112SN/A/* 210037SARM gem5 Developers * Copyright (c) 2013 ARM Limited 310037SARM gem5 Developers * All rights reserved 410037SARM gem5 Developers * 510037SARM gem5 Developers * The license below extends only to copyright in the software and shall 610037SARM gem5 Developers * not be construed as granting a license to any other intellectual 710037SARM gem5 Developers * property including but not limited to intellectual property relating 810037SARM gem5 Developers * to a hardware implementation of the functionality of the software 910037SARM gem5 Developers * licensed hereunder. You may use the software subject to the license 1010037SARM gem5 Developers * terms below provided that you ensure that this notice is replicated 1110037SARM gem5 Developers * unmodified and in its entirety in all distributions of the software, 1210037SARM gem5 Developers * modified or unmodified, in source code or in binary form. 1310037SARM gem5 Developers * 141762SN/A * Copyright (c) 2003-2005 The Regents of The University of Michigan 1512SN/A * All rights reserved. 1612SN/A * 1712SN/A * Redistribution and use in source and binary forms, with or without 1812SN/A * modification, are permitted provided that the following conditions are 1912SN/A * met: redistributions of source code must retain the above copyright 2012SN/A * notice, this list of conditions and the following disclaimer; 2112SN/A * redistributions in binary form must reproduce the above copyright 2212SN/A * notice, this list of conditions and the following disclaimer in the 2312SN/A * documentation and/or other materials provided with the distribution; 2412SN/A * neither the name of the copyright holders nor the names of its 2512SN/A * contributors may be used to endorse or promote products derived from 2612SN/A * this software without specific prior written permission. 2712SN/A * 2812SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2912SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 3012SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 3112SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 3212SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 3312SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 3412SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 3512SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 3612SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 3712SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 3812SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 392665Ssaidi@eecs.umich.edu * 402665Ssaidi@eecs.umich.edu * Authors: Steve Reinhardt 4112SN/A */ 4212SN/A 4312SN/A#ifndef __ELF_OBJECT_HH__ 4412SN/A#define __ELF_OBJECT_HH__ 4512SN/A 465070Ssaidi@eecs.umich.edu#include <set> 475090Sgblack@eecs.umich.edu#include <vector> 4812SN/A 498229Snate@binkert.org#include "base/loader/object_file.hh" 508229Snate@binkert.org 5112SN/Aclass ElfObject : public ObjectFile 5212SN/A{ 5312SN/A protected: 5411906SBrandon.Potter@amd.com // The global definition of a gem5 "Section" is closest to ELF's segments. 555090Sgblack@eecs.umich.edu typedef ObjectFile::Section Segment; 565090Sgblack@eecs.umich.edu 5711906SBrandon.Potter@amd.com // These values are provided to a linux process by the kernel, so we 5811906SBrandon.Potter@amd.com // need to keep them around. 592976Sgblack@eecs.umich.edu Addr _programHeaderTable; 602976Sgblack@eecs.umich.edu uint16_t _programHeaderSize; 612976Sgblack@eecs.umich.edu uint16_t _programHeaderCount; 625070Ssaidi@eecs.umich.edu std::set<std::string> sectionNames; 632976Sgblack@eecs.umich.edu 6411389Sbrandon.potter@amd.com ElfObject *interpreter; 6511389Sbrandon.potter@amd.com 6611389Sbrandon.potter@amd.com // An interpreter load bias is the location in the process address space 6711389Sbrandon.potter@amd.com // where the interpreter is chosen to reside. Typically, this is carved 6811389Sbrandon.potter@amd.com // out of the top of the mmap reserve section. 