/* $NetBSD: process_machdep.c,v 1.24 2007/03/04 05:59:10 christos Exp $ */ /* * Copyright (c) 1994 Christopher G. Demetriou * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Christopher G. Demetriou. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. */ /* * This file may seem a bit stylized, but that so that it's easier to port. * Functions to be implemented here are: * * process_read_regs(proc, regs) * Get the current user-visible register set from the process * and copy it into the regs structure (<machine/reg.h>). * The process is stopped at the time read_regs is called. * * process_write_regs(proc, regs) * Update the current register set from the passed in regs * structure. Take care to avoid clobbering special CPU * registers or privileged bits in the PSL. * The process is stopped at the time write_regs is called. * * process_sstep(proc) * Arrange for the process to trap after executing a single instruction. * * process_set_pc(proc) * Set the process's program counter. */ #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ __KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.24 2007/03/04 05:59:10 christos Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/proc.h> #include <sys/user.h> #include <sys/vnode.h> #include <sys/ptrace.h> #include <machine/cpu.h> #include <machine/reg.h> #include <machine/frame.h> #include <machine/alpha.h> #define lwp_frame(l) ((l)->l_md.md_tf) #define lwp_pcb(l) (&(l)->l_addr->u_pcb) #define lwp_fpframe(l) (&(lwp_pcb(l)->pcb_fp)) int process_read_regs(struct lwp *l, struct reg *regs) { frametoreg(lwp_frame(l), regs); regs->r_regs[R_ZERO] = lwp_frame(l)->tf_regs[FRAME_PC]; regs->r_regs[R_SP] = lwp_pcb(l)->pcb_hw.apcb_usp; return (0); } int process_write_regs(struct lwp *l, const struct reg *regs) { regtoframe(regs, lwp_frame(l)); lwp_frame(l)->tf_regs[FRAME_PC] = regs->r_regs[R_ZERO]; lwp_pcb(l)->pcb_hw.apcb_usp = regs->r_regs[R_SP]; return (0); } int process_sstep(struct lwp *l, int sstep) { if (sstep) return (EINVAL); return (0); } int process_set_pc(struct lwp *l, void *addr) { struct trapframe *frame = lwp_frame(l); frame->tf_regs[FRAME_PC] = (u_int64_t)addr; return (0); } int process_read_fpregs(struct lwp *l, struct fpreg *regs) { if (l->l_addr->u_pcb.pcb_fpcpu != NULL) fpusave_proc(l, 1); memcpy(regs, lwp_fpframe(l), sizeof(struct fpreg)); return (0); } int process_write_fpregs(struct lwp *l, const struct fpreg *regs) { if (l->l_addr->u_pcb.pcb_fpcpu != NULL) fpusave_proc(l, 0); memcpy(lwp_fpframe(l), regs, sizeof(struct fpreg)); return (0); }