Dmitry V. Levin
3dfed0ef4e
* ipc_shm.c (SYS_FUNC(shmat)): Fetch current_wordsize bytes of data to obtain return code of indirect shmat subcall.
93 lines
3.0 KiB
C
93 lines
3.0 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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#ifdef HAVE_SYS_SHM_H
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# include <sys/shm.h>
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#elif defined HAVE_LINUX_SHM_H
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# include <linux/shm.h>
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#endif
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#include "xlat/shm_resource_flags.h"
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#include "xlat/shm_flags.h"
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SYS_FUNC(shmget)
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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(shm_resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
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tprints("|");
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print_numeric_umode_t(tcp->u_arg[2] & 0777);
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return RVAL_DECODED;
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}
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SYS_FUNC(shmat)
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{
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if (entering(tcp)) {
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tprintf("%lu, ", tcp->u_arg[0]);
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if (indirect_ipccall(tcp)) {
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printaddr(tcp->u_arg[3]);
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tprints(", ");
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printflags(shm_flags, tcp->u_arg[1], "SHM_???");
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} else {
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printaddr(tcp->u_arg[1]);
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tprints(", ");
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printflags(shm_flags, tcp->u_arg[2], "SHM_???");
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}
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return 0;
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} else {
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if (syserror(tcp))
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return 0;
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if (indirect_ipccall(tcp)) {
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union {
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uint64_t r64;
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uint32_t r32;
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} u;
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if (umoven(tcp, tcp->u_arg[2], current_wordsize, &u) < 0)
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return RVAL_NONE;
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tcp->u_rval = (sizeof(u.r32) == current_wordsize)
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? u.r32 : u.r64;
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}
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return RVAL_HEX;
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}
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}
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SYS_FUNC(shmdt)
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{
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printaddr(tcp->u_arg[indirect_ipccall(tcp) ? 3 : 0]);
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return RVAL_DECODED;
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}
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