12223 Update libdwarf to libdwarf-20200612

Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Dan McDonald <danmcd@joyent.com>

1 files changed, 83 insertions, 0 deletions

diff --git a/usr/src/lib/libdwarf/common/dwarf_stringsection.c b/usr/src/lib/libdwarf/common/dwarf_stringsection.c
new file mode 100644
index 0000000000..06c8224ae1
--- /dev/null
+++ b/usr/src/lib/libdwarf/common/dwarf_stringsection.c
@@ -0,0 +1,83 @@
+/*
+  Copyright (C) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
+  Portions Copyright (C) 2009-2018 David Anderson. All Rights Reserved.
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms of version 2.1 of the GNU Lesser General Public License
+  as published by the Free Software Foundation.
+
+  This program is distributed in the hope that it would be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+  Further, this software is distributed without any warranty that it is
+  free of the rightful claim of any third person regarding infringement
+  or the like.  Any license provided herein, whether implied or
+  otherwise, applies only to this software file.  Patent licenses, if
+  any, provided herein do not apply to combinations of this program with
+  other software, or any other product whatsoever.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this program; if not, write the Free Software
+  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston MA 02110-1301,
+  USA.
+
+*/
+
+#include "config.h"
+#include "dwarf_incl.h"
+#include "dwarf_error.h"
+#include "dwarf_util.h"
+
+int
+dwarf_get_str(Dwarf_Debug dbg,
+   Dwarf_Off offset,
+   char **string,
+   Dwarf_Signed * returned_str_len, Dwarf_Error * error)
+{
+    int res = DW_DLV_ERROR;
+    void *secptr = 0;
+    void *begin = 0;
+    void *end = 0;
+
+    if (dbg == NULL) {
+        _dwarf_error(NULL, error, DW_DLE_DBG_NULL);
+        return (DW_DLV_ERROR);
+    }
+
+    if (offset == dbg->de_debug_str.dss_size) {
+        /*  Normal (if we've iterated thru the set of strings using
+            dwarf_get_str and are at the end). */
+        return DW_DLV_NO_ENTRY;
+    }
+    if (offset > dbg->de_debug_str.dss_size) {
+        _dwarf_error(dbg, error, DW_DLE_DEBUG_STR_OFFSET_BAD);
+        return (DW_DLV_ERROR);
+    }
+
+    if (string == NULL) {
+        _dwarf_error(dbg, error, DW_DLE_STRING_PTR_NULL);
+        return (DW_DLV_ERROR);
+    }
+
+    res = _dwarf_load_section(dbg, &dbg->de_debug_str,error);
+    if (res != DW_DLV_OK) {
+        return res;
+    }
+    if (!dbg->de_debug_str.dss_size) {
+        return (DW_DLV_NO_ENTRY);
+    }
+    secptr =dbg->de_debug_str.dss_data;
+    begin = (char *)secptr + offset;
+    end =   (char *)secptr + dbg->de_debug_str.dss_size;
+
+    res = _dwarf_check_string_valid(dbg,secptr,begin,end,
+        DW_DLE_DEBUG_STR_OFFSET_BAD,error);
+    if (res != DW_DLV_OK) {
+        return res;
+    }
+
+    *string = (char *) begin;
+    *returned_str_len = strlen(*string);
+    return DW_DLV_OK;
+}