1 files changed, 128 insertions, 0 deletions
diff --git a/kernel/include/linux/kallsyms.h b/kernel/include/linux/kallsyms.h
new file mode 100644
index 000000000..6883e197a
--- /dev/null
+++ b/kernel/include/linux/kallsyms.h
@@ -0,0 +1,128 @@
+/* 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/errno.h>
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+
+#define KSYM_NAME_LEN 128
+#define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + (KSYM_NAME_LEN - 1) + \
+			 2*(BITS_PER_LONG*3/10) + (MODULE_NAME_LEN - 1) + 1)
+
+struct module;
+
+#ifdef CONFIG_KALLSYMS
+/* Lookup the address for a symbol. Returns 0 if not found. */
+unsigned long kallsyms_lookup_name(const char *name);
+
+/* Call a function on each kallsyms symbol in the core kernel */
+int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
+				      unsigned long),
+			    void *data);
+
+extern int kallsyms_lookup_size_offset(unsigned long addr,
+				  unsigned long *symbolsize,
+				  unsigned long *offset);
+
+/* 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);
+
+/* Look up a kernel symbol and return it in a text buffer. */
+extern int sprint_symbol(char *buffer, unsigned long address);
+extern int sprint_symbol_no_offset(char *buffer, unsigned long address);
+extern int sprint_backtrace(char *buffer, unsigned long address);
+
+/* Look up a kernel symbol and print it to the kernel messages. */
+extern void __print_symbol(const char *fmt, unsigned long address);
+
+int lookup_symbol_name(unsigned long addr, char *symname);
+int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
+
+#else /* !CONFIG_KALLSYMS */
+
+static inline unsigned long kallsyms_lookup_name(const char *name)
+{
+	return 0;
+}
+
+static inline int kallsyms_on_each_symbol(int (*fn)(void *, const char *,
+						    struct module *,
+						    unsigned long),
+					  void *data)
+{
+	return 0;
+}
+
+static inline int kallsyms_lookup_size_offset(unsigned long addr,
+					      unsigned long *symbolsize,
+					      unsigned long *offset)
+{
+	return 0;
+}
+
+static inline const char *kallsyms_lookup(unsigned long addr,
+					  unsigned long *symbolsize,
+					  unsigned long *offset,
+					  char **modname, char *namebuf)
+{
+	return NULL;
+}
+
+static inline int sprint_symbol(char *buffer, unsigned long addr)
+{
+	*buffer = '\0';
+	return 0;
+}
+
+static inline int sprint_symbol_no_offset(char *buffer, unsigned long addr)
+{
+	*buffer = '\0';
+	return 0;
+}
+
+static inline int sprint_backtrace(char *buffer, unsigned long addr)
+{
+	*buffer = '\0';
+	return 0;
+}
+
+static inline int lookup_symbol_name(unsigned long addr, char *symname)
+{
+	return -ERANGE;
+}
+
+static inline int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
+{
+	return -ERANGE;
+}
+
+/* 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 __printf(1, 2)
+void __check_printsym_format(const char *fmt, ...)
+{
+}
+
+static inline void print_symbol(const char *fmt, unsigned long addr)
+{
+	__check_printsym_format(fmt, "");
+	__print_symbol(fmt, (unsigned long)
+		       __builtin_extract_return_addr((void *)addr));
+}
+
+static inline void print_ip_sym(unsigned long ip)
+{
+	printk("[<%p>] %pS\n", (void *) ip, (void *) ip);
+}
+
+#endif /*_LINUX_KALLSYMS_H*/