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/* BFD back-end for Zilog Z800n COFF binaries.

   Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001

   Free Software Foundation, Inc.

   Contributed by Cygnus Support.

   Written by Steve Chamberlain, <sac@cygnus.com>.

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.  */

#include "bfd.h"

#include "sysdep.h"

#include "libbfd.h"

#include "bfdlink.h"

#include "coff/z8k.h"

#include "coff/internal.h"

#include "libcoff.h"

static void extra_case PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *, bfd_byte *, unsigned int *, unsigned int *));

static void reloc_processing PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *));

static void rtype2howto PARAMS ((arelent *, struct internal_reloc *));

static int coff_z8k_select_reloc PARAMS ((reloc_howto_type *));

#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)

static reloc_howto_type r_imm32 =

HOWTO (R_IMM32, 0, 2, 32, false, 0,

       complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff,

       0xffffffff, false);

static reloc_howto_type r_imm4l =

HOWTO (R_IMM4L, 0, 0, 4, false, 0,

       complain_overflow_bitfield, 0, "r_imm4l", true, 0xf, 0xf, false);

static reloc_howto_type r_da =

HOWTO (R_IMM16, 0, 1, 16, false, 0,

       complain_overflow_bitfield, 0, "r_da", true, 0x0000ffff, 0x0000ffff,

       false);

static reloc_howto_type r_imm8 =

HOWTO (R_IMM8, 0, 0, 8, false, 0,

       complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff,

       false);

static reloc_howto_type r_rel16 =

HOWTO (R_REL16, 0, 1, 16, false, 0,

       complain_overflow_bitfield, 0, "r_rel16", true, 0x0000ffff, 0x0000ffff,

       true);

static reloc_howto_type r_jr =

HOWTO (R_JR, 0, 0, 8, true, 0, complain_overflow_signed, 0,

       "r_jr", true, 0, 0, true);

static reloc_howto_type r_disp7 =

HOWTO (R_DISP7, 0, 0, 7, true, 0, complain_overflow_bitfield, 0,

       "r_disp7", true, 0, 0, true);

static reloc_howto_type r_callr =

HOWTO (R_CALLR, 0, 1, 12, true, 0, complain_overflow_signed, 0,

       "r_callr", true, 0xfff, 0xfff, true);

/* Turn a howto into a reloc number */

static int

coff_z8k_select_reloc (howto)

     reloc_howto_type *howto;

{

  return howto->type;

}

#define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto)

#define BADMAG(x) Z8KBADMAG(x)

#define Z8K 1                   /* Customize coffcode.h */

#define __A_MAGIC_SET__

/* Code to swap in the reloc.  */

#define SWAP_IN_RELOC_OFFSET    H_GET_32

#define SWAP_OUT_RELOC_OFFSET   H_PUT_32

#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \

  dst->r_stuff[0] = 'S'; \

  dst->r_stuff[1] = 'C';

/* Code to turn a r_type into a howto ptr, uses the above howto table.  */

static void

rtype2howto (internal, dst)

     arelent * internal;

     struct internal_reloc *dst;

{

  switch (dst->r_type)

    {

    default:

      abort ();

      break;

    case R_IMM8:

      internal->howto = &r_imm8;

      break;

     case R_IMM16:

      internal->howto = &r_da;

      break;

    case R_JR:

      internal->howto = &r_jr;

      break;

    case R_DISP7:

      internal->howto = &r_disp7;

      break;

    case R_CALLR:

      internal->howto = &r_callr;

      break;

    case R_REL16:

      internal->howto = &r_rel16;

      break;

    case R_IMM32:

      internal->howto = &r_imm32;

      break;

    case R_IMM4L:

      internal->howto = &r_imm4l;

      break;

    }

}

#define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)

/* Perform any necessary magic to the addend in a reloc entry.  */

#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \

 cache_ptr->addend =  ext_reloc.r_offset;

#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \

 reloc_processing(relent, reloc, symbols, abfd, section)

static void

reloc_processing (relent, reloc, symbols, abfd, section)

     arelent * relent;

     struct internal_reloc * reloc;

     asymbol ** symbols;

     bfd * abfd;

     asection * section;

{

  relent->address = reloc->r_vaddr;

  rtype2howto (relent, reloc);

  if (reloc->r_symndx > 0)

    relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];

  else

    relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;

  relent->addend = reloc->r_offset;

  relent->address -= section->vma;

}

static void

extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)

     bfd * in_abfd;

     struct bfd_link_info * link_info;

     struct bfd_link_order * link_order;

     arelent * reloc;

     bfd_byte * data;

     unsigned int * src_ptr;

     unsigned int * dst_ptr;

{

  asection * input_section = link_order->u.indirect.section;

  switch (reloc->howto->type)

    {

    case R_IMM8:

      bfd_put_8 (in_abfd,

                 bfd_coff_reloc16_get_value (reloc, link_info, input_section),

                 data + *dst_ptr);

      (*dst_ptr) += 1;

