Object-elf.C

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/*
 * See the dyninst/COPYRIGHT file for copyright information.
 * 
 * We provide the Paradyn Tools (below described as "Paradyn")
 * on an AS IS basis, and do not warrant its validity or performance.
 * We reserve the right to update, modify, or discontinue this
 * software at any time.  We shall have no obligation to supply such
 * updates or modifications or any other form of support to you.
 * 
 * By your use of Paradyn, you understand and agree that we (or any
 * other person or entity with proprietary rights in Paradyn) are
 * under no obligation to provide either maintenance services,
 * update services, notices of latent defects, or correction of
 * defects for Paradyn.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/************************************************************************
 * $Id: Object-elf.C,v 1.54 2008/11/03 15:19:25 jaw Exp $
 * Object-elf.C: Object class for ELF file format
 ************************************************************************/

#include "Type.h"
#include "Variable.h"
#include "Symbol.h"
#include "Symtab.h"
#include "Object.h"

#include "emitElf.h"
#include "Module.h"
#include "Aggregate.h"
#include "Function.h"

#include "debug.h"

#include "dwarf/h/dwarfHandle.h"

#if defined(x86_64_unknown_linux2_4) || \
    defined(ppc64_linux) || \
    (defined(os_freebsd) && defined(arch_x86_64))
#include "emitElf-64.h"
#endif

#include "dwarfWalker.h"

using namespace Dyninst;
using namespace Dyninst::SymtabAPI;
using namespace Dyninst::Dwarf;
using namespace std;

#if !defined(_Object_elf_h_)
#error "Object-elf.h not #included"
#endif

#include <elf.h>
#include <stdio.h>
#include <algorithm>

#if defined(USES_DWARF_DEBUG)
#include "dwarf.h"
#include "libdwarf.h"
#endif

//#include "symutil.h"
#include "common/h/pathName.h"
#include "Collections.h"
#if defined(TIMED_PARSE)
#include <sys/time.h>
#endif
#include <iostream>
#include <iomanip>

#include <fstream>
#include <sys/stat.h>

#include <boost/assign/list_of.hpp>
#include <boost/assign/std/set.hpp>

#include "dynutil/h/SymReader.h"

using namespace boost::assign;

#include <libgen.h>

// add some space to avoid looking for functions in data regions
#define EXTRA_SPACE 8

bool Object::truncateLineFilenames = true;
    
string symt_current_func_name;
string symt_current_mangled_func_name;
Symbol *symt_current_func = NULL;

std::vector<Symbol *> opdsymbols_;

extern void print_symbols( std::vector< Symbol *>& allsymbols );
extern void print_symbol_map( dyn_hash_map< std::string, std::vector< Symbol *> > *symbols);

void (*dwarf_err_func)(const char *);   // error callback for dwarf errors

static bool pdelf_check_ehdr(Elf_X &elf)
{
  // Elf header integrity check

  // This implies a valid header is a header for an executable, a shared object
  // or a relocatable file (e.g .o) and it either has section headers or program headers

  return ( (elf.e_type() == ET_EXEC || elf.e_type() == ET_DYN || elf.e_type() == ET_REL ) &&
           (   ((elf.e_shoff() != 0) && (elf.e_shnum() != 0)) 
            || ((elf.e_phoff() != 0) && (elf.e_phnum() != 0))
           )
         );
}

const char *pdelf_get_shnames(Elf_X *elf)
{
  const char *result = NULL;
  size_t shstrndx = elf->e_shstrndx();

  Elf_X_Shdr &shstrscn = elf->get_shdr(shstrndx);
  if (shstrscn.isValid()) {
    Elf_X_Data shstrdata = shstrscn.get_data();
    if (shstrdata.isValid())
      result = shstrdata.get_string();
  }
  return result;
}

//
// SectionHeaderSortFunction
// 
// Compare function for use with the Vector<T> sort method.
//
struct  SectionHeaderSortFunction: public binary_function<Elf_X_Shdr *, Elf_X_Shdr *, bool> 
{
  bool operator()(Elf_X_Shdr *hdr1, Elf_X_Shdr *hdr2) {
    return (hdr1->sh_addr() < hdr2->sh_addr()); 
  }
};

Region::perm_t getSegmentPerms(unsigned long flags){
  if(flags == 7)
    return Region::RP_RWX;
  else if(flags == 6)
    return Region::RP_RW;
  else if(flags == 5)
    return Region::RP_RX;
  else
    return Region::RP_R;
}

Region::RegionType getSegmentType(unsigned long type, unsigned long flags)
{
  if(type == PT_DYNAMIC)
    return Region::RT_DYNAMIC;
  if(flags == 7)
    return Region::RT_TEXTDATA;
  if(flags == 5)
    return Region::RT_TEXT;
  if(flags == 6)
    return Region::RT_DATA;
  return Region::RT_OTHER;
}

/* binary search to find the section starting at a particular address */
Elf_X_Shdr *Object::getRegionHdrByAddr(Offset addr) 
{
  unsigned end = allRegionHdrs.size() - 1, start = 0;
  unsigned mid = 0; 
  while(start < end) {
    mid = start + (end-start)/2;
    if(allRegionHdrs[mid]->sh_addr() == addr)
      return allRegionHdrs[mid];
    else if(allRegionHdrs[mid]->sh_addr() < addr)
      start = mid + 1;
    else
      end = mid;
  }
  if(allRegionHdrs[start]->sh_addr() == addr)
    return allRegionHdrs[start];
  return NULL;
}

/* binary search to find the index into the RegionHdrs vector
   of the section starting at a partidular address*/
int Object::getRegionHdrIndexByAddr(Offset addr) 
{
  int end = allRegionHdrs.size() - 1, start = 0;
  int mid = 0; 
  while(start < end) {
    mid = start + (end-start)/2;
    if(allRegionHdrs[mid]->sh_addr() == addr)
      return mid;
    else if(allRegionHdrs[mid]->sh_addr() < addr)
      start = mid + 1;
    else
      end = mid;
  }
  if(allRegionHdrs[start]->sh_addr() == addr)
    return start;
  return -1;
}

Elf_X_Shdr *Object::getRegionHdrByIndex(unsigned index) 
{
  if (index >= allRegionHdrs.size())
    return NULL;
  return allRegionHdrs[index];
}

/* Check if there is a section which belongs to the segment and update permissions of that section.
 * Return value indicates whether the segment has to be added to the list of regions*/
bool Object::isRegionPresent(Offset segmentStart, Offset segmentSize, unsigned segPerms){
  bool present = false;
  for(unsigned i = 0; i < regions_.size() ;i++){
    if((regions_[i]->getDiskOffset() >= segmentStart) && 
       ((regions_[i]->getDiskOffset()+regions_[i]->getDiskSize()) <= (segmentStart+segmentSize))){
      present = true;
      regions_[i]->setRegionPermissions(getSegmentPerms(segPerms));
    }

  }
  return present;
}

Region::perm_t getRegionPerms(unsigned long flags){
  if((flags & SHF_WRITE) && !(flags & SHF_EXECINSTR))
    return Region::RP_RW;
  else if(!(flags & SHF_WRITE) && (flags & SHF_EXECINSTR))
    return Region::RP_RX;
  else if((flags & SHF_WRITE) && (flags & SHF_EXECINSTR))
    return Region::RP_RWX;
  else
    return Region::RP_R;
}

Region::RegionType getRegionType(unsigned long type, unsigned long flags, const char *reg_name){
  switch(type){
  case SHT_SYMTAB:
  case SHT_DYNSYM:
    return Region::RT_SYMTAB;
  case SHT_STRTAB:
    return Region::RT_STRTAB;
  case SHT_REL:
    return Region::RT_REL;
  case SHT_RELA:
    return Region::RT_RELA;
  case SHT_NOBITS:
     //Darn it, Linux/PPC has the PLT as a NOBITS.  Can't just default
     // call this bss
     if (strcmp(reg_name, ".plt") == 0)
        return Region::RT_OTHER;
     else
        return Region::RT_BSS;
  case SHT_PROGBITS:
    if((flags & SHF_EXECINSTR) && (flags & SHF_WRITE))
      return Region::RT_TEXTDATA;
    else if(flags & SHF_EXECINSTR)
      return Region::RT_TEXT;
    else
      return Region::RT_DATA;
  case SHT_DYNAMIC:
    return Region::RT_DYNAMIC;
  case SHT_HASH:
    return Region::RT_HASH;
  case SHT_GNU_versym:
    return Region::RT_SYMVERSIONS;
  case SHT_GNU_verdef:
    return Region::RT_SYMVERDEF;
  case SHT_GNU_verneed:
    return Region::RT_SYMVERNEEDED;
  default:
    return Region::RT_OTHER;
  }
}

static Region::RegionType getRelTypeByElfMachine(Elf_X *localHdr) {
    Region::RegionType ret;
    switch(localHdr->e_machine()) {
        case EM_SPARC:
        case EM_SPARC32PLUS:
        case EM_SPARCV9:
        case EM_PPC:
        case EM_PPC64:
        case EM_X86_64:
        case EM_IA_64:
            ret = Region::RT_RELA;
            break;
        default:
            ret = Region::RT_REL;
            break;
    }
    return ret;
}

const char* EDITED_TEXT_NAME = ".edited.text";
// const char* INIT_NAME        = ".init";
const char *INTERP_NAME      = ".interp";
const char* FINI_NAME        = ".fini";
const char* TEXT_NAME        = ".text";
const char* BSS_NAME         = ".bss";
const char* SYMTAB_NAME      = ".symtab";
const char* STRTAB_NAME      = ".strtab";
const char* STAB_NAME        = ".stab";
const char* STABSTR_NAME     = ".stabstr";
const char* STAB_INDX_NAME   = ".stab.index";
const char* STABSTR_INDX_NAME= ".stab.indexstr";
const char* COMMENT_NAME= ".comment";
const char* OPD_NAME         = ".opd"; // PPC64 Official Procedure Descriptors
// sections from dynamic executables and shared objects
const char* PLT_NAME         = ".plt";
#if defined(os_vxworks)
const char* REL_PLT_NAME     = ".rela.text";
#else
const char* REL_PLT_NAME     = ".rela.plt"; // sparc-solaris
#endif  
const char* REL_PLT_NAME2    = ".rel.plt";  // x86-solaris
const char* GOT_NAME         = ".got";
const char* DYNSYM_NAME      = ".dynsym";
const char* DYNSTR_NAME      = ".dynstr";
const char* DATA_NAME        = ".data";
const char* RO_DATA_NAME     = ".ro_data";  // mips
const char* DYNAMIC_NAME     = ".dynamic";
const char* EH_FRAME_NAME    = ".eh_frame";
const char* EXCEPT_NAME      = ".gcc_except_table";
const char* EXCEPT_NAME_ALT  = ".except_table";

set<string> debugInfoSections = list_of(string(SYMTAB_NAME))
  (string(STRTAB_NAME));

// loaded_elf(): populate elf section pointers
// for EEL rewritten code, also populate "code_*_" members
bool Object::loaded_elf(Offset& txtaddr, Offset& dataddr,
                        Elf_X_Shdr* &bssscnp,
                        Elf_X_Shdr*& symscnp, Elf_X_Shdr*& strscnp, 
                        Elf_X_Shdr*& stabscnp, Elf_X_Shdr*& stabstrscnp, 
                        Elf_X_Shdr*& stabs_indxcnp, Elf_X_Shdr*& stabstrs_indxcnp, 
                        Elf_X_Shdr*& rel_plt_scnp, Elf_X_Shdr*& plt_scnp, 
                        Elf_X_Shdr*& got_scnp, Elf_X_Shdr*& dynsym_scnp,
                        Elf_X_Shdr*& dynstr_scnp, Elf_X_Shdr* &dynamic_scnp, 
                        Elf_X_Shdr*& eh_frame, Elf_X_Shdr*& gcc_except, 
                        Elf_X_Shdr *& interp_scnp, Elf_X_Shdr *& opd_scnp, 
                        bool)
{
   std::map<std::string, int> secnNameMap;
   dwarf_err_func  = err_func_;
   entryAddress_ = elfHdr->e_entry();

   no_of_sections_ = elfHdr->e_shnum();

   // ".shstrtab" section: string table for section header names
   const char *shnames = pdelf_get_shnames(elfHdr);
   if (shnames == NULL) {
      //fprintf(stderr, "[%s][%d]WARNING: .shstrtab section not found in ELF binary\n",__FILE__,__LINE__);
      log_elferror(err_func_, ".shstrtab section");
      //return false;
   }

   // initialize Object members

   text_addr_ = 0; //ccw 23 jan 2002
   text_size_ = 0; //for determining if a mutation
   //falls within the text section 
   //of a shared library

   elf_hash_addr_ = 0;
   gnu_hash_addr_ = 0;

   dynamic_offset_ = 0;
   dynamic_addr_ = 0;
   dynsym_addr_ = 0;
   dynsym_size_ = 0;
   dynstr_addr_ = 0;
   init_addr_ = 0;
   fini_addr_ = 0;
   got_addr_ = 0;
   got_size_ = 0;
   plt_addr_ = 0;
   plt_size_ = 0;
   symtab_addr_ = 0;
   strtab_addr_ = 0;
#if defined (ppc32_linux) || defined(ppc32_bgp)
   plt_entry_size_ = 8;
   rel_plt_entry_size_ = 8;
#else
   plt_entry_size_ = 0;
   rel_plt_entry_size_ = 0;
#endif
   rel_plt_addr_ = 0;
   rel_plt_size_ = 0;
   rel_addr_ = 0;
   rel_size_ = 0;
   rel_entry_size_ = 0;
   stab_off_ = 0;
   stab_size_ = 0;
   stabstr_off_ = 0;
   stab_indx_off_ = 0;
   stab_indx_size_ = 0;
   stabstr_indx_off_ = 0;
#if defined(os_irix)
   MIPS_stubs_addr_ = 0;
   MIPS_stubs_off_ = 0;
   MIPS_stubs_size_ = 0;
   got_zero_index_ = -1;
   dynsym_zero_index_ = -1;
#endif
   dwarvenDebugInfo = false;

   txtaddr = 0;

   set<string> sectionsInOriginalBinary;

#if defined(TIMED_PARSE)
   struct timeval starttime;
   gettimeofday(&starttime, NULL);
#endif

   // Find pointer to dynamic section and interpreter section
   bool foundInterp = false;
   unsigned phdr_max_count = elfHdr->e_phnum();

   for (unsigned i = 0; i < phdr_max_count; i++) {
      Elf_X_Phdr &elfPhdr = elfHdr->get_phdr(i);
      if(elfPhdr.p_type() == PT_DYNAMIC){
          dynamic_offset_ = elfPhdr.p_offset();
          dynamic_size_ = elfPhdr.p_memsz();
        } else if (elfPhdr.p_type() == PT_INTERP) {
          foundInterp = true;
      }
   }

   if (elfHdr->e_type() == ET_DYN || foundInterp || elfHdr->e_type() == ET_REL) {
      is_static_binary_ = false;    
   } else {
      is_static_binary_ = true; 
   }

   bool foundDynamicSection = false;
   int dynamic_section_index = -1;
   unsigned int dynamic_section_type = 0;
   size_t dynamic_section_size = 0;
   for (int i = 0; i < elfHdr->e_shnum();++i) {
      Elf_X_Shdr &scn = elfHdr->get_shdr(i);
      if (! scn.isValid()) {  // section is malformed
         continue; 
      }
      if ((dynamic_offset_ !=0) && (scn.sh_offset() == dynamic_offset_)) {
         if (!foundDynamicSection) {
            dynamic_section_index = i;
            dynamic_section_size = scn.sh_size();
            dynamic_section_type = scn.sh_type();
            foundDynamicSection = true;
         } else {   
            // If there are two or more sections with the same offset as the dynamic_offset,
            // use other fields to chose which one the the dynamic section  
            if (dynamic_section_size == dynamic_size_ && dynamic_section_type == SHT_DYNAMIC) {
               // We already have the right section
            } else if ((scn.sh_size() == dynamic_size_ && scn.sh_type() == SHT_DYNAMIC) ||
                       (scn.sh_size() == dynamic_size_)) {
               // This section is a better match to be the dynamic section
               // than the previous one!
               dynamic_section_index = i;
               dynamic_section_size = scn.sh_size();
               dynamic_section_type = scn.sh_type();
            }
         } 
      } 
   }

   if (dynamic_section_index != -1) {
      Elf_X_Shdr &scn = elfHdr->get_shdr(dynamic_section_index);
      Elf_X_Data data = scn.get_data();
      Elf_X_Dyn dynsecData = data.get_dyn();
      // Ubuntu 12.04 - we have debug files with NOBITS dynamic sections. 
      if (dynsecData.isValid()) {
         for (unsigned j = 0; j < dynsecData.count(); ++j) {
            switch (dynsecData.d_tag(j)) {
               case DT_REL:
                  hasReldyn_ = true;
                  secAddrTagMapping[dynsecData.d_ptr(j)] = dynsecData.d_tag(j);
                  break;
               case DT_RELA:
                  hasReladyn_ = true;
                  secAddrTagMapping[dynsecData.d_ptr(j)] = dynsecData.d_tag(j);
                  break;
               case DT_JMPREL:
                  secAddrTagMapping[dynsecData.d_ptr(j)] = dynsecData.d_tag(j);
                  break;
               case DT_SYMTAB:
               case DT_STRTAB:
               case DT_VERSYM:
               case DT_VERNEED:
                  secAddrTagMapping[dynsecData.d_ptr(j)] = dynsecData.d_tag(j);
                  break;
               case DT_HASH:
                  secAddrTagMapping[dynsecData.d_ptr(j)] = dynsecData.d_tag(j);
                  elf_hash_addr_ = dynsecData.d_ptr(j);
                  break;
               case  0x6ffffef5: //DT_GNU_HASH (not defined on all platforms)
                  secAddrTagMapping[dynsecData.d_ptr(j)] = dynsecData.d_tag(j);
                  gnu_hash_addr_ = dynsecData.d_ptr(j);
                  break;
               case DT_PLTGOT:
                  secAddrTagMapping[dynsecData.d_ptr(j)] = dynsecData.d_tag(j);
                  break;
               case DT_RELSZ:
                  secTagSizeMapping[DT_REL] = dynsecData.d_val(j);
                  break;
               case DT_RELASZ:
                  secTagSizeMapping[DT_RELA] = dynsecData.d_val(j);
                  break;
               case DT_PLTRELSZ:
                  secTagSizeMapping[DT_JMPREL] = dynsecData.d_val(j);
                  break;
               case DT_STRSZ:
                  secTagSizeMapping[DT_STRTAB] = dynsecData.d_val(j);
                  break;
               case DT_PLTREL: 
                  if (dynsecData.d_val(j) == DT_REL)
                     hasRelplt_ = true;
                  else if (dynsecData.d_val(j) == DT_RELA)
                     hasRelaplt_ = true;
                  break;
      
            }
         }
      }
      dyn_hash_map<Offset, int>::iterator it = secAddrTagMapping.begin();
      while (it != secAddrTagMapping.end()) {
         int tag = it->second;
         switch (tag) {
            // Only sections with these tags are moved in the new rewritten binary 
            case DT_REL:
            case DT_RELA:
            case DT_JMPREL:
            case DT_SYMTAB:
            case DT_STRTAB:
            case DT_VERSYM:
            case DT_VERNEED:
            case DT_HASH:
            case  0x6ffffef5: // DT_GNU_HASH (not defined on all platforms)
      
               if (secTagSizeMapping.find(tag) != secTagSizeMapping.end()) {
                  vector<Offset> row;
                  row.push_back(it->first);
                  row.push_back(it->first+ secTagSizeMapping[tag]);
                  moveSecAddrRange.push_back(row);
               } else {
                  vector<Offset> row;
                  row.push_back(it->first);
                  row.push_back(it->first);
                  moveSecAddrRange.push_back(row);
               }
               break;
         }
         it++;
      }
   }
   
   isBlueGeneP_ = false;
   isBlueGeneQ_ = false;

   hasNoteSection_ = false;
 
   const char *shnamesForDebugInfo = NULL;
   unsigned int elfHdrDbg_numSections = 0;
   unsigned int elfHdr_numSections = elfHdr->e_shnum();
   Elf_X *elfHdrDbg = dwarf->debugLinkFile();
   if (elfHdrDbg) {
      shnamesForDebugInfo = pdelf_get_shnames(elfHdrDbg);
      if (shnamesForDebugInfo == NULL) {
         log_elferror(err_func_, ".shstrtab section");
      }
      elfHdrDbg_numSections = elfHdrDbg->e_shnum();
   }

   for (unsigned int i = 0; i < elfHdr_numSections + elfHdrDbg_numSections; i++) {
      const char *name;

      bool isFromDebugFile = (i >= elfHdr_numSections);
      Elf_X_Shdr &scn = (!isFromDebugFile) ? elfHdr->get_shdr(i) :
                                             elfHdrDbg->get_shdr(i - elfHdr_numSections);
      if (! scn.isValid()) { // section is malformed
         continue; 
      } 
      Elf_X_Shdr *scnp = &scn;

      if (!isFromDebugFile) {
         name = &shnames[scn.sh_name()];
         sectionsInOriginalBinary.insert(string(name));
         
         if(scn.sh_flags() & SHF_ALLOC) {
            DbgAddrConversion_t orig;
            orig.name = std::string(name);
            orig.orig_offset = scn.sh_addr();
            secnNameMap[orig.name] = DebugSectionMap.size();
            DebugSectionMap.push_back(orig);
         }
      }
      else {
         if (!shnamesForDebugInfo) 
            break;
         name = &shnamesForDebugInfo[scn.sh_name()];

         std::string sname(name);
         std::map<std::string, int>::iterator s = secnNameMap.find(sname);
         if (s != secnNameMap.end()) {
            int i = (*s).second;
            DebugSectionMap[i].dbg_offset = scn.sh_addr();
            DebugSectionMap[i].dbg_size = scn.sh_size();
         }
         scn.setDebugFile(true);

         if (scn.sh_type() == SHT_NOBITS) {
            continue;
         }
      }

      if(scn.sh_type() == SHT_NOTE) {
         hasNoteSection_ = true;
      }


      //If the section appears in the memory image of a process address is given by 
      // sh_addr()
      //otherwise this is zero and sh_offset() gives the offset to the first byte 
      // in section.
      if (!scn.isFromDebugFile()) {
         allRegionHdrs.push_back(&scn);
         if(scn.sh_flags() & SHF_ALLOC) {
            // .bss, etc. have a disk size of 0
            unsigned long diskSize  = (scn.sh_type() == SHT_NOBITS) ? 0 : scn.sh_size();
            Region *reg = new Region(i, name, scn.sh_addr(), diskSize, 
                                     scn.sh_addr(), scn.sh_size(), 
                                     (mem_image()+scn.sh_offset()), 
                                     getRegionPerms(scn.sh_flags()), 
                                     getRegionType(scn.sh_type(), 
                                                   scn.sh_flags(),
                                                   name), 
                                     true, ((scn.sh_flags() & SHF_TLS) != 0),
                                     scn.sh_addralign());
            reg->setFileOffset(scn.sh_offset());
            regions_.push_back(reg);
         }
         else {
            Region *reg = new Region(i, name, scn.sh_addr(), scn.sh_size(), 0, 0, 
                                     (mem_image()+scn.sh_offset()), 
                                     getRegionPerms(scn.sh_flags()), 
                                     getRegionType(scn.sh_type(), 
                                                   scn.sh_flags(),
                                                   name), 
                                     false, ((scn.sh_flags() & SHF_TLS) != 0),
                                     scn.sh_addralign());

            reg->setFileOffset(scn.sh_offset());
            regions_.push_back(reg);
         }
      }

      // section-specific processing
      if (P_strcmp(name, EDITED_TEXT_NAME) == 0) {
         // EEL rewritten executable
         EEL = true;
         if (txtaddr == 0)
            txtaddr = scn.sh_addr();
         char *file_ptr = (char *)mf->base_addr();
         code_ptr_ = (char *)(void*)&file_ptr[scn.sh_offset() - EXTRA_SPACE];
         code_off_ = scn.sh_addr() - EXTRA_SPACE;
         code_len_ = scn.sh_size() + EXTRA_SPACE;
      }

      if (strcmp(name, TEXT_NAME) == 0) {
         text_addr_ = scn.sh_addr();
         text_size_ = scn.sh_size();

         if (txtaddr == 0)
            txtaddr = scn.sh_addr();
      
