343ffa70fc
For a weak symbol func in a comdat, the actual leader symbol ends up named like .weak.func.default*. Likewise, for stdcall on i386, the symbol may be named _func@4, while the section suffix only is "func", which the previous implementation didn't handle. This fixes unwinding through weak functions when using -ffunction-sections in mingw environments. Differential Revision: https://reviews.llvm.org/D84607
64 lines
2.0 KiB
ArmAsm
64 lines
2.0 KiB
ArmAsm
# REQUIRES: x86
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# RUN: llvm-mc -triple=x86_64-windows-gnu %s -filetype=obj -o %t.obj
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# RUN: llvm-readobj --symbols %t.obj | FileCheck %s --check-prefix=SYMBOL
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# RUN: lld-link -lldmingw -entry:main %t.obj -out:%t.exe -lldmap:%t.map -verbose
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# RUN: llvm-readobj --sections %t.exe | FileCheck %s
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# CHECK: Sections [
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# CHECK: Section {
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# CHECK: Number: 2
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# CHECK-LABEL: Name: .rdata (2E 72 64 61 74 61 00 00)
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# This is the critical check to show that .xdata$foo was
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# retained, while .xdata$bar wasn't. This *must* be 0x24
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# (0x4 for the .xdata section and 0x20 for the
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# .ctors/.dtors headers/ends).
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# CHECK-NEXT: VirtualSize: 0x24
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# Check that the weak symbols still are emitted as it was when the test was
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# written, to make sure the test still actually tests what was intended.
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# SYMBOL: Symbol {
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# SYMBOL: Name: foo
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# SYMBOL-NEXT: Value: 0
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# SYMBOL-NEXT: Section: IMAGE_SYM_UNDEFINED (0)
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# SYMBOL-NEXT: BaseType: Null (0x0)
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# SYMBOL-NEXT: ComplexType: Null (0x0)
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# SYMBOL-NEXT: StorageClass: WeakExternal (0x69)
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# SYMBOL-NEXT: AuxSymbolCount: 1
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# SYMBOL-NEXT: AuxWeakExternal {
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# SYMBOL-NEXT: Linked: .weak.foo.default.main (19)
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# SYMBOL-NEXT: Search: Alias (0x3)
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# SYMBOL-NEXT: }
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# SYMBOL-NEXT: }
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.text
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.globl main
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main:
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call foo
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retq
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# See associative-comdat-mingw.s for the general setup. Here, the leader
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# symbols are weak, which causes the functions foo and bar to be undefined
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# weak externals, while the actual leader symbols are named like
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# .weak.foo.default.main.
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.section .xdata$foo,"dr"
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.linkonce discard
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.long 42
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.section .xdata$bar,"dr"
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.linkonce discard
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.long 43
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.section .text$foo,"xr",discard,foo
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.weak foo
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foo:
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ret
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.section .text$bar,"xr",discard,bar
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.weak bar
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bar:
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ret
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