1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2023 Oxide Computer Company
14 */
15
16 /*
17 * The purpose of this program is to go through and replace all the FPU
18 * registers in the floating point state in a ucontext_t and verify that we see
19 * what we expected here.
20 */
21
22 #include <err.h>
23 #include <stdlib.h>
24 #include <ucontext.h>
25
26 #include "xsave_util.h"
27
28 xsu_fpu_t to_set, found;
29
30 static void
setcontext_replace_check(uint32_t hwsup)31 setcontext_replace_check(uint32_t hwsup)
32 {
33 xsu_getfpu(&found, hwsup);
34 if (xsu_same(&to_set, &found, hwsup)) {
35 (void) printf("TEST PASSED: setcontext() correctly wrote FPU "
36 "contents\n");
37 exit(EXIT_SUCCESS);
38 } else {
39 errx(EXIT_FAILURE, "TEST_FAILED: setcontext() did not write "
40 "full FPU state");
41 }
42 }
43
44 int
main(void)45 main(void)
46 {
47 ucontext_t *ctx;
48 uint32_t start = arc4random();
49 uint32_t hwsup = xsu_hwsupport();
50
51 ctx = ucontext_alloc(0);
52 if (ctx == NULL) {
53 err(EXIT_FAILURE, "failed to get allocate ucontext_t");
54 }
55 (void) printf("filling starting at 0x%x\n", start);
56 xsu_fill(&to_set, hwsup, start);
57 if (getcontext_extd(ctx, 0) != 0) {
58 err(EXIT_FAILURE, "failed to get extended context");
59 }
60
61 xsu_overwrite_uctx(ctx, &to_set, hwsup);
62 xsu_ustack_alloc(ctx);
63 makecontext(ctx, setcontext_replace_check, 1, hwsup);
64 (void) setcontext(ctx);
65
66 err(EXIT_FAILURE, "TEST FAILED: set context did not work!");
67 }
68