Fix the linker script parser so that it will recognise the PT_GNU_RELRO segment type, and the linker itself so that it will gracefully handle being unable to assign any sections to such a segment.

PR 28452
bfd	* elf.c (assign_file_positions_for_non_load_sections): Replace
	assertion with a warning message.

ld	* ldgram.y: Add support for PT_GNU_RELRO and PT_GNU_PROPERTY.
	* ldgram.c: Regenerate.

bfd/ChangeLog

@@ -1,3 +1,9 @@
+2021-11-17  Nick Clifton  <nickc@redhat.com>
+
+	PR 28452
+	* elf.c (assign_file_positions_for_non_load_sections): Replace
+	assertion with a warning message.
+
 2021-10-19  Nick Clifton  <nickc@redhat.com>
 
 	* linker.c (_bfd_generic_link_add_one_symbol): Test for a NULL

bfd/elf.c

@@ -6261,10 +6261,15 @@ assign_file_positions_for_non_load_sections (bfd *abfd,
 		    }
 		}
 	    }
-	  if (link_info != NULL)
-	    BFD_ASSERT (ok);
+
 	  if (!ok)
-	    memset (p, 0, sizeof *p);
+	    {
+	      if (link_info != NULL)
+		_bfd_error_handler
+		  (_("%pB: warning: unable to allocate any sections to PT_GNU_RELRO segment"),
+		   abfd);
+	      memset (p, 0, sizeof *p);
+	    }
 	}
       else if (p->p_type == PT_GNU_STACK)
 	{

ld/ChangeLog

@@ -1,3 +1,9 @@
+2021-11-17  Nick Clifton  <nickc@redhat.com>
+
+	PR 28452
+	* ldgram.y: Add support for PT_GNU_RELRO and PT_GNU_PROPERTY.
+	* ldgram.c: Regenerate.
+
 2021-11-15  Roland McGrath  <mcgrathr@google.com>
 
 	* testsuite/ld-aarch64/dt_textrel.d: Pass explicit -z notext in

ld/ldgram.y

@@ -1262,6 +1262,10 @@ phdr_type:
 			    $$ = exp_intop (0x6474e550);
 			  else if (strcmp (s, "PT_GNU_STACK") == 0)
 			    $$ = exp_intop (0x6474e551);
+			  else if (strcmp (s, "PT_GNU_RELRO") == 0)
+			    $$ = exp_intop (0x6474e552);
+			  else if (strcmp (s, "PT_GNU_PROPERTY") == 0)
+			    $$ = exp_intop (0x6474e553);
 			  else
 			    {
 			      einfo (_("\