         // .o's don't have program headers, so these members need
         // to be populated here
         if( !elfHdr->e_phnum() && !code_len_) {
            // Populate code members
            code_ptr_ = reinterpret_cast<char *>(scn.get_data().d_buf());
            code_off_ = scn.sh_offset();
            code_len_ = scn.sh_size();
         }
      }
      /* The following sections help us find the PH entry that
         encompasses the data region. */
      else if (strcmp(name, DATA_NAME) == 0) {
         dataddr = scn.sh_addr();

         // .o's don't have program headers, so these members need
         // to be populated here
         if( !elfHdr->e_phnum() && !data_len_) {
            // Populate data members
            data_ptr_ = reinterpret_cast<char *>(scn.get_data().d_buf());
            data_off_ = scn.sh_offset();
            data_len_ = scn.sh_size();
         }
      }
      else if (strcmp(name, RO_DATA_NAME) == 0) {
         if (!dataddr) dataddr = scn.sh_addr();
      }
      else if (strcmp(name, GOT_NAME) == 0) {
         got_scnp = scnp;
         got_addr_ = scn.sh_addr();
         got_size_ = scn.sh_size();
         if (!dataddr) dataddr = scn.sh_addr();
      }
      else if (strcmp(name, BSS_NAME) == 0) {
         bssscnp = scnp;
         if (!dataddr) dataddr = scn.sh_addr();
      }
      /* End data region search */
      /*else if (strcmp( name, FINI_NAME) == 0) {
        fini_addr_ = scn.sh_addr();
        }*/
      else if (strcmp(name, SYMTAB_NAME) == 0) {
         if (!symscnp) {
            symscnp = scnp;
            symtab_addr_ = scn.sh_addr();
         }
      }
      else if (strcmp(name, STRTAB_NAME) == 0) {
         if (!strscnp) {
            strscnp = scnp;
            strtab_addr_ = scn.sh_addr();
         }  
      } else if (strcmp(name, STAB_INDX_NAME) == 0) {
         stabs_indxcnp = scnp;
         stab_indx_off_ = scn.sh_offset();
         stab_indx_size_ = scn.sh_size();
      } else if (strcmp(name, STABSTR_INDX_NAME) == 0) {
         stabstrs_indxcnp = scnp;
         stabstr_indx_off_ = scn.sh_offset();
      } else if (strcmp(name, STAB_NAME) == 0) {
         stabscnp = scnp;
         stab_off_ = scn.sh_offset();
         stab_size_ = scn.sh_size();
      } else if (strcmp(name, STABSTR_NAME) == 0) {
         stabstrscnp = scnp;
         stabstr_off_ = scn.sh_offset();
      } 
#if defined(os_vxworks)
      else if ((strcmp(name, REL_PLT_NAME) == 0) || 
               (strcmp(name, REL_PLT_NAME2) == 0)) {
         rel_plt_scnp = scnp;
         rel_plt_addr_ = scn.sh_addr();
         rel_plt_size_ = scn.sh_size();
         rel_plt_entry_size_ = scn.sh_entsize();
      }
#else
      else if ((secAddrTagMapping.find(scn.sh_addr()) != secAddrTagMapping.end() ) && 
               secAddrTagMapping[scn.sh_addr()] == DT_JMPREL ) {
         rel_plt_scnp = scnp;
         rel_plt_addr_ = scn.sh_addr();
         rel_plt_size_ = scn.sh_size();
         rel_plt_entry_size_ = scn.sh_entsize();
      }
#endif
      else if (strcmp(name, OPD_NAME) == 0) {
         opd_scnp = scnp;
         opd_addr_ = scn.sh_addr();
         opd_size_ = scn.sh_size();
      }
      else if (strcmp(name, PLT_NAME) == 0) {
         plt_scnp = scnp;
         plt_addr_ = scn.sh_addr();
         plt_size_ = scn.sh_size();
#if defined(arch_x86) || defined(arch_x86_64)
         //
         // On x86, the GNU linker purposefully sets the PLT
         // table entry size to an incorrect value to be
         // compatible with the UnixWare linker.  (See the comment
         // in the elf_i386_finish_dynamic_sections function of
         // the BFD library.)  The GNU linker sets this value to 4,
         // when it should be 16.
         //
         // I see no good way to determine this value from the
         // ELF section header information.  We can either (a) hard-code
         // the value that is used in the BFD library, or (b) compute
         // it by dividing the size of the PLT by the number of entries
         // we think should be in the PLT.  I'm not certain, but I
         // believe the PLT and the .rel.plt section should have the
         // same number of "real" entries (the x86 PLT has one extra entry
         // at the beginning).
         // 
         // This code is applicable to any x86 system that uses the
         // GNU linker.  We currently only support Linux on x86 - if
         // we start supporting some other x86 OS that uses the GNU
         // linker in the future, it should be enabled for that platform as well.
         // Note that this problem does not affect the non-x86 platforms
         // that might use the GNU linker.  For example, programs linked
         // with gld on SPARC Solaris have the correct PLT entry size.
         //
         // Another potential headache in the future is if we support
         // some other x86 platform that has both the GNU linker and
         // some other linker.  (Does BSD fall into this category?)
         // If the two linkers set the entry size differently, we may
         // need to re-evaluate this code.
         //
         //plt_entry_size_ = plt_size_ / ((rel_plt_size_ / rel_plt_entry_size_) + 1);
         plt_entry_size_ = 16;
         assert( plt_entry_size_ == 16 );
#else
         plt_entry_size_ = scn.sh_entsize();
      
         // X86-64: if we're on a 32-bit binary then set the PLT entry size to 16
         // as above
#if defined(arch_x86_64)
         if (addressWidth_nbytes == 4) {
            plt_entry_size_ = 16;
            assert( plt_entry_size_ == 16 );
         }
         else {
            assert(addressWidth_nbytes == 8);
         }
#endif


#if defined (ppc32_linux) || defined(ppc32_bgp)
         if (scn.sh_flags() & SHF_EXECINSTR) {
            // Old style executable PLT
            if (!plt_entry_size_)
               plt_entry_size_ = 8;
            else {
               if (plt_entry_size_ != 8) 
                  fprintf(stderr, "%s[%d]:  weird plt_entry_size_ is %d, not 8\n", 
                          FILE__, __LINE__, plt_entry_size_);
            }

         } else {
            // New style secure PLT
            plt_entry_size_ = 16;
         }
#endif
#endif
      } else if (strcmp(name, COMMENT_NAME) == 0) {
         /* comment section is a sequence of NULL-terminated strings.
            We want to concatenate them and search for BGP to determine
            if the binary is built for BGP compute nodes */

         Elf_X_Data data = scn.get_data();
        
         unsigned int index = 0;
         size_t size = data.d_size();
         char *buf = (char *) data.d_buf();
         while (buf && (index < size))
         {
            string comment = buf+index;
            size_t pos_p = comment.find("BGP");
            size_t pos_q = comment.find("BGQ");
            if (pos_p !=string::npos) {
               isBlueGeneP_ = true;
               break;
            } else if (pos_q !=string::npos) {
               isBlueGeneQ_ = true;
               break;
            }
            index += comment.size();
            if (comment.size() == 0) { // Skip NULL characters in the comment section
               index ++;
            }
         }
      }

      else if ((secAddrTagMapping.find(scn.sh_addr()) != secAddrTagMapping.end() ) &&
               secAddrTagMapping[scn.sh_addr()] == DT_SYMTAB ) {
         is_dynamic_ = true;
         dynsym_scnp = scnp;
         dynsym_addr_ = scn.sh_addr();
         dynsym_size_ = scn.sh_size()/scn.sh_entsize();
      }
      else if ((secAddrTagMapping.find(scn.sh_addr()) != secAddrTagMapping.end() ) && 
               secAddrTagMapping[scn.sh_addr()] == DT_STRTAB ) {
         dynstr_scnp = scnp;
         dynstr_addr_ = scn.sh_addr();
      }
      else if (strcmp(name, ".debug_info") == 0) {
         dwarvenDebugInfo = true;
      }
      else if (strcmp(name, EH_FRAME_NAME) == 0) {
         eh_frame = scnp;
      }
      else if ((strcmp(name, EXCEPT_NAME) == 0) || 
               (strcmp(name, EXCEPT_NAME_ALT) == 0)) {
         gcc_except = scnp;
      }
      else if (strcmp(name, INTERP_NAME) == 0) {
         interp_scnp = scnp;
      }
      else if ((int) i == dynamic_section_index) {
         dynamic_scnp = scnp;
         dynamic_addr_ = scn.sh_addr();
      }
   }

   if(!symscnp || !strscnp) {
      isStripped = true;
      if(dynsym_scnp && dynstr_scnp){
         symscnp = dynsym_scnp;
         strscnp = dynstr_scnp;
      }
   }

   loadAddress_ = 0x0;
#if defined(os_linux) || defined(os_freebsd)
   /**
    * If the virtual address of the first PT_LOAD element in the
    * program table is 0, Linux loads the shared object into any
    * free spot into the address space.  If the virtual address is
    * non-zero, it gets loaded only at that address.
    **/
   for (unsigned i = 0; i < elfHdr->e_phnum() && !loadAddress_; ++i) {
      Elf_X_Phdr &phdr = elfHdr->get_phdr(i);

      if (phdr.p_type() == PT_LOAD) {
         loadAddress_ = phdr.p_vaddr();
         break;
      }
   }
#endif  
  
   // save a copy of region headers, maintaining order in section header table
   allRegionHdrsByShndx = allRegionHdrs;

   // sort the section headers by base address
   sort(allRegionHdrs.begin(), allRegionHdrs.end(), SectionHeaderSortFunction());

   for (unsigned j = 0 ; j < regions_.size() ; j++) {
      if (secAddrTagMapping.find(regions_[j]->getDiskOffset()) != secAddrTagMapping.end()) {
         secTagRegionMapping[secAddrTagMapping[regions_[j]->getDiskOffset()]] = regions_[j];
      }
   }

#if defined(TIMED_PARSE)
   struct timeval endtime;
   gettimeofday(&endtime, NULL);
   unsigned long lstarttime = starttime.tv_sec * 1000 * 1000 + starttime.tv_usec;
   unsigned long lendtime = endtime.tv_sec * 1000 * 1000 + endtime.tv_usec;
   unsigned long difftime = lendtime - lstarttime;
   double dursecs = difftime/(1000 );
   cout << "main loop of loaded elf took "<<dursecs <<" msecs" << endl;
#endif

   if (!dataddr || !symscnp || !strscnp) {
      //log_elferror(err_func_, "no text/bss/symbol/string section");
   }
   //if (addressWidth_nbytes == 8) bperr( ">>> 64-bit loaded_elf() successful\n");
   return true;
}

bool Object::is_offset_in_plt(Offset offset) const
{
  return (offset > plt_addr_ && offset < plt_addr_ + plt_size_);
}

void Object::parseDynamic(Elf_X_Shdr *&dyn_scnp, Elf_X_Shdr *&dynsym_scnp,
              Elf_X_Shdr *&dynstr_scnp)
{
  Elf_X_Data data = dyn_scnp->get_data();
  Elf_X_Dyn dyns = data.get_dyn();
  int rel_scnp_index = -1;

  for (unsigned i = 0; i < dyns.count(); ++i) {
    switch(dyns.d_tag(i)) {
    case DT_REL:
    case DT_RELA:
      /*found Relocation section*/
      rel_addr_ = (Offset) dyns.d_ptr(i);
      rel_scnp_index = getRegionHdrIndexByAddr(dyns.d_ptr(i));
      break;
    case DT_JMPREL:
    rel_plt_addr_ = (Offset) dyns.d_ptr(i);
    break;
    case DT_PLTRELSZ:
    rel_plt_size_ = dyns.d_val(i) ;
    break;
    case DT_RELSZ:
    case DT_RELASZ:
      rel_size_ = dyns.d_val(i) ;
      break;
    case DT_RELENT:
    case DT_RELAENT:
      rel_entry_size_ = dyns.d_val(i);
      /* Maybe */
      //rel_plt_entry_size_ = dyns.d_val(i);
      break;
    case DT_INIT:
        init_addr_ = dyns.d_val(i);
        break;
    case DT_FINI:
        fini_addr_ = dyns.d_val(i);
        break;
        default:
      break;
    }
  }
  if (rel_scnp_index  != -1)
    get_relocationDyn_entries(rel_scnp_index, dynsym_scnp, dynstr_scnp);
}

/* parse relocations for the sections represented by DT_REL/DT_RELA in
 * the dynamic section. This section is the one we would want to emit
 */
bool Object::get_relocationDyn_entries( unsigned rel_scnp_index,
                    Elf_X_Shdr *&dynsym_scnp, 
                    Elf_X_Shdr *&dynstr_scnp )
{
  Elf_X_Data symdata = dynsym_scnp->get_data();
  Elf_X_Data strdata = dynstr_scnp->get_data();
  Elf_X_Shdr* rel_scnp = NULL;
  if( !symdata.isValid() || !strdata.isValid()) 
    return false;
  const char *strs = strdata.get_string();
  Elf_X_Sym sym = symdata.get_sym();

  unsigned num_rel_entries_found = 0;
  unsigned num_rel_entries = rel_size_/rel_entry_size_;
  
  if (rel_addr_ + rel_size_ > rel_plt_addr_){
    // REL/RELA section overlaps with REL PLT section
    num_rel_entries = (rel_plt_addr_-rel_addr_)/rel_entry_size_;
  }
  while (num_rel_entries_found != num_rel_entries) {
    rel_scnp = getRegionHdrByIndex(rel_scnp_index++);
    Elf_X_Data reldata = rel_scnp->get_data();

    if( ! reldata.isValid()) return false;
    Elf_X_Rel rel = reldata.get_rel();
    Elf_X_Rela rela = reldata.get_rela();

    if (sym.isValid() && (rel.isValid() || rela.isValid()) && strs) {
      /* Iterate over the entries. */
      for( u_int i = 0; i < (reldata.d_size()/rel_entry_size_); ++i ) {
    num_rel_entries_found++;
    long offset;
    long addend;
    long index;
    unsigned long type;
    Region::RegionType rtype = Region::RT_REL;

    switch (reldata.d_type()) {
    case ELF_T_REL:
      offset = rel.r_offset(i);
      addend = 0;
      index = rel.R_SYM(i);
      type = rel.R_TYPE(i);
      break;
    
    case ELF_T_RELA:
      offset = rela.r_offset(i);
      addend = rela.r_addend(i);
      index = rela.R_SYM(i);
      type = rela.R_TYPE(i);
      rtype = Region::RT_RELA;
      break;

    default:
      // We should never reach this case.
      return false;
    };
    // /* DEBUG */ fprintf( stderr, "%s: relocation information for target 0x%lx\n", __FUNCTION__, next_plt_entry_addr );
    relocationEntry re( offset, string( &strs[ sym.st_name(index) ] ), NULL, type );
    re.setAddend(addend);
    re.setRegionType(rtype);
    if(symbols_.find(&strs[ sym.st_name(index)]) != symbols_.end()){
      vector<Symbol *> &syms = symbols_[&strs[ sym.st_name(index)]];
     for (vector<Symbol *>::iterator i = syms.begin(); i != syms.end(); i++) {
        if (!(*i)->isInDynSymtab())
           continue;
        re.addDynSym(*i);
        break;
     }
    }

    relocation_table_.push_back(re);
      }
    } else {
      return false;
    }
    
  }
  return true;
}

bool Object::get_relocation_entries( Elf_X_Shdr *&rel_plt_scnp,
                     Elf_X_Shdr *&dynsym_scnp, 
                     Elf_X_Shdr *&dynstr_scnp )
{
  if (rel_plt_size_ && rel_plt_addr_) {
    Elf_X_Data reldata = rel_plt_scnp->get_data();
    Elf_X_Data symdata = dynsym_scnp->get_data();
    Elf_X_Data strdata = dynstr_scnp->get_data();

    if( reldata.isValid() && symdata.isValid() && strdata.isValid() ) {
      Offset next_plt_entry_addr = plt_addr_;

#if defined(arch_x86) || defined(arch_x86_64)
      next_plt_entry_addr += plt_entry_size_;  // 1st PLT entry is special

#elif defined (ppc32_linux) || defined(ppc32_bgp)
      bool extraStubs = false;

      // Sanity check.
      if (!plt_entry_size_) {
    fprintf(stderr, "%s[%d]:  FIXME:  plt_entry_size not established\n", FILE__, __LINE__);
    plt_entry_size_ = 8;
      }

      if (plt_entry_size_ == 8) {
          // Old style executable PLT section
      next_plt_entry_addr += 9*plt_entry_size_;  // 1st 9 PLT entries are special

      } else if (plt_entry_size_ == 16) {
          // New style secure PLT
          Region *plt = NULL, *relplt = NULL, *dynamic = NULL,
                 *got = NULL, *glink = NULL;
          unsigned int glink_addr = 0;
          unsigned int stub_addr = 0;

          // Find the GLINK section.  See ppc_elf_get_synthetic_symtab() in
          // bfd/elf32-ppc.c of GNU's binutils for more information.

          for (unsigned iter = 0; iter < regions_.size(); ++iter) {
              std::string name = regions_[iter]->getRegionName();
              if (name == PLT_NAME) plt = regions_[iter];
              else if (name == REL_PLT_NAME) relplt = regions_[iter];
              else if (name == DYNAMIC_NAME) dynamic = regions_[iter];
              else if (name == GOT_NAME) got = regions_[iter];
          }

          // Rely on .dynamic section for prelinked binaries.
          if (dynamic != NULL) {
              Elf32_Dyn *dyn = (Elf32_Dyn *)dynamic->getPtrToRawData();
              unsigned int count = dynamic->getMemSize() / sizeof(Elf32_Dyn);

              for (unsigned int i = 0; i < count; ++i) {
                  // Use DT_LOPROC instead of DT_PPC_GOT to circumvent problems
                  // caused by early versions of libelf where DT_PPC_GOT has
                  // yet to be defined.
                  if (dyn[i].d_tag == DT_LOPROC) {
                      unsigned int g_o_t = dyn[i].d_un.d_val;
                      if (got != NULL) {
                          unsigned char *data =
                              (unsigned char *)got->getPtrToRawData();
                          glink_addr = *(unsigned int *)
                              (data + (g_o_t - got->getMemOffset() + 4));
                          break;
                      }
                  }
              }
          }

          // Otherwise, first entry in .plt section holds the glink address
          if (glink_addr == 0) {
              unsigned char *data = (unsigned char *)plt->getPtrToRawData();
              glink_addr = *(unsigned int *)(data);
          }

          // Search for region that contains glink address
          for (unsigned iter = 0; iter < regions_.size(); ++iter) {
              unsigned int start = regions_[iter]->getMemOffset();
              unsigned int end = start + regions_[iter]->getMemSize();
              if (start <= glink_addr && glink_addr < end) {
                  glink = regions_[iter];
                  break;
              }
          }

          if (!glink) {
//              fprintf(stderr, "*** Cound not find .glink section for '%s'.\n",
//                      mf->pathname().c_str());
//              fprintf(stderr, "*** It may not be a ppc32 elf object.\n");
              return false;
          }

          // Find PLT function stubs.  They preceed the glink section.
          stub_addr = glink_addr - (rel_plt_size_/rel_plt_entry_size_) * 16;

          const unsigned int LWZ_11_30   = 0x817e0000;
          const unsigned int ADDIS_11_30 = 0x3d7e0000;
          const unsigned int LWZ_11_11   = 0x816b0000;
          const unsigned int MTCTR_11    = 0x7d6903a6;
          const unsigned int BCTR        = 0x4e800420;

          unsigned char *sec_data = (unsigned char *)glink->getPtrToRawData();
          unsigned int *insn = (unsigned int *)
              (sec_data + (stub_addr - glink->getMemOffset()));

          // Keep moving pointer back if more -fPIC stubs are found.
          while (sec_data < (unsigned char *)insn) {
              unsigned int *back = insn - 4;

              if ((  (back[0] & 0xffff0000) == LWZ_11_30
                   && back[1] == MTCTR_11
                   && back[2] == BCTR)

                  || (   (back[0] & 0xffff0000) == ADDIS_11_30
                      && (back[1] & 0xffff0000) == LWZ_11_11
                      &&  back[2] == MTCTR_11
                      &&  back[3] == BCTR))
                  {
                      extraStubs = true;
                      stub_addr -= 16;
                      insn = back;
                  } else {
                      break;
                  }
          }

          // Okay, this is where things get hairy.  If we have a one to one
          // relationship between the glink stubs and plt entries (meaning
          // extraStubs == false), then we can generate our relocationEntry
          // objects normally below.

          // However, if we have extra glink stubs, then we must generate
          // relocations with unknown destinations for *all* stubs.  Then,
          // we use the loop below to store additional information about
          // the data plt entry keyed by plt entry address.

          // Finally, if a symbol with any of the following forms:
          //     [hex_addr].got2.plt_pic32.[sym_name]
          //     [hex_addr].plt_pic32.[sym_name]
          //
          // matches the glink stub address, then stub symbols exist and we
          // can rely on these tell us where the stub will eventually go.

          if (extraStubs == true) {
              std::string name;
              relocationEntry re;

              while (stub_addr < glink_addr) {
                  if (symsByOffset_.find(stub_addr) != symsByOffset_.end()) {
                      name = (symsByOffset_[stub_addr])[0]->getMangledName();
                      name = name.substr( name.rfind("plt_pic32.") + 10 );
                  }

                  if (!name.empty()) {
                      re = relocationEntry( stub_addr, 0, name, NULL, 0 );
                  } else {
                      re = relocationEntry( stub_addr, 0, "@plt", NULL, 0 );
                  }
                  fbt_.push_back(re);
                  stub_addr += 16;
              }

              // Now prepare to iterate over plt below.
              next_plt_entry_addr = plt_addr_;
              plt_entry_size_ = 4;

          } else {
              next_plt_entry_addr = stub_addr;
          }

      } else {
          fprintf(stderr, "ERROR: Can't handle %d PLT entry size\n",
                  plt_entry_size_);
          return false;
      }

      //fprintf(stderr, "%s[%d]:  skipping %d (6*%d) bytes initial plt\n", 
      //        FILE__, __LINE__, 9*plt_entry_size_, plt_entry_size_);
      //  actually this is just fudged to make the offset value 72, which is what binutils uses
      //  Note that binutils makes the distinction between PLT_SLOT_SIZE (8), 
      //  and PLT_ENTRY_SIZE (12).  PLT_SLOT_SIZE seems to be what we want, even though we also
      //  have PLT_INITIAL_ENTRY_SIZE (72)
      //  see binutils/bfd/elf32-ppc.c/h if more info is needed
      //next_plt_entry_addr += 72;  // 1st 6 PLT entries art special

#elif defined(arch_power) && defined(arch_64bit) && defined(os_linux)
      // Unlike PPC32 Linux, we don't have a deterministic way of finding
      // PPC64 Linux linker stubs.  So, we'll wait until the CFG is built
      // inside Dyninst, and code read at that point.  To find them at this
      // point would require a scan of the entire .text section.
      //
      // If we're lucky, symbols may exist for these linker stubs.  They will
      // come in the following forms:
      //     [hex_addr].plt_call.[sym_name]
      //     [hex_addr].plt_branch.[sym_name]
      //     [hex_addr].long_branch.[sym_name]
      //     [hex_addr].plt_branch_r2off.[sym_name]
      //     [hex_addr].long_branch_r2off.[sym_name]
      //
      // Again unlike PPC32 above, we have no glink stub address to compare
      // against, so we must search through all symbols to find these names.
      //

      // First, build a map of the .rela.plt symbol name -> .rela.plt offset:
      dyn_hash_map<std::string, Offset> plt_rel_map;

      // I'm not a fan of code duplication, but merging this into the
      // loop below would be ugly and difficult to maintain.
      Elf_X_Sym  _sym  = symdata.get_sym();
      Elf_X_Rel  _rel  = reldata.get_rel();
      Elf_X_Rela _rela = reldata.get_rela();
      const char *_strs = strdata.get_string();

      for( u_int i = 0; i < (rel_plt_size_/rel_plt_entry_size_); ++i ) {
      long _offset;
      long _index;

      switch (reldata.d_type()) {
      case ELF_T_REL:
              _offset = _rel.r_offset(i);
              _index  = _rel.R_SYM(i);
              break;

      case ELF_T_RELA:
              _offset = _rela.r_offset(i);
              _index  = _rela.R_SYM(i);
              break;

      default:
        // We should never reach this case.
        return false;
      };

          std::string _name = &_strs[ _sym.st_name(_index) ];
          // I'm interested to see if this assert will ever fail.
          assert(_name.length());

          plt_rel_map[_name] = _offset;
      }
      // End code duplication.

