PR26103, Assertion failure with symbols defined in link-once sections

	PR 26103
	* elflink.c (elf_link_add_archive_symbols): Exclude undefined
	symbols that were defined in discarded sections.
	* cofflink.c (coff_link_check_archive_element): Likewise.
	(coff_link_add_symbols): Set indx to -3 for symbols defined in
	discarded sections.
	(_bfd_coff_write_global_sym): Don't emit such symbols.
	libcoff-in.h (struct coff_link_hash_entry): Update indx comment.
	libcoff.h: Regenerate.

1 files changed, 17 insertions, 1 deletions

diff --git a/bfd/cofflink.c b/bfd/cofflink.c
index 27ac20e..63bdcde 100644
--- a/bfd/cofflink.c
+++ b/bfd/cofflink.c
@@ -212,6 +212,12 @@ coff_link_check_archive_element (bfd *abfd,
   if (h->type != bfd_link_hash_undefined)
     return TRUE;
 
+  /* If the archive element has already been loaded then one
+     of the symbols defined by that element might have been
+     made undefined due to being in a discarded section.  */
+  if (((struct coff_link_hash_entry *) h)->indx == -3)
+    return TRUE;
+
   /* PR 22369 - Skip non COFF objects in the archive.  */
   if (! bfd_family_coff (abfd))
     return TRUE;
@@ -286,6 +292,7 @@ coff_link_add_symbols (bfd *abfd,
 	  asection *section;
 	  bfd_vma value;
 	  bfd_boolean addit;
+	  bfd_boolean discarded = FALSE;
 
 	  /* This symbol is externally visible.  */
 
@@ -311,7 +318,10 @@ coff_link_add_symbols (bfd *abfd,
 	      flags = BSF_EXPORT | BSF_GLOBAL;
 	      section = coff_section_from_bfd_index (abfd, sym.n_scnum);
 	      if (discarded_section (section))
-		section = bfd_und_section_ptr;
+		{
+		  discarded = TRUE;
+		  section = bfd_und_section_ptr;
+		}
 	      else if (! obj_pe (abfd))
 		value -= section->vma;
 	      break;
@@ -408,6 +418,9 @@ coff_link_add_symbols (bfd *abfd,
 		      (const char *) NULL, copy, FALSE,
 		      (struct bfd_link_hash_entry **) sym_hash)))
 		goto error_return;
+
+	      if (discarded)
+		(*sym_hash)->indx = -3;
 	    }
 
 	  if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0)
@@ -2567,6 +2580,9 @@ _bfd_coff_write_global_sym (struct bfd_hash_entry *bh, void *data)
       return FALSE;
 
     case bfd_link_hash_undefined:
+      if (h->indx == -3)
+	return TRUE;
+      /* Fall through.  */
     case bfd_link_hash_undefweak:
       isym.n_scnum = N_UNDEF;
       isym.n_value = 0;