lld/test/MachO/weak-private-extern.s

   1 # REQUIRES: x86
   2
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos %s -o %t.o
   4 # RUN: %lld -dylib %t.o -o %t.dylib -lSystem
   5
   6 # RUN: llvm-objdump --macho --bind --weak-bind %t.dylib | FileCheck %s
   7 # CHECK-NOT: __got
   8 # CHECK-NOT: __la_symbol_ptr
   9
  10 # RUN: llvm-objdump --macho --private-header %t.dylib | \
  11 # RUN:     FileCheck --check-prefix=HEADERS %s
  12 # HEADERS-NOT: WEAK_DEFINES
  13 # HEADERS-NOT: BINDS_TO_WEAK
  14
  15 ## Check that N_WEAK_DEF isn't set in the symbol table.
  16 ## This is different from ld64, which makes private extern weak symbols non-weak
  17 ## for binds and relocations, but it still marks them as weak in the symbol table.
  18 ## Since `nm -m` doesn't look at N_WEAK_DEF for N_PEXT symbols this is not
  19 ## observable via nm, but it feels slightly more correct.
  20 ## (It is observable in `llvm-objdump --syms` output.)
  21 # RUN: llvm-readobj --syms %t.dylib | FileCheck --check-prefix=SYMS %s
  22 # SYMS-NOT: WeakDef (0x80)
  23
  24 .globl _use
  25 _use:
  26   mov _weak_private_extern_gotpcrel@GOTPCREL(%rip), %rax
  27   callq _weak_private_extern
  28   retq
  29
  30 .private_extern _weak_private_extern
  31 .globl _weak_private_extern
  32 .weak_definition _weak_private_extern
  33 _weak_private_extern:
  34   retq
  35
  36 .private_extern _weak_private_extern_gotpcrel
  37 .globl _weak_private_extern_gotpcrel
  38 .weak_definition _weak_private_extern_gotpcrel
  39 _weak_private_extern_gotpcrel:
  40   .quad 0x1234