      dyn_hash_map<std::string, std::vector<Symbol *> >::iterator iter;
      for (iter = symbols_.begin(); iter != symbols_.end(); ++iter) {
          std::string name = iter->first;
          if (name.length() > 8) {
              if (name.substr(8, 10) == ".plt_call.")
                  name = name.substr(8 + 10);
              else if (name.substr(8, 12) == ".plt_branch.")
                  name = name.substr(8 + 12);
              else if (name.substr(8, 13) == ".long_branch.")
                  name = name.substr(8 + 13);
              else if (name.substr(8, 18) == ".plt_branch_r2off.")
                  name = name.substr(8 + 18);
              else if (name.substr(8, 19) == ".long_branch_r2off.")
                  name = name.substr(8 + 19);
              else
                  continue;

              // Remove possible trailing addend value.
              std::string::size_type pos = name.rfind('+');
              if (pos != std::string::npos) name.erase(pos);

              // Remove possible version number.
              pos = name.find('@');
              if (pos != std::string::npos) name.erase(pos);

              // Find the dynamic symbol this linker stub branches to.
              Symbol *targ_sym = NULL;
              if (symbols_.find(name) != symbols_.end())
                  for (unsigned i = 0; i < symbols_[name].size(); ++i)
                      if ( (symbols_[name])[i]->isInDynSymtab())
                          targ_sym = (symbols_[name])[i];

              // If a corresponding target symbol cannot be found for a
              // named linker stub, then ignore it.  We'll find it during
              // parsing.
              if (!targ_sym) continue;
              
              // I'm interested to see if these asserts will ever fail.
              assert(iter->second.size() == 1);
              assert(plt_rel_map.count(name) == 1);
              
              Symbol *stub_sym = iter->second[0];
              relocationEntry re(stub_sym->getOffset(),
                                 plt_rel_map[name],
                                 name,
                                 targ_sym);
              fbt_.push_back(re);
    }
      }

      // 1st plt entry is special.
      next_plt_entry_addr += plt_entry_size_;

#else
      next_plt_entry_addr += 4*(plt_entry_size_); //1st 4 entries are special
#endif

      Elf_X_Sym sym = symdata.get_sym();
      Elf_X_Rel rel = reldata.get_rel();
      Elf_X_Rela rela = reldata.get_rela();
      const char *strs = strdata.get_string();

      if (sym.isValid() && (rel.isValid() || rela.isValid()) && strs) {

        // Sometimes, PPC32 Linux may use this loop to update fbt entries.
        // Should stay -1 for all other platforms.  See notes above.
        int fbt_iter = -1;
        if (fbt_.size() > 0 && !fbt_[0].rel_addr() && fbt_[0].name() != "@plt")
            fbt_iter = 0;

    for( u_int i = 0; i < (rel_plt_size_/rel_plt_entry_size_); ++i ) {
      long offset;
      long addend;
      long index;
      unsigned long type;
          Region::RegionType rtype;

      switch (reldata.d_type()) {
      case ELF_T_REL:
        offset = rel.r_offset(i);
        addend = 0;
        index = rel.R_SYM(i);
        type = rel.R_TYPE(i);
            rtype = Region::RT_REL;
        break;

      case ELF_T_RELA:
        offset = rela.r_offset(i);
        addend = rela.r_addend(i);
        index = rela.R_SYM(i);
        type = rela.R_TYPE(i);
        rtype = Region::RT_RELA;
        break;

      default:
        // We should never reach this case.
        return false;
      };

          std::string targ_name = &strs[ sym.st_name(index) ];
          vector<Symbol *> dynsym_list;
          if (symbols_.find(targ_name) != symbols_.end()) 
          {
             vector<Symbol *> &syms = symbols_[&strs[ sym.st_name(index)]];
             for (vector<Symbol *>::iterator i = syms.begin(); i != syms.end(); i++) {             
                if (!(*i)->isInDynSymtab())
                   continue;
                dynsym_list.push_back(*i);
             }
          } 
          else {
            dynsym_list.clear();
          }

#if defined(os_vxworks)
          // VxWorks Kernel Images don't use PLT's, but we'll use the fbt to
          // note all function call relocations, and we'll fix these up later
          // in Symtab::fixup_RegionAddr()
          next_plt_entry_addr = sym.st_value(index);
#endif

          if (fbt_iter == -1) { // Create new relocation entry.
            relocationEntry re( next_plt_entry_addr, offset, targ_name,
                                NULL, type );
            re.setAddend(addend);
            re.setRegionType(rtype);
            if (dynsym_list.size() > 0)
                re.addDynSym(dynsym_list[0]);
            fbt_.push_back(re);

          } else { // Update existing relocation entry.
            while ((unsigned)fbt_iter < fbt_.size() &&
                   fbt_[fbt_iter].name() == targ_name) {

              fbt_[fbt_iter].setRelAddr(offset);
              fbt_[fbt_iter].setAddend(addend);
              fbt_[fbt_iter].setRegionType(rtype);
              if (dynsym_list.size() > 0)
                fbt_[fbt_iter].addDynSym(dynsym_list[0]);

              ++fbt_iter;
            }
          }

#if defined(os_vxworks)
          // Nothing to increment here.
#else
      next_plt_entry_addr += plt_entry_size_;
#endif
    }
    return true;
      }
    }
  }
  return false;
}

void Object::load_object(bool alloc_syms)
{
  Elf_X_Shdr *bssscnp = 0;
  Elf_X_Shdr *symscnp = 0;
  Elf_X_Shdr *strscnp = 0;
  Elf_X_Shdr *stabscnp = 0;
  Elf_X_Shdr *stabstrscnp = 0;
  Elf_X_Shdr *stabs_indxcnp = 0;
  Elf_X_Shdr *stabstrs_indxcnp = 0;
  Offset txtaddr = 0;
  Offset dataddr = 0;
  Elf_X_Shdr *rel_plt_scnp = 0;
  Elf_X_Shdr *plt_scnp = 0; 
  Elf_X_Shdr *got_scnp = 0;
  Elf_X_Shdr *dynsym_scnp = 0;
  Elf_X_Shdr *dynstr_scnp = 0;
  Elf_X_Shdr *dynamic_scnp = 0;
  Elf_X_Shdr *eh_frame_scnp = 0;
  Elf_X_Shdr *gcc_except = 0;
  Elf_X_Shdr *interp_scnp = 0;
  Elf_X_Shdr *opd_scnp = NULL;

  { // binding contour (for "goto cleanup")

    // initialize object (for failure detection)
    code_ptr_ = 0;
    code_off_ = 0;
    code_len_ = 0;
    data_ptr_ = 0;
    data_off_ = 0;
    data_len_ = 0;

    // initialize "valid" regions of code and data segments
    code_vldS_ = (Offset) -1;
    code_vldE_ = 0;
    data_vldS_ = (Offset) -1;
    data_vldE_ = 0;

    // And attempt to parse the ELF data structures in the file....
    // EEL, added one more parameter

    if (!loaded_elf(txtaddr, dataddr, bssscnp, symscnp, strscnp,
            stabscnp, stabstrscnp, stabs_indxcnp, stabstrs_indxcnp,
            rel_plt_scnp, plt_scnp, got_scnp, dynsym_scnp, dynstr_scnp,
                    dynamic_scnp, eh_frame_scnp,gcc_except, interp_scnp, 
            opd_scnp, true))
      {
    goto cleanup;
      }

    addressWidth_nbytes = elfHdr->wordSize();

    // find code and data segments....
    find_code_and_data(*elfHdr, txtaddr, dataddr);

    if (elfHdr->e_type() != ET_REL) 
      {
    if (!code_ptr_ || !code_len_) 
      {
            //bpfatal( "no text segment\n");
            goto cleanup;
      }

    if (!data_ptr_ || !data_len_) 
      {
            //bpfatal( "no data segment\n");
            goto cleanup;
      }
      }
    get_valid_memory_areas(*elfHdr);

    //fprintf(stderr, "[%s:%u] - Exe Name\n", __FILE__, __LINE__);

#if (defined(os_linux) || defined(os_freebsd)) && (defined(arch_x86) || defined(arch_x86_64))
    if (eh_frame_scnp != 0 && gcc_except != 0) 
      {
    find_catch_blocks(eh_frame_scnp, gcc_except, 
              txtaddr, dataddr, catch_addrs_);
      }
#endif
    if (interp_scnp) {
      interpreter_name_ = (char *) interp_scnp->get_data().d_buf(); 
    }

    // global symbols are put in global_symbols. Later we read the
    // stab section to find the module to where they belong.
    // Experiment : lets try to be a bit more intelligent about
    // how we initially size the global_symbols table.  
    // dictionary_lite takes an initial # of bins (2nd param), 
    // a max bin load (3rd param), and a grow factor (4th param).
    // Leaving aside the grow factor, lets allocate an initial #
    // of bins = nsyms / max bin load.

#if defined(TIMED_PARSE)
    struct timeval starttime;
    gettimeofday(&starttime, NULL);
#endif
    if (alloc_syms) 
      {
    // find symbol and string data
#if defined(os_vxworks)
        // Avoid assigning symbols to DEFAULT_MODULE on VxWorks
        string module = mf->pathname();
#else
    string module = "DEFAULT_MODULE";
#endif
    string name   = "DEFAULT_NAME";
    Elf_X_Data symdata, strdata;

    if (symscnp && strscnp)
      {
            symdata = symscnp->get_data();
            strdata = strscnp->get_data();
            parse_symbols(symdata, strdata, bssscnp, symscnp, false, module);
      }   

    no_of_symbols_ = nsymbols();

    // try to resolve the module names of global symbols
    // Sun compiler stab.index section 
    fix_global_symbol_modules_static_stab(stabs_indxcnp, stabstrs_indxcnp);

    // STABS format (.stab section)
    fix_global_symbol_modules_static_stab(stabscnp, stabstrscnp);

    // DWARF format (.debug_info section)
    fix_global_symbol_modules_static_dwarf();

    if (dynamic_addr_ && dynsym_scnp && dynstr_scnp)
      {
            symdata = dynsym_scnp->get_data();
            strdata = dynstr_scnp->get_data();
            parse_dynamicSymbols(dynamic_scnp, symdata, strdata, false, module);
      }

    //TODO
    //Have a hash on the symbol table. Iterate over dynamic symbol table to check if it exists
    //If yes set dynamic for the symbol ( How to distinguish between symbols only in symtab,
    //         symbols only in dynsymtab & symbols present in both).
    // Else add dynamic symbol to dictionary
    // (or) Have two sepearate dictionaries. Makes life easy!
    // Think about it today!!

    //allsymbols = merge(allsymbols, alldynSymbols);

#if defined(TIMED_PARSE)
    struct timeval endtime;
    gettimeofday(&endtime, NULL);
    unsigned long lstarttime = starttime.tv_sec * 1000 * 1000 + starttime.tv_usec;
    unsigned long lendtime = endtime.tv_sec * 1000 * 1000 + endtime.tv_usec;
    unsigned long difftime = lendtime - lstarttime;
    double dursecs = difftime/(1000);
    cout << "parsing/fixing/overriding elf took "<<dursecs <<" msecs" << endl;
#endif

    if (dynamic_addr_ && dynsym_scnp && dynstr_scnp) 
      {
            parseDynamic(dynamic_scnp, dynsym_scnp, dynstr_scnp);
      }

#if defined(os_vxworks)
        // Load relocations like they are PLT entries.
        // Use the non-dynamic symbol tables.
        if (rel_plt_scnp && symscnp && strscnp) {
            if (!get_relocation_entries(rel_plt_scnp, symscnp, strscnp))
                goto cleanup;
        }
#endif

    // populate "fbt_"
    if (rel_plt_scnp && dynsym_scnp && dynstr_scnp) 
      {
            if (!get_relocation_entries(rel_plt_scnp,dynsym_scnp,dynstr_scnp)) 
          {
        goto cleanup;
          }
      }
        parse_all_relocations(*elfHdr, dynsym_scnp, dynstr_scnp,
                symscnp, strscnp);

    handle_opd_relocations();    
      }

    //Set object type
    int e_type = elfHdr->e_type();

    if (e_type == ET_DYN) {
    obj_type_ = obj_SharedLib;
    }else if (e_type == ET_EXEC) {
    obj_type_ = obj_Executable;
    }else if (e_type == ET_REL) {
        obj_type_ = obj_RelocatableFile;
    }

    // Set rel type based on the ELF machine type
    relType_ = getRelTypeByElfMachine(elfHdr);

    if (opd_scnp) {
      parse_opd(opd_scnp);
    }

    return;
  } // end binding contour (for "goto cleanup2")

 cleanup: 
  {
    /* NOTE: The file should NOT be munmap()ed.  The mapped file is
       used for function parsing (see dyninstAPI/src/symtab.C) */

    fprintf(stderr, "%s[%d]:  failed to load elf object\n", FILE__, __LINE__);
  }
}

void Object::load_shared_object(bool alloc_syms) 
{
  Elf_X_Shdr *bssscnp = 0;
  Elf_X_Shdr *symscnp = 0;
  Elf_X_Shdr *strscnp = 0;
  Elf_X_Shdr *stabscnp = 0;
  Elf_X_Shdr *stabstrscnp = 0;
  Elf_X_Shdr *stabs_indxcnp = 0;
  Elf_X_Shdr *stabstrs_indxcnp = 0;
  Offset txtaddr = 0;
  Offset dataddr = 0;
  Elf_X_Shdr *rel_plt_scnp = 0;
  Elf_X_Shdr *plt_scnp = 0; 
  Elf_X_Shdr *got_scnp = 0;
  Elf_X_Shdr *dynsym_scnp = 0;
  Elf_X_Shdr *dynstr_scnp = 0;
  Elf_X_Shdr *dynamic_scnp = 0;
  Elf_X_Shdr *eh_frame_scnp = 0;
  Elf_X_Shdr *gcc_except = 0;
  Elf_X_Shdr *interp_scnp = 0;
  Elf_X_Shdr *opd_scnp = NULL;

  { // binding contour (for "goto cleanup2")

    // initialize "valid" regions of code and data segments
    code_vldS_ = (Offset) -1;
    code_vldE_ = 0;
    data_vldS_ = (Offset) -1;
    data_vldE_ = 0;

    if (!loaded_elf(txtaddr, dataddr, bssscnp, symscnp, strscnp,
            stabscnp, stabstrscnp, stabs_indxcnp, stabstrs_indxcnp,
            rel_plt_scnp, plt_scnp, got_scnp, dynsym_scnp, dynstr_scnp,
                    dynamic_scnp, eh_frame_scnp, gcc_except, interp_scnp, opd_scnp))
      goto cleanup2;

    if (interp_scnp)
      interpreter_name_ = (char *) interp_scnp->get_data().d_buf(); 

    addressWidth_nbytes = elfHdr->wordSize();

    // find code and data segments....
    find_code_and_data(*elfHdr, txtaddr, dataddr);

    get_valid_memory_areas(*elfHdr);

#if (defined(os_linux) || defined(os_freebsd)) && (defined(arch_x86) || defined(arch_x86_64))
    //fprintf(stderr, "[%s:%u] - Mod Name is %s\n", __FILE__, __LINE__, name.c_str());
    if (eh_frame_scnp != 0 && gcc_except != 0) {
      find_catch_blocks(eh_frame_scnp, gcc_except, 
            txtaddr, dataddr, catch_addrs_);
    }
#endif

#if defined(TIMED_PARSE)
    struct timeval starttime;
    gettimeofday(&starttime, NULL);
#endif

    if (alloc_syms) {
      // build symbol dictionary
      string module = mf->pathname();
      string name   = "DEFAULT_NAME";

      Elf_X_Data symdata, strdata;
      if (symscnp && strscnp)
    {
      symdata = symscnp->get_data();
      strdata = strscnp->get_data();
      if (!symdata.isValid() || !strdata.isValid()) {
        log_elferror(err_func_, "locating symbol/string data");
        goto cleanup2;
      }
      bool result = parse_symbols(symdata, strdata, bssscnp, symscnp, false, module);
      if (!result) {
        log_elferror(err_func_, "locating symbol/string data");
        goto cleanup2;
      }
    } 

      no_of_symbols_ = nsymbols();

      if (dynamic_addr_ && dynsym_scnp && dynstr_scnp)
    {
      symdata = dynsym_scnp->get_data();
      strdata = dynstr_scnp->get_data();
      parse_dynamicSymbols(dynamic_scnp, symdata, strdata, false, module);
    }

#if defined(TIMED_PARSE)
      struct timeval endtime;
      gettimeofday(&endtime, NULL);
      unsigned long lstarttime = starttime.tv_sec * 1000 * 1000 + starttime.tv_usec;
      unsigned long lendtime = endtime.tv_sec * 1000 * 1000 + endtime.tv_usec;
      unsigned long difftime = lendtime - lstarttime;
      double dursecs = difftime/(1000 * 1000);
      cout << "*INSERT SYMBOLS* elf took "<<dursecs <<" msecs" << endl;
      //cout << "parsing/fixing/overriding/insertion elf took "<<dursecs <<" msecs" << endl;
#endif
      if(dynamic_addr_ && dynsym_scnp && dynstr_scnp) {
    parseDynamic(dynamic_scnp, dynsym_scnp, dynstr_scnp);
      }

#if defined(os_vxworks)
      // Load relocations like they are PLT entries.
      // Use the non-dynamic symbol tables.
      if (rel_plt_scnp && symscnp && strscnp) {
          if (!get_relocation_entries(rel_plt_scnp, symscnp, strscnp))
              goto cleanup2;
      }
#endif

      if (rel_plt_scnp && dynsym_scnp && dynstr_scnp) {
         if (!get_relocation_entries(rel_plt_scnp,dynsym_scnp,dynstr_scnp)) { 
            goto cleanup2;
         }
      }

      parse_all_relocations(*elfHdr, dynsym_scnp, dynstr_scnp,
                symscnp, strscnp);
    // Apply relocations to opd
    handle_opd_relocations();    
    }

    //Set object type
    int e_type = elfHdr->e_type();
    if (e_type == ET_DYN) {
      obj_type_ = obj_SharedLib;
    }
    else if (e_type == ET_EXEC) {
      obj_type_ = obj_Executable;
    }else if( e_type == ET_REL ) {
        obj_type_ = obj_RelocatableFile;
    }


    if (opd_scnp) {
      parse_opd(opd_scnp);
    }

    // Set rel type based on the ELF machine type
    relType_ = getRelTypeByElfMachine(elfHdr);

  } // end binding contour (for "goto cleanup2")

 cleanup2: 
  {
  }
}

static Symbol::SymbolType pdelf_type(int elf_type)
{
  switch (elf_type) {
  case STT_FILE:   return Symbol::ST_MODULE;
  case STT_SECTION:return Symbol::ST_SECTION;
  case STT_OBJECT: return Symbol::ST_OBJECT;
  case STT_TLS:    return Symbol::ST_TLS;
  case STT_FUNC:   return Symbol::ST_FUNCTION;
  case STT_NOTYPE: return Symbol::ST_NOTYPE;
#if defined(STT_GNU_IFUNC)
  case STT_GNU_IFUNC: return Symbol::ST_INDIRECT;
#endif
  default: return Symbol::ST_UNKNOWN;
  }
}

static Symbol::SymbolLinkage pdelf_linkage(int elf_binding)
{
  switch (elf_binding) {
  case STB_LOCAL:  return Symbol::SL_LOCAL;
  case STB_WEAK:   return Symbol::SL_WEAK;
  case STB_GLOBAL: return Symbol::SL_GLOBAL;
  }
  return Symbol::SL_UNKNOWN;
}

static Symbol::SymbolVisibility pdelf_visibility(int elf_visibility)
{
  switch (elf_visibility) {
  case STV_DEFAULT:    return Symbol::SV_DEFAULT;
  case STV_INTERNAL:   return Symbol::SV_INTERNAL;
  case STV_HIDDEN:     return Symbol::SV_HIDDEN;
  case STV_PROTECTED:  return Symbol::SV_PROTECTED;
  }
  return Symbol::SV_UNKNOWN;
}

//============================================================================

//#include "dyninstAPI/src/arch.h"
//#include "dyninstAPI/src/inst.h"
//#include "dyninstAPI/src/instPoint.h" // includes instPoint-x86.h
//#include "dyninstAPI/src/instP.h" // class returnInstance
//#include "dyninstAPI/src/rpcMgr.h"

//linear search
bool lookUpSymbol( std::vector< Symbol *>& allsymbols, Offset& addr )
{
  for( unsigned i = 0; i < allsymbols.size(); i++ )
    {
      if( allsymbols[ i ]->getOffset() == addr )
    {
      return true;
    }
    }
  return false;
}

bool lookUpAddress( std::vector< Offset >& jumpTargets, Offset& addr )
{
  for( unsigned i = 0; i < jumpTargets.size(); i++ )
    {
      if( jumpTargets[ i ] == addr )
    {
      return true;
    }
    }
  return false;
}

//utitility function to print std::vector of symbols
void printSyms( std::vector< Symbol *>& allsymbols )
{
  for( unsigned i = 0; i < allsymbols.size(); i++ )
    {
      if( allsymbols[ i ]->getType() != Symbol::ST_FUNCTION )
    {
      continue;
    }
      cout << allsymbols[ i ] << endl;
    } 
} 

// Official Procedure Descriptor handler
//
// Some platforms (PPC64 Linux libc v2.1) only produce function
// symbols which point into the .opd section.  Find the actual
// function address in .text, and fix the symbol.
//
// Additionally, large binaries may contain multiple TOC values.
// Use the .opd section to determine the correct per-function TOC.
// See binutils' bfd/elf64-ppc.c for all the gory details.
//
// Symbol altering routines should be minimized to prevent problems
// in the rewrite case.  Instead, return a new symbol the encapsulates
// the correct information.

// In statically linked binaries, there are relocations against 
// .opd section. We need to apply the relocations before using
// opd symbols. 

void Object::parse_opd(Elf_X_Shdr *opd_hdr) {
  // If the OPD is filled in, parse it and fill in our TOC table
  assert(opd_hdr);

  Elf_X_Data data = opd_hdr->get_data();
  assert(data.isValid());
  
  // Let's read this puppy
  unsigned long *buf = (unsigned long *)data.d_buf();

  // In some cases, the OPD is a set of 3-tuples: <func offset, TOC, environment ptr>.
  // In others, it's a set of 2-tuples. Since we can't tell the difference, we
  // instead look for function offsets. 
  // Heck, it can even change within the opd!

  // In almost all cases, the TOC is the same. So let's store it at the
  // special location 0 and only record differences. 
  Offset baseTOC = buf[1];
  TOC_table_[0] = baseTOC;

  // Note the lack of 32/64 here: okay because the only platform with an OPD
  // is 64-bit elf. 
  unsigned i = 0;
  while (i < (data.d_size() / sizeof(unsigned long))) {
    Offset func = buf[i];
    Offset toc = buf[i+1];

    if (func == 0 && i != 0) break;

    if (symsByOffset_.find(func) == symsByOffset_.end()) {
      i++;
      continue;
    }

    if (toc != baseTOC) {
      TOC_table_[func] = toc;
    }
    i += 2;
  }
}

void Object::handle_opd_relocations(){

  unsigned int i = 0, opdregion = 0;
  while (i < regions_.size()) {
    if(regions_[i]->getRegionName().compare(".opd") == 0){
        opdregion = i;
        break;
    }
    i++;
   }

  vector<relocationEntry> region_rels = (regions_[opdregion])->getRelocations();
  vector<relocationEntry>::iterator rel_it;
  vector<Symbol *>::iterator sym_it;
  for(sym_it = opdsymbols_.begin(); sym_it != opdsymbols_.end(); ++sym_it) {
    for(rel_it = region_rels.begin(); rel_it != region_rels.end(); ++rel_it) {
      if((*sym_it)->getPtrOffset() == (*rel_it).rel_addr()) {
    i = 0;
    while (i < regions_.size()) {
      if(regions_[i]->getRegionName().compare((*rel_it).getDynSym()->getMangledName()) == 0){
        Region *targetRegion = regions_[i];
        Offset regionOffset = targetRegion->getDiskOffset()+(*rel_it).addend();
        (*sym_it)->setRegion(targetRegion);
        (*sym_it)->setOffset(regionOffset);   // Store code address for the function.
        break;
      }
      ++i;
    }
      }
    }
  }
  opdsymbols_.clear();
}

Symbol *Object::handle_opd_symbol(Region *opd, Symbol *sym)
{
  if (!sym) return NULL;

  Offset soffset = sym->getOffset();
  Offset *opd_entry = (Offset *)(((char *)opd->getPtrToRawData()) +
                                 (soffset - opd->getDiskOffset()));
  assert(opd->isOffsetInRegion(soffset));  // Symbol must be in .opd section.

