From ac94ad2ef113bac1f3c80a654f6c3836e547f96c Mon Sep 17 00:00:00 2001
From: chenmaodong <chenmaodong@huawei.com>
Date: Thu, 18 Feb 2021 14:42:42 +0800
Subject: [PATCH 5/7] delete unnecessary README.cn.md

Signed-off-by: chenmaodong <chenmaodong@huawei.com>
---
 README.cn.md | 454 ------------------------
 README.en.md |  27 +-
 README.md    | 967 ++++++++++++++++++++++++---------------------------
 3 files changed, 469 insertions(+), 979 deletions(-)
 delete mode 100644 README.cn.md

diff --git a/README.cn.md b/README.cn.md
deleted file mode 100644
index 54c32e3..0000000
--- a/README.cn.md
+++ /dev/null
@@ -1,454 +0,0 @@
-<img src="docs/logo.png" alt="secGear" style="zoom:100%;" />
-
-secGear
-============================
-
-介绍
------------
-
-SecGear则是面向计算产业的机密计算安全应用开发套件。旨在方便开发者在不同的硬件设备上提供统一开发框架。目前secGear支持intel SGX硬件和Trustzone itrustee。
-
-构建、安装
-----------------
-
-- [详见 构建、安装](./docs/build_install.md)
-
-开发应用和编译
-------------------------------
-
-开发目录 .../secGear/examples/test/
-
-### 1 编写edl接口文件
-
-	enclave {
-		include "secgear_urts.h"
-		from "secgear_tstdc.edl" import *;
-		trusted {
-			public int get_string([out, size=32]char *buf);
-		};
-	};
-'include "secgear_urts.h" from "secgear_tstdc.edl" import *'是为了屏蔽SGX和iTrustee在调用libc库之间的差异。所以为了开发代码的一致性，默认导入这两个文件。
-有关edl语法的详细信息，请参阅SGX开发文档定义的EDL(Enclave Definition Language)语法部分。
-目前SGX和iTrustee在基本类型、指针类型和深拷贝方面是相互兼容的。对于user_check、private ecalls、switchless特性仅支持sgx硬件。
-
-保存文件名为test.edl
-
-### 2 编写最外层CMakeLists.txt文件
-
-	cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
-	project(TEST  C)
-	set(CMAKE_C_STANDARD 99)
-	set(CURRENT_ROOT_PATH ${CMAKE_CURRENT_SOURCE_DIR})
-	set(EDL_FILE test.edl)
-	set(LOCAL_ROOT_PATH "$ENV{CC_SDK}")
-        set(SECGEAR_INSTALL_PATH /lib64/)
-	if(CC_GP)
-		set(CODETYPE trustzone)
-		set(CODEGEN codegen_arm64)
-		execute_process(COMMAND uuidgen -r OUTPUT_VARIABLE UUID)
-		string(REPLACE "\n" "" UUID ${UUID})
-		add_definitions(-DPATH="/data/${UUID}.sec")
-	endif()
-	if(CC_SGX)
-		set(CODETYPE sgx)
-		set(CODEGEN codegen_x86_64)
-		add_definitions(-DPATH="${CMAKE_CURRENT_BINARY_DIR}/enclave/enclave.signed.so")
-	endif()
-	add_subdirectory(${CURRENT_ROOT_PATH}/enclave)
-	add_subdirectory(${CURRENT_ROOT_PATH}/host)
-
-EDL_FILE、CODETYPE：稍后自动构建的时候会用到这些属性。
-UUID：在iTrustee中，构建安全enclave动态库需要使用UUID命名，这里由uuidgen命令自动生成。
-DPATH：用于定义非安全侧使用安全侧动态库的绝对路径
-
-### 3 编写非安全侧代码和CMakeLists.txt文件
-
-#### 3.1 创建host目录和main.c文件
-
-	#include <stdio.h>
-	#include "enclave.h"
-	#include "test_u.h"
-
-	#define BUF_LEN 32
-
-	int main()
-	{
-		int  retval = 0;
-		char *path = PATH;
-		char buf[BUF_LEN];
-		cc_enclave_t *context = NULL;
-		cc_enclave_result_t res;
-		
-		res = cc_enclave_create(path, AUTO_ENCLAVE_TYPE, 0, SECGEAR_DEBUG_FLAG, NULL, 0, &context);
-		...
-
-		res = get_string(context, &retval, buf);
-		if (res != CC_SUCCESS || retval != (int)CC_SUCCESS) {
-			printf("Ecall enclave error\n");
-		} else {
-			printf("%s\n", buf);
-		}
-
-		if (context != NULL) {
-			res = cc_enclave_destroy(context);
-			...
-		}
-		return res;
-	}
-
-enclave.h: secGear库头文件
-test_u.h: 根据edl文件自动生成的非安全侧头文件。
-cc_enclave_create: 用于创建enclave安全上下文。
-get_string: 根据edl中trusted定义的安全侧代理函数，该代理函数用于进入到安全侧执行安全代码。
-cc_enclave_destroy: 用于销毁enclave安全上下文。
-
-注意：这里调用的get_string函数与在edl中定义的get_string函数有些不同，这里的参数比edl中定义的多了前两个参数，分别是enclave安全上下文
-和retval参数。这是因为codegen（自动生成代码工具）通过edl生成的非安全侧代理函数，其声明在test_u.h中。
-如果在edl中定义的函数无返回值时，例如"public void get_string([out,size=32] char *buf);"则非安全侧代理函数为
-"res=get_string(context, buf)"(这里就不在有retval参数)
-
-#### 3.2 编写非安全侧CMakeLists.txt
-
-        #set auto code prefix
-	set(PREFIX test)
-	#set host exec name
-	set(OUTPUT secgear_test)
-	#set host src code
-	set(SOURCE_FILE ${CMAKE_CURRENT_SOURCE_DIR}/main.c)    
-
-设置预备的基础变量
-
-        #set auto code
-	if(CC_GP)
-		set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.c ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_args.h)
-		add_custom_command(OUTPUT ${AUTO_FILES}
-		DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
-		COMMAND ${CODEGEN} --${CODETYPE} --untrusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/gp)
-	endif()
-
-	if(CC_SGX)
-		set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.c)
-		add_custom_command(OUTPUT ${AUTO_FILES}
-		DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
-		COMMAND ${CODEGEN} --${CODETYPE} --untrusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/sgx  --search-path ${SGXSDK}/include)
-	endif()
-
-设置使用代码辅助生成工具根据edl文件生成辅助代码。CODEGEN和CODETYPE等变量定义在CMakeList.txt文件.--search-path用于搜索在edl文件中导入依赖的其他edl文件。
-当使用SGX时，需要导入sgx提供的基础edl，因此这里指定了SGXSDK的patch "--search-path ${SGXSDK}/include)"。
-
-	set(CMAKE_C_FLAGS "-fstack-protector-all -W -Wall -Werror -Wextra -Werror=array-bounds -D_FORTIFY_SOURCE=2 -O2 -ftrapv -fPIE")
-	set(CMAKE_EXE_LINKER_FLAGS    "-Wl,-z,relro -Wl,-z,now -Wl,-z,noexecstack")
-
-设置编译选项和链接选项
-
-	if(CC_GP)
-		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
-			link_directories(${SECGEAR_INSTALL_PATH})
-		endif()
-		add_executable(${OUTPUT} ${SOURCE_FILE} ${AUTO_FILES})
-		target_include_directories(${OUTPUT} PRIVATE
-						${LOCAL_ROOT_PATH}/inc/host_inc
-						${LOCAL_ROOT_PATH}/inc/host_inc/gp
-						${CMAKE_CURRENT_BINARY_DIR})
-		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
-			target_link_directories(${OUTPUT} PRIVATE ${SECGEAR_INSTALL_PATH})
-		endif()
-	endif()
-
-在iTrustee硬件环境上，设置头文件的搜索路径及编译生成非安全侧二进制文件。
-
-	if(CC_SGX)
-		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
-			link_directories(${SECGEAR_INSTALL_PATH})
-		endif()
-		add_executable(${OUTPUT} ${SOURCE_FILE} ${AUTO_FILES})
-		target_include_directories(${OUTPUT} PRIVATE
-							${LOCAL_ROOT_PATH}/inc/host_inc
-							${LOCAL_ROOT_PATH}/inc/host_inc/sgx
-							${CMAKE_CURRENT_BINARY_DIR})
-		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
-			target_link_directories(${OUTPUT} PRIVATE ${SECGEAR_INSTALL_PATH})
-		endif()
-	endif()
-
-在SGX硬件环境上，设置头文件的搜索路径及编译生成非安全侧二进制文件。
-
-	if(CC_SIM)
-            target_link_libraries(${OUTPUT} secgearsim)
-        else()
-            target_link_libraries(${OUTPUT} secgear)
-        endif()
-        set_target_properties(${OUTPUT} PROPERTIES SKIP_BUILD_RPATH TRUE)
-	if(CC_GP)
-		install(TARGETS  ${OUTPUT}
-				RUNTIME
-				DESTINATION /vendor/bin/
-				PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ)
-	endif()
-	if(CC_SGX)
-		install(TARGETS  ${OUTPUT}
-				RUNTIME
-				DESTINATION ${CMAKE_BINARY_DIR}/bin/
-				PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ)
-	endif()
-
-
-设置secGear链接库，当指定模拟模式CC_SIM时链接libsecgearsim.so，否则链接libsecgear.so。
-在iTrustee硬件环境上需指定安装固定的安全白名单。
-
-### 4 编写安全侧代码、CMakeList.txt及基础配置文件
-
-#### 4.1 创建enclave目录 编写hello.c
-
-	#include <stdio.h>
-	#include <string.h>
-	#include "test_t.h"
-
-	#define TA_HELLO_WORLD        "secGear hello world!"
