diff options
Diffstat (limited to 'kernel/extable.c')
| -rw-r--r-- | kernel/extable.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/kernel/extable.c b/kernel/extable.c index 25d39b0..7f8f263 100644 --- a/kernel/extable.c +++ b/kernel/extable.c @@ -16,6 +16,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/ftrace.h> +#include <linux/memory.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/init.h> @@ -51,6 +52,14 @@ const struct exception_table_entry *search_exception_tables(unsigned long addr) return e; } +static inline int init_kernel_text(unsigned long addr) +{ + if (addr >= (unsigned long)_sinittext && + addr <= (unsigned long)_einittext) + return 1; + return 0; +} + int core_kernel_text(unsigned long addr) { if (addr >= (unsigned long)_stext && @@ -58,8 +67,7 @@ int core_kernel_text(unsigned long addr) return 1; if (system_state == SYSTEM_BOOTING && - addr >= (unsigned long)_sinittext && - addr <= (unsigned long)_einittext) + init_kernel_text(addr)) return 1; return 0; } @@ -68,14 +76,26 @@ int __kernel_text_address(unsigned long addr) { if (core_kernel_text(addr)) return 1; - return __module_text_address(addr) != NULL; + if (is_module_text_address(addr)) + return 1; + /* + * There might be init symbols in saved stacktraces. + * Give those symbols a chance to be printed in + * backtraces (such as lockdep traces). + * + * Since we are after the module-symbols check, there's + * no danger of address overlap: + */ + if (init_kernel_text(addr)) + return 1; + return 0; } int kernel_text_address(unsigned long addr) { if (core_kernel_text(addr)) return 1; - return module_text_address(addr) != NULL; + return is_module_text_address(addr); } /* @@ -91,5 +111,5 @@ int func_ptr_is_kernel_text(void *ptr) addr = (unsigned long) dereference_function_descriptor(ptr); if (core_kernel_text(addr)) return 1; - return module_text_address(addr) != NULL; + return is_module_text_address(addr); } |