lld/test/ELF/wrap-shlib-undefined.s

   1 # REQUIRES: x86
   2
   3 # RUN: rm -rf %t && split-file %s %t
   4 # RUN: llvm-mc -filetype=obj -triple=x86_64 %t/main.s -o %t/main.o
   5 # RUN: llvm-mc -filetype=obj -triple=x86_64 %t/call-foo.s -o %t/call-foo.o
   6 # RUN: llvm-mc -filetype=obj -triple=x86_64 %t/bar.s -o %t/bar.o
   7 # RUN: ld.lld -shared -soname=t.so %t/bar.o -o %t/bar.so
   8 # RUN: llvm-mc -filetype=obj -triple=x86_64 %t/wrap.s -o %t/wrap.o
   9 # RUN: ld.lld -shared --soname=fixed %t/wrap.o -o %t/wrap.so
  10
  11 ## foo is defined, then referenced in another object file.
  12 # RUN: ld.lld -shared %t/main.o %t/call-foo.o --wrap foo -o %t1.so
  13 # RUN: llvm-readelf -r %t1.so | FileCheck %s --check-prefix=CHECK1
  14
  15 # CHECK1:      R_X86_64_JUMP_SLOT 0000000000000000 bar + 0
  16 # CHECK1-NEXT: R_X86_64_JUMP_SLOT 0000000000000000 __wrap_foo + 0
  17
  18 ## --no-allow-shlib-undefined errors because __real_foo is not defined.
  19 # RUN: not ld.lld %t/main.o %t/bar.so -o /dev/null 2>&1 | FileCheck --check-prefix=ERR %s
  20 # ERR: error: undefined reference due to --no-allow-shlib-undefined: __real_foo
  21
  22 ## --wrap=foo defines __real_foo.
  23 # RUN: ld.lld %t/main.o %t/bar.so --wrap=foo -o %t2
  24 # RUN: llvm-readelf --dyn-syms %t2 | FileCheck %s --check-prefix=CHECK2
  25
  26 ## See wrap-plt2.s why __wrap_foo is retained.
  27 # CHECK2:      Symbol table '.dynsym' contains 3 entries:
  28 # CHECK2:      NOTYPE  LOCAL  DEFAULT  UND
  29 # CHECK2-NEXT: NOTYPE  GLOBAL DEFAULT  UND bar
  30 # CHECK2-NEXT: NOTYPE  GLOBAL DEFAULT  UND __wrap_foo
  31
  32 ## __wrap_bar is undefined.
  33 # RUN: ld.lld -shared %t/main.o --wrap=bar -o %t3.so
  34 # RUN: llvm-readelf -r --dyn-syms %t3.so | FileCheck %s --check-prefix=CHECK3
  35 # CHECK3:      R_X86_64_JUMP_SLOT 0000000000000000 __wrap_bar + 0
  36 # CHECK3:      Symbol table '.dynsym' contains 4 entries:
  37 # CHECK3:      NOTYPE  LOCAL  DEFAULT  UND
  38 # CHECK3-NEXT: NOTYPE  GLOBAL DEFAULT  UND __wrap_bar
  39 # CHECK3-NEXT: NOTYPE  GLOBAL DEFAULT    6 _start
  40 # CHECK3-NEXT: NOTYPE  GLOBAL DEFAULT    6 foo
  41
  42 ## __wrap_bar is defined in %t/wrap.so.
  43 # RUN: ld.lld -shared %t/main.o %t/wrap.so --wrap=bar -o %t4.so
  44 # RUN: llvm-readelf -r --dyn-syms %t4.so | FileCheck %s --check-prefix=CHECK4
  45 # CHECK4:      R_X86_64_JUMP_SLOT {{.*}} __wrap_bar + 0
  46 # CHECK4:      Symbol table '.dynsym' contains 4 entries:
  47 # CHECK4:      NOTYPE  LOCAL  DEFAULT  UND
  48 # CHECK4-NEXT: NOTYPE  GLOBAL DEFAULT  UND __wrap_bar
  49 # CHECK4-NEXT: NOTYPE  GLOBAL DEFAULT    6 _start
  50 # CHECK4-NEXT: NOTYPE  GLOBAL DEFAULT    6 foo
  51
  52 # RUN: ld.lld %t/main.o %t/wrap.so --wrap bar -o %t1
  53 # RUN: llvm-readelf --dyn-syms %t1 | FileCheck %s --check-prefix=DYNSYM
  54 # RUN: llvm-objdump -d %t1 | FileCheck %s --check-prefix=ASM
  55
  56 # DYNSYM:      Symbol table '.dynsym' contains 2 entries:
  57 # DYNSYM:      NOTYPE  LOCAL  DEFAULT  UND
  58 # DYNSYM-NEXT: NOTYPE  GLOBAL DEFAULT  UND __wrap_bar
  59
  60 # ASM:      <_start>:
  61 # ASM-NEXT:   callq {{.*}} <__wrap_bar@plt>
  62
  63 #--- main.s
  64 .globl _start, foo
  65 _start:
  66   call bar
  67 foo:
  68
  69 #--- call-foo.s
  70   call foo
  71
  72 #--- bar.s
  73 .globl bar
  74 bar:
  75   call __real_foo
  76
  77 #--- wrap.s
  78 .globl __wrap_bar
  79 __wrap_bar:
  80   retq