LXR linux/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 */
  15int shm_id;
  16int *cptr, *pptr;
  17
  18unsigned long fp_load[VEC_MAX];
  19unsigned long fp_load_new[VEC_MAX];
  20unsigned long fp_store[VEC_MAX];
  21
  22void 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
  41int 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
  63int 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
 114int main(int argc, char *argv[])
 115{
 116        return test_harness(ptrace_vsx, "ptrace_vsx");
 117}
 118