Initial commit

CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_minimum_required (VERSION 3.8)
+
+project ("dwarbf")
+
+add_subdirectory("dwarfas")
+add_subdirectory("dwarfter")
+add_subdirectory("dwarbf")

README

@@ -0,0 +1,7 @@
+# dwarbf - A Brainfuck interpreter written in DWARF debug information
+
+Run the BF program with:
+
+```shell
+$ gdb --eval-command=starti --eval-command="p (int)&dwarbf_program" fib --batch
+```

dwarbf/CMakeLists.txt

@@ -0,0 +1,12 @@
+add_executable (dwarbf "dwarbf.cpp")
+target_link_libraries(dwarbf PRIVATE dwarfas dwarfter)
+
+file(READ ${CMAKE_CURRENT_SOURCE_DIR}/dwarbf.dw INTERPRETER_TEXT)
+file(TOUCH ${CMAKE_CURRENT_SOURCE_DIR}/dwarbf_interpreter.hpp.in)
+configure_file(
+    ${CMAKE_CURRENT_SOURCE_DIR}/dwarbf_interpreter.hpp.in
+    ${CMAKE_CURRENT_BINARY_DIR}/dwarbf_interpreter.gen.hpp
+    @ONLY
+)
+
+target_include_directories(dwarbf PRIVATE ${CMAKE_CURRENT_BINARY_DIR})

dwarbf/dwarbf.cpp

@@ -0,0 +1,42 @@
+#include <string>
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <dwarfas.hpp>
+#include <dwarfter.hpp>
+#include "dwarbf_interpreter.gen.hpp"
+
+void print_usage() {
+    std::cerr << "Usage: dwarbf <input_file> [--run/--debug]\n";
+}
+int main(int argc, const char** argv) {
+    if (argc < 2 or !std::filesystem::exists(argv[1])) {
+        print_usage();
+        return -1;
+    }
+    std::filesystem::path program_path = argv[1];
+    std::ifstream program_file(program_path);
+    std::ostringstream program_text;
+    program_text << program_file.rdbuf();
+
+    auto dwarf_program = dwas::assemble_dwarf_program(dwarbf::interpreter_text);
+    auto load_segment = dwas::create_elf(
+        dwarf_program, "dwarbf", 
+        program_text.str(), "dwarbf_program", 
+        program_path.replace_extension());
+
+    if (argc > 3) {
+        print_usage();
+        return -1;
+    }
+    if (argc == 3) {
+        if (std::string(argv[2]) == "--run" or std::string(argv[2]) == "--debug") {
+            auto debug = std::string(argv[2]) == "--debug";
+            dwter::eval(load_segment, 0x08048000, 0x08048025, dwarf_program, debug);
+        }
+        else {
+            print_usage();
+            return -1;
+        }
+    }
+}