// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright 2018, Breno Leitao, Gustavo Romero, IBM Corp.
 *
 * A test case that creates a signal and starts a suspended transaction
 * inside the signal handler.
 *
 * It returns from the signal handler with the CPU at suspended state, but
 * without setting usercontext MSR Transaction State (TS) fields.
 */

#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>

#include "utils.h"
#include "tm.h"

void trap_signal_handler(int signo, siginfo_t *si, void *uc)
{
        ucontext_t *ucp = (ucontext_t *) uc;

        asm("tbegin.; tsuspend.;");

        /* Skip 'trap' instruction if it succeed */
        ucp->uc_mcontext.regs->nip += 4;
}

int tm_signal_sigreturn_nt(void)
{
        struct sigaction trap_sa;

        SKIP_IF(!have_htm());
        SKIP_IF(htm_is_synthetic());

        trap_sa.sa_flags = SA_SIGINFO;
        trap_sa.sa_sigaction = trap_signal_handler;

        sigaction(SIGTRAP, &trap_sa, NULL);

        raise(SIGTRAP);

        return EXIT_SUCCESS;
}

int main(int argc, char **argv)
{
        return test_harness(tm_signal_sigreturn_nt, "tm_signal_sigreturn_nt");
}