| // REQUIRES: x86 |
| |
| /// For non-preemptable ifunc, place ifunc PLT entries to the .iplt section. |
| |
| // 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 --print-imm-hex %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 PLTRELSZ tag does not include the IRELATIVE relocations |
| // CHECK: DynamicSection [ |
| // CHECK: 0x0000000000000008 RELASZ 72 (bytes) |
| // CHECK: 0x0000000000000002 PLTRELSZ 48 (bytes) |
| |
| /// Check that the IRELATIVE relocations are placed to the .rela.dyn section after |
| /// other regular relocations (e.g. GLOB_DAT). |
| // CHECK: Relocations [ |
| // CHECK-NEXT: Section (4) .rela.dyn { |
| // CHECK-NEXT: 0x202480 R_X86_64_GLOB_DAT bar3 0x0 |
| // CHECK-NEXT: 0x2034B0 R_X86_64_IRELATIVE - 0x201318 |
| // CHECK-NEXT: 0x2034B8 R_X86_64_IRELATIVE - 0x201319 |
| // CHECK-NEXT: } |
| // CHECK-NEXT: Section (5) .rela.plt { |
| // CHECK-NEXT: 0x2034A0 R_X86_64_JUMP_SLOT bar2 0x0 |
| // CHECK-NEXT: 0x2034A8 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: 203488 90232000 00000000 00000000 00000000 |
| // GOTPLT-NEXT: 203498 00000000 00000000 56132000 00000000 |
| // GOTPLT-NEXT: 2034a8 66132000 00000000 00000000 00000000 |
| // GOTPLT-NEXT: 2034b8 00000000 00000000 |
| |
| /// Check that we have 2 PLT sections: one regular .plt section and one |
| /// .iplt section for ifunc entries. |
| // DISASM: Disassembly of section .text: |
| // DISASM-EMPTY: |
| // DISASM-NEXT: <foo>: |
| // DISASM-NEXT: 201318: retq |
| // DISASM: <bar>: |
| // DISASM-NEXT: 201319: retq |
| // DISASM: <_start>: |
| // DISASM-NEXT: 20131a: callq 0x201370 |
| // DISASM-NEXT: 20131f: callq 0x201380 |
| // DISASM-NEXT: callq {{.*}} <bar2@plt> |
| // DISASM-NEXT: callq {{.*}} <zed2@plt> |
| // DISASM-NEXT: jmpq *0x114c(%rip) |
| // DISASM-EMPTY: |
| // DISASM-NEXT: Disassembly of section .plt: |
| // DISASM-EMPTY: |
| // DISASM-NEXT: <.plt>: |
| // DISASM-NEXT: 201340: pushq 0x214a(%rip) |
| // DISASM-NEXT: 201346: jmpq *0x214c(%rip) |
| // DISASM-NEXT: 20134c: nopl (%rax) |
| // DISASM-EMPTY: |
| // DISASM-NEXT: <bar2@plt>: |
| // DISASM-NEXT: 201350: jmpq *0x214a(%rip) |
| // DISASM-NEXT: 201356: pushq $0x0 |
| // DISASM-NEXT: 20135b: jmp 0x201340 <.plt> |
| // DISASM-EMPTY: |
| // DISASM-NEXT: <zed2@plt>: |
| // DISASM-NEXT: 201360: jmpq *0x2142(%rip) |
| // DISASM-NEXT: 201366: pushq $0x1 |
| // DISASM-NEXT: 20136b: jmp 0x201340 <.plt> |
| // DISASM-EMPTY: |
| // DISASM-NEXT: Disassembly of section .iplt: |
| // DISASM-EMPTY: |
| // DISASM-NEXT: <.iplt>: |
| // DISASM-NEXT: 201370: jmpq *0x213a(%rip) |
| // DISASM-NEXT: 201376: pushq $0x0 |
| // DISASM-NEXT: 20137b: jmp 0x201340 <.plt> |
| // DISASM-NEXT: 201380: jmpq *0x2132(%rip) |
| // DISASM-NEXT: 201386: pushq $0x1 |
| // DISASM-NEXT: 20138b: jmp 0x201340 <.plt> |
| |
| // Test that --shuffle-sections does not affect the order of relocations and that |
| // we still place IRELATIVE relocations last. Check both random seed (0) and an |
| // arbitrary seed that was known to break the order of relocations previously (3). |
| // RUN: ld.lld --shuffle-sections='*=3' %t.so %t.o -o %tout2 |
| // RUN: llvm-readobj --relocations %tout2 | FileCheck %s --check-prefix=SHUFFLE |
| // RUN: ld.lld --shuffle-sections='*=0' %t.so %t.o -o %tout3 |
| // RUN: llvm-readobj --relocations %tout3 | FileCheck %s --check-prefix=SHUFFLE |
| |
| // SHUFFLE: Section {{.*}} .rela.dyn { |
| // SHUFFLE-NEXT: R_X86_64_GLOB_DAT |
| // SHUFFLE-NEXT: R_X86_64_IRELATIVE |
| // SHUFFLE-NEXT: R_X86_64_IRELATIVE |
| // SHUFFLE-NEXT: } |
| |
| .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 |
| jmp *bar3@GOTPCREL(%rip) |