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/*
* Copyright (c) 1993 Ulrich Pegelow <pegelow@moorea.uni-muenster.de>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 2003-2006 Roland McGrath <roland@redhat.com>
* Copyright (c) 2006-2015 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2015-2018 The strace developers.
* 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 "defs.h"
#include "ipc_defs.h"
#ifdef HAVE_SYS_MSG_H
# include <sys/msg.h>
#elif defined HAVE_LINUX_MSG_H
# include <linux/msg.h>
#endif
#include "xlat/ipc_msg_flags.h"
#include "xlat/ipc_private.h"
#include "xlat/resource_flags.h"
SYS_FUNC(msgget)
{
printxval(ipc_private, (unsigned int) tcp->u_arg[0], NULL);
tprints(", ");
if (printflags(resource_flags, tcp->u_arg[1] & ~0777, NULL) != 0)
tprints("|");
print_numeric_umode_t(tcp->u_arg[1] & 0777);
return RVAL_DECODED;
}
static void
tprint_msgsnd(struct tcb *const tcp, const kernel_ulong_t addr,
const kernel_ulong_t count, const unsigned int flags)
{
tprint_msgbuf(tcp, addr, count);
printflags(ipc_msg_flags, flags, "MSG_???");
}
SYS_FUNC(msgsnd)
{
tprintf("%d, ", (int) tcp->u_arg[0]);
if (indirect_ipccall(tcp)) {
tprint_msgsnd(tcp, tcp->u_arg[3], tcp->u_arg[1],
tcp->u_arg[2]);
} else {
tprint_msgsnd(tcp, tcp->u_arg[1], tcp->u_arg[2],
tcp->u_arg[3]);
}
return RVAL_DECODED;
}
static void
tprint_msgrcv(struct tcb *const tcp, const kernel_ulong_t addr,
const kernel_ulong_t count, const kernel_ulong_t msgtyp)
{
tprint_msgbuf(tcp, addr, count);
tprintf("%" PRI_kld ", ", msgtyp);
}
static int
fetch_msgrcv_args(struct tcb *const tcp, const kernel_ulong_t addr,
kernel_ulong_t *const pair)
{
if (current_wordsize == sizeof(*pair)) {
if (umoven_or_printaddr(tcp, addr, 2 * sizeof(*pair), pair))
return -1;
} else {
unsigned int tmp[2];
if (umove_or_printaddr(tcp, addr, &tmp))
return -1;
pair[0] = tmp[0];
pair[1] = (int) tmp[1];
}
return 0;
}
SYS_FUNC(msgrcv)
{
if (entering(tcp)) {
tprintf("%d, ", (int) tcp->u_arg[0]);
} else {
if (indirect_ipccall(tcp)) {
const bool direct =
#ifdef SPARC64
current_wordsize == 8 ||
#endif
get_tcb_priv_ulong(tcp) != 0;
if (direct) {
tprint_msgrcv(tcp, tcp->u_arg[3],
tcp->u_arg[1], tcp->u_arg[4]);
} else {
kernel_ulong_t pair[2];
if (fetch_msgrcv_args(tcp, tcp->u_arg[3], pair))
tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
else
tprint_msgrcv(tcp, pair[0],
tcp->u_arg[1], pair[1]);
}
printflags(ipc_msg_flags, tcp->u_arg[2], "MSG_???");
} else {
tprint_msgrcv(tcp, tcp->u_arg[1],
tcp->u_arg[2], tcp->u_arg[3]);
printflags(ipc_msg_flags, tcp->u_arg[4], "MSG_???");
}
}
return 0;
}
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