lld/test/ELF/shuffle-sections-init-fini.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o
   3
   4 # RUN: ld.lld -z norelro %t.o -o %t
   5 # RUN: llvm-readelf -x .init -x .fini -x .init_array -x .fini_array %t | \
   6 # RUN:   FileCheck --check-prefixes=CHECK,ORDERED %s
   7
   8 # RUN: ld.lld -z norelro %t.o --shuffle-sections '*=1' -o %t1
   9 # RUN: llvm-readelf -x .init -x .fini -x .init_array -x .fini_array %t1 | \
  10 # RUN:   FileCheck --check-prefixes=CHECK,SHUFFLED %s
  11
  12 ## .init and .fini rely on a particular order, e.g. crti.o crtbegin.o crtend.o crtn.o
  13 ## Don't shuffle them.
  14 # CHECK:      Hex dump of section '.init'
  15 # CHECK-NEXT: 00010203 04050607 08090a0b
  16
  17 # CHECK:      Hex dump of section '.fini'
  18 # CHECK-NEXT: 00010203 04050607 08090a0b
  19
  20 ## SHT_INIT_ARRAY/SHT_FINI_ARRAY with explicit priorities are still ordered.
  21 # CHECK:      Hex dump of section '.init_array'
  22 # CHECK-NEXT: 0x{{[0-9a-f]+}} ff
  23 # ORDERED-SAME: 000102 03040506 0708090a 0b
  24 # SHUFFLED-SAME: 070201 0006090a 040b0503 08
  25
  26 # CHECK:      Hex dump of section '.fini_array'
  27 # CHECK-NEXT: 0x{{[0-9a-f]+}} ff
  28 # ORDERED-SAME:  000102 03040506 0708090a 0b
  29 # SHUFFLED-SAME: 070008 0a040209 03010b06 05
  30
  31 ## With a SECTIONS command, SHT_INIT_ARRAY prirotities are ignored.
  32 ## All .init_array* are shuffled together.
  33 # RUN: echo 'SECTIONS { \
  34 # RUN:   .init_array : { *(.init_array*) } \
  35 # RUN:   .fini_array : { *(.fini_array*) }}' > %t.script
  36 # RUN: ld.lld -T %t.script %t.o -o %t2
  37 # RUN: llvm-readelf -x .init -x .fini -x .init_array -x .fini_array %t2 | \
  38 # RUN:   FileCheck --check-prefixes=CHECK2,ORDERED2 %s
  39 # RUN: ld.lld -T %t.script %t.o --shuffle-sections '*=1' -o %t3
  40 # RUN: llvm-readelf -x .init -x .fini -x .init_array -x .fini_array %t3 | \
  41 # RUN:   FileCheck --check-prefixes=CHECK2,SHUFFLED2 %s
  42
  43 # CHECK2:       Hex dump of section '.init_array'
  44 # ORDERED2-NEXT:  0x{{[0-9a-f]+}} 00010203 04050607 08090a0b ff
  45 # SHUFFLED2-NEXT: 0x{{[0-9a-f]+}} 07020100 06090a04 0b050308 ff
  46
  47 .irp i,0,1,2,3,4,5,6,7,8,9,10,11
  48   .section .init,"ax",@progbits,unique,\i
  49   .byte \i
  50   .section .fini,"ax",@progbits,unique,\i
  51   .byte \i
  52   .section .init_array,"aw",@init_array,unique,\i
  53   .byte \i
  54   .section .fini_array,"aw",@fini_array,unique,\i
  55   .byte \i
  56 .endr
  57
  58 .section .init_array.1,"aw",@init_array
  59 .byte 255
  60 .section .fini_array.1,"aw",@fini_array
  61 .byte 255