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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
| # REQUIRES: aarch64
# RUN: llvm-mc -filetype=obj -triple=aarch64-linux-gnu %s -o %t.o
# RUN: ld.lld %t.o -o %t
# RUN: llvm-objdump --no-show-raw-insn -d %t | FileCheck %s
# RUN: llvm-readobj --symbols %t | FileCheck --check-prefix=CHECK-SYM %s
## Test the the local exec relocations that map to:
## R_AARCH64_TLSLE_MOVW_TPREL_G2
## R_AARCH64_TLSLE_MOVW_TPREL_G1
## R_AARCH64_TLSLE_MOVW_TPREL_G1_NC
## R_AARCH64_TLSLE_MOVW_TPREL_G0
## R_AARCH64_TLSLE_MOVW_TPREL_G0_NC
## They calculate the same value as the other TPREL relocations, namely the
## offset from the thread pointer TP. The G0, G1 and G2 refer to partitions
## of the result with G2 bits [47:32], G1 bits [31:16] and G0 bits [15:0]
## the NC variant does not check for overflow.
## In AArch64 the structure of the TLS at runtime is:
## | TCB | Alignment Padding | TLS Block |
## With TP pointing to the start of the TCB. All offsets will be positive.
.text
## Access variable in first partition
movz x0, #:tprel_g0:v0
## TCB + 0 == 16
# CHECK: mov x0, #16
# CHECK-SYM: Name: v0
# CHECK-SYM-NEXT: Value: 0x0
## Access variable in second partition
movz x0, #:tprel_g1:v1
movk x0, #:tprel_g0_nc:v1
## TCB + 65536 across movz and movk
# CHECK-NEXT: mov x0, #65536
# CHECK-NEXT: movk x0, #16
# CHECK-SYM: Name: v1
# CHECK-SYM-NEXT: Value: 0x10000
## Access variable in third partition
movz x0, #:tprel_g2:v2
movk x0, #:tprel_g1_nc:v2
movk x0, #:tprel_g0_nc:v2
## TCB + 65536 + 4294967296 across movz and 2 movk instructions
# CHECK-NEXT: mov x0, #4294967296
# CHECK-NEXT: movk x0, #1, lsl #16
# CHECK-NEXT: movk x0, #16
# CHECK-SYM: Name: v2
# CHECK-SYM-NEXT: Value: 0x100010000
.section .tbss,"awT",@nobits
.balign 16
v0:
.quad 0
.space 0x10000 - 8
v1:
.quad 0
.space 0x100000000 - 8
v2:
.quad 0
|