Function sys_write

src/syscall.cpp:85–95

}

[[nodiscard]] auto sys_write(int fd, const char* buf, size_t len) -> int {
  // 简单实现：仅支持向标准输出(1)和错误输出(2)打印
  if (fd == 1 || fd == 2) {
    /// @todo应该检查 buf 是否在用户空间合法范围内
    for (size_t i = 0; i < len; ++i) {
      etl_putchar(buf[i]);
    }
    return static_cast<int>(len);
  }
  return -1;
}

auto sys_exit(int code) -> int {
  klog::Info("[Syscall] Process {} exited with code {}",