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authorJohn Birrell <jb@FreeBSD.org>2008-04-25 23:33:18 +0000
committerJohn Birrell <jb@FreeBSD.org>2008-04-25 23:33:18 +0000
commitd876124d6ae9d56da5b4ff4c6015efd1d0c9222a (patch)
treee6cfdef2a8b9488b25517d80411d703ccb765e26 /cddl/contrib/opensolaris/common/ctf/ctf_labels.c
parent2056b4037cdba1def880066fab7cca98df5b4d86 (diff)
parent2de84d2572206157cf33d1fb75463eeb42ae8e42 (diff)
downloadsrc-d876124d6ae9d56da5b4ff4c6015efd1d0c9222a.tar.gz
src-d876124d6ae9d56da5b4ff4c6015efd1d0c9222a.zip
This commit was generated by cvs2svn to compensate for changes in r178525,
which included commits to RCS files with non-trunk default branches.
Notes
Notes: svn path=/head/; revision=178526
Diffstat (limited to 'cddl/contrib/opensolaris/common/ctf/ctf_labels.c')
-rw-r--r--cddl/contrib/opensolaris/common/ctf/ctf_labels.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/common/ctf/ctf_labels.c b/cddl/contrib/opensolaris/common/ctf/ctf_labels.c
new file mode 100644
index 000000000000..ddcb1d330202
--- /dev/null
+++ b/cddl/contrib/opensolaris/common/ctf/ctf_labels.c
@@ -0,0 +1,153 @@
+/*
+ * 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 2002-2003 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident "%Z%%M% %I% %E% SMI"
+
+#include <ctf_impl.h>
+
+static int
+extract_label_info(ctf_file_t *fp, const ctf_lblent_t **ctl, uint_t *num_labels)
+{
+ const ctf_header_t *h;
+
+ /*
+ * Labels are only supported in V2 or later
+ */
+ if (fp->ctf_version < CTF_VERSION_2)
+ return (ctf_set_errno(fp, ECTF_NOTSUP));
+
+ h = (const ctf_header_t *)fp->ctf_data.cts_data;
+
+ /* LINTED - pointer alignment */
+ *ctl = (const ctf_lblent_t *)(fp->ctf_buf + h->cth_lbloff);
+ *num_labels = (h->cth_objtoff - h->cth_lbloff) / sizeof (ctf_lblent_t);
+
+ return (0);
+}
+
+/*
+ * Returns the topmost label, or NULL if any errors are encountered
+ */
+const char *
+ctf_label_topmost(ctf_file_t *fp)
+{
+ const ctf_lblent_t *ctlp;
+ const char *s;
+ uint_t num_labels;
+
+ if (extract_label_info(fp, &ctlp, &num_labels) == CTF_ERR)
+ return (NULL); /* errno is set */
+
+ if (num_labels == 0) {
+ (void) ctf_set_errno(fp, ECTF_NOLABELDATA);
+ return (NULL);
+ }
+
+ if ((s = ctf_strraw(fp, (ctlp + num_labels - 1)->ctl_label)) == NULL)
+ (void) ctf_set_errno(fp, ECTF_CORRUPT);
+
+ return (s);
+}
+
+/*
+ * Iterate over all labels. We pass the label string and the lblinfo_t struct
+ * to the specified callback function.
+ */
+int
+ctf_label_iter(ctf_file_t *fp, ctf_label_f *func, void *arg)
+{
+ const ctf_lblent_t *ctlp;
+ uint_t i, num_labels;
+ ctf_lblinfo_t linfo;
+ const char *lname;
+ int rc;
+
+ if (extract_label_info(fp, &ctlp, &num_labels) == CTF_ERR)
+ return (CTF_ERR); /* errno is set */
+
+ if (num_labels == 0)
+ return (ctf_set_errno(fp, ECTF_NOLABELDATA));
+
+ for (i = 0; i < num_labels; i++, ctlp++) {
+ if ((lname = ctf_strraw(fp, ctlp->ctl_label)) == NULL) {
+ ctf_dprintf("failed to decode label %u with "
+ "typeidx %u\n", ctlp->ctl_label, ctlp->ctl_typeidx);
+ return (ctf_set_errno(fp, ECTF_CORRUPT));
+ }
+
+ linfo.ctb_typeidx = ctlp->ctl_typeidx;
+ if ((rc = func(lname, &linfo, arg)) != 0)
+ return (rc);
+ }
+
+ return (0);
+}
+
+typedef struct linfo_cb_arg {
+ const char *lca_name; /* Label we want to retrieve info for */
+ ctf_lblinfo_t *lca_info; /* Where to store the info about the label */
+} linfo_cb_arg_t;
+
+static int
+label_info_cb(const char *lname, const ctf_lblinfo_t *linfo, void *arg)
+{
+ /*
+ * If lname matches the label we are looking for, copy the
+ * lblinfo_t struct for the caller.
+ */
+ if (strcmp(lname, ((linfo_cb_arg_t *)arg)->lca_name) == 0) {
+ /*
+ * Allow caller not to allocate storage to test if label exists
+ */
+ if (((linfo_cb_arg_t *)arg)->lca_info != NULL)
+ bcopy(linfo, ((linfo_cb_arg_t *)arg)->lca_info,
+ sizeof (ctf_lblinfo_t));
+ return (1); /* Indicate we found a match */
+ }
+
+ return (0);
+}
+
+/*
+ * Retrieve information about the label with name "lname"
+ */
+int
+ctf_label_info(ctf_file_t *fp, const char *lname, ctf_lblinfo_t *linfo)
+{
+ linfo_cb_arg_t cb_arg;
+ int rc;
+
+ cb_arg.lca_name = lname;
+ cb_arg.lca_info = linfo;
+
+ if ((rc = ctf_label_iter(fp, label_info_cb, &cb_arg)) == CTF_ERR)
+ return (rc);
+
+ if (rc != 1)
+ return (ctf_set_errno(fp, ECTF_NOLABEL));
+
+ return (0);
+}