11787 Kernel needs to be built with retpolines
11788 Kernel needs to generally use RSB stuffing
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: John Levon <john.levon@joyent.com>

*** 18,27 ****
--- 18,28 ----
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
+  * Copyright 2019 Joyent, Inc.
   */
  
  /*      Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
  /*      Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T   */
  /*        All Rights Reserved                                   */
*** 97,107 ****
          movb    $255, TTR_VECTOR(%r12)
          movq    %r12, %rsi              /* pass traptrace record pointer */
  #endif
  
          movq    %rsp, %rdi              /* pass struct regs pointer */
!         call    *do_interrupt_common
  
          jmp     _sys_rtt_ints_disabled
          /*NOTREACHED*/
  
          SET_SIZE(cmnint)
--- 98,109 ----
          movb    $255, TTR_VECTOR(%r12)
          movq    %r12, %rsi              /* pass traptrace record pointer */
  #endif
  
          movq    %rsp, %rdi              /* pass struct regs pointer */
!         movq    do_interrupt_common, %rax
!         INDIRECT_CALL_REG(rax)
  
          jmp     _sys_rtt_ints_disabled
          /*NOTREACHED*/
  
          SET_SIZE(cmnint)