drivers/staging/lttng/wrapper/kallsyms.h

   1 #ifndef _LTT_WRAPPER_KALLSYMS_H
   2 #define _LTT_WRAPPER_KALLSYMS_H
   3
   4 #include <linux/kallsyms.h>
   5
   6 /*
   7  * Copyright (C) 2011 Avik Sil (avik.sil@linaro.org)
   8  *
   9  * wrapper around kallsyms_lookup_name. Implements arch-dependent code for
  10  * arches where the address of the start of the function body is different
  11  * from the pointer which can be used to call the function, e.g. ARM THUMB2.
  12  *
  13  * Dual LGPL v2.1/GPL v2 license.
  14  */
  15
  16 static inline
  17 unsigned long kallsyms_lookup_funcptr(const char *name)
  18 {
  19         unsigned long addr;
  20
  21         addr = kallsyms_lookup_name(name);
  22 #ifdef CONFIG_ARM
  23 #ifdef CONFIG_THUMB2_KERNEL
  24         if (addr)
  25                 addr |= 1; /* set bit 0 in address for thumb mode */
  26 #endif
  27 #endif
  28         return addr;
  29 }
  30 #endif /* _LTT_WRAPPER_KALLSYMS_H */