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 ffffffff CIE
  14 # CHECK-NEXT:   Version:               1
  15 # CHECK-NEXT:   Augmentation:          "zR"
  16 # CHECK-NEXT:   Code alignment factor: 1
  17 # CHECK-NEXT:   Data alignment factor: 1
  18 # CHECK-NEXT:   Return address column: 240
  19 # CHECK-NEXT:   Augmentation data:     1A
  20
  21 .text
  22 .global _start
  23 _start:
  24  nop
  25
  26 .section .eh_frame, "a"
  27   .long 16   # Size
  28   .long 0x00 # ID
  29   .byte 0x01 # Version
  30
  31   .byte 0x7A # Augmentation string: "zR"
  32   .byte 0x52
  33   .byte 0x00
  34
  35   .byte 0x01 # Code alignment factor, ULEB128
  36   .byte 0x01 # Data alignment factor, ULEB128
  37
  38   .byte 0xF0 # Return address register, ubyte for version 1.
  39
  40   .byte 0x01 # LEB128
  41   .byte 0x1A # DW_EH_PE_pcrel | DW_EH_PE_sdata2
  42
  43   .byte 0x00
  44   .byte 0x00
  45   .byte 0x00
  46
  47   .long 10   # Size
  48   .long 24   # ID
  49 fde:
  50   .long _start - fde
  51   .word 0