/*
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* Check decoding of signal syscall.
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*
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* Copyright (c) 2017 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#ifdef __NR_signal
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# include <errno.h>
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# include <signal.h>
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# include <stdio.h>
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# include <stdint.h>
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# include <string.h>
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# include <unistd.h>
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static long
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k_signal(const kernel_ulong_t signum, const kernel_ulong_t handler)
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{
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return syscall(__NR_signal, signum, handler);
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}
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int
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main(void)
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{
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static const uintptr_t sig_ign = (uintptr_t) SIG_IGN;
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static const uintptr_t sig_dfl = (uintptr_t) SIG_DFL;
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static const kernel_ulong_t sigusr1 =
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(kernel_ulong_t) 0xfacefeed00000000ULL | SIGUSR1;
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static const struct sigaction act = { .sa_handler = SIG_DFL };
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long rc;
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sigset_t mask;
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sigemptyset(&mask);
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sigaddset(&mask, SIGUSR1);
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if (sigprocmask(SIG_BLOCK, &mask, NULL))
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perror_msg_and_fail("sigprocmask SIG_BLOCK");
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if (sigaction(SIGUSR1, &act, NULL))
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perror_msg_and_fail("sigaction");
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rc = k_signal(sigusr1, sig_ign);
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if (rc == -1L) {
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printf("signal(SIGUSR1, SIG_IGN) = %s\n", sprintrc(rc));
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} else if (rc != (long) sig_dfl) {
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error_msg_and_fail("signal(SIGUSR1, SIG_IGN) = %#lx\n", rc);
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} else {
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printf("signal(SIGUSR1, SIG_IGN) = %#lx (SIG_DFL)\n", rc);
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/*
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* Raise and unblock SIGUSR1.
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* If signal syscall failed to set SIGUSR1 handler to SIG_IGN,
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* the process will be terminated by SIGUSR1.
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*/
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raise(SIGUSR1);
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if (sigprocmask(SIG_UNBLOCK, &mask, NULL))
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perror_msg_and_fail("sigprocmask SIG_UNBLOCK");
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if (sigprocmask(SIG_BLOCK, &mask, NULL))
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perror_msg_and_fail("sigprocmask SIG_BLOCK");
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}
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rc = k_signal(SIGUSR1, sig_dfl);
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if (rc == -1L) {
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printf("signal(SIGUSR1, SIG_DFL) = %s\n", sprintrc(rc));
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} else if (rc != (long) sig_ign) {
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error_msg_and_fail("signal(SIGUSR1, SIG_DFL) = %#lx\n", rc);
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} else {
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printf("signal(SIGUSR1, SIG_DFL) = %#lx (SIG_IGN)\n", rc);
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}
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const kernel_ulong_t addr = (kernel_ulong_t) 0xfacefeeddeadbeefULL;
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rc = k_signal(SIGUSR1, addr);
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if (rc == -1L) {
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printf("signal(SIGUSR1, %#llx) = %s\n",
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(unsigned long long) addr, sprintrc(rc));
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} else if (rc != (long) sig_dfl) {
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error_msg_and_fail("signal(SIGUSR1, %#llx) = %#lx\n",
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(unsigned long long) addr, rc);
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} else {
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printf("signal(SIGUSR1, %#llx) = %#lx (SIG_DFL)\n",
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(unsigned long long) addr, rc);
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}
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rc = k_signal(SIGUSR1, sig_ign);
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if (rc == -1L) {
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printf("signal(SIGUSR1, SIG_IGN) = %s\n", sprintrc(rc));
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} else {
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printf("signal(SIGUSR1, SIG_IGN) = %#lx\n", rc);
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}
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rc = k_signal(addr, sig_ign);
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printf("signal(%d, SIG_IGN) = %s\n", (int) addr, sprintrc(rc));
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_signal")
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#endif
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