tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c

   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 }