# This shell script emits a C file. -*- C -*-
#   Copyright (C) 2011-2025 Free Software Foundation, Inc.
#
# This file is part of the GNU Binutils.
#
# 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.
#

# This file is sourced from elf.em, and defines extra C6X DSBT specific
# features.
#
fragment <<EOF
#include "ldctor.h"
#include "elf32-tic6x.h"

static struct elf32_tic6x_params params =
{
 0, 64
};

static int merge_exidx_entries = -1;

static int
is_tic6x_target (void)
{
 extern const bfd_target tic6x_elf32_le_vec;
 extern const bfd_target tic6x_elf32_be_vec;
 extern const bfd_target tic6x_elf32_linux_le_vec;
 extern const bfd_target tic6x_elf32_linux_be_vec;
 extern const bfd_target tic6x_elf32_c6000_le_vec;
 extern const bfd_target tic6x_elf32_c6000_be_vec;

 return (link_info.output_bfd->xvec == &tic6x_elf32_le_vec
         || link_info.output_bfd->xvec == &tic6x_elf32_be_vec
         || link_info.output_bfd->xvec == &tic6x_elf32_linux_le_vec
         || link_info.output_bfd->xvec == &tic6x_elf32_linux_be_vec
         || link_info.output_bfd->xvec == &tic6x_elf32_c6000_le_vec
         || link_info.output_bfd->xvec == &tic6x_elf32_c6000_be_vec);
}

/* Pass params to backend.  */

static void
tic6x_after_open (void)
{
 if (is_tic6x_target ())
   {
     if (params.dsbt_index >= params.dsbt_size)
       fatal (_("%P: invalid --dsbt-index %d, outside DSBT size\n"),
              params.dsbt_index);
     elf32_tic6x_setup (&link_info, &params);
   }

 gld${EMULATION_NAME}_after_open ();
}

static int
compare_output_sec_vma (const void *a, const void *b)
{
 asection *asec = *(asection **) a, *bsec = *(asection **) b;
 asection *aout = asec->output_section, *bout = bsec->output_section;
 bfd_vma avma, bvma;

 /* If there's no output section for some reason, compare equal.  */
 if (!aout || !bout)
   return 0;

 avma = aout->vma + asec->output_offset;
 bvma = bout->vma + bsec->output_offset;

 if (avma > bvma)
   return 1;
 else if (avma < bvma)
   return -1;

 return 0;
}

static void
gld${EMULATION_NAME}_after_allocation (void)
{
 int layout_changed = 0;
 int ret;

 if (!bfd_link_relocatable (&link_info))
   {
     /* Build a sorted list of input text sections, then use that to process
        the unwind table index.  */
     unsigned int list_size = 10;
     asection **sec_list = (asection **)
       xmalloc (list_size * sizeof (asection *));
     unsigned int sec_count = 0;

     LANG_FOR_EACH_INPUT_STATEMENT (is)
       {
         bfd *abfd = is->the_bfd;
         asection *sec;

         if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
           continue;

         for (sec = abfd->sections; sec != NULL; sec = sec->next)
           {
             asection *out_sec = sec->output_section;

             if (out_sec
                 && elf_section_data (sec)
                 && elf_section_type (sec) == SHT_PROGBITS
                 && (elf_section_flags (sec) & SHF_EXECINSTR) != 0
                 && (sec->flags & SEC_EXCLUDE) == 0
                 && sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
                 && out_sec != bfd_abs_section_ptr)
               {
                 if (sec_count == list_size)
                   {
                     list_size *= 2;
                     sec_list = (asection **)
                       xrealloc (sec_list, list_size * sizeof (asection *));
                   }

                 sec_list[sec_count++] = sec;
               }
           }
       }

     qsort (sec_list, sec_count, sizeof (asection *), &compare_output_sec_vma);

     if (elf32_tic6x_fix_exidx_coverage (sec_list, sec_count, &link_info,
                                          merge_exidx_entries))
       layout_changed = 1;

     free (sec_list);
   }

 /* bfd_elf32_discard_info just plays with debugging sections,
    ie. doesn't affect any code, so we can delay resizing the
    sections.  */
 ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
 if (ret < 0)
   {
     einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
     return;
   }
 else if (ret > 0)
   layout_changed = 1;

 ldelf_map_segments (layout_changed);
}
EOF

# This code gets inserted into the generic elf32.sc linker script
# and allows us to define our own command line switches.
PARSE_AND_LIST_LONGOPTS='
 {"dsbt-index", required_argument, NULL, OPTION_DSBT_INDEX},
 {"dsbt-size", required_argument, NULL, OPTION_DSBT_SIZE},
 { "no-merge-exidx-entries", no_argument, NULL, OPTION_NO_MERGE_EXIDX_ENTRIES },
'

PARSE_AND_LIST_OPTIONS='
 fprintf (file, _("  --dsbt-index <index>    Use this as the DSBT index for the output object\n"));
 fprintf (file, _("  --dsbt-size <index>     Use this as the number of entries in the DSBT table\n"));
 fprintf (file, _("  --no-merge-exidx-entries\n"));
 fprintf (file, _("                          Disable merging exidx entries\n"));
'

PARSE_AND_LIST_ARGS_CASES='
   case OPTION_DSBT_INDEX:
     {
       char *end;
       params.dsbt_index = strtol (optarg, &end, 0);
       if (*end == 0
           && params.dsbt_index >= 0 && params.dsbt_index < 0x7fff)
         break;
       fatal (_("%P: invalid --dsbt-index %s\n"), optarg);
     }
     break;
   case OPTION_DSBT_SIZE:
     {
       char *end;
       params.dsbt_size = strtol (optarg, &end, 0);
       if (*end == 0
           && params.dsbt_size >= 0 && params.dsbt_size < 0x7fff)
         break;
       fatal (_("%P: invalid --dsbt-size %s\n"), optarg);
     }
     break;
  case OPTION_NO_MERGE_EXIDX_ENTRIES:
     merge_exidx_entries = 0;
'

LDEMUL_AFTER_OPEN=tic6x_after_open
LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation

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