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

   1 // REQUIRES: x86
   2
   3 /// For non-preemptable ifunc, place ifunc PLT entries after regular PLT entries.
   4
   5 // RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o
   6 // RUN: ld.lld --shared -o %t.so %t.o
   7 // RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t.so | FileCheck %s --check-prefix=DISASM
   8 // RUN: llvm-readobj -r %t.so | FileCheck %s
   9
  10 // Check that an IRELATIVE relocation is used for a non-preemptible ifunc
  11 // handler and a JUMP_SLOT is used for a preemptible ifunc
  12 // DISASM: Disassembly of section .text:
  13 // DISASM-EMPTY:
  14 // DISASM-NEXT: <fct>:
  15 // DISASM-NEXT:     1308:       retq
  16 // DISASM:     <fct2>:
  17 // DISASM-NEXT:     1309:       retq
  18 // DISASM:     <f1>:
  19 // DISASM-NEXT:     130a:       callq   0x1350
  20 // DISASM-NEXT:     130f:       callq   0x1330
  21 // DISASM-NEXT:     1314:       callq   0x1340
  22 // DISASM-NEXT:     1319:       retq
  23 // DISASM:     <f2>:
  24 // DISASM-NEXT:     131a:       retq
  25 // DISASM-EMPTY:
  26 // DISASM-NEXT: Disassembly of section .plt:
  27 // DISASM-EMPTY:
  28 // DISASM-NEXT: <.plt>:
  29 // DISASM-NEXT:     1320:       pushq   8482(%rip)
  30 // DISASM-NEXT:     1326:       jmpq    *8484(%rip)
  31 // DISASM-NEXT:     132c:       nopl    (%rax)
  32 // DISASM-EMPTY:
  33 // DISASM-NEXT:   <fct2@plt>:
  34 // DISASM-NEXT:     1330:       jmpq    *8482(%rip)
  35 // DISASM-NEXT:     1336:       pushq   $0
  36 // DISASM-NEXT:     133b:       jmp     0x1320 <.plt>
  37 // DISASM-EMPTY:
  38 // DISASM-NEXT:   <f2@plt>:
  39 // DISASM-NEXT:     1340:       jmpq    *8474(%rip)
  40 // DISASM-NEXT:     1346:       pushq   $1
  41 // DISASM-NEXT:     134b:       jmp     0x1320 <.plt>
  42 // DISASM:      Disassembly of section .iplt:
  43 // DISASM-EMPTY:
  44 // DISASM:      <.iplt>:
  45 // DISASM-NEXT:     1350:       jmpq    *8466(%rip)
  46 // DISASM-NEXT:     1356:       pushq   $0
  47 // DISASM-NEXT:     135b:       jmp     0x1320 <.plt>
  48
  49 // CHECK: Relocations [
  50 // CHECK-NEXT:   Section (5) .rela.dyn {
  51 // CHECK-NEXT:     0x3468 R_X86_64_IRELATIVE - 0x1308
  52 // CHECK-NEXT:   }
  53 // CHECK-NEXT:   Section (6) .rela.plt {
  54 // CHECK-NEXT:     0x3458 R_X86_64_JUMP_SLOT fct2 0x0
  55 // CHECK-NEXT:     0x3460 R_X86_64_JUMP_SLOT f2 0x0
  56 // CHECK-NEXT:   }
  57
  58  // Hidden expect IRELATIVE
  59  .globl fct
  60  .hidden fct
  61  .type  fct, STT_GNU_IFUNC
  62 fct:
  63  ret
  64
  65  // Not hidden expect JUMP_SLOT
  66  .globl fct2
  67  .type  fct2, STT_GNU_IFUNC
  68 fct2:
  69  ret
  70
  71  .globl f1
  72  .type f1, @function
  73 f1:
  74  call fct
  75  call fct2
  76  call f2@PLT
  77  ret
  78
  79  .globl f2
  80  .type f2, @function
  81 f2:
  82  ret