231 lines
6.5 KiB
C
231 lines
6.5 KiB
C
/* $NetBSD: process_machdep.c,v 1.10 2000/09/26 22:05:50 eeh Exp $ */
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/*
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* Copyright (c) 1993 The Regents of the University of California.
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* Copyright (c) 1993 Jan-Simon Pendry
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* from: Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel
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*/
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/*
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* This file may seem a bit stylized, but that so that it's easier to port.
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* Functions to be implemented here are:
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*
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* process_read_regs(proc, regs)
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* Get the current user-visible register set from the process
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* and copy it into the regs structure (<machine/reg.h>).
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* The process is stopped at the time read_regs is called.
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*
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* process_write_regs(proc, regs)
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* Update the current register set from the passed in regs
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* structure. Take care to avoid clobbering special CPU
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* registers or privileged bits in the PSL.
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* The process is stopped at the time write_regs is called.
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*
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* process_sstep(proc)
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* Arrange for the process to trap after executing a single instruction.
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*
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* process_set_pc(proc)
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* Set the process's program counter.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/time.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/vnode.h>
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#include <machine/psl.h>
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#include <machine/reg.h>
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#include <machine/frame.h>
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#include <sys/ptrace.h>
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/* Unfortunately we need to convert v9 trapframe to v8 regs */
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int
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process_read_regs(p, regs)
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struct proc *p;
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struct reg *regs;
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{
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struct trapframe64* tf = p->p_md.md_tf;
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struct reg32* regp = (struct reg32*)regs;
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int i;
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#ifdef __arch64__
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if (!(curproc->p_flag & P_32)) {
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/* 64-bit mode -- copy out regs */
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regs->r_tstate = tf->tf_tstate;
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regs->r_pc = tf->tf_pc;
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regs->r_npc = tf->tf_npc;
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regs->r_y = tf->tf_y;
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for (i = 0; i < 8; i++) {
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regs->r_global[i] = tf->tf_global[i];
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regs->r_out[i] = tf->tf_out[i];
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}
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return (0);
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}
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#endif
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/* 32-bit mode -- copy out & convert 32-bit regs */
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regp->r_psr = TSTATECCR_TO_PSR(tf->tf_tstate);
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regp->r_pc = tf->tf_pc;
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regp->r_npc = tf->tf_npc;
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regp->r_y = tf->tf_y;
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for (i = 0; i < 8; i++) {
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regp->r_global[i] = tf->tf_global[i];
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regp->r_out[i] = tf->tf_out[i];
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}
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/* We should also write out the ins and locals. See signal stuff */
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return (0);
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}
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int
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process_write_regs(p, regs)
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struct proc *p;
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struct reg *regs;
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{
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struct trapframe64* tf = p->p_md.md_tf;
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struct reg32* regp = (struct reg32*)regs;
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int i;
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#ifdef __arch64__
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if (!(curproc->p_flag & P_32)) {
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/* 64-bit mode -- copy in regs */
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tf->tf_pc = regs->r_pc;
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tf->tf_npc = regs->r_npc;
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tf->tf_y = regs->r_y;
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for (i = 0; i < 8; i++) {
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tf->tf_global[i] = regs->r_global[i];
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tf->tf_out[i] = regs->r_out[i];
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}
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/* We should also read in the ins and locals. See signal stuff */
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tf->tf_tstate = (tf->tf_tstate & ~TSTATE_CCR) |
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(regs->r_tstate & TSTATE_CCR);
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return (0);
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}
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#endif
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/* 32-bit mode -- copy in & convert 32-bit regs */
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tf->tf_pc = regp->r_pc;
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tf->tf_npc = regp->r_npc;
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tf->tf_y = regp->r_y;
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for (i = 0; i < 8; i++) {
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tf->tf_global[i] = regp->r_global[i];
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tf->tf_out[i] = regp->r_out[i];
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}
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/* We should also read in the ins and locals. See signal stuff */
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tf->tf_tstate = (int64_t)(tf->tf_tstate & ~TSTATE_CCR) |
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PSRCC_TO_TSTATE(regp->r_psr);
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return (0);
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}
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int
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process_sstep(p, sstep)
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struct proc *p;
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int sstep;
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{
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if (sstep)
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return EINVAL;
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return (0);
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}
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int
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process_set_pc(p, addr)
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struct proc *p;
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caddr_t addr;
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{
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p->p_md.md_tf->tf_pc = (vaddr_t)addr;
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p->p_md.md_tf->tf_npc = (vaddr_t)addr + 4;
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return (0);
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}
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int
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process_read_fpregs(p, regs)
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struct proc *p;
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struct fpreg *regs;
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{
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extern struct fpstate64 initfpstate;
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struct fpstate64 *statep = &initfpstate;
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struct fpreg32 *regp = (struct fpreg32 *)regs;
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int i;
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if (!(curproc->p_flag & P_32)) {
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/* 64-bit mode -- copy in fregs */
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/* NOTE: struct fpreg == struct fpstate */
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if (p->p_md.md_fpstate)
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statep = p->p_md.md_fpstate;
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bcopy(statep, regs, sizeof(struct fpreg64));
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return 0;
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}
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/* 32-bit mode -- copy out & convert 32-bit fregs */
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if (p->p_md.md_fpstate)
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statep = p->p_md.md_fpstate;
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for (i=0; i<32; i++)
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regp->fr_regs[i] = statep->fs_regs[i];
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return 0;
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}
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int
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process_write_fpregs(p, regs)
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struct proc *p;
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struct fpreg *regs;
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{
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extern struct fpstate64 initfpstate;
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struct fpstate64 *statep = &initfpstate;
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struct fpreg32 *regp = (struct fpreg32 *)regs;
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int i;
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if (!(curproc->p_flag & P_32)) {
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/* 64-bit mode -- copy in fregs */
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if (p->p_md.md_fpstate == NULL)
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return EINVAL;
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/* NOTE: struct fpreg == struct fpstate */
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bcopy(regs, p->p_md.md_fpstate, sizeof(struct fpreg64));
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statep = p->p_md.md_fpstate;
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statep->fs_qsize = 0;
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return 0;
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}
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/* 32-bit mode -- copy in & convert 32-bit fregs */
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if (p->p_md.md_fpstate)
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statep = p->p_md.md_fpstate;
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for (i=0; i<32; i++)
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statep->fs_regs[i] = regp->fr_regs[i];
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statep->fs_fsr = regp->fr_fsr;
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statep->fs_qsize = 0;
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return 0;
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}
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