9574a6e231
msgtyp has to be treated as a signed type all the way from fetching to printing. * ipc_msg.c (fetch_msgrcv_args): Sign extend msgtyp when fetching.
139 lines
4.2 KiB
C
139 lines
4.2 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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* Copyright (c) 2015-2017 The strace developers.
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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_MSG_H
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# include <sys/msg.h>
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#elif defined HAVE_LINUX_MSG_H
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# include <linux/msg.h>
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#endif
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#include "xlat/ipc_msg_flags.h"
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#include "xlat/resource_flags.h"
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SYS_FUNC(msgget)
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{
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const int key = (int) tcp->u_arg[0];
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if (key)
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tprintf("%#x", key);
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else
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tprints("IPC_PRIVATE");
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tprints(", ");
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if (printflags(resource_flags, tcp->u_arg[1] & ~0777, NULL) != 0)
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tprints("|");
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print_numeric_umode_t(tcp->u_arg[1] & 0777);
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return RVAL_DECODED;
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}
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static void
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tprint_msgsnd(struct tcb *const tcp, const kernel_ulong_t addr,
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const kernel_ulong_t count, const unsigned int flags)
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{
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tprint_msgbuf(tcp, addr, count);
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printflags(ipc_msg_flags, flags, "MSG_???");
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}
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SYS_FUNC(msgsnd)
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{
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tprintf("%d, ", (int) tcp->u_arg[0]);
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if (indirect_ipccall(tcp)) {
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tprint_msgsnd(tcp, tcp->u_arg[3], tcp->u_arg[1],
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tcp->u_arg[2]);
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} else {
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tprint_msgsnd(tcp, tcp->u_arg[1], tcp->u_arg[2],
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tcp->u_arg[3]);
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}
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return RVAL_DECODED;
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}
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static void
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tprint_msgrcv(struct tcb *const tcp, const kernel_ulong_t addr,
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const kernel_ulong_t count, const kernel_ulong_t msgtyp)
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{
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tprint_msgbuf(tcp, addr, count);
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tprintf("%" PRI_kld ", ", msgtyp);
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}
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static int
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fetch_msgrcv_args(struct tcb *const tcp, const kernel_ulong_t addr,
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kernel_ulong_t *const pair)
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{
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if (current_wordsize == sizeof(*pair)) {
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if (umoven_or_printaddr(tcp, addr, 2 * sizeof(*pair), pair))
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return -1;
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} else {
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unsigned int tmp[2];
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if (umove_or_printaddr(tcp, addr, &tmp))
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return -1;
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pair[0] = tmp[0];
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pair[1] = (int) tmp[1];
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}
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return 0;
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}
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SYS_FUNC(msgrcv)
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{
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if (entering(tcp)) {
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tprintf("%d, ", (int) tcp->u_arg[0]);
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} else {
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if (indirect_ipccall(tcp)) {
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const bool direct =
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#ifdef SPARC64
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current_wordsize == 8 ||
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#endif
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get_tcb_priv_ulong(tcp) != 0;
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if (direct) {
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tprint_msgrcv(tcp, tcp->u_arg[3],
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tcp->u_arg[1], tcp->u_arg[4]);
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} else {
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kernel_ulong_t pair[2];
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if (fetch_msgrcv_args(tcp, tcp->u_arg[3], pair))
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tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
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else
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tprint_msgrcv(tcp, pair[0],
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tcp->u_arg[1], pair[1]);
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}
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printflags(ipc_msg_flags, tcp->u_arg[2], "MSG_???");
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} else {
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tprint_msgrcv(tcp, tcp->u_arg[1],
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tcp->u_arg[2], tcp->u_arg[3]);
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printflags(ipc_msg_flags, tcp->u_arg[4], "MSG_???");
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}
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}
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return 0;
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}
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