannot unload the module, hence no refcnt needed. */
return e;
}
@@ -2570,3 +2585,18 @@ EXPORT_SYMBOL(module_remove_driver);
void struct_module(struct module *mod) { return; }
EXPORT_SYMBOL(struct_module);
#endif
+
+#ifdef CONFIG_MARKERS
+void module_update_markers(struct module *probe_module, int *refcount)
+{
+ struct module *mod;
+
+ mutex_lock(&module_mutex);
+ list_for_each_entry(mod, &modules, list)
+ if (!mod->taints)
+ marker_update_probe_range(mod->markers,
+ mod->markers + mod->num_markers,
+ probe_module, refcount);
+ mutex_unlock(&module_mutex);
+}
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 05:17:19 +0100