-	#define BUF_MAX 32
-	int get_string(char *buf)
-	{
-		strncpy(buf, TA_HELLO_WORLD, strlen(TA_HELLO_WORLD) + 1);
-		return 0;
-	}
-
-test_t.h：该头文件为自动生成代码工具codegen通过edl文件生成的头文件。该头文件命名为edl文件名加"_t"。
-
-#### 4.2 编写CMakeList.txt文件
-
-	#set auto code prefix
-	set(PREFIX test)
-	#set sign key
-	set(PEM Enclave_private.pem)
-
-设置enclave签名私钥
-
-	#set sign tool
-	set(SIGN_TOOL ${LOCAL_ROOT_PATH}/tools/sign_tool/sign_tool.sh)
-	#set enclave src code
-	set(SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/hello.c)
-	#set log level
-	set(PRINT_LEVEL 3)
-	add_definitions(-DPRINT_LEVEL=${PRINT_LEVEL})
-
-设置签名工具已经安全侧打印日志level
-
-	if(CC_GP)
-            #set signed output
-            set(OUTPUT ${UUID}.sec)
-            #set itrustee device key
-            set(DEVICEPEM ${CMAKE_CURRENT_SOURCE_DIR}/rsa_public_key_cloud.pem)
-
-            set(WHITE_LIST_0 /vendor/bin/helloworld)
-            set(WHITE_LIST_1 /vendor/bin/secgear_test)
-            set(WHITE_LIST_OWNER root)
-            set(WHITELIST WHITE_LIST_0 WHITE_LIST_1)
-
-            set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.c ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_args.h)
-            add_custom_command(OUTPUT ${AUTO_FILES}
-            DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
-            COMMAND ${CODEGEN} --${CODETYPE} --trusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/gp)
-	endif()
-
-WHITE_LIST_x：为设置iTrustee的二进制白名单，只有这里定义的白名单，在非安全侧的二进制才可以调用安全侧的动态库。上限为8个。
-WHITE_LIST_OWNER：为设置运行二进制的用户，只有该用户才可以调用安全侧动态库。
-DEVICEPEM：该公钥用来动态生成aes秘钥
-AUTO_FILES：由edl文件生成的安全侧二进制文件
-
-        if(CC_SGX)
-	        set(OUTPUT enclave.signed.so)
-	        set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.c)
-	        add_custom_command(OUTPUT ${AUTO_FILES}
-	        DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
-	        COMMAND ${CODEGEN} --${CODETYPE} --trusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/sgx --search-path ${SGXSDK}/include)
-	endif()
-
-设置自动生成代码及签名动态库。
-
-	set(COMMON_C_FLAGS "-W -Wall -Werror  -fno-short-enums  -fno-omit-frame-pointer -fstack-protector \
-			-Wstack-protector --param ssp-buffer-size=4 -frecord-gcc-switches -Wextra -nostdinc -nodefaultlibs \
-			-fno-peephole -fno-peephole2 -Wno-main -Wno-error=unused-parameter \
-			-Wno-error=unused-but-set-variable -Wno-error=format-truncation=")
-
-	set(COMMON_C_LINK_FLAGS "-Wl,-z,now -Wl,-z,relro -Wl,-z,noexecstack -Wl,-nostdlib -nodefaultlibs -nostartfiles")
-
-设置安全侧便编译选项和链接选项。由于安全侧和非安全侧不同，非安全侧的标准动态库不能被安全侧链接。例如："-nostdlib -nodefaultlibs -nostartfiles"
-
-
-	if(CC_GP)
-		configure_file("${CMAKE_CURRENT_SOURCE_DIR}/manifest.txt.in" "${CMAKE_CURRENT_SOURCE_DIR}/manifest.txt")
-
-		set(CMAKE_C_FLAGS "${COMMON_C_FLAGS}  -march=armv8-a ")
-		set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS}  -s -fPIC")
-		set(CMAKE_SHARED_LINKER_FLAGS  "${COMMON_C_LINK_FLAGS} -Wl,-s")
-
-		set(ITRUSTEE_TEEDIR ${iTrusteeSDK}/)
-		set(ITRUSTEE_LIBC ${iTrusteeSDK}/thirdparty/open_source/musl/libc)
-
-		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
-			link_directories(${SECGEAR_INSTALL_PATH})
-		endif()
-
-		add_library(${PREFIX} SHARED ${SOURCE_FILES} ${AUTO_FILES})
-
-		target_include_directories( ${PREFIX} PRIVATE
-			${CMAKE_CURRENT_BINARY_DIR}
-			${LOCAL_ROOT_PATH}/inc/host_inc
-			${LOCAL_ROOT_PATH}/inc/host_inc/gp
-			${LOCAL_ROOT_PATH}/inc/enclave_inc
-			${LOCAL_ROOT_PATH}/inc/enclave_inc/gp
-			${ITRUSTEE_TEEDIR}/include/TA
-			${ITRUSTEE_TEEDIR}/include/TA/huawei_ext
-			${ITRUSTEE_LIBC}/arch/aarch64
-			${ITRUSTEE_LIBC}/
-			${ITRUSTEE_LIBC}/arch/arm/bits
-			${ITRUSTEE_LIBC}/arch/generic
-			${ITRUSTEE_LIBC}/arch/arm
-			${LOCAL_ROOT_PATH}/inc/enclave_inc/gp/itrustee)
-
-		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
-			target_link_directories(${PREFIX} PRIVATE ${SECGEAR_INSTALL_PATH})
-		endif()
-
-		foreach(WHITE_LIST ${WHITELIST})
-			add_definitions(-D${WHITE_LIST}="${${WHITE_LIST}}")
-		endforeach(WHITE_LIST)
-		add_definitions(-DWHITE_LIST_OWNER="${WHITE_LIST_OWNER}")
-
-		target_link_libraries(${PREFIX} -lsecgear_tee)
-
-		add_custom_command(TARGET ${PREFIX}
-			POST_BUILD
-			COMMAND bash ${SIGN_TOOL} -d sign -x trustzone -i lib${PREFIX}.so -m ${CMAKE_CURRENT_SOURCE_DIR}/manifest.txt
-			-e ${DEVICEPEM} -o ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT})
-
-		install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT}
-			DESTINATION /data
-			PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ GROUP_READ GROUP_EXECUTE  WORLD_READ  WORLD_EXECUTE)
-
-	endif()
-
-manifest.txt：itrustee安全侧配置文件，后面对该文件进行详解
-指定itrustee特性编译选项，设置引用头文件和动态库的路径。
-前面声明的白名单在这里定义。
-itrustee需要链接secgear_tee动态库，提供seal接口等。
-
-	if(CC_SGX)
-		set(SGX_DIR ${SGXSDK})
-		set(CMAKE_C_FLAGS "${COMMON_C_FLAGS} -m64 -fvisibility=hidden")
-		set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS}  -s")
-		set(LINK_LIBRARY_PATH ${SGX_DIR}/lib64)
-
-		if(CC_SIM)
-			set(Trts_Library_Name sgx_trts_sim)
-			set(Service_Library_Name sgx_tservice_sim)
-		else()
-			set(Trts_Library_Name sgx_trts)
-			set(Service_Library_Name sgx_tservice)
-		endif()
-
-		set(Crypto_Library_Name sgx_tcrypto)
-
-		set(CMAKE_SHARED_LINKER_FLAGS  "${COMMON_C_LINK_FLAGS} -Wl,-z,defs -Wl,-pie -Bstatic -Bsymbolic -eenclave_entry \
-			-Wl,--export-dynamic -Wl,--defsym,__ImageBase=0 -Wl,--gc-sections -Wl,--version-script=${CMAKE_CURRENT_SOURCE_DIR}/Enclave.lds")
-
-		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
-			link_directories(${LINK_LIBRARY_PATH})
-		endif()
-
-		add_library(${PREFIX}  SHARED ${SOURCE_FILES} ${AUTO_FILES})
-
-		target_include_directories(${PREFIX} PRIVATE
-				${CMAKE_CURRENT_BINARY_DIR}
-				${SGX_DIR}/include/tlibc
-				${SGX_DIR}/include/libcxx
-				${SGX_DIR}/include
-				${LOCAL_ROOT_PATH}/inc/host_inc
-				${LOCAL_ROOT_PATH}/inc/host_inc/sgx)
-
-		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
-			target_link_directories(${PREFIX} PRIVATE
-					${LINK_LIBRARY_PATH})
-		endif()
-
-		target_link_libraries(${PREFIX}  -Wl,--whole-archive ${Trts_Library_Name} -Wl,--no-whole-archive
-					-Wl,--start-group -lsgx_tstdc -lsgx_tcxx -l${Crypto_Library_Name} -l${Service_Library_Name}   -Wl,--end-group)
-		add_custom_command(TARGET ${PREFIX}
-		POST_BUILD
-		COMMAND openssl genrsa -3 -out ${PEM} 3072
-		COMMAND bash ${SIGN_TOOL} -d sign -x sgx -i lib${PREFIX}.so -k ${PEM} -o ${OUTPUT} -c ${CMAKE_CURRENT_SOURCE_DIR}/Enclave.config.xml)
