139 lines
4.3 KiB
C
139 lines
4.3 KiB
C
/* $NetBSD: process_machdep.c,v 1.19 2000/05/30 01:30:00 nisimura Exp $ */
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/*
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* Copyright (c) 1994 Adam Glass
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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:
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* Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.19 2000/05/30 01:30:00 nisimura Exp $");
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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/proc.h>
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#include <sys/user.h>
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#include <sys/ptrace.h>
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#include <mips/reg.h>
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#include <mips/regnum.h> /* symbolic register indices */
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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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memcpy(regs, p->p_md.md_regs, sizeof(struct reg));
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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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memcpy(p->p_md.md_regs, regs, sizeof(struct reg));
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/*
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* XXX: is it safe to let users set system CP0 status reg?
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*/
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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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if ((p->p_md.md_flags & MDP_FPUSED) && p == fpcurproc)
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savefpregs(p);
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memcpy(regs, &p->p_addr->u_pcb.pcb_fpregs, sizeof(struct fpreg));
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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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/* to load FPA contents next time when FP insn is executed */
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if ((p->p_md.md_flags & MDP_FPUSED) && p == fpcurproc)
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fpcurproc = (struct proc *)0;
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memcpy(&p->p_addr->u_pcb.pcb_fpregs, regs, sizeof(struct fpreg));
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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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{
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/* XXX what are the correct semantics: sstep once, or forevermore? */
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if (sstep)
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mips_singlestep(p);
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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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((struct frame *)p->p_md.md_regs)->f_regs[PC] = (int)addr;
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return 0;
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}
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