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EmulatorPkg: Improve comments in WinThunk.c 

File description has not been updated since Nt32Pkg was merged
with EmulatorPkg, and several details were no longer technically accurate.

Cc: Andrew Fish <afish@apple.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Chasel Chiu <chasel.chiu@intel.com>
Signed-off-by: Nate DeSimone <nathaniel.l.desimone@intel.com>
This commit is contained in:
Nate DeSimone 2023-09-20 16:18:18 -07:00 committed by mergify[bot]
parent e8166a852e
commit 3114fd8ed7
1 changed files with 5 additions and 12 deletions
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17
EmulatorPkg/Win/Host/WinThunk.c
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@ -10,21 +10,14 @@ Module Name:
Abstract:
Since the SEC is the only windows program in our emulation we
must use a Tiano mechanism to export Win32 APIs to other modules.
This is the role of the EFI_WIN_NT_THUNK_PROTOCOL.
must use a Tiano mechanism to export operating system services
to other modules. This is the role of the EMU_THUNK_PROTOCOL.
The mWinNtThunkTable exists so that a change to EFI_WIN_NT_THUNK_PROTOCOL
The gEmuThunkProtocol exists so that a change to EMU_THUNK_PROTOCOL
will cause an error in initializing the array if all the member functions
are not added. It looks like adding a element to end and not initializing
it may cause the table to be initaliized with the members at the end being
set to zero. This is bad as jumping to zero will case the NT32 to crash.
All the member functions in mWinNtThunkTable are Win32
API calls, so please reference Microsoft documentation.
gWinNt is a a public exported global that contains the initialized
data.
it may cause the table to be initalized with the members at the end being
set to zero. This is bad as jumping to zero will case EmulatorPkg to crash.
**/