lld/test/ELF/arm-exidx-emit-relocs.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 --emit-relocs %t -o %t2
   4 // RUN: llvm-objdump -s --triple=armv7a-none-linux-gnueabi %t2 | FileCheck %s
   5 // RUN: llvm-readelf --relocs %t2 | FileCheck -check-prefix=CHECK-RELOCS %s
   6
   7 // RUN: llvm-mc -filetype=obj --arm-add-build-attributes -triple=armv7aeb-none-linux-gnueabi -mcpu=cortex-a8 %s -o %t
   8 // RUN: ld.lld --emit-relocs %t -o %t2
   9 // RUN: llvm-objdump -s --triple=armv7aeb-none-linux-gnueabi %t2 | FileCheck -check-prefix=CHECK-EB %s
  10 // RUN: llvm-readelf --relocs %t2 | FileCheck -check-prefix=CHECK-RELOCS %s
  11
  12 // RUN: ld.lld --be8 --emit-relocs %t -o %t2
  13 // RUN: llvm-objdump -s --triple=armv7aeb-none-linux-gnueabi %t2 | FileCheck -check-prefix=CHECK-EB %s
  14 // RUN: llvm-readelf --relocs %t2 | FileCheck -check-prefix=CHECK-RELOCS %s
  15
  16 /// LLD does not support --emit-relocs for .ARM.exidx sections as the relocations
  17 /// from synthetic table entries won't be represented. Given the known use cases
  18 /// of --emit-relocs, relocating kernels, and binary analysis, the former doesn't
  19 /// use exceptions and the latter can derive the relocations from the table if
  20 /// they need them.
  21  .syntax unified
  22  /// Will produce an ARM.exidx entry with inline unwinding instructions
  23  .section .text.func1, "ax",%progbits
  24  .global func1
  25 func1:
  26  .fnstart
  27  bx lr
  28  .save {r7, lr}
  29  .setfp r7, sp, #0
  30  .fnend
  31
  32  .syntax unified
  33  .section .text.func2, "ax",%progbits
  34 /// A function with the same inline unwinding instructions, expect merge.
  35  .global func2
  36 func2:
  37  .fnstart
  38  bx lr
  39  .save {r7, lr}
  40  .setfp r7, sp, #0
  41  .fnend
  42
  43  .section .text.25, "ax", %progbits
  44  .global func25
  45 func25:
  46         .fnstart
  47         bx lr
  48         .cantunwind
  49         .fnend
  50
  51  .section .text.26, "ax", %progbits
  52  .global func26
  53 func26:
  54         .fnstart
  55         bx lr
  56         .cantunwind
  57         .fnend
  58
  59  .syntax unified
  60  .section .text.func3, "ax",%progbits
  61 /// A function with the same inline unwinding instructions, expect merge.
  62  .global func3
  63 func3:
  64  .fnstart
  65  bx lr
  66  .save {r7, lr}
  67  .setfp r7, sp, #0
  68  .fnend
  69
  70  .section .text.__aeabi_unwind_cpp_pr0, "ax", %progbits
  71  .global __aeabi_unwind_cpp_pr0
  72 __aeabi_unwind_cpp_pr0:
  73  bx lr
  74
  75 // CHECK: Contents of section .ARM.exidx:
  76 // CHECK-NEXT:  100d4 28000100 08849780 28000100 01000000
  77 // CHECK-NEXT:  100e4 28000100 08849780 24000100 01000000
  78 // CHECK-NEXT:  100f4 20000100 01000000
  79
  80 // CHECK-RELOCS-NOT: Relocation section '.rel.ARM.exidx'
  81
  82 // CHECK-EB: Contents of section .ARM.exidx:
  83 // CHECK-EB-NEXT: 100d4 00010028 80978408 00010028 00000001
  84 // CHECK-EB-NEXT: 100e4 00010028 80978408 00010024 00000001
  85 // CHECK-EB-NEXT: 100f4 00010020 00000001
  86