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

   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 */
  11int shm_id;
  12int *cptr, *pptr;
  13
  14unsigned long fp_load[VEC_MAX];
  15unsigned long fp_load_new[VEC_MAX];
  16unsigned long fp_store[VEC_MAX];
  17
  18void 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
  37int 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
  59int ptrace_vsx(void)
  60{
  61        pid_t pid;
  62        int ret, status, i;
  63
  64        SKIP_IF(!have_hwcap(PPC_FEATURE_HAS_VSX));
  65
  66        shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
  67
  68        for (i = 0; i < VEC_MAX; i++)
  69                fp_load[i] = i + rand();
  70
  71        for (i = 0; i < VEC_MAX; i++)
  72                fp_load_new[i] = i + 2 * rand();
  73
  74        pid = fork();
  75        if (pid < 0) {
  76                perror("fork() failed");
  77                return TEST_FAIL;
  78        }
  79
  80        if (pid == 0)
  81                vsx();
  82
  83        if (pid) {
  84                pptr = (int *)shmat(shm_id, NULL, 0);
  85                while (!pptr[1])
  86                        asm volatile("" : : : "memory");
  87
  88                ret = trace_vsx(pid);
  89                if (ret) {
  90                        kill(pid, SIGTERM);
  91                        shmdt((void *)pptr);
  92                        shmctl(shm_id, IPC_RMID, NULL);
  93                        return TEST_FAIL;
  94                }
  95
  96                pptr[0] = 1;
  97                shmdt((void *)pptr);
  98
  99                ret = wait(&status);
 100                shmctl(shm_id, IPC_RMID, NULL);
 101                if (ret != pid) {
 102                        printf("Child's exit status not captured\n");
 103                        return TEST_FAIL;
 104                }
 105
 106                return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
 107                        TEST_PASS;
 108        }
 109        return TEST_PASS;
 110}
 111
 112int main(int argc, char *argv[])
 113{
 114        return test_harness(ptrace_vsx, "ptrace_vsx");
 115}
 116