lld/test/ELF/hexagon-tls-gd-nonpreemptible.s

   1
   2 # REQUIRES: hexagon
   3 # RUN: llvm-mc -filetype=obj -triple=hexagon-unknown-elf %s -o %t.o
   4 # RUN: ld.lld -shared %t.o -o %t.so
   5 # RUN: llvm-readobj -r %t.so | FileCheck --check-prefix=RELOC %s
   6 # RUN: llvm-readobj -r %t.o | FileCheck --check-prefix=REL %s
   7 # RUN: llvm-objdump -d --no-show-raw-insn --print-imm-hex %t.so | FileCheck %s
   8
   9 ## Prior to D77021 lld would error "relocation R_HEX_GD_PLT_B22_PCREL cannot refer to absolute symbol".
  10 ## A PC-relative relocation referencing a non-preemptible absolute symbol (due to STT_TLS) is not representable in -pie/-shared mode.
  11 ## For this case we will actually patch the symbol to the external __tls_get_addr which is preemptible.
  12
  13 .globl _start
  14 .type _start, @function
  15
  16 # RELOC:      Section ({{.*}}) .rela.plt {
  17 # RELOC-NEXT:   R_HEX_JMP_SLOT - 0x0
  18 # RELOC-NEXT:   R_HEX_JMP_SLOT __tls_get_addr 0x0
  19 # RELOC-NEXT: }
  20
  21 # REL:      R_HEX_B32_PCREL_X _GLOBAL_OFFSET_TABLE_ 0x0
  22 # REL-NEXT: R_HEX_6_PCREL_X _GLOBAL_OFFSET_TABLE_ 0x4
  23 # REL-NEXT: R_HEX_GD_GOT_32_6_X a 0x0
  24 # REL-NEXT: R_HEX_GD_GOT_16_X a 0x0
  25 # REL-NEXT: R_HEX_GD_PLT_B22_PCREL a 0x0
  26 # REL-NEXT: R_HEX_GD_PLT_B32_PCREL_X a 0x0
  27 # REL-NEXT: R_HEX_GD_PLT_B22_PCREL_X a 0x4
  28
  29 # CHECK:      { immext(#{{.*}})
  30 # CHECK-NEXT:   r2 = add(pc,##{{.*}}) }
  31 # CHECK-NEXT: { immext(#{{.*}})
  32 # CHECK-NEXT:   r0 = add(r2,##-{{.*}}) }
  33 # CHECK-NEXT: { call {{.*}} }
  34 # CHECK-NEXT: { immext({{.*}})
  35 # CHECK-NEXT:   call {{.*}} }
  36 # CHECK-NEXT: { r0 = memw(r0+#0x0) }
  37
  38 _start:
  39   r2 = add(pc,##_GLOBAL_OFFSET_TABLE_@PCREL)
  40   r0 = add(r2,##a@GDGOT)
  41   call a@GDPLT
  42   call ##a@GDPLT
  43   r0 = memw(r0+#0)
  44
  45 ## a is non-preemptible due to STV_HIDDEN visibility.
  46 ## We can achieve the same effect with -Bsymbolic.
  47 .section        .tdata,"awT",@progbits
  48 .globl  a
  49 .hidden a
  50 a:
  51 .word 1