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/*
* 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;
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_positional("INFILE", Options::Arguments::One,
[](Options *o, const std::string &argument) {
o->extra["infile"] = argument;
});
options.parse(argc, argv);
auto input(read_file<std::string>(options.extra["infile"], Flags::Text, options.debug ? Flags::Debug : Flags::Release));
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);
// In the future, there will be code to open additional files/buffers and
// link additional objects, as well as archive members (which only get linked if needed), e.g.:
// S2WasmBuilder lazyObject(some_other_buffer, options.debug)
// linker.linkLazyObject(lazyObject); // calls builder.scan to get symbol info, then build
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;
}
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