gnu-ifunc-shared.s
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// 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: 1308: retq
// DISASM: <fct2>:
// DISASM-NEXT: 1309: retq
// DISASM: <f1>:
// DISASM-NEXT: 130a: callq 0x1350
// DISASM-NEXT: 130f: callq 0x1330
// DISASM-NEXT: 1314: callq 0x1340
// DISASM-NEXT: 1319: retq
// DISASM: <f2>:
// DISASM-NEXT: 131a: retq
// DISASM-EMPTY:
// DISASM-NEXT: Disassembly of section .plt:
// DISASM-EMPTY:
// DISASM-NEXT: <.plt>:
// DISASM-NEXT: 1320: pushq 8482(%rip)
// DISASM-NEXT: 1326: jmpq *8484(%rip)
// DISASM-NEXT: 132c: nopl (%rax)
// DISASM-EMPTY:
// DISASM-NEXT: <fct2@plt>:
// DISASM-NEXT: 1330: jmpq *8482(%rip)
// DISASM-NEXT: 1336: pushq $0
// DISASM-NEXT: 133b: jmp 0x1320 <.plt>
// DISASM-EMPTY:
// DISASM-NEXT: <f2@plt>:
// DISASM-NEXT: 1340: jmpq *8474(%rip)
// DISASM-NEXT: 1346: pushq $1
// DISASM-NEXT: 134b: jmp 0x1320 <.plt>
// DISASM: Disassembly of section .iplt:
// DISASM-EMPTY:
// DISASM: <.iplt>:
// DISASM-NEXT: 1350: jmpq *8466(%rip)
// DISASM-NEXT: 1356: pushq $0
// DISASM-NEXT: 135b: jmp 0x1320 <.plt>
// CHECK: Relocations [
// CHECK-NEXT: Section (5) .rela.dyn {
// CHECK-NEXT: 0x3468 R_X86_64_IRELATIVE - 0x1308
// CHECK-NEXT: }
// CHECK-NEXT: Section (6) .rela.plt {
// CHECK-NEXT: 0x3458 R_X86_64_JUMP_SLOT fct2 0x0
// CHECK-NEXT: 0x3460 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