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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, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. The name of the author may not be used to endorse or promote products
17  *    derived from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  *
30  *	$Id$
31  */
32 #include "defs.h"
33 
34 #if defined(LINUX)
35 
36 #include <fcntl.h>
37 #include <sys/stat.h>
38 #include <sys/time.h>
39 #include <sys/wait.h>
40 #include <sys/resource.h>
41 #include <sys/utsname.h>
42 #ifndef HAVE_ANDROID_OS
43 #include <sys/user.h>
44 #endif
45 #include <sys/syscall.h>
46 #include <signal.h>
47 
48 /* Bits of module.flags.  */
49 
50 #define MOD_UNINITIALIZED	0
51 #define MOD_RUNNING		1
52 #define MOD_DELETED		2
53 #define MOD_AUTOCLEAN		4
54 #define MOD_VISITED  		8
55 #define MOD_USED_ONCE		16
56 #define MOD_JUST_FREED		32
57 #define MOD_INITIALIZING	64
58 
59 /* Values for query_module's which.  */
60 
61 #define QM_MODULES	1
62 #define QM_DEPS		2
63 #define QM_REFS		3
64 #define QM_SYMBOLS	4
65 #define QM_INFO		5
66 
67 struct module_symbol
68 {
69 	unsigned long value;
70 	const char *name;
71 };
72 
73 struct module_info
74 {
75 	unsigned long addr;
76 	unsigned long size;
77 	unsigned long flags;
78 	long usecount;
79 };
80 
81 static const struct xlat which[] = {
82 	{ 0,		"0"		},
83 	{ QM_MODULES,	"QM_MODULES"	},
84 	{ QM_DEPS,	"QM_DEPS"	},
85 	{ QM_REFS,	"QM_REFS"	},
86 	{ QM_SYMBOLS,	"QM_SYMBOLS"	},
87 	{ QM_INFO,	"QM_INFO"	},
88 	{ 0,		NULL		},
89 };
90 
91 static const struct xlat modflags[] = {
92 	{ MOD_UNINITIALIZED,	"MOD_UNINITIALIZED"	},
93 	{ MOD_RUNNING,		"MOD_RUNNING"		},
94 	{ MOD_DELETED,		"MOD_DELETED"		},
95 	{ MOD_AUTOCLEAN,	"MOD_AUTOCLEAN"		},
96 	{ MOD_VISITED,		"MOD_VISITED"		},
97 	{ MOD_USED_ONCE,	"MOD_USED_ONCE"		},
98 	{ MOD_JUST_FREED,	"MOD_JUST_FREED"	},
99 	{ 0,			NULL			},
100 };
101 
102 int
sys_query_module(struct tcb * tcp)103 sys_query_module(struct tcb *tcp)
104 {
105 	if (entering(tcp)) {
106 		printstr(tcp, tcp->u_arg[0], -1);
107 		tprintf(", ");
108 		printxval(which, tcp->u_arg[1], "QM_???");
109 		tprintf(", ");
110 	} else {
111 		size_t ret;
112 
113 		if (!verbose(tcp) || syserror(tcp) ||
114 		    umove(tcp, tcp->u_arg[4], &ret) < 0) {
115 			tprintf("%#lx, %lu, %#lx", tcp->u_arg[2],
116 				tcp->u_arg[3], tcp->u_arg[4]);
117 		} else if (tcp->u_arg[1]==QM_INFO) {
118 			struct module_info	mi;
119 			if (umove(tcp, tcp->u_arg[2], &mi) < 0) {
120 				tprintf("%#lx, ", tcp->u_arg[2]);
121 			} else {
122 				tprintf("{address=%#lx, size=%lu, flags=",
123 					mi.addr, mi.size);
124 				printflags(modflags, mi.flags, "MOD_???");
125 				tprintf(", usecount=%lu}, ", mi.usecount);
126 			}
127 			tprintf("%Zu", ret);
128 		} else if ((tcp->u_arg[1]==QM_MODULES) ||
129 			   (tcp->u_arg[1]==QM_DEPS) ||
130 			   (tcp->u_arg[1]==QM_REFS)) {
131 			tprintf("{");
132 			if (!abbrev(tcp)) {
133 				char*	data	= malloc(tcp->u_arg[3]);
134 				char*	mod	= data;
135 				size_t	idx;
136 
137 				if (!data) {
138 					fprintf(stderr, "out of memory\n");
139 					tprintf(" /* %Zu entries */ ", ret);
140 				} else {
141 					if (umoven(tcp, tcp->u_arg[2],
142 						tcp->u_arg[3], data) < 0) {
143 						tprintf(" /* %Zu entries */ ", ret);
144 					} else {
145 						for (idx=0; idx<ret; idx++) {
146 							tprintf("%s%s",
147 								(idx ? ", " : ""),
148 								mod);
149 							mod += strlen(mod)+1;
150 						}
151 					}
152 					free(data);
153 				}
154 			} else
155 				tprintf(" /* %Zu entries */ ", ret);
156 			tprintf("}, %Zu", ret);
157 		} else if (tcp->u_arg[1]==QM_SYMBOLS) {
158 			tprintf("{");
159 			if (!abbrev(tcp)) {
160 				char*			data	= malloc(tcp->u_arg[3]);
161 				struct module_symbol*	sym	= (struct module_symbol*)data;
162 				size_t			idx;
163 
164 				if (!data) {
165 					fprintf(stderr, "out of memory\n");
166 					tprintf(" /* %Zu entries */ ", ret);
167 				} else {
168 					if (umoven(tcp, tcp->u_arg[2],
169 						tcp->u_arg[3], data) < 0) {
170 						tprintf(" /* %Zu entries */ ", ret);
171 					} else {
172 						for (idx=0; idx<ret; idx++) {
173 							tprintf("%s{name=%s, value=%lu}",
174 								(idx ? " " : ""),
175 								data+(long)sym->name,
176 								sym->value);
177 							sym++;
178 						}
179 					}
180 					free(data);
181 				}
182 			} else
183 				tprintf(" /* %Zu entries */ ", ret);
184 			tprintf("}, %Zd", ret);
185 		} else {
186 			printstr(tcp, tcp->u_arg[2], tcp->u_arg[3]);
187 			tprintf(", %#lx", tcp->u_arg[4]);
188 		}
189 	}
190 	return 0;
191 }
192 
193 int
sys_create_module(tcp)194 sys_create_module(tcp)
195 struct tcb *tcp;
196 {
197 	if (entering(tcp)) {
198 		printpath(tcp, tcp->u_arg[0]);
199 		tprintf(", %lu", tcp->u_arg[1]);
200 	}
201 	return RVAL_HEX;
202 }
203 
204 int
sys_init_module(tcp)205 sys_init_module(tcp)
206 struct tcb *tcp;
207 {
208 	if (entering(tcp)) {
209 		tprintf("%#lx, ", tcp->u_arg[0]);
210 		tprintf("%lu, ", tcp->u_arg[1]);
211 		printstr(tcp, tcp->u_arg[2], -1);
212 	}
213 	return 0;
214 }
215 #endif /* LINUX */
216