  Symbol *retval = new Symbol(*sym); // Copy the .opd symbol.
  retval->setOffset(opd_entry[0]);   // Store code address for the function.
  retval->setLocalTOC(opd_entry[1]); // Store TOC address for this function.
  retval->setPtrOffset(soffset);     // Original address is the ptr address.

  // Find the appropriate region for the new symbol.
  unsigned int i = 0;
  while (i < regions_.size()) {
    if (regions_[i]->isOffsetInRegion(opd_entry[0])) {
      retval->setRegion(regions_[i]);
      break;
    }
    ++i;
  }
  assert(i < regions_.size());
  retval->setSymbolType(Symbol::ST_FUNCTION);
#if 0
  retval->tag_ = Symbol::TAG_INTERNAL;  // Not sure if this is an appropriate
                                        // use of the tag field, but we need
                                        // to mark this symbol somehow as a
                                        // fake.
#endif
  ///* DEBUG */ fprintf(stderr, "addr:0x%lx ptr_addr:0x%lx toc:0x%lx section:%s\n", opd_entry[0], soffset, opd_entry[1], regions_[i]->getRegionName().c_str());
  return retval;
}

// parse_symbols(): populate "allsymbols"
bool Object::parse_symbols(Elf_X_Data &symdata, Elf_X_Data &strdata,
                           Elf_X_Shdr* bssscnp,
                           Elf_X_Shdr* symscnp,
                           bool /*shared*/, string smodule)
{
#if defined(TIMED_PARSE)
   struct timeval starttime;
   gettimeofday(&starttime, NULL);
#endif

   if (!symdata.isValid() || !strdata.isValid()) {
      return false;
   }

   Elf_X_Sym syms = symdata.get_sym();
   const char *strs = strdata.get_string();
   if(syms.isValid()){
      for (unsigned i = 0; i < syms.count(); i++) {
         //If it is not a dynamic executable then we need undefined symbols
         //in symtab section so that we can resolve symbol references. So 
         //we parse & store undefined symbols only if there is no dynamic
         //symbol table
         //1/09: not so anymore--we want to preserve all symbols,
         //regardless of file type
      
         int etype = syms.ST_TYPE(i);
         int ebinding = syms.ST_BIND(i);
         int evisibility = syms.ST_VISIBILITY(i);

         // resolve symbol elements
         string sname = &strs[ syms.st_name(i) ];
         Symbol::SymbolType stype = pdelf_type(etype);
         Symbol::SymbolLinkage slinkage = pdelf_linkage(ebinding);
         Symbol::SymbolVisibility svisibility = pdelf_visibility(evisibility);
         unsigned ssize = syms.st_size(i);
         unsigned secNumber = syms.st_shndx(i);

         Offset soffset;
         if (symscnp->isFromDebugFile()) {
            Offset soffset_dbg = syms.st_value(i);
            soffset = soffset_dbg;
            if (soffset_dbg) {
               bool result = convertDebugOffset(soffset_dbg, soffset);
               if (!result) {
                  //Symbol does not match any section, can't convert
                  continue;
               }
            }
         }
         else {
            soffset = syms.st_value(i);
         }

         /* icc BUG: Variables in BSS are categorized as ST_NOTYPE instead of 
            ST_OBJECT.  To fix this, we check if the symbol is in BSS and has 
            size > 0. If so, we can almost always say it is a variable and hence, 
            change the type from ST_NOTYPE to ST_OBJECT.
         */
         if (bssscnp) {
            Offset bssStart = Offset(bssscnp->sh_addr());
            Offset bssEnd = Offset (bssStart + bssscnp->sh_size()) ;
            
            if(( bssStart <= soffset) && ( soffset < bssEnd ) && (ssize > 0) && 
               (stype == Symbol::ST_NOTYPE)) 
            {
               stype = Symbol::ST_OBJECT;
            }
         }

         // discard "dummy" symbol at beginning of file
         if (i==0 && sname == "" && soffset == (Offset)0)
            continue;


         Region *sec;
         if(secNumber >= 1 && secNumber < regions_.size()) {
            sec = regions_[secNumber];
         } else {
            sec = NULL;
         }
         int ind = int (i);
         int strindex = syms.st_name(i);

          if(stype == Symbol::ST_SECTION && sec != NULL) {
            sname = sec->getRegionName();
            soffset = sec->getDiskOffset();
          } 

         if (stype == Symbol::ST_MODULE) {
            smodule = sname;
         }
         Symbol *newsym = new Symbol(sname, 
                                     stype,
                                     slinkage, 
                                     svisibility, 
                                     soffset,
                                     NULL,
                                     sec, 
                                     ssize,
                                     false,
                                     (secNumber == SHN_ABS),
                                     ind,
                                     strindex,
                                     (secNumber == SHN_COMMON));

         if (stype == Symbol::ST_UNKNOWN)
            newsym->setInternalType(etype);

         if (sec && sec->getRegionName() == OPD_NAME && stype == Symbol::ST_FUNCTION ) {
            newsym = handle_opd_symbol(sec, newsym);

        opdsymbols_.push_back(newsym);
            symbols_[sname].push_back(newsym);
            symsByOffset_[newsym->getOffset()].push_back(newsym);
            symsToModules_[newsym] = smodule; 
         } else {
            symbols_[sname].push_back(newsym);
            symsByOffset_[newsym->getOffset()].push_back(newsym);
            symsToModules_[newsym] = smodule; 
    }

      }
   } // syms.isValid()
#if defined(TIMED_PARSE)
   struct timeval endtime;
   gettimeofday(&endtime, NULL);
   unsigned long lstarttime = starttime.tv_sec * 1000 * 1000 + starttime.tv_usec;
   unsigned long lendtime = endtime.tv_sec * 1000 * 1000 + endtime.tv_usec;
   unsigned long difftime = lendtime - lstarttime;
   double dursecs = difftime/(1000 * 1000);
   cout << "parsing elf took "<<dursecs <<" secs" << endl;
#endif
   return true;
}

// parse_symbols(): populate "allsymbols"
// Lazy parsing of dynamic symbol  & string tables
// Parsing the dynamic symbols lazily would certainly 
// not increase the overhead of the entire parse
void Object::parse_dynamicSymbols (Elf_X_Shdr *&
                                   dyn_scnp
                                   , Elf_X_Data &symdata,
                                   Elf_X_Data &strdata,
                                   bool /*shared*/, 
                                   std::string smodule)
{
#if defined(TIMED_PARSE)
  struct timeval starttime;
  gettimeofday(&starttime, NULL);
#endif

  Elf_X_Sym syms = symdata.get_sym();
  const char *strs = strdata.get_string();
  Elf_X_Shdr *versymSec = NULL, *verneedSec = NULL, *verdefSec = NULL;
  Elf_X_Data data = dyn_scnp->get_data();
  Elf_X_Dyn dyns = data.get_dyn();
  unsigned verneednum = 0, verdefnum = 0;
  Elf_X_Versym symVersions;
  Elf_X_Verdef *symVersionDefs = NULL;
  Elf_X_Verneed *symVersionNeeds = NULL;
  for (unsigned i = 0; i < dyns.count(); ++i) {
    switch(dyns.d_tag(i)) {
    case DT_NEEDED:
      deps_.push_back(&strs[dyns.d_ptr(i)]);
      break;
    case DT_VERSYM:
      versymSec = getRegionHdrByAddr(dyns.d_ptr(i));
      break;
    case DT_VERNEED:
      verneedSec = getRegionHdrByAddr(dyns.d_ptr(i));
      break;
    case DT_VERDEF:
      verdefSec = getRegionHdrByAddr(dyns.d_ptr(i));
      break;
    case DT_VERNEEDNUM:
      verneednum = dyns.d_ptr(i);
      break;
    case DT_VERDEFNUM:
      verdefnum = dyns.d_ptr(i);
      break;
    default:
      break;
    }
  }
  if(versymSec)
    symVersions = versymSec->get_data().get_versyms();
  if(verdefSec)
    symVersionDefs = verdefSec->get_data().get_verDefSym();
  if(verneedSec)
    symVersionNeeds = verneedSec->get_data().get_verNeedSym();
    
  for(unsigned i = 0; i < verdefnum ;i++) {
    Elf_X_Verdaux *aux = symVersionDefs->get_aux();
    for(unsigned j=0; j< symVersionDefs->vd_cnt(); j++){
      versionMapping[symVersionDefs->vd_ndx()].push_back(&strs[aux->vda_name()]);
      Elf_X_Verdaux *auxnext = aux->get_next();
      delete aux;
      aux = auxnext;
    }
    Elf_X_Verdef *symVersionDefsnext = symVersionDefs->get_next();
    delete symVersionDefs;
    symVersionDefs = symVersionDefsnext;
  }

  for(unsigned i = 0; i < verneednum; i++){
    Elf_X_Vernaux *aux = symVersionNeeds->get_aux();
    for(unsigned j=0; j< symVersionNeeds->vn_cnt(); j++){
      versionMapping[aux->vna_other()].push_back(&strs[aux->vna_name()]);
      versionFileNameMapping[aux->vna_other()] = &strs[symVersionNeeds->vn_file()];
      Elf_X_Vernaux *auxnext = aux->get_next();
      delete aux;
      aux = auxnext;
    }
    Elf_X_Verneed *symVersionNeedsnext = symVersionNeeds->get_next();
    delete symVersionNeeds;
    symVersionNeeds = symVersionNeedsnext;
  }
   
  if(syms.isValid()) {
    for (unsigned i = 0; i < syms.count(); i++) {
      int etype = syms.ST_TYPE(i);
      int ebinding = syms.ST_BIND(i);
      int evisibility = syms.ST_VISIBILITY(i);
      
      // resolve symbol elements
      string sname = &strs[ syms.st_name(i) ];
      Symbol::SymbolType stype = pdelf_type(etype);
      Symbol::SymbolLinkage slinkage = pdelf_linkage(ebinding);
      Symbol::SymbolVisibility svisibility = pdelf_visibility(evisibility);
      unsigned ssize = syms.st_size(i);
      Offset soffset = syms.st_value(i);
      unsigned secNumber = syms.st_shndx(i);

      // discard "dummy" symbol at beginning of file
      if (i==0 && sname == "" && soffset == (Offset)0)
         continue;
      
      Region *sec;
      if(secNumber >= 1 && secNumber < regions_.size()) {
         sec = regions_[secNumber];
      } else {
         sec = NULL;
      }

      int ind = int (i);
      int strindex = syms.st_name(i);

      if (stype == Symbol::ST_MODULE) {
         smodule = sname;
      }

      Symbol *newsym = new Symbol(sname, 
                                  stype, 
                                  slinkage, 
                                  svisibility, 
                                  soffset, 
                                  NULL,
                                  sec, 
                                  ssize, 
                                  true,  // is dynamic
                                  (secNumber == SHN_ABS),
                                  ind,
                                  strindex,
                                  (secNumber == SHN_COMMON));

      if (stype == Symbol::ST_UNKNOWN)
         newsym->setInternalType(etype);
      
      if(versymSec) {
    unsigned short raw = symVersions.get(i);
    bool hidden = raw >> 15;
    int index = raw & 0x7fff;
         if(versionFileNameMapping.find(index) != versionFileNameMapping.end()) {
       //printf("version filename for %s: %s\n", sname.c_str(),
       //versionFileNameMapping[index].c_str());
            newsym->setVersionFileName(versionFileNameMapping[index]);
         }
         if(versionMapping.find(index) != versionMapping.end()) {
       //printf("versions for %s: ", sname.c_str());
       //for (unsigned k=0; k < versionMapping[index].size(); k++)
       //printf(" %s", versionMapping[index][k].c_str());
       newsym->setVersions(versionMapping[index]);
       //printf("\n");
         }
     if (hidden) {
       newsym->setVersionHidden();
     }
      }
      // register symbol in dictionary

      if (sec && sec->getRegionName() == OPD_NAME && stype == Symbol::ST_FUNCTION ) {
         newsym = handle_opd_symbol(sec, newsym);
         opdsymbols_.push_back(newsym);
         
         symbols_[sname].push_back(newsym);
         symsByOffset_[newsym->getOffset()].push_back(newsym);
         symsToModules_[newsym] = smodule;
      } else {
         symbols_[sname].push_back(newsym);
         symsByOffset_[newsym->getOffset()].push_back(newsym);
         symsToModules_[newsym] = smodule; 
      }
    }
  }
  
#if defined(TIMED_PARSE)
  struct timeval endtime;
  gettimeofday(&endtime, NULL);
  unsigned long lstarttime = starttime.tv_sec * 1000 * 1000 + starttime.tv_usec;
  unsigned long lendtime = endtime.tv_sec * 1000 * 1000 + endtime.tv_usec;
  unsigned long difftime = lendtime - lstarttime;
  double dursecs = difftime/(1000 * 1000);
  cout << "parsing elf took "<<dursecs <<" secs" << endl;
#endif
}

#if defined(USES_DWARF_DEBUG)

string Object::find_symbol(string name)
{
  string name2;

  // pass #1: unmodified
  name2 = name;
  if (symbols_.find(name2)!=symbols_.end()) return name2;

  // pass #2: leading underscore (C)
  name2 = "_" + name;
  if (symbols_.find(name2)!=symbols_.end()) return name2;

  // pass #3: trailing underscore (Fortran)
  name2 = name + "_";
  if (symbols_.find(name2)!=symbols_.end())
    return name2;

  return "";
}

#endif


/********************************************************
 *
 * For object files only....
 *   read the .debug_info section to find the module of global symbols
 *   see documents...
 *   - "DWARF Debugging Information Format"
 *   - "A Consumer Libary Interface to DWARF"
 *
 ********************************************************/

#if defined(USES_DWARF_DEBUG)

void pd_dwarf_handler(Dwarf_Error error, Dwarf_Ptr /*userData*/)
{
  if (error == NULL)
    return;

  char *dwarf_msg = dwarf_errmsg(error);
  string str = string("DWARF Error: ")+ dwarf_msg;
  dwarf_err_func(str.c_str());
      
  //bperr( "DWARF error: %s\n", dwarf_msg);
}

Dwarf_Signed declFileNo = 0;
char ** declFileNoToName = NULL;

bool Object::fixSymbolsInModule( Dwarf_Debug dbg, string & moduleName, Dwarf_Die dieEntry)
{
 start: 

   Dwarf_Half dieTag;
   string useModuleName;
   int status = dwarf_tag( dieEntry, & dieTag, NULL );
   if (status != DW_DLV_OK) goto error;

   useModuleName = moduleName;

   /* For debugging. */
   Dwarf_Off dieOffset;
   status = dwarf_die_CU_offset( dieEntry, & dieOffset, NULL );
   if (status != DW_DLV_OK) goto error;

   switch( dieTag ) {
      case DW_TAG_subprogram: 
      case DW_TAG_entry_point: 
         {
            /* Let's try ignoring artificial entries, hmm-kay? */

            Dwarf_Bool isArtificial;
            status = dwarf_hasattr( dieEntry, DW_AT_artificial, & isArtificial, NULL );
            if (status != DW_DLV_OK) goto error;

            if ( isArtificial ) 
            {
               break; 
            }

            /* Only entries with a PC must be defining declarations.  However,
               to avoid trying to decide in which module a DW_TAG_inlined_subroutine's
               DW_AT_abstract_origin belongs, we just insert the abstract origin itself. */

            Dwarf_Bool hasLowPC;
            status = dwarf_hasattr( dieEntry, DW_AT_low_pc, & hasLowPC, NULL );
            if (status != DW_DLV_OK) goto error;

            Dwarf_Bool isAbstractOrigin;
            status = dwarf_hasattr( dieEntry, DW_AT_inline, & isAbstractOrigin, NULL );
            if (status != DW_DLV_OK) goto error;

            if ( ! hasLowPC && ! isAbstractOrigin ) 
            {
               break; 
            }

            bool isDeclaredNotInlined = false;

            /* Inline functions are "uninstrumentable", so leave them off the where axis. */

            if ( isAbstractOrigin ) 
            {
               Dwarf_Attribute inlineAttribute;
               status = dwarf_attr( dieEntry, DW_AT_inline, & inlineAttribute, NULL );
               if (status != DW_DLV_OK) goto error;

               Dwarf_Unsigned inlineTag;
               status = dwarf_formudata( inlineAttribute, & inlineTag, NULL );
               if (status != DW_DLV_OK) goto error;

               if ( inlineTag == DW_INL_inlined || inlineTag == DW_INL_declared_inlined ) 
               {
                  break; 
               }

               if ( inlineTag == DW_INL_declared_not_inlined ) 
               {
                  isDeclaredNotInlined = true; 
               }

               dwarf_dealloc( dbg, inlineAttribute, DW_DLA_ATTR );
            }

            /* If a DIE has a specification, the specification has its name
               and (optional) linkage name.  */

            Dwarf_Attribute specificationAttribute;
            status = dwarf_attr(dieEntry, DW_AT_specification, &specificationAttribute, NULL);

            if (status == DW_DLV_ERROR) goto error;


            Dwarf_Die nameEntry = dieEntry;

            if ( status == DW_DLV_OK ) 
            {
               Dwarf_Off specificationOffset;
               status = dwarf_global_formref(specificationAttribute, &specificationOffset, NULL);
               if (status != DW_DLV_OK) goto error;

               status = dwarf_offdie( dbg, specificationOffset, & nameEntry, NULL );
               if (status != DW_DLV_OK) goto error;

               dwarf_dealloc( dbg, specificationAttribute, DW_DLA_ATTR );
            } /* end if the DIE has a specification. */

            /* Ignore artificial entries. */

            status = dwarf_hasattr( nameEntry, DW_AT_artificial, & isArtificial, NULL );
            if (status != DW_DLV_OK) goto error;

            if ( isArtificial ) 
            {
               break; 
            }

            /* What's its name? */
            char * dieName = NULL;
            status = dwarf_diename( nameEntry, & dieName, NULL );
            if (status == DW_DLV_ERROR) goto error;

            /* Prefer the linkage (symbol table) name. */
            Dwarf_Attribute linkageNameAttribute;
            status = dwarf_attr(nameEntry, DW_AT_MIPS_linkage_name, &linkageNameAttribute, NULL);
            if (status == DW_DLV_ERROR) goto error;

            bool hasLinkageName = false;

            if ( status == DW_DLV_OK ) 
            {
               dwarf_dealloc( dbg, dieName, DW_DLA_STRING );
               status = dwarf_formstring( linkageNameAttribute, & dieName, NULL );
               if (status != DW_DLV_OK) goto error;
               hasLinkageName = true;
            }

            /* Anonymous functions are useless to us. */

            if ( dieName == NULL ) 
            {
               break;
            }

            /* Try to find the corresponding global symbol name. */

            Dwarf_Die declEntry = nameEntry;

            std::vector<Symbol *> foundSymbols;
            
            string globalSymbol = find_symbol(dieName);

            if (globalSymbol != "") {
               foundSymbols = symbols_[globalSymbol];
            }
            else if ( globalSymbol == "" && ! hasLinkageName && isDeclaredNotInlined ) 
            {
               /* Then scan forward for its concrete instance. */

               bool first = true;
               Dwarf_Die siblingDie = dieEntry;

               while ( true ) 
               {
                  Dwarf_Die priorSibling = siblingDie;
                  status = dwarf_siblingof( dbg, siblingDie, & siblingDie, NULL );
                  if (status == DW_DLV_ERROR) goto error;

                  if ( ! first ) 
                  {
                     dwarf_dealloc( dbg, priorSibling, DW_DLA_DIE ); 
                  }
                  if ( status == DW_DLV_NO_ENTRY ) 
                  {
                     break; 
                  }

                  Dwarf_Attribute abstractOriginAttr;
                  status = dwarf_attr(siblingDie, DW_AT_abstract_origin, &abstractOriginAttr, NULL);

                  if (status == DW_DLV_ERROR) goto error;

                  /* Is its abstract origin the current dieEntry? */

                  if ( status == DW_DLV_OK ) 
                  {
                     Dwarf_Off abstractOriginOffset;
                     status = dwarf_formref( abstractOriginAttr, & abstractOriginOffset, NULL );
                     if (status != DW_DLV_OK) goto error;

                     dwarf_dealloc( dbg, abstractOriginAttr, DW_DLA_ATTR );

                     if ( abstractOriginOffset == dieOffset ) 
                     {
                        Dwarf_Addr lowPC;
                        status = dwarf_lowpc( siblingDie, & lowPC, NULL );
                        if (status != DW_DLV_OK) goto error;

                        // bperr( "Found function with pretty name '%s' inlined-not-declared at 0x%lx in module '%s'\n", dieName, (unsigned long)lowPC, useModuleName.c_str() );

                        if ( symsByOffset_.find((Address)lowPC) != 
                             symsByOffset_.end()) {
                           foundSymbols = symsByOffset_[(Address)lowPC];
                        }

                        dwarf_dealloc( dbg, siblingDie, DW_DLA_DIE );
                        break;

                     } /* end if we've found _the_ concrete instance */
                  } /* end if we've found a concrete instance */

                  first = false;

               } /* end iteration. */
            } /* end if we're trying to do a by-address look up. */

            if (foundSymbols.size()) {
               /* If it's not specified, is an inlined function in the same
                  CU/namespace as its use. */
                
               if ( isDeclaredNotInlined && nameEntry != dieEntry ) {
                  /* Then the function's definition is where it was
                     declared, not wherever it happens to be referenced.
                       
