llvm-project/lld/test/ELF/gnu-ifunc.s

// REQUIRES: x86
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
// RUN: ld.lld -static %t.o -o %tout
// RUN: llvm-objdump -d %tout | FileCheck %s --check-prefix=DISASM
// RUN: llvm-readobj -r -symbols -sections %tout | FileCheck %s

// CHECK:      Sections [
// CHECK:       Section {
// CHECK:       Index: 1
// CHECK-NEXT:  Name: .rela.plt
// CHECK-NEXT:  Type: SHT_RELA
// CHECK-NEXT:  Flags [
// CHECK-NEXT:    SHF_ALLOC
// CHECK-NEXT:  ]
// CHECK-NEXT:  Address: [[RELA:.*]]
// CHECK-NEXT:  Offset: 0x158
// CHECK-NEXT:  Size: 48
// CHECK-NEXT:  Link: 0
// CHECK-NEXT:  Info: [[GOTPLT:.*]]
// CHECK-NEXT:  AddressAlignment: 8
// CHECK-NEXT:  EntrySize: 24
// CHECK-NEXT: }
// CHECK:      Index: [[GOTPLT]]
// CHECK-NEXT: Name: .got.plt
// CHECK:      Relocations [
// CHECK-NEXT:   Section ({{.*}}) .rela.plt {
// CHECK-NEXT:     0x202000 R_X86_64_IRELATIVE
// CHECK-NEXT:     0x202008 R_X86_64_IRELATIVE
// CHECK-NEXT:   }
// CHECK-NEXT: ]
// CHECK:      Symbols [
// CHECK-NEXT:  Symbol {
// CHECK-NEXT:    Name:
// CHECK-NEXT:    Value: 0x0
// CHECK-NEXT:    Size: 0
// CHECK-NEXT:    Binding: Local
// CHECK-NEXT:    Type: None
// CHECK-NEXT:    Other: 0
// CHECK-NEXT:    Section: Undefined
// CHECK-NEXT:  }
// CHECK-NEXT:  Symbol {
// CHECK-NEXT:    Name: __rela_iplt_end
// CHECK-NEXT:    Value: 0x200188
// CHECK-NEXT:    Size: 0
// CHECK-NEXT:    Binding: Local
// CHECK-NEXT:    Type: None
// CHECK-NEXT:    Other [
// CHECK-NEXT:      STV_HIDDEN
// CHECK-NEXT:    ]
// CHECK-NEXT:    Section: .rela.plt
// CHECK-NEXT:  }
// CHECK-NEXT:  Symbol {
// CHECK-NEXT:    Name: __rela_iplt_start
// CHECK-NEXT:    Value: [[RELA]]
// CHECK-NEXT:    Size: 0
// CHECK-NEXT:    Binding: Local
// CHECK-NEXT:    Type: None
// CHECK-NEXT:    Other [
// CHECK-NEXT:      STV_HIDDEN
// CHECK-NEXT:    ]
// CHECK-NEXT:    Section: .rela.plt
// CHECK-NEXT:  }
// CHECK-NEXT:  Symbol {
// CHECK-NEXT:    Name: _start
// CHECK-NEXT:    Value: 0x201002
// CHECK-NEXT:    Size: 0
// CHECK-NEXT:    Binding: Global
// CHECK-NEXT:    Type: None
// CHECK-NEXT:    Other: 0
// CHECK-NEXT:    Section: .text
// CHECK-NEXT:  }
// CHECK-NEXT:  Symbol {
// CHECK-NEXT:    Name: bar
// CHECK-NEXT:    Value: 0x201001
// CHECK-NEXT:    Size: 0
// CHECK-NEXT:    Binding: Global
// CHECK-NEXT:    Type: GNU_IFunc
// CHECK-NEXT:    Other: 0
// CHECK-NEXT:    Section: .text
// CHECK-NEXT:  }
// CHECK-NEXT:  Symbol {
// CHECK-NEXT:    Name: foo
// CHECK-NEXT:    Value: 0x201000
// CHECK-NEXT:    Size: 0
// CHECK-NEXT:    Binding: Global
// CHECK-NEXT:    Type: GNU_IFunc
// CHECK-NEXT:    Other: 0
// CHECK-NEXT:    Section: .text
// CHECK-NEXT:  }
// CHECK-NEXT: ]

// DISASM: Disassembly of section .text:
// DISASM-NEXT: foo:
// DISASM-NEXT:  201000: {{.*}} retq
// DISASM:      bar:
// DISASM-NEXT:  201001: {{.*}} retq
// DISASM:      _start:
// DISASM-NEXT:  201002: {{.*}} callq 25
// DISASM-NEXT:  201007: {{.*}} callq 36
// DISASM-NEXT:  20100c: {{.*}} movl $2097496, %edx
// DISASM-NEXT:  201011: {{.*}} movl $2097544, %edx
// DISASM-NEXT:  201016: {{.*}} movl $2097545, %edx
// DISASM-NEXT: Disassembly of section .plt:
// DISASM-NEXT: .plt:
// DISASM-NEXT:  201020: {{.*}} jmpq *4058(%rip)
// DISASM-NEXT:  201026: {{.*}} pushq $0
// DISASM-NEXT:  20102b: {{.*}} jmp -32 <_start+0xe>
// DISASM-NEXT:  201030: {{.*}} jmpq *4050(%rip)
// DISASM-NEXT:  201036: {{.*}} pushq $1
// DISASM-NEXT:  20103b: {{.*}} jmp -48 <_start+0xe>

.text
.type foo STT_GNU_IFUNC
.globl foo
foo:
 ret

.type bar STT_GNU_IFUNC
.globl bar
bar:
 ret

.globl _start
_start:
 call foo
 call bar
 movl $__rela_iplt_start,%edx
 movl $__rela_iplt_end,%edx
 movl $__rela_iplt_end + 1,%edx