bolt/test/X86/orc_unwind.s

   1 # REQUIRES: system-linux
   2
   3 ## Check that BOLT correctly reads ORC unwind information used by Linux Kernel.
   4
   5 # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o
   6 # RUN: %clang %cflags %t.o -o %t.exe
   7
   8 # RUN: llvm-bolt %t.exe --print-normalized --dump-orc --print-orc -o %t.out \
   9 # RUN:   |& FileCheck %s
  10
  11 # CHECK:                        BOLT-INFO: ORC unwind information:
  12 # CHECK-NEXT: {sp: 8, bp: 0, info: 0x5}: _start
  13 # CHECK-NEXT: {sp: 0, bp: 0, info: 0x0}: _start
  14 # CHECK-NEXT: {sp: 8, bp: 0, info: 0x5}: foo
  15 # CHECK-NEXT: {sp: 16, bp: -16, info: 0x15}: foo
  16 # CHECK-NEXT: {sp: 16, bp: -16, info: 0x14}: foo
  17 # CHECK-NEXT: {sp: 8, bp: 0, info: 0x5}: foo
  18 # CHECK-NEXT: {sp: 0, bp: 0, info: 0x0}: bar
  19
  20   .text
  21   .globl _start
  22   .type _start, %function
  23 _start:
  24   .cfi_startproc
  25
  26   call foo
  27 # CHECK:      callq foo           # ORC: {sp: 8, bp: 0, info: 0x5}
  28   ret
  29   .cfi_endproc
  30   .size _start, .-_start
  31
  32   .globl foo
  33   .type foo, %function
  34 foo:
  35   .cfi_startproc
  36   push %rbp
  37 # CHECK:      pushq   %rbp        # ORC: {sp: 8, bp: 0, info: 0x5}
  38 .L1:
  39   mov %rsp, %rbp
  40 # CHECK:      movq    %rsp, %rbp  # ORC: {sp: 16, bp: -16, info: 0x15}
  41 .L2:
  42   pop %rbp
  43 # CHECK:      popq    %rbp        # ORC: {sp: 16, bp: -16, info: 0x14}
  44 .L3:
  45   ret
  46 # CHECK:      retq                # ORC: {sp: 8, bp: 0, info: 0x5}
  47   .cfi_endproc
  48   .size foo, .-foo
  49
  50 bar:
  51   .cfi_startproc
  52         ret
  53 # Same ORC info propagated from foo above.
  54 # CHECK:      retq                # ORC: {sp: 8, bp: 0, info: 0x5}
  55 .L4:
  56   .cfi_endproc
  57   .size bar, .-bar
  58
  59   .section .orc_unwind,"a",@progbits
  60   .align 4
  61   .section .orc_unwind_ip,"a",@progbits
  62   .align 4
  63
  64 # ORC for _start
  65   .section .orc_unwind
  66   .2byte 8
  67   .2byte 0
  68   .2byte 5
  69   .section .orc_unwind_ip
  70   .long _start - .
  71
  72   .section .orc_unwind
  73   .2byte 0
  74   .2byte 0
  75   .2byte 0
  76   .section .orc_unwind_ip
  77   .long foo - .
  78
  79 # ORC for foo
  80   .section .orc_unwind
  81   .2byte 8
  82   .2byte 0
  83   .2byte 5
  84   .section .orc_unwind_ip
  85   .long foo - .
  86
  87   .section .orc_unwind
  88   .2byte 16
  89   .2byte -16
  90   .2byte 21
  91   .section .orc_unwind_ip
  92   .long .L1 - .
  93
  94   .section .orc_unwind
  95   .2byte 16
  96   .2byte -16
  97   .2byte 20
  98   .section .orc_unwind_ip
  99   .long .L2 - .
 100
 101   .section .orc_unwind
 102   .2byte 8
 103   .2byte 0
 104   .2byte 5
 105   .section .orc_unwind_ip
 106   .long .L3 - .
 107
 108   .section .orc_unwind
 109   .2byte 0
 110   .2byte 0
 111   .2byte 0
 112   .section .orc_unwind_ip
 113   .long .L4 - .
 114
 115 # Fake Linux Kernel sections
 116   .section __ksymtab,"a",@progbits
 117   .section __ksymtab_gpl,"a",@progbits
 118   .section .pci_fixup,"a",@progbits