From d6583bb2a13f329cf0332ef2570eb8bb8fc0e39c Mon Sep 17 00:00:00 2001 From: Theo de Raadt Date: Wed, 18 Oct 1995 08:53:40 +0000 Subject: initial import of NetBSD tree --- lib/libkvm/kvm_i386.c | 183 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 183 insertions(+) create mode 100644 lib/libkvm/kvm_i386.c (limited to 'lib/libkvm/kvm_i386.c') diff --git a/lib/libkvm/kvm_i386.c b/lib/libkvm/kvm_i386.c new file mode 100644 index 00000000000..3ded232157f --- /dev/null +++ b/lib/libkvm/kvm_i386.c @@ -0,0 +1,183 @@ +/*- + * Copyright (c) 1989, 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software developed by the Computer Systems + * Engineering group at Lawrence Berkeley Laboratory under DARPA contract + * BG 91-66 and contributed to Berkeley. + * + * 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +/* from: static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93"; */ +static char *rcsid = "$Id: kvm_i386.c,v 1.1 1995/10/18 08:42:44 deraadt Exp $"; +#endif /* LIBC_SCCS and not lint */ + +/* + * i386 machine dependent routines for kvm. Hopefully, the forthcoming + * vm code will one day obsolete this module. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +#include "kvm_private.h" + +#include + +#ifndef btop +#define btop(x) (((unsigned)(x)) >> PGSHIFT) /* XXX */ +#define ptob(x) ((caddr_t)((x) << PGSHIFT)) /* XXX */ +#endif + +struct vmstate { + pd_entry_t **PTDpaddr; + pd_entry_t *PTD; +}; + +#define KREAD(kd, addr, p)\ + (kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p))) + +void +_kvm_freevtop(kd) + kvm_t *kd; +{ + if (kd->vmst != 0) { + if (kd->vmst->PTD != 0) + free(kd->vmst->PTD); + + free(kd->vmst); + } +} + +int +_kvm_initvtop(kd) + kvm_t *kd; +{ + struct vmstate *vm; + struct nlist nlist[2]; + pt_entry_t *tmpPTD; + + vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); + if (vm == 0) + return (-1); + kd->vmst = vm; + + nlist[0].n_name = "_PTDpaddr"; + nlist[1].n_name = 0; + + if (kvm_nlist(kd, nlist) != 0) { + _kvm_err(kd, kd->program, "bad namelist"); + return (-1); + } + + vm->PTDpaddr = 0; + vm->PTD = 0; + if (KREAD(kd, (u_long)nlist[0].n_value - KERNBASE, &vm->PTDpaddr)) { + _kvm_err(kd, kd->program, "cannot read PTDpaddr"); + return (-1); + } + + tmpPTD = (pd_entry_t *)_kvm_malloc(kd, NBPG); + if ((kvm_read(kd, (u_long)vm->PTDpaddr, tmpPTD, NBPG)) != NBPG) { + free(tmpPTD); + _kvm_err(kd, kd->program, "cannot read PTD"); + return (-1); + } + vm->PTD = tmpPTD; + return (0); +} + +/* + * Translate a kernel virtual address to a physical address. + */ +int +_kvm_kvatop(kd, va, pa) + kvm_t *kd; + u_long va; + u_long *pa; +{ + struct vmstate *vm; + u_long offset; + u_long pte_pa; + pt_entry_t pte; + + if (ISALIVE(kd)) { + _kvm_err(kd, 0, "vatop called in live kernel!"); + return(0); + } + + vm = kd->vmst; + offset = va & PGOFSET; + + /* + * If we are initializing (kernel page table descriptor pointer + * not yet set) * then return pa == va to avoid infinite recursion. + */ + if (vm->PTD == 0) { + *pa = va; + return (NBPG - offset); + } + if ((vm->PTD[pdei(va)] & PG_V) == 0) + goto invalid; + + pte_pa = (vm->PTD[pdei(va)] & PG_FRAME) + + (ptei(va) * sizeof(pt_entry_t)); + /* XXX READ PHYSICAL XXX */ + { + if (lseek(kd->pmfd, (off_t)pte_pa, 0) == -1 && errno != 0) { + _kvm_syserr(kd, 0, "kvm_lseek"); + goto invalid; + } + if (read(kd->pmfd, &pte, sizeof pte) != sizeof pte) { + _kvm_syserr(kd, kd->program, "kvm_read"); + goto invalid; + } + } + + *pa = (pte & PG_FRAME) + offset; + return (NBPG - offset); + +invalid: + _kvm_err(kd, 0, "invalid address (%x)", va); + return (0); +} -- cgit v1.2.3