1  /* output-file.c -  Deal with the output file
       2     Copyright (C) 1987-2023 Free Software Foundation, Inc.
       3  
       4     This file is part of GAS, the GNU Assembler.
       5  
       6     GAS is free software; you can redistribute it and/or modify
       7     it under the terms of the GNU General Public License as published by
       8     the Free Software Foundation; either version 3, or (at your option)
       9     any later version.
      10  
      11     GAS is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14     GNU General Public License for more details.
      15  
      16     You should have received a copy of the GNU General Public License
      17     along with GAS; see the file COPYING.  If not, write to
      18     the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
      19     02110-1301, USA.  */
      20  
      21  #include "as.h"
      22  #include "subsegs.h"
      23  #include "sb.h"
      24  #include "macro.h"
      25  #include "output-file.h"
      26  
      27  #ifndef TARGET_MACH
      28  #define TARGET_MACH 0
      29  #endif
      30  
      31  bfd *stdoutput;
      32  
      33  void
      34  output_file_create (const char *name)
      35  {
      36    if (name[0] == '-' && name[1] == '\0')
      37      as_fatal (_("can't open a bfd on stdout %s"), name);
      38  
      39    else if (!(stdoutput = bfd_openw (name, TARGET_FORMAT)))
      40      {
      41        bfd_error_type err = bfd_get_error ();
      42  
      43        if (err == bfd_error_invalid_target)
      44  	as_fatal (_("selected target format '%s' unknown"), TARGET_FORMAT);
      45        else
      46  	as_fatal (_("can't create %s: %s"), name, bfd_errmsg (err));
      47      }
      48  
      49    bfd_set_format (stdoutput, bfd_object);
      50    bfd_set_arch_mach (stdoutput, TARGET_ARCH, TARGET_MACH);
      51    if (flag_traditional_format)
      52      stdoutput->flags |= BFD_TRADITIONAL_FORMAT;
      53  }
      54  
      55  static void
      56  stash_frchain_obs (asection *sec)
      57  {
      58    segment_info_type *info = seg_info (sec);
      59    if (info)
      60      {
      61        struct frchain *frchp;
      62        for (frchp = info->frchainP; frchp; frchp = frchp->frch_next)
      63  	obstack_ptr_grow (&notes, &frchp->frch_obstack);
      64        info->frchainP = NULL;
      65      }
      66  }
      67  
      68  void
      69  output_file_close (void)
      70  {
      71    bool res;
      72    bfd *obfd = stdoutput;
      73    struct obstack **obs;
      74    asection *sec;
      75    const char *filename;
      76  
      77    if (obfd == NULL)
      78      return;
      79  
      80    /* Prevent an infinite loop - if the close failed we will call as_fatal
      81       which will call xexit() which may call this function again...  */
      82    stdoutput = NULL;
      83  
      84    /* We can't free obstacks attached to the output bfd sections before
      85       closing the output bfd since data in those obstacks may need to
      86       be accessed, but we can't access anything in the output bfd after
      87       it is closed..  */
      88    for (sec = obfd->sections; sec; sec = sec->next)
      89      stash_frchain_obs (sec);
      90    stash_frchain_obs (reg_section);
      91    stash_frchain_obs (expr_section);
      92    stash_frchain_obs (bfd_abs_section_ptr);
      93    stash_frchain_obs (bfd_und_section_ptr);
      94    obstack_ptr_grow (&notes, NULL);
      95    obs = obstack_finish (&notes);
      96  
      97    /* Close the bfd.  */
      98    if (!flag_always_generate_output && had_errors ())
      99      res = bfd_close_all_done (obfd);
     100    else
     101      res = bfd_close (obfd);
     102    now_seg = NULL;
     103    now_subseg = 0;
     104  
     105    filename = out_file_name;
     106    out_file_name = NULL;
     107    if (!keep_it && filename)
     108      unlink_if_ordinary (filename);
     109  
     110  #ifdef md_end
     111    md_end ();
     112  #endif
     113  #ifdef obj_end
     114    obj_end ();
     115  #endif
     116    macro_end ();
     117    expr_end ();
     118    read_end ();
     119    symbol_end ();
     120    subsegs_end (obs);
     121  
     122    if (!res)
     123      as_fatal ("%s: %s", filename, bfd_errmsg (bfd_get_error ()));
     124  }