This is a COPY of kvm_hp300.c, soon to be patched to sorta work with

the i386 port.

2 files changed, 572 insertions, 0 deletions

diff --git a/lib/libkvm/kvm_amd64.c b/lib/libkvm/kvm_amd64.c
new file mode 100644
index 000000000000..2154a23f3007
--- /dev/null
+++ b/lib/libkvm/kvm_amd64.c
@@ -0,0 +1,286 @@
+/*-
+ * 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)
+static char sccsid[] = "@(#)kvm_hp300.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * Hp300 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 <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"
+
+#if defined(hp300)
+#include <hp300/hp300/pte.h>
+#endif
+
+#if defined(luna68k)
+#include <luna68k/luna68k/pte.h>
+#endif
+
+#ifndef btop
+#define	btop(x)		(((unsigned)(x)) >> PGSHIFT)	/* XXX */
+#define	ptob(x)		((caddr_t)((x) << PGSHIFT))	/* XXX */
+#endif
+
+struct vmstate {
+	u_long lowram;
+	int mmutype;
+	struct ste *Sysseg;
+};
+
+#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)
+		free(kd->vmst);
+}
+
+int
+_kvm_initvtop(kd)
+	kvm_t *kd;
+{
+	struct vmstate *vm;
+	struct nlist nlist[4];
+
+	vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
+	if (vm == 0)
+		return (-1);
+	kd->vmst = vm;
+
+	nlist[0].n_name = "_lowram";
+	nlist[1].n_name = "_mmutype";
+	nlist[2].n_name = "_Sysseg";
+	nlist[3].n_name = 0;
+
+	if (kvm_nlist(kd, nlist) != 0) {
+		_kvm_err(kd, kd->program, "bad namelist");
+		return (-1);
+	}
+	vm->Sysseg = 0;
+	if (KREAD(kd, (u_long)nlist[0].n_value, &vm->lowram)) {
+		_kvm_err(kd, kd->program, "cannot read lowram");
+		return (-1);
+	}
+	if (KREAD(kd, (u_long)nlist[1].n_value, &vm->mmutype)) {
+		_kvm_err(kd, kd->program, "cannot read mmutype");
+		return (-1);
+	}
+	if (KREAD(kd, (u_long)nlist[2].n_value, &vm->Sysseg)) {
+		_kvm_err(kd, kd->program, "cannot read segment table");
+		return (-1);
+	}
+	return (0);
+}
+
+static int
+_kvm_vatop(kd, sta, va, pa)
+	kvm_t *kd;
+	struct ste *sta;
+	u_long va;
+	u_long *pa;
+{
+	register struct vmstate *vm;
+	register u_long lowram;
+	register u_long addr;
+	int p, ste, pte;
+	int offset;
+
+	if (ISALIVE(kd)) {
+		_kvm_err(kd, 0, "vatop called in live kernel!");
+		return((off_t)0);
+	}
+	vm = kd->vmst;
+	offset = va & PGOFSET;
+	/*
+	 * If we are initializing (kernel segment table pointer not yet set)
+	 * then return pa == va to avoid infinite recursion.
+	 */
+	if (vm->Sysseg == 0) {
+		*pa = va;
+		return (NBPG - offset);
+	}
+	lowram = vm->lowram;
+	if (vm->mmutype == -2) {
+		struct ste *sta2;
+
+		addr = (u_long)&sta[va >> SG4_SHIFT1];
+		/*
+		 * Can't use KREAD to read kernel segment table entries.
+		 * Fortunately it is 1-to-1 mapped so we don't have to. 
+		 */
+		if (sta == vm->Sysseg) {
+			if (lseek(kd->pmfd, (off_t)addr, 0) == -1 ||
+			    read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
+				goto invalid;
+		} else if (KREAD(kd, addr, &ste))
+			goto invalid;
+		if ((ste & SG_V) == 0) {
+			_kvm_err(kd, 0, "invalid level 1 descriptor (%x)",
+				 ste);
+			return((off_t)0);
+		}
+		sta2 = (struct ste *)(ste & SG4_ADDR1);
+		addr = (u_long)&sta2[(va & SG4_MASK2) >> SG4_SHIFT2];
+		/*
+		 * Address from level 1 STE is a physical address,
+		 * so don't use kvm_read.
