--- old/usr/src/lib/libc/amd64/gen/siglongjmp.c
          +++ new/usr/src/lib/libc/amd64/gen/siglongjmp.c

   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  /*
  23   23   * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24   24   * Use is subject to license terms.
  25   25   */
  26   26  
  27   27  /*
  28   28   * Copyright 2023 Oxide Computer Company
  29   29   */
  30   30  
  31   31  #include "lint.h"
  32   32  #include <sys/types.h>
  33   33  #include <sys/ucontext.h>
  34   34  #include <setjmp.h>
  35   35  #include <ucontext.h>
  36   36  #include <strings.h>
  37   37  #include <upanic.h>
  38   38  #include "sigjmp_struct.h"
  39   39  #include "libc.h"
  40   40  
  41   41  #pragma weak _siglongjmp = siglongjmp
  42   42  
  43   43  void
  44   44  siglongjmp(sigjmp_buf env, int val)
  45   45  {
  46   46          const char *msg = "siglongjmp(): setcontext() returned";
  47   47          ucontext_t *ucp = SIGJMP2UCONTEXT(env);
  48   48  
  49   49          if (val)
  50   50                  ucp->uc_mcontext.gregs[REG_R0] = val;
  51   51          else
  52   52                  ucp->uc_mcontext.gregs[REG_R0] = 1;
  53   53  
  54   54          /*
  55   55           * While unlikely, it is possible that setcontext() may fail for some
  56   56           * reason. If that happens, we will kill the process.
  57   57           */
  58   58          (void) setcontext(ucp);
  59   59          upanic(msg, strlen(msg) + 1);
  60   60  }

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