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 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 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 87 int main(int argc, char *argv[]) 88 { 89 return test_harness(test_vmx_syscall, "vmx_syscall"); 90 91 } 92
