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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
* libfdt - Flat Device Tree manipulation
* Testcase for fdt_next_tag()
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <libfdt.h>
#include "tests.h"
#include "testdata.h"
#define FDT_SIZE 65536
#define CHECK_ERR(err) \
({ if (err) \
FAIL("%s: %d: %s", __FILE__, __LINE__, fdt_strerror(err)); \
})
static void fdt_next_tag_test(bool fdt_finished)
{
struct fdt_property *prp;
void *fdt;
int nextoff = 0, offset, err;
uint32_t tag;
fdt = malloc(FDT_SIZE);
if (!fdt)
FAIL("Can't allocate memory");
err = fdt_create(fdt, FDT_SIZE);
CHECK_ERR(err);
err = fdt_finish_reservemap(fdt);
CHECK_ERR(err);
/* Create a root node and add two properties */
err = fdt_begin_node(fdt, "");
CHECK_ERR(err);
err = fdt_property_u32(fdt, "prop-int-32", 0x1234);
CHECK_ERR(err);
err = fdt_property_u32(fdt, "prop2-int-32", 0x4321);
CHECK_ERR(err);
err = fdt_end_node(fdt);
CHECK_ERR(err);
if (fdt_finished) {
/* Call fdt_finish to set the correct fdt state. */
err = fdt_finish(fdt);
CHECK_ERR(err);
}
offset = fdt_first_property_offset(fdt, 0);
if (offset <= 0)
FAIL("Invalid offset %x, expected value greater than 0, finished=%d\n",
offset, fdt_finished);
/* Normal case */
tag = fdt_next_tag(fdt, offset, &nextoff);
if (tag != FDT_PROP)
FAIL("Invalid tag %x, expected FDT_PROP, finished=%d\n",
tag, fdt_finished);
if (nextoff <= 0)
FAIL("Invalid nextoff %d, expected value greater than 0, finished=%d",
nextoff, fdt_finished);
/* Get a writable ptr to the first property and corrupt the length */
prp = fdt_get_property_by_offset_w(fdt, offset, NULL);
if (!prp)
FAIL("Bad property pointer, finished=%d", fdt_finished);
/* int overflow case */
prp->len = cpu_to_fdt32(0xFFFFFFFA);
tag = fdt_next_tag(fdt, offset, &nextoff);
if (tag != FDT_END)
FAIL("Invalid tag %x, expected premature FDT_END, finished=%d",
tag, fdt_finished);
if (nextoff != -FDT_ERR_BADSTRUCTURE)
FAIL("Invalid nextoff, expected error -FDT_ERR_BADSTRUCTURE, finished=%d",
fdt_finished);
/* negative offset case */
prp->len = cpu_to_fdt32(0x7FFFFFFA);
tag = fdt_next_tag(fdt, offset, &nextoff);
if (tag != FDT_END)
FAIL("Invalid tag %x, expected premature FDT_END, finished=%d",
tag, fdt_finished);
if (nextoff != -FDT_ERR_BADSTRUCTURE)
FAIL("Invalid nextoff, expected -FDT_ERR_BADSTRUCTURE, finished=%d",
fdt_finished);
free(fdt);
}
int main(int argc, char *argv[])
{
test_init(argc, argv);
fdt_next_tag_test(false);
fdt_next_tag_test(true);
PASS();
}
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