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, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 #ifdef HAVE_NBTOOL_CONFIG_H
23 #include "nbtool_config.h"
24 #endif
25 /*
26 * Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved.
27 * Use is subject to license terms.
28 */
29
30 #pragma ident "%Z%%M% %I% %E% SMI"
31
32 #include <ctf_impl.h>
33
34 static int
extract_label_info(ctf_file_t * fp,const ctf_lblent_t ** ctl,uint_t * num_labels)35 extract_label_info(ctf_file_t *fp, const ctf_lblent_t **ctl, uint_t *num_labels)
36 {
37 const ctf_header_t *h;
38
39 /*
40 * Labels are only supported in V2 or later
41 */
42 if (fp->ctf_version < CTF_VERSION_2)
43 return (ctf_set_errno(fp, ECTF_NOTSUP));
44
45 h = (const ctf_header_t *)fp->ctf_data.cts_data;
46
47 /* LINTED - pointer alignment */
48 *ctl = (const ctf_lblent_t *)(fp->ctf_buf + h->cth_lbloff);
49 *num_labels = (h->cth_objtoff - h->cth_lbloff) / sizeof (ctf_lblent_t);
50
51 return (0);
52 }
53
54 /*
55 * Returns the topmost label, or NULL if any errors are encountered
56 */
57 const char *
ctf_label_topmost(ctf_file_t * fp)58 ctf_label_topmost(ctf_file_t *fp)
59 {
60 const ctf_lblent_t *ctlp = NULL; // XXX: gcc
61 const char *s;
62 uint_t num_labels = 0; // XXX: gcc
63
64 if (extract_label_info(fp, &ctlp, &num_labels) == CTF_ERR)
65 return (NULL); /* errno is set */
66
67 if (num_labels == 0) {
68 (void) ctf_set_errno(fp, ECTF_NOLABELDATA);
69 return (NULL);
70 }
71
72 if ((s = ctf_strraw(fp, (ctlp + num_labels - 1)->ctl_label)) == NULL)
73 (void) ctf_set_errno(fp, ECTF_CORRUPT);
74
75 return (s);
76 }
77
78 /*
79 * Iterate over all labels. We pass the label string and the lblinfo_t struct
80 * to the specified callback function.
81 */
82 int
ctf_label_iter(ctf_file_t * fp,ctf_label_f * func,void * arg)83 ctf_label_iter(ctf_file_t *fp, ctf_label_f *func, void *arg)
84 {
85 const ctf_lblent_t *ctlp = NULL; // XXX: gcc
86 uint_t i, num_labels = 0; // XXX: gcc
87 ctf_lblinfo_t linfo;
88 const char *lname;
89 int rc;
90
91 if (extract_label_info(fp, &ctlp, &num_labels) == CTF_ERR)
92 return (CTF_ERR); /* errno is set */
93
94 if (num_labels == 0)
95 return (ctf_set_errno(fp, ECTF_NOLABELDATA));
96
97 for (i = 0; i < num_labels; i++, ctlp++) {
98 if ((lname = ctf_strraw(fp, ctlp->ctl_label)) == NULL) {
99 ctf_dprintf("failed to decode label %u with "
100 "typeidx %u\n", ctlp->ctl_label, ctlp->ctl_typeidx);
101 return (ctf_set_errno(fp, ECTF_CORRUPT));
102 }
103
104 linfo.ctb_typeidx = ctlp->ctl_typeidx;
105 if ((rc = func(lname, &linfo, arg)) != 0)
106 return (rc);
107 }
108
109 return (0);
110 }
111
112 typedef struct linfo_cb_arg {
113 const char *lca_name; /* Label we want to retrieve info for */
114 ctf_lblinfo_t *lca_info; /* Where to store the info about the label */
115 } linfo_cb_arg_t;
116
117 static int
label_info_cb(const char * lname,const ctf_lblinfo_t * linfo,void * arg)118 label_info_cb(const char *lname, const ctf_lblinfo_t *linfo, void *arg)
119 {
120 /*
121 * If lname matches the label we are looking for, copy the
122 * lblinfo_t struct for the caller.
123 */
124 if (strcmp(lname, ((linfo_cb_arg_t *)arg)->lca_name) == 0) {
125 /*
126 * Allow caller not to allocate storage to test if label exists
127 */
128 if (((linfo_cb_arg_t *)arg)->lca_info != NULL)
129 bcopy(linfo, ((linfo_cb_arg_t *)arg)->lca_info,
130 sizeof (ctf_lblinfo_t));
131 return (1); /* Indicate we found a match */
132 }
133
134 return (0);
135 }
136
137 /*
138 * Retrieve information about the label with name "lname"
139 */
140 int
ctf_label_info(ctf_file_t * fp,const char * lname,ctf_lblinfo_t * linfo)141 ctf_label_info(ctf_file_t *fp, const char *lname, ctf_lblinfo_t *linfo)
142 {
143 linfo_cb_arg_t cb_arg;
144 int rc;
145
146 cb_arg.lca_name = lname;
147 cb_arg.lca_info = linfo;
148
149 if ((rc = ctf_label_iter(fp, label_info_cb, &cb_arg)) == CTF_ERR)
150 return (rc);
151
152 if (rc != 1)
153 return (ctf_set_errno(fp, ECTF_NOLABEL));
154
155 return (0);
156 }
157