1// SPDX-License-Identifier: GPL-2.0-only
2#include <limits.h>
3#include <stdio.h>
4#include <stdlib.h>
5#include <string.h>
6#include <unistd.h>
7#include <linux/compiler.h>
8
9#include "debug.h"
10#include "tests.h"
11
12#ifdef HAVE_JITDUMP
13#include <libelf.h>
14#include "../util/genelf.h"
15#endif
16
17#define TEMPL "/tmp/perf-test-XXXXXX"
18
19static int test__jit_write_elf(struct test_suite *test __maybe_unused,
20 int subtest __maybe_unused)
21{
22#ifdef HAVE_JITDUMP
23 static unsigned char x86_code[] = {
24 0xBB, 0x2A, 0x00, 0x00, 0x00, /* movl $42, %ebx */
25 0xB8, 0x01, 0x00, 0x00, 0x00, /* movl $1, %eax */
26 0xCD, 0x80 /* int $0x80 */
27 };
28 char path[PATH_MAX];
29 int fd, ret;
30
31 strcpy(path, TEMPL);
32
33 fd = mkstemp(path);
34 if (fd < 0) {
35 perror("mkstemp failed");
36 return TEST_FAIL;
37 }
38
39 pr_info("Writing jit code to: %s\n", path);
40
41 ret = jit_write_elf(fd, 0, "main", x86_code, sizeof(x86_code),
42 NULL, 0, NULL, 0, 0);
43 close(fd);
44
45 unlink(path);
46
47 return ret ? TEST_FAIL : 0;
48#else
49 return TEST_SKIP;
50#endif
51}
52
53DEFINE_SUITE("Test jit_write_elf", jit_write_elf);
54

source code of linux/tools/perf/tests/genelf.c