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authorRusty Russell <rusty@rustcorp.com.au>2008-01-29 17:13:22 -0500
committerRusty Russell <rusty@rustcorp.com.au>2008-01-29 17:13:23 +1100
commit6dd06c9fbe025f542bce4cdb91790c0f91962722 (patch)
tree5c946eb93f30c64fd435bdd6d1064880ef21557a /include/linux/module.h
parentbb9d3d56e792d2619cc0903df4ac01d86ac1261d (diff)
module: make module_address_lookup safe
module_address_lookup releases preemption then returns a pointer into the module space. The only user (kallsyms) copies the result, so just do that under the preempt disable. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/module.h')
-rw-r--r--include/linux/module.h22
1 files changed, 13 insertions, 9 deletions
diff --git a/include/linux/module.h b/include/linux/module.h
index c97bdb7eb957..aedc06be1de8 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -446,11 +446,14 @@ static inline void __module_get(struct module *module)
__mod ? __mod->name : "kernel"; \
})
-/* For kallsyms to ask for address resolution. NULL means not found. */
-const char *module_address_lookup(unsigned long addr,
- unsigned long *symbolsize,
- unsigned long *offset,
- char **modname);
+/* For kallsyms to ask for address resolution. namebuf should be at
+ * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
+ * found, otherwise NULL. */
+char *module_address_lookup(unsigned long addr,
+ unsigned long *symbolsize,
+ unsigned long *offset,
+ char **modname,
+ char *namebuf);
int lookup_module_symbol_name(unsigned long addr, char *symname);
int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
@@ -516,10 +519,11 @@ static inline void module_put(struct module *module)
#define module_name(mod) "kernel"
/* For kallsyms to ask for address resolution. NULL means not found. */
-static inline const char *module_address_lookup(unsigned long addr,
- unsigned long *symbolsize,
- unsigned long *offset,
- char **modname)
+static inline char *module_address_lookup(unsigned long addr,
+ unsigned long *symbolsize,
+ unsigned long *offset,
+ char **modname,
+ char *namebuf)
{
return NULL;
}