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  • Sergey Senozhatsky's avatar
    parisc64: Add .opd based function descriptor dereference · 1705bd6a
    Sergey Senozhatsky authored
    We are moving towards separate kernel and module function descriptor
    dereference callbacks. This patch enables it for parisc64.
    
    For pointers that belong to the kernel
    -  Added __start_opd and __end_opd pointers, to track the kernel
       .opd section address range;
    
    -  Added dereference_kernel_function_descriptor(). Now we
       will dereference only function pointers that are within
       [__start_opd, __end_opd);
    
    For pointers that belong to a module
    -  Added dereference_module_function_descriptor() to handle module
       function descriptor dereference. Now we will dereference only
       pointers that are within [module->opd.start, module->opd.end).
    
    Link: http://lkml.kernel.org/r/20171109234830.5067-5-sergey.senozhatsky@gmail.com
    
    
    To: Tony Luck <tony.luck@intel.com>
    To: Fenghua Yu <fenghua.yu@intel.com>
    To: Helge Deller <deller@gmx.de>
    To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    To: Paul Mackerras <paulus@samba.org>
    To: Michael Ellerman <mpe@ellerman.id.au>
    To: James Bottomley <jejb@parisc-linux.org>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Jessica Yu <jeyu@kernel.org>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: linux-ia64@vger.kernel.org
    Cc: linux-parisc@vger.kernel.org
    Cc: linuxppc-dev@lists.ozlabs.org
    Cc: linux-kernel@vger.kernel.org
    Signed-off-by: default avatarSergey Senozhatsky <sergey.senozhatsky@gmail.com>
    Tested-by: Helge Deller <deller@gmx.de> #parisc64
    Signed-off-by: default avatarPetr Mladek <pmladek@suse.com>
    1705bd6a