lld/test/ELF/arm-tls-gd32.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 global-dynamic TLS model. Dynamic Loader finds
   8 /// module index R_ARM_TLS_DTPMOD32 and the offset within the module
   9 /// R_ARM_TLS_DTPOFF32. One of the variables is hidden which permits relaxation
  10 /// to local dynamic
  11
  12  .text
  13  .syntax unified
  14  .globl  func
  15  .p2align        2
  16  .type   func,%function
  17 func:
  18 .L0:
  19  nop
  20 .L1:
  21  nop
  22 .L2:
  23  nop
  24
  25  .p2align        2
  26 /// Generate R_ARM_TLS_GD32 relocations
  27 /// Allocates a pair of GOT entries dynamically relocated by R_ARM_TLS_DTPMOD32
  28 /// and R_ARM_TLS_DTPOFF32 respectively. The literal contains the offset of the
  29 /// first GOT entry from the place
  30 .Lt0: .word   x(TLSGD) + (. - .L0 - 8)
  31 .Lt1: .word   y(TLSGD) + (. - .L1 - 8)
  32 .Lt2: .word   z(TLSGD) + (. - .L2 - 8)
  33
  34 /// __thread int x = 10
  35 /// __thread int y;
  36 /// __thread int z __attribute((visibility("hidden")))
  37
  38  .hidden z
  39  .globl  z
  40  .globl  y
  41  .globl  x
  42
  43  .section       .tbss,"awT",%nobits
  44  .p2align  2
  45 .TLSSTART:
  46  .type  z, %object
  47 z:
  48  .space 4
  49  .type  y, %object
  50 y:
  51  .space 4
  52  .section       .tdata,"awT",%progbits
  53  .p2align 2
  54  .type  x, %object
  55 x:
  56  .word  10
  57
  58 // SEC:      Name: .tdata
  59 // SEC-NEXT: Type: SHT_PROGBITS
  60 // SEC-NEXT: Flags [
  61 // SEC-NEXT:   SHF_ALLOC
  62 // SEC-NEXT:   SHF_TLS
  63 // SEC-NEXT:   SHF_WRITE
  64 // SEC-NEXT:  ]
  65 // SEC-NEXT: Address: 0x20210
  66 // SEC:      Size: 4
  67 // SEC:      Name: .tbss
  68 // SEC-NEXT: Type: SHT_NOBITS
  69 // SEC-NEXT: Flags [
  70 // SEC-NEXT:   SHF_ALLOC
  71 // SEC-NEXT:   SHF_TLS
  72 // SEC-NEXT:   SHF_WRITE
  73 // SEC-NEXT: ]
  74 // SEC-NEXT: Address: 0x20214
  75 // SEC:      Size: 8
  76
  77 // SEC:      Name: .got
  78 // SEC-NEXT: Type: SHT_PROGBITS
  79 // SEC-NEXT: Flags [
  80 // SEC-NEXT:   SHF_ALLOC
  81 // SEC-NEXT:   SHF_WRITE
  82 // SEC-NEXT: ]
  83 // SEC-NEXT: Address: 0x20264
  84 // SEC:      Size: 24
  85
  86 // SEC: Dynamic Relocations {
  87 // SEC-NEXT: 0x20274 R_ARM_TLS_DTPMOD32 -
  88 // SEC-NEXT: 0x20264 R_ARM_TLS_DTPMOD32 x
  89 // SEC-NEXT: 0x20268 R_ARM_TLS_DTPOFF32 x
  90 // SEC-NEXT: 0x2026C R_ARM_TLS_DTPMOD32 y
  91 // SEC-NEXT: 0x20270 R_ARM_TLS_DTPOFF32 y
  92
  93
  94 // CHECK-LABEL: 000101f8 <func>:
  95 // CHECK-NEXT:    101f8:      e320f000        nop
  96 // CHECK-NEXT:    101fc:      e320f000        nop
  97 // CHECK-NEXT:    10200:      e320f000        nop
  98
  99 /// (0x20264 - 0x1204) + (0x10204 - 0x101f8 - 8) = 0x1f064
 100 // CHECK:         10204: 64 00 01 00
 101 /// (0x2026c - 0x10204) + (0x10204 - 0x101fc - 8) = 0x10068
 102 // CHECK-NEXT:    10208: 68 00 01 00
 103 /// (0x20274 - 0x10204) + (0x10204 - 0x10200 - 8) = 0x1006c
 104 // CHECK-NEXT:    1020c: 6c 00 01 00
 105