From 43e342cee047cd0ec1111d80ad3cd7547ca4d5a7 Mon Sep 17 00:00:00 2001
From: zzy <835280708@qq.com>
Date: Wed, 24 May 2023 10:39:28 +0800
Subject: [PATCH] change sdk doc Signed-off-by: zzy <835280708@qq.com>

---
 docs/TEE_TA_guide/TEE-TA开发指南.md | 3 ++-
 sdk/README.md                       | 4 ++--
 sdk/README_zh.md                    | 4 ++--
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/docs/TEE_TA_guide/TEE-TA开发指南.md b/docs/TEE_TA_guide/TEE-TA开发指南.md
index 0626f08..45787bc 100644
--- a/docs/TEE_TA_guide/TEE-TA开发指南.md
+++ b/docs/TEE_TA_guide/TEE-TA开发指南.md
@@ -737,7 +737,8 @@ keytools工具输出产物将放于output路径下，输出及用途如下表所
     ```
     ./build.sh
     ```
-
+编译生成so签名之前会对so进行符号检查：对TA中使用的未定义的符号进行检查。如果符号未出现在headers_check.txt中配置的路径里面的头文件中，则会报错退出。
+如果需要外部头文件声明的符号，可以将相对路径填写在headers_check.txt配置文件中。
 
 ## CA\(Certification Authority\)说明<a name="section1087132913217"></a>
 
diff --git a/sdk/README.md b/sdk/README.md
index 11ecf96..83a52c6 100644
--- a/sdk/README.md
+++ b/sdk/README.md
@@ -8,7 +8,7 @@
 
 ## Introduction <a name="section11660541593"></a>
 
-The SDK capabilities include: TA compilation dependent scripts and header files, TA's ability to issue certificates and sign perm_config signatures, and sec file signatures.
+The SDK capabilities include: TA compilation dependent scripts and header files, TA's ability to issue certificates and sign perm_config signatures, and TA symbol checker, sec file signatures.
 
 ## Content <a name="section161941989596"></a>
 
@@ -22,7 +22,7 @@ The warehouse directory structure is as follows:
 │   ├── mk                                # make compile framework capabilities
 │   ├── pack-Config                       # Signature packaging perm_config capability
 │   ├── pack-TA                           # sec signature capability shell script
-│   ├── signtools                         # sec signature capability python script
+│   ├── signtools                         # sec signature capability python script and check TA undefined symbols.
 │   └── tools                             # ld file (32-bit and 64-bit) linked by sec file, sec file binary check shell script 
 ├── CHANGELOG                             # Changelog of sdk version.
 ├── include
diff --git a/sdk/README_zh.md b/sdk/README_zh.md
index 3505004..b750129 100644
--- a/sdk/README_zh.md
+++ b/sdk/README_zh.md
@@ -8,7 +8,7 @@
 
 ## 简介<a name="section11660541593"></a>
 
-SDK能力包含：TA编译依赖的脚本、头文件，TA颁发证书并签发perm_config签名的能力，以及sec文件签名。
+SDK能力包含：TA编译依赖的脚本、头文件，TA颁发证书并签发perm_config签名的能力，以及TA符号检查、sec文件签名。
 
 ## 目录<a name="section161941989596"></a>
 
@@ -22,7 +22,7 @@ SDK能力包含：TA编译依赖的脚本、头文件，TA颁发证书并签发p
 │   ├── mk                                # make编译框架能力
 │   ├── pack-Config                       # 签名打包perm_config能力
 │   ├── pack-TA                           # sec签名能力的shell脚本
-│   ├── signtools                         # sec签名能力的python脚本
+│   ├── signtools                         # sec签名能力的python脚本、TA未定义符号检查
 │   └── tools                             # sec文件链接的ld文件（32位和64位）、sec文件二进制检查shell脚本        
 ├── CHANGELOG                             # sdk版本的变更记录。
 ├── include