      (*src_ptr) += 1;

      break;

    case R_IMM32:

      /* If no flags are set, assume immediate value.  */

      if (! (*reloc->sym_ptr_ptr)->section->flags)

        {

          bfd_put_32 (in_abfd,

                      bfd_coff_reloc16_get_value (reloc, link_info,

                                                  input_section),

                      data + *dst_ptr);

        }

      else

        {

          bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,

                                                    input_section);

          /* Adresses are 23 bit, and the layout of those in a 32-bit

             value is as follows:

               1AAAAAAA xxxxxxxx AAAAAAAA AAAAAAAA

             (A - address bits,  x - ignore).  */

          dst = (dst & 0xffff) | ((dst & 0xff0000) << 8) | 0x80000000;

          bfd_put_32 (in_abfd, dst, data + *dst_ptr);

        }

      (*dst_ptr) += 4;

      (*src_ptr) += 4;

      break;

    case R_IMM4L:

      bfd_put_8 (in_abfd,

                 ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0)

                  | (0x0f

                     & bfd_coff_reloc16_get_value (reloc, link_info,

                                                   input_section))),

                 data + *dst_ptr);

      (*dst_ptr) += 1;

      (*src_ptr) += 1;

      break;

    case R_IMM16:

      bfd_put_16 (in_abfd,

                  bfd_coff_reloc16_get_value (reloc, link_info, input_section),

                  data + *dst_ptr);

      (*dst_ptr) += 2;

      (*src_ptr) += 2;

      break;

    case R_JR:

      {

        bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,

                                                  input_section);

        bfd_vma dot = (link_order->offset

                       + *dst_ptr

                       + input_section->output_section->vma);

        int gap = dst - dot - 1;  /* -1, since we're in the odd byte of the

                                     word and the pc's been incremented.  */

        if (gap & 1)

          abort ();

        gap /= 2;

        if (gap > 128 || gap < -128)

          {

            if (! ((*link_info->callbacks->reloc_overflow)

                   (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),

                    reloc->howto->name, reloc->addend, input_section->owner,

                    input_section, reloc->address)))

              abort ();

          }

        bfd_put_8 (in_abfd, gap, data + *dst_ptr);

        (*dst_ptr)++;

        (*src_ptr)++;

        break;

      }

    case R_DISP7:

      {

        bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,

                                                  input_section);

        bfd_vma dot = (link_order->offset

                       + *dst_ptr

                       + input_section->output_section->vma);

        int gap = dst - dot - 1;  /* -1, since we're in the odd byte of the

                                     word and the pc's been incremented.  */

        if (gap & 1)

          abort ();

        gap /= 2;

        if (gap > 0 || gap < -128)

          {

            if (! ((*link_info->callbacks->reloc_overflow)

                   (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),

                    reloc->howto->name, reloc->addend, input_section->owner,

                    input_section, reloc->address)))

              abort ();

          }

        bfd_put_8 (in_abfd,

                   (bfd_get_8 ( in_abfd, data + *dst_ptr) & 0x80) + (-gap & 0x7f),

                   data + *dst_ptr);

        (*dst_ptr)++;

        (*src_ptr)++;

        break;

      }

    case R_CALLR:

      {

        bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,

                                                  input_section);

        bfd_vma dot = (link_order->offset

                       + *dst_ptr

                       + input_section->output_section->vma);

        int gap = dst - dot - 2;

        if (gap & 1)

          abort ();

        gap /= 2;

        if (gap > 8191 || gap < -8192)

          {

            if (! ((*link_info->callbacks->reloc_overflow)

                   (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),

                    reloc->howto->name, reloc->addend, input_section->owner,

                    input_section, reloc->address)))

              abort ();

          }

        bfd_put_16 (in_abfd,

                    (bfd_get_16 ( in_abfd, data + *dst_ptr) & 0xf000) | (-gap & 0x0fff),

                    data + *dst_ptr);

        (*dst_ptr) += 2;

        (*src_ptr) += 2;

        break;

      }

    case R_REL16:

      {

        bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,

                                                  input_section);

        bfd_vma dot = (link_order->offset

                       + *dst_ptr

                       + input_section->output_section->vma);

        int gap = dst - dot - 2;

        if (gap > 32767 || gap < -32768)

          {

            if (! ((*link_info->callbacks->reloc_overflow)

                   (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),

                    reloc->howto->name, reloc->addend, input_section->owner,

                    input_section, reloc->address)))

              abort ();

          }

        bfd_put_16 (in_abfd, (bfd_vma) gap, data + *dst_ptr);

        (*dst_ptr) += 2;

        (*src_ptr) += 2;

        break;

      }

    default:

      abort ();

    }

}

#define coff_reloc16_extra_cases extra_case

#include "coffcode.h"

#undef  coff_bfd_get_relocated_section_contents

#undef coff_bfd_relax_section

#define coff_bfd_get_relocated_section_contents \

  bfd_coff_reloc16_get_relocated_section_contents

#define coff_bfd_relax_section bfd_coff_reloc16_relax_section

CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL)