1 files changed, 140 insertions, 0 deletions
diff --git a/src/tools/s2wasm.cpp b/src/tools/s2wasm.cpp
new file mode 100644
index 000000000..9688f6696
--- /dev/null
+++ b/src/tools/s2wasm.cpp
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2015 WebAssembly Community Group participants
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+// wasm2asm console tool
+//
+
+#include "support/colors.h"
+#include "support/command-line.h"
+#include "support/file.h"
+#include "s2wasm.h"
+#include "wasm-linker.h"
+#include "wasm-printing.h"
+
+using namespace cashew;
+using namespace wasm;
+
+int main(int argc, const char *argv[]) {
+  bool ignoreUnknownSymbols = false;
+  bool generateEmscriptenGlue = false;
+  std::string startFunction;
+  std::vector<std::string> archiveLibraries;
+  Options options("s2wasm", "Link .s file into .wast");
+  options
+      .add("--output", "-o", "Output file (stdout if not specified)",
+           Options::Arguments::One,
+           [](Options *o, const std::string &argument) {
+             o->extra["output"] = argument;
+             Colors::disable();
+           })
+      .add("--ignore-unknown", "", "Ignore unknown symbols",
+           Options::Arguments::Zero,
+           [&ignoreUnknownSymbols](Options *, const std::string &) {
+             ignoreUnknownSymbols = true;
+           })
+      .add("--start", "", "Generate the start method (default: main)",
+           Options::Arguments::Optional,
+           [&startFunction](Options *, const std::string &argument) {
+             startFunction = argument.size() ? argument : "main";
+           })
+      .add("--global-base", "-g", "Where to start to place globals",
+           Options::Arguments::One,
+           [](Options *o, const std::string &argument) {
+             o->extra["global-base"] = argument;
+           })
+      .add("--allocate-stack", "-s", "Size of the user stack in linear memory",
+           Options::Arguments::One,
+           [](Options *o, const std::string &argument) {
+             o->extra["stack-allocation"] = argument;
+           })
+      .add("--initial-memory", "-i", "Initial size of the linear memory",
+           Options::Arguments::One,
+           [](Options *o, const std::string &argument) {
+             o->extra["initial-memory"] = argument;
+           })
+      .add("--max-memory", "-m", "Maximum size of the linear memory",
+           Options::Arguments::One,
+           [](Options *o, const std::string &argument) {
+             o->extra["max-memory"] = argument;
+           })
+      .add("--emscripten-glue", "-e", "Generate emscripten glue",
+           Options::Arguments::Zero,
+           [&generateEmscriptenGlue](Options *, const std::string &) {
+             generateEmscriptenGlue = true;
+           })
+      .add("--library", "-l", "Add archive library",
+           Options::Arguments::N,
+           [&archiveLibraries](Options *o, const std::string &argument) {
+             archiveLibraries.push_back(argument);
+           })
+      .add_positional("INFILE", Options::Arguments::One,
+                      [](Options *o, const std::string &argument) {
+                        o->extra["infile"] = argument;
+                      });
+  options.parse(argc, argv);
+
+  auto debugFlag = options.debug ? Flags::Debug : Flags::Release;
+  auto input(read_file<std::string>(options.extra["infile"], Flags::Text, debugFlag));
+
+  if (options.debug) std::cerr << "Parsing and wasming..." << std::endl;
+  uint64_t globalBase = options.extra.find("global-base") != options.extra.end()
+                          ? std::stoull(options.extra["global-base"])
+                          : 0;
+  uint64_t stackAllocation =
+      options.extra.find("stack-allocation") != options.extra.end()
+          ? std::stoull(options.extra["stack-allocation"])
+          : 0;
+  uint64_t initialMem =
+      options.extra.find("initial-memory") != options.extra.end()
+          ? std::stoull(options.extra["initial-memory"])
+          : 0;
+  uint64_t maxMem =
+      options.extra.find("max-memory") != options.extra.end()
+          ? std::stoull(options.extra["max-memory"])
+          : 0;
+  if (options.debug) std::cerr << "Global base " << globalBase << '\n';
+
+  Linker linker(globalBase, stackAllocation, initialMem, maxMem,
+                ignoreUnknownSymbols, startFunction, options.debug);
+
+  S2WasmBuilder mainbuilder(input.c_str(), options.debug);
+  linker.linkObject(mainbuilder);
+
+  for (const auto& m : archiveLibraries) {
+    auto archiveFile(read_file<std::vector<char>>(m, Flags::Binary, debugFlag));
+    bool error;
+    Archive lib(archiveFile, error);
+    if (error) Fatal() << "Error opening archive " << m << "\n";
+    linker.linkArchive(lib);
+  }
+
+  linker.layout();
+
+  std::stringstream meta;
+  if (generateEmscriptenGlue) {
+    if (options.debug) std::cerr << "Emscripten gluing..." << std::endl;
+    // dyncall thunks
+    linker.emscriptenGlue(meta);
+  }
+
+  if (options.debug) std::cerr << "Printing..." << std::endl;
+  Output output(options.extra["output"], Flags::Text, options.debug ? Flags::Debug : Flags::Release);
+  WasmPrinter::printModule(&linker.getOutput().wasm, output.getStream());
+  output << meta.str() << std::endl;
+
+  if (options.debug) std::cerr << "Done." << std::endl;
+}