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>

          --- old/usr/src/uts/intel/amd64/krtld/kobj_crt.s
          +++ new/usr/src/uts/intel/amd64/krtld/kobj_crt.s

   1    1  /*
   2    2   * CDDL HEADER START
   3    3   *
   4    4   * The contents of this file are subject to the terms of the
   5    5   * Common Development and Distribution License (the "License").
   6    6   * You may not use this file except in compliance with the License.
   7    7   *
   8    8   * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9    9   * or http://www.opensolaris.org/os/licensing.
  10   10   * See the License for the specific language governing permissions
  11   11   * and limitations under the License.
  12   12   *
  13   13   * When distributing Covered Code, include this CDDL HEADER in each

  14   14   * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15   15   * If applicable, add the following below this CDDL HEADER, with the
  16   16   * fields enclosed by brackets "[]" replaced with your own identifying
  17   17   * information: Portions Copyright [yyyy] [name of copyright owner]
  18   18   *
  19   19   * CDDL HEADER END
  20   20   */
  21   21  /*
  22   22   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23   23   * Use is subject to license terms.
       24 + * Copyright 2019 Joyent, Inc.
  24   25   */
  25   26  
  26      -#pragma ident   "%Z%%M% %I%     %E% SMI"
  27      -
  28   27  /*
  29   28   * exit routine from linker/loader to kernel
  30   29   */
  31   30  
  32   31  #include <sys/asm_linkage.h>
  33   32  #include <sys/reboot.h>
  34   33  
  35   34  /*
  36   35   *  exitto is called from main() and does 1 things
  37   36   *      It then jumps directly to the just-loaded standalone.

  38   37   *      There is NO RETURN from exitto().
  39   38   */
  40   39  
  41   40  #if defined(lint)
  42   41  
  43   42  /* ARGSUSED */
  44   43  void
  45   44  exitto(caddr_t entrypoint)
  46   45  {}
  47   46  
  48   47  #else   /* lint */
  49   48  
  50   49  
  51   50          ENTRY(exitto)
  52   51  
  53   52          /preserve destination in temporary register %r11
  54   53          movq    %rdi, %r11
  55   54  
  56   55          /holds address of array of pointers to functions

  57   56          / $arg1
  58   57          movq    $romp, %rax
  59   58          movq    (%rax), %rdi
  60   59  
  61   60          /holds address of bootops structure
  62   61          / $arg2
  63   62          movq    $ops, %rax
  64   63          movq    (%rax), %rdx
  65   64  
  66   65          / Call destination
  67      -        call   *%r11
       66 +        INDIRECT_CALL_REG(r11)
  68   67  
  69   68          SET_SIZE(exitto)
  70   69  
  71   70  #endif
  72   71  
    

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