lld/test/ELF/pack-dyn-relocs-relr-loop.s

   1 # REQUIRES: aarch64
   2 # RUN: llvm-mc -filetype=obj -triple=aarch64 %s -o %t.o
   3 # RUN: ld.lld -pie --pack-dyn-relocs=relr -z max-page-size=4096 --verbose %t.o -o %t 2>&1 | FileCheck %s
   4 # RUN: llvm-readobj -r %t | FileCheck --check-prefix=RELR %s
   5
   6 ## This test makes sure we don't shrink .relr.dyn, otherwise its size may
   7 ## oscillate between 2 words and 3 words.
   8
   9 ## The test is very sensitive to the exact section sizes and offsets,
  10 ## make sure .data is located at a page boundary.
  11
  12 # CHECK: .relr.dyn needs 1 padding word(s)
  13
  14 # RELR:      .relr.dyn {
  15 # RELR-NEXT:   0x2F30 R_AARCH64_RELATIVE -
  16 # RELR-NEXT:   0x2F38 R_AARCH64_RELATIVE -
  17 # RELR-NEXT:   0x3000 R_AARCH64_RELATIVE -
  18 # RELR-NEXT: }
  19
  20 .section .data.rel.ro
  21 .align 3
  22 .space 0xcd0
  23 foo:
  24 ## Encoded by the first word of .relr.dyn
  25 .quad foo
  26
  27 ## Encoded by the second word of .relr.dyn
  28 .quad foo
  29
  30 .section .data
  31 .align 3
  32 ## If .data is at 0x3000, the relocation will be encoded by the second word.
  33 ## If we shrink .relr.dyn, the end of .dynamic will be at 0x2ff8 and .data
  34 ## will be at 0x3ff8, we will need the third word to encode this relocation,
  35 ## which will cause .relr.dyn to expand again.
  36 .quad foo