lld/test/ELF/arm-tls-le32.s

   1 // REQUIRES: arm
   2 // RUN: llvm-mc %s -o %t.o -filetype=obj -triple=armv7a-linux-gnueabi
   3 // RUN: ld.lld %t.o -o %t
   4 // RUN: llvm-readobj -S --dyn-relocations %t | FileCheck --check-prefix=SEC %s
   5 // RUN: llvm-objdump -d --triple=armv7a-linux-gnueabi %t | FileCheck %s
   6
   7 /// Test the handling of the local exec TLS model. TLS can be resolved
   8 /// statically for an application. The code sequences assume a thread pointer
   9 /// in r9
  10
  11 /// Reject local-exec TLS relocations for -shared.
  12 // RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR --implicit-check-not=error:
  13
  14 // ERR: error: relocation R_ARM_TLS_LE32 against x cannot be used with -shared
  15 // ERR: error: relocation R_ARM_TLS_LE32 against y cannot be used with -shared
  16 // ERR: error: relocation R_ARM_TLS_LE32 against z cannot be used with -shared
  17
  18  .text
  19  .syntax unified
  20  .globl  _start
  21  .p2align        2
  22  .type   _start,%function
  23 _start:
  24  .p2align        2
  25 /// Generate R_ARM_TLS_LE32 relocations. These resolve statically to the offset
  26 /// of the variable from the thread pointer
  27 .Lt0: .word   x(TPOFF)
  28 .Lt1: .word   y(TPOFF)
  29 .Lt2: .word   z(TPOFF)
  30
  31 /// __thread int x = 10
  32 /// __thread int y;
  33 /// __thread int z __attribute((visibility("hidden")))
  34
  35  .hidden z
  36  .globl  z
  37  .globl  y
  38  .globl  x
  39
  40  .section       .tbss,"awT",%nobits
  41  .p2align  2
  42 .TLSSTART:
  43  .type  z, %object
  44 z:
  45  .space 4
  46  .type  y, %object
  47 y:
  48  .space 4
  49  .section       .tdata,"awT",%progbits
  50  .p2align 2
  51  .type  x, %object
  52 x:
  53  .word  10
  54
  55 // SEC:      Name: .tdata
  56 // SEC-NEXT: Type: SHT_PROGBITS
  57 // SEC-NEXT: Flags [
  58 // SEC-NEXT:   SHF_ALLOC
  59 // SEC-NEXT:   SHF_TLS
  60 // SEC-NEXT:   SHF_WRITE
  61 // SEC-NEXT:  ]
  62 // SEC-NEXT: Address: 0x30120
  63 // SEC:      Size: 4
  64 // SEC:      Name: .tbss
  65 // SEC-NEXT: Type: SHT_NOBITS
  66 // SEC-NEXT: Flags [
  67 // SEC-NEXT:   SHF_ALLOC
  68 // SEC-NEXT:   SHF_TLS
  69 // SEC-NEXT:   SHF_WRITE
  70 // SEC-NEXT: ]
  71 // SEC-NEXT: Address: 0x30124
  72 // SEC:      Size: 8
  73
  74 // SEC: Dynamic Relocations {
  75 // SEC-NEXT: }
  76
  77 // CHECK: Disassembly of section .text:
  78 // CHECK-EMPTY:
  79 // CHECK-NEXT: <_start>:
  80 /// offset of x from Thread pointer = (TcbSize + 0x0 = 0x8)
  81 // CHECK-NEXT:   20114:         00000008
  82 /// offset of z from Thread pointer = (TcbSize + 0x8 = 0x10)
  83 // CHECK-NEXT:   20118:         00000010
  84 /// offset of y from Thread pointer = (TcbSize + 0x4 = 0xc)
  85 // CHECK-NEXT:   2011c:         0000000c