1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
| // REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-linux %s -o %t.o
// RUN: ld.lld -fix-cortex-a53-843419 %t.o -o %t2
// RUN: llvm-objdump -triple=aarch64-linux-gnu -d %t2 | FileCheck %s
// The following code sequence is covered by the TLS IE to LE relaxation. It
// transforms the ADRP, LDR to MOVZ, MOVK. The former can trigger a
// cortex-a53-843419 patch, whereas the latter can not. As both
// relaxation and patching transform instructions very late in the
// link there is a possibility of them both being simultaneously
// applied. In this case the relaxed sequence is immune from the erratum so we
// prefer to keep it.
.text
.balign 4096
.space 4096 - 8
.globl _start
.type _start,@function
_start:
mrs x1, tpidr_el0
adrp x0, :gottprel:v
ldr x1, [x0, #:gottprel_lo12:v]
adrp x0, :gottprel:v
ldr x1, [x0, #:gottprel_lo12:v]
ret
// CHECK: _start:
// CHECK-NEXT: 211ff8: 41 d0 3b d5 mrs x1, TPIDR_EL0
// CHECK-NEXT: 211ffc: 00 00 a0 d2 movz x0, #0, lsl #16
// CHECK-NEXT: 212000: 01 02 80 f2 movk x1, #16
// CHECK-NEXT: 212004: 00 00 a0 d2 movz x0, #0, lsl #16
// CHECK-NEXT: 212008: 01 02 80 f2 movk x1, #16
// CHECK-NEXT: 21200c: c0 03 5f d6 ret
.type v,@object
.section .tbss,"awT",@nobits
.globl v
v:
.word 0
|