X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=kernel%2Fextable.c;h=e136ed8d82ba56ab81283a48fe3d6cfb41c23c79;hb=0c2a498fa6d33d8ca9c8a0c29039c41e1734cb9e;hp=7fe2628553172eadc0d49a3cbaf9d779b80b5a7c;hpb=5e376613899076396d0c97de67ad072587267370;p=safe%2Fjmp%2Flinux-2.6

diff --git a/kernel/extable.c b/kernel/extable.c
index 7fe2628..e136ed8 100644
--- a/kernel/extable.c
+++ b/kernel/extable.c
@@ -17,6 +17,7 @@
 */
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/ftrace.h>
 #include <asm/uaccess.h>
 #include <asm/sections.h>
 
@@ -40,19 +41,20 @@ const struct exception_table_entry *search_exception_tables(unsigned long addr)
 	return e;
 }
 
-int core_kernel_text(unsigned long addr)
+__notrace_funcgraph int core_kernel_text(unsigned long addr)
 {
 	if (addr >= (unsigned long)_stext &&
 	    addr <= (unsigned long)_etext)
 		return 1;
 
-	if (addr >= (unsigned long)_sinittext &&
+	if (system_state == SYSTEM_BOOTING &&
+	    addr >= (unsigned long)_sinittext &&
 	    addr <= (unsigned long)_einittext)
 		return 1;
 	return 0;
 }
 
-int __kernel_text_address(unsigned long addr)
+__notrace_funcgraph int __kernel_text_address(unsigned long addr)
 {
 	if (core_kernel_text(addr))
 		return 1;
@@ -65,3 +67,19 @@ int kernel_text_address(unsigned long addr)
 		return 1;
 	return module_text_address(addr) != NULL;
 }
+
+/*
+ * On some architectures (PPC64, IA64) function pointers
+ * are actually only tokens to some data that then holds the
+ * real function address. As a result, to find if a function
+ * pointer is part of the kernel text, we need to do some
+ * special dereferencing first.
+ */
+int func_ptr_is_kernel_text(void *ptr)
+{
+	unsigned long addr;
+	addr = (unsigned long) dereference_function_descriptor(ptr);
+	if (core_kernel_text(addr))
+		return 1;
+	return module_text_address(addr) != NULL;
+}