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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
* Copyright (c) 2015, Joyent, Inc.
*/
/*
* libctf open/close interposition layer
*
* This interposition layer serves two purposes. First, it allows the
* introduction of a kmdb-specific implementation of ctf_open(). The normal
* ctf_open() call open(2)s a file, and reads the CTF data directly from it.
* No such facility is available in kmdb, as kmdb does not run in userland. We
* can, however, observe that kmdb uses this interface only to read CTF data
* from dmods. dmods, as viewed by kmdb, do have CTF data, but they have it
* in a form that is best accessed by ctf_bufopen(). This interposition layer
* allows us to translate ctf_open() calls into ctf_bufopen() calls.
*
* The second purpose of the interposition layer is to reduce the work needed
* to call mdb_ctf_bufopen.
*/
#include <sys/types.h>
#include <sys/kobj.h>
#include <libctf.h>
#include <ctf_impl.h>
#include <kmdb/kmdb_module.h>
#include <mdb/mdb_ctf.h>
#include <mdb/mdb_string.h>
#include <mdb/mdb_debug.h>
#include <mdb/mdb_err.h>
#include <mdb/mdb.h>
static kmdb_modctl_t *
mdb_ctf_name2ctl(const char *pathname)
{
mdb_var_t *v;
if ((v = mdb_nv_lookup(&mdb.m_dmodctl, strbasename(pathname))) ==
NULL)
return (NULL);
return ((kmdb_modctl_t *)MDB_NV_COOKIE(v));
}
ctf_file_t *
mdb_ctf_open(const char *pathname, int *errp)
{
struct module *mp;
kmdb_modctl_t *kmc;
ctf_file_t *ctfp;
if ((kmc = mdb_ctf_name2ctl(pathname)) == NULL) {
if (errp != NULL)
*errp = ENOENT;
return (NULL);
}
mp = kmc->kmc_modctl->mod_mp;
if (mp->ctfdata == NULL) {
if (errp != NULL)
*errp = ECTF_NOCTFDATA;
return (NULL);
}
if ((ctfp = mdb_ctf_bufopen(mp->ctfdata, mp->ctfsize, mp->symtbl,
mp->symhdr, mp->strings, mp->strhdr, errp)) == NULL)
return (NULL);
mdb_dprintf(MDB_DBG_MODULE, "loaded %lu bytes of CTF data for %s\n",
(ulong_t)mp->ctfsize, kmc->kmc_modname);
return (ctfp);
}
void
mdb_ctf_close(ctf_file_t *fp)
{
ctf_close(fp);
}
/*ARGSUSED*/
int
mdb_ctf_write(const char *file, ctf_file_t *fp)
{
return (ENOTSUP);
}
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