blob: cd79872bc4a94c4a290a85d921ce3801b7e4a922 [file] [log] [blame]
* libfdt - Flat Device Tree manipulation
* Testcase/tool for rearranging blocks of a dtb
* Copyright (C) 2006 David Gibson, IBM Corporation.
* This 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.
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <stdint.h>
#include <libfdt.h>
#include "tests.h"
#include "testdata.h"
static int nopulate_struct(char *buf, const char *fdt)
int offset, nextoffset = 0;
uint32_t tag;
char *p;
p = buf;
do {
offset = nextoffset;
tag = fdt_next_tag(fdt, offset, &nextoffset);
memcpy(p, (const char *)fdt + fdt_off_dt_struct(fdt) + offset,
nextoffset - offset);
p += nextoffset - offset;
*((uint32_t *)p) = cpu_to_fdt32(FDT_NOP);
} while (tag != FDT_END);
return p - buf;
int main(int argc, char *argv[])
char *fdt, *fdt2, *buf;
int newsize, struct_start, struct_end_old, struct_end_new, delta;
const char *inname;
char outname[PATH_MAX];
test_init(argc, argv);
if (argc != 2)
CONFIG("Usage: %s <dtb file>", argv[0]);
inname = argv[1];
fdt = load_blob(argv[1]);
sprintf(outname, "noppy.%s", inname);
if (fdt_version(fdt) < 17)
FAIL("Can't deal with version <17");
buf = xmalloc(2 * fdt_size_dt_struct(fdt));
newsize = nopulate_struct(buf, fdt);
verbose_printf("Nopulated structure block has new size %d\n", newsize);
/* Replace old strcutre block with the new */
fdt2 = xmalloc(fdt_totalsize(fdt) + newsize);
struct_start = fdt_off_dt_struct(fdt);
delta = newsize - fdt_size_dt_struct(fdt);
struct_end_old = struct_start + fdt_size_dt_struct(fdt);
struct_end_new = struct_start + newsize;
memcpy(fdt2, fdt, struct_start);
memcpy(fdt2 + struct_start, buf, newsize);
memcpy(fdt2 + struct_end_new, fdt + struct_end_old,
fdt_totalsize(fdt) - struct_end_old);
fdt_set_totalsize(fdt2, fdt_totalsize(fdt) + delta);
fdt_set_size_dt_struct(fdt2, newsize);
if (fdt_off_mem_rsvmap(fdt) > struct_start)
fdt_set_off_mem_rsvmap(fdt2, fdt_off_mem_rsvmap(fdt) + delta);
if (fdt_off_dt_strings(fdt) > struct_start)
fdt_set_off_dt_strings(fdt2, fdt_off_dt_strings(fdt) + delta);
save_blob(outname, fdt2);