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[PATCH 6/6] x86/MPX: bndmk, bndldx, and bndstx don't allow RIP-relative addressing

Jan Beulich JBeulich@suse.com
Tue Oct 8 14:44:00 GMT 2013 
gas/
2013-10-08  Jan Beulich <jbeulich@suse.com>

	* tc-i386.c (i386_index_check): Reject RIP-relative addressing for
	bndmk, bndldx, and bndstx. Warn about register scaling by other
	than 1 for bndldx and bndstx.

--- 2013-10-07/gas/config/tc-i386.c
+++ 2013-10-07/gas/config/tc-i386.c
@@ -8360,6 +8375,25 @@ bad_address:
 			   || i.index_reg->reg_num == RegEiz))
 		      || !i.index_reg->reg_type.bitfield.baseindex)))
 	    goto bad_address;
+
+	  /* bndmk, bndldx, and bndstx have special restrictions. */
+	  if (current_templates->start->base_opcode == 0xf30f1b
+	      || (current_templates->start->base_opcode & ~1) == 0x0f1a)
+	    {
+	      /* They cannot use RIP-relative addressing. */
+	      if (i.base_reg
+		  && i.base_reg->reg_num == (addr_mode == CODE_64BIT ? RegRip
+								     : RegEip))
+		{
+		  as_bad (_("`%s' cannot be used here"), operand_string);
+		  return 0;
+		}
+
+	      /* bndldx and bndstx ignore their scale factor. */
+	      if (current_templates->start->base_opcode != 0xf30f1b
+		  && i.log2_scale_factor)
+		as_warn (_("register scaling is being ignored here"));
+	    }
 	}
       else
 	{



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