llvm/test/tools/llvm-dwarfdump/X86/eh-frame-return-address-reg.s

   1 # RUN: llvm-mc %s -filetype obj -triple x86_64-pc-linux -o %t.o
   2 # RUN: llvm-dwarfdump -v %t.o | FileCheck %s
   3
   4 # The format of the .eh_frame section is similar in
   5 # format and purpose to the .debug_frame section.
   6 # Version 1 is often used for .eh_frame,
   7 # and also it was used for DWARF v2. For that case,
   8 # return address register should be encoded as ubyte,
   9 # while later versions use ULEB128. This test case
  10 # checks that we are able to dump it correctly.
  11
  12 # CHECK:      .eh_frame contents:
  13 # CHECK:      00000000 00000010 00000000 CIE
  14 # CHECK-NEXT:   Format:                DWARF32
  15 # CHECK-NEXT:   Version:               1
  16 # CHECK-NEXT:   Augmentation:          "zR"
  17 # CHECK-NEXT:   Code alignment factor: 1
  18 # CHECK-NEXT:   Data alignment factor: 1
  19 # CHECK-NEXT:   Return address column: 240
  20 # CHECK-NEXT:   Augmentation data:     1A
  21
  22 .text
  23 .global _start
  24 _start:
  25  nop
  26
  27 .section .eh_frame,"a",@unwind
  28   .long 16   # Size
  29   .long 0x00 # ID
  30   .byte 0x01 # Version
  31
  32   .byte 0x7A # Augmentation string: "zR"
  33   .byte 0x52
  34   .byte 0x00
  35
  36   .byte 0x01 # Code alignment factor, ULEB128
  37   .byte 0x01 # Data alignment factor, ULEB128
  38
  39   .byte 0xF0 # Return address register, ubyte for version 1.
  40
  41   .byte 0x01 # LEB128
  42   .byte 0x1A # DW_EH_PE_pcrel | DW_EH_PE_sdata2
  43
  44   .byte 0x00
  45   .byte 0x00
  46   .byte 0x00
  47
  48   .long 10   # Size
  49   .long 24   # ID
  50 fde:
  51   .long _start - fde
  52   .word 0