1a3f27687e
Force clean FPU state in PCB user FPU save area for PT_I386_{GET,SET}XMMREGS.
Reported by: bde
MFC after: 1 week
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/*-
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* Copyright (c) 2005 Doug Rabson
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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_cpu.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/ptrace.h>
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#include <machine/md_var.h>
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#include <machine/pcb.h>
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#if !defined(CPU_DISABLE_SSE) && defined(I686_CPU)
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#define CPU_ENABLE_SSE
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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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#ifdef CPU_ENABLE_SSE
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struct savexmm *fpstate;
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int error;
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if (!cpu_fxsr)
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return (EINVAL);
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fpstate = &td->td_pcb->pcb_user_save.sv_xmm;
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switch (req) {
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case PT_GETXMMREGS:
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npxgetregs(td);
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error = copyout(fpstate, addr, sizeof(*fpstate));
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break;
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case PT_SETXMMREGS:
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npxgetregs(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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default:
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return (EINVAL);
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}
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return (error);
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#else
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return (EINVAL);
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#endif
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}
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