1 files changed, 67 insertions, 0 deletions

diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
new file mode 100644
index 000000000000..9bbd04092365
--- /dev/null
+++ b/include/linux/kallsyms.h
@@ -0,0 +1,67 @@
+/* Rewritten and vastly simplified by Rusty Russell for in-kernel
+ * module loader:
+ *   Copyright 2002 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation
+ */
+#ifndef _LINUX_KALLSYMS_H
+#define _LINUX_KALLSYMS_H
+
+#include <linux/config.h>
+
+#define KSYM_NAME_LEN 127
+
+#ifdef CONFIG_KALLSYMS
+/* Lookup the address for a symbol. Returns 0 if not found. */
+unsigned long kallsyms_lookup_name(const char *name);
+
+/* Lookup an address.  modname is set to NULL if it's in the kernel. */
+const char *kallsyms_lookup(unsigned long addr,
+                            unsigned long *symbolsize,
+                            unsigned long *offset,
+                            char **modname, char *namebuf);
+
+/* Replace "%s" in format with address, if found */
+extern void __print_symbol(const char *fmt, unsigned long address);
+
+#else /* !CONFIG_KALLSYMS */
+
+static inline unsigned long kallsyms_lookup_name(const char *name)
+{
+        return 0;
+}
+
+static inline const char *kallsyms_lookup(unsigned long addr,
+                                          unsigned long *symbolsize,
+                                          unsigned long *offset,
+                                          char **modname, char *namebuf)
+{
+        return NULL;
+}
+
+/* Stupid that this does nothing, but I didn't create this mess. */
+#define __print_symbol(fmt, addr)
+#endif /*CONFIG_KALLSYMS*/
+
+/* This macro allows us to keep printk typechecking */
+static void __check_printsym_format(const char *fmt, ...)
+__attribute__((format(printf,1,2)));
+static inline void __check_printsym_format(const char *fmt, ...)
+{
+}
+/* ia64 and ppc64 use function descriptors, which contain the real address */
+#if defined(CONFIG_IA64) || defined(CONFIG_PPC64)
+#define print_fn_descriptor_symbol(fmt, addr)           \
+do {                                            \
+        unsigned long *__faddr = (unsigned long*) addr;         \
+        print_symbol(fmt, __faddr[0]);          \
+} while (0)
+#else
+#define print_fn_descriptor_symbol(fmt, addr) print_symbol(fmt, addr)
+#endif
+
+#define print_symbol(fmt, addr)                 \
+do {                                            \
+        __check_printsym_format(fmt, "");       \
+        __print_symbol(fmt, addr);              \
+} while(0)
+
+#endif /*_LINUX_KALLSYMS_H*/