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generalize ARCodeTranslator

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This commit is contained in:
Martin Michelsen
2024-05-04 10:49:51 -07:00
parent e42cfb649f
commit 59db3c82f9
6 changed files with 536 additions and 661 deletions
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src/AddressTranslator.cc
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#include "AddressTranslator.hh"
#include <array>
#include <future>
#include <phosg/Filesystem.hh>
#include <phosg/Strings.hh>
#include <resource_file/ExecutableFormats/DOLFile.hh>
#include <resource_file/ExecutableFormats/XBEFile.hh>
using namespace std;
class AddressTranslator {
public:
enum class ExpandMethod {
PPC_TEXT_FORWARD = 0,
PPC_TEXT_FORWARD_WITH_BARRIER,
PPC_TEXT_BACKWARD,
PPC_TEXT_BACKWARD_WITH_BARRIER,
PPC_TEXT_BOTH,
PPC_TEXT_BOTH_WITH_BARRIER,
PPC_TEXT_BOTH_IGNORE_ORIGIN,
PPC_DATA_FORWARD,
PPC_DATA_BACKWARD,
PPC_DATA_BOTH,
RAW_FORWARD,
RAW_BACKWARD,
RAW_BOTH,
};
static const char* name_for_expand_method(ExpandMethod method) {
switch (method) {
case ExpandMethod::PPC_TEXT_FORWARD:
return "PPC_TEXT_FORWARD";
case ExpandMethod::PPC_TEXT_FORWARD_WITH_BARRIER:
return "PPC_TEXT_FORWARD_WITH_BARRIER";
case ExpandMethod::PPC_TEXT_BACKWARD:
return "PPC_TEXT_BACKWARD";
case ExpandMethod::PPC_TEXT_BACKWARD_WITH_BARRIER:
return "PPC_TEXT_BACKWARD_WITH_BARRIER";
case ExpandMethod::PPC_TEXT_BOTH:
return "PPC_TEXT_BOTH";
case ExpandMethod::PPC_TEXT_BOTH_WITH_BARRIER:
return "PPC_TEXT_BOTH_WITH_BARRIER";
case ExpandMethod::PPC_TEXT_BOTH_IGNORE_ORIGIN:
return "PPC_TEXT_BOTH_IGNORE_ORIGIN";
case ExpandMethod::PPC_DATA_FORWARD:
return "PPC_DATA_FORWARD";
case ExpandMethod::PPC_DATA_BACKWARD:
return "PPC_DATA_BACKWARD";
case ExpandMethod::PPC_DATA_BOTH:
return "PPC_DATA_BOTH";
case ExpandMethod::RAW_FORWARD:
return "RAW_FORWARD";
case ExpandMethod::RAW_BACKWARD:
return "RAW_BACKWARD";
case ExpandMethod::RAW_BOTH:
return "RAW_BOTH";
default:
throw logic_error("invalid expand method");
}
}
static bool is_ppc_expand_method(ExpandMethod method) {
switch (method) {
case ExpandMethod::PPC_TEXT_FORWARD:
case ExpandMethod::PPC_TEXT_FORWARD_WITH_BARRIER:
case ExpandMethod::PPC_TEXT_BACKWARD:
case ExpandMethod::PPC_TEXT_BACKWARD_WITH_BARRIER:
case ExpandMethod::PPC_TEXT_BOTH:
case ExpandMethod::PPC_TEXT_BOTH_WITH_BARRIER:
case ExpandMethod::PPC_TEXT_BOTH_IGNORE_ORIGIN:
case ExpandMethod::PPC_DATA_FORWARD:
case ExpandMethod::PPC_DATA_BACKWARD:
case ExpandMethod::PPC_DATA_BOTH:
return true;
case ExpandMethod::RAW_FORWARD:
case ExpandMethod::RAW_BACKWARD:
case ExpandMethod::RAW_BOTH:
return false;
default:
throw logic_error("invalid expand method");
}
}
static bool is_ppc_data_expand_method(ExpandMethod method) {
switch (method) {
case ExpandMethod::PPC_DATA_FORWARD:
case ExpandMethod::PPC_DATA_BACKWARD:
case ExpandMethod::PPC_DATA_BOTH:
return true;
case ExpandMethod::PPC_TEXT_FORWARD:
case ExpandMethod::PPC_TEXT_FORWARD_WITH_BARRIER:
case ExpandMethod::PPC_TEXT_BACKWARD:
case ExpandMethod::PPC_TEXT_BACKWARD_WITH_BARRIER:
case ExpandMethod::PPC_TEXT_BOTH:
case ExpandMethod::PPC_TEXT_BOTH_WITH_BARRIER:
case ExpandMethod::PPC_TEXT_BOTH_IGNORE_ORIGIN:
case ExpandMethod::RAW_FORWARD:
case ExpandMethod::RAW_BACKWARD:
