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
