lld/test/ELF/eh-frame-value-format7.s

   1 # REQUIRES: x86
   2
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
   4 # RUN: ld.lld --eh-frame-hdr --section-start .text=0x1000 %t.o -o %t
   5 # RUN: llvm-readobj -S --section-data %t | FileCheck %s
   6
   7 ## Check we are able to handle DW_EH_PE_udata2 encoding.
   8
   9 # CHECK:      Section {
  10 # CHECK:        Index:
  11 # CHECK:        Name: .eh_frame_hdr
  12 # CHECK-NEXT:   Type: SHT_PROGBITS
  13 # CHECK-NEXT:   Flags [
  14 # CHECK-NEXT:     SHF_ALLOC
  15 # CHECK-NEXT:   ]
  16 # CHECK-NEXT:   Address: 0x2004
  17 # CHECK-NEXT:   Offset: 0x1004
  18 # CHECK-NEXT:   Size: 20
  19 # CHECK-NEXT:   Link: 0
  20 # CHECK-NEXT:   Info: 0
  21 # CHECK-NEXT:   AddressAlignment: 4
  22 # CHECK-NEXT:   EntrySize: 0
  23 # CHECK-NEXT:   SectionData (
  24 # CHECK-NEXT:     0000: 011B033B 10000000 01000000 30F2FFFF
  25 # CHECK-NEXT:     0010: 26000000
  26 # Header (always 4 bytes): 011B033B
  27 #    10000000 = .eh_frame(0x2018) - .eh_frame_hdr(0x2004) - 4
  28 #    01000000 = 1 = the number of FDE pointers in the table.
  29 # 30F2FFFF = foo(0x1000) - 0x234(addend) - .eh_frame_hdr(0x2004)
  30
  31 # CHECK:      Section {
  32 # CHECK:        Index:
  33 # CHECK:        Name: .eh_frame
  34 # CHECK-NEXT:   Type: SHT_PROGBITS
  35 # CHECK-NEXT:   Flags [
  36 # CHECK-NEXT:     SHF_ALLOC
  37 # CHECK-NEXT:   ]
  38 # CHECK-NEXT:   Address: 0x2018
  39 # CHECK-NEXT:   Offset: 0x1018
  40 # CHECK-NEXT:   Size:
  41 # CHECK-NEXT:   Link:
  42 # CHECK-NEXT:   Info:
  43 # CHECK-NEXT:   AddressAlignment:
  44 # CHECK-NEXT:   EntrySize:
  45 # CHECK-NEXT:   SectionData (
  46 # CHECK-NEXT:     0000: 0E000000 00000000 01525300 01010102
  47 # CHECK-NEXT:     0010: FF000600 00001600 00003412 00000000
  48 #                                             ^
  49 #                       ---> ADDR(foo) + 0x234 = 0x1234
  50
  51 .text
  52 .global foo
  53 foo:
  54  nop
  55
  56 .section .eh_frame,"a",@unwind
  57   .long 14   # Size
  58   .long 0x00 # ID
  59   .byte 0x01 # Version.
  60
  61   .byte 0x52 # Augmentation string: 'R','S','\0'
  62   .byte 0x53
  63   .byte 0x00
  64
  65   .byte 0x01
  66
  67   .byte 0x01 # LEB128
  68   .byte 0x01 # LEB128
  69
  70   .byte 0x02 # DW_EH_PE_udata2
  71
  72   .byte 0xFF
  73   .byte 0
  74
  75   .long 0x6  # Size
  76   .long 0x16 # ID
  77   .short foo + 0x234