| // REQUIRES: x86 |
| // RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o |
| // RUN: ld.lld --hash-style=sysv --shared -o %t.so %t.o |
| // RUN: llvm-objdump -d %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-NEXT: fct: |
| // DISASM-NEXT: 1000: c3 retq |
| // DISASM: fct2: |
| // DISASM-NEXT: 1001: c3 retq |
| // DISASM: f1: |
| // DISASM-NEXT: 1002: e8 49 00 00 00 callq 73 |
| // DISASM-NEXT: 1007: e8 24 00 00 00 callq 36 |
| // DISASM-NEXT: 100c: e8 2f 00 00 00 callq 47 |
| // DISASM-NEXT: 1011: c3 retq |
| // DISASM: f2: |
| // DISASM-NEXT: 1012: c3 retq |
| // DISASM-NEXT: Disassembly of section .plt: |
| // DISASM-NEXT: .plt: |
| // DISASM-NEXT: 1020: ff 35 e2 0f 00 00 pushq 4066(%rip) |
| // DISASM-NEXT: 1026: ff 25 e4 0f 00 00 jmpq *4068(%rip) |
| // DISASM-NEXT: 102c: 0f 1f 40 00 nopl (%rax) |
| // DISASM-EMPTY: |
| // DISASM-NEXT: fct2@plt: |
| // DISASM-NEXT: 1030: ff 25 e2 0f 00 00 jmpq *4066(%rip) |
| // DISASM-NEXT: 1036: 68 00 00 00 00 pushq $0 |
| // DISASM-NEXT: 103b: e9 e0 ff ff ff jmp -32 <.plt> |
| // DISASM-EMPTY: |
| // DISASM-NEXT: f2@plt: |
| // DISASM-NEXT: 1040: ff 25 da 0f 00 00 jmpq *4058(%rip) |
| // DISASM-NEXT: 1046: 68 01 00 00 00 pushq $1 |
| // DISASM-NEXT: 104b: e9 d0 ff ff ff jmp -48 <.plt> |
| // DISASM-NEXT: 1050: ff 25 d2 0f 00 00 jmpq *4050(%rip) |
| // DISASM-NEXT: 1056: 68 00 00 00 00 pushq $0 |
| // DISASM-NEXT: 105b: e9 e0 ff ff ff jmp -32 <f2@plt> |
| |
| // CHECK: Relocations [ |
| // CHECK-NEXT: Section (4) .rela.plt { |
| // CHECK-NEXT: 0x2018 R_X86_64_JUMP_SLOT fct2 0x0 |
| // CHECK-NEXT: 0x2020 R_X86_64_JUMP_SLOT f2 0x0 |
| // CHECK-NEXT: 0x2028 R_X86_64_IRELATIVE - 0x1000 |
| |
| // 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 |
