/*-
 * Copyright (c) 2005 Doug Rabson
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/i386/i386/ptrace_machdep.c,v 1.3.2.1 2005/08/11 14:28:42 tobez Exp $");

#include "opt_cpu.h"
#include "opt_bss.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/ptrace.h>
#include <machine/md_var.h>
#include <machine/pcb.h>
#include <machine/specialreg.h>

#if !defined(CPU_DISABLE_SSE) && defined(I686_CPU)
#define CPU_ENABLE_SSE
#endif

int
cpu_ptrace(struct thread *td, int req, void *addr, int data)
{
	int error=0;
	struct ptrace_bss_addrs *bss_addrs;

/*      machine/ptrace.h:
        struct ptrace_bss_addrs {
           int from;
           int to;
        };

*/

#ifdef CPU_ENABLE_SSE
	if (!cpu_fxsr)
		return (EINVAL);
#endif


	switch (req) {
#ifdef CPU_ENABLE_SSE
	case PT_GETXMMREGS:
		error = copyout(&td->td_pcb->pcb_save.sv_xmm, addr,
		    sizeof(td->td_pcb->pcb_save.sv_xmm));
		break;

	case PT_SETXMMREGS:
		error = copyin(addr, &td->td_pcb->pcb_save.sv_xmm,
		    sizeof(td->td_pcb->pcb_save.sv_xmm));
		break;
#endif
#ifdef BRANCH_SINGLE_STEP	
	case PT_BSSTEP:
                error = 0;
		if( data != 0) {
		   td->td_pcb->pcb_flags|=PCB_BRANCH_SINGLE_STEP;
		} else {
		   td->td_pcb->pcb_flags&=~PCB_BRANCH_SINGLE_STEP;
		}
		break;
	case PT_LASTBRANCH:
	        bss_addrs = addr;
                error = copyout(&td->td_pcb->pcb_lastbranchfromip, &(bss_addrs->from), sizeof(td->td_pcb->pcb_lastbranchfromip));
                error = copyout(&td->td_pcb->pcb_lastbranchfromip, &(bss_addrs->to), sizeof(td->td_pcb->pcb_lastbranchtoip));
		break;
	case PT_LASTEXCEPTION:
	        bss_addrs = addr;
                error = copyout(&td->td_pcb->pcb_lastexceptionfromip, &(bss_addrs->from), sizeof(td->td_pcb->pcb_lastexceptionfromip));
                error = copyout(&td->td_pcb->pcb_lastexceptionfromip, &(bss_addrs->to), sizeof(td->td_pcb->pcb_lastexceptiontoip));
		break;
#endif
	default:
		return (EINVAL);
	}

	return (error);
}