1 // SPDX-License-Identifier: LGPL-2.1-or-later
2 /*
3 * libfdt - Flat Device Tree manipulation
4 * Testcase/tool for rearranging blocks of a dtb
5 * Copyright (C) 2006 David Gibson, IBM Corporation.
6 */
7
8 #include <stdlib.h>
9 #include <stdio.h>
10 #include <string.h>
11 #include <limits.h>
12 #include <stdint.h>
13
14 #include <libfdt.h>
15
16 #include "tests.h"
17 #include "testdata.h"
18
nopulate_struct(char * buf,const char * fdt)19 static int nopulate_struct(char *buf, const char *fdt)
20 {
21 int offset, nextoffset = 0;
22 uint32_t tag;
23 char *p;
24
25 p = buf;
26
27 do {
28 offset = nextoffset;
29 tag = fdt_next_tag(fdt, offset, &nextoffset);
30
31 memcpy(p, (const char *)fdt + fdt_off_dt_struct(fdt) + offset,
32 nextoffset - offset);
33 p += nextoffset - offset;
34
35 *((fdt32_t *)p) = cpu_to_fdt32(FDT_NOP);
36 p += FDT_TAGSIZE;
37
38 } while (tag != FDT_END);
39
40 return p - buf;
41 }
42
main(int argc,char * argv[])43 int main(int argc, char *argv[])
44 {
45 char *fdt, *fdt2, *buf;
46 int newsize, struct_start, struct_end_old, struct_end_new, delta;
47 const char *inname;
48 char outname[PATH_MAX];
49
50 test_init(argc, argv);
51 if (argc != 2)
52 CONFIG("Usage: %s <dtb file>", argv[0]);
53
54 inname = argv[1];
55 fdt = load_blob(argv[1]);
56 sprintf(outname, "noppy.%s", inname);
57
58 if (fdt_version(fdt) < 17)
59 FAIL("Can't deal with version <17");
60
61 buf = xmalloc(2 * fdt_size_dt_struct(fdt));
62
63 newsize = nopulate_struct(buf, fdt);
64
65 verbose_printf("Nopulated structure block has new size %d\n", newsize);
66
67 /* Replace old strcutre block with the new */
68
69 fdt2 = xmalloc(fdt_totalsize(fdt) + newsize);
70
71 struct_start = fdt_off_dt_struct(fdt);
72 delta = newsize - fdt_size_dt_struct(fdt);
73 struct_end_old = struct_start + fdt_size_dt_struct(fdt);
74 struct_end_new = struct_start + newsize;
75
76 memcpy(fdt2, fdt, struct_start);
77 memcpy(fdt2 + struct_start, buf, newsize);
78 memcpy(fdt2 + struct_end_new, fdt + struct_end_old,
79 fdt_totalsize(fdt) - struct_end_old);
80
81 fdt_set_totalsize(fdt2, fdt_totalsize(fdt) + delta);
82 fdt_set_size_dt_struct(fdt2, newsize);
83
84 if (fdt_off_mem_rsvmap(fdt) > struct_start)
85 fdt_set_off_mem_rsvmap(fdt2, fdt_off_mem_rsvmap(fdt) + delta);
86 if (fdt_off_dt_strings(fdt) > struct_start)
87 fdt_set_off_dt_strings(fdt2, fdt_off_dt_strings(fdt) + delta);
88
89 save_blob(outname, fdt2);
90
91 PASS();
92 }
93