test/DebugInfo/AArch64/eh_frame.s

   1 // RUN: llvm-mc -triple aarch64-none-linux-gnu -filetype=obj %s -o %t
   2 // RUN: llvm-objdump -s %t | FileCheck %s
   3         .text
   4         .globl foo
   5         .type foo,@function
   6 foo:
   7         .cfi_startproc
   8         ret
   9         .cfi_endproc
  10
  11 // The really key points we're checking here are:
  12 //  * Return register is x30.
  13 //  * Pointer format is 0x1b (GNU doesn't appear to understand others).
  14
  15 // The rest is largely incidental, but not expected to change regularly.
  16
  17 // Output is:
  18
  19 // CHECK: Contents of section .eh_frame:
  20 // CHECK-NEXT: 0000 10000000 00000000 017a5200 017c1e01  .........zR..|..
  21 // CHECK-NEXT: 0010 1b0c1f00 10000000 18000000 00000000  ................
  22
  23
  24 // Won't check the rest, it's rather incidental.
  25 // 0020 04000000 00000000                    ........
  26
  27
  28
  29 // The first CIE:
  30 // -------------------
  31 // 10000000: length of first CIE = 0x10
  32 // 00000000: This is a CIE
  33 // 03: version = 0x3
  34 // 7a 52 00: augmentation string "zR" -- pointer format is specified
  35 // 01: code alignment factor 1
  36 // 7c: data alignment factor -4
  37 // 1e: return address register 30 (== x30).
  38 // 01: 1 byte of augmentation
  39 // 1b: pointer format 1b: DW_EH_PE_pcrel | DW_EH_PE_sdata4
  40 // 0c 1f 00: initial instructions: "DW_CFA_def_cfa x31 ofs 0" in this case
  41
  42 // Next the FDE:
  43 // -------------
  44 // 10000000: FDE length 0x10
  45 // 18000000: Uses CIE 0x18 backwards (only coincidentally same as above)
  46 // 00000000: PC begin for this FDE is at 00000000 (relocation is applied here)
  47 // 04000000: FDE applies up to PC begin+0x14
  48 // 00: Augmentation string length 0 for this FDE