lld/test/ELF/wrap-dynamic-undef.s

   1 # REQUIRES: x86
   2 # RUN: split-file %s %t
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64 %t/a.s -o %t/a.o
   4 # RUN: llvm-mc -filetype=obj -triple=x86_64 %t/def.s -o %t/def.o
   5 # RUN: ld.lld %t/def.o -o %t/def.so -shared --soname=def
   6 # RUN: ld.lld %t/a.o %t/def.so -o %t1 --wrap foo
   7 # RUN: llvm-readelf --dyn-syms %t1 | FileCheck %s
   8
   9 # Test that the dynamic relocation uses foo. We used to produce a
  10 # relocation with __real_foo.
  11
  12 # CHECK:      Symbol table '.dynsym' contains 2 entries:
  13 # CHECK:      NOTYPE  LOCAL  DEFAULT  UND
  14 # CHECK-NEXT: NOTYPE  GLOBAL DEFAULT  UND foo
  15
  16 # RUN: llvm-mc -filetype=obj -triple=x86_64 %t/b.s -o %t/b.o
  17 # RUN: ld.lld -shared --wrap foo %t/b.o -o %t2.so
  18 # RUN: llvm-readelf --dyn-syms %t2.so | FileCheck %s --check-prefix=SYM2
  19
  20 # SYM2:      Symbol table '.dynsym' contains 4 entries:
  21 # SYM2:      NOTYPE  LOCAL  DEFAULT   UND
  22 # SYM2-NEXT: NOTYPE  WEAK   DEFAULT   UND foo
  23 # SYM2-NEXT: NOTYPE  WEAK   DEFAULT   UND __wrap_foo
  24 # SYM2-NEXT: NOTYPE  GLOBAL DEFAULT [[#]] _start
  25
  26 #--- a.s
  27 .global _start
  28 _start:
  29         callq   __real_foo@plt
  30
  31 #--- def.s
  32 .globl foo
  33 foo:
  34
  35 #--- b.s
  36 .weak foo
  37 .weak __real_foo
  38 .global _start
  39 _start:
  40   call __real_foo@plt
  41   call foo@plt