lld/test/ELF/comdat-discarded-reloc.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %p/Inputs/comdat-discarded-reloc.s -o %t2.o
   4 # RUN: ld.lld -gc-sections --noinhibit-exec %t2.o %t.o -o /dev/null
   5 # RUN: ld.lld -r %t2.o %t.o -o %t 2>&1 | FileCheck --check-prefix=WARN %s
   6 # RUN: llvm-readobj -r %t | FileCheck --check-prefix=RELOC %s
   7
   8 ## ELF spec doesn't allow a relocation to point to a deduplicated
   9 ## COMDAT section. Unfortunately this happens in practice (e.g. .eh_frame)
  10 ## Test case checks we do not crash.
  11
  12 # WARN: warning: relocation refers to a discarded section: .text.bar1
  13 # WARN-NEXT: >>> referenced by {{.*}}.o:(.rela.text.bar2+0x0)
  14 # WARN-NOT: warning
  15
  16 # RELOC:      .rela.eh_frame {
  17 # RELOC-NEXT:   R_X86_64_NONE
  18 # RELOC-NEXT: }
  19 # RELOC-NEXT: .rela.debug_foo {
  20 # RELOC-NEXT:   R_X86_64_NONE
  21 # RELOC-NEXT: }
  22 # RELOC-NEXT: .rela.gcc_except_table {
  23 # RELOC-NEXT:   R_X86_64_NONE
  24 # RELOC-NEXT: }
  25
  26 .globl group
  27 group:
  28 .section .text.bar1,"aG",@progbits,group,comdat
  29
  30 ## .text.bar1 in this file is discarded. Warn on the relocation.
  31 .section .text.bar2,"ax"
  32 .globl bar
  33 bar:
  34   .quad .text.bar1
  35
  36 ## Don't warn on .eh_frame, .debug*, .zdebug*, or .gcc_except_table
  37 .section .eh_frame,"a",@unwind
  38   .quad .text.bar1
  39
  40 .section .debug_foo
  41   .quad .text.bar1
  42
  43 .section .gcc_except_table,"a"
  44   .quad .text.bar1