[lld] [LLD][COFF] Add support for custom DOS stub (PR #122561)

[via llvm-commits]

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@@ -0,0 +1,54 @@
+# RUN: yaml2obj %p/Inputs/ret42.yaml -o %t.obj
+
+# RUN: lld-link /out:%t.exe /entry:main /stub:%p/Inputs/stub64mz %t.obj
+# RUN: llvm-readobj --file-headers %t.exe | FileCheck -check-prefix=CHECK1 %s
+
+CHECK1: Magic: MZ
+CHECK1: UsedBytesInTheLastPage: 144
+CHECK1: FileSizeInPages: 3
+CHECK1: NumberOfRelocationItems: 0
+CHECK1: HeaderSizeInParagraphs: 4
+CHECK1: MinimumExtraParagraphs: 0
+CHECK1: MaximumExtraParagraphs: 65535
+CHECK1: InitialRelativeSS: 0
+CHECK1: InitialSP: 184
+CHECK1: Checksum: 0
+CHECK1: InitialIP: 0
+CHECK1: InitialRelativeCS: 0
+CHECK1: AddressOfRelocationTable: 64
+CHECK1: OverlayNumber: 0
+CHECK1: OEMid: 0
+CHECK1: OEMinfo: 0
+CHECK1: AddressOfNewExeHeader: 64
+
+## Invalid DOS signature (must be `MZ`)
+# RUN: not lld-link /out:%t.exe /entry:main /stub:%p/Inputs/stub64zz %t.obj 2>&1 | FileCheck -check-prefix=CHECK2 %s
+
+CHECK2: lld-link: error: /stub: invalid DOS signature: {{.*}}
+
+## Unlike MS linker, we accept non-8byte-aligned stubs and we add paddings ourselves
+# RUN: lld-link /out:%t.exe /entry:main /stub:%p/Inputs/stub64mz %t.obj
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kkent030315 wrote:

it was accidentally swapped to stub64mz instead of stub68mz. thanks for pointing out!

https://github.com/llvm/llvm-project/pull/122561