lld/test/COFF/entry-weak-external.s

   1 # REQUIRES: x86
   2 # RUN: rm -rf %t && split-file %s %t
   3
   4 ## Ensure that we resolve the entry point to the unmangled weak alias instead of
   5 ## the mangled library definition (which would fail with an undefined symbol).
   6
   7 # RUN: llvm-mc -triple x86_64-windows-msvc -filetype obj -o %t/entry-weak.obj %t/entry-weak.s
   8 # RUN: llvm-mc -triple x86_64-windows-msvc -filetype obj -o %t/entry-mangled.obj %t/entry-mangled.s
   9 # RUN: llvm-lib -out:%t/entry-mangled.lib %t/entry-mangled.obj
  10 # RUN: lld-link -subsystem:console -entry:entry -out:%t/entry-weak-external.exe %t/entry-weak.obj %t/entry-mangled.lib
  11 # RUN: llvm-readobj --file-headers %t/entry-weak-external.exe | FileCheck %s
  12
  13 ## Ensure that we don't resolve the entry point to a weak alias pointing to an
  14 ## undefined symbol (which would have caused the entry point to be 0 instead of
  15 ## an actual address). I can't think of a way of triggering this edge case
  16 ## without using /force:unresolved, which means it likely doesn't matter in
  17 ## practice, but we still match link.exe's behavior for it.
  18
  19 # RUN: llvm-mc -triple x86_64-windows-msvc -filetype obj -o %t/entry-weak-undefined.obj %t/entry-weak-undefined.s
  20 # RUN: lld-link -subsystem:console -entry:entry -force:unresolved -out:%t/entry-undefined-weak-external.exe \
  21 # RUN:   %t/entry-weak-undefined.obj %t/entry-mangled.lib
  22 # RUN: llvm-readobj --file-headers %t/entry-undefined-weak-external.exe | FileCheck %s
  23
  24 # CHECK: AddressOfEntryPoint: 0x1000
  25
  26 #--- entry-weak.s
  27 .globl default_entry
  28 default_entry:
  29         ret
  30
  31 .weak entry
  32 entry = default_entry
  33
  34 #--- entry-mangled.s
  35 .globl "?entry@@YAHXZ"
  36 "?entry@@YAHXZ":
  37         jmp     does_not_exist
  38
  39 #--- entry-weak-undefined.s
  40 .weak entry
  41 entry = does_not_exist