Initial commit of the libkvm code for the arm32 port.
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lib/libkvm/kvm_arm32.c
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204
lib/libkvm/kvm_arm32.c
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/* $NetBSD: kvm_arm32.c,v 1.1 1996/02/02 15:35:41 mark Exp $ */
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/*
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* Copyright (c) 1989, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software developed by the Computer Systems
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* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
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* BG 91-66 and contributed to Berkeley.
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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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* $Id: kvm_arm32.c,v 1.1 1996/02/02 15:35:41 mark Exp $
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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/* from: static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93"; */
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static char *rcsid = "$Id: kvm_arm32.c,v 1.1 1996/02/02 15:35:41 mark Exp $";
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#endif /* LIBC_SCCS and not lint */
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/*
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* arm32 machine dependent routines for kvm.
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*/
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#include <sys/param.h>
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#include <sys/user.h>
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#include <sys/proc.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <nlist.h>
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#include <kvm.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <limits.h>
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#include <db.h>
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#include "kvm_private.h"
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#include <machine/pte.h>
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#ifndef btop
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#define btop(x) (((unsigned)(x)) >> PGSHIFT) /* XXX */
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#define ptob(x) ((caddr_t)((x) << PGSHIFT)) /* XXX */
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#endif
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struct vmstate {
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pd_entry_t **IdlePTD;
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pd_entry_t *PTD;
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};
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#define KREAD(kd, addr, p)\
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(kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p)))
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void
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_kvm_freevtop(kd)
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kvm_t *kd;
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{
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_kvm_err(kd, 0, "unsupported");
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return;
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if (kd->vmst->PTD != 0)
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free(kd->vmst->PTD);
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if (kd->vmst != 0)
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free(kd->vmst);
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}
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int
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_kvm_initvtop(kd)
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kvm_t *kd;
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{
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struct vmstate *vm;
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struct nlist nlist[2];
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_kvm_err(kd, 0, "unsupported");
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return (0);
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vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
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if (vm == 0)
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return (-1);
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kd->vmst = vm;
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nlist[0].n_name = "_IdlePTD";
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nlist[1].n_name = 0;
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if (kvm_nlist(kd, nlist) != 0) {
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_kvm_err(kd, kd->program, "bad namelist");
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return (-1);
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}
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vm->IdlePTD = 0;
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vm->PTD = 0;
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if (KREAD(kd, (u_long)nlist[0].n_value, &vm->IdlePTD)) {
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_kvm_err(kd, kd->program, "cannot read IdlePTD");
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return (-1);
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}
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vm->PTD = (pd_entry_t *)_kvm_malloc(kd, NBPG);
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if ((kvm_read(kd, (u_long)vm->IdlePTD, &vm->PTD, NBPG)) != NBPG) {
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_kvm_err(kd, kd->program, "cannot read PTD");
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return (-1);
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}
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return (0);
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}
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/*
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* Translate a kernel virtual address to a physical address.
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*/
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int
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_kvm_kvatop(kd, va, pa)
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kvm_t *kd;
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u_long va;
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u_long *pa;
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{
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struct vmstate *vm;
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u_long offset;
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_kvm_err(kd, 0, "unsupported");
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return (0);
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if (ISALIVE(kd)) {
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_kvm_err(kd, 0, "vatop called in live kernel!");
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return(0);
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}
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vm = kd->vmst;
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offset = va & PGOFSET;
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invalid:
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_kvm_err(kd, 0, "invalid address (%x)", va);
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return (0);
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}
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/*
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* Translate a user virtual address to a physical address.
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*/
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int
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_kvm_uvatop(kd, p, va, pa)
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kvm_t *kd;
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const struct proc *p;
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u_long va;
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u_long *pa;
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{
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struct vmspace vms;
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pd_entry_t pde, *pdeloc;
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pt_entry_t pte, *pteloc;
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u_long kva, offset;
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_kvm_err(kd, 0, "unsupported");
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return (0);
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if (va >= KERNBASE)
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goto invalid;
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/* XXX - should be passed a `kinfo_proc *' here */
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if (kvm_read(kd, (u_long)p->p_vmspace, (char *)&vms, sizeof(vms)) !=
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sizeof(vms))
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goto invalid;
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pdeloc = vms.vm_pmap.pm_pdir + (va >> PDSHIFT);
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if (kvm_read(kd, (u_long)pdeloc, (char *)&pde, sizeof(pde)) !=
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sizeof(pde))
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goto invalid;
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if (pde == 0)
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goto invalid;
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pteloc = (pt_entry_t *)(pde & PG_FRAME) + btop(va & PT_MASK);
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if (lseek(kd->pmfd, (off_t)(u_long)pteloc, 0) != (off_t)(u_long)pteloc)
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goto invalid;
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if (read(kd->pmfd, (char *)&pte, sizeof(pte)) != sizeof(pte))
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goto invalid;
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if (pte == 0)
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goto invalid;
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offset = va & PGOFSET;
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*pa = (pte & PG_FRAME) + offset;
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return (NBPG - offset);
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invalid:
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_kvm_err(kd, 0, "invalid address (%x)", va);
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return (0);
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}
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