| // REQUIRES: x86 |
| |
| /// For non-preemptable ifunc, place ifunc PLT entries after regular PLT entries. |
| |
| // RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %S/Inputs/shared2-x86-64.s -o %t1.o |
| // RUN: ld.lld %t1.o --shared -soname=so -o %t.so |
| // RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o |
| // RUN: ld.lld --hash-style=sysv %t.so %t.o -o %tout |
| // RUN: llvm-objdump -d --no-show-raw-insn %tout | FileCheck %s --check-prefix=DISASM |
| // RUN: llvm-objdump -s %tout | FileCheck %s --check-prefix=GOTPLT |
| // RUN: llvm-readobj -r --dynamic-table %tout | FileCheck %s |
| |
| // Check that the IRELATIVE relocations are after the JUMP_SLOT in the plt |
| // CHECK: Relocations [ |
| // CHECK-NEXT: Section (4) .rela.dyn { |
| // CHECK-NEXT: 0x203458 R_X86_64_IRELATIVE - 0x2012D8 |
| // CHECK-NEXT: 0x203460 R_X86_64_IRELATIVE - 0x2012D9 |
| // CHECK-NEXT: } |
| // CHECK-NEXT: Section (5) .rela.plt { |
| // CHECK-NEXT: 0x203448 R_X86_64_JUMP_SLOT bar2 0x0 |
| // CHECK-NEXT: 0x203450 R_X86_64_JUMP_SLOT zed2 0x0 |
| // CHECK-NEXT: } |
| |
| // Check that .got.plt entries point back to PLT header |
| // GOTPLT: Contents of section .got.plt: |
| // GOTPLT-NEXT: 203430 40232000 00000000 00000000 00000000 |
| // GOTPLT-NEXT: 203440 00000000 00000000 06132000 00000000 |
| // GOTPLT-NEXT: 203450 16132000 00000000 26132000 00000000 |
| // GOTPLT-NEXT: 203460 36132000 00000000 |
| |
| // Check that the PLTRELSZ tag does not include the IRELATIVE relocations |
| // CHECK: DynamicSection [ |
| // CHECK: 0x0000000000000008 RELASZ 48 (bytes) |
| // CHECK: 0x0000000000000002 PLTRELSZ 48 (bytes) |
| |
| // Check that a PLT header is written and the ifunc entries appear last |
| // DISASM: Disassembly of section .text: |
| // DISASM-EMPTY: |
| // DISASM-NEXT: foo: |
| // DISASM-NEXT: 2012d8: retq |
| // DISASM: bar: |
| // DISASM-NEXT: 2012d9: retq |
| // DISASM: _start: |
| // DISASM-NEXT: 2012da: callq 65 |
| // DISASM-NEXT: 2012df: callq 76 |
| // DISASM-NEXT: callq {{.*}} <bar2@plt> |
| // DISASM-NEXT: callq {{.*}} <zed2@plt> |
| // DISASM-EMPTY: |
| // DISASM-NEXT: Disassembly of section .plt: |
| // DISASM-EMPTY: |
| // DISASM-NEXT: .plt: |
| // DISASM-NEXT: 2012f0: pushq 8514(%rip) |
| // DISASM-NEXT: 2012f6: jmpq *8516(%rip) |
| // DISASM-NEXT: 2012fc: nopl (%rax) |
| // DISASM-EMPTY: |
| // DISASM-NEXT: bar2@plt: |
| // DISASM-NEXT: 201300: jmpq *8514(%rip) |
| // DISASM-NEXT: 201306: pushq $0 |
| // DISASM-NEXT: 20130b: jmp -32 <.plt> |
| // DISASM-EMPTY: |
| // DISASM-NEXT: zed2@plt: |
| // DISASM-NEXT: 201310: jmpq *8506(%rip) |
| // DISASM-NEXT: 201316: pushq $1 |
| // DISASM-NEXT: 20131b: jmp -48 <.plt> |
| // DISASM-NEXT: 201320: jmpq *8498(%rip) |
| // DISASM-NEXT: 201326: pushq $0 |
| // DISASM-NEXT: 20132b: jmp -32 <zed2@plt> |
| // DISASM-NEXT: 201330: jmpq *8490(%rip) |
| // DISASM-NEXT: 201336: pushq $1 |
| // DISASM-NEXT: 20133b: jmp -48 <zed2@plt> |
| |
| .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 |
| call bar2 |
| call zed2 |
