mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-23 15:32:26 +00:00
401 lines
9.7 KiB
C++
401 lines
9.7 KiB
C++
/*
|
|
Copyright 2017 Wolfgang Thaller.
|
|
|
|
This file is part of Retro68.
|
|
|
|
Retro68 is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Retro68 is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with Retro68. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "Object.h"
|
|
#include "Symbol.h"
|
|
#include "Symtab.h"
|
|
#include "Section.h"
|
|
#include "SegmentMap.h"
|
|
#include "Reloc.h"
|
|
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <fstream>
|
|
#include <sstream>
|
|
#include <iostream>
|
|
|
|
#include <boost/algorithm/string/predicate.hpp>
|
|
#include <boost/lexical_cast.hpp>
|
|
|
|
#include "ResourceFork.h"
|
|
#include "BinaryIO.h"
|
|
#include "ResourceFile.h"
|
|
|
|
using std::string;
|
|
using std::shared_ptr;
|
|
using std::make_shared;
|
|
using std::ofstream;
|
|
using std::unordered_map;
|
|
using std::vector;
|
|
|
|
Object::~Object()
|
|
{
|
|
}
|
|
|
|
Object::Object(string input)
|
|
{
|
|
if(elf_version ( EV_CURRENT ) == EV_NONE)
|
|
errx(EXIT_FAILURE , "ELF library initialization failed: %s", elf_errmsg( -1));
|
|
|
|
int fd = open(input.c_str(), O_RDONLY, 0);
|
|
elf = elf_begin(fd, ELF_C_READ, NULL);
|
|
|
|
elf_getshdrstrndx(elf, §ionHeaderStringTableIdx);
|
|
|
|
GElf_Ehdr ehdr;
|
|
gelf_getehdr(elf, &ehdr);
|
|
|
|
int idx;
|
|
|
|
idx = 1;
|
|
for(Elf_Scn *scn = NULL; (scn = elf_nextscn(elf, scn)) != NULL; idx++)
|
|
{
|
|
GElf_Shdr shdr;
|
|
gelf_getshdr(scn, &shdr);
|
|
std::string name = elf_strptr(elf, sectionHeaderStringTableIdx, shdr.sh_name);
|
|
if(shdr.sh_type == SHT_STRTAB)
|
|
{
|
|
if(name == ".strtab")
|
|
mainStringTableIdx = idx;
|
|
}
|
|
}
|
|
|
|
idx = 1;
|
|
for(Elf_Scn *scn = NULL; (scn = elf_nextscn(elf, scn)) != NULL; idx++)
|
|
{
|
|
GElf_Shdr shdr;
|
|
gelf_getshdr(scn, &shdr);
|
|
std::string name = elf_strptr(elf, sectionHeaderStringTableIdx, shdr.sh_name);
|
|
//std::cout << "section #" << idx << ": " << name << std::endl;
|
|
//std::cout << " =" << shdr.sh_addr << " + " << shdr.sh_size << std::endl;
|
|
|
|
if(shdr.sh_type == SHT_SYMTAB
|
|
&& !symtab)
|
|
{
|
|
symtab.reset(new Symtab(*this, scn));
|
|
}
|
|
if(shdr.sh_type == SHT_RELA)
|
|
{
|
|
if(boost::algorithm::starts_with(name,".rela."))
|
|
{
|
|
string progbitsName = name.substr(5);
|
|
assert(sections.find(progbitsName) != sections.end());
|
|
sections[progbitsName]->SetRela(scn);
|
|
}
|
|
}
|
|
if(shdr.sh_type == SHT_PROGBITS && (shdr.sh_flags & SHF_ALLOC))
|
|
{
|
|
SectionKind kind = SectionKind::code;
|
|
|
|
if(name == ".data")
|
|
kind = SectionKind::data;
|
|
if(name == ".strippedmacsbugnames")
|
|
kind = SectionKind::undefined;
|
|
|
|
auto section = make_shared<Section>(*this, name, idx, kind, scn);
|
|
|
|
sections[name] = sectionsByElfIndex[idx] = section;
|
|
if(kind == SectionKind::data)
|
|
dataSection = section;
|
|
else if(kind == SectionKind::code)
|
|
codeSections.push_back(section);
|
|
}
|
|
if(shdr.sh_type == SHT_NOBITS)
|
|
{
|
|
bssSection = sections[name] = sectionsByElfIndex[idx] =
|
|
make_shared<Section>(*this, name, idx, SectionKind::bss, scn);
|
|
}
|
|
}
|
|
|
|
std::sort(codeSections.begin(), codeSections.end(),
|
|
[](shared_ptr<Section> a, shared_ptr<Section> b) { return a->name < b->name; });
