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/*
* Copyright (c) 2003-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Steve Reinhardt
*/
#include "base/loader/ecoff_object.hh"
#include <string>
#include "base/loader/symtab.hh"
#include "base/logging.hh"
#include "base/trace.hh"
#include "base/types.hh"
#include "debug/Loader.hh"
// Only alpha will be able to load ecoff files for now.
// base/types.hh and ecoff_machdep.h must be before the other .h files
// because they are are gathered from other code bases and require some
// typedefs from those files.
#include "arch/alpha/ecoff_machdep.h"
#include "base/loader/coff_sym.h"
#include "base/loader/coff_symconst.h"
#include "base/loader/exec_ecoff.h"
using namespace std;
ObjectFile *
EcoffObjectFormat::load(ImageFileDataPtr ifd)
{
if (((const ecoff_filehdr *)ifd->data())->f_magic == ECOFF_MAGIC_ALPHA)
return new EcoffObject(ifd);
else
return nullptr;
}
namespace
{
EcoffObjectFormat ecoffObjectFormat;
} // anonymous namespace
EcoffObject::EcoffObject(ImageFileDataPtr ifd) : ObjectFile(ifd)
{
execHdr = (const ecoff_exechdr *)imageData->data();
fileHdr = &(execHdr->f);
aoutHdr = &(execHdr->a);
entry = aoutHdr->entry;
// it's Alpha ECOFF
arch = Alpha;
opSys = Tru64;
}
MemoryImage
EcoffObject::buildImage() const
{
MemoryImage image({
{ "text", aoutHdr->text_start, imageData,
ECOFF_TXTOFF(execHdr), aoutHdr->tsize },
{ "data", aoutHdr->data_start, imageData,
ECOFF_DATOFF(execHdr), aoutHdr->dsize },
{ "bss", aoutHdr->bss_start, aoutHdr->bsize }
});
for (auto M5_VAR_USED &seg: image.segments())
DPRINTFR(Loader, "%s\n", seg);
return image;
}
bool
EcoffObject::loadAllSymbols(SymbolTable *symtab, Addr base, Addr offset,
Addr addr_mask)
{
bool retval = loadGlobalSymbols(symtab, base, offset, addr_mask);
retval = retval && loadLocalSymbols(symtab, base, offset, addr_mask);
return retval;
}
bool
EcoffObject::loadGlobalSymbols(SymbolTable *symtab, Addr base, Addr offset,
Addr addr_mask)
{
if (!symtab)
return false;
if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) {
warn("loadGlobalSymbols: wrong magic on %s\n", imageData->filename());
return false;
}
auto *syms = (const ecoff_symhdr *)(imageData->data() + fileHdr->f_symptr);
if (syms->magic != magicSym2) {
warn("loadGlobalSymbols: bad symbol header magic on %s\n",
imageData->filename());
return false;
}
auto *ext_syms = (const ecoff_extsym *)(
imageData->data() + syms->cbExtOffset);
auto *ext_strings =
(const char *)(imageData->data() + syms->cbSsExtOffset);
for (int i = 0; i < syms->iextMax; i++) {
const ecoff_sym *entry = &(ext_syms[i].asym);
if (entry->iss != -1)
symtab->insert(entry->value, ext_strings + entry->iss);
}
return true;
}
bool
EcoffObject::loadLocalSymbols(SymbolTable *symtab, Addr base, Addr offset,
Addr addr_mask)
{
if (!symtab)
return false;
if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) {
warn("loadGlobalSymbols: wrong magic on %s\n", imageData->filename());
return false;
}
auto *syms = (const ecoff_symhdr *)(imageData->data() + fileHdr->f_symptr);
if (syms->magic != magicSym2) {
warn("loadGlobalSymbols: bad symbol header magic on %s\n",
imageData->filename());
return false;
}
auto *local_syms =
(const ecoff_sym *)(imageData->data() + syms->cbSymOffset);
auto *local_strings = (const char *)(imageData->data() + syms->cbSsOffset);
auto *fdesc = (const ecoff_fdr *)(imageData->data() + syms->cbFdOffset);
for (int i = 0; i < syms->ifdMax; i++) {
auto *entry = (const ecoff_sym *)(local_syms + fdesc[i].isymBase);
auto *strings = (const char *)(local_strings + fdesc[i].issBase);
for (int j = 0; j < fdesc[i].csym; j++) {
if (entry[j].st == stGlobal || entry[j].st == stProc)
if (entry[j].iss != -1)
symtab->insert(entry[j].value, strings + entry[j].iss);
}
}
for (int i = 0; i < syms->isymMax; i++) {
const ecoff_sym *entry = &(local_syms[i]);
if (entry->st == stProc)
symtab->insert(entry->value, local_strings + entry->iss);
}
return true;
}
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