mirror of https://github.com/F-Stack/f-stack.git
248 lines
5.8 KiB
C
248 lines
5.8 KiB
C
/*-
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* Copyright (c) 2011 Konstantin Belousov <kib@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_compat.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/ptrace.h>
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#include <sys/sysent.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/md_var.h>
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#include <machine/pcb.h>
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#include <machine/frame.h>
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#include <machine/vmparam.h>
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static int
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cpu_ptrace_xstate(struct thread *td, int req, void *addr, int data)
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{
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struct ptrace_xstate_info info;
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char *savefpu;
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int error;
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if (!use_xsave)
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return (EOPNOTSUPP);
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switch (req) {
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case PT_GETXSTATE_OLD:
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fpugetregs(td);
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savefpu = (char *)(get_pcb_user_save_td(td) + 1);
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error = copyout(savefpu, addr,
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cpu_max_ext_state_size - sizeof(struct savefpu));
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break;
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case PT_SETXSTATE_OLD:
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if (data > cpu_max_ext_state_size - sizeof(struct savefpu)) {
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error = EINVAL;
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break;
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}
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savefpu = malloc(data, M_TEMP, M_WAITOK);
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error = copyin(addr, savefpu, data);
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if (error == 0) {
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fpugetregs(td);
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error = fpusetxstate(td, savefpu, data);
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}
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free(savefpu, M_TEMP);
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break;
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case PT_GETXSTATE_INFO:
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if (data != sizeof(info)) {
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error = EINVAL;
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break;
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}
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info.xsave_len = cpu_max_ext_state_size;
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info.xsave_mask = xsave_mask;
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error = copyout(&info, addr, data);
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break;
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case PT_GETXSTATE:
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fpugetregs(td);
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savefpu = (char *)(get_pcb_user_save_td(td));
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error = copyout(savefpu, addr, cpu_max_ext_state_size);
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break;
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case PT_SETXSTATE:
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if (data < sizeof(struct savefpu) ||
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data > cpu_max_ext_state_size) {
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error = EINVAL;
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break;
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}
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savefpu = malloc(data, M_TEMP, M_WAITOK);
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error = copyin(addr, savefpu, data);
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if (error == 0)
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error = fpusetregs(td, (struct savefpu *)savefpu,
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savefpu + sizeof(struct savefpu), data -
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sizeof(struct savefpu));
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free(savefpu, M_TEMP);
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break;
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default:
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error = EINVAL;
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break;
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}
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return (error);
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}
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static void
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cpu_ptrace_setbase(struct thread *td, int req, register_t r)
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{
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if (req == PT_SETFSBASE) {
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td->td_pcb->pcb_fsbase = r;
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td->td_frame->tf_fs = _ufssel;
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} else {
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td->td_pcb->pcb_gsbase = r;
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td->td_frame->tf_gs = _ugssel;
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}
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set_pcb_flags(td->td_pcb, PCB_FULL_IRET);
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}
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#ifdef COMPAT_FREEBSD32
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#define PT_I386_GETXMMREGS (PT_FIRSTMACH + 0)
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#define PT_I386_SETXMMREGS (PT_FIRSTMACH + 1)
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static int
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cpu32_ptrace(struct thread *td, int req, void *addr, int data)
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{
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struct savefpu *fpstate;
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uint32_t r;
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int error;
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switch (req) {
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case PT_I386_GETXMMREGS:
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fpugetregs(td);
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error = copyout(get_pcb_user_save_td(td), addr,
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sizeof(*fpstate));
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break;
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case PT_I386_SETXMMREGS:
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fpugetregs(td);
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fpstate = get_pcb_user_save_td(td);
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error = copyin(addr, fpstate, sizeof(*fpstate));
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fpstate->sv_env.en_mxcsr &= cpu_mxcsr_mask;
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break;
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case PT_GETXSTATE_OLD:
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case PT_SETXSTATE_OLD:
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case PT_GETXSTATE_INFO:
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case PT_GETXSTATE:
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case PT_SETXSTATE:
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error = cpu_ptrace_xstate(td, req, addr, data);
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break;
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case PT_GETFSBASE:
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case PT_GETGSBASE:
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if (!SV_PROC_FLAG(td->td_proc, SV_ILP32)) {
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error = EINVAL;
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break;
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}
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r = req == PT_GETFSBASE ? td->td_pcb->pcb_fsbase :
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td->td_pcb->pcb_gsbase;
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error = copyout(&r, addr, sizeof(r));
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break;
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case PT_SETFSBASE:
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case PT_SETGSBASE:
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if (!SV_PROC_FLAG(td->td_proc, SV_ILP32)) {
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error = EINVAL;
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break;
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}
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error = copyin(addr, &r, sizeof(r));
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if (error != 0)
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break;
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cpu_ptrace_setbase(td, req, r);
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break;
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default:
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error = EINVAL;
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break;
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}
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return (error);
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}
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#endif
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int
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cpu_ptrace(struct thread *td, int req, void *addr, int data)
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{
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register_t *r, rv;
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int error;
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#ifdef COMPAT_FREEBSD32
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if (SV_CURPROC_FLAG(SV_ILP32))
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return (cpu32_ptrace(td, req, addr, data));
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#endif
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/* Support old values of PT_GETXSTATE_OLD and PT_SETXSTATE_OLD. */
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if (req == PT_FIRSTMACH + 0)
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req = PT_GETXSTATE_OLD;
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if (req == PT_FIRSTMACH + 1)
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req = PT_SETXSTATE_OLD;
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switch (req) {
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case PT_GETXSTATE_OLD:
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case PT_SETXSTATE_OLD:
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case PT_GETXSTATE_INFO:
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case PT_GETXSTATE:
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case PT_SETXSTATE:
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error = cpu_ptrace_xstate(td, req, addr, data);
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break;
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case PT_GETFSBASE:
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case PT_GETGSBASE:
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r = req == PT_GETFSBASE ? &td->td_pcb->pcb_fsbase :
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&td->td_pcb->pcb_gsbase;
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error = copyout(r, addr, sizeof(*r));
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break;
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case PT_SETFSBASE:
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case PT_SETGSBASE:
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error = copyin(addr, &rv, sizeof(rv));
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if (error != 0)
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break;
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if (rv >= td->td_proc->p_sysent->sv_maxuser) {
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error = EINVAL;
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break;
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}
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cpu_ptrace_setbase(td, req, rv);
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break;
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default:
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error = EINVAL;
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break;
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}
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return (error);
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}
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