--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/utilities/elfSymbolTable.cpp	Sat Dec 11 13:20:56 2010 -0500
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+
+#ifndef _WINDOWS
+
+#include "memory/allocation.inline.hpp"
+#include "utilities/elfSymbolTable.hpp"
+
+ElfSymbolTable::ElfSymbolTable(FILE* file, Elf_Shdr shdr) {
+  assert(file, "null file handle");
+  m_symbols = NULL;
+  m_next = NULL;
+  m_file = file;
+  m_status = Decoder::no_error;
+
+  // try to load the string table
+  long cur_offset = ftell(file);
+  if (cur_offset != -1) {
+    m_symbols = (Elf_Sym*)NEW_C_HEAP_ARRAY(char, shdr.sh_size);
+    if (m_symbols) {
+      if (fseek(file, shdr.sh_offset, SEEK_SET) ||
+        fread((void*)m_symbols, shdr.sh_size, 1, file) != 1 ||
+        fseek(file, cur_offset, SEEK_SET)) {
+        m_status = Decoder::file_invalid;
+        FREE_C_HEAP_ARRAY(char, m_symbols);
+        m_symbols = NULL;
+      }
+    }
+    if (m_status == Decoder::no_error) {
+      memcpy(&m_shdr, &shdr, sizeof(Elf_Shdr));
+    }
+  } else {
+    m_status = Decoder::file_invalid;
+  }
+}
+
+ElfSymbolTable::~ElfSymbolTable() {
+  if (m_symbols != NULL) {
+    FREE_C_HEAP_ARRAY(char, m_symbols);
+  }
+
+  if (m_next != NULL) {
+    delete m_next;
+  }
+}
+
+Decoder::decoder_status ElfSymbolTable::lookup(address addr, int* stringtableIndex, int* posIndex, int* offset) {
+  assert(stringtableIndex, "null string table index pointer");
+  assert(posIndex, "null string table offset pointer");
+  assert(offset, "null offset pointer");
+
+  if (m_status != Decoder::no_error) {
+    return m_status;
+  }
+
+  address pc = 0;
+  size_t  sym_size = sizeof(Elf_Sym);
+  assert((m_shdr.sh_size % sym_size) == 0, "check size");
+  int count = m_shdr.sh_size / sym_size;
+  if (m_symbols != NULL) {
+    for (int index = 0; index < count; index ++) {
+      if (STT_FUNC == ELF_ST_TYPE(m_symbols[index].st_info)) {
+        address sym_addr = (address)m_symbols[index].st_value;
+        if (sym_addr < addr && (addr - sym_addr) < *offset) {
+          pc = (address)m_symbols[index].st_value;
+          *offset = (int)(addr - pc);
+          *posIndex = m_symbols[index].st_name;
+          *stringtableIndex = m_shdr.sh_link;
+        }
+      }
+    }
+  } else {
+    long cur_pos;
+    if ((cur_pos = ftell(m_file)) == -1 ||
+      fseek(m_file, m_shdr.sh_offset, SEEK_SET)) {
+      m_status = Decoder::file_invalid;
+      return m_status;
+    }
+
+    Elf_Sym sym;
+    for (int index = 0; index < count; index ++) {
+      if (fread(&sym, sym_size, 1, m_file) == 1) {
+        if (STT_FUNC == ELF_ST_TYPE(sym.st_info)) {
+          address sym_addr = (address)sym.st_value;
+          if (sym_addr < addr && (addr - sym_addr) < *offset) {
+            pc = (address)sym.st_value;
+            *offset = (int)(addr - pc);
+            *posIndex = sym.st_name;
+            *stringtableIndex = m_shdr.sh_link;
+          }
+        }
+      } else {
+        m_status = Decoder::file_invalid;
+        return m_status;
+      }
+    }
+    fseek(m_file, cur_pos, SEEK_SET);
+  }
+  return m_status;
+}
+
+#endif // _WINDOWS