Subversion Repositories openrisc

#ifndef CYGONCE_LOADER_PPC_ELF_H

#define CYGONCE_LOADER_PPC_ELF_H

//==========================================================================

//

//      ppc_elf.h

//

//      PowerPC specific ELF file format support

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos 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 or (at your option) any later version.

//

// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    nickg

// Contributors: nickg

// Date:         2000-11-20

// Purpose:      Define PowerPC ELF support

// Description:  This file contains definitions for configuring the dynamic

//               loader to deal with the PowerPC specific parts of the ELF

//               file format.

//              

// Usage:

//              #include <cyg/loader/ppc_elf.h>

//              ...

//              

//

//####DESCRIPTIONEND####

//

//==========================================================================

#include <pkgconf/system.h>

#include <pkgconf/hal.h>

#if defined(CYGPKG_HAL_POWERPC)

#ifndef CYG_LOADER_DYNAMIC_LD

#include <cyg/infra/cyg_type.h>

//--------------------------------------------------------------------------

// Basic definitions

#define CYG_ELF_MACHINE     EM_PPC

//--------------------------------------------------------------------------

// Relocation types

// Taken from binutils/include/elf/ppc.h - not currently sure which

// of these are actually used in executables.

#define R_PPC_NONE                      0

#define R_PPC_ADDR32                    1

#define R_PPC_ADDR24                    2

#define R_PPC_ADDR16                    3

#define R_PPC_ADDR16_LO                 4

#define R_PPC_ADDR16_HI                 5

#define R_PPC_ADDR16_HA                 6

#define R_PPC_ADDR14                    7

#define R_PPC_ADDR14_BRTAKEN            8

#define R_PPC_ADDR14_BRNTAKEN           9

#define R_PPC_REL24                     10

#define R_PPC_REL14                     11

#define R_PPC_REL14_BRTAKEN             12

#define R_PPC_REL14_BRNTAKEN            13

#define R_PPC_GOT16                     14

#define R_PPC_GOT16_LO                  15

#define R_PPC_GOT16_HI                  16

#define R_PPC_GOT16_HA                  17

#define R_PPC_PLTREL24                  18

#define R_PPC_COPY                      19

#define R_PPC_GLOB_DAT                  20

#define R_PPC_JMP_SLOT                  21

#define R_PPC_RELATIVE                  22

#define R_PPC_LOCAL24PC                 23

#define R_PPC_UADDR32                   24

#define R_PPC_UADDR16                   25

#define R_PPC_REL32                     26

#define R_PPC_PLT32                     27

#define R_PPC_PLTREL32                  28

#define R_PPC_PLT16_LO                  29

#define R_PPC_PLT16_HI                  30

#define R_PPC_PLT16_HA                  31

#define R_PPC_SDAREL16                  32

#define R_PPC_SECTOFF                   33

#define R_PPC_SECTOFF_LO                34

#define R_PPC_SECTOFF_HI                35

#define R_PPC_SECTOFF_HA                36

/* The remaining relocs are from the Embedded ELF ABI, and are not

   in the SVR4 ELF ABI.  */

#define R_PPC_EMB_NADDR32               101

#define R_PPC_EMB_NADDR16               102

#define R_PPC_EMB_NADDR16_LO            103

#define R_PPC_EMB_NADDR16_HI            104

#define R_PPC_EMB_NADDR16_HA            105

#define R_PPC_EMB_SDAI16                106

#define R_PPC_EMB_SDA2I16               107

#define R_PPC_EMB_SDA2REL               108

#define R_PPC_EMB_SDA21                 109

#define R_PPC_EMB_MRKREF                110

#define R_PPC_EMB_RELSEC16              111

#define R_PPC_EMB_RELST_LO              112

#define R_PPC_EMB_RELST_HI              113

#define R_PPC_EMB_RELST_HA              114

#define R_PPC_EMB_BIT_FLD               115

#define R_PPC_EMB_RELSDA                116

  /* These are GNU extensions to enable C++ vtable garbage collection.  */

#define R_PPC_GNU_VTINHERIT             253

#define R_PPC_GNU_VTENTRY               254

/* This is a phony reloc to handle any old fashioned TOC16 references

   that may still be in object files.  */

#define R_PPC_TOC16                     255

//--------------------------------------------------------------------------

// Processor specific customization class for Cyg_LoadObject class.

#ifdef __cplusplus

class Cyg_LoadObject_Proc :

      public Cyg_LoadObject_Base

{

 public:

    inline Cyg_LoadObject_Proc()

        : Cyg_LoadObject_Base()

        {

        };

    inline Cyg_LoadObject_Proc( Cyg_LoaderStream& stream,

                    cyg_uint32 mode,

                    Cyg_LoaderMemAlloc *mem )

        : Cyg_LoadObject_Base( stream, mode, mem )

        {

        };

    inline ~Cyg_LoadObject_Proc() {};

    cyg_code apply_rel( unsigned char type, Elf32_Word sym, Elf32_Addr offset );

    cyg_code apply_rela( unsigned char type, Elf32_Word sym,

                         Elf32_Addr offset, Elf32_Sword addend );

};

//--------------------------------------------------------------------------

inline cyg_code Cyg_LoadObject_Proc::apply_rel( unsigned char type,

                                                Elf32_Word sym,

                                                Elf32_Addr offset )

{

    return 0;

}

inline cyg_code Cyg_LoadObject_Proc::apply_rela( unsigned char type,

                                                 Elf32_Word sym,

                                                 Elf32_Addr offset,

                                                 Elf32_Sword addend )

{

    return 0; // CYG_LOADERR_INVALID_RELOC;

}

//--------------------------------------------------------------------------

externC void abort() CYGBLD_ATTRIB_WEAK;

externC void abort() { for(;;); }

externC int strcmp(const char *a, const char *b) CYGBLD_ATTRIB_WEAK;

externC int strcmp(const char *a, const char *b) { return a==b; }

externC unsigned int strlen(const char *a) CYGBLD_ATTRIB_WEAK;

externC unsigned int strlen(const char *a) { return 1; }

//--------------------------------------------------------------------------

#endif // __cplusplus

#else // CYG_LOADER_DYNAMIC_LD

//--------------------------------------------------------------------------

#define CYG_LOADER_DYNAMIC_PREFIX                                               \

        OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc", "elf32-powerpc")     \

        OUTPUT_ARCH("powerpc")

/* Adjust the address for the data segment.  We want to adjust up to

   the same address within the page on the next page up.  */

#define CYG_LOADER_DYNAMIC_DATA_ALIGN                   \

        . = ALIGN(0x1000) + (. & (0x1000 - 1));

//--------------------------------------------------------------------------

#endif // CYG_LOADER_DYNAMIC_LD

#endif // defined(CYGPKG_HAL_POWERPC) && __cplusplus

//--------------------------------------------------------------------------

#endif // ifndef CYGONCE_LOADER_PPC_ELF_H

// End of ppc_elf.h