lld/test/ELF/x86-64-tlsdesc-ld.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o
   3
   4 # RUN: ld.lld -shared %t.o -o %t.so
   5 # RUN: llvm-readobj -r %t.so | FileCheck --check-prefix=LD-REL %s
   6 # RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t.so | FileCheck --check-prefix=LD %s
   7
   8 # RUN: ld.lld %t.o -o %t
   9 # RUN: llvm-readelf -r %t | FileCheck --check-prefix=NOREL %s
  10 # RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t | FileCheck --check-prefix=LE %s
  11
  12 ## Check _TLS_MODULE_BASE_ used by LD produces a dynamic relocation with a value of 0.
  13 # LD-REL:      .rela.dyn {
  14 # LD-REL-NEXT:   0x2318 R_X86_64_TLSDESC - 0x0
  15 # LD-REL-NEXT: }
  16
  17 ## 0x2318-0x1267 = 4273
  18 ## dtpoff(a) = 8, dtpoff(b) = 12
  19 # LD:            leaq 4273(%rip), %rax
  20 # LD-NEXT: 1267: callq *(%rax)
  21 # LD-NEXT:       movl %fs:8(%rax), %edx
  22 # LD-NEXT:       addl %fs:12(%rax), %edx
  23
  24 ## When producing an executable, the LD code sequence can be relaxed to LE.
  25 ## It is the same as GD->LE.
  26 ## tpoff(_TLS_MODULE_BASE_) = 0, tpoff(a) = -8, tpoff(b) = -4
  27
  28 # NOREL: no relocations
  29
  30 # LE:      movq $0, %rax
  31 # LE-NEXT: nop
  32 # LE-NEXT: movl %fs:-8(%rax), %edx
  33 # LE-NEXT: addl %fs:-4(%rax), %edx
  34
  35 # RUN: ld.lld -r %t.o -o %t.ro
  36 # RUN: llvm-readelf -s %t.ro | FileCheck --check-prefix=RELOCATABLE %s
  37 # RUN: ld.lld %t.ro -o %t
  38 # RUN: llvm-readelf -r %t | FileCheck --check-prefix=NOREL %s
  39 # RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t | FileCheck --check-prefix=LE %s
  40
  41 # RELOCATABLE: 0000000000000000 0 TLS GLOBAL DEFAULT UND _TLS_MODULE_BASE_
  42
  43 leaq _TLS_MODULE_BASE_@tlsdesc(%rip), %rax
  44 call *_TLS_MODULE_BASE_@tlscall(%rax)
  45 movl %fs:a@dtpoff(%rax), %edx
  46 addl %fs:b@dtpoff(%rax), %edx
  47
  48 .section .tbss
  49 .zero 8
  50 a:
  51 .zero 4
  52 b:
  53 .zero 4