case ExpandMethod::RAW_BOTH:
return false;
default:
throw logic_error("invalid expand method");
}
}
AddressTranslator(const string& directory)
: log("[addr-trans] "),
directory(directory),
enable_ppc(false) {
while (ends_with(this->directory, "/")) {
this->directory.pop_back();
}
for (const auto& filename : list_directory(this->directory)) {
if (ends_with(filename, ".dol")) {
string name = filename.substr(0, filename.size() - 4);
string path = directory + "/" + filename;
DOLFile dol(path.c_str());
auto mem = make_shared<MemoryContext>();
dol.load_into(mem);
this->mems.emplace(name, mem);
this->enable_ppc = true;
this->log.info("Loaded %s", name.c_str());
} else if (ends_with(filename, ".xbe")) {
string name = filename.substr(0, filename.size() - 4);
string path = directory + "/" + filename;
XBEFile xbe(path.c_str());
auto mem = make_shared<MemoryContext>();
xbe.load_into(mem);
this->mems.emplace(name, mem);
this->log.info("Loaded %s", name.c_str());
} else if (ends_with(filename, ".bin")) {
string name = filename.substr(0, filename.size() - 4);
string path = directory + "/" + filename;
string data = load_file(path);
auto mem = make_shared<MemoryContext>();
mem->allocate_at(0x8C010000, data.size());
mem->memcpy(0x8C010000, data.data(), data.size());
this->mems.emplace(name, mem);
this->log.info("Loaded %s", name.c_str());
}
}
}
~AddressTranslator() = default;
const string& get_source_filename() const {
return this->src_filename;
}
void set_source_file(const string& filename) {
this->src_filename = filename;
this->src_mem = this->mems.at(this->src_filename);
}
void find_ppc_rtoc_global_regs() const {
for (const auto& it : this->mems) {
bool r2_high_found = false;
bool r2_low_found = false;
bool r13_high_found = false;
bool r13_low_found = false;
uint32_t r2 = 0;
uint32_t r13 = 0;
for (const auto& block : it.second->allocated_blocks()) {
StringReader r = it.second->reader(block.first, block.second);
while (!r.eof() && r.where()) {
uint32_t opcode = r.get_u32b();
if ((opcode & 0xFFFF0000) == 0x3DA00000) {
if (r13_high_found) {
throw runtime_error("multiple values for r13_high");
}
r13_high_found = true;
r13 |= (opcode << 16);
} else if ((opcode & 0xFFFF0000) == 0x3C400000) {
if (r2_high_found) {
throw runtime_error("multiple values for r2_high");
}
r2_high_found = true;
r2 |= (opcode << 16);
} else if ((opcode & 0xFFFF0000) == 0x61AD0000) {
if (r13_low_found) {
throw runtime_error("multiple values for r13_low");
}
r13_low_found = true;
r13 |= (opcode & 0xFFFF);
} else if ((opcode & 0xFFFF0000) == 0x60420000) {
if (r2_low_found) {
throw runtime_error("multiple values for r2_low");
}
r2_low_found = true;
r2 |= (opcode & 0xFFFF);
}
}
}
if (r2_low_found && r2_high_found) {
fprintf(stderr, "(%s) r2 = %08" PRIX32 "\n", it.first.c_str(), r2);
} else {
fprintf(stderr, "(%s) r2 = __MISSING__\n", it.first.c_str());
}
if (r13_low_found && r13_high_found) {
fprintf(stderr, "(%s) r13 = %08" PRIX32 "\n", it.first.c_str(), r13);
} else {
fprintf(stderr, "(%s) r13 = __MISSING__\n", it.first.c_str());
}
}
}
uint32_t find_match(
shared_ptr<const MemoryContext> dest_mem,
uint32_t src_addr,
uint32_t src_size,
ExpandMethod expand_method) const {
bool is_ppc = this->is_ppc_expand_method(expand_method);
bool is_ppc_data = this->is_ppc_data_expand_method(expand_method);
