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
19 static 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
53 DEFINE_SUITE("Test jit_write_elf", jit_write_elf);
54
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