Commit | Line | Data |
---|---|---|
a3b60e45 JK |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
b811d2c2 | 3 | Copyright 2017-2020 Free Software Foundation, Inc. |
a3b60e45 JK |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <stdint.h> | |
19 | #include <assert.h> | |
20 | ||
21 | static int again; | |
22 | ||
23 | static volatile struct | |
24 | { | |
25 | uint64_t alignment; | |
26 | union | |
27 | { | |
28 | uint64_t size8[1]; | |
29 | uint32_t size4[2]; | |
30 | uint16_t size2[4]; | |
31 | uint8_t size1[8]; | |
32 | uint64_t size8twice[2]; | |
33 | } | |
34 | u; | |
35 | } data; | |
36 | ||
37 | static int size = 0; | |
38 | static int offset; | |
39 | ||
40 | static void | |
41 | write_size8twice (void) | |
42 | { | |
43 | static const uint64_t first = 1; | |
44 | static const uint64_t second = 2; | |
45 | ||
46 | #ifdef __aarch64__ | |
47 | asm volatile ("stp %1, %2, [%0]" | |
48 | : /* output */ | |
49 | : "r" (data.u.size8twice), "r" (first), "r" (second) /* input */ | |
50 | : "memory" /* clobber */); | |
51 | #else | |
52 | data.u.size8twice[0] = first; | |
53 | data.u.size8twice[1] = second; | |
54 | #endif | |
55 | } | |
56 | ||
57 | int | |
58 | main (void) | |
59 | { | |
60 | volatile uint64_t local; | |
61 | ||
62 | assert (sizeof (data) == 8 + 2 * 8); | |
63 | ||
64 | write_size8twice (); | |
65 | ||
66 | while (size) | |
67 | { | |
68 | switch (size) | |
69 | { | |
70 | /* __s390x__ also defines __s390__ */ | |
71 | #ifdef __s390__ | |
72 | # define ACCESS(var) var = ~var | |
73 | #else | |
74 | # define ACCESS(var) local = var | |
75 | #endif | |
76 | case 8: | |
77 | ACCESS (data.u.size8[offset]); | |
78 | break; | |
79 | case 4: | |
80 | ACCESS (data.u.size4[offset]); | |
81 | break; | |
82 | case 2: | |
83 | ACCESS (data.u.size2[offset]); | |
84 | break; | |
85 | case 1: | |
86 | ACCESS (data.u.size1[offset]); | |
87 | break; | |
88 | #undef ACCESS | |
89 | default: | |
90 | assert (0); | |
91 | } | |
92 | size = 0; | |
93 | size = size; /* start_again */ | |
94 | } | |
95 | return 0; /* final_return */ | |
96 | } |