                     Use the decl_file as the useModuleName, if available. */
                    
                  Dwarf_Attribute fileNoAttribute;
                  status = dwarf_attr( declEntry, DW_AT_decl_file, & fileNoAttribute, NULL );
                  if (status == DW_DLV_ERROR) goto error;

                    
                  if ( status == DW_DLV_OK ) {
                     Dwarf_Unsigned fileNo;
                     status = dwarf_formudata( fileNoAttribute, & fileNo, NULL );
                     if (status != DW_DLV_OK) goto error;
                        
                     dwarf_dealloc( dbg, fileNoAttribute, DW_DLA_ATTR );
                        
                     useModuleName = declFileNoToName[ fileNo - 1 ];

                     //create_printf("%s[%d]: Assuming declared-not-inlined function '%s' to be in module '%s'.\n", FILE__, __LINE__, dieName, useModuleName.c_str());
                        
                  } /* end if we have declaration file listed */
                  else {
                     /* This should never happen, but there's not much
                        we can do if it does. */
                  }
               } /* end if isDeclaredNotInlined */
                
               if (foundSymbols.size() == 1) {
                  symsToModules_[foundSymbols[0]] = useModuleName;
               }
               else {
                  for ( unsigned int i = 0; i < foundSymbols.size(); i++ ) {
                     if ( foundSymbols[ i ]->getLinkage() == Symbol::SL_GLOBAL ) {
                        symsToModules_[foundSymbols[i]] = useModuleName;
                     }
                  }
               }
            } /* end if we found the name in the global symbols */
            else if ( !isAbstractOrigin &&
                      (symbols_.find(dieName) != symbols_.end())) {
               std::vector< Symbol *> & syms = symbols_[ dieName ];

               /* If there's only one, apply regardless. */

               if ( syms.size() == 1 ) {
                  symsToModules_[syms[0]] = useModuleName;
               }
               else {
                  for ( unsigned int i = 0; i < syms.size(); i++ ) {
                     if ( syms[ i ]->getLinkage() == Symbol::SL_LOCAL ) {
                        symsToModules_[syms[i]] = useModuleName;
                     }
                  }
               }
            } /* end if we think it's a local symbol */
            dwarf_dealloc( dbg, dieName, DW_DLA_STRING );
         } 

         break;

      case DW_TAG_variable:
      case DW_TAG_constant: 
         {
            /* Is this a declaration? */

            Dwarf_Attribute declAttr;
            status = dwarf_attr( dieEntry, DW_AT_declaration, & declAttr, NULL );
            if (status == DW_DLV_ERROR) goto error;

            if ( status != DW_DLV_OK ) 
            { 
               break; 
            }

            dwarf_dealloc( dbg, declAttr, DW_DLA_ATTR );

            /* If a DIE has a specification, the specification has its name
               and (optional) linkage name.  */

            Dwarf_Attribute specificationAttribute;
            status = dwarf_attr(dieEntry, DW_AT_specification, &specificationAttribute, NULL);
            if (status == DW_DLV_ERROR) goto error;

            Dwarf_Die nameEntry = dieEntry;

            if ( status == DW_DLV_OK ) 
            {
               Dwarf_Off specificationOffset;
               status = dwarf_global_formref(specificationAttribute, &specificationOffset, NULL);
               if (status != DW_DLV_OK) goto error;

               dwarf_dealloc( dbg, specificationAttribute, DW_DLA_ATTR );

               status = dwarf_offdie( dbg, specificationOffset, & nameEntry, NULL );
               if (status != DW_DLV_OK) goto error;

            } /* end if the DIE has a specification. */

            /* What's its name? */

            char * dieName = NULL;
            status = dwarf_diename( nameEntry, & dieName, NULL );
            if (status == DW_DLV_ERROR) goto error;

            /* Prefer the linkage (symbol table) name. */

            Dwarf_Attribute linkageNameAttribute;
            status = dwarf_attr(nameEntry, DW_AT_MIPS_linkage_name, &linkageNameAttribute, NULL);
            if (status == DW_DLV_ERROR) goto error;

            if ( status == DW_DLV_OK ) 
            {
               dwarf_dealloc( dbg, dieName, DW_DLA_STRING );
               status = dwarf_formstring( linkageNameAttribute, & dieName, NULL );
               if (status != DW_DLV_OK) goto error;
            }

            /* Anonymous variables are useless to us. */
            if ( dieName == NULL ) 
            {
               break; 
            }

            /* Update the module information. */

            string symName = find_symbol(dieName);

            if ( symName != "" ) 
            {
               assert(symbols_.find(symName)!=symbols_.end());

               /* We're assuming global variables. */
               std::vector< Symbol *> & syms = symbols_[ symName ];

               /* If there's only one of symbol of that name, set it regardless. */
               if ( syms.size() == 1 ) {
                  symsToModules_[syms[0]] = useModuleName; 
               }
               else {
                  for ( unsigned int i = 0; i < syms.size(); i++ ) {
                     if ( syms[ i ]->getLinkage() == Symbol::SL_GLOBAL ) {
                        symsToModules_[syms[i]] = useModuleName;
                     }
                  }
               }
            }

            // /* DEBUG */ fprintf( stderr, "%s[%d]: DWARF-derived module %s for symbols of name '%s'\n", __FILE__, __LINE__, useModuleName.c_str(), symName.c_str() );

            dwarf_dealloc( dbg, dieName, DW_DLA_STRING );

         } 

         break;

      default:
         /* If it's not a function or a variable, ignore it. */
         break;
   } /* end tag switch */

   /* Recurse to its child, if any. */

   Dwarf_Die childDwarf;
   status = dwarf_child( dieEntry, & childDwarf, NULL );
   if (status == DW_DLV_ERROR) goto error;

   if ( status == DW_DLV_OK )  {
      fixSymbolsInModule(dbg, moduleName, childDwarf); 
   }

   /* Recurse to its sibling, if any. */

   Dwarf_Die siblingDwarf;
   status = dwarf_siblingof( dbg, dieEntry, & siblingDwarf, NULL );
   if (status == DW_DLV_ERROR) goto error;

   if ( status == DW_DLV_OK ) 
   {
      dwarf_dealloc( dbg, dieEntry, DW_DLA_DIE );

      /* Force tail-recursion to avoid stack overflows. */
      dieEntry = siblingDwarf;
      goto start;
   }
   else
   {
       dwarf_dealloc( dbg, dieEntry, DW_DLA_DIE );
       return true;
   }
 error:
 dwarf_dealloc( dbg, dieEntry, DW_DLA_DIE );
 return false;
} /* end fixSymbolsInModule */


unsigned Object::fixSymbolsInModuleByRange(IntervalTree<Dwarf_Addr, std::string> &modules) 
{
   if (modules.empty()) return 0;

   unsigned nsyms_altered = 0;
   
   for (dyn_hash_map<Offset, std::vector<Symbol *> >::iterator iter = symsByOffset_.begin();
        iter != symsByOffset_.end();
        iter++) {
      Offset off = iter->first;
      std::vector<Symbol *> &syms = iter->second;       
      
      std::string modname;
      if (modules.find((Dwarf_Addr) off, modname)) {
         for (unsigned i = 0; i < syms.size(); i++) {
            symsToModules_[syms[i]] = modname;
            nsyms_altered++;
         }
      }
   }

   return nsyms_altered;
}

bool Object::fix_global_symbol_modules_static_dwarf()
{ 
   int status;
   /* Initialize libdwarf. */
   Dwarf_Debug *dbg_ptr = dwarf->type_dbg();
   if (!dbg_ptr)
      return false;

   Dwarf_Debug &dbg = *dbg_ptr;

   Dwarf_Unsigned hdr;

   IntervalTree<Dwarf_Addr, std::string> module_ranges;

   /* Iterate over the CU headers. */
   while ( dwarf_next_cu_header_c( dbg, 1, 
                   NULL, NULL, NULL, // len, stamp, abbrev
                   NULL, NULL, NULL, // address, offset, extension
                   NULL, NULL, // signature, typeoffset
                   & hdr, NULL ) == DW_DLV_OK ) 
   {
      /* Obtain the module DIE. */
      Dwarf_Die moduleDIE;
      status = dwarf_siblingof( dbg, NULL, & moduleDIE, NULL );
      if (status != DW_DLV_OK) goto error;

      /* Make sure we've got the right one. */
      Dwarf_Half moduleTag;
      status = dwarf_tag( moduleDIE, & moduleTag, NULL);
      if (status != DW_DLV_OK) goto error;
      if (moduleTag != DW_TAG_compile_unit) goto error;

      /* Extract the name of this module. */
      char * dwarfModuleName = NULL;
      status = dwarf_diename( moduleDIE, & dwarfModuleName, NULL );
      if (status == DW_DLV_ERROR) goto error;

      string moduleName;

      if ( status == DW_DLV_NO_ENTRY || dwarfModuleName == NULL ) 
      {
         moduleName = string( "{ANONYMOUS}" );
      }
      else 
      {
         moduleName = extract_pathname_tail( string(dwarfModuleName) );
      }

      Dwarf_Addr modLowPC = 0;
      Dwarf_Addr modHighPC = (Dwarf_Addr)(-1);
      Dwarf_Bool hasLowPC = false;
      Dwarf_Bool hasHighPC = false;

      if (dwarf_hasattr(moduleDIE, DW_AT_low_pc, &hasLowPC, NULL) != DW_DLV_OK) {
         hasLowPC = false;
      }
      if (dwarf_hasattr(moduleDIE, DW_AT_high_pc, &hasHighPC, NULL) != DW_DLV_OK) {
         hasHighPC = false;
      }
      if (hasLowPC && hasHighPC) {
         // Get PC boundaries for the module, if present
         status = dwarf_lowpc(moduleDIE, &modLowPC, NULL);
         if (status != DW_DLV_OK) goto error;

         status = dwarf_highpc(moduleDIE, &modHighPC, NULL);
         if (status != DW_DLV_OK) goto error;

         if (modHighPC == 0) 
         {
            modHighPC = (Dwarf_Addr)(-1);
         }

         // Set module names for all symbols that belong to the range
         module_ranges.insert(modLowPC, modHighPC, moduleName);
      }
      else 
      {
         /* Acquire declFileNoToName. */
         status = dwarf_srcfiles( moduleDIE, & declFileNoToName, & declFileNo, NULL );
         if (status == DW_DLV_ERROR) goto error;

         if ( status == DW_DLV_OK ) 
         {
            /* Walk the tree. */

            //fprintf(stderr, "%s[%d]:  about to fixSymbolsInModule(%s,...)\n",
            //     FILE__, __LINE__, moduleName.c_str());

            bool result = fixSymbolsInModule(dbg, moduleName, moduleDIE);
            if (!result) goto error;
             
            /* Deallocate declFileNoToName. */
             
            for ( Dwarf_Signed i = 0; i < declFileNo; i++ ) {                
               dwarf_dealloc( dbg, declFileNoToName[i], DW_DLA_STRING );
            }

            dwarf_dealloc( dbg, declFileNoToName, DW_DLA_LIST );    

         } /* end if the srcfile information was available */
      } /* end if code range information unavailable */

      modules_.push_back(std::pair<std::string, Offset>(moduleName, modLowPC));
   } /* end scan over CU headers. */

   if (!module_ranges.empty()) {
      fixSymbolsInModuleByRange(module_ranges);
   }

   return true;
 error:
   return false;
}

#else

// dummy definition for non-DWARF platforms
bool Object::fix_global_symbol_modules_static_dwarf()
{ return false; }

#endif // USES_DWARF_DEBUG

/********************************************************
 *
 * For object files only....
 *  read the .stab section to find the module of global symbols
 *
 ********************************************************/

bool Object::fix_global_symbol_modules_static_stab(Elf_X_Shdr* stabscnp, Elf_X_Shdr* stabstrscnp) 
{
  // Read the stab section to find the module of global symbols.
  // The symbols appear in the stab section by module. A module begins
  // with a symbol of type N_UNDF and ends with a symbol of type N_ENDM.
  // All the symbols in between those two symbols belong to the module.

  if (!stabscnp || !stabstrscnp) return false;

  Elf_X_Data stabdata = stabscnp->get_data();
  Elf_X_Data stabstrdata = stabstrscnp->get_data();
  stab_entry *stabptr = NULL;

  if (!stabdata.isValid() || !stabstrdata.isValid()) return false;

  switch (addressWidth_nbytes) 
    {
    case 4:
      stabptr = new stab_entry_32(stabdata.d_buf(),
                  stabstrdata.get_string(),
                  stabscnp->sh_size() / sizeof(stab32));
      break;

    case 8:
      stabptr = new stab_entry_64(stabdata.d_buf(),
                  stabstrdata.get_string(),
                  stabscnp->sh_size() / sizeof(stab64));
      break;
    };

  const char *next_stabstr = stabptr->getStringBase();
  string module = "DEFAULT_MODULE";

  // the stabstr contains one string table for each module.
  // stabstr_offset gives the offset from the begining of stabstr of the
  // string table for the current module.

  bool is_fortran = false;  // is the current module fortran code?

  for (unsigned i = 0; i < stabptr->count(); i++) 
    {
      switch(stabptr->type(i)) 
    {
    case N_UNDF: /* start of object file */
      stabptr->setStringBase(next_stabstr);
      next_stabstr = stabptr->getStringBase() + stabptr->val(i);
      break;

    case N_ENDM: /* end of object file */
      is_fortran = false;
      module = "DEFAULT_MODULE";
      break;

    case N_SO: /* compilation source or file name */
      if ((stabptr->desc(i) == N_SO_FORTRAN) || (stabptr->desc(i) == N_SO_F90))
        is_fortran = true;

      module = string(stabptr->name(i));
      break;

    case N_ENTRY: /* fortran alternate subroutine entry point */
    case N_GSYM: /* global symbol */
      // the name string of a function or object appears in the stab 
      // string table as <symbol name>:<symbol descriptor><other stuff>
      // where <symbol descriptor> is a one char code.
      // we must extract the name and descriptor from the string
      {
        const char *p = stabptr->name(i);
        // bperr("got %d type, str = %s\n", stabptr->type(i), p);
        // if (stabptr->type(i) == N_FUN && strlen(p) == 0) {

        if (strlen(p) == 0) 
          {
        // GNU CC 2.8 and higher associate a null-named function
        // entry with the end of a function.  Just skip it.
        break;
          }

        const char *q = strchr(p,':');
        unsigned len;

        if (q) 
          {
        len = q - p;
          } 
        else 
          {
        len = strlen(p);
          }

        if (len == 0)
          {
        // symbol name is empty.Skip it.- 02/12/07 -Giri
        break;
          }     

        char *sname = new char[len+1];
        strncpy(sname, p, len);
        sname[len] = 0;

        string SymName = string(sname);

        // q points to the ':' in the name string, so 
        // q[1] is the symbol descriptor. We must check the symbol descriptor
        // here to skip things we are not interested in, such as prototypes.

        bool res = (symbols_.find(SymName)!=symbols_.end());

        if (!res && is_fortran) 
          {
        // Fortran symbols usually appear with an '_' appended in .symtab,
        // but not on .stab
        SymName += "_";
        res = (symbols_.find(SymName)!=symbols_.end());
          }

        if (res && (q == 0 || q[1] != SD_PROTOTYPE)) 
          {
        unsigned int count = 0;
        std::vector< Symbol *> & syms = symbols_[SymName];

        /* If there's only one, apply regardless. */
        if ( syms.size() == 1 ) 
                  { 
                     // TODO: set module
//          symbols_[SymName][0]->setModuleName(module); 
                  }
        else 
                  {
            for ( unsigned int i = 0; i < syms.size(); i++ ) 
              {
                        if ( syms[i]->getLinkage() == Symbol::SL_GLOBAL ) 
              {
                             // TODO: set module
//              symbols_[SymName][i]->setModuleName(module);
                count++;
              }
              }
          }
          }
        break;
      }
    case N_FUN: 
      /* function */ 
      {
        const char *p = stabptr->name(i);

        if (strlen(p) == 0) 
          {
        // Rumours are that GNU CC 2.8 and higher associate a
        // null-named function entry with the end of a
        // function. Just skip it.
        break;
          }

        const char *q = strchr(p,':');

        if (q == 0) 
          {
        // bperr( "Unrecognized stab format: %s\n", p);
        // Happens with the Solaris native compiler (.xstabs entries?)
        break;
          }

        if (q[1] == SD_PROTOTYPE) 
          {
        // We see a prototype, skip it
        break;
          }

        unsigned long entryAddr = stabptr->val(i);

        if (entryAddr == 0) 
          {
        // The function stab doesn't contain a function address
        // (happens with the Solaris native compiler). We have to
        // look up the symbol by its name. That's unfortunate, since
        // names may not be unique and we may end up assigning a wrong
        // module name to the symbol.
        unsigned len = q - p;
        if (len == 0)
                  {
            // symbol name is empty.Skip it.- 02/12/07 -Giri
            break;
                  }     

        char *sname = new char[len+1];
        strncpy(sname, p, len);
        sname[len] = 0;
        string nameFromStab = string(sname);
        delete[] sname;

        for (unsigned i = 0; i < symbols_[nameFromStab].size(); i++) {
          symsToModules_[symbols_[nameFromStab][i]] = module;
        }
          }
        else 
          {
        if (symsByOffset_.find(entryAddr)==symsByOffset_.end()) {
          //bperr( "fix_global_symbol_modules_static_stab "
          //       "can't find address 0x%lx of STABS entry %s\n", entryAddr, p);
          break;
        }
        for (unsigned i = 0; i < symsByOffset_[entryAddr].size(); i++) {
          symsToModules_[symsByOffset_[entryAddr][i]] = module;
        }
      }
        break;
      }

    default:
      /* ignore other entries */
      break;
    }
    }

  delete stabptr;

  return true;
}


// find_code_and_data(): populates the following members:
//   code_ptr_, code_off_, code_len_
//   data_ptr_, data_off_, data_len_
void Object::find_code_and_data(Elf_X &elf,
                Offset txtaddr, 
                Offset dataddr) 
{
    /* Note:
     * .o's don't have program headers, so these fields are populated earlier
     * when the sections are processed -> see loaded_elf()
     */

    for (int i = 0; i < elf.e_phnum(); ++i) {
        Elf_X_Phdr &phdr = elf.get_phdr(i);

        char *file_ptr = (char *)mf->base_addr();

        if(!isRegionPresent(phdr.p_paddr(), phdr.p_filesz(), phdr.p_flags())) {
            Region *reg = new Region(i, "", phdr.p_paddr(), phdr.p_filesz(),
                                     phdr.p_vaddr(), phdr.p_memsz(),
                                     &file_ptr[phdr.p_offset()],
                                     getSegmentPerms(phdr.p_flags()),
                                     getSegmentType(phdr.p_type(), phdr.p_flags()));
            reg->setFileOffset(phdr.p_offset());
            regions_.push_back(reg);
        }

        // The code pointer, offset, & length should be set even if
        // txtaddr=0, so in this case we set these values by
        // identifying the segment that contains the entryAddress
        if (((phdr.p_vaddr() <= txtaddr) && 
             (phdr.p_vaddr() + phdr.p_filesz() >= txtaddr)) || 
            (!txtaddr && ((phdr.p_vaddr() <= entryAddress_) &&
                          (phdr.p_vaddr() + phdr.p_filesz() >= entryAddress_)))) {

            if (code_ptr_ == 0 && code_off_ == 0 && code_len_ == 0) {
                code_ptr_ = (char *)(void*)&file_ptr[phdr.p_offset()];
                code_off_ = (Offset)phdr.p_vaddr();
                code_len_ = (unsigned)phdr.p_filesz();
            }

        } else if (((phdr.p_vaddr() <= dataddr) && 
                    (phdr.p_vaddr() + phdr.p_filesz() >= dataddr)) || 
                   (!dataddr && (phdr.p_type() == PT_LOAD))) {
            if (data_ptr_ == 0 && data_off_ == 0 && data_len_ == 0) {
                data_ptr_ = (char *)(void *)&file_ptr[phdr.p_offset()];
                data_off_ = (Offset)phdr.p_vaddr();
                data_len_ = (unsigned)phdr.p_filesz();
            }
        }
    }
    //if (addressWidth_nbytes == 8) bperr( ">>> 64-bit find_code_and_data() successful\n");
}

const char *Object::elf_vaddr_to_ptr(Offset vaddr) const
{
  const char *ret = NULL;
  unsigned code_size_ = code_len_;
  unsigned data_size_ = data_len_;

#if defined(os_irix)
  vaddr -= base_addr;
#endif

  if (vaddr >= code_off_ && vaddr < code_off_ + code_size_) {
    ret = ((char *)code_ptr_) + (vaddr - code_off_);
  } else if (vaddr >= data_off_ && vaddr < data_off_ + data_size_) {
    ret = ((char *)data_ptr_) + (vaddr - data_off_);
  } 

  return ret;
}

stab_entry *Object::get_stab_info() const
{
  char *file_ptr = (char *)mf->base_addr();

  // check that file has .stab info
  if (stab_off_ && stab_size_ && stabstr_off_) {
    switch (addressWidth_nbytes) {
    case 4: // 32-bit object
      return new stab_entry_32(file_ptr + stab_off_,
                   file_ptr + stabstr_off_,
                   stab_size_ / sizeof(stab32));
      break;
    case 8: // 64-bit object
      return new stab_entry_64(file_ptr + stab_off_,
                   file_ptr + stabstr_off_,
                   stab_size_ / sizeof(stab64));
      break;
    };
  }

  //fprintf(stderr, "%s[%d]:  WARNING:  FIXME, stab_off = %d, stab_size = %d, stabstr_off_ = %d\n", FILE__, __LINE__, stab_off_, stab_size_, stabstr_off_);
  return new stab_entry_64();
}

Object::Object(MappedFile *mf_, bool, void (*err_func)(const char *), 
           bool alloc_syms) :
  AObject(mf_, err_func), 
  hasReldyn_(false),
  hasReladyn_(false),
  hasRelplt_(false),
  hasRelaplt_(false),
  relType_(Region::RT_REL),
  opd_addr_(0),
  opd_size_(0),
  dwarf(NULL),
  EEL(false),
  DbgSectionMapSorted(false)
{

#if defined(TIMED_PARSE)
  struct timeval starttime;
  gettimeofday(&starttime, NULL);
#endif
  is_aout_ = false;
  did_open = false;
  interpreter_name_ = NULL;
  isStripped = false;

  if(mf->getFD() != -1) {
     elfHdr = Elf_X::newElf_X(mf->getFD(), ELF_C_READ, NULL, mf_->pathname());
  }
  else {
     elfHdr = Elf_X::newElf_X((char *)mf->base_addr(), mf->size(), mf_->pathname());
  }

  // ELF header: sanity check
  //if (!elfHdr->isValid()|| !pdelf_check_ehdr(elfHdr)) 
  if (!elfHdr->isValid())  {
    log_elferror(err_func_, "ELF header");
    has_error = true;
    return;
  }
  else if (!pdelf_check_ehdr(*elfHdr)) {
    log_elferror(err_func_, "ELF header failed integrity check");
    has_error = true;
    return;
  }

  dwarf = DwarfHandle::createDwarfHandle(mf_->pathname(), elfHdr);
  if( elfHdr->e_type() == ET_DYN )
    load_shared_object(alloc_syms);
  else if( elfHdr->e_type() == ET_REL || elfHdr->e_type() == ET_EXEC ) {
    // Differentiate between an executable and an object file
    if( elfHdr->e_phnum() ) is_aout_ = true;
    else is_aout_ = false;

    load_object(alloc_syms);
  }    
  else {
    log_perror(err_func_,"Invalid filetype in Elf header");
    has_error = true;
    return;
  }

#ifdef BINEDIT_DEBUG
  print_symbol_map(&symbols_);
#endif
#if defined(TIMED_PARSE)
  struct timeval endtime;
  gettimeofday(&endtime, NULL);
  unsigned long lstarttime = starttime.tv_sec * 1000 * 1000 + starttime.tv_usec;
  unsigned long lendtime = endtime.tv_sec * 1000 * 1000 + endtime.tv_usec;
  unsigned long difftime = lendtime - lstarttime;
  double dursecs = difftime/(1000 );
  cout << "obj parsing in Object-elf took "<<dursecs <<" msecs" << endl;
#endif
}

Object::Object(const Object& obj)
  : AObject(obj), 
    dwarf(NULL),
    EEL(false)
{
  interpreter_name_ = obj.interpreter_name_;
  isStripped = obj.isStripped;
  loadAddress_ = obj.loadAddress_;
  entryAddress_ = obj.entryAddress_;
  relocation_table_ = obj.relocation_table_;
  fbt_ = obj.fbt_;
  elfHdr = obj.elfHdr;
  deps_ = obj.deps_;
  DbgSectionMapSorted = obj.DbgSectionMapSorted;
  relType_ = obj.relType_;
}

Object::~Object()
{
  unsigned i;
  relocation_table_.clear();
  fbt_.clear();
  for(i=0; i<allRegionHdrs.size();i++) {
#if !defined(os_freebsd)
    // This claims a double-delete on FreeBSD
    delete allRegionHdrs[i];
#endif
  }
  allRegionHdrs.clear();
  versionMapping.clear();
  versionFileNameMapping.clear();
  deps_.clear();
}

void Object::log_elferror(void (*err_func)(const char *), const char* msg) 
{
  const char* err = elf_errmsg(elf_errno());
  err = err ? err: "(bad elf error)";
  string str = string(err)+string(msg);
  err_func(str.c_str());
}

bool Object::get_func_binding_table(std::vector<relocationEntry> &fbt) const 
{
#if !defined(os_vxworks)
  if(!plt_addr_ || (!fbt_.size())) return false;
#endif
  fbt = fbt_;
  return true;
}

bool Object::get_func_binding_table_ptr(const std::vector<relocationEntry> *&fbt) const 
{
  if(!plt_addr_ || (!fbt_.size())) return false;
  fbt = &fbt_;
  return true;
}

void Object::getDependencies(std::vector<std::string> &deps){
  deps = deps_;
}

bool Object::addRelocationEntry(relocationEntry &re)
{
  relocation_table_.push_back(re);
  return true;
}

#ifdef DEBUG

// stream-based debug output
const ostream &Object::dump_state_info(ostream &s) 
{
  s << "Debugging Information for Object (address) : " << this << endl;

  s << " <<begin debugging info for base object>>" << endl;
  AObject::dump_state_info(s);
  s << " <<end debuggingo info for base object>>" << endl;

  s << " dynsym_addr_ = " << dynsym_addr_ << endl;
  s << " dynstr_addr_ = " << dynstr_addr_ << endl;
  s << " got_addr_ = " << got_addr_ << endl;
  s << " plt_addr_ = " << plt_addr_ << endl;
  s << " plt_size_ = " << plt_size_ << endl;
  s << " plt_entry_size_ = " << plt_entry_size_ << endl;
  s << " rel_plt_addr_ = " << rel_plt_addr_ << endl; 
  s << " rel_plt_size_ = " << rel_plt_size_ << endl;
  s << " rel_plt_entry_size_ = " << rel_plt_entry_size_ << endl;
  s << " rel_size_ = " << rel_size_ << endl;
  s << " rel_entry_size_ = " << rel_entry_size_ << endl;
  s << " stab_off_ = " << stab_off_ << endl;
  s << " stab_size_ = " << stab_size_ << endl;
  s << " stabstr_off_ = " << stabstr_off_ << endl;
  s << " dwarvenDebugInfo = " << dwarvenDebugInfo << endl;

