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llvm-project/lld/test/COFF/delayimports.test

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COFF: Support delay-load import tables. DLLs are usually resolved at process startup, but you can delay-load them by passing /delayload option to the linker. If a /delayload is specified, the linker has to create data which is similar to regular import table. One notable difference is that the pointers in a delay-load import table are originally pointing to thunks that resolves themselves. Each thunk loads a DLL, resolve its name, and then overwrites the pointer with the result so that subsequent function calls directly call a desired function. The linker has to emit thunks. llvm-svn: 240250
2015-06-22 06:31:52 +08:00
# RUN: lld -flavor link2 /out:%t.exe /entry:main /subsystem:console \
# RUN: %p/Inputs/hello64.obj %p/Inputs/std64.lib /delayload:std64.dll \
# RUN: /alternatename:__delayLoadHelper2=main
COFF: Add base relocation for delay-import table. Because the address table of the delay-import table contains absolute address, it needs to be added to the base relocation table. llvm-svn: 240844
2015-06-27 06:05:32 +08:00
# RUN: llvm-readobj -coff-imports %t.exe | FileCheck -check-prefix=IMPORT %s
# RUN: llvm-readobj -coff-basereloc %t.exe | FileCheck -check-prefix=BASEREL %s
COFF: Support delay-load import tables. DLLs are usually resolved at process startup, but you can delay-load them by passing /delayload option to the linker. If a /delayload is specified, the linker has to create data which is similar to regular import table. One notable difference is that the pointers in a delay-load import table are originally pointing to thunks that resolves themselves. Each thunk loads a DLL, resolve its name, and then overwrites the pointer with the result so that subsequent function calls directly call a desired function. The linker has to emit thunks. llvm-svn: 240250
2015-06-22 06:31:52 +08:00
COFF: Add base relocation for delay-import table. Because the address table of the delay-import table contains absolute address, it needs to be added to the base relocation table. llvm-svn: 240844
2015-06-27 06:05:32 +08:00
IMPORT: DelayImport {
IMPORT-NEXT: Name: std64.dll
IMPORT-NEXT: Attributes: 0x1
IMPORT-NEXT: ModuleHandle: 0x1018
IMPORT-NEXT: ImportAddressTable: 0x1020
IMPORT-NEXT: ImportNameTable: 0x3040
IMPORT-NEXT: BoundDelayImportTable: 0x0
IMPORT-NEXT: UnloadDelayImportTable: 0x0
IMPORT-NEXT: Import {
IMPORT-NEXT: Symbol: ExitProcess (0)
IMPORT-NEXT: Address: 0x140002066
IMPORT-NEXT: }
IMPORT-NEXT: Import {
IMPORT-NEXT: Symbol: (50)
IMPORT-NEXT: Address: 0x1400020BD
IMPORT-NEXT: }
IMPORT-NEXT: Import {
IMPORT-NEXT: Symbol: MessageBoxA (1)
IMPORT-NEXT: Address: 0x140002114
IMPORT-NEXT: }
IMPORT-NEXT: }
BASEREL: BaseReloc [
BASEREL-NEXT: Entry {
BASEREL-NEXT: Type: DIR64
BASEREL-NEXT: Address: 0x1020
BASEREL-NEXT: }
BASEREL-NEXT: Entry {
BASEREL-NEXT: Type: DIR64
BASEREL-NEXT: Address: 0x1028
BASEREL-NEXT: }
BASEREL-NEXT: Entry {
BASEREL-NEXT: Type: DIR64
BASEREL-NEXT: Address: 0x1030
BASEREL-NEXT: }