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Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux...
[J-linux.git] / tools / testing / selftests / powerpc / tm / tm-signal-sigreturn-nt.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright 2018, Breno Leitao, Gustavo Romero, IBM Corp.
4  *
5  * A test case that creates a signal and starts a suspended transaction
6  * inside the signal handler.
7  *
8  * It returns from the signal handler with the CPU at suspended state, but
9  * without setting usercontext MSR Transaction State (TS) fields.
10  */
11
12 #define _GNU_SOURCE
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <signal.h>
16
17 #include "utils.h"
18 #include "tm.h"
19
20 void trap_signal_handler(int signo, siginfo_t *si, void *uc)
21 {
22         ucontext_t *ucp = (ucontext_t *) uc;
23
24         asm("tbegin.; tsuspend.;");
25
26         /* Skip 'trap' instruction if it succeed */
27         ucp->uc_mcontext.regs->nip += 4;
28 }
29
30 int tm_signal_sigreturn_nt(void)
31 {
32         struct sigaction trap_sa;
33
34         SKIP_IF(!have_htm());
35         SKIP_IF(htm_is_synthetic());
36
37         trap_sa.sa_flags = SA_SIGINFO;
38         trap_sa.sa_sigaction = trap_signal_handler;
39
40         sigaction(SIGTRAP, &trap_sa, NULL);
41
42         raise(SIGTRAP);
43
44         return EXIT_SUCCESS;
45 }
46
47 int main(int argc, char **argv)
48 {
49         test_harness(tm_signal_sigreturn_nt, "tm_signal_sigreturn_nt");
50 }
51
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