/* $NetBSD: process_machdep.c,v 1.21 2021/01/24 07:36:54 mrg Exp $ */ /* * Copyright (c) 1993 The Regents of the University of California. * 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 */ /* * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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 (<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> __KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.21 2021/01/24 07:36:54 mrg Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/time.h> #include <sys/kernel.h> #include <sys/proc.h> #include <sys/vnode.h> #include <sys/ptrace.h> #include <machine/psl.h> #include <machine/reg.h> #include <machine/frame.h> #include <machine/trap.h> int process_read_regs(struct lwp *l, struct reg *regs) { /* NOTE: struct reg == struct trapframe */ memcpy(regs, l->l_md.md_tf, sizeof(*regs)); return 0; } int process_write_regs(struct lwp *l, const struct reg *regs) { int psr = l->l_md.md_tf->tf_psr & ~PSR_ICC; if (((regs->r_pc | regs->r_npc) & 0x03) != 0) return EINVAL; memcpy(l->l_md.md_tf, regs, sizeof(*regs)); l->l_md.md_tf->tf_psr = psr | (regs->r_psr & PSR_ICC); 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) { if (((u_int)addr & 0x03) != 0) return EINVAL; l->l_md.md_tf->tf_pc = (u_int)addr; l->l_md.md_tf->tf_npc = (u_int)addr + 4; return 0; } int process_read_fpregs(struct lwp *l, struct fpreg *regs, size_t *sz) { struct fpstate *fs; if ((fs = l->l_md.md_fpstate) == NULL) fs = &initfpstate; *regs = fs->fs_reg; return 0; } int process_write_fpregs(struct lwp *l, const struct fpreg *regs, size_t sz) { struct fpstate *fs; if ((fs = l->l_md.md_fpstate) == NULL) { fs = kmem_zalloc(sizeof(*fs), KM_SLEEP); l->l_md.md_fpstate = fs; } else { /* Reset FP queue in this process `fpstate' */ fs->fs_qsize = 0; } /* Write new values to the FP registers */ fs->fs_reg = *regs; return 0; }
