lld/test/ELF/debug-dead-reloc-32.s

   1 # REQUIRES: x86
   2 ## Test we resolve symbolic relocations in .debug_* sections to a tombstone
   3 ## value if the referenced symbol is discarded (--gc-sections, non-prevailing
   4 ## section group, SHF_EXCLUDE, /DISCARD/, etc).
   5
   6 # RUN: llvm-mc -filetype=obj -triple=i386 %s -o %t.o
   7 # RUN: ld.lld %t.o -o %t
   8 # RUN: llvm-objdump -s %t | FileCheck %s
   9
  10 # CHECK:      Contents of section .debug_loc:
  11 # CHECK-NEXT:  0000 01000000
  12 # CHECK-NEXT: Contents of section .debug_ranges:
  13 # CHECK-NEXT:  0000 01000000
  14 # CHECK-NEXT: Contents of section .debug_addr:
  15 # CHECK-NEXT:  0000 00000000
  16 # CHECK-NEXT: Contents of section .debug_names:
  17 # CHECK-NEXT:  0000 ffffffff
  18
  19 ## -z dead-reloc-in-nonalloc= can override the tombstone value.
  20 # RUN: ld.lld -z dead-reloc-in-nonalloc=.debug_loc=42 -z dead-reloc-in-nonalloc=.debug_addr=0xfffffffffffffffe %t.o -o %t1
  21 # RUN: llvm-objdump -s %t1 | FileCheck %s --check-prefix=OVERRIDE
  22
  23 # OVERRIDE:      Contents of section .debug_loc:
  24 # OVERRIDE-NEXT:  0000 2a000000                             *...
  25 # OVERRIDE-NEXT: Contents of section .debug_ranges:
  26 # OVERRIDE-NEXT:  0000 01000000                             ....
  27 # OVERRIDE-NEXT: Contents of section .debug_addr:
  28 # OVERRIDE-NEXT:  0000 feffffff                             ....
  29
  30 .section .text.1,"axe"
  31   .byte 0
  32
  33 ## Resolved to UINT32_C(-2), with the addend ignored.
  34 ## UINT32_C(-1) is a reserved value (base address selection entry) which can't be used.
  35 .section .debug_loc
  36   .long .text.1+8
  37 .section .debug_ranges
  38   .long .text.1+16
  39
  40 ## Resolved to UINT32_C(0), with the addend ignored.
  41 .section .debug_addr
  42   .long .text.1+8
  43
  44 .section  .debug_info,"eG",@progbits,5657452045627120676,comdat
  45 .Ltu_begin0:
  46
  47 .section .debug_names
  48 ## .debug_names may reference a local type unit defined in a COMDAT .debug_info
  49 ## section (-g -gpubnames -fdebug-types-section). If the referenced section is
  50 ## non-prevailing, resolve to UINT32_MAX.
  51 .long .Ltu_begin0