  // and dump the relocation table....
  s << " fbt_ = (field seperator :: )" << endl;   
  for (unsigned i=0; i < fbt_.size(); i++) {
    s << fbt_[i] << " :: "; 
  }
  s << endl;

  return s;
} 

#endif


Offset Object::getPltSlot(string funcName) const
{
  relocationEntry re;
  Offset offset=0;

  for ( unsigned int i = 0; i < fbt_.size(); i++ ){
    if (funcName == fbt_[i].name() ){
      offset =  fbt_[i].rel_addr();
    }
  }

  return offset;    
}

//
// get_valid_memory_areas - get ranges of code/data segments that have
//                       sections mapped to them
//

void Object::get_valid_memory_areas(Elf_X &elf)
{
  for (unsigned i = 0; i < elf.e_shnum(); ++i) {
    Elf_X_Shdr &shdr = elf.get_shdr(i);
    if ( !shdr.isValid()) { 
      break; 
    }
    if (shdr.sh_flags() & SHF_ALLOC) { // This section is in memory
      if (code_off_ <= shdr.sh_addr() &&
      shdr.sh_addr() <= code_off_ + code_len_) {
    if (shdr.sh_addr() < code_vldS_)
      code_vldS_ = shdr.sh_addr();
    if (shdr.sh_addr() + shdr.sh_size() > code_vldE_)
      code_vldE_ = shdr.sh_addr() + shdr.sh_size();

      } else if (data_off_ <= shdr.sh_addr() &&
         shdr.sh_addr() <= data_off_ + data_len_) {
    if (shdr.sh_addr() < data_vldS_)
      data_vldS_ = shdr.sh_addr();
    if (shdr.sh_addr() + shdr.sh_size() > data_vldE_)
      data_vldE_ = shdr.sh_addr() + shdr.sh_size();
      }
    }
  }
}

//
// parseCompilerType - parse for compiler that was used to generate object
//
//
//
#if defined(os_linux)
// Differentiating between g++ and pgCC by stabs info (as in the solaris/
// aix case, below) will not work; the gcc-compiled object files that
// get included at link time will fill in the N_OPT stabs line. Instead,
// look for "pgCC_compiled." symbols.
bool parseCompilerType(Object *objPtr)
{
  dyn_hash_map<string, std::vector<Symbol *> >*syms = objPtr->getAllSymbols();  
  if(syms->find("pgCC_compiled.") != syms->end())
    return true;
  return false; 
} 
#else
bool parseCompilerType(Object *objPtr) 
{
  stab_entry *stabptr = objPtr->get_stab_info();
  const char *next_stabstr = stabptr->getStringBase();

  for (unsigned int i=0; i < stabptr->count(); ++i) {
    // if (stabstrs) bperr("parsing #%d, %s\n", stabptr->type(i), stabptr->name(i));
    switch (stabptr->type(i)) {

    case N_UNDF: /* start of object file */
      /* value contains offset of the next string table for next module */
      // assert(stabptr.nameIdx(i) == 1);
      stabptr->setStringBase(next_stabstr);
      next_stabstr = stabptr->getStringBase() + stabptr->val(i);
      break;

    case N_OPT: /* Compiler options */
      delete stabptr;
      return false;
    }
  }
  delete stabptr;
  return false; // Shouldn't happen - maybe N_OPT stripped
}
#endif


#if (defined(os_linux) || defined(os_freebsd)) && (defined(arch_x86) || defined(arch_x86_64))

static unsigned long read_uleb128(const unsigned char *data, unsigned *bytes_read)
{
  unsigned long result = 0;
  unsigned shift = 0;
  *bytes_read = 0;
  while (1)
    {
      result |= (data[*bytes_read] & 0x7f) << shift;
      if ((data[(*bytes_read)++] & 0x80) == 0)
    break;
      shift += 7;
    }
  return result;
}

static signed long read_sleb128(const unsigned char *data, unsigned *bytes_read)
{
  unsigned long result = 0;
  unsigned shift = 0;
  *bytes_read = 0;
  while (1)
    {
      result |= (data[*bytes_read] & 0x7f) << shift;
      shift += 7;
      if ((data[*bytes_read] & 0x80) == 0)
    break;
      (*bytes_read)++;
    }
  if (shift < sizeof(int) && (data[*bytes_read] & 0x40))
    result |= -(1 << shift);
  (*bytes_read)++;
  return result;
}

#define DW_EH_PE_absptr  0x00
#define DW_EH_PE_uleb128 0x01
#define DW_EH_PE_udata2  0x02
#define DW_EH_PE_udata4  0x03
#define DW_EH_PE_udata8  0x04
#define DW_EH_PE_sleb128 0x09
#define DW_EH_PE_sdata2  0x0A
#define DW_EH_PE_sdata4  0x0B
#define DW_EH_PE_sdata8  0x0C
#define DW_EH_PE_pcrel   0x10
#define DW_EH_PE_textrel 0x20
#define DW_EH_PE_datarel 0x30
#define DW_EH_PE_funcrel 0x40
#define DW_EH_PE_aligned 0x50
#define DW_EH_PE_omit    0xff

typedef struct {
  int word_size;
  unsigned long pc;
  unsigned long text;
  unsigned long data;
  unsigned long func;
} mach_relative_info;

static int read_val_of_type(int type, unsigned long *value, const unsigned char *addr,
                const mach_relative_info &mi)
{
  unsigned size = 0;
  if (type == DW_EH_PE_omit)
    return 0;

  unsigned long base = 0x0;
  /**
   * LSB Standard says that the upper four bits (0xf0) encode the base.
   * Except that none of these values should their upper bits set,
   * and I'm finding the upper bit seems to sometimes contain garbage.
   * gcc uses the 0x70 bits in its exception parsing, so that's what we'll do.
   **/
  switch (type & 0x70)
    {
    case DW_EH_PE_pcrel:
      base = mi.pc;
      break;
    case DW_EH_PE_textrel:
      base = mi.text;
      break;
    case DW_EH_PE_datarel:
      base = mi.data;
      break;
    case DW_EH_PE_funcrel:
      base = mi.func;
      break;
    }

  switch (type & 0x0f)
    {
    case DW_EH_PE_absptr:
      if (mi.word_size == 4) {
    *value = (unsigned long) *((const uint32_t *) addr);
    size = 4;
      }
      else if (mi.word_size == 8) {
    *value = (unsigned long) *((const uint64_t *) addr);
    size = 8;
      }
      break;
    case DW_EH_PE_uleb128:
      *value = base + read_uleb128(addr, &size);
      break;
    case DW_EH_PE_sleb128:
      *value = base + read_sleb128(addr, &size);
      break;
    case DW_EH_PE_udata2:
      *value = base + *((const uint16_t *) addr);
      size = 2;
      break;
    case DW_EH_PE_sdata2:         
      *value = base + *((const int16_t *) addr);
      size = 2;
      break;
    case DW_EH_PE_udata4:
      *value = base + *((const uint32_t *) addr);
      size = 4;
      break;
    case DW_EH_PE_sdata4:
      *value = base + *((const int32_t *) addr);
      size = 4;
      break;
    case DW_EH_PE_udata8:
      *value = base + *((const uint64_t *) addr);
      size = 8;
      break;
    case DW_EH_PE_sdata8:
      *value = base + *((const int64_t *) addr);
      size = 8;
      break;
    default:
      return -1;
    }

  if ((type & 0x70) == DW_EH_PE_aligned)
    {
      if (mi.word_size == 4) {
    *value &= ~(0x3l);
      }
      else if (mi.word_size == 8) {
    *value &= ~(0x7l);
      }
    }

  return size;
}

/**
 * On GCC 3.x/x86 we find catch blocks as follows:
 *   1. We start with a list of FDE entries in the .eh_frame
 *      table.  
 *   2. Each FDE entry has a pointer to a  CIE entry.  The CIE
 *      tells us whether the FDE has any 'Augmentations', and
 *      the types of those augmentations.  The FDE also
 *      contains a pointer to a function.
 *   3. If one of the FDE augmentations is a 'Language Specific Data Area' 
 *      then we have a pointer to one or more entires in the gcc_except_table.
 *   4. The gcc_except_table contains entries that point 
 *      to try and catch blocks, all encoded as offsets
 *      from the function start (it doesn't tell you which
 *      function, however). 
 *   5. We can add the function offsets from the gcc_except_table
 *      to the function pointer from the FDE to get all of
 *      the try/catch blocks.  
 **/ 
#define SHORT_FDE_HLEN 4 
#define LONG_FDE_HLEN 12
static 
int read_except_table_gcc3(Dwarf_Fde *fde_data, Dwarf_Signed fde_count,
                           mach_relative_info &mi,
                           Elf_X_Shdr *eh_frame, Elf_X_Shdr *except_scn,
                           std::vector<ExceptionBlock> &addresses)
{
  Dwarf_Error err = (Dwarf_Error) NULL;
  Dwarf_Addr low_pc;
  Dwarf_Unsigned bytes_in_cie;
  Dwarf_Off fde_offset, cie_offset;
  Dwarf_Fde fde;
  Dwarf_Cie cie;
  int status, result, ptr_size;
  char *augmentor;
  unsigned char lpstart_format, ttype_format, table_format;
  unsigned long value, table_end, region_start, region_size;
  unsigned long catch_block, action, augmentor_len;
  Dwarf_Small *fde_augdata, *cie_augdata;
  Dwarf_Unsigned fde_augdata_len, cie_augdata_len;
   
  //For each FDE
  for (int i = 0; i < fde_count; i++) {
    unsigned int j;
    unsigned char lsda_encoding = 0xff, personality_encoding = 0xff;
    unsigned char *lsda_ptr = NULL;
    unsigned char *cur_augdata;
    unsigned long except_off;
    unsigned long fde_addr, cie_addr;
    unsigned char *fde_bytes, *cie_bytes;

    //Get the FDE
    status = dwarf_get_fde_n(fde_data, (Dwarf_Unsigned) i, &fde, &err);
    if (status != DW_DLV_OK) {
      pd_dwarf_handler(err, NULL);
      return false;
    }

    //After this set of computations we should have:
    // low_pc = mi.func = the address of the function that contains this FDE
    // fde_bytes = the start of the FDE in our memory space
    // cie_bytes = the start of the CIE in our memory space
    status = dwarf_get_fde_range(fde, &low_pc, NULL, (void **) &fde_bytes,
                 NULL, &cie_offset, NULL, 
                 &fde_offset, &err);
    if (status != DW_DLV_OK) {
      pd_dwarf_handler(err, NULL);
      return false;
    }
    //The LSB strays from the DWARF here, when parsing the except_eh section
    // the cie_offset is relative to the FDE rather than the start of the
    // except_eh section.
    cie_offset = fde_offset - cie_offset +
      (*(uint32_t*)fde_bytes == 0xffffffff ? LONG_FDE_HLEN : SHORT_FDE_HLEN);
    cie_bytes = (unsigned char *)eh_frame->get_data().d_buf() + cie_offset;

    //Get the CIE for the FDE
    status = dwarf_get_cie_of_fde(fde, &cie, &err);
    if (status != DW_DLV_OK) {
      pd_dwarf_handler(err, NULL);
      return false;
    }

    //Get the Augmentation string for the CIE
    status = dwarf_get_cie_info(cie, &bytes_in_cie, NULL, &augmentor, 
                NULL, NULL, NULL, NULL, NULL, &err); 
    if (status != DW_DLV_OK) {
      pd_dwarf_handler(err, NULL);
      return false;
    }
      
    //Check that the string pointed to by augmentor has a 'L',
    // meaning we have a LSDA
    augmentor_len = (augmentor == NULL) ? 0 : strlen(augmentor);
    for (j = 0; j < augmentor_len; j++) {
      if (augmentor[j] == 'L') {
    break;
      }
    }
    if (j == augmentor_len)
      //If we don't have a language specific data area, then
      // we don't care about this FDE.
      continue;

    //Some ptr encodings may be of type DW_EH_PE_pcrel, which means
    // that they're relative to their own location in the binary.  
    // We'll figure out where the FDE and CIE original load addresses
    // were and use those in pcrel computations.
    fde_addr = eh_frame->sh_addr() + fde_offset;
    cie_addr = eh_frame->sh_addr() + cie_offset;
      
    //Extract encoding information from the CIE.  
    // The CIE may have augmentation data, specified in the 
    // Linux Standard Base. The augmentation string tells us how
    // which augmentation data is present.  We only care about one 
    // field, a byte telling how the LSDA pointer is encoded.
    status = dwarf_get_cie_augmentation_data(cie, 
                         &cie_augdata,
                         &cie_augdata_len,
                         &err);
    if (status != DW_DLV_OK) {
      pd_dwarf_handler(err, NULL);
      return false;
    }

    cur_augdata = (unsigned char *) cie_augdata;
    lsda_encoding = DW_EH_PE_omit;
    for (j=0; j<augmentor_len; j++)
      {
    if (augmentor[j] == 'L')
      {
            lsda_encoding = *cur_augdata;
            cur_augdata++;
      }
    else if (augmentor[j] == 'P')
      {
            //We don't actually need the personality info, but we extract it 
            // anyways to make sure we properly extract the LSDA.
            personality_encoding = *cur_augdata;
            cur_augdata++;
            unsigned long personality_val;
            mi.pc = cie_addr + (unsigned long) (cur_augdata - cie_bytes);
            cur_augdata += read_val_of_type(personality_encoding, 
                                            &personality_val, cur_augdata, mi);
      }
    else if (augmentor[j] == 'z' || augmentor[j] == 'R')
      {
            //Do nothing, these don't affect the CIE encoding.
      }
    else
      {
            //Fruit, Someone needs to check the Linux Standard Base, 
            // section 11.6 (as of v3.1), to see what new encodings 
            // exist and how we should decode them in the CIE.
            break;
      }
      }
    if (lsda_encoding == DW_EH_PE_omit)
      continue;


    //Read the LSDA pointer out of the FDE.
    // The FDE has an augmentation area, similar to the above one in the CIE.
    // Where-as the CIE augmentation tends to contain things like bytes describing 
    // pointer encodings, the FDE contains the actual pointers.
    status = dwarf_get_fde_augmentation_data(fde, 
                         &fde_augdata,
                         &fde_augdata_len,
                         &err);
    if (status != DW_DLV_OK) {
      pd_dwarf_handler(err, NULL);
      return false;
    }
    cur_augdata = (unsigned char *) fde_augdata;
    for (j=0; j<augmentor_len; j++)
      {
    if (augmentor[j] == 'L')
      {
            unsigned long lsda_val;
            mi.pc = fde_addr + (unsigned long) (cur_augdata - fde_bytes);          
            ptr_size = read_val_of_type(lsda_encoding, &lsda_val, cur_augdata, mi);
            if (ptr_size == -1)
          break;
            lsda_ptr = (unsigned char *) lsda_val;
            cur_augdata += ptr_size;
      }
    else if (augmentor[j] == 'P' ||
         augmentor[j] == 'z' ||
         augmentor[j] == 'R')
      {
            //These don't affect the FDE augmentation data, do nothing
      }
    else
      {
            //See the comment for the 'else' case in the above CIE parsing
            break;
      }
      }
    if (!lsda_ptr)
      //Many FDE's have an LSDA area, but then have a NULL LSDA ptr.  
      // Just means there's no exception info here.
      continue;

    // Get the exception data from the section.
    Elf_X_Data data = except_scn->get_data();
    if (!data.isValid()) {
      return false;
    }

    const unsigned char *datap = (const unsigned char *) data.get_string();
    unsigned long int except_size = data.d_size();

    except_off = (unsigned long) (lsda_ptr - except_scn->sh_addr());
    if (except_off >= except_size) {
      continue;
    }

    // Read some variable length header info that we don't really
    // care about.
    lpstart_format = datap[except_off++];
    if (lpstart_format != DW_EH_PE_omit)
      except_off += read_val_of_type(DW_EH_PE_uleb128, &value, datap + except_off, mi);
    ttype_format = datap[except_off++];
    if (ttype_format != DW_EH_PE_omit)
      except_off += read_val_of_type(DW_EH_PE_uleb128, &value, datap + except_off, mi);

    // This 'type' byte describes the data format of the entries in the 
    // table and the format of the table_size field.
    table_format = datap[except_off++];
    mi.pc = except_scn->sh_addr() + except_off;
    result = read_val_of_type(table_format, &table_end, datap + except_off, mi);
    if (result == -1) {
      continue;
    }
    except_off += result;
    table_end += except_off;

    while (except_off < table_end && except_off < except_size) {
      //The entries in the gcc_except_table are the following format:
      //   <type>   region start
      //   <type>   region length
      //   <type>   landing pad
      //  uleb128   action
      //The 'region' is the try block, the 'landing pad' is the catch.
      mi.pc = except_scn->sh_addr() + except_off;
      except_off += read_val_of_type(table_format, &region_start, 
                     datap + except_off, mi);
      mi.pc = except_scn->sh_addr() + except_off;
      except_off += read_val_of_type(table_format, &region_size, 
                     datap + except_off, mi);
      mi.pc = except_scn->sh_addr() + except_off;
      except_off += read_val_of_type(table_format, &catch_block, 
                     datap + except_off, mi);
      except_off += read_val_of_type(DW_EH_PE_uleb128, &action, 
                     datap + except_off, mi);

      if (catch_block == 0)
    continue;
      ExceptionBlock eb(region_start + low_pc, (unsigned) region_size, 
            catch_block + low_pc);
      addresses.push_back(eb);
    }
  }

  return true;
}

/**
 * Things were much simpler in the old days.  On gcc 2.x
 * the gcc_except_table looks like:
 *   <long> try_start
 *   <long> try_end
 *   <long> catch_start
 * Where everything is an absolute address, even when compiled
 * with PIC.  All we got to do is read the catch_start entries
 * out of it.
 **/
static bool read_except_table_gcc2(Elf_X_Shdr *except_table, 
                                   std::vector<ExceptionBlock> &addresses,
                                   const mach_relative_info &mi)
{
  Offset try_start;
  Offset try_end;
  Offset catch_start;

  Elf_X_Data data = except_table->get_data();
  const unsigned char *datap = (const unsigned char *)data.get_string();
  unsigned long except_size = data.d_size();

  unsigned i = 0;
  while (i < except_size) {
    if (mi.word_size == 4) {
      i += read_val_of_type(DW_EH_PE_udata4, &try_start, datap + i, mi);
      i += read_val_of_type(DW_EH_PE_udata4, &try_end, datap + i, mi);
      i += read_val_of_type(DW_EH_PE_udata4, &catch_start, datap + i, mi);
    }
    else if (mi.word_size == 8) {
      i += read_val_of_type(DW_EH_PE_udata8, &try_start, datap + i, mi);
      i += read_val_of_type(DW_EH_PE_udata8, &try_end, datap + i, mi);
      i += read_val_of_type(DW_EH_PE_udata8, &catch_start, datap + i, mi);
    }

    if (try_start != (Offset) -1 && try_end != (Offset) -1) {
      ExceptionBlock eb(try_start, (unsigned) (try_end - try_start), catch_start);
      addresses.push_back(eb);
    }
  }
  return true;
}

struct  exception_compare: public binary_function<const ExceptionBlock &, const ExceptionBlock &, bool> 
{
  bool operator()(const ExceptionBlock &e1, const ExceptionBlock &e2) {
    if (e1.tryStart() < e2.tryStart())
      return true;
    return false;
  }
};

/**
 * Finds the addresses of catch blocks in a g++ generated elf file.
 *  'except_scn' should point to the .gcc_except_table section
 *  'eh_frame' should point to the .eh_frame section
 *  the addresses will be pushed into 'addresses'
 **/
bool Object::find_catch_blocks(Elf_X_Shdr *eh_frame, 
                   Elf_X_Shdr *except_scn, 
                   Address txtaddr, Address dataaddr,
                   std::vector<ExceptionBlock> &catch_addrs)
{
  Dwarf_Cie *cie_data;
  Dwarf_Fde *fde_data;
  Dwarf_Signed cie_count, fde_count;
  Dwarf_Error err = (Dwarf_Error) NULL;
  Dwarf_Unsigned bytes_in_cie;
  char *augmentor;
  int status, gcc_ver = 3;
  unsigned i;
  bool result = false;

  if (except_scn == NULL) {
    //likely to happen if we're not using gcc
    return true;
  }

  Dwarf_Debug *dbg_ptr = dwarf->frame_dbg();
  if (!dbg_ptr) {
    pd_dwarf_handler(err, NULL);
    return false;
  }
  Dwarf_Debug &dbg = *dbg_ptr;

  //Read the FDE and CIE information
  status = dwarf_get_fde_list_eh(dbg, &cie_data, &cie_count,
                 &fde_data, &fde_count, &err);
  if (status != DW_DLV_OK) {
    //fprintf(stderr, "[%s:%u] - No fde data\n", __FILE__, __LINE__);
    //No actual stackwalk info in this object
    return false;
  }
  //fprintf(stderr, "[%s:%u] - Found %d fdes\n", __FILE__, __LINE__, fde_count);

  mach_relative_info mi;
  mi.text = txtaddr;
  mi.data = dataaddr;
  mi.pc = 0x0;
  mi.func = 0x0;
  mi.word_size = eh_frame->wordSize();


  //GCC 2.x has "eh" as its augmentor string in the CIEs
  for (i = 0; i < cie_count; i++) {
    status = dwarf_get_cie_info(cie_data[i], &bytes_in_cie, NULL,
                &augmentor, NULL, NULL, NULL, NULL, NULL, &err);
    if (status != DW_DLV_OK) {
      pd_dwarf_handler(err, NULL);
      goto cleanup;
    }
    if (augmentor[0] == 'e' && augmentor[1] == 'h') {
      gcc_ver = 2;
    }
  }

  //Parse the gcc_except_table
  if (gcc_ver == 2) {
    result = read_except_table_gcc2(except_scn, catch_addrs, mi);

  } else if (gcc_ver == 3) {
    result = read_except_table_gcc3(fde_data, fde_count, mi,
                    eh_frame, except_scn, 
                    catch_addrs);
  }
  sort(catch_addrs.begin(),catch_addrs.end(),exception_compare());
  //VECTOR_SORT(catch_addrs, exception_compare);

 cleanup:
  //Unallocate fde and cie information 
  for (i = 0; i < cie_count; i++)
    dwarf_dealloc(dbg, cie_data[i], DW_DLA_CIE);
  for (i = 0; i < fde_count; i++)
    dwarf_dealloc(dbg, fde_data[i], DW_DLA_FDE);
  dwarf_dealloc(dbg, cie_data, DW_DLA_LIST);
  dwarf_dealloc(dbg, fde_data, DW_DLA_LIST);

  return result;
}

#endif

ObjectType Object::objType() const 
{
  return obj_type_;
}

void Object::getModuleLanguageInfo(dyn_hash_map<string, supportedLanguages> *mod_langs)
{ 
  string working_module;
  const char *ptr;
  // check .stabs section to get language info for modules:
  //   int stab_nsyms;
  //   char *stabstr_nextoffset;
  //   const char *stabstrs = 0;
   
  string mod_string;

  // This ugly flag is set when certain (sun) fortran compilers are detected.
  // If it is set at any point during the following iteration, this routine
  // ends with "backtrack mode" and reiterates through all chosen languages, changing
  // lang_Fortran to lang_Fortran_with_pretty_debug.
  //
  // This may be ugly, but it is set up this way since the information that is used
  // to determine whether this flag is set comes from the N_OPT field, which 
  // seems to come only once per image.  The kludge is that we assume that all
  // fortran sources in the module have this property (they probably do, but
  // could conceivably be mixed (???)).
  int fortran_kludge_flag = 0;
    
  // "state variables" we use to accumulate potentially useful information
  //  A final module<->language decision is not made until we have arrived at the
  //  next module entry, at which point we use any and all info we have to 
  //  make the most sensible guess
  supportedLanguages working_lang = lang_Unknown;
  char *working_options = NULL;
  const char *working_name = NULL;
   
  stab_entry *stabptr = NULL;
  const char *next_stabstr = NULL;
#if defined(TIMED_PARSE)
  struct timeval starttime;
  gettimeofday(&starttime, NULL);
#endif
   
