lld/test/ELF/relocation-copy-relro.s

   1 // REQUIRES: x86
   2
   3 // Reserve space for copy relocations of read-only symbols in .bss.rel.ro
   4
   5 // RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
   6 // RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %p/Inputs/relocation-copy-relro.s -o %t2.o
   7 // RUN: ld.lld -shared %t2.o -soname=so -o %t.so
   8 // RUN: ld.lld %t.o %t.so -o %t3
   9 // RUN: llvm-readobj -S -l -r %t3 | FileCheck %s
  10
  11 /// Due to -z rodynamic, The only RELRO section is .bss.rel.ro. Test that we
  12 /// still append the .relro_padding section.
  13 // RUN: ld.lld -z rodynamic %t.o %t.so -o %t4
  14 // RUN: llvm-readelf -S -l %t4 | FileCheck %s --check-prefix=CHECK2
  15
  16 // CHECK:        Name: .bss.rel.ro
  17 // CHECK-NEXT:   Type: SHT_NOBITS (0x8)
  18 // CHECK-NEXT:   Flags [ (0x3)
  19 // CHECK-NEXT:     SHF_ALLOC (0x2)
  20 // CHECK-NEXT:     SHF_WRITE (0x1)
  21 // CHECK-NEXT:   ]
  22 // CHECK-NEXT:   Address: 0x202368
  23 // CHECK-NEXT:   Offset: 0x368
  24 // CHECK-NEXT:   Size: 8
  25
  26 // CHECK:      Type: PT_GNU_RELRO (0x6474E552)
  27 // CHECK-NEXT: Offset: 0x2A8
  28 // CHECK-NEXT: VirtualAddress: 0x2022A8
  29 // CHECK-NEXT: PhysicalAddress: 0x2022A8
  30 // CHECK-NEXT: FileSize: 192
  31 // CHECK-NEXT: MemSize: 3416
  32
  33 // CHECK: 0x202368 R_X86_64_COPY a 0x0
  34 // CHECK: 0x20236C R_X86_64_COPY b 0x0
  35
  36 // CHECK2:      LOAD           0x000356 0x0000000000202356 0x0000000000202356 0x000000 0x000caa RW  0x1000
  37 // CHECK2:      DYNAMIC        0x000258 0x0000000000200258 0x0000000000200258 0x0000b0 0x0000b0 R   0x8
  38 // CHECK2:      GNU_RELRO      0x000356 0x0000000000202356 0x0000000000202356 0x000000 0x000caa R   0x1
  39
  40 // CHECK2:      Section to Segment mapping:
  41 // CHECK2-NEXT:  Segment Sections...
  42 // CHECK2-NEXT:   00
  43 // CHECK2-NEXT:   01     .dynsym .gnu.hash .hash .dynamic .dynstr .rela.dyn
  44 // CHECK2-NEXT:   02     .text
  45 // CHECK2-NEXT:   03     .bss.rel.ro .relro_padding
  46 // CHECK2-NEXT:   04     .dynamic
  47 // CHECK2-NEXT:   05     .bss.rel.ro .relro_padding
  48 // CHECK2-NEXT:   06
  49
  50 .text
  51 .global _start
  52 _start:
  53 movl $1, a
  54 movl $2, b