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// 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)
{
test_harness(tm_signal_sigreturn_nt, "tm_signal_sigreturn_nt");
}
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