+		 */
+		if (lseek(kd->pmfd, (off_t)(addr - lowram), 0) == -1 || 
+		    read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
+			goto invalid;
+		if ((ste & SG_V) == 0) {
+			_kvm_err(kd, 0, "invalid level 2 descriptor (%x)",
+				 ste);
+			return((off_t)0);
+		}
+		sta2 = (struct ste *)(ste & SG4_ADDR2);
+		addr = (u_long)&sta2[(va & SG4_MASK3) >> SG4_SHIFT3];
+	} else {
+		addr = (u_long)&sta[va >> SEGSHIFT];
+		/*
+		 * Can't use KREAD to read kernel segment table entries.
+		 * Fortunately it is 1-to-1 mapped so we don't have to. 
+		 */
+		if (sta == vm->Sysseg) {
+			if (lseek(kd->pmfd, (off_t)addr, 0) == -1 ||
+			    read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
+				goto invalid;
+		} else if (KREAD(kd, addr, &ste))
+			goto invalid;
+		if ((ste & SG_V) == 0) {
+			_kvm_err(kd, 0, "invalid segment (%x)", ste);
+			return((off_t)0);
+		}
+		p = btop(va & SG_PMASK);
+		addr = (ste & SG_FRAME) + (p * sizeof(struct pte));
+	}
+	/*
+	 * Address from STE is a physical address so don't use kvm_read.
+	 */
+	if (lseek(kd->pmfd, (off_t)(addr - lowram), 0) == -1 || 
+	    read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0)
+		goto invalid;
+	addr = pte & PG_FRAME;
+	if (pte == PG_NV) {
+		_kvm_err(kd, 0, "page not valid");
+		return (0);
+	}
+	*pa = addr - lowram + offset;
+	
+	return (NBPG - offset);
+invalid:
+	_kvm_err(kd, 0, "invalid address (%x)", va);
+	return (0);
+}
+
+int
+_kvm_kvatop(kd, va, pa)
+	kvm_t *kd;
+	u_long va;
+	u_long *pa;
+{
+	return (_kvm_vatop(kd, (u_long)kd->vmst->Sysseg, va, pa));
+}
+
+/*
+ * Translate a user virtual address to a physical address.
+ */
+int
+_kvm_uvatop(kd, p, va, pa)
+	kvm_t *kd;
+	const struct proc *p;
+	u_long va;
+	u_long *pa;
+{
+	register struct vmspace *vms = p->p_vmspace;
+	int kva;
+
+	/*
+	 * If this is a live kernel we just look it up in the kernel
+	 * virtually allocated flat 4mb page table (i.e. let the kernel
+	 * do the table walk).  In this way, we avoid needing to know
+	 * the MMU type.
+	 */
+	if (ISALIVE(kd)) {
+		struct pte *ptab;
+		int pte, offset;
+
+		kva = (int)&vms->vm_pmap.pm_ptab;
+		if (KREAD(kd, kva, &ptab)) {
+			_kvm_err(kd, 0, "invalid address (%x)", va);
+			return (0);
+		}
+		kva = (int)&ptab[btop(va)];
+		if (KREAD(kd, kva, &pte) || (pte & PG_V) == 0) {
+			_kvm_err(kd, 0, "invalid address (%x)", va);
+			return (0);
+		}
+		offset = va & PGOFSET;
+		*pa = (pte & PG_FRAME) | offset;
+		return (NBPG - offset);
+	}
+	/*
+	 * Otherwise, we just walk the table ourself.
