1 /* $NetBSD: overlay_bad_fixup.c,v 1.1.1.2 2019/12/22 12:34:06 skrll Exp $ */
2
3 // SPDX-License-Identifier: LGPL-2.1-or-later
4 /*
5 * libfdt - Flat Device Tree manipulation
6 * Testcase for DT overlays()
7 * Copyright (C) 2016 Free Electrons
8 * Copyright (C) 2016 NextThing Co.
9 */
10
11 #include <stdio.h>
12
13 #include <libfdt.h>
14
15 #include "tests.h"
16
17 #define CHECK(code, expected) \
18 { \
19 err = (code); \
20 if (err != expected) \
21 FAIL(#code ": %s", fdt_strerror(err)); \
22 }
23
24 /* 4k ought to be enough for anybody */
25 #define FDT_COPY_SIZE (4 * 1024)
26
open_dt(char * path)27 static void *open_dt(char *path)
28 {
29 void *dt, *copy;
30 int err;
31
32 dt = load_blob(path);
33 copy = xmalloc(FDT_COPY_SIZE);
34
35 /*
36 * Resize our DTs to 4k so that we have room to operate on
37 */
38 CHECK(fdt_open_into(dt, copy, FDT_COPY_SIZE), 0);
39
40 return copy;
41 }
42
main(int argc,char * argv[])43 int main(int argc, char *argv[])
44 {
45 void *fdt_base, *fdt_overlay;
46 int err;
47
48 test_init(argc, argv);
49 if (argc != 3)
50 CONFIG("Usage: %s <base dtb> <overlay dtb>", argv[0]);
51
52 fdt_base = open_dt(argv[1]);
53 fdt_overlay = open_dt(argv[2]);
54
55 /* Apply the overlay */
56 CHECK(fdt_overlay_apply(fdt_base, fdt_overlay), -FDT_ERR_BADOVERLAY);
57
58 PASS();
59 }
60