lld/test/ELF/arm-exidx-shared.s

   1 // REQUIRES: arm
   2 // RUN: llvm-mc -filetype=obj -arm-add-build-attributes -triple=armv7a-none-linux-gnueabi %s -o %t
   3 // RUN: ld.lld --hash-style=sysv %t --shared -o %t2
   4 // RUN: llvm-readobj --relocations %t2 | FileCheck %s
   5 // RUN: llvm-objdump -s --triple=armv7a-none-linux-gnueabi %t2 | FileCheck --check-prefix=CHECK-EXTAB-NEXT %s
   6
   7 // Check that the relative R_ARM_PREL31 relocation can access a PLT entry
   8 // for when the personality routine is referenced from a shared library.
   9 // Also check that the R_ARM_NONE no-op relocation can be used in a shared
  10 // library.
  11  .syntax unified
  12 // Will produce an ARM.exidx entry with an R_ARM_NONE relocation to
  13 // __aeabi_unwind_cpp_pr0
  14  .section .text.func1, "ax",%progbits
  15  .global func1
  16 func1:
  17  .fnstart
  18  bx lr
  19  .fnend
  20
  21 // Will produce a R_ARM_PREL31 relocation with respect to the PLT entry of
  22 // __gxx_personality_v0
  23  .section .text.func2, "ax",%progbits
  24  .global func2
  25 func2:
  26  .fnstart
  27  bx lr
  28  .personality __gxx_personality_v0
  29  .handlerdata
  30  .long 0
  31  .section .text.func2
  32  .fnend
  33
  34  .section .text.__aeabi_unwind_cpp_pr0, "ax", %progbits
  35  .global __aeabi_unwind_cpp_pr0
  36 __aeabi_unwind_cpp_pr0:
  37  bx lr
  38
  39 // CHECK: Relocations [
  40 // CHECK-NEXT:   Section {{.*}} .rel.plt {
  41 // CHECK-NEXT:     0x302DC R_ARM_JUMP_SLOT __gxx_personality_v0
  42
  43 // CHECK-EXTAB: Contents of section .ARM.extab:
  44 // 0x0238 + 0x1038 = 0x1270 = __gxx_personality_v0(PLT)
  45 // CHECK-EXTAB-NEXT: 0238 38000100 b0b0b000 00000000