ecoff_object.cc revision 1252 
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 "base/loader/ecoff_object.hh"
32
33#include "mem/functional_mem/functional_memory.hh"
34#include "base/loader/symtab.hh"
35
36#include "base/trace.hh"	// for DPRINTF
37
38#include "base/loader/exec_ecoff.h"
39#include "base/loader/coff_sym.h"
40#include "base/loader/coff_symconst.h"
41
42using namespace std;
43
44ObjectFile *
45EcoffObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
46{
47    if (((ecoff_filehdr *)data)->f_magic == ECOFF_MAGIC_ALPHA) {
48        // it's Alpha ECOFF
49        return new EcoffObject(fname, fd, len, data,
50                               ObjectFile::Alpha, ObjectFile::Tru64);
51    }
52    else {
53        return NULL;
54    }
55}
56
57
58EcoffObject::EcoffObject(const string &_filename, int _fd,
59                         size_t _len, uint8_t *_data,
60                         Arch _arch, OpSys _opSys)
61    : ObjectFile(_filename, _fd, _len, _data, _arch, _opSys)
62{
63    execHdr = (ecoff_exechdr *)fileData;
64    fileHdr = &(execHdr->f);
65    aoutHdr = &(execHdr->a);
66
67    entry = aoutHdr->entry;
68
69    text.baseAddr = aoutHdr->text_start;
70    text.size = aoutHdr->tsize;
71
72    data.baseAddr = aoutHdr->data_start;
73    data.size = aoutHdr->dsize;
74
75    bss.baseAddr = aoutHdr->bss_start;
76    bss.size = aoutHdr->bsize;
77
78    DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n",
79             text.baseAddr, text.size, data.baseAddr, data.size,
80             bss.baseAddr, bss.size);
81}
82
83
84bool
85EcoffObject::loadSections(FunctionalMemory *mem, bool loadPhys)
86{
87    Addr textAddr = text.baseAddr;
88    Addr dataAddr = data.baseAddr;
89
90    if (loadPhys) {
91        textAddr &= (ULL(1) << 40) - 1;
92        dataAddr &= (ULL(1) << 40) - 1;
93    }
94
95    // Since we don't really have an MMU and all memory is
96    // zero-filled, there's no need to set up the BSS segment.
97    mem->prot_write(textAddr, fileData + ECOFF_TXTOFF(execHdr), text.size);
98    mem->prot_write(dataAddr, fileData + ECOFF_DATOFF(execHdr), data.size);
99
100    return true;
101}
102
103
104bool
105EcoffObject::loadGlobalSymbols(SymbolTable *symtab)
106{
107    if (!symtab)
108        return false;
109
110    if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) {
111        warn("loadGlobalSymbols: wrong magic on %s\n", filename);
112        return false;
113    }
114
115    ecoff_symhdr *syms = (ecoff_symhdr *)(fileData + fileHdr->f_symptr);
116    if (syms->magic != magicSym2) {
117        warn("loadGlobalSymbols: bad symbol header magic on %s\n", filename);
118        return false;
119    }
120
121    ecoff_extsym *ext_syms = (ecoff_extsym *)(fileData + syms->cbExtOffset);
122
123    char *ext_strings = (char *)(fileData + syms->cbSsExtOffset);
124    for (int i = 0; i < syms->iextMax; i++) {
125        ecoff_sym *entry = &(ext_syms[i].asym);
126        if (entry->iss != -1)
127            symtab->insert(entry->value, ext_strings + entry->iss);
128    }
129
130    return true;
131}
132
133bool
134EcoffObject::loadLocalSymbols(SymbolTable *symtab)
135{
136    if (!symtab)
137        return false;
138
139    if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) {
140        warn("loadGlobalSymbols: wrong magic on %s\n", filename);
141        return false;
142    }
143
144    ecoff_symhdr *syms = (ecoff_symhdr *)(fileData + fileHdr->f_symptr);
145    if (syms->magic != magicSym2) {
146        warn("loadGlobalSymbols: bad symbol header magic on %s\n", filename);
147        return false;
148    }
149
150    ecoff_sym *local_syms = (ecoff_sym *)(fileData + syms->cbSymOffset);
151    char *local_strings = (char *)(fileData + syms->cbSsOffset);
152    ecoff_fdr *fdesc = (ecoff_fdr *)(fileData + syms->cbFdOffset);
153
154    for (int i = 0; i < syms->ifdMax; i++) {
155        ecoff_sym *entry = (ecoff_sym *)(local_syms + fdesc[i].isymBase);
156        char *strings = (char *)(local_strings + fdesc[i].issBase);
157        for (int j = 0; j < fdesc[i].csym; j++) {
158            if (entry[j].st == stGlobal || entry[j].st == stProc)
159                if (entry[j].iss != -1)
160                    symtab->insert(entry[j].value, strings + entry[j].iss);
161        }
162    }
163
164    for (int i = 0; i < syms->isymMax; i++) {
165        ecoff_sym *entry = &(local_syms[i]);
166        if (entry->st == stProc)
167            symtab->insert(entry->value, local_strings + entry->iss);
168    }
169
170    return true;
171}
172