gas/output-file.c

/* output-file.c -  Deal with the output file
   Copyright (C) 1987-2023 Free Software Foundation, Inc.

   This file is part of GAS, the GNU Assembler.

   GAS 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, or (at your option)
   any later version.

   GAS 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 GAS; see the file COPYING.  If not, write to
   the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */

#include "as.h"
#include "subsegs.h"
#include "sb.h"
#include "macro.h"
#include "output-file.h"

#ifndef TARGET_MACH
#define TARGET_MACH 0
#endif

bfd *stdoutput;

void
output_file_create (const char *name)
{
  if (name[0] == '-' && name[1] == '\0')
    as_fatal (_("can't open a bfd on stdout %s"), name);

  else if (!(stdoutput = bfd_openw (name, TARGET_FORMAT)))
    {
      bfd_error_type err = bfd_get_error ();

      if (err == bfd_error_invalid_target)
	as_fatal (_("selected target format '%s' unknown"), TARGET_FORMAT);
      else
	as_fatal (_("can't create %s: %s"), name, bfd_errmsg (err));
    }

  bfd_set_format (stdoutput, bfd_object);
  bfd_set_arch_mach (stdoutput, TARGET_ARCH, TARGET_MACH);
  if (flag_traditional_format)
    stdoutput->flags |= BFD_TRADITIONAL_FORMAT;
}

static void
stash_frchain_obs (asection *sec)
{
  segment_info_type *info = seg_info (sec);
  if (info)
    {
      struct frchain *frchp;
      for (frchp = info->frchainP; frchp; frchp = frchp->frch_next)
	obstack_ptr_grow (&notes, &frchp->frch_obstack);
      info->frchainP = NULL;
    }
}

void
output_file_close (void)
{
  bool res;
  bfd *obfd = stdoutput;
  struct obstack **obs;
  asection *sec;
  const char *filename;

  if (obfd == NULL)
    return;

  /* Prevent an infinite loop - if the close failed we will call as_fatal
     which will call xexit() which may call this function again...  */
  stdoutput = NULL;

  /* We can't free obstacks attached to the output bfd sections before
     closing the output bfd since data in those obstacks may need to
     be accessed, but we can't access anything in the output bfd after
     it is closed..  */
  for (sec = obfd->sections; sec; sec = sec->next)
    stash_frchain_obs (sec);
  stash_frchain_obs (reg_section);
  stash_frchain_obs (expr_section);
  stash_frchain_obs (bfd_abs_section_ptr);
  stash_frchain_obs (bfd_und_section_ptr);
  obstack_ptr_grow (&notes, NULL);
  obs = obstack_finish (&notes);

  /* Close the bfd.  */
  if (!flag_always_generate_output && had_errors ())
    res = bfd_close_all_done (obfd);
  else
    res = bfd_close (obfd);
  now_seg = NULL;
  now_subseg = 0;

  filename = out_file_name;
  out_file_name = NULL;
  if (!keep_it && filename)
    unlink_if_ordinary (filename);

#ifdef md_end
  md_end ();
#endif
#ifdef obj_end
  obj_end ();
#endif
  macro_end ();
  expr_end ();
  read_end ();
  symbol_end ();
  subsegs_end (obs);

  if (!res)
    as_fatal ("%s: %s", filename, bfd_errmsg (bfd_get_error ()));
}