Print non-Ada unions without crashing

[deliverable/binutils-gdb.git] / bfd / format.c

diff --git a/bfd/format.c b/bfd/format.c
index dd6dc8a32ce7d55a60d64adfea4fda243a490d8c..97a92291a8794f0b86646e7ddfbd02b61de6a939 100644 (file)
--- a/bfd/format.c
+++ b/bfd/format.c
@@ -1,5 +1,5 @@
 /* Generic BFD support for file formats.
 /* Generic BFD support for file formats.

-   Copyright (C) 1990-2015 Free Software Foundation, Inc.
+   Copyright (C) 1990-2019 Free Software Foundation, Inc.

    Written by Cygnus Support.
 
    This file is part of BFD, the Binary File Descriptor library.
    Written by Cygnus Support.
 
    This file is part of BFD, the Binary File Descriptor library.


@@ -103,7 +103,9 @@ struct bfd_preserve
   struct bfd_section *sections;
   struct bfd_section *section_last;
   unsigned int section_count;
   struct bfd_section *sections;
   struct bfd_section *section_last;
   unsigned int section_count;

+  unsigned int section_id;

   struct bfd_hash_table section_htab;
   struct bfd_hash_table section_htab;

+  const struct bfd_build_id *build_id;

 };
 
 /* When testing an object for compatibility with a particular target
 };
 
 /* When testing an object for compatibility with a particular target


@@ -124,8 +126,10 @@ bfd_preserve_save (bfd *abfd, struct bfd_preserve *preserve)
   preserve->sections = abfd->sections;
   preserve->section_last = abfd->section_last;
   preserve->section_count = abfd->section_count;
   preserve->sections = abfd->sections;
   preserve->section_last = abfd->section_last;
   preserve->section_count = abfd->section_count;

+  preserve->section_id = _bfd_section_id;

   preserve->section_htab = abfd->section_htab;
   preserve->marker = bfd_alloc (abfd, 1);
   preserve->section_htab = abfd->section_htab;
   preserve->marker = bfd_alloc (abfd, 1);

+  preserve->build_id = abfd->build_id;

   if (preserve->marker == NULL)
     return FALSE;
 
   if (preserve->marker == NULL)
     return FALSE;
 


@@ -136,12 +140,13 @@ bfd_preserve_save (bfd *abfd, struct bfd_preserve *preserve)
 /* Clear out a subset of BFD state.  */
 
 static void
 /* Clear out a subset of BFD state.  */
 
 static void

-bfd_reinit (bfd *abfd)
+bfd_reinit (bfd *abfd, unsigned int section_id)

 {
   abfd->tdata.any = NULL;
   abfd->arch_info = &bfd_default_arch_struct;
   abfd->flags &= BFD_FLAGS_SAVED;
   bfd_section_list_clear (abfd);
 {
   abfd->tdata.any = NULL;
   abfd->arch_info = &bfd_default_arch_struct;
   abfd->flags &= BFD_FLAGS_SAVED;
   bfd_section_list_clear (abfd);

+  _bfd_section_id = section_id;

 }
 
 /* Restores bfd state saved by bfd_preserve_save.  */
 }
 
 /* Restores bfd state saved by bfd_preserve_save.  */


@@ -158,6 +163,8 @@ bfd_preserve_restore (bfd *abfd, struct bfd_preserve *preserve)
   abfd->sections = preserve->sections;
   abfd->section_last = preserve->section_last;
   abfd->section_count = preserve->section_count;
   abfd->sections = preserve->sections;
   abfd->section_last = preserve->section_last;
   abfd->section_count = preserve->section_count;

+  _bfd_section_id = preserve->section_id;
+  abfd->build_id = preserve->build_id;

 
   /* bfd_release frees all memory more recently bfd_alloc'd than
      its arg, as well as its arg.  */
 
   /* bfd_release frees all memory more recently bfd_alloc'd than
      its arg, as well as its arg.  */


@@ -203,11 +210,15 @@ bfd_boolean
 bfd_check_format_matches (bfd *abfd, bfd_format format, char ***matching)
 {
   extern const bfd_target binary_vec;
 bfd_check_format_matches (bfd *abfd, bfd_format format, char ***matching)
 {
   extern const bfd_target binary_vec;

