source: branches/libc-0.6/src/binutils/include/elf/reloc-macros.h

/* Generic relocation support for BFD.
   Copyright 1998, 1999, 2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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
        };

   If RELOC_MACROS_GEN_FUNC *is* defined, then instead the
   following function will be generated:

        static const char * foo PARAMS ((unsigned long rtype));
        static const char *
        foo (rtype)
            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    PARAMS ((unsigned long rtype));     \
static const char *                                             \
name (rtype)                                                    \
        unsigned long rtype;                                    \
{                                                               \
  switch (rtype)                                                \
  {

#if defined (__STDC__) || defined (ALMOST_STDC)
#define RELOC_NUMBER(name, number)  case number : return #name ;
#else
#define RELOC_NUMBER(name, number)  case number : return "name" ;
#endif

#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 */