lld/test/ELF/gnu-ifunc-nonpreemptible.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o
   3 # RUN: ld.lld %t.o -o %t
   4 # RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t | FileCheck %s --check-prefix=DISASM
   5 # RUN: llvm-readelf -r -s %t | FileCheck %s
   6
   7 # RUN: ld.lld --export-dynamic %t.o -o %t
   8 # RUN: llvm-readelf -r -s %t | FileCheck %s
   9
  10 # CHECK:      Relocation section '.rela.dyn' at offset {{.*}} contains 2 entries:
  11 # CHECK-NEXT:     Type
  12 # CHECK-NEXT: R_X86_64_IRELATIVE
  13 # CHECK-NEXT: R_X86_64_IRELATIVE
  14
  15 # CHECK:      0 NOTYPE  LOCAL  HIDDEN     [[#]] __rela_iplt_start
  16 # CHECK-NEXT: 0 NOTYPE  LOCAL  HIDDEN     [[#]] __rela_iplt_end
  17
  18 # RUN: ld.lld -pie %t.o -o %t1
  19 # RUN: llvm-readelf -s %t1 | FileCheck %s --check-prefix=PIC
  20 # RUN: ld.lld -shared %t.o -o %t2
  21 # RUN: llvm-readelf -s %t2 | FileCheck %s --check-prefix=PIC
  22
  23 # PIC:        0 NOTYPE  WEAK   DEFAULT    UND __rela_iplt_start
  24 # PIC-NEXT:   0 NOTYPE  WEAK   DEFAULT    UND __rela_iplt_end
  25
  26 # DISASM: Disassembly of section .text:
  27 # DISASM-EMPTY:
  28 # DISASM-NEXT: <foo>:
  29 # DISASM:      <bar>:
  30 # DISASM:      <unused>:
  31 # DISASM:      <_start>:
  32 # DISASM-NEXT:   callq 0x[[#%x,foo:]]
  33 # DISASM-NEXT:   callq 0x[[#%x,bar:]]
  34 # DISASM-EMPTY:
  35 # DISASM-NEXT: Disassembly of section .iplt:
  36 # DISASM-EMPTY:
  37 # DISASM-NEXT: <.iplt>:
  38 # DISASM-NEXT:  [[#foo]]: jmpq *{{.*}}(%rip)
  39 # DISASM-NEXT:            pushq $0
  40 # DISASM-NEXT:            jmp 0x0
  41 # DISASM-NEXT:  [[#bar]]: jmpq *{{.*}}(%rip)
  42 # DISASM-NEXT:            pushq $1
  43 # DISASM-NEXT:            jmp 0x0
  44
  45 .text
  46 .type foo STT_GNU_IFUNC
  47 .globl foo
  48 foo:
  49  ret
  50
  51 .type bar STT_GNU_IFUNC
  52 .globl bar
  53 bar:
  54  ret
  55
  56 .type unused, @gnu_indirect_function
  57 .globl unused
  58 unused:
  59   ret
  60
  61 .weak __rela_iplt_start
  62 .weak __rela_iplt_end
  63
  64 .globl _start
  65 _start:
  66  call foo
  67  call bar
  68
  69 .data
  70   .quad __rela_iplt_start
  71   .quad __rela_iplt_end