1 // SPDX-License-Identifier: GPL-2.0
2 #define _GNU_SOURCE
3 #include "../kselftest_harness.h"
4 #include <stdio.h>
5 #include <string.h>
6 #include <errno.h>
7 #include <sys/wait.h>
8 #include <sys/syscall.h>
9 #include <sys/prctl.h>
10
11 #include "linux/ptrace.h"
12
13 static int sys_ptrace(int request, pid_t pid, void *addr, void *data)
14 {
15 return syscall(SYS_ptrace, request, pid, addr, data);
16 }
17
18 TEST(get_set_sud)
19 {
20 struct ptrace_sud_config config;
21 pid_t child;
22 int ret = 0;
23 int status;
24
25 child = fork();
26 ASSERT_GE(child, 0);
27 if (child == 0) {
28 ASSERT_EQ(0, sys_ptrace(PTRACE_TRACEME, 0, 0, 0)) {
29 TH_LOG("PTRACE_TRACEME: %m");
30 }
31 kill(getpid(), SIGSTOP);
32 _exit(1);
33 }
34
35 waitpid(child, &status, 0);
36
37 memset(&config, 0xff, sizeof(config));
38 config.mode = PR_SYS_DISPATCH_ON;
39
40 ret = sys_ptrace(PTRACE_GET_SYSCALL_USER_DISPATCH_CONFIG, child,
41 (void *)sizeof(config), &config);
42
43 ASSERT_EQ(ret, 0);
44 ASSERT_EQ(config.mode, PR_SYS_DISPATCH_OFF);
45 ASSERT_EQ(config.selector, 0);
46 ASSERT_EQ(config.offset, 0);
47 ASSERT_EQ(config.len, 0);
48
49 config.mode = PR_SYS_DISPATCH_ON;
50 config.selector = 0;
51 config.offset = 0x400000;
52 config.len = 0x1000;
53
54 ret = sys_ptrace(PTRACE_SET_SYSCALL_USER_DISPATCH_CONFIG, child,
55 (void *)sizeof(config), &config);
56
57 ASSERT_EQ(ret, 0);
58
59 memset(&config, 1, sizeof(config));
60 ret = sys_ptrace(PTRACE_GET_SYSCALL_USER_DISPATCH_CONFIG, child,
61 (void *)sizeof(config), &config);
62
63 ASSERT_EQ(ret, 0);
64 ASSERT_EQ(config.mode, PR_SYS_DISPATCH_ON);
65 ASSERT_EQ(config.selector, 0);
66 ASSERT_EQ(config.offset, 0x400000);
67 ASSERT_EQ(config.len, 0x1000);
68
69 kill(child, SIGKILL);
70 }
71
72 TEST_HARNESS_MAIN
73
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