// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2018, Breno Leitao, Gustavo Romero, IBM Corp.
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*
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* A test case that creates a signal and starts a suspended transaction
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* inside the signal handler.
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*
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* It returns from the signal handler with the CPU at suspended state, but
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* without setting usercontext MSR Transaction State (TS) fields.
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include "utils.h"
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#include "tm.h"
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void trap_signal_handler(int signo, siginfo_t *si, void *uc)
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{
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ucontext_t *ucp = (ucontext_t *) uc;
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asm("tbegin.; tsuspend.;");
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/* Skip 'trap' instruction if it succeed */
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ucp->uc_mcontext.regs->nip += 4;
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}
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int tm_signal_sigreturn_nt(void)
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{
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struct sigaction trap_sa;
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SKIP_IF(!have_htm());
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trap_sa.sa_flags = SA_SIGINFO;
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trap_sa.sa_sigaction = trap_signal_handler;
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sigaction(SIGTRAP, &trap_sa, NULL);
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raise(SIGTRAP);
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return EXIT_SUCCESS;
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}
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int main(int argc, char **argv)
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{
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test_harness(tm_signal_sigreturn_nt, "tm_signal_sigreturn_nt");
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}
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