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/*------------------------------------------------------------------------------
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-- This file is a part of the SocExplorer Software
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-- Copyright (C) 2013, Plasma Physics Laboratory - CNRS
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-------------------------------------------------------------------------------*/
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/*-- Author : Alexis Jeandet
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-- Mail : alexis.jeandet@lpp.polytechnique.fr
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----------------------------------------------------------------------------*/
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#include "elfparser.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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extern QString elfresolveMachine(Elf64_Half e_machine);
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elfparser::elfparser()
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{
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this->opened = false;
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this->type_elf = false;
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this->elfFile = (int)NULL;
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this->e = NULL;
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}
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int elfparser::setFilename(const QString &name)
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{
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this->closeFile();
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if(elf_version(EV_CURRENT)==EV_NONE)return 0;
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#ifdef _ELF_WINDOWS_
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this->elfFile = open(name.toStdString().c_str(),O_RDONLY|O_BINARY ,0);
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#else
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this->elfFile = open(name.toStdString().c_str(),O_RDONLY ,0);
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#endif
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if(this->elfFile==(int)NULL)return 0;
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this->e = elf_begin(this->elfFile,ELF_C_READ,NULL);
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if(this->e==NULL)return 0;
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this->ek = elf_kind(this->e);
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gelf_getehdr (this->e, &this->ehdr );
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elf_getshdrstrndx (this->e, &this->shstrndx);
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this->updateSegments();
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this->updateSections();
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return 1;
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}
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int elfparser::closeFile()
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{
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if(this->elfFile!=(int)NULL)
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{
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if(this->e!=NULL)
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{
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elf_end(this->e);
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this->e = NULL;
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}
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close(this->elfFile);
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this->elfFile = (int)NULL;
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}
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return 0;
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}
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QString elfparser::getClass()
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{
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if(this->e!=NULL)
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{
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int eclass = gelf_getclass(this->e);
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if(eclass==ELFCLASS32)return "ELF32";
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if(eclass==ELFCLASS64)return "ELF64";
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}
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return "none";
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}
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bool elfparser::isopened()
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{
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return this->opened;
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}
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bool elfparser::iself()
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{
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return this->type_elf;
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}
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QString elfparser::getArchitecture()
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{
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if(this->e!=NULL)
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{
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return elfresolveMachine(this->ehdr.e_machine);
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}
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return "";
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}
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QString elfparser::getType()
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{
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QString kind("");
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if(this->e!=NULL)
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{
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switch(this->ek)
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{
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case ELF_K_AR:
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kind = "Archive";
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break;
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case ELF_K_ELF:
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kind = "Elf";
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break;
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case ELF_K_COFF:
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kind = "COFF";
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break;
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case ELF_K_NUM:
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kind = "NUM";
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break;
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case ELF_K_NONE:
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kind = "Data";
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break;
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default:
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kind = "Unknow";
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break;
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}
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}
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return kind;
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}
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QString elfparser::getEndianness()
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{
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if(this->e!=NULL)
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{
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if(this->ehdr.e_ident[EI_DATA]==ELFDATA2LSB)return "2's complement, little endian";
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if(this->ehdr.e_ident[EI_DATA]==ELFDATA2MSB)return "2's complement, big endian";
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}
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return "none";
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}
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QString elfparser::getABI()
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{
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if(this->e!=NULL)
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{
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_NONE)return "UNIX System V ABI";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_SYSV)return "Alias";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_HPUX)return "HP-UX";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_NETBSD)return "NetBSD";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_LINUX)return "Object uses GNU ELF extensions";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_SOLARIS)return "Sun Solaris";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_AIX)return "IBM AIX";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_IRIX)return "SGI Irix";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_FREEBSD)return "FreeBSD";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_TRU64)return "Compaq TRU64 UNIX";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_MODESTO)return " Novell Modesto";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_OPENBSD)return "OpenBSD";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_ARM_AEABI)return "ARM EABI";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_ARM)return "ARM";
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if(this->ehdr.e_ident[EI_OSABI]==ELFOSABI_STANDALONE)return "Standalone (embedded) application";
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}
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return "none";
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}
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qint64 elfparser::getVersion()
