usr/src/cmd/mdb/common/mdb/mdb_kb_kvm.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*
  27  * Copyright (c) 2013, Joyent, Inc.  All rights reserved.
  28  */
  29
  30 /*
  31  * The default KVM backend, which simply calls directly into libkvm for all
  32  * operations.
  33  */
  34
  35 #include <mdb/mdb_kb.h>
  36 #include <mdb/mdb_target_impl.h>
  37
  38 #include <fcntl.h>
  39 #include <dlfcn.h>
  40 #include <kvm.h>
  41
  42 /*ARGSUSED*/
  43 static mdb_io_t *
  44 libkvm_sym_io(void *kvm, const char *ignored)
  45 {
  46         mdb_io_t *io;
  47         const char *symfile = kvm_namelist(kvm);
  48
  49         if ((io = mdb_fdio_create_path(NULL, symfile, O_RDONLY, 0)) == NULL)
  50                 mdb_warn("failed to open %s", symfile);
  51
  52         return (io);
  53 }
  54
  55 mdb_kb_ops_t *
  56 libkvm_kb_ops(void)
  57 {
  58         static mdb_kb_ops_t ops = {
  59                 .kb_open = (void *(*)())kvm_open,
  60                 .kb_close = (int (*)())kvm_close,
  61                 .kb_sym_io = libkvm_sym_io,
  62                 .kb_kread = (ssize_t (*)())kvm_kread,
  63                 .kb_kwrite = (ssize_t (*)())kvm_kwrite,
  64                 .kb_aread = (ssize_t (*)())kvm_aread,
  65                 .kb_awrite = (ssize_t (*)())kvm_awrite,
  66                 .kb_pread = (ssize_t (*)())kvm_pread,
  67                 .kb_pwrite = (ssize_t (*)())kvm_pwrite,
  68                 .kb_getmregs = (int (*)())mdb_tgt_notsup,
  69                 .kb_vtop = (uint64_t (*)())kvm_physaddr,
  70         };
  71         return (&ops);
  72 }