bolt/test/X86/pt_gnu_relro.s

   1 # REQUIRES: system-linux
   2
   3 # Check that BOLT recognizes PT_GNU_RELRO segment and marks respective sections
   4 # accordingly.
   5
   6 # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-linux %s -o %t.o -relax-relocations
   7 # RUN: ld.lld %t.o -o %t.exe -q --no-relax
   8 # RUN: llvm-readelf -We %t.exe | FileCheck --check-prefix=READELF %s
   9 # Unfortunately there's no direct way to extract a segment to section mapping
  10 # for a given section from readelf. Use the fool-proof way of matching
  11 # readelf output line-by-line.
  12 # READELF:      Program Headers:
  13 # READELF-NEXT: Type Offset {{.*}}
  14 # READELF-NEXT: PHDR
  15 # READELF-NEXT: LOAD
  16 # READELF-NEXT: LOAD
  17 # READELF-NEXT: LOAD
  18 # READELF-NEXT: GNU_RELRO
  19 # (GNU_RELRO is segment 4)
  20
  21 # READELF: Section to Segment mapping:
  22 # READELF: 04 .got
  23
  24 # RUN: llvm-bolt %t.exe --relocs -o /dev/null -v=1 \
  25 # RUN:   |& FileCheck --check-prefix=BOLT %s
  26 # BOLT: BOLT-INFO: marking .got as GNU_RELRO
  27
  28   .globl _start
  29   .type _start, %function
  30 _start:
  31   .cfi_startproc
  32   jmp *foo@GOTPCREL(%rip)
  33   ret
  34   .cfi_endproc
  35   .size _start, .-_start
  36
  37   .globl foo
  38   .type foo, %function
  39 foo:
  40   .cfi_startproc
  41   ret
  42   .cfi_endproc
  43   .size foo, .-foo