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

   1 // REQUIRES: x86
   2
   3 /// Test -z ifunc-noplt.
   4
   5 // RUN: llvm-mc -filetype=obj -triple=x86_64-pc-freebsd %S/Inputs/shared2-x86-64.s -o %t1.o
   6 // RUN: ld.lld %t1.o --shared -soname=so -o %t.so
   7 // RUN: llvm-mc -filetype=obj -triple=x86_64-pc-freebsd %s -o %t.o
   8
   9 /// The default -z text is not compatible with -z ifunc-noplt.
  10 // RUN: not ld.lld -z ifunc-noplt %t.o -o /dev/null 2>&1| FileCheck --check-prefix=INCOMPATIBLE %s
  11 // RUN: not ld.lld -z ifunc-noplt -z text %t.o -o /dev/null 2>&1| FileCheck --check-prefix=INCOMPATIBLE %s
  12 // INCOMPATIBLE: -z text and -z ifunc-noplt may not be used together
  13
  14 // RUN: ld.lld -z ifunc-noplt -z notext --hash-style=sysv %t.so %t.o -o %tout
  15 // RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %tout | FileCheck %s --check-prefix=DISASM
  16 // RUN: llvm-readobj -r --dynamic-table %tout | FileCheck %s
  17
  18 // Check that we emitted relocations for the ifunc calls
  19 // CHECK: Relocations [
  20 // CHECK-NEXT:   Section (4) .rela.dyn {
  21 // CHECK-NEXT:     0x201323 R_X86_64_PLT32 foo 0xFFFFFFFFFFFFFFFC
  22 // CHECK-NEXT:     0x201328 R_X86_64_PLT32 bar 0xFFFFFFFFFFFFFFFC
  23 // CHECK-NEXT:   }
  24 // CHECK-NEXT:   Section (5) .rela.plt {
  25 // CHECK-NEXT:     0x203498 R_X86_64_JUMP_SLOT bar2 0x0
  26 // CHECK-NEXT:     0x2034A0 R_X86_64_JUMP_SLOT zed2 0x0
  27 // CHECK-NEXT:   }
  28
  29 // Check that ifunc call sites still require relocation
  30 // DISASM: Disassembly of section .text:
  31 // DISASM-EMPTY:
  32 // DISASM-NEXT: 0000000000201320 <foo>:
  33 // DISASM-NEXT:   201320:       retq
  34 // DISASM-EMPTY:
  35 // DISASM-NEXT: 0000000000201321 <bar>:
  36 // DISASM-NEXT:   201321:       retq
  37 // DISASM-EMPTY:
  38 // DISASM-NEXT: 0000000000201322 <_start>:
  39 // DISASM-NEXT:   201322:       callq   0x201327 <_start+0x5>
  40 // DISASM-NEXT:   201327:       callq   0x20132c <_start+0xa>
  41 // DISASM-NEXT:   20132c:       callq   0x201350 <bar2@plt>
  42 // DISASM-NEXT:   201331:       callq   0x201360 <zed2@plt>
  43 // DISASM-EMPTY:
  44 // DISASM-NEXT: Disassembly of section .plt:
  45 // DISASM-EMPTY:
  46 // DISASM-NEXT: 0000000000201340 <.plt>:
  47 // DISASM-NEXT:   201340:       pushq   8514(%rip)
  48 // DISASM-NEXT:   201346:       jmpq    *8516(%rip)
  49 // DISASM-NEXT:   20134c:       nopl    (%rax)
  50 // DISASM-EMPTY:
  51 // DISASM-NEXT: 0000000000201350 <bar2@plt>:
  52 // DISASM-NEXT:   201350:       jmpq    *8514(%rip)
  53 // DISASM-NEXT:   201356:       pushq   $0
  54 // DISASM-NEXT:   20135b:       jmp     0x201340 <.plt>
  55 // DISASM-EMPTY:
  56 // DISASM-NEXT: 0000000000201360 <zed2@plt>:
  57 // DISASM-NEXT:   201360:       jmpq    *8506(%rip)
  58 // DISASM-NEXT:   201366:       pushq   $1
  59 // DISASM-NEXT:   20136b:       jmp     0x201340 <.plt>
  60
  61 .text
  62 .type foo STT_GNU_IFUNC
  63 .globl foo
  64 foo:
  65  ret
  66
  67 .type bar STT_GNU_IFUNC
  68 .globl bar
  69 bar:
  70  ret
  71
  72 .globl _start
  73 _start:
  74  call foo
  75  call bar
  76  call bar2
  77  call zed2