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1 | /* This file is part of GDB, the GNU debugger. |
2 | ||
b811d2c2 | 3 | Copyright 2008-2020 Free Software Foundation, Inc. |
9404b58f KM |
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 | int main(void) | |
19 | { | |
20 | unsigned long tmp, cond; | |
21 | unsigned long dword = 0; | |
22 | ||
23 | /* Test that we can step over ldxr/stxr. This sequence should step from | |
24 | ldxr to the following __asm __volatile. */ | |
25 | __asm __volatile ("1: ldxr %0,%2\n" \ | |
26 | " cmp %0,#1\n" \ | |
27 | " b.eq out\n" \ | |
28 | " add %0,%0,1\n" \ | |
29 | " stxr %w1,%0,%2\n" \ | |
30 | " cbnz %w1,1b" \ | |
31 | : "=&r" (tmp), "=&r" (cond), "+Q" (dword) \ | |
32 | : : "memory"); | |
33 | ||
34 | /* This sequence should take the conditional branch and step from ldxr | |
35 | to the return dword line. */ | |
36 | __asm __volatile ("1: ldxr %0,%2\n" \ | |
37 | " cmp %0,#1\n" \ | |
38 | " b.eq out\n" \ | |
39 | " add %0,%0,1\n" \ | |
40 | " stxr %w1,%0,%2\n" \ | |
41 | " cbnz %w1,1b\n" \ | |
42 | : "=&r" (tmp), "=&r" (cond), "+Q" (dword) \ | |
43 | : : "memory"); | |
44 | ||
45 | dword = -1; | |
46 | __asm __volatile ("out:\n"); | |
47 | return dword; | |
48 | } |