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

   1 # REQUIRES: x86
   2 # RUN: rm -rf %t && split-file %s %t && cd %t
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64 a.s -o a.o
   4 # RUN: llvm-mc -filetype=obj -triple=x86_64 b.s -o b.o
   5 # RUN: ld.lld -shared -soname=b.so b.o -o b.so
   6
   7 # RUN: ld.lld a.o -o a
   8 # RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn a | FileCheck %s --check-prefix=DISASM
   9 # RUN: llvm-readelf -r -s a | FileCheck %s
  10
  11 # CHECK:      Relocation section '.rela.dyn' at offset {{.*}} contains 3 entries:
  12 # CHECK-NEXT:     Type
  13 # CHECK-NEXT: {{0*}}[[#%x,O:]] [[#%x,]] R_X86_64_IRELATIVE  [[#%x,QUX:]]
  14 # CHECK-NEXT: {{0*}}[[#O+8]]   [[#%x,]] R_X86_64_IRELATIVE
  15 # CHECK-NEXT: {{0*}}[[#O+16]]  [[#%x,]] R_X86_64_IRELATIVE
  16
  17 # CHECK:                      0 NOTYPE  LOCAL  HIDDEN     [[#]] __rela_iplt_start
  18 # CHECK-NEXT:                 0 NOTYPE  LOCAL  HIDDEN     [[#]] __rela_iplt_end
  19 # CHECK-NEXT: {{0*}}[[#QUX]]  0 IFUNC   GLOBAL DEFAULT    [[#]] qux
  20
  21 # RUN: ld.lld -pie a.o b.so -o a1
  22 # RUN: llvm-readelf -rs a1 | FileCheck %s --check-prefixes=PIC,PIE
  23 # RUN: ld.lld -shared a.o b.so -o a2
  24 # RUN: llvm-readelf -rs a2 | FileCheck %s --check-prefix=PIC
  25
  26 # PIC:      {{0*}}[[#%x,O:]] [[#%x,]] R_X86_64_RELATIVE
  27 # PIC-NEXT:                           R_X86_64_GLOB_DAT      0000000000000000 ext + 0
  28 # PIC-NEXT: {{0*}}[[#O-16]]  [[#%x,]] R_X86_64_64            0000000000000000 __rela_iplt_start + 0
  29 # PIC-NEXT: {{0*}}[[#O-8]]   [[#%x,]] R_X86_64_64            0000000000000000 __rela_iplt_end + 0
  30 # PIE-NEXT: {{0*}}[[#O+8]]   [[#%x,]] R_X86_64_IRELATIVE
  31 # PIE-NEXT: {{0*}}[[#O+16]]  [[#%x,]] R_X86_64_IRELATIVE
  32 # PIE-NEXT: {{0*}}[[#O+24]]  [[#%x,]] R_X86_64_IRELATIVE
  33
  34 # PIC:        0 NOTYPE  WEAK   DEFAULT    UND __rela_iplt_start
  35 # PIC-NEXT:   0 NOTYPE  WEAK   DEFAULT    UND __rela_iplt_end
  36
  37 # DISASM: Disassembly of section .text:
  38 # DISASM-EMPTY:
  39 # DISASM-NEXT: <qux>:
  40 # DISASM:      <foo>:
  41 # DISASM:      <bar>:
  42 # DISASM:      <unused>:
  43 # DISASM:      <_start>:
  44 # DISASM-NEXT:   callq 0x[[#%x,foo:]]
  45 # DISASM-NEXT:   callq 0x[[#%x,bar:]]
  46 # DISASM-NEXT:   callq 0x[[#%x,qux:]]
  47 # DISASM-EMPTY:
  48 # DISASM-NEXT: Disassembly of section .iplt:
  49 # DISASM-EMPTY:
  50 # DISASM-NEXT: <.iplt>:
  51 # DISASM-NEXT:  [[#qux]]: jmpq *{{.*}}(%rip)
  52 # DISASM-NEXT:            pushq $0
  53 # DISASM-NEXT:            jmp 0x0
  54 # DISASM-NEXT:  [[#foo]]: jmpq *{{.*}}(%rip)
  55 # DISASM-NEXT:            pushq $1
  56 # DISASM-NEXT:            jmp 0x0
  57 # DISASM-NEXT:  [[#bar]]: jmpq *{{.*}}(%rip)
  58 # DISASM-NEXT:            pushq $2
  59 # DISASM-NEXT:            jmp 0x0
  60
  61 #--- a.s
  62 .globl qux, foo, bar
  63 .type qux, @gnu_indirect_function
  64 .type foo STT_GNU_IFUNC
  65 .type bar STT_GNU_IFUNC
  66 qux: ret
  67 foo: ret
  68 bar: ret
  69
  70 .type unused, @gnu_indirect_function
  71 .globl unused
  72 .weak ext
  73 unused: mov ext@gotpcrel(%rip), %rax
  74
  75 .weak __rela_iplt_start
  76 .weak __rela_iplt_end
  77
  78 .globl _start
  79 _start:
  80  call foo
  81  call bar
  82  call qux
  83
  84 .data
  85   .quad __rela_iplt_start
  86   .quad __rela_iplt_end
  87   .quad .data
  88
  89 #--- b.s
  90 .globl ext
  91 ext:
  92   ret