Dmitry V. Levin
b93d52fe3d
strace is now provided under the terms of the GNU Lesser General Public License version 2.1 or later, see COPYING for more details. strace test suite is now provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details.
116 lines
2.8 KiB
C
116 lines
2.8 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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* Copyright (c) 2015-2018 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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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/ipc_private.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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printxval(ipc_private, (unsigned int) tcp->u_arg[0], NULL);
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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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