/* BFD COFF interfaces used outside of BFD.

   Copyright (C) 1990-2026 Free Software Foundation, Inc.

   Written by Cygnus Support.

   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 3 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.  */

#include "sysdep.h"

#include "bfd.h"

#include "libbfd.h"

#include "coff/internal.h"

#include "libcoff.h"

/* Return the COFF syment for a symbol.  */

bool

bfd_coff_get_syment (bfd *abfd,

         asymbol *symbol,

         struct internal_syment *psyment)

{

  coff_symbol_type *csym;

  csym = coff_symbol_from (symbol);

  if (csym == NULL || csym->native == NULL

      || ! csym->native->is_sym)

    {

      bfd_set_error (bfd_error_invalid_operation);

      return false;

    }

  *psyment = csym->native->u.syment;

  if (csym->native->fix_value)

    {

      psyment->n_value =

  ((psyment->n_value - (uintptr_t) obj_raw_syments (abfd))

   / sizeof (combined_entry_type));

      csym->native->fix_value = 0;

    }

  /* FIXME: We should handle fix_line here.  */

  return true;

}

/* Return the COFF auxent for a symbol.  */

bool

bfd_coff_get_auxent (bfd *abfd,

         asymbol *symbol,

         int indx,

         union internal_auxent *pauxent)

{

  coff_symbol_type *csym;

  combined_entry_type *ent;

  csym = coff_symbol_from (symbol);

  if (csym == NULL

      || csym->native == NULL

      || ! csym->native->is_sym

      || indx >= csym->native->u.syment.n_numaux)

    {

      bfd_set_error (bfd_error_invalid_operation);

      return false;

    }

  ent = csym->native + indx + 1;

  BFD_ASSERT (! ent->is_sym);

  *pauxent = ent->u.auxent;

  if (ent->fix_tag)

    {

      pauxent->x_sym.x_tagndx.u32 =

  ((combined_entry_type *) pauxent->x_sym.x_tagndx.p

   - obj_raw_syments (abfd));

      ent->fix_tag = 0;

    }

  if (ent->fix_end)

    {

      pauxent->x_sym.x_fcnary.x_fcn.x_endndx.u32 =

  ((combined_entry_type *) pauxent->x_sym.x_fcnary.x_fcn.x_endndx.p

   - obj_raw_syments (abfd));

      ent->fix_end = 0;

    }

  if (ent->fix_scnlen)

    {

      pauxent->x_csect.x_scnlen.u64 =

  ((combined_entry_type *) pauxent->x_csect.x_scnlen.p

   - obj_raw_syments (abfd));

      ent->fix_scnlen = 0;

    }

  return true;

}

/* Return TRUE if SYMBOL is a PE weak external whose fallback symbol is

   a real definition.  A weak declaration with no fallback uses the COFF

   null symbol as its fallback; do not treat that as an archive provider.  */

bool

bfd_coff_pe_weak_external_has_real_fallback (bfd *abfd,

              asymbol *symbol)

{

  coff_symbol_type *csym;

  combined_entry_type *aux;

  combined_entry_type *fallback;

  if (bfd_get_flavour (abfd) != bfd_target_coff_flavour

      || coff_data (abfd) == NULL

      || ! obj_pe (abfd))

    return false;

  csym = coff_symbol_from (symbol);

  if (csym == NULL

      || csym->native == NULL

      || ! csym->native->is_sym

      || csym->native->u.syment.n_sclass != C_NT_WEAK

      || csym->native->u.syment.n_numaux != 1)

    return false;

  aux = csym->native + 1;

  if (aux->is_sym)

    return false;

  if (aux->fix_tag)

    fallback = (combined_entry_type *) aux->u.auxent.x_sym.x_tagndx.p;

  else

    {

      uint32_t tagndx = aux->u.auxent.x_sym.x_tagndx.u32;

      if (tagndx >= obj_raw_syment_count (abfd))

  return false;

      fallback = obj_raw_syments (abfd) + tagndx;

    }

  return (fallback != NULL

    && fallback->is_sym

    && fallback->u.syment.n_scnum != N_UNDEF

    && !(fallback->u.syment.n_scnum == N_ABS

         && fallback->u.syment.n_value == 0));

}