elf_object.hh revision 8706:b1838faf3bcc
1/* 2 * Copyright (c) 2003-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Steve Reinhardt 29 */ 30 31#ifndef __ELF_OBJECT_HH__ 32#define __ELF_OBJECT_HH__ 33 34#include <set> 35#include <vector> 36 37#include "base/loader/object_file.hh" 38 39class ElfObject : public ObjectFile 40{ 41 protected: 42 43 //The global definition of a "Section" is closest to elf's segments. 44 typedef ObjectFile::Section Segment; 45 46 //These values are provided to a linux process by the kernel, so we 47 //need to keep them around. 48 Addr _programHeaderTable; 49 uint16_t _programHeaderSize; 50 uint16_t _programHeaderCount; 51 std::set<std::string> sectionNames; 52 53 /// Helper functions for loadGlobalSymbols() and loadLocalSymbols(). 54 bool loadSomeSymbols(SymbolTable *symtab, int binding, Addr mask); 55 56 ElfObject(const std::string &_filename, int _fd, 57 size_t _len, uint8_t *_data, 58 Arch _arch, OpSys _opSys); 59 60 void getSections(); 61 bool sectionExists(std::string sec); 62 63 std::vector<Segment> extraSegments; 64 65 public: 66 virtual ~ElfObject() {} 67 68 bool loadSections(PortProxy *memProxy, 69 Addr addrMask = std::numeric_limits<Addr>::max()); 70 virtual bool loadGlobalSymbols(SymbolTable *symtab, Addr addrMask = 71 std::numeric_limits<Addr>::max()); 72 virtual bool loadLocalSymbols(SymbolTable *symtab, Addr addrMask = 73 std::numeric_limits<Addr>::max()); 74 75 virtual bool isDynamic() { return sectionExists(".interp"); } 76 virtual bool hasTLS() { return sectionExists(".tbss"); } 77 78 static ObjectFile *tryFile(const std::string &fname, int fd, 79 size_t len, uint8_t *data); 80 Addr programHeaderTable() {return _programHeaderTable;} 81 uint16_t programHeaderSize() {return _programHeaderSize;} 82 uint16_t programHeaderCount() {return _programHeaderCount;} 83}; 84 85#endif // __ELF_OBJECT_HH__ 86