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  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  * 3. The name of the author may not be used to endorse or promote products
20  *    derived from this software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  */
33 
34 #include "defs.h"
35 
36 #if defined I386 || defined X86_64 || defined X32
37 
38 # include <asm/ldt.h>
39 
40 void
print_user_desc(struct tcb * tcp,const long addr)41 print_user_desc(struct tcb *tcp, const long addr)
42 {
43 	struct user_desc desc;
44 
45 	if (umove_or_printaddr(tcp, addr, &desc))
46 		return;
47 
48 	tprintf("{entry_number:%d, "
49 		"base_addr:%#08x, "
50 		"limit:%d, "
51 		"seg_32bit:%d, "
52 		"contents:%d, "
53 		"read_exec_only:%d, "
54 		"limit_in_pages:%d, "
55 		"seg_not_present:%d, "
56 		"useable:%d}",
57 		desc.entry_number,
58 		desc.base_addr,
59 		desc.limit,
60 		desc.seg_32bit,
61 		desc.contents,
62 		desc.read_exec_only,
63 		desc.limit_in_pages,
64 		desc.seg_not_present,
65 		desc.useable);
66 }
67 
SYS_FUNC(modify_ldt)68 SYS_FUNC(modify_ldt)
69 {
70 	tprintf("%ld, ", tcp->u_arg[0]);
71 	if (tcp->u_arg[2] != sizeof(struct user_desc))
72 		printaddr(tcp->u_arg[1]);
73 	else
74 		print_user_desc(tcp, tcp->u_arg[1]);
75 	tprintf(", %lu", tcp->u_arg[2]);
76 
77 	return RVAL_DECODED;
78 }
79 
SYS_FUNC(set_thread_area)80 SYS_FUNC(set_thread_area)
81 {
82 	if (entering(tcp)) {
83 		print_user_desc(tcp, tcp->u_arg[0]);
84 	} else {
85 		struct user_desc desc;
86 
87 		if (!verbose(tcp) || syserror(tcp) ||
88 		    umove(tcp, tcp->u_arg[0], &desc) < 0) {
89 			/* returned entry_number is not available */
90 		} else {
91 			static char outstr[32];
92 
93 			sprintf(outstr, "entry_number:%d", desc.entry_number);
94 			tcp->auxstr = outstr;
95 			return RVAL_STR;
96 		}
97 	}
98 	return 0;
99 }
100 
SYS_FUNC(get_thread_area)101 SYS_FUNC(get_thread_area)
102 {
103 	if (exiting(tcp))
104 		print_user_desc(tcp, tcp->u_arg[0]);
105 	return 0;
106 }
107 
108 #endif /* I386 || X86_64 || X32 */
109 
110 #if defined(M68K) || defined(MIPS)
SYS_FUNC(set_thread_area)111 SYS_FUNC(set_thread_area)
112 {
113 	printaddr(tcp->u_arg[0]);
114 
115 	return RVAL_DECODED;
116 
117 }
118 #endif
119 
120 #if defined(M68K)
SYS_FUNC(get_thread_area)121 SYS_FUNC(get_thread_area)
122 {
123 	return RVAL_DECODED | RVAL_HEX;
124 }
125 #endif
126