gas/output-file.c

   1 /* output-file.c -  Deal with the output file
   2    Copyright (C) 1987-2022 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 "output-file.h"
  24
  25 #ifndef TARGET_MACH
  26 #define TARGET_MACH 0
  27 #endif
  28
  29 bfd *stdoutput;
  30
  31 void
  32 output_file_create (const char *name)
  33 {
  34   if (name[0] == '-' && name[1] == '\0')
  35     as_fatal (_("can't open a bfd on stdout %s"), name);
  36
  37   else if (!(stdoutput = bfd_openw (name, TARGET_FORMAT)))
  38     {
  39       bfd_error_type err = bfd_get_error ();
  40
  41       if (err == bfd_error_invalid_target)
  42         as_fatal (_("selected target format '%s' unknown"), TARGET_FORMAT);
  43       else
  44         as_fatal (_("can't create %s: %s"), name, bfd_errmsg (err));
  45     }
  46
  47   bfd_set_format (stdoutput, bfd_object);
  48   bfd_set_arch_mach (stdoutput, TARGET_ARCH, TARGET_MACH);
  49   if (flag_traditional_format)
  50     stdoutput->flags |= BFD_TRADITIONAL_FORMAT;
  51 }
  52
  53 static void
  54 stash_frchain_obs (asection *sec)
  55 {
  56   segment_info_type *info = seg_info (sec);
  57   if (info)
  58     {
  59       struct frchain *frchp;
  60       for (frchp = info->frchainP; frchp; frchp = frchp->frch_next)
  61         obstack_ptr_grow (&notes, &frchp->frch_obstack);
  62       info->frchainP = NULL;
  63     }
  64 }
  65
  66 void
  67 output_file_close (const char *filename)
  68 {
  69   bool res;
  70   bfd *obfd = stdoutput;
  71   struct obstack **obs;
  72   asection *sec;
  73
  74   if (obfd == NULL)
  75     return;
  76
  77   /* Prevent an infinite loop - if the close failed we will call as_fatal
  78      which will call xexit() which may call this function again...  */
  79   stdoutput = NULL;
  80
  81   /* We can't free obstacks attached to the output bfd sections before
  82      closing the output bfd since data in those obstacks may need to
  83      be accessed, but we can't access anything in the output bfd after
  84      it is closed..  */
  85   for (sec = obfd->sections; sec; sec = sec->next)
  86     stash_frchain_obs (sec);
  87   stash_frchain_obs (reg_section);
  88   stash_frchain_obs (expr_section);
  89   stash_frchain_obs (bfd_abs_section_ptr);
  90   stash_frchain_obs (bfd_und_section_ptr);
  91   obstack_ptr_grow (&notes, NULL);
  92   obs = obstack_finish (&notes);
  93
  94   /* Close the bfd.  */
  95   if (!flag_always_generate_output && had_errors ())
  96     res = bfd_cache_close_all ();
  97   else
  98     res = bfd_close (obfd);
  99
 100   subsegs_end (obs);
 101
 102   if (! res)
 103     as_fatal ("%s: %s", filename, bfd_errmsg (bfd_get_error ()));
 104 }