Subversion Repositories openrisc_2011-10-31

/* Generic relocation support for BFD.

   Copyright 1998, 1999, 2000, 2003 Free Software Foundation, Inc.

   This file is part of BFD, the Binary File Descriptor library.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software Foundation,

   Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */

/* These macros are used by the various *.h target specific header

   files to either generate an enum containing all the known relocations

   for that target, or if RELOC_MACROS_GEN_FUNC is defined, a recognition

   function is generated instead.  (This is used by binutils/readelf.c)

   Given a header file like this:

        START_RELOC_NUMBERS (foo)

            RELOC_NUMBER (R_foo_NONE,    0)

            RELOC_NUMBER (R_foo_32,      1)

            EMPTY_RELOC  (R_foo_good)

            FAKE_RELOC   (R_foo_illegal, 9)

        END_RELOC_NUMBERS (R_foo_count)

   Then the following will be produced by default (ie if

   RELOC_MACROS_GEN_FUNC is *not* defined).

        enum foo

        {

          R_foo_NONE = 0,

          R_foo_32 = 1,

          R_foo_good,

          R_foo_illegal = 9,

          R_foo_count

        };

   Note: The value of the symbol defined in the END_RELOC_NUMBERS

   macro (R_foo_count in the case of the example above) will be

   set to the value of the whichever *_RELOC macro preceeds it plus

   one.  Therefore if you intend to use the symbol as a sentinel for

   the highest valid macro value you should make sure that the

   preceeding *_RELOC macro is the highest valid number.  ie a

   declaration like this:

        START_RELOC_NUMBERS (foo)

            RELOC_NUMBER (R_foo_NONE,    0)

            RELOC_NUMBER (R_foo_32,      1)

            FAKE_RELOC   (R_foo_illegal, 9)

            FAKE_RELOC   (R_foo_synonym, 0)

        END_RELOC_NUMBERS (R_foo_count)

   will result in R_foo_count having a value of 1 (R_foo_synonym + 1)

   rather than 10 or 2 as might be expected.

   Alternatively you can assign a value to END_RELOC_NUMBERS symbol

   explicitly, like this:

        START_RELOC_NUMBERS (foo)

            RELOC_NUMBER (R_foo_NONE,    0)

            RELOC_NUMBER (R_foo_32,      1)

            FAKE_RELOC   (R_foo_illegal, 9)

            FAKE_RELOC   (R_foo_synonym, 0)

        END_RELOC_NUMBERS (R_foo_count = 2)

   If RELOC_MACROS_GEN_FUNC *is* defined, then instead the

   following function will be generated:

        static const char *foo (unsigned long rtype);

        static const char *

        foo (unsigned long rtype)

        {

           switch (rtype)

           {

           case 0: return "R_foo_NONE";

           case 1: return "R_foo_32";

           default: return NULL;

           }

        }

   */

#ifndef _RELOC_MACROS_H

#define _RELOC_MACROS_H

#ifdef RELOC_MACROS_GEN_FUNC

/* This function takes the relocation number and returns the

   string version name of the name of that relocation.  If

   the relocation is not recognised, NULL is returned.  */

#define START_RELOC_NUMBERS(name)                               \

static const char *name (unsigned long rtype);                  \

static const char *                                             \

name (unsigned long rtype)                                      \

{                                                               \

  switch (rtype)                                                \

    {

#define RELOC_NUMBER(name, number) \

    case number: return #name;

#define FAKE_RELOC(name, number)

#define EMPTY_RELOC(name)

#define END_RELOC_NUMBERS(name) \

    default: return NULL;       \

    }                           \

}

#else /* Default to generating enum.  */

#define START_RELOC_NUMBERS(name)   enum name {

#define RELOC_NUMBER(name, number)  name = number,

#define FAKE_RELOC(name, number)    name = number,

#define EMPTY_RELOC(name)           name,

#define END_RELOC_NUMBERS(name)     name };

#endif

#endif /* _RELOC_MACROS_H */