ecoff_object.cc revision 2439
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 29#include <string> 30 31#include "base/loader/ecoff_object.hh" 32#include "base/misc.hh" 33#include "base/loader/symtab.hh" 34 35#include "base/trace.hh" // for DPRINTF 36 37#include "base/loader/exec_ecoff.h" 38#include "base/loader/coff_sym.h" 39#include "base/loader/coff_symconst.h" 40 41using namespace std; 42 43ObjectFile * 44EcoffObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data) 45{ 46 if (((ecoff_filehdr *)data)->f_magic == ECOFF_MAGIC_ALPHA) { 47 // it's Alpha ECOFF 48 return new EcoffObject(fname, fd, len, data, 49 ObjectFile::Alpha, ObjectFile::Tru64); 50 } 51 else { 52 return NULL; 53 } 54} 55 56 57EcoffObject::EcoffObject(const string &_filename, int _fd, 58 size_t _len, uint8_t *_data, 59 Arch _arch, OpSys _opSys) 60 : ObjectFile(_filename, _fd, _len, _data, _arch, _opSys) 61{ 62 execHdr = (ecoff_exechdr *)fileData; 63 fileHdr = &(execHdr->f); 64 aoutHdr = &(execHdr->a); 65 66 entry = aoutHdr->entry; 67 68 text.baseAddr = aoutHdr->text_start; 69 text.size = aoutHdr->tsize; 70 text.fileImage = fileData + ECOFF_TXTOFF(execHdr); 71 72 data.baseAddr = aoutHdr->data_start; 73 data.size = aoutHdr->dsize; 74 data.fileImage = fileData + ECOFF_DATOFF(execHdr); 75 76 bss.baseAddr = aoutHdr->bss_start; 77 bss.size = aoutHdr->bsize; 78 bss.fileImage = NULL; 79 80 DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n", 81 text.baseAddr, text.size, data.baseAddr, data.size, 82 bss.baseAddr, bss.size); 83} 84 85 86bool 87EcoffObject::loadGlobalSymbols(SymbolTable *symtab) 88{ 89 if (!symtab) 90 return false; 91 92 if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) { 93 warn("loadGlobalSymbols: wrong magic on %s\n", filename); 94 return false; 95 } 96 97 ecoff_symhdr *syms = (ecoff_symhdr *)(fileData + fileHdr->f_symptr); 98 if (syms->magic != magicSym2) { 99 warn("loadGlobalSymbols: bad symbol header magic on %s\n", filename); 100 return false; 101 } 102 103 ecoff_extsym *ext_syms = (ecoff_extsym *)(fileData + syms->cbExtOffset); 104 105 char *ext_strings = (char *)(fileData + syms->cbSsExtOffset); 106 for (int i = 0; i < syms->iextMax; i++) { 107 ecoff_sym *entry = &(ext_syms[i].asym); 108 if (entry->iss != -1) 109 symtab->insert(entry->value, ext_strings + entry->iss); 110 } 111 112 return true; 113} 114 115bool 116EcoffObject::loadLocalSymbols(SymbolTable *symtab) 117{ 118 if (!symtab) 119 return false; 120 121 if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) { 122 warn("loadGlobalSymbols: wrong magic on %s\n", filename); 123 return false; 124 } 125 126 ecoff_symhdr *syms = (ecoff_symhdr *)(fileData + fileHdr->f_symptr); 127 if (syms->magic != magicSym2) { 128 warn("loadGlobalSymbols: bad symbol header magic on %s\n", filename); 129 return false; 130 } 131 132 ecoff_sym *local_syms = (ecoff_sym *)(fileData + syms->cbSymOffset); 133 char *local_strings = (char *)(fileData + syms->cbSsOffset); 134 ecoff_fdr *fdesc = (ecoff_fdr *)(fileData + syms->cbFdOffset); 135 136 for (int i = 0; i < syms->ifdMax; i++) { 137 ecoff_sym *entry = (ecoff_sym *)(local_syms + fdesc[i].isymBase); 138 char *strings = (char *)(local_strings + fdesc[i].issBase); 139 for (int j = 0; j < fdesc[i].csym; j++) { 140 if (entry[j].st == stGlobal || entry[j].st == stProc) 141 if (entry[j].iss != -1) 142 symtab->insert(entry[j].value, strings + entry[j].iss); 143 } 144 } 145 146 for (int i = 0; i < syms->isymMax; i++) { 147 ecoff_sym *entry = &(local_syms[i]); 148 if (entry->st == stProc) 149 symtab->insert(entry->value, local_strings + entry->iss); 150 } 151 152 return true; 153} 154