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: x86
# RUN: llvm-mc -triple=x86_64-windows-gnu %s -filetype=obj -o %t.obj
# RUN: llvm-readobj --symbols %t.obj | FileCheck %s --check-prefix=SYMBOL
# RUN: lld-link -lldmingw -entry:main %t.obj -out:%t.exe -lldmap:%t.map -verbose
# RUN: llvm-readobj --sections %t.exe | FileCheck %s
# CHECK: Sections [
# CHECK: Section {
# CHECK: Number: 2
# CHECK-LABEL: Name: .rdata (2E 72 64 61 74 61 00 00)
# This is the critical check to show that .xdata$foo was
# retained, while .xdata$bar wasn't. This *must* be 0x24
# (0x4 for the .xdata section and 0x20 for the
# .ctors/.dtors headers/ends).
# CHECK-NEXT: VirtualSize: 0x24
# Check that the weak symbols still are emitted as it was when the test was
# written, to make sure the test still actually tests what was intended.
# SYMBOL: Symbol {
# SYMBOL: Name: foo
# SYMBOL-NEXT: Value: 0
# SYMBOL-NEXT: Section: IMAGE_SYM_UNDEFINED (0)
# SYMBOL-NEXT: BaseType: Null (0x0)
# SYMBOL-NEXT: ComplexType: Null (0x0)
# SYMBOL-NEXT: StorageClass: WeakExternal (0x69)
# SYMBOL-NEXT: AuxSymbolCount: 1
# SYMBOL-NEXT: AuxWeakExternal {
# SYMBOL-NEXT: Linked: .weak.foo.default.main (19)
# SYMBOL-NEXT: Search: Alias (0x3)
# SYMBOL-NEXT: }
# SYMBOL-NEXT: }
.text
.globl main
main:
call foo
retq
# See associative-comdat-mingw.s for the general setup. Here, the leader
# symbols are weak, which causes the functions foo and bar to be undefined
# weak externals, while the actual leader symbols are named like
# .weak.foo.default.main.
.section .xdata$foo,"dr"
.linkonce discard
.long 42
.section .xdata$bar,"dr"
.linkonce discard
.long 43
.section .text$foo,"xr",discard,foo
.weak foo
foo:
ret
.section .text$bar,"xr",discard,bar
.weak bar
bar:
ret
|
