mirror of https://github.com/acidanthera/audk.git
bac9c74080
Most module types have standardized entry point function prototypes. They
are declared in headers like
- MdePkg/Include/Library/PeiCoreEntryPoint.h
- MdePkg/Include/Library/PeimEntryPoint.h
- MdePkg/Include/Library/DxeCoreEntryPoint.h
- MdePkg/Include/Library/UefiDriverEntryPoint.h
- MdePkg/Include/Library/UefiApplicationEntryPoint.h
These header files also declare matching ProcessLibraryConstructorList()
prototypes.
The SEC module type does not have a standardized entry point prototype
(aka parameter list), therefore no header file like the above ones exists
for SEC. Consequently, no header file *declares*
ProcessLibraryConstructorList() for SEC modules, even though AutoGen
always *defines* ProcessLibraryConstructorList() with the same, empty,
parameter list (i.e., just (VOID)).
The lack of a central declaration is a problem because in SEC code,
ProcessLibraryConstructorList() needs to be called manually, and those
calls need a prototype. Most SEC modules in edk2 get around this by
declaring ProcessLibraryConstructorList() manually, while some others use
an incorrect (PEIM) prototype.
Liming suggested in
<https://bugzilla.tianocore.org/show_bug.cgi?id=991#c2> that AutoGen
provide the declaration as well; implement that in this patch.
Mike suggested that the feature be gated with INF_VERSION, for
compatibility reasons. (INF_VERSION >= 1.30) reflects that the latest
(draft) version of the INF specification, as of this writing, is commit
a31e3c842bee / version 1.29.
For example, if we modify "OvmfPkg/Sec/SecMain.inf" as follows:
> diff --git a/OvmfPkg/Sec/SecMain.inf b/OvmfPkg/Sec/SecMain.inf
> index 3c47a664a95d..dca932a474ee 100644
> --- a/OvmfPkg/Sec/SecMain.inf
> +++ b/OvmfPkg/Sec/SecMain.inf
> @@ -8,7 +8,7 @@
> ##
>
> [Defines]
> - INF_VERSION = 0x00010005
> + INF_VERSION = 1.30
> BASE_NAME = SecMain
> FILE_GUID = df1ccef6-f301-4a63-9661-fc6030dcc880
> MODULE_TYPE = SEC
then the patch produces the following difference in
"Build/OvmfX64/NOOPT_GCC5/X64/OvmfPkg/Sec/SecMain/DEBUG/AutoGen.h":
> --- AutoGen.h.orig 2024-02-06 23:10:23.469535345 +0100
> +++ AutoGen.h 2024-02-07 00:00:57.361294055 +0100
> @@ -220,6 +220,13 @@
>
> // Definition of PCDs used in libraries is in AutoGen.c
>
> +// ProcessLibraryConstructorList() declared here because SEC has no standard entry point.
> +VOID
> +EFIAPI
> +ProcessLibraryConstructorList (
> + VOID
> + );
> +
>
> #ifdef __cplusplus
> }
which presently (as of edk2 commit
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