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Annotation of src/lib/libkvm/kvm_vax.c, Revision 1.16

1.16    ! agc         1: /*     $NetBSD: kvm_vax.c,v 1.15 2003/05/16 10:24:56 wiz Exp $ */
1.3       thorpej     2:
1.1       ragge       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.
1.16    ! agc        19:  * 3. Neither the name of the University nor the names of its contributors
1.1       ragge      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 <unistd.h>
                     48: #include <nlist.h>
1.6       ragge      49: #include <stdlib.h>
1.1       ragge      50: #include <kvm.h>
                     51:
1.10      mrg        52: #include <uvm/uvm_extern.h>
1.1       ragge      53:
1.13      chuck      54: #include <machine/vmparam.h>
                     55:
1.1       ragge      56: #include <limits.h>
                     57: #include <db.h>
                     58:
                     59: #include "kvm_private.h"
1.13      chuck      60:
1.1       ragge      61:
                     62: struct vmstate {
                     63:        u_long end;
                     64: };
                     65:
                     66: void
                     67: _kvm_freevtop(kd)
                     68:        kvm_t *kd;
                     69: {
                     70:        if (kd->vmst != 0)
                     71:                free(kd->vmst);
                     72: }
                     73:
                     74: int
                     75: _kvm_initvtop(kd)
                     76:        kvm_t *kd;
                     77: {
1.7       perry      78:        struct vmstate *vm;
1.1       ragge      79:        struct stat st;
1.14      thorpej    80:        struct nlist nl[2];
1.1       ragge      81:
                     82:        vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
                     83:        if (vm == 0)
                     84:                return (-1);
                     85:
                     86:        kd->vmst = vm;
                     87:
                     88:        if (fstat(kd->pmfd, &st) < 0)
                     89:                return (-1);
                     90:
                     91:        /* Get end of kernel address */
1.14      thorpej    92:        nl[0].n_name = "_end";
                     93:        nl[1].n_name = 0;
                     94:        if (kvm_nlist(kd, nl) != 0) {
1.1       ragge      95:                _kvm_err(kd, kd->program, "pmap_stod: no such symbol");
                     96:                return (-1);
                     97:        }
1.14      thorpej    98:        vm->end = (u_long)nl[0].n_value;
1.1       ragge      99:
                    100:        return (0);
                    101: }
                    102:
                    103: #define VA_OFF(va) (va & (NBPG - 1))
                    104:
                    105: /*
                    106:  * Translate a kernel virtual address to a physical address using the
                    107:  * mapping information in kd->vm.  Returns the result in pa, and returns
1.8       simonb    108:  * the number of bytes that are contiguously available from this
1.15      wiz       109:  * physical address.  This routine is used only for crash dumps.
1.1       ragge     110:  */
                    111: int
                    112: _kvm_kvatop(kd, va, pa)
                    113:        kvm_t *kd;
                    114:        u_long va;
                    115:        u_long *pa;
                    116: {
1.12      matt      117:        u_long end;
1.1       ragge     118:
1.12      matt      119:        if (va < (u_long) KERNBASE) {
                    120:                _kvm_err(kd, 0, "invalid address (%lx<%lx)", va, (u_long) KERNBASE);
1.1       ragge     121:                return (0);
                    122:        }
                    123:
                    124:        end = kd->vmst->end;
                    125:        if (va >= end) {
1.12      matt      126:                _kvm_err(kd, 0, "invalid address (%lx>=%lx)", va, end);
1.1       ragge     127:                return (0);
                    128:        }
                    129:
1.12      matt      130:        *pa = (va - (u_long) KERNBASE);
1.1       ragge     131:        return (end - va);
                    132: }
1.4       ragge     133:
1.8       simonb    134: /*
1.15      wiz       135:  * Translate a physical address to a file-offset in the crash dump.
                    136:  * XXX - crash dump doesn't work anyway.
1.4       ragge     137:  */
                    138: off_t
                    139: _kvm_pa2off(kd, pa)
                    140:        kvm_t   *kd;
1.8       simonb    141:        u_long  pa;
1.4       ragge     142: {
                    143:        return(kd->dump_off + pa);
                    144: }
                    145:
1.5       gwr       146:
                    147: /*
                    148:  * Machine-dependent initialization for ALL open kvm descriptors,
                    149:  * not just those for a kernel crash dump.  Some architectures
                    150:  * have to deal with these NOT being constants!  (i.e. m68k)
                    151:  */
                    152: int
                    153: _kvm_mdopen(kd)
                    154:        kvm_t   *kd;
                    155: {
                    156:
                    157:        kd->usrstack = USRSTACK;
                    158:        kd->min_uva = VM_MIN_ADDRESS;
                    159:        kd->max_uva = VM_MAXUSER_ADDRESS;
                    160:
                    161:        return (0);
                    162: }

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