gas/output-file.c

   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 }