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 52