lld/test/COFF/link-dll-i386.s

   1 # REQUIRES: x86
   2
   3 ## Test creating a DLL and linking against the DLL without using an import
   4 ## library.
   5
   6 ## Test on i386 with cdecl decorated symbols.
   7
   8 ## Linking the executable with -opt:noref, to make sure that we don't
   9 ## pull in more import entries than what's needed, even if not running GC.
  10
  11 # RUN: split-file %s %t.dir
  12
  13 # RUN: llvm-mc -filetype=obj -triple=i386-windows-gnu %t.dir/lib.s -o %t.lib.o
  14 # RUN: lld-link -safeseh:no -noentry -dll -def:%t.dir/lib.def %t.lib.o -out:%t.lib.dll -implib:%t.implib.lib
  15 # RUN: llvm-mc -filetype=obj -triple=i386-windows-gnu %t.dir/main.s -o %t.main.o
  16 # RUN: lld-link -lldmingw %t.main.o -out:%t.main.exe %t.lib.dll -opt:noref -verbose 2>&1 | FileCheck --check-prefix=LOG %s
  17 # RUN: llvm-readobj --coff-imports %t.main.exe | FileCheck %s
  18
  19 #--- lib.s
  20 .text
  21 .global _func1
  22 _func1:
  23   ret
  24 .global _func2
  25 _func2:
  26   ret
  27 .global _func3
  28 _func3:
  29   ret
  30 .data
  31 .global _variable
  32 _variable:
  33   .int 42
  34
  35 #--- lib.def
  36 EXPORTS
  37 func1
  38 func2
  39 func3
  40 variable
  41
  42 #--- main.s
  43 .text
  44 .global _mainCRTStartup
  45 _mainCRTStartup:
  46   call _func2
  47   movl .refptr._variable, %eax
  48   movl (%eax), %eax
  49   ret
  50
  51 .section .rdata$.refptr._variable,"dr",discard,.refptr._variable
  52 .globl .refptr._variable
  53 .refptr._variable:
  54   .long _variable
  55
  56 # CHECK:      Import {
  57 # CHECK-NEXT:   Name: link-dll-i386.s.tmp.lib.dll
  58 # CHECK-NEXT:   ImportLookupTableRVA:
  59 # CHECK-NEXT:   ImportAddressTableRVA
  60 # CHECK-NEXT:   Symbol: func2
  61 # CHECK-NEXT:   Symbol: variable
  62 # CHECK-NEXT: }
  63
  64 # LOG: Automatically importing _variable from link-dll-i386.s.tmp.lib.dll