gnu-ifunc.s
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// 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.dyn
// 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.dyn {
// CHECK-NEXT: 0x2021D0 R_X86_64_IRELATIVE
// CHECK-NEXT: 0x2021D8 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.dyn
// 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.dyn
// CHECK-NEXT: }
// CHECK-NEXT: Symbol {
// CHECK-NEXT: Name: _start
// CHECK-NEXT: Value: 0x20118A
// 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: 0x201189
// 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: 0x201188
// 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-EMPTY:
// DISASM-NEXT: foo:
// DISASM-NEXT: 201188: {{.*}} retq
// DISASM: bar:
// DISASM-NEXT: 201189: {{.*}} retq
// DISASM: _start:
// DISASM-NEXT: 20118a: {{.*}} callq 33
// DISASM-NEXT: 20118f: {{.*}} callq 44
// DISASM-NEXT: 201194: {{.*}} movl $2097496, %edx
// DISASM-NEXT: 201199: {{.*}} movl $2097544, %edx
// DISASM-NEXT: 20119e: {{.*}} movl $2097545, %edx
// DISASM-EMPTY:
// DISASM-NEXT: Disassembly of section .iplt:
// DISASM-EMPTY:
// DISASM-NEXT: .iplt:
// DISASM-NEXT: 2011b0: {{.*}} jmpq *4122(%rip)
// DISASM-NEXT: 2011b6: {{.*}} pushq $0
// DISASM-NEXT: 2011bb: {{.*}} jmp -2101696
// DISASM-NEXT: 2011c0: {{.*}} jmpq *4114(%rip)
// DISASM-NEXT: 2011c6: {{.*}} pushq $1
// DISASM-NEXT: 2011cb: {{.*}} jmp -2101712
.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