1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate /*
30*0Sstevel@tonic-gate * libctf open/close interposition layer
31*0Sstevel@tonic-gate *
32*0Sstevel@tonic-gate * This interposition layer serves two purposes. First, it allows the
33*0Sstevel@tonic-gate * introduction of a kmdb-specific implementation of ctf_open(). The normal
34*0Sstevel@tonic-gate * ctf_open() call open(2)s a file, and reads the CTF data directly from it.
35*0Sstevel@tonic-gate * No such facility is available in kmdb, as kmdb does not run in userland. We
36*0Sstevel@tonic-gate * can, however, observe that kmdb uses this interface only to read CTF data
37*0Sstevel@tonic-gate * from dmods. dmods, as viewed by kmdb, do have CTF data, but they have it
38*0Sstevel@tonic-gate * in a form that is best accessed by ctf_bufopen(). This interposition layer
39*0Sstevel@tonic-gate * allows us to translate ctf_open() calls into ctf_bufopen() calls.
40*0Sstevel@tonic-gate *
41*0Sstevel@tonic-gate * The second purpose of the interposition layer is to reduce the work needed
42*0Sstevel@tonic-gate * to call mdb_ctf_bufopen.
43*0Sstevel@tonic-gate */
44*0Sstevel@tonic-gate
45*0Sstevel@tonic-gate #include <sys/types.h>
46*0Sstevel@tonic-gate #include <sys/kobj.h>
47*0Sstevel@tonic-gate #include <libctf.h>
48*0Sstevel@tonic-gate #include <ctf_impl.h>
49*0Sstevel@tonic-gate
50*0Sstevel@tonic-gate #include <kmdb/kmdb_module.h>
51*0Sstevel@tonic-gate #include <mdb/mdb_ctf.h>
52*0Sstevel@tonic-gate #include <mdb/mdb_string.h>
53*0Sstevel@tonic-gate #include <mdb/mdb_debug.h>
54*0Sstevel@tonic-gate #include <mdb/mdb_err.h>
55*0Sstevel@tonic-gate #include <mdb/mdb.h>
56*0Sstevel@tonic-gate
57*0Sstevel@tonic-gate static kmdb_modctl_t *
mdb_ctf_name2ctl(const char * pathname)58*0Sstevel@tonic-gate mdb_ctf_name2ctl(const char *pathname)
59*0Sstevel@tonic-gate {
60*0Sstevel@tonic-gate mdb_var_t *v;
61*0Sstevel@tonic-gate
62*0Sstevel@tonic-gate if ((v = mdb_nv_lookup(&mdb.m_dmodctl, strbasename(pathname))) ==
63*0Sstevel@tonic-gate NULL)
64*0Sstevel@tonic-gate return (NULL);
65*0Sstevel@tonic-gate
66*0Sstevel@tonic-gate return ((kmdb_modctl_t *)MDB_NV_COOKIE(v));
67*0Sstevel@tonic-gate }
68*0Sstevel@tonic-gate
69*0Sstevel@tonic-gate ctf_file_t *
mdb_ctf_open(const char * pathname,int * errp)70*0Sstevel@tonic-gate mdb_ctf_open(const char *pathname, int *errp)
71*0Sstevel@tonic-gate {
72*0Sstevel@tonic-gate struct module *mp;
73*0Sstevel@tonic-gate kmdb_modctl_t *kmc;
74*0Sstevel@tonic-gate ctf_file_t *ctfp;
75*0Sstevel@tonic-gate
76*0Sstevel@tonic-gate if ((kmc = mdb_ctf_name2ctl(pathname)) == NULL) {
77*0Sstevel@tonic-gate if (errp != NULL)
78*0Sstevel@tonic-gate *errp = ENOENT;
79*0Sstevel@tonic-gate return (NULL);
80*0Sstevel@tonic-gate }
81*0Sstevel@tonic-gate
82*0Sstevel@tonic-gate mp = kmc->kmc_modctl->mod_mp;
83*0Sstevel@tonic-gate if (mp->ctfdata == NULL) {
84*0Sstevel@tonic-gate if (errp != NULL)
85*0Sstevel@tonic-gate *errp = ECTF_NOCTFDATA;
86*0Sstevel@tonic-gate return (NULL);
87*0Sstevel@tonic-gate }
88*0Sstevel@tonic-gate
89*0Sstevel@tonic-gate if ((ctfp = mdb_ctf_bufopen(mp->ctfdata, mp->ctfsize, mp->symtbl,
90*0Sstevel@tonic-gate mp->symhdr, mp->strings, mp->strhdr, errp)) == NULL)
91*0Sstevel@tonic-gate return (NULL);
92*0Sstevel@tonic-gate
93*0Sstevel@tonic-gate mdb_dprintf(MDB_DBG_MODULE, "loaded %lu bytes of CTF data for %s\n",
94*0Sstevel@tonic-gate (ulong_t)mp->ctfsize, kmc->kmc_modname);
95*0Sstevel@tonic-gate
96*0Sstevel@tonic-gate return (ctfp);
97*0Sstevel@tonic-gate }
98*0Sstevel@tonic-gate
99*0Sstevel@tonic-gate void
mdb_ctf_close(ctf_file_t * fp)100*0Sstevel@tonic-gate mdb_ctf_close(ctf_file_t *fp)
101*0Sstevel@tonic-gate {
102*0Sstevel@tonic-gate ctf_close(fp);
103*0Sstevel@tonic-gate }
104