d079fb19f2
When msgrcv syscall is an ipc subcall, msgp (pointer to struct msgbuf) and msgtyp (message type) syscall arguments are passed via proxy structure which definition significantly depends on tracee's wordsize. * ipc_msg.c (fetch_msgrcv_args): New function. (sys_msgrcv): Use it.
122 lines
3.7 KiB
C
122 lines
3.7 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 <sys/ipc.h>
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#include <sys/msg.h>
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#include "xlat/ipc_msg_flags.h"
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#include "xlat/resource_flags.h"
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extern void tprint_msgbuf(struct tcb *tcp, const long addr, const unsigned long count);
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SYS_FUNC(msgget)
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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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if (printflags(resource_flags, tcp->u_arg[1] & ~0777, NULL) != 0)
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tprints("|");
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tprintf("%#lo", 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 *tcp, const long addr, const unsigned long count,
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const unsigned long 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 *tcp, const long addr, const unsigned long count,
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const long msgtyp)
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{
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tprint_msgbuf(tcp, addr, count);
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tprintf("%ld, ", msgtyp);
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}
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static int
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fetch_msgrcv_args(struct tcb *tcp, const long addr, long *pair)
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{
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if (current_wordsize == sizeof(long)) {
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if (umoven_or_printaddr(tcp, addr, 2 * sizeof(long), 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] = 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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long pair[2];
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if (fetch_msgrcv_args(tcp, tcp->u_arg[3], pair))
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tprintf(", %lu, ", tcp->u_arg[1]);
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else
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tprint_msgrcv(tcp, pair[0], tcp->u_arg[1], pair[1]);
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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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