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

   1 // REQUIRES: aarch64
   2 // RUN: split-file %s %t
   3 // RUN: llvm-mc -filetype=obj -triple=aarch64 --asm-macro-max-nesting-depth=40000 %t/asm -o %t.o
   4 // RUN: ld.lld -T %t/lds -fix-cortex-a53-843419 %t.o -o %t2 --print-map 2>&1 | FileCheck %s
   5 /// %t2 is more than 128MiB. Delete it early.
   6 // RUN: rm %t.o %t2
   7
   8 //--- asm
   9 /// We use %(\parameter) to evaluate expression, which requires .altmacro.
  10  .altmacro
  11
  12 /// Test to reproduce the conditions that trigger R_AARCH64_JUMP26 out of range
  13 /// errors in pr44071. We create a large number of patches and thunks, with an
  14 /// LLD with the fault, the patches will be inserted after the thunks and due
  15 /// to the size of the thunk section some of the patches go out of range.
  16 /// With a fixed LLD the patches are inserted before the thunks.
  17
  18 // CHECK: <internal>:(.text.patch)
  19 // CHECK: <internal>:(.text.thunk)
  20
  21 /// Macro to generate the cortex-a53-843419 patch sequence
  22  .macro ERRATA from, to
  23    .balign 4096
  24    .space 4096 - 8
  25    adrp x0, dat1
  26    ldr x1, [x1, #0]
  27    ldr x0, [x0, :got_lo12:dat1]
  28    ret
  29    .if (\to-\from)
  30      ERRATA %(\from+1),\to
  31    .endif
  32  .endm
  33
  34  .section .text.01, "ax", %progbits
  35  .balign 4096
  36  .globl _start
  37  .type _start, %function
  38  .space 4096 - 8
  39 _start:
  40 /// Generate lots of patches.
  41  ERRATA 0, 4000
  42
  43  .macro CALLS from, to
  44    bl far\from
  45    .if (\to-\from)
  46      CALLS %(\from+1),\to
  47    .endif
  48  .endm
  49
  50  /// Generate long range thunks. These are inserted before the patches. Generate
  51  /// a sufficient number such that the patches must be placed before the
  52  /// .text.thunk section, and if they aren't some of the patches go out of
  53  /// range.
  54  .section .text.02, "ax", %progbits
  55  .global func
  56  .type func, %function
  57 func:
  58  CALLS 0, 20000
  59
  60  .section .text.03, "ax", %progbits
  61  .global space1
  62 space1:
  63  .space (1024 * 1024 * 96) + (120 * 4 * 1024)
  64  .balign 4096
  65
  66  .section .text.04, "ax", %progbits
  67  .global space2
  68 space2:
  69  .space 1024 * 1024
  70
  71  .macro DEFS from, to
  72    .global far\from
  73    .type far\from, %function
  74 far\from:
  75    ret
  76    .if (\to-\from)
  77      DEFS %(\from+1),\to
  78    .endif
  79  .endm
  80
  81  /// Define the thunk targets
  82  .section .target, "ax", %progbits
  83  DEFS 0, 20000
  84
  85  .data
  86  .global dat1
  87 dat1:
  88  .xword 0
  89
  90 //--- lds
  91 PHDRS {
  92   low PT_LOAD FLAGS(0x1 | 0x4);
  93   high PT_LOAD FLAGS(0x1 | 0x4);
  94 }
  95 SECTIONS {
  96   .text1 0x10000 : { *(.text.*) } :low
  97   .text2 0xf010000 : { *(.target) } :high
  98 }