1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Ptrace test for VMX/VSX registers
4 *
5 * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
6 */
7 #include "ptrace.h"
8 #include "ptrace-vsx.h"
9
10 /* Tracer and Tracee Shared Data */
11 int shm_id;
12 int *cptr, *pptr;
13
14 unsigned long fp_load[VEC_MAX];
15 unsigned long fp_load_new[VEC_MAX];
16 unsigned long fp_store[VEC_MAX];
17
18 void vsx(void)
19 {
20 int ret;
21
22 cptr = (int *)shmat(shm_id, NULL, 0);
23 loadvsx(fp_load, 0);
24 cptr[1] = 1;
25
26 while (!cptr[0])
27 asm volatile("" : : : "memory");
28 shmdt((void *) cptr);
29
30 storevsx(fp_store, 0);
31 ret = compare_vsx_vmx(fp_store, fp_load_new);
32 if (ret)
33 exit(1);
34 exit(0);
35 }
36
37 int trace_vsx(pid_t child)
38 {
39 unsigned long vsx[VSX_MAX];
40 unsigned long vmx[VMX_MAX + 2][2];
41
42 FAIL_IF(start_trace(child));
43 FAIL_IF(show_vsx(child, vsx));
44 FAIL_IF(validate_vsx(vsx, fp_load));
45 FAIL_IF(show_vmx(child, vmx));
46 FAIL_IF(validate_vmx(vmx, fp_load));
47
48 memset(vsx, 0, sizeof(vsx));
49 memset(vmx, 0, sizeof(vmx));
50 load_vsx_vmx(fp_load_new, vsx, vmx);
51
52 FAIL_IF(write_vsx(child, vsx));
53 FAIL_IF(write_vmx(child, vmx));
54 FAIL_IF(stop_trace(child));
55
56 return TEST_PASS;
57 }
58
59 int ptrace_vsx(void)
60 {
61 pid_t pid;
62 int ret, status, i;
63
64 SKIP_IF_MSG(!have_hwcap(PPC_FEATURE_HAS_VSX), "Don't have VSX");
65
66 shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
67
68 for (i = 0; i < VEC_MAX; i++)
69 fp_load[i] = i + rand();
70
71 for (i = 0; i < VEC_MAX; i++)
72 fp_load_new[i] = i + 2 * rand();
73
74 pid = fork();
75 if (pid < 0) {
76 perror("fork() failed");
77 return TEST_FAIL;
78 }
79
80 if (pid == 0)
81 vsx();
82
83 if (pid) {
84 pptr = (int *)shmat(shm_id, NULL, 0);
85 while (!pptr[1])
86 asm volatile("" : : : "memory");
87
88 ret = trace_vsx(pid);
89 if (ret) {
90 kill(pid, SIGTERM);
91 shmdt((void *)pptr);
92 shmctl(shm_id, IPC_RMID, NULL);
93 return TEST_FAIL;
94 }
95
96 pptr[0] = 1;
97 shmdt((void *)pptr);
98
99 ret = wait(&status);
100 shmctl(shm_id, IPC_RMID, NULL);
101 if (ret != pid) {
102 printf("Child's exit status not captured\n");
103 return TEST_FAIL;
104 }
105
106 return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
107 TEST_PASS;
108 }
109 return TEST_PASS;
110 }
111
112 int main(int argc, char *argv[])
113 {
114 return test_harness(ptrace_vsx, "ptrace_vsx");
115 }
116
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