1 /*
2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 2002-2004 Roland McGrath <roland@redhat.com>
7 * Copyright (c) 2010 Andreas Schwab <schwab@linux-m68k.org>
8 * Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
9 * Copyright (c) 2014-2017 The strace developers.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include "defs.h"
36
37 #ifdef HAVE_STRUCT_USER_DESC
38
39 # include <asm/ldt.h>
40
41 void
print_user_desc(struct tcb * const tcp,const kernel_ulong_t addr)42 print_user_desc(struct tcb *const tcp, const kernel_ulong_t addr)
43 {
44 struct user_desc desc;
45
46 if (umove_or_printaddr(tcp, addr, &desc))
47 return;
48
49 tprintf("{entry_number:%d, "
50 "base_addr:%#08x, "
51 "limit:%d, "
52 "seg_32bit:%d, "
53 "contents:%d, "
54 "read_exec_only:%d, "
55 "limit_in_pages:%d, "
56 "seg_not_present:%d, "
57 "useable:%d}",
58 desc.entry_number,
59 desc.base_addr,
60 desc.limit,
61 desc.seg_32bit,
62 desc.contents,
63 desc.read_exec_only,
64 desc.limit_in_pages,
65 desc.seg_not_present,
66 desc.useable);
67 }
68
SYS_FUNC(modify_ldt)69 SYS_FUNC(modify_ldt)
70 {
71 tprintf("%" PRI_kld ", ", tcp->u_arg[0]);
72 if (tcp->u_arg[2] != sizeof(struct user_desc))
73 printaddr(tcp->u_arg[1]);
74 else
75 print_user_desc(tcp, tcp->u_arg[1]);
76 tprintf(", %" PRI_klu, tcp->u_arg[2]);
77
78 return RVAL_DECODED;
79 }
80
SYS_FUNC(set_thread_area)81 SYS_FUNC(set_thread_area)
82 {
83 if (entering(tcp)) {
84 print_user_desc(tcp, tcp->u_arg[0]);
85 } else {
86 struct user_desc desc;
87
88 if (!verbose(tcp) || syserror(tcp) ||
89 umove(tcp, tcp->u_arg[0], &desc) < 0) {
90 /* returned entry_number is not available */
91 } else {
92 static char outstr[32];
93
94 sprintf(outstr, "entry_number:%d", desc.entry_number);
95 tcp->auxstr = outstr;
96 return RVAL_STR;
97 }
98 }
99 return 0;
100 }
101
SYS_FUNC(get_thread_area)102 SYS_FUNC(get_thread_area)
103 {
104 if (exiting(tcp))
105 print_user_desc(tcp, tcp->u_arg[0]);
106 return 0;
107 }
108
109 #endif /* HAVE_STRUCT_USER_DESC */
110
111 #if defined(M68K) || defined(MIPS)
SYS_FUNC(set_thread_area)112 SYS_FUNC(set_thread_area)
113 {
114 printaddr(tcp->u_arg[0]);
115
116 return RVAL_DECODED;
117
118 }
119 #endif
120
121 #if defined(M68K)
SYS_FUNC(get_thread_area)122 SYS_FUNC(get_thread_area)
123 {
124 return RVAL_DECODED | RVAL_HEX;
125 }
126 #endif
127