6911389Sbrandon.potter@amd.com Addr ldBias; 7011389Sbrandon.potter@amd.com 7111389Sbrandon.potter@amd.com // The interpreter is typically a relocatable shared library and will 7211389Sbrandon.potter@amd.com // have a default value of zero which means that it does not care where 7311389Sbrandon.potter@amd.com // it is placed. However, the loader can be compiled and linked so that 7411389Sbrandon.potter@amd.com // it does care and needs a specific entry point. 7511389Sbrandon.potter@amd.com bool relocate; 7611389Sbrandon.potter@amd.com 7711389Sbrandon.potter@amd.com // The ldMin and ldMax fields are required to know how large of an 7811389Sbrandon.potter@amd.com // area is required to map the interpreter. 7911389Sbrandon.potter@amd.com Addr ldMin; 8011389Sbrandon.potter@amd.com Addr ldMax; 8111389Sbrandon.potter@amd.com 82468SN/A /// Helper functions for loadGlobalSymbols() and loadLocalSymbols(). 8311392Sbrandon.potter@amd.com bool loadSomeSymbols(SymbolTable *symtab, int binding, Addr mask, 8411392Sbrandon.potter@amd.com Addr base, Addr offset); 85468SN/A 8610880SCurtis.Dunham@arm.com ElfObject(const std::string &_filename, size_t _len, uint8_t *_data, 87360SN/A Arch _arch, OpSys _opSys); 8812SN/A 895070Ssaidi@eecs.umich.edu void getSections(); 905070Ssaidi@eecs.umich.edu bool sectionExists(std::string sec); 915070Ssaidi@eecs.umich.edu 925090Sgblack@eecs.umich.edu std::vector<Segment> extraSegments; 935090Sgblack@eecs.umich.edu 9412SN/A public: 9512SN/A virtual ~ElfObject() {} 9612SN/A 9714017Sbrandon.potter@amd.com bool loadSections(const PortProxy& mem_proxy, Addr addr_mask = maxAddr, 9811392Sbrandon.potter@amd.com Addr offset = 0) override; 9911392Sbrandon.potter@amd.com 10011392Sbrandon.potter@amd.com virtual bool loadAllSymbols(SymbolTable *symtab, Addr base = 0, 10111392Sbrandon.potter@amd.com Addr offset = 0, Addr addr_mask = maxAddr) 10211392Sbrandon.potter@amd.com override; 10311392Sbrandon.potter@amd.com 10411392Sbrandon.potter@amd.com virtual bool loadGlobalSymbols(SymbolTable *symtab, Addr base = 0, 10511392Sbrandon.potter@amd.com Addr offset = 0, Addr addr_mask = maxAddr) 10611392Sbrandon.potter@amd.com override; 10711392Sbrandon.potter@amd.com 10811392Sbrandon.potter@amd.com virtual bool loadLocalSymbols(SymbolTable *symtab, Addr base = 0, 10911392Sbrandon.potter@amd.com Addr offset = 0, Addr addr_mask = maxAddr) 11011392Sbrandon.potter@amd.com override; 11111392Sbrandon.potter@amd.com 11211392Sbrandon.potter@amd.com virtual bool loadWeakSymbols(SymbolTable *symtab, Addr base = 0, 11311392Sbrandon.potter@amd.com Addr offset = 0, Addr addr_mask = maxAddr) 11411392Sbrandon.potter@amd.com override; 11511392Sbrandon.potter@amd.com 11612SN/A 11711389Sbrandon.potter@amd.com virtual ObjectFile *getInterpreter() const override 11811389Sbrandon.potter@amd.com { return interpreter; } 11911389Sbrandon.potter@amd.com virtual Addr bias() const override { return ldBias; } 12011389Sbrandon.potter@amd.com virtual bool relocatable() const override { return relocate; } 12111389Sbrandon.potter@amd.com virtual Addr mapSize() const override { return ldMax - ldMin; } 12211389Sbrandon.potter@amd.com virtual void updateBias(Addr bias_addr) override; 12311389Sbrandon.potter@amd.com 12411389Sbrandon.potter@amd.com virtual bool hasTLS() override { return sectionExists(".tbss"); } 1253917Ssaidi@eecs.umich.edu 12610880SCurtis.Dunham@arm.com static ObjectFile *tryFile(const std::string &fname, 12711389Sbrandon.potter@amd.com size_t len, uint8_t *data, 12811389Sbrandon.potter@amd.com bool skip_interp_check = false); 1292976Sgblack@eecs.umich.edu Addr programHeaderTable() {return _programHeaderTable;} 1302976Sgblack@eecs.umich.edu uint16_t programHeaderSize() {return _programHeaderSize;} 1312976Sgblack@eecs.umich.edu uint16_t programHeaderCount() {return _programHeaderCount;} 13212SN/A}; 13312SN/A 13412SN/A#endif // __ELF_OBJECT_HH__ 135