lld/test/ELF/x86-64-gotpc-relax.s

   1 # REQUIRES: x86
   2 ## Test R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX GOT optimization.
   3
   4 # RUN: llvm-mc -filetype=obj -relax-relocations -triple=x86_64-unknown-linux %s -o %t.o
   5 # RUN: ld.lld %t.o -o %t1 --no-apply-dynamic-relocs
   6 # RUN: llvm-readelf -S -r -x .got.plt %t1 | FileCheck --check-prefixes=CHECK,NOAPPLY %s
   7 # RUN: ld.lld %t.o -o %t1 --apply-dynamic-relocs
   8 # RUN: llvm-readelf -S -r -x .got.plt %t1 | FileCheck --check-prefixes=CHECK,APPLY %s
   9 # RUN: ld.lld %t.o -o %t1
  10 # RUN: llvm-objdump --no-print-imm-hex -d %t1 | FileCheck --check-prefix=DISASM %s
  11
  12 ## --no-relax disables GOT optimization.
  13 # RUN: ld.lld --no-relax %t.o -o %t2
  14 # RUN: llvm-objdump --no-print-imm-hex -d %t2 | FileCheck --check-prefix=NORELAX %s
  15
  16 ## In our implementation, .got is retained even if all GOT-generating relocations are optimized.
  17 # CHECK:      Name              Type            Address          Off    Size   ES Flg Lk Inf Al
  18 # CHECK:      .iplt             PROGBITS        0000000000201280 000280 000010 00  AX  0   0 16
  19 # CHECK-NEXT: .got              PROGBITS        0000000000202290 000290 000000 00  WA  0   0  8
  20
  21 ## There is one R_X86_64_IRELATIVE relocations.
  22 # RELOC-LABEL: Relocation section '.rela.dyn' at offset {{.*}} contains 1 entry:
  23 # CHECK:           Offset             Info             Type               Symbol's Value  Symbol's Name + Addend
  24 # CHECK:       0000000000203290  0000000000000025 R_X86_64_IRELATIVE                        2011e2
  25 # CHECK-LABEL: Hex dump of section '.got.plt':
  26 # NOAPPLY-NEXT:  0x00203290 00000000 00000000
  27 # APPLY-NEXT:    0x00203290 e2112000 00000000
  28
  29 # 0x201173 + 7 - 10 = 0x201170
  30 # 0x20117a + 7 - 17 = 0x201170
  31 # 0x201181 + 7 - 23 = 0x201171
  32 # 0x201188 + 7 - 30 = 0x201171
  33 # DISASM:      Disassembly of section .text:
  34 # DISASM-EMPTY:
  35 # DISASM-NEXT: <foo>:
  36 # DISASM-NEXT:   2011e0: 90 nop
  37 # DISASM:      <hid>:
  38 # DISASM-NEXT:   2011e1: 90 nop
  39 # DISASM:      <ifunc>:
  40 # DISASM-NEXT:   2011e2: c3 retq
  41 # DISASM:      <_start>:
  42 # DISASM-NEXT: leaq -10(%rip), %rax
  43 # DISASM-NEXT: leaq -17(%rip), %rax
  44 # DISASM-NEXT: leaq -23(%rip), %rax
  45 # DISASM-NEXT: leaq -30(%rip), %rax
  46 # DISASM-NEXT: movq 8330(%rip), %rax
  47 # DISASM-NEXT: movq 8323(%rip), %rax
  48 # DISASM-NEXT: leaq -52(%rip), %rax
  49 # DISASM-NEXT: leaq -59(%rip), %rax
  50 # DISASM-NEXT: leaq -65(%rip), %rax
  51 # DISASM-NEXT: leaq -72(%rip), %rax
  52 # DISASM-NEXT: movq 8288(%rip), %rax
  53 # DISASM-NEXT: movq 8281(%rip), %rax
  54 # DISASM-NEXT: callq 0x2011e0 <foo>
  55 # DISASM-NEXT: callq 0x2011e0 <foo>
  56 # DISASM-NEXT: callq 0x2011e1 <hid>
  57 # DISASM-NEXT: callq 0x2011e1 <hid>
  58 # DISASM-NEXT: callq *8251(%rip)
  59 # DISASM-NEXT: callq *8245(%rip)
  60 # DISASM-NEXT: jmp   0x2011e0 <foo>
  61 # DISASM-NEXT: nop
  62 # DISASM-NEXT: jmp   0x2011e0 <foo>
  63 # DISASM-NEXT: nop
  64 # DISASM-NEXT: jmp   0x2011e1 <hid>
  65 # DISASM-NEXT: nop
  66 # DISASM-NEXT: jmp   0x2011e1 <hid>
  67 # DISASM-NEXT: nop
  68 # DISASM-NEXT: jmpq  *8215(%rip)
  69 # DISASM-NEXT: jmpq  *8209(%rip)
  70
  71 # NORELAX-LABEL: <_start>:
  72 # NORELAX-COUNT-12: movq
  73 # NORELAX-COUNT-6:  callq *
  74 # NORELAX-COUNT-6:  jmpq *
  75
  76 .text
  77 .globl foo
  78 .type foo, @function
  79 foo:
  80  nop
  81
  82 .globl hid
  83 .hidden hid
  84 .type hid, @function
  85 hid:
  86  nop
  87
  88 .text
  89 .type ifunc STT_GNU_IFUNC
  90 .globl ifunc
  91 .type ifunc, @function
  92 ifunc:
  93  ret
  94
  95 .globl _start
  96 .type _start, @function
  97 _start:
  98  movq foo@GOTPCREL(%rip), %rax
  99  movq foo@GOTPCREL(%rip), %rax
 100  movq hid@GOTPCREL(%rip), %rax
 101  movq hid@GOTPCREL(%rip), %rax
 102  movq ifunc@GOTPCREL(%rip), %rax
 103  movq ifunc@GOTPCREL(%rip), %rax
 104  movq foo@GOTPCREL(%rip), %rax
 105  movq foo@GOTPCREL(%rip), %rax
 106  movq hid@GOTPCREL(%rip), %rax
 107  movq hid@GOTPCREL(%rip), %rax
 108  movq ifunc@GOTPCREL(%rip), %rax
 109  movq ifunc@GOTPCREL(%rip), %rax
 110
 111  call *foo@GOTPCREL(%rip)
 112  call *foo@GOTPCREL(%rip)
 113  call *hid@GOTPCREL(%rip)
 114  call *hid@GOTPCREL(%rip)
 115  call *ifunc@GOTPCREL(%rip)
 116  call *ifunc@GOTPCREL(%rip)
 117  jmp *foo@GOTPCREL(%rip)
 118  jmp *foo@GOTPCREL(%rip)
 119  jmp *hid@GOTPCREL(%rip)
 120  jmp *hid@GOTPCREL(%rip)
 121  jmp *ifunc@GOTPCREL(%rip)
 122  jmp *ifunc@GOTPCREL(%rip)