if (!this->src_mem) {
throw runtime_error("no source file selected");
}
if (src_size == 0) {
src_size = is_ppc ? 4 : 1;
}
pair<uint32_t, uint32_t> src_section = make_pair(0, 0);
for (const auto& sec : this->src_mem->allocated_blocks()) {
if (src_addr >= sec.first && src_addr + src_size <= sec.first + sec.second) {
src_section = sec;
break;
}
}
if (!src_section.second) {
throw runtime_error("source address not within any section");
}
const char* method_token = this->name_for_expand_method(expand_method);
size_t src_offset = src_addr - src_section.first;
size_t src_bytes_available_before = src_offset;
size_t src_bytes_available_after = src_section.second - src_offset - 4;
this->log.info("(find_match/%s) Source offset = %08zX with %zX/%zX bytes available before/after",
method_token, src_offset, src_bytes_available_before, src_bytes_available_after);
size_t match_bytes_before = 0;
size_t match_bytes_after = 0;
while (match_bytes_before + match_bytes_after + 4 < 0x100) {
size_t num_matches = 0;
size_t last_match_address = 0;
size_t match_length = match_bytes_before + match_bytes_after + 4;
StringReader src_r = this->src_mem->reader(src_section.first + src_offset - match_bytes_before, match_length);
for (const auto& dest_section : dest_mem->allocated_blocks()) {
for (size_t dest_match_offset = 0;
dest_match_offset + match_length < dest_section.second;
dest_match_offset += (is_ppc ? 4 : 1)) {
src_r.go(0);
StringReader dest_r = dest_mem->reader(dest_section.first + dest_match_offset, match_length);
size_t z;
if (is_ppc) {
for (z = 0; z < match_length; z += 4) {
if ((expand_method == ExpandMethod::PPC_TEXT_BOTH_IGNORE_ORIGIN) && (z == match_bytes_before)) {
src_r.skip(4);
dest_r.skip(4);
} else if (!is_ppc_data) {
uint32_t src_opcode = src_r.get_u32b();
uint32_t dest_opcode = dest_r.get_u32b();
uint32_t src_class = src_opcode & 0xFC000000;
if (src_class != (dest_opcode & 0xFC000000)) {
break;
}
if (src_class == 0x48000000) {
// b +-offset
src_opcode &= 0xFC000003;
dest_opcode &= 0xFC000003;
} else if (((src_opcode & 0xAC1F0000) == 0x800D0000) || ((src_opcode & 0xAC1F0000) == 0x80020000)) {
// lwz/lfs rXX/fXX, [r2/r13 +- offset] OR stw/stfs [r2/r13 +- offset], rXX/fXX
src_opcode &= 0xFFFF0000;
dest_opcode &= 0xFFFF0000;
}
if (src_opcode != dest_opcode) {
break;
}
} else {
uint32_t src_data = src_r.get_u32b();
uint32_t dest_data = dest_r.get_u32b();
if ((src_data & 0xFE000000) == 0x80000000) {
src_data &= 0xFE000003;
}
if ((dest_data & 0xFE000000) == 0x80000000) {
dest_data &= 0xFE000003;
}
if (src_data != dest_data) {
break;
}
}
}
} else {
for (z = 0; z < match_length; z++) {
uint8_t src_data = src_r.get_u8();
uint8_t dest_data = dest_r.get_u8();
if (src_data != dest_data) {
break;
}
}
}
if (z == match_length) {
num_matches++;
last_match_address = dest_section.first + dest_match_offset + match_bytes_before;
}
}
}
this->log.info("(find_match/%s) For match length %zX, %zu matches found", method_token, match_length, num_matches);
if (num_matches == 1) {
return last_match_address;
} else if (num_matches == 0) {
throw runtime_error("did not find exactly one match");
}
bool can_expand_backward = false;
bool can_expand_forward = false;
switch (expand_method) {
case ExpandMethod::PPC_TEXT_BACKWARD_WITH_BARRIER:
