ecoff_object.cc revision 2665
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#include <string> 32 33#include "base/loader/ecoff_object.hh" 34#include "base/misc.hh" 35#include "base/loader/symtab.hh" 36 37#include "base/trace.hh" // for DPRINTF 38 39#include "base/loader/exec_ecoff.h" 40#include "base/loader/coff_sym.h" 41#include "base/loader/coff_symconst.h" 42 43using namespace std; 44 45ObjectFile * 46EcoffObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data) 47{ 48 if (((ecoff_filehdr *)data)->f_magic == ECOFF_MAGIC_ALPHA) { 49 // it's Alpha ECOFF 50 return new EcoffObject(fname, fd, len, data, 51 ObjectFile::Alpha, ObjectFile::Tru64); 52 } 53 else { 54 return NULL; 55 } 56} 57 58 59EcoffObject::EcoffObject(const string &_filename, int _fd, 60 size_t _len, uint8_t *_data, 61 Arch _arch, OpSys _opSys) 62 : ObjectFile(_filename, _fd, _len, _data, _arch, _opSys) 63{ 64 execHdr = (ecoff_exechdr *)fileData; 65 fileHdr = &(execHdr->f); 66 aoutHdr = &(execHdr->a); 67 68 entry = aoutHdr->entry; 69 70 text.baseAddr = aoutHdr->text_start; 71 text.size = aoutHdr->tsize; 72 text.fileImage = fileData + ECOFF_TXTOFF(execHdr); 73 74 data.baseAddr = aoutHdr->data_start; 75 data.size = aoutHdr->dsize; 76 data.fileImage = fileData + ECOFF_DATOFF(execHdr); 77 78 bss.baseAddr = aoutHdr->bss_start; 79 bss.size = aoutHdr->bsize; 80 bss.fileImage = NULL; 81 82 DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n", 83 text.baseAddr, text.size, data.baseAddr, data.size, 84 bss.baseAddr, bss.size); 85} 86 87 88bool 89EcoffObject::loadGlobalSymbols(SymbolTable *symtab) 90{ 91 if (!symtab) 92 return false; 93 94 if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) { 95 warn("loadGlobalSymbols: wrong magic on %s\n", filename); 96 return false; 97 } 98 99 ecoff_symhdr *syms = (ecoff_symhdr *)(fileData + fileHdr->f_symptr); 100 if (syms->magic != magicSym2) { 101 warn("loadGlobalSymbols: bad symbol header magic on %s\n", filename); 102 return false; 103 } 104 105 ecoff_extsym *ext_syms = (ecoff_extsym *)(fileData + syms->cbExtOffset); 106 107 char *ext_strings = (char *)(fileData + syms->cbSsExtOffset); 108 for (int i = 0; i < syms->iextMax; i++) { 109 ecoff_sym *entry = &(ext_syms[i].asym); 110 if (entry->iss != -1) 111 symtab->insert(entry->value, ext_strings + entry->iss); 112 } 113 114 return true; 115} 116 117bool 118EcoffObject::loadLocalSymbols(SymbolTable *symtab) 119{ 120 if (!symtab) 121 return false; 122 123 if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) { 124 warn("loadGlobalSymbols: wrong magic on %s\n", filename); 125 return false; 126 } 127 128 ecoff_symhdr *syms = (ecoff_symhdr *)(fileData + fileHdr->f_symptr); 129 if (syms->magic != magicSym2) { 130 warn("loadGlobalSymbols: bad symbol header magic on %s\n", filename); 131 return false; 132 } 133 134 ecoff_sym *local_syms = (ecoff_sym *)(fileData + syms->cbSymOffset); 135 char *local_strings = (char *)(fileData + syms->cbSsOffset); 136 ecoff_fdr *fdesc = (ecoff_fdr *)(fileData + syms->cbFdOffset); 137 138 for (int i = 0; i < syms->ifdMax; i++) { 139 ecoff_sym *entry = (ecoff_sym *)(local_syms + fdesc[i].isymBase); 140 char *strings = (char *)(local_strings + fdesc[i].issBase); 141 for (int j = 0; j < fdesc[i].csym; j++) { 142 if (entry[j].st == stGlobal || entry[j].st == stProc) 143 if (entry[j].iss != -1) 144 symtab->insert(entry[j].value, strings + entry[j].iss); 145 } 146 } 147 148 for (int i = 0; i < syms->isymMax; i++) { 149 ecoff_sym *entry = &(local_syms[i]); 150 if (entry->st == stProc) 151 symtab->insert(entry->value, local_strings + entry->iss); 152 } 153 154 return true; 155} 156