aout_object.cc revision 12
1/* 2 * Copyright (c) 2003 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 29#include <string> 30 31#include "aout_object.hh" 32 33#include "functional_memory.hh" 34#include "symtab.hh" 35 36#include "trace.hh" // for DPRINTF 37 38#include "exec_aout.h" 39 40using namespace std; 41 42ObjectFile * 43AoutObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data) 44{ 45 if (!N_BADMAG(*(aout_exechdr *)data)) { 46 return new AoutObject(fname, fd, len, data); 47 } 48 else { 49 return NULL; 50 } 51} 52 53 54AoutObject::AoutObject(const string &_filename, int _fd, 55 size_t _len, uint8_t *_data) 56 : ObjectFile(_filename, _fd, _len, _data) 57{ 58 execHdr = (aout_exechdr *)fileData; 59 60 entry = execHdr->entry; 61 62 text.baseAddr = N_TXTADDR(*execHdr); 63 text.size = execHdr->tsize; 64 65 data.baseAddr = N_DATADDR(*execHdr); 66 data.size = execHdr->dsize; 67 68 bss.baseAddr = N_BSSADDR(*execHdr); 69 bss.size = execHdr->bsize; 70 71 DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n", 72 text.baseAddr, text.size, data.baseAddr, data.size, 73 bss.baseAddr, bss.size); 74} 75 76 77bool 78AoutObject::loadSections(FunctionalMemory *mem, bool loadPhys) 79{ 80 Addr textAddr = text.baseAddr; 81 Addr dataAddr = data.baseAddr; 82 83 if (loadPhys) { 84 textAddr &= (ULL(1) << 40) - 1; 85 dataAddr &= (ULL(1) << 40) - 1; 86 } 87 88 // Since we don't really have an MMU and all memory is 89 // zero-filled, there's no need to set up the BSS segment. 90 if (text.size != 0) 91 mem->prot_write(textAddr, fileData + N_TXTOFF(*execHdr), text.size); 92 if (data.size != 0) 93 mem->prot_write(dataAddr, fileData + N_DATOFF(*execHdr), data.size); 94 95 return true; 96} 97 98 99bool 100AoutObject::loadGlobalSymbols(SymbolTable *symtab) 101{ 102 // a.out symbols not supported yet 103 return false; 104} 105 106bool 107AoutObject::loadLocalSymbols(SymbolTable *symtab) 108{ 109 // a.out symbols not supported yet 110 return false; 111} 112