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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-linux-gnu %s -o %t
// RUN: echo "SECTIONS { \
// RUN: .text_low : { *(.text_low) } \
// RUN: .text_high 0x10000000 : { *(.text_high) } \
// RUN: } " > %t.script
// RUN: ld.lld --script %t.script --shared %t -o %t2 2>&1
// RUN: llvm-objdump -d -triple=aarch64-linux-gnu %t2 | FileCheck %s
// Check that Position Independent thunks are generated for shared libraries.
.section .text_low, "ax", %progbits
.globl low_target
.type low_target, %function
low_target:
// Need thunk to high_target@plt
bl high_target
ret
// CHECK: low_target:
// CHECK-NEXT: 8: 04 00 00 94 bl #16
// CHECK-NEXT: c: c0 03 5f d6 ret
.hidden low_target2
.globl low_target2
.type low_target2, %function
low_target2:
// Need thunk to high_target
bl high_target2
ret
// CHECK: low_target2:
// CHECK-NEXT: 0: 05 00 00 94 bl #20
// CHECK-NEXT: 4: c0 03 5f d6 ret
// Expect range extension thunks for .text_low
// adrp calculation is (PC + signed immediate) & (!0xfff)
// CHECK: __AArch64ADRPThunk_high_target:
// CHECK-NEXT: e8: 10 00 08 90 adrp x16, #268435456
// CHECK-NEXT: ec: 10 02 01 91 add x16, x16, #64
// CHECK-NEXT: f0: 00 02 1f d6 br x16
// CHECK: __AArch64ADRPThunk_high_target2:
// CHECK-NEXT: f4: 10 00 08 90 adrp x16, #268435456
// CHECK-NEXT: f8: 10 22 00 91 add x16, x16, #8
// CHECK-NEXT: fc: 00 02 1f d6 br x16
.section .text_high, "ax", %progbits
.globl high_target
.type high_target, %function
high_target:
// No thunk needed as we can reach low_target@plt
bl low_target
ret
// CHECK: high_target:
// CHECK-NEXT: 10000000: 14 00 00 94 bl #80
// CHECK-NEXT: 10000004: c0 03 5f d6 ret
.hidden high_target2
.globl high_target2
.type high_target2, %function
high_target2:
// Need thunk to low_target
bl low_target2
ret
// CHECK: high_target2:
// CHECK-NEXT: 10000008: 02 00 00 94 bl #8
// CHECK-NEXT: 1000000c: c0 03 5f d6 ret
// Expect Thunk for .text.high
// CHECK: __AArch64ADRPThunk_low_target2:
// CHECK-NEXT: 10000010: 10 00 f8 90 adrp x16, #-268435456
// CHECK-NEXT: 10000014: 10 82 03 91 add x16, x16, #224
// CHECK-NEXT: 10000018: 00 02 1f d6 br x16
// CHECK: Disassembly of section .plt:
// CHECK-NEXT: .plt:
// CHECK-NEXT: 10000020: f0 7b bf a9 stp x16, x30, [sp, #-16]!
// CHECK-NEXT: 10000024: 10 00 00 90 adrp x16, #0
// CHECK-NEXT: 10000028: 11 3a 40 f9 ldr x17, [x16, #112]
// CHECK-NEXT: 1000002c: 10 c2 01 91 add x16, x16, #112
// CHECK-NEXT: 10000030: 20 02 1f d6 br x17
// CHECK-NEXT: 10000034: 1f 20 03 d5 nop
// CHECK-NEXT: 10000038: 1f 20 03 d5 nop
// CHECK-NEXT: 1000003c: 1f 20 03 d5 nop
// CHECK-NEXT: 10000040: 10 00 00 90 adrp x16, #0
// CHECK-NEXT: 10000044: 11 3e 40 f9 ldr x17, [x16, #120]
// CHECK-NEXT: 10000048: 10 e2 01 91 add x16, x16, #120
// CHECK-NEXT: 1000004c: 20 02 1f d6 br x17
// CHECK-NEXT: 10000050: 10 00 00 90 adrp x16, #0
// CHECK-NEXT: 10000054: 11 42 40 f9 ldr x17, [x16, #128]
// CHECK-NEXT: 10000058: 10 02 02 91 add x16, x16, #128
// CHECK-NEXT: 1000005c: 20 02 1f d6 br x17
|
