Create bootloader_message static library.

bootloader_messages merges bootloader_message_writer
and bootloader.cpp, so we can use the same library to
manage bootloader_message in normal boot and recovery mode.

Bug: 29582118

Change-Id: I9efdf776ef8f02b53911ff43a518e035e0c29618

Android.mk

@@ -31,7 +31,6 @@ include $(CLEAR_VARS)
 LOCAL_SRC_FILES := \
     adb_install.cpp \
     asn1_decoder.cpp \
-    bootloader.cpp \
     device.cpp \
     fuse_sdcard_provider.cpp \
     install.cpp \
@@ -66,6 +65,7 @@ LOCAL_C_INCLUDES += \
 
 LOCAL_STATIC_LIBRARIES := \
     libbatterymonitor \
+    libbootloader_message \
     libext4_utils_static \
     libsparse_static \
     libminzip \
@@ -143,15 +143,17 @@ LOCAL_SRC_FILES := \
 LOCAL_STATIC_LIBRARIES := libcrypto_static
 include $(BUILD_STATIC_LIBRARY)
 
-include $(LOCAL_PATH)/minui/Android.mk \
+include \
+    $(LOCAL_PATH)/applypatch/Android.mk \
+    $(LOCAL_PATH)/bootloader_message/Android.mk \
+    $(LOCAL_PATH)/edify/Android.mk \
+    $(LOCAL_PATH)/minui/Android.mk \
     $(LOCAL_PATH)/minzip/Android.mk \
     $(LOCAL_PATH)/minadbd/Android.mk \
     $(LOCAL_PATH)/mtdutils/Android.mk \
+    $(LOCAL_PATH)/otafault/Android.mk \
     $(LOCAL_PATH)/tests/Android.mk \
     $(LOCAL_PATH)/tools/Android.mk \
-    $(LOCAL_PATH)/edify/Android.mk \
     $(LOCAL_PATH)/uncrypt/Android.mk \
-    $(LOCAL_PATH)/otafault/Android.mk \
     $(LOCAL_PATH)/updater/Android.mk \
     $(LOCAL_PATH)/update_verifier/Android.mk \
-    $(LOCAL_PATH)/applypatch/Android.mk

bootloader.h

@@ -14,76 +14,5 @@
  * limitations under the License.
  */
 
-#ifndef _RECOVERY_BOOTLOADER_H
-#define _RECOVERY_BOOTLOADER_H
-
-#include <stddef.h>
-
-// Spaces used by misc partition are as below:
-// 0   - 2K     Bootloader Message
-// 2K  - 16K    Used by Vendor's bootloader
-// 16K - 64K    Used by uncrypt and recovery to store wipe_package for A/B devices
-// Note that these offsets are admitted by bootloader,recovery and uncrypt, so they
-// are not configurable without changing all of them.
-static const size_t BOOTLOADER_MESSAGE_OFFSET_IN_MISC = 0;
-static const size_t WIPE_PACKAGE_OFFSET_IN_MISC = 16 * 1024;
-
-/* Bootloader Message
- *
- * This structure describes the content of a block in flash
- * that is used for recovery and the bootloader to talk to
- * each other.
- *
- * The command field is updated by linux when it wants to
- * reboot into recovery or to update radio or bootloader firmware.
- * It is also updated by the bootloader when firmware update
- * is complete (to boot into recovery for any final cleanup)
- *
- * The status field is written by the bootloader after the
- * completion of an "update-radio" or "update-hboot" command.
- *
- * The recovery field is only written by linux and used
- * for the system to send a message to recovery or the
- * other way around.
- *
- * The stage field is written by packages which restart themselves
- * multiple times, so that the UI can reflect which invocation of the
- * package it is.  If the value is of the format "#/#" (eg, "1/3"),
- * the UI will add a simple indicator of that status.
- *
- * The slot_suffix field is used for A/B implementations where the
- * bootloader does not set the androidboot.ro.boot.slot_suffix kernel
- * commandline parameter. This is used by fs_mgr to mount /system and
- * other partitions with the slotselect flag set in fstab. A/B
- * implementations are free to use all 32 bytes and may store private
- * data past the first NUL-byte in this field.
- */
-struct bootloader_message {
-    char command[32];
-    char status[32];
-    char recovery[768];
-
-    // The 'recovery' field used to be 1024 bytes.  It has only ever
-    // been used to store the recovery command line, so 768 bytes
-    // should be plenty.  We carve off the last 256 bytes to store the
-    // stage string (for multistage packages) and possible future
-    // expansion.
-    char stage[32];
-    char slot_suffix[32];
-    char reserved[192];
-};
-
-/* Read and write the bootloader command from the "misc" partition.
- * These return zero on success.
- */
-int get_bootloader_message(struct bootloader_message *out);
-int set_bootloader_message(const struct bootloader_message *in);
-
-#ifdef __cplusplus
-
-#include <string>
-
-bool read_wipe_package(size_t size, std::string* out);
-#endif
-
-#endif
+// TODO: Remove this file once we remove all places that include this file.
+#include "bootloader_message/include/bootloader_message/bootloader_message.h"

bootloader_message/Android.mk

@@ -0,0 +1,24 @@
+# Copyright (C) 2016 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_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_CLANG := true
+LOCAL_SRC_FILES := bootloader_message.cpp
+LOCAL_MODULE := libbootloader_message
+LOCAL_STATIC_LIBRARIES := libbase libfs_mgr
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+include $(BUILD_STATIC_LIBRARY)