lld/test/COFF/safeseh.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -triple i686-windows-msvc %s -filetype=obj -o %t.obj
   3 # RUN: lld-link %t.obj -safeseh -out:%t.exe -opt:noref -entry:main
   4 # RUN: llvm-readobj --coff-basereloc --coff-load-config --file-headers %t.exe | FileCheck %s --check-prefix=CHECK-NOGC
   5 # RUN: lld-link %t.obj -safeseh -out:%t.exe -opt:noref -entry:main -debug:dwarf
   6 # RUN: llvm-readobj --coff-basereloc --coff-load-config --file-headers %t.exe | FileCheck %s --check-prefix=CHECK-NOGC
   7 # RUN: lld-link %t.obj -safeseh -out:%t.exe -opt:ref -entry:main
   8 # RUN: llvm-readobj --coff-basereloc --coff-load-config --file-headers %t.exe | FileCheck %s --check-prefix=CHECK-GC
   9
  10 # __safe_se_handler_table needs to be relocated against ImageBase.
  11 # check that the relocation is present.
  12 #
  13 # CHECK-NOGC-NOT: IMAGE_DLL_CHARACTERISTICS_NO_SEH
  14 # CHECK-NOGC: BaseReloc [
  15 # CHECK-NOGC:   Entry {
  16 # CHECK-NOGC:     Type: HIGHLOW
  17 # CHECK-NOGC: LoadConfig [
  18 # CHECK-NOGC:   Size: 0x48
  19 # CHECK-NOGC:   SEHandlerTable: 0x
  20 # CHECK-NOGC:   SEHandlerCount: 1
  21 # CHECK-NOGC: ]
  22 # CHECK-NOGC: SEHTable [
  23 # CHECK-NOGC-NEXT:   0x401006
  24 # CHECK-NOGC-NEXT: ]
  25
  26 # If we enable GC, the exception handler should be removed, and we should add
  27 # the DLL characteristic flag that indicates that there are no exception
  28 # handlers in this DLL. The exception handler table in the load config should
  29 # be empty and there should be no relocations for it.
  30 #
  31 # CHECK-GC: Characteristics [
  32 # CHECK-GC:   IMAGE_DLL_CHARACTERISTICS_NO_SEH
  33 # CHECK-GC: ]
  34 # CHECK-GC: BaseReloc [
  35 # CHECK-GC-NEXT: ]
  36 # CHECK-GC: LoadConfig [
  37 # CHECK-GC:   Size: 0x48
  38 # CHECK-GC:   SEHandlerTable: 0x0
  39 # CHECK-GC:   SEHandlerCount: 0
  40 # CHECK-GC: ]
  41 # CHECK-GC-NOT: SEHTable
  42
  43
  44         .def     @feat.00;
  45         .scl    3;
  46         .type   0;
  47         .endef
  48         .globl  @feat.00
  49 @feat.00 = 1
  50
  51         .def     _main;
  52         .scl    2;
  53         .type   32;
  54         .endef
  55         .section        .text,"xr",one_only,_main
  56         .globl  _main
  57 _main:
  58         movl $42, %eax
  59         ret
  60
  61 # This handler can be GCd, which will make the safeseh table empty, so it should
  62 # appear null.
  63         .def     _my_handler;
  64         .scl    3;
  65         .type   32;
  66         .endef
  67         .section        .text,"xr",one_only,_my_handler
  68 _my_handler:
  69         ret
  70
  71 .safeseh _my_handler
  72
  73
  74         .section .rdata,"dr"
  75 .globl __load_config_used
  76 __load_config_used:
  77         .long 72
  78         .fill 60, 1, 0
  79         .long ___safe_se_handler_table
  80         .long ___safe_se_handler_count