llvm/test/ExecutionEngine/JITLink/x86-64/ELF_external_to_absolute_conversion.s

   1 # RUN: llvm-mc -triple=x86_64-unknown-linux-gnu -filetype=obj -o %t %s
   2 # RUN: llvm-jitlink -phony-externals -noexec %t
   3 #
   4 # Check that symbol scope is demoted to local when external symbols are
   5 # converted to absolutes. This is demotion is necessary to avoid "unexpected
   6 # definition" errors.
   7 #
   8 # The reference to _GLOBAL_OFFSET_TABLE_ will trigger creation of an external
   9 # _GLOBAL_OFFSET_TABLE_ symbol, and the GOTOFF relocation will force creation
  10 # of a GOT symbol without actually introducing any GOT entries. Together these
  11 # should cause the external _GLOBAL_OFFSET_TABLE_ symbol to be converted to an
  12 # absolute symbol with address zero. If the scope is not demoted correctly this
  13 # will trigger an "unexpected definition" error.
  14
  15         .text
  16         .file   "ELF_external_to_absolute_conversion.s"
  17         .globl  main
  18         .p2align        4, 0x90
  19         .type   main,@function
  20 main:
  21 .L0$pb:
  22         leaq    .L0$pb(%rip), %rax
  23         movabsq $_GLOBAL_OFFSET_TABLE_-.L0$pb, %rcx
  24         movabsq $_foo@GOTOFF, %rax
  25         xorq    %rax, %rax
  26         retq