the rest of the libs stuff; from art@ again

1 files changed, 209 insertions, 0 deletions

diff --git a/lib/libkvm/kvm_x86_64.c b/lib/libkvm/kvm_x86_64.c
new file mode 100644
index 00000000000..b1b4b93046d
--- /dev/null
+++ b/lib/libkvm/kvm_x86_64.c
@@ -0,0 +1,209 @@
+/*	$OpenBSD: kvm_x86_64.c,v 1.1 2004/01/28 01:51:40 mickey Exp $	*/
+/*	$NetBSD: kvm_x86_64.c,v 1.3 2002/06/05 22:01:55 fvdl Exp $	*/
+
+/*-
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+
+/*
+ * x86-64 machine dependent routines for kvm.
+ */
+
+#include <sys/param.h>
+#include <sys/user.h>
+#include <sys/proc.h>
+#include <sys/stat.h>
+#include <sys/kcore.h>
+#include <machine/kcore.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <nlist.h>
+#include <kvm.h>
+
+#include <uvm/uvm_extern.h>
+
+#include <limits.h>
+#include <db.h>
+
+#include "kvm_private.h"
+
+#include <machine/pmap.h>
+#include <machine/pte.h>
+#include <machine/vmparam.h>
+
+void
+_kvm_freevtop(kd)
+	kvm_t *kd;
+{
+
+	/* Not actually used for anything right now, but safe. */
+	if (kd->vmst != 0)
+		free(kd->vmst);
+}
+
+/*ARGSUSED*/
+int
+_kvm_initvtop(kd)
+	kvm_t *kd;
+{
+
+	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;
+{
+	cpu_kcore_hdr_t *cpu_kh;
+	u_long page_off;
+	pd_entry_t pde;
+	pt_entry_t pte;
+	paddr_t pde_pa, pte_pa;
+
+	if (ISALIVE(kd)) {
+		_kvm_err(kd, 0, "vatop called in live kernel!");
+		return (0);
+	}
+
+	cpu_kh = kd->cpu_data;
+	page_off = va & PGOFSET;
+
+	/*
+	 * Find and read all entries to get to the pa.
+	 */
+
+	/*
+	 * Level 4.
+	 */
+	pde_pa = cpu_kh->ptdpaddr + (pl4_i(va) * sizeof(pd_entry_t));
+	if (pread(kd->pmfd, (void *)&pde, sizeof(pde),
+	    _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
+		_kvm_syserr(kd, 0, "could not read PT level 4 entry");
+		goto lose;
+	}
+	if ((pde & PG_V) == 0) {
+		_kvm_err(kd, 0, "invalid translation (invalid level 4 PDE)");
+		goto lose;
+	}
+
+	/*
+	 * Level 3.
+	 */
+	pde_pa = (pde_pa + PG_FRAME) + (pl3_i(va) * sizeof(pd_entry_t));
+	if (pread(kd->pmfd, (void *)&pde, sizeof(pde),
+	    _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
+		_kvm_syserr(kd, 0, "could not read PT level 3 entry");
+		goto lose;
+	}
+	if ((pde & PG_V) == 0) {
+		_kvm_err(kd, 0, "invalid translation (invalid level 3 PDE)");
+		goto lose;
+	}
+
+	/*
+	 * Level 2.
+	 */
+	pde_pa = (pde_pa & PG_FRAME) + (pl2_i(va) * sizeof(pd_entry_t));
+	if (pread(kd->pmfd, (void *)&pde, sizeof(pde),
+	    _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
+		_kvm_syserr(kd, 0, "could not read PT level 2 entry");
+		goto lose;
+	}
+	if ((pde & PG_V) == 0) {
+		_kvm_err(kd, 0, "invalid translation (invalid level 2 PDE)");
+		goto lose;
+	}
+
+
+	/*
+	 * Level 1.
+	 */
+	pte_pa = (pde_pa & PG_FRAME) + (pl1_i(va) * sizeof(pt_entry_t));
+	if (pread(kd->pmfd, (void *) &pte, sizeof(pte),
+	    _kvm_pa2off(kd, pte_pa)) != sizeof(pte)) {
+		_kvm_syserr(kd, 0, "could not read PTE");
+		goto lose;
+	}
+	/*
+	 * Validate the PTE and return the physical address.
+	 */
+	if ((pte & PG_V) == 0) {
+		_kvm_err(kd, 0, "invalid translation (invalid PTE)");
+		goto lose;
+	}
+	*pa = (pte & PG_FRAME) + page_off;
+	return (int)(NBPG - page_off);
+
+ lose:
+	*pa = (u_long)~0L;
+	return (0);
+}
+
+/*
+ * Translate a physical address to a file-offset in the crash dump.
+ */
+off_t
+_kvm_pa2off(kd, pa)
+	kvm_t *kd;
+	u_long pa;
+{
+	cpu_kcore_hdr_t *cpu_kh;
+	phys_ram_seg_t *ramsegs;
+	off_t off;
+	int i;
+
+	cpu_kh = kd->cpu_data;
+	ramsegs = (void *)((char *)(void *)cpu_kh + ALIGN(sizeof *cpu_kh));
+
+	off = 0;
+	for (i = 0; i < cpu_kh->nmemsegs; i++) {
+		if (pa >= ramsegs[i].start &&
+		    (pa - ramsegs[i].start) < ramsegs[i].size) {
+			off += (pa - ramsegs[i].start);
+			break;
+		}
+		off += ramsegs[i].size;
+	}
+
+	return (kd->dump_off + off);
+}