-	endif()
-
-
-在SGX硬件环境上，指定一些与sgx相关的编译选项、链接选项。链接动态库时有所不同，因为itrustee是一个具有更多功能的安全操作系统。提供如muslibc和openssl。在编译和链接itrustee时不用链接一些基本库，但是sgx没有OS概念。所以要在安全侧调用这些基本库的接口都要以静态的形式在sgxsdk中给出。例如"sgx_trts"
-
-有关更多详细信息，请参阅sgx示例的Makefile。最后用enclave配置文件完成签名，稍后将进行介绍。secGear尚不支持远程身份验证。
-
-#### 4.3 编写安全侧配置文件
-
-编写与sgx enclave相关的配置文件中Enclave.config.xml文件及enclave.lds文件与官方sgx配置相同。详情参阅官方开发文档。
-
-编写itrustee enclave相关配置文件
-mainfest.txt.in:其中gpd.ta.appID 为动态生成uuid。其他配置参见itrustee开发文档。
-
-rsa_public_key_cloud.pem文件请将其他examples的中的拷贝过来，这里的设备公钥用于使用临时生成的aes密钥用于对enclave动态库进行加密。
-
-#### 5 构建 安装
-
-进入开发目录：cd .../secGear/example/test/
-创建debug目录：mkdir debug && cd debug
-cmake构建：cmake -DCMAKE_BUILD_TYPE=Debug -DCC_SGX=ON -DSGXSDK=sgx_sdk path .. &&  make && sudo make install （sgx硬件环境）
-          cmake -DCMAKE_BUILD_TYPE=Debug -DCC_GP=ON -DiTrusteeSDK=gp_sdk path .. && make && sudo make install （itrustee硬件环境）
-
-Log
----
-非安全侧日志记录：
-
-非安全侧是开发与普通开发环境一样，可使用通用打印日志接口。
-
-安全侧日志记录：
-
-由于各架构安全能力不同的限制，为了像非安全侧一样开发使用日志打印功能，因为我们提供了PrintInfo接口将安全端日志记录到syslog系统中。
-相关配置文件为 conf/logrotate.d/secgear和conf/rsyslog.d/secgear.conf文件，安装时将安装在系统目录/etc/中。
-
-注意：在itrustee上，需要include secgear_log.h头文件，但是sgx不需要，sgx通过ocall功能实现的，所以相关代码生成在辅助代码中。
-当文件安装成功后需要运行"systemctl restart rsyslog"使日志功能生效。
-
-日志等级：
-
-    PRINT_ERROR    0
-    PRINT_WARNING  1
-    PRINT_STRACE   2
-    PRINT_DEBUG    3
-
-使用ocall
----------
-
-目前ocall仅在sgx平台支持，itrustee尚不支持。
-
-seal, generate_random接口
---------------------------------------
-
-接口定义在secgear_dataseal.h、secgear_random.h中。
-注意：由于itrustee派生密钥的功能仍然不完善，因此目前还没有与密封相关的接口在itrustee平台上支持。
-
-远程证明（尚不支持）
---------------------------------------
-
-了解更多关于codegener
---------------------------------------
-
-secGear引入EDL(Enclave Description Language)和中间代码辅助生成工具codegener。edl与intel sgx定义兼容。
-
-
-- [了解更多关于codegener](./docs/codegener.md)
-
-了解更多关于sign_tool
------------------------------
-
-
-- [了解更多关于签名工具](./docs/sign_tool.md)
-
-里程碑
----------
-<img src="docs/milestone.png" alt="secGear" style="zoom:80%;" />
\ No newline at end of file
diff --git a/README.en.md b/README.en.md
index a8768cb..fa47d03 100644
--- a/README.en.md
+++ b/README.en.md
@@ -170,10 +170,9 @@ Set compile and link options
 		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
 			target_link_directories(${OUTPUT} PRIVATE ${SECGEAR_INSTALL_PATH})
 		endif()
-		target_link_libraries(${OUTPUT} secgear)
 	endif()
 
-In the case of iTrustee, set the search paths of the header file and the link file, and compile the final non-secure binary.
+In the case of iTrustee, set the search paths of the header file and compile the final non-secure binary.
 
 	if(CC_SGX)
 		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
@@ -187,12 +186,16 @@ In the case of iTrustee, set the search paths of the header file and the link fi
 		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
 			target_link_directories(${OUTPUT} PRIVATE ${SECGEAR_INSTALL_PATH})
 		endif()
-		target_link_libraries(${OUTPUT} secgear)
 	endif()
 
-In the case of sgx, set the search paths of the header file and the link file, and compile the final non-secure binary.
+In the case of sgx, set the search paths of the header file and compile the final non-secure binary.
 
-	set_target_properties(${OUTPUT} PROPERTIES SKIP_BUILD_RPATH TRUE)
+	if(CC_SIM)
+            target_link_libraries(${OUTPUT} secgearsim)
+        else()
+            target_link_libraries(${OUTPUT} secgear)
+        endif()
+        set_target_properties(${OUTPUT} PROPERTIES SKIP_BUILD_RPATH TRUE)
 	if(CC_GP)
 		install(TARGETS  ${OUTPUT}
 				RUNTIME
@@ -206,8 +209,9 @@ In the case of sgx, set the search paths of the header file and the link file, a
 				PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ)
 	endif()
 
-Specify the installation path of the final binary. The non-secure side image of iTrustee must be installed on the
-specified whitelist. The whitelist configuration will be introduced below.
+Based on -DCC_SIM=ON or none transferred from cmake, linking secgear or secgearsim. Specify the installation 
+path of the final binary. The non-secure side image of iTrustee must be installed on the specified whitelist. 
+The whitelist configuration will be introduced below.
 
 ### 4 Write security side code, CMakeLists.txt and some configuration files
 	
@@ -353,18 +357,17 @@ whitelist macro. Next, you need to link to the secgear_tee library, in which the
 random numbers, seal, unseal, etc. The last step is to sign and install.
 
 	if(CC_SGX)
-		set(SGX_MODE HW)
 		set(SGX_DIR ${SGXSDK})
 		set(CMAKE_C_FLAGS "${COMMON_C_FLAGS} -m64 -fvisibility=hidden")
 		set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS}  -s")
 		set(LINK_LIBRARY_PATH ${SGX_DIR}/lib64)
 
-		if(${SGX_MODE} STREQUAL HW)
-			set(Trts_Library_Name sgx_trts)
-			set(Service_Library_Name sgx_tservice)
-		else()
+		if(CC_SIM)
 			set(Trts_Library_Name sgx_trts_sim)
 			set(Service_Library_Name sgx_tservice_sim)
+		else()
+			set(Trts_Library_Name sgx_trts)
+			set(Service_Library_Name sgx_tservice)
 		endif()
 
 		set(Crypto_Library_Name sgx_tcrypto)
diff --git a/README.md b/README.md
index fa47d03..54c32e3 100644
--- a/README.md
+++ b/README.md
@@ -1,513 +1,454 @@
-﻿<img src="docs/logo.png" alt="secGear" style="zoom:100%;" />
-
-secGear
-============================
-
-Introduction
------------
-
-secGear is an SDK to develop confidential computing apps based on hardware enclave features. The target is to use
-single source code for developers to develop apps running on different hardware. Currently secGear support Intel SGX
-and iTrustee running in ARM Trustzone.
-
-Build and Install
-----------------
-
-- [reference build & install](./docs/build_install.md)
-
-Develop Application and Compile
-------------------------------
-
-Assuming the development directory is .../secGear/examples/test/
-	
-### 1 Write edl interface description
-	
-	enclave {
-		include "secgear_urts.h"
-		from "secgear_tstdc.edl" import *;
-		trusted {
-			public int get_string([out, size=32]char *buf);
-		};
-	};
-
-include "secgear_urts.h", from "secgear_tstdc.edl" import *, to shield the difference between sgx and iTrustee when
-calling the C library. So as long as you use the c library functions, for the consistency of your development code,
-the default is to import these two files.
