lld/test/ELF/arm-tls-ie32.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.so -shared
   4 // RUN: llvm-readobj -S --dyn-relocations %t.so | FileCheck --check-prefix=SEC %s
   5 // RUN: llvm-objdump -d --triple=armv7a-linux-gnueabi %t.so | FileCheck %s
   6
   7 /// Test the handling of the initial-exec TLS model. Relative location within
   8 /// static TLS is a run-time constant computed by dynamic loader as a result
   9 /// of the R_ARM_TLS_TPOFF32 relocation.
  10
  11  .syntax unified
  12  .arm
  13  .globl func
  14  .type  func,%function
  15  .p2align 2
  16 func:
  17 .L0:
  18  nop
  19 .L1:
  20  nop
  21 .L2:
  22  nop
  23
  24  .p2align 2
  25 /// Generate R_ARM_TLS_IE32 static relocations
  26 /// Allocates a GOT entry dynamically relocated by R_ARM_TLS_TPOFF32
  27 /// literal contains the offset of the GOT entry from the place
  28 .Lt0: .word  x(gottpoff) + (. - .L0 - 8)
  29 .Lt1: .word  y(gottpoff) + (. - .L1 - 8)
  30 .Lt2: .word  .TLSSTART(gottpoff) + (. - .L2 - 8)
  31
  32 /// __thread int x = 10
  33 /// __thread int y;
  34 /// __thread int z __attribute((visibility("hidden")))
  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:      Size: 4
  62 // SEC:      Name: .tbss
  63 // SEC-NEXT: Type: SHT_NOBITS
  64 // SEC-NEXT: Flags [
  65 // SEC-NEXT:   SHF_ALLOC
  66 // SEC-NEXT:   SHF_TLS
  67 // SEC-NEXT:   SHF_WRITE
  68 // SEC: Size: 8
  69
  70 // SEC:      Name: .got
  71 // SEC-NEXT: Type: SHT_PROGBITS
  72 // SEC-NEXT: Flags [
  73 // SEC-NEXT:    SHF_ALLOC
  74 // SEC-NEXT:    SHF_WRITE
  75 // SEC-NEXT: ]
  76 // SEC-NEXT: Address: 0x20254
  77 // SEC:      Size: 12
  78
  79
  80 // SEC: Dynamic Relocations {
  81 // SEC:  0x2025C R_ARM_TLS_TPOFF32
  82 // SEC:  0x20254 R_ARM_TLS_TPOFF32 x
  83 // SEC:  0x20258 R_ARM_TLS_TPOFF32 y
  84
  85 // CHECK: Disassembly of section .text:
  86 // CHECK-EMPTY:
  87 // CHECK-NEXT: <func>:
  88 // CHECK-NEXT:    101e8: 00 f0 20 e3     nop
  89 // CHECK-NEXT:    101ec: 00 f0 20 e3     nop
  90 // CHECK-NEXT:    101f0: 00 f0 20 e3     nop
  91
  92 /// (0x20254 - 0x101f4) + (0x101f4 - 0x101e8 - 8) = 0x10064
  93 // CHECK:         101f4: 64 00 01 00
  94 /// (0x20258 - 0x101f8) + (0x101f8 - 0x101ec - 8) = 0x10064
  95 // CHECK-NEXT:    101f8: 64 00 01 00
  96 /// (0x2025c - 0x101f8) + (0x101f8 - 0x101f0 - 8) = 0x10064
  97 // CHECK-NEXT:    101fc: 64 00 01 00