| // REQUIRES: x86 |
| |
| /// For non-preemptable ifunc, place ifunc PLT entries after regular PLT entries. |
| |
| // RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o |
| // RUN: ld.lld --shared -o %t.so %t.o |
| // RUN: llvm-objdump -d --no-show-raw-insn %t.so | FileCheck %s --check-prefix=DISASM |
| // RUN: llvm-readobj -r %t.so | FileCheck %s |
| |
| // Check that an IRELATIVE relocation is used for a non-preemptible ifunc |
| // handler and a JUMP_SLOT is used for a preemptible ifunc |
| // DISASM: Disassembly of section .text: |
| // DISASM-EMPTY: |
| // DISASM-NEXT: fct: |
| // DISASM-NEXT: 1000: retq |
| // DISASM: fct2: |
| // DISASM-NEXT: 1001: retq |
| // DISASM: f1: |
| // DISASM-NEXT: 1002: callq 73 |
| // DISASM-NEXT: 1007: callq 36 |
| // DISASM-NEXT: 100c: callq 47 |
| // DISASM-NEXT: 1011: retq |
| // DISASM: f2: |
| // DISASM-NEXT: 1012: retq |
| // DISASM-EMPTY: |
| // DISASM-NEXT: Disassembly of section .plt: |
| // DISASM-EMPTY: |
| // DISASM-NEXT: .plt: |
| // DISASM-NEXT: 1020: pushq 8162(%rip) |
| // DISASM-NEXT: 1026: jmpq *8164(%rip) |
| // DISASM-NEXT: 102c: nopl (%rax) |
| // DISASM-EMPTY: |
| // DISASM-NEXT: fct2@plt: |
| // DISASM-NEXT: 1030: jmpq *8162(%rip) |
| // DISASM-NEXT: 1036: pushq $0 |
| // DISASM-NEXT: 103b: jmp -32 <.plt> |
| // DISASM-EMPTY: |
| // DISASM-NEXT: f2@plt: |
| // DISASM-NEXT: 1040: jmpq *8154(%rip) |
| // DISASM-NEXT: 1046: pushq $1 |
| // DISASM-NEXT: 104b: jmp -48 <.plt> |
| // DISASM-NEXT: 1050: jmpq *8146(%rip) |
| // DISASM-NEXT: 1056: pushq $0 |
| // DISASM-NEXT: 105b: jmp -32 <f2@plt> |
| |
| // CHECK: Relocations [ |
| // CHECK-NEXT: Section (5) .rela.dyn { |
| // CHECK-NEXT: 0x3028 R_X86_64_IRELATIVE - 0x1000 |
| // CHECK-NEXT: } |
| // CHECK-NEXT: Section (6) .rela.plt { |
| // CHECK-NEXT: 0x3018 R_X86_64_JUMP_SLOT fct2 0x0 |
| // CHECK-NEXT: 0x3020 R_X86_64_JUMP_SLOT f2 0x0 |
| // CHECK-NEXT: } |
| |
| // Hidden expect IRELATIVE |
| .globl fct |
| .hidden fct |
| .type fct, STT_GNU_IFUNC |
| fct: |
| ret |
| |
| // Not hidden expect JUMP_SLOT |
| .globl fct2 |
| .type fct2, STT_GNU_IFUNC |
| fct2: |
| ret |
| |
| .globl f1 |
| .type f1, @function |
| f1: |
| call fct |
| call fct2 |
| call f2@PLT |
| ret |
| |
| .globl f2 |
| .type f2, @function |
| f2: |
| ret |
