lld/test/ELF/aarch64-cortex-a53-843419-thunk-align.s

   1 // REQUIRES: aarch64
   2 // RUN: llvm-mc -filetype=obj -triple=aarch64-none-linux %s -o %t.o
   3 // RUN: echo "SECTIONS { \
   4 // RUN:                  .text 0x10000 : { \
   5 // RUN:                  *(.text.01) ; \
   6 // RUN:                  . += 0x8000000 ;  \
   7 // RUN:                  *(.text.02) } \
   8 // RUN:                  .foo : { *(.foo_sec) } } " > %t.script
   9 // RUN: ld.lld -pie --fix-cortex-a53-843419 --script=%t.script %t.o -o %t2
  10 // RUN: llvm-objdump --no-show-raw-insn --triple=aarch64-linux-gnu -d %t2
  11
  12
  13 /// %t2 is > 128 Megabytes, so delete it early.
  14 // RUN: rm %t2
  15
  16 /// Test case that for an OutputSection larger than the ThunkSectionSpacing
  17 /// --fix-cortex-a53-843419 will cause the size of the ThunkSection to be
  18 /// rounded up to the nearest 4KiB
  19
  20  .section .text.01, "ax", %progbits
  21  .balign 4096
  22  .globl _start
  23  .type _start, %function
  24 _start:
  25 /// Range extension thunk needed, due to linker script
  26  bl far_away
  27  .space 4096 - 12
  28
  29 /// Erratum sequence
  30  .globl t3_ff8_ldr
  31  .type t3_ff8_ldr, %function
  32 t3_ff8_ldr:
  33  adrp x0, dat
  34  ldr x1, [x1, #0]
  35  ldr x0, [x0, :lo12:dat]
  36  ret
  37
  38 /// Expect thunk and patch to be inserted here
  39 // CHECK: 0000000000011008 __AArch64ADRPThunk_far_away:
  40 // CHECK-NEXT: 11008: adrp    x16, #134221824
  41 // CHECK-NEXT:        add     x16, x16, #16
  42 // CHECK-NEXT:        br      x16
  43 // CHECK: 0000000000012008 __CortexA53843419_11000:
  44 // CHECK-NEXT: 12008: ldr     x0, [x0, #168]
  45 // CHECK-NEXT:        b       #-4104 <t3_ff8_ldr+0xc>
  46
  47  .section .text.02, "ax", %progbits
  48  .globl far_away
  49  .type far_away, function
  50 far_away:
  51  bl _start
  52  ret
  53 /// Expect thunk for _start not to have size rounded up to 4KiB as it is at
  54 /// the end of the OutputSection
  55 // CHECK: 0000000008012010 far_away:
  56 // CHECK-NEXT:  8012010: bl      #8
  57 // CHECK-NEXT:           ret
  58 // CHECK: 0000000008012018 __AArch64ADRPThunk__start:
  59 // CHECK-NEXT:  8012018: adrp    x16, #-134225920
  60 // CHECK-NEXT:           add     x16, x16, #0
  61 // CHECK-NEXT:           br      x16
  62 // CHECK: 0000000008012024 foo:
  63 // CHECK-NEXT:  8012024: ret
  64  .section .foo_sec, "ax", %progbits
  65  .globl foo
  66  .type foo, function
  67 foo:
  68   ret
  69
  70
  71  .section .data
  72  .balign 8
  73  .globl dat
  74 dat:    .quad 0