lld/test/ELF/ppc32-canonical-plt.s

   1 # REQUIRES: ppc
   2
   3 ## Test that we create canonical PLT entries for -no-pie.
   4
   5 # RUN: llvm-mc -filetype=obj -triple=powerpc %s -o %t.o
   6 # RUN: llvm-mc -filetype=obj -triple=powerpc %p/Inputs/canonical-plt-pcrel.s -o %t1.o
   7 # RUN: ld.lld %t1.o -o %t1.so -shared -soname=so
   8
   9 # RUN: ld.lld %t.o %t1.so -o %t
  10 # RUN: llvm-readobj -r %t | FileCheck --check-prefix=REL %s
  11 # RUN: llvm-readelf -S -s %t | FileCheck --check-prefix=SYM %s
  12 # RUN: llvm-readelf -x .plt %t | FileCheck --check-prefix=HEX %s
  13 # RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s
  14
  15 # REL:      Relocations [
  16 # REL-NEXT:   .rela.plt {
  17 # REL-NEXT:     0x10030318 R_PPC_JMP_SLOT func 0x0
  18 # REL-NEXT:     0x1003031C R_PPC_JMP_SLOT func2 0x0
  19 # REL-NEXT:     0x10030320 R_PPC_JMP_SLOT ifunc 0x0
  20 # REL-NEXT:   }
  21 # REL-NEXT: ]
  22
  23 # SYM: .glink PROGBITS 1001022c
  24
  25 ## st_value points to the canonical PLT entry in .glink
  26 # SYM: Symbol table '.dynsym'
  27 # SYM: 1001022c 0 FUNC GLOBAL DEFAULT UND func
  28 # SYM: 1001023c 0 FUNC GLOBAL DEFAULT UND func2
  29 # SYM: 1001024c 0 FUNC GLOBAL DEFAULT UND ifunc
  30 # SYM: Symbol table '.symtab'
  31 # SYM: 1001022c 0 FUNC GLOBAL DEFAULT UND func
  32 # SYM: 1001023c 0 FUNC GLOBAL DEFAULT UND func2
  33 # SYM: 1001024c 0 FUNC GLOBAL DEFAULT UND ifunc
  34
  35 # HEX: 0x10030318 1001025c 10010260 10010264
  36
  37 ## Canonical PLT entry of func.
  38 ## 0x10030318 = 65536*4099+792
  39 # CHECK:      1001022c <.glink>:
  40 # CHECK-NEXT:           lis 11, 4099
  41 # CHECK-NEXT:           lwz 11, 792(11)
  42 # CHECK-NEXT:           mtctr 11
  43 # CHECK-NEXT:           bctr
  44
  45 ## Canonical PLT entry of func2.
  46 ## 0x1003031C = 65536*4099+796
  47 # CHECK-NEXT: 1001023c: lis 11, 4099
  48 # CHECK-NEXT:           lwz 11, 796(11)
  49 # CHECK-NEXT:           mtctr 11
  50 # CHECK-NEXT:           bctr
  51
  52 ## Canonical PLT entry of ifunc.
  53 ## 0x10030320 = 65536*4099+800
  54 # CHECK-NEXT: 1001024c: lis 11, 4099
  55 # CHECK-NEXT:           lwz 11, 800(11)
  56 # CHECK-NEXT:           mtctr 11
  57 # CHECK-NEXT:           bctr
  58
  59 ## The 3 b instructions are referenced by .plt entries.
  60 # CHECK-NEXT: 1001025c: b 0x10010268
  61 # CHECK-NEXT:           b 0x10010268
  62 # CHECK-NEXT:           b 0x10010268
  63
  64 ## PLTresolve of 64 bytes is at the end.
  65 ## Operands of addis & addi: -0x1001025c = 65536*-4097-604
  66 # CHECK-NEXT:           lis 12, 0
  67 # CHECK-NEXT:           addis 11, 11, -4097
  68 # CHECK-NEXT:           lwz 0, 4(12)
  69 # CHECK-NEXT:           addi 11, 11, -604
  70 # CHECK-NEXT:           mtctr 0
  71 # CHECK-NEXT:           add 0, 11, 11
  72 # CHECK-NEXT:           lwz 12, 8(12)
  73 # CHECK-NEXT:           add 11, 0, 11
  74 # CHECK-NEXT:           bctr
  75 # CHECK-COUNT-7:        nop
  76
  77 .globl _start
  78 _start:
  79   b func
  80   lis 3, func2@ha
  81   la 3, func2@l(3)
  82   lis 3, func@ha
  83   la 3, func@l(3)
  84   lis 4, ifunc@ha
  85   la 4, ifunc@l(4)