lld/test/ELF/arm-fix-cortex-a8-thunk.s

   1 // REQUIRES: arm
   2 // RUN: llvm-mc -filetype=obj -triple=armv7a-linux-gnueabihf --arm-add-build-attributes %s -o %t.o
   3 // RUN: echo "SECTIONS { \
   4 // RUN:          .text0 0x011006 : { *(.text.00) } \
   5 // RUN:          .text1 0x110000 : { *(.text.01) *(.text.02) *(.text.03) \
   6 // RUN:                             *(.text.04) } \
   7 // RUN:          .text2 0x210000 : { *(.text.05) } } " > %t.script
   8 // RUN: ld.lld --script %t.script --fix-cortex-a8 --shared -verbose %t.o -o %t2 2>&1
   9 // RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t2 | FileCheck %s
  10
  11 /// Test cases for Cortex-a8 Erratum 657417 that involve interactions with
  12 /// range extension thunks. Both erratum fixes and range extension thunks need
  13 /// precise information and after creation alter address information.
  14  .thumb
  15
  16  .section .text.00, "ax", %progbits
  17  .thumb_func
  18 early:
  19  bx lr
  20
  21  .section .text.01, "ax", %progbits
  22  .balign 4096
  23  .globl _start
  24  .type _start, %function
  25 _start:
  26   beq.w far_away
  27 /// Thunk to far_away and state change needed, size 12-bytes goes here.
  28 // CHECK: 00110004 <__ThumbV7PILongThunk_far_away>:
  29 // CHECK-NEXT: 110004: movw    r12, #65524
  30 // CHECK-NEXT:         movt    r12, #15
  31 // CHECK-NEXT:         add     r12, pc
  32 // CHECK-NEXT:         bx      r12
  33
  34  .section .text.02, "ax", %progbits
  35  .space 4096 - 22
  36
  37  .section .text.03, "ax", %progbits
  38  .thumb_func
  39 target:
  40 /// After thunk is added this branch will line up across 2 4 KiB regions
  41 /// and will trigger a patch.
  42  nop.w
  43  bl target
  44
  45 /// Expect erratum patch inserted here
  46 // CHECK: 00110ffa <target>:
  47 // CHECK-NEXT: 110ffa: nop.w
  48 // CHECK-NEXT:         bl      0x111004 <__CortexA8657417_110FFE>
  49 // CHECK: 00111004 <__CortexA8657417_110FFE>:
  50 // CHECK-NEXT: 111004: b.w     0x110ffa <target>
  51
  52 /// Expect range extension thunk here.
  53 // CHECK: 00111008 <__ThumbV7PILongThunk_early>:
  54 // CHECK-NEXT: 111008: b.w     0x11006 <early>
  55
  56  .section .text.04, "ax", %progbits
  57 /// The erratum patch will push this branch out of range, so another
  58 /// range extension thunk will be needed.
  59         beq.w early
  60 // CHECK:   11100c:            beq.w   0x111008 <__ThumbV7PILongThunk_early>
  61
  62  .section .text.05, "ax", %progbits
  63  .arm
  64  nop
  65  .type far_away, %function
  66 far_away:
  67   bx lr