-
-For details about edl syntax, please refer to the sgx development document Enclave Definition Language Syntax section.
-At present, sgx and iTrustee are compatible with each other in basic types, pointer buffers, and deep copy of
-structures, but currently only sgx supports such things as user_check, Granting Access to ECALLs, Using Switchless
-Calls and so on.
-
-Then save as test.edl
-
-### 2 Write the top-level CMakeLists.txt
-
-	cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
-	project(TEST  C)
-	set(CMAKE_C_STANDARD 99)
-	set(CURRENT_ROOT_PATH ${CMAKE_CURRENT_SOURCE_DIR})
-	set(EDL_FILE test.edl)
-	set(LOCAL_ROOT_PATH "$ENV{CC_SDK}")
-        set(SECGEAR_INSTALL_PATH /lib64/)
-	if(CC_GP)
-		set(CODETYPE trustzone)
-		set(CODEGEN codegen_arm64)
-		execute_process(COMMAND uuidgen -r OUTPUT_VARIABLE UUID)
-		string(REPLACE "\n" "" UUID ${UUID})
-		add_definitions(-DPATH="/data/${UUID}.sec")
-	endif()
-	if(CC_SGX)
-		set(CODETYPE sgx)
-		set(CODEGEN codegen_x86_64)
-		add_definitions(-DPATH="${CMAKE_CURRENT_BINARY_DIR}/enclave/enclave.signed.so")
-	endif()
-	add_subdirectory(${CURRENT_ROOT_PATH}/enclave)
-	add_subdirectory(${CURRENT_ROOT_PATH}/host)
-
-Set the CODETYPE EDL_FILE and CODETYPE attributes, which will be used when automatically generated later.
-On the arm platform, the build enclave image needs to be named with a unique UUID, so it is dynamically uniquely
-generated using the uuidgen command. The defined DPATH macro is used when loading the enclave image.
-
-
-### 3 Write the non-secure side code and CMakeLists.txt
-	
-#### 3.1 Create a new host directory and write main.c
-
-	#include <stdio.h>
-	#include "enclave.h"
-	#include "test_u.h"
-
-	#define BUF_LEN 32
-
-	int main()
-	{
-		int  retval = 0;
-		char *path = PATH;
-		char buf[BUF_LEN];
-		cc_enclave_t *context = NULL;
-		cc_enclave_result_t res;
-		
-		res = cc_enclave_create(path, AUTO_ENCLAVE_TYPE, 0, SECGEAR_DEBUG_FLAG, NULL, 0, &context);
-		...
-
-		res = get_string(context, &retval, buf);
-		if (res != CC_SUCCESS || retval != (int)CC_SUCCESS) {
-			printf("Ecall enclave error\n");
-		} else {
-			printf("%s\n", buf);
-		}
-
-		if (context != NULL) {
-			res = cc_enclave_destroy(context);
-			...
-		}
-		return res;
-	}
-	
-#include "enclave.h", import the secGear header file, #include "test_u.h" import the automatically generated code
-header file. Next, call cc_enclave_create(...) to create the enclave context, and then call the wrapper of the
-interface described in the edl file to enter the enclave to execute confidential code.
-Finally, call cc_enclave_destroy(...) to destroy the enclave context.
-	
-Note that the interface called here has more context and retval parameters than defined in edl file before.
-This is because this function, generated by the automatic code generation tool according to edl, is a wrapper about
-the real enclave code,  and its declaration is in the test_u.h header file. Where the context parameter it is the
-cc_enclave_t * context created before, and retval is the return value of the function defined in edl, and the res
-parameter is the return value of the wrapped function. The prefix of test_u.h is consistent with the prefix of test.edl.
-
-If the function defined in edl does not return a value, such as "public void get_string([out, size=32]char *buf);",
-then the prototype called by the user will be "res = get_string(context, buf);".
-
-According to these rules, you can write code when the wrapper function is not generated by code generation tool and
-place the wrapper function generation in the compilation phase, which simplifies the development and compilation steps.
-
-#### 3.2 Write the CMakeLists.txt file of the host.
-
-	#set auto code prefix
-	set(PREFIX test)
-	#set host exec name
-	set(OUTPUT secgear_test)
-	#set host src code
-	set(SOURCE_FILE ${CMAKE_CURRENT_SOURCE_DIR}/main.c)
-
-Set some variables, which are described in comments.
-
-	#set auto code
-	if(CC_GP)
-		set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.c ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_args.h)
-		add_custom_command(OUTPUT ${AUTO_FILES}
-		DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
-		COMMAND ${CODEGEN} --${CODETYPE} --untrusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/gp)
-	endif()
-
-	if(CC_SGX)
-		set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.c)
-		add_custom_command(OUTPUT ${AUTO_FILES}
-		DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
-		COMMAND ${CODEGEN} --${CODETYPE} --untrusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/sgx  --search-path ${SGXSDK}/include)
-	endif()
-
-Use the code generation tool to generate auxiliary code based on the edl. Variables such as CODEGEN and CODETYPE are
-defined at the top of CMakeList.txt. --search-path is used to search for other edl files imported in test.edl.
-When SGX is used, the edl imported in test.edl indirectly depends on the edl of the SGX SDK. Therefore, the search
-path of the SGX SDK is also specified here.
-
-	set(CMAKE_C_FLAGS "-fstack-protector-all -W -Wall -Werror -Wextra -Werror=array-bounds -D_FORTIFY_SOURCE=2 -O2 -ftrapv -fPIE")
-	set(CMAKE_EXE_LINKER_FLAGS    "-Wl,-z,relro -Wl,-z,now -Wl,-z,noexecstack")
-
-Set compile and link options
-	
-	if(CC_GP)
-		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
-			link_directories(${SECGEAR_INSTALL_PATH})
-		endif()
-		add_executable(${OUTPUT} ${SOURCE_FILE} ${AUTO_FILES})
-		target_include_directories(${OUTPUT} PRIVATE
-						${LOCAL_ROOT_PATH}/inc/host_inc
-						${LOCAL_ROOT_PATH}/inc/host_inc/gp
-						${CMAKE_CURRENT_BINARY_DIR})
-		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
-			target_link_directories(${OUTPUT} PRIVATE ${SECGEAR_INSTALL_PATH})
-		endif()
-	endif()
-
-In the case of iTrustee, set the search paths of the header file and compile the final non-secure binary.
-
-	if(CC_SGX)
-		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
-			link_directories(${SECGEAR_INSTALL_PATH})
-		endif()
-		add_executable(${OUTPUT} ${SOURCE_FILE} ${AUTO_FILES})
-		target_include_directories(${OUTPUT} PRIVATE
-							${LOCAL_ROOT_PATH}/inc/host_inc
-							${LOCAL_ROOT_PATH}/inc/host_inc/sgx
-							${CMAKE_CURRENT_BINARY_DIR})
-		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
-			target_link_directories(${OUTPUT} PRIVATE ${SECGEAR_INSTALL_PATH})
-		endif()
-	endif()
-
-In the case of sgx, set the search paths of the header file and compile the final non-secure binary.
-
-	if(CC_SIM)
-            target_link_libraries(${OUTPUT} secgearsim)
-        else()
-            target_link_libraries(${OUTPUT} secgear)
-        endif()
-        set_target_properties(${OUTPUT} PROPERTIES SKIP_BUILD_RPATH TRUE)
-	if(CC_GP)
-		install(TARGETS  ${OUTPUT}
-				RUNTIME
-				DESTINATION /vendor/bin/
-				PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ)
-	endif()
-	if(CC_SGX)
-		install(TARGETS  ${OUTPUT}
-				RUNTIME
-				DESTINATION ${CMAKE_BINARY_DIR}/bin/
-				PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ)
-	endif()
-
-Based on -DCC_SIM=ON or none transferred from cmake, linking secgear or secgearsim. Specify the installation 
-path of the final binary. The non-secure side image of iTrustee must be installed on the specified whitelist. 
-The whitelist configuration will be introduced below.
-
-### 4 Write security side code, CMakeLists.txt and some configuration files
-	
-#### 4.1 Create a new enclave directory and write hello.c
-
-	#include <stdio.h>
-	#include <string.h>
-	#include "test_t.h"
-
-	#define TA_HELLO_WORLD        "secGear hello world!"
-	#define BUF_MAX 32
-	int get_string(char *buf)
-	{
-		strncpy(buf, TA_HELLO_WORLD, strlen(TA_HELLO_WORLD) + 1);
-		return 0;
-	}
-
-Import the test_t.h generated by the automatic code generation tool, and then write the function according to the
-interface description in test.edl.
