bfd/

	* coff-rs6000.c (xcoff_howto_table): Change size to 0 and bitsize to 1.
	(_bfd_xcoff_reloc_type_lookup): Handle BFD_RELOC_NONE.
	* coff64-rs6000.c (xcoff64_howto_table): Change size to 0 and
	bitsize to 1.
	(xcoff64_reloc_type_lookup): Handle BFD_RELOC_NONE.

gas/
	* write.h (fix_at_start): Declare.
	* write.c (fix_new_internal): Add at_beginning parameter.
	Use it instead of REVERSE_SORT_RELOCS.  Fix the handling of
	seg_fix_tailP for the at_beginning/REVERSE_SORT_RELOCS case.
	(fix_new, fix_new_exp): Update accordingly.
	(fix_at_start): New function.
	* config/tc-ppc.c (md_pseudo_table): Add .ref to the OBJ_XCOFF section.
	(ppc_ref): New function, for OBJ_XCOFF.
	(md_apply_fix): Handle BFD_RELOC_NONE for OBJ_XCOFF.
	* config/te-i386aix.h (REVERSE_SORT_RELOCS): Remove #undef.

gas/testsuite/
	* gas/ppc/xcoff-ref-1.s, gas/ppc/xcoff-ref-1.l: New test.
	* gas/ppc/aix.exp: Run it.


ld/testsuite/
	* ld-powerpc/aix-ref-1-32.od, ld-powerpc/aix-ref-1-64.od,
	ld-powerpc/aix-ref-1.s: New tests.
	* ld-powerpc/aix52.exp: Run them.

2 files changed, 59 insertions, 4 deletions

diff --git a/gas/config/tc-ppc.c b/gas/config/tc-ppc.c
index 327f3c1573..212f822510 100644
--- a/gas/config/tc-ppc.c
+++ b/gas/config/tc-ppc.c
@@ -108,6 +108,7 @@ static void ppc_change_csect (symbolS *, offsetT);
 static void ppc_function (int);
 static void ppc_extern (int);
 static void ppc_lglobl (int);
+static void ppc_ref (int);
 static void ppc_section (int);
 static void ppc_named_section (int);
 static void ppc_stabx (int);
@@ -212,6 +213,7 @@ const pseudo_typeS md_pseudo_table[] =
   { "extern",	ppc_extern,	0 },
   { "function",	ppc_function,	0 },
   { "lglobl",	ppc_lglobl,	0 },
+  { "ref",	ppc_ref,	0 },
   { "rename",	ppc_rename,	0 },
   { "section",	ppc_named_section, 0 },
   { "stabx",	ppc_stabx,	0 },
@@ -3559,6 +3561,58 @@ ppc_lglobl (int ignore ATTRIBUTE_UNUSED)
   demand_empty_rest_of_line ();
 }
 
+/* The .ref pseudo-op.  It takes a list of symbol names and inserts R_REF
+   relocations at the beginning of the current csect.
+
+   (In principle, there's no reason why the relocations _have_ to be at
+   the beginning.  Anywhere in the csect would do.  However, inserting
+   at the beginning is what the native assmebler does, and it helps to
+   deal with cases where the .ref statements follow the section contents.)
+
+   ??? .refs don't work for empty .csects.  However, the native assembler
+   doesn't report an error in this case, and neither yet do we.  */
+
+static void
+ppc_ref (int ignore ATTRIBUTE_UNUSED)
+{
+  char *name;
+  char c;
+
+  if (ppc_current_csect == NULL)
+    {
+      as_bad (_(".ref outside .csect"));
+      ignore_rest_of_line ();
+      return;
+    }
+
+  do
+    {
+      name = input_line_pointer;
+      c = get_symbol_end ();
+
+      fix_at_start (symbol_get_frag (ppc_current_csect), 0,
+		    symbol_find_or_make (name), 0, FALSE, BFD_RELOC_NONE);
+
+      *input_line_pointer = c;
+      SKIP_WHITESPACE ();
+      c = *input_line_pointer;
+      if (c == ',')
+	{
+	  input_line_pointer++;
+	  SKIP_WHITESPACE ();
+	  if (is_end_of_line[(unsigned char) *input_line_pointer])
+	    {
+	      as_bad (_("missing symbol name"));
+	      ignore_rest_of_line ();
+	      return;
+	    }
+	}
+    }
+  while (c == ',');
+
+  demand_empty_rest_of_line ();
+}
+
 /* The .rename pseudo-op.  The RS/6000 assembler can rename symbols,
    although I don't know why it bothers.  */
 
@@ -6032,6 +6086,11 @@ md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
 			      PPC_HA (value), 2);
 	  break;
 
+#ifdef OBJ_XCOFF
+	case BFD_RELOC_NONE:
+	  break;
+#endif
+
 #ifdef OBJ_ELF
 	case BFD_RELOC_PPC64_HIGHER:
 	  if (fixP->fx_pcrel)
diff --git a/gas/config/te-i386aix.h b/gas/config/te-i386aix.h
index 04ce4643b9..2b174a9002 100644
--- a/gas/config/te-i386aix.h
+++ b/gas/config/te-i386aix.h
@@ -24,10 +24,6 @@
 
 #include "obj-format.h"
 
-/* Undefine REVERSE_SORT_RELOCS to keep the relocation entries sorted
-   in ascending vaddr.  */
-#undef REVERSE_SORT_RELOCS
-
 /* Define KEEP_RELOC_INFO so that the strip reloc info flag F_RELFLG is
    not used in the filehdr for COFF output.  */
 #define KEEP_RELOC_INFO