Adding support of building BaseTool for Windows ARM (#323)

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docs](https://github.com/microsoft/mu/blob/master/CONTRIBUTING.md) prior
to submitting the pull request. In particular,
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guidelines](https://github.com/microsoft/mu/blob/master/CONTRIBUTING.md#pull-request-best-practices).

This change focuses on the support of building basetool natively for
Windows ARM host system. The end goal is to publish the corresponding
external dependencies to nuget package.

This change should progress the issue here:
#305

For each item, place an "x" in between `[` and `]` if true. Example:
`[x]`.
_(you can also check items in the GitHub UI)_

- [x] Impacts functionality?
- **Functionality** - Does the change ultimately impact how firmware
functions?
- Examples: Add a new library, publish a new PPI, update an algorithm,
...
- [ ] Impacts security?
- **Security** - Does the change have a direct security impact on an
application,
    flow, or firmware?
  - Examples: Crypto algorithm change, buffer overflow fix, parameter
    validation improvement, ...
- [ ] Breaking change?
- **Breaking change** - Will anyone consuming this change experience a
break
    in build or boot behavior?
- Examples: Add a new library class, move a module to a different repo,
call
    a function in a new library class in a pre-existing module, ...
- [ ] Includes tests?
  - **Tests** - Does the change include any explicit test code?
  - Examples: Unit tests, integration tests, robot tests, ...
- [ ] Includes documentation?
- **Documentation** - Does the change contain explicit documentation
additions
    outside direct code modifications (and comments)?
- Examples: Update readme file, add feature readme file, link to
documentation
    on an a separate Web page, ...

This change is manually tested on Surface Pro X system.

N/A

BaseTools/Source/C/GenFw/GenFw.c

@@ -1139,7 +1139,7 @@ Routine Description:
   UINT32                           OutputFileLength;
   UINT8                            *InputFileBuffer;
   UINT32                           InputFileLength;
-  RUNTIME_FUNCTION                 *RuntimeFunction;
+  PD_RUNTIME_FUNCTION              *RuntimeFunction;  // MU_CHANGE: Resolve definition conflict for ARM
   UNWIND_INFO                      *UnwindInfo;
   STATUS                           Status;
   BOOLEAN                          ReplaceFlag;
@@ -2553,8 +2553,10 @@ Routine Description:
               //
               memset (SectionHeader->Name, 0, sizeof (SectionHeader->Name));
 
-              RuntimeFunction = (RUNTIME_FUNCTION *)(FileBuffer + SectionHeader->PointerToRawData);
-              for (Index1 = 0; Index1 < Optional64->DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_EXCEPTION].Size / sizeof (RUNTIME_FUNCTION); Index1++, RuntimeFunction++) {
+              // MU_CHANGE Starts: Resolve definition conflict for ARM
+              RuntimeFunction = (PD_RUNTIME_FUNCTION *)(FileBuffer + SectionHeader->PointerToRawData);
+              for (Index1 = 0; Index1 < Optional64->DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_EXCEPTION].Size / sizeof (PD_RUNTIME_FUNCTION); Index1++, RuntimeFunction++) {
+              // MU_CHANGE Ends
                 SectionHeader = (EFI_IMAGE_SECTION_HEADER *) ((UINT8 *) &(PeHdr->Pe32.OptionalHeader) + PeHdr->Pe32.FileHeader.SizeOfOptionalHeader);
                 for (Index2 = 0; Index2 < PeHdr->Pe32.FileHeader.NumberOfSections; Index2++, SectionHeader++) {
                   if (RuntimeFunction->UnwindInfoAddress >= SectionHeader->VirtualAddress && RuntimeFunction->UnwindInfoAddress < (SectionHeader->VirtualAddress + SectionHeader->SizeOfRawData)) {
@@ -2566,7 +2568,7 @@ Routine Description:
                     break;
                   }
                 }
-                memset (RuntimeFunction, 0, sizeof (RUNTIME_FUNCTION));
+                memset (RuntimeFunction, 0, sizeof (PD_RUNTIME_FUNCTION)); // MU_CHANGE: Resolve definition conflict for ARM
               }
               //
               // Zero Exception Table

BaseTools/Source/C/Makefile

@@ -4,7 +4,10 @@
 # Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
 # SPDX-License-Identifier: BSD-2-Clause-Patent
 #
+# MU_CHANGE: Only override HOST_ARCH when it is not specified
+!IFNDEF HOST_ARCH
 HOST_ARCH = IA32
+!ENDIF
 
 !INCLUDE Makefiles\ms.common
 

BaseTools/Source/C/Makefiles/ms.common

@@ -52,6 +52,15 @@ LIB_PATH     = $(BASE_TOOLS_PATH)\Lib\Win64
 SYS_BIN_PATH = $(EDK_TOOLS_PATH)\Bin\Win64
 SYS_LIB_PATH = $(EDK_TOOLS_PATH)\Lib\Win64
 
+# MU_CHANGE Starts: Adding support to build base tools for ARM
+!ELSEIF "$(HOST_ARCH)"=="ARM"
+ARCH_INCLUDE = $(EDK2_PATH)\MdePkg\Include\Arm
+BIN_PATH     = $(BASE_TOOLS_PATH)\Bin\Win32
+LIB_PATH     = $(BASE_TOOLS_PATH)\Lib\Win32
+SYS_BIN_PATH = $(EDK_TOOLS_PATH)\Bin\Win32
+SYS_LIB_PATH = $(EDK_TOOLS_PATH)\Lib\Win32
+# MU_CHANGE Ends
+
 !ELSE
 !ERROR "Bad HOST_ARCH"
 !ENDIF

MdePkg/Include/IndustryStandard/PeImage.h

@@ -700,7 +700,7 @@ typedef struct {
   UINT32    FunctionStartAddress;
   UINT32    FunctionEndAddress;
   UINT32    UnwindInfoAddress;
-} RUNTIME_FUNCTION;
+} PD_RUNTIME_FUNCTION; // MU_CHANGE: Resolve definition conflict in winnt.h for ARM target.
 
 typedef struct {
   UINT8    Version             : 3;