From 9c912e927e4ec8a3d442982ea05fa95b33659fc6 Mon Sep 17 00:00:00 2001
From: Ayrton Munoz <ayrton@google.com>
Date: Tue, 20 Dec 2022 09:44:43 -0500
Subject: libbinder: Add support for Trusty kernel

This adds build system support for libbinder in the trusty
kernel. The kernel needs a separate rules.mk because
trusty's userspace build system does not support all the
flags used in the existing rules.mk when building kernel
modules. When trusty fully switches to bazel these two
makefiles should get combined into one.

Bug: 230134581
Test: build Trusty
Change-Id: I1a1d2c84ab011d3f36a1c69a4acd4780ca01f75e
---
 libs/binder/trusty/kernel/rules.mk | 83 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 libs/binder/trusty/kernel/rules.mk

diff --git a/libs/binder/trusty/kernel/rules.mk b/libs/binder/trusty/kernel/rules.mk
new file mode 100644
index 0000000000..ab7a50d3f7
--- /dev/null
+++ b/libs/binder/trusty/kernel/rules.mk
@@ -0,0 +1,83 @@
+# Copyright (C) 2022 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+MODULE := $(LOCAL_DIR)
+
+LIBBINDER_DIR := frameworks/native/libs/binder
+LIBBASE_DIR := system/libbase
+LIBCUTILS_DIR := system/core/libcutils
+LIBUTILS_DIR := system/core/libutils
+FMTLIB_DIR := external/fmtlib
+
+MODULE_SRCS := \
+	$(LOCAL_DIR)/../logging.cpp \
+	$(LOCAL_DIR)/../TrustyStatus.cpp \
+	$(LIBBINDER_DIR)/Binder.cpp \
+	$(LIBBINDER_DIR)/BpBinder.cpp \
+	$(LIBBINDER_DIR)/FdTrigger.cpp \
+	$(LIBBINDER_DIR)/IInterface.cpp \
+	$(LIBBINDER_DIR)/IResultReceiver.cpp \
+	$(LIBBINDER_DIR)/Parcel.cpp \
+	$(LIBBINDER_DIR)/Stability.cpp \
+	$(LIBBINDER_DIR)/Status.cpp \
+	$(LIBBINDER_DIR)/Utils.cpp \
+	$(LIBBASE_DIR)/hex.cpp \
+	$(LIBBASE_DIR)/stringprintf.cpp \
+	$(LIBUTILS_DIR)/Errors.cpp \
+	$(LIBUTILS_DIR)/misc.cpp \
+	$(LIBUTILS_DIR)/RefBase.cpp \
+	$(LIBUTILS_DIR)/StrongPointer.cpp \
+	$(LIBUTILS_DIR)/Unicode.cpp \
+
+# TODO: remove the following when libbinder supports std::string
+# instead of String16 and String8 for Status and descriptors
+MODULE_SRCS += \
+	$(LIBUTILS_DIR)/SharedBuffer.cpp \
+	$(LIBUTILS_DIR)/String16.cpp \
+	$(LIBUTILS_DIR)/String8.cpp \
+
+# TODO: disable dump() transactions to get rid of Vector
+MODULE_SRCS += \
+	$(LIBUTILS_DIR)/VectorImpl.cpp \
+
+MODULE_DEFINES += \
+	LK_DEBUGLEVEL_NO_ALIASES=1 \
+
+MODULE_INCLUDES += \
+	$(LOCAL_DIR)/.. \
+
+GLOBAL_INCLUDES += \
+	$(LOCAL_DIR)/include \
+	$(LOCAL_DIR)/../include \
+	$(LIBBINDER_DIR)/include \
+	$(LIBBINDER_DIR)/ndk/include_cpp \
+	$(LIBBASE_DIR)/include \
+	$(LIBCUTILS_DIR)/include \
+	$(LIBUTILS_DIR)/include \
+	$(FMTLIB_DIR)/include \
+
+GLOBAL_COMPILEFLAGS += \
+	-DANDROID_BASE_UNIQUE_FD_DISABLE_IMPLICIT_CONVERSION \
+	-DBINDER_NO_KERNEL_IPC \
+	-DBINDER_RPC_SINGLE_THREADED \
+	-D__ANDROID_VNDK__ \
+
+MODULE_DEPS += \
+	trusty/kernel/lib/libcxx-trusty \
+	trusty/kernel/lib/libcxxabi-trusty \
+
+include make/module.mk
-- 
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