lld/test/ELF/weak-undef-shared.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o
   3 # RUN: ld.lld -shared %t.o -o %t.so
   4
   5 # RUN: echo '.data; .weak foo; .quad foo' | llvm-mc -filetype=obj -triple=x86_64 - -o %t1.o
   6 # RUN: echo '.data; .quad foo' | llvm-mc -filetype=obj -triple=x86_64 - -o %t2.o
   7 # RUN: ld.lld -shared %t2.o -o %t2.so
   8
   9 ## If the first undefined reference is weak, the binding changes to
  10 ## STB_WEAK.
  11 # RUN: ld.lld %t1.o %t.so -o %t
  12 # RUN: llvm-readelf --dyn-syms %t | FileCheck --check-prefix=WEAK %s
  13 # RUN: ld.lld %t.so %t1.o -o %t
  14 # RUN: llvm-readelf --dyn-syms %t | FileCheck --check-prefix=WEAK %s
  15
  16 ## The binding remains STB_WEAK if there is no STB_GLOBAL undefined reference.
  17 # RUN: ld.lld %t1.o %t.so %t1.o -o %t
  18 # RUN: llvm-readelf --dyn-syms %t | FileCheck --check-prefix=WEAK %s
  19 # RUN: ld.lld %t.so %t1.o %t1.o -o %t
  20 # RUN: llvm-readelf --dyn-syms %t | FileCheck --check-prefix=WEAK %s
  21
  22 ## The binding changes back to STB_GLOBAL if there is a STB_GLOBAL undefined reference.
  23 # RUN: ld.lld %t1.o %t.so %t2.o -o %t
  24 # RUN: llvm-readelf --dyn-syms %t | FileCheck --check-prefix=GLOBAL %s
  25 # RUN: ld.lld %t2.o %t.so %t1.o -o %t
  26 # RUN: llvm-readelf --dyn-syms %t | FileCheck --check-prefix=GLOBAL %s
  27
  28 ## Check the binding (weak) is not affected by the STB_GLOBAL undefined
  29 ## reference in %t2.so
  30 # RUN: ld.lld %t1.o %t2.so -o %t
  31 # RUN: llvm-readelf --dyn-syms %t | FileCheck --check-prefix=WEAK %s
  32
  33 # RUN: ld.lld %t2.so %t1.o -o %t
  34 # RUN: llvm-readelf --dyn-syms %t | FileCheck --check-prefix=WEAK %s
  35
  36 # WEAK:   NOTYPE WEAK   DEFAULT UND foo
  37 # GLOBAL: NOTYPE GLOBAL DEFAULT UND foo
  38
  39 .globl foo
  40 foo: