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

   1 # REQUIRES: aarch64
   2 # RUN: llvm-mc -filetype=obj -triple=aarch64-none-linux-gnu %s -o %t.o
   3 # RUN: ld.lld -shared %t.o -o %tout
   4 # RUN: llvm-objdump -D --no-show-raw-insn %tout | FileCheck %s
   5 # RUN: llvm-readobj -r %tout | FileCheck %s --check-prefix=CHECK-RELOCS
   6
   7 # Test that when we take the address of a preemptible ifunc in a shared object
   8 # we get R_AARCH64_GLOB_DAT to the symbol as it could be defined in another
   9 # link unit and preempt our definition.
  10 .text
  11 .globl myfunc
  12 .type myfunc,@gnu_indirect_function
  13 myfunc:
  14  ret
  15
  16 .text
  17 .globl main
  18 .type main,@function
  19 main:
  20  adrp x8, :got:myfunc
  21  ldr  x8, [x8, :got_lo12:myfunc]
  22  ret
  23 # CHECK:   0000000000010284 <main>:
  24 ## myfunc's got entry = page(0x20330)-page(0x10284) + 0x330 = 65536 + 816
  25 # CHECK-NEXT:    10284: adrp    x8, 0x20000
  26 # CHECK-NEXT:    10288: ldr     x8, [x8, #816]
  27 # CHECK-NEXT:    1028c: ret
  28
  29 # CHECK: Disassembly of section .got:
  30 # CHECK-EMPTY:
  31 # CHECK-NEXT: 0000000000020330 <.got>:
  32
  33 # CHECK-RELOCS: Relocations [
  34 # CHECK-RELOCS-NEXT:   Section {{.*}} .rela.dyn {
  35 # CHECK-RELOCS-NEXT:     0x20330 R_AARCH64_GLOB_DAT myfunc 0x0
  36 # CHECK-RELOCS-NEXT:   }
  37 # CHECK-RELOCS-NEXT: ]