ecoff_object.cc revision 2420 
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/loader/symtab.hh"
33
34#include "base/trace.hh"	// for DPRINTF
35
36#include "base/loader/exec_ecoff.h"
37#include "base/loader/coff_sym.h"
38#include "base/loader/coff_symconst.h"
39
40using namespace std;
41
42ObjectFile *
43EcoffObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
44{
45    if (((ecoff_filehdr *)data)->f_magic == ECOFF_MAGIC_ALPHA) {
46        // it's Alpha ECOFF
47        return new EcoffObject(fname, fd, len, data,
48                               ObjectFile::Alpha, ObjectFile::Tru64);
49    }
50    else {
51        return NULL;
52    }
53}
54
55
56EcoffObject::EcoffObject(const string &_filename, int _fd,
57                         size_t _len, uint8_t *_data,
58                         Arch _arch, OpSys _opSys)
59    : ObjectFile(_filename, _fd, _len, _data, _arch, _opSys)
60{
61    execHdr = (ecoff_exechdr *)fileData;
62    fileHdr = &(execHdr->f);
63    aoutHdr = &(execHdr->a);
64
65    entry = aoutHdr->entry;
66
67    text.baseAddr = aoutHdr->text_start;
68    text.size = aoutHdr->tsize;
69    text.fileImage = fileData + ECOFF_TXTOFF(execHdr);
70
71    data.baseAddr = aoutHdr->data_start;
72    data.size = aoutHdr->dsize;
73    data.fileImage = fileData + ECOFF_DATOFF(execHdr);
74
75    bss.baseAddr = aoutHdr->bss_start;
76    bss.size = aoutHdr->bsize;
77    bss.fileImage = NULL;
78
79    DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n",
80             text.baseAddr, text.size, data.baseAddr, data.size,
81             bss.baseAddr, bss.size);
82}
83
84
85bool
86EcoffObject::loadGlobalSymbols(SymbolTable *symtab)
87{
88    if (!symtab)
89        return false;
90
91    if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) {
92        warn("loadGlobalSymbols: wrong magic on %s\n", filename);
93        return false;
94    }
95
96    ecoff_symhdr *syms = (ecoff_symhdr *)(fileData + fileHdr->f_symptr);
97    if (syms->magic != magicSym2) {
98        warn("loadGlobalSymbols: bad symbol header magic on %s\n", filename);
99        return false;
100    }
101
102    ecoff_extsym *ext_syms = (ecoff_extsym *)(fileData + syms->cbExtOffset);
103
104    char *ext_strings = (char *)(fileData + syms->cbSsExtOffset);
105    for (int i = 0; i < syms->iextMax; i++) {
106        ecoff_sym *entry = &(ext_syms[i].asym);
107        if (entry->iss != -1)
108            symtab->insert(entry->value, ext_strings + entry->iss);
109    }
110
111    return true;
112}
113
114bool
115EcoffObject::loadLocalSymbols(SymbolTable *symtab)
116{
117    if (!symtab)
118        return false;
119
120    if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) {
121        warn("loadGlobalSymbols: wrong magic on %s\n", filename);
122        return false;
123    }
124
125    ecoff_symhdr *syms = (ecoff_symhdr *)(fileData + fileHdr->f_symptr);
126    if (syms->magic != magicSym2) {
127        warn("loadGlobalSymbols: bad symbol header magic on %s\n", filename);
128        return false;
129    }
130
131    ecoff_sym *local_syms = (ecoff_sym *)(fileData + syms->cbSymOffset);
132    char *local_strings = (char *)(fileData + syms->cbSsOffset);
133    ecoff_fdr *fdesc = (ecoff_fdr *)(fileData + syms->cbFdOffset);
134
135    for (int i = 0; i < syms->ifdMax; i++) {
136        ecoff_sym *entry = (ecoff_sym *)(local_syms + fdesc[i].isymBase);
137        char *strings = (char *)(local_strings + fdesc[i].issBase);
138        for (int j = 0; j < fdesc[i].csym; j++) {
139            if (entry[j].st == stGlobal || entry[j].st == stProc)
140                if (entry[j].iss != -1)
141                    symtab->insert(entry[j].value, strings + entry[j].iss);
142        }
143    }
144
145    for (int i = 0; i < syms->isymMax; i++) {
146        ecoff_sym *entry = &(local_syms[i]);
147        if (entry->st == stProc)
148            symtab->insert(entry->value, local_strings + entry->iss);
149    }
150
151    return true;
152}
153