/* * Check decoding of ppoll syscall. * * Copyright (c) 2015-2017 Dmitry V. Levin * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "tests.h" #include #ifdef __NR_ppoll # include # include # include # include # include # include static const char *errstr; static long sys_ppoll(const kernel_ulong_t ufds, const kernel_ulong_t nfds, const kernel_ulong_t tsp, const kernel_ulong_t sigmask, const kernel_ulong_t sigsetsize) { long rc = syscall(__NR_ppoll, ufds, nfds, tsp, sigmask, sigsetsize); errstr = sprintrc(rc); return rc; } int main(void) { static const kernel_ulong_t bogus_nfds = (kernel_ulong_t) 0xdeadbeeffacefeedULL; static const kernel_ulong_t bogus_sigsetsize = (kernel_ulong_t) 0xdeadbeefbadc0dedULL; static const char *const POLLWRNORM_str = (POLLWRNORM == POLLOUT) ? "" : "|POLLWRNORM"; static const char *const USR2_CHLD_str = (SIGUSR2 < SIGCHLD) ? "USR2 CHLD" : "CHLD USR2"; void *const efault = tail_alloc(1024) + 1024; TAIL_ALLOC_OBJECT_CONST_PTR(struct timespec, ts); const unsigned int sigset_size = get_sigset_size(); void *const sigmask = tail_alloc(sigset_size); struct pollfd *fds; sigset_t mask; int pipe_fd[4]; long rc; sys_ppoll(0, bogus_nfds, 0, 0, bogus_sigsetsize); if (ENOSYS == errno) perror_msg_and_skip("ppoll"); printf("ppoll(NULL, %u, NULL, NULL, %llu) = %s\n", (unsigned) bogus_nfds, (unsigned long long) bogus_sigsetsize, errstr); sys_ppoll((unsigned long) efault, 42, (unsigned long) efault + 8, (unsigned long) efault + 16, sigset_size); printf("ppoll(%p, %u, %p, %p, %u) = %s\n", efault, 42, efault + 8, efault + 16, sigset_size, errstr); ts->tv_sec = 0xdeadbeefU; ts->tv_nsec = 0xfacefeedU; sys_ppoll(0, 0, (unsigned long) ts, 0, sigset_size); printf("ppoll(NULL, 0, {tv_sec=%lld, tv_nsec=%llu}, NULL, %u) = %s\n", (long long) ts->tv_sec, zero_extend_signed_to_ull(ts->tv_nsec), sigset_size, errstr); ts->tv_sec = (time_t) 0xcafef00ddeadbeefLL; ts->tv_nsec = (long) 0xbadc0dedfacefeedL; sys_ppoll(0, 0, (unsigned long) ts, 0, sigset_size); printf("ppoll(NULL, 0, {tv_sec=%lld, tv_nsec=%llu}, NULL, %u) = %s\n", (long long) ts->tv_sec, zero_extend_signed_to_ull(ts->tv_nsec), sigset_size, errstr); if (pipe(pipe_fd) || pipe(pipe_fd + 2)) perror_msg_and_fail("pipe"); ts->tv_sec = 42; ts->tv_nsec = 999999999; const struct pollfd fds1[] = { { .fd = pipe_fd[0], .events = POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND }, { .fd = pipe_fd[1], .events = POLLOUT | POLLWRNORM | POLLWRBAND }, { .fd = pipe_fd[2], .events = POLLIN | POLLPRI }, { .fd = pipe_fd[3], .events = POLLOUT } }; fds = efault - sizeof(fds1); memcpy(fds, fds1, sizeof(fds1)); sigemptyset(&mask); sigaddset(&mask, SIGUSR2); sigaddset(&mask, SIGCHLD); memcpy(sigmask, &mask, sigset_size); rc = sys_ppoll((unsigned long) fds, F8ILL_KULONG_MASK | ARRAY_SIZE(fds1), (unsigned long) ts, (unsigned long) sigmask, sigset_size); if (rc != 2) perror_msg_and_fail("ppoll 1"); printf("ppoll([{fd=%d, events=POLLIN|POLLPRI|POLLRDNORM|POLLRDBAND}" ", {fd=%d, events=POLLOUT%s|POLLWRBAND}" #if VERBOSE ", {fd=%d, events=POLLIN|POLLPRI}, {fd=%d, events=POLLOUT}]" #else ", ...]" #endif ", %u, {tv_sec=42, tv_nsec=999999999}, [%s], %u) = %ld" " ([{fd=%d, revents=POLLOUT%s}, {fd=%d, revents=POLLOUT}]" ", left {tv_sec=%u, tv_nsec=%u})\n", pipe_fd[0], pipe_fd[1], POLLWRNORM_str, #if VERBOSE pipe_fd[2], pipe_fd[3], #endif (unsigned int) ARRAY_SIZE(fds1), USR2_CHLD_str, (unsigned int) sigset_size, rc, pipe_fd[1], POLLWRNORM_str, pipe_fd[3], (unsigned int) ts->tv_sec, (unsigned int) ts->tv_nsec); ts->tv_sec = 0; ts->tv_nsec = 999; const struct pollfd fds2[] = { { .fd = pipe_fd[1], .events = POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND }, { .fd = pipe_fd[0], .events = POLLOUT | POLLWRNORM | POLLWRBAND } }; fds = efault - sizeof(fds2); memcpy(fds, fds2, sizeof(fds2)); memset(&mask, -1, sizeof(mask)); sigdelset(&mask, SIGHUP); sigdelset(&mask, SIGKILL); sigdelset(&mask, SIGSTOP); memcpy(sigmask, &mask, sigset_size); rc = sys_ppoll((unsigned long) fds, F8ILL_KULONG_MASK | ARRAY_SIZE(fds2), (unsigned long) ts, (unsigned long) sigmask, sigset_size); if (rc != 0) perror_msg_and_fail("ppoll 2"); printf("ppoll([{fd=%d, events=POLLIN|POLLPRI|POLLRDNORM|POLLRDBAND}" ", {fd=%d, events=POLLOUT%s|POLLWRBAND}], %u" ", {tv_sec=0, tv_nsec=999}, ~[HUP KILL STOP], %u)" " = %ld (Timeout)\n", pipe_fd[1], pipe_fd[0], POLLWRNORM_str, (unsigned) ARRAY_SIZE(fds2), sigset_size, rc); if (F8ILL_KULONG_SUPPORTED) { sys_ppoll(f8ill_ptr_to_kulong(fds), ARRAY_SIZE(fds2), f8ill_ptr_to_kulong(ts), f8ill_ptr_to_kulong(sigmask), sigset_size); printf("ppoll(%#llx, %u, %#llx, %#llx, %u) = %s\n", (unsigned long long) f8ill_ptr_to_kulong(fds), (unsigned) ARRAY_SIZE(fds2), (unsigned long long) f8ill_ptr_to_kulong(ts), (unsigned long long) f8ill_ptr_to_kulong(sigmask), (unsigned) sigset_size, errstr); } puts("+++ exited with 0 +++"); return 0; } #else SKIP_MAIN_UNDEFINED("__NR_ppoll") #endif