  //Using the Object to get the pointers to the .stab and .stabstr
  // XXX - Elf32 specific needs to be in seperate file -- jkh 3/18/99
  stabptr = get_stab_info();
  next_stabstr = stabptr->getStringBase();
   
  for( unsigned int i = 0; i < stabptr->count(); i++ ) 
    {
      if (stabptr->type(i) == N_UNDF)
    {/* start of object file */
         /* value contains offset of the next string table for next module */
         // assert(stabptr->nameIdx(i) == 1);
      stabptr->setStringBase(next_stabstr);
      next_stabstr = stabptr->getStringBase() + stabptr->val(i); 
    }
      else if (stabptr->type(i) == N_OPT)
    {
      //  We can use the compiler option string (in a pinch) to guess at the source file language
      //  There is possibly more useful information encoded somewhere around here, but I lack
      //  an immediate reference....
      if (working_name)
            working_options = const_cast<char *>(stabptr->name(i)); 
    }
      else if ((stabptr->type(i) == N_SO)  || (stabptr->type(i) == N_ENDM))
    { /* compilation source or file name */
      // We have arrived at the next source file, finish up with the last one and reset state
      // before starting next


      //   XXXXXXXXXXX  This block is mirrored near the end of routine, if you edit it,
      //   XXXXXXXXXXX  change it there too.
      if  (working_name)
        {
          working_lang = pickLanguage(working_module, working_options, working_lang);
          if (working_lang == lang_Fortran_with_pretty_debug)
        fortran_kludge_flag = 1;
          (*mod_langs)[working_module] = working_lang;

        }
      //   XXXXXXXXXXX
    
      // reset "state" here
      working_lang = lang_Unknown;
      working_options = NULL;

      //  Now:  out with the old, in with the new

      if (stabptr->type(i) == N_ENDM)
        {
          // special case:
          // which is most likely both broken (and ignorable ???)
          working_name = "DEFAULT_MODULE";
        }
      else
        {
          working_name = stabptr->name(i);
          ptr = strrchr(working_name, '/');
          if (ptr)
        {
          ptr++;
          working_name = ptr;
        }
        }
      working_module = string(working_name);

      if ((mod_langs->find(working_module) != mod_langs->end()) && (*mod_langs)[working_module] != lang_Unknown) 
        {
          //  we already have a module with this name in the map.  If it has been given
          //  a language assignment (not lang_Unknown), we can just skip ahead
          working_name = NULL;
          working_options = NULL;
          continue;
        } 
      else 
        {
          //cerr << __FILE__ << __LINE__ << ":  Module: " <<working_module<< " has language "<< stabptr->desc(i) << endl;  
          switch (stabptr->desc(i))
        {
        case N_SO_FORTRAN: 
                  working_lang = lang_Fortran;
                  break;
        case N_SO_F90:
                  working_lang = lang_Fortran;  // not sure if this should be different from N_SO_FORTRAN
                  break;
        case N_SO_AS:
                  working_lang = lang_Assembly;
                  break;
        case N_SO_ANSI_C:
        case N_SO_C:
                  working_lang = lang_C;
                  break;
        case N_SO_CC:
                  working_lang = lang_CPlusPlus;
                  break;
        default:
                  //  currently uncovered options are lang_CMFortran, and lang_GnuCPlusPlus
                  //  do we need to make this kind of distinction here?
                  working_lang = lang_Unknown;
                  break;
        }
    
        } 
    } // end N_SO section
    } // for loop

  //  Need to make sure we finish up with the module we were last collecting information 
  //  about

  //   XXXXXXXXXXX  see note above (find the X's)
  if  (working_name)
    {
      working_lang = pickLanguage(working_module, working_options, working_lang);     
      if (working_lang == lang_Fortran_with_pretty_debug)
    fortran_kludge_flag = 1;
      (*mod_langs)[working_module] = working_lang;
    }
  //   XXXXXXXXXXX

  if (fortran_kludge_flag)
    {
      //  XXX  This code does not appear to be used anymore??  
      // go through map and change all lang_Fortran to lang_Fortran_with_pretty_symtab
      dyn_hash_map<string, supportedLanguages>::iterator iter = (*mod_langs).begin();
      string aname;
      supportedLanguages alang;
      for(;iter!=(*mod_langs).end();iter++)
    {
      aname = iter->first;
      alang = iter->second;
      if(lang_Fortran == alang)
        {
          (*mod_langs)[aname] = lang_Fortran_with_pretty_debug;
          //fprintf(stderr, "%s[%d]:  UPDATE: lang_Fortran->langFortran_with_pretty_debug\n", FILE__, __LINE__);
        }
    }
    }
#if defined(TIMED_PARSE)
  struct timeval endtime;
  gettimeofday(&endtime, NULL);
  unsigned long lstarttime = starttime.tv_sec * 1000 * 1000 + starttime.tv_usec;
  unsigned long lendtime = endtime.tv_sec * 1000 * 1000 + endtime.tv_usec;
  unsigned long difftime = lendtime - lstarttime;
  double dursecs = difftime/(1000 );
  cout << __FILE__ << ":" << __LINE__ <<": getModuleLanguageInfo took "<<dursecs <<" msecs" << endl;
#endif
  delete stabptr;

#if defined(cap_dwarf)
  if (hasDwarfInfo())
    {
      int status;
      Dwarf_Debug *dbg_ptr = dwarf->type_dbg();
      if (!dbg_ptr)
    return;
      Dwarf_Debug &dbg = *dbg_ptr;
      
      Dwarf_Unsigned hdr;      
      char * moduleName = NULL;
      Dwarf_Die moduleDIE = NULL;
      Dwarf_Attribute languageAttribute = NULL;
      bool done = false;

      while( !done && 
             dwarf_next_cu_header(dbg, NULL, NULL, NULL, NULL, & hdr, NULL) == DW_DLV_OK )
    {
      Dwarf_Half moduleTag;
      Dwarf_Unsigned languageConstant;

      status = dwarf_siblingof(dbg, NULL, &moduleDIE, NULL);
      if (status != DW_DLV_OK) {
            done = true;
            goto cleanup_dwarf;
      }
         
      status = dwarf_tag( moduleDIE, & moduleTag, NULL);
      if (status != DW_DLV_OK || moduleTag != DW_TAG_compile_unit) {
            done = true;
            goto cleanup_dwarf;
      }
         
      /* Extract the name of this module. */
      status = dwarf_diename( moduleDIE, & moduleName, NULL );
      if (status != DW_DLV_OK || !moduleName) {
            done = true;
            goto cleanup_dwarf;
      }
      ptr = strrchr(moduleName, '/');
      if (ptr)
            ptr++;
      else
            ptr = moduleName;
         
      working_module = string(ptr);
         
      status = dwarf_attr( moduleDIE, DW_AT_language, & languageAttribute, NULL );
      if (status == DW_DLV_ERROR) {
            done = true;
            goto cleanup_dwarf;
      }
            
      status = dwarf_formudata( languageAttribute, & languageConstant, NULL );
      if (status != DW_DLV_OK) {
            done = true;
            goto cleanup_dwarf;
      }
         
      switch( languageConstant )
        {
            case DW_LANG_C:
            case DW_LANG_C89:
          (*mod_langs)[working_module] = lang_C;
          break;
            case DW_LANG_C_plus_plus:
          (*mod_langs)[working_module] = lang_CPlusPlus;
          break;
            case DW_LANG_Fortran77:
            case DW_LANG_Fortran90:
            case DW_LANG_Fortran95:
          (*mod_langs)[working_module] = lang_Fortran;
          break;
            default:
          /* We know what the language is but don't care. */
          break;
        } /* end languageConstant switch */
    cleanup_dwarf:
      if (languageAttribute)
            dwarf_dealloc( dbg, languageAttribute, DW_DLA_ATTR );
      if (moduleName)
            dwarf_dealloc( dbg, moduleName, DW_DLA_STRING );
      if (moduleDIE)
            dwarf_dealloc( dbg, moduleDIE, DW_DLA_DIE );
      languageAttribute = NULL;
      moduleName = NULL;
      moduleDIE = NULL;
    }

    }
#endif

}

bool AObject::getSegments(vector<Segment> &segs) const
{
  unsigned i;
  for(i=0;i<regions_.size();i++)
    {
      if((regions_[i]->getRegionName() == ".text") || (regions_[i]->getRegionName() == ".init") || (regions_[i]->getRegionName() == ".fini") ||
     (regions_[i]->getRegionName() == ".rodata") || (regions_[i]->getRegionName() == ".plt") || (regions_[i]->getRegionName() == ".data"))
        {
      Segment seg;
      seg.data = regions_[i]->getPtrToRawData();
      seg.loadaddr = regions_[i]->getDiskOffset();
      seg.size = regions_[i]->getDiskSize();
      seg.name = regions_[i]->getRegionName();
      //            seg.segFlags = regions_[i]->getFlags();
      segs.push_back(seg);
        }
    }
  return true;
}

bool Object::emitDriver(Symtab *obj, string fName,
            std::vector<Symbol *>&allSymbols,
                        unsigned /*flag*/)
{
#ifdef BINEDIT_DEBUG
  printf("emitting...\n");
  //print_symbol_map(&symbols_);
  print_symbols(allSymbols);
  printf("%d total symbol(s)\n", allSymbols.size());
#endif
  if (elfHdr->e_ident()[EI_CLASS] == ELFCLASS32)
    {
      emitElf *em = new emitElf(elfHdr, isStripped, this, err_func_);
      if( !em->createSymbolTables(obj, allSymbols) ) return false;
      return em->driver(obj, fName);
    }
#if defined(x86_64_unknown_linux2_4) || \
    defined(ppc64_linux) || \
    (defined(os_freebsd) && defined(arch_x86_64))
  else if (elfHdr->e_ident()[EI_CLASS] == ELFCLASS64) 
    {
      emitElf64 *em = new emitElf64(elfHdr, isStripped, this, err_func_);
      if( !em->createSymbolTables(obj, allSymbols) ) return false;
      return em->driver(obj, fName);
    }
#endif
  return false;
}

const char *Object::interpreter_name() const 
{
  return interpreter_name_;
}

/* Parse everything in the file on disk, and cache that we've done so,
   because our modules may not bear any relation to the name source files. */
void Object::parseStabFileLineInfo(Symtab *st, dyn_hash_map<std::string, LineInformation> &li) 
{
  static dyn_hash_map< string, bool > haveParsedFileMap;

  /* We haven't parsed this file already, so iterate over its stab entries. */

  stab_entry * stabEntry = get_stab_info();
  assert( stabEntry != NULL );
  const char * nextStabString = stabEntry->getStringBase();

  const char * currentSourceFile = NULL;
  const char * moduleName = NULL;
  Function *currentFunction = NULL;
  Offset currentAddress = 0;
  unsigned currentLineBase = 0;
  unsigned functionLineToPossiblyAdd = 0;

  //Offset baseAddress = getBaseAddress();

  for ( unsigned int i = 0; i < stabEntry->count(); i++ ) 
    {
      switch (stabEntry->type( i )) 
    {
    case N_UNDF: /* start of an object file */ 
      {
        stabEntry->setStringBase( nextStabString );
        nextStabString = stabEntry->getStringBase() + stabEntry->val( i );

        currentSourceFile = NULL;
      }
      break;

    case N_SO: /* compilation source or file name */
      {
        const char * sourceFile = stabEntry->name( i );
        currentSourceFile = strrchr( sourceFile, '/' );

        if ( currentSourceFile == NULL ) 
          {
        currentSourceFile = sourceFile; 
          }
        else 
          { 
        ++currentSourceFile; 
          }

        moduleName = currentSourceFile;

        // /* DEBUG */ fprintf( stderr, "%s[%d]: using file name '%s'\n", __FILE__, __LINE__, currentSourceFile );
      }
      break;

    case N_SOL: /* file name (possibly an include file) */ 
      {
        const char * sourceFile = stabEntry->name( i );
        currentSourceFile = strrchr( sourceFile, '/' );
        if ( currentSourceFile == NULL ) 
          {
        currentSourceFile = sourceFile; 
          }
        else 
          {
        ++currentSourceFile; 
          }

        // /* DEBUG */ fprintf( stderr, "%s[%d]: using file name '%s'\n", __FILE__, __LINE__, currentSourceFile );
      }
      break;

    case N_FUN: /* a function */ 
      {
        //fprintf(stderr, "%s[%d]:  N_FUN [%s, %lu, %lu, %lu, %lu]\n", 
        //      FILE__, __LINE__, stabEntry->name(i) ? stabEntry->name(i) : "no_name",
        //      stabEntry->nameIdx(i), stabEntry->other(i), 
        //      stabEntry->desc(i), stabEntry->val(i));

        if ( *stabEntry->name( i ) == 0 ) 
          {
        currentFunction = NULL;
        currentLineBase = 0;
        //fprintf(stderr, "%s[%d]:  GOT EOF marker\n", FILE__, __LINE__);
        break;
          } /* end if the N_FUN is an end-of-function-marker. */

        std::vector<Function *> funcs;
        char stringbuf[2048];
        const char *stabstr = stabEntry->name(i);
        unsigned iter = 0;

        while (iter < 2048)
          {
        char c = stabstr[iter];

        if ( (c == ':')  || (c == '\0'))
                  {
            //stabstrs use ':' as delimiter
            stringbuf[iter] = '\0';
            break;
                  }

        stringbuf[iter] = c;

        iter++;
          }

        if (iter >= 2047) 
          {
        fprintf(stderr, "%s[%d]:  something went horribly awry\n", FILE__, __LINE__);
        continue;
          }
        else 
          {
        switch (stabstr[iter+1])
                  {
          case 'F':
          case 'f':
            //  A "good" function
            break;
          case 'P':
          case 'p':
            //  A prototype function? need to discard
            //fprintf(stderr, "%s[%d]:  discarding prototype %s\n", FILE__, __LINE__, stabstr);
            continue;
            break;
          default:
            fprintf(stderr, "%s[%d]:  discarding unknown %s, key = %c\n", 
                FILE__, __LINE__, stabstr, stabstr[iter +1]);
            continue;
            break;
                  };
          }

        if (! st->findFunctionsByName(funcs, std::string(stringbuf))
        || !funcs.size())
          {
        fprintf(stderr, "%s[%d]:  failed to find function with name %s\n", 
                        FILE__, __LINE__, stabEntry->name(i));
        continue;
          }

        if (funcs.size() > 1)
          {
              //  we see a lot of these on solaris (solaris only)
        fprintf(stderr, "%s[%d]:  WARN:  found %lu functions with name %s (stringbuf %s)\n", 
            FILE__, __LINE__, (unsigned long) funcs.size(), stabEntry->name(i), stringbuf);
          }

        currentFunction = funcs[0];
        currentLineBase = stabEntry->desc(i);
        functionLineToPossiblyAdd = currentLineBase;

        assert(currentFunction);
        currentAddress = currentFunction->getOffset();

      }
      break;

    case N_SLINE: 
      {
        unsigned current_col = 0;

        //fprintf(stderr, "%s[%d]:  N_SLINE [%s, %lu, %lu, %lu, %lu]\n", 
        // FILE__, __LINE__, stabEntry->name(i) ? stabEntry->name(i) : "no_name",
        // stabEntry->nameIdx(i), stabEntry->other(i), stabEntry->desc(i), 
        // stabEntry->val(i));

        if (!currentLineBase)
          {
        //fprintf(stderr, "%s[%d]:  skipping SLINE b/c no earlier line base\n", 
        //     FILE__, __LINE__);
        //fprintf(stderr, "%s[%d]:  N_FUN [%s, %lu, %lu, %lu, %lu]\n", 
        //      FILE__, __LINE__, stabEntry->name(last_fun) ? stabEntry->name(last_fun) : "no_name",
        //      stabEntry->nameIdx(last_fun), stabEntry->other(last_fun), 
        //      stabEntry->desc(last_fun), stabEntry->val(last_fun));
        //fprintf(stderr, "%s[%d]:  N_SLINE [%s, %lu, %lu, %lu, %lu]\n", 
        //      FILE__, __LINE__, stabEntry->name(i) ? stabEntry->name(i) : "no_name",
        //      stabEntry->nameIdx(i), stabEntry->other(i), stabEntry->desc(i), 
        //      stabEntry->val(i));
        continue;
          }

        unsigned newLineSpec = stabEntry->desc(i);

        //if (newLineSpec > (currentLineBase + 100)) 
        //{
        //fprintf(stderr, "%s[%d]:  FIXME???? newLineSpec = %d, currentLineBase = %d\n", FILE__, __LINE__, newLineSpec, currentLineBase);
        //}

        //  Addresses specified in SLINEs are relative to the beginning of the fn
        Offset newLineAddress = stabEntry->val(i) + currentFunction->getOffset();

        if (newLineAddress <= currentAddress)
          {
        //fprintf(stderr, "%s[%d]:  skipping addLine for bad address %lu <= %lu\n", 
        //     FILE__, __LINE__, newLineAddress, currentAddress);
        continue;
          }

        //  If we just got our first N_SLINE after a function definition
        //  its possible that the line number specified in the function 
        //  definition was less than the line number that we are currently on
        //  If so, add an additional line number entry that encompasses
        //  the line number of the original function definition in addition
        //  to this SLINE ( use the same address range)

        if (functionLineToPossiblyAdd)
          {
        if (functionLineToPossiblyAdd < newLineSpec)
                  {
            li[moduleName].addLine(currentSourceFile, 
                       functionLineToPossiblyAdd, 
                       current_col, currentAddress, 
                       newLineAddress );
                  }

        functionLineToPossiblyAdd = 0;
          }

        //fprintf(stderr, "%s[%d]:  addLine(%s:%d [%p-%p]\n", 
        //      FILE__, __LINE__, currentSourceFile, newLineSpec, 
        //      currentAddress, newLineAddress);

        li[moduleName].addLine(currentSourceFile, newLineSpec, 
                   current_col, currentAddress, 
                   newLineAddress );

        currentAddress = newLineAddress;
        currentLineBase = newLineSpec + 1;

      }
      break;

    } /* end switch on the ith stab entry's type */

    } /* end iteration over stab entries. */

  //  haveParsedFileMap[ key ] = true;
} /* end parseStabFileLineInfo() */

// Dwarf Debug Format parsing
void Object::parseDwarfFileLineInfo(dyn_hash_map<std::string, LineInformation> &li) 
{
    Dwarf_Debug *dbg_ptr = dwarf->line_dbg();
    if (!dbg_ptr)
        return; 
    Dwarf_Debug &dbg = *dbg_ptr;

    /* Itereate over the CU headers. */
    Dwarf_Unsigned header;
    while ( dwarf_next_cu_header( dbg, NULL, NULL, NULL, NULL, & header, NULL ) == DW_DLV_OK ) 
    {
        /* Acquire the CU DIE. */
        Dwarf_Die cuDIE;
        int status = dwarf_siblingof( dbg, NULL, & cuDIE, NULL);
        if ( status != DW_DLV_OK ) { 
            /* If we can get no (more) CUs, we're done. */
            break;
        }

        char * cuName;
        const char *moduleName;
        status = dwarf_diename( cuDIE, &cuName, NULL );
        if ( status == DW_DLV_NO_ENTRY ) {
            cuName = NULL;
            moduleName = "DEFAULT_MODULE";
        }
        else {
            moduleName = strrchr(cuName, '/');
            if (!moduleName)
                moduleName = strrchr(cuName, '\\');
            if (moduleName)
                moduleName++;
            else
                moduleName = cuName;
        }
        //fprintf(stderr, "[%s:%u] - llparsing for module %s\n", __FILE__, __LINE__, moduleName);

        /* Acquire this CU's source lines. */
        Dwarf_Line * lineBuffer;
        Dwarf_Signed lineCount;
        status = dwarf_srclines( cuDIE, & lineBuffer, & lineCount, NULL );

        /* See if we can get anything useful out of the next CU
           if this one is corrupt. */
        assert( status != DW_DLV_ERROR );

        /* It's OK for a CU not to have line information. */
        if ( status != DW_DLV_OK ) {
            /* Free this CU's DIE. */
            dwarf_dealloc( dbg, cuDIE, DW_DLA_DIE );
            continue;
        }
        assert( status == DW_DLV_OK );

        /* The 'lines' returned are actually interval markers; the code
           generated from lineNo runs from lineAddr up to but not including
           the lineAddr of the next line. */               
        bool isPreviousValid = false;
        Dwarf_Unsigned previousLineNo = 0;
        Dwarf_Signed previousLineColumn = 0;
        Dwarf_Addr previousLineAddr = 0x0;
        char * previousLineSource = NULL;

        //Offset baseAddr = obj()->codeBase();
        Offset baseAddr = getBaseAddress();

        /* Iterate over this CU's source lines. */
        for ( int i = 0; i < lineCount; i++ ) 
        {
            /* Acquire the line number, address, source, and end of sequence flag. */
            Dwarf_Unsigned lineNo;
            status = dwarf_lineno( lineBuffer[i], & lineNo, NULL );
            if ( status != DW_DLV_OK ) { continue; }

            Dwarf_Signed lineOff;
            status = dwarf_lineoff( lineBuffer[i], & lineOff, NULL );
            if ( status != DW_DLV_OK ) { lineOff = 0; }

            Dwarf_Addr lineAddr;
            status = dwarf_lineaddr( lineBuffer[i], & lineAddr, NULL );
            if ( status != DW_DLV_OK ) 
            { 
                fprintf(stderr, "%s[%d]:  dwarf_lineaddr() failed\n", FILE__, __LINE__);
                continue; 
            }

            lineAddr += baseAddr;

            if (dwarf->debugLinkFile()) {
                Offset new_lineAddr;
                bool result = convertDebugOffset(lineAddr, new_lineAddr);
                if (result)
                    lineAddr = new_lineAddr;
            }

            char * lineSource;
            status = dwarf_linesrc( lineBuffer[i], & lineSource, NULL );
            if ( status != DW_DLV_OK ) { continue; }

            Dwarf_Bool isEndOfSequence;
            status = dwarf_lineendsequence( lineBuffer[i], & isEndOfSequence, NULL );
            if ( status != DW_DLV_OK ) { continue; }

            if ( isPreviousValid ) 
            {
                /* If we're talking about the same (source file, line number) tuple,
                   and it isn't the end of the sequence, we can coalesce the range.
                   (The end of sequence marker marks discontinuities in the ranges.) */
                if ( lineNo == previousLineNo && strcmp( lineSource, previousLineSource ) == 0 
                        && ! isEndOfSequence ) 
                {
                    /* Don't update the prev* values; just keep going until we hit the end of 
                       a sequence or  new sourcefile. */
                    continue;
                } /* end if we can coalesce this range */

                char *canonicalLineSource;
                if (truncateLineFilenames) {
                    canonicalLineSource = strrchr( previousLineSource, '/' );
                    if( canonicalLineSource == NULL ) { canonicalLineSource = previousLineSource; }
                    else { ++canonicalLineSource; }
                }
                else {
                    canonicalLineSource = previousLineSource;
                }



                Dyninst::Offset startAddrToUse = previousLineAddr;
                Dyninst::Offset endAddrToUse = lineAddr;

            if (startAddrToUse && endAddrToUse)
            {
               //fprintf(stderr, "%s[%d]:  adding %s[%llu]: 0x%lx -> 0x%lx to line info\n", FILE__, __LINE__, canonicalLineSource, previousLineNo,  startAddrToUse, endAddrToUse);
               
               li[std::string(moduleName)].addLine(canonicalLineSource, 
                                                   (unsigned int) previousLineNo, 
                                                   (unsigned int) previousLineColumn, 
                                                   startAddrToUse, 
                                                   endAddrToUse );
            }
                /* The line 'canonicalLineSource:previousLineNo' has an address range of [previousLineAddr, lineAddr). */
            } /* end if the previous* variables are valid */

            /* If the current line ends the sequence, invalidate previous; otherwise, update. */
            if ( isEndOfSequence ) 
            {
                dwarf_dealloc( dbg, lineSource, DW_DLA_STRING );
                isPreviousValid = false;
            }
            else {
                if( isPreviousValid ) { dwarf_dealloc( dbg, previousLineSource, DW_DLA_STRING ); }
                previousLineNo = lineNo;
                previousLineSource = lineSource;
                previousLineAddr = lineAddr;
                previousLineColumn = lineOff;

                isPreviousValid = true;
            } /* end if line was not the end of a sequence */
        } /* end iteration over source line entries. */

