134642d70SBreno Leitao // SPDX-License-Identifier: GPL-2.0
234642d70SBreno Leitao /*
334642d70SBreno Leitao * Copyright 2018, Breno Leitao, Gustavo Romero, IBM Corp.
434642d70SBreno Leitao *
534642d70SBreno Leitao * A test case that creates a signal and starts a suspended transaction
634642d70SBreno Leitao * inside the signal handler.
734642d70SBreno Leitao *
834642d70SBreno Leitao * It returns from the signal handler with the CPU at suspended state, but
934642d70SBreno Leitao * without setting usercontext MSR Transaction State (TS) fields.
1034642d70SBreno Leitao */
1134642d70SBreno Leitao
1234642d70SBreno Leitao #define _GNU_SOURCE
1350512706SMichael Ellerman #include <stdio.h>
1434642d70SBreno Leitao #include <stdlib.h>
1534642d70SBreno Leitao #include <signal.h>
1634642d70SBreno Leitao
1734642d70SBreno Leitao #include "utils.h"
1850512706SMichael Ellerman #include "tm.h"
1934642d70SBreno Leitao
trap_signal_handler(int signo,siginfo_t * si,void * uc)2034642d70SBreno Leitao void trap_signal_handler(int signo, siginfo_t *si, void *uc)
2134642d70SBreno Leitao {
2234642d70SBreno Leitao ucontext_t *ucp = (ucontext_t *) uc;
2334642d70SBreno Leitao
2434642d70SBreno Leitao asm("tbegin.; tsuspend.;");
2534642d70SBreno Leitao
2634642d70SBreno Leitao /* Skip 'trap' instruction if it succeed */
2734642d70SBreno Leitao ucp->uc_mcontext.regs->nip += 4;
2834642d70SBreno Leitao }
2934642d70SBreno Leitao
tm_signal_sigreturn_nt(void)3034642d70SBreno Leitao int tm_signal_sigreturn_nt(void)
3134642d70SBreno Leitao {
3234642d70SBreno Leitao struct sigaction trap_sa;
3334642d70SBreno Leitao
3450512706SMichael Ellerman SKIP_IF(!have_htm());
35*e42edf9bSJordan Niethe SKIP_IF(htm_is_synthetic());
3650512706SMichael Ellerman
3734642d70SBreno Leitao trap_sa.sa_flags = SA_SIGINFO;
3834642d70SBreno Leitao trap_sa.sa_sigaction = trap_signal_handler;
3934642d70SBreno Leitao
4034642d70SBreno Leitao sigaction(SIGTRAP, &trap_sa, NULL);
4134642d70SBreno Leitao
4234642d70SBreno Leitao raise(SIGTRAP);
4334642d70SBreno Leitao
4434642d70SBreno Leitao return EXIT_SUCCESS;
4534642d70SBreno Leitao }
4634642d70SBreno Leitao
main(int argc,char ** argv)4734642d70SBreno Leitao int main(int argc, char **argv)
4834642d70SBreno Leitao {
4934642d70SBreno Leitao test_harness(tm_signal_sigreturn_nt, "tm_signal_sigreturn_nt");
5034642d70SBreno Leitao }
5134642d70SBreno Leitao
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