-	
-#### 4.2 Write CMakeLists.txt
-
-	#set auto code prefix
-	set(PREFIX test)
-	#set sign key
-	set(PEM Enclave_private.pem)
-
-Set the name used to sign the enclave private key
-
-	#set sign tool
-	set(SIGN_TOOL ${LOCAL_ROOT_PATH}/tools/sign_tool/sign_tool.sh)
-	#set enclave src code
-	set(SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/hello.c)
-	#set log level
-	set(PRINT_LEVEL 3)
-	add_definitions(-DPRINT_LEVEL=${PRINT_LEVEL})
-
-Set sign tool and the security side log printing level
-
-	if(CC_GP)
-            #set signed output
-            set(OUTPUT ${UUID}.sec)
-            #set itrustee device key
-            set(DEVICEPEM ${CMAKE_CURRENT_SOURCE_DIR}/rsa_public_key_cloud.pem)
-
-            set(WHITE_LIST_0 /vendor/bin/helloworld)
-            set(WHITE_LIST_1 /vendor/bin/secgear_test)
-            set(WHITE_LIST_OWNER root)
-            set(WHITELIST WHITE_LIST_0 WHITE_LIST_1)
-
-            set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.c ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_args.h)
-            add_custom_command(OUTPUT ${AUTO_FILES}
-            DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
-            COMMAND ${CODEGEN} --${CODETYPE} --trusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/gp)
-	endif()
-
-WHITE_LIS_X sets the whitelist of itrustee, only the host binary of these paths can call this secure image,
-and up to 8 list paths can be configured. WHITE_LIST_OWNER set user, this user will be applied to all whitelist paths.
-DEVICEPEM public key is used by itrustee and is used to encrypt the enclave image of the security side with the
-dynamically generated aes key. Finally, set the name of the security side image after the final signature, and
-generate auxiliary code.
-
-	if(CC_SGX)
-	        set(OUTPUT enclave.signed.so)
-	        set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.c)
-	        add_custom_command(OUTPUT ${AUTO_FILES}
-	        DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
-	        COMMAND ${CODEGEN} --${CODETYPE} --trusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/sgx --search-path ${SGXSDK}/include)
-	endif()
-
-In the case of sgx, set the name of the security side image after the final signature, and generate auxiliary code.
-
-	set(COMMON_C_FLAGS "-W -Wall -Werror  -fno-short-enums  -fno-omit-frame-pointer -fstack-protector \
-			-Wstack-protector --param ssp-buffer-size=4 -frecord-gcc-switches -Wextra -nostdinc -nodefaultlibs \
-			-fno-peephole -fno-peephole2 -Wno-main -Wno-error=unused-parameter \
-			-Wno-error=unused-but-set-variable -Wno-error=format-truncation=")
-
-	set(COMMON_C_LINK_FLAGS "-Wl,-z,now -Wl,-z,relro -Wl,-z,noexecstack -Wl,-nostdlib -nodefaultlibs -nostartfiles")
-	
-Set the security side, no matter whether it is sgx or itrustee will use some compilation and link options, for
-example, because the security side is different from the non-secure side, the default library of host OS cannot be used,
-so -nostdinc -nodefaultlibs -nostdlib -nodefaultlibs compile link options was introduced.
-
-	if(CC_GP)
-		configure_file("${CMAKE_CURRENT_SOURCE_DIR}/manifest.txt.in" "${CMAKE_CURRENT_SOURCE_DIR}/manifest.txt")
-
-		set(CMAKE_C_FLAGS "${COMMON_C_FLAGS}  -march=armv8-a ")
-		set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS}  -s -fPIC")
-		set(CMAKE_SHARED_LINKER_FLAGS  "${COMMON_C_LINK_FLAGS} -Wl,-s")
-
-		set(ITRUSTEE_TEEDIR ${iTrusteeSDK}/)
-		set(ITRUSTEE_LIBC ${iTrusteeSDK}/thirdparty/open_source/musl/libc)
-
-		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
-			link_directories(${SECGEAR_INSTALL_PATH})
-		endif()
-
-		add_library(${PREFIX} SHARED ${SOURCE_FILES} ${AUTO_FILES})
-
-		target_include_directories( ${PREFIX} PRIVATE
-			${CMAKE_CURRENT_BINARY_DIR}
-			${LOCAL_ROOT_PATH}/inc/host_inc
-			${LOCAL_ROOT_PATH}/inc/host_inc/gp
-			${LOCAL_ROOT_PATH}/inc/enclave_inc
-			${LOCAL_ROOT_PATH}/inc/enclave_inc/gp
-			${ITRUSTEE_TEEDIR}/include/TA
-			${ITRUSTEE_TEEDIR}/include/TA/huawei_ext
-			${ITRUSTEE_LIBC}/arch/aarch64
-			${ITRUSTEE_LIBC}/
-			${ITRUSTEE_LIBC}/arch/arm/bits
-			${ITRUSTEE_LIBC}/arch/generic
-			${ITRUSTEE_LIBC}/arch/arm
-			${LOCAL_ROOT_PATH}/inc/enclave_inc/gp/itrustee)
-
-		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
-			target_link_directories(${PREFIX} PRIVATE ${SECGEAR_INSTALL_PATH})
-		endif()
-
-		foreach(WHITE_LIST ${WHITELIST})
-			add_definitions(-D${WHITE_LIST}="${${WHITE_LIST}}")
-		endforeach(WHITE_LIST)
-		add_definitions(-DWHITE_LIST_OWNER="${WHITE_LIST_OWNER}")
-
-		target_link_libraries(${PREFIX} -lsecgear_tee)
-
-		add_custom_command(TARGET ${PREFIX}
-			POST_BUILD
-			COMMAND bash ${SIGN_TOOL} -d sign -x trustzone -i lib${PREFIX}.so -m ${CMAKE_CURRENT_SOURCE_DIR}/manifest.txt
-			-e ${DEVICEPEM} -o ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT})
-
-		install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT}
-			DESTINATION /data
-			PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ GROUP_READ GROUP_EXECUTE  WORLD_READ  WORLD_EXECUTE)
-
-	endif()
-
-In the case of iTrustee, generate the configuration file manifest.txt, which details of the configuration file will
-be explained later, specify some compilation options related to itrustee, set the search paths of the header file and
-the link file, and compile the enclave binary.
-
-Regarding the use of itrustee ocall, there are some other notes, which will be introduced later. Then define the
-whitelist macro. Next, you need to link to the secgear_tee library, in which there are interfaces for generating
-random numbers, seal, unseal, etc. The last step is to sign and install.
-
-	if(CC_SGX)
-		set(SGX_DIR ${SGXSDK})
-		set(CMAKE_C_FLAGS "${COMMON_C_FLAGS} -m64 -fvisibility=hidden")
-		set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS}  -s")
-		set(LINK_LIBRARY_PATH ${SGX_DIR}/lib64)
-
-		if(CC_SIM)
-			set(Trts_Library_Name sgx_trts_sim)
-			set(Service_Library_Name sgx_tservice_sim)
-		else()
-			set(Trts_Library_Name sgx_trts)
-			set(Service_Library_Name sgx_tservice)
-		endif()
-
-		set(Crypto_Library_Name sgx_tcrypto)
-
-		set(CMAKE_SHARED_LINKER_FLAGS  "${COMMON_C_LINK_FLAGS} -Wl,-z,defs -Wl,-pie -Bstatic -Bsymbolic -eenclave_entry \
-			-Wl,--export-dynamic -Wl,--defsym,__ImageBase=0 -Wl,--gc-sections -Wl,--version-script=${CMAKE_CURRENT_SOURCE_DIR}/Enclave.lds")
-
-		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
-			link_directories(${LINK_LIBRARY_PATH})
-		endif()
-
-		add_library(${PREFIX}  SHARED ${SOURCE_FILES} ${AUTO_FILES})
-
-		target_include_directories(${PREFIX} PRIVATE
-				${CMAKE_CURRENT_BINARY_DIR}
-				${SGX_DIR}/include/tlibc
-				${SGX_DIR}/include/libcxx
-				${SGX_DIR}/include
-				${LOCAL_ROOT_PATH}/inc/host_inc
-				${LOCAL_ROOT_PATH}/inc/host_inc/sgx)
-
-		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
-			target_link_directories(${PREFIX} PRIVATE
-					${LINK_LIBRARY_PATH})
-		endif()
-
-		target_link_libraries(${PREFIX}  -Wl,--whole-archive ${Trts_Library_Name} -Wl,--no-whole-archive
-					-Wl,--start-group -lsgx_tstdc -lsgx_tcxx -l${Crypto_Library_Name} -l${Service_Library_Name}   -Wl,--end-group)
-		add_custom_command(TARGET ${PREFIX}
-		POST_BUILD
-		COMMAND openssl genrsa -3 -out ${PEM} 3072
-		COMMAND bash ${SIGN_TOOL} -d sign -x sgx -i lib${PREFIX}.so -k ${PEM} -o ${OUTPUT} -c ${CMAKE_CURRENT_SOURCE_DIR}/Enclave.config.xml)
-	endif()
-
-In the case of sgx, specify some compilation, link options related to sgx.  When linking libraries, sgx and itrustee
-are quite different. This is because itrustee is a secure OS with more capabilities, such as musl libc and openssl.
