elf_object.hh revision 10037:5cac77888310
1/* 2 * Copyright (c) 2013 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2003-2005 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Steve Reinhardt 41 */ 42 43#ifndef __ELF_OBJECT_HH__ 44#define __ELF_OBJECT_HH__ 45 46#include <set> 47#include <vector> 48 49#include "base/loader/object_file.hh" 50 51class ElfObject : public ObjectFile 52{ 53 protected: 54 55 //The global definition of a "Section" is closest to elf's segments. 56 typedef ObjectFile::Section Segment; 57 58 //These values are provided to a linux process by the kernel, so we 59 //need to keep them around. 60 Addr _programHeaderTable; 61 uint16_t _programHeaderSize; 62 uint16_t _programHeaderCount; 63 std::set<std::string> sectionNames; 64 65 /// Helper functions for loadGlobalSymbols() and loadLocalSymbols(). 66 bool loadSomeSymbols(SymbolTable *symtab, int binding, Addr mask); 67 68 ElfObject(const std::string &_filename, int _fd, 69 size_t _len, uint8_t *_data, 70 Arch _arch, OpSys _opSys); 71 72 void getSections(); 73 bool sectionExists(std::string sec); 74 75 std::vector<Segment> extraSegments; 76 77 public: 78 virtual ~ElfObject() {} 79 80 bool loadSections(PortProxy& memProxy, 81 Addr addrMask = std::numeric_limits<Addr>::max(), 82 Addr offset = 0); 83 virtual bool loadGlobalSymbols(SymbolTable *symtab, Addr addrMask = 84 std::numeric_limits<Addr>::max()); 85 virtual bool loadLocalSymbols(SymbolTable *symtab, Addr addrMask = 86 std::numeric_limits<Addr>::max()); 87 virtual bool loadWeakSymbols(SymbolTable *symtab, Addr addrMask = 88 std::numeric_limits<Addr>::max()); 89 90 virtual bool isDynamic() { return sectionExists(".interp"); } 91 virtual bool hasTLS() { return sectionExists(".tbss"); } 92 93 static ObjectFile *tryFile(const std::string &fname, int fd, 94 size_t len, uint8_t *data); 95 Addr programHeaderTable() {return _programHeaderTable;} 96 uint16_t programHeaderSize() {return _programHeaderSize;} 97 uint16_t programHeaderCount() {return _programHeaderCount;} 98}; 99 100#endif // __ELF_OBJECT_HH__ 101