lld/test/ELF/gc-sections-shared.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/shared.s -o %t2.o
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/gc-sections-shared.s -o %t3.o
   4 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/gc-sections-shared2.s -o %t4.o
   5 # RUN: ld.lld -shared %t2.o -o %t2.so
   6 # RUN: ld.lld -shared %t3.o -o %t3.so
   7 # RUN: ld.lld -shared %t4.o -o %t4.so
   8 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o
   9 # RUN: ld.lld --gc-sections --export-dynamic-symbol foo -o %t %t.o --as-needed %t2.so %t3.so %t4.so
  10 # RUN: llvm-readelf -d --dyn-symbols %t | FileCheck %s
  11
  12 # This test the property that we have a needed line for every undefined.
  13 # It would also be OK to keep bar2 and the need for %t2.so
  14 # At the same time, weak symbols should not cause adding DT_NEEDED;
  15 # this case is checked with symbol qux and %t4.so.
  16
  17 # CHECK-NOT: NEEDED
  18 # CHECK:     (NEEDED) Shared library: [{{.*}}3.so]
  19 # CHECK-NOT: NEEDED
  20
  21 # CHECK-DAG: FUNC    WEAK   DEFAULT  UND qux
  22 # CHECK-DAG: NOTYPE  GLOBAL DEFAULT    6 bar
  23 # CHECK-DAG: FUNC    GLOBAL DEFAULT  UND baz
  24 # CHECK-DAG: NOTYPE  GLOBAL DEFAULT    6 foo
  25
  26 # Test with %t.o at the end too.
  27 # RUN: ld.lld --gc-sections --export-dynamic-symbol foo -o %t --as-needed %t2.so %t3.so %t4.so %t.o
  28 # RUN: llvm-readelf --dynamic-table --dyn-symbols %t | FileCheck --check-prefix=CHECK %s
  29
  30 .section .text.foo, "ax"
  31 .globl foo
  32 foo:
  33 .long bar - .
  34
  35 .section .text.bar, "ax"
  36 .globl bar
  37 bar:
  38 ret
  39
  40 .section .text._start, "ax"
  41 .globl _start
  42 .weak qux
  43 _start:
  44 .long baz - .
  45 .long qux - .
  46 ret
  47
  48 .section .text.unused, "ax"
  49 .long bar2 - .