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{
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if(this->e!=NULL)
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{
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return this->ehdr.e_version;
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}
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return -1;
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}
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qint64 elfparser::getEntryPointAddress()
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{
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if(this->e!=NULL)
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{
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return this->ehdr.e_entry;
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}
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return -1;
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}
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int elfparser::getSectioncount()
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{
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return (int)this->SectionCount;
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}
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int elfparser::getSegmentcount()
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{
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return (int)this->SegmentCount;
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}
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QString elfparser::getSegmentType(int index)
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{
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QString type("");
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if(this->e!=NULL)
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{
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if(index < this->Segments.count())
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{
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switch(this->Segments.at(index)->p_type)
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{
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case PT_NULL:
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type = "Program header table entry unused";
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break;
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case PT_LOAD:
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type = "Loadable program segment";
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break;
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case PT_DYNAMIC :
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type = "Dynamic linking information";
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break;
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case PT_INTERP:
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type ="Program interpreter";
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break;
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case PT_NOTE:
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type = "Auxiliary information";
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break;
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case PT_SHLIB:
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type = "Reserved";
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break;
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case PT_PHDR:
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type = "Entry for header table itself";
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break;
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case PT_TLS:
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type = "Thread-local storage segment";
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break;
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case PT_NUM:
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type = "Number of defined types";
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break;
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case PT_LOOS:
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type = "Start of OS-specific";
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break;
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case PT_SUNWSTACK:
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type = "Stack segment";
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break;
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case PT_LOPROC:
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type = "Start of processor-specific";
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break;
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case PT_HIPROC:
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type = "End of processor-specific";
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break;
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default:
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type = "Unknow Section Type";
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break;
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}
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}
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}
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return type;
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}
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qint64 elfparser::getSegmentOffset(int index)
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{
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qint64 Offset=-1;
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if(this->e!=NULL)
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{
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if(index < this->Segments.count())
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{
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Offset = (qint64)this->Segments.at(index)->p_offset;
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}
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}
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return Offset;
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}
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qint64 elfparser::getSegmentVaddr(int index)
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{
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int64_t Vaddr = 0;
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if(this->e!=NULL)
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{
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if(index < this->Segments.count())
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{
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Vaddr = (int64_t)this->Segments.at(index)->p_vaddr;
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}
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}
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return Vaddr;
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}
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qint64 elfparser::getSegmentPaddr(int index)
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{
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int64_t Paddr=0;
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if(this->e!=NULL)
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{
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if(index < this->Segments.count())
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{
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Paddr = (int64_t)this->Segments.at(index)->p_paddr;
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}
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}
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return Paddr;
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}
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qint64 elfparser::getSectionPaddr(int index)
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{
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int64_t Paddr=0;
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if(this->e!=NULL)
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{
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if(index < this->sections.count())
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{
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Paddr = (int64_t)this->sections.at(index)->section_header->sh_addr;
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}
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}
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return Paddr;
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}
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qint64 elfparser::getSegmentFilesz(int index)
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{
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int64_t FileSz=0;
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if(this->e!=NULL)
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{
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if(index < this->Segments.count())
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{
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FileSz = (int64_t)this->Segments.at(index)->p_filesz;
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}
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}
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return FileSz;
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}
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qint64 elfparser::getSectionDatasz(int index)
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{
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int64_t DataSz=0;
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if(this->e!=NULL)
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{
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if(index < this->sections.count())
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{