|
|
}
|
|
|
|
void Object::FlatCode(std::ostream& out)
|
|
{
|
|
for(auto sec : codeSections)
|
|
{
|
|
sec->FixRelocs(true);
|
|
out << sec->GetData();
|
|
}
|
|
|
|
dataSection->FixRelocs(true);
|
|
out << dataSection->GetData();
|
|
|
|
std::vector<RuntimeReloc> relocs;
|
|
for(auto sec : codeSections)
|
|
{
|
|
auto tmp = sec->GetRelocations(false);
|
|
relocs.insert(relocs.end(), tmp.begin(), tmp.end());
|
|
}
|
|
{
|
|
auto tmp = dataSection->GetRelocations(false);
|
|
relocs.insert(relocs.end(), tmp.begin(), tmp.end());
|
|
}
|
|
out << SerializeRelocs(relocs);
|
|
}
|
|
|
|
void Object::FlatCode(string fn)
|
|
{
|
|
ofstream out(fn);
|
|
FlatCode(out);
|
|
}
|
|
|
|
|
|
std::string fromhex(std::string hex)
|
|
{
|
|
std::string bin;
|
|
int nibble;
|
|
bool haveNibble = false;
|
|
for(std::string::iterator p = hex.begin(); p != hex.end(); ++p)
|
|
{
|
|
if(std::isspace(*p))
|
|
continue;
|
|
assert(isdigit(*p) || (tolower(*p) >= 'a' && tolower(*p) <= 'f'));
|
|
int digit;
|
|
if(isdigit(*p))
|
|
digit = *p - '0';
|
|
else
|
|
digit = tolower(*p) - 'a' + 0xA;
|
|
|
|
if(haveNibble)
|
|
{
|
|
bin += (char) ((nibble << 4) | digit);
|
|
haveNibble = false;
|
|
}
|
|
else
|
|
{
|
|
nibble = digit;
|
|
haveNibble = true;
|
|
}
|
|
}
|
|
return bin;
|
|
}
|
|
|
|
|
|
|
|
void Object::SingleSegmentApp(string output)
|
|
{
|
|
ResourceFile file(output);
|
|
Resources& rsrc = file.resources;
|
|
|
|
rsrc.addResource(Resource(ResType("CODE"), 0,
|
|
fromhex(
|
|
"00000028 00000000 00000008 00000020"
|
|
"0000 3F3C 0001 A9F0"
|
|
)
|
|
));
|
|
|
|
|
|
{
|
|
std::ostringstream code1;
|
|
word(code1, 0);
|
|
word(code1, 1);
|
|
FlatCode(code1);
|
|
|
|
rsrc.addResource(Resource(ResType("CODE"), 1,
|
|
code1.str()));
|
|
}
|
|
|
|
file.creator = ResType("????");
|
|
file.type = ResType("APPL");
|
|
|
|
file.write();
|
|
}
|
|
|
|
|
|
|
|
void Object::MultiSegmentApp(string output, SegmentMap& segmentMap)
|
|
{
|
|
bool noisy = false;
|
|
|
|
ResourceFile file(output);
|
|
Resources& rsrc = file.resources;
|
|
|
|
for(auto namedSec : sections)
|
|
{
|
|
namedSec.second->ScanRelocs();
|
|
}
|
|
|
|
int jtEntryCount = 0;
|
|
unordered_map<int, vector<Symbol*>> jtEntries;
|
|
for(Symbol& sym : symtab->symbols)
|
|
{
|
|
if(sym.valid)
|
|
{
|
|
if(sym.referencedExternally && sym.sectionKind == SectionKind::code)
|
|
{
|
|
sym.needsJT = true;
|
|
sym.jtIndex = -1;
|
|
sym.section->jtEntries.push_back(&sym);
|
|
++jtEntryCount;
|
|
}
|
|
}
|
|
}
|
|
|
|
uint32_t data_and_bss_size = dataSection->shdr.sh_size + bssSection->shdr.sh_size;
|
|
|
|
{
|
|
std::ostringstream code0;
|
|
longword(code0, 0x20 + 8 * (jtEntryCount+2));
|
|
longword(code0, data_and_bss_size);
|
|
longword(code0, 8 * (jtEntryCount+2));
|
|
longword(code0, 0x20);
|
|
|
|
code0 << fromhex("0000 3F3C 0001 A9F0"); // jt entry for entrypoint
|
|
code0 << fromhex("0000 FFFF 0000 0000"); // 32-bit entries start from here
|
|
|
|
int jtIndex = 2;
|
|
int id = 1;
|
|
for(auto sec : codeSections)
|
|
{
|
|
sec->codeID = id;
|
|
|
|
sec->firstJTEntryIndex = jtIndex;
|
|
|
|
GElf_Shdr &shdr = sec->shdr;
|
|
|
|
for(Symbol* jtEntry : sec->jtEntries)
|
|
{
|
|
word(code0, id);
|
|
word(code0, 0xA9F0);
|
|
uint32_t offset = jtEntry->st_value - shdr.sh_addr;
|
|
if(id == 1)
|
|
offset += 4;
|
|
else
|
|
offset += 40;
|
|
longword(code0, offset);
|
|
|
|