-When compiling and link itrustee's enclave, there is no need to link some basic libraries. But sgx has no OS concept.
-The basic library interfaces to be called on the security side are all given in the sgx sdk in the form of static
-libraries, so this requires us to link these static libraries, and in order to be able to use these static libraries
-correctly, some libraries must be linked between specified options, such as sgx_trts.
-
-For more detailed information, please refer to the Makefile of sgx examples. Finally, sign the enclave with the
-configuration file, which will be introduced later. Note that secGear does not currently support remote authentication.
-	
-	set_target_properties(${PREFIX} PROPERTIES SKIP_BUILD_RPATH TRUE)
-	
-Set some safe compilation options.
-	
-#### 4.3 Enclave image configuration file
-	
-Write sgx enclave related configuration files
-The configuration content in the Enclave.config.xml and Enclave.lds files is the same as the official sgx
-configuration file.  For details, please refer to the official development document.
-
-Write itrustee related configuration files
-The gpd.ta.appID in the manifest.txt.in file is the uuid configuration item, which is dynamically generated, 
-and the other configuration items can refer to the itrustee development document.
-
-Copy the rsa_public_key_cloud.pem device public key from other examples in the project to the enclave directory.
-The device public key here is used to encrypt the enclave image with the temporarily generated aes key.
-	
-### 5 build and install test
-
-Enter the development directory .../secGear/examples/test/, then run mkdir debug && cd debug
-&& cmake -DCMAKE_BUILD_TYPE=Debug -DCC_SGX=ON -DSGXSDK=sgx_sdk path .. &&  make && sudo make install OR
-mkdir debug && cd debug && cmake -DCMAKE_BUILD_TYPE=Debug -DCC_GP=ON -DiTrusteeSDK=gp_sdk path .. && make
-&& sudo make install
-
-Log
----
-Non-secure side log record:
-
-Non-secure side development, similar to ordinary development, users can implement non-secure side application logs
-by themselves
-
-Security side log record:
-
-Security side development, due to restrictions on the different security capabilities of each platform, it is
-impossible to directly develop the log function like the non-secure side, Therefore, we provide the PrintInfo
-interface to record the security side log to the Syslog system. The related configuration files secgear and secgear.conf
-have been installed in the system directory during the build and install secGear phase.
-	
-Note that when using on itrustee, you need to import the secgear_log.h header file, but sgx does not need it.
-Because sgx implements the log function through ocall, the relevant code is in the auxiliary code. And when the
-configuration file is installed, you need to run "systemctl restart rsyslog"  to make the log effective.
-
-Finally, in order to enable itrustee logs to be dumped to the place specified in the configuration file, you also
-need to run /vendor/bin/tlogcat -f. The tlogcat tool is a part of the itrustee sdk.
-	
-The meaning of log level (set(PRINT_LEVEL 3)). 
-
-    PRINT_ERROR    0
-    PRINT_WARNING  1
-    PRINT_STRACE   2
-    PRINT_DEBUG    3
-
-At present, there are some differences in the usage of the log function. After the itrustee ocall function is stable,
-the usage will be unified.
-
-Use ocall
----------
-
-The secGear ocall function can be used normally on the sgx platform. There are currently restrictions on itrustee:
-
-    only the specified a3d88d2a-ae2a-4ea5-a37d-35fc5f607e9e uuid can be used, 
-    and two programs that enable ocall cannot be run at the same time, 
-    and config cannot be enabled. ta.instanceKeepAlive.
-	
-Moreover, if the underlying itrustee does not enable ocall, the SDK will only report an error registration ocall failure,
-and the ecall function can be used normally.
-
-Seal, generate random number interface
---------------------------------------
-
-The related interface is defined in secgear_dataseal.h, secgear_random.h. For usage, please refer to examples/seal_data.
-Note: Since the feature for itrustee to derive keys is still not perfect, seal related interfaces are not currently
-supported on the itrustee platform.
-
-Remote authentication capability is currently not supported.
-------------------------------------------------------------
-
-secGear does not currently support plc, switchless and other about sgx features.
---------------------------------------------------------------------------------
-
-Learning More About codegener
-----------------------------
-
-secGear Introduce EDL (Enclave Description Languate) and intermediate code generation tool codegener. EDL is
-compatible with Intel SGX's definition.
-
-- [Learn how to use codegener](./docs/codegener.md)
-
-Learning More About sign_tool
------------------------------
-
-secGear introduce the signing tool to sign the enclave.
-
-- [Learn how to use signing tool](./docs/sign_tool.md)
-
-Milestone
----------
-<img src="docs/milestone.png" alt="secGear" style="zoom:80%;" />
-
+<img src="docs/logo.png" alt="secGear" style="zoom:100%;" />
+
+secGear
+============================
+
+介绍
+-----------
+
+SecGear则是面向计算产业的机密计算安全应用开发套件。旨在方便开发者在不同的硬件设备上提供统一开发框架。目前secGear支持intel SGX硬件和Trustzone itrustee。
+
+构建、安装
+----------------
+
+- [详见 构建、安装](./docs/build_install.md)
+
+开发应用和编译
+------------------------------
+
+开发目录 .../secGear/examples/test/
+
+### 1 编写edl接口文件
+
+	enclave {
+		include "secgear_urts.h"
+		from "secgear_tstdc.edl" import *;
+		trusted {
+			public int get_string([out, size=32]char *buf);
+		};
+	};
+'include "secgear_urts.h" from "secgear_tstdc.edl" import *'是为了屏蔽SGX和iTrustee在调用libc库之间的差异。所以为了开发代码的一致性，默认导入这两个文件。
+有关edl语法的详细信息，请参阅SGX开发文档定义的EDL(Enclave Definition Language)语法部分。
+目前SGX和iTrustee在基本类型、指针类型和深拷贝方面是相互兼容的。对于user_check、private ecalls、switchless特性仅支持sgx硬件。
+
+保存文件名为test.edl
+
+### 2 编写最外层CMakeLists.txt文件
+
+	cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
+	project(TEST  C)
+	set(CMAKE_C_STANDARD 99)
+	set(CURRENT_ROOT_PATH ${CMAKE_CURRENT_SOURCE_DIR})
+	set(EDL_FILE test.edl)
+	set(LOCAL_ROOT_PATH "$ENV{CC_SDK}")
+        set(SECGEAR_INSTALL_PATH /lib64/)
+	if(CC_GP)
+		set(CODETYPE trustzone)
+		set(CODEGEN codegen_arm64)
+		execute_process(COMMAND uuidgen -r OUTPUT_VARIABLE UUID)
+		string(REPLACE "\n" "" UUID ${UUID})
+		add_definitions(-DPATH="/data/${UUID}.sec")
+	endif()
+	if(CC_SGX)
+		set(CODETYPE sgx)
+		set(CODEGEN codegen_x86_64)
+		add_definitions(-DPATH="${CMAKE_CURRENT_BINARY_DIR}/enclave/enclave.signed.so")
+	endif()
+	add_subdirectory(${CURRENT_ROOT_PATH}/enclave)
+	add_subdirectory(${CURRENT_ROOT_PATH}/host)
+
+EDL_FILE、CODETYPE：稍后自动构建的时候会用到这些属性。
+UUID：在iTrustee中，构建安全enclave动态库需要使用UUID命名，这里由uuidgen命令自动生成。
+DPATH：用于定义非安全侧使用安全侧动态库的绝对路径
+
+### 3 编写非安全侧代码和CMakeLists.txt文件
+
+#### 3.1 创建host目录和main.c文件
+
+	#include <stdio.h>
+	#include "enclave.h"
+	#include "test_u.h"
+
+	#define BUF_LEN 32
+
+	int main()
+	{
+		int  retval = 0;
+		char *path = PATH;
+		char buf[BUF_LEN];
+		cc_enclave_t *context = NULL;
+		cc_enclave_result_t res;
+		
+		res = cc_enclave_create(path, AUTO_ENCLAVE_TYPE, 0, SECGEAR_DEBUG_FLAG, NULL, 0, &context);
+		...
+
+		res = get_string(context, &retval, buf);
+		if (res != CC_SUCCESS || retval != (int)CC_SUCCESS) {
+			printf("Ecall enclave error\n");
+		} else {
+			printf("%s\n", buf);
+		}
+
+		if (context != NULL) {
+			res = cc_enclave_destroy(context);
+			...
