aout_object.cc revision 12
112855Sgabeblack@google.com/* 212855Sgabeblack@google.com * Copyright (c) 2003 The Regents of The University of Michigan 312855Sgabeblack@google.com * All rights reserved. 412855Sgabeblack@google.com * 512855Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 612855Sgabeblack@google.com * modification, are permitted provided that the following conditions are 712855Sgabeblack@google.com * met: redistributions of source code must retain the above copyright 812855Sgabeblack@google.com * notice, this list of conditions and the following disclaimer; 912855Sgabeblack@google.com * redistributions in binary form must reproduce the above copyright 1012855Sgabeblack@google.com * notice, this list of conditions and the following disclaimer in the 1112855Sgabeblack@google.com * documentation and/or other materials provided with the distribution; 1212855Sgabeblack@google.com * neither the name of the copyright holders nor the names of its 1312855Sgabeblack@google.com * contributors may be used to endorse or promote products derived from 1412855Sgabeblack@google.com * this software without specific prior written permission. 1512855Sgabeblack@google.com * 1612855Sgabeblack@google.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1712855Sgabeblack@google.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1812855Sgabeblack@google.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1912855Sgabeblack@google.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2012855Sgabeblack@google.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2112855Sgabeblack@google.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2212855Sgabeblack@google.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2312855Sgabeblack@google.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2412855Sgabeblack@google.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2512855Sgabeblack@google.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2612855Sgabeblack@google.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2712855Sgabeblack@google.com */ 2812855Sgabeblack@google.com 2912855Sgabeblack@google.com#include <string> 3012855Sgabeblack@google.com 3112855Sgabeblack@google.com#include "aout_object.hh" 3212855Sgabeblack@google.com 3312855Sgabeblack@google.com#include "functional_memory.hh" 3412855Sgabeblack@google.com#include "symtab.hh" 3512855Sgabeblack@google.com 3612855Sgabeblack@google.com#include "trace.hh" // for DPRINTF 3712855Sgabeblack@google.com 3812855Sgabeblack@google.com#include "exec_aout.h" 3912855Sgabeblack@google.com 4012855Sgabeblack@google.comusing namespace std; 4112855Sgabeblack@google.com 4212855Sgabeblack@google.comObjectFile * 4312855Sgabeblack@google.comAoutObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data) 4412855Sgabeblack@google.com{ 4512855Sgabeblack@google.com if (!N_BADMAG(*(aout_exechdr *)data)) { 4612855Sgabeblack@google.com return new AoutObject(fname, fd, len, data); 4712855Sgabeblack@google.com } 4812855Sgabeblack@google.com else { 4912855Sgabeblack@google.com return NULL; 5012855Sgabeblack@google.com } 5112855Sgabeblack@google.com} 5212855Sgabeblack@google.com 5312855Sgabeblack@google.com 5412855Sgabeblack@google.comAoutObject::AoutObject(const string &_filename, int _fd, 5512855Sgabeblack@google.com size_t _len, uint8_t *_data) 5612855Sgabeblack@google.com : ObjectFile(_filename, _fd, _len, _data) 5712855Sgabeblack@google.com{ 5812855Sgabeblack@google.com execHdr = (aout_exechdr *)fileData; 5912855Sgabeblack@google.com 6012855Sgabeblack@google.com entry = execHdr->entry; 6112855Sgabeblack@google.com 6212855Sgabeblack@google.com text.baseAddr = N_TXTADDR(*execHdr); 6312855Sgabeblack@google.com text.size = execHdr->tsize; 6412855Sgabeblack@google.com 6512855Sgabeblack@google.com data.baseAddr = N_DATADDR(*execHdr); 6612855Sgabeblack@google.com data.size = execHdr->dsize; 6712855Sgabeblack@google.com 6812855Sgabeblack@google.com bss.baseAddr = N_BSSADDR(*execHdr); 6912855Sgabeblack@google.com bss.size = execHdr->bsize; 7012855Sgabeblack@google.com 7112855Sgabeblack@google.com DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n", 7212855Sgabeblack@google.com text.baseAddr, text.size, data.baseAddr, data.size, 7312855Sgabeblack@google.com bss.baseAddr, bss.size); 7412855Sgabeblack@google.com} 7512855Sgabeblack@google.com 7612855Sgabeblack@google.com 7712855Sgabeblack@google.combool 7812855Sgabeblack@google.comAoutObject::loadSections(FunctionalMemory *mem, bool loadPhys) 7912855Sgabeblack@google.com{ 8012855Sgabeblack@google.com Addr textAddr = text.baseAddr; 8112855Sgabeblack@google.com Addr dataAddr = data.baseAddr; 8212855Sgabeblack@google.com 8312855Sgabeblack@google.com if (loadPhys) { 8412855Sgabeblack@google.com textAddr &= (ULL(1) << 40) - 1; 8512855Sgabeblack@google.com dataAddr &= (ULL(1) << 40) - 1; 8612855Sgabeblack@google.com } 8712855Sgabeblack@google.com 8812855Sgabeblack@google.com // Since we don't really have an MMU and all memory is 8912855Sgabeblack@google.com // zero-filled, there's no need to set up the BSS segment. 9012855Sgabeblack@google.com if (text.size != 0) 9112855Sgabeblack@google.com mem->prot_write(textAddr, fileData + N_TXTOFF(*execHdr), text.size); 9212855Sgabeblack@google.com if (data.size != 0) 9312855Sgabeblack@google.com mem->prot_write(dataAddr, fileData + N_DATOFF(*execHdr), data.size); 9412855Sgabeblack@google.com 9512855Sgabeblack@google.com return true; 9612855Sgabeblack@google.com} 9712855Sgabeblack@google.com 9812855Sgabeblack@google.com 9912855Sgabeblack@google.combool 10012855Sgabeblack@google.comAoutObject::loadGlobalSymbols(SymbolTable *symtab) 10112855Sgabeblack@google.com{ 10212855Sgabeblack@google.com // a.out symbols not supported yet 10312855Sgabeblack@google.com return false; 10412855Sgabeblack@google.com} 105 106bool 107AoutObject::loadLocalSymbols(SymbolTable *symtab) 108{ 109 // a.out symbols not supported yet 110 return false; 111} 112