127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/*
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* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993-1996 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) 2002-2004 Roland McGrath <roland@redhat.com>
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* Copyright (c) 2010 Andreas Schwab <schwab@linux-m68k.org>
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* Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2014-2017 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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#ifdef HAVE_STRUCT_USER_DESC
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# include <asm/ldt.h>
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void
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print_user_desc(struct tcb *const tcp, const kernel_ulong_t addr)
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{
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struct user_desc desc;
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if (umove_or_printaddr(tcp, addr, &desc))
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return;
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tprintf("{entry_number:%d, "
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"base_addr:%#08x, "
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"limit:%d, "
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"seg_32bit:%d, "
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"contents:%d, "
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"read_exec_only:%d, "
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"limit_in_pages:%d, "
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"seg_not_present:%d, "
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"useable:%d}",
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desc.entry_number,
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desc.base_addr,
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desc.limit,
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desc.seg_32bit,
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desc.contents,
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desc.read_exec_only,
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desc.limit_in_pages,
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desc.seg_not_present,
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desc.useable);
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}
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SYS_FUNC(modify_ldt)
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{
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tprintf("%" PRI_kld ", ", tcp->u_arg[0]);
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if (tcp->u_arg[2] != sizeof(struct user_desc))
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printaddr(tcp->u_arg[1]);
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else
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print_user_desc(tcp, tcp->u_arg[1]);
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tprintf(", %" PRI_klu, tcp->u_arg[2]);
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return RVAL_DECODED;
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}
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SYS_FUNC(set_thread_area)
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{
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if (entering(tcp)) {
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print_user_desc(tcp, tcp->u_arg[0]);
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} else {
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struct user_desc desc;
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if (!verbose(tcp) || syserror(tcp) ||
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umove(tcp, tcp->u_arg[0], &desc) < 0) {
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/* returned entry_number is not available */
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} else {
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static char outstr[32];
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sprintf(outstr, "entry_number:%d", desc.entry_number);
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tcp->auxstr = outstr;
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return RVAL_STR;
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}
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}
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return 0;
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}
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SYS_FUNC(get_thread_area)
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{
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if (exiting(tcp))
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print_user_desc(tcp, tcp->u_arg[0]);
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return 0;
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}
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#endif /* HAVE_STRUCT_USER_DESC */
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#if defined(M68K) || defined(MIPS)
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SYS_FUNC(set_thread_area)
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{
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printaddr(tcp->u_arg[0]);
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return RVAL_DECODED;
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}
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#endif
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#if defined(M68K)
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SYS_FUNC(get_thread_area)
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{
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return RVAL_DECODED | RVAL_HEX;
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}
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#endif
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