+	 */
+	kva = (int)&vms->vm_pmap.pm_stab;
+	if (KREAD(kd, kva, &kva)) {
+		_kvm_err(kd, 0, "invalid address (%x)", va);
+		return (0);
+	}
+	return (_kvm_vatop(kd, kva, va, pa));
+}
diff --git a/lib/libkvm/kvm_i386.c b/lib/libkvm/kvm_i386.c
new file mode 100644
index 000000000000..2154a23f3007
--- /dev/null
+++ b/lib/libkvm/kvm_i386.c
@@ -0,0 +1,286 @@
+/*-
+ * 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)
+static char sccsid[] = "@(#)kvm_hp300.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * Hp300 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 <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"
+
+#if defined(hp300)
+#include <hp300/hp300/pte.h>
+#endif
+
+#if defined(luna68k)
+#include <luna68k/luna68k/pte.h>
+#endif
+
+#ifndef btop
+#define	btop(x)		(((unsigned)(x)) >> PGSHIFT)	/* XXX */
+#define	ptob(x)		((caddr_t)((x) << PGSHIFT))	/* XXX */
+#endif
+
+struct vmstate {
+	u_long lowram;
+	int mmutype;
+	struct ste *Sysseg;
+};
+
+#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)
+		free(kd->vmst);
+}
+
+int
+_kvm_initvtop(kd)
+	kvm_t *kd;
+{
+	struct vmstate *vm;
+	struct nlist nlist[4];
+
+	vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
+	if (vm == 0)
+		return (-1);
+	kd->vmst = vm;
+
+	nlist[0].n_name = "_lowram";
+	nlist[1].n_name = "_mmutype";
+	nlist[2].n_name = "_Sysseg";
+	nlist[3].n_name = 0;
+
+	if (kvm_nlist(kd, nlist) != 0) {
+		_kvm_err(kd, kd->program, "bad namelist");
+		return (-1);
+	}
+	vm->Sysseg = 0;
+	if (KREAD(kd, (u_long)nlist[0].n_value, &vm->lowram)) {
+		_kvm_err(kd, kd->program, "cannot read lowram");
+		return (-1);
+	}
+	if (KREAD(kd, (u_long)nlist[1].n_value, &vm->mmutype)) {
+		_kvm_err(kd, kd->program, "cannot read mmutype");
+		return (-1);
+	}
+	if (KREAD(kd, (u_long)nlist[2].n_value, &vm->Sysseg)) {
+		_kvm_err(kd, kd->program, "cannot read segment table");
+		return (-1);
+	}
+	return (0);
+}
+
+static int
+_kvm_vatop(kd, sta, va, pa)
+	kvm_t *kd;
+	struct ste *sta;
+	u_long va;
+	u_long *pa;
+{
+	register struct vmstate *vm;
+	register u_long lowram;
+	register u_long addr;
+	int p, ste, pte;
+	int offset;
+
+	if (ISALIVE(kd)) {
+		_kvm_err(kd, 0, "vatop called in live kernel!");
+		return((off_t)0);
+	}
+	vm = kd->vmst;
+	offset = va & PGOFSET;
+	/*
+	 * If we are initializing (kernel segment table pointer not yet set)
+	 * then return pa == va to avoid infinite recursion.
+	 */
+	if (vm->Sysseg == 0) {
+		*pa = va;
+		return (NBPG - offset);
+	}
+	lowram = vm->lowram;
+	if (vm->mmutype == -2) {
+		struct ste *sta2;
+
+		addr = (u_long)&sta[va >> SG4_SHIFT1];
+		/*
+		 * Can't use KREAD to read kernel segment table entries.
+		 * Fortunately it is 1-to-1 mapped so we don't have to. 
+		 */
+		if (sta == vm->Sysseg) {
+			if (lseek(kd->pmfd, (off_t)addr, 0) == -1 ||
+			    read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
+				goto invalid;
+		} else if (KREAD(kd, addr, &ste))
+			goto invalid;
+		if ((ste & SG_V) == 0) {
+			_kvm_err(kd, 0, "invalid level 1 descriptor (%x)",
+				 ste);
+			return((off_t)0);
+		}
+		sta2 = (struct ste *)(ste & SG4_ADDR1);
+		addr = (u_long)&sta2[(va & SG4_MASK2) >> SG4_SHIFT2];
+		/*
+		 * Address from level 1 STE is a physical address,
+		 * so don't use kvm_read.