        /* Free this CU's source lines. */
        for ( int i = 0; i < lineCount; i++ ) {
            dwarf_dealloc( dbg, lineBuffer[i], DW_DLA_LINE );
        }
        dwarf_dealloc( dbg, lineBuffer, DW_DLA_LIST );
        if (cuName)
            dwarf_dealloc( dbg, cuName, DW_DLA_STRING );  

        /* Free this CU's DIE. */
        dwarf_dealloc( dbg, cuDIE, DW_DLA_DIE );
    } /* end CU header iteration */
    /* Note that we've parsed this file. */
} /* end parseDwarfFileLineInfo() */

void Object::parseFileLineInfo(Symtab *st, dyn_hash_map<string, LineInformation> &li)
{
    parseStabFileLineInfo(st, li);
    parseDwarfFileLineInfo(li);
}

void Object::parseTypeInfo(Symtab *obj)
{
#if defined(TIMED_PARSE)
    struct timeval starttime;
    gettimeofday(&starttime, NULL);
#endif   

    parseStabTypes(obj);

   DwarfWalker walker(obj, *(dwarf->type_dbg()));
   walker.parse();
   //parseDwarfTypes(obj);
        
#if defined(TIMED_PARSE)
    struct timeval endtime;
    gettimeofday(&endtime, NULL);
    unsigned long lstarttime = starttime.tv_sec * 1000 * 1000 + starttime.tv_usec;
    unsigned long lendtime = endtime.tv_sec * 1000 * 1000 + endtime.tv_usec;
    unsigned long difftime = lendtime - lstarttime;
    double dursecs = difftime/(1000 );
    cout << __FILE__ << ":" << __LINE__ <<": parseTypes("<< obj->file()
        <<") took "<< dursecs <<" msecs" << endl;
#endif   
}

void Object::parseStabTypes(Symtab *obj)
{
    types_printf("Entry to parseStabTypes for %s\n", obj->name().c_str());
    stab_entry *stabptr = NULL;
    const char *next_stabstr = NULL;

    unsigned i;
    char *modName = NULL;
    string temp;
    char *ptr = NULL, *ptr2 = NULL, *ptr3 = NULL;
    bool parseActive = false;

    std::string *currentFunctionName = NULL;
    Symbol *commonBlockVar = NULL;
    string *commonBlockName = NULL;
    typeCommon *commonBlock = NULL;
    int mostRecentLinenum = 0;

  Module *mod;
  typeCollection *tc = NULL;

#if defined(TIMED_PARSE)
  struct timeval starttime;
  gettimeofday(&starttime, NULL);
  unsigned int pss_count = 0;
  double pss_dur = 0;
  unsigned int src_count = 0;
  double src_dur = 0;
  unsigned int fun_count = 0;
  double fun_dur = 0;
  struct timeval t1, t2;
#endif


  stabptr = get_stab_info();
  if (!stabptr) {
    types_printf("\tWarning: no stab ptr, returning immediately\n");
    return;
  }

  //Using the Object to get the pointers to the .stab and .stabstr
  // XXX - Elf32 specific needs to be in seperate file -- jkh 3/18/99
  next_stabstr = stabptr->getStringBase();
  types_printf("\t Parsing %d stab entries\n", stabptr->count());
  for (i=0; i<stabptr->count(); i++) {
    switch(stabptr->type(i)){
    case N_UNDF: /* start of object file */
      /* value contains offset of the next string table for next module */
      // assert(stabptr->nameIdx(i) == 1);
      stabptr->setStringBase(next_stabstr);
      next_stabstr = stabptr->getStringBase() + stabptr->val(i);

      //N_UNDF is the start of object file. It is time to
      //clean source file name at this moment.
      /*
    if(currentSourceFile){
    delete currentSourceFile;
    currentSourceFile = NULL;
    delete absoluteDirectory;
    absoluteDirectory = NULL;
    delete currentFunctionName;
    currentFunctionName = NULL;
    currentFileInfo = NULL;
    currentFuncInfo = NULL;
    }
      */
      break;
           
    case N_ENDM: /* end of object file */
      break;
           
    case N_SO: /* compilation source or file name */
           /* bperr("Resetting CURRENT FUNCTION NAME FOR NEXT OBJECT FILE\n");*/
#ifdef TIMED_PARSE
      src_count++;
      gettimeofday(&t1, NULL);
#endif
      symt_current_func_name = ""; // reset for next object file
      symt_current_mangled_func_name = ""; // reset for next object file
      symt_current_func = NULL;

      modName = const_cast<char*>(stabptr->name(i));
      // cerr << "checkpoint B" << endl;
      ptr = strrchr(modName, '/');
      //  cerr << "checkpoint C" << endl;
      if (ptr) {
    ptr++;
    modName = ptr;
      }
      if (obj->findModuleByName(mod, modName)) {
          tc = typeCollection::getModTypeCollection(mod);
    parseActive = true;
    if (!mod) {
      fprintf(stderr, "%s[%d]:  FIXME\n", FILE__, __LINE__);
    }
    else if (!tc) 
      {
        fprintf(stderr, "%s[%d]:  FIXME\n", FILE__, __LINE__);
      }
    else 
        tc->clearNumberedTypes();
      } 
      else {
    //parseActive = false;
    mod = obj->getDefaultModule();
    tc = typeCollection::getModTypeCollection(mod);
    types_printf("\t Warning: failed to find module name matching %s, using %s\n", modName, mod->fileName().c_str());
      }

#ifdef TIMED_PARSE
      gettimeofday(&t2, NULL);
      src_dur += (t2.tv_sec - t1.tv_sec)*1000.0 + (t2.tv_usec - t1.tv_usec)/1000.0;
      //src_dur += (t2.tv_sec/1000 + t2.tv_usec*1000) - (t1.tv_sec/1000 + t1.tv_usec*1000) ;
#endif
      break;
    case N_SLINE:
      mostRecentLinenum = stabptr->desc(i);
      break;
    default:
      break;
    }
    if(parseActive || !is_aout()) {
      std::vector<Symbol *> bpfv;
      switch(stabptr->type(i)){
      case N_FUN:
#ifdef TIMED_PARSE
    fun_count++;
    gettimeofday(&t1, NULL);
#endif
    //all we have to do with function stabs at this point is to assure that we have
    //properly set the var currentFunctionName for the later case of (parseActive)
    symt_current_func = NULL;
    int currentEntry = i;
    int funlen = strlen(stabptr->name(currentEntry));
    ptr = new char[funlen+1];
    strcpy(ptr, stabptr->name(currentEntry));
    while(strlen(ptr) != 0 && ptr[strlen(ptr)-1] == '\\'){
      ptr[strlen(ptr)-1] = '\0';
      currentEntry++;
      strcat(ptr,stabptr->name(currentEntry));
    }
    char* colonPtr = NULL;
    if(currentFunctionName) delete currentFunctionName;
    if(!ptr || !(colonPtr = strchr(ptr,':')))
      currentFunctionName = NULL;
    else {
      char* tmp = new char[colonPtr-ptr+1];
      strncpy(tmp,ptr,colonPtr-ptr);
      tmp[colonPtr-ptr] = '\0';
      currentFunctionName = new string(tmp);
      // Shouldn't this be a function name lookup?
      std::vector<Symbol *>syms;
      if(!obj->findSymbol(syms, 
                    *currentFunctionName, 
                    Symbol::ST_FUNCTION,
                    mangledName)) {
        if(!obj->findSymbol(syms, 
                      "_"+*currentFunctionName, 
                      Symbol::ST_FUNCTION,
                      mangledName)) {
          string fortranName = *currentFunctionName + string("_");
          if (obj->findSymbol(syms, 
                    fortranName,
                    Symbol::ST_FUNCTION,
                    mangledName)) {
        delete currentFunctionName;
        currentFunctionName = new string(fortranName);
          }
        }
      }
      syms.clear();
      delete[] tmp;
    }
    delete[] ptr;
#ifdef TIMED_PARSE
    gettimeofday(&t2, NULL);
    fun_dur += (t2.tv_sec - t1.tv_sec)*1000.0 + (t2.tv_usec - t1.tv_usec)/1000.0;
    //fun_dur += (t2.tv_sec/1000 + t2.tv_usec*1000) - (t1.tv_sec/1000 + t1.tv_usec*1000);
#endif
    break;
      }
      if (!parseActive) continue;
      switch(stabptr->type(i)){
      case N_BCOMM:     {
    // begin Fortran named common block
    string tmp = string(stabptr->name(i));
    commonBlockName = &tmp;
    // find the variable for the common block

    //TODO? change this. findLocalVar will cause an infinite loop
    std::vector<Symbol *>vars;
    if(!obj->findSymbol(vars, 
                  *commonBlockName, 
                  Symbol::ST_OBJECT,
                  mangledName)) {
      if(!obj->findSymbol(vars, 
                    *commonBlockName, 
                    Symbol::ST_OBJECT,
                    mangledName,
                    true))
        commonBlockVar = NULL;
      else
        commonBlockVar = vars[0];
    }
    else
      commonBlockVar = vars[0];
    if (!commonBlockVar) {
      // //bperr("unable to find variable %s\n", commonBlockName);
    } else {
      commonBlock = dynamic_cast<typeCommon *>(tc->findVariableType(*commonBlockName));
      if (commonBlock == NULL) {
        // its still the null type, create a new one for it
        commonBlock = new typeCommon(*commonBlockName);
        tc->addGlobalVariable(*commonBlockName, commonBlock);
      }
      // reset field list
      commonBlock->beginCommonBlock();
    }
    break;
      }
      case N_ECOMM: {
    //copy this set of fields
    assert(currentFunctionName);
    if(!obj->findSymbol(bpfv, 
                  *currentFunctionName, 
                  Symbol::ST_FUNCTION,
                  mangledName)) {
      if(!obj->findSymbol(bpfv, 
                    *currentFunctionName, 
                    Symbol::ST_FUNCTION, 
                    mangledName,
                    true)){
        // //bperr("unable to locate current function %s\n", currentFunctionName->c_str());
      }
      else{
        Symbol *func = bpfv[0];
        commonBlock->endCommonBlock(func, (void *)commonBlockVar->getOffset());
      }    
    } else {
      if (bpfv.size() > 1) {
        // warn if we find more than one function with this name
        // //bperr("%s[%d]:  WARNING: found %d funcs matching name %s, using the first\n",
        //                     __FILE__, __LINE__, bpfv.size(), currentFunctionName->c_str());
      }
      Symbol *func = bpfv[0];
      commonBlock->endCommonBlock(func, (void *)commonBlockVar->getOffset());
    }
    //TODO?? size for local variables??
    //       // update size if needed
    //       if (commonBlockVar)
    //           commonBlockVar->setSize(commonBlock->getSize());
    commonBlockVar = NULL;
    commonBlock = NULL;
    break;
      }
    // case C_BINCL: -- what is the elf version of this jkh 8/21/01
    // case C_EINCL: -- what is the elf version of this jkh 8/21/01
      case 32:    // Global symbols -- N_GYSM
      case 38:    // Global Static -- N_STSYM
      case N_FUN:
      case 128:   // typedefs and variables -- N_LSYM
      case 160:   // parameter variable -- N_PSYM
      case 0xc6:  // position-independant local typedefs -- N_ISYM
      case 0xc8: // position-independant external typedefs -- N_ESYM
#ifdef TIMED_PARSE
    pss_count++;
    gettimeofday(&t1, NULL);
#endif
    if (stabptr->type(i) == N_FUN) symt_current_func = NULL;
    ptr = const_cast<char *>(stabptr->name(i));
    while (ptr[strlen(ptr)-1] == '\\') {
      //ptr[strlen(ptr)-1] = '\0';
      ptr2 =  const_cast<char *>(stabptr->name(i+1));
      ptr3 = (char *) malloc(strlen(ptr) + strlen(ptr2) + 1);
      strcpy(ptr3, ptr);
      ptr3[strlen(ptr)-1] = '\0';
      strcat(ptr3, ptr2);
      ptr = ptr3;
      i++;
      // XXX - memory leak on multiple cont. lines
    }
    // bperr("stab #%d = %s\n", i, ptr);
    // may be nothing to parse - XXX  jdd 5/13/99
            
    if (parseCompilerType(this))
      temp = parseStabString(mod, mostRecentLinenum, (char *)ptr, stabptr->val(i), commonBlock);
    else
      temp = parseStabString(mod, stabptr->desc(i), (char *)ptr, stabptr->val(i), commonBlock);
    if (temp.length()) {
      //Error parsing the stabstr, return should be \0
      // //bperr( "Stab string parsing ERROR!! More to parse: %s\n",
      //                                  temp.c_str());
      // //bperr( "  symbol: %s\n", ptr);
    }
#ifdef TIMED_PARSE
    gettimeofday(&t2, NULL);
    pss_dur += (t2.tv_sec - t1.tv_sec)*1000.0 + (t2.tv_usec - t1.tv_usec)/1000.0;
    //      pss_dur += (t2.tv_sec/1000 + t2.tv_usec*1000) - (t1.tv_sec/1000 + t1.tv_usec*1000);
#endif
    break;
      default:
    break;
      }             
    }
  }
#if defined(TIMED_PARSE)
  struct timeval endtime;
  gettimeofday(&endtime, NULL);
  unsigned long lstarttime = starttime.tv_sec * 1000 * 1000 + starttime.tv_usec;
  unsigned long lendtime = endtime.tv_sec * 1000 * 1000 + endtime.tv_usec;
  unsigned long difftime = lendtime - lstarttime;
  double dursecs = difftime/(1000 );
  cout << __FILE__ << ":" << __LINE__ <<": parseTypes("<< mod->fileName()
       <<") took "<<dursecs <<" msecs" << endl;
  cout << "Breakdown:" << endl;
  cout << "     Functions: " << fun_count << " took " << fun_dur << "msec" << endl;
  cout << "     Sources: " << src_count << " took " << src_dur << "msec" << endl;
  cout << "     parseStabString: " << pss_count << " took " << pss_dur << "msec" << endl;
  cout << "     Total: " << pss_dur + fun_dur + src_dur
       << " msec" << endl;
#endif
} 

bool sort_dbg_map(const Object::DbgAddrConversion_t &a, 
                  const Object::DbgAddrConversion_t &b)
{
  return (a.dbg_offset < b.dbg_offset);
}

bool Object::convertDebugOffset(Offset off, Offset &new_off)
{
  if (!DbgSectionMapSorted) {
    std::sort(DebugSectionMap.begin(), DebugSectionMap.end(), sort_dbg_map);
    DbgSectionMapSorted = true;
  }

  int hi = DebugSectionMap.size();
  int low = 0;
  int cur = -1;

  for (;;) {
    int last_cur = cur;
    cur = (low + hi) / 2;
    if (cur == last_cur) {
      new_off = off;
      return true;
    }
      
    const DbgAddrConversion_t &cur_d = DebugSectionMap[cur];
      
    if (off >= cur_d.dbg_offset && off < cur_d.dbg_offset+cur_d.dbg_size) {
      new_off = off - cur_d.dbg_offset + cur_d.orig_offset;
      return true;
    }
    else if (off > cur_d.dbg_offset)
      {
    low = cur;
      }
    else if (off < cur_d.dbg_offset)
      {
    hi = cur;
      }
  }

}

void Object::insertPrereqLibrary(std::string libname)
{
   prereq_libs.insert(libname);
}

bool Object::removePrereqLibrary(std::string libname)
{
   rmd_deps.push_back(libname);
   return true;
}

std::vector<std::string> &Object::libsRMd()
{
   return rmd_deps;
}

void Object::insertDynamicEntry(long name, long value)
{
   new_dynamic_entries.push_back(std::pair<long, long>(name, value));
}

// Parses sections with relocations and links these relocations to
// existing symbols
bool Object::parse_all_relocations(Elf_X &elf, Elf_X_Shdr *dynsym_scnp,
        Elf_X_Shdr *dynstr_scnp, Elf_X_Shdr *symtab_scnp,
        Elf_X_Shdr *strtab_scnp) {

   //const char *shnames = pdelf_get_shnames(*elfHdr);
    // Setup symbol table access
    Offset dynsym_offset = 0;
    Elf_X_Data dynsym_data, dynstr_data;    
    Elf_X_Sym dynsym;
    const char *dynstr = NULL;
    if( dynsym_scnp && dynstr_scnp ) {
        dynsym_offset = dynsym_scnp->sh_offset();
        dynsym_data = dynsym_scnp->get_data();
        dynstr_data = dynstr_scnp->get_data();
        if( !(dynsym_data.isValid() && dynstr_data.isValid()) ) {
            return false;
        }
        dynsym = dynsym_data.get_sym();
        dynstr = dynstr_data.get_string();
    }

    Offset symtab_offset = 0;
    Elf_X_Data symtab_data, strtab_data;
    Elf_X_Sym symtab;
    const char *strtab = NULL;
    if( symtab_scnp && strtab_scnp) {
       symtab_offset = symtab_scnp->sh_offset();
       symtab_data = symtab_scnp->get_data();
       strtab_data = strtab_scnp->get_data();
       if( !(symtab_data.isValid() && strtab_data.isValid()) ) {
           return false;
       }
       symtab = symtab_data.get_sym();
       strtab = strtab_data.get_string();
    }

    if( dynstr == NULL && strtab == NULL ) return false;

    // Symbols are only truly uniquely idenfitied by their index in their
    // respective symbol table (this really applies to the symbols associated
    // with sections) So, a map for each symbol table needs to be built so a
    // relocation can be associated with the correct symbol
    dyn_hash_map<int, Symbol *> symtabByIndex;
    dyn_hash_map<int, Symbol *> dynsymByIndex;

    dyn_hash_map<std::string, std::vector<Symbol *> >::iterator symVec_it;
    for(symVec_it = symbols_.begin(); symVec_it != symbols_.end(); ++symVec_it) {
        std::vector<Symbol *>::iterator sym_it;
        for(sym_it = symVec_it->second.begin(); sym_it != symVec_it->second.end(); ++sym_it) {
            // Skip any symbols pointing to the undefined symbol entry
      if( (*sym_it)->getIndex() == STN_UNDEF ) {
        continue;
      }
      if( (*sym_it)->tag() == Symbol::TAG_INTERNAL ) {
        continue;
      }

            std::pair<dyn_hash_map<int, Symbol *>::iterator, bool> result;
            if( (*sym_it)->isInDynSymtab() ) {
                result = dynsymByIndex.insert(std::make_pair((*sym_it)->getIndex(), (*sym_it)));
            }else{
                result = symtabByIndex.insert(std::make_pair((*sym_it)->getIndex(), (*sym_it)));
            }

            // A symbol should be uniquely identified by its index in the symbol table
            assert(result.second);
        }
    }

    // Build mapping from section headers to Regions
    std::vector<Region *>::iterator reg_it;
    dyn_hash_map<unsigned, Region *> shToRegion;
    for(reg_it = regions_.begin(); reg_it != regions_.end(); ++reg_it) {
        std::pair<dyn_hash_map<unsigned, Region *>::iterator, bool> result;
        result = shToRegion.insert(std::make_pair((*reg_it)->getRegionNumber(), (*reg_it)));
    }

    for(unsigned i = 0; i < elf.e_shnum(); ++i) {
        Elf_X_Shdr *shdr = allRegionHdrsByShndx[i];
        if( shdr->sh_type() != SHT_REL && shdr->sh_type() != SHT_RELA ) continue;

        Elf_X_Data reldata = shdr->get_data();
        Elf_X_Rel rel = reldata.get_rel();
        Elf_X_Rela rela = reldata.get_rela();

        Elf_X_Shdr *curSymHdr = allRegionHdrsByShndx[shdr->sh_link()];

    // Apparently, relocation entries may not have associated symbols. 

        for(unsigned j = 0; j < (shdr->sh_size() / shdr->sh_entsize()); ++j) {
            // Relocation entry fields - need to be populated

            Offset relOff, addend = 0;
            std::string name;
            unsigned long relType;
            Region::RegionType regType;

            long symbol_index;
            switch(shdr->sh_type()) {
                case SHT_REL:
                    relType = rel.R_TYPE(j);
                    relOff = rel.r_offset(j);
                    symbol_index = rel.R_SYM(j);
                    regType = Region::RT_REL;
                    break;
                case SHT_RELA:
                    relType = rela.R_TYPE(j);
                    relOff = rela.r_offset(j);
                    symbol_index = rela.R_SYM(j);
                    regType = Region::RT_RELA;
                    addend = rela.r_addend(j);
                    break;
                default:
                    continue;
            }

            // Determine which symbol table to use
            Symbol *sym = NULL;
            // Use dynstr to ensure we've initialized dynsym...
            if( dynstr && curSymHdr->sh_offset() == dynsym_offset ) {
               name = string( &dynstr[dynsym.st_name(symbol_index)] );

                dyn_hash_map<int, Symbol *>::iterator sym_it;
                sym_it = dynsymByIndex.find(symbol_index);
                if( sym_it != dynsymByIndex.end() ) {
                    sym = sym_it->second;
            if(sym->getType() == Symbol::ST_SECTION) {
            name = sym->getRegion()->getRegionName().c_str();
                }        
                }
            }else if( strtab && curSymHdr->sh_offset() == symtab_offset ) {
                name = string( &strtab[symtab.st_name(symbol_index)] );
                dyn_hash_map<int, Symbol *>::iterator sym_it;
                sym_it = symtabByIndex.find(symbol_index);
                if( sym_it != symtabByIndex.end() ) {
                    sym = sym_it->second;
            if(sym->getType() == Symbol::ST_SECTION) {
            name = sym->getRegion()->getRegionName().c_str();
            }
                }
            }

        Region *region = NULL;
            dyn_hash_map<unsigned, Region *>::iterator shToReg_it;
            shToReg_it = shToRegion.find(i);
            if( shToReg_it != shToRegion.end() ) {
          region = shToReg_it->second;
            }
        
            assert(region != NULL);

            relocationEntry newrel(0, relOff, addend, name, sym, relType, regType);
            region->addRelocationEntry(newrel);
            // relocations are also stored with their targets
            // Need to find target region
        if (sym) {
          if (shdr->sh_info() != 0) {
        Region *targetRegion = NULL;
        shToReg_it = shToRegion.find(shdr->sh_info());
        if( shToReg_it != shToRegion.end() ) {
          targetRegion = shToReg_it->second;
        }
        assert(targetRegion != NULL);
        targetRegion->addRelocationEntry(newrel);
          }
        }
        
        }
    }

    return true;
}

bool Region::isStandardCode()
{
   return ((getRegionPermissions() == RP_RX || getRegionPermissions() == RP_RWX) &&
           ((name_ == std::string(".text")) ||
            (name_ == std::string(".init")) ||
            (name_ == std::string(".fini"))));
}

void Object::setTruncateLinePaths(bool value)
{
   truncateLineFilenames = value;
}

bool Object::getTruncateLinePaths()
{
   return truncateLineFilenames;
}

Dyninst::Architecture Object::getArch()
{
#if defined(arch_power)
   if (getAddressWidth() == 4) {
      return Dyninst::Arch_ppc32;
   }
   return Dyninst::Arch_ppc64;
#elif defined(arch_x86) || defined(arch_x86_64)
   if (getAddressWidth() == 4) {
      return Dyninst::Arch_x86;
   }
   return Dyninst::Arch_x86_64;
#else
   return Arch_none;
#endif
}

Offset Object::getTOCoffset(Offset off) const {
  if (TOC_table_.empty()) return 0;
  Offset baseTOC = TOC_table_.find(0)->second;
  // We only store exceptions to the base TOC, so if we can't find it
  // return the base

  std::map<Offset, Offset>::const_iterator iter = TOC_table_.find(off);
  if (iter == TOC_table_.end()) {
    return baseTOC;
  }
  return iter->second;
}

void Object::setTOCoffset(Offset off) {
  TOC_table_.clear();
  TOC_table_[0] = off;
}

void Object::getSegmentsSymReader(vector<SymSegment> &segs) {
   for (unsigned i = 0; i < elfHdr->e_phnum(); ++i) {
      Elf_X_Phdr &phdr = elfHdr->get_phdr(i);
      
      SymSegment seg;
      seg.file_offset = phdr.p_offset();
      seg.mem_addr = phdr.p_vaddr();
      seg.file_size = phdr.p_filesz();
      seg.mem_size = phdr.p_memsz();
      seg.type = phdr.p_type();
      seg.perms = phdr.p_flags() & 0x7;

      segs.push_back(seg);
   }
}