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
|
/* Global-scope DSO mapping test with a static executable (BZ #15022).
Copyright (C) 2013-2016 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/>. */
#include <dlfcn.h>
#include <stddef.h>
#include <stdio.h>
#define MAGIC0 0
#define MAGIC1 0x5500ffaa
#define MAGIC2 0xaaff0055
/* Mapping a DSO into the global scope used to crash in static
executables. Check that it succeeds and then that symbols from
the DSO can be accessed and operate as expected. */
static int
do_test (void)
{
unsigned int (*getfoo) (void);
void (*setfoo) (unsigned int);
unsigned int *foop;
unsigned int foo;
void *handle;
/* Try to map a module into the global scope. */
handle = dlopen ("modstatic3.so", RTLD_LAZY | RTLD_GLOBAL);
if (handle == NULL)
{
printf ("dlopen (modstatic3.so): %s\n", dlerror ());
return 1;
}
/* Get at its symbols. */
foop = dlsym (handle, "foo");
if (foop == NULL)
{
printf ("dlsym (foo): %s\n", dlerror ());
return 1;
}
getfoo = dlsym (handle, "getfoo");
if (getfoo == NULL)
{
printf ("dlsym (getfoo): %s\n", dlerror ());
return 1;
}
setfoo = dlsym (handle, "setfoo");
if (setfoo == NULL)
{
printf ("dlsym (setfoo): %s\n", dlerror ());
return 1;
}
/* Make sure the view of the initial state is consistent. */
foo = *foop;
if (foo != MAGIC0)
{
printf ("*foop: got %#x, expected %#x\n", foo, MAGIC0);
return 1;
}
foo = getfoo ();
if (foo != MAGIC0)
{
printf ("getfoo: got %#x, expected %#x\n", foo, MAGIC0);
return 1;
}
/* Likewise with one change to its state. */
setfoo (MAGIC1);
foo = *foop;
if (foo != MAGIC1)
{
printf ("*foop: got %#x, expected %#x\n", foo, MAGIC1);
return 1;
}
foo = getfoo ();
if (foo != MAGIC1)
{
printf ("getfoo: got %#x, expected %#x\n", foo, MAGIC1);
return 1;
}
/* And with another. */
setfoo (MAGIC2);
foo = *foop;
if (foo != MAGIC2)
{
printf ("*foop: got %#x, expected %#x\n", foo, MAGIC2);
return 1;
}
foo = getfoo ();
if (foo != MAGIC2)
{
printf ("getfoo: got %#x, expected %#x\n", foo, MAGIC2);
return 1;
}
/* All done, clean up. */
getfoo = NULL;
setfoo = NULL;
foop = NULL;
dlclose (handle);
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
|
