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Partially Implement Decompiler Type Analysis (#90)

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* implement basic framework for decompiler type analysis

* before type system changes

* add some decompiler stuff to the type system

* try algorithm on a few functions
This commit is contained in:
water111
2020-10-18 15:44:19 -04:00
committed by GitHub
parent 3e798cd3aa
commit fc1a8f37c6
19 changed files with 1064 additions and 36 deletions
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decompiler/ObjectFile/LinkedObjectFile.cpp
+31 -3
View File
@@ -2,11 +2,13 @@
* @file LinkedObjectFile.cpp
* An object file's data with linking information included.
*/
#include "LinkedObjectFile.h"
#include <algorithm>
#include <cassert>
#include <cstring>
#include <numeric>
#include "third-party/fmt/format.h"
#include "LinkedObjectFile.h"
#include "decompiler/Disasm/InstructionDecode.h"
#include "decompiler/config.h"
@@ -556,9 +558,10 @@ std::string LinkedObjectFile::print_disassembly() {
auto& word = words_by_seg[seg].at(func.start_word + i);
append_word_to_string(result, word);
} else {
// print basic op stuff
if (func.has_basic_ops() && func.instr_starts_basic_op(i)) {
if (line.length() < 40) {
line.append(40 - line.length(), ' ');
if (line.length() < 30) {
line.append(30 - line.length(), ' ');
}
line += ";; " + func.get_basic_op_at_instr(i)->print(*this);
for (int iidx = 0; iidx < instr.n_src; iidx++) {
@@ -569,6 +572,31 @@ std::string LinkedObjectFile::print_disassembly() {
}
}
}
// print type map
if (func.has_typemaps()) {
if (line.length() < 60) {
line.append(60 - line.length(), ' ');
}
line += " tm: ";
auto& tm = func.get_typemap_by_instr_idx(i);
bool added = false;
for (auto reg_kind : {Reg::RegisterKind::GPR, Reg::RegisterKind::FPR}) {
for (int reg_idx = 0; reg_idx < 32; reg_idx++) {
auto gpr = Register(reg_kind, reg_idx);
auto kv = tm.find(gpr);
if (kv != tm.end()) {
added = true;
line += fmt::format("{}: {}, ", gpr.to_charp(), kv->second.print());
}
}
}
if (added) {
line.pop_back();
line.pop_back();
}
}
}
result += line + "\n";
}