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8d619c01 EBM |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2018-2020 Free Software Foundation, Inc. |
8d619c01 EBM |
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 | /* Touch DSCR. Some kernels won't schedule the thread with a DSCR | |
21 | altered by ptrace unless the register was used at some point. */ | |
22 | unsigned long dscr = 0x0; | |
23 | ||
24 | /* This is the non-privileged SPR number to access DSCR, | |
25 | available since isa 207. */ | |
26 | asm volatile ("mtspr 3,%0" : : "r" (dscr)); | |
27 | ||
28 | asm volatile ("tbegin."); // first marker | |
29 | asm volatile goto ("bc 12,2,%l[end]" | |
30 | : | |
31 | : | |
32 | : | |
33 | : end); | |
34 | asm volatile ("tabort. 0"); | |
35 | end: | |
36 | asm volatile ("nop"); // second marker | |
37 | ||
38 | return 0; | |
39 | } |