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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
* libfdt - Flat Device Tree manipulation
* Testcase for fdt_check_header
* Copyright (C) 2018 David Gibson
*/
#include <stdio.h>
#include <libfdt.h>
#include "tests.h"
static void *dtdup(void *dt)
{
size_t bufsize = fdt_totalsize(dt);
void *buf = xmalloc(bufsize);
fdt_move(dt, buf, bufsize);
return buf;
}
#define CHECK_MANGLE(exerr, code) \
do { \
void *fdt = dtdup(template); \
{ code } \
err = fdt_check_header(fdt); \
verbose_printf("\"%s\" => %s\n", #code, fdt_strerror(err)); \
if (err != (exerr)) \
FAIL("fdt_check_header() didn't catch mangle %s", \
#code); \
free(fdt); \
} while (0)
int main(int argc, char *argv[])
{
void *template;
int err;
test_init(argc, argv);
template = load_blob(argv[1]);
/* Check that the base dt is valid before mangling it */
err = fdt_check_header(template);
if (err != 0)
FAIL("Base tree fails: %s", fdt_strerror(err));
/* Check a no-op mangle doesn't break things */
CHECK_MANGLE(0, ; );
/* Mess up the magic number */
CHECK_MANGLE(-FDT_ERR_BADMAGIC,
fdt_set_magic(fdt, fdt_magic(fdt) ^ 0x1);
);
CHECK_MANGLE(-FDT_ERR_BADMAGIC,
fdt_set_magic(fdt, fdt_magic(fdt) ^ 0x80000000);
);
/* Mess up the version */
CHECK_MANGLE(-FDT_ERR_BADVERSION,
fdt_set_version(fdt, FDT_FIRST_SUPPORTED_VERSION - 1);
fdt_set_last_comp_version(fdt, FDT_FIRST_SUPPORTED_VERSION - 1);
);
CHECK_MANGLE(-FDT_ERR_BADVERSION,
fdt_set_version(fdt, FDT_LAST_SUPPORTED_VERSION + 1);
fdt_set_last_comp_version(fdt, FDT_LAST_SUPPORTED_VERSION + 1);
);
CHECK_MANGLE(-FDT_ERR_BADVERSION,
fdt_set_version(fdt, FDT_FIRST_SUPPORTED_VERSION);
fdt_set_last_comp_version(fdt, FDT_LAST_SUPPORTED_VERSION);
);
/* Out of bounds sizes */
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_totalsize(fdt, FDT_V1_SIZE - 1);
);
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_totalsize(fdt, (uint32_t)INT_MAX + 1);
);
/* Truncate within various blocks */
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_totalsize(fdt, fdt_off_dt_struct(fdt) - 1);
);
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_totalsize(fdt, fdt_off_dt_strings(fdt) - 1);
);
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_totalsize(fdt, fdt_off_mem_rsvmap(fdt) - 1);
);
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_totalsize(fdt, fdt_off_dt_struct(fdt) + 1);
);
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_totalsize(fdt, fdt_off_dt_strings(fdt) + 1);
);
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_totalsize(fdt, fdt_off_mem_rsvmap(fdt) + 1);
);
/* Negative block sizes */
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_size_dt_struct(fdt, (uint32_t)-1);
);
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_size_dt_strings(fdt, (uint32_t)-1);
);
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_size_dt_struct(fdt, (uint32_t)INT_MIN);
);
CHECK_MANGLE(-FDT_ERR_TRUNCATED,
fdt_set_size_dt_strings(fdt, (uint32_t)INT_MIN);
);
PASS();
}
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