dump_constants.cc

/* Copyright 2018 The Chromium OS Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

// Generate a .json file with all the architecture-specific constants.

#include <cstdint>
#include <iomanip>
#include <iostream>
#include <string>

#include "arch.h"
#include "libconstants.h"
#include "libsyscalls.h"

int main() {
  // Numeric values are passed to std::cout via std::to_string() to avoid
  // the use of 'bextr' asm instruction (when compiled with -march=bdver4).
  std::cout << "{\n";
  std::cout << "  \"arch_nr\": " << std::to_string(MINIJAIL_ARCH_NR) << ",\n";
  std::cout << "  \"arch_name\": \"" << MINIJAIL_ARCH_NAME << "\",\n";
  std::cout << "  \"bits\": " << std::to_string(MINIJAIL_ARCH_BITS) << ",\n";
  std::cout << "  \"syscalls\": {\n";
  bool first = true;
  for (const struct syscall_entry* entry = syscall_table; entry->name;
       ++entry) {
    if (first)
      first = false;
    else
      std::cout << ",\n";
    std::cout << "    \"" << entry->name << "\": " << std::to_string(entry->nr);
  }
  std::cout << "\n  },\n";
  std::cout << "  \"constants\": {\n";
  first = true;
  for (const struct constant_entry* entry = constant_table; entry->name;
       ++entry) {
    if (first)
      first = false;
    else
      std::cout << ",\n";
    std::cout << "    \"" << entry->name << "\": "
	      << std::to_string(entry->value);
  }
  std::cout << "\n  }\n";
  std::cout << "}\n";

  return 0;
}