lld/test/ELF/x86-64-plt.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64 %p/Inputs/shared.s -o %t2.o
   4 # RUN: ld.lld -shared -soname=t2 %t2.o -o %t2.so
   5
   6 # RUN: ld.lld %t.o %t2.so -o %t
   7 # RUN: ld.lld -shared %t.o %t2.so -o %t.so
   8 # RUN: llvm-readelf -S -r %t | FileCheck %s --check-prefix=CHECK1
   9 # RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t | FileCheck %s --check-prefixes=DISASM,DISASM1
  10 # RUN: llvm-readelf -S -r %t.so | FileCheck %s --check-prefix=CHECK2
  11 # RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t.so | FileCheck %s --check-prefixes=DISASM,DISASM2
  12
  13 # CHECK1:      Name      Type     Address          Off    Size   ES Flg Lk Inf Al
  14 # CHECK1:      .plt      PROGBITS 00000000002012e0 0002e0 000030 00 AX   0   0 16
  15 # CHECK1:      .got.plt  PROGBITS 00000000002033e0 0003e0 000028 00 WA   0   0  8
  16 # CHECK1:      Relocation section '.rela.plt' at offset {{.*}} contains 2 entries:
  17 # CHECK1:      00000000002033f8 {{.*}} R_X86_64_JUMP_SLOT 0000000000000000 weak + 0
  18 # CHECK1-NEXT: 0000000000203400 {{.*}} R_X86_64_JUMP_SLOT 0000000000000000 bar + 0
  19
  20 # CHECK2:      Name      Type     Address          Off    Size   ES Flg Lk Inf Al
  21 # CHECK2:      .plt      PROGBITS 0000000000001310 000310 000030 00 AX   0   0 16
  22 # CHECK2:      .got.plt  PROGBITS 0000000000003400 000400 000028 00 WA   0   0  8
  23 # CHECK2:      Relocation section '.rela.plt' at offset {{.*}} contains 2 entries:
  24 # CHECK2:      0000000000003418 {{.*}} R_X86_64_JUMP_SLOT 0000000000000000 weak + 0
  25 # CHECK2-NEXT: 0000000000003420 {{.*}} R_X86_64_JUMP_SLOT 0000000000000000 bar + 0
  26
  27 # DISASM:       <_start>:
  28 # DISASM-NEXT:    callq {{.*}} <local>
  29 # DISASM-NEXT:    callq {{.*}} <bar@plt>
  30 # DISASM-NEXT:    jmp   {{.*}} <bar@plt>
  31 # DISASM-NEXT:    jmp   {{.*}} <weak@plt>
  32
  33 # DISASM1:      Disassembly of section .plt:
  34 # DISASM1-EMPTY:
  35 # DISASM1-NEXT: <.plt>:
  36 # DISASM1-NEXT: 2012e0:     pushq 8450(%rip)  # 0x2033e8
  37 # DISASM1-NEXT:             jmpq *8452(%rip)  # 0x2033f0
  38 # DISASM1-NEXT:             nopl (%rax)
  39 # DISASM1-EMPTY:
  40 # DISASM1-NEXT: <weak@plt>:
  41 # DISASM1-NEXT: 2012f0:     jmpq *8450(%rip)  # 0x2033f8
  42 # DISASM1-NEXT:             pushq $0
  43 # DISASM1-NEXT:             jmp 0x2012e0 <.plt>
  44 # DISASM1-EMPTY:
  45 # DISASM1-NEXT: <bar@plt>:
  46 # DISASM1-NEXT: 201300:     jmpq *8442(%rip)  # 0x203400
  47 # DISASM1-NEXT:             pushq $1
  48 # DISASM1-NEXT:             jmp 0x2012e0 <.plt>
  49 # DISASM1-NOT:  {{.}}
  50
  51 # DISASM2:      Disassembly of section .plt:
  52 # DISASM2-EMPTY:
  53 # DISASM2-NEXT: <.plt>:
  54 # DISASM2-NEXT:   1310:     pushq 8434(%rip)  # 0x3408
  55 # DISASM2-NEXT:             jmpq *8436(%rip)  # 0x3410
  56 # DISASM2-NEXT:             nopl (%rax)
  57 # DISASM2-EMPTY:
  58 # DISASM2-NEXT: <weak@plt>:
  59 # DISASM2-NEXT:   1320:     jmpq *8434(%rip)  # 0x3418
  60 # DISASM2-NEXT:             pushq $0
  61 # DISASM2-NEXT:             jmp 0x1310 <.plt>
  62 # DISASM2-EMPTY:
  63 # DISASM2-NEXT: <bar@plt>:
  64 # DISASM2-NEXT:   1330:     jmpq *8426(%rip)  # 0x3420
  65 # DISASM2-NEXT:             pushq $1
  66 # DISASM2-NEXT:             jmp 0x1310 <.plt>
  67 # DISASM2-NOT:  {{.}}
  68
  69 .global _start
  70 .weak weak
  71
  72 _start:
  73   call local
  74   call bar
  75   jmp bar@plt
  76   jmp weak
  77
  78 ## foo is local and non-preemptale, no PLT is generated.
  79 local:
  80   ret