Hello World on Windows x64

hello.c

#include <stdio.h>

#if defined(_MSC_VER)
#  pragma section(".text", read, execute)
__declspec(allocate(".text"))
#elif defined(__GNUC__)
__attribute__((section(".text")))
#endif
const char code[] =
  // push %rbp
  "\x55"
  // mov %rsp,%rbp
  "\x48\x89\xe5"
  // mov %rcx,%rax
  "\x48\x89\xc8"
  // lea 0x0f(%rip),%rcx
  "\x48\x8d\x0d\x0f\x00\x00\x00"
  // sub $0x20,%rsp
  "\x48\x83\xec\x20"
  // callq *%rax
  "\xff\xd0"
  // add $0x20,%rsp
  "\x48\x83\xc4\x20"
  // mov %rbp,%rsp
  "\x48\x89\xec"
  // pop %rbp
  "\x5d"
  // retq
  "\xc3"
  // String data
  "Hello World!";

int
main()
{
  // DWORD old_protect;
  // VirtualProtect((LPVOID) code, sizeof(code), PAGE_EXECUTE_READWRITE, &old_protect);
  ((void (*)(int (*)(const char *))) (char *) code)(puts);
  return 0;
}