+#if BFD_SUPPORTS_PLUGINS
+  extern const bfd_target plugin_vec;
+#endif

   const bfd_target * const *target;
   const bfd_target **matching_vector = NULL;
   const bfd_target *save_targ, *right_targ, *ar_right_targ, *match_targ;
   int match_count, best_count, best_match;
   int ar_match_index;
   const bfd_target * const *target;
   const bfd_target **matching_vector = NULL;
   const bfd_target *save_targ, *right_targ, *ar_right_targ, *match_targ;
   int match_count, best_count, best_match;
   int ar_match_index;

+  unsigned int initial_section_id = _bfd_section_id;

   struct bfd_preserve preserve;
 
   if (matching != NULL)
   struct bfd_preserve preserve;
 
   if (matching != NULL)


@@ -281,14 +292,13 @@ bfd_check_format_matches (bfd *abfd, bfd_format format, char ***matching)
 
       /* Don't check the default target twice.  */
       if (*target == &binary_vec
 
       /* Don't check the default target twice.  */
       if (*target == &binary_vec

-         || (!abfd->target_defaulted && *target == save_targ)
-         || (*target)->match_priority > best_match)
+         || (!abfd->target_defaulted && *target == save_targ))

        continue;
 
       /* If we already tried a match, the bfd is modified and may
         have sections attached, which will confuse the next
         _bfd_check_format call.  */
        continue;
 
       /* If we already tried a match, the bfd is modified and may
         have sections attached, which will confuse the next
         _bfd_check_format call.  */

-      bfd_reinit (abfd);
+      bfd_reinit (abfd, initial_section_id);

 
       /* Change BFD's target temporarily.  */
       abfd->xvec = *target;
 
       /* Change BFD's target temporarily.  */
       abfd->xvec = *target;


@@ -305,6 +315,16 @@ bfd_check_format_matches (bfd *abfd, bfd_format format, char ***matching)
       temp = BFD_SEND_FMT (abfd, _bfd_check_format, (abfd));
       if (temp)
        {
       temp = BFD_SEND_FMT (abfd, _bfd_check_format, (abfd));
       if (temp)
        {

+         int match_priority = temp->match_priority;
+#if BFD_SUPPORTS_PLUGINS
+         /* If this object can be handled by a plugin, give that the
+            lowest priority; objects both handled by a plugin and
+            with an underlying object format will be claimed
+            separately by the plugin.  */
+         if (*target == &plugin_vec)
+           match_priority = (*target)->match_priority;
+#endif
+

          match_targ = temp;
          if (preserve.marker != NULL)
            bfd_preserve_finish (abfd, &preserve);
          match_targ = temp;
          if (preserve.marker != NULL)
            bfd_preserve_finish (abfd, &preserve);


@@ -313,9 +333,6 @@ bfd_check_format_matches (bfd *abfd, bfd_format format, char ***matching)
              || (bfd_has_map (abfd)
                  && bfd_get_error () != bfd_error_wrong_object_format))
            {
              || (bfd_has_map (abfd)
                  && bfd_get_error () != bfd_error_wrong_object_format))
            {

-             /* This format checks out as ok!  */
-             right_targ = temp;
-

              /* If this is the default target, accept it, even if
                 other targets might match.  People who want those
                 other targets have to set the GNUTARGET variable.  */
              /* If this is the default target, accept it, even if
                 other targets might match.  People who want those
                 other targets have to set the GNUTARGET variable.  */


@@ -326,12 +343,17 @@ bfd_check_format_matches (bfd *abfd, bfd_format format, char ***matching)
                matching_vector[match_count] = temp;
              match_count++;
 
                matching_vector[match_count] = temp;
              match_count++;
 

-             if (temp->match_priority < best_match)
+             if (match_priority < best_match)

                {
                {

-                 best_match = temp->match_priority;
+                 best_match = match_priority;

                  best_count = 0;
                }
                  best_count = 0;
                }

-             best_count++;
+             if (match_priority <= best_match)
+               {
+                 /* This format checks out as ok!  */
+                 right_targ = temp;
+                 best_count++;
+               }

            }
          else
            {
            }
          else
            {


@@ -430,7 +452,7 @@ bfd_check_format_matches (bfd *abfd, bfd_format format, char ***matching)
         state (except possibly for XVEC).  */
       if (match_targ != right_targ)
        {
         state (except possibly for XVEC).  */
       if (match_targ != right_targ)
        {

-         bfd_reinit (abfd);
+         bfd_reinit (abfd, initial_section_id);

          if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
            goto err_ret;
          match_targ = BFD_SEND_FMT (abfd, _bfd_check_format, (abfd));
          if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
            goto err_ret;
          match_targ = BFD_SEND_FMT (abfd, _bfd_check_format, (abfd));