jtEntry->jtIndex = jtIndex++;
|
|
|
|
//std::cout << "JT Entry " << jtEntry->jtIndex << ": " << jtEntry->name << std::endl;
|
|
}
|
|
|
|
id++;
|
|
}
|
|
|
|
if(noisy)
|
|
{
|
|
std::cout << "CODE 0: " << code0.str().size() << " bytes\n";
|
|
std::cout << "above A5: " << 0x20 + 8 * (jtEntryCount+2) << " bytes\n";
|
|
std::cout << "below A5: " << data_and_bss_size << " bytes\n";
|
|
std::cout << ".data: " << dataSection->shdr.sh_size << " bytes at A5-"
|
|
<< std::hex << data_and_bss_size << std::dec << "\n";
|
|
std::cout << ".bss: " << bssSection->shdr.sh_size << " bytes at A5-"
|
|
<< std::hex << bssSection->shdr.sh_size << std::dec << "\n";
|
|
}
|
|
rsrc.addResource(Resource(ResType("CODE"), 0, code0.str()));
|
|
}
|
|
|
|
for(auto sec : codeSections)
|
|
{
|
|
int id = sec->codeID;
|
|
if(id == 1)
|
|
sec->outputBase = 4; // standard 'CODE' header
|
|
else
|
|
sec->outputBase = 40; // far-model 'CODE' header
|
|
|
|
string exceptionInfoMarker = "__EH_FRAME_BEGIN__";
|
|
if(id != 1)
|
|
exceptionInfoMarker += boost::lexical_cast<string>(id);
|
|
int exceptionInfoSym = symtab->FindSym(exceptionInfoMarker);
|
|
if(exceptionInfoSym != -1)
|
|
{
|
|
Symbol& s = symtab->GetSym(exceptionInfoSym);
|
|
sec->exceptionInfoStart = s.st_value;
|
|
|
|
int codeSize = sec->shdr.sh_size;
|
|
int exceptionSize = sec->shdr.sh_addr + codeSize - sec->exceptionInfoStart;
|
|
double percent = 100.0 * exceptionSize / codeSize;
|
|
|
|
if(noisy)
|
|
std::cout << "CODE " << id << " has " << exceptionSize << " bytes of exception info (" << percent << "%)\n";
|
|
}
|
|
else if(noisy)
|
|
std::cout << "exception info marker not found: " << exceptionInfoMarker << std::endl;
|
|
}
|
|
dataSection->outputBase = -data_and_bss_size;
|
|
bssSection->outputBase = -bssSection->shdr.sh_size;
|
|
|
|
|
|
for(auto namedSec : sections)
|
|
{
|
|
namedSec.second->FixRelocs(false);
|
|
}
|
|
|
|
for(auto sec : codeSections)
|
|
{
|
|
int id = sec->codeID;
|
|
std::ostringstream code;
|
|
if(id == 1)
|
|
{
|
|
word(code, 0);
|
|
word(code, 1);
|
|
}
|
|
else
|
|
{
|
|
word(code, 0xFFFF);
|
|
word(code, 0);
|
|
longword(code, 0);
|
|
longword(code, 0);
|
|
longword(code, 8 * sec->firstJTEntryIndex );
|
|
longword(code, sec->jtEntries.size());
|
|
longword(code, 0); // reloc info for A5
|
|
longword(code, 0); // assumed address for A5
|
|
longword(code, 0); // reloc info for code
|
|
longword(code, 0); // assumed address for start of code resource
|
|
longword(code, 0);
|
|
}
|
|
code << sec->GetData();
|
|
|
|
if(noisy)
|
|
{
|
|
std::cout << "CODE " << id << ": " << code.str().size() << " bytes\n";
|
|
|
|
if(code.str().size() == 80)
|
|
{
|
|
std::cout << "... empty. Skipping.\n";
|
|
continue;
|
|
}
|
|
}
|
|
|
|
string segmentName = segmentMap.GetSegmentName(id);
|
|
|
|
rsrc.addResource(Resource(ResType("CODE"), id,
|
|
code.str(),
|
|
segmentName));
|
|
|
|
|
|
rsrc.addResource(Resource(ResType("RELA"),id, SerializeRelocs(sec->GetRelocations(true))));
|
|
}
|
|
|
|
rsrc.addResource(Resource(ResType("DATA"),0, dataSection->GetData()));
|
|
rsrc.addResource(Resource(ResType("RELA"),0, SerializeRelocs(dataSection->GetRelocations(true))));
|
|
|
|
if(noisy)
|
|
std::cout << "DATA 0: " << dataSection->shdr.sh_size << " bytes\n";
|
|
|
|
file.creator = ResType("????");
|
|
file.type = ResType("APPL");
|
|
|
|
file.write();
|
|
}
|