1 /*- 2 * Copyright (c) 2005 Doug Rabson 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_cpu.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/proc.h> 36 #include <sys/ptrace.h> 37 #include <machine/md_var.h> 38 #include <machine/pcb.h> 39 40 #if !defined(CPU_DISABLE_SSE) && defined(I686_CPU) 41 #define CPU_ENABLE_SSE 42 #endif 43 44 int 45 cpu_ptrace(struct thread *td, int req, void *addr, int data) 46 { 47 #ifdef CPU_ENABLE_SSE 48 struct savexmm *fpstate; 49 int error; 50 51 if (!cpu_fxsr) 52 return (EINVAL); 53 54 fpstate = &td->td_pcb->pcb_user_save.sv_xmm; 55 switch (req) { 56 case PT_GETXMMREGS: 57 error = copyout(fpstate, addr, sizeof(*fpstate)); 58 break; 59 60 case PT_SETXMMREGS: 61 error = copyin(addr, fpstate, sizeof(*fpstate)); 62 fpstate->sv_env.en_mxcsr &= cpu_mxcsr_mask; 63 break; 64 65 default: 66 return (EINVAL); 67 } 68 69 return (error); 70 #else 71 return (EINVAL); 72 #endif 73 } 74