| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | /* |
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| 3 | * Copyright 2018, Breno Leitao, Gustavo Romero, IBM Corp. |
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| 4 | * |
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| 5 | * A test case that creates a signal and starts a suspended transaction |
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| 6 | * inside the signal handler. |
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| 7 | * |
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| 8 | * It returns from the signal handler with the CPU at suspended state, but |
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| 9 | * without setting usercontext MSR Transaction State (TS) fields. |
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| 10 | */ |
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| 11 | |
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| 12 | #define _GNU_SOURCE |
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| 13 | #include <stdio.h> |
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| 14 | #include <stdlib.h> |
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| 15 | #include <signal.h> |
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| 16 | |
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| 17 | #include "utils.h" |
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| 18 | #include "tm.h" |
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| 19 | |
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| 20 | void trap_signal_handler(int signo, siginfo_t *si, void *uc) |
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| 21 | { |
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| 22 | ucontext_t *ucp = (ucontext_t *) uc; |
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| 23 | |
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| 24 | asm("tbegin.; tsuspend.;" ); |
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| 25 | |
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| 26 | /* Skip 'trap' instruction if it succeed */ |
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| 27 | ucp->uc_mcontext.regs->nip += 4; |
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| 28 | } |
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| 29 | |
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| 30 | int tm_signal_sigreturn_nt(void) |
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| 31 | { |
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| 32 | struct sigaction trap_sa; |
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| 33 | |
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| 34 | SKIP_IF(!have_htm()); |
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| 35 | SKIP_IF(htm_is_synthetic()); |
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| 36 | |
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| 37 | trap_sa.sa_flags = SA_SIGINFO; |
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| 38 | trap_sa.sa_sigaction = trap_signal_handler; |
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| 39 | |
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| 40 | sigaction(SIGTRAP, &trap_sa, NULL); |
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| 41 | |
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| 42 | raise(SIGTRAP); |
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| 43 | |
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| 44 | return EXIT_SUCCESS; |
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| 45 | } |
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| 46 | |
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| 47 | int main(int argc, char **argv) |
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| 48 | { |
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| 49 | test_harness(tm_signal_sigreturn_nt, "tm_signal_sigreturn_nt" ); |
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| 50 | } |
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| 51 | |
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| 52 | |
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