powerpc/ptrace/ptrace-vsx.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * Ptrace test for VMX/VSX registers
0004  *
0005  * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
0006  */
0007 #include "ptrace.h"
0008 #include "ptrace-vsx.h"
0009
0010 /* Tracer and Tracee Shared Data */
0011 int shm_id;
0012 int *cptr, *pptr;
0013
0014 unsigned long fp_load[VEC_MAX];
0015 unsigned long fp_load_new[VEC_MAX];
0016 unsigned long fp_store[VEC_MAX];
0017
0018 void vsx(void)
0019 {
0020     int ret;
0021
0022     cptr = (int *)shmat(shm_id, NULL, 0);
0023     loadvsx(fp_load, 0);
0024     cptr[1] = 1;
0025
0026     while (!cptr[0])
0027         asm volatile("" : : : "memory");
0028     shmdt((void *) cptr);
0029
0030     storevsx(fp_store, 0);
0031     ret = compare_vsx_vmx(fp_store, fp_load_new);
0032     if (ret)
0033         exit(1);
0034     exit(0);
0035 }
0036
0037 int trace_vsx(pid_t child)
0038 {
0039     unsigned long vsx[VSX_MAX];
0040     unsigned long vmx[VMX_MAX + 2][2];
0041
0042     FAIL_IF(start_trace(child));
0043     FAIL_IF(show_vsx(child, vsx));
0044     FAIL_IF(validate_vsx(vsx, fp_load));
0045     FAIL_IF(show_vmx(child, vmx));
0046     FAIL_IF(validate_vmx(vmx, fp_load));
0047
0048     memset(vsx, 0, sizeof(vsx));
0049     memset(vmx, 0, sizeof(vmx));
0050     load_vsx_vmx(fp_load_new, vsx, vmx);
0051
0052     FAIL_IF(write_vsx(child, vsx));
0053     FAIL_IF(write_vmx(child, vmx));
0054     FAIL_IF(stop_trace(child));
0055
0056     return TEST_PASS;
0057 }
0058
0059 int ptrace_vsx(void)
0060 {
0061     pid_t pid;
0062     int ret, status, i;
0063
0064     SKIP_IF(!have_hwcap(PPC_FEATURE_HAS_VSX));
0065
0066     shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
0067
0068     for (i = 0; i < VEC_MAX; i++)
0069         fp_load[i] = i + rand();
0070
0071     for (i = 0; i < VEC_MAX; i++)
0072         fp_load_new[i] = i + 2 * rand();
0073
0074     pid = fork();
0075     if (pid < 0) {
0076         perror("fork() failed");
0077         return TEST_FAIL;
0078     }
0079
0080     if (pid == 0)
0081         vsx();
0082
0083     if (pid) {
0084         pptr = (int *)shmat(shm_id, NULL, 0);
0085         while (!pptr[1])
0086             asm volatile("" : : : "memory");
0087
0088         ret = trace_vsx(pid);
0089         if (ret) {
0090             kill(pid, SIGTERM);
0091             shmdt((void *)pptr);
0092             shmctl(shm_id, IPC_RMID, NULL);
0093             return TEST_FAIL;
0094         }
0095
0096         pptr[0] = 1;
0097         shmdt((void *)pptr);
0098
0099         ret = wait(&status);
0100         shmctl(shm_id, IPC_RMID, NULL);
0101         if (ret != pid) {
0102             printf("Child's exit status not captured\n");
0103             return TEST_FAIL;
0104         }
0105
0106         return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
0107             TEST_PASS;
0108     }
0109     return TEST_PASS;
0110 }
0111
0112 int main(int argc, char *argv[])
0113 {
0114     return test_harness(ptrace_vsx, "ptrace_vsx");
0115 }