Dmitry V. Levin
977aee82bf
* ipc_sem.c (print_sembuf): Explicitly cast struct sembuf.sem_flg to unsigned short to avoid potential sign-extension bug when printing invalid struct sembuf.sem_flg.
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*
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* Copyright (c) 1993 Ulrich Pegelow <pegelow@moorea.uni-muenster.de>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
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* Copyright (c) 2003-2006 Roland McGrath <roland@redhat.com>
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* Copyright (c) 2006-2015 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 "defs.h"
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#include "ipc_defs.h"
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#ifdef HAVE_SYS_SEM_H
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# include <sys/sem.h>
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#elif defined HAVE_LINUX_SEM_H
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# include <linux/sem.h>
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#endif
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#include "xlat/semctl_flags.h"
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#include "xlat/semop_flags.h"
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#if defined HAVE_SYS_SEM_H || defined HAVE_LINUX_SEM_H
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static bool
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print_sembuf(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
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{
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const struct sembuf *sb = elem_buf;
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tprintf("{%u, %d, ", sb->sem_num, sb->sem_op);
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printflags(semop_flags, (unsigned short) sb->sem_flg, "SEM_???");
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tprints("}");
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return true;
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}
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#endif
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static void
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tprint_sembuf_array(struct tcb *tcp, const long addr, const unsigned long count)
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{
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#if defined HAVE_SYS_SEM_H || defined HAVE_LINUX_SEM_H
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struct sembuf sb;
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print_array(tcp, addr, count, &sb, sizeof(sb),
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umoven_or_printaddr, print_sembuf, 0);
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#else
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printaddr(addr);
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#endif
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tprintf(", %lu", count);
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}
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SYS_FUNC(semop)
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{
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tprintf("%lu, ", tcp->u_arg[0]);
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if (indirect_ipccall(tcp)) {
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tprint_sembuf_array(tcp, tcp->u_arg[3], tcp->u_arg[1]);
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} else {
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tprint_sembuf_array(tcp, tcp->u_arg[1], tcp->u_arg[2]);
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}
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return RVAL_DECODED;
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}
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SYS_FUNC(semtimedop)
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{
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tprintf("%lu, ", tcp->u_arg[0]);
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if (indirect_ipccall(tcp)) {
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tprint_sembuf_array(tcp, tcp->u_arg[3], tcp->u_arg[1]);
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tprints(", ");
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#if defined(S390) || defined(S390X)
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print_timespec(tcp, tcp->u_arg[2]);
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#else
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print_timespec(tcp, tcp->u_arg[4]);
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#endif
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} else {
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tprint_sembuf_array(tcp, tcp->u_arg[1], tcp->u_arg[2]);
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tprints(", ");
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print_timespec(tcp, tcp->u_arg[3]);
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}
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return RVAL_DECODED;
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}
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SYS_FUNC(semget)
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{
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if (tcp->u_arg[0])
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tprintf("%#lx", tcp->u_arg[0]);
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else
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tprints("IPC_PRIVATE");
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tprintf(", %lu, ", tcp->u_arg[1]);
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if (printflags(resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
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tprints("|");
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tprintf("%#lo", tcp->u_arg[2] & 0777);
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return RVAL_DECODED;
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}
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SYS_FUNC(semctl)
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{
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tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
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PRINTCTL(semctl_flags, tcp->u_arg[2], "SEM_???");
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tprints(", ");
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if (indirect_ipccall(tcp)) {
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printnum_ptr(tcp, tcp->u_arg[3]);
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} else {
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tprintf("%#lx", tcp->u_arg[3]);
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}
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return RVAL_DECODED;
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}
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