aarch64-ifunc-bti.s
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# REQUIRES: aarch64
# RUN: llvm-mc -filetype=obj -triple=aarch64-none-linux-gnu %s -o %t.o
# RUN: llvm-mc -filetype=obj -triple=aarch64-none-linux-gnu %p/Inputs/aarch64-addrifunc.s -o %t1.o
# RUN: ld.lld --shared --soname=t1.so %t1.o -o %t1.so
# RUN: ld.lld --pie %t1.so %t.o -o %t
# RUN: llvm-objdump -d --no-show-raw-insn -mattr=+bti -triple=aarch64-linux-gnu %t | FileCheck %s
# When the address of an ifunc is taken using a non-got reference which clang
# can do, LLD exports a canonical PLT entry that may have its address taken so
# we must use bti c.
# CHECK: Disassembly of section .plt:
# CHECK: 0000000000010380 .plt:
# CHECK-NEXT: 10380: bti c
# CHECK-NEXT: stp x16, x30, [sp, #-16]!
# CHECK-NEXT: adrp x16, #131072
# CHECK-NEXT: ldr x17, [x16, #1272]
# CHECK-NEXT: add x16, x16, #1272
# CHECK-NEXT: br x17
# CHECK-NEXT: nop
# CHECK-NEXT: nop
# CHECK: 00000000000103a0 func1@plt:
# CHECK-NEXT: 103a0: bti c
# CHECK-NEXT: adrp x16, #131072
# CHECK-NEXT: ldr x17, [x16, #1280]
# CHECK-NEXT: add x16, x16, #1280
# CHECK-NEXT: br x17
# CHECK-NEXT: nop
# CHECK-EMPTY:
# CHECK: Disassembly of section .iplt:
# CHECK-EMPTY:
# CHECK-NEXT: 00000000000103c0 myfunc:
# CHECK-NEXT: 103c0: bti c
# CHECK-NEXT: adrp x16, #131072
# CHECK-NEXT: ldr x17, [x16, #1288]
# CHECK-NEXT: add x16, x16, #1288
# CHECK-NEXT: br x17
# CHECK-NEXT: nop
.section ".note.gnu.property", "a"
.long 4
.long 0x10
.long 0x5
.asciz "GNU"
.long 0xc0000000 // GNU_PROPERTY_AARCH64_FEATURE_1_AND
.long 4
.long 1 // GNU_PROPERTY_AARCH64_FEATURE_1_BTI
.long 0
.text
.globl myfunc
.type myfunc,@gnu_indirect_function
myfunc:
ret
.globl func1
.text
.globl _start
.type _start, %function
_start:
bl func1
adrp x8, myfunc
add x8, x8, :lo12:myfunc
ret