1 /*
2 * Copyright 2015, Cyril Bur, IBM Corp.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * This test attempts to see if the VMX registers change across a syscall (fork).
10 */
11
12 #include <altivec.h>
13 #include <stdio.h>
14 #include <unistd.h>
15 #include <sys/syscall.h>
16 #include <sys/time.h>
17 #include <stdlib.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include "utils.h"
21
22 vector int varray[] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10,11,12},
23 {13,14,15,16},{17,18,19,20},{21,22,23,24},
24 {25,26,27,28},{29,30,31,32},{33,34,35,36},
25 {37,38,39,40},{41,42,43,44},{45,46,47,48}};
26
27 extern int test_vmx(vector int *varray, pid_t *pid);
28
vmx_syscall(void)29 int vmx_syscall(void)
30 {
31 pid_t fork_pid;
32 int i;
33 int ret;
34 int child_ret;
35 for (i = 0; i < 1000; i++) {
36 /* test_vmx will fork() */
37 ret = test_vmx(varray, &fork_pid);
38 if (fork_pid == -1)
39 return -1;
40 if (fork_pid == 0)
41 exit(ret);
42 waitpid(fork_pid, &child_ret, 0);
43 if (ret || child_ret)
44 return 1;
45 }
46
47 return 0;
48 }
49
test_vmx_syscall(void)50 int test_vmx_syscall(void)
51 {
52 /*
53 * Setup an environment with much context switching
54 */
55 pid_t pid2;
56 pid_t pid = fork();
57 int ret;
58 int child_ret;
59 FAIL_IF(pid == -1);
60
61 pid2 = fork();
62 ret = vmx_syscall();
63 /* Can't FAIL_IF(pid2 == -1); because we've already forked */
64 if (pid2 == -1) {
65 /*
66 * Couldn't fork, ensure child_ret is set and is a fail
67 */
68 ret = child_ret = 1;
69 } else {
70 if (pid2)
71 waitpid(pid2, &child_ret, 0);
72 else
73 exit(ret);
74 }
75
76 ret |= child_ret;
77
78 if (pid)
79 waitpid(pid, &child_ret, 0);
80 else
81 exit(ret);
82
83 FAIL_IF(ret || child_ret);
84 return 0;
85 }
86
main(int argc,char * argv[])87 int main(int argc, char *argv[])
88 {
89 return test_harness(test_vmx_syscall, "vmx_syscall");
90
91 }
92