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

   1 // REQUIRES: aarch64
   2 // RUN: llvm-mc -filetype=obj -triple=aarch64-none-linux %s -o %t.o
   3 // RUN: echo "SECTIONS { \
   4 // RUN:          .text1 0x10000 : { *(.text.01) *(.text.02) *(.text.03) } \
   5 // RUN:          .text2 0x8010000 : { *(.text.04) } } " > %t.script
   6 // RUN: ld.lld --script %t.script -fix-cortex-a53-843419 -verbose %t.o -o %t2 \
   7 // RUN:   2>&1 | FileCheck -check-prefix=CHECK-PRINT %s
   8 // RUN: llvm-objdump --no-show-raw-insn --triple=aarch64-linux-gnu -d %t2 | FileCheck %s
   9
  10 /// %t2 is 128 Megabytes, so delete it early.
  11 // RUN: rm %t2
  12
  13 /// Test cases for Cortex-A53 Erratum 843419 that involve interactions with
  14 /// range extension thunks. Both erratum fixes and range extension thunks need
  15 /// precise address information and after creation alter address information.
  16
  17
  18         .section .text.01, "ax", %progbits
  19         .balign 4096
  20         .globl _start
  21         .type _start, %function
  22 _start:
  23         bl far_away
  24         /// Thunk to far_away, size 16-bytes goes here.
  25
  26         .section .text.02, "ax", %progbits
  27         .space 4096 - 28
  28
  29         /// Erratum sequence will only line up at address 0 modulo 0xffc when
  30         /// Thunk is inserted.
  31         .section .text.03, "ax", %progbits
  32         .globl t3_ff8_ldr
  33         .type t3_ff8_ldr, %function
  34 t3_ff8_ldr:
  35         adrp x0, dat
  36         ldr x1, [x1, #0]
  37         ldr x0, [x0, :got_lo12:dat]
  38         ret
  39
  40 // CHECK-PRINT: detected cortex-a53-843419 erratum sequence starting at 10FF8 in unpatched output.
  41 // CHECK: 0000000000010ff8 <t3_ff8_ldr>:
  42 // CHECK-NEXT: adrp    x0, 0x8010000
  43 // CHECK-NEXT: ldr     x1, [x1]
  44 // CHECK-NEXT: b       0x11008
  45 // CHECK-NEXT: ret
  46 // CHECK: 0000000000011008 <__CortexA53843419_11000>:
  47 // CHECK-NEXT: ldr     x0, [x0, #8]
  48 // CHECK-NEXT: b       0x11004
  49         .section .text.04, "ax", %progbits
  50         .globl far_away
  51         .type far_away, function
  52 far_away:
  53         ret
  54
  55         .section .data
  56         .globl dat
  57 dat:    .quad 0