1 /*
2 * libfdt - Flat Device Tree manipulation
3 * Test labels within values
4 * Copyright (C) 2008 David Gibson, IBM Corporation.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either version 2.1 of
9 * the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <stdlib.h>
22 #include <stdio.h>
23 #include <string.h>
24 #include <stdint.h>
25 #include <errno.h>
26
27 #include <dlfcn.h>
28
29 #include <libfdt.h>
30
31 #include "tests.h"
32 #include "testdata.h"
33
34 struct val_label {
35 const char *labelname;
36 int propoff;
37 };
38
39 static struct val_label labels1[] = {
40 { "start1", 0 },
41 { "mid1", 2 },
42 { "end1", -1 },
43 };
44
45 static struct val_label labels2[] = {
46 { "start2", 0 },
47 { "innerstart2", 0 },
48 { "innermid2", 4 },
49 { "innerend2", -1 },
50 { "end2", -1 },
51 };
52
53 static struct val_label labels3[] = {
54 { "start3", 0 },
55 { "innerstart3", 0 },
56 { "innermid3", 1 },
57 { "innerend3", -1 },
58 { "end3", -1 },
59 };
60
check_prop_labels(void * sohandle,void * fdt,const char * name,const struct val_label * labels,int n)61 static void check_prop_labels(void *sohandle, void *fdt, const char *name,
62 const struct val_label* labels, int n)
63 {
64 const struct fdt_property *prop;
65 const char *p;
66 int len;
67 int i;
68
69 prop = fdt_get_property(fdt, 0, name, &len);
70 if (!prop)
71 FAIL("Couldn't locate property \"%s\"", name);
72
73 p = dlsym(sohandle, name);
74 if (!p)
75 FAIL("Couldn't locate label symbol \"%s\"", name);
76
77 if (p != (const char *)prop)
78 FAIL("Label \"%s\" does not point to correct property", name);
79
80 for (i = 0; i < n; i++) {
81 int off = labels[i].propoff;
82
83 if (off == -1)
84 off = len;
85
86 p = dlsym(sohandle, labels[i].labelname);
87 if (!p)
88 FAIL("Couldn't locate label symbol \"%s\"", name);
89
90 if ((p - prop->data) != off)
91 FAIL("Label \"%s\" points to offset %ld instead of %d"
92 "in property \"%s\"", labels[i].labelname,
93 (long)(p - prop->data), off, name);
94 }
95 }
96
main(int argc,char * argv[])97 int main(int argc, char *argv[])
98 {
99 void *sohandle;
100 void *fdt;
101 int err;
102
103 test_init(argc, argv);
104 if (argc != 2)
105 CONFIG("Usage: %s <so file>", argv[0]);
106
107 sohandle = dlopen(argv[1], RTLD_NOW);
108 if (!sohandle)
109 FAIL("Couldn't dlopen() %s", argv[1]);
110
111 fdt = dlsym(sohandle, "dt_blob_start");
112 if (!fdt)
113 FAIL("Couldn't locate \"dt_blob_start\" symbol in %s",
114 argv[1]);
115
116 err = fdt_check_header(fdt);
117 if (err != 0)
118 FAIL("%s contains invalid tree: %s", argv[1],
119 fdt_strerror(err));
120
121
122 check_prop_labels(sohandle, fdt, "prop1", labels1, ARRAY_SIZE(labels1));
123 check_prop_labels(sohandle, fdt, "prop2", labels2, ARRAY_SIZE(labels2));
124 check_prop_labels(sohandle, fdt, "prop3", labels3, ARRAY_SIZE(labels3));
125
126 PASS();
127 }
128