lld/test/MachO/local-got.s

   1 # REQUIRES: x86
   2 # RUN: mkdir -p %t
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %p/Inputs/libhello.s \
   4 # RUN:   -o %t/libhello.o
   5 # RUN: %lld -lSystem -dylib -install_name \
   6 # RUN:   @executable_path/libhello.dylib %t/libhello.o -o %t/libhello.dylib
   7 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %s -o %t/test.o
   8
   9 # RUN: %lld -lSystem -o %t/test %t/test.o -L%t -lhello
  10 # RUN: llvm-objdump --macho --full-contents --rebase --bind %t/test | FileCheck %s --check-prefixes=CHECK,PIE --match-full-lines
  11 # RUN: %lld -no_pie -data_const -lSystem -o %t/test %t/test.o -L%t -lhello
  12 # RUN: llvm-objdump --macho --full-contents --rebase --bind %t/test | FileCheck %s --check-prefixes=CHECK,NO-PIE --match-full-lines
  13
  14 ## Check that the GOT references the cstrings. --full-contents displays the
  15 ## address offset and the contents at that address very similarly, so am using
  16 ## --match-full-lines to make sure we match on the right thing.
  17 # CHECK:      Contents of section __TEXT,__cstring:
  18 # CHECK-NEXT: 100000444 {{.*}}
  19
  20 ## 1st 8 bytes refer to the start of __cstring + 0xe, 2nd 8 bytes refer to the
  21 ## start of __cstring
  22 # CHECK:      Contents of section __DATA_CONST,__got:
  23 # CHECK-NEXT: [[#%X,ADDR:]]  52040000 01000000 44040000 01000000 {{.*}}
  24 # CHECK-NEXT: [[#ADDR + 16]] 00000000 00000000 {{.*}}
  25
  26 ## Check that the rebase table is empty.
  27 # NO-PIE:      Rebase table:
  28 # NO-PIE-NEXT: segment      section  address         type
  29
  30 # PIE:      Rebase table:
  31 # PIE-NEXT: segment      section  address          type
  32 # PIE-NEXT: __DATA_CONST __got    0x[[#%X,ADDR:]]  pointer
  33 # PIE-NEXT: __DATA_CONST __got    0x[[#ADDR + 8]]  pointer
  34
  35 ## Check that a non-locally-defined symbol is still bound at the correct offset:
  36 # CHECK-EMPTY:
  37 # CHECK-NEXT: Bind table:
  38 # CHECK-NEXT: segment      section  address         type     addend  dylib     symbol
  39 # CHECK-NEXT: __DATA_CONST __got    0x[[#ADDR+16]]  pointer  0       libhello  _hello_its_me
  40
  41 .globl _main
  42
  43 .text
  44 _main:
  45   movl $0x2000004, %eax # write() syscall
  46   mov $1, %rdi # stdout
  47   movq _hello_its_me@GOTPCREL(%rip), %rsi
  48   mov $15, %rdx # length of str
  49   syscall
  50
  51   movl $0x2000004, %eax # write() syscall
  52   mov $1, %rdi # stdout
  53 ## We use pushq/popq here instead of movq in order to avoid relaxation.
  54   pushq _hello_world@GOTPCREL(%rip)
  55   popq %rsi
  56   mov $13, %rdx # length of str
  57   syscall
  58
  59   movl $0x2000004, %eax # write() syscall
  60   mov $1, %rdi # stdout
  61   pushq _goodbye_world@GOTPCREL(%rip)
  62   popq %rsi
  63   mov $15, %rdx # length of str
  64   syscall
  65
  66   mov $0, %rax
  67   ret
  68
  69 .section __TEXT,__cstring
  70 _hello_world:
  71   .asciz "Hello world!\n"
  72
  73 _goodbye_world:
  74   .asciz "Goodbye world!\n"