llvm/test/tools/llvm-objdump/X86/plt-got.test

   1 ## If a symbol needing a PLT entry also needs a GLOB_DAT relocation, GNU ld's
   2 ## x86 port places the PLT entry in .plt.got, relocated by a GLOB_DAT. The
   3 ## JUMP_SLOT relocation is unused in this case.
   4 ## Test that we synthesize @plt symbols for such PLT entries.
   5 # RUN: yaml2obj --docnum=1 %s -o %t.x86-64
   6 # RUN: llvm-objdump -d %t.x86-64 | FileCheck %s --check-prefix=64
   7 # RUN: yaml2obj --docnum=2 %s -o %t.x86-32
   8 # RUN: llvm-objdump -d %t.x86-32 | FileCheck %s --check-prefix=32
   9
  10 # 64:      Disassembly of section .plt:
  11 # 64-EMPTY:
  12 # 64-NEXT: <.plt>:
  13 # 64:      <foo1@plt>:
  14 # 64:      <foo0@plt>:
  15
  16 # 64:      Disassembly of section .plt.got:
  17 # 64-EMPTY:
  18 # 64-NEXT: <combined0@plt>:
  19 # 64:      <combined1@plt>:
  20
  21 # 64:      <_start>:
  22 # 64-NEXT:   movq    {{.*}}(%rip), %rax
  23 # 64-NEXT:   movq    {{.*}}(%rip), %rax
  24 # 64-NEXT:   callq   {{.*}} <combined0@plt>
  25 # 64-NEXT:   callq   {{.*}} <combined1@plt>
  26 # 64-NEXT:   callq   {{.*}} <foo0@plt>
  27 # 64-NEXT:   callq   {{.*}} <foo1@plt>
  28
  29 # 32:      Disassembly of section .plt:
  30 # 32-EMPTY:
  31 # 32-NEXT: <.plt>:
  32 # 32:      <foo1@plt>:
  33 # 32:      <foo0@plt>:
  34
  35 # 32:      Disassembly of section .plt.got:
  36 # 32-EMPTY:
  37 # 32-NEXT: <combined0@plt>:
  38 # 32:      <combined1@plt>:
  39
  40 # 32:      <_start>:
  41 # 32-NEXT:   movl    -0x8(%eax), %eax
  42 # 32-NEXT:   movl    -0x4(%eax), %eax
  43 # 32-NEXT:   calll   {{.*}} <combined0@plt>
  44 # 32-NEXT:   calll   {{.*}} <combined1@plt>
  45 # 32-NEXT:   calll   {{.*}} <foo0@plt>
  46 # 32-NEXT:   calll   {{.*}} <foo1@plt>
  47
  48 ## %t.x86-64 is linked with ld.bfd -pie -z now a.o b.so and
  49 ## doesn't have .got.plt.
  50 ## %t.x86-32 is linked with ld.bfd -pie -z lazy a.o b.so and
  51 ## has .got.plt.
  52
  53 ## a.s
  54 ## .globl _start; _start:
  55 ## mov combined0@gotpcrel(%rip), %rax  # movl combined0@GOT(%eax), %eax  for x86-32
  56 ## mov combined1@gotpcrel(%rip), %rax  # movl combined1@GOT(%eax), %eax  for x86-32
  57 ## call combined0@plt
  58 ## call combined1@plt
  59 ## call foo0@plt
  60 ## call foo1@plt
  61
  62 ## b.s
  63 ## .globl foo0, foo1, combined0, combined1
  64 ## foo0: foo1: combined0: combined1:
  65
  66 --- !ELF
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  70   Type:            ET_DYN
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  75     Type:            SHT_RELA
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  78     Link:            .dynsym
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  85         Symbol:          combined1
  86         Type:            R_X86_64_GLOB_DAT
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 135   - Name:            foo1
 136     Binding:         STB_GLOBAL
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 139   - Name:            combined0
 140     Binding:         STB_GLOBAL
 141   - Name:            combined1
 142     Binding:         STB_GLOBAL
 143 ...
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 156     Address:         0x218
 157     Link:            .dynsym
 158     AddressAlign:    0x4
 159     Relocations:
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 161         Symbol:          combined0
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 230     Binding:         STB_GLOBAL
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 232     Binding:         STB_GLOBAL
 233 ...