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Pseudocode decompilation attempts for the test.

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Skyth
2024-09-09 13:14:27 +03:00
parent 606463ac09
commit 25ede377a1
1 changed files with 49 additions and 5 deletions
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50
PowerAnalyse/main.cpp
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@@ -1,11 +1,15 @@
#include <file.h>
#include <disasm.h>
#include <image.h>
#include <format>
#include <print>
#include <ppc.h>
int main()
{
const auto file = LoadFile("add.elf");
auto image = Image::ParseImage(file.data(), file.size()).value();
FILE* f = fopen("add.elf.cpp", "w");
for (const auto& section : image.sections)
{
@@ -32,18 +36,58 @@ int main()
base += 4;
++data;
if (insn.opcode == nullptr)
{
printf("\t%X\t%s\n", static_cast<uint32_t>(base - 4), insn.op_str);
std::println(f, "// {:x} {}", base - 4, insn.op_str);
}
else
{
std::printf("\t%X\t%s %s\n", static_cast<uint32_t>(base - 4), insn.opcode->name, insn.op_str);
std::println(f, "// {:x} {} {}", base - 4, insn.opcode->name, insn.op_str);
switch (insn.opcode->id)
{
case PPC_INST_ADD:
std::println(f, "r{} = r{} + r{};", insn.operands[0], insn.operands[1], insn.operands[2]);
break;
case PPC_INST_ADDI:
std::println(f, "r{} = r{} + {};", insn.operands[0], insn.operands[1], insn.operands[2]);
break;
case PPC_INST_STWU:
std::println(f, "ea = r{} + {};", insn.operands[2], static_cast<int32_t>(insn.operands[1]));
std::println(f, "*ea = byteswap(r{});", insn.operands[0]);
std::println(f, "r{} = ea;", insn.operands[2]);
break;
case PPC_INST_STW:
std::println(f, "*(r{} + {}) = byteswap(r{});", insn.operands[2], static_cast<int32_t>(insn.operands[1]), insn.operands[0]);
break;
case PPC_INST_MR:
std::println(f, "r{} = r{};", insn.operands[0], insn.operands[1]);
break;
case PPC_INST_LWZ:
std::println(f, "r{} = *(r{} + {});", insn.operands[0], insn.operands[2], insn.operands[1]);
break;
case PPC_INST_LI:
std::println(f, "r{} = {};", insn.operands[0], insn.operands[1]);
break;
case PPC_INST_MFLR:
std::println(f, "r{} = lr;", insn.operands[0]);
break;
case PPC_INST_MTLR:
std::println(f, "lr = r{};", insn.operands[0]);
break;
case PPC_INST_BLR:
std::println(f, "return;");
break;
case PPC_INST_BL:
std::println(f, "lr = 0x{:x};", insn.operands[0]);
std::println(f, "sub_{:x}();", insn.operands[0]);
break;
}
}
}
}
}
fclose(f);
return 0;
}