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
|
// REQUIRES: arm
// RUN: llvm-mc -filetype=obj --arm-add-build-attributes -triple=armv7a-none-linux-gnueabi %s -o %t
// RUN: ld.lld --emit-relocs %t -o %t2
// RUN: llvm-objdump -s --triple=armv7a-none-linux-gnueabi %t2 | FileCheck %s
// RUN: llvm-readelf --relocs %t2 | FileCheck -check-prefix=CHECK-RELOCS %s
// LLD does not support --emit-relocs for .ARM.exidx sections as the relocations
// from synthetic table entries won't be represented. Given the known use cases
// of --emit-relocs, relocating kernels, and binary analysis, the former doesn't
// use exceptions and the latter can derive the relocations from the table if
// they need them.
.syntax unified
// Will produce an ARM.exidx entry with inline unwinding instructions
.section .text.func1, "ax",%progbits
.global func1
func1:
.fnstart
bx lr
.save {r7, lr}
.setfp r7, sp, #0
.fnend
.syntax unified
.section .text.func2, "ax",%progbits
// A function with the same inline unwinding instructions, expect merge.
.global func2
func2:
.fnstart
bx lr
.save {r7, lr}
.setfp r7, sp, #0
.fnend
.section .text.25, "ax", %progbits
.global func25
func25:
.fnstart
bx lr
.cantunwind
.fnend
.section .text.26, "ax", %progbits
.global func26
func26:
.fnstart
bx lr
.cantunwind
.fnend
.syntax unified
.section .text.func3, "ax",%progbits
// A function with the same inline unwinding instructions, expect merge.
.global func3
func3:
.fnstart
bx lr
.save {r7, lr}
.setfp r7, sp, #0
.fnend
.section .text.__aeabi_unwind_cpp_pr0, "ax", %progbits
.global __aeabi_unwind_cpp_pr0
__aeabi_unwind_cpp_pr0:
bx lr
// CHECK: Contents of section .ARM.exidx:
// CHECK-NEXT: 100d4 28100000 08849780 28100000 01000000
// CHECK-NEXT: 100e4 28100000 08849780 24100000 01000000
// CHECK-NEXT: 100f4 20100000 01000000
// CHECK-RELOCS-NOT: Relocation section '.rel.ARM.exidx'
|
