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kvm_vax.c revision 1.19 
      1 /*	$NetBSD: kvm_vax.c,v 1.19 2014/01/27 21:00:01 matt Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software developed by the Computer Systems
      8  * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
      9  * BG 91-66 and contributed to Berkeley.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 /*
     37  * VAX machine dependent routines for kvm.  Hopefully, the forthcoming
     38  * vm code will one day obsolete this module.  Furthermore, I hope it
     39  * gets here soon, because this basically is an error stub! (sorry)
     40  * This code may not work anyway.
     41  */
     42 
     43 #include <sys/param.h>
     44 #include <sys/user.h>
     45 #include <sys/proc.h>
     46 #include <sys/stat.h>
     47 #include <sys/types.h>
     48 
     49 #include <unistd.h>
     50 #include <nlist.h>
     51 #include <stdlib.h>
     52 #include <kvm.h>
     53 
     54 #include <uvm/uvm_extern.h>
     55 
     56 #include <machine/vmparam.h>
     57 
     58 #include <limits.h>
     59 #include <db.h>
     60 
     61 #include "kvm_private.h"
     62 
     63 __RCSID("$NetBSD: kvm_vax.c,v 1.19 2014/01/27 21:00:01 matt Exp $");
     64 
     65 struct vmstate {
     66 	u_long end;
     67 };
     68 
     69 void
     70 _kvm_freevtop(kvm_t *kd)
     71 {
     72 	if (kd->vmst != 0)
     73 		free(kd->vmst);
     74 }
     75 
     76 int
     77 _kvm_initvtop(kvm_t *kd)
     78 {
     79 	struct vmstate *vm;
     80 	struct stat st;
     81 	struct nlist nl[2];
     82 
     83 	vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
     84 	if (vm == 0)
     85 		return (-1);
     86 
     87 	kd->vmst = vm;
     88 
     89 	if (fstat(kd->pmfd, &st) < 0)
     90 		return (-1);
     91 
     92 	/* Get end of kernel address */
     93 	nl[0].n_name = "_end";
     94 	nl[1].n_name = 0;
     95 	if (kvm_nlist(kd, nl) != 0) {
     96 		_kvm_err(kd, kd->program, "pmap_stod: no such symbol");
     97 		return (-1);
     98 	}
     99 	vm->end = (u_long)nl[0].n_value;
    100 
    101 	return (0);
    102 }
    103 
    104 #define VA_OFF(va) (va & (NBPG - 1))
    105 
    106 /*
    107  * Translate a kernel virtual address to a physical address using the
    108  * mapping information in kd->vm.  Returns the result in pa, and returns
    109  * the number of bytes that are contiguously available from this
    110  * physical address.  This routine is used only for crash dumps.
    111  */
    112 int
    113 _kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa)
    114 {
    115 	u_long end;
    116 
    117 	if (va < (u_long) KERNBASE) {
    118 		_kvm_err(kd, 0, "invalid address (%#"PRIxVADDR"<%lx)", va,
    119 		    (u_long)KERNBASE);
    120 		return (0);
    121 	}
    122 
    123 	end = kd->vmst->end;
    124 	if (va >= end) {
    125 		_kvm_err(kd, 0, "invalid address (%#"PRIxVADDR"<%lx)", va,
    126 		    end);
    127 		return (0);
    128 	}
    129 
    130 	*pa = (va - (u_long) KERNBASE);
    131 	return (end - va);
    132 }
    133 
    134 /*
    135  * Translate a physical address to a file-offset in the crash dump.
    136  * XXX - crash dump doesn't work anyway.
    137  */
    138 off_t
    139 _kvm_pa2off(kvm_t *kd, paddr_t pa)
    140 {
    141 	return(kd->dump_off + pa);
    142 }
    143 
    144 
    145 /*
    146  * Machine-dependent initialization for ALL open kvm descriptors,
    147  * not just those for a kernel crash dump.  Some architectures
    148  * have to deal with these NOT being constants!  (i.e. m68k)
    149  */
    150 int
    151 _kvm_mdopen(kvm_t *kd)
    152 {
    153 
    154 	kd->usrstack = USRSTACK;
    155 	kd->min_uva = VM_MIN_ADDRESS;
    156 	kd->max_uva = VM_MAXUSER_ADDRESS;
    157 
    158 	return (0);
    159 }
    160