/* $OpenBSD: process_machdep.c,v 1.4 2008/07/28 17:50:11 miod Exp $ */ /* * Copyright (c) 1993 The Regents of the University of California. * Copyright (c) 1993 Jan-Simon Pendry * All rights reserved. * * This code is derived from software contributed to Berkeley by * Jan-Simon Pendry. * * 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. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * from: Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel */ /* * 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 (). * 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 #include #include #include #include #include #include #include #include #include #include int process_read_regs(p, regs) struct proc *p; struct reg *regs; { bcopy((caddr_t)USER_REGS(p), (caddr_t)regs, sizeof(struct reg)); return (0); } #ifdef PTRACE int process_write_regs(p, regs) struct proc *p; struct reg *regs; { struct reg *procregs = (struct reg *)USER_REGS(p); unsigned int psr = procregs->epsr; bcopy(regs, procregs, sizeof(struct reg)); procregs->epsr = (psr & PSR_USERSTATIC) | (regs->epsr & ~PSR_USERSTATIC); return (0); } /* process_sstep() is in trap.c */ int process_set_pc(p, addr) struct proc *p; caddr_t addr; { struct reg *regs; regs = USER_REGS(p); regs->sxip = (u_int)addr; regs->snip = (u_int)addr + 4; return (0); } #endif /* PTRACE */