amd64 Example

      extern int foo;
      extern int bar(int);
      int call_bar(void) {
         return bar(foo);
      }

      movq    foo@GOTPCREL(%rip), %rax  # load foo's address from GOT
      movl    (%rax), %edi              # read foo's value
      call    bar@PLT                   # call bar's PLT stub

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