1 /*
2 * Ptrace test for VMX/VSX registers
3 *
4 * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11 #include "ptrace.h"
12 #include "ptrace-vsx.h"
13
14 /* Tracer and Tracee Shared Data */
15 int shm_id;
16 int *cptr, *pptr;
17
18 unsigned long fp_load[VEC_MAX];
19 unsigned long fp_load_new[VEC_MAX];
20 unsigned long fp_store[VEC_MAX];
21
22 void vsx(void)
23 {
24 int ret;
25
26 cptr = (int *)shmat(shm_id, NULL, 0);
27 loadvsx(fp_load, 0);
28 cptr[1] = 1;
29
30 while (!cptr[0])
31 asm volatile("" : : : "memory");
32 shmdt((void *) cptr);
33
34 storevsx(fp_store, 0);
35 ret = compare_vsx_vmx(fp_store, fp_load_new);
36 if (ret)
37 exit(1);
38 exit(0);
39 }
40
41 int trace_vsx(pid_t child)
42 {
43 unsigned long vsx[VSX_MAX];
44 unsigned long vmx[VMX_MAX + 2][2];
45
46 FAIL_IF(start_trace(child));
47 FAIL_IF(show_vsx(child, vsx));
48 FAIL_IF(validate_vsx(vsx, fp_load));
49 FAIL_IF(show_vmx(child, vmx));
50 FAIL_IF(validate_vmx(vmx, fp_load));
51
52 memset(vsx, 0, sizeof(vsx));
53 memset(vmx, 0, sizeof(vmx));
54 load_vsx_vmx(fp_load_new, vsx, vmx);
55
56 FAIL_IF(write_vsx(child, vsx));
57 FAIL_IF(write_vmx(child, vmx));
58 FAIL_IF(stop_trace(child));
59
60 return TEST_PASS;
61 }
62
63 int ptrace_vsx(void)
64 {
65 pid_t pid;
66 int ret, status, i;
67
68 shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
69
70 for (i = 0; i < VEC_MAX; i++)
71 fp_load[i] = i + rand();
72
73 for (i = 0; i < VEC_MAX; i++)
74 fp_load_new[i] = i + 2 * rand();
75
76 pid = fork();
77 if (pid < 0) {
78 perror("fork() failed");
79 return TEST_FAIL;
80 }
81
82 if (pid == 0)
83 vsx();
84
85 if (pid) {
86 pptr = (int *)shmat(shm_id, NULL, 0);
87 while (!pptr[1])
88 asm volatile("" : : : "memory");
89
90 ret = trace_vsx(pid);
91 if (ret) {
92 kill(pid, SIGTERM);
93 shmdt((void *)pptr);
94 shmctl(shm_id, IPC_RMID, NULL);
95 return TEST_FAIL;
96 }
97
98 pptr[0] = 1;
99 shmdt((void *)pptr);
100
101 ret = wait(&status);
102 shmctl(shm_id, IPC_RMID, NULL);
103 if (ret != pid) {
104 printf("Child's exit status not captured\n");
105 return TEST_FAIL;
106 }
107
108 return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
109 TEST_PASS;
110 }
111 return TEST_PASS;
112 }
113
114 int main(int argc, char *argv[])
115 {
116 return test_harness(ptrace_vsx, "ptrace_vsx");
117 }
118
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.