blob: 17e3207d34ae7e74779964a44d62c8763d44a087 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
// SPDX-License-Identifier: GPL-2.0-only
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <link.h>
#include <stdio.h>
#include <stdlib.h>
#include "../kselftest.h"
struct Statistics {
unsigned long long load_address;
unsigned long long alignment;
};
int ExtractStatistics(struct dl_phdr_info *info, size_t size, void *data)
{
struct Statistics *stats = (struct Statistics *) data;
int i;
if (info->dlpi_name != NULL && info->dlpi_name[0] != '\0') {
// Ignore headers from other than the executable.
return 2;
}
stats->load_address = (unsigned long long) info->dlpi_addr;
stats->alignment = 0;
for (i = 0; i < info->dlpi_phnum; i++) {
if (info->dlpi_phdr[i].p_type != PT_LOAD)
continue;
if (info->dlpi_phdr[i].p_align > stats->alignment)
stats->alignment = info->dlpi_phdr[i].p_align;
}
return 1; // Terminate dl_iterate_phdr.
}
int main(int argc, char **argv)
{
struct Statistics extracted;
unsigned long long misalign;
int ret;
ksft_print_header();
ksft_set_plan(1);
ret = dl_iterate_phdr(ExtractStatistics, &extracted);
if (ret != 1)
ksft_exit_fail_msg("FAILED: dl_iterate_phdr\n");
if (extracted.alignment == 0)
ksft_exit_fail_msg("FAILED: No alignment found\n");
else if (extracted.alignment & (extracted.alignment - 1))
ksft_exit_fail_msg("FAILED: Alignment is not a power of 2\n");
misalign = extracted.load_address & (extracted.alignment - 1);
if (misalign)
ksft_exit_fail_msg("FAILED: alignment = %llu, load_address = %llu\n",
extracted.alignment, extracted.load_address);
ksft_test_result_pass("Completed\n");
ksft_finished();
}
|
