/* 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_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_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 void __check_printsym_format(const char *fmt, ...)
  __attribute__((format(printf,1,2)));
  static inline 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
  ", (void *) ip, (void *) ip);

  }

  #endif /*_LINUX_KALLSYMS_H*/