can_expand_backward = (src_r.pget_u32b(0) != 0x4E800020) &&
(src_bytes_available_before >= match_bytes_before + 4);
break;
case ExpandMethod::PPC_TEXT_BACKWARD:
case ExpandMethod::PPC_DATA_BACKWARD:
can_expand_backward = (src_bytes_available_before >= match_bytes_before + 4);
break;
case ExpandMethod::PPC_TEXT_FORWARD_WITH_BARRIER:
can_expand_forward = (src_r.pget_u32b(src_r.size() - 4) != 0x4E800020) &&
(src_bytes_available_after >= match_bytes_after + 4);
break;
case ExpandMethod::PPC_TEXT_FORWARD:
case ExpandMethod::PPC_DATA_FORWARD:
can_expand_forward = (src_bytes_available_after >= match_bytes_after + 4);
break;
case ExpandMethod::PPC_TEXT_BOTH_WITH_BARRIER:
case ExpandMethod::PPC_TEXT_BOTH_IGNORE_ORIGIN:
can_expand_backward = (src_r.pget_u32b(0) != 0x4E800020) &&
(src_bytes_available_before >= match_bytes_before + 4);
can_expand_forward = (src_r.pget_u32b(src_r.size() - 4) != 0x4E800020) &&
(src_bytes_available_after >= match_bytes_after + 4);
break;
case ExpandMethod::PPC_TEXT_BOTH:
case ExpandMethod::PPC_DATA_BOTH:
can_expand_backward = (src_bytes_available_before >= match_bytes_before + 4);
can_expand_forward = (src_bytes_available_after >= match_bytes_after + 4);
break;
case ExpandMethod::RAW_BACKWARD:
can_expand_backward = (src_bytes_available_before > match_bytes_before);
break;
case ExpandMethod::RAW_FORWARD:
can_expand_forward = (src_bytes_available_after > match_bytes_after);
break;
case ExpandMethod::RAW_BOTH:
can_expand_backward = (src_bytes_available_before > match_bytes_before);
can_expand_forward = (src_bytes_available_after > match_bytes_after);
break;
default:
throw logic_error("invalid expand method");
}
if (!can_expand_backward && !can_expand_forward) {
throw runtime_error("no further expansion is allowed");
}
if (can_expand_backward) {
match_bytes_before += (is_ppc ? 4 : 1);
}
if (can_expand_forward) {
match_bytes_after += (is_ppc ? 4 : 1);
}
}
throw runtime_error("scan field too long; too many matches");
}
void find_all_matches(uint32_t src_addr, uint32_t src_size) const {
if (!this->src_mem) {
throw runtime_error("no source file selected");
}
map<string, uint32_t> results;
for (const auto& it : this->mems) {
if (it.second == this->src_mem) {
log.info("(%s) %08" PRIX32 " (from source)", it.first.c_str(), src_addr);
results.emplace(it.first, src_addr);
} else {
vector<future<uint32_t>> futures;
static const vector<ExpandMethod> ppc_methods = {
ExpandMethod::PPC_TEXT_FORWARD,
ExpandMethod::PPC_TEXT_FORWARD_WITH_BARRIER,
ExpandMethod::PPC_TEXT_BACKWARD,
ExpandMethod::PPC_TEXT_BACKWARD_WITH_BARRIER,
ExpandMethod::PPC_TEXT_BOTH,
ExpandMethod::PPC_TEXT_BOTH_WITH_BARRIER,
ExpandMethod::PPC_TEXT_BOTH_IGNORE_ORIGIN,
ExpandMethod::PPC_DATA_FORWARD,
ExpandMethod::PPC_DATA_BACKWARD,
ExpandMethod::PPC_DATA_BOTH,
};
static const vector<ExpandMethod> raw_methods = {
ExpandMethod::RAW_FORWARD,
ExpandMethod::RAW_BACKWARD,
ExpandMethod::RAW_BOTH,
};
const auto& methods = this->enable_ppc ? ppc_methods : raw_methods;
for (size_t z = 0; z < methods.size(); z++) {
futures.emplace_back(async(&AddressTranslator::find_match, this, it.second, src_addr, src_size, methods[z]));
}
unordered_set<uint32_t> match_addrs;
for (size_t z = 0; z < futures.size(); z++) {
const char* method_name = this->name_for_expand_method(methods[z]);