+		}
+		return res;
+	}
+
+enclave.h: secGear库头文件
+test_u.h: 根据edl文件自动生成的非安全侧头文件。
+cc_enclave_create: 用于创建enclave安全上下文。
+get_string: 根据edl中trusted定义的安全侧代理函数，该代理函数用于进入到安全侧执行安全代码。
+cc_enclave_destroy: 用于销毁enclave安全上下文。
+
+注意：这里调用的get_string函数与在edl中定义的get_string函数有些不同，这里的参数比edl中定义的多了前两个参数，分别是enclave安全上下文
+和retval参数。这是因为codegen（自动生成代码工具）通过edl生成的非安全侧代理函数，其声明在test_u.h中。
+如果在edl中定义的函数无返回值时，例如"public void get_string([out,size=32] char *buf);"则非安全侧代理函数为
+"res=get_string(context, buf)"(这里就不在有retval参数)
+
+#### 3.2 编写非安全侧CMakeLists.txt
+
+        #set auto code prefix
+	set(PREFIX test)
+	#set host exec name
+	set(OUTPUT secgear_test)
+	#set host src code
+	set(SOURCE_FILE ${CMAKE_CURRENT_SOURCE_DIR}/main.c)    
+
+设置预备的基础变量
+
+        #set auto code
+	if(CC_GP)
+		set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.c ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_args.h)
+		add_custom_command(OUTPUT ${AUTO_FILES}
+		DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
+		COMMAND ${CODEGEN} --${CODETYPE} --untrusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/gp)
+	endif()
+
+	if(CC_SGX)
+		set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_u.c)
+		add_custom_command(OUTPUT ${AUTO_FILES}
+		DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
+		COMMAND ${CODEGEN} --${CODETYPE} --untrusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/sgx  --search-path ${SGXSDK}/include)
+	endif()
+
+设置使用代码辅助生成工具根据edl文件生成辅助代码。CODEGEN和CODETYPE等变量定义在CMakeList.txt文件.--search-path用于搜索在edl文件中导入依赖的其他edl文件。
+当使用SGX时，需要导入sgx提供的基础edl，因此这里指定了SGXSDK的patch "--search-path ${SGXSDK}/include)"。
+
+	set(CMAKE_C_FLAGS "-fstack-protector-all -W -Wall -Werror -Wextra -Werror=array-bounds -D_FORTIFY_SOURCE=2 -O2 -ftrapv -fPIE")
+	set(CMAKE_EXE_LINKER_FLAGS    "-Wl,-z,relro -Wl,-z,now -Wl,-z,noexecstack")
+
+设置编译选项和链接选项
+
+	if(CC_GP)
+		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
+			link_directories(${SECGEAR_INSTALL_PATH})
+		endif()
+		add_executable(${OUTPUT} ${SOURCE_FILE} ${AUTO_FILES})
+		target_include_directories(${OUTPUT} PRIVATE
+						${LOCAL_ROOT_PATH}/inc/host_inc
+						${LOCAL_ROOT_PATH}/inc/host_inc/gp
+						${CMAKE_CURRENT_BINARY_DIR})
+		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
+			target_link_directories(${OUTPUT} PRIVATE ${SECGEAR_INSTALL_PATH})
+		endif()
+	endif()
+
+在iTrustee硬件环境上，设置头文件的搜索路径及编译生成非安全侧二进制文件。
+
+	if(CC_SGX)
+		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
+			link_directories(${SECGEAR_INSTALL_PATH})
+		endif()
+		add_executable(${OUTPUT} ${SOURCE_FILE} ${AUTO_FILES})
+		target_include_directories(${OUTPUT} PRIVATE
+							${LOCAL_ROOT_PATH}/inc/host_inc
+							${LOCAL_ROOT_PATH}/inc/host_inc/sgx
+							${CMAKE_CURRENT_BINARY_DIR})
+		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
+			target_link_directories(${OUTPUT} PRIVATE ${SECGEAR_INSTALL_PATH})
+		endif()
+	endif()
+
+在SGX硬件环境上，设置头文件的搜索路径及编译生成非安全侧二进制文件。
+
+	if(CC_SIM)
+            target_link_libraries(${OUTPUT} secgearsim)
+        else()
+            target_link_libraries(${OUTPUT} secgear)
+        endif()
+        set_target_properties(${OUTPUT} PROPERTIES SKIP_BUILD_RPATH TRUE)
+	if(CC_GP)
+		install(TARGETS  ${OUTPUT}
+				RUNTIME
+				DESTINATION /vendor/bin/
+				PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ)
+	endif()
+	if(CC_SGX)
+		install(TARGETS  ${OUTPUT}
+				RUNTIME
+				DESTINATION ${CMAKE_BINARY_DIR}/bin/
+				PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ)
+	endif()
+
+
+设置secGear链接库，当指定模拟模式CC_SIM时链接libsecgearsim.so，否则链接libsecgear.so。
+在iTrustee硬件环境上需指定安装固定的安全白名单。
+
+### 4 编写安全侧代码、CMakeList.txt及基础配置文件
+
+#### 4.1 创建enclave目录 编写hello.c
+
+	#include <stdio.h>
+	#include <string.h>
+	#include "test_t.h"
+
+	#define TA_HELLO_WORLD        "secGear hello world!"
+	#define BUF_MAX 32
+	int get_string(char *buf)
+	{
+		strncpy(buf, TA_HELLO_WORLD, strlen(TA_HELLO_WORLD) + 1);
+		return 0;
+	}
+
+test_t.h：该头文件为自动生成代码工具codegen通过edl文件生成的头文件。该头文件命名为edl文件名加"_t"。
+
+#### 4.2 编写CMakeList.txt文件
+
+	#set auto code prefix
+	set(PREFIX test)
+	#set sign key
+	set(PEM Enclave_private.pem)
+
+设置enclave签名私钥
+
+	#set sign tool
+	set(SIGN_TOOL ${LOCAL_ROOT_PATH}/tools/sign_tool/sign_tool.sh)
+	#set enclave src code
+	set(SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/hello.c)
+	#set log level
+	set(PRINT_LEVEL 3)
+	add_definitions(-DPRINT_LEVEL=${PRINT_LEVEL})
+
+设置签名工具已经安全侧打印日志level
+
+	if(CC_GP)
+            #set signed output
+            set(OUTPUT ${UUID}.sec)
+            #set itrustee device key
+            set(DEVICEPEM ${CMAKE_CURRENT_SOURCE_DIR}/rsa_public_key_cloud.pem)
+
+            set(WHITE_LIST_0 /vendor/bin/helloworld)
+            set(WHITE_LIST_1 /vendor/bin/secgear_test)
+            set(WHITE_LIST_OWNER root)
+            set(WHITELIST WHITE_LIST_0 WHITE_LIST_1)
+
+            set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.c ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_args.h)
+            add_custom_command(OUTPUT ${AUTO_FILES}
+            DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
+            COMMAND ${CODEGEN} --${CODETYPE} --trusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/gp)
+	endif()
+
+WHITE_LIST_x：为设置iTrustee的二进制白名单，只有这里定义的白名单，在非安全侧的二进制才可以调用安全侧的动态库。上限为8个。
+WHITE_LIST_OWNER：为设置运行二进制的用户，只有该用户才可以调用安全侧动态库。
+DEVICEPEM：该公钥用来动态生成aes秘钥
+AUTO_FILES：由edl文件生成的安全侧二进制文件
+
+        if(CC_SGX)
+	        set(OUTPUT enclave.signed.so)
+	        set(AUTO_FILES  ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.h ${CMAKE_CURRENT_BINARY_DIR}/${PREFIX}_t.c)
+	        add_custom_command(OUTPUT ${AUTO_FILES}
+	        DEPENDS ${CURRENT_ROOT_PATH}/${EDL_FILE}
+	        COMMAND ${CODEGEN} --${CODETYPE} --trusted ${CURRENT_ROOT_PATH}/${EDL_FILE} --search-path ${LOCAL_ROOT_PATH}/inc/host_inc/sgx --search-path ${SGXSDK}/include)
+	endif()
+
+设置自动生成代码及签名动态库。
+
+	set(COMMON_C_FLAGS "-W -Wall -Werror  -fno-short-enums  -fno-omit-frame-pointer -fstack-protector \
+			-Wstack-protector --param ssp-buffer-size=4 -frecord-gcc-switches -Wextra -nostdinc -nodefaultlibs \
+			-fno-peephole -fno-peephole2 -Wno-main -Wno-error=unused-parameter \
