1/*- 2 * Copyright (c) 2014 Justin Hibbits 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD$"); 30 31#include "opt_compat.h" 32 33#include <sys/param.h> 34#include <sys/systm.h> 35#include <sys/malloc.h> 36#include <sys/proc.h> 37#include <sys/ptrace.h> 38#include <sys/sysent.h> 39#include <machine/altivec.h> 40#include <machine/cpu.h> 41#include <machine/md_var.h> 42#include <machine/pcb.h> 43 44int 45cpu_ptrace(struct thread *td, int req, void *addr, int data) 46{ 47 int error; 48 struct pcb *pcb; 49 struct vec vec; 50 51 pcb = td->td_pcb; 52 53 bzero(&vec, sizeof(vec)); 54 55 error = EINVAL; 56 switch (req) { 57 case PT_GETVRREGS: 58 if (!(cpu_features & PPC_FEATURE_HAS_ALTIVEC)) 59 break; 60 61 if (pcb->pcb_flags & PCB_VEC) { 62 save_vec_nodrop(td); 63 memcpy(&vec, &pcb->pcb_vec, sizeof(vec)); 64 } 65 error = copyout(&vec, addr, sizeof(vec)); 66 break; 67 case PT_SETVRREGS: 68 if (!(cpu_features & PPC_FEATURE_HAS_ALTIVEC)) 69 break; 70 error = copyin(addr, &vec, sizeof(vec)); 71 if (error == 0) { 72 pcb->pcb_flags |= PCB_VEC; 73 memcpy(&pcb->pcb_vec, &vec, sizeof(vec)); 74 } 75 break; 76 77 default: 78 break; 79 } 80 81 return (error); 82} 83