ecoff_object.cc revision 2632:1bb2f91485ea 
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