initial import of NetBSD tree

1 files changed, 183 insertions, 0 deletions

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 <sys/param.h>
+#include <sys/user.h>
+#include <sys/proc.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <nlist.h>
+#include <kvm.h>
+
+#include <vm/vm.h>
+#include <vm/vm_param.h>
+
+#include <limits.h>
+#include <db.h>
+
+#include "kvm_private.h"
+
+#include <machine/pte.h>
+
+#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);
+}