lld/test/ELF/init-fini.s

   1 // REQUIRES: x86
   2 // RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
   3
   4 // Should use "_init" and "_fini" by default when fills dynamic table
   5 // RUN: ld.lld -shared %t -o %t2
   6 // RUN: llvm-readobj --dynamic-table %t2 | FileCheck --check-prefix=BYDEF %s
   7 // BYDEF: INIT 0x11010
   8 // BYDEF: FINI 0x11020
   9
  10 // -init and -fini override symbols to use
  11 // RUN: ld.lld -shared %t -o %t2 -init _foo -fini _bar
  12 // RUN: llvm-readobj --dynamic-table %t2 | FileCheck --check-prefix=OVR %s
  13 // OVR: INIT 0x11030
  14 // OVR: FINI 0x11040
  15
  16 // Check aliases as well
  17 // RUN: ld.lld -shared %t -o %t2 -init=_foo -fini=_bar
  18 // RUN: llvm-readobj --dynamic-table %t2 | FileCheck --check-prefix=OVR %s
  19
  20 // Don't add an entry for undef. The freebsd dynamic linker doesn't
  21 // check if the value is null. If it is, it will just call the
  22 // load address.
  23 // RUN: ld.lld -shared %t -o %t2 -init=_undef -fini=_undef
  24 // RUN: llvm-readobj --dynamic-table %t2 | FileCheck --check-prefix=UNDEF %s
  25 // UNDEF-NOT: INIT
  26 // UNDEF-NOT: FINI
  27
  28 // Don't add an entry for shared. For the same reason as undef.
  29 // RUN: ld.lld -shared %t -o %t.so
  30 // RUN: echo > %t.s
  31 // RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %t.s -o %t2.o
  32 // RUN: ld.lld -shared %t2.o %t.so -o %t2
  33 // RUN: llvm-readobj --dynamic-table %t2 | FileCheck --check-prefix=SHARED %s
  34 // SHARED-NOT: INIT
  35 // SHARED-NOT: FINI
  36
  37 // Should not add new entries to the symbol table
  38 // and should not require given symbols to be resolved
  39 // RUN: ld.lld -shared %t -o %t2 -init=_unknown -fini=_unknown
  40 // RUN: llvm-readobj --symbols --dynamic-table %t2 | FileCheck --check-prefix=NOENTRY %s
  41 // NOENTRY: DynamicSection [
  42 // NOENTRY-NOT: INIT
  43 // NOENTRY-NOT: FINI
  44 // NOENTRY: ]
  45 // NOENTRY: Symbols [
  46 // NOENTRY-NOT: Name: _unknown
  47 // NOENTRY: ]
  48
  49 // Should not add entries for "_init" and "_fini" to the symbol table
  50 // if the symbols are defined in non-fetched archive members.
  51 // RUN: rm -f %t.a
  52 // RUN: llvm-ar rcs %t.a %t
  53 // RUN: ld.lld -shared -m elf_x86_64 -e _unknown %t.a -o %t.so
  54 // RUN: llvm-nm %t.so | \
  55 // RUN:   FileCheck %s --implicit-check-not=_init --implicit-check-not=_fini
  56
  57 .global _start,_init,_fini,_foo,_bar,_undef
  58 _start:
  59 _init = 0x11010
  60 _fini = 0x11020
  61 _foo  = 0x11030
  62 _bar  = 0x11040