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 shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT); 65 66 for (i = 0; i < VEC_MAX; i++) 67 fp_load[i] = i + rand(); 68 69 for (i = 0; i < VEC_MAX; i++) 70 fp_load_new[i] = i + 2 * rand(); 71 72 pid = fork(); 73 if (pid < 0) { 74 perror("fork() failed"); 75 return TEST_FAIL; 76 } 77 78 if (pid == 0) 79 vsx(); 80 81 if (pid) { 82 pptr = (int *)shmat(shm_id, NULL, 0); 83 while (!pptr[1]) 84 asm volatile("" : : : "memory"); 85 86 ret = trace_vsx(pid); 87 if (ret) { 88 kill(pid, SIGTERM); 89 shmdt((void *)pptr); 90 shmctl(shm_id, IPC_RMID, NULL); 91 return TEST_FAIL; 92 } 93 94 pptr[0] = 1; 95 shmdt((void *)pptr); 96 97 ret = wait(&status); 98 shmctl(shm_id, IPC_RMID, NULL); 99 if (ret != pid) { 100 printf("Child's exit status not captured\n"); 101 return TEST_FAIL; 102 } 103 104 return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL : 105 TEST_PASS; 106 } 107 return TEST_PASS; 108 } 109 110 int main(int argc, char *argv[]) 111 { 112 return test_harness(ptrace_vsx, "ptrace_vsx"); 113 } 114