--- old/usr/src/test/os-tests/tests/xsave/setcontext_replace.c
          +++ new/usr/src/test/os-tests/tests/xsave/setcontext_replace.c

   1    1  /*
   2    2   * This file and its contents are supplied under the terms of the
   3    3   * Common Development and Distribution License ("CDDL"), version 1.0.
   4    4   * You may only use this file in accordance with the terms of version
   5    5   * 1.0 of the CDDL.
   6    6   *
   7    7   * A full copy of the text of the CDDL should have accompanied this
   8    8   * source.  A copy of the CDDL is also available via the Internet at
   9    9   * http://www.illumos.org/license/CDDL.
  10   10   */
  11   11  
  12   12  /*
  13   13   * Copyright 2023 Oxide Computer Company
  14   14   */
  15   15  
  16   16  /*
  17   17   * The purpose of this program is to go through and replace all the FPU
  18   18   * registers in the floating point state in a ucontext_t and verify that we see
  19   19   * what we expected here.
  20   20   */
  21   21  
  22   22  #include <err.h>
  23   23  #include <stdlib.h>
  24   24  #include <ucontext.h>
  25   25  
  26   26  #include "xsave_util.h"
  27   27  
  28   28  xsu_fpu_t to_set, found;
  29   29  
  30   30  static void
  31   31  setcontext_replace_check(uint32_t hwsup)
  32   32  {
  33   33          xsu_getfpu(&found, hwsup);
  34   34          if (xsu_same(&to_set, &found, hwsup)) {
  35   35                  (void) printf("TEST PASSED: setcontext() correctly wrote FPU "
  36   36                      "contents\n");
  37   37                  exit(EXIT_SUCCESS);
  38   38          } else {
  39   39                  errx(EXIT_FAILURE, "TEST_FAILED: setcontext() did not write "
  40   40                      "full FPU state");
  41   41          }
  42   42  }
  43   43  
  44   44  int
  45   45  main(void)
  46   46  {
  47   47          ucontext_t *ctx;
  48   48          uint32_t start = arc4random();
  49   49          uint32_t hwsup = xsu_hwsupport();
  50   50  
  51   51          ctx = ucontext_alloc(0);
  52   52          if (ctx == NULL) {
  53   53                  err(EXIT_FAILURE, "failed to get allocate ucontext_t");
  54   54          }
  55   55          (void) printf("filling starting at 0x%x\n", start);
  56   56          xsu_fill(&to_set, hwsup, start);
  57   57          if (getcontext_extd(ctx, 0) != 0) {
  58   58                  err(EXIT_FAILURE, "failed to get extended context");
  59   59          }
  60   60  
  61   61          xsu_overwrite_uctx(ctx, &to_set, hwsup);
  62   62          makecontext(ctx, setcontext_replace_check, 1, hwsup);
  63   63          (void) setcontext(ctx);
  64   64  
  65   65          err(EXIT_FAILURE, "TEST FAILED: set context did not work!");
  66   66  }

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