lld/test/ELF/linkerscript/discard-section.s

   1 # REQUIRES: x86
   2 ## Test relocations referencing symbols defined relative to sections discarded by /DISCARD/.
   3
   4 # RUN: rm -rf %t && split-file %s %t && cd %t
   5 # RUN: llvm-mc -filetype=obj -triple=x86_64 a.s -o a.o
   6 # RUN: llvm-mc -filetype=obj -triple=x86_64 b.s -o b.o
   7 # RUN: not ld.lld --threads=1 -T a.lds a.o b.o -z undefs -o /dev/null 2>&1 | FileCheck %s --check-prefix=LOCAL --implicit-check-not=error:
   8 # RUN: not ld.lld --threads=1 -T a.lds a.o b.o -o /dev/null 2>&1 | FileCheck %s --check-prefixes=LOCAL,NONLOCAL --implicit-check-not=error:
   9 # RUN: ld.lld -r -T a.lds a.o b.o -o a.ro 2>&1 | FileCheck %s --check-prefix=WARNING --implicit-check-not=warning:
  10 # RUN: llvm-readelf -r -s a.ro | FileCheck %s --check-prefix=RELOC
  11
  12 # LOCAL:      error: relocation refers to a discarded section: .aaa
  13 # LOCAL-NEXT: >>> defined in a.o
  14 # LOCAL-NEXT: >>> referenced by a.o:(.bbb+0x0)
  15
  16 # NONLOCAL:      error: relocation refers to a symbol in a discarded section: global
  17 # NONLOCAL-NEXT: >>> defined in a.o
  18 # NONLOCAL-NEXT: >>> referenced by b.o:(.data+0x0)
  19
  20 # NONLOCAL:      error: relocation refers to a symbol in a discarded section: weak
  21 # NONLOCAL-NEXT: >>> defined in a.o
  22 # NONLOCAL-NEXT: >>> referenced by b.o:(.data+0x8)
  23
  24 # NONLOCAL:      error: relocation refers to a symbol in a discarded section: weakref1
  25 # NONLOCAL-NEXT: >>> defined in a.o
  26 # NONLOCAL-NEXT: >>> referenced by b.o:(.data+0x10)
  27
  28 # NONLOCAL:      error: relocation refers to a symbol in a discarded section: weakref2
  29 # NONLOCAL-NEXT: >>> defined in a.o
  30 # NONLOCAL-NEXT: >>> referenced by b.o:(.data+0x18)
  31
  32 # WARNING:      warning: relocation refers to a discarded section: .aaa
  33 # WARNING-NEXT: >>> referenced by a.o:(.rela.bbb+0x0)
  34
  35 # RELOC:      Relocation section '.rela.bbb' at offset {{.*}} contains 1 entries:
  36 # RELOC-NEXT:     Offset             Info             Type               Symbol's Value  Symbol's Name + Addend
  37 # RELOC-NEXT: 0000000000000000  0000000000000000 R_X86_64_NONE                             0
  38 # RELOC-EMPTY:
  39 # RELOC-NEXT: Relocation section '.rela.data' at offset {{.*}} contains 4 entries:
  40 # RELOC-NEXT:     Offset             Info             Type               Symbol's Value  Symbol's Name + Addend
  41 # RELOC-NEXT: 0000000000000000  0000000500000001 R_X86_64_64            0000000000000000 global + 0
  42 # RELOC-NEXT: 0000000000000008  0000000700000001 R_X86_64_64            0000000000000000 weak + 0
  43 # RELOC-NEXT: 0000000000000010  0000000600000001 R_X86_64_64            0000000000000000 weakref1 + 0
  44 # RELOC-NEXT: 0000000000000018  0000000800000001 R_X86_64_64            0000000000000000 weakref2 + 0
  45
  46 # RELOC:      Num:    Value          Size Type    Bind   Vis      Ndx Name
  47 # RELOC-NEXT:   0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND
  48 # RELOC-NEXT:   1: 0000000000000000     0 SECTION LOCAL  DEFAULT    1 .text
  49 # RELOC-NEXT:   2: 0000000000000000     0 SECTION LOCAL  DEFAULT    2 .bbb
  50 # RELOC-NEXT:   3: 0000000000000000     0 SECTION LOCAL  DEFAULT    4 .data
  51 # RELOC-NEXT:   4: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT    1 _start
  52 # RELOC-NEXT:   5: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT   UND global
  53 # RELOC-NEXT:   6: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT   UND weakref1
  54 # RELOC-NEXT:   7: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT   UND weak
  55 # RELOC-NEXT:   8: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT   UND weakref2
  56 # RELOC-EMPTY:
  57
  58 #--- a.s
  59 .globl _start
  60 _start:
  61
  62 .section .aaa,"a"
  63 .globl global, weakref1
  64 .weak weak, weakref2
  65 global:
  66 weak:
  67 weakref1:
  68 weakref2:
  69   .quad 0
  70
  71 .section .bbb,"aw"
  72   .quad .aaa
  73
  74 #--- b.s
  75 .weak weakref1, weakref2
  76 .section .data,"aw"
  77   .quad global
  78   .quad weak
  79   .quad weakref1
  80   .quad weakref2
  81
  82 #--- a.lds
  83 SECTIONS { /DISCARD/ : { *(.aaa) } }