1 files changed, 28 insertions, 0 deletions

diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index 559deca5ed15..2565e1b6dd7b 100644
--- a/kernel/ksysfs.c
+++ b/kernel/ksysfs.c
@@ -62,6 +62,28 @@ static ssize_t kexec_crash_loaded_show(struct kset *kset, char *page)
 KERNEL_ATTR_RO(kexec_crash_loaded);
 #endif /* CONFIG_KEXEC */
 
+/*
+ * Make /sys/kernel/notes give the raw contents of our kernel .notes section.
+ */
+extern const char __start_notes __attribute__((weak));
+extern const char __stop_notes __attribute__((weak));
+#define notes_size (&__stop_notes - &__start_notes)
+
+static ssize_t notes_read(struct kobject *kobj, struct bin_attribute *bin_attr,
+                          char *buf, loff_t off, size_t count)
+{
+        memcpy(buf, &__start_notes + off, count);
+        return count;
+}
+
+static struct bin_attribute notes_attr = {
+        .attr = {
+                .name = "notes",
+                .mode = S_IRUGO,
+        },
+        .read = &notes_read,
+};
+
 decl_subsys(kernel, NULL, NULL);
 EXPORT_SYMBOL_GPL(kernel_subsys);
 
@@ -88,6 +110,12 @@ static int __init ksysfs_init(void)
                 error = sysfs_create_group(&kernel_subsys.kobj,
                                            &kernel_attr_group);
 
+        if (!error && notes_size > 0) {
+                notes_attr.size = notes_size;
+                error = sysfs_create_bin_file(&kernel_subsys.kobj,
+                                              &notes_attr);
+        }
+
         return error;
 }