1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/* Copyright (C) 2000-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* This file must be compiled as PIE to avoid copy relocation when
accessing protected symbols defined in shared libaries since copy
relocation doesn't work with protected symbols and linker in
binutils 2.26 enforces this rule. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "vismod.h"
/* Prototype for our test function. */
extern int do_test (void);
/* This defines the `main' function and some more. */
#include <support/test-driver.c>
/* Prototypes for local functions. */
extern int protlocal (void);
const char *protvarlocal = __FILE__;
extern const char *protvarinmod;
extern const char *protvaritcpt;
int
do_test (void)
{
int res = 0;
int val;
/* First test: check whether .protected is handled correctly by the
assembler/linker. The uses of `protlocal' in the DSOs and in the
main program should all be resolved with the local definitions. */
val = protlocal () + calllocal1 () + calllocal2 ();
if (val != 0x155)
{
puts ("\
The handling of `.protected' seems to be implemented incorrectly: giving up");
abort ();
}
puts ("`.protected' seems to be handled correctly, good!");
/* Function pointers: for functions which are marked local and for
which definitions are available all function pointers must be
distinct. */
if (protlocal == getlocal1 ())
{
puts ("`protlocal' in main and mod1 have same address");
res = 1;
}
if (protlocal == getlocal2 ())
{
puts ("`protlocal' in main and mod2 have same address");
res = 1;
}
if (getlocal1 () == getlocal2 ())
{
puts ("`protlocal' in mod1 and mod2 have same address");
res = 1;
}
if (getlocal1 () () + getlocal2 () () != 0x44)
{
puts ("pointers to `protlocal' in mod1 or mod2 incorrect");
res = 1;
}
/* Next test. This is similar to the last one but the function we
are calling is not defined in the main object. This means that
the invocation in the main object uses the definition in the
first DSO. */
if (protinmod != getinmod1 ())
{
printf ("&protinmod in main (%p) != &protinmod in mod1 (%p)\n",
protinmod, getinmod1 ());
res = 1;
}
if (protinmod == getinmod2 ())
{
puts ("`protinmod' in main and mod2 have same address");
res = 1;
}
if (getinmod1 () == getinmod2 ())
{
puts ("`protinmod' in mod1 and mod2 have same address");
res = 1;
}
if (protinmod () + getinmod1 () () + getinmod2 () () != 0x4800)
{
puts ("pointers to `protinmod' in mod1 or mod2 incorrect");
res = 1;
}
val = protinmod () + callinmod1 () + callinmod2 ();
if (val != 0x15800)
{
printf ("calling of `protinmod' leads to wrong result (%#x)\n", val);
res = 1;
}
/* A very similar text. Same setup for the main object and the modules
but this time we have another definition in a preloaded module. This
one intercepts the references from the main object. */
if (protitcpt != getitcpt3 ())
{
printf ("&protitcpt in main (%p) != &protitcpt in mod3 (%p)\n",
&protitcpt, getitcpt3 ());
res = 1;
}
if (protitcpt == getitcpt1 ())
{
puts ("`protitcpt' in main and mod1 have same address");
res = 1;
}
if (protitcpt == getitcpt2 ())
{
puts ("`protitcpt' in main and mod2 have same address");
res = 1;
}
if (getitcpt1 () == getitcpt2 ())
{
puts ("`protitcpt' in mod1 and mod2 have same address");
res = 1;
}
val = protitcpt () + getitcpt1 () () + getitcpt2 () () + getitcpt3 () ();
if (val != 0x8440000)
{
printf ("\
pointers to `protitcpt' in mod1 or mod2 or mod3 incorrect (%#x)\n", val);
res = 1;
}
val = protitcpt () + callitcpt1 () + callitcpt2 () + callitcpt3 ();
if (val != 0x19540000)
{
printf ("calling of `protitcpt' leads to wrong result (%#x)\n", val);
res = 1;
}
/* Now look at variables. First a variable which is available
everywhere. We must have three different addresses. */
if (&protvarlocal == getvarlocal1 ())
{
puts ("`protvarlocal' in main and mod1 have same address");
res = 1;
}
if (&protvarlocal == getvarlocal2 ())
{
puts ("`protvarlocal' in main and mod2 have same address");
res = 1;
}
if (getvarlocal1 () == getvarlocal2 ())
{
puts ("`protvarlocal' in mod1 and mod2 have same address");
res = 1;
}
if (strcmp (protvarlocal, __FILE__) != 0)
{
puts ("`protvarlocal in main has wrong value");
res = 1;
}
if (strcmp (*getvarlocal1 (), "vismod1.c") != 0)
{
puts ("`getvarlocal1' returns wrong value");
res = 1;
}
if (strcmp (*getvarlocal2 (), "vismod2.c") != 0)
{
puts ("`getvarlocal2' returns wrong value");
res = 1;
}
/* Now the case where there is no local definition. */
if (&protvarinmod != getvarinmod1 ())
{
printf ("&protvarinmod in main (%p) != &protitcpt in mod1 (%p)\n",
&protvarinmod, getvarinmod1 ());
// XXX Possibly enable once fixed.
// res = 1;
}
if (&protvarinmod == getvarinmod2 ())
{
puts ("`protvarinmod' in main and mod2 have same address");
res = 1;
}
if (strcmp (*getvarinmod1 (), "vismod1.c") != 0)
{
puts ("`getvarinmod1' returns wrong value");
res = 1;
}
if (strcmp (*getvarinmod2 (), "vismod2.c") != 0)
{
puts ("`getvarinmod2' returns wrong value");
res = 1;
}
/* And a test where a variable definition is intercepted. */
if (&protvaritcpt == getvaritcpt1 ())
{
puts ("`protvaritcpt' in main and mod1 have same address");
res = 1;
}
if (&protvaritcpt == getvaritcpt2 ())
{
puts ("`protvaritcpt' in main and mod2 have same address");
res = 1;
}
if (&protvaritcpt != getvaritcpt3 ())
{
printf ("&protvaritcpt in main (%p) != &protvaritcpt in mod3 (%p)\n",
&protvaritcpt, getvaritcpt3 ());
// XXX Possibly enable once fixed.
// res = 1;
}
if (getvaritcpt1 () == getvaritcpt2 ())
{
puts ("`protvaritcpt' in mod1 and mod2 have same address");
res = 1;
}
if (strcmp (protvaritcpt, "vismod3.c") != 0)
{
puts ("`protvaritcpt in main has wrong value");
res = 1;
}
if (strcmp (*getvaritcpt1 (), "vismod1.c") != 0)
{
puts ("`getvaritcpt1' returns wrong value");
res = 1;
}
if (strcmp (*getvaritcpt2 (), "vismod2.c") != 0)
{
puts ("`getvaritcpt2' returns wrong value");
res = 1;
}
return res;
}
int
protlocal (void)
{
return 0x1;
}
|