try {
uint32_t ret = futures[z].get();
log.info("(%s) (%s) %08" PRIX32, it.first.c_str(), method_name, ret);
match_addrs.emplace(ret);
} catch (const exception& e) {
log.error("(%s) (%s) failed: %s", it.first.c_str(), method_name, e.what());
}
}
if (match_addrs.empty()) {
log.error("(%s) no match found", it.first.c_str());
} else if (match_addrs.size() > 1) {
log.error("(%s) different matches found by different methods", it.first.c_str());
} else {
results.emplace(it.first, *match_addrs.begin());
}
}
}
for (const auto& it : results) {
fprintf(stdout, "%s => %08" PRIX32 "\n", it.first.c_str(), it.second);
}
}
void handle_command(const string& command) {
auto tokens = split(command, ' ');
if (tokens.empty()) {
throw runtime_error("no command given");
}
strip_trailing_whitespace(tokens[tokens.size() - 1]);
if (tokens[0] == "use") {
this->set_source_file(tokens.at(1));
} else if (tokens[0] == "match") {
this->find_all_matches(
stoul(tokens.at(1), nullptr, 16),
tokens.size() >= 2 ? stoul(tokens.at(2), nullptr, 16) : 0);
} else if (tokens[0] == "find-ppc-globals") {
this->find_ppc_rtoc_global_regs();
} else if (!tokens[0].empty()) {
throw runtime_error("unknown command");
}
}
void run_shell() {
while (!feof(stdin)) {
if (!this->src_filename.empty()) {
fprintf(stdout, "addr-trans:%s/%s> ", this->directory.c_str(), this->src_filename.c_str());
} else {
fprintf(stdout, "addr-trans:%s> ", this->directory.c_str());
}
fflush(stdout);
string command = fgets(stdin);
try {
this->handle_command(command);
} catch (const exception& e) {
this->log.error("Failed: %s", e.what());
}
}
fputc('\n', stdout);
}
private:
PrefixedLogger log;
string directory;
unordered_map<string, shared_ptr<const MemoryContext>> mems;
string src_filename;
shared_ptr<const MemoryContext> src_mem;
bool enable_ppc;
};
void run_address_translator(const std::string& directory, const std::string& use_filename, const std::string& command) {
AddressTranslator trans(directory);
if (!use_filename.empty()) {
trans.set_source_file(use_filename);
}
if (!command.empty()) {
trans.handle_command(command);
} else {
trans.run_shell();
}
}
vector<pair<uint32_t, string>> diff_dol_files(const string& a_filename, const string& b_filename) {
DOLFile a(a_filename.c_str());
DOLFile b(b_filename.c_str());
auto a_mem = make_shared<MemoryContext>();
auto b_mem = make_shared<MemoryContext>();
a.load_into(a_mem);
b.load_into(b_mem);
uint32_t min_addr = 0xFFFFFFFF;
uint32_t max_addr = 0x00000000;
for (const auto& sec : a.sections) {
min_addr = min<uint32_t>(min_addr, sec.address);
max_addr = max<uint32_t>(max_addr, sec.address + sec.data.size());
}
for (const auto& sec : b.sections) {
min_addr = min<uint32_t>(min_addr, sec.address);
max_addr = max<uint32_t>(max_addr, sec.address + sec.data.size());
}
vector<pair<uint32_t, string>> ret;
for (uint32_t addr = min_addr; addr < max_addr; addr += 4) {
bool a_exists = a_mem->exists(addr, 4);
bool b_exists = b_mem->exists(addr, 4);
if (a_exists && b_exists) {
string a_value = a_mem->read(addr, 4);
string b_value = b_mem->read(addr, 4);
if (a_value != b_value) {
if (!ret.empty() && (ret.back().first + ret.back().second.size() == addr)) {
ret.back().second += b_value;
} else {
ret.emplace_back(make_pair(addr, b_value));
}
}
}
}
return ret;
}