9da227510d
Imported with no changes, but not all parts are expected to be functional. The libc nlist functionality is enabled for the purpose of successful linking, although the nlist functionaly has not been tested on MINIX3 nor is it needed for how we use libkvm. In terms of function calls: kvm_getproc2, kvm_getargv2, kvm_getenvv2, and kvm_getlwps are expected to work, whereas kvm_getproc, kvm_getargv, kvm_getenvv, and kvm_getfiles are not. Change-Id: I7539209736f1771fc0b7db5e839d2df72f5ac615
131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
/* $NetBSD: kvm_i386pae.c,v 1.2 2014/02/19 20:21:22 dsl Exp $ */
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/*
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* Copyright (c) 2010 Jean-Yves Migeon.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: kvm_i386pae.c,v 1.2 2014/02/19 20:21:22 dsl Exp $");
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/*
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* This will expose PAE functions, macros, definitions and constants.
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* Note: this affects all virtual memory related functions. Only their
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* PAE versions can be used below.
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*/
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#define PAE
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/kcore.h>
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#include <sys/types.h>
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#include <stdlib.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 <uvm/uvm_extern.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 <i386/kcore.h>
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#include <i386/pmap.h>
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#include <i386/pte.h>
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#include <i386/vmparam.h>
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int _kvm_kvatop_i386pae(kvm_t *, vaddr_t, paddr_t *);
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/*
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* Used to translate a virtual address to a physical address for systems
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* running under PAE mode. Three levels of virtual memory pages are handled
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* here: the per-CPU L3 page, the 4 L2 PDs and the PTs.
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*/
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int
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_kvm_kvatop_i386pae(kvm_t *kd, vaddr_t va, paddr_t *pa)
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{
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cpu_kcore_hdr_t *cpu_kh;
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u_long page_off;
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pd_entry_t pde;
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pt_entry_t pte;
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paddr_t pde_pa, pte_pa;
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cpu_kh = kd->cpu_data;
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page_off = va & PGOFSET;
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/*
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* Find and read the PDE. Ignore the L3, as it is only a per-CPU
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* page, not needed for kernel VA => PA translations.
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* Remember that the 4 L2 pages are contiguous, so it is safe
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* to increment pdppaddr to compute the address of the PDE.
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* pdppaddr being PAGE_SIZE aligned, we mask the option bits.
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*/
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pde_pa = (cpu_kh->pdppaddr & PG_FRAME) + (pl2_pi(va) * sizeof(pde));
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if (_kvm_pread(kd, kd->pmfd, (void *)&pde, sizeof(pde),
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_kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
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_kvm_syserr(kd, 0, "could not read PDE");
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goto lose;
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}
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/*
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* Find and read the page table entry.
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*/
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if ((pde & PG_V) == 0) {
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_kvm_err(kd, 0, "invalid translation (invalid PDE)");
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goto lose;
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}
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if ((pde & PG_PS) != 0) {
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/*
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* This is a 2MB page.
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*/
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page_off = va & ((vaddr_t)~PG_LGFRAME);
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*pa = (pde & PG_LGFRAME) + page_off;
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return (int)(NBPD_L2 - page_off);
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}
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pte_pa = (pde & PG_FRAME) + (pl1_pi(va) * sizeof(pt_entry_t));
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if (_kvm_pread(kd, kd->pmfd, (void *) &pte, sizeof(pte),
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_kvm_pa2off(kd, pte_pa)) != sizeof(pte)) {
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_kvm_syserr(kd, 0, "could not read PTE");
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goto lose;
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}
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/*
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* Validate the PTE and return the physical address.
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*/
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if ((pte & PG_V) == 0) {
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_kvm_err(kd, 0, "invalid translation (invalid PTE)");
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goto lose;
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}
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*pa = (pte & PG_FRAME) + page_off;
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return (int)(NBPG - page_off);
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lose:
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*pa = (paddr_t)~0L;
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return 0;
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}
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