include/linux/kallsyms.h

   1 /* Rewritten and vastly simplified by Rusty Russell for in-kernel
   2  * module loader:
   3  *   Copyright 2002 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation
   4  */
   5 #ifndef _LINUX_KALLSYMS_H
   6 #define _LINUX_KALLSYMS_H
   7
   8 #include <linux/config.h>
   9
  10 #ifdef CONFIG_KALLSYMS
  11 /* Lookup the address for a symbol. Returns 0 if not found. */
  12 unsigned long kallsyms_lookup_name(const char *name);
  13
  14 /* Lookup an address.  modname is set to NULL if it's in the kernel. */
  15 const char *kallsyms_lookup(unsigned long addr,
  16                             unsigned long *symbolsize,
  17                             unsigned long *offset,
  18                             char **modname, char *namebuf);
  19
  20 /* Replace "%s" in format with address, if found */
  21 extern void __print_symbol(const char *fmt, unsigned long address);
  22
  23 #else /* !CONFIG_KALLSYMS */
  24
  25 static inline unsigned long kallsyms_lookup_name(const char *name)
  26 {
  27         return 0;
  28 }
  29
  30 static inline const char *kallsyms_lookup(unsigned long addr,
  31                                           unsigned long *symbolsize,
  32                                           unsigned long *offset,
  33                                           char **modname, char *namebuf)
  34 {
  35         return NULL;
  36 }
  37
  38 /* Stupid that this does nothing, but I didn't create this mess. */
  39 #define __print_symbol(fmt, addr)
  40 #endif /*CONFIG_KALLSYMS*/
  41
  42 /* This macro allows us to keep printk typechecking */
  43 static void __check_printsym_format(const char *fmt, ...)
  44 __attribute__((format(printf,1,2)));
  45 static inline void __check_printsym_format(const char *fmt, ...)
  46 {
  47 }
  48
  49 #define print_symbol(fmt, addr)                 \
  50 do {                                            \
  51         __check_printsym_format(fmt, "");       \
  52         __print_symbol(fmt, addr);              \
  53 } while(0)
  54
  55 #endif /*_LINUX_KALLSYMS_H*/