lld/test/ELF/x86-64-tls-opt-noplt.s

   1 // REQUIRES: x86
   2
   3 // Checks whether the TLS optimizations match the cases in Chapter 11 of
   4 // https://raw.githubusercontent.com/wiki/hjl-tools/x86-psABI/x86-64-psABI-1.0.pdf
   5
   6 // RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o
   7 // RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/tls-opt-gdie.s -o %tso.o
   8 // RUN: ld.lld -shared %tso.o -soname=t.so -o %t.so
   9 // RUN: ld.lld %t.o %t.so -o %t1
  10 // RUN: llvm-readobj -r %t1 | FileCheck --check-prefix=RELOC %s
  11 // RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t1 | FileCheck --check-prefix=DISASM %s
  12
  13 // RELOC:      Relocations [
  14 // RELOC-NEXT:  Section {{.*}} .rela.dyn {
  15 // RELOC-NEXT:    0x202420 R_X86_64_TPOFF64 tlsshared0 0x0
  16 // RELOC-NEXT:    0x202428 R_X86_64_TPOFF64 tlsshared1 0x0
  17 // RELOC-NEXT:  }
  18 // RELOC-NEXT: ]
  19
  20 // DISASM:      <_start>:
  21
  22 // Table 11.5: GD -> IE Code Transition (LP64)
  23 // DISASM-NEXT:               movq %fs:0, %rax
  24 // DISASM-NEXT: 201309:       addq 4368(%rip), %rax
  25 // DISASM-NEXT:               movq %fs:0, %rax
  26 // DISASM-NEXT: 201319:       addq 4360(%rip), %rax
  27
  28 // Table 11.7: GD -> LE Code Transition (LP64)
  29 // DISASM-NEXT:               movq %fs:0, %rax
  30 // DISASM-NEXT:               leaq -8(%rax), %rax
  31 // DISASM-NEXT:               movq %fs:0, %rax
  32 // DISASM-NEXT:               leaq -4(%rax), %rax
  33
  34
  35 // Table 11.9: LD -> LE Code Transition (LP64)
  36 // DISASM-NEXT:               movq %fs:0, %rax
  37 // DISASM-NEXT:               movq %fs:0, %rax
  38
  39 .type tls0,@object
  40 .section .tbss,"awT",@nobits
  41 .globl tls0
  42 .align 4
  43 tls0:
  44  .long 0
  45  .size tls0, 4
  46
  47 .type  tls1,@object
  48 .globl tls1
  49 .align 4
  50 tls1:
  51  .long 0
  52  .size tls1, 4
  53
  54 .section .text
  55 .globl _start
  56 _start:
  57  // Table 11.5: GD -> IE Code Transition (LP64)
  58  .byte  0x66
  59  leaq   tlsshared0@tlsgd(%rip),%rdi
  60  .byte  0x66
  61  rex64
  62  call   *__tls_get_addr@GOTPCREL(%rip)
  63
  64  .byte  0x66
  65  leaq   tlsshared1@tlsgd(%rip),%rdi
  66  .byte  0x66
  67  rex64
  68  call   *__tls_get_addr@GOTPCREL(%rip)
  69
  70  // Table 11.7: GD -> LE Code Transition (LP64)
  71  .byte  0x66
  72  leaq   tls0@tlsgd(%rip),%rdi
  73  .byte  0x66
  74  rex64
  75  call   *__tls_get_addr@GOTPCREL(%rip)
  76
  77  .byte  0x66
  78  leaq   tls1@tlsgd(%rip),%rdi
  79  .byte  0x66
  80  rex64
  81  call   *__tls_get_addr@GOTPCREL(%rip)
  82
  83  // Table 11.9: LD -> LE Code Transition (LP64)
  84  leaq   tls0@tlsld(%rip),%rdi
  85  call   *__tls_get_addr@GOTPCREL(%rip)
  86
  87  leaq   tls1@tlsld(%rip),%rdi
  88  call   *__tls_get_addr@GOTPCREL(%rip)