+			-Wno-error=unused-but-set-variable -Wno-error=format-truncation=")
+
+	set(COMMON_C_LINK_FLAGS "-Wl,-z,now -Wl,-z,relro -Wl,-z,noexecstack -Wl,-nostdlib -nodefaultlibs -nostartfiles")
+
+设置安全侧便编译选项和链接选项。由于安全侧和非安全侧不同，非安全侧的标准动态库不能被安全侧链接。例如："-nostdlib -nodefaultlibs -nostartfiles"
+
+
+	if(CC_GP)
+		configure_file("${CMAKE_CURRENT_SOURCE_DIR}/manifest.txt.in" "${CMAKE_CURRENT_SOURCE_DIR}/manifest.txt")
+
+		set(CMAKE_C_FLAGS "${COMMON_C_FLAGS}  -march=armv8-a ")
+		set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS}  -s -fPIC")
+		set(CMAKE_SHARED_LINKER_FLAGS  "${COMMON_C_LINK_FLAGS} -Wl,-s")
+
+		set(ITRUSTEE_TEEDIR ${iTrusteeSDK}/)
+		set(ITRUSTEE_LIBC ${iTrusteeSDK}/thirdparty/open_source/musl/libc)
+
+		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
+			link_directories(${SECGEAR_INSTALL_PATH})
+		endif()
+
+		add_library(${PREFIX} SHARED ${SOURCE_FILES} ${AUTO_FILES})
+
+		target_include_directories( ${PREFIX} PRIVATE
+			${CMAKE_CURRENT_BINARY_DIR}
+			${LOCAL_ROOT_PATH}/inc/host_inc
+			${LOCAL_ROOT_PATH}/inc/host_inc/gp
+			${LOCAL_ROOT_PATH}/inc/enclave_inc
+			${LOCAL_ROOT_PATH}/inc/enclave_inc/gp
+			${ITRUSTEE_TEEDIR}/include/TA
+			${ITRUSTEE_TEEDIR}/include/TA/huawei_ext
+			${ITRUSTEE_LIBC}/arch/aarch64
+			${ITRUSTEE_LIBC}/
+			${ITRUSTEE_LIBC}/arch/arm/bits
+			${ITRUSTEE_LIBC}/arch/generic
+			${ITRUSTEE_LIBC}/arch/arm
+			${LOCAL_ROOT_PATH}/inc/enclave_inc/gp/itrustee)
+
+		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
+			target_link_directories(${PREFIX} PRIVATE ${SECGEAR_INSTALL_PATH})
+		endif()
+
+		foreach(WHITE_LIST ${WHITELIST})
+			add_definitions(-D${WHITE_LIST}="${${WHITE_LIST}}")
+		endforeach(WHITE_LIST)
+		add_definitions(-DWHITE_LIST_OWNER="${WHITE_LIST_OWNER}")
+
+		target_link_libraries(${PREFIX} -lsecgear_tee)
+
+		add_custom_command(TARGET ${PREFIX}
+			POST_BUILD
+			COMMAND bash ${SIGN_TOOL} -d sign -x trustzone -i lib${PREFIX}.so -m ${CMAKE_CURRENT_SOURCE_DIR}/manifest.txt
+			-e ${DEVICEPEM} -o ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT})
+
+		install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT}
+			DESTINATION /data
+			PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ GROUP_READ GROUP_EXECUTE  WORLD_READ  WORLD_EXECUTE)
+
+	endif()
+
+manifest.txt：itrustee安全侧配置文件，后面对该文件进行详解
+指定itrustee特性编译选项，设置引用头文件和动态库的路径。
+前面声明的白名单在这里定义。
+itrustee需要链接secgear_tee动态库，提供seal接口等。
+
+	if(CC_SGX)
+		set(SGX_DIR ${SGXSDK})
+		set(CMAKE_C_FLAGS "${COMMON_C_FLAGS} -m64 -fvisibility=hidden")
+		set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS}  -s")
+		set(LINK_LIBRARY_PATH ${SGX_DIR}/lib64)
+
+		if(CC_SIM)
+			set(Trts_Library_Name sgx_trts_sim)
+			set(Service_Library_Name sgx_tservice_sim)
+		else()
+			set(Trts_Library_Name sgx_trts)
+			set(Service_Library_Name sgx_tservice)
+		endif()
+
+		set(Crypto_Library_Name sgx_tcrypto)
+
+		set(CMAKE_SHARED_LINKER_FLAGS  "${COMMON_C_LINK_FLAGS} -Wl,-z,defs -Wl,-pie -Bstatic -Bsymbolic -eenclave_entry \
+			-Wl,--export-dynamic -Wl,--defsym,__ImageBase=0 -Wl,--gc-sections -Wl,--version-script=${CMAKE_CURRENT_SOURCE_DIR}/Enclave.lds")
+
+		if(${CMAKE_VERSION} VERSION_LESS "3.13.0")
+			link_directories(${LINK_LIBRARY_PATH})
+		endif()
+
+		add_library(${PREFIX}  SHARED ${SOURCE_FILES} ${AUTO_FILES})
+
+		target_include_directories(${PREFIX} PRIVATE
+				${CMAKE_CURRENT_BINARY_DIR}
+				${SGX_DIR}/include/tlibc
+				${SGX_DIR}/include/libcxx
+				${SGX_DIR}/include
+				${LOCAL_ROOT_PATH}/inc/host_inc
+				${LOCAL_ROOT_PATH}/inc/host_inc/sgx)
+
+		if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0")
+			target_link_directories(${PREFIX} PRIVATE
+					${LINK_LIBRARY_PATH})
+		endif()
+
+		target_link_libraries(${PREFIX}  -Wl,--whole-archive ${Trts_Library_Name} -Wl,--no-whole-archive
+					-Wl,--start-group -lsgx_tstdc -lsgx_tcxx -l${Crypto_Library_Name} -l${Service_Library_Name}   -Wl,--end-group)
+		add_custom_command(TARGET ${PREFIX}
+		POST_BUILD
+		COMMAND openssl genrsa -3 -out ${PEM} 3072
+		COMMAND bash ${SIGN_TOOL} -d sign -x sgx -i lib${PREFIX}.so -k ${PEM} -o ${OUTPUT} -c ${CMAKE_CURRENT_SOURCE_DIR}/Enclave.config.xml)
+	endif()
+
+
+在SGX硬件环境上，指定一些与sgx相关的编译选项、链接选项。链接动态库时有所不同，因为itrustee是一个具有更多功能的安全操作系统。提供如muslibc和openssl。在编译和链接itrustee时不用链接一些基本库，但是sgx没有OS概念。所以要在安全侧调用这些基本库的接口都要以静态的形式在sgxsdk中给出。例如"sgx_trts"
+
+有关更多详细信息，请参阅sgx示例的Makefile。最后用enclave配置文件完成签名，稍后将进行介绍。secGear尚不支持远程身份验证。
+
+#### 4.3 编写安全侧配置文件
+
+编写与sgx enclave相关的配置文件中Enclave.config.xml文件及enclave.lds文件与官方sgx配置相同。详情参阅官方开发文档。
+
+编写itrustee enclave相关配置文件
+mainfest.txt.in:其中gpd.ta.appID 为动态生成uuid。其他配置参见itrustee开发文档。
+
+rsa_public_key_cloud.pem文件请将其他examples的中的拷贝过来，这里的设备公钥用于使用临时生成的aes密钥用于对enclave动态库进行加密。
+
+#### 5 构建 安装
+
+进入开发目录：cd .../secGear/example/test/
+创建debug目录：mkdir debug && cd debug
+cmake构建：cmake -DCMAKE_BUILD_TYPE=Debug -DCC_SGX=ON -DSGXSDK=sgx_sdk path .. &&  make && sudo make install （sgx硬件环境）
+          cmake -DCMAKE_BUILD_TYPE=Debug -DCC_GP=ON -DiTrusteeSDK=gp_sdk path .. && make && sudo make install （itrustee硬件环境）
+
+Log
+---
+非安全侧日志记录：
+
+非安全侧是开发与普通开发环境一样，可使用通用打印日志接口。
+
+安全侧日志记录：
+
+由于各架构安全能力不同的限制，为了像非安全侧一样开发使用日志打印功能，因为我们提供了PrintInfo接口将安全端日志记录到syslog系统中。
+相关配置文件为 conf/logrotate.d/secgear和conf/rsyslog.d/secgear.conf文件，安装时将安装在系统目录/etc/中。
+
+注意：在itrustee上，需要include secgear_log.h头文件，但是sgx不需要，sgx通过ocall功能实现的，所以相关代码生成在辅助代码中。
+当文件安装成功后需要运行"systemctl restart rsyslog"使日志功能生效。
+
+日志等级：
+
+    PRINT_ERROR    0
+    PRINT_WARNING  1
+    PRINT_STRACE   2
+    PRINT_DEBUG    3
+
+使用ocall
+---------
+
+目前ocall仅在sgx平台支持，itrustee尚不支持。
+
+seal, generate_random接口
+--------------------------------------
+
+接口定义在secgear_dataseal.h、secgear_random.h中。
+注意：由于itrustee派生密钥的功能仍然不完善，因此目前还没有与密封相关的接口在itrustee平台上支持。
+
+远程证明（尚不支持）
+--------------------------------------
+
+了解更多关于codegener
+--------------------------------------
+
+secGear引入EDL(Enclave Description Language)和中间代码辅助生成工具codegener。edl与intel sgx定义兼容。
+
+
+- [了解更多关于codegener](./docs/codegener.md)
+
+了解更多关于sign_tool
+-----------------------------
+
+
+- [了解更多关于签名工具](./docs/sign_tool.md)
+
+里程碑
+---------
+<img src="docs/milestone.png" alt="secGear" style="zoom:80%;" />
\ No newline at end of file
-- 
2.27.0

