are usually located at BOF, this is not always true and only the libunwind
info can decipher where they actually are. */
int
-libunwind_get_reg_special (struct gdbarch *gdbarch, struct regcache *regcache,
+libunwind_get_reg_special (struct gdbarch *gdbarch, readable_regcache *regcache,
int regnum, void *buf)
{
unw_cursor_t cursor;