lld/test/ELF/i386-tlsdesc-ld.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=i386 %s -o %t.o
   3
   4 # RUN: ld.lld -shared -z now %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 -z now %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:      .rel.dyn {
  14 # LD-REL-NEXT:   R_386_TLS_DESC -
  15 # LD-REL-NEXT: }
  16
  17 ## 0x2318-0x1267 = 4273
  18 ## dtpoff(a) = 8, dtpoff(b) = 12
  19 # LD:      leal -8(%ebx), %eax
  20 # LD-NEXT: calll *(%eax)
  21 # LD-NEXT: leal 8(%eax), %ecx
  22 # LD-NEXT: leal 12(%eax), %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:      leal 0, %eax
  31 # LE-NEXT: nop
  32 # LE-NEXT: leal -8(%eax), %ecx
  33 # LE-NEXT: leal -4(%eax), %edx
  34 # LE-NEXT: addl %gs:0, %ecx
  35 # LE-NEXT: addl %gs:0, %edx
  36
  37 leal _TLS_MODULE_BASE_@tlsdesc(%ebx), %eax
  38 call *_TLS_MODULE_BASE_@tlscall(%eax)
  39 leal a@dtpoff(%eax), %ecx
  40 leal b@dtpoff(%eax), %edx
  41 addl %gs:0, %ecx
  42 addl %gs:0, %edx
  43
  44 .section .tbss
  45 .zero 8
  46 a:
  47 .zero 4
  48 b:
  49 .zero 4