1 | /* Copyright (C) 2008-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <stdlib.h> |
20 | #include <stdio.h> |
21 | #include <string.h> |
22 | #include <ucontext.h> |
23 | #include <tst-stack-align.h> |
24 | |
25 | ucontext_t ucp, ucp2; |
26 | char st1[262144] __attribute__((aligned (16))); |
27 | |
28 | void |
29 | cf (int i, int j) |
30 | { |
31 | if (i != 78 || j != 274) |
32 | { |
33 | printf (format: "i %d j %d\n" , i, j); |
34 | exit (1); |
35 | } |
36 | else if (TEST_STACK_ALIGN ()) |
37 | { |
38 | puts (s: "insufficiently aligned stack" ); |
39 | exit (2); |
40 | } |
41 | } |
42 | |
43 | int |
44 | do_test (void) |
45 | { |
46 | for (size_t j = 32; j < 64; j += sizeof (long)) |
47 | { |
48 | if (getcontext (ucp: &ucp) != 0) |
49 | { |
50 | if (errno == ENOSYS) |
51 | { |
52 | puts (s: "context handling not supported" ); |
53 | return 0; |
54 | } |
55 | |
56 | puts (s: "getcontext failed" ); |
57 | return 1; |
58 | } |
59 | ucp.uc_link = &ucp2; |
60 | ucp.uc_stack.ss_sp = st1; |
61 | ucp.uc_stack.ss_size = sizeof (st1) - j; |
62 | memset (&st1[sizeof (st1) - j], 0x55, j); |
63 | makecontext (ucp: &ucp, func: (void (*) (void)) cf, argc: 2, 78, 274); |
64 | if (swapcontext (oucp: &ucp2, ucp: &ucp) != 0) |
65 | { |
66 | puts (s: "setcontext failed" ); |
67 | return 1; |
68 | } |
69 | |
70 | for (size_t i = j; i > 0; i--) |
71 | if (st1[sizeof (st1) - j + i - 1] != 0x55) |
72 | { printf (format: "fail %zd %zd\n" , i, j); break; } |
73 | } |
74 | |
75 | return 0; |
76 | } |
77 | |
78 | #define TEST_FUNCTION do_test () |
79 | #include "../test-skeleton.c" |
80 | |