lld/test/ELF/ppc32-call-stub-nopic.s

   1 # REQUIRES: ppc
   2 # RUN: llvm-mc -filetype=obj -triple=powerpc %s -o %t.o
   3 # RUN: echo '.globl f, g, h; f: g: h:' | llvm-mc -filetype=obj -triple=powerpc - -o %t1.o
   4 # RUN: ld.lld -shared %t1.o -soname t1.so -o %t1.so
   5
   6 ## Check we can create PLT entries for -fno-PIE executable.
   7 # RUN: ld.lld %t.o %t1.so -o %t
   8 # RUN: llvm-readobj -r -d %t | FileCheck --check-prefix=RELOC %s
   9 # RUN: llvm-readelf -S %t | FileCheck --check-prefix=SEC %s
  10 # RUN: llvm-readelf -x .plt %t | FileCheck --check-prefix=HEX %s
  11 # RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s
  12
  13 # SEC:   .got PROGBITS 100202b8
  14 # RELOC: PPC_GOT 0x100202B8
  15
  16 # RELOC:      .rela.plt {
  17 # RELOC-NEXT:   0x100302C4 R_PPC_JMP_SLOT f 0x0
  18 # RELOC-NEXT:   0x100302C8 R_PPC_JMP_SLOT g 0x0
  19 # RELOC-NEXT: }
  20
  21 ## .got2+0x8000-0x10004 = 0x30000+0x8000-0x10004 = 65536*2+32764
  22 # CHECK-LABEL: <_start>:
  23 # CHECK-NEXT:    bl 0x100101d0
  24 # CHECK-NEXT:    bl 0x100101d0
  25 # CHECK-NEXT:    bl 0x100101e0
  26 # CHECK-NEXT:    bl 0x100101e0
  27 # CHECK-EMPTY:
  28
  29 ## -fno-PIC call stubs of f and g.
  30 ## .plt[0] = 0x100302c4 = 65536*4099+708
  31 ## .plt[1] = 0x100302c8 = 65536*4099+712
  32 # CHECK-NEXT:  <00000000.plt_call32.f>:
  33 # CHECK-NEXT:    lis 11, 4099
  34 # CHECK-NEXT:    lwz 11, 708(11)
  35 # CHECK-NEXT:    mtctr 11
  36 # CHECK-NEXT:    bctr
  37 # CHECK-EMPTY:
  38 # CHECK-NEXT:  <00000000.plt_call32.g>:
  39 # CHECK-NEXT:    lis 11, 4099
  40 # CHECK-NEXT:    lwz 11, 712(11)
  41 # CHECK-NEXT:    mtctr 11
  42 # CHECK-NEXT:    bctr
  43 # CHECK-EMPTY:
  44
  45 ## In Secure PLT ABI, .plt stores function pointers to first instructions of .glink
  46 # HEX: 0x100302c4 10010200 10010204
  47
  48 ## These instructions are referenced by .plt entries.
  49 # CHECK: 10010200 <.glink>:
  50 # CHECK-NEXT: b 0x10010208
  51 # CHECK-NEXT: b 0x10010208
  52
  53 ## PLTresolve
  54 ## Operands of lis & lwz: .got+4 = 0x10020070+4 = 65536*4098+700
  55 ## Operands of addis & addi: -.glink = -0x10010200 = 65536*-4097-512
  56 # CHECK-NEXT: lis 12, 4098
  57 # CHECK-NEXT: addis 11, 11, -4097
  58 # CHECK-NEXT: lwz 0, 700(12)
  59 # CHECK-NEXT: addi 11, 11, -512
  60
  61 # CHECK-NEXT: mtctr 0
  62 # CHECK-NEXT: add 0, 11, 11
  63 # CHECK-NEXT: lwz 12, 704(12)
  64 # CHECK-NEXT: add 11, 0, 11
  65 # CHECK-NEXT: bctr
  66
  67 ## glibc crti.o references _GLOBAL_OFFSET_TABLE_.
  68 .section .init
  69   bcl 20, 31, .+4
  70 .L:
  71   mflr 30
  72   addis 30, 30, _GLOBAL_OFFSET_TABLE_-.L@ha
  73   addi 30, 30, _GLOBAL_OFFSET_TABLE_-.L@l
  74
  75 .text
  76 .globl _start
  77 _start:
  78   bl f
  79   bl f
  80   bl g
  81   bl g