116 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Ptrace test for VMX/VSX registers4 *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_MSG(!have_hwcap(PPC_FEATURE_HAS_VSX), "Don't have 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