IABSD.fr/src/lib/libkvm/kvm_arm64.c

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• Author : deraadt
  Date : 2021-12-01 21:45:19
  Hash : d415763e
  Message : sys/core.h is not needed by these files, therefore sys/param.h isn't needed for MAXCOMLEN either

• lib/libkvm/kvm_arm64.c

• /*	$OpenBSD: kvm_arm64.c,v 1.3 2021/12/01 21:45:19 deraadt Exp $	*/
  /*
   * Copyright (c) 2006 Miodrag Vallat.
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice, this permission notice, and the disclaimer below
   * appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  /*-
   * Copyright (C) 1996 Wolfgang Solfrank.
   * Copyright (C) 1996 TooLs GmbH.
   * All rights reserved.
   *
   * 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 TooLs GmbH.
   * 4. The name of TooLs GmbH may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
   */
  
  /*
   * ARM64 machine dependent routines for kvm.
   */
  
  #include <sys/types.h>
  #include <sys/kcore.h>
  
  #include <unistd.h>
  #include <stdlib.h>
  #include <nlist.h>
  #include <kvm.h>
  
  #include <db.h>
  
  #include "kvm_private.h"
  
  #include <machine/kcore.h>
  
  void
  _kvm_freevtop(kvm_t *kd)
  {
  	free(kd->vmst);
  	kd->vmst = NULL;
  }
  
  int
  _kvm_initvtop(kvm_t *kd)
  {
  	return (0);
  }
  
  /*
   * Translate a kernel virtual address to a physical address by walking
   * the kernels page table.
   */
  
  int
  _kvm_kvatop(kvm_t *kd, u_long va, paddr_t *pa)
  {
  	cpu_kcore_hdr_t *cpup = kd->cpu_data;
  
  	if (ISALIVE(kd)) {
  		_kvm_err(kd, 0, "vatop called in live kernel!");
  		return (0);
  	}
  
  	/*
  	 * This relies upon the kernel text and data being contiguous
  	 * in the first memory segment.
  	 * Other virtual addresses are not reachable yet.
  	 */
  
  	if (va >= cpup->kernelbase + cpup->kerneloffs &&
  	    va < cpup->kernelbase + cpup->kerneloffs + cpup->staticsize) {
  		*pa = (va - cpup->kernelbase) +
  		    (paddr_t)cpup->ram_segs[0].start;
  		return (int)(kd->nbpg - (va & (kd->nbpg - 1)));
  	}
  
  	_kvm_err(kd, 0, "kvm_vatop: va %lx unreachable", va);
  	return (0);
  }
  
  off_t
  _kvm_pa2off(kvm_t *kd, paddr_t pa)
  {
  	cpu_kcore_hdr_t *cpup = kd->cpu_data;
  	phys_ram_seg_t *mp = cpup->ram_segs;
  	off_t off = 0;
  	int block;
  
  	for (block = 0; block < NPHYS_RAM_SEGS; block++, mp++) {
  		if (pa >= mp->start && pa < mp->start + mp->size)
  			return (kd->dump_off + off +
  			    (off_t)(pa - (paddr_t)mp->start));
  		off += (off_t)mp->size;
  	}
  
  	_kvm_err(kd, 0, "not a physical address: %lx", pa);
  	return (-1);
  }