lld/test/ELF/ppc64-tls-vaddr-align.s

   1 # REQUIRES: ppc
   2
   3 # RUN: llvm-mc -filetype=obj -triple=powerpc64le %s -o %t.o
   4 # RUN: ld.lld %t.o -o %t
   5 # RUN: llvm-readelf -S -l %t | FileCheck --check-prefix=SEC %s
   6 # RUN: llvm-objdump -d %t | FileCheck --check-prefix=DIS %s
   7
   8 # SEC: Name   Type     Address          Off    Size   ES Flg Lk Inf Al
   9 # SEC: .tdata PROGBITS 0000000010020300 000300 000001 00 WAT 0    0  1
  10 # SEC: .tbss  NOBITS   0000000010020400 000301 000008 00 WAT 0    0 256
  11
  12 # SEC: Type Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
  13 # SEC: TLS  0x000300 0x0000000010020300 0x0000000010020300 0x000001 0x000108 R   0x100
  14
  15 ## We currently have a hack in Writer.cpp:fixSectionAlignments() to force
  16 ## p_vaddr(PT_TLS)%p_align(PT_TLS)=0, to work around bugs in some dynamic loaders.
  17
  18 ## p_vaddr rounded down to p_align has TP offset -0x7000.
  19 ## The first address of PT_TLS (p_vaddr) has TP offset (p_vaddr%p_align - 0x7000).
  20 ## Once we delete the hack, it is likely p_vaddr%p_align != 0.
  21
  22 ## a@tprel = st_value(a) + p_vaddr%p_align - 0x7000 = .tbss-.tdata + p_vaddr%p_align - 0x7000
  23 ## = 0x10020400-0x10020300 + 0 - 0x7000 = -28416
  24 # DIS: ld 3, -28416(13)
  25
  26 ld 3, a@tprel(13)
  27
  28 .section .tdata,"awT"
  29 .byte 0
  30
  31 .section .tbss,"awT"
  32 .p2align 8
  33 a:
  34 .quad 0