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-rw-r--r--lib/libkvm/kvm_amd64.c243
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diff --git a/lib/libkvm/kvm_amd64.c b/lib/libkvm/kvm_amd64.c
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+/*-
+ * 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>
+__FBSDID("$FreeBSD$");
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * AMD64 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 "kvm_private.h"
+
+#ifndef btop
+#define btop(x) (amd64_btop(x))
+#define ptob(x) (amd64_ptob(x))
+#endif
+
+struct vmstate {
+ pml4_entry_t *PML4;
+};
+
+void
+_kvm_freevtop(kvm_t *kd)
+{
+ if (kd->vmst != 0) {
+ if (kd->vmst->PML4) {
+ free(kd->vmst->PML4);
+ }
+ free(kd->vmst);
+ }
+}
+
+int
+_kvm_initvtop(kvm_t *kd)
+{
+ struct vmstate *vm;
+ struct nlist nlist[2];
+ u_long pa;
+ u_long kernbase;
+ pml4_entry_t *PML4;
+
+ vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
+ if (vm == 0) {
+ _kvm_err(kd, kd->program, "cannot allocate vm");
+ return (-1);
+ }
+ kd->vmst = vm;
+ vm->PML4 = 0;
+
+ nlist[0].n_name = "kernbase";
+ nlist[1].n_name = 0;
+
+ if (kvm_nlist(kd, nlist) != 0) {
+ _kvm_err(kd, kd->program, "bad namelist - no kernbase");
+ return (-1);
+ }
+ kernbase = nlist[0].n_value;
+
+ nlist[0].n_name = "KPML4phys";
+ nlist[1].n_name = 0;
+
+ if (kvm_nlist(kd, nlist) != 0) {
+ _kvm_err(kd, kd->program, "bad namelist - no KPML4phys");
+ return (-1);
+ }
+ if (kvm_read(kd, (nlist[0].n_value - kernbase), &pa, sizeof(pa)) !=
+ sizeof(pa)) {
+ _kvm_err(kd, kd->program, "cannot read KPML4phys");
+ return (-1);
+ }
+ PML4 = _kvm_malloc(kd, PAGE_SIZE);
+ if (kvm_read(kd, pa, PML4, PAGE_SIZE) != PAGE_SIZE) {
+ _kvm_err(kd, kd->program, "cannot read KPML4phys");
+ return (-1);
+ }
+ vm->PML4 = PML4;
+ return (0);
+}
+
+static int
+_kvm_vatop(kvm_t *kd, u_long va, u_long *pa)
+{
+ struct vmstate *vm;
+ u_long offset;
+ u_long pdpe_pa;
+ u_long pde_pa;
+ u_long pte_pa;
+ pml4_entry_t pml4e;
+ pdp_entry_t pdpe;
+ pd_entry_t pde;
+ pt_entry_t pte;
+ u_long pml4eindex;
+ u_long pdpeindex;
+ u_long pdeindex;
+ u_long pteindex;
+ int i;
+
+ if (ISALIVE(kd)) {
+ _kvm_err(kd, 0, "kvm_vatop called in live kernel!");
+ return((off_t)0);
+ }
+
+ vm = kd->vmst;
+ offset = va & (PAGE_SIZE - 1);
+
+ /*
+ * If we are initializing (kernel page table descriptor pointer
+ * not yet set) then return pa == va to avoid infinite recursion.
+ */
+ if (vm->PML4 == 0) {
+ *pa = va;
+ return (PAGE_SIZE - offset);
+ }
+
+ pml4eindex = (va >> PML4SHIFT) & (NPML4EPG - 1);
+ pml4e = vm->PML4[pml4eindex];
+ if (((u_long)pml4e & PG_V) == 0)
+ goto invalid;
+
+ pdpeindex = (va >> PDPSHIFT) & (NPDPEPG-1);
+ pdpe_pa = ((u_long)pml4e & PG_FRAME) + (pdpeindex * sizeof(pdp_entry_t));
+
+ /* XXX This has to be a physical address read, kvm_read is virtual */
+ if (lseek(kd->pmfd, pdpe_pa, 0) == -1) {
+ _kvm_syserr(kd, kd->program, "_kvm_vatop: lseek pdpe_pa");
+ goto invalid;
+ }
+ if (read(kd->pmfd, &pdpe, sizeof pdpe) != sizeof pdpe) {
+ _kvm_syserr(kd, kd->program, "_kvm_vatop: read pdpe");
+ goto invalid;
+ }
+ if (((u_long)pdpe & PG_V) == 0)
+ goto invalid;
+
+
+ pdeindex = (va >> PDRSHIFT) & (NPDEPG-1);
+ pde_pa = ((u_long)pdpe & PG_FRAME) + (pdeindex * sizeof(pd_entry_t));
+
+ /* XXX This has to be a physical address read, kvm_read is virtual */
+ if (lseek(kd->pmfd, pde_pa, 0) == -1) {
+ _kvm_syserr(kd, kd->program, "_kvm_vatop: lseek pde_pa");
+ goto invalid;
+ }
+ if (read(kd->pmfd, &pde, sizeof pde) != sizeof pde) {
+ _kvm_syserr(kd, kd->program, "_kvm_vatop: read pde");
+ goto invalid;
+ }
+ if (((u_long)pde & PG_V) == 0)
+ goto invalid;
+
+ if ((u_long)pde & PG_PS) {
+ /*
+ * No final-level page table; ptd describes one 2MB page.
+ */
+#define PAGE2M_MASK (NBPDR - 1)
+#define PG_FRAME2M (~PAGE2M_MASK)
+ *pa = ((u_long)pde & PG_FRAME2M) + (va & PAGE2M_MASK);
+ return (NBPDR - (va & PAGE2M_MASK));
+ }
+
+ pteindex = (va >> PAGE_SHIFT) & (NPTEPG-1);
+ pte_pa = ((u_long)pde & PG_FRAME) + (pteindex * sizeof(pt_entry_t));
+
+ /* XXX This has to be a physical address read, kvm_read is virtual */
+ if (lseek(kd->pmfd, pte_pa, 0) == -1) {
+ _kvm_syserr(kd, kd->program, "_kvm_vatop: lseek");
+ goto invalid;
+ }
+ if (read(kd->pmfd, &pte, sizeof pte) != sizeof pte) {
+ _kvm_syserr(kd, kd->program, "_kvm_vatop: read");
+ goto invalid;
+ }
+ if (((u_long)pte & PG_V) == 0)
+ goto invalid;
+
+ *pa = ((u_long)pte & PG_FRAME) + offset;
+ return (PAGE_SIZE - offset);
+
+invalid:
+ _kvm_err(kd, 0, "invalid address (%x)", va);
+ return (0);
+}
+
+int
+_kvm_kvatop(kvm_t *kd, u_long va, u_long *pa)
+{
+ return (_kvm_vatop(kd, va, pa));
+}
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