lld/test/ELF/aarch64-feature-bti-plt.s

   1 # REQUIRES: aarch64
   2
   3 # RUN: rm -rf %t && split-file %s %t
   4
   5 # RUN: llvm-mc --triple=aarch64 --filetype=obj -o %t.o %t/a.s
   6 # RUN: ld.lld --shared -T %t/largegap.lds -z force-bti %t.o -o %t.elf
   7 # RUN: llvm-objdump -d %t.elf | FileCheck %s
   8
   9 #--- largegap.lds
  10 SECTIONS {
  11   .plt : { *(.plt) }
  12   .text.near 0x1000 : AT(0x1000) { *(.text.near) }
  13   .text.far 0xf0000000 : AT(0xf0000000) { *(.text.far) }
  14 }
  15
  16 #--- a.s
  17 # CHECK:        <.plt>:
  18 # CHECK-NEXT:     bti     c
  19
  20 ## foo@plt is targeted by a range extension thunk with an indirect branch.
  21 ## Add a bti c instruction.
  22 # CHECK:        <foo@plt>:
  23 # CHECK-NEXT:     bti     c
  24
  25 ## biz is not targeted by a thunk using an indirect branch, so no need for bti c.
  26 # CHECK:        <biz@plt>:
  27 # CHECK-NEXT:     adrp    x16, {{.*}} <func>
  28
  29 # CHECK:         <bar>:
  30 # CHECK-NEXT:      bl   {{.*}} <foo@plt>
  31 # CHECK-NEXT:      bl   {{.*}} <biz@plt>
  32
  33 # CHECK:         <func>:
  34 # CHECK-NEXT:      bl   {{.*}} <__AArch64ADRPThunk_foo>
  35
  36 # CHECK:         <__AArch64ADRPThunk_foo>:
  37 # CHECK-NEXT:      adrp    x16, 0x0 <foo>
  38 # CHECK-NEXT:      add     x16, x16, {{.*}}
  39 # CHECK-NEXT:      br      x16
  40
  41         .global foo
  42         .global biz
  43         .section .text.near, "ax", %progbits
  44 bar:
  45         .type bar, %function
  46         bl foo
  47         bl biz
  48         ret
  49
  50         .section .text.far, "ax", %progbits
  51 func:
  52         .type func, %function
  53         bl foo
  54         ret