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/*-
* Copyright (c) 2011 Konstantin Belousov <kib@FreeBSD.org>
* 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("$FreeBSD$");
#include "opt_compat.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/ptrace.h>
#include <sys/sysent.h>
#include <machine/md_var.h>
#include <machine/pcb.h>
static int
cpu_ptrace_xstate(struct thread *td, int req, void *addr, int data)
{
char *savefpu;
int error;
if (!use_xsave)
return (EOPNOTSUPP);
switch (req) {
case PT_GETXSTATE:
fpugetregs(td);
savefpu = (char *)(get_pcb_user_save_td(td) + 1);
error = copyout(savefpu, addr,
cpu_max_ext_state_size - sizeof(struct savefpu));
break;
case PT_SETXSTATE:
if (data > cpu_max_ext_state_size - sizeof(struct savefpu)) {
error = EINVAL;
break;
}
savefpu = malloc(data, M_TEMP, M_WAITOK);
error = copyin(addr, savefpu, data);
if (error == 0) {
fpugetregs(td);
error = fpusetxstate(td, savefpu, data);
}
free(savefpu, M_TEMP);
break;
default:
error = EINVAL;
break;
}
return (error);
}
#ifdef COMPAT_FREEBSD32
#define PT_I386_GETXMMREGS (PT_FIRSTMACH + 0)
#define PT_I386_SETXMMREGS (PT_FIRSTMACH + 1)
#define PT_I386_GETXSTATE (PT_FIRSTMACH + 2)
#define PT_I386_SETXSTATE (PT_FIRSTMACH + 3)
static int
cpu32_ptrace(struct thread *td, int req, void *addr, int data)
{
struct savefpu *fpstate;
int error;
switch (req) {
case PT_I386_GETXMMREGS:
fpugetregs(td);
error = copyout(get_pcb_user_save_td(td), addr,
sizeof(*fpstate));
break;
case PT_I386_SETXMMREGS:
fpugetregs(td);
fpstate = get_pcb_user_save_td(td);
error = copyin(addr, fpstate, sizeof(*fpstate));
fpstate->sv_env.en_mxcsr &= cpu_mxcsr_mask;
break;
case PT_I386_GETXSTATE:
error = cpu_ptrace_xstate(td, PT_GETXSTATE, addr, data);
break;
case PT_I386_SETXSTATE:
error = cpu_ptrace_xstate(td, PT_SETXSTATE, addr, data);
break;
default:
error = EINVAL;
break;
}
return (error);
}
#endif
int
cpu_ptrace(struct thread *td, int req, void *addr, int data)
{
int error;
#ifdef COMPAT_FREEBSD32
if (SV_CURPROC_FLAG(SV_ILP32))
return (cpu32_ptrace(td, req, addr, data));
#endif
/* Support old values of PT_GETXSTATE and PT_SETXSTATE. */
if (req == PT_FIRSTMACH + 0)
req = PT_GETXSTATE;
if (req == PT_FIRSTMACH + 1)
req = PT_SETXSTATE;
switch (req) {
case PT_GETXSTATE:
case PT_SETXSTATE:
error = cpu_ptrace_xstate(td, req, addr, data);
break;
default:
error = EINVAL;
break;
}
return (error);
}
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