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
92
|
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-linux-gnu %S/Inputs/shared2.s -o %t1.o
// RUN: ld.lld %t1.o --shared -o %t.so
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-linux-gnu %s -o %t.o
// RUN: ld.lld --hash-style=sysv %t.so %t.o -o %tout
// RUN: llvm-objdump -d %tout | FileCheck %s --check-prefix=DISASM
// RUN: llvm-objdump -s %tout | FileCheck %s --check-prefix=GOTPLT
// RUN: llvm-readobj -r --dynamic-table %tout | FileCheck %s
// Check that the IRELATIVE relocations are after the JUMP_SLOT in the plt
// CHECK: Relocations [
// CHECK-NEXT: Section (4) .rela.plt {
// CHECK: 0x230018 R_AARCH64_JUMP_SLOT bar2 0x0
// CHECK-NEXT: 0x230020 R_AARCH64_JUMP_SLOT zed2 0x0
// CHECK-NEXT: 0x230028 R_AARCH64_IRELATIVE - 0x210000
// CHECK-NEXT: 0x230030 R_AARCH64_IRELATIVE - 0x210004
// CHECK-NEXT: }
// CHECK-NEXT: ]
// Check that .got.plt entries point back to PLT header
// GOTPLT: Contents of section .got.plt:
// GOTPLT-NEXT: 230000 00000000 00000000 00000000 00000000
// GOTPLT-NEXT: 230010 00000000 00000000 20002100 00000000
// GOTPLT-NEXT: 230020 20002100 00000000 20002100 00000000
// GOTPLT-NEXT: 230030 20002100 00000000
// Check that the PLTRELSZ tag includes the IRELATIVE relocations
// CHECK: DynamicSection [
// CHECK: 0x0000000000000002 PLTRELSZ 96 (bytes)
// Check that a PLT header is written and the ifunc entries appear last
// DISASM: Disassembly of section .text:
// DISASM-EMPTY:
// DISASM-NEXT: foo:
// DISASM-NEXT: 210000: {{.*}} ret
// DISASM: bar:
// DISASM-NEXT: 210004: {{.*}} ret
// DISASM: _start:
// DISASM-NEXT: 210008: {{.*}} bl #88
// DISASM-NEXT: 21000c: {{.*}} bl #100
// DISASM-NEXT: 210010: {{.*}} bl #48
// DISASM-NEXT: 210014: {{.*}} bl #60
// DISASM-EMPTY:
// DISASM-NEXT: Disassembly of section .plt:
// DISASM-EMPTY:
// DISASM-NEXT: .plt:
// DISASM-NEXT: 210020: {{.*}} stp x16, x30, [sp, #-16]!
// DISASM-NEXT: 210024: {{.*}} adrp x16, #131072
// DISASM-NEXT: 210028: {{.*}} ldr x17, [x16, #16]
// DISASM-NEXT: 21002c: {{.*}} add x16, x16, #16
// DISASM-NEXT: 210030: {{.*}} br x17
// DISASM-NEXT: 210034: {{.*}} nop
// DISASM-NEXT: 210038: {{.*}} nop
// DISASM-NEXT: 21003c: {{.*}} nop
// DISASM-EMPTY:
// DISASM-NEXT: bar2@plt:
// DISASM-NEXT: 210040: {{.*}} adrp x16, #131072
// DISASM-NEXT: 210044: {{.*}} ldr x17, [x16, #24]
// DISASM-NEXT: 210048: {{.*}} add x16, x16, #24
// DISASM-NEXT: 21004c: {{.*}} br x17
// DISASM-EMPTY:
// DISASM-NEXT: zed2@plt:
// DISASM-NEXT: 210050: {{.*}} adrp x16, #131072
// DISASM-NEXT: 210054: {{.*}} ldr x17, [x16, #32]
// DISASM-NEXT: 210058: {{.*}} add x16, x16, #32
// DISASM-NEXT: 21005c: {{.*}} br x17
// DISASM-NEXT: 210060: {{.*}} adrp x16, #131072
// DISASM-NEXT: 210064: {{.*}} ldr x17, [x16, #40]
// DISASM-NEXT: 210068: {{.*}} add x16, x16, #40
// DISASM-NEXT: 21006c: {{.*}} br x17
// DISASM-NEXT: 210070: {{.*}} adrp x16, #131072
// DISASM-NEXT: 210074: {{.*}} ldr x17, [x16, #48]
// DISASM-NEXT: 210078: {{.*}} add x16, x16, #48
// DISASM-NEXT: 21007c: {{.*}} br x17
.text
.type foo STT_GNU_IFUNC
.globl foo
foo:
ret
.type bar STT_GNU_IFUNC
.globl bar
bar:
ret
.globl _start
_start:
bl foo
bl bar
bl bar2
bl zed2
|
