llvm/test/ExecutionEngine/JITLink/i386/ELF_external_to_absolute_conversion.s

   1 # RUN: llvm-mc -triple=i386-unknown-linux-gnu -filetype=obj -o %t %s
   2 # RUN: llvm-jitlink -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         .globl  main
  17         .p2align        4, 0x90
  18         .type   main,@function
  19 main:
  20         pushl   %ebp
  21         movl    %esp, %ebp
  22         pushl   %eax
  23         calll   .L0$pb
  24 .L0$pb:
  25         popl    %eax
  26 .Ltmp0:
  27         addl    $_GLOBAL_OFFSET_TABLE_+(.Ltmp0-.L0$pb), %eax
  28         movl    $0, -4(%ebp)
  29         movl    a@GOTOFF(%eax), %eax
  30         addl    $4, %esp
  31         popl    %ebp
  32         retl
  33         .size   main, .-main
  34
  35
  36         .type   a,@object                       # @a
  37         .data
  38         .p2align        2
  39 a:
  40         .long   42                              # 0x2a
  41         .size   a, 4