+		 */
+		if (lseek(kd->pmfd, (off_t)(addr - lowram), 0) == -1 || 
+		    read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
+			goto invalid;
+		if ((ste & SG_V) == 0) {
+			_kvm_err(kd, 0, "invalid level 2 descriptor (%x)",
+				 ste);
+			return((off_t)0);
+		}
+		sta2 = (struct ste *)(ste & SG4_ADDR2);
+		addr = (u_long)&sta2[(va & SG4_MASK3) >> SG4_SHIFT3];
+	} else {
+		addr = (u_long)&sta[va >> SEGSHIFT];
+		/*
+		 * Can't use KREAD to read kernel segment table entries.
+		 * Fortunately it is 1-to-1 mapped so we don't have to. 
+		 */
+		if (sta == vm->Sysseg) {
+			if (lseek(kd->pmfd, (off_t)addr, 0) == -1 ||
+			    read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
+				goto invalid;
+		} else if (KREAD(kd, addr, &ste))
+			goto invalid;
+		if ((ste & SG_V) == 0) {
+			_kvm_err(kd, 0, "invalid segment (%x)", ste);
+			return((off_t)0);
+		}
+		p = btop(va & SG_PMASK);
+		addr = (ste & SG_FRAME) + (p * sizeof(struct pte));
+	}
+	/*
+	 * Address from STE is a physical address so don't use kvm_read.
+	 */
+	if (lseek(kd->pmfd, (off_t)(addr - lowram), 0) == -1 || 
+	    read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0)
+		goto invalid;
+	addr = pte & PG_FRAME;
+	if (pte == PG_NV) {
+		_kvm_err(kd, 0, "page not valid");
+		return (0);
+	}
+	*pa = addr - lowram + offset;
+	
+	return (NBPG - offset);
+invalid:
+	_kvm_err(kd, 0, "invalid address (%x)", va);
+	return (0);
+}
+
+int
+_kvm_kvatop(kd, va, pa)
+	kvm_t *kd;
+	u_long va;
+	u_long *pa;
+{
+	return (_kvm_vatop(kd, (u_long)kd->vmst->Sysseg, va, pa));
+}
+
+/*
+ * Translate a user virtual address to a physical address.
+ */
+int
+_kvm_uvatop(kd, p, va, pa)
+	kvm_t *kd;
+	const struct proc *p;
+	u_long va;
+	u_long *pa;
+{
+	register struct vmspace *vms = p->p_vmspace;
+	int kva;
+
+	/*
+	 * If this is a live kernel we just look it up in the kernel
+	 * virtually allocated flat 4mb page table (i.e. let the kernel
+	 * do the table walk).  In this way, we avoid needing to know
+	 * the MMU type.
+	 */
+	if (ISALIVE(kd)) {
+		struct pte *ptab;
+		int pte, offset;
+
+		kva = (int)&vms->vm_pmap.pm_ptab;
+		if (KREAD(kd, kva, &ptab)) {
+			_kvm_err(kd, 0, "invalid address (%x)", va);
+			return (0);
+		}
+		kva = (int)&ptab[btop(va)];
+		if (KREAD(kd, kva, &pte) || (pte & PG_V) == 0) {
+			_kvm_err(kd, 0, "invalid address (%x)", va);
+			return (0);
+		}
+		offset = va & PGOFSET;
+		*pa = (pte & PG_FRAME) | offset;
+		return (NBPG - offset);
+	}
+	/*
+	 * Otherwise, we just walk the table ourself.
+	 */
+	kva = (int)&vms->vm_pmap.pm_stab;
+	if (KREAD(kd, kva, &kva)) {
+		_kvm_err(kd, 0, "invalid address (%x)", va);
+		return (0);
+	}
+	return (_kvm_vatop(kd, kva, va, pa));
+}