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We were previously ignoring weak externals during these searches (which are used for the entry point, exports, and subsystem inference), which differed from link.exe behavior. It also meant that we could get different behavior when linking an object file directly vs. packaging it into a static library, because static library symbol name directories include weak externals. Reviewed By: mstorsjo, yozhu Differential Revision: https://reviews.llvm.org/D139764
42 lines
1.6 KiB
ArmAsm
42 lines
1.6 KiB
ArmAsm
# REQUIRES: x86
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# RUN: rm -rf %t && split-file %s %t
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## Ensure that we resolve the entry point to the unmangled weak alias instead of
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## the mangled library definition (which would fail with an undefined symbol).
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# RUN: llvm-mc -triple x86_64-windows-msvc -filetype obj -o %t/entry-weak.obj %t/entry-weak.s
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# RUN: llvm-mc -triple x86_64-windows-msvc -filetype obj -o %t/entry-mangled.obj %t/entry-mangled.s
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# RUN: llvm-lib -out:%t/entry-mangled.lib %t/entry-mangled.obj
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# RUN: lld-link -subsystem:console -entry:entry -out:%t/entry-weak-external.exe %t/entry-weak.obj %t/entry-mangled.lib
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# RUN: llvm-readobj --file-headers %t/entry-weak-external.exe | FileCheck %s
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## Ensure that we don't resolve the entry point to a weak alias pointing to an
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## undefined symbol (which would have caused the entry point to be 0 instead of
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## an actual address). I can't think of a way of triggering this edge case
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## without using /force:unresolved, which means it likely doesn't matter in
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## practice, but we still match link.exe's behavior for it.
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# RUN: llvm-mc -triple x86_64-windows-msvc -filetype obj -o %t/entry-weak-undefined.obj %t/entry-weak-undefined.s
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# RUN: lld-link -subsystem:console -entry:entry -force:unresolved -out:%t/entry-undefined-weak-external.exe \
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# RUN: %t/entry-weak-undefined.obj %t/entry-mangled.lib
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# RUN: llvm-readobj --file-headers %t/entry-undefined-weak-external.exe | FileCheck %s
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# CHECK: AddressOfEntryPoint: 0x1000
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#--- entry-weak.s
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.globl default_entry
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default_entry:
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ret
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.weak entry
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entry = default_entry
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#--- entry-mangled.s
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.globl "?entry@@YAHXZ"
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"?entry@@YAHXZ":
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jmp does_not_exist
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#--- entry-weak-undefined.s
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.weak entry
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entry = does_not_exist
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