/* 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

  
  #define KSYM_NAME_LEN 127

  #define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + KSYM_NAME_LEN +	\
  			 2*(BITS_PER_LONG*3/10) + MODULE_NAME_LEN + 1)

  
  #ifdef CONFIG_KALLSYMS
  /* Lookup the address for a symbol. Returns 0 if not found. */
  unsigned long kallsyms_lookup_name(const char *name);

  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);
  
  /* 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_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 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, ...)
  {
  }
  /* 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

  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));
  }

  #ifndef CONFIG_64BIT
  #define print_ip_sym(ip)		\
  do {					\
  	printk("[<%08lx>]", ip);	\
  	print_symbol(" %s
  ", ip);	\
  } while(0)
  #else
  #define print_ip_sym(ip)		\
  do {					\
  	printk("[<%016lx>]", ip);	\
  	print_symbol(" %s
  ", ip);	\
  } while(0)
  #endif

  #endif /*_LINUX_KALLSYMS_H*/