lld/test/ELF/eh-frame-hdr-icf-fde.s

   1 # REQUIRES: x86
   2
   3 ## Testcase checks that we correctly deduplicate FDEs when ICF
   4 ## merges two sections.
   5
   6 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
   7 # RUN: ld.lld %t -o %t2 --icf=all --eh-frame-hdr
   8 # RUN: llvm-readobj -r %t | FileCheck %s --check-prefix=OBJ
   9 # RUN: llvm-readobj -S --section-data %t2 | FileCheck %s
  10
  11 # OBJ:      Relocations [
  12 # OBJ-NEXT:   Section {{.*}} .rela.eh_frame {
  13 # OBJ-NEXT:     0x20 R_X86_64_PC32 .text.f1 0x0
  14 # OBJ-NEXT:     0x34 R_X86_64_PC32 .text.f1 0x2
  15 # OBJ-NEXT:     0x48 R_X86_64_PC32 .text.f2 0x0
  16 # OBJ-NEXT:     0x5C R_X86_64_PC32 .text.f2 0x2
  17 # OBJ-NEXT:   }
  18 # OBJ-NEXT: ]
  19
  20 # CHECK:      Section {
  21 # CHECK:        Index: 1
  22 # CHECK:        Name: .eh_frame_hdr
  23 # CHECK-NEXT:   Type: SHT_PROGBITS
  24 # CHECK-NEXT:   Flags [
  25 # CHECK-NEXT:     SHF_ALLOC
  26 # CHECK-NEXT:   ]
  27 # CHECK-NEXT:   Address: 0x200158
  28 # CHECK-NEXT:   Offset: 0x158
  29 # CHECK-NEXT:   Size: 28
  30 # CHECK-NEXT:   Link: 0
  31 # CHECK-NEXT:   Info: 0
  32 # CHECK-NEXT:   AddressAlignment:
  33 # CHECK-NEXT:   EntrySize: 0
  34 # CHECK-NEXT:   SectionData (
  35 # CHECK-NEXT:     0000: 011B033B 1C000000 02000000 64100000
  36 ##                               ^        ^-- FDE(1) PC
  37 ##                               ^-- Number of FDEs
  38 # CHECK-NEXT:     0010: 38000000 66100000 4C000000
  39 ##                               ^-- FDE(2) PC
  40 # CHECK-NEXT:   )
  41 # CHECK-NEXT: }
  42 ## FDE(1) == 0x201000 - .eh_frame_hdr(0x200158) = 0xEA8
  43 ## FDE(2) == 0x201000 - .eh_frame_hdr(0x200158) + 2(relocation addend) = 0xEAA
  44
  45 ## Check .eh_frame contains CIE and two FDEs remaining after ICF.
  46 # CHECK-NEXT: Section {
  47 # CHECK-NEXT:   Index: 2
  48 # CHECK-NEXT:   Name: .eh_frame
  49 # CHECK-NEXT:   Type: SHT_PROGBITS
  50 # CHECK-NEXT:   Flags [
  51 # CHECK-NEXT:     SHF_ALLOC
  52 # CHECK-NEXT:   ]
  53 # CHECK-NEXT:   Address: 0x200178
  54 # CHECK-NEXT:   Offset: 0x178
  55 # CHECK-NEXT:   Size: 68
  56 # CHECK-NEXT:   Link: 0
  57 # CHECK-NEXT:   Info: 0
  58 # CHECK-NEXT:   AddressAlignment: 8
  59 # CHECK-NEXT:   EntrySize: 0
  60 # CHECK-NEXT:   SectionData (
  61 # CHECK-NEXT:     0000: 14000000 00000000 017A5200 01781001
  62 # CHECK-NEXT:     0010: 1B0C0708 90010000 10000000 1C000000
  63 # CHECK-NEXT:     0020: 24100000 01000000 00000000 10000000
  64 # CHECK-NEXT:     0030: 30000000 12100000 01000000 00000000
  65 # CHECK-NEXT:     0040: 00000000
  66 # CHECK-NEXT:   )
  67 # CHECK-NEXT: }
  68
  69 # CHECK:     Section {
  70 # CHECK:       Index:
  71 # CHECK:       Name: .text
  72 # CHECK-NEXT:  Type: SHT_PROGBITS
  73 # CHECK-NEXT:  Flags [
  74 # CHECK-NEXT:    SHF_ALLOC
  75 # CHECK-NEXT:    SHF_EXECINSTR
  76 # CHECK-NEXT:  ]
  77 # CHECK-NEXT:  Address: 0x2011BC
  78
  79 .section .text.f1, "ax"
  80 .cfi_startproc
  81 nop
  82 .cfi_endproc
  83 nop
  84 .cfi_startproc
  85 ret
  86 .cfi_endproc
  87
  88 .section .text.f2, "ax"
  89 .cfi_startproc
  90 nop
  91 .cfi_endproc
  92 nop
  93 .cfi_startproc
  94 ret
  95 .cfi_endproc