[PATCH v1 3/5] PrmPkg: Build Prm Samples with GCC for AARCH64

["Sami Mujawar" <sami.mujawar@arm.com>]

From: Jose Marinho <jose.marinho@arm.com>

- Add the --prm flag to the GENFW_FLAGS
- Add the --no-gc-section to the linker flags so that apparently
unreferenced symbols are not prematurely removed from the .dll which
is used to generate the Prm module .efi.
- Force the linker to maintain the PrmModuleExportDescriptor symbol.
- Force the linker to maintain the PRM handler funtion's symbol.

Signed-off-by: Jose Marinho <jose.marinho@arm.com>
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
---
 PrmPkg/Samples/PrmSampleAcpiParameterBufferModule/PrmSampleAcpiParameterBufferModule.inf | 4 ++++
 PrmPkg/Samples/PrmSampleContextBufferModule/PrmSampleContextBufferModule.inf             | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/PrmPkg/Samples/PrmSampleAcpiParameterBufferModule/PrmSampleAcpiParameterBufferModule.inf b/PrmPkg/Samples/PrmSampleAcpiParameterBufferModule/PrmSampleAcpiParameterBufferModule.inf
index e8b71a970d83d44485430c2e3dc24e1a80da75c8..04addecc861e643cbb2be07e995708b42059719c 100644
--- a/PrmPkg/Samples/PrmSampleAcpiParameterBufferModule/PrmSampleAcpiParameterBufferModule.inf
+++ b/PrmPkg/Samples/PrmSampleAcpiParameterBufferModule/PrmSampleAcpiParameterBufferModule.inf
@@ -7,6 +7,7 @@
 #  code at OS runtime.
 #
 #  Copyright (c) Microsoft Corporation
+#  Copyright (c) 2022, Arm Limited. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -39,3 +40,6 @@ [Depex]
 [BuildOptions.common]
   MSFT:*_*_*_DLINK_FLAGS  = /DLL /SUBSYSTEM:CONSOLE /VERSION:1.0
   MSFT:*_*_*_GENFW_FLAGS = --keepoptionalheader
+
+  GCC:*_*_AARCH64_GENFW_FLAGS = --prm
+  GCC:*_*_AARCH64_DLINK_FLAGS = -Wl,--no-gc-sections -Wl,--require-defined=PrmModuleExportDescriptor -Wl,--require-defined=CheckParamBufferPrmHandler
diff --git a/PrmPkg/Samples/PrmSampleContextBufferModule/PrmSampleContextBufferModule.inf b/PrmPkg/Samples/PrmSampleContextBufferModule/PrmSampleContextBufferModule.inf
index b97af923c47a70b280d270302aa8a7d058701c92..ff72a233669657c260f284cd2fbc4126077d4426 100644
--- a/PrmPkg/Samples/PrmSampleContextBufferModule/PrmSampleContextBufferModule.inf
+++ b/PrmPkg/Samples/PrmSampleContextBufferModule/PrmSampleContextBufferModule.inf
@@ -7,6 +7,7 @@
 #
 #  Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
 #  Copyright (c) Microsoft Corporation
+#  Copyright (c) 2022, Arm Limited. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -42,3 +43,6 @@ [Depex]
 [BuildOptions.common]
   MSFT:*_*_*_DLINK_FLAGS  = /DLL /SUBSYSTEM:CONSOLE /VERSION:1.0
   MSFT:*_*_*_GENFW_FLAGS = --keepoptionalheader
+
+  GCC:*_*_AARCH64_GENFW_FLAGS = --keepoptionalheader --prm
+  GCC:*_*_AARCH64_DLINK_FLAGS = -Wl,--no-gc-sections -Wl,--require-defined=PrmModuleExportDescriptor -Wl,--require-defined=CheckStaticDataBufferPrmHandler
-- 
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'