/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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("$FreeBSD$");
#include "opt_cpu.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/ptrace.h>
#include <machine/frame.h>
#include <machine/md_var.h>
#include <machine/pcb.h>
static int
cpu_ptrace_xstate(struct thread *td, int req, void *addr, int data)
{
struct ptrace_xstate_info info;
char *savefpu;
int error;
if (!use_xsave)
return (EOPNOTSUPP);
switch (req) {
case PT_GETXSTATE_OLD:
npxgetregs(td);
savefpu = (char *)(get_pcb_user_save_td(td) + 1);
error = copyout(savefpu, addr,
cpu_max_ext_state_size - sizeof(union savefpu));
break;
case PT_SETXSTATE_OLD:
if (data > cpu_max_ext_state_size - sizeof(union savefpu)) {
error = EINVAL;
break;
}
savefpu = malloc(data, M_TEMP, M_WAITOK);
error = copyin(addr, savefpu, data);
if (error == 0) {
npxgetregs(td);
error = npxsetxstate(td, savefpu, data);
}
free(savefpu, M_TEMP);
break;
case PT_GETXSTATE_INFO:
if (data != sizeof(info)) {
error = EINVAL;
break;
}
info.xsave_len = cpu_max_ext_state_size;
info.xsave_mask = xsave_mask;
error = copyout(&info, addr, data);
break;
case PT_GETXSTATE:
npxgetregs(td);
savefpu = (char *)(get_pcb_user_save_td(td));
error = copyout(savefpu, addr, cpu_max_ext_state_size);
break;
case PT_SETXSTATE:
if (data < sizeof(union savefpu) ||
data > cpu_max_ext_state_size) {
error = EINVAL;
break;
}
savefpu = malloc(data, M_TEMP, M_WAITOK);
error = copyin(addr, savefpu, data);
if (error == 0)
error = npxsetregs(td, (union savefpu *)savefpu,
savefpu + sizeof(union savefpu), data -
sizeof(union savefpu));
free(savefpu, M_TEMP);
break;
default:
error = EINVAL;
break;
}
return (error);
}
static int
cpu_ptrace_xmm(struct thread *td, int req, void *addr, int data)
{
struct savexmm *fpstate;
int error;
if (!cpu_fxsr)
return (EINVAL);
fpstate = &get_pcb_user_save_td(td)->sv_xmm;
switch (req) {
case PT_GETXMMREGS:
npxgetregs(td);
error = copyout(fpstate, addr, sizeof(*fpstate));
break;
case PT_SETXMMREGS:
npxgetregs(td);
error = copyin(addr, fpstate, sizeof(*fpstate));
fpstate->sv_env.en_mxcsr &= cpu_mxcsr_mask;
break;
case PT_GETXSTATE_OLD:
case PT_SETXSTATE_OLD:
case PT_GETXSTATE_INFO:
case PT_GETXSTATE:
case PT_SETXSTATE:
error = cpu_ptrace_xstate(td, req, addr, data);
break;
default:
return (EINVAL);
}
return (error);
}
int
cpu_ptrace(struct thread *td, int req, void *addr, int data)
{
struct segment_descriptor *sdp, sd;
register_t r;
int error;
switch (req) {
case PT_GETXMMREGS:
case PT_SETXMMREGS:
case PT_GETXSTATE_OLD:
case PT_SETXSTATE_OLD:
case PT_GETXSTATE_INFO:
case PT_GETXSTATE:
case PT_SETXSTATE:
error = cpu_ptrace_xmm(td, req, addr, data);
break;
case PT_GETFSBASE:
case PT_GETGSBASE:
sdp = req == PT_GETFSBASE ? &td->td_pcb->pcb_fsd :
&td->td_pcb->pcb_gsd;
r = sdp->sd_hibase << 24 | sdp->sd_lobase;
error = copyout(&r, addr, sizeof(r));
break;
case PT_SETFSBASE:
case PT_SETGSBASE:
error = copyin(addr, &r, sizeof(r));
if (error != 0)
break;
fill_based_sd(&sd, r);
if (req == PT_SETFSBASE) {
td->td_pcb->pcb_fsd = sd;
td->td_frame->tf_fs = GSEL(GUFS_SEL, SEL_UPL);
} else {
td->td_pcb->pcb_gsd = sd;
td->td_pcb->pcb_gs = GSEL(GUGS_SEL, SEL_UPL);
}
break;
default:
return (EINVAL);
}
return (error);
}
