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 <stdlib.h> 14 #include <signal.h> 15 16 #include "utils.h" 17 18 void trap_signal_handler(int signo, siginfo_t *si, void *uc) 19 { 20 ucontext_t *ucp = (ucontext_t *) uc; 21 22 asm("tbegin.; tsuspend.;"); 23 24 /* Skip 'trap' instruction if it succeed */ 25 ucp->uc_mcontext.regs->nip += 4; 26 } 27 28 int tm_signal_sigreturn_nt(void) 29 { 30 struct sigaction trap_sa; 31 32 trap_sa.sa_flags = SA_SIGINFO; 33 trap_sa.sa_sigaction = trap_signal_handler; 34 35 sigaction(SIGTRAP, &trap_sa, NULL); 36 37 raise(SIGTRAP); 38 39 return EXIT_SUCCESS; 40 } 41 42 int main(int argc, char **argv) 43 { 44 test_harness(tm_signal_sigreturn_nt, "tm_signal_sigreturn_nt"); 45 } 46 47