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DataSz = (int64_t)this->sections.at(index)->data->d_size;
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}
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}
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return DataSz;
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}
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bool elfparser::getSectionData(int index, char **buffer)
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{
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if(this->e!=NULL)
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{
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if(index < this->sections.count())
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{
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*buffer = (char *)this->sections.at(index)->data->d_buf;
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return true;
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}
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}
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return false;
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}
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qint64 elfparser::getSegmentMemsz(int index)
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{
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int64_t MemSz=0;
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if(this->e!=NULL)
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{
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if(index < this->Segments.count())
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{
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MemSz = (int64_t)this->Segments.at(index)->p_memsz;
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}
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}
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return MemSz;
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}
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qint64 elfparser::getSectionMemsz(int index)
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{
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int64_t MemSz=0;
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if(this->e!=NULL)
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{
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if(index < this->sections.count())
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{
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MemSz = (int64_t)this->sections.at(index)->section_header->sh_size;
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}
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}
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return MemSz;
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}
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QString elfparser::getSegmentFlags(int index)
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{
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QString flags("");
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if(this->e!=NULL)
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{
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if(index < this->Segments.count())
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{
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if((this->Segments.at(index)->p_flags&PF_X) == PF_X)flags+="x";
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if((this->Segments.at(index)->p_flags&PF_W) == PF_W)flags+="w";
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if((this->Segments.at(index)->p_flags&PF_R) == PF_R)flags+="r";
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if((this->Segments.at(index)->p_flags&PF_MASKOS) == PF_MASKOS)flags+=" OS-specific";
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if((this->Segments.at(index)->p_flags&PF_MASKPROC) == PF_MASKPROC)flags+=" Processor-specific";
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}
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}
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return flags;
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}
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QString elfparser::getSectionName(int index)
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{
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char* nameChr = elf_strptr(this->e , this->shstrndx , this->sections.at(index)->section_header->sh_name);
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return QString(nameChr);
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}
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void elfparser::updateSections()
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{
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for(int i=0;i<this->sections.count();i++)
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{
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delete this->sections.at(i);
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}
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this->sections.clear();
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this->scn = elf_nextscn (this->e , NULL );
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this->SectionCount = 0;
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while( this->scn != NULL )
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|
{
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GElf_Shdr* shdr = (GElf_Shdr*)malloc(sizeof(GElf_Shdr));
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gelf_getshdr ( this->scn , shdr );
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Elf_Data* data = elf_getdata(this->scn, NULL);
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this->sections.append(new Elf_Section(data,shdr));
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this->SectionCount+=1;
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this->scn = elf_nextscn(e , scn);
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}
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}
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void elfparser::updateSegments()
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{
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elf_getphdrnum (this->e , &this->SegmentCount);
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for(int i=0;i<this->Segments.count();i++)
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|
{
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|
free(this->Segments.at(i));
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|
}
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|
this->Segments.clear();
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|
for(int i=0;i<(int)this->SegmentCount;i++)
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|
{
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|
|
GElf_Phdr* header=(GElf_Phdr*)malloc(sizeof(GElf_Phdr));
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gelf_getphdr (this->e , i , header );
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this->Segments.append(header);
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}
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}
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|
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QString elfparser::getSectionType(int index)
|
|
|
{
|
|
|
QString type("");
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|
|
if(this->e!=NULL)
|
|
|
{
|
|
|
if(index < this->Segments.count())
|
|
|
{
|
|
|
switch(this->Segments.at(index)->p_type)
|
|
|
{
|
|
|
case SHT_NULL : type = "Section header table entry unused"; break;
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|
|
case SHT_PROGBITS : type = "Program data"; break;
|
|
|
case SHT_SYMTAB : type = "Symbol table"; break;
|
|
|
case SHT_STRTAB : type = "String table"; break;
|
|
|
case SHT_RELA : type = "Relocation entries with addends"; break;
|
|
|
case SHT_HASH : type = "Symbol hash table"; break;
|
|
|
case SHT_DYNAMIC : type = "Dynamic linking information"; break;
|
|
|
case SHT_NOTE : type = "Notes"; break;
|
|
|
case SHT_NOBITS :type = "Program space with no data (bss)"; break;
|
|
|
case SHT_REL :type = "Relocation entries, no addends"; break;
|
|
|
case SHT_SHLIB : type = "Reserved"; break;
|
|
|
case SHT_DYNSYM : type = "Dynamic linker symbol table"; break;
|
|
|
case SHT_INIT_ARRAY : type = "Array of constructors"; break;
|
|
|
case SHT_FINI_ARRAY : type = "Array of destructors"; break;
|
|
|
case SHT_PREINIT_ARRAY : type = "Array of pre-constructors"; break;
|
|
|
case SHT_GROUP : type = "Section group"; break;
|
|
|
case SHT_SYMTAB_SHNDX : type = "Extended section indeces"; break;
|
|
|
case SHT_NUM : type = "Number of defined types. "; break;
|
|
|
case SHT_LOOS : type = "Start OS-specific. "; break;
|
|
|
case SHT_LOSUNW : type = "Sun-specific low bound. "; break;
|
|
|
case SHT_SUNW_COMDAT : type = " "; break;
|
|
|
case SHT_SUNW_syminfo : type = " "; break;
|
|
|
case SHT_GNU_verdef : type = "Version definition section. "; break;
|
|
|
case SHT_GNU_verneed : type = "Version needs section. "; break;
|
|
|
case SHT_GNU_versym : type = "Version symbol table. "; break;
|
|
|
case SHT_LOPROC : type = "Start of processor-specific"; break;
|
|
|
case SHT_HIPROC : type = "End of processor-specific"; break;
|
|
|
case SHT_HIUSER : type = "End of application-specific"; break;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
return type;
|
|
|
}
|
|
|
|
|
|
bool elfparser::isElf(const QString &File)
|
|
|
{
|
|
|
int file =0;
|
|
|
#ifdef _ELF_WINDOWS_
|
|
|
file = open(File.toStdString().c_str(),O_RDONLY|O_BINARY ,0);
|
|
|
#else
|
|
|
file = open(File.toStdString().c_str(),O_RDONLY ,0);
|
|
|
#endif
|
|
|
char Magic[4];
|
|
|
if(file!=-1)
|
|
|
{
|
|
|
size_t res = read(file,Magic,4);
|
|
|
close(file);
|
|
|
if((res == 4) && (Magic[0]==0x7f) && (Magic[1]==0x45) && (Magic[2]==0x4c) && (Magic[3]==0x46))
|
|
|
{
|
|
|
return true;
|
|
|
}
|
|
|
}
|
|
|
return false;
|
|
|
}
|
|
|
|
|
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