1 files changed, 39 insertions, 0 deletions
diff --git a/disasm/extractfunction.cpp b/disasm/extractfunction.cpp
new file mode 100644
index 0000000..6d6f7bc
--- /dev/null
+++ b/disasm/extractfunction.cpp
@@ -0,0 +1,39 @@
+#include "extractfunction.hpp"
+
+#include "parsefileandrewind.hpp"
+
+#include <distorm.h>
+
+#include <iomanip>
+
+void extract_function(std::istream& is, binparse::Value32 object_id, binparse::Offset32 function_offset) {
+	
+	auto file = parse_file_and_rewind(is);
+	
+	is.ignore(file.le_header.data_page_offset);
+	
+	_DInst decodedInstructions[1];
+	_DecodeType dt = Decode32Bits;
+	unsigned int decodedInstructionsCount = 0;
+	
+	auto object = file.object_table.entries[object_id];
+	unsigned int object_size = object.nr_page_table_entries * file.le_header.page_size;
+	
+	std::vector<uint8_t> code_buf;
+	code_buf.reserve(object_size);
+	std::copy_n(std::istream_iterator<uint8_t>(is), object_size, std::back_inserter(code_buf));
+	
+	_CodeInfo ci;
+	ci.code = code_buf.data() + function_offset;
+	ci.codeLen = code_buf.size() - function_offset;
+	ci.codeOffset = object.reloc_base_address + function_offset;
+	ci.dt = dt;
+	ci.features = DF_NONE;
+	
+	distorm_decompose64(&ci, decodedInstructions, 1, &decodedInstructionsCount);
+	
+	_DecodedInst inst;
+	distorm_format64(&ci, &decodedInstructions[0], &inst);
+	
+	std::cout << std::hex << std::setw(8) << std::setfill('0') << inst.offset << ":\t" << inst.mnemonic.p << " " << inst.operands.p << std::endl;
+}