lld/test/ELF/aarch64-gnu-ifunc-nonpreemptable.s

   1 # REQUIRES: aarch64
   2 # RUN: llvm-mc -filetype=obj -triple=aarch64 %s -o %t.o
   3
   4 # RUN: ld.lld --no-relax %t.o -o %t
   5 # RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t | FileCheck %s --check-prefix=PDE
   6 # RUN: llvm-readobj -r %t | FileCheck %s --check-prefix=PDE-RELOC
   7
   8 # RUN: ld.lld -pie --no-relax %t.o -o %t
   9 # RUN: ld.lld -pie --no-relax --apply-dynamic-relocs %t.o -o %t.apply
  10 # RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t | FileCheck %s --check-prefix=PIE
  11 # RUN: llvm-readobj -r -x .got.plt %t | FileCheck %s --check-prefixes=PIE-RELOC,NO-APPLY
  12 # RUN: llvm-readobj -r -x .got.plt %t.apply | FileCheck %s --check-prefixes=PIE-RELOC,APPLY
  13
  14 ## When compiling with -fno-PIE or -fPIE, if the ifunc is in the same
  15 ## translation unit as the address taker, the compiler knows that ifunc is not
  16 ## defined in a shared library so it can use a non GOT generating relative reference.
  17 .text
  18 .globl myfunc
  19 .type myfunc,@gnu_indirect_function
  20 myfunc:
  21 .globl myfunc_resolver
  22 .type myfunc_resolver,@function
  23 myfunc_resolver:
  24  ret
  25
  26 .text
  27 .globl main
  28 .type main,@function
  29 main:
  30  adrp x8, myfunc
  31  add  x8, x8, :lo12: myfunc
  32  ret
  33
  34 ## The address of myfunc is the address of the PLT entry for myfunc.
  35 # PDE:      <myfunc_resolver>:
  36 # PDE-NEXT:   210170:   ret
  37 # PDE:      <main>:
  38 # PDE-NEXT:   210174:   adrp    x8, 0x210000
  39 # PDE-NEXT:   210178:   add     x8, x8, #384
  40 # PDE-NEXT:   21017c:   ret
  41 # PDE-EMPTY:
  42 # PDE-NEXT: Disassembly of section .iplt:
  43 # PDE-EMPTY:
  44 # PDE-NEXT: <myfunc>:
  45 ## page(.got.plt) - page(0x210010) = 65536
  46 # PDE-NEXT:   210180: adrp    x16, 0x220000
  47 # PDE-NEXT:   210184: ldr     x17, [x16, #400]
  48 # PDE-NEXT:   210188: add     x16, x16, #400
  49 # PDE-NEXT:   21018c: br      x17
  50
  51 ## The adrp to myfunc should generate a PLT entry and a GOT entry with an
  52 ## irelative relocation.
  53 # PDE-RELOC:      .rela.dyn {
  54 # PDE-RELOC-NEXT:   0x220190 R_AARCH64_IRELATIVE - 0x210170
  55 # PDE-RELOC-NEXT: }
  56
  57 # PIE:      <myfunc_resolver>:
  58 # PIE-NEXT:    10260: ret
  59 # PIE:      <main>:
  60 # PIE-NEXT:    10264: adrp    x8, 0x10000
  61 # PIE-NEXT:    10268: add     x8, x8, #624
  62 # PIE-NEXT:    1026c: ret
  63 # PIE-EMPTY:
  64 # PIE-NEXT: Disassembly of section .iplt:
  65 # PIE-EMPTY:
  66 # PIE-NEXT: <myfunc>:
  67 # PIE-NEXT:    10270: adrp    x16, 0x30000
  68 # PIE-NEXT:           ldr     x17, [x16, #832]
  69 # PIE-NEXT:           add     x16, x16, #832
  70 # PIE-NEXT:           br      x17
  71
  72 # PIE-RELOC:      .rela.dyn {
  73 # PIE-RELOC-NEXT:   0x30340 R_AARCH64_IRELATIVE - 0x10260
  74 # PIE-RELOC-NEXT: }
  75 # PIE-RELOC:      Hex dump of section '.got.plt':
  76 # NO-APPLY:       0x00030340 00000000 00000000
  77 # APPLY:          0x00030340 60020100 00000000
  78 # PIE-RELOC-EMPTY: