154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#pragma ident "%Z%%M% %I% %E% SMI"
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#include <ctf_impl.h>
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static int
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extract_label_info(ctf_file_t *fp, const ctf_lblent_t **ctl, uint_t *num_labels)
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{
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const ctf_header_t *h;
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/*
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* Labels are only supported in V2 or later
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*/
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if (fp->ctf_version < CTF_VERSION_2)
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return (ctf_set_errno(fp, ECTF_NOTSUP));
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h = (const ctf_header_t *)fp->ctf_data.cts_data;
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/* LINTED - pointer alignment */
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*ctl = (const ctf_lblent_t *)(fp->ctf_buf + h->cth_lbloff);
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*num_labels = (h->cth_objtoff - h->cth_lbloff) / sizeof (ctf_lblent_t);
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return (0);
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}
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/*
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* Returns the topmost label, or NULL if any errors are encountered
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*/
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const char *
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ctf_label_topmost(ctf_file_t *fp)
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{
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const ctf_lblent_t *ctlp;
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const char *s;
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uint_t num_labels;
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if (extract_label_info(fp, &ctlp, &num_labels) == CTF_ERR)
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return (NULL); /* errno is set */
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if (num_labels == 0) {
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(void) ctf_set_errno(fp, ECTF_NOLABELDATA);
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return (NULL);
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}
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if ((s = ctf_strraw(fp, (ctlp + num_labels - 1)->ctl_label)) == NULL)
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(void) ctf_set_errno(fp, ECTF_CORRUPT);
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return (s);
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}
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/*
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* Iterate over all labels. We pass the label string and the lblinfo_t struct
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* to the specified callback function.
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*/
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int
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ctf_label_iter(ctf_file_t *fp, ctf_label_f *func, void *arg)
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{
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const ctf_lblent_t *ctlp;
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uint_t i, num_labels;
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ctf_lblinfo_t linfo;
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const char *lname;
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int rc;
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if (extract_label_info(fp, &ctlp, &num_labels) == CTF_ERR)
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return (CTF_ERR); /* errno is set */
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if (num_labels == 0)
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return (ctf_set_errno(fp, ECTF_NOLABELDATA));
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for (i = 0; i < num_labels; i++, ctlp++) {
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if ((lname = ctf_strraw(fp, ctlp->ctl_label)) == NULL) {
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ctf_dprintf("failed to decode label %u with "
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"typeidx %u\n", ctlp->ctl_label, ctlp->ctl_typeidx);
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return (ctf_set_errno(fp, ECTF_CORRUPT));
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}
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linfo.ctb_typeidx = ctlp->ctl_typeidx;
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if ((rc = func(lname, &linfo, arg)) != 0)
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return (rc);
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}
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return (0);
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}
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typedef struct linfo_cb_arg {
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const char *lca_name; /* Label we want to retrieve info for */
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ctf_lblinfo_t *lca_info; /* Where to store the info about the label */
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} linfo_cb_arg_t;
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static int
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label_info_cb(const char *lname, const ctf_lblinfo_t *linfo, void *arg)
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{
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/*
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* If lname matches the label we are looking for, copy the
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* lblinfo_t struct for the caller.
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*/
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if (strcmp(lname, ((linfo_cb_arg_t *)arg)->lca_name) == 0) {
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/*
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* Allow caller not to allocate storage to test if label exists
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*/
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if (((linfo_cb_arg_t *)arg)->lca_info != NULL)
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bcopy(linfo, ((linfo_cb_arg_t *)arg)->lca_info,
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sizeof (ctf_lblinfo_t));
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return (1); /* Indicate we found a match */
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}
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return (0);
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}
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/*
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* Retrieve information about the label with name "lname"
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*/
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int
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ctf_label_info(ctf_file_t *fp, const char *lname, ctf_lblinfo_t *linfo)
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{
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linfo_cb_arg_t cb_arg;
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int rc;
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cb_arg.lca_name = lname;
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cb_arg.lca_info = linfo;
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if ((rc = ctf_label_iter(fp, label_info_cb, &cb_arg)) == CTF_ERR)
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return (rc);
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if (rc != 1)
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return (ctf_set_errno(fp, ECTF_NOLABEL));
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return (0);
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}
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